pcclient.cpp

WinCE编程第三版收录的所有源代码（非常适合学习时

//======================================================================
// PCClient.cpp : Simple client for the tick server example
//
// Written for the book Programming Windows CE
// Copyright (C) 2003 Douglas Boling
//======================================================================

#include "stdafx.h"

int _tmain(int argc, _TCHAR* argv[])
{
    SOCKET sock;
    SOCKADDR_IN dest_sin;
    WORD wPort = 1000;
    int rc;

    if (argc < 2) {
        printf ("Syntax: %s <IP Addr> %d\r\n", argv[0], argc);
        return 0;
    }
    // Init winsock
    WSADATA wsaData;
    if ((rc = WSAStartup(0x101,&wsaData)) != 0) {
        printf ("WSAStartup failed\r\n");
        WSACleanup();
        return 0;
    }
    // Create socket
    sock = socket( AF_INET, SOCK_STREAM, 0);
    if (sock == INVALID_SOCKET) {
        return INVALID_SOCKET;
    }

    // Set up IP address to access
    memset (&dest_sin, 0, sizeof (dest_sin));
    dest_sin.sin_family = AF_INET;
    dest_sin.sin_addr.S_un.S_addr = inet_addr (argv[1]);
    dest_sin.sin_port = htons(wPort);

    printf ("Connecting to %s  Port %d\r\n", 
            inet_ntoa (dest_sin.sin_addr), wPort);

    // Connect to the device
    rc == connect( sock, (PSOCKADDR) &dest_sin, sizeof( dest_sin));
    if (rc == SOCKET_ERROR) {
        printf ("Err in connect. %d\r\n", WSAGetLastError());
        closesocket( sock );
        return INVALID_SOCKET;
    }
    DWORD dwCmd = 1, dwTicks = 0;

    // Ask for ticks
    send (sock, (char *)&dwCmd, 4, 0);
    recv (sock, (char *)&dwTicks, 4, 0);
    printf ("Ticks: %d\r\n", dwTicks);

    // Wait 1/4 second and ask again
    Sleep(250);
    send (sock, (char *)&dwCmd, 4, 0);
    recv (sock, (char *)&dwTicks, 4, 0);
    printf ("Ticks: %d\r\n", dwTicks);

    // Terminate connection and close socket
    dwCmd = 0;
    send (sock, (char *)&dwCmd, 4, 0);
    Sleep(100);
    closesocket (sock);
    return 0;
}