259903dc66
Dissectors will temporarily have less pretty output for topleve ref pointers until their output is retuned. svn path=/trunk/; revision=5573
2789 lines
99 KiB
C
2789 lines
99 KiB
C
/* packet-dcerpc.c
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* Routines for DCERPC packet disassembly
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* Copyright 2001, Todd Sabin <tas@webspan.net>
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*
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* $Id: packet-dcerpc.c,v 1.52 2002/05/27 09:50:58 sahlberg Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#include <string.h>
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#include <ctype.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include "packet-dcerpc.h"
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#include <epan/conversation.h>
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#include "prefs.h"
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#include "reassemble.h"
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static const value_string pckt_vals[] = {
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{ 0, "Request"},
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{ 1, "Ping"},
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{ 2, "Response"},
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{ 3, "Fault"},
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{ 4, "Working"},
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{ 5, "Nocall"},
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{ 6, "Reject"},
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{ 7, "Ack"},
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{ 8, "Cl_cancel"},
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{ 9, "Fack"},
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{ 10, "Cancel_ack"},
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{ 11, "Bind"},
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{ 12, "Bind_ack"},
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{ 13, "Bind_nak"},
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{ 14, "Alter_context"},
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{ 15, "Alter_context_resp"},
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{ 16, "AUTH3?"},
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{ 17, "Shutdown"},
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{ 18, "Co_cancel"},
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{ 19, "Orphaned"},
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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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static const value_string drep_fp_vals[] = {
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{ 0, "IEEE" },
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{ 1, "VAX" },
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{ 2, "Cray" },
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{ 3, "IBM" },
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{ 0, NULL }
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};
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static const true_false_string flags_set_truth = {
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"Set",
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"Not set"
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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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{ 0, "None" },
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{ 1, "Kerberos 5" },
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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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#define DCE_C_AUTHN_LEVEL_NONE 1
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#define DCE_C_AUTHN_LEVEL_CONNECT 2
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#define DCE_C_AUTHN_LEVEL_CALL 3
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#define DCE_C_AUTHN_LEVEL_PKT 4
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#define DCE_C_AUTHN_LEVEL_PKT_INTEGRITY 5
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#define DCE_C_AUTHN_LEVEL_PKT_PRIVACY 6
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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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static int proto_dcerpc = -1;
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/* field defines */
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static int hf_dcerpc_request_in = -1;
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static int hf_dcerpc_response_in = -1;
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static int hf_dcerpc_ver = -1;
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static int hf_dcerpc_ver_minor = -1;
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static int hf_dcerpc_packet_type = -1;
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static int hf_dcerpc_cn_flags = -1;
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static int hf_dcerpc_cn_flags_first_frag = -1;
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static int hf_dcerpc_cn_flags_last_frag = -1;
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static int hf_dcerpc_cn_flags_cancel_pending = -1;
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static int hf_dcerpc_cn_flags_reserved = -1;
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static int hf_dcerpc_cn_flags_mpx = -1;
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static int hf_dcerpc_cn_flags_dne = -1;
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static int hf_dcerpc_cn_flags_maybe = -1;
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static int hf_dcerpc_cn_flags_object = -1;
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static int hf_dcerpc_drep = -1;
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static int hf_dcerpc_drep_byteorder = -1;
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static int hf_dcerpc_drep_character = -1;
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static int hf_dcerpc_drep_fp = -1;
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static int hf_dcerpc_cn_frag_len = -1;
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static int hf_dcerpc_cn_auth_len = -1;
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static int hf_dcerpc_cn_call_id = -1;
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static int hf_dcerpc_cn_max_xmit = -1;
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static int hf_dcerpc_cn_max_recv = -1;
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static int hf_dcerpc_cn_assoc_group = -1;
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static int hf_dcerpc_cn_num_ctx_items = -1;
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static int hf_dcerpc_cn_ctx_id = -1;
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static int hf_dcerpc_cn_num_trans_items = -1;
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static int hf_dcerpc_cn_bind_if_id = -1;
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static int hf_dcerpc_cn_bind_if_ver = -1;
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static int hf_dcerpc_cn_bind_if_ver_minor = -1;
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static int hf_dcerpc_cn_bind_trans_id = -1;
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static int hf_dcerpc_cn_bind_trans_ver = -1;
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static int hf_dcerpc_cn_alloc_hint = -1;
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static int hf_dcerpc_cn_sec_addr_len = -1;
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static int hf_dcerpc_cn_sec_addr = -1;
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static int hf_dcerpc_cn_num_results = -1;
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static int hf_dcerpc_cn_ack_result = -1;
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static int hf_dcerpc_cn_ack_reason = -1;
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static int hf_dcerpc_cn_ack_trans_id = -1;
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static int hf_dcerpc_cn_ack_trans_ver = -1;
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static int hf_dcerpc_cn_cancel_count = -1;
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static int hf_dcerpc_auth_type = -1;
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static int hf_dcerpc_auth_level = -1;
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static int hf_dcerpc_auth_pad_len = -1;
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static int hf_dcerpc_auth_rsrvd = -1;
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static int hf_dcerpc_auth_ctx_id = -1;
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static int hf_dcerpc_dg_flags1 = -1;
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static int hf_dcerpc_dg_flags1_rsrvd_01 = -1;
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static int hf_dcerpc_dg_flags1_last_frag = -1;
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static int hf_dcerpc_dg_flags1_frag = -1;
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static int hf_dcerpc_dg_flags1_nofack = -1;
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static int hf_dcerpc_dg_flags1_maybe = -1;
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static int hf_dcerpc_dg_flags1_idempotent = -1;
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static int hf_dcerpc_dg_flags1_broadcast = -1;
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static int hf_dcerpc_dg_flags1_rsrvd_80 = -1;
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static int hf_dcerpc_dg_flags2 = -1;
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static int hf_dcerpc_dg_flags2_rsrvd_01 = -1;
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static int hf_dcerpc_dg_flags2_cancel_pending = -1;
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static int hf_dcerpc_dg_flags2_rsrvd_04 = -1;
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static int hf_dcerpc_dg_flags2_rsrvd_08 = -1;
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static int hf_dcerpc_dg_flags2_rsrvd_10 = -1;
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static int hf_dcerpc_dg_flags2_rsrvd_20 = -1;
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static int hf_dcerpc_dg_flags2_rsrvd_40 = -1;
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static int hf_dcerpc_dg_flags2_rsrvd_80 = -1;
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static int hf_dcerpc_dg_serial_hi = -1;
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static int hf_dcerpc_obj_id = -1;
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static int hf_dcerpc_dg_if_id = -1;
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static int hf_dcerpc_dg_act_id = -1;
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static int hf_dcerpc_dg_serial_lo = -1;
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static int hf_dcerpc_dg_ahint = -1;
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static int hf_dcerpc_dg_ihint = -1;
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static int hf_dcerpc_dg_frag_len = -1;
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static int hf_dcerpc_dg_frag_num = -1;
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static int hf_dcerpc_dg_auth_proto = -1;
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static int hf_dcerpc_opnum = -1;
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static int hf_dcerpc_dg_seqnum = -1;
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static int hf_dcerpc_dg_server_boot = -1;
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static int hf_dcerpc_dg_if_ver = -1;
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static int hf_dcerpc_array_max_count = -1;
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static int hf_dcerpc_array_offset = -1;
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static int hf_dcerpc_array_actual_count = -1;
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static int hf_dcerpc_op = -1;
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static int hf_dcerpc_referent_id = -1;
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static int hf_dcerpc_fragments = -1;
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static int hf_dcerpc_fragment = -1;
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static int hf_dcerpc_fragment_overlap = -1;
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static int hf_dcerpc_fragment_overlap_conflict = -1;
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static int hf_dcerpc_fragment_multiple_tails = -1;
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static int hf_dcerpc_fragment_too_long_fragment = -1;
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static int hf_dcerpc_fragment_error = -1;
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static gint ett_dcerpc = -1;
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static gint ett_dcerpc_cn_flags = -1;
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static gint ett_dcerpc_drep = -1;
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static gint ett_dcerpc_dg_flags1 = -1;
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static gint ett_dcerpc_dg_flags2 = -1;
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static gint ett_dcerpc_pointer_data = -1;
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static gint ett_dcerpc_fragments = -1;
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static gint ett_dcerpc_fragment = -1;
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/* try to desegment big DCE/RPC packets over TCP? */
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static gboolean dcerpc_cn_desegment = TRUE;
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/* reassemble DCE/RPC fragments */
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/* reassembly of dcerpc fragments will not work for the case where ONE frame
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might contain multiple dcerpc fragments for different PDUs.
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this case would be so unusual/weird so if you got captures like that:
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too bad
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*/
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static gboolean dcerpc_reassemble = FALSE;
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static GHashTable *dcerpc_reassemble_table = NULL;
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static void
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dcerpc_reassemble_init(void)
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{
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fragment_table_init(&dcerpc_reassemble_table);
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}
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/*
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* Subdissectors
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*/
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/* the registered subdissectors */
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static GHashTable *dcerpc_uuids;
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typedef struct _dcerpc_uuid_key {
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e_uuid_t uuid;
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guint16 ver;
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} dcerpc_uuid_key;
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typedef struct _dcerpc_uuid_value {
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int proto;
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int ett;
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gchar *name;
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dcerpc_sub_dissector *procs;
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} dcerpc_uuid_value;
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static gint
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dcerpc_uuid_equal (gconstpointer k1, gconstpointer k2)
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{
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dcerpc_uuid_key *key1 = (dcerpc_uuid_key *)k1;
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dcerpc_uuid_key *key2 = (dcerpc_uuid_key *)k2;
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return ((memcmp (&key1->uuid, &key2->uuid, sizeof (e_uuid_t)) == 0)
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&& (key1->ver == key2->ver));
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}
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static guint
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dcerpc_uuid_hash (gconstpointer k)
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{
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dcerpc_uuid_key *key = (dcerpc_uuid_key *)k;
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/* This isn't perfect, but the Data1 part of these is almost always
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unique. */
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return key->uuid.Data1;
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}
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void
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dcerpc_init_uuid (int proto, int ett, e_uuid_t *uuid, guint16 ver,
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dcerpc_sub_dissector *procs)
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{
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dcerpc_uuid_key *key = g_malloc (sizeof (*key));
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dcerpc_uuid_value *value = g_malloc (sizeof (*value));
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key->uuid = *uuid;
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key->ver = ver;
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value->proto = proto;
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value->ett = ett;
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value->name = proto_get_protocol_short_name (proto);
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value->procs = procs;
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g_hash_table_insert (dcerpc_uuids, key, value);
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}
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/*
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* To keep track of ctx_id mappings.
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*
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* Everytime we see a bind call we update this table.
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* Note that we always specify a SMB FID. For non-SMB transports this
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* value is 0.
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*/
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static GHashTable *dcerpc_binds=NULL;
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typedef struct _dcerpc_bind_key {
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conversation_t *conv;
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guint16 ctx_id;
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guint16 smb_fid;
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} dcerpc_bind_key;
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typedef struct _dcerpc_bind_value {
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e_uuid_t uuid;
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guint16 ver;
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} dcerpc_bind_value;
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static GMemChunk *dcerpc_bind_key_chunk=NULL;
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static GMemChunk *dcerpc_bind_value_chunk=NULL;
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static gint
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dcerpc_bind_equal (gconstpointer k1, gconstpointer k2)
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{
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dcerpc_bind_key *key1 = (dcerpc_bind_key *)k1;
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dcerpc_bind_key *key2 = (dcerpc_bind_key *)k2;
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return (key1->conv == key2->conv
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&& key1->ctx_id == key2->ctx_id
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&& key1->smb_fid == key2->smb_fid);
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}
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static guint
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dcerpc_bind_hash (gconstpointer k)
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{
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dcerpc_bind_key *key = (dcerpc_bind_key *)k;
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return ((guint)key->conv) + key->ctx_id + key->smb_fid;
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}
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/*
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* To keep track of callid mappings. Should really use some generic
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* conversation support instead.
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*/
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static GHashTable *dcerpc_calls=NULL;
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typedef struct _dcerpc_call_key {
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conversation_t *conv;
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guint32 call_id;
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guint16 smb_fid;
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} dcerpc_call_key;
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static GMemChunk *dcerpc_call_key_chunk=NULL;
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static GMemChunk *dcerpc_call_value_chunk=NULL;
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static gint
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dcerpc_call_equal (gconstpointer k1, gconstpointer k2)
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{
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dcerpc_call_key *key1 = (dcerpc_call_key *)k1;
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dcerpc_call_key *key2 = (dcerpc_call_key *)k2;
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return (key1->conv == key2->conv
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&& key1->call_id == key2->call_id
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&& key1->smb_fid == key2->smb_fid);
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}
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static guint
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dcerpc_call_hash (gconstpointer k)
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{
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dcerpc_call_key *key = (dcerpc_call_key *)k;
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return ((guint32)key->conv) + key->call_id + key->smb_fid;
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}
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/* to keep track of matched calls/responses
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this one uses the same value struct as calls, but the key is the frame id
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*/
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static GHashTable *dcerpc_matched=NULL;
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static gint
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dcerpc_matched_equal (gconstpointer k1, gconstpointer k2)
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{
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return (guint32)k1 == (guint32)k2;
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}
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static guint
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dcerpc_matched_hash (gconstpointer k)
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{
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return (guint32)k;
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}
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/*
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* Utility functions. Modeled after packet-rpc.c
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*/
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int
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dissect_dcerpc_uint8 (tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
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proto_tree *tree, char *drep,
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int hfindex, guint8 *pdata)
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{
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guint8 data;
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data = tvb_get_guint8 (tvb, offset);
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if (tree) {
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proto_tree_add_item (tree, hfindex, tvb, offset, 1, (drep[0] & 0x10));
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}
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if (pdata)
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*pdata = data;
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return offset + 1;
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}
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int
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dissect_dcerpc_uint16 (tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
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proto_tree *tree, char *drep,
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int hfindex, guint16 *pdata)
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{
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guint16 data;
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data = ((drep[0] & 0x10)
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? tvb_get_letohs (tvb, offset)
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: tvb_get_ntohs (tvb, offset));
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if (tree) {
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proto_tree_add_item (tree, hfindex, tvb, offset, 2, (drep[0] & 0x10));
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}
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if (pdata)
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*pdata = data;
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return offset + 2;
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}
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int
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dissect_dcerpc_uint32 (tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
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proto_tree *tree, char *drep,
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int hfindex, guint32 *pdata)
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{
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guint32 data;
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data = ((drep[0] & 0x10)
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? tvb_get_letohl (tvb, offset)
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: tvb_get_ntohl (tvb, offset));
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if (tree) {
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proto_tree_add_item (tree, hfindex, tvb, offset, 4, (drep[0] & 0x10));
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}
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if (pdata)
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*pdata = data;
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return offset+4;
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}
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int
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dissect_dcerpc_uint64 (tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
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proto_tree *tree, char *drep,
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int hfindex, unsigned char *pdata)
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|
{
|
|
if(pdata){
|
|
tvb_memcpy(tvb, pdata, offset, 8);
|
|
if(drep[0] & 0x10){/* XXX this might be the wrong way around */
|
|
unsigned char data;
|
|
data=pdata[0];pdata[0]=pdata[7];pdata[7]=data;
|
|
data=pdata[1];pdata[1]=pdata[6];pdata[6]=data;
|
|
data=pdata[2];pdata[2]=pdata[5];pdata[5]=data;
|
|
data=pdata[3];pdata[3]=pdata[4];pdata[4]=data;
|
|
}
|
|
}
|
|
|
|
if (tree) {
|
|
proto_tree_add_item(tree, hfindex, tvb, offset, 8, (drep[0] & 0x10));
|
|
}
|
|
|
|
return offset+8;
|
|
}
|
|
|
|
/*
|
|
* a couple simpler things
|
|
*/
|
|
guint16
|
|
dcerpc_tvb_get_ntohs (tvbuff_t *tvb, gint offset, char *drep)
|
|
{
|
|
if (drep[0] & 0x10) {
|
|
return tvb_get_letohs (tvb, offset);
|
|
} else {
|
|
return tvb_get_ntohs (tvb, offset);
|
|
}
|
|
}
|
|
|
|
guint32
|
|
dcerpc_tvb_get_ntohl (tvbuff_t *tvb, gint offset, char *drep)
|
|
{
|
|
if (drep[0] & 0x10) {
|
|
return tvb_get_letohl (tvb, offset);
|
|
} else {
|
|
return tvb_get_ntohl (tvb, offset);
|
|
}
|
|
}
|
|
|
|
void
|
|
dcerpc_tvb_get_uuid (tvbuff_t *tvb, gint offset, char *drep, e_uuid_t *uuid)
|
|
{
|
|
unsigned int i;
|
|
uuid->Data1 = dcerpc_tvb_get_ntohl (tvb, offset, drep);
|
|
uuid->Data2 = dcerpc_tvb_get_ntohs (tvb, offset+4, drep);
|
|
uuid->Data3 = dcerpc_tvb_get_ntohs (tvb, offset+6, drep);
|
|
|
|
for (i=0; i<sizeof (uuid->Data4); i++) {
|
|
uuid->Data4[i] = tvb_get_guint8 (tvb, offset+8+i);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/* NDR arrays */
|
|
/* function to dissect a unidimensional conformant array */
|
|
int
|
|
dissect_ndr_ucarray(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *tree, char *drep,
|
|
dcerpc_dissect_fnct_t *fnct)
|
|
{
|
|
guint32 i;
|
|
dcerpc_info *di;
|
|
int old_offset;
|
|
|
|
di=pinfo->private_data;
|
|
if(di->conformant_run){
|
|
/* conformant run, just dissect the max_count header */
|
|
old_offset=offset;
|
|
di->conformant_run=0;
|
|
offset = dissect_ndr_uint32 (tvb, offset, pinfo, tree, drep,
|
|
hf_dcerpc_array_max_count, &di->array_max_count);
|
|
di->array_max_count_offset=offset-4;
|
|
di->conformant_run=1;
|
|
di->conformant_eaten=offset-old_offset;
|
|
} else {
|
|
/* we dont dont remember where in the bytestream this fields was */
|
|
proto_tree_add_uint(tree, hf_dcerpc_array_max_count, tvb, di->array_max_count_offset, 4, di->array_max_count);
|
|
|
|
/* real run, dissect the elements */
|
|
for(i=0;i<di->array_max_count;i++){
|
|
offset = (*fnct)(tvb, offset, pinfo, tree, drep);
|
|
}
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
/* function to dissect a unidimensional conformant and varying array */
|
|
int
|
|
dissect_ndr_ucvarray(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *tree, char *drep,
|
|
dcerpc_dissect_fnct_t *fnct)
|
|
{
|
|
guint32 i;
|
|
dcerpc_info *di;
|
|
int old_offset;
|
|
|
|
di=pinfo->private_data;
|
|
if(di->conformant_run){
|
|
/* conformant run, just dissect the max_count header */
|
|
old_offset=offset;
|
|
di->conformant_run=0;
|
|
offset = dissect_ndr_uint32 (tvb, offset, pinfo, tree, drep,
|
|
hf_dcerpc_array_max_count, &di->array_max_count);
|
|
di->array_max_count_offset=offset-4;
|
|
offset = dissect_ndr_uint32 (tvb, offset, pinfo, tree, drep,
|
|
hf_dcerpc_array_offset, &di->array_offset);
|
|
di->array_offset_offset=offset-4;
|
|
offset = dissect_ndr_uint32 (tvb, offset, pinfo, tree, drep,
|
|
hf_dcerpc_array_actual_count, &di->array_actual_count);
|
|
di->array_actual_count_offset=offset-4;
|
|
di->conformant_run=1;
|
|
di->conformant_eaten=offset-old_offset;
|
|
} else {
|
|
/* we dont dont remember where in the bytestream these fields were */
|
|
proto_tree_add_uint(tree, hf_dcerpc_array_max_count, tvb, di->array_max_count_offset, 4, di->array_max_count);
|
|
proto_tree_add_uint(tree, hf_dcerpc_array_offset, tvb, di->array_offset_offset, 4, di->array_offset);
|
|
proto_tree_add_uint(tree, hf_dcerpc_array_actual_count, tvb, di->array_actual_count_offset, 4, di->array_actual_count);
|
|
|
|
/* real run, dissect the elements */
|
|
for(i=0;i<di->array_actual_count;i++){
|
|
offset = (*fnct)(tvb, offset, pinfo, tree, drep);
|
|
}
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
|
|
/* 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_tree *tree;
|
|
dcerpc_dissect_fnct_t *fnct; /*if non-NULL, we have not called it yet*/
|
|
int hf_index;
|
|
int levels;
|
|
} ndr_pointer_data_t;
|
|
|
|
static void
|
|
init_ndr_pointer_list(packet_info *pinfo)
|
|
{
|
|
dcerpc_info *di;
|
|
|
|
di=pinfo->private_data;
|
|
di->conformant_run=0;
|
|
|
|
while(ndr_pointer_list){
|
|
ndr_pointer_data_t *npd;
|
|
|
|
npd=g_slist_nth_data(ndr_pointer_list, 0);
|
|
ndr_pointer_list=g_slist_remove(ndr_pointer_list, npd);
|
|
if(npd){
|
|
g_free(npd);
|
|
}
|
|
}
|
|
|
|
ndr_pointer_list=NULL;
|
|
ndr_pointer_list_pos=0;
|
|
pointers_are_top_level=TRUE;
|
|
}
|
|
|
|
static int
|
|
dissect_deferred_pointers(packet_info *pinfo, tvbuff_t *tvb, int offset, char *drep)
|
|
{
|
|
int found_new_pointer;
|
|
dcerpc_info *di;
|
|
int old_offset;
|
|
|
|
di=pinfo->private_data;
|
|
do{
|
|
int i, len;
|
|
|
|
found_new_pointer=0;
|
|
len=g_slist_length(ndr_pointer_list);
|
|
for(i=0;i<len;i++){
|
|
ndr_pointer_data_t *tnpd;
|
|
tnpd=g_slist_nth_data(ndr_pointer_list, i);
|
|
if(tnpd->fnct){
|
|
dcerpc_dissect_fnct_t *fnct;
|
|
|
|
found_new_pointer=1;
|
|
fnct=tnpd->fnct;
|
|
tnpd->fnct=NULL;
|
|
ndr_pointer_list_pos=i+1;
|
|
di->hf_index=tnpd->hf_index;
|
|
di->levels=tnpd->levels;
|
|
/* 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, drep);
|
|
|
|
g_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
|
|
* discreption, 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;
|
|
*
|
|
* di=pinfo->private_data;
|
|
* 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;
|
|
offset = (*(fnct))(tvb, offset, pinfo, tnpd->tree, drep);
|
|
break;
|
|
}
|
|
}
|
|
} while(found_new_pointer);
|
|
|
|
return offset;
|
|
}
|
|
|
|
|
|
static void
|
|
add_pointer_to_list(packet_info *pinfo, proto_tree *tree,
|
|
dcerpc_dissect_fnct_t *fnct, guint32 id, int hf_index, int levels)
|
|
{
|
|
ndr_pointer_data_t *npd;
|
|
|
|
/* check if this pointer is valid */
|
|
if(id!=0xffffffff){
|
|
dcerpc_info *di;
|
|
dcerpc_call_value *value;
|
|
|
|
di=pinfo->private_data;
|
|
value=di->call_data;
|
|
|
|
if(di->request){
|
|
if(!(pinfo->fd->flags.visited)){
|
|
if(id>value->max_ptr){
|
|
value->max_ptr=id;
|
|
}
|
|
}
|
|
} else {
|
|
/* if we havent seen the request bail out since we cant
|
|
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=g_malloc(sizeof(ndr_pointer_data_t));
|
|
npd->id=id;
|
|
npd->tree=tree;
|
|
npd->fnct=fnct;
|
|
npd->hf_index=hf_index;
|
|
npd->levels=levels;
|
|
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=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 pich this one up from di->hf_index.
|
|
*
|
|
* levels is a generic int we want to pass to teh callback function. the
|
|
* callback can later pick it up from di->levels
|
|
*
|
|
* See packet-dcerpc-samr.c for examples
|
|
*/
|
|
int
|
|
dissect_ndr_pointer(tvbuff_t *tvb, gint offset, packet_info *pinfo,
|
|
proto_tree *tree, char *drep, dcerpc_dissect_fnct_t *fnct,
|
|
int type, char *text, int hf_index, int levels)
|
|
{
|
|
dcerpc_info *di;
|
|
|
|
di=pinfo->private_data;
|
|
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;
|
|
}
|
|
|
|
/*TOP LEVEL REFERENCE POINTER*/
|
|
if( pointers_are_top_level
|
|
&&(type==NDR_POINTER_REF) ){
|
|
proto_item *item;
|
|
proto_tree *tr;
|
|
|
|
/* we must find out a nice way to do the length here */
|
|
item=proto_tree_add_text(tree, tvb, offset, 0,
|
|
"%s", text);
|
|
tr=proto_item_add_subtree(item,ett_dcerpc_pointer_data);
|
|
|
|
add_pointer_to_list(pinfo, tr, fnct, 0xffffffff, hf_index, levels);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/*TOP LEVEL FULL POINTER*/
|
|
if( pointers_are_top_level
|
|
&& (type==NDR_POINTER_PTR) ){
|
|
int idx;
|
|
guint32 id;
|
|
proto_item *item;
|
|
proto_tree *tr;
|
|
|
|
/* get the referent id */
|
|
offset = dissect_ndr_uint32(tvb, offset, pinfo, NULL, drep, -1, &id);
|
|
|
|
/* we got a NULL pointer */
|
|
if(id==0){
|
|
proto_tree_add_text(tree, tvb, offset-4, 4,
|
|
"(NULL pointer) %s",text);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/* see if we have seen this pointer before */
|
|
idx=find_pointer_index(id);
|
|
|
|
/* we have seen this pointer before */
|
|
if(idx>=0){
|
|
proto_tree_add_text(tree, tvb, offset-4, 4,
|
|
"(duplicate PTR) %s",text);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/* new pointer */
|
|
item=proto_tree_add_text(tree, tvb, offset-4, 4,
|
|
"%s", text);
|
|
tr=proto_item_add_subtree(item,ett_dcerpc_pointer_data);
|
|
proto_tree_add_uint(tr, hf_dcerpc_referent_id, tvb, offset-4, 4, id);
|
|
add_pointer_to_list(pinfo, tr, fnct, id, hf_index, levels);
|
|
goto after_ref_id;
|
|
}
|
|
/*TOP LEVEL UNIQUE POINTER*/
|
|
if( pointers_are_top_level
|
|
&& (type==NDR_POINTER_UNIQUE) ){
|
|
guint32 id;
|
|
proto_item *item;
|
|
proto_tree *tr;
|
|
|
|
/* get the referent id */
|
|
offset = dissect_ndr_uint32(tvb, offset, pinfo, NULL, drep, -1, &id);
|
|
|
|
/* we got a NULL pointer */
|
|
if(id==0){
|
|
proto_tree_add_text(tree, tvb, offset-4, 4,
|
|
"(NULL pointer) %s",text);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/* new pointer */
|
|
item=proto_tree_add_text(tree, tvb, offset-4, 4,
|
|
"%s", text);
|
|
tr=proto_item_add_subtree(item,ett_dcerpc_pointer_data);
|
|
proto_tree_add_uint(tr, hf_dcerpc_referent_id, tvb, offset-4, 4, id);
|
|
add_pointer_to_list(pinfo, tr, fnct, 0xffffffff, hf_index, levels);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/*EMBEDDED REFERENCE POINTER*/
|
|
if( (!pointers_are_top_level)
|
|
&& (type==NDR_POINTER_REF) ){
|
|
guint32 id;
|
|
proto_item *item;
|
|
proto_tree *tr;
|
|
|
|
/* get the referent id */
|
|
offset = dissect_ndr_uint32(tvb, offset, pinfo, NULL, drep, -1, &id);
|
|
|
|
/* new pointer */
|
|
item=proto_tree_add_text(tree, tvb, offset-4, 4,
|
|
"%s",text);
|
|
tr=proto_item_add_subtree(item,ett_dcerpc_pointer_data);
|
|
proto_tree_add_uint(tr, hf_dcerpc_referent_id, tvb, offset-4, 4, id);
|
|
add_pointer_to_list(pinfo, tr, fnct, 0xffffffff, hf_index, levels);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/*EMBEDDED UNIQUE POINTER*/
|
|
if( (!pointers_are_top_level)
|
|
&& (type==NDR_POINTER_UNIQUE) ){
|
|
guint32 id;
|
|
proto_item *item;
|
|
proto_tree *tr;
|
|
|
|
/* get the referent id */
|
|
offset = dissect_ndr_uint32(tvb, offset, pinfo, NULL, drep, -1, &id);
|
|
|
|
/* we got a NULL pointer */
|
|
if(id==0){
|
|
proto_tree_add_text(tree, tvb, offset-4, 4,
|
|
"(NULL pointer) %s", text);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/* new pointer */
|
|
item=proto_tree_add_text(tree, tvb, offset-4, 4,
|
|
"%s",text);
|
|
tr=proto_item_add_subtree(item,ett_dcerpc_pointer_data);
|
|
proto_tree_add_uint(tr, hf_dcerpc_referent_id, tvb, offset-4, 4, id);
|
|
add_pointer_to_list(pinfo, tr, fnct, 0xffffffff, hf_index, levels);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/*EMBEDDED FULL POINTER*/
|
|
if( (!pointers_are_top_level)
|
|
&& (type==NDR_POINTER_PTR) ){
|
|
int idx;
|
|
guint32 id;
|
|
proto_item *item;
|
|
proto_tree *tr;
|
|
|
|
/* get the referent id */
|
|
offset = dissect_ndr_uint32(tvb, offset, pinfo, NULL, drep, -1, &id);
|
|
|
|
/* we got a NULL pointer */
|
|
if(id==0){
|
|
proto_tree_add_text(tree, tvb, offset-4, 4,
|
|
"(NULL pointer) %s",text);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/* see if we have seen this pointer before */
|
|
idx=find_pointer_index(id);
|
|
|
|
/* we have seen this pointer before */
|
|
if(idx>=0){
|
|
proto_tree_add_text(tree, tvb, offset-4, 4,
|
|
"(duplicate PTR) %s",text);
|
|
goto after_ref_id;
|
|
}
|
|
|
|
/* new pointer */
|
|
item=proto_tree_add_text(tree, tvb, offset-4, 4,
|
|
"%s", text);
|
|
tr=proto_item_add_subtree(item,ett_dcerpc_pointer_data);
|
|
proto_tree_add_uint(tr, hf_dcerpc_referent_id, tvb, offset-4, 4, id);
|
|
add_pointer_to_list(pinfo, tr, fnct, id, hf_index, levels);
|
|
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, drep);
|
|
pointers_are_top_level=TRUE;
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
dcerpc_try_handoff (packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *dcerpc_tree,
|
|
tvbuff_t *tvb, gint offset,
|
|
guint16 opnum, gboolean is_rqst,
|
|
char *drep, dcerpc_info *info,
|
|
int auth_level)
|
|
{
|
|
dcerpc_uuid_key key;
|
|
dcerpc_uuid_value *sub_proto;
|
|
int length;
|
|
proto_tree *sub_tree = NULL;
|
|
dcerpc_sub_dissector *proc;
|
|
gchar *name = NULL;
|
|
dcerpc_dissect_fnct_t *sub_dissect;
|
|
const char *saved_proto;
|
|
void *saved_private_data;
|
|
|
|
key.uuid = info->call_data->uuid;
|
|
key.ver = info->call_data->ver;
|
|
|
|
|
|
if ((sub_proto = 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.
|
|
*/
|
|
length = tvb_length_remaining (tvb, offset);
|
|
if (length > 0) {
|
|
proto_tree_add_text (dcerpc_tree, tvb, offset, length,
|
|
"Stub data (%d byte%s)", length,
|
|
plurality(length, "", "s"));
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
for (proc = sub_proto->procs; proc->name; proc++) {
|
|
if (proc->num == opnum) {
|
|
name = proc->name;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!name)
|
|
name = "Unknown?!";
|
|
|
|
if (check_col (pinfo->cinfo, COL_PROTOCOL)) {
|
|
col_set_str (pinfo->cinfo, COL_PROTOCOL, sub_proto->name);
|
|
}
|
|
|
|
if (check_col (pinfo->cinfo, COL_INFO)) {
|
|
col_add_fstr (pinfo->cinfo, COL_INFO, "%s %s",
|
|
name, is_rqst ? "request" : "reply");
|
|
}
|
|
|
|
if (tree) {
|
|
proto_item *sub_item;
|
|
sub_item = proto_tree_add_item (tree, sub_proto->proto, tvb, offset,
|
|
-1, FALSE);
|
|
|
|
if (sub_item) {
|
|
sub_tree = proto_item_add_subtree (sub_item, sub_proto->ett);
|
|
}
|
|
|
|
/*
|
|
* Put the operation number into the tree along with
|
|
* the operation's name.
|
|
*
|
|
* XXX - the subdissectors should all have their own fields
|
|
* for the opnum, so that you can filter on a particular
|
|
* protocol and opnum value; the opnum value isn't, by itself,
|
|
* very interesting, as its interpretation depends on the
|
|
* subprotocol.
|
|
*
|
|
* That would also allow the field to have a value_string
|
|
* table, giving names for operations, and letting you filter
|
|
* by name.
|
|
*
|
|
* ONC RPC should do the same thing with the version and
|
|
* procedure fields it puts into the subprotocol's tree.
|
|
*/
|
|
proto_tree_add_uint_format (sub_tree, hf_dcerpc_op, tvb,
|
|
0, 0, opnum,
|
|
"Operation: %s (%u)",
|
|
name, opnum);
|
|
}
|
|
|
|
/*
|
|
* If the authentication level is DCE_C_AUTHN_LEVEL_PKT_PRIVACY,
|
|
* the stub data is encrypted, and we can't dissect it.
|
|
*/
|
|
if (auth_level == DCE_C_AUTHN_LEVEL_PKT_PRIVACY) {
|
|
length = tvb_length_remaining (tvb, offset);
|
|
if (length > 0) {
|
|
proto_tree_add_text(sub_tree, tvb, offset, length,
|
|
"Encrypted stub data (%d byte%s)",
|
|
length, plurality(length, "", "s"));
|
|
}
|
|
} else {
|
|
sub_dissect = is_rqst ? proc->dissect_rqst : proc->dissect_resp;
|
|
if (sub_dissect) {
|
|
saved_proto = pinfo->current_proto;
|
|
saved_private_data = pinfo->private_data;
|
|
pinfo->current_proto = sub_proto->name;
|
|
pinfo->private_data = (void *)info;
|
|
|
|
init_ndr_pointer_list(pinfo);
|
|
offset = sub_dissect (tvb, offset, pinfo, sub_tree, drep);
|
|
|
|
pinfo->current_proto = saved_proto;
|
|
pinfo->private_data = saved_private_data;
|
|
} else {
|
|
length = tvb_length_remaining (tvb, offset);
|
|
if (length > 0) {
|
|
proto_tree_add_text (sub_tree, tvb, offset, length,
|
|
"Stub data (%d byte%s)", length,
|
|
plurality(length, "", "s"));
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
dissect_dcerpc_cn_auth (tvbuff_t *tvb, packet_info *pinfo, proto_tree *dcerpc_tree,
|
|
e_dce_cn_common_hdr_t *hdr, int *auth_level_p)
|
|
{
|
|
int offset;
|
|
guint8 auth_pad_len;
|
|
guint8 auth_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 we've got an auth len, and it's
|
|
* valid, then dissect the auth info.
|
|
*/
|
|
if (tvb_length (tvb) >= hdr->frag_len
|
|
&& hdr->auth_len
|
|
&& (hdr->auth_len + 8 <= hdr->frag_len)) {
|
|
|
|
offset = hdr->frag_len - (hdr->auth_len + 8);
|
|
|
|
offset = dissect_dcerpc_uint8 (tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_auth_type, NULL);
|
|
offset = dissect_dcerpc_uint8 (tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_auth_level, &auth_level);
|
|
if (auth_level_p != NULL)
|
|
*auth_level_p = auth_level;
|
|
offset = dissect_dcerpc_uint8 (tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_auth_pad_len, &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);
|
|
|
|
proto_tree_add_text (dcerpc_tree, tvb, offset, hdr->auth_len, "Auth Data");
|
|
|
|
/* figure out where the auth padding starts */
|
|
offset = hdr->frag_len - (hdr->auth_len + 8 + auth_pad_len);
|
|
if (offset > 0 && auth_pad_len) {
|
|
proto_tree_add_text (dcerpc_tree, tvb, offset,
|
|
auth_pad_len, "Auth padding");
|
|
return hdr->auth_len + 8 + auth_pad_len;
|
|
} else {
|
|
return hdr->auth_len + 8;
|
|
}
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
|
|
/* 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. */
|
|
|
|
static guint16 get_smb_fid (void *private_data)
|
|
{
|
|
dcerpc_private_info *priv = (dcerpc_private_info *)private_data;
|
|
|
|
if (!priv)
|
|
return 0; /* Nothing to see here */
|
|
|
|
/* DCERPC over smb */
|
|
|
|
if (priv->transport_type == DCERPC_TRANSPORT_SMB)
|
|
return priv->data.smb.fid;
|
|
|
|
/* Some other transport... */
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Connection oriented packet types
|
|
*/
|
|
|
|
static void
|
|
dissect_dcerpc_cn_bind (tvbuff_t *tvb, packet_info *pinfo, proto_tree *dcerpc_tree,
|
|
e_dce_cn_common_hdr_t *hdr)
|
|
{
|
|
conversation_t *conv = NULL;
|
|
guint8 num_ctx_items;
|
|
guint i;
|
|
gboolean saw_ctx_item = FALSE;
|
|
guint16 ctx_id;
|
|
guint16 num_trans_items;
|
|
guint j;
|
|
e_uuid_t if_id;
|
|
e_uuid_t trans_id;
|
|
guint32 trans_ver;
|
|
guint16 if_ver, if_ver_minor;
|
|
int offset = 16;
|
|
|
|
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;
|
|
|
|
for (i = 0; i < num_ctx_items; i++) {
|
|
offset = dissect_dcerpc_uint16 (tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_ctx_id, &ctx_id);
|
|
|
|
offset = dissect_dcerpc_uint16 (tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_num_trans_items, &num_trans_items);
|
|
|
|
dcerpc_tvb_get_uuid (tvb, offset, hdr->drep, &if_id);
|
|
if (dcerpc_tree) {
|
|
proto_tree_add_string_format (dcerpc_tree, hf_dcerpc_cn_bind_if_id, tvb,
|
|
offset, 16, "HMMM",
|
|
"Interface UUID: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
|
|
if_id.Data1, if_id.Data2, if_id.Data3,
|
|
if_id.Data4[0], if_id.Data4[1],
|
|
if_id.Data4[2], if_id.Data4[3],
|
|
if_id.Data4[4], if_id.Data4[5],
|
|
if_id.Data4[6], if_id.Data4[7]);
|
|
}
|
|
offset += 16;
|
|
|
|
if (hdr->drep[0] & 0x10) {
|
|
offset = dissect_dcerpc_uint16 (tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_bind_if_ver, &if_ver);
|
|
offset = dissect_dcerpc_uint16 (tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_bind_if_ver_minor, &if_ver_minor);
|
|
} else {
|
|
offset = dissect_dcerpc_uint16 (tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_bind_if_ver_minor, &if_ver_minor);
|
|
offset = dissect_dcerpc_uint16 (tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_bind_if_ver, &if_ver);
|
|
}
|
|
|
|
if (!saw_ctx_item) {
|
|
conv = find_conversation (&pinfo->src, &pinfo->dst, pinfo->ptype,
|
|
pinfo->srcport, pinfo->destport, 0);
|
|
if (conv == NULL) {
|
|
conv = conversation_new (&pinfo->src, &pinfo->dst, pinfo->ptype,
|
|
pinfo->srcport, pinfo->destport, 0);
|
|
}
|
|
|
|
/* if this is the first time we see 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 = g_mem_chunk_alloc (dcerpc_bind_key_chunk);
|
|
key->conv = conv;
|
|
key->ctx_id = ctx_id;
|
|
key->smb_fid = get_smb_fid(pinfo->private_data);
|
|
|
|
value = g_mem_chunk_alloc (dcerpc_bind_value_chunk);
|
|
value->uuid = if_id;
|
|
value->ver = if_ver;
|
|
|
|
/* add this entry to the bind table, first removing any
|
|
previous ones that are identical
|
|
*/
|
|
if(g_hash_table_lookup(dcerpc_binds, key)){
|
|
g_hash_table_remove(dcerpc_binds, key);
|
|
}
|
|
g_hash_table_insert (dcerpc_binds, key, value);
|
|
}
|
|
|
|
if (check_col (pinfo->cinfo, COL_INFO)) {
|
|
col_add_fstr (pinfo->cinfo, COL_INFO, "%s: UUID %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x ver %d.%d",
|
|
hdr->ptype == PDU_BIND ? "Bind" : "Alter Ctx",
|
|
if_id.Data1, if_id.Data2, if_id.Data3,
|
|
if_id.Data4[0], if_id.Data4[1],
|
|
if_id.Data4[2], if_id.Data4[3],
|
|
if_id.Data4[4], if_id.Data4[5],
|
|
if_id.Data4[6], if_id.Data4[7],
|
|
if_ver, if_ver_minor);
|
|
}
|
|
saw_ctx_item = TRUE;
|
|
}
|
|
|
|
for (j = 0; j < num_trans_items; j++) {
|
|
dcerpc_tvb_get_uuid (tvb, offset, hdr->drep, &trans_id);
|
|
if (dcerpc_tree) {
|
|
proto_tree_add_string_format (dcerpc_tree, hf_dcerpc_cn_bind_trans_id, tvb,
|
|
offset, 16, "HMMM",
|
|
"Transfer Syntax: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
|
|
trans_id.Data1, trans_id.Data2, trans_id.Data3,
|
|
trans_id.Data4[0], trans_id.Data4[1],
|
|
trans_id.Data4[2], trans_id.Data4[3],
|
|
trans_id.Data4[4], trans_id.Data4[5],
|
|
trans_id.Data4[6], trans_id.Data4[7]);
|
|
}
|
|
offset += 16;
|
|
|
|
offset = dissect_dcerpc_uint32 (tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_bind_trans_ver, &trans_ver);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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, pinfo, dcerpc_tree, hdr, NULL);
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_cn_bind_ack (tvbuff_t *tvb, 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;
|
|
guint16 reason;
|
|
e_uuid_t trans_id;
|
|
guint32 trans_ver;
|
|
|
|
int offset = 16;
|
|
|
|
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, FALSE);
|
|
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;
|
|
|
|
for (i = 0; i < num_results; i++) {
|
|
offset = dissect_dcerpc_uint16 (tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_cn_ack_result,
|
|
&result);
|
|
offset = dissect_dcerpc_uint16 (tvb, offset, pinfo, dcerpc_tree,
|
|
hdr->drep, hf_dcerpc_cn_ack_reason,
|
|
&reason);
|
|
|
|
dcerpc_tvb_get_uuid (tvb, offset, hdr->drep, &trans_id);
|
|
if (dcerpc_tree) {
|
|
proto_tree_add_string_format (dcerpc_tree, hf_dcerpc_cn_ack_trans_id, tvb,
|
|
offset, 16, "HMMM",
|
|
"Transfer Syntax: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
|
|
trans_id.Data1, trans_id.Data2, trans_id.Data3,
|
|
trans_id.Data4[0], trans_id.Data4[1],
|
|
trans_id.Data4[2], trans_id.Data4[3],
|
|
trans_id.Data4[4], trans_id.Data4[5],
|
|
trans_id.Data4[6], trans_id.Data4[7]);
|
|
}
|
|
offset += 16;
|
|
|
|
offset = dissect_dcerpc_uint32 (tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_cn_ack_trans_ver, &trans_ver);
|
|
}
|
|
|
|
/*
|
|
* XXX - do we need to do anything with the authentication level
|
|
* we get back from this?
|
|
*/
|
|
dissect_dcerpc_cn_auth (tvb, pinfo, dcerpc_tree, hdr, NULL);
|
|
|
|
if (check_col (pinfo->cinfo, COL_INFO)) {
|
|
if (num_results != 0 && result == 0) {
|
|
col_add_fstr (pinfo->cinfo, COL_INFO, "%s ack: accept max_xmit: %d max_recv: %d",
|
|
hdr->ptype == PDU_BIND_ACK ? "Bind" : "Alter ctx",
|
|
max_xmit, max_recv);
|
|
} else {
|
|
/* FIXME: should put in reason */
|
|
col_add_fstr (pinfo->cinfo, COL_INFO, "%s ack: %s",
|
|
hdr->ptype == PDU_BIND_ACK ? "Bind" : "Alter ctx",
|
|
result == 1 ? "User reject" :
|
|
result == 2 ? "Provider reject" :
|
|
"Unknown");
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_cn_rqst (tvbuff_t *tvb, 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_uuid_t obj_id;
|
|
int auth_sz = 0;
|
|
int auth_level;
|
|
int offset = 16;
|
|
guint32 alloc_hint;
|
|
|
|
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_uint16 (tvb, offset, pinfo, dcerpc_tree, hdr->drep,
|
|
hf_dcerpc_opnum, &opnum);
|
|
|
|
if (check_col (pinfo->cinfo, COL_INFO)) {
|
|
col_add_fstr (pinfo->cinfo, COL_INFO, "Request: opnum: %d ctx_id:%d",
|
|
opnum, ctx_id);
|
|
}
|
|
|
|
if (hdr->flags & 0x80) {
|
|
dcerpc_tvb_get_uuid (tvb, offset, hdr->drep, &obj_id);
|
|
if (dcerpc_tree) {
|
|
proto_tree_add_string_format (dcerpc_tree, hf_dcerpc_obj_id, tvb,
|
|
offset, 16, "HMMM",
|
|
"Object UUID: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
|
|
obj_id.Data1, obj_id.Data2, obj_id.Data3,
|
|
obj_id.Data4[0],
|
|
obj_id.Data4[1],
|
|
obj_id.Data4[2],
|
|
obj_id.Data4[3],
|
|
obj_id.Data4[4],
|
|
obj_id.Data4[5],
|
|
obj_id.Data4[6],
|
|
obj_id.Data4[7]);
|
|
}
|
|
offset += 16;
|
|
}
|
|
|
|
/*
|
|
* XXX - what if this was set when the connection was set up,
|
|
* and we just have a security context?
|
|
*/
|
|
auth_sz = dissect_dcerpc_cn_auth (tvb, pinfo, dcerpc_tree, hdr,
|
|
&auth_level);
|
|
|
|
conv = find_conversation (&pinfo->src, &pinfo->dst, pinfo->ptype,
|
|
pinfo->srcport, pinfo->destport, 0);
|
|
if (!conv) {
|
|
|
|
} else {
|
|
dcerpc_call_value *value;
|
|
int length, reported_length, stub_length;
|
|
dcerpc_info di;
|
|
|
|
/* !!! 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
|
|
*/
|
|
if(!g_hash_table_lookup(dcerpc_matched, (void *)pinfo->fd->num)){
|
|
dcerpc_bind_key bind_key;
|
|
dcerpc_bind_value *bind_value;
|
|
|
|
bind_key.conv=conv;
|
|
bind_key.ctx_id=ctx_id;
|
|
bind_key.smb_fid=get_smb_fid(pinfo->private_data);
|
|
|
|
if((bind_value=g_hash_table_lookup(dcerpc_binds, &bind_key))){
|
|
dcerpc_call_key *call_key;
|
|
dcerpc_call_value *call_value;
|
|
|
|
/* We found the binding so just add the call
|
|
to both the call table and the matched table
|
|
*/
|
|
call_key=g_mem_chunk_alloc (dcerpc_call_key_chunk);
|
|
call_key->conv=conv;
|
|
call_key->call_id=hdr->call_id;
|
|
call_key->smb_fid=get_smb_fid(pinfo->private_data);
|
|
|
|
/* 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_calls, call_key)){
|
|
g_hash_table_remove(dcerpc_calls, call_key);
|
|
}
|
|
|
|
call_value=g_mem_chunk_alloc (dcerpc_call_value_chunk);
|
|
call_value->uuid = bind_value->uuid;
|
|
call_value->ver = bind_value->ver;
|
|
call_value->opnum = opnum;
|
|
call_value->req_frame=pinfo->fd->num;
|
|
call_value->rep_frame=0;
|
|
call_value->max_ptr=0;
|
|
call_value->private_data = NULL;
|
|
g_hash_table_insert (dcerpc_calls, call_key, call_value);
|
|
|
|
g_hash_table_insert (dcerpc_matched, (void *)pinfo->fd->num, call_value);
|
|
}
|
|
}
|
|
|
|
value=g_hash_table_lookup (dcerpc_matched, (void *)pinfo->fd->num);
|
|
|
|
|
|
if (value) {
|
|
|
|
/* handoff this call */
|
|
length = tvb_length_remaining(tvb, offset);
|
|
reported_length = tvb_reported_length_remaining(tvb, offset);
|
|
stub_length = hdr->frag_len - offset - auth_sz;
|
|
if (length > stub_length)
|
|
length = stub_length;
|
|
if (reported_length > stub_length)
|
|
reported_length = stub_length;
|
|
di.conv = conv;
|
|
di.call_id = hdr->call_id;
|
|
di.smb_fid = get_smb_fid(pinfo->private_data);
|
|
di.request = TRUE;
|
|
di.call_data = value;
|
|
|
|
if(value->rep_frame!=0){
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_response_in,
|
|
tvb, 0, 0, value->rep_frame);
|
|
}
|
|
|
|
/* If we dont have reassembly enabled, or this packet contains the
|
|
entire PDU, just call the handoff directly */
|
|
if( (!dcerpc_reassemble)
|
|
|| ((hdr->flags&0x03)==0x03) ){
|
|
if(hdr->flags&0x01){
|
|
dcerpc_try_handoff (pinfo, tree, dcerpc_tree,
|
|
tvb_new_subset (tvb, offset, length,
|
|
reported_length),
|
|
0, opnum, TRUE, hdr->drep, &di, auth_level);
|
|
} else {
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "[DCE/RPC fragment]");
|
|
}
|
|
}
|
|
} else if(dcerpc_reassemble){
|
|
/*OK we need to do reassembly */
|
|
/* handle first fragment */
|
|
if((hdr->flags&0x03)==0x01){ /* FIRST fragment */
|
|
if( (!pinfo->fd->flags.visited) && value->req_frame ){
|
|
fragment_add(tvb, offset, pinfo, value->req_frame,
|
|
dcerpc_reassemble_table,
|
|
0,
|
|
length,
|
|
TRUE);
|
|
fragment_set_tot_len(pinfo, value->req_frame,
|
|
dcerpc_reassemble_table, alloc_hint);
|
|
}
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "[DCE/RPC fragment]");
|
|
}
|
|
}
|
|
if((hdr->flags&0x03)==0x00){ /* MIDDLE fragment(s) */
|
|
if( (!pinfo->fd->flags.visited) && value->req_frame ){
|
|
guint32 tot_len;
|
|
tot_len = fragment_get_tot_len(pinfo, value->req_frame,
|
|
dcerpc_reassemble_table);
|
|
fragment_add(tvb, offset, pinfo, value->req_frame,
|
|
dcerpc_reassemble_table,
|
|
tot_len-alloc_hint,
|
|
length,
|
|
TRUE);
|
|
}
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "[DCE/RPC fragment]");
|
|
}
|
|
}
|
|
if((hdr->flags&0x03)==0x02){ /* LAST fragment */
|
|
if( value->req_frame ){
|
|
fragment_data *ipfd_head;
|
|
guint32 tot_len;
|
|
tot_len = fragment_get_tot_len(pinfo, value->req_frame,
|
|
dcerpc_reassemble_table);
|
|
ipfd_head = fragment_add(tvb, offset, pinfo,
|
|
value->req_frame,
|
|
dcerpc_reassemble_table,
|
|
tot_len-alloc_hint,
|
|
length,
|
|
TRUE);
|
|
|
|
if(ipfd_head){
|
|
fragment_data *ipfd;
|
|
proto_tree *ft=NULL;
|
|
proto_item *fi=NULL;
|
|
tvbuff_t *next_tvb;
|
|
|
|
next_tvb = tvb_new_real_data(ipfd_head->data, ipfd_head->datalen, ipfd_head->datalen);
|
|
tvb_set_child_real_data_tvbuff(tvb, next_tvb);
|
|
add_new_data_source(pinfo->fd, next_tvb, "Reassembled DCE/RPC");
|
|
pinfo->fragmented=FALSE;
|
|
fi = proto_tree_add_item(dcerpc_tree, hf_dcerpc_fragments, next_tvb, 0, -1, FALSE);
|
|
ft = proto_item_add_subtree(fi, ett_dcerpc_fragments);
|
|
for (ipfd=ipfd_head->next; ipfd; ipfd=ipfd->next){
|
|
if (ipfd->flags & (FD_OVERLAP|FD_OVERLAPCONFLICT|FD_MULTIPLETAILS|FD_TOOLONGFRAGMENT) ) {
|
|
proto_tree *fet=NULL;
|
|
proto_item *fei=NULL;
|
|
int hf;
|
|
|
|
if (ipfd->flags & (FD_OVERLAPCONFLICT|FD_MULTIPLETAILS|FD_TOOLONGFRAGMENT) ) {
|
|
hf = hf_dcerpc_fragment_error;
|
|
} else {
|
|
hf = hf_dcerpc_fragment;
|
|
}
|
|
fei = proto_tree_add_none_format(ft, hf,
|
|
next_tvb, ipfd->offset, ipfd->len,
|
|
"Frame:%u payload:%u-%u",
|
|
ipfd->frame,
|
|
ipfd->offset,
|
|
ipfd->offset+ipfd->len-1);
|
|
fet = proto_item_add_subtree(fei, ett_dcerpc_fragment);
|
|
if (ipfd->flags&FD_OVERLAP) {
|
|
proto_tree_add_boolean(fet, hf_dcerpc_fragment_overlap, next_tvb, 0, 0, TRUE);
|
|
}
|
|
if (ipfd->flags&FD_OVERLAPCONFLICT) {
|
|
proto_tree_add_boolean(fet, hf_dcerpc_fragment_overlap_conflict, next_tvb, 0, 0, TRUE);
|
|
}
|
|
if (ipfd->flags&FD_MULTIPLETAILS) {
|
|
proto_tree_add_boolean(fet, hf_dcerpc_fragment_multiple_tails, next_tvb, 0, 0, TRUE);
|
|
}
|
|
if (ipfd->flags&FD_TOOLONGFRAGMENT) {
|
|
proto_tree_add_boolean(fet, hf_dcerpc_fragment_too_long_fragment, next_tvb, 0, 0, TRUE);
|
|
}
|
|
} else {
|
|
proto_tree_add_none_format(ft, hf_dcerpc_fragment,
|
|
next_tvb, ipfd->offset, ipfd->len,
|
|
"Frame:%u payload:%u-%u",
|
|
ipfd->frame,
|
|
ipfd->offset,
|
|
ipfd->offset+ipfd->len-1
|
|
);
|
|
}
|
|
}
|
|
if (ipfd_head->flags & (FD_OVERLAPCONFLICT|FD_MULTIPLETAILS|FD_TOOLONGFRAGMENT) ) {
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_set_str(pinfo->cinfo, COL_INFO, "[Illegal fragments]");
|
|
}
|
|
}
|
|
dcerpc_try_handoff (pinfo, tree, dcerpc_tree,
|
|
next_tvb,
|
|
0, opnum, TRUE, hdr->drep, &di,
|
|
auth_level);
|
|
} else {
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "[DCE/RPC fragment]");
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_cn_resp (tvbuff_t *tvb, 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;
|
|
int auth_sz = 0;
|
|
int offset = 16;
|
|
int auth_level;
|
|
guint32 alloc_hint;
|
|
|
|
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);
|
|
|
|
if (check_col (pinfo->cinfo, COL_INFO)) {
|
|
col_add_fstr (pinfo->cinfo, COL_INFO, "Response: call_id: %d ctx_id:%d",
|
|
hdr->call_id, 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?
|
|
*/
|
|
auth_sz = dissect_dcerpc_cn_auth (tvb, pinfo, dcerpc_tree, hdr,
|
|
&auth_level);
|
|
|
|
conv = find_conversation (&pinfo->src, &pinfo->dst, pinfo->ptype,
|
|
pinfo->srcport, pinfo->destport, 0);
|
|
if (!conv) {
|
|
/* no point in creating one here, really */
|
|
} else {
|
|
|
|
/* !!! 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
|
|
*/
|
|
if(!g_hash_table_lookup(dcerpc_matched, (void *)pinfo->fd->num)){
|
|
dcerpc_call_key call_key;
|
|
dcerpc_call_value *call_value;
|
|
|
|
call_key.conv=conv;
|
|
call_key.call_id=hdr->call_id;
|
|
call_key.smb_fid=get_smb_fid(pinfo->private_data);
|
|
|
|
if((call_value=g_hash_table_lookup(dcerpc_calls, &call_key))){
|
|
g_hash_table_insert (dcerpc_matched, (void *)pinfo->fd->num, call_value);
|
|
if(call_value->rep_frame==0){
|
|
call_value->rep_frame=pinfo->fd->num;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
value=g_hash_table_lookup(dcerpc_matched, (void *)pinfo->fd->num);
|
|
|
|
if (value) {
|
|
int length, reported_length, stub_length;
|
|
dcerpc_info di;
|
|
|
|
/* handoff this call */
|
|
length = tvb_length_remaining(tvb, offset);
|
|
reported_length = tvb_reported_length_remaining(tvb, offset);
|
|
stub_length = hdr->frag_len - offset - auth_sz;
|
|
if (length > stub_length)
|
|
length = stub_length;
|
|
if (reported_length > stub_length)
|
|
reported_length = stub_length;
|
|
di.conv = conv;
|
|
di.call_id = hdr->call_id;
|
|
di.smb_fid = get_smb_fid(pinfo->private_data);
|
|
di.request = FALSE;
|
|
di.call_data = value;
|
|
|
|
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_opnum, tvb, 0, 0, value->opnum);
|
|
if(value->req_frame!=0){
|
|
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_request_in,
|
|
tvb, 0, 0, value->req_frame);
|
|
}
|
|
|
|
/* If we dont have reassembly enabled, or this packet contains the
|
|
entire PDU, just call the handoff directly */
|
|
if( (!dcerpc_reassemble)
|
|
|| ((hdr->flags&0x03)==0x03) ){
|
|
if(hdr->flags&0x01){
|
|
dcerpc_try_handoff (pinfo, tree, dcerpc_tree,
|
|
tvb_new_subset (tvb, offset, length,
|
|
reported_length),
|
|
0, value->opnum, FALSE, hdr->drep, &di,
|
|
auth_level);
|
|
} else {
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "[DCE/RPC fragment]");
|
|
}
|
|
}
|
|
} else if(dcerpc_reassemble){
|
|
/*OK we need to do reassembly */
|
|
/* handle first fragment */
|
|
if((hdr->flags&0x03)==0x01){ /* FIRST fragment */
|
|
if( (!pinfo->fd->flags.visited) && value->rep_frame ){
|
|
fragment_add(tvb, offset, pinfo, value->rep_frame,
|
|
dcerpc_reassemble_table,
|
|
0,
|
|
length,
|
|
TRUE);
|
|
fragment_set_tot_len(pinfo, value->rep_frame,
|
|
dcerpc_reassemble_table, alloc_hint);
|
|
}
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "[DCE/RPC fragment]");
|
|
}
|
|
}
|
|
if((hdr->flags&0x03)==0x00){ /* MIDDLE fragment(s) */
|
|
if( (!pinfo->fd->flags.visited) && value->rep_frame ){
|
|
guint32 tot_len;
|
|
tot_len = fragment_get_tot_len(pinfo, value->rep_frame,
|
|
dcerpc_reassemble_table);
|
|
fragment_add(tvb, offset, pinfo, value->rep_frame,
|
|
dcerpc_reassemble_table,
|
|
tot_len-alloc_hint,
|
|
length,
|
|
TRUE);
|
|
}
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "[DCE/RPC fragment]");
|
|
}
|
|
}
|
|
if((hdr->flags&0x03)==0x02){ /* LAST fragment */
|
|
if( value->rep_frame ){
|
|
fragment_data *ipfd_head;
|
|
guint32 tot_len;
|
|
tot_len = fragment_get_tot_len(pinfo, value->rep_frame,
|
|
dcerpc_reassemble_table);
|
|
ipfd_head = fragment_add(tvb, offset, pinfo,
|
|
value->rep_frame,
|
|
dcerpc_reassemble_table,
|
|
tot_len-alloc_hint,
|
|
length,
|
|
TRUE);
|
|
|
|
if(ipfd_head){
|
|
fragment_data *ipfd;
|
|
proto_tree *ft=NULL;
|
|
proto_item *fi=NULL;
|
|
tvbuff_t *next_tvb;
|
|
|
|
next_tvb = tvb_new_real_data(ipfd_head->data, ipfd_head->datalen, ipfd_head->datalen);
|
|
tvb_set_child_real_data_tvbuff(tvb, next_tvb);
|
|
add_new_data_source(pinfo->fd, next_tvb, "Reassembled DCE/RPC");
|
|
pinfo->fragmented=FALSE;
|
|
fi = proto_tree_add_item(dcerpc_tree, hf_dcerpc_fragments, next_tvb, 0, -1, FALSE);
|
|
ft = proto_item_add_subtree(fi, ett_dcerpc_fragments);
|
|
for (ipfd=ipfd_head->next; ipfd; ipfd=ipfd->next){
|
|
if (ipfd->flags & (FD_OVERLAP|FD_OVERLAPCONFLICT|FD_MULTIPLETAILS|FD_TOOLONGFRAGMENT) ) {
|
|
proto_tree *fet=NULL;
|
|
proto_item *fei=NULL;
|
|
int hf;
|
|
|
|
if (ipfd->flags & (FD_OVERLAPCONFLICT|FD_MULTIPLETAILS|FD_TOOLONGFRAGMENT) ) {
|
|
hf = hf_dcerpc_fragment_error;
|
|
} else {
|
|
hf = hf_dcerpc_fragment;
|
|
}
|
|
fei = proto_tree_add_none_format(ft, hf,
|
|
next_tvb, ipfd->offset, ipfd->len,
|
|
"Frame:%u payload:%u-%u",
|
|
ipfd->frame,
|
|
ipfd->offset,
|
|
ipfd->offset+ipfd->len-1);
|
|
fet = proto_item_add_subtree(fei, ett_dcerpc_fragment);
|
|
if (ipfd->flags&FD_OVERLAP) {
|
|
proto_tree_add_boolean(fet, hf_dcerpc_fragment_overlap, next_tvb, 0, 0, TRUE);
|
|
}
|
|
if (ipfd->flags&FD_OVERLAPCONFLICT) {
|
|
proto_tree_add_boolean(fet, hf_dcerpc_fragment_overlap_conflict, next_tvb, 0, 0, TRUE);
|
|
}
|
|
if (ipfd->flags&FD_MULTIPLETAILS) {
|
|
proto_tree_add_boolean(fet, hf_dcerpc_fragment_multiple_tails, next_tvb, 0, 0, TRUE);
|
|
}
|
|
if (ipfd->flags&FD_TOOLONGFRAGMENT) {
|
|
proto_tree_add_boolean(fet, hf_dcerpc_fragment_too_long_fragment, next_tvb, 0, 0, TRUE);
|
|
}
|
|
} else {
|
|
proto_tree_add_none_format(ft, hf_dcerpc_fragment,
|
|
next_tvb, ipfd->offset, ipfd->len,
|
|
"Frame:%u payload:%u-%u",
|
|
ipfd->frame,
|
|
ipfd->offset,
|
|
ipfd->offset+ipfd->len-1
|
|
);
|
|
}
|
|
}
|
|
if (ipfd_head->flags & (FD_OVERLAPCONFLICT|FD_MULTIPLETAILS|FD_TOOLONGFRAGMENT) ) {
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_set_str(pinfo->cinfo, COL_INFO, "[Illegal fragments]");
|
|
}
|
|
}
|
|
dcerpc_try_handoff (pinfo, tree, dcerpc_tree,
|
|
next_tvb,
|
|
0, value->opnum, FALSE, hdr->drep, &di,
|
|
auth_level);
|
|
} else {
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "[DCE/RPC fragment]");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* DCERPC dissector for connection oriented calls
|
|
*/
|
|
static int
|
|
dissect_dcerpc_cn (tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *tree, gboolean can_desegment)
|
|
{
|
|
static char nulls[4] = { 0 };
|
|
int start_offset;
|
|
int padding = 0;
|
|
proto_item *ti = NULL;
|
|
proto_item *tf = NULL;
|
|
proto_tree *dcerpc_tree = NULL;
|
|
proto_tree *cn_flags_tree = NULL;
|
|
proto_tree *drep_tree = NULL;
|
|
e_dce_cn_common_hdr_t hdr;
|
|
|
|
/*
|
|
* 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_bytes_exist (tvb, offset, 4) &&
|
|
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 (!tvb_bytes_exist (tvb, offset, sizeof (hdr))) {
|
|
return -1;
|
|
}
|
|
start_offset = offset;
|
|
hdr.rpc_ver = tvb_get_guint8 (tvb, offset++);
|
|
if (hdr.rpc_ver != 5)
|
|
return -1;
|
|
hdr.rpc_ver_minor = tvb_get_guint8 (tvb, offset++);
|
|
if (hdr.rpc_ver_minor != 0 && hdr.rpc_ver_minor != 1)
|
|
return -1;
|
|
hdr.ptype = tvb_get_guint8 (tvb, offset++);
|
|
if (hdr.ptype > 19)
|
|
return -1;
|
|
|
|
if (check_col (pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str (pinfo->cinfo, COL_PROTOCOL, "DCERPC");
|
|
if (check_col (pinfo->cinfo, COL_INFO))
|
|
col_set_str (pinfo->cinfo, COL_INFO, pckt_vals[hdr.ptype].strptr);
|
|
|
|
hdr.flags = tvb_get_guint8 (tvb, offset++);
|
|
tvb_memcpy (tvb, (guint8 *)hdr.drep, offset, sizeof (hdr.drep));
|
|
offset += 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;
|
|
|
|
offset = start_offset;
|
|
if (can_desegment && pinfo->can_desegment
|
|
&& hdr.frag_len > tvb_length_remaining (tvb, offset)) {
|
|
pinfo->desegment_offset = offset;
|
|
pinfo->desegment_len = hdr.frag_len - tvb_length_remaining (tvb, offset);
|
|
return 0; /* desegmentation required */
|
|
}
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item (tree, proto_dcerpc, tvb, offset, hdr.frag_len, FALSE);
|
|
if (ti) {
|
|
dcerpc_tree = proto_item_add_subtree (ti, ett_dcerpc);
|
|
}
|
|
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_ver, tvb, offset++, 1, hdr.rpc_ver);
|
|
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_ver_minor, tvb, offset++, 1, hdr.rpc_ver_minor);
|
|
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_packet_type, tvb, offset++, 1, hdr.ptype);
|
|
tf = proto_tree_add_uint (dcerpc_tree, hf_dcerpc_cn_flags, tvb, offset, 1, hdr.flags);
|
|
cn_flags_tree = proto_item_add_subtree (tf, ett_dcerpc_cn_flags);
|
|
if (cn_flags_tree) {
|
|
proto_tree_add_boolean (cn_flags_tree, hf_dcerpc_cn_flags_first_frag, tvb, offset, 1, hdr.flags);
|
|
proto_tree_add_boolean (cn_flags_tree, hf_dcerpc_cn_flags_last_frag, tvb, offset, 1, hdr.flags);
|
|
proto_tree_add_boolean (cn_flags_tree, hf_dcerpc_cn_flags_cancel_pending, tvb, offset, 1, hdr.flags);
|
|
proto_tree_add_boolean (cn_flags_tree, hf_dcerpc_cn_flags_reserved, tvb, offset, 1, hdr.flags);
|
|
proto_tree_add_boolean (cn_flags_tree, hf_dcerpc_cn_flags_mpx, tvb, offset, 1, hdr.flags);
|
|
proto_tree_add_boolean (cn_flags_tree, hf_dcerpc_cn_flags_dne, tvb, offset, 1, hdr.flags);
|
|
proto_tree_add_boolean (cn_flags_tree, hf_dcerpc_cn_flags_maybe, tvb, offset, 1, hdr.flags);
|
|
proto_tree_add_boolean (cn_flags_tree, hf_dcerpc_cn_flags_object, tvb, offset, 1, hdr.flags);
|
|
}
|
|
offset++;
|
|
|
|
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);
|
|
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]);
|
|
}
|
|
offset += 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;
|
|
}
|
|
|
|
|
|
/*
|
|
* Packet type specific stuff is next.
|
|
*/
|
|
switch (hdr.ptype) {
|
|
case PDU_BIND:
|
|
case PDU_ALTER:
|
|
dissect_dcerpc_cn_bind (tvb, pinfo, dcerpc_tree, &hdr);
|
|
break;
|
|
|
|
case PDU_BIND_ACK:
|
|
case PDU_ALTER_ACK:
|
|
dissect_dcerpc_cn_bind_ack (tvb, pinfo, dcerpc_tree, &hdr);
|
|
break;
|
|
|
|
case PDU_REQ:
|
|
dissect_dcerpc_cn_rqst (tvb, pinfo, dcerpc_tree, tree, &hdr);
|
|
break;
|
|
|
|
case PDU_RESP:
|
|
dissect_dcerpc_cn_resp (tvb, pinfo, dcerpc_tree, tree, &hdr);
|
|
break;
|
|
|
|
default:
|
|
/* might as well dissect the auth info */
|
|
dissect_dcerpc_cn_auth (tvb, pinfo, dcerpc_tree, &hdr, NULL);
|
|
break;
|
|
}
|
|
return hdr.frag_len + padding;
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
/*
|
|
* Only one PDU per transport packet, and only one transport
|
|
* packet per PDU.
|
|
*/
|
|
if (dissect_dcerpc_cn (tvb, 0, pinfo, tree, FALSE) == -1) {
|
|
/*
|
|
* It wasn't a DCERPC PDU.
|
|
*/
|
|
return FALSE;
|
|
} else {
|
|
/*
|
|
* It was.
|
|
*/
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* DCERPC dissector for connection oriented calls over byte-stream
|
|
* transports
|
|
*/
|
|
static gboolean
|
|
dissect_dcerpc_cn_bs (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
int offset = 0;
|
|
int pdu_len;
|
|
gboolean ret = FALSE;
|
|
|
|
/*
|
|
* There may be multiple PDUs per transport packet; keep
|
|
* processing them.
|
|
*/
|
|
while (tvb_reported_length_remaining(tvb, offset) != 0) {
|
|
pdu_len = dissect_dcerpc_cn (tvb, offset, pinfo, tree,
|
|
dcerpc_cn_desegment);
|
|
if (pdu_len == -1) {
|
|
/*
|
|
* Not a DCERPC PDU.
|
|
*/
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Well, we've seen at least one DCERPC PDU.
|
|
*/
|
|
ret = TRUE;
|
|
|
|
if (pdu_len == 0) {
|
|
/*
|
|
* Desegmentation required - bail now.
|
|
*/
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Step to the next PDU.
|
|
*/
|
|
offset += pdu_len;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
dissect_dcerpc_dg_auth (tvbuff_t *tvb, proto_tree *dcerpc_tree,
|
|
e_dce_dg_common_hdr_t *hdr, int *auth_level_p)
|
|
{
|
|
int offset;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
if (tvb_length (tvb) >= hdr->frag_len) {
|
|
offset = hdr->frag_len;
|
|
|
|
proto_tree_add_text (dcerpc_tree, tvb, offset, -1, "Auth data");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* DCERPC dissector for connectionless calls
|
|
*/
|
|
static gboolean
|
|
dissect_dcerpc_dg (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
proto_item *ti = NULL;
|
|
proto_item *tf = NULL;
|
|
proto_tree *dcerpc_tree = NULL;
|
|
proto_tree *dg_flags1_tree = NULL;
|
|
proto_tree *dg_flags2_tree = NULL;
|
|
proto_tree *drep_tree = NULL;
|
|
e_dce_dg_common_hdr_t hdr;
|
|
int offset = 0;
|
|
conversation_t *conv;
|
|
|
|
/*
|
|
* 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_bytes_exist (tvb, 0, sizeof (hdr))) {
|
|
return FALSE;
|
|
}
|
|
hdr.rpc_ver = tvb_get_guint8 (tvb, offset++);
|
|
if (hdr.rpc_ver != 4)
|
|
return FALSE;
|
|
hdr.ptype = tvb_get_guint8 (tvb, offset++);
|
|
if (hdr.ptype > 19)
|
|
return FALSE;
|
|
|
|
if (check_col (pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str (pinfo->cinfo, COL_PROTOCOL, "DCERPC");
|
|
if (check_col (pinfo->cinfo, COL_INFO))
|
|
col_set_str (pinfo->cinfo, COL_INFO, pckt_vals[hdr.ptype].strptr);
|
|
|
|
hdr.flags1 = tvb_get_guint8 (tvb, offset++);
|
|
hdr.flags2 = tvb_get_guint8 (tvb, offset++);
|
|
tvb_memcpy (tvb, (guint8 *)hdr.drep, offset, sizeof (hdr.drep));
|
|
offset += 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, FALSE);
|
|
if (ti) {
|
|
dcerpc_tree = proto_item_add_subtree(ti, ett_dcerpc);
|
|
}
|
|
offset = 0;
|
|
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_ver, tvb, offset++, 1, hdr.rpc_ver);
|
|
|
|
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_packet_type, tvb, offset++, 1, hdr.ptype);
|
|
|
|
tf = proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_flags1, tvb, offset, 1, hdr.flags1);
|
|
dg_flags1_tree = proto_item_add_subtree (tf, ett_dcerpc_dg_flags1);
|
|
if (dg_flags1_tree) {
|
|
proto_tree_add_boolean (dg_flags1_tree, hf_dcerpc_dg_flags1_rsrvd_01, tvb, offset, 1, hdr.flags1);
|
|
proto_tree_add_boolean (dg_flags1_tree, hf_dcerpc_dg_flags1_last_frag, tvb, offset, 1, hdr.flags1);
|
|
proto_tree_add_boolean (dg_flags1_tree, hf_dcerpc_dg_flags1_frag, tvb, offset, 1, hdr.flags1);
|
|
proto_tree_add_boolean (dg_flags1_tree, hf_dcerpc_dg_flags1_nofack, tvb, offset, 1, hdr.flags1);
|
|
proto_tree_add_boolean (dg_flags1_tree, hf_dcerpc_dg_flags1_maybe, tvb, offset, 1, hdr.flags1);
|
|
proto_tree_add_boolean (dg_flags1_tree, hf_dcerpc_dg_flags1_idempotent, tvb, offset, 1, hdr.flags1);
|
|
proto_tree_add_boolean (dg_flags1_tree, hf_dcerpc_dg_flags1_broadcast, tvb, offset, 1, hdr.flags1);
|
|
proto_tree_add_boolean (dg_flags1_tree, hf_dcerpc_dg_flags1_rsrvd_80, tvb, offset, 1, hdr.flags1);
|
|
}
|
|
offset++;
|
|
|
|
tf = proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_flags2, tvb, offset, 1, hdr.flags2);
|
|
dg_flags2_tree = proto_item_add_subtree (tf, ett_dcerpc_dg_flags2);
|
|
if (dg_flags2_tree) {
|
|
proto_tree_add_boolean (dg_flags2_tree, hf_dcerpc_dg_flags2_rsrvd_01, tvb, offset, 1, hdr.flags2);
|
|
proto_tree_add_boolean (dg_flags2_tree, hf_dcerpc_dg_flags2_cancel_pending, tvb, offset, 1, hdr.flags2);
|
|
proto_tree_add_boolean (dg_flags2_tree, hf_dcerpc_dg_flags2_rsrvd_04, tvb, offset, 1, hdr.flags2);
|
|
proto_tree_add_boolean (dg_flags2_tree, hf_dcerpc_dg_flags2_rsrvd_08, tvb, offset, 1, hdr.flags2);
|
|
proto_tree_add_boolean (dg_flags2_tree, hf_dcerpc_dg_flags2_rsrvd_10, tvb, offset, 1, hdr.flags2);
|
|
proto_tree_add_boolean (dg_flags2_tree, hf_dcerpc_dg_flags2_rsrvd_20, tvb, offset, 1, hdr.flags2);
|
|
proto_tree_add_boolean (dg_flags2_tree, hf_dcerpc_dg_flags2_rsrvd_40, tvb, offset, 1, hdr.flags2);
|
|
proto_tree_add_boolean (dg_flags2_tree, hf_dcerpc_dg_flags2_rsrvd_80, tvb, offset, 1, hdr.flags2);
|
|
}
|
|
offset++;
|
|
|
|
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]);
|
|
}
|
|
offset += sizeof (hdr.drep);
|
|
|
|
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_serial_hi, tvb, offset++, 1, hdr.serial_hi);
|
|
|
|
proto_tree_add_string_format (dcerpc_tree, hf_dcerpc_obj_id, tvb,
|
|
offset, 16, "HMMM",
|
|
"Object: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
|
|
hdr.obj_id.Data1, hdr.obj_id.Data2, hdr.obj_id.Data3,
|
|
hdr.obj_id.Data4[0],
|
|
hdr.obj_id.Data4[1],
|
|
hdr.obj_id.Data4[2],
|
|
hdr.obj_id.Data4[3],
|
|
hdr.obj_id.Data4[4],
|
|
hdr.obj_id.Data4[5],
|
|
hdr.obj_id.Data4[6],
|
|
hdr.obj_id.Data4[7]);
|
|
offset += 16;
|
|
|
|
proto_tree_add_string_format (dcerpc_tree, hf_dcerpc_dg_if_id, tvb,
|
|
offset, 16, "HMMM",
|
|
"Interface: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
|
|
hdr.if_id.Data1, hdr.if_id.Data2, hdr.if_id.Data3,
|
|
hdr.if_id.Data4[0],
|
|
hdr.if_id.Data4[1],
|
|
hdr.if_id.Data4[2],
|
|
hdr.if_id.Data4[3],
|
|
hdr.if_id.Data4[4],
|
|
hdr.if_id.Data4[5],
|
|
hdr.if_id.Data4[6],
|
|
hdr.if_id.Data4[7]);
|
|
offset += 16;
|
|
|
|
proto_tree_add_string_format (dcerpc_tree, hf_dcerpc_dg_act_id, tvb,
|
|
offset, 16, "HMMM",
|
|
"Activity: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
|
|
hdr.act_id.Data1, hdr.act_id.Data2, hdr.act_id.Data3,
|
|
hdr.act_id.Data4[0],
|
|
hdr.act_id.Data4[1],
|
|
hdr.act_id.Data4[2],
|
|
hdr.act_id.Data4[3],
|
|
hdr.act_id.Data4[4],
|
|
hdr.act_id.Data4[5],
|
|
hdr.act_id.Data4[6],
|
|
hdr.act_id.Data4[7]);
|
|
offset += 16;
|
|
|
|
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_server_boot, tvb, offset, 4, hdr.server_boot);
|
|
offset += 4;
|
|
|
|
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_if_ver, tvb, offset, 4, hdr.if_ver);
|
|
offset += 4;
|
|
|
|
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_seqnum, tvb, offset, 4, hdr.seqnum);
|
|
offset += 4;
|
|
|
|
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_opnum, tvb, offset, 2, hdr.opnum);
|
|
offset += 2;
|
|
|
|
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_ihint, tvb, offset, 2, hdr.ihint);
|
|
offset += 2;
|
|
|
|
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_ahint, tvb, offset, 2, hdr.ahint);
|
|
offset += 2;
|
|
|
|
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_frag_len, tvb, offset, 2, hdr.frag_len);
|
|
offset += 2;
|
|
|
|
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_frag_num, tvb, offset, 2, hdr.frag_num);
|
|
offset += 2;
|
|
|
|
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_auth_proto, tvb, offset, 1, hdr.auth_proto);
|
|
offset++;
|
|
|
|
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_serial_lo, tvb, offset, 1, hdr.serial_lo);
|
|
offset++;
|
|
|
|
/*
|
|
* XXX - for Kerberos, we can 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, dcerpc_tree, &hdr, NULL);
|
|
}
|
|
/*
|
|
* 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_conversation (&pinfo->src, &pinfo->dst, pinfo->ptype,
|
|
pinfo->srcport, pinfo->destport, 0);
|
|
if (!conv) {
|
|
conv = conversation_new (&pinfo->src, &pinfo->dst, pinfo->ptype,
|
|
pinfo->srcport, pinfo->destport, 0);
|
|
}
|
|
|
|
/*
|
|
* Packet type specific stuff is next.
|
|
*/
|
|
|
|
switch (hdr.ptype) {
|
|
int length, reported_length, stub_length;
|
|
dcerpc_info di;
|
|
dcerpc_call_value *value, v;
|
|
|
|
case PDU_REQ:
|
|
|
|
if(!(pinfo->fd->flags.visited)){
|
|
dcerpc_call_value *call_value;
|
|
dcerpc_call_key *call_key;
|
|
|
|
call_key=g_mem_chunk_alloc (dcerpc_call_key_chunk);
|
|
call_key->conv=conv;
|
|
call_key->call_id=hdr.seqnum;
|
|
call_key->smb_fid=get_smb_fid(pinfo->private_data);
|
|
|
|
call_value=g_mem_chunk_alloc (dcerpc_call_value_chunk);
|
|
call_value->uuid = hdr.if_id;
|
|
call_value->ver = hdr.if_ver;
|
|
call_value->opnum = hdr.opnum;
|
|
call_value->req_frame=pinfo->fd->num;
|
|
call_value->rep_frame=0;
|
|
call_value->max_ptr=0;
|
|
call_value->private_data = NULL;
|
|
g_hash_table_insert (dcerpc_calls, call_key, call_value);
|
|
|
|
g_hash_table_insert (dcerpc_matched, (void *)pinfo->fd->num, call_value);
|
|
}
|
|
|
|
value=g_hash_table_lookup(dcerpc_matched, (void *)pinfo->fd->num);
|
|
if (!value) {
|
|
v.uuid = hdr.if_id;
|
|
v.ver = hdr.if_ver;
|
|
v.opnum = hdr.opnum;
|
|
v.req_frame = pinfo->fd->num;
|
|
v.rep_frame = 0;
|
|
v.max_ptr = 0;
|
|
v.private_data=NULL;
|
|
value = &v;
|
|
}
|
|
|
|
length = tvb_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;
|
|
|
|
di.conv = conv;
|
|
di.call_id = hdr.seqnum;
|
|
di.smb_fid = -1;
|
|
di.request = TRUE;
|
|
di.call_data = value;
|
|
|
|
/*
|
|
* XXX - authentication level?
|
|
*/
|
|
dcerpc_try_handoff (pinfo, tree, dcerpc_tree,
|
|
tvb_new_subset (tvb, offset, length,
|
|
reported_length),
|
|
0, hdr.opnum, TRUE, hdr.drep, &di, 0);
|
|
break;
|
|
case PDU_RESP:
|
|
if(!(pinfo->fd->flags.visited)){
|
|
dcerpc_call_value *call_value;
|
|
dcerpc_call_key call_key;
|
|
|
|
call_key.conv=conv;
|
|
call_key.call_id=hdr.seqnum;
|
|
call_key.smb_fid=get_smb_fid(pinfo->private_data);
|
|
|
|
if((call_value=g_hash_table_lookup(dcerpc_calls, &call_key))){
|
|
g_hash_table_insert (dcerpc_matched, (void *)pinfo->fd->num, call_value);
|
|
if(call_value->rep_frame==0){
|
|
call_value->rep_frame=pinfo->fd->num;
|
|
}
|
|
}
|
|
}
|
|
|
|
value=g_hash_table_lookup(dcerpc_matched, (void *)pinfo->fd->num);
|
|
if (!value) {
|
|
v.uuid = hdr.if_id;
|
|
v.ver = hdr.if_ver;
|
|
v.opnum = hdr.opnum;
|
|
v.req_frame=0;
|
|
v.rep_frame=pinfo->fd->num;
|
|
v.private_data=NULL;
|
|
value = &v;
|
|
}
|
|
|
|
length = tvb_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;
|
|
|
|
di.conv = conv;
|
|
di.call_id = 0;
|
|
di.smb_fid = -1;
|
|
di.request = FALSE;
|
|
di.call_data = value;
|
|
|
|
/*
|
|
* XXX - authentication level?
|
|
*/
|
|
dcerpc_try_handoff (pinfo, tree, dcerpc_tree,
|
|
tvb_new_subset (tvb, offset, length,
|
|
reported_length),
|
|
0, value->opnum, FALSE, hdr.drep, &di, 0);
|
|
break;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
dcerpc_init_protocol (void)
|
|
{
|
|
/* structures and data for BIND */
|
|
if (dcerpc_binds){
|
|
g_hash_table_destroy (dcerpc_binds);
|
|
}
|
|
dcerpc_binds = g_hash_table_new (dcerpc_bind_hash, dcerpc_bind_equal);
|
|
|
|
if (dcerpc_bind_key_chunk){
|
|
g_mem_chunk_destroy (dcerpc_bind_key_chunk);
|
|
}
|
|
dcerpc_bind_key_chunk = g_mem_chunk_new ("dcerpc_bind_key_chunk",
|
|
sizeof (dcerpc_bind_key),
|
|
200 * sizeof (dcerpc_bind_key),
|
|
G_ALLOC_ONLY);
|
|
if (dcerpc_bind_value_chunk){
|
|
g_mem_chunk_destroy (dcerpc_bind_value_chunk);
|
|
}
|
|
dcerpc_bind_value_chunk = g_mem_chunk_new ("dcerpc_bind_value_chunk",
|
|
sizeof (dcerpc_bind_value),
|
|
200 * sizeof (dcerpc_bind_value),
|
|
G_ALLOC_ONLY);
|
|
/* structures and data for CALL */
|
|
if (dcerpc_calls){
|
|
g_hash_table_destroy (dcerpc_calls);
|
|
}
|
|
dcerpc_calls = g_hash_table_new (dcerpc_call_hash, dcerpc_call_equal);
|
|
if (dcerpc_call_key_chunk){
|
|
g_mem_chunk_destroy (dcerpc_call_key_chunk);
|
|
}
|
|
dcerpc_call_key_chunk = g_mem_chunk_new ("dcerpc_call_key_chunk",
|
|
sizeof (dcerpc_call_key),
|
|
200 * sizeof (dcerpc_call_key),
|
|
G_ALLOC_ONLY);
|
|
if (dcerpc_call_value_chunk){
|
|
g_mem_chunk_destroy (dcerpc_call_value_chunk);
|
|
}
|
|
dcerpc_call_value_chunk = g_mem_chunk_new ("dcerpc_call_value_chunk",
|
|
sizeof (dcerpc_call_value),
|
|
200 * sizeof (dcerpc_call_value),
|
|
G_ALLOC_ONLY);
|
|
|
|
/* structure and data for MATCHED */
|
|
if (dcerpc_matched){
|
|
g_hash_table_destroy (dcerpc_matched);
|
|
}
|
|
dcerpc_matched = g_hash_table_new (dcerpc_matched_hash, dcerpc_matched_equal);
|
|
|
|
}
|
|
|
|
void
|
|
proto_register_dcerpc (void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_dcerpc_request_in,
|
|
{ "Request in", "dcerpc.request_in", FT_UINT32, BASE_DEC,
|
|
NULL, 0, "This packet is a response to the packet in this frame", HFILL }},
|
|
{ &hf_dcerpc_response_in,
|
|
{ "Response in", "dcerpc.response_in", FT_UINT32, BASE_DEC,
|
|
NULL, 0, "The response to this packet is in this packet", HFILL }},
|
|
{ &hf_dcerpc_referent_id,
|
|
{ "Referent ID", "dcerpc.referent_id", FT_UINT32, BASE_HEX,
|
|
NULL, 0, "Referent ID for this NDR encoded pointer", HFILL }},
|
|
{ &hf_dcerpc_ver,
|
|
{ "Version", "dcerpc.ver", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_ver_minor,
|
|
{ "Version (minor)", "dcerpc.ver_minor", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_packet_type,
|
|
{ "Packet type", "dcerpc.pkt_type", FT_UINT8, BASE_HEX, VALS (pckt_vals), 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_flags,
|
|
{ "Packet Flags", "dcerpc.cn_flags", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_flags_first_frag,
|
|
{ "First Frag", "dcerpc.cn_flags.first_frag", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x1, "", HFILL }},
|
|
{ &hf_dcerpc_cn_flags_last_frag,
|
|
{ "Last Frag", "dcerpc.cn_flags.last_frag", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x2, "", HFILL }},
|
|
{ &hf_dcerpc_cn_flags_cancel_pending,
|
|
{ "Cancel Pending", "dcerpc.cn_flags.cancel_pending", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x4, "", HFILL }},
|
|
{ &hf_dcerpc_cn_flags_reserved,
|
|
{ "Reserved", "dcerpc.cn_flags.reserved", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x8, "", HFILL }},
|
|
{ &hf_dcerpc_cn_flags_mpx,
|
|
{ "Multiplex", "dcerpc.cn_flags.mpx", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x10, "", HFILL }},
|
|
{ &hf_dcerpc_cn_flags_dne,
|
|
{ "Did Not Execute", "dcerpc.cn_flags.dne", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x20, "", HFILL }},
|
|
{ &hf_dcerpc_cn_flags_maybe,
|
|
{ "Maybe", "dcerpc.cn_flags.maybe", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x40, "", HFILL }},
|
|
{ &hf_dcerpc_cn_flags_object,
|
|
{ "Object", "dcerpc.cn_flags.object", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x80, "", HFILL }},
|
|
{ &hf_dcerpc_drep,
|
|
{ "Data Representation", "dcerpc.drep", FT_BYTES, BASE_HEX, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_drep_byteorder,
|
|
{ "Byte order", "dcerpc.drep.byteorder", FT_UINT8, BASE_DEC, VALS (drep_byteorder_vals), 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_drep_character,
|
|
{ "Character", "dcerpc.drep.character", FT_UINT8, BASE_DEC, VALS (drep_character_vals), 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_drep_fp,
|
|
{ "Floating-point", "dcerpc.drep.fp", FT_UINT8, BASE_DEC, VALS (drep_fp_vals), 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_frag_len,
|
|
{ "Frag Length", "dcerpc.cn_frag_len", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_auth_len,
|
|
{ "Auth Length", "dcerpc.cn_auth_len", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_call_id,
|
|
{ "Call ID", "dcerpc.cn_call_id", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_max_xmit,
|
|
{ "Max Xmit Frag", "dcerpc.cn_max_xmit", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_max_recv,
|
|
{ "Max Recv Frag", "dcerpc.cn_max_recv", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_assoc_group,
|
|
{ "Assoc Group", "dcerpc.cn_assoc_group", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_num_ctx_items,
|
|
{ "Num Ctx Items", "dcerpc.cn_num_ctx_items", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_ctx_id,
|
|
{ "Context ID", "dcerpc.cn_ctx_id", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_num_trans_items,
|
|
{ "Num Trans Items", "dcerpc.cn_num_trans_items", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_bind_if_id,
|
|
{ "Interface UUID", "dcerpc.cn_bind_to_uuid", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_bind_if_ver,
|
|
{ "Interface Ver", "dcerpc.cn_bind_if_ver", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_bind_if_ver_minor,
|
|
{ "Interface Ver Minor", "dcerpc.cn_bind_if_ver_minor", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_bind_trans_id,
|
|
{ "Transfer Syntax", "dcerpc.cn_bind_trans_id", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_bind_trans_ver,
|
|
{ "Syntax ver", "dcerpc.cn_bind_trans_ver", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_alloc_hint,
|
|
{ "Alloc hint", "dcerpc.cn_alloc_hint", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_sec_addr_len,
|
|
{ "Scndry Addr len", "dcerpc.cn_sec_addr_len", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_sec_addr,
|
|
{ "Scndry Addr", "dcerpc.cn_sec_addr", FT_STRINGZ, BASE_NONE, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_num_results,
|
|
{ "Num results", "dcerpc.cn_num_results", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_ack_result,
|
|
{ "Ack result", "dcerpc.cn_ack_result", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_ack_reason,
|
|
{ "Ack reason", "dcerpc.cn_ack_reason", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_ack_trans_id,
|
|
{ "Transfer Syntax", "dcerpc.cn_ack_trans_id", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_ack_trans_ver,
|
|
{ "Syntax ver", "dcerpc.cn_ack_trans_ver", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_cn_cancel_count,
|
|
{ "Cancel count", "dcerpc.cn_cancel_count", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_auth_type,
|
|
{ "Auth type", "dcerpc.auth_type", FT_UINT8, BASE_DEC, VALS (authn_protocol_vals), 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_auth_level,
|
|
{ "Auth level", "dcerpc.auth_level", FT_UINT8, BASE_DEC, VALS (authn_level_vals), 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_auth_pad_len,
|
|
{ "Auth pad len", "dcerpc.auth_pad_len", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_auth_rsrvd,
|
|
{ "Auth Rsrvd", "dcerpc.auth_rsrvd", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_auth_ctx_id,
|
|
{ "Auth Context ID", "dcerpc.auth_ctx_id", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags1,
|
|
{ "Flags1", "dcerpc.dg_flags1", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags1_rsrvd_01,
|
|
{ "Reserved", "dcerpc.dg_flags1_rsrvd_01", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x01, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags1_last_frag,
|
|
{ "Last Fragment", "dcerpc.dg_flags1_last_frag", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x02, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags1_frag,
|
|
{ "Fragment", "dcerpc.dg_flags1_frag", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x04, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags1_nofack,
|
|
{ "No Fack", "dcerpc.dg_flags1_nofack", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x08, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags1_maybe,
|
|
{ "Maybe", "dcerpc.dg_flags1_maybe", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x10, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags1_idempotent,
|
|
{ "Idempotent", "dcerpc.dg_flags1_idempotent", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x20, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags1_broadcast,
|
|
{ "Broadcast", "dcerpc.dg_flags1_broadcast", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x40, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags1_rsrvd_80,
|
|
{ "Reserved", "dcerpc.dg_flags1_rsrvd_80", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x80, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags2,
|
|
{ "Flags2", "dcerpc.dg_flags2", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags2_rsrvd_01,
|
|
{ "Reserved", "dcerpc.dg_flags2_rsrvd_01", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x01, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags2_cancel_pending,
|
|
{ "Cancel Pending", "dcerpc.dg_flags2_cancel_pending", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x02, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags2_rsrvd_04,
|
|
{ "Reserved", "dcerpc.dg_flags2_rsrvd_04", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x04, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags2_rsrvd_08,
|
|
{ "Reserved", "dcerpc.dg_flags2_rsrvd_08", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x08, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags2_rsrvd_10,
|
|
{ "Reserved", "dcerpc.dg_flags2_rsrvd_10", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x10, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags2_rsrvd_20,
|
|
{ "Reserved", "dcerpc.dg_flags2_rsrvd_20", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x20, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags2_rsrvd_40,
|
|
{ "Reserved", "dcerpc.dg_flags2_rsrvd_40", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x40, "", HFILL }},
|
|
{ &hf_dcerpc_dg_flags2_rsrvd_80,
|
|
{ "Reserved", "dcerpc.dg_flags2_rsrvd_80", FT_BOOLEAN, 8, TFS (&flags_set_truth), 0x80, "", HFILL }},
|
|
{ &hf_dcerpc_dg_serial_lo,
|
|
{ "Serial Low", "dcerpc.dg_serial_lo", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_dg_serial_hi,
|
|
{ "Serial High", "dcerpc.dg_serial_hi", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_dg_ahint,
|
|
{ "Activity Hint", "dcerpc.dg_ahint", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_dg_ihint,
|
|
{ "Interface Hint", "dcerpc.dg_ihint", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_dg_frag_len,
|
|
{ "Fragment len", "dcerpc.dg_frag_len", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_dg_frag_num,
|
|
{ "Fragment num", "dcerpc.dg_frag_num", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_dg_auth_proto,
|
|
{ "Auth proto", "dcerpc.dg_auth_proto", FT_UINT8, BASE_DEC, VALS (authn_protocol_vals), 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_dg_seqnum,
|
|
{ "Sequence num", "dcerpc.dg_seqnum", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_dg_server_boot,
|
|
{ "Server boot time", "dcerpc.dg_server_boot", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_dg_if_ver,
|
|
{ "Interface Ver", "dcerpc.dg_if_ver", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_obj_id,
|
|
{ "Object", "dcerpc.obj_id", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_dg_if_id,
|
|
{ "Interface", "dcerpc.dg_if_id", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_dg_act_id,
|
|
{ "Activitiy", "dcerpc.dg_act_id", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }},
|
|
{ &hf_dcerpc_opnum,
|
|
{ "Opnum", "dcerpc.opnum", FT_UINT16, BASE_DEC, NULL, 0x0, "", 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, "", HFILL }},
|
|
|
|
{ &hf_dcerpc_fragments,
|
|
{ "DCE/RPC Fragments", "dcerpc.fragments", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, "DCE/RPC Fragments", HFILL }},
|
|
|
|
{ &hf_dcerpc_fragment,
|
|
{ "DCE/RPC Fragment", "dcerpc.fragment", FT_NONE, BASE_NONE,
|
|
NULL, 0x0, "DCE/RPC Fragment", 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_NONE, BASE_NONE, NULL, 0x0, "Defragmentation error due to illegal fragments", HFILL }},
|
|
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_dcerpc,
|
|
&ett_dcerpc_cn_flags,
|
|
&ett_dcerpc_drep,
|
|
&ett_dcerpc_dg_flags1,
|
|
&ett_dcerpc_dg_flags2,
|
|
&ett_dcerpc_pointer_data,
|
|
&ett_dcerpc_fragments,
|
|
&ett_dcerpc_fragment,
|
|
};
|
|
module_t *dcerpc_module;
|
|
|
|
proto_dcerpc = proto_register_protocol ("DCE RPC", "DCERPC", "dcerpc");
|
|
proto_register_field_array (proto_dcerpc, hf, array_length (hf));
|
|
proto_register_subtree_array (ett, array_length (ett));
|
|
register_init_routine (dcerpc_init_protocol);
|
|
dcerpc_module = prefs_register_protocol (proto_dcerpc, NULL);
|
|
prefs_register_bool_preference (dcerpc_module,
|
|
"desegment_dcerpc",
|
|
"Desegment all DCE/RPC over TCP",
|
|
"Whether the DCE/RPC dissector should desegment all DCE/RPC over TCP",
|
|
&dcerpc_cn_desegment);
|
|
prefs_register_bool_preference (dcerpc_module,
|
|
"reassemble_dcerpc",
|
|
"Reassemble DCE/RPC fragments",
|
|
"Whether the DCE/RPC dissector should reassemble all fragmented PDUs",
|
|
&dcerpc_reassemble);
|
|
register_init_routine(dcerpc_reassemble_init);
|
|
dcerpc_uuids = g_hash_table_new (dcerpc_uuid_hash, dcerpc_uuid_equal);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_dcerpc (void)
|
|
{
|
|
heur_dissector_add ("tcp", dissect_dcerpc_cn_bs, proto_dcerpc);
|
|
heur_dissector_add ("netbios", dissect_dcerpc_cn_pk, proto_dcerpc);
|
|
heur_dissector_add ("udp", dissect_dcerpc_dg, proto_dcerpc);
|
|
heur_dissector_add ("smb_transact", dissect_dcerpc_cn_bs, proto_dcerpc);
|
|
}
|