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