Annotation of src/usr.bin/ssh/misc.c, Revision 1.68
1.68 ! dtucker 1: /* $OpenBSD: misc.c,v 1.67 2008/01/01 08:47:04 dtucker Exp $ */
1.1 markus 2: /*
3: * Copyright (c) 2000 Markus Friedl. All rights reserved.
1.52 djm 4: * Copyright (c) 2005,2006 Damien Miller. All rights reserved.
1.1 markus 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:
1.64 deraadt 27: #include <sys/types.h>
1.45 stevesk 28: #include <sys/ioctl.h>
1.53 stevesk 29: #include <sys/socket.h>
1.61 stevesk 30: #include <sys/param.h>
1.38 stevesk 31:
32: #include <net/if.h>
1.53 stevesk 33: #include <netinet/in.h>
1.44 stevesk 34: #include <netinet/tcp.h>
1.43 stevesk 35:
1.58 stevesk 36: #include <errno.h>
1.55 stevesk 37: #include <fcntl.h>
1.66 dtucker 38: #include <netdb.h>
1.43 stevesk 39: #include <paths.h>
1.54 stevesk 40: #include <pwd.h>
1.57 stevesk 41: #include <stdarg.h>
1.63 stevesk 42: #include <stdio.h>
1.62 stevesk 43: #include <stdlib.h>
1.60 stevesk 44: #include <string.h>
1.59 stevesk 45: #include <unistd.h>
1.1 markus 46:
1.64 deraadt 47: #include "xmalloc.h"
1.1 markus 48: #include "misc.h"
49: #include "log.h"
1.56 dtucker 50: #include "ssh.h"
1.1 markus 51:
1.12 markus 52: /* remove newline at end of string */
1.1 markus 53: char *
54: chop(char *s)
55: {
56: char *t = s;
57: while (*t) {
1.13 deraadt 58: if (*t == '\n' || *t == '\r') {
1.1 markus 59: *t = '\0';
60: return s;
61: }
62: t++;
63: }
64: return s;
65:
66: }
67:
1.12 markus 68: /* set/unset filedescriptor to non-blocking */
1.24 djm 69: int
1.1 markus 70: set_nonblock(int fd)
71: {
72: int val;
1.8 markus 73:
1.1 markus 74: val = fcntl(fd, F_GETFL, 0);
75: if (val < 0) {
76: error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno));
1.24 djm 77: return (-1);
1.1 markus 78: }
79: if (val & O_NONBLOCK) {
1.24 djm 80: debug3("fd %d is O_NONBLOCK", fd);
81: return (0);
1.1 markus 82: }
1.21 markus 83: debug2("fd %d setting O_NONBLOCK", fd);
1.1 markus 84: val |= O_NONBLOCK;
1.24 djm 85: if (fcntl(fd, F_SETFL, val) == -1) {
86: debug("fcntl(%d, F_SETFL, O_NONBLOCK): %s", fd,
87: strerror(errno));
88: return (-1);
89: }
90: return (0);
1.8 markus 91: }
92:
1.24 djm 93: int
1.8 markus 94: unset_nonblock(int fd)
95: {
96: int val;
97:
98: val = fcntl(fd, F_GETFL, 0);
99: if (val < 0) {
100: error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno));
1.24 djm 101: return (-1);
1.8 markus 102: }
103: if (!(val & O_NONBLOCK)) {
1.24 djm 104: debug3("fd %d is not O_NONBLOCK", fd);
105: return (0);
1.8 markus 106: }
1.10 markus 107: debug("fd %d clearing O_NONBLOCK", fd);
1.8 markus 108: val &= ~O_NONBLOCK;
1.24 djm 109: if (fcntl(fd, F_SETFL, val) == -1) {
110: debug("fcntl(%d, F_SETFL, ~O_NONBLOCK): %s",
1.18 markus 111: fd, strerror(errno));
1.24 djm 112: return (-1);
113: }
114: return (0);
1.66 dtucker 115: }
116:
117: const char *
118: ssh_gai_strerror(int gaierr)
119: {
1.67 dtucker 120: if (gaierr == EAI_SYSTEM)
121: return strerror(errno);
122: return gai_strerror(gaierr);
1.15 stevesk 123: }
124:
125: /* disable nagle on socket */
126: void
127: set_nodelay(int fd)
128: {
1.17 stevesk 129: int opt;
130: socklen_t optlen;
1.15 stevesk 131:
1.16 stevesk 132: optlen = sizeof opt;
133: if (getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, &optlen) == -1) {
1.23 markus 134: debug("getsockopt TCP_NODELAY: %.100s", strerror(errno));
1.16 stevesk 135: return;
136: }
137: if (opt == 1) {
138: debug2("fd %d is TCP_NODELAY", fd);
139: return;
140: }
141: opt = 1;
1.20 markus 142: debug2("fd %d setting TCP_NODELAY", fd);
1.16 stevesk 143: if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof opt) == -1)
1.15 stevesk 144: error("setsockopt TCP_NODELAY: %.100s", strerror(errno));
1.1 markus 145: }
146:
147: /* Characters considered whitespace in strsep calls. */
148: #define WHITESPACE " \t\r\n"
1.46 dtucker 149: #define QUOTE "\""
1.1 markus 150:
1.12 markus 151: /* return next token in configuration line */
1.1 markus 152: char *
153: strdelim(char **s)
154: {
155: char *old;
156: int wspace = 0;
157:
158: if (*s == NULL)
159: return NULL;
160:
161: old = *s;
162:
1.46 dtucker 163: *s = strpbrk(*s, WHITESPACE QUOTE "=");
1.1 markus 164: if (*s == NULL)
165: return (old);
166:
1.46 dtucker 167: if (*s[0] == '\"') {
168: memmove(*s, *s + 1, strlen(*s)); /* move nul too */
169: /* Find matching quote */
170: if ((*s = strpbrk(*s, QUOTE)) == NULL) {
171: return (NULL); /* no matching quote */
172: } else {
173: *s[0] = '\0';
174: return (old);
175: }
176: }
177:
1.1 markus 178: /* Allow only one '=' to be skipped */
179: if (*s[0] == '=')
180: wspace = 1;
181: *s[0] = '\0';
182:
1.46 dtucker 183: /* Skip any extra whitespace after first token */
1.1 markus 184: *s += strspn(*s + 1, WHITESPACE) + 1;
185: if (*s[0] == '=' && !wspace)
186: *s += strspn(*s + 1, WHITESPACE) + 1;
187:
188: return (old);
1.2 markus 189: }
190:
191: struct passwd *
192: pwcopy(struct passwd *pw)
193: {
1.49 djm 194: struct passwd *copy = xcalloc(1, sizeof(*copy));
1.4 deraadt 195:
1.2 markus 196: copy->pw_name = xstrdup(pw->pw_name);
197: copy->pw_passwd = xstrdup(pw->pw_passwd);
1.4 deraadt 198: copy->pw_gecos = xstrdup(pw->pw_gecos);
1.2 markus 199: copy->pw_uid = pw->pw_uid;
200: copy->pw_gid = pw->pw_gid;
1.11 markus 201: copy->pw_expire = pw->pw_expire;
202: copy->pw_change = pw->pw_change;
1.2 markus 203: copy->pw_class = xstrdup(pw->pw_class);
204: copy->pw_dir = xstrdup(pw->pw_dir);
205: copy->pw_shell = xstrdup(pw->pw_shell);
206: return copy;
1.5 stevesk 207: }
208:
1.12 markus 209: /*
210: * Convert ASCII string to TCP/IP port number.
211: * Port must be >0 and <=65535.
212: * Return 0 if invalid.
213: */
214: int
215: a2port(const char *s)
1.5 stevesk 216: {
217: long port;
218: char *endp;
219:
220: errno = 0;
221: port = strtol(s, &endp, 0);
222: if (s == endp || *endp != '\0' ||
223: (errno == ERANGE && (port == LONG_MIN || port == LONG_MAX)) ||
224: port <= 0 || port > 65535)
225: return 0;
226:
227: return port;
1.9 stevesk 228: }
229:
1.36 reyk 230: int
231: a2tun(const char *s, int *remote)
232: {
233: const char *errstr = NULL;
234: char *sp, *ep;
235: int tun;
236:
237: if (remote != NULL) {
1.37 reyk 238: *remote = SSH_TUNID_ANY;
1.36 reyk 239: sp = xstrdup(s);
240: if ((ep = strchr(sp, ':')) == NULL) {
241: xfree(sp);
242: return (a2tun(s, NULL));
243: }
244: ep[0] = '\0'; ep++;
245: *remote = a2tun(ep, NULL);
246: tun = a2tun(sp, NULL);
247: xfree(sp);
1.37 reyk 248: return (*remote == SSH_TUNID_ERR ? *remote : tun);
1.36 reyk 249: }
250:
251: if (strcasecmp(s, "any") == 0)
1.37 reyk 252: return (SSH_TUNID_ANY);
1.36 reyk 253:
1.37 reyk 254: tun = strtonum(s, 0, SSH_TUNID_MAX, &errstr);
255: if (errstr != NULL)
256: return (SSH_TUNID_ERR);
1.36 reyk 257:
258: return (tun);
259: }
260:
1.9 stevesk 261: #define SECONDS 1
262: #define MINUTES (SECONDS * 60)
263: #define HOURS (MINUTES * 60)
264: #define DAYS (HOURS * 24)
265: #define WEEKS (DAYS * 7)
266:
1.12 markus 267: /*
268: * Convert a time string into seconds; format is
269: * a sequence of:
270: * time[qualifier]
271: *
272: * Valid time qualifiers are:
273: * <none> seconds
274: * s|S seconds
275: * m|M minutes
276: * h|H hours
277: * d|D days
278: * w|W weeks
279: *
280: * Examples:
281: * 90m 90 minutes
282: * 1h30m 90 minutes
283: * 2d 2 days
284: * 1w 1 week
285: *
286: * Return -1 if time string is invalid.
287: */
288: long
289: convtime(const char *s)
1.9 stevesk 290: {
291: long total, secs;
292: const char *p;
293: char *endp;
294:
295: errno = 0;
296: total = 0;
297: p = s;
298:
299: if (p == NULL || *p == '\0')
300: return -1;
301:
302: while (*p) {
303: secs = strtol(p, &endp, 10);
304: if (p == endp ||
305: (errno == ERANGE && (secs == LONG_MIN || secs == LONG_MAX)) ||
306: secs < 0)
307: return -1;
308:
309: switch (*endp++) {
310: case '\0':
311: endp--;
1.48 deraadt 312: break;
1.9 stevesk 313: case 's':
314: case 'S':
315: break;
316: case 'm':
317: case 'M':
318: secs *= MINUTES;
319: break;
320: case 'h':
321: case 'H':
322: secs *= HOURS;
323: break;
324: case 'd':
325: case 'D':
326: secs *= DAYS;
327: break;
328: case 'w':
329: case 'W':
330: secs *= WEEKS;
331: break;
332: default:
333: return -1;
334: }
335: total += secs;
336: if (total < 0)
337: return -1;
338: p = endp;
339: }
340:
341: return total;
1.56 dtucker 342: }
343:
344: /*
345: * Returns a standardized host+port identifier string.
346: * Caller must free returned string.
347: */
348: char *
349: put_host_port(const char *host, u_short port)
350: {
351: char *hoststr;
352:
353: if (port == 0 || port == SSH_DEFAULT_PORT)
354: return(xstrdup(host));
355: if (asprintf(&hoststr, "[%s]:%d", host, (int)port) < 0)
356: fatal("put_host_port: asprintf: %s", strerror(errno));
357: debug3("put_host_port: %s", hoststr);
358: return hoststr;
1.28 djm 359: }
360:
361: /*
362: * Search for next delimiter between hostnames/addresses and ports.
363: * Argument may be modified (for termination).
364: * Returns *cp if parsing succeeds.
365: * *cp is set to the start of the next delimiter, if one was found.
366: * If this is the last field, *cp is set to NULL.
367: */
368: char *
369: hpdelim(char **cp)
370: {
371: char *s, *old;
372:
373: if (cp == NULL || *cp == NULL)
374: return NULL;
375:
376: old = s = *cp;
377: if (*s == '[') {
378: if ((s = strchr(s, ']')) == NULL)
379: return NULL;
380: else
381: s++;
382: } else if ((s = strpbrk(s, ":/")) == NULL)
383: s = *cp + strlen(*cp); /* skip to end (see first case below) */
384:
385: switch (*s) {
386: case '\0':
387: *cp = NULL; /* no more fields*/
388: break;
1.29 deraadt 389:
1.28 djm 390: case ':':
391: case '/':
392: *s = '\0'; /* terminate */
393: *cp = s + 1;
394: break;
1.29 deraadt 395:
1.28 djm 396: default:
397: return NULL;
398: }
399:
400: return old;
1.6 mouring 401: }
402:
403: char *
404: cleanhostname(char *host)
405: {
406: if (*host == '[' && host[strlen(host) - 1] == ']') {
407: host[strlen(host) - 1] = '\0';
408: return (host + 1);
409: } else
410: return host;
411: }
412:
413: char *
414: colon(char *cp)
415: {
416: int flag = 0;
417:
418: if (*cp == ':') /* Leading colon is part of file name. */
419: return (0);
420: if (*cp == '[')
421: flag = 1;
422:
423: for (; *cp; ++cp) {
424: if (*cp == '@' && *(cp+1) == '[')
425: flag = 1;
426: if (*cp == ']' && *(cp+1) == ':' && flag)
427: return (cp+1);
428: if (*cp == ':' && !flag)
429: return (cp);
430: if (*cp == '/')
431: return (0);
432: }
433: return (0);
1.7 mouring 434: }
435:
1.12 markus 436: /* function to assist building execv() arguments */
1.7 mouring 437: void
438: addargs(arglist *args, char *fmt, ...)
439: {
440: va_list ap;
1.42 djm 441: char *cp;
1.25 avsm 442: u_int nalloc;
1.42 djm 443: int r;
1.7 mouring 444:
445: va_start(ap, fmt);
1.42 djm 446: r = vasprintf(&cp, fmt, ap);
1.7 mouring 447: va_end(ap);
1.42 djm 448: if (r == -1)
449: fatal("addargs: argument too long");
1.7 mouring 450:
1.22 markus 451: nalloc = args->nalloc;
1.7 mouring 452: if (args->list == NULL) {
1.22 markus 453: nalloc = 32;
1.7 mouring 454: args->num = 0;
1.22 markus 455: } else if (args->num+2 >= nalloc)
456: nalloc *= 2;
1.7 mouring 457:
1.50 djm 458: args->list = xrealloc(args->list, nalloc, sizeof(char *));
1.22 markus 459: args->nalloc = nalloc;
1.42 djm 460: args->list[args->num++] = cp;
1.7 mouring 461: args->list[args->num] = NULL;
1.42 djm 462: }
463:
464: void
465: replacearg(arglist *args, u_int which, char *fmt, ...)
466: {
467: va_list ap;
468: char *cp;
469: int r;
470:
471: va_start(ap, fmt);
472: r = vasprintf(&cp, fmt, ap);
473: va_end(ap);
474: if (r == -1)
475: fatal("replacearg: argument too long");
476:
477: if (which >= args->num)
478: fatal("replacearg: tried to replace invalid arg %d >= %d",
479: which, args->num);
480: xfree(args->list[which]);
481: args->list[which] = cp;
482: }
483:
484: void
485: freeargs(arglist *args)
486: {
487: u_int i;
488:
489: if (args->list != NULL) {
490: for (i = 0; i < args->num; i++)
491: xfree(args->list[i]);
492: xfree(args->list);
493: args->nalloc = args->num = 0;
494: args->list = NULL;
495: }
1.30 djm 496: }
497:
498: /*
499: * Expands tildes in the file name. Returns data allocated by xmalloc.
500: * Warning: this calls getpw*.
501: */
502: char *
503: tilde_expand_filename(const char *filename, uid_t uid)
504: {
505: const char *path;
506: char user[128], ret[MAXPATHLEN];
507: struct passwd *pw;
1.32 djm 508: u_int len, slash;
1.30 djm 509:
510: if (*filename != '~')
511: return (xstrdup(filename));
512: filename++;
513:
514: path = strchr(filename, '/');
515: if (path != NULL && path > filename) { /* ~user/path */
1.32 djm 516: slash = path - filename;
517: if (slash > sizeof(user) - 1)
1.30 djm 518: fatal("tilde_expand_filename: ~username too long");
1.32 djm 519: memcpy(user, filename, slash);
520: user[slash] = '\0';
1.30 djm 521: if ((pw = getpwnam(user)) == NULL)
522: fatal("tilde_expand_filename: No such user %s", user);
523: } else if ((pw = getpwuid(uid)) == NULL) /* ~/path */
524: fatal("tilde_expand_filename: No such uid %d", uid);
525:
526: if (strlcpy(ret, pw->pw_dir, sizeof(ret)) >= sizeof(ret))
527: fatal("tilde_expand_filename: Path too long");
528:
529: /* Make sure directory has a trailing '/' */
530: len = strlen(pw->pw_dir);
531: if ((len == 0 || pw->pw_dir[len - 1] != '/') &&
532: strlcat(ret, "/", sizeof(ret)) >= sizeof(ret))
533: fatal("tilde_expand_filename: Path too long");
534:
535: /* Skip leading '/' from specified path */
536: if (path != NULL)
537: filename = path + 1;
538: if (strlcat(ret, filename, sizeof(ret)) >= sizeof(ret))
539: fatal("tilde_expand_filename: Path too long");
540:
541: return (xstrdup(ret));
1.31 djm 542: }
543:
544: /*
545: * Expand a string with a set of %[char] escapes. A number of escapes may be
546: * specified as (char *escape_chars, char *replacement) pairs. The list must
1.34 dtucker 547: * be terminated by a NULL escape_char. Returns replaced string in memory
1.31 djm 548: * allocated by xmalloc.
549: */
550: char *
551: percent_expand(const char *string, ...)
552: {
553: #define EXPAND_MAX_KEYS 16
554: struct {
555: const char *key;
556: const char *repl;
557: } keys[EXPAND_MAX_KEYS];
1.32 djm 558: u_int num_keys, i, j;
1.31 djm 559: char buf[4096];
560: va_list ap;
561:
562: /* Gather keys */
563: va_start(ap, string);
564: for (num_keys = 0; num_keys < EXPAND_MAX_KEYS; num_keys++) {
565: keys[num_keys].key = va_arg(ap, char *);
566: if (keys[num_keys].key == NULL)
567: break;
568: keys[num_keys].repl = va_arg(ap, char *);
569: if (keys[num_keys].repl == NULL)
570: fatal("percent_expand: NULL replacement");
571: }
572: va_end(ap);
573:
574: if (num_keys >= EXPAND_MAX_KEYS)
575: fatal("percent_expand: too many keys");
576:
577: /* Expand string */
578: *buf = '\0';
579: for (i = 0; *string != '\0'; string++) {
580: if (*string != '%') {
581: append:
582: buf[i++] = *string;
583: if (i >= sizeof(buf))
584: fatal("percent_expand: string too long");
585: buf[i] = '\0';
586: continue;
587: }
588: string++;
589: if (*string == '%')
590: goto append;
591: for (j = 0; j < num_keys; j++) {
592: if (strchr(keys[j].key, *string) != NULL) {
593: i = strlcat(buf, keys[j].repl, sizeof(buf));
594: if (i >= sizeof(buf))
595: fatal("percent_expand: string too long");
596: break;
597: }
598: }
599: if (j >= num_keys)
600: fatal("percent_expand: unknown key %%%c", *string);
601: }
602: return (xstrdup(buf));
603: #undef EXPAND_MAX_KEYS
1.26 dtucker 604: }
605:
606: /*
607: * Read an entire line from a public key file into a static buffer, discarding
608: * lines that exceed the buffer size. Returns 0 on success, -1 on failure.
609: */
610: int
611: read_keyfile_line(FILE *f, const char *filename, char *buf, size_t bufsz,
1.27 dtucker 612: u_long *lineno)
1.26 dtucker 613: {
614: while (fgets(buf, bufsz, f) != NULL) {
1.65 ray 615: if (buf[0] == '\0')
616: continue;
1.26 dtucker 617: (*lineno)++;
618: if (buf[strlen(buf) - 1] == '\n' || feof(f)) {
619: return 0;
620: } else {
1.27 dtucker 621: debug("%s: %s line %lu exceeds size limit", __func__,
622: filename, *lineno);
1.26 dtucker 623: /* discard remainder of line */
1.29 deraadt 624: while (fgetc(f) != '\n' && !feof(f))
1.26 dtucker 625: ; /* nothing */
626: }
627: }
628: return -1;
1.36 reyk 629: }
630:
631: int
1.37 reyk 632: tun_open(int tun, int mode)
1.36 reyk 633: {
1.37 reyk 634: struct ifreq ifr;
1.36 reyk 635: char name[100];
1.37 reyk 636: int fd = -1, sock;
1.36 reyk 637:
1.37 reyk 638: /* Open the tunnel device */
639: if (tun <= SSH_TUNID_MAX) {
1.36 reyk 640: snprintf(name, sizeof(name), "/dev/tun%d", tun);
1.37 reyk 641: fd = open(name, O_RDWR);
642: } else if (tun == SSH_TUNID_ANY) {
643: for (tun = 100; tun >= 0; tun--) {
644: snprintf(name, sizeof(name), "/dev/tun%d", tun);
645: if ((fd = open(name, O_RDWR)) >= 0)
646: break;
1.36 reyk 647: }
648: } else {
1.39 stevesk 649: debug("%s: invalid tunnel %u", __func__, tun);
1.37 reyk 650: return (-1);
651: }
652:
653: if (fd < 0) {
654: debug("%s: %s open failed: %s", __func__, name, strerror(errno));
655: return (-1);
1.36 reyk 656: }
1.37 reyk 657:
658: debug("%s: %s mode %d fd %d", __func__, name, mode, fd);
659:
660: /* Set the tunnel device operation mode */
661: snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tun%d", tun);
662: if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) == -1)
663: goto failed;
664:
665: if (ioctl(sock, SIOCGIFFLAGS, &ifr) == -1)
666: goto failed;
1.40 reyk 667:
668: /* Set interface mode */
669: ifr.ifr_flags &= ~IFF_UP;
670: if (mode == SSH_TUNMODE_ETHERNET)
1.37 reyk 671: ifr.ifr_flags |= IFF_LINK0;
1.40 reyk 672: else
673: ifr.ifr_flags &= ~IFF_LINK0;
674: if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1)
675: goto failed;
676:
677: /* Bring interface up */
1.37 reyk 678: ifr.ifr_flags |= IFF_UP;
679: if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1)
680: goto failed;
681:
682: close(sock);
683: return (fd);
684:
685: failed:
686: if (fd >= 0)
687: close(fd);
688: if (sock >= 0)
689: close(sock);
690: debug("%s: failed to set %s mode %d: %s", __func__, name,
691: mode, strerror(errno));
1.36 reyk 692: return (-1);
1.35 djm 693: }
694:
695: void
696: sanitise_stdfd(void)
697: {
1.41 djm 698: int nullfd, dupfd;
1.35 djm 699:
1.41 djm 700: if ((nullfd = dupfd = open(_PATH_DEVNULL, O_RDWR)) == -1) {
1.35 djm 701: fprintf(stderr, "Couldn't open /dev/null: %s", strerror(errno));
702: exit(1);
703: }
1.41 djm 704: while (++dupfd <= 2) {
705: /* Only clobber closed fds */
706: if (fcntl(dupfd, F_GETFL, 0) >= 0)
707: continue;
708: if (dup2(nullfd, dupfd) == -1) {
1.35 djm 709: fprintf(stderr, "dup2: %s", strerror(errno));
710: exit(1);
711: }
712: }
713: if (nullfd > 2)
714: close(nullfd);
1.1 markus 715: }
1.33 djm 716:
717: char *
1.52 djm 718: tohex(const void *vp, size_t l)
1.33 djm 719: {
1.52 djm 720: const u_char *p = (const u_char *)vp;
1.33 djm 721: char b[3], *r;
1.52 djm 722: size_t i, hl;
723:
724: if (l > 65536)
725: return xstrdup("tohex: length > 65536");
1.33 djm 726:
727: hl = l * 2 + 1;
1.49 djm 728: r = xcalloc(1, hl);
1.33 djm 729: for (i = 0; i < l; i++) {
1.52 djm 730: snprintf(b, sizeof(b), "%02x", p[i]);
1.33 djm 731: strlcat(r, b, hl);
732: }
733: return (r);
734: }
735:
1.52 djm 736: u_int64_t
737: get_u64(const void *vp)
738: {
739: const u_char *p = (const u_char *)vp;
740: u_int64_t v;
741:
742: v = (u_int64_t)p[0] << 56;
743: v |= (u_int64_t)p[1] << 48;
744: v |= (u_int64_t)p[2] << 40;
745: v |= (u_int64_t)p[3] << 32;
746: v |= (u_int64_t)p[4] << 24;
747: v |= (u_int64_t)p[5] << 16;
748: v |= (u_int64_t)p[6] << 8;
749: v |= (u_int64_t)p[7];
750:
751: return (v);
752: }
753:
754: u_int32_t
755: get_u32(const void *vp)
756: {
757: const u_char *p = (const u_char *)vp;
758: u_int32_t v;
759:
760: v = (u_int32_t)p[0] << 24;
761: v |= (u_int32_t)p[1] << 16;
762: v |= (u_int32_t)p[2] << 8;
763: v |= (u_int32_t)p[3];
764:
765: return (v);
766: }
767:
768: u_int16_t
769: get_u16(const void *vp)
770: {
771: const u_char *p = (const u_char *)vp;
772: u_int16_t v;
773:
774: v = (u_int16_t)p[0] << 8;
775: v |= (u_int16_t)p[1];
776:
777: return (v);
778: }
779:
780: void
781: put_u64(void *vp, u_int64_t v)
782: {
783: u_char *p = (u_char *)vp;
784:
785: p[0] = (u_char)(v >> 56) & 0xff;
786: p[1] = (u_char)(v >> 48) & 0xff;
787: p[2] = (u_char)(v >> 40) & 0xff;
788: p[3] = (u_char)(v >> 32) & 0xff;
789: p[4] = (u_char)(v >> 24) & 0xff;
790: p[5] = (u_char)(v >> 16) & 0xff;
791: p[6] = (u_char)(v >> 8) & 0xff;
792: p[7] = (u_char)v & 0xff;
793: }
794:
795: void
796: put_u32(void *vp, u_int32_t v)
797: {
798: u_char *p = (u_char *)vp;
799:
800: p[0] = (u_char)(v >> 24) & 0xff;
801: p[1] = (u_char)(v >> 16) & 0xff;
802: p[2] = (u_char)(v >> 8) & 0xff;
803: p[3] = (u_char)v & 0xff;
804: }
805:
806:
807: void
808: put_u16(void *vp, u_int16_t v)
809: {
810: u_char *p = (u_char *)vp;
811:
812: p[0] = (u_char)(v >> 8) & 0xff;
813: p[1] = (u_char)v & 0xff;
814: }
1.68 ! dtucker 815:
! 816: void
! 817: ms_subtract_diff(struct timeval *start, int *ms)
! 818: {
! 819: struct timeval diff, finish;
! 820:
! 821: gettimeofday(&finish, NULL);
! 822: timersub(&finish, start, &diff);
! 823: *ms -= (diff.tv_sec * 1000) + (diff.tv_usec / 1000);
! 824: }
! 825:
! 826: void
! 827: ms_to_timeval(struct timeval *tv, int ms)
! 828: {
! 829: if (ms < 0)
! 830: ms = 0;
! 831: tv->tv_sec = ms / 1000;
! 832: tv->tv_usec = (ms % 1000) * 1000;
! 833: }
! 834:
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