1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/kernelhwsrv/kerneltest/e32test/misc/ymodem.cpp Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,238 @@
1.4 +// Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
1.5 +// All rights reserved.
1.6 +// This component and the accompanying materials are made available
1.7 +// under the terms of the License "Eclipse Public License v1.0"
1.8 +// which accompanies this distribution, and is available
1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
1.10 +//
1.11 +// Initial Contributors:
1.12 +// Nokia Corporation - initial contribution.
1.13 +//
1.14 +// Contributors:
1.15 +//
1.16 +// Description:
1.17 +// e32test\misc\ymodem.cpp
1.18 +//
1.19 +//
1.20 +
1.21 +#include <e32cmn.h>
1.22 +#include <e32cmn_private.h>
1.23 +#include "ymodem.h"
1.24 +
1.25 +//#include <e32test.h>
1.26 +//GLREF_D RTest test;
1.27 +
1.28 +const TInt KMaxRetries=10;
1.29 +
1.30 +static const TUint16 crcTab[256] =
1.31 + {
1.32 + 0x0000,0x1021,0x2042,0x3063,0x4084,0x50a5,0x60c6,0x70e7,0x8108,0x9129,0xa14a,
1.33 + 0xb16b,0xc18c,0xd1ad,0xe1ce,0xf1ef,0x1231,0x0210,0x3273,0x2252,0x52b5,0x4294,
1.34 + 0x72f7,0x62d6,0x9339,0x8318,0xb37b,0xa35a,0xd3bd,0xc39c,0xf3ff,0xe3de,0x2462,
1.35 + 0x3443,0x0420,0x1401,0x64e6,0x74c7,0x44a4,0x5485,0xa56a,0xb54b,0x8528,0x9509,
1.36 + 0xe5ee,0xf5cf,0xc5ac,0xd58d,0x3653,0x2672,0x1611,0x0630,0x76d7,0x66f6,0x5695,
1.37 + 0x46b4,0xb75b,0xa77a,0x9719,0x8738,0xf7df,0xe7fe,0xd79d,0xc7bc,0x48c4,0x58e5,
1.38 + 0x6886,0x78a7,0x0840,0x1861,0x2802,0x3823,0xc9cc,0xd9ed,0xe98e,0xf9af,0x8948,
1.39 + 0x9969,0xa90a,0xb92b,0x5af5,0x4ad4,0x7ab7,0x6a96,0x1a71,0x0a50,0x3a33,0x2a12,
1.40 + 0xdbfd,0xcbdc,0xfbbf,0xeb9e,0x9b79,0x8b58,0xbb3b,0xab1a,0x6ca6,0x7c87,0x4ce4,
1.41 + 0x5cc5,0x2c22,0x3c03,0x0c60,0x1c41,0xedae,0xfd8f,0xcdec,0xddcd,0xad2a,0xbd0b,
1.42 + 0x8d68,0x9d49,0x7e97,0x6eb6,0x5ed5,0x4ef4,0x3e13,0x2e32,0x1e51,0x0e70,0xff9f,
1.43 + 0xefbe,0xdfdd,0xcffc,0xbf1b,0xaf3a,0x9f59,0x8f78,0x9188,0x81a9,0xb1ca,0xa1eb,
1.44 + 0xd10c,0xc12d,0xf14e,0xe16f,0x1080,0x00a1,0x30c2,0x20e3,0x5004,0x4025,0x7046,
1.45 + 0x6067,0x83b9,0x9398,0xa3fb,0xb3da,0xc33d,0xd31c,0xe37f,0xf35e,0x02b1,0x1290,
1.46 + 0x22f3,0x32d2,0x4235,0x5214,0x6277,0x7256,0xb5ea,0xa5cb,0x95a8,0x8589,0xf56e,
1.47 + 0xe54f,0xd52c,0xc50d,0x34e2,0x24c3,0x14a0,0x0481,0x7466,0x6447,0x5424,0x4405,
1.48 + 0xa7db,0xb7fa,0x8799,0x97b8,0xe75f,0xf77e,0xc71d,0xd73c,0x26d3,0x36f2,0x0691,
1.49 + 0x16b0,0x6657,0x7676,0x4615,0x5634,0xd94c,0xc96d,0xf90e,0xe92f,0x99c8,0x89e9,
1.50 + 0xb98a,0xa9ab,0x5844,0x4865,0x7806,0x6827,0x18c0,0x08e1,0x3882,0x28a3,0xcb7d,
1.51 + 0xdb5c,0xeb3f,0xfb1e,0x8bf9,0x9bd8,0xabbb,0xbb9a,0x4a75,0x5a54,0x6a37,0x7a16,
1.52 + 0x0af1,0x1ad0,0x2ab3,0x3a92,0xfd2e,0xed0f,0xdd6c,0xcd4d,0xbdaa,0xad8b,0x9de8,
1.53 + 0x8dc9,0x7c26,0x6c07,0x5c64,0x4c45,0x3ca2,0x2c83,0x1ce0,0x0cc1,0xef1f,0xff3e,
1.54 + 0xcf5d,0xdf7c,0xaf9b,0xbfba,0x8fd9,0x9ff8,0x6e17,0x7e36,0x4e55,0x5e74,0x2e93,
1.55 + 0x3eb2,0x0ed1,0x1ef0
1.56 + };
1.57 +
1.58 +YModem::YModem(TBool aG)
1.59 + {
1.60 + iTimeout=2000000;
1.61 + iPacketSize=0;
1.62 + iInitChar=aG?BIGG:BIGC;
1.63 + }
1.64 +
1.65 +void YModem::UpdateCrc(const TUint8* aPtr, TInt aLength)
1.66 +//
1.67 +// Perform a CCITT CRC checksum.
1.68 +//
1.69 + {
1.70 +
1.71 + register const TUint8* pB=aPtr;
1.72 + register TUint16 crc=iCrc;
1.73 + while (aLength--)
1.74 + crc=TUint16((crc<<8)^crcTab[(crc>>8)^*pB++]);
1.75 + iCrc=crc;
1.76 + }
1.77 +
1.78 +TInt YModem::ReadPacket(TDes8& aDest)
1.79 + {
1.80 + TUint8* pD = (TUint8*)aDest.Ptr();
1.81 + TInt r;
1.82 + TPtr8 d(pD, 0, 1);
1.83 + r = ReadBlock(d);
1.84 + if (r != KErrNone)
1.85 + return r;
1.86 + if (d.Length()==0)
1.87 + return KErrZeroLengthPacket;
1.88 + TUint8 b0 = *pD;
1.89 + if (b0==CAN)
1.90 + return KErrAbort;
1.91 + if (b0==EOT)
1.92 + return KErrEof;
1.93 + if (b0==SOH)
1.94 + iBlockSize=128;
1.95 + else if (b0==STX)
1.96 + iBlockSize=1024;
1.97 + else
1.98 + return KErrBadPacketType;
1.99 + iTimeout=5000000;
1.100 + iPacketSize = iBlockSize+5;
1.101 + d.Set(pD+1, 0, iPacketSize-1);
1.102 + r = ReadBlock(d);
1.103 + if (r!=KErrNone && r!=KErrTimedOut)
1.104 + return r;
1.105 + if (d.Length() < iPacketSize-1)
1.106 + return KErrPacketTooShort;
1.107 + TUint8 seq = pD[1];
1.108 + TUint8 seqbar = pD[2];
1.109 + seqbar^=seq;
1.110 + if (seqbar != 0xff)
1.111 + return KErrCorruptSequenceNumber;
1.112 + if (seq==iSeqNum)
1.113 + return KErrAlreadyExists;
1.114 + else
1.115 + {
1.116 + TUint8 nextseq=(TUint8)(iSeqNum+1);
1.117 + if (seq!=nextseq)
1.118 + return KErrWrongSequenceNumber;
1.119 + }
1.120 + iCrc=0;
1.121 + UpdateCrc(pD+3, iBlockSize);
1.122 + aDest.SetLength(iPacketSize);
1.123 + TUint16 rx_crc = (TUint16)((pD[iPacketSize-2]<<8) | pD[iPacketSize-1]);
1.124 + if (rx_crc != iCrc)
1.125 + return KErrBadCrc;
1.126 + ++iSeqNum;
1.127 + return KErrNone;
1.128 + }
1.129 +
1.130 +TInt YModem::CheckPacket(TUint8* aDest)
1.131 + {
1.132 + const TUint8* p=iPacketBuf.Ptr()+3;
1.133 + if (iState>0)
1.134 + memcpy(aDest, p, iBlockSize);
1.135 + else
1.136 + {
1.137 + // parse packet 0
1.138 + TPtrC8 nameptr(p);
1.139 + TInt nLen=nameptr.Length();
1.140 + if (nLen==0)
1.141 + return KErrSessionClosed; // batch termination packet
1.142 + iFileName.Copy(nameptr.Left(Min(nLen,iFileName.MaxLength())));
1.143 + p+=nLen+1;
1.144 + iFileSize=0;
1.145 + for (;;)
1.146 + {
1.147 + TUint c=*p++;
1.148 + if (c<'0' || c>'9')
1.149 + break;
1.150 + iFileSize*=10;
1.151 + iFileSize+=c-'0';
1.152 + }
1.153 +// test.Printf(_L("File %S, size %d\n"),&iFileName,iFileSize);
1.154 + }
1.155 + return KErrNone;
1.156 + }
1.157 +
1.158 +TInt YModem::ReadPackets(TUint8*& aDest, TInt aLength)
1.159 + {
1.160 + TInt l=0;
1.161 + TInt r=KErrNone;
1.162 + while(l<aLength || iState==0)
1.163 + {
1.164 + TInt retries=0;
1.165 + for(retries=0; retries<KMaxRetries; retries++)
1.166 + {
1.167 + if (iState==0)
1.168 + iTimeout=2000000, WriteC(iInitChar);
1.169 + r=ReadPacket(iPacketBuf);
1.170 +// test.Printf(_L("%d\n"),r);
1.171 + if (r==KErrTimedOut)
1.172 + continue;
1.173 + if (r==KErrNone)
1.174 + r=CheckPacket(aDest);
1.175 + if (r==KErrEof || r==KErrSessionClosed)
1.176 + break;
1.177 + if (r==KErrNone || r==KErrAlreadyExists)
1.178 + {
1.179 + if (r==KErrNone)
1.180 + iState++;
1.181 + if (iState>1)
1.182 + aDest+=iBlockSize; // don't store packet 0
1.183 + if (iInitChar==BIGC)
1.184 + WriteC(ACK);
1.185 + if (iState==1)
1.186 + WriteC(iInitChar); // Send another 'C' after ACK
1.187 + if (r==KErrAlreadyExists)
1.188 + continue;
1.189 + break;
1.190 + }
1.191 + if (r==KErrAbort)
1.192 + break;
1.193 + if (iInitChar==BIGG)
1.194 + break;
1.195 + WriteC(NAK);
1.196 + }
1.197 + if (r==KErrNone)
1.198 + {
1.199 + if (iState>1)
1.200 + l+=iBlockSize;
1.201 + }
1.202 + else if (r==KErrSessionClosed)
1.203 + {
1.204 + if (iInitChar==BIGC)
1.205 + WriteC(ACK);
1.206 + break;
1.207 + }
1.208 + else if (r==KErrEof)
1.209 + {
1.210 + WriteC(ACK); // acknowledge end
1.211 + break;
1.212 + }
1.213 + else if (r!=KErrAbort)
1.214 + {
1.215 + WriteC(CAN);
1.216 + WriteC(CAN);
1.217 + WriteC(CAN);
1.218 + WriteC(CAN);
1.219 + WriteC(CAN);
1.220 + break;
1.221 + }
1.222 + }
1.223 + return r;
1.224 + }
1.225 +
1.226 +TInt YModem::StartDownload(TBool aG, TInt& aLength, TDes& aName)
1.227 + {
1.228 + TInt r;
1.229 + iInitChar=aG?BIGG:BIGC;
1.230 + iState=0;
1.231 + iSeqNum=255;
1.232 + TUint8* dummy=NULL;
1.233 + r=ReadPackets(dummy, 0); // read the file description packet
1.234 + if (r==KErrNone)
1.235 + {
1.236 + aLength=iFileSize; // return file name and file size
1.237 + aName=iFileName;
1.238 + }
1.239 + return r;
1.240 + }
1.241 +