Check IP address command line arg in dhcp_release.c

iagox86 · Apr 19, 2015 · a006eb7 · a006eb7
1 parent 554b580
commit a006eb7
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/contrib/wrt/dhcp_release.c b/contrib/wrt/dhcp_release.c
@@ -277,6 +277,11 @@ int main(int argc, char **argv)
       exit(1);
     }
 
+  if (inet_addr(argv[2]) == INADDR_NONE)
+    {
+      perror("invalid ip address");
+      exit(1);
+    }
 
   lease.s_addr = inet_addr(argv[2]);
   server = find_interface(lease, nl, if_nametoindex(argv[1]));