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

   1 /*
   2  * Copyright (C) Arnaldo Carvalho de Melo 2004
   3  * Copyright (C) Ian McDonald 2005
   4  * Copyright (C) Yoshifumi Nishida 2005
   5  *
   6  * This software may be distributed either under the terms of the
   7  * BSD-style license that accompanies tcpdump or the GNU GPL version 2
   8  */
   9
  10 #include <sys/cdefs.h>
  11 #ifndef lint
  12 __RCSID("$NetBSD: print-dccp.c,v 1.5 2015/03/31 21:59:35 christos Exp $");
  13 #endif
  14
  15 #define NETDISSECT_REWORKED
  16 #ifdef HAVE_CONFIG_H
  17 #include "config.h"
  18 #endif
  19
  20 #include <tcpdump-stdinc.h>
  21
  22 #include <stdio.h>
  23 #include <string.h>
  24
  25 #include "interface.h"
  26 #include "addrtoname.h"
  27 #include "extract.h"                    /* must come after interface.h */
  28 #include "ip.h"
  29 #ifdef INET6
  30 #include "ip6.h"
  31 #endif
  32 #include "ipproto.h"
  33
  34 /* RFC4340: Datagram Congestion Control Protocol (DCCP) */
  35
  36 /**
  37  * struct dccp_hdr - generic part of DCCP packet header, with a 24-bit
  38  * sequence number
  39  *
  40  * @dccph_sport - Relevant port on the endpoint that sent this packet
  41  * @dccph_dport - Relevant port on the other endpoint
  42  * @dccph_doff - Data Offset from the start of the DCCP header, in 32-bit words
  43  * @dccph_ccval - Used by the HC-Sender CCID
  44  * @dccph_cscov - Parts of the packet that are covered by the Checksum field
  45  * @dccph_checksum - Internet checksum, depends on dccph_cscov
  46  * @dccph_x - 0 = 24 bit sequence number, 1 = 48
  47  * @dccph_type - packet type, see DCCP_PKT_ prefixed macros
  48  * @dccph_seq - 24-bit sequence number
  49  */
  50 struct dccp_hdr {
  51         uint16_t        dccph_sport,
  52                         dccph_dport;
  53         uint8_t         dccph_doff;
  54         uint8_t         dccph_ccval_cscov;
  55         uint16_t        dccph_checksum;
  56         uint8_t         dccph_xtr;
  57         uint8_t         dccph_seq[3];
  58 } UNALIGNED;
  59
  60 /**
  61  * struct dccp_hdr_ext - generic part of DCCP packet header, with a 48-bit
  62  * sequence number
  63  *
  64  * @dccph_sport - Relevant port on the endpoint that sent this packet
  65  * @dccph_dport - Relevant port on the other endpoint
  66  * @dccph_doff - Data Offset from the start of the DCCP header, in 32-bit words
  67  * @dccph_ccval - Used by the HC-Sender CCID
  68  * @dccph_cscov - Parts of the packet that are covered by the Checksum field
  69  * @dccph_checksum - Internet checksum, depends on dccph_cscov
  70  * @dccph_x - 0 = 24 bit sequence number, 1 = 48
  71  * @dccph_type - packet type, see DCCP_PKT_ prefixed macros
  72  * @dccph_seq - 48-bit sequence number
  73  */
  74 struct dccp_hdr_ext {
  75         uint16_t        dccph_sport,
  76                         dccph_dport;
  77         uint8_t         dccph_doff;
  78         uint8_t         dccph_ccval_cscov;
  79         uint16_t        dccph_checksum;
  80         uint8_t         dccph_xtr;
  81         uint8_t         reserved;
  82         uint8_t         dccph_seq[6];
  83 } UNALIGNED;
  84
  85 #define DCCPH_CCVAL(dh) (((dh)->dccph_ccval_cscov >> 4) & 0xF)
  86 #define DCCPH_CSCOV(dh) (((dh)->dccph_ccval_cscov) & 0xF)
  87
  88 #define DCCPH_X(dh)     ((dh)->dccph_xtr & 1)
  89 #define DCCPH_TYPE(dh)  (((dh)->dccph_xtr >> 1) & 0xF)
  90
  91 /**
  92  * struct dccp_hdr_request - Conection initiation request header
  93  *
  94  * @dccph_req_service - Service to which the client app wants to connect
  95  */
  96 struct dccp_hdr_request {
  97         uint32_t        dccph_req_service;
  98 } UNALIGNED;
  99
 100 /**
 101  * struct dccp_hdr_response - Conection initiation response header
 102  *
 103  * @dccph_resp_ack - 48 bit ack number, contains GSR
 104  * @dccph_resp_service - Echoes the Service Code on a received DCCP-Request
 105  */
 106 struct dccp_hdr_response {
 107         uint8_t                         dccph_resp_ack[8];      /* always 8 bytes */
 108         uint32_t                        dccph_resp_service;
 109 } UNALIGNED;
 110
 111 /**
 112  * struct dccp_hdr_reset - Unconditionally shut down a connection
 113  *
 114  * @dccph_resp_ack - 48 bit ack number
 115  * @dccph_reset_service - Echoes the Service Code on a received DCCP-Request
 116  */
 117 struct dccp_hdr_reset {
 118         uint8_t                         dccph_reset_ack[8];     /* always 8 bytes */
 119         uint8_t                         dccph_reset_code,
 120                                         dccph_reset_data[3];
 121 } UNALIGNED;
 122
 123 enum dccp_pkt_type {
 124         DCCP_PKT_REQUEST = 0,
 125         DCCP_PKT_RESPONSE,
 126         DCCP_PKT_DATA,
 127         DCCP_PKT_ACK,
 128         DCCP_PKT_DATAACK,
 129         DCCP_PKT_CLOSEREQ,
 130         DCCP_PKT_CLOSE,
 131         DCCP_PKT_RESET,
 132         DCCP_PKT_SYNC,
 133         DCCP_PKT_SYNCACK
 134 };
 135
 136 static const struct tok dccp_pkt_type_str[] = {
 137         { DCCP_PKT_REQUEST, "DCCP-Request" },
 138         { DCCP_PKT_RESPONSE, "DCCP-Response" },
 139         { DCCP_PKT_DATA, "DCCP-Data" },
 140         { DCCP_PKT_ACK, "DCCP-Ack" },
 141         { DCCP_PKT_DATAACK, "DCCP-DataAck" },
 142         { DCCP_PKT_CLOSEREQ, "DCCP-CloseReq" },
 143         { DCCP_PKT_CLOSE, "DCCP-Close" },
 144         { DCCP_PKT_RESET, "DCCP-Reset" },
 145         { DCCP_PKT_SYNC, "DCCP-Sync" },
 146         { DCCP_PKT_SYNCACK, "DCCP-SyncAck" },
 147         { 0, NULL}
 148 };
 149
 150 enum dccp_reset_codes {
 151         DCCP_RESET_CODE_UNSPECIFIED = 0,
 152         DCCP_RESET_CODE_CLOSED,
 153         DCCP_RESET_CODE_ABORTED,
 154         DCCP_RESET_CODE_NO_CONNECTION,
 155         DCCP_RESET_CODE_PACKET_ERROR,
 156         DCCP_RESET_CODE_OPTION_ERROR,
 157         DCCP_RESET_CODE_MANDATORY_ERROR,
 158         DCCP_RESET_CODE_CONNECTION_REFUSED,
 159         DCCP_RESET_CODE_BAD_SERVICE_CODE,
 160         DCCP_RESET_CODE_TOO_BUSY,
 161         DCCP_RESET_CODE_BAD_INIT_COOKIE,
 162         DCCP_RESET_CODE_AGGRESSION_PENALTY,
 163         __DCCP_RESET_CODE_LAST
 164 };
 165
 166 static const char tstr[] = "[|dccp]";
 167
 168 static const char *dccp_reset_codes[] = {
 169         "unspecified",
 170         "closed",
 171         "aborted",
 172         "no_connection",
 173         "packet_error",
 174         "option_error",
 175         "mandatory_error",
 176         "connection_refused",
 177         "bad_service_code",
 178         "too_busy",
 179         "bad_init_cookie",
 180         "aggression_penalty",
 181 };
 182
 183 static const char *dccp_feature_nums[] = {
 184         "reserved",
 185         "ccid",
 186         "allow_short_seqno",
 187         "sequence_window",
 188         "ecn_incapable",
 189         "ack_ratio",
 190         "send_ack_vector",
 191         "send_ndp_count",
 192         "minimum checksum coverage",
 193         "check data checksum",
 194 };
 195
 196 static inline u_int dccp_csum_coverage(const struct dccp_hdr* dh, u_int len)
 197 {
 198         u_int cov;
 199
 200         if (DCCPH_CSCOV(dh) == 0)
 201                 return len;
 202         cov = (dh->dccph_doff + DCCPH_CSCOV(dh) - 1) * sizeof(uint32_t);
 203         return (cov > len)? len : cov;
 204 }
 205
 206 static int dccp_cksum(netdissect_options *ndo, const struct ip *ip,
 207         const struct dccp_hdr *dh, u_int len)
 208 {
 209         return nextproto4_cksum(ndo, ip, (const uint8_t *)(void *)dh, len,
 210                                 dccp_csum_coverage(dh, len), IPPROTO_DCCP);
 211 }
 212
 213 #ifdef INET6
 214 static int dccp6_cksum(const struct ip6_hdr *ip6, const struct dccp_hdr *dh, u_int len)
 215 {
 216         return nextproto6_cksum(ip6, (const uint8_t *)(void *)dh, len,
 217                                 dccp_csum_coverage(dh, len), IPPROTO_DCCP);
 218 }
 219 #endif
 220
 221 static const char *dccp_reset_code(uint8_t code)
 222 {
 223         if (code >= __DCCP_RESET_CODE_LAST)
 224                 return "invalid";
 225         return dccp_reset_codes[code];
 226 }
 227
 228 static uint64_t dccp_seqno(const u_char *bp)
 229 {
 230         const struct dccp_hdr *dh = (const struct dccp_hdr *)bp;
 231         uint64_t seqno;
 232
 233         if (DCCPH_X(dh) != 0) {
 234                 const struct dccp_hdr_ext *dhx = (const struct dccp_hdr_ext *)bp;
 235                 seqno = EXTRACT_48BITS(dhx->dccph_seq);
 236         } else {
 237                 seqno = EXTRACT_24BITS(dh->dccph_seq);
 238         }
 239
 240         return seqno;
 241 }
 242
 243 static inline unsigned int dccp_basic_hdr_len(const struct dccp_hdr *dh)
 244 {
 245         return DCCPH_X(dh) ? sizeof(struct dccp_hdr_ext) : sizeof(struct dccp_hdr);
 246 }
 247
 248 static void dccp_print_ack_no(netdissect_options *ndo, const u_char *bp)
 249 {
 250         const struct dccp_hdr *dh = (const struct dccp_hdr *)bp;
 251         const u_char *ackp = bp + dccp_basic_hdr_len(dh);
 252         uint64_t ackno;
 253
 254         if (DCCPH_X(dh) != 0) {
 255                 ND_TCHECK2(*ackp, 8);
 256                 ackno = EXTRACT_48BITS(ackp + 2);
 257         } else {
 258                 ND_TCHECK2(*ackp, 4);
 259                 ackno = EXTRACT_24BITS(ackp + 1);
 260         }
 261
 262         ND_PRINT((ndo, "(ack=%" PRIu64 ") ", ackno));
 263 trunc:
 264         return;
 265 }
 266
 267 static int dccp_print_option(netdissect_options *, const u_char *, u_int);
 268
 269 /**
 270  * dccp_print - show dccp packet
 271  * @bp - beginning of dccp packet
 272  * @data2 - beginning of enclosing
 273  * @len - lenght of ip packet
 274  */
 275 void dccp_print(netdissect_options *ndo, const u_char *bp, const u_char *data2,
 276                 u_int len)
 277 {
 278         const struct dccp_hdr *dh;
 279         const struct ip *ip;
 280 #ifdef INET6
 281         const struct ip6_hdr *ip6;
 282 #endif
 283         const u_char *cp;
 284         u_short sport, dport;
 285         u_int hlen;
 286         u_int fixed_hdrlen;
 287         uint8_t dccph_type;
 288
 289         dh = (const struct dccp_hdr *)bp;
 290
 291         ip = (struct ip *)data2;
 292 #ifdef INET6
 293         if (IP_V(ip) == 6)
 294                 ip6 = (const struct ip6_hdr *)data2;
 295         else
 296                 ip6 = NULL;
 297 #endif /*INET6*/
 298
 299         /* make sure we have enough data to look at the X bit */
 300         cp = (const u_char *)(dh + 1);
 301         if (cp > ndo->ndo_snapend) {
 302                 ND_PRINT((ndo, "[Invalid packet|dccp]"));
 303                 return;
 304         }
 305         if (len < sizeof(struct dccp_hdr)) {
 306                 ND_PRINT((ndo, "truncated-dccp - %u bytes missing!",
 307                           len - (u_int)sizeof(struct dccp_hdr)));
 308                 return;
 309         }
 310
 311         /* get the length of the generic header */
 312         fixed_hdrlen = dccp_basic_hdr_len(dh);
 313         if (len < fixed_hdrlen) {
 314                 ND_PRINT((ndo, "truncated-dccp - %u bytes missing!",
 315                           len - fixed_hdrlen));
 316                 return;
 317         }
 318         ND_TCHECK2(*dh, fixed_hdrlen);
 319
 320         sport = EXTRACT_16BITS(&dh->dccph_sport);
 321         dport = EXTRACT_16BITS(&dh->dccph_dport);
 322         hlen = dh->dccph_doff * 4;
 323
 324 #ifdef INET6
 325         if (ip6) {
 326                 ND_PRINT((ndo, "%s.%d > %s.%d: ",
 327                           ip6addr_string(ndo, &ip6->ip6_src), sport,
 328                           ip6addr_string(ndo, &ip6->ip6_dst), dport));
 329         } else
 330 #endif /*INET6*/
 331         {
 332                 ND_PRINT((ndo, "%s.%d > %s.%d: ",
 333                           ipaddr_string(ndo, &ip->ip_src), sport,
 334                           ipaddr_string(ndo, &ip->ip_dst), dport));
 335         }
 336
 337         ND_PRINT((ndo, "DCCP"));
 338
 339         if (ndo->ndo_qflag) {
 340                 ND_PRINT((ndo, " %d", len - hlen));
 341                 if (hlen > len) {
 342                         ND_PRINT((ndo, " [bad hdr length %u - too long, > %u]",
 343                                   hlen, len));
 344                 }
 345                 return;
 346         }
 347
 348         /* other variables in generic header */
 349         if (ndo->ndo_vflag) {
 350                 ND_PRINT((ndo, " (CCVal %d, CsCov %d, ", DCCPH_CCVAL(dh), DCCPH_CSCOV(dh)));
 351         }
 352
 353         /* checksum calculation */
 354         if (ndo->ndo_vflag && ND_TTEST2(bp[0], len)) {
 355                 uint16_t sum = 0, dccp_sum;
 356
 357                 dccp_sum = EXTRACT_16BITS(&dh->dccph_checksum);
 358                 ND_PRINT((ndo, "cksum 0x%04x ", dccp_sum));
 359                 if (IP_V(ip) == 4)
 360                         sum = dccp_cksum(ndo, ip, dh, len);
 361 #ifdef INET6
 362                 else if (IP_V(ip) == 6)
 363                         sum = dccp6_cksum(ip6, dh, len);
 364 #endif
 365                 if (sum != 0)
 366                         ND_PRINT((ndo, "(incorrect -> 0x%04x)",in_cksum_shouldbe(dccp_sum, sum)));
 367                 else
 368                         ND_PRINT((ndo, "(correct)"));
 369         }
 370
 371         if (ndo->ndo_vflag)
 372                 ND_PRINT((ndo, ")"));
 373         ND_PRINT((ndo, " "));
 374
 375         dccph_type = DCCPH_TYPE(dh);
 376         switch (dccph_type) {
 377         case DCCP_PKT_REQUEST: {
 378                 struct dccp_hdr_request *dhr =
 379                         (struct dccp_hdr_request *)(bp + fixed_hdrlen);
 380                 fixed_hdrlen += 4;
 381                 if (len < fixed_hdrlen) {
 382                         ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
 383                                   tok2str(dccp_pkt_type_str, "", dccph_type),
 384                                   len - fixed_hdrlen));
 385                         return;
 386                 }
 387                 ND_TCHECK(*dhr);
 388                 ND_PRINT((ndo, "%s (service=%d) ",
 389                           tok2str(dccp_pkt_type_str, "", dccph_type),
 390                           EXTRACT_32BITS(&dhr->dccph_req_service)));
 391                 break;
 392         }
 393         case DCCP_PKT_RESPONSE: {
 394                 struct dccp_hdr_response *dhr =
 395                         (struct dccp_hdr_response *)(bp + fixed_hdrlen);
 396                 fixed_hdrlen += 12;
 397                 if (len < fixed_hdrlen) {
 398                         ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
 399                                   tok2str(dccp_pkt_type_str, "", dccph_type),
 400                                   len - fixed_hdrlen));
 401                         return;
 402                 }
 403                 ND_TCHECK(*dhr);
 404                 ND_PRINT((ndo, "%s (service=%d) ",
 405                           tok2str(dccp_pkt_type_str, "", dccph_type),
 406                           EXTRACT_32BITS(&dhr->dccph_resp_service)));
 407                 break;
 408         }
 409         case DCCP_PKT_DATA:
 410                 ND_PRINT((ndo, "%s ", tok2str(dccp_pkt_type_str, "", dccph_type)));
 411                 break;
 412         case DCCP_PKT_ACK: {
 413                 fixed_hdrlen += 8;
 414                 if (len < fixed_hdrlen) {
 415                         ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
 416                                   tok2str(dccp_pkt_type_str, "", dccph_type),
 417                                   len - fixed_hdrlen));
 418                         return;
 419                 }
 420                 ND_PRINT((ndo, "%s ", tok2str(dccp_pkt_type_str, "", dccph_type)));
 421                 break;
 422         }
 423         case DCCP_PKT_DATAACK: {
 424                 fixed_hdrlen += 8;
 425                 if (len < fixed_hdrlen) {
 426                         ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
 427                                   tok2str(dccp_pkt_type_str, "", dccph_type),
 428                                   len - fixed_hdrlen));
 429                         return;
 430                 }
 431                 ND_PRINT((ndo, "%s ", tok2str(dccp_pkt_type_str, "", dccph_type)));
 432                 break;
 433         }
 434         case DCCP_PKT_CLOSEREQ:
 435                 fixed_hdrlen += 8;
 436                 if (len < fixed_hdrlen) {
 437                         ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
 438                                   tok2str(dccp_pkt_type_str, "", dccph_type),
 439                                   len - fixed_hdrlen));
 440                         return;
 441                 }
 442                 ND_PRINT((ndo, "%s ", tok2str(dccp_pkt_type_str, "", dccph_type)));
 443                 break;
 444         case DCCP_PKT_CLOSE:
 445                 fixed_hdrlen += 8;
 446                 if (len < fixed_hdrlen) {
 447                         ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
 448                                   tok2str(dccp_pkt_type_str, "", dccph_type),
 449                                   len - fixed_hdrlen));
 450                         return;
 451                 }
 452                 ND_PRINT((ndo, "%s ", tok2str(dccp_pkt_type_str, "", dccph_type)));
 453                 break;
 454         case DCCP_PKT_RESET: {
 455                 struct dccp_hdr_reset *dhr =
 456                         (struct dccp_hdr_reset *)(bp + fixed_hdrlen);
 457                 fixed_hdrlen += 12;
 458                 if (len < fixed_hdrlen) {
 459                         ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
 460                                   tok2str(dccp_pkt_type_str, "", dccph_type),
 461                                   len - fixed_hdrlen));
 462                         return;
 463                 }
 464                 ND_TCHECK(*dhr);
 465                 ND_PRINT((ndo, "%s (code=%s) ",
 466                           tok2str(dccp_pkt_type_str, "", dccph_type),
 467                           dccp_reset_code(dhr->dccph_reset_code)));
 468                 break;
 469         }
 470         case DCCP_PKT_SYNC:
 471                 fixed_hdrlen += 8;
 472                 if (len < fixed_hdrlen) {
 473                         ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
 474                                   tok2str(dccp_pkt_type_str, "", dccph_type),
 475                                   len - fixed_hdrlen));
 476                         return;
 477                 }
 478                 ND_PRINT((ndo, "%s ", tok2str(dccp_pkt_type_str, "", dccph_type)));
 479                 break;
 480         case DCCP_PKT_SYNCACK:
 481                 fixed_hdrlen += 8;
 482                 if (len < fixed_hdrlen) {
 483                         ND_PRINT((ndo, "truncated-%s - %u bytes missing!",
 484                                   tok2str(dccp_pkt_type_str, "", dccph_type),
 485                                   len - fixed_hdrlen));
 486                         return;
 487                 }
 488                 ND_PRINT((ndo, "%s ", tok2str(dccp_pkt_type_str, "", dccph_type)));
 489                 break;
 490         default:
 491                 ND_PRINT((ndo, "%s ", tok2str(dccp_pkt_type_str, "unknown-type-%u", dccph_type)));
 492                 break;
 493         }
 494
 495         if ((DCCPH_TYPE(dh) != DCCP_PKT_DATA) &&
 496                         (DCCPH_TYPE(dh) != DCCP_PKT_REQUEST))
 497                 dccp_print_ack_no(ndo, bp);
 498
 499         if (ndo->ndo_vflag < 2)
 500                 return;
 501
 502         ND_PRINT((ndo, "seq %" PRIu64, dccp_seqno(bp)));
 503
 504         /* process options */
 505         if (hlen > fixed_hdrlen){
 506                 const u_char *cp;
 507                 u_int optlen;
 508                 cp = bp + fixed_hdrlen;
 509                 ND_PRINT((ndo, " <"));
 510
 511                 hlen -= fixed_hdrlen;
 512                 while(1){
 513                         optlen = dccp_print_option(ndo, cp, hlen);
 514                         if (!optlen)
 515                                 break;
 516                         if (hlen <= optlen)
 517                                 break;
 518                         hlen -= optlen;
 519                         cp += optlen;
 520                         ND_PRINT((ndo, ", "));
 521                 }
 522                 ND_PRINT((ndo, ">"));
 523         }
 524         return;
 525 trunc:
 526         ND_PRINT((ndo, "%s", tstr));
 527         return;
 528 }
 529
 530 static const struct tok dccp_option_values[] = {
 531         { 0, "nop" },
 532         { 1, "mandatory" },
 533         { 2, "slowreceiver" },
 534         { 32, "change_l" },
 535         { 33, "confirm_l" },
 536         { 34, "change_r" },
 537         { 35, "confirm_r" },
 538         { 36, "initcookie" },
 539         { 37, "ndp_count" },
 540         { 38, "ack_vector0" },
 541         { 39, "ack_vector1" },
 542         { 40, "data_dropped" },
 543         { 41, "timestamp" },
 544         { 42, "timestamp_echo" },
 545         { 43, "elapsed_time" },
 546         { 44, "data_checksum" },
 547         { 0, NULL }
 548 };
 549
 550 static int dccp_print_option(netdissect_options *ndo, const u_char *option, u_int hlen)
 551 {
 552         uint8_t optlen, i;
 553
 554         ND_TCHECK(*option);
 555
 556         if (*option >= 32) {
 557                 ND_TCHECK(*(option+1));
 558                 optlen = *(option +1);
 559                 if (optlen < 2) {
 560                         if (*option >= 128)
 561                                 ND_PRINT((ndo, "CCID option %u optlen too short", *option));
 562                         else
 563                                 ND_PRINT((ndo, "%s optlen too short",
 564                                           tok2str(dccp_option_values, "Option %u", *option)));
 565                         return 0;
 566                 }
 567         } else
 568                 optlen = 1;
 569
 570         if (hlen < optlen) {
 571                 if (*option >= 128)
 572                         ND_PRINT((ndo, "CCID option %u optlen goes past header length",
 573                                   *option));
 574                 else
 575                         ND_PRINT((ndo, "%s optlen goes past header length",
 576                                   tok2str(dccp_option_values, "Option %u", *option)));
 577                 return 0;
 578         }
 579         ND_TCHECK2(*option, optlen);
 580
 581         if (*option >= 128) {
 582                 ND_PRINT((ndo, "CCID option %d", *option));
 583                 switch (optlen) {
 584                         case 4:
 585                                 ND_PRINT((ndo, " %u", EXTRACT_16BITS(option + 2)));
 586                                 break;
 587                         case 6:
 588                                 ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
 589                                 break;
 590                         default:
 591                                 break;
 592                 }
 593         } else {
 594                 ND_PRINT((ndo, "%s", tok2str(dccp_option_values, "Option %u", *option)));
 595                 switch (*option) {
 596                 case 32:
 597                 case 33:
 598                 case 34:
 599                 case 35:
 600                         if (optlen < 3) {
 601                                 ND_PRINT((ndo, " optlen too short"));
 602                                 return optlen;
 603                         }
 604                         if (*(option + 2) < 10){
 605                                 ND_PRINT((ndo, " %s", dccp_feature_nums[*(option + 2)]));
 606                                 for (i = 0; i < optlen - 3; i++)
 607                                         ND_PRINT((ndo, " %d", *(option + 3 + i)));
 608                         }
 609                         break;
 610                 case 36:
 611                         if (optlen > 2) {
 612                                 ND_PRINT((ndo, " 0x"));
 613                                 for (i = 0; i < optlen - 2; i++)
 614                                         ND_PRINT((ndo, "%02x", *(option + 2 + i)));
 615                         }
 616                         break;
 617                 case 37:
 618                         for (i = 0; i < optlen - 2; i++)
 619                                 ND_PRINT((ndo, " %d", *(option + 2 + i)));
 620                         break;
 621                 case 38:
 622                         if (optlen > 2) {
 623                                 ND_PRINT((ndo, " 0x"));
 624                                 for (i = 0; i < optlen - 2; i++)
 625                                         ND_PRINT((ndo, "%02x", *(option + 2 + i)));
 626                         }
 627                         break;
 628                 case 39:
 629                         if (optlen > 2) {
 630                                 ND_PRINT((ndo, " 0x"));
 631                                 for (i = 0; i < optlen - 2; i++)
 632                                         ND_PRINT((ndo, "%02x", *(option + 2 + i)));
 633                         }
 634                         break;
 635                 case 40:
 636                         if (optlen > 2) {
 637                                 ND_PRINT((ndo, " 0x"));
 638                                 for (i = 0; i < optlen - 2; i++)
 639                                         ND_PRINT((ndo, "%02x", *(option + 2 + i)));
 640                         }
 641                         break;
 642                 case 41:
 643                         if (optlen == 4)
 644                                 ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
 645                         else
 646                                 ND_PRINT((ndo, " optlen != 4"));
 647                         break;
 648                 case 42:
 649                         if (optlen == 4)
 650                                 ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
 651                         else
 652                                 ND_PRINT((ndo, " optlen != 4"));
 653                         break;
 654                 case 43:
 655                         if (optlen == 6)
 656                                 ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
 657                         else if (optlen == 4)
 658                                 ND_PRINT((ndo, " %u", EXTRACT_16BITS(option + 2)));
 659                         else
 660                                 ND_PRINT((ndo, " optlen != 4 or 6"));
 661                         break;
 662                 case 44:
 663                         if (optlen > 2) {
 664                                 ND_PRINT((ndo, " "));
 665                                 for (i = 0; i < optlen - 2; i++)
 666                                         ND_PRINT((ndo, "%02x", *(option + 2 + i)));
 667                         }
 668                         break;
 669                 }
 670         }
 671
 672         return optlen;
 673 trunc:
 674         ND_PRINT((ndo, "%s", tstr));
 675         return 0;
 676 }