system-linux.c

   1 /*
   2  * netifd - network interface daemon
   3  * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
   4  * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
   5  * Copyright (C) 2013 Steven Barth <steven@midlink.org>
   6  * Copyright (C) 2014 Gioacchino Mazzurco <gio@eigenlab.org>
   7  * Copyright (C) 2017 Matthias Schiffer <mschiffer@universe-factory.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2
  11  * as published by the Free Software Foundation
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  */
  18 #define _GNU_SOURCE
  19
  20 #include <sys/socket.h>
  21 #include <sys/ioctl.h>
  22 #include <sys/stat.h>
  23 #include <sys/syscall.h>
  24
  25 #include <net/if.h>
  26 #include <net/if_arp.h>
  27
  28 #include <arpa/inet.h>
  29 #include <netinet/ether.h>
  30 #include <netinet/in.h>
  31
  32 #include <linux/rtnetlink.h>
  33 #include <linux/sockios.h>
  34 #include <linux/ip.h>
  35 #include <linux/if_addr.h>
  36 #include <linux/if_link.h>
  37 #include <linux/if_vlan.h>
  38 #include <linux/if_bridge.h>
  39 #include <linux/if_tunnel.h>
  40 #include <linux/ip6_tunnel.h>
  41 #include <linux/ethtool.h>
  42 #include <linux/fib_rules.h>
  43 #include <linux/veth.h>
  44 #include <linux/version.h>
  45
  46 #ifndef RTN_FAILED_POLICY
  47 #define RTN_FAILED_POLICY 12
  48 #endif
  49
  50 #ifndef IFA_F_NOPREFIXROUTE
  51 #define IFA_F_NOPREFIXROUTE 0x200
  52 #endif
  53
  54 #ifndef IFA_FLAGS
  55 #define IFA_FLAGS (IFA_MULTICAST + 1)
  56 #endif
  57
  58 #include <string.h>
  59 #include <fcntl.h>
  60 #include <glob.h>
  61 #include <time.h>
  62 #include <unistd.h>
  63
  64 #include <netlink/msg.h>
  65 #include <netlink/attr.h>
  66 #include <netlink/socket.h>
  67 #include <libubox/uloop.h>
  68
  69 #include "netifd.h"
  70 #include "device.h"
  71 #include "system.h"
  72
  73 struct event_socket {
  74         struct uloop_fd uloop;
  75         struct nl_sock *sock;
  76         int bufsize;
  77 };
  78
  79 static int sock_ioctl = -1;
  80 static struct nl_sock *sock_rtnl = NULL;
  81
  82 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
  83 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
  84 static int system_add_proto_tunnel(const char *name, const uint8_t proto,
  85                                         const unsigned int link, struct blob_attr **tb);
  86 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb);
  87
  88 static char dev_buf[256];
  89
  90 static void
  91 handler_nl_event(struct uloop_fd *u, unsigned int events)
  92 {
  93         struct event_socket *ev = container_of(u, struct event_socket, uloop);
  94         int err;
  95         socklen_t errlen = sizeof(err);
  96
  97         if (!u->error) {
  98                 nl_recvmsgs_default(ev->sock);
  99                 return;
 100         }
 101
 102         if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
 103                 goto abort;
 104
 105         switch(err) {
 106         case ENOBUFS:
 107                 // Increase rx buffer size on netlink socket
 108                 ev->bufsize *= 2;
 109                 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
 110                         goto abort;
 111
 112                 // Request full dump since some info got dropped
 113                 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
 114                 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
 115                 break;
 116
 117         default:
 118                 goto abort;
 119         }
 120         u->error = false;
 121         return;
 122
 123 abort:
 124         uloop_fd_delete(&ev->uloop);
 125         return;
 126 }
 127
 128 static struct nl_sock *
 129 create_socket(int protocol, int groups)
 130 {
 131         struct nl_sock *sock;
 132
 133         sock = nl_socket_alloc();
 134         if (!sock)
 135                 return NULL;
 136
 137         if (groups)
 138                 nl_join_groups(sock, groups);
 139
 140         if (nl_connect(sock, protocol))
 141                 return NULL;
 142
 143         return sock;
 144 }
 145
 146 static bool
 147 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
 148                         uloop_fd_handler cb, int flags)
 149 {
 150         ev->sock = create_socket(protocol, groups);
 151         if (!ev->sock)
 152                 return false;
 153
 154         ev->uloop.fd = nl_socket_get_fd(ev->sock);
 155         ev->uloop.cb = cb;
 156         if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
 157                 return false;
 158
 159         return true;
 160 }
 161
 162 static bool
 163 create_event_socket(struct event_socket *ev, int protocol,
 164                     int (*cb)(struct nl_msg *msg, void *arg))
 165 {
 166         if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
 167                 return false;
 168
 169         // Install the valid custom callback handler
 170         nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
 171
 172         // Disable sequence number checking on event sockets
 173         nl_socket_disable_seq_check(ev->sock);
 174
 175         // Increase rx buffer size to 65K on event sockets
 176         ev->bufsize = 65535;
 177         if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
 178                 return false;
 179
 180         return true;
 181 }
 182
 183 static bool
 184 system_rtn_aton(const char *src, unsigned int *dst)
 185 {
 186         char *e;
 187         unsigned int n;
 188
 189         if (!strcmp(src, "local"))
 190                 n = RTN_LOCAL;
 191         else if (!strcmp(src, "nat"))
 192                 n = RTN_NAT;
 193         else if (!strcmp(src, "broadcast"))
 194                 n = RTN_BROADCAST;
 195         else if (!strcmp(src, "anycast"))
 196                 n = RTN_ANYCAST;
 197         else if (!strcmp(src, "multicast"))
 198                 n = RTN_MULTICAST;
 199         else if (!strcmp(src, "prohibit"))
 200                 n = RTN_PROHIBIT;
 201         else if (!strcmp(src, "unreachable"))
 202                 n = RTN_UNREACHABLE;
 203         else if (!strcmp(src, "blackhole"))
 204                 n = RTN_BLACKHOLE;
 205         else if (!strcmp(src, "xresolve"))
 206                 n = RTN_XRESOLVE;
 207         else if (!strcmp(src, "unicast"))
 208                 n = RTN_UNICAST;
 209         else if (!strcmp(src, "throw"))
 210                 n = RTN_THROW;
 211         else if (!strcmp(src, "failed_policy"))
 212                 n = RTN_FAILED_POLICY;
 213         else {
 214                 n = strtoul(src, &e, 0);
 215                 if (!e || *e || e == src || n > 255)
 216                         return false;
 217         }
 218
 219         *dst = n;
 220         return true;
 221 }
 222
 223 static bool
 224 system_tos_aton(const char *src, unsigned *dst)
 225 {
 226         char *e;
 227
 228         *dst = strtoul(src, &e, 16);
 229         if (e == src || *e || *dst > 255)
 230                 return false;
 231
 232         return true;
 233 }
 234
 235 int system_init(void)
 236 {
 237         static struct event_socket rtnl_event;
 238         static struct event_socket hotplug_event;
 239
 240         sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
 241         system_fd_set_cloexec(sock_ioctl);
 242
 243         // Prepare socket for routing / address control
 244         sock_rtnl = create_socket(NETLINK_ROUTE, 0);
 245         if (!sock_rtnl)
 246                 return -1;
 247
 248         if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
 249                 return -1;
 250
 251         if (!create_raw_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT, 1,
 252                                         handle_hotplug_event, 0))
 253                 return -1;
 254
 255         // Receive network link events form kernel
 256         nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
 257
 258         return 0;
 259 }
 260
 261 static void system_set_sysctl(const char *path, const char *val)
 262 {
 263         int fd;
 264
 265         fd = open(path, O_WRONLY);
 266         if (fd < 0)
 267                 return;
 268
 269         if (write(fd, val, strlen(val))) {}
 270         close(fd);
 271 }
 272
 273 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
 274 {
 275         snprintf(dev_buf, sizeof(dev_buf), path, device);
 276         system_set_sysctl(dev_buf, val);
 277 }
 278
 279 static void system_set_disable_ipv6(struct device *dev, const char *val)
 280 {
 281         system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
 282 }
 283
 284 static void system_set_rpfilter(struct device *dev, const char *val)
 285 {
 286         system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
 287 }
 288
 289 static void system_set_acceptlocal(struct device *dev, const char *val)
 290 {
 291         system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
 292 }
 293
 294 static void system_set_igmpversion(struct device *dev, const char *val)
 295 {
 296         system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val);
 297 }
 298
 299 static void system_set_mldversion(struct device *dev, const char *val)
 300 {
 301         system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val);
 302 }
 303
 304 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
 305 {
 306         system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val);
 307 }
 308
 309 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
 310 {
 311         system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val);
 312 }
 313
 314 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
 315 {
 316         system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time", dev->ifname, val);
 317 }
 318
 319 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
 320 {
 321         system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time", dev->ifname, val);
 322 }
 323
 324 static void system_set_neigh4locktime(struct device *dev, const char *val)
 325 {
 326         system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime", dev->ifname, val);
 327 }
 328
 329 static void system_set_dadtransmits(struct device *dev, const char *val)
 330 {
 331         system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
 332 }
 333
 334 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
 335 {
 336         system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
 337 }
 338
 339 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
 340 {
 341         system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_fast_leave", dev->ifname, val);
 342 }
 343
 344 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
 345 {
 346         system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
 347 }
 348
 349 static void system_bridge_set_isolate_mode(struct device *dev, const char *val)
 350 {
 351         system_set_dev_sysctl("/sys/class/net/%s/brport/isolate_mode", dev->ifname, val);
 352 }
 353
 354 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
 355 {
 356         system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
 357                                        "/sys/class/net/%s/brport/multicast_router",
 358                               dev->ifname, val);
 359 }
 360
 361 static void system_bridge_set_robustness(struct device *dev, const char *val)
 362 {
 363         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
 364                               dev->ifname, val);
 365         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
 366                               dev->ifname, val);
 367 }
 368
 369 static void system_bridge_set_query_interval(struct device *dev, const char *val)
 370 {
 371         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
 372                               dev->ifname, val);
 373 }
 374
 375 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
 376 {
 377         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
 378                               dev->ifname, val);
 379 }
 380
 381 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
 382 {
 383         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
 384                               dev->ifname, val);
 385 }
 386
 387 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
 388 {
 389         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
 390                               dev->ifname, val);
 391 }
 392
 393 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
 394 {
 395         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
 396                               dev->ifname, val);
 397 }
 398
 399 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
 400 {
 401         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
 402                               dev->ifname, val);
 403 }
 404
 405 static void system_bridge_set_learning(struct device *dev, const char *val)
 406 {
 407         system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val);
 408 }
 409
 410 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
 411 {
 412         system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val);
 413 }
 414
 415 static void system_set_sendredirects(struct device *dev, const char *val)
 416 {
 417         system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, val);
 418 }
 419
 420 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
 421 {
 422         int fd = -1, ret = -1;
 423
 424         fd = open(path, O_RDONLY);
 425         if (fd < 0)
 426                 goto out;
 427
 428         ssize_t len = read(fd, buf, buf_sz - 1);
 429         if (len < 0)
 430                 goto out;
 431
 432         ret = buf[len] = 0;
 433
 434 out:
 435         if (fd >= 0)
 436                 close(fd);
 437
 438         return ret;
 439 }
 440
 441 static int
 442 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
 443 {
 444         snprintf(dev_buf, sizeof(dev_buf), path, device);
 445         return system_get_sysctl(dev_buf, buf, buf_sz);
 446 }
 447
 448 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
 449 {
 450         return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
 451                         dev->ifname, buf, buf_sz);
 452 }
 453
 454 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
 455 {
 456         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
 457                         dev->ifname, buf, buf_sz);
 458 }
 459
 460 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
 461 {
 462         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
 463                         dev->ifname, buf, buf_sz);
 464 }
 465
 466 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
 467 {
 468         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
 469                         dev->ifname, buf, buf_sz);
 470 }
 471
 472 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
 473 {
 474         return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
 475                         dev->ifname, buf, buf_sz);
 476 }
 477
 478 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
 479 {
 480         return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
 481                         dev->ifname, buf, buf_sz);
 482 }
 483
 484 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
 485 {
 486         return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
 487                         dev->ifname, buf, buf_sz);
 488 }
 489
 490 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
 491 {
 492         return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time",
 493                         dev->ifname, buf, buf_sz);
 494 }
 495
 496 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
 497 {
 498         return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time",
 499                         dev->ifname, buf, buf_sz);
 500 }
 501
 502 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
 503 {
 504         return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime",
 505                         dev->ifname, buf, buf_sz);
 506 }
 507
 508 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
 509 {
 510         return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
 511                         dev->ifname, buf, buf_sz);
 512 }
 513
 514 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
 515 {
 516         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects",
 517                         dev->ifname, buf, buf_sz);
 518 }
 519
 520 // Evaluate netlink messages
 521 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
 522 {
 523         struct nlmsghdr *nh = nlmsg_hdr(msg);
 524         struct nlattr *nla[__IFLA_MAX];
 525         int link_state = 0;
 526         char buf[10];
 527
 528         if (nh->nlmsg_type != RTM_NEWLINK)
 529                 goto out;
 530
 531         nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
 532         if (!nla[IFLA_IFNAME])
 533                 goto out;
 534
 535         struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
 536         if (!dev)
 537                 goto out;
 538
 539         if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
 540                 link_state = strtoul(buf, NULL, 0);
 541
 542         device_set_link(dev, link_state ? true : false);
 543
 544 out:
 545         return 0;
 546 }
 547
 548 static void
 549 handle_hotplug_msg(char *data, int size)
 550 {
 551         const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
 552         char *cur, *end, *sep;
 553         struct device *dev;
 554         int skip;
 555         bool add, move = false;
 556
 557         if (!strncmp(data, "add@", 4))
 558                 add = true;
 559         else if (!strncmp(data, "remove@", 7))
 560                 add = false;
 561         else if (!strncmp(data, "move@", 5)) {
 562                 add = true;
 563                 move = true;
 564         }
 565         else
 566                 return;
 567
 568         skip = strlen(data) + 1;
 569         end = data + size;
 570
 571         for (cur = data + skip; cur < end; cur += skip) {
 572                 skip = strlen(cur) + 1;
 573
 574                 sep = strchr(cur, '=');
 575                 if (!sep)
 576                         continue;
 577
 578                 *sep = 0;
 579                 if (!strcmp(cur, "INTERFACE"))
 580                         interface = sep + 1;
 581                 else if (!strcmp(cur, "SUBSYSTEM")) {
 582                         subsystem = sep + 1;
 583                         if (strcmp(subsystem, "net") != 0)
 584                                 return;
 585                 } else if (!strcmp(cur, "DEVPATH_OLD")) {
 586                         interface_old = strrchr(sep + 1, '/');
 587                         if (interface_old)
 588                                 interface_old++;
 589                 }
 590         }
 591
 592         if (subsystem && interface) {
 593                 if (move && interface_old)
 594                         goto move;
 595                 else
 596                         goto found;
 597         }
 598
 599         return;
 600
 601 move:
 602         dev = device_find(interface_old);
 603         if (!dev)
 604                 goto found;
 605
 606         if (dev->type != &simple_device_type)
 607                 goto found;
 608
 609         device_set_present(dev, false);
 610
 611 found:
 612         dev = device_find(interface);
 613         if (!dev)
 614                 return;
 615
 616         if (dev->type != &simple_device_type)
 617                 return;
 618
 619         if (add && system_if_force_external(dev->ifname))
 620                 return;
 621
 622         device_set_present(dev, add);
 623 }
 624
 625 static void
 626 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
 627 {
 628         struct event_socket *ev = container_of(u, struct event_socket, uloop);
 629         struct sockaddr_nl nla;
 630         unsigned char *buf = NULL;
 631         int size;
 632
 633         while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
 634                 if (nla.nl_pid == 0)
 635                         handle_hotplug_msg((char *) buf, size);
 636
 637                 free(buf);
 638         }
 639 }
 640
 641 static int system_rtnl_call(struct nl_msg *msg)
 642 {
 643         int ret;
 644
 645         ret = nl_send_auto_complete(sock_rtnl, msg);
 646         nlmsg_free(msg);
 647
 648         if (ret < 0)
 649                 return ret;
 650
 651         return nl_wait_for_ack(sock_rtnl);
 652 }
 653
 654 int system_bridge_delbr(struct device *bridge)
 655 {
 656         return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
 657 }
 658
 659 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
 660 {
 661         struct ifreq ifr;
 662
 663         memset(&ifr, 0, sizeof(ifr));
 664         if (dev)
 665                 ifr.ifr_ifindex = dev->ifindex;
 666         else
 667                 ifr.ifr_data = data;
 668         strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name));
 669         return ioctl(sock_ioctl, cmd, &ifr);
 670 }
 671
 672 static bool system_is_bridge(const char *name, char *buf, int buflen)
 673 {
 674         struct stat st;
 675
 676         snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
 677         if (stat(buf, &st) < 0)
 678                 return false;
 679
 680         return true;
 681 }
 682
 683 static char *system_get_bridge(const char *name, char *buf, int buflen)
 684 {
 685         char *path;
 686         ssize_t len = -1;
 687         glob_t gl;
 688
 689         snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
 690         if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
 691                 return NULL;
 692
 693         if (gl.gl_pathc > 0)
 694                 len = readlink(gl.gl_pathv[0], buf, buflen);
 695
 696         globfree(&gl);
 697
 698         if (len < 0)
 699                 return NULL;
 700
 701         buf[len] = 0;
 702         path = strrchr(buf, '/');
 703         if (!path)
 704                 return NULL;
 705
 706         return path + 1;
 707 }
 708
 709 static void
 710 system_bridge_set_wireless(struct device *bridge, struct device *dev)
 711 {
 712         bool mcast_to_ucast = dev->wireless_ap;
 713         bool hairpin = true;
 714
 715         if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
 716             !bridge->settings.multicast_to_unicast)
 717                 mcast_to_ucast = false;
 718
 719         if (!mcast_to_ucast || dev->wireless_isolate)
 720                 hairpin = false;
 721
 722         system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
 723         system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
 724 }
 725
 726 int system_bridge_addif(struct device *bridge, struct device *dev)
 727 {
 728         char buf[64];
 729         char *oldbr;
 730         int ret = 0;
 731
 732         oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
 733         if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
 734                 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
 735
 736         if (dev->wireless)
 737                 system_bridge_set_wireless(bridge, dev);
 738
 739         if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
 740                 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
 741                 system_bridge_set_multicast_router(dev, buf, false);
 742         }
 743
 744         if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
 745             dev->settings.multicast_fast_leave)
 746                 system_bridge_set_multicast_fast_leave(dev, "1");
 747
 748         if (dev->settings.flags & DEV_OPT_LEARNING &&
 749             !dev->settings.learning)
 750                 system_bridge_set_learning(dev, "0");
 751
 752         if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
 753             !dev->settings.unicast_flood)
 754                 system_bridge_set_unicast_flood(dev, "0");
 755
 756         if (dev->settings.flags & DEV_OPT_ISOLATE &&
 757             dev->settings.isolate)
 758                 system_bridge_set_isolate_mode(dev, "1");
 759
 760         return ret;
 761 }
 762
 763 int system_bridge_delif(struct device *bridge, struct device *dev)
 764 {
 765         return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
 766 }
 767
 768 int system_if_resolve(struct device *dev)
 769 {
 770         struct ifreq ifr;
 771         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
 772         if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
 773                 return ifr.ifr_ifindex;
 774         else
 775                 return 0;
 776 }
 777
 778 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
 779 {
 780         struct ifreq ifr;
 781
 782         memset(&ifr, 0, sizeof(ifr));
 783         strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
 784         ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr);
 785         ifr.ifr_flags |= add;
 786         ifr.ifr_flags &= ~rem;
 787         return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
 788 }
 789
 790 struct clear_data {
 791         struct nl_msg *msg;
 792         struct device *dev;
 793         int type;
 794         int size;
 795         int af;
 796 };
 797
 798
 799 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
 800 {
 801         struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
 802
 803         return ifa->ifa_index == ifindex;
 804 }
 805
 806 static bool check_route(struct nlmsghdr *hdr, int ifindex)
 807 {
 808         struct rtmsg *r = NLMSG_DATA(hdr);
 809         struct nlattr *tb[__RTA_MAX];
 810
 811         if (r->rtm_protocol == RTPROT_KERNEL &&
 812             r->rtm_family == AF_INET6)
 813                 return false;
 814
 815         nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
 816         if (!tb[RTA_OIF])
 817                 return false;
 818
 819         return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
 820 }
 821
 822 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
 823 {
 824         return true;
 825 }
 826
 827 static int cb_clear_event(struct nl_msg *msg, void *arg)
 828 {
 829         struct clear_data *clr = arg;
 830         struct nlmsghdr *hdr = nlmsg_hdr(msg);
 831         bool (*cb)(struct nlmsghdr *, int ifindex);
 832         int type;
 833
 834         switch(clr->type) {
 835         case RTM_GETADDR:
 836                 type = RTM_DELADDR;
 837                 if (hdr->nlmsg_type != RTM_NEWADDR)
 838                         return NL_SKIP;
 839
 840                 cb = check_ifaddr;
 841                 break;
 842         case RTM_GETROUTE:
 843                 type = RTM_DELROUTE;
 844                 if (hdr->nlmsg_type != RTM_NEWROUTE)
 845                         return NL_SKIP;
 846
 847                 cb = check_route;
 848                 break;
 849         case RTM_GETRULE:
 850                 type = RTM_DELRULE;
 851                 if (hdr->nlmsg_type != RTM_NEWRULE)
 852                         return NL_SKIP;
 853
 854                 cb = check_rule;
 855                 break;
 856         default:
 857                 return NL_SKIP;
 858         }
 859
 860         if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
 861                 return NL_SKIP;
 862
 863         if (type == RTM_DELRULE)
 864                 D(SYSTEM, "Remove a rule\n");
 865         else
 866                 D(SYSTEM, "Remove %s from device %s\n",
 867                   type == RTM_DELADDR ? "an address" : "a route",
 868                   clr->dev->ifname);
 869         memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
 870         hdr = nlmsg_hdr(clr->msg);
 871         hdr->nlmsg_type = type;
 872         hdr->nlmsg_flags = NLM_F_REQUEST;
 873
 874         nl_socket_disable_auto_ack(sock_rtnl);
 875         nl_send_auto_complete(sock_rtnl, clr->msg);
 876         nl_socket_enable_auto_ack(sock_rtnl);
 877
 878         return NL_SKIP;
 879 }
 880
 881 static int
 882 cb_finish_event(struct nl_msg *msg, void *arg)
 883 {
 884         int *pending = arg;
 885         *pending = 0;
 886         return NL_STOP;
 887 }
 888
 889 static int
 890 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
 891 {
 892         int *pending = arg;
 893         *pending = err->error;
 894         return NL_STOP;
 895 }
 896
 897 static void
 898 system_if_clear_entries(struct device *dev, int type, int af)
 899 {
 900         struct clear_data clr;
 901         struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
 902         struct rtmsg rtm = {
 903                 .rtm_family = af,
 904                 .rtm_flags = RTM_F_CLONED,
 905         };
 906         int flags = NLM_F_DUMP;
 907         int pending = 1;
 908
 909         clr.af = af;
 910         clr.dev = dev;
 911         clr.type = type;
 912         switch (type) {
 913         case RTM_GETADDR:
 914         case RTM_GETRULE:
 915                 clr.size = sizeof(struct rtgenmsg);
 916                 break;
 917         case RTM_GETROUTE:
 918                 clr.size = sizeof(struct rtmsg);
 919                 break;
 920         default:
 921                 return;
 922         }
 923
 924         if (!cb)
 925                 return;
 926
 927         clr.msg = nlmsg_alloc_simple(type, flags);
 928         if (!clr.msg)
 929                 goto out;
 930
 931         nlmsg_append(clr.msg, &rtm, clr.size, 0);
 932         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
 933         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
 934         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
 935
 936         nl_send_auto_complete(sock_rtnl, clr.msg);
 937         while (pending > 0)
 938                 nl_recvmsgs(sock_rtnl, cb);
 939
 940         nlmsg_free(clr.msg);
 941 out:
 942         nl_cb_put(cb);
 943 }
 944
 945 /*
 946  * Clear bridge (membership) state and bring down device
 947  */
 948 void system_if_clear_state(struct device *dev)
 949 {
 950         static char buf[256];
 951         char *bridge;
 952
 953         device_set_ifindex(dev, system_if_resolve(dev));
 954         if (dev->external || !dev->ifindex)
 955                 return;
 956
 957         system_if_flags(dev->ifname, 0, IFF_UP);
 958
 959         if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
 960                 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
 961                 system_bridge_delbr(dev);
 962                 return;
 963         }
 964
 965         bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
 966         if (bridge) {
 967                 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
 968                 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
 969         }
 970
 971         system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
 972         system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
 973         system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
 974         system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
 975         system_set_disable_ipv6(dev, "0");
 976 }
 977
 978 static inline unsigned long
 979 sec_to_jiffies(int val)
 980 {
 981         return (unsigned long) val * 100;
 982 }
 983
 984 static void system_bridge_conf_multicast_deps(struct device *bridge,
 985                                               struct bridge_config *cfg,
 986                                               char *buf,
 987                                               int buf_len)
 988 {
 989         int val;
 990
 991         if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
 992             cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
 993             cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
 994                 val = cfg->robustness * cfg->query_interval +
 995                         cfg->query_response_interval;
 996
 997                 snprintf(buf, buf_len, "%i", val);
 998                 system_bridge_set_membership_interval(bridge, buf);
 999
1000                 val = cfg->robustness * cfg->query_interval +
1001                         cfg->query_response_interval / 2;
1002
1003                 snprintf(buf, buf_len, "%i", val);
1004                 system_bridge_set_other_querier_timeout(bridge, buf);
1005         }
1006
1007         if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1008                 val = cfg->query_interval / 4;
1009
1010                 snprintf(buf, buf_len, "%i", val);
1011                 system_bridge_set_startup_query_interval(bridge, buf);
1012         }
1013 }
1014
1015 static void system_bridge_conf_multicast(struct device *bridge,
1016                                          struct bridge_config *cfg,
1017                                          char *buf,
1018                                          int buf_len)
1019 {
1020         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
1021                 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
1022
1023         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
1024                 bridge->ifname, cfg->multicast_querier ? "1" : "0");
1025
1026         snprintf(buf, buf_len, "%i", cfg->hash_max);
1027         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
1028                 bridge->ifname, buf);
1029
1030         if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
1031                 snprintf(buf, buf_len, "%u", bridge->settings.multicast_router);
1032                 system_bridge_set_multicast_router(bridge, buf, true);
1033         }
1034
1035         if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1036                 snprintf(buf, buf_len, "%i", cfg->robustness);
1037                 system_bridge_set_robustness(bridge, buf);
1038         }
1039
1040         if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1041                 snprintf(buf, buf_len, "%i", cfg->query_interval);
1042                 system_bridge_set_query_interval(bridge, buf);
1043         }
1044
1045         if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1046                 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1047                 system_bridge_set_query_response_interval(bridge, buf);
1048         }
1049
1050         if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1051                 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1052                 system_bridge_set_last_member_interval(bridge, buf);
1053         }
1054
1055         system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1056 }
1057
1058 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1059 {
1060         char buf[64];
1061         unsigned long args[4] = {};
1062
1063         if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1064                 return -1;
1065
1066         args[0] = BRCTL_SET_BRIDGE_STP_STATE;
1067         args[1] = !!cfg->stp;
1068         system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1069
1070         args[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY;
1071         args[1] = sec_to_jiffies(cfg->forward_delay);
1072         system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1073
1074         system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1075
1076         args[0] = BRCTL_SET_BRIDGE_PRIORITY;
1077         args[1] = cfg->priority;
1078         system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1079
1080         if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1081                 args[0] = BRCTL_SET_AGEING_TIME;
1082                 args[1] = sec_to_jiffies(cfg->ageing_time);
1083                 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1084         }
1085
1086         if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
1087                 args[0] = BRCTL_SET_BRIDGE_HELLO_TIME;
1088                 args[1] = sec_to_jiffies(cfg->hello_time);
1089                 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1090         }
1091
1092         if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1093                 args[0] = BRCTL_SET_BRIDGE_MAX_AGE;
1094                 args[1] = sec_to_jiffies(cfg->max_age);
1095                 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1096         }
1097
1098         return 0;
1099 }
1100
1101 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1102 {
1103         struct nl_msg *msg;
1104         struct nlattr *linkinfo, *data;
1105         struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1106         int i, rv;
1107         static const struct {
1108                 const char *name;
1109                 enum macvlan_mode val;
1110         } modes[] = {
1111                 { "private", MACVLAN_MODE_PRIVATE },
1112                 { "vepa", MACVLAN_MODE_VEPA },
1113                 { "bridge", MACVLAN_MODE_BRIDGE },
1114                 { "passthru", MACVLAN_MODE_PASSTHRU },
1115         };
1116
1117         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1118
1119         if (!msg)
1120                 return -1;
1121
1122         nlmsg_append(msg, &iim, sizeof(iim), 0);
1123
1124         if (cfg->flags & MACVLAN_OPT_MACADDR)
1125                 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1126         nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1127         nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1128
1129         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1130                 goto nla_put_failure;
1131
1132         nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1133
1134         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1135                 goto nla_put_failure;
1136
1137         if (cfg->mode) {
1138                 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1139                         if (strcmp(cfg->mode, modes[i].name) != 0)
1140                                 continue;
1141
1142                         nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1143                         break;
1144                 }
1145         }
1146
1147         nla_nest_end(msg, data);
1148         nla_nest_end(msg, linkinfo);
1149
1150         rv = system_rtnl_call(msg);
1151         if (rv)
1152                 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1153
1154         return rv;
1155
1156 nla_put_failure:
1157         nlmsg_free(msg);
1158         return -ENOMEM;
1159 }
1160
1161 static int system_link_del(const char *ifname)
1162 {
1163         struct nl_msg *msg;
1164         struct ifinfomsg iim = {
1165                 .ifi_family = AF_UNSPEC,
1166                 .ifi_index = 0,
1167         };
1168
1169         msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1170
1171         if (!msg)
1172                 return -1;
1173
1174         nlmsg_append(msg, &iim, sizeof(iim), 0);
1175         nla_put_string(msg, IFLA_IFNAME, ifname);
1176         return system_rtnl_call(msg);
1177 }
1178
1179 int system_macvlan_del(struct device *macvlan)
1180 {
1181         return system_link_del(macvlan->ifname);
1182 }
1183
1184 int system_veth_add(struct device *veth, struct veth_config *cfg)
1185 {
1186         struct nl_msg *msg;
1187         struct ifinfomsg empty_iim = {};
1188         struct nlattr *linkinfo, *data, *veth_info;
1189         int rv;
1190
1191         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1192
1193         if (!msg)
1194                 return -1;
1195
1196         nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1197
1198         if (cfg->flags & VETH_OPT_MACADDR)
1199                 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1200         nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1201
1202         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1203                 goto nla_put_failure;
1204
1205         nla_put_string(msg, IFLA_INFO_KIND, "veth");
1206
1207         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1208                 goto nla_put_failure;
1209
1210         if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1211                 goto nla_put_failure;
1212
1213         nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1214
1215         if (cfg->flags & VETH_OPT_PEER_NAME)
1216                 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1217         if (cfg->flags & VETH_OPT_PEER_MACADDR)
1218                 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1219
1220         nla_nest_end(msg, veth_info);
1221         nla_nest_end(msg, data);
1222         nla_nest_end(msg, linkinfo);
1223
1224         rv = system_rtnl_call(msg);
1225         if (rv) {
1226                 if (cfg->flags & VETH_OPT_PEER_NAME)
1227                         D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1228                 else
1229                         D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1230         }
1231
1232         return rv;
1233
1234 nla_put_failure:
1235         nlmsg_free(msg);
1236         return -ENOMEM;
1237 }
1238
1239 int system_veth_del(struct device *veth)
1240 {
1241         return system_link_del(veth->ifname);
1242 }
1243
1244 static int system_vlan(struct device *dev, int id)
1245 {
1246         struct vlan_ioctl_args ifr = {
1247                 .cmd = SET_VLAN_NAME_TYPE_CMD,
1248                 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1249         };
1250
1251         ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1252
1253         if (id < 0) {
1254                 ifr.cmd = DEL_VLAN_CMD;
1255                 ifr.u.VID = 0;
1256         } else {
1257                 ifr.cmd = ADD_VLAN_CMD;
1258                 ifr.u.VID = id;
1259         }
1260         strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1261         return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1262 }
1263
1264 int system_vlan_add(struct device *dev, int id)
1265 {
1266         return system_vlan(dev, id);
1267 }
1268
1269 int system_vlan_del(struct device *dev)
1270 {
1271         return system_vlan(dev, -1);
1272 }
1273
1274 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1275 {
1276         struct nl_msg *msg;
1277         struct nlattr *linkinfo, *data;
1278         struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1279         int rv;
1280
1281         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1282
1283         if (!msg)
1284                 return -1;
1285
1286         nlmsg_append(msg, &iim, sizeof(iim), 0);
1287         nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1288         nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1289
1290         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1291                 goto nla_put_failure;
1292
1293         nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1294
1295         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1296                 goto nla_put_failure;
1297
1298         nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1299
1300 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1301         nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1302 #else
1303         if(cfg->proto == VLAN_PROTO_8021AD)
1304                 netifd_log_message(L_WARNING, "%s Your kernel is older than linux 3.10.0, 802.1ad is not supported defaulting to 802.1q", vlandev->type->name);
1305 #endif
1306
1307         nla_nest_end(msg, data);
1308         nla_nest_end(msg, linkinfo);
1309
1310         rv = system_rtnl_call(msg);
1311         if (rv)
1312                 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1313
1314         return rv;
1315
1316 nla_put_failure:
1317         nlmsg_free(msg);
1318         return -ENOMEM;
1319 }
1320
1321 int system_vlandev_del(struct device *vlandev)
1322 {
1323         return system_link_del(vlandev->ifname);
1324 }
1325
1326 void
1327 system_if_get_settings(struct device *dev, struct device_settings *s)
1328 {
1329         struct ifreq ifr;
1330         char buf[10];
1331
1332         memset(&ifr, 0, sizeof(ifr));
1333         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1334
1335         if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1336                 s->mtu = ifr.ifr_mtu;
1337                 s->flags |= DEV_OPT_MTU;
1338         }
1339
1340         s->mtu6 = system_update_ipv6_mtu(dev, 0);
1341         if (s->mtu6 > 0)
1342                 s->flags |= DEV_OPT_MTU6;
1343
1344         if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1345                 s->txqueuelen = ifr.ifr_qlen;
1346                 s->flags |= DEV_OPT_TXQUEUELEN;
1347         }
1348
1349         if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1350                 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1351                 s->flags |= DEV_OPT_MACADDR;
1352         }
1353
1354         if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1355                 s->ipv6 = !strtoul(buf, NULL, 0);
1356                 s->flags |= DEV_OPT_IPV6;
1357         }
1358
1359         if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1360                 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1361                 s->flags |= DEV_OPT_PROMISC;
1362
1363                 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1364                 s->flags |= DEV_OPT_MULTICAST;
1365         }
1366
1367         if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1368                 s->rpfilter = strtoul(buf, NULL, 0);
1369                 s->flags |= DEV_OPT_RPFILTER;
1370         }
1371
1372         if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1373                 s->acceptlocal = strtoul(buf, NULL, 0);
1374                 s->flags |= DEV_OPT_ACCEPTLOCAL;
1375         }
1376
1377         if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1378                 s->igmpversion = strtoul(buf, NULL, 0);
1379                 s->flags |= DEV_OPT_IGMPVERSION;
1380         }
1381
1382         if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1383                 s->mldversion = strtoul(buf, NULL, 0);
1384                 s->flags |= DEV_OPT_MLDVERSION;
1385         }
1386
1387         if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1388                 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1389                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1390         }
1391
1392         if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1393                 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1394                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1395         }
1396
1397         if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1398                 s->neigh4locktime = strtol(buf, NULL, 0);
1399                 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1400         }
1401
1402         if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1403                 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1404                 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1405         }
1406
1407         if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1408                 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1409                 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1410         }
1411
1412         if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1413                 s->dadtransmits = strtoul(buf, NULL, 0);
1414                 s->flags |= DEV_OPT_DADTRANSMITS;
1415         }
1416
1417         if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1418                 s->sendredirects = strtoul(buf, NULL, 0);
1419                 s->flags |= DEV_OPT_SENDREDIRECTS;
1420         }
1421 }
1422
1423 void
1424 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1425 {
1426         struct ifreq ifr;
1427         char buf[12];
1428
1429         memset(&ifr, 0, sizeof(ifr));
1430         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1431         if (s->flags & DEV_OPT_MTU & apply_mask) {
1432                 ifr.ifr_mtu = s->mtu;
1433                 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1434                         s->flags &= ~DEV_OPT_MTU;
1435         }
1436         if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1437                 system_update_ipv6_mtu(dev, s->mtu6);
1438         }
1439         if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1440                 ifr.ifr_qlen = s->txqueuelen;
1441                 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1442                         s->flags &= ~DEV_OPT_TXQUEUELEN;
1443         }
1444         if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1445                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1446                 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1447                 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1448                         s->flags &= ~DEV_OPT_MACADDR;
1449         }
1450         if (s->flags & DEV_OPT_IPV6 & apply_mask)
1451                 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1452         if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1453                 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1454                                     !s->promisc ? IFF_PROMISC : 0) < 0)
1455                         s->flags &= ~DEV_OPT_PROMISC;
1456         }
1457         if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1458                 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1459                 system_set_rpfilter(dev, buf);
1460         }
1461         if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1462                 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1463         if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1464                 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1465                 system_set_igmpversion(dev, buf);
1466         }
1467         if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1468                 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1469                 system_set_mldversion(dev, buf);
1470         }
1471         if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1472                 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1473                 system_set_neigh4reachabletime(dev, buf);
1474                 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1475                 system_set_neigh6reachabletime(dev, buf);
1476         }
1477         if (s->flags & DEV_OPT_NEIGHLOCKTIME & apply_mask) {
1478                 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1479                 system_set_neigh4locktime(dev, buf);
1480         }
1481         if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1482                 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1483                 system_set_neigh4gcstaletime(dev, buf);
1484                 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1485                 system_set_neigh6gcstaletime(dev, buf);
1486         }
1487         if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1488                 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1489                 system_set_dadtransmits(dev, buf);
1490         }
1491         if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1492                 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1493                                     !s->multicast ? IFF_MULTICAST : 0) < 0)
1494                         s->flags &= ~DEV_OPT_MULTICAST;
1495         }
1496         if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1497                 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1498 }
1499
1500 int system_if_up(struct device *dev)
1501 {
1502         system_if_get_settings(dev, &dev->orig_settings);
1503         /* Only keep orig settings based on what needs to be set */
1504         dev->orig_settings.valid_flags = dev->orig_settings.flags;
1505         dev->orig_settings.flags &= dev->settings.flags;
1506         system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1507         return system_if_flags(dev->ifname, IFF_UP, 0);
1508 }
1509
1510 int system_if_down(struct device *dev)
1511 {
1512         int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1513         system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1514         return ret;
1515 }
1516
1517 struct if_check_data {
1518         struct device *dev;
1519         int pending;
1520         int ret;
1521 };
1522
1523 #ifndef IFF_LOWER_UP
1524 #define IFF_LOWER_UP    0x10000
1525 #endif
1526
1527 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1528 {
1529         struct nlmsghdr *nh = nlmsg_hdr(msg);
1530         struct ifinfomsg *ifi = NLMSG_DATA(nh);
1531         struct if_check_data *chk = (struct if_check_data *)arg;
1532
1533         if (nh->nlmsg_type != RTM_NEWLINK)
1534                 return NL_SKIP;
1535
1536         device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1537         device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1538
1539         return NL_OK;
1540 }
1541
1542 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1543 {
1544         struct if_check_data *chk = (struct if_check_data *)arg;
1545         chk->pending = 0;
1546         return NL_STOP;
1547 }
1548
1549 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1550 {
1551         struct if_check_data *chk = (struct if_check_data *)arg;
1552
1553         device_set_present(chk->dev, false);
1554         device_set_link(chk->dev, false);
1555         chk->pending = err->error;
1556
1557         return NL_STOP;
1558 }
1559
1560 int system_if_check(struct device *dev)
1561 {
1562         struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1563         struct nl_msg *msg;
1564         struct ifinfomsg ifi = {
1565                 .ifi_family = AF_UNSPEC,
1566                 .ifi_index = 0,
1567         };
1568         struct if_check_data chk = {
1569                 .dev = dev,
1570                 .pending = 1,
1571         };
1572         int ret = 1;
1573
1574         msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1575         if (!msg)
1576                 goto out;
1577
1578         if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1579             nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1580                 goto free;
1581
1582         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1583         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1584         nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1585
1586         nl_send_auto_complete(sock_rtnl, msg);
1587         while (chk.pending > 0)
1588                 nl_recvmsgs(sock_rtnl, cb);
1589
1590         ret = chk.pending;
1591
1592 free:
1593         nlmsg_free(msg);
1594 out:
1595         nl_cb_put(cb);
1596         return ret;
1597 }
1598
1599 struct device *
1600 system_if_get_parent(struct device *dev)
1601 {
1602         char buf[64], *devname;
1603         int ifindex, iflink, len;
1604         FILE *f;
1605
1606         snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1607         f = fopen(buf, "r");
1608         if (!f)
1609                 return NULL;
1610
1611         len = fread(buf, 1, sizeof(buf) - 1, f);
1612         fclose(f);
1613
1614         if (len <= 0)
1615                 return NULL;
1616
1617         buf[len] = 0;
1618         iflink = strtoul(buf, NULL, 0);
1619         ifindex = system_if_resolve(dev);
1620         if (!iflink || iflink == ifindex)
1621                 return NULL;
1622
1623         devname = if_indextoname(iflink, buf);
1624         if (!devname)
1625                 return NULL;
1626
1627         return device_get(devname, true);
1628 }
1629
1630 static bool
1631 read_string_file(int dir_fd, const char *file, char *buf, int len)
1632 {
1633         bool ret = false;
1634         char *c;
1635         int fd;
1636
1637         fd = openat(dir_fd, file, O_RDONLY);
1638         if (fd < 0)
1639                 return false;
1640
1641 retry:
1642         len = read(fd, buf, len - 1);
1643         if (len < 0) {
1644                 if (errno == EINTR)
1645                         goto retry;
1646         } else if (len > 0) {
1647                         buf[len] = 0;
1648
1649                         c = strchr(buf, '\n');
1650                         if (c)
1651                                 *c = 0;
1652
1653                         ret = true;
1654         }
1655
1656         close(fd);
1657
1658         return ret;
1659 }
1660
1661 static bool
1662 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1663 {
1664         char buf[64];
1665         bool ret = false;
1666
1667         ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1668         if (ret)
1669                 *val = strtoull(buf, NULL, 0);
1670
1671         return ret;
1672 }
1673
1674 /* Assume advertised flags == supported flags */
1675 static const struct {
1676         uint32_t mask;
1677         const char *name;
1678 } ethtool_link_modes[] = {
1679         { ADVERTISED_10baseT_Half, "10H" },
1680         { ADVERTISED_10baseT_Full, "10F" },
1681         { ADVERTISED_100baseT_Half, "100H" },
1682         { ADVERTISED_100baseT_Full, "100F" },
1683         { ADVERTISED_1000baseT_Half, "1000H" },
1684         { ADVERTISED_1000baseT_Full, "1000F" },
1685 };
1686
1687 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1688 {
1689         int i;
1690         for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1691                 if (mask & ethtool_link_modes[i].mask)
1692                         blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1693         }
1694 }
1695
1696 bool
1697 system_if_force_external(const char *ifname)
1698 {
1699         char buf[64];
1700         struct stat s;
1701
1702         snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1703         return stat(buf, &s) == 0;
1704 }
1705
1706 int
1707 system_if_dump_info(struct device *dev, struct blob_buf *b)
1708 {
1709         struct ethtool_cmd ecmd;
1710         struct ifreq ifr;
1711         char *s;
1712         void *c;
1713
1714         memset(&ecmd, 0, sizeof(ecmd));
1715         memset(&ifr, 0, sizeof(ifr));
1716         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1717         ifr.ifr_data = (caddr_t) &ecmd;
1718         ecmd.cmd = ETHTOOL_GSET;
1719
1720         if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1721                 c = blobmsg_open_array(b, "link-advertising");
1722                 system_add_link_modes(b, ecmd.advertising);
1723                 blobmsg_close_array(b, c);
1724
1725                 c = blobmsg_open_array(b, "link-supported");
1726                 system_add_link_modes(b, ecmd.supported);
1727                 blobmsg_close_array(b, c);
1728
1729                 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1730                 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1731                         ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1732                 blobmsg_add_string_buffer(b);
1733         }
1734
1735         return 0;
1736 }
1737
1738 int
1739 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1740 {
1741         const char *const counters[] = {
1742                 "collisions",     "rx_frame_errors",   "tx_compressed",
1743                 "multicast",      "rx_length_errors",  "tx_dropped",
1744                 "rx_bytes",       "rx_missed_errors",  "tx_errors",
1745                 "rx_compressed",  "rx_over_errors",    "tx_fifo_errors",
1746                 "rx_crc_errors",  "rx_packets",        "tx_heartbeat_errors",
1747                 "rx_dropped",     "tx_aborted_errors", "tx_packets",
1748                 "rx_errors",      "tx_bytes",          "tx_window_errors",
1749                 "rx_fifo_errors", "tx_carrier_errors",
1750         };
1751         char buf[64];
1752         int stats_dir;
1753         int i;
1754         uint64_t val = 0;
1755
1756         snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1757         stats_dir = open(buf, O_DIRECTORY);
1758         if (stats_dir < 0)
1759                 return -1;
1760
1761         for (i = 0; i < ARRAY_SIZE(counters); i++)
1762                 if (read_uint64_file(stats_dir, counters[i], &val))
1763                         blobmsg_add_u64(b, counters[i], val);
1764
1765         close(stats_dir);
1766         return 0;
1767 }
1768
1769 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1770 {
1771         bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1772         int alen = v4 ? 4 : 16;
1773         unsigned int flags = 0;
1774         struct ifaddrmsg ifa = {
1775                 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1776                 .ifa_prefixlen = addr->mask,
1777                 .ifa_index = dev->ifindex,
1778         };
1779
1780         struct nl_msg *msg;
1781         if (cmd == RTM_NEWADDR)
1782                 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1783
1784         msg = nlmsg_alloc_simple(cmd, flags);
1785         if (!msg)
1786                 return -1;
1787
1788         nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1789         nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1790         if (v4) {
1791                 if (addr->broadcast)
1792                         nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1793                 if (addr->point_to_point)
1794                         nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1795         } else {
1796                 time_t now = system_get_rtime();
1797                 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1798
1799                 if (addr->preferred_until) {
1800                         int64_t preferred = addr->preferred_until - now;
1801                         if (preferred < 0)
1802                                 preferred = 0;
1803                         else if (preferred > UINT32_MAX)
1804                                 preferred = UINT32_MAX;
1805
1806                         cinfo.ifa_prefered = preferred;
1807                 }
1808
1809                 if (addr->valid_until) {
1810                         int64_t valid = addr->valid_until - now;
1811                         if (valid <= 0) {
1812                                 nlmsg_free(msg);
1813                                 return -1;
1814                         }
1815                         else if (valid > UINT32_MAX)
1816                                 valid = UINT32_MAX;
1817
1818                         cinfo.ifa_valid = valid;
1819                 }
1820
1821                 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1822
1823                 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1824                         nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1825         }
1826
1827         return system_rtnl_call(msg);
1828 }
1829
1830 int system_add_address(struct device *dev, struct device_addr *addr)
1831 {
1832         return system_addr(dev, addr, RTM_NEWADDR);
1833 }
1834
1835 int system_del_address(struct device *dev, struct device_addr *addr)
1836 {
1837         return system_addr(dev, addr, RTM_DELADDR);
1838 }
1839
1840 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1841 {
1842         int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1843         bool have_gw;
1844         unsigned int flags = 0;
1845
1846         if (alen == 4)
1847                 have_gw = !!route->nexthop.in.s_addr;
1848         else
1849                 have_gw = route->nexthop.in6.s6_addr32[0] ||
1850                         route->nexthop.in6.s6_addr32[1] ||
1851                         route->nexthop.in6.s6_addr32[2] ||
1852                         route->nexthop.in6.s6_addr32[3];
1853
1854         unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
1855                         ? route->table : RT_TABLE_MAIN;
1856
1857         struct rtmsg rtm = {
1858                 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1859                 .rtm_dst_len = route->mask,
1860                 .rtm_src_len = route->sourcemask,
1861                 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
1862                 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
1863                 .rtm_scope = RT_SCOPE_NOWHERE,
1864                 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
1865                 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
1866         };
1867         struct nl_msg *msg;
1868
1869         if (cmd == RTM_NEWROUTE) {
1870                 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1871
1872                 if (!dev) { // Add null-route
1873                         rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1874                         rtm.rtm_type = RTN_UNREACHABLE;
1875                 }
1876                 else
1877                         rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
1878         }
1879
1880         if (route->flags & DEVROUTE_TYPE) {
1881                 rtm.rtm_type = route->type;
1882                 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
1883                         if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
1884                             rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
1885                                 rtm.rtm_table = RT_TABLE_LOCAL;
1886                 }
1887
1888                 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
1889                         rtm.rtm_scope = RT_SCOPE_HOST;
1890                 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
1891                                 rtm.rtm_type == RTN_ANYCAST) {
1892                         rtm.rtm_scope = RT_SCOPE_LINK;
1893                 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
1894                                 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
1895                                 rtm.rtm_type == RTN_THROW) {
1896                         rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1897                         dev = NULL;
1898                 }
1899         }
1900
1901         msg = nlmsg_alloc_simple(cmd, flags);
1902         if (!msg)
1903                 return -1;
1904
1905         nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1906
1907         if (route->mask)
1908                 nla_put(msg, RTA_DST, alen, &route->addr);
1909
1910         if (route->sourcemask) {
1911                 if (rtm.rtm_family == AF_INET)
1912                         nla_put(msg, RTA_PREFSRC, alen, &route->source);
1913                 else
1914                         nla_put(msg, RTA_SRC, alen, &route->source);
1915         }
1916
1917         if (route->metric > 0)
1918                 nla_put_u32(msg, RTA_PRIORITY, route->metric);
1919
1920         if (have_gw)
1921                 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
1922
1923         if (dev)
1924                 nla_put_u32(msg, RTA_OIF, dev->ifindex);
1925
1926         if (table >= 256)
1927                 nla_put_u32(msg, RTA_TABLE, table);
1928
1929         if (route->flags & DEVROUTE_MTU) {
1930                 struct nlattr *metrics;
1931
1932                 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
1933                         goto nla_put_failure;
1934
1935                 nla_put_u32(msg, RTAX_MTU, route->mtu);
1936
1937                 nla_nest_end(msg, metrics);
1938         }
1939
1940         return system_rtnl_call(msg);
1941
1942 nla_put_failure:
1943         nlmsg_free(msg);
1944         return -ENOMEM;
1945 }
1946
1947 int system_add_route(struct device *dev, struct device_route *route)
1948 {
1949         return system_rt(dev, route, RTM_NEWROUTE);
1950 }
1951
1952 int system_del_route(struct device *dev, struct device_route *route)
1953 {
1954         return system_rt(dev, route, RTM_DELROUTE);
1955 }
1956
1957 int system_flush_routes(void)
1958 {
1959         const char *names[] = {
1960                 "/proc/sys/net/ipv4/route/flush",
1961                 "/proc/sys/net/ipv6/route/flush"
1962         };
1963         int fd, i;
1964
1965         for (i = 0; i < ARRAY_SIZE(names); i++) {
1966                 fd = open(names[i], O_WRONLY);
1967                 if (fd < 0)
1968                         continue;
1969
1970                 if (write(fd, "-1", 2)) {}
1971                 close(fd);
1972         }
1973         return 0;
1974 }
1975
1976 bool system_resolve_rt_type(const char *type, unsigned int *id)
1977 {
1978         return system_rtn_aton(type, id);
1979 }
1980
1981 bool system_resolve_rt_proto(const char *type, unsigned int *id)
1982 {
1983         FILE *f;
1984         char *e, buf[128];
1985         unsigned int n, proto = 256;
1986         n = strtoul(type, &e, 0);
1987         if (!*e && e != type)
1988                 proto = n;
1989         else if (!strcmp(type, "unspec"))
1990                 proto = RTPROT_UNSPEC;
1991         else if (!strcmp(type, "kernel"))
1992                 proto = RTPROT_KERNEL;
1993         else if (!strcmp(type, "boot"))
1994                 proto = RTPROT_BOOT;
1995         else if (!strcmp(type, "static"))
1996                 proto = RTPROT_STATIC;
1997         else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
1998                 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
1999                         if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2000                                 continue;
2001
2002                         n = strtoul(e, NULL, 10);
2003                         e = strtok(NULL, " \t\n");
2004
2005                         if (e && !strcmp(e, type)) {
2006                                 proto = n;
2007                                 break;
2008                         }
2009                 }
2010                 fclose(f);
2011         }
2012
2013         if (proto > 255)
2014                 return false;
2015
2016         *id = proto;
2017         return true;
2018 }
2019
2020 bool system_resolve_rt_table(const char *name, unsigned int *id)
2021 {
2022         FILE *f;
2023         char *e, buf[128];
2024         unsigned int n, table = RT_TABLE_UNSPEC;
2025
2026         /* first try to parse table as number */
2027         if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2028                 table = n;
2029
2030         /* handle well known aliases */
2031         else if (!strcmp(name, "default"))
2032                 table = RT_TABLE_DEFAULT;
2033         else if (!strcmp(name, "main"))
2034                 table = RT_TABLE_MAIN;
2035         else if (!strcmp(name, "local"))
2036                 table = RT_TABLE_LOCAL;
2037
2038         /* try to look up name in /etc/iproute2/rt_tables */
2039         else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2040         {
2041                 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2042                 {
2043                         if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2044                                 continue;
2045
2046                         n = strtoul(e, NULL, 10);
2047                         e = strtok(NULL, " \t\n");
2048
2049                         if (e && !strcmp(e, name))
2050                         {
2051                                 table = n;
2052                                 break;
2053                         }
2054                 }
2055
2056                 fclose(f);
2057         }
2058
2059         if (table == RT_TABLE_UNSPEC)
2060                 return false;
2061
2062         *id = table;
2063         return true;
2064 }
2065
2066 bool system_is_default_rt_table(unsigned int id)
2067 {
2068         return (id == RT_TABLE_MAIN);
2069 }
2070
2071 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2072 {
2073         char *e;
2074         unsigned int n;
2075
2076         if (!strcmp(filter, "strict"))
2077                 n = 1;
2078         else if (!strcmp(filter, "loose"))
2079                 n = 2;
2080         else {
2081                 n = strtoul(filter, &e, 0);
2082                 if (*e || e == filter || n > 2)
2083                         return false;
2084         }
2085
2086         *id = n;
2087         return true;
2088 }
2089
2090 static int system_iprule(struct iprule *rule, int cmd)
2091 {
2092         int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2093
2094         struct nl_msg *msg;
2095         struct rtmsg rtm = {
2096                 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2097                 .rtm_protocol = RTPROT_STATIC,
2098                 .rtm_scope = RT_SCOPE_UNIVERSE,
2099                 .rtm_table = RT_TABLE_UNSPEC,
2100                 .rtm_type = RTN_UNSPEC,
2101                 .rtm_flags = 0,
2102         };
2103
2104         if (cmd == RTM_NEWRULE)
2105                 rtm.rtm_type = RTN_UNICAST;
2106
2107         if (rule->invert)
2108                 rtm.rtm_flags |= FIB_RULE_INVERT;
2109
2110         if (rule->flags & IPRULE_SRC)
2111                 rtm.rtm_src_len = rule->src_mask;
2112
2113         if (rule->flags & IPRULE_DEST)
2114                 rtm.rtm_dst_len = rule->dest_mask;
2115
2116         if (rule->flags & IPRULE_TOS)
2117                 rtm.rtm_tos = rule->tos;
2118
2119         if (rule->flags & IPRULE_LOOKUP) {
2120                 if (rule->lookup < 256)
2121                         rtm.rtm_table = rule->lookup;
2122         }
2123
2124         if (rule->flags & IPRULE_ACTION)
2125                 rtm.rtm_type = rule->action;
2126         else if (rule->flags & IPRULE_GOTO)
2127                 rtm.rtm_type = FR_ACT_GOTO;
2128         else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2129                 rtm.rtm_type = FR_ACT_NOP;
2130
2131         msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2132
2133         if (!msg)
2134                 return -1;
2135
2136         nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2137
2138         if (rule->flags & IPRULE_IN)
2139                 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2140
2141         if (rule->flags & IPRULE_OUT)
2142                 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2143
2144         if (rule->flags & IPRULE_SRC)
2145                 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2146
2147         if (rule->flags & IPRULE_DEST)
2148                 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2149
2150         if (rule->flags & IPRULE_PRIORITY)
2151                 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2152         else if (cmd == RTM_NEWRULE)
2153                 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2154
2155         if (rule->flags & IPRULE_FWMARK)
2156                 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2157
2158         if (rule->flags & IPRULE_FWMASK)
2159                 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2160
2161         if (rule->flags & IPRULE_LOOKUP) {
2162                 if (rule->lookup >= 256)
2163                         nla_put_u32(msg, FRA_TABLE, rule->lookup);
2164         }
2165
2166         if (rule->flags & IPRULE_SUP_PREFIXLEN)
2167                 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2168
2169         if (rule->flags & IPRULE_GOTO)
2170                 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2171
2172         return system_rtnl_call(msg);
2173 }
2174
2175 int system_add_iprule(struct iprule *rule)
2176 {
2177         return system_iprule(rule, RTM_NEWRULE);
2178 }
2179
2180 int system_del_iprule(struct iprule *rule)
2181 {
2182         return system_iprule(rule, RTM_DELRULE);
2183 }
2184
2185 int system_flush_iprules(void)
2186 {
2187         int rv = 0;
2188         struct iprule rule;
2189
2190         system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2191         system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2192
2193         memset(&rule, 0, sizeof(rule));
2194
2195
2196         rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2197
2198         rule.priority = 0;
2199         rule.lookup = RT_TABLE_LOCAL;
2200         rv |= system_iprule(&rule, RTM_NEWRULE);
2201
2202         rule.priority = 32766;
2203         rule.lookup = RT_TABLE_MAIN;
2204         rv |= system_iprule(&rule, RTM_NEWRULE);
2205
2206         rule.priority = 32767;
2207         rule.lookup = RT_TABLE_DEFAULT;
2208         rv |= system_iprule(&rule, RTM_NEWRULE);
2209
2210
2211         rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2212
2213         rule.priority = 0;
2214         rule.lookup = RT_TABLE_LOCAL;
2215         rv |= system_iprule(&rule, RTM_NEWRULE);
2216
2217         rule.priority = 32766;
2218         rule.lookup = RT_TABLE_MAIN;
2219         rv |= system_iprule(&rule, RTM_NEWRULE);
2220
2221         return rv;
2222 }
2223
2224 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2225 {
2226         return system_rtn_aton(action, id);
2227 }
2228
2229 time_t system_get_rtime(void)
2230 {
2231         struct timespec ts;
2232         struct timeval tv;
2233
2234         if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2235                 return ts.tv_sec;
2236
2237         if (gettimeofday(&tv, NULL) == 0)
2238                 return tv.tv_sec;
2239
2240         return 0;
2241 }
2242
2243 #ifndef IP_DF
2244 #define IP_DF       0x4000
2245 #endif
2246
2247 static int tunnel_ioctl(const char *name, int cmd, void *p)
2248 {
2249         struct ifreq ifr;
2250
2251         memset(&ifr, 0, sizeof(ifr));
2252         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
2253         ifr.ifr_ifru.ifru_data = p;
2254         return ioctl(sock_ioctl, cmd, &ifr);
2255 }
2256
2257 #ifdef IFLA_IPTUN_MAX
2258 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2259                                  struct blob_attr **tb)
2260 {
2261         struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2262                                 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2263         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2264         struct blob_attr *cur;
2265         int ret = 0, ttl = 0;
2266
2267         if (!nlm)
2268                 return -1;
2269
2270         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2271         nla_put_string(nlm, IFLA_IFNAME, name);
2272
2273         if (link)
2274                 nla_put_u32(nlm, IFLA_LINK, link);
2275
2276         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2277         if (!linkinfo) {
2278                 ret = -ENOMEM;
2279                 goto failure;
2280         }
2281
2282         nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2283         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2284         if (!infodata) {
2285                 ret = -ENOMEM;
2286                 goto failure;
2287         }
2288
2289         if (link)
2290                 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2291
2292         if ((cur = tb[TUNNEL_ATTR_TTL]))
2293                 ttl = blobmsg_get_u32(cur);
2294
2295         nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2296         nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2297         nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, 4);
2298
2299         struct in6_addr in6buf;
2300         if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2301                 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2302                         ret = -EINVAL;
2303                         goto failure;
2304                 }
2305                 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2306         }
2307
2308         if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2309                 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2310                         ret = -EINVAL;
2311                         goto failure;
2312                 }
2313                 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2314         }
2315
2316 #ifdef IFLA_IPTUN_FMR_MAX
2317         if ((cur = tb[TUNNEL_ATTR_DATA])) {
2318                 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2319                 struct blob_attr *dcur;
2320                 unsigned drem, fmrcnt = 0;
2321
2322                 blobmsg_for_each_attr(dcur, cur, drem) {
2323                         if (blobmsg_type(dcur) != BLOBMSG_TYPE_ARRAY ||
2324                                         strcmp(blobmsg_name(dcur), "fmrs") ||
2325                                         blobmsg_check_array(dcur, BLOBMSG_TYPE_UNSPEC) <= 0)
2326                                 continue;
2327
2328                         struct blob_attr *rcur;
2329                         unsigned rrem;
2330                         blobmsg_for_each_attr(rcur, dcur, rrem) {
2331                                 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
2332                                 struct in6_addr ip6prefix;
2333                                 struct in_addr ip4prefix;
2334                                 unsigned ip4len, ip6len, ealen, offset;
2335
2336                                 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
2337                                                 blobmsg_data(rcur), blobmsg_len(rcur));
2338
2339                                 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
2340                                                 !parse_ip_and_netmask(AF_INET6,
2341                                                         blobmsg_data(tb_cur), &ip6prefix,
2342                                                         &ip6len)) {
2343                                         ret = -EINVAL;
2344                                         goto failure;
2345                                 }
2346
2347                                 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
2348                                                 !parse_ip_and_netmask(AF_INET,
2349                                                         blobmsg_data(tb_cur), &ip4prefix,
2350                                                         &ip4len)) {
2351                                         ret = -EINVAL;
2352                                         goto failure;
2353                                 }
2354
2355                                 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
2356                                         ret = -EINVAL;
2357                                         goto failure;
2358                                 }
2359                                 ealen = blobmsg_get_u32(tb_cur);
2360
2361                                 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
2362                                         ret = -EINVAL;
2363                                         goto failure;
2364                                 }
2365                                 offset = blobmsg_get_u32(tb_cur);
2366
2367                                 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2368
2369                                 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2370                                 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2371                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2372                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2373                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2374                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2375
2376                                 nla_nest_end(nlm, rule);
2377                         }
2378                 }
2379                 nla_nest_end(nlm, fmrs);
2380         }
2381 #endif
2382
2383         nla_nest_end(nlm, infodata);
2384         nla_nest_end(nlm, linkinfo);
2385
2386         return system_rtnl_call(nlm);
2387
2388 failure:
2389         nlmsg_free(nlm);
2390         return ret;
2391 }
2392 #endif
2393
2394 #ifdef IFLA_IPTUN_MAX
2395 #define IP6_FLOWINFO_TCLASS     htonl(0x0FF00000)
2396 static int system_add_gre_tunnel(const char *name, const char *kind,
2397                                  const unsigned int link, struct blob_attr **tb, bool v6)
2398 {
2399         struct nl_msg *nlm;
2400         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2401         struct blob_attr *cur;
2402         uint32_t ikey = 0, okey = 0, flags = 0, flowinfo = 0;
2403         uint16_t iflags = 0, oflags = 0;
2404         uint8_t tos = 0;
2405         int ret = 0, ttl = 0;
2406
2407         nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2408         if (!nlm)
2409                 return -1;
2410
2411         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2412         nla_put_string(nlm, IFLA_IFNAME, name);
2413
2414         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2415         if (!linkinfo) {
2416                 ret = -ENOMEM;
2417                 goto failure;
2418         }
2419
2420         nla_put_string(nlm, IFLA_INFO_KIND, kind);
2421         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2422         if (!infodata) {
2423                 ret = -ENOMEM;
2424                 goto failure;
2425         }
2426
2427         if (link)
2428                 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2429
2430         if ((cur = tb[TUNNEL_ATTR_TTL]))
2431                 ttl = blobmsg_get_u32(cur);
2432
2433         if ((cur = tb[TUNNEL_ATTR_TOS])) {
2434                 char *str = blobmsg_get_string(cur);
2435                 if (strcmp(str, "inherit")) {
2436                         unsigned uval;
2437
2438                         if (!system_tos_aton(str, &uval)) {
2439                                 ret = -EINVAL;
2440                                 goto failure;
2441                         }
2442
2443                         if (v6)
2444                                 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2445                         else
2446                                 tos = uval;
2447                 } else {
2448                         if (v6)
2449                                 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
2450                         else
2451                                 tos = 1;
2452                 }
2453         }
2454
2455         if ((cur = tb[TUNNEL_ATTR_DATA])) {
2456                 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
2457
2458                 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
2459                         blobmsg_data(cur), blobmsg_len(cur));
2460
2461                 if ((cur = tb_data[GRE_DATA_IKEY])) {
2462                         if ((ikey = blobmsg_get_u32(cur)))
2463                                 iflags |= GRE_KEY;
2464                 }
2465
2466                 if ((cur = tb_data[GRE_DATA_OKEY])) {
2467                         if ((okey = blobmsg_get_u32(cur)))
2468                                 oflags |= GRE_KEY;
2469                 }
2470
2471                 if ((cur = tb_data[GRE_DATA_ICSUM])) {
2472                         if (blobmsg_get_bool(cur))
2473                                 iflags |= GRE_CSUM;
2474                 }
2475
2476                 if ((cur = tb_data[GRE_DATA_OCSUM])) {
2477                         if (blobmsg_get_bool(cur))
2478                                 oflags |= GRE_CSUM;
2479                 }
2480
2481                 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
2482                         if (blobmsg_get_bool(cur))
2483                                 iflags |= GRE_SEQ;
2484                 }
2485
2486                 if ((cur = tb[GRE_DATA_OSEQNO])) {
2487                         if (blobmsg_get_bool(cur))
2488                                 oflags |= GRE_SEQ;
2489                 }
2490         }
2491
2492         if (v6) {
2493                 struct in6_addr in6buf;
2494                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2495                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2496                                 ret = -EINVAL;
2497                                 goto failure;
2498                         }
2499                         nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2500                 }
2501
2502                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2503                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2504                                 ret = -EINVAL;
2505                                 goto failure;
2506                         }
2507                         nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2508                 }
2509                 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, 4);
2510
2511                 if (flowinfo)
2512                         nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2513
2514                 if (flags)
2515                         nla_put_u32(nlm, IFLA_GRE_FLAGS, flags);
2516
2517                 if (!ttl)
2518                         ttl = 64;
2519         } else {
2520                 struct in_addr inbuf;
2521                 bool set_df = true;
2522
2523                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2524                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2525                                 ret = -EINVAL;
2526                                 goto failure;
2527                         }
2528                         nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2529                 }
2530
2531                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2532                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2533                                 ret = -EINVAL;
2534                                 goto failure;
2535                         }
2536                         nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2537
2538                         if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2539                                 if (!okey) {
2540                                         okey = inbuf.s_addr;
2541                                         oflags |= GRE_KEY;
2542                                 }
2543
2544                                 if (!ikey) {
2545                                         ikey = inbuf.s_addr;
2546                                         iflags |= GRE_KEY;
2547                                 }
2548                         }
2549                 }
2550
2551                 if ((cur = tb[TUNNEL_ATTR_DF]))
2552                         set_df = blobmsg_get_bool(cur);
2553
2554                 if (!set_df) {
2555                         /* ttl != 0 and nopmtudisc are incompatible */
2556                         if (ttl) {
2557                                 ret = -EINVAL;
2558                                 goto failure;
2559                         }
2560                 } else if (!ttl)
2561                         ttl = 64;
2562
2563                 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2564
2565                 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2566         }
2567
2568         if (ttl)
2569                 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2570
2571         if (oflags)
2572                 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2573
2574         if (iflags)
2575                 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2576
2577         if (okey)
2578                 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
2579
2580         if (ikey)
2581                 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
2582
2583         nla_nest_end(nlm, infodata);
2584         nla_nest_end(nlm, linkinfo);
2585
2586         return system_rtnl_call(nlm);
2587
2588 failure:
2589         nlmsg_free(nlm);
2590         return ret;
2591 }
2592 #endif
2593
2594 #ifdef IFLA_VTI_MAX
2595 static int system_add_vti_tunnel(const char *name, const char *kind,
2596                                  const unsigned int link, struct blob_attr **tb, bool v6)
2597 {
2598         struct nl_msg *nlm;
2599         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2600         struct blob_attr *cur;
2601         int ret = 0;
2602
2603         nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2604         if (!nlm)
2605                 return -1;
2606
2607         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2608         nla_put_string(nlm, IFLA_IFNAME, name);
2609
2610         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2611         if (!linkinfo) {
2612                 ret = -ENOMEM;
2613                 goto failure;
2614         }
2615
2616         nla_put_string(nlm, IFLA_INFO_KIND, kind);
2617         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2618         if (!infodata) {
2619                 ret = -ENOMEM;
2620                 goto failure;
2621         }
2622
2623         if (link)
2624                 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2625
2626         if (v6) {
2627                 struct in6_addr in6buf;
2628                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2629                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2630                                 ret = -EINVAL;
2631                                 goto failure;
2632                         }
2633                         nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2634                 }
2635
2636                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2637                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2638                                 ret = -EINVAL;
2639                                 goto failure;
2640                         }
2641                         nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2642                 }
2643
2644         } else {
2645                 struct in_addr inbuf;
2646
2647                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2648                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2649                                 ret = -EINVAL;
2650                                 goto failure;
2651                         }
2652                         nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2653                 }
2654
2655                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2656                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2657                                 ret = -EINVAL;
2658                                 goto failure;
2659                         }
2660                         nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2661                 }
2662
2663         }
2664
2665         if ((cur = tb[TUNNEL_ATTR_DATA])) {
2666                 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
2667                 uint32_t ikey = 0, okey = 0;
2668
2669                 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
2670                         blobmsg_data(cur), blobmsg_len(cur));
2671
2672                 if ((cur = tb_data[VTI_DATA_IKEY])) {
2673                         if ((ikey = blobmsg_get_u32(cur)))
2674                                 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2675                 }
2676
2677                 if ((cur = tb_data[VTI_DATA_OKEY])) {
2678                         if ((okey = blobmsg_get_u32(cur)))
2679                                 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2680                 }
2681         }
2682
2683         nla_nest_end(nlm, infodata);
2684         nla_nest_end(nlm, linkinfo);
2685
2686         return system_rtnl_call(nlm);
2687
2688 failure:
2689         nlmsg_free(nlm);
2690         return ret;
2691 }
2692 #endif
2693
2694 #ifdef IFLA_VXLAN_MAX
2695 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
2696 {
2697         struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
2698         struct nl_msg *msg;
2699         struct nlattr *linkinfo, *data;
2700         struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
2701         struct blob_attr *cur;
2702         int ret = 0;
2703
2704         if ((cur = tb[TUNNEL_ATTR_DATA]))
2705                 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
2706                         blobmsg_data(cur), blobmsg_len(cur));
2707         else
2708                 return -EINVAL;
2709
2710         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
2711
2712         if (!msg)
2713                 return -1;
2714
2715         nlmsg_append(msg, &iim, sizeof(iim), 0);
2716
2717         nla_put_string(msg, IFLA_IFNAME, name);
2718
2719         if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
2720                 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
2721                 if (!ea) {
2722                         ret = -EINVAL;
2723                         goto failure;
2724                 }
2725
2726                 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
2727         }
2728
2729         if ((cur = tb[TUNNEL_ATTR_MTU])) {
2730                 uint32_t mtu = blobmsg_get_u32(cur);
2731                 nla_put_u32(msg, IFLA_MTU, mtu);
2732         }
2733
2734         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
2735                 ret = -ENOMEM;
2736                 goto failure;
2737         }
2738
2739         nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
2740
2741         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
2742                 ret = -ENOMEM;
2743                 goto failure;
2744         }
2745
2746         if (link)
2747                 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
2748
2749         if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
2750                 uint32_t id = blobmsg_get_u32(cur);
2751                 if (id >= (1u << 24) - 1) {
2752                         ret = -EINVAL;
2753                         goto failure;
2754                 }
2755
2756                 nla_put_u32(msg, IFLA_VXLAN_ID, id);
2757         }
2758
2759         if (v6) {
2760                 struct in6_addr in6buf;
2761                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2762                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2763                                 ret = -EINVAL;
2764                                 goto failure;
2765                         }
2766                         nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
2767                 }
2768
2769                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2770                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2771                                 ret = -EINVAL;
2772                                 goto failure;
2773                         }
2774                         nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
2775                 }
2776         } else {
2777                 struct in_addr inbuf;
2778
2779                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2780                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2781                                 ret = -EINVAL;
2782                                 goto failure;
2783                         }
2784                         nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
2785                 }
2786
2787                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2788                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2789                                 ret = -EINVAL;
2790                                 goto failure;
2791                         }
2792                         nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
2793                 }
2794         }
2795
2796         uint32_t port = 4789;
2797         if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
2798                 port = blobmsg_get_u32(cur);
2799                 if (port < 1 || port > 65535) {
2800                         ret = -EINVAL;
2801                         goto failure;
2802                 }
2803         }
2804         nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
2805
2806         if ((cur = tb_data[VXLAN_DATA_ATTR_RXCSUM])) {
2807                 bool rxcsum = blobmsg_get_bool(cur);
2808                 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, !rxcsum);
2809         }
2810
2811         if ((cur = tb_data[VXLAN_DATA_ATTR_TXCSUM])) {
2812                 bool txcsum = blobmsg_get_bool(cur);
2813                 nla_put_u8(msg, IFLA_VXLAN_UDP_CSUM, txcsum);
2814                 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, !txcsum);
2815         }
2816
2817         if ((cur = tb[TUNNEL_ATTR_TOS])) {
2818                 char *str = blobmsg_get_string(cur);
2819                 unsigned tos = 1;
2820
2821                 if (strcmp(str, "inherit")) {
2822                         if (!system_tos_aton(str, &tos)) {
2823                                 ret = -EINVAL;
2824                                 goto failure;
2825                         }
2826                 }
2827
2828                 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
2829         }
2830
2831         if ((cur = tb[TUNNEL_ATTR_TTL])) {
2832                 uint32_t ttl = blobmsg_get_u32(cur);
2833                 if (ttl < 1 || ttl > 255) {
2834                         ret = -EINVAL;
2835                         goto failure;
2836                 }
2837
2838                 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
2839         }
2840
2841         nla_nest_end(msg, data);
2842         nla_nest_end(msg, linkinfo);
2843
2844         ret = system_rtnl_call(msg);
2845         if (ret)
2846                 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
2847
2848         return ret;
2849
2850 failure:
2851         nlmsg_free(msg);
2852         return ret;
2853 }
2854 #endif
2855
2856 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
2857 {
2858         struct blob_attr *cur;
2859         int ret = 0;
2860
2861         if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
2862                 return -1;
2863
2864 #ifdef SIOCADD6RD
2865         if ((cur = tb[TUNNEL_ATTR_DATA])) {
2866                 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
2867                 unsigned int mask;
2868                 struct ip_tunnel_6rd p6;
2869
2870                 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
2871                         blobmsg_data(cur), blobmsg_len(cur));
2872
2873                 memset(&p6, 0, sizeof(p6));
2874
2875                 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
2876                         if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
2877                                                 &p6.prefix, &mask) || mask > 128) {
2878                                 ret = -EINVAL;
2879                                 goto failure;
2880                         }
2881
2882                         p6.prefixlen = mask;
2883                 }
2884
2885                 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
2886                         if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
2887                                                 &p6.relay_prefix, &mask) || mask > 32) {
2888                                 ret = -EINVAL;
2889                                 goto failure;
2890                         }
2891
2892                         p6.relay_prefixlen = mask;
2893                 }
2894
2895                 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
2896                         ret = -1;
2897                         goto failure;
2898                 }
2899         }
2900 #endif
2901
2902         return ret;
2903
2904 failure:
2905         __system_del_ip_tunnel(name, tb);
2906         return ret;
2907 }
2908
2909 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
2910 {
2911         struct blob_attr *cur;
2912         bool set_df = true;
2913         struct ip_tunnel_parm p  = {
2914                 .link = link,
2915                 .iph = {
2916                         .version = 4,
2917                         .ihl = 5,
2918                         .protocol = proto,
2919                 }
2920         };
2921
2922         if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
2923                         inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
2924                 return -EINVAL;
2925
2926         if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
2927                         inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
2928                 return -EINVAL;
2929
2930         if ((cur = tb[TUNNEL_ATTR_DF]))
2931                 set_df = blobmsg_get_bool(cur);
2932
2933         if ((cur = tb[TUNNEL_ATTR_TTL]))
2934                 p.iph.ttl = blobmsg_get_u32(cur);
2935
2936         if ((cur = tb[TUNNEL_ATTR_TOS])) {
2937                 char *str = blobmsg_get_string(cur);
2938                 if (strcmp(str, "inherit")) {
2939                         unsigned uval;
2940
2941                         if (!system_tos_aton(str, &uval))
2942                                 return -EINVAL;
2943
2944                         p.iph.tos = uval;
2945                 } else
2946                         p.iph.tos = 1;
2947         }
2948
2949         p.iph.frag_off = set_df ? htons(IP_DF) : 0;
2950         /* ttl !=0 and nopmtudisc are incompatible */
2951         if (p.iph.ttl && p.iph.frag_off == 0)
2952                 return -EINVAL;
2953
2954         strncpy(p.name, name, sizeof(p.name));
2955
2956         switch (p.iph.protocol) {
2957         case IPPROTO_IPIP:
2958                 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
2959         case IPPROTO_IPV6:
2960                 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
2961         default:
2962                 break;
2963         }
2964         return -1;
2965 }
2966
2967 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
2968 {
2969         struct blob_attr *cur;
2970         const char *str;
2971
2972         if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2973                 return -EINVAL;
2974         str = blobmsg_data(cur);
2975
2976         if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
2977             !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
2978             !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
2979             !strcmp(str, "vxlan") || !strcmp(str, "vxlan6"))
2980                 return system_link_del(name);
2981         else
2982                 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
2983 }
2984
2985 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
2986 {
2987         struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2988
2989         blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2990                 blob_data(attr), blob_len(attr));
2991
2992         return __system_del_ip_tunnel(name, tb);
2993 }
2994
2995 int system_update_ipv6_mtu(struct device *dev, int mtu)
2996 {
2997         int ret = -1;
2998         char buf[64];
2999         int fd;
3000
3001         snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
3002                         dev->ifname);
3003
3004         fd = open(buf, O_RDWR);
3005         if (fd < 0)
3006                 return ret;
3007
3008         if (!mtu) {
3009                 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3010                 if (len < 0)
3011                         goto out;
3012
3013                 buf[len] = 0;
3014                 ret = atoi(buf);
3015         } else {
3016                 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3017                         ret = mtu;
3018         }
3019
3020 out:
3021         close(fd);
3022         return ret;
3023 }
3024
3025 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3026 {
3027         struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3028         struct blob_attr *cur;
3029         const char *str;
3030
3031         blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3032                 blob_data(attr), blob_len(attr));
3033
3034         __system_del_ip_tunnel(name, tb);
3035
3036         if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3037                 return -EINVAL;
3038         str = blobmsg_data(cur);
3039
3040         unsigned int ttl = 0;
3041         if ((cur = tb[TUNNEL_ATTR_TTL])) {
3042                 ttl = blobmsg_get_u32(cur);
3043                 if (ttl > 255)
3044                         return -EINVAL;
3045         }
3046
3047         unsigned int link = 0;
3048         if ((cur = tb[TUNNEL_ATTR_LINK])) {
3049                 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3050                 if (!iface)
3051                         return -EINVAL;
3052
3053                 if (iface->l3_dev.dev)
3054                         link = iface->l3_dev.dev->ifindex;
3055         }
3056
3057         if (!strcmp(str, "sit"))
3058                 return system_add_sit_tunnel(name, link, tb);
3059 #ifdef IFLA_IPTUN_MAX
3060         else if (!strcmp(str, "ipip6")) {
3061                 return system_add_ip6_tunnel(name, link, tb);
3062         } else if (!strcmp(str, "greip")) {
3063                 return system_add_gre_tunnel(name, "gre", link, tb, false);
3064         } else if (!strcmp(str, "gretapip"))  {
3065                 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3066         } else if (!strcmp(str, "greip6")) {
3067                 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3068         } else if (!strcmp(str, "gretapip6")) {
3069                 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3070 #ifdef IFLA_VTI_MAX
3071         } else if (!strcmp(str, "vtiip")) {
3072                 return system_add_vti_tunnel(name, "vti", link, tb, false);
3073         } else if (!strcmp(str, "vtiip6")) {
3074                 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3075 #endif
3076 #ifdef IFLA_VXLAN_MAX
3077         } else if(!strcmp(str, "vxlan")) {
3078                 return system_add_vxlan(name, link, tb, false);
3079         } else if(!strcmp(str, "vxlan6")) {
3080                 return system_add_vxlan(name, link, tb, true);
3081 #endif
3082 #endif
3083         } else if (!strcmp(str, "ipip")) {
3084                 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3085         }
3086         else
3087                 return -EINVAL;
3088
3089         return 0;
3090 }