#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 <sys/errno.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
*/
int ifdown(void)
{
- struct ifreq ifr[MAX_IFS];
+ char ifr_buf[sizeof(struct ifreq) * MAX_IFS];
+ char *ifr_end;
struct ifconf ifc;
- int i, fd;
- int numif;
+ int fd;
int shaper;
if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
perror("socket");
return -1;
}
- ifc.ifc_len = sizeof(ifr);
- ifc.ifc_req = ifr;
+ ifc.ifc_len = sizeof(ifr_buf);
+ ifc.ifc_buf = ifr_buf;
if (ioctl(fd, SIOCGIFCONF, &ifc) < 0) {
fprintf(stderr, "ifdown: ");
close(fd);
return -1;
}
- numif = ifc.ifc_len / sizeof(struct ifreq);
+ ifr_end = ifr_buf + ifc.ifc_len;
for (shaper = 1; shaper >= 0; shaper--) {
- for (i = 0; i < numif; i++) {
+ char *ifr_next = ifr_buf;
+
+ while (ifr_next < ifr_end) {
+ struct ifreq *ifr;
+ int flags;
- if ((strncmp(ifr[i].ifr_name, "shaper", 6) == 0)
+ ifr = (struct ifreq *)ifr_next;
+ ifr_next += _SIZEOF_ADDR_IFREQ(*ifr);
+
+ if ((strncmp(ifr->ifr_name, "shaper", 6) == 0)
!= shaper) continue;
- if (strcmp(ifr[i].ifr_name, "lo") == 0)
+ if (strncmp(ifr->ifr_name, "lo", 2) == 0)
continue;
- if (strchr(ifr[i].ifr_name, ':') != NULL)
+ if (strchr(ifr->ifr_name, ':') != NULL)
continue;
/* Read interface flags */
- if (ioctl(fd, SIOCGIFFLAGS, &ifr[i]) < 0) {
+ if (ioctl(fd, SIOCGIFFLAGS, ifr) < 0) {
fprintf(stderr, "ifdown: shutdown ");
- perror(ifr[i].ifr_name);
+ perror(ifr->ifr_name);
continue;
}
/*
* Expected in <net/if.h> according to
* "UNIX Network Programming".
*/
-#ifdef ifr_flags
-# define IRFFLAGS ifr_flags
-#else /* Present on kFreeBSD */
-# define IRFFLAGS ifr_flagshigh
+#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 (ifr[i].IRFFLAGS & IFF_UP) {
- ifr[i].IRFFLAGS &= ~(IFF_UP);
- if (ioctl(fd, SIOCSIFFLAGS, &ifr[i]) < 0) {
+ if (ioctl(fd, SIOCSIFFLAGS, ifr) < 0) {
fprintf(stderr, "ifdown: shutdown ");
- perror(ifr[i].ifr_name);
+ perror(ifr->ifr_name);
}
}
-#undef IRFFLAGS
}
}
close(fd);