Annotation of src/usr.bin/ssh/compress.h, Revision 1.8
1.1 deraadt 1: /*
1.2 deraadt 2: * Author: Tatu Ylonen <ylo@cs.hut.fi>
3: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4: * All rights reserved
5: * Interface to packet compression for ssh.
1.4 markus 6: *
1.6 deraadt 7: * As far as I am concerned, the code I have written for this software
8: * can be used freely for any purpose. Any derived versions of this
9: * software must be clearly marked as such, and if the derived work is
10: * incompatible with the protocol description in the RFC file, it must be
11: * called by a name other than "ssh" or "Secure Shell".
1.2 deraadt 12: */
1.1 deraadt 13:
1.8 ! markus 14: /* RCSID("$OpenBSD: compress.h,v 1.7 2000/12/20 19:37:22 markus Exp $"); */
1.1 deraadt 15:
16: #ifndef COMPRESS_H
17: #define COMPRESS_H
18:
1.3 markus 19: /*
20: * Initializes compression; level is compression level from 1 to 9 (as in
21: * gzip).
22: */
1.8 ! markus 23: void buffer_compress_init_send(int level);
! 24: void buffer_compress_init_recv(void);
1.1 deraadt 25:
26: /* Frees any data structures allocated by buffer_compress_init. */
1.7 markus 27: void buffer_compress_uninit(void);
1.1 deraadt 28:
1.3 markus 29: /*
30: * Compresses the contents of input_buffer into output_buffer. All packets
31: * compressed using this function will form a single compressed data stream;
32: * however, data will be flushed at the end of every call so that each
33: * output_buffer can be decompressed independently (but in the appropriate
34: * order since they together form a single compression stream) by the
35: * receiver. This appends the compressed data to the output buffer.
36: */
1.2 deraadt 37: void buffer_compress(Buffer * input_buffer, Buffer * output_buffer);
1.1 deraadt 38:
1.3 markus 39: /*
40: * Uncompresses the contents of input_buffer into output_buffer. All packets
41: * uncompressed using this function will form a single compressed data
42: * stream; however, data will be flushed at the end of every call so that
43: * each output_buffer. This must be called for the same size units that the
44: * buffer_compress was called, and in the same order that buffers compressed
45: * with that. This appends the uncompressed data to the output buffer.
46: */
1.2 deraadt 47: void buffer_uncompress(Buffer * input_buffer, Buffer * output_buffer);
1.1 deraadt 48:
1.2 deraadt 49: #endif /* COMPRESS_H */