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wireshark/asn1/sabp/packet-sabp-template.c
Anders Broman fcead8afd0 Fix bug http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=1809 
"UTRAN Iub interface SABP signalling"
The text for this protocol is little misleading. It should preferable be
changed to.
"UTRAN IuBC interface SABP signaling"

Add TCP reassembly and dissect Data-Coding-Scheme.

svn path=/trunk/; revision=24701
2008-03-19 19:13:47 +00:00

222 lines
7.2 KiB
C
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/* packet-sbap.c
* Routines for UTRAN Iu-BC Interface: Service Area Broadcast Protocol (SBAP) packet dissection
* Copyright 2007, Tomas Kukosa <tomas.kukosa@siemens.com>
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* 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.
*
* Ref: 3GPP TS 25.419 version 7.7.0 (2006-03)
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glib.h>
#include <epan/packet.h>
#include <epan/conversation.h>
#include <stdio.h>
#include <string.h>
#include <epan/asn1.h>
#include <epan/emem.h>
#include "packet-tcp.h"
#include "packet-per.h"
#include "packet-e212.h"
#include "packet-gsm_map.h"
#ifdef _MSC_VER
/* disable: "warning C4146: unary minus operator applied to unsigned type, result still unsigned" */
#pragma warning(disable:4146)
#endif
#define PNAME "UTRAN IuBC interface SABP signaling"
#define PSNAME "SABP"
#define PFNAME "sabp"
#include "packet-sabp-val.h"
static dissector_handle_t sabp_handle = NULL;
static dissector_handle_t sabp_tcp_handle = NULL;
/* Initialize the protocol and registered fields */
static int proto_sabp = -1;
#include "packet-sabp-hf.c"
/* Initialize the subtree pointers */
static int ett_sabp = -1;
static int ett_sabp_e212 = -1;
static int ett_sabp_cbs_data_coding = -1;;
#include "packet-sabp-ett.c"
/* Global variables */
static guint32 ProcedureCode;
static guint32 ProtocolIE_ID;
static guint32 ProtocolExtensionID;
static guint8 sms_encoding;
/* desegmentation of sabp over TCP */
static gboolean gbl_sabp_desegment = TRUE;
/* Dissector tables */
static dissector_table_t sabp_ies_dissector_table;
static dissector_table_t sabp_extension_dissector_table;
static dissector_table_t sabp_proc_imsg_dissector_table;
static dissector_table_t sabp_proc_sout_dissector_table;
static dissector_table_t sabp_proc_uout_dissector_table;
static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
#include "packet-sabp-fn.c"
static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
return (dissector_try_port(sabp_ies_dissector_table, ProtocolIE_ID, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
}
static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
return (dissector_try_port(sabp_extension_dissector_table, ProtocolExtensionID, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
}
static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
return (dissector_try_port(sabp_proc_imsg_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
}
static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
return (dissector_try_port(sabp_proc_sout_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
}
static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
return (dissector_try_port(sabp_proc_uout_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
}
static guint
get_sabp_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset)
{
guint32 type_length;
int bit_offset;
asn1_ctx_t asn1_ctx;
asn1_ctx_init(&asn1_ctx, ASN1_ENC_PER, TRUE, pinfo);
/* Length should be in the 3:d octet */
offset = offset + 3;
bit_offset = offset<<3;
/* Get the length of the sabp packet. offset in bits */
offset = dissect_per_length_determinant(tvb, bit_offset, &asn1_ctx, NULL, -1, &type_length);
/* return the remaining length of the PDU */
return type_length+5;
}
static void
dissect_sabp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *sabp_item = NULL;
proto_tree *sabp_tree = NULL;
/* make entry in the Protocol column on summary display */
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, PSNAME);
/* create the sbap protocol tree */
sabp_item = proto_tree_add_item(tree, proto_sabp, tvb, 0, -1, FALSE);
sabp_tree = proto_item_add_subtree(sabp_item, ett_sabp);
dissect_SABP_PDU_PDU(tvb, pinfo, sabp_tree);
}
/* Note a little bit of a hack assumes length max takes two bytes and that lenghth start at byte 4 */
static void
dissect_sabp_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
tcp_dissect_pdus(tvb, pinfo, tree, gbl_sabp_desegment, 5,
get_sabp_pdu_len, dissect_sabp);
}
/*--- proto_register_sbap -------------------------------------------*/
void proto_register_sabp(void) {
/* List of fields */
static hf_register_info hf[] = {
#include "packet-sabp-hfarr.c"
};
/* List of subtrees */
static gint *ett[] = {
&ett_sabp,
&ett_sabp_e212,
&ett_sabp_cbs_data_coding,
#include "packet-sabp-ettarr.c"
};
/* Register protocol */
proto_sabp = proto_register_protocol(PNAME, PSNAME, PFNAME);
/* Register fields and subtrees */
proto_register_field_array(proto_sabp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
/* Register dissector */
register_dissector("sabp", dissect_sabp, proto_sabp);
register_dissector("sabp.tcp", dissect_sabp_tcp, proto_sabp);
sabp_handle = find_dissector("sabp");
sabp_tcp_handle = find_dissector("sabp.tcp");
/* Register dissector tables */
sabp_ies_dissector_table = register_dissector_table("sabp.ies", "SABP-PROTOCOL-IES", FT_UINT32, BASE_DEC);
sabp_extension_dissector_table = register_dissector_table("sabp.extension", "SABP-PROTOCOL-EXTENSION", FT_UINT32, BASE_DEC);
sabp_proc_imsg_dissector_table = register_dissector_table("sabp.proc.imsg", "SABP-ELEMENTARY-PROCEDURE InitiatingMessage", FT_UINT32, BASE_DEC);
sabp_proc_sout_dissector_table = register_dissector_table("sabp.proc.sout", "SABP-ELEMENTARY-PROCEDURE SuccessfulOutcome", FT_UINT32, BASE_DEC);
sabp_proc_uout_dissector_table = register_dissector_table("sabp.proc.uout", "SABP-ELEMENTARY-PROCEDURE UnsuccessfulOutcome", FT_UINT32, BASE_DEC);
}
/*--- proto_reg_handoff_sbap ---------------------------------------*/
void
proto_reg_handoff_sabp(void)
{
#include "packet-sabp-dis-tab.c"
sabp_handle = find_dissector("sabp");
dissector_add("tcp.port", 3452, sabp_tcp_handle);
dissector_add("udp.port", 3452, sabp_handle);
dissector_add_handle("tcp.port", sabp_tcp_handle);
}
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