Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2005 Reyk Floeter <reyk@openbsd.org> |
| 3 | * |
| 4 | * Permission to use, copy, modify, and distribute this software for any |
| 5 | * purpose with or without fee is hereby granted, provided that the above |
| 6 | * copyright notice and this permission notice appear in all copies. |
| 7 | * |
| 8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 15 | */ |
| 16 | |
| 17 | #include "includes.h" |
| 18 | |
Damien Miller | a1738e4 | 2006-07-10 21:33:04 +1000 | [diff] [blame] | 19 | #include <sys/types.h> |
Tim Rice | 4b23f7c | 2006-03-14 22:09:50 -0800 | [diff] [blame] | 20 | #include <sys/ioctl.h> |
Darren Tucker | 46aa3e0 | 2006-09-02 15:32:40 +1000 | [diff] [blame] | 21 | |
Darren Tucker | 686852f | 2006-07-12 19:05:56 +1000 | [diff] [blame] | 22 | #include <netinet/in.h> |
Darren Tucker | 46aa3e0 | 2006-09-02 15:32:40 +1000 | [diff] [blame] | 23 | #include <arpa/inet.h> |
Tim Rice | 4b23f7c | 2006-03-14 22:09:50 -0800 | [diff] [blame] | 24 | #include <netinet/ip.h> |
| 25 | |
Darren Tucker | 2c1a02a | 2006-07-12 22:40:50 +1000 | [diff] [blame] | 26 | #include <errno.h> |
Damien Miller | a1738e4 | 2006-07-10 21:33:04 +1000 | [diff] [blame] | 27 | #include <fcntl.h> |
Darren Tucker | e7eec90 | 2006-08-05 15:47:26 +1000 | [diff] [blame] | 28 | #include <stdarg.h> |
Damien Miller | b8fe89c | 2006-07-24 14:51:00 +1000 | [diff] [blame] | 29 | #include <string.h> |
| 30 | #include <unistd.h> |
Damien Miller | a1738e4 | 2006-07-10 21:33:04 +1000 | [diff] [blame] | 31 | |
Damien Miller | 9417831 | 2008-05-19 15:28:35 +1000 | [diff] [blame] | 32 | #include "openbsd-compat/sys-queue.h" |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 33 | #include "log.h" |
| 34 | #include "misc.h" |
Damien Miller | 0cdc5a3 | 2015-01-15 02:35:33 +1100 | [diff] [blame] | 35 | #include "sshbuf.h" |
Damien Miller | 75bb664 | 2006-08-05 14:07:20 +1000 | [diff] [blame] | 36 | #include "channels.h" |
Damien Miller | 0cdc5a3 | 2015-01-15 02:35:33 +1100 | [diff] [blame] | 37 | #include "ssherr.h" |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 38 | |
| 39 | /* |
Damien Miller | 6eee79f | 2017-10-25 13:22:29 +1100 | [diff] [blame] | 40 | * This file contains various portability code for network support, |
| 41 | * including tun/tap forwarding and routing domains. |
| 42 | */ |
| 43 | |
Damien Miller | ce1cca3 | 2017-10-25 13:47:59 +1100 | [diff] [blame] | 44 | #if defined(SYS_RDOMAIN_LINUX) || defined(SSH_TUN_LINUX) |
| 45 | #include <linux/if.h> |
| 46 | #endif |
| 47 | |
| 48 | #if defined(SYS_RDOMAIN_LINUX) |
| 49 | char * |
| 50 | sys_get_rdomain(int fd) |
| 51 | { |
| 52 | char dev[IFNAMSIZ + 1]; |
| 53 | socklen_t len = sizeof(dev) - 1; |
| 54 | |
| 55 | if (getsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, dev, &len) == -1) { |
| 56 | error("%s: cannot determine VRF for fd=%d : %s", |
| 57 | __func__, fd, strerror(errno)); |
| 58 | return NULL; |
| 59 | } |
| 60 | dev[len] = '\0'; |
| 61 | return strdup(dev); |
| 62 | } |
| 63 | |
| 64 | int |
| 65 | sys_set_rdomain(int fd, const char *name) |
| 66 | { |
| 67 | if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, |
| 68 | name, strlen(name)) == -1) { |
| 69 | error("%s: setsockopt(%d, SO_BINDTODEVICE, %s): %s", |
| 70 | __func__, fd, name, strerror(errno)); |
| 71 | return -1; |
| 72 | } |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | int |
Damien Miller | 2de5c6b | 2017-10-27 08:42:33 +1100 | [diff] [blame] | 77 | sys_valid_rdomain(const char *name) |
Damien Miller | ce1cca3 | 2017-10-25 13:47:59 +1100 | [diff] [blame] | 78 | { |
Damien Miller | 97c5aaf | 2017-10-25 14:09:56 +1100 | [diff] [blame] | 79 | int fd; |
| 80 | |
| 81 | /* |
| 82 | * This is a pretty crappy way to test. It would be better to |
| 83 | * check whether "name" represents a VRF device, but apparently |
| 84 | * that requires an rtnetlink transaction. |
| 85 | */ |
| 86 | if ((fd = socket(AF_INET, SOCK_STREAM, 0)) == -1) |
| 87 | return 0; |
| 88 | if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, |
| 89 | name, strlen(name)) == -1) { |
| 90 | close(fd); |
| 91 | return 0; |
| 92 | } |
| 93 | close(fd); |
| 94 | return 1; |
Damien Miller | ce1cca3 | 2017-10-25 13:47:59 +1100 | [diff] [blame] | 95 | } |
| 96 | #elif defined(SYS_RDOMAIN_XXX) |
Damien Miller | 6eee79f | 2017-10-25 13:22:29 +1100 | [diff] [blame] | 97 | /* XXX examples */ |
| 98 | char * |
| 99 | sys_get_rdomain(int fd) |
| 100 | { |
| 101 | return NULL; |
| 102 | } |
| 103 | |
| 104 | int |
| 105 | sys_set_rdomain(int fd, const char *name) |
| 106 | { |
| 107 | return -1; |
| 108 | } |
| 109 | |
| 110 | int |
| 111 | valid_rdomain(const char *name) |
| 112 | { |
| 113 | return 0; |
| 114 | } |
| 115 | |
| 116 | void |
| 117 | sys_set_process_rdomain(const char *name) |
| 118 | { |
| 119 | fatal("%s: not supported", __func__); |
| 120 | } |
| 121 | #endif /* defined(SYS_RDOMAIN_XXX) */ |
| 122 | |
| 123 | /* |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 124 | * This is the portable version of the SSH tunnel forwarding, it |
| 125 | * uses some preprocessor definitions for various platform-specific |
| 126 | * settings. |
| 127 | * |
| 128 | * SSH_TUN_LINUX Use the (newer) Linux tun/tap device |
Darren Tucker | 3eb4834 | 2006-06-23 21:05:12 +1000 | [diff] [blame] | 129 | * SSH_TUN_FREEBSD Use the FreeBSD tun/tap device |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 130 | * SSH_TUN_COMPAT_AF Translate the OpenBSD address family |
| 131 | * SSH_TUN_PREPEND_AF Prepend/remove the address family |
| 132 | */ |
| 133 | |
| 134 | /* |
| 135 | * System-specific tunnel open function |
| 136 | */ |
| 137 | |
| 138 | #if defined(SSH_TUN_LINUX) |
| 139 | #include <linux/if_tun.h> |
| 140 | |
| 141 | int |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 142 | sys_tun_open(int tun, int mode, char **ifname) |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 143 | { |
| 144 | struct ifreq ifr; |
| 145 | int fd = -1; |
| 146 | const char *name = NULL; |
| 147 | |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 148 | if (ifname != NULL) |
| 149 | *ifname = NULL; |
| 150 | |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 151 | if ((fd = open("/dev/net/tun", O_RDWR)) == -1) { |
| 152 | debug("%s: failed to open tunnel control interface: %s", |
| 153 | __func__, strerror(errno)); |
| 154 | return (-1); |
| 155 | } |
| 156 | |
Darren Tucker | c20dccb | 2016-08-02 09:44:25 +1000 | [diff] [blame] | 157 | bzero(&ifr, sizeof(ifr)); |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 158 | |
| 159 | if (mode == SSH_TUNMODE_ETHERNET) { |
| 160 | ifr.ifr_flags = IFF_TAP; |
| 161 | name = "tap%d"; |
| 162 | } else { |
| 163 | ifr.ifr_flags = IFF_TUN; |
| 164 | name = "tun%d"; |
| 165 | } |
| 166 | ifr.ifr_flags |= IFF_NO_PI; |
| 167 | |
| 168 | if (tun != SSH_TUNID_ANY) { |
| 169 | if (tun > SSH_TUNID_MAX) { |
| 170 | debug("%s: invalid tunnel id %x: %s", __func__, |
| 171 | tun, strerror(errno)); |
| 172 | goto failed; |
| 173 | } |
| 174 | snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), name, tun); |
| 175 | } |
| 176 | |
| 177 | if (ioctl(fd, TUNSETIFF, &ifr) == -1) { |
| 178 | debug("%s: failed to configure tunnel (mode %d): %s", __func__, |
| 179 | mode, strerror(errno)); |
| 180 | goto failed; |
| 181 | } |
| 182 | |
| 183 | if (tun == SSH_TUNID_ANY) |
| 184 | debug("%s: tunnel mode %d fd %d", __func__, mode, fd); |
| 185 | else |
| 186 | debug("%s: %s mode %d fd %d", __func__, ifr.ifr_name, mode, fd); |
| 187 | |
Damien Miller | cfb1d9b | 2018-04-13 13:38:06 +1000 | [diff] [blame] | 188 | if (ifname != NULL && (*ifname = strdup(ifr.ifr_name)) == NULL) |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 189 | goto failed; |
| 190 | |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 191 | return (fd); |
| 192 | |
| 193 | failed: |
| 194 | close(fd); |
| 195 | return (-1); |
| 196 | } |
| 197 | #endif /* SSH_TUN_LINUX */ |
| 198 | |
Damien Miller | 2dcddbf | 2006-01-01 19:47:05 +1100 | [diff] [blame] | 199 | #ifdef SSH_TUN_FREEBSD |
| 200 | #include <sys/socket.h> |
| 201 | #include <net/if.h> |
Darren Tucker | 3eb4834 | 2006-06-23 21:05:12 +1000 | [diff] [blame] | 202 | |
| 203 | #ifdef HAVE_NET_IF_TUN_H |
Damien Miller | 2dcddbf | 2006-01-01 19:47:05 +1100 | [diff] [blame] | 204 | #include <net/if_tun.h> |
Darren Tucker | 3eb4834 | 2006-06-23 21:05:12 +1000 | [diff] [blame] | 205 | #endif |
Damien Miller | 2dcddbf | 2006-01-01 19:47:05 +1100 | [diff] [blame] | 206 | |
| 207 | int |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 208 | sys_tun_open(int tun, int mode, char **ifname) |
Damien Miller | 2dcddbf | 2006-01-01 19:47:05 +1100 | [diff] [blame] | 209 | { |
| 210 | struct ifreq ifr; |
| 211 | char name[100]; |
| 212 | int fd = -1, sock, flag; |
| 213 | const char *tunbase = "tun"; |
| 214 | |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 215 | if (ifname != NULL) |
| 216 | *ifname = NULL; |
| 217 | |
Damien Miller | 2dcddbf | 2006-01-01 19:47:05 +1100 | [diff] [blame] | 218 | if (mode == SSH_TUNMODE_ETHERNET) { |
| 219 | #ifdef SSH_TUN_NO_L2 |
| 220 | debug("%s: no layer 2 tunnelling support", __func__); |
| 221 | return (-1); |
| 222 | #else |
| 223 | tunbase = "tap"; |
| 224 | #endif |
| 225 | } |
| 226 | |
| 227 | /* Open the tunnel device */ |
| 228 | if (tun <= SSH_TUNID_MAX) { |
| 229 | snprintf(name, sizeof(name), "/dev/%s%d", tunbase, tun); |
| 230 | fd = open(name, O_RDWR); |
| 231 | } else if (tun == SSH_TUNID_ANY) { |
| 232 | for (tun = 100; tun >= 0; tun--) { |
| 233 | snprintf(name, sizeof(name), "/dev/%s%d", |
| 234 | tunbase, tun); |
| 235 | if ((fd = open(name, O_RDWR)) >= 0) |
| 236 | break; |
| 237 | } |
| 238 | } else { |
| 239 | debug("%s: invalid tunnel %u\n", __func__, tun); |
| 240 | return (-1); |
| 241 | } |
| 242 | |
| 243 | if (fd < 0) { |
| 244 | debug("%s: %s open failed: %s", __func__, name, |
| 245 | strerror(errno)); |
| 246 | return (-1); |
| 247 | } |
| 248 | |
| 249 | /* Turn on tunnel headers */ |
| 250 | flag = 1; |
| 251 | #if defined(TUNSIFHEAD) && !defined(SSH_TUN_PREPEND_AF) |
| 252 | if (mode != SSH_TUNMODE_ETHERNET && |
| 253 | ioctl(fd, TUNSIFHEAD, &flag) == -1) { |
| 254 | debug("%s: ioctl(%d, TUNSIFHEAD, 1): %s", __func__, fd, |
| 255 | strerror(errno)); |
| 256 | close(fd); |
| 257 | } |
| 258 | #endif |
| 259 | |
| 260 | debug("%s: %s mode %d fd %d", __func__, name, mode, fd); |
| 261 | |
| 262 | /* Set the tunnel device operation mode */ |
| 263 | snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%s%d", tunbase, tun); |
| 264 | if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) == -1) |
| 265 | goto failed; |
| 266 | |
| 267 | if (ioctl(sock, SIOCGIFFLAGS, &ifr) == -1) |
| 268 | goto failed; |
Damien Miller | 2c4b13a | 2010-08-10 12:47:40 +1000 | [diff] [blame] | 269 | if ((ifr.ifr_flags & IFF_UP) == 0) { |
| 270 | ifr.ifr_flags |= IFF_UP; |
| 271 | if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1) |
| 272 | goto failed; |
| 273 | } |
Damien Miller | 2dcddbf | 2006-01-01 19:47:05 +1100 | [diff] [blame] | 274 | |
Damien Miller | cfb1d9b | 2018-04-13 13:38:06 +1000 | [diff] [blame] | 275 | if (ifname != NULL && (*ifname = strdup(ifr.ifr_name)) == NULL) |
djm@openbsd.org | b7548b1 | 2017-10-23 05:08:00 +0000 | [diff] [blame] | 276 | goto failed; |
| 277 | |
Damien Miller | 2dcddbf | 2006-01-01 19:47:05 +1100 | [diff] [blame] | 278 | close(sock); |
| 279 | return (fd); |
| 280 | |
| 281 | failed: |
| 282 | if (fd >= 0) |
| 283 | close(fd); |
| 284 | if (sock >= 0) |
| 285 | close(sock); |
| 286 | debug("%s: failed to set %s mode %d: %s", __func__, name, |
| 287 | mode, strerror(errno)); |
| 288 | return (-1); |
| 289 | } |
| 290 | #endif /* SSH_TUN_FREEBSD */ |
| 291 | |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 292 | /* |
| 293 | * System-specific channel filters |
| 294 | */ |
| 295 | |
| 296 | #if defined(SSH_TUN_FILTER) |
Damien Miller | c78e6ee | 2017-07-21 14:38:16 +1000 | [diff] [blame] | 297 | /* |
| 298 | * The tunnel forwarding protocol prepends the address family of forwarded |
| 299 | * IP packets using OpenBSD's numbers. |
| 300 | */ |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 301 | #define OPENBSD_AF_INET 2 |
| 302 | #define OPENBSD_AF_INET6 24 |
| 303 | |
| 304 | int |
Damien Miller | 871f1e4 | 2017-09-12 18:01:35 +1000 | [diff] [blame] | 305 | sys_tun_infilter(struct ssh *ssh, struct Channel *c, char *buf, int _len) |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 306 | { |
Damien Miller | c78e6ee | 2017-07-21 14:38:16 +1000 | [diff] [blame] | 307 | int r; |
| 308 | size_t len; |
| 309 | char *ptr = buf; |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 310 | #if defined(SSH_TUN_PREPEND_AF) |
| 311 | char rbuf[CHAN_RBUF]; |
Damien Miller | c78e6ee | 2017-07-21 14:38:16 +1000 | [diff] [blame] | 312 | struct ip iph; |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 313 | #endif |
Damien Miller | c78e6ee | 2017-07-21 14:38:16 +1000 | [diff] [blame] | 314 | #if defined(SSH_TUN_PREPEND_AF) || defined(SSH_TUN_COMPAT_AF) |
| 315 | u_int32_t af; |
| 316 | #endif |
| 317 | |
| 318 | /* XXX update channel input filter API to use unsigned length */ |
| 319 | if (_len < 0) |
| 320 | return -1; |
| 321 | len = _len; |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 322 | |
| 323 | #if defined(SSH_TUN_PREPEND_AF) |
Damien Miller | c78e6ee | 2017-07-21 14:38:16 +1000 | [diff] [blame] | 324 | if (len <= sizeof(iph) || len > sizeof(rbuf) - 4) |
| 325 | return -1; |
| 326 | /* Determine address family from packet IP header. */ |
| 327 | memcpy(&iph, buf, sizeof(iph)); |
| 328 | af = iph.ip_v == 6 ? OPENBSD_AF_INET6 : OPENBSD_AF_INET; |
| 329 | /* Prepend address family to packet using OpenBSD constants */ |
| 330 | memcpy(rbuf + 4, buf, len); |
| 331 | len += 4; |
| 332 | POKE_U32(rbuf, af); |
| 333 | ptr = rbuf; |
| 334 | #elif defined(SSH_TUN_COMPAT_AF) |
| 335 | /* Convert existing address family header to OpenBSD value */ |
| 336 | if (len <= 4) |
| 337 | return -1; |
| 338 | af = PEEK_U32(buf); |
| 339 | /* Put it back */ |
| 340 | POKE_U32(buf, af == AF_INET6 ? OPENBSD_AF_INET6 : OPENBSD_AF_INET); |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 341 | #endif |
Damien Miller | 2dcddbf | 2006-01-01 19:47:05 +1100 | [diff] [blame] | 342 | |
Damien Miller | 871f1e4 | 2017-09-12 18:01:35 +1000 | [diff] [blame] | 343 | if ((r = sshbuf_put_string(c->input, ptr, len)) != 0) |
Damien Miller | 0cdc5a3 | 2015-01-15 02:35:33 +1100 | [diff] [blame] | 344 | fatal("%s: buffer error: %s", __func__, ssh_err(r)); |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 345 | return (0); |
| 346 | } |
| 347 | |
| 348 | u_char * |
Damien Miller | 871f1e4 | 2017-09-12 18:01:35 +1000 | [diff] [blame] | 349 | sys_tun_outfilter(struct ssh *ssh, struct Channel *c, |
| 350 | u_char **data, size_t *dlen) |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 351 | { |
| 352 | u_char *buf; |
Damien Miller | c78e6ee | 2017-07-21 14:38:16 +1000 | [diff] [blame] | 353 | u_int32_t af; |
Damien Miller | 0cdc5a3 | 2015-01-15 02:35:33 +1100 | [diff] [blame] | 354 | int r; |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 355 | |
Damien Miller | bc42cc6 | 2015-01-15 03:08:29 +1100 | [diff] [blame] | 356 | /* XXX new API is incompatible with this signature. */ |
Damien Miller | 871f1e4 | 2017-09-12 18:01:35 +1000 | [diff] [blame] | 357 | if ((r = sshbuf_get_string(c->output, data, dlen)) != 0) |
Damien Miller | 0cdc5a3 | 2015-01-15 02:35:33 +1100 | [diff] [blame] | 358 | fatal("%s: buffer error: %s", __func__, ssh_err(r)); |
Damien Miller | c78e6ee | 2017-07-21 14:38:16 +1000 | [diff] [blame] | 359 | if (*dlen < sizeof(af)) |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 360 | return (NULL); |
| 361 | buf = *data; |
| 362 | |
| 363 | #if defined(SSH_TUN_PREPEND_AF) |
Damien Miller | c78e6ee | 2017-07-21 14:38:16 +1000 | [diff] [blame] | 364 | /* skip address family */ |
| 365 | *dlen -= sizeof(af); |
| 366 | buf = *data + sizeof(af); |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 367 | #elif defined(SSH_TUN_COMPAT_AF) |
Damien Miller | c78e6ee | 2017-07-21 14:38:16 +1000 | [diff] [blame] | 368 | /* translate address family */ |
| 369 | af = (PEEK_U32(buf) == OPENBSD_AF_INET6) ? AF_INET6 : AF_INET; |
| 370 | POKE_U32(buf, af); |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 371 | #endif |
Damien Miller | 598bbc2 | 2005-12-31 16:33:36 +1100 | [diff] [blame] | 372 | return (buf); |
| 373 | } |
| 374 | #endif /* SSH_TUN_FILTER */ |