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/*
Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Her Majesty the Queen in
Right of Canada (Communications Research Center Canada)
Copyright (C) 2017
Matthias P. Braendli, matthias.braendli@mpb.li
http://www.opendigitalradio.org
*/
/*
This file is part of ODR-DabMux.
ODR-DabMux 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-DabMux 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-DabMux. If not, see <http://www.gnu.org/licenses/>.
*/
#include "TcpSocket.h"
#include "Log.h"
#include <iostream>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <signal.h>
#include <stdint.h>
#include <poll.h>
using namespace std;
TcpSocket::TcpSocket() :
m_sock(INVALID_SOCKET)
{
}
TcpSocket::TcpSocket(int port, const string& name) :
m_sock(INVALID_SOCKET)
{
if (port) {
if ((m_sock = socket(PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) {
throw std::runtime_error("Can't create socket");
}
reuseopt_t reuse = 1;
if (setsockopt(m_sock, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse))
== SOCKET_ERROR) {
throw std::runtime_error("Can't reuse address");
}
#if defined(HAVE_SO_NOSIGPIPE)
int val = 1;
if (setsockopt(sd, SOL_SOCKET, SO_NOSIGPIPE, &val, sizeof(val))
== SOCKET_ERROR) {
throw std::runtime_error("Can't set SO_NOSIGPIPE");
}
#endif
m_own_address.setAddress(name);
m_own_address.setPort(port);
if (bind(m_sock, m_own_address.getAddress(), sizeof(sockaddr_in)) == SOCKET_ERROR) {
::close(m_sock);
m_sock = INVALID_SOCKET;
throw std::runtime_error("Can't bind socket");
}
}
}
TcpSocket::TcpSocket(SOCKET sock, InetAddress own, InetAddress remote) :
m_own_address(own),
m_remote_address(remote),
m_sock(sock) { }
// The move constructors must ensure the moved-from
// TcpSocket won't destroy our socket handle
TcpSocket::TcpSocket(TcpSocket&& other)
{
m_sock = other.m_sock;
other.m_sock = INVALID_SOCKET;
m_own_address = other.m_own_address;
m_remote_address = other.m_remote_address;
}
TcpSocket& TcpSocket::operator=(TcpSocket&& other)
{
m_sock = other.m_sock;
other.m_sock = INVALID_SOCKET;
m_own_address = other.m_own_address;
m_remote_address = other.m_remote_address;
return *this;
}
/**
* Close the underlying socket.
* @return 0 if ok
* -1 if error
*/
int TcpSocket::close()
{
if (m_sock != INVALID_SOCKET) {
int res = ::close(m_sock);
if (res != 0) {
setInetError("Can't close socket");
return -1;
}
m_sock = INVALID_SOCKET;
}
return 0;
}
TcpSocket::~TcpSocket()
{
close();
}
bool TcpSocket::isValid()
{
return m_sock != INVALID_SOCKET;
}
ssize_t TcpSocket::recv(void* data, size_t size)
{
ssize_t ret = ::recv(m_sock, (char*)data, size, 0);
if (ret == SOCKET_ERROR) {
stringstream ss;
ss << "TCP Socket recv error: " << strerror(errno);
throw std::runtime_error(ss.str());
}
return ret;
}
ssize_t TcpSocket::send(const void* data, size_t size, int timeout_ms)
{
if (timeout_ms) {
struct pollfd fds[1];
fds[0].fd = m_sock;
fds[0].events = POLLOUT;
int retval = poll(fds, 1, timeout_ms);
if (retval == -1) {
stringstream ss;
ss << "TCP Socket send error on poll(): " << strerror(errno);
throw std::runtime_error(ss.str());
}
else if (retval == 0) {
// Timed out
return 0;
}
}
/* On Linux, the MSG_NOSIGNAL flag ensures that the process would not
* receive a SIGPIPE and die.
* Other systems have SO_NOSIGPIPE set on the socket for the same effect. */
#if defined(HAVE_MSG_NOSIGNAL)
const int flags = MSG_NOSIGNAL;
#else
const int flags = 0;
#endif
ssize_t ret = ::send(m_sock, (const char*)data, size, flags);
if (ret == SOCKET_ERROR) {
stringstream ss;
ss << "TCP Socket send error: " << strerror(errno);
throw std::runtime_error(ss.str());
}
return ret;
}
void TcpSocket::listen()
{
if (::listen(m_sock, 1) == SOCKET_ERROR) {
stringstream ss;
ss << "TCP Socket listen error: " << strerror(errno);
throw std::runtime_error(ss.str());
}
}
TcpSocket TcpSocket::accept()
{
InetAddress remote_addr;
socklen_t addrLen = sizeof(sockaddr_in);
SOCKET socket = ::accept(m_sock, remote_addr.getAddress(), &addrLen);
if (socket == SOCKET_ERROR) {
stringstream ss;
ss << "TCP Socket accept error: " << strerror(errno);
throw std::runtime_error(ss.str());
}
else {
TcpSocket client(socket, m_own_address, remote_addr);
return client;
}
}
TcpSocket TcpSocket::accept(int timeout_ms)
{
struct pollfd fds[1];
fds[0].fd = m_sock;
fds[0].events = POLLIN | POLLOUT;
int retval = poll(fds, 1, timeout_ms);
if (retval == -1) {
stringstream ss;
ss << "TCP Socket accept error: " << strerror(errno);
throw std::runtime_error(ss.str());
}
else if (retval) {
return accept();
}
else {
TcpSocket invalidsock(0, "");
return invalidsock;
}
}
InetAddress TcpSocket::getOwnAddress() const
{
return m_own_address;
}
InetAddress TcpSocket::getRemoteAddress() const
{
return m_remote_address;
}
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