res_pjsip_t38.c: Be smarter about how we respond when T.38 is disabled.
We were blindly responding with AST_T38_REFUSED when ANY T.38 control frame came accross the bridge. This causes T.38 Gateway to get confused and the T.38 session to get in a strange state. * Made the T.38 framehook only respond to request frames and ignore response frames. ASTERISK-27657 ASTERISK-27080 Change-Id: I5fb5967c7d1efb30a7ff375f82887ca82a55b05b
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@ -507,21 +507,42 @@ static struct ast_frame *t38_framehook(struct ast_channel *chan, struct ast_fram
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return f;
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}
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if (f->frametype == AST_FRAME_CONTROL && f->subclass.integer == AST_CONTROL_T38_PARAMETERS) {
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if (f->frametype == AST_FRAME_CONTROL
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&& f->subclass.integer == AST_CONTROL_T38_PARAMETERS) {
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if (channel->session->endpoint->media.t38.enabled) {
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struct t38_parameters_task_data *data = t38_parameters_task_data_alloc(channel->session, f);
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struct t38_parameters_task_data *data;
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if (!data) {
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return f;
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}
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if (ast_sip_push_task(channel->session->serializer, t38_interpret_parameters, data)) {
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data = t38_parameters_task_data_alloc(channel->session, f);
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if (data
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&& ast_sip_push_task(channel->session->serializer,
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t38_interpret_parameters, data)) {
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ao2_ref(data, -1);
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}
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} else {
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struct ast_control_t38_parameters parameters = { .request_response = AST_T38_REFUSED, };
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ast_debug(2, "T.38 support not enabled, rejecting T.38 control packet\n");
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ast_queue_control_data(chan, AST_CONTROL_T38_PARAMETERS, ¶meters, sizeof(parameters));
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static const struct ast_control_t38_parameters rsp_refused = {
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.request_response = AST_T38_REFUSED,
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};
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static const struct ast_control_t38_parameters rsp_terminated = {
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.request_response = AST_T38_TERMINATED,
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};
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const struct ast_control_t38_parameters *parameters = f->data.ptr;
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switch (parameters->request_response) {
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case AST_T38_REQUEST_NEGOTIATE:
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ast_debug(2, "T.38 support not enabled on %s, refusing T.38 negotiation\n",
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ast_channel_name(chan));
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ast_queue_control_data(chan, AST_CONTROL_T38_PARAMETERS,
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&rsp_refused, sizeof(rsp_refused));
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break;
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case AST_T38_REQUEST_TERMINATE:
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ast_debug(2, "T.38 support not enabled on %s, 'terminating' T.38 session\n",
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ast_channel_name(chan));
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ast_queue_control_data(chan, AST_CONTROL_T38_PARAMETERS,
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&rsp_terminated, sizeof(rsp_terminated));
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break;
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default:
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break;
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}
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}
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}
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