v0.0.1

devcheck.c

@@ -0,0 +1,57 @@
+#include <stdio.h>
+#include <sys/ioctl.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include "dhsd.h"
+
+
+int devcheck(char *dev)
+{
+   int fd;
+   struct sockaddr *sa;
+   struct sockaddr_in *sin;
+   struct ifreq ifr;
+
+   char *toldaddr;
+
+   toldaddr = oldaddr;
+
+   fd = socket(PF_INET,SOCK_STREAM,0);
+   if (fd == -1) {
+      pdebug("socket() failed");
+      return -1;
+   }
+       
+   /* Copy the interface name into the buffer */
+   strncpy(ifr.ifr_name,dev,IFNAMSIZ);
+        
+   if (ioctl(fd,SIOCGIFADDR,&ifr) == -1) {
+      pdebug("device ioctl failed");
+      oldaddr = '\0'; // Hackaratus?
+      return -1;
+   }
+   /* Now the buffer will contain the information we requested */
+   sa = (struct sockaddr *)&(ifr.ifr_addr);
+   if (sa->sa_family == AF_INET) {
+      sin = (struct sockaddr_in*) sa;
+      pdebug(toldaddr);
+      if (inet_ntoa(sin->sin_addr) != toldaddr) {
+         oldaddr = inet_ntoa(sin->sin_addr); 
+         close(fd);
+         return 1;
+      } else {
+         pdebug(inet_ntoa(sin->sin_addr));
+         close(fd);
+         return 0;
+      }
+   } else {
+      printf(": Unknown Address Family (%d)\n",sa->sa_family);
+   }
+
+   close(fd);
+   return -1;
+}