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1 office 1 /* Copyright (c) 2013, The TCPDUMP project
2 * All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * 1. Redistributions of source code must retain the above copyright notice, this
8 * list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright notice,
10 * this list of conditions and the following disclaimer in the documentation
11 * and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
17 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
20 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24  
25 #define NETDISSECT_REWORKED
26 #ifdef HAVE_CONFIG_H
27 #include "config.h"
28 #endif
29  
30 #include <tcpdump-stdinc.h>
31  
32 #include "interface.h"
33 #include "extract.h"
34  
35 static const char tstr[] = " [|m3ua]";
36 static const char cstr[] = " (corrupt)";
37  
38 /* RFC 4666 */
39  
40 #define M3UA_REL_1_0 1
41  
42 struct m3ua_common_header {
43 uint8_t v;
44 uint8_t reserved;
45 uint8_t msg_class;
46 uint8_t msg_type;
47 uint32_t len;
48 };
49  
50 struct m3ua_param_header {
51 uint16_t tag;
52 uint16_t len;
53 };
54  
55 /* message classes */
56 #define M3UA_MSGC_MGMT 0
57 #define M3UA_MSGC_TRANSFER 1
58 #define M3UA_MSGC_SSNM 2
59 #define M3UA_MSGC_ASPSM 3
60 #define M3UA_MSGC_ASPTM 4
61 /* reserved values */
62 #define M3UA_MSGC_RKM 9
63  
64 static const struct tok MessageClasses[] = {
65 { M3UA_MSGC_MGMT, "Management" },
66 { M3UA_MSGC_TRANSFER, "Transfer" },
67 { M3UA_MSGC_SSNM, "SS7" },
68 { M3UA_MSGC_ASPSM, "ASP" },
69 { M3UA_MSGC_ASPTM, "ASP" },
70 { M3UA_MSGC_RKM, "Routing Key Managment" },
71 { 0, NULL }
72 };
73  
74 /* management messages */
75 #define M3UA_MGMT_ERROR 0
76 #define M3UA_MGMT_NOTIFY 1
77  
78 static const struct tok MgmtMessages[] = {
79 { M3UA_MGMT_ERROR, "Error" },
80 { M3UA_MGMT_NOTIFY, "Notify" },
81 { 0, NULL }
82 };
83  
84 /* transfer messages */
85 #define M3UA_TRANSFER_DATA 1
86  
87 static const struct tok TransferMessages[] = {
88 { M3UA_TRANSFER_DATA, "Data" },
89 { 0, NULL }
90 };
91  
92 /* SS7 Signaling Network Management messages */
93 #define M3UA_SSNM_DUNA 1
94 #define M3UA_SSNM_DAVA 2
95 #define M3UA_SSNM_DAUD 3
96 #define M3UA_SSNM_SCON 4
97 #define M3UA_SSNM_DUPU 5
98 #define M3UA_SSNM_DRST 6
99  
100 static const struct tok SS7Messages[] = {
101 { M3UA_SSNM_DUNA, "Destination Unavailable" },
102 { M3UA_SSNM_DAVA, "Destination Available" },
103 { M3UA_SSNM_DAUD, "Destination State Audit" },
104 { M3UA_SSNM_SCON, "Signalling Congestion" },
105 { M3UA_SSNM_DUPU, "Destination User Part Unavailable" },
106 { M3UA_SSNM_DRST, "Destination Restricted" },
107 { 0, NULL }
108 };
109  
110 /* ASP State Maintenance messages */
111 #define M3UA_ASP_UP 1
112 #define M3UA_ASP_DN 2
113 #define M3UA_ASP_BEAT 3
114 #define M3UA_ASP_UP_ACK 4
115 #define M3UA_ASP_DN_ACK 5
116 #define M3UA_ASP_BEAT_ACK 6
117  
118 static const struct tok ASPStateMessages[] = {
119 { M3UA_ASP_UP, "Up" },
120 { M3UA_ASP_DN, "Down" },
121 { M3UA_ASP_BEAT, "Heartbeat" },
122 { M3UA_ASP_UP_ACK, "Up Acknowledgement" },
123 { M3UA_ASP_DN_ACK, "Down Acknowledgement" },
124 { M3UA_ASP_BEAT_ACK, "Heartbeat Acknowledgement" },
125 { 0, NULL }
126 };
127  
128 /* ASP Traffic Maintenance messages */
129 #define M3UA_ASP_AC 1
130 #define M3UA_ASP_IA 2
131 #define M3UA_ASP_AC_ACK 3
132 #define M3UA_ASP_IA_ACK 4
133  
134 static const struct tok ASPTrafficMessages[] = {
135 { M3UA_ASP_AC, "Active" },
136 { M3UA_ASP_IA, "Inactive" },
137 { M3UA_ASP_AC_ACK, "Active Acknowledgement" },
138 { M3UA_ASP_IA_ACK, "Inactive Acknowledgement" },
139 { 0, NULL }
140 };
141  
142 /* Routing Key Management messages */
143 #define M3UA_RKM_REQ 1
144 #define M3UA_RKM_RSP 2
145 #define M3UA_RKM_DEREQ 3
146 #define M3UA_RKM_DERSP 4
147  
148 static const struct tok RoutingKeyMgmtMessages[] = {
149 { M3UA_RKM_REQ, "Registration Request" },
150 { M3UA_RKM_RSP, "Registration Response" },
151 { M3UA_RKM_DEREQ, "Deregistration Request" },
152 { M3UA_RKM_DERSP, "Deregistration Response" },
153 { 0, NULL }
154 };
155  
156 /* M3UA Parameters */
157 #define M3UA_PARAM_INFO 0x0004
158 #define M3UA_PARAM_ROUTING_CTX 0x0006
159 #define M3UA_PARAM_DIAGNOSTIC 0x0007
160 #define M3UA_PARAM_HB_DATA 0x0009
161 #define M3UA_PARAM_TRAFFIC_MODE_TYPE 0x000b
162 #define M3UA_PARAM_ERROR_CODE 0x000c
163 #define M3UA_PARAM_STATUS 0x000d
164 #define M3UA_PARAM_ASP_ID 0x0011
165 #define M3UA_PARAM_AFFECTED_POINT_CODE 0x0012
166 #define M3UA_PARAM_CORR_ID 0x0013
167  
168 #define M3UA_PARAM_NETWORK_APPEARANCE 0x0200
169 #define M3UA_PARAM_USER 0x0204
170 #define M3UA_PARAM_CONGESTION_INDICATION 0x0205
171 #define M3UA_PARAM_CONCERNED_DST 0x0206
172 #define M3UA_PARAM_ROUTING_KEY 0x0207
173 #define M3UA_PARAM_REG_RESULT 0x0208
174 #define M3UA_PARAM_DEREG_RESULT 0x0209
175 #define M3UA_PARAM_LOCAL_ROUTING_KEY_ID 0x020a
176 #define M3UA_PARAM_DST_POINT_CODE 0x020b
177 #define M3UA_PARAM_SI 0x020c
178 #define M3UA_PARAM_ORIGIN_POINT_CODE_LIST 0x020e
179 #define M3UA_PARAM_PROTO_DATA 0x0210
180 #define M3UA_PARAM_REG_STATUS 0x0212
181 #define M3UA_PARAM_DEREG_STATUS 0x0213
182  
183 static const struct tok ParamName[] = {
184 { M3UA_PARAM_INFO, "INFO String" },
185 { M3UA_PARAM_ROUTING_CTX, "Routing Context" },
186 { M3UA_PARAM_DIAGNOSTIC, "Diagnostic Info" },
187 { M3UA_PARAM_HB_DATA, "Heartbeat Data" },
188 { M3UA_PARAM_TRAFFIC_MODE_TYPE, "Traffic Mode Type" },
189 { M3UA_PARAM_ERROR_CODE, "Error Code" },
190 { M3UA_PARAM_STATUS, "Status" },
191 { M3UA_PARAM_ASP_ID, "ASP Identifier" },
192 { M3UA_PARAM_AFFECTED_POINT_CODE, "Affected Point Code" },
193 { M3UA_PARAM_CORR_ID, "Correlation ID" },
194 { M3UA_PARAM_NETWORK_APPEARANCE, "Network Appearance" },
195 { M3UA_PARAM_USER, "User/Cause" },
196 { M3UA_PARAM_CONGESTION_INDICATION, "Congestion Indications" },
197 { M3UA_PARAM_CONCERNED_DST, "Concerned Destination" },
198 { M3UA_PARAM_ROUTING_KEY, "Routing Key" },
199 { M3UA_PARAM_REG_RESULT, "Registration Result" },
200 { M3UA_PARAM_DEREG_RESULT, "Deregistration Result" },
201 { M3UA_PARAM_LOCAL_ROUTING_KEY_ID, "Local Routing Key Identifier" },
202 { M3UA_PARAM_DST_POINT_CODE, "Destination Point Code" },
203 { M3UA_PARAM_SI, "Service Indicators" },
204 { M3UA_PARAM_ORIGIN_POINT_CODE_LIST, "Originating Point Code List" },
205 { M3UA_PARAM_PROTO_DATA, "Protocol Data" },
206 { M3UA_PARAM_REG_STATUS, "Registration Status" },
207 { M3UA_PARAM_DEREG_STATUS, "Deregistration Status" },
208 { 0, NULL }
209 };
210  
211 static void
212 tag_value_print(netdissect_options *ndo,
213 const u_char *buf, const uint16_t tag, const uint16_t size)
214 {
215 switch (tag) {
216 case M3UA_PARAM_NETWORK_APPEARANCE:
217 case M3UA_PARAM_ROUTING_CTX:
218 case M3UA_PARAM_CORR_ID:
219 /* buf and size don't include the header */
220 if (size < 4)
221 goto corrupt;
222 ND_TCHECK2(*buf, size);
223 ND_PRINT((ndo, "0x%08x", EXTRACT_32BITS(buf)));
224 break;
225 /* ... */
226 default:
227 ND_PRINT((ndo, "(length %u)", size + (u_int)sizeof(struct m3ua_param_header)));
228 ND_TCHECK2(*buf, size);
229 }
230 return;
231  
232 corrupt:
233 ND_PRINT((ndo, "%s", cstr));
234 ND_TCHECK2(*buf, size);
235 return;
236 trunc:
237 ND_PRINT((ndo, "%s", tstr));
238 }
239  
240 /*
241 * 0 1 2 3
242 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
243 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
244 * | Parameter Tag | Parameter Length |
245 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
246 * \ \
247 * / Parameter Value /
248 * \ \
249 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
250 */
251 static void
252 m3ua_tags_print(netdissect_options *ndo,
253 const u_char *buf, const u_int size)
254 {
255 const u_char *p = buf;
256 int align;
257 uint16_t hdr_tag;
258 uint16_t hdr_len;
259  
260 while (p < buf + size) {
261 if (p + sizeof(struct m3ua_param_header) > buf + size)
262 goto corrupt;
263 ND_TCHECK2(*p, sizeof(struct m3ua_param_header));
264 /* Parameter Tag */
265 hdr_tag = EXTRACT_16BITS(p);
266 ND_PRINT((ndo, "\n\t\t\t%s: ", tok2str(ParamName, "Unknown Parameter (0x%04x)", hdr_tag)));
267 /* Parameter Length */
268 hdr_len = EXTRACT_16BITS(p + 2);
269 if (hdr_len < sizeof(struct m3ua_param_header))
270 goto corrupt;
271 /* Parameter Value */
272 align = (p + hdr_len - buf) % 4;
273 align = align ? 4 - align : 0;
274 ND_TCHECK2(*p, hdr_len + align);
275 tag_value_print(ndo, p, hdr_tag, hdr_len - sizeof(struct m3ua_param_header));
276 p += hdr_len + align;
277 }
278 return;
279  
280 corrupt:
281 ND_PRINT((ndo, "%s", cstr));
282 ND_TCHECK2(*buf, size);
283 return;
284 trunc:
285 ND_PRINT((ndo, "%s", tstr));
286 }
287  
288 /*
289 * 0 1 2 3
290 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
291 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
292 * | Version | Reserved | Message Class | Message Type |
293 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
294 * | Message Length |
295 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
296 * \ \
297 * / /
298 */
299 void
300 m3ua_print(netdissect_options *ndo,
301 const u_char *buf, const u_int size)
302 {
303 const struct m3ua_common_header *hdr = (const struct m3ua_common_header *) buf;
304 const struct tok *dict;
305  
306 /* size includes the header */
307 if (size < sizeof(struct m3ua_common_header))
308 goto corrupt;
309 ND_TCHECK(*hdr);
310 if (hdr->v != M3UA_REL_1_0)
311 return;
312  
313 dict =
314 hdr->msg_class == M3UA_MSGC_MGMT ? MgmtMessages :
315 hdr->msg_class == M3UA_MSGC_TRANSFER ? TransferMessages :
316 hdr->msg_class == M3UA_MSGC_SSNM ? SS7Messages :
317 hdr->msg_class == M3UA_MSGC_ASPSM ? ASPStateMessages :
318 hdr->msg_class == M3UA_MSGC_ASPTM ? ASPTrafficMessages :
319 hdr->msg_class == M3UA_MSGC_RKM ? RoutingKeyMgmtMessages :
320 NULL;
321  
322 ND_PRINT((ndo, "\n\t\t%s", tok2str(MessageClasses, "Unknown message class %i", hdr->msg_class)));
323 if (dict != NULL)
324 ND_PRINT((ndo, " %s Message", tok2str(dict, "Unknown (0x%02x)", hdr->msg_type)));
325  
326 if (size != EXTRACT_32BITS(&hdr->len))
327 ND_PRINT((ndo, "\n\t\t\t@@@@@@ Corrupted length %u of message @@@@@@", EXTRACT_32BITS(&hdr->len)));
328 else
329 m3ua_tags_print(ndo, buf + sizeof(struct m3ua_common_header), EXTRACT_32BITS(&hdr->len) - sizeof(struct m3ua_common_header));
330 return;
331  
332 corrupt:
333 ND_PRINT((ndo, "%s", cstr));
334 ND_TCHECK2(*buf, size);
335 return;
336 trunc:
337 ND_PRINT((ndo, "%s", tstr));
338 }
339