原始套接字编写Sniffer失败??

希望有过原始套接字编程经验的朋友帮忙看一下:

#include <stdio.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#pragma comment (lib,"ws2_32.lib")
//#define SIO_RCVALL 0x98000001
#define SIO_RCVALL _WSAIOW(IOC_VENDOR,1)
void main()
{
    SOCKET Sniffer;
    int timeout=1000;//接收超时
    struct sockaddr_in addr;
    DWORD dwret=0;
    WSADATA wsa;
    int ret,i;
    BOOL flag=TRUE;
    char RecvBuf[6144];//6KB的接收缓冲区
    if(WSAStartup(MAKEWORD(2,1),&wsa))
    {
        printf("套接字版本协商出错!\n");
        return;
    }
    Sniffer=socket(AF_INET,SOCK_RAW,IPPROTO_RAW);//创建原始套接字
    if(INVALID_SOCKET ==Sniffer)
    {
        printf("创建套接字失败!\n");
        return;
    }
    setsockopt(Sniffer, IPPROTO_IP, IP_HDRINCL, (char*)&flag, sizeof(flag)); //设置 IP 头操作选项
    //设置套接字接收超时
    if(SOCKET_ERROR ==setsockopt(Sniffer,SOL_SOCKET,SO_RCVTIMEO,(char*)&timeout,sizeof(timeout)))
    {
        printf("设置套接字超时失败!\n");
        closesocket(Sniffer);
        WSACleanup();
        return;
    }
    memset(&addr,0,sizeof(addr));
    addr.sin_family=AF_INET;
    //设置本地地址
    addr.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");
    //设置监听端口
    addr.sin_port=htons(1234);
    //绑定端口
    if(SOCKET_ERROR==bind(Sniffer,(struct sockaddr *)&addr,sizeof(addr)))
    {
        printf("绑定本地端口失败!错误号:%d\n",WSAGetLastError());
        closesocket(Sniffer);
        WSACleanup();
        return;
    }
    if(SOCKET_ERROR==ioctlsocket(Sniffer, SIO_RCVALL, (unsigned long*)&dwret))
    {
        printf("设置Socket I/O模式出错!\n");
        closesocket(Sniffer);
        WSACleanup();
        return;
    }
    //循环接收数据
    while(1)
    {
        ret=recv(Sniffer, RecvBuf,sizeof( RecvBuf),0);
        if(SOCKET_ERROR==ret)
        {
            if(WSAETIMEDOUT==WSAGetLastError())continue;
            printf("接收数据包出错!\n");
            closesocket(Sniffer);
            return;
        }
        i++;
        printf("接收到数据包%d",i);
    }
    WSACleanup();
    return;
}
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顶顶顶顶顶
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搞那么多==干什么？
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暂时看不懂，帮你顶一下
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各位 帮帮忙呀?
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晕 我相信一定有人有这方面的经验的
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不太懂,帮你托起来.
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