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

   1 /*
   2  * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
   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  * Support for splitting captures into multiple files with a maximum
  22  * file size:
  23  *
  24  * Copyright (c) 2001
  25  *      Seth Webster <swebster@sst.ll.mit.edu>
  26  */
  27
  28 #ifdef HAVE_CONFIG_H
  29 #include "config.h"
  30 #endif
  31
  32 #include <stdlib.h>
  33 #include <string.h>
  34
  35 #include <netdissect-stdinc.h>
  36
  37 #include "netdissect.h"
  38 #include "addrtoname.h"
  39 #include "print.h"
  40
  41 struct printer {
  42         if_printer f;
  43         int type;
  44 };
  45
  46 static const struct printer printers[] = {
  47         { ether_if_print,       DLT_EN10MB },
  48 #ifdef DLT_IPNET
  49         { ipnet_if_print,       DLT_IPNET },
  50 #endif
  51 #ifdef DLT_IEEE802_15_4
  52         { ieee802_15_4_if_print, DLT_IEEE802_15_4 },
  53 #endif
  54 #ifdef DLT_IEEE802_15_4_NOFCS
  55         { ieee802_15_4_if_print, DLT_IEEE802_15_4_NOFCS },
  56 #endif
  57 #ifdef DLT_PPI
  58         { ppi_if_print,         DLT_PPI },
  59 #endif
  60 #ifdef DLT_NETANALYZER
  61         { netanalyzer_if_print, DLT_NETANALYZER },
  62 #endif
  63 #ifdef DLT_NETANALYZER_TRANSPARENT
  64         { netanalyzer_transparent_if_print, DLT_NETANALYZER_TRANSPARENT },
  65 #endif
  66 #if defined(DLT_NFLOG) && defined(HAVE_PCAP_NFLOG_H)
  67         { nflog_if_print,       DLT_NFLOG},
  68 #endif
  69 #ifdef DLT_CIP
  70         { cip_if_print,         DLT_CIP },
  71 #endif
  72 #ifdef DLT_ATM_CLIP
  73         { cip_if_print,         DLT_ATM_CLIP },
  74 #endif
  75 #ifdef DLT_IP_OVER_FC
  76         { ipfc_if_print,        DLT_IP_OVER_FC },
  77 #endif
  78         { null_if_print,        DLT_NULL },
  79 #ifdef DLT_LOOP
  80         { null_if_print,        DLT_LOOP },
  81 #endif
  82 #ifdef DLT_APPLE_IP_OVER_IEEE1394
  83         { ap1394_if_print,      DLT_APPLE_IP_OVER_IEEE1394 },
  84 #endif
  85 #if defined(DLT_BLUETOOTH_HCI_H4_WITH_PHDR) && defined(HAVE_PCAP_BLUETOOTH_H)
  86         { bt_if_print,          DLT_BLUETOOTH_HCI_H4_WITH_PHDR},
  87 #endif
  88 #ifdef DLT_LANE8023
  89         { lane_if_print,        DLT_LANE8023 },
  90 #endif
  91         { arcnet_if_print,      DLT_ARCNET },
  92 #ifdef DLT_ARCNET_LINUX
  93         { arcnet_linux_if_print, DLT_ARCNET_LINUX },
  94 #endif
  95         { raw_if_print,         DLT_RAW },
  96 #ifdef DLT_IPV4
  97         { raw_if_print,         DLT_IPV4 },
  98 #endif
  99 #ifdef DLT_IPV6
 100         { raw_if_print,         DLT_IPV6 },
 101 #endif
 102 #ifdef HAVE_PCAP_USB_H
 103 #ifdef DLT_USB_LINUX
 104         { usb_linux_48_byte_print, DLT_USB_LINUX},
 105 #endif /* DLT_USB_LINUX */
 106 #ifdef DLT_USB_LINUX_MMAPPED
 107         { usb_linux_64_byte_print, DLT_USB_LINUX_MMAPPED},
 108 #endif /* DLT_USB_LINUX_MMAPPED */
 109 #endif /* HAVE_PCAP_USB_H */
 110 #ifdef DLT_SYMANTEC_FIREWALL
 111         { symantec_if_print,    DLT_SYMANTEC_FIREWALL },
 112 #endif
 113 #ifdef DLT_C_HDLC
 114         { chdlc_if_print,       DLT_C_HDLC },
 115 #endif
 116 #ifdef DLT_HDLC
 117         { chdlc_if_print,       DLT_HDLC },
 118 #endif
 119 #ifdef DLT_PPP_ETHER
 120         { pppoe_if_print,       DLT_PPP_ETHER },
 121 #endif
 122 #if defined(DLT_PFLOG) && defined(HAVE_NET_IF_PFLOG_H)
 123         { pflog_if_print,       DLT_PFLOG },
 124 #endif
 125         { token_if_print,       DLT_IEEE802 },
 126         { fddi_if_print,        DLT_FDDI },
 127 #ifdef DLT_LINUX_SLL
 128         { sll_if_print,         DLT_LINUX_SLL },
 129 #endif
 130 #ifdef DLT_FR
 131         { fr_if_print,          DLT_FR },
 132 #endif
 133 #ifdef DLT_FRELAY
 134         { fr_if_print,          DLT_FRELAY },
 135 #endif
 136 #ifdef DLT_MFR
 137         { mfr_if_print,         DLT_MFR },
 138 #endif
 139         { atm_if_print,         DLT_ATM_RFC1483 },
 140 #ifdef DLT_SUNATM
 141         { sunatm_if_print,      DLT_SUNATM },
 142 #endif
 143 #ifdef DLT_ENC
 144         { enc_if_print,         DLT_ENC },
 145 #endif
 146         { sl_if_print,          DLT_SLIP },
 147 #ifdef DLT_SLIP_BSDOS
 148         { sl_bsdos_if_print,    DLT_SLIP_BSDOS },
 149 #endif
 150 #ifdef DLT_LTALK
 151         { ltalk_if_print,       DLT_LTALK },
 152 #endif
 153 #ifdef DLT_JUNIPER_ATM1
 154         { juniper_atm1_print,   DLT_JUNIPER_ATM1 },
 155 #endif
 156 #ifdef DLT_JUNIPER_ATM2
 157         { juniper_atm2_print,   DLT_JUNIPER_ATM2 },
 158 #endif
 159 #ifdef DLT_JUNIPER_MFR
 160         { juniper_mfr_print,    DLT_JUNIPER_MFR },
 161 #endif
 162 #ifdef DLT_JUNIPER_MLFR
 163         { juniper_mlfr_print,   DLT_JUNIPER_MLFR },
 164 #endif
 165 #ifdef DLT_JUNIPER_MLPPP
 166         { juniper_mlppp_print,  DLT_JUNIPER_MLPPP },
 167 #endif
 168 #ifdef DLT_JUNIPER_PPPOE
 169         { juniper_pppoe_print,  DLT_JUNIPER_PPPOE },
 170 #endif
 171 #ifdef DLT_JUNIPER_PPPOE_ATM
 172         { juniper_pppoe_atm_print, DLT_JUNIPER_PPPOE_ATM },
 173 #endif
 174 #ifdef DLT_JUNIPER_GGSN
 175         { juniper_ggsn_print,   DLT_JUNIPER_GGSN },
 176 #endif
 177 #ifdef DLT_JUNIPER_ES
 178         { juniper_es_print,     DLT_JUNIPER_ES },
 179 #endif
 180 #ifdef DLT_JUNIPER_MONITOR
 181         { juniper_monitor_print, DLT_JUNIPER_MONITOR },
 182 #endif
 183 #ifdef DLT_JUNIPER_SERVICES
 184         { juniper_services_print, DLT_JUNIPER_SERVICES },
 185 #endif
 186 #ifdef DLT_JUNIPER_ETHER
 187         { juniper_ether_print,  DLT_JUNIPER_ETHER },
 188 #endif
 189 #ifdef DLT_JUNIPER_PPP
 190         { juniper_ppp_print,    DLT_JUNIPER_PPP },
 191 #endif
 192 #ifdef DLT_JUNIPER_FRELAY
 193         { juniper_frelay_print, DLT_JUNIPER_FRELAY },
 194 #endif
 195 #ifdef DLT_JUNIPER_CHDLC
 196         { juniper_chdlc_print,  DLT_JUNIPER_CHDLC },
 197 #endif
 198 #ifdef DLT_PKTAP
 199         { pktap_if_print,       DLT_PKTAP },
 200 #endif
 201 #ifdef DLT_IEEE802_11_RADIO
 202         { ieee802_11_radio_if_print,    DLT_IEEE802_11_RADIO },
 203 #endif
 204 #ifdef DLT_IEEE802_11
 205         { ieee802_11_if_print,  DLT_IEEE802_11},
 206 #endif
 207 #ifdef DLT_IEEE802_11_RADIO_AVS
 208         { ieee802_11_radio_avs_if_print,        DLT_IEEE802_11_RADIO_AVS },
 209 #endif
 210 #ifdef DLT_PRISM_HEADER
 211         { prism_if_print,       DLT_PRISM_HEADER },
 212 #endif
 213         { ppp_if_print,         DLT_PPP },
 214 #ifdef DLT_PPP_WITHDIRECTION
 215         { ppp_if_print,         DLT_PPP_WITHDIRECTION },
 216 #endif
 217 #ifdef DLT_PPP_BSDOS
 218         { ppp_bsdos_if_print,   DLT_PPP_BSDOS },
 219 #endif
 220 #ifdef DLT_PPP_SERIAL
 221         { ppp_hdlc_if_print,    DLT_PPP_SERIAL },
 222 #endif
 223         { NULL,                 0 },
 224 };
 225
 226 static void     ndo_default_print(netdissect_options *ndo, const u_char *bp,
 227                     u_int length);
 228
 229 static void     ndo_error(netdissect_options *ndo _U_, const char *fmt, ...)
 230                     __attribute__((noreturn))
 231 #ifdef __ATTRIBUTE___FORMAT_OK
 232                     __attribute__((format (printf, 2, 3)))
 233 #endif /* __ATTRIBUTE___FORMAT_OK */
 234                     ;
 235 static void     ndo_warning(netdissect_options *ndo _U_, const char *fmt, ...)
 236 #ifdef __ATTRIBUTE___FORMAT_OK
 237                     __attribute__((format (printf, 2, 3)))
 238 #endif /* __ATTRIBUTE___FORMAT_OK */
 239                     ;
 240
 241 static int      ndo_printf(netdissect_options *ndo _U_, const char *fmt, ...)
 242 #ifdef __ATTRIBUTE___FORMAT_OK
 243                      __attribute ((format (printf, 2, 3)))
 244 #endif /* __ATTRIBUTE___FORMAT_OK */
 245                      ;
 246
 247 void
 248 init_print(netdissect_options *ndo, uint32_t localnet, uint32_t mask,
 249     uint32_t timezone_offset)
 250 {
 251
 252         thiszone = timezone_offset;
 253         init_addrtoname(ndo, localnet, mask);
 254         init_checksum();
 255 }
 256
 257 if_printer
 258 lookup_printer(int type)
 259 {
 260         const struct printer *p;
 261
 262         for (p = printers; p->f; ++p)
 263                 if (type == p->type)
 264                         return p->f;
 265
 266 #if defined(DLT_USER2) && defined(DLT_PKTAP)
 267         /*
 268          * Apple incorrectly chose to use DLT_USER2 for their PKTAP
 269          * header.
 270          *
 271          * We map DLT_PKTAP, whether it's DLT_USER2 as it is on Darwin-
 272          * based OSes or the same value as LINKTYPE_PKTAP as it is on
 273          * other OSes, to LINKTYPE_PKTAP, so files written with
 274          * this version of libpcap for a DLT_PKTAP capture have a link-
 275          * layer header type of LINKTYPE_PKTAP.
 276          *
 277          * However, files written on OS X Mavericks for a DLT_PKTAP
 278          * capture have a link-layer header type of LINKTYPE_USER2.
 279          * If we don't have a printer for DLT_USER2, and type is
 280          * DLT_USER2, we look up the printer for DLT_PKTAP and use
 281          * that.
 282          */
 283         if (type == DLT_USER2) {
 284                 for (p = printers; p->f; ++p)
 285                         if (DLT_PKTAP == p->type)
 286                                 return p->f;
 287         }
 288 #endif
 289
 290         return NULL;
 291         /* NOTREACHED */
 292 }
 293
 294 int
 295 has_printer(int type)
 296 {
 297         return (lookup_printer(type) != NULL);
 298 }
 299
 300 if_printer
 301 get_if_printer(netdissect_options *ndo, int type)
 302 {
 303         const char *dltname;
 304         if_printer printer;
 305
 306         printer = lookup_printer(type);
 307         if (printer == NULL) {
 308                 dltname = pcap_datalink_val_to_name(type);
 309                 if (dltname != NULL)
 310                         (*ndo->ndo_error)(ndo,
 311                                           "packet printing is not supported for link type %s: use -w",
 312                                           dltname);
 313                 else
 314                         (*ndo->ndo_error)(ndo,
 315                                           "packet printing is not supported for link type %d: use -w", type);
 316         }
 317         return printer;
 318 }
 319
 320 void
 321 pretty_print_packet(netdissect_options *ndo, const struct pcap_pkthdr *h,
 322     const u_char *sp, u_int packets_captured)
 323 {
 324         u_int hdrlen;
 325
 326         if(ndo->ndo_packet_number)
 327                 ND_PRINT((ndo, "%5u  ", packets_captured));
 328
 329         ts_print(ndo, &h->ts);
 330
 331         /*
 332          * Some printers want to check that they're not walking off the
 333          * end of the packet.
 334          * Rather than pass it all the way down, we set this member
 335          * of the netdissect_options structure.
 336          */
 337         ndo->ndo_snapend = sp + h->caplen;
 338
 339         hdrlen = (ndo->ndo_if_printer)(ndo, h, sp);
 340
 341         /*
 342          * Restore the original snapend, as a printer might have
 343          * changed it.
 344          */
 345         ndo->ndo_snapend = sp + h->caplen;
 346         if (ndo->ndo_Xflag) {
 347                 /*
 348                  * Print the raw packet data in hex and ASCII.
 349                  */
 350                 if (ndo->ndo_Xflag > 1) {
 351                         /*
 352                          * Include the link-layer header.
 353                          */
 354                         hex_and_ascii_print(ndo, "\n\t", sp, h->caplen);
 355                 } else {
 356                         /*
 357                          * Don't include the link-layer header - and if
 358                          * we have nothing past the link-layer header,
 359                          * print nothing.
 360                          */
 361                         if (h->caplen > hdrlen)
 362                                 hex_and_ascii_print(ndo, "\n\t", sp + hdrlen,
 363                                     h->caplen - hdrlen);
 364                 }
 365         } else if (ndo->ndo_xflag) {
 366                 /*
 367                  * Print the raw packet data in hex.
 368                  */
 369                 if (ndo->ndo_xflag > 1) {
 370                         /*
 371                          * Include the link-layer header.
 372                          */
 373                         hex_print(ndo, "\n\t", sp, h->caplen);
 374                 } else {
 375                         /*
 376                          * Don't include the link-layer header - and if
 377                          * we have nothing past the link-layer header,
 378                          * print nothing.
 379                          */
 380                         if (h->caplen > hdrlen)
 381                                 hex_print(ndo, "\n\t", sp + hdrlen,
 382                                           h->caplen - hdrlen);
 383                 }
 384         } else if (ndo->ndo_Aflag) {
 385                 /*
 386                  * Print the raw packet data in ASCII.
 387                  */
 388                 if (ndo->ndo_Aflag > 1) {
 389                         /*
 390                          * Include the link-layer header.
 391                          */
 392                         ascii_print(ndo, sp, h->caplen);
 393                 } else {
 394                         /*
 395                          * Don't include the link-layer header - and if
 396                          * we have nothing past the link-layer header,
 397                          * print nothing.
 398                          */
 399                         if (h->caplen > hdrlen)
 400                                 ascii_print(ndo, sp + hdrlen, h->caplen - hdrlen);
 401                 }
 402         }
 403
 404         putchar('\n');
 405 }
 406
 407 /*
 408  * By default, print the specified data out in hex and ASCII.
 409  */
 410 static void
 411 ndo_default_print(netdissect_options *ndo, const u_char *bp, u_int length)
 412 {
 413         hex_and_ascii_print(ndo, "\n\t", bp, length); /* pass on lf and indentation string */
 414 }
 415
 416 /* VARARGS */
 417 static void
 418 ndo_error(netdissect_options *ndo, const char *fmt, ...)
 419 {
 420         va_list ap;
 421
 422         if(ndo->program_name)
 423                 (void)fprintf(stderr, "%s: ", ndo->program_name);
 424         va_start(ap, fmt);
 425         (void)vfprintf(stderr, fmt, ap);
 426         va_end(ap);
 427         if (*fmt) {
 428                 fmt += strlen(fmt);
 429                 if (fmt[-1] != '\n')
 430                         (void)fputc('\n', stderr);
 431         }
 432         exit(1);
 433         /* NOTREACHED */
 434 }
 435
 436 /* VARARGS */
 437 static void
 438 ndo_warning(netdissect_options *ndo, const char *fmt, ...)
 439 {
 440         va_list ap;
 441
 442         if(ndo->program_name)
 443                 (void)fprintf(stderr, "%s: ", ndo->program_name);
 444         (void)fprintf(stderr, "WARNING: ");
 445         va_start(ap, fmt);
 446         (void)vfprintf(stderr, fmt, ap);
 447         va_end(ap);
 448         if (*fmt) {
 449                 fmt += strlen(fmt);
 450                 if (fmt[-1] != '\n')
 451                         (void)fputc('\n', stderr);
 452         }
 453 }
 454
 455 static int
 456 ndo_printf(netdissect_options *ndo _U_, const char *fmt, ...)
 457 {
 458         va_list args;
 459         int ret;
 460
 461         va_start(args, fmt);
 462         ret = vfprintf(stdout, fmt, args);
 463         va_end(args);
 464
 465         if (ret < 0)
 466                 ndo_error(ndo, "Unable to write output: %s", pcap_strerror(errno));
 467         return (ret);
 468 }
 469
 470 void
 471 ndo_set_function_pointers(netdissect_options *ndo)
 472 {
 473         ndo->ndo_default_print=ndo_default_print;
 474         ndo->ndo_printf=ndo_printf;
 475         ndo->ndo_error=ndo_error;
 476         ndo->ndo_warning=ndo_warning;
 477 }
 478 /*
 479  * Local Variables:
 480  * c-style: whitesmith
 481  * c-basic-offset: 8
 482  * End:
 483  */