ab53132154
patch action. Fixed typos in source code, comments, manual pages, and changelog. Corrections provided by Jens Schleusener of FOSSIES (fossies.org).
140 lines
3.5 KiB
C
140 lines
3.5 KiB
C
/*
|
|
* ifdown.c Find all network interfaces on the system and
|
|
* shut them down.
|
|
*
|
|
* Copyright (C) 1998 Miquel van Smoorenburg.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*/
|
|
char *v_ifdown = "@(#)ifdown.c 1.11 02-Jun-1998 miquels@cistron.nl";
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <time.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
|
|
#include <sys/ioctl.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/time.h>
|
|
|
|
#include <net/if.h>
|
|
#include <netinet/in.h>
|
|
|
|
#define MAX_IFS 64
|
|
|
|
/* XXX: Ideally this would get detected at configure time... */
|
|
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
|
|
defined(__NetBSD__) || defined(__OpenBSD__)
|
|
#define HAVE_SOCKADDR_SA_LEN 1
|
|
#endif
|
|
|
|
#ifndef _SIZEOF_ADDR_IFREQ
|
|
#ifdef HAVE_SOCKADDR_SA_LEN
|
|
#define _SIZEOF_ADDR_IFREQ(ifr) \
|
|
((ifr).ifr_addr.sa_len > sizeof(struct sockaddr) ? \
|
|
(sizeof((ifr).ifr_name) + (ifr).ifr_addr.sa_len) : \
|
|
sizeof(struct ifreq))
|
|
#else
|
|
#define _SIZEOF_ADDR_IFREQ(ifr) sizeof(struct ifreq)
|
|
#endif
|
|
#endif
|
|
|
|
/*
|
|
* First, we find all shaper devices and down them. Then we
|
|
* down all real interfaces. This is because the comment in the
|
|
* shaper driver says "if you down the shaper device before the
|
|
* attached interface your computer will follow".
|
|
*/
|
|
int ifdown(void)
|
|
{
|
|
char ifr_buf[sizeof(struct ifreq) * MAX_IFS];
|
|
char *ifr_end;
|
|
struct ifconf ifc;
|
|
int fd;
|
|
int shaper;
|
|
|
|
if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
|
|
fprintf(stderr, "ifdown: ");
|
|
perror("socket");
|
|
return -1;
|
|
}
|
|
ifc.ifc_len = sizeof(ifr_buf);
|
|
ifc.ifc_buf = ifr_buf;
|
|
|
|
if (ioctl(fd, SIOCGIFCONF, &ifc) < 0) {
|
|
fprintf(stderr, "ifdown: ");
|
|
perror("SIOCGIFCONF");
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
ifr_end = ifr_buf + ifc.ifc_len;
|
|
|
|
for (shaper = 1; shaper >= 0; shaper--) {
|
|
char *ifr_next = ifr_buf;
|
|
|
|
while (ifr_next < ifr_end) {
|
|
struct ifreq *ifr;
|
|
int flags;
|
|
|
|
ifr = (struct ifreq *)ifr_next;
|
|
ifr_next += _SIZEOF_ADDR_IFREQ(*ifr);
|
|
|
|
if ((strncmp(ifr->ifr_name, "shaper", 6) == 0)
|
|
!= shaper) continue;
|
|
|
|
if (strncmp(ifr->ifr_name, "lo", 2) == 0)
|
|
continue;
|
|
if (strchr(ifr->ifr_name, ':') != NULL)
|
|
continue;
|
|
|
|
/* Read interface flags */
|
|
if (ioctl(fd, SIOCGIFFLAGS, ifr) < 0) {
|
|
fprintf(stderr, "ifdown: shutdown ");
|
|
perror(ifr->ifr_name);
|
|
continue;
|
|
}
|
|
/*
|
|
* Expected in <net/if.h> according to
|
|
* "UNIX Network Programming".
|
|
*/
|
|
#ifdef ifr_flagshigh
|
|
flags = (ifr->ifr_flags & 0xffff) |
|
|
(ifr->ifr_flagshigh << 16);
|
|
#else
|
|
flags = ifr->ifr_flags;
|
|
#endif
|
|
if (flags & IFF_UP) {
|
|
flags &= ~(IFF_UP);
|
|
#ifdef ifr_flagshigh
|
|
ifr->ifr_flags = flags & 0xffff;
|
|
ifr->ifr_flagshigh = flags >> 16;
|
|
#else
|
|
ifr->ifr_flags = flags;
|
|
#endif
|
|
if (ioctl(fd, SIOCSIFFLAGS, ifr) < 0) {
|
|
fprintf(stderr, "ifdown: shutdown ");
|
|
perror(ifr->ifr_name);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
close(fd);
|
|
|
|
return 0;
|
|
}
|