/* * Copyright (c) 2009, The Android Open Source Project * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name of Google, Inc. nor the names of its contributors * may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include static inline int set_address(const char *address, struct sockaddr *sa) { return inet_aton(address, &((struct sockaddr_in *)sa)->sin_addr); } /* current support the following routing entries */ /* route add default dev wlan0 */ /* route add default gw 192.168.1.1 dev wlan0 */ /* route add -net 192.168.1.2 netmask 255.255.255.0 gw 192.168.1.1 */ int route_main(int argc, char *argv[]) { struct rtentry rt = { .rt_dst = {.sa_family = AF_INET}, .rt_genmask = {.sa_family = AF_INET}, .rt_gateway = {.sa_family = AF_INET}, }; errno = EINVAL; if (argc > 2 && !strcmp(argv[1], "add")) { if (!strcmp(argv[2], "default")) { /* route add default dev wlan0 */ if (argc > 4 && !strcmp(argv[3], "dev")) { rt.rt_flags = RTF_UP; rt.rt_dev = argv[4]; errno = 0; goto apply; } /* route add default gw 192.168.1.1 dev wlan0 */ if (argc > 6 && !strcmp(argv[3], "gw") && !strcmp(argv[5], "dev")) { rt.rt_flags = RTF_UP | RTF_GATEWAY; rt.rt_dev = argv[6]; if (set_address(argv[4], &rt.rt_gateway)) { errno = 0; } goto apply; } } /* route add -net 192.168.1.2 netmask 255.255.255.0 gw 192.168.1.1 */ if (argc > 7 && !strcmp(argv[2], "-net") && !strcmp(argv[4], "netmask")) { if (!strcmp(argv[6], "gw")) { rt.rt_flags = RTF_UP | RTF_GATEWAY; if (set_address(argv[3], &rt.rt_dst) && set_address(argv[5], &rt.rt_genmask) && set_address(argv[7], &rt.rt_gateway)) { errno = 0; } goto apply; } else if (!strcmp(argv[6], "dev")) { rt.rt_flags = RTF_UP; rt.rt_dev = argv[7]; if (set_address(argv[3], &rt.rt_dst) && set_address(argv[5], &rt.rt_genmask)) { errno = 0; } goto apply; } } } apply: if (!errno) { int s = socket(AF_INET, SOCK_DGRAM, 0); if (s != -1 && (ioctl(s, SIOCADDRT, &rt) != -1 || errno == EEXIST)) { return 0; } } puts(strerror(errno)); return errno; }