Adding if_up support for FreeBSD.

[monky] / src / common.c

diff --git a/src/common.c b/src/common.c
index a9aa2d9..ac3e27f 100644 (file)
--- a/src/common.c
+++ b/src/common.c
@@ -32,6 +32,9 @@
 #include <ctype.h>
 #include <errno.h>
 #include <sys/time.h>
+#include <sys/ioctl.h>
+#include <net/if.h>
+#include <netinet/in.h>
 #include <pthread.h>
 #include "diskio.h"
 
@@ -186,6 +189,49 @@ void clear_net_stats(void)
        memset(netstats, 0, sizeof(netstats));
 }
 
+/* We should check if this is ok with OpenBSD and NetBSD as well. */
+int interface_up(const char *dev)
+{
+       int fd;
+       struct ifreq ifr;
+
+       if ((fd = socket(PF_INET, SOCK_DGRAM, 0)) < 0) {
+               CRIT_ERR("could not create sockfd");
+               return 0;
+       }
+       strncpy(ifr.ifr_name, dev, IFNAMSIZ);
+       if (ioctl(fd, SIOCGIFFLAGS, &ifr)) {
+               /* if device does not exist, treat like not up */
+               if (errno != ENODEV && errno != ENXIO)
+                       perror("SIOCGIFFLAGS");
+               goto END_FALSE;
+       }
+
+       if (!(ifr.ifr_flags & IFF_UP)) /* iface is not up */
+               goto END_FALSE;
+       if (ifup_strictness == IFUP_UP)
+               goto END_TRUE;
+
+       if (!(ifr.ifr_flags & IFF_RUNNING))
+               goto END_FALSE;
+       if (ifup_strictness == IFUP_LINK)
+               goto END_TRUE;
+
+       if (ioctl(fd, SIOCGIFADDR, &ifr)) {
+               perror("SIOCGIFADDR");
+               goto END_FALSE;
+       }
+       if (((struct sockaddr_in *)&(ifr.ifr_ifru.ifru_addr))->sin_addr.s_addr)
+               goto END_TRUE;
+
+END_FALSE:
+       close(fd);
+       return 0;
+END_TRUE:
+       close(fd);
+       return 1;
+}
+
 void free_dns_data(void)
 {
        int i;