2 * Routines for UTRAN Iu-BC Interface: Service Area Broadcast Protocol (SBAP) packet dissection
3 * Copyright 2007, Tomas Kukosa <tomas.kukosa@siemens.com>
7 * Wireshark - Network traffic analyzer
8 * By Gerald Combs <gerald@wireshark.org>
9 * Copyright 1998 Gerald Combs
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 * Ref: 3GPP TS 25.419 version V9.0.0 (2009-12)
33 #include <epan/packet.h>
35 #include <epan/asn1.h>
37 #include "packet-tcp.h"
38 #include "packet-per.h"
39 #include "packet-e212.h"
40 #include "packet-gsm_map.h"
41 #include "packet-gsm_sms.h"
42 #include <epan/sctpppids.h>
44 #define PNAME "UTRAN IuBC interface SABP signaling"
48 #include "packet-sabp-val.h"
50 /* Initialize the protocol and registered fields */
51 static int proto_sabp = -1;
53 static int hf_sabp_no_of_pages = -1;
54 #include "packet-sabp-hf.c"
56 /* Initialize the subtree pointers */
57 static int ett_sabp = -1;
58 static int ett_sabp_e212 = -1;
59 static int ett_sabp_cbs_data_coding = -1;
60 static int ett_sabp_bcast_msg = -1;
62 #include "packet-sabp-ett.c"
64 /* Global variables */
65 static guint32 ProcedureCode;
66 static guint32 ProtocolIE_ID;
67 static guint32 ProtocolExtensionID;
68 static guint8 sms_encoding;
70 /* desegmentation of sabp over TCP */
71 static gboolean gbl_sabp_desegment = TRUE;
73 /* Dissector tables */
74 static dissector_table_t sabp_ies_dissector_table;
75 static dissector_table_t sabp_extension_dissector_table;
76 static dissector_table_t sabp_proc_imsg_dissector_table;
77 static dissector_table_t sabp_proc_sout_dissector_table;
78 static dissector_table_t sabp_proc_uout_dissector_table;
80 static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
81 static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
82 static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
83 static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
84 static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
86 #include "packet-sabp-fn.c"
88 static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
90 return (dissector_try_port(sabp_ies_dissector_table, ProtocolIE_ID, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
93 static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
95 return (dissector_try_port(sabp_extension_dissector_table, ProtocolExtensionID, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
98 static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
100 return (dissector_try_port(sabp_proc_imsg_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
103 static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
105 return (dissector_try_port(sabp_proc_sout_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
108 static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
110 return (dissector_try_port(sabp_proc_uout_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
114 get_sabp_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset)
119 asn1_ctx_init(&asn1_ctx, ASN1_ENC_PER, TRUE, pinfo);
121 /* Length should be in the 3:d octet */
124 bit_offset = offset<<3;
125 /* Get the length of the sabp packet. offset in bits */
126 offset = dissect_per_length_determinant(tvb, bit_offset, &asn1_ctx, NULL, -1, &type_length);
129 * Return the length of the PDU
130 * which is 3 + the length of the length, we only care about lenght up to 16K
131 * ("n" less than 128) a single octet containing "n" with bit 8 set to zero;
132 * ("n" less than 16K) two octets containing "n" with bit 8 of the first octet set to 1 and bit 7 set to zero;
134 if (type_length < 128)
135 return type_length+4;
137 return type_length+5;
142 dissect_sabp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
144 proto_item *sabp_item = NULL;
145 proto_tree *sabp_tree = NULL;
147 /* make entry in the Protocol column on summary display */
148 col_set_str(pinfo->cinfo, COL_PROTOCOL, PSNAME);
150 /* create the sbap protocol tree */
151 sabp_item = proto_tree_add_item(tree, proto_sabp, tvb, 0, -1, FALSE);
152 sabp_tree = proto_item_add_subtree(sabp_item, ett_sabp);
154 dissect_SABP_PDU_PDU(tvb, pinfo, sabp_tree);
157 /* Note a little bit of a hack assumes length max takes two bytes and that the length starts at byte 4 */
159 dissect_sabp_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
161 tcp_dissect_pdus(tvb, pinfo, tree, gbl_sabp_desegment, 5,
162 get_sabp_pdu_len, dissect_sabp);
165 /*--- proto_register_sbap -------------------------------------------*/
166 void proto_register_sabp(void) {
170 static hf_register_info hf[] = {
171 { &hf_sabp_no_of_pages,
172 { "Number-of-Pages", "sabp.no_of_pages",
173 FT_UINT8, BASE_DEC, NULL, 0,
176 #include "packet-sabp-hfarr.c"
179 /* List of subtrees */
180 static gint *ett[] = {
183 &ett_sabp_cbs_data_coding,
185 #include "packet-sabp-ettarr.c"
189 /* Register protocol */
190 proto_sabp = proto_register_protocol(PNAME, PSNAME, PFNAME);
191 /* Register fields and subtrees */
192 proto_register_field_array(proto_sabp, hf, array_length(hf));
193 proto_register_subtree_array(ett, array_length(ett));
195 /* Register dissector */
196 register_dissector("sabp", dissect_sabp, proto_sabp);
197 register_dissector("sabp.tcp", dissect_sabp_tcp, proto_sabp);
199 /* Register dissector tables */
200 sabp_ies_dissector_table = register_dissector_table("sabp.ies", "SABP-PROTOCOL-IES", FT_UINT32, BASE_DEC);
201 sabp_extension_dissector_table = register_dissector_table("sabp.extension", "SABP-PROTOCOL-EXTENSION", FT_UINT32, BASE_DEC);
202 sabp_proc_imsg_dissector_table = register_dissector_table("sabp.proc.imsg", "SABP-ELEMENTARY-PROCEDURE InitiatingMessage", FT_UINT32, BASE_DEC);
203 sabp_proc_sout_dissector_table = register_dissector_table("sabp.proc.sout", "SABP-ELEMENTARY-PROCEDURE SuccessfulOutcome", FT_UINT32, BASE_DEC);
204 sabp_proc_uout_dissector_table = register_dissector_table("sabp.proc.uout", "SABP-ELEMENTARY-PROCEDURE UnsuccessfulOutcome", FT_UINT32, BASE_DEC);
209 /*--- proto_reg_handoff_sbap ---------------------------------------*/
211 proto_reg_handoff_sabp(void)
213 dissector_handle_t sabp_handle;
214 dissector_handle_t sabp_tcp_handle;
216 sabp_handle = find_dissector("sabp");
217 sabp_tcp_handle = find_dissector("sabp.tcp");
218 dissector_add("udp.port", 3452, sabp_handle);
219 dissector_add("tcp.port", 3452, sabp_tcp_handle);
220 dissector_add("sctp.ppi", SABP_PAYLOAD_PROTOCOL_ID, sabp_handle);
222 #include "packet-sabp-dis-tab.c"