67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
/*
|
|
* Copyright (c) 2021 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 NET_DCSCTP_SOCKET_CONTEXT_H_
|
|
#define NET_DCSCTP_SOCKET_CONTEXT_H_
|
|
|
|
#include <cstdint>
|
|
|
|
#include "absl/strings/string_view.h"
|
|
#include "net/dcsctp/common/internal_types.h"
|
|
#include "net/dcsctp/packet/sctp_packet.h"
|
|
#include "net/dcsctp/public/dcsctp_socket.h"
|
|
#include "net/dcsctp/public/types.h"
|
|
|
|
namespace dcsctp {
|
|
|
|
// A set of helper methods used by handlers to e.g. send packets.
|
|
//
|
|
// Implemented by the TransmissionControlBlock.
|
|
class Context {
|
|
public:
|
|
virtual ~Context() = default;
|
|
|
|
// Indicates if a connection has been established.
|
|
virtual bool is_connection_established() const = 0;
|
|
|
|
// Returns this side's initial TSN value.
|
|
virtual TSN my_initial_tsn() const = 0;
|
|
|
|
// Returns the peer's initial TSN value.
|
|
virtual TSN peer_initial_tsn() const = 0;
|
|
|
|
// Returns the socket callbacks.
|
|
virtual DcSctpSocketCallbacks& callbacks() const = 0;
|
|
|
|
// Observes a measured RTT value, in milliseconds.
|
|
virtual void ObserveRTT(DurationMs rtt_ms) = 0;
|
|
|
|
// Returns the current Retransmission Timeout (rto) value, in milliseconds.
|
|
virtual DurationMs current_rto() const = 0;
|
|
|
|
// Increments the transmission error counter, given a human readable reason.
|
|
virtual bool IncrementTxErrorCounter(absl::string_view reason) = 0;
|
|
|
|
// Clears the transmission error counter.
|
|
virtual void ClearTxErrorCounter() = 0;
|
|
|
|
// Returns true if there have been too many retransmission errors.
|
|
virtual bool HasTooManyTxErrors() const = 0;
|
|
|
|
// Returns a PacketBuilder, filled in with the correct verification tag.
|
|
virtual SctpPacket::Builder PacketBuilder() const = 0;
|
|
|
|
// Builds the packet from `builder` and sends it.
|
|
virtual void Send(SctpPacket::Builder& builder) = 0;
|
|
};
|
|
|
|
} // namespace dcsctp
|
|
|
|
#endif // NET_DCSCTP_SOCKET_CONTEXT_H_
|