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  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2
  10  * as published by the Free Software Foundation
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17 #define _GNU_SOURCE
  18
  19 #include <sys/socket.h>
  20 #include <sys/ioctl.h>
  21 #include <sys/stat.h>
  22 #include <sys/syscall.h>
  23
  24 #include <net/if.h>
  25 #include <net/if_arp.h>
  26
  27 #include <arpa/inet.h>
  28 #include <netinet/in.h>
  29
  30 #include <linux/rtnetlink.h>
  31 #include <linux/sockios.h>
  32 #include <linux/ip.h>
  33 #include <linux/if_addr.h>
  34 #include <linux/if_link.h>
  35 #include <linux/if_vlan.h>
  36 #include <linux/if_bridge.h>
  37 #include <linux/if_tunnel.h>
  38 #include <linux/ip6_tunnel.h>
  39 #include <linux/ethtool.h>
  40 #include <linux/fib_rules.h>
  41 #include <linux/version.h>
  42
  43 #ifndef RTN_FAILED_POLICY
  44 #define RTN_FAILED_POLICY 12
  45 #endif
  46
  47 #ifndef RT_TABLE_PRELOCAL
  48 #define RT_TABLE_PRELOCAL 128
  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
  60 #include <string.h>
  61 #include <fcntl.h>
  62 #include <glob.h>
  63 #include <time.h>
  64 #include <unistd.h>
  65
  66 #include <netlink/msg.h>
  67 #include <netlink/attr.h>
  68 #include <netlink/socket.h>
  69 #include <libubox/uloop.h>
  70
  71 #include "netifd.h"
  72 #include "device.h"
  73 #include "system.h"
  74
  75 struct event_socket {
  76         struct uloop_fd uloop;
  77         struct nl_sock *sock;
  78         int bufsize;
  79 };
  80
  81 static int sock_ioctl = -1;
  82 static struct nl_sock *sock_rtnl = NULL;
  83
  84 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
  85 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
  86
  87 static char dev_buf[256];
  88
  89 static void
  90 handler_nl_event(struct uloop_fd *u, unsigned int events)
  91 {
  92         struct event_socket *ev = container_of(u, struct event_socket, uloop);
  93         int err;
  94         socklen_t errlen = sizeof(err);
  95
  96         if (!u->error) {
  97                 nl_recvmsgs_default(ev->sock);
  98                 return;
  99         }
 100
 101         if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
 102                 goto abort;
 103
 104         switch(err) {
 105         case ENOBUFS:
 106                 // Increase rx buffer size on netlink socket
 107                 ev->bufsize *= 2;
 108                 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
 109                         goto abort;
 110
 111                 // Request full dump since some info got dropped
 112                 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
 113                 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
 114                 break;
 115
 116         default:
 117                 goto abort;
 118         }
 119         u->error = false;
 120         return;
 121
 122 abort:
 123         uloop_fd_delete(&ev->uloop);
 124         return;
 125 }
 126
 127 static struct nl_sock *
 128 create_socket(int protocol, int groups)
 129 {
 130         struct nl_sock *sock;
 131
 132         sock = nl_socket_alloc();
 133         if (!sock)
 134                 return NULL;
 135
 136         if (groups)
 137                 nl_join_groups(sock, groups);
 138
 139         if (nl_connect(sock, protocol))
 140                 return NULL;
 141
 142         return sock;
 143 }
 144
 145 static bool
 146 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
 147                         uloop_fd_handler cb, int flags)
 148 {
 149         ev->sock = create_socket(protocol, groups);
 150         if (!ev->sock)
 151                 return false;
 152
 153         ev->uloop.fd = nl_socket_get_fd(ev->sock);
 154         ev->uloop.cb = cb;
 155         if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
 156                 return false;
 157
 158         return true;
 159 }
 160
 161 static bool
 162 create_event_socket(struct event_socket *ev, int protocol,
 163                     int (*cb)(struct nl_msg *msg, void *arg))
 164 {
 165         if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
 166                 return false;
 167
 168         // Install the valid custom callback handler
 169         nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
 170
 171         // Disable sequence number checking on event sockets
 172         nl_socket_disable_seq_check(ev->sock);
 173
 174         // Increase rx buffer size to 65K on event sockets
 175         ev->bufsize = 65535;
 176         if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
 177                 return false;
 178
 179         return true;
 180 }
 181
 182 static bool
 183 system_rtn_aton(const char *src, unsigned int *dst)
 184 {
 185         char *e;
 186         unsigned int n;
 187
 188         if (!strcmp(src, "local"))
 189                 n = RTN_LOCAL;
 190         else if (!strcmp(src, "nat"))
 191                 n = RTN_NAT;
 192         else if (!strcmp(src, "broadcast"))
 193                 n = RTN_BROADCAST;
 194         else if (!strcmp(src, "anycast"))
 195                 n = RTN_ANYCAST;
 196         else if (!strcmp(src, "multicast"))
 197                 n = RTN_MULTICAST;
 198         else if (!strcmp(src, "prohibit"))
 199                 n = RTN_PROHIBIT;
 200         else if (!strcmp(src, "unreachable"))
 201                 n = RTN_UNREACHABLE;
 202         else if (!strcmp(src, "blackhole"))
 203                 n = RTN_BLACKHOLE;
 204         else if (!strcmp(src, "xresolve"))
 205                 n = RTN_XRESOLVE;
 206         else if (!strcmp(src, "unicast"))
 207                 n = RTN_UNICAST;
 208         else if (!strcmp(src, "throw"))
 209                 n = RTN_THROW;
 210         else if (!strcmp(src, "failed_policy"))
 211                 n = RTN_FAILED_POLICY;
 212         else {
 213                 n = strtoul(src, &e, 0);
 214                 if (!e || *e || e == src || n > 255)
 215                         return false;
 216         }
 217
 218         *dst = n;
 219         return true;
 220 }
 221
 222 static bool
 223 system_tos_aton(const char *src, unsigned *dst)
 224 {
 225         char *e;
 226
 227         *dst = strtoul(src, &e, 16);
 228         if (e == src || *e || *dst > 255)
 229                 return false;
 230
 231         return true;
 232 }
 233
 234 int system_init(void)
 235 {
 236         static struct event_socket rtnl_event;
 237         static struct event_socket hotplug_event;
 238
 239         sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
 240         system_fd_set_cloexec(sock_ioctl);
 241
 242         // Prepare socket for routing / address control
 243         sock_rtnl = create_socket(NETLINK_ROUTE, 0);
 244         if (!sock_rtnl)
 245                 return -1;
 246
 247         if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
 248                 return -1;
 249
 250         if (!create_raw_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT, 1,
 251                                      handle_hotplug_event, 0))
 252                 return -1;
 253
 254         // Receive network link events form kernel
 255         nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
 256
 257         return 0;
 258 }
 259
 260 static void system_set_sysctl(const char *path, const char *val)
 261 {
 262         int fd;
 263
 264         fd = open(path, O_WRONLY);
 265         if (fd < 0)
 266                 return;
 267
 268         if (write(fd, val, strlen(val))) {}
 269         close(fd);
 270 }
 271
 272 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
 273 {
 274         snprintf(dev_buf, sizeof(dev_buf), path, device);
 275         system_set_sysctl(dev_buf, val);
 276 }
 277
 278 static void system_set_disable_ipv6(struct device *dev, const char *val)
 279 {
 280         system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
 281 }
 282
 283 static void system_set_rpfilter(struct device *dev, const char *val)
 284 {
 285         system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
 286 }
 287
 288 static void system_set_acceptlocal(struct device *dev, const char *val)
 289 {
 290         system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
 291 }
 292
 293 static void system_set_igmpversion(struct device *dev, const char *val)
 294 {
 295         system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val);
 296 }
 297
 298 static void system_set_mldversion(struct device *dev, const char *val)
 299 {
 300         system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val);
 301 }
 302
 303 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
 304 {
 305         system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val);
 306 }
 307
 308 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
 309 {
 310         system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val);
 311 }
 312
 313 static void system_set_dadtransmits(struct device *dev, const char *val)
 314 {
 315         system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
 316 }
 317
 318 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
 319 {
 320         system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
 321 }
 322
 323 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
 324 {
 325         system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
 326 }
 327
 328 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
 329 {
 330         system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
 331                                        "/sys/class/net/%s/brport/multicast_router",
 332                               dev->ifname, val);
 333 }
 334
 335 static void system_bridge_set_robustness(struct device *dev, const char *val)
 336 {
 337         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
 338                               dev->ifname, val);
 339         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
 340                               dev->ifname, val);
 341 }
 342
 343 static void system_bridge_set_query_interval(struct device *dev, const char *val)
 344 {
 345         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
 346                               dev->ifname, val);
 347 }
 348
 349 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
 350 {
 351         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
 352                               dev->ifname, val);
 353 }
 354
 355 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
 356 {
 357         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
 358                               dev->ifname, val);
 359 }
 360
 361 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
 362 {
 363         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
 364                               dev->ifname, val);
 365 }
 366
 367 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
 368 {
 369         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
 370                               dev->ifname, val);
 371 }
 372
 373 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
 374 {
 375         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
 376                               dev->ifname, val);
 377 }
 378
 379 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
 380 {
 381         int fd = -1, ret = -1;
 382
 383         fd = open(path, O_RDONLY);
 384         if (fd < 0)
 385                 goto out;
 386
 387         ssize_t len = read(fd, buf, buf_sz - 1);
 388         if (len < 0)
 389                 goto out;
 390
 391         ret = buf[len] = 0;
 392
 393 out:
 394         if (fd >= 0)
 395                 close(fd);
 396
 397         return ret;
 398 }
 399
 400 static int
 401 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
 402 {
 403         snprintf(dev_buf, sizeof(dev_buf), path, device);
 404         return system_get_sysctl(dev_buf, buf, buf_sz);
 405 }
 406
 407 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
 408 {
 409         return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
 410                         dev->ifname, buf, buf_sz);
 411 }
 412
 413 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
 414 {
 415         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
 416                         dev->ifname, buf, buf_sz);
 417 }
 418
 419 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
 420 {
 421         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
 422                         dev->ifname, buf, buf_sz);
 423 }
 424
 425 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
 426 {
 427         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
 428                         dev->ifname, buf, buf_sz);
 429 }
 430
 431 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
 432 {
 433         return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
 434                         dev->ifname, buf, buf_sz);
 435 }
 436
 437 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
 438 {
 439         return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
 440                         dev->ifname, buf, buf_sz);
 441 }
 442
 443 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
 444 {
 445         return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
 446                         dev->ifname, buf, buf_sz);
 447 }
 448
 449 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
 450 {
 451         return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
 452                         dev->ifname, buf, buf_sz);
 453 }
 454
 455 // Evaluate netlink messages
 456 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
 457 {
 458         struct nlmsghdr *nh = nlmsg_hdr(msg);
 459         struct nlattr *nla[__IFLA_MAX];
 460         int link_state = 0;
 461         char buf[10];
 462
 463         if (nh->nlmsg_type != RTM_NEWLINK)
 464                 goto out;
 465
 466         nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
 467         if (!nla[IFLA_IFNAME])
 468                 goto out;
 469
 470         struct device *dev = device_get(nla_data(nla[IFLA_IFNAME]), false);
 471         if (!dev)
 472                 goto out;
 473
 474         if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
 475                 link_state = strtoul(buf, NULL, 0);
 476
 477         device_set_link(dev, link_state ? true : false);
 478
 479 out:
 480         return 0;
 481 }
 482
 483 static void
 484 handle_hotplug_msg(char *data, int size)
 485 {
 486         const char *subsystem = NULL, *interface = NULL;
 487         char *cur, *end, *sep;
 488         struct device *dev;
 489         int skip;
 490         bool add;
 491
 492         if (!strncmp(data, "add@", 4))
 493                 add = true;
 494         else if (!strncmp(data, "remove@", 7))
 495                 add = false;
 496         else
 497                 return;
 498
 499         skip = strlen(data) + 1;
 500         end = data + size;
 501
 502         for (cur = data + skip; cur < end; cur += skip) {
 503                 skip = strlen(cur) + 1;
 504
 505                 sep = strchr(cur, '=');
 506                 if (!sep)
 507                         continue;
 508
 509                 *sep = 0;
 510                 if (!strcmp(cur, "INTERFACE"))
 511                         interface = sep + 1;
 512                 else if (!strcmp(cur, "SUBSYSTEM")) {
 513                         subsystem = sep + 1;
 514                         if (strcmp(subsystem, "net") != 0)
 515                                 return;
 516                 }
 517                 if (subsystem && interface)
 518                         goto found;
 519         }
 520         return;
 521
 522 found:
 523         dev = device_get(interface, false);
 524         if (!dev)
 525                 return;
 526
 527         if (dev->type != &simple_device_type)
 528                 return;
 529
 530         if (add && system_if_force_external(dev->ifname))
 531                 return;
 532
 533         device_set_present(dev, add);
 534 }
 535
 536 static void
 537 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
 538 {
 539         struct event_socket *ev = container_of(u, struct event_socket, uloop);
 540         struct sockaddr_nl nla;
 541         unsigned char *buf = NULL;
 542         int size;
 543
 544         while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
 545                 if (nla.nl_pid == 0)
 546                         handle_hotplug_msg((char *) buf, size);
 547
 548                 free(buf);
 549         }
 550 }
 551
 552 static int system_rtnl_call(struct nl_msg *msg)
 553 {
 554         int ret;
 555
 556         ret = nl_send_auto_complete(sock_rtnl, msg);
 557         nlmsg_free(msg);
 558
 559         if (ret < 0)
 560                 return ret;
 561
 562         return nl_wait_for_ack(sock_rtnl);
 563 }
 564
 565 int system_bridge_delbr(struct device *bridge)
 566 {
 567         return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
 568 }
 569
 570 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
 571 {
 572         struct ifreq ifr;
 573
 574         memset(&ifr, 0, sizeof(ifr));
 575         if (dev)
 576                 ifr.ifr_ifindex = dev->ifindex;
 577         else
 578                 ifr.ifr_data = data;
 579         strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name));
 580         return ioctl(sock_ioctl, cmd, &ifr);
 581 }
 582
 583 static bool system_is_bridge(const char *name, char *buf, int buflen)
 584 {
 585         struct stat st;
 586
 587         snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
 588         if (stat(buf, &st) < 0)
 589                 return false;
 590
 591         return true;
 592 }
 593
 594 static char *system_get_bridge(const char *name, char *buf, int buflen)
 595 {
 596         char *path;
 597         ssize_t len = -1;
 598         glob_t gl;
 599
 600         snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
 601         if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
 602                 return NULL;
 603
 604         if (gl.gl_pathc > 0)
 605                 len = readlink(gl.gl_pathv[0], buf, buflen);
 606
 607         globfree(&gl);
 608
 609         if (len < 0)
 610                 return NULL;
 611
 612         buf[len] = 0;
 613         path = strrchr(buf, '/');
 614         if (!path)
 615                 return NULL;
 616
 617         return path + 1;
 618 }
 619
 620 static void
 621 system_bridge_set_wireless(struct device *bridge, struct device *dev)
 622 {
 623         bool mcast_to_ucast = dev->wireless_ap;
 624         bool hairpin = true;
 625
 626         if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
 627             !bridge->settings.multicast_to_unicast)
 628                 mcast_to_ucast = false;
 629
 630         if (!mcast_to_ucast || dev->wireless_isolate)
 631                 hairpin = false;
 632
 633         system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
 634         system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
 635 }
 636
 637 int system_bridge_addif(struct device *bridge, struct device *dev)
 638 {
 639         char buf[64];
 640         char *oldbr;
 641         int ret = 0;
 642
 643         oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
 644         if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
 645                 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
 646
 647         if (dev->wireless)
 648                 system_bridge_set_wireless(bridge, dev);
 649
 650         if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
 651                 snprintf(buf, sizeof(buf), "%i", dev->settings.multicast_router);
 652                 system_bridge_set_multicast_router(dev, buf, false);
 653         }
 654
 655         return ret;
 656 }
 657
 658 int system_bridge_delif(struct device *bridge, struct device *dev)
 659 {
 660         return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
 661 }
 662
 663 int system_if_resolve(struct device *dev)
 664 {
 665         struct ifreq ifr;
 666         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
 667         if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
 668                 return ifr.ifr_ifindex;
 669         else
 670                 return 0;
 671 }
 672
 673 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
 674 {
 675         struct ifreq ifr;
 676
 677         memset(&ifr, 0, sizeof(ifr));
 678         strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
 679         ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr);
 680         ifr.ifr_flags |= add;
 681         ifr.ifr_flags &= ~rem;
 682         return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
 683 }
 684
 685 struct clear_data {
 686         struct nl_msg *msg;
 687         struct device *dev;
 688         int type;
 689         int size;
 690         int af;
 691 };
 692
 693
 694 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
 695 {
 696         struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
 697
 698         return ifa->ifa_index == ifindex;
 699 }
 700
 701 static bool check_route(struct nlmsghdr *hdr, int ifindex)
 702 {
 703         struct rtmsg *r = NLMSG_DATA(hdr);
 704         struct nlattr *tb[__RTA_MAX];
 705
 706         if (r->rtm_protocol == RTPROT_KERNEL &&
 707             r->rtm_family == AF_INET6)
 708                 return false;
 709
 710         nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
 711         if (!tb[RTA_OIF])
 712                 return false;
 713
 714         return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
 715 }
 716
 717 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
 718 {
 719         return true;
 720 }
 721
 722 static int cb_clear_event(struct nl_msg *msg, void *arg)
 723 {
 724         struct clear_data *clr = arg;
 725         struct nlmsghdr *hdr = nlmsg_hdr(msg);
 726         bool (*cb)(struct nlmsghdr *, int ifindex);
 727         int type;
 728
 729         switch(clr->type) {
 730         case RTM_GETADDR:
 731                 type = RTM_DELADDR;
 732                 if (hdr->nlmsg_type != RTM_NEWADDR)
 733                         return NL_SKIP;
 734
 735                 cb = check_ifaddr;
 736                 break;
 737         case RTM_GETROUTE:
 738                 type = RTM_DELROUTE;
 739                 if (hdr->nlmsg_type != RTM_NEWROUTE)
 740                         return NL_SKIP;
 741
 742                 cb = check_route;
 743                 break;
 744         case RTM_GETRULE:
 745                 type = RTM_DELRULE;
 746                 if (hdr->nlmsg_type != RTM_NEWRULE)
 747                         return NL_SKIP;
 748
 749                 cb = check_rule;
 750                 break;
 751         default:
 752                 return NL_SKIP;
 753         }
 754
 755         if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
 756                 return NL_SKIP;
 757
 758         if (type == RTM_DELRULE)
 759                 D(SYSTEM, "Remove a rule\n");
 760         else
 761                 D(SYSTEM, "Remove %s from device %s\n",
 762                   type == RTM_DELADDR ? "an address" : "a route",
 763                   clr->dev->ifname);
 764         memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
 765         hdr = nlmsg_hdr(clr->msg);
 766         hdr->nlmsg_type = type;
 767         hdr->nlmsg_flags = NLM_F_REQUEST;
 768
 769         nl_socket_disable_auto_ack(sock_rtnl);
 770         nl_send_auto_complete(sock_rtnl, clr->msg);
 771         nl_socket_enable_auto_ack(sock_rtnl);
 772
 773         return NL_SKIP;
 774 }
 775
 776 static int
 777 cb_finish_event(struct nl_msg *msg, void *arg)
 778 {
 779         int *pending = arg;
 780         *pending = 0;
 781         return NL_STOP;
 782 }
 783
 784 static int
 785 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
 786 {
 787         int *pending = arg;
 788         *pending = err->error;
 789         return NL_STOP;
 790 }
 791
 792 static void
 793 system_if_clear_entries(struct device *dev, int type, int af)
 794 {
 795         struct clear_data clr;
 796         struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
 797         struct rtmsg rtm = {
 798                 .rtm_family = af,
 799                 .rtm_flags = RTM_F_CLONED,
 800         };
 801         int flags = NLM_F_DUMP;
 802         int pending = 1;
 803
 804         clr.af = af;
 805         clr.dev = dev;
 806         clr.type = type;
 807         switch (type) {
 808         case RTM_GETADDR:
 809         case RTM_GETRULE:
 810                 clr.size = sizeof(struct rtgenmsg);
 811                 break;
 812         case RTM_GETROUTE:
 813                 clr.size = sizeof(struct rtmsg);
 814                 break;
 815         default:
 816                 return;
 817         }
 818
 819         if (!cb)
 820                 return;
 821
 822         clr.msg = nlmsg_alloc_simple(type, flags);
 823         if (!clr.msg)
 824                 goto out;
 825
 826         nlmsg_append(clr.msg, &rtm, clr.size, 0);
 827         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
 828         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
 829         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
 830
 831         nl_send_auto_complete(sock_rtnl, clr.msg);
 832         while (pending > 0)
 833                 nl_recvmsgs(sock_rtnl, cb);
 834
 835         nlmsg_free(clr.msg);
 836 out:
 837         nl_cb_put(cb);
 838 }
 839
 840 /*
 841  * Clear bridge (membership) state and bring down device
 842  */
 843 void system_if_clear_state(struct device *dev)
 844 {
 845         static char buf[256];
 846         char *bridge;
 847
 848         device_set_ifindex(dev, system_if_resolve(dev));
 849         if (dev->external || !dev->ifindex)
 850                 return;
 851
 852         system_if_flags(dev->ifname, 0, IFF_UP);
 853
 854         if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
 855                 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
 856                 system_bridge_delbr(dev);
 857                 return;
 858         }
 859
 860         bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
 861         if (bridge) {
 862                 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
 863                 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
 864         }
 865
 866         system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
 867         system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
 868         system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
 869         system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
 870         system_set_disable_ipv6(dev, "0");
 871 }
 872
 873 static inline unsigned long
 874 sec_to_jiffies(int val)
 875 {
 876         return (unsigned long) val * 100;
 877 }
 878
 879 static void system_bridge_conf_multicast_deps(struct device *bridge,
 880                                               struct bridge_config *cfg,
 881                                               char *buf,
 882                                               int buf_len)
 883 {
 884         int val;
 885
 886         if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
 887             cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
 888             cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
 889                 val = cfg->robustness * cfg->query_interval +
 890                         cfg->query_response_interval;
 891
 892                 snprintf(buf, buf_len, "%i", val);
 893                 system_bridge_set_membership_interval(bridge, buf);
 894
 895                 val = cfg->robustness * cfg->query_interval +
 896                         cfg->query_response_interval / 2;
 897
 898                 snprintf(buf, buf_len, "%i", val);
 899                 system_bridge_set_other_querier_timeout(bridge, buf);
 900         }
 901
 902         if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
 903                 val = cfg->query_interval / 4;
 904
 905                 snprintf(buf, buf_len, "%i", val);
 906                 system_bridge_set_startup_query_interval(bridge, buf);
 907         }
 908 }
 909
 910 static void system_bridge_conf_multicast(struct device *bridge,
 911                                          struct bridge_config *cfg,
 912                                          char *buf,
 913                                          int buf_len)
 914 {
 915         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
 916                 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
 917
 918         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
 919                 bridge->ifname, cfg->multicast_querier ? "1" : "0");
 920
 921         snprintf(buf, buf_len, "%i", cfg->hash_max);
 922         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
 923                 bridge->ifname, buf);
 924
 925         if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
 926                 snprintf(buf, buf_len, "%i", bridge->settings.multicast_router);
 927                 system_bridge_set_multicast_router(bridge, buf, true);
 928         }
 929
 930         if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
 931                 snprintf(buf, buf_len, "%i", cfg->robustness);
 932                 system_bridge_set_robustness(bridge, buf);
 933         }
 934
 935         if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
 936                 snprintf(buf, buf_len, "%i", cfg->query_interval);
 937                 system_bridge_set_query_interval(bridge, buf);
 938         }
 939
 940         if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
 941                 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
 942                 system_bridge_set_query_response_interval(bridge, buf);
 943         }
 944
 945         if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
 946                 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
 947                 system_bridge_set_last_member_interval(bridge, buf);
 948         }
 949
 950         system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
 951 }
 952
 953 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
 954 {
 955         char buf[64];
 956         unsigned long args[4] = {};
 957
 958         if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
 959                 return -1;
 960
 961         args[0] = BRCTL_SET_BRIDGE_STP_STATE;
 962         args[1] = !!cfg->stp;
 963         system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
 964
 965         args[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY;
 966         args[1] = sec_to_jiffies(cfg->forward_delay);
 967         system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
 968
 969         system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
 970
 971         args[0] = BRCTL_SET_BRIDGE_PRIORITY;
 972         args[1] = cfg->priority;
 973         system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
 974
 975         if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
 976                 args[0] = BRCTL_SET_AGEING_TIME;
 977                 args[1] = sec_to_jiffies(cfg->ageing_time);
 978                 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
 979         }
 980
 981         if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
 982                 args[0] = BRCTL_SET_BRIDGE_HELLO_TIME;
 983                 args[1] = sec_to_jiffies(cfg->hello_time);
 984                 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
 985         }
 986
 987         if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
 988                 args[0] = BRCTL_SET_BRIDGE_MAX_AGE;
 989                 args[1] = sec_to_jiffies(cfg->max_age);
 990                 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
 991         }
 992
 993         return 0;
 994 }
 995
 996 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
 997 {
 998         struct nl_msg *msg;
 999         struct nlattr *linkinfo, *data;
1000         struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1001         int i, rv;
1002         static const struct {
1003                 const char *name;
1004                 enum macvlan_mode val;
1005         } modes[] = {
1006                 { "private", MACVLAN_MODE_PRIVATE },
1007                 { "vepa", MACVLAN_MODE_VEPA },
1008                 { "bridge", MACVLAN_MODE_BRIDGE },
1009                 { "passthru", MACVLAN_MODE_PASSTHRU },
1010         };
1011
1012         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1013
1014         if (!msg)
1015                 return -1;
1016
1017         nlmsg_append(msg, &iim, sizeof(iim), 0);
1018
1019         if (cfg->flags & MACVLAN_OPT_MACADDR)
1020                 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1021         nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1022         nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1023
1024         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1025                 goto nla_put_failure;
1026
1027         nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1028
1029         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1030                 goto nla_put_failure;
1031
1032         if (cfg->mode) {
1033                 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1034                         if (strcmp(cfg->mode, modes[i].name) != 0)
1035                                 continue;
1036
1037                         nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1038                         break;
1039                 }
1040         }
1041
1042         nla_nest_end(msg, data);
1043         nla_nest_end(msg, linkinfo);
1044
1045         rv = system_rtnl_call(msg);
1046         if (rv)
1047                 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1048
1049         return rv;
1050
1051 nla_put_failure:
1052         nlmsg_free(msg);
1053         return -ENOMEM;
1054 }
1055
1056 static int system_link_del(const char *ifname)
1057 {
1058         struct nl_msg *msg;
1059         struct ifinfomsg iim = {
1060                 .ifi_family = AF_UNSPEC,
1061                 .ifi_index = 0,
1062         };
1063
1064         msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1065
1066         if (!msg)
1067                 return -1;
1068
1069         nlmsg_append(msg, &iim, sizeof(iim), 0);
1070         nla_put_string(msg, IFLA_IFNAME, ifname);
1071         return system_rtnl_call(msg);
1072 }
1073
1074 int system_macvlan_del(struct device *macvlan)
1075 {
1076         return system_link_del(macvlan->ifname);
1077 }
1078
1079 static int system_vlan(struct device *dev, int id)
1080 {
1081         struct vlan_ioctl_args ifr = {
1082                 .cmd = SET_VLAN_NAME_TYPE_CMD,
1083                 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1084         };
1085
1086         ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1087
1088         if (id < 0) {
1089                 ifr.cmd = DEL_VLAN_CMD;
1090                 ifr.u.VID = 0;
1091         } else {
1092                 ifr.cmd = ADD_VLAN_CMD;
1093                 ifr.u.VID = id;
1094         }
1095         strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1096         return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1097 }
1098
1099 int system_vlan_add(struct device *dev, int id)
1100 {
1101         return system_vlan(dev, id);
1102 }
1103
1104 int system_vlan_del(struct device *dev)
1105 {
1106         return system_vlan(dev, -1);
1107 }
1108
1109 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1110 {
1111         struct nl_msg *msg;
1112         struct nlattr *linkinfo, *data;
1113         struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1114         int rv;
1115
1116         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1117
1118         if (!msg)
1119                 return -1;
1120
1121         nlmsg_append(msg, &iim, sizeof(iim), 0);
1122         nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1123         nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1124
1125         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1126                 goto nla_put_failure;
1127
1128         nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1129
1130         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1131                 goto nla_put_failure;
1132
1133         nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1134
1135 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1136         nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1137 #else
1138         if(cfg->proto == VLAN_PROTO_8021AD)
1139                 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);
1140 #endif
1141
1142         nla_nest_end(msg, data);
1143         nla_nest_end(msg, linkinfo);
1144
1145         rv = system_rtnl_call(msg);
1146         if (rv)
1147                 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1148
1149         return rv;
1150
1151 nla_put_failure:
1152         nlmsg_free(msg);
1153         return -ENOMEM;
1154 }
1155
1156 int system_vlandev_del(struct device *vlandev)
1157 {
1158         return system_link_del(vlandev->ifname);
1159 }
1160
1161 void
1162 system_if_get_settings(struct device *dev, struct device_settings *s)
1163 {
1164         struct ifreq ifr;
1165         char buf[10];
1166
1167         memset(&ifr, 0, sizeof(ifr));
1168         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1169
1170         if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1171                 s->mtu = ifr.ifr_mtu;
1172                 s->flags |= DEV_OPT_MTU;
1173         }
1174
1175         s->mtu6 = system_update_ipv6_mtu(dev, 0);
1176         if (s->mtu6 > 0)
1177                 s->flags |= DEV_OPT_MTU6;
1178
1179         if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1180                 s->txqueuelen = ifr.ifr_qlen;
1181                 s->flags |= DEV_OPT_TXQUEUELEN;
1182         }
1183
1184         if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1185                 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1186                 s->flags |= DEV_OPT_MACADDR;
1187         }
1188
1189         if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1190                 s->ipv6 = !strtoul(buf, NULL, 0);
1191                 s->flags |= DEV_OPT_IPV6;
1192         }
1193
1194         if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1195                 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1196                 s->flags |= DEV_OPT_PROMISC;
1197
1198                 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1199                 s->flags |= DEV_OPT_MULTICAST;
1200         }
1201
1202         if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1203                 s->rpfilter = strtoul(buf, NULL, 0);
1204                 s->flags |= DEV_OPT_RPFILTER;
1205         }
1206
1207         if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1208                 s->acceptlocal = strtoul(buf, NULL, 0);
1209                 s->flags |= DEV_OPT_ACCEPTLOCAL;
1210         }
1211
1212         if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1213                 s->igmpversion = strtoul(buf, NULL, 0);
1214                 s->flags |= DEV_OPT_IGMPVERSION;
1215         }
1216
1217         if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1218                 s->mldversion = strtoul(buf, NULL, 0);
1219                 s->flags |= DEV_OPT_MLDVERSION;
1220         }
1221
1222         if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1223                 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1224                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1225         }
1226
1227         if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1228                 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1229                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1230         }
1231
1232         if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1233                 s->dadtransmits = strtoul(buf, NULL, 0);
1234                 s->flags |= DEV_OPT_DADTRANSMITS;
1235         }
1236 }
1237
1238 static void
1239 system_if_set_rps_xps_val(const char *path, int val)
1240 {
1241         char val_buf[8];
1242         glob_t gl;
1243         int i;
1244
1245         if (glob(path, 0, NULL, &gl))
1246                 return;
1247
1248         snprintf(val_buf, sizeof(val_buf), "%x", val);
1249         for (i = 0; i < gl.gl_pathc; i++)
1250                 system_set_sysctl(gl.gl_pathv[i], val_buf);
1251
1252         globfree(&gl);
1253 }
1254
1255 static void
1256 system_if_apply_rps_xps(struct device *dev, struct device_settings *s)
1257 {
1258         long n_cpus = sysconf(_SC_NPROCESSORS_ONLN);
1259         int val;
1260
1261         if (n_cpus < 2)
1262                 return;
1263
1264         val = (1 << n_cpus) - 1;
1265         snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/rps_cpus", dev->ifname);
1266         system_if_set_rps_xps_val(dev_buf, s->rps ? val : 0);
1267
1268         snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/xps_cpus", dev->ifname);
1269         system_if_set_rps_xps_val(dev_buf, s->xps ? val : 0);
1270 }
1271
1272 void
1273 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1274 {
1275         struct ifreq ifr;
1276         char buf[12];
1277
1278         memset(&ifr, 0, sizeof(ifr));
1279         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1280         if (s->flags & DEV_OPT_MTU & apply_mask) {
1281                 ifr.ifr_mtu = s->mtu;
1282                 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1283                         s->flags &= ~DEV_OPT_MTU;
1284         }
1285         if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1286                 system_update_ipv6_mtu(dev, s->mtu6);
1287         }
1288         if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1289                 ifr.ifr_qlen = s->txqueuelen;
1290                 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1291                         s->flags &= ~DEV_OPT_TXQUEUELEN;
1292         }
1293         if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1294                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1295                 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1296                 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1297                         s->flags &= ~DEV_OPT_MACADDR;
1298         }
1299         if (s->flags & DEV_OPT_IPV6 & apply_mask)
1300                 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1301         if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1302                 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1303                                     !s->promisc ? IFF_PROMISC : 0) < 0)
1304                         s->flags &= ~DEV_OPT_PROMISC;
1305         }
1306         if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1307                 snprintf(buf, sizeof(buf), "%d", s->rpfilter);
1308                 system_set_rpfilter(dev, buf);
1309         }
1310         if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1311                 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1312         if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1313                 snprintf(buf, sizeof(buf), "%d", s->igmpversion);
1314                 system_set_igmpversion(dev, buf);
1315         }
1316         if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1317                 snprintf(buf, sizeof(buf), "%d", s->mldversion);
1318                 system_set_mldversion(dev, buf);
1319         }
1320         if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1321                 snprintf(buf, sizeof(buf), "%d", s->neigh4reachabletime);
1322                 system_set_neigh4reachabletime(dev, buf);
1323                 snprintf(buf, sizeof(buf), "%d", s->neigh6reachabletime);
1324                 system_set_neigh6reachabletime(dev, buf);
1325         }
1326         if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1327                 snprintf(buf, sizeof(buf), "%d", s->dadtransmits);
1328                 system_set_dadtransmits(dev, buf);
1329         }
1330         if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1331                 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1332                                     !s->multicast ? IFF_MULTICAST : 0) < 0)
1333                         s->flags &= ~DEV_OPT_MULTICAST;
1334         }
1335
1336         system_if_apply_rps_xps(dev, s);
1337 }
1338
1339 int system_if_up(struct device *dev)
1340 {
1341         system_if_get_settings(dev, &dev->orig_settings);
1342         /* Only keep orig settings based on what needs to be set */
1343         dev->orig_settings.valid_flags = dev->orig_settings.flags;
1344         dev->orig_settings.flags &= dev->settings.flags;
1345         system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1346         return system_if_flags(dev->ifname, IFF_UP, 0);
1347 }
1348
1349 int system_if_down(struct device *dev)
1350 {
1351         int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1352         system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1353         return ret;
1354 }
1355
1356 struct if_check_data {
1357         struct device *dev;
1358         int pending;
1359         int ret;
1360 };
1361
1362 #ifndef IFF_LOWER_UP
1363 #define IFF_LOWER_UP    0x10000
1364 #endif
1365
1366 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1367 {
1368         struct nlmsghdr *nh = nlmsg_hdr(msg);
1369         struct ifinfomsg *ifi = NLMSG_DATA(nh);
1370         struct if_check_data *chk = (struct if_check_data *)arg;
1371
1372         if (nh->nlmsg_type != RTM_NEWLINK)
1373                 return NL_SKIP;
1374
1375         device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1376         device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1377
1378         return NL_OK;
1379 }
1380
1381 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1382 {
1383         struct if_check_data *chk = (struct if_check_data *)arg;
1384         chk->pending = 0;
1385         return NL_STOP;
1386 }
1387
1388 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1389 {
1390         struct if_check_data *chk = (struct if_check_data *)arg;
1391
1392         device_set_present(chk->dev, false);
1393         device_set_link(chk->dev, false);
1394         chk->pending = err->error;
1395
1396         return NL_STOP;
1397 }
1398
1399 int system_if_check(struct device *dev)
1400 {
1401         struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1402         struct nl_msg *msg;
1403         struct ifinfomsg ifi = {
1404                 .ifi_family = AF_UNSPEC,
1405                 .ifi_index = 0,
1406         };
1407         struct if_check_data chk = {
1408                 .dev = dev,
1409                 .pending = 1,
1410         };
1411         int ret = 1;
1412
1413         msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1414         if (!msg)
1415                 goto out;
1416
1417         if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1418             nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1419                 goto free;
1420
1421         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1422         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1423         nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1424
1425         nl_send_auto_complete(sock_rtnl, msg);
1426         while (chk.pending > 0)
1427                 nl_recvmsgs(sock_rtnl, cb);
1428
1429         ret = chk.pending;
1430
1431 free:
1432         nlmsg_free(msg);
1433 out:
1434         nl_cb_put(cb);
1435         return ret;
1436 }
1437
1438 struct device *
1439 system_if_get_parent(struct device *dev)
1440 {
1441         char buf[64], *devname;
1442         int ifindex, iflink, len;
1443         FILE *f;
1444
1445         snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1446         f = fopen(buf, "r");
1447         if (!f)
1448                 return NULL;
1449
1450         len = fread(buf, 1, sizeof(buf) - 1, f);
1451         fclose(f);
1452
1453         if (len <= 0)
1454                 return NULL;
1455
1456         buf[len] = 0;
1457         iflink = strtoul(buf, NULL, 0);
1458         ifindex = system_if_resolve(dev);
1459         if (!iflink || iflink == ifindex)
1460                 return NULL;
1461
1462         devname = if_indextoname(iflink, buf);
1463         if (!devname)
1464                 return NULL;
1465
1466         return device_get(devname, true);
1467 }
1468
1469 static bool
1470 read_string_file(int dir_fd, const char *file, char *buf, int len)
1471 {
1472         bool ret = false;
1473         char *c;
1474         int fd;
1475
1476         fd = openat(dir_fd, file, O_RDONLY);
1477         if (fd < 0)
1478                 return false;
1479
1480 retry:
1481         len = read(fd, buf, len - 1);
1482         if (len < 0) {
1483                 if (errno == EINTR)
1484                         goto retry;
1485         } else if (len > 0) {
1486                         buf[len] = 0;
1487
1488                         c = strchr(buf, '\n');
1489                         if (c)
1490                                 *c = 0;
1491
1492                         ret = true;
1493         }
1494
1495         close(fd);
1496
1497         return ret;
1498 }
1499
1500 static bool
1501 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1502 {
1503         char buf[64];
1504         bool ret = false;
1505
1506         ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1507         if (ret)
1508                 *val = strtoull(buf, NULL, 0);
1509
1510         return ret;
1511 }
1512
1513 /* Assume advertised flags == supported flags */
1514 static const struct {
1515         uint32_t mask;
1516         const char *name;
1517 } ethtool_link_modes[] = {
1518         { ADVERTISED_10baseT_Half, "10H" },
1519         { ADVERTISED_10baseT_Full, "10F" },
1520         { ADVERTISED_100baseT_Half, "100H" },
1521         { ADVERTISED_100baseT_Full, "100F" },
1522         { ADVERTISED_1000baseT_Half, "1000H" },
1523         { ADVERTISED_1000baseT_Full, "1000F" },
1524 };
1525
1526 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1527 {
1528         int i;
1529         for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1530                 if (mask & ethtool_link_modes[i].mask)
1531                         blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1532         }
1533 }
1534
1535 bool
1536 system_if_force_external(const char *ifname)
1537 {
1538         char buf[64];
1539         struct stat s;
1540
1541         snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1542         return stat(buf, &s) == 0;
1543 }
1544
1545 int
1546 system_if_dump_info(struct device *dev, struct blob_buf *b)
1547 {
1548         struct ethtool_cmd ecmd;
1549         struct ifreq ifr;
1550         char buf[64], *s;
1551         void *c;
1552         int dir_fd;
1553
1554         snprintf(buf, sizeof(buf), "/sys/class/net/%s", dev->ifname);
1555         dir_fd = open(buf, O_DIRECTORY);
1556
1557         memset(&ecmd, 0, sizeof(ecmd));
1558         memset(&ifr, 0, sizeof(ifr));
1559         strcpy(ifr.ifr_name, dev->ifname);
1560         ifr.ifr_data = (caddr_t) &ecmd;
1561         ecmd.cmd = ETHTOOL_GSET;
1562
1563         if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1564                 c = blobmsg_open_array(b, "link-advertising");
1565                 system_add_link_modes(b, ecmd.advertising);
1566                 blobmsg_close_array(b, c);
1567
1568                 c = blobmsg_open_array(b, "link-supported");
1569                 system_add_link_modes(b, ecmd.supported);
1570                 blobmsg_close_array(b, c);
1571
1572                 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1573                 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1574                         ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1575                 blobmsg_add_string_buffer(b);
1576         }
1577
1578         close(dir_fd);
1579         return 0;
1580 }
1581
1582 int
1583 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1584 {
1585         const char *const counters[] = {
1586                 "collisions",     "rx_frame_errors",   "tx_compressed",
1587                 "multicast",      "rx_length_errors",  "tx_dropped",
1588                 "rx_bytes",       "rx_missed_errors",  "tx_errors",
1589                 "rx_compressed",  "rx_over_errors",    "tx_fifo_errors",
1590                 "rx_crc_errors",  "rx_packets",        "tx_heartbeat_errors",
1591                 "rx_dropped",     "tx_aborted_errors", "tx_packets",
1592                 "rx_errors",      "tx_bytes",          "tx_window_errors",
1593                 "rx_fifo_errors", "tx_carrier_errors",
1594         };
1595         char buf[64];
1596         int stats_dir;
1597         int i;
1598         uint64_t val = 0;
1599
1600         snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1601         stats_dir = open(buf, O_DIRECTORY);
1602         if (stats_dir < 0)
1603                 return -1;
1604
1605         for (i = 0; i < ARRAY_SIZE(counters); i++)
1606                 if (read_uint64_file(stats_dir, counters[i], &val))
1607                         blobmsg_add_u64(b, counters[i], val);
1608
1609         close(stats_dir);
1610         return 0;
1611 }
1612
1613 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1614 {
1615         bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1616         int alen = v4 ? 4 : 16;
1617         unsigned int flags = 0;
1618         struct ifaddrmsg ifa = {
1619                 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1620                 .ifa_prefixlen = addr->mask,
1621                 .ifa_index = dev->ifindex,
1622         };
1623
1624         struct nl_msg *msg;
1625         if (cmd == RTM_NEWADDR)
1626                 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1627
1628         msg = nlmsg_alloc_simple(cmd, flags);
1629         if (!msg)
1630                 return -1;
1631
1632         nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1633         nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1634         if (v4) {
1635                 if (addr->broadcast)
1636                         nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1637                 if (addr->point_to_point)
1638                         nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1639         } else {
1640                 time_t now = system_get_rtime();
1641                 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1642
1643                 if (addr->preferred_until) {
1644                         int64_t preferred = addr->preferred_until - now;
1645                         if (preferred < 0)
1646                                 preferred = 0;
1647                         else if (preferred > UINT32_MAX)
1648                                 preferred = UINT32_MAX;
1649
1650                         cinfo.ifa_prefered = preferred;
1651                 }
1652
1653                 if (addr->valid_until) {
1654                         int64_t valid = addr->valid_until - now;
1655                         if (valid <= 0) {
1656                                 nlmsg_free(msg);
1657                                 return -1;
1658                         }
1659                         else if (valid > UINT32_MAX)
1660                                 valid = UINT32_MAX;
1661
1662                         cinfo.ifa_valid = valid;
1663                 }
1664
1665                 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1666
1667                 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1668                         nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1669         }
1670
1671         return system_rtnl_call(msg);
1672 }
1673
1674 int system_add_address(struct device *dev, struct device_addr *addr)
1675 {
1676         return system_addr(dev, addr, RTM_NEWADDR);
1677 }
1678
1679 int system_del_address(struct device *dev, struct device_addr *addr)
1680 {
1681         return system_addr(dev, addr, RTM_DELADDR);
1682 }
1683
1684 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1685 {
1686         int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1687         bool have_gw;
1688         unsigned int flags = 0;
1689
1690         if (alen == 4)
1691                 have_gw = !!route->nexthop.in.s_addr;
1692         else
1693                 have_gw = route->nexthop.in6.s6_addr32[0] ||
1694                         route->nexthop.in6.s6_addr32[1] ||
1695                         route->nexthop.in6.s6_addr32[2] ||
1696                         route->nexthop.in6.s6_addr32[3];
1697
1698         unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
1699                         ? route->table : RT_TABLE_MAIN;
1700
1701         struct rtmsg rtm = {
1702                 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1703                 .rtm_dst_len = route->mask,
1704                 .rtm_src_len = route->sourcemask,
1705                 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
1706                 .rtm_protocol = (route->flags & DEVADDR_KERNEL) ? RTPROT_KERNEL : RTPROT_STATIC,
1707                 .rtm_scope = RT_SCOPE_NOWHERE,
1708                 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
1709                 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
1710         };
1711         struct nl_msg *msg;
1712
1713         if (cmd == RTM_NEWROUTE) {
1714                 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1715
1716                 if (!dev) { // Add null-route
1717                         rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1718                         rtm.rtm_type = RTN_UNREACHABLE;
1719                 }
1720                 else
1721                         rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
1722         }
1723
1724         if (route->flags & DEVROUTE_TYPE) {
1725                 rtm.rtm_type = route->type;
1726                 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
1727                         if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
1728                             rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
1729                                 rtm.rtm_table = RT_TABLE_LOCAL;
1730                 }
1731
1732                 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
1733                         rtm.rtm_scope = RT_SCOPE_HOST;
1734                 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
1735                                 rtm.rtm_type == RTN_ANYCAST) {
1736                         rtm.rtm_scope = RT_SCOPE_LINK;
1737                 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
1738                                 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY) {
1739                         rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1740                         dev = NULL;
1741                 }
1742         }
1743
1744         msg = nlmsg_alloc_simple(cmd, flags);
1745         if (!msg)
1746                 return -1;
1747
1748         nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1749
1750         if (route->mask)
1751                 nla_put(msg, RTA_DST, alen, &route->addr);
1752
1753         if (route->sourcemask) {
1754                 if (rtm.rtm_family == AF_INET)
1755                         nla_put(msg, RTA_PREFSRC, alen, &route->source);
1756                 else
1757                         nla_put(msg, RTA_SRC, alen, &route->source);
1758         }
1759
1760         if (route->metric > 0)
1761                 nla_put_u32(msg, RTA_PRIORITY, route->metric);
1762
1763         if (have_gw)
1764                 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
1765
1766         if (dev)
1767                 nla_put_u32(msg, RTA_OIF, dev->ifindex);
1768
1769         if (table >= 256)
1770                 nla_put_u32(msg, RTA_TABLE, table);
1771
1772         if (route->flags & DEVROUTE_MTU) {
1773                 struct nlattr *metrics;
1774
1775                 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
1776                         goto nla_put_failure;
1777
1778                 nla_put_u32(msg, RTAX_MTU, route->mtu);
1779
1780                 nla_nest_end(msg, metrics);
1781         }
1782
1783         return system_rtnl_call(msg);
1784
1785 nla_put_failure:
1786         nlmsg_free(msg);
1787         return -ENOMEM;
1788 }
1789
1790 int system_add_route(struct device *dev, struct device_route *route)
1791 {
1792         return system_rt(dev, route, RTM_NEWROUTE);
1793 }
1794
1795 int system_del_route(struct device *dev, struct device_route *route)
1796 {
1797         return system_rt(dev, route, RTM_DELROUTE);
1798 }
1799
1800 int system_flush_routes(void)
1801 {
1802         const char *names[] = {
1803                 "/proc/sys/net/ipv4/route/flush",
1804                 "/proc/sys/net/ipv6/route/flush"
1805         };
1806         int fd, i;
1807
1808         for (i = 0; i < ARRAY_SIZE(names); i++) {
1809                 fd = open(names[i], O_WRONLY);
1810                 if (fd < 0)
1811                         continue;
1812
1813                 if (write(fd, "-1", 2)) {}
1814                 close(fd);
1815         }
1816         return 0;
1817 }
1818
1819 bool system_resolve_rt_type(const char *type, unsigned int *id)
1820 {
1821         return system_rtn_aton(type, id);
1822 }
1823
1824 bool system_resolve_rt_table(const char *name, unsigned int *id)
1825 {
1826         FILE *f;
1827         char *e, buf[128];
1828         unsigned int n, table = RT_TABLE_UNSPEC;
1829
1830         /* first try to parse table as number */
1831         if ((n = strtoul(name, &e, 0)) > 0 && !*e)
1832                 table = n;
1833
1834         /* handle well known aliases */
1835         else if (!strcmp(name, "default"))
1836                 table = RT_TABLE_DEFAULT;
1837         else if (!strcmp(name, "main"))
1838                 table = RT_TABLE_MAIN;
1839         else if (!strcmp(name, "local"))
1840                 table = RT_TABLE_LOCAL;
1841         else if (!strcmp(name, "prelocal"))
1842                 table = RT_TABLE_PRELOCAL;
1843
1844         /* try to look up name in /etc/iproute2/rt_tables */
1845         else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
1846         {
1847                 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
1848                 {
1849                         if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
1850                                 continue;
1851
1852                         n = strtoul(e, NULL, 10);
1853                         e = strtok(NULL, " \t\n");
1854
1855                         if (e && !strcmp(e, name))
1856                         {
1857                                 table = n;
1858                                 break;
1859                         }
1860                 }
1861
1862                 fclose(f);
1863         }
1864
1865         if (table == RT_TABLE_UNSPEC)
1866                 return false;
1867
1868         *id = table;
1869         return true;
1870 }
1871
1872 bool system_is_default_rt_table(unsigned int id)
1873 {
1874         return (id == RT_TABLE_MAIN);
1875 }
1876
1877 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
1878 {
1879         char *e;
1880         unsigned int n;
1881
1882         if (!strcmp(filter, "strict"))
1883                 n = 1;
1884         else if (!strcmp(filter, "loose"))
1885                 n = 2;
1886         else {
1887                 n = strtoul(filter, &e, 0);
1888                 if (*e || e == filter || n > 2)
1889                         return false;
1890         }
1891
1892         *id = n;
1893         return true;
1894 }
1895
1896 static int system_iprule(struct iprule *rule, int cmd)
1897 {
1898         int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
1899
1900         struct nl_msg *msg;
1901         struct rtmsg rtm = {
1902                 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1903                 .rtm_protocol = RTPROT_STATIC,
1904                 .rtm_scope = RT_SCOPE_UNIVERSE,
1905                 .rtm_table = RT_TABLE_UNSPEC,
1906                 .rtm_type = RTN_UNSPEC,
1907                 .rtm_flags = 0,
1908         };
1909
1910         if (cmd == RTM_NEWRULE)
1911                 rtm.rtm_type = RTN_UNICAST;
1912
1913         if (rule->invert)
1914                 rtm.rtm_flags |= FIB_RULE_INVERT;
1915
1916         if (rule->flags & IPRULE_SRC)
1917                 rtm.rtm_src_len = rule->src_mask;
1918
1919         if (rule->flags & IPRULE_DEST)
1920                 rtm.rtm_dst_len = rule->dest_mask;
1921
1922         if (rule->flags & IPRULE_TOS)
1923                 rtm.rtm_tos = rule->tos;
1924
1925         if (rule->flags & IPRULE_LOOKUP) {
1926                 if (rule->lookup < 256)
1927                         rtm.rtm_table = rule->lookup;
1928         }
1929
1930         if (rule->flags & IPRULE_ACTION)
1931                 rtm.rtm_type = rule->action;
1932         else if (rule->flags & IPRULE_GOTO)
1933                 rtm.rtm_type = FR_ACT_GOTO;
1934         else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
1935                 rtm.rtm_type = FR_ACT_NOP;
1936
1937         msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
1938
1939         if (!msg)
1940                 return -1;
1941
1942         nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1943
1944         if (rule->flags & IPRULE_IN)
1945                 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
1946
1947         if (rule->flags & IPRULE_OUT)
1948                 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
1949
1950         if (rule->flags & IPRULE_SRC)
1951                 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
1952
1953         if (rule->flags & IPRULE_DEST)
1954                 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
1955
1956         if (rule->flags & IPRULE_PRIORITY)
1957                 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
1958         else if (cmd == RTM_NEWRULE)
1959                 nla_put_u32(msg, FRA_PRIORITY, rule->order);
1960
1961         if (rule->flags & IPRULE_FWMARK)
1962                 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
1963
1964         if (rule->flags & IPRULE_FWMASK)
1965                 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
1966
1967         if (rule->flags & IPRULE_LOOKUP) {
1968                 if (rule->lookup >= 256)
1969                         nla_put_u32(msg, FRA_TABLE, rule->lookup);
1970         }
1971
1972         if (rule->flags & IPRULE_GOTO)
1973                 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
1974
1975         return system_rtnl_call(msg);
1976 }
1977
1978 int system_add_iprule(struct iprule *rule)
1979 {
1980         return system_iprule(rule, RTM_NEWRULE);
1981 }
1982
1983 int system_del_iprule(struct iprule *rule)
1984 {
1985         return system_iprule(rule, RTM_DELRULE);
1986 }
1987
1988 int system_flush_iprules(void)
1989 {
1990         int rv = 0;
1991         struct iprule rule;
1992
1993         system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
1994         system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
1995
1996         memset(&rule, 0, sizeof(rule));
1997
1998
1999         rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2000
2001         rule.priority = 0;
2002         rule.lookup = RT_TABLE_PRELOCAL;
2003         rv |= system_iprule(&rule, RTM_NEWRULE);
2004
2005         rule.priority = 1;
2006         rule.lookup = RT_TABLE_LOCAL;
2007         rv |= system_iprule(&rule, RTM_NEWRULE);
2008
2009         rule.priority = 32766;
2010         rule.lookup = RT_TABLE_MAIN;
2011         rv |= system_iprule(&rule, RTM_NEWRULE);
2012
2013         rule.priority = 32767;
2014         rule.lookup = RT_TABLE_DEFAULT;
2015         rv |= system_iprule(&rule, RTM_NEWRULE);
2016
2017
2018         rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2019
2020         rule.priority = 0;
2021         rule.lookup = RT_TABLE_PRELOCAL;
2022         rv |= system_iprule(&rule, RTM_NEWRULE);
2023
2024         rule.priority = 1;
2025         rule.lookup = RT_TABLE_LOCAL;
2026         rv |= system_iprule(&rule, RTM_NEWRULE);
2027
2028         rule.priority = 32766;
2029         rule.lookup = RT_TABLE_MAIN;
2030         rv |= system_iprule(&rule, RTM_NEWRULE);
2031
2032         return rv;
2033 }
2034
2035 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2036 {
2037         return system_rtn_aton(action, id);
2038 }
2039
2040 time_t system_get_rtime(void)
2041 {
2042         struct timespec ts;
2043         struct timeval tv;
2044
2045         if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2046                 return ts.tv_sec;
2047
2048         if (gettimeofday(&tv, NULL) == 0)
2049                 return tv.tv_sec;
2050
2051         return 0;
2052 }
2053
2054 #ifndef IP_DF
2055 #define IP_DF       0x4000
2056 #endif
2057
2058 static int tunnel_ioctl(const char *name, int cmd, void *p)
2059 {
2060         struct ifreq ifr;
2061
2062         memset(&ifr, 0, sizeof(ifr));
2063         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
2064         ifr.ifr_ifru.ifru_data = p;
2065         return ioctl(sock_ioctl, cmd, &ifr);
2066 }
2067
2068 #ifdef IFLA_IPTUN_MAX
2069 #define IP6_FLOWINFO_TCLASS     htonl(0x0FF00000)
2070 static int system_add_gre_tunnel(const char *name, const char *kind,
2071                                  const unsigned int link, struct blob_attr **tb, bool v6)
2072 {
2073         struct nl_msg *nlm;
2074         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2075         struct blob_attr *cur;
2076         uint32_t ikey = 0, okey = 0, flags = 0, flowinfo = 0;
2077         uint16_t iflags = 0, oflags = 0;
2078         uint8_t tos = 0;
2079         int ret = 0, ttl = 64;
2080
2081         nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2082         if (!nlm)
2083                 return -1;
2084
2085         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2086         nla_put_string(nlm, IFLA_IFNAME, name);
2087
2088         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2089         if (!linkinfo) {
2090                 ret = -ENOMEM;
2091                 goto failure;
2092         }
2093
2094         nla_put_string(nlm, IFLA_INFO_KIND, kind);
2095         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2096         if (!infodata) {
2097                 ret = -ENOMEM;
2098                 goto failure;
2099         }
2100
2101         if (link)
2102                 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2103
2104         if ((cur = tb[TUNNEL_ATTR_TTL]))
2105                 ttl = blobmsg_get_u32(cur);
2106
2107         nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2108
2109         if ((cur = tb[TUNNEL_ATTR_TOS])) {
2110                 char *str = blobmsg_get_string(cur);
2111                 if (strcmp(str, "inherit")) {
2112                         unsigned uval;
2113
2114                         if (!system_tos_aton(str, &uval)) {
2115                                 ret = -EINVAL;
2116                                 goto failure;
2117                         }
2118
2119                         if (v6)
2120                                 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2121                         else
2122                                 tos = uval;
2123                 } else {
2124                         if (v6)
2125                                 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
2126                         else
2127                                 tos = 1;
2128                 }
2129         }
2130
2131         if ((cur = tb[TUNNEL_ATTR_INFO]) && (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)) {
2132                 uint8_t icsum, ocsum, iseqno, oseqno;
2133                 if (sscanf(blobmsg_get_string(cur), "%u,%u,%hhu,%hhu,%hhu,%hhu",
2134                         &ikey, &okey, &icsum, &ocsum, &iseqno, &oseqno) < 6) {
2135                         ret = -EINVAL;
2136                         goto failure;
2137                 }
2138
2139                 if (ikey)
2140                         iflags |= GRE_KEY;
2141
2142                 if (okey)
2143                         oflags |= GRE_KEY;
2144
2145                 if (icsum)
2146                         iflags |= GRE_CSUM;
2147
2148                 if (ocsum)
2149                         oflags |= GRE_CSUM;
2150
2151                 if (iseqno)
2152                         iflags |= GRE_SEQ;
2153
2154                 if (oseqno)
2155                         oflags |= GRE_SEQ;
2156         }
2157
2158         if (v6) {
2159                 struct in6_addr in6buf;
2160                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2161                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2162                                 ret = -EINVAL;
2163                                 goto failure;
2164                         }
2165                         nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2166                 }
2167
2168                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2169                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2170                                 ret = -EINVAL;
2171                                 goto failure;
2172                         }
2173                         nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2174                 }
2175                 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, 4);
2176
2177                 if (flowinfo)
2178                         nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2179
2180                 if (flags)
2181                         nla_put_u32(nlm, IFLA_GRE_FLAGS, flags);
2182         } else {
2183                 struct in_addr inbuf;
2184                 bool set_df = true;
2185
2186                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2187                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2188                                 ret = -EINVAL;
2189                                 goto failure;
2190                         }
2191                         nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2192                 }
2193
2194                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2195                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2196                                 ret = -EINVAL;
2197                                 goto failure;
2198                         }
2199                         nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2200
2201                         if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2202                                 if (!okey) {
2203                                         okey = inbuf.s_addr;
2204                                         oflags |= GRE_KEY;
2205                                 }
2206
2207                                 if (!ikey) {
2208                                         ikey = inbuf.s_addr;
2209                                         iflags |= GRE_KEY;
2210                                 }
2211                         }
2212                 }
2213
2214                 if ((cur = tb[TUNNEL_ATTR_DF]))
2215                         set_df = blobmsg_get_bool(cur);
2216
2217                 /* ttl !=0 and nopmtudisc are incompatible */
2218                 if (ttl && !set_df) {
2219                         ret = -EINVAL;
2220                         goto failure;
2221                 }
2222
2223                 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2224
2225                 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2226         }
2227
2228         if (oflags)
2229                 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2230
2231         if (iflags)
2232                 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2233
2234         if (okey)
2235                 nla_put_u32(nlm, IFLA_GRE_OKEY, okey);
2236
2237         if (ikey)
2238                 nla_put_u32(nlm, IFLA_GRE_IKEY, ikey);
2239
2240         nla_nest_end(nlm, infodata);
2241         nla_nest_end(nlm, linkinfo);
2242
2243         return system_rtnl_call(nlm);
2244
2245 failure:
2246         nlmsg_free(nlm);
2247         return ret;
2248 }
2249 #endif
2250
2251 #ifdef IFLA_VTI_MAX
2252 static int system_add_vti_tunnel(const char *name, const char *kind,
2253                                  const unsigned int link, struct blob_attr **tb, bool v6)
2254 {
2255         struct nl_msg *nlm;
2256         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2257         struct blob_attr *cur;
2258         uint32_t ikey = 0, okey = 0;
2259         int ret = 0;
2260
2261         nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2262         if (!nlm)
2263                 return -1;
2264
2265         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2266         nla_put_string(nlm, IFLA_IFNAME, name);
2267
2268         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2269         if (!linkinfo) {
2270                 ret = -ENOMEM;
2271                 goto failure;
2272         }
2273
2274         nla_put_string(nlm, IFLA_INFO_KIND, kind);
2275         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2276         if (!infodata) {
2277                 ret = -ENOMEM;
2278                 goto failure;
2279         }
2280
2281         if (link)
2282                 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2283
2284         if ((cur = tb[TUNNEL_ATTR_INFO]) && (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)) {
2285                 if (sscanf(blobmsg_get_string(cur), "%u,%u",
2286                         &ikey, &okey) < 2) {
2287                         ret = -EINVAL;
2288                         goto failure;
2289                 }
2290         }
2291
2292         if (v6) {
2293                 struct in6_addr in6buf;
2294                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2295                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2296                                 ret = -EINVAL;
2297                                 goto failure;
2298                         }
2299                         nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2300                 }
2301
2302                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2303                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2304                                 ret = -EINVAL;
2305                                 goto failure;
2306                         }
2307                         nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2308                 }
2309
2310         } else {
2311                 struct in_addr inbuf;
2312
2313                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2314                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2315                                 ret = -EINVAL;
2316                                 goto failure;
2317                         }
2318                         nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2319                 }
2320
2321                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2322                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2323                                 ret = -EINVAL;
2324                                 goto failure;
2325                         }
2326                         nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2327                 }
2328
2329         }
2330
2331         if (okey)
2332                 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2333
2334         if (ikey)
2335                 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2336
2337         nla_nest_end(nlm, infodata);
2338         nla_nest_end(nlm, linkinfo);
2339
2340         return system_rtnl_call(nlm);
2341
2342 failure:
2343         nlmsg_free(nlm);
2344         return ret;
2345 }
2346 #endif
2347
2348 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
2349 {
2350         struct blob_attr *cur;
2351         bool set_df = true;
2352         struct ip_tunnel_parm p  = {
2353                 .link = link,
2354                 .iph = {
2355                         .version = 4,
2356                         .ihl = 5,
2357                         .protocol = proto,
2358                 }
2359         };
2360
2361         if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
2362                         inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
2363                 return -EINVAL;
2364
2365         if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
2366                         inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
2367                 return -EINVAL;
2368
2369         if ((cur = tb[TUNNEL_ATTR_DF]))
2370                 set_df = blobmsg_get_bool(cur);
2371
2372         if ((cur = tb[TUNNEL_ATTR_TTL]))
2373                 p.iph.ttl = blobmsg_get_u32(cur);
2374
2375         if ((cur = tb[TUNNEL_ATTR_TOS])) {
2376                 char *str = blobmsg_get_string(cur);
2377                 if (strcmp(str, "inherit")) {
2378                         unsigned uval;
2379
2380                         if (!system_tos_aton(str, &uval))
2381                                 return -EINVAL;
2382
2383                         p.iph.tos = uval;
2384                 } else
2385                         p.iph.tos = 1;
2386         }
2387
2388         p.iph.frag_off = set_df ? htons(IP_DF) : 0;
2389         /* ttl !=0 and nopmtudisc are incompatible */
2390         if (p.iph.ttl && p.iph.frag_off == 0)
2391                 return -EINVAL;
2392
2393         strncpy(p.name, name, sizeof(p.name));
2394
2395         switch (p.iph.protocol) {
2396         case IPPROTO_IPIP:
2397                 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
2398         case IPPROTO_IPV6:
2399                 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
2400         default:
2401                 break;
2402         }
2403         return -1;
2404 }
2405
2406 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
2407 {
2408         struct blob_attr *cur;
2409         const char *str;
2410
2411         if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2412                 return -EINVAL;
2413         str = blobmsg_data(cur);
2414
2415         if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
2416             !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
2417             !strcmp(str, "vtiip") || !strcmp(str, "vtiip6"))
2418                 return system_link_del(name);
2419         else
2420                 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
2421 }
2422
2423 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
2424 {
2425         struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2426
2427         blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2428                 blob_data(attr), blob_len(attr));
2429
2430         return __system_del_ip_tunnel(name, tb);
2431 }
2432
2433 int system_update_ipv6_mtu(struct device *dev, int mtu)
2434 {
2435         int ret = -1;
2436         char buf[64];
2437         snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
2438                         dev->ifname);
2439
2440         int fd = open(buf, O_RDWR);
2441
2442         if (!mtu) {
2443                 ssize_t len = read(fd, buf, sizeof(buf) - 1);
2444                 if (len < 0)
2445                         goto out;
2446
2447                 buf[len] = 0;
2448                 ret = atoi(buf);
2449         } else {
2450                 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
2451                         ret = mtu;
2452         }
2453
2454 out:
2455         close(fd);
2456         return ret;
2457 }
2458
2459 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
2460 {
2461         struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2462         struct blob_attr *cur;
2463         const char *str;
2464
2465         blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2466                 blob_data(attr), blob_len(attr));
2467
2468         __system_del_ip_tunnel(name, tb);
2469
2470         if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2471                 return -EINVAL;
2472         str = blobmsg_data(cur);
2473
2474         unsigned int ttl = 0;
2475         if ((cur = tb[TUNNEL_ATTR_TTL])) {
2476                 ttl = blobmsg_get_u32(cur);
2477                 if (ttl > 255)
2478                         return -EINVAL;
2479         }
2480
2481         unsigned int link = 0;
2482         if ((cur = tb[TUNNEL_ATTR_LINK])) {
2483                 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
2484                 if (!iface)
2485                         return -EINVAL;
2486
2487                 if (iface->l3_dev.dev)
2488                         link = iface->l3_dev.dev->ifindex;
2489         }
2490
2491         if (!strcmp(str, "sit")) {
2492                 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
2493                         return -1;
2494
2495 #ifdef SIOCADD6RD
2496                 if ((cur = tb[TUNNEL_ATTR_6RD_PREFIX])) {
2497                         unsigned int mask;
2498                         struct ip_tunnel_6rd p6;
2499
2500                         memset(&p6, 0, sizeof(p6));
2501
2502                         if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
2503                                                 &p6.prefix, &mask) || mask > 128)
2504                                 return -EINVAL;
2505                         p6.prefixlen = mask;
2506
2507                         if ((cur = tb[TUNNEL_ATTR_6RD_RELAY_PREFIX])) {
2508                                 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
2509                                                         &p6.relay_prefix, &mask) || mask > 32)
2510                                         return -EINVAL;
2511                                 p6.relay_prefixlen = mask;
2512                         }
2513
2514                         if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
2515                                 __system_del_ip_tunnel(name, tb);
2516                                 return -1;
2517                         }
2518                 }
2519 #endif
2520 #ifdef IFLA_IPTUN_MAX
2521         } else if (!strcmp(str, "ipip6")) {
2522                 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2523                                 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2524                 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2525                 int ret = 0;
2526
2527                 if (!nlm)
2528                         return -1;
2529
2530                 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2531                 nla_put_string(nlm, IFLA_IFNAME, name);
2532
2533                 if (link)
2534                         nla_put_u32(nlm, IFLA_LINK, link);
2535
2536                 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2537                 if (!linkinfo) {
2538                         ret = -ENOMEM;
2539                         goto failure;
2540                 }
2541                 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2542                 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2543                 if (!infodata) {
2544                         ret = -ENOMEM;
2545                         goto failure;
2546                 }
2547
2548                 if (link)
2549                         nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2550
2551                 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2552                 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2553                 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, 4);
2554
2555                 struct in6_addr in6buf;
2556                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2557                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2558                                 ret = -EINVAL;
2559                                 goto failure;
2560                         }
2561                         nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2562                 }
2563
2564                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2565                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2566                                 ret = -EINVAL;
2567                                 goto failure;
2568                         }
2569                         nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2570                 }
2571
2572 #ifdef IFLA_IPTUN_FMR_MAX
2573                 if ((cur = tb[TUNNEL_ATTR_FMRS])) {
2574                         struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2575
2576                         struct blob_attr *fmr;
2577                         unsigned rem, fmrcnt = 0;
2578                         blobmsg_for_each_attr(fmr, cur, rem) {
2579                                 if (blobmsg_type(fmr) != BLOBMSG_TYPE_STRING)
2580                                         continue;
2581
2582                                 unsigned ip4len, ip6len, ealen, offset = 6;
2583                                 char ip6buf[48];
2584                                 char ip4buf[16];
2585
2586                                 if (sscanf(blobmsg_get_string(fmr), "%47[^/]/%u,%15[^/]/%u,%u,%u",
2587                                                 ip6buf, &ip6len, ip4buf, &ip4len, &ealen, &offset) < 5) {
2588                                         ret = -EINVAL;
2589                                         goto failure;
2590                                 }
2591
2592                                 struct in6_addr ip6prefix;
2593                                 struct in_addr ip4prefix;
2594                                 if (inet_pton(AF_INET6, ip6buf, &ip6prefix) != 1 ||
2595                                                 inet_pton(AF_INET, ip4buf, &ip4prefix) != 1) {
2596                                         ret = -EINVAL;
2597                                         goto failure;
2598                                 }
2599
2600                                 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2601
2602                                 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2603                                 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2604                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2605                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2606                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2607                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2608
2609                                 nla_nest_end(nlm, rule);
2610                         }
2611
2612                         nla_nest_end(nlm, fmrs);
2613                 }
2614 #endif
2615
2616                 nla_nest_end(nlm, infodata);
2617                 nla_nest_end(nlm, linkinfo);
2618
2619                 return system_rtnl_call(nlm);
2620 failure:
2621                 nlmsg_free(nlm);
2622                 return ret;
2623         } else if (!strcmp(str, "greip")) {
2624                 return system_add_gre_tunnel(name, "gre", link, tb, false);
2625         } else if (!strcmp(str, "gretapip"))  {
2626                 return system_add_gre_tunnel(name, "gretap", link, tb, false);
2627         } else if (!strcmp(str, "greip6")) {
2628                 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
2629         } else if (!strcmp(str, "gretapip6")) {
2630                 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
2631 #ifdef IFLA_VTI_MAX
2632         } else if (!strcmp(str, "vtiip")) {
2633                 return system_add_vti_tunnel(name, "vti", link, tb, false);
2634         } else if (!strcmp(str, "vtiip6")) {
2635                 return system_add_vti_tunnel(name, "vti6", link, tb, true);
2636 #endif
2637 #endif
2638         } else if (!strcmp(str, "ipip")) {
2639                 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
2640         }
2641         else
2642                 return -EINVAL;
2643
2644         return 0;
2645 }