X-Git-Url: http://vcs.maemo.org/git/?a=blobdiff_plain;f=src%2Fcommon.c;h=ac3e27fab3439bac5bfe889dc948c882607686a7;hb=99a496b3ea09af27e7cdb30f05309d57787c1e1e;hp=a9aa2d9d94b336d72305c211e13f6e530c8d0b3f;hpb=50bac8400624db1ca8dc96e8ae5489c9275f1f4f;p=monky

diff --git a/src/common.c b/src/common.c
index a9aa2d9..ac3e27f 100644
--- 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;