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wireshark/packet-dcerpc.c

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/* packet-dcerpc.c
* Routines for DCERPC packet disassembly
* Copyright 2001, Todd Sabin <tas@webspan.net>
*
* $Id: packet-dcerpc.c,v 1.80 2002/10/22 00:59:24 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <ctype.h>
#include <glib.h>
#include <epan/packet.h>
#include "packet-dcerpc.h"
#include <epan/conversation.h>
#include "prefs.h"
#include "reassemble.h"
static const value_string pckt_vals[] = {
{ PDU_REQ, "Request"},
{ PDU_PING, "Ping"},
{ PDU_RESP, "Response"},
{ PDU_FAULT, "Fault"},
{ PDU_WORKING, "Working"},
{ PDU_NOCALL, "Nocall"},
{ PDU_REJECT, "Reject"},
{ PDU_ACK, "Ack"},
{ PDU_CL_CANCEL, "Cl_cancel"},
{ PDU_FACK, "Fack"},
{ PDU_CANCEL_ACK, "Cancel_ack"},
{ PDU_BIND, "Bind"},
{ PDU_BIND_ACK, "Bind_ack"},
{ PDU_BIND_NAK, "Bind_nak"},
{ PDU_ALTER, "Alter_context"},
{ PDU_ALTER_ACK, "Alter_context_resp"},
{ PDU_AUTH3, "AUTH3?"},
{ PDU_SHUTDOWN, "Shutdown"},
{ PDU_CO_CANCEL, "Co_cancel"},
{ PDU_ORPHANED, "Orphaned"},
{ 0, NULL }
};
static const value_string drep_byteorder_vals[] = {
{ 0, "Big-endian" },
{ 1, "Little-endian" },
{ 0, NULL }
};
static const value_string drep_character_vals[] = {
{ 0, "ASCII" },
{ 1, "EBCDIC" },
{ 0, NULL }
};
#define DCE_RPC_DREP_FP_IEEE 0
#define DCE_RPC_DREP_FP_VAX 1
#define DCE_RPC_DREP_FP_CRAY 2
#define DCE_RPC_DREP_FP_IBM 3
static const value_string drep_fp_vals[] = {
{ DCE_RPC_DREP_FP_IEEE, "IEEE" },
{ DCE_RPC_DREP_FP_VAX, "VAX" },
{ DCE_RPC_DREP_FP_CRAY, "Cray" },
{ DCE_RPC_DREP_FP_IBM, "IBM" },
{ 0, NULL }
};
/*
* Authentication services.
*/
#define DCE_C_RPC_AUTHN_PROTOCOL_NONE 0
#define DCE_C_RPC_AUTHN_PROTOCOL_KRB5 1
#define DCE_C_RPC_AUTHN_PROTOCOL_SPNEGO 9
#define DCE_C_RPC_AUTHN_PROTOCOL_NTLMSSP 10
#define DCE_C_RPC_AUTHN_PROTOCOL_SEC_CHAN 68
static const value_string authn_protocol_vals[] = {
{ DCE_C_RPC_AUTHN_PROTOCOL_NONE, "None" },
{ DCE_C_RPC_AUTHN_PROTOCOL_KRB5, "Kerberos 5" },
{ DCE_C_RPC_AUTHN_PROTOCOL_SPNEGO, "SPNEGO" },
{ DCE_C_RPC_AUTHN_PROTOCOL_NTLMSSP, "NTLMSSP" },
{ DCE_C_RPC_AUTHN_PROTOCOL_SEC_CHAN,"NETLOGON Secure Channel" },
{ 0, NULL }
};
/*
* Protection levels.
*/
#define DCE_C_AUTHN_LEVEL_NONE 1
#define DCE_C_AUTHN_LEVEL_CONNECT 2
#define DCE_C_AUTHN_LEVEL_CALL 3
#define DCE_C_AUTHN_LEVEL_PKT 4
#define DCE_C_AUTHN_LEVEL_PKT_INTEGRITY 5
#define DCE_C_AUTHN_LEVEL_PKT_PRIVACY 6
static const value_string authn_level_vals[] = {
{ DCE_C_AUTHN_LEVEL_NONE, "None" },
{ DCE_C_AUTHN_LEVEL_CONNECT, "Connect" },
{ DCE_C_AUTHN_LEVEL_CALL, "Call" },
{ DCE_C_AUTHN_LEVEL_PKT, "Packet" },
{ DCE_C_AUTHN_LEVEL_PKT_INTEGRITY, "Packet integrity" },
{ DCE_C_AUTHN_LEVEL_PKT_PRIVACY, "Packet privacy" },
{ 0, NULL }
};
/*
* Flag bits in first flag field in connectionless PDU header.
*/
#define PFCL1_RESERVED_01 0x01 /* Reserved for use by implementations */
#define PFCL1_LASTFRAG 0x02 /* If set, the PDU is the last
* fragment of a multi-PDU
* transmission */
#define PFCL1_FRAG 0x04 /* If set, the PDU is a fragment of
a multi-PDU transmission */
#define PFCL1_NOFACK 0x08 /* If set, the receiver is not
* requested to send a `fack' PDU
* for the fragment */
#define PFCL1_MAYBE 0x10 /* If set, the PDU is for a `maybe'
* request */
#define PFCL1_IDEMPOTENT 0x20 /* If set, the PDU is for an idempotent
* request */
#define PFCL1_BROADCAST 0x40 /* If set, the PDU is for a broadcast
* request */
#define PFCL1_RESERVED_80 0x80 /* Reserved for use by implementations */
/*
* Flag bits in second flag field in connectionless PDU header.
*/
#define PFCL2_RESERVED_01 0x01 /* Reserved for use by implementations */
#define PFCL2_CANCEL_PENDING 0x02 /* Cancel pending at the call end */
#define PFCL2_RESERVED_04 0x04 /* Reserved for future use */
#define PFCL2_RESERVED_08 0x08 /* Reserved for future use */
#define PFCL2_RESERVED_10 0x10 /* Reserved for future use */
#define PFCL2_RESERVED_20 0x20 /* Reserved for future use */
#define PFCL2_RESERVED_40 0x40 /* Reserved for future use */
#define PFCL2_RESERVED_80 0x80 /* Reserved for future use */
/*
* Flag bits in connection-oriented PDU header.
*/
#define PFC_FIRST_FRAG 0x01 /* First fragment */
#define PFC_LAST_FRAG 0x02 /* Last fragment */
#define PFC_PENDING_CANCEL 0x04 /* Cancel was pending at sender */
#define PFC_RESERVED_1 0x08
#define PFC_CONC_MPX 0x10 /* suports concurrent multiplexing
* of a single connection. */
#define PFC_DID_NOT_EXECUTE 0x20 /* only meaningful on `fault' packet;
* if true, guaranteed call did not
* execute. */
#define PFC_MAYBE 0x40 /* `maybe' call semantics requested */
#define PFC_OBJECT_UUID 0x80 /* if true, a non-nil object UUID
* was specified in the handle, and
* is present in the optional object
* field. If false, the object field
* is omitted. */
/*
* Tests whether a connection-oriented PDU is fragmented; returns TRUE if
* it's not fragmented (i.e., this is both the first *and* last fragment),
* and FALSE otherwise.
*/
#define PFC_NOT_FRAGMENTED(hdr) \
((hdr->flags&(PFC_FIRST_FRAG|PFC_LAST_FRAG))==(PFC_FIRST_FRAG|PFC_LAST_FRAG))
/*
* Presentation context negotiation result.
*/
static const value_string p_cont_result_vals[] = {
{ 0, "Acceptance" },
{ 1, "User rejection" },
{ 2, "Provider rejection" },
{ 0, NULL }
};
/*
* Presentation context negotiation rejection reasons.
*/
static const value_string p_provider_reason_vals[] = {
{ 0, "Reason not specified" },
{ 1, "Abstract syntax not supported" },
{ 2, "Proposed transfer syntaxes not supported" },
{ 3, "Local limit exceeded" },
{ 0, NULL }
};
/*
* Reject reasons.
*/
#define REASON_NOT_SPECIFIED 0
#define TEMPORARY_CONGESTION 1
#define LOCAL_LIMIT_EXCEEDED 2
#define CALLED_PADDR_UNKNOWN 3 /* not used */
#define PROTOCOL_VERSION_NOT_SUPPORTED 4
#define DEFAULT_CONTEXT_NOT_SUPPORTED 5 /* not used */
#define USER_DATA_NOT_READABLE 6 /* not used */
#define NO_PSAP_AVAILABLE 7 /* not used */
static const value_string reject_reason_vals[] = {
{ REASON_NOT_SPECIFIED, "Reason not specified" },
{ TEMPORARY_CONGESTION, "Temporary congestion" },
{ LOCAL_LIMIT_EXCEEDED, "Local limit exceeded" },
{ CALLED_PADDR_UNKNOWN, "Called paddr unknown" },
{ PROTOCOL_VERSION_NOT_SUPPORTED, "Protocol version not supported" },
{ DEFAULT_CONTEXT_NOT_SUPPORTED, "Default context not supported" },
{ USER_DATA_NOT_READABLE, "User data not readable" },
{ NO_PSAP_AVAILABLE, "No PSAP available" },
{ 0, NULL }
};
/*
* Reject status codes.
*/
static const value_string reject_status_vals[] = {
{ 0, "Stub-defined exception" },
{ 0x1c000001, "nca_s_fault_int_div_by_zero" },
{ 0x1c000002, "nca_s_fault_addr_error" },
{ 0x1c000003, "nca_s_fault_fp_div_zero" },
{ 0x1c000004, "nca_s_fault_fp_underflow" },
{ 0x1c000005, "nca_s_fault_fp_overflow" },
{ 0x1c000006, "nca_s_fault_invalid_tag" },
{ 0x1c000007, "nca_s_fault_invalid_bound" },
{ 0x1c000008, "nca_rpc_version_mismatch" },
{ 0x1c000009, "nca_unspec_reject" },
{ 0x1c00000a, "nca_s_bad_actid" },
{ 0x1c00000b, "nca_who_are_you_failed" },
{ 0x1c00000c, "nca_manager_not_entered" },
{ 0x1c00000d, "nca_s_fault_cancel" },
{ 0x1c00000e, "nca_s_fault_ill_inst" },
{ 0x1c00000f, "nca_s_fault_fp_error" },
{ 0x1c000010, "nca_s_fault_int_overflow" },
{ 0x1c000014, "nca_s_fault_pipe_empty" },
{ 0x1c000015, "nca_s_fault_pipe_closed" },
{ 0x1c000016, "nca_s_fault_pipe_order" },
{ 0x1c000017, "nca_s_fault_pipe_discipline" },
{ 0x1c000018, "nca_s_fault_pipe_comm_error" },
{ 0x1c000019, "nca_s_fault_pipe_memory" },
{ 0x1c00001a, "nca_s_fault_context_mismatch" },
{ 0x1c00001b, "nca_s_fault_remote_no_memory" },
{ 0x1c00001c, "nca_invalid_pres_context_id" },
{ 0x1c00001d, "nca_unsupported_authn_level" },
{ 0x1c00001f, "nca_invalid_checksum" },
{ 0x1c000020, "nca_invalid_crc" },
{ 0x1c000021, "ncs_s_fault_user_defined" },
{ 0x1c000022, "nca_s_fault_tx_open_failed" },
{ 0x1c000023, "nca_s_fault_codeset_conv_error" },
{ 0x1c000024, "nca_s_fault_object_not_found" },
{ 0x1c000025, "nca_s_fault_no_client_stub" },
{ 0x1c010002, "nca_op_rng_error" },
{ 0x1c010003, "nca_unk_if"},
{ 0x1c010006, "nca_wrong_boot_time" },
{ 0x1c010009, "nca_s_you_crashed" },
{ 0x1c01000b, "nca_proto_error" },
{ 0x1c010013, "nca_out_args_too_big" },
{ 0x1c010014, "nca_server_too_busy" },
{ 0x1c010017, "nca_unsupported_type" },
{ 0, NULL }
};
static int proto_dcerpc = -1;
/* field defines */
static int hf_dcerpc_request_in = -1;
static int hf_dcerpc_time = -1;
static int hf_dcerpc_response_in = -1;
static int hf_dcerpc_ver = -1;
static int hf_dcerpc_ver_minor = -1;
static int hf_dcerpc_packet_type = -1;
static int hf_dcerpc_cn_flags = -1;
static int hf_dcerpc_cn_flags_first_frag = -1;
static int hf_dcerpc_cn_flags_last_frag = -1;
static int hf_dcerpc_cn_flags_cancel_pending = -1;
static int hf_dcerpc_cn_flags_reserved = -1;
static int hf_dcerpc_cn_flags_mpx = -1;
static int hf_dcerpc_cn_flags_dne = -1;
static int hf_dcerpc_cn_flags_maybe = -1;
static int hf_dcerpc_cn_flags_object = -1;
static int hf_dcerpc_drep = -1;
static int hf_dcerpc_drep_byteorder = -1;
static int hf_dcerpc_drep_character = -1;
static int hf_dcerpc_drep_fp = -1;
static int hf_dcerpc_cn_frag_len = -1;
static int hf_dcerpc_cn_auth_len = -1;
static int hf_dcerpc_cn_call_id = -1;
static int hf_dcerpc_cn_max_xmit = -1;
static int hf_dcerpc_cn_max_recv = -1;
static int hf_dcerpc_cn_assoc_group = -1;
static int hf_dcerpc_cn_num_ctx_items = -1;
static int hf_dcerpc_cn_ctx_id = -1;
static int hf_dcerpc_cn_num_trans_items = -1;
static int hf_dcerpc_cn_bind_if_id = -1;
static int hf_dcerpc_cn_bind_if_ver = -1;
static int hf_dcerpc_cn_bind_if_ver_minor = -1;
static int hf_dcerpc_cn_bind_trans_id = -1;
static int hf_dcerpc_cn_bind_trans_ver = -1;
static int hf_dcerpc_cn_alloc_hint = -1;
static int hf_dcerpc_cn_sec_addr_len = -1;
static int hf_dcerpc_cn_sec_addr = -1;
static int hf_dcerpc_cn_num_results = -1;
static int hf_dcerpc_cn_ack_result = -1;
static int hf_dcerpc_cn_ack_reason = -1;
static int hf_dcerpc_cn_ack_trans_id = -1;
static int hf_dcerpc_cn_ack_trans_ver = -1;
static int hf_dcerpc_cn_reject_reason = -1;
static int hf_dcerpc_cn_num_protocols = -1;
static int hf_dcerpc_cn_protocol_ver_major = -1;
static int hf_dcerpc_cn_protocol_ver_minor = -1;
static int hf_dcerpc_cn_cancel_count = -1;
static int hf_dcerpc_cn_status = -1;
static int hf_dcerpc_auth_type = -1;
static int hf_dcerpc_auth_level = -1;
static int hf_dcerpc_auth_pad_len = -1;
static int hf_dcerpc_auth_rsrvd = -1;
static int hf_dcerpc_auth_ctx_id = -1;
static int hf_dcerpc_dg_flags1 = -1;
static int hf_dcerpc_dg_flags1_rsrvd_01 = -1;
static int hf_dcerpc_dg_flags1_last_frag = -1;
static int hf_dcerpc_dg_flags1_frag = -1;
static int hf_dcerpc_dg_flags1_nofack = -1;
static int hf_dcerpc_dg_flags1_maybe = -1;
static int hf_dcerpc_dg_flags1_idempotent = -1;
static int hf_dcerpc_dg_flags1_broadcast = -1;
static int hf_dcerpc_dg_flags1_rsrvd_80 = -1;
static int hf_dcerpc_dg_flags2 = -1;
static int hf_dcerpc_dg_flags2_rsrvd_01 = -1;
static int hf_dcerpc_dg_flags2_cancel_pending = -1;
static int hf_dcerpc_dg_flags2_rsrvd_04 = -1;
static int hf_dcerpc_dg_flags2_rsrvd_08 = -1;
static int hf_dcerpc_dg_flags2_rsrvd_10 = -1;
static int hf_dcerpc_dg_flags2_rsrvd_20 = -1;
static int hf_dcerpc_dg_flags2_rsrvd_40 = -1;
static int hf_dcerpc_dg_flags2_rsrvd_80 = -1;
static int hf_dcerpc_dg_serial_hi = -1;
static int hf_dcerpc_obj_id = -1;
static int hf_dcerpc_dg_if_id = -1;
static int hf_dcerpc_dg_act_id = -1;
static int hf_dcerpc_dg_serial_lo = -1;
static int hf_dcerpc_dg_ahint = -1;
static int hf_dcerpc_dg_ihint = -1;
static int hf_dcerpc_dg_frag_len = -1;
static int hf_dcerpc_dg_frag_num = -1;
static int hf_dcerpc_dg_auth_proto = -1;
static int hf_dcerpc_opnum = -1;
static int hf_dcerpc_dg_seqnum = -1;
static int hf_dcerpc_dg_server_boot = -1;
static int hf_dcerpc_dg_if_ver = -1;
static int hf_dcerpc_krb5_av_prot_level = -1;
static int hf_dcerpc_krb5_av_key_vers_num = -1;
static int hf_dcerpc_krb5_av_key_auth_verifier = -1;
static int hf_dcerpc_dg_cancel_vers = -1;
static int hf_dcerpc_dg_cancel_id = -1;
static int hf_dcerpc_dg_server_accepting_cancels = -1;
static int hf_dcerpc_dg_fack_vers = -1;
static int hf_dcerpc_dg_fack_window_size = -1;
static int hf_dcerpc_dg_fack_max_tsdu = -1;
static int hf_dcerpc_dg_fack_max_frag_size = -1;
static int hf_dcerpc_dg_fack_serial_num = -1;
static int hf_dcerpc_dg_fack_selack_len = -1;
static int hf_dcerpc_dg_fack_selack = -1;
static int hf_dcerpc_dg_status = -1;
static int hf_dcerpc_array_max_count = -1;
static int hf_dcerpc_array_offset = -1;
static int hf_dcerpc_array_actual_count = -1;
static int hf_dcerpc_op = -1;
static int hf_dcerpc_referent_id = -1;
static int hf_dcerpc_fragments = -1;
static int hf_dcerpc_fragment = -1;
static int hf_dcerpc_fragment_overlap = -1;
static int hf_dcerpc_fragment_overlap_conflict = -1;
static int hf_dcerpc_fragment_multiple_tails = -1;
static int hf_dcerpc_fragment_too_long_fragment = -1;
static int hf_dcerpc_fragment_error = -1;
static gint ett_dcerpc = -1;
static gint ett_dcerpc_cn_flags = -1;
static gint ett_dcerpc_drep = -1;
static gint ett_dcerpc_dg_flags1 = -1;
static gint ett_dcerpc_dg_flags2 = -1;
static gint ett_dcerpc_pointer_data = -1;
static gint ett_dcerpc_fragments = -1;
static gint ett_dcerpc_fragment = -1;
static gint ett_decrpc_krb5_auth_verf = -1;
static dissector_handle_t ntlmssp_handle, gssapi_handle;
fragment_items dcerpc_frag_items = {
&ett_dcerpc_fragments,
&ett_dcerpc_fragment,
&hf_dcerpc_fragments,
&hf_dcerpc_fragment,
&hf_dcerpc_fragment_overlap,
&hf_dcerpc_fragment_overlap_conflict,
&hf_dcerpc_fragment_multiple_tails,
&hf_dcerpc_fragment_too_long_fragment,
&hf_dcerpc_fragment_error,
"fragments"
};
/* try to desegment big DCE/RPC packets over TCP? */
static gboolean dcerpc_cn_desegment = TRUE;
/* reassemble DCE/RPC fragments */
/* reassembly of dcerpc fragments will not work for the case where ONE frame
might contain multiple dcerpc fragments for different PDUs.
this case would be so unusual/weird so if you got captures like that:
too bad
*/
static gboolean dcerpc_reassemble = FALSE;
static GHashTable *dcerpc_co_reassemble_table = NULL;
static GHashTable *dcerpc_cl_reassemble_table = NULL;
static void
dcerpc_reassemble_init(void)
{
fragment_table_init(&dcerpc_co_reassemble_table);
fragment_table_init(&dcerpc_cl_reassemble_table);
}
/*
* Subdissectors
*/
/* the registered subdissectors */
static GHashTable *dcerpc_uuids;
typedef struct _dcerpc_uuid_key {
e_uuid_t uuid;
guint16 ver;
} dcerpc_uuid_key;
typedef struct _dcerpc_uuid_value {
int proto;
int ett;
gchar *name;
dcerpc_sub_dissector *procs;
int opnum_hf;
} dcerpc_uuid_value;
static gint
dcerpc_uuid_equal (gconstpointer k1, gconstpointer k2)
{
dcerpc_uuid_key *key1 = (dcerpc_uuid_key *)k1;
dcerpc_uuid_key *key2 = (dcerpc_uuid_key *)k2;
return ((memcmp (&key1->uuid, &key2->uuid, sizeof (e_uuid_t)) == 0)
&& (key1->ver == key2->ver));
}
static guint
dcerpc_uuid_hash (gconstpointer k)
{
dcerpc_uuid_key *key = (dcerpc_uuid_key *)k;
/* This isn't perfect, but the Data1 part of these is almost always
unique. */
return key->uuid.Data1;
}
void
dcerpc_init_uuid (int proto, int ett, e_uuid_t *uuid, guint16 ver,
dcerpc_sub_dissector *procs, int opnum_hf)
{
dcerpc_uuid_key *key = g_malloc (sizeof (*key));
dcerpc_uuid_value *value = g_malloc (sizeof (*value));
key->uuid = *uuid;
key->ver = ver;
value->proto = proto;
value->ett = ett;
value->name = proto_get_protocol_short_name (proto);
value->procs = procs;
value->opnum_hf = opnum_hf;
g_hash_table_insert (dcerpc_uuids, key, value);
}
/*
* To keep track of ctx_id mappings.
*
* Everytime we see a bind call we update this table.
* Note that we always specify a SMB FID. For non-SMB transports this
* value is 0.
*/
static GHashTable *dcerpc_binds=NULL;
typedef struct _dcerpc_bind_key {
conversation_t *conv;
guint16 ctx_id;
guint16 smb_fid;
} dcerpc_bind_key;
typedef struct _dcerpc_bind_value {
e_uuid_t uuid;
guint16 ver;
} dcerpc_bind_value;
static GMemChunk *dcerpc_bind_key_chunk=NULL;
static GMemChunk *dcerpc_bind_value_chunk=NULL;
static gint
dcerpc_bind_equal (gconstpointer k1, gconstpointer k2)
{
dcerpc_bind_key *key1 = (dcerpc_bind_key *)k1;
dcerpc_bind_key *key2 = (dcerpc_bind_key *)k2;
return (key1->conv == key2->conv
&& key1->ctx_id == key2->ctx_id
&& key1->smb_fid == key2->smb_fid);
}
static guint
dcerpc_bind_hash (gconstpointer k)
{
dcerpc_bind_key *key = (dcerpc_bind_key *)k;
return ((guint)key->conv) + key->ctx_id + key->smb_fid;
}
/*
* To keep track of callid mappings. Should really use some generic
* conversation support instead.
*/
static GHashTable *dcerpc_calls=NULL;
typedef struct _dcerpc_call_key {
conversation_t *conv;
guint32 call_id;
guint16 smb_fid;
} dcerpc_call_key;
static GMemChunk *dcerpc_call_key_chunk=NULL;
static GMemChunk *dcerpc_call_value_chunk=NULL;
static gint
dcerpc_call_equal (gconstpointer k1, gconstpointer k2)
{
dcerpc_call_key *key1 = (dcerpc_call_key *)k1;
dcerpc_call_key *key2 = (dcerpc_call_key *)k2;
return (key1->conv == key2->conv
&& key1->call_id == key2->call_id
&& key1->smb_fid == key2->smb_fid);
}
static guint
dcerpc_call_hash (gconstpointer k)
{
dcerpc_call_key *key = (dcerpc_call_key *)k;
return ((guint32)key->conv) + key->call_id + key->smb_fid;
}
/* to keep track of matched calls/responses
this one uses the same value struct as calls, but the key is the frame id
*/
static GHashTable *dcerpc_matched=NULL;
static gint
dcerpc_matched_equal (gconstpointer k1, gconstpointer k2)
{
return (guint32)k1 == (guint32)k2;
}
static guint
dcerpc_matched_hash (gconstpointer k)
{
return (guint32)k;
}
/*
* Utility functions. Modeled after packet-rpc.c
*/
int
dissect_dcerpc_uint8 (tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
proto_tree *tree, char *drep,
int hfindex, guint8 *pdata)
{
guint8 data;
data = tvb_get_guint8 (tvb, offset);
if (tree) {
proto_tree_add_item (tree, hfindex, tvb, offset, 1, (drep[0] & 0x10));
}
if (pdata)
*pdata = data;
return offset + 1;
}
int
dissect_dcerpc_uint16 (tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
proto_tree *tree, char *drep,
int hfindex, guint16 *pdata)
{
guint16 data;
data = ((drep[0] & 0x10)
? tvb_get_letohs (tvb, offset)
: tvb_get_ntohs (tvb, offset));
if (tree) {
proto_tree_add_item (tree, hfindex, tvb, offset, 2, (drep[0] & 0x10));
}
if (pdata)
*pdata = data;
return offset + 2;
}
int
dissect_dcerpc_uint32 (tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
proto_tree *tree, char *drep,
int hfindex, guint32 *pdata)
{
guint32 data;
data = ((drep[0] & 0x10)
? tvb_get_letohl (tvb, offset)
: tvb_get_ntohl (tvb, offset));
if (tree) {
proto_tree_add_item (tree, hfindex, tvb, offset, 4, (drep[0] & 0x10));
}
if (pdata)
*pdata = data;
return offset+4;
}
/* handles 32 bit unix time_t */
int
dissect_dcerpc_time_t (tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
proto_tree *tree, char *drep,
int hfindex, guint32 *pdata)
{
guint32 data;
nstime_t tv;
data = ((drep[0] & 0x10)
? tvb_get_letohl (tvb, offset)
: tvb_get_ntohl (tvb, offset));
tv.secs=data;
tv.nsecs=0;
if (tree) {
proto_tree_add_time (tree, hfindex, tvb, offset, 4, &tv);
}
if (pdata)
*pdata = data;
return offset+4;
}
int
dissect_dcerpc_uint64 (tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
proto_tree *tree, char *drep,
int hfindex, unsigned char *pdata)
{
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;
}
int
dissect_dcerpc_float(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
proto_tree *tree, char *drep,
int hfindex, gfloat *pdata)
{
gfloat data;
switch(drep[1]) {
case(DCE_RPC_DREP_FP_IEEE):
data = ((drep[0] & 0x10)
? tvb_get_letohieee_float(tvb, offset)
: tvb_get_ntohieee_float(tvb, offset));
if (tree) {
proto_tree_add_float(tree, hfindex, tvb, offset, 4, data);
}
break;
case(DCE_RPC_DREP_FP_VAX): /* (fall trough) */
case(DCE_RPC_DREP_FP_CRAY): /* (fall trough) */
case(DCE_RPC_DREP_FP_IBM): /* (fall trough) */
default:
/* ToBeDone: non IEEE floating formats */
/* Set data to a negative infinity value */
data = -1.0 * 1e100 * 1e100;
if (tree) {
proto_tree_add_debug_text(tree, "DCE RPC: dissection of non IEEE floating formats currently not implemented (drep=%u)!", drep[1]);
}
}
if (pdata)
*pdata = data;
return offset + 4;
}
int
dissect_dcerpc_double(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_,
proto_tree *tree, char *drep,
int hfindex, gdouble *pdata)
{
gdouble data;
switch(drep[1]) {
case(DCE_RPC_DREP_FP_IEEE):
data = ((drep[0] & 0x10)
? tvb_get_letohieee_double(tvb, offset)
: tvb_get_ntohieee_double(tvb, offset));
if (tree) {
proto_tree_add_double(tree, hfindex, tvb, offset, 8, data);
}
break;
case(DCE_RPC_DREP_FP_VAX): /* (fall trough) */
case(DCE_RPC_DREP_FP_CRAY): /* (fall trough) */
case(DCE_RPC_DREP_FP_IBM): /* (fall trough) */
default:
/* ToBeDone: non IEEE double formats */
/* Set data to a negative infinity value */
data = -1.0 * 1e100 * 1e100;
if (tree) {
proto_tree_add_debug_text(tree, "DCE RPC: dissection of non IEEE double formats currently not implemented (drep=%u)!", drep[1]);
}
}
if (pdata)
*pdata = data;
return offset + 8;
}
/*
* 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,
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 == info->call_data->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, info->request ? "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.
*/
if (sub_proto->opnum_hf != -1)
proto_tree_add_uint_format(sub_tree, sub_proto->opnum_hf,
tvb, 0, 0, info->call_data->opnum,
"Operation: %s (%u)",
name, info->call_data->opnum);
else
proto_tree_add_uint_format(sub_tree, hf_dcerpc_op, tvb,
0, 0, info->call_data->opnum,
"Operation: %s (%u)",
name, info->call_data->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 = info->request ? 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;
guint8 auth_type;
/*
* 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, &auth_type);
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);
/* Dissect the authentication data */
switch(auth_type) {
/* NTLMSSP */
case DCE_C_RPC_AUTHN_PROTOCOL_NTLMSSP: {
tvbuff_t *ntlmssp_tvb;
ntlmssp_tvb = tvb_new_subset(tvb, offset, hdr->auth_len,
hdr->auth_len);
call_dissector(ntlmssp_handle, ntlmssp_tvb, pinfo,
dcerpc_tree);
break;
}
/* SPNEGO (rfc2478) */
case DCE_C_RPC_AUTHN_PROTOCOL_SPNEGO: {
tvbuff_t *gssapi_tvb;
gssapi_tvb = tvb_new_subset(tvb, offset, hdr->auth_len,
hdr->auth_len);
call_dissector(gssapi_handle, gssapi_tvb, pinfo, dcerpc_tree);
break;
}
default:
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)) {
dcerpc_uuid_key key;
dcerpc_uuid_value *value;
key.uuid = if_id;
key.ver = if_ver;
if ((value = g_hash_table_lookup(dcerpc_uuids, &key)))
col_append_fstr(pinfo->cinfo, COL_INFO, " UUID: %s", value->name);
else
col_append_fstr(pinfo->cinfo, COL_INFO, " UUID: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x ver %u.%u",
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);
if (result != 0) {
offset = dissect_dcerpc_uint16 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_cn_ack_reason,
&reason);
} else {
/*
* The reason for rejection isn't meaningful, and often isn't
* set, when the syntax was accepted.
*/
offset += 2;
}
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) {
/* XXX - only checks the last result */
col_append_fstr (pinfo->cinfo, COL_INFO,
" accept max_xmit: %u max_recv: %u",
max_xmit, max_recv);
} else {
/* XXX - only shows the last result and reason */
col_append_fstr (pinfo->cinfo, COL_INFO, " %s, reason: %s",
val_to_str(result, p_cont_result_vals,
"Unknown result (%u)"),
val_to_str(reason, p_provider_reason_vals,
"Unknown (%u)"));
}
}
}
static void
dissect_dcerpc_cn_bind_nak (tvbuff_t *tvb, packet_info *pinfo, proto_tree *dcerpc_tree,
e_dce_cn_common_hdr_t *hdr)
{
guint16 reason;
guint8 num_protocols;
guint i;
int offset = 16;
offset = dissect_dcerpc_uint16 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_cn_reject_reason,
&reason);
if (check_col (pinfo->cinfo, COL_INFO)) {
col_append_fstr (pinfo->cinfo, COL_INFO, " reason: %s",
val_to_str(reason, reject_reason_vals, "Unknown (%u)"));
}
if (reason == PROTOCOL_VERSION_NOT_SUPPORTED) {
offset = dissect_dcerpc_uint8 (tvb, offset, pinfo, dcerpc_tree, hdr->drep,
hf_dcerpc_cn_num_protocols,
&num_protocols);
for (i = 0; i < num_protocols; i++) {
offset = dissect_dcerpc_uint8 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_cn_protocol_ver_major,
NULL);
offset = dissect_dcerpc_uint8 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_cn_protocol_ver_minor,
NULL);
}
}
}
static void
dissect_dcerpc_cn_stub (tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *dcerpc_tree, proto_tree *tree,
e_dce_cn_common_hdr_t *hdr, dcerpc_info *di,
int auth_sz, int auth_level, guint32 alloc_hint,
guint32 frame)
{
int length, reported_length, stub_length;
gboolean save_fragmented;
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;
save_fragmented = pinfo->fragmented;
/* If we don't have reassembly enabled, or this packet contains
the entire PDU, or if this is a short frame (or a frame
not reassembled at a lower layer) that doesn't include all
the data in the fragment, just call the handoff directly if
this is the first fragment or the PDU isn't fragmented. */
if( (!dcerpc_reassemble) || PFC_NOT_FRAGMENTED(hdr) ||
stub_length > length ){
if(hdr->flags&PFC_FIRST_FRAG){
/* First fragment, possibly the only fragment */
pinfo->fragmented = !PFC_NOT_FRAGMENTED(hdr);
dcerpc_try_handoff (pinfo, tree, dcerpc_tree,
tvb_new_subset (tvb, offset, length,
reported_length),
0, hdr->drep, di, auth_level);
} else {
/* PDU is fragmented and this isn't the first fragment */
if (check_col(pinfo->cinfo, COL_INFO)) {
col_append_fstr(pinfo->cinfo, COL_INFO,
" [DCE/RPC fragment]");
}
if (dcerpc_tree) {
if (length > 0) {
proto_tree_add_text (dcerpc_tree, tvb, offset, length,
"Fragment data (%d byte%s)", length,
plurality(length, "", "s"));
}
}
}
} else {
/* Reassembly is enabled, the PDU is fragmented, and
we have all the data in the fragment; the first two
of those mean we should attempt reassembly, and the
third means we can attempt reassembly. */
if (dcerpc_tree) {
if (length > 0) {
proto_tree_add_text (dcerpc_tree, tvb, offset, length,
"Fragment data (%d byte%s)", length,
plurality(length, "", "s"));
}
}
if(hdr->flags&PFC_FIRST_FRAG){ /* FIRST fragment */
if( (!pinfo->fd->flags.visited) && frame){
fragment_add(tvb, offset, pinfo, frame,
dcerpc_co_reassemble_table,
0,
length,
TRUE);
fragment_set_tot_len(pinfo, frame,
dcerpc_co_reassemble_table, alloc_hint);
}
if (check_col(pinfo->cinfo, COL_INFO)) {
col_append_fstr(pinfo->cinfo, COL_INFO,
" [DCE/RPC fragment]");
}
} else if(hdr->flags&PFC_LAST_FRAG){ /* LAST fragment */
if( frame ){
fragment_data *fd_head;
guint32 tot_len;
tot_len = fragment_get_tot_len(pinfo, frame,
dcerpc_co_reassemble_table);
fd_head = fragment_add(tvb, offset, pinfo,
frame,
dcerpc_co_reassemble_table,
tot_len-alloc_hint,
length,
TRUE);
if(fd_head){
/* We completed reassembly */
tvbuff_t *next_tvb;
next_tvb = tvb_new_real_data(fd_head->data, fd_head->datalen, fd_head->datalen);
tvb_set_child_real_data_tvbuff(tvb, next_tvb);
add_new_data_source(pinfo, next_tvb, "Reassembled DCE/RPC");
show_fragment_tree(fd_head, &dcerpc_frag_items,
dcerpc_tree, pinfo, next_tvb);
pinfo->fragmented = FALSE;
dcerpc_try_handoff (pinfo, tree, dcerpc_tree, next_tvb,
0, hdr->drep, di, auth_level);
} else {
/* Reassembly not complete - some fragments
are missing */
if (check_col(pinfo->cinfo, COL_INFO)) {
col_append_fstr(pinfo->cinfo, COL_INFO,
" [DCE/RPC fragment]");
}
}
}
} else { /* MIDDLE fragment(s) */
if( (!pinfo->fd->flags.visited) && frame ){
guint32 tot_len;
tot_len = fragment_get_tot_len(pinfo, frame,
dcerpc_co_reassemble_table);
fragment_add(tvb, offset, pinfo, frame,
dcerpc_co_reassemble_table,
tot_len-alloc_hint,
length,
TRUE);
}
if (check_col(pinfo->cinfo, COL_INFO)) {
col_append_fstr(pinfo->cinfo, COL_INFO,
" [DCE/RPC fragment]");
}
}
}
pinfo->fragmented = save_fragmented;
}
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;
int length;
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_append_fstr (pinfo->cinfo, COL_INFO, " opnum: %u ctx_id: %u",
opnum, ctx_id);
}
if (hdr->flags & PFC_OBJECT_UUID) {
dcerpc_tvb_get_uuid (tvb, offset, hdr->drep, &obj_id);
if (dcerpc_tree) {
proto_tree_add_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;
/* !!! 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->req_time.secs=pinfo->fd->abs_secs;
call_value->req_time.nsecs=pinfo->fd->abs_usecs*1000;
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) {
dcerpc_info di;
/* handoff this call */
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);
}
dissect_dcerpc_cn_stub (tvb, offset, pinfo, dcerpc_tree, tree,
hdr, &di, auth_sz, auth_level, alloc_hint,
value->req_frame);
} else {
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"));
}
}
}
}
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;
int length;
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_append_fstr (pinfo->cinfo, COL_INFO, " ctx_id: %u", ctx_id);
}
offset = dissect_dcerpc_uint8 (tvb, offset, pinfo, dcerpc_tree, hdr->drep,
hf_dcerpc_cn_cancel_count, NULL);
/* padding */
offset++;
/*
* XXX - what if this was set when the connection was set up,
* and we just have a security context?
*/
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) {
dcerpc_info di;
/* handoff this call */
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){
nstime_t ns;
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_request_in,
tvb, 0, 0, value->req_frame);
ns.secs= pinfo->fd->abs_secs-value->req_time.secs;
ns.nsecs=pinfo->fd->abs_usecs*1000-value->req_time.nsecs;
if(ns.nsecs<0){
ns.nsecs+=1000000000;
ns.secs--;
}
proto_tree_add_time(dcerpc_tree, hf_dcerpc_time, tvb, offset, 0, &ns);
}
dissect_dcerpc_cn_stub (tvb, offset, pinfo, dcerpc_tree, tree,
hdr, &di, auth_sz, auth_level, alloc_hint,
value->rep_frame);
} else {
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"));
}
}
}
}
static void
dissect_dcerpc_cn_fault (tvbuff_t *tvb, packet_info *pinfo,
proto_tree *dcerpc_tree, e_dce_cn_common_hdr_t *hdr)
{
dcerpc_call_value *value = NULL;
conversation_t *conv;
guint16 ctx_id;
guint32 status;
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);
offset = dissect_dcerpc_uint8 (tvb, offset, pinfo, dcerpc_tree, hdr->drep,
hf_dcerpc_cn_cancel_count, NULL);
/* padding */
offset++;
offset = dissect_dcerpc_uint32 (tvb, offset, pinfo, dcerpc_tree, hdr->drep,
hf_dcerpc_cn_status, &status);
if (check_col (pinfo->cinfo, COL_INFO)) {
col_append_fstr (pinfo->cinfo, COL_INFO,
" ctx_id: %u status: %s", ctx_id,
val_to_str(status, reject_status_vals,
"Unknown (0x%08x)"));
}
/* padding */
offset += 4;
/*
* XXX - what if this was set when the connection was set up,
* and we just have a security context?
*/
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 */
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){
nstime_t ns;
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_request_in,
tvb, 0, 0, value->req_frame);
ns.secs= pinfo->fd->abs_secs-value->req_time.secs;
ns.nsecs=pinfo->fd->abs_usecs*1000-value->req_time.nsecs;
if(ns.nsecs<0){
ns.nsecs+=1000000000;
ns.secs--;
}
proto_tree_add_time(dcerpc_tree, hf_dcerpc_time, tvb, offset, 0, &ns);
}
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;
/* If we don't have reassembly enabled, or this packet contains
the entire PDU, or if this is a short frame (or a frame
not reassembled at a lower layer) that doesn't include all
the data in the fragment, just call the handoff directly if
this is the first fragment or the PDU isn't fragmented. */
if( (!dcerpc_reassemble) || PFC_NOT_FRAGMENTED(hdr) ||
stub_length > length ){
if(hdr->flags&PFC_FIRST_FRAG){
/* First fragment, possibly the only fragment */
/*
* XXX - should there be a third routine for each
* function in an RPC subdissector, to handle
* fault responses? The DCE RPC 1.1 spec says
* three's "stub data" here, which I infer means
* that it's protocol-specific and call-specific.
*
* It should probably get passed the status code
* as well, as that might be protocol-specific.
*/
if (dcerpc_tree) {
if (length > 0) {
proto_tree_add_text (dcerpc_tree, tvb, offset, length,
"Fault stub data (%d byte%s)", length,
plurality(length, "", "s"));
}
}
} else {
/* PDU is fragmented and this isn't the first fragment */
if (check_col(pinfo->cinfo, COL_INFO)) {
col_append_fstr(pinfo->cinfo, COL_INFO,
" [DCE/RPC fragment]");
}
if (dcerpc_tree) {
if (length > 0) {
proto_tree_add_text (dcerpc_tree, tvb, offset, length,
"Fragment data (%d byte%s)", length,
plurality(length, "", "s"));
}
}
}
} else {
/* Reassembly is enabled, the PDU is fragmented, and
we have all the data in the fragment; the first two
of those mean we should attempt reassembly, and the
third means we can attempt reassembly. */
if (dcerpc_tree) {
if (length > 0) {
proto_tree_add_text (dcerpc_tree, tvb, offset, length,
"Fragment data (%d byte%s)", length,
plurality(length, "", "s"));
}
}
if(hdr->flags&PFC_FIRST_FRAG){ /* FIRST fragment */
if( (!pinfo->fd->flags.visited) && value->rep_frame ){
fragment_add(tvb, offset, pinfo, value->rep_frame,
dcerpc_co_reassemble_table,
0,
length,
TRUE);
fragment_set_tot_len(pinfo, value->rep_frame,
dcerpc_co_reassemble_table, alloc_hint);
}
if (check_col(pinfo->cinfo, COL_INFO)) {
col_append_fstr(pinfo->cinfo, COL_INFO,
" [DCE/RPC fragment]");
}
} else if(hdr->flags&PFC_LAST_FRAG){ /* LAST fragment */
if( value->rep_frame ){
fragment_data *fd_head;
guint32 tot_len;
tot_len = fragment_get_tot_len(pinfo, value->rep_frame,
dcerpc_co_reassemble_table);
fd_head = fragment_add(tvb, offset, pinfo,
value->rep_frame,
dcerpc_co_reassemble_table,
tot_len-alloc_hint,
length,
TRUE);
if(fd_head){
/* We completed reassembly */
tvbuff_t *next_tvb;
next_tvb = tvb_new_real_data(fd_head->data, fd_head->datalen, fd_head->datalen);
tvb_set_child_real_data_tvbuff(tvb, next_tvb);
add_new_data_source(pinfo, next_tvb, "Reassembled DCE/RPC");
show_fragment_tree(fd_head, &dcerpc_frag_items,
dcerpc_tree, pinfo, next_tvb);
/*
* XXX - should there be a third routine for each
* function in an RPC subdissector, to handle
* fault responses? The DCE RPC 1.1 spec says
* three's "stub data" here, which I infer means
* that it's protocol-specific and call-specific.
*
* It should probably get passed the status code
* as well, as that might be protocol-specific.
*/
if (dcerpc_tree) {
if (length > 0) {
proto_tree_add_text (dcerpc_tree, tvb, offset, length,
"Fault stub data (%d byte%s)", length,
plurality(length, "", "s"));
}
}
} else {
/* Reassembly not complete - some fragments
are missing */
if (check_col(pinfo->cinfo, COL_INFO)) {
col_append_fstr(pinfo->cinfo, COL_INFO,
" [DCE/RPC fragment]");
}
}
}
} else { /* 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_co_reassemble_table);
fragment_add(tvb, offset, pinfo, value->rep_frame,
dcerpc_co_reassemble_table,
tot_len-alloc_hint,
length,
TRUE);
}
if (check_col(pinfo->cinfo, COL_INFO)) {
col_append_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_add_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 (check_col (pinfo->cinfo, COL_INFO))
col_append_fstr (pinfo->cinfo, COL_INFO, ": call_id: %u", hdr.call_id);
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_object, 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_dne, 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_reserved, 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_last_frag, tvb, offset, 1, hdr.flags);
proto_tree_add_boolean (cn_flags_tree, hf_dcerpc_cn_flags_first_frag, 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;
case PDU_FAULT:
dissect_dcerpc_cn_fault (tvb, pinfo, dcerpc_tree, &hdr);
break;
case PDU_BIND_NAK:
dissect_dcerpc_cn_bind_nak (tvb, pinfo, dcerpc_tree, &hdr);
break;
case PDU_CO_CANCEL:
case PDU_ORPHANED:
/*
* Nothing after the common header other than an authentication
* verifier.
*/
dissect_dcerpc_cn_auth (tvb, pinfo, dcerpc_tree, &hdr, NULL);
break;
case PDU_SHUTDOWN:
/*
* Nothing after the common header, not even an authentication
* verifier.
*/
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, int offset, proto_tree *dcerpc_tree,
e_dce_dg_common_hdr_t *hdr, int *auth_level_p)
{
proto_item *ti = NULL;
proto_tree *auth_tree = NULL;
guint8 protection_level;
/*
* Initially set "*auth_level_p" to -1 to indicate that we haven't
* yet seen any authentication level information.
*/
if (auth_level_p != NULL)
*auth_level_p = -1;
/*
* The authentication information is at the *end* of the PDU; in
* request and response PDUs, the request and response stub data
* come before it.
*
* If the full packet is here, and there's data past the end of the
* packet body, then dissect the auth info.
*/
offset += hdr->frag_len;
if (tvb_length_remaining(tvb, offset) > 0) {
switch (hdr->auth_proto) {
case DCE_C_RPC_AUTHN_PROTOCOL_KRB5:
ti = proto_tree_add_text (dcerpc_tree, tvb, offset, -1, "Kerberos authentication verifier");
auth_tree = proto_item_add_subtree (ti, ett_decrpc_krb5_auth_verf);
protection_level = tvb_get_guint8 (tvb, offset);
if (auth_level_p != NULL)
*auth_level_p = protection_level;
proto_tree_add_uint (auth_tree, hf_dcerpc_krb5_av_prot_level, tvb, offset, 1, protection_level);
offset++;
proto_tree_add_item (auth_tree, hf_dcerpc_krb5_av_key_vers_num, tvb, offset, 1, FALSE);
offset++;
if (protection_level == DCE_C_AUTHN_LEVEL_PKT_PRIVACY)
offset += 6; /* 6 bytes of padding */
else
offset += 2; /* 6 bytes of padding */
proto_tree_add_item (auth_tree, hf_dcerpc_krb5_av_key_auth_verifier, tvb, offset, 16, FALSE);
offset += 16;
break;
default:
proto_tree_add_text (dcerpc_tree, tvb, offset, -1, "Authentication verifier");
break;
}
}
}
static void
dissect_dcerpc_dg_cancel_ack (tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *dcerpc_tree,
e_dce_dg_common_hdr_t *hdr)
{
guint32 version;
offset = dissect_dcerpc_uint32 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_dg_cancel_vers,
&version);
switch (version) {
case 0:
/* The only version we know about */
offset = dissect_dcerpc_uint32 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_dg_cancel_id,
NULL);
offset = dissect_dcerpc_uint8 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_dg_server_accepting_cancels,
NULL);
break;
}
}
static void
dissect_dcerpc_dg_cancel (tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *dcerpc_tree,
e_dce_dg_common_hdr_t *hdr)
{
guint32 version;
offset = dissect_dcerpc_uint32 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_dg_cancel_vers,
&version);
switch (version) {
case 0:
/* The only version we know about */
offset = dissect_dcerpc_uint32 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_dg_cancel_id,
NULL);
/* XXX - are NDR booleans 32 bits? */
offset = dissect_dcerpc_uint32 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_dg_server_accepting_cancels,
NULL);
break;
}
}
static void
dissect_dcerpc_dg_fack (tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *dcerpc_tree,
e_dce_dg_common_hdr_t *hdr)
{
guint8 version;
guint16 serial_num;
guint16 selack_len;
guint i;
offset = dissect_dcerpc_uint8 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_dg_fack_vers,
&version);
/* padding */
offset++;
switch (version) {
case 0: /* The only version documented in the DCE RPC 1.1 spec */
case 1: /* This appears to be the same */
offset = dissect_dcerpc_uint16 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_dg_fack_window_size,
NULL);
offset = dissect_dcerpc_uint32 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_dg_fack_max_tsdu,
NULL);
offset = dissect_dcerpc_uint32 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_dg_fack_max_frag_size,
NULL);
offset = dissect_dcerpc_uint16 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_dg_fack_serial_num,
&serial_num);
if (check_col (pinfo->cinfo, COL_INFO)) {
col_append_fstr (pinfo->cinfo, COL_INFO, " serial_num: %u",
serial_num);
}
offset = dissect_dcerpc_uint16 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_dg_fack_selack_len,
&selack_len);
for (i = 0; i < selack_len; i++) {
offset = dissect_dcerpc_uint32 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_dg_fack_selack,
NULL);
}
break;
}
}
static void
dissect_dcerpc_dg_reject_fault (tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *dcerpc_tree,
e_dce_dg_common_hdr_t *hdr)
{
guint32 status;
offset = dissect_dcerpc_uint32 (tvb, offset, pinfo, dcerpc_tree,
hdr->drep, hf_dcerpc_dg_status,
&status);
if (check_col (pinfo->cinfo, COL_INFO)) {
col_append_fstr (pinfo->cinfo, COL_INFO,
": status: %s",
val_to_str(status, reject_status_vals, "Unknown (0x%08x)"));
}
}
static void
dissect_dcerpc_dg_stub (tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *dcerpc_tree, proto_tree *tree,
e_dce_dg_common_hdr_t *hdr, dcerpc_info *di)
{
int length, reported_length, stub_length;
gboolean save_fragmented;
fragment_data *fd_head;
if (check_col (pinfo->cinfo, COL_INFO)) {
col_append_fstr (pinfo->cinfo, COL_INFO, " opnum: %u",
di->call_data->opnum);
}
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;
save_fragmented = pinfo->fragmented;
/* If we don't have reassembly enabled, or this packet contains
the entire PDU, or if this is a short frame (or a frame
not reassembled at a lower layer) that doesn't include all
the data in the fragment, just call the handoff directly if
this is the first fragment or the PDU isn't fragmented. */
if( (!dcerpc_reassemble) || !(hdr->flags1 & PFCL1_FRAG) ||
stub_length > length ) {
if(hdr->frag_num == 0) {
/* First fragment, possibly the only fragment */
/*
* XXX - authentication level?
*/
pinfo->fragmented = (hdr->flags1 & PFCL1_FRAG);
dcerpc_try_handoff (pinfo, tree, dcerpc_tree,
tvb_new_subset (tvb, offset, length,
reported_length),
0, hdr->drep, di, 0);
} else {
/* PDU is fragmented and this isn't the first fragment */
if (check_col(pinfo->cinfo, COL_INFO)) {
col_append_fstr(pinfo->cinfo, COL_INFO, " [DCE/RPC fragment]");
}
if (dcerpc_tree) {
if (length > 0) {
proto_tree_add_text (dcerpc_tree, tvb, offset, length,
"Fragment data (%d byte%s)", length,
plurality(length, "", "s"));
}
}
}
} else {
/* Reassembly is enabled, the PDU is fragmented, and
we have all the data in the fragment; the first two
of those mean we should attempt reassembly, and the
third means we can attempt reassembly. */
if (dcerpc_tree) {
if (length > 0) {
proto_tree_add_text (dcerpc_tree, tvb, offset, length,
"Fragment data (%d byte%s)", length,
plurality(length, "", "s"));
}
}
fd_head = fragment_add_seq(tvb, offset, pinfo,
hdr->seqnum, dcerpc_cl_reassemble_table,
hdr->frag_num, length, !(hdr->flags1 & PFCL1_LASTFRAG));
if (fd_head != NULL) {
/* We completed reassembly */
tvbuff_t *next_tvb;
next_tvb = tvb_new_real_data(fd_head->data, fd_head->len, fd_head->len);
tvb_set_child_real_data_tvbuff(tvb, next_tvb);
add_new_data_source(pinfo, next_tvb, "Reassembled DCE/RPC");
show_fragment_seq_tree(fd_head, &dcerpc_frag_items,
dcerpc_tree, pinfo, next_tvb);
/*
* XXX - authentication level?
*/
pinfo->fragmented = FALSE;
dcerpc_try_handoff (pinfo, tree, dcerpc_tree, next_tvb,
0, hdr->drep, di, 0);
} else {
/* Reassembly isn't completed yet */
if (check_col(pinfo->cinfo, COL_INFO)) {
col_append_fstr(pinfo->cinfo, COL_INFO, " [DCE/RPC fragment]");
}
}
}
pinfo->fragmented = save_fragmented;
}
static void
dissect_dcerpc_dg_rqst (tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *dcerpc_tree, proto_tree *tree,
e_dce_dg_common_hdr_t *hdr, conversation_t *conv)
{
dcerpc_info di;
dcerpc_call_value *value, v;
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->req_time.secs=pinfo->fd->abs_secs;
call_value->req_time.nsecs=pinfo->fd->abs_usecs*1000;
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;
}
di.conv = conv;
di.call_id = hdr->seqnum;
di.smb_fid = -1;
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);
}
dissect_dcerpc_dg_stub (tvb, offset, pinfo, dcerpc_tree, tree, hdr, &di);
}
static void
dissect_dcerpc_dg_resp (tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *dcerpc_tree, proto_tree *tree,
e_dce_dg_common_hdr_t *hdr, conversation_t *conv)
{
dcerpc_info di;
dcerpc_call_value *value, v;
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;
}
di.conv = conv;
di.call_id = 0;
di.smb_fid = -1;
di.request = FALSE;
di.call_data = value;
if(value->req_frame!=0){
nstime_t ns;
proto_tree_add_uint(dcerpc_tree, hf_dcerpc_request_in,
tvb, 0, 0, value->req_frame);
ns.secs= pinfo->fd->abs_secs-value->req_time.secs;
ns.nsecs=pinfo->fd->abs_usecs*1000-value->req_time.nsecs;
if(ns.nsecs<0){
ns.nsecs+=1000000000;
ns.secs--;
}
proto_tree_add_time(dcerpc_tree, hf_dcerpc_time, tvb, offset, 0, &ns);
}
dissect_dcerpc_dg_stub (tvb, offset, pinfo, dcerpc_tree, tree, hdr, &di);
}
/*
* 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;
int auth_level;
/*
* 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_add_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;
if (tree)
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_ver, tvb, offset, 1, hdr.rpc_ver);
offset++;
if (tree)
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_packet_type, tvb, offset, 1, hdr.ptype);
offset++;
if (tree) {
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_80, 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_idempotent, 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_nofack, 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_last_frag, tvb, offset, 1, hdr.flags1);
proto_tree_add_boolean (dg_flags1_tree, hf_dcerpc_dg_flags1_rsrvd_01, tvb, offset, 1, hdr.flags1);
}
}
offset++;
if (tree) {
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_80, 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_20, 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_08, 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_cancel_pending, tvb, offset, 1, hdr.flags2);
proto_tree_add_boolean (dg_flags2_tree, hf_dcerpc_dg_flags2_rsrvd_01, tvb, offset, 1, hdr.flags2);
}
}
offset++;
if (tree) {
tf = proto_tree_add_bytes (dcerpc_tree, hf_dcerpc_drep, tvb, offset, sizeof (hdr.drep), hdr.drep);
drep_tree = proto_item_add_subtree (tf, ett_dcerpc_drep);
if (drep_tree) {
proto_tree_add_uint(drep_tree, hf_dcerpc_drep_byteorder, tvb, offset, 1, hdr.drep[0] >> 4);
proto_tree_add_uint(drep_tree, hf_dcerpc_drep_character, tvb, offset, 1, hdr.drep[0] & 0x0f);
proto_tree_add_uint(drep_tree, hf_dcerpc_drep_fp, tvb, offset+1, 1, hdr.drep[1]);
}
}
offset += sizeof (hdr.drep);
if (tree)
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_serial_hi, tvb, offset, 1, hdr.serial_hi);
offset++;
if (tree) {
proto_tree_add_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;
if (tree) {
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;
if (tree) {
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;
if (tree)
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_server_boot, tvb, offset, 4, hdr.server_boot);
offset += 4;
if (tree)
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_if_ver, tvb, offset, 4, hdr.if_ver);
offset += 4;
if (tree)
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_seqnum, tvb, offset, 4, hdr.seqnum);
if (check_col (pinfo->cinfo, COL_INFO)) {
col_append_fstr (pinfo->cinfo, COL_INFO, ": seq_num: %u", hdr.seqnum);
}
offset += 4;
if (tree)
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_opnum, tvb, offset, 2, hdr.opnum);
offset += 2;
if (tree)
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_ihint, tvb, offset, 2, hdr.ihint);
offset += 2;
if (tree)
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_ahint, tvb, offset, 2, hdr.ahint);
offset += 2;
if (tree)
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_frag_len, tvb, offset, 2, hdr.frag_len);
offset += 2;
if (tree)
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_frag_num, tvb, offset, 2, hdr.frag_num);
if (check_col (pinfo->cinfo, COL_INFO)) {
if (hdr.flags1 & PFCL1_FRAG) {
/* Fragmented - put the fragment number into the Info column */
col_append_fstr (pinfo->cinfo, COL_INFO, " frag_num: %u",
hdr.frag_num);
}
}
offset += 2;
if (tree)
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_auth_proto, tvb, offset, 1, hdr.auth_proto);
offset++;
if (tree)
proto_tree_add_uint (dcerpc_tree, hf_dcerpc_dg_serial_lo, tvb, offset, 1, hdr.serial_lo);
if (check_col (pinfo->cinfo, COL_INFO)) {
if (hdr.flags1 & PFCL1_FRAG) {
/* Fragmented - put the serial number into the Info column */
col_append_fstr (pinfo->cinfo, COL_INFO, " serial_num: %u",
(hdr.serial_hi << 8) | hdr.serial_lo);
}
}
offset++;
if (tree) {
/*
* XXX - for Kerberos, we get a protection level; if it's
* DCE_C_AUTHN_LEVEL_PKT_PRIVACY, we can't dissect the
* stub data.
*/
dissect_dcerpc_dg_auth (tvb, offset, dcerpc_tree, &hdr,
&auth_level);
}
/*
* keeping track of the conversation shouldn't really be necessary
* for connectionless packets, because everything we need to know
* to dissect is in the header for each packet. Unfortunately,
* Microsoft's implementation is buggy and often puts the
* completely wrong if_id in the header. go figure. So, keep
* track of the seqnum and use that if possible. Note: that's not
* completely correct. It should really be done based on both the
* activity_id and seqnum. I haven't seen anywhere that it would
* make a difference, but for future reference...
*/
conv = find_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) {
case PDU_CANCEL_ACK:
/* Body is optional */
/* XXX - we assume "frag_len" is the length of the body */
if (hdr.frag_len != 0)
dissect_dcerpc_dg_cancel_ack (tvb, offset, pinfo, dcerpc_tree, &hdr);
break;
case PDU_CL_CANCEL:
/*
* XXX - The DCE RPC 1.1 spec doesn't say the body is optional,
* but in at least one capture none of the Cl_cancel PDUs had a
* body.
*/
/* XXX - we assume "frag_len" is the length of the body */
if (hdr.frag_len != 0)
dissect_dcerpc_dg_cancel (tvb, offset, pinfo, dcerpc_tree, &hdr);
break;
case PDU_NOCALL:
/* Body is optional; if present, it's the same as PDU_FACK */
/* XXX - we assume "frag_len" is the length of the body */
if (hdr.frag_len != 0)
dissect_dcerpc_dg_fack (tvb, offset, pinfo, dcerpc_tree, &hdr);
break;
case PDU_FACK:
dissect_dcerpc_dg_fack (tvb, offset, pinfo, dcerpc_tree, &hdr);
break;
case PDU_REJECT:
case PDU_FAULT:
dissect_dcerpc_dg_reject_fault (tvb, offset, pinfo, dcerpc_tree, &hdr);
break;
case PDU_REQ:
dissect_dcerpc_dg_rqst (tvb, offset, pinfo, dcerpc_tree, tree, &hdr, conv);
break;
case PDU_RESP:
dissect_dcerpc_dg_resp (tvb, offset, pinfo, dcerpc_tree, tree, &hdr, conv);
break;
/* these requests have no body */
case PDU_ACK:
case PDU_PING:
case PDU_WORKING:
default:
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_DEC, 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), PFC_FIRST_FRAG, "", HFILL }},
{ &hf_dcerpc_cn_flags_last_frag,
{ "Last Frag", "dcerpc.cn_flags.last_frag", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFC_LAST_FRAG, "", HFILL }},
{ &hf_dcerpc_cn_flags_cancel_pending,
{ "Cancel Pending", "dcerpc.cn_flags.cancel_pending", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFC_PENDING_CANCEL, "", HFILL }},
{ &hf_dcerpc_cn_flags_reserved,
{ "Reserved", "dcerpc.cn_flags.reserved", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFC_RESERVED_1, "", HFILL }},
{ &hf_dcerpc_cn_flags_mpx,
{ "Multiplex", "dcerpc.cn_flags.mpx", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFC_CONC_MPX, "", HFILL }},
{ &hf_dcerpc_cn_flags_dne,
{ "Did Not Execute", "dcerpc.cn_flags.dne", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFC_DID_NOT_EXECUTE, "", HFILL }},
{ &hf_dcerpc_cn_flags_maybe,
{ "Maybe", "dcerpc.cn_flags.maybe", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFC_MAYBE, "", HFILL }},
{ &hf_dcerpc_cn_flags_object,
{ "Object", "dcerpc.cn_flags.object", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFC_OBJECT_UUID, "", 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, VALS(p_cont_result_vals), 0x0, "", HFILL }},
{ &hf_dcerpc_cn_ack_reason,
{ "Ack reason", "dcerpc.cn_ack_reason", FT_UINT16, BASE_DEC, VALS(p_provider_reason_vals), 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_reject_reason,
{ "Reject reason", "dcerpc.cn_reject_reason", FT_UINT16, BASE_DEC, VALS(reject_reason_vals), 0x0, "", HFILL }},
{ &hf_dcerpc_cn_num_protocols,
{ "Number of protocols", "dcerpc.cn_num_protocols", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
{ &hf_dcerpc_cn_protocol_ver_major,
{ "Protocol major version", "dcerpc.cn_protocol_ver_major", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
{ &hf_dcerpc_cn_protocol_ver_minor,
{ "Protocol minor version", "dcerpc.cn_protocol_ver_minor", FT_UINT8, 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_cn_status,
{ "Status", "dcerpc.cn_status", FT_UINT32, BASE_HEX, VALS(reject_status_vals), 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), PFCL1_RESERVED_01, "", HFILL }},
{ &hf_dcerpc_dg_flags1_last_frag,
{ "Last Fragment", "dcerpc.dg_flags1_last_frag", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFCL1_LASTFRAG, "", HFILL }},
{ &hf_dcerpc_dg_flags1_frag,
{ "Fragment", "dcerpc.dg_flags1_frag", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFCL1_FRAG, "", HFILL }},
{ &hf_dcerpc_dg_flags1_nofack,
{ "No Fack", "dcerpc.dg_flags1_nofack", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFCL1_NOFACK, "", HFILL }},
{ &hf_dcerpc_dg_flags1_maybe,
{ "Maybe", "dcerpc.dg_flags1_maybe", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFCL1_MAYBE, "", HFILL }},
{ &hf_dcerpc_dg_flags1_idempotent,
{ "Idempotent", "dcerpc.dg_flags1_idempotent", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFCL1_IDEMPOTENT, "", HFILL }},
{ &hf_dcerpc_dg_flags1_broadcast,
{ "Broadcast", "dcerpc.dg_flags1_broadcast", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFCL1_BROADCAST, "", HFILL }},
{ &hf_dcerpc_dg_flags1_rsrvd_80,
{ "Reserved", "dcerpc.dg_flags1_rsrvd_80", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFCL1_RESERVED_80, "", 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), PFCL2_RESERVED_01, "", HFILL }},
{ &hf_dcerpc_dg_flags2_cancel_pending,
{ "Cancel Pending", "dcerpc.dg_flags2_cancel_pending", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFCL2_CANCEL_PENDING, "", HFILL }},
{ &hf_dcerpc_dg_flags2_rsrvd_04,
{ "Reserved", "dcerpc.dg_flags2_rsrvd_04", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFCL2_RESERVED_04, "", HFILL }},
{ &hf_dcerpc_dg_flags2_rsrvd_08,
{ "Reserved", "dcerpc.dg_flags2_rsrvd_08", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFCL2_RESERVED_08, "", HFILL }},
{ &hf_dcerpc_dg_flags2_rsrvd_10,
{ "Reserved", "dcerpc.dg_flags2_rsrvd_10", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFCL2_RESERVED_10, "", HFILL }},
{ &hf_dcerpc_dg_flags2_rsrvd_20,
{ "Reserved", "dcerpc.dg_flags2_rsrvd_20", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFCL2_RESERVED_20, "", HFILL }},
{ &hf_dcerpc_dg_flags2_rsrvd_40,
{ "Reserved", "dcerpc.dg_flags2_rsrvd_40", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFCL2_RESERVED_40, "", HFILL }},
{ &hf_dcerpc_dg_flags2_rsrvd_80,
{ "Reserved", "dcerpc.dg_flags2_rsrvd_80", FT_BOOLEAN, 8, TFS (&flags_set_truth), PFCL2_RESERVED_80, "", 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_DEC, 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_krb5_av_prot_level,
{ "Protection Level", "dcerpc.krb5_av.prot_level", FT_UINT8, BASE_DEC, VALS(authn_level_vals), 0x0, "", HFILL }},
{ &hf_dcerpc_krb5_av_key_vers_num,
{ "Key Version Number", "dcerpc.krb5_av.key_vers_num", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
{ &hf_dcerpc_krb5_av_key_auth_verifier,
{ "Authentication Verifier", "dcerpc.krb5_av.auth_verifier", FT_BYTES, BASE_NONE, 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_dg_cancel_vers,
{ "Cancel Version", "dcerpc.dg_cancel_vers", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
{ &hf_dcerpc_dg_cancel_id,
{ "Cancel ID", "dcerpc.dg_cancel_id", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
{ &hf_dcerpc_dg_server_accepting_cancels,
{ "Server accepting cancels", "dcerpc.server_accepting_cancels", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "", HFILL }},
{ &hf_dcerpc_dg_fack_vers,
{ "FACK Version", "dcerpc.fack_vers", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
{ &hf_dcerpc_dg_fack_window_size,
{ "Window Size", "dcerpc.fack_window size", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
{ &hf_dcerpc_dg_fack_max_tsdu,
{ "Max TSDU", "dcerpc.fack_max_tsdu", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
{ &hf_dcerpc_dg_fack_max_frag_size,
{ "Max Frag Size", "dcerpc.fack_max_frag_size", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
{ &hf_dcerpc_dg_fack_serial_num,
{ "Serial Num", "dcerpc.fack_serial_num", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
{ &hf_dcerpc_dg_fack_selack_len,
{ "Selective ACK Len", "dcerpc.fack_selack_len", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
{ &hf_dcerpc_dg_fack_selack,
{ "Selective ACK", "dcerpc.fack_selack", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL }},
{ &hf_dcerpc_dg_status,
{ "Status", "dcerpc.dg_status", FT_UINT32, BASE_HEX, VALS(reject_status_vals), 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 }},
{ &hf_dcerpc_time,
{ "Time from request", "dcerpc.time", FT_RELATIVE_TIME, BASE_NONE, NULL, 0, "Time between Request and Reply for DCE-RPC calls", 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,
&ett_decrpc_krb5_auth_verf,
};
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);
ntlmssp_handle = find_dissector("ntlmssp");
gssapi_handle = find_dissector("gssapi");
}
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