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/*
Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Her Majesty the
Queen in Right of Canada (Communications Research Center Canada)
Copyright (C) 2018
Matthias P. Braendli, matthias.braendli@mpb.li
http://opendigitalradio.org
DESCRIPTION:
Abstraction for sockets.
*/
/*
This file is part of ODR-DabMod.
ODR-DabMod is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
ODR-DabMod is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with ODR-DabMod. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdexcept>
#include <string>
#include <cstdint>
#include <cstring>
#include <unistd.h>
#include <errno.h>
#include <poll.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
class TCPSocket {
public:
TCPSocket();
~TCPSocket();
TCPSocket(const TCPSocket& other) = delete;
TCPSocket& operator=(const TCPSocket& other) = delete;
TCPSocket(TCPSocket&& other);
TCPSocket& operator=(TCPSocket&& other);
bool valid(void) const;
void connect(const std::string& hostname, int port);
void listen(int port);
void close(void);
/* throws a runtime_error on failure, an invalid socket on timeout */
TCPSocket accept_with_timeout(int timeout_ms, struct sockaddr_in *client);
/* returns -1 on error */
ssize_t sendall(const void *buffer, size_t buflen);
/* Returns number of bytes read, 0 on disconnect. Throws a
* runtime_error on error */
ssize_t recv(void *buffer, size_t length, int flags);
class Timeout {};
class Interrupted {};
/* Returns number of bytes read, 0 on disconnect or refused connection.
* Throws a Timeout on timeout, Interrupted on EINTR, a runtime_error
* on error
*/
ssize_t recv(void *buffer, size_t length, int flags, int timeout_ms);
private:
explicit TCPSocket(int sockfd);
int m_sock = -1;
friend class TCPClient;
};
/* Implement a TCP receiver that auto-reconnects on errors */
class TCPClient {
public:
void connect(const std::string& hostname, int port);
/* Returns numer of bytes read, 0 on auto-reconnect, -1
* on interruption.
* Throws a runtime_error on error */
ssize_t recv(void *buffer, size_t length, int flags, int timeout_ms);
private:
void reconnect(void);
TCPSocket m_sock;
std::string m_hostname;
int m_port;
};
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