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 #if defined(DLT_PFSYNC) && defined(HAVE_NET_PFVAR_H) 126 { pfsync_if_print, DLT_PFSYNC}, 127 #endif 128 { token_if_print, DLT_IEEE802 }, 129 { fddi_if_print, DLT_FDDI }, 130 #ifdef DLT_LINUX_SLL 131 { sll_if_print, DLT_LINUX_SLL }, 132 #endif 133 #ifdef DLT_FR 134 { fr_if_print, DLT_FR }, 135 #endif 136 #ifdef DLT_FRELAY 137 { fr_if_print, DLT_FRELAY }, 138 #endif 139 #ifdef DLT_MFR 140 { mfr_if_print, DLT_MFR }, 141 #endif 142 { atm_if_print, DLT_ATM_RFC1483 }, 143 #ifdef DLT_SUNATM 144 { sunatm_if_print, DLT_SUNATM }, 145 #endif 146 #ifdef DLT_ENC 147 { enc_if_print, DLT_ENC }, 148 #endif 149 { sl_if_print, DLT_SLIP }, 150 #ifdef DLT_SLIP_BSDOS 151 { sl_bsdos_if_print, DLT_SLIP_BSDOS }, 152 #endif 153 #ifdef DLT_LTALK 154 { ltalk_if_print, DLT_LTALK }, 155 #endif 156 #ifdef DLT_JUNIPER_ATM1 157 { juniper_atm1_print, DLT_JUNIPER_ATM1 }, 158 #endif 159 #ifdef DLT_JUNIPER_ATM2 160 { juniper_atm2_print, DLT_JUNIPER_ATM2 }, 161 #endif 162 #ifdef DLT_JUNIPER_MFR 163 { juniper_mfr_print, DLT_JUNIPER_MFR }, 164 #endif 165 #ifdef DLT_JUNIPER_MLFR 166 { juniper_mlfr_print, DLT_JUNIPER_MLFR }, 167 #endif 168 #ifdef DLT_JUNIPER_MLPPP 169 { juniper_mlppp_print, DLT_JUNIPER_MLPPP }, 170 #endif 171 #ifdef DLT_JUNIPER_PPPOE 172 { juniper_pppoe_print, DLT_JUNIPER_PPPOE }, 173 #endif 174 #ifdef DLT_JUNIPER_PPPOE_ATM 175 { juniper_pppoe_atm_print, DLT_JUNIPER_PPPOE_ATM }, 176 #endif 177 #ifdef DLT_JUNIPER_GGSN 178 { juniper_ggsn_print, DLT_JUNIPER_GGSN }, 179 #endif 180 #ifdef DLT_JUNIPER_ES 181 { juniper_es_print, DLT_JUNIPER_ES }, 182 #endif 183 #ifdef DLT_JUNIPER_MONITOR 184 { juniper_monitor_print, DLT_JUNIPER_MONITOR }, 185 #endif 186 #ifdef DLT_JUNIPER_SERVICES 187 { juniper_services_print, DLT_JUNIPER_SERVICES }, 188 #endif 189 #ifdef DLT_JUNIPER_ETHER 190 { juniper_ether_print, DLT_JUNIPER_ETHER }, 191 #endif 192 #ifdef DLT_JUNIPER_PPP 193 { juniper_ppp_print, DLT_JUNIPER_PPP }, 194 #endif 195 #ifdef DLT_JUNIPER_FRELAY 196 { juniper_frelay_print, DLT_JUNIPER_FRELAY }, 197 #endif 198 #ifdef DLT_JUNIPER_CHDLC 199 { juniper_chdlc_print, DLT_JUNIPER_CHDLC }, 200 #endif 201 #ifdef DLT_PKTAP 202 { pktap_if_print, DLT_PKTAP }, 203 #endif 204 #ifdef DLT_IEEE802_11_RADIO 205 { ieee802_11_radio_if_print, DLT_IEEE802_11_RADIO }, 206 #endif 207 #ifdef DLT_IEEE802_11 208 { ieee802_11_if_print, DLT_IEEE802_11}, 209 #endif 210 #ifdef DLT_IEEE802_11_RADIO_AVS 211 { ieee802_11_radio_avs_if_print, DLT_IEEE802_11_RADIO_AVS }, 212 #endif 213 #ifdef DLT_PRISM_HEADER 214 { prism_if_print, DLT_PRISM_HEADER }, 215 #endif 216 { ppp_if_print, DLT_PPP }, 217 #ifdef DLT_PPP_WITHDIRECTION 218 { ppp_if_print, DLT_PPP_WITHDIRECTION }, 219 #endif 220 #ifdef DLT_PPP_BSDOS 221 { ppp_bsdos_if_print, DLT_PPP_BSDOS }, 222 #endif 223 #ifdef DLT_PPP_SERIAL 224 { ppp_hdlc_if_print, DLT_PPP_SERIAL }, 225 #endif 226 { NULL, 0 }, 227 }; 228 229 static void ndo_default_print(netdissect_options *ndo, const u_char *bp, 230 u_int length); 231 232 static void ndo_error(netdissect_options *ndo, 233 FORMAT_STRING(const char *fmt), ...) 234 NORETURN PRINTFLIKE(2, 3); 235 static void ndo_warning(netdissect_options *ndo, 236 FORMAT_STRING(const char *fmt), ...) 237 PRINTFLIKE(2, 3); 238 239 static int ndo_printf(netdissect_options *ndo, 240 FORMAT_STRING(const char *fmt), ...) 241 PRINTFLIKE(2, 3); 242 243 void 244 init_print(netdissect_options *ndo, uint32_t localnet, uint32_t mask, 245 uint32_t timezone_offset) 246 { 247 248 thiszone = timezone_offset; 249 init_addrtoname(ndo, localnet, mask); 250 init_checksum(); 251 } 252 253 if_printer 254 lookup_printer(int type) 255 { 256 const struct printer *p; 257 258 for (p = printers; p->f; ++p) 259 if (type == p->type) 260 return p->f; 261 262 #if defined(DLT_USER2) && defined(DLT_PKTAP) 263 /* 264 * Apple incorrectly chose to use DLT_USER2 for their PKTAP 265 * header. 266 * 267 * We map DLT_PKTAP, whether it's DLT_USER2 as it is on Darwin- 268 * based OSes or the same value as LINKTYPE_PKTAP as it is on 269 * other OSes, to LINKTYPE_PKTAP, so files written with 270 * this version of libpcap for a DLT_PKTAP capture have a link- 271 * layer header type of LINKTYPE_PKTAP. 272 * 273 * However, files written on OS X Mavericks for a DLT_PKTAP 274 * capture have a link-layer header type of LINKTYPE_USER2. 275 * If we don't have a printer for DLT_USER2, and type is 276 * DLT_USER2, we look up the printer for DLT_PKTAP and use 277 * that. 278 */ 279 if (type == DLT_USER2) { 280 for (p = printers; p->f; ++p) 281 if (DLT_PKTAP == p->type) 282 return p->f; 283 } 284 #endif 285 286 return NULL; 287 /* NOTREACHED */ 288 } 289 290 int 291 has_printer(int type) 292 { 293 return (lookup_printer(type) != NULL); 294 } 295 296 if_printer 297 get_if_printer(netdissect_options *ndo, int type) 298 { 299 const char *dltname; 300 if_printer printer; 301 302 printer = lookup_printer(type); 303 if (printer == NULL) { 304 dltname = pcap_datalink_val_to_name(type); 305 if (dltname != NULL) 306 (*ndo->ndo_error)(ndo, 307 "packet printing is not supported for link type %s: use -w", 308 dltname); 309 else 310 (*ndo->ndo_error)(ndo, 311 "packet printing is not supported for link type %d: use -w", type); 312 } 313 return printer; 314 } 315 316 void 317 pretty_print_packet(netdissect_options *ndo, const struct pcap_pkthdr *h, 318 const u_char *sp, u_int packets_captured) 319 { 320 u_int hdrlen; 321 322 if(ndo->ndo_packet_number) 323 ND_PRINT((ndo, "%5u ", packets_captured)); 324 325 ts_print(ndo, &h->ts); 326 327 /* 328 * Some printers want to check that they're not walking off the 329 * end of the packet. 330 * Rather than pass it all the way down, we set this member 331 * of the netdissect_options structure. 332 */ 333 ndo->ndo_snapend = sp + h->caplen; 334 335 hdrlen = (ndo->ndo_if_printer)(ndo, h, sp); 336 337 /* 338 * Restore the original snapend, as a printer might have 339 * changed it. 340 */ 341 ndo->ndo_snapend = sp + h->caplen; 342 if (ndo->ndo_Xflag) { 343 /* 344 * Print the raw packet data in hex and ASCII. 345 */ 346 if (ndo->ndo_Xflag > 1) { 347 /* 348 * Include the link-layer header. 349 */ 350 hex_and_ascii_print(ndo, "\n\t", sp, h->caplen); 351 } else { 352 /* 353 * Don't include the link-layer header - and if 354 * we have nothing past the link-layer header, 355 * print nothing. 356 */ 357 if (h->caplen > hdrlen) 358 hex_and_ascii_print(ndo, "\n\t", sp + hdrlen, 359 h->caplen - hdrlen); 360 } 361 } else if (ndo->ndo_xflag) { 362 /* 363 * Print the raw packet data in hex. 364 */ 365 if (ndo->ndo_xflag > 1) { 366 /* 367 * Include the link-layer header. 368 */ 369 hex_print(ndo, "\n\t", sp, h->caplen); 370 } else { 371 /* 372 * Don't include the link-layer header - and if 373 * we have nothing past the link-layer header, 374 * print nothing. 375 */ 376 if (h->caplen > hdrlen) 377 hex_print(ndo, "\n\t", sp + hdrlen, 378 h->caplen - hdrlen); 379 } 380 } else if (ndo->ndo_Aflag) { 381 /* 382 * Print the raw packet data in ASCII. 383 */ 384 if (ndo->ndo_Aflag > 1) { 385 /* 386 * Include the link-layer header. 387 */ 388 ascii_print(ndo, sp, h->caplen); 389 } else { 390 /* 391 * Don't include the link-layer header - and if 392 * we have nothing past the link-layer header, 393 * print nothing. 394 */ 395 if (h->caplen > hdrlen) 396 ascii_print(ndo, sp + hdrlen, h->caplen - hdrlen); 397 } 398 } 399 400 ND_PRINT((ndo, "\n")); 401 } 402 403 /* 404 * By default, print the specified data out in hex and ASCII. 405 */ 406 static void 407 ndo_default_print(netdissect_options *ndo, const u_char *bp, u_int length) 408 { 409 hex_and_ascii_print(ndo, "\n\t", bp, length); /* pass on lf and indentation string */ 410 } 411 412 /* VARARGS */ 413 static void 414 ndo_error(netdissect_options *ndo, const char *fmt, ...) 415 { 416 va_list ap; 417 418 if(ndo->program_name) 419 (void)fprintf(stderr, "%s: ", ndo->program_name); 420 va_start(ap, fmt); 421 (void)vfprintf(stderr, fmt, ap); 422 va_end(ap); 423 if (*fmt) { 424 fmt += strlen(fmt); 425 if (fmt[-1] != '\n') 426 (void)fputc('\n', stderr); 427 } 428 nd_cleanup(); 429 exit(1); 430 /* NOTREACHED */ 431 } 432 433 /* VARARGS */ 434 static void 435 ndo_warning(netdissect_options *ndo, const char *fmt, ...) 436 { 437 va_list ap; 438 439 if(ndo->program_name) 440 (void)fprintf(stderr, "%s: ", ndo->program_name); 441 (void)fprintf(stderr, "WARNING: "); 442 va_start(ap, fmt); 443 (void)vfprintf(stderr, fmt, ap); 444 va_end(ap); 445 if (*fmt) { 446 fmt += strlen(fmt); 447 if (fmt[-1] != '\n') 448 (void)fputc('\n', stderr); 449 } 450 } 451 452 static int 453 ndo_printf(netdissect_options *ndo, const char *fmt, ...) 454 { 455 va_list args; 456 int ret; 457 458 va_start(args, fmt); 459 ret = vfprintf(stdout, fmt, args); 460 va_end(args); 461 462 if (ret < 0) 463 ndo_error(ndo, "Unable to write output: %s", pcap_strerror(errno)); 464 return (ret); 465 } 466 467 void 468 ndo_set_function_pointers(netdissect_options *ndo) 469 { 470 ndo->ndo_default_print=ndo_default_print; 471 ndo->ndo_printf=ndo_printf; 472 ndo->ndo_error=ndo_error; 473 ndo->ndo_warning=ndo_warning; 474 } 475 /* 476 * Local Variables: 477 * c-style: whitesmith 478 * c-basic-offset: 8 479 * End: 480 */ 481