[libsoup] Fix invalid close code

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 0366756970e3b38fa63ad9200d09e9a4068b261e
Author: Italo Guerrieri <guerital amazon it>
Date:   Thu Dec 28 12:17:55 2017 +0100

    Fix invalid close code
    
    Close the connection with a protocol error, if a close control
    uses a code reserved for future implementations of the WebSocket
    protocol.
    Fix Autobahn test cases 7.9.*.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=792113

 libsoup/soup-websocket-connection.c |   21 ++++++++++++++++++---
 1 files changed, 18 insertions(+), 3 deletions(-)
---
diff --git a/libsoup/soup-websocket-connection.c b/libsoup/soup-websocket-connection.c
index b93fab2..f11edfe 100644
--- a/libsoup/soup-websocket-connection.c
+++ b/libsoup/soup-websocket-connection.c
@@ -578,7 +578,11 @@ close_connection (SoupWebsocketConnection *self,
                }
                break;
        default:
-               g_debug ("Wrong closing code %d received", code);
+               if (code < 3000) {
+                       g_debug ("Wrong closing code %d received", code);
+                       protocol_error_and_close (self);
+                       return;
+               }
        }
 
        g_signal_emit (self, signals[CLOSING], 0);
@@ -605,10 +609,21 @@ receive_close (SoupWebsocketConnection *self,
        pv->peer_close_data = NULL;
        pv->close_received = TRUE;
 
-       /* Store the code/data payload */
-       if (len >= 2) {
+       switch (len) {
+       case 0:
+               /* Send a clean close when having an empty payload */
+               close_connection (self, 1000, NULL);
+               return;
+       case 1:
+               /* Send a protocol error since the close code is incomplete */
+               protocol_error_and_close (self);
+               return;
+       default:
+               /* Store the code/data payload */
                pv->peer_close_code = (guint16)data[0] << 8 | data[1];
+               break;
        }
+
        if (len > 2) {
                data += 2;
                len -= 2;