forked from osmocom/wireshark
![Michael Mann](/assets/img/avatar_default.png)
The preferences are still supported for backwards compatibility, but the heuristic_protos file has final say on the "preference" to enable/disable a heuristic dissector. Also add parameter to heur_dissector_add() for the "default" enable/disable of a heuristic dissector. With this parameter, a few more (presumably weak) heuristic dissectors have been "registered" but of course default to being disabled. Change-Id: I51bebb2146ef3fbb8418d4f5c7f2cb2b58003a22 Reviewed-on: https://code.wireshark.org/review/9610 Petri-Dish: Michael Mann <mmann78@netscape.net> Reviewed-by: Roland Knall <rknall@gmail.com> Reviewed-by: Hadriel Kaplan <hadrielk@yahoo.com> Reviewed-by: Michael Mann <mmann78@netscape.net>
6573 lines
254 KiB
C
6573 lines
254 KiB
C
/* packet-dcerpc.c
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* Routines for DCERPC packet disassembly
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* Copyright 2001, Todd Sabin <tas[AT]webspan.net>
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* Copyright 2003, Tim Potter <tpot[AT]samba.org>
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* Copyright 2010, Julien Kerihuel <j.kerihuel[AT]openchange.org>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/* The DCE RPC specification can be found at:
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* http://www.opengroup.org/dce/
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*/
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#include "config.h"
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#include <stdio.h>
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#include <epan/packet.h>
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#include <epan/exceptions.h>
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#include <epan/prefs.h>
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#include <epan/reassemble.h>
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#include <epan/tap.h>
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#include <epan/srt_table.h>
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#include <epan/expert.h>
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#include <epan/addr_resolv.h>
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#include <epan/show_exception.h>
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#include <epan/decode_as.h>
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#include "packet-tcp.h"
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#include "packet-dcerpc.h"
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#include "packet-dcerpc-nt.h"
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void proto_register_dcerpc(void);
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void proto_reg_handoff_dcerpc(void);
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static int dcerpc_tap = -1;
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/* 32bit Network Data Representation, see DCE/RPC Appendix I */
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static e_guid_t uuid_data_repr_proto = { 0x8a885d04, 0x1ceb, 0x11c9,
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{ 0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60 } };
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/* 64bit Network Data Representation, introduced in Windows Server 2008 */
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static e_guid_t uuid_ndr64 = { 0x71710533, 0xbeba, 0x4937,
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{ 0x83, 0x19, 0xb5, 0xdb, 0xef, 0x9c, 0xcc, 0x36 } };
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/* Bind Time Feature Negotiation, see [MS-RPCE] 3.3.1.5.3 */
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static e_guid_t uuid_bind_time_feature_nego_00 = { 0x6cb71c2c, 0x9812, 0x4540, { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } };
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static e_guid_t uuid_bind_time_feature_nego_01 = { 0x6cb71c2c, 0x9812, 0x4540, { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } };
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static e_guid_t uuid_bind_time_feature_nego_02 = { 0x6cb71c2c, 0x9812, 0x4540, { 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } };
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static e_guid_t uuid_bind_time_feature_nego_03 = { 0x6cb71c2c, 0x9812, 0x4540, { 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } };
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/* see [MS-OXRPC] Appendix A: Full IDL, http://msdn.microsoft.com/en-us/library/ee217991%28v=exchg.80%29.aspx */
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static e_guid_t uuid_asyncemsmdb = { 0x5261574a, 0x4572, 0x206e,
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{ 0xb2, 0x68, 0x6b, 0x19, 0x92, 0x13, 0xb4, 0xe4 } };
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static const value_string pckt_vals[] = {
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{ PDU_REQ, "Request"},
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{ PDU_PING, "Ping"},
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{ PDU_RESP, "Response"},
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{ PDU_FAULT, "Fault"},
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{ PDU_WORKING, "Working"},
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{ PDU_NOCALL, "Nocall"},
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{ PDU_REJECT, "Reject"},
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{ PDU_ACK, "Ack"},
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{ PDU_CL_CANCEL, "Cl_cancel"},
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{ PDU_FACK, "Fack"},
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{ PDU_CANCEL_ACK, "Cancel_ack"},
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{ PDU_BIND, "Bind"},
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{ PDU_BIND_ACK, "Bind_ack"},
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{ PDU_BIND_NAK, "Bind_nak"},
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{ PDU_ALTER, "Alter_context"},
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{ PDU_ALTER_ACK, "Alter_context_resp"},
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{ PDU_AUTH3, "AUTH3"},
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{ PDU_SHUTDOWN, "Shutdown"},
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{ PDU_CO_CANCEL, "Co_cancel"},
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{ PDU_ORPHANED, "Orphaned"},
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{ PDU_RTS, "RPC-over-HTTP RTS"},
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{ 0, NULL }
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};
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static const value_string drep_byteorder_vals[] = {
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{ 0, "Big-endian" },
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{ 1, "Little-endian" },
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{ 0, NULL }
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};
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static const value_string drep_character_vals[] = {
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{ 0, "ASCII" },
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{ 1, "EBCDIC" },
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{ 0, NULL }
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};
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#define DCE_RPC_DREP_FP_IEEE 0
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#define DCE_RPC_DREP_FP_VAX 1
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#define DCE_RPC_DREP_FP_CRAY 2
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#define DCE_RPC_DREP_FP_IBM 3
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static const value_string drep_fp_vals[] = {
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{ DCE_RPC_DREP_FP_IEEE, "IEEE" },
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{ DCE_RPC_DREP_FP_VAX, "VAX" },
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{ DCE_RPC_DREP_FP_CRAY, "Cray" },
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{ DCE_RPC_DREP_FP_IBM, "IBM" },
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{ 0, NULL }
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};
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/*
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* Authentication services.
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*/
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static const value_string authn_protocol_vals[] = {
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{ DCE_C_RPC_AUTHN_PROTOCOL_NONE, "None" },
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{ DCE_C_RPC_AUTHN_PROTOCOL_KRB5, "Kerberos 5" },
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{ DCE_C_RPC_AUTHN_PROTOCOL_SPNEGO, "SPNEGO" },
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{ DCE_C_RPC_AUTHN_PROTOCOL_NTLMSSP, "NTLMSSP" },
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{ DCE_C_RPC_AUTHN_PROTOCOL_GSS_SCHANNEL, "SCHANNEL SSP" },
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{ DCE_C_RPC_AUTHN_PROTOCOL_GSS_KERBEROS, "Kerberos SSP" },
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{ DCE_C_RPC_AUTHN_PROTOCOL_DPA,
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"Distributed Password Authentication SSP"},
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{ DCE_C_RPC_AUTHN_PROTOCOL_MSN, "MSN SSP"},
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{ DCE_C_RPC_AUTHN_PROTOCOL_DIGEST, "Digest SSP"},
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{ DCE_C_RPC_AUTHN_PROTOCOL_SEC_CHAN, "NETLOGON Secure Channel" },
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{ DCE_C_RPC_AUTHN_PROTOCOL_MQ, "MSMQ SSP"},
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{ 0, NULL }
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};
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/*
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* Protection levels.
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*/
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static const value_string authn_level_vals[] = {
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{ DCE_C_AUTHN_LEVEL_NONE, "None" },
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{ DCE_C_AUTHN_LEVEL_CONNECT, "Connect" },
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{ DCE_C_AUTHN_LEVEL_CALL, "Call" },
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{ DCE_C_AUTHN_LEVEL_PKT, "Packet" },
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{ DCE_C_AUTHN_LEVEL_PKT_INTEGRITY, "Packet integrity" },
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{ DCE_C_AUTHN_LEVEL_PKT_PRIVACY, "Packet privacy" },
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{ 0, NULL }
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};
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/*
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* Flag bits in first flag field in connectionless PDU header.
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*/
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#define PFCL1_RESERVED_01 0x01 /* Reserved for use by implementations */
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#define PFCL1_LASTFRAG 0x02 /* If set, the PDU is the last
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* fragment of a multi-PDU
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* transmission */
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#define PFCL1_FRAG 0x04 /* If set, the PDU is a fragment of
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a multi-PDU transmission */
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#define PFCL1_NOFACK 0x08 /* If set, the receiver is not
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* requested to send a `fack' PDU
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* for the fragment */
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#define PFCL1_MAYBE 0x10 /* If set, the PDU is for a `maybe'
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* request */
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#define PFCL1_IDEMPOTENT 0x20 /* If set, the PDU is for an idempotent
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* request */
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#define PFCL1_BROADCAST 0x40 /* If set, the PDU is for a broadcast
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* request */
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#define PFCL1_RESERVED_80 0x80 /* Reserved for use by implementations */
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/*
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* Flag bits in second flag field in connectionless PDU header.
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*/
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#define PFCL2_RESERVED_01 0x01 /* Reserved for use by implementations */
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#define PFCL2_CANCEL_PENDING 0x02 /* Cancel pending at the call end */
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#define PFCL2_RESERVED_04 0x04 /* Reserved for future use */
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#define PFCL2_RESERVED_08 0x08 /* Reserved for future use */
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#define PFCL2_RESERVED_10 0x10 /* Reserved for future use */
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#define PFCL2_RESERVED_20 0x20 /* Reserved for future use */
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#define PFCL2_RESERVED_40 0x40 /* Reserved for future use */
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#define PFCL2_RESERVED_80 0x80 /* Reserved for future use */
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/*
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* Flag bits in connection-oriented PDU header.
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*/
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#define PFC_FIRST_FRAG 0x01 /* First fragment */
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#define PFC_LAST_FRAG 0x02 /* Last fragment */
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#define PFC_PENDING_CANCEL 0x04 /* Cancel was pending at sender */
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#define PFC_RESERVED_1 0x08
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#define PFC_CONC_MPX 0x10 /* supports concurrent multiplexing
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* of a single connection. */
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#define PFC_DID_NOT_EXECUTE 0x20 /* only meaningful on `fault' packet;
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* if true, guaranteed call did not
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* execute. */
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#define PFC_MAYBE 0x40 /* `maybe' call semantics requested */
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#define PFC_OBJECT_UUID 0x80 /* if true, a non-nil object UUID
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* was specified in the handle, and
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* is present in the optional object
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* field. If false, the object field
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* is omitted. */
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/*
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* Tests whether a connection-oriented PDU is fragmented; returns TRUE if
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* it's not fragmented (i.e., this is both the first *and* last fragment),
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* and FALSE otherwise.
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*/
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#define PFC_NOT_FRAGMENTED(hdr) \
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((hdr->flags&(PFC_FIRST_FRAG|PFC_LAST_FRAG)) == (PFC_FIRST_FRAG|PFC_LAST_FRAG))
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/*
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* Presentation context negotiation result.
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*/
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static const value_string p_cont_result_vals[] = {
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{ 0, "Acceptance" },
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{ 1, "User rejection" },
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{ 2, "Provider rejection" },
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{ 3, "Negotiate ACK" }, /* [MS-RPCE] 2.2.2.4 */
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{ 0, NULL }
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};
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/*
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* Presentation context negotiation rejection reasons.
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*/
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static const value_string p_provider_reason_vals[] = {
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{ 0, "Reason not specified" },
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{ 1, "Abstract syntax not supported" },
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{ 2, "Proposed transfer syntaxes not supported" },
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{ 3, "Local limit exceeded" },
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{ 0, NULL }
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};
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/*
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* Reject reasons.
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*/
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#define REASON_NOT_SPECIFIED 0
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#define TEMPORARY_CONGESTION 1
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#define LOCAL_LIMIT_EXCEEDED 2
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#define CALLED_PADDR_UNKNOWN 3 /* not used */
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#define PROTOCOL_VERSION_NOT_SUPPORTED 4
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#define DEFAULT_CONTEXT_NOT_SUPPORTED 5 /* not used */
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#define USER_DATA_NOT_READABLE 6 /* not used */
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#define NO_PSAP_AVAILABLE 7 /* not used */
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#define AUTH_TYPE_NOT_RECOGNIZED 8 /* [MS-RPCE] 2.2.2.5 */
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#define INVALID_CHECKSUM 9 /* [MS-RPCE] 2.2.2.5 */
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static const value_string reject_reason_vals[] = {
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{ REASON_NOT_SPECIFIED, "Reason not specified" },
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{ TEMPORARY_CONGESTION, "Temporary congestion" },
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{ LOCAL_LIMIT_EXCEEDED, "Local limit exceeded" },
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{ CALLED_PADDR_UNKNOWN, "Called paddr unknown" },
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{ PROTOCOL_VERSION_NOT_SUPPORTED, "Protocol version not supported" },
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{ DEFAULT_CONTEXT_NOT_SUPPORTED, "Default context not supported" },
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{ USER_DATA_NOT_READABLE, "User data not readable" },
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{ NO_PSAP_AVAILABLE, "No PSAP available" },
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{ AUTH_TYPE_NOT_RECOGNIZED, "Authentication type not recognized" },
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{ INVALID_CHECKSUM, "Invalid checksum" },
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{ 0, NULL }
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};
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/*
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* Reject status codes.
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*/
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static const value_string reject_status_vals[] = {
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{ 0, "Stub-defined exception" },
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{ 0x00000001, "nca_s_fault_other" },
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{ 0x00000005, "nca_s_fault_access_denied" },
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{ 0x000006f7, "nca_s_fault_ndr" },
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{ 0x000006d8, "nca_s_fault_cant_perform" },
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{ 0x1c000001, "nca_s_fault_int_div_by_zero" },
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{ 0x1c000002, "nca_s_fault_addr_error" },
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{ 0x1c000003, "nca_s_fault_fp_div_zero" },
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{ 0x1c000004, "nca_s_fault_fp_underflow" },
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{ 0x1c000005, "nca_s_fault_fp_overflow" },
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{ 0x1c000006, "nca_s_fault_invalid_tag" },
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{ 0x1c000007, "nca_s_fault_invalid_bound" },
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{ 0x1c000008, "nca_rpc_version_mismatch" },
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{ 0x1c000009, "nca_unspec_reject" },
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{ 0x1c00000a, "nca_s_bad_actid" },
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{ 0x1c00000b, "nca_who_are_you_failed" },
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{ 0x1c00000c, "nca_manager_not_entered" },
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{ 0x1c00000d, "nca_s_fault_cancel" },
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{ 0x1c00000e, "nca_s_fault_ill_inst" },
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{ 0x1c00000f, "nca_s_fault_fp_error" },
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{ 0x1c000010, "nca_s_fault_int_overflow" },
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{ 0x1c000014, "nca_s_fault_pipe_empty" },
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{ 0x1c000015, "nca_s_fault_pipe_closed" },
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{ 0x1c000016, "nca_s_fault_pipe_order" },
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{ 0x1c000017, "nca_s_fault_pipe_discipline" },
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{ 0x1c000018, "nca_s_fault_pipe_comm_error" },
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{ 0x1c000019, "nca_s_fault_pipe_memory" },
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{ 0x1c00001a, "nca_s_fault_context_mismatch" },
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{ 0x1c00001b, "nca_s_fault_remote_no_memory" },
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{ 0x1c00001c, "nca_invalid_pres_context_id" },
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{ 0x1c00001d, "nca_unsupported_authn_level" },
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{ 0x1c00001f, "nca_invalid_checksum" },
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{ 0x1c000020, "nca_invalid_crc" },
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{ 0x1c000021, "ncs_s_fault_user_defined" },
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{ 0x1c000022, "nca_s_fault_tx_open_failed" },
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{ 0x1c000023, "nca_s_fault_codeset_conv_error" },
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{ 0x1c000024, "nca_s_fault_object_not_found" },
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{ 0x1c000025, "nca_s_fault_no_client_stub" },
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{ 0x1c010002, "nca_op_rng_error" },
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{ 0x1c010003, "nca_unk_if"},
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{ 0x1c010006, "nca_wrong_boot_time" },
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{ 0x1c010009, "nca_s_you_crashed" },
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{ 0x1c01000b, "nca_proto_error" },
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{ 0x1c010013, "nca_out_args_too_big" },
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{ 0x1c010014, "nca_server_too_busy" },
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{ 0x1c010017, "nca_unsupported_type" },
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/* MS Windows specific values
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* see: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/debug/base/system_error_codes__1700-3999_.asp
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* and: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/seccrypto/security/common_hresult_values.asp
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* and: http://www.megos.ch/support/doserrors.txt
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*
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* XXX - we might need a way to dynamically add entries here, as higher layer protocols use these values too,
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* at least MS protocols (like DCOM) do it that way ... */
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{ 0x80004001, "E_NOTIMPL" },
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{ 0x80004003, "E_POINTER" },
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{ 0x80004004, "E_ABORT" },
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{ 0x8000FFFF, "E_UNEXPECTED" },
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{ 0x80010105, "RPC_E_SERVERFAULT" },
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{ 0x80010108, "RPC_E_DISCONNECTED" },
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{ 0x80010113, "RPC_E_INVALID_IPID" },
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{ 0x8001011F, "RPC_E_TIMEOUT" },
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{ 0x80020003, "DISP_E_MEMBERNOTFOUND" },
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{ 0x80020006, "DISP_E_UNKNOWNNAME" },
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{ 0x8002000E, "DISP_E_BADPARAMCOUNT" },
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{ 0x8004CB00, "CBA_E_MALFORMED" },
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{ 0x8004CB01, "CBA_E_UNKNOWNOBJECT" },
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{ 0x8004CB05, "CBA_E_INVALIDID" },
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{ 0x8004CB09, "CBA_E_INVALIDCOOKIE" },
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{ 0x8004CB0B, "CBA_E_QOSTYPEUNSUPPORTED" },
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{ 0x8004CB0C, "CBA_E_QOSVALUEUNSUPPORTED" },
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{ 0x8004CB0F, "CBA_E_NOTAPPLICABLE" },
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{ 0x8004CB12, "CBA_E_LIMITVIOLATION" },
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{ 0x8004CB13, "CBA_E_QOSTYPENOTAPPLICABLE" },
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{ 0x8004CB18, "CBA_E_OUTOFPARTNERACCOS" },
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{ 0x8004CB1C, "CBA_E_FLAGUNSUPPORTED" },
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{ 0x8004CB23, "CBA_E_FRAMECOUNTUNSUPPORTED" },
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{ 0x8004CB25, "CBA_E_MODECHANGE" },
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{ 0x8007000E, "E_OUTOFMEMORY" },
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{ 0x80070057, "E_INVALIDARG" },
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{ 0x800706d1, "RPC_S_PROCNUM_OUT_OF_RANGE" },
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{ 0x80070776, "OR_INVALID_OXID" },
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{ 0, NULL }
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};
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/*
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* RTS Flags
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*/
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#define RTS_FLAG_NONE 0x0000
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#define RTS_FLAG_PING 0x0001
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#define RTS_FLAG_OTHER_CMD 0x0002
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#define RTS_FLAG_RECYCLE_CHANNEL 0x0004
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#define RTS_FLAG_IN_CHANNEL 0x0008
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#define RTS_FLAG_OUT_CHANNEL 0x0010
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#define RTS_FLAG_EOF 0x0020
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#define RTS_FLAG_ECHO 0x0040
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/*
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* RTS Commands
|
|
*/
|
|
|
|
#define RTS_CMD_RECEIVEWINDOWSIZE 0x0
|
|
#define RTS_CMD_FLOWCONTROLACK 0x1
|
|
#define RTS_CMD_CONNECTIONTIMEOUT 0x2
|
|
#define RTS_CMD_COOKIE 0x3
|
|
#define RTS_CMD_CHANNELLIFETIME 0x4
|
|
#define RTS_CMD_CLIENTKEEPALIVE 0x5
|
|
#define RTS_CMD_VERSION 0x6
|
|
#define RTS_CMD_EMPTY 0x7
|
|
#define RTS_CMD_PADDING 0x8
|
|
#define RTS_CMD_NEGATIVEANCE 0x9
|
|
#define RTS_CMD_ANCE 0xA
|
|
#define RTS_CMD_CLIENTADDRESS 0xB
|
|
#define RTS_CMD_ASSOCIATIONGROUPID 0xC
|
|
#define RTS_CMD_DESTINATION 0xD
|
|
#define RTS_CMD_PINGTRAFFICSENTNOTIFY 0xE
|
|
|
|
static const value_string rts_command_vals[] = {
|
|
{ RTS_CMD_RECEIVEWINDOWSIZE, "ReceiveWindowSize" },
|
|
{ RTS_CMD_FLOWCONTROLACK, "FlowControlAck" },
|
|
{ RTS_CMD_CONNECTIONTIMEOUT, "ConnectionTimeOut" },
|
|
{ RTS_CMD_COOKIE, "Cookie" },
|
|
{ RTS_CMD_CHANNELLIFETIME, "ChannelLifetime" },
|
|
{ RTS_CMD_CLIENTKEEPALIVE, "ClientKeepalive" },
|
|
{ RTS_CMD_VERSION, "Version" },
|
|
{ RTS_CMD_EMPTY, "Empty" },
|
|
{ RTS_CMD_PADDING, "Padding" },
|
|
{ RTS_CMD_NEGATIVEANCE, "NegativeANCE" },
|
|
{ RTS_CMD_ANCE, "ANCE" },
|
|
{ RTS_CMD_CLIENTADDRESS, "ClientAddress" },
|
|
{ RTS_CMD_ASSOCIATIONGROUPID, "AssociationGroupId" },
|
|
{ RTS_CMD_DESTINATION, "Destination" },
|
|
{ RTS_CMD_PINGTRAFFICSENTNOTIFY, "PingTrafficSentNotify" },
|
|
{ 0x0, NULL }
|
|
};
|
|
|
|
/*
|
|
* RTS client address type
|
|
*/
|
|
#define RTS_IPV4 0
|
|
#define RTS_IPV6 1
|
|
|
|
static const value_string rts_addresstype_vals[] = {
|
|
{ RTS_IPV4, "IPV4" },
|
|
{ RTS_IPV6, "IPV6" },
|
|
{ 0x0, NULL }
|
|
};
|
|
|
|
/*
|
|
* RTS Forward destination
|
|
*/
|
|
|
|
static const value_string rts_forward_destination_vals[] = {
|
|
{ 0x0, "FDClient" },
|
|
{ 0x1, "FDInProxy" },
|
|
{ 0x2, "FDServer" },
|
|
{ 0x3, "FDOutProxy" },
|
|
{ 0x0, NULL }
|
|
};
|
|
|
|
/* we need to keep track of what transport were used, ie what handle we came
|
|
* in through so we know what kind of pinfo->dce_smb_fid was passed to us.
|
|
*/
|
|
/* Value of -1 is reserved for "not DCE packet" in packet_info.dcetransporttype. */
|
|
#define DCE_TRANSPORT_UNKNOWN 0
|
|
#define DCE_CN_TRANSPORT_SMBPIPE 1
|
|
|
|
|
|
static int proto_dcerpc = -1;
|
|
|
|
/* field defines */
|
|
static int hf_dcerpc_request_in = -1;
|
|
static int hf_dcerpc_time = -1;
|
|
static int hf_dcerpc_response_in = -1;
|
|
static int hf_dcerpc_ver = -1;
|
|
static int hf_dcerpc_ver_minor = -1;
|
|
static int hf_dcerpc_packet_type = -1;
|
|
static int hf_dcerpc_cn_flags = -1;
|
|
static int hf_dcerpc_cn_flags_first_frag = -1;
|
|
static int hf_dcerpc_cn_flags_last_frag = -1;
|
|
static int hf_dcerpc_cn_flags_cancel_pending = -1;
|
|
static int hf_dcerpc_cn_flags_reserved = -1;
|
|
static int hf_dcerpc_cn_flags_mpx = -1;
|
|
static int hf_dcerpc_cn_flags_dne = -1;
|
|
static int hf_dcerpc_cn_flags_maybe = -1;
|
|
static int hf_dcerpc_cn_flags_object = -1;
|
|
static int hf_dcerpc_drep = -1;
|
|
int hf_dcerpc_drep_byteorder = -1;
|
|
int hf_dcerpc_ndr_padding = -1;
|
|
static int hf_dcerpc_drep_character = -1;
|
|
static int hf_dcerpc_drep_fp = -1;
|
|
static int hf_dcerpc_cn_frag_len = -1;
|
|
static int hf_dcerpc_cn_auth_len = -1;
|
|
static int hf_dcerpc_cn_call_id = -1;
|
|
static int hf_dcerpc_cn_max_xmit = -1;
|
|
static int hf_dcerpc_cn_max_recv = -1;
|
|
static int hf_dcerpc_cn_assoc_group = -1;
|
|
static int hf_dcerpc_cn_num_ctx_items = -1;
|
|
static int hf_dcerpc_cn_ctx_item = -1;
|
|
static int hf_dcerpc_cn_ctx_id = -1;
|
|
static int hf_dcerpc_cn_num_trans_items = -1;
|
|
static int hf_dcerpc_cn_bind_abstract_syntax = -1;
|
|
static int hf_dcerpc_cn_bind_if_id = -1;
|
|
static int hf_dcerpc_cn_bind_if_ver = -1;
|
|
static int hf_dcerpc_cn_bind_if_ver_minor = -1;
|
|
static int hf_dcerpc_cn_bind_trans_syntax = -1;
|
|
static int hf_dcerpc_cn_bind_trans_id = -1;
|
|
static int hf_dcerpc_cn_bind_trans_ver = -1;
|
|
static int hf_dcerpc_cn_bind_trans_btfn_01 = -1;
|
|
static int hf_dcerpc_cn_bind_trans_btfn_02 = -1;
|
|
static int hf_dcerpc_cn_alloc_hint = -1;
|
|
static int hf_dcerpc_cn_sec_addr_len = -1;
|
|
static int hf_dcerpc_cn_sec_addr = -1;
|
|
static int hf_dcerpc_cn_num_results = -1;
|
|
static int hf_dcerpc_cn_ack_result = -1;
|
|
static int hf_dcerpc_cn_ack_reason = -1;
|
|
static int hf_dcerpc_cn_ack_trans_id = -1;
|
|
static int hf_dcerpc_cn_ack_trans_ver = -1;
|
|
static int hf_dcerpc_cn_ack_btfn = -1;
|
|
static int hf_dcerpc_cn_reject_reason = -1;
|
|
static int hf_dcerpc_cn_num_protocols = -1;
|
|
static int hf_dcerpc_cn_protocol_ver_major = -1;
|
|
static int hf_dcerpc_cn_protocol_ver_minor = -1;
|
|
static int hf_dcerpc_cn_cancel_count = -1;
|
|
static int hf_dcerpc_cn_status = -1;
|
|
static int hf_dcerpc_cn_deseg_req = -1;
|
|
static int hf_dcerpc_cn_rts_flags = -1;
|
|
static int hf_dcerpc_cn_rts_flags_none = -1;
|
|
static int hf_dcerpc_cn_rts_flags_ping = -1;
|
|
static int hf_dcerpc_cn_rts_flags_other_cmd = -1;
|
|
static int hf_dcerpc_cn_rts_flags_recycle_channel = -1;
|
|
static int hf_dcerpc_cn_rts_flags_in_channel = -1;
|
|
static int hf_dcerpc_cn_rts_flags_out_channel = -1;
|
|
static int hf_dcerpc_cn_rts_flags_eof = -1;
|
|
static int hf_dcerpc_cn_rts_commands_nb = -1;
|
|
static int hf_dcerpc_cn_rts_command = -1;
|
|
static int hf_dcerpc_cn_rts_command_receivewindowsize = -1;
|
|
static int hf_dcerpc_cn_rts_command_fack_bytesreceived = -1;
|
|
static int hf_dcerpc_cn_rts_command_fack_availablewindow = -1;
|
|
static int hf_dcerpc_cn_rts_command_fack_channelcookie = -1;
|
|
static int hf_dcerpc_cn_rts_command_connectiontimeout = -1;
|
|
static int hf_dcerpc_cn_rts_command_cookie = -1;
|
|
static int hf_dcerpc_cn_rts_command_channellifetime = -1;
|
|
static int hf_dcerpc_cn_rts_command_clientkeepalive = -1;
|
|
static int hf_dcerpc_cn_rts_command_version = -1;
|
|
static int hf_dcerpc_cn_rts_command_conformancecount = -1;
|
|
static int hf_dcerpc_cn_rts_command_padding = -1;
|
|
static int hf_dcerpc_cn_rts_command_addrtype = -1;
|
|
static int hf_dcerpc_cn_rts_command_associationgroupid = -1;
|
|
static int hf_dcerpc_cn_rts_command_forwarddestination = -1;
|
|
static int hf_dcerpc_cn_rts_command_pingtrafficsentnotify = -1;
|
|
static int hf_dcerpc_auth_type = -1;
|
|
static int hf_dcerpc_auth_level = -1;
|
|
static int hf_dcerpc_auth_pad_len = -1;
|
|
static int hf_dcerpc_auth_rsrvd = -1;
|
|
static int hf_dcerpc_auth_ctx_id = -1;
|
|
static int hf_dcerpc_dg_flags1 = -1;
|
|
static int hf_dcerpc_dg_flags1_rsrvd_01 = -1;
|
|
static int hf_dcerpc_dg_flags1_last_frag = -1;
|
|
static int hf_dcerpc_dg_flags1_frag = -1;
|
|
static int hf_dcerpc_dg_flags1_nofack = -1;
|
|
static int hf_dcerpc_dg_flags1_maybe = -1;
|
|
static int hf_dcerpc_dg_flags1_idempotent = -1;
|
|
static int hf_dcerpc_dg_flags1_broadcast = -1;
|
|
static int hf_dcerpc_dg_flags1_rsrvd_80 = -1;
|
|
static int hf_dcerpc_dg_flags2 = -1;
|
|
static int hf_dcerpc_dg_flags2_rsrvd_01 = -1;
|
|
static int hf_dcerpc_dg_flags2_cancel_pending = -1;
|
|
static int hf_dcerpc_dg_flags2_rsrvd_04 = -1;
|
|
static int hf_dcerpc_dg_flags2_rsrvd_08 = -1;
|
|
static int hf_dcerpc_dg_flags2_rsrvd_10 = -1;
|
|
static int hf_dcerpc_dg_flags2_rsrvd_20 = -1;
|
|
static int hf_dcerpc_dg_flags2_rsrvd_40 = -1;
|
|
static int hf_dcerpc_dg_flags2_rsrvd_80 = -1;
|
|
static int hf_dcerpc_dg_serial_hi = -1;
|
|
static int hf_dcerpc_obj_id = -1;
|
|
static int hf_dcerpc_dg_if_id = -1;
|
|
static int hf_dcerpc_dg_act_id = -1;
|
|
static int hf_dcerpc_dg_serial_lo = -1;
|
|
static int hf_dcerpc_dg_ahint = -1;
|
|
static int hf_dcerpc_dg_ihint = -1;
|
|
static int hf_dcerpc_dg_frag_len = -1;
|
|
static int hf_dcerpc_dg_frag_num = -1;
|
|
static int hf_dcerpc_dg_auth_proto = -1;
|
|
static int hf_dcerpc_opnum = -1;
|
|
static int hf_dcerpc_dg_seqnum = -1;
|
|
static int hf_dcerpc_dg_server_boot = -1;
|
|
static int hf_dcerpc_dg_if_ver = -1;
|
|
static int hf_dcerpc_krb5_av_prot_level = -1;
|
|
static int hf_dcerpc_krb5_av_key_vers_num = -1;
|
|
static int hf_dcerpc_krb5_av_key_auth_verifier = -1;
|
|
static int hf_dcerpc_dg_cancel_vers = -1;
|
|
static int hf_dcerpc_dg_cancel_id = -1;
|
|
static int hf_dcerpc_dg_server_accepting_cancels = -1;
|
|
static int hf_dcerpc_dg_fack_vers = -1;
|
|
static int hf_dcerpc_dg_fack_window_size = -1;
|
|
static int hf_dcerpc_dg_fack_max_tsdu = -1;
|
|
static int hf_dcerpc_dg_fack_max_frag_size = -1;
|
|
static int hf_dcerpc_dg_fack_serial_num = -1;
|
|
static int hf_dcerpc_dg_fack_selack_len = -1;
|
|
static int hf_dcerpc_dg_fack_selack = -1;
|
|
static int hf_dcerpc_dg_status = -1;
|
|
static int hf_dcerpc_array_max_count = -1;
|
|
static int hf_dcerpc_array_offset = -1;
|
|
static int hf_dcerpc_array_actual_count = -1;
|
|
static int hf_dcerpc_op = -1;
|
|
static int hf_dcerpc_referent_id32 = -1;
|
|
static int hf_dcerpc_referent_id64 = -1;
|
|
static int hf_dcerpc_fragments = -1;
|
|
static int hf_dcerpc_fragment = -1;
|
|
static int hf_dcerpc_fragment_overlap = -1;
|
|
static int hf_dcerpc_fragment_overlap_conflict = -1;
|
|
static int hf_dcerpc_fragment_multiple_tails = -1;
|
|
static int hf_dcerpc_fragment_too_long_fragment = -1;
|
|
static int hf_dcerpc_fragment_error = -1;
|
|
static int hf_dcerpc_fragment_count = -1;
|
|
static int hf_dcerpc_reassembled_in = -1;
|
|
static int hf_dcerpc_reassembled_length = -1;
|
|
static int hf_dcerpc_unknown_if_id = -1;
|
|
|
|
static gint ett_dcerpc = -1;
|
|
static gint ett_dcerpc_cn_flags = -1;
|
|
static gint ett_dcerpc_cn_ctx = -1;
|
|
static gint ett_dcerpc_cn_iface = -1;
|
|
static gint ett_dcerpc_cn_trans_syntax = -1;
|
|
static gint ett_dcerpc_cn_trans_btfn = -1;
|
|
static gint ett_dcerpc_cn_rts_flags = -1;
|
|
static gint ett_dcerpc_cn_rts_command = -1;
|
|
static gint ett_dcerpc_cn_rts_pdu = -1;
|
|
static gint ett_dcerpc_drep = -1;
|
|
static gint ett_dcerpc_dg_flags1 = -1;
|
|
static gint ett_dcerpc_dg_flags2 = -1;
|
|
static gint ett_dcerpc_pointer_data = -1;
|
|
static gint ett_dcerpc_string = -1;
|
|
static gint ett_dcerpc_fragments = -1;
|
|
static gint ett_dcerpc_fragment = -1;
|
|
static gint ett_dcerpc_krb5_auth_verf = -1;
|
|
|
|
static expert_field ei_dcerpc_fragment_multiple = EI_INIT;
|
|
static expert_field ei_dcerpc_cn_status = EI_INIT;
|
|
static expert_field ei_dcerpc_fragment_reassembled = EI_INIT;
|
|
static expert_field ei_dcerpc_fragment = EI_INIT;
|
|
static expert_field ei_dcerpc_no_request_found = EI_INIT;
|
|
static expert_field ei_dcerpc_context_change = EI_INIT;
|
|
static expert_field ei_dcerpc_cn_ctx_id_no_bind = EI_INIT;
|
|
static expert_field ei_dcerpc_bind_not_acknowledged = EI_INIT;
|
|
static expert_field ei_dcerpc_verifier_unavailable = EI_INIT;
|
|
static expert_field ei_dcerpc_invalid_pdu_authentication_attempt = EI_INIT;
|
|
|
|
static GSList *decode_dcerpc_bindings = NULL;
|
|
/*
|
|
* To keep track of ctx_id mappings.
|
|
*
|
|
* Every time we see a bind call we update this table.
|
|
* Note that we always specify a SMB FID. For non-SMB transports this
|
|
* value is 0.
|
|
*/
|
|
static GHashTable *dcerpc_binds = NULL;
|
|
|
|
typedef struct _dcerpc_bind_key {
|
|
conversation_t *conv;
|
|
guint16 ctx_id;
|
|
guint64 transport_salt;
|
|
} dcerpc_bind_key;
|
|
|
|
typedef struct _dcerpc_bind_value {
|
|
e_guid_t uuid;
|
|
guint16 ver;
|
|
e_guid_t transport;
|
|
} dcerpc_bind_value;
|
|
|
|
/* Extra data for DCERPC handling and tracking of context ids */
|
|
typedef struct _dcerpc_decode_as_data {
|
|
guint16 dcectxid; /**< Context ID (DCERPC-specific) */
|
|
int dcetransporttype; /**< Transport type
|
|
* Value -1 means "not a DCERPC packet"
|
|
*/
|
|
guint64 dcetransportsalt; /**< fid: if transporttype==DCE_CN_TRANSPORT_SMBPIPE */
|
|
} dcerpc_decode_as_data;
|
|
|
|
static dcerpc_decode_as_data*
|
|
dcerpc_get_decode_data(packet_info* pinfo)
|
|
{
|
|
dcerpc_decode_as_data* data = (dcerpc_decode_as_data*)p_get_proto_data(pinfo->pool, pinfo, proto_dcerpc, 0);
|
|
if (data == NULL)
|
|
{
|
|
data = wmem_new0(pinfo->pool, dcerpc_decode_as_data);
|
|
data->dcetransporttype = -1;
|
|
p_add_proto_data(pinfo->pool, pinfo, proto_dcerpc, 0, data);
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
/**
|
|
* Registers a conversation/UUID binding association, so that
|
|
* we can invoke the proper sub-dissector for a given DCERPC
|
|
* conversation.
|
|
*
|
|
* @param binding all values needed to create and bind a new conversation
|
|
*
|
|
* @return Pointer to newly-added UUID/conversation binding.
|
|
*/
|
|
static struct _dcerpc_bind_value *
|
|
dcerpc_add_conv_to_bind_table(decode_dcerpc_bind_values_t *binding)
|
|
{
|
|
dcerpc_bind_value *bind_value;
|
|
dcerpc_bind_key *key;
|
|
conversation_t *conv;
|
|
|
|
conv = find_conversation(
|
|
0,
|
|
&binding->addr_a,
|
|
&binding->addr_b,
|
|
binding->ptype,
|
|
binding->port_a,
|
|
binding->port_b,
|
|
0);
|
|
|
|
if (!conv) {
|
|
conv = conversation_new(
|
|
0,
|
|
&binding->addr_a,
|
|
&binding->addr_b,
|
|
binding->ptype,
|
|
binding->port_a,
|
|
binding->port_b,
|
|
0);
|
|
}
|
|
|
|
bind_value = (dcerpc_bind_value *)wmem_alloc(wmem_file_scope(), sizeof (dcerpc_bind_value));
|
|
bind_value->uuid = binding->uuid;
|
|
bind_value->ver = binding->ver;
|
|
/* For now, assume all DCE/RPC we pick from "decode as" is using
|
|
standard ndr and not ndr64.
|
|
We should make this selectable from the dialog in the future
|
|
*/
|
|
bind_value->transport = uuid_data_repr_proto;
|
|
|
|
key = (dcerpc_bind_key *)wmem_alloc(wmem_file_scope(), sizeof (dcerpc_bind_key));
|
|
key->conv = conv;
|
|
key->ctx_id = binding->ctx_id;
|
|
key->transport_salt = binding->transport_salt;
|
|
|
|
/* add this entry to the bind table */
|
|
g_hash_table_insert(dcerpc_binds, key, bind_value);
|
|
|
|
return bind_value;
|
|
|
|
}
|
|
|
|
/* inject one of our bindings into the dcerpc binding table */
|
|
static void
|
|
decode_dcerpc_inject_binding(gpointer data, gpointer user_data _U_)
|
|
{
|
|
dcerpc_add_conv_to_bind_table((decode_dcerpc_bind_values_t *) data);
|
|
}
|
|
|
|
/* inject all of our bindings into the dcerpc binding table */
|
|
static void
|
|
decode_dcerpc_inject_bindings(void) {
|
|
g_slist_foreach(decode_dcerpc_bindings, decode_dcerpc_inject_binding, NULL /* user_data */);
|
|
}
|
|
|
|
/* free a binding */
|
|
static void
|
|
decode_dcerpc_binding_free(void *binding_in)
|
|
{
|
|
decode_dcerpc_bind_values_t *binding = (decode_dcerpc_bind_values_t *)binding_in;
|
|
|
|
g_free((void *) binding->addr_a.data);
|
|
g_free((void *) binding->addr_b.data);
|
|
if (binding->ifname)
|
|
g_string_free(binding->ifname, TRUE);
|
|
g_free(binding);
|
|
}
|
|
|
|
static void
|
|
dcerpc_decode_as_free(gpointer value)
|
|
{
|
|
decode_dcerpc_bind_values_t *binding = (decode_dcerpc_bind_values_t *)value;
|
|
if (binding != NULL)
|
|
decode_dcerpc_binding_free(binding);
|
|
}
|
|
|
|
/* removes all bindings */
|
|
void
|
|
decode_dcerpc_reset_all(void)
|
|
{
|
|
decode_dcerpc_bind_values_t *binding;
|
|
|
|
while (decode_dcerpc_bindings) {
|
|
binding = (decode_dcerpc_bind_values_t *)decode_dcerpc_bindings->data;
|
|
|
|
decode_dcerpc_binding_free(binding);
|
|
decode_dcerpc_bindings = g_slist_remove(
|
|
decode_dcerpc_bindings,
|
|
decode_dcerpc_bindings->data);
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
decode_dcerpc_add_show_list(decode_add_show_list_func func, gpointer user_data)
|
|
{
|
|
g_slist_foreach(decode_dcerpc_bindings, func, user_data);
|
|
}
|
|
|
|
static void
|
|
dcerpc_prompt(packet_info *pinfo, gchar* result)
|
|
{
|
|
GString *str = g_string_new("Replace binding between:\r\n"),
|
|
*address_str = g_string_new("");
|
|
dcerpc_decode_as_data* decode_data = dcerpc_get_decode_data(pinfo);
|
|
|
|
switch (pinfo->ptype) {
|
|
case(PT_TCP):
|
|
g_string_append(address_str, "Address: ToBeDone TCP port");
|
|
break;
|
|
case(PT_UDP):
|
|
g_string_append(address_str, "Address: ToBeDone UDP port");
|
|
break;
|
|
default:
|
|
g_string_append(address_str, "Address: ToBeDone Unknown port type");
|
|
}
|
|
|
|
g_string_append_printf(str, "%s: %u\r\n", address_str->str, pinfo->srcport);
|
|
g_string_append(str, "&\r\n");
|
|
g_string_append_printf(str, "%s: %u\r\n", address_str->str, pinfo->destport);
|
|
g_string_append_printf(str, "&\r\nContext ID: %u\r\n", decode_data->dcectxid);
|
|
g_string_append_printf(str, "&\r\nSMB FID: %"G_GINT64_MODIFIER"u\r\n",
|
|
dcerpc_get_transport_salt(pinfo));
|
|
g_string_append(str, "with:\r\n");
|
|
|
|
g_strlcpy(result, str->str, MAX_DECODE_AS_PROMPT_LEN);
|
|
g_string_free(str, TRUE);
|
|
g_string_free(address_str, TRUE);
|
|
}
|
|
|
|
static gpointer
|
|
dcerpc_value(packet_info *pinfo)
|
|
{
|
|
decode_dcerpc_bind_values_t *binding;
|
|
dcerpc_decode_as_data* decode_data = dcerpc_get_decode_data(pinfo);
|
|
|
|
/* clone binding */
|
|
binding = g_new(decode_dcerpc_bind_values_t,1);
|
|
COPY_ADDRESS(&binding->addr_a, &pinfo->src);
|
|
COPY_ADDRESS(&binding->addr_b, &pinfo->dst);
|
|
binding->ptype = pinfo->ptype;
|
|
binding->port_a = pinfo->srcport;
|
|
binding->port_b = pinfo->destport;
|
|
binding->ctx_id = decode_data->dcectxid;
|
|
binding->transport_salt = dcerpc_get_transport_salt(pinfo);
|
|
binding->ifname = NULL;
|
|
/*binding->uuid = NULL;*/
|
|
binding->ver = 0;
|
|
|
|
return binding;
|
|
}
|
|
|
|
struct dcerpc_decode_as_populate
|
|
{
|
|
decode_as_add_to_list_func add_to_list;
|
|
gpointer ui_element;
|
|
};
|
|
|
|
static void
|
|
decode_dcerpc_add_to_list(gpointer key, gpointer value, gpointer user_data)
|
|
{
|
|
struct dcerpc_decode_as_populate* populate = (struct dcerpc_decode_as_populate*)user_data;
|
|
|
|
/*dcerpc_uuid_key *k = key;*/
|
|
dcerpc_uuid_value *v = (dcerpc_uuid_value *)value;
|
|
|
|
if (strcmp(v->name, "(none)"))
|
|
populate->add_to_list("DCE-RPC", v->name, key, populate->ui_element);
|
|
}
|
|
|
|
static void
|
|
dcerpc_populate_list(const gchar *table_name _U_, decode_as_add_to_list_func add_to_list, gpointer ui_element)
|
|
{
|
|
struct dcerpc_decode_as_populate populate;
|
|
|
|
populate.add_to_list = add_to_list;
|
|
populate.ui_element = ui_element;
|
|
|
|
g_hash_table_foreach(dcerpc_uuids, decode_dcerpc_add_to_list, &populate);
|
|
}
|
|
|
|
/* compare two bindings (except the interface related things, e.g. uuid) */
|
|
static gint
|
|
decode_dcerpc_binding_cmp(gconstpointer a, gconstpointer b)
|
|
{
|
|
const decode_dcerpc_bind_values_t *binding_a = (const decode_dcerpc_bind_values_t *)a;
|
|
const decode_dcerpc_bind_values_t *binding_b = (const decode_dcerpc_bind_values_t *)b;
|
|
|
|
|
|
/* don't compare uuid and ver! */
|
|
if (
|
|
ADDRESSES_EQUAL(&binding_a->addr_a, &binding_b->addr_a) &&
|
|
ADDRESSES_EQUAL(&binding_a->addr_b, &binding_b->addr_b) &&
|
|
binding_a->ptype == binding_b->ptype &&
|
|
binding_a->port_a == binding_b->port_a &&
|
|
binding_a->port_b == binding_b->port_b &&
|
|
binding_a->ctx_id == binding_b->ctx_id &&
|
|
binding_a->transport_salt == binding_b->transport_salt)
|
|
{
|
|
/* equal */
|
|
return 0;
|
|
}
|
|
|
|
/* unequal */
|
|
return 1;
|
|
}
|
|
|
|
/* remove a binding (looking the same way as the given one) */
|
|
static gboolean
|
|
decode_dcerpc_binding_reset(const char *name _U_, const gpointer pattern)
|
|
{
|
|
decode_dcerpc_bind_values_t *binding = (decode_dcerpc_bind_values_t*)pattern;
|
|
GSList *le;
|
|
decode_dcerpc_bind_values_t *old_binding;
|
|
|
|
/* find the old binding (if it exists) */
|
|
le = g_slist_find_custom(decode_dcerpc_bindings,
|
|
binding,
|
|
decode_dcerpc_binding_cmp);
|
|
if (le == NULL)
|
|
return FALSE;
|
|
|
|
old_binding = (decode_dcerpc_bind_values_t *)le->data;
|
|
|
|
decode_dcerpc_bindings = g_slist_remove(decode_dcerpc_bindings, le->data);
|
|
|
|
g_free((void *) old_binding->addr_a.data);
|
|
g_free((void *) old_binding->addr_b.data);
|
|
g_string_free(old_binding->ifname, TRUE);
|
|
g_free(old_binding);
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
dcerpc_decode_as_change(const char *name, const gpointer pattern, gpointer handle, gchar* list_name)
|
|
{
|
|
decode_dcerpc_bind_values_t *binding = (decode_dcerpc_bind_values_t*)pattern;
|
|
decode_dcerpc_bind_values_t *stored_binding;
|
|
dcerpc_uuid_key *key = *((dcerpc_uuid_key**)handle);
|
|
|
|
|
|
binding->ifname = g_string_new(list_name);
|
|
binding->uuid = key->uuid;
|
|
binding->ver = key->ver;
|
|
|
|
/* remove a probably existing old binding */
|
|
decode_dcerpc_binding_reset(name, binding);
|
|
|
|
/* clone the new binding and append it to the list */
|
|
stored_binding = g_new(decode_dcerpc_bind_values_t,1);
|
|
*stored_binding = *binding;
|
|
COPY_ADDRESS(&stored_binding->addr_a, &binding->addr_a);
|
|
COPY_ADDRESS(&stored_binding->addr_b, &binding->addr_b);
|
|
stored_binding->ifname = g_string_new(binding->ifname->str);
|
|
|
|
decode_dcerpc_bindings = g_slist_append (decode_dcerpc_bindings, stored_binding);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static const fragment_items dcerpc_frag_items = {
|
|
&ett_dcerpc_fragments,
|
|
&ett_dcerpc_fragment,
|
|
|
|
&hf_dcerpc_fragments,
|
|
&hf_dcerpc_fragment,
|
|
&hf_dcerpc_fragment_overlap,
|
|
&hf_dcerpc_fragment_overlap_conflict,
|
|
&hf_dcerpc_fragment_multiple_tails,
|
|
&hf_dcerpc_fragment_too_long_fragment,
|
|
&hf_dcerpc_fragment_error,
|
|
&hf_dcerpc_fragment_count,
|
|
NULL,
|
|
&hf_dcerpc_reassembled_length,
|
|
/* Reassembled data field */
|
|
NULL,
|
|
"fragments"
|
|
};
|
|
|
|
/* list of hooks to be called when init_protocols is done */
|
|
GHookList dcerpc_hooks_init_protos;
|
|
|
|
/* try to desegment big DCE/RPC packets over TCP? */
|
|
static gboolean dcerpc_cn_desegment = TRUE;
|
|
|
|
/* reassemble DCE/RPC fragments */
|
|
/* reassembly of cl dcerpc fragments will not work for the case where ONE frame
|
|
might contain multiple dcerpc fragments for different PDUs.
|
|
this case would be so unusual/weird so if you got captures like that:
|
|
too bad
|
|
|
|
reassembly of co dcerpc fragments will not work for the case where TCP/SMB frames
|
|
are coming in out of sequence, but that will hurt in a lot of other places as well.
|
|
*/
|
|
static gboolean dcerpc_reassemble = TRUE;
|
|
static reassembly_table dcerpc_co_reassembly_table;
|
|
static reassembly_table dcerpc_cl_reassembly_table;
|
|
|
|
typedef struct _dcerpc_fragment_key {
|
|
address src;
|
|
address dst;
|
|
guint32 id;
|
|
e_guid_t act_id;
|
|
} dcerpc_fragment_key;
|
|
|
|
static guint
|
|
dcerpc_fragment_hash(gconstpointer k)
|
|
{
|
|
const dcerpc_fragment_key* key = (const dcerpc_fragment_key*) k;
|
|
guint hash_val;
|
|
|
|
hash_val = 0;
|
|
|
|
hash_val += key->id;
|
|
hash_val += key->act_id.data1;
|
|
hash_val += key->act_id.data2 << 16;
|
|
hash_val += key->act_id.data3;
|
|
|
|
return hash_val;
|
|
}
|
|
|
|
static gint
|
|
dcerpc_fragment_equal(gconstpointer k1, gconstpointer k2)
|
|
{
|
|
const dcerpc_fragment_key* key1 = (const dcerpc_fragment_key*) k1;
|
|
const dcerpc_fragment_key* key2 = (const dcerpc_fragment_key*) k2;
|
|
|
|
/*key.id is the first item to compare since item is most
|
|
likely to differ between sessions, thus shortcircuiting
|
|
the comparison of addresses.
|
|
*/
|
|
return (((key1->id == key2->id)
|
|
&& (ADDRESSES_EQUAL(&key1->src, &key2->src))
|
|
&& (ADDRESSES_EQUAL(&key1->dst, &key2->dst))
|
|
&& (memcmp (&key1->act_id, &key2->act_id, sizeof (e_guid_t)) == 0))
|
|
? TRUE : FALSE);
|
|
}
|
|
|
|
/* allocate a persistent dcerpc fragment key to insert in the hash */
|
|
static void *
|
|
dcerpc_fragment_temporary_key(const packet_info *pinfo, const guint32 id,
|
|
const void *data)
|
|
{
|
|
dcerpc_fragment_key *key = g_slice_new(dcerpc_fragment_key);
|
|
e_dce_dg_common_hdr_t *hdr = (e_dce_dg_common_hdr_t *)data;
|
|
|
|
key->src = pinfo->src;
|
|
key->dst = pinfo->dst;
|
|
key->id = id;
|
|
key->act_id = hdr->act_id;
|
|
|
|
return key;
|
|
}
|
|
|
|
/* allocate a persistent dcerpc fragment key to insert in the hash */
|
|
static void *
|
|
dcerpc_fragment_persistent_key(const packet_info *pinfo, const guint32 id,
|
|
const void *data)
|
|
{
|
|
dcerpc_fragment_key *key = g_slice_new(dcerpc_fragment_key);
|
|
e_dce_dg_common_hdr_t *hdr = (e_dce_dg_common_hdr_t *)data;
|
|
|
|
COPY_ADDRESS(&key->src, &pinfo->src);
|
|
COPY_ADDRESS(&key->dst, &pinfo->dst);
|
|
key->id = id;
|
|
key->act_id = hdr->act_id;
|
|
|
|
return key;
|
|
}
|
|
|
|
static void
|
|
dcerpc_fragment_free_temporary_key(gpointer ptr)
|
|
{
|
|
dcerpc_fragment_key *key = (dcerpc_fragment_key *)ptr;
|
|
|
|
if (key)
|
|
g_slice_free(dcerpc_fragment_key, key);
|
|
}
|
|
|
|
static void
|
|
dcerpc_fragment_free_persistent_key(gpointer ptr)
|
|
{
|
|
dcerpc_fragment_key *key = (dcerpc_fragment_key *)ptr;
|
|
|
|
if (key) {
|
|
/*
|
|
* Free up the copies of the addresses from the old key.
|
|
*/
|
|
g_free((gpointer)key->src.data);
|
|
g_free((gpointer)key->dst.data);
|
|
|
|
g_slice_free(dcerpc_fragment_key, key);
|
|
}
|
|
}
|
|
|
|
static const reassembly_table_functions dcerpc_cl_reassembly_table_functions = {
|
|
dcerpc_fragment_hash,
|
|
dcerpc_fragment_equal,
|
|
dcerpc_fragment_temporary_key,
|
|
dcerpc_fragment_persistent_key,
|
|
dcerpc_fragment_free_temporary_key,
|
|
dcerpc_fragment_free_persistent_key
|
|
};
|
|
|
|
static void
|
|
dcerpc_reassemble_init(void)
|
|
{
|
|
/*
|
|
* XXX - addresses_ports_reassembly_table_functions?
|
|
* Or can a single connection-oriented DCE RPC session persist
|
|
* over multiple transport layer connections?
|
|
*/
|
|
reassembly_table_init(&dcerpc_co_reassembly_table,
|
|
&addresses_reassembly_table_functions);
|
|
reassembly_table_init(&dcerpc_cl_reassembly_table,
|
|
&dcerpc_cl_reassembly_table_functions);
|
|
}
|
|
|
|
/*
|
|
* Authentication subdissectors. Used to dissect authentication blobs in
|
|
* DCERPC binds, requests and responses.
|
|
*/
|
|
|
|
typedef struct _dcerpc_auth_subdissector {
|
|
guint8 auth_level;
|
|
guint8 auth_type;
|
|
dcerpc_auth_subdissector_fns auth_fns;
|
|
} dcerpc_auth_subdissector;
|
|
|
|
static GSList *dcerpc_auth_subdissector_list;
|
|
|
|
static dcerpc_auth_subdissector_fns *get_auth_subdissector_fns(
|
|
guint8 auth_level, guint8 auth_type)
|
|
{
|
|
gpointer data;
|
|
int i;
|
|
|
|
for (i = 0; (data = g_slist_nth_data(dcerpc_auth_subdissector_list, i)); i++) {
|
|
dcerpc_auth_subdissector *asd = (dcerpc_auth_subdissector *)data;
|
|
|
|
if ((asd->auth_level == auth_level) &&
|
|
(asd->auth_type == auth_type))
|
|
return &asd->auth_fns;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void register_dcerpc_auth_subdissector(guint8 auth_level, guint8 auth_type,
|
|
dcerpc_auth_subdissector_fns *fns)
|
|
{
|
|
dcerpc_auth_subdissector *d;
|
|
|
|
if (get_auth_subdissector_fns(auth_level, auth_type))
|
|
return;
|
|
|
|
d = (dcerpc_auth_subdissector *)g_malloc(sizeof(dcerpc_auth_subdissector));
|
|
|
|
d->auth_level = auth_level;
|
|
d->auth_type = auth_type;
|
|
memcpy(&d->auth_fns, fns, sizeof(dcerpc_auth_subdissector_fns));
|
|
|
|
dcerpc_auth_subdissector_list = g_slist_append(dcerpc_auth_subdissector_list, d);
|
|
}
|
|
|
|
/* Hand off verifier data to a registered dissector */
|
|
|
|
static void dissect_auth_verf(tvbuff_t *auth_tvb, packet_info *pinfo,
|
|
proto_tree *tree,
|
|
dcerpc_auth_subdissector_fns *auth_fns,
|
|
e_dce_cn_common_hdr_t *hdr,
|
|
dcerpc_auth_info *auth_info)
|
|
{
|
|
dcerpc_dissect_fnct_t *volatile fn = NULL;
|
|
/* XXX - "stub" a fake DCERPC INFO STRUCTURE
|
|
If a dcerpc_info is really needed, update
|
|
the call stacks to include it
|
|
*/
|
|
FAKE_DCERPC_INFO_STRUCTURE
|
|
|
|
switch (hdr->ptype) {
|
|
case PDU_BIND:
|
|
case PDU_ALTER:
|
|
fn = auth_fns->bind_fn;
|
|
break;
|
|
case PDU_BIND_ACK:
|
|
case PDU_ALTER_ACK:
|
|
fn = auth_fns->bind_ack_fn;
|
|
break;
|
|
case PDU_AUTH3:
|
|
fn = auth_fns->auth3_fn;
|
|
break;
|
|
case PDU_REQ:
|
|
fn = auth_fns->req_verf_fn;
|
|
break;
|
|
case PDU_RESP:
|
|
fn = auth_fns->resp_verf_fn;
|
|
break;
|
|
|
|
default:
|
|
/* Don't know how to handle authentication data in this
|
|
pdu type. */
|
|
proto_tree_add_expert_format(tree, pinfo, &ei_dcerpc_invalid_pdu_authentication_attempt,
|
|
auth_tvb, 0, 0,
|
|
"Don't know how to dissect authentication data for %s pdu type",
|
|
val_to_str(hdr->ptype, pckt_vals, "Unknown (%u)"));
|
|
return;
|
|
break;
|
|
}
|
|
|
|
if (fn)
|
|
fn(auth_tvb, 0, pinfo, tree, &di, hdr->drep);
|
|
else {
|
|
proto_tree_add_expert_format(tree, pinfo, &ei_dcerpc_verifier_unavailable,
|
|
auth_tvb, 0, hdr->auth_len,
|
|
"%s Verifier unavailable",
|
|
val_to_str(auth_info->auth_type,
|
|
authn_protocol_vals,
|
|
"Unknown (%u)"));
|
|
}
|
|
}
|
|
|
|
/* Hand off payload data to a registered dissector */
|
|
|
|
static tvbuff_t *decode_encrypted_data(tvbuff_t *data_tvb,
|
|
tvbuff_t *auth_tvb,
|
|
packet_info *pinfo,
|
|
dcerpc_auth_subdissector_fns *auth_fns,
|
|
gboolean is_request,
|
|
dcerpc_auth_info *auth_info)
|
|
{
|
|
dcerpc_decode_data_fnct_t *fn;
|
|
|
|
if (is_request)
|
|
fn = auth_fns->req_data_fn;
|
|
else
|
|
fn = auth_fns->resp_data_fn;
|
|
|
|
if (fn)
|
|
return fn(data_tvb, auth_tvb, 0, pinfo, auth_info);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Subdissectors
|
|
*/
|
|
|
|
/* the registered subdissectors */
|
|
GHashTable *dcerpc_uuids = NULL;
|
|
|
|
static gint
|
|
dcerpc_uuid_equal(gconstpointer k1, gconstpointer k2)
|
|
{
|
|
const dcerpc_uuid_key *key1 = (const dcerpc_uuid_key *)k1;
|
|
const dcerpc_uuid_key *key2 = (const dcerpc_uuid_key *)k2;
|
|
return ((memcmp(&key1->uuid, &key2->uuid, sizeof (e_guid_t)) == 0)
|
|
&& (key1->ver == key2->ver));
|
|
}
|
|
|
|
static guint
|
|
dcerpc_uuid_hash(gconstpointer k)
|
|
{
|
|
const dcerpc_uuid_key *key = (const dcerpc_uuid_key *)k;
|
|
/* This isn't perfect, but the Data1 part of these is almost always
|
|
unique. */
|
|
return key->uuid.data1;
|
|
}
|
|
|
|
void
|
|
dcerpc_init_uuid(int proto, int ett, e_guid_t *uuid, guint16 ver,
|
|
dcerpc_sub_dissector *procs, int opnum_hf)
|
|
{
|
|
dcerpc_uuid_key *key = (dcerpc_uuid_key *)g_malloc(sizeof (*key));
|
|
dcerpc_uuid_value *value = (dcerpc_uuid_value *)g_malloc(sizeof (*value));
|
|
header_field_info *hf_info;
|
|
module_t *samr_module;
|
|
const char *filter_name = proto_get_protocol_filter_name(proto);
|
|
|
|
key->uuid = *uuid;
|
|
key->ver = ver;
|
|
|
|
value->proto = find_protocol_by_id(proto);
|
|
value->proto_id = proto;
|
|
value->ett = ett;
|
|
value->name = proto_get_protocol_short_name(value->proto);
|
|
value->procs = procs;
|
|
value->opnum_hf = opnum_hf;
|
|
|
|
g_hash_table_insert(dcerpc_uuids, key, value);
|
|
|
|
hf_info = proto_registrar_get_nth(opnum_hf);
|
|
hf_info->strings = value_string_from_subdissectors(procs);
|
|
|
|
/* add this GUID to the global name resolving */
|
|
guids_add_uuid(uuid, proto_get_protocol_short_name(value->proto));
|
|
|
|
/* Register the samr.nt_password preference as obsolete */
|
|
/* This should be in packet-dcerpc-samr.c */
|
|
if (strcmp(filter_name, "samr") == 0) {
|
|
samr_module = prefs_register_protocol(proto, NULL);
|
|
prefs_register_obsolete_preference(samr_module, "nt_password");
|
|
}
|
|
}
|
|
|
|
/* Function to find the name of a registered protocol
|
|
* or NULL if the protocol/version is not known to wireshark.
|
|
*/
|
|
const char *
|
|
dcerpc_get_proto_name(e_guid_t *uuid, guint16 ver)
|
|
{
|
|
dcerpc_uuid_key key;
|
|
dcerpc_uuid_value *sub_proto;
|
|
|
|
key.uuid = *uuid;
|
|
key.ver = ver;
|
|
if (!(sub_proto = (dcerpc_uuid_value *)g_hash_table_lookup(dcerpc_uuids, &key))) {
|
|
return NULL;
|
|
}
|
|
return sub_proto->name;
|
|
}
|
|
|
|
/* Function to find the opnum hf-field of a registered protocol
|
|
* or -1 if the protocol/version is not known to wireshark.
|
|
*/
|
|
int
|
|
dcerpc_get_proto_hf_opnum(e_guid_t *uuid, guint16 ver)
|
|
{
|
|
dcerpc_uuid_key key;
|
|
dcerpc_uuid_value *sub_proto;
|
|
|
|
key.uuid = *uuid;
|
|
key.ver = ver;
|
|
if (!(sub_proto = (dcerpc_uuid_value *)g_hash_table_lookup(dcerpc_uuids, &key))) {
|
|
return -1;
|
|
}
|
|
return sub_proto->opnum_hf;
|
|
}
|
|
|
|
/* Create a value_string consisting of DCERPC opnum and name from a
|
|
subdissector array. */
|
|
|
|
value_string *value_string_from_subdissectors(dcerpc_sub_dissector *sd)
|
|
{
|
|
value_string *vs = NULL;
|
|
int i;
|
|
int num_sd = 0;
|
|
|
|
again:
|
|
for (i = 0; sd[i].name; i++) {
|
|
if (vs) {
|
|
vs[i].value = sd[i].num;
|
|
vs[i].strptr = sd[i].name;
|
|
} else
|
|
num_sd++;
|
|
}
|
|
|
|
if (!vs) {
|
|
vs = (value_string *)wmem_alloc(wmem_epan_scope(), (num_sd + 1) * sizeof(value_string));
|
|
goto again;
|
|
}
|
|
|
|
vs[num_sd].value = 0;
|
|
vs[num_sd].strptr = NULL;
|
|
|
|
return vs;
|
|
}
|
|
|
|
/* Function to find the subdissector table of a registered protocol
|
|
* or NULL if the protocol/version is not known to wireshark.
|
|
*/
|
|
dcerpc_sub_dissector *
|
|
dcerpc_get_proto_sub_dissector(e_guid_t *uuid, guint16 ver)
|
|
{
|
|
dcerpc_uuid_key key;
|
|
dcerpc_uuid_value *sub_proto;
|
|
|
|
key.uuid = *uuid;
|
|
key.ver = ver;
|
|
if (!(sub_proto = (dcerpc_uuid_value *)g_hash_table_lookup(dcerpc_uuids, &key))) {
|
|
return NULL;
|
|
}
|
|
return sub_proto->procs;
|
|
}
|
|
|
|
|
|
|
|
static gint
|
|
dcerpc_bind_equal(gconstpointer k1, gconstpointer k2)
|
|
{
|
|
const dcerpc_bind_key *key1 = (const dcerpc_bind_key *)k1;
|
|
const dcerpc_bind_key *key2 = (const dcerpc_bind_key *)k2;
|
|
return ((key1->conv == key2->conv)
|
|
&& (key1->ctx_id == key2->ctx_id)
|
|
&& (key1->transport_salt == key2->transport_salt));
|
|
}
|
|
|
|
static guint
|
|
dcerpc_bind_hash(gconstpointer k)
|
|
{
|
|
const dcerpc_bind_key *key = (const dcerpc_bind_key *)k;
|
|
guint hash;
|
|
|
|
hash = GPOINTER_TO_UINT(key->conv);
|
|
hash += key->ctx_id;
|
|
/* sizeof(guint) might be smaller than sizeof(guint64) */
|
|
hash += (guint)key->transport_salt;
|
|
hash += (guint)(key->transport_salt << sizeof(guint));
|
|
|
|
return hash;
|
|
}
|
|
|
|
/*
|
|
* To keep track of callid mappings. Should really use some generic
|
|
* conversation support instead.
|
|
*/
|
|
static GHashTable *dcerpc_cn_calls = NULL;
|
|
static GHashTable *dcerpc_dg_calls = NULL;
|
|
|
|
typedef struct _dcerpc_cn_call_key {
|
|
conversation_t *conv;
|
|
guint32 call_id;
|
|
guint64 transport_salt;
|
|
} dcerpc_cn_call_key;
|
|
|
|
typedef struct _dcerpc_dg_call_key {
|
|
conversation_t *conv;
|
|
guint32 seqnum;
|
|
e_guid_t act_id ;
|
|
} dcerpc_dg_call_key;
|
|
|
|
|
|
static gint
|
|
dcerpc_cn_call_equal(gconstpointer k1, gconstpointer k2)
|
|
{
|
|
const dcerpc_cn_call_key *key1 = (const dcerpc_cn_call_key *)k1;
|
|
const dcerpc_cn_call_key *key2 = (const dcerpc_cn_call_key *)k2;
|
|
return ((key1->conv == key2->conv)
|
|
&& (key1->call_id == key2->call_id)
|
|
&& (key1->transport_salt == key2->transport_salt));
|
|
}
|
|
|
|
static gint
|
|
dcerpc_dg_call_equal(gconstpointer k1, gconstpointer k2)
|
|
{
|
|
const dcerpc_dg_call_key *key1 = (const dcerpc_dg_call_key *)k1;
|
|
const dcerpc_dg_call_key *key2 = (const dcerpc_dg_call_key *)k2;
|
|
return ((key1->conv == key2->conv)
|
|
&& (key1->seqnum == key2->seqnum)
|
|
&& ((memcmp(&key1->act_id, &key2->act_id, sizeof (e_guid_t)) == 0)));
|
|
}
|
|
|
|
static guint
|
|
dcerpc_cn_call_hash(gconstpointer k)
|
|
{
|
|
const dcerpc_cn_call_key *key = (const dcerpc_cn_call_key *)k;
|
|
guint hash;
|
|
|
|
hash = GPOINTER_TO_UINT(key->conv);
|
|
hash += key->call_id;
|
|
/* sizeof(guint) might be smaller than sizeof(guint64) */
|
|
hash += (guint)key->transport_salt;
|
|
hash += (guint)(key->transport_salt << sizeof(guint));
|
|
|
|
return hash;
|
|
}
|
|
|
|
static guint
|
|
dcerpc_dg_call_hash(gconstpointer k)
|
|
{
|
|
const dcerpc_dg_call_key *key = (const dcerpc_dg_call_key *)k;
|
|
return (GPOINTER_TO_UINT(key->conv) + key->seqnum + key->act_id.data1
|
|
+ (key->act_id.data2 << 16) + key->act_id.data3
|
|
+ (key->act_id.data4[0] << 24) + (key->act_id.data4[1] << 16)
|
|
+ (key->act_id.data4[2] << 8) + (key->act_id.data4[3] << 0)
|
|
+ (key->act_id.data4[4] << 24) + (key->act_id.data4[5] << 16)
|
|
+ (key->act_id.data4[6] << 8) + (key->act_id.data4[7] << 0));
|
|
}
|
|
|
|
/* to keep track of matched calls/responses
|
|
this one uses the same value struct as calls, but the key is the frame id
|
|
and call id; there can be more than one call in a frame.
|
|
|
|
XXX - why not just use the same keys as are used for calls?
|
|
*/
|
|
|
|
static GHashTable *dcerpc_matched = NULL;
|
|
|
|
typedef struct _dcerpc_matched_key {
|
|
guint32 frame;
|
|
guint32 call_id;
|
|
} dcerpc_matched_key;
|
|
|
|
static gint
|
|
dcerpc_matched_equal(gconstpointer k1, gconstpointer k2)
|
|
{
|
|
const dcerpc_matched_key *key1 = (const dcerpc_matched_key *)k1;
|
|
const dcerpc_matched_key *key2 = (const dcerpc_matched_key *)k2;
|
|
return ((key1->frame == key2->frame)
|
|
&& (key1->call_id == key2->call_id));
|
|
}
|
|
|
|
static guint
|
|
dcerpc_matched_hash(gconstpointer k)
|
|
{
|
|
const dcerpc_matched_key *key = (const dcerpc_matched_key *)k;
|
|
return key->frame;
|
|
}
|
|
|
|
static gboolean
|
|
uuid_equal(e_guid_t *uuid1, e_guid_t *uuid2)
|
|
{
|
|
if( (uuid1->data1 != uuid2->data1)
|
|
||(uuid1->data2 != uuid2->data2)
|
|
||(uuid1->data3 != uuid2->data3)
|
|
||(uuid1->data4[0] != uuid2->data4[0])
|
|
||(uuid1->data4[1] != uuid2->data4[1])
|
|
||(uuid1->data4[2] != uuid2->data4[2])
|
|
||(uuid1->data4[3] != uuid2->data4[3])
|
|
||(uuid1->data4[4] != uuid2->data4[4])
|
|
||(uuid1->data4[5] != uuid2->data4[5])
|
|
||(uuid1->data4[6] != uuid2->data4[6])
|
|
||(uuid1->data4[7] != uuid2->data4[7]) ){
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
dcerpcstat_init(struct register_srt* srt, GArray* srt_array, srt_gui_init_cb gui_callback, void* gui_data)
|
|
{
|
|
dcerpcstat_tap_data_t* tap_data = (dcerpcstat_tap_data_t*)get_srt_table_param_data(srt);
|
|
srt_stat_table *dcerpc_srt_table;
|
|
int i, hf_opnum;
|
|
dcerpc_sub_dissector *procs;
|
|
|
|
DISSECTOR_ASSERT(tap_data);
|
|
|
|
hf_opnum = dcerpc_get_proto_hf_opnum(&tap_data->uuid, tap_data->ver);
|
|
procs = dcerpc_get_proto_sub_dissector(&tap_data->uuid, tap_data->ver);
|
|
|
|
if(hf_opnum != -1){
|
|
dcerpc_srt_table = init_srt_table(tap_data->prog, NULL, srt_array, tap_data->num_procedures, NULL, proto_registrar_get_nth(hf_opnum)->abbrev, gui_callback, gui_data, tap_data);
|
|
} else {
|
|
dcerpc_srt_table = init_srt_table(tap_data->prog, NULL, srt_array, tap_data->num_procedures, NULL, NULL, gui_callback, gui_data, tap_data);
|
|
}
|
|
|
|
for(i=0;i<tap_data->num_procedures;i++){
|
|
int j;
|
|
const char *proc_name;
|
|
|
|
proc_name = "unknown";
|
|
for(j=0;procs[j].name;j++)
|
|
{
|
|
if (procs[j].num == i)
|
|
{
|
|
proc_name = procs[j].name;
|
|
}
|
|
}
|
|
|
|
init_srt_table_row(dcerpc_srt_table, i, proc_name);
|
|
}
|
|
}
|
|
|
|
static int
|
|
dcerpcstat_packet(void *pss, packet_info *pinfo, epan_dissect_t *edt _U_, const void *prv)
|
|
{
|
|
guint i = 0;
|
|
srt_stat_table *dcerpc_srt_table;
|
|
srt_data_t *data = (srt_data_t *)pss;
|
|
const dcerpc_info *ri = (dcerpc_info *)prv;
|
|
dcerpcstat_tap_data_t* tap_data;
|
|
|
|
dcerpc_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
|
|
tap_data = (dcerpcstat_tap_data_t*)dcerpc_srt_table->table_specific_data;
|
|
|
|
if(!ri->call_data){
|
|
return 0;
|
|
}
|
|
if(!ri->call_data->req_frame){
|
|
/* we have not seen the request so we don't know the delta*/
|
|
return 0;
|
|
}
|
|
if(ri->call_data->opnum >= tap_data->num_procedures){
|
|
/* don't handle this since it's outside of known table */
|
|
return 0;
|
|
}
|
|
|
|
/* we are only interested in reply packets */
|
|
if(ri->ptype != PDU_RESP){
|
|
return 0;
|
|
}
|
|
|
|
/* we are only interested in certain program/versions */
|
|
if( (!uuid_equal( (&ri->call_data->uuid), (&tap_data->uuid)))
|
|
||(ri->call_data->ver != tap_data->ver)){
|
|
return 0;
|
|
}
|
|
|
|
add_srt_table_data(dcerpc_srt_table, ri->call_data->opnum, &ri->call_data->req_time, pinfo);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static guint
|
|
dcerpcstat_param(register_srt_t* srt, const char* opt_arg, char** err)
|
|
{
|
|
guint pos = 0;
|
|
guint32 i, max_procs;
|
|
dcerpcstat_tap_data_t* tap_data;
|
|
guint d1,d2,d3,d40,d41,d42,d43,d44,d45,d46,d47;
|
|
int major, minor;
|
|
guint16 ver;
|
|
dcerpc_sub_dissector *procs;
|
|
|
|
if (sscanf(opt_arg, ",%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x,%d.%d%n",
|
|
&d1,&d2,&d3,&d40,&d41,&d42,&d43,&d44,&d45,&d46,&d47,&major,&minor,&pos) == 13)
|
|
{
|
|
if ((major < 0) || (major > 65535)) {
|
|
*err = g_strdup_printf("dcerpcstat_init() Major version number %d is invalid - must be positive and <= 65535", major);
|
|
return pos;
|
|
}
|
|
if ((minor < 0) || (minor > 65535)) {
|
|
*err = g_strdup_printf("dcerpcstat_init() Minor version number %d is invalid - must be positive and <= 65535", minor);
|
|
return pos;
|
|
}
|
|
ver = major;
|
|
|
|
tap_data = g_new0(dcerpcstat_tap_data_t, 1);
|
|
|
|
tap_data->uuid.data1 = d1;
|
|
tap_data->uuid.data2 = d2;
|
|
tap_data->uuid.data3 = d3;
|
|
tap_data->uuid.data4[0] = d40;
|
|
tap_data->uuid.data4[1] = d41;
|
|
tap_data->uuid.data4[2] = d42;
|
|
tap_data->uuid.data4[3] = d43;
|
|
tap_data->uuid.data4[4] = d44;
|
|
tap_data->uuid.data4[5] = d45;
|
|
tap_data->uuid.data4[6] = d46;
|
|
tap_data->uuid.data4[7] = d47;
|
|
|
|
procs = dcerpc_get_proto_sub_dissector(&tap_data->uuid, ver);
|
|
tap_data->prog = dcerpc_get_proto_name(&tap_data->uuid, ver);
|
|
tap_data->ver = ver;
|
|
|
|
for(i=0,max_procs=0;procs[i].name;i++)
|
|
{
|
|
if(procs[i].num>max_procs)
|
|
{
|
|
max_procs = procs[i].num;
|
|
}
|
|
}
|
|
tap_data->num_procedures = max_procs+1;
|
|
|
|
set_srt_table_param_data(srt, tap_data);
|
|
}
|
|
else
|
|
{
|
|
*err = g_strdup_printf("<uuid>,<major version>.<minor version>[,<filter>]");
|
|
}
|
|
|
|
return pos;
|
|
}
|
|
|
|
|
|
/*
|
|
* Utility functions. Modeled after packet-rpc.c
|
|
*/
|
|
|
|
int
|
|
dissect_dcerpc_uint8(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, guint8 *drep,
|
|
int hfindex, guint8 *pdata)
|
|
{
|
|
guint8 data;
|
|
|
|
data = tvb_get_guint8(tvb, offset);
|
|
if (tree && hfindex != -1) {
|
|
proto_tree_add_item(tree, hfindex, tvb, offset, 1, DREP_ENC_INTEGER(drep));
|
|
}
|
|
if (pdata)
|
|
*pdata = data;
|
|
return offset + 1;
|
|
}
|
|
|
|
int
|
|
dissect_dcerpc_uint16(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, guint8 *drep,
|
|
int hfindex, guint16 *pdata)
|
|
{
|
|
guint16 data;
|
|
|
|
data = ((drep[0] & DREP_LITTLE_ENDIAN)
|
|
? tvb_get_letohs(tvb, offset)
|
|
: tvb_get_ntohs(tvb, offset));
|
|
|
|
if (tree && hfindex != -1) {
|
|
proto_tree_add_item(tree, hfindex, tvb, offset, 2, DREP_ENC_INTEGER(drep));
|
|
}
|
|
if (pdata)
|
|
*pdata = data;
|
|
return offset + 2;
|
|
}
|
|
|
|
int
|
|
dissect_dcerpc_uint32(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, guint8 *drep,
|
|
int hfindex, guint32 *pdata)
|
|
{
|
|
guint32 data;
|
|
|
|
data = ((drep[0] & DREP_LITTLE_ENDIAN)
|
|
? tvb_get_letohl(tvb, offset)
|
|
: tvb_get_ntohl(tvb, offset));
|
|
|
|
if (tree && hfindex != -1) {
|
|
proto_tree_add_item(tree, hfindex, tvb, offset, 4, DREP_ENC_INTEGER(drep));
|
|
}
|
|
if (pdata)
|
|
*pdata = data;
|
|
return offset+4;
|
|
}
|
|
|
|
/* handles 32 bit unix time_t */
|
|
int
|
|
dissect_dcerpc_time_t(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, guint8 *drep,
|
|
int hfindex, guint32 *pdata)
|
|
{
|
|
guint32 data;
|
|
nstime_t tv;
|
|
|
|
data = ((drep[0] & DREP_LITTLE_ENDIAN)
|
|
? tvb_get_letohl(tvb, offset)
|
|
: tvb_get_ntohl(tvb, offset));
|
|
|
|
tv.secs = data;
|
|
tv.nsecs = 0;
|
|
if (tree && hfindex != -1) {
|
|
if (data == 0xffffffff) {
|
|
/* special case, no time specified */
|
|
proto_tree_add_time_format_value(tree, hfindex, tvb, offset, 4, &tv, "No time specified");
|
|
} else {
|
|
proto_tree_add_time(tree, hfindex, tvb, offset, 4, &tv);
|
|
}
|
|
}
|
|
if (pdata)
|
|
*pdata = data;
|
|
|
|
return offset+4;
|
|
}
|
|
|
|
int
|
|
dissect_dcerpc_uint64(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep,
|
|
int hfindex, guint64 *pdata)
|
|
{
|
|
guint64 data;
|
|
|
|
data = ((drep[0] & DREP_LITTLE_ENDIAN)
|
|
? tvb_get_letoh64(tvb, offset)
|
|
: tvb_get_ntoh64(tvb, offset));
|
|
|
|
if (tree && hfindex != -1) {
|
|
header_field_info *hfinfo;
|
|
|
|
/* This might be a field that is either 32bit, in NDR or
|
|
64 bits in NDR64. So we must be careful and call the right
|
|
helper here
|
|
*/
|
|
hfinfo = proto_registrar_get_nth(hfindex);
|
|
|
|
switch (hfinfo->type) {
|
|
case FT_UINT64:
|
|
proto_tree_add_uint64(tree, hfindex, tvb, offset, 8, data);
|
|
break;
|
|
case FT_INT64:
|
|
proto_tree_add_int64(tree, hfindex, tvb, offset, 8, data);
|
|
break;
|
|
default:
|
|
/* The value is truncated to 32bits. 64bit values have only been
|
|
seen on fuzz-tested files */
|
|
DISSECTOR_ASSERT((di->call_data->flags & DCERPC_IS_NDR64) || (data <= G_MAXUINT32));
|
|
proto_tree_add_uint(tree, hfindex, tvb, offset, 8, (guint32)data);
|
|
}
|
|
}
|
|
if (pdata)
|
|
*pdata = data;
|
|
return offset+8;
|
|
}
|
|
|
|
|
|
int
|
|
dissect_dcerpc_float(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, guint8 *drep,
|
|
int hfindex, gfloat *pdata)
|
|
{
|
|
gfloat data;
|
|
|
|
|
|
switch (drep[1]) {
|
|
case(DCE_RPC_DREP_FP_IEEE):
|
|
data = ((drep[0] & DREP_LITTLE_ENDIAN)
|
|
? tvb_get_letohieee_float(tvb, offset)
|
|
: tvb_get_ntohieee_float(tvb, offset));
|
|
if (tree && hfindex != -1) {
|
|
proto_tree_add_float(tree, hfindex, tvb, offset, 4, data);
|
|
}
|
|
break;
|
|
case(DCE_RPC_DREP_FP_VAX): /* (fall trough) */
|
|
case(DCE_RPC_DREP_FP_CRAY): /* (fall trough) */
|
|
case(DCE_RPC_DREP_FP_IBM): /* (fall trough) */
|
|
default:
|
|
/* ToBeDone: non IEEE floating formats */
|
|
/* Set data to a negative infinity value */
|
|
data = -G_MAXFLOAT;
|
|
if (tree && hfindex != -1) {
|
|
proto_tree_add_debug_text(tree, "DCE RPC: dissection of non IEEE floating formats currently not implemented (drep=%u)!", drep[1]);
|
|
}
|
|
}
|
|
if (pdata)
|
|
*pdata = data;
|
|
return offset + 4;
|
|
}
|
|
|
|
|
|
int
|
|
dissect_dcerpc_double(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, guint8 *drep,
|
|
int hfindex, gdouble *pdata)
|
|
{
|
|
gdouble data;
|
|
|
|
|
|
switch (drep[1]) {
|
|
case(DCE_RPC_DREP_FP_IEEE):
|
|
data = ((drep[0] & DREP_LITTLE_ENDIAN)
|
|
? tvb_get_letohieee_double(tvb, offset)
|
|
: tvb_get_ntohieee_double(tvb, offset));
|
|
if (tree && hfindex != -1) {
|
|
proto_tree_add_double(tree, hfindex, tvb, offset, 8, data);
|
|
}
|
|
break;
|
|
case(DCE_RPC_DREP_FP_VAX): /* (fall trough) */
|
|
case(DCE_RPC_DREP_FP_CRAY): /* (fall trough) */
|
|
case(DCE_RPC_DREP_FP_IBM): /* (fall trough) */
|
|
default:
|
|
/* ToBeDone: non IEEE double formats */
|
|
/* Set data to a negative infinity value */
|
|
data = -G_MAXDOUBLE;
|
|
if (tree && hfindex != -1) {
|
|
proto_tree_add_debug_text(tree, "DCE RPC: dissection of non IEEE double formats currently not implemented (drep=%u)!", drep[1]);
|
|
}
|
|
}
|
|
if (pdata)
|
|
*pdata = data;
|
|
return offset + 8;
|
|
}
|
|
|
|
|
|
int
|
|
dissect_dcerpc_uuid_t(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
|
|
proto_tree *tree, guint8 *drep,
|
|
int hfindex, e_guid_t *pdata)
|
|
{
|
|
e_guid_t uuid;
|
|
|
|
|
|
if (drep[0] & DREP_LITTLE_ENDIAN) {
|
|
tvb_get_letohguid(tvb, offset, (e_guid_t *) &uuid);
|
|
} else {
|
|
tvb_get_ntohguid(tvb, offset, (e_guid_t *) &uuid);
|
|
}
|
|
if (tree && hfindex != -1) {
|
|
proto_tree_add_guid(tree, hfindex, tvb, offset, 16, (e_guid_t *) &uuid);
|
|
}
|
|
if (pdata) {
|
|
*pdata = uuid;
|
|
}
|
|
return offset + 16;
|
|
}
|
|
|
|
|
|
/*
|
|
* a couple simpler things
|
|
*/
|
|
guint16
|
|
dcerpc_tvb_get_ntohs(tvbuff_t *tvb, gint offset, guint8 *drep)
|
|
{
|
|
if (drep[0] & DREP_LITTLE_ENDIAN) {
|
|
return tvb_get_letohs(tvb, offset);
|
|
} else {
|
|
return tvb_get_ntohs(tvb, offset);
|
|
}
|
|
}
|
|
|
|
guint32
|
|
dcerpc_tvb_get_ntohl(tvbuff_t *tvb, gint offset, guint8 *drep)
|
|
{
|
|
if (drep[0] & DREP_LITTLE_ENDIAN) {
|
|
return tvb_get_letohl(tvb, offset);
|
|
} else {
|
|
return tvb_get_ntohl(tvb, offset);
|
|
}
|
|
}
|
|
|
|
void
|
|
dcerpc_tvb_get_uuid(tvbuff_t *tvb, gint offset, guint8 *drep, e_guid_t *uuid)
|
|
{
|
|
if (drep[0] & DREP_LITTLE_ENDIAN) {
|
|
tvb_get_letohguid(tvb, offset, (e_guid_t *) uuid);
|
|
} else {
|
|
tvb_get_ntohguid(tvb, offset, (e_guid_t *) uuid);
|
|
}
|
|
}
|
|
|
|
|
|
/* NDR arrays */
|
|
/* function to dissect a unidimensional conformant array */
|
|
int
|
|
dissect_ndr_ucarray(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep,
|
|
dcerpc_dissect_fnct_t *fnct)
|
|
{
|
|
guint32 i;
|
|
int old_offset;
|
|
int conformance_size = 4;
|
|
|
|
if (di->call_data->flags & DCERPC_IS_NDR64) {
|
|
conformance_size = 8;
|
|
}
|
|
|
|
if (di->conformant_run) {
|
|
guint64 val;
|
|
|
|
/* conformant run, just dissect the max_count header */
|
|
old_offset = offset;
|
|
di->conformant_run = 0;
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, tree, di, drep,
|
|
hf_dcerpc_array_max_count, &val);
|
|
di->array_max_count = (gint32)val;
|
|
di->array_max_count_offset = offset-conformance_size;
|
|
di->conformant_run = 1;
|
|
di->conformant_eaten = offset-old_offset;
|
|
} else {
|
|
/* we don't remember where in the bytestream this field was */
|
|
proto_tree_add_uint(tree, hf_dcerpc_array_max_count, tvb, di->array_max_count_offset, conformance_size, di->array_max_count);
|
|
|
|
/* real run, dissect the elements */
|
|
for (i=0; i<di->array_max_count; i++) {
|
|
offset = (*fnct)(tvb, offset, pinfo, tree, di, drep);
|
|
}
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
/* function to dissect a unidimensional conformant and varying array
|
|
* depending on the dissection function passed as a parameter,
|
|
* content of the array will be dissected as a block or byte by byte
|
|
*/
|
|
static int
|
|
dissect_ndr_ucvarray_core(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep,
|
|
dcerpc_dissect_fnct_t *fnct_bytes,
|
|
dcerpc_dissect_fnct_blk_t *fnct_block)
|
|
{
|
|
guint32 i;
|
|
int old_offset;
|
|
int conformance_size = 4;
|
|
|
|
if (di->call_data->flags & DCERPC_IS_NDR64) {
|
|
conformance_size = 8;
|
|
}
|
|
|
|
if (di->conformant_run) {
|
|
guint64 val;
|
|
|
|
/* conformant run, just dissect the max_count header */
|
|
old_offset = offset;
|
|
di->conformant_run = 0;
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, tree, di, drep,
|
|
hf_dcerpc_array_max_count, &val);
|
|
DISSECTOR_ASSERT(val <= G_MAXUINT32);
|
|
di->array_max_count = (guint32)val;
|
|
di->array_max_count_offset = offset-conformance_size;
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, tree, di, drep,
|
|
hf_dcerpc_array_offset, &val);
|
|
DISSECTOR_ASSERT(val <= G_MAXUINT32);
|
|
di->array_offset = (guint32)val;
|
|
di->array_offset_offset = offset-conformance_size;
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, tree, di, drep,
|
|
hf_dcerpc_array_actual_count, &val);
|
|
DISSECTOR_ASSERT(val <= G_MAXUINT32);
|
|
di->array_actual_count = (guint32)val;
|
|
di->array_actual_count_offset = offset-conformance_size;
|
|
di->conformant_run = 1;
|
|
di->conformant_eaten = offset-old_offset;
|
|
} else {
|
|
/* we don't remember where in the bytestream these fields were */
|
|
proto_tree_add_uint(tree, hf_dcerpc_array_max_count, tvb, di->array_max_count_offset, conformance_size, di->array_max_count);
|
|
proto_tree_add_uint(tree, hf_dcerpc_array_offset, tvb, di->array_offset_offset, conformance_size, di->array_offset);
|
|
proto_tree_add_uint(tree, hf_dcerpc_array_actual_count, tvb, di->array_actual_count_offset, conformance_size, di->array_actual_count);
|
|
|
|
/* real run, dissect the elements */
|
|
if (fnct_block) {
|
|
offset = (*fnct_block)(tvb, offset, di->array_actual_count, pinfo, tree, drep);
|
|
} else {
|
|
for (i=0 ;i<di->array_actual_count; i++) {
|
|
old_offset = offset;
|
|
offset = (*fnct_bytes)(tvb, offset, pinfo, tree, di, drep);
|
|
if (offset <= old_offset)
|
|
THROW(ReportedBoundsError);
|
|
}
|
|
}
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
int
|
|
dissect_ndr_ucvarray_block(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep,
|
|
dcerpc_dissect_fnct_blk_t *fnct)
|
|
{
|
|
return dissect_ndr_ucvarray_core(tvb, offset, pinfo, tree, di, drep, NULL, fnct);
|
|
}
|
|
|
|
int
|
|
dissect_ndr_ucvarray(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep,
|
|
dcerpc_dissect_fnct_t *fnct)
|
|
{
|
|
return dissect_ndr_ucvarray_core(tvb, offset, pinfo, tree, di, drep, fnct, NULL);
|
|
}
|
|
/* function to dissect a unidimensional varying array */
|
|
int
|
|
dissect_ndr_uvarray(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep,
|
|
dcerpc_dissect_fnct_t *fnct)
|
|
{
|
|
guint32 i;
|
|
int old_offset;
|
|
int conformance_size = 4;
|
|
|
|
if (di->call_data->flags & DCERPC_IS_NDR64) {
|
|
conformance_size = 8;
|
|
}
|
|
|
|
if (di->conformant_run) {
|
|
guint64 val;
|
|
|
|
/* conformant run, just dissect the max_count header */
|
|
old_offset = offset;
|
|
di->conformant_run = 0;
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, tree, di, drep,
|
|
hf_dcerpc_array_offset, &val);
|
|
DISSECTOR_ASSERT(val <= G_MAXUINT32);
|
|
di->array_offset = (guint32)val;
|
|
di->array_offset_offset = offset-conformance_size;
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, tree, di, drep,
|
|
hf_dcerpc_array_actual_count, &val);
|
|
DISSECTOR_ASSERT(val <= G_MAXUINT32);
|
|
di->array_actual_count = (guint32)val;
|
|
di->array_actual_count_offset = offset-conformance_size;
|
|
di->conformant_run = 1;
|
|
di->conformant_eaten = offset-old_offset;
|
|
} else {
|
|
/* we don't remember where in the bytestream these fields were */
|
|
proto_tree_add_uint(tree, hf_dcerpc_array_offset, tvb, di->array_offset_offset, conformance_size, di->array_offset);
|
|
proto_tree_add_uint(tree, hf_dcerpc_array_actual_count, tvb, di->array_actual_count_offset, conformance_size, di->array_actual_count);
|
|
|
|
/* real run, dissect the elements */
|
|
for (i=0; i<di->array_actual_count; i++) {
|
|
offset = (*fnct)(tvb, offset, pinfo, tree, di, drep);
|
|
}
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
/* Dissect an string of bytes. This corresponds to
|
|
IDL of the form '[string] byte *foo'.
|
|
|
|
It can also be used for a conformant varying array of bytes if
|
|
the contents of the array should be shown as a big blob, rather
|
|
than showing each byte as an individual element.
|
|
|
|
XXX - which of those is really the IDL type for, for example,
|
|
the encrypted data in some MAPI packets? (Microsoft hasn't
|
|
released that IDL.)
|
|
|
|
XXX - does this need to do all the conformant array stuff that
|
|
"dissect_ndr_ucvarray()" does? These are presumably for strings
|
|
that are conformant and varying - they're stored like conformant
|
|
varying arrays of bytes. */
|
|
int
|
|
dissect_ndr_byte_array(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep)
|
|
{
|
|
guint64 len;
|
|
|
|
if (di->conformant_run) {
|
|
/* just a run to handle conformant arrays, no scalars to dissect */
|
|
return offset;
|
|
}
|
|
|
|
/* NDR array header */
|
|
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, tree, di, drep,
|
|
hf_dcerpc_array_max_count, NULL);
|
|
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, tree, di, drep,
|
|
hf_dcerpc_array_offset, NULL);
|
|
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, tree, di, drep,
|
|
hf_dcerpc_array_actual_count, &len);
|
|
|
|
DISSECTOR_ASSERT(len <= G_MAXUINT32);
|
|
if (len) {
|
|
proto_tree_add_item(tree, di->hf_index, tvb, offset, (guint32)len,
|
|
ENC_NA);
|
|
}
|
|
|
|
offset += (guint32)len;
|
|
|
|
return offset;
|
|
}
|
|
|
|
/* For dissecting arrays that are to be interpreted as strings. */
|
|
|
|
/* Dissect an NDR conformant varying string of elements.
|
|
The length of each element is given by the 'size_is' parameter;
|
|
the elements are assumed to be characters or wide characters.
|
|
|
|
XXX - does this need to do all the conformant array stuff that
|
|
"dissect_ndr_ucvarray()" does? */
|
|
int
|
|
dissect_ndr_cvstring(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep, int size_is,
|
|
int hfindex, gboolean add_subtree, char **data)
|
|
{
|
|
header_field_info *hfinfo;
|
|
proto_item *string_item;
|
|
proto_tree *string_tree;
|
|
guint64 len;
|
|
guint32 buffer_len;
|
|
char *s;
|
|
|
|
/* Make sure this really is a string field. */
|
|
hfinfo = proto_registrar_get_nth(hfindex);
|
|
DISSECTOR_ASSERT(hfinfo->type == FT_STRING);
|
|
|
|
if (di->conformant_run) {
|
|
/* just a run to handle conformant arrays, no scalars to dissect */
|
|
return offset;
|
|
}
|
|
|
|
if (add_subtree) {
|
|
string_tree = proto_tree_add_subtree(tree, tvb, offset, -1, ett_dcerpc_string, &string_item,
|
|
proto_registrar_get_name(hfindex));
|
|
} else {
|
|
string_item = NULL;
|
|
string_tree = tree;
|
|
}
|
|
|
|
/* NDR array header */
|
|
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, string_tree, di, drep,
|
|
hf_dcerpc_array_max_count, NULL);
|
|
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, string_tree, di, drep,
|
|
hf_dcerpc_array_offset, NULL);
|
|
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, string_tree, di, drep,
|
|
hf_dcerpc_array_actual_count, &len);
|
|
|
|
/* The value is truncated to 32bits. 64bit values have only been
|
|
seen on fuzztested files */
|
|
buffer_len = size_is * (guint32)len;
|
|
|
|
/* Adjust offset */
|
|
if (!di->no_align && (offset % size_is))
|
|
offset += size_is - (offset % size_is);
|
|
|
|
/*
|
|
* "tvb_get_string_enc()" throws an exception if the entire string
|
|
* isn't in the tvbuff. If the length is bogus, this should
|
|
* keep us from trying to allocate an immensely large buffer.
|
|
* (It won't help if the length is *valid* but immensely large,
|
|
* but that's another matter; in any case, that would happen only
|
|
* if we had an immensely large tvbuff....)
|
|
*
|
|
* XXX - so why are we doing tvb_ensure_bytes_exist()?
|
|
*/
|
|
tvb_ensure_bytes_exist(tvb, offset, buffer_len);
|
|
if (size_is == sizeof(guint16)) {
|
|
/*
|
|
* Assume little-endian UTF-16.
|
|
*
|
|
* XXX - is this always little-endian?
|
|
*/
|
|
s = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, buffer_len,
|
|
ENC_UTF_16|ENC_LITTLE_ENDIAN);
|
|
} else {
|
|
/*
|
|
* XXX - what if size_is is neither 1 nor 2?
|
|
*/
|
|
s = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, buffer_len,
|
|
DREP_ENC_CHAR(drep));
|
|
}
|
|
if (tree && buffer_len)
|
|
proto_tree_add_string(string_tree, hfindex, tvb, offset,
|
|
buffer_len, s);
|
|
|
|
if (string_item != NULL)
|
|
proto_item_append_text(string_item, ": %s", s);
|
|
|
|
if (data)
|
|
*data = s;
|
|
|
|
offset += buffer_len;
|
|
|
|
proto_item_set_end(string_item, tvb, offset);
|
|
|
|
return offset;
|
|
}
|
|
|
|
int
|
|
dissect_ndr_cstring(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep, int size_is,
|
|
int hfindex, gboolean add_subtree, char **data)
|
|
{
|
|
return dissect_ndr_cvstring(tvb, offset, pinfo, tree, di, drep, size_is, hfindex, add_subtree, data);
|
|
}
|
|
|
|
/* Dissect an conformant varying string of chars.
|
|
This corresponds to IDL of the form '[string] char *foo'.
|
|
|
|
XXX - at least according to the DCE RPC 1.1 spec, a string has
|
|
a null terminator, which isn't necessary as a terminator for
|
|
the transfer language (as there's a length), but is presumably
|
|
there for the benefit of null-terminated-string languages
|
|
such as C. Is this ever used for purely counted strings?
|
|
(Not that it matters if it is.) */
|
|
int
|
|
dissect_ndr_char_cvstring(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep)
|
|
{
|
|
return dissect_ndr_cvstring(tvb, offset, pinfo, tree, di, drep,
|
|
sizeof(guint8), di->hf_index,
|
|
FALSE, NULL);
|
|
}
|
|
|
|
/* Dissect a conformant varying string of wchars (wide characters).
|
|
This corresponds to IDL of the form '[string] wchar *foo'
|
|
|
|
XXX - at least according to the DCE RPC 1.1 spec, a string has
|
|
a null terminator, which isn't necessary as a terminator for
|
|
the transfer language (as there's a length), but is presumably
|
|
there for the benefit of null-terminated-string languages
|
|
such as C. Is this ever used for purely counted strings?
|
|
(Not that it matters if it is.) */
|
|
int
|
|
dissect_ndr_wchar_cvstring(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep)
|
|
{
|
|
return dissect_ndr_cvstring(tvb, offset, pinfo, tree, di, drep,
|
|
sizeof(guint16), di->hf_index,
|
|
FALSE, NULL);
|
|
}
|
|
|
|
/* This function is aimed for PIDL usage and dissects a UNIQUE pointer to
|
|
* unicode string.
|
|
*/
|
|
int
|
|
PIDL_dissect_cvstring(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, dcerpc_info *di, guint8 *drep, int chsize, int hfindex, guint32 param)
|
|
{
|
|
char *s = NULL;
|
|
gint levels = CB_STR_ITEM_LEVELS(param);
|
|
|
|
offset = dissect_ndr_cvstring(tvb, offset, pinfo, tree, di, drep,
|
|
chsize, hfindex,
|
|
FALSE, &s);
|
|
|
|
if (!di->conformant_run) {
|
|
/* Append string to COL_INFO */
|
|
if (param & PIDL_SET_COL_INFO) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", %s", s);
|
|
}
|
|
/* Save string to dcv->private_data */
|
|
if ((param & PIDL_STR_SAVE)
|
|
&& (!pinfo->fd->flags.visited)) {
|
|
dcerpc_call_value *dcv = (dcerpc_call_value *)di->call_data;
|
|
dcv->private_data = wmem_strdup(wmem_file_scope(), s);
|
|
}
|
|
/* Append string to upper-level proto_items */
|
|
if ((levels > 0) && tree && s && s[0]) {
|
|
proto_item_append_text(tree, ": %s", s);
|
|
tree = tree->parent;
|
|
levels--;
|
|
if (levels > 0) {
|
|
proto_item_append_text(tree, ": %s", s);
|
|
tree = tree->parent;
|
|
levels--;
|
|
while (levels > 0) {
|
|
proto_item_append_text(tree, " %s", s);
|
|
tree = tree->parent;
|
|
levels--;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
/* Dissect an NDR varying string of elements.
|
|
The length of each element is given by the 'size_is' parameter;
|
|
the elements are assumed to be characters or wide characters.
|
|
*/
|
|
int
|
|
dissect_ndr_vstring(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep, int size_is,
|
|
int hfindex, gboolean add_subtree, char **data)
|
|
{
|
|
header_field_info *hfinfo;
|
|
proto_item *string_item;
|
|
proto_tree *string_tree;
|
|
guint64 len;
|
|
guint32 buffer_len;
|
|
char *s;
|
|
|
|
/* Make sure this really is a string field. */
|
|
hfinfo = proto_registrar_get_nth(hfindex);
|
|
DISSECTOR_ASSERT(hfinfo->type == FT_STRING);
|
|
|
|
if (di->conformant_run) {
|
|
/* just a run to handle conformant arrays, no scalars to dissect */
|
|
return offset;
|
|
}
|
|
|
|
if (add_subtree) {
|
|
string_tree = proto_tree_add_subtree(tree, tvb, offset, -1, ett_dcerpc_string, &string_item,
|
|
proto_registrar_get_name(hfindex));
|
|
} else {
|
|
string_item = NULL;
|
|
string_tree = tree;
|
|
}
|
|
|
|
/* NDR array header */
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, string_tree, di, drep,
|
|
hf_dcerpc_array_offset, NULL);
|
|
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, string_tree, di, drep,
|
|
hf_dcerpc_array_actual_count, &len);
|
|
|
|
DISSECTOR_ASSERT(len <= G_MAXUINT32);
|
|
buffer_len = size_is * (guint32)len;
|
|
|
|
/* Adjust offset */
|
|
if (!di->no_align && (offset % size_is))
|
|
offset += size_is - (offset % size_is);
|
|
|
|
/*
|
|
* "tvb_get_string_enc()" throws an exception if the entire string
|
|
* isn't in the tvbuff. If the length is bogus, this should
|
|
* keep us from trying to allocate an immensely large buffer.
|
|
* (It won't help if the length is *valid* but immensely large,
|
|
* but that's another matter; in any case, that would happen only
|
|
* if we had an immensely large tvbuff....)
|
|
*
|
|
* XXX - so why are we doing tvb_ensure_bytes_exist()?
|
|
*/
|
|
tvb_ensure_bytes_exist(tvb, offset, buffer_len);
|
|
if (size_is == sizeof(guint16)) {
|
|
/*
|
|
* Assume little-endian UTF-16.
|
|
*
|
|
* XXX - is this always little-endian?
|
|
*/
|
|
s = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, buffer_len,
|
|
ENC_UTF_16|ENC_LITTLE_ENDIAN);
|
|
} else {
|
|
/*
|
|
* XXX - what if size_is is neither 1 nor 2?
|
|
*/
|
|
s = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, buffer_len,
|
|
DREP_ENC_CHAR(drep));
|
|
}
|
|
if (tree && buffer_len)
|
|
proto_tree_add_string(string_tree, hfindex, tvb, offset,
|
|
buffer_len, s);
|
|
|
|
if (string_item != NULL)
|
|
proto_item_append_text(string_item, ": %s", s);
|
|
|
|
if (data)
|
|
*data = s;
|
|
|
|
offset += buffer_len;
|
|
|
|
proto_item_set_end(string_item, tvb, offset);
|
|
|
|
return offset;
|
|
}
|
|
|
|
/* Dissect an varying string of chars.
|
|
This corresponds to IDL of the form '[string] char *foo'.
|
|
|
|
XXX - at least according to the DCE RPC 1.1 spec, a string has
|
|
a null terminator, which isn't necessary as a terminator for
|
|
the transfer language (as there's a length), but is presumably
|
|
there for the benefit of null-terminated-string languages
|
|
such as C. Is this ever used for purely counted strings?
|
|
(Not that it matters if it is.) */
|
|
int
|
|
dissect_ndr_char_vstring(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep)
|
|
{
|
|
return dissect_ndr_vstring(tvb, offset, pinfo, tree, di, drep,
|
|
sizeof(guint8), di->hf_index,
|
|
FALSE, NULL);
|
|
}
|
|
|
|
/* Dissect a varying string of wchars (wide characters).
|
|
This corresponds to IDL of the form '[string] wchar *foo'
|
|
|
|
XXX - at least according to the DCE RPC 1.1 spec, a string has
|
|
a null terminator, which isn't necessary as a terminator for
|
|
the transfer language (as there's a length), but is presumably
|
|
there for the benefit of null-terminated-string languages
|
|
such as C. Is this ever used for purely counted strings?
|
|
(Not that it matters if it is.) */
|
|
int
|
|
dissect_ndr_wchar_vstring(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep)
|
|
{
|
|
return dissect_ndr_vstring(tvb, offset, pinfo, tree, di, drep,
|
|
sizeof(guint16), di->hf_index,
|
|
FALSE, NULL);
|
|
}
|
|
|
|
|
|
/* ndr pointer handling */
|
|
/* list of pointers encountered so far */
|
|
static GSList *ndr_pointer_list = NULL;
|
|
|
|
/* position where in the list to insert newly encountered pointers */
|
|
static int ndr_pointer_list_pos = 0;
|
|
|
|
/* Boolean controlling whether pointers are top-level or embedded */
|
|
static gboolean pointers_are_top_level = TRUE;
|
|
|
|
/* as a kludge, we represent all embedded reference pointers as id == -1
|
|
hoping that his will not collide with any non-ref pointers */
|
|
typedef struct ndr_pointer_data {
|
|
guint32 id;
|
|
proto_item *item; /* proto_item for pointer */
|
|
proto_tree *tree; /* subtree of above item */
|
|
dcerpc_dissect_fnct_t *fnct; /*if non-NULL, we have not called it yet*/
|
|
int hf_index;
|
|
dcerpc_callback_fnct_t *callback;
|
|
void *callback_args;
|
|
} ndr_pointer_data_t;
|
|
|
|
void
|
|
init_ndr_pointer_list(dcerpc_info *di)
|
|
{
|
|
di->conformant_run = 0;
|
|
|
|
while (ndr_pointer_list) {
|
|
ndr_pointer_data_t *npd = (ndr_pointer_data_t *)g_slist_nth_data(ndr_pointer_list, 0);
|
|
ndr_pointer_list = g_slist_remove(ndr_pointer_list, npd);
|
|
g_free(npd);
|
|
}
|
|
|
|
ndr_pointer_list = NULL;
|
|
ndr_pointer_list_pos = 0;
|
|
pointers_are_top_level = TRUE;
|
|
}
|
|
|
|
int
|
|
dissect_deferred_pointers(packet_info *pinfo, tvbuff_t *tvb, int offset, dcerpc_info *di, guint8 *drep)
|
|
{
|
|
int found_new_pointer;
|
|
int old_offset;
|
|
int next_pointer;
|
|
|
|
next_pointer = 0;
|
|
|
|
do{
|
|
int i, len;
|
|
|
|
found_new_pointer = 0;
|
|
len = g_slist_length(ndr_pointer_list);
|
|
for (i=next_pointer; i<len; i++) {
|
|
ndr_pointer_data_t *tnpd = (ndr_pointer_data_t *)g_slist_nth_data(ndr_pointer_list, i);
|
|
if (tnpd->fnct) {
|
|
dcerpc_dissect_fnct_t *fnct;
|
|
|
|
next_pointer = i+1;
|
|
found_new_pointer = 1;
|
|
fnct = tnpd->fnct;
|
|
tnpd->fnct = NULL;
|
|
ndr_pointer_list_pos = i+1;
|
|
di->hf_index = tnpd->hf_index;
|
|
/* first a run to handle any conformant
|
|
array headers */
|
|
di->conformant_run = 1;
|
|
di->conformant_eaten = 0;
|
|
old_offset = offset;
|
|
offset = (*(fnct))(tvb, offset, pinfo, NULL, di, drep);
|
|
|
|
DISSECTOR_ASSERT((offset-old_offset) == di->conformant_eaten);
|
|
/* This is to check for any bugs in the dissectors.
|
|
*
|
|
* Basically, the NDR representation will store all
|
|
* arrays in two blocks, one block with the dimension
|
|
* description, like size, number of elements and such,
|
|
* and another block that contains the actual data stored
|
|
* in the array.
|
|
* If the array is embedded directly inside another,
|
|
* encapsulating aggregate type, like a union or struct,
|
|
* then these two blocks will be stored at different places
|
|
* in the bytestream, with other data between the blocks.
|
|
*
|
|
* For this reason, all pointers to types (both aggregate
|
|
* and scalar, for simplicity no distinction is made)
|
|
* will have its dissector called twice.
|
|
* The dissector will first be called with conformant_run == 1
|
|
* in which mode the dissector MUST NOT consume any data from
|
|
* the tvbuff (i.e. may not dissect anything) except the
|
|
* initial control block for arrays.
|
|
* The second time the dissector is called, with
|
|
* conformant_run == 0, all other data for the type will be
|
|
* dissected.
|
|
*
|
|
* All dissect_ndr_<type> dissectors are already prepared
|
|
* for this and knows when it should eat data from the tvb
|
|
* and when not to, so implementors of dissectors will
|
|
* normally not need to worry about this or even know about
|
|
* it. However, if a dissector for an aggregate type calls
|
|
* a subdissector from outside packet-dcerpc.c, such as
|
|
* the dissector in packet-smb.c for NT Security Descriptors
|
|
* as an example, then it is VERY important to encapsulate
|
|
* this call to an external subdissector with the appropriate
|
|
* test for conformant_run, i.e. it will need something like
|
|
*
|
|
* dcerpc_info *di (received as function parameter)
|
|
*
|
|
* if (di->conformant_run) {
|
|
* return offset;
|
|
* }
|
|
*
|
|
* to make sure it makes the right thing.
|
|
* This assert will signal when someone has forgotten to
|
|
* make the dissector aware of this requirement.
|
|
*/
|
|
|
|
/* now we dissect the actual pointer */
|
|
di->conformant_run = 0;
|
|
old_offset = offset;
|
|
offset = (*(fnct))(tvb, offset, pinfo, tnpd->tree, di, drep);
|
|
if (tnpd->callback)
|
|
tnpd->callback(pinfo, tnpd->tree, tnpd->item, di, tvb, old_offset, offset, tnpd->callback_args);
|
|
proto_item_set_len(tnpd->item, offset - old_offset);
|
|
break;
|
|
}
|
|
}
|
|
} while (found_new_pointer);
|
|
|
|
return offset;
|
|
}
|
|
|
|
|
|
static void
|
|
add_pointer_to_list(packet_info *pinfo, proto_tree *tree, proto_item *item,
|
|
dcerpc_info *di, dcerpc_dissect_fnct_t *fnct, guint32 id, int hf_index,
|
|
dcerpc_callback_fnct_t *callback, void *callback_args)
|
|
{
|
|
ndr_pointer_data_t *npd;
|
|
|
|
/* check if this pointer is valid */
|
|
if (id != 0xffffffff) {
|
|
dcerpc_call_value *value;
|
|
|
|
value = di->call_data;
|
|
|
|
if (di->ptype == PDU_REQ) {
|
|
if (!(pinfo->fd->flags.visited)) {
|
|
if (id > value->max_ptr) {
|
|
value->max_ptr = id;
|
|
}
|
|
}
|
|
} else {
|
|
/* if we haven't seen the request bail out since we can't
|
|
know whether this is the first non-NULL instance
|
|
or not */
|
|
if (value->req_frame == 0) {
|
|
/* XXX THROW EXCEPTION */
|
|
}
|
|
|
|
/* We saw this one in the request frame, nothing to
|
|
dissect later */
|
|
if (id <= value->max_ptr) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
npd = (ndr_pointer_data_t *)g_malloc(sizeof(ndr_pointer_data_t));
|
|
npd->id = id;
|
|
npd->tree = tree;
|
|
npd->item = item;
|
|
npd->fnct = fnct;
|
|
npd->hf_index = hf_index;
|
|
npd->callback = callback;
|
|
npd->callback_args = callback_args;
|
|
ndr_pointer_list = g_slist_insert(ndr_pointer_list, npd,
|
|
ndr_pointer_list_pos);
|
|
ndr_pointer_list_pos++;
|
|
}
|
|
|
|
|
|
static int
|
|
find_pointer_index(guint32 id)
|
|
{
|
|
ndr_pointer_data_t *npd;
|
|
int i,len;
|
|
|
|
len = g_slist_length(ndr_pointer_list);
|
|
for (i=0; i<len; i++) {
|
|
npd = (ndr_pointer_data_t *)g_slist_nth_data(ndr_pointer_list, i);
|
|
if (npd) {
|
|
if (npd->id == id) {
|
|
return i;
|
|
}
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* This function dissects an NDR pointer and stores the callback for later
|
|
* deferred dissection.
|
|
*
|
|
* fnct is the callback function for when we have reached this object in
|
|
* the bytestream.
|
|
*
|
|
* type is what type of pointer.
|
|
*
|
|
* this is text is what text we should put in any created tree node.
|
|
*
|
|
* hf_index is what hf value we want to pass to the callback function when
|
|
* it is called, the callback can later pick this one up from di->hf_index.
|
|
*
|
|
* callback is executed after the pointer has been dereferenced.
|
|
*
|
|
* callback_args is passed as an argument to the callback function
|
|
*
|
|
* See packet-dcerpc-samr.c for examples
|
|
*/
|
|
int
|
|
dissect_ndr_pointer_cb(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep, dcerpc_dissect_fnct_t *fnct,
|
|
int type, const char *text, int hf_index,
|
|
dcerpc_callback_fnct_t *callback, void *callback_args)
|
|
{
|
|
proto_tree *tr = NULL;
|
|
gint start_offset = offset;
|
|
int pointer_size = 4;
|
|
|
|
if (di->conformant_run) {
|
|
/* this call was only for dissecting the header for any
|
|
embedded conformant array. we will not parse any
|
|
pointers in this mode.
|
|
*/
|
|
return offset;
|
|
}
|
|
if (di->call_data->flags & DCERPC_IS_NDR64) {
|
|
pointer_size = 8;
|
|
}
|
|
|
|
|
|
/*TOP LEVEL REFERENCE POINTER*/
|
|
if ( pointers_are_top_level
|
|
&& (type == NDR_POINTER_REF) ) {
|
|
proto_item *item;
|
|
|
|
/* we must find out a nice way to do the length here */
|
|
tr = proto_tree_add_subtree(tree, tvb, offset, 0,
|
|
ett_dcerpc_pointer_data, &item, text);
|
|
|
|
add_pointer_to_list(pinfo, tr, item, di, fnct, 0xffffffff,
|
|
hf_index, callback, callback_args);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/*TOP LEVEL FULL POINTER*/
|
|
if ( pointers_are_top_level
|
|
&& (type == NDR_POINTER_PTR) ) {
|
|
int idx;
|
|
guint64 id;
|
|
proto_item *item;
|
|
|
|
/* get the referent id */
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, NULL, di, drep, -1, &id);
|
|
|
|
/* we got a NULL pointer */
|
|
if (id == 0) {
|
|
proto_tree_add_text(tree, tvb, offset-pointer_size,
|
|
pointer_size,
|
|
"(NULL pointer) %s",text);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/* see if we have seen this pointer before
|
|
The value is truncated to 32bits. 64bit values have only been
|
|
seen on fuzz-tested files */
|
|
idx = find_pointer_index((guint32)id);
|
|
|
|
/* we have seen this pointer before */
|
|
if (idx >= 0) {
|
|
proto_tree_add_text(tree, tvb, offset-pointer_size,
|
|
pointer_size,
|
|
"(duplicate PTR) %s",text);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/* new pointer */
|
|
tr = proto_tree_add_subtree(tree, tvb, offset-pointer_size,
|
|
pointer_size, ett_dcerpc_pointer_data, &item, text);
|
|
if (di->call_data->flags & DCERPC_IS_NDR64) {
|
|
proto_tree_add_uint64(tr, hf_dcerpc_referent_id64, tvb,
|
|
offset-pointer_size, pointer_size, id);
|
|
} else {
|
|
proto_tree_add_uint(tr, hf_dcerpc_referent_id32, tvb,
|
|
offset-pointer_size, pointer_size, (guint32)id);
|
|
}
|
|
add_pointer_to_list(pinfo, tr, item, di, fnct, (guint32)id, hf_index,
|
|
callback, callback_args);
|
|
goto after_ref_id;
|
|
}
|
|
/*TOP LEVEL UNIQUE POINTER*/
|
|
if ( pointers_are_top_level
|
|
&& (type == NDR_POINTER_UNIQUE) ) {
|
|
guint64 id;
|
|
proto_item *item;
|
|
|
|
/* get the referent id */
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, NULL, di, drep, -1, &id);
|
|
|
|
/* we got a NULL pointer */
|
|
if (id == 0) {
|
|
proto_tree_add_text(tree, tvb, offset-pointer_size,
|
|
pointer_size,
|
|
"(NULL pointer) %s",text);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/* new pointer */
|
|
tr = proto_tree_add_subtree(tree, tvb, offset-pointer_size,
|
|
pointer_size,
|
|
ett_dcerpc_pointer_data, &item, text);
|
|
if (di->call_data->flags & DCERPC_IS_NDR64) {
|
|
proto_tree_add_uint64(tr, hf_dcerpc_referent_id64, tvb,
|
|
offset-pointer_size, pointer_size, id);
|
|
} else {
|
|
proto_tree_add_uint(tr, hf_dcerpc_referent_id32, tvb,
|
|
offset-pointer_size, pointer_size, (guint32)id);
|
|
}
|
|
add_pointer_to_list(pinfo, tr, item, di, fnct, 0xffffffff,
|
|
hf_index, callback, callback_args);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/*EMBEDDED REFERENCE POINTER*/
|
|
if ( (!pointers_are_top_level)
|
|
&& (type == NDR_POINTER_REF) ) {
|
|
guint64 id;
|
|
proto_item *item;
|
|
|
|
/* get the referent id */
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, NULL, di, drep, -1, &id);
|
|
|
|
/* new pointer */
|
|
tr = proto_tree_add_subtree(tree, tvb, offset-pointer_size,
|
|
pointer_size,
|
|
ett_dcerpc_pointer_data,&item,text);
|
|
if (di->call_data->flags & DCERPC_IS_NDR64) {
|
|
proto_tree_add_uint64(tr, hf_dcerpc_referent_id64, tvb,
|
|
offset-pointer_size, pointer_size, id);
|
|
} else {
|
|
proto_tree_add_uint(tr, hf_dcerpc_referent_id32, tvb,
|
|
offset-pointer_size, pointer_size, (guint32)id);
|
|
}
|
|
add_pointer_to_list(pinfo, tr, item, di, fnct, 0xffffffff,
|
|
hf_index, callback, callback_args);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/*EMBEDDED UNIQUE POINTER*/
|
|
if ( (!pointers_are_top_level)
|
|
&& (type == NDR_POINTER_UNIQUE) ) {
|
|
guint64 id;
|
|
proto_item *item;
|
|
|
|
/* get the referent id */
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, NULL, di, drep, -1, &id);
|
|
|
|
/* we got a NULL pointer */
|
|
if (id == 0) {
|
|
proto_tree_add_text(tree, tvb, offset-pointer_size,
|
|
pointer_size,
|
|
"(NULL pointer) %s", text);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/* new pointer */
|
|
tr = proto_tree_add_subtree(tree, tvb, offset-pointer_size,
|
|
pointer_size,
|
|
ett_dcerpc_pointer_data,&item,text);
|
|
if (di->call_data->flags & DCERPC_IS_NDR64) {
|
|
proto_tree_add_uint64(tr, hf_dcerpc_referent_id64, tvb,
|
|
offset-pointer_size, pointer_size, id);
|
|
} else {
|
|
proto_tree_add_uint(tr, hf_dcerpc_referent_id32, tvb,
|
|
offset-pointer_size, pointer_size, (guint32)id);
|
|
}
|
|
add_pointer_to_list(pinfo, tr, item, di, fnct, 0xffffffff,
|
|
hf_index, callback, callback_args);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/*EMBEDDED FULL POINTER*/
|
|
if ( (!pointers_are_top_level)
|
|
&& (type == NDR_POINTER_PTR) ) {
|
|
int idx;
|
|
guint64 id;
|
|
proto_item *item;
|
|
|
|
/* get the referent id */
|
|
offset = dissect_ndr_uint3264(tvb, offset, pinfo, NULL, di, drep, -1, &id);
|
|
|
|
/* we got a NULL pointer */
|
|
if (id == 0) {
|
|
proto_tree_add_text(tree, tvb, offset-pointer_size,
|
|
pointer_size,
|
|
"(NULL pointer) %s",text);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/* see if we have seen this pointer before
|
|
The value is truncated to 32bits. 64bit values have only been
|
|
seen on fuzztested files */
|
|
idx = find_pointer_index((guint32)id);
|
|
|
|
/* we have seen this pointer before */
|
|
if (idx >= 0) {
|
|
proto_tree_add_text(tree, tvb, offset-pointer_size,
|
|
pointer_size,
|
|
"(duplicate PTR) %s",text);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/* new pointer */
|
|
tr = proto_tree_add_subtree(tree, tvb, offset-pointer_size,
|
|
pointer_size,
|
|
ett_dcerpc_pointer_data, &item, text);
|
|
if (di->call_data->flags & DCERPC_IS_NDR64) {
|
|
proto_tree_add_uint64(tr, hf_dcerpc_referent_id64, tvb,
|
|
offset-pointer_size, pointer_size, id);
|
|
} else {
|
|
proto_tree_add_uint(tr, hf_dcerpc_referent_id32, tvb,
|
|
offset-pointer_size, pointer_size, (guint32)id);
|
|
}
|
|
add_pointer_to_list(pinfo, tr, item, di, fnct, (guint32)id, hf_index,
|
|
callback, callback_args);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
|
|
after_ref_id:
|
|
/* After each top level pointer we have dissected we have to
|
|
dissect all deferrals before we move on to the next top level
|
|
argument */
|
|
if (pointers_are_top_level == TRUE) {
|
|
pointers_are_top_level = FALSE;
|
|
offset = dissect_deferred_pointers(pinfo, tvb, offset, di, drep);
|
|
pointers_are_top_level = TRUE;
|
|
}
|
|
|
|
/* Set the length for the new subtree */
|
|
if (tr) {
|
|
proto_item_set_len(tr, offset-start_offset);
|
|
}
|
|
return offset;
|
|
}
|
|
|
|
int
|
|
dissect_ndr_pointer(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep, dcerpc_dissect_fnct_t *fnct,
|
|
int type, const char *text, int hf_index)
|
|
{
|
|
return dissect_ndr_pointer_cb(
|
|
tvb, offset, pinfo, tree, di, drep, fnct, type, text, hf_index,
|
|
NULL, NULL);
|
|
}
|
|
int
|
|
dissect_ndr_toplevel_pointer(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep, dcerpc_dissect_fnct_t *fnct,
|
|
int type, const char *text, int hf_index)
|
|
{
|
|
int ret;
|
|
|
|
pointers_are_top_level = TRUE;
|
|
ret = dissect_ndr_pointer_cb(
|
|
tvb, offset, pinfo, tree, di, drep, fnct, type, text, hf_index,
|
|
NULL, NULL);
|
|
return ret;
|
|
}
|
|
int
|
|
dissect_ndr_embedded_pointer(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *tree, dcerpc_info *di, guint8 *drep, dcerpc_dissect_fnct_t *fnct,
|
|
int type, const char *text, int hf_index)
|
|
{
|
|
int ret;
|
|
|
|
pointers_are_top_level = FALSE;
|
|
ret = dissect_ndr_pointer_cb(
|
|
tvb, offset, pinfo, tree, di, drep, fnct, type, text, hf_index,
|
|
NULL, NULL);
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
show_stub_data(tvbuff_t *tvb, gint offset, proto_tree *dcerpc_tree,
|
|
dcerpc_auth_info *auth_info, gboolean is_encrypted)
|
|
{
|
|
int length, plain_length, auth_pad_len;
|
|
guint auth_pad_offset;
|
|
|
|
/*
|
|
* We don't show stub data unless we have some in the tvbuff;
|
|
* however, in the protocol tree, we show, as the number of
|
|
* bytes, the reported number of bytes, not the number of bytes
|
|
* that happen to be in the tvbuff.
|
|
*/
|
|
if (tvb_reported_length_remaining(tvb, offset) > 0) {
|
|
auth_pad_len = auth_info?auth_info->auth_pad_len:0;
|
|
length = tvb_reported_length_remaining(tvb, offset);
|
|
|
|
/* if auth_pad_len is larger than length then we ignore auth_pad_len totally */
|
|
plain_length = length - auth_pad_len;
|
|
if (plain_length < 1) {
|
|
plain_length = length;
|
|
auth_pad_len = 0;
|
|
}
|
|
auth_pad_offset = offset + plain_length;
|
|
|
|
if ((auth_info != NULL) &&
|
|
(auth_info->auth_level == DCE_C_AUTHN_LEVEL_PKT_PRIVACY)) {
|
|
if (is_encrypted) {
|
|
proto_tree_add_text(dcerpc_tree, tvb, offset, length,
|
|
"Encrypted stub data (%d byte%s)",
|
|
length, plurality(length, "", "s"));
|
|
/* is the padding is still inside the encrypted blob, don't display it explicit */
|
|
auth_pad_len = 0;
|
|
} else {
|
|
proto_tree_add_text(dcerpc_tree, tvb, offset, plain_length,
|
|
"Decrypted stub data (%d byte%s)",
|
|
plain_length, plurality(plain_length, "", "s"));
|
|
}
|
|
} else {
|
|
proto_tree_add_text(dcerpc_tree, tvb, offset, plain_length,
|
|
"Stub data (%d byte%s)", plain_length,
|
|
plurality(plain_length, "", "s"));
|
|
}
|
|
/* If there is auth padding at the end of the stub, display it */
|
|
if (auth_pad_len != 0) {
|
|
proto_tree_add_text(dcerpc_tree, tvb, auth_pad_offset,
|
|
auth_pad_len,
|
|
"Auth Padding (%u byte%s)",
|
|
auth_pad_len,
|
|
plurality(auth_pad_len, "", "s"));
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
dcerpc_try_handoff(packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *dcerpc_tree,
|
|
tvbuff_t *volatile tvb, tvbuff_t *decrypted_tvb,
|
|
guint8 *drep, dcerpc_info *info,
|
|
dcerpc_auth_info *auth_info)
|
|
{
|
|
volatile gint offset = 0;
|
|
dcerpc_uuid_key key;
|
|
dcerpc_uuid_value *sub_proto;
|
|
proto_tree *volatile sub_tree = NULL;
|
|
dcerpc_sub_dissector *proc;
|
|
const gchar *name = NULL;
|
|
const char *volatile saved_proto;
|
|
guint length = 0, reported_length = 0;
|
|
tvbuff_t *volatile stub_tvb;
|
|
volatile guint auth_pad_len;
|
|
volatile int auth_pad_offset;
|
|
proto_item *sub_item = NULL;
|
|
proto_item *pi, *hidden_item;
|
|
|
|
dcerpc_dissect_fnct_t *volatile sub_dissect;
|
|
|
|
key.uuid = info->call_data->uuid;
|
|
key.ver = info->call_data->ver;
|
|
|
|
if ((sub_proto = (dcerpc_uuid_value *)g_hash_table_lookup(dcerpc_uuids, &key)) == NULL
|
|
|| !proto_is_protocol_enabled(sub_proto->proto)) {
|
|
/*
|
|
* We don't have a dissector for this UUID, or the protocol
|
|
* for that UUID is disabled.
|
|
*/
|
|
|
|
hidden_item = proto_tree_add_boolean(dcerpc_tree, hf_dcerpc_unknown_if_id,
|
|
tvb, offset, 0, TRUE);
|
|
PROTO_ITEM_SET_HIDDEN(hidden_item);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " %s V%u",
|
|
guids_resolve_guid_to_str(&info->call_data->uuid), info->call_data->ver);
|
|
|
|
if (decrypted_tvb != NULL) {
|
|
show_stub_data(decrypted_tvb, 0, dcerpc_tree, auth_info,
|
|
FALSE);
|
|
} else
|
|
show_stub_data(tvb, 0, dcerpc_tree, auth_info, TRUE);
|
|
return -1;
|
|
}
|
|
|
|
for (proc = sub_proto->procs; proc->name; proc++) {
|
|
if (proc->num == info->call_data->opnum) {
|
|
name = proc->name;
|
|
break;
|
|
}
|
|
}
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, sub_proto->name);
|
|
|
|
if (!name)
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "Unknown operation %u %s",
|
|
info->call_data->opnum,
|
|
(info->ptype == PDU_REQ) ? "request" : "response");
|
|
else
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "%s %s",
|
|
name, (info->ptype == PDU_REQ) ? "request" : "response");
|
|
|
|
sub_dissect = (info->ptype == PDU_REQ) ?
|
|
proc->dissect_rqst : proc->dissect_resp;
|
|
|
|
if (tree) {
|
|
sub_item = proto_tree_add_item(tree, sub_proto->proto_id,
|
|
(decrypted_tvb != NULL)?decrypted_tvb:tvb,
|
|
0, -1, ENC_NA);
|
|
|
|
if (sub_item) {
|
|
sub_tree = proto_item_add_subtree(sub_item, sub_proto->ett);
|
|
if (!name)
|
|
proto_item_append_text(sub_item, ", unknown operation %u",
|
|
info->call_data->opnum);
|
|
else
|
|
proto_item_append_text(sub_item, ", %s", name);
|
|
}
|
|
|
|
/*
|
|
* Put the operation number into the tree along with
|
|
* the operation's name.
|
|
*/
|
|
if (sub_proto->opnum_hf != -1)
|
|
proto_tree_add_uint_format(sub_tree, sub_proto->opnum_hf,
|
|
tvb, 0, 0, info->call_data->opnum,
|
|
"Operation: %s (%u)",
|
|
name ? name : "Unknown operation",
|
|
info->call_data->opnum);
|
|
else
|
|
proto_tree_add_uint_format_value(sub_tree, hf_dcerpc_op, tvb,
|
|
0, 0, info->call_data->opnum,
|
|
"%s (%u)",
|
|
name ? name : "Unknown operation",
|
|
info->call_data->opnum);
|
|
|
|
if ((info->ptype == PDU_REQ) && (info->call_data->rep_frame != 0)) {
|
|
pi = proto_tree_add_uint(sub_tree, hf_dcerpc_response_in,
|
|
tvb, 0, 0, info->call_data->rep_frame);
|
|
PROTO_ITEM_SET_GENERATED(pi);
|
|
}
|
|
if ((info->ptype == PDU_RESP) && (info->call_data->req_frame != 0)) {
|
|
pi = proto_tree_add_uint(sub_tree, hf_dcerpc_request_in,
|
|
tvb, 0, 0, info->call_data->req_frame);
|
|
PROTO_ITEM_SET_GENERATED(pi);
|
|
}
|
|
} /* tree */
|
|
|
|
if (decrypted_tvb != NULL) {
|
|
/* Either there was no encryption or we successfully decrypted
|
|
the encrypted payload. */
|
|
if (sub_dissect) {
|
|
/* We have a subdissector - call it. */
|
|
saved_proto = pinfo->current_proto;
|
|
pinfo->current_proto = sub_proto->name;
|
|
|
|
init_ndr_pointer_list(info);
|
|
|
|
length = tvb_captured_length(decrypted_tvb);
|
|
reported_length = tvb_reported_length(decrypted_tvb);
|
|
|
|
/*
|
|
* Remove the authentication padding from the stub data.
|
|
*/
|
|
if ((auth_info != NULL) && (auth_info->auth_pad_len != 0)) {
|
|
if (reported_length >= auth_info->auth_pad_len) {
|
|
/*
|
|
* OK, the padding length isn't so big that it
|
|
* exceeds the stub length. Trim the reported
|
|
* length of the tvbuff.
|
|
*/
|
|
reported_length -= auth_info->auth_pad_len;
|
|
|
|
/*
|
|
* If that exceeds the actual amount of data in
|
|
* the tvbuff (which means we have at least one
|
|
* byte of authentication padding in the tvbuff),
|
|
* trim the actual amount.
|
|
*/
|
|
if (length > reported_length)
|
|
length = reported_length;
|
|
|
|
stub_tvb = tvb_new_subset(decrypted_tvb, 0, length, reported_length);
|
|
auth_pad_len = auth_info->auth_pad_len;
|
|
auth_pad_offset = reported_length;
|
|
} else {
|
|
/*
|
|
* The padding length exceeds the stub length.
|
|
* Don't bother dissecting the stub, trim the padding
|
|
* length to what's in the stub data, and show the
|
|
* entire stub as authentication padding.
|
|
*/
|
|
stub_tvb = NULL;
|
|
auth_pad_len = reported_length;
|
|
auth_pad_offset = 0;
|
|
length = 0;
|
|
}
|
|
} else {
|
|
/*
|
|
* No authentication padding.
|
|
*/
|
|
stub_tvb = decrypted_tvb;
|
|
auth_pad_len = 0;
|
|
auth_pad_offset = 0;
|
|
}
|
|
|
|
if (sub_item) {
|
|
proto_item_set_len(sub_item, length);
|
|
}
|
|
|
|
if (stub_tvb != NULL) {
|
|
/*
|
|
* Catch all exceptions other than BoundsError, so that even
|
|
* if the stub data is bad, we still show the authentication
|
|
* padding, if any.
|
|
*
|
|
* If we get BoundsError, it means the frame was cut short
|
|
* by a snapshot length, so there's nothing more to
|
|
* dissect; just re-throw that exception.
|
|
*/
|
|
TRY {
|
|
int remaining;
|
|
|
|
offset = sub_dissect(stub_tvb, 0, pinfo, sub_tree,
|
|
info, drep);
|
|
|
|
/* If we have a subdissector and it didn't dissect all
|
|
data in the tvb, make a note of it. */
|
|
remaining = tvb_reported_length_remaining(stub_tvb, offset);
|
|
if (remaining > 0) {
|
|
proto_tree_add_text(sub_tree, stub_tvb, offset,
|
|
remaining,
|
|
"[Long frame (%d byte%s)]",
|
|
remaining,
|
|
plurality(remaining, "", "s"));
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
"[Long frame (%d byte%s)]",
|
|
remaining,
|
|
plurality(remaining, "", "s"));
|
|
|
|
}
|
|
} CATCH_NONFATAL_ERRORS {
|
|
/*
|
|
* Somebody threw an exception that means that there
|
|
* was a problem dissecting the payload; that means
|
|
* that a dissector was found, so we don't need to
|
|
* dissect the payload as data or update the protocol
|
|
* or info columns.
|
|
*
|
|
* Just show the exception and then drive on to show
|
|
* the authentication padding.
|
|
*/
|
|
show_exception(stub_tvb, pinfo, tree, EXCEPT_CODE, GET_MESSAGE);
|
|
} ENDTRY;
|
|
}
|
|
|
|
/* If there is auth padding at the end of the stub, display it */
|
|
if (auth_pad_len != 0) {
|
|
proto_tree_add_text(sub_tree, decrypted_tvb, auth_pad_offset,
|
|
auth_pad_len,
|
|
"Auth Padding (%u byte%s)",
|
|
auth_pad_len,
|
|
plurality(auth_pad_len, "", "s"));
|
|
}
|
|
|
|
pinfo->current_proto = saved_proto;
|
|
} else {
|
|
/* No subdissector - show it as stub data. */
|
|
if (decrypted_tvb) {
|
|
show_stub_data(decrypted_tvb, 0, sub_tree, auth_info, FALSE);
|
|
} else {
|
|
show_stub_data(tvb, 0, sub_tree, auth_info, TRUE);
|
|
}
|
|
}
|
|
} else
|
|
show_stub_data(tvb, 0, sub_tree, auth_info, TRUE);
|
|
|
|
tap_queue_packet(dcerpc_tap, pinfo, info);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
dissect_dcerpc_verifier(tvbuff_t *tvb, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree, e_dce_cn_common_hdr_t *hdr,
|
|
dcerpc_auth_info *auth_info)
|
|
{
|
|
int auth_offset;
|
|
|
|
auth_info->auth_data = NULL;
|
|
|
|
if (auth_info->auth_size != 0) {
|
|
dcerpc_auth_subdissector_fns *auth_fns;
|
|
tvbuff_t *auth_tvb;
|
|
|
|
auth_offset = hdr->frag_len - hdr->auth_len;
|
|
|
|
auth_tvb = tvb_new_subset(tvb, auth_offset, hdr->auth_len,
|
|
hdr->auth_len);
|
|
|
|
auth_info->auth_data = auth_tvb;
|
|
|
|
if ((auth_fns = get_auth_subdissector_fns(auth_info->auth_level,
|
|
auth_info->auth_type))) {
|
|
/*
|
|
* Catch all bounds-error exceptions, so that even if the
|
|
* verifier is bad or we don't have all of it, we still
|
|
* show the stub data.
|
|
*/
|
|
TRY {
|
|
dissect_auth_verf(auth_tvb, pinfo, dcerpc_tree, auth_fns,
|
|
hdr, auth_info);
|
|
} CATCH_BOUNDS_ERRORS {
|
|
show_exception(auth_tvb, pinfo, dcerpc_tree, EXCEPT_CODE, GET_MESSAGE);
|
|
} ENDTRY;
|
|
} else {
|
|
proto_tree_add_text(dcerpc_tree, auth_tvb, 0, hdr->auth_len,
|
|
"Auth Verifier");
|
|
}
|
|
}
|
|
|
|
return hdr->auth_len;
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_cn_auth(tvbuff_t *tvb, int stub_offset, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree, e_dce_cn_common_hdr_t *hdr,
|
|
gboolean are_credentials, dcerpc_auth_info *auth_info)
|
|
{
|
|
volatile int offset;
|
|
|
|
/*
|
|
* Initially set auth_level and auth_type to zero to indicate that we
|
|
* haven't yet seen any authentication level information.
|
|
*/
|
|
auth_info->auth_level = 0;
|
|
auth_info->auth_type = 0;
|
|
auth_info->auth_size = 0;
|
|
auth_info->auth_pad_len = 0;
|
|
|
|
/*
|
|
* The authentication information is at the *end* of the PDU; in
|
|
* request and response PDUs, the request and response stub data
|
|
* come before it.
|
|
*
|
|
* Is there any authentication data (i.e., is the authentication length
|
|
* non-zero), and is the authentication length valid (i.e., is it, plus
|
|
* 8 bytes for the type/level/pad length/reserved/context id, less than
|
|
* or equal to the fragment length minus the starting offset of the
|
|
* stub data?)
|
|
*/
|
|
|
|
if (hdr->auth_len
|
|
&& ((hdr->auth_len + 8) <= (hdr->frag_len - stub_offset))) {
|
|
|
|
/*
|
|
* Yes, there is authentication data, and the length is valid.
|
|
* Do we have all the bytes of stub data?
|
|
* (If not, we'd throw an exception dissecting *that*, so don't
|
|
* bother trying to dissect the authentication information and
|
|
* throwing another exception there.)
|
|
*/
|
|
offset = hdr->frag_len - (hdr->auth_len + 8);
|
|
if (offset == 0 || tvb_offset_exists(tvb, offset - 1)) {
|
|
/*
|
|
* Either there's no stub data, or the last byte of the stub
|
|
* data is present in the captured data, so we shouldn't
|
|
* get a BoundsError dissecting the stub data.
|
|
*
|
|
* Try dissecting the authentication data.
|
|
* Catch all exceptions, so that even if the auth info is bad
|
|
* or we don't have all of it, we still show the stuff we
|
|
* dissect after this, such as stub data.
|
|
*/
|
|
TRY {
|
|
offset = dissect_dcerpc_uint8(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_auth_type,
|
|
&auth_info->auth_type);
|
|
offset = dissect_dcerpc_uint8(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_auth_level,
|
|
&auth_info->auth_level);
|
|
|
|
offset = dissect_dcerpc_uint8(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_auth_pad_len,
|
|
&auth_info->auth_pad_len);
|
|
offset = dissect_dcerpc_uint8(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_auth_rsrvd, NULL);
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_auth_ctx_id, NULL);
|
|
|
|
/*
|
|
* Dissect the authentication data.
|
|
*/
|
|
if (are_credentials) {
|
|
tvbuff_t *auth_tvb;
|
|
dcerpc_auth_subdissector_fns *auth_fns;
|
|
|
|
auth_tvb = tvb_new_subset(tvb, offset,
|
|
MIN(hdr->auth_len,tvb_reported_length_remaining(tvb, offset)),
|
|
hdr->auth_len);
|
|
|
|
if ((auth_fns = get_auth_subdissector_fns(auth_info->auth_level,
|
|
auth_info->auth_type)))
|
|
dissect_auth_verf(auth_tvb, pinfo, dcerpc_tree, auth_fns,
|
|
hdr, auth_info);
|
|
else
|
|
proto_tree_add_text(dcerpc_tree, tvb, offset, hdr->auth_len,
|
|
"Auth Credentials");
|
|
}
|
|
|
|
/* Compute the size of the auth block. Note that this should not
|
|
include auth padding, since when NTLMSSP encryption is used, the
|
|
padding is actually inside the encrypted stub */
|
|
auth_info->auth_size = hdr->auth_len + 8;
|
|
} CATCH_BOUNDS_ERRORS {
|
|
show_exception(tvb, pinfo, dcerpc_tree, EXCEPT_CODE, GET_MESSAGE);
|
|
} ENDTRY;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* We need to hash in the SMB fid number to generate a unique hash table
|
|
* key as DCERPC over SMB allows several pipes over the same TCP/IP
|
|
* socket.
|
|
* We pass this function the transport type here to make sure we only look
|
|
* at this function if it came across an SMB pipe.
|
|
* Other transports might need to mix in their own extra multiplexing data
|
|
* as well in the future.
|
|
*/
|
|
|
|
guint64
|
|
dcerpc_get_transport_salt(packet_info *pinfo)
|
|
{
|
|
dcerpc_decode_as_data* decode_data = dcerpc_get_decode_data(pinfo);
|
|
|
|
switch (decode_data->dcetransporttype) {
|
|
case DCE_CN_TRANSPORT_SMBPIPE:
|
|
/* DCERPC over smb */
|
|
return decode_data->dcetransportsalt;
|
|
}
|
|
|
|
/* Some other transport... */
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
dcerpc_set_transport_salt(guint64 dcetransportsalt, packet_info *pinfo)
|
|
{
|
|
dcerpc_decode_as_data* decode_data = dcerpc_get_decode_data(pinfo);
|
|
|
|
decode_data->dcetransportsalt = dcetransportsalt;
|
|
}
|
|
|
|
/*
|
|
* Connection oriented packet types
|
|
*/
|
|
|
|
static void
|
|
dissect_dcerpc_cn_bind(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree, e_dce_cn_common_hdr_t *hdr)
|
|
{
|
|
conversation_t *conv = find_or_create_conversation(pinfo);
|
|
guint8 num_ctx_items = 0;
|
|
guint i;
|
|
guint16 ctx_id;
|
|
guint8 num_trans_items;
|
|
guint j;
|
|
e_guid_t if_id;
|
|
e_guid_t trans_id;
|
|
guint32 trans_ver;
|
|
guint16 if_ver, if_ver_minor;
|
|
dcerpc_auth_info auth_info;
|
|
char *uuid_str;
|
|
const char *uuid_name = NULL;
|
|
proto_item *iface_item = NULL;
|
|
dcerpc_decode_as_data* decode_data = dcerpc_get_decode_data(pinfo);
|
|
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_max_xmit, NULL);
|
|
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_max_recv, NULL);
|
|
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_assoc_group, NULL);
|
|
|
|
offset = dissect_dcerpc_uint8(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_num_ctx_items, &num_ctx_items);
|
|
|
|
/* padding */
|
|
offset += 3;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", %u context items:", num_ctx_items);
|
|
|
|
for (i = 0; i < num_ctx_items; i++) {
|
|
proto_item *ctx_item = NULL;
|
|
proto_tree *ctx_tree = NULL, *iface_tree = NULL;
|
|
gint ctx_offset = offset;
|
|
|
|
dissect_dcerpc_uint16(tvb, offset, pinfo, NULL, hdr->drep,
|
|
hf_dcerpc_cn_ctx_id, &ctx_id);
|
|
|
|
/* save context ID for use with dcerpc_add_conv_to_bind_table() */
|
|
/* (if we have multiple contexts, this might cause "decode as"
|
|
* to behave unpredictably) */
|
|
decode_data->dcectxid = ctx_id;
|
|
|
|
if (dcerpc_tree) {
|
|
ctx_item = proto_tree_add_item(dcerpc_tree, hf_dcerpc_cn_ctx_item,
|
|
tvb, offset, 0,
|
|
ENC_NA);
|
|
ctx_tree = proto_item_add_subtree(ctx_item, ett_dcerpc_cn_ctx);
|
|
}
|
|
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, ctx_tree, hdr->drep,
|
|
hf_dcerpc_cn_ctx_id, &ctx_id);
|
|
offset = dissect_dcerpc_uint8(tvb, offset, pinfo, ctx_tree, hdr->drep,
|
|
hf_dcerpc_cn_num_trans_items, &num_trans_items);
|
|
|
|
if (dcerpc_tree) {
|
|
proto_item_append_text(ctx_item, "[%u]: Context ID:%u", i+1, ctx_id);
|
|
}
|
|
|
|
/* padding */
|
|
offset += 1;
|
|
|
|
dcerpc_tvb_get_uuid(tvb, offset, hdr->drep, &if_id);
|
|
if (ctx_tree) {
|
|
|
|
iface_item = proto_tree_add_item(ctx_tree, hf_dcerpc_cn_bind_abstract_syntax, tvb, offset, 0, ENC_NA);
|
|
iface_tree = proto_item_add_subtree(iface_item, ett_dcerpc_cn_iface);
|
|
|
|
uuid_str = guid_to_str(wmem_packet_scope(), (e_guid_t*)&if_id);
|
|
uuid_name = guids_get_uuid_name(&if_id);
|
|
if (uuid_name) {
|
|
proto_tree_add_guid_format(iface_tree, hf_dcerpc_cn_bind_if_id, tvb,
|
|
offset, 16, (e_guid_t *) &if_id, "Interface: %s UUID: %s", uuid_name, uuid_str);
|
|
proto_item_append_text(iface_item, ": %s", uuid_name);
|
|
proto_item_append_text(ctx_item, ", %s", uuid_name);
|
|
} else {
|
|
proto_tree_add_guid_format(iface_tree, hf_dcerpc_cn_bind_if_id, tvb,
|
|
offset, 16, (e_guid_t *) &if_id, "Interface UUID: %s", uuid_str);
|
|
proto_item_append_text(iface_item, ": %s", uuid_str);
|
|
proto_item_append_text(ctx_item, ", %s", uuid_str);
|
|
}
|
|
}
|
|
offset += 16;
|
|
|
|
if (hdr->drep[0] & DREP_LITTLE_ENDIAN) {
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, iface_tree, hdr->drep,
|
|
hf_dcerpc_cn_bind_if_ver, &if_ver);
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, iface_tree, hdr->drep,
|
|
hf_dcerpc_cn_bind_if_ver_minor, &if_ver_minor);
|
|
} else {
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, iface_tree, hdr->drep,
|
|
hf_dcerpc_cn_bind_if_ver_minor, &if_ver_minor);
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, iface_tree, hdr->drep,
|
|
hf_dcerpc_cn_bind_if_ver, &if_ver);
|
|
}
|
|
|
|
if (ctx_tree) {
|
|
proto_item_append_text(iface_item, " V%u.%u", if_ver, if_ver_minor);
|
|
proto_item_set_len(iface_item, 20);
|
|
}
|
|
|
|
memset(&trans_id, 0, sizeof(trans_id));
|
|
for (j = 0; j < num_trans_items; j++) {
|
|
proto_tree *trans_tree = NULL;
|
|
proto_item *trans_item = NULL;
|
|
proto_item *uuid_item = NULL;
|
|
|
|
dcerpc_tvb_get_uuid(tvb, offset, hdr->drep, &trans_id);
|
|
if (ctx_tree) {
|
|
|
|
trans_item = proto_tree_add_item(ctx_tree, hf_dcerpc_cn_bind_trans_syntax, tvb, offset, 0, ENC_NA);
|
|
trans_tree = proto_item_add_subtree(trans_item, ett_dcerpc_cn_trans_syntax);
|
|
|
|
uuid_str = guid_to_str(wmem_packet_scope(), (e_guid_t *) &trans_id);
|
|
uuid_name = guids_get_uuid_name(&trans_id);
|
|
|
|
if (uuid_name) {
|
|
uuid_item = proto_tree_add_guid_format(trans_tree, hf_dcerpc_cn_bind_trans_id, tvb, offset, 16, (e_guid_t *) &trans_id, "Transfer Syntax: %s UUID:%s", uuid_name, uuid_str);
|
|
proto_item_append_text(trans_item, "[%u]: %s", j+1, uuid_name);
|
|
proto_item_append_text(ctx_item, ", %s", uuid_name);
|
|
} else {
|
|
uuid_item = proto_tree_add_guid_format(trans_tree, hf_dcerpc_cn_bind_trans_id, tvb, offset, 16, (e_guid_t *) &trans_id, "Transfer Syntax: %s", uuid_str);
|
|
proto_item_append_text(trans_item, "[%u]: %s", j+1, uuid_str);
|
|
proto_item_append_text(ctx_item, ", %s", uuid_str);
|
|
}
|
|
|
|
/* check for [MS-RPCE] 3.3.1.5.3 Bind Time Feature Negotiation */
|
|
if (trans_id.data1 == 0x6cb71c2c && trans_id.data2 == 0x9812 && trans_id.data3 == 0x4540) {
|
|
proto_tree *uuid_tree = proto_item_add_subtree(uuid_item, ett_dcerpc_cn_trans_btfn);
|
|
proto_tree_add_boolean(uuid_tree, hf_dcerpc_cn_bind_trans_btfn_01, tvb, offset+8, 1, trans_id.data4[0]);
|
|
proto_tree_add_boolean(uuid_tree, hf_dcerpc_cn_bind_trans_btfn_02, tvb, offset+8, 1, trans_id.data4[0]);
|
|
}
|
|
}
|
|
offset += 16;
|
|
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, trans_tree, hdr->drep,
|
|
hf_dcerpc_cn_bind_trans_ver, &trans_ver);
|
|
if (ctx_tree) {
|
|
proto_item_set_len(trans_item, 20);
|
|
proto_item_append_text(trans_item, " V%u", trans_ver);
|
|
}
|
|
}
|
|
|
|
/* if this is the first time we've seen this packet, we need to
|
|
update the dcerpc_binds table so that any later calls can
|
|
match to the interface.
|
|
XXX We assume that BINDs will NEVER be fragmented.
|
|
*/
|
|
if (!(pinfo->fd->flags.visited)) {
|
|
dcerpc_bind_key *key;
|
|
dcerpc_bind_value *value;
|
|
|
|
key = (dcerpc_bind_key *)wmem_alloc(wmem_file_scope(), sizeof (dcerpc_bind_key));
|
|
key->conv = conv;
|
|
key->ctx_id = ctx_id;
|
|
key->transport_salt = dcerpc_get_transport_salt(pinfo);
|
|
|
|
value = (dcerpc_bind_value *)wmem_alloc(wmem_file_scope(), sizeof (dcerpc_bind_value));
|
|
value->uuid = if_id;
|
|
value->ver = if_ver;
|
|
value->transport = trans_id;
|
|
|
|
/* add this entry to the bind table */
|
|
g_hash_table_insert(dcerpc_binds, key, value);
|
|
}
|
|
|
|
if (i > 0)
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ",");
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " %s V%u.%u (%s)",
|
|
guids_resolve_guid_to_str(&if_id), if_ver, if_ver_minor,
|
|
guids_resolve_guid_to_str(&trans_id));
|
|
|
|
if (ctx_tree) {
|
|
proto_item_set_len(ctx_item, offset - ctx_offset);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* XXX - we should save the authentication type *if* we have
|
|
* an authentication header, and associate it with an authentication
|
|
* context, so subsequent PDUs can use that context.
|
|
*/
|
|
dissect_dcerpc_cn_auth(tvb, offset, pinfo, dcerpc_tree, hdr, TRUE, &auth_info);
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_cn_bind_ack(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree, e_dce_cn_common_hdr_t *hdr)
|
|
{
|
|
guint16 max_xmit, max_recv;
|
|
guint16 sec_addr_len;
|
|
guint8 num_results;
|
|
guint i;
|
|
guint16 result = 0;
|
|
guint16 reason = 0;
|
|
e_guid_t trans_id;
|
|
guint32 trans_ver;
|
|
dcerpc_auth_info auth_info;
|
|
const char *uuid_name = NULL;
|
|
const char *result_str = NULL;
|
|
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_max_xmit, &max_xmit);
|
|
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_max_recv, &max_recv);
|
|
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_assoc_group, NULL);
|
|
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_sec_addr_len, &sec_addr_len);
|
|
if (sec_addr_len != 0) {
|
|
proto_tree_add_item(dcerpc_tree, hf_dcerpc_cn_sec_addr, tvb, offset,
|
|
sec_addr_len, ENC_ASCII|ENC_NA);
|
|
offset += sec_addr_len;
|
|
}
|
|
|
|
if (offset % 4) {
|
|
offset += 4 - offset % 4;
|
|
}
|
|
|
|
offset = dissect_dcerpc_uint8(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_num_results, &num_results);
|
|
|
|
/* padding */
|
|
offset += 3;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", max_xmit: %u max_recv: %u, %u results:",
|
|
max_xmit, max_recv, num_results);
|
|
|
|
for (i = 0; i < num_results; i++) {
|
|
proto_tree *ctx_tree = NULL;
|
|
proto_item *ctx_item = NULL;
|
|
|
|
if (dcerpc_tree) {
|
|
ctx_tree = proto_tree_add_subtree_format(dcerpc_tree, tvb, offset, 24, ett_dcerpc_cn_ctx, &ctx_item, "Ctx Item[%u]:", i+1);
|
|
}
|
|
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, ctx_tree,
|
|
hdr->drep, hf_dcerpc_cn_ack_result,
|
|
&result);
|
|
|
|
/* [MS-RPCE] 3.3.1.5.3 check if this Ctx Item is the response to a Bind Time Feature Negotiation request */
|
|
if (result == 3) {
|
|
const int old_offset = offset;
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, ctx_tree, hdr->drep, hf_dcerpc_cn_ack_btfn, &reason);
|
|
proto_tree_add_boolean(ctx_tree, hf_dcerpc_cn_bind_trans_btfn_01, tvb, old_offset, 1, reason);
|
|
proto_tree_add_boolean(ctx_tree, hf_dcerpc_cn_bind_trans_btfn_02, tvb, old_offset, 1, reason);
|
|
} else if (result != 0) {
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, ctx_tree,
|
|
hdr->drep, hf_dcerpc_cn_ack_reason,
|
|
&reason);
|
|
} else {
|
|
/*
|
|
* The reason for rejection isn't meaningful, and often isn't
|
|
* set, when the syntax was accepted.
|
|
*/
|
|
offset += 2;
|
|
}
|
|
|
|
result_str = val_to_str(result, p_cont_result_vals, "Unknown result (%u)");
|
|
|
|
if (ctx_tree) {
|
|
dcerpc_tvb_get_uuid(tvb, offset, hdr->drep, &trans_id);
|
|
uuid_name = guids_get_uuid_name(&trans_id);
|
|
if (! uuid_name) {
|
|
uuid_name = guid_to_str(wmem_packet_scope(), (e_guid_t *) &trans_id);
|
|
}
|
|
proto_tree_add_guid_format(ctx_tree, hf_dcerpc_cn_ack_trans_id, tvb,
|
|
offset, 16, (e_guid_t *) &trans_id, "Transfer Syntax: %s",
|
|
uuid_name);
|
|
proto_item_append_text(ctx_item, " %s, %s", result_str, uuid_name);
|
|
}
|
|
offset += 16;
|
|
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, ctx_tree, hdr->drep,
|
|
hf_dcerpc_cn_ack_trans_ver, &trans_ver);
|
|
|
|
if (i > 0)
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ",");
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " %s", result_str);
|
|
}
|
|
|
|
/*
|
|
* XXX - do we need to do anything with the authentication level
|
|
* we get back from this?
|
|
*/
|
|
dissect_dcerpc_cn_auth(tvb, offset, pinfo, dcerpc_tree, hdr, TRUE, &auth_info);
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_cn_bind_nak(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree, e_dce_cn_common_hdr_t *hdr)
|
|
{
|
|
guint16 reason;
|
|
guint8 num_protocols;
|
|
guint i;
|
|
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_cn_reject_reason,
|
|
&reason);
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " reason: %s",
|
|
val_to_str(reason, reject_reason_vals, "Unknown (%u)"));
|
|
|
|
if (reason == PROTOCOL_VERSION_NOT_SUPPORTED) {
|
|
offset = dissect_dcerpc_uint8(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_num_protocols,
|
|
&num_protocols);
|
|
|
|
for (i = 0; i < num_protocols; i++) {
|
|
offset = dissect_dcerpc_uint8(tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_cn_protocol_ver_major,
|
|
NULL);
|
|
offset = dissect_dcerpc_uint8(tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_cn_protocol_ver_minor,
|
|
NULL);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Return a string describing a DCE/RPC fragment as first, middle, or end
|
|
fragment. */
|
|
|
|
#define PFC_FRAG_MASK 0x03
|
|
|
|
static const char *
|
|
fragment_type(guint8 flags)
|
|
{
|
|
static const char* t[4] = {
|
|
"Mid",
|
|
"1st",
|
|
"Last",
|
|
"Single"
|
|
};
|
|
return t[flags & PFC_FRAG_MASK];
|
|
}
|
|
|
|
/* Dissect stub data (payload) of a DCERPC packet. */
|
|
|
|
static void
|
|
dissect_dcerpc_cn_stub(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree, proto_tree *tree,
|
|
e_dce_cn_common_hdr_t *hdr, dcerpc_info *di,
|
|
dcerpc_auth_info *auth_info, guint32 alloc_hint _U_,
|
|
guint32 frame)
|
|
{
|
|
gint length, reported_length;
|
|
gboolean save_fragmented;
|
|
fragment_head *fd_head = NULL;
|
|
|
|
tvbuff_t *auth_tvb, *payload_tvb, *decrypted_tvb;
|
|
proto_item *pi;
|
|
proto_item *parent_pi;
|
|
proto_item *dcerpc_tree_item;
|
|
|
|
save_fragmented = pinfo->fragmented;
|
|
|
|
length = tvb_reported_length_remaining(tvb, offset);
|
|
reported_length = tvb_reported_length_remaining(tvb, offset);
|
|
if (reported_length < 0 ||
|
|
(guint32)reported_length < auth_info->auth_size) {
|
|
/* We don't even have enough bytes for the authentication
|
|
stuff. */
|
|
return;
|
|
}
|
|
reported_length -= auth_info->auth_size;
|
|
if (length > reported_length)
|
|
length = reported_length;
|
|
payload_tvb = tvb_new_subset(tvb, offset, length, reported_length);
|
|
|
|
auth_tvb = NULL;
|
|
/*don't bother if we don't have the entire tvb */
|
|
/*XXX we should really make sure we calculate auth_info->auth_data
|
|
and use that one instead of this auth_tvb hack
|
|
*/
|
|
if (tvb_captured_length(tvb) == tvb_reported_length(tvb)) {
|
|
if (tvb_reported_length_remaining(tvb, offset+length) > 8) {
|
|
auth_tvb = tvb_new_subset_remaining(tvb, offset+length+8);
|
|
}
|
|
}
|
|
|
|
/* Decrypt the PDU if it is encrypted */
|
|
|
|
if (auth_info->auth_type &&
|
|
(auth_info->auth_level == DCE_C_AUTHN_LEVEL_PKT_PRIVACY)) {
|
|
/*
|
|
* We know the authentication type, and the authentication
|
|
* level is "Packet privacy", meaning the payload is
|
|
* encrypted; attempt to decrypt it.
|
|
*/
|
|
dcerpc_auth_subdissector_fns *auth_fns;
|
|
|
|
/* Start out assuming we won't succeed in decrypting. */
|
|
decrypted_tvb = NULL;
|
|
/* Schannel needs information into the footer (verifier) in order to setup decryption keys
|
|
* so we call it in order to have a chance to decipher the data
|
|
*/
|
|
if (DCE_C_RPC_AUTHN_PROTOCOL_SEC_CHAN == auth_info->auth_type) {
|
|
dissect_dcerpc_cn_auth(tvb, offset, pinfo, dcerpc_tree, hdr, TRUE, auth_info);
|
|
}
|
|
|
|
if ((auth_fns = get_auth_subdissector_fns(
|
|
auth_info->auth_level, auth_info->auth_type))) {
|
|
tvbuff_t *result;
|
|
|
|
result = decode_encrypted_data(
|
|
payload_tvb, auth_tvb, pinfo, auth_fns,
|
|
hdr->ptype == PDU_REQ, auth_info);
|
|
|
|
if (result) {
|
|
if (dcerpc_tree)
|
|
proto_tree_add_text(
|
|
dcerpc_tree, payload_tvb, 0, -1,
|
|
"Encrypted stub data (%d byte%s)",
|
|
tvb_reported_length(payload_tvb),
|
|
|
|
plurality(tvb_reported_length(payload_tvb), "", "s"));
|
|
|
|
add_new_data_source(
|
|
pinfo, result, "Decrypted stub data");
|
|
|
|
/* We succeeded. */
|
|
decrypted_tvb = result;
|
|
}
|
|
}
|
|
} else
|
|
decrypted_tvb = payload_tvb;
|
|
|
|
/* if this packet is not fragmented, just dissect it and exit */
|
|
if (PFC_NOT_FRAGMENTED(hdr)) {
|
|
pinfo->fragmented = FALSE;
|
|
|
|
dcerpc_try_handoff(
|
|
pinfo, tree, dcerpc_tree, payload_tvb, decrypted_tvb,
|
|
hdr->drep, di, auth_info);
|
|
|
|
pinfo->fragmented = save_fragmented;
|
|
return;
|
|
}
|
|
|
|
/* The packet is fragmented. */
|
|
pinfo->fragmented = TRUE;
|
|
|
|
/* debug output of essential fragment data. */
|
|
/* leave it here for future debugging sessions */
|
|
/*printf("DCE num:%u offset:%u frag_len:%u tvb_len:%u\n",
|
|
pinfo->fd->num, offset, hdr->frag_len, tvb_reported_length(decrypted_tvb));*/
|
|
|
|
/* if we are not doing reassembly and this is the first fragment
|
|
then just dissect it and exit
|
|
XXX - if we're not doing reassembly, can we decrypt an
|
|
encrypted stub?
|
|
*/
|
|
if ( (!dcerpc_reassemble) && (hdr->flags & PFC_FIRST_FRAG) ) {
|
|
|
|
dcerpc_try_handoff(
|
|
pinfo, tree, dcerpc_tree, payload_tvb, decrypted_tvb,
|
|
hdr->drep, di, auth_info);
|
|
|
|
expert_add_info_format(pinfo, NULL, &ei_dcerpc_fragment, "%s fragment", fragment_type(hdr->flags));
|
|
|
|
pinfo->fragmented = save_fragmented;
|
|
return;
|
|
}
|
|
|
|
/* if we have already seen this packet, see if it was reassembled
|
|
and if so dissect the full pdu.
|
|
then exit
|
|
*/
|
|
if (pinfo->fd->flags.visited) {
|
|
fd_head = fragment_get_reassembled(&dcerpc_co_reassembly_table, frame);
|
|
goto end_cn_stub;
|
|
}
|
|
|
|
/* if we are not doing reassembly and it was neither a complete PDU
|
|
nor the first fragment then there is nothing more we can do
|
|
so we just have to exit
|
|
*/
|
|
if ( !dcerpc_reassemble || (tvb_captured_length(tvb) != tvb_reported_length(tvb)) )
|
|
goto end_cn_stub;
|
|
|
|
/* if we didn't get 'frame' we don't know where the PDU started and thus
|
|
it is pointless to continue
|
|
*/
|
|
if (!frame)
|
|
goto end_cn_stub;
|
|
|
|
/* from now on we must attempt to reassemble the PDU
|
|
*/
|
|
|
|
/* if we get here we know it is the first time we see the packet
|
|
and we also know it is only a fragment and not a full PDU,
|
|
thus we must reassemble it.
|
|
*/
|
|
|
|
/* Do we have any non-encrypted data to reassemble? */
|
|
if (decrypted_tvb == NULL) {
|
|
/* No. We can't even try to reassemble. */
|
|
goto end_cn_stub;
|
|
}
|
|
|
|
/* defragmentation is a bit tricky, as there's no offset of the fragment
|
|
* in the protocol data.
|
|
*
|
|
* just use fragment_add_seq_next() and hope that TCP/SMB segments coming
|
|
* in with the correct sequence.
|
|
*/
|
|
fd_head = fragment_add_seq_next(&dcerpc_co_reassembly_table,
|
|
decrypted_tvb, 0, pinfo, frame, NULL,
|
|
tvb_reported_length(decrypted_tvb),
|
|
hdr->flags&PFC_LAST_FRAG ? FALSE : TRUE /* more_frags */);
|
|
|
|
end_cn_stub:
|
|
|
|
/* if reassembly is complete and this is the last fragment
|
|
* (multiple fragments in one PDU are possible!)
|
|
* dissect the full PDU
|
|
*/
|
|
if (fd_head && (fd_head->flags & FD_DEFRAGMENTED) ) {
|
|
|
|
if ((pinfo->fd->num == fd_head->reassembled_in) && (hdr->flags & PFC_LAST_FRAG) ) {
|
|
tvbuff_t *next_tvb;
|
|
proto_item *frag_tree_item;
|
|
|
|
next_tvb = tvb_new_chain((decrypted_tvb)?decrypted_tvb:payload_tvb,
|
|
fd_head->tvb_data);
|
|
|
|
add_new_data_source(pinfo, next_tvb, "Reassembled DCE/RPC");
|
|
show_fragment_tree(fd_head, &dcerpc_frag_items,
|
|
tree, pinfo, next_tvb, &frag_tree_item);
|
|
/* the toplevel fragment subtree is now behind all desegmented data,
|
|
* move it right behind the DCE/RPC tree */
|
|
dcerpc_tree_item = proto_tree_get_parent(dcerpc_tree);
|
|
if (frag_tree_item && dcerpc_tree_item) {
|
|
proto_tree_move_item(tree, dcerpc_tree_item, frag_tree_item);
|
|
}
|
|
|
|
pinfo->fragmented = FALSE;
|
|
|
|
expert_add_info_format(pinfo, frag_tree_item, &ei_dcerpc_fragment_reassembled, "%s fragment, reassembled", fragment_type(hdr->flags));
|
|
|
|
dcerpc_try_handoff(pinfo, tree, dcerpc_tree, next_tvb,
|
|
next_tvb, hdr->drep, di, auth_info);
|
|
|
|
} else {
|
|
if (decrypted_tvb) {
|
|
pi = proto_tree_add_uint(dcerpc_tree, hf_dcerpc_reassembled_in,
|
|
decrypted_tvb, 0, 0, fd_head->reassembled_in);
|
|
} else {
|
|
pi = proto_tree_add_uint(dcerpc_tree, hf_dcerpc_reassembled_in,
|
|
payload_tvb, 0, 0, fd_head->reassembled_in);
|
|
}
|
|
PROTO_ITEM_SET_GENERATED(pi);
|
|
parent_pi = proto_tree_get_parent(dcerpc_tree);
|
|
if (parent_pi != NULL) {
|
|
proto_item_append_text(parent_pi, ", [Reas: #%u]", fd_head->reassembled_in);
|
|
}
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
" [DCE/RPC %s fragment, reas: #%u]", fragment_type(hdr->flags), fd_head->reassembled_in);
|
|
expert_add_info_format(pinfo, NULL, &ei_dcerpc_fragment_reassembled, "%s fragment, reassembled in #%u", fragment_type(hdr->flags), fd_head->reassembled_in);
|
|
}
|
|
} else {
|
|
/* Reassembly not complete - some fragments
|
|
are missing. Just show the stub data. */
|
|
expert_add_info_format(pinfo, NULL, &ei_dcerpc_fragment, "%s fragment", fragment_type(hdr->flags));
|
|
|
|
if (decrypted_tvb) {
|
|
show_stub_data(decrypted_tvb, 0, tree, auth_info, FALSE);
|
|
} else {
|
|
show_stub_data(payload_tvb, 0, tree, auth_info, TRUE);
|
|
}
|
|
}
|
|
|
|
pinfo->fragmented = save_fragmented;
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_cn_rqst(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree, proto_tree *tree,
|
|
e_dce_cn_common_hdr_t *hdr)
|
|
{
|
|
conversation_t *conv;
|
|
guint16 ctx_id;
|
|
guint16 opnum;
|
|
e_guid_t obj_id = DCERPC_UUID_NULL;
|
|
dcerpc_auth_info auth_info;
|
|
guint32 alloc_hint;
|
|
proto_item *pi;
|
|
proto_item *parent_pi;
|
|
dcerpc_decode_as_data* decode_data = dcerpc_get_decode_data(pinfo);
|
|
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_alloc_hint, &alloc_hint);
|
|
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_ctx_id, &ctx_id);
|
|
parent_pi = proto_tree_get_parent(dcerpc_tree);
|
|
if (parent_pi != NULL) {
|
|
proto_item_append_text(parent_pi, ", Ctx: %u", ctx_id);
|
|
}
|
|
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_opnum, &opnum);
|
|
|
|
/* save context ID for use with dcerpc_add_conv_to_bind_table() */
|
|
decode_data->dcectxid = ctx_id;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", opnum: %u, Ctx: %u",
|
|
opnum, ctx_id);
|
|
|
|
if (hdr->flags & PFC_OBJECT_UUID) {
|
|
dcerpc_tvb_get_uuid(tvb, offset, hdr->drep, &obj_id);
|
|
if (dcerpc_tree) {
|
|
proto_tree_add_guid_format(dcerpc_tree, hf_dcerpc_obj_id, tvb,
|
|
offset, 16, (e_guid_t *) &obj_id, "Object UUID: %s",
|
|
guid_to_str(wmem_packet_scope(), (e_guid_t *) &obj_id));
|
|
}
|
|
offset += 16;
|
|
}
|
|
|
|
/*
|
|
* XXX - what if this was set when the connection was set up,
|
|
* and we just have a security context?
|
|
*/
|
|
dissect_dcerpc_cn_auth(tvb, offset, pinfo, dcerpc_tree, hdr, FALSE, &auth_info);
|
|
|
|
conv = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst, pinfo->ptype,
|
|
pinfo->srcport, pinfo->destport, 0);
|
|
if (!conv)
|
|
show_stub_data(tvb, offset, dcerpc_tree, &auth_info, TRUE);
|
|
else {
|
|
dcerpc_matched_key matched_key, *new_matched_key;
|
|
dcerpc_call_value *value;
|
|
|
|
/* !!! we can NOT check flags.visited here since this will interact
|
|
badly with when SMB handles (i.e. calls the subdissector)
|
|
and desegmented pdu's .
|
|
Instead we check if this pdu is already in the matched table or not
|
|
*/
|
|
matched_key.frame = pinfo->fd->num;
|
|
matched_key.call_id = hdr->call_id;
|
|
value = (dcerpc_call_value *)g_hash_table_lookup(dcerpc_matched, &matched_key);
|
|
if (!value) {
|
|
dcerpc_bind_key bind_key;
|
|
dcerpc_bind_value *bind_value;
|
|
|
|
bind_key.conv = conv;
|
|
bind_key.ctx_id = ctx_id;
|
|
bind_key.transport_salt = dcerpc_get_transport_salt(pinfo);
|
|
|
|
if ((bind_value = (dcerpc_bind_value *)g_hash_table_lookup(dcerpc_binds, &bind_key)) ) {
|
|
if (!(hdr->flags&PFC_FIRST_FRAG)) {
|
|
dcerpc_cn_call_key call_key;
|
|
dcerpc_call_value *call_value;
|
|
|
|
call_key.conv = conv;
|
|
call_key.call_id = hdr->call_id;
|
|
call_key.transport_salt = dcerpc_get_transport_salt(pinfo);
|
|
if ((call_value = (dcerpc_call_value *)g_hash_table_lookup(dcerpc_cn_calls, &call_key))) {
|
|
new_matched_key = (dcerpc_matched_key *)wmem_alloc(wmem_file_scope(), sizeof (dcerpc_matched_key));
|
|
*new_matched_key = matched_key;
|
|
g_hash_table_insert(dcerpc_matched, new_matched_key, call_value);
|
|
value = call_value;
|
|
}
|
|
} else {
|
|
dcerpc_cn_call_key *call_key;
|
|
dcerpc_call_value *call_value;
|
|
|
|
/* We found the binding and it is the first fragment
|
|
(or a complete PDU) of a dcerpc pdu so just add
|
|
the call to both the call table and the
|
|
matched table
|
|
*/
|
|
call_key = (dcerpc_cn_call_key *)wmem_alloc(wmem_file_scope(), sizeof (dcerpc_cn_call_key));
|
|
call_key->conv = conv;
|
|
call_key->call_id = hdr->call_id;
|
|
call_key->transport_salt = dcerpc_get_transport_salt(pinfo);
|
|
|
|
/* if there is already a matching call in the table
|
|
remove it so it is replaced with the new one */
|
|
if (g_hash_table_lookup(dcerpc_cn_calls, call_key)) {
|
|
g_hash_table_remove(dcerpc_cn_calls, call_key);
|
|
}
|
|
|
|
call_value = (dcerpc_call_value *)wmem_alloc(wmem_file_scope(), sizeof (dcerpc_call_value));
|
|
call_value->uuid = bind_value->uuid;
|
|
call_value->ver = bind_value->ver;
|
|
call_value->object_uuid = obj_id;
|
|
call_value->opnum = opnum;
|
|
call_value->req_frame = pinfo->fd->num;
|
|
call_value->req_time = pinfo->fd->abs_ts;
|
|
call_value->rep_frame = 0;
|
|
call_value->max_ptr = 0;
|
|
call_value->se_data = NULL;
|
|
call_value->private_data = NULL;
|
|
call_value->pol = NULL;
|
|
call_value->flags = 0;
|
|
if (!memcmp(&bind_value->transport, &uuid_ndr64, sizeof(uuid_ndr64))) {
|
|
call_value->flags |= DCERPC_IS_NDR64;
|
|
}
|
|
|
|
g_hash_table_insert(dcerpc_cn_calls, call_key, call_value);
|
|
|
|
new_matched_key = (dcerpc_matched_key *)wmem_alloc(wmem_file_scope(), sizeof (dcerpc_matched_key));
|
|
*new_matched_key = matched_key;
|
|
g_hash_table_insert(dcerpc_matched, new_matched_key, call_value);
|
|
value = call_value;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (value) {
|
|
dcerpc_info *di;
|
|
|
|
di = wmem_new0(wmem_packet_scope(), dcerpc_info);
|
|
/* handoff this call */
|
|
di->dcerpc_procedure_name = "";
|
|
di->conv = conv;
|
|
di->call_id = hdr->call_id;
|
|
di->transport_salt = dcerpc_get_transport_salt(pinfo);
|
|
di->ptype = PDU_REQ;
|
|
di->call_data = value;
|
|
di->hf_index = -1;
|
|
|
|
if (value->rep_frame != 0) {
|
|
pi = proto_tree_add_uint(dcerpc_tree, hf_dcerpc_response_in,
|
|
tvb, 0, 0, value->rep_frame);
|
|
PROTO_ITEM_SET_GENERATED(pi);
|
|
if (parent_pi != NULL) {
|
|
proto_item_append_text(parent_pi, ", [Resp: #%u]", value->rep_frame);
|
|
}
|
|
}
|
|
|
|
dissect_dcerpc_cn_stub(tvb, offset, pinfo, dcerpc_tree, tree,
|
|
hdr, di, &auth_info, alloc_hint,
|
|
value->req_frame);
|
|
} else {
|
|
/* no bind information, simply show stub data */
|
|
proto_tree_add_expert_format(dcerpc_tree, pinfo, &ei_dcerpc_cn_ctx_id_no_bind, tvb, offset, 0, "No bind info for interface Context ID %u - capture start too late?", ctx_id);
|
|
show_stub_data(tvb, offset, dcerpc_tree, &auth_info, TRUE);
|
|
}
|
|
}
|
|
|
|
/* Dissect the verifier */
|
|
dissect_dcerpc_verifier(tvb, pinfo, dcerpc_tree, hdr, &auth_info);
|
|
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_cn_resp(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree, proto_tree *tree,
|
|
e_dce_cn_common_hdr_t *hdr)
|
|
{
|
|
dcerpc_call_value *value = NULL;
|
|
conversation_t *conv;
|
|
guint16 ctx_id;
|
|
dcerpc_auth_info auth_info;
|
|
guint32 alloc_hint;
|
|
proto_item *pi;
|
|
proto_item *parent_pi;
|
|
e_guid_t obj_id_null = DCERPC_UUID_NULL;
|
|
dcerpc_decode_as_data* decode_data = dcerpc_get_decode_data(pinfo);
|
|
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_alloc_hint, &alloc_hint);
|
|
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_ctx_id, &ctx_id);
|
|
parent_pi = proto_tree_get_parent(dcerpc_tree);
|
|
if (parent_pi != NULL) {
|
|
proto_item_append_text(parent_pi, ", Ctx: %u", ctx_id);
|
|
}
|
|
|
|
/* save context ID for use with dcerpc_add_conv_to_bind_table() */
|
|
decode_data->dcectxid = ctx_id;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", Ctx: %u", ctx_id);
|
|
|
|
offset = dissect_dcerpc_uint8(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_cancel_count, NULL);
|
|
/* padding */
|
|
offset++;
|
|
|
|
/*
|
|
* XXX - what if this was set when the connection was set up,
|
|
* and we just have a security context?
|
|
*/
|
|
dissect_dcerpc_cn_auth(tvb, offset, pinfo, dcerpc_tree, hdr, FALSE, &auth_info);
|
|
|
|
conv = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst, pinfo->ptype,
|
|
pinfo->srcport, pinfo->destport, 0);
|
|
|
|
if (!conv) {
|
|
/* no point in creating one here, really */
|
|
show_stub_data(tvb, offset, dcerpc_tree, &auth_info, TRUE);
|
|
} else {
|
|
dcerpc_matched_key matched_key, *new_matched_key;
|
|
|
|
/* !!! we can NOT check flags.visited here since this will interact
|
|
badly with when SMB handles (i.e. calls the subdissector)
|
|
and desegmented pdu's .
|
|
Instead we check if this pdu is already in the matched table or not
|
|
*/
|
|
matched_key.frame = pinfo->fd->num;
|
|
matched_key.call_id = hdr->call_id;
|
|
value = (dcerpc_call_value *)g_hash_table_lookup(dcerpc_matched, &matched_key);
|
|
if (!value) {
|
|
dcerpc_cn_call_key call_key;
|
|
dcerpc_call_value *call_value;
|
|
|
|
call_key.conv = conv;
|
|
call_key.call_id = hdr->call_id;
|
|
call_key.transport_salt = dcerpc_get_transport_salt(pinfo);
|
|
|
|
if ((call_value = (dcerpc_call_value *)g_hash_table_lookup(dcerpc_cn_calls, &call_key))) {
|
|
/* extra sanity check, only match them if the reply
|
|
came after the request */
|
|
if (call_value->req_frame<pinfo->fd->num) {
|
|
new_matched_key = (dcerpc_matched_key *)wmem_alloc(wmem_file_scope(), sizeof (dcerpc_matched_key));
|
|
*new_matched_key = matched_key;
|
|
g_hash_table_insert(dcerpc_matched, new_matched_key, call_value);
|
|
value = call_value;
|
|
if (call_value->rep_frame == 0) {
|
|
call_value->rep_frame = pinfo->fd->num;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (value) {
|
|
dcerpc_info *di;
|
|
|
|
di = wmem_new0(wmem_packet_scope(), dcerpc_info);
|
|
/* handoff this call */
|
|
di->dcerpc_procedure_name = "";
|
|
di->conv = conv;
|
|
di->call_id = hdr->call_id;
|
|
di->transport_salt = dcerpc_get_transport_salt(pinfo);
|
|
di->ptype = PDU_RESP;
|
|
di->call_data = value;
|
|
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_opnum, tvb, 0, 0, value->opnum);
|
|
|
|
/* (optional) "Object UUID" from request */
|
|
if (dcerpc_tree && (memcmp(&value->object_uuid, &obj_id_null, sizeof(obj_id_null)) != 0)) {
|
|
pi = proto_tree_add_guid_format(dcerpc_tree, hf_dcerpc_obj_id, tvb,
|
|
offset, 0, (e_guid_t *) &value->object_uuid, "Object UUID: %s",
|
|
guid_to_str(wmem_packet_scope(), (e_guid_t *) &value->object_uuid));
|
|
PROTO_ITEM_SET_GENERATED(pi);
|
|
}
|
|
|
|
/* request in */
|
|
if (value->req_frame != 0) {
|
|
nstime_t delta_ts;
|
|
pi = proto_tree_add_uint(dcerpc_tree, hf_dcerpc_request_in,
|
|
tvb, 0, 0, value->req_frame);
|
|
PROTO_ITEM_SET_GENERATED(pi);
|
|
if (parent_pi != NULL) {
|
|
proto_item_append_text(parent_pi, ", [Req: #%u]", value->req_frame);
|
|
}
|
|
nstime_delta(&delta_ts, &pinfo->fd->abs_ts, &value->req_time);
|
|
pi = proto_tree_add_time(dcerpc_tree, hf_dcerpc_time, tvb, offset, 0, &delta_ts);
|
|
PROTO_ITEM_SET_GENERATED(pi);
|
|
} else {
|
|
proto_tree_add_expert(dcerpc_tree, pinfo, &ei_dcerpc_no_request_found, tvb, 0, 0);
|
|
}
|
|
|
|
dissect_dcerpc_cn_stub(tvb, offset, pinfo, dcerpc_tree, tree,
|
|
hdr, di, &auth_info, alloc_hint,
|
|
value->rep_frame);
|
|
} else {
|
|
/* no bind information, simply show stub data */
|
|
proto_tree_add_expert_format(dcerpc_tree, pinfo, &ei_dcerpc_cn_ctx_id_no_bind, tvb, offset, 0, "No bind info for interface Context ID %u - capture start too late?", ctx_id);
|
|
show_stub_data(tvb, offset, dcerpc_tree, &auth_info, TRUE);
|
|
}
|
|
}
|
|
|
|
/* Dissect the verifier */
|
|
dissect_dcerpc_verifier(tvb, pinfo, dcerpc_tree, hdr, &auth_info);
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_cn_fault(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree, e_dce_cn_common_hdr_t *hdr)
|
|
{
|
|
dcerpc_call_value *value = NULL;
|
|
conversation_t *conv;
|
|
guint16 ctx_id;
|
|
guint32 status;
|
|
guint32 alloc_hint;
|
|
dcerpc_auth_info auth_info;
|
|
proto_item *pi = NULL;
|
|
dcerpc_decode_as_data* decode_data = dcerpc_get_decode_data(pinfo);
|
|
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_alloc_hint, &alloc_hint);
|
|
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_ctx_id, &ctx_id);
|
|
|
|
offset = dissect_dcerpc_uint8(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_cancel_count, NULL);
|
|
/* padding */
|
|
offset++;
|
|
|
|
#if 0
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_status, &status);
|
|
#endif
|
|
status = ((hdr->drep[0] & DREP_LITTLE_ENDIAN)
|
|
? tvb_get_letohl(tvb, offset)
|
|
: tvb_get_ntohl(tvb, offset));
|
|
|
|
pi = proto_tree_add_item(dcerpc_tree, hf_dcerpc_cn_status, tvb, offset, 4, DREP_ENC_INTEGER(hdr->drep));
|
|
offset+=4;
|
|
|
|
expert_add_info_format(pinfo, pi, &ei_dcerpc_cn_status, "Fault: %s", val_to_str(status, reject_status_vals, "Unknown (0x%08x)"));
|
|
|
|
/* save context ID for use with dcerpc_add_conv_to_bind_table() */
|
|
decode_data->dcectxid = ctx_id;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
", Ctx: %u, status: %s", ctx_id,
|
|
val_to_str(status, reject_status_vals,
|
|
"Unknown (0x%08x)"));
|
|
|
|
/* padding */
|
|
offset += 4;
|
|
|
|
/*
|
|
* XXX - what if this was set when the connection was set up,
|
|
* and we just have a security context?
|
|
*/
|
|
dissect_dcerpc_cn_auth(tvb, offset, pinfo, dcerpc_tree, hdr, FALSE, &auth_info);
|
|
|
|
conv = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst, pinfo->ptype,
|
|
pinfo->srcport, pinfo->destport, 0);
|
|
if (!conv) {
|
|
/* no point in creating one here, really */
|
|
} else {
|
|
dcerpc_matched_key matched_key, *new_matched_key;
|
|
|
|
/* !!! we can NOT check flags.visited here since this will interact
|
|
badly with when SMB handles (i.e. calls the subdissector)
|
|
and desegmented pdu's .
|
|
Instead we check if this pdu is already in the matched table or not
|
|
*/
|
|
matched_key.frame = pinfo->fd->num;
|
|
matched_key.call_id = hdr->call_id;
|
|
value = (dcerpc_call_value *)g_hash_table_lookup(dcerpc_matched, &matched_key);
|
|
if (!value) {
|
|
dcerpc_cn_call_key call_key;
|
|
dcerpc_call_value *call_value;
|
|
|
|
call_key.conv = conv;
|
|
call_key.call_id = hdr->call_id;
|
|
call_key.transport_salt = dcerpc_get_transport_salt(pinfo);
|
|
|
|
if ((call_value = (dcerpc_call_value *)g_hash_table_lookup(dcerpc_cn_calls, &call_key))) {
|
|
new_matched_key = (dcerpc_matched_key *)wmem_alloc(wmem_file_scope(), sizeof (dcerpc_matched_key));
|
|
*new_matched_key = matched_key;
|
|
g_hash_table_insert(dcerpc_matched, new_matched_key, call_value);
|
|
|
|
value = call_value;
|
|
if (call_value->rep_frame == 0) {
|
|
call_value->rep_frame = pinfo->fd->num;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
if (value) {
|
|
int length, stub_length;
|
|
dcerpc_info *di;
|
|
proto_item *parent_pi;
|
|
|
|
di = wmem_new0(wmem_packet_scope(), dcerpc_info);
|
|
/* handoff this call */
|
|
di->dcerpc_procedure_name = "";
|
|
di->conv = conv;
|
|
di->call_id = hdr->call_id;
|
|
di->transport_salt = dcerpc_get_transport_salt(pinfo);
|
|
di->ptype = PDU_FAULT;
|
|
di->call_data = value;
|
|
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_opnum, tvb, 0, 0, value->opnum);
|
|
if (value->req_frame != 0) {
|
|
nstime_t delta_ts;
|
|
pi = proto_tree_add_uint(dcerpc_tree, hf_dcerpc_request_in,
|
|
tvb, 0, 0, value->req_frame);
|
|
PROTO_ITEM_SET_GENERATED(pi);
|
|
parent_pi = proto_tree_get_parent(dcerpc_tree);
|
|
if (parent_pi != NULL) {
|
|
proto_item_append_text(parent_pi, ", [Req: #%u]", value->req_frame);
|
|
}
|
|
nstime_delta(&delta_ts, &pinfo->fd->abs_ts, &value->req_time);
|
|
pi = proto_tree_add_time(dcerpc_tree, hf_dcerpc_time, tvb, offset, 0, &delta_ts);
|
|
PROTO_ITEM_SET_GENERATED(pi);
|
|
} else {
|
|
proto_tree_add_expert(dcerpc_tree, pinfo, &ei_dcerpc_no_request_found, tvb, 0, 0);
|
|
}
|
|
|
|
length = tvb_reported_length_remaining(tvb, offset);
|
|
/* as we now create a tvb in dissect_dcerpc_cn() containing only the
|
|
* stub_data, the following calculation is no longer valid:
|
|
* stub_length = hdr->frag_len - offset - auth_info.auth_size;
|
|
* simply use the remaining length of the tvb instead.
|
|
* XXX - or better use the reported_length?!?
|
|
*/
|
|
stub_length = length;
|
|
if (length > stub_length)
|
|
length = stub_length;
|
|
|
|
/* If we don't have reassembly enabled, or this packet contains
|
|
the entire PDU, or if we don't have all the data in this
|
|
fragment, just call the handoff directly if this is the
|
|
first fragment or the PDU isn't fragmented. */
|
|
if ( (!dcerpc_reassemble) || PFC_NOT_FRAGMENTED(hdr) ||
|
|
!tvb_bytes_exist(tvb, offset, stub_length) ) {
|
|
if (hdr->flags&PFC_FIRST_FRAG) {
|
|
/* First fragment, possibly the only fragment */
|
|
/*
|
|
* XXX - should there be a third routine for each
|
|
* function in an RPC subdissector, to handle
|
|
* fault responses? The DCE RPC 1.1 spec says
|
|
* three's "stub data" here, which I infer means
|
|
* that it's protocol-specific and call-specific.
|
|
*
|
|
* It should probably get passed the status code
|
|
* as well, as that might be protocol-specific.
|
|
*/
|
|
if (dcerpc_tree) {
|
|
if (stub_length > 0) {
|
|
proto_tree_add_text(dcerpc_tree, tvb, offset, stub_length,
|
|
"Fault stub data (%d byte%s)",
|
|
stub_length,
|
|
plurality(stub_length, "", "s"));
|
|
}
|
|
}
|
|
} else {
|
|
/* PDU is fragmented and this isn't the first fragment */
|
|
if (dcerpc_tree) {
|
|
if (stub_length > 0) {
|
|
proto_tree_add_text(dcerpc_tree, tvb, offset, stub_length,
|
|
"Fragment data (%d byte%s)",
|
|
stub_length,
|
|
plurality(stub_length, "", "s"));
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
/* Reassembly is enabled, the PDU is fragmented, and
|
|
we have all the data in the fragment; the first two
|
|
of those mean we should attempt reassembly, and the
|
|
third means we can attempt reassembly. */
|
|
if (dcerpc_tree) {
|
|
if (length > 0) {
|
|
proto_tree_add_text(dcerpc_tree, tvb, offset, stub_length,
|
|
"Fragment data (%d byte%s)",
|
|
stub_length,
|
|
plurality(stub_length, "", "s"));
|
|
}
|
|
}
|
|
if (hdr->flags&PFC_FIRST_FRAG) { /* FIRST fragment */
|
|
if ( (!pinfo->fd->flags.visited) && value->rep_frame ) {
|
|
fragment_add_seq_next(&dcerpc_co_reassembly_table,
|
|
tvb, offset,
|
|
pinfo, value->rep_frame, NULL,
|
|
stub_length,
|
|
TRUE);
|
|
}
|
|
} else if (hdr->flags&PFC_LAST_FRAG) { /* LAST fragment */
|
|
if ( value->rep_frame ) {
|
|
fragment_head *fd_head;
|
|
|
|
fd_head = fragment_add_seq_next(&dcerpc_co_reassembly_table,
|
|
tvb, offset,
|
|
pinfo, value->rep_frame, NULL,
|
|
stub_length,
|
|
TRUE);
|
|
|
|
if (fd_head) {
|
|
/* We completed reassembly */
|
|
tvbuff_t *next_tvb;
|
|
proto_item *frag_tree_item;
|
|
|
|
next_tvb = tvb_new_chain(tvb, fd_head->tvb_data);
|
|
add_new_data_source(pinfo, next_tvb, "Reassembled DCE/RPC");
|
|
show_fragment_tree(fd_head, &dcerpc_frag_items,
|
|
dcerpc_tree, pinfo, next_tvb, &frag_tree_item);
|
|
|
|
/*
|
|
* XXX - should there be a third routine for each
|
|
* function in an RPC subdissector, to handle
|
|
* fault responses? The DCE RPC 1.1 spec says
|
|
* three's "stub data" here, which I infer means
|
|
* that it's protocol-specific and call-specific.
|
|
*
|
|
* It should probably get passed the status code
|
|
* as well, as that might be protocol-specific.
|
|
*/
|
|
if (dcerpc_tree) {
|
|
if (length > 0) {
|
|
proto_tree_add_text(dcerpc_tree, tvb, offset, stub_length,
|
|
"Fault stub data (%d byte%s)",
|
|
stub_length,
|
|
plurality(stub_length, "", "s"));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else { /* MIDDLE fragment(s) */
|
|
if ( (!pinfo->fd->flags.visited) && value->rep_frame ) {
|
|
fragment_add_seq_next(&dcerpc_co_reassembly_table,
|
|
tvb, offset,
|
|
pinfo, value->rep_frame, NULL,
|
|
stub_length,
|
|
TRUE);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_cn_rts(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree, e_dce_cn_common_hdr_t *hdr)
|
|
{
|
|
proto_item *tf = NULL;
|
|
proto_item *parent_pi = NULL;
|
|
proto_tree *cn_rts_pdu_tree = NULL;
|
|
guint16 rts_flags;
|
|
guint16 commands_nb = 0;
|
|
guint32 *cmd;
|
|
guint32 i;
|
|
const char *info_str = NULL;
|
|
static const int * flags[] = {
|
|
&hf_dcerpc_cn_rts_flags_none,
|
|
&hf_dcerpc_cn_rts_flags_ping,
|
|
&hf_dcerpc_cn_rts_flags_other_cmd,
|
|
&hf_dcerpc_cn_rts_flags_recycle_channel,
|
|
&hf_dcerpc_cn_rts_flags_in_channel,
|
|
&hf_dcerpc_cn_rts_flags_out_channel,
|
|
&hf_dcerpc_cn_rts_flags_eof,
|
|
NULL
|
|
};
|
|
|
|
/* Dissect specific RTS header */
|
|
rts_flags = dcerpc_tvb_get_ntohs(tvb, offset, hdr->drep);
|
|
proto_tree_add_bitmask_value_with_flags(dcerpc_tree, tvb, offset, hf_dcerpc_cn_rts_flags,
|
|
ett_dcerpc_cn_rts_flags, flags, rts_flags, BMT_NO_APPEND);
|
|
offset += 2;
|
|
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_rts_commands_nb, &commands_nb);
|
|
|
|
/* Create the RTS PDU tree - we do not yet know its name */
|
|
cn_rts_pdu_tree = proto_tree_add_subtree_format(dcerpc_tree, tvb, offset, -1, ett_dcerpc_cn_rts_pdu, &tf, "RTS PDU: %u commands", commands_nb);
|
|
|
|
cmd = (guint32 *)wmem_alloc(wmem_packet_scope(), sizeof (guint32) * (commands_nb + 1));
|
|
|
|
/* Dissect commands */
|
|
for (i = 0; i < commands_nb; ++i) {
|
|
proto_tree *cn_rts_command_tree = NULL;
|
|
const guint32 command = dcerpc_tvb_get_ntohl(tvb, offset, hdr->drep);
|
|
cmd[i] = command;
|
|
tf = proto_tree_add_uint(cn_rts_pdu_tree, hf_dcerpc_cn_rts_command, tvb, offset, 4, command);
|
|
cn_rts_command_tree = proto_item_add_subtree(tf, ett_dcerpc_cn_rts_command);
|
|
offset += 4;
|
|
switch (command) {
|
|
case RTS_CMD_RECEIVEWINDOWSIZE:
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, cn_rts_command_tree, hdr->drep, hf_dcerpc_cn_rts_command_receivewindowsize, NULL);
|
|
break;
|
|
case RTS_CMD_FLOWCONTROLACK:
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, cn_rts_command_tree, hdr->drep, hf_dcerpc_cn_rts_command_fack_bytesreceived, NULL);
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, cn_rts_command_tree, hdr->drep, hf_dcerpc_cn_rts_command_fack_availablewindow, NULL);
|
|
offset = dissect_dcerpc_uuid_t(tvb, offset, pinfo, cn_rts_command_tree, hdr->drep, hf_dcerpc_cn_rts_command_fack_channelcookie, NULL);
|
|
break;
|
|
case RTS_CMD_CONNECTIONTIMEOUT:
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, cn_rts_command_tree, hdr->drep, hf_dcerpc_cn_rts_command_connectiontimeout, NULL);
|
|
break;
|
|
case RTS_CMD_COOKIE:
|
|
offset = dissect_dcerpc_uuid_t(tvb, offset, pinfo, cn_rts_command_tree, hdr->drep, hf_dcerpc_cn_rts_command_cookie, NULL);
|
|
break;
|
|
case RTS_CMD_CHANNELLIFETIME:
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, cn_rts_command_tree, hdr->drep, hf_dcerpc_cn_rts_command_channellifetime, NULL);
|
|
break;
|
|
case RTS_CMD_CLIENTKEEPALIVE:
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, cn_rts_command_tree, hdr->drep, hf_dcerpc_cn_rts_command_clientkeepalive, NULL);
|
|
break;
|
|
case RTS_CMD_VERSION:
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, cn_rts_command_tree, hdr->drep, hf_dcerpc_cn_rts_command_version, NULL);
|
|
break;
|
|
case RTS_CMD_EMPTY:
|
|
break;
|
|
case RTS_CMD_PADDING: {
|
|
guint8 *padding;
|
|
const guint32 conformance_count = dcerpc_tvb_get_ntohl(tvb, offset, hdr->drep);
|
|
proto_tree_add_uint(cn_rts_command_tree, hf_dcerpc_cn_rts_command_conformancecount, tvb, offset, 4, conformance_count);
|
|
offset += 4;
|
|
padding = (guint8 *)tvb_memdup(NULL, tvb, offset, conformance_count);
|
|
proto_tree_add_bytes(cn_rts_command_tree, hf_dcerpc_cn_rts_command_padding, tvb, offset, conformance_count, padding);
|
|
offset += conformance_count;
|
|
} break;
|
|
case RTS_CMD_NEGATIVEANCE:
|
|
break;
|
|
case RTS_CMD_ANCE:
|
|
break;
|
|
case RTS_CMD_CLIENTADDRESS: {
|
|
guint8 *padding;
|
|
const guint32 addrtype = dcerpc_tvb_get_ntohl(tvb, offset, hdr->drep);
|
|
proto_tree_add_uint(cn_rts_command_tree, hf_dcerpc_cn_rts_command_addrtype, tvb, offset, 4, addrtype);
|
|
offset += 4;
|
|
switch (addrtype) {
|
|
case RTS_IPV4: {
|
|
const guint32 addr4 = tvb_get_ipv4(tvb, offset);
|
|
proto_tree_add_text(cn_rts_command_tree, tvb, offset, 4, "%s", get_hostname(addr4));
|
|
offset += 4;
|
|
} break;
|
|
case RTS_IPV6: {
|
|
struct e_in6_addr addr6;
|
|
tvb_get_ipv6(tvb, offset, &addr6);
|
|
proto_tree_add_text(cn_rts_command_tree, tvb, offset, 16, "%s", get_hostname6(&addr6));
|
|
offset += 16;
|
|
} break;
|
|
}
|
|
padding = (guint8 *)tvb_memdup(NULL, tvb, offset, 12);
|
|
proto_tree_add_bytes(cn_rts_command_tree, hf_dcerpc_cn_rts_command_padding, tvb, offset, 12, padding);
|
|
offset += 12;
|
|
} break;
|
|
case RTS_CMD_ASSOCIATIONGROUPID:
|
|
offset = dissect_dcerpc_uuid_t(tvb, offset, pinfo, cn_rts_command_tree, hdr->drep, hf_dcerpc_cn_rts_command_associationgroupid, NULL);
|
|
break;
|
|
case RTS_CMD_DESTINATION:
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, cn_rts_command_tree, hdr->drep, hf_dcerpc_cn_rts_command_forwarddestination, NULL);
|
|
break;
|
|
case RTS_CMD_PINGTRAFFICSENTNOTIFY:
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, cn_rts_command_tree, hdr->drep, hf_dcerpc_cn_rts_command_pingtrafficsentnotify, NULL);
|
|
break;
|
|
default:
|
|
proto_tree_add_text(cn_rts_command_tree, tvb, offset, 0, "unknown RTS command number");
|
|
break;
|
|
}
|
|
}
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "RPCH");
|
|
|
|
/* Define which PDU Body we are dealing with */
|
|
info_str = "unknown RTS PDU";
|
|
|
|
switch (rts_flags) {
|
|
case RTS_FLAG_NONE:
|
|
switch (commands_nb) {
|
|
case 1:
|
|
if (cmd[0] == 0x2) {
|
|
info_str = "CONN/A3";
|
|
} else if (cmd[0] == 0x3) {
|
|
info_str = "IN_R1/A5,IN_R1/A6,IN_R2/A2,IN_R2/A5,OUT_R2/A4";
|
|
} else if (cmd[0] == 0x7) {
|
|
info_str = "IN_R1/B1";
|
|
} else if (cmd[0] == 0x0) {
|
|
info_str = "IN_R1/B2";
|
|
} else if (cmd[0] == 0xD) {
|
|
info_str = "IN_R2/A3,IN_R2/A4";
|
|
} else if (cmd[0] == 0xA) {
|
|
info_str = "OUT_R1/A9,OUT_R1/A10,OUT_R1/A11,OUT_R2/B1,OUT_R2/B2";
|
|
}
|
|
break;
|
|
case 2:
|
|
if ((cmd[0] == 0x0) && (cmd[1] == 0x6)) {
|
|
info_str = "CONN/B3";
|
|
} else if ((cmd[0] == 0xD) && (cmd[1] == 0xA)) {
|
|
info_str = "OUT_R2/A5,OUT_R2/A6";
|
|
}
|
|
break;
|
|
case 3:
|
|
if ((cmd[0] == 0x6) && (cmd[1] == 0x0) && (cmd[2] == 0x2)) {
|
|
info_str = "CONN/C1,CONN/C2";
|
|
}
|
|
break;
|
|
case 4:
|
|
if ((cmd[0] == 0x6) && (cmd[1] == 0x3) && (cmd[2] == 0x3) && (cmd[3] == 0x0)) {
|
|
info_str = "CONN/A1";
|
|
} else if ((cmd[0] == 0xD) && (cmd[1] == 0x6) && (cmd[2] == 0x0) && (cmd[3] == 0x2)) {
|
|
info_str = "IN_R1/A3,IN_R1/A4";
|
|
}
|
|
break;
|
|
case 6:
|
|
if ((cmd[0] == 0x6) && (cmd[1] == 0x3) && (cmd[2] == 0x3) && (cmd[3] == 0x4) && (cmd[4] == 0x5) && (cmd[5] == 0xC)) {
|
|
info_str = "CONN/B1";
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case RTS_FLAG_PING:
|
|
switch (commands_nb) {
|
|
case 0:
|
|
info_str = "Ping";
|
|
break;
|
|
case 1:
|
|
if ((cmd[0] == 0x7) || (cmd[0] == 0x8)) {
|
|
info_str = "OUT_R2/C1";
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case RTS_FLAG_OTHER_CMD:
|
|
switch (commands_nb) {
|
|
case 1:
|
|
if (cmd[0] == 0x5) {
|
|
info_str = "Keep-Alive";
|
|
} else if (cmd[0] == 0xE) {
|
|
info_str = "PingTrafficSentNotify";
|
|
} else if (cmd[0] == 0x1) {
|
|
info_str = "FlowControlAck";
|
|
}
|
|
break;
|
|
case 2:
|
|
if ((cmd[0] == 0xD) && (cmd[1] == 0x1)) {
|
|
info_str = "FlowControlAckWithDestination";
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case RTS_FLAG_RECYCLE_CHANNEL:
|
|
switch (commands_nb) {
|
|
case 1:
|
|
if (cmd[0] == 0xD) {
|
|
info_str = "OUT_R1/A1,OUT_R1/A2,OUT_R2/A1,OUT_R2/A2";
|
|
}
|
|
break;
|
|
case 4:
|
|
if ((cmd[0] == 0x6) && (cmd[1] == 0x3) && (cmd[2] == 0x3) && (cmd[3] == 0x3)) {
|
|
info_str = "IN_R1/A1,IN_R2/A1";
|
|
}
|
|
break;
|
|
case 5:
|
|
if ((cmd[0] == 0x6) && (cmd[1] == 0x3) && (cmd[2] == 0x3) && (cmd[3] == 0x3) && (cmd[4] == 0x0)) {
|
|
info_str = "OUT_R1/A3,OUT_R2/A3";
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case RTS_FLAG_IN_CHANNEL|RTS_FLAG_RECYCLE_CHANNEL:
|
|
switch (commands_nb) {
|
|
case 6:
|
|
if ((cmd[0] == 0x6) && (cmd[1] == 0x3) && (cmd[2] == 0x3) && (cmd[3] == 0x3) && (cmd[4] == 0x0) && (cmd[5] == 0x2)) {
|
|
info_str = "IN_R1/A2";
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case RTS_FLAG_IN_CHANNEL:
|
|
switch (commands_nb) {
|
|
case 7:
|
|
if ((cmd[0] == 0x6) && (cmd[1] == 0x3) && (cmd[2] == 0x3) && (cmd[3] == 0x0) && (cmd[4] == 0x2) && (cmd[5] == 0xC) && (cmd[6] == 0xB)) {
|
|
info_str = "CONN/B2";
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case RTS_FLAG_OUT_CHANNEL|RTS_FLAG_RECYCLE_CHANNEL:
|
|
switch (commands_nb) {
|
|
case 7:
|
|
if ((cmd[0] == 0x6) && (cmd[1] == 0x3) && (cmd[2] == 0x3) && (cmd[3] == 0x3) && (cmd[4] == 0x4) && (cmd[5] == 0) && (cmd[6] == 0x2)) {
|
|
info_str = "OUT_R1/A4";
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case RTS_FLAG_OUT_CHANNEL:
|
|
switch (commands_nb) {
|
|
case 2:
|
|
if ((cmd[0] == 0xD) && (cmd[1] == 0x3)) {
|
|
info_str = "OUT_R1/A7,OUT_R1/A8,OUT_R2/A8";
|
|
}
|
|
break;
|
|
case 3:
|
|
if ((cmd[0] == 0xD) && (cmd[1] == 0x6) && (cmd[2] == 0x2)) {
|
|
info_str = "OUT_R1/A5,OUT_R1/A6";
|
|
} else if ((cmd[0] == 0xD) && (cmd[1] == 0x3) && (cmd[2] == 0x6)) {
|
|
info_str = "OUT_R2/A7";
|
|
}
|
|
break;
|
|
case 5:
|
|
if ((cmd[0] == 0x6) && (cmd[1] == 0x3) && (cmd[2] == 0x3) && (cmd[3] == 0x4) && (cmd[4] == 0x0)) {
|
|
info_str = "CONN/A2";
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case RTS_FLAG_EOF:
|
|
switch (commands_nb) {
|
|
case 1:
|
|
if (cmd[0] == 0xA) {
|
|
info_str = "OUT_R2/B3";
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case RTS_FLAG_ECHO:
|
|
switch (commands_nb) {
|
|
case 0:
|
|
info_str = "Echo";
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "%s, ", info_str);
|
|
col_set_fence(pinfo->cinfo,COL_INFO);
|
|
|
|
parent_pi = proto_tree_get_parent(dcerpc_tree);
|
|
if (parent_pi != NULL) {
|
|
proto_item_append_text(parent_pi, ", %s", info_str);
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
is_dcerpc(tvbuff_t *tvb, int offset, packet_info *pinfo _U_)
|
|
{
|
|
guint8 rpc_ver;
|
|
guint8 rpc_ver_minor;
|
|
guint8 ptype;
|
|
|
|
if (!tvb_bytes_exist(tvb, offset, sizeof(e_dce_cn_common_hdr_t)))
|
|
return FALSE; /* not enough information to check */
|
|
|
|
rpc_ver = tvb_get_guint8(tvb, offset++);
|
|
if (rpc_ver != 5)
|
|
return FALSE;
|
|
rpc_ver_minor = tvb_get_guint8(tvb, offset++);
|
|
if ((rpc_ver_minor != 0) && (rpc_ver_minor != 1))
|
|
return FALSE;
|
|
ptype = tvb_get_guint8(tvb, offset++);
|
|
if (ptype > PDU_RTS)
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* DCERPC dissector for connection oriented calls.
|
|
*/
|
|
static gboolean
|
|
dissect_dcerpc_cn(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *tree, gboolean can_desegment, int *pkt_len)
|
|
{
|
|
static const guint8 nulls[4] = { 0 };
|
|
int start_offset;
|
|
int padding = 0;
|
|
int subtvb_len = 0;
|
|
proto_item *ti = NULL;
|
|
proto_item *tf = NULL;
|
|
proto_tree *dcerpc_tree = NULL;
|
|
proto_tree *drep_tree = NULL;
|
|
e_dce_cn_common_hdr_t hdr;
|
|
dcerpc_auth_info auth_info;
|
|
tvbuff_t *fragment_tvb;
|
|
dcerpc_decode_as_data* decode_data = dcerpc_get_decode_data(pinfo);
|
|
static const int * hdr_flags[] = {
|
|
&hf_dcerpc_cn_flags_object,
|
|
&hf_dcerpc_cn_flags_maybe,
|
|
&hf_dcerpc_cn_flags_dne,
|
|
&hf_dcerpc_cn_flags_mpx,
|
|
&hf_dcerpc_cn_flags_reserved,
|
|
&hf_dcerpc_cn_flags_cancel_pending,
|
|
&hf_dcerpc_cn_flags_last_frag,
|
|
&hf_dcerpc_cn_flags_first_frag,
|
|
NULL
|
|
};
|
|
|
|
/*
|
|
* when done over nbt, dcerpc requests are padded with 4 bytes of null
|
|
* data for some reason.
|
|
*
|
|
* XXX - if that's always the case, the right way to do this would
|
|
* be to have a "dissect_dcerpc_cn_nb" routine which strips off
|
|
* the 4 bytes of null padding, and make that the dissector
|
|
* used for "netbios".
|
|
*/
|
|
if (tvb_memeql(tvb, offset, nulls, 4) == 0) {
|
|
|
|
/*
|
|
* Skip the padding.
|
|
*/
|
|
offset += 4;
|
|
padding += 4;
|
|
}
|
|
/*
|
|
* Check if this looks like a C/O DCERPC call
|
|
*/
|
|
if (!is_dcerpc(tvb, offset, pinfo))
|
|
return FALSE;
|
|
|
|
start_offset = offset;
|
|
hdr.rpc_ver = tvb_get_guint8(tvb, offset++);
|
|
hdr.rpc_ver_minor = tvb_get_guint8(tvb, offset++);
|
|
hdr.ptype = tvb_get_guint8(tvb, offset++);
|
|
|
|
hdr.flags = tvb_get_guint8(tvb, offset++);
|
|
tvb_memcpy(tvb, (guint8 *)hdr.drep, offset, sizeof (hdr.drep));
|
|
offset += (int)sizeof (hdr.drep);
|
|
|
|
hdr.frag_len = dcerpc_tvb_get_ntohs(tvb, offset, hdr.drep);
|
|
offset += 2;
|
|
hdr.auth_len = dcerpc_tvb_get_ntohs(tvb, offset, hdr.drep);
|
|
offset += 2;
|
|
hdr.call_id = dcerpc_tvb_get_ntohl(tvb, offset, hdr.drep);
|
|
/*offset += 4;*/
|
|
|
|
if (decode_data->dcectxid == 0) {
|
|
col_append_fstr(pinfo->cinfo, COL_DCE_CALL, "%u", hdr.call_id);
|
|
} else {
|
|
/* this is not the first DCE-RPC request/response in this (TCP?-)PDU,
|
|
* prepend a delimiter */
|
|
col_append_fstr(pinfo->cinfo, COL_DCE_CALL, "#%u", hdr.call_id);
|
|
}
|
|
|
|
if (can_desegment && pinfo->can_desegment
|
|
&& !tvb_bytes_exist(tvb, start_offset, hdr.frag_len)) {
|
|
pinfo->desegment_offset = start_offset;
|
|
pinfo->desegment_len = hdr.frag_len - tvb_reported_length_remaining(tvb, start_offset);
|
|
*pkt_len = 0; /* desegmentation required */
|
|
return TRUE;
|
|
}
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "DCERPC");
|
|
|
|
if (decode_data->dcectxid != 0) {
|
|
/* this is not the first DCE-RPC request/response in this (TCP?-)PDU,
|
|
* append a delimiter and set a column fence */
|
|
col_append_str(pinfo->cinfo, COL_INFO, " # ");
|
|
col_set_fence(pinfo->cinfo,COL_INFO);
|
|
}
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "%s: call_id: %u",
|
|
pckt_vals[hdr.ptype].strptr, hdr.call_id);
|
|
|
|
if (decode_data->dcectxid != 0) {
|
|
/* this is not the first DCE-RPC request/response in this (TCP?-)PDU */
|
|
expert_add_info(pinfo, NULL, &ei_dcerpc_fragment_multiple);
|
|
}
|
|
|
|
offset = start_offset;
|
|
tvb_ensure_bytes_exist(tvb, offset, 16);
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_dcerpc, tvb, offset, hdr.frag_len, ENC_NA);
|
|
dcerpc_tree = proto_item_add_subtree(ti, ett_dcerpc);
|
|
}
|
|
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_ver, tvb, offset, 1, hdr.rpc_ver);
|
|
offset++;
|
|
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_ver_minor, tvb, offset, 1, hdr.rpc_ver_minor);
|
|
offset++;
|
|
|
|
tf = proto_tree_add_uint(dcerpc_tree, hf_dcerpc_packet_type, tvb, offset, 1, hdr.ptype);
|
|
offset++;
|
|
|
|
#if 0 /* XXX - too much "output noise", removed for now */
|
|
if (hdr.ptype == PDU_BIND || hdr.ptype == PDU_ALTER ||
|
|
hdr.ptype == PDU_BIND_ACK || hdr.ptype == PDU_ALTER_ACK)
|
|
expert_add_info_format(pinfo, tf, &ei_dcerpc_context_change, "Context change: %s", val_to_str(hdr.ptype, pckt_vals, "(0x%x)"));
|
|
#endif
|
|
if (hdr.ptype == PDU_BIND_NAK)
|
|
expert_add_info(pinfo, tf, &ei_dcerpc_bind_not_acknowledged);
|
|
|
|
if (tree) {
|
|
proto_item_append_text(ti, " %s, Fragment: %s",
|
|
val_to_str(hdr.ptype, pckt_vals, "Unknown (0x%02x)"),
|
|
fragment_type(hdr.flags));
|
|
}
|
|
|
|
proto_tree_add_bitmask_value_with_flags(dcerpc_tree, tvb, offset, hf_dcerpc_cn_flags,
|
|
ett_dcerpc_cn_flags, hdr_flags, hdr.flags, BMT_NO_APPEND);
|
|
offset++;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", Fragment: %s", fragment_type(hdr.flags));
|
|
|
|
if (dcerpc_tree) {
|
|
tf = proto_tree_add_bytes(dcerpc_tree, hf_dcerpc_drep, tvb, offset, 4, hdr.drep);
|
|
drep_tree = proto_item_add_subtree(tf, ett_dcerpc_drep);
|
|
}
|
|
proto_tree_add_uint(drep_tree, hf_dcerpc_drep_byteorder, tvb, offset, 1, hdr.drep[0] >> 4);
|
|
proto_tree_add_uint(drep_tree, hf_dcerpc_drep_character, tvb, offset, 1, hdr.drep[0] & 0x0f);
|
|
proto_tree_add_uint(drep_tree, hf_dcerpc_drep_fp, tvb, offset+1, 1, hdr.drep[1]);
|
|
offset += (int)sizeof (hdr.drep);
|
|
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_cn_frag_len, tvb, offset, 2, hdr.frag_len);
|
|
offset += 2;
|
|
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_cn_auth_len, tvb, offset, 2, hdr.auth_len);
|
|
offset += 2;
|
|
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_cn_call_id, tvb, offset, 4, hdr.call_id);
|
|
offset += 4;
|
|
|
|
if (ti) {
|
|
proto_item_append_text(ti, ", FragLen: %u, Call: %u", hdr.frag_len, hdr.call_id);
|
|
}
|
|
|
|
/*
|
|
* None of the stuff done above should throw an exception, because
|
|
* we would have rejected this as "not DCE RPC" if we didn't have all
|
|
* of it. (XXX - perhaps we should request reassembly if we have
|
|
* enough of the header to consider it DCE RPC but not enough to
|
|
* get the fragment length; in that case the stuff still wouldn't
|
|
* throw an exception.)
|
|
*
|
|
* The rest of the stuff might, so return the PDU length to our caller.
|
|
* XXX - should we construct a tvbuff containing only the PDU and
|
|
* use that? Or should we have separate "is this a DCE RPC PDU",
|
|
* "how long is it", and "dissect it" routines - which might let us
|
|
* do most of the work in "tcp_dissect_pdus()"?
|
|
*/
|
|
if (pkt_len != NULL)
|
|
*pkt_len = hdr.frag_len + padding;
|
|
|
|
/* The remaining bytes in the current tvb might contain multiple
|
|
* DCE/RPC fragments, so create a new tvb subset for this fragment.
|
|
* Only limit the end of the fragment, but not the offset start,
|
|
* as the authentication function dissect_dcerpc_cn_auth() will fail
|
|
* (and other functions might fail as well) computing the right start
|
|
* offset otherwise.
|
|
*/
|
|
subtvb_len = MIN(hdr.frag_len, tvb_reported_length(tvb));
|
|
fragment_tvb = tvb_new_subset(tvb, start_offset,
|
|
subtvb_len /* length */,
|
|
hdr.frag_len /* reported_length */);
|
|
|
|
/*
|
|
* Packet type specific stuff is next.
|
|
*/
|
|
switch (hdr.ptype) {
|
|
case PDU_BIND:
|
|
case PDU_ALTER:
|
|
dissect_dcerpc_cn_bind(fragment_tvb, MIN(offset - start_offset, subtvb_len), pinfo, dcerpc_tree, &hdr);
|
|
break;
|
|
|
|
case PDU_BIND_ACK:
|
|
case PDU_ALTER_ACK:
|
|
dissect_dcerpc_cn_bind_ack(fragment_tvb, MIN(offset - start_offset, subtvb_len), pinfo, dcerpc_tree, &hdr);
|
|
break;
|
|
|
|
case PDU_AUTH3:
|
|
/*
|
|
* Nothing after the common header other than credentials.
|
|
*/
|
|
dissect_dcerpc_cn_auth(fragment_tvb, MIN(offset - start_offset, subtvb_len), pinfo, dcerpc_tree, &hdr, TRUE,
|
|
&auth_info);
|
|
break;
|
|
|
|
case PDU_REQ:
|
|
dissect_dcerpc_cn_rqst(fragment_tvb, MIN(offset - start_offset, subtvb_len), pinfo, dcerpc_tree, tree, &hdr);
|
|
break;
|
|
|
|
case PDU_RESP:
|
|
dissect_dcerpc_cn_resp(fragment_tvb, MIN(offset - start_offset, subtvb_len), pinfo, dcerpc_tree, tree, &hdr);
|
|
break;
|
|
|
|
case PDU_FAULT:
|
|
dissect_dcerpc_cn_fault(fragment_tvb, MIN(offset - start_offset, subtvb_len), pinfo, dcerpc_tree, &hdr);
|
|
break;
|
|
|
|
case PDU_BIND_NAK:
|
|
dissect_dcerpc_cn_bind_nak(fragment_tvb, MIN(offset - start_offset, subtvb_len), pinfo, dcerpc_tree, &hdr);
|
|
break;
|
|
|
|
case PDU_CO_CANCEL:
|
|
case PDU_ORPHANED:
|
|
/*
|
|
* Nothing after the common header other than an authentication
|
|
* verifier.
|
|
*/
|
|
dissect_dcerpc_cn_auth(fragment_tvb, MIN(offset - start_offset, subtvb_len), pinfo, dcerpc_tree, &hdr, FALSE,
|
|
&auth_info);
|
|
break;
|
|
|
|
case PDU_SHUTDOWN:
|
|
/*
|
|
* Nothing after the common header, not even an authentication
|
|
* verifier.
|
|
*/
|
|
break;
|
|
case PDU_RTS:
|
|
dissect_dcerpc_cn_rts(fragment_tvb, MIN(offset - start_offset, subtvb_len), pinfo, dcerpc_tree, &hdr);
|
|
break;
|
|
|
|
default:
|
|
/* might as well dissect the auth info */
|
|
dissect_dcerpc_cn_auth(fragment_tvb, MIN(offset - start_offset, subtvb_len), pinfo, dcerpc_tree, &hdr, FALSE,
|
|
&auth_info);
|
|
break;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* DCERPC dissector for connection oriented calls over packet-oriented
|
|
* transports
|
|
*/
|
|
static gboolean
|
|
dissect_dcerpc_cn_pk(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
dcerpc_decode_as_data* decode_data = dcerpc_get_decode_data(pinfo);
|
|
|
|
/*
|
|
* Only one PDU per transport packet, and only one transport
|
|
* packet per PDU.
|
|
*/
|
|
decode_data->dcetransporttype = DCE_TRANSPORT_UNKNOWN;
|
|
if (!dissect_dcerpc_cn(tvb, 0, pinfo, tree, FALSE, NULL)) {
|
|
/*
|
|
* It wasn't a DCERPC PDU.
|
|
*/
|
|
return FALSE;
|
|
} else {
|
|
/*
|
|
* It was.
|
|
*/
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* DCERPC dissector for connection oriented calls over byte-stream
|
|
* transports.
|
|
* we need to distinguish here between SMB and non-TCP (more in the future?)
|
|
* to be able to know what kind of private_data structure to expect.
|
|
*/
|
|
static gboolean
|
|
dissect_dcerpc_cn_bs_body(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
volatile int offset = 0;
|
|
int pdu_len = 0;
|
|
volatile int dcerpc_pdus = 0;
|
|
volatile gboolean ret = FALSE;
|
|
|
|
/*
|
|
* There may be multiple PDUs per transport packet; keep
|
|
* processing them.
|
|
*/
|
|
while (tvb_reported_length_remaining(tvb, offset) != 0) {
|
|
TRY {
|
|
pdu_len = 0;
|
|
if (dissect_dcerpc_cn(tvb, offset, pinfo, tree,
|
|
dcerpc_cn_desegment, &pdu_len)) {
|
|
dcerpc_pdus++;
|
|
}
|
|
} CATCH_NONFATAL_ERRORS {
|
|
/*
|
|
* Somebody threw an exception that means that there
|
|
* was a problem dissecting the payload; that means
|
|
* that a dissector was found, so we don't need to
|
|
* dissect the payload as data or update the protocol
|
|
* or info columns.
|
|
*
|
|
* Just show the exception and then continue dissecting
|
|
* PDUs.
|
|
*/
|
|
show_exception(tvb, pinfo, tree, EXCEPT_CODE, GET_MESSAGE);
|
|
/*
|
|
* Presumably it looked enough like a DCE RPC PDU that we
|
|
* dissected enough of it to throw an exception.
|
|
*/
|
|
dcerpc_pdus++;
|
|
} ENDTRY;
|
|
|
|
if (dcerpc_pdus == 0) {
|
|
gboolean try_desegment = FALSE;
|
|
if (dcerpc_cn_desegment && pinfo->can_desegment &&
|
|
!tvb_bytes_exist(tvb, offset, sizeof(e_dce_cn_common_hdr_t))) {
|
|
/* look for a previous occurrence of the DCE-RPC protocol */
|
|
wmem_list_frame_t *cur;
|
|
cur = wmem_list_frame_prev(wmem_list_tail(pinfo->layers));
|
|
while (cur != NULL) {
|
|
if (proto_dcerpc == (gint)GPOINTER_TO_UINT(wmem_list_frame_data(cur))) {
|
|
try_desegment = TRUE;
|
|
break;
|
|
}
|
|
cur = wmem_list_frame_prev(cur);
|
|
}
|
|
}
|
|
|
|
if (try_desegment) {
|
|
/* It didn't look like DCE-RPC but we already had one DCE-RPC
|
|
* layer in this packet and what we have is short. Assume that
|
|
* it was just too short to tell and ask the TCP layer for more
|
|
* data. */
|
|
pinfo->desegment_offset = offset;
|
|
pinfo->desegment_len = (guint32)(sizeof(e_dce_cn_common_hdr_t) - tvb_reported_length_remaining(tvb, offset));
|
|
} else {
|
|
/* Really not DCE-RPC */
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Well, we've seen at least one DCERPC PDU.
|
|
*/
|
|
ret = TRUE;
|
|
|
|
/* if we had more than one Req/Resp in this PDU change the protocol column */
|
|
/* this will formerly contain the last interface name, which may not be the same for all Req/Resp */
|
|
if (dcerpc_pdus >= 2)
|
|
col_add_fstr(pinfo->cinfo, COL_PROTOCOL, "%u*DCERPC", dcerpc_pdus);
|
|
|
|
if (pdu_len == 0) {
|
|
/*
|
|
* Desegmentation required - bail now, but give the user a hint that desegmentation might be done later.
|
|
*/
|
|
proto_tree_add_uint_format(tree, hf_dcerpc_cn_deseg_req, tvb, offset,
|
|
0,
|
|
tvb_reported_length_remaining(tvb, offset),
|
|
"[DCE RPC: %u byte%s left, desegmentation might follow]",
|
|
tvb_reported_length_remaining(tvb, offset),
|
|
plurality(tvb_reported_length_remaining(tvb, offset), "", "s"));
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Step to the next PDU.
|
|
*/
|
|
offset += pdu_len;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
dissect_dcerpc_cn_bs(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
dcerpc_decode_as_data* decode_data = dcerpc_get_decode_data(pinfo);
|
|
|
|
decode_data->dcetransporttype = DCE_TRANSPORT_UNKNOWN;
|
|
return dissect_dcerpc_cn_bs_body(tvb, pinfo, tree);
|
|
}
|
|
|
|
static guint
|
|
get_dcerpc_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb,
|
|
int offset _U_, void *data _U_)
|
|
{
|
|
guint8 drep[4];
|
|
guint16 frag_len;
|
|
|
|
/* XXX: why does htis not take offset into account? */
|
|
tvb_memcpy(tvb, (guint8 *)drep, 4, sizeof(drep));
|
|
frag_len = dcerpc_tvb_get_ntohs(tvb, 8, drep);
|
|
|
|
return frag_len;
|
|
}
|
|
|
|
static int
|
|
dissect_dcerpc_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
int pdu_len = 0;
|
|
dissect_dcerpc_cn(tvb, 0, pinfo, tree,
|
|
/* Desegment is already handled by TCP, don't confuse it */
|
|
FALSE,
|
|
&pdu_len);
|
|
return pdu_len;
|
|
}
|
|
|
|
static gboolean
|
|
dissect_dcerpc_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
|
|
{
|
|
dcerpc_decode_as_data* decode_data;
|
|
|
|
if (!is_dcerpc(tvb, 0, pinfo))
|
|
return 0;
|
|
|
|
decode_data = dcerpc_get_decode_data(pinfo);
|
|
decode_data->dcetransporttype = DCE_TRANSPORT_UNKNOWN;
|
|
|
|
tcp_dissect_pdus(tvb, pinfo, tree, dcerpc_cn_desegment, 10, get_dcerpc_pdu_len, dissect_dcerpc_pdu, data);
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
dissect_dcerpc_cn_smbpipe(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
dcerpc_decode_as_data* decode_data = dcerpc_get_decode_data(pinfo);
|
|
|
|
decode_data->dcetransporttype = DCE_CN_TRANSPORT_SMBPIPE;
|
|
return dissect_dcerpc_cn_bs_body(tvb, pinfo, tree);
|
|
}
|
|
|
|
static gboolean
|
|
dissect_dcerpc_cn_smb2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
dcerpc_decode_as_data* decode_data = dcerpc_get_decode_data(pinfo);
|
|
|
|
decode_data->dcetransporttype = DCE_CN_TRANSPORT_SMBPIPE;
|
|
return dissect_dcerpc_cn_bs_body(tvb, pinfo, tree);
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
dissect_dcerpc_dg_auth(tvbuff_t *tvb, int offset, proto_tree *dcerpc_tree,
|
|
e_dce_dg_common_hdr_t *hdr, int *auth_level_p)
|
|
{
|
|
proto_tree *auth_tree = NULL;
|
|
guint8 protection_level;
|
|
|
|
/*
|
|
* Initially set "*auth_level_p" to -1 to indicate that we haven't
|
|
* yet seen any authentication level information.
|
|
*/
|
|
if (auth_level_p != NULL)
|
|
*auth_level_p = -1;
|
|
|
|
/*
|
|
* The authentication information is at the *end* of the PDU; in
|
|
* request and response PDUs, the request and response stub data
|
|
* come before it.
|
|
*
|
|
* If the full packet is here, and there's data past the end of the
|
|
* packet body, then dissect the auth info.
|
|
*/
|
|
offset += hdr->frag_len;
|
|
if (tvb_reported_length_remaining(tvb, offset) > 0) {
|
|
switch (hdr->auth_proto) {
|
|
|
|
case DCE_C_RPC_AUTHN_PROTOCOL_KRB5:
|
|
auth_tree = proto_tree_add_subtree(dcerpc_tree, tvb, offset, -1, ett_dcerpc_krb5_auth_verf, NULL, "Kerberos authentication verifier");
|
|
protection_level = tvb_get_guint8(tvb, offset);
|
|
if (auth_level_p != NULL)
|
|
*auth_level_p = protection_level;
|
|
proto_tree_add_uint(auth_tree, hf_dcerpc_krb5_av_prot_level, tvb, offset, 1, protection_level);
|
|
offset++;
|
|
proto_tree_add_item(auth_tree, hf_dcerpc_krb5_av_key_vers_num, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
if (protection_level == DCE_C_AUTHN_LEVEL_PKT_PRIVACY)
|
|
offset += 6; /* 6 bytes of padding */
|
|
else
|
|
offset += 2; /* 2 bytes of padding */
|
|
proto_tree_add_item(auth_tree, hf_dcerpc_krb5_av_key_auth_verifier, tvb, offset, 16, ENC_NA);
|
|
/*offset += 16;*/
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(dcerpc_tree, tvb, offset, -1, "Authentication verifier");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_dg_cancel_ack(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree,
|
|
e_dce_dg_common_hdr_t *hdr)
|
|
{
|
|
guint32 version;
|
|
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_dg_cancel_vers,
|
|
&version);
|
|
|
|
switch (version) {
|
|
|
|
case 0:
|
|
/* The only version we know about */
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_dg_cancel_id,
|
|
NULL);
|
|
/*offset = */dissect_dcerpc_uint8(tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_dg_server_accepting_cancels,
|
|
NULL);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_dg_cancel(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree,
|
|
e_dce_dg_common_hdr_t *hdr)
|
|
{
|
|
guint32 version;
|
|
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_dg_cancel_vers,
|
|
&version);
|
|
|
|
switch (version) {
|
|
|
|
case 0:
|
|
/* The only version we know about */
|
|
/*offset = */dissect_dcerpc_uint32(tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_dg_cancel_id,
|
|
NULL);
|
|
/* XXX - are NDR Booleans 32 bits? */
|
|
|
|
/* XXX - the RPC reference in chapter: "the cancel PDU" doesn't mention
|
|
the accepting_cancels field (it's only in the cancel_ack PDU)! */
|
|
/*offset = dissect_dcerpc_uint32 (tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_dg_server_accepting_cancels,
|
|
NULL);*/
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_dg_fack(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree,
|
|
e_dce_dg_common_hdr_t *hdr)
|
|
{
|
|
guint8 version;
|
|
guint16 serial_num;
|
|
guint16 selack_len;
|
|
guint i;
|
|
|
|
offset = dissect_dcerpc_uint8(tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_dg_fack_vers,
|
|
&version);
|
|
/* padding */
|
|
offset++;
|
|
|
|
switch (version) {
|
|
|
|
case 0: /* The only version documented in the DCE RPC 1.1 spec */
|
|
case 1: /* This appears to be the same */
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_dg_fack_window_size,
|
|
NULL);
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_dg_fack_max_tsdu,
|
|
NULL);
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_dg_fack_max_frag_size,
|
|
NULL);
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_dg_fack_serial_num,
|
|
&serial_num);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " serial: %u",
|
|
serial_num);
|
|
offset = dissect_dcerpc_uint16(tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_dg_fack_selack_len,
|
|
&selack_len);
|
|
for (i = 0; i < selack_len; i++) {
|
|
offset = dissect_dcerpc_uint32(tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_dg_fack_selack,
|
|
NULL);
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_dg_reject_fault(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree,
|
|
e_dce_dg_common_hdr_t *hdr)
|
|
{
|
|
guint32 status;
|
|
|
|
/*offset = */dissect_dcerpc_uint32(tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_dg_status,
|
|
&status);
|
|
|
|
col_append_fstr (pinfo->cinfo, COL_INFO,
|
|
": status: %s",
|
|
val_to_str(status, reject_status_vals, "Unknown (0x%08x)"));
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_dg_stub(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree, proto_tree *tree,
|
|
e_dce_dg_common_hdr_t *hdr, dcerpc_info *di)
|
|
{
|
|
int length, reported_length, stub_length;
|
|
gboolean save_fragmented;
|
|
fragment_head *fd_head;
|
|
tvbuff_t *next_tvb;
|
|
proto_item *pi;
|
|
proto_item *parent_pi;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " opnum: %u len: %u",
|
|
di->call_data->opnum, hdr->frag_len );
|
|
|
|
length = tvb_reported_length_remaining(tvb, offset);
|
|
reported_length = tvb_reported_length_remaining(tvb, offset);
|
|
stub_length = hdr->frag_len;
|
|
if (length > stub_length)
|
|
length = stub_length;
|
|
if (reported_length > stub_length)
|
|
reported_length = stub_length;
|
|
|
|
save_fragmented = pinfo->fragmented;
|
|
|
|
/* If we don't have reassembly enabled, or this packet contains
|
|
the entire PDU, or if this is a short frame (or a frame
|
|
not reassembled at a lower layer) that doesn't include all
|
|
the data in the fragment, just call the handoff directly if
|
|
this is the first fragment or the PDU isn't fragmented. */
|
|
if ( (!dcerpc_reassemble) || !(hdr->flags1 & PFCL1_FRAG) ||
|
|
!tvb_bytes_exist(tvb, offset, stub_length) ) {
|
|
if (hdr->frag_num == 0) {
|
|
|
|
|
|
/* First fragment, possibly the only fragment */
|
|
|
|
/*
|
|
* XXX - authentication info?
|
|
*/
|
|
pinfo->fragmented = (hdr->flags1 & PFCL1_FRAG);
|
|
next_tvb = tvb_new_subset(tvb, offset, length,
|
|
reported_length);
|
|
dcerpc_try_handoff(pinfo, tree, dcerpc_tree, next_tvb,
|
|
next_tvb, hdr->drep, di, NULL);
|
|
} else {
|
|
/* PDU is fragmented and this isn't the first fragment */
|
|
if (dcerpc_tree) {
|
|
if (length > 0) {
|
|
proto_tree_add_text(dcerpc_tree, tvb, offset, stub_length,
|
|
"Fragment data (%d byte%s)",
|
|
stub_length,
|
|
plurality(stub_length, "", "s"));
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
/* Reassembly is enabled, the PDU is fragmented, and
|
|
we have all the data in the fragment; the first two
|
|
of those mean we should attempt reassembly, and the
|
|
third means we can attempt reassembly. */
|
|
if (dcerpc_tree) {
|
|
if (length > 0) {
|
|
proto_tree_add_text(dcerpc_tree, tvb, offset, stub_length,
|
|
"Fragment data (%d byte%s)", stub_length,
|
|
plurality(stub_length, "", "s"));
|
|
}
|
|
}
|
|
|
|
fd_head = fragment_add_seq(&dcerpc_cl_reassembly_table,
|
|
tvb, offset,
|
|
pinfo, hdr->seqnum, (void *)hdr,
|
|
hdr->frag_num, stub_length,
|
|
!(hdr->flags1 & PFCL1_LASTFRAG), 0);
|
|
if (fd_head != NULL) {
|
|
/* We completed reassembly... */
|
|
if (pinfo->fd->num == fd_head->reassembled_in) {
|
|
/* ...and this is the reassembled RPC PDU */
|
|
next_tvb = tvb_new_chain(tvb, fd_head->tvb_data);
|
|
add_new_data_source(pinfo, next_tvb, "Reassembled DCE/RPC");
|
|
show_fragment_seq_tree(fd_head, &dcerpc_frag_items,
|
|
tree, pinfo, next_tvb, &pi);
|
|
|
|
/*
|
|
* XXX - authentication info?
|
|
*/
|
|
pinfo->fragmented = FALSE;
|
|
dcerpc_try_handoff(pinfo, tree, dcerpc_tree, next_tvb,
|
|
next_tvb, hdr->drep, di, NULL);
|
|
} else {
|
|
/* ...and this isn't the reassembled RPC PDU */
|
|
pi = proto_tree_add_uint(dcerpc_tree, hf_dcerpc_reassembled_in,
|
|
tvb, 0, 0, fd_head->reassembled_in);
|
|
PROTO_ITEM_SET_GENERATED(pi);
|
|
parent_pi = proto_tree_get_parent(dcerpc_tree);
|
|
if (parent_pi != NULL) {
|
|
proto_item_append_text(parent_pi, ", [Reas: #%u]", fd_head->reassembled_in);
|
|
}
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
" [DCE/RPC fragment, reas: #%u]", fd_head->reassembled_in);
|
|
}
|
|
}
|
|
}
|
|
pinfo->fragmented = save_fragmented;
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_dg_rqst(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree, proto_tree *tree,
|
|
e_dce_dg_common_hdr_t *hdr, conversation_t *conv)
|
|
{
|
|
dcerpc_info *di;
|
|
dcerpc_call_value *value;
|
|
dcerpc_matched_key matched_key, *new_matched_key;
|
|
proto_item *pi;
|
|
proto_item *parent_pi;
|
|
|
|
if (!(pinfo->fd->flags.visited)) {
|
|
dcerpc_call_value *call_value;
|
|
dcerpc_dg_call_key *call_key;
|
|
|
|
call_key = (dcerpc_dg_call_key *)wmem_alloc(wmem_file_scope(), sizeof (dcerpc_dg_call_key));
|
|
call_key->conv = conv;
|
|
call_key->seqnum = hdr->seqnum;
|
|
call_key->act_id = hdr->act_id;
|
|
|
|
call_value = (dcerpc_call_value *)wmem_alloc(wmem_file_scope(), sizeof (dcerpc_call_value));
|
|
call_value->uuid = hdr->if_id;
|
|
call_value->ver = hdr->if_ver;
|
|
call_value->object_uuid = hdr->obj_id;
|
|
call_value->opnum = hdr->opnum;
|
|
call_value->req_frame = pinfo->fd->num;
|
|
call_value->req_time = pinfo->fd->abs_ts;
|
|
call_value->rep_frame = 0;
|
|
call_value->max_ptr = 0;
|
|
call_value->se_data = NULL;
|
|
call_value->private_data = NULL;
|
|
call_value->pol = NULL;
|
|
/* NDR64 is not available on dg transports ?*/
|
|
call_value->flags = 0;
|
|
|
|
g_hash_table_insert(dcerpc_dg_calls, call_key, call_value);
|
|
|
|
new_matched_key = (dcerpc_matched_key *)wmem_alloc(wmem_file_scope(), sizeof(dcerpc_matched_key));
|
|
new_matched_key->frame = pinfo->fd->num;
|
|
new_matched_key->call_id = hdr->seqnum;
|
|
g_hash_table_insert(dcerpc_matched, new_matched_key, call_value);
|
|
}
|
|
|
|
matched_key.frame = pinfo->fd->num;
|
|
matched_key.call_id = hdr->seqnum;
|
|
value = (dcerpc_call_value *)g_hash_table_lookup(dcerpc_matched, &matched_key);
|
|
if (!value) {
|
|
value = wmem_new(wmem_packet_scope(), dcerpc_call_value);
|
|
value->uuid = hdr->if_id;
|
|
value->ver = hdr->if_ver;
|
|
value->object_uuid = hdr->obj_id;
|
|
value->opnum = hdr->opnum;
|
|
value->req_frame = pinfo->fd->num;
|
|
value->rep_frame = 0;
|
|
value->max_ptr = 0;
|
|
value->se_data = NULL;
|
|
value->private_data = NULL;
|
|
}
|
|
|
|
di = wmem_new0(wmem_packet_scope(), dcerpc_info);
|
|
di->dcerpc_procedure_name = "";
|
|
di->conv = conv;
|
|
di->call_id = hdr->seqnum;
|
|
di->transport_salt = -1;
|
|
di->ptype = PDU_REQ;
|
|
di->call_data = value;
|
|
|
|
if (value->rep_frame != 0) {
|
|
pi = proto_tree_add_uint(dcerpc_tree, hf_dcerpc_response_in,
|
|
tvb, 0, 0, value->rep_frame);
|
|
PROTO_ITEM_SET_GENERATED(pi);
|
|
parent_pi = proto_tree_get_parent(dcerpc_tree);
|
|
if (parent_pi != NULL) {
|
|
proto_item_append_text(parent_pi, ", [Resp: #%u]", value->rep_frame);
|
|
}
|
|
}
|
|
dissect_dcerpc_dg_stub(tvb, offset, pinfo, dcerpc_tree, tree, hdr, di);
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_dg_resp(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree, proto_tree *tree,
|
|
e_dce_dg_common_hdr_t *hdr, conversation_t *conv)
|
|
{
|
|
dcerpc_info *di;
|
|
dcerpc_call_value *value;
|
|
dcerpc_matched_key matched_key, *new_matched_key;
|
|
proto_item *pi;
|
|
proto_item *parent_pi;
|
|
|
|
if (!(pinfo->fd->flags.visited)) {
|
|
dcerpc_call_value *call_value;
|
|
dcerpc_dg_call_key call_key;
|
|
|
|
call_key.conv = conv;
|
|
call_key.seqnum = hdr->seqnum;
|
|
call_key.act_id = hdr->act_id;
|
|
|
|
if ((call_value = (dcerpc_call_value *)g_hash_table_lookup(dcerpc_dg_calls, &call_key))) {
|
|
new_matched_key = (dcerpc_matched_key *)wmem_alloc(wmem_file_scope(), sizeof (dcerpc_matched_key));
|
|
new_matched_key->frame = pinfo->fd->num;
|
|
new_matched_key->call_id = hdr->seqnum;
|
|
g_hash_table_insert(dcerpc_matched, new_matched_key, call_value);
|
|
if (call_value->rep_frame == 0) {
|
|
call_value->rep_frame = pinfo->fd->num;
|
|
}
|
|
}
|
|
}
|
|
|
|
matched_key.frame = pinfo->fd->num;
|
|
matched_key.call_id = hdr->seqnum;
|
|
value = (dcerpc_call_value *)g_hash_table_lookup(dcerpc_matched, &matched_key);
|
|
if (!value) {
|
|
value = wmem_new0(wmem_packet_scope(), dcerpc_call_value);
|
|
value->uuid = hdr->if_id;
|
|
value->ver = hdr->if_ver;
|
|
value->object_uuid = hdr->obj_id;
|
|
value->opnum = hdr->opnum;
|
|
value->rep_frame = pinfo->fd->num;
|
|
}
|
|
|
|
di = wmem_new0(wmem_packet_scope(), dcerpc_info);
|
|
di->dcerpc_procedure_name = "";
|
|
di->conv = conv;
|
|
di->transport_salt = -1;
|
|
di->ptype = PDU_RESP;
|
|
di->call_data = value;
|
|
|
|
if (value->req_frame != 0) {
|
|
nstime_t delta_ts;
|
|
pi = proto_tree_add_uint(dcerpc_tree, hf_dcerpc_request_in,
|
|
tvb, 0, 0, value->req_frame);
|
|
PROTO_ITEM_SET_GENERATED(pi);
|
|
parent_pi = proto_tree_get_parent(dcerpc_tree);
|
|
if (parent_pi != NULL) {
|
|
proto_item_append_text(parent_pi, ", [Req: #%u]", value->req_frame);
|
|
}
|
|
nstime_delta(&delta_ts, &pinfo->fd->abs_ts, &value->req_time);
|
|
pi = proto_tree_add_time(dcerpc_tree, hf_dcerpc_time, tvb, offset, 0, &delta_ts);
|
|
PROTO_ITEM_SET_GENERATED(pi);
|
|
} else {
|
|
proto_tree_add_expert(dcerpc_tree, pinfo, &ei_dcerpc_no_request_found, tvb, 0, 0);
|
|
}
|
|
dissect_dcerpc_dg_stub(tvb, offset, pinfo, dcerpc_tree, tree, hdr, di);
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_dg_ping_ack(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *dcerpc_tree,
|
|
e_dce_dg_common_hdr_t *hdr, conversation_t *conv)
|
|
{
|
|
proto_item *parent_pi;
|
|
/* if (!(pinfo->fd->flags.visited)) {*/
|
|
dcerpc_call_value *call_value;
|
|
dcerpc_dg_call_key call_key;
|
|
|
|
call_key.conv = conv;
|
|
call_key.seqnum = hdr->seqnum;
|
|
call_key.act_id = hdr->act_id;
|
|
|
|
if ((call_value = (dcerpc_call_value *)g_hash_table_lookup(dcerpc_dg_calls, &call_key))) {
|
|
proto_item *pi;
|
|
nstime_t delta_ts;
|
|
|
|
pi = proto_tree_add_uint(dcerpc_tree, hf_dcerpc_request_in,
|
|
tvb, 0, 0, call_value->req_frame);
|
|
PROTO_ITEM_SET_GENERATED(pi);
|
|
parent_pi = proto_tree_get_parent(dcerpc_tree);
|
|
if (parent_pi != NULL) {
|
|
proto_item_append_text(parent_pi, ", [Req: #%u]", call_value->req_frame);
|
|
}
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " [req: #%u]", call_value->req_frame);
|
|
|
|
nstime_delta(&delta_ts, &pinfo->fd->abs_ts, &call_value->req_time);
|
|
pi = proto_tree_add_time(dcerpc_tree, hf_dcerpc_time, tvb, offset, 0, &delta_ts);
|
|
PROTO_ITEM_SET_GENERATED(pi);
|
|
/* }*/
|
|
}
|
|
}
|
|
|
|
/*
|
|
* DCERPC dissector for connectionless calls
|
|
*/
|
|
static gboolean
|
|
dissect_dcerpc_dg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
proto_item *ti = NULL;
|
|
proto_item *tf = NULL;
|
|
proto_tree *dcerpc_tree = NULL;
|
|
proto_tree *drep_tree = NULL;
|
|
e_dce_dg_common_hdr_t hdr;
|
|
int offset = 0;
|
|
conversation_t *conv;
|
|
int auth_level;
|
|
char *uuid_str;
|
|
const char *uuid_name = NULL;
|
|
static const int * hdr_flags1[] = {
|
|
&hf_dcerpc_dg_flags1_rsrvd_80,
|
|
&hf_dcerpc_dg_flags1_broadcast,
|
|
&hf_dcerpc_dg_flags1_idempotent,
|
|
&hf_dcerpc_dg_flags1_maybe,
|
|
&hf_dcerpc_dg_flags1_nofack,
|
|
&hf_dcerpc_dg_flags1_frag,
|
|
&hf_dcerpc_dg_flags1_last_frag,
|
|
&hf_dcerpc_dg_flags1_rsrvd_01,
|
|
NULL
|
|
};
|
|
|
|
static const int * hdr_flags2[] = {
|
|
&hf_dcerpc_dg_flags2_rsrvd_80,
|
|
&hf_dcerpc_dg_flags2_rsrvd_40,
|
|
&hf_dcerpc_dg_flags2_rsrvd_20,
|
|
&hf_dcerpc_dg_flags2_rsrvd_10,
|
|
&hf_dcerpc_dg_flags2_rsrvd_08,
|
|
&hf_dcerpc_dg_flags2_rsrvd_04,
|
|
&hf_dcerpc_dg_flags2_cancel_pending,
|
|
&hf_dcerpc_dg_flags2_rsrvd_01,
|
|
NULL
|
|
};
|
|
|
|
/*
|
|
* Check if this looks like a CL DCERPC call. All dg packets
|
|
* have an 80 byte header on them. Which starts with
|
|
* version (4), pkt_type.
|
|
*/
|
|
if (tvb_reported_length(tvb) < sizeof (hdr)) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* Version must be 4 */
|
|
hdr.rpc_ver = tvb_get_guint8(tvb, offset++);
|
|
if (hdr.rpc_ver != 4)
|
|
return FALSE;
|
|
|
|
/* Type must be <= 19 or it's not DCE/RPC */
|
|
hdr.ptype = tvb_get_guint8(tvb, offset++);
|
|
if (hdr.ptype > 19)
|
|
return FALSE;
|
|
|
|
/* flags1 has bit 1 and 8 as reserved so if any of them are set, it is
|
|
probably not a DCE/RPC packet
|
|
*/
|
|
hdr.flags1 = tvb_get_guint8(tvb, offset++);
|
|
if (hdr.flags1&0x81)
|
|
return FALSE;
|
|
|
|
/* flags2 has all bits except bit 2 as reserved so if any of them are set
|
|
it is probably not DCE/RPC.
|
|
*/
|
|
hdr.flags2 = tvb_get_guint8(tvb, offset++);
|
|
if (hdr.flags2&0xfd)
|
|
return FALSE;
|
|
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "DCERPC");
|
|
col_add_str(pinfo->cinfo, COL_INFO, pckt_vals[hdr.ptype].strptr);
|
|
|
|
tvb_memcpy(tvb, (guint8 *)hdr.drep, offset, sizeof (hdr.drep));
|
|
offset += (int)sizeof (hdr.drep);
|
|
hdr.serial_hi = tvb_get_guint8(tvb, offset++);
|
|
dcerpc_tvb_get_uuid(tvb, offset, hdr.drep, &hdr.obj_id);
|
|
offset += 16;
|
|
dcerpc_tvb_get_uuid(tvb, offset, hdr.drep, &hdr.if_id);
|
|
offset += 16;
|
|
dcerpc_tvb_get_uuid(tvb, offset, hdr.drep, &hdr.act_id);
|
|
offset += 16;
|
|
hdr.server_boot = dcerpc_tvb_get_ntohl(tvb, offset, hdr.drep);
|
|
offset += 4;
|
|
hdr.if_ver = dcerpc_tvb_get_ntohl(tvb, offset, hdr.drep);
|
|
offset += 4;
|
|
hdr.seqnum = dcerpc_tvb_get_ntohl(tvb, offset, hdr.drep);
|
|
offset += 4;
|
|
hdr.opnum = dcerpc_tvb_get_ntohs(tvb, offset, hdr.drep);
|
|
offset += 2;
|
|
hdr.ihint = dcerpc_tvb_get_ntohs(tvb, offset, hdr.drep);
|
|
offset += 2;
|
|
hdr.ahint = dcerpc_tvb_get_ntohs(tvb, offset, hdr.drep);
|
|
offset += 2;
|
|
hdr.frag_len = dcerpc_tvb_get_ntohs(tvb, offset, hdr.drep);
|
|
offset += 2;
|
|
hdr.frag_num = dcerpc_tvb_get_ntohs(tvb, offset, hdr.drep);
|
|
offset += 2;
|
|
hdr.auth_proto = tvb_get_guint8(tvb, offset++);
|
|
hdr.serial_lo = tvb_get_guint8(tvb, offset++);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_dcerpc, tvb, 0, -1, ENC_NA);
|
|
if (ti) {
|
|
dcerpc_tree = proto_item_add_subtree(ti, ett_dcerpc);
|
|
proto_item_append_text(ti, " %s, Seq: %u, Serial: %u, Frag: %u, FragLen: %u",
|
|
val_to_str(hdr.ptype, pckt_vals, "Unknown (0x%02x)"),
|
|
hdr.seqnum, hdr.serial_hi*256+hdr.serial_lo,
|
|
hdr.frag_num, hdr.frag_len);
|
|
}
|
|
}
|
|
offset = 0;
|
|
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_ver, tvb, offset, 1, hdr.rpc_ver);
|
|
offset++;
|
|
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_packet_type, tvb, offset, 1, hdr.ptype);
|
|
offset++;
|
|
|
|
proto_tree_add_bitmask_value(dcerpc_tree, tvb, offset, hf_dcerpc_dg_flags1,
|
|
ett_dcerpc_dg_flags1, hdr_flags1, hdr.flags1);
|
|
offset++;
|
|
|
|
proto_tree_add_bitmask_value(dcerpc_tree, tvb, offset, hf_dcerpc_dg_flags2,
|
|
ett_dcerpc_dg_flags2, hdr_flags2, hdr.flags2);
|
|
offset++;
|
|
|
|
if (tree) {
|
|
tf = proto_tree_add_bytes(dcerpc_tree, hf_dcerpc_drep, tvb, offset, sizeof (hdr.drep), hdr.drep);
|
|
drep_tree = proto_item_add_subtree(tf, ett_dcerpc_drep);
|
|
if (drep_tree) {
|
|
proto_tree_add_uint(drep_tree, hf_dcerpc_drep_byteorder, tvb, offset, 1, hdr.drep[0] >> 4);
|
|
proto_tree_add_uint(drep_tree, hf_dcerpc_drep_character, tvb, offset, 1, hdr.drep[0] & 0x0f);
|
|
proto_tree_add_uint(drep_tree, hf_dcerpc_drep_fp, tvb, offset+1, 1, hdr.drep[1]);
|
|
proto_item_append_text(tf, " (Order: %s, Char: %s, Float: %s)",
|
|
val_to_str_const(hdr.drep[0] >> 4, drep_byteorder_vals, "Unknown"),
|
|
val_to_str_const(hdr.drep[0] & 0x0f, drep_character_vals, "Unknown"),
|
|
val_to_str_const(hdr.drep[1], drep_fp_vals, "Unknown"));
|
|
}
|
|
}
|
|
offset += (int)sizeof (hdr.drep);
|
|
|
|
if (tree)
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_dg_serial_hi, tvb, offset, 1, hdr.serial_hi);
|
|
offset++;
|
|
|
|
if (tree) {
|
|
proto_tree_add_guid_format(dcerpc_tree, hf_dcerpc_obj_id, tvb,
|
|
offset, 16, (e_guid_t *) &hdr.obj_id, "Object UUID: %s",
|
|
guid_to_str(wmem_packet_scope(), (e_guid_t *) &hdr.obj_id));
|
|
}
|
|
offset += 16;
|
|
|
|
if (tree) {
|
|
uuid_str = guid_to_str(wmem_packet_scope(), (e_guid_t*)&hdr.if_id);
|
|
uuid_name = guids_get_uuid_name(&hdr.if_id);
|
|
if (uuid_name) {
|
|
proto_tree_add_guid_format(dcerpc_tree, hf_dcerpc_dg_if_id, tvb,
|
|
offset, 16, (e_guid_t *) &hdr.if_id, "Interface: %s UUID: %s", uuid_name, uuid_str);
|
|
} else {
|
|
proto_tree_add_guid_format(dcerpc_tree, hf_dcerpc_dg_if_id, tvb,
|
|
offset, 16, (e_guid_t *) &hdr.if_id, "Interface UUID: %s", uuid_str);
|
|
}
|
|
}
|
|
offset += 16;
|
|
|
|
if (tree) {
|
|
proto_tree_add_guid_format(dcerpc_tree, hf_dcerpc_dg_act_id, tvb,
|
|
offset, 16, (e_guid_t *) &hdr.act_id, "Activity: %s",
|
|
guid_to_str(wmem_packet_scope(), (e_guid_t *) &hdr.act_id));
|
|
}
|
|
offset += 16;
|
|
|
|
if (tree) {
|
|
nstime_t server_boot;
|
|
|
|
server_boot.secs = hdr.server_boot;
|
|
server_boot.nsecs = 0;
|
|
|
|
if (hdr.server_boot == 0)
|
|
proto_tree_add_time_format_value(dcerpc_tree, hf_dcerpc_dg_server_boot,
|
|
tvb, offset, 4, &server_boot,
|
|
"Unknown (0)");
|
|
else
|
|
proto_tree_add_time(dcerpc_tree, hf_dcerpc_dg_server_boot,
|
|
tvb, offset, 4, &server_boot);
|
|
}
|
|
offset += 4;
|
|
|
|
if (tree)
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_dg_if_ver, tvb, offset, 4, hdr.if_ver);
|
|
offset += 4;
|
|
|
|
if (tree)
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_dg_seqnum, tvb, offset, 4, hdr.seqnum);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ": seq: %u", hdr.seqnum);
|
|
col_append_fstr(pinfo->cinfo, COL_DCE_CALL, "%u", hdr.seqnum);
|
|
offset += 4;
|
|
|
|
if (tree)
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_opnum, tvb, offset, 2, hdr.opnum);
|
|
offset += 2;
|
|
|
|
if (tree)
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_dg_ihint, tvb, offset, 2, hdr.ihint);
|
|
offset += 2;
|
|
|
|
if (tree)
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_dg_ahint, tvb, offset, 2, hdr.ahint);
|
|
offset += 2;
|
|
|
|
if (tree)
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_dg_frag_len, tvb, offset, 2, hdr.frag_len);
|
|
offset += 2;
|
|
|
|
if (tree)
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_dg_frag_num, tvb, offset, 2, hdr.frag_num);
|
|
if (hdr.flags1 & PFCL1_FRAG) {
|
|
/* Fragmented - put the fragment number into the Info column */
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " frag: %u",
|
|
hdr.frag_num);
|
|
}
|
|
offset += 2;
|
|
|
|
if (tree)
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_dg_auth_proto, tvb, offset, 1, hdr.auth_proto);
|
|
offset++;
|
|
|
|
if (tree)
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_dg_serial_lo, tvb, offset, 1, hdr.serial_lo);
|
|
if (hdr.flags1 & PFCL1_FRAG) {
|
|
/* Fragmented - put the serial number into the Info column */
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " serial: %u",
|
|
(hdr.serial_hi << 8) | hdr.serial_lo);
|
|
}
|
|
offset++;
|
|
|
|
if (tree) {
|
|
/*
|
|
* XXX - for Kerberos, we get a protection level; if it's
|
|
* DCE_C_AUTHN_LEVEL_PKT_PRIVACY, we can't dissect the
|
|
* stub data.
|
|
*/
|
|
dissect_dcerpc_dg_auth(tvb, offset, dcerpc_tree, &hdr,
|
|
&auth_level);
|
|
}
|
|
|
|
/*
|
|
* keeping track of the conversation shouldn't really be necessary
|
|
* for connectionless packets, because everything we need to know
|
|
* to dissect is in the header for each packet. Unfortunately,
|
|
* Microsoft's implementation is buggy and often puts the
|
|
* completely wrong if_id in the header. go figure. So, keep
|
|
* track of the seqnum and use that if possible. Note: that's not
|
|
* completely correct. It should really be done based on both the
|
|
* activity_id and seqnum. I haven't seen anywhere that it would
|
|
* make a difference, but for future reference...
|
|
*/
|
|
conv = find_or_create_conversation(pinfo);
|
|
|
|
/*
|
|
* Packet type specific stuff is next.
|
|
*/
|
|
|
|
switch (hdr.ptype) {
|
|
|
|
case PDU_CANCEL_ACK:
|
|
/* Body is optional */
|
|
/* XXX - we assume "frag_len" is the length of the body */
|
|
if (hdr.frag_len != 0)
|
|
dissect_dcerpc_dg_cancel_ack(tvb, offset, pinfo, dcerpc_tree, &hdr);
|
|
break;
|
|
|
|
case PDU_CL_CANCEL:
|
|
/*
|
|
* XXX - The DCE RPC 1.1 spec doesn't say the body is optional,
|
|
* but in at least one capture none of the Cl_cancel PDUs had a
|
|
* body.
|
|
*/
|
|
/* XXX - we assume "frag_len" is the length of the body */
|
|
if (hdr.frag_len != 0)
|
|
dissect_dcerpc_dg_cancel(tvb, offset, pinfo, dcerpc_tree, &hdr);
|
|
break;
|
|
|
|
case PDU_NOCALL:
|
|
/* Body is optional; if present, it's the same as PDU_FACK */
|
|
/* XXX - we assume "frag_len" is the length of the body */
|
|
if (hdr.frag_len != 0)
|
|
dissect_dcerpc_dg_fack(tvb, offset, pinfo, dcerpc_tree, &hdr);
|
|
break;
|
|
|
|
case PDU_FACK:
|
|
/* Body is optional */
|
|
/* XXX - we assume "frag_len" is the length of the body */
|
|
if (hdr.frag_len != 0)
|
|
dissect_dcerpc_dg_fack(tvb, offset, pinfo, dcerpc_tree, &hdr);
|
|
break;
|
|
|
|
case PDU_REJECT:
|
|
case PDU_FAULT:
|
|
dissect_dcerpc_dg_reject_fault(tvb, offset, pinfo, dcerpc_tree, &hdr);
|
|
break;
|
|
|
|
case PDU_REQ:
|
|
dissect_dcerpc_dg_rqst(tvb, offset, pinfo, dcerpc_tree, tree, &hdr, conv);
|
|
break;
|
|
|
|
case PDU_RESP:
|
|
dissect_dcerpc_dg_resp(tvb, offset, pinfo, dcerpc_tree, tree, &hdr, conv);
|
|
break;
|
|
|
|
/* these requests have no body */
|
|
case PDU_ACK:
|
|
case PDU_PING:
|
|
dissect_dcerpc_dg_ping_ack(tvb, offset, pinfo, dcerpc_tree, &hdr, conv);
|
|
break;
|
|
case PDU_WORKING:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
dcerpc_init_protocol(void)
|
|
{
|
|
/* structures and data for BIND */
|
|
dcerpc_binds = g_hash_table_new(dcerpc_bind_hash, dcerpc_bind_equal);
|
|
|
|
/* structures and data for CALL */
|
|
dcerpc_cn_calls = g_hash_table_new(dcerpc_cn_call_hash, dcerpc_cn_call_equal);
|
|
dcerpc_dg_calls = g_hash_table_new(dcerpc_dg_call_hash, dcerpc_dg_call_equal);
|
|
|
|
/* structure and data for MATCHED */
|
|
dcerpc_matched = g_hash_table_new(dcerpc_matched_hash, dcerpc_matched_equal);
|
|
decode_dcerpc_inject_bindings();
|
|
}
|
|
|
|
static void
|
|
dcerpc_cleanup_protocol(void)
|
|
{
|
|
g_hash_table_destroy(dcerpc_binds);
|
|
g_hash_table_destroy(dcerpc_cn_calls);
|
|
g_hash_table_destroy(dcerpc_dg_calls);
|
|
g_hash_table_destroy(dcerpc_matched);
|
|
}
|
|
|
|
void
|
|
proto_register_dcerpc(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_dcerpc_request_in,
|
|
{ "Request in frame", "dcerpc.request_in", FT_FRAMENUM, BASE_NONE,
|
|
NULL, 0, "This packet is a response to the packet with this number", HFILL }},
|
|
{ &hf_dcerpc_response_in,
|
|
{ "Response in frame", "dcerpc.response_in", FT_FRAMENUM, BASE_NONE,
|
|
NULL, 0, "This packet will be responded in the packet with this number", HFILL }},
|
|
{ &hf_dcerpc_referent_id32,
|
|
{ "Referent ID", "dcerpc.referent_id", FT_UINT32, BASE_HEX,
|
|
NULL, 0, "Referent ID for this NDR encoded pointer", HFILL }},
|
|
{ &hf_dcerpc_referent_id64,
|
|
{ "Referent ID", "dcerpc.referent_id", FT_UINT64, BASE_HEX,
|
|
NULL, 0, "Referent ID for this NDR encoded pointer", HFILL }},
|
|
{ &hf_dcerpc_ver,
|
|
{ "Version", "dcerpc.ver", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_ver_minor,
|
|
{ "Version (minor)", "dcerpc.ver_minor", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_packet_type,
|
|
{ "Packet type", "dcerpc.pkt_type", FT_UINT8, BASE_DEC, VALS(pckt_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_flags,
|
|
{ "Packet Flags", "dcerpc.cn_flags", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_flags_first_frag,
|
|
{ "First Frag", "dcerpc.cn_flags.first_frag", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFC_FIRST_FRAG, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_flags_last_frag,
|
|
{ "Last Frag", "dcerpc.cn_flags.last_frag", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFC_LAST_FRAG, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_flags_cancel_pending,
|
|
{ "Cancel Pending", "dcerpc.cn_flags.cancel_pending", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFC_PENDING_CANCEL, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_flags_reserved,
|
|
{ "Reserved", "dcerpc.cn_flags.reserved", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFC_RESERVED_1, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_flags_mpx,
|
|
{ "Multiplex", "dcerpc.cn_flags.mpx", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFC_CONC_MPX, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_flags_dne,
|
|
{ "Did Not Execute", "dcerpc.cn_flags.dne", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFC_DID_NOT_EXECUTE, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_flags_maybe,
|
|
{ "Maybe", "dcerpc.cn_flags.maybe", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFC_MAYBE, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_flags_object,
|
|
{ "Object", "dcerpc.cn_flags.object", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFC_OBJECT_UUID, NULL, HFILL }},
|
|
{ &hf_dcerpc_drep,
|
|
{ "Data Representation", "dcerpc.drep", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_drep_byteorder,
|
|
{ "Byte order", "dcerpc.drep.byteorder", FT_UINT8, BASE_DEC, VALS(drep_byteorder_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_ndr_padding,
|
|
{ "NDR-Padding", "dcerpc.ndr_padding", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_drep_character,
|
|
{ "Character", "dcerpc.drep.character", FT_UINT8, BASE_DEC, VALS(drep_character_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_drep_fp,
|
|
{ "Floating-point", "dcerpc.drep.fp", FT_UINT8, BASE_DEC, VALS(drep_fp_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_frag_len,
|
|
{ "Frag Length", "dcerpc.cn_frag_len", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_auth_len,
|
|
{ "Auth Length", "dcerpc.cn_auth_len", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_call_id,
|
|
{ "Call ID", "dcerpc.cn_call_id", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_max_xmit,
|
|
{ "Max Xmit Frag", "dcerpc.cn_max_xmit", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_max_recv,
|
|
{ "Max Recv Frag", "dcerpc.cn_max_recv", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_assoc_group,
|
|
{ "Assoc Group", "dcerpc.cn_assoc_group", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_num_ctx_items,
|
|
{ "Num Ctx Items", "dcerpc.cn_num_ctx_items", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_ctx_item,
|
|
{ "Ctx Item", "dcerpc.cn_ctx_item", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_ctx_id,
|
|
{ "Context ID", "dcerpc.cn_ctx_id", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_num_trans_items,
|
|
{ "Num Trans Items", "dcerpc.cn_num_trans_items", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_bind_abstract_syntax,
|
|
{ "Abstract Syntax", "dcerpc.cn_bind_abstract_syntax", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_bind_if_id,
|
|
{ "Interface UUID", "dcerpc.cn_bind_to_uuid", FT_GUID, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_bind_if_ver,
|
|
{ "Interface Ver", "dcerpc.cn_bind_if_ver", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_bind_if_ver_minor,
|
|
{ "Interface Ver Minor", "dcerpc.cn_bind_if_ver_minor", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_bind_trans_syntax,
|
|
{ "Transfer Syntax", "dcerpc.cn_bind_trans", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_bind_trans_id,
|
|
{ "ID", "dcerpc.cn_bind_trans_id", FT_GUID, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_bind_trans_ver,
|
|
{ "ver", "dcerpc.cn_bind_trans_ver", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_bind_trans_btfn_01, /* [MS-RPCE] 2.2.2.14 */
|
|
{ "Security Context Multiplexing Supported", "dcerpc.cn_bind_trans_btfn.01", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x01, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_bind_trans_btfn_02,
|
|
{ "Keep Connection On Orphan Supported", "dcerpc.cn_bind_trans_btfn.02", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x02, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_alloc_hint,
|
|
{ "Alloc hint", "dcerpc.cn_alloc_hint", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_sec_addr_len,
|
|
{ "Scndry Addr len", "dcerpc.cn_sec_addr_len", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_sec_addr,
|
|
{ "Scndry Addr", "dcerpc.cn_sec_addr", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_num_results,
|
|
{ "Num results", "dcerpc.cn_num_results", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_ack_result,
|
|
{ "Ack result", "dcerpc.cn_ack_result", FT_UINT16, BASE_DEC, VALS(p_cont_result_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_ack_reason,
|
|
{ "Ack reason", "dcerpc.cn_ack_reason", FT_UINT16, BASE_DEC, VALS(p_provider_reason_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_ack_trans_id,
|
|
{ "Transfer Syntax", "dcerpc.cn_ack_trans_id", FT_GUID, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_ack_trans_ver,
|
|
{ "Syntax ver", "dcerpc.cn_ack_trans_ver", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_ack_btfn,
|
|
{ "Bind Time Feature Negotiation Bitmask", "dcerpc.cn_ack_btfn", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_reject_reason,
|
|
{ "Reject reason", "dcerpc.cn_reject_reason", FT_UINT16, BASE_DEC, VALS(reject_reason_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_num_protocols,
|
|
{ "Number of protocols", "dcerpc.cn_num_protocols", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_protocol_ver_major,
|
|
{ "Protocol major version", "dcerpc.cn_protocol_ver_major", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_protocol_ver_minor,
|
|
{ "Protocol minor version", "dcerpc.cn_protocol_ver_minor", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_cancel_count,
|
|
{ "Cancel count", "dcerpc.cn_cancel_count", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_status,
|
|
{ "Status", "dcerpc.cn_status", FT_UINT32, BASE_HEX, VALS(reject_status_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_deseg_req,
|
|
{ "Desegmentation Required", "dcerpc.cn_deseg_req", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_auth_type,
|
|
{ "Auth type", "dcerpc.auth_type", FT_UINT8, BASE_DEC, VALS(authn_protocol_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_auth_level,
|
|
{ "Auth level", "dcerpc.auth_level", FT_UINT8, BASE_DEC, VALS(authn_level_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_auth_pad_len,
|
|
{ "Auth pad len", "dcerpc.auth_pad_len", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_auth_rsrvd,
|
|
{ "Auth Rsrvd", "dcerpc.auth_rsrvd", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_auth_ctx_id,
|
|
{ "Auth Context ID", "dcerpc.auth_ctx_id", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags1,
|
|
{ "Flags1", "dcerpc.dg_flags1", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags1_rsrvd_01,
|
|
{ "Reserved", "dcerpc.dg_flags1_rsrvd_01", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFCL1_RESERVED_01, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags1_last_frag,
|
|
{ "Last Fragment", "dcerpc.dg_flags1_last_frag", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFCL1_LASTFRAG, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags1_frag,
|
|
{ "Fragment", "dcerpc.dg_flags1_frag", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFCL1_FRAG, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags1_nofack,
|
|
{ "No Fack", "dcerpc.dg_flags1_nofack", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFCL1_NOFACK, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags1_maybe,
|
|
{ "Maybe", "dcerpc.dg_flags1_maybe", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFCL1_MAYBE, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags1_idempotent,
|
|
{ "Idempotent", "dcerpc.dg_flags1_idempotent", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFCL1_IDEMPOTENT, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags1_broadcast,
|
|
{ "Broadcast", "dcerpc.dg_flags1_broadcast", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFCL1_BROADCAST, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags1_rsrvd_80,
|
|
{ "Reserved", "dcerpc.dg_flags1_rsrvd_80", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFCL1_RESERVED_80, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags2,
|
|
{ "Flags2", "dcerpc.dg_flags2", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags2_rsrvd_01,
|
|
{ "Reserved", "dcerpc.dg_flags2_rsrvd_01", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFCL2_RESERVED_01, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags2_cancel_pending,
|
|
{ "Cancel Pending", "dcerpc.dg_flags2_cancel_pending", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFCL2_CANCEL_PENDING, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags2_rsrvd_04,
|
|
{ "Reserved", "dcerpc.dg_flags2_rsrvd_04", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFCL2_RESERVED_04, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags2_rsrvd_08,
|
|
{ "Reserved", "dcerpc.dg_flags2_rsrvd_08", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFCL2_RESERVED_08, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags2_rsrvd_10,
|
|
{ "Reserved", "dcerpc.dg_flags2_rsrvd_10", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFCL2_RESERVED_10, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags2_rsrvd_20,
|
|
{ "Reserved", "dcerpc.dg_flags2_rsrvd_20", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFCL2_RESERVED_20, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags2_rsrvd_40,
|
|
{ "Reserved", "dcerpc.dg_flags2_rsrvd_40", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFCL2_RESERVED_40, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_flags2_rsrvd_80,
|
|
{ "Reserved", "dcerpc.dg_flags2_rsrvd_80", FT_BOOLEAN, 8, TFS(&tfs_set_notset), PFCL2_RESERVED_80, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_serial_lo,
|
|
{ "Serial Low", "dcerpc.dg_serial_lo", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_serial_hi,
|
|
{ "Serial High", "dcerpc.dg_serial_hi", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_ahint,
|
|
{ "Activity Hint", "dcerpc.dg_ahint", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_ihint,
|
|
{ "Interface Hint", "dcerpc.dg_ihint", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_frag_len,
|
|
{ "Fragment len", "dcerpc.dg_frag_len", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_frag_num,
|
|
{ "Fragment num", "dcerpc.dg_frag_num", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_auth_proto,
|
|
{ "Auth proto", "dcerpc.dg_auth_proto", FT_UINT8, BASE_DEC, VALS(authn_protocol_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_seqnum,
|
|
{ "Sequence num", "dcerpc.dg_seqnum", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_server_boot,
|
|
{ "Server boot time", "dcerpc.dg_server_boot", FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_if_ver,
|
|
{ "Interface Ver", "dcerpc.dg_if_ver", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_krb5_av_prot_level,
|
|
{ "Protection Level", "dcerpc.krb5_av.prot_level", FT_UINT8, BASE_DEC, VALS(authn_level_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_krb5_av_key_vers_num,
|
|
{ "Key Version Number", "dcerpc.krb5_av.key_vers_num", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_krb5_av_key_auth_verifier,
|
|
{ "Authentication Verifier", "dcerpc.krb5_av.auth_verifier", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_obj_id,
|
|
{ "Object", "dcerpc.obj_id", FT_GUID, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_if_id,
|
|
{ "Interface", "dcerpc.dg_if_id", FT_GUID, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_dg_act_id,
|
|
{ "Activity", "dcerpc.dg_act_id", FT_GUID, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_opnum,
|
|
{ "Opnum", "dcerpc.opnum", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_dcerpc_dg_cancel_vers,
|
|
{ "Cancel Version", "dcerpc.dg_cancel_vers", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_dcerpc_dg_cancel_id,
|
|
{ "Cancel ID", "dcerpc.dg_cancel_id", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_dcerpc_dg_server_accepting_cancels,
|
|
{ "Server accepting cancels", "dcerpc.server_accepting_cancels", FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_dcerpc_dg_fack_vers,
|
|
{ "FACK Version", "dcerpc.fack_vers", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_dcerpc_dg_fack_window_size,
|
|
{ "Window Size", "dcerpc.fack_window_size", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_dcerpc_dg_fack_max_tsdu,
|
|
{ "Max TSDU", "dcerpc.fack_max_tsdu", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_dcerpc_dg_fack_max_frag_size,
|
|
{ "Max Frag Size", "dcerpc.fack_max_frag_size", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_dcerpc_dg_fack_serial_num,
|
|
{ "Serial Num", "dcerpc.fack_serial_num", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_dcerpc_dg_fack_selack_len,
|
|
{ "Selective ACK Len", "dcerpc.fack_selack_len", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_dcerpc_dg_fack_selack,
|
|
{ "Selective ACK", "dcerpc.fack_selack", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_dcerpc_dg_status,
|
|
{ "Status", "dcerpc.dg_status", FT_UINT32, BASE_HEX, VALS(reject_status_vals), 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_dcerpc_array_max_count,
|
|
{ "Max Count", "dcerpc.array.max_count", FT_UINT32, BASE_DEC, NULL, 0x0, "Maximum Count: Number of elements in the array", HFILL }},
|
|
|
|
{ &hf_dcerpc_array_offset,
|
|
{ "Offset", "dcerpc.array.offset", FT_UINT32, BASE_DEC, NULL, 0x0, "Offset for first element in array", HFILL }},
|
|
|
|
{ &hf_dcerpc_array_actual_count,
|
|
{ "Actual Count", "dcerpc.array.actual_count", FT_UINT32, BASE_DEC, NULL, 0x0, "Actual Count: Actual number of elements in the array", HFILL }},
|
|
|
|
{ &hf_dcerpc_op,
|
|
{ "Operation", "dcerpc.op", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_dcerpc_fragments,
|
|
{ "Reassembled DCE/RPC Fragments", "dcerpc.fragments", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, "DCE/RPC Fragments", HFILL }},
|
|
|
|
{ &hf_dcerpc_fragment,
|
|
{ "DCE/RPC Fragment", "dcerpc.fragment", FT_FRAMENUM, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_dcerpc_fragment_overlap,
|
|
{ "Fragment overlap", "dcerpc.fragment.overlap", FT_BOOLEAN, BASE_NONE,
|
|
NULL, 0x0, "Fragment overlaps with other fragments", HFILL }},
|
|
|
|
{ &hf_dcerpc_fragment_overlap_conflict,
|
|
{ "Conflicting data in fragment overlap", "dcerpc.fragment.overlap.conflict", FT_BOOLEAN, BASE_NONE,
|
|
NULL, 0x0, "Overlapping fragments contained conflicting data", HFILL }},
|
|
|
|
{ &hf_dcerpc_fragment_multiple_tails,
|
|
{ "Multiple tail fragments found", "dcerpc.fragment.multipletails", FT_BOOLEAN, BASE_NONE,
|
|
NULL, 0x0, "Several tails were found when defragmenting the packet", HFILL }},
|
|
|
|
{ &hf_dcerpc_fragment_too_long_fragment,
|
|
{ "Fragment too long", "dcerpc.fragment.toolongfragment", FT_BOOLEAN, BASE_NONE,
|
|
NULL, 0x0, "Fragment contained data past end of packet", HFILL }},
|
|
|
|
{ &hf_dcerpc_fragment_error,
|
|
{ "Defragmentation error", "dcerpc.fragment.error", FT_FRAMENUM, BASE_NONE,
|
|
NULL, 0x0, "Defragmentation error due to illegal fragments", HFILL }},
|
|
|
|
{ &hf_dcerpc_fragment_count,
|
|
{ "Fragment count", "dcerpc.fragment.count", FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_dcerpc_time,
|
|
{ "Time from request", "dcerpc.time", FT_RELATIVE_TIME, BASE_NONE,
|
|
NULL, 0, "Time between Request and Response for DCE-RPC calls", HFILL }},
|
|
|
|
{ &hf_dcerpc_reassembled_in,
|
|
{ "Reassembled PDU in frame", "dcerpc.reassembled_in", FT_FRAMENUM, BASE_NONE,
|
|
NULL, 0x0, "The DCE/RPC PDU is completely reassembled in the packet with this number", HFILL }},
|
|
|
|
{ &hf_dcerpc_reassembled_length,
|
|
{ "Reassembled DCE/RPC length", "dcerpc.reassembled.length", FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, "The total length of the reassembled payload", HFILL }},
|
|
|
|
{ &hf_dcerpc_unknown_if_id,
|
|
{ "Unknown DCERPC interface id", "dcerpc.unknown_if_id", FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_dcerpc_cn_rts_flags,
|
|
{ "RTS Flags", "dcerpc.cn_rts_flags", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_flags_none,
|
|
{"None", "dcerpc.cn_rts_flags.none", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RTS_FLAG_NONE, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_flags_ping,
|
|
{ "Ping", "dcerpc.cn_rts.flags.ping", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RTS_FLAG_PING, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_flags_other_cmd,
|
|
{ "Other Cmd", "dcerpc.cn_rts_flags.other_cmd", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RTS_FLAG_OTHER_CMD, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_flags_recycle_channel,
|
|
{ "Recycle Channel", "dcerpc.cn_rts_flags.recycle_channel", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RTS_FLAG_RECYCLE_CHANNEL, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_flags_in_channel,
|
|
{ "In Channel", "dcerpc.cn_rts_flags.in_channel", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RTS_FLAG_IN_CHANNEL, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_flags_out_channel,
|
|
{ "Out Channel", "dcerpc.cn_rts_flags.out_channel", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RTS_FLAG_OUT_CHANNEL, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_flags_eof,
|
|
{ "EOF", "dcerpc.cn_rts_flags.eof", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RTS_FLAG_EOF, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_commands_nb,
|
|
{ "RTS Number of Commands", "dcerpc.cn_rts_commands_nb", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_command,
|
|
{ "RTS Command", "dcerpc.cn_rts_command", FT_UINT32, BASE_HEX, VALS(rts_command_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_command_receivewindowsize,
|
|
{"Receive Window Size", "dcerpc.cn_rts_command.receivewindowsize", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_command_fack_bytesreceived,
|
|
{"Bytes Received", "dcerpc.cn_rts_command.fack.bytesreceived", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_command_fack_availablewindow,
|
|
{"Available Window", "dcerpc.cn_rts_command.fack.availablewindow", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_command_fack_channelcookie,
|
|
{"Channel Cookie", "dcerpc.cn_rts_command.fack.channelcookie", FT_GUID, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_command_connectiontimeout,
|
|
{"Connection Timeout", "dcerpc.cn_rts_command.connectiontimeout", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_command_cookie,
|
|
{"Cookie", "dcerpc.cn_rts_command.cookie", FT_GUID, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_command_channellifetime,
|
|
{"Channel Lifetime", "dcerpc.cn_rts_command.channellifetime", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_command_clientkeepalive,
|
|
{"Client Keepalive", "dcerpc.cn_rts_command.clientkeepalive", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_command_version,
|
|
{"Version", "dcerpc.cn_rts_command.version", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_command_conformancecount,
|
|
{"Conformance Count", "dcerpc.cn_rts_command.padding.conformancecount", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_command_padding,
|
|
{ "Padding", "dcerpc.cn_rts_command.padding.padding", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
{ &hf_dcerpc_cn_rts_command_addrtype,
|
|
{ "Address Type", "dcerpc.cn_rts_command.addrtype", FT_UINT32, BASE_DEC, VALS(rts_addresstype_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_command_associationgroupid,
|
|
{"Association Group ID", "dcerpc.cn_rts_command.associationgroupid", FT_GUID, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_command_forwarddestination,
|
|
{"Forward Destination", "dcerpc.cn_rts_command.forwarddestination", FT_UINT32, BASE_DEC, VALS(rts_forward_destination_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_dcerpc_cn_rts_command_pingtrafficsentnotify,
|
|
{"Ping Traffic Sent Notify", "dcerpc.cn_rts_command.pingtrafficsentnotify", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_dcerpc,
|
|
&ett_dcerpc_cn_flags,
|
|
&ett_dcerpc_cn_ctx,
|
|
&ett_dcerpc_cn_iface,
|
|
&ett_dcerpc_cn_trans_syntax,
|
|
&ett_dcerpc_cn_trans_btfn,
|
|
&ett_dcerpc_cn_rts_flags,
|
|
&ett_dcerpc_cn_rts_command,
|
|
&ett_dcerpc_cn_rts_pdu,
|
|
&ett_dcerpc_drep,
|
|
&ett_dcerpc_dg_flags1,
|
|
&ett_dcerpc_dg_flags2,
|
|
&ett_dcerpc_pointer_data,
|
|
&ett_dcerpc_string,
|
|
&ett_dcerpc_fragments,
|
|
&ett_dcerpc_fragment,
|
|
&ett_dcerpc_krb5_auth_verf,
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_dcerpc_fragment, { "dcerpc.fragment", PI_REASSEMBLE, PI_CHAT, "%s fragment", EXPFILL }},
|
|
{ &ei_dcerpc_fragment_reassembled, { "dcerpc.fragment_reassembled", PI_REASSEMBLE, PI_CHAT, "%s fragment, reassembled", EXPFILL }},
|
|
{ &ei_dcerpc_cn_ctx_id_no_bind, { "dcerpc.cn_ctx_id.no_bind", PI_UNDECODED, PI_NOTE, "No bind info for interface Context ID %u - capture start too late?", EXPFILL }},
|
|
{ &ei_dcerpc_no_request_found, { "dcerpc.no_request_found", PI_SEQUENCE, PI_NOTE, "No request to this DCE/RPC call found", EXPFILL }},
|
|
{ &ei_dcerpc_cn_status, { "dcerpc.cn_status.expert", PI_RESPONSE_CODE, PI_NOTE, "Fault: %s", EXPFILL }},
|
|
{ &ei_dcerpc_fragment_multiple, { "dcerpc.fragment_multiple", PI_SEQUENCE, PI_CHAT, "Multiple DCE/RPC fragments/PDU's in one packet", EXPFILL }},
|
|
{ &ei_dcerpc_context_change, { "dcerpc.context_change", PI_SEQUENCE, PI_CHAT, "Context change: %s", EXPFILL }},
|
|
{ &ei_dcerpc_bind_not_acknowledged, { "dcerpc.bind_not_acknowledged", PI_SEQUENCE, PI_WARN, "Bind not acknowledged", EXPFILL }},
|
|
{ &ei_dcerpc_verifier_unavailable, { "dcerpc.verifier_unavailable", PI_UNDECODED, PI_WARN, NULL, EXPFILL }},
|
|
{ &ei_dcerpc_invalid_pdu_authentication_attempt, { "dcerpc.invalid_pdu_authentication_attempt", PI_UNDECODED, PI_WARN, NULL, EXPFILL }},
|
|
};
|
|
|
|
/* Decode As handling */
|
|
static build_valid_func dcerpc_da_build_value[1] = {dcerpc_value};
|
|
static decode_as_value_t dcerpc_da_values = {dcerpc_prompt, 1, dcerpc_da_build_value};
|
|
static decode_as_t dcerpc_da = {"dcerpc", "DCE-RPC",
|
|
/* XXX - DCE/RPC doesn't have a true (sub)dissector table, so
|
|
provide a "fake" one to fit the Decode As algorithm */
|
|
"dcerpc.fake",
|
|
1, 0, &dcerpc_da_values, NULL, NULL,
|
|
dcerpc_populate_list, decode_dcerpc_binding_reset, dcerpc_decode_as_change, dcerpc_decode_as_free};
|
|
|
|
module_t *dcerpc_module;
|
|
expert_module_t* expert_dcerpc;
|
|
|
|
proto_dcerpc = proto_register_protocol("Distributed Computing Environment / Remote Procedure Call (DCE/RPC)", "DCERPC", "dcerpc");
|
|
proto_register_field_array(proto_dcerpc, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
expert_dcerpc = expert_register_protocol(proto_dcerpc);
|
|
expert_register_field_array(expert_dcerpc, ei, array_length(ei));
|
|
|
|
register_init_routine(dcerpc_init_protocol);
|
|
register_cleanup_routine(dcerpc_cleanup_protocol);
|
|
dcerpc_module = prefs_register_protocol(proto_dcerpc, NULL);
|
|
prefs_register_bool_preference(dcerpc_module,
|
|
"desegment_dcerpc",
|
|
"Reassemble DCE/RPC messages spanning multiple TCP segments",
|
|
"Whether the DCE/RPC dissector should reassemble messages"
|
|
" spanning multiple TCP segments."
|
|
" To use this option, you must also enable"
|
|
" \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
|
|
&dcerpc_cn_desegment);
|
|
prefs_register_bool_preference(dcerpc_module,
|
|
"reassemble_dcerpc",
|
|
"Reassemble DCE/RPC fragments",
|
|
"Whether the DCE/RPC dissector should reassemble fragmented DCE/RPC PDUs",
|
|
&dcerpc_reassemble);
|
|
register_init_routine(dcerpc_reassemble_init);
|
|
dcerpc_uuids = g_hash_table_new(dcerpc_uuid_hash, dcerpc_uuid_equal);
|
|
dcerpc_tap = register_tap("dcerpc");
|
|
|
|
register_decode_as(&dcerpc_da);
|
|
|
|
register_srt_table(proto_dcerpc, NULL, 1, dcerpcstat_packet, dcerpcstat_init, dcerpcstat_param);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_dcerpc(void)
|
|
{
|
|
heur_dissector_add("tcp", dissect_dcerpc_tcp, "DCE/RPC over TCP", "dcerpc_tcp", proto_dcerpc, HEURISTIC_ENABLE);
|
|
heur_dissector_add("netbios", dissect_dcerpc_cn_pk, "DCE/RPC over NetBios", "dcerpc_netbios", proto_dcerpc, HEURISTIC_ENABLE);
|
|
heur_dissector_add("udp", dissect_dcerpc_dg, "DCE/RPC over UDP", "dcerpc_udp", proto_dcerpc, HEURISTIC_ENABLE);
|
|
heur_dissector_add("smb_transact", dissect_dcerpc_cn_smbpipe, "DCE/RPC over SMB", "dcerpc_smb_transact", proto_dcerpc, HEURISTIC_ENABLE);
|
|
heur_dissector_add("smb2_heur_subdissectors", dissect_dcerpc_cn_smb2, "DCE/RPC over SMB2", "dcerpc_smb2", proto_dcerpc, HEURISTIC_ENABLE);
|
|
heur_dissector_add("http", dissect_dcerpc_cn_bs, "DCE/RPC over HTTP", "dcerpc_http", proto_dcerpc, HEURISTIC_ENABLE);
|
|
dcerpc_smb_init(proto_dcerpc);
|
|
|
|
guids_add_uuid(&uuid_data_repr_proto, "32bit NDR");
|
|
guids_add_uuid(&uuid_ndr64, "64bit NDR");
|
|
guids_add_uuid(&uuid_bind_time_feature_nego_00, "bind time feature negotiation");
|
|
guids_add_uuid(&uuid_bind_time_feature_nego_01, "bind time feature negotiation");
|
|
guids_add_uuid(&uuid_bind_time_feature_nego_02, "bind time feature negotiation");
|
|
guids_add_uuid(&uuid_bind_time_feature_nego_03, "bind time feature negotiation");
|
|
guids_add_uuid(&uuid_asyncemsmdb, "async MAPI");
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|