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使用libiptc下发规则

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This commit is contained in:
aixiao 2022-07-07 16:52:24 +08:00
parent 13d417727c
commit bb544a72de
13 changed files with 661 additions and 90 deletions
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4
Makefile
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@ -1,10 +1,10 @@
CROSS_COMPILE ?=
CC := $(CROSS_COMPILE)gcc
CFLAGS += -g -Wall
LIB += -lcurl
LIB += -lcurl -lip4tc
OBG = rhost
all: rhost.o
all: conf.o rhost.o libiptc.o
$(CC) $(CFLAGS) $^ -o $(OBG) $(LIB)
clean:

232
conf.c Normal file
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@ -0,0 +1,232 @@
#include "conf.h"
int8_t copy_new_mem(char *src, int src_len, char **dest)
{
*dest = (char *)malloc(src_len + 1);
if (*dest == NULL)
return 1;
memcpy(*dest, src, src_len);
*((*dest) + src_len) = '\0';
return 0;
}
/* 在content中，设置变量(var)的首地址，值(val)的位置首地址和末地址，返回下一行指针 */
static char *set_var_val_lineEnd(char *content, char **var, char **val_begin, char **val_end)
{
char *p, *pn, *lineEnd;
;
int val_len;
while (1) {
if (content == NULL)
return NULL;
for (; *content == ' ' || *content == '\t' || *content == '\r' || *content == '\n'; content++) ;
if (*content == '\0')
return NULL;
*var = content;
pn = strchr(content, '\n');
p = strchr(content, '=');
if (p == NULL) {
if (pn) {
content = pn + 1;
continue;
} else
return NULL;
}
content = p;
//将变量以\0结束
for (p--; *p == ' ' || *p == '\t'; p--) ;
*(p + 1) = '\0';
//值的首地址
for (content++; *content == ' ' || *content == '\t'; content++) ;
if (*content == '\0')
return NULL;
//双引号引起来的值支持换行
if (*content == '"') {
*val_begin = content + 1;
*val_end = strstr(*val_begin, "\";");
if (*val_end != NULL)
break;
} else
*val_begin = content;
*val_end = strchr(content, ';');
if (pn && *val_end > pn) {
content = pn + 1;
continue;
}
break;
}
if (*val_end) {
**val_end = '\0';
val_len = *val_end - *val_begin;
lineEnd = *val_end;
} else {
val_len = strlen(*val_begin);
*val_end = lineEnd = *val_begin + val_len;
}
*val_end = *val_begin + val_len;
//printf("var[%s]\nbegin[%s]\n\n", *var, *val_begin);
return lineEnd;
}
static void parse_global_module(char *content, conf * conf)
{
char *var, *val_begin, *val_end, *lineEnd;
int val_begin_len;
while ((lineEnd = set_var_val_lineEnd(content, &var, &val_begin, &val_end)) != NULL) {
if (strcasecmp(var, "DAEMON") == 0) {
val_begin_len = val_end - val_begin;
if (copy_new_mem(val_begin, val_begin_len, &conf->DAEMON) != 0)
return;
}
if (strcasecmp(var, "TIME") == 0) {
val_begin_len = val_end - val_begin;
conf->TIME = atoi(val_begin);
}
if (strcasecmp(var, "REFUSE_NUMBER") == 0) {
val_begin_len = val_end - val_begin;
conf->REFUSE_NUMBER = atoi(val_begin);
}
if (strcasecmp(var, "IS_MAIL") == 0) {
val_begin_len = val_end - val_begin;
conf->IS_MAIL = atoi(val_begin);
}
if (strcasecmp(var, "IS_DING_WEBHOOK") == 0) {
val_begin_len = val_end - val_begin;
conf->IS_DING_WEBHOOK = atoi(val_begin);
}
if (strcasecmp(var, "PHONE") == 0) {
val_begin_len = val_end - val_begin;
if (copy_new_mem(val_begin, val_begin_len, &conf->PHONE) != 0)
return;
}
if (strcasecmp(var, "DING_WEBHOOK") == 0) {
val_begin_len = val_end - val_begin;
if (copy_new_mem(val_begin, val_begin_len, &conf->DING_WEBHOOK) != 0)
return;
}
if (strcasecmp(var, "IS_QQMAIL") == 0) {
val_begin_len = val_end - val_begin;
conf->IS_QQMAIL = atoi(val_begin);
}
if (strcasecmp(var, "SEND_QQ") == 0) {
val_begin_len = val_end - val_begin;
if (copy_new_mem(val_begin, val_begin_len, &conf->SEND_QQ) != 0)
return;
}
if (strcasecmp(var, "QQMAIL_KEY") == 0) {
val_begin_len = val_end - val_begin;
if (copy_new_mem(val_begin, val_begin_len, &conf->QQMAIL_KEY) != 0)
return;
}
if (strcasecmp(var, "RECV_MAIL") == 0) {
val_begin_len = val_end - val_begin;
if (copy_new_mem(val_begin, val_begin_len, &conf->RECV_MAIL) != 0)
return;
}
content = strchr(lineEnd + 1, '\n');
}
}
/* 在buff中读取模块(global http https httpdns httpudp)内容 */
static char *read_module(char *buff, const char *module_name)
{
int len;
char *p, *p0;
len = strlen(module_name);
p = buff;
while (1) {
while (*p == ' ' || *p == '\t' || *p == '\r' || *p == '\n')
p++;
if (strncasecmp(p, module_name, len) == 0) {
p += len;
while (*p == ' ' || *p == '\t' || *p == '\r' || *p == '\n')
p++;
if (*p == '{')
break;
}
if ((p = strchr(p, '\n')) == NULL)
return NULL;
}
if ((p0 = strchr(++p, '}')) == NULL)
return NULL;
return strndup(p, p0 - p);
}
void read_conf(char *filename, conf * configure)
{
char *buff, *global_content;
FILE *file;
long file_size;
int return_val;
file = fopen(filename, "r");
if (file == NULL)
perror("cannot open config file.");
fseek(file, 0, SEEK_END);
file_size = ftell(file);
buff = (char *)alloca(file_size + 1);
if (buff == NULL)
perror("out of memory.");
rewind(file);
if (1 > (return_val = fread(buff, file_size, 1, file)))
perror("fread");
fclose(file);
buff[file_size] = '\0';
if ((global_content = read_module(buff, "global")) == NULL) {
perror("read global module error");
}
parse_global_module(global_content, configure);
free(global_content);
}
void free_conf(conf * conf)
{
free(conf->DAEMON);
free(conf->PHONE);
free(conf->DING_WEBHOOK);
free(conf->SEND_QQ);
free(conf->QQMAIL_KEY);
free(conf->RECV_MAIL);
return;
}
void ptintf_conf(conf *conf)
{
printf("%s\n", conf->DAEMON);
printf("%d\n", conf->TIME);
printf("%d\n", conf->REFUSE_NUMBER);
printf("%d\n", conf->IS_MAIL);
printf("%d\n", conf->IS_DING_WEBHOOK);
printf("%s\n", conf->PHONE);
printf("%s\n", conf->DING_WEBHOOK);
printf("%d\n", conf->IS_QQMAIL);
printf("%s\n", conf->SEND_QQ);
printf("%s\n", conf->QQMAIL_KEY);
printf("%s\n", conf->RECV_MAIL);
}

32
conf.h Normal file
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@ -0,0 +1,32 @@
#ifndef CONF_H
#define CONF_H
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
typedef struct CONF {
char *DAEMON;
int TIME;
int REFUSE_NUMBER;
int IS_MAIL;
int IS_DING_WEBHOOK;
char *PHONE;
char *DING_WEBHOOK;
int IS_QQMAIL;
char *SEND_QQ;
char *QQMAIL_KEY;
char *RECV_MAIL;
} conf;
void read_conf(char *filename, conf *configure);
void free_conf(conf * conf);
void ptintf_conf(conf *conf);
#endif

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49
denyhosts.sh
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@ -6,41 +6,46 @@
# Time: 20170909
#
source /etc/profile
function init() {
send_mail=0;
pwd_path="/root";
SEND_MAIL=0
PWD_PATH="/root";
TIME=`date +"%Y%m%d%H%M"`;
log_file="${pwd_path}/${TIME}.log";
email_address="1605227279@qq.com";
LOG_FILE="${PWD_PATH}/${TIME}.log";
EMAIL_ADDRESS="1605227279@qq.com";
IPTABLES=$(which iptables)
IPTABLES_SAVE=$(which iptables-save)
}
function run()
{
echo "Read-Only Memory,ROM:" &>> ${log_file}
df -am &>> ${log_file}
echo "Read-Only Memory,ROM:" &>> ${LOG_FILE}
df -am &>> ${LOG_FILE}
echo "random access memory，RAM:" &>> ${log_file}
free -hl &>> ${log_file}
echo "random access memory，RAM:" &>> ${LOG_FILE}
free -hl &>> ${LOG_FILE}
echo "System process:" &>> ${log_file}
ps -axjf &>> ${log_file}
echo "System process:" &>> ${LOG_FILE}
ps -axwwjf &>> ${LOG_FILE}
echo "Network Connections" &>> ${log_file}
netstat -tnulp &>> ${log_file}
echo "Network Connections" &>> ${LOG_FILE}
netstat -tnulp &>> ${LOG_FILE}
echo "System SSH authorization information:" &>> ${log_file}
/root/denyhosts/rhost | awk '{a[$1]+=1;} END {for(i in a){print a[i]" "i;}}' &>> ${log_file}
echo "System SSH authorization information:" &>> ${LOG_FILE}
/root/denyhosts/rhost | awk '{a[$1]+=1;} END {for(i in a){print a[i]" "i;}}' &>> ${LOG_FILE}
/sbin/iptables-save > /root/ipv4tables
$IPTABLES_SAVE > /root/ipv4tables
echo "" &>> ${log_file}
echo "Iptables filter table" &>> ${log_file}
/sbin/iptables -L -n --line-numbers &>> ${log_file}
echo "" &>> ${log_file}
echo "" &>> ${LOG_FILE}
echo "Iptables filter table" &>> ${LOG_FILE}
$IPTABLES -L -n --line-numbers &>> ${LOG_FILE}
echo "" &>> ${LOG_FILE}
if test $send_mail = 1; then
mail -s "System Log" ${email_address} < ${log_file}
rm ${log_file}
if test $SEND_MAIL = 1; then
mail -s "System Log" ${EMAIL_ADDRESS} < ${LOG_FILE}
rm ${LOG_FILE}
fi
sync

209
libiptc.c Normal file
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@ -0,0 +1,209 @@
#include "libiptc.h"
int x_get_rule(const char *chain, struct xtc_handle *handle, char *ipv4)
{
int r=1;
const struct ipt_entry *entry;
for (entry = iptc_first_rule(chain, handle); entry; entry = iptc_next_rule(entry, handle)) {
iptc_get_target(entry, handle);
char addr[33];
memset(addr, 0, 33);
inet_ntop(AF_INET, &(entry->ip.dst), addr, sizeof(addr));
printf("%s\n", addr);
if (0 == strcmp(ipv4, addr))
{
r=0;
break;
}
}
return r;
}
int show_all_rule(char *ipv4)
{
int r;
struct xtc_handle *handle;
const char *chain = NULL;
struct ipt_counters counter;
handle = iptc_init("filter");
for (chain = iptc_first_chain(handle); chain; chain = iptc_next_chain(handle))
{
if (chain != NULL && handle != NULL) {
iptc_get_policy(chain, &counter, handle);
}
r = x_get_rule(chain, handle, ipv4);
if (r==0){
break;
}
}
return r;
}
static u_int16_t parse_port(const char *port)
{
return atoi(port);
}
static void parse_ports(const char *portstring, u_int16_t * ports)
{
char *buffer;
char *cp;
buffer = strdup(portstring);
if ((cp = strchr(buffer, ':')) == NULL)
ports[0] = ports[1] = parse_port(buffer);
else {
*cp = '\0';
cp++;
ports[0] = buffer[0] ? parse_port(buffer) : 0;
ports[1] = cp[0] ? parse_port(cp) : 0xFFFF;
}
free(buffer);
}
struct ipt_entry_match *get_match(const char *sports, const char *dports, unsigned int *nfcache, char *protocol)
{
struct ipt_entry_match *match;
struct ipt_udp *udpinfo;
size_t size;
size = IPT_ALIGN(sizeof(*match)) + IPT_ALIGN(sizeof(*udpinfo));
match = (struct ipt_entry_match *)calloc(1, size);
match->u.match_size = size;
strncpy(match->u.user.name, protocol, IPT_FUNCTION_MAXNAMELEN);
udpinfo = (struct ipt_udp *)match->data;
udpinfo->spts[1] = udpinfo->dpts[1] = 0xFFFF;
//printf("sports=%s,dports=%s\n", sports, dports);
if (sports) {
*nfcache |= NFC_IP_SRC_PT;
parse_ports(sports, udpinfo->spts);
}
if (dports) {
*nfcache |= NFC_IP_DST_PT;
parse_ports(dports, udpinfo->dpts);
}
return match;
}
int iptc_add_rule(const char *table, const char *chain, int protocol, const char *iniface, const char *outiface, unsigned int src,
unsigned int dest, const char *srcports, const char *destports, const char *target, const char *dnat_to, const int append)
{
struct xtc_handle *handle;
struct ipt_entry *chain_entry;
struct ipt_entry_match *entry_match = NULL;
struct ipt_entry_target *entry_target;
ipt_chainlabel labelit;
long match_size;
int result = 0;
chain_entry = (struct ipt_entry *)calloc(1, sizeof(*chain_entry));
if (src != 0) {
chain_entry->ip.src.s_addr = src;
chain_entry->ip.smsk.s_addr = 0xFFFFFFFF;
}
if (dest != 0) {
chain_entry->ip.dst.s_addr = dest;
chain_entry->ip.dmsk.s_addr = 0xFFFFFFFF;
}
if (iniface)
strncpy(chain_entry->ip.iniface, iniface, IFNAMSIZ);
if (outiface)
strncpy(chain_entry->ip.outiface, outiface, IFNAMSIZ);
chain_entry->ip.proto = protocol;
if (IPPROTO_UDP == protocol)
entry_match = get_match(srcports, destports, &chain_entry->nfcache, "udp");
if (IPPROTO_TCP == protocol)
entry_match = get_match(srcports, destports, &chain_entry->nfcache, "tcp");
if (strcmp(target, "") == 0 || strcmp(target, IPTC_LABEL_ACCEPT) == 0 || strcmp(target, IPTC_LABEL_DROP) == 0 || strcmp(target, IPTC_LABEL_QUEUE) == 0 || strcmp(target, IPTC_LABEL_RETURN) == 0) {
size_t size;
size = IPT_ALIGN(sizeof(struct ipt_entry_target)) + IPT_ALIGN(sizeof(int));
entry_target = (struct ipt_entry_target *)calloc(1, size);
entry_target->u.user.target_size = size;
strncpy(entry_target->u.user.name, target, IPT_FUNCTION_MAXNAMELEN);
}
if (entry_match) {
match_size = entry_match->u.match_size;
} else
match_size = 0;
struct ipt_entry *tmp_ipt = chain_entry;
chain_entry = (struct ipt_entry *)realloc(chain_entry, sizeof(*chain_entry) + match_size + entry_target->u.target_size);
if (chain_entry == NULL) {
free(tmp_ipt);
}
memcpy(chain_entry->elems + match_size, entry_target, entry_target->u.target_size);
chain_entry->target_offset = sizeof(*chain_entry) + match_size;
chain_entry->next_offset = sizeof(*chain_entry) + match_size + entry_target->u.target_size;
if (entry_match) {
memcpy(chain_entry->elems, entry_match, match_size);
}
handle = iptc_init(table);
if (!handle) {
printf("libiptc error: Can't initialize table %s, %s\n", table, iptc_strerror(errno));
free(chain_entry);
free(entry_target);
if (entry_match)
free(entry_match);
return 1;
}
strncpy(labelit, chain, sizeof(ipt_chainlabel));
//printf("Chain name:%s\n", chain);
result = iptc_is_chain(chain, handle);
if (!result) {
printf("libiptc error: Chain %s does not exist!\n", chain);
free(chain_entry);
free(entry_target);
if (entry_match)
free(entry_match);
return 1;
}
if (append)
result = iptc_append_entry(labelit, chain_entry, handle);
else
result = iptc_insert_entry(labelit, chain_entry, 0, handle);
if (!result) {
printf("libiptc error: Can't add, %s\n", iptc_strerror(errno));
free(chain_entry);
free(entry_target);
if (entry_match)
free(entry_match);
return 1;
}
result = iptc_commit(handle);
if (!result) {
printf("libiptc error: Commit error, %s\n", iptc_strerror(errno));
free(chain_entry);
free(entry_target);
if (entry_match)
free(entry_match);
return 1;
}
if (entry_match)
free(entry_match);
free(entry_target);
free(chain_entry);
return 0;
}

38
libiptc.h Normal file
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@ -0,0 +1,38 @@
#ifndef LIBIPTC_H
#define LIBIPTC_H
#include <string.h>
#include <ctype.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/time.h>
#include <stdio.h>
#include <errno.h>
#include <linux/netfilter/x_tables.h>
#include <libiptc/libiptc.h>
/* Source port. */
#define NFC_IP_SRC_PT 0x0200
/* Dest port. */
#define NFC_IP_DST_PT 0x0400
#ifndef IPT_MIN_ALIGN
#define IPT_MIN_ALIGN (__alignof__(struct ipt_entry))
#endif
#define IPT_ALIGN(s) (((s) + ((IPT_MIN_ALIGN)-1)) & ~((IPT_MIN_ALIGN)-1))
#define IPTC_ENTRY_SIZE XT_ALIGN(sizeof(struct ipt_entry))
#define IPTC_MATCH_SIZE XT_ALIGN(sizeof(struct ipt_entry_match) + sizeof(struct ipt_udp))
#define IPTC_TARGET_SIZE XT_ALIGN(sizeof(struct ipt_entry_target))
#define IPTC_FULL_SIZE IPTC_ENTRY_SIZE + IPTC_MATCH_SIZE + IPTC_TARGET_SIZE
int show_all_rule(char *ipv4);
int iptc_add_rule(const char *table, const char *chain, int protocol, const char *iniface, const char *outiface, unsigned int src,
unsigned int dest, const char *srcports, const char *destports, const char *target, const char *dnat_to, const int append);
#endif

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rhost
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112
rhost.c
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@ -1,40 +1,8 @@
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <time.h>
#include <signal.h>
#include <sys/wait.h>
#include <curl/curl.h>
#define CENTOS_SYSTEM 1
#define DEBISN_SYSTEM 2
#define UNKNOWN_SYSTEM 3
#include "conf.h"
#include "rhost.h"
#include "libiptc.h"
#define BUFFER 1024
#define LONG_BUFFER 1024*100
#define TOP_IP 10
#define AWK " | awk -v num=%d '{a[$1]+=1;} END {for(i in a){if (a[i] >= num) {print i;}}}' "
#define GE_10 "grep -E \"^$(LC_ALL=\"C\" date \"+%h\").$(LC_ALL=\"C\" date \"+%d\")\" /var/log/auth.log | grep failure | grep rhost"
#define LE_10 "grep -E \"^$(LC_ALL=\"C\" date \"+%h\")..$(LC_ALL=\"C\" date | awk '{print $3}')\" /var/log/auth.log | grep failure | grep rhost"
#define CENTOS_GE_10 "grep -E \"^$(LC_ALL=\"C\" date \"+%h\").$(LC_ALL=\"C\" date \"+%d\")\" /var/log/secure | grep failure | grep rhost"
#define CENTOS_LE_10 "grep -E \"^$(LC_ALL=\"C\" date \"+%h\")..$(LC_ALL=\"C\" date | awk '{print $3}')\" /var/log/secure | grep failure | grep rhost"
#define IPTABLES "iptables -I INPUT -s %s -j DROP"
#define IPTABLES_CHECK "iptables -C INPUT -s %s -j DROP"
#define TIME 60
#define IS_DIND 1
#define PHONE "155659790"
#define DING_CURL "https://oapi.dingtalk.com/robot/send?access_token=7f069c672cb878987aa6772cca336740eece4ce36bde12b51b45e9f440e"
#define IS_MAIL 0
#define IS_QQMAIL 0
#define QQMAIL "qqMail -l smtp.qq.com -p 25 -f 1605227279 -e caczsjchvyibi -q NIUYULING -r 1605227279@QQ.COM -n NIUYULING -s \"System ban IP\" -t \"%s\""
// 存储公网IP
char public_ip[BUFFER];
@ -112,8 +80,14 @@ int strReplaceAll(char *str, char *sub, char *replace)
}
// 钉钉告警
int dingding_warning(char *illegal_ip, char *public_ip)
int dingding_warning(char *illegal_ip, char *public_ip, conf *conf)
{
FILE *fp;
if ((fp = fopen("libcurl_ding.log", "wt+")) == NULL){
return 1;
}
CURL *curl;
CURLcode res;
@ -135,27 +109,29 @@ int dingding_warning(char *illegal_ip, char *public_ip)
}";
strReplaceAll(jsonObj, "IP", illegal_ip);
strReplaceAll(jsonObj, "PHONE", PHONE);
strReplaceAll(jsonObj, "PHONE", conf->PHONE);
strReplaceAll(jsonObj, "PUBLIC", public_ip);
printf("%s\n", jsonObj);
//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, DING_CURL);
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;
}
@ -188,17 +164,18 @@ int mail_warning(char *illegal_ip, char *public_ip)
}
// 第三方邮箱告警
int QQ_mail_warning(char *illegal_ip, char *public_ip)
int QQ_mail_warning(char *illegal_ip, char *public_ip, conf *conf)
{
char string[BUFFER+(sizeof(QQMAIL))];
char text[BUFFER] = "主机:HOST, 禁止IP访问!";
char text[BUFFER] = "主机:HOST, 禁止IP访问";
strReplaceAll(text, "IP", illegal_ip);
strReplaceAll(text, "HOST", public_ip);
memset(string, 0, BUFFER+(sizeof(QQMAIL)));
sprintf(string, QQMAIL, text);
sprintf(string, QQMAIL, conf->SEND_QQ, conf->QQMAIL_KEY, conf->RECV_MAIL, text);
system(string);
@ -206,10 +183,10 @@ int QQ_mail_warning(char *illegal_ip, char *public_ip)
}
// 封禁非法IP
int rule()
int rule(conf *conf)
{
FILE *fp, *fc;
char p[2], splice_command[LONG_BUFFER], command[LONG_BUFFER], *temp, buffer[BUFFER], awk[BUFFER], iptables[BUFFER + (sizeof(IPTABLES))], iptables_check[BUFFER + (sizeof(IPTABLES))];
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))];
time_t timep;
struct tm *tp;
@ -220,7 +197,7 @@ int rule()
memset(buffer, 0, BUFFER);
memset(awk, 0, BUFFER);
memset(iptables, 0, BUFFER+(sizeof(IPTABLES)));
memset(iptables_check, 0, BUFFER+(sizeof(IPTABLES)));
memset(iptables_check, 0, BUFFER+(sizeof(IPTABLES_CHECK)));
fp = NULL;
fc = NULL;
@ -266,7 +243,7 @@ int rule()
printf("%s", splice_command); // 打印所有非法IP
// 拼接命令
sprintf(awk, AWK, TOP_IP);
sprintf(awk, AWK, conf->REFUSE_NUMBER);
strcpy(command, "echo \"");
strcat(command, splice_command);
strcat(command, "\"");
@ -286,31 +263,40 @@ int rule()
sprintf(iptables, IPTABLES, buffer);
sprintf(iptables_check, IPTABLES_CHECK, buffer);
if (0 != system(iptables_check)) // 判断是否存在规则, 不存在时再添加规则
//if (0 != system(iptables_check)) // 判断是否存在规则, 不存在时再添加规则
if (0 != show_all_rule(buffer))
{
if (IS_DIND == 1) // 钉钉告警
if (conf->IS_DING_WEBHOOK == 1) // 钉钉告警
{
dingding_warning(buffer, public_ip);
dingding_warning(buffer, public_ip, conf);
sleep(3);
}
if (IS_MAIL == 1) // 邮件告警
if (conf->IS_MAIL == 1) // 邮件告警
{
mail_warning(buffer, public_ip);
sleep(3);
}
if (IS_QQMAIL == 1) // 邮件告警
if (conf->IS_QQMAIL == 1) // 邮件告警
{
QQ_mail_warning(buffer, public_ip);
QQ_mail_warning(buffer, public_ip, conf);
sleep(3);
}
/*
if ((fc = popen(iptables, "r")) == NULL) {
perror("popen iptables");
return 1;
}
*/
// libiptc 库插入规则
unsigned int destIp;
inet_pton(AF_INET, buffer, &destIp);
iptc_add_rule("filter", "INPUT", IPPROTO_TCP, NULL, NULL, 0, destIp, NULL, NULL, "DROP", NULL, 1);
}
}
@ -336,16 +322,23 @@ static void sig_child(int signo)
int main(int argc, char *argv[], char **env)
{
conf *conf = (struct CONF *)malloc(sizeof(struct CONF));
read_conf("rhost.conf", conf);
//ptintf_conf(conf);
memset(public_ip, 0, BUFFER);
get_public_ip(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");
@ -353,17 +346,20 @@ int main(int argc, char *argv[], char **env)
}
while (1) {
rule();
rule(conf);
sleep(TIME);
sleep(conf->TIME);
}
}
else
{
rule();
rule(conf);
}
free_conf(conf);
free(conf);
return 0;
}

17
rhost.conf Normal file
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@ -0,0 +1,17 @@
global {
DAEMON = "off"; // on开启后台运行，off不开启
TIME = "60"; // 睡眠时间
REFUSE_NUMBER = 5; // 拒绝攻击次数
IS_MAIL = 0; // 开启邮件告警
IS_DING_WEBHOOK = 1; // 开启叮叮告警
PHONE = "15565979082"; // @的人手机号
DING_WEBHOOK = "https://oapi.dingtalk.com/robot/send?access_token=7f069c672cb878987aa6772cca336740eece4ce36bde12b51b45e9f440e0565a"; // 钉钉WEBHOOK
IS_QQMAIL = 0; // 开启QQ邮箱告警
SEND_QQ = "1605227279"; // 发送者QQ
QQMAIL_KEY = "caczsjchvyibiabe"; // 发送者QQ密钥
RECV_MAIL = "1605227279"; // 接收者QQ
}

42
rhost.h Normal file
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@ -0,0 +1,42 @@
#ifndef RHOST_H
#define RHOST_H
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <time.h>
#include <signal.h>
#include <sys/wait.h>
#include <curl/curl.h>
#include <sys/types.h>
#include <arpa/inet.h>
#define CENTOS_SYSTEM 1
#define DEBISN_SYSTEM 2
#define UNKNOWN_SYSTEM 3
#define BUFFER 1024
#define LONG_BUFFER 1024*100
#define AWK " | awk -v num=%d '{a[$1]+=1;} END {for(i in a){if (a[i] >= num) {print i;}}}' "
#define GE_10 "grep -E \"^$(LC_ALL=\"C\" date \"+%h\").$(LC_ALL=\"C\" date \"+%d\")\" /var/log/auth.log | grep failure | grep rhost"
#define LE_10 "grep -E \"^$(LC_ALL=\"C\" date \"+%h\")..$(LC_ALL=\"C\" date | awk '{print $3}')\" /var/log/auth.log | grep failure | grep rhost"
#define CENTOS_GE_10 "grep -E \"^$(LC_ALL=\"C\" date \"+%h\").$(LC_ALL=\"C\" date \"+%d\")\" /var/log/secure | grep failure | grep rhost"
#define CENTOS_LE_10 "grep -E \"^$(LC_ALL=\"C\" date \"+%h\")..$(LC_ALL=\"C\" date | awk '{print $3}')\" /var/log/secure | grep failure | grep rhost"
#define IPTABLES "`which iptables` -t filter -I INPUT -s %s -j DROP"
#define IPTABLES_CHECK "`which iptables` -t filter -C INPUT -s %s -j DROP 2> /dev/null"
#define QQMAIL "qqMail -l smtp.qq.com -p 25 -f %s -e %s -q NIUYULING -r %s@QQ.COM -n NIUYULING -s \"System ban IP\" -t \"%s\""
extern void read_conf(char *filename, conf *configure);
extern void free_conf(conf * conf);
extern void ptintf_conf(conf *conf);
#endif

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rhost.o
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