res_pjsip_t38: Don't pass T.38 control frames through to other hooks.

This crept up during gateway testing where the gateway would receive
the request to negotiate and assume it came from the remote side, causing
the gateway state machine to go a little, to a use a technical term,
"wonky".
........

Merged revisions 403364 from http://svn.asterisk.org/svn/asterisk/branches/12

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@403365 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/res/res_pjsip_t38.c b/res/res_pjsip_t38.c
index 021fe4f..3c97784 100644 (file)
--- a/res/res_pjsip_t38.c
+++ b/res/res_pjsip_t38.c
@@ -113,11 +113,7 @@ static struct t38_parameters_task_data *t38_parameters_task_data_alloc(struct as
 
        data->session = session;
        ao2_ref(session, +1);
-
-       if (!(data->frame = ast_frdup(frame))) {
-               ao2_cleanup(data);
-               return NULL;
-       }
+       data->frame = frame;
 
        return data;
 }
@@ -396,6 +392,8 @@ static struct ast_frame *t38_framehook_write(struct ast_sip_session *session, st
                if (ast_sip_push_task(session->serializer, t38_interpret_parameters, data)) {
                        ao2_ref(data, -1);
                }
+
+               f = &ast_null_frame;
        } else if (f->frametype == AST_FRAME_MODEM) {
                RAII_VAR(struct ast_sip_session_media *, session_media, NULL, ao2_cleanup);