ignore any sendmsg() errors

--HG--
branch : fastopen

netio.c

@@ -103,8 +103,10 @@ static void connect_try_next(struct dropbear_progress_connection *c) {
 			message.msg_iov = packet_queue_to_iovec(c->writequeue, &iovlen);
 			message.msg_iovlen = iovlen;
 			res = sendmsg(c->sock, &message, MSG_FASTOPEN);
-			if (res < 0 && errno == EOPNOTSUPP) {
-				TRACE(("Fastopen not supported"));
+			if (res < 0) {
+				/* Not entirely sure which kind of errors are normal - 2.6.32 seems to 
+				return EPIPE for any (nonblocking?) sendmsg(). just fall back */
+				TRACE(("sendmsg tcp_fastopen failed, falling back. %s", strerror(errno)));
 				/* No kernel MSG_FASTOPEN support. Fall back below */
 				fastopen = 0;
 				/* Set to NULL to avoid trying again */