| /* |
| * Copyright 2008, The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <arpa/inet.h> |
| #include <errno.h> |
| #include <linux/if.h> |
| #include <linux/if_ether.h> |
| #include <linux/if_arp.h> |
| #include <linux/netlink.h> |
| #include <linux/route.h> |
| #include <linux/ipv6_route.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/sockios.h> |
| #include <net/if.h> |
| #include <netdb.h> |
| #include <netinet/in.h> |
| #include <pthread.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/select.h> |
| #include <sys/socket.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #ifdef ANDROID |
| #define LOG_TAG "NetUtils" |
| #include <cutils/properties.h> |
| #include <log/log.h> |
| #else |
| #define ALOGD printf |
| #define ALOGW printf |
| #endif |
| |
| #include "netutils/ifc.h" |
| |
| #if defined(__ANDROID__) |
| /* SIOCKILLADDR is an Android extension. */ |
| #define SIOCKILLADDR 0x8939 |
| #endif |
| |
| static int ifc_ctl_sock = -1; |
| static int ifc_ctl_sock6 = -1; |
| static pthread_mutex_t ifc_sock_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP; |
| static pthread_mutex_t ifc_sock6_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP; |
| void printerr(char *fmt, ...); |
| |
| #define DBG 0 |
| #define INET_ADDRLEN 4 |
| #define INET6_ADDRLEN 16 |
| |
| in_addr_t prefixLengthToIpv4Netmask(int prefix_length) |
| { |
| in_addr_t mask = 0; |
| |
| // C99 (6.5.7): shifts of 32 bits have undefined results |
| if (prefix_length <= 0 || prefix_length > 32) { |
| return 0; |
| } |
| |
| mask = ~mask << (32 - prefix_length); |
| mask = htonl(mask); |
| |
| return mask; |
| } |
| |
| int ipv4NetmaskToPrefixLength(in_addr_t mask) |
| { |
| int prefixLength = 0; |
| uint32_t m = (uint32_t)ntohl(mask); |
| while (m & 0x80000000) { |
| prefixLength++; |
| m = m << 1; |
| } |
| return prefixLength; |
| } |
| |
| static const char *ipaddr_to_string(in_addr_t addr) |
| { |
| struct in_addr in_addr; |
| |
| in_addr.s_addr = addr; |
| return inet_ntoa(in_addr); |
| } |
| |
| int string_to_ip(const char *string, struct sockaddr_storage *ss) { |
| struct addrinfo hints, *ai; |
| int ret; |
| |
| if (ss == NULL) { |
| return -EFAULT; |
| } |
| |
| memset(&hints, 0, sizeof(hints)); |
| hints.ai_family = AF_UNSPEC; |
| hints.ai_flags = AI_NUMERICHOST; |
| hints.ai_socktype = SOCK_DGRAM; |
| |
| ret = getaddrinfo(string, NULL, &hints, &ai); |
| if (ret == 0) { |
| memcpy(ss, ai->ai_addr, ai->ai_addrlen); |
| freeaddrinfo(ai); |
| } else { |
| // Getaddrinfo has its own error codes. Convert to negative errno. |
| // There, the only thing that can reasonably happen is that the passed-in string is invalid. |
| ret = (ret == EAI_SYSTEM) ? -errno : -EINVAL; |
| } |
| |
| return ret; |
| } |
| |
| int ifc_init(void) |
| { |
| int ret; |
| |
| pthread_mutex_lock(&ifc_sock_mutex); |
| if (ifc_ctl_sock == -1) { |
| ifc_ctl_sock = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0); |
| if (ifc_ctl_sock < 0) { |
| printerr("socket() failed: %s\n", strerror(errno)); |
| } |
| } |
| |
| ret = ifc_ctl_sock < 0 ? -1 : 0; |
| if (DBG) printerr("ifc_init_returning %d", ret); |
| return ret; |
| } |
| |
| int ifc_init6(void) |
| { |
| pthread_mutex_lock(&ifc_sock6_mutex); |
| if (ifc_ctl_sock6 == -1) { |
| ifc_ctl_sock6 = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, 0); |
| if (ifc_ctl_sock6 < 0) { |
| printerr("socket() failed: %s\n", strerror(errno)); |
| } |
| } |
| return ifc_ctl_sock6 < 0 ? -1 : 0; |
| } |
| |
| void ifc_close(void) |
| { |
| if (DBG) printerr("ifc_close"); |
| if (ifc_ctl_sock != -1) { |
| (void)close(ifc_ctl_sock); |
| ifc_ctl_sock = -1; |
| } |
| pthread_mutex_unlock(&ifc_sock_mutex); |
| } |
| |
| void ifc_close6(void) |
| { |
| if (ifc_ctl_sock6 != -1) { |
| (void)close(ifc_ctl_sock6); |
| ifc_ctl_sock6 = -1; |
| } |
| pthread_mutex_unlock(&ifc_sock6_mutex); |
| } |
| |
| static void ifc_init_ifr(const char *name, struct ifreq *ifr) |
| { |
| memset(ifr, 0, sizeof(struct ifreq)); |
| strncpy(ifr->ifr_name, name, IFNAMSIZ); |
| ifr->ifr_name[IFNAMSIZ - 1] = 0; |
| } |
| |
| int ifc_get_hwaddr(const char *name, void *ptr) |
| { |
| int r; |
| struct ifreq ifr; |
| ifc_init_ifr(name, &ifr); |
| |
| r = ioctl(ifc_ctl_sock, SIOCGIFHWADDR, &ifr); |
| if(r < 0) return -1; |
| |
| memcpy(ptr, &ifr.ifr_hwaddr.sa_data, ETH_ALEN); |
| return 0; |
| } |
| |
| int ifc_get_ifindex(const char *name, int *if_indexp) |
| { |
| int r; |
| struct ifreq ifr; |
| ifc_init_ifr(name, &ifr); |
| |
| r = ioctl(ifc_ctl_sock, SIOCGIFINDEX, &ifr); |
| if(r < 0) return -1; |
| |
| *if_indexp = ifr.ifr_ifindex; |
| return 0; |
| } |
| |
| static int ifc_set_flags(const char *name, unsigned set, unsigned clr) |
| { |
| struct ifreq ifr; |
| ifc_init_ifr(name, &ifr); |
| |
| if(ioctl(ifc_ctl_sock, SIOCGIFFLAGS, &ifr) < 0) return -1; |
| ifr.ifr_flags = (ifr.ifr_flags & (~clr)) | set; |
| return ioctl(ifc_ctl_sock, SIOCSIFFLAGS, &ifr); |
| } |
| |
| int ifc_up(const char *name) |
| { |
| int ret = ifc_set_flags(name, IFF_UP, 0); |
| if (DBG) printerr("ifc_up(%s) = %d", name, ret); |
| return ret; |
| } |
| |
| int ifc_down(const char *name) |
| { |
| int ret = ifc_set_flags(name, 0, IFF_UP); |
| if (DBG) printerr("ifc_down(%s) = %d", name, ret); |
| return ret; |
| } |
| |
| static void init_sockaddr_in(struct sockaddr *sa, in_addr_t addr) |
| { |
| struct sockaddr_in *sin = (struct sockaddr_in *) sa; |
| sin->sin_family = AF_INET; |
| sin->sin_port = 0; |
| sin->sin_addr.s_addr = addr; |
| } |
| |
| int ifc_set_addr(const char *name, in_addr_t addr) |
| { |
| struct ifreq ifr; |
| int ret; |
| |
| ifc_init_ifr(name, &ifr); |
| init_sockaddr_in(&ifr.ifr_addr, addr); |
| |
| ret = ioctl(ifc_ctl_sock, SIOCSIFADDR, &ifr); |
| if (DBG) printerr("ifc_set_addr(%s, xx) = %d", name, ret); |
| return ret; |
| } |
| |
| /* |
| * Adds or deletes an IP address on an interface. |
| * |
| * Action is one of: |
| * - RTM_NEWADDR (to add a new address) |
| * - RTM_DELADDR (to delete an existing address) |
| * |
| * Returns zero on success and negative errno on failure. |
| */ |
| int ifc_act_on_address(int action, const char* name, const char* address, int prefixlen, |
| bool nodad) { |
| int ifindex, s, len, ret; |
| struct sockaddr_storage ss; |
| int saved_errno; |
| void *addr; |
| size_t addrlen; |
| struct { |
| struct nlmsghdr n; |
| struct ifaddrmsg r; |
| // Allow for IPv4 or IPv6 address, headers, IPv4 broadcast address and padding. |
| char attrbuf[NLMSG_ALIGN(sizeof(struct rtattr)) + NLMSG_ALIGN(INET6_ADDRLEN) + |
| NLMSG_ALIGN(sizeof(struct rtattr)) + NLMSG_ALIGN(INET_ADDRLEN)]; |
| } req; |
| struct rtattr *rta; |
| struct nlmsghdr *nh; |
| struct nlmsgerr *err; |
| |
| // Get interface ID. |
| ifindex = if_nametoindex(name); |
| if (ifindex == 0) { |
| return -errno; |
| } |
| |
| // Convert string representation to sockaddr_storage. |
| ret = string_to_ip(address, &ss); |
| if (ret) { |
| return ret; |
| } |
| |
| // Determine address type and length. |
| if (ss.ss_family == AF_INET) { |
| struct sockaddr_in *sin = (struct sockaddr_in *) &ss; |
| addr = &sin->sin_addr; |
| addrlen = INET_ADDRLEN; |
| } else if (ss.ss_family == AF_INET6) { |
| struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) &ss; |
| addr = &sin6->sin6_addr; |
| addrlen = INET6_ADDRLEN; |
| } else { |
| return -EAFNOSUPPORT; |
| } |
| |
| // Fill in netlink structures. |
| memset(&req, 0, sizeof(req)); |
| |
| // Netlink message header. |
| req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.r)); |
| req.n.nlmsg_type = action; |
| req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; |
| req.n.nlmsg_pid = getpid(); |
| |
| // Interface address message header. |
| req.r.ifa_family = ss.ss_family; |
| req.r.ifa_flags = nodad ? IFA_F_NODAD : 0; |
| req.r.ifa_prefixlen = prefixlen; |
| req.r.ifa_index = ifindex; |
| |
| // Routing attribute. Contains the actual IP address. |
| rta = (struct rtattr *) (((char *) &req) + NLMSG_ALIGN(req.n.nlmsg_len)); |
| rta->rta_type = IFA_LOCAL; |
| rta->rta_len = RTA_LENGTH(addrlen); |
| req.n.nlmsg_len = NLMSG_ALIGN(req.n.nlmsg_len) + RTA_LENGTH(addrlen); |
| memcpy(RTA_DATA(rta), addr, addrlen); |
| |
| // Add an explicit IFA_BROADCAST for IPv4 RTM_NEWADDRs. |
| if (ss.ss_family == AF_INET && action == RTM_NEWADDR) { |
| rta = (struct rtattr *) (((char *) &req) + NLMSG_ALIGN(req.n.nlmsg_len)); |
| rta->rta_type = IFA_BROADCAST; |
| rta->rta_len = RTA_LENGTH(addrlen); |
| req.n.nlmsg_len = NLMSG_ALIGN(req.n.nlmsg_len) + RTA_LENGTH(addrlen); |
| ((struct in_addr *)addr)->s_addr |= htonl((1<<(32-prefixlen))-1); |
| memcpy(RTA_DATA(rta), addr, addrlen); |
| } |
| |
| s = socket(PF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE); |
| if (s < 0) { |
| return -errno; |
| } |
| |
| if (send(s, &req, req.n.nlmsg_len, 0) < 0) { |
| saved_errno = errno; |
| close(s); |
| return -saved_errno; |
| } |
| |
| char buf[NLMSG_ALIGN(sizeof(struct nlmsgerr)) + sizeof(req)]; |
| len = recv(s, buf, sizeof(buf), 0); |
| saved_errno = errno; |
| close(s); |
| if (len < 0) { |
| return -saved_errno; |
| } |
| |
| // Parse the acknowledgement to find the return code. |
| nh = (struct nlmsghdr *) buf; |
| if (!NLMSG_OK(nh, (unsigned) len) || nh->nlmsg_type != NLMSG_ERROR) { |
| return -EINVAL; |
| } |
| err = NLMSG_DATA(nh); |
| |
| // Return code is negative errno. |
| return err->error; |
| } |
| |
| // Returns zero on success and negative errno on failure. |
| int ifc_add_address(const char *name, const char *address, int prefixlen) { |
| return ifc_act_on_address(RTM_NEWADDR, name, address, prefixlen, /*nodad*/ false); |
| } |
| |
| // Returns zero on success and negative errno on failure. |
| int ifc_del_address(const char *name, const char * address, int prefixlen) { |
| return ifc_act_on_address(RTM_DELADDR, name, address, prefixlen, /*nodad*/ false); |
| } |
| |
| /* |
| * Clears IPv6 addresses on the specified interface. |
| */ |
| int ifc_clear_ipv6_addresses(const char *name) { |
| char rawaddrstr[INET6_ADDRSTRLEN], addrstr[INET6_ADDRSTRLEN]; |
| unsigned int prefixlen; |
| int lasterror = 0, i, j, ret; |
| char ifname[64]; // Currently, IFNAMSIZ = 16. |
| FILE *f = fopen("/proc/net/if_inet6", "r"); |
| if (!f) { |
| return -errno; |
| } |
| |
| // Format: |
| // 20010db8000a0001fc446aa4b5b347ed 03 40 00 01 wlan0 |
| while (fscanf(f, "%32s %*02x %02x %*02x %*02x %63s\n", |
| rawaddrstr, &prefixlen, ifname) == 3) { |
| // Is this the interface we're looking for? |
| if (strcmp(name, ifname)) { |
| continue; |
| } |
| |
| // Put the colons back into the address. |
| for (i = 0, j = 0; i < 32; i++, j++) { |
| addrstr[j] = rawaddrstr[i]; |
| if (i % 4 == 3) { |
| addrstr[++j] = ':'; |
| } |
| } |
| addrstr[j - 1] = '\0'; |
| |
| // Don't delete the link-local address as well, or it will disable IPv6 |
| // on the interface. |
| if (strncmp(addrstr, "fe80:", 5) == 0) { |
| continue; |
| } |
| |
| ret = ifc_del_address(ifname, addrstr, prefixlen); |
| if (ret) { |
| ALOGE("Deleting address %s/%d on %s: %s", addrstr, prefixlen, ifname, |
| strerror(-ret)); |
| lasterror = ret; |
| } |
| } |
| |
| fclose(f); |
| return lasterror; |
| } |
| |
| /* |
| * Clears IPv4 addresses on the specified interface. |
| */ |
| void ifc_clear_ipv4_addresses(const char *name) { |
| unsigned count, addr; |
| ifc_init(); |
| for (count=0, addr=1;((addr != 0) && (count < 255)); count++) { |
| if (ifc_get_addr(name, &addr) < 0) |
| break; |
| if (addr) |
| ifc_set_addr(name, 0); |
| } |
| ifc_close(); |
| } |
| |
| /* |
| * Clears all IP addresses on the specified interface. |
| */ |
| int ifc_clear_addresses(const char *name) { |
| ifc_clear_ipv4_addresses(name); |
| return ifc_clear_ipv6_addresses(name); |
| } |
| |
| int ifc_set_hwaddr(const char *name, const void *ptr) |
| { |
| struct ifreq ifr; |
| ifc_init_ifr(name, &ifr); |
| |
| ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER; |
| memcpy(&ifr.ifr_hwaddr.sa_data, ptr, ETH_ALEN); |
| return ioctl(ifc_ctl_sock, SIOCSIFHWADDR, &ifr); |
| } |
| |
| int ifc_set_mask(const char *name, in_addr_t mask) |
| { |
| struct ifreq ifr; |
| int ret; |
| |
| ifc_init_ifr(name, &ifr); |
| init_sockaddr_in(&ifr.ifr_addr, mask); |
| |
| ret = ioctl(ifc_ctl_sock, SIOCSIFNETMASK, &ifr); |
| if (DBG) printerr("ifc_set_mask(%s, xx) = %d", name, ret); |
| return ret; |
| } |
| |
| int ifc_set_prefixLength(const char *name, int prefixLength) |
| { |
| struct ifreq ifr; |
| // TODO - support ipv6 |
| if (prefixLength > 32 || prefixLength < 0) return -1; |
| |
| in_addr_t mask = prefixLengthToIpv4Netmask(prefixLength); |
| ifc_init_ifr(name, &ifr); |
| init_sockaddr_in(&ifr.ifr_addr, mask); |
| |
| return ioctl(ifc_ctl_sock, SIOCSIFNETMASK, &ifr); |
| } |
| |
| int ifc_get_addr(const char *name, in_addr_t *addr) |
| { |
| struct ifreq ifr; |
| int ret = 0; |
| |
| ifc_init_ifr(name, &ifr); |
| if (addr != NULL) { |
| ret = ioctl(ifc_ctl_sock, SIOCGIFADDR, &ifr); |
| if (ret < 0) { |
| *addr = 0; |
| } else { |
| *addr = ((struct sockaddr_in*) &ifr.ifr_addr)->sin_addr.s_addr; |
| } |
| } |
| return ret; |
| } |
| |
| int ifc_get_info(const char *name, in_addr_t *addr, int *prefixLength, unsigned *flags) |
| { |
| struct ifreq ifr; |
| ifc_init_ifr(name, &ifr); |
| |
| if (addr != NULL) { |
| if(ioctl(ifc_ctl_sock, SIOCGIFADDR, &ifr) < 0) { |
| *addr = 0; |
| } else { |
| *addr = ((struct sockaddr_in*) &ifr.ifr_addr)->sin_addr.s_addr; |
| } |
| } |
| |
| if (prefixLength != NULL) { |
| if(ioctl(ifc_ctl_sock, SIOCGIFNETMASK, &ifr) < 0) { |
| *prefixLength = 0; |
| } else { |
| *prefixLength = ipv4NetmaskToPrefixLength( |
| ((struct sockaddr_in*) &ifr.ifr_addr)->sin_addr.s_addr); |
| } |
| } |
| |
| if (flags != NULL) { |
| if(ioctl(ifc_ctl_sock, SIOCGIFFLAGS, &ifr) < 0) { |
| *flags = 0; |
| } else { |
| *flags = ifr.ifr_flags; |
| } |
| } |
| |
| return 0; |
| } |
| |
| int ifc_act_on_ipv4_route(int action, const char *ifname, struct in_addr dst, int prefix_length, |
| struct in_addr gw) |
| { |
| struct rtentry rt; |
| int result; |
| in_addr_t netmask; |
| |
| memset(&rt, 0, sizeof(rt)); |
| |
| rt.rt_dst.sa_family = AF_INET; |
| rt.rt_dev = (void*) ifname; |
| |
| netmask = prefixLengthToIpv4Netmask(prefix_length); |
| init_sockaddr_in(&rt.rt_genmask, netmask); |
| init_sockaddr_in(&rt.rt_dst, dst.s_addr); |
| rt.rt_flags = RTF_UP; |
| |
| if (prefix_length == 32) { |
| rt.rt_flags |= RTF_HOST; |
| } |
| |
| if (gw.s_addr != 0) { |
| rt.rt_flags |= RTF_GATEWAY; |
| init_sockaddr_in(&rt.rt_gateway, gw.s_addr); |
| } |
| |
| ifc_init(); |
| |
| if (ifc_ctl_sock < 0) { |
| ifc_close(); |
| return -errno; |
| } |
| |
| result = ioctl(ifc_ctl_sock, action, &rt); |
| if (result < 0) { |
| if (errno == EEXIST) { |
| result = 0; |
| } else { |
| result = -errno; |
| } |
| } |
| ifc_close(); |
| return result; |
| } |
| |
| /* deprecated - v4 only */ |
| int ifc_create_default_route(const char *name, in_addr_t gw) |
| { |
| struct in_addr in_dst, in_gw; |
| |
| in_dst.s_addr = 0; |
| in_gw.s_addr = gw; |
| |
| int ret = ifc_act_on_ipv4_route(SIOCADDRT, name, in_dst, 0, in_gw); |
| if (DBG) printerr("ifc_create_default_route(%s, %d) = %d", name, gw, ret); |
| return ret; |
| } |
| |
| // Needed by code in hidden partner repositories / branches, so don't delete. |
| int ifc_enable(const char *ifname) |
| { |
| int result; |
| |
| ifc_init(); |
| result = ifc_up(ifname); |
| ifc_close(); |
| return result; |
| } |
| |
| // Needed by code in hidden partner repositories / branches, so don't delete. |
| int ifc_disable(const char *ifname) |
| { |
| unsigned addr, count; |
| int result; |
| |
| ifc_init(); |
| result = ifc_down(ifname); |
| |
| ifc_set_addr(ifname, 0); |
| for (count=0, addr=1;((addr != 0) && (count < 255)); count++) { |
| if (ifc_get_addr(ifname, &addr) < 0) |
| break; |
| if (addr) |
| ifc_set_addr(ifname, 0); |
| } |
| |
| ifc_close(); |
| return result; |
| } |
| |
| int ifc_reset_connections(const char *ifname, const int reset_mask) |
| { |
| #if defined(__ANDROID__) |
| int result, success; |
| in_addr_t myaddr = 0; |
| struct ifreq ifr; |
| struct in6_ifreq ifr6; |
| |
| if (reset_mask & RESET_IPV4_ADDRESSES) { |
| /* IPv4. Clear connections on the IP address. */ |
| ifc_init(); |
| if (!(reset_mask & RESET_IGNORE_INTERFACE_ADDRESS)) { |
| ifc_get_info(ifname, &myaddr, NULL, NULL); |
| } |
| ifc_init_ifr(ifname, &ifr); |
| init_sockaddr_in(&ifr.ifr_addr, myaddr); |
| result = ioctl(ifc_ctl_sock, SIOCKILLADDR, &ifr); |
| ifc_close(); |
| } else { |
| result = 0; |
| } |
| |
| if (reset_mask & RESET_IPV6_ADDRESSES) { |
| /* |
| * IPv6. On Linux, when an interface goes down it loses all its IPv6 |
| * addresses, so we don't know which connections belonged to that interface |
| * So we clear all unused IPv6 connections on the device by specifying an |
| * empty IPv6 address. |
| */ |
| ifc_init6(); |
| // This implicitly specifies an address of ::, i.e., kill all IPv6 sockets. |
| memset(&ifr6, 0, sizeof(ifr6)); |
| success = ioctl(ifc_ctl_sock6, SIOCKILLADDR, &ifr6); |
| if (result == 0) { |
| result = success; |
| } |
| ifc_close6(); |
| } |
| |
| return result; |
| #else |
| return 0; |
| #endif |
| } |
| |
| /* |
| * Removes the default route for the named interface. |
| */ |
| int ifc_remove_default_route(const char *ifname) |
| { |
| struct rtentry rt; |
| int result; |
| |
| ifc_init(); |
| memset(&rt, 0, sizeof(rt)); |
| rt.rt_dev = (void *)ifname; |
| rt.rt_flags = RTF_UP|RTF_GATEWAY; |
| init_sockaddr_in(&rt.rt_dst, 0); |
| if ((result = ioctl(ifc_ctl_sock, SIOCDELRT, &rt)) < 0) { |
| ALOGD("failed to remove default route for %s: %s", ifname, strerror(errno)); |
| } |
| ifc_close(); |
| return result; |
| } |
| |
| int |
| ifc_configure(const char *ifname, |
| in_addr_t address, |
| uint32_t prefixLength, |
| in_addr_t gateway, |
| in_addr_t dns1, |
| in_addr_t dns2) { |
| |
| char dns_prop_name[PROPERTY_KEY_MAX]; |
| |
| ifc_init(); |
| |
| if (ifc_up(ifname)) { |
| printerr("failed to turn on interface %s: %s\n", ifname, strerror(errno)); |
| ifc_close(); |
| return -1; |
| } |
| if (ifc_set_addr(ifname, address)) { |
| printerr("failed to set ipaddr %s: %s\n", ipaddr_to_string(address), strerror(errno)); |
| ifc_close(); |
| return -1; |
| } |
| if (ifc_set_prefixLength(ifname, prefixLength)) { |
| printerr("failed to set prefixLength %d: %s\n", prefixLength, strerror(errno)); |
| ifc_close(); |
| return -1; |
| } |
| if (ifc_create_default_route(ifname, gateway)) { |
| printerr("failed to set default route %s: %s\n", ipaddr_to_string(gateway), strerror(errno)); |
| ifc_close(); |
| return -1; |
| } |
| |
| ifc_close(); |
| |
| snprintf(dns_prop_name, sizeof(dns_prop_name), "net.%s.dns1", ifname); |
| property_set(dns_prop_name, dns1 ? ipaddr_to_string(dns1) : ""); |
| snprintf(dns_prop_name, sizeof(dns_prop_name), "net.%s.dns2", ifname); |
| property_set(dns_prop_name, dns2 ? ipaddr_to_string(dns2) : ""); |
| |
| return 0; |
| } |