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