2000-02-24 14:29:47 +00:00
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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* All rights reserved
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* Interface to packet compression for ssh.
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2000-05-15 04:37:24 +00:00
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*
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2000-09-10 08:31:17 +00:00
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* As far as I am concerned, the code I have written for this software
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* can be used freely for any purpose. Any derived versions of this
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* software must be clearly marked as such, and if the derived work is
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* incompatible with the protocol description in the RFC file, it must be
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* called by a name other than "ssh" or "Secure Shell".
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2000-02-24 14:29:47 +00:00
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*/
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2001-05-04 03:57:05 +00:00
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/* RCSID("$OpenBSD: compress.h,v 1.8 2001/04/05 10:39:02 markus Exp $"); */
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2000-02-24 14:29:47 +00:00
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#ifndef COMPRESS_H
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#define COMPRESS_H
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/*
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* Initializes compression; level is compression level from 1 to 9 (as in
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* gzip).
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*/
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2001-05-04 03:57:05 +00:00
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void buffer_compress_init_send(int level);
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void buffer_compress_init_recv(void);
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2000-02-24 14:29:47 +00:00
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/* Frees any data structures allocated by buffer_compress_init. */
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2001-05-04 03:57:05 +00:00
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void buffer_compress_uninit(void);
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2000-02-24 14:29:47 +00:00
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/*
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* Compresses the contents of input_buffer into output_buffer. All packets
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* compressed using this function will form a single compressed data stream;
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* however, data will be flushed at the end of every call so that each
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* output_buffer can be decompressed independently (but in the appropriate
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* order since they together form a single compression stream) by the
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* receiver. This appends the compressed data to the output buffer.
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*/
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void buffer_compress(Buffer * input_buffer, Buffer * output_buffer);
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/*
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* Uncompresses the contents of input_buffer into output_buffer. All packets
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* uncompressed using this function will form a single compressed data
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* stream; however, data will be flushed at the end of every call so that
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* each output_buffer. This must be called for the same size units that the
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* buffer_compress was called, and in the same order that buffers compressed
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* with that. This appends the uncompressed data to the output buffer.
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*/
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void buffer_uncompress(Buffer * input_buffer, Buffer * output_buffer);
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#endif /* COMPRESS_H */
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