Increase timeout/number of retries in TFTP.

CHANGELOG

@@ -56,7 +56,11 @@ version 2.67
 	    we can't use SO_BINDTODEVICE. Thanks to Natrio for the bug
 	    report. 
 
-		
+	    Increase timeout/number of retries in TFTP to accomodate
+	    AudioCodes Voice Gateways doing streaming writes to flash.
+	    Thanks to Damian Kaczkowski for spotting the problem.
+
+
 version 2.66
             Add the ability to act as an authoritative DNS
             server. Dnsmasq can now answer queries from the wider 'net

src/tftp.c

@@ -555,7 +555,7 @@ void check_tftp_listeners(fd_set *rset, time_t now)
 	    }
 	  /* don't complain about timeout when we're awaiting the last
 	     ACK, some clients never send it */
-	  else if (++transfer->backoff > 5 && len != 0)
+	  else if (++transfer->backoff > 7 && len != 0)
 	    {
 	      endcon = 1;
 	      len = 0;