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  * Copyright (C) 2018 Hans Dedecker <dedeckeh@gmail.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2
  12  * as published by the Free Software Foundation
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  */
  19 #define _GNU_SOURCE
  20
  21 #include <sys/socket.h>
  22 #include <sys/ioctl.h>
  23 #include <sys/stat.h>
  24 #include <sys/syscall.h>
  25
  26 #include <net/if.h>
  27 #include <net/if_arp.h>
  28
  29 #include <arpa/inet.h>
  30 #include <netinet/ether.h>
  31 #include <netinet/in.h>
  32
  33 #include <linux/rtnetlink.h>
  34 #include <linux/neighbour.h>
  35 #include <linux/sockios.h>
  36 #include <linux/ip.h>
  37 #include <linux/if_addr.h>
  38 #include <linux/if_link.h>
  39 #include <linux/if_vlan.h>
  40 #include <linux/if_bridge.h>
  41 #include <linux/if_tunnel.h>
  42 #include <linux/ip6_tunnel.h>
  43 #include <linux/ethtool.h>
  44 #include <linux/fib_rules.h>
  45 #include <linux/veth.h>
  46 #include <linux/version.h>
  47
  48 #ifndef RTN_FAILED_POLICY
  49 #define RTN_FAILED_POLICY 12
  50 #endif
  51
  52 #ifndef IFA_F_NOPREFIXROUTE
  53 #define IFA_F_NOPREFIXROUTE 0x200
  54 #endif
  55
  56 #ifndef IFA_FLAGS
  57 #define IFA_FLAGS (IFA_MULTICAST + 1)
  58 #endif
  59
  60 #include <string.h>
  61 #include <fcntl.h>
  62 #include <glob.h>
  63 #include <time.h>
  64 #include <unistd.h>
  65
  66 #include <netlink/msg.h>
  67 #include <netlink/attr.h>
  68 #include <netlink/socket.h>
  69 #include <libubox/uloop.h>
  70
  71 #include "netifd.h"
  72 #include "device.h"
  73 #include "system.h"
  74
  75 struct event_socket {
  76         struct uloop_fd uloop;
  77         struct nl_sock *sock;
  78         int bufsize;
  79 };
  80
  81 static int sock_ioctl = -1;
  82 static struct nl_sock *sock_rtnl = NULL;
  83
  84 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
  85 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
  86 static int system_add_proto_tunnel(const char *name, const uint8_t proto,
  87                                         const unsigned int link, struct blob_attr **tb);
  88 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb);
  89
  90 static char dev_buf[256];
  91
  92 static void
  93 handler_nl_event(struct uloop_fd *u, unsigned int events)
  94 {
  95         struct event_socket *ev = container_of(u, struct event_socket, uloop);
  96         int err;
  97         socklen_t errlen = sizeof(err);
  98
  99         if (!u->error) {
 100                 nl_recvmsgs_default(ev->sock);
 101                 return;
 102         }
 103
 104         if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
 105                 goto abort;
 106
 107         switch(err) {
 108         case ENOBUFS:
 109                 /* Increase rx buffer size on netlink socket */
 110                 ev->bufsize *= 2;
 111                 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
 112                         goto abort;
 113
 114                 /* Request full dump since some info got dropped */
 115                 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
 116                 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
 117                 break;
 118
 119         default:
 120                 goto abort;
 121         }
 122         u->error = false;
 123         return;
 124
 125 abort:
 126         uloop_fd_delete(&ev->uloop);
 127         return;
 128 }
 129
 130 static struct nl_sock *
 131 create_socket(int protocol, int groups)
 132 {
 133         struct nl_sock *sock;
 134
 135         sock = nl_socket_alloc();
 136         if (!sock)
 137                 return NULL;
 138
 139         if (groups)
 140                 nl_join_groups(sock, groups);
 141
 142         if (nl_connect(sock, protocol)) {
 143                 nl_socket_free(sock);
 144                 return NULL;
 145         }
 146
 147         return sock;
 148 }
 149
 150 static bool
 151 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
 152                         uloop_fd_handler cb, int flags)
 153 {
 154         ev->sock = create_socket(protocol, groups);
 155         if (!ev->sock)
 156                 return false;
 157
 158         ev->uloop.fd = nl_socket_get_fd(ev->sock);
 159         ev->uloop.cb = cb;
 160         if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
 161                 return false;
 162
 163         return true;
 164 }
 165
 166 static bool
 167 create_event_socket(struct event_socket *ev, int protocol,
 168                     int (*cb)(struct nl_msg *msg, void *arg))
 169 {
 170         if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
 171                 return false;
 172
 173         /* Install the valid custom callback handler */
 174         nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
 175
 176         /* Disable sequence number checking on event sockets */
 177         nl_socket_disable_seq_check(ev->sock);
 178
 179         /* Increase rx buffer size to 65K on event sockets */
 180         ev->bufsize = 65535;
 181         if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
 182                 return false;
 183
 184         return true;
 185 }
 186
 187 static bool
 188 create_hotplug_event_socket(struct event_socket *ev, int protocol,
 189                             void (*cb)(struct uloop_fd *u, unsigned int events))
 190 {
 191         if (!create_raw_event_socket(ev, protocol, 1, cb, ULOOP_ERROR_CB))
 192                 return false;
 193
 194         /* Increase rx buffer size to 65K on event sockets */
 195         ev->bufsize = 65535;
 196         if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
 197                 return false;
 198
 199         return true;
 200 }
 201
 202 static bool
 203 system_rtn_aton(const char *src, unsigned int *dst)
 204 {
 205         char *e;
 206         unsigned int n;
 207
 208         if (!strcmp(src, "local"))
 209                 n = RTN_LOCAL;
 210         else if (!strcmp(src, "nat"))
 211                 n = RTN_NAT;
 212         else if (!strcmp(src, "broadcast"))
 213                 n = RTN_BROADCAST;
 214         else if (!strcmp(src, "anycast"))
 215                 n = RTN_ANYCAST;
 216         else if (!strcmp(src, "multicast"))
 217                 n = RTN_MULTICAST;
 218         else if (!strcmp(src, "prohibit"))
 219                 n = RTN_PROHIBIT;
 220         else if (!strcmp(src, "unreachable"))
 221                 n = RTN_UNREACHABLE;
 222         else if (!strcmp(src, "blackhole"))
 223                 n = RTN_BLACKHOLE;
 224         else if (!strcmp(src, "xresolve"))
 225                 n = RTN_XRESOLVE;
 226         else if (!strcmp(src, "unicast"))
 227                 n = RTN_UNICAST;
 228         else if (!strcmp(src, "throw"))
 229                 n = RTN_THROW;
 230         else if (!strcmp(src, "failed_policy"))
 231                 n = RTN_FAILED_POLICY;
 232         else {
 233                 n = strtoul(src, &e, 0);
 234                 if (!e || *e || e == src || n > 255)
 235                         return false;
 236         }
 237
 238         *dst = n;
 239         return true;
 240 }
 241
 242 static bool
 243 system_tos_aton(const char *src, unsigned *dst)
 244 {
 245         char *e;
 246
 247         *dst = strtoul(src, &e, 16);
 248         if (e == src || *e || *dst > 255)
 249                 return false;
 250
 251         return true;
 252 }
 253
 254 int system_init(void)
 255 {
 256         static struct event_socket rtnl_event;
 257         static struct event_socket hotplug_event;
 258
 259         sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
 260         system_fd_set_cloexec(sock_ioctl);
 261
 262         /* Prepare socket for routing / address control */
 263         sock_rtnl = create_socket(NETLINK_ROUTE, 0);
 264         if (!sock_rtnl)
 265                 return -1;
 266
 267         if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
 268                 return -1;
 269
 270         if (!create_hotplug_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT,
 271                                          handle_hotplug_event))
 272                 return -1;
 273
 274         /* Receive network link events form kernel */
 275         nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
 276
 277         return 0;
 278 }
 279
 280 static void system_set_sysctl(const char *path, const char *val)
 281 {
 282         int fd;
 283
 284         fd = open(path, O_WRONLY);
 285         if (fd < 0)
 286                 return;
 287
 288         if (write(fd, val, strlen(val))) {}
 289         close(fd);
 290 }
 291
 292 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
 293 {
 294         snprintf(dev_buf, sizeof(dev_buf), path, device);
 295         system_set_sysctl(dev_buf, val);
 296 }
 297
 298 static void system_set_disable_ipv6(struct device *dev, const char *val)
 299 {
 300         system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
 301 }
 302
 303 static void system_set_rpfilter(struct device *dev, const char *val)
 304 {
 305         system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
 306 }
 307
 308 static void system_set_acceptlocal(struct device *dev, const char *val)
 309 {
 310         system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
 311 }
 312
 313 static void system_set_igmpversion(struct device *dev, const char *val)
 314 {
 315         system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val);
 316 }
 317
 318 static void system_set_mldversion(struct device *dev, const char *val)
 319 {
 320         system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val);
 321 }
 322
 323 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
 324 {
 325         system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val);
 326 }
 327
 328 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
 329 {
 330         system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val);
 331 }
 332
 333 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
 334 {
 335         system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time", dev->ifname, val);
 336 }
 337
 338 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
 339 {
 340         system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time", dev->ifname, val);
 341 }
 342
 343 static void system_set_neigh4locktime(struct device *dev, const char *val)
 344 {
 345         system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime", dev->ifname, val);
 346 }
 347
 348 static void system_set_dadtransmits(struct device *dev, const char *val)
 349 {
 350         system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
 351 }
 352
 353 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
 354 {
 355         system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
 356 }
 357
 358 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
 359 {
 360         system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_fast_leave", dev->ifname, val);
 361 }
 362
 363 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
 364 {
 365         system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
 366 }
 367
 368 static void system_bridge_set_isolated(struct device *dev, const char *val)
 369 {
 370         system_set_dev_sysctl("/sys/class/net/%s/brport/isolated", dev->ifname, val);
 371 }
 372
 373 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
 374 {
 375         system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
 376                                        "/sys/class/net/%s/brport/multicast_router",
 377                               dev->ifname, val);
 378 }
 379
 380 static void system_bridge_set_robustness(struct device *dev, const char *val)
 381 {
 382         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
 383                               dev->ifname, val);
 384         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
 385                               dev->ifname, val);
 386 }
 387
 388 static void system_bridge_set_query_interval(struct device *dev, const char *val)
 389 {
 390         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
 391                               dev->ifname, val);
 392 }
 393
 394 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
 395 {
 396         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
 397                               dev->ifname, val);
 398 }
 399
 400 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
 401 {
 402         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
 403                               dev->ifname, val);
 404 }
 405
 406 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
 407 {
 408         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
 409                               dev->ifname, val);
 410 }
 411
 412 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
 413 {
 414         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
 415                               dev->ifname, val);
 416 }
 417
 418 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
 419 {
 420         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
 421                               dev->ifname, val);
 422 }
 423
 424 static void system_bridge_set_stp_state(struct device *dev, const char *val)
 425 {
 426         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/stp_state", dev->ifname, val);
 427 }
 428
 429 static void system_bridge_set_forward_delay(struct device *dev, const char *val)
 430 {
 431         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/forward_delay", dev->ifname, val);
 432 }
 433
 434 static void system_bridge_set_priority(struct device *dev, const char *val)
 435 {
 436         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/priority", dev->ifname, val);
 437 }
 438
 439 static void system_bridge_set_ageing_time(struct device *dev, const char *val)
 440 {
 441         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/ageing_time", dev->ifname, val);
 442 }
 443
 444 static void system_bridge_set_hello_time(struct device *dev, const char *val)
 445 {
 446         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hello_time", dev->ifname, val);
 447 }
 448
 449 static void system_bridge_set_max_age(struct device *dev, const char *val)
 450 {
 451         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/max_age", dev->ifname, val);
 452 }
 453
 454 static void system_bridge_set_learning(struct device *dev, const char *val)
 455 {
 456         system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val);
 457 }
 458
 459 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
 460 {
 461         system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val);
 462 }
 463
 464 static void system_set_sendredirects(struct device *dev, const char *val)
 465 {
 466         system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, val);
 467 }
 468
 469 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
 470 {
 471         int fd = -1, ret = -1;
 472
 473         fd = open(path, O_RDONLY);
 474         if (fd < 0)
 475                 goto out;
 476
 477         ssize_t len = read(fd, buf, buf_sz - 1);
 478         if (len < 0)
 479                 goto out;
 480
 481         ret = buf[len] = 0;
 482
 483 out:
 484         if (fd >= 0)
 485                 close(fd);
 486
 487         return ret;
 488 }
 489
 490 static int
 491 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
 492 {
 493         snprintf(dev_buf, sizeof(dev_buf), path, device);
 494         return system_get_sysctl(dev_buf, buf, buf_sz);
 495 }
 496
 497 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
 498 {
 499         return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
 500                         dev->ifname, buf, buf_sz);
 501 }
 502
 503 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
 504 {
 505         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
 506                         dev->ifname, buf, buf_sz);
 507 }
 508
 509 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
 510 {
 511         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
 512                         dev->ifname, buf, buf_sz);
 513 }
 514
 515 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
 516 {
 517         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
 518                         dev->ifname, buf, buf_sz);
 519 }
 520
 521 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
 522 {
 523         return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
 524                         dev->ifname, buf, buf_sz);
 525 }
 526
 527 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
 528 {
 529         return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
 530                         dev->ifname, buf, buf_sz);
 531 }
 532
 533 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
 534 {
 535         return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
 536                         dev->ifname, buf, buf_sz);
 537 }
 538
 539 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
 540 {
 541         return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time",
 542                         dev->ifname, buf, buf_sz);
 543 }
 544
 545 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
 546 {
 547         return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time",
 548                         dev->ifname, buf, buf_sz);
 549 }
 550
 551 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
 552 {
 553         return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime",
 554                         dev->ifname, buf, buf_sz);
 555 }
 556
 557 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
 558 {
 559         return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
 560                         dev->ifname, buf, buf_sz);
 561 }
 562
 563 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
 564 {
 565         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects",
 566                         dev->ifname, buf, buf_sz);
 567 }
 568
 569 /* Evaluate netlink messages */
 570 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
 571 {
 572         struct nlmsghdr *nh = nlmsg_hdr(msg);
 573         struct nlattr *nla[__IFLA_MAX];
 574         int link_state = 0;
 575         char buf[10];
 576
 577         if (nh->nlmsg_type != RTM_NEWLINK)
 578                 goto out;
 579
 580         nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
 581         if (!nla[IFLA_IFNAME])
 582                 goto out;
 583
 584         struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
 585         if (!dev)
 586                 goto out;
 587
 588         if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
 589                 link_state = strtoul(buf, NULL, 0);
 590
 591         device_set_link(dev, link_state ? true : false);
 592
 593 out:
 594         return 0;
 595 }
 596
 597 static void
 598 handle_hotplug_msg(char *data, int size)
 599 {
 600         const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
 601         char *cur, *end, *sep;
 602         struct device *dev;
 603         int skip;
 604         bool add, move = false;
 605
 606         if (!strncmp(data, "add@", 4))
 607                 add = true;
 608         else if (!strncmp(data, "remove@", 7))
 609                 add = false;
 610         else if (!strncmp(data, "move@", 5)) {
 611                 add = true;
 612                 move = true;
 613         }
 614         else
 615                 return;
 616
 617         skip = strlen(data) + 1;
 618         end = data + size;
 619
 620         for (cur = data + skip; cur < end; cur += skip) {
 621                 skip = strlen(cur) + 1;
 622
 623                 sep = strchr(cur, '=');
 624                 if (!sep)
 625                         continue;
 626
 627                 *sep = 0;
 628                 if (!strcmp(cur, "INTERFACE"))
 629                         interface = sep + 1;
 630                 else if (!strcmp(cur, "SUBSYSTEM")) {
 631                         subsystem = sep + 1;
 632                         if (strcmp(subsystem, "net") != 0)
 633                                 return;
 634                 } else if (!strcmp(cur, "DEVPATH_OLD")) {
 635                         interface_old = strrchr(sep + 1, '/');
 636                         if (interface_old)
 637                                 interface_old++;
 638                 }
 639         }
 640
 641         if (subsystem && interface) {
 642                 if (move && interface_old)
 643                         goto move;
 644                 else
 645                         goto found;
 646         }
 647
 648         return;
 649
 650 move:
 651         dev = device_find(interface_old);
 652         if (!dev)
 653                 goto found;
 654
 655         if (dev->type != &simple_device_type)
 656                 goto found;
 657
 658         device_set_present(dev, false);
 659
 660 found:
 661         dev = device_find(interface);
 662         if (!dev)
 663                 return;
 664
 665         if (dev->type != &simple_device_type)
 666                 return;
 667
 668         if (add && system_if_force_external(dev->ifname))
 669                 return;
 670
 671         device_set_present(dev, add);
 672 }
 673
 674 static void
 675 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
 676 {
 677         struct event_socket *ev = container_of(u, struct event_socket, uloop);
 678         struct sockaddr_nl nla;
 679         unsigned char *buf = NULL;
 680         int size;
 681         int err;
 682         socklen_t errlen = sizeof(err);
 683
 684         if (!u->error) {
 685                 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
 686                         if (nla.nl_pid == 0)
 687                                 handle_hotplug_msg((char *) buf, size);
 688
 689                         free(buf);
 690                 }
 691                 return;
 692         }
 693
 694         if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
 695                 goto abort;
 696
 697         switch(err) {
 698         case ENOBUFS:
 699                 /* Increase rx buffer size on netlink socket */
 700                 ev->bufsize *= 2;
 701                 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
 702                         goto abort;
 703                 break;
 704
 705         default:
 706                 goto abort;
 707         }
 708         u->error = false;
 709         return;
 710
 711 abort:
 712         uloop_fd_delete(&ev->uloop);
 713         return;
 714 }
 715
 716 static int system_rtnl_call(struct nl_msg *msg)
 717 {
 718         int ret;
 719
 720         ret = nl_send_auto_complete(sock_rtnl, msg);
 721         nlmsg_free(msg);
 722
 723         if (ret < 0)
 724                 return ret;
 725
 726         return nl_wait_for_ack(sock_rtnl);
 727 }
 728
 729 int system_bridge_delbr(struct device *bridge)
 730 {
 731         return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
 732 }
 733
 734 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
 735 {
 736         struct ifreq ifr;
 737
 738         memset(&ifr, 0, sizeof(ifr));
 739         if (dev)
 740                 ifr.ifr_ifindex = dev->ifindex;
 741         else
 742                 ifr.ifr_data = data;
 743         strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
 744         return ioctl(sock_ioctl, cmd, &ifr);
 745 }
 746
 747 static bool system_is_bridge(const char *name, char *buf, int buflen)
 748 {
 749         struct stat st;
 750
 751         snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
 752         if (stat(buf, &st) < 0)
 753                 return false;
 754
 755         return true;
 756 }
 757
 758 static char *system_get_bridge(const char *name, char *buf, int buflen)
 759 {
 760         char *path;
 761         ssize_t len = -1;
 762         glob_t gl;
 763
 764         snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
 765         if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
 766                 return NULL;
 767
 768         if (gl.gl_pathc > 0)
 769                 len = readlink(gl.gl_pathv[0], buf, buflen);
 770
 771         globfree(&gl);
 772
 773         if (len < 0)
 774                 return NULL;
 775
 776         buf[len] = 0;
 777         path = strrchr(buf, '/');
 778         if (!path)
 779                 return NULL;
 780
 781         return path + 1;
 782 }
 783
 784 static void
 785 system_bridge_set_wireless(struct device *bridge, struct device *dev)
 786 {
 787         bool mcast_to_ucast = dev->wireless_ap;
 788         bool hairpin = true;
 789
 790         if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
 791             !bridge->settings.multicast_to_unicast)
 792                 mcast_to_ucast = false;
 793
 794         if (!mcast_to_ucast || dev->wireless_isolate)
 795                 hairpin = false;
 796
 797         system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
 798         system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
 799 }
 800
 801 int system_bridge_addif(struct device *bridge, struct device *dev)
 802 {
 803         char buf[64];
 804         char *oldbr;
 805         int ret = 0;
 806
 807         oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
 808         if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
 809                 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
 810
 811         if (dev->wireless)
 812                 system_bridge_set_wireless(bridge, dev);
 813
 814         if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
 815                 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
 816                 system_bridge_set_multicast_router(dev, buf, false);
 817         }
 818
 819         if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
 820             dev->settings.multicast_fast_leave)
 821                 system_bridge_set_multicast_fast_leave(dev, "1");
 822
 823         if (dev->settings.flags & DEV_OPT_LEARNING &&
 824             !dev->settings.learning)
 825                 system_bridge_set_learning(dev, "0");
 826
 827         if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
 828             !dev->settings.unicast_flood)
 829                 system_bridge_set_unicast_flood(dev, "0");
 830
 831         if (dev->settings.flags & DEV_OPT_ISOLATE &&
 832             dev->settings.isolate)
 833                 system_bridge_set_isolated(dev, "1");
 834
 835         return ret;
 836 }
 837
 838 int system_bridge_delif(struct device *bridge, struct device *dev)
 839 {
 840         return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
 841 }
 842
 843 int system_if_resolve(struct device *dev)
 844 {
 845         struct ifreq ifr;
 846         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
 847         if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
 848                 return ifr.ifr_ifindex;
 849         else
 850                 return 0;
 851 }
 852
 853 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
 854 {
 855         struct ifreq ifr;
 856
 857         memset(&ifr, 0, sizeof(ifr));
 858         strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
 859         if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
 860                 return -1;
 861
 862         ifr.ifr_flags |= add;
 863         ifr.ifr_flags &= ~rem;
 864         return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
 865 }
 866
 867 struct clear_data {
 868         struct nl_msg *msg;
 869         struct device *dev;
 870         int type;
 871         int size;
 872         int af;
 873 };
 874
 875
 876 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
 877 {
 878         struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
 879
 880         return ifa->ifa_index == ifindex;
 881 }
 882
 883 static bool check_route(struct nlmsghdr *hdr, int ifindex)
 884 {
 885         struct rtmsg *r = NLMSG_DATA(hdr);
 886         struct nlattr *tb[__RTA_MAX];
 887
 888         if (r->rtm_protocol == RTPROT_KERNEL &&
 889             r->rtm_family == AF_INET6)
 890                 return false;
 891
 892         nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
 893         if (!tb[RTA_OIF])
 894                 return false;
 895
 896         return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
 897 }
 898
 899 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
 900 {
 901         return true;
 902 }
 903
 904 static int cb_clear_event(struct nl_msg *msg, void *arg)
 905 {
 906         struct clear_data *clr = arg;
 907         struct nlmsghdr *hdr = nlmsg_hdr(msg);
 908         bool (*cb)(struct nlmsghdr *, int ifindex);
 909         int type, ret;
 910
 911         switch(clr->type) {
 912         case RTM_GETADDR:
 913                 type = RTM_DELADDR;
 914                 if (hdr->nlmsg_type != RTM_NEWADDR)
 915                         return NL_SKIP;
 916
 917                 cb = check_ifaddr;
 918                 break;
 919         case RTM_GETROUTE:
 920                 type = RTM_DELROUTE;
 921                 if (hdr->nlmsg_type != RTM_NEWROUTE)
 922                         return NL_SKIP;
 923
 924                 cb = check_route;
 925                 break;
 926         case RTM_GETRULE:
 927                 type = RTM_DELRULE;
 928                 if (hdr->nlmsg_type != RTM_NEWRULE)
 929                         return NL_SKIP;
 930
 931                 cb = check_rule;
 932                 break;
 933         default:
 934                 return NL_SKIP;
 935         }
 936
 937         if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
 938                 return NL_SKIP;
 939
 940         if (type == RTM_DELRULE)
 941                 D(SYSTEM, "Remove a rule\n");
 942         else
 943                 D(SYSTEM, "Remove %s from device %s\n",
 944                   type == RTM_DELADDR ? "an address" : "a route",
 945                   clr->dev->ifname);
 946
 947         memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
 948         hdr = nlmsg_hdr(clr->msg);
 949         hdr->nlmsg_type = type;
 950         hdr->nlmsg_flags = NLM_F_REQUEST;
 951
 952         nl_socket_disable_auto_ack(sock_rtnl);
 953         ret = nl_send_auto_complete(sock_rtnl, clr->msg);
 954         if (ret < 0) {
 955                 if (type == RTM_DELRULE)
 956                         D(SYSTEM, "Error deleting a rule: %d\n", ret);
 957                 else
 958                         D(SYSTEM, "Error deleting %s from device '%s': %d\n",
 959                                 type == RTM_DELADDR ? "an address" : "a route",
 960                                 clr->dev->ifname, ret);
 961         }
 962
 963         nl_socket_enable_auto_ack(sock_rtnl);
 964
 965         return NL_SKIP;
 966 }
 967
 968 static int
 969 cb_finish_event(struct nl_msg *msg, void *arg)
 970 {
 971         int *pending = arg;
 972         *pending = 0;
 973         return NL_STOP;
 974 }
 975
 976 static int
 977 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
 978 {
 979         int *pending = arg;
 980         *pending = err->error;
 981         return NL_STOP;
 982 }
 983
 984 static void
 985 system_if_clear_entries(struct device *dev, int type, int af)
 986 {
 987         struct clear_data clr;
 988         struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
 989         struct rtmsg rtm = {
 990                 .rtm_family = af,
 991                 .rtm_flags = RTM_F_CLONED,
 992         };
 993         int flags = NLM_F_DUMP;
 994         int pending = 1;
 995
 996         if (!cb)
 997                 return;
 998
 999         clr.af = af;
1000         clr.dev = dev;
1001         clr.type = type;
1002         switch (type) {
1003         case RTM_GETADDR:
1004         case RTM_GETRULE:
1005                 clr.size = sizeof(struct rtgenmsg);
1006                 break;
1007         case RTM_GETROUTE:
1008                 clr.size = sizeof(struct rtmsg);
1009                 break;
1010         default:
1011                 return;
1012         }
1013
1014         clr.msg = nlmsg_alloc_simple(type, flags);
1015         if (!clr.msg)
1016                 goto out;
1017
1018         nlmsg_append(clr.msg, &rtm, clr.size, 0);
1019         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
1020         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
1021         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
1022
1023         if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
1024                 goto free;
1025
1026         while (pending > 0)
1027                 nl_recvmsgs(sock_rtnl, cb);
1028
1029 free:
1030         nlmsg_free(clr.msg);
1031 out:
1032         nl_cb_put(cb);
1033 }
1034
1035 /*
1036  * Clear bridge (membership) state and bring down device
1037  */
1038 void system_if_clear_state(struct device *dev)
1039 {
1040         static char buf[256];
1041         char *bridge;
1042         device_set_ifindex(dev, system_if_resolve(dev));
1043
1044         if (dev->external || !dev->ifindex)
1045                 return;
1046
1047         system_if_flags(dev->ifname, 0, IFF_UP);
1048
1049         if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
1050                 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
1051                 system_bridge_delbr(dev);
1052                 return;
1053         }
1054
1055         bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
1056         if (bridge) {
1057                 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
1058                 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
1059         }
1060
1061         system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
1062         system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
1063         system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
1064         system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
1065         system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET);
1066         system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6);
1067         system_set_disable_ipv6(dev, "0");
1068 }
1069
1070 static inline unsigned long
1071 sec_to_jiffies(int val)
1072 {
1073         return (unsigned long) val * 100;
1074 }
1075
1076 static void system_bridge_conf_multicast_deps(struct device *bridge,
1077                                               struct bridge_config *cfg,
1078                                               char *buf,
1079                                               int buf_len)
1080 {
1081         int val;
1082
1083         if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
1084             cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
1085             cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1086                 val = cfg->robustness * cfg->query_interval +
1087                         cfg->query_response_interval;
1088
1089                 snprintf(buf, buf_len, "%i", val);
1090                 system_bridge_set_membership_interval(bridge, buf);
1091
1092                 val = cfg->robustness * cfg->query_interval +
1093                         cfg->query_response_interval / 2;
1094
1095                 snprintf(buf, buf_len, "%i", val);
1096                 system_bridge_set_other_querier_timeout(bridge, buf);
1097         }
1098
1099         if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1100                 val = cfg->query_interval / 4;
1101
1102                 snprintf(buf, buf_len, "%i", val);
1103                 system_bridge_set_startup_query_interval(bridge, buf);
1104         }
1105 }
1106
1107 static void system_bridge_conf_multicast(struct device *bridge,
1108                                          struct bridge_config *cfg,
1109                                          char *buf,
1110                                          int buf_len)
1111 {
1112         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
1113                 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
1114
1115         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
1116                 bridge->ifname, cfg->multicast_querier ? "1" : "0");
1117
1118         snprintf(buf, buf_len, "%i", cfg->hash_max);
1119         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
1120                 bridge->ifname, buf);
1121
1122         if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
1123                 snprintf(buf, buf_len, "%u", bridge->settings.multicast_router);
1124                 system_bridge_set_multicast_router(bridge, buf, true);
1125         }
1126
1127         if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1128                 snprintf(buf, buf_len, "%i", cfg->robustness);
1129                 system_bridge_set_robustness(bridge, buf);
1130         }
1131
1132         if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1133                 snprintf(buf, buf_len, "%i", cfg->query_interval);
1134                 system_bridge_set_query_interval(bridge, buf);
1135         }
1136
1137         if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1138                 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1139                 system_bridge_set_query_response_interval(bridge, buf);
1140         }
1141
1142         if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1143                 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1144                 system_bridge_set_last_member_interval(bridge, buf);
1145         }
1146
1147         system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1148 }
1149
1150 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1151 {
1152         char buf[64];
1153
1154         if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1155                 return -1;
1156
1157         system_bridge_set_stp_state(bridge, cfg->stp ? "1" : "0");
1158
1159         snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->forward_delay));
1160         system_bridge_set_forward_delay(bridge, buf);
1161
1162         system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1163
1164         snprintf(buf, sizeof(buf), "%d", cfg->priority);
1165         system_bridge_set_priority(bridge, buf);
1166
1167         if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1168                 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->ageing_time));
1169                 system_bridge_set_ageing_time(bridge, buf);
1170         }
1171
1172         if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
1173                 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->hello_time));
1174                 system_bridge_set_hello_time(bridge, buf);
1175         }
1176
1177         if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1178                 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->max_age));
1179                 system_bridge_set_max_age(bridge, buf);
1180         }
1181
1182         return 0;
1183 }
1184
1185 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1186 {
1187         struct nl_msg *msg;
1188         struct nlattr *linkinfo, *data;
1189         struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1190         int i, rv;
1191         static const struct {
1192                 const char *name;
1193                 enum macvlan_mode val;
1194         } modes[] = {
1195                 { "private", MACVLAN_MODE_PRIVATE },
1196                 { "vepa", MACVLAN_MODE_VEPA },
1197                 { "bridge", MACVLAN_MODE_BRIDGE },
1198                 { "passthru", MACVLAN_MODE_PASSTHRU },
1199         };
1200
1201         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1202
1203         if (!msg)
1204                 return -1;
1205
1206         nlmsg_append(msg, &iim, sizeof(iim), 0);
1207
1208         if (cfg->flags & MACVLAN_OPT_MACADDR)
1209                 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1210         nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1211         nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1212
1213         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1214                 goto nla_put_failure;
1215
1216         nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1217
1218         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1219                 goto nla_put_failure;
1220
1221         if (cfg->mode) {
1222                 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1223                         if (strcmp(cfg->mode, modes[i].name) != 0)
1224                                 continue;
1225
1226                         nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1227                         break;
1228                 }
1229         }
1230
1231         nla_nest_end(msg, data);
1232         nla_nest_end(msg, linkinfo);
1233
1234         rv = system_rtnl_call(msg);
1235         if (rv)
1236                 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1237
1238         return rv;
1239
1240 nla_put_failure:
1241         nlmsg_free(msg);
1242         return -ENOMEM;
1243 }
1244
1245 static int system_link_del(const char *ifname)
1246 {
1247         struct nl_msg *msg;
1248         struct ifinfomsg iim = {
1249                 .ifi_family = AF_UNSPEC,
1250                 .ifi_index = 0,
1251         };
1252
1253         msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1254
1255         if (!msg)
1256                 return -1;
1257
1258         nlmsg_append(msg, &iim, sizeof(iim), 0);
1259         nla_put_string(msg, IFLA_IFNAME, ifname);
1260         return system_rtnl_call(msg);
1261 }
1262
1263 int system_macvlan_del(struct device *macvlan)
1264 {
1265         return system_link_del(macvlan->ifname);
1266 }
1267
1268 int system_veth_add(struct device *veth, struct veth_config *cfg)
1269 {
1270         struct nl_msg *msg;
1271         struct ifinfomsg empty_iim = {};
1272         struct nlattr *linkinfo, *data, *veth_info;
1273         int rv;
1274
1275         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1276
1277         if (!msg)
1278                 return -1;
1279
1280         nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1281
1282         if (cfg->flags & VETH_OPT_MACADDR)
1283                 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1284         nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1285
1286         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1287                 goto nla_put_failure;
1288
1289         nla_put_string(msg, IFLA_INFO_KIND, "veth");
1290
1291         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1292                 goto nla_put_failure;
1293
1294         if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1295                 goto nla_put_failure;
1296
1297         nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1298
1299         if (cfg->flags & VETH_OPT_PEER_NAME)
1300                 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1301         if (cfg->flags & VETH_OPT_PEER_MACADDR)
1302                 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1303
1304         nla_nest_end(msg, veth_info);
1305         nla_nest_end(msg, data);
1306         nla_nest_end(msg, linkinfo);
1307
1308         rv = system_rtnl_call(msg);
1309         if (rv) {
1310                 if (cfg->flags & VETH_OPT_PEER_NAME)
1311                         D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1312                 else
1313                         D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1314         }
1315
1316         return rv;
1317
1318 nla_put_failure:
1319         nlmsg_free(msg);
1320         return -ENOMEM;
1321 }
1322
1323 int system_veth_del(struct device *veth)
1324 {
1325         return system_link_del(veth->ifname);
1326 }
1327
1328 static int system_vlan(struct device *dev, int id)
1329 {
1330         struct vlan_ioctl_args ifr = {
1331                 .cmd = SET_VLAN_NAME_TYPE_CMD,
1332                 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1333         };
1334
1335         if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1336                 return -1;
1337
1338         if (id < 0) {
1339                 ifr.cmd = DEL_VLAN_CMD;
1340                 ifr.u.VID = 0;
1341         } else {
1342                 ifr.cmd = ADD_VLAN_CMD;
1343                 ifr.u.VID = id;
1344         }
1345         strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1346         return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1347 }
1348
1349 int system_vlan_add(struct device *dev, int id)
1350 {
1351         return system_vlan(dev, id);
1352 }
1353
1354 int system_vlan_del(struct device *dev)
1355 {
1356         return system_vlan(dev, -1);
1357 }
1358
1359 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1360 {
1361         struct nl_msg *msg;
1362         struct nlattr *linkinfo, *data;
1363         struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1364         int rv;
1365
1366         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1367
1368         if (!msg)
1369                 return -1;
1370
1371         nlmsg_append(msg, &iim, sizeof(iim), 0);
1372         nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1373         nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1374
1375         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1376                 goto nla_put_failure;
1377
1378         nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1379
1380         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1381                 goto nla_put_failure;
1382
1383         nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1384
1385 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1386         nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1387 #else
1388         if(cfg->proto == VLAN_PROTO_8021AD)
1389                 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);
1390 #endif
1391
1392         nla_nest_end(msg, data);
1393         nla_nest_end(msg, linkinfo);
1394
1395         rv = system_rtnl_call(msg);
1396         if (rv)
1397                 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1398
1399         return rv;
1400
1401 nla_put_failure:
1402         nlmsg_free(msg);
1403         return -ENOMEM;
1404 }
1405
1406 int system_vlandev_del(struct device *vlandev)
1407 {
1408         return system_link_del(vlandev->ifname);
1409 }
1410
1411 void
1412 system_if_get_settings(struct device *dev, struct device_settings *s)
1413 {
1414         struct ifreq ifr;
1415         char buf[10];
1416
1417         memset(&ifr, 0, sizeof(ifr));
1418         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1419
1420         if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1421                 s->mtu = ifr.ifr_mtu;
1422                 s->flags |= DEV_OPT_MTU;
1423         }
1424
1425         s->mtu6 = system_update_ipv6_mtu(dev, 0);
1426         if (s->mtu6 > 0)
1427                 s->flags |= DEV_OPT_MTU6;
1428
1429         if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1430                 s->txqueuelen = ifr.ifr_qlen;
1431                 s->flags |= DEV_OPT_TXQUEUELEN;
1432         }
1433
1434         if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1435                 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1436                 s->flags |= DEV_OPT_MACADDR;
1437         }
1438
1439         if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1440                 s->ipv6 = !strtoul(buf, NULL, 0);
1441                 s->flags |= DEV_OPT_IPV6;
1442         }
1443
1444         if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1445                 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1446                 s->flags |= DEV_OPT_PROMISC;
1447
1448                 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1449                 s->flags |= DEV_OPT_MULTICAST;
1450         }
1451
1452         if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1453                 s->rpfilter = strtoul(buf, NULL, 0);
1454                 s->flags |= DEV_OPT_RPFILTER;
1455         }
1456
1457         if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1458                 s->acceptlocal = strtoul(buf, NULL, 0);
1459                 s->flags |= DEV_OPT_ACCEPTLOCAL;
1460         }
1461
1462         if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1463                 s->igmpversion = strtoul(buf, NULL, 0);
1464                 s->flags |= DEV_OPT_IGMPVERSION;
1465         }
1466
1467         if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1468                 s->mldversion = strtoul(buf, NULL, 0);
1469                 s->flags |= DEV_OPT_MLDVERSION;
1470         }
1471
1472         if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1473                 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1474                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1475         }
1476
1477         if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1478                 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1479                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1480         }
1481
1482         if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1483                 s->neigh4locktime = strtol(buf, NULL, 0);
1484                 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1485         }
1486
1487         if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1488                 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1489                 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1490         }
1491
1492         if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1493                 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1494                 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1495         }
1496
1497         if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1498                 s->dadtransmits = strtoul(buf, NULL, 0);
1499                 s->flags |= DEV_OPT_DADTRANSMITS;
1500         }
1501
1502         if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1503                 s->sendredirects = strtoul(buf, NULL, 0);
1504                 s->flags |= DEV_OPT_SENDREDIRECTS;
1505         }
1506 }
1507
1508 void
1509 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1510 {
1511         struct ifreq ifr;
1512         char buf[12];
1513
1514         memset(&ifr, 0, sizeof(ifr));
1515         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1516         if (s->flags & DEV_OPT_MTU & apply_mask) {
1517                 ifr.ifr_mtu = s->mtu;
1518                 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1519                         s->flags &= ~DEV_OPT_MTU;
1520         }
1521         if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1522                 system_update_ipv6_mtu(dev, s->mtu6);
1523         }
1524         if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1525                 ifr.ifr_qlen = s->txqueuelen;
1526                 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1527                         s->flags &= ~DEV_OPT_TXQUEUELEN;
1528         }
1529         if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1530                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1531                 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1532                 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1533                         s->flags &= ~DEV_OPT_MACADDR;
1534         }
1535         if (s->flags & DEV_OPT_IPV6 & apply_mask)
1536                 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1537         if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1538                 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1539                                     !s->promisc ? IFF_PROMISC : 0) < 0)
1540                         s->flags &= ~DEV_OPT_PROMISC;
1541         }
1542         if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1543                 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1544                 system_set_rpfilter(dev, buf);
1545         }
1546         if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1547                 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1548         if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1549                 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1550                 system_set_igmpversion(dev, buf);
1551         }
1552         if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1553                 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1554                 system_set_mldversion(dev, buf);
1555         }
1556         if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1557                 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1558                 system_set_neigh4reachabletime(dev, buf);
1559                 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1560                 system_set_neigh6reachabletime(dev, buf);
1561         }
1562         if (s->flags & DEV_OPT_NEIGHLOCKTIME & apply_mask) {
1563                 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1564                 system_set_neigh4locktime(dev, buf);
1565         }
1566         if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1567                 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1568                 system_set_neigh4gcstaletime(dev, buf);
1569                 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1570                 system_set_neigh6gcstaletime(dev, buf);
1571         }
1572         if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1573                 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1574                 system_set_dadtransmits(dev, buf);
1575         }
1576         if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1577                 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1578                                     !s->multicast ? IFF_MULTICAST : 0) < 0)
1579                         s->flags &= ~DEV_OPT_MULTICAST;
1580         }
1581         if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1582                 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1583 }
1584
1585 int system_if_up(struct device *dev)
1586 {
1587         system_if_get_settings(dev, &dev->orig_settings);
1588         /* Only keep orig settings based on what needs to be set */
1589         dev->orig_settings.valid_flags = dev->orig_settings.flags;
1590         dev->orig_settings.flags &= dev->settings.flags;
1591         system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1592         return system_if_flags(dev->ifname, IFF_UP, 0);
1593 }
1594
1595 int system_if_down(struct device *dev)
1596 {
1597         int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1598         system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1599         return ret;
1600 }
1601
1602 struct if_check_data {
1603         struct device *dev;
1604         int pending;
1605         int ret;
1606 };
1607
1608 #ifndef IFF_LOWER_UP
1609 #define IFF_LOWER_UP    0x10000
1610 #endif
1611
1612 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1613 {
1614         struct nlmsghdr *nh = nlmsg_hdr(msg);
1615         struct ifinfomsg *ifi = NLMSG_DATA(nh);
1616         struct if_check_data *chk = (struct if_check_data *)arg;
1617
1618         if (nh->nlmsg_type != RTM_NEWLINK)
1619                 return NL_SKIP;
1620
1621         device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1622         device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1623
1624         return NL_OK;
1625 }
1626
1627 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1628 {
1629         struct if_check_data *chk = (struct if_check_data *)arg;
1630         chk->pending = 0;
1631         return NL_STOP;
1632 }
1633
1634 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1635 {
1636         struct if_check_data *chk = (struct if_check_data *)arg;
1637
1638         device_set_present(chk->dev, false);
1639         device_set_link(chk->dev, false);
1640         chk->pending = err->error;
1641
1642         return NL_STOP;
1643 }
1644
1645 int system_if_check(struct device *dev)
1646 {
1647         struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1648         struct nl_msg *msg;
1649         struct ifinfomsg ifi = {
1650                 .ifi_family = AF_UNSPEC,
1651                 .ifi_index = 0,
1652         };
1653         struct if_check_data chk = {
1654                 .dev = dev,
1655                 .pending = 1,
1656         };
1657         int ret = 1;
1658
1659         if (!cb)
1660                 return ret;
1661
1662         msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1663         if (!msg)
1664                 goto out;
1665
1666         if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1667             nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1668                 goto free;
1669
1670         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1671         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1672         nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1673
1674         ret = nl_send_auto_complete(sock_rtnl, msg);
1675         if (ret < 0)
1676                 goto free;
1677
1678         while (chk.pending > 0)
1679                 nl_recvmsgs(sock_rtnl, cb);
1680
1681         ret = chk.pending;
1682
1683 free:
1684         nlmsg_free(msg);
1685 out:
1686         nl_cb_put(cb);
1687         return ret;
1688 }
1689
1690 struct device *
1691 system_if_get_parent(struct device *dev)
1692 {
1693         char buf[64], *devname;
1694         int ifindex, iflink, len;
1695         FILE *f;
1696
1697         snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1698         f = fopen(buf, "r");
1699         if (!f)
1700                 return NULL;
1701
1702         len = fread(buf, 1, sizeof(buf) - 1, f);
1703         fclose(f);
1704
1705         if (len <= 0)
1706                 return NULL;
1707
1708         buf[len] = 0;
1709         iflink = strtoul(buf, NULL, 0);
1710         ifindex = system_if_resolve(dev);
1711         if (!iflink || iflink == ifindex)
1712                 return NULL;
1713
1714         devname = if_indextoname(iflink, buf);
1715         if (!devname)
1716                 return NULL;
1717
1718         return device_get(devname, true);
1719 }
1720
1721 static bool
1722 read_string_file(int dir_fd, const char *file, char *buf, int len)
1723 {
1724         bool ret = false;
1725         char *c;
1726         int fd;
1727
1728         fd = openat(dir_fd, file, O_RDONLY);
1729         if (fd < 0)
1730                 return false;
1731
1732 retry:
1733         len = read(fd, buf, len - 1);
1734         if (len < 0) {
1735                 if (errno == EINTR)
1736                         goto retry;
1737         } else if (len > 0) {
1738                         buf[len] = 0;
1739
1740                         c = strchr(buf, '\n');
1741                         if (c)
1742                                 *c = 0;
1743
1744                         ret = true;
1745         }
1746
1747         close(fd);
1748
1749         return ret;
1750 }
1751
1752 static bool
1753 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1754 {
1755         char buf[64];
1756         bool ret = false;
1757
1758         ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1759         if (ret)
1760                 *val = strtoull(buf, NULL, 0);
1761
1762         return ret;
1763 }
1764
1765 /* Assume advertised flags == supported flags */
1766 static const struct {
1767         uint32_t mask;
1768         const char *name;
1769 } ethtool_link_modes[] = {
1770         { ADVERTISED_10baseT_Half, "10baseT-H" },
1771         { ADVERTISED_10baseT_Full, "10baseT-F" },
1772         { ADVERTISED_100baseT_Half, "100baseT-H" },
1773         { ADVERTISED_100baseT_Full, "100baseT-F" },
1774         { ADVERTISED_1000baseT_Half, "1000baseT-H" },
1775         { ADVERTISED_1000baseT_Full, "1000baseT-F" },
1776         { ADVERTISED_1000baseKX_Full, "1000baseKX-F" },
1777         { ADVERTISED_2500baseX_Full, "2500baseX-F" },
1778         { ADVERTISED_10000baseT_Full, "10000baseT-F" },
1779         { ADVERTISED_10000baseKX4_Full, "10000baseKX4-F" },
1780         { ADVERTISED_10000baseKR_Full, "10000baseKR-F" },
1781         { ADVERTISED_20000baseMLD2_Full, "20000baseMLD2-F" },
1782         { ADVERTISED_20000baseKR2_Full, "20000baseKR2-F" },
1783         { ADVERTISED_40000baseKR4_Full, "40000baseKR4-F" },
1784         { ADVERTISED_40000baseCR4_Full, "40000baseCR4-F" },
1785         { ADVERTISED_40000baseSR4_Full, "40000baseSR4-F" },
1786         { ADVERTISED_40000baseLR4_Full, "40000baseLR4-F" },
1787 #ifdef ADVERTISED_56000baseKR4_Full
1788         { ADVERTISED_56000baseKR4_Full, "56000baseKR4-F" },
1789         { ADVERTISED_56000baseCR4_Full, "56000baseCR4-F" },
1790         { ADVERTISED_56000baseSR4_Full, "56000baseSR4-F" },
1791         { ADVERTISED_56000baseLR4_Full, "56000baseLR4-F" },
1792 #endif
1793 };
1794
1795 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1796 {
1797         int i;
1798         for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1799                 if (mask & ethtool_link_modes[i].mask)
1800                         blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1801         }
1802 }
1803
1804 bool
1805 system_if_force_external(const char *ifname)
1806 {
1807         char buf[64];
1808         struct stat s;
1809
1810         snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1811         return stat(buf, &s) == 0;
1812 }
1813
1814 int
1815 system_if_dump_info(struct device *dev, struct blob_buf *b)
1816 {
1817         struct ethtool_cmd ecmd;
1818         struct ifreq ifr;
1819         char *s;
1820         void *c;
1821
1822         memset(&ecmd, 0, sizeof(ecmd));
1823         memset(&ifr, 0, sizeof(ifr));
1824         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1825         ifr.ifr_data = (caddr_t) &ecmd;
1826         ecmd.cmd = ETHTOOL_GSET;
1827
1828         if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1829                 c = blobmsg_open_array(b, "link-advertising");
1830                 system_add_link_modes(b, ecmd.advertising);
1831                 blobmsg_close_array(b, c);
1832
1833                 c = blobmsg_open_array(b, "link-partner-advertising");
1834                 system_add_link_modes(b, ecmd.lp_advertising);
1835                 blobmsg_close_array(b, c);
1836
1837                 c = blobmsg_open_array(b, "link-supported");
1838                 system_add_link_modes(b, ecmd.supported);
1839                 blobmsg_close_array(b, c);
1840
1841                 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1842                 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1843                         ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1844                 blobmsg_add_string_buffer(b);
1845
1846                 blobmsg_add_u8(b, "autoneg", !!ecmd.autoneg);
1847         }
1848
1849         return 0;
1850 }
1851
1852 int
1853 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1854 {
1855         const char *const counters[] = {
1856                 "collisions",     "rx_frame_errors",   "tx_compressed",
1857                 "multicast",      "rx_length_errors",  "tx_dropped",
1858                 "rx_bytes",       "rx_missed_errors",  "tx_errors",
1859                 "rx_compressed",  "rx_over_errors",    "tx_fifo_errors",
1860                 "rx_crc_errors",  "rx_packets",        "tx_heartbeat_errors",
1861                 "rx_dropped",     "tx_aborted_errors", "tx_packets",
1862                 "rx_errors",      "tx_bytes",          "tx_window_errors",
1863                 "rx_fifo_errors", "tx_carrier_errors",
1864         };
1865         char buf[64];
1866         int stats_dir;
1867         int i;
1868         uint64_t val = 0;
1869
1870         snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1871         stats_dir = open(buf, O_DIRECTORY);
1872         if (stats_dir < 0)
1873                 return -1;
1874
1875         for (i = 0; i < ARRAY_SIZE(counters); i++)
1876                 if (read_uint64_file(stats_dir, counters[i], &val))
1877                         blobmsg_add_u64(b, counters[i], val);
1878
1879         close(stats_dir);
1880         return 0;
1881 }
1882
1883 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1884 {
1885         bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1886         int alen = v4 ? 4 : 16;
1887         unsigned int flags = 0;
1888         struct ifaddrmsg ifa = {
1889                 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1890                 .ifa_prefixlen = addr->mask,
1891                 .ifa_index = dev->ifindex,
1892         };
1893
1894         struct nl_msg *msg;
1895         if (cmd == RTM_NEWADDR)
1896                 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1897
1898         msg = nlmsg_alloc_simple(cmd, flags);
1899         if (!msg)
1900                 return -1;
1901
1902         nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1903         nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1904         if (v4) {
1905                 if (addr->broadcast)
1906                         nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1907                 if (addr->point_to_point)
1908                         nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1909         } else {
1910                 time_t now = system_get_rtime();
1911                 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1912
1913                 if (addr->preferred_until) {
1914                         int64_t preferred = addr->preferred_until - now;
1915                         if (preferred < 0)
1916                                 preferred = 0;
1917                         else if (preferred > UINT32_MAX)
1918                                 preferred = UINT32_MAX;
1919
1920                         cinfo.ifa_prefered = preferred;
1921                 }
1922
1923                 if (addr->valid_until) {
1924                         int64_t valid = addr->valid_until - now;
1925                         if (valid <= 0) {
1926                                 nlmsg_free(msg);
1927                                 return -1;
1928                         }
1929                         else if (valid > UINT32_MAX)
1930                                 valid = UINT32_MAX;
1931
1932                         cinfo.ifa_valid = valid;
1933                 }
1934
1935                 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1936
1937                 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1938                         nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1939         }
1940
1941         return system_rtnl_call(msg);
1942 }
1943
1944 int system_add_address(struct device *dev, struct device_addr *addr)
1945 {
1946         return system_addr(dev, addr, RTM_NEWADDR);
1947 }
1948
1949 int system_del_address(struct device *dev, struct device_addr *addr)
1950 {
1951         return system_addr(dev, addr, RTM_DELADDR);
1952 }
1953
1954 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
1955 {
1956         int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1957         unsigned int flags = 0;
1958         struct ndmsg ndm = {
1959                 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
1960                 .ndm_ifindex = dev->ifindex,
1961                 .ndm_state = NUD_PERMANENT,
1962                 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
1963         };
1964         struct nl_msg *msg;
1965
1966         if (cmd == RTM_NEWNEIGH)
1967                 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1968
1969         msg = nlmsg_alloc_simple(cmd, flags);
1970
1971         if (!msg)
1972                 return -1;
1973
1974         nlmsg_append(msg, &ndm, sizeof(ndm), 0);
1975
1976         nla_put(msg, NDA_DST, alen, &neighbor->addr);
1977         if (neighbor->flags & DEVNEIGH_MAC)
1978                 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
1979
1980
1981         return system_rtnl_call(msg);
1982 }
1983
1984 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
1985 {
1986         return system_neigh(dev, neighbor, RTM_NEWNEIGH);
1987 }
1988
1989 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
1990 {
1991         return system_neigh(dev, neighbor, RTM_DELNEIGH);
1992 }
1993
1994 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1995 {
1996         int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1997         bool have_gw;
1998         unsigned int flags = 0;
1999
2000         if (alen == 4)
2001                 have_gw = !!route->nexthop.in.s_addr;
2002         else
2003                 have_gw = route->nexthop.in6.s6_addr32[0] ||
2004                         route->nexthop.in6.s6_addr32[1] ||
2005                         route->nexthop.in6.s6_addr32[2] ||
2006                         route->nexthop.in6.s6_addr32[3];
2007
2008         unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
2009                         ? route->table : RT_TABLE_MAIN;
2010
2011         struct rtmsg rtm = {
2012                 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2013                 .rtm_dst_len = route->mask,
2014                 .rtm_src_len = route->sourcemask,
2015                 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
2016                 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
2017                 .rtm_scope = RT_SCOPE_NOWHERE,
2018                 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
2019                 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
2020         };
2021         struct nl_msg *msg;
2022
2023         if (cmd == RTM_NEWROUTE) {
2024                 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2025
2026                 if (!dev) { /* Add null-route */
2027                         rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2028                         rtm.rtm_type = RTN_UNREACHABLE;
2029                 }
2030                 else
2031                         rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
2032         }
2033
2034         if (route->flags & DEVROUTE_TYPE) {
2035                 rtm.rtm_type = route->type;
2036                 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
2037                         if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
2038                             rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
2039                                 rtm.rtm_table = RT_TABLE_LOCAL;
2040                 }
2041
2042                 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
2043                         rtm.rtm_scope = RT_SCOPE_HOST;
2044                 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
2045                                 rtm.rtm_type == RTN_ANYCAST) {
2046                         rtm.rtm_scope = RT_SCOPE_LINK;
2047                 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
2048                                 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
2049                                 rtm.rtm_type == RTN_THROW) {
2050                         rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2051                         dev = NULL;
2052                 }
2053         }
2054
2055         msg = nlmsg_alloc_simple(cmd, flags);
2056         if (!msg)
2057                 return -1;
2058
2059         nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2060
2061         if (route->mask)
2062                 nla_put(msg, RTA_DST, alen, &route->addr);
2063
2064         if (route->sourcemask) {
2065                 if (rtm.rtm_family == AF_INET)
2066                         nla_put(msg, RTA_PREFSRC, alen, &route->source);
2067                 else
2068                         nla_put(msg, RTA_SRC, alen, &route->source);
2069         }
2070
2071         if (route->metric > 0)
2072                 nla_put_u32(msg, RTA_PRIORITY, route->metric);
2073
2074         if (have_gw)
2075                 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
2076
2077         if (dev)
2078                 nla_put_u32(msg, RTA_OIF, dev->ifindex);
2079
2080         if (table >= 256)
2081                 nla_put_u32(msg, RTA_TABLE, table);
2082
2083         if (route->flags & DEVROUTE_MTU) {
2084                 struct nlattr *metrics;
2085
2086                 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
2087                         goto nla_put_failure;
2088
2089                 nla_put_u32(msg, RTAX_MTU, route->mtu);
2090
2091                 nla_nest_end(msg, metrics);
2092         }
2093
2094         return system_rtnl_call(msg);
2095
2096 nla_put_failure:
2097         nlmsg_free(msg);
2098         return -ENOMEM;
2099 }
2100
2101 int system_add_route(struct device *dev, struct device_route *route)
2102 {
2103         return system_rt(dev, route, RTM_NEWROUTE);
2104 }
2105
2106 int system_del_route(struct device *dev, struct device_route *route)
2107 {
2108         return system_rt(dev, route, RTM_DELROUTE);
2109 }
2110
2111 int system_flush_routes(void)
2112 {
2113         const char *names[] = {
2114                 "/proc/sys/net/ipv4/route/flush",
2115                 "/proc/sys/net/ipv6/route/flush"
2116         };
2117         int fd, i;
2118
2119         for (i = 0; i < ARRAY_SIZE(names); i++) {
2120                 fd = open(names[i], O_WRONLY);
2121                 if (fd < 0)
2122                         continue;
2123
2124                 if (write(fd, "-1", 2)) {}
2125                 close(fd);
2126         }
2127         return 0;
2128 }
2129
2130 bool system_resolve_rt_type(const char *type, unsigned int *id)
2131 {
2132         return system_rtn_aton(type, id);
2133 }
2134
2135 bool system_resolve_rt_proto(const char *type, unsigned int *id)
2136 {
2137         FILE *f;
2138         char *e, buf[128];
2139         unsigned int n, proto = 256;
2140         n = strtoul(type, &e, 0);
2141         if (!*e && e != type)
2142                 proto = n;
2143         else if (!strcmp(type, "unspec"))
2144                 proto = RTPROT_UNSPEC;
2145         else if (!strcmp(type, "kernel"))
2146                 proto = RTPROT_KERNEL;
2147         else if (!strcmp(type, "boot"))
2148                 proto = RTPROT_BOOT;
2149         else if (!strcmp(type, "static"))
2150                 proto = RTPROT_STATIC;
2151         else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2152                 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2153                         if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2154                                 continue;
2155
2156                         n = strtoul(e, NULL, 10);
2157                         e = strtok(NULL, " \t\n");
2158
2159                         if (e && !strcmp(e, type)) {
2160                                 proto = n;
2161                                 break;
2162                         }
2163                 }
2164                 fclose(f);
2165         }
2166
2167         if (proto > 255)
2168                 return false;
2169
2170         *id = proto;
2171         return true;
2172 }
2173
2174 bool system_resolve_rt_table(const char *name, unsigned int *id)
2175 {
2176         FILE *f;
2177         char *e, buf[128];
2178         unsigned int n, table = RT_TABLE_UNSPEC;
2179
2180         /* first try to parse table as number */
2181         if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2182                 table = n;
2183
2184         /* handle well known aliases */
2185         else if (!strcmp(name, "default"))
2186                 table = RT_TABLE_DEFAULT;
2187         else if (!strcmp(name, "main"))
2188                 table = RT_TABLE_MAIN;
2189         else if (!strcmp(name, "local"))
2190                 table = RT_TABLE_LOCAL;
2191
2192         /* try to look up name in /etc/iproute2/rt_tables */
2193         else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2194         {
2195                 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2196                 {
2197                         if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2198                                 continue;
2199
2200                         n = strtoul(e, NULL, 10);
2201                         e = strtok(NULL, " \t\n");
2202
2203                         if (e && !strcmp(e, name))
2204                         {
2205                                 table = n;
2206                                 break;
2207                         }
2208                 }
2209
2210                 fclose(f);
2211         }
2212
2213         if (table == RT_TABLE_UNSPEC)
2214                 return false;
2215
2216         *id = table;
2217         return true;
2218 }
2219
2220 bool system_is_default_rt_table(unsigned int id)
2221 {
2222         return (id == RT_TABLE_MAIN);
2223 }
2224
2225 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2226 {
2227         char *e;
2228         unsigned int n;
2229
2230         if (!strcmp(filter, "strict"))
2231                 n = 1;
2232         else if (!strcmp(filter, "loose"))
2233                 n = 2;
2234         else {
2235                 n = strtoul(filter, &e, 0);
2236                 if (*e || e == filter || n > 2)
2237                         return false;
2238         }
2239
2240         *id = n;
2241         return true;
2242 }
2243
2244 static int system_iprule(struct iprule *rule, int cmd)
2245 {
2246         int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2247
2248         struct nl_msg *msg;
2249         struct rtmsg rtm = {
2250                 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2251                 .rtm_protocol = RTPROT_STATIC,
2252                 .rtm_scope = RT_SCOPE_UNIVERSE,
2253                 .rtm_table = RT_TABLE_UNSPEC,
2254                 .rtm_type = RTN_UNSPEC,
2255                 .rtm_flags = 0,
2256         };
2257
2258         if (cmd == RTM_NEWRULE)
2259                 rtm.rtm_type = RTN_UNICAST;
2260
2261         if (rule->invert)
2262                 rtm.rtm_flags |= FIB_RULE_INVERT;
2263
2264         if (rule->flags & IPRULE_SRC)
2265                 rtm.rtm_src_len = rule->src_mask;
2266
2267         if (rule->flags & IPRULE_DEST)
2268                 rtm.rtm_dst_len = rule->dest_mask;
2269
2270         if (rule->flags & IPRULE_TOS)
2271                 rtm.rtm_tos = rule->tos;
2272
2273         if (rule->flags & IPRULE_LOOKUP) {
2274                 if (rule->lookup < 256)
2275                         rtm.rtm_table = rule->lookup;
2276         }
2277
2278         if (rule->flags & IPRULE_ACTION)
2279                 rtm.rtm_type = rule->action;
2280         else if (rule->flags & IPRULE_GOTO)
2281                 rtm.rtm_type = FR_ACT_GOTO;
2282         else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2283                 rtm.rtm_type = FR_ACT_NOP;
2284
2285         msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2286
2287         if (!msg)
2288                 return -1;
2289
2290         nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2291
2292         if (rule->flags & IPRULE_IN)
2293                 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2294
2295         if (rule->flags & IPRULE_OUT)
2296                 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2297
2298         if (rule->flags & IPRULE_SRC)
2299                 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2300
2301         if (rule->flags & IPRULE_DEST)
2302                 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2303
2304         if (rule->flags & IPRULE_PRIORITY)
2305                 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2306         else if (cmd == RTM_NEWRULE)
2307                 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2308
2309         if (rule->flags & IPRULE_FWMARK)
2310                 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2311
2312         if (rule->flags & IPRULE_FWMASK)
2313                 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2314
2315         if (rule->flags & IPRULE_LOOKUP) {
2316                 if (rule->lookup >= 256)
2317                         nla_put_u32(msg, FRA_TABLE, rule->lookup);
2318         }
2319
2320         if (rule->flags & IPRULE_SUP_PREFIXLEN)
2321                 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2322
2323         if (rule->flags & IPRULE_GOTO)
2324                 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2325
2326         return system_rtnl_call(msg);
2327 }
2328
2329 int system_add_iprule(struct iprule *rule)
2330 {
2331         return system_iprule(rule, RTM_NEWRULE);
2332 }
2333
2334 int system_del_iprule(struct iprule *rule)
2335 {
2336         return system_iprule(rule, RTM_DELRULE);
2337 }
2338
2339 int system_flush_iprules(void)
2340 {
2341         int rv = 0;
2342         struct iprule rule;
2343
2344         system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2345         system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2346
2347         memset(&rule, 0, sizeof(rule));
2348
2349
2350         rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2351
2352         rule.priority = 0;
2353         rule.lookup = RT_TABLE_LOCAL;
2354         rv |= system_iprule(&rule, RTM_NEWRULE);
2355
2356         rule.priority = 32766;
2357         rule.lookup = RT_TABLE_MAIN;
2358         rv |= system_iprule(&rule, RTM_NEWRULE);
2359
2360         rule.priority = 32767;
2361         rule.lookup = RT_TABLE_DEFAULT;
2362         rv |= system_iprule(&rule, RTM_NEWRULE);
2363
2364
2365         rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2366
2367         rule.priority = 0;
2368         rule.lookup = RT_TABLE_LOCAL;
2369         rv |= system_iprule(&rule, RTM_NEWRULE);
2370
2371         rule.priority = 32766;
2372         rule.lookup = RT_TABLE_MAIN;
2373         rv |= system_iprule(&rule, RTM_NEWRULE);
2374
2375         return rv;
2376 }
2377
2378 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2379 {
2380         return system_rtn_aton(action, id);
2381 }
2382
2383 time_t system_get_rtime(void)
2384 {
2385         struct timespec ts;
2386         struct timeval tv;
2387
2388         if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2389                 return ts.tv_sec;
2390
2391         if (gettimeofday(&tv, NULL) == 0)
2392                 return tv.tv_sec;
2393
2394         return 0;
2395 }
2396
2397 #ifndef IP_DF
2398 #define IP_DF       0x4000
2399 #endif
2400
2401 static int tunnel_ioctl(const char *name, int cmd, void *p)
2402 {
2403         struct ifreq ifr;
2404
2405         memset(&ifr, 0, sizeof(ifr));
2406         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
2407         ifr.ifr_ifru.ifru_data = p;
2408         return ioctl(sock_ioctl, cmd, &ifr);
2409 }
2410
2411 #ifdef IFLA_IPTUN_MAX
2412 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2413                                  struct blob_attr **tb)
2414 {
2415         struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2416                                 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2417         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2418         struct blob_attr *cur;
2419         int ret = 0, ttl = 0;
2420
2421         if (!nlm)
2422                 return -1;
2423
2424         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2425         nla_put_string(nlm, IFLA_IFNAME, name);
2426
2427         if (link)
2428                 nla_put_u32(nlm, IFLA_LINK, link);
2429
2430         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2431         if (!linkinfo) {
2432                 ret = -ENOMEM;
2433                 goto failure;
2434         }
2435
2436         nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2437         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2438         if (!infodata) {
2439                 ret = -ENOMEM;
2440                 goto failure;
2441         }
2442
2443         if (link)
2444                 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2445
2446         if ((cur = tb[TUNNEL_ATTR_TTL]))
2447                 ttl = blobmsg_get_u32(cur);
2448
2449         nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2450         nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2451
2452         struct in6_addr in6buf;
2453         if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2454                 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2455                         ret = -EINVAL;
2456                         goto failure;
2457                 }
2458                 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2459         }
2460
2461         if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2462                 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2463                         ret = -EINVAL;
2464                         goto failure;
2465                 }
2466                 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2467         }
2468
2469         if ((cur = tb[TUNNEL_ATTR_DATA])) {
2470                 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
2471                 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
2472
2473                 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
2474                         blobmsg_data(cur), blobmsg_len(cur));
2475
2476                 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
2477                         char *str = blobmsg_get_string(cur);
2478
2479                         if (strcmp(str, "ignore")) {
2480                                 char *e;
2481                                 unsigned encap_limit = strtoul(str, &e, 0);
2482
2483                                 if (e == str || *e || encap_limit > 255) {
2484                                         ret = -EINVAL;
2485                                         goto failure;
2486                                 }
2487
2488                                 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
2489                                 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2490                         }
2491                 }
2492
2493 #ifdef IFLA_IPTUN_FMR_MAX
2494                 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
2495                         struct blob_attr *rcur;
2496                         unsigned rrem, fmrcnt = 0;
2497                         struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2498
2499                         if (!fmrs) {
2500                                 ret = -ENOMEM;
2501                                 goto failure;
2502                         }
2503
2504                         blobmsg_for_each_attr(rcur, cur, rrem) {
2505                                 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
2506                                 struct in6_addr ip6prefix;
2507                                 struct in_addr ip4prefix;
2508                                 unsigned ip4len, ip6len, ealen, offset;
2509
2510                                 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
2511                                                 blobmsg_data(rcur), blobmsg_len(rcur));
2512
2513                                 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
2514                                                 !parse_ip_and_netmask(AF_INET6,
2515                                                         blobmsg_data(tb_cur), &ip6prefix,
2516                                                         &ip6len)) {
2517                                         ret = -EINVAL;
2518                                         goto failure;
2519                                 }
2520
2521                                 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
2522                                                 !parse_ip_and_netmask(AF_INET,
2523                                                         blobmsg_data(tb_cur), &ip4prefix,
2524                                                         &ip4len)) {
2525                                         ret = -EINVAL;
2526                                         goto failure;
2527                                 }
2528
2529                                 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
2530                                         ret = -EINVAL;
2531                                         goto failure;
2532                                 }
2533                                 ealen = blobmsg_get_u32(tb_cur);
2534
2535                                 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
2536                                         ret = -EINVAL;
2537                                         goto failure;
2538                                 }
2539                                 offset = blobmsg_get_u32(tb_cur);
2540
2541                                 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2542                                 if (!rule) {
2543                                         ret = -ENOMEM;
2544                                         goto failure;
2545                                 }
2546
2547                                 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2548                                 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2549                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2550                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2551                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2552                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2553
2554                                 nla_nest_end(nlm, rule);
2555                         }
2556
2557                         nla_nest_end(nlm, fmrs);
2558                 }
2559 #endif
2560                 if (tun_flags)
2561                         nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
2562         }
2563
2564         nla_nest_end(nlm, infodata);
2565         nla_nest_end(nlm, linkinfo);
2566
2567         return system_rtnl_call(nlm);
2568
2569 failure:
2570         nlmsg_free(nlm);
2571         return ret;
2572 }
2573 #endif
2574
2575 #ifdef IFLA_IPTUN_MAX
2576 #define IP6_FLOWINFO_TCLASS     htonl(0x0FF00000)
2577 static int system_add_gre_tunnel(const char *name, const char *kind,
2578                                  const unsigned int link, struct blob_attr **tb, bool v6)
2579 {
2580         struct nl_msg *nlm;
2581         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2582         struct blob_attr *cur;
2583         uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
2584         uint16_t iflags = 0, oflags = 0;
2585         uint8_t tos = 0;
2586         int ret = 0, ttl = 0;
2587         unsigned encap_limit = 0;
2588
2589         nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2590         if (!nlm)
2591                 return -1;
2592
2593         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2594         nla_put_string(nlm, IFLA_IFNAME, name);
2595
2596         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2597         if (!linkinfo) {
2598                 ret = -ENOMEM;
2599                 goto failure;
2600         }
2601
2602         nla_put_string(nlm, IFLA_INFO_KIND, kind);
2603         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2604         if (!infodata) {
2605                 ret = -ENOMEM;
2606                 goto failure;
2607         }
2608
2609         if (link)
2610                 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2611
2612         if ((cur = tb[TUNNEL_ATTR_TTL]))
2613                 ttl = blobmsg_get_u32(cur);
2614
2615         if ((cur = tb[TUNNEL_ATTR_TOS])) {
2616                 char *str = blobmsg_get_string(cur);
2617                 if (strcmp(str, "inherit")) {
2618                         unsigned uval;
2619
2620                         if (!system_tos_aton(str, &uval)) {
2621                                 ret = -EINVAL;
2622                                 goto failure;
2623                         }
2624
2625                         if (v6)
2626                                 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2627                         else
2628                                 tos = uval;
2629                 } else {
2630                         if (v6)
2631                                 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
2632                         else
2633                                 tos = 1;
2634                 }
2635         }
2636
2637         if ((cur = tb[TUNNEL_ATTR_DATA])) {
2638                 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
2639
2640                 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
2641                         blobmsg_data(cur), blobmsg_len(cur));
2642
2643                 if ((cur = tb_data[GRE_DATA_IKEY])) {
2644                         if ((ikey = blobmsg_get_u32(cur)))
2645                                 iflags |= GRE_KEY;
2646                 }
2647
2648                 if ((cur = tb_data[GRE_DATA_OKEY])) {
2649                         if ((okey = blobmsg_get_u32(cur)))
2650                                 oflags |= GRE_KEY;
2651                 }
2652
2653                 if ((cur = tb_data[GRE_DATA_ICSUM])) {
2654                         if (blobmsg_get_bool(cur))
2655                                 iflags |= GRE_CSUM;
2656                 }
2657
2658                 if ((cur = tb_data[GRE_DATA_OCSUM])) {
2659                         if (blobmsg_get_bool(cur))
2660                                 oflags |= GRE_CSUM;
2661                 }
2662
2663                 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
2664                         if (blobmsg_get_bool(cur))
2665                                 iflags |= GRE_SEQ;
2666                 }
2667
2668                 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
2669                         if (blobmsg_get_bool(cur))
2670                                 oflags |= GRE_SEQ;
2671                 }
2672
2673                 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
2674                         char *str = blobmsg_get_string(cur);
2675
2676                         if (strcmp(str, "ignore")) {
2677                                 char *e;
2678
2679                                 encap_limit = strtoul(str, &e, 0);
2680
2681                                 if (e == str || *e || encap_limit > 255) {
2682                                         ret = -EINVAL;
2683                                         goto failure;
2684                                 }
2685
2686                                 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2687                         }
2688                 }
2689         }
2690
2691         if (v6) {
2692                 struct in6_addr in6buf;
2693                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2694                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2695                                 ret = -EINVAL;
2696                                 goto failure;
2697                         }
2698                         nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2699                 }
2700
2701                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2702                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2703                                 ret = -EINVAL;
2704                                 goto failure;
2705                         }
2706                         nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2707                 }
2708
2709                 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
2710                         nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
2711
2712                 if (flowinfo)
2713                         nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2714
2715                 if (flags6)
2716                         nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
2717
2718                 if (!ttl)
2719                         ttl = 64;
2720         } else {
2721                 struct in_addr inbuf;
2722                 bool set_df = true;
2723
2724                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2725                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2726                                 ret = -EINVAL;
2727                                 goto failure;
2728                         }
2729                         nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2730                 }
2731
2732                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2733                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2734                                 ret = -EINVAL;
2735                                 goto failure;
2736                         }
2737                         nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2738
2739                         if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2740                                 if (!okey) {
2741                                         okey = inbuf.s_addr;
2742                                         oflags |= GRE_KEY;
2743                                 }
2744
2745                                 if (!ikey) {
2746                                         ikey = inbuf.s_addr;
2747                                         iflags |= GRE_KEY;
2748                                 }
2749                         }
2750                 }
2751
2752                 if ((cur = tb[TUNNEL_ATTR_DF]))
2753                         set_df = blobmsg_get_bool(cur);
2754
2755                 if (!set_df) {
2756                         /* ttl != 0 and nopmtudisc are incompatible */
2757                         if (ttl) {
2758                                 ret = -EINVAL;
2759                                 goto failure;
2760                         }
2761                 } else if (!ttl)
2762                         ttl = 64;
2763
2764                 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2765
2766                 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2767         }
2768
2769         if (ttl)
2770                 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2771
2772         if (oflags)
2773                 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2774
2775         if (iflags)
2776                 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2777
2778         if (okey)
2779                 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
2780
2781         if (ikey)
2782                 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
2783
2784         nla_nest_end(nlm, infodata);
2785         nla_nest_end(nlm, linkinfo);
2786
2787         return system_rtnl_call(nlm);
2788
2789 failure:
2790         nlmsg_free(nlm);
2791         return ret;
2792 }
2793 #endif
2794
2795 #ifdef IFLA_VTI_MAX
2796 static int system_add_vti_tunnel(const char *name, const char *kind,
2797                                  const unsigned int link, struct blob_attr **tb, bool v6)
2798 {
2799         struct nl_msg *nlm;
2800         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2801         struct blob_attr *cur;
2802         int ret = 0;
2803
2804         nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2805         if (!nlm)
2806                 return -1;
2807
2808         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2809         nla_put_string(nlm, IFLA_IFNAME, name);
2810
2811         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2812         if (!linkinfo) {
2813                 ret = -ENOMEM;
2814                 goto failure;
2815         }
2816
2817         nla_put_string(nlm, IFLA_INFO_KIND, kind);
2818         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2819         if (!infodata) {
2820                 ret = -ENOMEM;
2821                 goto failure;
2822         }
2823
2824         if (link)
2825                 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2826
2827         if (v6) {
2828                 struct in6_addr in6buf;
2829                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2830                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2831                                 ret = -EINVAL;
2832                                 goto failure;
2833                         }
2834                         nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2835                 }
2836
2837                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2838                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2839                                 ret = -EINVAL;
2840                                 goto failure;
2841                         }
2842                         nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2843                 }
2844
2845         } else {
2846                 struct in_addr inbuf;
2847
2848                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2849                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2850                                 ret = -EINVAL;
2851                                 goto failure;
2852                         }
2853                         nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2854                 }
2855
2856                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2857                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2858                                 ret = -EINVAL;
2859                                 goto failure;
2860                         }
2861                         nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2862                 }
2863
2864         }
2865
2866         if ((cur = tb[TUNNEL_ATTR_DATA])) {
2867                 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
2868                 uint32_t ikey = 0, okey = 0;
2869
2870                 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
2871                         blobmsg_data(cur), blobmsg_len(cur));
2872
2873                 if ((cur = tb_data[VTI_DATA_IKEY])) {
2874                         if ((ikey = blobmsg_get_u32(cur)))
2875                                 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2876                 }
2877
2878                 if ((cur = tb_data[VTI_DATA_OKEY])) {
2879                         if ((okey = blobmsg_get_u32(cur)))
2880                                 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2881                 }
2882         }
2883
2884         nla_nest_end(nlm, infodata);
2885         nla_nest_end(nlm, linkinfo);
2886
2887         return system_rtnl_call(nlm);
2888
2889 failure:
2890         nlmsg_free(nlm);
2891         return ret;
2892 }
2893 #endif
2894
2895 #ifdef IFLA_XFRM_MAX
2896 static int system_add_xfrm_tunnel(const char *name, const char *kind,
2897                                  const unsigned int link, struct blob_attr **tb)
2898 {
2899         struct nl_msg *nlm;
2900         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2901         struct blob_attr *cur;
2902         int ret = 0;
2903
2904         nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2905         if (!nlm)
2906                 return -1;
2907
2908         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2909         nla_put_string(nlm, IFLA_IFNAME, name);
2910
2911         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2912         if (!linkinfo) {
2913                 ret = -ENOMEM;
2914                 goto failure;
2915         }
2916
2917         nla_put_string(nlm, IFLA_INFO_KIND, kind);
2918         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2919         if (!infodata) {
2920                 ret = -ENOMEM;
2921                 goto failure;
2922         }
2923
2924         if (link)
2925                 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
2926
2927         if ((cur = tb[TUNNEL_ATTR_DATA])) {
2928                 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
2929                 uint32_t if_id = 0;
2930
2931                 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
2932                         blobmsg_data(cur), blobmsg_len(cur));
2933
2934                 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
2935                         if ((if_id = blobmsg_get_u32(cur)))
2936                                 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
2937                 }
2938
2939         }
2940
2941         nla_nest_end(nlm, infodata);
2942         nla_nest_end(nlm, linkinfo);
2943
2944         return system_rtnl_call(nlm);
2945
2946 failure:
2947         nlmsg_free(nlm);
2948         return ret;
2949 }
2950 #endif
2951
2952 #ifdef IFLA_VXLAN_MAX
2953 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
2954 {
2955         struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
2956         struct nl_msg *msg;
2957         struct nlattr *linkinfo, *data;
2958         struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
2959         struct blob_attr *cur;
2960         int ret = 0;
2961
2962         if ((cur = tb[TUNNEL_ATTR_DATA]))
2963                 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
2964                         blobmsg_data(cur), blobmsg_len(cur));
2965         else
2966                 return -EINVAL;
2967
2968         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
2969
2970         if (!msg)
2971                 return -1;
2972
2973         nlmsg_append(msg, &iim, sizeof(iim), 0);
2974
2975         nla_put_string(msg, IFLA_IFNAME, name);
2976
2977         if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
2978                 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
2979                 if (!ea) {
2980                         ret = -EINVAL;
2981                         goto failure;
2982                 }
2983
2984                 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
2985         }
2986
2987         if ((cur = tb[TUNNEL_ATTR_MTU])) {
2988                 uint32_t mtu = blobmsg_get_u32(cur);
2989                 nla_put_u32(msg, IFLA_MTU, mtu);
2990         }
2991
2992         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
2993                 ret = -ENOMEM;
2994                 goto failure;
2995         }
2996
2997         nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
2998
2999         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
3000                 ret = -ENOMEM;
3001                 goto failure;
3002         }
3003
3004         if (link)
3005                 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
3006
3007         if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
3008                 uint32_t id = blobmsg_get_u32(cur);
3009                 if (id >= (1u << 24) - 1) {
3010                         ret = -EINVAL;
3011                         goto failure;
3012                 }
3013
3014                 nla_put_u32(msg, IFLA_VXLAN_ID, id);
3015         }
3016
3017         if (v6) {
3018                 struct in6_addr in6buf;
3019                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3020                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3021                                 ret = -EINVAL;
3022                                 goto failure;
3023                         }
3024                         nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
3025                 }
3026
3027                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3028                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3029                                 ret = -EINVAL;
3030                                 goto failure;
3031                         }
3032                         nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
3033                 }
3034         } else {
3035                 struct in_addr inbuf;
3036
3037                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3038                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3039                                 ret = -EINVAL;
3040                                 goto failure;
3041                         }
3042                         nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
3043                 }
3044
3045                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3046                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3047                                 ret = -EINVAL;
3048                                 goto failure;
3049                         }
3050                         nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
3051                 }
3052         }
3053
3054         uint32_t port = 4789;
3055         if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
3056                 port = blobmsg_get_u32(cur);
3057                 if (port < 1 || port > 65535) {
3058                         ret = -EINVAL;
3059                         goto failure;
3060                 }
3061         }
3062         nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
3063
3064         if ((cur = tb_data[VXLAN_DATA_ATTR_RXCSUM])) {
3065                 bool rxcsum = blobmsg_get_bool(cur);
3066                 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, !rxcsum);
3067         }
3068
3069         if ((cur = tb_data[VXLAN_DATA_ATTR_TXCSUM])) {
3070                 bool txcsum = blobmsg_get_bool(cur);
3071                 nla_put_u8(msg, IFLA_VXLAN_UDP_CSUM, txcsum);
3072                 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, !txcsum);
3073         }
3074
3075         if ((cur = tb[TUNNEL_ATTR_TOS])) {
3076                 char *str = blobmsg_get_string(cur);
3077                 unsigned tos = 1;
3078
3079                 if (strcmp(str, "inherit")) {
3080                         if (!system_tos_aton(str, &tos)) {
3081                                 ret = -EINVAL;
3082                                 goto failure;
3083                         }
3084                 }
3085
3086                 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
3087         }
3088
3089         if ((cur = tb[TUNNEL_ATTR_TTL])) {
3090                 uint32_t ttl = blobmsg_get_u32(cur);
3091                 if (ttl < 1 || ttl > 255) {
3092                         ret = -EINVAL;
3093                         goto failure;
3094                 }
3095
3096                 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
3097         }
3098
3099         nla_nest_end(msg, data);
3100         nla_nest_end(msg, linkinfo);
3101
3102         ret = system_rtnl_call(msg);
3103         if (ret)
3104                 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
3105
3106         return ret;
3107
3108 failure:
3109         nlmsg_free(msg);
3110         return ret;
3111 }
3112 #endif
3113
3114 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
3115 {
3116         struct blob_attr *cur;
3117         int ret = 0;
3118
3119         if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
3120                 return -1;
3121
3122 #ifdef SIOCADD6RD
3123         if ((cur = tb[TUNNEL_ATTR_DATA])) {
3124                 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
3125                 unsigned int mask;
3126                 struct ip_tunnel_6rd p6;
3127
3128                 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
3129                         blobmsg_data(cur), blobmsg_len(cur));
3130
3131                 memset(&p6, 0, sizeof(p6));
3132
3133                 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
3134                         if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
3135                                                 &p6.prefix, &mask) || mask > 128) {
3136                                 ret = -EINVAL;
3137                                 goto failure;
3138                         }
3139
3140                         p6.prefixlen = mask;
3141                 }
3142
3143                 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
3144                         if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
3145                                                 &p6.relay_prefix, &mask) || mask > 32) {
3146                                 ret = -EINVAL;
3147                                 goto failure;
3148                         }
3149
3150                         p6.relay_prefixlen = mask;
3151                 }
3152
3153                 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
3154                         ret = -1;
3155                         goto failure;
3156                 }
3157         }
3158 #endif
3159
3160         return ret;
3161
3162 failure:
3163         __system_del_ip_tunnel(name, tb);
3164         return ret;
3165 }
3166
3167 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
3168 {
3169         struct blob_attr *cur;
3170         bool set_df = true;
3171         struct ip_tunnel_parm p  = {
3172                 .link = link,
3173                 .iph = {
3174                         .version = 4,
3175                         .ihl = 5,
3176                         .protocol = proto,
3177                 }
3178         };
3179
3180         if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
3181                         inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
3182                 return -EINVAL;
3183
3184         if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
3185                         inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
3186                 return -EINVAL;
3187
3188         if ((cur = tb[TUNNEL_ATTR_DF]))
3189                 set_df = blobmsg_get_bool(cur);
3190
3191         if ((cur = tb[TUNNEL_ATTR_TTL]))
3192                 p.iph.ttl = blobmsg_get_u32(cur);
3193
3194         if ((cur = tb[TUNNEL_ATTR_TOS])) {
3195                 char *str = blobmsg_get_string(cur);
3196                 if (strcmp(str, "inherit")) {
3197                         unsigned uval;
3198
3199                         if (!system_tos_aton(str, &uval))
3200                                 return -EINVAL;
3201
3202                         p.iph.tos = uval;
3203                 } else
3204                         p.iph.tos = 1;
3205         }
3206
3207         p.iph.frag_off = set_df ? htons(IP_DF) : 0;
3208         /* ttl !=0 and nopmtudisc are incompatible */
3209         if (p.iph.ttl && p.iph.frag_off == 0)
3210                 return -EINVAL;
3211
3212         strncpy(p.name, name, sizeof(p.name) - 1);
3213
3214         switch (p.iph.protocol) {
3215         case IPPROTO_IPIP:
3216                 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
3217         case IPPROTO_IPV6:
3218                 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
3219         default:
3220                 break;
3221         }
3222         return -1;
3223 }
3224
3225 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
3226 {
3227         struct blob_attr *cur;
3228         const char *str;
3229
3230         if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3231                 return -EINVAL;
3232         str = blobmsg_data(cur);
3233
3234         if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
3235             !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
3236             !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
3237             !strcmp(str, "vxlan") || !strcmp(str, "vxlan6") ||
3238             !strcmp(str, "xfrm"))
3239                 return system_link_del(name);
3240         else
3241                 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
3242 }
3243
3244 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
3245 {
3246         struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3247
3248         blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3249                 blob_data(attr), blob_len(attr));
3250
3251         return __system_del_ip_tunnel(name, tb);
3252 }
3253
3254 int system_update_ipv6_mtu(struct device *dev, int mtu)
3255 {
3256         int ret = -1;
3257         char buf[64];
3258         int fd;
3259
3260         snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
3261                         dev->ifname);
3262
3263         fd = open(buf, O_RDWR);
3264         if (fd < 0)
3265                 return ret;
3266
3267         if (!mtu) {
3268                 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3269                 if (len < 0)
3270                         goto out;
3271
3272                 buf[len] = 0;
3273                 ret = atoi(buf);
3274         } else {
3275                 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3276                         ret = mtu;
3277         }
3278
3279 out:
3280         close(fd);
3281         return ret;
3282 }
3283
3284 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3285 {
3286         struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3287         struct blob_attr *cur;
3288         const char *str;
3289
3290         blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3291                 blob_data(attr), blob_len(attr));
3292
3293         __system_del_ip_tunnel(name, tb);
3294
3295         if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3296                 return -EINVAL;
3297         str = blobmsg_data(cur);
3298
3299         unsigned int ttl = 0;
3300         if ((cur = tb[TUNNEL_ATTR_TTL])) {
3301                 ttl = blobmsg_get_u32(cur);
3302                 if (ttl > 255)
3303                         return -EINVAL;
3304         }
3305
3306         unsigned int link = 0;
3307         if ((cur = tb[TUNNEL_ATTR_LINK])) {
3308                 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3309                 if (!iface)
3310                         return -EINVAL;
3311
3312                 if (iface->l3_dev.dev)
3313                         link = iface->l3_dev.dev->ifindex;
3314         }
3315
3316         if (!strcmp(str, "sit"))
3317                 return system_add_sit_tunnel(name, link, tb);
3318 #ifdef IFLA_IPTUN_MAX
3319         else if (!strcmp(str, "ipip6")) {
3320                 return system_add_ip6_tunnel(name, link, tb);
3321         } else if (!strcmp(str, "greip")) {
3322                 return system_add_gre_tunnel(name, "gre", link, tb, false);
3323         } else if (!strcmp(str, "gretapip"))  {
3324                 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3325         } else if (!strcmp(str, "greip6")) {
3326                 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3327         } else if (!strcmp(str, "gretapip6")) {
3328                 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3329 #ifdef IFLA_VTI_MAX
3330         } else if (!strcmp(str, "vtiip")) {
3331                 return system_add_vti_tunnel(name, "vti", link, tb, false);
3332         } else if (!strcmp(str, "vtiip6")) {
3333                 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3334 #endif
3335 #ifdef IFLA_XFRM_MAX
3336         } else if (!strcmp(str, "xfrm")) {
3337                 return system_add_xfrm_tunnel(name, "xfrm", link, tb);
3338 #endif
3339 #ifdef IFLA_VXLAN_MAX
3340         } else if(!strcmp(str, "vxlan")) {
3341                 return system_add_vxlan(name, link, tb, false);
3342         } else if(!strcmp(str, "vxlan6")) {
3343                 return system_add_vxlan(name, link, tb, true);
3344 #endif
3345 #endif
3346         } else if (!strcmp(str, "ipip")) {
3347                 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3348         }
3349         else
3350                 return -EINVAL;
3351
3352         return 0;
3353 }