/********************************************************************************
 * File Name:						ModemTcpComm.c
 * Function Describe:  通过TCP与服务器通信(TCP通信协议)
 * Explain:  
 * Writer:			
 * Date:				
 *******************************************************************************/
 #define THIS_FILE_ID 8
/*******************************************************************************/
#include "includes.h" 
//-------------------------------------------------------------------------------
SUT_TCP_STATUS sutTcpStatus;

SUT_LOGIN_ACK sutLoginAck={0,0,0,0,0,0,0,0,0};
SUT_FOTA_PARA sutFotaPara; 

//UploadCode和UploadCodeAck 用于确保本地待上传的数据与服务器数据一致性
//本地数据发生变化，需要上传时，将UploadCode加1并确保UploadCode！=UploadCodeAck
//服务器收到后原值回传，本地收到服务器回复后覆盖UploadCodeAck
//当检查到UploadCode！=UploadCodeAck时，将触发上传
unsigned char g_ucUploadCode=0;		//上传标志码，每次上传前先自动加1
unsigned char g_ucUploadCodeAck=128;//上传标志码服务器回传码

static void IapGetUpdateData(uint32_t offset,uint16_t len);
static char IapCheckFileMD5_SPI_Flash(unsigned int dataAddr,unsigned int length,uint8_t *MD5);
//==============================================================================
//@Functions  
//@brief  将32位大小端数据格式转换
//@param   
//@retval 转换后的数据
//============================================================================== 
unsigned int BigLittle32Conv(unsigned int srcData)
{
    SUTDL dl1, dl2;//用于大小端转换
    dl1.Data.ulData = srcData;
    dl2.Data.ucData.b1 = dl1.Data.ucData.b4;
    dl2.Data.ucData.b2 = dl1.Data.ucData.b3;
    dl2.Data.ucData.b3 = dl1.Data.ucData.b2;
    dl2.Data.ucData.b4 = dl1.Data.ucData.b1;
    return dl2.Data.ulData;    
}

//==============================================================================
//@Functions  
//@brief  将16位大小端数据格式转换
//@param   
//@retval 转换后的数据
//============================================================================== 
unsigned short BigLittle16Conv(unsigned short srcData)
{
    SUTDS ds1, ds2;//用于大小端转换
    ds1.Data.usData = srcData;
    ds2.Data.ucData.b1 = ds1.Data.ucData.b2;
    ds2.Data.ucData.b2 = ds1.Data.ucData.b1;
    return ds2.Data.usData;
}

//==============================================================================
//@Functions  
//@brief  从pStr中找到pSearch,返回pSearch后的第一个地址(若无para则返回0)。可配合 StrNumToInt() 使用
//举例：pStr=" "WorkEnable":1,"PowerOnTimeAdj":[123,45,-78,90], "    
//	如果pSearch="TimeAdj":[" 返回"123,45,-78,90], "
//	如果pSearch="Work":"	返回"Enable":1,"PowerOnTimeAdj":[123,45,-78,90], "
//	如果pSearch="abcd":"	返回NULL
//@param  
//@retval pSearch后的第一个地址
//============================================================================== 
char* SearchFromStr(char *pStr,char *pSearch)
{
    char *pResult;
    unsigned char searchLen;
    pResult = strstr(pStr, pSearch);
    if(pResult == NULL)
    {
        return NULL;
    }
    searchLen = strlen(pSearch);
    pResult += searchLen;
    return pResult;   
}

//==============================================================================
//@Functions  
//@brief  指定位置开始，到非数字字符结束的数字字符串转换成整形数值(数值范围-2147483648~2147483647)
//        "65535,a" --> 65535(十六进制0xFFFF),返回5
//        "-123"    --> -123(十六进制0x85),返回4
//        " -123"    --> -123(十六进制0x85),返回5
//        "123456789,kk"--> 123456789,返回9
//@param   输入:  *pStrNum   字符串数字开始的指针
//         输出   *pNum      转换的值
//@retval  转换的字符串中数字长度(含"-"号和空格),0失败
//============================================================================== 
static unsigned char StrNumToInt(int *pNum, char *pStrNum)
{
	char i, numLen = 0;
	char buf[11] = {0};
	for(i = 0; i < 10; i++)
    {
		if(pStrNum[i]>0x39 || pStrNum[i]<0x30)
        {
            if(pStrNum[i] != ' ' && pStrNum[i] != '-') break;         
		}
		buf[i] = pStrNum[i];
        numLen = i + 1;
	}
	buf[i] = 0;
    *pNum = atoi(buf);
	return numLen;
}

//==============================================================================
//@Functions  
//@brief  获取 指定位置开始，到"结束的 字符串内容，并返回实际长度，若无",则获取最大长度
//        17010001" --> 17010001(ASCII),返回8
//
//@param   输入:  *pStr   字符串开始的指针   maxLen
//         输出   *pAsc      转换的值
//@retval  转换的字符串长度
//============================================================================== 
static unsigned char StrToAsc(char *pAsc, char *pStr, unsigned char maxLen)
{
	char i, numLen = 0; 
	for(i = 0; i < maxLen; i++)
    {
		if(pStr[i] == '\"') break;//到"结束
		pAsc[i] = pStr[i];
        numLen = i + 1;
	}
	pAsc[i] = 0;
	return numLen;
}


/********************************************************************************
Packing
打包函数
按数据包格式将pdata的数据打包到pTcpBuf中
格式：
 |Head|Cmd|Length(2)| DATA(n)| Check |
  Length 是从DATA...到Check的数据长度（包含了Check）即Length=n+1
返回包长 包长应等于Length+4  也等于n+5
 *********************************************************************************/
unsigned short TcpPacking(unsigned char *pBuf,unsigned char cmd,unsigned short datalen,unsigned char *pdata)
{
	unsigned char i;
	unsigned char check=0;
	unsigned short len;
	if(datalen>(TCP_SEND_BUF_LEN-6))return 0;
	pBuf[0]=TCP_PACKET_HEAD;
	check=TCP_PACKET_HEAD;
	pBuf[1]=cmd;
	check^=cmd;
	len=datalen+1;
	pBuf[2]=(unsigned char)((len>>8)&0xff);
	check^=pBuf[2];
	pBuf[3]=(unsigned char)(len&0xff);
	check^=pBuf[3];
	for(i=0;i<datalen;i++){
		pBuf[4+i]=pdata[i];
		check^=pdata[i];
	}
	pBuf[datalen+4]=check;
	return len+4;
}

SUT_LOGIN sutLoginInfo;//size=56bytes
/*********************************************************************************
PackingReg
	打包成注册信息包，存放在pBuf中
//登陆服务器的数据结构
*********************************************************************************/
unsigned short TcpPackingReg(unsigned char *pBuf)
{

	unsigned short len;
	SUTDS ds;
	SUTDL dl;
	unsigned char data[sizeof(SUT_LOGIN)];
	if(sizeof(SUT_LOGIN)>sizeof(data))return 0;
	if(sutProductPara.PSN==0 || 0==CheckAKey())return 0;//AKEY无效 不允许登陆
	sutLoginInfo.ASN=sutProductPara.PSN;
	sutLoginInfo.AKEY=sutProductPara.AKEY;
	memcpy(sutLoginInfo.CCID,sutModemStatus.CCID,20);
	memcpy(sutLoginInfo.Model,sutProductPara.ProductName,sizeof(sutLoginInfo.Model));
	sutLoginInfo.Ver=sutProductPara.SoftwareVer;
	sutLoginInfo.Rand=sutModemStatus.CSQ;
	memcpy(data,&sutLoginInfo,sizeof(SUT_LOGIN));
	ds.Data.usData=sutLoginInfo.Ver;
	data[8]=ds.Data.ucData.b2;
	data[9]=ds.Data.ucData.b1;
	
	dl.Data.ulData=sutLoginInfo.ASN;
	data[12]=dl.Data.ucData.b4;
	data[13]=dl.Data.ucData.b3;
	data[14]=dl.Data.ucData.b2;
	data[15]=dl.Data.ucData.b1;
	
	dl.Data.ulData=sutLoginInfo.AKEY;
	data[16]=dl.Data.ucData.b4;
	data[17]=dl.Data.ucData.b3;
	data[18]=dl.Data.ucData.b2;
	data[19]=dl.Data.ucData.b1;
	
	return TcpPacking(pBuf,CMD_LOGIN,sizeof(SUT_LOGIN),data);
}
/*********************************************************************************
PackingSendTest
	打包成SendTick信息包，存放在pBuf中
*********************************************************************************/
unsigned short TcpPackingSendTick(unsigned char *pBuf)
{
//	unsigned char *pTemp;
//	unsigned short i,j,k;
//	unsigned char check=0;
//	unsigned short len;
//	//unsigned short datalen=sutTestData.TcLen+24;
//	if(datalen>(TCP_SEND_BUF_LEN-6))return 0;
//	j=0;
//	pBuf[j++]=TCP_PACKET_HEAD;
//	check=TCP_PACKET_HEAD;
//	pBuf[j++]=CMD_SEND_TEST;
//	len=datalen+1;
//	pBuf[j++]=(unsigned char)((len>>8)&0xff);
//	pBuf[j++]=(unsigned char)(len&0xff);
//	pBuf[j++]=sutTestData.NetMode;
//	pBuf[j++]=sutTestData.CSQ;
//	pBuf[j++]=(unsigned char )((sutTestData.GpsNum>>8)&0xff);
//	pBuf[j++]=(unsigned char)(sutTestData.GpsNum&0xff);
//	pBuf[j++]=(unsigned char )((sutTestData.BDNum>>8)&0xff);
//	pBuf[j++]=(unsigned char)(sutTestData.BDNum&0xff);
//	
//	pTemp=(unsigned char *)&sutTestData.Longitude;
//	for(i=8;i>0;i--){
//		pBuf[j++]=pTemp[i-1];
//	}
//	pTemp=(unsigned char *)&sutTestData.Latitude;
//	for(i=8;i>0;i--){
//		pBuf[j++]=pTemp[i-1];
//	}
//	pBuf[j++]=(unsigned char )((sutTestData.Speed>>8)&0xff);
//	pBuf[j++]=(unsigned char)(sutTestData.Speed&0xff);
//	pBuf[j++]=(unsigned char )((sutTestData.Aspect>>8)&0xff);
//	pBuf[j++]=(unsigned char)(sutTestData.Aspect&0xff);
//	
//	
//	for(i=0;i<sutTestData.TcLen;i++){
//		pBuf[i+j]=sutTestData.TcData[i];
//	}
//	j+=sutTestData.TcLen;
//	
//	//check
//	check=0;
//	for(i=0;i<j;i++){
//		check^=pBuf[i];
//	}
//	pBuf[j++]=check;
//	return j;
}
/*********************************************************************************
PackingSendTest
	打包成SendTest信息包，存放在pBuf中
入口参数：sutTestData
出口参数：pBuf
 数据内容：
	TestCode,NetMode,CSQ ,GpsNum,BDNum, Longitude, Latitude, Speed, Aspect, DATA
*********************************************************************************/
unsigned short TcpPackingSendTest(unsigned char *pBuf)
{
//	unsigned char *pTemp;
//	unsigned short i,j,k;
//	unsigned char check=0;
//	unsigned short len;
//	unsigned short datalen=25;//+sutTestData.TcLen;
//	if(datalen>(TCP_SEND_BUF_LEN-6))return 0;
//	j=0;
//	pBuf[j++]=TCP_PACKET_HEAD;
//	check=TCP_PACKET_HEAD;
//	pBuf[j++]=CMD_SEND_TEST;
//	len=datalen+1;
//	pBuf[j++]=(unsigned char)((len>>8)&0xff);
//	pBuf[j++]=(unsigned char)(len&0xff);
//	pBuf[j++]=g_ucUploadCode;
//	pBuf[j++]=sutTestData.NetMode;
//	pBuf[j++]=sutTestData.CSQ;
//	pBuf[j++]=sutTestData.GpsNum;
//	pBuf[j++]=sutTestData.BDNum;
//	
//	
//	pTemp=(unsigned char *)&sutTestData.Longitude;
//	for(i=8;i>0;i--){
//		pBuf[j++]=pTemp[i-1];
//	}
//	pTemp=(unsigned char *)&sutTestData.Latitude;
//	for(i=8;i>0;i--){
//		pBuf[j++]=pTemp[i-1];
//	}
//	pBuf[j++]=(unsigned char )((sutTestData.Speed>>8)&0xff);
//	pBuf[j++]=(unsigned char)(sutTestData.Speed&0xff);
//	pBuf[j++]=(unsigned char )((sutTestData.Aspect>>8)&0xff);
//	pBuf[j++]=(unsigned char)(sutTestData.Aspect&0xff);
//	
//	
//	for(i=0;i<sutTestData.TcLen;i++){
//		pBuf[i+j]=sutTestData.TcData[i];
//	}
//	j+=sutTestData.TcLen;
//	
//	//check
//	check=0;
//	for(i=0;i<j;i++){
//		check^=pBuf[i];
//	}
//	pBuf[j++]=check;
//	return j;
}



/*
收到服务器发来的TCP数据包
|Head(1)|Cmd(1)|Len(2)|...|check(1)|
*/
void TcpRecvData(unsigned char *pData,unsigned short DataLen)
{
	char buf[50];
	unsigned char cmd;
	unsigned short Len;
	unsigned char check;
	int i;
	//trace recv data
	//Debugsend(pData,DataLen);
	//
	
	if(DataLen<5 || pData[0]!=0xAB){
		SlwTrace(DEBUG,"TcpRecvData error!\r\n");
		return;
	}
	Len=(((unsigned short)pData[2])<<8)+(unsigned short)pData[3];
	if(Len+4!=DataLen){
		SlwTrace(DEBUG,"TcpRecvData len error!\r\n");
		return;
	}
	check=0;
	for(i=0;i<(DataLen-1);i++){
		check^=pData[i];
	}
	if(check!=pData[DataLen-1]){
		SlwTrace(DEBUG,"TcpRecvData check error!\r\n");
		return;
	}
	//-----------
	cmd=pData[1];
	//snprintf(buf,sizeof(buf),"Recv cmd=%02X len=%d\r\n",cmd,DataLen);
	//SlwTrace(DEBUG,buf);
	switch(cmd){
		case CMD_LOGIN_ACK:
			//Head(1) Cmd(1) Len(2) NowTime(6) Interval(2) GNSSEnable(1) NetMode(1) NewVer(2) NewIP(4) NewPort(2) check(1)
			//Now Time=pData[4]~pData[[9]
			//Interval
			sutLoginAck.Interval=(unsigned short)pData[10];
			sutLoginAck.Interval<<=8;
			sutLoginAck.Interval+=(unsigned short)pData[11];
			if(sutLoginAck.Interval<10)sutLoginAck.Interval=10;
			sutLoginAck.GNSSEnable=pData[12];
			sutLoginAck.NetMode=pData[13];
			sutLoginAck.NewVer=(unsigned short)pData[14];
			sutLoginAck.NewVer<<=8;
			sutLoginAck.NewVer+=(unsigned short)pData[15];
			sutLoginAck.NewIP[0]=pData[16];
			sutLoginAck.NewIP[1]=pData[17];
			sutLoginAck.NewIP[2]=pData[18];
			sutLoginAck.NewIP[3]=pData[19];
			sutLoginAck.NewPort=(unsigned short)pData[20];
			sutLoginAck.NewPort<<=8;
			sutLoginAck.NewPort+=(unsigned short)pData[21];
			sprintf(buf,"I=%d GE=%d NM=%d NV=%d\r\n",\
				sutLoginAck.Interval,sutLoginAck.GNSSEnable,sutLoginAck.NetMode,sutLoginAck.NewVer);
			SlwTrace(DEBUG,buf);
			sprintf(buf,"NewH=%d.%d.%d.%d:%d\r\n",\
				sutLoginAck.NewIP[0],sutLoginAck.NewIP[1],sutLoginAck.NewIP[2],sutLoginAck.NewIP[3],sutLoginAck.NewPort);
			SlwTrace(DEBUG,buf);
			if(sutLoginAck.NewVer!=sutProductPara.SoftwareVer && sutLoginAck.NewVer!=0){
				sutTcpStatus.FoTa=OPENED;
				sutFotaPara.fotaStatus=FOTA_GET_FILEINFO;
				sutTcpStatus.ServerStatus=CLOSED;
				ModemCloseSocket(0);
			}else{
				sutTcpStatus.ServerStatus=OPENED;
			}
			break;
		case CMD_SEND_TEST_ACK:
			g_ucUploadCodeAck=pData[4];
			//sprintf(buf,"UploadCodeAck=%02X\r\n",g_ucUploadCodeAck);
			//SlwTrace(DEBUG,buf);
			break;
		case CMD_CONTROL:
			SlwTrace(DEBUG,"SCMD_SET_CTRL<<\r\n");
			break;
		case CMD_GET_FILE_INFO_ACK:
			SlwTrace(DEBUG,"CMD_GET_FILE_INFO_ACK<<\r\n");
			SUT_FILE_INFO *pFileInfo; 
			unsigned short i,realDataLen,thisLen;
			SUTDS ds;
			SUTDL dl1;
			SUTDL dl2;
			char info[30];
			pFileInfo=(SUT_FILE_INFO *)&pData[4];
		  snprintf(info,sizeof(info), "%s_V%d.bin", sutProductPara.ProductName,sutLoginAck.NewVer);
		  if(0!=strcmp(pFileInfo->FileName, info))
			{//文件名和版本号不对，结束升级
				SlwTrace(DEBUG, "FNameErr\r\n");
				sutLoginAck.NewVer=0;//结束升级
				sutTcpStatus.ServerStatus=CLOSED;
				sutFotaPara.fotaStatus=FOTA_END;
				return;
			}
			dl1.Data.ulData=pFileInfo->FileLength;
			dl2.Data.ucData.b1=dl1.Data.ucData.b4;
			dl2.Data.ucData.b2=dl1.Data.ucData.b3;
			dl2.Data.ucData.b3=dl1.Data.ucData.b2;
			dl2.Data.ucData.b4=dl1.Data.ucData.b1;
			sutFotaPara.fileLength=dl2.Data.ulData;
			sutFotaPara.encrypted=pFileInfo->encrypted;
			sutFotaPara.key=pFileInfo->key;
			memcpy(sutFotaPara.MD5,pFileInfo->MD5,16);
			if(sutFotaPara.fileLength==0)
			{//服务器没有文件,退出升级
				SlwTrace(DEBUG, "NoFileInServer");
				sutLoginAck.NewVer=0;//结束升级
				sutTcpStatus.ServerStatus=CLOSED;
				sutFotaPara.fotaStatus=FOTA_END;
				
				return;
			}
			sutFotaPara.lastOffset=-1;
			sutFotaPara.nextOffset=0;
			sutFotaPara.tcpCnt=0;
			sutFotaPara.fotaStatus=FOTA_GET_FILEDATA;
			sutTcpStatus.FoTa=OPENED;
			sutTcpStatus.ServerStatus=OPENED;
			break;
		case CMD_GET_FILE_DATA_ACK:
			SlwTrace(DEBUG,"CMD_GET_FILE_DATA_ACK<<\r\n");
			unsigned int thisOffset;
			//offset
			dl1.Data.ucData.b4=pData[4];
		  dl1.Data.ucData.b3=pData[5];
		  dl1.Data.ucData.b2=pData[6];
		  dl1.Data.ucData.b1=pData[7];
		  thisOffset=dl1.Data.ulData;
		  //lenght
		  ds.Data.ucData.b2=pData[8];
		  ds.Data.ucData.b1=pData[9];
		  thisLen=ds.Data.usData;
		  //save
		  SPI_Flash_Write(pData+10,APP_FILE_DATA_ADDR+thisOffset,thisLen);
		  //done?
		  if((thisOffset+thisLen) >= sutFotaPara.fileLength)
			{
				snprintf(info,sizeof(info), "\r\nHBD=%d\r\nLoad done\r\n",sutFotaPara.fileLength);
				SlwTrace(DEBUG, info);
				//校验
				if(0!=IapCheckFileMD5_SPI_Flash(APP_FILE_DATA_ADDR, sutFotaPara.fileLength, sutFotaPara.MD5))
				{//较验成功,准备跳转到IAP前准备
					memcpy(sutDeviceConfig.MD5, sutFotaPara.MD5,sizeof(sutDeviceConfig.MD5));
					sutDeviceConfig.AppExAddr=APP_FILE_DATA_ADDR;
					sutDeviceConfig.AppLen=sutFotaPara.fileLength;
					sutDeviceConfig.FoTaMark[0]='F';sutDeviceConfig.FoTaMark[1]='o';sutDeviceConfig.FoTaMark[2]='T';sutDeviceConfig.FoTaMark[3]='a';
					SaveDeviceConfigToFlash();
					SlwTrace(DEBUG, "GoingUpdate\r\n");
					//系统复位
					SystemReset();
				}else{
					SlwTrace(INF, "Md5Err");
					//重新升级
					sutFotaPara.fotaStatus=FOTA_GET_FILEINFO;
					sutTcpStatus.ServerStatus=CLOSED;
				}
			}else{
				sutFotaPara.tcpCnt=0;
				sutFotaPara.lastOffset=sutFotaPara.nextOffset;
				sutFotaPara.nextOffset=thisOffset+thisLen;
				snprintf(info,sizeof(info), "\r\nHBD=%d\r\n",sutFotaPara.lastOffset);
				SlwTrace(DEBUG, info);
			}
			break;
		case CMD_LOGIN_REJECT://鉴权失败，拒绝登陆
			sutTcpStatus.LoginWaitTime=(unsigned short)pData[4]&0xff;
			if(sutTcpStatus.LoginWaitTime==0)sutTcpStatus.LoginWaitTime=3600;//1小时
			else sutTcpStatus.LoginWaitTime*=60;
			break;
	}
}



/*******************************************************************
封包，获取新版本
 |Head|Cmd|length(2) | data... | Check|
 Head 包头，固定为0xAB
 Cmd 命令字
 length 后续的数据长度，包括到Check的长度    length=1+data.len
 Check 从Head开始按字节异或运算
data:
	unsigned long PSN;  				//终端编号
	unsigned char FileName[20];	//文件名  如:RT101_V102.bin
	unsigned long offset;				//请求数据在文件中的开始位置
	unsigned short len;					//请求数据的长度，服务器返回的数据可能小于等于此长度
*******************************************************************/
unsigned short PacketGetFileData(unsigned char *buf,unsigned int offset,unsigned short len)
{
	unsigned char checksum;
	unsigned short i,j;
	char FileName[21];
	SUTDL dl;
	SUTDS ds;
	j=0;
	memset(buf,0,35);
	buf[j++]=TCP_PACKET_HEAD;
	buf[j++]=CMD_GET_FILE_DATA;
	buf[j++]=0;
	buf[j++]=30+1;//数据18字节，1字节checksum
	//PSN  
	dl.Data.ulData=sutProductPara.PSN; //因为协议要求大端模式传输，所以需要转一下
	buf[j++]=dl.Data.ucData.b4;
	buf[j++]=dl.Data.ucData.b3;
	buf[j++]=dl.Data.ucData.b2;
	buf[j++]=dl.Data.ucData.b1;
	//FileName
	snprintf(FileName,sizeof(FileName), "%s_V%d.bin", sutProductPara.ProductName,sutLoginAck.NewVer);
	for(i=0;i<20;i++){
		buf[j++]=FileName[i];
	}
	//offset
	dl.Data.ulData=offset; //因为协议要求大端模式传输，所以需要转一下
	buf[j++]=dl.Data.ucData.b4;
	buf[j++]=dl.Data.ucData.b3;
	buf[j++]=dl.Data.ucData.b2;
	buf[j++]=dl.Data.ucData.b1;
	//len
	ds.Data.usData=len;
	buf[j++]=ds.Data.ucData.b2;
	buf[j++]=ds.Data.ucData.b1;
	//校验
	checksum=0;
	for(i=0;i<j;i++){
		checksum=checksum^buf[i];
	}
	buf[j++]=checksum;
	return j;
}
/*

*/
void FoTaGetFileData(void)
{
	unsigned short subLen;
	unsigned char txbuf[35];

	subLen=PacketGetFileData(txbuf,sutFotaPara.nextOffset,1024);
	ModemSendToSocket(0,txbuf,subLen);
}


/////////////////////////////////////////////////////////////////
/*******************************************************************
封包，获取新版本文件信息
 |Head|Cmd|length(2) | data... | Check|
 Head 包头，固定为0xAB
 Cmd 命令字
 length 后续的数据长度，包括到Check的长度    length=1+data.len
 Check 从Head开始按字节异或运算

data：
	unsigned long PSN;//终端编号
	char FileName[20];//文件名，不够的在末尾补0
总长 24+5=29 bytes
*******************************************************************/
unsigned short PacketGetFileInfo(unsigned char *buf)
{
	unsigned char checksum;
	unsigned short i,j,k;
	char FileName[21];
	
	SUTDL dl;
	SUTDS ds;
	j=0;
	memset(buf,0,29);
	buf[j++]=TCP_PACKET_HEAD;
	buf[j++]=CMD_GET_FILE_INFO;
	buf[j++]=0;
	buf[j++]=24+1;//数据24字节，1字节checksum
	//PSN  
	dl.Data.ulData=sutProductPara.PSN; //因为协议要求大端模式传输，所以需要转一下
	buf[j++]=dl.Data.ucData.b4;
	buf[j++]=dl.Data.ucData.b3;
	buf[j++]=dl.Data.ucData.b2;
	buf[j++]=dl.Data.ucData.b1;
	//FileName	
	snprintf(FileName,sizeof(FileName), "%s_V%d.bin", sutProductPara.ProductName,sutLoginAck.NewVer);
	for(i=0;i<20;i++){
		buf[j++]=FileName[i];
	}
	//校验
	checksum=0;
	for(i=0;i<j;i++){
		checksum=checksum^buf[i];
	}
	buf[j++]=checksum;
	return j;
}


static char IapCheckFileMD5_SPI_Flash(unsigned int dataAddr,unsigned int length,uint8_t *MD5)
{
	MD5_CTX mdContext;
	unsigned char data[1024];
	unsigned long len,l;
	char tembuf[5];
	int i;

	MD5Init(&mdContext);
	len=0;
	while(len<length)
	{
		if((length-len)>1024)l=1024;
		else l=length-len;
		SPI_Flash_Read(data,dataAddr+len,l);
		MD5Update(&mdContext,data,l);
		len+=l;
	}
	MD5Final(&mdContext);
	//check
	for(i=0;i<16;i++){
		if(MD5[i]!=mdContext.digest[i])break;
	}
	if(i<16)return 0;
	else return 1;
}

void TcpCommInit(void)
{
	memset(&sutTcpStatus,0,sizeof(SUT_TCP_STATUS));
	memset(&sutLoginAck,0,sizeof(SUT_LOGIN_ACK));
	memset(&sutFotaPara,0,sizeof(SUT_FOTA_PARA));
}
/*******************************************************************************/