| Bernhard Reutner-Fischer | d27d925 | 2008-01-13 15:23:27 +0000 | [diff] [blame^] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * Small implementation of brctl for busybox. |
| 4 | * |
| 5 | * Copyright (C) 2008 by Bernhard Fischer |
| 6 | * |
| 7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
| 8 | */ |
| 9 | #include "libbb.h" |
| 10 | #include <linux/sockios.h> |
| 11 | #include <net/if.h> |
| 12 | |
| 13 | #ifdef ENABLE_FEATURE_BRCTL_SHOW |
| 14 | #error Remove these |
| 15 | #endif |
| 16 | #define ENABLE_FEATURE_BRCTL_SHOW 0 |
| 17 | #define USE_FEATURE_BRCTL_SHOW(...) |
| 18 | |
| 19 | |
| 20 | /* Fancy diagnostics -- printing add/del -- costs 49 bytes. */ |
| 21 | #if 0 |
| 22 | #define BRCTL_VERBOSE(...) __VA_ARGS__ |
| 23 | #else |
| 24 | #define BRCTL_VERBOSE(...) |
| 25 | #endif |
| 26 | |
| 27 | int brctl_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| 28 | int brctl_main(int argc, char **argv) |
| 29 | { |
| 30 | int fd; |
| 31 | static const char keywords[] ALIGN1 = |
| 32 | "addbr\0" "delbr\0" "addif\0" "delif\0" |
| 33 | USE_FEATURE_BRCTL_SHOW("show\0"); |
| 34 | enum { ARG_addbr = 1, ARG_delbr, ARG_addif, ARG_delif |
| 35 | USE_FEATURE_BRCTL_SHOW(, ARG_show) }; |
| 36 | smalluint key; |
| 37 | static char info[] = BRCTL_VERBOSE("%s ")"bridge %s\0 iface %s"; |
| 38 | |
| 39 | argv++; |
| 40 | while (*argv) { |
| 41 | BRCTL_VERBOSE(char *op;) |
| 42 | |
| 43 | key = index_in_strings(keywords, *argv) + 1; |
| 44 | if (key == 0) /* no match found in keywords array, bail out. */ |
| 45 | bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name); |
| 46 | argv++; |
| 47 | #if ENABLE_FEATURE_BRCTL_SHOW |
| 48 | if (key == ARG_show) { /* show */ |
| 49 | ; |
| 50 | } |
| 51 | #endif |
| 52 | BRCTL_VERBOSE(op = (char*)((key % 2) ? "add" : "del");) |
| 53 | fd = xsocket(AF_INET, SOCK_STREAM, 0); |
| 54 | if (key < 3) {/* addbr or delbr */ |
| 55 | char *br; |
| 56 | |
| 57 | br = *(argv++); |
| 58 | if (ioctl(fd, key == ARG_addbr ? SIOCBRADDBR : SIOCBRDELBR, br) < 0) |
| 59 | { |
| 60 | info[9 BRCTL_VERBOSE(+3)] = '\0'; |
| 61 | bb_perror_msg_and_die(info, BRCTL_VERBOSE(op,) br); |
| 62 | } |
| 63 | } |
| 64 | if (key > 2) { /* addif or delif */ |
| 65 | struct ifreq ifr; |
| 66 | char *br, *brif; |
| 67 | |
| 68 | br = *(argv++); |
| 69 | if (!*argv) |
| 70 | bb_show_usage(); |
| 71 | brif = *(argv++); |
| 72 | |
| 73 | if (!(ifr.ifr_ifindex = if_nametoindex(brif))) { |
| 74 | bb_perror_msg_and_die(info+11 BRCTL_VERBOSE(+3), brif); |
| 75 | } |
| 76 | safe_strncpy(ifr.ifr_name, br, IFNAMSIZ); |
| 77 | if (ioctl(fd, |
| 78 | key == ARG_addif ? SIOCBRADDIF : SIOCBRDELIF, &ifr) < 0) { |
| 79 | info[9 BRCTL_VERBOSE(+3)] = ','; |
| 80 | bb_perror_msg_and_die (info, BRCTL_VERBOSE(op,) br, brif); |
| 81 | } |
| 82 | } |
| 83 | if (ENABLE_FEATURE_CLEAN_UP) |
| 84 | close(fd); |
| 85 | } |
| 86 | return EXIT_SUCCESS; |
| 87 | } |