77 lines
3.0 KiB
C++
77 lines
3.0 KiB
C++
/*
|
|
* Copyright (C) 2015 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef ADB_IO_H
|
|
#define ADB_IO_H
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <string>
|
|
|
|
// Sends the protocol "OKAY" message.
|
|
bool SendOkay(int fd);
|
|
|
|
// Sends the protocol "FAIL" message, with the given failure reason.
|
|
bool SendFail(int fd, const std::string& reason);
|
|
|
|
// Writes a protocol-format string; a four hex digit length followed by the string data.
|
|
bool SendProtocolString(int fd, const std::string& s);
|
|
|
|
// Reads a protocol-format string; a four hex digit length followed by the string data.
|
|
bool ReadProtocolString(int fd, std::string* s, std::string* error);
|
|
|
|
// Reads exactly len bytes from fd into buf.
|
|
//
|
|
// Returns false if there is an error or if EOF was reached before len bytes
|
|
// were read. If EOF was found, errno will be set to 0.
|
|
//
|
|
// If this function fails, the contents of buf are undefined.
|
|
bool ReadFdExactly(int fd, void* buf, size_t len);
|
|
|
|
// Given a client socket, wait for orderly/graceful shutdown. Call this:
|
|
//
|
|
// * Before closing a client socket.
|
|
// * Only when no more data is expected to come in.
|
|
// * Only when the server is not waiting for data from the client (because then
|
|
// the client and server will deadlock waiting for each other).
|
|
// * Only when the server is expected to close its socket right now.
|
|
// * Don't call shutdown(SHUT_WR) before calling this because that will shutdown
|
|
// the client socket early, defeating the purpose of calling this.
|
|
//
|
|
// Waiting for orderly/graceful shutdown of the server socket will cause the
|
|
// server socket to close before the client socket. That prevents the client
|
|
// socket from staying in TIME_WAIT which eventually causes subsequent
|
|
// connect()s from the client to fail with WSAEADDRINUSE on Windows.
|
|
// Returns true if it is sure that orderly/graceful shutdown has occurred with
|
|
// no additional data read from the server.
|
|
bool ReadOrderlyShutdown(int fd);
|
|
|
|
// Writes exactly len bytes from buf to fd.
|
|
//
|
|
// Returns false if there is an error or if the fd was closed before the write
|
|
// completed. If the other end of the fd (such as in a socket, pipe, or fifo),
|
|
// is closed, errno will be set to 0.
|
|
bool WriteFdExactly(int fd, const void* buf, size_t len);
|
|
|
|
// Same as above, but for strings.
|
|
bool WriteFdExactly(int fd, const char* s);
|
|
bool WriteFdExactly(int fd, const std::string& s);
|
|
|
|
// Same as above, but formats the string to send.
|
|
bool WriteFdFmt(int fd, const char* fmt, ...) __attribute__((__format__(__printf__, 2, 3)));
|
|
|
|
#endif /* ADB_IO_H */
|