From 7a4dcd93ba3dfbe6698a1de9528a3e87390a99e3 Mon Sep 17 00:00:00 2001
From: David Woodhouse <David.Woodhouse@intel.com>
Date: Mon, 4 Mar 2013 00:25:03 +0000
Subject: [PATCH] Don't attempt to parse empty response from server

I couldn't trigger this until I hacked up stuff elsewhere to return
artificial failures, but still...

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
---
 auth.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/auth.c b/auth.c
index 361f656c..ff2eae9d 100644
--- a/auth.c
+++ b/auth.c
@@ -493,6 +493,12 @@ int parse_xml_response(struct openconnect_info *vpninfo, char *response, struct
 		*formp = NULL;
 	}
 
+	if (!response) {
+		vpn_progress(vpninfo, PRG_TRACE,
+			     _("Empty response from server\n"));
+		return -EINVAL;
+	}
+
 	form = calloc(1, sizeof(*form));
 	if (!form)
 		return -ENOMEM;