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Tcp-Example.cpp
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Tcp-Example.cpp
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/* Copyright (C) 2016-2019 Thomas Hauck - All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
The author would be happy if changes and
improvements were reported back to him.
Author: Thomas Hauck
Email: Thomas@fam-hauck.de
*/
#include <thread>
#include <sstream>
#include <iomanip>
#include <iostream>
#define WITHOUT_OPENSSL
#include "SocketLib/SocketLib.h"
using namespace std;
#if defined (_WIN32) || defined (_WIN64)
#include <conio.h>
#else // Linux
#include <termios.h>
void _getch()
{
struct termios t;
tcgetattr(fileno(stdin), &t);
t.c_lflag &= ~ICANON;
tcsetattr(fileno(stdin), TCSANOW, &t);
getchar();
t.c_lflag |= ICANON;
tcsetattr(fileno(stdin), TCSANOW, &t);
}
#endif
void ServerThread(const bool* bStop)
{
TcpServer sock;
// 3 callback function to handle the server socket events
sock.BindErrorFunction([&](BaseSocket* pSock) { cout << "Server: socket error" << endl; pSock->Close(); }); // Must call Close function
sock.BindCloseFunction([&](BaseSocket*) { cout << "Server: socket closing" << endl; });
sock.BindNewConnection([&](const vector<TcpSocket*>& lstSockets)
{
// a list with sockets how connected
for (auto& pSocket : lstSockets)
{
if (pSocket != nullptr)
{
// 3 callback functions to handle the sockets events
pSocket->BindFuncBytesReceived([&](TcpSocket* pSock)
{
const size_t nAvalible = pSock->GetBytesAvailable();
if (nAvalible == 0) // Socket closed on remote
{
pSock->Close();
return;
}
auto spBuffer = make_unique<uint8_t[]>(nAvalible + 1);
const size_t nRead = pSock->Read(&spBuffer[0], nAvalible);
if (nRead > 0)
{
string strRec(nRead, 0);
copy(&spBuffer[0], &spBuffer[nRead], &strRec[0]);
stringstream strOutput;
strOutput << pSock->GetClientAddr() << " - Server received: " << nRead << " Bytes, \"" << strRec << "\"" << endl;
cout << strOutput.str();
strRec = "Server echo: " + strRec;
pSock->Write(&strRec[0], strRec.size());
//pSock->Close(); // Optional, if you don't close the socket, the connection stays open
}
});
pSocket->BindErrorFunction([&](BaseSocket* pSock)
{
// there was an error, we close the socket
pSock->Close();
cout << "Server: accept socket error" << endl;
});
pSocket->BindCloseFunction([&](BaseSocket* pSock)
{
cout << "Server: accept socket closing" << endl;
});
pSocket->StartReceiving(); // start to receive data
pSocket->Write("Server Hello Message", 20);
}
}
});
// start der server socket
const bool bCreated = sock.Start("0.0.0.0", 3461); // IPv6 use "::1" as address
while (*bStop == false)
{
this_thread::sleep_for(chrono::milliseconds(10));
}
// Closing the server socket will not call the close callback
sock.Close();
}
void ClientThread(const bool* bStop)
{
TcpSocket sock;
bool bIsClosed = false;
// client socket has 4 callback function
sock.BindErrorFunction([&](BaseSocket* pSock) { cout << "Client: socket error" << endl; pSock->Close(); }); // Must call Close function
sock.BindCloseFunction([&](BaseSocket*) { cout << "Client: socket closing" << endl; bIsClosed = true; });
sock.BindFuncBytesReceived([&](TcpSocket* pTcpSocket)
{
const size_t nAvalible = pTcpSocket->GetBytesAvailable();
if (nAvalible == 0) // Socket closed on remote
{
pTcpSocket->Close();
return;
}
auto spBuffer = make_unique<uint8_t[]>(nAvalible + 1);
const size_t nRead = pTcpSocket->Read(&spBuffer[0], nAvalible);
if (nRead > 0)
{
string strRec(nRead, 0);
copy(&spBuffer[0], &spBuffer[nRead], &strRec[0]);
stringstream strOutput;
strOutput << pTcpSocket->GetClientAddr() << " - Client received: " << nRead << " Bytes, \"" << strRec << "\"" << endl;
cout << strOutput.str();
}
});
sock.BindFuncConEstablished([&](TcpSocket* pTcpSocket)
{
pTcpSocket->Write("Hallo World", 11);
});
const bool bConnected = sock.Connect("127.0.0.1", 3461);
if (bConnected == false)
cout << "error creating client socket" << endl;
while (*bStop == false)
{
this_thread::sleep_for(chrono::milliseconds(10));
}
// The Close call will call the Callback function above
// but if we leave the thread, the Instance is destroyed
// and we crash. So we disable the Callback by setting a null pointer
if (bIsClosed == false)
{
//sock.BindCloseFunction(static_cast<function<void(BaseSocket*)>>(nullptr)); // We need the casting , because
sock.Close();
// Alternativ, we wait until the callback above was called
while (bIsClosed == false)
this_thread::sleep_for(chrono::milliseconds(10));
}
}
int main(int argc, const char* argv[])
{
#if defined(_WIN32) || defined(_WIN64)
// Detect Memory Leaks
_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF | _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG));
#endif
bool bStop = false;
thread thServer = thread(bind(ServerThread, &bStop));
// we wait a second so the server is ready
this_thread::sleep_for(chrono::milliseconds(1000));
thread thClient = thread(bind(ClientThread, &bStop));
_getch();
bStop = true;
thServer.join();
thClient.join();
return 0;
}