- squelch TCP fast open error on FreeBSD when kernel has it disabled,

unless verbosity is high.


git-svn-id: file:///svn/unbound/trunk@4279 be551aaa-1e26-0410-a405-d3ace91eadb9

doc/Changelog

@@ -4,6 +4,8 @@
 	- annotate case statement fallthrough for gcc 7.1.1.
 	- flex output from flex 2.6.1.
 	- snprintf of thread number does not warn about truncated string.
+	- squelch TCP fast open error on FreeBSD when kernel has it disabled,
+	  unless verbosity is high.
 
 17 July 2017: Wouter
 	- Fix #1350: make cachedb backend configurable (from JINMEI Tatuya).

services/listen_dnsport.c

@@ -792,6 +792,11 @@ create_tcp_accept_sock(struct addrinfo *addr, int v6only, int* noproto,
 #endif
 	if ((setsockopt(s, IPPROTO_TCP, TCP_FASTOPEN, &qlen, 
 		  sizeof(qlen))) == -1 ) {
+#ifdef ENOPROTOOPT
+		/* squelch ENOPROTOOPT: freebsd server mode with kernel support
+		   disabled, except when verbosity enabled for debugging */
+		if(errno != ENOPROTOOPT || verbosity >= 3)
+#endif
 		  log_err("Setting TCP Fast Open as server failed: %s", strerror(errno));
 	}
 #endif