The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 1 | |
| 2 | #include <stdio.h> |
| 3 | #include <stdlib.h> |
| 4 | #include <unistd.h> |
| 5 | |
| 6 | #include <errno.h> |
| 7 | #include <string.h> |
| 8 | #include <ctype.h> |
| 9 | |
| 10 | #include <sys/socket.h> |
| 11 | #include <netinet/in.h> |
| 12 | #include <linux/if.h> |
| 13 | #include <linux/sockios.h> |
| 14 | #include <arpa/inet.h> |
| 15 | #include <linux/route.h> |
| 16 | |
| 17 | static void die(const char *s) |
| 18 | { |
| 19 | fprintf(stderr,"error: %s (%s)\n", s, strerror(errno)); |
| 20 | exit(-1); |
| 21 | } |
| 22 | |
| 23 | static inline void init_sockaddr_in(struct sockaddr_in *sin, const char *addr) |
| 24 | { |
| 25 | sin->sin_family = AF_INET; |
| 26 | sin->sin_port = 0; |
| 27 | sin->sin_addr.s_addr = inet_addr(addr); |
| 28 | } |
| 29 | |
| 30 | #define ADVANCE(argc, argv) do { argc--, argv++; } while(0) |
| 31 | #define EXPECT_NEXT(argc, argv) do { \ |
| 32 | ADVANCE(argc, argv); \ |
| 33 | if (0 == argc) { \ |
| 34 | errno = EINVAL; \ |
| 35 | die("expecting one more argument"); \ |
| 36 | } \ |
| 37 | } while(0) |
| 38 | |
| 39 | /* current support two kinds of usage */ |
| 40 | /* route add default dev wlan0 */ |
| 41 | /* route add default gw 192.168.20.1 dev wlan0 */ |
| 42 | |
| 43 | int route_main(int argc, char *argv[]) |
| 44 | { |
| 45 | struct ifreq ifr; |
| 46 | int s,i; |
| 47 | struct rtentry rt; |
| 48 | struct sockaddr_in ina; |
| 49 | |
| 50 | if(argc == 0) return 0; |
| 51 | |
| 52 | strncpy(ifr.ifr_name, argv[0], IFNAMSIZ); |
| 53 | ifr.ifr_name[IFNAMSIZ-1] = 0; |
| 54 | ADVANCE(argc, argv); |
| 55 | |
| 56 | if((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| 57 | die("cannot open control socket\n"); |
| 58 | } |
| 59 | |
| 60 | while(argc > 0){ |
| 61 | if(!strcmp(argv[0], "add")) { |
| 62 | EXPECT_NEXT(argc, argv); |
| 63 | if(!strcmp(argv[0], "default")) { |
| 64 | EXPECT_NEXT(argc, argv); |
| 65 | memset((char *) &rt, 0, sizeof(struct rtentry)); |
| 66 | rt.rt_dst.sa_family = AF_INET; |
| 67 | if(!strcmp(argv[0], "dev")) { |
| 68 | EXPECT_NEXT(argc, argv); |
| 69 | rt.rt_flags = RTF_UP | RTF_HOST; |
| 70 | rt.rt_dev = argv[0]; |
| 71 | if (ioctl(s, SIOCADDRT, &rt) < 0) die("SIOCADDRT"); |
| 72 | }else if(!strcmp(argv[0], "gw")) { |
| 73 | EXPECT_NEXT(argc, argv); |
| 74 | rt.rt_flags = RTF_UP | RTF_GATEWAY; |
| 75 | init_sockaddr_in((struct sockaddr_in *)&(rt.rt_genmask), "0.0.0.0"); |
| 76 | if(isdigit(argv[0][0])){ |
| 77 | init_sockaddr_in((struct sockaddr_in *)&(rt.rt_gateway), argv[0]); |
| 78 | }else{ |
| 79 | die("expecting an IP address for parameter \"gw\""); |
| 80 | } |
| 81 | EXPECT_NEXT(argc, argv); |
| 82 | if(!strcmp(argv[0], "dev")) { |
| 83 | EXPECT_NEXT(argc, argv); |
| 84 | rt.rt_dev = argv[0]; |
| 85 | if (ioctl(s, SIOCADDRT, &rt) < 0){ |
| 86 | die("SIOCADDRT"); |
| 87 | } |
| 88 | } |
| 89 | } |
| 90 | } |
| 91 | } |
| 92 | ADVANCE(argc, argv); |
| 93 | } |
| 94 | |
| 95 | return 0; |
| 96 | } |
| 97 | |