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 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 19 | #include <syslog.h> |
| 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <sys/types.h> |
| 23 | #include <sys/socket.h> |
| 24 | #include <netinet/in.h> |
| 25 | #include <arpa/inet.h> |
| 26 | #include <sys/stat.h> |
| 27 | #include <sys/time.h> |
| 28 | #include <unistd.h> |
| 29 | #include <string.h> |
| 30 | #include <errno.h> |
| 31 | #include <fcntl.h> |
| 32 | |
| 33 | #include <stdio.h> |
| 34 | #include <fcntl.h> |
| 35 | #include <unistd.h> |
| 36 | #include <sys/time.h> |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 37 | #include <sys/ioctl.h> |
| 38 | #include <sys/socket.h> |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 39 | #include <errno.h> |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 40 | #include <net/route.h> |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 41 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 42 | #if defined(__linux__) |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 43 | #include <linux/if.h> |
| 44 | #include <linux/if_tun.h> |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 45 | #include <linux/netlink.h> |
| 46 | #include <linux/rtnetlink.h> |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 47 | |
| 48 | #elif defined (__FreeBSD__) |
| 49 | #include <net/if.h> |
| 50 | #include <net/if_tun.h> |
| 51 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 52 | #elif defined (__APPLE__) |
| 53 | #include <net/if.h> |
| 54 | |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 55 | #elif defined (__sun__) |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 56 | #include <stropts.h> |
| 57 | #include <sys/sockio.h> |
| 58 | #include <net/if.h> |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 59 | #include <net/if_tun.h> |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 60 | /*#include "sun_if_tun.h"*/ |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 61 | |
| 62 | #else |
| 63 | #error "Unknown platform!" |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 64 | #endif |
| 65 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 66 | #include "tun.h" |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 67 | #include "syserr.h" |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 68 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 69 | #if defined(__linux__) |
| 70 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 71 | 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] | 72 | { |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 73 | int len = RTA_LENGTH(dlen); |
| 74 | int alen = NLMSG_ALIGN(n->nlmsg_len); |
| 75 | struct rtattr *rta = (struct rtattr *)(((void *)n) + alen); |
| 76 | if (alen + len > nsize) |
| 77 | return -1; |
| 78 | rta->rta_len = len; |
| 79 | rta->rta_type = type; |
| 80 | memcpy(RTA_DATA(rta), d, dlen); |
| 81 | n->nlmsg_len = alen + len; |
| 82 | return 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 83 | } |
| 84 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 85 | int tun_gifindex(struct tun_t *this, __u32 * index) |
| 86 | { |
| 87 | struct ifreq ifr; |
| 88 | int fd; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 89 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 90 | memset(&ifr, '\0', sizeof(ifr)); |
| 91 | ifr.ifr_addr.sa_family = AF_INET; |
| 92 | ifr.ifr_dstaddr.sa_family = AF_INET; |
| 93 | ifr.ifr_netmask.sa_family = AF_INET; |
| 94 | strncpy(ifr.ifr_name, this->devname, IFNAMSIZ); |
| 95 | ifr.ifr_name[IFNAMSIZ - 1] = 0; /* Make sure to terminate */ |
| 96 | if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| 97 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "socket() failed"); |
| 98 | } |
| 99 | if (ioctl(fd, SIOCGIFINDEX, &ifr)) { |
| 100 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "ioctl() failed"); |
| 101 | close(fd); |
| 102 | return -1; |
| 103 | } |
| 104 | close(fd); |
| 105 | *index = ifr.ifr_ifindex; |
| 106 | return 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 107 | } |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 108 | #endif |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 109 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 110 | int tun_sifflags(struct tun_t *this, int flags) |
| 111 | { |
| 112 | struct ifreq ifr; |
| 113 | int fd; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 114 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 115 | memset(&ifr, '\0', sizeof(ifr)); |
| 116 | ifr.ifr_flags = flags; |
| 117 | strncpy(ifr.ifr_name, this->devname, IFNAMSIZ); |
| 118 | ifr.ifr_name[IFNAMSIZ - 1] = 0; /* Make sure to terminate */ |
| 119 | if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| 120 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "socket() failed"); |
| 121 | } |
| 122 | if (ioctl(fd, SIOCSIFFLAGS, &ifr)) { |
| 123 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 124 | "ioctl(SIOCSIFFLAGS) failed"); |
| 125 | close(fd); |
| 126 | return -1; |
| 127 | } |
| 128 | close(fd); |
| 129 | return 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 130 | } |
| 131 | |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 132 | /* Currently unused |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 133 | int tun_addroute2(struct tun_t *this, |
| 134 | struct in_addr *dst, |
| 135 | struct in_addr *gateway, |
| 136 | struct in_addr *mask) { |
| 137 | |
| 138 | struct { |
| 139 | struct nlmsghdr n; |
| 140 | struct rtmsg r; |
| 141 | char buf[TUN_NLBUFSIZE]; |
| 142 | } req; |
| 143 | |
| 144 | struct sockaddr_nl local; |
| 145 | int addr_len; |
| 146 | int fd; |
| 147 | int status; |
| 148 | struct sockaddr_nl nladdr; |
| 149 | struct iovec iov; |
| 150 | struct msghdr msg; |
| 151 | |
| 152 | memset(&req, 0, sizeof(req)); |
| 153 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
| 154 | req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE; |
| 155 | req.n.nlmsg_type = RTM_NEWROUTE; |
| 156 | req.r.rtm_family = AF_INET; |
| 157 | req.r.rtm_table = RT_TABLE_MAIN; |
| 158 | req.r.rtm_protocol = RTPROT_BOOT; |
| 159 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
| 160 | req.r.rtm_type = RTN_UNICAST; |
| 161 | tun_nlattr(&req.n, sizeof(req), RTA_DST, dst, 4); |
| 162 | tun_nlattr(&req.n, sizeof(req), RTA_GATEWAY, gateway, 4); |
| 163 | |
| 164 | if ((fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) < 0) { |
| 165 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 166 | "socket() failed"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 167 | return -1; |
| 168 | } |
| 169 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 170 | memset(&local, 0, sizeof(local)); |
| 171 | local.nl_family = AF_NETLINK; |
| 172 | local.nl_groups = 0; |
| 173 | |
| 174 | if (bind(fd, (struct sockaddr*)&local, sizeof(local)) < 0) { |
| 175 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 176 | "bind() failed"); |
| 177 | close(fd); |
| 178 | return -1; |
| 179 | } |
| 180 | |
| 181 | addr_len = sizeof(local); |
| 182 | if (getsockname(fd, (struct sockaddr*)&local, &addr_len) < 0) { |
| 183 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 184 | "getsockname() failed"); |
| 185 | close(fd); |
| 186 | return -1; |
| 187 | } |
| 188 | |
| 189 | if (addr_len != sizeof(local)) { |
| 190 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 191 | "Wrong address length %d", addr_len); |
| 192 | close(fd); |
| 193 | return -1; |
| 194 | } |
| 195 | |
| 196 | if (local.nl_family != AF_NETLINK) { |
| 197 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 198 | "Wrong address family %d", local.nl_family); |
| 199 | close(fd); |
| 200 | return -1; |
| 201 | } |
| 202 | |
| 203 | iov.iov_base = (void*)&req.n; |
| 204 | iov.iov_len = req.n.nlmsg_len; |
| 205 | |
| 206 | msg.msg_name = (void*)&nladdr; |
| 207 | msg.msg_namelen = sizeof(nladdr), |
| 208 | msg.msg_iov = &iov; |
| 209 | msg.msg_iovlen = 1; |
| 210 | msg.msg_control = NULL; |
| 211 | msg.msg_controllen = 0; |
| 212 | msg.msg_flags = 0; |
| 213 | |
| 214 | memset(&nladdr, 0, sizeof(nladdr)); |
| 215 | nladdr.nl_family = AF_NETLINK; |
| 216 | nladdr.nl_pid = 0; |
| 217 | nladdr.nl_groups = 0; |
| 218 | |
| 219 | req.n.nlmsg_seq = 0; |
| 220 | req.n.nlmsg_flags |= NLM_F_ACK; |
| 221 | |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 222 | status = sendmsg(fd, &msg, 0); * TODO: Error check * |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 223 | close(fd); |
| 224 | return 0; |
| 225 | } |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 226 | */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 227 | |
| 228 | int tun_addaddr(struct tun_t *this, |
| 229 | struct in_addr *addr, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 230 | struct in_addr *dstaddr, struct in_addr *netmask) |
| 231 | { |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 232 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 233 | #if defined(__linux__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 234 | struct { |
| 235 | struct nlmsghdr n; |
| 236 | struct ifaddrmsg i; |
| 237 | char buf[TUN_NLBUFSIZE]; |
| 238 | } req; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 239 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 240 | struct sockaddr_nl local; |
| 241 | socklen_t addr_len; |
| 242 | int fd; |
| 243 | int status; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 244 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 245 | struct sockaddr_nl nladdr; |
| 246 | struct iovec iov; |
| 247 | struct msghdr msg; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 248 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 249 | if (!this->addrs) /* Use ioctl for first addr to make ping work */ |
| 250 | return tun_setaddr(this, addr, dstaddr, netmask); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 251 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 252 | memset(&req, 0, sizeof(req)); |
| 253 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)); |
| 254 | req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE; |
| 255 | req.n.nlmsg_type = RTM_NEWADDR; |
| 256 | req.i.ifa_family = AF_INET; |
| 257 | req.i.ifa_prefixlen = 32; /* 32 FOR IPv4 */ |
| 258 | req.i.ifa_flags = 0; |
| 259 | req.i.ifa_scope = RT_SCOPE_HOST; /* TODO or 0 */ |
| 260 | if (tun_gifindex(this, &req.i.ifa_index)) { |
| 261 | return -1; |
| 262 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 263 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 264 | tun_nlattr(&req.n, sizeof(req), IFA_ADDRESS, addr, sizeof(addr)); |
| 265 | tun_nlattr(&req.n, sizeof(req), IFA_LOCAL, dstaddr, sizeof(dstaddr)); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 266 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 267 | if ((fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) < 0) { |
| 268 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "socket() failed"); |
| 269 | return -1; |
| 270 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 271 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 272 | memset(&local, 0, sizeof(local)); |
| 273 | local.nl_family = AF_NETLINK; |
| 274 | local.nl_groups = 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 275 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 276 | if (bind(fd, (struct sockaddr *)&local, sizeof(local)) < 0) { |
| 277 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "bind() failed"); |
| 278 | close(fd); |
| 279 | return -1; |
| 280 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 281 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 282 | addr_len = sizeof(local); |
| 283 | if (getsockname(fd, (struct sockaddr *)&local, &addr_len) < 0) { |
| 284 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 285 | "getsockname() failed"); |
| 286 | close(fd); |
| 287 | return -1; |
| 288 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 289 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 290 | if (addr_len != sizeof(local)) { |
| 291 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 292 | "Wrong address length %d", addr_len); |
| 293 | close(fd); |
| 294 | return -1; |
| 295 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 296 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 297 | if (local.nl_family != AF_NETLINK) { |
| 298 | sys_err(LOG_ERR, __FILE__, __LINE__, 0, |
| 299 | "Wrong address family %d", local.nl_family); |
| 300 | close(fd); |
| 301 | return -1; |
| 302 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 303 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 304 | iov.iov_base = (void *)&req.n; |
| 305 | iov.iov_len = req.n.nlmsg_len; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 306 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 307 | msg.msg_name = (void *)&nladdr; |
| 308 | msg.msg_namelen = sizeof(nladdr), msg.msg_iov = &iov; |
| 309 | msg.msg_iovlen = 1; |
| 310 | msg.msg_control = NULL; |
| 311 | msg.msg_controllen = 0; |
| 312 | msg.msg_flags = 0; |
| 313 | |
| 314 | memset(&nladdr, 0, sizeof(nladdr)); |
| 315 | nladdr.nl_family = AF_NETLINK; |
| 316 | nladdr.nl_pid = 0; |
| 317 | nladdr.nl_groups = 0; |
| 318 | |
| 319 | req.n.nlmsg_seq = 0; |
| 320 | req.n.nlmsg_flags |= NLM_F_ACK; |
| 321 | |
| 322 | status = sendmsg(fd, &msg, 0); /* TODO Error check */ |
| 323 | |
| 324 | tun_sifflags(this, IFF_UP | IFF_RUNNING); /* TODO */ |
| 325 | close(fd); |
| 326 | this->addrs++; |
| 327 | return 0; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 328 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 329 | #elif defined (__FreeBSD__) || defined (__APPLE__) |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 330 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 331 | int fd; |
| 332 | struct ifaliasreq areq; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 333 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 334 | /* TODO: Is this needed on FreeBSD? */ |
| 335 | if (!this->addrs) /* Use ioctl for first addr to make ping work */ |
| 336 | return tun_setaddr(this, addr, dstaddr, netmask); /* TODO dstaddr */ |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 337 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 338 | memset(&areq, 0, sizeof(areq)); |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 339 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 340 | /* Set up interface name */ |
| 341 | strncpy(areq.ifra_name, this->devname, IFNAMSIZ); |
| 342 | areq.ifra_name[IFNAMSIZ - 1] = 0; /* Make sure to terminate */ |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 343 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 344 | ((struct sockaddr_in *)&areq.ifra_addr)->sin_family = AF_INET; |
| 345 | ((struct sockaddr_in *)&areq.ifra_addr)->sin_len = |
| 346 | sizeof(areq.ifra_addr); |
| 347 | ((struct sockaddr_in *)&areq.ifra_addr)->sin_addr.s_addr = addr->s_addr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 348 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 349 | ((struct sockaddr_in *)&areq.ifra_mask)->sin_family = AF_INET; |
| 350 | ((struct sockaddr_in *)&areq.ifra_mask)->sin_len = |
| 351 | sizeof(areq.ifra_mask); |
| 352 | ((struct sockaddr_in *)&areq.ifra_mask)->sin_addr.s_addr = |
| 353 | netmask->s_addr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 354 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 355 | /* For some reason FreeBSD uses ifra_broadcast for specifying dstaddr */ |
| 356 | ((struct sockaddr_in *)&areq.ifra_broadaddr)->sin_family = AF_INET; |
| 357 | ((struct sockaddr_in *)&areq.ifra_broadaddr)->sin_len = |
| 358 | sizeof(areq.ifra_broadaddr); |
| 359 | ((struct sockaddr_in *)&areq.ifra_broadaddr)->sin_addr.s_addr = |
| 360 | dstaddr->s_addr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 361 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 362 | /* Create a channel to the NET kernel. */ |
| 363 | if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| 364 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "socket() failed"); |
| 365 | return -1; |
| 366 | } |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 367 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 368 | if (ioctl(fd, SIOCAIFADDR, (void *)&areq) < 0) { |
| 369 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 370 | "ioctl(SIOCAIFADDR) failed"); |
| 371 | close(fd); |
| 372 | return -1; |
| 373 | } |
| 374 | |
| 375 | close(fd); |
| 376 | this->addrs++; |
| 377 | return 0; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 378 | |
| 379 | #elif defined (__sun__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 380 | |
| 381 | if (!this->addrs) /* Use ioctl for first addr to make ping work */ |
| 382 | return tun_setaddr(this, addr, dstaddr, netmask); |
| 383 | |
| 384 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 385 | "Setting multiple addresses not possible on Solaris"); |
| 386 | return -1; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 387 | |
| 388 | #else |
| 389 | #error "Unknown platform!" |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 390 | #endif |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 391 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 392 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 393 | |
| 394 | int tun_setaddr(struct tun_t *this, |
| 395 | struct in_addr *addr, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 396 | struct in_addr *dstaddr, struct in_addr *netmask) |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 397 | { |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 398 | struct ifreq ifr; |
| 399 | int fd; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 400 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 401 | memset(&ifr, '\0', sizeof(ifr)); |
| 402 | ifr.ifr_addr.sa_family = AF_INET; |
| 403 | ifr.ifr_dstaddr.sa_family = AF_INET; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 404 | |
| 405 | #if defined(__linux__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 406 | ifr.ifr_netmask.sa_family = AF_INET; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 407 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 408 | #elif defined(__FreeBSD__) || defined (__APPLE__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 409 | ((struct sockaddr_in *)&ifr.ifr_addr)->sin_len = |
| 410 | sizeof(struct sockaddr_in); |
| 411 | ((struct sockaddr_in *)&ifr.ifr_dstaddr)->sin_len = |
| 412 | sizeof(struct sockaddr_in); |
jjako | 243bfe6 | 2004-01-26 23:06:05 +0000 | [diff] [blame] | 413 | #endif |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 414 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 415 | strncpy(ifr.ifr_name, this->devname, IFNAMSIZ); |
| 416 | ifr.ifr_name[IFNAMSIZ - 1] = 0; /* Make sure to terminate */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 417 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 418 | /* Create a channel to the NET kernel. */ |
| 419 | if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| 420 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "socket() failed"); |
| 421 | return -1; |
| 422 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 423 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 424 | if (addr) { /* Set the interface address */ |
| 425 | this->addr.s_addr = addr->s_addr; |
| 426 | memcpy(&((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr, addr, |
| 427 | sizeof(*addr)); |
| 428 | if (ioctl(fd, SIOCSIFADDR, (void *)&ifr) < 0) { |
| 429 | if (errno != EEXIST) { |
| 430 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 431 | "ioctl(SIOCSIFADDR) failed"); |
| 432 | } else { |
| 433 | sys_err(LOG_WARNING, __FILE__, __LINE__, errno, |
| 434 | "ioctl(SIOCSIFADDR): Address already exists"); |
| 435 | } |
| 436 | close(fd); |
| 437 | return -1; |
| 438 | } |
| 439 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 440 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 441 | if (dstaddr) { /* Set the destination address */ |
| 442 | this->dstaddr.s_addr = dstaddr->s_addr; |
| 443 | memcpy(&((struct sockaddr_in *)&ifr.ifr_dstaddr)->sin_addr, |
| 444 | dstaddr, sizeof(*dstaddr)); |
| 445 | if (ioctl(fd, SIOCSIFDSTADDR, (caddr_t) & ifr) < 0) { |
| 446 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 447 | "ioctl(SIOCSIFDSTADDR) failed"); |
| 448 | close(fd); |
| 449 | return -1; |
| 450 | } |
| 451 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 452 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 453 | if (netmask) { /* Set the netmask */ |
| 454 | this->netmask.s_addr = netmask->s_addr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 455 | #if defined(__linux__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 456 | memcpy(&((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr, |
| 457 | netmask, sizeof(*netmask)); |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 458 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 459 | #elif defined(__FreeBSD__) || defined (__APPLE__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 460 | ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr = |
| 461 | netmask->s_addr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 462 | |
| 463 | #elif defined(__sun__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 464 | ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr = |
| 465 | netmask->s_addr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 466 | #else |
| 467 | #error "Unknown platform!" |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 468 | #endif |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 469 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 470 | if (ioctl(fd, SIOCSIFNETMASK, (void *)&ifr) < 0) { |
| 471 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 472 | "ioctl(SIOCSIFNETMASK) failed"); |
| 473 | close(fd); |
| 474 | return -1; |
| 475 | } |
| 476 | } |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 477 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 478 | close(fd); |
| 479 | this->addrs++; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 480 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 481 | /* On linux the route to the interface is set automatically |
| 482 | on FreeBSD we have to do this manually */ |
| 483 | |
| 484 | /* TODO: How does it work on Solaris? */ |
| 485 | |
| 486 | tun_sifflags(this, IFF_UP | IFF_RUNNING); |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 487 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 488 | #if defined(__FreeBSD__) || defined (__APPLE__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 489 | tun_addroute(this, dstaddr, addr, netmask); |
| 490 | this->routes = 1; |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 491 | #endif |
| 492 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 493 | return 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 494 | } |
| 495 | |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 496 | int tun_route(struct tun_t *this, |
| 497 | struct in_addr *dst, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 498 | struct in_addr *gateway, struct in_addr *mask, int delete) |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 499 | { |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 500 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 501 | /* TODO: Learn how to set routing table on sun */ |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 502 | |
| 503 | #if defined(__linux__) |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 504 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 505 | struct rtentry r; |
| 506 | int fd; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 507 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 508 | memset(&r, '\0', sizeof(r)); |
| 509 | r.rt_flags = RTF_UP | RTF_GATEWAY; /* RTF_HOST not set */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 510 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 511 | /* Create a channel to the NET kernel. */ |
| 512 | if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| 513 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "socket() failed"); |
| 514 | return -1; |
| 515 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 516 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 517 | r.rt_dst.sa_family = AF_INET; |
| 518 | r.rt_gateway.sa_family = AF_INET; |
| 519 | r.rt_genmask.sa_family = AF_INET; |
| 520 | memcpy(&((struct sockaddr_in *)&r.rt_dst)->sin_addr, dst, sizeof(*dst)); |
| 521 | memcpy(&((struct sockaddr_in *)&r.rt_gateway)->sin_addr, gateway, |
| 522 | sizeof(*gateway)); |
| 523 | memcpy(&((struct sockaddr_in *)&r.rt_genmask)->sin_addr, mask, |
| 524 | sizeof(*mask)); |
| 525 | |
| 526 | if (delete) { |
| 527 | if (ioctl(fd, SIOCDELRT, (void *)&r) < 0) { |
| 528 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 529 | "ioctl(SIOCDELRT) failed"); |
| 530 | close(fd); |
| 531 | return -1; |
| 532 | } |
| 533 | } else { |
| 534 | if (ioctl(fd, SIOCADDRT, (void *)&r) < 0) { |
| 535 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 536 | "ioctl(SIOCADDRT) failed"); |
| 537 | close(fd); |
| 538 | return -1; |
| 539 | } |
| 540 | } |
| 541 | close(fd); |
| 542 | return 0; |
| 543 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 544 | #elif defined(__FreeBSD__) || defined (__APPLE__) |
jjako | 3eaf453 | 2004-01-27 19:47:49 +0000 | [diff] [blame] | 545 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 546 | struct { |
| 547 | struct rt_msghdr rt; |
| 548 | struct sockaddr_in dst; |
| 549 | struct sockaddr_in gate; |
| 550 | struct sockaddr_in mask; |
| 551 | } req; |
jjako | 3eaf453 | 2004-01-27 19:47:49 +0000 | [diff] [blame] | 552 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 553 | int fd; |
| 554 | struct rt_msghdr *rtm; |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 555 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 556 | if ((fd = socket(AF_ROUTE, SOCK_RAW, 0)) == -1) { |
| 557 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "socket() failed"); |
| 558 | return -1; |
| 559 | } |
| 560 | |
| 561 | memset(&req, 0x00, sizeof(req)); |
| 562 | |
| 563 | rtm = &req.rt; |
| 564 | |
| 565 | rtm->rtm_msglen = sizeof(req); |
| 566 | rtm->rtm_version = RTM_VERSION; |
| 567 | if (delete) { |
| 568 | rtm->rtm_type = RTM_DELETE; |
| 569 | } else { |
| 570 | rtm->rtm_type = RTM_ADD; |
| 571 | } |
| 572 | rtm->rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC; /* TODO */ |
| 573 | rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; |
| 574 | rtm->rtm_pid = getpid(); |
| 575 | rtm->rtm_seq = 0044; /* TODO */ |
| 576 | |
| 577 | req.dst.sin_family = AF_INET; |
| 578 | req.dst.sin_len = sizeof(req.dst); |
| 579 | req.mask.sin_family = AF_INET; |
| 580 | req.mask.sin_len = sizeof(req.mask); |
| 581 | req.gate.sin_family = AF_INET; |
| 582 | req.gate.sin_len = sizeof(req.gate); |
| 583 | |
| 584 | req.dst.sin_addr.s_addr = dst->s_addr; |
| 585 | req.mask.sin_addr.s_addr = mask->s_addr; |
| 586 | req.gate.sin_addr.s_addr = gateway->s_addr; |
| 587 | |
| 588 | if (write(fd, rtm, rtm->rtm_msglen) < 0) { |
| 589 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "write() failed"); |
| 590 | close(fd); |
| 591 | return -1; |
| 592 | } |
| 593 | close(fd); |
| 594 | return 0; |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 595 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 596 | #elif defined(__sun__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 597 | sys_err(LOG_WARNING, __FILE__, __LINE__, errno, |
| 598 | "Could not set up routing on Solaris. Please add route manually."); |
| 599 | return 0; |
| 600 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 601 | #else |
| 602 | #error "Unknown platform!" |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 603 | #endif |
| 604 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 605 | } |
| 606 | |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 607 | int tun_addroute(struct tun_t *this, |
| 608 | struct in_addr *dst, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 609 | struct in_addr *gateway, struct in_addr *mask) |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 610 | { |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 611 | return tun_route(this, dst, gateway, mask, 0); |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 612 | } |
| 613 | |
| 614 | int tun_delroute(struct tun_t *this, |
| 615 | struct in_addr *dst, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 616 | struct in_addr *gateway, struct in_addr *mask) |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 617 | { |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 618 | return tun_route(this, dst, gateway, mask, 1); |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 619 | } |
| 620 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 621 | int tun_new(struct tun_t **tun) |
| 622 | { |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 623 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 624 | #if defined(__linux__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 625 | struct ifreq ifr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 626 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 627 | #elif defined(__FreeBSD__) || defined (__APPLE__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 628 | char devname[IFNAMSIZ + 5]; /* "/dev/" + ifname */ |
| 629 | int devnum; |
| 630 | struct ifaliasreq areq; |
| 631 | int fd; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 632 | |
| 633 | #elif defined(__sun__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 634 | int if_fd, ppa = -1; |
| 635 | static int ip_fd = 0; |
| 636 | int muxid; |
| 637 | struct ifreq ifr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 638 | |
jjako | 06e9f12 | 2004-01-19 18:37:58 +0000 | [diff] [blame] | 639 | #else |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 640 | #error "Unknown platform!" |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 641 | #endif |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 642 | |
| 643 | if (!(*tun = calloc(1, sizeof(struct tun_t)))) { |
| 644 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "calloc() failed"); |
| 645 | return EOF; |
| 646 | } |
| 647 | |
| 648 | (*tun)->cb_ind = NULL; |
| 649 | (*tun)->addrs = 0; |
| 650 | (*tun)->routes = 0; |
| 651 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 652 | #if defined(__linux__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 653 | /* Open the actual tun device */ |
| 654 | if (((*tun)->fd = open("/dev/net/tun", O_RDWR)) < 0) { |
| 655 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "open() failed"); |
| 656 | return -1; |
| 657 | } |
| 658 | |
| 659 | /* Set device flags. For some weird reason this is also the method |
| 660 | used to obtain the network interface name */ |
| 661 | memset(&ifr, 0, sizeof(ifr)); |
| 662 | ifr.ifr_flags = IFF_TUN | IFF_NO_PI; /* Tun device, no packet info */ |
| 663 | if (ioctl((*tun)->fd, TUNSETIFF, (void *)&ifr) < 0) { |
| 664 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "ioctl() failed"); |
| 665 | close((*tun)->fd); |
| 666 | return -1; |
| 667 | } |
| 668 | |
| 669 | strncpy((*tun)->devname, ifr.ifr_name, IFNAMSIZ); |
| 670 | (*tun)->devname[IFNAMSIZ - 1] = 0; |
| 671 | |
| 672 | ioctl((*tun)->fd, TUNSETNOCSUM, 1); /* Disable checksums */ |
| 673 | return 0; |
| 674 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 675 | #elif defined(__FreeBSD__) || defined (__APPLE__) |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 676 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 677 | /* Find suitable device */ |
| 678 | for (devnum = 0; devnum < 255; devnum++) { /* TODO 255 */ |
| 679 | snprintf(devname, sizeof(devname), "/dev/tun%d", devnum); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 680 | if (((*tun)->fd = open(devname, O_RDWR)) >= 0) |
| 681 | break; |
| 682 | if (errno != EBUSY) |
| 683 | break; |
| 684 | } |
| 685 | if ((*tun)->fd < 0) { |
| 686 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 687 | "Can't find tunnel device"); |
| 688 | return -1; |
| 689 | } |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 690 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 691 | snprintf((*tun)->devname, sizeof((*tun)->devname), "tun%d", devnum); |
| 692 | (*tun)->devname[sizeof((*tun)->devname)] = 0; |
jjako | 1f15864 | 2004-02-05 20:39:57 +0000 | [diff] [blame] | 693 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 694 | /* The tun device we found might have "old" IP addresses allocated */ |
| 695 | /* We need to delete those. This problem is not present on Linux */ |
jjako | 1f15864 | 2004-02-05 20:39:57 +0000 | [diff] [blame] | 696 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 697 | memset(&areq, 0, sizeof(areq)); |
jjako | 1f15864 | 2004-02-05 20:39:57 +0000 | [diff] [blame] | 698 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 699 | /* Set up interface name */ |
| 700 | strncpy(areq.ifra_name, (*tun)->devname, IFNAMSIZ); |
| 701 | areq.ifra_name[IFNAMSIZ - 1] = 0; /* Make sure to terminate */ |
jjako | 1f15864 | 2004-02-05 20:39:57 +0000 | [diff] [blame] | 702 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 703 | /* Create a channel to the NET kernel. */ |
| 704 | if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| 705 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "socket() failed"); |
| 706 | return -1; |
| 707 | } |
jjako | 1f15864 | 2004-02-05 20:39:57 +0000 | [diff] [blame] | 708 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 709 | /* Delete any IP addresses until SIOCDIFADDR fails */ |
| 710 | while (ioctl(fd, SIOCDIFADDR, (void *)&areq) != -1) ; |
| 711 | |
| 712 | close(fd); |
| 713 | return 0; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 714 | |
| 715 | #elif defined(__sun__) |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 716 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 717 | if ((ip_fd = open("/dev/udp", O_RDWR, 0)) < 0) { |
| 718 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 719 | "Can't open /dev/udp"); |
| 720 | return -1; |
| 721 | } |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 722 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 723 | if (((*tun)->fd = open("/dev/tun", O_RDWR, 0)) < 0) { |
| 724 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 725 | "Can't open /dev/tun"); |
| 726 | return -1; |
| 727 | } |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 728 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 729 | /* Assign a new PPA and get its unit number. */ |
| 730 | if ((ppa = ioctl((*tun)->fd, TUNNEWPPA, -1)) < 0) { |
| 731 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 732 | "Can't assign new interface"); |
| 733 | return -1; |
| 734 | } |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 735 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 736 | if ((if_fd = open("/dev/tun", O_RDWR, 0)) < 0) { |
| 737 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 738 | "Can't open /dev/tun (2)"); |
| 739 | return -1; |
| 740 | } |
| 741 | if (ioctl(if_fd, I_PUSH, "ip") < 0) { |
| 742 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 743 | "Can't push IP module"); |
| 744 | return -1; |
| 745 | } |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 746 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 747 | /* Assign ppa according to the unit number returned by tun device */ |
| 748 | if (ioctl(if_fd, IF_UNITSEL, (char *)&ppa) < 0) { |
| 749 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "Can't set PPA %d", |
| 750 | ppa); |
| 751 | return -1; |
| 752 | } |
| 753 | |
| 754 | /* Link the two streams */ |
| 755 | if ((muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0) { |
| 756 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 757 | "Can't link TUN device to IP"); |
| 758 | return -1; |
| 759 | } |
| 760 | |
| 761 | close(if_fd); |
| 762 | |
| 763 | snprintf((*tun)->devname, sizeof((*tun)->devname), "tun%d", ppa); |
| 764 | (*tun)->devname[sizeof((*tun)->devname)] = 0; |
| 765 | |
| 766 | memset(&ifr, 0, sizeof(ifr)); |
| 767 | strcpy(ifr.ifr_name, (*tun)->devname); |
| 768 | ifr.ifr_ip_muxid = muxid; |
| 769 | |
| 770 | if (ioctl(ip_fd, SIOCSIFMUXID, &ifr) < 0) { |
| 771 | ioctl(ip_fd, I_PUNLINK, muxid); |
| 772 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 773 | "Can't set multiplexor id"); |
| 774 | return -1; |
| 775 | } |
| 776 | |
| 777 | /* if (fcntl (fd, F_SETFL, O_NONBLOCK) < 0) |
| 778 | msg (M_ERR, "Set file descriptor to non-blocking failed"); */ |
| 779 | |
| 780 | return 0; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 781 | |
| 782 | #else |
| 783 | #error "Unknown platform!" |
| 784 | #endif |
| 785 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 786 | } |
| 787 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 788 | int tun_free(struct tun_t *tun) |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 789 | { |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 790 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 791 | if (tun->routes) { |
| 792 | tun_delroute(tun, &tun->dstaddr, &tun->addr, &tun->netmask); |
| 793 | } |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 794 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 795 | if (close(tun->fd)) { |
| 796 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "close() failed"); |
| 797 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 798 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 799 | /* TODO: For solaris we need to unlink streams */ |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 800 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 801 | free(tun); |
| 802 | return 0; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 803 | } |
| 804 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 805 | int tun_set_cb_ind(struct tun_t *this, |
| 806 | int (*cb_ind) (struct tun_t * tun, void *pack, unsigned len)) |
| 807 | { |
| 808 | this->cb_ind = cb_ind; |
| 809 | return 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 810 | } |
| 811 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 812 | int tun_decaps(struct tun_t *this) |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 813 | { |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 814 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 815 | #if defined(__linux__) || defined (__FreeBSD__) || defined (__APPLE__) |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 816 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 817 | unsigned char buffer[PACKET_MAX]; |
| 818 | int status; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 819 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 820 | if ((status = read(this->fd, buffer, sizeof(buffer))) <= 0) { |
| 821 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "read() failed"); |
| 822 | return -1; |
| 823 | } |
| 824 | |
| 825 | if (this->cb_ind) |
| 826 | return this->cb_ind(this, buffer, status); |
| 827 | |
| 828 | return 0; |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 829 | |
| 830 | #elif defined (__sun__) |
| 831 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 832 | unsigned char buffer[PACKET_MAX]; |
| 833 | struct strbuf sbuf; |
| 834 | int f = 0; |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 835 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 836 | sbuf.maxlen = PACKET_MAX; |
| 837 | sbuf.buf = buffer; |
| 838 | if (getmsg(this->fd, NULL, &sbuf, &f) < 0) { |
| 839 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, "getmsg() failed"); |
| 840 | return -1; |
| 841 | } |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 842 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 843 | if (this->cb_ind) |
| 844 | return this->cb_ind(this, buffer, sbuf.len); |
| 845 | |
| 846 | return 0; |
| 847 | |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 848 | #endif |
| 849 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 850 | } |
| 851 | |
| 852 | int tun_encaps(struct tun_t *tun, void *pack, unsigned len) |
| 853 | { |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 854 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 855 | #if defined(__linux__) || defined (__FreeBSD__) || defined (__APPLE__) |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 856 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 857 | return write(tun->fd, pack, len); |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 858 | |
| 859 | #elif defined (__sun__) |
| 860 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 861 | struct strbuf sbuf; |
| 862 | sbuf.len = len; |
| 863 | sbuf.buf = pack; |
| 864 | return putmsg(tun->fd, NULL, &sbuf, 0); |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 865 | |
| 866 | #endif |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 867 | } |
| 868 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 869 | int tun_runscript(struct tun_t *tun, char *script) |
| 870 | { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 871 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 872 | char buf[TUN_SCRIPTSIZE]; |
| 873 | char snet[TUN_ADDRSIZE]; |
| 874 | char smask[TUN_ADDRSIZE]; |
| 875 | int rc; |
| 876 | |
| 877 | strncpy(snet, inet_ntoa(tun->addr), sizeof(snet)); |
| 878 | snet[sizeof(snet) - 1] = 0; |
| 879 | strncpy(smask, inet_ntoa(tun->netmask), sizeof(smask)); |
| 880 | smask[sizeof(smask) - 1] = 0; |
| 881 | |
| 882 | /* system("ipup /dev/tun0 192.168.0.10 255.255.255.0"); */ |
| 883 | snprintf(buf, sizeof(buf), "%s %s %s %s", |
| 884 | script, tun->devname, snet, smask); |
| 885 | buf[sizeof(buf) - 1] = 0; |
| 886 | rc = system(buf); |
| 887 | if (rc == -1) { |
| 888 | sys_err(LOG_ERR, __FILE__, __LINE__, errno, |
| 889 | "Error executing command %s", buf); |
| 890 | return -1; |
| 891 | } |
| 892 | return 0; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 893 | } |