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. |
Harald Welte | 2e48a44 | 2017-08-03 00:47:03 +0200 | [diff] [blame] | 4 | * Copyright (C) 2017 by Harald Welte <laforge@gnumonks.org> |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 5 | * |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 6 | * The contents of this file may be used under the terms of the GNU |
| 7 | * General Public License Version 2, provided that the above copyright |
| 8 | * notice and this permission notice is included in all copies or |
| 9 | * substantial portions of the software. |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 10 | * |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 11 | */ |
| 12 | |
| 13 | /* |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 14 | * tun.c: Contains all TUN functionality. Is able to handle multiple |
| 15 | * tunnels in the same program. Each tunnel is identified by the struct, |
| 16 | * which is passed to functions. |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 17 | * |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 18 | */ |
| 19 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 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> |
Harald Welte | 2e48a44 | 2017-08-03 00:47:03 +0200 | [diff] [blame] | 41 | #include <net/if.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_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__) |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 49 | #include <net/if_tun.h> |
Harald Welte | 2e48a44 | 2017-08-03 00:47:03 +0200 | [diff] [blame] | 50 | #include <net/if_var.h> |
| 51 | #include <netinet/in_var.h> |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 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 | #include "tun.h" |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 68 | #include "syserr.h" |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 69 | |
Harald Welte | 2e48a44 | 2017-08-03 00:47:03 +0200 | [diff] [blame] | 70 | static int tun_setaddr4(struct tun_t *this, struct in_addr *addr, |
| 71 | struct in_addr *dstaddr, struct in_addr *netmask); |
| 72 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 73 | #if defined(__linux__) |
| 74 | |
Harald Welte | 2e48a44 | 2017-08-03 00:47:03 +0200 | [diff] [blame] | 75 | #include <linux/ipv6.h> |
| 76 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 77 | 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] | 78 | { |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 79 | int len = RTA_LENGTH(dlen); |
| 80 | int alen = NLMSG_ALIGN(n->nlmsg_len); |
| 81 | struct rtattr *rta = (struct rtattr *)(((void *)n) + alen); |
| 82 | if (alen + len > nsize) |
| 83 | return -1; |
| 84 | rta->rta_len = len; |
| 85 | rta->rta_type = type; |
| 86 | memcpy(RTA_DATA(rta), d, dlen); |
| 87 | n->nlmsg_len = alen + len; |
| 88 | return 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 89 | } |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 90 | #endif |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 91 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 92 | int tun_sifflags(struct tun_t *this, int flags) |
| 93 | { |
| 94 | struct ifreq ifr; |
| 95 | int fd; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 96 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 97 | memset(&ifr, '\0', sizeof(ifr)); |
| 98 | ifr.ifr_flags = flags; |
| 99 | strncpy(ifr.ifr_name, this->devname, IFNAMSIZ); |
| 100 | ifr.ifr_name[IFNAMSIZ - 1] = 0; /* Make sure to terminate */ |
| 101 | if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 102 | SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed"); |
Michael McTernan | b07d070 | 2015-05-02 07:52:23 +0200 | [diff] [blame] | 103 | return -1; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 104 | } |
| 105 | if (ioctl(fd, SIOCSIFFLAGS, &ifr)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 106 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 107 | "ioctl(SIOCSIFFLAGS) failed"); |
| 108 | close(fd); |
| 109 | return -1; |
| 110 | } |
| 111 | close(fd); |
| 112 | return 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 113 | } |
| 114 | |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 115 | /* Currently unused |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 116 | int tun_addroute2(struct tun_t *this, |
| 117 | struct in_addr *dst, |
| 118 | struct in_addr *gateway, |
| 119 | struct in_addr *mask) { |
| 120 | |
| 121 | struct { |
| 122 | struct nlmsghdr n; |
| 123 | struct rtmsg r; |
| 124 | char buf[TUN_NLBUFSIZE]; |
| 125 | } req; |
| 126 | |
| 127 | struct sockaddr_nl local; |
| 128 | int addr_len; |
| 129 | int fd; |
| 130 | int status; |
| 131 | struct sockaddr_nl nladdr; |
| 132 | struct iovec iov; |
| 133 | struct msghdr msg; |
| 134 | |
| 135 | memset(&req, 0, sizeof(req)); |
| 136 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
| 137 | req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE; |
| 138 | req.n.nlmsg_type = RTM_NEWROUTE; |
| 139 | req.r.rtm_family = AF_INET; |
| 140 | req.r.rtm_table = RT_TABLE_MAIN; |
| 141 | req.r.rtm_protocol = RTPROT_BOOT; |
| 142 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
| 143 | req.r.rtm_type = RTN_UNICAST; |
| 144 | tun_nlattr(&req.n, sizeof(req), RTA_DST, dst, 4); |
| 145 | tun_nlattr(&req.n, sizeof(req), RTA_GATEWAY, gateway, 4); |
| 146 | |
| 147 | if ((fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 148 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 149 | "socket() failed"); |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 150 | return -1; |
| 151 | } |
| 152 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 153 | memset(&local, 0, sizeof(local)); |
| 154 | local.nl_family = AF_NETLINK; |
| 155 | local.nl_groups = 0; |
| 156 | |
| 157 | if (bind(fd, (struct sockaddr*)&local, sizeof(local)) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 158 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 159 | "bind() failed"); |
| 160 | close(fd); |
| 161 | return -1; |
| 162 | } |
| 163 | |
| 164 | addr_len = sizeof(local); |
| 165 | if (getsockname(fd, (struct sockaddr*)&local, &addr_len) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 166 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 167 | "getsockname() failed"); |
| 168 | close(fd); |
| 169 | return -1; |
| 170 | } |
| 171 | |
| 172 | if (addr_len != sizeof(local)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 173 | SYS_ERR(DTUN, LOGL_ERROR, 0, |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 174 | "Wrong address length %d", addr_len); |
| 175 | close(fd); |
| 176 | return -1; |
| 177 | } |
| 178 | |
| 179 | if (local.nl_family != AF_NETLINK) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 180 | SYS_ERR(DTUN, LOGL_ERROR, 0, |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 181 | "Wrong address family %d", local.nl_family); |
| 182 | close(fd); |
| 183 | return -1; |
| 184 | } |
| 185 | |
| 186 | iov.iov_base = (void*)&req.n; |
| 187 | iov.iov_len = req.n.nlmsg_len; |
| 188 | |
| 189 | msg.msg_name = (void*)&nladdr; |
| 190 | msg.msg_namelen = sizeof(nladdr), |
| 191 | msg.msg_iov = &iov; |
| 192 | msg.msg_iovlen = 1; |
| 193 | msg.msg_control = NULL; |
| 194 | msg.msg_controllen = 0; |
| 195 | msg.msg_flags = 0; |
| 196 | |
| 197 | memset(&nladdr, 0, sizeof(nladdr)); |
| 198 | nladdr.nl_family = AF_NETLINK; |
| 199 | nladdr.nl_pid = 0; |
| 200 | nladdr.nl_groups = 0; |
| 201 | |
| 202 | req.n.nlmsg_seq = 0; |
| 203 | req.n.nlmsg_flags |= NLM_F_ACK; |
| 204 | |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 205 | status = sendmsg(fd, &msg, 0); * TODO: Error check * |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 206 | close(fd); |
| 207 | return 0; |
| 208 | } |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 209 | */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 210 | |
| 211 | int tun_addaddr(struct tun_t *this, |
| 212 | struct in_addr *addr, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 213 | struct in_addr *dstaddr, struct in_addr *netmask) |
| 214 | { |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 215 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 216 | #if defined(__linux__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 217 | struct { |
| 218 | struct nlmsghdr n; |
| 219 | struct ifaddrmsg i; |
| 220 | char buf[TUN_NLBUFSIZE]; |
| 221 | } req; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 222 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 223 | struct sockaddr_nl local; |
| 224 | socklen_t addr_len; |
| 225 | int fd; |
| 226 | int status; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 227 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 228 | struct sockaddr_nl nladdr; |
| 229 | struct iovec iov; |
| 230 | struct msghdr msg; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 231 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 232 | if (!this->addrs) /* Use ioctl for first addr to make ping work */ |
Harald Welte | 2e48a44 | 2017-08-03 00:47:03 +0200 | [diff] [blame] | 233 | return tun_setaddr4(this, addr, dstaddr, netmask); |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 234 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 235 | memset(&req, 0, sizeof(req)); |
| 236 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)); |
| 237 | req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE; |
| 238 | req.n.nlmsg_type = RTM_NEWADDR; |
| 239 | req.i.ifa_family = AF_INET; |
| 240 | req.i.ifa_prefixlen = 32; /* 32 FOR IPv4 */ |
| 241 | req.i.ifa_flags = 0; |
| 242 | req.i.ifa_scope = RT_SCOPE_HOST; /* TODO or 0 */ |
Harald Welte | ab6d189 | 2017-08-11 12:31:59 +0200 | [diff] [blame] | 243 | req.i.ifa_index = if_nametoindex(this->devname); |
| 244 | if (!req.i.ifa_index) { |
| 245 | SYS_ERR(DTUN, LOGL_ERROR, errno, "Unable to get ifindex for %s", this->devname); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 246 | return -1; |
| 247 | } |
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 | tun_nlattr(&req.n, sizeof(req), IFA_ADDRESS, addr, sizeof(addr)); |
| 250 | tun_nlattr(&req.n, sizeof(req), IFA_LOCAL, dstaddr, sizeof(dstaddr)); |
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 | if ((fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 253 | SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 254 | return -1; |
| 255 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 256 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 257 | memset(&local, 0, sizeof(local)); |
| 258 | local.nl_family = AF_NETLINK; |
| 259 | local.nl_groups = 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 260 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 261 | if (bind(fd, (struct sockaddr *)&local, sizeof(local)) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 262 | SYS_ERR(DTUN, LOGL_ERROR, errno, "bind() failed"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 263 | close(fd); |
| 264 | return -1; |
| 265 | } |
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 | addr_len = sizeof(local); |
| 268 | if (getsockname(fd, (struct sockaddr *)&local, &addr_len) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 269 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 270 | "getsockname() failed"); |
| 271 | close(fd); |
| 272 | return -1; |
| 273 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 274 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 275 | if (addr_len != sizeof(local)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 276 | SYS_ERR(DTUN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 277 | "Wrong address length %d", addr_len); |
| 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 | if (local.nl_family != AF_NETLINK) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 283 | SYS_ERR(DTUN, LOGL_ERROR, 0, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 284 | "Wrong address family %d", local.nl_family); |
| 285 | close(fd); |
| 286 | return -1; |
| 287 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 288 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 289 | iov.iov_base = (void *)&req.n; |
| 290 | iov.iov_len = req.n.nlmsg_len; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 291 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 292 | msg.msg_name = (void *)&nladdr; |
Michael McTernan | b07d070 | 2015-05-02 07:52:23 +0200 | [diff] [blame] | 293 | msg.msg_namelen = sizeof(nladdr); |
| 294 | msg.msg_iov = &iov; |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 295 | msg.msg_iovlen = 1; |
| 296 | msg.msg_control = NULL; |
| 297 | msg.msg_controllen = 0; |
| 298 | msg.msg_flags = 0; |
| 299 | |
| 300 | memset(&nladdr, 0, sizeof(nladdr)); |
| 301 | nladdr.nl_family = AF_NETLINK; |
| 302 | nladdr.nl_pid = 0; |
| 303 | nladdr.nl_groups = 0; |
| 304 | |
| 305 | req.n.nlmsg_seq = 0; |
| 306 | req.n.nlmsg_flags |= NLM_F_ACK; |
| 307 | |
Michael McTernan | b07d070 | 2015-05-02 07:52:23 +0200 | [diff] [blame] | 308 | status = sendmsg(fd, &msg, 0); |
| 309 | if (status != req.n.nlmsg_len) { |
| 310 | SYS_ERR(DTUN, LOGL_ERROR, errno, "sendmsg() failed, returned %d", status); |
| 311 | close(fd); |
| 312 | return -1; |
| 313 | } |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 314 | |
Michael McTernan | b07d070 | 2015-05-02 07:52:23 +0200 | [diff] [blame] | 315 | status = tun_sifflags(this, IFF_UP | IFF_RUNNING); |
| 316 | if (status == -1) { |
| 317 | close(fd); |
| 318 | return -1; |
| 319 | } |
| 320 | |
| 321 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 322 | close(fd); |
| 323 | this->addrs++; |
| 324 | return 0; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 325 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 326 | #elif defined (__FreeBSD__) || defined (__APPLE__) |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 327 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 328 | int fd; |
| 329 | struct ifaliasreq areq; |
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 | /* TODO: Is this needed on FreeBSD? */ |
| 332 | if (!this->addrs) /* Use ioctl for first addr to make ping work */ |
Harald Welte | 2e48a44 | 2017-08-03 00:47:03 +0200 | [diff] [blame] | 333 | return tun_setaddr4(this, addr, dstaddr, netmask); /* TODO dstaddr */ |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 334 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 335 | memset(&areq, 0, sizeof(areq)); |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 336 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 337 | /* Set up interface name */ |
| 338 | strncpy(areq.ifra_name, this->devname, IFNAMSIZ); |
| 339 | areq.ifra_name[IFNAMSIZ - 1] = 0; /* Make sure to terminate */ |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 340 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 341 | ((struct sockaddr_in *)&areq.ifra_addr)->sin_family = AF_INET; |
| 342 | ((struct sockaddr_in *)&areq.ifra_addr)->sin_len = |
| 343 | sizeof(areq.ifra_addr); |
| 344 | ((struct sockaddr_in *)&areq.ifra_addr)->sin_addr.s_addr = addr->s_addr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 345 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 346 | ((struct sockaddr_in *)&areq.ifra_mask)->sin_family = AF_INET; |
| 347 | ((struct sockaddr_in *)&areq.ifra_mask)->sin_len = |
| 348 | sizeof(areq.ifra_mask); |
| 349 | ((struct sockaddr_in *)&areq.ifra_mask)->sin_addr.s_addr = |
| 350 | netmask->s_addr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 351 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 352 | /* For some reason FreeBSD uses ifra_broadcast for specifying dstaddr */ |
| 353 | ((struct sockaddr_in *)&areq.ifra_broadaddr)->sin_family = AF_INET; |
| 354 | ((struct sockaddr_in *)&areq.ifra_broadaddr)->sin_len = |
| 355 | sizeof(areq.ifra_broadaddr); |
| 356 | ((struct sockaddr_in *)&areq.ifra_broadaddr)->sin_addr.s_addr = |
| 357 | dstaddr->s_addr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 358 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 359 | /* Create a channel to the NET kernel. */ |
| 360 | if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 361 | SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 362 | return -1; |
| 363 | } |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 364 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 365 | if (ioctl(fd, SIOCAIFADDR, (void *)&areq) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 366 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 367 | "ioctl(SIOCAIFADDR) failed"); |
| 368 | close(fd); |
| 369 | return -1; |
| 370 | } |
| 371 | |
| 372 | close(fd); |
| 373 | this->addrs++; |
| 374 | return 0; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 375 | |
| 376 | #elif defined (__sun__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 377 | |
| 378 | if (!this->addrs) /* Use ioctl for first addr to make ping work */ |
Harald Welte | 2e48a44 | 2017-08-03 00:47:03 +0200 | [diff] [blame] | 379 | return tun_setaddr4(this, addr, dstaddr, netmask); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 380 | |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 381 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 382 | "Setting multiple addresses not possible on Solaris"); |
| 383 | return -1; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 384 | |
| 385 | #else |
| 386 | #error "Unknown platform!" |
jjako | 0141d20 | 2004-01-09 15:19:20 +0000 | [diff] [blame] | 387 | #endif |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 388 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 389 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 390 | |
Harald Welte | 2e48a44 | 2017-08-03 00:47:03 +0200 | [diff] [blame] | 391 | static int tun_setaddr4(struct tun_t *this, struct in_addr *addr, |
| 392 | struct in_addr *dstaddr, struct in_addr *netmask) |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 393 | { |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 394 | struct ifreq ifr; |
| 395 | int fd; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 396 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 397 | memset(&ifr, '\0', sizeof(ifr)); |
| 398 | ifr.ifr_addr.sa_family = AF_INET; |
| 399 | ifr.ifr_dstaddr.sa_family = AF_INET; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 400 | |
| 401 | #if defined(__linux__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 402 | ifr.ifr_netmask.sa_family = AF_INET; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 403 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 404 | #elif defined(__FreeBSD__) || defined (__APPLE__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 405 | ((struct sockaddr_in *)&ifr.ifr_addr)->sin_len = |
| 406 | sizeof(struct sockaddr_in); |
| 407 | ((struct sockaddr_in *)&ifr.ifr_dstaddr)->sin_len = |
| 408 | sizeof(struct sockaddr_in); |
jjako | 243bfe6 | 2004-01-26 23:06:05 +0000 | [diff] [blame] | 409 | #endif |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 410 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 411 | strncpy(ifr.ifr_name, this->devname, IFNAMSIZ); |
| 412 | ifr.ifr_name[IFNAMSIZ - 1] = 0; /* Make sure to terminate */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 413 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 414 | /* Create a channel to the NET kernel. */ |
| 415 | if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 416 | SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 417 | return -1; |
| 418 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 419 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 420 | if (addr) { /* Set the interface address */ |
| 421 | this->addr.s_addr = addr->s_addr; |
| 422 | memcpy(&((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr, addr, |
| 423 | sizeof(*addr)); |
| 424 | if (ioctl(fd, SIOCSIFADDR, (void *)&ifr) < 0) { |
| 425 | if (errno != EEXIST) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 426 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 427 | "ioctl(SIOCSIFADDR) failed"); |
| 428 | } else { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 429 | SYS_ERR(DTUN, LOGL_NOTICE, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 430 | "ioctl(SIOCSIFADDR): Address already exists"); |
| 431 | } |
| 432 | close(fd); |
| 433 | return -1; |
| 434 | } |
| 435 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 436 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 437 | if (dstaddr) { /* Set the destination address */ |
| 438 | this->dstaddr.s_addr = dstaddr->s_addr; |
| 439 | memcpy(&((struct sockaddr_in *)&ifr.ifr_dstaddr)->sin_addr, |
| 440 | dstaddr, sizeof(*dstaddr)); |
| 441 | if (ioctl(fd, SIOCSIFDSTADDR, (caddr_t) & ifr) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 442 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 443 | "ioctl(SIOCSIFDSTADDR) failed"); |
| 444 | close(fd); |
| 445 | return -1; |
| 446 | } |
| 447 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 448 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 449 | if (netmask) { /* Set the netmask */ |
| 450 | this->netmask.s_addr = netmask->s_addr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 451 | #if defined(__linux__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 452 | memcpy(&((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr, |
| 453 | netmask, sizeof(*netmask)); |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 454 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 455 | #elif defined(__FreeBSD__) || defined (__APPLE__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 456 | ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr = |
| 457 | netmask->s_addr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 458 | |
| 459 | #elif defined(__sun__) |
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 | #else |
| 463 | #error "Unknown platform!" |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 464 | #endif |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 465 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 466 | if (ioctl(fd, SIOCSIFNETMASK, (void *)&ifr) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 467 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 468 | "ioctl(SIOCSIFNETMASK) failed"); |
| 469 | close(fd); |
| 470 | return -1; |
| 471 | } |
| 472 | } |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 473 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 474 | close(fd); |
| 475 | this->addrs++; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 476 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 477 | /* On linux the route to the interface is set automatically |
| 478 | on FreeBSD we have to do this manually */ |
| 479 | |
| 480 | /* TODO: How does it work on Solaris? */ |
| 481 | |
| 482 | tun_sifflags(this, IFF_UP | IFF_RUNNING); |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 483 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 484 | #if defined(__FreeBSD__) || defined (__APPLE__) |
Harald Welte | 2e48a44 | 2017-08-03 00:47:03 +0200 | [diff] [blame] | 485 | tun_addroute(this, dstaddr, addr, &this->netmask); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 486 | this->routes = 1; |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 487 | #endif |
| 488 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 489 | return 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 490 | } |
| 491 | |
Harald Welte | 2e48a44 | 2017-08-03 00:47:03 +0200 | [diff] [blame] | 492 | static int tun_setaddr6(struct tun_t *this, struct in6_addr *addr, struct in6_addr *dstaddr, |
| 493 | size_t prefixlen) |
| 494 | { |
| 495 | struct in6_ifreq ifr; |
| 496 | int fd; |
| 497 | |
| 498 | memset(&ifr, 0, sizeof(ifr)); |
| 499 | |
| 500 | #if defined(__linux__) |
| 501 | ifr.ifr6_prefixlen = prefixlen; |
| 502 | ifr.ifr6_ifindex = if_nametoindex(this->devname); |
| 503 | if (ifr.ifr6_ifindex == 0) { |
| 504 | SYS_ERR(DTUN, LOGL_ERROR, 0, "Error getting ifindex for %s\n", this->devname); |
| 505 | return -1; |
| 506 | } |
| 507 | #elif defined(__FreeBSD__) || defined (__APPLE__) |
| 508 | strncpy(ifr.ifr_name, this->devname, IFNAMSIZ); |
| 509 | #endif |
| 510 | |
| 511 | /* Create a channel to the NET kernel */ |
| 512 | if ((fd = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { |
| 513 | SYS_ERR(DTUN, LOGL_ERROR, 0, "socket() failed"); |
| 514 | return -1; |
| 515 | } |
| 516 | |
| 517 | #if defined(__linux__) |
| 518 | if (addr) { |
| 519 | memcpy(&this->addr, addr, sizeof(*addr)); |
| 520 | memcpy(&ifr.ifr6_addr, addr, sizeof(*addr)); |
| 521 | if (ioctl(fd, SIOCSIFADDR, (void *) &ifr) < 0) { |
| 522 | if (errno != EEXIST) { |
| 523 | SYS_ERR(DTUN, LOGL_ERROR, 0, "ioctl(SIOCSIFADDR) failed"); |
| 524 | } else { |
| 525 | SYS_ERR(DTUN, LOGL_NOTICE, 0, "ioctl(SIOCSIFADDR): Address alreadsy exists"); |
| 526 | } |
| 527 | close(fd); |
| 528 | return -1; |
| 529 | } |
| 530 | } |
| 531 | |
| 532 | #if 0 |
| 533 | /* FIXME: looks like this is not possible/necessary for IPv6? */ |
| 534 | if (dstaddr) { |
| 535 | memcpy(&this->dstaddr, dstaddr, sizeof(*dstaddr)); |
| 536 | memcpy(&ifr.ifr6_addr, dstaddr, sizeof(*dstaddr)); |
| 537 | if (ioctl(fd, SIOCSIFDSTADDR, (caddr_t *) &ifr) < 0) { |
| 538 | SYS_ERR(DTUN, LOGL_ERROR, "ioctl(SIOCSIFDSTADDR) failed"); |
| 539 | close(fd); |
| 540 | return -1; |
| 541 | } |
| 542 | } |
| 543 | #endif |
| 544 | |
| 545 | #elif defined(__FreeBSD__) || defined (__APPLE__) |
| 546 | if (addr) |
| 547 | memcpy(&ifr.ifr_ifru.ifru_addr, addr, sizeof(ifr.ifr_ifru.ifru_addr)); |
| 548 | if (dstaddr) |
| 549 | memcpy(&ifr.ifr_ifru.ifru_dstaddr, dstaddr, sizeof(ifr.ifr_ifru.ifru_dstaddr)); |
| 550 | |
| 551 | if (ioctl(fd, SIOCSIFADDR_IN6, (struct ifreq *)&ifr) < 0) { |
| 552 | SYS_ERR(DTUN, LOGL_ERROR, 0, "ioctl(SIOCSIFADDR_IN6) failed"); |
| 553 | close(fd); |
| 554 | return -1; |
| 555 | } |
| 556 | #endif |
| 557 | |
| 558 | close(fd); |
| 559 | this->addrs++; |
| 560 | |
| 561 | /* On linux the route to the interface is set automatically |
| 562 | on FreeBSD we have to do this manually */ |
| 563 | |
| 564 | /* TODO: How does it work on Solaris? */ |
| 565 | |
| 566 | tun_sifflags(this, IFF_UP | IFF_RUNNING); |
| 567 | |
| 568 | #if 0 /* FIXME */ |
| 569 | //#if defined(__FreeBSD__) || defined (__APPLE__) |
| 570 | tun_addroute6(this, dstaddr, addr, prefixlen); |
| 571 | this->routes = 1; |
| 572 | #endif |
| 573 | |
| 574 | return 0; |
| 575 | } |
| 576 | |
| 577 | int tun_setaddr(struct tun_t *this, struct in46_addr *addr, struct in46_addr *dstaddr, size_t prefixlen) |
| 578 | { |
| 579 | struct in_addr netmask; |
| 580 | switch (addr->len) { |
| 581 | case 4: |
| 582 | netmask.s_addr = htonl(0xffffffff << (32 - prefixlen)); |
| 583 | return tun_setaddr4(this, &addr->v4, dstaddr ? &dstaddr->v4 : NULL, &netmask); |
| 584 | case 16: |
| 585 | return tun_setaddr6(this, &addr->v6, dstaddr ? &dstaddr->v6 : NULL, prefixlen); |
| 586 | default: |
| 587 | return -1; |
| 588 | } |
| 589 | } |
| 590 | |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 591 | int tun_route(struct tun_t *this, |
| 592 | struct in_addr *dst, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 593 | struct in_addr *gateway, struct in_addr *mask, int delete) |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 594 | { |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 595 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 596 | /* TODO: Learn how to set routing table on sun */ |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 597 | |
| 598 | #if defined(__linux__) |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 599 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 600 | struct rtentry r; |
| 601 | int fd; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 602 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 603 | memset(&r, '\0', sizeof(r)); |
| 604 | r.rt_flags = RTF_UP | RTF_GATEWAY; /* RTF_HOST not set */ |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 605 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 606 | /* Create a channel to the NET kernel. */ |
| 607 | if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 608 | SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 609 | return -1; |
| 610 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 611 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 612 | r.rt_dst.sa_family = AF_INET; |
| 613 | r.rt_gateway.sa_family = AF_INET; |
| 614 | r.rt_genmask.sa_family = AF_INET; |
| 615 | memcpy(&((struct sockaddr_in *)&r.rt_dst)->sin_addr, dst, sizeof(*dst)); |
| 616 | memcpy(&((struct sockaddr_in *)&r.rt_gateway)->sin_addr, gateway, |
| 617 | sizeof(*gateway)); |
| 618 | memcpy(&((struct sockaddr_in *)&r.rt_genmask)->sin_addr, mask, |
| 619 | sizeof(*mask)); |
| 620 | |
| 621 | if (delete) { |
| 622 | if (ioctl(fd, SIOCDELRT, (void *)&r) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 623 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 624 | "ioctl(SIOCDELRT) failed"); |
| 625 | close(fd); |
| 626 | return -1; |
| 627 | } |
| 628 | } else { |
| 629 | if (ioctl(fd, SIOCADDRT, (void *)&r) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 630 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 631 | "ioctl(SIOCADDRT) failed"); |
| 632 | close(fd); |
| 633 | return -1; |
| 634 | } |
| 635 | } |
| 636 | close(fd); |
| 637 | return 0; |
| 638 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 639 | #elif defined(__FreeBSD__) || defined (__APPLE__) |
jjako | 3eaf453 | 2004-01-27 19:47:49 +0000 | [diff] [blame] | 640 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 641 | struct { |
| 642 | struct rt_msghdr rt; |
| 643 | struct sockaddr_in dst; |
| 644 | struct sockaddr_in gate; |
| 645 | struct sockaddr_in mask; |
| 646 | } req; |
jjako | 3eaf453 | 2004-01-27 19:47:49 +0000 | [diff] [blame] | 647 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 648 | int fd; |
| 649 | struct rt_msghdr *rtm; |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 650 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 651 | if ((fd = socket(AF_ROUTE, SOCK_RAW, 0)) == -1) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 652 | SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 653 | return -1; |
| 654 | } |
| 655 | |
| 656 | memset(&req, 0x00, sizeof(req)); |
| 657 | |
| 658 | rtm = &req.rt; |
| 659 | |
| 660 | rtm->rtm_msglen = sizeof(req); |
| 661 | rtm->rtm_version = RTM_VERSION; |
| 662 | if (delete) { |
| 663 | rtm->rtm_type = RTM_DELETE; |
| 664 | } else { |
| 665 | rtm->rtm_type = RTM_ADD; |
| 666 | } |
| 667 | rtm->rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC; /* TODO */ |
| 668 | rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; |
| 669 | rtm->rtm_pid = getpid(); |
| 670 | rtm->rtm_seq = 0044; /* TODO */ |
| 671 | |
| 672 | req.dst.sin_family = AF_INET; |
| 673 | req.dst.sin_len = sizeof(req.dst); |
| 674 | req.mask.sin_family = AF_INET; |
| 675 | req.mask.sin_len = sizeof(req.mask); |
| 676 | req.gate.sin_family = AF_INET; |
| 677 | req.gate.sin_len = sizeof(req.gate); |
| 678 | |
| 679 | req.dst.sin_addr.s_addr = dst->s_addr; |
| 680 | req.mask.sin_addr.s_addr = mask->s_addr; |
| 681 | req.gate.sin_addr.s_addr = gateway->s_addr; |
| 682 | |
| 683 | if (write(fd, rtm, rtm->rtm_msglen) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 684 | SYS_ERR(DTUN, LOGL_ERROR, errno, "write() failed"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 685 | close(fd); |
| 686 | return -1; |
| 687 | } |
| 688 | close(fd); |
| 689 | return 0; |
jjako | 1ea6634 | 2004-01-28 09:27:34 +0000 | [diff] [blame] | 690 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 691 | #elif defined(__sun__) |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 692 | SYS_ERR(DTUN, LOGL_NOTICE, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 693 | "Could not set up routing on Solaris. Please add route manually."); |
| 694 | return 0; |
| 695 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 696 | #else |
| 697 | #error "Unknown platform!" |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 698 | #endif |
| 699 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 700 | } |
| 701 | |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 702 | int tun_addroute(struct tun_t *this, |
| 703 | struct in_addr *dst, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 704 | struct in_addr *gateway, struct in_addr *mask) |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 705 | { |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 706 | return tun_route(this, dst, gateway, mask, 0); |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 707 | } |
| 708 | |
| 709 | int tun_delroute(struct tun_t *this, |
| 710 | struct in_addr *dst, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 711 | struct in_addr *gateway, struct in_addr *mask) |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 712 | { |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 713 | return tun_route(this, dst, gateway, mask, 1); |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 714 | } |
| 715 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 716 | int tun_new(struct tun_t **tun) |
| 717 | { |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 718 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 719 | #if defined(__linux__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 720 | struct ifreq ifr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 721 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 722 | #elif defined(__FreeBSD__) || defined (__APPLE__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 723 | char devname[IFNAMSIZ + 5]; /* "/dev/" + ifname */ |
| 724 | int devnum; |
| 725 | struct ifaliasreq areq; |
| 726 | int fd; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 727 | |
| 728 | #elif defined(__sun__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 729 | int if_fd, ppa = -1; |
| 730 | static int ip_fd = 0; |
| 731 | int muxid; |
| 732 | struct ifreq ifr; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 733 | |
jjako | 06e9f12 | 2004-01-19 18:37:58 +0000 | [diff] [blame] | 734 | #else |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 735 | #error "Unknown platform!" |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 736 | #endif |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 737 | |
| 738 | if (!(*tun = calloc(1, sizeof(struct tun_t)))) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 739 | SYS_ERR(DTUN, LOGL_ERROR, errno, "calloc() failed"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 740 | return EOF; |
| 741 | } |
| 742 | |
| 743 | (*tun)->cb_ind = NULL; |
| 744 | (*tun)->addrs = 0; |
| 745 | (*tun)->routes = 0; |
| 746 | |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 747 | #if defined(__linux__) |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 748 | /* Open the actual tun device */ |
| 749 | if (((*tun)->fd = open("/dev/net/tun", O_RDWR)) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 750 | SYS_ERR(DTUN, LOGL_ERROR, errno, "open() failed"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 751 | return -1; |
| 752 | } |
| 753 | |
| 754 | /* Set device flags. For some weird reason this is also the method |
| 755 | used to obtain the network interface name */ |
| 756 | memset(&ifr, 0, sizeof(ifr)); |
| 757 | ifr.ifr_flags = IFF_TUN | IFF_NO_PI; /* Tun device, no packet info */ |
| 758 | if (ioctl((*tun)->fd, TUNSETIFF, (void *)&ifr) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 759 | SYS_ERR(DTUN, LOGL_ERROR, errno, "ioctl() failed"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 760 | close((*tun)->fd); |
| 761 | return -1; |
| 762 | } |
| 763 | |
| 764 | strncpy((*tun)->devname, ifr.ifr_name, IFNAMSIZ); |
| 765 | (*tun)->devname[IFNAMSIZ - 1] = 0; |
| 766 | |
| 767 | ioctl((*tun)->fd, TUNSETNOCSUM, 1); /* Disable checksums */ |
| 768 | return 0; |
| 769 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 770 | #elif defined(__FreeBSD__) || defined (__APPLE__) |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 771 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 772 | /* Find suitable device */ |
| 773 | for (devnum = 0; devnum < 255; devnum++) { /* TODO 255 */ |
| 774 | snprintf(devname, sizeof(devname), "/dev/tun%d", devnum); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 775 | if (((*tun)->fd = open(devname, O_RDWR)) >= 0) |
| 776 | break; |
| 777 | if (errno != EBUSY) |
| 778 | break; |
| 779 | } |
| 780 | if ((*tun)->fd < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 781 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 782 | "Can't find tunnel device"); |
| 783 | return -1; |
| 784 | } |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 785 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 786 | snprintf((*tun)->devname, sizeof((*tun)->devname), "tun%d", devnum); |
Harald Welte | 81bc2ae | 2017-08-11 12:56:30 +0200 | [diff] [blame] | 787 | (*tun)->devname[sizeof((*tun)->devname)-1] = 0; |
jjako | 1f15864 | 2004-02-05 20:39:57 +0000 | [diff] [blame] | 788 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 789 | /* The tun device we found might have "old" IP addresses allocated */ |
| 790 | /* We need to delete those. This problem is not present on Linux */ |
jjako | 1f15864 | 2004-02-05 20:39:57 +0000 | [diff] [blame] | 791 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 792 | memset(&areq, 0, sizeof(areq)); |
jjako | 1f15864 | 2004-02-05 20:39:57 +0000 | [diff] [blame] | 793 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 794 | /* Set up interface name */ |
| 795 | strncpy(areq.ifra_name, (*tun)->devname, IFNAMSIZ); |
| 796 | areq.ifra_name[IFNAMSIZ - 1] = 0; /* Make sure to terminate */ |
jjako | 1f15864 | 2004-02-05 20:39:57 +0000 | [diff] [blame] | 797 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 798 | /* Create a channel to the NET kernel. */ |
| 799 | if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 800 | SYS_ERR(DTUN, LOGL_ERROR, errno, "socket() failed"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 801 | return -1; |
| 802 | } |
jjako | 1f15864 | 2004-02-05 20:39:57 +0000 | [diff] [blame] | 803 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 804 | /* Delete any IP addresses until SIOCDIFADDR fails */ |
| 805 | while (ioctl(fd, SIOCDIFADDR, (void *)&areq) != -1) ; |
| 806 | |
| 807 | close(fd); |
| 808 | return 0; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 809 | |
| 810 | #elif defined(__sun__) |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 811 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 812 | if ((ip_fd = open("/dev/udp", O_RDWR, 0)) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 813 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 814 | "Can't open /dev/udp"); |
| 815 | return -1; |
| 816 | } |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 817 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 818 | if (((*tun)->fd = open("/dev/tun", O_RDWR, 0)) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 819 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 820 | "Can't open /dev/tun"); |
| 821 | return -1; |
| 822 | } |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 823 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 824 | /* Assign a new PPA and get its unit number. */ |
| 825 | if ((ppa = ioctl((*tun)->fd, TUNNEWPPA, -1)) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 826 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 827 | "Can't assign new interface"); |
| 828 | return -1; |
| 829 | } |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 830 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 831 | if ((if_fd = open("/dev/tun", O_RDWR, 0)) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 832 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 833 | "Can't open /dev/tun (2)"); |
| 834 | return -1; |
| 835 | } |
| 836 | if (ioctl(if_fd, I_PUSH, "ip") < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 837 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 838 | "Can't push IP module"); |
| 839 | return -1; |
| 840 | } |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 841 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 842 | /* Assign ppa according to the unit number returned by tun device */ |
| 843 | if (ioctl(if_fd, IF_UNITSEL, (char *)&ppa) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 844 | SYS_ERR(DTUN, LOGL_ERROR, errno, "Can't set PPA %d", |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 845 | ppa); |
| 846 | return -1; |
| 847 | } |
| 848 | |
| 849 | /* Link the two streams */ |
| 850 | if ((muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 851 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 852 | "Can't link TUN device to IP"); |
| 853 | return -1; |
| 854 | } |
| 855 | |
| 856 | close(if_fd); |
| 857 | |
| 858 | snprintf((*tun)->devname, sizeof((*tun)->devname), "tun%d", ppa); |
| 859 | (*tun)->devname[sizeof((*tun)->devname)] = 0; |
| 860 | |
| 861 | memset(&ifr, 0, sizeof(ifr)); |
| 862 | strcpy(ifr.ifr_name, (*tun)->devname); |
| 863 | ifr.ifr_ip_muxid = muxid; |
| 864 | |
| 865 | if (ioctl(ip_fd, SIOCSIFMUXID, &ifr) < 0) { |
| 866 | ioctl(ip_fd, I_PUNLINK, muxid); |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 867 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 868 | "Can't set multiplexor id"); |
| 869 | return -1; |
| 870 | } |
| 871 | |
| 872 | /* if (fcntl (fd, F_SETFL, O_NONBLOCK) < 0) |
| 873 | msg (M_ERR, "Set file descriptor to non-blocking failed"); */ |
| 874 | |
| 875 | return 0; |
jjako | 409b855 | 2004-02-04 22:57:41 +0000 | [diff] [blame] | 876 | |
| 877 | #else |
| 878 | #error "Unknown platform!" |
| 879 | #endif |
| 880 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 881 | } |
| 882 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 883 | int tun_free(struct tun_t *tun) |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 884 | { |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 885 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 886 | if (tun->routes) { |
| 887 | tun_delroute(tun, &tun->dstaddr, &tun->addr, &tun->netmask); |
| 888 | } |
jjako | 163b455 | 2004-12-30 15:33:58 +0000 | [diff] [blame] | 889 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 890 | if (close(tun->fd)) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 891 | SYS_ERR(DTUN, LOGL_ERROR, errno, "close() failed"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 892 | } |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 893 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 894 | /* TODO: For solaris we need to unlink streams */ |
jjako | ec89e9f | 2004-01-10 06:38:43 +0000 | [diff] [blame] | 895 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 896 | free(tun); |
| 897 | return 0; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 898 | } |
| 899 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 900 | int tun_set_cb_ind(struct tun_t *this, |
| 901 | int (*cb_ind) (struct tun_t * tun, void *pack, unsigned len)) |
| 902 | { |
| 903 | this->cb_ind = cb_ind; |
| 904 | return 0; |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 905 | } |
| 906 | |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 907 | int tun_decaps(struct tun_t *this) |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 908 | { |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 909 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 910 | #if defined(__linux__) || defined (__FreeBSD__) || defined (__APPLE__) |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 911 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 912 | unsigned char buffer[PACKET_MAX]; |
| 913 | int status; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 914 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 915 | if ((status = read(this->fd, buffer, sizeof(buffer))) <= 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 916 | SYS_ERR(DTUN, LOGL_ERROR, errno, "read() failed"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 917 | return -1; |
| 918 | } |
| 919 | |
| 920 | if (this->cb_ind) |
| 921 | return this->cb_ind(this, buffer, status); |
| 922 | |
| 923 | return 0; |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 924 | |
| 925 | #elif defined (__sun__) |
| 926 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 927 | unsigned char buffer[PACKET_MAX]; |
| 928 | struct strbuf sbuf; |
| 929 | int f = 0; |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 930 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 931 | sbuf.maxlen = PACKET_MAX; |
| 932 | sbuf.buf = buffer; |
| 933 | if (getmsg(this->fd, NULL, &sbuf, &f) < 0) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 934 | SYS_ERR(DTUN, LOGL_ERROR, errno, "getmsg() failed"); |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 935 | return -1; |
| 936 | } |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 937 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 938 | if (this->cb_ind) |
| 939 | return this->cb_ind(this, buffer, sbuf.len); |
| 940 | |
| 941 | return 0; |
| 942 | |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 943 | #endif |
| 944 | |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 945 | } |
| 946 | |
| 947 | int tun_encaps(struct tun_t *tun, void *pack, unsigned len) |
| 948 | { |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 949 | |
jjako | 0fe0df0 | 2004-09-17 11:30:40 +0000 | [diff] [blame] | 950 | #if defined(__linux__) || defined (__FreeBSD__) || defined (__APPLE__) |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 951 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 952 | return write(tun->fd, pack, len); |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 953 | |
| 954 | #elif defined (__sun__) |
| 955 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 956 | struct strbuf sbuf; |
| 957 | sbuf.len = len; |
| 958 | sbuf.buf = pack; |
| 959 | return putmsg(tun->fd, NULL, &sbuf, 0); |
jjako | c6762cf | 2004-04-28 14:52:58 +0000 | [diff] [blame] | 960 | |
| 961 | #endif |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 962 | } |
| 963 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 964 | int tun_runscript(struct tun_t *tun, char *script) |
| 965 | { |
jjako | a7cd249 | 2003-04-11 09:40:12 +0000 | [diff] [blame] | 966 | |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 967 | char buf[TUN_SCRIPTSIZE]; |
| 968 | char snet[TUN_ADDRSIZE]; |
| 969 | char smask[TUN_ADDRSIZE]; |
| 970 | int rc; |
| 971 | |
| 972 | strncpy(snet, inet_ntoa(tun->addr), sizeof(snet)); |
| 973 | snet[sizeof(snet) - 1] = 0; |
| 974 | strncpy(smask, inet_ntoa(tun->netmask), sizeof(smask)); |
| 975 | smask[sizeof(smask) - 1] = 0; |
| 976 | |
| 977 | /* system("ipup /dev/tun0 192.168.0.10 255.255.255.0"); */ |
| 978 | snprintf(buf, sizeof(buf), "%s %s %s %s", |
| 979 | script, tun->devname, snet, smask); |
| 980 | buf[sizeof(buf) - 1] = 0; |
| 981 | rc = system(buf); |
| 982 | if (rc == -1) { |
Holger Hans Peter Freyther | 9c7fd8e | 2014-12-04 16:32:37 +0100 | [diff] [blame] | 983 | SYS_ERR(DTUN, LOGL_ERROR, errno, |
Harald Welte | bed35df | 2011-11-02 13:06:18 +0100 | [diff] [blame] | 984 | "Error executing command %s", buf); |
| 985 | return -1; |
| 986 | } |
| 987 | return 0; |
jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 988 | } |