misc.c

   1 /* $OpenBSD: misc.c,v 1.52 2006/03/30 09:58:15 djm 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/ioctl.h>
  30 #include <netinet/tcp.h>
  31 #ifdef HAVE_PATHS_H
  32 # include <paths.h>
  33 #endif
  34 #ifdef SSH_TUN_OPENBSD
  35 #include <net/if.h>
  36 #endif
  37
  38 #include "misc.h"
  39 #include "log.h"
  40 #include "xmalloc.h"
  41
  42 /* remove newline at end of string */
  43 char *
  44 chop(char *s)
  45 {
  46         char *t = s;
  47         while (*t) {
  48                 if (*t == '\n' || *t == '\r') {
  49                         *t = '\0';
  50                         return s;
  51                 }
  52                 t++;
  53         }
  54         return s;
  55
  56 }
  57
  58 /* set/unset filedescriptor to non-blocking */
  59 int
  60 set_nonblock(int fd)
  61 {
  62         int val;
  63
  64         val = fcntl(fd, F_GETFL, 0);
  65         if (val < 0) {
  66                 error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno));
  67                 return (-1);
  68         }
  69         if (val & O_NONBLOCK) {
  70                 debug3("fd %d is O_NONBLOCK", fd);
  71                 return (0);
  72         }
  73         debug2("fd %d setting O_NONBLOCK", fd);
  74         val |= O_NONBLOCK;
  75         if (fcntl(fd, F_SETFL, val) == -1) {
  76                 debug("fcntl(%d, F_SETFL, O_NONBLOCK): %s", fd,
  77                     strerror(errno));
  78                 return (-1);
  79         }
  80         return (0);
  81 }
  82
  83 int
  84 unset_nonblock(int fd)
  85 {
  86         int val;
  87
  88         val = fcntl(fd, F_GETFL, 0);
  89         if (val < 0) {
  90                 error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno));
  91                 return (-1);
  92         }
  93         if (!(val & O_NONBLOCK)) {
  94                 debug3("fd %d is not O_NONBLOCK", fd);
  95                 return (0);
  96         }
  97         debug("fd %d clearing O_NONBLOCK", fd);
  98         val &= ~O_NONBLOCK;
  99         if (fcntl(fd, F_SETFL, val) == -1) {
 100                 debug("fcntl(%d, F_SETFL, ~O_NONBLOCK): %s",
 101                     fd, strerror(errno));
 102                 return (-1);
 103         }
 104         return (0);
 105 }
 106
 107 /* disable nagle on socket */
 108 void
 109 set_nodelay(int fd)
 110 {
 111         int opt;
 112         socklen_t optlen;
 113
 114         optlen = sizeof opt;
 115         if (getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, &optlen) == -1) {
 116                 debug("getsockopt TCP_NODELAY: %.100s", strerror(errno));
 117                 return;
 118         }
 119         if (opt == 1) {
 120                 debug2("fd %d is TCP_NODELAY", fd);
 121                 return;
 122         }
 123         opt = 1;
 124         debug2("fd %d setting TCP_NODELAY", fd);
 125         if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof opt) == -1)
 126                 error("setsockopt TCP_NODELAY: %.100s", strerror(errno));
 127 }
 128
 129 /* Characters considered whitespace in strsep calls. */
 130 #define WHITESPACE " \t\r\n"
 131 #define QUOTE   "\""
 132
 133 /* return next token in configuration line */
 134 char *
 135 strdelim(char **s)
 136 {
 137         char *old;
 138         int wspace = 0;
 139
 140         if (*s == NULL)
 141                 return NULL;
 142
 143         old = *s;
 144
 145         *s = strpbrk(*s, WHITESPACE QUOTE "=");
 146         if (*s == NULL)
 147                 return (old);
 148
 149         if (*s[0] == '\"') {
 150                 memmove(*s, *s + 1, strlen(*s)); /* move nul too */
 151                 /* Find matching quote */
 152                 if ((*s = strpbrk(*s, QUOTE)) == NULL) {
 153                         return (NULL);          /* no matching quote */
 154                 } else {
 155                         *s[0] = '\0';
 156                         return (old);
 157                 }
 158         }
 159
 160         /* Allow only one '=' to be skipped */
 161         if (*s[0] == '=')
 162                 wspace = 1;
 163         *s[0] = '\0';
 164
 165         /* Skip any extra whitespace after first token */
 166         *s += strspn(*s + 1, WHITESPACE) + 1;
 167         if (*s[0] == '=' && !wspace)
 168                 *s += strspn(*s + 1, WHITESPACE) + 1;
 169
 170         return (old);
 171 }
 172
 173 struct passwd *
 174 pwcopy(struct passwd *pw)
 175 {
 176         struct passwd *copy = xcalloc(1, sizeof(*copy));
 177
 178         copy->pw_name = xstrdup(pw->pw_name);
 179         copy->pw_passwd = xstrdup(pw->pw_passwd);
 180         copy->pw_gecos = xstrdup(pw->pw_gecos);
 181         copy->pw_uid = pw->pw_uid;
 182         copy->pw_gid = pw->pw_gid;
 183 #ifdef HAVE_PW_EXPIRE_IN_PASSWD
 184         copy->pw_expire = pw->pw_expire;
 185 #endif
 186 #ifdef HAVE_PW_CHANGE_IN_PASSWD
 187         copy->pw_change = pw->pw_change;
 188 #endif
 189 #ifdef HAVE_PW_CLASS_IN_PASSWD
 190         copy->pw_class = xstrdup(pw->pw_class);
 191 #endif
 192         copy->pw_dir = xstrdup(pw->pw_dir);
 193         copy->pw_shell = xstrdup(pw->pw_shell);
 194         return copy;
 195 }
 196
 197 /*
 198  * Convert ASCII string to TCP/IP port number.
 199  * Port must be >0 and <=65535.
 200  * Return 0 if invalid.
 201  */
 202 int
 203 a2port(const char *s)
 204 {
 205         long port;
 206         char *endp;
 207
 208         errno = 0;
 209         port = strtol(s, &endp, 0);
 210         if (s == endp || *endp != '\0' ||
 211             (errno == ERANGE && (port == LONG_MIN || port == LONG_MAX)) ||
 212             port <= 0 || port > 65535)
 213                 return 0;
 214
 215         return port;
 216 }
 217
 218 int
 219 a2tun(const char *s, int *remote)
 220 {
 221         const char *errstr = NULL;
 222         char *sp, *ep;
 223         int tun;
 224
 225         if (remote != NULL) {
 226                 *remote = SSH_TUNID_ANY;
 227                 sp = xstrdup(s);
 228                 if ((ep = strchr(sp, ':')) == NULL) {
 229                         xfree(sp);
 230                         return (a2tun(s, NULL));
 231                 }
 232                 ep[0] = '\0'; ep++;
 233                 *remote = a2tun(ep, NULL);
 234                 tun = a2tun(sp, NULL);
 235                 xfree(sp);
 236                 return (*remote == SSH_TUNID_ERR ? *remote : tun);
 237         }
 238
 239         if (strcasecmp(s, "any") == 0)
 240                 return (SSH_TUNID_ANY);
 241
 242         tun = strtonum(s, 0, SSH_TUNID_MAX, &errstr);
 243         if (errstr != NULL)
 244                 return (SSH_TUNID_ERR);
 245
 246         return (tun);
 247 }
 248
 249 #define SECONDS         1
 250 #define MINUTES         (SECONDS * 60)
 251 #define HOURS           (MINUTES * 60)
 252 #define DAYS            (HOURS * 24)
 253 #define WEEKS           (DAYS * 7)
 254
 255 /*
 256  * Convert a time string into seconds; format is
 257  * a sequence of:
 258  *      time[qualifier]
 259  *
 260  * Valid time qualifiers are:
 261  *      <none>  seconds
 262  *      s|S     seconds
 263  *      m|M     minutes
 264  *      h|H     hours
 265  *      d|D     days
 266  *      w|W     weeks
 267  *
 268  * Examples:
 269  *      90m     90 minutes
 270  *      1h30m   90 minutes
 271  *      2d      2 days
 272  *      1w      1 week
 273  *
 274  * Return -1 if time string is invalid.
 275  */
 276 long
 277 convtime(const char *s)
 278 {
 279         long total, secs;
 280         const char *p;
 281         char *endp;
 282
 283         errno = 0;
 284         total = 0;
 285         p = s;
 286
 287         if (p == NULL || *p == '\0')
 288                 return -1;
 289
 290         while (*p) {
 291                 secs = strtol(p, &endp, 10);
 292                 if (p == endp ||
 293                     (errno == ERANGE && (secs == LONG_MIN || secs == LONG_MAX)) ||
 294                     secs < 0)
 295                         return -1;
 296
 297                 switch (*endp++) {
 298                 case '\0':
 299                         endp--;
 300                         break;
 301                 case 's':
 302                 case 'S':
 303                         break;
 304                 case 'm':
 305                 case 'M':
 306                         secs *= MINUTES;
 307                         break;
 308                 case 'h':
 309                 case 'H':
 310                         secs *= HOURS;
 311                         break;
 312                 case 'd':
 313                 case 'D':
 314                         secs *= DAYS;
 315                         break;
 316                 case 'w':
 317                 case 'W':
 318                         secs *= WEEKS;
 319                         break;
 320                 default:
 321                         return -1;
 322                 }
 323                 total += secs;
 324                 if (total < 0)
 325                         return -1;
 326                 p = endp;
 327         }
 328
 329         return total;
 330 }
 331
 332 /*
 333  * Search for next delimiter between hostnames/addresses and ports.
 334  * Argument may be modified (for termination).
 335  * Returns *cp if parsing succeeds.
 336  * *cp is set to the start of the next delimiter, if one was found.
 337  * If this is the last field, *cp is set to NULL.
 338  */
 339 char *
 340 hpdelim(char **cp)
 341 {
 342         char *s, *old;
 343
 344         if (cp == NULL || *cp == NULL)
 345                 return NULL;
 346
 347         old = s = *cp;
 348         if (*s == '[') {
 349                 if ((s = strchr(s, ']')) == NULL)
 350                         return NULL;
 351                 else
 352                         s++;
 353         } else if ((s = strpbrk(s, ":/")) == NULL)
 354                 s = *cp + strlen(*cp); /* skip to end (see first case below) */
 355
 356         switch (*s) {
 357         case '\0':
 358                 *cp = NULL;     /* no more fields*/
 359                 break;
 360
 361         case ':':
 362         case '/':
 363                 *s = '\0';      /* terminate */
 364                 *cp = s + 1;
 365                 break;
 366
 367         default:
 368                 return NULL;
 369         }
 370
 371         return old;
 372 }
 373
 374 char *
 375 cleanhostname(char *host)
 376 {
 377         if (*host == '[' && host[strlen(host) - 1] == ']') {
 378                 host[strlen(host) - 1] = '\0';
 379                 return (host + 1);
 380         } else
 381                 return host;
 382 }
 383
 384 char *
 385 colon(char *cp)
 386 {
 387         int flag = 0;
 388
 389         if (*cp == ':')         /* Leading colon is part of file name. */
 390                 return (0);
 391         if (*cp == '[')
 392                 flag = 1;
 393
 394         for (; *cp; ++cp) {
 395                 if (*cp == '@' && *(cp+1) == '[')
 396                         flag = 1;
 397                 if (*cp == ']' && *(cp+1) == ':' && flag)
 398                         return (cp+1);
 399                 if (*cp == ':' && !flag)
 400                         return (cp);
 401                 if (*cp == '/')
 402                         return (0);
 403         }
 404         return (0);
 405 }
 406
 407 /* function to assist building execv() arguments */
 408 void
 409 addargs(arglist *args, char *fmt, ...)
 410 {
 411         va_list ap;
 412         char *cp;
 413         u_int nalloc;
 414         int r;
 415
 416         va_start(ap, fmt);
 417         r = vasprintf(&cp, fmt, ap);
 418         va_end(ap);
 419         if (r == -1)
 420                 fatal("addargs: argument too long");
 421
 422         nalloc = args->nalloc;
 423         if (args->list == NULL) {
 424                 nalloc = 32;
 425                 args->num = 0;
 426         } else if (args->num+2 >= nalloc)
 427                 nalloc *= 2;
 428
 429         args->list = xrealloc(args->list, nalloc, sizeof(char *));
 430         args->nalloc = nalloc;
 431         args->list[args->num++] = cp;
 432         args->list[args->num] = NULL;
 433 }
 434
 435 void
 436 replacearg(arglist *args, u_int which, char *fmt, ...)
 437 {
 438         va_list ap;
 439         char *cp;
 440         int r;
 441
 442         va_start(ap, fmt);
 443         r = vasprintf(&cp, fmt, ap);
 444         va_end(ap);
 445         if (r == -1)
 446                 fatal("replacearg: argument too long");
 447
 448         if (which >= args->num)
 449                 fatal("replacearg: tried to replace invalid arg %d >= %d",
 450                     which, args->num);
 451         xfree(args->list[which]);
 452         args->list[which] = cp;
 453 }
 454
 455 void
 456 freeargs(arglist *args)
 457 {
 458         u_int i;
 459
 460         if (args->list != NULL) {
 461                 for (i = 0; i < args->num; i++)
 462                         xfree(args->list[i]);
 463                 xfree(args->list);
 464                 args->nalloc = args->num = 0;
 465                 args->list = NULL;
 466         }
 467 }
 468
 469 /*
 470  * Expands tildes in the file name.  Returns data allocated by xmalloc.
 471  * Warning: this calls getpw*.
 472  */
 473 char *
 474 tilde_expand_filename(const char *filename, uid_t uid)
 475 {
 476         const char *path;
 477         char user[128], ret[MAXPATHLEN];
 478         struct passwd *pw;
 479         u_int len, slash;
 480
 481         if (*filename != '~')
 482                 return (xstrdup(filename));
 483         filename++;
 484
 485         path = strchr(filename, '/');
 486         if (path != NULL && path > filename) {          /* ~user/path */
 487                 slash = path - filename;
 488                 if (slash > sizeof(user) - 1)
 489                         fatal("tilde_expand_filename: ~username too long");
 490                 memcpy(user, filename, slash);
 491                 user[slash] = '\0';
 492                 if ((pw = getpwnam(user)) == NULL)
 493                         fatal("tilde_expand_filename: No such user %s", user);
 494         } else if ((pw = getpwuid(uid)) == NULL)        /* ~/path */
 495                 fatal("tilde_expand_filename: No such uid %d", uid);
 496
 497         if (strlcpy(ret, pw->pw_dir, sizeof(ret)) >= sizeof(ret))
 498                 fatal("tilde_expand_filename: Path too long");
 499
 500         /* Make sure directory has a trailing '/' */
 501         len = strlen(pw->pw_dir);
 502         if ((len == 0 || pw->pw_dir[len - 1] != '/') &&
 503             strlcat(ret, "/", sizeof(ret)) >= sizeof(ret))
 504                 fatal("tilde_expand_filename: Path too long");
 505
 506         /* Skip leading '/' from specified path */
 507         if (path != NULL)
 508                 filename = path + 1;
 509         if (strlcat(ret, filename, sizeof(ret)) >= sizeof(ret))
 510                 fatal("tilde_expand_filename: Path too long");
 511
 512         return (xstrdup(ret));
 513 }
 514
 515 /*
 516  * Expand a string with a set of %[char] escapes. A number of escapes may be
 517  * specified as (char *escape_chars, char *replacement) pairs. The list must
 518  * be terminated by a NULL escape_char. Returns replaced string in memory
 519  * allocated by xmalloc.
 520  */
 521 char *
 522 percent_expand(const char *string, ...)
 523 {
 524 #define EXPAND_MAX_KEYS 16
 525         struct {
 526                 const char *key;
 527                 const char *repl;
 528         } keys[EXPAND_MAX_KEYS];
 529         u_int num_keys, i, j;
 530         char buf[4096];
 531         va_list ap;
 532
 533         /* Gather keys */
 534         va_start(ap, string);
 535         for (num_keys = 0; num_keys < EXPAND_MAX_KEYS; num_keys++) {
 536                 keys[num_keys].key = va_arg(ap, char *);
 537                 if (keys[num_keys].key == NULL)
 538                         break;
 539                 keys[num_keys].repl = va_arg(ap, char *);
 540                 if (keys[num_keys].repl == NULL)
 541                         fatal("percent_expand: NULL replacement");
 542         }
 543         va_end(ap);
 544
 545         if (num_keys >= EXPAND_MAX_KEYS)
 546                 fatal("percent_expand: too many keys");
 547
 548         /* Expand string */
 549         *buf = '\0';
 550         for (i = 0; *string != '\0'; string++) {
 551                 if (*string != '%') {
 552  append:
 553                         buf[i++] = *string;
 554                         if (i >= sizeof(buf))
 555                                 fatal("percent_expand: string too long");
 556                         buf[i] = '\0';
 557                         continue;
 558                 }
 559                 string++;
 560                 if (*string == '%')
 561                         goto append;
 562                 for (j = 0; j < num_keys; j++) {
 563                         if (strchr(keys[j].key, *string) != NULL) {
 564                                 i = strlcat(buf, keys[j].repl, sizeof(buf));
 565                                 if (i >= sizeof(buf))
 566                                         fatal("percent_expand: string too long");
 567                                 break;
 568                         }
 569                 }
 570                 if (j >= num_keys)
 571                         fatal("percent_expand: unknown key %%%c", *string);
 572         }
 573         return (xstrdup(buf));
 574 #undef EXPAND_MAX_KEYS
 575 }
 576
 577 /*
 578  * Read an entire line from a public key file into a static buffer, discarding
 579  * lines that exceed the buffer size.  Returns 0 on success, -1 on failure.
 580  */
 581 int
 582 read_keyfile_line(FILE *f, const char *filename, char *buf, size_t bufsz,
 583    u_long *lineno)
 584 {
 585         while (fgets(buf, bufsz, f) != NULL) {
 586                 (*lineno)++;
 587                 if (buf[strlen(buf) - 1] == '\n' || feof(f)) {
 588                         return 0;
 589                 } else {
 590                         debug("%s: %s line %lu exceeds size limit", __func__,
 591                             filename, *lineno);
 592                         /* discard remainder of line */
 593                         while (fgetc(f) != '\n' && !feof(f))
 594                                 ;       /* nothing */
 595                 }
 596         }
 597         return -1;
 598 }
 599
 600 int
 601 tun_open(int tun, int mode)
 602 {
 603 #if defined(CUSTOM_SYS_TUN_OPEN)
 604         return (sys_tun_open(tun, mode));
 605 #elif defined(SSH_TUN_OPENBSD)
 606         struct ifreq ifr;
 607         char name[100];
 608         int fd = -1, sock;
 609
 610         /* Open the tunnel device */
 611         if (tun <= SSH_TUNID_MAX) {
 612                 snprintf(name, sizeof(name), "/dev/tun%d", tun);
 613                 fd = open(name, O_RDWR);
 614         } else if (tun == SSH_TUNID_ANY) {
 615                 for (tun = 100; tun >= 0; tun--) {
 616                         snprintf(name, sizeof(name), "/dev/tun%d", tun);
 617                         if ((fd = open(name, O_RDWR)) >= 0)
 618                                 break;
 619                 }
 620         } else {
 621                 debug("%s: invalid tunnel %u", __func__, tun);
 622                 return (-1);
 623         }
 624
 625         if (fd < 0) {
 626                 debug("%s: %s open failed: %s", __func__, name, strerror(errno));
 627                 return (-1);
 628         }
 629
 630         debug("%s: %s mode %d fd %d", __func__, name, mode, fd);
 631
 632         /* Set the tunnel device operation mode */
 633         snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tun%d", tun);
 634         if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) == -1)
 635                 goto failed;
 636
 637         if (ioctl(sock, SIOCGIFFLAGS, &ifr) == -1)
 638                 goto failed;
 639
 640         /* Set interface mode */
 641         ifr.ifr_flags &= ~IFF_UP;
 642         if (mode == SSH_TUNMODE_ETHERNET)
 643                 ifr.ifr_flags |= IFF_LINK0;
 644         else
 645                 ifr.ifr_flags &= ~IFF_LINK0;
 646         if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1)
 647                 goto failed;
 648
 649         /* Bring interface up */
 650         ifr.ifr_flags |= IFF_UP;
 651         if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1)
 652                 goto failed;
 653
 654         close(sock);
 655         return (fd);
 656
 657  failed:
 658         if (fd >= 0)
 659                 close(fd);
 660         if (sock >= 0)
 661                 close(sock);
 662         debug("%s: failed to set %s mode %d: %s", __func__, name,
 663             mode, strerror(errno));
 664         return (-1);
 665 #else
 666         error("Tunnel interfaces are not supported on this platform");
 667         return (-1);
 668 #endif
 669 }
 670
 671 void
 672 sanitise_stdfd(void)
 673 {
 674         int nullfd, dupfd;
 675
 676         if ((nullfd = dupfd = open(_PATH_DEVNULL, O_RDWR)) == -1) {
 677                 fprintf(stderr, "Couldn't open /dev/null: %s", strerror(errno));
 678                 exit(1);
 679         }
 680         while (++dupfd <= 2) {
 681                 /* Only clobber closed fds */
 682                 if (fcntl(dupfd, F_GETFL, 0) >= 0)
 683                         continue;
 684                 if (dup2(nullfd, dupfd) == -1) {
 685                         fprintf(stderr, "dup2: %s", strerror(errno));
 686                         exit(1);
 687                 }
 688         }
 689         if (nullfd > 2)
 690                 close(nullfd);
 691 }
 692
 693 char *
 694 tohex(const void *vp, size_t l)
 695 {
 696         const u_char *p = (const u_char *)vp;
 697         char b[3], *r;
 698         size_t i, hl;
 699
 700         if (l > 65536)
 701                 return xstrdup("tohex: length > 65536");
 702
 703         hl = l * 2 + 1;
 704         r = xcalloc(1, hl);
 705         for (i = 0; i < l; i++) {
 706                 snprintf(b, sizeof(b), "%02x", p[i]);
 707                 strlcat(r, b, hl);
 708         }
 709         return (r);
 710 }
 711
 712 u_int64_t
 713 get_u64(const void *vp)
 714 {
 715         const u_char *p = (const u_char *)vp;
 716         u_int64_t v;
 717
 718         v  = (u_int64_t)p[0] << 56;
 719         v |= (u_int64_t)p[1] << 48;
 720         v |= (u_int64_t)p[2] << 40;
 721         v |= (u_int64_t)p[3] << 32;
 722         v |= (u_int64_t)p[4] << 24;
 723         v |= (u_int64_t)p[5] << 16;
 724         v |= (u_int64_t)p[6] << 8;
 725         v |= (u_int64_t)p[7];
 726
 727         return (v);
 728 }
 729
 730 u_int32_t
 731 get_u32(const void *vp)
 732 {
 733         const u_char *p = (const u_char *)vp;
 734         u_int32_t v;
 735
 736         v  = (u_int32_t)p[0] << 24;
 737         v |= (u_int32_t)p[1] << 16;
 738         v |= (u_int32_t)p[2] << 8;
 739         v |= (u_int32_t)p[3];
 740
 741         return (v);
 742 }
 743
 744 u_int16_t
 745 get_u16(const void *vp)
 746 {
 747         const u_char *p = (const u_char *)vp;
 748         u_int16_t v;
 749
 750         v  = (u_int16_t)p[0] << 8;
 751         v |= (u_int16_t)p[1];
 752
 753         return (v);
 754 }
 755
 756 void
 757 put_u64(void *vp, u_int64_t v)
 758 {
 759         u_char *p = (u_char *)vp;
 760
 761         p[0] = (u_char)(v >> 56) & 0xff;
 762         p[1] = (u_char)(v >> 48) & 0xff;
 763         p[2] = (u_char)(v >> 40) & 0xff;
 764         p[3] = (u_char)(v >> 32) & 0xff;
 765         p[4] = (u_char)(v >> 24) & 0xff;
 766         p[5] = (u_char)(v >> 16) & 0xff;
 767         p[6] = (u_char)(v >> 8) & 0xff;
 768         p[7] = (u_char)v & 0xff;
 769 }
 770
 771 void
 772 put_u32(void *vp, u_int32_t v)
 773 {
 774         u_char *p = (u_char *)vp;
 775
 776         p[0] = (u_char)(v >> 24) & 0xff;
 777         p[1] = (u_char)(v >> 16) & 0xff;
 778         p[2] = (u_char)(v >> 8) & 0xff;
 779         p[3] = (u_char)v & 0xff;
 780 }
 781
 782
 783 void
 784 put_u16(void *vp, u_int16_t v)
 785 {
 786         u_char *p = (u_char *)vp;
 787
 788         p[0] = (u_char)(v >> 8) & 0xff;
 789         p[1] = (u_char)v & 0xff;
 790 }