Include the 0 terminator in the device string len

(Looking at the kernel code I think this won't make any difference in
Linux but I from the docs I think this is strictly right.)

diff --git a/udplisten.cc b/udplisten.cc
index b8ea5de..6786acc 100644 (file)
--- a/udplisten.cc
+++ b/udplisten.cc
@@ -29,7 +29,7 @@ int bindto(const char *dev) {
   if(setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof one) < 0)
     fatal("setsockopt SO_BROADCAST");
   if(dev && *dev) {
-    if(setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, dev, strlen(dev)) < 0)
+    if(setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, dev, strlen(dev) + 1) < 0)
       fatal("setsockopt SO_BINDTODEVICE %s", dev);
   }
   memset(&addr, 0, sizeof addr);