From 61e58885f48f7519a6a546922f14d8a35be3501e Mon Sep 17 00:00:00 2001
From: namowen <namowen@user.github.invalid.com>
Date: Tue, 25 Jul 2017 17:14:37 +0800
Subject: [PATCH] client: ipv6 reject when lws_getaddrinfo46 failed

https://github.com/warmcat/libwebsockets/issues/978
---
 lib/client-handshake.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/client-handshake.c b/lib/client-handshake.c
index 42d1a9b..6ae27d2 100644
--- a/lib/client-handshake.c
+++ b/lib/client-handshake.c
@@ -111,6 +111,14 @@ lws_client_connect_2(struct lws *wsi)
 #ifdef LWS_USE_IPV6
 	if (wsi->ipv6) {
 
+		if (n) {
+			/* lws_getaddrinfo46 failed, there is no usable result */
+			lwsl_notice("%s: lws_getaddrinfo46 failed %d\n",
+					__func__, n);
+			cce = "ipv6 lws_getaddrinfo46 failed";
+			goto oom4;
+		}
+
 		memset(&sa46, 0, sizeof(sa46));
 
 		sa46.sa6.sin6_family = AF_INET6;
-- 
2.7.4