c-router-emulator/router/router.c

256 lines
7.6 KiB
C
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#include "router.h"
#include "db.h"
#include "net_task_thread.h"
int main(int argc, char const *argv[])
{
// 初始化
net_init(); // 初始化网络和数据库
// 打开菜单
menu_choice();
// pthread_t thread_net_task;
// pthread_create(&thread_net_task, NULL, net_task, NULL);
// pthread_join(thread_net_task, NULL);
// close(sockfd); // 关闭原始套接字
close_mysql(); // 关闭数据库连接
// // 关闭网络设备
// pcap_close(device1);
// pcap_close(device2);
return 0;
}
void net_init()
{
// 创建原始套接字
// sockfd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); // 参数列表:协议族、套接字类型、协议类型
// if (sockfd < 0)
// {
// perror("socket");
// exit(-1);
// }
// 数据连接测试
if (connect_mysql("localhost", 3306, "flykhan", "1202", "router") == 0)
printf("数据库连接成功\n");
else
printf("数据库连接错误\n");
}
// MySQL 测试
int is_blocked_ip(unsigned char *ip)
{
char sql[1024] = "";
sprintf(sql, "select * from ip_fw where ip = '%s'", ip);
int rows = result_rows(sql);
printf("打印 %s\n", sql);
printf("rows: %d\n", rows);
// execlp("iptables", "iptables", "-A", "FORWARD", "-s", ip, "-j", "DROP", NULL); // 将源IP地址加入防火墙
execlp("iptables", "iptables", "-D", "FORWARD", "-s", ip, "-j", "DROP", NULL); // 将源IP地址加入防火墙
// 获取行数
if (rows > 0)
{
printf("IP地址 %s 在黑名单中\n", ip);
// execlp("iptables", "iptables", "-A", "FORWARD", "-s", ip, "-j", "DROP", NULL); // 将源IP地址加入防火墙
// 从防火墙删除
execlp("iptables", "iptables", "-D", "FORWARD", "-s", ip, "-j", "DROP", NULL); // 将源IP地址加入防火墙
return 0;
}
else
{
printf("IP地址 %s 不在黑名单中\n", ip);
return -1;
}
}
void show()
{
printf("**************************************************\n");
printf("** **\n");
printf("** 模拟路由后端管理系统 **\n");
printf("** **\n");
printf("** 1.添加黑名单IP **\n");
printf("** 2.显示所有黑名单 **\n");
printf("** 3.删除黑名单 **\n");
printf("** 4.开启路由器 **\n");
printf("** 5.刷新ARP表缓存 **\n");
printf("** 6.显示所有ARP表缓存 **\n");
printf("** 9.重新打印菜单 **\n");
printf("** 0.退出此系统 **\n");
printf("** **\n");
printf("**************************************************\n");
printf("********** 版权所有 FLY-NOOB **********\n");
printf("**************************************************\n");
}
// 判断IP地址格式是否正确
int is_ip_valid(const char *ip)
{
regex_t regex; // 正则表达式
int ret;
// 编译正则表达式
// /^((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.){3}(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])(?::(?:[0-9]|[1-9][0-9]{1,3}|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5]))?$/
ret = regcomp(&regex, "^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$", REG_EXTENDED); // REG_EXTENDED 扩展正则表达式
if (ret != 0)
{
printf("regcomp error\n");
return -1;
}
// 执行正则表达式
ret = regexec(&regex, ip, 0, NULL, 0);
regfree(&regex); // 释放正则表达式
if (ret == 0)
{
printf("IP地址格式正确\n");
return 0;
}
else if (ret == REG_NOMATCH)
{
printf("IP地址格式非法\n");
return -1;
}
else
{
printf("正则表达式匹配错误\n");
return -1;
}
}
// 发送ARP请求方法
// 后台菜单
void menu_choice()
{
// 选择标志位
int choice = 0;
show(); // 打印菜单
int pthread_flag = 0;
while (1)
{
printf("请输入你的选择: \n");
scanf("%d", &choice);
getchar(); // 清空缓冲区
// 后端添加黑名单 ip
if (1 == choice)
{
char add_blacked_ip[INET_ADDRSTRLEN] = "";
printf("请输入要添加的黑名单IP格式如 192.168.6.5\n");
fgets(add_blacked_ip, sizeof(add_blacked_ip), stdin);
add_blacked_ip[strlen(add_blacked_ip) - 1] = '\0'; // 将最后的换行符替换为字符串结束符
printf("add_blacked_ip: %s\n", add_blacked_ip);
// IP 格式检查
if (is_ip_valid(add_blacked_ip) != 0)
{
printf("IP地址格式错误\n");
continue;
}
// 查询数据库黑名单IP表中是否已存在此IP
int ret = search_ip_fw(add_blacked_ip);
if (ret > 0)
{
printf("黑名单中已存在此IP\n");
continue;
}
// 将IP地址加入黑名单
insert_ip_fw(add_blacked_ip);
}
// 后端查询黑名单 ip
else if (2 == choice)
{
// 打印黑名单
print_ip_fw();
}
// 后端删除黑名单 ip
else if (3 == choice)
{
char delete_blacked_ip[INET_ADDRSTRLEN] = "";
printf("请输入要删除的黑名单IP格式如 192.168.6.5\n");
fgets(delete_blacked_ip, sizeof(delete_blacked_ip), stdin);
delete_blacked_ip[strlen(delete_blacked_ip) - 1] = '\0'; // 将最后的换行符替换为字符串结束符
// IP 格式检查
if (is_ip_valid(delete_blacked_ip) != 0)
{
printf("IP地址格式错误\n");
continue;
}
// 查询数据库黑名单IP表中是否已存在此IP
int ret = search_ip_fw(delete_blacked_ip);
if (ret > 0)
{
printf("delete_blacked_ip: %s\n", delete_blacked_ip);
// 将IP地址从黑名单中删除
delete_ip_fw(delete_blacked_ip);
}
else
{
printf("黑名单中不存在此IP\n");
}
}
else if (4 == choice)
{
if (0 == pthread_flag)
{
printf("开启路由器\n");
pthread_flag += 1; // 线程标志位修改
pthread_t thread_net_task;
pthread_create(&thread_net_task, NULL, net_task, NULL);
pthread_detach(thread_net_task);
}
else
{
printf("路由器正在运行......\n");
}
}
else if (5 == choice)
{
}
// 显示 ARP 表
else if (6 == choice)
{
printf("ARP 表如下:\n");
const char *select_arp_result_sql = "select * from ip_mac";
query(select_arp_result_sql, printResult);
}
// 重新打印菜单
else if (9 == choice)
{
show();
}
// 退出此系统
else if (0 == choice)
{
printf("退出此系统\n");
return;
}
else
{
printf("输入错误,请重新输入\n");
}
}
}