网络连接的问题有代码

[BMCRNET]

客户端，每次connect的时候出错！
不知道是怎么回事，麻烦分析一下！

客户端

#include <winsock2.h>
#include <stdio.h>
#pragma comment (lib,"ws2_32.lib")

int main(int argc,char *argv[])
{
	WORD wVersionRequested;
	WSADATA wsaData;
	int err;

	char recvBuf[100];
	SOCKET socClient;
	SOCKADDR_IN addrSvr;
    
	wVersionRequested = MAKEWORD(2,2);
	if((err = WSAStartup(wVersionRequested,&wsaData)) != 0)
	{
		printf("WSAStartup error!\n");
		exit(1);
	}
	if(LOBYTE(wsaData.wVersion) != 2||HIBYTE(wsaData.wVersion) != 2)
	{
		WSACleanup();
        printf("Pls check socket version!\n");
		exit(1);
	}
    
	while (1) 
	{
		if(socClient = socket(AF_INET,SOCK_STREAM,0) == INVALID_SOCKET)
		{
			printf("Create socket fail!\n");
			exit(0);
		}
          
		addrSvr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
		addrSvr.sin_family = AF_INET;
		addrSvr.sin_port = htons(8080);

		if(connect(socClient,(SOCKADDR *)&addrSvr,sizeof(SOCKADDR)) == SOCKET_ERROR)
		{
            printf("Connect socket fail!\n");
			exit(0);
		}

		if(send(socClient,"this is cxl request",strlen("this is cxl request")+1,0) == SOCKET_ERROR)
		{
            printf("Send data fail!\n");
			exit(0);
		}

		if(recv(socClient,recvBuf,100,0) == SOCKET_ERROR)
		{
			printf("Recve data fail!\n");
			exit(0);
		}

		printf("Get data from server%s\n",recvBuf);
		closesocket(socClient);
	}
	WSACleanup();
	return 0;
}

服务端

#include <winsock2.h>
#include <stdlib.h>

#pragma comment (lib,"ws2_32.lib")
int main(int argv,char *argc[])
{
	WORD wVersionRequested;
	WSADATA wsaData;
	int err;
	int len;
	char recBuf[100];
	char sendBuf[100];

	SOCKET socSvr;
	SOCKET socCon;
	SOCKADDR_IN  addrSvr;
	SOCKADDR_IN  addrCli;
	wVersionRequested = MAKEWORD(2,2);
    
	err = WSAStartup(wVersionRequested,&wsaData);
	if(err != 0)
	{
		printf("Pls check the version of socket!\n");
		exit(1);
	}

	if(LOBYTE(wsaData.wVersion) != 2||HIBYTE(wsaData.wVersion) != 2)
	{
		printf("wsaData.wVersion != 2\n");
		WSACleanup();
		exit(1);
		return 0;
	}

	if((socSvr = socket(AF_INET,SOCK_STREAM,0)) == INVALID_SOCKET)
	{
		printf("Create socket fail!\n");
		exit(0);
	}

    addrSvr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
	addrSvr.sin_family = AF_INET;
	addrSvr.sin_port = htons(8080);

	if(bind(socSvr,(SOCKADDR *)&addrSvr,sizeof(SOCKADDR)) == SOCKET_ERROR)
	{
		printf("bind socket fail!\n");
		exit(0);
	}

    if(listen(socSvr,5) == SOCKET_ERROR)
	{
		printf("listen socket fail!\n");
		exit(0);
	}

	len = sizeof(SOCKADDR);
	while(1)
	{
		//接受客户端的请求，并与客户端建立连接
		if((socCon = accept(socSvr,(SOCKADDR *)&addrCli,&len)) == INVALID_SOCKET)
		{
			printf("create connect with client fail!\n");
		    exit(0);
		}
		if(recv(socCon,recBuf,100,0) == SOCKET_ERROR )
		{
            printf("recv data fail!\n");
		    exit(0);
		}
		else
		{
			printf("get client data:%\s\n",recBuf);
		}

		sprintf(sendBuf,"Welcome %s to cxl server",inet_ntoa(addrCli.sin_addr));
		
		if(send(socCon,sendBuf,strlen(sendBuf)+1,0) == SOCKET_ERROR)
		{
			printf("send data fail!\n");
		    exit(0);
		}
		closesocket(socCon);
	}
	WSACleanup();
	return 0;
}

[cnzdgs]

在同一台电脑上，先运行服务端，再运行客户端。注意看一下是否被防火墙阻止了。调试服务端，在accept后面设置断点，看看能否执行到。

问题要发对板块才有利于解决，应该移动到VC/MFC—网络编程版本去。

[BMCRNET]

accept设置断点后，
调试时候程序就静止到该函数。

客户端调试：
程序到connect 后出错！
WSAGetLastError = 10038

[BMCRNET]

#include <winsock2.h>
#include <stdio.h>
#pragma comment (lib,"ws2_32.lib")

int main(int argc,char *argv[])
{
    WORD wVersionRequested;
    WSADATA wsaData;
    int err;

    char recvBuf[100];
    SOCKET socClient;
    SOCKADDR_IN addrSvr;
    
    wVersionRequested = MAKEWORD(2,2);
    if((err = WSAStartup(wVersionRequested,&wsaData)) != 0)
    {
        printf("WSAStartup error!\n");
        exit(1);
    }
    if(LOBYTE(wsaData.wVersion) != 2||HIBYTE(wsaData.wVersion) != 2)
    {
        WSACleanup();
        printf("Pls check socket version!\n");
        exit(1);
    }
    
    while (1) 
    {   //这个地方少括号了！符号优先级问题
        if((socClient = socket(AF_INET,SOCK_STREAM,0)) == INVALID_SOCKET)
        {
            printf("Create socket fail!\n");
            exit(0);
        }
          
        addrSvr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
        addrSvr.sin_family = AF_INET;
        addrSvr.sin_port = htons(8080);

        if(connect(socClient,(SOCKADDR *)&addrSvr,sizeof(SOCKADDR)) == SOCKET_ERROR)
        {
            printf("Connect socket fail!\n");
            exit(0);
        }

        if(send(socClient,"this is cxl request",strlen("this is cxl request")+1,0) == SOCKET_ERROR)
        {
            printf("Send data fail!\n");
            exit(0);
        }

        if(recv(socClient,recvBuf,100,0) == SOCKET_ERROR)
        {
            printf("Recve data fail!\n");
            exit(0);
        }

        printf("Get data from server%s\n",recvBuf);
        closesocket(socClient);
    }
    WSACleanup();
    return 0;
}

自己应该扇自己两下子！
哎...........

[BAYNPU]

请问楼主该源程序是不是在C++6.0编译吗?

[BMCRNET]

是在不好意思哈

好久没有看整个帖子了

回楼上

确实在是VC6上编译