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rt-thread/components/drivers/wlan/wlan_cfg.c

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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-08-06 tyx the first version
*/
#include <rtthread.h>
#include <wlan_cfg.h>
#define DBG_TAG "WLAN.cfg"
#ifdef RT_WLAN_CFG_DEBUG
#define DBG_LVL DBG_LOG
#else
#define DBG_LVL DBG_INFO
#endif /* RT_WLAN_CFG_DEBUG */
#include <rtdbg.h>
#ifdef RT_WLAN_CFG_ENABLE
#define WLAN_CFG_LOCK() (rt_mutex_take(&cfg_mutex, RT_WAITING_FOREVER))
#define WLAN_CFG_UNLOCK() (rt_mutex_release(&cfg_mutex))
#if RT_WLAN_CFG_INFO_MAX < 1
#error "The minimum configuration is 1"
#endif
struct cfg_save_info_head
{
rt_uint32_t magic;
rt_uint32_t len;
rt_uint32_t num;
rt_uint32_t crc;
};
struct rt_wlan_cfg_des
{
rt_uint32_t num;
struct rt_wlan_cfg_info *cfg_info;
};
static struct rt_wlan_cfg_des *cfg_cache;
static const struct rt_wlan_cfg_ops *cfg_ops;
static struct rt_mutex cfg_mutex;
/*
* CRC16_CCITT
*/
static rt_uint16_t rt_wlan_cal_crc(rt_uint8_t *buff, int len)
{
rt_uint16_t wCRCin = 0x0000;
rt_uint16_t wCPoly = 0x1021;
rt_uint8_t wChar = 0;
while (len--)
{
int i;
wChar = *(buff++);
wCRCin ^= (wChar << 8);
for (i = 0; i < 8; i++)
{
if (wCRCin & 0x8000)
wCRCin = (wCRCin << 1) ^ wCPoly;
else
wCRCin = wCRCin << 1;
}
}
return wCRCin;
}
void rt_wlan_cfg_init(void)
{
/* init cache memory */
if (cfg_cache == RT_NULL)
{
cfg_cache = rt_malloc(sizeof(struct rt_wlan_cfg_des));
if (cfg_cache != RT_NULL)
{
rt_memset(cfg_cache, 0, sizeof(struct rt_wlan_cfg_des));
}
/* init mutex lock */
rt_mutex_init(&cfg_mutex, "wlan_cfg", RT_IPC_FLAG_FIFO);
}
}
void rt_wlan_cfg_set_ops(const struct rt_wlan_cfg_ops *ops)
{
rt_wlan_cfg_init();
WLAN_CFG_LOCK();
/* save ops pointer */
cfg_ops = ops;
WLAN_CFG_UNLOCK();
}
/* save config data */
rt_err_t rt_wlan_cfg_cache_save(void)
{
rt_err_t err = RT_EOK;
struct cfg_save_info_head *info_pkg;
int len = 0;
if ((cfg_ops == RT_NULL) || (cfg_ops->write_cfg == RT_NULL))
return RT_EOK;
WLAN_CFG_LOCK();
len = sizeof(struct cfg_save_info_head) + sizeof(struct rt_wlan_cfg_info) * cfg_cache->num;
info_pkg = rt_malloc(len);
if (info_pkg == RT_NULL)
{
WLAN_CFG_UNLOCK();
return -RT_ENOMEM;
}
info_pkg->magic = RT_WLAN_CFG_MAGIC;
info_pkg->len = len;
info_pkg->num = cfg_cache->num;
/* CRC */
info_pkg->crc = rt_wlan_cal_crc((rt_uint8_t *)cfg_cache->cfg_info, sizeof(struct rt_wlan_cfg_info) * cfg_cache->num);
rt_memcpy(((rt_uint8_t *)info_pkg) + sizeof(struct cfg_save_info_head),
cfg_cache->cfg_info, sizeof(struct rt_wlan_cfg_info) * cfg_cache->num);
if (cfg_ops->write_cfg(info_pkg, len) != len)
err = -RT_ERROR;
rt_free(info_pkg);
WLAN_CFG_UNLOCK();
return err;
}
rt_err_t rt_wlan_cfg_cache_refresh(void)
{
int len = 0, i, j;
struct cfg_save_info_head *head;
void *data;
struct rt_wlan_cfg_info *t_info, *cfg_info;
rt_uint32_t crc;
rt_bool_t equal_flag;
/* cache is full! exit */
if (cfg_cache == RT_NULL || cfg_cache->num >= RT_WLAN_CFG_INFO_MAX)
return -RT_ERROR;
/* check callback */
if ((cfg_ops == RT_NULL) ||
(cfg_ops->get_len == RT_NULL) ||
(cfg_ops->read_cfg == RT_NULL))
return -RT_ERROR;
WLAN_CFG_LOCK();
/* get data len */
if ((len = cfg_ops->get_len()) <= 0)
{
WLAN_CFG_UNLOCK();
return -RT_ERROR;
}
head = rt_malloc(len);
if (head == RT_NULL)
{
WLAN_CFG_UNLOCK();
return -RT_ERROR;
}
/* get data */
if (cfg_ops->read_cfg(head, len) != len)
{
rt_free(head);
WLAN_CFG_UNLOCK();
return -RT_ERROR;
}
/* get config */
data = ((rt_uint8_t *)head) + sizeof(struct cfg_save_info_head);
crc = rt_wlan_cal_crc((rt_uint8_t *)data, len - sizeof(struct cfg_save_info_head));
LOG_D("head->magic:0x%08x RT_WLAN_CFG_MAGIC:0x%08x", head->magic, RT_WLAN_CFG_MAGIC);
LOG_D("head->len:%d len:%d", head->len, len);
LOG_D("head->num:%d num:%d", head->num, (len - sizeof(struct cfg_save_info_head)) / sizeof(struct rt_wlan_cfg_info));
LOG_D("hred->crc:0x%04x crc:0x%04x", head->crc, crc);
/* check */
if ((head->magic != RT_WLAN_CFG_MAGIC) ||
(head->len != len) ||
(head->num != (len - sizeof(struct cfg_save_info_head)) / sizeof(struct rt_wlan_cfg_info)) ||
(head->crc != crc))
{
rt_free(head);
WLAN_CFG_UNLOCK();
return -RT_ERROR;
}
/* remove duplicate config */
cfg_info = (struct rt_wlan_cfg_info *)data;
for (i = 0; i < head->num; i++)
{
equal_flag = RT_FALSE;
for (j = 0; j < cfg_cache->num; j++)
{
if ((cfg_cache->cfg_info[j].info.ssid.len == cfg_info[i].info.ssid.len) &&
(rt_memcmp(&cfg_cache->cfg_info[j].info.ssid.val[0], &cfg_info[i].info.ssid.val[0],
cfg_cache->cfg_info[j].info.ssid.len) == 0) &&
(rt_memcmp(&cfg_cache->cfg_info[j].info.bssid[0], &cfg_info[i].info.bssid[0], RT_WLAN_BSSID_MAX_LENGTH) == 0))
{
equal_flag = RT_TRUE;
break;
}
}
if (cfg_cache->num >= RT_WLAN_CFG_INFO_MAX)
{
break;
}
if (equal_flag == RT_FALSE)
{
t_info = rt_realloc(cfg_cache->cfg_info, sizeof(struct rt_wlan_cfg_info) * (cfg_cache->num + 1));
if (t_info == RT_NULL)
{
rt_free(head);
WLAN_CFG_UNLOCK();
return -RT_ERROR;
}
cfg_cache->cfg_info = t_info;
cfg_cache->cfg_info[cfg_cache->num] = cfg_info[i];
cfg_cache->num ++;
}
}
rt_free(head);
WLAN_CFG_UNLOCK();
return RT_EOK;
}
int rt_wlan_cfg_get_num(void)
{
rt_wlan_cfg_init();
return cfg_cache->num;
}
int rt_wlan_cfg_read(struct rt_wlan_cfg_info *cfg_info, int num)
{
rt_wlan_cfg_init();
if ((cfg_info == RT_NULL) || (num <= 0))
return 0;
/* copy data */
WLAN_CFG_LOCK();
num = cfg_cache->num > num ? num : cfg_cache->num;
rt_memcpy(&cfg_cache->cfg_info[0], cfg_info, sizeof(struct rt_wlan_cfg_info) * num);
WLAN_CFG_UNLOCK();
return num;
}
rt_err_t rt_wlan_cfg_save(struct rt_wlan_cfg_info *cfg_info)
{
rt_err_t err = RT_EOK;
struct rt_wlan_cfg_info *t_info;
int idx = -1, i = 0;
rt_wlan_cfg_init();
/* parameter check */
if ((cfg_info == RT_NULL) || (cfg_info->info.ssid.len == 0))
{
return -RT_EINVAL;
}
/* if (iteam == cache) exit */
WLAN_CFG_LOCK();
for (i = 0; i < cfg_cache->num; i++)
{
if ((cfg_cache->cfg_info[i].info.ssid.len == cfg_info->info.ssid.len) &&
(rt_memcmp(&cfg_cache->cfg_info[i].info.ssid.val[0], &cfg_info->info.ssid.val[0],
cfg_cache->cfg_info[i].info.ssid.len) == 0) &&
(rt_memcmp(&cfg_cache->cfg_info[i].info.bssid[0], &cfg_info->info.bssid[0], RT_WLAN_BSSID_MAX_LENGTH) == 0))
{
idx = i;
break;
}
}
if ((idx == 0) && (cfg_cache->cfg_info[i].key.len == cfg_info->key.len) &&
(rt_memcmp(&cfg_cache->cfg_info[i].key.val[0], &cfg_info->key.val[0], cfg_info->key.len) == 0))
{
WLAN_CFG_UNLOCK();
return RT_EOK;
}
/* not find iteam with cache, Add iteam to the head */
if ((idx == -1) && (cfg_cache->num < RT_WLAN_CFG_INFO_MAX))
{
t_info = rt_realloc(cfg_cache->cfg_info, sizeof(struct rt_wlan_cfg_info) * (cfg_cache->num + 1));
if (t_info == RT_NULL)
{
WLAN_CFG_UNLOCK();
return -RT_ENOMEM;
}
cfg_cache->cfg_info = t_info;
cfg_cache->num ++;
}
/* move cache info */
i = (i >= RT_WLAN_CFG_INFO_MAX ? RT_WLAN_CFG_INFO_MAX - 1 : i);
for (; i; i--)
{
cfg_cache->cfg_info[i] = cfg_cache->cfg_info[i - 1];
}
/* add iteam to head */
cfg_cache->cfg_info[i] = *cfg_info;
WLAN_CFG_UNLOCK();
/* save info to flash */
err = rt_wlan_cfg_cache_save();
return err;
}
int rt_wlan_cfg_read_index(struct rt_wlan_cfg_info *cfg_info, int index)
{
rt_wlan_cfg_init();
if ((cfg_info == RT_NULL) || (index < 0))
return 0;
WLAN_CFG_LOCK();
if (index >= cfg_cache->num)
{
WLAN_CFG_UNLOCK();
return 0;
}
/* copy data */
*cfg_info = cfg_cache->cfg_info[index];
WLAN_CFG_UNLOCK();
return 1;
}
int rt_wlan_cfg_delete_index(int index)
{
struct rt_wlan_cfg_info *cfg_info;
int i;
rt_wlan_cfg_init();
if (index < 0)
return -1;
WLAN_CFG_LOCK();
if (index >= cfg_cache->num)
{
WLAN_CFG_UNLOCK();
return -1;
}
/* malloc new mem */
cfg_info = rt_malloc(sizeof(struct rt_wlan_cfg_info) * (cfg_cache->num - 1));
if (cfg_info == RT_NULL)
{
WLAN_CFG_UNLOCK();
return -1;
}
/* copy data to new mem */
for (i = 0; i < cfg_cache->num; i++)
{
if (i < index)
{
cfg_info[i] = cfg_cache->cfg_info[i];
}
else if (i > index)
{
cfg_info[i - 1] = cfg_cache->cfg_info[i];
}
}
rt_free(cfg_cache->cfg_info);
cfg_cache->cfg_info = cfg_info;
cfg_cache->num --;
WLAN_CFG_UNLOCK();
return 0;
}
void rt_wlan_cfg_delete_all(void)
{
rt_wlan_cfg_init();
/* delete all iteam */
WLAN_CFG_LOCK();
cfg_cache->num = 0;
rt_free(cfg_cache->cfg_info);
cfg_cache->cfg_info = RT_NULL;
WLAN_CFG_UNLOCK();
}
void rt_wlan_cfg_dump(void)
{
int index = 0;
struct rt_wlan_info *info;
struct rt_wlan_key *key;
char *security;
rt_wlan_cfg_init();
rt_kprintf(" SSID PASSWORD MAC security chn\n");
rt_kprintf("------------------------------- ------------------------------- ----------------- -------------- ---\n");
for (index = 0; index < cfg_cache->num; index ++)
{
info = &cfg_cache->cfg_info[index].info;
key = &cfg_cache->cfg_info[index].key;
if (info->ssid.len)
rt_kprintf("%-32.32s", &info->ssid.val[0]);
else
rt_kprintf("%-32.32s", " ");
if (key->len)
rt_kprintf("%-32.32s", &key->val[0]);
else
rt_kprintf("%-32.32s", " ");
rt_kprintf("%02x:%02x:%02x:%02x:%02x:%02x ",
info->bssid[0],
info->bssid[1],
info->bssid[2],
info->bssid[3],
info->bssid[4],
info->bssid[5]
);
switch (info->security)
{
case SECURITY_OPEN:
security = "OPEN";
break;
case SECURITY_WEP_PSK:
security = "WEP_PSK";
break;
case SECURITY_WEP_SHARED:
security = "WEP_SHARED";
break;
case SECURITY_WPA_TKIP_PSK:
security = "WPA_TKIP_PSK";
break;
case SECURITY_WPA_AES_PSK:
security = "WPA_AES_PSK";
break;
case SECURITY_WPA2_AES_PSK:
security = "WPA2_AES_PSK";
break;
case SECURITY_WPA2_TKIP_PSK:
security = "WPA2_TKIP_PSK";
break;
case SECURITY_WPA2_MIXED_PSK:
security = "WPA2_MIXED_PSK";
break;
case SECURITY_WPS_OPEN:
security = "WPS_OPEN";
break;
case SECURITY_WPS_SECURE:
security = "WPS_SECURE";
break;
default:
security = "UNKNOWN";
break;
}
rt_kprintf("%-14.14s ", security);
rt_kprintf("%3d \n", info->channel);
}
}
#endif
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