kerneltest/e32test/misc/ymodem.cpp
changeset 0 a41df078684a
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-1:000000000000 0:a41df078684a
       
     1 // Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
       
     2 // All rights reserved.
       
     3 // This component and the accompanying materials are made available
       
     4 // under the terms of the License "Eclipse Public License v1.0"
       
     5 // which accompanies this distribution, and is available
       
     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
     7 //
       
     8 // Initial Contributors:
       
     9 // Nokia Corporation - initial contribution.
       
    10 //
       
    11 // Contributors:
       
    12 //
       
    13 // Description:
       
    14 // e32test\misc\ymodem.cpp
       
    15 // 
       
    16 //
       
    17 
       
    18 #include <e32cmn.h>
       
    19 #include <e32cmn_private.h>
       
    20 #include "ymodem.h"
       
    21 
       
    22 //#include <e32test.h>
       
    23 //GLREF_D RTest test;
       
    24 
       
    25 const TInt KMaxRetries=10;
       
    26 
       
    27 static const TUint16 crcTab[256] =
       
    28     {
       
    29 	0x0000,0x1021,0x2042,0x3063,0x4084,0x50a5,0x60c6,0x70e7,0x8108,0x9129,0xa14a,
       
    30 	0xb16b,0xc18c,0xd1ad,0xe1ce,0xf1ef,0x1231,0x0210,0x3273,0x2252,0x52b5,0x4294,
       
    31 	0x72f7,0x62d6,0x9339,0x8318,0xb37b,0xa35a,0xd3bd,0xc39c,0xf3ff,0xe3de,0x2462,
       
    32 	0x3443,0x0420,0x1401,0x64e6,0x74c7,0x44a4,0x5485,0xa56a,0xb54b,0x8528,0x9509,
       
    33 	0xe5ee,0xf5cf,0xc5ac,0xd58d,0x3653,0x2672,0x1611,0x0630,0x76d7,0x66f6,0x5695,
       
    34 	0x46b4,0xb75b,0xa77a,0x9719,0x8738,0xf7df,0xe7fe,0xd79d,0xc7bc,0x48c4,0x58e5,
       
    35 	0x6886,0x78a7,0x0840,0x1861,0x2802,0x3823,0xc9cc,0xd9ed,0xe98e,0xf9af,0x8948,
       
    36 	0x9969,0xa90a,0xb92b,0x5af5,0x4ad4,0x7ab7,0x6a96,0x1a71,0x0a50,0x3a33,0x2a12,
       
    37 	0xdbfd,0xcbdc,0xfbbf,0xeb9e,0x9b79,0x8b58,0xbb3b,0xab1a,0x6ca6,0x7c87,0x4ce4,
       
    38 	0x5cc5,0x2c22,0x3c03,0x0c60,0x1c41,0xedae,0xfd8f,0xcdec,0xddcd,0xad2a,0xbd0b,
       
    39 	0x8d68,0x9d49,0x7e97,0x6eb6,0x5ed5,0x4ef4,0x3e13,0x2e32,0x1e51,0x0e70,0xff9f,
       
    40 	0xefbe,0xdfdd,0xcffc,0xbf1b,0xaf3a,0x9f59,0x8f78,0x9188,0x81a9,0xb1ca,0xa1eb,
       
    41 	0xd10c,0xc12d,0xf14e,0xe16f,0x1080,0x00a1,0x30c2,0x20e3,0x5004,0x4025,0x7046,
       
    42 	0x6067,0x83b9,0x9398,0xa3fb,0xb3da,0xc33d,0xd31c,0xe37f,0xf35e,0x02b1,0x1290,
       
    43 	0x22f3,0x32d2,0x4235,0x5214,0x6277,0x7256,0xb5ea,0xa5cb,0x95a8,0x8589,0xf56e,
       
    44 	0xe54f,0xd52c,0xc50d,0x34e2,0x24c3,0x14a0,0x0481,0x7466,0x6447,0x5424,0x4405,
       
    45 	0xa7db,0xb7fa,0x8799,0x97b8,0xe75f,0xf77e,0xc71d,0xd73c,0x26d3,0x36f2,0x0691,
       
    46 	0x16b0,0x6657,0x7676,0x4615,0x5634,0xd94c,0xc96d,0xf90e,0xe92f,0x99c8,0x89e9,
       
    47 	0xb98a,0xa9ab,0x5844,0x4865,0x7806,0x6827,0x18c0,0x08e1,0x3882,0x28a3,0xcb7d,
       
    48 	0xdb5c,0xeb3f,0xfb1e,0x8bf9,0x9bd8,0xabbb,0xbb9a,0x4a75,0x5a54,0x6a37,0x7a16,
       
    49 	0x0af1,0x1ad0,0x2ab3,0x3a92,0xfd2e,0xed0f,0xdd6c,0xcd4d,0xbdaa,0xad8b,0x9de8,
       
    50 	0x8dc9,0x7c26,0x6c07,0x5c64,0x4c45,0x3ca2,0x2c83,0x1ce0,0x0cc1,0xef1f,0xff3e,
       
    51 	0xcf5d,0xdf7c,0xaf9b,0xbfba,0x8fd9,0x9ff8,0x6e17,0x7e36,0x4e55,0x5e74,0x2e93,
       
    52 	0x3eb2,0x0ed1,0x1ef0
       
    53     };
       
    54 
       
    55 YModem::YModem(TBool aG)
       
    56 	{
       
    57 	iTimeout=2000000;
       
    58 	iPacketSize=0;
       
    59 	iInitChar=aG?BIGG:BIGC;
       
    60 	}
       
    61 
       
    62 void YModem::UpdateCrc(const TUint8* aPtr, TInt aLength)
       
    63 //
       
    64 // Perform a CCITT CRC checksum.
       
    65 //
       
    66 	{
       
    67 
       
    68 	register const TUint8* pB=aPtr;
       
    69 	register TUint16 crc=iCrc;
       
    70     while (aLength--)
       
    71 		crc=TUint16((crc<<8)^crcTab[(crc>>8)^*pB++]);
       
    72 	iCrc=crc;
       
    73 	}
       
    74 
       
    75 TInt YModem::ReadPacket(TDes8& aDest)
       
    76 	{
       
    77 	TUint8* pD = (TUint8*)aDest.Ptr();
       
    78 	TInt r;
       
    79 	TPtr8 d(pD, 0, 1);
       
    80 	r = ReadBlock(d);
       
    81 	if (r != KErrNone)
       
    82 		return r;
       
    83 	if (d.Length()==0)
       
    84 		return KErrZeroLengthPacket;
       
    85 	TUint8 b0 = *pD;
       
    86 	if (b0==CAN)
       
    87 		return KErrAbort;
       
    88 	if (b0==EOT)
       
    89 		return KErrEof;
       
    90 	if (b0==SOH)
       
    91 		iBlockSize=128;
       
    92 	else if (b0==STX)
       
    93 		iBlockSize=1024;
       
    94 	else
       
    95 		return KErrBadPacketType;
       
    96 	iTimeout=5000000;
       
    97 	iPacketSize = iBlockSize+5;
       
    98 	d.Set(pD+1, 0, iPacketSize-1);
       
    99 	r = ReadBlock(d);
       
   100 	if (r!=KErrNone && r!=KErrTimedOut)
       
   101 		return r;
       
   102 	if (d.Length() < iPacketSize-1)
       
   103 		return KErrPacketTooShort;
       
   104 	TUint8 seq = pD[1];
       
   105 	TUint8 seqbar = pD[2];
       
   106 	seqbar^=seq;
       
   107 	if (seqbar != 0xff)
       
   108 		return KErrCorruptSequenceNumber;
       
   109 	if (seq==iSeqNum)
       
   110 		return KErrAlreadyExists;
       
   111 	else
       
   112 		{
       
   113 		TUint8 nextseq=(TUint8)(iSeqNum+1);
       
   114 		if (seq!=nextseq)
       
   115 			return KErrWrongSequenceNumber;
       
   116 		}
       
   117 	iCrc=0;
       
   118 	UpdateCrc(pD+3, iBlockSize);
       
   119 	aDest.SetLength(iPacketSize);
       
   120 	TUint16 rx_crc = (TUint16)((pD[iPacketSize-2]<<8) | pD[iPacketSize-1]);
       
   121 	if (rx_crc != iCrc)
       
   122 		return KErrBadCrc;
       
   123 	++iSeqNum;
       
   124 	return KErrNone;
       
   125 	}
       
   126 
       
   127 TInt YModem::CheckPacket(TUint8* aDest)
       
   128 	{
       
   129 	const TUint8* p=iPacketBuf.Ptr()+3;
       
   130 	if (iState>0)
       
   131 		memcpy(aDest, p, iBlockSize);
       
   132 	else
       
   133 		{
       
   134 		// parse packet 0
       
   135 		TPtrC8 nameptr(p);
       
   136 		TInt nLen=nameptr.Length();
       
   137 		if (nLen==0)
       
   138 			return KErrSessionClosed;		// batch termination packet
       
   139 		iFileName.Copy(nameptr.Left(Min(nLen,iFileName.MaxLength())));
       
   140 		p+=nLen+1;
       
   141 		iFileSize=0;
       
   142 		for (;;)
       
   143 			{
       
   144 			TUint c=*p++;
       
   145 			if (c<'0' || c>'9')
       
   146 				break;
       
   147 			iFileSize*=10;
       
   148 			iFileSize+=c-'0';
       
   149 			}
       
   150 //		test.Printf(_L("File %S, size %d\n"),&iFileName,iFileSize);
       
   151 		}
       
   152 	return KErrNone;
       
   153 	}
       
   154 
       
   155 TInt YModem::ReadPackets(TUint8*& aDest, TInt aLength)
       
   156 	{
       
   157 	TInt l=0;
       
   158 	TInt r=KErrNone;
       
   159 	while(l<aLength || iState==0)
       
   160 		{
       
   161 		TInt retries=0;
       
   162 		for(retries=0; retries<KMaxRetries; retries++)
       
   163 			{
       
   164 			if (iState==0)
       
   165 				iTimeout=2000000, WriteC(iInitChar);
       
   166 			r=ReadPacket(iPacketBuf);
       
   167 //			test.Printf(_L("%d\n"),r);
       
   168 			if (r==KErrTimedOut)
       
   169 				continue;
       
   170 			if (r==KErrNone)
       
   171 				r=CheckPacket(aDest);
       
   172 			if (r==KErrEof || r==KErrSessionClosed)
       
   173 				break;
       
   174 			if (r==KErrNone || r==KErrAlreadyExists)
       
   175 				{
       
   176 				if (r==KErrNone)
       
   177 					iState++;
       
   178 				if (iState>1)
       
   179 					aDest+=iBlockSize;		// don't store packet 0
       
   180 				if (iInitChar==BIGC)
       
   181 					WriteC(ACK);
       
   182 				if (iState==1)
       
   183 					WriteC(iInitChar);		// Send another 'C' after ACK
       
   184 				if (r==KErrAlreadyExists)
       
   185 					continue;
       
   186 				break;
       
   187 				}
       
   188 			if (r==KErrAbort)
       
   189 				break;
       
   190 			if (iInitChar==BIGG)
       
   191 				break;
       
   192 			WriteC(NAK);
       
   193 			}
       
   194 		if (r==KErrNone)
       
   195 			{
       
   196 			if (iState>1)
       
   197 				l+=iBlockSize;
       
   198 			}
       
   199 		else if (r==KErrSessionClosed)
       
   200 			{
       
   201 			if (iInitChar==BIGC)
       
   202 				WriteC(ACK);
       
   203 			break;
       
   204 			}
       
   205 		else if (r==KErrEof)
       
   206 			{
       
   207 			WriteC(ACK);					// acknowledge end
       
   208 			break;
       
   209 			}
       
   210 		else if (r!=KErrAbort)
       
   211 			{
       
   212 			WriteC(CAN);
       
   213 			WriteC(CAN);
       
   214 			WriteC(CAN);
       
   215 			WriteC(CAN);
       
   216 			WriteC(CAN);
       
   217 			break;
       
   218 			}
       
   219 		}
       
   220 	return r;
       
   221 	}
       
   222 
       
   223 TInt YModem::StartDownload(TBool aG, TInt& aLength, TDes& aName)
       
   224 	{
       
   225 	TInt r;
       
   226 	iInitChar=aG?BIGG:BIGC;
       
   227 	iState=0;
       
   228 	iSeqNum=255;
       
   229 	TUint8* dummy=NULL;
       
   230 	r=ReadPackets(dummy, 0);			// read the file description packet
       
   231 	if (r==KErrNone)
       
   232 		{
       
   233 		aLength=iFileSize;				// return file name and file size
       
   234 		aName=iFileName;
       
   235 		}
       
   236 	return r;
       
   237 	}
       
   238