1 /* $OpenBSD: misc.c,v 1.71 2009/02/21 19:32:04 tobias Exp $ */ 2 /* 3 * Copyright (c) 2000 Markus Friedl. All rights reserved. 4 * Copyright (c) 2005,2006 Damien Miller. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include "includes.h" 28 29 #include <sys/types.h> 30 #include <sys/ioctl.h> 31 #include <sys/socket.h> 32 #include <sys/param.h> 33 34 #include <stdarg.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <unistd.h> 39 40 #include <netinet/in.h> 41 #include <netinet/tcp.h> 42 43 #include <errno.h> 44 #include <fcntl.h> 45 #include <netdb.h> 46 #ifdef HAVE_PATHS_H 47 # include <paths.h> 48 #include <pwd.h> 49 #endif 50 #ifdef SSH_TUN_OPENBSD 51 #include <net/if.h> 52 #endif 53 54 #include "xmalloc.h" 55 #include "misc.h" 56 #include "log.h" 57 #include "ssh.h" 58 59 /* remove newline at end of string */ 60 char * 61 chop(char *s) 62 { 63 char *t = s; 64 while (*t) { 65 if (*t == '\n' || *t == '\r') { 66 *t = '\0'; 67 return s; 68 } 69 t++; 70 } 71 return s; 72 73 } 74 75 /* set/unset filedescriptor to non-blocking */ 76 int 77 set_nonblock(int fd) 78 { 79 int val; 80 81 val = fcntl(fd, F_GETFL, 0); 82 if (val < 0) { 83 error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno)); 84 return (-1); 85 } 86 if (val & O_NONBLOCK) { 87 debug3("fd %d is O_NONBLOCK", fd); 88 return (0); 89 } 90 debug2("fd %d setting O_NONBLOCK", fd); 91 val |= O_NONBLOCK; 92 if (fcntl(fd, F_SETFL, val) == -1) { 93 debug("fcntl(%d, F_SETFL, O_NONBLOCK): %s", fd, 94 strerror(errno)); 95 return (-1); 96 } 97 return (0); 98 } 99 100 int 101 unset_nonblock(int fd) 102 { 103 int val; 104 105 val = fcntl(fd, F_GETFL, 0); 106 if (val < 0) { 107 error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno)); 108 return (-1); 109 } 110 if (!(val & O_NONBLOCK)) { 111 debug3("fd %d is not O_NONBLOCK", fd); 112 return (0); 113 } 114 debug("fd %d clearing O_NONBLOCK", fd); 115 val &= ~O_NONBLOCK; 116 if (fcntl(fd, F_SETFL, val) == -1) { 117 debug("fcntl(%d, F_SETFL, ~O_NONBLOCK): %s", 118 fd, strerror(errno)); 119 return (-1); 120 } 121 return (0); 122 } 123 124 const char * 125 ssh_gai_strerror(int gaierr) 126 { 127 if (gaierr == EAI_SYSTEM) 128 return strerror(errno); 129 return gai_strerror(gaierr); 130 } 131 132 /* disable nagle on socket */ 133 void 134 set_nodelay(int fd) 135 { 136 int opt; 137 socklen_t optlen; 138 139 optlen = sizeof opt; 140 if (getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, &optlen) == -1) { 141 debug("getsockopt TCP_NODELAY: %.100s", strerror(errno)); 142 return; 143 } 144 if (opt == 1) { 145 debug2("fd %d is TCP_NODELAY", fd); 146 return; 147 } 148 opt = 1; 149 debug2("fd %d setting TCP_NODELAY", fd); 150 if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof opt) == -1) 151 error("setsockopt TCP_NODELAY: %.100s", strerror(errno)); 152 } 153 154 /* Characters considered whitespace in strsep calls. */ 155 #define WHITESPACE " \t\r\n" 156 #define QUOTE "\"" 157 158 /* return next token in configuration line */ 159 char * 160 strdelim(char **s) 161 { 162 char *old; 163 int wspace = 0; 164 165 if (*s == NULL) 166 return NULL; 167 168 old = *s; 169 170 *s = strpbrk(*s, WHITESPACE QUOTE "="); 171 if (*s == NULL) 172 return (old); 173 174 if (*s[0] == '\"') { 175 memmove(*s, *s + 1, strlen(*s)); /* move nul too */ 176 /* Find matching quote */ 177 if ((*s = strpbrk(*s, QUOTE)) == NULL) { 178 return (NULL); /* no matching quote */ 179 } else { 180 *s[0] = '\0'; 181 return (old); 182 } 183 } 184 185 /* Allow only one '=' to be skipped */ 186 if (*s[0] == '=') 187 wspace = 1; 188 *s[0] = '\0'; 189 190 /* Skip any extra whitespace after first token */ 191 *s += strspn(*s + 1, WHITESPACE) + 1; 192 if (*s[0] == '=' && !wspace) 193 *s += strspn(*s + 1, WHITESPACE) + 1; 194 195 return (old); 196 } 197 198 struct passwd * 199 pwcopy(struct passwd *pw) 200 { 201 struct passwd *copy = xcalloc(1, sizeof(*copy)); 202 203 copy->pw_name = xstrdup(pw->pw_name); 204 copy->pw_passwd = xstrdup(pw->pw_passwd); 205 copy->pw_gecos = xstrdup(pw->pw_gecos); 206 copy->pw_uid = pw->pw_uid; 207 copy->pw_gid = pw->pw_gid; 208 #ifdef HAVE_PW_EXPIRE_IN_PASSWD 209 copy->pw_expire = pw->pw_expire; 210 #endif 211 #ifdef HAVE_PW_CHANGE_IN_PASSWD 212 copy->pw_change = pw->pw_change; 213 #endif 214 #ifdef HAVE_PW_CLASS_IN_PASSWD 215 copy->pw_class = xstrdup(pw->pw_class); 216 #endif 217 copy->pw_dir = xstrdup(pw->pw_dir); 218 copy->pw_shell = xstrdup(pw->pw_shell); 219 return copy; 220 } 221 222 /* 223 * Convert ASCII string to TCP/IP port number. 224 * Port must be >=0 and <=65535. 225 * Return -1 if invalid. 226 */ 227 int 228 a2port(const char *s) 229 { 230 long long port; 231 const char *errstr; 232 233 port = strtonum(s, 0, 65535, &errstr); 234 if (errstr != NULL) 235 return -1; 236 return (int)port; 237 } 238 239 int 240 a2tun(const char *s, int *remote) 241 { 242 const char *errstr = NULL; 243 char *sp, *ep; 244 int tun; 245 246 if (remote != NULL) { 247 *remote = SSH_TUNID_ANY; 248 sp = xstrdup(s); 249 if ((ep = strchr(sp, ':')) == NULL) { 250 xfree(sp); 251 return (a2tun(s, NULL)); 252 } 253 ep[0] = '\0'; ep++; 254 *remote = a2tun(ep, NULL); 255 tun = a2tun(sp, NULL); 256 xfree(sp); 257 return (*remote == SSH_TUNID_ERR ? *remote : tun); 258 } 259 260 if (strcasecmp(s, "any") == 0) 261 return (SSH_TUNID_ANY); 262 263 tun = strtonum(s, 0, SSH_TUNID_MAX, &errstr); 264 if (errstr != NULL) 265 return (SSH_TUNID_ERR); 266 267 return (tun); 268 } 269 270 #define SECONDS 1 271 #define MINUTES (SECONDS * 60) 272 #define HOURS (MINUTES * 60) 273 #define DAYS (HOURS * 24) 274 #define WEEKS (DAYS * 7) 275 276 /* 277 * Convert a time string into seconds; format is 278 * a sequence of: 279 * time[qualifier] 280 * 281 * Valid time qualifiers are: 282 * <none> seconds 283 * s|S seconds 284 * m|M minutes 285 * h|H hours 286 * d|D days 287 * w|W weeks 288 * 289 * Examples: 290 * 90m 90 minutes 291 * 1h30m 90 minutes 292 * 2d 2 days 293 * 1w 1 week 294 * 295 * Return -1 if time string is invalid. 296 */ 297 long 298 convtime(const char *s) 299 { 300 long total, secs; 301 const char *p; 302 char *endp; 303 304 errno = 0; 305 total = 0; 306 p = s; 307 308 if (p == NULL || *p == '\0') 309 return -1; 310 311 while (*p) { 312 secs = strtol(p, &endp, 10); 313 if (p == endp || 314 (errno == ERANGE && (secs == LONG_MIN || secs == LONG_MAX)) || 315 secs < 0) 316 return -1; 317 318 switch (*endp++) { 319 case '\0': 320 endp--; 321 break; 322 case 's': 323 case 'S': 324 break; 325 case 'm': 326 case 'M': 327 secs *= MINUTES; 328 break; 329 case 'h': 330 case 'H': 331 secs *= HOURS; 332 break; 333 case 'd': 334 case 'D': 335 secs *= DAYS; 336 break; 337 case 'w': 338 case 'W': 339 secs *= WEEKS; 340 break; 341 default: 342 return -1; 343 } 344 total += secs; 345 if (total < 0) 346 return -1; 347 p = endp; 348 } 349 350 return total; 351 } 352 353 /* 354 * Returns a standardized host+port identifier string. 355 * Caller must free returned string. 356 */ 357 char * 358 put_host_port(const char *host, u_short port) 359 { 360 char *hoststr; 361 362 if (port == 0 || port == SSH_DEFAULT_PORT) 363 return(xstrdup(host)); 364 if (asprintf(&hoststr, "[%s]:%d", host, (int)port) < 0) 365 fatal("put_host_port: asprintf: %s", strerror(errno)); 366 debug3("put_host_port: %s", hoststr); 367 return hoststr; 368 } 369 370 /* 371 * Search for next delimiter between hostnames/addresses and ports. 372 * Argument may be modified (for termination). 373 * Returns *cp if parsing succeeds. 374 * *cp is set to the start of the next delimiter, if one was found. 375 * If this is the last field, *cp is set to NULL. 376 */ 377 char * 378 hpdelim(char **cp) 379 { 380 char *s, *old; 381 382 if (cp == NULL || *cp == NULL) 383 return NULL; 384 385 old = s = *cp; 386 if (*s == '[') { 387 if ((s = strchr(s, ']')) == NULL) 388 return NULL; 389 else 390 s++; 391 } else if ((s = strpbrk(s, ":/")) == NULL) 392 s = *cp + strlen(*cp); /* skip to end (see first case below) */ 393 394 switch (*s) { 395 case '\0': 396 *cp = NULL; /* no more fields*/ 397 break; 398 399 case ':': 400 case '/': 401 *s = '\0'; /* terminate */ 402 *cp = s + 1; 403 break; 404 405 default: 406 return NULL; 407 } 408 409 return old; 410 } 411 412 char * 413 cleanhostname(char *host) 414 { 415 if (*host == '[' && host[strlen(host) - 1] == ']') { 416 host[strlen(host) - 1] = '\0'; 417 return (host + 1); 418 } else 419 return host; 420 } 421 422 char * 423 colon(char *cp) 424 { 425 int flag = 0; 426 427 if (*cp == ':') /* Leading colon is part of file name. */ 428 return (0); 429 if (*cp == '[') 430 flag = 1; 431 432 for (; *cp; ++cp) { 433 if (*cp == '@' && *(cp+1) == '[') 434 flag = 1; 435 if (*cp == ']' && *(cp+1) == ':' && flag) 436 return (cp+1); 437 if (*cp == ':' && !flag) 438 return (cp); 439 if (*cp == '/') 440 return (0); 441 } 442 return (0); 443 } 444 445 /* function to assist building execv() arguments */ 446 void 447 addargs(arglist *args, char *fmt, ...) 448 { 449 va_list ap; 450 char *cp; 451 u_int nalloc; 452 int r; 453 454 va_start(ap, fmt); 455 r = vasprintf(&cp, fmt, ap); 456 va_end(ap); 457 if (r == -1) 458 fatal("addargs: argument too long"); 459 460 nalloc = args->nalloc; 461 if (args->list == NULL) { 462 nalloc = 32; 463 args->num = 0; 464 } else if (args->num+2 >= nalloc) 465 nalloc *= 2; 466 467 args->list = xrealloc(args->list, nalloc, sizeof(char *)); 468 args->nalloc = nalloc; 469 args->list[args->num++] = cp; 470 args->list[args->num] = NULL; 471 } 472 473 void 474 replacearg(arglist *args, u_int which, char *fmt, ...) 475 { 476 va_list ap; 477 char *cp; 478 int r; 479 480 va_start(ap, fmt); 481 r = vasprintf(&cp, fmt, ap); 482 va_end(ap); 483 if (r == -1) 484 fatal("replacearg: argument too long"); 485 486 if (which >= args->num) 487 fatal("replacearg: tried to replace invalid arg %d >= %d", 488 which, args->num); 489 xfree(args->list[which]); 490 args->list[which] = cp; 491 } 492 493 void 494 freeargs(arglist *args) 495 { 496 u_int i; 497 498 if (args->list != NULL) { 499 for (i = 0; i < args->num; i++) 500 xfree(args->list[i]); 501 xfree(args->list); 502 args->nalloc = args->num = 0; 503 args->list = NULL; 504 } 505 } 506 507 /* 508 * Expands tildes in the file name. Returns data allocated by xmalloc. 509 * Warning: this calls getpw*. 510 */ 511 char * 512 tilde_expand_filename(const char *filename, uid_t uid) 513 { 514 const char *path; 515 char user[128], ret[MAXPATHLEN]; 516 struct passwd *pw; 517 u_int len, slash; 518 519 if (*filename != '~') 520 return (xstrdup(filename)); 521 filename++; 522 523 path = strchr(filename, '/'); 524 if (path != NULL && path > filename) { /* ~user/path */ 525 slash = path - filename; 526 if (slash > sizeof(user) - 1) 527 fatal("tilde_expand_filename: ~username too long"); 528 memcpy(user, filename, slash); 529 user[slash] = '\0'; 530 if ((pw = getpwnam(user)) == NULL) 531 fatal("tilde_expand_filename: No such user %s", user); 532 } else if ((pw = getpwuid(uid)) == NULL) /* ~/path */ 533 fatal("tilde_expand_filename: No such uid %ld", (long)uid); 534 535 if (strlcpy(ret, pw->pw_dir, sizeof(ret)) >= sizeof(ret)) 536 fatal("tilde_expand_filename: Path too long"); 537 538 /* Make sure directory has a trailing '/' */ 539 len = strlen(pw->pw_dir); 540 if ((len == 0 || pw->pw_dir[len - 1] != '/') && 541 strlcat(ret, "/", sizeof(ret)) >= sizeof(ret)) 542 fatal("tilde_expand_filename: Path too long"); 543 544 /* Skip leading '/' from specified path */ 545 if (path != NULL) 546 filename = path + 1; 547 if (strlcat(ret, filename, sizeof(ret)) >= sizeof(ret)) 548 fatal("tilde_expand_filename: Path too long"); 549 550 return (xstrdup(ret)); 551 } 552 553 /* 554 * Expand a string with a set of %[char] escapes. A number of escapes may be 555 * specified as (char *escape_chars, char *replacement) pairs. The list must 556 * be terminated by a NULL escape_char. Returns replaced string in memory 557 * allocated by xmalloc. 558 */ 559 char * 560 percent_expand(const char *string, ...) 561 { 562 #define EXPAND_MAX_KEYS 16 563 struct { 564 const char *key; 565 const char *repl; 566 } keys[EXPAND_MAX_KEYS]; 567 u_int num_keys, i, j; 568 char buf[4096]; 569 va_list ap; 570 571 /* Gather keys */ 572 va_start(ap, string); 573 for (num_keys = 0; num_keys < EXPAND_MAX_KEYS; num_keys++) { 574 keys[num_keys].key = va_arg(ap, char *); 575 if (keys[num_keys].key == NULL) 576 break; 577 keys[num_keys].repl = va_arg(ap, char *); 578 if (keys[num_keys].repl == NULL) 579 fatal("percent_expand: NULL replacement"); 580 } 581 va_end(ap); 582 583 if (num_keys >= EXPAND_MAX_KEYS) 584 fatal("percent_expand: too many keys"); 585 586 /* Expand string */ 587 *buf = '\0'; 588 for (i = 0; *string != '\0'; string++) { 589 if (*string != '%') { 590 append: 591 buf[i++] = *string; 592 if (i >= sizeof(buf)) 593 fatal("percent_expand: string too long"); 594 buf[i] = '\0'; 595 continue; 596 } 597 string++; 598 if (*string == '%') 599 goto append; 600 for (j = 0; j < num_keys; j++) { 601 if (strchr(keys[j].key, *string) != NULL) { 602 i = strlcat(buf, keys[j].repl, sizeof(buf)); 603 if (i >= sizeof(buf)) 604 fatal("percent_expand: string too long"); 605 break; 606 } 607 } 608 if (j >= num_keys) 609 fatal("percent_expand: unknown key %%%c", *string); 610 } 611 return (xstrdup(buf)); 612 #undef EXPAND_MAX_KEYS 613 } 614 615 /* 616 * Read an entire line from a public key file into a static buffer, discarding 617 * lines that exceed the buffer size. Returns 0 on success, -1 on failure. 618 */ 619 int 620 read_keyfile_line(FILE *f, const char *filename, char *buf, size_t bufsz, 621 u_long *lineno) 622 { 623 while (fgets(buf, bufsz, f) != NULL) { 624 if (buf[0] == '\0') 625 continue; 626 (*lineno)++; 627 if (buf[strlen(buf) - 1] == '\n' || feof(f)) { 628 return 0; 629 } else { 630 debug("%s: %s line %lu exceeds size limit", __func__, 631 filename, *lineno); 632 /* discard remainder of line */ 633 while (fgetc(f) != '\n' && !feof(f)) 634 ; /* nothing */ 635 } 636 } 637 return -1; 638 } 639 640 int 641 tun_open(int tun, int mode) 642 { 643 #if defined(CUSTOM_SYS_TUN_OPEN) 644 return (sys_tun_open(tun, mode)); 645 #elif defined(SSH_TUN_OPENBSD) 646 struct ifreq ifr; 647 char name[100]; 648 int fd = -1, sock; 649 650 /* Open the tunnel device */ 651 if (tun <= SSH_TUNID_MAX) { 652 snprintf(name, sizeof(name), "/dev/tun%d", tun); 653 fd = open(name, O_RDWR); 654 } else if (tun == SSH_TUNID_ANY) { 655 for (tun = 100; tun >= 0; tun--) { 656 snprintf(name, sizeof(name), "/dev/tun%d", tun); 657 if ((fd = open(name, O_RDWR)) >= 0) 658 break; 659 } 660 } else { 661 debug("%s: invalid tunnel %u", __func__, tun); 662 return (-1); 663 } 664 665 if (fd < 0) { 666 debug("%s: %s open failed: %s", __func__, name, strerror(errno)); 667 return (-1); 668 } 669 670 debug("%s: %s mode %d fd %d", __func__, name, mode, fd); 671 672 /* Set the tunnel device operation mode */ 673 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tun%d", tun); 674 if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) == -1) 675 goto failed; 676 677 if (ioctl(sock, SIOCGIFFLAGS, &ifr) == -1) 678 goto failed; 679 680 /* Set interface mode */ 681 ifr.ifr_flags &= ~IFF_UP; 682 if (mode == SSH_TUNMODE_ETHERNET) 683 ifr.ifr_flags |= IFF_LINK0; 684 else 685 ifr.ifr_flags &= ~IFF_LINK0; 686 if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1) 687 goto failed; 688 689 /* Bring interface up */ 690 ifr.ifr_flags |= IFF_UP; 691 if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1) 692 goto failed; 693 694 close(sock); 695 return (fd); 696 697 failed: 698 if (fd >= 0) 699 close(fd); 700 if (sock >= 0) 701 close(sock); 702 debug("%s: failed to set %s mode %d: %s", __func__, name, 703 mode, strerror(errno)); 704 return (-1); 705 #else 706 error("Tunnel interfaces are not supported on this platform"); 707 return (-1); 708 #endif 709 } 710 711 void 712 sanitise_stdfd(void) 713 { 714 int nullfd, dupfd; 715 716 if ((nullfd = dupfd = open(_PATH_DEVNULL, O_RDWR)) == -1) { 717 fprintf(stderr, "Couldn't open /dev/null: %s\n", 718 strerror(errno)); 719 exit(1); 720 } 721 while (++dupfd <= 2) { 722 /* Only clobber closed fds */ 723 if (fcntl(dupfd, F_GETFL, 0) >= 0) 724 continue; 725 if (dup2(nullfd, dupfd) == -1) { 726 fprintf(stderr, "dup2: %s\n", strerror(errno)); 727 exit(1); 728 } 729 } 730 if (nullfd > 2) 731 close(nullfd); 732 } 733 734 char * 735 tohex(const void *vp, size_t l) 736 { 737 const u_char *p = (const u_char *)vp; 738 char b[3], *r; 739 size_t i, hl; 740 741 if (l > 65536) 742 return xstrdup("tohex: length > 65536"); 743 744 hl = l * 2 + 1; 745 r = xcalloc(1, hl); 746 for (i = 0; i < l; i++) { 747 snprintf(b, sizeof(b), "%02x", p[i]); 748 strlcat(r, b, hl); 749 } 750 return (r); 751 } 752 753 u_int64_t 754 get_u64(const void *vp) 755 { 756 const u_char *p = (const u_char *)vp; 757 u_int64_t v; 758 759 v = (u_int64_t)p[0] << 56; 760 v |= (u_int64_t)p[1] << 48; 761 v |= (u_int64_t)p[2] << 40; 762 v |= (u_int64_t)p[3] << 32; 763 v |= (u_int64_t)p[4] << 24; 764 v |= (u_int64_t)p[5] << 16; 765 v |= (u_int64_t)p[6] << 8; 766 v |= (u_int64_t)p[7]; 767 768 return (v); 769 } 770 771 u_int32_t 772 get_u32(const void *vp) 773 { 774 const u_char *p = (const u_char *)vp; 775 u_int32_t v; 776 777 v = (u_int32_t)p[0] << 24; 778 v |= (u_int32_t)p[1] << 16; 779 v |= (u_int32_t)p[2] << 8; 780 v |= (u_int32_t)p[3]; 781 782 return (v); 783 } 784 785 u_int16_t 786 get_u16(const void *vp) 787 { 788 const u_char *p = (const u_char *)vp; 789 u_int16_t v; 790 791 v = (u_int16_t)p[0] << 8; 792 v |= (u_int16_t)p[1]; 793 794 return (v); 795 } 796 797 void 798 put_u64(void *vp, u_int64_t v) 799 { 800 u_char *p = (u_char *)vp; 801 802 p[0] = (u_char)(v >> 56) & 0xff; 803 p[1] = (u_char)(v >> 48) & 0xff; 804 p[2] = (u_char)(v >> 40) & 0xff; 805 p[3] = (u_char)(v >> 32) & 0xff; 806 p[4] = (u_char)(v >> 24) & 0xff; 807 p[5] = (u_char)(v >> 16) & 0xff; 808 p[6] = (u_char)(v >> 8) & 0xff; 809 p[7] = (u_char)v & 0xff; 810 } 811 812 void 813 put_u32(void *vp, u_int32_t v) 814 { 815 u_char *p = (u_char *)vp; 816 817 p[0] = (u_char)(v >> 24) & 0xff; 818 p[1] = (u_char)(v >> 16) & 0xff; 819 p[2] = (u_char)(v >> 8) & 0xff; 820 p[3] = (u_char)v & 0xff; 821 } 822 823 824 void 825 put_u16(void *vp, u_int16_t v) 826 { 827 u_char *p = (u_char *)vp; 828 829 p[0] = (u_char)(v >> 8) & 0xff; 830 p[1] = (u_char)v & 0xff; 831 } 832 833 void 834 ms_subtract_diff(struct timeval *start, int *ms) 835 { 836 struct timeval diff, finish; 837 838 gettimeofday(&finish, NULL); 839 timersub(&finish, start, &diff); 840 *ms -= (diff.tv_sec * 1000) + (diff.tv_usec / 1000); 841 } 842 843 void 844 ms_to_timeval(struct timeval *tv, int ms) 845 { 846 if (ms < 0) 847 ms = 0; 848 tv->tv_sec = ms / 1000; 849 tv->tv_usec = (ms % 1000) * 1000; 850 } 851 852