Set TCP_NODELAY on manager TCP sockets to prevent delays on outgoing packets. This regression was introduced in r48338.

AST-359


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@273270 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/manager.c

@@ -4604,11 +4604,26 @@ static void *session_do(void *data)
 	};
 	int flags;
 	int res;
+  	struct protoent *p;
 
 	if (session == NULL) {
 		goto done;
 	}
 
+ 	/* XXX here we set TCP_NODELAY on the socket to disable Nagle's
+ 	 * algorithm.  A better solution might be to buffer outgoing messages
+ 	 * until they are complete then write them to the socket in one burst
+ 	 * rather than sending them in bits and pieces. */
+  	p = getprotobyname("tcp");
+  	if (p) {
+  		int arg = 1;
+  		if( setsockopt(ser->fd, p->p_proto, TCP_NODELAY, (char *)&arg, sizeof(arg) ) < 0 ) {
+  			ast_log(LOG_WARNING, "Failed to set manager tcp connection to TCP_NODELAY mode: %s\nSome manager actions may be slow to respond.\n", strerror(errno));
+  		}
+  	} else {
+  		ast_log(LOG_WARNING, "Failed to set manager tcp connection to TCP_NODELAY, getprotobyname(\"tcp\") failed\nSome manager actions may be slow to respond.\n");
+  	}
+
 	flags = fcntl(ser->fd, F_GETFL);
 	if (!block_sockets) { /* make sure socket is non-blocking */
 		flags |= O_NONBLOCK;