ListenSocket.h
// class does not contain WSASTARTUP () and WSACLEANUP ()
#ifndef LISTENTHREAD_H
#define LISTENTHREAD_H
#include "includes.h"
#include "LOGMSGs.h"
// 1, CListenSocket: class is used to create the listener thread local variable.
// This class can be reused. When you call Close () is closed, re-calling Open () the new listening port. But the system did not use the feature.
class CListenSocket
{
public:
// main method:
// BIND each object only to a port.
CListenSocket(u_short nPort, int nSndSize = 0);
// to release SOCKET
~CListenSocket(){};
// Create server listening SOCKET, specific options see the code. Fails to return false.
bool Open(); // call can be repeated
// error return INVALID_SOCKET
SOCKET Accept(u_long & nClientIP);
// repeated calls. Usually not, can be used to take the initiative to close the SOCKET.
// close the re-call after Open () re-use the object.
void Close(); // call can be repeated
bool IsOpen() { return m_bState; }
bool Rebuild();
public:
SOCKET Socket() { return m_sockListen; }
protected:
// main member variables:
const u_short m_nPort;
const int m_nSndBuf;
SOCKET m_sockListen;
// network status is normal sign.
// When the value is false that the object is not available. May not have Open (), may also be a network error.
bool m_bState;
time_t m_tCloseTime; // SOCKET last closed the time delay for the automatic re-SOCKET
};
#endif // LISTENTHREAD_H
ListenSocket.cpp
#include "ListenSocket.h"
long s_nSocketCount = 0;
int REBUILDLISTENDELAYSEC;
CListenSocket::CListenSocket(u_short nPort, int nSndBuf /*= 0*/) // 0: Default
: m_nPort(nPort), m_nSndBuf(nSndBuf)
{
m_sockListen = INVALID_SOCKET;
m_bState = false;
// m_nPort = nPort;
m_tCloseTime = 0;
}
// Error returned INVALID_SOCKET
SOCKET CListenSocket::Accept(u_long & nClientIP)
{
/*
// Reconstruction SOCKET
if(!m_bState)
{
if(clock() < m_tCloseTime + REBUILDLISTENDELAYSEC*CLOCKS_PER_SEC)
return INVALID_SOCKET;
else
{
LOGMSG("Anti-crash system start listening SOCKET [%d] re under construction...", m_nPort);
if(Open())
{
LOGMSG("... listen SOCKET reconstruction success.");
PrintText("Listen SOCKET [%d] failed to rebuild SOCKET success. Server continues to run in the ...", m_nPort);
}
else
{
Error("... listen SOCKET reconstruction has failed. Server will not accept new connections");
PrintText("Listen SOCKET [%d] error, [%d] seconds after the re-SOCKET. Server continues to run in the ...", m_nPort, REBUILDLISTENDELAYSEC); // nDelaySec);
}
m_tCloseTime = clock();
}
}
//*/
if(!m_bState)
{
Error("ACCEPT inner exception a1");
return INVALID_SOCKET;
}
// ACCEPT
struct sockaddr_in addr;
memset(&addr, 0, sizeof(addr));
int len = sizeof(addr);
SOCKET newsock = accept(m_sockListen, (sockaddr*)&addr, (int*)&len); // receive to the other side of the map, you can use
#ifdef PROFILE_X
// Analysis Accept speed (cycle speed)
const int nTimes2 = ACCEPTPROFILESEC; // Statistics once every 30 seconds the speed ACCEPT
static clock_t tNextTime2 = clock() + nTimes2 * CLOCKS_PER_SEC; //? Only one monitor thread, no sharing violation
static long nCount2 = 0; //? Only one monitor thread, no sharing violation
if(clock() >= tNextTime2)
{
PrintText("Each [%d] seconds to execute a [%d] times Accept ()", nTimes2, InterlockedExchange(&nCount2, 0));
tNextTime2 = clock() + nTimes2 * CLOCKS_PER_SEC;
}
else
{
InterlockedIncrement(&nCount2);
}
#endif // PROFILE
if(newsock == INVALID_SOCKET)
{
// Network Error
int err = WSAGetLastError();
if(err != WSAEWOULDBLOCK)
{
PrintText("Listen SOCKET %d failed, %s seconds after the re-SOCKET.", m_nPort, REBUILDLISTENDELAYSEC);
Error("Listen SOCKET [%d] failed [%d], [%s] seconds after the re-SOCKET.", m_nPort, err, REBUILDLISTENDELAYSEC);
Close();
}
else
Error("ACCEPT inner exception a2");
return INVALID_SOCKET;
}
else
{
nClientIP = addr.sin_addr.S_un.S_addr;
InterlockedIncrement(&s_nSocketCount);
}
// Check whether the SOCKET closed
fd_set readmask;
FD_ZERO(&readmask);
FD_SET(newsock, &readmask);
struct timeval timeout = {0, 0};
/*
char nTemp;
if(select(FD_SETSIZE, &readmask, (fd_set *) 0, (fd_set *) 0, &timeout)
&& recv(newsock, &nTemp, 1, MSG_PEEK) == 0)
{
#ifdef ALPHA_X
LOGMSG("ACCEPT a new SOCKET is invalid .");
#endif
closesocket(newsock);
InterlockedDecrement(&s_nSocketCount);
return INVALID_SOCKET;
}
//else*/
//*
fd_set exceptmask;
FD_ZERO(&exceptmask);
FD_SET(newsock, &exceptmask);
int ret = select(FD_SETSIZE, &readmask, (fd_set *) 0, (fd_set *) &exceptmask, &timeout);
if(ret < 0)
{
Error("ACCEPT a new SOCKET is invalid . can't read"); // Not trigger
closesocket(newsock);
InterlockedDecrement(&s_nSocketCount);
return INVALID_SOCKET;
}
else if(ret > 0)
{
if(FD_ISSET(newsock, &exceptmask))
{
LOGMSG("ACCEPT a new SOCKET is invalid.except"); // Not trigger
closesocket(newsock);
InterlockedDecrement(&s_nSocketCount);
return INVALID_SOCKET;
}
else if(FD_ISSET(newsock, &readmask))
{
char nTemp;
if(recv(newsock, &nTemp, 1, MSG_PEEK) == 0)
{
#ifdef ALPHA_X
LOGMSG("ACCEPT a new SOCKET is invalid. recv==0"); // Not trigger
#endif
closesocket(newsock);
InterlockedDecrement(&s_nSocketCount);
return INVALID_SOCKET;
}
}
}
//*/
#ifdef PROFILE_X
// analysis Accept speed (received valid SOCKET)
const int nTimes = ACCEPTPROFILESEC; // Statistics once every 10 seconds the speed ACCEPT
static clock_t tNextTime = clock() + nTimes * CLOCKS_PER_SEC; //? Only one monitor thread, no sharing violation
static long nCount = 0; //? Only one monitor thread, no sharing violation
if(clock() >= tNextTime)
{
LOGPROFILE("Port [%d] for every [%d] seconds, the successful implementation of the [%d] times Accept()",
m_nPort, nTimes, InterlockedExchange(&nCount, 0));
tNextTime = clock() + nTimes * CLOCKS_PER_SEC;
}
else
{
InterlockedIncrement(&nCount);
}
#endif // PROFILE
return newsock;
}
Main.cpp的
#include "includes.h"
#include "IniFile.h"
#include "LOGMSGs.h"
#include "ListenSocket.h"
CListenSocket Sock(9985);
int main()
{
Sock.Open();
if(!Sock.Open())
{
Sock.Rebuild();
}
if(Sock.IsOpen())
PrintText("okey");
Sock.Socket();
u_long ip;
Sock.Accept(ip);
}
但是我总是遇到这个错误：接受内部异常a2而它应该工作任何线索为什么？
答案 0 :(得分：0)
CListenSocket Sock(9985);
int main()
{
Sock.Open();
if(!Sock.Open())
/* I think you meant 'IsOpen()' */
{
Sock.Rebuild();
}
if(Sock.IsOpen())
PrintText("okey");
Sock.Socket();
u_long ip;
Sock.Accept(ip);
}
顺便提一下，这段代码确实读取搞笑。感觉就像一个没有特定目标的通用工具包。也许我错过了它，但是如果你只是编写了实际上需要的网络代码，那么我必须认为你会得到更好的结果，然后将公共位抽象成一些辅助例程。尝试制作全能和最终所有网络助手库是没有意义的，但制作可以摧毁常见案例的工具有很大的意义。
如果你知道你在做什么，请随意忽略最后一段:)但如果你刚开始，我想建议写一些较小的客户端和服务器，然后尝试编写你的抽象层。