aixiao
9421d1f1eb
修改： Makefile 修改： README.md 修改： conf.c 修改： conf.h 修改： denyhosts.sh 修改： libiptc.c 修改： libiptc.h 修改： rhost.c 修改： rhost.conf 修改： rhost.h
399 lines
11 KiB
C
399 lines
11 KiB
C
#include "conf.h"
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#include "rhost.h"
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#include "libiptc.h"
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// 存储公网IP
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char *public_ip;
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struct MemoryStruct {
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char *memory;
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size_t size;
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};
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static size_t WriteMemoryCallback(void *contents, size_t size, size_t nmemb, void *userp)
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{
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size_t realsize = size * nmemb;
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struct MemoryStruct *mem = (struct MemoryStruct *)userp;
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// 注意这里根据每次被调用获得的数据重新动态分配缓存区的大小
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char *ptr = realloc(mem->memory, mem->size + realsize + 1);
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if (ptr == NULL) {
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/* 内存不足！ */
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printf("not enough memory (realloc returned NULL)\n");
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return 0;
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}
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mem->memory = ptr;
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memcpy(&(mem->memory[mem->size]), contents, realsize);
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mem->size += realsize;
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mem->memory[mem->size] = 0;
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return realsize;
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}
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// 获取公网IP
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static char *GET_PUBLIC_IP(char *URL)
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{
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CURL *curl_handle;
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CURLcode res;
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struct MemoryStruct chunk;
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chunk.memory = malloc(1); /* 将根据上述再分配的需要增长 */
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chunk.size = 0; /* 此时没有数据 */
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curl_global_init(CURL_GLOBAL_ALL);
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/* 初始化curl会话 */
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curl_handle = curl_easy_init();
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/* 指定要获取的URL */
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curl_easy_setopt(curl_handle, CURLOPT_URL, URL);
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/* 将所有数据发送到此函数 */
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//对于同一次阻塞的curl_easy_perform而言，在写完获取的数据之前，会多次调用 WriteMemoryCallback
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curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
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/* 将“chunk”结构传递给回调函数 */
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curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, (void *)&chunk);
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curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, "libcurl-agent/1.0");
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//对于同一次阻塞的curl_easy_perform而言，在写完获取的数据之前，会多次调用 WriteMemoryCallback
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res = curl_easy_perform(curl_handle);
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if (res != CURLE_OK) {
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fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
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} else {
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//printf("%lu bytes retrieved\n", (unsigned long)chunk.size);
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//printf("%s", chunk.memory);
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;
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}
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curl_easy_cleanup(curl_handle);
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curl_global_cleanup();
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return chunk.memory;
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}
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// 检测系统
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int check_system()
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{
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if (0 == access("/etc/debian_version", F_OK)) {
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return DEBISN_SYSTEM;
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} else if (0 == access("/etc/centos-release", F_OK)) {
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return CENTOS_SYSTEM;
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}
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return UNKNOWN_SYSTEM;
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}
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// 钉钉告警
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int dingding_warning(char *illegal_ip, char *public_ip, conf * conf)
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{
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FILE *fp;
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char temp[64];
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char jsonObj[BUFFER];
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memset(jsonObj, 0, BUFFER);
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memset(temp, 0, 64);
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strcpy(temp, public_ip);
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temp[strlen(public_ip) - 1] = '\0';
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if ((fp = fopen("libcurl_ding.log", "wt+")) == NULL) {
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return 1;
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}
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CURL *curl;
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CURLcode res;
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curl_global_init(CURL_GLOBAL_ALL);
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curl = curl_easy_init();
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if (curl == NULL) {
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return 1;
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}
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#define JSIN "{ \
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\"msgtype\": \"text\", \
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\"text\": { \
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\"content\": \"Alert @%s 服务器地址:%s，封禁非法入侵主机:%s\" \
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}, \
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\"at\": { \
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\"atMobiles\": [\"%s\"], \
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\"isAtAll\": false \
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} \
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}"
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sprintf(jsonObj, JSIN, conf->PHONE, temp, illegal_ip, conf->PHONE);
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printf("%s\n", jsonObj);
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struct curl_slist *headers = NULL;
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headers = curl_slist_append(headers, "Accept: application/json");
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headers = curl_slist_append(headers, "Content-Type: application/json");
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headers = curl_slist_append(headers, "charset: utf-8");
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curl_easy_setopt(curl, CURLOPT_URL, conf->DING_WEBHOOK);
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curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
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curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
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curl_easy_setopt(curl, CURLOPT_POST, 1);
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curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
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curl_easy_setopt(curl, CURLOPT_POSTFIELDS, jsonObj);
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curl_easy_setopt(curl, CURLOPT_USERAGENT, "libcurl/0.1");
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curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);
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res = curl_easy_perform(curl);
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curl_easy_cleanup(curl);
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curl_global_cleanup();
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fclose(fp);
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return res;
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}
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// 邮件告警
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int mail_warning(char *illegal_ip, char *public_ip, conf * conf)
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{
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FILE *fp = NULL;
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char buff[BUFFER];
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char text[BUFFER];
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char temp[64];
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memset(buff, 0, BUFFER);
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memset(text, 0, BUFFER);
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memset(temp, 0, 64);
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strcpy(temp, public_ip);
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temp[strlen(public_ip) - 1] = '\0';
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sprintf(text, "echo \"主机:%s, 禁止%s访问\" | mail -s \"System ban IP\" %s", temp, illegal_ip, conf->RECV_MAIL);
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if (NULL == (fp = popen(text, "r"))) {
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perror("popen text");
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}
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while (fgets(buff, BUFFER, fp) != NULL) {
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buff[strlen(buff) - 1] = '\0';
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}
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if (NULL != fp)
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pclose(fp);
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return 0;
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}
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// 第三方邮箱告警
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int QQ_mail_warning(char *illegal_ip, char *public_ip, conf * conf)
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{
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char string[BUFFER + (sizeof(QQMAIL))];
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char text[BUFFER];
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char temp[32];
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memset(string, 0, BUFFER + (sizeof(QQMAIL)));
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memset(text, 0, BUFFER);
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memset(temp, 0, 32);
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strcpy(temp, public_ip);
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temp[strlen(public_ip) - 1] = '\0';
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sprintf(text, "主机:%s, 禁止%s访问", temp, illegal_ip);
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sprintf(string, QQMAIL, conf->RECV_MAIL, text);
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return system(string);
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}
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// 封禁非法IP
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int rule(conf * conf)
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{
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FILE *fp, *fc;
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//char p[2], splice_command[LONG_BUFFER], command[LONG_BUFFER], *temp, buffer[BUFFER], awk[BUFFER], iptables[BUFFER + (sizeof(IPTABLES))], iptables_check[BUFFER + (sizeof(IPTABLES_CHECK))];
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char p[2], splice_command[LONG_BUFFER], command[LONG_BUFFER], *temp, buffer[BUFFER], awk[BUFFER];
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time_t timep;
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struct tm *tp;
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time(&timep);
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tp = localtime(&timep);
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memset(splice_command, 0, LONG_BUFFER);
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memset(command, 0, LONG_BUFFER);
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memset(buffer, 0, BUFFER);
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memset(awk, 0, BUFFER);
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//memset(iptables, 0, BUFFER+(sizeof(IPTABLES)));
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//memset(iptables_check, 0, BUFFER+(sizeof(IPTABLES_CHECK)));
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fp = NULL;
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fc = NULL;
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if (DEBISN_SYSTEM == check_system()) // Debian 系统规则
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{
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if (tp->tm_mday >= 10) {
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if ((fp = popen(GE_10, "r")) == NULL) {
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perror("GE_10");
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return 1;
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}
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} else {
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if ((fp = popen(LE_10, "r")) == NULL) {
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perror("LE_10");
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return 1;
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}
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}
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} else if (CENTOS_SYSTEM == check_system()) // Centos 7系统规则
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{
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if (tp->tm_mday >= 10) {
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if ((fp = popen(CENTOS_GE_10, "r")) == NULL) {
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perror("CENTOS_GE_10");
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return 1;
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}
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} else {
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if ((fp = popen(CENTOS_LE_10, "r")) == NULL) {
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perror("CENTOS_LE_10");
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return 1;
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}
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}
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} else {
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return UNKNOWN_SYSTEM;
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}
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while (fgets(buffer, BUFFER, fp) != NULL) {
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temp = strstr(buffer, "rhost");
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sscanf(temp, "rhost=%s", temp);
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if (atoi(strncpy(p, temp, 1)) > 0) {
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strcat(splice_command, temp);
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strcat(splice_command, "\n");
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}
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}
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printf("%s", splice_command); // 打印所有非法IP
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// 拼接命令
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sprintf(awk, AWK, conf->REFUSE_NUMBER);
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strcpy(command, "echo \"");
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strcat(command, splice_command);
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strcat(command, "\"");
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strcat(command, awk);
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if ((fp = popen(command, "r")) == NULL) // 执行命令
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{
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perror("popen command");
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return 1;
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}
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while (fgets(buffer, BUFFER, fp) != NULL) // 执行命令后, 为空时就不会
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{
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buffer[strlen(buffer) - 1] = '\0'; // 去除回车
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//sprintf(iptables, IPTABLES, buffer);
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//sprintf(iptables_check, IPTABLES_CHECK, buffer);
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//if (0 != system(iptables_check)) // 调用iptables命令判断是否存在规则, 不存在时再添加规则
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if (0 != show_all_rule(buffer)) // libiptc库判断
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{
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if (conf->IS_DING_WEBHOOK == 1) // 钉钉告警
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{
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dingding_warning(buffer, public_ip, conf);
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sleep(3);
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}
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if (conf->IS_MAIL == 1) // 邮件告警
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{
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mail_warning(buffer, public_ip, conf);
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sleep(3);
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}
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if (conf->IS_QQMAIL == 1) // 邮件告警
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{
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QQ_mail_warning(buffer, public_ip, conf);
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sleep(3);
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}
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/*
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// 调用命令下发规则
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if ((fc = popen(iptables, "r")) == NULL) {
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perror("popen iptables");
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return 1;
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}
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*/
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// libiptc 库插入规则 iptables -t filter -A INPUT -p tcp -s xxxx -j DROP
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unsigned int srcIp;
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inet_pton(AF_INET, buffer, &srcIp);
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iptc_add_rule("filter", "INPUT", IPPROTO_TCP, NULL, NULL, srcIp, 0, NULL, NULL, "DROP", NULL, 1);
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}
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}
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if (fp != NULL)
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pclose(fp);
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if (fc != NULL)
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pclose(fc);
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return 0;
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}
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static void sig_child(int signo)
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{
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pid_t pid;
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int stat;
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// 处理僵尸进程
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while ((pid = waitpid(-1, &stat, WNOHANG)) > 0) ;
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return;
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}
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static int get_executable_path(char *processdir, char *processname, int len)
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{
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char *filename;
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if (readlink("/proc/self/exe", processdir, len) <= 0)
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return -1;
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filename = strrchr(processdir, '/');
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if (filename == NULL)
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return -1;
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++filename;
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strcpy(processname, filename);
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*filename = '\0';
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return (int)(filename - processdir);
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}
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int main(int argc, char *argv[], char **env)
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{
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char path[BUFFER] = { 0 };
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char executable_filename[BUFFER] = { 0 };
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(void)get_executable_path(path, executable_filename, sizeof(path));
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strcat(executable_filename, ".conf");
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strcat(path, executable_filename);
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conf *conf = (struct CONF *)malloc(sizeof(struct CONF));
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read_conf(path, conf);
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//ptintf_conf(conf);
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// 新版本获取公网IP
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public_ip = GET_PUBLIC_IP(conf->PUBLIC_IP);
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//printf("%s", public_ip);
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signal(SIGCHLD, sig_child); // 创建捕捉子进程退出信号
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if (0 == strcmp(conf->DAEMON, "on")) {
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goto goto_daemon;
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}
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if (argv[1] != NULL && 0 == strcmp(argv[1], "-d")) {
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goto_daemon:
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if (daemon(1, 1)) // 守护进程
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{
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perror("daemon");
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return -1;
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}
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while (1) {
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rule(conf);
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sleep(conf->TIME);
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}
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} else {
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rule(conf);
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}
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free_conf(conf);
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free(conf);
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free(public_ip);
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return 0;
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}
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