服务器发送消息给客服端的有关问题
服务器发送消息给客服端的问题
问题描述：服务器一个，客服端两个，现在服务器给客服端发消息，却只有一个客服端收到，然后再发又只有一个收到，不过这个时候是另一个客服端收到，依次轮流收到服务器的信息，感觉有些奇怪，有些问题是想不明白
问题描述：服务器一个，客服端两个，现在服务器给客服端发消息，却只有一个客服端收到，然后再发又只有一个收到，不过这个时候是另一个客服端收到，依次轮流收到服务器的信息，感觉有些奇怪，有些问题是想不明白
- C/C++ code
//服务器端代码：
#include "stdafx.h"
#include <windows.h>
#include <process.h>
#include <iostream>
#include <string>
using namespace std;
#pragma comment(lib,"ws2_32.lib")
/*recive message thread*/
DWORD WINAPI ClientThread(LPVOID lp)
{
SOCKET sock = (SOCKET)lp;//----------
char szbuff[1024];
int ret;
while(1)
{
//perform a blocking recv() call
ret = recv(sock,szbuff,1024,0);
if(ret == 0)
break;
else if(ret == SOCKET_ERROR)
{
cout << "recv() failed " << WSAGetLastError() << endl;
break;
}
szbuff[ret] = '\0';
cout << "RECV:" << szbuff << " " << ret << "bytes" << endl;
}
return 0;
}
/*send message thread*/
DWORD WINAPI SendThread(LPVOID lp)
{
SOCKET sock = (SOCKET)lp;
char buff[1024];
string msg;
int ret;
while(1)
{
cin >> msg;
char buff[1024];
strcpy(buff,msg.c_str());
ret = send(sock,buff,msg.length() + 1,0);
if(ret == 0)
break;
else if(ret == SOCKET_ERROR)
{
cout << "send failed " << WSAGetLastError() << endl;
break;
}
}
return 0;
}
int _tmain(int argc, _TCHAR* argv[])
{
//cout << *(int*)lp << endl;
//Initialize Winsock
WSADATA wsd;
if(WSAStartup(MAKEWORD(2,2),&wsd) != 0)
{
cout << "Failled to load Winsock!" << endl;
return 1;
}
//create our listening socket
SOCKET sListen,sClient;
sListen = socket(AF_INET,SOCK_STREAM,IPPROTO_IP);
if(sListen == SOCKET_ERROR)
{
cout << "socket() failed " << WSAGetLastError() << endl;
return 1;
}
//Select local interface and bind to it
struct sockaddr_in local,client;
int iport = 5000;
local.sin_addr.s_addr = htonl(INADDR_ANY);
local.sin_port = htons(iport);
local.sin_family = AF_INET;
if(bind(sListen,(SOCKADDR*)&local,sizeof(local)) == SOCKET_ERROR)
{
cout << "bind() failed " << WSAGetLastError() << endl;
return 1;
}
listen(sListen,8);
cout << "server side is in listening status!" << endl;
//Waitfor incoming clients,Once one is detected,create thread and pass
//the handle off to it
int iAddrSize(0);
HANDLE hThread;
DWORD dwThreadId,dwSendThreadId;
while(1)
{
iAddrSize = sizeof(client);
sClient = accept(sListen,(SOCKADDR*)&client,&iAddrSize);
if(sClient == INVALID_SOCKET)
{
cout << "accept() failed " << WSAGetLastError() << endl;
break;
}
cout << "Accept client:" << inet_ntoa(client.sin_addr) << endl;
cout << ntohs(client.sin_port) << endl;
hThread = CreateThread(NULL,0,ClientThread,
(LPVOID)sClient,0,&dwThreadId);
HANDLE hSendThread = CreateThread(NULL,0,SendThread,
(LPVOID)sClient,0,&dwSendThreadId);
if(hThread == NULL)
{
cout << "CreateThread() failed " << GetLastError() << endl;
break;
}
CloseHandle(hThread);
CloseHandle(hSendThread);
}
closesocket(sListen);
WSACleanup();
return 0;
}
- C/C++ code
//客服端代码：
#include "stdafx.h"
#include <windows.h>
#include <process.h>
#include <iostream>
#include <string>
#include <stdio.h>
#include <stdlib.h>
using namespace std;
#pragma comment(lib,"ws2_32.lib")
/*recive message thread*/
DWORD WINAPI ClientThread(LPVOID lp)
{
SOCKET sock = (SOCKET)lp;
char szbuff[1024];
int ret;
while(1)
{
ret = recv(sock,szbuff,1024,0);
if(ret == 0)
break;
else if(ret == SOCKET_ERROR)
{
cout << "recv() failed " << WSAGetLastError() << endl;
break;
}
szbuff[ret] = '\0';
cout << "recv " << szbuff << " " << ret << "bytes" << endl;
}
return 0;
}
/*send message thread*/
DWORD WINAPI SendThread(LPVOID lp)
{
SOCKET sock = (SOCKET)lp;
string msg;
char buff[1024];
int ret;
while(1)
{
cin >> msg;
strcpy(buff,msg.c_str());
ret = send(sock,buff,msg.length() + 1,0);
if(ret == 0)
break;
else if(ret == SOCKET_ERROR)
{
cout << "send failed " << WSAGetLastError() << endl;
break;
}
}
return 0;
}
int _tmain(int argc, _TCHAR* argv[])
{
WSADATA wsd;
SOCKET sClient;
struct sockaddr_in server;
struct hostent *host = NULL;
//load Winsock
if(WSAStartup(MAKEWORD(2,2),&wsd) != 0)
{
cout << "Failled to load Winsock!" << endl;
return 1;
}
//create socket and attempt to connect to the server
sClient = socket(AF_INET,SOCK_STREAM,IPPROTO_IP);
if(sClient == INVALID_SOCKET)
{
cout << "socket failed " << WSAGetLastError() << endl;
return 1;
}
string szServer;
u_long iport;
cout << "please input IP address: " << endl;
cin >> szServer;
cout << "please input port number: " << endl;
cin >> iport;
server.sin_addr.s_addr = inet_addr(INADDR_ANY);
server.sin_family = AF_INET;
server.sin_port = htons(iport);
//if the supplied server address isn't in the form
//"aaa.bbb.ccc.ddd" it's a host name,so try to resolve it
if(server.sin_addr.s_addr == INADDR_NONE)
{
host = gethostbyname(szServer.c_str());
if(host == NULL)
{
cout << "unable to resolve server: " << szServer << endl;
return 1;
}
CopyMemory(&server.sin_addr,host->h_addr_list[0],host->h_length);
}
if(connect(sClient,(SOCKADDR*)&server,sizeof(server))==SOCKET_ERROR)
{
cout << "connect failed " << WSAGetLastError() << endl;
return 1;
}
cout << "connect succeed!" << endl;
DWORD dwThreadId,dwSendThreadId;
HANDLE hThread = CreateThread(NULL,0,ClientThread,
(LPVOID)sClient,0,&dwThreadId);
HANDLE hSendThread = CreateThread(NULL,0,SendThread,
(LPVOID)sClient,0,&dwSendThreadId);
if(hThread == NULL)
{
cout << "CreateThread() failed " << GetLastError() << endl;
}
if(hSendThread == NULL)
{
cout << "CreateThread() failed " << GetLastError() << endl;
}
CloseHandle(hThread);
CloseHandle(hSendThread);
//prevent main thread exit;
while(1)
{
}
closesocket(sClient);
WSACleanup();
return 0;
}