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 IFA_F_NOPREFIXROUTE
  48 #define IFA_F_NOPREFIXROUTE 0x200
  49 #endif
  50
  51 #ifndef IFA_FLAGS
  52 #define IFA_FLAGS (IFA_MULTICAST + 1)
  53 #endif
  54
  55
  56 #include <string.h>
  57 #include <fcntl.h>
  58 #include <glob.h>
  59 #include <time.h>
  60 #include <unistd.h>
  61
  62 #include <netlink/msg.h>
  63 #include <netlink/attr.h>
  64 #include <netlink/socket.h>
  65 #include <libubox/uloop.h>
  66
  67 #include "netifd.h"
  68 #include "device.h"
  69 #include "system.h"
  70
  71 struct event_socket {
  72         struct uloop_fd uloop;
  73         struct nl_sock *sock;
  74         int bufsize;
  75 };
  76
  77 static int sock_ioctl = -1;
  78 static struct nl_sock *sock_rtnl = NULL;
  79
  80 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
  81 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
  82
  83 static char dev_buf[256];
  84
  85 static void
  86 handler_nl_event(struct uloop_fd *u, unsigned int events)
  87 {
  88         struct event_socket *ev = container_of(u, struct event_socket, uloop);
  89         int err;
  90         socklen_t errlen = sizeof(err);
  91
  92         if (!u->error) {
  93                 nl_recvmsgs_default(ev->sock);
  94                 return;
  95         }
  96
  97         if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
  98                 goto abort;
  99
 100         switch(err) {
 101         case ENOBUFS:
 102                 // Increase rx buffer size on netlink socket
 103                 ev->bufsize *= 2;
 104                 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
 105                         goto abort;
 106
 107                 // Request full dump since some info got dropped
 108                 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
 109                 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
 110                 break;
 111
 112         default:
 113                 goto abort;
 114         }
 115         u->error = false;
 116         return;
 117
 118 abort:
 119         uloop_fd_delete(&ev->uloop);
 120         return;
 121 }
 122
 123 static struct nl_sock *
 124 create_socket(int protocol, int groups)
 125 {
 126         struct nl_sock *sock;
 127
 128         sock = nl_socket_alloc();
 129         if (!sock)
 130                 return NULL;
 131
 132         if (groups)
 133                 nl_join_groups(sock, groups);
 134
 135         if (nl_connect(sock, protocol))
 136                 return NULL;
 137
 138         return sock;
 139 }
 140
 141 static bool
 142 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
 143                         uloop_fd_handler cb, int flags)
 144 {
 145         ev->sock = create_socket(protocol, groups);
 146         if (!ev->sock)
 147                 return false;
 148
 149         ev->uloop.fd = nl_socket_get_fd(ev->sock);
 150         ev->uloop.cb = cb;
 151         if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
 152                 return false;
 153
 154         return true;
 155 }
 156
 157 static bool
 158 create_event_socket(struct event_socket *ev, int protocol,
 159                     int (*cb)(struct nl_msg *msg, void *arg))
 160 {
 161         if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
 162                 return false;
 163
 164         // Install the valid custom callback handler
 165         nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
 166
 167         // Disable sequence number checking on event sockets
 168         nl_socket_disable_seq_check(ev->sock);
 169
 170         // Increase rx buffer size to 65K on event sockets
 171         ev->bufsize = 65535;
 172         if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
 173                 return false;
 174
 175         return true;
 176 }
 177
 178 static bool
 179 system_rtn_aton(const char *src, unsigned int *dst)
 180 {
 181         char *e;
 182         unsigned int n;
 183
 184         if (!strcmp(src, "local"))
 185                 n = RTN_LOCAL;
 186         else if (!strcmp(src, "nat"))
 187                 n = RTN_NAT;
 188         else if (!strcmp(src, "broadcast"))
 189                 n = RTN_BROADCAST;
 190         else if (!strcmp(src, "anycast"))
 191                 n = RTN_ANYCAST;
 192         else if (!strcmp(src, "multicast"))
 193                 n = RTN_MULTICAST;
 194         else if (!strcmp(src, "prohibit"))
 195                 n = RTN_PROHIBIT;
 196         else if (!strcmp(src, "unreachable"))
 197                 n = RTN_UNREACHABLE;
 198         else if (!strcmp(src, "blackhole"))
 199                 n = RTN_BLACKHOLE;
 200         else if (!strcmp(src, "xresolve"))
 201                 n = RTN_XRESOLVE;
 202         else if (!strcmp(src, "unicast"))
 203                 n = RTN_UNICAST;
 204         else if (!strcmp(src, "throw"))
 205                 n = RTN_THROW;
 206         else if (!strcmp(src, "failed_policy"))
 207                 n = RTN_FAILED_POLICY;
 208         else {
 209                 n = strtoul(src, &e, 0);
 210                 if (!e || *e || e == src || n > 255)
 211                         return false;
 212         }
 213
 214         *dst = n;
 215         return true;
 216 }
 217
 218 static bool
 219 system_tos_aton(const char *src, unsigned *dst)
 220 {
 221         char *e;
 222
 223         *dst = strtoul(src, &e, 16);
 224         if (e == src || *e || *dst > 255)
 225                 return false;
 226
 227         return true;
 228 }
 229
 230 int system_init(void)
 231 {
 232         static struct event_socket rtnl_event;
 233         static struct event_socket hotplug_event;
 234
 235         sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
 236         system_fd_set_cloexec(sock_ioctl);
 237
 238         // Prepare socket for routing / address control
 239         sock_rtnl = create_socket(NETLINK_ROUTE, 0);
 240         if (!sock_rtnl)
 241                 return -1;
 242
 243         if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
 244                 return -1;
 245
 246         if (!create_raw_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT, 1,
 247                                      handle_hotplug_event, 0))
 248                 return -1;
 249
 250         // Receive network link events form kernel
 251         nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
 252
 253         return 0;
 254 }
 255
 256 static void system_set_sysctl(const char *path, const char *val)
 257 {
 258         int fd;
 259
 260         fd = open(path, O_WRONLY);
 261         if (fd < 0)
 262                 return;
 263
 264         if (write(fd, val, strlen(val))) {}
 265         close(fd);
 266 }
 267
 268 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
 269 {
 270         snprintf(dev_buf, sizeof(dev_buf), path, device);
 271         system_set_sysctl(dev_buf, val);
 272 }
 273
 274 static void system_set_disable_ipv6(struct device *dev, const char *val)
 275 {
 276         system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
 277 }
 278
 279 static void system_set_rpfilter(struct device *dev, const char *val)
 280 {
 281         system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
 282 }
 283
 284 static void system_set_acceptlocal(struct device *dev, const char *val)
 285 {
 286         system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
 287 }
 288
 289 static void system_set_igmpversion(struct device *dev, const char *val)
 290 {
 291         system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val);
 292 }
 293
 294 static void system_set_mldversion(struct device *dev, const char *val)
 295 {
 296         system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val);
 297 }
 298
 299 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
 300 {
 301         system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val);
 302 }
 303
 304 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
 305 {
 306         system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val);
 307 }
 308
 309 static void system_set_dadtransmits(struct device *dev, const char *val)
 310 {
 311         system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
 312 }
 313
 314 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
 315 {
 316         system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
 317 }
 318
 319 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
 320 {
 321         system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
 322 }
 323
 324 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
 325 {
 326         system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
 327                                        "/sys/class/net/%s/brport/multicast_router",
 328                               dev->ifname, val);
 329 }
 330
 331 static void system_bridge_set_robustness(struct device *dev, const char *val)
 332 {
 333         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
 334                               dev->ifname, val);
 335         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
 336                               dev->ifname, val);
 337 }
 338
 339 static void system_bridge_set_query_interval(struct device *dev, const char *val)
 340 {
 341         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
 342                               dev->ifname, val);
 343 }
 344
 345 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
 346 {
 347         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
 348                               dev->ifname, val);
 349 }
 350
 351 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
 352 {
 353         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
 354                               dev->ifname, val);
 355 }
 356
 357 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
 358 {
 359         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
 360                               dev->ifname, val);
 361 }
 362
 363 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
 364 {
 365         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
 366                               dev->ifname, val);
 367 }
 368
 369 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
 370 {
 371         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
 372                               dev->ifname, val);
 373 }
 374
 375 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
 376 {
 377         int fd = -1, ret = -1;
 378
 379         fd = open(path, O_RDONLY);
 380         if (fd < 0)
 381                 goto out;
 382
 383         ssize_t len = read(fd, buf, buf_sz - 1);
 384         if (len < 0)
 385                 goto out;
 386
 387         ret = buf[len] = 0;
 388
 389 out:
 390         if (fd >= 0)
 391                 close(fd);
 392
 393         return ret;
 394 }
 395
 396 static int
 397 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
 398 {
 399         snprintf(dev_buf, sizeof(dev_buf), path, device);
 400         return system_get_sysctl(dev_buf, buf, buf_sz);
 401 }
 402
 403 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
 404 {
 405         return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
 406                         dev->ifname, buf, buf_sz);
 407 }
 408
 409 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
 410 {
 411         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
 412                         dev->ifname, buf, buf_sz);
 413 }
 414
 415 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
 416 {
 417         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
 418                         dev->ifname, buf, buf_sz);
 419 }
 420
 421 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
 422 {
 423         return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
 424                         dev->ifname, buf, buf_sz);
 425 }
 426
 427 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
 428 {
 429         return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
 430                         dev->ifname, buf, buf_sz);
 431 }
 432
 433 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
 434 {
 435         return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
 436                         dev->ifname, buf, buf_sz);
 437 }
 438
 439 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
 440 {
 441         return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
 442                         dev->ifname, buf, buf_sz);
 443 }
 444
 445 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
 446 {
 447         return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
 448                         dev->ifname, buf, buf_sz);
 449 }
 450
 451 // Evaluate netlink messages
 452 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
 453 {
 454         struct nlmsghdr *nh = nlmsg_hdr(msg);
 455         struct nlattr *nla[__IFLA_MAX];
 456         int link_state = 0;
 457         char buf[10];
 458
 459         if (nh->nlmsg_type != RTM_NEWLINK)
 460                 goto out;
 461
 462         nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
 463         if (!nla[IFLA_IFNAME])
 464                 goto out;
 465
 466         struct device *dev = device_get(nla_data(nla[IFLA_IFNAME]), false);
 467         if (!dev)
 468                 goto out;
 469
 470         if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
 471                 link_state = strtoul(buf, NULL, 0);
 472
 473         device_set_link(dev, link_state ? true : false);
 474
 475 out:
 476         return 0;
 477 }
 478
 479 static void
 480 handle_hotplug_msg(char *data, int size)
 481 {
 482         const char *subsystem = NULL, *interface = NULL;
 483         char *cur, *end, *sep;
 484         struct device *dev;
 485         int skip;
 486         bool add;
 487
 488         if (!strncmp(data, "add@", 4))
 489                 add = true;
 490         else if (!strncmp(data, "remove@", 7))
 491                 add = false;
 492         else
 493                 return;
 494
 495         skip = strlen(data) + 1;
 496         end = data + size;
 497
 498         for (cur = data + skip; cur < end; cur += skip) {
 499                 skip = strlen(cur) + 1;
 500
 501                 sep = strchr(cur, '=');
 502                 if (!sep)
 503                         continue;
 504
 505                 *sep = 0;
 506                 if (!strcmp(cur, "INTERFACE"))
 507                         interface = sep + 1;
 508                 else if (!strcmp(cur, "SUBSYSTEM")) {
 509                         subsystem = sep + 1;
 510                         if (strcmp(subsystem, "net") != 0)
 511                                 return;
 512                 }
 513                 if (subsystem && interface)
 514                         goto found;
 515         }
 516         return;
 517
 518 found:
 519         dev = device_get(interface, false);
 520         if (!dev)
 521                 return;
 522
 523         if (dev->type != &simple_device_type)
 524                 return;
 525
 526         if (add && system_if_force_external(dev->ifname))
 527                 return;
 528
 529         device_set_present(dev, add);
 530 }
 531
 532 static void
 533 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
 534 {
 535         struct event_socket *ev = container_of(u, struct event_socket, uloop);
 536         struct sockaddr_nl nla;
 537         unsigned char *buf = NULL;
 538         int size;
 539
 540         while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
 541                 if (nla.nl_pid == 0)
 542                         handle_hotplug_msg((char *) buf, size);
 543
 544                 free(buf);
 545         }
 546 }
 547
 548 static int system_rtnl_call(struct nl_msg *msg)
 549 {
 550         int ret;
 551
 552         ret = nl_send_auto_complete(sock_rtnl, msg);
 553         nlmsg_free(msg);
 554
 555         if (ret < 0)
 556                 return ret;
 557
 558         return nl_wait_for_ack(sock_rtnl);
 559 }
 560
 561 int system_bridge_delbr(struct device *bridge)
 562 {
 563         return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
 564 }
 565
 566 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
 567 {
 568         struct ifreq ifr;
 569
 570         memset(&ifr, 0, sizeof(ifr));
 571         if (dev)
 572                 ifr.ifr_ifindex = dev->ifindex;
 573         else
 574                 ifr.ifr_data = data;
 575         strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name));
 576         return ioctl(sock_ioctl, cmd, &ifr);
 577 }
 578
 579 static bool system_is_bridge(const char *name, char *buf, int buflen)
 580 {
 581         struct stat st;
 582
 583         snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
 584         if (stat(buf, &st) < 0)
 585                 return false;
 586
 587         return true;
 588 }
 589
 590 static char *system_get_bridge(const char *name, char *buf, int buflen)
 591 {
 592         char *path;
 593         ssize_t len = -1;
 594         glob_t gl;
 595
 596         snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
 597         if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
 598                 return NULL;
 599
 600         if (gl.gl_pathc > 0)
 601                 len = readlink(gl.gl_pathv[0], buf, buflen);
 602
 603         globfree(&gl);
 604
 605         if (len < 0)
 606                 return NULL;
 607
 608         buf[len] = 0;
 609         path = strrchr(buf, '/');
 610         if (!path)
 611                 return NULL;
 612
 613         return path + 1;
 614 }
 615
 616 static void
 617 system_bridge_set_wireless(struct device *bridge, struct device *dev)
 618 {
 619         bool mcast_to_ucast = dev->wireless_ap;
 620         bool hairpin = true;
 621
 622         if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
 623             !bridge->settings.multicast_to_unicast)
 624                 mcast_to_ucast = false;
 625
 626         if (!mcast_to_ucast || dev->wireless_isolate)
 627                 hairpin = false;
 628
 629         system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
 630         system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
 631 }
 632
 633 int system_bridge_addif(struct device *bridge, struct device *dev)
 634 {
 635         char buf[64];
 636         char *oldbr;
 637         int ret = 0;
 638
 639         oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
 640         if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
 641                 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
 642
 643         if (dev->wireless)
 644                 system_bridge_set_wireless(bridge, dev);
 645
 646         if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
 647                 snprintf(buf, sizeof(buf), "%i", dev->settings.multicast_router);
 648                 system_bridge_set_multicast_router(dev, buf, false);
 649         }
 650
 651         return ret;
 652 }
 653
 654 int system_bridge_delif(struct device *bridge, struct device *dev)
 655 {
 656         return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
 657 }
 658
 659 int system_if_resolve(struct device *dev)
 660 {
 661         struct ifreq ifr;
 662         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
 663         if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
 664                 return ifr.ifr_ifindex;
 665         else
 666                 return 0;
 667 }
 668
 669 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
 670 {
 671         struct ifreq ifr;
 672
 673         memset(&ifr, 0, sizeof(ifr));
 674         strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
 675         ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr);
 676         ifr.ifr_flags |= add;
 677         ifr.ifr_flags &= ~rem;
 678         return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
 679 }
 680
 681 struct clear_data {
 682         struct nl_msg *msg;
 683         struct device *dev;
 684         int type;
 685         int size;
 686         int af;
 687 };
 688
 689
 690 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
 691 {
 692         struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
 693
 694         return ifa->ifa_index == ifindex;
 695 }
 696
 697 static bool check_route(struct nlmsghdr *hdr, int ifindex)
 698 {
 699         struct rtmsg *r = NLMSG_DATA(hdr);
 700         struct nlattr *tb[__RTA_MAX];
 701
 702         if (r->rtm_protocol == RTPROT_KERNEL &&
 703             r->rtm_family == AF_INET6)
 704                 return false;
 705
 706         nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
 707         if (!tb[RTA_OIF])
 708                 return false;
 709
 710         return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
 711 }
 712
 713 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
 714 {
 715         return true;
 716 }
 717
 718 static int cb_clear_event(struct nl_msg *msg, void *arg)
 719 {
 720         struct clear_data *clr = arg;
 721         struct nlmsghdr *hdr = nlmsg_hdr(msg);
 722         bool (*cb)(struct nlmsghdr *, int ifindex);
 723         int type;
 724
 725         switch(clr->type) {
 726         case RTM_GETADDR:
 727                 type = RTM_DELADDR;
 728                 if (hdr->nlmsg_type != RTM_NEWADDR)
 729                         return NL_SKIP;
 730
 731                 cb = check_ifaddr;
 732                 break;
 733         case RTM_GETROUTE:
 734                 type = RTM_DELROUTE;
 735                 if (hdr->nlmsg_type != RTM_NEWROUTE)
 736                         return NL_SKIP;
 737
 738                 cb = check_route;
 739                 break;
 740         case RTM_GETRULE:
 741                 type = RTM_DELRULE;
 742                 if (hdr->nlmsg_type != RTM_NEWRULE)
 743                         return NL_SKIP;
 744
 745                 cb = check_rule;
 746                 break;
 747         default:
 748                 return NL_SKIP;
 749         }
 750
 751         if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
 752                 return NL_SKIP;
 753
 754         if (type == RTM_DELRULE)
 755                 D(SYSTEM, "Remove a rule\n");
 756         else
 757                 D(SYSTEM, "Remove %s from device %s\n",
 758                   type == RTM_DELADDR ? "an address" : "a route",
 759                   clr->dev->ifname);
 760         memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
 761         hdr = nlmsg_hdr(clr->msg);
 762         hdr->nlmsg_type = type;
 763         hdr->nlmsg_flags = NLM_F_REQUEST;
 764
 765         nl_socket_disable_auto_ack(sock_rtnl);
 766         nl_send_auto_complete(sock_rtnl, clr->msg);
 767         nl_socket_enable_auto_ack(sock_rtnl);
 768
 769         return NL_SKIP;
 770 }
 771
 772 static int
 773 cb_finish_event(struct nl_msg *msg, void *arg)
 774 {
 775         int *pending = arg;
 776         *pending = 0;
 777         return NL_STOP;
 778 }
 779
 780 static int
 781 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
 782 {
 783         int *pending = arg;
 784         *pending = err->error;
 785         return NL_STOP;
 786 }
 787
 788 static void
 789 system_if_clear_entries(struct device *dev, int type, int af)
 790 {
 791         struct clear_data clr;
 792         struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
 793         struct rtmsg rtm = {
 794                 .rtm_family = af,
 795                 .rtm_flags = RTM_F_CLONED,
 796         };
 797         int flags = NLM_F_DUMP;
 798         int pending = 1;
 799
 800         clr.af = af;
 801         clr.dev = dev;
 802         clr.type = type;
 803         switch (type) {
 804         case RTM_GETADDR:
 805         case RTM_GETRULE:
 806                 clr.size = sizeof(struct rtgenmsg);
 807                 break;
 808         case RTM_GETROUTE:
 809                 clr.size = sizeof(struct rtmsg);
 810                 break;
 811         default:
 812                 return;
 813         }
 814
 815         if (!cb)
 816                 return;
 817
 818         clr.msg = nlmsg_alloc_simple(type, flags);
 819         if (!clr.msg)
 820                 goto out;
 821
 822         nlmsg_append(clr.msg, &rtm, clr.size, 0);
 823         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
 824         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
 825         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
 826
 827         nl_send_auto_complete(sock_rtnl, clr.msg);
 828         while (pending > 0)
 829                 nl_recvmsgs(sock_rtnl, cb);
 830
 831         nlmsg_free(clr.msg);
 832 out:
 833         nl_cb_put(cb);
 834 }
 835
 836 /*
 837  * Clear bridge (membership) state and bring down device
 838  */
 839 void system_if_clear_state(struct device *dev)
 840 {
 841         static char buf[256];
 842         char *bridge;
 843
 844         device_set_ifindex(dev, system_if_resolve(dev));
 845         if (dev->external || !dev->ifindex)
 846                 return;
 847
 848         system_if_flags(dev->ifname, 0, IFF_UP);
 849
 850         if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
 851                 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
 852                 system_bridge_delbr(dev);
 853                 return;
 854         }
 855
 856         bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
 857         if (bridge) {
 858                 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
 859                 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
 860         }
 861
 862         system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
 863         system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
 864         system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
 865         system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
 866         system_set_disable_ipv6(dev, "0");
 867 }
 868
 869 static inline unsigned long
 870 sec_to_jiffies(int val)
 871 {
 872         return (unsigned long) val * 100;
 873 }
 874
 875 static void system_bridge_conf_multicast_deps(struct device *bridge,
 876                                               struct bridge_config *cfg,
 877                                               char *buf,
 878                                               int buf_len)
 879 {
 880         int val;
 881
 882         if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
 883             cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
 884             cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
 885                 val = cfg->robustness * cfg->query_interval +
 886                         cfg->query_response_interval;
 887
 888                 snprintf(buf, buf_len, "%i", val);
 889                 system_bridge_set_membership_interval(bridge, buf);
 890
 891                 val = cfg->robustness * cfg->query_interval +
 892                         cfg->query_response_interval / 2;
 893
 894                 snprintf(buf, buf_len, "%i", val);
 895                 system_bridge_set_other_querier_timeout(bridge, buf);
 896         }
 897
 898         if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
 899                 val = cfg->query_interval / 4;
 900
 901                 snprintf(buf, buf_len, "%i", val);
 902                 system_bridge_set_startup_query_interval(bridge, buf);
 903         }
 904 }
 905
 906 static void system_bridge_conf_multicast(struct device *bridge,
 907                                          struct bridge_config *cfg,
 908                                          char *buf,
 909                                          int buf_len)
 910 {
 911         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
 912                 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
 913
 914         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
 915                 bridge->ifname, cfg->multicast_querier ? "1" : "0");
 916
 917         snprintf(buf, buf_len, "%i", cfg->hash_max);
 918         system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
 919                 bridge->ifname, buf);
 920
 921         if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
 922                 snprintf(buf, buf_len, "%i", bridge->settings.multicast_router);
 923                 system_bridge_set_multicast_router(bridge, buf, true);
 924         }
 925
 926         if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
 927                 snprintf(buf, buf_len, "%i", cfg->robustness);
 928                 system_bridge_set_robustness(bridge, buf);
 929         }
 930
 931         if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
 932                 snprintf(buf, buf_len, "%i", cfg->query_interval);
 933                 system_bridge_set_query_interval(bridge, buf);
 934         }
 935
 936         if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
 937                 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
 938                 system_bridge_set_query_response_interval(bridge, buf);
 939         }
 940
 941         if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
 942                 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
 943                 system_bridge_set_last_member_interval(bridge, buf);
 944         }
 945
 946         system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
 947 }
 948
 949 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
 950 {
 951         char buf[64];
 952         unsigned long args[4] = {};
 953
 954         if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
 955                 return -1;
 956
 957         args[0] = BRCTL_SET_BRIDGE_STP_STATE;
 958         args[1] = !!cfg->stp;
 959         system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
 960
 961         args[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY;
 962         args[1] = sec_to_jiffies(cfg->forward_delay);
 963         system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
 964
 965         system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
 966
 967         args[0] = BRCTL_SET_BRIDGE_PRIORITY;
 968         args[1] = cfg->priority;
 969         system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
 970
 971         if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
 972                 args[0] = BRCTL_SET_AGEING_TIME;
 973                 args[1] = sec_to_jiffies(cfg->ageing_time);
 974                 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
 975         }
 976
 977         if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
 978                 args[0] = BRCTL_SET_BRIDGE_HELLO_TIME;
 979                 args[1] = sec_to_jiffies(cfg->hello_time);
 980                 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
 981         }
 982
 983         if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
 984                 args[0] = BRCTL_SET_BRIDGE_MAX_AGE;
 985                 args[1] = sec_to_jiffies(cfg->max_age);
 986                 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
 987         }
 988
 989         return 0;
 990 }
 991
 992 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
 993 {
 994         struct nl_msg *msg;
 995         struct nlattr *linkinfo, *data;
 996         struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
 997         int i, rv;
 998         static const struct {
 999                 const char *name;
1000                 enum macvlan_mode val;
1001         } modes[] = {
1002                 { "private", MACVLAN_MODE_PRIVATE },
1003                 { "vepa", MACVLAN_MODE_VEPA },
1004                 { "bridge", MACVLAN_MODE_BRIDGE },
1005                 { "passthru", MACVLAN_MODE_PASSTHRU },
1006         };
1007
1008         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1009
1010         if (!msg)
1011                 return -1;
1012
1013         nlmsg_append(msg, &iim, sizeof(iim), 0);
1014
1015         if (cfg->flags & MACVLAN_OPT_MACADDR)
1016                 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1017         nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1018         nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1019
1020         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1021                 goto nla_put_failure;
1022
1023         nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1024
1025         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1026                 goto nla_put_failure;
1027
1028         if (cfg->mode) {
1029                 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1030                         if (strcmp(cfg->mode, modes[i].name) != 0)
1031                                 continue;
1032
1033                         nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1034                         break;
1035                 }
1036         }
1037
1038         nla_nest_end(msg, data);
1039         nla_nest_end(msg, linkinfo);
1040
1041         rv = system_rtnl_call(msg);
1042         if (rv)
1043                 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1044
1045         return rv;
1046
1047 nla_put_failure:
1048         nlmsg_free(msg);
1049         return -ENOMEM;
1050 }
1051
1052 static int system_link_del(const char *ifname)
1053 {
1054         struct nl_msg *msg;
1055         struct ifinfomsg iim = {
1056                 .ifi_family = AF_UNSPEC,
1057                 .ifi_index = 0,
1058         };
1059
1060         msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1061
1062         if (!msg)
1063                 return -1;
1064
1065         nlmsg_append(msg, &iim, sizeof(iim), 0);
1066         nla_put_string(msg, IFLA_IFNAME, ifname);
1067         return system_rtnl_call(msg);
1068 }
1069
1070 int system_macvlan_del(struct device *macvlan)
1071 {
1072         return system_link_del(macvlan->ifname);
1073 }
1074
1075 static int system_vlan(struct device *dev, int id)
1076 {
1077         struct vlan_ioctl_args ifr = {
1078                 .cmd = SET_VLAN_NAME_TYPE_CMD,
1079                 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1080         };
1081
1082         ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1083
1084         if (id < 0) {
1085                 ifr.cmd = DEL_VLAN_CMD;
1086                 ifr.u.VID = 0;
1087         } else {
1088                 ifr.cmd = ADD_VLAN_CMD;
1089                 ifr.u.VID = id;
1090         }
1091         strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1092         return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1093 }
1094
1095 int system_vlan_add(struct device *dev, int id)
1096 {
1097         return system_vlan(dev, id);
1098 }
1099
1100 int system_vlan_del(struct device *dev)
1101 {
1102         return system_vlan(dev, -1);
1103 }
1104
1105 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1106 {
1107         struct nl_msg *msg;
1108         struct nlattr *linkinfo, *data;
1109         struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1110         int rv;
1111
1112         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1113
1114         if (!msg)
1115                 return -1;
1116
1117         nlmsg_append(msg, &iim, sizeof(iim), 0);
1118         nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1119         nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1120
1121         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1122                 goto nla_put_failure;
1123
1124         nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1125
1126         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1127                 goto nla_put_failure;
1128
1129         nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1130
1131 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1132         nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1133 #else
1134         if(cfg->proto == VLAN_PROTO_8021AD)
1135                 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);
1136 #endif
1137
1138         nla_nest_end(msg, data);
1139         nla_nest_end(msg, linkinfo);
1140
1141         rv = system_rtnl_call(msg);
1142         if (rv)
1143                 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1144
1145         return rv;
1146
1147 nla_put_failure:
1148         nlmsg_free(msg);
1149         return -ENOMEM;
1150 }
1151
1152 int system_vlandev_del(struct device *vlandev)
1153 {
1154         return system_link_del(vlandev->ifname);
1155 }
1156
1157 void
1158 system_if_get_settings(struct device *dev, struct device_settings *s)
1159 {
1160         struct ifreq ifr;
1161         char buf[10];
1162
1163         memset(&ifr, 0, sizeof(ifr));
1164         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1165
1166         if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1167                 s->mtu = ifr.ifr_mtu;
1168                 s->flags |= DEV_OPT_MTU;
1169         }
1170
1171         s->mtu6 = system_update_ipv6_mtu(dev, 0);
1172         if (s->mtu6 > 0)
1173                 s->flags |= DEV_OPT_MTU6;
1174
1175         if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1176                 s->txqueuelen = ifr.ifr_qlen;
1177                 s->flags |= DEV_OPT_TXQUEUELEN;
1178         }
1179
1180         if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1181                 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1182                 s->flags |= DEV_OPT_MACADDR;
1183         }
1184
1185         if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1186                 s->ipv6 = !strtoul(buf, NULL, 0);
1187                 s->flags |= DEV_OPT_IPV6;
1188         }
1189
1190         if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1191                 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1192                 s->flags |= DEV_OPT_PROMISC;
1193
1194                 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1195                 s->flags |= DEV_OPT_MULTICAST;
1196         }
1197
1198         if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1199                 s->rpfilter = strtoul(buf, NULL, 0);
1200                 s->flags |= DEV_OPT_RPFILTER;
1201         }
1202
1203         if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1204                 s->acceptlocal = strtoul(buf, NULL, 0);
1205                 s->flags |= DEV_OPT_ACCEPTLOCAL;
1206         }
1207
1208         if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1209                 s->igmpversion = strtoul(buf, NULL, 0);
1210                 s->flags |= DEV_OPT_IGMPVERSION;
1211         }
1212
1213         if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1214                 s->mldversion = strtoul(buf, NULL, 0);
1215                 s->flags |= DEV_OPT_MLDVERSION;
1216         }
1217
1218         if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1219                 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1220                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1221         }
1222
1223         if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1224                 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1225                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1226         }
1227
1228         if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1229                 s->dadtransmits = strtoul(buf, NULL, 0);
1230                 s->flags |= DEV_OPT_DADTRANSMITS;
1231         }
1232 }
1233
1234 static void
1235 system_if_set_rps_xps_val(const char *path, int val)
1236 {
1237         char val_buf[8];
1238         glob_t gl;
1239         int i;
1240
1241         if (glob(path, 0, NULL, &gl))
1242                 return;
1243
1244         snprintf(val_buf, sizeof(val_buf), "%x", val);
1245         for (i = 0; i < gl.gl_pathc; i++)
1246                 system_set_sysctl(gl.gl_pathv[i], val_buf);
1247
1248         globfree(&gl);
1249 }
1250
1251 static void
1252 system_if_apply_rps_xps(struct device *dev, struct device_settings *s)
1253 {
1254         long n_cpus = sysconf(_SC_NPROCESSORS_ONLN);
1255         int val;
1256
1257         if (n_cpus < 2)
1258                 return;
1259
1260         val = (1 << n_cpus) - 1;
1261         snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/rps_cpus", dev->ifname);
1262         system_if_set_rps_xps_val(dev_buf, s->rps ? val : 0);
1263
1264         snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/xps_cpus", dev->ifname);
1265         system_if_set_rps_xps_val(dev_buf, s->xps ? val : 0);
1266 }
1267
1268 void
1269 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1270 {
1271         struct ifreq ifr;
1272         char buf[12];
1273
1274         memset(&ifr, 0, sizeof(ifr));
1275         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1276         if (s->flags & DEV_OPT_MTU & apply_mask) {
1277                 ifr.ifr_mtu = s->mtu;
1278                 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1279                         s->flags &= ~DEV_OPT_MTU;
1280         }
1281         if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1282                 system_update_ipv6_mtu(dev, s->mtu6);
1283         }
1284         if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1285                 ifr.ifr_qlen = s->txqueuelen;
1286                 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1287                         s->flags &= ~DEV_OPT_TXQUEUELEN;
1288         }
1289         if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1290                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1291                 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1292                 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1293                         s->flags &= ~DEV_OPT_MACADDR;
1294         }
1295         if (s->flags & DEV_OPT_IPV6 & apply_mask)
1296                 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1297         if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1298                 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1299                                     !s->promisc ? IFF_PROMISC : 0) < 0)
1300                         s->flags &= ~DEV_OPT_PROMISC;
1301         }
1302         if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1303                 snprintf(buf, sizeof(buf), "%d", s->rpfilter);
1304                 system_set_rpfilter(dev, buf);
1305         }
1306         if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1307                 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1308         if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1309                 snprintf(buf, sizeof(buf), "%d", s->igmpversion);
1310                 system_set_igmpversion(dev, buf);
1311         }
1312         if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1313                 snprintf(buf, sizeof(buf), "%d", s->mldversion);
1314                 system_set_mldversion(dev, buf);
1315         }
1316         if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1317                 snprintf(buf, sizeof(buf), "%d", s->neigh4reachabletime);
1318                 system_set_neigh4reachabletime(dev, buf);
1319                 snprintf(buf, sizeof(buf), "%d", s->neigh6reachabletime);
1320                 system_set_neigh6reachabletime(dev, buf);
1321         }
1322         if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1323                 snprintf(buf, sizeof(buf), "%d", s->dadtransmits);
1324                 system_set_dadtransmits(dev, buf);
1325         }
1326         if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1327                 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1328                                     !s->multicast ? IFF_MULTICAST : 0) < 0)
1329                         s->flags &= ~DEV_OPT_MULTICAST;
1330         }
1331
1332         system_if_apply_rps_xps(dev, s);
1333 }
1334
1335 int system_if_up(struct device *dev)
1336 {
1337         system_if_get_settings(dev, &dev->orig_settings);
1338         /* Only keep orig settings based on what needs to be set */
1339         dev->orig_settings.valid_flags = dev->orig_settings.flags;
1340         dev->orig_settings.flags &= dev->settings.flags;
1341         system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1342         return system_if_flags(dev->ifname, IFF_UP, 0);
1343 }
1344
1345 int system_if_down(struct device *dev)
1346 {
1347         int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1348         system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1349         return ret;
1350 }
1351
1352 struct if_check_data {
1353         struct device *dev;
1354         int pending;
1355         int ret;
1356 };
1357
1358 #ifndef IFF_LOWER_UP
1359 #define IFF_LOWER_UP    0x10000
1360 #endif
1361
1362 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1363 {
1364         struct nlmsghdr *nh = nlmsg_hdr(msg);
1365         struct ifinfomsg *ifi = NLMSG_DATA(nh);
1366         struct if_check_data *chk = (struct if_check_data *)arg;
1367
1368         if (nh->nlmsg_type != RTM_NEWLINK)
1369                 return NL_SKIP;
1370
1371         device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1372         device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1373
1374         return NL_OK;
1375 }
1376
1377 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1378 {
1379         struct if_check_data *chk = (struct if_check_data *)arg;
1380         chk->pending = 0;
1381         return NL_STOP;
1382 }
1383
1384 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1385 {
1386         struct if_check_data *chk = (struct if_check_data *)arg;
1387
1388         device_set_present(chk->dev, false);
1389         device_set_link(chk->dev, false);
1390         chk->pending = err->error;
1391
1392         return NL_STOP;
1393 }
1394
1395 int system_if_check(struct device *dev)
1396 {
1397         struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1398         struct nl_msg *msg;
1399         struct ifinfomsg ifi = {
1400                 .ifi_family = AF_UNSPEC,
1401                 .ifi_index = 0,
1402         };
1403         struct if_check_data chk = {
1404                 .dev = dev,
1405                 .pending = 1,
1406         };
1407         int ret = 1;
1408
1409         msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1410         if (!msg)
1411                 goto out;
1412
1413         if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1414             nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1415                 goto free;
1416
1417         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1418         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1419         nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1420
1421         nl_send_auto_complete(sock_rtnl, msg);
1422         while (chk.pending > 0)
1423                 nl_recvmsgs(sock_rtnl, cb);
1424
1425         ret = chk.pending;
1426
1427 free:
1428         nlmsg_free(msg);
1429 out:
1430         nl_cb_put(cb);
1431         return ret;
1432 }
1433
1434 struct device *
1435 system_if_get_parent(struct device *dev)
1436 {
1437         char buf[64], *devname;
1438         int ifindex, iflink, len;
1439         FILE *f;
1440
1441         snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1442         f = fopen(buf, "r");
1443         if (!f)
1444                 return NULL;
1445
1446         len = fread(buf, 1, sizeof(buf) - 1, f);
1447         fclose(f);
1448
1449         if (len <= 0)
1450                 return NULL;
1451
1452         buf[len] = 0;
1453         iflink = strtoul(buf, NULL, 0);
1454         ifindex = system_if_resolve(dev);
1455         if (!iflink || iflink == ifindex)
1456                 return NULL;
1457
1458         devname = if_indextoname(iflink, buf);
1459         if (!devname)
1460                 return NULL;
1461
1462         return device_get(devname, true);
1463 }
1464
1465 static bool
1466 read_string_file(int dir_fd, const char *file, char *buf, int len)
1467 {
1468         bool ret = false;
1469         char *c;
1470         int fd;
1471
1472         fd = openat(dir_fd, file, O_RDONLY);
1473         if (fd < 0)
1474                 return false;
1475
1476 retry:
1477         len = read(fd, buf, len - 1);
1478         if (len < 0) {
1479                 if (errno == EINTR)
1480                         goto retry;
1481         } else if (len > 0) {
1482                         buf[len] = 0;
1483
1484                         c = strchr(buf, '\n');
1485                         if (c)
1486                                 *c = 0;
1487
1488                         ret = true;
1489         }
1490
1491         close(fd);
1492
1493         return ret;
1494 }
1495
1496 static bool
1497 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1498 {
1499         char buf[64];
1500         bool ret = false;
1501
1502         ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1503         if (ret)
1504                 *val = strtoull(buf, NULL, 0);
1505
1506         return ret;
1507 }
1508
1509 /* Assume advertised flags == supported flags */
1510 static const struct {
1511         uint32_t mask;
1512         const char *name;
1513 } ethtool_link_modes[] = {
1514         { ADVERTISED_10baseT_Half, "10H" },
1515         { ADVERTISED_10baseT_Full, "10F" },
1516         { ADVERTISED_100baseT_Half, "100H" },
1517         { ADVERTISED_100baseT_Full, "100F" },
1518         { ADVERTISED_1000baseT_Half, "1000H" },
1519         { ADVERTISED_1000baseT_Full, "1000F" },
1520 };
1521
1522 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1523 {
1524         int i;
1525         for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1526                 if (mask & ethtool_link_modes[i].mask)
1527                         blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1528         }
1529 }
1530
1531 bool
1532 system_if_force_external(const char *ifname)
1533 {
1534         char buf[64];
1535         struct stat s;
1536
1537         snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1538         return stat(buf, &s) == 0;
1539 }
1540
1541 int
1542 system_if_dump_info(struct device *dev, struct blob_buf *b)
1543 {
1544         struct ethtool_cmd ecmd;
1545         struct ifreq ifr;
1546         char buf[64], *s;
1547         void *c;
1548         int dir_fd;
1549
1550         snprintf(buf, sizeof(buf), "/sys/class/net/%s", dev->ifname);
1551         dir_fd = open(buf, O_DIRECTORY);
1552
1553         memset(&ecmd, 0, sizeof(ecmd));
1554         memset(&ifr, 0, sizeof(ifr));
1555         strcpy(ifr.ifr_name, dev->ifname);
1556         ifr.ifr_data = (caddr_t) &ecmd;
1557         ecmd.cmd = ETHTOOL_GSET;
1558
1559         if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1560                 c = blobmsg_open_array(b, "link-advertising");
1561                 system_add_link_modes(b, ecmd.advertising);
1562                 blobmsg_close_array(b, c);
1563
1564                 c = blobmsg_open_array(b, "link-supported");
1565                 system_add_link_modes(b, ecmd.supported);
1566                 blobmsg_close_array(b, c);
1567
1568                 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1569                 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1570                         ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1571                 blobmsg_add_string_buffer(b);
1572         }
1573
1574         close(dir_fd);
1575         return 0;
1576 }
1577
1578 int
1579 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1580 {
1581         const char *const counters[] = {
1582                 "collisions",     "rx_frame_errors",   "tx_compressed",
1583                 "multicast",      "rx_length_errors",  "tx_dropped",
1584                 "rx_bytes",       "rx_missed_errors",  "tx_errors",
1585                 "rx_compressed",  "rx_over_errors",    "tx_fifo_errors",
1586                 "rx_crc_errors",  "rx_packets",        "tx_heartbeat_errors",
1587                 "rx_dropped",     "tx_aborted_errors", "tx_packets",
1588                 "rx_errors",      "tx_bytes",          "tx_window_errors",
1589                 "rx_fifo_errors", "tx_carrier_errors",
1590         };
1591         char buf[64];
1592         int stats_dir;
1593         int i;
1594         uint64_t val = 0;
1595
1596         snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1597         stats_dir = open(buf, O_DIRECTORY);
1598         if (stats_dir < 0)
1599                 return -1;
1600
1601         for (i = 0; i < ARRAY_SIZE(counters); i++)
1602                 if (read_uint64_file(stats_dir, counters[i], &val))
1603                         blobmsg_add_u64(b, counters[i], val);
1604
1605         close(stats_dir);
1606         return 0;
1607 }
1608
1609 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1610 {
1611         bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1612         int alen = v4 ? 4 : 16;
1613         unsigned int flags = 0;
1614         struct ifaddrmsg ifa = {
1615                 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1616                 .ifa_prefixlen = addr->mask,
1617                 .ifa_index = dev->ifindex,
1618         };
1619
1620         struct nl_msg *msg;
1621         if (cmd == RTM_NEWADDR)
1622                 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1623
1624         msg = nlmsg_alloc_simple(cmd, flags);
1625         if (!msg)
1626                 return -1;
1627
1628         nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1629         nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1630         if (v4) {
1631                 if (addr->broadcast)
1632                         nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1633                 if (addr->point_to_point)
1634                         nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1635         } else {
1636                 time_t now = system_get_rtime();
1637                 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1638
1639                 if (addr->preferred_until) {
1640                         int64_t preferred = addr->preferred_until - now;
1641                         if (preferred < 0)
1642                                 preferred = 0;
1643                         else if (preferred > UINT32_MAX)
1644                                 preferred = UINT32_MAX;
1645
1646                         cinfo.ifa_prefered = preferred;
1647                 }
1648
1649                 if (addr->valid_until) {
1650                         int64_t valid = addr->valid_until - now;
1651                         if (valid <= 0) {
1652                                 nlmsg_free(msg);
1653                                 return -1;
1654                         }
1655                         else if (valid > UINT32_MAX)
1656                                 valid = UINT32_MAX;
1657
1658                         cinfo.ifa_valid = valid;
1659                 }
1660
1661                 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1662
1663                 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1664                         nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1665         }
1666
1667         return system_rtnl_call(msg);
1668 }
1669
1670 int system_add_address(struct device *dev, struct device_addr *addr)
1671 {
1672         return system_addr(dev, addr, RTM_NEWADDR);
1673 }
1674
1675 int system_del_address(struct device *dev, struct device_addr *addr)
1676 {
1677         return system_addr(dev, addr, RTM_DELADDR);
1678 }
1679
1680 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1681 {
1682         int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1683         bool have_gw;
1684         unsigned int flags = 0;
1685
1686         if (alen == 4)
1687                 have_gw = !!route->nexthop.in.s_addr;
1688         else
1689                 have_gw = route->nexthop.in6.s6_addr32[0] ||
1690                         route->nexthop.in6.s6_addr32[1] ||
1691                         route->nexthop.in6.s6_addr32[2] ||
1692                         route->nexthop.in6.s6_addr32[3];
1693
1694         unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
1695                         ? route->table : RT_TABLE_MAIN;
1696
1697         struct rtmsg rtm = {
1698                 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1699                 .rtm_dst_len = route->mask,
1700                 .rtm_src_len = route->sourcemask,
1701                 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
1702                 .rtm_protocol = (route->flags & DEVADDR_KERNEL) ? RTPROT_KERNEL : RTPROT_STATIC,
1703                 .rtm_scope = RT_SCOPE_NOWHERE,
1704                 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
1705                 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
1706         };
1707         struct nl_msg *msg;
1708
1709         if (cmd == RTM_NEWROUTE) {
1710                 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1711
1712                 if (!dev) { // Add null-route
1713                         rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1714                         rtm.rtm_type = RTN_UNREACHABLE;
1715                 }
1716                 else
1717                         rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
1718         }
1719
1720         if (route->flags & DEVROUTE_TYPE) {
1721                 rtm.rtm_type = route->type;
1722                 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
1723                         if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
1724                             rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
1725                                 rtm.rtm_table = RT_TABLE_LOCAL;
1726                 }
1727
1728                 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
1729                         rtm.rtm_scope = RT_SCOPE_HOST;
1730                 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
1731                                 rtm.rtm_type == RTN_ANYCAST) {
1732                         rtm.rtm_scope = RT_SCOPE_LINK;
1733                 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
1734                                 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY) {
1735                         rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1736                         dev = NULL;
1737                 }
1738         }
1739
1740         msg = nlmsg_alloc_simple(cmd, flags);
1741         if (!msg)
1742                 return -1;
1743
1744         nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1745
1746         if (route->mask)
1747                 nla_put(msg, RTA_DST, alen, &route->addr);
1748
1749         if (route->sourcemask) {
1750                 if (rtm.rtm_family == AF_INET)
1751                         nla_put(msg, RTA_PREFSRC, alen, &route->source);
1752                 else
1753                         nla_put(msg, RTA_SRC, alen, &route->source);
1754         }
1755
1756         if (route->metric > 0)
1757                 nla_put_u32(msg, RTA_PRIORITY, route->metric);
1758
1759         if (have_gw)
1760                 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
1761
1762         if (dev)
1763                 nla_put_u32(msg, RTA_OIF, dev->ifindex);
1764
1765         if (table >= 256)
1766                 nla_put_u32(msg, RTA_TABLE, table);
1767
1768         if (route->flags & DEVROUTE_MTU) {
1769                 struct nlattr *metrics;
1770
1771                 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
1772                         goto nla_put_failure;
1773
1774                 nla_put_u32(msg, RTAX_MTU, route->mtu);
1775
1776                 nla_nest_end(msg, metrics);
1777         }
1778
1779         return system_rtnl_call(msg);
1780
1781 nla_put_failure:
1782         nlmsg_free(msg);
1783         return -ENOMEM;
1784 }
1785
1786 int system_add_route(struct device *dev, struct device_route *route)
1787 {
1788         return system_rt(dev, route, RTM_NEWROUTE);
1789 }
1790
1791 int system_del_route(struct device *dev, struct device_route *route)
1792 {
1793         return system_rt(dev, route, RTM_DELROUTE);
1794 }
1795
1796 int system_flush_routes(void)
1797 {
1798         const char *names[] = {
1799                 "/proc/sys/net/ipv4/route/flush",
1800                 "/proc/sys/net/ipv6/route/flush"
1801         };
1802         int fd, i;
1803
1804         for (i = 0; i < ARRAY_SIZE(names); i++) {
1805                 fd = open(names[i], O_WRONLY);
1806                 if (fd < 0)
1807                         continue;
1808
1809                 if (write(fd, "-1", 2)) {}
1810                 close(fd);
1811         }
1812         return 0;
1813 }
1814
1815 bool system_resolve_rt_type(const char *type, unsigned int *id)
1816 {
1817         return system_rtn_aton(type, id);
1818 }
1819
1820 bool system_resolve_rt_table(const char *name, unsigned int *id)
1821 {
1822         FILE *f;
1823         char *e, buf[128];
1824         unsigned int n, table = RT_TABLE_UNSPEC;
1825
1826         /* first try to parse table as number */
1827         if ((n = strtoul(name, &e, 0)) > 0 && !*e)
1828                 table = n;
1829
1830         /* handle well known aliases */
1831         else if (!strcmp(name, "default"))
1832                 table = RT_TABLE_DEFAULT;
1833         else if (!strcmp(name, "main"))
1834                 table = RT_TABLE_MAIN;
1835         else if (!strcmp(name, "local"))
1836                 table = RT_TABLE_LOCAL;
1837
1838         /* try to look up name in /etc/iproute2/rt_tables */
1839         else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
1840         {
1841                 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
1842                 {
1843                         if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
1844                                 continue;
1845
1846                         n = strtoul(e, NULL, 10);
1847                         e = strtok(NULL, " \t\n");
1848
1849                         if (e && !strcmp(e, name))
1850                         {
1851                                 table = n;
1852                                 break;
1853                         }
1854                 }
1855
1856                 fclose(f);
1857         }
1858
1859         if (table == RT_TABLE_UNSPEC)
1860                 return false;
1861
1862         *id = table;
1863         return true;
1864 }
1865
1866 bool system_is_default_rt_table(unsigned int id)
1867 {
1868         return (id == RT_TABLE_MAIN);
1869 }
1870
1871 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
1872 {
1873         char *e;
1874         unsigned int n;
1875
1876         if (!strcmp(filter, "strict"))
1877                 n = 1;
1878         else if (!strcmp(filter, "loose"))
1879                 n = 2;
1880         else {
1881                 n = strtoul(filter, &e, 0);
1882                 if (*e || e == filter || n > 2)
1883                         return false;
1884         }
1885
1886         *id = n;
1887         return true;
1888 }
1889
1890 static int system_iprule(struct iprule *rule, int cmd)
1891 {
1892         int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
1893
1894         struct nl_msg *msg;
1895         struct rtmsg rtm = {
1896                 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1897                 .rtm_protocol = RTPROT_STATIC,
1898                 .rtm_scope = RT_SCOPE_UNIVERSE,
1899                 .rtm_table = RT_TABLE_UNSPEC,
1900                 .rtm_type = RTN_UNSPEC,
1901                 .rtm_flags = 0,
1902         };
1903
1904         if (cmd == RTM_NEWRULE)
1905                 rtm.rtm_type = RTN_UNICAST;
1906
1907         if (rule->invert)
1908                 rtm.rtm_flags |= FIB_RULE_INVERT;
1909
1910         if (rule->flags & IPRULE_SRC)
1911                 rtm.rtm_src_len = rule->src_mask;
1912
1913         if (rule->flags & IPRULE_DEST)
1914                 rtm.rtm_dst_len = rule->dest_mask;
1915
1916         if (rule->flags & IPRULE_TOS)
1917                 rtm.rtm_tos = rule->tos;
1918
1919         if (rule->flags & IPRULE_LOOKUP) {
1920                 if (rule->lookup < 256)
1921                         rtm.rtm_table = rule->lookup;
1922         }
1923
1924         if (rule->flags & IPRULE_ACTION)
1925                 rtm.rtm_type = rule->action;
1926         else if (rule->flags & IPRULE_GOTO)
1927                 rtm.rtm_type = FR_ACT_GOTO;
1928         else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
1929                 rtm.rtm_type = FR_ACT_NOP;
1930
1931         msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
1932
1933         if (!msg)
1934                 return -1;
1935
1936         nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1937
1938         if (rule->flags & IPRULE_IN)
1939                 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
1940
1941         if (rule->flags & IPRULE_OUT)
1942                 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
1943
1944         if (rule->flags & IPRULE_SRC)
1945                 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
1946
1947         if (rule->flags & IPRULE_DEST)
1948                 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
1949
1950         if (rule->flags & IPRULE_PRIORITY)
1951                 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
1952         else if (cmd == RTM_NEWRULE)
1953                 nla_put_u32(msg, FRA_PRIORITY, rule->order);
1954
1955         if (rule->flags & IPRULE_FWMARK)
1956                 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
1957
1958         if (rule->flags & IPRULE_FWMASK)
1959                 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
1960
1961         if (rule->flags & IPRULE_LOOKUP) {
1962                 if (rule->lookup >= 256)
1963                         nla_put_u32(msg, FRA_TABLE, rule->lookup);
1964         }
1965
1966         if (rule->flags & IPRULE_GOTO)
1967                 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
1968
1969         return system_rtnl_call(msg);
1970 }
1971
1972 int system_add_iprule(struct iprule *rule)
1973 {
1974         return system_iprule(rule, RTM_NEWRULE);
1975 }
1976
1977 int system_del_iprule(struct iprule *rule)
1978 {
1979         return system_iprule(rule, RTM_DELRULE);
1980 }
1981
1982 int system_flush_iprules(void)
1983 {
1984         int rv = 0;
1985         struct iprule rule;
1986
1987         system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
1988         system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
1989
1990         memset(&rule, 0, sizeof(rule));
1991
1992
1993         rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
1994
1995         rule.priority = 0;
1996         rule.lookup = RT_TABLE_LOCAL;
1997         rv |= system_iprule(&rule, RTM_NEWRULE);
1998
1999         rule.priority = 32766;
2000         rule.lookup = RT_TABLE_MAIN;
2001         rv |= system_iprule(&rule, RTM_NEWRULE);
2002
2003         rule.priority = 32767;
2004         rule.lookup = RT_TABLE_DEFAULT;
2005         rv |= system_iprule(&rule, RTM_NEWRULE);
2006
2007
2008         rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2009
2010         rule.priority = 0;
2011         rule.lookup = RT_TABLE_LOCAL;
2012         rv |= system_iprule(&rule, RTM_NEWRULE);
2013
2014         rule.priority = 32766;
2015         rule.lookup = RT_TABLE_MAIN;
2016         rv |= system_iprule(&rule, RTM_NEWRULE);
2017
2018         return rv;
2019 }
2020
2021 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2022 {
2023         return system_rtn_aton(action, id);
2024 }
2025
2026 time_t system_get_rtime(void)
2027 {
2028         struct timespec ts;
2029         struct timeval tv;
2030
2031         if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2032                 return ts.tv_sec;
2033
2034         if (gettimeofday(&tv, NULL) == 0)
2035                 return tv.tv_sec;
2036
2037         return 0;
2038 }
2039
2040 #ifndef IP_DF
2041 #define IP_DF       0x4000
2042 #endif
2043
2044 static int tunnel_ioctl(const char *name, int cmd, void *p)
2045 {
2046         struct ifreq ifr;
2047
2048         memset(&ifr, 0, sizeof(ifr));
2049         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
2050         ifr.ifr_ifru.ifru_data = p;
2051         return ioctl(sock_ioctl, cmd, &ifr);
2052 }
2053
2054 #ifdef IFLA_IPTUN_MAX
2055 #define IP6_FLOWINFO_TCLASS     htonl(0x0FF00000)
2056 static int system_add_gre_tunnel(const char *name, const char *kind,
2057                                  const unsigned int link, struct blob_attr **tb, bool v6)
2058 {
2059         struct nl_msg *nlm;
2060         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2061         struct blob_attr *cur;
2062         uint32_t ikey = 0, okey = 0, flags = 0, flowinfo = 0;
2063         uint16_t iflags = 0, oflags = 0;
2064         uint8_t tos = 0;
2065         int ret = 0, ttl = 64;
2066
2067         nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2068         if (!nlm)
2069                 return -1;
2070
2071         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2072         nla_put_string(nlm, IFLA_IFNAME, name);
2073
2074         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2075         if (!linkinfo) {
2076                 ret = -ENOMEM;
2077                 goto failure;
2078         }
2079
2080         nla_put_string(nlm, IFLA_INFO_KIND, kind);
2081         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2082         if (!infodata) {
2083                 ret = -ENOMEM;
2084                 goto failure;
2085         }
2086
2087         if (link)
2088                 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2089
2090         if ((cur = tb[TUNNEL_ATTR_TTL]))
2091                 ttl = blobmsg_get_u32(cur);
2092
2093         nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2094
2095         if ((cur = tb[TUNNEL_ATTR_TOS])) {
2096                 char *str = blobmsg_get_string(cur);
2097                 if (strcmp(str, "inherit")) {
2098                         unsigned uval;
2099
2100                         if (!system_tos_aton(str, &uval)) {
2101                                 ret = -EINVAL;
2102                                 goto failure;
2103                         }
2104
2105                         if (v6)
2106                                 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2107                         else
2108                                 tos = uval;
2109                 } else {
2110                         if (v6)
2111                                 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
2112                         else
2113                                 tos = 1;
2114                 }
2115         }
2116
2117         if ((cur = tb[TUNNEL_ATTR_INFO]) && (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)) {
2118                 uint8_t icsum, ocsum, iseqno, oseqno;
2119                 if (sscanf(blobmsg_get_string(cur), "%u,%u,%hhu,%hhu,%hhu,%hhu",
2120                         &ikey, &okey, &icsum, &ocsum, &iseqno, &oseqno) < 6) {
2121                         ret = -EINVAL;
2122                         goto failure;
2123                 }
2124
2125                 if (ikey)
2126                         iflags |= GRE_KEY;
2127
2128                 if (okey)
2129                         oflags |= GRE_KEY;
2130
2131                 if (icsum)
2132                         iflags |= GRE_CSUM;
2133
2134                 if (ocsum)
2135                         oflags |= GRE_CSUM;
2136
2137                 if (iseqno)
2138                         iflags |= GRE_SEQ;
2139
2140                 if (oseqno)
2141                         oflags |= GRE_SEQ;
2142         }
2143
2144         if (v6) {
2145                 struct in6_addr in6buf;
2146                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2147                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2148                                 ret = -EINVAL;
2149                                 goto failure;
2150                         }
2151                         nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2152                 }
2153
2154                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2155                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2156                                 ret = -EINVAL;
2157                                 goto failure;
2158                         }
2159                         nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2160                 }
2161                 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, 4);
2162
2163                 if (flowinfo)
2164                         nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2165
2166                 if (flags)
2167                         nla_put_u32(nlm, IFLA_GRE_FLAGS, flags);
2168         } else {
2169                 struct in_addr inbuf;
2170                 bool set_df = true;
2171
2172                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2173                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2174                                 ret = -EINVAL;
2175                                 goto failure;
2176                         }
2177                         nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2178                 }
2179
2180                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2181                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2182                                 ret = -EINVAL;
2183                                 goto failure;
2184                         }
2185                         nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2186
2187                         if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2188                                 if (!okey) {
2189                                         okey = inbuf.s_addr;
2190                                         oflags |= GRE_KEY;
2191                                 }
2192
2193                                 if (!ikey) {
2194                                         ikey = inbuf.s_addr;
2195                                         iflags |= GRE_KEY;
2196                                 }
2197                         }
2198                 }
2199
2200                 if ((cur = tb[TUNNEL_ATTR_DF]))
2201                         set_df = blobmsg_get_bool(cur);
2202
2203                 /* ttl !=0 and nopmtudisc are incompatible */
2204                 if (ttl && !set_df) {
2205                         ret = -EINVAL;
2206                         goto failure;
2207                 }
2208
2209                 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2210
2211                 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2212         }
2213
2214         if (oflags)
2215                 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2216
2217         if (iflags)
2218                 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2219
2220         if (okey)
2221                 nla_put_u32(nlm, IFLA_GRE_OKEY, okey);
2222
2223         if (ikey)
2224                 nla_put_u32(nlm, IFLA_GRE_IKEY, ikey);
2225
2226         nla_nest_end(nlm, infodata);
2227         nla_nest_end(nlm, linkinfo);
2228
2229         return system_rtnl_call(nlm);
2230
2231 failure:
2232         nlmsg_free(nlm);
2233         return ret;
2234 }
2235 #endif
2236
2237 #ifdef IFLA_VTI_MAX
2238 static int system_add_vti_tunnel(const char *name, const char *kind,
2239                                  const unsigned int link, struct blob_attr **tb, bool v6)
2240 {
2241         struct nl_msg *nlm;
2242         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2243         struct blob_attr *cur;
2244         uint32_t ikey = 0, okey = 0;
2245         int ret = 0;
2246
2247         nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2248         if (!nlm)
2249                 return -1;
2250
2251         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2252         nla_put_string(nlm, IFLA_IFNAME, name);
2253
2254         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2255         if (!linkinfo) {
2256                 ret = -ENOMEM;
2257                 goto failure;
2258         }
2259
2260         nla_put_string(nlm, IFLA_INFO_KIND, kind);
2261         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2262         if (!infodata) {
2263                 ret = -ENOMEM;
2264                 goto failure;
2265         }
2266
2267         if (link)
2268                 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2269
2270         if ((cur = tb[TUNNEL_ATTR_INFO]) && (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)) {
2271                 if (sscanf(blobmsg_get_string(cur), "%u,%u",
2272                         &ikey, &okey) < 2) {
2273                         ret = -EINVAL;
2274                         goto failure;
2275                 }
2276         }
2277
2278         if (v6) {
2279                 struct in6_addr in6buf;
2280                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2281                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2282                                 ret = -EINVAL;
2283                                 goto failure;
2284                         }
2285                         nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2286                 }
2287
2288                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2289                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2290                                 ret = -EINVAL;
2291                                 goto failure;
2292                         }
2293                         nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2294                 }
2295
2296         } else {
2297                 struct in_addr inbuf;
2298
2299                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2300                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2301                                 ret = -EINVAL;
2302                                 goto failure;
2303                         }
2304                         nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2305                 }
2306
2307                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2308                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2309                                 ret = -EINVAL;
2310                                 goto failure;
2311                         }
2312                         nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2313                 }
2314
2315         }
2316
2317         if (okey)
2318                 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2319
2320         if (ikey)
2321                 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2322
2323         nla_nest_end(nlm, infodata);
2324         nla_nest_end(nlm, linkinfo);
2325
2326         return system_rtnl_call(nlm);
2327
2328 failure:
2329         nlmsg_free(nlm);
2330         return ret;
2331 }
2332 #endif
2333
2334 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
2335 {
2336         struct blob_attr *cur;
2337         bool set_df = true;
2338         struct ip_tunnel_parm p  = {
2339                 .link = link,
2340                 .iph = {
2341                         .version = 4,
2342                         .ihl = 5,
2343                         .protocol = proto,
2344                 }
2345         };
2346
2347         if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
2348                         inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
2349                 return -EINVAL;
2350
2351         if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
2352                         inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
2353                 return -EINVAL;
2354
2355         if ((cur = tb[TUNNEL_ATTR_DF]))
2356                 set_df = blobmsg_get_bool(cur);
2357
2358         if ((cur = tb[TUNNEL_ATTR_TTL]))
2359                 p.iph.ttl = blobmsg_get_u32(cur);
2360
2361         if ((cur = tb[TUNNEL_ATTR_TOS])) {
2362                 char *str = blobmsg_get_string(cur);
2363                 if (strcmp(str, "inherit")) {
2364                         unsigned uval;
2365
2366                         if (!system_tos_aton(str, &uval))
2367                                 return -EINVAL;
2368
2369                         p.iph.tos = uval;
2370                 } else
2371                         p.iph.tos = 1;
2372         }
2373
2374         p.iph.frag_off = set_df ? htons(IP_DF) : 0;
2375         /* ttl !=0 and nopmtudisc are incompatible */
2376         if (p.iph.ttl && p.iph.frag_off == 0)
2377                 return -EINVAL;
2378
2379         strncpy(p.name, name, sizeof(p.name));
2380
2381         switch (p.iph.protocol) {
2382         case IPPROTO_IPIP:
2383                 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
2384         case IPPROTO_IPV6:
2385                 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
2386         default:
2387                 break;
2388         }
2389         return -1;
2390 }
2391
2392 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
2393 {
2394         struct blob_attr *cur;
2395         const char *str;
2396
2397         if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2398                 return -EINVAL;
2399         str = blobmsg_data(cur);
2400
2401         if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
2402             !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
2403             !strcmp(str, "vtiip") || !strcmp(str, "vtiip6"))
2404                 return system_link_del(name);
2405         else
2406                 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
2407 }
2408
2409 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
2410 {
2411         struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2412
2413         blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2414                 blob_data(attr), blob_len(attr));
2415
2416         return __system_del_ip_tunnel(name, tb);
2417 }
2418
2419 int system_update_ipv6_mtu(struct device *dev, int mtu)
2420 {
2421         int ret = -1;
2422         char buf[64];
2423         snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
2424                         dev->ifname);
2425
2426         int fd = open(buf, O_RDWR);
2427
2428         if (!mtu) {
2429                 ssize_t len = read(fd, buf, sizeof(buf) - 1);
2430                 if (len < 0)
2431                         goto out;
2432
2433                 buf[len] = 0;
2434                 ret = atoi(buf);
2435         } else {
2436                 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
2437                         ret = mtu;
2438         }
2439
2440 out:
2441         close(fd);
2442         return ret;
2443 }
2444
2445 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
2446 {
2447         struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2448         struct blob_attr *cur;
2449         const char *str;
2450
2451         blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2452                 blob_data(attr), blob_len(attr));
2453
2454         __system_del_ip_tunnel(name, tb);
2455
2456         if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2457                 return -EINVAL;
2458         str = blobmsg_data(cur);
2459
2460         unsigned int ttl = 0;
2461         if ((cur = tb[TUNNEL_ATTR_TTL])) {
2462                 ttl = blobmsg_get_u32(cur);
2463                 if (ttl > 255)
2464                         return -EINVAL;
2465         }
2466
2467         unsigned int link = 0;
2468         if ((cur = tb[TUNNEL_ATTR_LINK])) {
2469                 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
2470                 if (!iface)
2471                         return -EINVAL;
2472
2473                 if (iface->l3_dev.dev)
2474                         link = iface->l3_dev.dev->ifindex;
2475         }
2476
2477         if (!strcmp(str, "sit")) {
2478                 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
2479                         return -1;
2480
2481 #ifdef SIOCADD6RD
2482                 if ((cur = tb[TUNNEL_ATTR_6RD_PREFIX])) {
2483                         unsigned int mask;
2484                         struct ip_tunnel_6rd p6;
2485
2486                         memset(&p6, 0, sizeof(p6));
2487
2488                         if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
2489                                                 &p6.prefix, &mask) || mask > 128)
2490                                 return -EINVAL;
2491                         p6.prefixlen = mask;
2492
2493                         if ((cur = tb[TUNNEL_ATTR_6RD_RELAY_PREFIX])) {
2494                                 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
2495                                                         &p6.relay_prefix, &mask) || mask > 32)
2496                                         return -EINVAL;
2497                                 p6.relay_prefixlen = mask;
2498                         }
2499
2500                         if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
2501                                 __system_del_ip_tunnel(name, tb);
2502                                 return -1;
2503                         }
2504                 }
2505 #endif
2506 #ifdef IFLA_IPTUN_MAX
2507         } else if (!strcmp(str, "ipip6")) {
2508                 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2509                                 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2510                 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2511                 int ret = 0;
2512
2513                 if (!nlm)
2514                         return -1;
2515
2516                 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2517                 nla_put_string(nlm, IFLA_IFNAME, name);
2518
2519                 if (link)
2520                         nla_put_u32(nlm, IFLA_LINK, link);
2521
2522                 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2523                 if (!linkinfo) {
2524                         ret = -ENOMEM;
2525                         goto failure;
2526                 }
2527                 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2528                 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2529                 if (!infodata) {
2530                         ret = -ENOMEM;
2531                         goto failure;
2532                 }
2533
2534                 if (link)
2535                         nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2536
2537                 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2538                 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2539                 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, 4);
2540
2541                 struct in6_addr in6buf;
2542                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2543                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2544                                 ret = -EINVAL;
2545                                 goto failure;
2546                         }
2547                         nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2548                 }
2549
2550                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2551                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2552                                 ret = -EINVAL;
2553                                 goto failure;
2554                         }
2555                         nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2556                 }
2557
2558 #ifdef IFLA_IPTUN_FMR_MAX
2559                 if ((cur = tb[TUNNEL_ATTR_FMRS])) {
2560                         struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2561
2562                         struct blob_attr *fmr;
2563                         unsigned rem, fmrcnt = 0;
2564                         blobmsg_for_each_attr(fmr, cur, rem) {
2565                                 if (blobmsg_type(fmr) != BLOBMSG_TYPE_STRING)
2566                                         continue;
2567
2568                                 unsigned ip4len, ip6len, ealen, offset = 6;
2569                                 char ip6buf[48];
2570                                 char ip4buf[16];
2571
2572                                 if (sscanf(blobmsg_get_string(fmr), "%47[^/]/%u,%15[^/]/%u,%u,%u",
2573                                                 ip6buf, &ip6len, ip4buf, &ip4len, &ealen, &offset) < 5) {
2574                                         ret = -EINVAL;
2575                                         goto failure;
2576                                 }
2577
2578                                 struct in6_addr ip6prefix;
2579                                 struct in_addr ip4prefix;
2580                                 if (inet_pton(AF_INET6, ip6buf, &ip6prefix) != 1 ||
2581                                                 inet_pton(AF_INET, ip4buf, &ip4prefix) != 1) {
2582                                         ret = -EINVAL;
2583                                         goto failure;
2584                                 }
2585
2586                                 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2587
2588                                 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2589                                 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2590                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2591                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2592                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2593                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2594
2595                                 nla_nest_end(nlm, rule);
2596                         }
2597
2598                         nla_nest_end(nlm, fmrs);
2599                 }
2600 #endif
2601
2602                 nla_nest_end(nlm, infodata);
2603                 nla_nest_end(nlm, linkinfo);
2604
2605                 return system_rtnl_call(nlm);
2606 failure:
2607                 nlmsg_free(nlm);
2608                 return ret;
2609         } else if (!strcmp(str, "greip")) {
2610                 return system_add_gre_tunnel(name, "gre", link, tb, false);
2611         } else if (!strcmp(str, "gretapip"))  {
2612                 return system_add_gre_tunnel(name, "gretap", link, tb, false);
2613         } else if (!strcmp(str, "greip6")) {
2614                 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
2615         } else if (!strcmp(str, "gretapip6")) {
2616                 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
2617 #ifdef IFLA_VTI_MAX
2618         } else if (!strcmp(str, "vtiip")) {
2619                 return system_add_vti_tunnel(name, "vti", link, tb, false);
2620         } else if (!strcmp(str, "vtiip6")) {
2621                 return system_add_vti_tunnel(name, "vti6", link, tb, true);
2622 #endif
2623 #endif
2624         } else if (!strcmp(str, "ipip")) {
2625                 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
2626         }
2627         else
2628                 return -EINVAL;
2629
2630         return 0;
2631 }