Merge pull request #386 from kmroz/nl-bufsize

ifevent: increase netlink socket recv buffer size

src/ifevent.c

@@ -675,6 +675,7 @@ ni_server_listen_interface_events(void (*ifevent_handler)(ni_netdev_t *, ni_even
 	ni_socket_t *sock;
 	uint32_t groups = 0;
 	int fd;
+	unsigned int rsize = 1024*1024; /* required nl_sock receive buf size */
 
 	if (__ni_rtevent_sock || ni_global.interface_event) {
 		ni_error("Interface event handler is already set");
@@ -720,6 +721,11 @@ ni_server_listen_interface_events(void (*ifevent_handler)(ni_netdev_t *, ni_even
 		return -1;
 	}
 
+	if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF,
+			(char *)&rsize, sizeof rsize)) {
+		ni_warn("unable to set receive buffer to %u bytes", rsize);
+	}
+
 	sock->user_data	= nl_sock;
 	sock->receive	= __ni_rtevent_receive;
 	sock->close	= __ni_rtevent_close;