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Diffstat (limited to 'crypto/openssh/compress.c')
| -rw-r--r-- | crypto/openssh/compress.c | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/crypto/openssh/compress.c b/crypto/openssh/compress.c deleted file mode 100644 index f4a87857348f4..0000000000000 --- a/crypto/openssh/compress.c +++ /dev/null @@ -1,165 +0,0 @@ -/* - * - * compress.c - * - * Author: Tatu Ylonen <ylo@cs.hut.fi> - * - * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland - * All rights reserved - * - * Created: Wed Oct 25 22:12:46 1995 ylo - * - * Interface to packet compression for ssh. - * - */ - -#include "includes.h" -RCSID("$Id: compress.c,v 1.4 1999/11/24 19:53:46 markus Exp $"); - -#include "ssh.h" -#include "buffer.h" -#include "zlib.h" - -static z_stream incoming_stream; -static z_stream outgoing_stream; - -/* - * Initializes compression; level is compression level from 1 to 9 - * (as in gzip). - */ - -void -buffer_compress_init(int level) -{ - debug("Enabling compression at level %d.", level); - if (level < 1 || level > 9) - fatal("Bad compression level %d.", level); - inflateInit(&incoming_stream); - deflateInit(&outgoing_stream, level); -} - -/* Frees any data structures allocated for compression. */ - -void -buffer_compress_uninit() -{ - debug("compress outgoing: raw data %lu, compressed %lu, factor %.2f", - outgoing_stream.total_in, outgoing_stream.total_out, - outgoing_stream.total_in == 0 ? 0.0 : - (double) outgoing_stream.total_out / outgoing_stream.total_in); - debug("compress incoming: raw data %lu, compressed %lu, factor %.2f", - incoming_stream.total_out, incoming_stream.total_in, - incoming_stream.total_out == 0 ? 0.0 : - (double) incoming_stream.total_in / incoming_stream.total_out); - inflateEnd(&incoming_stream); - deflateEnd(&outgoing_stream); -} - -/* - * Compresses the contents of input_buffer into output_buffer. All packets - * compressed using this function will form a single compressed data stream; - * however, data will be flushed at the end of every call so that each - * output_buffer can be decompressed independently (but in the appropriate - * order since they together form a single compression stream) by the - * receiver. This appends the compressed data to the output buffer. - */ - -void -buffer_compress(Buffer * input_buffer, Buffer * output_buffer) -{ - char buf[4096]; - int status; - - /* This case is not handled below. */ - if (buffer_len(input_buffer) == 0) - return; - - /* Input is the contents of the input buffer. */ - outgoing_stream.next_in = buffer_ptr(input_buffer); - outgoing_stream.avail_in = buffer_len(input_buffer); - - /* Loop compressing until deflate() returns with avail_out != 0. */ - do { - /* Set up fixed-size output buffer. */ - outgoing_stream.next_out = buf; - outgoing_stream.avail_out = sizeof(buf); - - /* Compress as much data into the buffer as possible. */ - status = deflate(&outgoing_stream, Z_PARTIAL_FLUSH); - switch (status) { - case Z_OK: - /* Append compressed data to output_buffer. */ - buffer_append(output_buffer, buf, - sizeof(buf) - outgoing_stream.avail_out); - break; - case Z_STREAM_END: - fatal("buffer_compress: deflate returned Z_STREAM_END"); - /* NOTREACHED */ - case Z_STREAM_ERROR: - fatal("buffer_compress: deflate returned Z_STREAM_ERROR"); - /* NOTREACHED */ - case Z_BUF_ERROR: - fatal("buffer_compress: deflate returned Z_BUF_ERROR"); - /* NOTREACHED */ - default: - fatal("buffer_compress: deflate returned %d", status); - /* NOTREACHED */ - } - } - while (outgoing_stream.avail_out == 0); -} - -/* - * Uncompresses the contents of input_buffer into output_buffer. All packets - * uncompressed using this function will form a single compressed data - * stream; however, data will be flushed at the end of every call so that - * each output_buffer. This must be called for the same size units that the - * buffer_compress was called, and in the same order that buffers compressed - * with that. This appends the uncompressed data to the output buffer. - */ - -void -buffer_uncompress(Buffer * input_buffer, Buffer * output_buffer) -{ - char buf[4096]; - int status; - - incoming_stream.next_in = buffer_ptr(input_buffer); - incoming_stream.avail_in = buffer_len(input_buffer); - - incoming_stream.next_out = buf; - incoming_stream.avail_out = sizeof(buf); - - for (;;) { - status = inflate(&incoming_stream, Z_PARTIAL_FLUSH); - switch (status) { - case Z_OK: - buffer_append(output_buffer, buf, - sizeof(buf) - incoming_stream.avail_out); - incoming_stream.next_out = buf; - incoming_stream.avail_out = sizeof(buf); - break; - case Z_STREAM_END: - fatal("buffer_uncompress: inflate returned Z_STREAM_END"); - /* NOTREACHED */ - case Z_DATA_ERROR: - fatal("buffer_uncompress: inflate returned Z_DATA_ERROR"); - /* NOTREACHED */ - case Z_STREAM_ERROR: - fatal("buffer_uncompress: inflate returned Z_STREAM_ERROR"); - /* NOTREACHED */ - case Z_BUF_ERROR: - /* - * Comments in zlib.h say that we should keep calling - * inflate() until we get an error. This appears to - * be the error that we get. - */ - return; - case Z_MEM_ERROR: - fatal("buffer_uncompress: inflate returned Z_MEM_ERROR"); - /* NOTREACHED */ - default: - fatal("buffer_uncompress: inflate returned %d", status); - } - } -} |