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/* \summary: Message Transfer Part 3 (MTP3) User Adaptation Layer (M3UA) printer */
26
27/* RFC 4666 */
28
29#ifdef HAVE_CONFIG_H
30#include <config.h>
31#endif
32
33#include "netdissect-stdinc.h"
34
35#define ND_LONGJMP_FROM_TCHECK
36#include "netdissect.h"
37#include "extract.h"
38
39
40#define M3UA_REL_1_0 1
41
42struct m3ua_common_header {
43  nd_uint8_t  v;
44  nd_uint8_t  reserved;
45  nd_uint8_t  msg_class;
46  nd_uint8_t  msg_type;
47  nd_uint32_t len;
48};
49
50struct m3ua_param_header {
51  nd_uint16_t tag;
52  nd_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
64static 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 Management"},
71	{ 0, NULL }
72};
73
74/* management messages */
75#define M3UA_MGMT_ERROR 0
76#define M3UA_MGMT_NOTIFY 1
77
78static 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
87static 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
100static 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
118static 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
134static 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
148static 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
156static const struct uint_tokary m3ua_msgc2tokary[] = {
157	{ M3UA_MSGC_MGMT,     MgmtMessages           },
158	{ M3UA_MSGC_TRANSFER, TransferMessages       },
159	{ M3UA_MSGC_SSNM,     SS7Messages            },
160	{ M3UA_MSGC_ASPSM,    ASPStateMessages       },
161	{ M3UA_MSGC_ASPTM,    ASPTrafficMessages     },
162	{ M3UA_MSGC_RKM,      RoutingKeyMgmtMessages },
163	/* uint2tokary() does not use array termination. */
164};
165
166/* M3UA Parameters */
167#define M3UA_PARAM_INFO 0x0004
168#define M3UA_PARAM_ROUTING_CTX 0x0006
169#define M3UA_PARAM_DIAGNOSTIC 0x0007
170#define M3UA_PARAM_HB_DATA 0x0009
171#define M3UA_PARAM_TRAFFIC_MODE_TYPE 0x000b
172#define M3UA_PARAM_ERROR_CODE 0x000c
173#define M3UA_PARAM_STATUS 0x000d
174#define M3UA_PARAM_ASP_ID 0x0011
175#define M3UA_PARAM_AFFECTED_POINT_CODE 0x0012
176#define M3UA_PARAM_CORR_ID 0x0013
177
178#define M3UA_PARAM_NETWORK_APPEARANCE 0x0200
179#define M3UA_PARAM_USER 0x0204
180#define M3UA_PARAM_CONGESTION_INDICATION 0x0205
181#define M3UA_PARAM_CONCERNED_DST 0x0206
182#define M3UA_PARAM_ROUTING_KEY 0x0207
183#define M3UA_PARAM_REG_RESULT 0x0208
184#define M3UA_PARAM_DEREG_RESULT 0x0209
185#define M3UA_PARAM_LOCAL_ROUTING_KEY_ID 0x020a
186#define M3UA_PARAM_DST_POINT_CODE 0x020b
187#define M3UA_PARAM_SI 0x020c
188#define M3UA_PARAM_ORIGIN_POINT_CODE_LIST 0x020e
189#define M3UA_PARAM_PROTO_DATA 0x0210
190#define M3UA_PARAM_REG_STATUS 0x0212
191#define M3UA_PARAM_DEREG_STATUS 0x0213
192
193static const struct tok ParamName[] = {
194  { M3UA_PARAM_INFO, "INFO String" },
195  { M3UA_PARAM_ROUTING_CTX, "Routing Context" },
196  { M3UA_PARAM_DIAGNOSTIC, "Diagnostic Info" },
197  { M3UA_PARAM_HB_DATA, "Heartbeat Data" },
198  { M3UA_PARAM_TRAFFIC_MODE_TYPE, "Traffic Mode Type" },
199  { M3UA_PARAM_ERROR_CODE, "Error Code" },
200  { M3UA_PARAM_STATUS, "Status" },
201  { M3UA_PARAM_ASP_ID, "ASP Identifier" },
202  { M3UA_PARAM_AFFECTED_POINT_CODE, "Affected Point Code" },
203  { M3UA_PARAM_CORR_ID, "Correlation ID" },
204  { M3UA_PARAM_NETWORK_APPEARANCE, "Network Appearance" },
205  { M3UA_PARAM_USER, "User/Cause" },
206  { M3UA_PARAM_CONGESTION_INDICATION, "Congestion Indications" },
207  { M3UA_PARAM_CONCERNED_DST, "Concerned Destination" },
208  { M3UA_PARAM_ROUTING_KEY, "Routing Key" },
209  { M3UA_PARAM_REG_RESULT, "Registration Result" },
210  { M3UA_PARAM_DEREG_RESULT, "Deregistration Result" },
211  { M3UA_PARAM_LOCAL_ROUTING_KEY_ID, "Local Routing Key Identifier" },
212  { M3UA_PARAM_DST_POINT_CODE, "Destination Point Code" },
213  { M3UA_PARAM_SI, "Service Indicators" },
214  { M3UA_PARAM_ORIGIN_POINT_CODE_LIST, "Originating Point Code List" },
215  { M3UA_PARAM_PROTO_DATA, "Protocol Data" },
216  { M3UA_PARAM_REG_STATUS, "Registration Status" },
217  { M3UA_PARAM_DEREG_STATUS, "Deregistration Status" },
218  { 0, NULL }
219};
220
221static void
222tag_value_print(netdissect_options *ndo,
223                const u_char *buf, const uint16_t tag, const uint16_t size)
224{
225  switch (tag) {
226  case M3UA_PARAM_NETWORK_APPEARANCE:
227  case M3UA_PARAM_ROUTING_CTX:
228  case M3UA_PARAM_CORR_ID:
229    /* buf and size don't include the header */
230    if (size < 4)
231      goto invalid;
232    ND_PRINT("0x%08x", GET_BE_U_4(buf));
233    break;
234  /* ... */
235  default:
236    ND_PRINT("(length %zu)", size + sizeof(struct m3ua_param_header));
237  }
238  ND_TCHECK_LEN(buf, size);
239  return;
240
241invalid:
242  nd_print_invalid(ndo);
243  ND_TCHECK_LEN(buf, size);
244}
245
246/*
247 *     0                   1                   2                   3
248 *     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
249 *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
250 *    |          Parameter Tag        |       Parameter Length        |
251 *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
252 *    \                                                               \
253 *    /                       Parameter Value                         /
254 *    \                                                               \
255 *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
256 */
257static void
258m3ua_tags_print(netdissect_options *ndo,
259                const u_char *buf, const u_int size)
260{
261  const u_char *p = buf;
262  int align;
263  uint16_t hdr_tag;
264  uint16_t hdr_len;
265
266  while (p < buf + size) {
267    if (p + sizeof(struct m3ua_param_header) > buf + size)
268      goto invalid;
269    /* Parameter Tag */
270    hdr_tag = GET_BE_U_2(p);
271    ND_PRINT("\n\t\t\t%s: ", tok2str(ParamName, "Unknown Parameter (0x%04x)", hdr_tag));
272    /* Parameter Length */
273    hdr_len = GET_BE_U_2(p + 2);
274    if (hdr_len < sizeof(struct m3ua_param_header))
275      goto invalid;
276    /* Parameter Value */
277    align = (p + hdr_len - buf) % 4;
278    align = align ? 4 - align : 0;
279    ND_TCHECK_LEN(p, hdr_len + align);
280    tag_value_print(ndo, p, hdr_tag, hdr_len - sizeof(struct m3ua_param_header));
281    p += hdr_len + align;
282  }
283  return;
284
285invalid:
286  nd_print_invalid(ndo);
287  ND_TCHECK_LEN(buf, size);
288}
289
290/*
291 *     0                   1                   2                   3
292 *     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
293 *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
294 *    |    Version    |   Reserved    | Message Class | Message Type  |
295 *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
296 *    |                        Message Length                         |
297 *    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
298 *    \                                                               \
299 *    /                                                               /
300 */
301void
302m3ua_print(netdissect_options *ndo,
303           const u_char *buf, const u_int size)
304{
305  const struct m3ua_common_header *hdr = (const struct m3ua_common_header *) buf;
306  const struct tok *dict;
307  uint8_t msg_class;
308
309  ndo->ndo_protocol = "m3ua";
310  /* size includes the header */
311  if (size < sizeof(struct m3ua_common_header))
312    goto invalid;
313  ND_TCHECK_SIZE(hdr);
314  if (GET_U_1(hdr->v) != M3UA_REL_1_0)
315    return;
316
317  msg_class = GET_U_1(hdr->msg_class);
318  dict = uint2tokary(m3ua_msgc2tokary, msg_class);
319
320  ND_PRINT("\n\t\t%s", tok2str(MessageClasses, "Unknown message class %i", msg_class));
321  if (dict != NULL)
322    ND_PRINT(" %s Message",
323             tok2str(dict, "Unknown (0x%02x)", GET_U_1(hdr->msg_type)));
324
325  if (size != GET_BE_U_4(hdr->len))
326    ND_PRINT("\n\t\t\t@@@@@@ Corrupted length %u of message @@@@@@",
327             GET_BE_U_4(hdr->len));
328  else
329    m3ua_tags_print(ndo, buf + sizeof(struct m3ua_common_header),
330                    GET_BE_U_4(hdr->len) - sizeof(struct m3ua_common_header));
331  return;
332
333invalid:
334  nd_print_invalid(ndo);
335  ND_TCHECK_LEN(buf, size);
336}
337
338