![Gilbert Ramirez](/assets/img/avatar_default.png)
Also move ncp222.py, x11-fields, process-x11-fields.pl, make-reg-dotc, and make-reg-dotc.py. Adjust #include lines in files that include packet-*.h files. svn path=/trunk/; revision=11410
367 lines
9.4 KiB
C
367 lines
9.4 KiB
C
/* packet-gprs-ns.c
|
|
* Routines for GPRS Network Service (ETSI GSM 08.16 version 6.3.0)
|
|
* dissection
|
|
* Copyright 2003, Josef Korelus <jkor@quick.cz>
|
|
*
|
|
* $Id$
|
|
*
|
|
* 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 <glib.h>
|
|
#include <epan/packet.h>
|
|
|
|
/*ETSI GSM08.16 Network Service */
|
|
#define NS_UNITDATA 0x00
|
|
#define NS_RESET 0x02
|
|
#define NS_RESET_ACK 0x03
|
|
#define NS_BLOCK 0x04
|
|
#define NS_BLOCK_ACK 0x05
|
|
#define NS_UNBLOCK 0x06
|
|
#define NS_UNBLOCK_ACK 0x07
|
|
#define NS_STATUS 0x08
|
|
#define NS_ALIVE 0x0a
|
|
#define NS_ALIVE_ACK 0x0b
|
|
|
|
/*ETSI GSM 08.16 IEI coding */
|
|
#define Cause 0x00
|
|
#define NS_VCI 0x01
|
|
#define NS_PDU 0x02
|
|
#define BVCI 0x03
|
|
#define NSEI 0x04
|
|
|
|
static int proto_gprs_ns = -1;
|
|
static gint ett_gprs_ns = -1;
|
|
static int hf_gprs_ns_pdutype = -1;
|
|
static int hf_gprs_ns_ie_type = -1;
|
|
static int hf_gprs_ns_ie_length = -1;
|
|
static int hf_gprs_ns_cause = -1;
|
|
static int hf_gprs_ns_vci = -1;
|
|
static int hf_gprs_ns_nsei = -1;
|
|
static int hf_gprs_ns_bvci = -1;
|
|
static int hf_gprs_ns_spare = -1;
|
|
|
|
static const value_string ns_pdu_type[]= {
|
|
{ NS_UNITDATA, "NS-UNITDATA" },
|
|
{ NS_RESET, "NS-RESET" },
|
|
{ NS_RESET_ACK, "NS-RESET-ACK" },
|
|
{ NS_BLOCK, "NS-BLOCK" },
|
|
{ NS_BLOCK_ACK, "NS-BLOCK-ACK" },
|
|
{ NS_UNBLOCK, "NS-UNBLOCK" },
|
|
{ NS_UNBLOCK_ACK, "NS-UNBLOCK-ACK" },
|
|
{ NS_STATUS, "NS-STATUS" },
|
|
{ NS_ALIVE, "NS-ALIVE" },
|
|
{ NS_ALIVE_ACK, "NS-ALIVE-ACK" },
|
|
{ 0, NULL },
|
|
};
|
|
|
|
static const value_string ns_ie_type[]= {
|
|
{ Cause, "Cause" },
|
|
{ NS_VCI, "NS-VCI"},
|
|
{ NS_PDU, "NS PDU"},
|
|
{ BVCI, "BVCI"},
|
|
{ NSEI, "NSEI"},
|
|
{ 0, NULL },
|
|
};
|
|
|
|
static const value_string cause_val[]= {
|
|
{ 0x0, "Transit network failure" },
|
|
{ 0x1, "O&M intervention" },
|
|
{ 0x2, "Equipment failure" },
|
|
{ 0x3, "NS-VC blocked " },
|
|
{ 0x4, "NS-VC unknown" },
|
|
{ 0x5, "NS-VC unknown on that NSE" },
|
|
{ 0x8, "Semantically incorrect PDU" },
|
|
{ 0xa, "PDU not compatible with protocol state" },
|
|
{ 0xb, "Protocol error - unspecified" },
|
|
{ 0xc, "Invalid essential IE" },
|
|
{ 0xd, "Missing essential IE" },
|
|
{ 0, NULL },
|
|
};
|
|
|
|
static dissector_handle_t bssgp_handle;
|
|
|
|
static void
|
|
process_tlvs(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
guint8 type;
|
|
int length_len;
|
|
guint16 length;
|
|
guint8 cause;
|
|
guint16 nsvc, bvc, nsei;
|
|
|
|
while (tvb_reported_length_remaining(tvb, offset) > 0) {
|
|
type = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_uint(tree, hf_gprs_ns_ie_type,
|
|
tvb, offset, 1, type);
|
|
offset++;
|
|
|
|
length_len = 1;
|
|
length = tvb_get_guint8(tvb, offset);
|
|
if (length & 0x80) {
|
|
/*
|
|
* This is the final octet of the length.
|
|
*/
|
|
length &= 0x7F;
|
|
} else {
|
|
/*
|
|
* One more octet.
|
|
*/
|
|
length_len++;
|
|
length = (length << 8) | tvb_get_guint8(tvb, offset);
|
|
}
|
|
proto_tree_add_uint(tree, hf_gprs_ns_ie_length,
|
|
tvb, offset, length_len, length);
|
|
offset += length_len;
|
|
|
|
switch (type) {
|
|
|
|
case Cause:
|
|
if (length == 1) {
|
|
cause = tvb_get_guint8(tvb, offset);
|
|
if (tree) {
|
|
proto_tree_add_uint(tree,
|
|
hf_gprs_ns_cause, tvb, offset, 1,
|
|
cause);
|
|
}
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
" Cause: %s",
|
|
val_to_str(cause, cause_val, "Unknown (0x%02x)"));
|
|
}
|
|
} else {
|
|
if (tree) {
|
|
proto_tree_add_text(tree,
|
|
tvb, offset, length,
|
|
"Bad cause length %u, should be 1",
|
|
length);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case NS_VCI:
|
|
if (length == 2) {
|
|
nsvc = tvb_get_ntohs(tvb, offset);
|
|
if (tree) {
|
|
proto_tree_add_uint(tree,
|
|
hf_gprs_ns_vci, tvb, offset, 2,
|
|
nsvc);
|
|
}
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
" NSVCI: %u", nsvc);
|
|
}
|
|
} else {
|
|
if (tree) {
|
|
proto_tree_add_text(tree,
|
|
tvb, offset, length,
|
|
"Bad NS-VCI length %u, should be 2",
|
|
length);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case NS_PDU:
|
|
/*
|
|
* XXX - dissect as a GPRS NS PDU.
|
|
* Do the usual "error packet" stuff.
|
|
*/
|
|
if (tree) {
|
|
proto_tree_add_text(tree,
|
|
tvb, offset, length,
|
|
"Error PDU");
|
|
}
|
|
break;
|
|
|
|
case BVCI:
|
|
if (length == 2) {
|
|
bvc = tvb_get_ntohs(tvb, offset);
|
|
if (tree) {
|
|
proto_tree_add_uint(tree,
|
|
hf_gprs_ns_bvci, tvb, offset, 2,
|
|
bvc);
|
|
}
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
" BVCI: %u", bvc);
|
|
}
|
|
} else {
|
|
if (tree) {
|
|
proto_tree_add_text(tree,
|
|
tvb, offset, length,
|
|
"Bad BVCI length %u, should be 2",
|
|
length);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case NSEI:
|
|
if (length == 2) {
|
|
nsei = tvb_get_ntohs(tvb, offset);
|
|
if (tree) {
|
|
proto_tree_add_uint(tree,
|
|
hf_gprs_ns_nsei, tvb, offset, 2,
|
|
nsei);
|
|
}
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
" NSEI: %u", nsei);
|
|
}
|
|
} else {
|
|
if (tree) {
|
|
proto_tree_add_text(tree,
|
|
tvb, offset, length,
|
|
"Bad NSEI length %u, should be 2",
|
|
length);
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (tree) {
|
|
proto_tree_add_text(tree,
|
|
tvb, offset, length,
|
|
"Unknown IE contents");
|
|
}
|
|
break;
|
|
}
|
|
offset += length;
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_gprs_ns(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
int offset = 0;
|
|
proto_item *ti = NULL;
|
|
proto_tree *gprs_ns_tree = NULL;
|
|
guint8 nspdu;
|
|
guint16 bvc;
|
|
tvbuff_t *next_tvb;
|
|
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "GPRS NS");
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
nspdu = tvb_get_guint8(tvb,offset);
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_add_str(pinfo->cinfo, COL_INFO,
|
|
val_to_str(nspdu, ns_pdu_type, "Unknown PDU type (0x%02x)"));
|
|
}
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_gprs_ns, tvb, 0, -1, FALSE);
|
|
gprs_ns_tree = proto_item_add_subtree(ti, ett_gprs_ns);
|
|
proto_tree_add_uint(gprs_ns_tree, hf_gprs_ns_pdutype, tvb, 0, 1, nspdu);
|
|
}
|
|
offset++;
|
|
|
|
switch (nspdu) {
|
|
|
|
case NS_ALIVE:
|
|
case NS_ALIVE_ACK:
|
|
case NS_UNBLOCK:
|
|
case NS_UNBLOCK_ACK:
|
|
break;
|
|
|
|
case NS_BLOCK:
|
|
case NS_BLOCK_ACK:
|
|
case NS_RESET:
|
|
case NS_RESET_ACK:
|
|
case NS_STATUS:
|
|
/*
|
|
* Process TLVs.
|
|
*/
|
|
process_tlvs(tvb, offset, pinfo, gprs_ns_tree);
|
|
break;
|
|
|
|
case NS_UNITDATA:
|
|
if (tree)
|
|
proto_tree_add_item(gprs_ns_tree, hf_gprs_ns_spare, tvb, offset, 1, FALSE);
|
|
offset++;
|
|
bvc = tvb_get_ntohs(tvb,offset);
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " BVCI: %u", bvc);
|
|
if (tree)
|
|
proto_tree_add_uint(gprs_ns_tree, hf_gprs_ns_bvci, tvb, offset, 2, bvc);
|
|
offset=offset+2;
|
|
next_tvb = tvb_new_subset(tvb, offset, -1, -1);
|
|
call_dissector(bssgp_handle, next_tvb, pinfo, tree);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Register the protocol with Ethereal */
|
|
void
|
|
proto_register_gprs_ns(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_gprs_ns_pdutype, {
|
|
"PDU Type", "gprs_ns.pdutype", FT_UINT8, BASE_HEX,
|
|
VALS(ns_pdu_type), 0x0, "NS Command", HFILL}},
|
|
{ &hf_gprs_ns_ie_type, {
|
|
"IE Type", "gprs_ns.ietype", FT_UINT8, BASE_HEX,
|
|
VALS(ns_ie_type), 0x0, "IE Type", HFILL}},
|
|
{ &hf_gprs_ns_ie_length, {
|
|
"IE Length", "gprs_ns.ielength", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "IE Length", HFILL}},
|
|
{ &hf_gprs_ns_cause, {
|
|
"Cause", "gprs_ns.cause", FT_UINT8, BASE_HEX,
|
|
VALS(cause_val), 0x0, "Cause", HFILL}},
|
|
{ &hf_gprs_ns_vci, {
|
|
"NSVCI", "gprs_ns.nsvci", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "Network Service Virtual Connection id", HFILL}},
|
|
{ &hf_gprs_ns_nsei, {
|
|
"NSEI", "gprs_ns.nsei", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "Network Service Entity Id", HFILL}},
|
|
{ &hf_gprs_ns_bvci, {
|
|
"BVCI", "gprs_ns.bvci", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "Cell ID", HFILL}},
|
|
{ &hf_gprs_ns_spare, {
|
|
"Spare octet", "gprs_ns.spare", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, "", HFILL}},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_gprs_ns,
|
|
};
|
|
|
|
proto_gprs_ns = proto_register_protocol("GPRS Network service",
|
|
"GPRS NS","gprs_ns");
|
|
proto_register_field_array(proto_gprs_ns, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
register_dissector("gprs_ns", dissect_gprs_ns, proto_gprs_ns);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_gprs_ns(void)
|
|
{
|
|
bssgp_handle = find_dissector("bssgp");
|
|
}
|