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// Connection.cpp
// Interfaces to the cConnection class representing a single pair of connected sockets
#include "Globals.h"
#include "Connection.h"
#include "Server.h"
cConnection::cConnection(SOCKET a_ClientSocket, cServer & a_Server) :
m_Server(a_Server),
m_LogFile(NULL),
m_ClientSocket(a_ClientSocket),
m_ServerSocket(-1),
m_BeginTick(clock())
{
AString fnam;
Printf(fnam, "Log_%d.log", (int)time(NULL));
m_LogFile = fopen(fnam.c_str(), "w");
Log("Log file created");
}
cConnection::~cConnection()
{
fclose(m_LogFile);
}
void cConnection::Run(void)
{
if (!ConnectToServer())
{
Log("Cannot connect to server; aborting");
return;
}
while (true)
{
fd_set ReadFDs;
FD_ZERO(&ReadFDs);
FD_SET(m_ServerSocket, &ReadFDs);
FD_SET(m_ClientSocket, &ReadFDs);
int res = select(2, &ReadFDs, NULL, NULL, NULL);
if (res <= 0)
{
printf("select() failed: %d; aborting client", WSAGetLastError());
return;
}
if (FD_ISSET(m_ServerSocket, &ReadFDs))
{
if (!RelayFromServer())
{
return;
}
}
if (FD_ISSET(m_ClientSocket, &ReadFDs))
{
if (!RelayFromClient())
{
return;
}
}
}
}
void cConnection::Log(const char * a_Format, ...)
{
va_list args;
va_start(args, a_Format);
AString msg;
AppendVPrintf(msg, a_Format, args);
va_end(args);
AString FullMsg;
Printf(FullMsg, "[%5.3f] %s\n", GetRelativeTime(), msg.c_str());
cCSLock Lock(m_CSLog);
fputs(FullMsg.c_str(), m_LogFile);
}
void cConnection::DataLog(const void * a_Data, int a_Size, const char * a_Format, ...)
{
va_list args;
va_start(args, a_Format);
AString msg;
AppendVPrintf(msg, a_Format, args);
va_end(args);
AString FullMsg;
AString Hex;
Printf(FullMsg, "[%5.3f] %s\n%s", GetRelativeTime(), msg.c_str(), CreateHexDump(Hex, a_Data, a_Size, 16).c_str());
cCSLock Lock(m_CSLog);
fputs(FullMsg.c_str(), m_LogFile);
}
bool cConnection::ConnectToServer(void)
{
m_ServerSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (m_ServerSocket == INVALID_SOCKET)
{
return false;
}
sockaddr_in localhost;
localhost.sin_family = AF_INET;
localhost.sin_port = htons(m_Server.GetConnectPort());
localhost.sin_addr.s_addr = htonl(0x7f000001); // localhost
if (connect(m_ServerSocket, (sockaddr *)&localhost, sizeof(localhost)) != 0)
{
printf("connection to server failed: %d\n", WSAGetLastError());
return false;
}
return true;
}
bool cConnection::RelayFromServer(void)
{
char Buffer[1024];
int res = recv(m_ServerSocket, Buffer, sizeof(Buffer), 0);
if (res <= 0)
{
Log("Server closed the socket: %d; %d; aborting connection", res, WSAGetLastError());
return false;
}
DataLog(Buffer, res, "Received %d bytes from the server", res);
// TODO: Process the data
res = send(m_ClientSocket, Buffer, res, 0);
if (res <= 0)
{
Log("Client closed the socket: %d, %d; aborting connection", res, WSAGetLastError());
return false;
}
return true;
}
bool cConnection::RelayFromClient(void)
{
char Buffer[1024];
int res = recv(m_ClientSocket, Buffer, sizeof(Buffer), 0);
if (res <= 0)
{
Log("Client closed the socket: %d; %d; aborting connection", res, WSAGetLastError());
return false;
}
DataLog(Buffer, res, "Received %d bytes from the client", res);
// TODO: Process the data
res = send(m_ServerSocket, Buffer, res, 0);
if (res <= 0)
{
Log("Server closed the socket: %d, %d; aborting connection", res, WSAGetLastError());
return false;
}
return true;
}
double cConnection::GetRelativeTime(void)
{
return (double)(clock() - m_BeginTick) / CLOCKS_PER_SEC;
}
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