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/* packet-ulp.c
* Routines for OMA UserPlane Location Protocol packet dissection
* Copyright 2006, Anders Broman <anders.broman@ericsson.com>
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* ref OMA-TS-ULP-V2_0_2-20140708-A
* http://www.openmobilealliance.org
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/asn1.h>
#include "packet-per.h"
#include "packet-tcp.h"
#include "packet-gsm_map.h"
#define PNAME "OMA UserPlane Location Protocol"
#define PSNAME "ULP"
#define PFNAME "ulp"
void proto_register_ulp(void);
static dissector_handle_t rrlp_handle;
static dissector_handle_t lpp_handle;
/* IANA Registered Ports
* oma-ulp 7275/tcp OMA UserPlane Location
* oma-ulp 7275/udp OMA UserPlane Location
*/
static guint gbl_ulp_tcp_port = 7275;
static guint gbl_ulp_udp_port = 7275;
/* Initialize the protocol and registered fields */
static int proto_ulp = -1;
#define ULP_HEADER_SIZE 2
static gboolean ulp_desegment = TRUE;
#include "packet-ulp-hf.c"
/* Initialize the subtree pointers */
static gint ett_ulp = -1;
#include "packet-ulp-ett.c"
/* Include constants */
#include "packet-ulp-val.h"
#include "packet-ulp-fn.c"
static guint
get_ulp_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset)
{
/* PDU length = Message length */
return tvb_get_ntohs(tvb,offset);
}
static int
dissect_ulp_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
{
tcp_dissect_pdus(tvb, pinfo, tree, ulp_desegment, ULP_HEADER_SIZE,
get_ulp_pdu_len, dissect_ULP_PDU_PDU, data);
return tvb_captured_length(tvb);
}
void proto_reg_handoff_ulp(void);
/*--- proto_register_ulp -------------------------------------------*/
void proto_register_ulp(void) {
/* List of fields */
static hf_register_info hf[] = {
#include "packet-ulp-hfarr.c"
};
/* List of subtrees */
static gint *ett[] = {
&ett_ulp,
#include "packet-ulp-ettarr.c"
};
module_t *ulp_module;
/* Register protocol */
proto_ulp = proto_register_protocol(PNAME, PSNAME, PFNAME);
new_register_dissector("ulp", dissect_ulp_tcp, proto_ulp);
/* Register fields and subtrees */
proto_register_field_array(proto_ulp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
ulp_module = prefs_register_protocol(proto_ulp,proto_reg_handoff_ulp);
prefs_register_bool_preference(ulp_module, "desegment_ulp_messages",
"Reassemble ULP messages spanning multiple TCP segments",
"Whether the ULP dissector should reassemble messages spanning multiple TCP segments."
" To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
&ulp_desegment);
/* Register a configuration option for port */
prefs_register_uint_preference(ulp_module, "tcp.port",
"ULP TCP Port",
"Set the TCP port for ULP messages (IANA registered port is 7275)",
10,
&gbl_ulp_tcp_port);
prefs_register_uint_preference(ulp_module, "udp.port",
"ULP UDP Port",
"Set the UDP port for ULP messages (IANA registered port is 7275)",
10,
&gbl_ulp_udp_port);
}
/*--- proto_reg_handoff_ulp ---------------------------------------*/
void
proto_reg_handoff_ulp(void)
{
static gboolean initialized = FALSE;
static dissector_handle_t ulp_tcp_handle, ulp_udp_handle;
static guint local_ulp_tcp_port, local_ulp_udp_port;
if (!initialized) {
ulp_tcp_handle = find_dissector("ulp");
dissector_add_string("media_type","application/oma-supl-ulp", ulp_tcp_handle);
ulp_udp_handle = new_create_dissector_handle(dissect_ULP_PDU_PDU, proto_ulp);
rrlp_handle = find_dissector("rrlp");
lpp_handle = find_dissector("lpp");
initialized = TRUE;
} else {
dissector_delete_uint("tcp.port", local_ulp_tcp_port, ulp_tcp_handle);
dissector_delete_uint("udp.port", local_ulp_udp_port, ulp_udp_handle);
}
local_ulp_tcp_port = gbl_ulp_tcp_port;
dissector_add_uint("tcp.port", gbl_ulp_tcp_port, ulp_tcp_handle);
local_ulp_udp_port = gbl_ulp_udp_port;
dissector_add_uint("udp.port", gbl_ulp_udp_port, ulp_udp_handle);
}
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