549 lines
14 KiB
C
549 lines
14 KiB
C
#include "conf.h"
|
||
#include "rhost.h"
|
||
#include "libiptc.h"
|
||
|
||
// 存储公网IP
|
||
char *public_ip;
|
||
|
||
struct MemoryStruct {
|
||
char *memory;
|
||
size_t size;
|
||
};
|
||
|
||
static size_t WriteMemoryCallback(void *contents, size_t size, size_t nmemb, void *userp)
|
||
{
|
||
size_t realsize = size * nmemb;
|
||
struct MemoryStruct *mem = (struct MemoryStruct *)userp;
|
||
|
||
// 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
|
||
char *ptr = realloc(mem->memory, mem->size + realsize + 1);
|
||
if (ptr == NULL) {
|
||
/* 内存不足！ */
|
||
printf("not enough memory (realloc returned NULL)\n");
|
||
return 0;
|
||
}
|
||
|
||
mem->memory = ptr;
|
||
memcpy(&(mem->memory[mem->size]), contents, realsize);
|
||
mem->size += realsize;
|
||
mem->memory[mem->size] = 0;
|
||
|
||
return realsize;
|
||
}
|
||
|
||
// 获取公网IP
|
||
static char *GET_PUBLIC_IP(char *URL)
|
||
{
|
||
CURL *curl_handle;
|
||
CURLcode res;
|
||
|
||
struct MemoryStruct chunk;
|
||
|
||
chunk.memory = malloc(1); /* 将根据上述再分配的需要增长 */
|
||
chunk.size = 0; /* 此时没有数据 */
|
||
|
||
curl_global_init(CURL_GLOBAL_ALL);
|
||
|
||
/* 初始化curl会话 */
|
||
curl_handle = curl_easy_init();
|
||
|
||
/* 指定要获取的URL */
|
||
curl_easy_setopt(curl_handle, CURLOPT_URL, URL);
|
||
/* 将所有数据发送到此函数 */
|
||
//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
|
||
curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
|
||
/* 将“chunk”结构传递给回调函数 */
|
||
curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, (void *)&chunk);
|
||
curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, "libcurl-agent/1.0");
|
||
//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
|
||
res = curl_easy_perform(curl_handle);
|
||
|
||
if (res != CURLE_OK) {
|
||
fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
|
||
} else {
|
||
//printf("%lu bytes retrieved\n", (unsigned long)chunk.size);
|
||
//printf("%s", chunk.memory);
|
||
;
|
||
}
|
||
|
||
curl_easy_cleanup(curl_handle);
|
||
curl_global_cleanup();
|
||
|
||
return chunk.memory;
|
||
}
|
||
|
||
// 检测系统
|
||
int check_system()
|
||
{
|
||
if (0 == access("/etc/debian_version", F_OK)) {
|
||
return DEBISN_SYSTEM;
|
||
} else if (0 == access("/etc/centos-release", F_OK)) {
|
||
return CENTOS_SYSTEM;
|
||
}
|
||
|
||
return UNKNOWN_SYSTEM;
|
||
}
|
||
|
||
// 钉钉告警
|
||
int dingding_warning(char *illegal_ip, char *public_ip, conf * conf)
|
||
{
|
||
FILE *fp;
|
||
char temp[64];
|
||
char jsonObj[BUFFER];
|
||
|
||
memset(jsonObj, 0, BUFFER);
|
||
memset(temp, 0, 64);
|
||
strcpy(temp, public_ip);
|
||
temp[strlen(public_ip) - 1] = '\0';
|
||
|
||
if ((fp = fopen("libcurl_ding.log", "wt+")) == NULL) {
|
||
return 1;
|
||
}
|
||
|
||
CURL *curl;
|
||
CURLcode res;
|
||
|
||
curl_global_init(CURL_GLOBAL_ALL);
|
||
curl = curl_easy_init();
|
||
if (curl == NULL) {
|
||
return 1;
|
||
}
|
||
|
||
#define JSIN "{ \
|
||
\"msgtype\": \"text\", \
|
||
\"text\": { \
|
||
\"content\": \"Alert @%s 服务器地址:%s，封禁非法入侵主机:%s\" \
|
||
}, \
|
||
\"at\": { \
|
||
\"atMobiles\": [\"%s\"], \
|
||
\"isAtAll\": false \
|
||
} \
|
||
}"
|
||
|
||
sprintf(jsonObj, JSIN, conf->PHONE, temp, illegal_ip, conf->PHONE);
|
||
printf("%s\n", jsonObj);
|
||
|
||
struct curl_slist *headers = NULL;
|
||
headers = curl_slist_append(headers, "Accept: application/json");
|
||
headers = curl_slist_append(headers, "Content-Type: application/json");
|
||
headers = curl_slist_append(headers, "charset: utf-8");
|
||
|
||
curl_easy_setopt(curl, CURLOPT_URL, conf->DING_WEBHOOK);
|
||
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
|
||
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
|
||
curl_easy_setopt(curl, CURLOPT_POST, 1);
|
||
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
|
||
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, jsonObj);
|
||
curl_easy_setopt(curl, CURLOPT_USERAGENT, "libcurl/0.1");
|
||
curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);
|
||
|
||
res = curl_easy_perform(curl);
|
||
|
||
curl_easy_cleanup(curl);
|
||
curl_global_cleanup();
|
||
fclose(fp);
|
||
|
||
return res;
|
||
}
|
||
|
||
// 邮件告警
|
||
int mail_warning(char *illegal_ip, char *public_ip, conf * conf)
|
||
{
|
||
FILE *fp = NULL;
|
||
char buff[BUFFER];
|
||
char text[BUFFER];
|
||
char temp[64];
|
||
|
||
memset(buff, 0, BUFFER);
|
||
memset(text, 0, BUFFER);
|
||
memset(temp, 0, 64);
|
||
|
||
strcpy(temp, public_ip);
|
||
temp[strlen(public_ip) - 1] = '\0';
|
||
sprintf(text, "echo \"主机:%s, 禁止%s访问\" | mail -s \"System ban IP\" %s", temp, illegal_ip, conf->RECV_MAIL);
|
||
|
||
if (NULL == (fp = popen(text, "r"))) {
|
||
perror("popen text");
|
||
}
|
||
|
||
while (fgets(buff, BUFFER, fp) != NULL) {
|
||
buff[strlen(buff) - 1] = '\0';
|
||
}
|
||
|
||
if (NULL != fp)
|
||
pclose(fp);
|
||
|
||
return 0;
|
||
}
|
||
|
||
// 第三方邮箱告警
|
||
int QQ_mail_warning(char *illegal_ip, char *public_ip, conf * conf)
|
||
{
|
||
char string[BUFFER + (sizeof(QQMAIL))];
|
||
char text[BUFFER];
|
||
char temp[32];
|
||
|
||
memset(string, 0, BUFFER + (sizeof(QQMAIL)));
|
||
memset(text, 0, BUFFER);
|
||
memset(temp, 0, 32);
|
||
|
||
strcpy(temp, public_ip);
|
||
temp[strlen(public_ip) - 1] = '\0';
|
||
|
||
sprintf(text, "主机:%s, 禁止%s访问", temp, illegal_ip);
|
||
sprintf(string, QQMAIL, conf->RECV_MAIL, text);
|
||
|
||
return system(string);
|
||
}
|
||
|
||
// IP段白名单对比
|
||
int whitelist(char *client_ip, char (*whitelist_ip)[WHITELIST_IP_NUM])
|
||
{
|
||
int i;
|
||
|
||
for (i = 1; i < WHITELIST_IP_NUM - 1; i++) {
|
||
if (strcmp(whitelist_ip[i], "\0") == 0) { // 如果字符串为空就跳出循环
|
||
break;
|
||
}
|
||
if ((strncmp(client_ip, whitelist_ip[i], strlen(whitelist_ip[i]))) == 0) { // 对比client_ip长度,
|
||
return 1;
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
// 地域段白名单对比
|
||
int isregion(char *str, char (*region_list)[WHITELIST_IP_NUM])
|
||
{
|
||
int i;
|
||
char *p;
|
||
|
||
for (i = 1; i < WHITELIST_IP_NUM - 1; i++) {
|
||
if (strcmp(region_list[i], "\0") == 0) { // 如果字符串为空就跳出循环
|
||
break;
|
||
}
|
||
|
||
// 在str中查找region_list[i]
|
||
p = strstr(str, region_list[i]);
|
||
if (p != NULL)
|
||
{
|
||
return 1;
|
||
}
|
||
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
// 去除空格
|
||
char *remove_space(const char *str)
|
||
{
|
||
unsigned int uLen = strlen(str);
|
||
|
||
if(0 == uLen)
|
||
{
|
||
return '\0';
|
||
}
|
||
|
||
char *strRet = (char *)malloc(uLen + 1);
|
||
memset(strRet, 0, uLen+1);
|
||
|
||
unsigned int i = 0, j = 0;
|
||
for(i=0; i<uLen+1; i++)
|
||
{
|
||
if(str[i] != ' ')
|
||
{
|
||
strRet[j++] = str[i];
|
||
}
|
||
}
|
||
strRet[j] = '\0';
|
||
|
||
return strRet;
|
||
}
|
||
|
||
// 封禁非法IP
|
||
int rule(conf * conf)
|
||
{
|
||
int i;
|
||
char whitelist_ip[WHITELIST_IP_NUM][WHITELIST_IP_NUM] = { { 0 }, { 0 } };
|
||
char region_list[WHITELIST_IP_NUM][WHITELIST_IP_NUM] = { { 0 }, { 0 } };
|
||
|
||
char p[2], splice_command[LONG_BUFFER], command[LONG_BUFFER], *temp, buffer[BUFFER], awk[BUFFER];
|
||
FILE *fp, *fc;
|
||
time_t timep;
|
||
struct tm *tp;
|
||
|
||
|
||
i=0;
|
||
fp = NULL;
|
||
fc = NULL;
|
||
time(&timep);
|
||
tp = localtime(&timep);
|
||
memset(splice_command, 0, LONG_BUFFER);
|
||
memset(command, 0, LONG_BUFFER);
|
||
memset(buffer, 0, BUFFER);
|
||
memset(awk, 0, BUFFER);
|
||
|
||
|
||
if (DEBISN_SYSTEM == check_system()) // Debian 系统规则
|
||
{
|
||
if (tp->tm_mday >= 10) {
|
||
if ((fp = popen(GE_10, "r")) == NULL) {
|
||
perror("GE_10");
|
||
return 1;
|
||
}
|
||
} else {
|
||
if ((fp = popen(LE_10, "r")) == NULL) {
|
||
perror("LE_10");
|
||
return 1;
|
||
}
|
||
}
|
||
} else if (CENTOS_SYSTEM == check_system()) // Centos 7系统规则
|
||
{
|
||
if (tp->tm_mday >= 10) {
|
||
if ((fp = popen(CENTOS_GE_10, "r")) == NULL) {
|
||
perror("CENTOS_GE_10");
|
||
return 1;
|
||
}
|
||
} else {
|
||
if ((fp = popen(CENTOS_LE_10, "r")) == NULL) {
|
||
perror("CENTOS_LE_10");
|
||
return 1;
|
||
}
|
||
}
|
||
|
||
} else {
|
||
return UNKNOWN_SYSTEM;
|
||
}
|
||
|
||
while (fgets(buffer, BUFFER, fp) != NULL) {
|
||
temp = strstr(buffer, "rhost");
|
||
sscanf(temp, "rhost=%s", temp);
|
||
if (atoi(strncpy(p, temp, 1)) > 0) {
|
||
strcat(splice_command, temp);
|
||
strcat(splice_command, "\n");
|
||
}
|
||
}
|
||
|
||
printf("%s", splice_command); // 打印所有非法IP
|
||
|
||
|
||
sprintf(awk, AWK, conf->REFUSE_NUMBER); // 拼接命令
|
||
strcpy(command, "echo \"");
|
||
strcat(command, splice_command);
|
||
strcat(command, "\"");
|
||
strcat(command, awk);
|
||
|
||
if ((fp = popen(command, "r")) == NULL) // 执行命令
|
||
{
|
||
perror("popen command");
|
||
return 1;
|
||
}
|
||
|
||
while (fgets(buffer, BUFFER, fp) != NULL) // 执行命令后, 为空时就不会
|
||
{
|
||
buffer[strlen(buffer) - 1] = '\0'; // 去除回车
|
||
|
||
|
||
split_string(conf->IPV4_WHITE_LIST, " ", whitelist_ip);
|
||
split_string(conf->REGION_LIST, " ", region_list);
|
||
|
||
|
||
|
||
// 打印配置
|
||
for (i = 1; i <= WHITELIST_IP_NUM - 1; i++) {
|
||
if (*whitelist_ip[i] != '\0') {
|
||
;
|
||
//printf("%s\n", whitelist_ip[i]);
|
||
}
|
||
}
|
||
|
||
for (i = 1; i <= WHITELIST_IP_NUM - 1; i++) {
|
||
if (*region_list[i] != '\0') {
|
||
;
|
||
//printf("%s\n", region_list[i]);
|
||
}
|
||
}
|
||
|
||
|
||
|
||
if (conf->IPV4_RESTRICTION == 1) { // 是否启用白名单
|
||
if (whitelist(buffer, whitelist_ip) == 1) {
|
||
;
|
||
printf("白名单IPV4:%s\n", buffer);
|
||
|
||
continue;
|
||
}
|
||
}
|
||
|
||
|
||
if (0 != show_all_rule(buffer)) // libiptc库判断否存在规则
|
||
{
|
||
char *location = NULL;
|
||
char *location_json = NULL;
|
||
char iplocation[BUFFER];
|
||
|
||
char URL[BUFFER+70];
|
||
memset(URL, 0, BUFFER+70);
|
||
sprintf(URL, "http://opendata.baidu.com/api.php?query=%s&co=&resource_id=6006&oe=utf8", buffer);
|
||
|
||
location_json = GET_PUBLIC_IP(URL);
|
||
if (NULL == location_json)
|
||
{
|
||
printf("获取IP位置错误!\n");
|
||
|
||
goto BLOCKED;
|
||
}
|
||
else
|
||
{
|
||
char temp[BUFFER];
|
||
char *p = strstr(location_json, "\"location\"");
|
||
char *p1 = strstr(p, "\",");
|
||
|
||
memset(temp, 0, BUFFER);
|
||
memcpy(temp, p+12, p1-p-12);
|
||
location = remove_space(temp);
|
||
}
|
||
|
||
memset(iplocation, 0, BUFFER);
|
||
strcpy(iplocation, buffer);
|
||
strcat(iplocation, "(");
|
||
strcat(iplocation, location);
|
||
strcat(iplocation, ")");
|
||
|
||
|
||
|
||
// 地域白名单
|
||
if (conf->REGION == 1)
|
||
{
|
||
if (isregion(iplocation, region_list) == 1)
|
||
{
|
||
;
|
||
printf("地域白名单: %s\n", iplocation);
|
||
|
||
continue;
|
||
}
|
||
|
||
}
|
||
|
||
|
||
|
||
|
||
if (conf->IS_DING_WEBHOOK == 1) // 钉钉告警
|
||
{
|
||
dingding_warning(iplocation, public_ip, conf);
|
||
sleep(3);
|
||
}
|
||
|
||
if (conf->IS_MAIL == 1) // 邮件告警
|
||
{
|
||
mail_warning(iplocation, public_ip, conf);
|
||
sleep(3);
|
||
}
|
||
|
||
if (conf->IS_QQMAIL == 1) // 邮件告警
|
||
{
|
||
QQ_mail_warning(iplocation, public_ip, conf);
|
||
sleep(3);
|
||
}
|
||
|
||
BLOCKED:
|
||
// 是否封禁攻击IP
|
||
if (conf->IS_BLOCKED == 1) {
|
||
// libiptc 库插入规则 iptables -t filter -A INPUT -p tcp -m tcp -s xxxx -j DROP
|
||
unsigned int srcIp;
|
||
inet_pton(AF_INET, buffer, &srcIp);
|
||
iptc_add_rule("filter", "INPUT", IPPROTO_TCP, NULL, NULL, srcIp, 0, NULL, NULL, "DROP", NULL, 1);
|
||
}
|
||
|
||
free(location);
|
||
free(location_json);
|
||
}
|
||
|
||
}
|
||
|
||
if (fp != NULL)
|
||
pclose(fp);
|
||
|
||
if (fc != NULL)
|
||
pclose(fc);
|
||
|
||
return 0;
|
||
}
|
||
|
||
static void sig_child(int signo)
|
||
{
|
||
pid_t pid;
|
||
int stat;
|
||
// 处理僵尸进程
|
||
while ((pid = waitpid(-1, &stat, WNOHANG)) > 0) ;
|
||
|
||
return;
|
||
}
|
||
|
||
static int get_executable_path(char *processdir, char *processname, int len)
|
||
{
|
||
char *filename;
|
||
if (readlink("/proc/self/exe", processdir, len) <= 0)
|
||
return -1;
|
||
filename = strrchr(processdir, '/');
|
||
if (filename == NULL)
|
||
return -1;
|
||
++filename;
|
||
strcpy(processname, filename);
|
||
*filename = '\0';
|
||
return (int)(filename - processdir);
|
||
}
|
||
|
||
int main(int argc, char *argv[], char **env)
|
||
{
|
||
char path[BUFFER] = { 0 };
|
||
char executable_filename[BUFFER] = { 0 };
|
||
(void)get_executable_path(path, executable_filename, sizeof(path));
|
||
|
||
strcat(executable_filename, ".conf");
|
||
strcat(path, executable_filename);
|
||
|
||
|
||
conf *conf = (struct CONF *)malloc(sizeof(struct CONF));
|
||
read_conf(path, conf);
|
||
//ptintf_conf(conf);
|
||
|
||
|
||
// 获取公网IP
|
||
public_ip = GET_PUBLIC_IP(conf->PUBLIC_IP);
|
||
//printf("%s", public_ip);
|
||
|
||
|
||
signal(SIGCHLD, sig_child); // 创建捕捉子进程退出信号
|
||
|
||
|
||
if (0 == strcmp(conf->DAEMON, "on")) {
|
||
goto goto_daemon;
|
||
}
|
||
|
||
if (argv[1] != NULL && 0 == strcmp(argv[1], "-d")) {
|
||
goto_daemon:
|
||
if (daemon(1, 1)) // 守护进程
|
||
{
|
||
perror("daemon");
|
||
return -1;
|
||
}
|
||
|
||
while (1) {
|
||
rule(conf);
|
||
|
||
sleep(conf->TIME);
|
||
}
|
||
} else {
|
||
rule(conf);
|
||
}
|
||
|
||
free_conf(conf);
|
||
free(conf);
|
||
free(public_ip);
|
||
|
||
return 0;
|
||
}
|