Darren Tucker | 7bd98e7 | 2010-01-10 10:31:12 +1100 | [diff] [blame] | 1 | /* $OpenBSD: misc.c,v 1.75 2010/01/09 23:04:13 dtucker Exp $ */ |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (c) 2000 Markus Friedl. All rights reserved. |
Damien Miller | 3f94188 | 2006-03-31 23:13:02 +1100 | [diff] [blame] | 4 | * Copyright (c) 2005,2006 Damien Miller. All rights reserved. |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 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 | |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 27 | #include "includes.h" |
Damien Miller | 17e91c0 | 2006-03-15 11:28:34 +1100 | [diff] [blame] | 28 | |
Damien Miller | 9f2abc4 | 2006-07-10 20:53:08 +1000 | [diff] [blame] | 29 | #include <sys/types.h> |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 30 | #include <sys/ioctl.h> |
Damien Miller | 8ec8c3e | 2006-07-10 20:35:38 +1000 | [diff] [blame] | 31 | #include <sys/socket.h> |
Damien Miller | 8dbffe7 | 2006-08-05 11:02:17 +1000 | [diff] [blame] | 32 | #include <sys/param.h> |
Damien Miller | 8ec8c3e | 2006-07-10 20:35:38 +1000 | [diff] [blame] | 33 | |
Darren Tucker | 5d19626 | 2006-07-12 22:15:16 +1000 | [diff] [blame] | 34 | #include <stdarg.h> |
Damien Miller | a7a73ee | 2006-08-05 11:37:59 +1000 | [diff] [blame] | 35 | #include <stdio.h> |
Damien Miller | e7a1e5c | 2006-08-05 11:34:19 +1000 | [diff] [blame] | 36 | #include <stdlib.h> |
Damien Miller | e3476ed | 2006-07-24 14:13:33 +1000 | [diff] [blame] | 37 | #include <string.h> |
Damien Miller | e6b3b61 | 2006-07-24 14:01:23 +1000 | [diff] [blame] | 38 | #include <unistd.h> |
Darren Tucker | 5d19626 | 2006-07-12 22:15:16 +1000 | [diff] [blame] | 39 | |
Damien Miller | 8ec8c3e | 2006-07-10 20:35:38 +1000 | [diff] [blame] | 40 | #include <netinet/in.h> |
Damien Miller | 3a4051e | 2006-03-15 11:19:42 +1100 | [diff] [blame] | 41 | #include <netinet/tcp.h> |
Damien Miller | 8ec8c3e | 2006-07-10 20:35:38 +1000 | [diff] [blame] | 42 | |
Darren Tucker | 3997249 | 2006-07-12 22:22:46 +1000 | [diff] [blame] | 43 | #include <errno.h> |
Damien Miller | 57cf638 | 2006-07-10 21:13:46 +1000 | [diff] [blame] | 44 | #include <fcntl.h> |
Darren Tucker | 4abde77 | 2007-12-29 02:43:51 +1100 | [diff] [blame] | 45 | #include <netdb.h> |
Damien Miller | 03e2003 | 2006-03-15 11:16:59 +1100 | [diff] [blame] | 46 | #ifdef HAVE_PATHS_H |
Damien Miller | a9263d0 | 2006-03-15 11:18:26 +1100 | [diff] [blame] | 47 | # include <paths.h> |
Damien Miller | 9f2abc4 | 2006-07-10 20:53:08 +1000 | [diff] [blame] | 48 | #include <pwd.h> |
Damien Miller | 03e2003 | 2006-03-15 11:16:59 +1100 | [diff] [blame] | 49 | #endif |
Damien Miller | 3beb852 | 2006-01-02 23:40:10 +1100 | [diff] [blame] | 50 | #ifdef SSH_TUN_OPENBSD |
| 51 | #include <net/if.h> |
| 52 | #endif |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 53 | |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 54 | #include "xmalloc.h" |
Kevin Steves | b6e773a | 2001-02-04 13:20:36 +0000 | [diff] [blame] | 55 | #include "misc.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 56 | #include "log.h" |
Darren Tucker | da34553 | 2006-07-10 23:04:19 +1000 | [diff] [blame] | 57 | #include "ssh.h" |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 58 | |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 59 | /* remove newline at end of string */ |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 60 | char * |
| 61 | chop(char *s) |
| 62 | { |
| 63 | char *t = s; |
| 64 | while (*t) { |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 65 | if (*t == '\n' || *t == '\r') { |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 66 | *t = '\0'; |
| 67 | return s; |
| 68 | } |
| 69 | t++; |
| 70 | } |
| 71 | return s; |
| 72 | |
| 73 | } |
| 74 | |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 75 | /* set/unset filedescriptor to non-blocking */ |
Damien Miller | 232711f | 2004-06-15 10:35:30 +1000 | [diff] [blame] | 76 | int |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 77 | set_nonblock(int fd) |
| 78 | { |
| 79 | int val; |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 80 | |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 81 | val = fcntl(fd, F_GETFL, 0); |
| 82 | if (val < 0) { |
| 83 | error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno)); |
Damien Miller | 232711f | 2004-06-15 10:35:30 +1000 | [diff] [blame] | 84 | return (-1); |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 85 | } |
Damien Miller | 69b69aa | 2000-10-28 14:19:58 +1100 | [diff] [blame] | 86 | if (val & O_NONBLOCK) { |
Damien Miller | 232711f | 2004-06-15 10:35:30 +1000 | [diff] [blame] | 87 | debug3("fd %d is O_NONBLOCK", fd); |
| 88 | return (0); |
Damien Miller | 69b69aa | 2000-10-28 14:19:58 +1100 | [diff] [blame] | 89 | } |
Damien Miller | ef095ce | 2003-05-14 13:41:39 +1000 | [diff] [blame] | 90 | debug2("fd %d setting O_NONBLOCK", fd); |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 91 | val |= O_NONBLOCK; |
Damien Miller | 232711f | 2004-06-15 10:35:30 +1000 | [diff] [blame] | 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); |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 98 | } |
| 99 | |
Damien Miller | 232711f | 2004-06-15 10:35:30 +1000 | [diff] [blame] | 100 | int |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 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)); |
Damien Miller | 232711f | 2004-06-15 10:35:30 +1000 | [diff] [blame] | 108 | return (-1); |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 109 | } |
| 110 | if (!(val & O_NONBLOCK)) { |
Damien Miller | 232711f | 2004-06-15 10:35:30 +1000 | [diff] [blame] | 111 | debug3("fd %d is not O_NONBLOCK", fd); |
| 112 | return (0); |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 113 | } |
Ben Lindstrom | 352b1c2 | 2001-06-21 03:04:37 +0000 | [diff] [blame] | 114 | debug("fd %d clearing O_NONBLOCK", fd); |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 115 | val &= ~O_NONBLOCK; |
Damien Miller | 232711f | 2004-06-15 10:35:30 +1000 | [diff] [blame] | 116 | if (fcntl(fd, F_SETFL, val) == -1) { |
| 117 | debug("fcntl(%d, F_SETFL, ~O_NONBLOCK): %s", |
Ben Lindstrom | 84fcb31 | 2002-03-05 01:48:09 +0000 | [diff] [blame] | 118 | fd, strerror(errno)); |
Damien Miller | 232711f | 2004-06-15 10:35:30 +1000 | [diff] [blame] | 119 | return (-1); |
| 120 | } |
| 121 | return (0); |
Ben Lindstrom | c93e84c | 2001-05-12 00:08:37 +0000 | [diff] [blame] | 122 | } |
| 123 | |
Darren Tucker | 4abde77 | 2007-12-29 02:43:51 +1100 | [diff] [blame] | 124 | const char * |
| 125 | ssh_gai_strerror(int gaierr) |
| 126 | { |
Darren Tucker | 912428c | 2008-01-01 20:33:35 +1100 | [diff] [blame] | 127 | if (gaierr == EAI_SYSTEM) |
| 128 | return strerror(errno); |
| 129 | return gai_strerror(gaierr); |
Darren Tucker | 4abde77 | 2007-12-29 02:43:51 +1100 | [diff] [blame] | 130 | } |
| 131 | |
Damien Miller | 398e1cf | 2002-02-05 11:52:13 +1100 | [diff] [blame] | 132 | /* disable nagle on socket */ |
| 133 | void |
| 134 | set_nodelay(int fd) |
| 135 | { |
Ben Lindstrom | e86de51 | 2002-03-05 01:28:14 +0000 | [diff] [blame] | 136 | int opt; |
| 137 | socklen_t optlen; |
Damien Miller | 398e1cf | 2002-02-05 11:52:13 +1100 | [diff] [blame] | 138 | |
Ben Lindstrom | 1ebd7a5 | 2002-02-26 18:12:51 +0000 | [diff] [blame] | 139 | optlen = sizeof opt; |
| 140 | if (getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, &optlen) == -1) { |
Darren Tucker | 6db8f93 | 2003-11-03 20:07:14 +1100 | [diff] [blame] | 141 | debug("getsockopt TCP_NODELAY: %.100s", strerror(errno)); |
Ben Lindstrom | 1ebd7a5 | 2002-02-26 18:12:51 +0000 | [diff] [blame] | 142 | return; |
| 143 | } |
| 144 | if (opt == 1) { |
| 145 | debug2("fd %d is TCP_NODELAY", fd); |
| 146 | return; |
| 147 | } |
| 148 | opt = 1; |
Ben Lindstrom | 1d568f9 | 2002-12-23 02:44:36 +0000 | [diff] [blame] | 149 | debug2("fd %d setting TCP_NODELAY", fd); |
Ben Lindstrom | 1ebd7a5 | 2002-02-26 18:12:51 +0000 | [diff] [blame] | 150 | if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof opt) == -1) |
Damien Miller | 398e1cf | 2002-02-05 11:52:13 +1100 | [diff] [blame] | 151 | error("setsockopt TCP_NODELAY: %.100s", strerror(errno)); |
| 152 | } |
| 153 | |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 154 | /* Characters considered whitespace in strsep calls. */ |
| 155 | #define WHITESPACE " \t\r\n" |
Damien Miller | 306d118 | 2006-03-15 12:05:59 +1100 | [diff] [blame] | 156 | #define QUOTE "\"" |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 157 | |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 158 | /* return next token in configuration line */ |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 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 | |
Damien Miller | 306d118 | 2006-03-15 12:05:59 +1100 | [diff] [blame] | 170 | *s = strpbrk(*s, WHITESPACE QUOTE "="); |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 171 | if (*s == NULL) |
| 172 | return (old); |
| 173 | |
Damien Miller | 306d118 | 2006-03-15 12:05:59 +1100 | [diff] [blame] | 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 | |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 185 | /* Allow only one '=' to be skipped */ |
| 186 | if (*s[0] == '=') |
| 187 | wspace = 1; |
| 188 | *s[0] = '\0'; |
| 189 | |
Damien Miller | 306d118 | 2006-03-15 12:05:59 +1100 | [diff] [blame] | 190 | /* Skip any extra whitespace after first token */ |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 191 | *s += strspn(*s + 1, WHITESPACE) + 1; |
| 192 | if (*s[0] == '=' && !wspace) |
| 193 | *s += strspn(*s + 1, WHITESPACE) + 1; |
| 194 | |
| 195 | return (old); |
| 196 | } |
Kevin Steves | b6e773a | 2001-02-04 13:20:36 +0000 | [diff] [blame] | 197 | |
Ben Lindstrom | 086cf21 | 2001-03-05 05:56:40 +0000 | [diff] [blame] | 198 | struct passwd * |
| 199 | pwcopy(struct passwd *pw) |
| 200 | { |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 201 | struct passwd *copy = xcalloc(1, sizeof(*copy)); |
Ben Lindstrom | 4030442 | 2001-03-05 06:22:01 +0000 | [diff] [blame] | 202 | |
Ben Lindstrom | 086cf21 | 2001-03-05 05:56:40 +0000 | [diff] [blame] | 203 | copy->pw_name = xstrdup(pw->pw_name); |
| 204 | copy->pw_passwd = xstrdup(pw->pw_passwd); |
Ben Lindstrom | 4030442 | 2001-03-05 06:22:01 +0000 | [diff] [blame] | 205 | copy->pw_gecos = xstrdup(pw->pw_gecos); |
Ben Lindstrom | 086cf21 | 2001-03-05 05:56:40 +0000 | [diff] [blame] | 206 | copy->pw_uid = pw->pw_uid; |
| 207 | copy->pw_gid = pw->pw_gid; |
Kevin Steves | 8245695 | 2001-06-22 21:14:18 +0000 | [diff] [blame] | 208 | #ifdef HAVE_PW_EXPIRE_IN_PASSWD |
Ben Lindstrom | 3af4d46 | 2001-06-21 03:11:27 +0000 | [diff] [blame] | 209 | copy->pw_expire = pw->pw_expire; |
Kevin Steves | 8245695 | 2001-06-22 21:14:18 +0000 | [diff] [blame] | 210 | #endif |
| 211 | #ifdef HAVE_PW_CHANGE_IN_PASSWD |
Ben Lindstrom | 3af4d46 | 2001-06-21 03:11:27 +0000 | [diff] [blame] | 212 | copy->pw_change = pw->pw_change; |
Kevin Steves | 8245695 | 2001-06-22 21:14:18 +0000 | [diff] [blame] | 213 | #endif |
Ben Lindstrom | 0f68db4 | 2001-03-05 07:57:09 +0000 | [diff] [blame] | 214 | #ifdef HAVE_PW_CLASS_IN_PASSWD |
Ben Lindstrom | 086cf21 | 2001-03-05 05:56:40 +0000 | [diff] [blame] | 215 | copy->pw_class = xstrdup(pw->pw_class); |
Ben Lindstrom | 0f68db4 | 2001-03-05 07:57:09 +0000 | [diff] [blame] | 216 | #endif |
Ben Lindstrom | 086cf21 | 2001-03-05 05:56:40 +0000 | [diff] [blame] | 217 | copy->pw_dir = xstrdup(pw->pw_dir); |
| 218 | copy->pw_shell = xstrdup(pw->pw_shell); |
| 219 | return copy; |
| 220 | } |
| 221 | |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 222 | /* |
| 223 | * Convert ASCII string to TCP/IP port number. |
Damien Miller | 3dc71ad | 2009-01-28 16:31:22 +1100 | [diff] [blame] | 224 | * Port must be >=0 and <=65535. |
| 225 | * Return -1 if invalid. |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 226 | */ |
| 227 | int |
| 228 | a2port(const char *s) |
Ben Lindstrom | 19066a1 | 2001-04-12 23:39:26 +0000 | [diff] [blame] | 229 | { |
Damien Miller | 3dc71ad | 2009-01-28 16:31:22 +1100 | [diff] [blame] | 230 | long long port; |
| 231 | const char *errstr; |
Ben Lindstrom | 19066a1 | 2001-04-12 23:39:26 +0000 | [diff] [blame] | 232 | |
Damien Miller | 3dc71ad | 2009-01-28 16:31:22 +1100 | [diff] [blame] | 233 | port = strtonum(s, 0, 65535, &errstr); |
| 234 | if (errstr != NULL) |
| 235 | return -1; |
| 236 | return (int)port; |
Ben Lindstrom | 19066a1 | 2001-04-12 23:39:26 +0000 | [diff] [blame] | 237 | } |
| 238 | |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 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) { |
Damien Miller | 7b58e80 | 2005-12-13 19:33:19 +1100 | [diff] [blame] | 247 | *remote = SSH_TUNID_ANY; |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 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); |
Damien Miller | 7b58e80 | 2005-12-13 19:33:19 +1100 | [diff] [blame] | 257 | return (*remote == SSH_TUNID_ERR ? *remote : tun); |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | if (strcasecmp(s, "any") == 0) |
Damien Miller | 7b58e80 | 2005-12-13 19:33:19 +1100 | [diff] [blame] | 261 | return (SSH_TUNID_ANY); |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 262 | |
Damien Miller | 7b58e80 | 2005-12-13 19:33:19 +1100 | [diff] [blame] | 263 | tun = strtonum(s, 0, SSH_TUNID_MAX, &errstr); |
| 264 | if (errstr != NULL) |
| 265 | return (SSH_TUNID_ERR); |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 266 | |
| 267 | return (tun); |
| 268 | } |
| 269 | |
Ben Lindstrom | 1bda4c8 | 2001-06-05 19:59:08 +0000 | [diff] [blame] | 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 | |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 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) |
Ben Lindstrom | 1bda4c8 | 2001-06-05 19:59:08 +0000 | [diff] [blame] | 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--; |
Damien Miller | 69b7203 | 2006-03-26 14:02:35 +1100 | [diff] [blame] | 321 | break; |
Ben Lindstrom | 1bda4c8 | 2001-06-05 19:59:08 +0000 | [diff] [blame] | 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 | |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 353 | /* |
Darren Tucker | da34553 | 2006-07-10 23:04:19 +1000 | [diff] [blame] | 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 | /* |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 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; |
Darren Tucker | 47eede7 | 2005-03-14 23:08:12 +1100 | [diff] [blame] | 398 | |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 399 | case ':': |
| 400 | case '/': |
| 401 | *s = '\0'; /* terminate */ |
| 402 | *cp = s + 1; |
| 403 | break; |
Darren Tucker | 47eede7 | 2005-03-14 23:08:12 +1100 | [diff] [blame] | 404 | |
Damien Miller | f91ee4c | 2005-03-01 21:24:33 +1100 | [diff] [blame] | 405 | default: |
| 406 | return NULL; |
| 407 | } |
| 408 | |
| 409 | return old; |
| 410 | } |
| 411 | |
Ben Lindstrom | 4529b70 | 2001-05-03 23:39:53 +0000 | [diff] [blame] | 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 | |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 445 | /* function to assist building execv() arguments */ |
Ben Lindstrom | 387c472 | 2001-05-08 20:27:25 +0000 | [diff] [blame] | 446 | void |
| 447 | addargs(arglist *args, char *fmt, ...) |
| 448 | { |
| 449 | va_list ap; |
Damien Miller | 3eec6b7 | 2006-01-31 21:49:27 +1100 | [diff] [blame] | 450 | char *cp; |
Darren Tucker | c7a6fc4 | 2004-08-13 21:18:00 +1000 | [diff] [blame] | 451 | u_int nalloc; |
Damien Miller | 3eec6b7 | 2006-01-31 21:49:27 +1100 | [diff] [blame] | 452 | int r; |
Ben Lindstrom | 387c472 | 2001-05-08 20:27:25 +0000 | [diff] [blame] | 453 | |
| 454 | va_start(ap, fmt); |
Damien Miller | 3eec6b7 | 2006-01-31 21:49:27 +1100 | [diff] [blame] | 455 | r = vasprintf(&cp, fmt, ap); |
Ben Lindstrom | 387c472 | 2001-05-08 20:27:25 +0000 | [diff] [blame] | 456 | va_end(ap); |
Damien Miller | 3eec6b7 | 2006-01-31 21:49:27 +1100 | [diff] [blame] | 457 | if (r == -1) |
| 458 | fatal("addargs: argument too long"); |
Ben Lindstrom | 387c472 | 2001-05-08 20:27:25 +0000 | [diff] [blame] | 459 | |
Darren Tucker | fb16b24 | 2003-09-22 21:04:23 +1000 | [diff] [blame] | 460 | nalloc = args->nalloc; |
Ben Lindstrom | 387c472 | 2001-05-08 20:27:25 +0000 | [diff] [blame] | 461 | if (args->list == NULL) { |
Darren Tucker | fb16b24 | 2003-09-22 21:04:23 +1000 | [diff] [blame] | 462 | nalloc = 32; |
Ben Lindstrom | 387c472 | 2001-05-08 20:27:25 +0000 | [diff] [blame] | 463 | args->num = 0; |
Darren Tucker | fb16b24 | 2003-09-22 21:04:23 +1000 | [diff] [blame] | 464 | } else if (args->num+2 >= nalloc) |
| 465 | nalloc *= 2; |
Ben Lindstrom | 387c472 | 2001-05-08 20:27:25 +0000 | [diff] [blame] | 466 | |
Damien Miller | 3681209 | 2006-03-26 14:22:47 +1100 | [diff] [blame] | 467 | args->list = xrealloc(args->list, nalloc, sizeof(char *)); |
Darren Tucker | fb16b24 | 2003-09-22 21:04:23 +1000 | [diff] [blame] | 468 | args->nalloc = nalloc; |
Damien Miller | 3eec6b7 | 2006-01-31 21:49:27 +1100 | [diff] [blame] | 469 | args->list[args->num++] = cp; |
Ben Lindstrom | 387c472 | 2001-05-08 20:27:25 +0000 | [diff] [blame] | 470 | args->list[args->num] = NULL; |
| 471 | } |
Darren Tucker | 22cc741 | 2004-12-06 22:47:41 +1100 | [diff] [blame] | 472 | |
Damien Miller | 3eec6b7 | 2006-01-31 21:49:27 +1100 | [diff] [blame] | 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 | |
Darren Tucker | 22cc741 | 2004-12-06 22:47:41 +1100 | [diff] [blame] | 507 | /* |
Damien Miller | 5fd38c0 | 2005-05-26 12:02:14 +1000 | [diff] [blame] | 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; |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 517 | u_int len, slash; |
Damien Miller | 5fd38c0 | 2005-05-26 12:02:14 +1000 | [diff] [blame] | 518 | |
| 519 | if (*filename != '~') |
| 520 | return (xstrdup(filename)); |
| 521 | filename++; |
| 522 | |
| 523 | path = strchr(filename, '/'); |
| 524 | if (path != NULL && path > filename) { /* ~user/path */ |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 525 | slash = path - filename; |
| 526 | if (slash > sizeof(user) - 1) |
Damien Miller | 5fd38c0 | 2005-05-26 12:02:14 +1000 | [diff] [blame] | 527 | fatal("tilde_expand_filename: ~username too long"); |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 528 | memcpy(user, filename, slash); |
| 529 | user[slash] = '\0'; |
Damien Miller | 5fd38c0 | 2005-05-26 12:02:14 +1000 | [diff] [blame] | 530 | if ((pw = getpwnam(user)) == NULL) |
| 531 | fatal("tilde_expand_filename: No such user %s", user); |
| 532 | } else if ((pw = getpwuid(uid)) == NULL) /* ~/path */ |
Darren Tucker | 7517b5b | 2008-06-13 14:48:59 +1000 | [diff] [blame] | 533 | fatal("tilde_expand_filename: No such uid %ld", (long)uid); |
Damien Miller | 5fd38c0 | 2005-05-26 12:02:14 +1000 | [diff] [blame] | 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 | /* |
Damien Miller | 6476cad | 2005-06-16 13:18:34 +1000 | [diff] [blame] | 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 |
Darren Tucker | bee73d5 | 2005-07-14 17:05:02 +1000 | [diff] [blame] | 556 | * be terminated by a NULL escape_char. Returns replaced string in memory |
Damien Miller | 6476cad | 2005-06-16 13:18:34 +1000 | [diff] [blame] | 557 | * allocated by xmalloc. |
| 558 | */ |
| 559 | char * |
| 560 | percent_expand(const char *string, ...) |
| 561 | { |
| 562 | #define EXPAND_MAX_KEYS 16 |
Darren Tucker | 70d8769 | 2010-01-08 18:49:16 +1100 | [diff] [blame] | 563 | u_int num_keys, i, j; |
Damien Miller | 6476cad | 2005-06-16 13:18:34 +1000 | [diff] [blame] | 564 | struct { |
| 565 | const char *key; |
| 566 | const char *repl; |
| 567 | } keys[EXPAND_MAX_KEYS]; |
Damien Miller | 6476cad | 2005-06-16 13:18:34 +1000 | [diff] [blame] | 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) |
Darren Tucker | 70d8769 | 2010-01-08 18:49:16 +1100 | [diff] [blame] | 579 | fatal("%s: NULL replacement", __func__); |
Damien Miller | 6476cad | 2005-06-16 13:18:34 +1000 | [diff] [blame] | 580 | } |
Darren Tucker | 70d8769 | 2010-01-08 18:49:16 +1100 | [diff] [blame] | 581 | if (num_keys == EXPAND_MAX_KEYS && va_arg(ap, char *) != NULL) |
| 582 | fatal("%s: too many keys", __func__); |
Damien Miller | 6476cad | 2005-06-16 13:18:34 +1000 | [diff] [blame] | 583 | va_end(ap); |
| 584 | |
Damien Miller | 6476cad | 2005-06-16 13:18:34 +1000 | [diff] [blame] | 585 | /* Expand string */ |
| 586 | *buf = '\0'; |
| 587 | for (i = 0; *string != '\0'; string++) { |
| 588 | if (*string != '%') { |
| 589 | append: |
| 590 | buf[i++] = *string; |
| 591 | if (i >= sizeof(buf)) |
Darren Tucker | 70d8769 | 2010-01-08 18:49:16 +1100 | [diff] [blame] | 592 | fatal("%s: string too long", __func__); |
Damien Miller | 6476cad | 2005-06-16 13:18:34 +1000 | [diff] [blame] | 593 | buf[i] = '\0'; |
| 594 | continue; |
| 595 | } |
| 596 | string++; |
Darren Tucker | 70d8769 | 2010-01-08 18:49:16 +1100 | [diff] [blame] | 597 | /* %% case */ |
Damien Miller | 6476cad | 2005-06-16 13:18:34 +1000 | [diff] [blame] | 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)) |
Darren Tucker | 70d8769 | 2010-01-08 18:49:16 +1100 | [diff] [blame] | 604 | fatal("%s: string too long", __func__); |
Damien Miller | 6476cad | 2005-06-16 13:18:34 +1000 | [diff] [blame] | 605 | break; |
| 606 | } |
| 607 | } |
| 608 | if (j >= num_keys) |
Darren Tucker | 70d8769 | 2010-01-08 18:49:16 +1100 | [diff] [blame] | 609 | fatal("%s: unknown key %%%c", __func__, *string); |
Damien Miller | 6476cad | 2005-06-16 13:18:34 +1000 | [diff] [blame] | 610 | } |
| 611 | return (xstrdup(buf)); |
| 612 | #undef EXPAND_MAX_KEYS |
| 613 | } |
| 614 | |
| 615 | /* |
Darren Tucker | 22cc741 | 2004-12-06 22:47:41 +1100 | [diff] [blame] | 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, |
Darren Tucker | f0f9098 | 2004-12-11 13:39:50 +1100 | [diff] [blame] | 621 | u_long *lineno) |
Darren Tucker | 22cc741 | 2004-12-06 22:47:41 +1100 | [diff] [blame] | 622 | { |
| 623 | while (fgets(buf, bufsz, f) != NULL) { |
Damien Miller | 3ca8b77 | 2007-01-05 16:24:47 +1100 | [diff] [blame] | 624 | if (buf[0] == '\0') |
| 625 | continue; |
Darren Tucker | 22cc741 | 2004-12-06 22:47:41 +1100 | [diff] [blame] | 626 | (*lineno)++; |
| 627 | if (buf[strlen(buf) - 1] == '\n' || feof(f)) { |
| 628 | return 0; |
| 629 | } else { |
Darren Tucker | f0f9098 | 2004-12-11 13:39:50 +1100 | [diff] [blame] | 630 | debug("%s: %s line %lu exceeds size limit", __func__, |
| 631 | filename, *lineno); |
Darren Tucker | 22cc741 | 2004-12-06 22:47:41 +1100 | [diff] [blame] | 632 | /* discard remainder of line */ |
Darren Tucker | 47eede7 | 2005-03-14 23:08:12 +1100 | [diff] [blame] | 633 | while (fgetc(f) != '\n' && !feof(f)) |
Darren Tucker | 22cc741 | 2004-12-06 22:47:41 +1100 | [diff] [blame] | 634 | ; /* nothing */ |
| 635 | } |
| 636 | } |
| 637 | return -1; |
| 638 | } |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 639 | |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 640 | int |
Damien Miller | 7b58e80 | 2005-12-13 19:33:19 +1100 | [diff] [blame] | 641 | tun_open(int tun, int mode) |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 642 | { |
Damien Miller | 62a31c9 | 2005-12-13 20:44:13 +1100 | [diff] [blame] | 643 | #if defined(CUSTOM_SYS_TUN_OPEN) |
| 644 | return (sys_tun_open(tun, mode)); |
Damien Miller | 2dcddbf | 2006-01-01 19:47:05 +1100 | [diff] [blame] | 645 | #elif defined(SSH_TUN_OPENBSD) |
Damien Miller | 7b58e80 | 2005-12-13 19:33:19 +1100 | [diff] [blame] | 646 | struct ifreq ifr; |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 647 | char name[100]; |
Damien Miller | 7b58e80 | 2005-12-13 19:33:19 +1100 | [diff] [blame] | 648 | int fd = -1, sock; |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 649 | |
Damien Miller | 7b58e80 | 2005-12-13 19:33:19 +1100 | [diff] [blame] | 650 | /* Open the tunnel device */ |
| 651 | if (tun <= SSH_TUNID_MAX) { |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 652 | snprintf(name, sizeof(name), "/dev/tun%d", tun); |
Damien Miller | 7b58e80 | 2005-12-13 19:33:19 +1100 | [diff] [blame] | 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; |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 659 | } |
| 660 | } else { |
Damien Miller | a210d52 | 2006-01-02 23:40:30 +1100 | [diff] [blame] | 661 | debug("%s: invalid tunnel %u", __func__, tun); |
Damien Miller | 7b58e80 | 2005-12-13 19:33:19 +1100 | [diff] [blame] | 662 | return (-1); |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 663 | } |
Damien Miller | 7b58e80 | 2005-12-13 19:33:19 +1100 | [diff] [blame] | 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; |
Damien Miller | a1d9a18 | 2006-01-02 23:41:21 +1100 | [diff] [blame] | 679 | |
| 680 | /* Set interface mode */ |
| 681 | ifr.ifr_flags &= ~IFF_UP; |
| 682 | if (mode == SSH_TUNMODE_ETHERNET) |
Damien Miller | 7b58e80 | 2005-12-13 19:33:19 +1100 | [diff] [blame] | 683 | ifr.ifr_flags |= IFF_LINK0; |
Damien Miller | a1d9a18 | 2006-01-02 23:41:21 +1100 | [diff] [blame] | 684 | else |
| 685 | ifr.ifr_flags &= ~IFF_LINK0; |
| 686 | if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1) |
| 687 | goto failed; |
| 688 | |
| 689 | /* Bring interface up */ |
Damien Miller | 7b58e80 | 2005-12-13 19:33:19 +1100 | [diff] [blame] | 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)); |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 704 | return (-1); |
Damien Miller | 62a31c9 | 2005-12-13 20:44:13 +1100 | [diff] [blame] | 705 | #else |
| 706 | error("Tunnel interfaces are not supported on this platform"); |
| 707 | return (-1); |
| 708 | #endif |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 709 | } |
| 710 | |
Darren Tucker | ce321d8 | 2005-10-03 18:11:24 +1000 | [diff] [blame] | 711 | void |
| 712 | sanitise_stdfd(void) |
| 713 | { |
Damien Miller | 72c5b7d | 2006-01-06 14:50:44 +1100 | [diff] [blame] | 714 | int nullfd, dupfd; |
Darren Tucker | ce321d8 | 2005-10-03 18:11:24 +1000 | [diff] [blame] | 715 | |
Damien Miller | 72c5b7d | 2006-01-06 14:50:44 +1100 | [diff] [blame] | 716 | if ((nullfd = dupfd = open(_PATH_DEVNULL, O_RDWR)) == -1) { |
Damien Miller | 9eab956 | 2009-02-22 08:47:02 +1100 | [diff] [blame] | 717 | fprintf(stderr, "Couldn't open /dev/null: %s\n", |
| 718 | strerror(errno)); |
Darren Tucker | ce321d8 | 2005-10-03 18:11:24 +1000 | [diff] [blame] | 719 | exit(1); |
| 720 | } |
Damien Miller | 72c5b7d | 2006-01-06 14:50:44 +1100 | [diff] [blame] | 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) { |
Damien Miller | 9eab956 | 2009-02-22 08:47:02 +1100 | [diff] [blame] | 726 | fprintf(stderr, "dup2: %s\n", strerror(errno)); |
Darren Tucker | ce321d8 | 2005-10-03 18:11:24 +1000 | [diff] [blame] | 727 | exit(1); |
| 728 | } |
Darren Tucker | ce321d8 | 2005-10-03 18:11:24 +1000 | [diff] [blame] | 729 | } |
| 730 | if (nullfd > 2) |
| 731 | close(nullfd); |
| 732 | } |
| 733 | |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 734 | char * |
Damien Miller | 3f94188 | 2006-03-31 23:13:02 +1100 | [diff] [blame] | 735 | tohex(const void *vp, size_t l) |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 736 | { |
Damien Miller | 3f94188 | 2006-03-31 23:13:02 +1100 | [diff] [blame] | 737 | const u_char *p = (const u_char *)vp; |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 738 | char b[3], *r; |
Damien Miller | 3f94188 | 2006-03-31 23:13:02 +1100 | [diff] [blame] | 739 | size_t i, hl; |
| 740 | |
| 741 | if (l > 65536) |
| 742 | return xstrdup("tohex: length > 65536"); |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 743 | |
| 744 | hl = l * 2 + 1; |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 745 | r = xcalloc(1, hl); |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 746 | for (i = 0; i < l; i++) { |
Damien Miller | 3f94188 | 2006-03-31 23:13:02 +1100 | [diff] [blame] | 747 | snprintf(b, sizeof(b), "%02x", p[i]); |
Damien Miller | 1339002 | 2005-07-06 09:44:19 +1000 | [diff] [blame] | 748 | strlcat(r, b, hl); |
| 749 | } |
| 750 | return (r); |
| 751 | } |
| 752 | |
Damien Miller | 3f94188 | 2006-03-31 23:13:02 +1100 | [diff] [blame] | 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 | } |
Darren Tucker | 3fc464e | 2008-06-13 06:42:45 +1000 | [diff] [blame] | 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 | |
Damien Miller | 04ee0f8 | 2009-11-18 17:48:30 +1100 | [diff] [blame] | 852 | void |
| 853 | sock_set_v6only(int s) |
| 854 | { |
| 855 | #ifdef IPV6_V6ONLY |
| 856 | int on = 1; |
| 857 | |
| 858 | debug3("%s: set socket %d IPV6_V6ONLY", __func__, s); |
| 859 | if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on)) == -1) |
| 860 | error("setsockopt IPV6_V6ONLY: %s", strerror(errno)); |
| 861 | #endif |
| 862 | } |