ap/lib/libsoftap/netotherapi.c

/**
* @file netotherapi.c
* @brief Public APIs of Sanechips
*
* Copyright (C) 2017 Sanechips Technology Co., Ltd.
* @author  Linxu Gebin
* @defgroup si_id Sanechips
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*************************************************************************
*/

/*******************************************************************************
 *							 Include header files							   *
 ******************************************************************************/

#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <syslog.h>
#include <sys/klog.h>
#include <sys/msg.h>
#include "message.h"
#include <sys/time.h>
#include <asm/types.h>
#include <netinet/ether.h>
#include <netinet/in.h>
#include <net/if.h>
#include <netdb.h>
#include <sys/socket.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <sys/types.h>
#include <pthread.h>
#include "softap_api.h"
#include <netotherapi.h>
#include <dirent.h>
#include <limits.h>

/*******************************************************************************
 *                             Type definitions                                *
 ******************************************************************************/
/**
* @brief route information
* @param dstAddr destination address
* @param srcAddr source address
* @param gateWay gateWay
* @param ifName NIC name
*/
struct route_info {
	u_int dstAddr;
	u_int srcAddr;
	u_int gateWay;
	char ifName[IF_NAMESIZE];
};

#define BUFSIZE 8192

#define SPINLOCK_IOC_MAGIC	'S'

#define SPINLOCK_GET_STATUS  _IOWR(SPINLOCK_IOC_MAGIC,1,char *)

#define READ_BUF_SIZE 56
/*******************************************************************************
 *                      Inline function implementations                        *
 ******************************************************************************/
inline char *strip_space(char *str)
{
	while (*str == ' ')
		str++;
	return str;
}
/*******************************************************************************
 *                      Local function implementations                         *
 ******************************************************************************/
/* дÎļþ²Ù×÷º¯Êý */
int write_file(const char *filepath, int flags, const char *buf, int size)
{
	int fd = 0;
	int ret = 0;

	fd = open(filepath, flags, 0644);
	if (fd < 0) {
		slog(MISC_PRINT, SLOG_ERR, "write_to_file open %s fail, error:%s! \n", filepath, strerror(errno));
		ret = -1;
		goto out;
	}

    ret = TEMP_FAILURE_RETRY(write(fd, buf, size));
	if (ret != size) {
		slog(MISC_PRINT, SLOG_ERR, "write_to_file write %s fail, error:%s! \n", filepath, strerror(errno));
		ret = -1;
		goto out;
	}
	if(fsync(fd) < 0)
    {
        // todo: cov m
    }  
    
	ret = 0;

out:
	if (fd >= 0)
		close(fd);
	return ret;
}

/* дÎļþ: ¸²¸Çд */
int write_to_file(const char *filepath, const char *buf, int size)
{
	return write_file(filepath, O_WRONLY | O_CREAT | O_TRUNC, buf, size);
}

/* дÎļþ: β²¿×·¼Óд  */
int append_to_file(const char *filepath, const char *buf, int size)
{
	return write_file(filepath, O_WRONLY | O_APPEND | O_CREAT, buf, size);
}

//¿â½Ó¿Úctime¡¢asctime»á»»ÐУ¬Ôì³ÉÿÌõlog±»·ÖÐÐÏÔʾ£¬²»·½±ã¿´£¬ËùÒÔ½«ctimeÔ´ÂëÉÔ΢¸ÄÔìÏÂ
static char *str_ctime(const struct tm *timeptr)
{
	/*static const char wday_name[][4] = {
	  "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
	};*/

	static const char mon_name[][4] = {
		"Jan", "Feb", "Mar", "Apr", "May", "Jun",
		"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
	};

	static char result[26];

	/*sprintf(result, "%.3s %.3s%3d %.2d:%.2d:%.2d %d",
	  wday_name[timeptr->tm_wday],
	  mon_name[timeptr->tm_mon],
	  timeptr->tm_mday, timeptr->tm_hour,
	  timeptr->tm_min, timeptr->tm_sec,
	  1900 + timeptr->tm_year);*/
	snprintf(result, sizeof(result), "%.3s%3d %.2d:%.2d:%.2d %d",
	        mon_name[timeptr->tm_mon],
	        timeptr->tm_mday, timeptr->tm_hour,
	        timeptr->tm_min, timeptr->tm_sec,
	        1900 + timeptr->tm_year);
	return result;
}

/*******************************************************************************
 *                      Global function implementations                        *
 ******************************************************************************/

/****************************************/
//input:  nv_str:nvÄÚÈÝÖ¸Õë    * nv_param ½âÎöºó²ÎÊýµÄÖ¸Õë
//output:   param_num     nv_param
//ʾÀý:
//   int num;
//   char** nv_param;
//   num = nv_analyze(nv_str,&nv_param)
//   strcmp(nv_param[0],"aaa") ...
//   strcmp(nv_param[1],"bbb") ...
//   ...
//   free(nv_param);
//
/****************************************/

int nv_analyze(char* nv_str, char*** nv_param)
{
	int param_num = 1;
	int i = 0;
	char* str_ptr;
	char** mem_ptr;
	char* tmp_ptr;
	for (str_ptr = nv_str; *str_ptr != '\0'; str_ptr++) {
		if (*str_ptr == '+')
			param_num++;
	}
	mem_ptr = (char**)malloc((1 + sizeof(char*)) * param_num + strlen(nv_str));
	if (mem_ptr == NULL) {//klocwork
		return -1;
	}
	memset(mem_ptr, 0, (1 + sizeof(char*)) * param_num + strlen(nv_str));
	* nv_param = mem_ptr;
	str_ptr = strtok(nv_str, "+");
	tmp_ptr = (char*)(mem_ptr + param_num);
	while (str_ptr != NULL) {
		memcpy((mem_ptr + i), &tmp_ptr, sizeof(char*));
		strcpy(tmp_ptr, str_ptr);
		tmp_ptr = (char*)((long)tmp_ptr + strlen(str_ptr) + 1);
		i ++;
		str_ptr = strtok(NULL, "+");
	}
	return param_num;
}


char* getField(char *a_line, char *delim, int count)
{
	int i = 0;
	char *tok = NULL;
	char *save = NULL;
	tok = strtok_r(a_line, delim, &save);
	while (tok) {
		if (i == count)
			break;
		i++;
		tok = strtok_r(NULL, delim, &save);
	}
	if (tok)
		return tok;

	return NULL;
}

void  free_dhcp_list(struct list_head *dhcp_info_list)
{
	DHCPOFFERADDR_LIST_t *dhcp_info_temp  = NULL;
	DHCPOFFERADDR_LIST_t *dhcp_info_temp1 = NULL;

	list_for_each_entry_safe(dhcp_info_temp, dhcp_info_temp1, dhcp_info_list, list) {
		list_del(&dhcp_info_temp->list);
		free(dhcp_info_temp);
	}
}

void  free_laninfo_list(struct list_head *file_info_list)
{
	LAN_INFO_LIST_t *lan_info_list_tmp  = NULL;
	LAN_INFO_LIST_t *lan_info_list_tmp1 = NULL;

	list_for_each_entry_safe(lan_info_list_tmp, lan_info_list_tmp1, file_info_list, list) {
		list_del(&lan_info_list_tmp->list);
		free(lan_info_list_tmp);
	}

}

/**************************************************************************
* º¯ÊýÃû³Æ£º getIfStatistic
* ¹¦ÄÜÃèÊö£º »ñÈ¡ÍøÂçÉ豸µ±Ç°Á÷Á¿
* ²ÎÊý˵Ã÷£º interface:     Íø¿ÚÉ豸Ãû³Æ
*            type:          Á÷Á¿ÀàÐÍ£¬ÉÏÐС¢ÏÂÐбÈÌØ»ò°ü¸öÊý
*            result_data:   ±£´æÁ÷Á¿Öµ
* ·µ »Ø Öµ£º ʧ°Ü·µ»Ø-1£¬³É¹¦·µ»Ø0
**************************************************************************/
int getIfStatistic(char *interface, int type, unsigned long long *result_data)
{
	int found_flag = 0;
	int skip_line = 2;
	char temp_rcv[64] = {0};
	char buf[1024], *field, *semiColon = NULL;
	long long result_data_num = 0;
	FILE *fp = fopen(PROC_IF_STATISTIC, "r");
	if (!fp) {
		slog(MISC_PRINT, SLOG_ERR, "no proc?\n");
		return -1;
	}

	while (fgets(buf, 1024, fp)) {
		char *ifname;
		if (skip_line != 0) {
			skip_line--;
			continue;
		}
		if (!(semiColon = strchr(buf, ':')))
			continue;
		*semiColon = '\0';
		ifname = buf;
		ifname = strip_space(ifname);

		if (!strcmp(ifname, interface)) {
			found_flag = 1;
			break;
		}
	}
	fclose(fp);

	if (found_flag == 0) {
		slog(MISC_PRINT, SLOG_DEBUG, "[fluxstat]getIfStatistic no found data======\n");
		return -1;
	}

	semiColon++;

	switch (type) {
	case TXBYTE:
		if ((field = getField(semiColon, " ", 8))) {
			errno = 0;
			result_data_num = strtoull(field, NULL, 10);
			if (errno == ERANGE)// kw ERRNO.NOT_CHECKED
			{
				printf("strtoull errno %d: %s\n", errno, strerror(errno));
			}
			if (result_data_num < 0 || result_data_num > LLONG_MAX-1)
				result_data_num = 0;
			*result_data = result_data_num;
			
			slog(MISC_PRINT, SLOG_DEBUG, "[getIfStatistic]TXBYTE field:%s, result_data:%llu\n", field, *result_data);
			return 0; //kw 3
		}
		break;
	case TXPACKET:
		if ((field = getField(semiColon, " ", 9))) {
			errno = 0;
			result_data_num = strtoull(field, NULL, 10);
			if (errno == ERANGE)// kw ERRNO.NOT_CHECKED
			{
				printf("strtoull errno %d: %s\n", errno, strerror(errno));
			}
			if (result_data_num < 0 || result_data_num > LLONG_MAX-1)
				result_data_num = 0;
			*result_data = result_data_num;
			return 0;
		}
		break;
	case TXERR:
		if ((field = getField(semiColon, " ", 10))) {
			errno = 0;
			result_data_num = strtoull(field, NULL, 10);
			if (errno == ERANGE)// kw ERRNO.NOT_CHECKED
			{
				printf("strtoull errno %d: %s\n", errno, strerror(errno));
			}
			if (result_data_num < 0 || result_data_num > LLONG_MAX-1)
				result_data_num = 0;
			*result_data = result_data_num;
			
			return 0; //kw 3
		}
		break;
	case TXDROP:
		if ((field = getField(semiColon, " ", 11))) {
			errno = 0;
			result_data_num = strtoull(field, NULL, 10);
			if (errno == ERANGE)// kw ERRNO.NOT_CHECKED
			{
				printf("strtoull errno %d: %s\n", errno, strerror(errno));
			}
			if (result_data_num < 0 || result_data_num > LLONG_MAX-1)
				result_data_num = 0;
			*result_data = result_data_num;
			return 0;
		}
		break;
	case RXBYTE:
		if ((field = getField(semiColon, " ", 0))) {
			errno = 0;
			result_data_num = strtoull(field, NULL, 10);
			if (errno == ERANGE)// kw ERRNO.NOT_CHECKED
			{
				printf("strtoull errno %d: %s\n", errno, strerror(errno));
			}
			if (result_data_num < 0 || result_data_num > LLONG_MAX-1)
				result_data_num = 0;
			*result_data = result_data_num;
			slog(MISC_PRINT, SLOG_DEBUG, "[getIfStatistic]RXBYTE field:%s, result_data:%llu\n", field, *result_data);
			return 0;
		}
		break;
	case RXPACKET:
		if ((field = getField(semiColon, " ", 1))) {
			errno = 0;
			result_data_num = strtoull(field, NULL, 10);
			if (errno == ERANGE)// kw ERRNO.NOT_CHECKED
			{
				printf("strtoull errno %d: %s\n", errno, strerror(errno));
			}
			if (result_data_num < 0 || result_data_num > LLONG_MAX-1)
				result_data_num = 0;
			*result_data = result_data_num;
			return 0;
		}
		break;
	case RXERR:
		if ((field = getField(semiColon, " ", 2))) {
			errno = 0;
			result_data_num = strtoull(field, NULL, 10);
			if (errno == ERANGE)// kw ERRNO.NOT_CHECKED
			{
				printf("strtoull errno %d: %s\n", errno, strerror(errno));
			}
			if (result_data_num < 0 || result_data_num > LLONG_MAX-1)
				result_data_num = 0;
			*result_data = result_data_num;
			return 0;
		}
		break;
	case RXDROP:
		if ((field = getField(semiColon, " ", 3))) {
			errno = 0;
			result_data_num = strtoull(field, NULL, 10);
			if (errno == ERANGE)// kw ERRNO.NOT_CHECKED
			{
				printf("strtoull errno %d: %s\n", errno, strerror(errno));
			}
			if (result_data_num < 0 || result_data_num > LLONG_MAX-1)
				result_data_num = 0;
			*result_data = result_data_num;
			return 0;
		}
		break;
	}
	return -1;
}

void *safe_malloc(int size, BOOL is_assert)
{
	void *ret = malloc(size);

	if (ret == NULL) {
		if (is_assert == TRUE) {
			assert(ret);
		} else {
			printf("[%s][%s] ----can not get memory", __FILE__, __FUNCTION__);
		}
	} else {
		memset(ret, 0, size);
	}

	return ret;
}

//ÊäÈësize±ØÐëÊÇdestµÄ³¤¶È
void safe_strcpy(char *dest, char *source, int size)
{
	if (dest == NULL || source == NULL || size < 1) {
		return;
	}

	strncpy(dest, source, size - 1);
	dest[size - 1] = '\0';
}

int get_dev_list(struct pc_node* mypc_node)
{
	int ret = 0;

	ret = netioctl_handle(NIOCGPCINFO, mypc_node);
	if (-1 == ret) {
		slog(NET_PRINT, SLOG_ERR, "NIOCGPCINFO err");
		return -1;
	}
	return 0;
}

int  zte_get_mac_list_from_lease(struct list_head *dhcp_list_info)
{
	FILE *leaseFile    = NULL;
	int64_t leaseFirst = 0;
	char buf[32];

	DHCPOFFERADDRNET dhcpInfo = {0};

	char path_conf[50] = {0};
	char path_file[100] = {0};

	if (!list_empty(dhcp_list_info))
		return -1;

	sc_cfg_get("path_conf", path_conf, sizeof(path_conf));
	sprintf(path_file, "%s/udhcpd.leases", path_conf);

	leaseFile = fopen(path_file, "r");
	if (leaseFile == NULL) {
		fprintf(stderr, "can not open file udhcpd.leases.");
		return -1 ;
	}

	if (fread(&leaseFirst, 1, sizeof(leaseFirst), leaseFile) != sizeof(leaseFirst)) {
		fprintf(stderr, "read the first part of udhcpd.leases fail!");
		fclose(leaseFile);
		return -1 ;
	}

	memset(buf, 0x00, sizeof(buf));
	sc_cfg_get("dhcpEnabled", buf, sizeof(buf));
	if (strcmp(buf, "0") == 0) {
		fclose(leaseFile);
		return -1 ;
	}

	while ((fread(&dhcpInfo, 1, sizeof(dhcpInfo), leaseFile) == sizeof(dhcpInfo))) {
		DHCPOFFERADDR_LIST_t *dhcpInfo_ptr = (DHCPOFFERADDR_LIST_t *)safe_malloc(sizeof(DHCPOFFERADDR_LIST_t), TRUE);
		if (!dhcpInfo_ptr) {
			slog(NET_PRINT, SLOG_ERR, "get_lan_info_list safe_malloc dhcpInfo_ptr fail \n");
			return -1;
		}
		memcpy(&(dhcpInfo_ptr->dhcp_info), &dhcpInfo, sizeof(DHCPOFFERADDRNET));
		list_add_tail(&dhcpInfo_ptr->list, dhcp_list_info);
	}

	fclose(leaseFile);
	return 0;
}

void flash_file(char *file, char *file_num)
{
	char newFile[128] = {0};
	char oldFile[128] = {0};
	int i = 0;//klocwork
	int i_file_num = atoi(file_num);

    if(i_file_num < 0 || i_file_num > INT_MAX-1)
    {
        return ;
    }
    
	for (i = i_file_num - 2; i > 0 && i < 1000; i--) {
		sprintf(newFile, "%s_bk%d", file, i);
		sprintf(oldFile, "%s_bk%d", file, i + 1);
		if ((access(newFile, F_OK)) == 0) {
			if(rename(newFile, oldFile) < 0){
                // cov M 
            }
		}
	}
	sprintf(newFile, "%s_bk1", file);

    if(rename(file, newFile) < 0)
    {
        // cov M
    }
}

void file_write(char *filename, char *info)
{
	FILE *fp;
	char logpath[128]  = {0};
	char logname[128] = {0};
	char filesize[32]	= {0};
	char temp[64]	= {0};
	int flag = 0;
	time_t now;
	struct tm *timenow;

	time(&now);
	timenow = localtime(&now);
	if (!timenow) {//klocwork
		printf("localtime get err.\n");
		return;
	}

	if (!filename || 0 == strcmp(filename, "")) {
		printf("filename is err.\n");
		return;
	}

	//Ö¸¶¨logÎļþ´óС£¬Èç¹ûδָ¶¨¾ÍÓÃĬÈÏcomm_logsize
	sprintf(temp, "%s_logsize", filename);
	sc_cfg_get(temp, filesize, sizeof(filesize));
	if (0 == strcmp(filesize, "0")) {
		return ;
	} else if (0 == strcmp(filesize, "")) {
		sc_cfg_get("comm_logsize", filesize, sizeof(filesize));
		if (0 == strcmp(filesize, "0") || 0 == strcmp(filesize, "")) {
			printf("filesize is not set.\n");
			return;
		}
	}

	sc_cfg_get("path_log", logpath, sizeof(logpath));
	snprintf(logname, sizeof(logname), "%s%s.log", logpath, filename);

	fp = fopen(logname, "a");
	if (!fp) {
		printf("fopen %s failed \n", logname);
		return;
	}
	//flock»úÖƲ¢²»ÄÜÕæµÄÆðµ½lock×÷Ó㬷µ»Ø»áÔì³Éunlock²»µô
	/*
	else if (flock(fileno(fp), LOCK_EX) != 0)
	{
	    perror("flock");
		fclose(fp);
	    return;
	}*/

	fprintf(fp, "%s:%s\n", str_ctime(timenow), info);
	//fprintf(fp, "%s %s %s[%d]: %s", ctime(timenow), asctime(timenow), filename, getpid(), info);
	fflush(fp);
	fseek(fp, 0L, SEEK_END);

	if (ftell(fp) > atoi(filesize))
		flag = 1;

	//flock(fileno(fp), LOCK_UN);
	fclose(fp);

	if (flag == 1) {
		flash_file(logname, "2");
	}
}

int echo_file(char *filename, char*info)
{
	int len;
	int ret;
	int fd;
	if (!filename || 0 == strcmp(filename, "") || !info) {
		printf("echo filename is err.\n");
		return -1;
	}
	fd = open(filename, O_CREAT | O_TRUNC | O_RDWR, 777);
	if (fd < 0) {
		printf("%s open failed!\n", filename);
		return -1;
	}
	len = strlen(info);
	ret = write(fd, info, len);

	close(fd);

	return ret;
}

void save_file(char *filename, char* info)
{
	FILE* fp;
	char filepath[128]  = {0};
	char filesize[32]	= {0};
	char filenum[32]	= {0};
	char temp[64]	= {0};
	int flag = 0;
	time_t now;
	struct tm *timenow;
	time(&now);
	timenow = localtime(&now);
	if (!timenow) {//klocwork
		printf("localtime get err.\n");
		return;
	}

	if (!filename || 0 == strcmp(filename, "")) {
		printf("filename is err.\n");
		return;
	}
	sprintf(temp, "%sfile", filename);
	sc_cfg_get(temp, filepath, sizeof(filepath));
	sprintf(temp, "%sfileSize", filename);
	sc_cfg_get(temp, filesize, sizeof(filesize));
	if (0 == strcmp(filesize, "0") || 0 == strcmp(filesize, "")) {
		printf("filesize is not set.\n");
		return;
	}

	sprintf(temp, "%sNum", filename);
	sc_cfg_get(temp, filenum, sizeof(filenum));
	fp = fopen(filepath, "a");
	if (!fp) {
		printf("fopen %s failed \n", filepath);
		return;
	} else if (flock(fileno(fp), LOCK_EX) != 0) {
		perror("flock");
		fclose(fp);
		return;
	}

	fprintf(fp, "%s %s\n", str_ctime(timenow), info);
	fflush(fp);
	fseek(fp, 0L, SEEK_END);
	if (ftell(fp) > atoi(filesize))
		flag = 1;

	flock(fileno(fp), LOCK_UN);
	fclose(fp);

	if (flag == 1) {
		flash_file(filepath, "2");
	}
}

struct timeval timeget(void)
{
	struct timeval now;
	unsigned char  timestr[60] = {0};
	unsigned char  uptimestr[30] = {0};
	unsigned char * dotaddr = NULL;
	unsigned long second;
	char error = 0;
	FILE * timefile = NULL;
    int read_len = 0;

	timefile = fopen("/proc/uptime", "r");
	if (!timefile) {
		printf("[%s:line:%d] error opening '/proc/uptime'", __FILE__, __LINE__);
		error = 1;
		goto out;
	}
	//klocwork  cov M
	read_len = fread(timestr, sizeof(char), sizeof(timestr)-1, timefile);
	if (read_len == 0 ) {
		printf("[%s:line:%d] read '/proc/uptime' error", __FILE__, __LINE__);
		error = 1;
		goto out;
	}
	timestr[sizeof(timestr)-1] = '\0';//cov
	dotaddr = strchr(timestr, '.');
	if (dotaddr != NULL && (dotaddr - timestr) < (30 - 2))//cov
		memcpy(uptimestr, timestr, dotaddr - timestr + 2);
	else {
		printf("[%s:line:%d] uptime string is too long", __FILE__, __LINE__);
		error = 1;
		goto out;
	}
	uptimestr[dotaddr - timestr + 2] = '\0';

out:
	if (error) {
		now.tv_sec  = 0;
		now.tv_usec = 0;
	} else {
		now.tv_sec  = atol(uptimestr);
		now.tv_usec = 0;
	}
	if (timefile) {//klocwork
		fclose(timefile);
	}
	return now;
}

unsigned long time_sec()
{
	struct timeval uptime;

	uptime = timeget();
	//printf("uptime = %lu \n",(unsigned long)uptime.tv_sec);
	return uptime.tv_sec;
}

int get_lan_info_list(struct list_head *file_list_info)
{
	FILE *lanFile    = NULL;
	char buf[32];

	LAN_INFO_t lanInfo = {0};
	char path_conf[50] = {0};
	char path_file[100] = {0};

	if (!list_empty(file_list_info)) {
		return -1;
	}

	sc_cfg_get("path_conf", path_conf, sizeof(path_conf));
	sprintf(path_file, "%s/laninfo.tmp", path_conf);

	lanFile = fopen(path_file, "r");
	if (lanFile == NULL) {
		slog(NET_PRINT, SLOG_ERR, "fopen laninfo.tmp fail \n");
		return 0;
	}

	while (fread(&lanInfo, sizeof(LAN_INFO_t), 1, lanFile) == 1) {
		LAN_INFO_LIST_t *lanInfo_ptr = (LAN_INFO_LIST_t *)safe_malloc(sizeof(LAN_INFO_LIST_t), TRUE);
		if (!lanInfo_ptr) {
			slog(NET_PRINT, SLOG_ERR, "get_lan_info_list safe_malloc lanInfo_ptr fail \n");
			return -1;
		}
		memcpy(&(lanInfo_ptr->lan_info), &lanInfo, sizeof(LAN_INFO_t));
		list_add_tail(&lanInfo_ptr->list, file_list_info);
	}

	fclose(lanFile);
	return 0;

}

/* ÉèÖó¬Ê±Ëø£¬ ³¬Ê±0±íʾÓÀ¾ÃËø - Ôݲ»¶ÔÍ⣬ÐèÒªms¼¶±ðʱ¿ª·Å */
int set_wake_lock_timeout_ms(const char *lockid, unsigned long interval_ms)
{
	char *p = NULL;
	int ret = -1;

	if ((lockid == NULL) || (*lockid == '\0')) 
		return -1;

	if (interval_ms == 0) {
		ret = asprintf(&p, "%s", lockid);
	} else {
		ret = asprintf(&p, "%s %lu000000", lockid, interval_ms);
	}
	if (ret < 0) {
		ret = -1;
		goto out;
	}
	ret = write_to_file(WAKE_LOCK_PATH, p, strlen(p));
	
out:
	safe_free(p);
	return ret;
}

/* »ñÈ¡wakelockËø */
int set_wake_lock(const char *lockId)
{
	return set_wake_lock_timeout_ms(lockId, 0);
}

/* ÉèÖó¬Ê±Ëø */
int set_wake_lock_timeout(const char *lockId, unsigned long seconds)
{
	return set_wake_lock_timeout_ms(lockId, seconds * 1000);
}

/* ÊÍ·ÅwakelockËø */
int set_wake_unlock(const char *lockId)
{
	if ((lockId == NULL) || (*lockId == '\0'))
		return -1;
	
	return write_to_file(WAKE_UNLOCK_PATH, lockId, strlen(lockId));
}

int readNlSock(int sockFd, char *bufPtr, int seqNum, int pId)
{
	struct nlmsghdr *nlHdr;
	int readLen = 0, msgLen = 0;
	do {
		//ÊÕµ½Äں˵ÄÓ¦´ð
		if ((readLen = recv(sockFd, bufPtr, BUFSIZE - msgLen, 0)) < 0) {
			perror("SOCK READ: ");
			return -1;
		}


		nlHdr = (struct nlmsghdr *)bufPtr;
		//¼ì²éheaderÊÇ·ñÓÐЧ
		if ((NLMSG_OK(nlHdr, readLen) == 0) || (nlHdr->nlmsg_type == NLMSG_ERROR)) {
			perror("Error in recieved packet");
			return -1;
		}




		if (nlHdr->nlmsg_type == NLMSG_DONE) {
			break;
		} else {
			bufPtr += readLen;
			msgLen += readLen;
		}

		if ((nlHdr->nlmsg_flags & NLM_F_MULTI) == 0) {
			break;
		}
	} while ((nlHdr->nlmsg_seq != seqNum) || (nlHdr->nlmsg_pid != pId));
	return msgLen;
}

//coverity
static int net_RTA_OK(struct rtattr *rta, unsigned int len)
{
	return RTA_OK(rta, len);
}

//·ÖÎö·µ»ØµÄ·ÓÉÐÅÏ¢
void parseRoutes(struct nlmsghdr *nlHdr, struct route_info *rtInfo)
{
	struct rtmsg *rtMsg;
	struct rtattr *rtAttr;
	int rtLen, dstLen;
	//char *tempBuf = NULL;
	struct in_addr dst;
	struct in_addr gate;
	char cmd[128];
	char dstaddr[32], srcaddr[32];


	//tempBuf = (char *)malloc(100);
	rtMsg = (struct rtmsg *)NLMSG_DATA(nlHdr);
	// If the route is not for AF_INET or does not belong to main routing table
	//then return.
	if ((rtMsg->rtm_family != AF_INET) || (rtMsg->rtm_table != RT_TABLE_MAIN))
		return;
	//printf("rtmsg srclen:%d,dstlen:%d\n",rtMsg->rtm_src_len,rtMsg->rtm_dst_len);
	dstLen = rtMsg->rtm_dst_len; //·ÓɱíÖÐÄ¿µÄµØÖ·µÄÑÚÂ볤¶È


	rtAttr = (struct rtattr *)RTM_RTA(rtMsg);
	rtLen = RTM_PAYLOAD(nlHdr);
	for (; net_RTA_OK(rtAttr, rtLen); rtAttr = RTA_NEXT(rtAttr, rtLen)) {
		switch (rtAttr->rta_type) {
		case RTA_OIF:
			if_indextoname(*(int *)RTA_DATA(rtAttr), rtInfo->ifName);       //Íø¿¨Ãû³Æ
			break;
		case RTA_GATEWAY:
			rtInfo->gateWay = *(u_int *)RTA_DATA(rtAttr);                       //´ËÌõ·ÓÉÏîµÄÍø¹Ø
			break;
		case RTA_PREFSRC:
			rtInfo->srcAddr = *(u_int *)RTA_DATA(rtAttr);                       //·ÓÉÏîµÄÔ´µØÖ·
			break;
		case RTA_DST:
			rtInfo->dstAddr = *(u_int *)RTA_DATA(rtAttr);                       //·ÓÉÏîÖеÄÄ¿µÄµØÖ·
			break;
		}
	}
	dst.s_addr = rtInfo->dstAddr;

	printf("oif:%s\t", rtInfo->ifName);
	gate.s_addr = rtInfo->gateWay;
	printf("%s\n", (char *)inet_ntoa(gate));

	printf("src:%s\n", (char *)inet_ntoa(gate));
	snprintf(srcaddr, sizeof(srcaddr), "%s", (char *)inet_ntoa(gate));//klocwork
	gate.s_addr = rtInfo->dstAddr;
	printf("dst:%s\n", (char *)inet_ntoa(gate));

	//free(tempBuf);
	return;
}

/****************************************/
//½Ó¿Ú¹¦ÄÜ£º ¼ì²âÊÇ·ñÅäÖÃÁËȱʡ·ÓÉ£¬ÐèÒªÁ¬ÍâÍøµÄÓ¦ÓÿÉÒÔµ÷Óñ¾½Ó¿ÚÅжÏÍøÂçÊÇ·ñ¾ÍÐ÷
//return:
//    -1: error;
//     0: ÍøÂçδ¾ÍÐ÷
//     1: ÍøÂçÒѾÍÐ÷
/****************************************/
int default_route_check()
{
	struct nlmsghdr *nlMsg;
	struct rtmsg *rtMsg;
	struct route_info *rtInfo;
	char *msgBuf = malloc(BUFSIZE);


	int sock, len, msgSeq = 0;

    if(NULL == msgBuf) {
        softap_assert("");
		return -1;//klocwork
    }

	if ((sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE)) < 0) {
		perror("Socket Creation: ");
		free(msgBuf);
		return -1;
	}

	memset(msgBuf, 0, BUFSIZE);

	nlMsg = (struct nlmsghdr *)msgBuf;
	rtMsg = (struct rtmsg *)NLMSG_DATA(nlMsg);
	nlMsg->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); // Length of message.
	nlMsg->nlmsg_type = RTM_GETROUTE; // Get the routes from kernel routing table .
	nlMsg->nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST; // The message is a request for dump.
	nlMsg->nlmsg_seq = msgSeq++; // Sequence of the message packet.
	nlMsg->nlmsg_pid = getpid(); // PID of process sending the request.

	if (send(sock, nlMsg, nlMsg->nlmsg_len, 0) < 0) {
		printf("Write To Socket Failed¡­\n");
		free(msgBuf);
		close(sock);
		return -1;
	}

	if ((len = readNlSock(sock, msgBuf, msgSeq, getpid())) < 0) {
		printf("Read From Socket Failed¡­\n");
		free(msgBuf);
		close(sock);
		return -1;
	}


	rtInfo = (struct route_info *)malloc(sizeof(struct route_info));
	if (NULL == rtInfo) { //klocwork
		printf("Malloc route_info Failed¡­\n");
		free(msgBuf);
		close(sock);
		return -1;
	}
	for (; NLMSG_OK(nlMsg, len); nlMsg = NLMSG_NEXT(nlMsg, len)) {
		memset(rtInfo, 0, sizeof(struct route_info));
		parseRoutes(nlMsg, rtInfo);
		if (rtInfo->dstAddr == 0 && strlen(rtInfo->ifName)) {
			printf("default wan :%s \n", rtInfo->ifName);
			free(rtInfo);
			close(sock);
			free(msgBuf);
			return 1;
		}
	}
	free(rtInfo);
	close(sock);
	free(msgBuf);
	return 0;
}



/**************************************/
//½Ó¿Ú¹¦ÄÜ:   ¼ì²âflashÊÇ·ñ±»ÆäËûºËÕ¼ÓÃ
//return:
//             0   -----  flashûÓб»Õ¼ÓÃ
//		   1   -----  flashÕý±»ÆäËûºËÕ¼ÓÃ
//		  -1  -----  open½Úµãʧ°Ü
//		  -2  -----  ioctlʧ°Ü
/**************************************/

int flash_mutex_check()
{
	int fd, ret;
	char arg = 3;
	fd = open("/dev/softspinlock", O_RDWR);
	//printf("fd = %d \n",fd);
	if (fd < 0)
		return -1;

	ret = ioctl(fd, SPINLOCK_GET_STATUS, &arg);
	//printf("ret = %d  arg = %d \n",ret,arg);
	if (ret < 0) {
		close(fd);
		return -2;
	}
	close(fd);
	return arg;

}

//»ñÈ¡Ö¸¶¨Ïß³ÌÃûµÄpidºÅ£¬×¢Ò⣺µ÷Óøú¯Êý»ñÈ¡·µ»ØÖµ£¬Ê¹ÓúóÒ»¶¨ÒªÊͷŸÃÄÚ´æ¿Õ¼ä
pid_t* find_pid_by_name(char *pidName)
{
	DIR *dir;
	struct dirent *next;
	pid_t* pidList = NULL;
	pid_t* tmpList = NULL;
	int i = 0;
	
	//procÖаüÀ¨µ±Ç°µÄ½ø³ÌÐÅÏ¢£¬¶ÁÈ¡¸ÃĿ¼
	dir = opendir("/proc");
	if(!dir)
	{
		perror("Cannot open /proc");
		return pidList;
	}
	//±éÀú/procÏÂĿ¼
	while((next = readdir(dir)) != NULL)
	{
		FILE *status;
		char filename[READ_BUF_SIZE] = {0};//klocwork
		char filename1[READ_BUF_SIZE] = {0};//klocwork
		char name[READ_BUF_SIZE] = {0};
		//skip ".." since that is outside /proc
		if(0 == strcmp(next->d_name,".."))
			continue;
		//if it isn't a number,we skip it
		if(!isdigit(*next->d_name))
			continue;
		
		snprintf(filename,sizeof(filename),"/proc/%s/status",next->d_name);

		if(!(status = fopen(filename,"r")))
		{
			continue;
		}
		if(NULL == fgets(filename1,READ_BUF_SIZE-1,status))
		{
			fclose(status);
			continue;
		}
		fclose(status);
		
		//»ñÈ¡½ø³Ìpid£¬Í¬Ê±Ò²»áÓжà¸öÏàͬ½ø³ÌÃûµÄÇé¿ö
		sscanf(filename1, "%*s %s", name);
		if(0 == strcmp(name,pidName))
		{
			//pidList = realloc(pidList,sizeof(pid_t)*(i+2));
			//klocwork
			tmpList = realloc(pidList,sizeof(pid_t)*(i+2));
			if (NULL == tmpList) {
				continue;
			}
			pidList = tmpList;
			errno = 0;
			pidList[i++] = strtol(next->d_name,NULL,0);
			if (errno == ERANGE)// kw ERRNO.NOT_CHECKED
			{
				printf("strtol errno %d: %s\n", errno, strerror(errno));
			}
		}
	}
	if(pidList)
	{
		pidList[i] = 0;
	}
	closedir(dir);
	return pidList;
}

void handle_quit(int signo)
{
    pthread_exit(NULL);
}

/* gethostbyname¹¦ÄÜÖж¨Ê±Æ÷³¬Ê±´¦Àíº¯Êý */
void gethostbyname_timeout(int msg_id)
{
	slog(NET_PRINT, SLOG_DEBUG, "gethostbyname_timeout begin,msg_id=%d\n",msg_id);
	if(ipc_send_message(msg_id, msg_id, MSG_GET_HOST_BY_NAME_TIMEOUT,0, 0, 0) < 0)
    {
        // todo: for cov M
    }        
}

/**
* gethostbyname¹¦ÄÜÖд´½¨¶¨Ê±Æ÷
* second_time: ³¬Ê±Ê±³¤
* msg_id:         Ïß³Ìid
*/
void gethostbyname_creattimer(int second_time, int msg_id)
{
	slog(NET_PRINT, SLOG_DEBUG, "gethostbyname_creattimer begin\n");
	sc_timer_delete(TIMER_GETHOSTBYNAME_ID);
	sc_timer_create(TIMER_GETHOSTBYNAME_ID, TIMER_FLAG_ONCE, second_time*1000, gethostbyname_timeout, (void *)msg_id);
}

/* gethostbyname¹¦ÄÜÖÐɾ³ý¶¨Ê±Æ÷ */
void gethostbyname_deletetimer()
{
	slog(NET_PRINT, SLOG_DEBUG, "gethostbyname_deletetimer begin\n");
	sc_timer_delete(TIMER_GETHOSTBYNAME_ID);
}

void *gethostbyname_timer(void *arg)
{
	int time = 0;
	char *name = NULL;
	int msg_id;
	struct hostent* hptr = NULL;
	
	time =((struct gethostbyname_info *)arg)->time;
	name = ((struct gethostbyname_info *)arg)->name;
	msg_id = ((struct gethostbyname_info *)arg)->msg_id;

	slog(NET_PRINT, SLOG_DEBUG, "gethostbyname_timer time=%d,name=%s,msg_id=%d\n", time, name, msg_id);
	
	signal(SIGQUIT, handle_quit);
	
	gethostbyname_creattimer(time, msg_id); //Æð¶¨Ê±Æ÷
	
	hptr = gethostbyname(name);
	if(NULL != hptr) //»ñÈ¡µ½hostÐÅÏ¢
	{
		slog(NET_PRINT, SLOG_DEBUG, "gethostbyname_timer get info\n");
		gethostbyname_deletetimer(); //ɾ³ý¶¨Ê±Æ÷
		slog(NET_PRINT, SLOG_DEBUG, "gethostbyname_timer result hostname=%s\n",hptr->h_name);
		//¸øÖ÷½ø³Ì·¢ÏûÏ¢
		if(ipc_send_message(msg_id, msg_id, MSG_GET_HOST_BY_NAME_SUCCESS, sizeof(void *), (UCHAR *)&hptr, 0) < 0)
        {
            // todo: for cov M
        }      
		pthread_exit(NULL);
	}
	return NULL;
}

//·â×°gethostbynameº¯Êý£¬Ôö¼ÓÒ»¸ö³¬Ê±Ê±¼äµÄÈë²Î£¬timeµ¥Î»ÎªÃë
//Èç¹û³¬¹ý³¬Ê±Ê±¼äÈÔÈ»»ñÈ¡²»µ½hostÐÅÏ¢£¬Ôòº¯Êý·µ»Ø²»¼ÌÐø×èÈû
//¶¨Ê±Æ÷IDÏß³ÌÄÚ¹²Ïí£¬Ò»¸ö½ø³Ì²»ÒªÍ¬Ê±µ÷ÓøýӿÚ
struct hostent *gethostbyname_t(const char *name, int time)
{
	slog(NET_PRINT, SLOG_DEBUG, "gethostbyname_t begin\n");
	pthread_t pthread;
	int my_handle = 0;
	int module_id = MODULE_ID_AP_GETHOSTBYNAME_BASE;
	int ret = 0;
	int msg_ret = 0;
	struct hostent* hostresultinfo = NULL;
	struct gethostbyname_info myhostinfo = {0};
	MSG_BUF rsp_msg = {0};
	LONG msgSize =  sizeof(MSG_BUF) - sizeof(LONG);
	if(0 == time)
	{
		slog(NET_PRINT, SLOG_DEBUG, "gethostbyname_t time =0\n");
		return gethostbyname(name);
	}
	else
	{
		slog(NET_PRINT, SLOG_DEBUG, "gethostbyname_t time = %d\n",time);

        //¶¯Ì¬´´½¨ÁÙʱµÄÏûÏ¢¶ÓÁйܵÀ
        //msggetʹÓòÎÊýIPC_CREAT | IPC_EXCL| 0600£¬Åжϵ±Ç°module_idµÄÏûÏ¢¶ÓÁÐÊÇ·ñ
        //´æÔÚ£¬Èç¹û²»´æÔÚ£¬Ö±½Ó´´½¨ÐµÄÏûÏ¢¶ÓÁУ»Èç¹û´æÔÚ£¬·µ»Øֵδ-1£¬È»ºómodule_id
        //Öµ¼Ó1£¬²»¶ÏÑ­»·Ö±µ½ÕÒµ½Ã»ÓÐʹÓõÄmodule_idÖµ
		while((my_handle = msgget(module_id,IPC_CREAT | IPC_EXCL| 0600)) == -1) 
		{
        	module_id++;
			//µ±module_id´óÓÚMODULE_ID_ATDYNAMIC_ENDֵʱ£¬Ö÷¶¯¶ÏÑÔ
			if (module_id > MODULE_ID_AP_GETHOSTBYNAME_END) 
			{
				softap_assert("MODULE_ID_AP_GETHOSTBYNAME_END!!!!!!!!!!!\n");
			}
		}
		myhostinfo.time = time;
		strncpy(myhostinfo.name, name, sizeof(myhostinfo.name)-1);
		myhostinfo.msg_id = module_id;
		//Æð×ÓỊ̈߳¬ÔÚ×ÓÏß³ÌÀï´´½¨¶¨Ê±Æ÷
		ret = pthread_create(&pthread, NULL, (void *)gethostbyname_timer, (void *)&myhostinfo);
		if (ret < 0 || pthread == NULL) {
			slog(NET_PRINT, SLOG_DEBUG, "creat thread fail\n");
			return NULL;
		}
		while(1)
		{
			msg_ret = 0;
			memset(&rsp_msg, 0x00, sizeof(MSG_BUF));
			msg_ret = msgrcv(my_handle, &rsp_msg, msgSize, 0, 0);
			if (msg_ret < 0)
        	{
        		continue;
			}

			if(rsp_msg.usMsgCmd == MSG_GET_HOST_BY_NAME_SUCCESS)
			{
				slog(NET_PRINT, SLOG_DEBUG, "gethostbyname_t success\n");
				hostresultinfo = (struct hostent*)(*(int *)rsp_msg.aucDataBuf);
				slog(NET_PRINT, SLOG_DEBUG, "gethostbyname_t result:name=%s\n",hostresultinfo->h_name);
				return hostresultinfo;
			}
			else if(rsp_msg.usMsgCmd == MSG_GET_HOST_BY_NAME_TIMEOUT)
			{
				slog(NET_PRINT, SLOG_DEBUG, "gethostbyname_t fail\n");
				pthread_kill(pthread, SIGQUIT);
				return NULL;
			}
			else
			{
				slog(NET_PRINT, SLOG_ERR, "gethostbyname_t fail\n");
			}
		}
	}
}

/******************************************************************************/

#define DNS_SERVER_NUM 2

#define T_A 1 //Ipv4 address
#define T_NS 2 //Nameserver
#define T_CNAME 5 // canonical name
#define T_SOA 6 /* start of authority zone */
#define T_PTR 12 /* domain name pointer */
#define T_MX 15 //Mail server



//DNS header structure
struct DNS_HEADER {
	unsigned short id; // identification number

	unsigned char rd :1; // recursion desired
	unsigned char tc :1; // truncated message
	unsigned char aa :1; // authoritive answer
	unsigned char opcode :4; // purpose of message
	unsigned char qr :1; // query/response flag

	unsigned char rcode :4; // response code
	unsigned char cd :1; // checking disabled
	unsigned char ad :1; // authenticated data
	unsigned char z :1; // its z! reserved
	unsigned char ra :1; // recursion available

	unsigned short q_count; // number of question entries
	unsigned short ans_count; // number of answer entries
	unsigned short auth_count; // number of authority entries
	unsigned short add_count; // number of resource entries
};

//Constant sized fields of query structure
struct QUESTION {
	unsigned short qtype;
	unsigned short qclass;
};

//Constant sized fields of the resource record structure
#pragma pack(push, 1)
struct R_DATA {
	unsigned short type;
	unsigned short _class;
	unsigned int ttl;
	unsigned short data_len;
};
#pragma pack(pop)

//Pointers to resource record contents
struct RES_RECORD {
	unsigned char *name;
	struct R_DATA *resource;
	unsigned char *rdata;
};

//Structure of a Query
typedef struct {
	unsigned char *name;
	struct QUESTION *ques;
} QUERY;


void ChangetoDnsNameFormat(unsigned char* dns, unsigned char* host) {
	int lock = 0, i;
	strcat((char*) host, ".");

	for (i = 0; i < strlen((char*) host); i++) {
		if (host[i] == '.') {
			*dns++ = i - lock;
			for (; lock < i; lock++) {
				*dns++ = host[lock];
			}
			lock++; //or lock=i+1;
		}
	}
	*dns++ = '\0';
}

u_char* ReadName(unsigned char* reader, unsigned char* buffer, int* count) {
	unsigned char *name;
	unsigned int p = 0, jumped = 0, offset;
	int i, j;

	*count = 1;
	name = (unsigned char*) malloc(256);
	if (!name)
		return NULL;//klocwork

	name[0] = '\0';

	//read the names in 3www6google3com format
	while (*reader != 0) {
		if (*reader >= 192) {
			offset = (*reader) * 256 + *(reader + 1) - 49152; //49152 = 11000000 00000000 ;)
			reader = buffer + offset - 1;
			jumped = 1; //we have jumped to another location so counting wont go up!
		} else {
			name[p++] = *reader;
		}

		reader = reader + 1;

		if (jumped == 0) {
			*count = *count + 1; //if we havent jumped to another location then we can count up
		}
	}

	name[p] = '\0'; //string complete
	if (jumped == 1) {
		*count = *count + 1; //number of steps we actually moved forward in the packet
	}

	//now convert 3www6google3com0 to www.google.com
	for (i = 0; i < (int) strlen((const char*) name); i++) {
		p = name[i];
		for (j = 0; j < (int) p; j++) {
			name[i] = name[i + 1];
			i = i + 1;
		}
		name[i] = '.';
	}
	name[i - 1] = '\0'; //remove the last dot
	return name;
}

unsigned long my_gethostbyname(unsigned char *host, char *dev_name,char* dns_server, int query_type) {
	unsigned char buf[1025], *qname, *reader;
	int i, j, stop, s, ans_max;
	struct timeval tv;
	unsigned long ret = 0;
	struct ifreq ifr;
	
	struct sockaddr_in a;

	struct RES_RECORD answers[20], auth[20], addit[20]; //the replies from the DNS server
	struct sockaddr_in dest;

	struct DNS_HEADER *dns = NULL;
	struct QUESTION *qinfo = NULL;

	printf("Resolving %s", host);

	s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); //UDP packet for DNS queries
	if(s < 0)
    {
        printf("socket return fail \n");
        return ret;
    }   
	
	memset(&ifr,0,sizeof(ifr));    
	strncpy(ifr.ifr_name, dev_name, sizeof(ifr.ifr_name)-1);
	if(setsockopt(s,SOL_SOCKET,SO_BINDTODEVICE,(char*)&ifr,sizeof(ifr)) < 0){
		printf("SO_BINDTODEVICE fail \n");
		goto out;
	}
	tv.tv_sec = 5;
	tv.tv_usec = 0;
	if (setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0) {
		printf("socket option  SO_RCVTIMEO not support\n");
		goto out;
	}
	dest.sin_family = AF_INET;
	dest.sin_port = htons(53);
	dest.sin_addr.s_addr = inet_addr(dns_server); //dns servers

	//Set the DNS structure to standard queries
	dns = (struct DNS_HEADER *) &buf;

	dns->id = (unsigned short) htons(getpid());
	dns->qr = 0; //This is a query
	dns->opcode = 0; //This is a standard query
	dns->aa = 0; //Not Authoritative
	dns->tc = 0; //This message is not truncated
	dns->rd = 1; //Recursion Desired
	dns->ra = 0; //Recursion not available! hey we dont have it (lol)
	dns->z = 0;
	dns->ad = 0;
	dns->cd = 0;
	dns->rcode = 0;
	dns->q_count = htons(1); //we have only 1 question
	dns->ans_count = 0;
	dns->auth_count = 0;
	dns->add_count = 0;

	//point to the query portion
	qname = (unsigned char*) &buf[sizeof(struct DNS_HEADER)];

	ChangetoDnsNameFormat(qname, host);
	qinfo = (struct QUESTION*) &buf[sizeof(struct DNS_HEADER)
			+ (strlen((const char*) qname) + 1)]; //fill it

	qinfo->qtype = htons(query_type); //type of the query , A , MX , CNAME , NS etc
	qinfo->qclass = htons(1); //its internet (lol)

	printf("\nSending Packet...");
	if (sendto(s, (char*) buf,
			sizeof(struct DNS_HEADER) + (strlen((const char*) qname) + 1)
					+ sizeof(struct QUESTION), 0, (struct sockaddr*) &dest,
			sizeof(dest)) < 0) {
		perror("sendto failed");
	}
	printf("Done");

	//Receive the answer
	i = sizeof dest;
	printf("\nReceiving answer...");
	if (recvfrom(s, (char*) buf, sizeof(buf)-1, 0, (struct sockaddr*) &dest,
			(socklen_t*) &i) < 0) {
		perror("recvfrom failed");
	}
	*(buf+sizeof(buf)-1) = 0;
	printf("Done");

	dns = (struct DNS_HEADER*) buf;
	if((sizeof(struct DNS_HEADER) + 
		(strlen((const char*) qname) + 1)+ 
		sizeof(struct QUESTION)) >= sizeof(buf))
	{
		perror("my_gethostbyname error");
		goto out;
	}
	
	//move ahead of the dns header and the query field
	reader = &buf[sizeof(struct DNS_HEADER) + (strlen((const char*) qname) + 1)
			+ sizeof(struct QUESTION)];

	//printf("\nThe response contains : ");
	//printf("\n %d Questions.", ntohs(dns->q_count));
	//printf("\n %d Answers.", ntohs(dns->ans_count));
	//printf("\n %d Authoritative Servers.", ntohs(dns->auth_count));
	//printf("\n %d Additional records.\n\n", ntohs(dns->add_count));

	//Start reading answers
	stop = 0;
	//klocwork
	//ans_max = ((ntohs(dns->ans_count) <= (sizeof(answers)/sizeof(answers[0]))) ? ntohs(dns->ans_count) : (sizeof(answers)/sizeof(answers[0])));
	ans_max = ntohs(dns->ans_count);
	if (ans_max > (sizeof(answers)/sizeof(answers[0])))
		ans_max = (sizeof(answers)/sizeof(answers[0]));
	for (i = 0; i < ans_max; i++) 
	{
		answers[i].name = ReadName(reader, buf, &stop);
		reader = reader + stop;

		answers[i].resource = (struct R_DATA*) (reader);
		reader = reader + sizeof(struct R_DATA);

		if (ntohs(answers[i].resource->type) == 1) //if its an ipv4 address
				{
			answers[i].rdata = (unsigned char*) malloc(
					ntohs(answers[i].resource->data_len));

			for (j = 0; j < ntohs(answers[i].resource->data_len); j++) {
				answers[i].rdata[j] = reader[j];
			}

			answers[i].rdata[ntohs(answers[i].resource->data_len)] = '\0';

			reader = reader + ntohs(answers[i].resource->data_len);
		} else {
			answers[i].rdata = ReadName(reader, buf, &stop);
			reader = reader + stop;
		}
	}

	//print answers
	printf("\nAnswer Records : %d \n", ntohs(dns->ans_count));
	for (i = 0; i < ans_max; i++) {
		printf("Name : %s ", answers[i].name);

		if (ntohs(answers[i].resource->type) == T_A) //IPv4 address
		{
			long *p;
			p = (long*) answers[i].rdata;
			a.sin_addr.s_addr = (*p); //working without ntohl
#if 1       // cov M
			char * s_addr = inet_ntoa(a.sin_addr);
			printf("has IPv4 address : %s", s_addr);
#else
            printf("has IPv4 address : %s", inet_ntoa(a.sin_addr));
#endif
			ret = (unsigned long)a.sin_addr.s_addr;
		}

		if (ntohs(answers[i].resource->type) == 5) {
			//Canonical name for an alias
			printf("has alias name : %s", answers[i].rdata);
		}

		printf("\n");
	}
out:
	close(s);
	return ret;
}


unsigned long gethostbyname_l(char *hostname,char* dev_name) 
{
	int i = 0;
	unsigned long ret = 0;
	char dns_servers[DNS_SERVER_NUM][32] = {0};

	//Get the DNS servers from the resolv.conf file
	char nv_dns[32]	= {0};
	char ip_dns[32]	= {0};
	
    sprintf(nv_dns, "%s_pridns", dev_name);
	sc_cfg_get(nv_dns, ip_dns, sizeof(ip_dns));
	strcpy(dns_servers[0], ip_dns);

	memset(nv_dns,0,sizeof(nv_dns));
	memset(ip_dns,0,sizeof(ip_dns));
	sprintf(nv_dns, "%s_secdns", dev_name);
	sc_cfg_get(nv_dns, ip_dns, sizeof(ip_dns));
	strcpy(dns_servers[1], ip_dns);

	
	//Now get the ip of this hostname , A record
	for(i=0;i<DNS_SERVER_NUM;i++)
	{
		ret = my_gethostbyname(hostname, dev_name , dns_servers[i], T_A);
		if(ret > 0)
			break;
	}
 
	return ret;
}




/******************************************************************************/