From: Xiang Dai <764524258@qq.com>
Date: Tue, 3 Sep 2019 05:53:54 +0000 (+0800)
Subject: Avoid slow reverse-DNS requests caused by libwebsocket (#222)
X-Git-Url: http://git.prime8.dev/?a=commitdiff_plain;h=94817b4eb37ea547893f26c9fc1b5ede2292e69b;p=ttyd.git

Avoid slow reverse-DNS requests caused by libwebsocket (#222)

* Avoid slow reverse-DNS requests caused by libwebsocket

According to warmcat/libwebsockets#537 and following my own experience, in some circumstances lws_get_peer_addresses can take several seconds to execute a reverse DNS request on a connected peer IP. The effect is that sometimes a websocket connection takes several seconds before it is established.
This PR addresses the described issue by replacing lws_get_peer_addresses with lws_get_peer_simple that completely skips the RDNS request.

Signed-off-by: Xiang Dai <764524258@qq.com>
---

diff --git a/src/http.c b/src/http.c
index f3bd462..f0b8666 100644
--- a/src/http.c
+++ b/src/http.c
@@ -62,14 +62,16 @@ check_auth(struct lws *wsi, struct pss_http *pss) {
 }
 
 void access_log(struct lws *wsi, const char *path) {
-    char name[100], rip[50];
+    char rip[50];
+
 #if LWS_LIBRARY_VERSION_MAJOR >=2 && LWS_LIBRARY_VERSION_MINOR >=4
     struct lws *n_wsi = lws_get_network_wsi(wsi);
 #else
     struct lws *n_wsi = wsi;
 #endif
-    lws_get_peer_addresses(wsi, lws_get_socket_fd(n_wsi), name, sizeof(name), rip, sizeof(rip));
-    lwsl_notice("HTTP %s - %s (%s)\n", path, rip, name);
+
+    lws_get_peer_simple(wsi, rip, sizeof(rip));
+    lwsl_notice("HTTP %s - %s\n", path, rip);
 }
 
 int