[PATCH] Only reply if a valid MX header is present

[Jens Georg <mail jensge org>]

Fixes UPnP CTT test UDA-1.2.9
---
 libgssdp/gssdp-resource-group.c |   11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/libgssdp/gssdp-resource-group.c b/libgssdp/gssdp-resource-group.c
index 231cbc5..78f1fa6 100644
--- a/libgssdp/gssdp-resource-group.c
+++ b/libgssdp/gssdp-resource-group.c
@@ -768,10 +768,13 @@ message_received_cb (GSSDPClient        *client,
 
         /* Extract MX */
         mx_str = soup_message_headers_get_one (headers, "MX");
-        if (mx_str)
-                mx = atoi (mx_str);
-        else
-                mx = SSDP_DEFAULT_MX;
+        if (!mx_str || atoi (mx_str) == 0) {
+                g_warning ("Discovery request did not have a valid MX header");
+
+                return;
+        }
+
+        mx = atoi (mx_str);
 
         /* Extract version */
         version_str = get_version_for_target ((char *)target);
-- 
1.7.5.2