--- embedaddon/quagga/isisd/isis_bpf.c	2012/10/09 09:22:28	1.1.1.2
+++ embedaddon/quagga/isisd/isis_bpf.c	2016/11/02 10:09:10	1.1.1.3
@@ -29,6 +29,7 @@
 #include <net/bpf.h>
 
 #include "log.h"
+#include "network.h"
 #include "stream.h"
 #include "if.h"
 
@@ -301,13 +302,14 @@ int
 isis_send_pdu_bcast (struct isis_circuit *circuit, int level)
 {
   struct ether_header *eth;
-  int written, buflen;
+  ssize_t written;
+  size_t buflen;
 
   buflen = stream_get_endp (circuit->snd_stream) + LLC_LEN + ETHER_HDR_LEN;
   if (buflen > sizeof (sock_buff))
     {
-      zlog_warn ("isis_send_pdu_bcast: sock_buff size %lu is less than "
-		 "output pdu size %d on circuit %s",
+      zlog_warn ("isis_send_pdu_bcast: sock_buff size %zu is less than "
+		 "output pdu size %zu on circuit %s",
 		 sizeof (sock_buff), buflen, circuit->interface->name);
       return ISIS_WARNING;
     }
@@ -338,6 +340,14 @@ isis_send_pdu_bcast (struct isis_circuit *circuit, int
 
   /* now we can send this */
   written = write (circuit->fd, sock_buff, buflen);
+  if (written < 0)
+    {
+      zlog_warn("IS-IS bpf: could not transmit packet on %s: %s",
+                circuit->interface->name, safe_strerror(errno));
+      if (ERRNO_IO_RETRY(errno))
+        return ISIS_WARNING;
+      return ISIS_ERROR;
+    }
 
   return ISIS_OK;
 }