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TCPClientc.cpp
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TCPClientc.cpp
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#include "TCPClient.h"
ostream& operator<<(ostream& os, TCPClient& tcp)
{
os << tcp.info;
return os;
}
TCPClient::TCPClient(string port, string host)
{
TCPConnect(port, host);
}
TCPClient::~TCPClient()
{
TCPDisconnect();
}
void TCPClient::readSocket()
{
info = "";
try
{
const int BUFF_SIZE = 512;
char recvbuf[BUFF_SIZE];
int res;
// Receive data until all current data is recieved (buffer is not full)
do {
res = recv(TCPSock, recvbuf, BUFF_SIZE, 0);
if (res > 0)
{
for(int i = 0; i<res; ++i)
{
info += recvbuf[i];
}
}
else if (res == 0)
{
cout << "Connection closed" << endl;
}
else
{
cout << "Receive failed: " << WSAGetLastError() << endl;
}
} while (res == BUFF_SIZE);
}
catch(exception e)
{
cout << "Read Error: " << e.what() << endl;
}
}
void TCPClient::writeSocket(string writeStr)
{
try
{
int res = send(TCPSock, writeStr.c_str(), writeStr.length(), 0);
if (res == SOCKET_ERROR) {
std::cout << "Write failed: " << WSAGetLastError() << endl;
TCPDisconnect();
}
std::cout << writeStr;
}
catch(exception e)
{
cout << "Write Error: " << e.what() << endl;
}
}
void TCPClient::TCPConnect(string port, string host)
{
// initiate use of WS2_32.dll.
WSADATA wsaData;
int res = WSAStartup(MAKEWORD(2,2), &wsaData);
if(res !=0)
{
cout << "Could not initiate WS2_32.dll" << endl;
}
// initialize address information
struct addrinfo *result = NULL,
*ptr = NULL,
hints;
ZeroMemory( &hints, sizeof(hints) );
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
// Resolve the server address and port
res = getaddrinfo(host.c_str(), port.c_str(), &hints, &result);
if (res != 0) {
cout << "getaddrinfo failed" << endl;
WSACleanup();
}
TCPSock = INVALID_SOCKET;
// Attempt to connect to the first address returned by
// the call to getaddrinfo
ptr=result;
// Create a SOCKET for connecting to server
TCPSock = socket(ptr->ai_family, ptr->ai_socktype, ptr->ai_protocol);
if (TCPSock == INVALID_SOCKET) {
cout << "Could not create socket." << endl;
freeaddrinfo(result);
WSACleanup();
}
// Connect to server.
res = connect(TCPSock, ptr->ai_addr, (int)ptr->ai_addrlen);
if (res == SOCKET_ERROR) {
closesocket(TCPSock);
TCPSock = INVALID_SOCKET;
}
// Should really try the next address returned by getaddrinfo
// if the connect call failed
freeaddrinfo(result);
if (TCPSock == INVALID_SOCKET) {
cout << "Unable to connect to server!" << endl;
WSACleanup();
}
}
void TCPClient::TCPDisconnect()
{
closesocket(TCPSock);
WSACleanup();
}