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/*
*
* Copyright (c) 2018 Huawei Technologies Co.,Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdlib.h>
#include "nstack_rd_data.h"
#include "nsfw_mem_api.h"
#include "nstack_log.h"
#include "nstack_securec.h"
#define RD_SHMEM_NAME "rd_table"
#define RD_AGE_MAX_TIME 3
rd_route_table *g_rd_table_handle = NULL;
#define RD_IP_ROUTE_CPY(pnode, name, data) { \
if (EOK != STRCPY_S((pnode)->data.stack_name, RD_PLANE_NAMELEN, (name))) \
{ \
NSSOC_LOGERR("STRCPY_S failed]copy_name=%s", name); \
} \
(pnode)->data.type = RD_DATA_TYPE_IP; \
(pnode)->agetime = 0; \
(pnode)->data.ipdata.addr = (data)->addr; \
(pnode)->data.ipdata.masklen = (data)->masklen; \
(pnode)->data.ipdata.resev[0] = 0; \
(pnode)->data.ipdata.resev[1] = 0; \
}
/*****************************************************************************
* Prototype : nstack_rd_mng_int
* Description : rd mng module init, create a block memory
* Input : int flag
* Output : None
* Return Value : int
* Calls :
* Called By : nStackMain
*****************************************************************************/
int
nstack_rd_mng_int (int flag)
{
int ret;
nsfw_mem_zone zname = {
{NSFW_SHMEM, NSFW_PROC_MAIN, RD_SHMEM_NAME},
sizeof (rd_route_table),
NSFW_SOCKET_ANY,
0
};
NSSOC_LOGINF ("nstack rd mng init begin]flag=%d", flag);
/*nstack main create, app lookup */
if (0 == flag)
{
g_rd_table_handle = (rd_route_table *) nsfw_mem_zone_create (&zname);
if (!g_rd_table_handle)
{
NSSOC_LOGERR ("mem create fail]mem name=%s", RD_SHMEM_NAME);
return -1;
}
ret =
MEMSET_S (&(g_rd_table_handle->node[0]), sizeof (rd_route_node), 0,
sizeof (rd_route_node));
if (EOK != ret)
{
NSSOC_LOGERR ("MEMSET_S failed]ret=%d", ret);
return -1;
}
g_rd_table_handle->size = NSTACK_RD_DATA_MAX;
g_rd_table_handle->icnt = 0;
}
else /* static data will not be erased in fault case */
{
g_rd_table_handle =
(rd_route_table *) nsfw_mem_zone_lookup (&(zname.stname));
if (!g_rd_table_handle)
{
NSSOC_LOGERR ("mem lookup fail]mem name=%s", RD_SHMEM_NAME);
return -1;
}
}
NSSOC_LOGINF ("nstack rd mng init end flag");
return 0;
}
/*****************************************************************************
* Prototype : nstack_rd_ip_node_insert
* Description : insert a rd_ip_data into list
* Input : char *name
* rd_ip_data *data
* Output : None
* Return Value : int
* Calls :
* Called By : nStackMain
*****************************************************************************/
int
nstack_rd_ip_node_insert (char *name, rd_ip_data * data)
{
if (!g_rd_table_handle)
{
NSSOC_LOGERR ("nstack rd mng not inited");
return -1;
}
int iindex = 0;
rd_route_node *pnode = NULL;
int agetime = 0;
int ageindex = -1;
int freeindex = -1;
int repeatflag = 0;
for (iindex = 0; iindex < NSTACK_RD_DATA_MAX; iindex++)
{
pnode = &(g_rd_table_handle->node[iindex]);
/*record the index of first free element */
if (RD_NODE_USELESS == pnode->flag)
{
if (-1 == freeindex)
{
freeindex = iindex;
NSSOC_LOGINF ("nstack rd ip free element index:%d was found",
iindex);
}
continue;
}
/*if is using, and repeat just set flag */
if (RD_NODE_USING == pnode->flag)
{
if (MASK_V (pnode->data.ipdata.addr, pnode->data.ipdata.masklen) ==
MASK_V (data->addr, data->masklen))
{
NSSOC_LOGWAR
("nstack:%s, old_addr:0x%x index:%d new_addr:0x%x, masklen:%u was repeat",
name, pnode->data.ipdata.addr, iindex, data->addr,
data->masklen);
repeatflag = 1;
}
continue;
}
/*if flag is deleting, just update the age time, if agetime is on, just set flag to free */
if (RD_NODE_DELETING == pnode->flag)
{
pnode->agetime++;
if (pnode->agetime >= RD_AGE_MAX_TIME)
{
pnode->flag = RD_NODE_USELESS;
NSSOC_LOGINF
("nstack rd ip element index:%d addr:0x%x, masklen:%u was delete and set to free",
iindex, pnode->data.ipdata.addr, pnode->data.ipdata.masklen);
}
/*record delete time */
if (agetime < pnode->agetime)
{
agetime = pnode->agetime;
ageindex = iindex;
}
continue;
}
}
/*if repeat, just return */
if (1 == repeatflag)
{
return 0;
}
if (-1 == freeindex)
{
if (-1 != ageindex)
{
freeindex = ageindex;
}
else
{
NSSOC_LOGERR
("the rd table is full,nstack:%s, rd addr:0x%x, masklen:%u can't be inserted",
name, data->addr, data->masklen);
return -1;
}
}
pnode = &(g_rd_table_handle->node[freeindex]);
/*if no free found, just reuse the big agetime */
RD_IP_ROUTE_CPY (pnode, name, data);
pnode->flag = RD_NODE_USING; /*last set */
g_rd_table_handle->icnt++;
NSSOC_LOGINF ("nstack:%s, rd addr:0x%x, masklen:%u index was inserted",
name, data->addr, data->masklen);
return 0;
}
/*****************************************************************************
* Prototype : nstack_rd_ip_node_delete
* Description : rd data delete
* Input : rd_ip_data *data
* Output : None
* Return Value : int
* Calls :
* Called By : nStackMain
* just set delete flag, because
*****************************************************************************/
int
nstack_rd_ip_node_delete (rd_ip_data * data)
{
int iindex = 0;
rd_route_node *pnode = NULL;
if (!g_rd_table_handle)
{
NSSOC_LOGERR ("nstack rd mng not inited");
return -1;
}
for (iindex = 0; iindex < NSTACK_RD_DATA_MAX; iindex++)
{
pnode = &(g_rd_table_handle->node[iindex]);
if ((RD_NODE_USING == pnode->flag)
&& (MASK_V (pnode->data.ipdata.addr, pnode->data.ipdata.masklen) ==
MASK_V (data->addr, data->masklen)))
{
pnode->flag = RD_NODE_DELETING; /*just set deleting state */
pnode->agetime = 0;
g_rd_table_handle->icnt--;
NSSOC_LOGINF
("nstack rd delete:%s, addr:0x%x, masklen:%u index:%d was delete",
pnode->data.stack_name, data->addr, data->masklen, iindex);
return 0;
}
}
NSSOC_LOGINF ("nstack rd delete, addr:0x%x, masklen:%u index was not found",
data->addr, data->masklen);
return 0;
}
/*****************************************************************************
* Prototype : nstack_rd_ip_get
* Description : get rd data from rd table
* Input : char *planename
* rd_route_data **data
* int *num
* Output : None
* Return Value : int
* Calls :
* Called By :
* Note : a block memory was alloc and return by data,
* this need free by caller if return 0, otherwise no need
*****************************************************************************/
int
nstack_rd_ip_get (rd_route_data ** data, int *num)
{
rd_route_data *pdata = NULL;
rd_route_node *pnode = NULL;
int size = 0;
int icnt = 0;
int idex = 0;
int ret;
if (!g_rd_table_handle || !data || !num)
{
NSSOC_LOGERR ("nstack rd mng not inited or input err");
return -1;
}
size = sizeof (rd_route_data) * g_rd_table_handle->size;
pdata = (rd_route_data *) malloc (size);
if (!pdata)
{
NSSOC_LOGERR ("rd route data malloc fail");
return -1;
}
ret = MEMSET_S (pdata, size, 0, size);
if (EOK != ret)
{
NSSOC_LOGERR ("MEMSET_S failed]ret=%d", ret);
free (pdata);
return -1;
}
for (icnt = 0; icnt < g_rd_table_handle->size; icnt++)
{
pnode = &(g_rd_table_handle->node[icnt]);
if (RD_NODE_USING == pnode->flag)
{
pdata[idex].type = pnode->data.type;
pdata[idex].ipdata.addr = pnode->data.ipdata.addr;
pdata[idex].ipdata.masklen = pnode->data.ipdata.masklen;
pdata[idex].ipdata.resev[0] = pnode->data.ipdata.resev[0];
pdata[idex].ipdata.resev[1] = pnode->data.ipdata.resev[1];
ret =
STRCPY_S (pdata[idex].stack_name, RD_PLANE_NAMELEN,
pnode->data.stack_name);
if (EOK != ret)
{
NSSOC_LOGERR ("STRCPY_S failed]ret=%d", ret);
free (pdata);
return -1;
}
idex++;
}
}
/*if no data fetched , just return fail */
if (idex == 0)
{
free (pdata);
return -1;
}
*data = pdata;
*num = idex;
return 0;
}
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