The Tcpdump Group git mirrors - tcpdump/blob - print-m3ua.c

   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 #include "netdissect.h"
  36 #include "extract.h"
  37
  38 static const char tstr[] = " [|m3ua]";
  39
  40 #define M3UA_REL_1_0 1
  41
  42 struct 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
  50 struct 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
  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 Management"},
  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 invalid;
 222     ND_TCHECK_LEN(buf, size);
 223     ND_PRINT("0x%08x", EXTRACT_BE_U_4(buf));
 224     break;
 225   /* ... */
 226   default:
 227     ND_PRINT("(length %u)", size + (u_int)sizeof(struct m3ua_param_header));
 228     ND_TCHECK_LEN(buf, size);
 229   }
 230   return;
 231
 232 invalid:
 233   ND_PRINT("%s", istr);
 234   ND_TCHECK_LEN(buf, size);
 235   return;
 236 trunc:
 237   ND_PRINT("%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 invalid;
 263     ND_TCHECK_LEN(p, sizeof(struct m3ua_param_header));
 264     /* Parameter Tag */
 265     hdr_tag = EXTRACT_BE_U_2(p);
 266     ND_PRINT("\n\t\t\t%s: ", tok2str(ParamName, "Unknown Parameter (0x%04x)", hdr_tag));
 267     /* Parameter Length */
 268     hdr_len = EXTRACT_BE_U_2(p + 2);
 269     if (hdr_len < sizeof(struct m3ua_param_header))
 270       goto invalid;
 271     /* Parameter Value */
 272     align = (p + hdr_len - buf) % 4;
 273     align = align ? 4 - align : 0;
 274     ND_TCHECK_LEN(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 invalid:
 281   ND_PRINT("%s", istr);
 282   ND_TCHECK_LEN(buf, size);
 283   return;
 284 trunc:
 285   ND_PRINT("%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   uint8_t msg_class;
 306
 307   ndo->ndo_protocol = "m3ua";
 308   /* size includes the header */
 309   if (size < sizeof(struct m3ua_common_header))
 310     goto invalid;
 311   ND_TCHECK_SIZE(hdr);
 312   if (EXTRACT_U_1(hdr->v) != M3UA_REL_1_0)
 313     return;
 314
 315   msg_class = EXTRACT_U_1(hdr->msg_class);
 316   dict =
 317     msg_class == M3UA_MSGC_MGMT     ? MgmtMessages :
 318     msg_class == M3UA_MSGC_TRANSFER ? TransferMessages :
 319     msg_class == M3UA_MSGC_SSNM     ? SS7Messages :
 320     msg_class == M3UA_MSGC_ASPSM    ? ASPStateMessages :
 321     msg_class == M3UA_MSGC_ASPTM    ? ASPTrafficMessages :
 322     msg_class == M3UA_MSGC_RKM      ? RoutingKeyMgmtMessages :
 323     NULL;
 324
 325   ND_PRINT("\n\t\t%s", tok2str(MessageClasses, "Unknown message class %i", msg_class));
 326   if (dict != NULL)
 327     ND_PRINT(" %s Message", tok2str(dict, "Unknown (0x%02x)", EXTRACT_U_1(hdr->msg_type)));
 328
 329   if (size != EXTRACT_BE_U_4(hdr->len))
 330     ND_PRINT("\n\t\t\t@@@@@@ Corrupted length %u of message @@@@@@", EXTRACT_BE_U_4(hdr->len));
 331   else
 332     m3ua_tags_print(ndo, buf + sizeof(struct m3ua_common_header),
 333                     EXTRACT_BE_U_4(hdr->len) - sizeof(struct m3ua_common_header));
 334   return;
 335
 336 invalid:
 337   ND_PRINT("%s", istr);
 338   ND_TCHECK_LEN(buf, size);
 339   return;
 340 trunc:
 341   ND_PRINT("%s", tstr);
 342 }
 343