From 5519d9f0544264fe71e0badd3d858d8ffbef2431 Mon Sep 17 00:00:00 2001
From: Nick Dowell <nick@nickdowell.com>
Date: Tue, 3 Apr 2012 17:22:19 +0100
Subject: [PATCH] handle unsupported protocol correctly

Hi Andy,

First off, thanks for libwebsockets :-)

I've encountered a crash when a client connects to a libwebsockets server
but speicifies an unsupported protocol (Sec-WebSocket-Protocol).
handshake.c should probably be checking that wsi->protocol->name is not
null before doing a strcmp with it...
Attached is a patch for your consideration.

Cheers!
Nick

Signed-off-by: Nick Dowell <nick@nickdowell.com>
---
 lib/handshake.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/handshake.c b/lib/handshake.c
index dafccef2..dca2e141 100644
--- a/lib/handshake.c
+++ b/lib/handshake.c
@@ -619,7 +619,7 @@ libwebsocket_read(struct libwebsocket_context *context, struct libwebsocket *wsi
 				if (wsi->protocol->name == NULL)
 					break;
 			} else
-				if (strcmp(
+				if (wsi->protocol->name && strcmp(
 				     wsi->utf8_token[WSI_TOKEN_PROTOCOL].token,
 						      wsi->protocol->name) == 0)
 					break;