Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1 | /* |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame^] | 2 | * |
| 3 | * compress.h |
| 4 | * |
| 5 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
| 6 | * |
| 7 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 8 | * All rights reserved |
| 9 | * |
| 10 | * Created: Wed Oct 25 22:12:46 1995 ylo |
| 11 | * |
| 12 | * Interface to packet compression for ssh. |
| 13 | * |
| 14 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 15 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame^] | 16 | /* RCSID("$Id: compress.h,v 1.2 1999/11/24 13:26:22 damien Exp $"); */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 17 | |
| 18 | #ifndef COMPRESS_H |
| 19 | #define COMPRESS_H |
| 20 | |
| 21 | /* Initializes compression; level is compression level from 1 to 9 (as in |
| 22 | gzip). */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame^] | 23 | void buffer_compress_init(int level); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 24 | |
| 25 | /* Frees any data structures allocated by buffer_compress_init. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame^] | 26 | void buffer_compress_uninit(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 27 | |
| 28 | /* Compresses the contents of input_buffer into output_buffer. All |
| 29 | packets compressed using this function will form a single |
| 30 | compressed data stream; however, data will be flushed at the end of |
| 31 | every call so that each output_buffer can be decompressed |
| 32 | independently (but in the appropriate order since they together |
| 33 | form a single compression stream) by the receiver. This appends |
| 34 | the compressed data to the output buffer. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame^] | 35 | void buffer_compress(Buffer * input_buffer, Buffer * output_buffer); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 36 | |
| 37 | /* Uncompresses the contents of input_buffer into output_buffer. All |
| 38 | packets uncompressed using this function will form a single |
| 39 | compressed data stream; however, data will be flushed at the end of |
| 40 | every call so that each output_buffer. This must be called for the |
| 41 | same size units that the buffer_compress was called, and in the |
| 42 | same order that buffers compressed with that. This appends the |
| 43 | uncompressed data to the output buffer. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame^] | 44 | void buffer_uncompress(Buffer * input_buffer, Buffer * output_buffer); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 45 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame^] | 46 | #endif /* COMPRESS_H */ |