Uncompress on linux a UDP Payload compressed on win$ using closed source library Post: 302198796

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Top Forums Programming Uncompress on linux a UDP Payload compressed on win$ using closed source library Post 302198796 by sysadmin9 on Saturday 24th of May 2008 04:14:33 AM

05-24-2008

Registered User

Uncompress on linux a UDP Payload compressed on win$ using closed source library

I am trying to uncompress a UDP packets payload. The data was compressed using "Xceed Version 4.3" which is a closed source windows program. I need to uncompress the data on a linux box. The technical support people at Xceed tell me that the data was compressed using "the Deflate compression method and formatted using the ZLib format, which is a small header at the start of the data. " You can read the details of their reply at Xceed Community - Does Xceed use industry standard compression algorithms ?

An example of the compressed data is:
http://www.debtconsolidationcare.com...edpacket.1.txt

The complete capture of the UDP packets is at:
http://www.debtconsolidationcare.com...p/wireread.txt

I have tried running:
# g++ zpipe.c -lz [zpipe.c is at http://www.zlib.net/zpipe.c ]
# ./a.out -d < compressedpacket.1.txt > uncompressedpacket.1.txt
zpipe: invalid or incomplete deflate data

I am wondering how should I go about debugging the problem.

Any help and access to your time would be very much appreciated,

Best Wishes,
--
Vikas
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LEARN ABOUT ULTRIX

fsck.cramfs

FSCK.CRAMFS(8)						       System Administration						    FSCK.CRAMFS(8)

NAME

       fsck.cramfs - fsck compressed ROM file system

SYNOPSIS

       fsck.cramfs [options] file

DESCRIPTION

       fsck.cramfs is used to check the cramfs file system.

OPTIONS

       -v, --verbose
	      Enable verbose messaging.

       -b, --blocksize blocksize
	      Use this blocksize, defaults to page size. Must be equal to what was set at creation time. Only used for --extract.

       --extract[=directory]
	      Test to uncompress the whole file system. Optionally extract contents of the file to directory.

       -a     This option is silently ignored.

       -y     This option is silently ignored.

       -V, --version
	      Display version information and exit.

       -h, --help
	      Display help text and exit.

EXIT STATUS

	      0      success
	      4      file system was left uncorrected
	      8      operation error, such as unable to allocate memory
	      16     usage information was printed

SEE ALSO

       mount(8), mkfs.cramfs(8)

AVAILABILITY

       The  example  command  is part of the util-linux package and is available from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils
       /util-linux/>.

util-linux							    April 2013							    FSCK.CRAMFS(8)