sctp_transport_internal.h | Explore in Territory

/*
 *  Copyright (c) 2016 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.
 */

#ifndef MEDIA_SCTP_SCTP_TRANSPORT_INTERNAL_H_
#define MEDIA_SCTP_SCTP_TRANSPORT_INTERNAL_H_

// TODO(deadbeef): Move SCTP code out of media/, and make it not depend on
// anything in media/.

#include <memory>
#include <string>
#include <vector>

#include "api/priority.h"
#include "api/rtc_error.h"
#include "api/transport/data_channel_transport_interface.h"
#include "media/base/media_channel.h"
#include "p2p/base/packet_transport_internal.h"
#include "rtc_base/copy_on_write_buffer.h"
#include "rtc_base/thread.h"

namespace cricket {

// Constants that are important to API users
// The size of the SCTP association send buffer. 256kB, the usrsctp default.
constexpr int kSctpSendBufferSize = …;

// The number of outgoing streams that we'll negotiate. Since stream IDs (SIDs)
// are 0-based, the highest usable SID is 1023.
//
// It's recommended to use the maximum of 65535 in:
// https://tools.ietf.org/html/draft-ietf-rtcweb-data-channel-13#section-6.2
// However, we use 1024 in order to save memory. usrsctp allocates 104 bytes
// for each pair of incoming/outgoing streams (on a 64-bit system), so 65535
// streams would waste ~6MB.
//
// Note: "max" and "min" here are inclusive.
constexpr uint16_t kMaxSctpStreams = …;
constexpr uint16_t kMaxSctpSid = …;
constexpr uint16_t kMinSctpSid = …;
// The maximum number of streams that can be negotiated according to spec.
constexpr uint16_t kSpecMaxSctpSid = …;

// This is the default SCTP port to use. It is passed along the wire and the
// connectee and connector must be using the same port. It is not related to the
// ports at the IP level. (Corresponds to: sockaddr_conn.sconn_port in
// usrsctp.h)
const int kSctpDefaultPort = …;

// Error cause codes defined at
// https://www.iana.org/assignments/sctp-parameters/sctp-parameters.xhtml#sctp-parameters-24
enum class SctpErrorCauseCode : uint16_t { … };

// Abstract SctpTransport interface for use internally (by PeerConnection etc.).
// Exists to allow mock/fake SctpTransports to be created.
class SctpTransportInternal { … };

}  // namespace cricket

#endif  // MEDIA_SCTP_SCTP_TRANSPORT_INTERNAL_H_
chromium/third_party/webrtc/media/sctp/sctp_transport_internal.h
