TCP通信例程--windows版

// TCP Client

#include <stdio.h>
#include <winsock.h>
//#include <afxsock.h>;

#pragma comment(lib, "ws2_32.lib")

int main(void)
{
    int iRet = 0;
    WSADATA data;
    WORD w = MAKEWORD(2, 2);
    SOCKET s;
    struct sockaddr_in addrRemote, addrLocal;
    char sztext[10] = {0};

    WSAStartup(w, &data);
    s = socket(AF_INET, SOCK_STREAM, 0);

    addrLocal.sin_family = AF_INET;
    addrLocal.sin_port = htons(1698);
    addrLocal.sin_addr.S_un.S_addr = htonl(INADDR_ANY);

    iRet = bind(s, (SOCKADDR*)&addrLocal, sizeof(SOCKADDR));
    if (iRet < 0)
    {
        printf("bind error!");
    }

    addrRemote.sin_family = AF_INET;
    addrRemote.sin_port = htons(12423);
    addrRemote.sin_addr.S_un.S_addr = inet_addr("10.10.22.10");

    iRet = connect(s, (SOCKADDR *)&addrRemote, sizeof(addrRemote));
    printf("iRet is %d\n", iRet);
    

    return 0;
}

 

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

void main(void)
{
    SOCKET iSock = -1, tmpSock = -1;
    int opt = 0;
    int iRet = 0;
    int iRes = 0;
    struct sockaddr_in addrLocal, addrRemote;
    WSADATA data;
    WORD w = MAKEWORD(2, 2);
    WSAStartup(w, &data);

    iSock = socket(AF_INET, SOCK_STREAM, 0);
    if (INVALID_SOCKET == iSock)
    {
        printf("Create socket error![%d]\n", GetLastError());
        WSACleanup();
        return;
    }

    //iRes = 1;
    //ioctlsocket(iSock, FIONBIO, (u_long FAR*)&iRes);

    /* Set Local IP Address */
    addrLocal.sin_family = AF_INET;
    addrLocal.sin_port = htons(20040);
    addrLocal.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
    //addrLocal.sin_addr.S_un.S_addr = inet_addr("10.10.22.100");

    iRet = bind(iSock, (SOCKADDR*)&addrLocal, sizeof(SOCKADDR_IN));
    if (iRet < 0)
    {
        printf("bind error\n");
        closesocket(iSock);
        WSACleanup();
        return;
    }

    iRet = listen(iSock, 5);
    if (iRet < 0)
    {
        printf("listen error\n");
        closesocket(iSock);
        WSACleanup();
        return;
    }

    opt = sizeof(SOCKADDR);
    //tmpSock = accept(iSock, (SOCKADDR *)&addrRemote, &opt);
    while(1)
    {
        tmpSock = accept(iSock, (SOCKADDR *)&addrRemote, &opt);
        if (INVALID_SOCKET != tmpSock)
        {
            printf("Ready to be connected...[%d]\n", tmpSock);
            closesocket(tmpSock);
            //WSACleanup();
            tmpSock = INVALID_SOCKET;
            //tmpSock = accept(iSock, (SOCKADDR *)&addrRemote, &opt);
        }
        //printf("tmpSock: %d.\n", tmpSock);
        //else
        //{
        //    closesocket(tmpSock);//printf("Accept Remote Connect![%d]\n", tmpSock);
        //}
    }
    return;
}