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/* vi: set sw=4 ts=4: */
/*
* Small implementation of brctl for busybox.
*
* Copyright (C) 2008 by Bernhard Fischer
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include "libbb.h"
#include <linux/sockios.h>
#include <net/if.h>
#ifdef ENABLE_FEATURE_BRCTL_SHOW
#error Remove these
#endif
#define ENABLE_FEATURE_BRCTL_SHOW 0
#define USE_FEATURE_BRCTL_SHOW(...)
/* Fancy diagnostics -- printing add/del -- costs 49 bytes. */
#if 0
#define BRCTL_VERBOSE(...) __VA_ARGS__
#else
#define BRCTL_VERBOSE(...)
#endif
int brctl_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int brctl_main(int argc, char **argv)
{
int fd;
static const char keywords[] ALIGN1 =
"addbr\0" "delbr\0" "addif\0" "delif\0"
USE_FEATURE_BRCTL_SHOW("show\0");
enum { ARG_addbr = 1, ARG_delbr, ARG_addif, ARG_delif
USE_FEATURE_BRCTL_SHOW(, ARG_show) };
smalluint key;
static char info[] = BRCTL_VERBOSE("%s ")"bridge %s\0 iface %s";
char *br;
argv++;
while (*argv) {
BRCTL_VERBOSE(char *op;)
key = index_in_strings(keywords, *argv) + 1;
if (key == 0) /* no match found in keywords array, bail out. */
bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
argv++;
#if ENABLE_FEATURE_BRCTL_SHOW
if (key == ARG_show) { /* show */
;
}
#endif
BRCTL_VERBOSE(op = (char*)((key % 2) ? "add" : "del");)
fd = xsocket(AF_INET, SOCK_STREAM, 0);
br = *(argv++);
if (key < 3) { /* addbr or delbr */
if (ioctl(fd, key == ARG_addbr ? SIOCBRADDBR : SIOCBRDELBR, br) < 0)
{
info[9 BRCTL_VERBOSE(+3)] = '\0';
bb_perror_msg_and_die(info, BRCTL_VERBOSE(op,) br);
}
}
if (key > 2) { /* addif or delif */
struct ifreq ifr;
char *brif;
if (!*argv)
bb_show_usage();
brif = *(argv++);
if (!(ifr.ifr_ifindex = if_nametoindex(brif))) {
bb_perror_msg_and_die(info+11 BRCTL_VERBOSE(+3), brif);
}
safe_strncpy(ifr.ifr_name, br, IFNAMSIZ);
if (ioctl(fd,
key == ARG_addif ? SIOCBRADDIF : SIOCBRDELIF, &ifr) < 0) {
info[9 BRCTL_VERBOSE(+3)] = ',';
bb_perror_msg_and_die (info, BRCTL_VERBOSE(op,) br, brif);
}
}
if (ENABLE_FEATURE_CLEAN_UP)
close(fd);
}
return EXIT_SUCCESS;
}
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