MFC学习 socket

下面未处理异常

tcpserver.cpp

#include "WinSock2.h"
#include <stdio.h>
#pragma comment(lib, "ws2_32.lib")
#define PORT 1666
int main()
{
    WORD wVersion = MAKEWORD(2, 2);
    int err;
    WSADATA wsaData;
    err = WSAStartup(wVersion, &wsaData);
    SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, NULL);
    sockaddr_in addSrv;
    addSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY); //或用inet_addr("192.168.1.1");
    addSrv.sin_family = AF_INET;
    addSrv.sin_port = htons(PORT);
    bind(sockSrv, (sockaddr FAR *)&addSrv, sizeof(addSrv));
    int iResult = listen(sockSrv, SOMAXCONN);//等待连结数, 最大连接请求数 SOMAXCONN
    printf("server ip:%s\n", inet_ntoa(addSrv.sin_addr));
    printf("server port:%d\n", ntohs(addSrv.sin_port));
    printf("start listening...\n");

    while(TRUE)
    {
        sockaddr_in addClient;
        int iLen = sizeof(addClient);
        SOCKET sockConn = accept(sockSrv, (sockaddr FAR *)&addClient, &iLen);
        printf("client ip:%s\n", inet_ntoa(addClient.sin_addr));
        printf("client port:%d\n", ntohs(addClient.sin_port));
        char sendBuf[100];
        sprintf(sendBuf, "Welcome %s to server", inet_ntoa(addClient.sin_addr));
        send(sockConn, sendBuf, strlen(sendBuf) + 1, 0); //多写一个字节, 可以多个\0
        char recvBuf[100];
        recv(sockConn, recvBuf, 100, 0); //tcp用recv, udp用recvfrom
        printf("%s\n", recvBuf);
        closesocket(sockConn);
    }
    closesocket(sockSrv);
    WSACleanup();
    return 0;
}

tcpclient.cpp

#include "WinSock2.h"
#include <stdio.h>
#pragma comment(lib, "ws2_32.lib")
#define PORT 1666
int main()
{
    WORD wVersion = MAKEWORD(2, 2);
    int err;
    WSADATA wsaData;
    err = WSAStartup(wVersion, &wsaData);
    SOCKET sockClient = socket(AF_INET, SOCK_STREAM, NULL);
    sockaddr_in addSrv;
    addSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1"); //服务器地址
    addSrv.sin_family = AF_INET;
    addSrv.sin_port = htons(PORT);
    connect(sockClient, (sockaddr FAR *)&addSrv, sizeof(addSrv));
    char recvBuf[100];
    recv(sockClient, recvBuf, 100, 0);
    printf("%s\n", recvBuf);
    send(sockClient, "hello123", strlen("hello123") + 1, 0);
    closesocket(sockClient);
    WSACleanup();
    system("pause");
    return 0;
}

udpserver.cpp

#include "WinSock2.h"
#include <stdio.h>
#pragma comment(lib, "ws2_32.lib")
#define PORT 1666
int main()
{
    WORD wVersion = MAKEWORD(2, 2);
    int err;
    WSADATA wsaData;
    err = WSAStartup(wVersion, &wsaData);
    SOCKET sockSrv = socket(AF_INET, SOCK_DGRAM, NULL);
    sockaddr_in addSrv;
    addSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY); //或用inet_addr("192.168.1.1");
    addSrv.sin_family = AF_INET;
    addSrv.sin_port = htons(PORT);
    bind(sockSrv, (sockaddr FAR *)&addSrv, sizeof(addSrv));

    printf("server ip:%s\n", inet_ntoa(addSrv.sin_addr));
    printf("server port:%d\n", ntohs(addSrv.sin_port));


    while(TRUE)
    {
        sockaddr_in addClient;
        int iLen = sizeof(addClient);
        char recvBuf[100];
        recvfrom(sockSrv, recvBuf, 100, 0, (sockaddr*)&addClient, &iLen);
        printf("client ip:%s\n", inet_ntoa(addClient.sin_addr));
        printf("client port:%d\n", ntohs(addClient.sin_port));
        printf("%s", recvBuf);
    }
    closesocket(sockSrv);
    WSACleanup();
    return 0;
}

udpclient.cpp

#include "WinSock2.h"
#include <stdio.h>
#pragma comment(lib, "ws2_32.lib")
#define PORT 1666
int main()
{
    WORD wVersion = MAKEWORD(2, 2);
    int err;
    WSADATA wsaData;
    err = WSAStartup(wVersion, &wsaData);
    SOCKET sockClient = socket(AF_INET, SOCK_DGRAM, NULL);
    sockaddr_in addSrv;
    addSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1"); //或用inet_addr("192.168.1.1");
    addSrv.sin_family = AF_INET;
    addSrv.sin_port = htons(PORT);
    sendto(sockClient, "hello", strlen("hello") + 1, 0, (SOCKADDR*)&addSrv, sizeof(addSrv));
    closesocket(sockClient);
    WSACleanup();
    system("pause");
    return 0;
}