forked from osmocom/wireshark
f37686bc6f
I'm pretty sure that it won't be used uninitialised, and that the code could be more clearly arranged to make this obvious to the compiler too. svn path=/trunk/; revision=25685
269 lines
6.9 KiB
C
269 lines
6.9 KiB
C
/* packet-ipsi-ctl.c
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* Routines for Avaya IPSI Control packet disassembly
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* Traffic is encapsulated Avaya proprietary CCMS
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* (Control Channel Message Set) between PCD and SIM
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*
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* Copyright 2008, Randy McEoin <rmceoin@ahbelo.com>
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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#define IPSICTL_PORT 5010
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#define IPSICTL_PDU_MAGIC 0x0300
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static int proto_ipsictl = -1;
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static int hf_ipsictl_pdu = -1;
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static int hf_ipsictl_magic = -1;
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static int hf_ipsictl_length = -1;
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static int hf_ipsictl_type = -1;
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static int hf_ipsictl_sequence = -1;
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static int hf_ipsictl_field1 = -1;
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static int hf_ipsictl_data = -1;
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static gint ett_ipsictl = -1;
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static gint ett_ipsictl_pdu = -1;
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static void dissect_ipsictl(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_tree *ipsictl_tree = NULL;
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proto_tree *pdu_tree = NULL;
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proto_item *ti;
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int offset = 0;
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int loffset = 0;
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int llength = 0;
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int remaining_length;
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guint16 magic;
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guint16 length;
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guint16 type=0;
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guint16 sequence=0;
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int first_sequence=-1;
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int last_sequence=-1;
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guint16 field1=0;
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guint16 pdu=0;
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int haspdus=0;
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const guint8 *data;
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remaining_length=tvb_reported_length_remaining(tvb, offset);
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if (tree) {
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ti = proto_tree_add_item(tree, proto_ipsictl, tvb, offset, remaining_length, FALSE);
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ipsictl_tree = proto_item_add_subtree(ti, ett_ipsictl);
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}
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magic = tvb_get_ntohs(tvb, offset);
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if (magic == IPSICTL_PDU_MAGIC)
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{
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haspdus=1;
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}
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while (haspdus &&
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((remaining_length=tvb_reported_length_remaining(tvb, offset)) > 6))
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{
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loffset = offset;
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magic = tvb_get_ntohs(tvb, loffset); loffset+=2;
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length = tvb_get_ntohs(tvb, loffset); loffset+=2;
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llength=length;
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remaining_length-=4;
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if (remaining_length>=2)
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{
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type = tvb_get_ntohs(tvb, loffset); loffset+=2;
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remaining_length-=2;
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llength-=2;
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}
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if (remaining_length>=2)
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{
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sequence = tvb_get_ntohs(tvb, loffset); loffset+=2;
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remaining_length-=2;
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llength-=2;
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if (first_sequence==-1)
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{
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first_sequence=sequence;
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}else{
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last_sequence=sequence;
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}
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}
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if (remaining_length>=2)
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{
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field1 = tvb_get_ntohs(tvb, loffset); loffset+=2;
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remaining_length-=2;
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llength-=2;
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}
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data = tvb_get_ptr(tvb, loffset, remaining_length);
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if (tree) {
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ti = proto_tree_add_uint_format(ipsictl_tree, hf_ipsictl_pdu, tvb,
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offset, (length+4), pdu,
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"PDU: %d", pdu);
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pdu_tree = proto_item_add_subtree(ti, ett_ipsictl_pdu);
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}
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loffset=offset;
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remaining_length=tvb_reported_length_remaining(tvb, offset);
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if (tree) {
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proto_tree_add_uint(pdu_tree, hf_ipsictl_magic, tvb, loffset, 2, magic);
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}
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loffset+=2; remaining_length-=2;
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if (tree) {
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proto_tree_add_uint(pdu_tree, hf_ipsictl_length, tvb, loffset, 2, length);
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}
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loffset+=2; remaining_length-=2;
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if (remaining_length>=2)
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{
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if (tree) {
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proto_tree_add_uint(pdu_tree, hf_ipsictl_type, tvb, loffset, 2, type);
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}
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loffset+=2; remaining_length-=2;
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}
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if (remaining_length>=2)
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{
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if (tree) {
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proto_tree_add_uint(pdu_tree, hf_ipsictl_sequence, tvb, loffset, 2, sequence);
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}
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loffset+=2; remaining_length-=2;
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}
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if (remaining_length>=2)
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{
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if (tree) {
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proto_tree_add_uint(pdu_tree, hf_ipsictl_field1, tvb, loffset, 2, field1);
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}
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loffset+=2; remaining_length-=2;
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}
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if (remaining_length>=2)
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{
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if (tree) {
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proto_tree_add_bytes(pdu_tree, hf_ipsictl_data, tvb, loffset, llength, data);
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}
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loffset+=llength; remaining_length-=llength;
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}
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offset=loffset;
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pdu++;
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}
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if (!haspdus)
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{
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data = tvb_get_ptr(tvb, offset, remaining_length);
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if (tree) {
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proto_tree_add_bytes(ipsictl_tree, hf_ipsictl_data, tvb, offset, -1, data);
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}
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}
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if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "IPSICTL");
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}
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if (haspdus)
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{
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if (check_col(pinfo->cinfo, COL_INFO)) {
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if (last_sequence==-1)
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{
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col_add_fstr(pinfo->cinfo, COL_INFO, "PDUS=%d, Seq=0x%04x",
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pdu,first_sequence);
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}else{
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col_add_fstr(pinfo->cinfo, COL_INFO, "PDUS=%d, Seq=0x%04x-0x%04x",
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pdu,first_sequence,last_sequence);
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}
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}
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}else{
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_add_str(pinfo->cinfo, COL_INFO, "Initialization");
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}
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}
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} /* dissect_ipsictl */
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void proto_register_ipsictl(void)
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{
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static hf_register_info hf[] = {
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{ &hf_ipsictl_pdu,
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{ "PDU", "ipsictl.pdu",
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FT_UINT16, BASE_HEX, NULL, 0x0,
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"IPSICTL PDU", HFILL }},
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{ &hf_ipsictl_magic,
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{ "Magic", "ipsictl.magic",
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FT_UINT16, BASE_HEX, NULL, 0x0,
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"IPSICTL Magic", HFILL }},
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{ &hf_ipsictl_length,
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{ "Length", "ipsictl.length",
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FT_UINT16, BASE_HEX, NULL, 0x0,
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"IPSICTL Length", HFILL }},
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{ &hf_ipsictl_type,
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{ "Type", "ipsictl.type",
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FT_UINT16, BASE_HEX, NULL, 0x0,
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"IPSICTL Type", HFILL }},
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{ &hf_ipsictl_sequence,
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{ "Sequence", "ipsictl.sequence",
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FT_UINT16, BASE_HEX, NULL, 0x0,
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"IPSICTL Sequence", HFILL }},
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{ &hf_ipsictl_field1,
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{ "Field1", "ipsictl.field1",
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FT_UINT16, BASE_HEX, NULL, 0x0,
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"IPSICTL Field1", HFILL }},
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{ &hf_ipsictl_data,
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{ "Data", "ipsictl.data",
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FT_BYTES, BASE_HEX, NULL, 0x0,
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"IPSICTL data", HFILL }},
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};
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static gint *ett[] = {
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&ett_ipsictl,
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&ett_ipsictl_pdu
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};
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proto_ipsictl = proto_register_protocol("IPSICTL", "IPSICTL", "ipsictl");
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proto_register_field_array(proto_ipsictl, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void proto_reg_handoff_ipsictl(void)
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{
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dissector_handle_t ipsictl_handle = NULL;
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ipsictl_handle = create_dissector_handle(dissect_ipsictl, proto_ipsictl);
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dissector_add("tcp.port", IPSICTL_PORT, ipsictl_handle);
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}
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