1 /* 2 * Copyright 2008, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <stdio.h> 18 #include <stdlib.h> 19 #include <unistd.h> 20 #include <string.h> 21 #include <errno.h> 22 #include <pthread.h> 23 24 #include <sys/socket.h> 25 #include <sys/select.h> 26 #include <sys/types.h> 27 #include <netinet/in.h> 28 #include <arpa/inet.h> 29 #include <net/if.h> 30 #include <netdb.h> 31 32 #include <linux/if.h> 33 #include <linux/if_ether.h> 34 #include <linux/if_arp.h> 35 #include <linux/netlink.h> 36 #include <linux/route.h> 37 #include <linux/ipv6_route.h> 38 #include <linux/rtnetlink.h> 39 #include <linux/sockios.h> 40 41 #include "netutils/ifc.h" 42 43 #ifdef ANDROID 44 #define LOG_TAG "NetUtils" 45 #include <cutils/log.h> 46 #include <cutils/properties.h> 47 #else 48 #include <stdio.h> 49 #include <string.h> 50 #define ALOGD printf 51 #define ALOGW printf 52 #endif 53 54 #if defined(__ANDROID__) 55 /* SIOCKILLADDR is an Android extension. */ 56 #define SIOCKILLADDR 0x8939 57 #endif 58 59 static int ifc_ctl_sock = -1; 60 static int ifc_ctl_sock6 = -1; 61 static pthread_mutex_t ifc_sock_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP; 62 static pthread_mutex_t ifc_sock6_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP; 63 void printerr(char *fmt, ...); 64 65 #define DBG 0 66 #define INET_ADDRLEN 4 67 #define INET6_ADDRLEN 16 68 69 in_addr_t prefixLengthToIpv4Netmask(int prefix_length) 70 { 71 in_addr_t mask = 0; 72 73 // C99 (6.5.7): shifts of 32 bits have undefined results 74 if (prefix_length <= 0 || prefix_length > 32) { 75 return 0; 76 } 77 78 mask = ~mask << (32 - prefix_length); 79 mask = htonl(mask); 80 81 return mask; 82 } 83 84 int ipv4NetmaskToPrefixLength(in_addr_t mask) 85 { 86 int prefixLength = 0; 87 uint32_t m = (uint32_t)ntohl(mask); 88 while (m & 0x80000000) { 89 prefixLength++; 90 m = m << 1; 91 } 92 return prefixLength; 93 } 94 95 static const char *ipaddr_to_string(in_addr_t addr) 96 { 97 struct in_addr in_addr; 98 99 in_addr.s_addr = addr; 100 return inet_ntoa(in_addr); 101 } 102 103 int string_to_ip(const char *string, struct sockaddr_storage *ss) { 104 struct addrinfo hints, *ai; 105 int ret; 106 107 if (ss == NULL) { 108 return -EFAULT; 109 } 110 111 memset(&hints, 0, sizeof(hints)); 112 hints.ai_family = AF_UNSPEC; 113 hints.ai_flags = AI_NUMERICHOST; 114 hints.ai_socktype = SOCK_DGRAM; 115 116 ret = getaddrinfo(string, NULL, &hints, &ai); 117 if (ret == 0) { 118 memcpy(ss, ai->ai_addr, ai->ai_addrlen); 119 freeaddrinfo(ai); 120 } 121 122 return ret; 123 } 124 125 int ifc_init(void) 126 { 127 int ret; 128 129 pthread_mutex_lock(&ifc_sock_mutex); 130 if (ifc_ctl_sock == -1) { 131 ifc_ctl_sock = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0); 132 if (ifc_ctl_sock < 0) { 133 printerr("socket() failed: %s\n", strerror(errno)); 134 } 135 } 136 137 ret = ifc_ctl_sock < 0 ? -1 : 0; 138 if (DBG) printerr("ifc_init_returning %d", ret); 139 return ret; 140 } 141 142 int ifc_init6(void) 143 { 144 pthread_mutex_lock(&ifc_sock6_mutex); 145 if (ifc_ctl_sock6 == -1) { 146 ifc_ctl_sock6 = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, 0); 147 if (ifc_ctl_sock6 < 0) { 148 printerr("socket() failed: %s\n", strerror(errno)); 149 } 150 } 151 return ifc_ctl_sock6 < 0 ? -1 : 0; 152 } 153 154 void ifc_close(void) 155 { 156 if (DBG) printerr("ifc_close"); 157 if (ifc_ctl_sock != -1) { 158 (void)close(ifc_ctl_sock); 159 ifc_ctl_sock = -1; 160 } 161 pthread_mutex_unlock(&ifc_sock_mutex); 162 } 163 164 void ifc_close6(void) 165 { 166 if (ifc_ctl_sock6 != -1) { 167 (void)close(ifc_ctl_sock6); 168 ifc_ctl_sock6 = -1; 169 } 170 pthread_mutex_unlock(&ifc_sock6_mutex); 171 } 172 173 static void ifc_init_ifr(const char *name, struct ifreq *ifr) 174 { 175 memset(ifr, 0, sizeof(struct ifreq)); 176 strncpy(ifr->ifr_name, name, IFNAMSIZ); 177 ifr->ifr_name[IFNAMSIZ - 1] = 0; 178 } 179 180 int ifc_get_hwaddr(const char *name, void *ptr) 181 { 182 int r; 183 struct ifreq ifr; 184 ifc_init_ifr(name, &ifr); 185 186 r = ioctl(ifc_ctl_sock, SIOCGIFHWADDR, &ifr); 187 if(r < 0) return -1; 188 189 memcpy(ptr, &ifr.ifr_hwaddr.sa_data, ETH_ALEN); 190 return 0; 191 } 192 193 int ifc_get_ifindex(const char *name, int *if_indexp) 194 { 195 int r; 196 struct ifreq ifr; 197 ifc_init_ifr(name, &ifr); 198 199 r = ioctl(ifc_ctl_sock, SIOCGIFINDEX, &ifr); 200 if(r < 0) return -1; 201 202 *if_indexp = ifr.ifr_ifindex; 203 return 0; 204 } 205 206 static int ifc_set_flags(const char *name, unsigned set, unsigned clr) 207 { 208 struct ifreq ifr; 209 ifc_init_ifr(name, &ifr); 210 211 if(ioctl(ifc_ctl_sock, SIOCGIFFLAGS, &ifr) < 0) return -1; 212 ifr.ifr_flags = (ifr.ifr_flags & (~clr)) | set; 213 return ioctl(ifc_ctl_sock, SIOCSIFFLAGS, &ifr); 214 } 215 216 int ifc_up(const char *name) 217 { 218 int ret = ifc_set_flags(name, IFF_UP, 0); 219 if (DBG) printerr("ifc_up(%s) = %d", name, ret); 220 return ret; 221 } 222 223 int ifc_down(const char *name) 224 { 225 int ret = ifc_set_flags(name, 0, IFF_UP); 226 if (DBG) printerr("ifc_down(%s) = %d", name, ret); 227 return ret; 228 } 229 230 static void init_sockaddr_in(struct sockaddr *sa, in_addr_t addr) 231 { 232 struct sockaddr_in *sin = (struct sockaddr_in *) sa; 233 sin->sin_family = AF_INET; 234 sin->sin_port = 0; 235 sin->sin_addr.s_addr = addr; 236 } 237 238 int ifc_set_addr(const char *name, in_addr_t addr) 239 { 240 struct ifreq ifr; 241 int ret; 242 243 ifc_init_ifr(name, &ifr); 244 init_sockaddr_in(&ifr.ifr_addr, addr); 245 246 ret = ioctl(ifc_ctl_sock, SIOCSIFADDR, &ifr); 247 if (DBG) printerr("ifc_set_addr(%s, xx) = %d", name, ret); 248 return ret; 249 } 250 251 /* 252 * Adds or deletes an IP address on an interface. 253 * 254 * Action is one of: 255 * - RTM_NEWADDR (to add a new address) 256 * - RTM_DELADDR (to delete an existing address) 257 * 258 * Returns zero on success and negative errno on failure. 259 */ 260 int ifc_act_on_address(int action, const char *name, const char *address, 261 int prefixlen) { 262 int ifindex, s, len, ret; 263 struct sockaddr_storage ss; 264 int saved_errno; 265 void *addr; 266 size_t addrlen; 267 struct { 268 struct nlmsghdr n; 269 struct ifaddrmsg r; 270 // Allow for IPv6 address, headers, IPv4 broadcast addr and padding. 271 char attrbuf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) + 272 NLMSG_ALIGN(sizeof(struct rtattr)) + 273 NLMSG_ALIGN(INET6_ADDRLEN) + 274 NLMSG_ALIGN(sizeof(struct rtattr)) + 275 NLMSG_ALIGN(INET_ADDRLEN)]; 276 } req; 277 struct rtattr *rta; 278 struct nlmsghdr *nh; 279 struct nlmsgerr *err; 280 char buf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) + 281 NLMSG_ALIGN(sizeof(struct nlmsgerr)) + 282 NLMSG_ALIGN(sizeof(struct nlmsghdr))]; 283 284 // Get interface ID. 285 ifindex = if_nametoindex(name); 286 if (ifindex == 0) { 287 return -errno; 288 } 289 290 // Convert string representation to sockaddr_storage. 291 ret = string_to_ip(address, &ss); 292 if (ret) { 293 return ret; 294 } 295 296 // Determine address type and length. 297 if (ss.ss_family == AF_INET) { 298 struct sockaddr_in *sin = (struct sockaddr_in *) &ss; 299 addr = &sin->sin_addr; 300 addrlen = INET_ADDRLEN; 301 } else if (ss.ss_family == AF_INET6) { 302 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) &ss; 303 addr = &sin6->sin6_addr; 304 addrlen = INET6_ADDRLEN; 305 } else { 306 return -EAFNOSUPPORT; 307 } 308 309 // Fill in netlink structures. 310 memset(&req, 0, sizeof(req)); 311 312 // Netlink message header. 313 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.r)); 314 req.n.nlmsg_type = action; 315 req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; 316 req.n.nlmsg_pid = getpid(); 317 318 // Interface address message header. 319 req.r.ifa_family = ss.ss_family; 320 req.r.ifa_prefixlen = prefixlen; 321 req.r.ifa_index = ifindex; 322 323 // Routing attribute. Contains the actual IP address. 324 rta = (struct rtattr *) (((char *) &req) + NLMSG_ALIGN(req.n.nlmsg_len)); 325 rta->rta_type = IFA_LOCAL; 326 rta->rta_len = RTA_LENGTH(addrlen); 327 req.n.nlmsg_len = NLMSG_ALIGN(req.n.nlmsg_len) + RTA_LENGTH(addrlen); 328 memcpy(RTA_DATA(rta), addr, addrlen); 329 330 // Add an explicit IFA_BROADCAST for IPv4 RTM_NEWADDRs. 331 if (ss.ss_family == AF_INET && action == RTM_NEWADDR) { 332 rta = (struct rtattr *) (((char *) &req) + NLMSG_ALIGN(req.n.nlmsg_len)); 333 rta->rta_type = IFA_BROADCAST; 334 rta->rta_len = RTA_LENGTH(addrlen); 335 req.n.nlmsg_len = NLMSG_ALIGN(req.n.nlmsg_len) + RTA_LENGTH(addrlen); 336 ((struct in_addr *)addr)->s_addr |= htonl((1<<(32-prefixlen))-1); 337 memcpy(RTA_DATA(rta), addr, addrlen); 338 } 339 340 s = socket(PF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE); 341 if (s < 0) { 342 return -errno; 343 } 344 345 if (send(s, &req, req.n.nlmsg_len, 0) < 0) { 346 saved_errno = errno; 347 close(s); 348 return -saved_errno; 349 } 350 351 len = recv(s, buf, sizeof(buf), 0); 352 saved_errno = errno; 353 close(s); 354 if (len < 0) { 355 return -saved_errno; 356 } 357 358 // Parse the acknowledgement to find the return code. 359 nh = (struct nlmsghdr *) buf; 360 if (!NLMSG_OK(nh, (unsigned) len) || nh->nlmsg_type != NLMSG_ERROR) { 361 return -EINVAL; 362 } 363 err = NLMSG_DATA(nh); 364 365 // Return code is negative errno. 366 return err->error; 367 } 368 369 int ifc_add_address(const char *name, const char *address, int prefixlen) { 370 return ifc_act_on_address(RTM_NEWADDR, name, address, prefixlen); 371 } 372 373 int ifc_del_address(const char *name, const char * address, int prefixlen) { 374 return ifc_act_on_address(RTM_DELADDR, name, address, prefixlen); 375 } 376 377 /* 378 * Clears IPv6 addresses on the specified interface. 379 */ 380 int ifc_clear_ipv6_addresses(const char *name) { 381 char rawaddrstr[INET6_ADDRSTRLEN], addrstr[INET6_ADDRSTRLEN]; 382 unsigned int prefixlen; 383 int lasterror = 0, i, j, ret; 384 char ifname[64]; // Currently, IFNAMSIZ = 16. 385 FILE *f = fopen("/proc/net/if_inet6", "r"); 386 if (!f) { 387 return -errno; 388 } 389 390 // Format: 391 // 20010db8000a0001fc446aa4b5b347ed 03 40 00 01 wlan0 392 while (fscanf(f, "%32s %*02x %02x %*02x %*02x %63s\n", 393 rawaddrstr, &prefixlen, ifname) == 3) { 394 // Is this the interface we're looking for? 395 if (strcmp(name, ifname)) { 396 continue; 397 } 398 399 // Put the colons back into the address. 400 for (i = 0, j = 0; i < 32; i++, j++) { 401 addrstr[j] = rawaddrstr[i]; 402 if (i % 4 == 3) { 403 addrstr[++j] = ':'; 404 } 405 } 406 addrstr[j - 1] = '\0'; 407 408 // Don't delete the link-local address as well, or it will disable IPv6 409 // on the interface. 410 if (strncmp(addrstr, "fe80:", 5) == 0) { 411 continue; 412 } 413 414 ret = ifc_del_address(ifname, addrstr, prefixlen); 415 if (ret) { 416 ALOGE("Deleting address %s/%d on %s: %s", addrstr, prefixlen, ifname, 417 strerror(-ret)); 418 lasterror = ret; 419 } 420 } 421 422 fclose(f); 423 return lasterror; 424 } 425 426 /* 427 * Clears IPv4 addresses on the specified interface. 428 */ 429 void ifc_clear_ipv4_addresses(const char *name) { 430 unsigned count, addr; 431 ifc_init(); 432 for (count=0, addr=1;((addr != 0) && (count < 255)); count++) { 433 if (ifc_get_addr(name, &addr) < 0) 434 break; 435 if (addr) 436 ifc_set_addr(name, 0); 437 } 438 ifc_close(); 439 } 440 441 /* 442 * Clears all IP addresses on the specified interface. 443 */ 444 int ifc_clear_addresses(const char *name) { 445 ifc_clear_ipv4_addresses(name); 446 return ifc_clear_ipv6_addresses(name); 447 } 448 449 int ifc_set_hwaddr(const char *name, const void *ptr) 450 { 451 struct ifreq ifr; 452 ifc_init_ifr(name, &ifr); 453 454 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER; 455 memcpy(&ifr.ifr_hwaddr.sa_data, ptr, ETH_ALEN); 456 return ioctl(ifc_ctl_sock, SIOCSIFHWADDR, &ifr); 457 } 458 459 int ifc_set_mask(const char *name, in_addr_t mask) 460 { 461 struct ifreq ifr; 462 int ret; 463 464 ifc_init_ifr(name, &ifr); 465 init_sockaddr_in(&ifr.ifr_addr, mask); 466 467 ret = ioctl(ifc_ctl_sock, SIOCSIFNETMASK, &ifr); 468 if (DBG) printerr("ifc_set_mask(%s, xx) = %d", name, ret); 469 return ret; 470 } 471 472 int ifc_set_prefixLength(const char *name, int prefixLength) 473 { 474 struct ifreq ifr; 475 // TODO - support ipv6 476 if (prefixLength > 32 || prefixLength < 0) return -1; 477 478 in_addr_t mask = prefixLengthToIpv4Netmask(prefixLength); 479 ifc_init_ifr(name, &ifr); 480 init_sockaddr_in(&ifr.ifr_addr, mask); 481 482 return ioctl(ifc_ctl_sock, SIOCSIFNETMASK, &ifr); 483 } 484 485 int ifc_get_addr(const char *name, in_addr_t *addr) 486 { 487 struct ifreq ifr; 488 int ret = 0; 489 490 ifc_init_ifr(name, &ifr); 491 if (addr != NULL) { 492 ret = ioctl(ifc_ctl_sock, SIOCGIFADDR, &ifr); 493 if (ret < 0) { 494 *addr = 0; 495 } else { 496 *addr = ((struct sockaddr_in*) &ifr.ifr_addr)->sin_addr.s_addr; 497 } 498 } 499 return ret; 500 } 501 502 int ifc_get_info(const char *name, in_addr_t *addr, int *prefixLength, unsigned *flags) 503 { 504 struct ifreq ifr; 505 ifc_init_ifr(name, &ifr); 506 507 if (addr != NULL) { 508 if(ioctl(ifc_ctl_sock, SIOCGIFADDR, &ifr) < 0) { 509 *addr = 0; 510 } else { 511 *addr = ((struct sockaddr_in*) &ifr.ifr_addr)->sin_addr.s_addr; 512 } 513 } 514 515 if (prefixLength != NULL) { 516 if(ioctl(ifc_ctl_sock, SIOCGIFNETMASK, &ifr) < 0) { 517 *prefixLength = 0; 518 } else { 519 *prefixLength = ipv4NetmaskToPrefixLength( 520 ((struct sockaddr_in*) &ifr.ifr_addr)->sin_addr.s_addr); 521 } 522 } 523 524 if (flags != NULL) { 525 if(ioctl(ifc_ctl_sock, SIOCGIFFLAGS, &ifr) < 0) { 526 *flags = 0; 527 } else { 528 *flags = ifr.ifr_flags; 529 } 530 } 531 532 return 0; 533 } 534 535 int ifc_act_on_ipv4_route(int action, const char *ifname, struct in_addr dst, int prefix_length, 536 struct in_addr gw) 537 { 538 struct rtentry rt; 539 int result; 540 in_addr_t netmask; 541 542 memset(&rt, 0, sizeof(rt)); 543 544 rt.rt_dst.sa_family = AF_INET; 545 rt.rt_dev = (void*) ifname; 546 547 netmask = prefixLengthToIpv4Netmask(prefix_length); 548 init_sockaddr_in(&rt.rt_genmask, netmask); 549 init_sockaddr_in(&rt.rt_dst, dst.s_addr); 550 rt.rt_flags = RTF_UP; 551 552 if (prefix_length == 32) { 553 rt.rt_flags |= RTF_HOST; 554 } 555 556 if (gw.s_addr != 0) { 557 rt.rt_flags |= RTF_GATEWAY; 558 init_sockaddr_in(&rt.rt_gateway, gw.s_addr); 559 } 560 561 ifc_init(); 562 563 if (ifc_ctl_sock < 0) { 564 ifc_close(); 565 return -errno; 566 } 567 568 result = ioctl(ifc_ctl_sock, action, &rt); 569 if (result < 0) { 570 if (errno == EEXIST) { 571 result = 0; 572 } else { 573 result = -errno; 574 } 575 } 576 ifc_close(); 577 return result; 578 } 579 580 /* deprecated - v4 only */ 581 int ifc_create_default_route(const char *name, in_addr_t gw) 582 { 583 struct in_addr in_dst, in_gw; 584 585 in_dst.s_addr = 0; 586 in_gw.s_addr = gw; 587 588 int ret = ifc_act_on_ipv4_route(SIOCADDRT, name, in_dst, 0, in_gw); 589 if (DBG) printerr("ifc_create_default_route(%s, %d) = %d", name, gw, ret); 590 return ret; 591 } 592 593 // Needed by code in hidden partner repositories / branches, so don't delete. 594 int ifc_enable(const char *ifname) 595 { 596 int result; 597 598 ifc_init(); 599 result = ifc_up(ifname); 600 ifc_close(); 601 return result; 602 } 603 604 // Needed by code in hidden partner repositories / branches, so don't delete. 605 int ifc_disable(const char *ifname) 606 { 607 unsigned addr, count; 608 int result; 609 610 ifc_init(); 611 result = ifc_down(ifname); 612 613 ifc_set_addr(ifname, 0); 614 for (count=0, addr=1;((addr != 0) && (count < 255)); count++) { 615 if (ifc_get_addr(ifname, &addr) < 0) 616 break; 617 if (addr) 618 ifc_set_addr(ifname, 0); 619 } 620 621 ifc_close(); 622 return result; 623 } 624 625 int ifc_reset_connections(const char *ifname, const int reset_mask) 626 { 627 #if defined(__ANDROID__) 628 int result, success; 629 in_addr_t myaddr = 0; 630 struct ifreq ifr; 631 struct in6_ifreq ifr6; 632 633 if (reset_mask & RESET_IPV4_ADDRESSES) { 634 /* IPv4. Clear connections on the IP address. */ 635 ifc_init(); 636 if (!(reset_mask & RESET_IGNORE_INTERFACE_ADDRESS)) { 637 ifc_get_info(ifname, &myaddr, NULL, NULL); 638 } 639 ifc_init_ifr(ifname, &ifr); 640 init_sockaddr_in(&ifr.ifr_addr, myaddr); 641 result = ioctl(ifc_ctl_sock, SIOCKILLADDR, &ifr); 642 ifc_close(); 643 } else { 644 result = 0; 645 } 646 647 if (reset_mask & RESET_IPV6_ADDRESSES) { 648 /* 649 * IPv6. On Linux, when an interface goes down it loses all its IPv6 650 * addresses, so we don't know which connections belonged to that interface 651 * So we clear all unused IPv6 connections on the device by specifying an 652 * empty IPv6 address. 653 */ 654 ifc_init6(); 655 // This implicitly specifies an address of ::, i.e., kill all IPv6 sockets. 656 memset(&ifr6, 0, sizeof(ifr6)); 657 success = ioctl(ifc_ctl_sock6, SIOCKILLADDR, &ifr6); 658 if (result == 0) { 659 result = success; 660 } 661 ifc_close6(); 662 } 663 664 return result; 665 #else 666 return 0; 667 #endif 668 } 669 670 /* 671 * Removes the default route for the named interface. 672 */ 673 int ifc_remove_default_route(const char *ifname) 674 { 675 struct rtentry rt; 676 int result; 677 678 ifc_init(); 679 memset(&rt, 0, sizeof(rt)); 680 rt.rt_dev = (void *)ifname; 681 rt.rt_flags = RTF_UP|RTF_GATEWAY; 682 init_sockaddr_in(&rt.rt_dst, 0); 683 if ((result = ioctl(ifc_ctl_sock, SIOCDELRT, &rt)) < 0) { 684 ALOGD("failed to remove default route for %s: %s", ifname, strerror(errno)); 685 } 686 ifc_close(); 687 return result; 688 } 689 690 int 691 ifc_configure(const char *ifname, 692 in_addr_t address, 693 uint32_t prefixLength, 694 in_addr_t gateway, 695 in_addr_t dns1, 696 in_addr_t dns2) { 697 698 char dns_prop_name[PROPERTY_KEY_MAX]; 699 700 ifc_init(); 701 702 if (ifc_up(ifname)) { 703 printerr("failed to turn on interface %s: %s\n", ifname, strerror(errno)); 704 ifc_close(); 705 return -1; 706 } 707 if (ifc_set_addr(ifname, address)) { 708 printerr("failed to set ipaddr %s: %s\n", ipaddr_to_string(address), strerror(errno)); 709 ifc_close(); 710 return -1; 711 } 712 if (ifc_set_prefixLength(ifname, prefixLength)) { 713 printerr("failed to set prefixLength %d: %s\n", prefixLength, strerror(errno)); 714 ifc_close(); 715 return -1; 716 } 717 if (ifc_create_default_route(ifname, gateway)) { 718 printerr("failed to set default route %s: %s\n", ipaddr_to_string(gateway), strerror(errno)); 719 ifc_close(); 720 return -1; 721 } 722 723 ifc_close(); 724 725 snprintf(dns_prop_name, sizeof(dns_prop_name), "net.%s.dns1", ifname); 726 property_set(dns_prop_name, dns1 ? ipaddr_to_string(dns1) : ""); 727 snprintf(dns_prop_name, sizeof(dns_prop_name), "net.%s.dns2", ifname); 728 property_set(dns_prop_name, dns2 ? ipaddr_to_string(dns2) : ""); 729 730 return 0; 731 } 732
