Annotation of src/usr.bin/ssh/misc.c, Revision 1.75
1.75 ! dtucker 1: /* $OpenBSD: misc.c,v 1.71 2009/02/21 19:32:04 tobias 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));
1.72 reyk 145: }
146:
1.1 markus 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.
1.70 djm 211: * Port must be >=0 and <=65535.
212: * Return -1 if invalid.
1.12 markus 213: */
214: int
215: a2port(const char *s)
1.5 stevesk 216: {
1.70 djm 217: long long port;
218: const char *errstr;
1.5 stevesk 219:
1.70 djm 220: port = strtonum(s, 0, 65535, &errstr);
221: if (errstr != NULL)
222: return -1;
223: return (int)port;
1.9 stevesk 224: }
225:
1.36 reyk 226: int
227: a2tun(const char *s, int *remote)
228: {
229: const char *errstr = NULL;
230: char *sp, *ep;
231: int tun;
232:
233: if (remote != NULL) {
1.37 reyk 234: *remote = SSH_TUNID_ANY;
1.36 reyk 235: sp = xstrdup(s);
236: if ((ep = strchr(sp, ':')) == NULL) {
237: xfree(sp);
238: return (a2tun(s, NULL));
239: }
240: ep[0] = '\0'; ep++;
241: *remote = a2tun(ep, NULL);
242: tun = a2tun(sp, NULL);
243: xfree(sp);
1.37 reyk 244: return (*remote == SSH_TUNID_ERR ? *remote : tun);
1.36 reyk 245: }
246:
247: if (strcasecmp(s, "any") == 0)
1.37 reyk 248: return (SSH_TUNID_ANY);
1.36 reyk 249:
1.37 reyk 250: tun = strtonum(s, 0, SSH_TUNID_MAX, &errstr);
251: if (errstr != NULL)
252: return (SSH_TUNID_ERR);
1.36 reyk 253:
254: return (tun);
255: }
256:
1.9 stevesk 257: #define SECONDS 1
258: #define MINUTES (SECONDS * 60)
259: #define HOURS (MINUTES * 60)
260: #define DAYS (HOURS * 24)
261: #define WEEKS (DAYS * 7)
262:
1.12 markus 263: /*
264: * Convert a time string into seconds; format is
265: * a sequence of:
266: * time[qualifier]
267: *
268: * Valid time qualifiers are:
269: * <none> seconds
270: * s|S seconds
271: * m|M minutes
272: * h|H hours
273: * d|D days
274: * w|W weeks
275: *
276: * Examples:
277: * 90m 90 minutes
278: * 1h30m 90 minutes
279: * 2d 2 days
280: * 1w 1 week
281: *
282: * Return -1 if time string is invalid.
283: */
284: long
285: convtime(const char *s)
1.9 stevesk 286: {
287: long total, secs;
288: const char *p;
289: char *endp;
290:
291: errno = 0;
292: total = 0;
293: p = s;
294:
295: if (p == NULL || *p == '\0')
296: return -1;
297:
298: while (*p) {
299: secs = strtol(p, &endp, 10);
300: if (p == endp ||
301: (errno == ERANGE && (secs == LONG_MIN || secs == LONG_MAX)) ||
302: secs < 0)
303: return -1;
304:
305: switch (*endp++) {
306: case '\0':
307: endp--;
1.48 deraadt 308: break;
1.9 stevesk 309: case 's':
310: case 'S':
311: break;
312: case 'm':
313: case 'M':
314: secs *= MINUTES;
315: break;
316: case 'h':
317: case 'H':
318: secs *= HOURS;
319: break;
320: case 'd':
321: case 'D':
322: secs *= DAYS;
323: break;
324: case 'w':
325: case 'W':
326: secs *= WEEKS;
327: break;
328: default:
329: return -1;
330: }
331: total += secs;
332: if (total < 0)
333: return -1;
334: p = endp;
335: }
336:
337: return total;
1.56 dtucker 338: }
339:
340: /*
341: * Returns a standardized host+port identifier string.
342: * Caller must free returned string.
343: */
344: char *
345: put_host_port(const char *host, u_short port)
346: {
347: char *hoststr;
348:
349: if (port == 0 || port == SSH_DEFAULT_PORT)
350: return(xstrdup(host));
351: if (asprintf(&hoststr, "[%s]:%d", host, (int)port) < 0)
352: fatal("put_host_port: asprintf: %s", strerror(errno));
353: debug3("put_host_port: %s", hoststr);
354: return hoststr;
1.28 djm 355: }
356:
357: /*
358: * Search for next delimiter between hostnames/addresses and ports.
359: * Argument may be modified (for termination).
360: * Returns *cp if parsing succeeds.
361: * *cp is set to the start of the next delimiter, if one was found.
362: * If this is the last field, *cp is set to NULL.
363: */
364: char *
365: hpdelim(char **cp)
366: {
367: char *s, *old;
368:
369: if (cp == NULL || *cp == NULL)
370: return NULL;
371:
372: old = s = *cp;
373: if (*s == '[') {
374: if ((s = strchr(s, ']')) == NULL)
375: return NULL;
376: else
377: s++;
378: } else if ((s = strpbrk(s, ":/")) == NULL)
379: s = *cp + strlen(*cp); /* skip to end (see first case below) */
380:
381: switch (*s) {
382: case '\0':
383: *cp = NULL; /* no more fields*/
384: break;
1.29 deraadt 385:
1.28 djm 386: case ':':
387: case '/':
388: *s = '\0'; /* terminate */
389: *cp = s + 1;
390: break;
1.29 deraadt 391:
1.28 djm 392: default:
393: return NULL;
394: }
395:
396: return old;
1.6 mouring 397: }
398:
399: char *
400: cleanhostname(char *host)
401: {
402: if (*host == '[' && host[strlen(host) - 1] == ']') {
403: host[strlen(host) - 1] = '\0';
404: return (host + 1);
405: } else
406: return host;
407: }
408:
409: char *
410: colon(char *cp)
411: {
412: int flag = 0;
413:
414: if (*cp == ':') /* Leading colon is part of file name. */
415: return (0);
416: if (*cp == '[')
417: flag = 1;
418:
419: for (; *cp; ++cp) {
420: if (*cp == '@' && *(cp+1) == '[')
421: flag = 1;
422: if (*cp == ']' && *(cp+1) == ':' && flag)
423: return (cp+1);
424: if (*cp == ':' && !flag)
425: return (cp);
426: if (*cp == '/')
427: return (0);
428: }
429: return (0);
1.7 mouring 430: }
431:
1.12 markus 432: /* function to assist building execv() arguments */
1.7 mouring 433: void
434: addargs(arglist *args, char *fmt, ...)
435: {
436: va_list ap;
1.42 djm 437: char *cp;
1.25 avsm 438: u_int nalloc;
1.42 djm 439: int r;
1.7 mouring 440:
441: va_start(ap, fmt);
1.42 djm 442: r = vasprintf(&cp, fmt, ap);
1.7 mouring 443: va_end(ap);
1.42 djm 444: if (r == -1)
445: fatal("addargs: argument too long");
1.7 mouring 446:
1.22 markus 447: nalloc = args->nalloc;
1.7 mouring 448: if (args->list == NULL) {
1.22 markus 449: nalloc = 32;
1.7 mouring 450: args->num = 0;
1.22 markus 451: } else if (args->num+2 >= nalloc)
452: nalloc *= 2;
1.7 mouring 453:
1.50 djm 454: args->list = xrealloc(args->list, nalloc, sizeof(char *));
1.22 markus 455: args->nalloc = nalloc;
1.42 djm 456: args->list[args->num++] = cp;
1.7 mouring 457: args->list[args->num] = NULL;
1.42 djm 458: }
459:
460: void
461: replacearg(arglist *args, u_int which, char *fmt, ...)
462: {
463: va_list ap;
464: char *cp;
465: int r;
466:
467: va_start(ap, fmt);
468: r = vasprintf(&cp, fmt, ap);
469: va_end(ap);
470: if (r == -1)
471: fatal("replacearg: argument too long");
472:
473: if (which >= args->num)
474: fatal("replacearg: tried to replace invalid arg %d >= %d",
475: which, args->num);
476: xfree(args->list[which]);
477: args->list[which] = cp;
478: }
479:
480: void
481: freeargs(arglist *args)
482: {
483: u_int i;
484:
485: if (args->list != NULL) {
486: for (i = 0; i < args->num; i++)
487: xfree(args->list[i]);
488: xfree(args->list);
489: args->nalloc = args->num = 0;
490: args->list = NULL;
491: }
1.30 djm 492: }
493:
494: /*
495: * Expands tildes in the file name. Returns data allocated by xmalloc.
496: * Warning: this calls getpw*.
497: */
498: char *
499: tilde_expand_filename(const char *filename, uid_t uid)
500: {
501: const char *path;
502: char user[128], ret[MAXPATHLEN];
503: struct passwd *pw;
1.32 djm 504: u_int len, slash;
1.30 djm 505:
506: if (*filename != '~')
507: return (xstrdup(filename));
508: filename++;
509:
510: path = strchr(filename, '/');
511: if (path != NULL && path > filename) { /* ~user/path */
1.32 djm 512: slash = path - filename;
513: if (slash > sizeof(user) - 1)
1.30 djm 514: fatal("tilde_expand_filename: ~username too long");
1.32 djm 515: memcpy(user, filename, slash);
516: user[slash] = '\0';
1.30 djm 517: if ((pw = getpwnam(user)) == NULL)
518: fatal("tilde_expand_filename: No such user %s", user);
519: } else if ((pw = getpwuid(uid)) == NULL) /* ~/path */
1.69 dtucker 520: fatal("tilde_expand_filename: No such uid %ld", (long)uid);
1.30 djm 521:
522: if (strlcpy(ret, pw->pw_dir, sizeof(ret)) >= sizeof(ret))
523: fatal("tilde_expand_filename: Path too long");
524:
525: /* Make sure directory has a trailing '/' */
526: len = strlen(pw->pw_dir);
527: if ((len == 0 || pw->pw_dir[len - 1] != '/') &&
528: strlcat(ret, "/", sizeof(ret)) >= sizeof(ret))
529: fatal("tilde_expand_filename: Path too long");
530:
531: /* Skip leading '/' from specified path */
532: if (path != NULL)
533: filename = path + 1;
534: if (strlcat(ret, filename, sizeof(ret)) >= sizeof(ret))
535: fatal("tilde_expand_filename: Path too long");
536:
537: return (xstrdup(ret));
1.31 djm 538: }
539:
540: /*
541: * Expand a string with a set of %[char] escapes. A number of escapes may be
542: * specified as (char *escape_chars, char *replacement) pairs. The list must
1.34 dtucker 543: * be terminated by a NULL escape_char. Returns replaced string in memory
1.31 djm 544: * allocated by xmalloc.
545: */
546: char *
547: percent_expand(const char *string, ...)
548: {
549: #define EXPAND_MAX_KEYS 16
1.73 djm 550: u_int num_keys, i, j;
1.31 djm 551: struct {
552: const char *key;
553: const char *repl;
554: } keys[EXPAND_MAX_KEYS];
555: char buf[4096];
556: va_list ap;
557:
558: /* Gather keys */
559: va_start(ap, string);
560: for (num_keys = 0; num_keys < EXPAND_MAX_KEYS; num_keys++) {
561: keys[num_keys].key = va_arg(ap, char *);
562: if (keys[num_keys].key == NULL)
563: break;
564: keys[num_keys].repl = va_arg(ap, char *);
565: if (keys[num_keys].repl == NULL)
1.73 djm 566: fatal("%s: NULL replacement", __func__);
1.31 djm 567: }
1.73 djm 568: if (num_keys == EXPAND_MAX_KEYS && va_arg(ap, char *) != NULL)
569: fatal("%s: too many keys", __func__);
1.31 djm 570: va_end(ap);
571:
572: /* Expand string */
573: *buf = '\0';
574: for (i = 0; *string != '\0'; string++) {
575: if (*string != '%') {
576: append:
577: buf[i++] = *string;
578: if (i >= sizeof(buf))
1.73 djm 579: fatal("%s: string too long", __func__);
1.31 djm 580: buf[i] = '\0';
581: continue;
582: }
583: string++;
1.73 djm 584: /* %% case */
1.31 djm 585: if (*string == '%')
586: goto append;
587: for (j = 0; j < num_keys; j++) {
588: if (strchr(keys[j].key, *string) != NULL) {
589: i = strlcat(buf, keys[j].repl, sizeof(buf));
590: if (i >= sizeof(buf))
1.73 djm 591: fatal("%s: string too long", __func__);
1.31 djm 592: break;
593: }
594: }
595: if (j >= num_keys)
1.73 djm 596: fatal("%s: unknown key %%%c", __func__, *string);
1.31 djm 597: }
598: return (xstrdup(buf));
599: #undef EXPAND_MAX_KEYS
1.26 dtucker 600: }
601:
602: /*
603: * Read an entire line from a public key file into a static buffer, discarding
604: * lines that exceed the buffer size. Returns 0 on success, -1 on failure.
605: */
606: int
607: read_keyfile_line(FILE *f, const char *filename, char *buf, size_t bufsz,
1.27 dtucker 608: u_long *lineno)
1.26 dtucker 609: {
610: while (fgets(buf, bufsz, f) != NULL) {
1.65 ray 611: if (buf[0] == '\0')
612: continue;
1.26 dtucker 613: (*lineno)++;
614: if (buf[strlen(buf) - 1] == '\n' || feof(f)) {
615: return 0;
616: } else {
1.27 dtucker 617: debug("%s: %s line %lu exceeds size limit", __func__,
618: filename, *lineno);
1.26 dtucker 619: /* discard remainder of line */
1.29 deraadt 620: while (fgetc(f) != '\n' && !feof(f))
1.26 dtucker 621: ; /* nothing */
622: }
623: }
624: return -1;
1.36 reyk 625: }
626:
627: int
1.37 reyk 628: tun_open(int tun, int mode)
1.36 reyk 629: {
1.37 reyk 630: struct ifreq ifr;
1.36 reyk 631: char name[100];
1.37 reyk 632: int fd = -1, sock;
1.36 reyk 633:
1.37 reyk 634: /* Open the tunnel device */
635: if (tun <= SSH_TUNID_MAX) {
1.36 reyk 636: snprintf(name, sizeof(name), "/dev/tun%d", tun);
1.37 reyk 637: fd = open(name, O_RDWR);
638: } else if (tun == SSH_TUNID_ANY) {
639: for (tun = 100; tun >= 0; tun--) {
640: snprintf(name, sizeof(name), "/dev/tun%d", tun);
641: if ((fd = open(name, O_RDWR)) >= 0)
642: break;
1.36 reyk 643: }
644: } else {
1.39 stevesk 645: debug("%s: invalid tunnel %u", __func__, tun);
1.37 reyk 646: return (-1);
647: }
648:
649: if (fd < 0) {
650: debug("%s: %s open failed: %s", __func__, name, strerror(errno));
651: return (-1);
1.36 reyk 652: }
1.37 reyk 653:
654: debug("%s: %s mode %d fd %d", __func__, name, mode, fd);
655:
656: /* Set the tunnel device operation mode */
657: snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tun%d", tun);
658: if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) == -1)
659: goto failed;
660:
661: if (ioctl(sock, SIOCGIFFLAGS, &ifr) == -1)
662: goto failed;
1.40 reyk 663:
664: /* Set interface mode */
665: ifr.ifr_flags &= ~IFF_UP;
666: if (mode == SSH_TUNMODE_ETHERNET)
1.37 reyk 667: ifr.ifr_flags |= IFF_LINK0;
1.40 reyk 668: else
669: ifr.ifr_flags &= ~IFF_LINK0;
670: if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1)
671: goto failed;
672:
673: /* Bring interface up */
1.37 reyk 674: ifr.ifr_flags |= IFF_UP;
675: if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1)
676: goto failed;
677:
678: close(sock);
679: return (fd);
680:
681: failed:
682: if (fd >= 0)
683: close(fd);
684: if (sock >= 0)
685: close(sock);
686: debug("%s: failed to set %s mode %d: %s", __func__, name,
687: mode, strerror(errno));
1.36 reyk 688: return (-1);
1.35 djm 689: }
690:
691: void
692: sanitise_stdfd(void)
693: {
1.41 djm 694: int nullfd, dupfd;
1.35 djm 695:
1.41 djm 696: if ((nullfd = dupfd = open(_PATH_DEVNULL, O_RDWR)) == -1) {
1.71 tobias 697: fprintf(stderr, "Couldn't open /dev/null: %s\n",
698: strerror(errno));
1.35 djm 699: exit(1);
700: }
1.41 djm 701: while (++dupfd <= 2) {
702: /* Only clobber closed fds */
703: if (fcntl(dupfd, F_GETFL, 0) >= 0)
704: continue;
705: if (dup2(nullfd, dupfd) == -1) {
1.71 tobias 706: fprintf(stderr, "dup2: %s\n", strerror(errno));
1.35 djm 707: exit(1);
708: }
709: }
710: if (nullfd > 2)
711: close(nullfd);
1.1 markus 712: }
1.33 djm 713:
714: char *
1.52 djm 715: tohex(const void *vp, size_t l)
1.33 djm 716: {
1.52 djm 717: const u_char *p = (const u_char *)vp;
1.33 djm 718: char b[3], *r;
1.52 djm 719: size_t i, hl;
720:
721: if (l > 65536)
722: return xstrdup("tohex: length > 65536");
1.33 djm 723:
724: hl = l * 2 + 1;
1.49 djm 725: r = xcalloc(1, hl);
1.33 djm 726: for (i = 0; i < l; i++) {
1.52 djm 727: snprintf(b, sizeof(b), "%02x", p[i]);
1.33 djm 728: strlcat(r, b, hl);
729: }
730: return (r);
731: }
732:
1.52 djm 733: u_int64_t
734: get_u64(const void *vp)
735: {
736: const u_char *p = (const u_char *)vp;
737: u_int64_t v;
738:
739: v = (u_int64_t)p[0] << 56;
740: v |= (u_int64_t)p[1] << 48;
741: v |= (u_int64_t)p[2] << 40;
742: v |= (u_int64_t)p[3] << 32;
743: v |= (u_int64_t)p[4] << 24;
744: v |= (u_int64_t)p[5] << 16;
745: v |= (u_int64_t)p[6] << 8;
746: v |= (u_int64_t)p[7];
747:
748: return (v);
749: }
750:
751: u_int32_t
752: get_u32(const void *vp)
753: {
754: const u_char *p = (const u_char *)vp;
755: u_int32_t v;
756:
757: v = (u_int32_t)p[0] << 24;
758: v |= (u_int32_t)p[1] << 16;
759: v |= (u_int32_t)p[2] << 8;
760: v |= (u_int32_t)p[3];
761:
762: return (v);
763: }
764:
765: u_int16_t
766: get_u16(const void *vp)
767: {
768: const u_char *p = (const u_char *)vp;
769: u_int16_t v;
770:
771: v = (u_int16_t)p[0] << 8;
772: v |= (u_int16_t)p[1];
773:
774: return (v);
775: }
776:
777: void
778: put_u64(void *vp, u_int64_t v)
779: {
780: u_char *p = (u_char *)vp;
781:
782: p[0] = (u_char)(v >> 56) & 0xff;
783: p[1] = (u_char)(v >> 48) & 0xff;
784: p[2] = (u_char)(v >> 40) & 0xff;
785: p[3] = (u_char)(v >> 32) & 0xff;
786: p[4] = (u_char)(v >> 24) & 0xff;
787: p[5] = (u_char)(v >> 16) & 0xff;
788: p[6] = (u_char)(v >> 8) & 0xff;
789: p[7] = (u_char)v & 0xff;
790: }
791:
792: void
793: put_u32(void *vp, u_int32_t v)
794: {
795: u_char *p = (u_char *)vp;
796:
797: p[0] = (u_char)(v >> 24) & 0xff;
798: p[1] = (u_char)(v >> 16) & 0xff;
799: p[2] = (u_char)(v >> 8) & 0xff;
800: p[3] = (u_char)v & 0xff;
801: }
802:
803:
804: void
805: put_u16(void *vp, u_int16_t v)
806: {
807: u_char *p = (u_char *)vp;
808:
809: p[0] = (u_char)(v >> 8) & 0xff;
810: p[1] = (u_char)v & 0xff;
811: }
1.68 dtucker 812:
813: void
814: ms_subtract_diff(struct timeval *start, int *ms)
815: {
816: struct timeval diff, finish;
817:
818: gettimeofday(&finish, NULL);
819: timersub(&finish, start, &diff);
820: *ms -= (diff.tv_sec * 1000) + (diff.tv_usec / 1000);
821: }
822:
823: void
824: ms_to_timeval(struct timeval *tv, int ms)
825: {
826: if (ms < 0)
827: ms = 0;
828: tv->tv_sec = ms / 1000;
829: tv->tv_usec = (ms % 1000) * 1000;
830: }
831:
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