伪装飞秋发送者version3: 添加中文字符集转换，添加飞鸽传书操作符enum头文件
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@ -5,6 +5,14 @@
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UDP -> 8
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UDP 数据报数据部分
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*/
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// 伪装飞秋数据报(UDP)
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// 1. 伪装飞秋数据报的源IP和目的IP
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// 2. 伪装飞秋数据报的源端口和目的端口
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// 3. 伪装飞秋数据报的校验和
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// 4. 伪装飞秋数据报的数据部分
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// 5. 伪装飞秋数据报的长度
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <netinet/ether.h>
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@ -20,9 +28,14 @@
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdlib.h> // system
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#include <iconv.h> // iconv， 用于转换编码
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#include "fake_feiqiu_head.h"
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ssize_t send_datapacket(int fd, unsigned char *buf, ssize_t buf_size, const char *ether_name);
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unsigned short checksum(unsigned short *buf, int len);
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char *convertToUTF8(const char *str); // 将字符串转换为UTF-8编码
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char *convertToGB2312(const char *str); // 将字符串转换为GB2312编码
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// 伪头部(UDP 校验时需要再 UDP 报文之间加上伪头部)
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typedef struct pseudo_udp_head_struct
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@ -43,21 +56,11 @@ int main(int argc, char const *argv[])
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perror("raw socket");
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return -1;
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}
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/*
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// 网卡结构体
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struct ifreq ether_req; // 网卡接口请求结构体
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strncpy(ether_req.ifr_name, "ens34", IFNAMSIZ); // 指定网卡名字, IFNAMESIZ 是接口网卡的名字大小
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// 如果网卡不存在，返回错误，否则返回网卡接口索引
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if (ioctl(sock_fd, SIOCGIFINDEX, ðer_req) == -1)
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{
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perror("ioctl");
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return -1;
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}
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// 发送接口的结构体
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struct sockaddr_ll sll; // 网络层套接字地址结构体
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bzero(&sll, sizeof(sll));
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sll.sll_ifindex = ether_req.ifr_ifindex; // 将网卡的接口类型赋值给发送接口 */
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// 设置网卡名
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char eth_name[128] = "";
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printf("请输入要伪装的网卡名: ");
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scanf("%s", eth_name);
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char sender_ip[128] = "";
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printf("请输入要伪装的发送者IP: ");
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@ -93,13 +96,6 @@ int main(int argc, char const *argv[])
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unsigned char udp_buf[1500] = ""; // UDP 数据报
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// 伪装飞秋数据报(UDP)
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// 1. 伪装飞秋数据报的源IP和目的IP
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// 2. 伪装飞秋数据报的源端口和目的端口
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// 3. 伪装飞秋数据报的校验和
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// 4. 伪装飞秋数据报的数据部分
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// 5. 伪装飞秋数据报的长度
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// 伪装飞秋数据报的数据部分
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// char msg_data[1024] = "1_lbt6_47#128#704D7B3F6397#0#0#0#4001#9:1694470508:chai:chai:32:hi liangzai";
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char msg_data[1024] = "";
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@ -108,6 +104,7 @@ int main(int argc, char const *argv[])
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// scanf("%s", say_what);
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fgets(say_what, sizeof(say_what), stdin); // 比 scanf 的优点是可以输入空格
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say_what[strlen(say_what) - 1] = '\0'; // 去掉最后的换行符
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if (strcmp(say_what, "exit") == 0)
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{
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break;
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@ -117,26 +114,10 @@ int main(int argc, char const *argv[])
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system("clear");
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continue;
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}
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/* if (strncpy(say_what, "change", 6) == 0)
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{
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printf("请输入要伪装的发送者名字：");
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scanf("%s", sender_name);
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printf("请输入要伪装的发送者电脑名字：");
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scanf("%s", sender_pc_name);
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continue;
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}
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if (strncmp(say_what, "help", 4) == 0)
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{
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printf("请输入要发送的内容：\n");
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printf("1. 输入exit退出\n");
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printf("2. 输入clear清屏\n");
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printf("3. 输入change更改伪装信息\n");
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continue;
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} */
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sprintf(msg_data, "1:%d:%s:%s:%d:%s", 123, sender_name, sender_pc_name, 32, say_what);
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sprintf(msg_data, "1:%d:%s:%s:%d:%s", 123, convertToGB2312(sender_name), convertToGB2312(sender_pc_name), IPMSG_SENDMSG, convertToGB2312(say_what));
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int msg_data_len = strlen(msg_data) + strlen(msg_data) % 2; // 整数补齐偶数位，strlen(msg_data)%2 : 偶数+0，奇数+1
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printf("msg_data_len = %d ---> %s\n", msg_data_len, msg_data);
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printf("msg_data_len = %d ---> %s\n", msg_data_len, convertToUTF8(msg_data));
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/* ---------------------组装 UDP 数据报的 UDP 首部--------------------- */
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struct udphdr *udp_head = (struct udphdr *)(udp_buf + 14 + 20); // UDP 首部开始位置
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@ -151,8 +132,6 @@ int main(int argc, char const *argv[])
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UDP 校验中的伪头部（pseudo header）是在计算 UDP 校验和时使用的辅助数据。伪头部包含了源 IP 地址、目的 IP 地址、协议类型（通常是 UDP）和 UDP 报文长度等信息。
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在计算 UDP 校验和时，将伪头部和 UDP 报文的内容拼接在一起，然后计算校验和。这样做的目的是增加校验和的安全性，使其更具可靠性。
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*/
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// 196: 4c:e1:73:47:16:3a
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// 158: e8:d8:d1:48:46:ae
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unsigned char pseudo_udp_buf[1056] = ""; // 伪头部
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PSEUDO_UDP_HEAD *pseudo_udp_head = (PSEUDO_UDP_HEAD *)pseudo_udp_buf;
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@ -195,7 +174,7 @@ int main(int argc, char const *argv[])
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/* ---------------------发送数据--------------------- */
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// int send_len = sendto(sock_fd, udp_buf, 14 + 20 + 8 + msg_data_len, 0, (struct sockaddr *)&sll, sizeof(sll));
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int send_len = send_datapacket(sock_fd, udp_buf, 14 + 20 + 8 + msg_data_len, "ens38");
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int send_len = send_datapacket(sock_fd, udp_buf, 14 + 20 + 8 + msg_data_len, eth_name);
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printf("send_len = %d\n", send_len);
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}
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@ -246,4 +225,86 @@ unsigned short checksum(unsigned short *buf, int len)
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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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}
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// 将字符串转换为UTF-8编码
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char *convertToUTF8(const char *str)
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{
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// 输入字符串的长度
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size_t inlen = strlen(str);
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// 输出缓冲区的长度，假设为输入长度的3倍（UTF-8编码最多占用3个字节）
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size_t outlen = inlen * 3;
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// 创建转换句柄
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iconv_t cd = iconv_open("UTF-8", "GB2312"); // 从 GB2312 转换为 UTF-8
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// 分配输出缓冲区
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char *outbuf = (char *)malloc(outlen);
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if (outbuf == NULL)
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{
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perror("Memory allocation failed");
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return NULL;
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}
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// 进行转换
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char *inbuf = (char *)str;
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char *outptr = outbuf;
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if (iconv(cd, &inbuf, &inlen, &outptr, &outlen) == (size_t)-1)
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{
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perror("Conversion failed");
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free(outbuf);
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iconv_close(cd);
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return NULL;
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}
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// 关闭转换句柄
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iconv_close(cd);
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// 添加字符串结束符
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*outptr = '\0';
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return outbuf;
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}
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// 将字符串转换为GB2312编码
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char *convertToGB2312(const char *str)
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{
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// 输入字符串的长度
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size_t inlen = strlen(str);
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// 输出缓冲区的长度，假设为输入长度的3倍（UTF-8编码最多占用3个字节）
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size_t outlen = inlen * 3;
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// 创建转换句柄
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iconv_t cd = iconv_open("GB2312", "UTF-8"); // 从 UTF-8 转换为 GB2312
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// 分配输出缓冲区
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char *outbuf = (char *)malloc(outlen);
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if (outbuf == NULL)
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{
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perror("Memory allocation failed");
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return NULL;
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}
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// 进行转换
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char *inbuf = (char *)str;
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char *outptr = outbuf;
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if (iconv(cd, &inbuf, &inlen, &outptr, &outlen) == (size_t)-1)
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{
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perror("Conversion failed");
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free(outbuf);
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iconv_close(cd);
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return NULL;
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}
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// 关闭转换句柄
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iconv_close(cd);
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// 添加字符串结束符
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*outptr = '\0';
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return outbuf;
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}
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@ -0,0 +1,33 @@
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#ifndef __FAKE_FEIQIU_HEAD_H__
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#define __FAKE_FEIQIU_HEAD_H__
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enum ipmsg_e
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{
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IPMSG_NOOPERATION = 0x00000000,
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IPMSG_BR_ENTRY = 0x00000001,
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IPMSG_BR_EXIT = 0x00000002,
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IPMSG_ANSENTRY = 0x00000003,
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IPMSG_BR_ABSENCE = 0x00000004,
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IPMSG_BR_ISGETLIST = 0x00000010,
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IPMSG_OKGETLIST = 0x00000011,
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IPMSG_GETLIST = 0x00000012,
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IPMSG_ANSLIST = 0x00000013,
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IPMSG_FILE_MTIME = 0x00000014,
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IPMSG_FILE_CREATETIME = 0x00000016,
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IPMSG_BR_ISGETLIST2 = 0x00000018,
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IPMSG_SENDMSG = 0x00000020,
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IPMSG_RECVMSG = 0x00000021,
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IPMSG_READMSG = 0x00000030,
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IPMSG_DELMSG = 0x00000031,
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/* option for all command */
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IPMSG_ABSENCEOPT = 0x00000100,
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IPMSG_SERVEROPT = 0x00000200,
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IPMSG_DIALUPOPT = 0x00010000,
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IPMSG_FILEATTACHOPT = 0x00200000
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};
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#endif
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