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/*
* Copyright 2019 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "pc/sctp_data_channel_transport.h"
#include "absl/types/optional.h"
#include "pc/sctp_utils.h"
namespace webrtc {
SctpDataChannelTransport::SctpDataChannelTransport(
cricket::SctpTransportInternal* sctp_transport)
: sctp_transport_(sctp_transport) {
sctp_transport_->SignalReadyToSendData.connect(
this, &SctpDataChannelTransport::OnReadyToSendData);
sctp_transport_->SignalDataReceived.connect(
this, &SctpDataChannelTransport::OnDataReceived);
sctp_transport_->SignalClosingProcedureStartedRemotely.connect(
this, &SctpDataChannelTransport::OnClosingProcedureStartedRemotely);
sctp_transport_->SignalClosingProcedureComplete.connect(
this, &SctpDataChannelTransport::OnClosingProcedureComplete);
sctp_transport_->SignalClosedAbruptly.connect(
this, &SctpDataChannelTransport::OnClosedAbruptly);
}
RTCError SctpDataChannelTransport::OpenChannel(int channel_id) {
sctp_transport_->OpenStream(channel_id);
return RTCError::OK();
}
RTCError SctpDataChannelTransport::SendData(
int channel_id,
const SendDataParams& params,
const rtc::CopyOnWriteBuffer& buffer) {
// Map webrtc::SendDataParams to cricket::SendDataParams.
// TODO(mellem): See about unifying these structs.
cricket::SendDataParams sd_params;
sd_params.sid = channel_id;
sd_params.type = ToCricketDataMessageType(params.type);
sd_params.ordered = params.ordered;
sd_params.reliable = !(params.max_rtx_count || params.max_rtx_ms);
sd_params.max_rtx_count = params.max_rtx_count.value_or(-1);
sd_params.max_rtx_ms = params.max_rtx_ms.value_or(-1);
cricket::SendDataResult result;
sctp_transport_->SendData(sd_params, buffer, &result);
// TODO(mellem): See about changing the interfaces to not require mapping
// SendDataResult to RTCError and back again.
switch (result) {
case cricket::SendDataResult::SDR_SUCCESS:
return RTCError::OK();
case cricket::SendDataResult::SDR_BLOCK: {
// Send buffer is full.
ready_to_send_ = false;
return RTCError(RTCErrorType::RESOURCE_EXHAUSTED);
}
case cricket::SendDataResult::SDR_ERROR:
return RTCError(RTCErrorType::NETWORK_ERROR);
}
return RTCError(RTCErrorType::NETWORK_ERROR);
}
RTCError SctpDataChannelTransport::CloseChannel(int channel_id) {
sctp_transport_->ResetStream(channel_id);
return RTCError::OK();
}
void SctpDataChannelTransport::SetDataSink(DataChannelSink* sink) {
sink_ = sink;
if (sink_ && ready_to_send_) {
sink_->OnReadyToSend();
}
}
bool SctpDataChannelTransport::IsReadyToSend() const {
return ready_to_send_;
}
void SctpDataChannelTransport::OnReadyToSendData() {
ready_to_send_ = true;
if (sink_) {
sink_->OnReadyToSend();
}
}
void SctpDataChannelTransport::OnDataReceived(
const cricket::ReceiveDataParams& params,
const rtc::CopyOnWriteBuffer& buffer) {
if (sink_) {
sink_->OnDataReceived(params.sid, ToWebrtcDataMessageType(params.type),
buffer);
}
}
void SctpDataChannelTransport::OnClosingProcedureStartedRemotely(
int channel_id) {
if (sink_) {
sink_->OnChannelClosing(channel_id);
}
}
void SctpDataChannelTransport::OnClosingProcedureComplete(int channel_id) {
if (sink_) {
sink_->OnChannelClosed(channel_id);
}
}
void SctpDataChannelTransport::OnClosedAbruptly() {
if (sink_) {
sink_->OnTransportClosed();
}
}
} // namespace webrtc
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