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 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <stdio.h> 27 #include <string.h> 28 #include <strings.h> 29 #include <errno.h> 30 #include <fcntl.h> 31 #include <setjmp.h> 32 #include <sys/types.h> 33 #include <sys/signal.h> 34 #include <sys/time.h> 35 #include <sys/socket.h> 36 #include <sys/sockio.h> 37 #include <netinet/in.h> 38 #include <netinet/ip.h> 39 #include <sys/pfmod.h> 40 #include <sys/mman.h> 41 #include <sys/stat.h> 42 #include <sys/bufmod.h> 43 44 #include <unistd.h> 45 #include <stropts.h> 46 #include <stdlib.h> 47 #include <ctype.h> 48 #include <values.h> 49 #include <libdlpi.h> 50 51 #include "snoop.h" 52 53 /* 54 * Old header format. 55 * Actually two concatenated structs: nit_bufhdr + nit_head 56 */ 57 struct ohdr { 58 /* nit_bufhdr */ 59 int o_msglen; 60 int o_totlen; 61 /* nit_head */ 62 struct timeval o_time; 63 int o_drops; 64 int o_len; 65 }; 66 67 static void scan(char *, int, int, int, int, void (*)(), int, int, int); 68 void convert_to_network(); 69 void convert_from_network(); 70 static void convert_old(struct ohdr *); 71 extern sigjmp_buf jmp_env, ojmp_env; 72 static char *bufp; /* pointer to read buffer */ 73 74 static int strioctl(int, int, int, int, void *); 75 76 enum { DWA_NONE, DWA_EXISTS, DWA_PLUMBED }; 77 78 typedef struct dlpi_walk_arg { 79 char dwa_linkname[MAXLINKNAMELEN]; 80 int dwa_type; /* preference type above */ 81 int dwa_s4; /* IPv4 socket */ 82 int dwa_s6; /* IPv6 socket */ 83 } dlpi_walk_arg_t; 84 85 static boolean_t 86 select_datalink(const char *linkname, void *arg) 87 { 88 struct lifreq lifr; 89 dlpi_walk_arg_t *dwap = arg; 90 int s4 = dwap->dwa_s4; 91 int s6 = dwap->dwa_s6; 92 93 (void) strlcpy(dwap->dwa_linkname, linkname, MAXLINKNAMELEN); 94 dwap->dwa_type = DWA_EXISTS; 95 96 /* 97 * See if it's plumbed by IP. We prefer such links because they're 98 * more likely to have interesting traffic. 99 */ 100 bzero(&lifr, sizeof (lifr)); 101 (void) strlcpy(lifr.lifr_name, linkname, LIFNAMSIZ); 102 if ((s4 != -1 && ioctl(s4, SIOCGLIFFLAGS, &lifr) != -1) || 103 (s6 != -1 && ioctl(s6, SIOCGLIFFLAGS, &lifr) != -1)) { 104 dwap->dwa_type = DWA_PLUMBED; 105 return (B_TRUE); 106 } 107 return (B_FALSE); 108 } 109 110 /* 111 * Open `linkname' in raw/passive mode (see dlpi_open(3DLPI)). If `linkname' 112 * is NULL, pick a datalink as per snoop(1M). Also gather some information 113 * about the datalink useful for building the proper packet filters. 114 */ 115 boolean_t 116 open_datalink(dlpi_handle_t *dhp, const char *linkname) 117 { 118 int retval; 119 int flags = DLPI_PASSIVE | DLPI_RAW; 120 dlpi_walk_arg_t dwa; 121 dlpi_info_t dlinfo; 122 123 if (linkname == NULL) { 124 /* 125 * Select a datalink to use by default. Prefer datalinks that 126 * are plumbed by IP. 127 */ 128 bzero(&dwa, sizeof (dwa)); 129 dwa.dwa_s4 = socket(AF_INET, SOCK_DGRAM, 0); 130 dwa.dwa_s6 = socket(AF_INET6, SOCK_DGRAM, 0); 131 dlpi_walk(select_datalink, &dwa, 0); 132 (void) close(dwa.dwa_s4); 133 (void) close(dwa.dwa_s6); 134 135 if (dwa.dwa_type == DWA_NONE) 136 pr_err("no datalinks found"); 137 if (dwa.dwa_type == DWA_EXISTS) { 138 (void) fprintf(stderr, "snoop: WARNING: " 139 "no datalinks plumbed for IP traffic\n"); 140 } 141 linkname = dwa.dwa_linkname; 142 } 143 if (Iflg) 144 flags |= DLPI_DEVIPNET; 145 if (Iflg || strcmp(linkname, "lo0") == 0) 146 flags |= DLPI_IPNETINFO; 147 if ((retval = dlpi_open(linkname, dhp, flags)) != DLPI_SUCCESS) { 148 pr_err("cannot open \"%s\": %s", linkname, 149 dlpi_strerror(retval)); 150 } 151 152 if ((retval = dlpi_info(*dhp, &dlinfo, 0)) != DLPI_SUCCESS) 153 pr_errdlpi(*dhp, "dlpi_info failed", retval); 154 155 for (interface = &INTERFACES[0]; interface->mac_type != -1; interface++) 156 if (interface->mac_type == dlinfo.di_mactype) 157 break; 158 159 /* allow limited functionality even if interface isn't known */ 160 if (interface->mac_type == -1) { 161 (void) fprintf(stderr, "snoop: WARNING: Mac Type = %x " 162 "not supported\n", dlinfo.di_mactype); 163 } 164 165 return (interface->try_kernel_filter); 166 } 167 168 /* 169 * Initialize `dh' for packet capture using the provided arguments. 170 */ 171 void 172 init_datalink(dlpi_handle_t dh, ulong_t snaplen, ulong_t chunksize, 173 struct timeval *timeout, struct Pf_ext_packetfilt *fp) 174 { 175 int retv; 176 int netfd; 177 178 retv = dlpi_bind(dh, DLPI_ANY_SAP, NULL); 179 if (retv != DLPI_SUCCESS) 180 pr_errdlpi(dh, "cannot bind on", retv); 181 182 if (Iflg) { 183 (void) fprintf(stderr, "Using device ipnet/%s ", 184 dlpi_linkname(dh)); 185 } else { 186 (void) fprintf(stderr, "Using device %s ", dlpi_linkname(dh)); 187 } 188 189 /* 190 * If Pflg not set - use physical level 191 * promiscuous mode. Otherwise - just SAP level. 192 */ 193 if (!Pflg) { 194 (void) fprintf(stderr, "(promiscuous mode)\n"); 195 retv = dlpi_promiscon(dh, DL_PROMISC_PHYS); 196 if (retv != DLPI_SUCCESS) { 197 pr_errdlpi(dh, "promiscuous mode(physical) failed", 198 retv); 199 } 200 } else { 201 (void) fprintf(stderr, "(non promiscuous)\n"); 202 retv = dlpi_promiscon(dh, DL_PROMISC_MULTI); 203 if (retv != DLPI_SUCCESS) { 204 pr_errdlpi(dh, "promiscuous mode(multicast) failed", 205 retv); 206 } 207 } 208 209 retv = dlpi_promiscon(dh, DL_PROMISC_SAP); 210 if (retv != DLPI_SUCCESS) 211 pr_errdlpi(dh, "promiscuous mode(SAP) failed", retv); 212 213 netfd = dlpi_fd(dh); 214 215 if (fp) { 216 /* 217 * push and configure the packet filtering module 218 */ 219 if (ioctl(netfd, I_PUSH, "pfmod") < 0) 220 pr_errdlpi(dh, "cannot push \"pfmod\"", DL_SYSERR); 221 222 if (strioctl(netfd, PFIOCSETF, -1, sizeof (*fp), 223 (char *)fp) < 0) 224 pr_errdlpi(dh, "PFIOCSETF", DL_SYSERR); 225 } 226 227 if (ioctl(netfd, I_PUSH, "bufmod") < 0) 228 pr_errdlpi(dh, "cannot push \"bufmod\"", DL_SYSERR); 229 230 if (strioctl(netfd, SBIOCSTIME, -1, sizeof (struct timeval), 231 (char *)timeout) < 0) 232 pr_errdlpi(dh, "SBIOCSTIME", DL_SYSERR); 233 234 if (strioctl(netfd, SBIOCSCHUNK, -1, sizeof (uint_t), 235 (char *)&chunksize) < 0) 236 pr_errdlpi(dh, "SBIOCGCHUNK", DL_SYSERR); 237 238 if (strioctl(netfd, SBIOCSSNAP, -1, sizeof (uint_t), 239 (char *)&snaplen) < 0) 240 pr_errdlpi(dh, "SBIOCSSNAP", DL_SYSERR); 241 242 /* 243 * Flush the read queue, to get rid of anything that 244 * accumulated before the device reached its final configuration. 245 */ 246 if (ioctl(netfd, I_FLUSH, FLUSHR) < 0) 247 pr_errdlpi(dh, "cannot flush \"I_FLUSH\"", DL_SYSERR); 248 } 249 250 /* 251 * Read packets from the network. init_datalink() is called in 252 * here to set up the network interface for reading of 253 * raw ethernet packets in promiscuous mode into a buffer. 254 * Packets are read and either written directly to a file 255 * or interpreted for display on the fly. 256 */ 257 void 258 net_read(dlpi_handle_t dh, size_t chunksize, int filter, void (*proc)(), 259 int flags) 260 { 261 int retval; 262 extern int count; 263 size_t msglen; 264 265 count = 0; 266 267 /* allocate a read buffer */ 268 bufp = malloc(chunksize); 269 if (bufp == NULL) 270 pr_err("no memory for %d buffer", chunksize); 271 272 /* 273 * read frames 274 */ 275 for (;;) { 276 msglen = chunksize; 277 retval = dlpi_recv(dh, NULL, NULL, bufp, &msglen, -1, NULL); 278 279 if (retval != DLPI_SUCCESS || quitting) 280 break; 281 282 if (msglen != 0) 283 scan(bufp, msglen, filter, 0, 0, proc, 0, 0, flags); 284 } 285 286 free(bufp); 287 288 if (!quitting) 289 pr_errdlpi(dh, "network read failed", retval); 290 } 291 292 #ifdef DEBUG 293 /* 294 * corrupt: simulate packet corruption for debugging interpreters 295 */ 296 void 297 corrupt(volatile char *pktp, volatile char *pstop, char *buf, 298 volatile char *bufstop) 299 { 300 int c; 301 int i; 302 int p; 303 int li = rand() % (pstop - pktp - 1) + 1; 304 volatile char *pp = pktp; 305 volatile char *pe = bufstop < pstop ? bufstop : pstop; 306 307 if (pktp < buf || pktp > bufstop) 308 return; 309 310 for (pp = pktp; pp < pe; pp += li) { 311 c = ((pe - pp) < li ? pe - pp : li); 312 i = (rand() % c)>>1; 313 while (--i > 0) { 314 p = (rand() % c); 315 pp[p] = (unsigned char)(rand() & 0xFF); 316 } 317 } 318 } 319 #endif /* DEBUG */ 320 321 static void 322 scan(char *buf, int len, int filter, int cap, int old, void (*proc)(), 323 int first, int last, int flags) 324 { 325 volatile char *bp, *bufstop; 326 volatile struct sb_hdr *hdrp; 327 volatile struct sb_hdr nhdr, *nhdrp; 328 volatile char *pktp; 329 volatile struct timeval last_timestamp; 330 volatile int header_okay; 331 extern int count, maxcount; 332 extern int snoop_nrecover; 333 #ifdef DEBUG 334 extern int zflg; 335 #endif /* DEBUG */ 336 337 proc(0, 0, 0); 338 bufstop = buf + len; 339 340 /* 341 * 342 * Loop through each packet in the buffer 343 */ 344 last_timestamp.tv_sec = 0; 345 (void) memcpy((char *)ojmp_env, (char *)jmp_env, sizeof (jmp_env)); 346 for (bp = buf; bp < bufstop; bp += nhdrp->sbh_totlen) { 347 /* 348 * Gracefully exit if user terminates 349 */ 350 if (quitting) 351 break; 352 /* 353 * Global error recocery: Prepare to continue when a corrupt 354 * packet or header is encountered. 355 */ 356 if (sigsetjmp(jmp_env, 1)) { 357 goto err; 358 } 359 360 header_okay = 0; 361 hdrp = (struct sb_hdr *)bp; 362 nhdrp = hdrp; 363 pktp = (char *)hdrp + sizeof (*hdrp); 364 365 /* 366 * If reading a capture file 367 * convert the headers from network 368 * byte order (for little-endians like X86) 369 */ 370 if (cap) { 371 /* 372 * If the packets come from an old 373 * capture file, convert the header. 374 */ 375 if (old) { 376 convert_old((struct ohdr *)hdrp); 377 } 378 379 nhdrp = &nhdr; 380 381 nhdrp->sbh_origlen = ntohl(hdrp->sbh_origlen); 382 nhdrp->sbh_msglen = ntohl(hdrp->sbh_msglen); 383 nhdrp->sbh_totlen = ntohl(hdrp->sbh_totlen); 384 nhdrp->sbh_drops = ntohl(hdrp->sbh_drops); 385 nhdrp->sbh_timestamp.tv_sec = 386 ntohl(hdrp->sbh_timestamp.tv_sec); 387 nhdrp->sbh_timestamp.tv_usec = 388 ntohl(hdrp->sbh_timestamp.tv_usec); 389 } 390 391 /* Enhanced check for valid header */ 392 393 if ((nhdrp->sbh_totlen == 0) || 394 (bp + nhdrp->sbh_totlen) < bp || 395 (bp + nhdrp->sbh_totlen) > bufstop || 396 (nhdrp->sbh_origlen == 0) || 397 (bp + nhdrp->sbh_origlen) < bp || 398 (nhdrp->sbh_msglen == 0) || 399 (bp + nhdrp->sbh_msglen) < bp || 400 (bp + nhdrp->sbh_msglen) > bufstop || 401 (nhdrp->sbh_msglen > nhdrp->sbh_origlen) || 402 (nhdrp->sbh_totlen < nhdrp->sbh_msglen) || 403 (nhdrp->sbh_timestamp.tv_sec == 0)) { 404 if (cap) { 405 (void) fprintf(stderr, "(warning) bad packet " 406 "header in capture file"); 407 } else { 408 (void) fprintf(stderr, "(warning) bad packet " 409 "header in buffer"); 410 } 411 (void) fprintf(stderr, " offset %d: length=%d\n", 412 bp - buf, nhdrp->sbh_totlen); 413 goto err; 414 } 415 416 /* 417 * Check for incomplete packet. We are conservative here, 418 * since we don't know how good the checking is in other 419 * parts of the code. We pass a partial packet, with 420 * a warning. 421 */ 422 if (pktp + nhdrp->sbh_msglen > bufstop) { 423 (void) fprintf(stderr, "truncated packet buffer\n"); 424 nhdrp->sbh_msglen = bufstop - pktp; 425 } 426 427 #ifdef DEBUG 428 if (zflg) 429 corrupt(pktp, pktp + nhdrp->sbh_msglen, buf, bufstop); 430 #endif /* DEBUG */ 431 432 header_okay = 1; 433 if (!filter || 434 want_packet((uchar_t *)pktp, 435 nhdrp->sbh_msglen, 436 nhdrp->sbh_origlen)) { 437 count++; 438 439 /* 440 * Start deadman timer for interpreter processing 441 */ 442 (void) snoop_alarm(SNOOP_ALARM_GRAN*SNOOP_MAXRECOVER, 443 NULL); 444 445 encap_levels = 0; 446 if (!cap || count >= first) 447 proc(nhdrp, pktp, count, flags); 448 449 if (cap && count >= last) { 450 (void) snoop_alarm(0, NULL); 451 break; 452 } 453 454 if (maxcount && count >= maxcount) { 455 (void) fprintf(stderr, "%d packets captured\n", 456 count); 457 exit(0); 458 } 459 460 snoop_nrecover = 0; /* success */ 461 (void) snoop_alarm(0, NULL); 462 last_timestamp = hdrp->sbh_timestamp; /* save stamp */ 463 } 464 continue; 465 err: 466 /* 467 * Corruption has been detected. Reset errors. 468 */ 469 snoop_recover(); 470 471 /* 472 * packet header was apparently okay. Continue. 473 */ 474 if (header_okay) 475 continue; 476 477 /* 478 * Otherwise try to scan forward to the next packet, using 479 * the last known timestamp if it is available. 480 */ 481 nhdrp = &nhdr; 482 nhdrp->sbh_totlen = 0; 483 if (last_timestamp.tv_sec == 0) { 484 bp += sizeof (int); 485 } else { 486 for (bp += sizeof (int); bp <= bufstop; 487 bp += sizeof (int)) { 488 hdrp = (struct sb_hdr *)bp; 489 /* An approximate timestamp located */ 490 if ((hdrp->sbh_timestamp.tv_sec >> 8) == 491 (last_timestamp.tv_sec >> 8)) 492 break; 493 } 494 } 495 } 496 /* reset jmp_env for program exit */ 497 (void) memcpy((char *)jmp_env, (char *)ojmp_env, sizeof (jmp_env)); 498 proc(0, -1, 0); 499 } 500 501 /* 502 * Called if nwrite() encounters write problems. 503 */ 504 static void 505 cap_write_error(const char *msgtype) 506 { 507 (void) fprintf(stderr, 508 "snoop: cannot write %s to capture file: %s\n", 509 msgtype, strerror(errno)); 510 exit(1); 511 } 512 513 /* 514 * Writes target buffer to the open file descriptor. Upon detection of a short 515 * write, an attempt to process the remaining bytes occurs until all anticipated 516 * bytes are written. An error status is returned to indicate any serious write 517 * failures. 518 */ 519 static int 520 nwrite(int fd, const void *buffer, size_t buflen) 521 { 522 size_t nwritten; 523 ssize_t nbytes = 0; 524 const char *buf = buffer; 525 526 for (nwritten = 0; nwritten < buflen; nwritten += nbytes) { 527 nbytes = write(fd, &buf[nwritten], buflen - nwritten); 528 if (nbytes == -1) 529 return (-1); 530 if (nbytes == 0) { 531 errno = EIO; 532 return (-1); 533 } 534 } 535 return (0); 536 } 537 538 /* 539 * Routines for opening, closing, reading and writing 540 * a capture file of packets saved with the -o option. 541 */ 542 static int capfile_out; 543 544 /* 545 * The snoop capture file has a header to identify 546 * it as a capture file and record its version. 547 * A file without this header is assumed to be an 548 * old format snoop file. 549 * 550 * A version 1 header looks like this: 551 * 552 * 0 1 2 3 4 5 6 7 8 9 10 11 553 * +---+---+---+---+---+---+---+---+---+---+---+---+---+ 554 * | s | n | o | o | p | \0| \0| \0| version | data 555 * +---+---+---+---+---+---+---+---+---+---+---+---+---+ 556 * | word 0 | word 1 | word 2 | 557 * 558 * 559 * A version 2 header adds a word that identifies the MAC type. 560 * This allows for capture files from FDDI etc. 561 * 562 * 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 563 * +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+ 564 * | s | n | o | o | p | \0| \0| \0| version | MAC type | data 565 * +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+ 566 * | word 0 | word 1 | word 2 | word 3 567 * 568 */ 569 static const char *snoop_id = "snoop\0\0\0"; 570 static const int snoop_idlen = 8; 571 static const int snoop_version = 2; 572 573 void 574 cap_open_write(const char *name) 575 { 576 int vers; 577 578 capfile_out = open(name, O_CREAT | O_TRUNC | O_RDWR, 0666); 579 if (capfile_out < 0) 580 pr_err("%s: %m", name); 581 582 vers = htonl(snoop_version); 583 if (nwrite(capfile_out, snoop_id, snoop_idlen) == -1) 584 cap_write_error("snoop_id"); 585 586 if (nwrite(capfile_out, &vers, sizeof (int)) == -1) 587 cap_write_error("version"); 588 } 589 590 591 void 592 cap_close(void) 593 { 594 (void) close(capfile_out); 595 } 596 597 static char *cap_buffp = NULL; 598 static int cap_len = 0; 599 static int cap_new; 600 601 void 602 cap_open_read(const char *name) 603 { 604 struct stat st; 605 int cap_vers; 606 int *word, device_mac_type; 607 int capfile_in; 608 609 capfile_in = open(name, O_RDONLY); 610 if (capfile_in < 0) 611 pr_err("couldn't open %s: %m", name); 612 613 if (fstat(capfile_in, &st) < 0) 614 pr_err("couldn't stat %s: %m", name); 615 cap_len = st.st_size; 616 617 cap_buffp = mmap(0, cap_len, PROT_READ, MAP_PRIVATE, capfile_in, 0); 618 (void) close(capfile_in); 619 if ((int)cap_buffp == -1) 620 pr_err("couldn't mmap %s: %m", name); 621 622 /* Check if new snoop capture file format */ 623 624 cap_new = bcmp(cap_buffp, snoop_id, snoop_idlen) == 0; 625 626 /* 627 * If new file - check version and 628 * set buffer pointer to point at first packet 629 */ 630 if (cap_new) { 631 cap_vers = ntohl(*(int *)(cap_buffp + snoop_idlen)); 632 cap_buffp += snoop_idlen + sizeof (int); 633 cap_len -= snoop_idlen + sizeof (int); 634 635 switch (cap_vers) { 636 case 1: 637 device_mac_type = DL_ETHER; 638 break; 639 640 case 2: 641 device_mac_type = ntohl(*((int *)cap_buffp)); 642 cap_buffp += sizeof (int); 643 cap_len -= sizeof (int); 644 break; 645 646 default: 647 pr_err("capture file: %s: Version %d unrecognized\n", 648 name, cap_vers); 649 } 650 651 for (interface = &INTERFACES[0]; interface->mac_type != -1; 652 interface++) 653 if (interface->mac_type == device_mac_type) 654 break; 655 656 if (interface->mac_type == -1) 657 pr_err("Mac Type = %x is not supported\n", 658 device_mac_type); 659 } else { 660 /* Use heuristic to check if it's an old-style file */ 661 662 device_mac_type = DL_ETHER; 663 word = (int *)cap_buffp; 664 665 if (!((word[0] < 1600 && word[1] < 1600) && 666 (word[0] < word[1]) && 667 (word[2] > 610000000 && word[2] < 770000000))) 668 pr_err("not a capture file: %s", name); 669 670 /* Change protection so's we can fix the headers */ 671 672 if (mprotect(cap_buffp, cap_len, PROT_READ | PROT_WRITE) < 0) 673 pr_err("mprotect: %s: %m", name); 674 } 675 } 676 677 void 678 cap_read(int first, int last, int filter, void (*proc)(), int flags) 679 { 680 extern int count; 681 682 count = 0; 683 684 scan(cap_buffp, cap_len, filter, 1, !cap_new, proc, first, last, flags); 685 686 (void) munmap(cap_buffp, cap_len); 687 } 688 689 /* ARGSUSED */ 690 void 691 cap_write(struct sb_hdr *hdrp, char *pktp, int num, int flags) 692 { 693 int pktlen, mac; 694 static int first = 1; 695 struct sb_hdr nhdr; 696 extern boolean_t qflg; 697 698 if (hdrp == NULL) 699 return; 700 701 if (first) { 702 first = 0; 703 mac = htonl(interface->mac_type); 704 if (nwrite(capfile_out, &mac, sizeof (int)) == -1) 705 cap_write_error("mac_type"); 706 } 707 708 pktlen = hdrp->sbh_totlen - sizeof (*hdrp); 709 710 /* 711 * Convert sb_hdr to network byte order 712 */ 713 nhdr.sbh_origlen = htonl(hdrp->sbh_origlen); 714 nhdr.sbh_msglen = htonl(hdrp->sbh_msglen); 715 nhdr.sbh_totlen = htonl(hdrp->sbh_totlen); 716 nhdr.sbh_drops = htonl(hdrp->sbh_drops); 717 nhdr.sbh_timestamp.tv_sec = htonl(hdrp->sbh_timestamp.tv_sec); 718 nhdr.sbh_timestamp.tv_usec = htonl(hdrp->sbh_timestamp.tv_usec); 719 720 if (nwrite(capfile_out, &nhdr, sizeof (nhdr)) == -1) 721 cap_write_error("packet header"); 722 723 if (nwrite(capfile_out, pktp, pktlen) == -1) 724 cap_write_error("packet"); 725 726 if (! qflg) 727 show_count(); 728 } 729 730 /* 731 * Convert a packet header from 732 * old to new format. 733 */ 734 static void 735 convert_old(struct ohdr *ohdrp) 736 { 737 struct sb_hdr nhdr; 738 739 nhdr.sbh_origlen = ohdrp->o_len; 740 nhdr.sbh_msglen = ohdrp->o_msglen; 741 nhdr.sbh_totlen = ohdrp->o_totlen; 742 nhdr.sbh_drops = ohdrp->o_drops; 743 nhdr.sbh_timestamp = ohdrp->o_time; 744 745 *(struct sb_hdr *)ohdrp = nhdr; 746 } 747 748 static int 749 strioctl(int fd, int cmd, int timout, int len, void *dp) 750 { 751 struct strioctl sioc; 752 int rc; 753 754 sioc.ic_cmd = cmd; 755 sioc.ic_timout = timout; 756 sioc.ic_len = len; 757 sioc.ic_dp = dp; 758 rc = ioctl(fd, I_STR, &sioc); 759 760 if (rc < 0) 761 return (rc); 762 else 763 return (sioc.ic_len); 764 } 765