auto import from //depot/cupcake/@135843
diff --git a/toolbox/route.c b/toolbox/route.c
new file mode 100644
index 0000000..adf5c69
--- /dev/null
+++ b/toolbox/route.c
@@ -0,0 +1,97 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <errno.h>
+#include <string.h>
+#include <ctype.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 *s)
+{
+ fprintf(stderr,"error: %s (%s)\n", s, strerror(errno));
+ exit(-1);
+}
+
+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 two kinds of usage */
+/* route add default dev wlan0 */
+/* route add default gw 192.168.20.1 dev wlan0 */
+
+int route_main(int argc, char *argv[])
+{
+ struct ifreq ifr;
+ int s,i;
+ struct rtentry rt;
+ struct sockaddr_in ina;
+
+ if(argc == 0) return 0;
+
+ strncpy(ifr.ifr_name, argv[0], IFNAMSIZ);
+ ifr.ifr_name[IFNAMSIZ-1] = 0;
+ ADVANCE(argc, argv);
+
+ 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");
+ }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\"");
+ }
+ 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");
+ }
+ }
+ }
+ }
+ }
+ ADVANCE(argc, argv);
+ }
+
+ return 0;
+}
+