ZModem4DotNET

Class to get file through ZModem.

This function send a file using ZModem protocol

Absolute file path Timeout for the operation. Not implemented yet. true if succeded, otherwise false

Constructor. Make sure that the serial port is accessible...

Serial port object

Parameters for ZSINIT frame: Max length of attention string = 32

This event is used to communicate the session state

This event is used to communicate the file name and size informations

This event is used to report progress during transfert.

Treatment function when a data is received during frame reception

the byte received Is this byte indicate a end of the frame? Is a Zackanswer requeste? Was there a transmission error? Do we nee to send the Attn sequence? Next received bytes are a header

This event is used to report progress during transfert.

Internal class used to decode File Information sent during ZModem session

Constructor, decode a ZFILE frame to readable information

ZFILE header Received Data

Constructor, decode a ZFILE frame to readable information

ZFILE header Memory Stream

Constructor, decode a ZFILE binary frame to readable information

Memory Stream

This enumeration is used to describe the session state.

Session not initialized yet: closing SW is possible.

Session on-going: closing SW may freeze remote device for 60s.

Session on-going, transfert on-going: closing SW may crash remote device and serial port.

Session on-going, transfert Completed: closing SW may freeze remote device for 60s.

Session closed: closing SW is possible.

An error occured. Will try to restore session.

Header Format for ZModem protocol

Hex Header

16bit CRC Binary Header

32bit CRC Binary Header

Header types for ZModem protocol

Request receive init

Receive init

Send init sequence (optional)

ACK to above

File name from sender

To sender: skip this file

Last packet was garbled

Abort batch transfers

Finish session

Resume data transmition at this position

Data packet(s) follow

End of file

Fatal Read or Write error Detected

Request for file CRC and response

Receiver's Challenge

Request is complete

Other end canned session with CAN*5

Request for free bytes on filesystem

Command from sending program

Output to standard error, data follows

Bit Masks for ZRINIT header, one of these ored in ZF0

Rx can send and receive true FDX

Rx can receive data during disk I/O

Rx can send a break signal

Receiver can decrypt

Receiver can uncompress

Receiver can use 32 bit Frame Check

Receiver expects ctl chars to be escaped

Receiver expects 8th bit to be escaped

Parameters for ZSINIT Header, in ZF0

Transmitter expects ctl chars to be escaped

Transmitter expects 8th bit to be escaped

Parameters for ZFILE frame : one of these in ZF0 (Conversion options)

No option = sender default option.

Binary transfer - inhibit conversion

Convert NL to local end of line convention

Resume interrupted file transfer

Management options for ZFILE Header, one of these ored in ZF1 (Management options)

No option = sender default option

Skip file if not present at rx (O200)

Mask for the choices below (O37)

Transfer if source newer or longer

Transfer if different file CRC or length

Append contents to existing file (if any)

Replace existing file

Transfer if source newer

Transfer if dates or lengths different

Protect destination file

Management options for ZFILE Header, one of these in ZF2 (Transport options)

No option = sender default option

Lempel-Ziv compression

Encryption

Run Length encoding

Management options for ZFILE Header, one of these in ZF3 (Extended options)

No option = sender default option

Encoding for sparse file operations

Parameters for ZCOMMAND Header, one of these in ZF0 (otherwise 0)

Acknowledge, then do command

Control Bytes used for ZModem protocol

Padding char begins all frames ('*' = 42 = O52)

Ctrl-X Zmodem escape char (24 = O30)

Escaped ZDLE as transmitted (88 = O30^O100)

Binary frame indicator ('A')

HEX frame indicator ('B')

Binary frame with 32bits FCS indicator ('C')

XON caracter (17)

XOFF caracter (19)

CR caracter (13)

LF caracter (10)

ZDLE sequences

CRC next, frame ends, header packet follows

CRC next, frame continues nonstop

CRC next, frame continues, ZACK expected

CRC next, ZACK expected, end of frame

Translate to rubout 0177

Translate to rubout 0377

internal class to decrypt ZModem header

Decode a potential ZDLE encoded byte

Byte array index of the byte in the array Byte ZDLE decoded

Decode a potential ZDLE encoded byte

MemoryStream Byte ZDLE decoded

Decrypt header value and provide it as an int

arguments value (int)

Constructor. It decode a Byte array to a ZModem header.

Byte array index of the byte in the array

This class is wonderfull, it solves the SerialPort IOException on some computers! http://zachsaw.blogspot.de/2010/07/serialport-ioexception-workaround-in-c.html

Class used for ZModem crc checks

Initial value for Crc16Ccitt computation