external/bsd/tcpdump/dist/print-atm.c

   1 /*
   2  * Copyright (c) 1994, 1995, 1996, 1997
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that: (1) source code distributions
   7  * retain the above copyright notice and this paragraph in its entirety, (2)
   8  * distributions including binary code include the above copyright notice and
   9  * this paragraph in its entirety in the documentation or other materials
  10  * provided with the distribution, and (3) all advertising materials mentioning
  11  * features or use of this software display the following acknowledgement:
  12  * ``This product includes software developed by the University of California,
  13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  14  * the University nor the names of its contributors may be used to endorse
  15  * or promote products derived from this software without specific prior
  16  * written permission.
  17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  20  */
  21
  22 #include <sys/cdefs.h>
  23 #ifndef lint
  24 __RCSID("$NetBSD: print-atm.c,v 1.6 2015/03/31 21:59:35 christos Exp $");
  25 #endif
  26
  27 #define NETDISSECT_REWORKED
  28 #ifdef HAVE_CONFIG_H
  29 #include "config.h"
  30 #endif
  31
  32 #include <tcpdump-stdinc.h>
  33
  34 #include "interface.h"
  35 #include "extract.h"
  36 #include "addrtoname.h"
  37 #include "atm.h"
  38 #include "atmuni31.h"
  39 #include "llc.h"
  40
  41 static const char tstr[] = "[|atm]";
  42
  43 #define OAM_CRC10_MASK 0x3ff
  44 #define OAM_PAYLOAD_LEN 48
  45 #define OAM_FUNCTION_SPECIFIC_LEN 45 /* this excludes crc10 and cell-type/function-type */
  46 #define OAM_CELLTYPE_FUNCTYPE_LEN 1
  47
  48 static const struct tok oam_f_values[] = {
  49     { VCI_OAMF4SC, "OAM F4 (segment)" },
  50     { VCI_OAMF4EC, "OAM F4 (end)" },
  51     { 0, NULL }
  52 };
  53
  54 static const struct tok atm_pty_values[] = {
  55     { 0x0, "user data, uncongested, SDU 0" },
  56     { 0x1, "user data, uncongested, SDU 1" },
  57     { 0x2, "user data, congested, SDU 0" },
  58     { 0x3, "user data, congested, SDU 1" },
  59     { 0x4, "VCC OAM F5 flow segment" },
  60     { 0x5, "VCC OAM F5 flow end-to-end" },
  61     { 0x6, "Traffic Control and resource Mgmt" },
  62     { 0, NULL }
  63 };
  64
  65 #define OAM_CELLTYPE_FM 0x1
  66 #define OAM_CELLTYPE_PM 0x2
  67 #define OAM_CELLTYPE_AD 0x8
  68 #define OAM_CELLTYPE_SM 0xf
  69
  70 static const struct tok oam_celltype_values[] = {
  71     { OAM_CELLTYPE_FM, "Fault Management" },
  72     { OAM_CELLTYPE_PM, "Performance Management" },
  73     { OAM_CELLTYPE_AD, "activate/deactivate" },
  74     { OAM_CELLTYPE_SM, "System Management" },
  75     { 0, NULL }
  76 };
  77
  78 #define OAM_FM_FUNCTYPE_AIS       0x0
  79 #define OAM_FM_FUNCTYPE_RDI       0x1
  80 #define OAM_FM_FUNCTYPE_CONTCHECK 0x4
  81 #define OAM_FM_FUNCTYPE_LOOPBACK  0x8
  82
  83 static const struct tok oam_fm_functype_values[] = {
  84     { OAM_FM_FUNCTYPE_AIS, "AIS" },
  85     { OAM_FM_FUNCTYPE_RDI, "RDI" },
  86     { OAM_FM_FUNCTYPE_CONTCHECK, "Continuity Check" },
  87     { OAM_FM_FUNCTYPE_LOOPBACK, "Loopback" },
  88     { 0, NULL }
  89 };
  90
  91 static const struct tok oam_pm_functype_values[] = {
  92     { 0x0, "Forward Monitoring" },
  93     { 0x1, "Backward Reporting" },
  94     { 0x2, "Monitoring and Reporting" },
  95     { 0, NULL }
  96 };
  97
  98 static const struct tok oam_ad_functype_values[] = {
  99     { 0x0, "Performance Monitoring" },
 100     { 0x1, "Continuity Check" },
 101     { 0, NULL }
 102 };
 103
 104 #define OAM_FM_LOOPBACK_INDICATOR_MASK 0x1
 105
 106 static const struct tok oam_fm_loopback_indicator_values[] = {
 107     { 0x0, "Reply" },
 108     { 0x1, "Request" },
 109     { 0, NULL }
 110 };
 111
 112 static const struct tok *oam_functype_values[16] = {
 113     NULL,
 114     oam_fm_functype_values, /* 1 */
 115     oam_pm_functype_values, /* 2 */
 116     NULL,
 117     NULL,
 118     NULL,
 119     NULL,
 120     NULL,
 121     oam_ad_functype_values, /* 8 */
 122     NULL,
 123     NULL,
 124     NULL,
 125     NULL,
 126     NULL,
 127     NULL,
 128     NULL
 129 };
 130
 131 /*
 132  * Print an RFC 1483 LLC-encapsulated ATM frame.
 133  */
 134 static void
 135 atm_llc_print(netdissect_options *ndo,
 136               const u_char *p, int length, int caplen)
 137 {
 138         u_short extracted_ethertype;
 139
 140         if (!llc_print(ndo, p, length, caplen, NULL, NULL,
 141             &extracted_ethertype)) {
 142                 /* ether_type not known, print raw packet */
 143                 if (extracted_ethertype) {
 144                         ND_PRINT((ndo, "(LLC %s) ",
 145                 etherproto_string(htons(extracted_ethertype))));
 146                 }
 147                 if (!ndo->ndo_suppress_default_print)
 148                         ND_DEFAULTPRINT(p, caplen);
 149         }
 150 }
 151
 152 /*
 153  * Given a SAP value, generate the LLC header value for a UI packet
 154  * with that SAP as the source and destination SAP.
 155  */
 156 #define LLC_UI_HDR(sap) ((sap)<<16 | (sap<<8) | 0x03)
 157
 158 /*
 159  * This is the top level routine of the printer.  'p' points
 160  * to the LLC/SNAP header of the packet, 'h->ts' is the timestamp,
 161  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 162  * is the number of bytes actually captured.
 163  */
 164 u_int
 165 atm_if_print(netdissect_options *ndo,
 166              const struct pcap_pkthdr *h, const u_char *p)
 167 {
 168         u_int caplen = h->caplen;
 169         u_int length = h->len;
 170         uint32_t llchdr;
 171         u_int hdrlen = 0;
 172
 173         if (caplen < 1 || length < 1) {
 174                 ND_PRINT((ndo, "%s", tstr));
 175                 return (caplen);
 176         }
 177
 178         /* Cisco Style NLPID ? */
 179         if (*p == LLC_UI) {
 180             if (ndo->ndo_eflag)
 181                 ND_PRINT((ndo, "CNLPID "));
 182             isoclns_print(ndo, p + 1, length - 1, caplen - 1);
 183             return hdrlen;
 184         }
 185
 186         /*
 187          * Must have at least a DSAP, an SSAP, and the first byte of the
 188          * control field.
 189          */
 190         if (caplen < 3 || length < 3) {
 191                 ND_PRINT((ndo, "%s", tstr));
 192                 return (caplen);
 193         }
 194
 195         /*
 196          * Extract the presumed LLC header into a variable, for quick
 197          * testing.
 198          * Then check for a header that's neither a header for a SNAP
 199          * packet nor an RFC 2684 routed NLPID-formatted PDU nor
 200          * an 802.2-but-no-SNAP IP packet.
 201          */
 202         llchdr = EXTRACT_24BITS(p);
 203         if (llchdr != LLC_UI_HDR(LLCSAP_SNAP) &&
 204             llchdr != LLC_UI_HDR(LLCSAP_ISONS) &&
 205             llchdr != LLC_UI_HDR(LLCSAP_IP)) {
 206                 /*
 207                  * XXX - assume 802.6 MAC header from Fore driver.
 208                  *
 209                  * Unfortunately, the above list doesn't check for
 210                  * all known SAPs, doesn't check for headers where
 211                  * the source and destination SAP aren't the same,
 212                  * and doesn't check for non-UI frames.  It also
 213                  * runs the risk of an 802.6 MAC header that happens
 214                  * to begin with one of those values being
 215                  * incorrectly treated as an 802.2 header.
 216                  *
 217                  * So is that Fore driver still around?  And, if so,
 218                  * is it still putting 802.6 MAC headers on ATM
 219                  * packets?  If so, could it be changed to use a
 220                  * new DLT_IEEE802_6 value if we added it?
 221                  */
 222                 if (caplen < 20 || length < 20) {
 223                         ND_PRINT((ndo, "%s", tstr));
 224                         return (caplen);
 225                 }
 226                 if (ndo->ndo_eflag)
 227                         ND_PRINT((ndo, "%08x%08x %08x%08x ",
 228                                EXTRACT_32BITS(p),
 229                                EXTRACT_32BITS(p+4),
 230                                EXTRACT_32BITS(p+8),
 231                                EXTRACT_32BITS(p+12)));
 232                 p += 20;
 233                 length -= 20;
 234                 caplen -= 20;
 235                 hdrlen += 20;
 236         }
 237         atm_llc_print(ndo, p, length, caplen);
 238         return (hdrlen);
 239 }
 240
 241 /*
 242  * ATM signalling.
 243  */
 244 static const struct tok msgtype2str[] = {
 245         { CALL_PROCEED,         "Call_proceeding" },
 246         { CONNECT,              "Connect" },
 247         { CONNECT_ACK,          "Connect_ack" },
 248         { SETUP,                "Setup" },
 249         { RELEASE,              "Release" },
 250         { RELEASE_DONE,         "Release_complete" },
 251         { RESTART,              "Restart" },
 252         { RESTART_ACK,          "Restart_ack" },
 253         { STATUS,               "Status" },
 254         { STATUS_ENQ,           "Status_enquiry" },
 255         { ADD_PARTY,            "Add_party" },
 256         { ADD_PARTY_ACK,        "Add_party_ack" },
 257         { ADD_PARTY_REJ,        "Add_party_reject" },
 258         { DROP_PARTY,           "Drop_party" },
 259         { DROP_PARTY_ACK,       "Drop_party_ack" },
 260         { 0,                    NULL }
 261 };
 262
 263 static void
 264 sig_print(netdissect_options *ndo,
 265           const u_char *p, int caplen)
 266 {
 267         uint32_t call_ref;
 268
 269         if (caplen < PROTO_POS) {
 270                 ND_PRINT((ndo, "%s", tstr));
 271                 return;
 272         }
 273         if (p[PROTO_POS] == Q2931) {
 274                 /*
 275                  * protocol:Q.2931 for User to Network Interface
 276                  * (UNI 3.1) signalling
 277                  */
 278                 ND_PRINT((ndo, "Q.2931"));
 279                 if (caplen < MSG_TYPE_POS) {
 280                         ND_PRINT((ndo, " %s", tstr));
 281                         return;
 282                 }
 283                 ND_PRINT((ndo, ":%s ",
 284                     tok2str(msgtype2str, "msgtype#%d", p[MSG_TYPE_POS])));
 285
 286                 /*
 287                  * The call reference comes before the message type,
 288                  * so if we know we have the message type, which we
 289                  * do from the caplen test above, we also know we have
 290                  * the call reference.
 291                  */
 292                 call_ref = EXTRACT_24BITS(&p[CALL_REF_POS]);
 293                 ND_PRINT((ndo, "CALL_REF:0x%06x", call_ref));
 294         } else {
 295                 /* SCCOP with some unknown protocol atop it */
 296                 ND_PRINT((ndo, "SSCOP, proto %d ", p[PROTO_POS]));
 297         }
 298 }
 299
 300 /*
 301  * Print an ATM PDU (such as an AAL5 PDU).
 302  */
 303 void
 304 atm_print(netdissect_options *ndo,
 305           u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length,
 306           u_int caplen)
 307 {
 308         if (ndo->ndo_eflag)
 309                 ND_PRINT((ndo, "VPI:%u VCI:%u ", vpi, vci));
 310
 311         if (vpi == 0) {
 312                 switch (vci) {
 313
 314                 case VCI_PPC:
 315                         sig_print(ndo, p, caplen);
 316                         return;
 317
 318                 case VCI_BCC:
 319                         ND_PRINT((ndo, "broadcast sig: "));
 320                         return;
 321
 322                 case VCI_OAMF4SC: /* fall through */
 323                 case VCI_OAMF4EC:
 324                         oam_print(ndo, p, length, ATM_OAM_HEC);
 325                         return;
 326
 327                 case VCI_METAC:
 328                         ND_PRINT((ndo, "meta: "));
 329                         return;
 330
 331                 case VCI_ILMIC:
 332                         ND_PRINT((ndo, "ilmi: "));
 333                         snmp_print(ndo, p, length);
 334                         return;
 335                 }
 336         }
 337
 338         switch (traftype) {
 339
 340         case ATM_LLC:
 341         default:
 342                 /*
 343                  * Assumes traffic is LLC if unknown.
 344                  */
 345                 atm_llc_print(ndo, p, length, caplen);
 346                 break;
 347
 348         case ATM_LANE:
 349                 lane_print(ndo, p, length, caplen);
 350                 break;
 351         }
 352 }
 353
 354 struct oam_fm_loopback_t {
 355     uint8_t loopback_indicator;
 356     uint8_t correlation_tag[4];
 357     uint8_t loopback_id[12];
 358     uint8_t source_id[12];
 359     uint8_t unused[16];
 360 };
 361
 362 struct oam_fm_ais_rdi_t {
 363     uint8_t failure_type;
 364     uint8_t failure_location[16];
 365     uint8_t unused[28];
 366 };
 367
 368 int
 369 oam_print (netdissect_options *ndo,
 370            const u_char *p, u_int length, u_int hec)
 371 {
 372     uint32_t cell_header;
 373     uint16_t vpi, vci, cksum, cksum_shouldbe, idx;
 374     uint8_t  cell_type, func_type, payload, clp;
 375
 376     union {
 377         const struct oam_fm_loopback_t *oam_fm_loopback;
 378         const struct oam_fm_ais_rdi_t *oam_fm_ais_rdi;
 379     } oam_ptr;
 380
 381
 382     cell_header = EXTRACT_32BITS(p+hec);
 383     cell_type = ((*(p+ATM_HDR_LEN_NOHEC+hec))>>4) & 0x0f;
 384     func_type = (*(p+ATM_HDR_LEN_NOHEC+hec)) & 0x0f;
 385
 386     vpi = (cell_header>>20)&0xff;
 387     vci = (cell_header>>4)&0xffff;
 388     payload = (cell_header>>1)&0x7;
 389     clp = cell_header&0x1;
 390
 391     ND_PRINT((ndo, "%s, vpi %u, vci %u, payload [ %s ], clp %u, length %u",
 392            tok2str(oam_f_values, "OAM F5", vci),
 393            vpi, vci,
 394            tok2str(atm_pty_values, "Unknown", payload),
 395            clp, length));
 396
 397     if (!ndo->ndo_vflag) {
 398         return 1;
 399     }
 400
 401     ND_PRINT((ndo, "\n\tcell-type %s (%u)",
 402            tok2str(oam_celltype_values, "unknown", cell_type),
 403            cell_type));
 404
 405     if (oam_functype_values[cell_type] == NULL)
 406         ND_PRINT((ndo, ", func-type unknown (%u)", func_type));
 407     else
 408         ND_PRINT((ndo, ", func-type %s (%u)",
 409                tok2str(oam_functype_values[cell_type],"none",func_type),
 410                func_type));
 411
 412     p += ATM_HDR_LEN_NOHEC + hec;
 413
 414     switch (cell_type << 4 | func_type) {
 415     case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_LOOPBACK):
 416         oam_ptr.oam_fm_loopback = (const struct oam_fm_loopback_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN);
 417         ND_PRINT((ndo, "\n\tLoopback-Indicator %s, Correlation-Tag 0x%08x",
 418                tok2str(oam_fm_loopback_indicator_values,
 419                        "Unknown",
 420                        oam_ptr.oam_fm_loopback->loopback_indicator & OAM_FM_LOOPBACK_INDICATOR_MASK),
 421                EXTRACT_32BITS(&oam_ptr.oam_fm_loopback->correlation_tag)));
 422         ND_PRINT((ndo, "\n\tLocation-ID "));
 423         for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->loopback_id); idx++) {
 424             if (idx % 2) {
 425                 ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_loopback->loopback_id[idx])));
 426             }
 427         }
 428         ND_PRINT((ndo, "\n\tSource-ID   "));
 429         for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->source_id); idx++) {
 430             if (idx % 2) {
 431                 ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_loopback->source_id[idx])));
 432             }
 433         }
 434         break;
 435
 436     case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_AIS):
 437     case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_RDI):
 438         oam_ptr.oam_fm_ais_rdi = (const struct oam_fm_ais_rdi_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN);
 439         ND_PRINT((ndo, "\n\tFailure-type 0x%02x", oam_ptr.oam_fm_ais_rdi->failure_type));
 440         ND_PRINT((ndo, "\n\tLocation-ID "));
 441         for (idx = 0; idx < sizeof(oam_ptr.oam_fm_ais_rdi->failure_location); idx++) {
 442             if (idx % 2) {
 443                 ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_ais_rdi->failure_location[idx])));
 444             }
 445         }
 446         break;
 447
 448     case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_CONTCHECK):
 449         /* FIXME */
 450         break;
 451
 452     default:
 453         break;
 454     }
 455
 456     /* crc10 checksum verification */
 457     cksum = EXTRACT_16BITS(p + OAM_CELLTYPE_FUNCTYPE_LEN + OAM_FUNCTION_SPECIFIC_LEN)
 458         & OAM_CRC10_MASK;
 459     cksum_shouldbe = verify_crc10_cksum(0, p, OAM_PAYLOAD_LEN);
 460
 461     ND_PRINT((ndo, "\n\tcksum 0x%03x (%scorrect)",
 462            cksum,
 463            cksum_shouldbe == 0 ? "" : "in"));
 464
 465     return 1;
 466 }