From: Azat Khuzhin <azat@libevent.org>
Date: Sat, 12 Nov 2022 17:45:13 +0000 (+0100)
Subject: ws: ignore case while comparing values of Upgrade/Connection headers
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=56d380b9b6d07839b688dd1355828182a021b03e;p=libevent

ws: ignore case while comparing values of Upgrade/Connection headers

Cc: @widgetii
Fixes: #1373
---

diff --git a/ws.c b/ws.c
index 5acaf783..8e2b2958 100644
--- a/ws.c
+++ b/ws.c
@@ -353,11 +353,11 @@ evws_new_session(
 
 	in_hdrs = evhttp_request_get_input_headers(req);
 	upgrade = evhttp_find_header(in_hdrs, "Upgrade");
-	if (upgrade == NULL || strcmp(upgrade, "websocket"))
+	if (upgrade == NULL || evutil_ascii_strcasecmp(upgrade, "websocket"))
 		goto error;
 
 	connection = evhttp_find_header(in_hdrs, "Connection");
-	if (connection == NULL || strcmp(connection, "Upgrade"))
+	if (connection == NULL || evutil_ascii_strcasecmp(connection, "Upgrade"))
 		goto error;
 
 	ws_key = evhttp_find_header(in_hdrs, "Sec-WebSocket-Key");