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#include "mgw_utils.h"
#include "vpn_monitor.h"
struct hub_info
{
char name[MGW_SYMBOL_MAX];
char passwd[MGW_SYMBOL_MAX];
unsigned int dhcp_begin_ip;
unsigned int dhcp_end_ip;
}hub_info_t;
#define MAX_HUB_NUM 20
struct vpn_monitor_handle
{
void *logger;
char server_ip[MGW_SYMBOL_MAX];
int server_port;
char server_passwd[MGW_SYMBOL_MAX];
struct hub_info hubs[MAX_HUB_NUM];
int hub_num;
int polling_interval;
MESA_htable_handle ip2user_htable; // should be thread-safe
struct field_stat_handle *fs_handle;
};
static long ip2user_cb_to_del_key(void *data, const uchar *key, uint size, void *user_arg)
{
uint32_t ip = *((uint32_t *)key);
char ip_str[MGW_SYMBOL_MAX];
mgw_utils_inet_ntoa(ip, ip_str);
struct vpn_monitor_handle *handle = (struct vpn_monitor_handle *)user_arg;
struct field_stat_handle *fs_handle = handle->fs_handle;
if(data != NULL)
{
FS_operate(fs_handle->handle, fs_handle->line_ip2user, fs_handle->cloumn_cache_hit, FS_OP_ADD, 1);
MGW_LOG_INFO(handle->logger, "MESA_htable: key existed, table is %s, ip is %s", "ip2user_htable", ip_str);
int rtn = MESA_htable_del(handle->ip2user_htable, key, size, NULL);
if(rtn < 0)
{
MGW_LOG_ERROR(handle->logger, "MESA_htable: Failed at del, errno is %d, table is %s, ip is %s", rtn, "ip2user_htable", ip_str);
return MGW_HTABLE_QUERY_CB_FAILURE;
}
MGW_LOG_INFO(handle->logger, "MESA_htable: Succeed at del, table is %s, ip is %s", "ip2user_htable", ip_str);
}
FS_operate(fs_handle->handle, fs_handle->line_ip2user, fs_handle->cloumn_cache_miss, FS_OP_ADD, 1);
return MGW_HTABLE_QUERY_CB_SUCCESS;
}
static struct vpn_monitor_handle * vpn_monitor_init(void *args)
{
struct vpn_monitor_args *_args = (struct vpn_monitor_args *)args;
struct vpn_monitor_handle *handle = ALLOC(struct vpn_monitor_handle, 1);
handle->logger = _args->logger;
handle->ip2user_htable = _args->ip2user_htable;
handle->fs_handle = _args->fs_handle;
const char *profile = _args->profile;
const char *section = "vpn_server";
char hub_list_str[MGW_STRING_MAX];
MESA_load_profile_string_def(profile, section, "server_ip", handle->server_ip, sizeof(handle->server_ip), "localhost");
MESA_load_profile_int_def(profile, section, "server_port", &(handle->server_port), 443);
MESA_load_profile_int_def(profile, section, "polling_interval", &(handle->polling_interval), 30);
MESA_load_profile_string_def(profile, section, "server_passwd", handle->server_passwd, sizeof(handle->server_passwd), "111111");
MESA_load_profile_string_def(profile, section, "hub_list", hub_list_str, sizeof(hub_list_str), "{NewHub0|111111}");
MGW_LOG_INFO(handle->logger, "MESA_prof_load, [%s]:\n server_ip: %s\n server_port: %d\n server_passwd: %s\n hub_list: %s",
"vpn_server", handle->server_ip, handle->server_port, handle->server_passwd, hub_list_str);
char *token;
char *rest = hub_list_str;
handle->hub_num = 0;
while((token = strtok_r(rest, ",", &rest)))
{
//printf("token is %s\n", token);
char hub_name[MGW_SYMBOL_MAX];
char hub_passwd[MGW_SYMBOL_MAX];
char dhcp_begin_ip[MGW_SYMBOL_MAX];
char dhcp_end_ip[MGW_SYMBOL_MAX];
sscanf(token, "{%s %s %s %[^}]", hub_name, hub_passwd, dhcp_begin_ip, dhcp_end_ip);
strncpy(handle->hubs[handle->hub_num].name, hub_name, MGW_SYMBOL_MAX);
strncpy(handle->hubs[handle->hub_num].passwd, hub_passwd, MGW_SYMBOL_MAX);
unsigned int _dhcp_begin_ip = inet_network(dhcp_begin_ip);
if(_dhcp_begin_ip == INADDR_NONE)
{
MGW_LOG_ERROR(handle->logger, "Invalid dhcp_begin_ip: %s", dhcp_begin_ip);
continue;
}
handle->hubs[handle->hub_num].dhcp_begin_ip = _dhcp_begin_ip;
unsigned int _dhcp_end_ip = inet_network(dhcp_end_ip);
//printf("_dhcp_end_ip is %d\n", _dhcp_end_ip);
if(_dhcp_end_ip == INADDR_NONE)
{
MGW_LOG_ERROR(handle->logger, "Invalid dhcp_end_ip: %s", dhcp_end_ip);
continue;
}
handle->hubs[handle->hub_num].dhcp_end_ip = _dhcp_end_ip;
handle->hub_num ++;
}
FREE(&args);
return handle;
}
/*
static void * vpn_monitor_destroy(struct vpn_monitor_handle *handle)
{
FREE(&handle);
}
*/
static void get_ip2user_by_vpncmd(struct vpn_monitor_handle *handle)
{
const char *server_ip = handle->server_ip;
int server_port = handle->server_port;
struct field_stat_handle *fs_handle = handle->fs_handle;
const char *server_passwd = handle->server_passwd;
char get_sessions_cmd[MGW_STRING_MAX];
char get_iptables_cmd[MGW_STRING_MAX];
char buff[MGW_STRING_MAX];
int i;
for(i = 0; i < handle->hub_num; i++)
{
const char *hub_name = handle->hubs[i].name;
const char *hub_passwd = handle->hubs[i].passwd;
unsigned int dhcp_begin_ip = handle->hubs[i].dhcp_begin_ip;
unsigned int dhcp_end_ip = handle->hubs[i].dhcp_end_ip;
snprintf(get_sessions_cmd, MGW_STRING_MAX, "vpncmd %s:%d /SERVER /PASSWORD:%s /HUB:%s /PASSWORD:%s /CSV /CMD SessionList",
server_ip, server_port, server_passwd, hub_name, hub_passwd);
snprintf(get_iptables_cmd, MGW_STRING_MAX, "vpncmd %s:%d /SERVER /PASSWORD:%s /HUB:%s /PASSWORD:%s /CSV /CMD IPTable",
server_ip, server_port, server_passwd, hub_name, hub_passwd);
//get_iptables_cmd
//printf("get_iptables_cmd: %s\n", get_iptables_cmd);
FILE *get_iptables_fp = popen(get_iptables_cmd, "r");
if(get_iptables_fp == NULL)
{
MGW_LOG_ERROR(handle->logger, "Failed at popen, cmd is %s", get_iptables_cmd);
fclose(get_iptables_fp);
return;
}
fgets(buff, MGW_STRING_MAX, get_iptables_fp);
if(buff == NULL)
{
MGW_LOG_ERROR(handle->logger, "Failed at get_iptables_cmd: %s", "result is null");
fclose(get_iptables_fp);
return;
}
if(strstr(buff, "Error occurred") != NULL)
{
fgets(buff, MGW_STRING_MAX, get_iptables_fp);
MGW_LOG_ERROR(handle->logger, "Failed at get_iptables_cmd: %s", buff);
fclose(get_iptables_fp);
return;
}
//ID,Session Name,IP Address,Created at,Updated at,Location
//1549233234,SID-TESTING10-182,192.168.11.167,2018-11-05 15:02:30,2018-11-05 15:29:02,On 'localhost.localdomain'
//user_name不区分大小写，不能包含-，数据库中一律存小写
while(fgets(buff, MGW_STRING_MAX, get_iptables_fp))
{
char id[MGW_SYMBOL_MAX];
char sess_name[MGW_SYMBOL_MAX];
char dhcp_ip[MGW_SYMBOL_MAX];
sscanf(buff, "%[^,],%[^,],%[^,]", id, sess_name, dhcp_ip);
//get ip and user_name
char *user_name = ALLOC(char, MGW_SYMBOL_MAX);
sscanf(sess_name, "SID-%[^-]", user_name);
//change to lower case
for(size_t i = 0; i < strnlen(user_name, MGW_SYMBOL_MAX); i ++)
{
if(user_name[i] >= 'A' && user_name[i] <= 'Z')
{
user_name[i] = user_name[i] - 'A' + 'a';
}
}
char ip[MGW_SYMBOL_MAX];
sscanf(dhcp_ip, "%s", ip);
//find ip in dhcp range
uint32_t _ip = inet_network(ip);
if(_ip == INADDR_NONE)
{
MGW_LOG_ERROR(handle->logger, "Invalid dhcp_ip: %s", ip);
FREE(&user_name);
continue;
}
if(_ip > dhcp_end_ip || _ip < dhcp_begin_ip)
{
MGW_LOG_INFO(handle->logger, "Not in dhcp range, ip is %s", ip);
FREE(&user_name);
continue;
}
//set ip2user
long cb_rtn = -1;
uint32_t key = inet_addr(ip);
MESA_htable_search_cb(handle->ip2user_htable, (const unsigned char *)(&key), sizeof(key), ip2user_cb_to_del_key, (void *)handle, &cb_rtn);
FS_operate(fs_handle->handle, fs_handle->line_ip2user, fs_handle->cloumn_query_num, FS_OP_ADD, 1);
int rtn = MESA_htable_add(handle->ip2user_htable, (const unsigned char *)(&key), sizeof(key), user_name);
if(rtn < 0)
{
MGW_LOG_ERROR(handle->logger, "MESA_htable: Failed at add, table is %s, key is %s, value is %s", "ip2user_htable", ip, user_name);
FREE(&user_name);
continue;
}
FS_operate(fs_handle->handle, fs_handle->line_ip2user, fs_handle->cloumn_element_num, FS_OP_ADD, 1);
MGW_LOG_INFO(handle->logger, "MESA_htable: Succeed at add, table is %s, key is %s, value is %s", "ip2user_htable", ip, user_name);
}
fclose(get_iptables_fp);
}
}
void * thread_vpn_monitor(void* args)
{
struct vpn_monitor_handle *handle = vpn_monitor_init(args);
while(1)
{
//printf("vpn monitor--------------\n");
get_ip2user_by_vpncmd(handle);
sleep(handle->polling_interval);
}
return NULL;
}
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