http://www.codeproject.com/internet/changeproxy1.asp

Introduction

Changing proxy settings of IE is a frequent requirement of mine. Then I got the idea of writing a tool by myself, at last. I have not found clear instructions on this. Many articles recommend to modify registry directly, but unfortunately their instruction is not enough. Most of them direct me to modify the following values in registry :-

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyEnable"=dword:00000001
"ProxyServer"=":"
"ProxyOverride"=""
"DisablePasswordCaching"=dword:00000001

Details

I tested it and find that it does not work at least on my computer.( I access internet by ADSL connection.) So I backed up registry and modified proxy settings via Internet Explorer, finding that [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections] is also changed. So I wrote the following code snippet to change proxy settings:

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				void ShowError(long lerr)
{
    LPVOID lpMsgBuf;
    if (!FormatMessage( 
        FORMAT_MESSAGE_ALLOCATE_BUFFER | 
        FORMAT_MESSAGE_FROM_SYSTEM | 
        FORMAT_MESSAGE_IGNORE_INSERTS,
        NULL,
        lerr,
        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
        (LPTSTR) &lpMsgBuf,
        0,
        NULL ))
    {
        return;
    }
    MessageBox( NULL, (LPCTSTR)lpMsgBuf, "Error", MB_OK | MB_ICONINFORMATION );
    LocalFree( lpMsgBuf );
}
void CieproxyDlg::OnBnClickedOk()
{//set proxy server
    UpdateData();
    GetDlgItemText(IDC_EDIT1,m_sIEProxy);
    HKEY hk;
    LONG lret=RegOpenKeyEx(HKEY_CURRENT_USER,
        "Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings",
        NULL,KEY_WRITE|KEY_SET_VALUE,&hk);
    if(lret==ERROR_SUCCESS&&NULL!=hk)
    {
        TCHAR* pbuf=m_sIEProxy.GetBuffer(1);
        lret=RegSetValueEx( hk,"ProxyServer",NULL,REG_SZ,pbuf,m_sIEProxy.GetLength());
        DWORD dwenable=1;
        lret=RegSetValueEx(hk,"ProxyEnable",NULL,REG_DWORD,
           (LPBYTE)&dwenable,sizeof(dwenable));
        RegCloseKey(hk);
    }
    const TCHAR* keyname3=_T(
      "software\\Microsoft\\windows\\currentversion\\Internet Settings\\Connections");
    lret=RegOpenKeyEx(HKEY_CURRENT_USER,keyname3,NULL,
        KEY_READ|KEY_WRITE|KEY_SET_VALUE,&hk);
    if(lret==ERROR_SUCCESS&&NULL!=hk)
    {
        DWORD dwtype;
        char pbuf[256];
        DWORD dwlen=sizeof(pbuf);
        constchar* valname="Connection to adsl3";
        lret=RegQueryValueEx(hk,valname,NULL,&dwtype,pbuf,&dwlen);
        if(lret!=ERROR_SUCCESS)
        {
            ShowError(lret);
        }
        pbuf[8] = 3;//enable proxy
        pbuf[4]=pbuf[4]+1;
        constchar* p=m_sIEProxy.GetBuffer(1);
        memcpy(pbuf+16,p,m_sIEProxy.GetLength());
        char c=0;
        for(int i=m_sIEProxy.GetLength();i<20;i++)
            pbuf[16+i]=c;
        m_sIEProxy.ReleaseBuffer();
        lret=RegSetValueEx(hk,valname,NULL,REG_BINARY,pbuf,dwlen);
        RegCloseKey(hk);
    }
    DWORD dwret;
    SendMessageTimeout(HWND_BROADCAST,WM_SETTINGCHANGE,NULL,NULL,
        SMTO_NORMAL,1000,&dwret);
}

void CieproxyDlg::OnBnClickedDisableProxy()
{
    UpdateData();
    GetDlgItemText(IDC_EDIT1,m_sIEProxy);
    HKEY hk;
    LONG lret=RegOpenKeyEx(HKEY_CURRENT_USER,
        "Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings",
        NULL,KEY_WRITE|KEY_SET_VALUE,&hk);
    if(lret==ERROR_SUCCESS&&NULL!=hk)
    {
        DWORD dwenable=0;
        lret=RegSetValueEx(hk,"ProxyEnable",NULL,REG_DWORD,
            (LPBYTE)&dwenable,sizeof(dwenable));
        RegCloseKey(hk);
    }
    const TCHAR* keyname3=_T(
      "software\\Microsoft\\windows\\currentversion\\Internet Settings\\Connections");
    lret=RegOpenKeyEx(HKEY_CURRENT_USER,keyname3,
        NULL,KEY_READ|KEY_WRITE|KEY_SET_VALUE,&hk);
    if(lret==ERROR_SUCCESS&&NULL!=hk)
    {
        DWORD dwtype;
        char pbuf[256];
        DWORD dwlen=sizeof(pbuf);
        constchar* valname="Connection to adsl3";
        lret=RegQueryValueEx(hk,valname,NULL,&dwtype,pbuf,&dwlen);
        if(lret!=ERROR_SUCCESS)
        {
            ShowError(lret);
        }
        pbuf[8] = 1;//enable proxy
        pbuf[4]=pbuf[4]+1;
        lret=RegSetValueEx(hk,valname,NULL,REG_BINARY,pbuf,dwlen);
        RegCloseKey(hk);
    }
    DWORD dwret;
    SendMessageTimeout(HWND_BROADCAST,WM_SETTINGCHANGE,NULL,NULL,SMTO_NORMAL,
        1000,&dwret);
}

Problem with above code is that existing Internet Explorer instances don't know the change of settings. What is more, changing registry directly is not an elegant method. Then the following must be more attractive :

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BOOL SetConnectionOptions(LPCTSTR conn_name,LPCTSTR proxy_full_addr)
{
    //conn_name: active connection name. //proxy_full_addr : eg "210.78.22.87:8000"
    INTERNET_PER_CONN_OPTION_LIST list;
    BOOL    bReturn;
    DWORD   dwBufSize = sizeof(list);
    // Fill out list struct.
    list.dwSize = sizeof(list);
    // NULL == LAN, otherwise connectoid name.
    list.pszConnection = conn_name;
    // Set three options.
    list.dwOptionCount = 3;
    list.pOptions = new INTERNET_PER_CONN_OPTION[3];
    // Make sure the memory was allocated.if(NULL == list.pOptions)
    {
        // Return FALSE if the memory wasn't allocated.
        OutputDebugString("failed to allocat memory in SetConnectionOptions()");
        return FALSE;
    }
    // Set flags.
    list.pOptions[0].dwOption = INTERNET_PER_CONN_FLAGS;
    list.pOptions[0].Value.dwValue = PROXY_TYPE_DIRECT |
        PROXY_TYPE_PROXY;

    // Set proxy name.
    list.pOptions[1].dwOption = INTERNET_PER_CONN_PROXY_SERVER;
    list.pOptions[1].Value.pszValue = proxy_full_addr;//"http://proxy:80";// Set proxy override.
    list.pOptions[2].dwOption = INTERNET_PER_CONN_PROXY_BYPASS;
    list.pOptions[2].Value.pszValue = "local";

    // Set the options on the connection.
    bReturn = InternetSetOption(NULL,
        INTERNET_OPTION_PER_CONNECTION_OPTION, &list, dwBufSize);

    // Free the allocated memory.delete [] list.pOptions;
    InternetSetOption(NULL, INTERNET_OPTION_SETTINGS_CHANGED, NULL, 0);
    InternetSetOption(NULL, INTERNET_OPTION_REFRESH , NULL, 0);
    return bReturn;
}
BOOL DisableConnectionProxy(LPCTSTR conn_name)
{
    //conn_name: active connection name. 
    INTERNET_PER_CONN_OPTION_LIST list;
    BOOL    bReturn;
    DWORD   dwBufSize = sizeof(list);
    // Fill out list struct.
    list.dwSize = sizeof(list);
    // NULL == LAN, otherwise connectoid name.
    list.pszConnection = conn_name;
    // Set three options.
    list.dwOptionCount = 1;
    list.pOptions = new INTERNET_PER_CONN_OPTION[list.dwOptionCount];
    // Make sure the memory was allocated.if(NULL == list.pOptions)
    {
        // Return FALSE if the memory wasn't allocated.
        OutputDebugString("failed to allocat memory in DisableConnectionProxy()");
        return FALSE;
    }
    // Set flags.
    list.pOptions[0].dwOption = INTERNET_PER_CONN_FLAGS;
    list.pOptions[0].Value.dwValue = PROXY_TYPE_DIRECT  ;
    // Set the options on the connection.
    bReturn = InternetSetOption(NULL,
        INTERNET_OPTION_PER_CONNECTION_OPTION, &list, dwBufSize);
    // Free the allocated memory.delete [] list.pOptions;
    InternetSetOption(NULL, INTERNET_OPTION_SETTINGS_CHANGED, NULL, 0);
    InternetSetOption(NULL, INTERNET_OPTION_REFRESH , NULL, 0);
    return bReturn;
}

The usage is very straightforward:

				//set proxy
				const
				char* connection_name="Connection to adsl3";
    SetConnectionOptions(connection_name,"62.81.236.23:80");
//disable proxy 
    DisableConnectionProxy(connection_name);
    

Existing Internet Explorer instances are notified by INTERNET_OPTION_SETTINGS_CHANGED and INTERNET_OPTION_REFRESH

    好久没用VA了, 今天有人发了新版本1535, 就试了试, 先想用以前版本的code结果没有
成功. VA试用期一个月, 试用是全功能的, 这点还不错. 但是到期的话就不能继续了.这篇
短文的目的就是无限期扩展试用期, 使你能够尽情享受VA带来的快乐,  免去大家寻找破解
的痛苦,

    本来不想发的, Visual Assist X确实做得不错.如果觉得VA好用, 请支持正版, 呵呵.

    用到的工具: Registry Workshop, 附件中有一份.

    以下的内容参考了一些网上的文章, 另外有一些猜测的成分, 请自担风险.

    主要的方法就是消去VA记录下的一些安装及试用时间信息.VA记录这些信息的地方有三
个:

1) HKEY_LOCAL_MACHINE\SOFTWARE\Licenses

    这一个很好找. 建议加入Registry Workshop收藏夹.

2)
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{ACABBB00-02A4-CF3E-B293-188330493F10}

    {XXX...}对于不同的版本以及不同的机器可能不同, 比如
{ACABBB00-02A4-CF3E-B293-188330493F10}是我XP虚拟机上的值, 我实际机器上的是
{2401839D-8A0E-F7A3-3A39-201EB8E3078D}.

    要找到这一条, 就要用到Registry Workshop, 浏览至
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\, 然后所有条目按时间倒序排序, 与
Visual Assist安装时间差不多的那几个(3~10个吧, 跟具体机器有关, 还有其他的软件吧)
逐一检查, 有一个的子项不规则, 而其他的都比较规则. 如

{ACABBB00-02A4-CF3E-B293-188330493F10}
    fMNvzvRluw
    paowhf
    Jvielmgrzqpm
    durvuNbfybvH
    Psohy
    wqGi
    zydrzwfqWyFs
    InProcServer32

而其他的一般是
{XXXXXXXX...}
    Description
    InprocServer32
    ProgID
    VersionIndependentProgID

等等, 实际上目标项{ACABBB00-02A4-CF3E-B293-188330493F10}是VA的时间信息记录, 当然
只有VA的人知道它的格式了. 为掩人耳目, {ACABBB00-02A4-CF3E-B293-188330493F10} 又
合并另外的一个随机的已注册的CLSID, 因此当你看到
{ACABBB00-02A4-CF3E-B293-188330493F10} 下的 InprocServer32 好像是另外的某个感觉
很重要的东西, 我想, 如果你在 HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\ 下搜索的
话, 应该搜得到它真正的条目.

    找到
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{ACABBB00-02A4-CF3E-B293-188330493F10
}或者你机器上的相应项后, 建议加入收藏夹.

    3) 你的temp用户变量%USERPROFILE%\Local Settings\Temp 中的临时文件
1489AFE4.TMP.
如果你的Temp用户变量设置到了其他的地方(比如, 我的在F:\Temp\UTemp), 请到相应的位
置找到这个文件, 这个文件的修改时间和创建时间都与VA安装时间相差不多. 相信不难找到
. 具体的文件名可能和版本相关.
当然也可以把此目录全部清空, 一般情况下应该没有什么问题.

    以上三处记录的信息应该是一样的, 破解时留下任何一处都不能成功. 卸载VA时, 这三
处的信息都保留着, 卸载VA然后重装的办法是行不通的. 就算重装系统, 如果你把temp用户
变量目录设到以前的位置且没有清理过, 则注册表是全新的估计也无济于事.

    下面给一个简单的批处理的例子, 可能需要根据自己的情况和版本修改其中的一些数据

    VAClean运行时请关闭Visual Studio

####################### VAClean.cmd 开始 #######################

@echo off

rem 此两项请自行填写为合适的值
set cid={2401839D-8A0E-F7A3-3A39-201EB8E3078D}
set tpf="F:\Temp\UTemp\1489AFE4.TMP"

reg delete HKEY_LOCAL_MACHINE\SOFTWARE\Licenses /f
reg delete HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\%cid% /f
del /q %tpf%

echo.
pause

####################### VAClean.cmd 结束 #######################

以上测试基于
Visual Assist X 10.3.1535.0
Visual Assist X 10.3.1534.0 (此方法以前的版本以及以后的若干个版本可能有效)
以及
Visual C++ 6
Visual Studio 2005
以及
XP SP2

下载:
http://www.wholetomato.com/downloads/VA_X_Setup1301.exe
http://www.wholetomato.com/downloads/VA_X_Setup1534.exe
http://www.wholetomato.com/downloads/VA_X_Setup1535.exe

--

※ 来源:·水木社区 http://newsmth.net·[FROM: 166.111.86.*]

附件: Registry_Workshop.rar (388 KB) 链接:
http://www.newsmth.net/att.php?p.99.950977.3575.rar
全文链接：http://www.newsmth.net/bbscon.php?bid=99&id=950977

Trackback: http://tb.blog.csdn.net/TrackBack.aspx?PostId=1258267

编写自己的一个ping程序,可以说是许多人迈出网络编程的第一步吧!!这个ping程序的源代码经过我的修改和调试,基本上可以取代windows中自带的ping程序. 各个模块后都有我的详细注释和修改日志,希望能够对大家的学习有所帮助!!

/*  本程序的主要源代码来自MSDN网站, 笔者只是做了一些改进和注释! 另外需要注意的是在Build之前,必须加入ws2_32.lib库文件,否则会提示"error LNK2001:"的错误！*/

/******************************************************************************\
| Version 1.1 修改记录:                                                                                                              |
|    <1> 解决了socket阻塞的问题,从而能够正确地处理超时的请求!                                                        |
|----------------------------------------------------------------------------------------------------|
| Version 1.2 修改记录:                                                                                                              |
|    <1> 增加了由用户控制发送ICMP包的数目的功能(即命令的第二个参数).                                              |   
|    <2> 增加了对ping结果的统计功能.                                                                                           |
\******************************************************************************/

#pragma pack(4)

#include
#include
#include

#define ICMP_ECHO 8
#define ICMP_ECHOREPLY 0

#define ICMP_MIN 8 // minimum 8 byte icmp packet (just header)

/* The IP header */
typedef struct iphdr {
unsigned int h_len:4; // length of the header
unsigned int version:4; // Version of IP
unsigned char tos; // Type of service
unsigned short total_len; // total length of the packet
unsigned short ident; // unique identifier
unsigned short frag_and_flags; // flags
unsigned char ttl;
unsigned char proto; // protocol (TCP, UDP etc)
unsigned short checksum; // IP checksum

unsigned int sourceIP;
unsigned int destIP;

}IpHeader;

//
// ICMP header
//
typedef struct icmphdr {
BYTE i_type;
BYTE i_code; /* type sub code */
USHORT i_cksum;
USHORT i_id;
USHORT i_seq;
/* This is not the std header, but we reserve space for time */
ULONG timestamp;
}IcmpHeader;

#define STATUS_FAILED 0xFFFF
#define DEF_PACKET_SIZE    32
#define DEF_PACKET_NUMBER  4    /* 发送数据报的个数 */
#define MAX_PACKET 1024

#define xmalloc(s) HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,(s))
#define xfree(p) HeapFree (GetProcessHeap(),0,(p))

void fill_icmp_data(char *, int);
USHORT checksum(USHORT *, int);
int decode_resp(char *,int ,struct sockaddr_in *);

void Usage(char *progname){

fprintf(stderr,"Usage:\n");
fprintf(stderr,"%s [number of packets] [data_size]\n",progname);
fprintf(stderr,"datasize can be up to 1Kb\n");
ExitProcess(STATUS_FAILED);

}
int main(int argc, char **argv){

WSADATA wsaData;
SOCKET sockRaw;
struct sockaddr_in dest,from;
struct hostent * hp;
int bread,datasize,times;
int fromlen = sizeof(from);
int timeout = 1000;
int statistic = 0;  /* 用于统计结果 */ 
char *dest_ip;
char *icmp_data;
char *recvbuf;
unsigned int addr=0;
USHORT seq_no = 0;

if (WSAStartup(MAKEWORD(2,1),&wsaData) != 0){
fprintf(stderr,"WSAStartup failed: %d\n",GetLastError());
ExitProcess(STATUS_FAILED);
}

if (argc <2 ) {
Usage(argv[0]);
}
sockRaw = WSASocket(AF_INET,SOCK_RAW,IPPROTO_ICMP,NULL, 0,WSA_FLAG_OVERLAPPED);

//
//注：为了使用发送接收超时设置(即设置SO_RCVTIMEO, SO_SNDTIMEO)，
//    必须将标志位设为WSA_FLAG_OVERLAPPED !
//

if (sockRaw == INVALID_SOCKET) {
fprintf(stderr,"WSASocket() failed: %d\n",WSAGetLastError());
ExitProcess(STATUS_FAILED);
}
bread = setsockopt(sockRaw,SOL_SOCKET,SO_RCVTIMEO,(char*)&timeout,
sizeof(timeout));
if(bread == SOCKET_ERROR) {
fprintf(stderr,"failed to set recv timeout: %d\n",WSAGetLastError());
ExitProcess(STATUS_FAILED);
}
timeout = 1000;
bread = setsockopt(sockRaw,SOL_SOCKET,SO_SNDTIMEO,(char*)&timeout,
sizeof(timeout));
if(bread == SOCKET_ERROR) {
fprintf(stderr,"failed to set send timeout: %d\n",WSAGetLastError());
ExitProcess(STATUS_FAILED);
}
memset(&dest,0,sizeof(dest));

hp = gethostbyname(argv[1]);

if (!hp){
addr = inet_addr(argv[1]);
}
if ((!hp) && (addr == INADDR_NONE) ) {
fprintf(stderr,"Unable to resolve %s\n",argv[1]);
ExitProcess(STATUS_FAILED);
}

if (hp != NULL)
memcpy(&(dest.sin_addr),hp->h_addr,hp->h_length);
else
dest.sin_addr.s_addr = addr;

if (hp)
dest.sin_family = hp->h_addrtype;
else
dest.sin_family = AF_INET;

dest_ip = inet_ntoa(dest.sin_addr);

//
//  atoi函数原型是: int atoi( const char *string );
//  The return value is 0 if the input cannot be converted to an integer !
//
if(argc>2)
{
 times=atoi(argv[2]);
 if(times == 0)
  times=DEF_PACKET_NUMBER;
}
else
    times=DEF_PACKET_NUMBER;

if (argc >3)
{
 datasize = atoi(argv[3]);
    if (datasize == 0)
        datasize = DEF_PACKET_SIZE;
 if (datasize >1024)   /* 用户给出的数据包大小太大 */
 {
  fprintf(stderr,"WARNING : data_size is too large !\n");
  datasize = DEF_PACKET_SIZE;
 }
}
else
    datasize = DEF_PACKET_SIZE;

datasize += sizeof(IcmpHeader);

icmp_data = (char*)xmalloc(MAX_PACKET);
recvbuf = (char*)xmalloc(MAX_PACKET);

if (!icmp_data) {
fprintf(stderr,"HeapAlloc failed %d\n",GetLastError());
ExitProcess(STATUS_FAILED);
}

memset(icmp_data,0,MAX_PACKET);
fill_icmp_data(icmp_data,datasize);

//
//显示提示信息
//
fprintf(stdout,"\nPinging %s ....\n\n",dest_ip);

for(int i=0;i{
int bwrote;

((IcmpHeader*)icmp_data)->i_cksum = 0;
((IcmpHeader*)icmp_data)->timestamp = GetTickCount();

((IcmpHeader*)icmp_data)->i_seq = seq_no++;
((IcmpHeader*)icmp_data)->i_cksum = checksum((USHORT*)icmp_data,datasize);

bwrote = sendto(sockRaw,icmp_data,datasize,0,(struct sockaddr*)&dest,sizeof(dest));
if (bwrote == SOCKET_ERROR){
if (WSAGetLastError() == WSAETIMEDOUT) {
printf("Request timed out.\n");
continue;
}
fprintf(stderr,"sendto failed: %d\n",WSAGetLastError());
ExitProcess(STATUS_FAILED);
}
if (bwrote < datasize ) {
fprintf(stdout,"Wrote %d bytes\n",bwrote);
}
bread = recvfrom(sockRaw,recvbuf,MAX_PACKET,0,(struct sockaddr*)&from,&fromlen);
if (bread == SOCKET_ERROR){
if (WSAGetLastError() == WSAETIMEDOUT) {
printf("Request timed out.\n");
continue;
}
fprintf(stderr,"recvfrom failed: %d\n",WSAGetLastError());
ExitProcess(STATUS_FAILED);
}
if(!decode_resp(recvbuf,bread,&from))
 statistic++; /* 成功接收的数目++ */
Sleep(1000);

}
 
/*
Display the statistic result
*/
fprintf(stdout,"\nPing statistics for %s \n",dest_ip);
fprintf(stdout,"    Packets: Sent = %d,Received = %d, Lost = %d (%2.0f%% loss)\n",times,
     statistic,(times-statistic),(float)(times-statistic)/times*100);

WSACleanup();
return 0;

}
/*
The response is an IP packet. We must decode the IP header to locate
the ICMP data
*/
int decode_resp(char *buf, int bytes,struct sockaddr_in *from) {

IpHeader *iphdr;
IcmpHeader *icmphdr;
unsigned short iphdrlen;

iphdr = (IpHeader *)buf;

iphdrlen = (iphdr->h_len) * 4 ; // number of 32-bit words *4 = bytes

if (bytes < iphdrlen + ICMP_MIN) {
printf("Too few bytes from %s\n",inet_ntoa(from->sin_addr));
}

icmphdr = (IcmpHeader*)(buf + iphdrlen);

if (icmphdr->i_type != ICMP_ECHOREPLY) {
fprintf(stderr,"non-echo type %d recvd\n",icmphdr->i_type);
return 1;
}
if (icmphdr->i_id != (USHORT)GetCurrentProcessId()) {
fprintf(stderr,"someone else's packet!\n");
return 1;
}
printf("%d bytes from %s:",bytes, inet_ntoa(from->sin_addr));
printf(" icmp_seq = %d. ",icmphdr->i_seq);
printf(" time: %d ms ",GetTickCount()-icmphdr->timestamp);
printf("\n");
return 0;

}

USHORT checksum(USHORT *buffer, int size) {

unsigned long cksum=0;

while(size >1) {
cksum+=*buffer++;
size -=sizeof(USHORT);
}

if(size) {
cksum += *(UCHAR*)buffer;
}

cksum = (cksum >> 16) + (cksum & 0xffff);
cksum += (cksum >>16);
return (USHORT)(~cksum);
}
/*
Helper function to fill in various stuff in our ICMP request.
*/
void fill_icmp_data(char * icmp_data, int datasize){

IcmpHeader *icmp_hdr;
char *datapart;

icmp_hdr = (IcmpHeader*)icmp_data;

icmp_hdr->i_type = ICMP_ECHO;
icmp_hdr->i_code = 0;
icmp_hdr->i_id = (USHORT)GetCurrentProcessId();
icmp_hdr->i_cksum = 0;
icmp_hdr->i_seq = 0;

datapart = icmp_data + sizeof(IcmpHeader);
//
// Place some junk in the buffer.
//
memset(datapart,'E', datasize - sizeof(IcmpHeader));

}

/******************* 附: ping命令执行时显示的画面 ***************\
*  C:\Documents and Settings\houzhijiang>ping 236.56.54.12               *
*                                                                                                      *
*  Pinging 236.56.54.12 with 32 bytes of data:                                      *
*                                                                                                      *
*  Request timed out.                                                                         *
*  Request timed out.                                                                         *
*  Request timed out.                                                                         *
*  Request timed out.                                                                         *
*                                                                                                      *
*  Ping statistics for 236.56.54.12:                                                      *
*     Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),                  *
*                                                                                                      *
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*  C:\Documents and Settings\houzhijiang>ping 127.0.0.1                    *
*                                                                                                     *
*  Pinging 127.0.0.1 with 32 bytes of data:                                          *
*                                                                                                     *
*  Reply from 127.0.0.1: bytes=32 time<1ms TTL=128                        *
*  Reply from 127.0.0.1: bytes=32 time<1ms TTL=128                        *
*  Reply from 127.0.0.1: bytes=32 time<1ms TTL=128                        *
*  Reply from 127.0.0.1: bytes=32 time<1ms TTL=128                        *
*                                                                                                     *
*  Ping statistics for 127.0.0.1:                                                          *
*     Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),                    *
*  Approximate round trip times in milli-seconds:                                 *
*     Minimum = 0ms, Maximum = 0ms, Average = 0ms                        *
*                                                                                                    *
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