IOCP二：同时发送和接收
实验过程：
1.线程A在socket s上投递WSARecv等待接收数据
2.线程B在s上投递WSASend发送数据"nihaihaoma"
3.Client成功接收"nihaihaoma"
4.线程B在s上第二次投递WSASend发送数据"nihaihaoma"
5.Client再次成功接收"nihaihaoma"
6.Client回发数据"xiaogushihaoren"
7.线程A的WSARecv成功接收"xiaogushihaoren"
实验结论如下：
线程A在socket 1上投递异步接收请求后等待数据到来，线程B在socket 1上投递异步发送请求，两厢互不干扰。即不同线程同一socket发送接收互不干扰。
实验结果图：
试验代码：
#include <WinSock2.h>
#include <Windows.h>
#include <iostream>
#include <process.h>
#include <string>
#include <MSWSock.h>
#include <set>
#pragma comment(lib, "Ws2_32.lib")
#pragma comment(lib, "Kernel32.lib")
#pragma comment(lib, "Mswsock.lib")
#define BUF_LEN 1024
enum OperateType
{
OP_RECV,
OP_SEND,
OP_ACCEPT,
};
typedef struct PER_HANDLE_DATA
{
SOCKET s;
SOCKADDR_IN addr;
}PER_HANDLE_DATA, *LPPER_HANDLE_DATA;
typedef struct PER_IO_DATA
{
OVERLAPPED overlapped;
SOCKET cs;
char buf[BUF_LEN];
int operationType;
}PER_IO_DATA, *LPPER_IO_DATA;
SOCKET SocketInitBindListen()
{
SOCKET s = socket(AF_INET, SOCK_STREAM, 0);
if(INVALID_SOCKET == s)
{
std::cout<<"create socket failed : "<<GetLastError()<<std::endl;
return INVALID_SOCKET;
}
SOCKADDR_IN addr;
addr.sin_family = AF_INET;
addr.sin_addr.S_un.S_addr = INADDR_ANY;
addr.sin_port = htons(4444);
int ret = bind(s, (sockaddr*)&addr, sizeof(addr));
if(SOCKET_ERROR == ret)
{
std::cout<<"bind failed : "<<GetLastError()<<std::endl;
return SOCKET_ERROR;
}
ret = listen(s, 10);
if(SOCKET_ERROR == s)
{
std::cout<<"listen fail : "<<GetLastError()<<std::endl;
return SOCKET_ERROR;
}
return s;
}
bool PostAccept(SOCKET listenSocket)
{
SOCKET cs = socket(AF_INET, SOCK_STREAM, 0);
if(INVALID_SOCKET == cs)
{
std::cout<<"Create Socket Failed : "<<GetLastError()<<std::endl;
return false;
}
LPPER_IO_DATA ppiod = new PER_IO_DATA;
ZeroMemory(&(ppiod->overlapped), sizeof(OVERLAPPED));
ppiod->operationType = OP_ACCEPT;
ppiod->cs = cs;
DWORD dwRecv;
int len = sizeof(sockaddr_in) + 16;
bool ret = AcceptEx(listenSocket, ppiod->cs, ppiod->buf, 0, len, len, &dwRecv, &ppiod->overlapped);
if(false == ret && ERROR_IO_PENDING != GetLastError())
{
std::cout<<"AcceptEx Failed : "<<GetLastError()<<std::endl;
return false;
}
return true;
}
bool PostSend(SOCKET s, const char *buf, int len)
{
LPPER_IO_DATA ppiod = new PER_IO_DATA;
ZeroMemory(&(ppiod->overlapped), sizeof(OVERLAPPED));
ppiod->operationType = OP_SEND;
memset(ppiod->buf, 0, BUF_LEN);
memcpy(ppiod->buf, buf, len);
WSABUF databuf;
databuf.buf = ppiod->buf;
databuf.len = len;
DWORD dwRecv = 0;
DWORD dwFlags = 0;
int ret = WSASend(s, &databuf, 1, &dwRecv, dwFlags, &ppiod->overlapped, NULL);
if(SOCKET_ERROR == ret && WSA_IO_PENDING != GetLastError())
return false;
return true;
}
/****************************************************
Client中收发顺序：发-收-收-发
这个子线程证明了线程A在socket 1上投递异步接收请求后等待数据到来，线程B在socket 1上投递异步发送请求，两厢互不干扰。
*****************************************************/
unsigned int __stdcall Func(void *arg)
{
SOCKET s = (SOCKET)arg;
while(std::cin.get())
{
std::string str = "nihaihaoma";
bool ret = PostSend(s, str.c_str(), str.length());
if(false == ret)
break;
}
_endthreadex(0);
return 0;
}
unsigned int __stdcall ThreadFunc(void *arg)
{
HANDLE hcp = (HANDLE)arg;
if(NULL == hcp)
{
std::cout<<"thread arg error"<<std::endl;
return -1;
}
DWORD dwNum = 0;
LPPER_HANDLE_DATA pphd;
LPPER_IO_DATA ppiod;
while(true)
{
bool ret = GetQueuedCompletionStatus(hcp, &dwNum, (LPDWORD)&pphd, (LPOVERLAPPED*)&ppiod, WSA_INFINITE);
//线程退出控制，没有释放申请的堆空间，还不完善
if(-1 == dwNum)
{
std::cout<<"Thread Exit"<<std::endl;
_endthreadex(0);
return 0;
}
/*************************************************************************
实际试验结果如下：
前提：Server在s已经投递WSARecv，WSARecv此时正等待数据到来
若Client调用closesocket优雅关闭连接，
则该WSARecv在GetQueuedCompletionStatus中以ret=true，dwNum=0，GetLastError()=997返回 （997，WSA_IO_PENDING）
若Client直接退出，
则该WSARecv在GetQueuedCompletionStatus中以ret=false，dwNum=0，GetLastError()=64返回 （64，指定的网络名不再可用）
若Server调用closesocket关闭该socket，
则该WSARecv在GetQueuedCompletionStatus中以ret=false，dwNum=0，GetLastError()=64返回 （64，指定的网络名不再可用）
若Client突然断电，
则2014.7.23 18:49 用丁胖子电脑测试结果表明对于暴力断电，IOCP无任何反应，故心跳检测必不可少
注：以上结论均是反复验证的结果，故可靠性较高
****************************************************************************/
//连接断开
int type = ppiod->operationType;
if(0 == dwNum && OP_ACCEPT != type)
{
std::cout<<"The Connection Be Closed : "<<GetLastError()<<std::endl;
closesocket(pphd->s);
delete pphd;
delete ppiod;
continue;
}
//错误发生
if(false == ret)
{
std::cout<<"An Error Occurs : "<<GetLastError()<<std::endl;
closesocket(pphd->s);
delete pphd;
delete ppiod;
continue;
}
if(OP_RECV == type)
{
//
std::cout<<"接收完成"<<std::endl;
std::cout<<"接收端口号 ："<<pphd->s<<std::endl;
//
ppiod->buf[dwNum] = '\0';
std::cout<<ppiod->buf<<std::endl;
ZeroMemory(&(ppiod->overlapped), sizeof(OVERLAPPED));
ZeroMemory(ppiod->buf, BUF_LEN);
WSABUF databuf;
databuf.buf = ppiod->buf;
databuf.len = BUF_LEN;
DWORD dwRecv = 0;
DWORD dwFlags = 0;
WSARecv(pphd->s, &databuf, 1, &dwRecv, &dwFlags, &ppiod->overlapped, NULL);
}
else if(OP_SEND == type)
{
//
std::cout<<"发送完成"<<std::endl;
std::cout<<"完成发送的端口号 : "<<pphd->s<<std::endl;
//
delete ppiod;
}
else if(OP_ACCEPT == type)
{
//
std::cout<<"连接完成"<<std::endl;
//
SOCKET cs = ppiod->cs;
int len = sizeof(sockaddr_in) + 16;
int localLen, remoteLen;
LPSOCKADDR localAddr, remoteAddr;
GetAcceptExSockaddrs(ppiod->buf, 0, len, len, (SOCKADDR **)&localAddr, &localLen, (SOCKADDR **)&remoteAddr, &remoteLen);
LPPER_HANDLE_DATA p = new PER_HANDLE_DATA;
p->s = cs;
memcpy(&p->addr, remoteAddr, remoteLen);
char *ch = inet_ntoa(p->addr.sin_addr);
CreateIoCompletionPort((HANDLE)cs, hcp, (DWORD)p, 0);
ZeroMemory(&(ppiod->overlapped), sizeof(OVERLAPPED));
ppiod->operationType = OP_RECV;
WSABUF databuf;
databuf.buf = ppiod->buf;
databuf.len = BUF_LEN;
DWORD dwRecv = 0;
DWORD dwFlags = 0;
WSARecv(p->s, &databuf, 1, &dwRecv, &dwFlags, &ppiod->overlapped, NULL);
PostAccept(pphd->s);
PostAccept(pphd->s);
//测试在s等待接收时，另一线程在s上投递发送会怎样
_beginthreadex(NULL, 0, Func, (void*)p->s, 0, NULL);
}
}
return 0;
}
int main()
{
WSADATA ws;
if(WSAStartup(MAKEWORD(2, 2), &ws) != 0)
{
std::cout<<"WSAStartup error : "<<GetLastError()<<std::endl;
return -1;
}
HANDLE hcp = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, 0);
if(NULL == hcp)
{
std::cout<<"create completion port failed : "<<GetLastError()<<std::endl;
return -1;
}
std::set<HANDLE> setWorkers;
SYSTEM_INFO si;
GetSystemInfo(&si);
for(int i = 0; i < si.dwNumberOfProcessors * 2 + 2; i++)
{
HANDLE worker = (HANDLE)_beginthreadex(NULL, 0, ThreadFunc, (LPVOID)hcp, 0, NULL);
if(NULL == worker)
{
std::cout<<"create thread failed : "<<GetLastError()<<std::endl;
return -1;
}
setWorkers.insert(worker);
}
SOCKET s = SocketInitBindListen();
if(INVALID_SOCKET == s)
{
std::cout<<"socket init failed"<<std::endl;
return -1;
}
LPPER_HANDLE_DATA pphd = new PER_HANDLE_DATA;
pphd->s = s;
CreateIoCompletionPort((HANDLE)s, hcp, (DWORD)pphd, 0);
bool ret = PostAccept(s);
if(false == ret)
{
std::cout<<"PostAccept Failed"<<std::endl;
return -1;
}
//退出控制
/*std::cin.get();
for(int i = 0; i < setWorkers.size(); i++)
PostQueuedCompletionStatus(hcp, -1, NULL, NULL);*/
auto iter = setWorkers.begin();
for(; iter != setWorkers.end(); iter++)
WaitForSingleObject(*iter, INFINITE);
WSACleanup();
std::cin.get();
return 0;
}
#include <WinSock2.h>
#include <Windows.h>
#include <iostream>
#include <string>
#include <process.h>
#pragma comment(lib, "Ws2_32.lib")
int main()
{
WSADATA ws;
if(WSAStartup(MAKEWORD(2, 2), &ws) != 0)
return false;
SOCKET s = socket(AF_INET, SOCK_STREAM, 0);
if(INVALID_SOCKET == s)
return false;
sockaddr_in addr = {0};
addr.sin_addr.S_un.S_addr = inet_addr("192.168.15.14");
addr.sin_family = AF_INET;
addr.sin_port = htons(4444);
int ret = connect(s, (sockaddr*)&addr, sizeof(addr));
if(SOCKET_ERROR == ret)
{
std::cout<<"Connect Server Failed : "<<GetLastError()<<std::endl;
return -1;
}
std::string str = "xiaogushihaoren";
ret = send(s, str.c_str(), str.length(), 0);
if(SOCKET_ERROR == ret)
{
std::cout<<"Send Data Failed : "<<GetLastError()<<std::endl;
return -1;
}
char ch[100] = {0};
ret = recv(s, ch, 100, 0);
if(0 == ret)
{
std::cout<<"Peer Close The Connection"<<std::endl;
return -1;
}
else if(SOCKET_ERROR == ret)
{
std::cout<<"Recv Data Failed : "<<GetLastError()<<std::endl;
return -1;
}
std::cout<<ch<<std::endl;
{
char ch[100] = {0};
ret = recv(s, ch, 100, 0);
if(0 == ret)
{
std::cout<<"Peer Close The Connection"<<std::endl;
return -1;
}
else if(SOCKET_ERROR == ret)
{
std::cout<<"Recv Data Failed : "<<GetLastError()<<std::endl;
return -1;
}
std::cout<<ch<<std::endl;
}
{
std::string str = "xiaogushihaoren";
ret = send(s, str.c_str(), str.length(), 0);
if(SOCKET_ERROR == ret)
{
std::cout<<"Send Data Failed : "<<GetLastError()<<std::endl;
return -1;
}
}
std::cin.get();
closesocket(s);
std::cin.get();
return 0;
}
