1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" /* SunOS */ 27 28 #include <stdio.h> 29 #include <string.h> 30 #include <errno.h> 31 #include <fcntl.h> 32 #include <setjmp.h> 33 #include <sys/types.h> 34 #include <sys/signal.h> 35 #include <sys/time.h> 36 #include <sys/socket.h> 37 #include <sys/sockio.h> 38 #include <net/if.h> 39 #include <netinet/in_systm.h> 40 #include <netinet/in.h> 41 #include <netinet/ip.h> 42 #include <sys/pfmod.h> 43 #include <netinet/if_ether.h> 44 #include <sys/mman.h> 45 #include <sys/stat.h> 46 #include <sys/stropts.h> 47 #include <sys/bufmod.h> 48 49 #include <unistd.h> 50 #include <stropts.h> 51 #include <stdlib.h> 52 #include <ctype.h> 53 #include <values.h> 54 #include <libdlpi.h> 55 56 #include "snoop.h" 57 58 /* 59 * Old header format. 60 * Actually two concatenated structs: nit_bufhdr + nit_head 61 */ 62 struct ohdr { 63 /* nit_bufhdr */ 64 int o_msglen; 65 int o_totlen; 66 /* nit_head */ 67 struct timeval o_time; 68 int o_drops; 69 int o_len; 70 }; 71 72 static void scan(char *, int, int, int, int, void (*)(), int, int, int); 73 void convert_to_network(); 74 void convert_from_network(); 75 static void convert_old(struct ohdr *); 76 extern sigjmp_buf jmp_env, ojmp_env; 77 static dlpi_info_t dlinfo; 78 static char *bufp; /* pointer to read buffer */ 79 80 static int strioctl(int, int, int, int, void *); 81 82 /* 83 * Open up the device in raw mode and passive mode 84 * (see dlpi_open(3DLPI)) and start finding out something about it, 85 * especially stuff about the data link headers. We need that information 86 * to build the proper packet filters. 87 */ 88 boolean_t 89 check_device(dlpi_handle_t *dhp, char **devicep) 90 { 91 int retval; 92 93 /* 94 * Determine which network device 95 * to use if none given. 96 * Should get back a value like "le0". 97 */ 98 if (*devicep == NULL) { 99 char *cbuf; 100 static struct ifconf ifc; 101 static struct ifreq *ifr; 102 int s; 103 int n; 104 int numifs; 105 unsigned bufsize; 106 107 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) 108 pr_err("socket"); 109 110 if (ioctl(s, SIOCGIFNUM, (char *)&numifs) < 0) { 111 pr_err("check_device: ioctl SIOCGIFNUM"); 112 (void) close(s); 113 s = -1; 114 return (B_FALSE); 115 } 116 117 bufsize = numifs * sizeof (struct ifreq); 118 cbuf = (char *)malloc(bufsize); 119 if (cbuf == NULL) { 120 pr_err("out of memory\n"); 121 (void) close(s); 122 s = -1; 123 return (B_FALSE); 124 } 125 ifc.ifc_len = bufsize; 126 ifc.ifc_buf = cbuf; 127 if (ioctl(s, SIOCGIFCONF, (char *)&ifc) < 0) { 128 pr_err("check_device: ioctl SIOCGIFCONF"); 129 (void) close(s); 130 s = -1; 131 (void) free(cbuf); 132 return (B_FALSE); 133 } 134 n = ifc.ifc_len / sizeof (struct ifreq); 135 ifr = ifc.ifc_req; 136 for (; n > 0; n--, ifr++) { 137 if (strchr(ifr->ifr_name, ':') != NULL) 138 continue; 139 if (ioctl(s, SIOCGIFFLAGS, (char *)ifr) < 0) 140 pr_err("ioctl SIOCGIFFLAGS"); 141 if ((ifr->ifr_flags & 142 (IFF_VIRTUAL|IFF_LOOPBACK|IFF_UP| 143 IFF_RUNNING)) == (IFF_UP|IFF_RUNNING)) 144 break; 145 } 146 147 if (n == 0) 148 pr_err("No network interface devices found"); 149 150 *devicep = ifr->ifr_name; 151 (void) close(s); 152 } 153 154 retval = dlpi_open(*devicep, dhp, DLPI_PASSIVE|DLPI_RAW); 155 if (retval != DLPI_SUCCESS) { 156 pr_err("cannot open \"%s\": %s", *devicep, 157 dlpi_strerror(retval)); 158 } 159 160 if ((retval = dlpi_info(*dhp, &dlinfo, 0)) != DLPI_SUCCESS) 161 pr_errdlpi(*dhp, "dlpi_info failed", retval); 162 163 for (interface = &INTERFACES[0]; interface->mac_type != -1; interface++) 164 if (interface->mac_type == dlinfo.di_mactype) 165 break; 166 167 /* allow limited functionality even if interface isn't known */ 168 if (interface->mac_type == -1) { 169 (void) fprintf(stderr, "snoop: WARNING: Mac Type = %x " 170 "not supported\n", dlinfo.di_mactype); 171 } 172 173 /* for backward compatibility, allow known interface mtu_sizes */ 174 if (interface->mtu_size > dlinfo.di_max_sdu) 175 dlinfo.di_max_sdu = interface->mtu_size; 176 177 return (interface->try_kernel_filter); 178 } 179 180 /* 181 * Do whatever is necessary to initialize the interface 182 * for packet capture. Bind the device opened in check_device(), set 183 * promiscuous mode, push the streams buffer module and packet filter 184 * module, set various buffer parameters. 185 */ 186 void 187 initdevice(dlpi_handle_t dh, ulong_t snaplen, ulong_t chunksize, 188 struct timeval *timeout, struct Pf_ext_packetfilt *fp) 189 { 190 extern int Pflg; 191 int retv; 192 int netfd; 193 194 retv = dlpi_bind(dh, DLPI_ANY_SAP, NULL); 195 if (retv != DLPI_SUCCESS) 196 pr_errdlpi(dh, "cannot bind on", retv); 197 198 (void) fprintf(stderr, "Using device %s ", dlpi_linkname(dh)); 199 200 /* 201 * If Pflg not set - use physical level 202 * promiscuous mode. Otherwise - just SAP level. 203 */ 204 if (!Pflg) { 205 (void) fprintf(stderr, "(promiscuous mode)\n"); 206 retv = dlpi_promiscon(dh, DL_PROMISC_PHYS); 207 if (retv != DLPI_SUCCESS) { 208 pr_errdlpi(dh, "promiscuous mode(physical) failed", 209 retv); 210 } 211 } else { 212 (void) fprintf(stderr, "(non promiscuous)\n"); 213 retv = dlpi_promiscon(dh, DL_PROMISC_MULTI); 214 if (retv != DLPI_SUCCESS) { 215 pr_errdlpi(dh, "promiscuous mode(multicast) failed", 216 retv); 217 } 218 } 219 220 retv = dlpi_promiscon(dh, DL_PROMISC_SAP); 221 if (retv != DLPI_SUCCESS) 222 pr_errdlpi(dh, "promiscuous mode(SAP) failed", retv); 223 224 netfd = dlpi_fd(dh); 225 226 if (fp) { 227 /* 228 * push and configure the packet filtering module 229 */ 230 if (ioctl(netfd, I_PUSH, "pfmod") < 0) 231 pr_errdlpi(dh, "cannot push \"pfmod\"", DL_SYSERR); 232 233 if (strioctl(netfd, PFIOCSETF, -1, sizeof (*fp), 234 (char *)fp) < 0) 235 pr_errdlpi(dh, "PFIOCSETF", DL_SYSERR); 236 } 237 238 if (ioctl(netfd, I_PUSH, "bufmod") < 0) 239 pr_errdlpi(dh, "cannot push \"bufmod\"", DL_SYSERR); 240 241 if (strioctl(netfd, SBIOCSTIME, -1, sizeof (struct timeval), 242 (char *)timeout) < 0) 243 pr_errdlpi(dh, "SBIOCSTIME", DL_SYSERR); 244 245 if (strioctl(netfd, SBIOCSCHUNK, -1, sizeof (uint_t), 246 (char *)&chunksize) < 0) 247 pr_errdlpi(dh, "SBIOCGCHUNK", DL_SYSERR); 248 249 if (strioctl(netfd, SBIOCSSNAP, -1, sizeof (uint_t), 250 (char *)&snaplen) < 0) 251 pr_errdlpi(dh, "SBIOCSSNAP", DL_SYSERR); 252 253 /* 254 * Flush the read queue, to get rid of anything that 255 * accumulated before the device reached its final configuration. 256 */ 257 if (ioctl(netfd, I_FLUSH, FLUSHR) < 0) 258 pr_errdlpi(dh, "cannot flush \"I_FLUSH\"", DL_SYSERR); 259 } 260 261 /* 262 * Read packets from the network. Initdevice is called in 263 * here to set up the network interface for reading of 264 * raw ethernet packets in promiscuous mode into a buffer. 265 * Packets are read and either written directly to a file 266 * or interpreted for display on the fly. 267 */ 268 void 269 net_read(dlpi_handle_t dh, size_t chunksize, int filter, void (*proc)(), 270 int flags) 271 { 272 int retval; 273 extern int count; 274 size_t msglen; 275 276 count = 0; 277 278 /* allocate a read buffer */ 279 bufp = malloc(chunksize); 280 if (bufp == NULL) 281 pr_err("no memory for %d buffer", chunksize); 282 283 /* 284 * read frames 285 */ 286 for (;;) { 287 msglen = chunksize; 288 retval = dlpi_recv(dh, NULL, NULL, bufp, &msglen, -1, NULL); 289 290 if (retval != DLPI_SUCCESS || quitting) 291 break; 292 293 if (msglen != 0) 294 scan(bufp, msglen, filter, 0, 0, proc, 0, 0, flags); 295 } 296 297 free(bufp); 298 299 if (!quitting) 300 pr_errdlpi(dh, "network read failed", retval); 301 } 302 303 #ifdef DEBUG 304 /* 305 * corrupt: simulate packet corruption for debugging interpreters 306 */ 307 void 308 corrupt(volatile char *pktp, volatile char *pstop, char *buf, 309 volatile char *bufstop) 310 { 311 int c; 312 int i; 313 int p; 314 int li = rand() % (pstop - pktp - 1) + 1; 315 volatile char *pp = pktp; 316 volatile char *pe = bufstop < pstop ? bufstop : pstop; 317 318 if (pktp < buf || pktp > bufstop) 319 return; 320 321 for (pp = pktp; pp < pe; pp += li) { 322 c = ((pe - pp) < li ? pe - pp : li); 323 i = (rand() % c)>>1; 324 while (--i > 0) { 325 p = (rand() % c); 326 pp[p] = (unsigned char)(rand() & 0xFF); 327 } 328 } 329 } 330 #endif /* DEBUG */ 331 332 static void 333 scan(char *buf, int len, int filter, int cap, int old, void (*proc)(), 334 int first, int last, int flags) 335 { 336 volatile char *bp, *bufstop; 337 volatile struct sb_hdr *hdrp; 338 volatile struct sb_hdr nhdr, *nhdrp; 339 volatile char *pktp; 340 volatile struct timeval last_timestamp; 341 volatile int header_okay; 342 extern int count, maxcount; 343 extern int snoop_nrecover; 344 #ifdef DEBUG 345 extern int zflg; 346 #endif /* DEBUG */ 347 348 proc(0, 0, 0); 349 bufstop = buf + len; 350 351 /* 352 * 353 * Loop through each packet in the buffer 354 */ 355 last_timestamp.tv_sec = 0; 356 (void) memcpy((char *)ojmp_env, (char *)jmp_env, sizeof (jmp_env)); 357 for (bp = buf; bp < bufstop; bp += nhdrp->sbh_totlen) { 358 /* 359 * Gracefully exit if user terminates 360 */ 361 if (quitting) 362 break; 363 /* 364 * Global error recocery: Prepare to continue when a corrupt 365 * packet or header is encountered. 366 */ 367 if (sigsetjmp(jmp_env, 1)) { 368 goto err; 369 } 370 371 header_okay = 0; 372 hdrp = (struct sb_hdr *)bp; 373 nhdrp = hdrp; 374 pktp = (char *)hdrp + sizeof (*hdrp); 375 376 /* 377 * If reading a capture file 378 * convert the headers from network 379 * byte order (for little-endians like X86) 380 */ 381 if (cap) { 382 /* 383 * If the packets come from an old 384 * capture file, convert the header. 385 */ 386 if (old) { 387 convert_old((struct ohdr *)hdrp); 388 } 389 390 nhdrp = &nhdr; 391 392 nhdrp->sbh_origlen = ntohl(hdrp->sbh_origlen); 393 nhdrp->sbh_msglen = ntohl(hdrp->sbh_msglen); 394 nhdrp->sbh_totlen = ntohl(hdrp->sbh_totlen); 395 nhdrp->sbh_drops = ntohl(hdrp->sbh_drops); 396 nhdrp->sbh_timestamp.tv_sec = 397 ntohl(hdrp->sbh_timestamp.tv_sec); 398 nhdrp->sbh_timestamp.tv_usec = 399 ntohl(hdrp->sbh_timestamp.tv_usec); 400 } 401 402 /* Enhanced check for valid header */ 403 404 if ((nhdrp->sbh_totlen == 0) || 405 (bp + nhdrp->sbh_totlen) < bp || 406 (bp + nhdrp->sbh_totlen) > bufstop || 407 (nhdrp->sbh_origlen == 0) || 408 (bp + nhdrp->sbh_origlen) < bp || 409 (nhdrp->sbh_msglen == 0) || 410 (bp + nhdrp->sbh_msglen) < bp || 411 (bp + nhdrp->sbh_msglen) > bufstop || 412 (nhdrp->sbh_msglen > nhdrp->sbh_origlen) || 413 (nhdrp->sbh_totlen < nhdrp->sbh_msglen) || 414 (nhdrp->sbh_timestamp.tv_sec == 0)) { 415 if (cap) 416 (void) fprintf(stderr, "(warning) bad packet " 417 "header in capture file"); 418 else 419 (void) fprintf(stderr, "(warning) bad packet " 420 "header in buffer"); 421 (void) fprintf(stderr, " offset %d: length=%d\n", 422 bp - buf, nhdrp->sbh_totlen); 423 goto err; 424 } 425 426 if (nhdrp->sbh_totlen > 427 (dlinfo.di_max_sdu + MAX_HDRTRAILER)) { 428 if (cap) 429 (void) fprintf(stderr, "(warning) packet length" 430 " greater than MTU in capture file"); 431 else 432 (void) fprintf(stderr, "(warning) packet length" 433 " greater than MTU in buffer"); 434 435 (void) fprintf(stderr, " offset %d: length=%d\n", 436 bp - buf, nhdrp->sbh_totlen); 437 } 438 439 /* 440 * Check for incomplete packet. We are conservative here, 441 * since we don't know how good the checking is in other 442 * parts of the code. We pass a partial packet, with 443 * a warning. 444 */ 445 if (pktp + nhdrp->sbh_msglen > bufstop) { 446 (void) fprintf(stderr, "truncated packet buffer\n"); 447 nhdrp->sbh_msglen = bufstop - pktp; 448 } 449 450 #ifdef DEBUG 451 if (zflg) 452 corrupt(pktp, pktp + nhdrp->sbh_msglen, buf, bufstop); 453 #endif /* DEBUG */ 454 455 header_okay = 1; 456 if (!filter || 457 want_packet(pktp, 458 nhdrp->sbh_msglen, 459 nhdrp->sbh_origlen)) { 460 count++; 461 462 /* 463 * Start deadman timer for interpreter processing 464 */ 465 (void) snoop_alarm(SNOOP_ALARM_GRAN*SNOOP_MAXRECOVER, 466 NULL); 467 468 encap_levels = 0; 469 if (!cap || count >= first) 470 proc(nhdrp, pktp, count, flags); 471 472 if (cap && count >= last) { 473 (void) snoop_alarm(0, NULL); 474 break; 475 } 476 477 if (maxcount && count >= maxcount) { 478 (void) fprintf(stderr, "%d packets captured\n", 479 count); 480 exit(0); 481 } 482 483 snoop_nrecover = 0; /* success */ 484 (void) snoop_alarm(0, NULL); 485 last_timestamp = hdrp->sbh_timestamp; /* save stamp */ 486 } 487 continue; 488 err: 489 /* 490 * Corruption has been detected. Reset errors. 491 */ 492 snoop_recover(); 493 494 /* 495 * packet header was apparently okay. Continue. 496 */ 497 if (header_okay) 498 continue; 499 500 /* 501 * Otherwise try to scan forward to the next packet, using 502 * the last known timestamp if it is available. 503 */ 504 nhdrp = &nhdr; 505 nhdrp->sbh_totlen = 0; 506 if (last_timestamp.tv_sec == 0) { 507 bp += sizeof (int); 508 } else { 509 for (bp += sizeof (int); bp <= bufstop; 510 bp += sizeof (int)) { 511 hdrp = (struct sb_hdr *)bp; 512 /* An approximate timestamp located */ 513 if ((hdrp->sbh_timestamp.tv_sec >> 8) == 514 (last_timestamp.tv_sec >> 8)) 515 break; 516 } 517 } 518 } 519 /* reset jmp_env for program exit */ 520 (void) memcpy((char *)jmp_env, (char *)ojmp_env, sizeof (jmp_env)); 521 proc(0, -1, 0); 522 } 523 524 /* 525 * Called if nwrite() encounters write problems. 526 */ 527 static void 528 cap_write_error(const char *msgtype) 529 { 530 (void) fprintf(stderr, 531 "snoop: cannot write %s to capture file: %s\n", 532 msgtype, strerror(errno)); 533 exit(1); 534 } 535 536 /* 537 * Writes target buffer to the open file descriptor. Upon detection of a short 538 * write, an attempt to process the remaining bytes occurs until all anticipated 539 * bytes are written. An error status is returned to indicate any serious write 540 * failures. 541 */ 542 static int 543 nwrite(int fd, const void *buffer, size_t buflen) 544 { 545 size_t nwritten; 546 ssize_t nbytes = 0; 547 const char *buf = buffer; 548 549 for (nwritten = 0; nwritten < buflen; nwritten += nbytes) { 550 nbytes = write(fd, &buf[nwritten], buflen - nwritten); 551 if (nbytes == -1) 552 return (-1); 553 if (nbytes == 0) { 554 errno = EIO; 555 return (-1); 556 } 557 } 558 return (0); 559 } 560 561 /* 562 * Routines for opening, closing, reading and writing 563 * a capture file of packets saved with the -o option. 564 */ 565 static int capfile_out; 566 567 /* 568 * The snoop capture file has a header to identify 569 * it as a capture file and record its version. 570 * A file without this header is assumed to be an 571 * old format snoop file. 572 * 573 * A version 1 header looks like this: 574 * 575 * 0 1 2 3 4 5 6 7 8 9 10 11 576 * +---+---+---+---+---+---+---+---+---+---+---+---+---+ 577 * | s | n | o | o | p | \0| \0| \0| version | data 578 * +---+---+---+---+---+---+---+---+---+---+---+---+---+ 579 * | word 0 | word 1 | word 2 | 580 * 581 * 582 * A version 2 header adds a word that identifies the MAC type. 583 * This allows for capture files from FDDI etc. 584 * 585 * 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 586 * +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+ 587 * | s | n | o | o | p | \0| \0| \0| version | MAC type | data 588 * +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+ 589 * | word 0 | word 1 | word 2 | word 3 590 * 591 */ 592 static const char *snoop_id = "snoop\0\0\0"; 593 static const int snoop_idlen = 8; 594 static const int snoop_version = 2; 595 596 void 597 cap_open_write(const char *name) 598 { 599 int vers; 600 601 capfile_out = open(name, O_CREAT | O_TRUNC | O_RDWR, 0666); 602 if (capfile_out < 0) 603 pr_err("%s: %m", name); 604 605 vers = htonl(snoop_version); 606 if (nwrite(capfile_out, snoop_id, snoop_idlen) == -1) 607 cap_write_error("snoop_id"); 608 609 if (nwrite(capfile_out, &vers, sizeof (int)) == -1) 610 cap_write_error("version"); 611 } 612 613 614 void 615 cap_close(void) 616 { 617 (void) close(capfile_out); 618 } 619 620 static char *cap_buffp = NULL; 621 static int cap_len = 0; 622 static int cap_new; 623 624 void 625 cap_open_read(const char *name) 626 { 627 struct stat st; 628 int cap_vers; 629 int *word, device_mac_type; 630 int capfile_in; 631 632 capfile_in = open(name, O_RDONLY); 633 if (capfile_in < 0) 634 pr_err("couldn't open %s: %m", name); 635 636 if (fstat(capfile_in, &st) < 0) 637 pr_err("couldn't stat %s: %m", name); 638 cap_len = st.st_size; 639 640 cap_buffp = mmap(0, cap_len, PROT_READ, MAP_PRIVATE, capfile_in, 0); 641 (void) close(capfile_in); 642 if ((int)cap_buffp == -1) 643 pr_err("couldn't mmap %s: %m", name); 644 645 /* Check if new snoop capture file format */ 646 647 cap_new = bcmp(cap_buffp, snoop_id, snoop_idlen) == 0; 648 649 /* 650 * If new file - check version and 651 * set buffer pointer to point at first packet 652 */ 653 if (cap_new) { 654 cap_vers = ntohl(*(int *)(cap_buffp + snoop_idlen)); 655 cap_buffp += snoop_idlen + sizeof (int); 656 cap_len -= snoop_idlen + sizeof (int); 657 658 switch (cap_vers) { 659 case 1: 660 device_mac_type = DL_ETHER; 661 break; 662 663 case 2: 664 device_mac_type = ntohl(*((int *)cap_buffp)); 665 cap_buffp += sizeof (int); 666 cap_len -= sizeof (int); 667 break; 668 669 default: 670 pr_err("capture file: %s: Version %d unrecognized\n", 671 name, cap_vers); 672 } 673 674 for (interface = &INTERFACES[0]; interface->mac_type != -1; 675 interface++) 676 if (interface->mac_type == device_mac_type) 677 break; 678 679 if (interface->mac_type == -1) 680 pr_err("Mac Type = %x is not supported\n", 681 device_mac_type); 682 } else { 683 /* Use heuristic to check if it's an old-style file */ 684 685 device_mac_type = DL_ETHER; 686 word = (int *)cap_buffp; 687 688 if (!((word[0] < 1600 && word[1] < 1600) && 689 (word[0] < word[1]) && 690 (word[2] > 610000000 && word[2] < 770000000))) 691 pr_err("not a capture file: %s", name); 692 693 /* Change protection so's we can fix the headers */ 694 695 if (mprotect(cap_buffp, cap_len, PROT_READ | PROT_WRITE) < 0) 696 pr_err("mprotect: %s: %m", name); 697 } 698 dlinfo.di_max_sdu = MAXINT; /* Decode any stored packet. */ 699 } 700 701 void 702 cap_read(int first, int last, int filter, void (*proc)(), int flags) 703 { 704 extern int count; 705 706 count = 0; 707 708 scan(cap_buffp, cap_len, filter, 1, !cap_new, proc, first, last, flags); 709 710 (void) munmap(cap_buffp, cap_len); 711 } 712 713 /* ARGSUSED */ 714 void 715 cap_write(struct sb_hdr *hdrp, char *pktp, int num, int flags) 716 { 717 int pktlen, mac; 718 static int first = 1; 719 struct sb_hdr nhdr; 720 extern boolean_t qflg; 721 722 if (hdrp == NULL) 723 return; 724 725 if (first) { 726 first = 0; 727 mac = htonl(interface->mac_type); 728 if (nwrite(capfile_out, &mac, sizeof (int)) == -1) 729 cap_write_error("mac_type"); 730 } 731 732 pktlen = hdrp->sbh_totlen - sizeof (*hdrp); 733 734 /* 735 * Convert sb_hdr to network byte order 736 */ 737 nhdr.sbh_origlen = htonl(hdrp->sbh_origlen); 738 nhdr.sbh_msglen = htonl(hdrp->sbh_msglen); 739 nhdr.sbh_totlen = htonl(hdrp->sbh_totlen); 740 nhdr.sbh_drops = htonl(hdrp->sbh_drops); 741 nhdr.sbh_timestamp.tv_sec = htonl(hdrp->sbh_timestamp.tv_sec); 742 nhdr.sbh_timestamp.tv_usec = htonl(hdrp->sbh_timestamp.tv_usec); 743 744 if (nwrite(capfile_out, &nhdr, sizeof (nhdr)) == -1) 745 cap_write_error("packet header"); 746 747 if (nwrite(capfile_out, pktp, pktlen) == -1) 748 cap_write_error("packet"); 749 750 if (! qflg) 751 show_count(); 752 } 753 754 /* 755 * Convert a packet header from 756 * old to new format. 757 */ 758 static void 759 convert_old(struct ohdr *ohdrp) 760 { 761 struct sb_hdr nhdr; 762 763 nhdr.sbh_origlen = ohdrp->o_len; 764 nhdr.sbh_msglen = ohdrp->o_msglen; 765 nhdr.sbh_totlen = ohdrp->o_totlen; 766 nhdr.sbh_drops = ohdrp->o_drops; 767 nhdr.sbh_timestamp = ohdrp->o_time; 768 769 *(struct sb_hdr *)ohdrp = nhdr; 770 } 771 772 static int 773 strioctl(int fd, int cmd, int timout, int len, void *dp) 774 { 775 struct strioctl sioc; 776 int rc; 777 778 sioc.ic_cmd = cmd; 779 sioc.ic_timout = timout; 780 sioc.ic_len = len; 781 sioc.ic_dp = dp; 782 rc = ioctl(fd, I_STR, &sioc); 783 784 if (rc < 0) 785 return (rc); 786 else 787 return (sioc.ic_len); 788 } 789