toolbox: Revise route utility.
Add copyright header.
Returns errno when something goes wrong. Otherwise returns 0.
When the route entry exists, treat it as a success.
diff --git a/toolbox/route.c b/toolbox/route.c
index 2fd7108..4f66201 100644
--- a/toolbox/route.c
+++ b/toolbox/route.c
@@ -1,130 +1,103 @@
+/*
+ * 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 <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <stdarg.h>
-
-#include <errno.h>
#include <string.h>
-#include <ctype.h>
-
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
-#include <linux/if.h>
-#include <linux/sockios.h>
#include <arpa/inet.h>
#include <linux/route.h>
-static void die(const char *fmt, ...)
-{
- va_list p;
-
- va_start(p, fmt);
- fprintf(stderr,"error(%s): ", strerror(errno));
- fprintf(stderr, fmt, p);
- va_end(p);
- exit(-1);
+static inline int set_address(const char *address, struct sockaddr *sa) {
+ return inet_aton(address, &((struct sockaddr_in *)sa)->sin_addr);
}
-static inline void init_sockaddr_in(struct sockaddr_in *sin, const char *addr)
-{
- sin->sin_family = AF_INET;
- sin->sin_port = 0;
- sin->sin_addr.s_addr = inet_addr(addr);
-}
-
-#define ADVANCE(argc, argv) do { argc--, argv++; } while(0)
-#define EXPECT_NEXT(argc, argv) do { \
- ADVANCE(argc, argv); \
- if (0 == argc) { \
- errno = EINVAL; \
- die("expecting one more argument"); \
- } \
-} while(0)
-
/* current support the following routing entries */
/* route add default dev wlan0 */
-/* route add default gw 192.168.20.1 dev wlan0 */
-/* route add net 192.168.1.1 netmask 255.255.255.0 gw 172.24.192.10 */
+/* 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 ifreq ifr;
- int s,i;
- struct rtentry rt;
- struct sockaddr_in ina;
-
- if (!argc)
- return 0;
+ struct rtentry rt = {
+ .rt_dst = {.sa_family = AF_INET},
+ .rt_genmask = {.sa_family = AF_INET},
+ .rt_gateway = {.sa_family = AF_INET},
+ };
- strncpy(ifr.ifr_name, argv[0], IFNAMSIZ);
- ifr.ifr_name[IFNAMSIZ-1] = 0;
- ADVANCE(argc, argv);
+ 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 | RTF_HOST;
+ rt.rt_dev = argv[4];
+ errno = 0;
+ goto apply;
+ }
- if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
- die("cannot open control socket\n");
- }
-
- while(argc > 0){
- if (!strcmp(argv[0], "add")) {
- EXPECT_NEXT(argc, argv);
- if (!strcmp(argv[0], "default")) {
- EXPECT_NEXT(argc, argv);
- memset((char *) &rt, 0, sizeof(struct rtentry));
- rt.rt_dst.sa_family = AF_INET;
- if(!strcmp(argv[0], "dev")) {
- EXPECT_NEXT(argc, argv);
- rt.rt_flags = RTF_UP | RTF_HOST;
- rt.rt_dev = argv[0];
- if (ioctl(s, SIOCADDRT, &rt) < 0)
- die("SIOCADDRT\n");
- } else if (!strcmp(argv[0], "gw")) {
- EXPECT_NEXT(argc, argv);
- rt.rt_flags = RTF_UP | RTF_GATEWAY;
- init_sockaddr_in((struct sockaddr_in *)&(rt.rt_genmask), "0.0.0.0");
- if(isdigit(argv[0][0])) {
- init_sockaddr_in((struct sockaddr_in *)&(rt.rt_gateway), argv[0]);
- } else {
- die("expecting an IP address for parameter \"gw\"\n");
- }
- EXPECT_NEXT(argc, argv);
- if (!strcmp(argv[0], "dev")) {
- EXPECT_NEXT(argc, argv);
- rt.rt_dev = argv[0];
- if (ioctl(s, SIOCADDRT, &rt) < 0) {
- die("SIOCADDRT\n");
- }
- }
- }
- } else {
- char keywords[3][10] = { "-net", "netmask", "gw" };
- struct sockaddr_in *paddr[3] = { &rt.rt_dst, &rt.rt_genmask, &rt.rt_gateway };
- int k = 0;
-
- memset((char *) &rt, 0, sizeof(struct rtentry));
+ /* 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;
- do {
- if (!strcmp(argv[0], keywords[k])) {
- EXPECT_NEXT(argc, argv);
- if (isdigit(argv[0][0])) {
- init_sockaddr_in(paddr[k], argv[0]);
- } else {
- die("expecting an IP/MASK address for parameter %s\n", keywords[k]);
- }
- if (k < 2)
- EXPECT_NEXT(argc, argv);
- } else {
- die("expecting keyword(s)\n");
- }
- } while (++k < 3);
-
- if (ioctl(s, SIOCADDRT, &rt) < 0) {
- die("SIOCADDRT\n");
+ rt.rt_dev = argv[6];
+ if (set_address(argv[4], &rt.rt_gateway)) {
+ errno = 0;
}
+ goto apply;
}
}
- ADVANCE(argc, argv);
+
+ /* 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") && !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;
+ }
}
- return 0;
+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;
}