jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 1 | /* |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 2 | * TUN interface functions. |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 3 | * Copyright (C) 2002, 2003, 2004 Mondru AB. |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 4 | * |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 5 | * The contents of this file may be used under the terms of the GNU |
| 6 | * General Public License Version 2, provided that the above copyright |
| 7 | * notice and this permission notice is included in all copies or |
| 8 | * substantial portions of the software. |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 9 | * |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 10 | */ |
| 11 | |
| 12 | /* |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 13 | * tun.c: Contains all TUN functionality. Is able to handle multiple |
| 14 | * tunnels in the same program. Each tunnel is identified by the struct, |
| 15 | * which is passed to functions. |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 16 | * |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 17 | */ |
| 18 | |
| 19 | |
| 20 | #include <syslog.h> |
| 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <sys/types.h> |
| 24 | #include <sys/socket.h> |
| 25 | #include <netinet/in.h> |
| 26 | #include <arpa/inet.h> |
| 27 | #include <sys/stat.h> |
| 28 | #include <sys/time.h> |
| 29 | #include <unistd.h> |
| 30 | #include <string.h> |
| 31 | #include <errno.h> |
| 32 | #include <fcntl.h> |
| 33 | |
| 34 | #include <stdio.h> |
| 35 | #include <fcntl.h> |
| 36 | #include <unistd.h> |
| 37 | #include <sys/time.h> |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 38 | #include <sys/ioctl.h> |
| 39 | #include <sys/socket.h> |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 40 | #include <errno.h> |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 41 | #include <net/route.h> |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 42 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 43 | #if defined(__linux__) |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 44 | #include <linux/if.h> |
| 45 | #include <linux/if_tun.h> |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 46 | #include <linux/netlink.h> |
| 47 | #include <linux/rtnetlink.h> |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 48 | |
| 49 | #elif defined (__FreeBSD__) |
| 50 | #include <net/if.h> |
| 51 | #include <net/if_tun.h> |
| 52 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 53 | #elif defined (__APPLE__) |
| 54 | #include <net/if.h> |
| 55 | |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 56 | #elif defined (__sun__) |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 57 | #include <stropts.h> |
| 58 | #include <sys/sockio.h> |
| 59 | #include <net/if.h> |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 60 | #include <net/if_tun.h> |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 61 | /*#include "sun_if_tun.h"*/ |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 62 | |
| 63 | #else |
| 64 | #error "Unknown platform!" |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 65 | #endif |
| 66 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 67 | |
| 68 | #include "tun.h" |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 69 | #include "syserr.h" |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 70 | |
| 71 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 72 | #if defined(__linux__) |
| 73 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 74 | int tun_nlattr(struct nlmsghdr *n, int nsize, int type, void *d, int dlen) |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 75 | { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 76 | int len = RTA_LENGTH(dlen); |
| 77 | int alen = NLMSG_ALIGN(n->nlmsg_len); |
| 78 | struct rtattr *rta = (struct rtattr*) (((void*)n) + alen); |
| 79 | if (alen + len > nsize) |
| 80 | return -1; |
| 81 | rta->rta_len = len; |
| 82 | rta->rta_type = type; |
| 83 | memcpy(RTA_DATA(rta), d, dlen); |
| 84 | n->nlmsg_len = alen + len; |
| 85 | return 0; |
| 86 | } |
| 87 | |
Emmanuel Bretelle | 4e56c83 | 2010-09-07 20:06:12 +0200 | [diff] [blame] | 88 | int tun_gifindex(struct tun_t *this, __u32 *index) { |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 89 | struct ifreq ifr; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 90 | int fd; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 91 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 92 | memset (&ifr, '\0', sizeof (ifr)); |
| 93 | ifr.ifr_addr.sa_family = AF_INET; |
| 94 | ifr.ifr_dstaddr.sa_family = AF_INET; |
| 95 | ifr.ifr_netmask.sa_family = AF_INET; |
| 96 | strncpy(ifr.ifr_name, this->devname, IFNAMSIZ); |
| 97 | ifr.ifr_name[IFNAMSIZ-1] = 0; /* Make sure to terminate */ |
| 98 | if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| 99 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 100 | "socket() failed"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 101 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 102 | if (ioctl(fd, SIOCGIFINDEX, &ifr)) { |
| 103 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 104 | "ioctl() failed"); |
| 105 | close(fd); |
| 106 | return -1; |
| 107 | } |
| 108 | close(fd); |
| 109 | *index = ifr.ifr_ifindex; |
| 110 | return 0; |
| 111 | } |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 112 | #endif |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 113 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 114 | int tun_sifflags(struct tun_t *this, int flags) { |
| 115 | struct ifreq ifr; |
| 116 | int fd; |
| 117 | |
| 118 | memset (&ifr, '\0', sizeof (ifr)); |
| 119 | ifr.ifr_flags = flags; |
| 120 | strncpy(ifr.ifr_name, this->devname, IFNAMSIZ); |
| 121 | ifr.ifr_name[IFNAMSIZ-1] = 0; /* Make sure to terminate */ |
| 122 | if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| 123 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 124 | "socket() failed"); |
| 125 | } |
| 126 | if (ioctl(fd, SIOCSIFFLAGS, &ifr)) { |
| 127 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 128 | "ioctl(SIOCSIFFLAGS) failed"); |
| 129 | close(fd); |
| 130 | return -1; |
| 131 | } |
| 132 | close(fd); |
| 133 | return 0; |
| 134 | } |
| 135 | |
| 136 | |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 137 | /* Currently unused |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 138 | int tun_addroute2(struct tun_t *this, |
| 139 | struct in_addr *dst, |
| 140 | struct in_addr *gateway, |
| 141 | struct in_addr *mask) { |
| 142 | |
| 143 | struct { |
| 144 | struct nlmsghdr n; |
| 145 | struct rtmsg r; |
| 146 | char buf[TUN_NLBUFSIZE]; |
| 147 | } req; |
| 148 | |
| 149 | struct sockaddr_nl local; |
| 150 | int addr_len; |
| 151 | int fd; |
| 152 | int status; |
| 153 | struct sockaddr_nl nladdr; |
| 154 | struct iovec iov; |
| 155 | struct msghdr msg; |
| 156 | |
| 157 | memset(&req, 0, sizeof(req)); |
| 158 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
| 159 | req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE; |
| 160 | req.n.nlmsg_type = RTM_NEWROUTE; |
| 161 | req.r.rtm_family = AF_INET; |
| 162 | req.r.rtm_table = RT_TABLE_MAIN; |
| 163 | req.r.rtm_protocol = RTPROT_BOOT; |
| 164 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
| 165 | req.r.rtm_type = RTN_UNICAST; |
| 166 | tun_nlattr(&req.n, sizeof(req), RTA_DST, dst, 4); |
| 167 | tun_nlattr(&req.n, sizeof(req), RTA_GATEWAY, gateway, 4); |
| 168 | |
| 169 | if ((fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) < 0) { |
| 170 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 171 | "socket() failed"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 172 | return -1; |
| 173 | } |
| 174 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 175 | memset(&local, 0, sizeof(local)); |
| 176 | local.nl_family = AF_NETLINK; |
| 177 | local.nl_groups = 0; |
| 178 | |
| 179 | if (bind(fd, (struct sockaddr*)&local, sizeof(local)) < 0) { |
| 180 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 181 | "bind() failed"); |
| 182 | close(fd); |
| 183 | return -1; |
| 184 | } |
| 185 | |
| 186 | addr_len = sizeof(local); |
| 187 | if (getsockname(fd, (struct sockaddr*)&local, &addr_len) < 0) { |
| 188 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 189 | "getsockname() failed"); |
| 190 | close(fd); |
| 191 | return -1; |
| 192 | } |
| 193 | |
| 194 | if (addr_len != sizeof(local)) { |
| 195 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 196 | "Wrong address length %d", addr_len); |
| 197 | close(fd); |
| 198 | return -1; |
| 199 | } |
| 200 | |
| 201 | if (local.nl_family != AF_NETLINK) { |
| 202 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 203 | "Wrong address family %d", local.nl_family); |
| 204 | close(fd); |
| 205 | return -1; |
| 206 | } |
| 207 | |
| 208 | iov.iov_base = (void*)&req.n; |
| 209 | iov.iov_len = req.n.nlmsg_len; |
| 210 | |
| 211 | msg.msg_name = (void*)&nladdr; |
| 212 | msg.msg_namelen = sizeof(nladdr), |
| 213 | msg.msg_iov = &iov; |
| 214 | msg.msg_iovlen = 1; |
| 215 | msg.msg_control = NULL; |
| 216 | msg.msg_controllen = 0; |
| 217 | msg.msg_flags = 0; |
| 218 | |
| 219 | memset(&nladdr, 0, sizeof(nladdr)); |
| 220 | nladdr.nl_family = AF_NETLINK; |
| 221 | nladdr.nl_pid = 0; |
| 222 | nladdr.nl_groups = 0; |
| 223 | |
| 224 | req.n.nlmsg_seq = 0; |
| 225 | req.n.nlmsg_flags |= NLM_F_ACK; |
| 226 | |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 227 | status = sendmsg(fd, &msg, 0); * TODO: Error check * |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 228 | close(fd); |
| 229 | return 0; |
| 230 | } |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 231 | */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 232 | |
| 233 | int tun_addaddr(struct tun_t *this, |
| 234 | struct in_addr *addr, |
| 235 | struct in_addr *dstaddr, |
| 236 | struct in_addr *netmask) { |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 237 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 238 | #if defined(__linux__) |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 239 | struct { |
| 240 | struct nlmsghdr n; |
| 241 | struct ifaddrmsg i; |
| 242 | char buf[TUN_NLBUFSIZE]; |
| 243 | } req; |
| 244 | |
| 245 | struct sockaddr_nl local; |
Harald Welte | f54a1f4 | 2010-05-04 11:08:38 +0200 | [diff] [blame] | 246 | socklen_t addr_len; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 247 | int fd; |
| 248 | int status; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 249 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 250 | struct sockaddr_nl nladdr; |
| 251 | struct iovec iov; |
| 252 | struct msghdr msg; |
| 253 | |
| 254 | if (!this->addrs) /* Use ioctl for first addr to make ping work */ |
| 255 | return tun_setaddr(this, addr, dstaddr, netmask); |
| 256 | |
| 257 | memset(&req, 0, sizeof(req)); |
| 258 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)); |
| 259 | req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE; |
| 260 | req.n.nlmsg_type = RTM_NEWADDR; |
| 261 | req.i.ifa_family = AF_INET; |
| 262 | req.i.ifa_prefixlen = 32; /* 32 FOR IPv4 */ |
| 263 | req.i.ifa_flags = 0; |
| 264 | req.i.ifa_scope = RT_SCOPE_HOST; /* TODO or 0 */ |
| 265 | if (tun_gifindex(this, &req.i.ifa_index)) { |
| 266 | return -1; |
| 267 | } |
| 268 | |
| 269 | tun_nlattr(&req.n, sizeof(req), IFA_ADDRESS, addr, sizeof(addr)); |
| 270 | tun_nlattr(&req.n, sizeof(req), IFA_LOCAL, dstaddr, sizeof(dstaddr)); |
| 271 | |
| 272 | if ((fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) < 0) { |
| 273 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 274 | "socket() failed"); |
| 275 | return -1; |
| 276 | } |
| 277 | |
| 278 | memset(&local, 0, sizeof(local)); |
| 279 | local.nl_family = AF_NETLINK; |
| 280 | local.nl_groups = 0; |
| 281 | |
| 282 | if (bind(fd, (struct sockaddr*)&local, sizeof(local)) < 0) { |
| 283 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 284 | "bind() failed"); |
| 285 | close(fd); |
| 286 | return -1; |
| 287 | } |
| 288 | |
| 289 | addr_len = sizeof(local); |
| 290 | if (getsockname(fd, (struct sockaddr*)&local, &addr_len) < 0) { |
| 291 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 292 | "getsockname() failed"); |
| 293 | close(fd); |
| 294 | return -1; |
| 295 | } |
| 296 | |
| 297 | if (addr_len != sizeof(local)) { |
| 298 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 299 | "Wrong address length %d", addr_len); |
| 300 | close(fd); |
| 301 | return -1; |
| 302 | } |
| 303 | |
| 304 | if (local.nl_family != AF_NETLINK) { |
| 305 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 306 | "Wrong address family %d", local.nl_family); |
| 307 | close(fd); |
| 308 | return -1; |
| 309 | } |
| 310 | |
| 311 | iov.iov_base = (void*)&req.n; |
| 312 | iov.iov_len = req.n.nlmsg_len; |
| 313 | |
| 314 | msg.msg_name = (void*)&nladdr; |
| 315 | msg.msg_namelen = sizeof(nladdr), |
| 316 | msg.msg_iov = &iov; |
| 317 | msg.msg_iovlen = 1; |
| 318 | msg.msg_control = NULL; |
| 319 | msg.msg_controllen = 0; |
| 320 | msg.msg_flags = 0; |
| 321 | |
| 322 | memset(&nladdr, 0, sizeof(nladdr)); |
| 323 | nladdr.nl_family = AF_NETLINK; |
| 324 | nladdr.nl_pid = 0; |
| 325 | nladdr.nl_groups = 0; |
| 326 | |
| 327 | req.n.nlmsg_seq = 0; |
| 328 | req.n.nlmsg_flags |= NLM_F_ACK; |
| 329 | |
| 330 | status = sendmsg(fd, &msg, 0); /* TODO Error check */ |
| 331 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 332 | tun_sifflags(this, IFF_UP | IFF_RUNNING); /* TODO */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 333 | close(fd); |
| 334 | this->addrs++; |
| 335 | return 0; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 336 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 337 | #elif defined (__FreeBSD__) || defined (__APPLE__) |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 338 | |
| 339 | int fd; |
| 340 | struct ifaliasreq areq; |
| 341 | |
| 342 | /* TODO: Is this needed on FreeBSD? */ |
| 343 | if (!this->addrs) /* Use ioctl for first addr to make ping work */ |
jjako | 1f15864 | 2004-02-05 20:39:57 +0000 | [diff] [blame] | 344 | return tun_setaddr(this, addr, dstaddr, netmask); /* TODO dstaddr */ |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 345 | |
| 346 | memset(&areq, 0, sizeof(areq)); |
| 347 | |
| 348 | /* Set up interface name */ |
| 349 | strncpy(areq.ifra_name, this->devname, IFNAMSIZ); |
jjako | 1f15864 | 2004-02-05 20:39:57 +0000 | [diff] [blame] | 350 | areq.ifra_name[IFNAMSIZ-1] = 0; /* Make sure to terminate */ |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 351 | |
jjako | 1f15864 | 2004-02-05 20:39:57 +0000 | [diff] [blame] | 352 | ((struct sockaddr_in*) &areq.ifra_addr)->sin_family = AF_INET; |
| 353 | ((struct sockaddr_in*) &areq.ifra_addr)->sin_len = sizeof(areq.ifra_addr); |
| 354 | ((struct sockaddr_in*) &areq.ifra_addr)->sin_addr.s_addr = addr->s_addr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 355 | |
jjako | 1f15864 | 2004-02-05 20:39:57 +0000 | [diff] [blame] | 356 | ((struct sockaddr_in*) &areq.ifra_mask)->sin_family = AF_INET; |
| 357 | ((struct sockaddr_in*) &areq.ifra_mask)->sin_len = sizeof(areq.ifra_mask); |
| 358 | ((struct sockaddr_in*) &areq.ifra_mask)->sin_addr.s_addr = netmask->s_addr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 359 | |
jjako | 1f15864 | 2004-02-05 20:39:57 +0000 | [diff] [blame] | 360 | /* For some reason FreeBSD uses ifra_broadcast for specifying dstaddr */ |
| 361 | ((struct sockaddr_in*) &areq.ifra_broadaddr)->sin_family = AF_INET; |
| 362 | ((struct sockaddr_in*) &areq.ifra_broadaddr)->sin_len = |
| 363 | sizeof(areq.ifra_broadaddr); |
| 364 | ((struct sockaddr_in*) &areq.ifra_broadaddr)->sin_addr.s_addr = |
| 365 | dstaddr->s_addr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 366 | |
| 367 | /* Create a channel to the NET kernel. */ |
| 368 | if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| 369 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 370 | "socket() failed"); |
| 371 | return -1; |
| 372 | } |
| 373 | |
| 374 | if (ioctl(fd, SIOCAIFADDR, (void *) &areq) < 0) { |
| 375 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 376 | "ioctl(SIOCAIFADDR) failed"); |
| 377 | close(fd); |
| 378 | return -1; |
| 379 | } |
| 380 | |
| 381 | close(fd); |
| 382 | this->addrs++; |
| 383 | return 0; |
| 384 | |
| 385 | #elif defined (__sun__) |
| 386 | |
| 387 | if (!this->addrs) /* Use ioctl for first addr to make ping work */ |
| 388 | return tun_setaddr(this, addr, dstaddr, netmask); |
| 389 | |
| 390 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 391 | "Setting multiple addresses not possible on Solaris"); |
| 392 | return -1; |
| 393 | |
| 394 | #else |
| 395 | #error "Unknown platform!" |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 396 | #endif |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 397 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 398 | } |
| 399 | |
| 400 | |
| 401 | int tun_setaddr(struct tun_t *this, |
| 402 | struct in_addr *addr, |
| 403 | struct in_addr *dstaddr, |
| 404 | struct in_addr *netmask) |
| 405 | { |
| 406 | struct ifreq ifr; |
| 407 | int fd; |
| 408 | |
| 409 | memset (&ifr, '\0', sizeof (ifr)); |
| 410 | ifr.ifr_addr.sa_family = AF_INET; |
| 411 | ifr.ifr_dstaddr.sa_family = AF_INET; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 412 | |
| 413 | #if defined(__linux__) |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 414 | ifr.ifr_netmask.sa_family = AF_INET; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 415 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 416 | #elif defined(__FreeBSD__) || defined (__APPLE__) |
jjako | 243bfe6 | 2004-01-26 23:06:05 +0000 | [diff] [blame] | 417 | ((struct sockaddr_in *) &ifr.ifr_addr)->sin_len = |
| 418 | sizeof (struct sockaddr_in); |
| 419 | ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_len = |
| 420 | sizeof (struct sockaddr_in); |
| 421 | #endif |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 422 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 423 | strncpy(ifr.ifr_name, this->devname, IFNAMSIZ); |
| 424 | ifr.ifr_name[IFNAMSIZ-1] = 0; /* Make sure to terminate */ |
| 425 | |
| 426 | /* Create a channel to the NET kernel. */ |
| 427 | if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| 428 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 429 | "socket() failed"); |
| 430 | return -1; |
| 431 | } |
| 432 | |
| 433 | if (addr) { /* Set the interface address */ |
| 434 | this->addr.s_addr = addr->s_addr; |
Emmanuel Bretelle | 4e56c83 | 2010-09-07 20:06:12 +0200 | [diff] [blame] | 435 | memcpy(&((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr, addr, |
| 436 | sizeof(*addr)); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 437 | if (ioctl(fd, SIOCSIFADDR, (void *) &ifr) < 0) { |
| 438 | if (errno != EEXIST) { |
| 439 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 440 | "ioctl(SIOCSIFADDR) failed"); |
| 441 | } |
| 442 | else { |
| 443 | sys_err(LOG_WARNING, __FILE__, __LINE__, errno, |
| 444 | "ioctl(SIOCSIFADDR): Address already exists"); |
| 445 | } |
| 446 | close(fd); |
| 447 | return -1; |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | if (dstaddr) { /* Set the destination address */ |
| 452 | this->dstaddr.s_addr = dstaddr->s_addr; |
Emmanuel Bretelle | 4e56c83 | 2010-09-07 20:06:12 +0200 | [diff] [blame] | 453 | memcpy(&((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr, |
| 454 | dstaddr, sizeof(*dstaddr)); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 455 | if (ioctl(fd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) { |
| 456 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 457 | "ioctl(SIOCSIFDSTADDR) failed"); |
| 458 | close(fd); |
| 459 | return -1; |
| 460 | } |
| 461 | } |
| 462 | |
| 463 | if (netmask) { /* Set the netmask */ |
| 464 | this->netmask.s_addr = netmask->s_addr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 465 | #if defined(__linux__) |
Emmanuel Bretelle | 4e56c83 | 2010-09-07 20:06:12 +0200 | [diff] [blame] | 466 | memcpy(&((struct sockaddr_in *) &ifr.ifr_netmask)->sin_addr, |
| 467 | netmask, sizeof(*netmask)); |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 468 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 469 | #elif defined(__FreeBSD__) || defined (__APPLE__) |
jjako | 243bfe6 | 2004-01-26 23:06:05 +0000 | [diff] [blame] | 470 | ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = |
| 471 | netmask->s_addr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 472 | |
| 473 | #elif defined(__sun__) |
| 474 | ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 475 | netmask->s_addr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 476 | #else |
| 477 | #error "Unknown platform!" |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 478 | #endif |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 479 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 480 | if (ioctl(fd, SIOCSIFNETMASK, (void *) &ifr) < 0) { |
| 481 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 482 | "ioctl(SIOCSIFNETMASK) failed"); |
| 483 | close(fd); |
| 484 | return -1; |
| 485 | } |
| 486 | } |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 487 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 488 | close(fd); |
| 489 | this->addrs++; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 490 | |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 491 | /* On linux the route to the interface is set automatically |
| 492 | on FreeBSD we have to do this manually */ |
| 493 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 494 | /* TODO: How does it work on Solaris? */ |
| 495 | |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 496 | tun_sifflags(this, IFF_UP | IFF_RUNNING); |
| 497 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 498 | #if defined(__FreeBSD__) || defined (__APPLE__) |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 499 | tun_addroute(this, dstaddr, addr, netmask); |
| 500 | this->routes = 1; |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 501 | #endif |
| 502 | |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 503 | return 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 504 | } |
| 505 | |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 506 | int tun_route(struct tun_t *this, |
| 507 | struct in_addr *dst, |
| 508 | struct in_addr *gateway, |
| 509 | struct in_addr *mask, |
| 510 | int delete) |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 511 | { |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 512 | |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 513 | |
| 514 | /* TODO: Learn how to set routing table on sun */ |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 515 | |
| 516 | #if defined(__linux__) |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 517 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 518 | struct rtentry r; |
| 519 | int fd; |
| 520 | |
| 521 | memset (&r, '\0', sizeof (r)); |
| 522 | r.rt_flags = RTF_UP | RTF_GATEWAY; /* RTF_HOST not set */ |
| 523 | |
| 524 | /* Create a channel to the NET kernel. */ |
| 525 | if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| 526 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 527 | "socket() failed"); |
| 528 | return -1; |
| 529 | } |
| 530 | |
| 531 | r.rt_dst.sa_family = AF_INET; |
| 532 | r.rt_gateway.sa_family = AF_INET; |
| 533 | r.rt_genmask.sa_family = AF_INET; |
Emmanuel Bretelle | 4e56c83 | 2010-09-07 20:06:12 +0200 | [diff] [blame] | 534 | memcpy(&((struct sockaddr_in *) &r.rt_dst)->sin_addr, dst, sizeof(*dst)); |
| 535 | memcpy(&((struct sockaddr_in *) &r.rt_gateway)->sin_addr, gateway, |
| 536 | sizeof(*gateway)); |
| 537 | memcpy(&((struct sockaddr_in *) &r.rt_genmask)->sin_addr, mask, |
| 538 | sizeof(*mask)); |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 539 | |
| 540 | if (delete) { |
| 541 | if (ioctl(fd, SIOCDELRT, (void *) &r) < 0) { |
| 542 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 543 | "ioctl(SIOCDELRT) failed"); |
| 544 | close(fd); |
| 545 | return -1; |
| 546 | } |
| 547 | } |
| 548 | else { |
| 549 | if (ioctl(fd, SIOCADDRT, (void *) &r) < 0) { |
| 550 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 551 | "ioctl(SIOCADDRT) failed"); |
| 552 | close(fd); |
| 553 | return -1; |
| 554 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 555 | } |
| 556 | close(fd); |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 557 | return 0; |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 558 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 559 | #elif defined(__FreeBSD__) || defined (__APPLE__) |
jjako | 3eaf453 | 2004-01-27 19:47:49 +0000 | [diff] [blame] | 560 | |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 561 | struct { |
| 562 | struct rt_msghdr rt; |
| 563 | struct sockaddr_in dst; |
| 564 | struct sockaddr_in gate; |
| 565 | struct sockaddr_in mask; |
| 566 | } req; |
jjako | 3eaf453 | 2004-01-27 19:47:49 +0000 | [diff] [blame] | 567 | |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 568 | int fd; |
jjako | 3eaf453 | 2004-01-27 19:47:49 +0000 | [diff] [blame] | 569 | struct rt_msghdr *rtm; |
jjako | 3eaf453 | 2004-01-27 19:47:49 +0000 | [diff] [blame] | 570 | |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 571 | if((fd = socket(AF_ROUTE, SOCK_RAW, 0)) == -1) { |
| 572 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 573 | "socket() failed"); |
| 574 | return -1; |
| 575 | } |
jjako | 3eaf453 | 2004-01-27 19:47:49 +0000 | [diff] [blame] | 576 | |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 577 | memset(&req, 0x00, sizeof(req)); |
jjako | 3eaf453 | 2004-01-27 19:47:49 +0000 | [diff] [blame] | 578 | |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 579 | rtm = &req.rt; |
jjako | 3eaf453 | 2004-01-27 19:47:49 +0000 | [diff] [blame] | 580 | |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 581 | rtm->rtm_msglen = sizeof(req); |
| 582 | rtm->rtm_version = RTM_VERSION; |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 583 | if (delete) { |
| 584 | rtm->rtm_type = RTM_DELETE; |
| 585 | } |
| 586 | else { |
| 587 | rtm->rtm_type = RTM_ADD; |
| 588 | } |
jjako | 3eaf453 | 2004-01-27 19:47:49 +0000 | [diff] [blame] | 589 | rtm->rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC; /* TODO */ |
jjako | 3eaf453 | 2004-01-27 19:47:49 +0000 | [diff] [blame] | 590 | rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; |
| 591 | rtm->rtm_pid = getpid(); |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 592 | rtm->rtm_seq = 0044; /* TODO */ |
jjako | 3eaf453 | 2004-01-27 19:47:49 +0000 | [diff] [blame] | 593 | |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 594 | req.dst.sin_family = AF_INET; |
| 595 | req.dst.sin_len = sizeof(req.dst); |
| 596 | req.mask.sin_family = AF_INET; |
| 597 | req.mask.sin_len = sizeof(req.mask); |
| 598 | req.gate.sin_family = AF_INET; |
| 599 | req.gate.sin_len = sizeof(req.gate); |
| 600 | |
| 601 | req.dst.sin_addr.s_addr = dst->s_addr; |
| 602 | req.mask.sin_addr.s_addr = mask->s_addr; |
| 603 | req.gate.sin_addr.s_addr = gateway->s_addr; |
jjako | 3eaf453 | 2004-01-27 19:47:49 +0000 | [diff] [blame] | 604 | |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 605 | if(write(fd, rtm, rtm->rtm_msglen) < 0) { |
| 606 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 607 | "write() failed"); |
| 608 | close(fd); |
| 609 | return -1; |
| 610 | } |
| 611 | close(fd); |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 612 | return 0; |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 613 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 614 | #elif defined(__sun__) |
| 615 | sys_err(LOG_WARNING, __FILE__, __LINE__, errno, |
| 616 | "Could not set up routing on Solaris. Please add route manually."); |
| 617 | return 0; |
| 618 | |
| 619 | #else |
| 620 | #error "Unknown platform!" |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 621 | #endif |
| 622 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 623 | } |
| 624 | |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 625 | int tun_addroute(struct tun_t *this, |
| 626 | struct in_addr *dst, |
| 627 | struct in_addr *gateway, |
| 628 | struct in_addr *mask) |
| 629 | { |
| 630 | return tun_route(this, dst, gateway, mask, 0); |
| 631 | } |
| 632 | |
| 633 | int tun_delroute(struct tun_t *this, |
| 634 | struct in_addr *dst, |
| 635 | struct in_addr *gateway, |
| 636 | struct in_addr *mask) |
| 637 | { |
| 638 | return tun_route(this, dst, gateway, mask, 1); |
| 639 | } |
| 640 | |
| 641 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 642 | int tun_new(struct tun_t **tun) |
| 643 | { |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 644 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 645 | #if defined(__linux__) |
| 646 | struct ifreq ifr; |
| 647 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 648 | #elif defined(__FreeBSD__) || defined (__APPLE__) |
jjako | 243bfe6 | 2004-01-26 23:06:05 +0000 | [diff] [blame] | 649 | char devname[IFNAMSIZ+5]; /* "/dev/" + ifname */ |
| 650 | int devnum; |
jjako | 1f15864 | 2004-02-05 20:39:57 +0000 | [diff] [blame] | 651 | struct ifaliasreq areq; |
| 652 | int fd; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 653 | |
| 654 | #elif defined(__sun__) |
| 655 | int if_fd, ppa = -1; |
| 656 | static int ip_fd = 0; |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 657 | int muxid; |
| 658 | struct ifreq ifr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 659 | |
jjako | 06e9f12 | 2004-01-19 18:37:58 +0000 | [diff] [blame] | 660 | #else |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 661 | #error "Unknown platform!" |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 662 | #endif |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 663 | |
| 664 | if (!(*tun = calloc(1, sizeof(struct tun_t)))) { |
| 665 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "calloc() failed"); |
| 666 | return EOF; |
| 667 | } |
| 668 | |
| 669 | (*tun)->cb_ind = NULL; |
| 670 | (*tun)->addrs = 0; |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 671 | (*tun)->routes = 0; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 672 | |
| 673 | #if defined(__linux__) |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 674 | /* Open the actual tun device */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 675 | if (((*tun)->fd = open("/dev/net/tun", O_RDWR)) < 0) { |
| 676 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "open() failed"); |
| 677 | return -1; |
| 678 | } |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 679 | |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 680 | /* Set device flags. For some weird reason this is also the method |
| 681 | used to obtain the network interface name */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 682 | memset(&ifr, 0, sizeof(ifr)); |
| 683 | ifr.ifr_flags = IFF_TUN | IFF_NO_PI; /* Tun device, no packet info */ |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 684 | if (ioctl((*tun)->fd, TUNSETIFF, (void *) &ifr) < 0) { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 685 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "ioctl() failed"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 686 | close((*tun)->fd); |
| 687 | return -1; |
| 688 | } |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 689 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 690 | strncpy((*tun)->devname, ifr.ifr_name, IFNAMSIZ); |
Emmanuel Bretelle | 87490d7 | 2010-09-07 20:22:36 +0200 | [diff] [blame^] | 691 | (*tun)->devname[IFNAMSIZ-1] = 0; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 692 | |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 693 | ioctl((*tun)->fd, TUNSETNOCSUM, 1); /* Disable checksums */ |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 694 | return 0; |
| 695 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 696 | #elif defined(__FreeBSD__) || defined (__APPLE__) |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 697 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 698 | /* Find suitable device */ |
| 699 | for (devnum = 0; devnum < 255; devnum++) { /* TODO 255 */ |
| 700 | snprintf(devname, sizeof(devname), "/dev/tun%d", devnum); |
| 701 | devname[sizeof(devname)] = 0; |
| 702 | if (((*tun)->fd = open(devname, O_RDWR)) >= 0) break; |
| 703 | if (errno != EBUSY) break; |
| 704 | } |
| 705 | if ((*tun)->fd < 0) { |
| 706 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "Can't find tunnel device"); |
| 707 | return -1; |
| 708 | } |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 709 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 710 | snprintf((*tun)->devname, sizeof((*tun)->devname), "tun%d", devnum); |
| 711 | (*tun)->devname[sizeof((*tun)->devname)] = 0; |
jjako | 1f15864 | 2004-02-05 20:39:57 +0000 | [diff] [blame] | 712 | |
| 713 | /* The tun device we found might have "old" IP addresses allocated */ |
| 714 | /* We need to delete those. This problem is not present on Linux */ |
| 715 | |
| 716 | memset(&areq, 0, sizeof(areq)); |
| 717 | |
| 718 | /* Set up interface name */ |
| 719 | strncpy(areq.ifra_name, (*tun)->devname, IFNAMSIZ); |
| 720 | areq.ifra_name[IFNAMSIZ-1] = 0; /* Make sure to terminate */ |
| 721 | |
| 722 | /* Create a channel to the NET kernel. */ |
| 723 | if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| 724 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 725 | "socket() failed"); |
| 726 | return -1; |
| 727 | } |
| 728 | |
| 729 | /* Delete any IP addresses until SIOCDIFADDR fails */ |
| 730 | while (ioctl(fd, SIOCDIFADDR, (void *) &areq) != -1); |
| 731 | |
| 732 | close(fd); |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 733 | return 0; |
| 734 | |
| 735 | #elif defined(__sun__) |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 736 | |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 737 | if( (ip_fd = open("/dev/udp", O_RDWR, 0)) < 0){ |
| 738 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "Can't open /dev/udp"); |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 739 | return -1; |
| 740 | } |
| 741 | |
| 742 | if( ((*tun)->fd = open("/dev/tun", O_RDWR, 0)) < 0){ |
| 743 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "Can't open /dev/tun"); |
| 744 | return -1; |
| 745 | } |
| 746 | |
| 747 | /* Assign a new PPA and get its unit number. */ |
| 748 | if( (ppa = ioctl((*tun)->fd, TUNNEWPPA, -1)) < 0){ |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 749 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "Can't assign new interface"); |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 750 | return -1; |
| 751 | } |
| 752 | |
| 753 | if( (if_fd = open("/dev/tun", O_RDWR, 0)) < 0){ |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 754 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "Can't open /dev/tun (2)"); |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 755 | return -1; |
| 756 | } |
| 757 | if(ioctl(if_fd, I_PUSH, "ip") < 0){ |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 758 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "Can't push IP module"); |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 759 | return -1; |
| 760 | } |
| 761 | |
| 762 | /* Assign ppa according to the unit number returned by tun device */ |
| 763 | if(ioctl(if_fd, IF_UNITSEL, (char *)&ppa) < 0){ |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 764 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "Can't set PPA %d", ppa); |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 765 | return -1; |
| 766 | } |
| 767 | |
| 768 | /* Link the two streams */ |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 769 | if ((muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0) { |
| 770 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "Can't link TUN device to IP"); |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 771 | return -1; |
| 772 | } |
| 773 | |
| 774 | close (if_fd); |
| 775 | |
jjako | 243bfe6 | 2004-01-26 23:06:05 +0000 | [diff] [blame] | 776 | snprintf((*tun)->devname, sizeof((*tun)->devname), "tun%d", ppa); |
| 777 | (*tun)->devname[sizeof((*tun)->devname)] = 0; |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 778 | |
| 779 | memset(&ifr, 0, sizeof(ifr)); |
| 780 | strcpy(ifr.ifr_name, (*tun)->devname); |
| 781 | ifr.ifr_ip_muxid = muxid; |
| 782 | |
| 783 | if (ioctl(ip_fd, SIOCSIFMUXID, &ifr) < 0) { |
| 784 | ioctl(ip_fd, I_PUNLINK, muxid); |
| 785 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "Can't set multiplexor id"); |
| 786 | return -1; |
| 787 | } |
| 788 | |
| 789 | /* if (fcntl (fd, F_SETFL, O_NONBLOCK) < 0) |
| 790 | msg (M_ERR, "Set file descriptor to non-blocking failed"); */ |
| 791 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 792 | return 0; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 793 | |
| 794 | #else |
| 795 | #error "Unknown platform!" |
| 796 | #endif |
| 797 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 798 | } |
| 799 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 800 | int tun_free(struct tun_t *tun) |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 801 | { |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 802 | |
| 803 | if (tun->routes) { |
| 804 | tun_delroute(tun, &tun->dstaddr, &tun->addr, &tun->netmask); |
| 805 | } |
| 806 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 807 | if (close(tun->fd)) { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 808 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "close() failed"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 809 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 810 | |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 811 | /* TODO: For solaris we need to unlink streams */ |
| 812 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 813 | free(tun); |
| 814 | return 0; |
| 815 | } |
| 816 | |
| 817 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 818 | int tun_set_cb_ind(struct tun_t *this, |
| 819 | int (*cb_ind) (struct tun_t *tun, void *pack, unsigned len)) { |
| 820 | this->cb_ind = cb_ind; |
| 821 | return 0; |
| 822 | } |
| 823 | |
| 824 | |
| 825 | int tun_decaps(struct tun_t *this) |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 826 | { |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 827 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 828 | #if defined(__linux__) || defined (__FreeBSD__) || defined (__APPLE__) |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 829 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 830 | unsigned char buffer[PACKET_MAX]; |
| 831 | int status; |
| 832 | |
| 833 | if ((status = read(this->fd, buffer, sizeof(buffer))) <= 0) { |
| 834 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "read() failed"); |
| 835 | return -1; |
| 836 | } |
| 837 | |
| 838 | if (this->cb_ind) |
| 839 | return this->cb_ind(this, buffer, status); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 840 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 841 | return 0; |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 842 | |
| 843 | #elif defined (__sun__) |
| 844 | |
| 845 | unsigned char buffer[PACKET_MAX]; |
| 846 | struct strbuf sbuf; |
| 847 | int f = 0; |
| 848 | |
| 849 | sbuf.maxlen = PACKET_MAX; |
| 850 | sbuf.buf = buffer; |
| 851 | if (getmsg(this->fd, NULL, &sbuf, &f) < 0) { |
| 852 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "getmsg() failed"); |
| 853 | return -1; |
| 854 | } |
| 855 | |
| 856 | if (this->cb_ind) |
| 857 | return this->cb_ind(this, buffer, sbuf.len); |
| 858 | |
| 859 | return 0; |
| 860 | |
| 861 | #endif |
| 862 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 863 | } |
| 864 | |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 865 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 866 | int tun_encaps(struct tun_t *tun, void *pack, unsigned len) |
| 867 | { |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 868 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 869 | #if defined(__linux__) || defined (__FreeBSD__) || defined (__APPLE__) |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 870 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 871 | return write(tun->fd, pack, len); |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 872 | |
| 873 | #elif defined (__sun__) |
| 874 | |
| 875 | struct strbuf sbuf; |
| 876 | sbuf.len = len; |
| 877 | sbuf.buf = pack; |
| 878 | return putmsg(tun->fd, NULL, &sbuf, 0); |
| 879 | |
| 880 | #endif |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 881 | } |
| 882 | |
| 883 | int tun_runscript(struct tun_t *tun, char* script) { |
| 884 | |
| 885 | char buf[TUN_SCRIPTSIZE]; |
| 886 | char snet[TUN_ADDRSIZE]; |
| 887 | char smask[TUN_ADDRSIZE]; |
Emmanuel Bretelle | 4e56c83 | 2010-09-07 20:06:12 +0200 | [diff] [blame] | 888 | int rc; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 889 | |
| 890 | strncpy(snet, inet_ntoa(tun->addr), sizeof(snet)); |
| 891 | snet[sizeof(snet)-1] = 0; |
| 892 | strncpy(smask, inet_ntoa(tun->netmask), sizeof(smask)); |
| 893 | smask[sizeof(smask)-1] = 0; |
| 894 | |
| 895 | /* system("ipup /dev/tun0 192.168.0.10 255.255.255.0"); */ |
| 896 | snprintf(buf, sizeof(buf), "%s %s %s %s", |
| 897 | script, tun->devname, snet, smask); |
| 898 | buf[sizeof(buf)-1] = 0; |
Emmanuel Bretelle | 4e56c83 | 2010-09-07 20:06:12 +0200 | [diff] [blame] | 899 | rc = system(buf); |
| 900 | if (rc == -1) { |
| 901 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "Error executing command %s", |
| 902 | buf); |
| 903 | return -1; |
| 904 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 905 | return 0; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 906 | } |