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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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <arpa/inet.h>
#include "stackx_cfg.h"
#include "json.h"
#include "nstack_log.h"
#include "spl_def.h"
#include "nstack_securec.h"
#include "stackx_ip_addr.h"
sbr_container_ip_group g_container_ip_group;
/*****************************************************************************
* Prototype : sbr_parse_container_ip_json
* Description : parse port json
* Input : char* param
* Output : None
* Return Value : static void
* Calls :
* Called By :
*
*****************************************************************************/
static void sbr_parse_container_ip_json(char *param)
{
int retval;
struct json_object *obj = json_tokener_parse(param);
struct json_object *container_id_obj = NULL;
struct json_object *ports_list_obj = NULL;
struct json_object *ip_cidr_list_obj = NULL;
if (!obj)
{
NSSBR_LOGERR("json_tokener_parse failed");
return;
}
json_object_object_get_ex(obj, "containerID", &container_id_obj);
if (!container_id_obj)
{
NSSBR_LOGERR("can't get containerID");
goto RETURN_ERROR;
}
json_object_object_get_ex(obj, "ports_list", &ports_list_obj);
if (ports_list_obj)
{
int i;
int port_num = json_object_array_length(ports_list_obj);
if (0 == port_num)
{
NSSBR_LOGERR("port num is 0");
goto RETURN_ERROR;
}
for (i = 0; i < port_num; i++)
{
struct json_object *port_obj =
json_object_array_get_idx(ports_list_obj, i);
json_object_object_get_ex(port_obj, "ip_cidr", &ip_cidr_list_obj);
if (ip_cidr_list_obj)
{
int j;
int ip_cidr_num = json_object_array_length(ip_cidr_list_obj);
for (j = 0; j < ip_cidr_num; ++j)
{
struct json_object *ip_cidr_obj =
json_object_array_get_idx(ip_cidr_list_obj, j);
if (ip_cidr_obj)
{
char tmp[32] = { 0 };
const char *ip_cidr =
json_object_get_string(ip_cidr_obj);
if ((NULL == ip_cidr) || (ip_cidr[0] == 0))
{
NSSBR_LOGERR("ip is empty");
goto RETURN_ERROR;
}
const char *sub = strstr(ip_cidr, "/");
if ((NULL == sub)
|| (sizeof(tmp) - 1 <
(unsigned int) (sub - ip_cidr))
|| (strlen(sub) > sizeof(tmp) - 1))
{
NSSBR_LOGERR("ip format is not ok");
goto RETURN_ERROR;
}
retval =
strncpy_s(tmp, sizeof(tmp), ip_cidr,
(size_t) (sub - ip_cidr));
if (EOK != retval)
{
NSSBR_LOGERR("STRNCPY_S failed]ret=%d", retval);
goto RETURN_ERROR;
}
struct in_addr addr;
retval =
memset_s(&addr, sizeof(addr), 0, sizeof(addr));
if (EOK != retval)
{
NSSBR_LOGERR("MEMSET_S failed]ret=%d", retval);
goto RETURN_ERROR;
}
retval = spl_inet_aton(tmp, &addr);
if (0 == retval)
{
NSSBR_LOGERR("spl_inet_aton failed]ret=%d",
retval);
goto RETURN_ERROR;
}
g_container_ip_group.
ip_array[g_container_ip_group.ip_num].ip =
addr.s_addr;
int mask_len = atoi(sub + 1);
if ((mask_len <= 0) || (mask_len > 32))
{
NSSBR_LOGERR("mask len is not ok");
goto RETURN_ERROR;
}
g_container_ip_group.
ip_array[g_container_ip_group.ip_num].mask_len =
(u32) mask_len;
g_container_ip_group.ip_num++;
if (g_container_ip_group.ip_num >=
SBR_MAX_CONTAINER_IP_NUM)
{
NSSBR_LOGWAR("container ip num is full]ip_num=%u",
g_container_ip_group.ip_num);
goto RETURN_OK;
}
}
}
}
}
}
else
{
NSSBR_LOGERR("can't get ports_list");
goto RETURN_ERROR;
}
RETURN_OK:
json_object_put(obj);
NSSBR_LOGINF("container ip num is %u", g_container_ip_group.ip_num);
u32 idx;
for (idx = 0; idx < g_container_ip_group.ip_num; ++idx)
{
NSSBR_LOGDBG("container ip=0x%08x",
g_container_ip_group.ip_array[idx].ip);
}
return;
RETURN_ERROR:
json_object_put(obj);
if (memset_s
(&g_container_ip_group, sizeof(sbr_container_ip_group), 0,
sizeof(sbr_container_ip_group)) != EOK)
{
NSSBR_LOGERR("MEMSET_S failed");
}
}
/*****************************************************************************
* Prototype : sbr_get_cfg_path
* Description : get cfg path
* Input : None
* Output : None
* Return Value : NSTACK_STATIC const char*
* Calls :
* Called By :
*
*****************************************************************************/
NSTACK_STATIC const char *sbr_get_cfg_path()
{
static char cfg_file[SBR_MAX_CFG_PATH_LEN] =
"/canal/output/portinfo.json";
return cfg_file;
}
/*****************************************************************************
* Prototype : sbr_init_cfg
* Description : init cfg from file
* Input : None
* Output : None
* Return Value : int
* Calls :
* Called By :
*
*****************************************************************************/
int sbr_init_cfg()
{
int ret;
off_t file_len = 0;
off_t buff_len = 0;
char *buff = NULL;
const char *cfg_file = sbr_get_cfg_path(); /* no need check ret */
int fp = open(cfg_file, O_RDONLY);
if (fp < 0)
{
NSSBR_LOGWAR("failed to open file]file name=%s", cfg_file);
goto RETURN_ERROR;
}
file_len = lseek(fp, 0, SEEK_END);
if (file_len <= 0)
{
NSSBR_LOGWAR("failed to get file len]file name=%s", cfg_file);
goto RETURN_ERROR;
}
if (file_len > SBR_MAX_CFG_FILE_SIZE)
{
NSSBR_LOGWAR
("file len is too big]file len=%d, max len=%d, file name=%s",
file_len, SBR_MAX_CFG_FILE_SIZE, cfg_file);
goto RETURN_ERROR;
}
ret = lseek(fp, 0, SEEK_SET);
if (ret < 0)
{
NSSBR_LOGWAR("seek to start failed]file name=%s", cfg_file);
goto RETURN_ERROR;
}
buff_len = file_len + 1;
buff = (char *) malloc(buff_len);
if (!buff)
{
NSSBR_LOGWAR("malloc buff failed]buff_len=%d", buff_len);
goto RETURN_ERROR;
}
ret = memset_s(buff, buff_len, 0, buff_len);
if (EOK != ret)
{
NSSBR_LOGWAR("MEMSET_S failed]ret=%d.", ret);
goto RETURN_ERROR;
}
ret = read(fp, buff, buff_len - 1);
if (ret <= 0)
{
NSSBR_LOGWAR("read failed]ret=%d", ret);
goto RETURN_ERROR;
}
sbr_parse_container_ip_json(buff);
close(fp);
free(buff);
return 0;
RETURN_ERROR:
if (fp >= 0)
{
close(fp);
}
if (buff)
{
free(buff);
}
return -1;
}
/*****************************************************************************
* Prototype : sbr_get_src_ip
* Description : get src ip from cfg
* Input : u32 dst_ip
* u32* src_ip
* Output : None
* Return Value : int
* Calls :
* Called By :
*
*****************************************************************************/
int sbr_get_src_ip(u32 dst_ip, u32 * src_ip)
{
if (!src_ip)
{
NSSBR_LOGERR("src_ip is NULL");
return -1;
}
u32 i;
for (i = 0; i < g_container_ip_group.ip_num; ++i)
{
unsigned int mask = ~0;
mask = (mask << (32 - g_container_ip_group.ip_array[i].mask_len));
mask = htonl(mask);
if ((dst_ip & mask) == (g_container_ip_group.ip_array[i].ip & mask))
{
*src_ip = g_container_ip_group.ip_array[i].ip;
NSSBR_LOGDBG("find src ip]container_ip=0x%08x,dest_ip=0x%08x",
*src_ip, dst_ip);
return 0;
}
}
NSSBR_LOGDBG("can't find src ip]dest_ip=0x%08x", dst_ip);
return -1;
}
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