mbtk/libmbtk_lib/wifi/mbtk_wifi_ap.c

#include "mbtk_log.h"
#include "mbtk_wifi_ap.h"

#include <stdlib.h>
#include <stdio.h>


int mbtk_wifi_get_setting(const char *path, const char *key, char *value, int value_max_len)
{
	int ret = 0;
	int cnt = 0;
	int key_len; 
	int line_len;
	int value_len;
	FILE *fp;
	char line_buf[SETTING_LINE_MAX_LEN] = {0}; 
	
	if (NULL == path || NULL == key || NULL == value || 0 >= value_max_len) {
		return -1;
	}
	
	key_len = strlen(key);
	if (0 >= key_len || SETTING_KEY_MAX_LEN < key_len) {
		return -2;
	}
	
	if (F_OK != access(path, F_OK)) {
		return -3;
	}
	
	fp = fopen(path, "r");
	if (NULL == fp) {
		return -4;
	}
	
	while(NULL != fgets(line_buf, SETTING_LINE_MAX_LEN-1, fp)) {
		line_len = strlen(line_buf);
		if (line_len > key_len) {
			if (0 == strncmp(line_buf, key, key_len) && SETTING_SPLIT_CHAR == line_buf[key_len]) {
				ret = 1;
				break;
			}
		}
		memset(line_buf, 0, sizeof(line_buf));
		
		cnt++;
		if (SETTING_LINE_MAX < cnt) {
			break;
		}	
	}
	
	fclose(fp);
	
	if (1 == ret) {
		value_len = line_len - key_len - 1;
		if (0 < value_len) {
			if (value_len > value_max_len) {
				value_len = value_max_len;
			}
	
			strncpy(value, &line_buf[key_len + 1], value_len);
			value[value_len] = '\0';
			
	
			if ('\n' == value[value_len-1]) {
				value[value_len-1] = '\0';
			}
			if (2 <= value_len && '\r' == value[value_len-2]) {
				value[value_len-2] = '\0';
			}
			
		} else {
			value[0] = '\0';
		}		
	}
	
	return ret;
}
 

int mbtk_wifi_set_setting(const char *path, const char *key, const char *value)
{
	int i, j;
	int fd;
	int tmp_data_cnt = 0;
	int ret = 0;
	int cnt = 0;
	int key_len; 
	int line_len;
	int value_len;
	int len;
	FILE *fp = NULL;
	char tmp_key[SETTING_KEY_MAX_LEN+1] = {0};
	char tmp_value[SETTING_VALUE_MAX_LEN+1] = {0};
	char line_buf[SETTING_LINE_MAX_LEN] = {0};
	char tmp_data_buf[SETTING_LINE_MAX][SETTING_LINE_MAX_LEN] = {0};
	
	
	if (NULL == path || NULL == key || NULL == value) {
		return -1;
	}
	
	key_len = strlen(key);
	if (0 >= key_len || SETTING_KEY_MAX_LEN < key_len) {
		return -2;
	}
	
	for (i = 0, j = 0; i < key_len; i++) {
		if ('\r' == key[i] || '\n' == key[i]) {
			break;
		}
		tmp_key[j++] = key[i];
	}
	key_len = j;
	
	value_len = strlen(value);
	if (SETTING_VALUE_MAX_LEN < value_len) {
		value_len = SETTING_VALUE_MAX_LEN;
	} else if (value_len <= 0) {
		value_len = 0;
	}
	
	for (i = 0, j = 0; i < value_len; i++) {
		if ('\r' == value[i] || '\n' == value[i]) {
			break;
		}
		tmp_value[j++] = value[i];
	}
	value_len = j;


    /*
	if (F_OK != access(path, F_OK)) 
	{
		fp = fopen(path, "w+");
		if (NULL == fp) {
			return -3;
		}
 

		sprintf(line_buf, "%s%c%s\n", SETTING_VERSION_KEY, SETTING_SPLIT_CHAR, SETTING_VERSION_VALUE);
		line_len = strlen(line_buf);
		ret = fwrite(line_buf, 1, line_len, fp);		
 

		memset(line_buf, 0, sizeof(line_buf));
		sprintf(line_buf, "%s%c%s\n", tmp_key, SETTING_SPLIT_CHAR, tmp_value);
		line_len = strlen(line_buf);
		if (line_len != fwrite(line_buf, 1, line_len, fp)) {
			ret = -4;
		} else {
			ret = 2;
		}
 
		fclose(fp);
		return ret;
	}
    */

	if (NULL == fp) {
		fp = fopen(path, "r+");
		if (NULL == fp) {
			return -5;
		}
	}
	
	while(NULL != fgets(line_buf, SETTING_LINE_MAX_LEN-1, fp)) {
		line_len = strlen(line_buf);
		if (line_len > key_len) {
			if (1 != ret && 0 == strncmp(line_buf, tmp_key, key_len) && SETTING_SPLIT_CHAR == line_buf[key_len]) {
				ret = 1;
				sprintf(line_buf, "%s%c%s\n", tmp_key, SETTING_SPLIT_CHAR, tmp_value);
			}
		}
		
		strcpy(tmp_data_buf[tmp_data_cnt++], line_buf);
		
		memset(line_buf, 0, sizeof(line_buf));
		
		cnt++;
		if (SETTING_LINE_MAX < cnt) {
			break;
		}	
	}
	
	
	if (1 == ret) {
		rewind(fp);
		for (i = 0; i < tmp_data_cnt; i++) {
			fputs(tmp_data_buf[i], fp);
		}
		
		len = ftell(fp);
		fd = fileno(fp);
        if(0 > ftruncate(fd, len))
        {
            return -1;
        }
		
	} else { 
		if (SETTING_LINE_MAX > cnt) {
			sprintf(line_buf, "%s%c%s\n", tmp_key, SETTING_SPLIT_CHAR, tmp_value);
			line_len = strlen(line_buf);
			if (line_len != fwrite(line_buf, 1, line_len, fp)) {
				ret = -6;
			}
		} else {
			ret = -7;
		}		
	}	
	
	fclose(fp);
	
	return ret;
}
 


int mbtk_wifi_ap_start(void)
{
    if(0 > system("hostapd /etc/wifi/hostapd.conf -B"))
    {
        return -1;
    }

    if(0 > system("sleep 5s"))
    {
        return -1;
    }

    if(0 > system("brctl addif br-lan wlan0"))
    {
        return -1;
    }

    if(0 > system("iptables -t nat -A POSTROUTING -o ccinet0 -j MASQUERADE --random"))
    {
        return -1;
    }

    return 0;
}

int mbtk_wifi_ap_stop(void)
{
    if(0 > system("killall hostapd"))
    {
        return -1;
    }

    return 0;

}