| // Copyright 2022 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef QUICHE_QUIC_CORE_IO_STREAM_CLIENT_SOCKET_H_ |
| #define QUICHE_QUIC_CORE_IO_STREAM_CLIENT_SOCKET_H_ |
| |
| #include "absl/status/status.h" |
| #include "quiche/quic/core/io/socket.h" |
| #include "quiche/common/platform/api/quiche_export.h" |
| |
| namespace quic { |
| |
| // A client socket using a protocol (typically TCP) that provides |
| // connection-based streams. |
| // |
| // Must not destroy a connected/connecting socket. If connected or connecting, |
| // must call Disconnect() to disconnect or cancel the connection before |
| // destruction. |
| // |
| // Warning regarding blocking calls: Code in the QUICHE library typically |
| // handles IO on a single thread, so if making calls from that typical |
| // environment, it would be problematic to make a blocking call and block that |
| // single thread. |
| class QUICHE_EXPORT_PRIVATE StreamClientSocket : public Socket { |
| public: |
| class AsyncVisitor : public Socket::AsyncVisitor { |
| public: |
| virtual void ConnectComplete(absl::Status status) = 0; |
| }; |
| |
| ~StreamClientSocket() override = default; |
| |
| // Establishes a connection synchronously. Should not be called if socket has |
| // already been successfully connected without first calling Disconnect(). |
| virtual absl::Status ConnectBlocking() = 0; |
| |
| // Establishes a connection asynchronously. On completion, calls |
| // ConnectComplete() on the visitor, potentially before return from |
| // ConnectAsync(). Should not be called if socket has already been |
| // successfully connected without first calling Disconnect(). |
| // |
| // After calling, the socket must not be destroyed until Disconnect() is |
| // called. |
| virtual void ConnectAsync() = 0; |
| |
| // Disconnects a connected socket or cancels an in-progress ConnectAsync(), |
| // invoking the `ConnectComplete(absl::CancelledError())` on the visitor. |
| // After success, it is possible to call ConnectBlocking() or ConnectAsync() |
| // again to establish a new connection. Cancels any pending read or write |
| // operations, calling visitor completion methods with |
| // `absl::CancelledError()`. |
| // |
| // Typically implemented via a call to ::close(), which for TCP can result in |
| // either FIN or RST, depending on socket/platform state and undefined |
| // platform behavior. |
| virtual void Disconnect() = 0; |
| }; |
| |
| } // namespace quic |
| |
| #endif // QUICHE_QUIC_CORE_IO_STREAM_CLIENT_SOCKET_H_ |