有趣的ping-----小记

                                                                            有趣的ping-----小记

前言:    说是小记，当然文章很短啦。 你应当熟悉的工具是winpcap

前几日，偶尔在看网络的书，好奇的用winpcap去构造了一个假冒的ping，就是icmp包拉。满心欢喜等着那台电脑上当，哪里知道，他连屁都没放一个。（事实上，那个家伙还是有反应的，容我稍候叙述） 要知道，如果我在cmd中ping的话，他可是老老实实的回话哦。

一些参数: 

我的ip:  172.16.99.3               我把我的ip改成了 172.16.99.2 (有人说，为什么不改mac，其实是自便的啦。)

那个家伙的ip:  172.16.0.100      

部分程式：

BYTE  packet[100];
 memset( packet,0, sizeof(packet) );
   
 P_MAC_HEADER pMacHdr = (P_MAC_HEADER)(BYTE*)packet;
 pMacHdr->type = 0x0008;//IP PACKET

 pMacHdr->dmac[0] = 0x00;
 pMacHdr->dmac[1] = 0x27;
 pMacHdr->dmac[2] = 0x4;
 pMacHdr->dmac[3] = 0x22;
 pMacHdr->dmac[4] = 0x64;
 pMacHdr->dmac[5] = 0xe;

 pMacHdr->smac[0] = 0x00;
 pMacHdr->smac[1] = 0x04;
 pMacHdr->smac[2] = 0x90;
 pMacHdr->smac[3] = 0x46;
 pMacHdr->smac[4] = 0x21;
 pMacHdr->smac[5] = 0xbe;

 P_IP_HEADER pIpHdr = (P_IP_HEADER)((BYTE*)(packet)+sizeof(MAC_HEADER));
 
 pIpHdr->crc             = 0;
 pIpHdr->daddr.byte1     = 172;
 pIpHdr->daddr.byte2     = 16;
 pIpHdr->daddr.byte3     = 0;
 pIpHdr->daddr.byte4     = 100;
 pIpHdr->saddr.byte1     = 172;
 pIpHdr->saddr.byte2     = 16;
 pIpHdr->saddr.byte3     = 99;
 pIpHdr->saddr.byte4     = 2;

 pIpHdr->flags_fo        = 0;
 pIpHdr->identification  = 0x3456;
 pIpHdr->proto           = IPPROTO_ICMP;
 pIpHdr->tlen            = htons(60);//htons(sizeof(IP_HEADER)+sizeof(ICMP_HEADER));
 pIpHdr->tos             = 0;
 pIpHdr->ttl             = 128;
 pIpHdr->ver_ihl         = (4<<4) | ( sizeof(IP_HEADER)/sizeof(DWORD) );
 

 P_ICMP_HEADER pIcmpHdr = (P_ICMP_HEADER)((BYTE*)(pIpHdr)+sizeof(IP_HEADER));
 
 pIcmpHdr->type          = ICMP_PING_REQUEST;
 pIcmpHdr->operation     = 0;
 pIcmpHdr->ping.spec     = 0x2;
 pIcmpHdr->ping.seq      = 0x8;
 pIcmpHdr->crc           = 0;
   
 pIpHdr->crc   =  CalculateCRC( (BYTE*)pIpHdr, (pIpHdr->ver_ihl&0xF)*4 );
 pIcmpHdr->crc =  CalculateCRC( (BYTE*)pIcmpHdr, sizeof(ICMP_HEADER) );

    packetSize = 60+14;

  if( pcap_sendpacket( adapterHandle, packet, packetSize ) != 0 )
 {
        fprintf(stderr,"\nError sending the packet: \n", pcap_geterr(adapterHandle));
        return 0;

}

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