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/* packet-ipsi-ctl.c
* Routines for Avaya IPSI Control packet disassembly
* Traffic is encapsulated Avaya proprietary CCMS
* (Control Channel Message Set) between PCD and SIM
*
* Copyright 2008, Randy McEoin <rmceoin@ahbelo.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
void proto_register_ipsictl(void);
void proto_reg_handoff_ipsictl(void);
static dissector_handle_t ipsictl_handle = NULL;
#define IPSICTL_PORT 5010 /* Not IANA registered */
#define IPSICTL_PDU_MAGIC 0x0300
static int proto_ipsictl = -1;
static int hf_ipsictl_pdu = -1;
static int hf_ipsictl_magic = -1;
static int hf_ipsictl_length = -1;
static int hf_ipsictl_type = -1;
static int hf_ipsictl_sequence = -1;
static int hf_ipsictl_field1 = -1;
static int hf_ipsictl_data = -1;
static gint ett_ipsictl = -1;
static gint ett_ipsictl_pdu = -1;
static int dissect_ipsictl(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_tree *ipsictl_tree;
proto_tree *pdu_tree;
proto_item *ti;
int offset = 0;
int loffset = 0;
int llength = 0;
int remaining_length;
guint16 magic;
guint16 length;
guint16 type=0;
guint16 sequence=0;
int first_sequence=-1;
int last_sequence=-1;
guint16 field1=0;
guint16 pdu=0;
int haspdus=0;
remaining_length=tvb_reported_length_remaining(tvb, offset);
ti = proto_tree_add_item(tree, proto_ipsictl, tvb, offset, remaining_length, ENC_NA);
ipsictl_tree = proto_item_add_subtree(ti, ett_ipsictl);
magic = tvb_get_ntohs(tvb, offset);
if (magic == IPSICTL_PDU_MAGIC)
{
haspdus=1;
}
while (haspdus &&
((remaining_length=tvb_reported_length_remaining(tvb, offset)) > 6))
{
loffset = offset;
magic = tvb_get_ntohs(tvb, loffset); loffset+=2;
length = tvb_get_ntohs(tvb, loffset); loffset+=2;
llength=length;
remaining_length-=4;
if (remaining_length>=2)
{
type = tvb_get_ntohs(tvb, loffset); loffset+=2;
remaining_length-=2;
llength-=2;
}
if (remaining_length>=2)
{
sequence = tvb_get_ntohs(tvb, loffset); loffset+=2;
remaining_length-=2;
llength-=2;
if (first_sequence==-1)
{
first_sequence=sequence;
}else{
last_sequence=sequence;
}
}
if (remaining_length>=2)
{
field1 = tvb_get_ntohs(tvb, loffset);
llength-=2;
}
ti = proto_tree_add_uint(ipsictl_tree, hf_ipsictl_pdu, tvb,
offset, (length+4), pdu);
pdu_tree = proto_item_add_subtree(ti, ett_ipsictl_pdu);
loffset=offset;
remaining_length=tvb_reported_length_remaining(tvb, offset);
if (tree) {
proto_tree_add_uint(pdu_tree, hf_ipsictl_magic, tvb, loffset, 2, magic);
}
loffset+=2; remaining_length-=2;
if (tree) {
proto_tree_add_uint(pdu_tree, hf_ipsictl_length, tvb, loffset, 2, length);
}
loffset+=2; remaining_length-=2;
if (remaining_length>=2)
{
if (tree) {
proto_tree_add_uint(pdu_tree, hf_ipsictl_type, tvb, loffset, 2, type);
}
loffset+=2; remaining_length-=2;
}
if (remaining_length>=2)
{
if (tree) {
proto_tree_add_uint(pdu_tree, hf_ipsictl_sequence, tvb, loffset, 2, sequence);
}
loffset+=2; remaining_length-=2;
}
if (remaining_length>=2)
{
if (tree) {
proto_tree_add_uint(pdu_tree, hf_ipsictl_field1, tvb, loffset, 2, field1);
}
loffset+=2; remaining_length-=2;
}
if (remaining_length>=2)
{
if (tree) {
proto_tree_add_item(pdu_tree, hf_ipsictl_data, tvb, loffset, llength, ENC_NA);
}
loffset+=llength;
}
offset=loffset;
pdu++;
}
if (!haspdus)
{
proto_tree_add_item(ipsictl_tree, hf_ipsictl_data, tvb, offset, -1, ENC_NA);
}
col_set_str(pinfo->cinfo, COL_PROTOCOL, "IPSICTL");
if (haspdus)
{
if (last_sequence==-1)
{
col_add_fstr(pinfo->cinfo, COL_INFO, "PDUS=%d, Seq=0x%04x",
pdu,first_sequence);
}else{
col_add_fstr(pinfo->cinfo, COL_INFO, "PDUS=%d, Seq=0x%04x-0x%04x",
pdu,first_sequence,last_sequence);
}
}else{
col_set_str(pinfo->cinfo, COL_INFO, "Initialization");
}
return tvb_captured_length(tvb);
} /* dissect_ipsictl */
void proto_register_ipsictl(void)
{
static hf_register_info hf[] = {
{ &hf_ipsictl_pdu,
{ "PDU", "ipsictl.pdu",
FT_UINT16, BASE_DEC, NULL, 0x0,
"IPSICTL PDU", HFILL }},
{ &hf_ipsictl_magic,
{ "Magic", "ipsictl.magic",
FT_UINT16, BASE_HEX, NULL, 0x0,
"IPSICTL Magic", HFILL }},
{ &hf_ipsictl_length,
{ "Length", "ipsictl.length",
FT_UINT16, BASE_HEX, NULL, 0x0,
"IPSICTL Length", HFILL }},
{ &hf_ipsictl_type,
{ "Type", "ipsictl.type",
FT_UINT16, BASE_HEX, NULL, 0x0,
"IPSICTL Type", HFILL }},
{ &hf_ipsictl_sequence,
{ "Sequence", "ipsictl.sequence",
FT_UINT16, BASE_HEX, NULL, 0x0,
"IPSICTL Sequence", HFILL }},
{ &hf_ipsictl_field1,
{ "Field1", "ipsictl.field1",
FT_UINT16, BASE_HEX, NULL, 0x0,
"IPSICTL Field1", HFILL }},
{ &hf_ipsictl_data,
{ "Data", "ipsictl.data",
FT_BYTES, BASE_NONE, NULL, 0x0,
"IPSICTL data", HFILL }},
};
static gint *ett[] = {
&ett_ipsictl,
&ett_ipsictl_pdu
};
proto_ipsictl = proto_register_protocol("IPSICTL", "IPSICTL", "ipsictl");
proto_register_field_array(proto_ipsictl, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
ipsictl_handle = register_dissector("ipsictl", dissect_ipsictl, proto_ipsictl);
}
void proto_reg_handoff_ipsictl(void)
{
dissector_add_uint_with_preference("tcp.port", IPSICTL_PORT, ipsictl_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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