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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
25 * Ref: 3GPP TS 25.419 version V9.0.0 (2009-12)
31 #include <epan/packet.h>
33 #include <epan/asn1.h>
35 #include "packet-tcp.h"
36 #include "packet-per.h"
37 #include "packet-e212.h"
38 #include "packet-gsm_map.h"
39 #include "packet-gsm_sms.h"
40 #include <epan/sctpppids.h>
41 #include "packet-cell_broadcast.h"
43 #define PNAME "UTRAN IuBC interface SABP signaling"
47 #include "packet-sabp-val.h"
49 void proto_register_sabp(void);
50 void proto_reg_handoff_sabp(void);
52 /* Initialize the protocol and registered fields */
53 static int proto_sabp = -1;
55 static int hf_sabp_no_of_pages = -1;
56 static int hf_sabp_cb_inf_len = -1;
57 static int hf_sabp_cb_msg_inf_page = -1;
58 static int hf_sabp_cbs_page_content = -1;
59 #include "packet-sabp-hf.c"
61 /* Initialize the subtree pointers */
62 static int ett_sabp = -1;
63 static int ett_sabp_e212 = -1;
64 static int ett_sabp_cbs_data_coding = -1;
65 static int ett_sabp_bcast_msg = -1;
66 static int ett_sabp_cbs_serial_number = -1;
67 static int ett_sabp_cbs_new_serial_number = -1;
68 static int ett_sabp_cbs_page = -1;
69 static int ett_sabp_cbs_page_content = -1;
71 #include "packet-sabp-ett.c"
73 /* Global variables */
74 static guint32 ProcedureCode;
75 static guint32 ProtocolIE_ID;
76 static guint32 ProtocolExtensionID;
77 static guint8 sms_encoding;
79 /* desegmentation of sabp over TCP */
80 static gboolean gbl_sabp_desegment = TRUE;
82 /* Dissector tables */
83 static dissector_table_t sabp_ies_dissector_table;
84 static dissector_table_t sabp_extension_dissector_table;
85 static dissector_table_t sabp_proc_imsg_dissector_table;
86 static dissector_table_t sabp_proc_sout_dissector_table;
87 static dissector_table_t sabp_proc_uout_dissector_table;
89 static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
90 static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
91 static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
92 static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
93 static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
94 static void dissect_sabp_cb_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
96 #include "packet-sabp-fn.c"
98 static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
100 return (dissector_try_uint(sabp_ies_dissector_table, ProtocolIE_ID, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
103 static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
105 return (dissector_try_uint(sabp_extension_dissector_table, ProtocolExtensionID, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
108 static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
110 return (dissector_try_uint(sabp_proc_imsg_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
113 static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
115 return (dissector_try_uint(sabp_proc_sout_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
118 static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
120 return (dissector_try_uint(sabp_proc_uout_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
124 /* 3GPP TS 23.041 version 11.4.0
128 dissect_sabp_cb_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
130 proto_item *item, *cbs_page_item;
132 tvbuff_t *page_tvb, *unpacked_tvb;
135 guint8 nr_pages, len, cb_inf_msg_len;
138 /* Octet 1 Number-of-Pages */
139 nr_pages = tvb_get_guint8(tvb, offset);
140 proto_tree_add_item(tree, hf_sabp_no_of_pages, tvb, offset, 1, ENC_BIG_ENDIAN);
143 * NOTE: n equal to or less than 15
149 for (n = 0; n < nr_pages; n++) {
150 item = proto_tree_add_text(tree, tvb, offset, 83, "CB page %u data", n+1);
151 subtree = proto_item_add_subtree(item, ett_sabp_cbs_page);
152 /* octet 2 - 83 CBS-Message-Information-Page 1 */
153 cbs_page_item = proto_tree_add_item(subtree, hf_sabp_cb_msg_inf_page, tvb, offset, 82, ENC_BIG_ENDIAN);
154 cb_inf_msg_len = tvb_get_guint8(tvb,offset+82);
155 page_tvb = tvb_new_subset(tvb, offset, cb_inf_msg_len, cb_inf_msg_len);
156 unpacked_tvb = dissect_cbs_data(sms_encoding, page_tvb, subtree, pinfo, 0);
157 len = tvb_length(unpacked_tvb);
158 if (unpacked_tvb != NULL){
160 proto_tree *cbs_page_subtree = proto_item_add_subtree(cbs_page_item, ett_sabp_cbs_page_content);
161 proto_tree_add_string(cbs_page_subtree, hf_sabp_cbs_page_content, unpacked_tvb, 0, len, tvb_get_ephemeral_string(unpacked_tvb, 0, len));
166 /* 84 CBS-Message-Information-Length 1 */
167 proto_tree_add_item(subtree, hf_sabp_cb_inf_len, tvb, offset, 1, ENC_BIG_ENDIAN);
175 get_sabp_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset)
180 asn1_ctx_init(&asn1_ctx, ASN1_ENC_PER, TRUE, pinfo);
182 /* Length should be in the 3:d octet */
185 bit_offset = offset<<3;
186 /* Get the length of the sabp packet. offset in bits */
187 dissect_per_length_determinant(tvb, bit_offset, &asn1_ctx, NULL, -1, &type_length);
190 * Return the length of the PDU
191 * which is 3 + the length of the length, we only care about length up to 16K
192 * ("n" less than 128) a single octet containing "n" with bit 8 set to zero;
193 * ("n" less than 16K) two octets containing "n" with bit 8 of the first octet set to 1 and bit 7 set to zero;
195 if (type_length < 128)
196 return type_length+4;
198 return type_length+5;
203 dissect_sabp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
205 proto_item *sabp_item = NULL;
206 proto_tree *sabp_tree = NULL;
208 /* make entry in the Protocol column on summary display */
209 col_set_str(pinfo->cinfo, COL_PROTOCOL, PSNAME);
211 /* create the sbap protocol tree */
212 sabp_item = proto_tree_add_item(tree, proto_sabp, tvb, 0, -1, ENC_NA);
213 sabp_tree = proto_item_add_subtree(sabp_item, ett_sabp);
215 dissect_SABP_PDU_PDU(tvb, pinfo, sabp_tree, NULL);
218 /* Note a little bit of a hack assumes length max takes two bytes and that the length starts at byte 4 */
220 dissect_sabp_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
222 tcp_dissect_pdus(tvb, pinfo, tree, gbl_sabp_desegment, 5,
223 get_sabp_pdu_len, dissect_sabp);
226 /*--- proto_register_sbap -------------------------------------------*/
227 void proto_register_sabp(void) {
231 static hf_register_info hf[] = {
232 { &hf_sabp_no_of_pages,
233 { "Number-of-Pages", "sabp.no_of_pages",
234 FT_UINT8, BASE_DEC, NULL, 0,
236 { &hf_sabp_cb_msg_inf_page,
237 { "CBS-Message-Information-Page", "sabp.cb_msg_inf_page",
238 FT_BYTES, BASE_NONE, NULL, 0,
240 { &hf_sabp_cbs_page_content,
241 { "CBS Page Content", "sabp.cb_page_content",
242 FT_STRING, BASE_NONE, NULL, 0,
244 { &hf_sabp_cb_inf_len,
245 { "CBS-Message-Information-Length", "sabp.cb_inf_len",
246 FT_UINT8, BASE_DEC, NULL, 0,
249 #include "packet-sabp-hfarr.c"
252 /* List of subtrees */
253 static gint *ett[] = {
256 &ett_sabp_cbs_data_coding,
258 &ett_sabp_cbs_serial_number,
259 &ett_sabp_cbs_new_serial_number,
261 &ett_sabp_cbs_page_content,
262 #include "packet-sabp-ettarr.c"
266 /* Register protocol */
267 proto_sabp = proto_register_protocol(PNAME, PSNAME, PFNAME);
268 /* Register fields and subtrees */
269 proto_register_field_array(proto_sabp, hf, array_length(hf));
270 proto_register_subtree_array(ett, array_length(ett));
272 /* Register dissector */
273 register_dissector("sabp", dissect_sabp, proto_sabp);
274 register_dissector("sabp.tcp", dissect_sabp_tcp, proto_sabp);
276 /* Register dissector tables */
277 sabp_ies_dissector_table = register_dissector_table("sabp.ies", "SABP-PROTOCOL-IES", FT_UINT32, BASE_DEC);
278 sabp_extension_dissector_table = register_dissector_table("sabp.extension", "SABP-PROTOCOL-EXTENSION", FT_UINT32, BASE_DEC);
279 sabp_proc_imsg_dissector_table = register_dissector_table("sabp.proc.imsg", "SABP-ELEMENTARY-PROCEDURE InitiatingMessage", FT_UINT32, BASE_DEC);
280 sabp_proc_sout_dissector_table = register_dissector_table("sabp.proc.sout", "SABP-ELEMENTARY-PROCEDURE SuccessfulOutcome", FT_UINT32, BASE_DEC);
281 sabp_proc_uout_dissector_table = register_dissector_table("sabp.proc.uout", "SABP-ELEMENTARY-PROCEDURE UnsuccessfulOutcome", FT_UINT32, BASE_DEC);
286 /*--- proto_reg_handoff_sbap ---------------------------------------*/
288 proto_reg_handoff_sabp(void)
290 dissector_handle_t sabp_handle;
291 dissector_handle_t sabp_tcp_handle;
293 sabp_handle = find_dissector("sabp");
294 sabp_tcp_handle = find_dissector("sabp.tcp");
295 dissector_add_uint("udp.port", 3452, sabp_handle);
296 dissector_add_uint("tcp.port", 3452, sabp_tcp_handle);
297 dissector_add_uint("sctp.ppi", SABP_PAYLOAD_PROTOCOL_ID, sabp_handle);
299 #include "packet-sabp-dis-tab.c"