src/inet.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2013  Intel Corporation. All rights reserved.
   6  *  Copyright (C) 2003-2005  Go-Core Project
   7  *  Copyright (C) 2003-2006  Helsinki University of Technology
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License version 2 as
  11  *  published by the Free Software Foundation.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  21  *
  22  */
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #define _GNU_SOURCE
  29 #include <stdio.h>
  30 #include <errno.h>
  31 #include <unistd.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34 #include <sys/stat.h>
  35 #include <sys/ioctl.h>
  36 #include <sys/socket.h>
  37 #include <linux/sockios.h>
  38 #include <netdb.h>
  39 #include <arpa/inet.h>
  40 #include <net/route.h>
  41 #include <net/ethernet.h>
  42 #include <net/if.h>
  43 #include <net/if_arp.h>
  44 #include <netinet/icmp6.h>
  45 #include <fcntl.h>
  46 #include <linux/if_tun.h>
  47 #include <ctype.h>
  48 #include <ifaddrs.h>
  49 #include <linux/fib_rules.h>
  50
  51 #include "connman.h"
  52 #include <gdhcp/gdhcp.h>
  53
  54 #define NLMSG_TAIL(nmsg)                                \
  55         ((struct rtattr *) (((uint8_t*) (nmsg)) +       \
  56         NLMSG_ALIGN((nmsg)->nlmsg_len)))
  57
  58 int __connman_inet_rtnl_addattr_l(struct nlmsghdr *n, size_t max_length,
  59                                 int type, const void *data, size_t data_length)
  60 {
  61         size_t length;
  62         struct rtattr *rta;
  63
  64         length = RTA_LENGTH(data_length);
  65
  66         if (NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(length) > max_length)
  67                 return -E2BIG;
  68
  69         rta = NLMSG_TAIL(n);
  70         rta->rta_type = type;
  71         rta->rta_len = length;
  72         memcpy(RTA_DATA(rta), data, data_length);
  73         n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(length);
  74
  75         return 0;
  76 }
  77
  78 int __connman_inet_modify_address(int cmd, int flags,
  79                                 int index, int family,
  80                                 const char *address,
  81                                 const char *peer,
  82                                 unsigned char prefixlen,
  83                                 const char *broadcast)
  84 {
  85         uint8_t request[NLMSG_ALIGN(sizeof(struct nlmsghdr)) +
  86                         NLMSG_ALIGN(sizeof(struct ifaddrmsg)) +
  87                         RTA_LENGTH(sizeof(struct in6_addr)) +
  88                         RTA_LENGTH(sizeof(struct in6_addr))];
  89
  90         struct nlmsghdr *header;
  91         struct sockaddr_nl nl_addr;
  92         struct ifaddrmsg *ifaddrmsg;
  93         struct in6_addr ipv6_addr;
  94         struct in_addr ipv4_addr, ipv4_dest, ipv4_bcast;
  95         int sk, err;
  96
  97         DBG("cmd %#x flags %#x index %d family %d address %s peer %s "
  98                 "prefixlen %hhu broadcast %s", cmd, flags, index, family,
  99                 address, peer, prefixlen, broadcast);
 100
 101         if (!address)
 102                 return -EINVAL;
 103
 104         if (family != AF_INET && family != AF_INET6)
 105                 return -EINVAL;
 106
 107         memset(&request, 0, sizeof(request));
 108
 109         header = (struct nlmsghdr *)request;
 110         header->nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
 111         header->nlmsg_type = cmd;
 112         header->nlmsg_flags = NLM_F_REQUEST | flags;
 113         header->nlmsg_seq = 1;
 114
 115         ifaddrmsg = NLMSG_DATA(header);
 116         ifaddrmsg->ifa_family = family;
 117         ifaddrmsg->ifa_prefixlen = prefixlen;
 118         ifaddrmsg->ifa_flags = IFA_F_PERMANENT;
 119         ifaddrmsg->ifa_scope = RT_SCOPE_UNIVERSE;
 120         ifaddrmsg->ifa_index = index;
 121
 122         if (family == AF_INET) {
 123                 if (inet_pton(AF_INET, address, &ipv4_addr) < 1)
 124                         return -1;
 125
 126                 if (broadcast)
 127                         inet_pton(AF_INET, broadcast, &ipv4_bcast);
 128                 else
 129                         ipv4_bcast.s_addr = ipv4_addr.s_addr |
 130                                 htonl(0xfffffffflu >> prefixlen);
 131
 132                 if (peer) {
 133                         if (inet_pton(AF_INET, peer, &ipv4_dest) < 1)
 134                                 return -1;
 135
 136                         err = __connman_inet_rtnl_addattr_l(header,
 137                                                         sizeof(request),
 138                                                         IFA_ADDRESS,
 139                                                         &ipv4_dest,
 140                                                         sizeof(ipv4_dest));
 141                         if (err < 0)
 142                                 return err;
 143                 }
 144
 145                 err = __connman_inet_rtnl_addattr_l(header,
 146                                                 sizeof(request),
 147                                                 IFA_LOCAL,
 148                                                 &ipv4_addr,
 149                                                 sizeof(ipv4_addr));
 150                 if (err < 0)
 151                         return err;
 152
 153                 err = __connman_inet_rtnl_addattr_l(header,
 154                                                 sizeof(request),
 155                                                 IFA_BROADCAST,
 156                                                 &ipv4_bcast,
 157                                                 sizeof(ipv4_bcast));
 158                 if (err < 0)
 159                         return err;
 160
 161         } else if (family == AF_INET6) {
 162                 if (inet_pton(AF_INET6, address, &ipv6_addr) < 1)
 163                         return -1;
 164
 165                 err = __connman_inet_rtnl_addattr_l(header,
 166                                                 sizeof(request),
 167                                                 IFA_LOCAL,
 168                                                 &ipv6_addr,
 169                                                 sizeof(ipv6_addr));
 170                 if (err < 0)
 171                         return err;
 172         }
 173
 174         sk = socket(AF_NETLINK, SOCK_DGRAM | SOCK_CLOEXEC, NETLINK_ROUTE);
 175         if (sk < 0)
 176                 return -errno;
 177
 178         memset(&nl_addr, 0, sizeof(nl_addr));
 179         nl_addr.nl_family = AF_NETLINK;
 180
 181         if ((err = sendto(sk, request, header->nlmsg_len, 0,
 182                         (struct sockaddr *) &nl_addr, sizeof(nl_addr))) < 0)
 183                 goto done;
 184
 185         err = 0;
 186
 187 done:
 188         close(sk);
 189
 190         return err;
 191 }
 192
 193 int connman_inet_ifindex(const char *name)
 194 {
 195         struct ifreq ifr;
 196         int sk, err;
 197
 198         if (!name)
 199                 return -1;
 200
 201         sk = socket(PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
 202         if (sk < 0)
 203                 return -1;
 204
 205         memset(&ifr, 0, sizeof(ifr));
 206         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
 207
 208         err = ioctl(sk, SIOCGIFINDEX, &ifr);
 209
 210         close(sk);
 211
 212         if (err < 0)
 213                 return -1;
 214
 215         return ifr.ifr_ifindex;
 216 }
 217
 218 char *connman_inet_ifname(int index)
 219 {
 220         struct ifreq ifr;
 221         int sk, err;
 222
 223         if (index < 0)
 224                 return NULL;
 225
 226         sk = socket(PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
 227         if (sk < 0)
 228                 return NULL;
 229
 230         memset(&ifr, 0, sizeof(ifr));
 231         ifr.ifr_ifindex = index;
 232
 233         err = ioctl(sk, SIOCGIFNAME, &ifr);
 234
 235         close(sk);
 236
 237         if (err < 0)
 238                 return NULL;
 239
 240         return g_strdup(ifr.ifr_name);
 241 }
 242
 243 int connman_inet_ifup(int index)
 244 {
 245         struct ifreq ifr;
 246         int sk, err;
 247
 248         sk = socket(PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
 249         if (sk < 0)
 250                 return -errno;
 251
 252         memset(&ifr, 0, sizeof(ifr));
 253         ifr.ifr_ifindex = index;
 254
 255         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
 256                 err = -errno;
 257                 goto done;
 258         }
 259
 260         if (ioctl(sk, SIOCGIFFLAGS, &ifr) < 0) {
 261                 err = -errno;
 262                 goto done;
 263         }
 264
 265         if (ifr.ifr_flags & IFF_UP) {
 266                 err = -EALREADY;
 267                 goto done;
 268         }
 269
 270         ifr.ifr_flags |= (IFF_UP|IFF_DYNAMIC);
 271
 272         if (ioctl(sk, SIOCSIFFLAGS, &ifr) < 0) {
 273                 err = -errno;
 274                 goto done;
 275         }
 276
 277         err = 0;
 278
 279 done:
 280         close(sk);
 281
 282         return err;
 283 }
 284
 285 int connman_inet_ifdown(int index)
 286 {
 287         struct ifreq ifr, addr_ifr;
 288         struct sockaddr_in *addr;
 289         int sk, err;
 290
 291         sk = socket(PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
 292         if (sk < 0)
 293                 return -errno;
 294
 295         memset(&ifr, 0, sizeof(ifr));
 296         ifr.ifr_ifindex = index;
 297
 298         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
 299                 err = -errno;
 300                 goto done;
 301         }
 302
 303         if (ioctl(sk, SIOCGIFFLAGS, &ifr) < 0) {
 304                 err = -errno;
 305                 goto done;
 306         }
 307
 308         memset(&addr_ifr, 0, sizeof(addr_ifr));
 309         memcpy(&addr_ifr.ifr_name, &ifr.ifr_name, sizeof(ifr.ifr_name) - 1);
 310         addr = (struct sockaddr_in *)&addr_ifr.ifr_addr;
 311         addr->sin_family = AF_INET;
 312         if (ioctl(sk, SIOCSIFADDR, &addr_ifr) < 0)
 313                 connman_warn("Could not clear IPv4 address index %d", index);
 314
 315         if (!(ifr.ifr_flags & IFF_UP)) {
 316                 err = -EALREADY;
 317                 goto done;
 318         }
 319
 320         ifr.ifr_flags = (ifr.ifr_flags & ~IFF_UP) | IFF_DYNAMIC;
 321
 322         if (ioctl(sk, SIOCSIFFLAGS, &ifr) < 0)
 323                 err = -errno;
 324         else
 325                 err = 0;
 326
 327 done:
 328         close(sk);
 329
 330         return err;
 331 }
 332
 333 #if defined TIZEN_EXT
 334 void connman_inet_update_device_ident(struct connman_device *device)
 335 {
 336         int index;
 337         enum connman_device_type type;
 338         char *ident = NULL, *addr = NULL;
 339
 340         index = connman_device_get_index(device);
 341         type = connman_device_get_type(device);
 342
 343         switch (type) {
 344         case CONNMAN_DEVICE_TYPE_UNKNOWN:
 345                 return;
 346         case CONNMAN_DEVICE_TYPE_ETHERNET:
 347         case CONNMAN_DEVICE_TYPE_GADGET:
 348         case CONNMAN_DEVICE_TYPE_WIFI:
 349                 addr = index2addr(index);
 350                 break;
 351         case CONNMAN_DEVICE_TYPE_BLUETOOTH:
 352         case CONNMAN_DEVICE_TYPE_CELLULAR:
 353         case CONNMAN_DEVICE_TYPE_GPS:
 354         case CONNMAN_DEVICE_TYPE_VENDOR:
 355                 break;
 356         }
 357
 358         switch (type) {
 359         case CONNMAN_DEVICE_TYPE_VENDOR:
 360         case CONNMAN_DEVICE_TYPE_GPS:
 361                 break;
 362         case CONNMAN_DEVICE_TYPE_ETHERNET:
 363         case CONNMAN_DEVICE_TYPE_GADGET:
 364                 ident = index2ident(index, NULL);
 365                 break;
 366         case CONNMAN_DEVICE_TYPE_WIFI:
 367                 ident = index2ident(index, NULL);
 368                 break;
 369         case CONNMAN_DEVICE_TYPE_BLUETOOTH:
 370                 break;
 371         case CONNMAN_DEVICE_TYPE_CELLULAR:
 372                 ident = index2ident(index, NULL);
 373                 break;
 374         }
 375
 376         if (ident != NULL) {
 377                 connman_device_set_ident(device, ident);
 378                 g_free(ident);
 379         }
 380
 381         if (addr != NULL) {
 382                 connman_device_set_string(device, "Address", addr);
 383                 g_free(addr);
 384         }
 385 }
 386 #endif
 387
 388 struct in6_ifreq {
 389         struct in6_addr ifr6_addr;
 390         __u32 ifr6_prefixlen;
 391         unsigned int ifr6_ifindex;
 392 };
 393
 394 int connman_inet_set_ipv6_address(int index,
 395                 struct connman_ipaddress *ipaddress)
 396 {
 397         int err;
 398         unsigned char prefix_len;
 399         const char *address;
 400
 401         if (!ipaddress->local)
 402                 return 0;
 403
 404         prefix_len = ipaddress->prefixlen;
 405         address = ipaddress->local;
 406
 407         DBG("index %d address %s prefix_len %d", index, address, prefix_len);
 408
 409         err = __connman_inet_modify_address(RTM_NEWADDR,
 410                                 NLM_F_REPLACE | NLM_F_ACK, index, AF_INET6,
 411                                 address, NULL, prefix_len, NULL);
 412         if (err < 0) {
 413                 connman_error("%s: %s", __func__, strerror(-err));
 414                 return err;
 415         }
 416
 417         return 0;
 418 }
 419
 420 int connman_inet_set_address(int index, struct connman_ipaddress *ipaddress)
 421 {
 422         int err;
 423         unsigned char prefix_len;
 424         const char *address, *broadcast, *peer;
 425
 426         if (!ipaddress->local)
 427                 return -1;
 428
 429         prefix_len = ipaddress->prefixlen;
 430         address = ipaddress->local;
 431         broadcast = ipaddress->broadcast;
 432         peer = ipaddress->peer;
 433
 434         DBG("index %d address %s prefix_len %d", index, address, prefix_len);
 435
 436         err = __connman_inet_modify_address(RTM_NEWADDR,
 437                                 NLM_F_REPLACE | NLM_F_ACK, index, AF_INET,
 438                                 address, peer, prefix_len, broadcast);
 439         if (err < 0) {
 440                 connman_error("%s: %s", __func__, strerror(-err));
 441                 return err;
 442         }
 443
 444         return 0;
 445 }
 446
 447 int connman_inet_clear_ipv6_address(int index, const char *address,
 448                                                         int prefix_len)
 449 {
 450         int err;
 451
 452         DBG("index %d address %s prefix_len %d", index, address, prefix_len);
 453
 454         if (!address)
 455                 return -EINVAL;
 456
 457         err = __connman_inet_modify_address(RTM_DELADDR, 0, index, AF_INET6,
 458                                 address, NULL, prefix_len, NULL);
 459         if (err < 0) {
 460                 connman_error("%s: %s", __func__, strerror(-err));
 461                 return err;
 462         }
 463
 464         return 0;
 465 }
 466
 467 int connman_inet_clear_address(int index, struct connman_ipaddress *ipaddress)
 468 {
 469         int err;
 470         unsigned char prefix_len;
 471         const char *address, *broadcast, *peer;
 472
 473         prefix_len = ipaddress->prefixlen;
 474         address = ipaddress->local;
 475         broadcast = ipaddress->broadcast;
 476         peer = ipaddress->peer;
 477
 478         DBG("index %d address %s prefix_len %d peer %s broadcast %s", index,
 479                 address, prefix_len, peer, broadcast);
 480
 481         if (!address)
 482                 return -EINVAL;
 483
 484         err = __connman_inet_modify_address(RTM_DELADDR, 0, index, AF_INET,
 485                                 address, peer, prefix_len, broadcast);
 486         if (err < 0) {
 487                 connman_error("%s: %s", __func__, strerror(-err));
 488                 return err;
 489         }
 490
 491         return 0;
 492 }
 493
 494 int connman_inet_add_host_route(int index, const char *host,
 495                                 const char *gateway)
 496 {
 497         return connman_inet_add_network_route(index, host, gateway, NULL);
 498 }
 499
 500 int connman_inet_del_host_route(int index, const char *host)
 501 {
 502         return connman_inet_del_network_route(index, host);
 503 }
 504
 505 int connman_inet_add_network_route(int index, const char *host,
 506                                         const char *gateway,
 507                                         const char *netmask)
 508 {
 509         struct ifreq ifr;
 510         struct rtentry rt;
 511         struct sockaddr_in addr;
 512         int sk, err = 0;
 513
 514         DBG("index %d host %s gateway %s netmask %s", index,
 515                 host, gateway, netmask);
 516
 517         sk = socket(PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
 518         if (sk < 0) {
 519                 err = -errno;
 520                 goto out;
 521         }
 522
 523         memset(&ifr, 0, sizeof(ifr));
 524         ifr.ifr_ifindex = index;
 525
 526         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
 527                 err = -errno;
 528                 close(sk);
 529                 goto out;
 530         }
 531
 532         DBG("ifname %s", ifr.ifr_name);
 533
 534         memset(&rt, 0, sizeof(rt));
 535         rt.rt_flags = RTF_UP;
 536         if (gateway)
 537                 rt.rt_flags |= RTF_GATEWAY;
 538         if (!netmask)
 539                 rt.rt_flags |= RTF_HOST;
 540
 541         memset(&addr, 0, sizeof(addr));
 542         addr.sin_family = AF_INET;
 543         addr.sin_addr.s_addr = inet_addr(host);
 544         memcpy(&rt.rt_dst, &addr, sizeof(rt.rt_dst));
 545
 546         memset(&addr, 0, sizeof(addr));
 547         addr.sin_family = AF_INET;
 548         if (gateway)
 549                 addr.sin_addr.s_addr = inet_addr(gateway);
 550         else
 551                 addr.sin_addr.s_addr = INADDR_ANY;
 552         memcpy(&rt.rt_gateway, &addr, sizeof(rt.rt_gateway));
 553
 554         memset(&addr, 0, sizeof(addr));
 555         addr.sin_family = AF_INET;
 556         addr.sin_addr.s_addr = INADDR_ANY;
 557         if (netmask)
 558                 addr.sin_addr.s_addr = inet_addr(netmask);
 559         else
 560                 addr.sin_addr.s_addr = INADDR_ANY;
 561         memcpy(&rt.rt_genmask, &addr, sizeof(rt.rt_genmask));
 562
 563         rt.rt_dev = ifr.ifr_name;
 564
 565         if (ioctl(sk, SIOCADDRT, &rt) < 0 && errno != EEXIST)
 566                 err = -errno;
 567
 568         close(sk);
 569
 570 out:
 571         if (err < 0)
 572                 connman_error("Adding host route failed (%s)",
 573                                                         strerror(-err));
 574
 575         return err;
 576 }
 577
 578 int connman_inet_del_network_route(int index, const char *host)
 579 {
 580         struct ifreq ifr;
 581         struct rtentry rt;
 582         struct sockaddr_in addr;
 583         int sk, err = 0;
 584
 585         DBG("index %d host %s", index, host);
 586
 587         sk = socket(PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
 588         if (sk < 0) {
 589                 err = -errno;
 590                 goto out;
 591         }
 592
 593         memset(&ifr, 0, sizeof(ifr));
 594         ifr.ifr_ifindex = index;
 595
 596         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
 597                 err = -errno;
 598                 close(sk);
 599                 goto out;
 600         }
 601
 602         DBG("ifname %s", ifr.ifr_name);
 603
 604         memset(&rt, 0, sizeof(rt));
 605         rt.rt_flags = RTF_UP | RTF_HOST;
 606
 607         memset(&addr, 0, sizeof(addr));
 608         addr.sin_family = AF_INET;
 609         addr.sin_addr.s_addr = inet_addr(host);
 610         memcpy(&rt.rt_dst, &addr, sizeof(rt.rt_dst));
 611
 612         rt.rt_dev = ifr.ifr_name;
 613
 614         if (ioctl(sk, SIOCDELRT, &rt) < 0 && errno != ESRCH)
 615                 err = -errno;
 616
 617         close(sk);
 618
 619 out:
 620         if (err < 0)
 621                 connman_error("Deleting host route failed (%s)",
 622                                                         strerror(-err));
 623
 624         return err;
 625 }
 626
 627 int connman_inet_del_ipv6_network_route(int index, const char *host,
 628                                                 unsigned char prefix_len)
 629 {
 630         struct in6_rtmsg rt;
 631         int sk, err = 0;
 632
 633         DBG("index %d host %s", index, host);
 634
 635         if (!host)
 636                 return -EINVAL;
 637
 638         memset(&rt, 0, sizeof(rt));
 639
 640         rt.rtmsg_dst_len = prefix_len;
 641
 642         if (inet_pton(AF_INET6, host, &rt.rtmsg_dst) < 0) {
 643                 err = -errno;
 644                 goto out;
 645         }
 646
 647         rt.rtmsg_flags = RTF_UP | RTF_HOST;
 648
 649         rt.rtmsg_metric = 1;
 650         rt.rtmsg_ifindex = index;
 651
 652         sk = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, 0);
 653         if (sk < 0) {
 654                 err = -errno;
 655                 goto out;
 656         }
 657
 658         if (ioctl(sk, SIOCDELRT, &rt) < 0 && errno != ESRCH)
 659                 err = -errno;
 660
 661         close(sk);
 662
 663 out:
 664         if (err < 0)
 665                 connman_error("Del IPv6 host route error (%s)",
 666                                                 strerror(-err));
 667
 668         return err;
 669 }
 670
 671 int connman_inet_del_ipv6_host_route(int index, const char *host)
 672 {
 673         return connman_inet_del_ipv6_network_route(index, host, 128);
 674 }
 675
 676 int connman_inet_add_ipv6_network_route(int index, const char *host,
 677                                         const char *gateway,
 678                                         unsigned char prefix_len)
 679 {
 680         struct in6_rtmsg rt;
 681         int sk, err = 0;
 682
 683         DBG("index %d host %s gateway %s", index, host, gateway);
 684
 685         if (!host)
 686                 return -EINVAL;
 687
 688         memset(&rt, 0, sizeof(rt));
 689
 690         rt.rtmsg_dst_len = prefix_len;
 691
 692         if (inet_pton(AF_INET6, host, &rt.rtmsg_dst) < 0) {
 693                 err = -errno;
 694                 goto out;
 695         }
 696
 697         rt.rtmsg_flags = RTF_UP | RTF_HOST;
 698
 699         if (gateway) {
 700                 rt.rtmsg_flags |= RTF_GATEWAY;
 701                 inet_pton(AF_INET6, gateway, &rt.rtmsg_gateway);
 702         }
 703
 704         rt.rtmsg_metric = 1;
 705         rt.rtmsg_ifindex = index;
 706
 707         sk = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, 0);
 708         if (sk < 0) {
 709                 err = -errno;
 710                 goto out;
 711         }
 712
 713         if (ioctl(sk, SIOCADDRT, &rt) < 0 && errno != EEXIST)
 714                 err = -errno;
 715
 716         close(sk);
 717
 718 out:
 719         if (err < 0)
 720                 connman_error("Set IPv6 host route error (%s)",
 721                                                 strerror(-err));
 722
 723         return err;
 724 }
 725
 726 int connman_inet_add_ipv6_host_route(int index, const char *host,
 727                                         const char *gateway)
 728 {
 729         return connman_inet_add_ipv6_network_route(index, host, gateway, 128);
 730 }
 731
 732 int connman_inet_clear_ipv6_gateway_address(int index, const char *gateway)
 733 {
 734         struct in6_rtmsg rt;
 735         int sk, err = 0;
 736
 737         DBG("index %d gateway %s", index, gateway);
 738
 739         if (!gateway)
 740                 return -EINVAL;
 741
 742         memset(&rt, 0, sizeof(rt));
 743
 744         if (inet_pton(AF_INET6, gateway, &rt.rtmsg_gateway) < 0) {
 745                 err = -errno;
 746                 goto out;
 747         }
 748
 749         rt.rtmsg_flags = RTF_UP | RTF_GATEWAY;
 750         rt.rtmsg_metric = 1;
 751         rt.rtmsg_dst_len = 0;
 752         rt.rtmsg_ifindex = index;
 753
 754         sk = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, 0);
 755         if (sk < 0) {
 756                 err = -errno;
 757                 goto out;
 758         }
 759
 760         if (ioctl(sk, SIOCDELRT, &rt) < 0 && errno != ESRCH)
 761                 err = -errno;
 762
 763         close(sk);
 764
 765 out:
 766         if (err < 0)
 767                 connman_error("Clear default IPv6 gateway error (%s)",
 768                                                 strerror(-err));
 769
 770         return err;
 771 }
 772
 773 int connman_inet_set_gateway_interface(int index)
 774 {
 775         struct ifreq ifr;
 776         struct rtentry rt;
 777         struct sockaddr_in addr;
 778         int sk, err = 0;
 779
 780         DBG("index %d", index);
 781
 782         sk = socket(PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
 783         if (sk < 0) {
 784                 err = -errno;
 785                 goto out;
 786         }
 787
 788         memset(&ifr, 0, sizeof(ifr));
 789         ifr.ifr_ifindex = index;
 790
 791         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
 792                 err = -errno;
 793                 close(sk);
 794                 goto out;
 795         }
 796
 797         DBG("ifname %s", ifr.ifr_name);
 798
 799         memset(&rt, 0, sizeof(rt));
 800         rt.rt_flags = RTF_UP;
 801
 802         memset(&addr, 0, sizeof(addr));
 803         addr.sin_family = AF_INET;
 804         addr.sin_addr.s_addr = INADDR_ANY;
 805
 806         memcpy(&rt.rt_genmask, &addr, sizeof(rt.rt_genmask));
 807         memcpy(&rt.rt_dst, &addr, sizeof(rt.rt_dst));
 808         memcpy(&rt.rt_gateway, &addr, sizeof(rt.rt_gateway));
 809
 810         rt.rt_dev = ifr.ifr_name;
 811
 812         if (ioctl(sk, SIOCADDRT, &rt) < 0 && errno != EEXIST)
 813                 err = -errno;
 814
 815         close(sk);
 816
 817 out:
 818         if (err < 0)
 819                 connman_error("Setting default interface route failed (%s)",
 820                                                         strerror(-err));
 821
 822         return err;
 823 }
 824
 825 int connman_inet_set_ipv6_gateway_interface(int index)
 826 {
 827         struct ifreq ifr;
 828         struct rtentry rt;
 829         struct sockaddr_in6 addr;
 830         const struct in6_addr any = IN6ADDR_ANY_INIT;
 831         int sk, err = 0;
 832
 833         DBG("index %d", index);
 834
 835         sk = socket(PF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, 0);
 836         if (sk < 0) {
 837                 err = -errno;
 838                 goto out;
 839         }
 840
 841         memset(&ifr, 0, sizeof(ifr));
 842         ifr.ifr_ifindex = index;
 843
 844         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
 845                 err = -errno;
 846                 close(sk);
 847                 goto out;
 848         }
 849
 850         DBG("ifname %s", ifr.ifr_name);
 851
 852         memset(&rt, 0, sizeof(rt));
 853         rt.rt_flags = RTF_UP;
 854
 855         memset(&addr, 0, sizeof(addr));
 856         addr.sin6_family = AF_INET6;
 857         addr.sin6_addr = any;
 858
 859         memcpy(&rt.rt_genmask, &addr, sizeof(rt.rt_genmask));
 860         memcpy(&rt.rt_dst, &addr, sizeof(rt.rt_dst));
 861         memcpy(&rt.rt_gateway, &addr, sizeof(rt.rt_gateway));
 862
 863         rt.rt_dev = ifr.ifr_name;
 864
 865         if (ioctl(sk, SIOCADDRT, &rt) < 0 && errno != EEXIST)
 866                 err = -errno;
 867
 868         close(sk);
 869
 870 out:
 871         if (err < 0)
 872                 connman_error("Setting default interface route failed (%s)",
 873                                                         strerror(-err));
 874
 875         return err;
 876 }
 877
 878 int connman_inet_clear_gateway_address(int index, const char *gateway)
 879 {
 880         struct ifreq ifr;
 881         struct rtentry rt;
 882         struct sockaddr_in addr;
 883         int sk, err = 0;
 884
 885         DBG("index %d gateway %s", index, gateway);
 886
 887         sk = socket(PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
 888         if (sk < 0) {
 889                 err = -errno;
 890                 goto out;
 891         }
 892
 893         memset(&ifr, 0, sizeof(ifr));
 894         ifr.ifr_ifindex = index;
 895
 896         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
 897                 err = -errno;
 898                 close(sk);
 899                 goto out;
 900         }
 901
 902         DBG("ifname %s", ifr.ifr_name);
 903
 904         memset(&rt, 0, sizeof(rt));
 905         rt.rt_flags = RTF_UP | RTF_GATEWAY;
 906
 907         memset(&addr, 0, sizeof(addr));
 908         addr.sin_family = AF_INET;
 909         addr.sin_addr.s_addr = INADDR_ANY;
 910         memcpy(&rt.rt_dst, &addr, sizeof(rt.rt_dst));
 911
 912         memset(&addr, 0, sizeof(addr));
 913         addr.sin_family = AF_INET;
 914         addr.sin_addr.s_addr = inet_addr(gateway);
 915         memcpy(&rt.rt_gateway, &addr, sizeof(rt.rt_gateway));
 916
 917         memset(&addr, 0, sizeof(addr));
 918         addr.sin_family = AF_INET;
 919         addr.sin_addr.s_addr = INADDR_ANY;
 920         memcpy(&rt.rt_genmask, &addr, sizeof(rt.rt_genmask));
 921
 922         if (ioctl(sk, SIOCDELRT, &rt) < 0 && errno != ESRCH)
 923                 err = -errno;
 924
 925         close(sk);
 926
 927 out:
 928         if (err < 0)
 929                 connman_error("Removing default gateway route failed (%s)",
 930                                                         strerror(-err));
 931
 932         return err;
 933 }
 934
 935 int connman_inet_clear_gateway_interface(int index)
 936 {
 937         struct ifreq ifr;
 938         struct rtentry rt;
 939         struct sockaddr_in addr;
 940         int sk, err = 0;
 941
 942         DBG("index %d", index);
 943
 944         sk = socket(PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
 945         if (sk < 0) {
 946                 err = -errno;
 947                 goto out;
 948         }
 949
 950         memset(&ifr, 0, sizeof(ifr));
 951         ifr.ifr_ifindex = index;
 952
 953         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
 954                 err = -errno;
 955                 close(sk);
 956                 goto out;
 957         }
 958
 959         DBG("ifname %s", ifr.ifr_name);
 960
 961         memset(&rt, 0, sizeof(rt));
 962         rt.rt_flags = RTF_UP;
 963
 964         memset(&addr, 0, sizeof(addr));
 965         addr.sin_family = AF_INET;
 966         addr.sin_addr.s_addr = INADDR_ANY;
 967
 968         memcpy(&rt.rt_genmask, &addr, sizeof(rt.rt_genmask));
 969         memcpy(&rt.rt_dst, &addr, sizeof(rt.rt_dst));
 970         memcpy(&rt.rt_gateway, &addr, sizeof(rt.rt_gateway));
 971
 972         rt.rt_dev = ifr.ifr_name;
 973
 974         if (ioctl(sk, SIOCDELRT, &rt) < 0 && errno != ESRCH)
 975                 err = -errno;
 976
 977         close(sk);
 978
 979 out:
 980         if (err < 0)
 981                 connman_error("Removing default interface route failed (%s)",
 982                                                         strerror(-err));
 983
 984         return err;
 985 }
 986
 987 int connman_inet_clear_ipv6_gateway_interface(int index)
 988 {
 989         struct ifreq ifr;
 990         struct rtentry rt;
 991         struct sockaddr_in6 addr;
 992         const struct in6_addr any = IN6ADDR_ANY_INIT;
 993         int sk, err = 0;
 994
 995         DBG("index %d", index);
 996
 997         sk = socket(PF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, 0);
 998         if (sk < 0) {
 999                 err = -errno;
1000                 goto out;
1001         }
1002
1003         memset(&ifr, 0, sizeof(ifr));
1004         ifr.ifr_ifindex = index;
1005
1006         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
1007                 err = -errno;
1008                 close(sk);
1009                 goto out;
1010         }
1011
1012         DBG("ifname %s", ifr.ifr_name);
1013
1014         memset(&rt, 0, sizeof(rt));
1015         rt.rt_flags = RTF_UP;
1016
1017         memset(&addr, 0, sizeof(addr));
1018         addr.sin6_family = AF_INET6;
1019         addr.sin6_addr = any;
1020
1021         memcpy(&rt.rt_genmask, &addr, sizeof(rt.rt_genmask));
1022         memcpy(&rt.rt_dst, &addr, sizeof(rt.rt_dst));
1023         memcpy(&rt.rt_gateway, &addr, sizeof(rt.rt_gateway));
1024
1025         rt.rt_dev = ifr.ifr_name;
1026
1027         if (ioctl(sk, SIOCDELRT, &rt) < 0 && errno != ESRCH)
1028                 err = -errno;
1029
1030         close(sk);
1031
1032 out:
1033         if (err < 0)
1034                 connman_error("Removing default interface route failed (%s)",
1035                                                         strerror(-err));
1036
1037         return err;
1038 }
1039
1040 bool connman_inet_compare_subnet(int index, const char *host)
1041 {
1042         struct ifreq ifr;
1043         struct in_addr _host_addr;
1044         in_addr_t host_addr, netmask_addr, if_addr;
1045         struct sockaddr_in *netmask, *addr;
1046         int sk;
1047
1048         DBG("host %s", host);
1049
1050         if (!host)
1051                 return false;
1052
1053         if (inet_aton(host, &_host_addr) == 0)
1054                 return -1;
1055         host_addr = _host_addr.s_addr;
1056
1057         sk = socket(PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
1058         if (sk < 0)
1059                 return false;
1060
1061         memset(&ifr, 0, sizeof(ifr));
1062         ifr.ifr_ifindex = index;
1063
1064         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
1065                 close(sk);
1066                 return false;
1067         }
1068
1069         if (ioctl(sk, SIOCGIFNETMASK, &ifr) < 0) {
1070                 close(sk);
1071                 return false;
1072         }
1073
1074         netmask = (struct sockaddr_in *)&ifr.ifr_netmask;
1075         netmask_addr = netmask->sin_addr.s_addr;
1076
1077         if (ioctl(sk, SIOCGIFADDR, &ifr) < 0) {
1078                 close(sk);
1079                 return false;
1080         }
1081
1082         close(sk);
1083
1084         addr = (struct sockaddr_in *)&ifr.ifr_addr;
1085         if_addr = addr->sin_addr.s_addr;
1086
1087         return ((if_addr & netmask_addr) == (host_addr & netmask_addr));
1088 }
1089
1090 int connman_inet_remove_from_bridge(int index, const char *bridge)
1091 {
1092         struct ifreq ifr;
1093         int sk, err = 0;
1094
1095         if (!bridge)
1096                 return -EINVAL;
1097
1098         sk = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0);
1099         if (sk < 0) {
1100                 err = -errno;
1101                 goto out;
1102         }
1103
1104         memset(&ifr, 0, sizeof(ifr));
1105         strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
1106         ifr.ifr_ifindex = index;
1107
1108         if (ioctl(sk, SIOCBRDELIF, &ifr) < 0)
1109                 err = -errno;
1110
1111         close(sk);
1112
1113 out:
1114         if (err < 0)
1115                 connman_error("Remove interface from bridge error %s",
1116                                                         strerror(-err));
1117
1118         return err;
1119 }
1120
1121 int connman_inet_add_to_bridge(int index, const char *bridge)
1122 {
1123         struct ifreq ifr;
1124         int sk, err = 0;
1125
1126         if (!bridge)
1127                 return -EINVAL;
1128
1129         sk = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0);
1130         if (sk < 0) {
1131                 err = -errno;
1132                 goto out;
1133         }
1134
1135         memset(&ifr, 0, sizeof(ifr));
1136         strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
1137         ifr.ifr_ifindex = index;
1138
1139         if (ioctl(sk, SIOCBRADDIF, &ifr) < 0)
1140                 err = -errno;
1141
1142         close(sk);
1143
1144 out:
1145         if (err < 0)
1146                 connman_error("Add interface to bridge error %s",
1147                                                         strerror(-err));
1148
1149         return err;
1150 }
1151
1152 int connman_inet_set_mtu(int index, int mtu)
1153 {
1154         struct ifreq ifr;
1155         int sk, err;
1156
1157         sk = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
1158         if (sk < 0)
1159                 return sk;
1160
1161         memset(&ifr, 0, sizeof(ifr));
1162         ifr.ifr_ifindex = index;
1163
1164         err = ioctl(sk, SIOCGIFNAME, &ifr);
1165         if (err == 0) {
1166                 ifr.ifr_mtu = mtu;
1167                 err = ioctl(sk, SIOCSIFMTU, &ifr);
1168         }
1169
1170         close(sk);
1171         return err;
1172 }
1173
1174 int connman_inet_setup_tunnel(char *tunnel, int mtu)
1175 {
1176         struct ifreq ifr;
1177         int sk, err, index;
1178         __u32 mask;
1179         __u32 flags;
1180
1181         if (!tunnel)
1182                 return -EINVAL;
1183
1184         sk = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
1185         if (sk < 0)
1186                 return sk;
1187
1188         index = if_nametoindex(tunnel);
1189
1190         err = connman_inet_set_mtu(index, mtu);
1191         if (err != 0)
1192                 goto done;
1193
1194         memset(&ifr, 0, sizeof(ifr));
1195         strncpy(ifr.ifr_name, tunnel, sizeof(ifr.ifr_name) - 1);
1196         err = ioctl(sk, SIOCGIFFLAGS, &ifr);
1197         if (err)
1198                 goto done;
1199
1200         mask = IFF_UP;
1201         flags = IFF_UP;
1202
1203         if ((ifr.ifr_flags ^ flags) & mask) {
1204                 ifr.ifr_flags &= ~mask;
1205                 ifr.ifr_flags |= mask & flags;
1206                 err = ioctl(sk, SIOCSIFFLAGS, &ifr);
1207                 if (err)
1208                         connman_error("SIOCSIFFLAGS failed: %s",
1209                                                         strerror(errno));
1210         }
1211
1212 done:
1213         close(sk);
1214         return err;
1215 }
1216
1217 int connman_inet_create_tunnel(char **iface)
1218 {
1219         struct ifreq ifr;
1220         int i, fd;
1221
1222         fd = open("/dev/net/tun", O_RDWR | O_CLOEXEC);
1223         if (fd < 0) {
1224                 i = -errno;
1225                 connman_error("Failed to open /dev/net/tun: %s",
1226                                 strerror(errno));
1227                 return i;
1228         }
1229
1230         memset(&ifr, 0, sizeof(ifr));
1231         ifr.ifr_flags = IFF_TUN | IFF_NO_PI;
1232
1233         for (i = 0; i < 256; i++) {
1234                 sprintf(ifr.ifr_name, "tun%d", i);
1235
1236                 if (!ioctl(fd, TUNSETIFF, (void *)&ifr))
1237                         break;
1238         }
1239
1240         if (i == 256) {
1241                 connman_error("Failed to find available tun device");
1242                 close(fd);
1243                 return -ENODEV;
1244         }
1245
1246         *iface = g_strdup(ifr.ifr_name);
1247
1248         return fd;
1249 }
1250
1251 /*
1252  * This callback struct is used when sending router and neighbor
1253  * solicitation and advertisement messages.
1254  */
1255 struct xs_cb_data {
1256         GIOChannel *channel;
1257         void *callback;
1258         struct sockaddr_in6 addr;
1259         guint timeout;
1260         guint watch_id;
1261         void *user_data;
1262 };
1263
1264 #define CMSG_BUF_LEN 512
1265 #define IN6ADDR_ALL_NODES_MC_INIT \
1266         { { { 0xff,0x02,0,0,0,0,0,0,0,0,0,0,0,0,0,0x1 } } } /* ff02::1 */
1267 #define IN6ADDR_ALL_ROUTERS_MC_INIT \
1268         { { { 0xff,0x02,0,0,0,0,0,0,0,0,0,0,0,0,0,0x2 } } } /* ff02::2 */
1269
1270 static const struct in6_addr in6addr_all_nodes_mc = IN6ADDR_ALL_NODES_MC_INIT;
1271 static const struct in6_addr in6addr_all_routers_mc =
1272                                                 IN6ADDR_ALL_ROUTERS_MC_INIT;
1273
1274 static void xs_cleanup(struct xs_cb_data *data)
1275 {
1276         if (data->channel) {
1277                 g_io_channel_shutdown(data->channel, TRUE, NULL);
1278                 g_io_channel_unref(data->channel);
1279                 data->channel = NULL;
1280         }
1281
1282         if (data->timeout > 0)
1283                 g_source_remove(data->timeout);
1284
1285         if (data->watch_id > 0)
1286                 g_source_remove(data->watch_id);
1287
1288         g_free(data);
1289 }
1290
1291 static gboolean rs_timeout_cb(gpointer user_data)
1292 {
1293         struct xs_cb_data *data = user_data;
1294
1295         DBG("user data %p", user_data);
1296
1297         if (!data)
1298                 return FALSE;
1299
1300         if (data->callback) {
1301                 __connman_inet_rs_cb_t cb = data->callback;
1302                 cb(NULL, 0, data->user_data);
1303         }
1304
1305         data->timeout = 0;
1306         xs_cleanup(data);
1307         return FALSE;
1308 }
1309
1310 static int icmpv6_recv(int fd, gpointer user_data)
1311 {
1312         struct msghdr mhdr;
1313         struct iovec iov;
1314         unsigned char chdr[CMSG_BUF_LEN];
1315         unsigned char buf[1540];
1316         struct xs_cb_data *data = user_data;
1317         struct nd_router_advert *hdr;
1318         struct sockaddr_in6 saddr;
1319         ssize_t len;
1320         __connman_inet_rs_cb_t cb = data->callback;
1321
1322         DBG("");
1323
1324         iov.iov_len = sizeof(buf);
1325         iov.iov_base = buf;
1326
1327         mhdr.msg_name = (void *)&saddr;
1328         mhdr.msg_namelen = sizeof(struct sockaddr_in6);
1329         mhdr.msg_flags = 0;
1330         mhdr.msg_iov = &iov;
1331         mhdr.msg_iovlen = 1;
1332         mhdr.msg_control = (void *)chdr;
1333         mhdr.msg_controllen = CMSG_BUF_LEN;
1334
1335         len = recvmsg(fd, &mhdr, 0);
1336         if (len < 0) {
1337                 cb(NULL, 0, data->user_data);
1338                 xs_cleanup(data);
1339                 return -errno;
1340         }
1341
1342 #if defined TIZEN_EXT
1343         /* Set Received Source Address from router as IPv6 Gateway Address */
1344         char src_addr[INET6_ADDRSTRLEN];
1345         if(inet_ntop(AF_INET6, &(saddr.sin6_addr), src_addr, INET6_ADDRSTRLEN)
1346                         == NULL) {
1347                 xs_cleanup(data);
1348                 return -errno;
1349         }
1350         DBG("Received Source Address %s from router", src_addr);
1351
1352         /* icmpv6_recv() function can be called in two scenarios :
1353          * 1. When __connman_inet_ipv6_send_rs() is called from check_dhcpv6()
1354          * 2. When __connman_inet_ipv6_send_rs() is called from
1355          * __connman_6to4_probe()
1356          * In the second case it is not  required to set DHCPv6 Gateway  Address
1357          * as DHCPv6 was not started and  network structure was not passed as
1358          * user_data. If it is tried  to add Source Address as  Gateway Address
1359          * then it will lead to  crash because of  user_data being ip_address
1360          * instead of network structure. So Adding Gateway Address in case 1st
1361          * case only.
1362          */
1363         char *address = data->user_data;
1364         int err = 0;
1365         unsigned char buffer[sizeof(struct in6_addr)] = {0, };
1366         /* Checking if user_data is an ip_address */
1367         err = inet_pton(AF_INET, address, buffer);
1368         /* Setting Received Source Address from
1369          * router as Gateway Address */
1370         if(err <= 0)
1371                 __connman_network_set_auto_ipv6_gateway(src_addr, data->user_data);
1372 #endif
1373         hdr = (struct nd_router_advert *)buf;
1374         DBG("code %d len %zd hdr %zd", hdr->nd_ra_code, len,
1375                                 sizeof(struct nd_router_advert));
1376         if (hdr->nd_ra_code != 0)
1377                 return 0;
1378
1379         cb(hdr, len, data->user_data);
1380         xs_cleanup(data);
1381
1382         return len;
1383 }
1384
1385 static gboolean icmpv6_event(GIOChannel *chan, GIOCondition cond, gpointer data)
1386 {
1387         int fd, ret;
1388
1389         DBG("");
1390
1391         if (cond & (G_IO_NVAL | G_IO_HUP | G_IO_ERR))
1392                 return FALSE;
1393
1394         fd = g_io_channel_unix_get_fd(chan);
1395         ret = icmpv6_recv(fd, data);
1396         if (ret == 0)
1397                 return TRUE;
1398
1399         return FALSE;
1400 }
1401
1402 /* Adapted from RFC 1071 "C" Implementation Example */
1403 static uint16_t csum(const void *phdr, const void *data, socklen_t datalen,
1404                 const void *extra_data, socklen_t extra_datalen)
1405 {
1406         register unsigned long sum = 0;
1407         socklen_t count;
1408         uint16_t *addr;
1409         int i;
1410
1411         /* caller must make sure datalen is even */
1412
1413         addr = (uint16_t *)phdr;
1414         for (i = 0; i < 20; i++)
1415                 sum += *addr++;
1416
1417         count = datalen;
1418         addr = (uint16_t *)data;
1419
1420         while (count > 1) {
1421                 sum += *(addr++);
1422                 count -= 2;
1423         }
1424
1425         if (extra_data) {
1426                 count = extra_datalen;
1427                 addr = (uint16_t *)extra_data;
1428
1429                 while (count > 1) {
1430                         sum += *(addr++);
1431                         count -= 2;
1432                 }
1433         }
1434
1435         while (sum >> 16)
1436                 sum = (sum & 0xffff) + (sum >> 16);
1437
1438         return (uint16_t)~sum;
1439 }
1440
1441 static int ndisc_send_unspec(int type, int oif, const struct in6_addr *dest,
1442                         const struct in6_addr *source,
1443                         unsigned char *buf, size_t len, uint16_t lifetime)
1444 {
1445         struct _phdr {
1446                 struct in6_addr src;
1447                 struct in6_addr dst;
1448                 uint32_t plen;
1449                 uint8_t reserved[3];
1450                 uint8_t nxt;
1451         } phdr;
1452
1453         struct {
1454                 struct ip6_hdr ip;
1455                 union {
1456                         struct icmp6_hdr icmp;
1457                         struct nd_neighbor_solicit ns;
1458                         struct nd_router_solicit rs;
1459                         struct nd_router_advert ra;
1460                 } i;
1461         } frame;
1462
1463         struct msghdr msgh;
1464         struct cmsghdr *cmsg;
1465         struct in6_pktinfo *pinfo;
1466         struct sockaddr_in6 dst, src;
1467         char cbuf[CMSG_SPACE(sizeof(*pinfo))];
1468         struct iovec iov[2];
1469         int fd, datalen, ret, iovlen = 1;
1470 #if defined TIZEN_EXT
1471         char ebuf[256];
1472 #endif
1473
1474         DBG("");
1475
1476         fd = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC, IPPROTO_RAW);
1477         if (fd < 0)
1478                 return -errno;
1479
1480         memset(&frame, 0, sizeof(frame));
1481         memset(&dst, 0, sizeof(dst));
1482
1483         if (type == ND_ROUTER_SOLICIT)
1484                 datalen = sizeof(frame.i.rs); /* 8, csum() safe */
1485         else if (type == ND_ROUTER_ADVERT) {
1486                 datalen = sizeof(frame.i.ra); /* 16, csum() safe */
1487                 frame.i.ra.nd_ra_router_lifetime = htons(lifetime);
1488         } else if (type == ND_NEIGHBOR_SOLICIT) {
1489                 datalen = sizeof(frame.i.ns); /* 24, csum() safe */
1490                 memcpy(&frame.i.ns.nd_ns_target, buf, sizeof(struct in6_addr));
1491         } else {
1492                 close(fd);
1493                 return -EINVAL;
1494         }
1495
1496         dst.sin6_addr = *dest;
1497
1498         if (source)
1499                 src.sin6_addr = *source;
1500         else
1501                 src.sin6_addr = in6addr_any;
1502
1503         /* Fill in the IPv6 header */
1504         frame.ip.ip6_vfc = 0x60;
1505         frame.ip.ip6_plen = htons(datalen + len);
1506         frame.ip.ip6_nxt = IPPROTO_ICMPV6;
1507         frame.ip.ip6_hlim = 255;
1508         frame.ip.ip6_dst = dst.sin6_addr;
1509         frame.ip.ip6_src = src.sin6_addr;
1510         /* all other fields are already set to zero */
1511
1512         /* Prepare pseudo header for csum */
1513         memset(&phdr, 0, sizeof(phdr));
1514         phdr.dst = dst.sin6_addr;
1515         phdr.src = src.sin6_addr;
1516         phdr.plen = htonl(datalen + len);
1517         phdr.nxt = IPPROTO_ICMPV6;
1518
1519         /* Fill in remaining ICMP header fields */
1520         frame.i.icmp.icmp6_type = type;
1521         frame.i.icmp.icmp6_cksum = csum(&phdr, &frame.i, datalen, buf, len);
1522
1523         iov[0].iov_base = &frame;
1524         iov[0].iov_len = sizeof(frame.ip) + datalen;
1525
1526         if (buf) {
1527                 iov[1].iov_base = buf;
1528                 iov[1].iov_len = len;
1529                 iovlen = 2;
1530         }
1531
1532         dst.sin6_family = AF_INET6;
1533         msgh.msg_name = &dst;
1534         msgh.msg_namelen = sizeof(dst);
1535         msgh.msg_iov = iov;
1536         msgh.msg_iovlen = iovlen;
1537         msgh.msg_flags = 0;
1538
1539         memset(cbuf, 0, CMSG_SPACE(sizeof(*pinfo)));
1540         cmsg = (struct cmsghdr *)cbuf;
1541         pinfo = (struct in6_pktinfo *)CMSG_DATA(cmsg);
1542         pinfo->ipi6_ifindex = oif;
1543
1544         cmsg->cmsg_len = CMSG_LEN(sizeof(*pinfo));
1545         cmsg->cmsg_level = IPPROTO_IPV6;
1546         cmsg->cmsg_type = IPV6_PKTINFO;
1547         msgh.msg_control = cmsg;
1548         msgh.msg_controllen = cmsg->cmsg_len;
1549
1550         ret = sendmsg(fd, &msgh, 0);
1551 #if defined TIZEN_EXT
1552         DBG("sendmsg errno: %d/%s", errno, strerror_r(errno, ebuf, sizeof(ebuf)));
1553 #endif
1554
1555         close(fd);
1556         return ret;
1557 }
1558
1559 static inline void ipv6_addr_set(struct in6_addr *addr,
1560                                 uint32_t w1, uint32_t w2,
1561                                 uint32_t w3, uint32_t w4)
1562 {
1563         addr->s6_addr32[0] = w1;
1564         addr->s6_addr32[1] = w2;
1565         addr->s6_addr32[2] = w3;
1566         addr->s6_addr32[3] = w4;
1567 }
1568
1569 static inline void ipv6_addr_solict_mult(const struct in6_addr *addr,
1570                                         struct in6_addr *solicited)
1571 {
1572         ipv6_addr_set(solicited, htonl(0xFF020000), 0, htonl(0x1),
1573                         htonl(0xFF000000) | addr->s6_addr32[3]);
1574 }
1575
1576 static int if_mc_group(int sock, int ifindex, const struct in6_addr *mc_addr,
1577                                                                 int cmd)
1578 {
1579         unsigned int val = 0;
1580         struct ipv6_mreq mreq;
1581         int ret;
1582
1583         memset(&mreq, 0, sizeof(mreq));
1584         mreq.ipv6mr_interface = ifindex;
1585         mreq.ipv6mr_multiaddr = *mc_addr;
1586
1587         ret = setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1588                         &val, sizeof(int));
1589         if (ret < 0) {
1590                 ret = -errno;
1591                 DBG("Cannot set IPV6_MULTICAST_LOOP %d/%s", ret,
1592                         strerror(-ret));
1593                 return ret;
1594         }
1595
1596         ret = setsockopt(sock, IPPROTO_IPV6, cmd, &mreq, sizeof(mreq));
1597         if (ret < 0) {
1598                 ret = -errno;
1599                 DBG("Cannot set option %d %d/%s", cmd, ret, strerror(-ret));
1600                 return ret;
1601         }
1602
1603         return 0;
1604 }
1605
1606 int __connman_inet_ipv6_send_rs(int index, int timeout,
1607                         __connman_inet_rs_cb_t callback, void *user_data)
1608 {
1609         struct xs_cb_data *data;
1610         struct icmp6_filter filter;
1611         struct in6_addr solicit;
1612         struct in6_addr dst = in6addr_all_routers_mc;
1613         int sk;
1614
1615         if (timeout <= 0)
1616                 return -EINVAL;
1617
1618         data = g_try_malloc0(sizeof(struct xs_cb_data));
1619         if (!data)
1620                 return -ENOMEM;
1621
1622         data->callback = callback;
1623         data->user_data = user_data;
1624         data->timeout = g_timeout_add_seconds(timeout, rs_timeout_cb, data);
1625
1626         sk = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC, IPPROTO_ICMPV6);
1627         if (sk < 0)
1628                 return -errno;
1629
1630         DBG("sock %d", sk);
1631
1632         ICMP6_FILTER_SETBLOCKALL(&filter);
1633         ICMP6_FILTER_SETPASS(ND_ROUTER_ADVERT, &filter);
1634
1635         setsockopt(sk, IPPROTO_ICMPV6, ICMP6_FILTER, &filter,
1636                                                 sizeof(struct icmp6_filter));
1637
1638         ipv6_addr_solict_mult(&dst, &solicit);
1639         if_mc_group(sk, index, &in6addr_all_nodes_mc, IPV6_JOIN_GROUP);
1640         if_mc_group(sk, index, &solicit, IPV6_JOIN_GROUP);
1641
1642         data->channel = g_io_channel_unix_new(sk);
1643         g_io_channel_set_close_on_unref(data->channel, TRUE);
1644
1645         g_io_channel_set_encoding(data->channel, NULL, NULL);
1646         g_io_channel_set_buffered(data->channel, FALSE);
1647
1648         data->watch_id = g_io_add_watch(data->channel,
1649                         G_IO_IN | G_IO_NVAL | G_IO_HUP | G_IO_ERR,
1650                         icmpv6_event, data);
1651
1652         ndisc_send_unspec(ND_ROUTER_SOLICIT, index, &dst, NULL, NULL, 0, 0);
1653
1654         return 0;
1655 }
1656
1657 static inline void ipv6_addr_advert_mult(const struct in6_addr *addr,
1658                                         struct in6_addr *advert)
1659 {
1660         ipv6_addr_set(advert, htonl(0xFF020000), 0, htonl(0x2),
1661                         htonl(0xFF000000) | addr->s6_addr32[3]);
1662 }
1663
1664 #define MSG_SIZE_SEND 1452
1665
1666 static int inc_len(int len, int inc)
1667 {
1668         if (len > MSG_SIZE_SEND)
1669                 return -EINVAL;
1670
1671         len += inc;
1672         return len;
1673 }
1674
1675 int __connman_inet_ipv6_send_ra(int index, struct in6_addr *src_addr,
1676                                 GSList *prefixes, int router_lifetime)
1677 {
1678         GSList *list;
1679         struct in6_addr src, *source;
1680         struct in6_addr dst = in6addr_all_nodes_mc;
1681         GDHCPIAPrefix *prefix;
1682         unsigned char buf[MSG_SIZE_SEND];
1683         char addr_str[INET6_ADDRSTRLEN];
1684         int sk, err = 0;
1685         int len, count = 0;
1686
1687         if (!prefixes)
1688                 return -EINVAL;
1689
1690         sk = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC, IPPROTO_ICMPV6);
1691         if (sk < 0)
1692                 return -errno;
1693
1694         if (!src_addr) {
1695                 __connman_inet_get_interface_ll_address(index, AF_INET6, &src);
1696                 source = &src;
1697         } else
1698                 source = src_addr;
1699
1700         DBG("sock %d index %d prefixes %p src %s lifetime %d", sk, index,
1701                 prefixes, inet_ntop(AF_INET6, source, addr_str,
1702                                 INET6_ADDRSTRLEN),
1703                 router_lifetime);
1704
1705         memset(buf, 0, MSG_SIZE_SEND);
1706         len = 0;
1707
1708         for (list = prefixes; list; list = list->next) {
1709                 struct nd_opt_prefix_info *pinfo;
1710
1711                 prefix = list->data;
1712                 pinfo = (struct nd_opt_prefix_info *)(buf + len);
1713
1714                 len = inc_len(len, sizeof(*pinfo));
1715                 if (len < 0) {
1716                         err = len;
1717                         goto out;
1718                 }
1719
1720                 pinfo->nd_opt_pi_type = ND_OPT_PREFIX_INFORMATION;
1721                 pinfo->nd_opt_pi_len = 4;
1722                 pinfo->nd_opt_pi_prefix_len = prefix->prefixlen;
1723                 pinfo->nd_opt_pi_flags_reserved = ND_OPT_PI_FLAG_ONLINK;
1724                 pinfo->nd_opt_pi_flags_reserved |= ND_OPT_PI_FLAG_AUTO;
1725                 if (router_lifetime > 0) {
1726                         pinfo->nd_opt_pi_valid_time = htonl(prefix->valid);
1727                         pinfo->nd_opt_pi_preferred_time =
1728                                                 htonl(prefix->preferred);
1729                 }
1730                 pinfo->nd_opt_pi_reserved2 = 0;
1731
1732                 memcpy(&pinfo->nd_opt_pi_prefix, &prefix->prefix,
1733                                                 sizeof(struct in6_addr));
1734
1735                 DBG("[%d] index %d prefix %s/%d", count, index,
1736                         inet_ntop(AF_INET6, &prefix->prefix, addr_str,
1737                                 INET6_ADDRSTRLEN), prefix->prefixlen);
1738
1739                 count++;
1740         }
1741
1742         if (count > 0) {
1743                 err = ndisc_send_unspec(ND_ROUTER_ADVERT, index, &dst, source,
1744                                         buf, len, router_lifetime);
1745                 if (err < 0)
1746                         DBG("cannot send RA %d/%s", err, strerror(-err));
1747         }
1748
1749 out:
1750         close(sk);
1751         return err;
1752 }
1753
1754 void __connman_inet_ipv6_stop_recv_rs(void *context)
1755 {
1756         if (!context)
1757                 return;
1758
1759         xs_cleanup(context);
1760 }
1761
1762 static int icmpv6_rs_recv(int fd, gpointer user_data)
1763 {
1764         struct msghdr mhdr;
1765         struct iovec iov;
1766         unsigned char chdr[CMSG_BUF_LEN];
1767         unsigned char buf[1540];
1768         struct xs_cb_data *data = user_data;
1769         struct nd_router_solicit *hdr;
1770         struct sockaddr_in6 saddr;
1771         ssize_t len;
1772         __connman_inet_recv_rs_cb_t cb = data->callback;
1773
1774         DBG("");
1775
1776         iov.iov_len = sizeof(buf);
1777         iov.iov_base = buf;
1778
1779         mhdr.msg_name = (void *)&saddr;
1780         mhdr.msg_namelen = sizeof(struct sockaddr_in6);
1781         mhdr.msg_flags = 0;
1782         mhdr.msg_iov = &iov;
1783         mhdr.msg_iovlen = 1;
1784         mhdr.msg_control = (void *)chdr;
1785         mhdr.msg_controllen = CMSG_BUF_LEN;
1786
1787         len = recvmsg(fd, &mhdr, 0);
1788         if (len < 0) {
1789                 cb(NULL, 0, data->user_data);
1790                 return -errno;
1791         }
1792
1793         hdr = (struct nd_router_solicit *)buf;
1794         DBG("code %d len %zd hdr %zd", hdr->nd_rs_code, len,
1795                                 sizeof(struct nd_router_solicit));
1796         if (hdr->nd_rs_code != 0)
1797                 return 0;
1798
1799         cb(hdr, len, data->user_data);
1800         return len;
1801 }
1802
1803 static gboolean icmpv6_rs_event(GIOChannel *chan, GIOCondition cond,
1804                                                                 gpointer data)
1805 {
1806         int fd, ret;
1807
1808         DBG("");
1809
1810         if (cond & (G_IO_NVAL | G_IO_HUP | G_IO_ERR))
1811                 return FALSE;
1812
1813         fd = g_io_channel_unix_get_fd(chan);
1814         ret = icmpv6_rs_recv(fd, data);
1815         if (ret == 0)
1816                 return TRUE;
1817
1818         return FALSE;
1819 }
1820
1821 int __connman_inet_ipv6_start_recv_rs(int index,
1822                                         __connman_inet_recv_rs_cb_t callback,
1823                                         void *user_data,
1824                                         void **context)
1825 {
1826         struct xs_cb_data *data;
1827         struct icmp6_filter filter;
1828         char addr_str[INET6_ADDRSTRLEN];
1829         int sk, err;
1830
1831         data = g_try_malloc0(sizeof(struct xs_cb_data));
1832         if (!data)
1833                 return -ENOMEM;
1834
1835         data->callback = callback;
1836         data->user_data = user_data;
1837
1838         sk = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC, IPPROTO_ICMPV6);
1839         if (sk < 0) {
1840                 g_free(data);
1841                 return -errno;
1842         }
1843
1844         DBG("sock %d", sk);
1845
1846         ICMP6_FILTER_SETBLOCKALL(&filter);
1847         ICMP6_FILTER_SETPASS(ND_ROUTER_SOLICIT, &filter);
1848
1849         setsockopt(sk, IPPROTO_ICMPV6, ICMP6_FILTER, &filter,
1850                                                 sizeof(struct icmp6_filter));
1851
1852         err = if_mc_group(sk, index, &in6addr_all_routers_mc, IPV6_JOIN_GROUP);
1853         if (err < 0)
1854                 DBG("Cannot join mc %s %d/%s", inet_ntop(AF_INET6,
1855                         &in6addr_all_routers_mc, addr_str, INET6_ADDRSTRLEN),
1856                         err, strerror(-err));
1857
1858         data->channel = g_io_channel_unix_new(sk);
1859         g_io_channel_set_close_on_unref(data->channel, TRUE);
1860
1861         g_io_channel_set_encoding(data->channel, NULL, NULL);
1862         g_io_channel_set_buffered(data->channel, FALSE);
1863
1864         data->watch_id = g_io_add_watch(data->channel,
1865                         G_IO_IN | G_IO_NVAL | G_IO_HUP | G_IO_ERR,
1866                         icmpv6_rs_event, data);
1867
1868         *context = data;
1869
1870         return 0;
1871 }
1872
1873 static gboolean ns_timeout_cb(gpointer user_data)
1874 {
1875         struct xs_cb_data *data = user_data;
1876
1877         DBG("user data %p", user_data);
1878
1879         if (!data)
1880                 return FALSE;
1881
1882         if (data->callback) {
1883                 __connman_inet_ns_cb_t cb = data->callback;
1884                 cb(NULL, 0, &data->addr.sin6_addr, data->user_data);
1885         }
1886
1887         data->timeout = 0;
1888         xs_cleanup(data);
1889         return FALSE;
1890 }
1891
1892 static int icmpv6_nd_recv(int fd, gpointer user_data)
1893 {
1894         struct msghdr mhdr;
1895         struct iovec iov;
1896         unsigned char chdr[CMSG_BUF_LEN];
1897         unsigned char buf[1540];
1898         struct xs_cb_data *data = user_data;
1899         struct nd_neighbor_advert *hdr;
1900         struct sockaddr_in6 saddr;
1901         ssize_t len;
1902         __connman_inet_ns_cb_t cb = data->callback;
1903
1904         DBG("");
1905
1906         iov.iov_len = sizeof(buf);
1907         iov.iov_base = buf;
1908
1909         mhdr.msg_name = (void *)&saddr;
1910         mhdr.msg_namelen = sizeof(struct sockaddr_in6);
1911         mhdr.msg_flags = 0;
1912         mhdr.msg_iov = &iov;
1913         mhdr.msg_iovlen = 1;
1914         mhdr.msg_control = (void *)chdr;
1915         mhdr.msg_controllen = CMSG_BUF_LEN;
1916
1917         len = recvmsg(fd, &mhdr, 0);
1918         if (len < 0) {
1919                 cb(NULL, 0, &data->addr.sin6_addr, data->user_data);
1920                 xs_cleanup(data);
1921                 return -errno;
1922         }
1923
1924         hdr = (struct nd_neighbor_advert *)buf;
1925         DBG("code %d len %zd hdr %zd", hdr->nd_na_code, len,
1926                                 sizeof(struct nd_neighbor_advert));
1927         if (hdr->nd_na_code != 0)
1928                 return 0;
1929
1930         /*
1931          * We can receive any neighbor advertisement so we need to check if the
1932          * packet was meant for us and ignore the packet otherwise.
1933          */
1934         if (memcmp(&data->addr.sin6_addr, &hdr->nd_na_target,
1935                         sizeof(struct in6_addr)))
1936                 return 0;
1937
1938         cb(hdr, len, &data->addr.sin6_addr, data->user_data);
1939         xs_cleanup(data);
1940
1941         return len;
1942 }
1943
1944 static gboolean icmpv6_nd_event(GIOChannel *chan, GIOCondition cond,
1945                                                                 gpointer data)
1946 {
1947         int fd, ret;
1948
1949         DBG("");
1950
1951         if (cond & (G_IO_NVAL | G_IO_HUP | G_IO_ERR))
1952                 return FALSE;
1953
1954         fd = g_io_channel_unix_get_fd(chan);
1955         ret = icmpv6_nd_recv(fd, data);
1956         if (ret == 0)
1957                 return TRUE;
1958
1959         return FALSE;
1960 }
1961
1962 int __connman_inet_ipv6_do_dad(int index, int timeout_ms,
1963                                 struct in6_addr *addr,
1964                                 __connman_inet_ns_cb_t callback,
1965                                 void *user_data)
1966 {
1967         struct xs_cb_data *data;
1968         struct icmp6_filter filter;
1969         struct in6_addr solicit;
1970         int sk, err, val = 1;
1971
1972         if (timeout_ms <= 0)
1973                 return -EINVAL;
1974
1975         data = g_try_malloc0(sizeof(struct xs_cb_data));
1976         if (!data)
1977                 return -ENOMEM;
1978
1979         data->callback = callback;
1980         data->user_data = user_data;
1981         data->timeout = g_timeout_add_full(G_PRIORITY_DEFAULT,
1982                                         (guint)timeout_ms,
1983                                         ns_timeout_cb,
1984                                         data,
1985                                         NULL);
1986         memcpy(&data->addr.sin6_addr, addr, sizeof(struct in6_addr));
1987
1988         sk = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC, IPPROTO_ICMPV6);
1989         if (sk < 0)
1990                 return -errno;
1991
1992         DBG("sock %d", sk);
1993
1994         ICMP6_FILTER_SETBLOCKALL(&filter);
1995         ICMP6_FILTER_SETPASS(ND_NEIGHBOR_ADVERT, &filter);
1996
1997         setsockopt(sk, IPPROTO_ICMPV6, ICMP6_FILTER, &filter,
1998                                                 sizeof(struct icmp6_filter));
1999
2000         if (setsockopt(sk, IPPROTO_IPV6, IPV6_RECVPKTINFO,
2001                                                 &val, sizeof(val)) < 0) {
2002                 err = -errno;
2003                 DBG("Cannot set IPV6_RECVPKTINFO %d/%s", err,
2004                                                         strerror(-err));
2005                 close(sk);
2006                 return err;
2007         }
2008
2009         if (setsockopt(sk, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
2010                                                 &val, sizeof(val)) < 0) {
2011                 err = -errno;
2012                 DBG("Cannot set IPV6_RECVHOPLIMIT %d/%s", err,
2013                                                         strerror(-err));
2014                 close(sk);
2015                 return err;
2016         }
2017
2018         val = 0;
2019         setsockopt(sk, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &val, sizeof(val));
2020
2021         ipv6_addr_solict_mult(addr, &solicit);
2022         if_mc_group(sk, index, &in6addr_all_nodes_mc, IPV6_JOIN_GROUP);
2023         if_mc_group(sk, index, &solicit, IPV6_JOIN_GROUP);
2024
2025         data->channel = g_io_channel_unix_new(sk);
2026         g_io_channel_set_close_on_unref(data->channel, TRUE);
2027
2028         g_io_channel_set_encoding(data->channel, NULL, NULL);
2029         g_io_channel_set_buffered(data->channel, FALSE);
2030
2031         data->watch_id = g_io_add_watch(data->channel,
2032                         G_IO_IN | G_IO_NVAL | G_IO_HUP | G_IO_ERR,
2033                         icmpv6_nd_event, data);
2034
2035         err = ndisc_send_unspec(ND_NEIGHBOR_SOLICIT, index, &solicit, NULL,
2036                         (unsigned char *)addr, 0, 0);
2037         if (err < 0) {
2038                 DBG("Cannot send NS %d/%s", err, strerror(-err));
2039                 xs_cleanup(data);
2040         }
2041
2042         return err;
2043 }
2044
2045 GSList *__connman_inet_ipv6_get_prefixes(struct nd_router_advert *hdr,
2046                                         unsigned int length)
2047 {
2048         GSList *prefixes = NULL;
2049         uint8_t *pos;
2050         int len;
2051
2052         if (length <= sizeof(struct nd_router_advert))
2053                 return NULL;
2054
2055         len = length - sizeof(struct nd_router_advert);
2056         pos = (uint8_t *)hdr + sizeof(struct nd_router_advert);
2057
2058         while (len > 0) {
2059                 struct nd_opt_prefix_info *pinfo;
2060                 char prefix_str[INET6_ADDRSTRLEN+1], *str;
2061                 const char *prefix;
2062                 int optlen;
2063
2064                 if (len < 2)
2065                         break;
2066
2067                 optlen = pos[1] << 3;
2068                 if (optlen == 0 || optlen > len)
2069                         break;
2070
2071                 switch (pos[0]) {
2072                 case ND_OPT_PREFIX_INFORMATION:
2073                         pinfo = (struct nd_opt_prefix_info *)pos;
2074                         prefix = inet_ntop(AF_INET6, &pinfo->nd_opt_pi_prefix,
2075                                         prefix_str, INET6_ADDRSTRLEN);
2076                         if (!prefix)
2077                                 break;
2078
2079                         str = g_strdup_printf("%s/%d", prefix,
2080                                                 pinfo->nd_opt_pi_prefix_len);
2081                         prefixes = g_slist_prepend(prefixes, str);
2082
2083                         DBG("prefix %s", str);
2084
2085                         break;
2086                 }
2087
2088                 len -= optlen;
2089                 pos += optlen;
2090         }
2091
2092         return prefixes;
2093 }
2094
2095 static int get_dest_addr(int family, int index, char *buf, int len)
2096 {
2097         struct ifreq ifr;
2098         void *addr;
2099         int sk;
2100
2101         sk = socket(family, SOCK_DGRAM | SOCK_CLOEXEC, 0);
2102         if (sk < 0)
2103                 return -errno;
2104
2105         memset(&ifr, 0, sizeof(ifr));
2106         ifr.ifr_ifindex = index;
2107
2108         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
2109                 DBG("SIOCGIFNAME (%d/%s)", errno, strerror(errno));
2110                 close(sk);
2111                 return -errno;
2112         }
2113
2114         if (ioctl(sk, SIOCGIFFLAGS, &ifr) < 0) {
2115                 DBG("SIOCGIFFLAGS (%d/%s)", errno, strerror(errno));
2116                 close(sk);
2117                 return -errno;
2118         }
2119
2120         if ((ifr.ifr_flags & IFF_POINTOPOINT) == 0) {
2121                 close(sk);
2122                 errno = EINVAL;
2123                 return -errno;
2124         }
2125
2126         DBG("index %d %s", index, ifr.ifr_name);
2127
2128         if (ioctl(sk, SIOCGIFDSTADDR, &ifr) < 0) {
2129                 connman_error("Get destination address failed (%s)",
2130                                                         strerror(errno));
2131                 close(sk);
2132                 return -errno;
2133         }
2134
2135         close(sk);
2136
2137         switch (family) {
2138         case AF_INET:
2139                 addr = &((struct sockaddr_in *)&ifr.ifr_dstaddr)->sin_addr;
2140                 break;
2141         case AF_INET6:
2142                 addr = &((struct sockaddr_in6 *)&ifr.ifr_dstaddr)->sin6_addr;
2143                 break;
2144         default:
2145                 errno = EINVAL;
2146                 return -errno;
2147         }
2148
2149         if (!inet_ntop(family, addr, buf, len)) {
2150                 DBG("error %d/%s", errno, strerror(errno));
2151                 return -errno;
2152         }
2153
2154         return 0;
2155 }
2156
2157 int connman_inet_get_dest_addr(int index, char **dest)
2158 {
2159         char addr[INET_ADDRSTRLEN];
2160         int ret;
2161
2162         ret = get_dest_addr(PF_INET, index, addr, INET_ADDRSTRLEN);
2163         if (ret < 0)
2164                 return ret;
2165
2166         *dest = g_strdup(addr);
2167
2168         DBG("destination %s", *dest);
2169
2170         return 0;
2171 }
2172
2173 int connman_inet_ipv6_get_dest_addr(int index, char **dest)
2174 {
2175         char addr[INET6_ADDRSTRLEN];
2176         int ret;
2177
2178         ret = get_dest_addr(PF_INET6, index, addr, INET6_ADDRSTRLEN);
2179         if (ret < 0)
2180                 return ret;
2181
2182         *dest = g_strdup(addr);
2183
2184         DBG("destination %s", *dest);
2185
2186         return 0;
2187 }
2188
2189 int __connman_inet_rtnl_open(struct __connman_inet_rtnl_handle *rth)
2190 {
2191         int sndbuf = 1024;
2192         int rcvbuf = 1024 * 4;
2193
2194         rth->fd = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE);
2195         if (rth->fd < 0) {
2196                 connman_error("Can not open netlink socket: %s",
2197                                                 strerror(errno));
2198                 return -errno;
2199         }
2200
2201         if (setsockopt(rth->fd, SOL_SOCKET, SO_SNDBUF, &sndbuf,
2202                         sizeof(sndbuf)) < 0) {
2203                 connman_error("SO_SNDBUF: %s", strerror(errno));
2204                 return -errno;
2205         }
2206
2207         if (setsockopt(rth->fd, SOL_SOCKET, SO_RCVBUF, &rcvbuf,
2208                         sizeof(rcvbuf)) < 0) {
2209                 connman_error("SO_RCVBUF: %s", strerror(errno));
2210                 return -errno;
2211         }
2212
2213         memset(&rth->local, 0, sizeof(rth->local));
2214         rth->local.nl_family = AF_NETLINK;
2215         rth->local.nl_groups = 0;
2216
2217         if (bind(rth->fd, (struct sockaddr *)&rth->local,
2218                                                 sizeof(rth->local)) < 0) {
2219                 connman_error("Can not bind netlink socket: %s",
2220                                                         strerror(errno));
2221                 return -errno;
2222         }
2223
2224         rth->seq = time(NULL);
2225
2226         DBG("fd %d", rth->fd);
2227
2228         return 0;
2229 }
2230
2231 struct inet_rtnl_cb_data {
2232         GIOChannel *channel;
2233         __connman_inet_rtnl_cb_t callback;
2234         guint rtnl_timeout;
2235         guint watch_id;
2236         struct __connman_inet_rtnl_handle *rtnl;
2237         void *user_data;
2238 };
2239
2240 static void inet_rtnl_cleanup(struct inet_rtnl_cb_data *data)
2241 {
2242         struct __connman_inet_rtnl_handle *rth = data->rtnl;
2243
2244         if (data->channel) {
2245                 g_io_channel_shutdown(data->channel, TRUE, NULL);
2246                 g_io_channel_unref(data->channel);
2247                 data->channel = NULL;
2248         }
2249
2250         DBG("data %p", data);
2251
2252         if (data->rtnl_timeout > 0)
2253                 g_source_remove(data->rtnl_timeout);
2254
2255         if (data->watch_id > 0)
2256                 g_source_remove(data->watch_id);
2257
2258         if (rth) {
2259                 __connman_inet_rtnl_close(rth);
2260                 g_free(rth);
2261         }
2262
2263         g_free(data);
2264 }
2265
2266 static gboolean inet_rtnl_timeout_cb(gpointer user_data)
2267 {
2268         struct inet_rtnl_cb_data *data = user_data;
2269
2270         DBG("user data %p", user_data);
2271
2272         if (!data)
2273                 return FALSE;
2274
2275         if (data->callback)
2276                 data->callback(NULL, data->user_data);
2277
2278         data->rtnl_timeout = 0;
2279         inet_rtnl_cleanup(data);
2280         return FALSE;
2281 }
2282
2283 static int inet_rtnl_recv(GIOChannel *chan, gpointer user_data)
2284 {
2285         struct inet_rtnl_cb_data *rtnl_data = user_data;
2286         struct __connman_inet_rtnl_handle *rth = rtnl_data->rtnl;
2287         struct nlmsghdr *h = NULL;
2288         struct sockaddr_nl nladdr;
2289         socklen_t addr_len = sizeof(nladdr);
2290         unsigned char buf[4096];
2291         void *ptr = buf;
2292         gsize len;
2293         int status, fd;
2294
2295         memset(buf, 0, sizeof(buf));
2296         memset(&nladdr, 0, sizeof(nladdr));
2297
2298         fd = g_io_channel_unix_get_fd(chan);
2299
2300         status = recvfrom(fd, buf, sizeof(buf), 0,
2301                        (struct sockaddr *) &nladdr, &addr_len);
2302         if (status < 0) {
2303                 if (errno == EINTR || errno == EAGAIN)
2304                         return 0;
2305
2306                 return -1;
2307         }
2308
2309         if (status == 0)
2310                 return -1;
2311
2312         if (nladdr.nl_pid != 0) { /* not sent by kernel, ignore */
2313                 DBG("Received msg from %u, ignoring it", nladdr.nl_pid);
2314                 return 0;
2315         }
2316
2317         len = status;
2318
2319         while (len > 0) {
2320                 struct nlmsgerr *err;
2321
2322                 h = ptr;
2323
2324                 if (!NLMSG_OK(h, len))
2325                         return -1;
2326
2327                 if (h->nlmsg_seq != rth->seq) {
2328                         /* Skip this msg */
2329                         DBG("skip %d/%d len %d", rth->seq,
2330                                 h->nlmsg_seq, h->nlmsg_len);
2331
2332                         len -= h->nlmsg_len;
2333                         ptr += h->nlmsg_len;
2334                         continue;
2335                 }
2336
2337                 switch (h->nlmsg_type) {
2338                 case NLMSG_NOOP:
2339                 case NLMSG_OVERRUN:
2340                         return -1;
2341
2342                 case NLMSG_ERROR:
2343                         err = (struct nlmsgerr *)NLMSG_DATA(h);
2344                         connman_error("RTNETLINK answers %s (%d)",
2345                                 strerror(-err->error), -err->error);
2346                         return err->error;
2347                 }
2348
2349                 break;
2350         }
2351
2352         if (h->nlmsg_seq == rth->seq) {
2353                 DBG("received %d seq %d", h->nlmsg_len, h->nlmsg_seq);
2354
2355                 rtnl_data->callback(h, rtnl_data->user_data);
2356
2357                 inet_rtnl_cleanup(rtnl_data);
2358         }
2359
2360         return 0;
2361 }
2362
2363 static gboolean inet_rtnl_event(GIOChannel *chan, GIOCondition cond,
2364                                                         gpointer user_data)
2365 {
2366         int ret;
2367
2368         DBG("");
2369
2370         if (cond & (G_IO_NVAL | G_IO_HUP | G_IO_ERR))
2371                 return FALSE;
2372
2373         ret = inet_rtnl_recv(chan, user_data);
2374         if (ret != 0)
2375                 return TRUE;
2376
2377         return FALSE;
2378 }
2379
2380 int __connman_inet_rtnl_talk(struct __connman_inet_rtnl_handle *rtnl,
2381                         struct nlmsghdr *n, int timeout,
2382                         __connman_inet_rtnl_cb_t callback, void *user_data)
2383 {
2384         struct sockaddr_nl nladdr;
2385         struct inet_rtnl_cb_data *data;
2386         unsigned seq;
2387         int err;
2388
2389         memset(&nladdr, 0, sizeof(nladdr));
2390         nladdr.nl_family = AF_NETLINK;
2391
2392         n->nlmsg_seq = seq = ++rtnl->seq;
2393
2394         if (callback) {
2395                 data = g_try_malloc0(sizeof(struct inet_rtnl_cb_data));
2396                 if (!data)
2397                         return -ENOMEM;
2398
2399                 data->callback = callback;
2400                 data->user_data = user_data;
2401                 data->rtnl = rtnl;
2402                 data->rtnl_timeout = g_timeout_add_seconds(timeout,
2403                                                 inet_rtnl_timeout_cb, data);
2404
2405                 data->channel = g_io_channel_unix_new(rtnl->fd);
2406                 g_io_channel_set_close_on_unref(data->channel, TRUE);
2407
2408                 g_io_channel_set_encoding(data->channel, NULL, NULL);
2409                 g_io_channel_set_buffered(data->channel, FALSE);
2410
2411                 data->watch_id = g_io_add_watch(data->channel,
2412                                 G_IO_IN | G_IO_NVAL | G_IO_HUP | G_IO_ERR,
2413                                                 inet_rtnl_event, data);
2414         } else
2415                 n->nlmsg_flags |= NLM_F_ACK;
2416
2417         err = sendto(rtnl->fd, &rtnl->req.n, rtnl->req.n.nlmsg_len, 0,
2418                 (struct sockaddr *) &nladdr, sizeof(nladdr));
2419         DBG("handle %p len %d", rtnl, rtnl->req.n.nlmsg_len);
2420         if (err < 0) {
2421                 connman_error("Can not talk to rtnetlink err %d %s",
2422                         -errno, strerror(errno));
2423                 return -errno;
2424         }
2425
2426         if ((unsigned int)err != rtnl->req.n.nlmsg_len) {
2427                 connman_error("Sent %d bytes, msg truncated", err);
2428                 return -EINVAL;
2429         }
2430
2431         return 0;
2432 }
2433
2434 void __connman_inet_rtnl_close(struct __connman_inet_rtnl_handle *rth)
2435 {
2436         DBG("handle %p", rth);
2437
2438         if (rth->fd >= 0) {
2439                 close(rth->fd);
2440                 rth->fd = -1;
2441         }
2442 }
2443
2444 int __connman_inet_rtnl_addattr32(struct nlmsghdr *n, size_t maxlen, int type,
2445                                 __u32 data)
2446 {
2447         int len = RTA_LENGTH(4);
2448         struct rtattr *rta;
2449
2450         if (NLMSG_ALIGN(n->nlmsg_len) + len > maxlen) {
2451                 DBG("Error! max allowed bound %zd exceeded", maxlen);
2452                 return -1;
2453         }
2454         rta = NLMSG_TAIL(n);
2455         rta->rta_type = type;
2456         rta->rta_len = len;
2457         memcpy(RTA_DATA(rta), &data, 4);
2458         n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + len;
2459
2460         return 0;
2461 }
2462
2463 static int parse_rtattr(struct rtattr *tb[], int max,
2464                         struct rtattr *rta, int len)
2465 {
2466         memset(tb, 0, sizeof(struct rtattr *) * (max + 1));
2467         while (RTA_OK(rta, len)) {
2468                 if ((rta->rta_type <= max) && (!tb[rta->rta_type]))
2469                         tb[rta->rta_type] = rta;
2470                 rta = RTA_NEXT(rta, len);
2471         }
2472         if (len)
2473                 connman_error("Deficit %d, rta_len=%d", len, rta->rta_len);
2474
2475         return 0;
2476 }
2477
2478 struct get_route_cb_data {
2479         connman_inet_addr_cb_t callback;
2480         void *user_data;
2481 };
2482
2483 static void get_route_cb(struct nlmsghdr *answer, void *user_data)
2484 {
2485         struct get_route_cb_data *data = user_data;
2486         struct rtattr *tb[RTA_MAX+1];
2487         struct rtmsg *r = NLMSG_DATA(answer);
2488         int len, index = -1;
2489         char abuf[256];
2490         const char *addr = NULL;
2491
2492         DBG("answer %p data %p", answer, user_data);
2493
2494         if (!answer)
2495                 goto out;
2496
2497         len = answer->nlmsg_len;
2498
2499         if (answer->nlmsg_type != RTM_NEWROUTE &&
2500                                 answer->nlmsg_type != RTM_DELROUTE) {
2501                 connman_error("Not a route: %08x %08x %08x",
2502                         answer->nlmsg_len, answer->nlmsg_type,
2503                         answer->nlmsg_flags);
2504                 goto out;
2505         }
2506
2507         len -= NLMSG_LENGTH(sizeof(*r));
2508         if (len < 0) {
2509                 connman_error("BUG: wrong nlmsg len %d", len);
2510                 goto out;
2511         }
2512
2513         parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
2514
2515         if (tb[RTA_OIF])
2516                 index = *(int *)RTA_DATA(tb[RTA_OIF]);
2517
2518         if (tb[RTA_GATEWAY])
2519                 addr = inet_ntop(r->rtm_family,
2520                                 RTA_DATA(tb[RTA_GATEWAY]),
2521                                 abuf, sizeof(abuf));
2522
2523         DBG("addr %s index %d user %p", addr, index, data->user_data);
2524
2525 out:
2526         if (data && data->callback)
2527                 data->callback(addr, index, data->user_data);
2528
2529         g_free(data);
2530
2531         return;
2532 }
2533
2534 /*
2535  * Return the interface index that contains route to host.
2536  */
2537 int __connman_inet_get_route(const char *dest_address,
2538                         connman_inet_addr_cb_t callback, void *user_data)
2539 {
2540         struct get_route_cb_data *data;
2541         struct addrinfo hints, *rp;
2542         struct __connman_inet_rtnl_handle *rth;
2543         int err;
2544
2545         DBG("dest %s", dest_address);
2546
2547         if (!dest_address)
2548                 return -EINVAL;
2549
2550         memset(&hints, 0, sizeof(hints));
2551         hints.ai_family = AF_UNSPEC;
2552         hints.ai_flags = AI_PASSIVE | AI_NUMERICSERV | AI_NUMERICHOST;
2553
2554         err = getaddrinfo(dest_address, NULL, &hints, &rp);
2555         if (err)
2556                 return -EINVAL;
2557
2558         rth = g_try_malloc0(sizeof(struct __connman_inet_rtnl_handle));
2559         if (!rth) {
2560                 freeaddrinfo(rp);
2561                 return -ENOMEM;
2562         }
2563
2564         rth->req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
2565         rth->req.n.nlmsg_flags = NLM_F_REQUEST;
2566         rth->req.n.nlmsg_type = RTM_GETROUTE;
2567         rth->req.u.r.rt.rtm_family = rp->ai_family;
2568         rth->req.u.r.rt.rtm_table = 0;
2569         rth->req.u.r.rt.rtm_protocol = 0;
2570         rth->req.u.r.rt.rtm_scope = 0;
2571         rth->req.u.r.rt.rtm_type = 0;
2572         rth->req.u.r.rt.rtm_src_len = 0;
2573         rth->req.u.r.rt.rtm_dst_len = rp->ai_addrlen << 3;
2574         rth->req.u.r.rt.rtm_tos = 0;
2575
2576         __connman_inet_rtnl_addattr_l(&rth->req.n, sizeof(rth->req), RTA_DST,
2577                                 &rp->ai_addr, rp->ai_addrlen);
2578
2579         freeaddrinfo(rp);
2580
2581         err = __connman_inet_rtnl_open(rth);
2582         if (err < 0)
2583                 goto fail;
2584
2585         data = g_try_malloc(sizeof(struct get_route_cb_data));
2586         if (!data) {
2587                 err = -ENOMEM;
2588                 goto done;
2589         }
2590
2591         data->callback = callback;
2592         data->user_data = user_data;
2593
2594 #define GET_ROUTE_TIMEOUT 2
2595         err = __connman_inet_rtnl_talk(rth, &rth->req.n, GET_ROUTE_TIMEOUT,
2596                                 get_route_cb, data);
2597         if (err < 0) {
2598                 g_free(data);
2599                 goto done;
2600         }
2601
2602         return 0;
2603
2604 done:
2605         __connman_inet_rtnl_close(rth);
2606
2607 fail:
2608         g_free(rth);
2609         return err;
2610 }
2611
2612 int connman_inet_check_ipaddress(const char *host)
2613 {
2614         struct addrinfo hints;
2615         struct addrinfo *addr;
2616         int result;
2617
2618         memset(&hints, 0, sizeof(struct addrinfo));
2619         hints.ai_flags = AI_NUMERICHOST;
2620         addr = NULL;
2621
2622         result = getaddrinfo(host, NULL, &hints, &addr);
2623         if (result == 0)
2624                 result = addr->ai_family;
2625         freeaddrinfo(addr);
2626
2627         return result;
2628 }
2629
2630 /* Check routine modified from ics-dhcp 4.2.3-P2 */
2631 bool connman_inet_check_hostname(const char *ptr, size_t len)
2632 {
2633         const char *p;
2634
2635         /*
2636          * Not empty or complete length not over 255 characters.
2637          */
2638         if ((len == 0) || (len > 256))
2639                 return false;
2640
2641         /*
2642          * Consists of [[:alnum:]-]+ labels separated by [.]
2643          * a [_] is against RFC but seems to be "widely used"
2644          */
2645         for (p = ptr; (*p != 0) && (len-- > 0); p++) {
2646
2647                 if ((*p == '-') || (*p == '_')) {
2648                         /*
2649                          * Not allowed at begin or end of a label.
2650                          */
2651                         if (((p - ptr) == 0) || (len == 0) || (p[1] == '.'))
2652                                 return false;
2653
2654                 } else if (*p == '.') {
2655                         /*
2656                          * Each label has to be 1-63 characters;
2657                          * we allow [.] at the end ('foo.bar.')
2658                          */
2659                         size_t d = p - ptr;
2660
2661                         if ((d <= 0) || (d >= 64))
2662                                 return false;
2663
2664                         ptr = p + 1; /* Jump to the next label */
2665
2666                 } else if (isalnum((unsigned char)*p) == 0) {
2667                         /*
2668                          * Also numbers at the begin are fine
2669                          */
2670                         return false;
2671                 }
2672         }
2673
2674         return true;
2675 }
2676
2677 char **__connman_inet_get_running_interfaces(void)
2678 {
2679         char **result;
2680         struct ifconf ifc;
2681         struct ifreq *ifr = NULL;
2682         int sk, i, numif, count = 0;
2683
2684         memset(&ifc, 0, sizeof(ifc));
2685
2686         sk = socket(AF_INET, SOCK_DGRAM, 0);
2687         if (sk < 0)
2688                 return NULL;
2689
2690         if (ioctl(sk, SIOCGIFCONF, &ifc) < 0)
2691                 goto error;
2692
2693         /*
2694          * Allocate some extra bytes just in case there will
2695          * be new interfaces added between two SIOCGIFCONF
2696          * calls.
2697          */
2698         ifr = g_try_malloc0(ifc.ifc_len * 2);
2699         if (!ifr)
2700                 goto error;
2701
2702         ifc.ifc_req = ifr;
2703
2704         if (ioctl(sk, SIOCGIFCONF, &ifc) < 0)
2705                 goto error;
2706
2707         numif = ifc.ifc_len / sizeof(struct ifreq);
2708
2709         result = g_try_malloc0((numif + 1) * sizeof(char *));
2710         if (!result)
2711                 goto error;
2712
2713         close(sk);
2714
2715         for (i = 0; i < numif; i++) {
2716                 struct ifreq *r = &ifr[i];
2717                 struct in6_addr *addr6;
2718                 in_addr_t addr4;
2719
2720                 /*
2721                  * Note that we do not return loopback interfaces here as they
2722                  * are not needed for our purposes.
2723                  */
2724                 switch (r->ifr_addr.sa_family) {
2725                 case AF_INET:
2726                         addr4 = ntohl(((struct sockaddr_in *)
2727                                                 &r->ifr_addr)->sin_addr.s_addr);
2728                         if (((addr4 & 0xff000000) >> 24) == 127)
2729                                 continue;
2730                         break;
2731                 case AF_INET6:
2732                         addr6 = &((struct sockaddr_in6 *)
2733                                                 &r->ifr_addr)->sin6_addr;
2734                         if (IN6_IS_ADDR_LINKLOCAL(addr6))
2735                                 continue;
2736                         break;
2737                 }
2738
2739                 result[count++] = g_strdup(r->ifr_name);
2740         }
2741
2742         g_free(ifr);
2743
2744         if (count < numif)
2745         {
2746                 char **prev_result = result;
2747                 result = g_try_realloc(result, (count + 1) * sizeof(char *));
2748                 if (!result) {
2749                         g_free(prev_result);
2750                         goto error;
2751                 }
2752         }
2753
2754         return result;
2755
2756 error:
2757         close(sk);
2758         g_free(ifr);
2759         return NULL;
2760 }
2761
2762 bool connman_inet_is_ipv6_supported()
2763 {
2764         int sk;
2765
2766         sk = socket(PF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, 0);
2767         if (sk < 0)
2768                 return false;
2769
2770         close(sk);
2771         return true;
2772 }
2773
2774 int __connman_inet_get_interface_address(int index, int family, void *address)
2775 {
2776         struct ifaddrs *ifaddr, *ifa;
2777         int err = -ENOENT;
2778         char name[IF_NAMESIZE];
2779
2780         if (!if_indextoname(index, name))
2781                 return -EINVAL;
2782
2783         DBG("index %d interface %s", index, name);
2784
2785         if (getifaddrs(&ifaddr) < 0) {
2786                 err = -errno;
2787                 DBG("Cannot get addresses err %d/%s", err, strerror(-err));
2788                 return err;
2789         }
2790
2791         for (ifa = ifaddr; ifa; ifa = ifa->ifa_next) {
2792                 if (!ifa->ifa_addr)
2793                         continue;
2794
2795                 if (strncmp(ifa->ifa_name, name, IF_NAMESIZE) == 0 &&
2796                                         ifa->ifa_addr->sa_family == family) {
2797                         if (family == AF_INET) {
2798                                 struct sockaddr_in *in4 = (struct sockaddr_in *)
2799                                         ifa->ifa_addr;
2800                                 if (in4->sin_addr.s_addr == INADDR_ANY)
2801                                         continue;
2802                                 memcpy(address, &in4->sin_addr,
2803                                                         sizeof(struct in_addr));
2804                         } else if (family == AF_INET6) {
2805                                 struct sockaddr_in6 *in6 =
2806                                         (struct sockaddr_in6 *)ifa->ifa_addr;
2807                                 if (memcmp(&in6->sin6_addr, &in6addr_any,
2808                                                 sizeof(struct in6_addr)) == 0)
2809                                         continue;
2810                                 memcpy(address, &in6->sin6_addr,
2811                                                 sizeof(struct in6_addr));
2812
2813                         } else {
2814                                 err = -EINVAL;
2815                                 goto out;
2816                         }
2817
2818                         err = 0;
2819                         break;
2820                 }
2821         }
2822
2823 out:
2824         freeifaddrs(ifaddr);
2825         return err;
2826 }
2827
2828 static int iprule_modify(int cmd, int family, uint32_t table_id,
2829                         uint32_t fwmark)
2830 {
2831         struct __connman_inet_rtnl_handle rth;
2832         int ret;
2833
2834         memset(&rth, 0, sizeof(rth));
2835
2836         rth.req.n.nlmsg_type = cmd;
2837         rth.req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
2838         rth.req.n.nlmsg_flags = NLM_F_REQUEST;
2839         rth.req.u.r.rt.rtm_family = family;
2840         rth.req.u.r.rt.rtm_protocol = RTPROT_BOOT;
2841         rth.req.u.r.rt.rtm_scope = RT_SCOPE_UNIVERSE;
2842         rth.req.u.r.rt.rtm_table = table_id;
2843         rth.req.u.r.rt.rtm_type = RTN_UNSPEC;
2844         rth.req.u.r.rt.rtm_flags = 0;
2845
2846         if (cmd == RTM_NEWRULE) {
2847                 rth.req.n.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL;
2848                 rth.req.u.r.rt.rtm_type = RTN_UNICAST;
2849         }
2850
2851         __connman_inet_rtnl_addattr32(&rth.req.n, sizeof(rth.req),
2852                                                         FRA_FWMARK, fwmark);
2853
2854         if (table_id < 256) {
2855                 rth.req.u.r.rt.rtm_table = table_id;
2856         } else {
2857                 rth.req.u.r.rt.rtm_table = RT_TABLE_UNSPEC;
2858                 __connman_inet_rtnl_addattr32(&rth.req.n, sizeof(rth.req),
2859                                                 FRA_TABLE, table_id);
2860         }
2861
2862         if (rth.req.u.r.rt.rtm_family == AF_UNSPEC)
2863                 rth.req.u.r.rt.rtm_family = AF_INET;
2864
2865         ret = __connman_inet_rtnl_open(&rth);
2866         if (ret < 0)
2867                 goto done;
2868
2869         ret = __connman_inet_rtnl_send(&rth, &rth.req.n);
2870
2871 done:
2872         __connman_inet_rtnl_close(&rth);
2873
2874         return ret;
2875 }
2876
2877 int __connman_inet_add_fwmark_rule(uint32_t table_id, int family, uint32_t fwmark)
2878 {
2879         /* ip rule add fwmark 9876 table 1234 */
2880
2881         return iprule_modify(RTM_NEWRULE, family, table_id, fwmark);
2882 }
2883
2884 int __connman_inet_del_fwmark_rule(uint32_t table_id, int family, uint32_t fwmark)
2885 {
2886         return iprule_modify(RTM_DELRULE, family, table_id, fwmark);
2887 }
2888
2889 static int iproute_default_modify(int cmd, uint32_t table_id, int ifindex,
2890                         const char *gateway)
2891 {
2892         struct __connman_inet_rtnl_handle rth;
2893         unsigned char buf[sizeof(struct in6_addr)];
2894         int ret, len;
2895         int family = connman_inet_check_ipaddress(gateway);
2896
2897         switch (family) {
2898         case AF_INET:
2899                 len = 4;
2900                 break;
2901         case AF_INET6:
2902                 len = 16;
2903                 break;
2904         default:
2905                 return -EINVAL;
2906         }
2907
2908         ret = inet_pton(family, gateway, buf);
2909         if (ret <= 0)
2910                 return -EINVAL;
2911
2912         memset(&rth, 0, sizeof(rth));
2913
2914         rth.req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
2915         rth.req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL;
2916         rth.req.n.nlmsg_type = cmd;
2917         rth.req.u.r.rt.rtm_family = family;
2918         rth.req.u.r.rt.rtm_table = RT_TABLE_MAIN;
2919         rth.req.u.r.rt.rtm_scope = RT_SCOPE_NOWHERE;
2920         rth.req.u.r.rt.rtm_protocol = RTPROT_BOOT;
2921         rth.req.u.r.rt.rtm_scope = RT_SCOPE_UNIVERSE;
2922         rth.req.u.r.rt.rtm_type = RTN_UNICAST;
2923
2924         __connman_inet_rtnl_addattr_l(&rth.req.n, sizeof(rth.req), RTA_GATEWAY,
2925                                                                 buf, len);
2926         if (table_id < 256) {
2927                 rth.req.u.r.rt.rtm_table = table_id;
2928         } else {
2929                 rth.req.u.r.rt.rtm_table = RT_TABLE_UNSPEC;
2930                 __connman_inet_rtnl_addattr32(&rth.req.n, sizeof(rth.req),
2931                                                         RTA_TABLE, table_id);
2932         }
2933
2934         __connman_inet_rtnl_addattr32(&rth.req.n, sizeof(rth.req),
2935                                                         RTA_OIF, ifindex);
2936
2937         ret = __connman_inet_rtnl_open(&rth);
2938         if (ret < 0)
2939                 goto done;
2940
2941         ret = __connman_inet_rtnl_send(&rth, &rth.req.n);
2942
2943 done:
2944         __connman_inet_rtnl_close(&rth);
2945
2946         return ret;
2947 }
2948
2949 int __connman_inet_add_default_to_table(uint32_t table_id, int ifindex,
2950                                                 const char *gateway)
2951 {
2952         /* ip route add default via 1.2.3.4 dev wlan0 table 1234 */
2953
2954         return iproute_default_modify(RTM_NEWROUTE, table_id, ifindex, gateway);
2955 }
2956
2957 int __connman_inet_del_default_from_table(uint32_t table_id, int ifindex,
2958                                                 const char *gateway)
2959 {
2960         /* ip route del default via 1.2.3.4 dev wlan0 table 1234 */
2961
2962         return iproute_default_modify(RTM_DELROUTE, table_id, ifindex, gateway);
2963 }
2964
2965 int __connman_inet_get_interface_ll_address(int index, int family,
2966                                                                 void *address)
2967 {
2968         struct ifaddrs *ifaddr, *ifa;
2969         int err = -ENOENT;
2970         char name[IF_NAMESIZE];
2971
2972         if (!if_indextoname(index, name))
2973                 return -EINVAL;
2974
2975         DBG("index %d interface %s", index, name);
2976
2977         if (getifaddrs(&ifaddr) < 0) {
2978                 err = -errno;
2979                 DBG("Cannot get addresses err %d/%s", err, strerror(-err));
2980                 return err;
2981         }
2982
2983         for (ifa = ifaddr; ifa; ifa = ifa->ifa_next) {
2984                 if (!ifa->ifa_addr)
2985                         continue;
2986
2987                 if (strncmp(ifa->ifa_name, name, IF_NAMESIZE) == 0 &&
2988                                         ifa->ifa_addr->sa_family == family) {
2989                         if (family == AF_INET) {
2990                                 struct sockaddr_in *in4 = (struct sockaddr_in *)
2991                                         ifa->ifa_addr;
2992                                 if (in4->sin_addr.s_addr == INADDR_ANY)
2993                                         continue;
2994                                 if ((in4->sin_addr.s_addr & IN_CLASSB_NET) !=
2995                                                 ((in_addr_t) 0xa9fe0000))
2996                                         continue;
2997                                 memcpy(address, &in4->sin_addr,
2998                                                         sizeof(struct in_addr));
2999                         } else if (family == AF_INET6) {
3000                                 struct sockaddr_in6 *in6 =
3001                                         (struct sockaddr_in6 *)ifa->ifa_addr;
3002                                 if (memcmp(&in6->sin6_addr, &in6addr_any,
3003                                                 sizeof(struct in6_addr)) == 0)
3004                                         continue;
3005                                 if (!IN6_IS_ADDR_LINKLOCAL(&in6->sin6_addr))
3006                                         continue;
3007
3008                                 memcpy(address, &in6->sin6_addr,
3009                                                 sizeof(struct in6_addr));
3010                         } else {
3011                                 err = -EINVAL;
3012                                 goto out;
3013                         }
3014
3015                         err = 0;
3016                         break;
3017                 }
3018         }
3019
3020 out:
3021         freeifaddrs(ifaddr);
3022         return err;
3023 }
3024
3025 int __connman_inet_get_address_netmask(int ifindex,
3026                                         struct sockaddr_in *address,
3027                                         struct sockaddr_in *netmask)
3028 {
3029         int sk, ret = -EINVAL;
3030         struct ifreq ifr;
3031
3032         DBG("index %d", ifindex);
3033
3034         sk = socket(PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
3035         if (sk < 0)
3036                 return -EINVAL;
3037
3038         memset(&ifr, 0, sizeof(ifr));
3039         ifr.ifr_ifindex = ifindex;
3040
3041         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0)
3042                 goto out;
3043
3044         if (ioctl(sk, SIOCGIFNETMASK, &ifr) < 0)
3045                 goto out;
3046
3047         memcpy(netmask, (struct sockaddr_in *)&ifr.ifr_netmask,
3048                                                 sizeof(struct sockaddr_in));
3049
3050         if (ioctl(sk, SIOCGIFADDR, &ifr) < 0)
3051                 goto out;
3052
3053         memcpy(address, (struct sockaddr_in *)&ifr.ifr_addr,
3054                                                 sizeof(struct sockaddr_in));
3055         ret = 0;
3056
3057 out:
3058         close(sk);
3059         return ret;
3060 }