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  <br>

    WSACleanup(); <br>

    return retval; <br>

} <br>

  <br>

  <br>

-- <br>

人生在世，如果不能喝酒，不能想女人，连人家欺负到了头上也不能还手，还不如死了算了了  <br>

  <br>

※ 来源:·BBS 水木清华站 bbs.net.tsinghua.edu.cn·[FROM: 166.111.74.189] <br>

发信人: Christopher (Chris), 信区: Winsock <br>

标  题: Re: 一个不错的Winsocket站点 <br>

发信站: BBS 水木清华站 (Fri Feb 27 10:16:55 1998) <br>

  <br>

【 在 Christopher (Chris) 的大作中提到: 】 <br>

例程二：调用ICMP.DLL来Ping另一台计算机。建议用WWW方式浏览。 <br>

  <br>

Example - How to Ping Another Machine, ICMP.DLL Method <br>

  <br>

This example shows how to "ping" another machine using Microsoft's ICMP.DLL. Thiis DLL is an undocumented API for <br>

sending ICMP echo packets, also called "pings," after the submariner's term for sonar signals. This API works fine and is <br>

present on all current Windows boxes with Microsoft Winsocks, but because it is undocumented, Microsoft claims the right to <br>

replace it at any time. Maybe they will, and maybe they won't, but you should keeep the portability issue and the undocumented <br>

issue in mind. If this bothers you, you might check out the raw sockets method ffor sending ping packets. <br>

  <br>

For more information on the ICMP.DLL API, check out sockets.com's ICMP API page.. There is also a ping example <br>

program on MarkG's Win32 page; the following console mode program was distilled from his GUI version. <br>

  <br>

  <br>

By the way, you might be wondering why the program has to load the ICMP.DLL manuually and get the procedure addresses <br>

manually. I'm not sure of the reasons, but I spent an hour trying to get import libraries and DEF files to work. I can only suggest <br>

that some higher power is dead set against you linking this way. B-) <br>

  <br>

  <br>

  <br>

ping.cpp <br>

  <br>

// Borland C++ 5.0: bcc32.cpp ping.cpp <br>

// Visual C++ 5.0:  cl ping.cpp wsock32.lib <br>

  <br>

#include <iostream.h> <br>

#include <winsock.h> <br>

#include <windowsx.h> <br>

#include "icmpdefs.h" <br>

  <br>

int doit(int argc, char* argv[]) <br>

{ <br>

    // Check for correct command-line args <br>

    if (argc < 2) { <br>

        cerr << "usage: ping <host>" << endl; <br>

        return 1; <br>



    } <br>

  <br>

    // Load the ICMP.DLL <br>

    HANDLE hIcmp = LoadLibrary("ICMP.DLL"); <br>

    if (hIcmp == 0) { <br>

        cerr << "Unable to locate ICMP.DLL!" << endl; <br>

        return 2; <br>

    } <br>

  <br>

    // Look up an IP address for the given host name <br>

    struct hostent* phe; <br>

    if ((phe = gethostbyname(argv[1])) == 0) { <br>

        cerr << "Could not find IP address for " << argv[1] << endl; <br>

        return 3; <br>

    } <br>

  <br>

    // Get handles to the functions inside ICMP.DLL that we'll need <br>

    typedef HANDLE (WINAPI* pfnHV)(VOID); <br>

    typedef BOOL (WINAPI* pfnBH)(HANDLE); <br>

    typedef DWORD (WINAPI* pfnDHDPWPipPDD)(HANDLE, DWORD, LPVOID, WORD, <br>

            PIP_OPTION_INFORMATION, LPVOID, DWORD, DWORD); // evil, no? <br>

    pfnHV pIcmpCreateFile; <br>



    pfnBH pIcmpCloseHandle; <br>

    pfnDHDPWPipPDD pIcmpSendEcho; <br>

    pIcmpCreateFile = (pfnHV)GetProcAddress(hIcmp, <br>

            "IcmpCreateFile"); <br>

    pIcmpCloseHandle = (pfnBH)GetProcAddress(hIcmp, <br>

            "IcmpCloseHandle"); <br>

    pIcmpSendEcho = (pfnDHDPWPipPDD)GetProcAddress(hIcmp, <br>

            "IcmpSendEcho"); <br>

    if ((pIcmpCreateFile == 0) || (pIcmpCloseHandle == 0) || <br>

            (pIcmpSendEcho == 0)) { <br>

        cerr << "Failed to get proc addr for function." << endl; <br>

        return 4; <br>

    } <br>

  <br>

    // Open the ping service <br>

    HANDLE hIP = pIcmpCreateFile(); <br>

    if (hIP == INVALID_HANDLE_VALUE) { <br>

        cerr << "Unable to open ping service." << endl; <br>

        return 5; <br>

    } <br>

  <br>

    // Build ping packet <br>



    char acPingBuffer[64]; <br>

    memset(acPingBuffer, '\xAA', sizeof(acPingBuffer)); <br>

    PIP_ECHO_REPLY pIpe = (PIP_ECHO_REPLY)GlobalAllocPtr( <br>

            GHND, sizeof(IP_ECHO_REPLY) + sizeof(acPingBuffer)); <br>

    if (pIpe == 0) { <br>

        cerr << "Failed to allocate global ping packet buffer." << endl; <br>

        return 6; <br>

    } <br>

    pIpe->Data = acPingBuffer; <br>

    pIpe->DataSize = sizeof(acPingBuffer); <br>

  <br>

    // Send the ping packet <br>

    DWORD dwStatus = pIcmpSendEcho(hIP, *((DWORD*)phe->h_addr_list[0]), <br>

            acPingBuffer, sizeof(acPingBuffer), NULL, pIpe, <br>

            sizeof(IP_ECHO_REPLY) + sizeof(acPingBuffer), 5000); <br>

    if (dwStatus != 0) { <br>

        cout << "Addr: " << <br>

                int(LOBYTE(LOWORD(pIpe->Address))) << "." << <br>

                int(HIBYTE(LOWORD(pIpe->Address))) << "." << <br>

                int(LOBYTE(HIWORD(pIpe->Address))) << "." << <br>

                int(HIBYTE(HIWORD(pIpe->Address))) << ", " << <br>

                "RTT: " << int(pIpe->RoundTripTime) << "ms, " << <br>



                "TTL: " << int(pIpe->Options.Ttl) << endl; <br>

    } <br>

    else { <br>

        cerr << "Error obtaining info from ping packet." << endl; <br>

    } <br>

  <br>

    // Shut down... <br>

    GlobalFreePtr(pIpe); <br>

    FreeLibrary(hIcmp); <br>

    return 0; <br>

} <br>

  <br>

int main(int argc, char* argv[]) <br>

{ <br>

    WSAData wsaData; <br>

    if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0) { <br>

        return 255; <br>

    } <br>

  <br>

    int retval = doit(argc, argv); <br>

  <br>

    WSACleanup(); <br>



    return retval; <br>

} <br>

  <br>

icmpdefs.h <br>

  <br>

// Structures required to use functions in ICMP.DLL <br>

  <br>

typedef struct { <br>

   unsigned char Ttl;                                           // Time To Live <br>

   unsigned char Tos;                                        // Type Of Service <br>

   unsigned char Flags;                                      // IP header flags <br>

   unsigned char OptionsSize;                  // Size in bytes of options data <br>

   unsigned char *OptionsData;                       // Pointer to options data <br>

} IP_OPTION_INFORMATION, * PIP_OPTION_INFORMATION; <br>

  <br>

typedef struct { <br>

   DWORD Address;                                           // Replying address <br>

   unsigned long  Status;                                       // Reply status <br>

   unsigned long  RoundTripTime;                         // RTT in milliseconds <br>

   unsigned short DataSize;                                   // Echo data size <br>

   unsigned short Reserved;                          // Reserved for system use <br>

   void *Data;                                      // Pointer to the echo data <br>



   IP_OPTION_INFORMATION Options;                              // Reply options <br>

} IP_ECHO_REPLY, * PIP_ECHO_REPLY; <br>

  <br>

  <br>

-- <br>

人生在世，如果不能喝酒，不能想女人，连人家欺负到了头上也不能还手，还不如死了算了了  <br>

  <br>

※ 来源:·BBS 水木清华站 bbs.net.tsinghua.edu.cn·[FROM: 166.111.74.189] <br>

发信人: Christopher (Chris), 信区: Winsock <br>

标  题: Re: 一个不错的Winsocket站点 <br>

发信站: BBS 水木清华站 (Fri Feb 27 10:19:36 1998) <br>

  <br>

【 在 Christopher (Chris) 的大作中提到: 】 <br>

例程三：使用Raw Sockets的方法Ping另一台计算机。建议用WWW方式浏览。 <br>

Example - How to Ping Another Machine, Raw Sockets Method <br>

  <br>

I have finally come up with a short ping program that uses raw sockets. It's stiill about 3 times longer (365 lines versus 122) than <br>

the ICMP method, but it will continue to work, while the ICMP method might fail to work on Windows 98 and Windows NT <br>

5.0. Also, this version is more flexible. <br>

  <br>

This program is split into two major parts: a driver part and a "pinger" part. TThe driver mainly just declares main(), which calls <br>

the functions in the pinger part in the proper sequence. The pinger part is mosttly reusable as-is, although you will probably want <br>



to do things like exchanging the output statements for encoded return values. Thhere is also a separate module for the IP <br>

checksum calculation function because it is not specifically tied to pinging; thhis same algorithm is used in other parts of TCP/IP. <br>

  <br>

This program is based on a program in the Win32 SDK. However, hardly any of the original code remains. Also, this version is <br>

a bit smarter, compiles un