5 * Copyright (C) 2007-2010 Intel Corporation. All rights reserved.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
32 #include <sys/ioctl.h>
33 #include <sys/socket.h>
34 #include <arpa/inet.h>
35 #include <net/route.h>
36 #include <net/ethernet.h>
37 #include <linux/if_arp.h>
38 #include <linux/wireless.h>
42 #define NLMSG_TAIL(nmsg) \
43 ((struct rtattr *) (((uint8_t*) (nmsg)) + \
44 NLMSG_ALIGN((nmsg)->nlmsg_len)))
46 static int add_rtattr(struct nlmsghdr *n, size_t max_length, int type,
47 const void *data, size_t data_length)
52 length = RTA_LENGTH(data_length);
54 if (NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(length) > max_length)
59 rta->rta_len = length;
60 memcpy(RTA_DATA(rta), data, data_length);
61 n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(length);
66 int __connman_inet_modify_address(int cmd, int flags,
67 int index, int family,
69 unsigned char prefixlen,
70 const char *broadcast)
72 uint8_t request[NLMSG_ALIGN(sizeof(struct nlmsghdr)) +
73 NLMSG_ALIGN(sizeof(struct ifaddrmsg)) +
74 RTA_LENGTH(sizeof(struct in6_addr))];
76 struct nlmsghdr *header;
77 struct sockaddr_nl nl_addr;
78 struct ifaddrmsg *ifaddrmsg;
79 struct in_addr ipv4_addr, ipv4_bcast;
87 memset(&request, 0, sizeof(request));
89 header = (struct nlmsghdr *)request;
90 header->nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
91 header->nlmsg_type = cmd;
92 header->nlmsg_flags = NLM_F_REQUEST | flags;
93 header->nlmsg_seq = 1;
95 ifaddrmsg = NLMSG_DATA(header);
96 ifaddrmsg->ifa_family = family;
97 ifaddrmsg->ifa_prefixlen = prefixlen;
98 ifaddrmsg->ifa_flags = IFA_F_PERMANENT;
99 ifaddrmsg->ifa_scope = RT_SCOPE_UNIVERSE;
100 ifaddrmsg->ifa_index = index;
102 if (family == AF_INET) {
103 if (inet_pton(AF_INET, address, &ipv4_addr) < 1)
106 if (broadcast != NULL)
107 inet_pton(AF_INET, broadcast, &ipv4_bcast);
109 ipv4_bcast.s_addr = ipv4_addr.s_addr |
110 htonl(0xfffffffflu >> prefixlen);
112 if ((err = add_rtattr(header, sizeof(request), IFA_LOCAL,
113 &ipv4_addr, sizeof(ipv4_addr))) < 0)
116 if ((err = add_rtattr(header, sizeof(request), IFA_BROADCAST,
117 &ipv4_bcast, sizeof(ipv4_bcast))) < 0)
123 sk = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE);
127 memset(&nl_addr, 0, sizeof(nl_addr));
128 nl_addr.nl_family = AF_NETLINK;
130 if ((err = sendto(sk, request, header->nlmsg_len, 0,
131 (struct sockaddr *) &nl_addr, sizeof(nl_addr))) < 0)
142 int connman_inet_ifindex(const char *name)
150 sk = socket(PF_INET, SOCK_DGRAM, 0);
154 memset(&ifr, 0, sizeof(ifr));
155 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
157 err = ioctl(sk, SIOCGIFINDEX, &ifr);
164 return ifr.ifr_ifindex;
167 char *connman_inet_ifname(int index)
175 sk = socket(PF_INET, SOCK_DGRAM, 0);
179 memset(&ifr, 0, sizeof(ifr));
180 ifr.ifr_ifindex = index;
182 err = ioctl(sk, SIOCGIFNAME, &ifr);
189 return strdup(ifr.ifr_name);
192 short int connman_inet_ifflags(int index)
197 sk = socket(PF_INET, SOCK_DGRAM, 0);
201 memset(&ifr, 0, sizeof(ifr));
202 ifr.ifr_ifindex = index;
204 if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
209 if (ioctl(sk, SIOCGIFFLAGS, &ifr) < 0) {
222 int connman_inet_ifup(int index)
227 sk = socket(PF_INET, SOCK_DGRAM, 0);
231 memset(&ifr, 0, sizeof(ifr));
232 ifr.ifr_ifindex = index;
234 if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
239 if (ioctl(sk, SIOCGIFFLAGS, &ifr) < 0) {
244 if (ifr.ifr_flags & IFF_UP) {
249 ifr.ifr_flags |= IFF_UP;
251 if (ioctl(sk, SIOCSIFFLAGS, &ifr) < 0) {
264 int connman_inet_ifdown(int index)
269 sk = socket(PF_INET, SOCK_DGRAM, 0);
273 memset(&ifr, 0, sizeof(ifr));
274 ifr.ifr_ifindex = index;
276 if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
281 if (ioctl(sk, SIOCGIFFLAGS, &ifr) < 0) {
286 if (!(ifr.ifr_flags & IFF_UP)) {
291 ifr.ifr_flags &= ~IFF_UP;
293 if (ioctl(sk, SIOCSIFFLAGS, &ifr) < 0)
304 static char *index2addr(int index)
307 struct ether_addr eth;
314 sk = socket(PF_INET, SOCK_DGRAM, 0);
318 memset(&ifr, 0, sizeof(ifr));
319 ifr.ifr_ifindex = index;
321 err = ioctl(sk, SIOCGIFNAME, &ifr);
324 err = ioctl(sk, SIOCGIFHWADDR, &ifr);
335 memcpy(ð, &ifr.ifr_hwaddr.sa_data, sizeof(eth));
336 snprintf(str, 18, "%02X:%02X:%02X:%02X:%02X:%02X",
337 eth.ether_addr_octet[0],
338 eth.ether_addr_octet[1],
339 eth.ether_addr_octet[2],
340 eth.ether_addr_octet[3],
341 eth.ether_addr_octet[4],
342 eth.ether_addr_octet[5]);
347 static char *index2ident(int index, const char *prefix)
350 struct ether_addr eth;
357 sk = socket(PF_INET, SOCK_DGRAM, 0);
361 memset(&ifr, 0, sizeof(ifr));
362 ifr.ifr_ifindex = index;
364 err = ioctl(sk, SIOCGIFNAME, &ifr);
367 err = ioctl(sk, SIOCGIFHWADDR, &ifr);
374 len = prefix ? strlen(prefix) + 18 : 18;
380 memcpy(ð, &ifr.ifr_hwaddr.sa_data, sizeof(eth));
381 snprintf(str, len, "%s%02x%02x%02x%02x%02x%02x",
382 prefix ? prefix : "",
383 eth.ether_addr_octet[0],
384 eth.ether_addr_octet[1],
385 eth.ether_addr_octet[2],
386 eth.ether_addr_octet[3],
387 eth.ether_addr_octet[4],
388 eth.ether_addr_octet[5]);
393 connman_bool_t connman_inet_is_cfg80211(int index)
395 connman_bool_t result = FALSE;
396 char phy80211_path[PATH_MAX];
401 sk = socket(PF_INET, SOCK_DGRAM, 0);
405 memset(&ifr, 0, sizeof(ifr));
406 ifr.ifr_ifindex = index;
408 if (ioctl(sk, SIOCGIFNAME, &ifr) < 0)
411 snprintf(phy80211_path, PATH_MAX,
412 "/sys/class/net/%s/phy80211", ifr.ifr_name);
414 if (stat(phy80211_path, &st) == 0 && (st.st_mode & S_IFDIR))
423 struct connman_device *connman_inet_create_device(int index)
425 enum connman_device_mode mode = CONNMAN_DEVICE_MODE_UNKNOWN;
426 enum connman_device_type type;
427 struct connman_device *device;
428 char *devname, *ident = NULL;
429 char *addr = NULL, *name = NULL, *node = NULL;
434 devname = connman_inet_ifname(index);
438 if (__connman_element_device_isfiltered(devname) == TRUE) {
439 connman_info("Ignoring interface %s (filtered)", devname);
443 type = __connman_rtnl_get_device_type(index);
446 case CONNMAN_DEVICE_TYPE_UNKNOWN:
447 connman_info("Ignoring interface %s (type unknown)", devname);
450 case CONNMAN_DEVICE_TYPE_ETHERNET:
451 case CONNMAN_DEVICE_TYPE_WIFI:
452 case CONNMAN_DEVICE_TYPE_WIMAX:
453 name = index2ident(index, "");
454 addr = index2addr(index);
456 case CONNMAN_DEVICE_TYPE_BLUETOOTH:
457 case CONNMAN_DEVICE_TYPE_CELLULAR:
458 case CONNMAN_DEVICE_TYPE_GPS:
459 case CONNMAN_DEVICE_TYPE_VENDOR:
460 name = strdup(devname);
464 device = connman_device_create(name, type);
469 case CONNMAN_DEVICE_TYPE_UNKNOWN:
470 case CONNMAN_DEVICE_TYPE_VENDOR:
471 case CONNMAN_DEVICE_TYPE_GPS:
472 mode = CONNMAN_DEVICE_MODE_UNKNOWN;
474 case CONNMAN_DEVICE_TYPE_ETHERNET:
475 mode = CONNMAN_DEVICE_MODE_NETWORK_SINGLE;
476 ident = index2ident(index, NULL);
478 case CONNMAN_DEVICE_TYPE_WIFI:
479 case CONNMAN_DEVICE_TYPE_WIMAX:
480 mode = CONNMAN_DEVICE_MODE_NETWORK_SINGLE;
481 ident = index2ident(index, NULL);
483 case CONNMAN_DEVICE_TYPE_BLUETOOTH:
484 mode = CONNMAN_DEVICE_MODE_NETWORK_MULTIPLE;
486 case CONNMAN_DEVICE_TYPE_CELLULAR:
487 mode = CONNMAN_DEVICE_MODE_NETWORK_SINGLE;
488 ident = index2ident(index, NULL);
492 connman_device_set_mode(device, mode);
494 connman_device_set_index(device, index);
495 connman_device_set_interface(device, devname, node);
498 connman_device_set_ident(device, ident);
502 connman_device_set_string(device, "Address", addr);
514 struct in6_addr ifr6_addr;
515 __u32 ifr6_prefixlen;
516 unsigned int ifr6_ifindex;
519 int connman_inet_set_ipv6_address(int index,
520 struct connman_ipaddress *ipaddress)
523 struct in6_ifreq ifr6;
525 DBG("index %d ipaddress->local %s", index, ipaddress->local);
527 if (ipaddress->local == NULL)
530 sk = socket(PF_INET6, SOCK_DGRAM, 0);
536 memset(&ifr6, 0, sizeof(ifr6));
538 err = inet_pton(AF_INET6, ipaddress->local, &ifr6.ifr6_addr);
542 ifr6.ifr6_ifindex = index;
543 ifr6.ifr6_prefixlen = ipaddress->prefixlen;
545 err = ioctl(sk, SIOCSIFADDR, &ifr6);
549 connman_error("Set IPv6 address error");
554 int connman_inet_set_address(int index, struct connman_ipaddress *ipaddress)
556 unsigned char prefix_len;
557 const char *address, *broadcast;
559 if (ipaddress->local == NULL)
562 prefix_len = ipaddress->prefixlen;
563 address = ipaddress->local;
564 broadcast = ipaddress->broadcast;
566 DBG("index %d address %s prefix_len %d", index, address, prefix_len);
568 if ((__connman_inet_modify_address(RTM_NEWADDR,
569 NLM_F_REPLACE | NLM_F_ACK, index, AF_INET,
570 address, prefix_len, broadcast)) < 0) {
571 DBG("address setting failed");
578 int connman_inet_clear_ipv6_address(int index, const char *address,
581 struct in6_ifreq ifr6;
584 DBG("index %d address %s prefix_len %d", index, address, prefix_len);
586 memset(&ifr6, 0, sizeof(ifr6));
588 err = inet_pton(AF_INET6, address, &ifr6.ifr6_addr);
592 ifr6.ifr6_ifindex = index;
593 ifr6.ifr6_prefixlen = prefix_len;
595 sk = socket(PF_INET6, SOCK_DGRAM, 0);
601 err = ioctl(sk, SIOCDIFADDR, &ifr6);
605 connman_error("Clear IPv6 address error");
610 int connman_inet_clear_address(int index, struct connman_ipaddress *ipaddress)
612 unsigned char prefix_len;
613 const char *address, *broadcast;
615 prefix_len = ipaddress->prefixlen;
616 address = ipaddress->local;
617 broadcast = ipaddress->broadcast;
619 DBG("index %d address %s prefix_len %d", index, address, prefix_len);
621 if ((__connman_inet_modify_address(RTM_DELADDR, 0, index, AF_INET,
622 address, prefix_len, broadcast)) < 0) {
623 DBG("address removal failed");
630 int connman_inet_add_host_route(int index, const char *host, const char *gateway)
634 struct sockaddr_in addr;
637 sk = socket(PF_INET, SOCK_DGRAM, 0);
641 memset(&ifr, 0, sizeof(ifr));
642 ifr.ifr_ifindex = index;
644 if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
649 DBG("ifname %s", ifr.ifr_name);
651 memset(&rt, 0, sizeof(rt));
652 rt.rt_flags = RTF_UP | RTF_HOST;
654 rt.rt_flags |= RTF_GATEWAY;
656 memset(&addr, 0, sizeof(addr));
657 addr.sin_family = AF_INET;
658 addr.sin_addr.s_addr = inet_addr(host);
659 memcpy(&rt.rt_dst, &addr, sizeof(rt.rt_dst));
661 memset(&addr, 0, sizeof(addr));
662 addr.sin_family = AF_INET;
664 addr.sin_addr.s_addr = inet_addr(gateway);
666 addr.sin_addr.s_addr = INADDR_ANY;
667 memcpy(&rt.rt_gateway, &addr, sizeof(rt.rt_gateway));
669 memset(&addr, 0, sizeof(addr));
670 addr.sin_family = AF_INET;
671 addr.sin_addr.s_addr = INADDR_ANY;
672 memcpy(&rt.rt_genmask, &addr, sizeof(rt.rt_genmask));
674 rt.rt_dev = ifr.ifr_name;
676 err = ioctl(sk, SIOCADDRT, &rt);
678 connman_error("Adding host route failed (%s)",
686 int connman_inet_del_host_route(int index, const char *host)
690 struct sockaddr_in addr;
693 sk = socket(PF_INET, SOCK_DGRAM, 0);
697 memset(&ifr, 0, sizeof(ifr));
698 ifr.ifr_ifindex = index;
700 if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
705 DBG("ifname %s", ifr.ifr_name);
707 memset(&rt, 0, sizeof(rt));
708 rt.rt_flags = RTF_UP | RTF_HOST;
710 memset(&addr, 0, sizeof(addr));
711 addr.sin_family = AF_INET;
712 addr.sin_addr.s_addr = inet_addr(host);
713 memcpy(&rt.rt_dst, &addr, sizeof(rt.rt_dst));
715 rt.rt_dev = ifr.ifr_name;
717 err = ioctl(sk, SIOCDELRT, &rt);
719 connman_error("Deleting host route failed (%s)",
727 int connman_inet_del_ipv6_host_route(int index, const char *host)
732 DBG("index %d host %s", index, host);
737 memset(&rt, 0, sizeof(rt));
739 rt.rtmsg_dst_len = 128;
741 err = inet_pton(AF_INET6, host, &rt.rtmsg_dst);
745 rt.rtmsg_flags = RTF_UP | RTF_HOST;
748 rt.rtmsg_ifindex = index;
750 sk = socket(AF_INET6, SOCK_DGRAM, 0);
756 err = ioctl(sk, SIOCDELRT, &rt);
760 connman_error("Del IPv6 host route error");
765 int connman_inet_add_ipv6_host_route(int index, const char *host,
771 DBG("index %d host %s gateway %s", index, host, gateway);
776 memset(&rt, 0, sizeof(rt));
778 rt.rtmsg_dst_len = 128;
780 err = inet_pton(AF_INET6, host, &rt.rtmsg_dst);
784 rt.rtmsg_flags = RTF_UP | RTF_HOST;
786 if (gateway != NULL) {
787 rt.rtmsg_flags |= RTF_GATEWAY;
788 inet_pton(AF_INET6, gateway, &rt.rtmsg_gateway);
792 rt.rtmsg_ifindex = index;
794 sk = socket(AF_INET6, SOCK_DGRAM, 0);
800 err = ioctl(sk, SIOCADDRT, &rt);
804 connman_error("Set IPv6 host route error");
809 int connman_inet_set_ipv6_gateway_address(int index, const char *gateway)
814 DBG("index %d, gateway %s", index, gateway);
819 memset(&rt, 0, sizeof(rt));
821 err = inet_pton(AF_INET6, gateway, &rt.rtmsg_gateway);
825 rt.rtmsg_flags = RTF_UP | RTF_GATEWAY;
827 rt.rtmsg_dst_len = 0;
828 rt.rtmsg_ifindex = index;
830 sk = socket(AF_INET6, SOCK_DGRAM, 0);
836 err = ioctl(sk, SIOCADDRT, &rt);
840 connman_error("Set default IPv6 gateway error");
845 int connman_inet_clear_ipv6_gateway_address(int index, const char *gateway)
850 DBG("index %d, gateway %s", index, gateway);
855 memset(&rt, 0, sizeof(rt));
857 err = inet_pton(AF_INET6, gateway, &rt.rtmsg_gateway);
861 rt.rtmsg_flags = RTF_UP | RTF_GATEWAY;
863 rt.rtmsg_dst_len = 0;
864 rt.rtmsg_ifindex = index;
866 sk = socket(AF_INET6, SOCK_DGRAM, 0);
872 err = ioctl(sk, SIOCDELRT, &rt);
876 connman_error("Clear default IPv6 gateway error");
881 int connman_inet_set_gateway_address(int index, const char *gateway)
885 struct sockaddr_in addr;
888 sk = socket(PF_INET, SOCK_DGRAM, 0);
892 memset(&ifr, 0, sizeof(ifr));
893 ifr.ifr_ifindex = index;
895 if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
900 DBG("ifname %s", ifr.ifr_name);
902 memset(&rt, 0, sizeof(rt));
903 rt.rt_flags = RTF_UP | RTF_GATEWAY;
905 memset(&addr, 0, sizeof(addr));
906 addr.sin_family = AF_INET;
907 addr.sin_addr.s_addr = INADDR_ANY;
908 memcpy(&rt.rt_dst, &addr, sizeof(rt.rt_dst));
910 memset(&addr, 0, sizeof(addr));
911 addr.sin_family = AF_INET;
912 addr.sin_addr.s_addr = inet_addr(gateway);
913 memcpy(&rt.rt_gateway, &addr, sizeof(rt.rt_gateway));
915 memset(&addr, 0, sizeof(addr));
916 addr.sin_family = AF_INET;
917 addr.sin_addr.s_addr = INADDR_ANY;
918 memcpy(&rt.rt_genmask, &addr, sizeof(rt.rt_genmask));
920 err = ioctl(sk, SIOCADDRT, &rt);
922 connman_error("Setting default gateway route failed (%s)",
930 int connman_inet_set_gateway_interface(int index)
934 struct sockaddr_in addr;
939 sk = socket(PF_INET, SOCK_DGRAM, 0);
943 memset(&ifr, 0, sizeof(ifr));
944 ifr.ifr_ifindex = index;
946 if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
951 DBG("ifname %s", ifr.ifr_name);
953 memset(&rt, 0, sizeof(rt));
954 rt.rt_flags = RTF_UP;
956 memset(&addr, 0, sizeof(addr));
957 addr.sin_family = AF_INET;
958 addr.sin_addr.s_addr = INADDR_ANY;
960 memcpy(&rt.rt_genmask, &addr, sizeof(rt.rt_genmask));
961 memcpy(&rt.rt_dst, &addr, sizeof(rt.rt_dst));
962 memcpy(&rt.rt_gateway, &addr, sizeof(rt.rt_gateway));
964 rt.rt_dev = ifr.ifr_name;
966 err = ioctl(sk, SIOCADDRT, &rt);
968 connman_error("Setting default interface route failed (%s)",
975 int connman_inet_clear_gateway_address(int index, const char *gateway)
979 struct sockaddr_in addr;
984 sk = socket(PF_INET, SOCK_DGRAM, 0);
988 memset(&ifr, 0, sizeof(ifr));
989 ifr.ifr_ifindex = index;
991 if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
996 DBG("ifname %s", ifr.ifr_name);
998 memset(&rt, 0, sizeof(rt));
999 rt.rt_flags = RTF_UP | RTF_GATEWAY;
1001 memset(&addr, 0, sizeof(addr));
1002 addr.sin_family = AF_INET;
1003 addr.sin_addr.s_addr = INADDR_ANY;
1004 memcpy(&rt.rt_dst, &addr, sizeof(rt.rt_dst));
1006 memset(&addr, 0, sizeof(addr));
1007 addr.sin_family = AF_INET;
1008 addr.sin_addr.s_addr = inet_addr(gateway);
1009 memcpy(&rt.rt_gateway, &addr, sizeof(rt.rt_gateway));
1011 memset(&addr, 0, sizeof(addr));
1012 addr.sin_family = AF_INET;
1013 addr.sin_addr.s_addr = INADDR_ANY;
1014 memcpy(&rt.rt_genmask, &addr, sizeof(rt.rt_genmask));
1016 err = ioctl(sk, SIOCDELRT, &rt);
1018 connman_error("Removing default gateway route failed (%s)",
1026 int connman_inet_clear_gateway_interface(int index)
1030 struct sockaddr_in addr;
1035 sk = socket(PF_INET, SOCK_DGRAM, 0);
1039 memset(&ifr, 0, sizeof(ifr));
1040 ifr.ifr_ifindex = index;
1042 if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
1047 DBG("ifname %s", ifr.ifr_name);
1049 memset(&rt, 0, sizeof(rt));
1050 rt.rt_flags = RTF_UP;
1052 memset(&addr, 0, sizeof(addr));
1053 addr.sin_family = AF_INET;
1054 addr.sin_addr.s_addr = INADDR_ANY;
1056 memcpy(&rt.rt_genmask, &addr, sizeof(rt.rt_genmask));
1057 memcpy(&rt.rt_dst, &addr, sizeof(rt.rt_dst));
1058 memcpy(&rt.rt_gateway, &addr, sizeof(rt.rt_gateway));
1060 rt.rt_dev = ifr.ifr_name;
1062 err = ioctl(sk, SIOCDELRT, &rt);
1064 connman_error("Removing default interface route failed (%s)",
1071 connman_bool_t connman_inet_compare_subnet(int index, const char *host)
1074 struct in_addr _host_addr;
1075 in_addr_t host_addr, netmask_addr, if_addr;
1076 struct sockaddr_in *netmask, *addr;
1079 DBG("host %s", host);
1084 if (inet_aton(host, &_host_addr) == 0)
1086 host_addr = _host_addr.s_addr;
1088 sk = socket(PF_INET, SOCK_DGRAM, 0);
1092 memset(&ifr, 0, sizeof(ifr));
1093 ifr.ifr_ifindex = index;
1095 if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
1100 if (ioctl(sk, SIOCGIFNETMASK, &ifr) < 0) {
1105 netmask = (struct sockaddr_in *)&ifr.ifr_netmask;
1106 netmask_addr = netmask->sin_addr.s_addr;
1108 if (ioctl(sk, SIOCGIFADDR, &ifr) < 0) {
1112 addr = (struct sockaddr_in *)&ifr.ifr_addr;
1113 if_addr = addr->sin_addr.s_addr;
1115 return ((if_addr & netmask_addr) == (host_addr & netmask_addr));