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_multicast_router(struct device *dev, const char *val, bool bridge)
 350 {
 351         system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
 352                                        "/sys/class/net/%s/brport/multicast_router",
 353                               dev->ifname, val);
 354 }
 355
 356 static void system_bridge_set_robustness(struct device *dev, const char *val)
 357 {
 358         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
 359                               dev->ifname, val);
 360         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
 361                               dev->ifname, val);
 362 }
 363
 364 static void system_bridge_set_query_interval(struct device *dev, const char *val)
 365 {
 366         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
 367                               dev->ifname, val);
 368 }
 369
 370 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
 371 {
 372         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
 373                               dev->ifname, val);
 374 }
 375
 376 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
 377 {
 378         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
 379                               dev->ifname, val);
 380 }
 381
 382 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
 383 {
 384         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
 385                               dev->ifname, val);
 386 }
 387
 388 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
 389 {
 390         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
 391                               dev->ifname, val);
 392 }
 393
 394 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
 395 {
 396         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
 397                               dev->ifname, val);
 398 }
 399
 400 static void system_bridge_set_learning(struct device *dev, const char *val)
 401 {
 402         system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val);
 403 }
 404
 405 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
 406 {
 407         system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val);
 408 }
 409
 410 static void system_set_sendredirects(struct device *dev, const char *val)
 411 {
 412         system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, val);
 413 }
 414
 415 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
 416 {
 417         int fd = -1, ret = -1;
 418
 419         fd = open(path, O_RDONLY);
 420         if (fd < 0)
 421                 goto out;
 422
 423         ssize_t len = read(fd, buf, buf_sz - 1);
 424         if (len < 0)
 425                 goto out;
 426
 427         ret = buf[len] = 0;
 428
 429 out:
 430         if (fd >= 0)
 431                 close(fd);
 432
 433         return ret;
 434 }
 435
 436 static int
 437 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
 438 {
 439         snprintf(dev_buf, sizeof(dev_buf), path, device);
 440         return system_get_sysctl(dev_buf, buf, buf_sz);
 441 }
 442
 443 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
 444 {
 445         return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
 446                         dev->ifname, buf, buf_sz);
 447 }
 448
 449 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
 450 {
 451         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
 452                         dev->ifname, buf, buf_sz);
 453 }
 454
 455 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
 456 {
 457         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
 458                         dev->ifname, buf, buf_sz);
 459 }
 460
 461 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
 462 {
 463         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
 464                         dev->ifname, buf, buf_sz);
 465 }
 466
 467 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
 468 {
 469         return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
 470                         dev->ifname, buf, buf_sz);
 471 }
 472
 473 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
 474 {
 475         return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
 476                         dev->ifname, buf, buf_sz);
 477 }
 478
 479 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
 480 {
 481         return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
 482                         dev->ifname, buf, buf_sz);
 483 }
 484
 485 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
 486 {
 487         return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time",
 488                         dev->ifname, buf, buf_sz);
 489 }
 490
 491 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
 492 {
 493         return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time",
 494                         dev->ifname, buf, buf_sz);
 495 }
 496
 497 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
 498 {
 499         return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime",
 500                         dev->ifname, buf, buf_sz);
 501 }
 502
 503 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
 504 {
 505         return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
 506                         dev->ifname, buf, buf_sz);
 507 }
 508
 509 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
 510 {
 511         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects",
 512                         dev->ifname, buf, buf_sz);
 513 }
 514
 515 // Evaluate netlink messages
 516 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
 517 {
 518         struct nlmsghdr *nh = nlmsg_hdr(msg);
 519         struct nlattr *nla[__IFLA_MAX];
 520         int link_state = 0;
 521         char buf[10];
 522
 523         if (nh->nlmsg_type != RTM_NEWLINK)
 524                 goto out;
 525
 526         nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
 527         if (!nla[IFLA_IFNAME])
 528                 goto out;
 529
 530         struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
 531         if (!dev)
 532                 goto out;
 533
 534         if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
 535                 link_state = strtoul(buf, NULL, 0);
 536
 537         device_set_link(dev, link_state ? true : false);
 538
 539 out:
 540         return 0;
 541 }
 542
 543 static void
 544 handle_hotplug_msg(char *data, int size)
 545 {
 546         const char *subsystem = NULL, *interface = NULL;
 547         char *cur, *end, *sep;
 548         struct device *dev;
 549         int skip;
 550         bool add;
 551
 552         if (!strncmp(data, "add@", 4))
 553                 add = true;
 554         else if (!strncmp(data, "remove@", 7))
 555                 add = false;
 556         else
 557                 return;
 558
 559         skip = strlen(data) + 1;
 560         end = data + size;
 561
 562         for (cur = data + skip; cur < end; cur += skip) {
 563                 skip = strlen(cur) + 1;
 564
 565                 sep = strchr(cur, '=');
 566                 if (!sep)
 567                         continue;
 568
 569                 *sep = 0;
 570                 if (!strcmp(cur, "INTERFACE"))
 571                         interface = sep + 1;
 572                 else if (!strcmp(cur, "SUBSYSTEM")) {
 573                         subsystem = sep + 1;
 574                         if (strcmp(subsystem, "net") != 0)
 575                                 return;
 576                 }
 577                 if (subsystem && interface)
 578                         goto found;
 579         }
 580         return;
 581
 582 found:
 583         dev = device_find(interface);
 584         if (!dev)
 585                 return;
 586
 587         if (dev->type != &simple_device_type)
 588                 return;
 589
 590         if (add && system_if_force_external(dev->ifname))
 591                 return;
 592
 593         device_set_present(dev, add);
 594 }
 595
 596 static void
 597 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
 598 {
 599         struct event_socket *ev = container_of(u, struct event_socket, uloop);
 600         struct sockaddr_nl nla;
 601         unsigned char *buf = NULL;
 602         int size;
 603
 604         while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
 605                 if (nla.nl_pid == 0)
 606                         handle_hotplug_msg((char *) buf, size);
 607
 608                 free(buf);
 609         }
 610 }
 611
 612 static int system_rtnl_call(struct nl_msg *msg)
 613 {
 614         int ret;
 615
 616         ret = nl_send_auto_complete(sock_rtnl, msg);
 617         nlmsg_free(msg);
 618
 619         if (ret < 0)
 620                 return ret;
 621
 622         return nl_wait_for_ack(sock_rtnl);
 623 }
 624
 625 int system_bridge_delbr(struct device *bridge)
 626 {
 627         return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
 628 }
 629
 630 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
 631 {
 632         struct ifreq ifr;
 633
 634         memset(&ifr, 0, sizeof(ifr));
 635         if (dev)
 636                 ifr.ifr_ifindex = dev->ifindex;
 637         else
 638                 ifr.ifr_data = data;
 639         strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name));
 640         return ioctl(sock_ioctl, cmd, &ifr);
 641 }
 642
 643 static bool system_is_bridge(const char *name, char *buf, int buflen)
 644 {
 645         struct stat st;
 646
 647         snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
 648         if (stat(buf, &st) < 0)
 649                 return false;
 650
 651         return true;
 652 }
 653
 654 static char *system_get_bridge(const char *name, char *buf, int buflen)
 655 {
 656         char *path;
 657         ssize_t len = -1;
 658         glob_t gl;
 659
 660         snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
 661         if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
 662                 return NULL;
 663
 664         if (gl.gl_pathc > 0)
 665                 len = readlink(gl.gl_pathv[0], buf, buflen);
 666
 667         globfree(&gl);
 668
 669         if (len < 0)
 670                 return NULL;
 671
 672         buf[len] = 0;
 673         path = strrchr(buf, '/');
 674         if (!path)
 675                 return NULL;
 676
 677         return path + 1;
 678 }
 679
 680 static void
 681 system_bridge_set_wireless(struct device *bridge, struct device *dev)
 682 {
 683         bool mcast_to_ucast = dev->wireless_ap;
 684         bool hairpin = true;
 685
 686         if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
 687             !bridge->settings.multicast_to_unicast)
 688                 mcast_to_ucast = false;
 689
 690         if (!mcast_to_ucast || dev->wireless_isolate)
 691                 hairpin = false;
 692
 693         system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
 694         system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
 695 }
 696
 697 int system_bridge_addif(struct device *bridge, struct device *dev)
 698 {
 699         char buf[64];
 700         char *oldbr;
 701         int ret = 0;
 702
 703         oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
 704         if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
 705                 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
 706
 707         if (dev->wireless)
 708                 system_bridge_set_wireless(bridge, dev);
 709
 710         if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
 711                 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
 712                 system_bridge_set_multicast_router(dev, buf, false);
 713         }
 714
 715         if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
 716             dev->settings.multicast_fast_leave)
 717                 system_bridge_set_multicast_fast_leave(dev, "1");
 718
 719         if (dev->settings.flags & DEV_OPT_LEARNING &&
 720             !dev->settings.learning)
 721                 system_bridge_set_learning(dev, "0");
 722
 723         if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
 724             !dev->settings.unicast_flood)
 725                 system_bridge_set_unicast_flood(dev, "0");
 726
 727         return ret;
 728 }
 729
 730 int system_bridge_delif(struct device *bridge, struct device *dev)
 731 {
 732         return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
 733 }
 734
 735 int system_if_resolve(struct device *dev)
 736 {
 737         struct ifreq ifr;
 738         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
 739         if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
 740                 return ifr.ifr_ifindex;
 741         else
 742                 return 0;
 743 }
 744
 745 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
 746 {
 747         struct ifreq ifr;
 748
 749         memset(&ifr, 0, sizeof(ifr));
 750         strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
 751         ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr);
 752         ifr.ifr_flags |= add;
 753         ifr.ifr_flags &= ~rem;
 754         return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
 755 }
 756
 757 struct clear_data {
 758         struct nl_msg *msg;
 759         struct device *dev;
 760         int type;
 761         int size;
 762         int af;
 763 };
 764
 765
 766 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
 767 {
 768         struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
 769
 770         return ifa->ifa_index == ifindex;
 771 }
 772
 773 static bool check_route(struct nlmsghdr *hdr, int ifindex)
 774 {
 775         struct rtmsg *r = NLMSG_DATA(hdr);
 776         struct nlattr *tb[__RTA_MAX];
 777
 778         if (r->rtm_protocol == RTPROT_KERNEL &&
 779             r->rtm_family == AF_INET6)
 780                 return false;
 781
 782         nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
 783         if (!tb[RTA_OIF])
 784                 return false;
 785
 786         return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
 787 }
 788
 789 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
 790 {
 791         return true;
 792 }
 793
 794 static int cb_clear_event(struct nl_msg *msg, void *arg)
 795 {
 796         struct clear_data *clr = arg;
 797         struct nlmsghdr *hdr = nlmsg_hdr(msg);
 798         bool (*cb)(struct nlmsghdr *, int ifindex);
 799         int type;
 800
 801         switch(clr->type) {
 802         case RTM_GETADDR:
 803                 type = RTM_DELADDR;
 804                 if (hdr->nlmsg_type != RTM_NEWADDR)
 805                         return NL_SKIP;
 806
 807                 cb = check_ifaddr;
 808                 break;
 809         case RTM_GETROUTE:
 810                 type = RTM_DELROUTE;
 811                 if (hdr->nlmsg_type != RTM_NEWROUTE)
 812                         return NL_SKIP;
 813
 814                 cb = check_route;
 815                 break;
 816         case RTM_GETRULE:
 817                 type = RTM_DELRULE;
 818                 if (hdr->nlmsg_type != RTM_NEWRULE)
 819                         return NL_SKIP;
 820
 821                 cb = check_rule;
 822                 break;
 823         default:
 824                 return NL_SKIP;
 825         }
 826
 827         if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
 828                 return NL_SKIP;
 829
 830         if (type == RTM_DELRULE)
 831                 D(SYSTEM, "Remove a rule\n");
 832         else
 833                 D(SYSTEM, "Remove %s from device %s\n",
 834                   type == RTM_DELADDR ? "an address" : "a route",
 835                   clr->dev->ifname);
 836         memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
 837         hdr = nlmsg_hdr(clr->msg);
 838         hdr->nlmsg_type = type;
 839         hdr->nlmsg_flags = NLM_F_REQUEST;
 840
 841         nl_socket_disable_auto_ack(sock_rtnl);
 842         nl_send_auto_complete(sock_rtnl, clr->msg);
 843         nl_socket_enable_auto_ack(sock_rtnl);
 844
 845         return NL_SKIP;
 846 }
 847
 848 static int
 849 cb_finish_event(struct nl_msg *msg, void *arg)
 850 {
 851         int *pending = arg;
 852         *pending = 0;
 853         return NL_STOP;
 854 }
 855
 856 static int
 857 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
 858 {
 859         int *pending = arg;
 860         *pending = err->error;
 861         return NL_STOP;
 862 }
 863
 864 static void
 865 system_if_clear_entries(struct device *dev, int type, int af)
 866 {
 867         struct clear_data clr;
 868         struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
 869         struct rtmsg rtm = {
 870                 .rtm_family = af,
 871                 .rtm_flags = RTM_F_CLONED,
 872         };
 873         int flags = NLM_F_DUMP;
 874         int pending = 1;
 875
 876         clr.af = af;
 877         clr.dev = dev;
 878         clr.type = type;
 879         switch (type) {
 880         case RTM_GETADDR:
 881         case RTM_GETRULE:
 882                 clr.size = sizeof(struct rtgenmsg);
 883                 break;
 884         case RTM_GETROUTE:
 885                 clr.size = sizeof(struct rtmsg);
 886                 break;
 887         default:
 888                 return;
 889         }
 890
 891         if (!cb)
 892                 return;
 893
 894         clr.msg = nlmsg_alloc_simple(type, flags);
 895         if (!clr.msg)
 896                 goto out;
 897
 898         nlmsg_append(clr.msg, &rtm, clr.size, 0);
 899         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
 900         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
 901         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
 902
 903         nl_send_auto_complete(sock_rtnl, clr.msg);
 904         while (pending > 0)
 905                 nl_recvmsgs(sock_rtnl, cb);
 906
 907         nlmsg_free(clr.msg);
 908 out:
 909         nl_cb_put(cb);
 910 }
 911
 912 /*
 913  * Clear bridge (membership) state and bring down device
 914  */
 915 void system_if_clear_state(struct device *dev)
 916 {
 917         static char buf[256];
 918         char *bridge;
 919
 920         device_set_ifindex(dev, system_if_resolve(dev));
 921         if (dev->external || !dev->ifindex)
 922                 return;
 923
 924         system_if_flags(dev->ifname, 0, IFF_UP);
 925
 926         if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
 927                 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
 928                 system_bridge_delbr(dev);
 929                 return;
 930         }
 931
 932         bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
 933         if (bridge) {
 934                 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
 935                 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
 936         }
 937
 938         system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
 939         system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
 940         system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
 941         system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
 942         system_set_disable_ipv6(dev, "0");
 943 }
 944
 945 static inline unsigned long
 946 sec_to_jiffies(int val)
 947 {
 948         return (unsigned long) val * 100;
 949 }
 950
 951 static void system_bridge_conf_multicast_deps(struct device *bridge,
 952                                               struct bridge_config *cfg,
 953                                               char *buf,
 954                                               int buf_len)
 955 {
 956         int val;
 957
 958         if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
 959             cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
 960             cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
 961                 val = cfg->robustness * cfg->query_interval +
 962                         cfg->query_response_interval;
 963
 964                 snprintf(buf, buf_len, "%i", val);
 965                 system_bridge_set_membership_interval(bridge, buf);
 966
 967                 val = cfg->robustness * cfg->query_interval +
 968                         cfg->query_response_interval / 2;
 969
 970                 snprintf(buf, buf_len, "%i", val);
 971                 system_bridge_set_other_querier_timeout(bridge, buf);
 972         }
 973
 974         if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
 975                 val = cfg->query_interval / 4;
 976
 977                 snprintf(buf, buf_len, "%i", val);
 978                 system_bridge_set_startup_query_interval(bridge, buf);
 979         }
 980 }
 981
 982 static void system_bridge_conf_multicast(struct device *bridge,
 983                                          struct bridge_config *cfg,
 984                                          char *buf,
 985                                          int buf_len)
 986 {
 987         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
 988                 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
 989
 990         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
 991                 bridge->ifname, cfg->multicast_querier ? "1" : "0");
 992
 993         snprintf(buf, buf_len, "%i", cfg->hash_max);
 994         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
 995                 bridge->ifname, buf);
 996
 997         if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
 998                 snprintf(buf, buf_len, "%u", bridge->settings.multicast_router);
 999                 system_bridge_set_multicast_router(bridge, buf, true);
1000         }
1001
1002         if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1003                 snprintf(buf, buf_len, "%i", cfg->robustness);
1004                 system_bridge_set_robustness(bridge, buf);
1005         }
1006
1007         if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1008                 snprintf(buf, buf_len, "%i", cfg->query_interval);
1009                 system_bridge_set_query_interval(bridge, buf);
1010         }
1011
1012         if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1013                 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1014                 system_bridge_set_query_response_interval(bridge, buf);
1015         }
1016
1017         if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1018                 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1019                 system_bridge_set_last_member_interval(bridge, buf);
1020         }
1021
1022         system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1023 }
1024
1025 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1026 {
1027         char buf[64];
1028         unsigned long args[4] = {};
1029
1030         if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1031                 return -1;
1032
1033         args[0] = BRCTL_SET_BRIDGE_STP_STATE;
1034         args[1] = !!cfg->stp;
1035         system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1036
1037         args[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY;
1038         args[1] = sec_to_jiffies(cfg->forward_delay);
1039         system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1040
1041         system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1042
1043         args[0] = BRCTL_SET_BRIDGE_PRIORITY;
1044         args[1] = cfg->priority;
1045         system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1046
1047         if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1048                 args[0] = BRCTL_SET_AGEING_TIME;
1049                 args[1] = sec_to_jiffies(cfg->ageing_time);
1050                 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1051         }
1052
1053         if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
1054                 args[0] = BRCTL_SET_BRIDGE_HELLO_TIME;
1055                 args[1] = sec_to_jiffies(cfg->hello_time);
1056                 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1057         }
1058
1059         if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1060                 args[0] = BRCTL_SET_BRIDGE_MAX_AGE;
1061                 args[1] = sec_to_jiffies(cfg->max_age);
1062                 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1063         }
1064
1065         return 0;
1066 }
1067
1068 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1069 {
1070         struct nl_msg *msg;
1071         struct nlattr *linkinfo, *data;
1072         struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1073         int i, rv;
1074         static const struct {
1075                 const char *name;
1076                 enum macvlan_mode val;
1077         } modes[] = {
1078                 { "private", MACVLAN_MODE_PRIVATE },
1079                 { "vepa", MACVLAN_MODE_VEPA },
1080                 { "bridge", MACVLAN_MODE_BRIDGE },
1081                 { "passthru", MACVLAN_MODE_PASSTHRU },
1082         };
1083
1084         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1085
1086         if (!msg)
1087                 return -1;
1088
1089         nlmsg_append(msg, &iim, sizeof(iim), 0);
1090
1091         if (cfg->flags & MACVLAN_OPT_MACADDR)
1092                 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1093         nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1094         nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1095
1096         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1097                 goto nla_put_failure;
1098
1099         nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1100
1101         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1102                 goto nla_put_failure;
1103
1104         if (cfg->mode) {
1105                 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1106                         if (strcmp(cfg->mode, modes[i].name) != 0)
1107                                 continue;
1108
1109                         nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1110                         break;
1111                 }
1112         }
1113
1114         nla_nest_end(msg, data);
1115         nla_nest_end(msg, linkinfo);
1116
1117         rv = system_rtnl_call(msg);
1118         if (rv)
1119                 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1120
1121         return rv;
1122
1123 nla_put_failure:
1124         nlmsg_free(msg);
1125         return -ENOMEM;
1126 }
1127
1128 static int system_link_del(const char *ifname)
1129 {
1130         struct nl_msg *msg;
1131         struct ifinfomsg iim = {
1132                 .ifi_family = AF_UNSPEC,
1133                 .ifi_index = 0,
1134         };
1135
1136         msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1137
1138         if (!msg)
1139                 return -1;
1140
1141         nlmsg_append(msg, &iim, sizeof(iim), 0);
1142         nla_put_string(msg, IFLA_IFNAME, ifname);
1143         return system_rtnl_call(msg);
1144 }
1145
1146 int system_macvlan_del(struct device *macvlan)
1147 {
1148         return system_link_del(macvlan->ifname);
1149 }
1150
1151 int system_veth_add(struct device *veth, struct veth_config *cfg)
1152 {
1153         struct nl_msg *msg;
1154         struct ifinfomsg empty_iim = {};
1155         struct nlattr *linkinfo, *data, *veth_info;
1156         int rv;
1157
1158         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1159
1160         if (!msg)
1161                 return -1;
1162
1163         nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1164
1165         if (cfg->flags & VETH_OPT_MACADDR)
1166                 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1167         nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1168
1169         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1170                 goto nla_put_failure;
1171
1172         nla_put_string(msg, IFLA_INFO_KIND, "veth");
1173
1174         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1175                 goto nla_put_failure;
1176
1177         if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1178                 goto nla_put_failure;
1179
1180         nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1181
1182         if (cfg->flags & VETH_OPT_PEER_NAME)
1183                 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1184         if (cfg->flags & VETH_OPT_PEER_MACADDR)
1185                 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1186
1187         nla_nest_end(msg, veth_info);
1188         nla_nest_end(msg, data);
1189         nla_nest_end(msg, linkinfo);
1190
1191         rv = system_rtnl_call(msg);
1192         if (rv) {
1193                 if (cfg->flags & VETH_OPT_PEER_NAME)
1194                         D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1195                 else
1196                         D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1197         }
1198
1199         return rv;
1200
1201 nla_put_failure:
1202         nlmsg_free(msg);
1203         return -ENOMEM;
1204 }
1205
1206 int system_veth_del(struct device *veth)
1207 {
1208         return system_link_del(veth->ifname);
1209 }
1210
1211 static int system_vlan(struct device *dev, int id)
1212 {
1213         struct vlan_ioctl_args ifr = {
1214                 .cmd = SET_VLAN_NAME_TYPE_CMD,
1215                 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1216         };
1217
1218         ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1219
1220         if (id < 0) {
1221                 ifr.cmd = DEL_VLAN_CMD;
1222                 ifr.u.VID = 0;
1223         } else {
1224                 ifr.cmd = ADD_VLAN_CMD;
1225                 ifr.u.VID = id;
1226         }
1227         strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1228         return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1229 }
1230
1231 int system_vlan_add(struct device *dev, int id)
1232 {
1233         return system_vlan(dev, id);
1234 }
1235
1236 int system_vlan_del(struct device *dev)
1237 {
1238         return system_vlan(dev, -1);
1239 }
1240
1241 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1242 {
1243         struct nl_msg *msg;
1244         struct nlattr *linkinfo, *data;
1245         struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1246         int rv;
1247
1248         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1249
1250         if (!msg)
1251                 return -1;
1252
1253         nlmsg_append(msg, &iim, sizeof(iim), 0);
1254         nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1255         nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1256
1257         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1258                 goto nla_put_failure;
1259
1260         nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1261
1262         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1263                 goto nla_put_failure;
1264
1265         nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1266
1267 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1268         nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1269 #else
1270         if(cfg->proto == VLAN_PROTO_8021AD)
1271                 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);
1272 #endif
1273
1274         nla_nest_end(msg, data);
1275         nla_nest_end(msg, linkinfo);
1276
1277         rv = system_rtnl_call(msg);
1278         if (rv)
1279                 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1280
1281         return rv;
1282
1283 nla_put_failure:
1284         nlmsg_free(msg);
1285         return -ENOMEM;
1286 }
1287
1288 int system_vlandev_del(struct device *vlandev)
1289 {
1290         return system_link_del(vlandev->ifname);
1291 }
1292
1293 void
1294 system_if_get_settings(struct device *dev, struct device_settings *s)
1295 {
1296         struct ifreq ifr;
1297         char buf[10];
1298
1299         memset(&ifr, 0, sizeof(ifr));
1300         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1301
1302         if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1303                 s->mtu = ifr.ifr_mtu;
1304                 s->flags |= DEV_OPT_MTU;
1305         }
1306
1307         s->mtu6 = system_update_ipv6_mtu(dev, 0);
1308         if (s->mtu6 > 0)
1309                 s->flags |= DEV_OPT_MTU6;
1310
1311         if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1312                 s->txqueuelen = ifr.ifr_qlen;
1313                 s->flags |= DEV_OPT_TXQUEUELEN;
1314         }
1315
1316         if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1317                 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1318                 s->flags |= DEV_OPT_MACADDR;
1319         }
1320
1321         if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1322                 s->ipv6 = !strtoul(buf, NULL, 0);
1323                 s->flags |= DEV_OPT_IPV6;
1324         }
1325
1326         if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1327                 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1328                 s->flags |= DEV_OPT_PROMISC;
1329
1330                 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1331                 s->flags |= DEV_OPT_MULTICAST;
1332         }
1333
1334         if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1335                 s->rpfilter = strtoul(buf, NULL, 0);
1336                 s->flags |= DEV_OPT_RPFILTER;
1337         }
1338
1339         if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1340                 s->acceptlocal = strtoul(buf, NULL, 0);
1341                 s->flags |= DEV_OPT_ACCEPTLOCAL;
1342         }
1343
1344         if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1345                 s->igmpversion = strtoul(buf, NULL, 0);
1346                 s->flags |= DEV_OPT_IGMPVERSION;
1347         }
1348
1349         if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1350                 s->mldversion = strtoul(buf, NULL, 0);
1351                 s->flags |= DEV_OPT_MLDVERSION;
1352         }
1353
1354         if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1355                 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1356                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1357         }
1358
1359         if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1360                 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1361                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1362         }
1363
1364         if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1365                 s->neigh4locktime = strtol(buf, NULL, 0);
1366                 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1367         }
1368
1369         if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1370                 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1371                 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1372         }
1373
1374         if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1375                 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1376                 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1377         }
1378
1379         if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1380                 s->dadtransmits = strtoul(buf, NULL, 0);
1381                 s->flags |= DEV_OPT_DADTRANSMITS;
1382         }
1383
1384         if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1385                 s->sendredirects = strtoul(buf, NULL, 0);
1386                 s->flags |= DEV_OPT_SENDREDIRECTS;
1387         }
1388 }
1389
1390 static void
1391 system_if_set_rps_xps_val(const char *path, char *fmt, int val)
1392 {
1393         char val_buf[8];
1394         glob_t gl;
1395         int i;
1396
1397         if (glob(path, 0, NULL, &gl))
1398                 return;
1399
1400         snprintf(val_buf, sizeof(val_buf), fmt, val);
1401         for (i = 0; i < gl.gl_pathc; i++)
1402                 system_set_sysctl(gl.gl_pathv[i], val_buf);
1403
1404         globfree(&gl);
1405 }
1406
1407 static void
1408 system_if_apply_rps_xps(struct device *dev, struct device_settings *s)
1409 {
1410         long n_cpus = sysconf(_SC_NPROCESSORS_ONLN);
1411         int val, rps_val, rps_flow_cnt, xps_val;
1412
1413         if (n_cpus < 2)
1414                 return;
1415
1416         val = (1 << n_cpus) - 1;
1417         rps_val = s->rps_val ? s->rps_val : val;
1418         snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/rps_cpus", dev->ifname);
1419         system_if_set_rps_xps_val(dev_buf, "%x", s->rps ? rps_val : 0);
1420
1421         rps_flow_cnt = s->rps_flow_cnt ? s->rps_flow_cnt : 0;
1422         snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/rps_flow_cnt", dev->ifname);
1423         system_if_set_rps_xps_val(dev_buf, "%d", s->rps ? rps_flow_cnt : 0);
1424
1425         xps_val = s->xps_val ? s->xps_val : val;
1426         snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/xps_cpus", dev->ifname);
1427         system_if_set_rps_xps_val(dev_buf, "%x", s->xps ? xps_val : 0);
1428 }
1429
1430 void
1431 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1432 {
1433         struct ifreq ifr;
1434         char buf[12];
1435
1436         memset(&ifr, 0, sizeof(ifr));
1437         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1438         if (s->flags & DEV_OPT_MTU & apply_mask) {
1439                 ifr.ifr_mtu = s->mtu;
1440                 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1441                         s->flags &= ~DEV_OPT_MTU;
1442         }
1443         if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1444                 system_update_ipv6_mtu(dev, s->mtu6);
1445         }
1446         if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1447                 ifr.ifr_qlen = s->txqueuelen;
1448                 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1449                         s->flags &= ~DEV_OPT_TXQUEUELEN;
1450         }
1451         if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1452                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1453                 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1454                 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1455                         s->flags &= ~DEV_OPT_MACADDR;
1456         }
1457         if (s->flags & DEV_OPT_IPV6 & apply_mask)
1458                 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1459         if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1460                 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1461                                     !s->promisc ? IFF_PROMISC : 0) < 0)
1462                         s->flags &= ~DEV_OPT_PROMISC;
1463         }
1464         if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1465                 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1466                 system_set_rpfilter(dev, buf);
1467         }
1468         if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1469                 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1470         if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1471                 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1472                 system_set_igmpversion(dev, buf);
1473         }
1474         if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1475                 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1476                 system_set_mldversion(dev, buf);
1477         }
1478         if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1479                 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1480                 system_set_neigh4reachabletime(dev, buf);
1481                 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1482                 system_set_neigh6reachabletime(dev, buf);
1483         }
1484         if (s->flags & DEV_OPT_NEIGHLOCKTIME & apply_mask) {
1485                 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1486                 system_set_neigh4locktime(dev, buf);
1487         }
1488         if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1489                 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1490                 system_set_neigh4gcstaletime(dev, buf);
1491                 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1492                 system_set_neigh6gcstaletime(dev, buf);
1493         }
1494         if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1495                 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1496                 system_set_dadtransmits(dev, buf);
1497         }
1498         if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1499                 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1500                                     !s->multicast ? IFF_MULTICAST : 0) < 0)
1501                         s->flags &= ~DEV_OPT_MULTICAST;
1502         }
1503         if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1504                 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1505
1506         system_if_apply_rps_xps(dev, s);
1507 }
1508
1509 int system_if_up(struct device *dev)
1510 {
1511         system_if_get_settings(dev, &dev->orig_settings);
1512         /* Only keep orig settings based on what needs to be set */
1513         dev->orig_settings.valid_flags = dev->orig_settings.flags;
1514         dev->orig_settings.flags &= dev->settings.flags;
1515         system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1516         return system_if_flags(dev->ifname, IFF_UP, 0);
1517 }
1518
1519 int system_if_down(struct device *dev)
1520 {
1521         int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1522         system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1523         return ret;
1524 }
1525
1526 struct if_check_data {
1527         struct device *dev;
1528         int pending;
1529         int ret;
1530 };
1531
1532 #ifndef IFF_LOWER_UP
1533 #define IFF_LOWER_UP    0x10000
1534 #endif
1535
1536 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1537 {
1538         struct nlmsghdr *nh = nlmsg_hdr(msg);
1539         struct ifinfomsg *ifi = NLMSG_DATA(nh);
1540         struct if_check_data *chk = (struct if_check_data *)arg;
1541
1542         if (nh->nlmsg_type != RTM_NEWLINK)
1543                 return NL_SKIP;
1544
1545         device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1546         device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1547
1548         return NL_OK;
1549 }
1550
1551 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1552 {
1553         struct if_check_data *chk = (struct if_check_data *)arg;
1554         chk->pending = 0;
1555         return NL_STOP;
1556 }
1557
1558 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1559 {
1560         struct if_check_data *chk = (struct if_check_data *)arg;
1561
1562         device_set_present(chk->dev, false);
1563         device_set_link(chk->dev, false);
1564         chk->pending = err->error;
1565
1566         return NL_STOP;
1567 }
1568
1569 int system_if_check(struct device *dev)
1570 {
1571         struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1572         struct nl_msg *msg;
1573         struct ifinfomsg ifi = {
1574                 .ifi_family = AF_UNSPEC,
1575                 .ifi_index = 0,
1576         };
1577         struct if_check_data chk = {
1578                 .dev = dev,
1579                 .pending = 1,
1580         };
1581         int ret = 1;
1582
1583         msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1584         if (!msg)
1585                 goto out;
1586
1587         if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1588             nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1589                 goto free;
1590
1591         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1592         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1593         nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1594
1595         nl_send_auto_complete(sock_rtnl, msg);
1596         while (chk.pending > 0)
1597                 nl_recvmsgs(sock_rtnl, cb);
1598
1599         ret = chk.pending;
1600
1601 free:
1602         nlmsg_free(msg);
1603 out:
1604         nl_cb_put(cb);
1605         return ret;
1606 }
1607
1608 struct device *
1609 system_if_get_parent(struct device *dev)
1610 {
1611         char buf[64], *devname;
1612         int ifindex, iflink, len;
1613         FILE *f;
1614
1615         snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1616         f = fopen(buf, "r");
1617         if (!f)
1618                 return NULL;
1619
1620         len = fread(buf, 1, sizeof(buf) - 1, f);
1621         fclose(f);
1622
1623         if (len <= 0)
1624                 return NULL;
1625
1626         buf[len] = 0;
1627         iflink = strtoul(buf, NULL, 0);
1628         ifindex = system_if_resolve(dev);
1629         if (!iflink || iflink == ifindex)
1630                 return NULL;
1631
1632         devname = if_indextoname(iflink, buf);
1633         if (!devname)
1634                 return NULL;
1635
1636         return device_get(devname, true);
1637 }
1638
1639 static bool
1640 read_string_file(int dir_fd, const char *file, char *buf, int len)
1641 {
1642         bool ret = false;
1643         char *c;
1644         int fd;
1645
1646         fd = openat(dir_fd, file, O_RDONLY);
1647         if (fd < 0)
1648                 return false;
1649
1650 retry:
1651         len = read(fd, buf, len - 1);
1652         if (len < 0) {
1653                 if (errno == EINTR)
1654                         goto retry;
1655         } else if (len > 0) {
1656                         buf[len] = 0;
1657
1658                         c = strchr(buf, '\n');
1659                         if (c)
1660                                 *c = 0;
1661
1662                         ret = true;
1663         }
1664
1665         close(fd);
1666
1667         return ret;
1668 }
1669
1670 static bool
1671 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1672 {
1673         char buf[64];
1674         bool ret = false;
1675
1676         ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1677         if (ret)
1678                 *val = strtoull(buf, NULL, 0);
1679
1680         return ret;
1681 }
1682
1683 /* Assume advertised flags == supported flags */
1684 static const struct {
1685         uint32_t mask;
1686         const char *name;
1687 } ethtool_link_modes[] = {
1688         { ADVERTISED_10baseT_Half, "10H" },
1689         { ADVERTISED_10baseT_Full, "10F" },
1690         { ADVERTISED_100baseT_Half, "100H" },
1691         { ADVERTISED_100baseT_Full, "100F" },
1692         { ADVERTISED_1000baseT_Half, "1000H" },
1693         { ADVERTISED_1000baseT_Full, "1000F" },
1694 };
1695
1696 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1697 {
1698         int i;
1699         for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1700                 if (mask & ethtool_link_modes[i].mask)
1701                         blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1702         }
1703 }
1704
1705 bool
1706 system_if_force_external(const char *ifname)
1707 {
1708         char buf[64];
1709         struct stat s;
1710
1711         snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1712         return stat(buf, &s) == 0;
1713 }
1714
1715 int
1716 system_if_dump_info(struct device *dev, struct blob_buf *b)
1717 {
1718         struct ethtool_cmd ecmd;
1719         struct ifreq ifr;
1720         char buf[64], *s;
1721         void *c;
1722         int dir_fd;
1723
1724         snprintf(buf, sizeof(buf), "/sys/class/net/%s", dev->ifname);
1725         dir_fd = open(buf, O_DIRECTORY);
1726
1727         memset(&ecmd, 0, sizeof(ecmd));
1728         memset(&ifr, 0, sizeof(ifr));
1729         strcpy(ifr.ifr_name, dev->ifname);
1730         ifr.ifr_data = (caddr_t) &ecmd;
1731         ecmd.cmd = ETHTOOL_GSET;
1732
1733         if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1734                 c = blobmsg_open_array(b, "link-advertising");
1735                 system_add_link_modes(b, ecmd.advertising);
1736                 blobmsg_close_array(b, c);
1737
1738                 c = blobmsg_open_array(b, "link-supported");
1739                 system_add_link_modes(b, ecmd.supported);
1740                 blobmsg_close_array(b, c);
1741
1742                 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1743                 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1744                         ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1745                 blobmsg_add_string_buffer(b);
1746         }
1747
1748         close(dir_fd);
1749         return 0;
1750 }
1751
1752 int
1753 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1754 {
1755         const char *const counters[] = {
1756                 "collisions",     "rx_frame_errors",   "tx_compressed",
1757                 "multicast",      "rx_length_errors",  "tx_dropped",
1758                 "rx_bytes",       "rx_missed_errors",  "tx_errors",
1759                 "rx_compressed",  "rx_over_errors",    "tx_fifo_errors",
1760                 "rx_crc_errors",  "rx_packets",        "tx_heartbeat_errors",
1761                 "rx_dropped",     "tx_aborted_errors", "tx_packets",
1762                 "rx_errors",      "tx_bytes",          "tx_window_errors",
1763                 "rx_fifo_errors", "tx_carrier_errors",
1764         };
1765         char buf[64];
1766         int stats_dir;
1767         int i;
1768         uint64_t val = 0;
1769
1770         snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1771         stats_dir = open(buf, O_DIRECTORY);
1772         if (stats_dir < 0)
1773                 return -1;
1774
1775         for (i = 0; i < ARRAY_SIZE(counters); i++)
1776                 if (read_uint64_file(stats_dir, counters[i], &val))
1777                         blobmsg_add_u64(b, counters[i], val);
1778
1779         close(stats_dir);
1780         return 0;
1781 }
1782
1783 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1784 {
1785         bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1786         int alen = v4 ? 4 : 16;
1787         unsigned int flags = 0;
1788         struct ifaddrmsg ifa = {
1789                 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1790                 .ifa_prefixlen = addr->mask,
1791                 .ifa_index = dev->ifindex,
1792         };
1793
1794         struct nl_msg *msg;
1795         if (cmd == RTM_NEWADDR)
1796                 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1797
1798         msg = nlmsg_alloc_simple(cmd, flags);
1799         if (!msg)
1800                 return -1;
1801
1802         nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1803         nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1804         if (v4) {
1805                 if (addr->broadcast)
1806                         nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1807                 if (addr->point_to_point)
1808                         nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1809         } else {
1810                 time_t now = system_get_rtime();
1811                 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1812
1813                 if (addr->preferred_until) {
1814                         int64_t preferred = addr->preferred_until - now;
1815                         if (preferred < 0)
1816                                 preferred = 0;
1817                         else if (preferred > UINT32_MAX)
1818                                 preferred = UINT32_MAX;
1819
1820                         cinfo.ifa_prefered = preferred;
1821                 }
1822
1823                 if (addr->valid_until) {
1824                         int64_t valid = addr->valid_until - now;
1825                         if (valid <= 0) {
1826                                 nlmsg_free(msg);
1827                                 return -1;
1828                         }
1829                         else if (valid > UINT32_MAX)
1830                                 valid = UINT32_MAX;
1831
1832                         cinfo.ifa_valid = valid;
1833                 }
1834
1835                 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1836
1837                 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1838                         nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1839         }
1840
1841         return system_rtnl_call(msg);
1842 }
1843
1844 int system_add_address(struct device *dev, struct device_addr *addr)
1845 {
1846         return system_addr(dev, addr, RTM_NEWADDR);
1847 }
1848
1849 int system_del_address(struct device *dev, struct device_addr *addr)
1850 {
1851         return system_addr(dev, addr, RTM_DELADDR);
1852 }
1853
1854 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1855 {
1856         int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1857         bool have_gw;
1858         unsigned int flags = 0;
1859
1860         if (alen == 4)
1861                 have_gw = !!route->nexthop.in.s_addr;
1862         else
1863                 have_gw = route->nexthop.in6.s6_addr32[0] ||
1864                         route->nexthop.in6.s6_addr32[1] ||
1865                         route->nexthop.in6.s6_addr32[2] ||
1866                         route->nexthop.in6.s6_addr32[3];
1867
1868         unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
1869                         ? route->table : RT_TABLE_MAIN;
1870
1871         struct rtmsg rtm = {
1872                 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1873                 .rtm_dst_len = route->mask,
1874                 .rtm_src_len = route->sourcemask,
1875                 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
1876                 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
1877                 .rtm_scope = RT_SCOPE_NOWHERE,
1878                 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
1879                 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
1880         };
1881         struct nl_msg *msg;
1882
1883         if (cmd == RTM_NEWROUTE) {
1884                 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1885
1886                 if (!dev) { // Add null-route
1887                         rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1888                         rtm.rtm_type = RTN_UNREACHABLE;
1889                 }
1890                 else
1891                         rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
1892         }
1893
1894         if (route->flags & DEVROUTE_TYPE) {
1895                 rtm.rtm_type = route->type;
1896                 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
1897                         if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
1898                             rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
1899                                 rtm.rtm_table = RT_TABLE_LOCAL;
1900                 }
1901
1902                 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
1903                         rtm.rtm_scope = RT_SCOPE_HOST;
1904                 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
1905                                 rtm.rtm_type == RTN_ANYCAST) {
1906                         rtm.rtm_scope = RT_SCOPE_LINK;
1907                 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
1908                                 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
1909                                 rtm.rtm_type == RTN_THROW) {
1910                         rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1911                         dev = NULL;
1912                 }
1913         }
1914
1915         msg = nlmsg_alloc_simple(cmd, flags);
1916         if (!msg)
1917                 return -1;
1918
1919         nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1920
1921         if (route->mask)
1922                 nla_put(msg, RTA_DST, alen, &route->addr);
1923
1924         if (route->sourcemask) {
1925                 if (rtm.rtm_family == AF_INET)
1926                         nla_put(msg, RTA_PREFSRC, alen, &route->source);
1927                 else
1928                         nla_put(msg, RTA_SRC, alen, &route->source);
1929         }
1930
1931         if (route->metric > 0)
1932                 nla_put_u32(msg, RTA_PRIORITY, route->metric);
1933
1934         if (have_gw)
1935                 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
1936
1937         if (dev)
1938                 nla_put_u32(msg, RTA_OIF, dev->ifindex);
1939
1940         if (table >= 256)
1941                 nla_put_u32(msg, RTA_TABLE, table);
1942
1943         if (route->flags & DEVROUTE_MTU) {
1944                 struct nlattr *metrics;
1945
1946                 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
1947                         goto nla_put_failure;
1948
1949                 nla_put_u32(msg, RTAX_MTU, route->mtu);
1950
1951                 nla_nest_end(msg, metrics);
1952         }
1953
1954         return system_rtnl_call(msg);
1955
1956 nla_put_failure:
1957         nlmsg_free(msg);
1958         return -ENOMEM;
1959 }
1960
1961 int system_add_route(struct device *dev, struct device_route *route)
1962 {
1963         return system_rt(dev, route, RTM_NEWROUTE);
1964 }
1965
1966 int system_del_route(struct device *dev, struct device_route *route)
1967 {
1968         return system_rt(dev, route, RTM_DELROUTE);
1969 }
1970
1971 int system_flush_routes(void)
1972 {
1973         const char *names[] = {
1974                 "/proc/sys/net/ipv4/route/flush",
1975                 "/proc/sys/net/ipv6/route/flush"
1976         };
1977         int fd, i;
1978
1979         for (i = 0; i < ARRAY_SIZE(names); i++) {
1980                 fd = open(names[i], O_WRONLY);
1981                 if (fd < 0)
1982                         continue;
1983
1984                 if (write(fd, "-1", 2)) {}
1985                 close(fd);
1986         }
1987         return 0;
1988 }
1989
1990 bool system_resolve_rt_type(const char *type, unsigned int *id)
1991 {
1992         return system_rtn_aton(type, id);
1993 }
1994
1995 bool system_resolve_rt_proto(const char *type, unsigned int *id)
1996 {
1997         FILE *f;
1998         char *e, buf[128];
1999         unsigned int n, proto = 256;
2000         n = strtoul(type, &e, 0);
2001         if (!*e && e != type)
2002                 proto = n;
2003         else if (!strcmp(type, "unspec"))
2004                 proto = RTPROT_UNSPEC;
2005         else if (!strcmp(type, "kernel"))
2006                 proto = RTPROT_KERNEL;
2007         else if (!strcmp(type, "boot"))
2008                 proto = RTPROT_BOOT;
2009         else if (!strcmp(type, "static"))
2010                 proto = RTPROT_STATIC;
2011         else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2012                 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2013                         if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2014                                 continue;
2015
2016                         n = strtoul(e, NULL, 10);
2017                         e = strtok(NULL, " \t\n");
2018
2019                         if (e && !strcmp(e, type)) {
2020                                 proto = n;
2021                                 break;
2022                         }
2023                 }
2024                 fclose(f);
2025         }
2026
2027         if (proto > 255)
2028                 return false;
2029
2030         *id = proto;
2031         return true;
2032 }
2033
2034 bool system_resolve_rt_table(const char *name, unsigned int *id)
2035 {
2036         FILE *f;
2037         char *e, buf[128];
2038         unsigned int n, table = RT_TABLE_UNSPEC;
2039
2040         /* first try to parse table as number */
2041         if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2042                 table = n;
2043
2044         /* handle well known aliases */
2045         else if (!strcmp(name, "default"))
2046                 table = RT_TABLE_DEFAULT;
2047         else if (!strcmp(name, "main"))
2048                 table = RT_TABLE_MAIN;
2049         else if (!strcmp(name, "local"))
2050                 table = RT_TABLE_LOCAL;
2051
2052         /* try to look up name in /etc/iproute2/rt_tables */
2053         else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2054         {
2055                 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2056                 {
2057                         if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2058                                 continue;
2059
2060                         n = strtoul(e, NULL, 10);
2061                         e = strtok(NULL, " \t\n");
2062
2063                         if (e && !strcmp(e, name))
2064                         {
2065                                 table = n;
2066                                 break;
2067                         }
2068                 }
2069
2070                 fclose(f);
2071         }
2072
2073         if (table == RT_TABLE_UNSPEC)
2074                 return false;
2075
2076         *id = table;
2077         return true;
2078 }
2079
2080 bool system_is_default_rt_table(unsigned int id)
2081 {
2082         return (id == RT_TABLE_MAIN);
2083 }
2084
2085 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2086 {
2087         char *e;
2088         unsigned int n;
2089
2090         if (!strcmp(filter, "strict"))
2091                 n = 1;
2092         else if (!strcmp(filter, "loose"))
2093                 n = 2;
2094         else {
2095                 n = strtoul(filter, &e, 0);
2096                 if (*e || e == filter || n > 2)
2097                         return false;
2098         }
2099
2100         *id = n;
2101         return true;
2102 }
2103
2104 static int system_iprule(struct iprule *rule, int cmd)
2105 {
2106         int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2107
2108         struct nl_msg *msg;
2109         struct rtmsg rtm = {
2110                 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2111                 .rtm_protocol = RTPROT_STATIC,
2112                 .rtm_scope = RT_SCOPE_UNIVERSE,
2113                 .rtm_table = RT_TABLE_UNSPEC,
2114                 .rtm_type = RTN_UNSPEC,
2115                 .rtm_flags = 0,
2116         };
2117
2118         if (cmd == RTM_NEWRULE)
2119                 rtm.rtm_type = RTN_UNICAST;
2120
2121         if (rule->invert)
2122                 rtm.rtm_flags |= FIB_RULE_INVERT;
2123
2124         if (rule->flags & IPRULE_SRC)
2125                 rtm.rtm_src_len = rule->src_mask;
2126
2127         if (rule->flags & IPRULE_DEST)
2128                 rtm.rtm_dst_len = rule->dest_mask;
2129
2130         if (rule->flags & IPRULE_TOS)
2131                 rtm.rtm_tos = rule->tos;
2132
2133         if (rule->flags & IPRULE_LOOKUP) {
2134                 if (rule->lookup < 256)
2135                         rtm.rtm_table = rule->lookup;
2136         }
2137
2138         if (rule->flags & IPRULE_ACTION)
2139                 rtm.rtm_type = rule->action;
2140         else if (rule->flags & IPRULE_GOTO)
2141                 rtm.rtm_type = FR_ACT_GOTO;
2142         else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2143                 rtm.rtm_type = FR_ACT_NOP;
2144
2145         msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2146
2147         if (!msg)
2148                 return -1;
2149
2150         nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2151
2152         if (rule->flags & IPRULE_IN)
2153                 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2154
2155         if (rule->flags & IPRULE_OUT)
2156                 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2157
2158         if (rule->flags & IPRULE_SRC)
2159                 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2160
2161         if (rule->flags & IPRULE_DEST)
2162                 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2163
2164         if (rule->flags & IPRULE_PRIORITY)
2165                 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2166         else if (cmd == RTM_NEWRULE)
2167                 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2168
2169         if (rule->flags & IPRULE_FWMARK)
2170                 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2171
2172         if (rule->flags & IPRULE_FWMASK)
2173                 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2174
2175         if (rule->flags & IPRULE_LOOKUP) {
2176                 if (rule->lookup >= 256)
2177                         nla_put_u32(msg, FRA_TABLE, rule->lookup);
2178         }
2179
2180         if (rule->flags & IPRULE_SUP_PREFIXLEN)
2181                 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2182
2183         if (rule->flags & IPRULE_GOTO)
2184                 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2185
2186         return system_rtnl_call(msg);
2187 }
2188
2189 int system_add_iprule(struct iprule *rule)
2190 {
2191         return system_iprule(rule, RTM_NEWRULE);
2192 }
2193
2194 int system_del_iprule(struct iprule *rule)
2195 {
2196         return system_iprule(rule, RTM_DELRULE);
2197 }
2198
2199 int system_flush_iprules(void)
2200 {
2201         int rv = 0;
2202         struct iprule rule;
2203
2204         system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2205         system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2206
2207         memset(&rule, 0, sizeof(rule));
2208
2209
2210         rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2211
2212         rule.priority = 0;
2213         rule.lookup = RT_TABLE_LOCAL;
2214         rv |= system_iprule(&rule, RTM_NEWRULE);
2215
2216         rule.priority = 32766;
2217         rule.lookup = RT_TABLE_MAIN;
2218         rv |= system_iprule(&rule, RTM_NEWRULE);
2219
2220         rule.priority = 32767;
2221         rule.lookup = RT_TABLE_DEFAULT;
2222         rv |= system_iprule(&rule, RTM_NEWRULE);
2223
2224
2225         rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2226
2227         rule.priority = 0;
2228         rule.lookup = RT_TABLE_LOCAL;
2229         rv |= system_iprule(&rule, RTM_NEWRULE);
2230
2231         rule.priority = 32766;
2232         rule.lookup = RT_TABLE_MAIN;
2233         rv |= system_iprule(&rule, RTM_NEWRULE);
2234
2235         return rv;
2236 }
2237
2238 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2239 {
2240         return system_rtn_aton(action, id);
2241 }
2242
2243 time_t system_get_rtime(void)
2244 {
2245         struct timespec ts;
2246         struct timeval tv;
2247
2248         if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2249                 return ts.tv_sec;
2250
2251         if (gettimeofday(&tv, NULL) == 0)
2252                 return tv.tv_sec;
2253
2254         return 0;
2255 }
2256
2257 #ifndef IP_DF
2258 #define IP_DF       0x4000
2259 #endif
2260
2261 static int tunnel_ioctl(const char *name, int cmd, void *p)
2262 {
2263         struct ifreq ifr;
2264
2265         memset(&ifr, 0, sizeof(ifr));
2266         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
2267         ifr.ifr_ifru.ifru_data = p;
2268         return ioctl(sock_ioctl, cmd, &ifr);
2269 }
2270
2271 #ifdef IFLA_IPTUN_MAX
2272 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2273                                  struct blob_attr **tb)
2274 {
2275         struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2276                                 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2277         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2278         struct blob_attr *cur;
2279         int ret = 0, ttl = 0;
2280
2281         if (!nlm)
2282                 return -1;
2283
2284         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2285         nla_put_string(nlm, IFLA_IFNAME, name);
2286
2287         if (link)
2288                 nla_put_u32(nlm, IFLA_LINK, link);
2289
2290         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2291         if (!linkinfo) {
2292                 ret = -ENOMEM;
2293                 goto failure;
2294         }
2295
2296         nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2297         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2298         if (!infodata) {
2299                 ret = -ENOMEM;
2300                 goto failure;
2301         }
2302
2303         if (link)
2304                 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2305
2306         if ((cur = tb[TUNNEL_ATTR_TTL]))
2307                 ttl = blobmsg_get_u32(cur);
2308
2309         nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2310         nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2311         nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, 4);
2312
2313         struct in6_addr in6buf;
2314         if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2315                 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2316                         ret = -EINVAL;
2317                         goto failure;
2318                 }
2319                 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2320         }
2321
2322         if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2323                 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2324                         ret = -EINVAL;
2325                         goto failure;
2326                 }
2327                 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2328         }
2329
2330 #ifdef IFLA_IPTUN_FMR_MAX
2331         if ((cur = tb[TUNNEL_ATTR_FMRS])) {
2332                 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2333
2334                 struct blob_attr *fmr;
2335                 unsigned rem, fmrcnt = 0;
2336                 blobmsg_for_each_attr(fmr, cur, rem) {
2337                         if (blobmsg_type(fmr) != BLOBMSG_TYPE_STRING)
2338                                 continue;
2339
2340                         unsigned ip4len, ip6len, ealen, offset = 6;
2341                         char ip6buf[48];
2342                         char ip4buf[16];
2343
2344                         if (sscanf(blobmsg_get_string(fmr), "%47[^/]/%u,%15[^/]/%u,%u,%u",
2345                                         ip6buf, &ip6len, ip4buf, &ip4len, &ealen, &offset) < 5) {
2346                                 ret = -EINVAL;
2347                                 goto failure;
2348                         }
2349
2350                         struct in6_addr ip6prefix;
2351                         struct in_addr ip4prefix;
2352                         if (inet_pton(AF_INET6, ip6buf, &ip6prefix) != 1 ||
2353                                         inet_pton(AF_INET, ip4buf, &ip4prefix) != 1) {
2354                                 ret = -EINVAL;
2355                                 goto failure;
2356                         }
2357
2358                         struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2359
2360                         nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2361                         nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2362                         nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2363                         nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2364                         nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2365                         nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2366
2367                         nla_nest_end(nlm, rule);
2368                 }
2369
2370                 nla_nest_end(nlm, fmrs);
2371         }
2372 #endif
2373
2374         nla_nest_end(nlm, infodata);
2375         nla_nest_end(nlm, linkinfo);
2376
2377         return system_rtnl_call(nlm);
2378
2379 failure:
2380         nlmsg_free(nlm);
2381         return ret;
2382 }
2383 #endif
2384
2385 #ifdef IFLA_IPTUN_MAX
2386 #define IP6_FLOWINFO_TCLASS     htonl(0x0FF00000)
2387 static int system_add_gre_tunnel(const char *name, const char *kind,
2388                                  const unsigned int link, struct blob_attr **tb, bool v6)
2389 {
2390         struct nl_msg *nlm;
2391         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2392         struct blob_attr *cur;
2393         uint32_t ikey = 0, okey = 0, flags = 0, flowinfo = 0;
2394         uint16_t iflags = 0, oflags = 0;
2395         uint8_t tos = 0;
2396         int ret = 0, ttl = 0;
2397
2398         nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2399         if (!nlm)
2400                 return -1;
2401
2402         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2403         nla_put_string(nlm, IFLA_IFNAME, name);
2404
2405         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2406         if (!linkinfo) {
2407                 ret = -ENOMEM;
2408                 goto failure;
2409         }
2410
2411         nla_put_string(nlm, IFLA_INFO_KIND, kind);
2412         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2413         if (!infodata) {
2414                 ret = -ENOMEM;
2415                 goto failure;
2416         }
2417
2418         if (link)
2419                 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2420
2421         if ((cur = tb[TUNNEL_ATTR_TTL]))
2422                 ttl = blobmsg_get_u32(cur);
2423
2424         if ((cur = tb[TUNNEL_ATTR_TOS])) {
2425                 char *str = blobmsg_get_string(cur);
2426                 if (strcmp(str, "inherit")) {
2427                         unsigned uval;
2428
2429                         if (!system_tos_aton(str, &uval)) {
2430                                 ret = -EINVAL;
2431                                 goto failure;
2432                         }
2433
2434                         if (v6)
2435                                 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2436                         else
2437                                 tos = uval;
2438                 } else {
2439                         if (v6)
2440                                 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
2441                         else
2442                                 tos = 1;
2443                 }
2444         }
2445
2446         if ((cur = tb[TUNNEL_ATTR_DATA])) {
2447                 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
2448
2449                 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
2450                         blobmsg_data(cur), blobmsg_len(cur));
2451
2452                 if ((cur = tb_data[GRE_DATA_IKEY])) {
2453                         if ((ikey = blobmsg_get_u32(cur)))
2454                                 iflags |= GRE_KEY;
2455                 }
2456
2457                 if ((cur = tb_data[GRE_DATA_OKEY])) {
2458                         if ((okey = blobmsg_get_u32(cur)))
2459                                 oflags |= GRE_KEY;
2460                 }
2461
2462                 if ((cur = tb_data[GRE_DATA_ICSUM])) {
2463                         if (blobmsg_get_bool(cur))
2464                                 iflags |= GRE_CSUM;
2465                 }
2466
2467                 if ((cur = tb_data[GRE_DATA_OCSUM])) {
2468                         if (blobmsg_get_bool(cur))
2469                                 oflags |= GRE_CSUM;
2470                 }
2471
2472                 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
2473                         if (blobmsg_get_bool(cur))
2474                                 iflags |= GRE_SEQ;
2475                 }
2476
2477                 if ((cur = tb[GRE_DATA_OSEQNO])) {
2478                         if (blobmsg_get_bool(cur))
2479                                 oflags |= GRE_SEQ;
2480                 }
2481         }
2482
2483         if (v6) {
2484                 struct in6_addr in6buf;
2485                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2486                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2487                                 ret = -EINVAL;
2488                                 goto failure;
2489                         }
2490                         nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2491                 }
2492
2493                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2494                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2495                                 ret = -EINVAL;
2496                                 goto failure;
2497                         }
2498                         nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2499                 }
2500                 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, 4);
2501
2502                 if (flowinfo)
2503                         nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2504
2505                 if (flags)
2506                         nla_put_u32(nlm, IFLA_GRE_FLAGS, flags);
2507
2508                 if (!ttl)
2509                         ttl = 64;
2510         } else {
2511                 struct in_addr inbuf;
2512                 bool set_df = true;
2513
2514                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2515                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2516                                 ret = -EINVAL;
2517                                 goto failure;
2518                         }
2519                         nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2520                 }
2521
2522                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2523                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2524                                 ret = -EINVAL;
2525                                 goto failure;
2526                         }
2527                         nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2528
2529                         if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2530                                 if (!okey) {
2531                                         okey = inbuf.s_addr;
2532                                         oflags |= GRE_KEY;
2533                                 }
2534
2535                                 if (!ikey) {
2536                                         ikey = inbuf.s_addr;
2537                                         iflags |= GRE_KEY;
2538                                 }
2539                         }
2540                 }
2541
2542                 if ((cur = tb[TUNNEL_ATTR_DF]))
2543                         set_df = blobmsg_get_bool(cur);
2544
2545                 if (!set_df) {
2546                         /* ttl != 0 and nopmtudisc are incompatible */
2547                         if (ttl) {
2548                                 ret = -EINVAL;
2549                                 goto failure;
2550                         }
2551                 } else if (!ttl)
2552                         ttl = 64;
2553
2554                 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2555
2556                 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2557         }
2558
2559         if (ttl)
2560                 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2561
2562         if (oflags)
2563                 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2564
2565         if (iflags)
2566                 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2567
2568         if (okey)
2569                 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
2570
2571         if (ikey)
2572                 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
2573
2574         nla_nest_end(nlm, infodata);
2575         nla_nest_end(nlm, linkinfo);
2576
2577         return system_rtnl_call(nlm);
2578
2579 failure:
2580         nlmsg_free(nlm);
2581         return ret;
2582 }
2583 #endif
2584
2585 #ifdef IFLA_VTI_MAX
2586 static int system_add_vti_tunnel(const char *name, const char *kind,
2587                                  const unsigned int link, struct blob_attr **tb, bool v6)
2588 {
2589         struct nl_msg *nlm;
2590         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2591         struct blob_attr *cur;
2592         int ret = 0;
2593
2594         nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2595         if (!nlm)
2596                 return -1;
2597
2598         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2599         nla_put_string(nlm, IFLA_IFNAME, name);
2600
2601         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2602         if (!linkinfo) {
2603                 ret = -ENOMEM;
2604                 goto failure;
2605         }
2606
2607         nla_put_string(nlm, IFLA_INFO_KIND, kind);
2608         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2609         if (!infodata) {
2610                 ret = -ENOMEM;
2611                 goto failure;
2612         }
2613
2614         if (link)
2615                 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2616
2617         if (v6) {
2618                 struct in6_addr in6buf;
2619                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2620                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2621                                 ret = -EINVAL;
2622                                 goto failure;
2623                         }
2624                         nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2625                 }
2626
2627                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2628                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2629                                 ret = -EINVAL;
2630                                 goto failure;
2631                         }
2632                         nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2633                 }
2634
2635         } else {
2636                 struct in_addr inbuf;
2637
2638                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2639                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2640                                 ret = -EINVAL;
2641                                 goto failure;
2642                         }
2643                         nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2644                 }
2645
2646                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2647                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2648                                 ret = -EINVAL;
2649                                 goto failure;
2650                         }
2651                         nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2652                 }
2653
2654         }
2655
2656         if ((cur = tb[TUNNEL_ATTR_DATA])) {
2657                 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
2658                 uint32_t ikey = 0, okey = 0;
2659
2660                 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
2661                         blobmsg_data(cur), blobmsg_len(cur));
2662
2663                 if ((cur = tb_data[VTI_DATA_IKEY])) {
2664                         if ((ikey = blobmsg_get_u32(cur)))
2665                                 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2666                 }
2667
2668                 if ((cur = tb_data[VTI_DATA_OKEY])) {
2669                         if ((okey = blobmsg_get_u32(cur)))
2670                                 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2671                 }
2672         }
2673
2674         nla_nest_end(nlm, infodata);
2675         nla_nest_end(nlm, linkinfo);
2676
2677         return system_rtnl_call(nlm);
2678
2679 failure:
2680         nlmsg_free(nlm);
2681         return ret;
2682 }
2683 #endif
2684
2685 #ifdef IFLA_VXLAN_MAX
2686 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
2687 {
2688         struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
2689         struct nl_msg *msg;
2690         struct nlattr *linkinfo, *data;
2691         struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
2692         struct blob_attr *cur;
2693         int ret = 0;
2694
2695         if ((cur = tb[TUNNEL_ATTR_DATA]))
2696                 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
2697                         blobmsg_data(cur), blobmsg_len(cur));
2698         else
2699                 return -EINVAL;
2700
2701         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
2702
2703         if (!msg)
2704                 return -1;
2705
2706         nlmsg_append(msg, &iim, sizeof(iim), 0);
2707
2708         nla_put_string(msg, IFLA_IFNAME, name);
2709
2710         if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
2711                 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
2712                 if (!ea) {
2713                         ret = -EINVAL;
2714                         goto failure;
2715                 }
2716
2717                 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
2718         }
2719
2720         if ((cur = tb[TUNNEL_ATTR_MTU])) {
2721                 uint32_t mtu = blobmsg_get_u32(cur);
2722                 nla_put_u32(msg, IFLA_MTU, mtu);
2723         }
2724
2725         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
2726                 ret = -ENOMEM;
2727                 goto failure;
2728         }
2729
2730         nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
2731
2732         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
2733                 ret = -ENOMEM;
2734                 goto failure;
2735         }
2736
2737         if (link)
2738                 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
2739
2740         if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
2741                 uint32_t id = blobmsg_get_u32(cur);
2742                 if (id >= (1u << 24) - 1) {
2743                         ret = -EINVAL;
2744                         goto failure;
2745                 }
2746
2747                 nla_put_u32(msg, IFLA_VXLAN_ID, id);
2748         }
2749
2750         if (v6) {
2751                 struct in6_addr in6buf;
2752                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2753                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2754                                 ret = -EINVAL;
2755                                 goto failure;
2756                         }
2757                         nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
2758                 }
2759
2760                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2761                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2762                                 ret = -EINVAL;
2763                                 goto failure;
2764                         }
2765                         nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
2766                 }
2767         } else {
2768                 struct in_addr inbuf;
2769
2770                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2771                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2772                                 ret = -EINVAL;
2773                                 goto failure;
2774                         }
2775                         nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
2776                 }
2777
2778                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2779                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2780                                 ret = -EINVAL;
2781                                 goto failure;
2782                         }
2783                         nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
2784                 }
2785         }
2786
2787         uint32_t port = 4789;
2788         if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
2789                 port = blobmsg_get_u32(cur);
2790                 if (port < 1 || port > 65535) {
2791                         ret = -EINVAL;
2792                         goto failure;
2793                 }
2794         }
2795         nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
2796
2797         if ((cur = tb[TUNNEL_ATTR_TOS])) {
2798                 char *str = blobmsg_get_string(cur);
2799                 unsigned tos = 1;
2800
2801                 if (strcmp(str, "inherit")) {
2802                         if (!system_tos_aton(str, &tos))
2803                                 return -EINVAL;
2804                 }
2805
2806                 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
2807         }
2808
2809         if ((cur = tb[TUNNEL_ATTR_TTL])) {
2810                 uint32_t ttl = blobmsg_get_u32(cur);
2811                 if (ttl < 1 || ttl > 255) {
2812                         ret = -EINVAL;
2813                         goto failure;
2814                 }
2815
2816                 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
2817         }
2818
2819         nla_nest_end(msg, data);
2820         nla_nest_end(msg, linkinfo);
2821
2822         ret = system_rtnl_call(msg);
2823         if (ret)
2824                 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
2825
2826         return ret;
2827
2828 failure:
2829         nlmsg_free(msg);
2830         return ret;
2831 }
2832 #endif
2833
2834 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
2835 {
2836         struct blob_attr *cur;
2837         int ret = 0;
2838
2839         if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
2840                 return -1;
2841
2842 #ifdef SIOCADD6RD
2843         if ((cur = tb[TUNNEL_ATTR_DATA])) {
2844                 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
2845                 unsigned int mask;
2846                 struct ip_tunnel_6rd p6;
2847
2848                 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
2849                         blobmsg_data(cur), blobmsg_len(cur));
2850
2851                 memset(&p6, 0, sizeof(p6));
2852
2853                 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
2854                         if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
2855                                                 &p6.prefix, &mask) || mask > 128) {
2856                                 ret = -EINVAL;
2857                                 goto failure;
2858                         }
2859
2860                         p6.prefixlen = mask;
2861                 }
2862
2863                 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
2864                         if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
2865                                                 &p6.relay_prefix, &mask) || mask > 32) {
2866                                 ret = -EINVAL;
2867                                 goto failure;
2868                         }
2869
2870                         p6.relay_prefixlen = mask;
2871                 }
2872
2873                 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
2874                         ret = -1;
2875                         goto failure;
2876                 }
2877         }
2878 #endif
2879
2880         return ret;
2881
2882 failure:
2883         __system_del_ip_tunnel(name, tb);
2884         return ret;
2885 }
2886
2887 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
2888 {
2889         struct blob_attr *cur;
2890         bool set_df = true;
2891         struct ip_tunnel_parm p  = {
2892                 .link = link,
2893                 .iph = {
2894                         .version = 4,
2895                         .ihl = 5,
2896                         .protocol = proto,
2897                 }
2898         };
2899
2900         if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
2901                         inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
2902                 return -EINVAL;
2903
2904         if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
2905                         inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
2906                 return -EINVAL;
2907
2908         if ((cur = tb[TUNNEL_ATTR_DF]))
2909                 set_df = blobmsg_get_bool(cur);
2910
2911         if ((cur = tb[TUNNEL_ATTR_TTL]))
2912                 p.iph.ttl = blobmsg_get_u32(cur);
2913
2914         if ((cur = tb[TUNNEL_ATTR_TOS])) {
2915                 char *str = blobmsg_get_string(cur);
2916                 if (strcmp(str, "inherit")) {
2917                         unsigned uval;
2918
2919                         if (!system_tos_aton(str, &uval))
2920                                 return -EINVAL;
2921
2922                         p.iph.tos = uval;
2923                 } else
2924                         p.iph.tos = 1;
2925         }
2926
2927         p.iph.frag_off = set_df ? htons(IP_DF) : 0;
2928         /* ttl !=0 and nopmtudisc are incompatible */
2929         if (p.iph.ttl && p.iph.frag_off == 0)
2930                 return -EINVAL;
2931
2932         strncpy(p.name, name, sizeof(p.name));
2933
2934         switch (p.iph.protocol) {
2935         case IPPROTO_IPIP:
2936                 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
2937         case IPPROTO_IPV6:
2938                 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
2939         default:
2940                 break;
2941         }
2942         return -1;
2943 }
2944
2945 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
2946 {
2947         struct blob_attr *cur;
2948         const char *str;
2949
2950         if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2951                 return -EINVAL;
2952         str = blobmsg_data(cur);
2953
2954         if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
2955             !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
2956             !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
2957             !strcmp(str, "vxlan") || !strcmp(str, "vxlan6"))
2958                 return system_link_del(name);
2959         else
2960                 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
2961 }
2962
2963 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
2964 {
2965         struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2966
2967         blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2968                 blob_data(attr), blob_len(attr));
2969
2970         return __system_del_ip_tunnel(name, tb);
2971 }
2972
2973 int system_update_ipv6_mtu(struct device *dev, int mtu)
2974 {
2975         int ret = -1;
2976         char buf[64];
2977         int fd;
2978
2979         snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
2980                         dev->ifname);
2981
2982         fd = open(buf, O_RDWR);
2983         if (fd < 0)
2984                 return ret;
2985
2986         if (!mtu) {
2987                 ssize_t len = read(fd, buf, sizeof(buf) - 1);
2988                 if (len < 0)
2989                         goto out;
2990
2991                 buf[len] = 0;
2992                 ret = atoi(buf);
2993         } else {
2994                 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
2995                         ret = mtu;
2996         }
2997
2998 out:
2999         close(fd);
3000         return ret;
3001 }
3002
3003 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3004 {
3005         struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3006         struct blob_attr *cur;
3007         const char *str;
3008
3009         blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3010                 blob_data(attr), blob_len(attr));
3011
3012         __system_del_ip_tunnel(name, tb);
3013
3014         if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3015                 return -EINVAL;
3016         str = blobmsg_data(cur);
3017
3018         unsigned int ttl = 0;
3019         if ((cur = tb[TUNNEL_ATTR_TTL])) {
3020                 ttl = blobmsg_get_u32(cur);
3021                 if (ttl > 255)
3022                         return -EINVAL;
3023         }
3024
3025         unsigned int link = 0;
3026         if ((cur = tb[TUNNEL_ATTR_LINK])) {
3027                 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3028                 if (!iface)
3029                         return -EINVAL;
3030
3031                 if (iface->l3_dev.dev)
3032                         link = iface->l3_dev.dev->ifindex;
3033         }
3034
3035         if (!strcmp(str, "sit"))
3036                 return system_add_sit_tunnel(name, link, tb);
3037 #ifdef IFLA_IPTUN_MAX
3038         else if (!strcmp(str, "ipip6")) {
3039                 return system_add_ip6_tunnel(name, link, tb);
3040         } else if (!strcmp(str, "greip")) {
3041                 return system_add_gre_tunnel(name, "gre", link, tb, false);
3042         } else if (!strcmp(str, "gretapip"))  {
3043                 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3044         } else if (!strcmp(str, "greip6")) {
3045                 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3046         } else if (!strcmp(str, "gretapip6")) {
3047                 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3048 #ifdef IFLA_VTI_MAX
3049         } else if (!strcmp(str, "vtiip")) {
3050                 return system_add_vti_tunnel(name, "vti", link, tb, false);
3051         } else if (!strcmp(str, "vtiip6")) {
3052                 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3053 #endif
3054 #ifdef IFLA_VXLAN_MAX
3055         } else if(!strcmp(str, "vxlan")) {
3056                 return system_add_vxlan(name, link, tb, false);
3057         } else if(!strcmp(str, "vxlan6")) {
3058                 return system_add_vxlan(name, link, tb, true);
3059 #endif
3060 #endif
3061         } else if (!strcmp(str, "ipip")) {
3062                 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3063         }
3064         else
3065                 return -EINVAL;
3066
3067         return 0;
3068 }