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#include "mgw_utils.h"
#include "dnat.h"
#include "ip_mgr.h"
struct dnat_handle
{
void *logger;
struct ip_mgr_handle *_ip_mgr_handle;
MESA_htable_handle dnat_rx_htable;
MESA_htable_handle dnat_tx_htable;
};
struct dnat_tx_htable_value
{
struct mgw_utils_sess sess;
uint32_t mrl_ip;
};
static struct field_stat_handle *g_fs_handle = NULL;
static void dnat_rx_htable_data_free_cb(void *data)
{
FS_operate(g_fs_handle->handle, g_fs_handle->line_dnat_rx, g_fs_handle->cloumn_element_num, FS_OP_ADD, -1);
FREE(&data);
}
static void dnat_tx_htable_data_free_cb(void *data)
{
FS_operate(g_fs_handle->handle, g_fs_handle->line_dnat_tx, g_fs_handle->cloumn_element_num, FS_OP_ADD, -1);
FREE(&data);
}
struct dnat_handle * dnat_init(const char *profile, struct ip_mgr_handle *_ip_mgr_handle, struct field_stat_handle *fs_handle, void *logger)
{
struct dnat_handle *handle = ALLOC(struct dnat_handle, 1);
handle->logger = logger;
handle->_ip_mgr_handle = _ip_mgr_handle;
handle->dnat_rx_htable = mgw_utils_create_htable(profile, "dnat_rx_htable", (void *)dnat_rx_htable_data_free_cb, NULL, logger);
handle->dnat_tx_htable = mgw_utils_create_htable(profile, "dnat_tx_htable", (void *)dnat_tx_htable_data_free_cb, NULL, logger);
g_fs_handle = fs_handle;
return handle;
}
void dnat_destroy(struct dnat_handle *handle)
{
MESA_htable_destroy(handle->dnat_rx_htable, NULL);
MESA_htable_destroy(handle->dnat_tx_htable, NULL);
FREE(&handle);
}
static long dnat_rx_htable_query_cb(void *data, const uchar *key, uint size, void *user_arg)
{
struct mgw_utils_sess *dup_value = (struct mgw_utils_sess *)user_arg;
if(data != NULL)
{
struct mgw_utils_sess *_data = (struct mgw_utils_sess *)data;
dup_value->proto = _data->proto;
dup_value->sip = _data->sip;
dup_value->sport = _data->sport;
dup_value->dip = _data->dip;
dup_value->dport = _data->dport;
return MGW_HTABLE_KEY_EXISTED;
}
else
{
return MGW_HTABLE_KEY_NOT_EXISTED;
}
}
static long dnat_tx_htable_query_cb(void *data, const uchar *key, uint size, void *user_arg)
{
struct dnat_tx_htable_value *dup_value = (struct dnat_tx_htable_value *)user_arg;
if(data != NULL)
{
struct dnat_tx_htable_value *_data = (struct dnat_tx_htable_value *)data;
dup_value->sess.proto = _data->sess.proto;
dup_value->sess.sip = _data->sess.sip;
dup_value->sess.sport = _data->sess.sport;
dup_value->sess.dip = _data->sess.dip;
dup_value->sess.dport = _data->sess.dport;
dup_value->mrl_ip = _data->mrl_ip;
return MGW_HTABLE_KEY_EXISTED;
}
else
{
return MGW_HTABLE_KEY_NOT_EXISTED;
}
}
int dnat_tx_convert(struct dnat_handle *handle, char *buff, int len, uint32_t *mrl_ip)
{
//printf("dnat_tx_convert!\n");
void *logger = handle->logger;
//get session
struct mgw_utils_sess *dnat_tx_key = ALLOC(struct mgw_utils_sess, 1);
int rtn = mgw_utils_pkt_sess_parse(buff, len, dnat_tx_key);
if(rtn == -1)
{
FREE(&dnat_tx_key);
MGW_LOG_ERROR(logger, "Failed at parse packet, len is %d", len);
return MGW_DROP;
}
char dnat_tx_key_str[MGW_SYMBOL_MAX];
char dnat_tx_value_str[MGW_SYMBOL_MAX];
mgw_utils_sess_to_str(dnat_tx_key, dnat_tx_key_str);
//query dnat_tx_htable
long cb_rtn = -1;
struct dnat_tx_htable_value dnat_tx_dup_value;
MESA_htable_search_cb(handle->dnat_tx_htable, (const unsigned char *)(dnat_tx_key), sizeof(struct mgw_utils_sess), dnat_tx_htable_query_cb,
(void *)(&dnat_tx_dup_value), &cb_rtn);
FS_operate(g_fs_handle->handle, g_fs_handle->line_dnat_tx, g_fs_handle->cloumn_query_num, FS_OP_ADD, 1);
FREE(&dnat_tx_key);
if(cb_rtn == MGW_HTABLE_KEY_EXISTED)
{
//replace
FS_operate(g_fs_handle->handle, g_fs_handle->line_dnat_tx, g_fs_handle->cloumn_cache_hit, FS_OP_ADD, 1);
mgw_utils_pkt_sess_replace(buff, len, &(dnat_tx_dup_value.sess));
*mrl_ip = dnat_tx_dup_value.mrl_ip;
mgw_utils_sess_to_str(&(dnat_tx_dup_value.sess), dnat_tx_value_str);
MGW_LOG_INFO(logger, "Succeed at dnat_tx_convert: %s ---> %s", dnat_tx_key_str, dnat_tx_value_str);
return MGW_FORWORD;
}
FS_operate(g_fs_handle->handle, g_fs_handle->line_dnat_tx, g_fs_handle->cloumn_cache_miss, FS_OP_ADD, 1);
return MGW_BYPASS;
}
int dnat_rx_convert(struct dnat_handle *handle, char *buff, int len)
{
void *logger = handle->logger;
//get session
struct mgw_utils_sess *dnat_rx_key = ALLOC(struct mgw_utils_sess, 1);
int rtn = mgw_utils_pkt_sess_parse(buff, len, dnat_rx_key);
if(rtn == -1)
{
FREE(&dnat_rx_key);
MGW_LOG_ERROR(logger, "Failed at parse packet, len is %d", len);
return MGW_DROP;
}
char dnat_rx_key_str[MGW_SYMBOL_MAX];
char dnat_rx_value_str[MGW_SYMBOL_MAX];
char dnat_tx_key_str[MGW_SYMBOL_MAX];
char dnat_tx_value_str[MGW_SYMBOL_MAX];
mgw_utils_sess_to_str(dnat_rx_key, dnat_rx_key_str);
//query dnat_rx_htable
long cb_rtn = -1;
struct mgw_utils_sess dnat_rx_dup_value;
MESA_htable_search_cb(handle->dnat_rx_htable, (const unsigned char *)(dnat_rx_key), sizeof(struct mgw_utils_sess), dnat_rx_htable_query_cb,
(void *)(&dnat_rx_dup_value), &cb_rtn);
FS_operate(g_fs_handle->handle, g_fs_handle->line_dnat_rx, g_fs_handle->cloumn_query_num, FS_OP_ADD, 1);
if(cb_rtn == MGW_HTABLE_KEY_EXISTED)
{
//replace
FREE(&dnat_rx_key);
FS_operate(g_fs_handle->handle, g_fs_handle->line_dnat_rx, g_fs_handle->cloumn_cache_hit, FS_OP_ADD, 1);
mgw_utils_pkt_sess_replace(buff, len, &dnat_rx_dup_value);
mgw_utils_sess_to_str(&dnat_rx_dup_value, dnat_rx_value_str);
MGW_LOG_INFO(logger, "Succeed at dnat_rx_convert: %s ---> %s", dnat_rx_key_str, dnat_rx_value_str);
return MGW_FORWORD;
}
FS_operate(g_fs_handle->handle, g_fs_handle->line_dnat_rx, g_fs_handle->cloumn_cache_miss, FS_OP_ADD, 1);
uint32_t trans_ip;
uint16_t trans_port;
char orig_ip_str[MGW_SYMBOL_MAX];
mgw_utils_inet_ntoa(dnat_rx_key->dip, orig_ip_str);
//query dnat_policy
rtn = ip_mgr_dnat_policy_query(handle->_ip_mgr_handle, dnat_rx_key->dip, dnat_rx_key->dport, &trans_ip, &trans_port);
if(rtn < 0)
{
MGW_LOG_ERROR(logger, "Failed at dnat_rx_convert: policy not found, original dest is <%s, %d>", orig_ip_str, ntohs(dnat_rx_key->dport));
FREE(&dnat_rx_key);
return MGW_DROP;
}
//query mrl_ip
uint32_t mrl_ip;
rtn = ip_mgr_mrl_ip_query(handle->_ip_mgr_handle, dnat_rx_key->dip, &mrl_ip);
if(rtn < 0)
{
MGW_LOG_ERROR(logger, "Failed at dnat_rx_convert: mrl_ip not found, original dest is <%s, %d>", orig_ip_str, ntohs(dnat_rx_key->dport));
FREE(&dnat_rx_key);
return MGW_DROP;
}
//add to dnat_rx_table
struct mgw_utils_sess *dnat_rx_value = ALLOC(struct mgw_utils_sess, 1);
dnat_rx_value->sip = dnat_rx_key->sip;
dnat_rx_value->sport = dnat_rx_key->sport;
dnat_rx_value->proto = dnat_rx_key->proto;
dnat_rx_value->dip = trans_ip;
dnat_rx_value->dport = trans_port;
mgw_utils_sess_to_str(dnat_rx_value, dnat_rx_value_str);
rtn = MESA_htable_add(handle->dnat_rx_htable, (const unsigned char *)(dnat_rx_key), sizeof(struct mgw_utils_sess), (const void*)dnat_rx_value);
if(rtn < 0)
{
FREE(&dnat_rx_value);
FREE(&dnat_rx_key);
MGW_LOG_ERROR(logger, "MESA_htable: Failed at add, table is %s, key is %s, value is %s, rtn is %d",
"dnat_rx_htable", dnat_rx_key_str, dnat_rx_value_str, rtn);
return MGW_DROP;
}
FS_operate(g_fs_handle->handle, g_fs_handle->line_dnat_rx, g_fs_handle->cloumn_element_num, FS_OP_ADD, 1);
MGW_LOG_INFO(logger, "MESA_htable: Succeed at add, table is %s, key is %s, value is %s",
"dnat_rx_htable", dnat_rx_key_str, dnat_rx_value_str);
//add to dnat_tx_table
struct mgw_utils_sess *dnat_tx_key = ALLOC(struct mgw_utils_sess, 1);
dnat_tx_key->sip = dnat_rx_value->dip;
dnat_tx_key->sport = dnat_rx_value->dport;
dnat_tx_key->proto = dnat_rx_value->proto;
dnat_tx_key->dip = dnat_rx_value->sip;
dnat_tx_key->dport = dnat_rx_value->sport;
struct dnat_tx_htable_value *dnat_tx_value = ALLOC(struct dnat_tx_htable_value, 1);
dnat_tx_value->sess.sip = dnat_rx_key->dip;
dnat_tx_value->sess.sport = dnat_rx_key->dport;
dnat_tx_value->sess.proto = dnat_rx_key->proto;
dnat_tx_value->sess.dip = dnat_rx_key->sip;
dnat_tx_value->sess.dport = dnat_rx_key->sport;
dnat_tx_value->mrl_ip = mrl_ip;
mgw_utils_sess_to_str(dnat_tx_key, dnat_tx_key_str);
mgw_utils_sess_to_str(&(dnat_tx_value->sess), dnat_tx_value_str);
rtn = MESA_htable_add(handle->dnat_tx_htable, (const unsigned char *)(dnat_tx_key), sizeof(struct mgw_utils_sess), (const void*)dnat_tx_value);
if(rtn < 0)
{
MGW_LOG_ERROR(logger, "MESA_htable: Failed at add, table is %s, key is %s, value is %s, rtn is %d",
"dnat_tx_htable", dnat_tx_key_str, dnat_tx_value_str, rtn);
//dnat_tx_table and dnat_rx_table are Transaction
rtn = MESA_htable_del(handle->dnat_rx_htable, (const unsigned char *)dnat_rx_key, sizeof(struct mgw_utils_sess), NULL);
if(rtn < 0)
{
MGW_LOG_ERROR(logger, "MESA_htable: Failed at del, table is %s, key is %s, value is %s, rtn is %s",
"dnat_rx_htable", dnat_rx_key_str, dnat_rx_value_str, rtn);
}
else
{
MGW_LOG_INFO(logger, "MESA_htable: Succeed at del, table is %s, key is %s, value is %s",
"dnat_rx_htable", dnat_rx_key_str, dnat_rx_value_str);
}
FREE(&dnat_rx_key);
FREE(&dnat_tx_key);
FREE(&dnat_tx_value);
return MGW_DROP;
}
FS_operate(g_fs_handle->handle, g_fs_handle->line_dnat_tx, g_fs_handle->cloumn_element_num, FS_OP_ADD, 1);
MGW_LOG_INFO(logger, "MESA_htable: Succeed at add, table is %s, key is %s, value is %s",
"dnat_tx_htable", dnat_tx_key_str, dnat_tx_value_str);
//replace
FREE(&dnat_rx_key);
FREE(&dnat_tx_key);
mgw_utils_pkt_sess_replace(buff, len, dnat_rx_value);
MGW_LOG_INFO(logger, "Succeed at dnat_rx_convert: %s ---> %s", dnat_rx_key_str, dnat_rx_value_str);
return MGW_FORWORD;
}
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