| /* |
| * 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_ |