*/
#include "includes.h"
-RCSID("$OpenBSD: compress.c,v 1.16 2001/12/19 07:18:56 deraadt Exp $");
+RCSID("$OpenBSD: compress.c,v 1.19 2002/03/18 17:31:54 provos Exp $");
#include "log.h"
#include "buffer.h"
#include "zlib.h"
#include "compress.h"
-static z_stream incoming_stream;
-static z_stream outgoing_stream;
+z_stream incoming_stream;
+z_stream outgoing_stream;
static int compress_init_send_called = 0;
static int compress_init_recv_called = 0;
+static int inflate_failed = 0;
+static int deflate_failed = 0;
/*
* Initializes compression; level is compression level from 1 to 9
incoming_stream.total_out, incoming_stream.total_in,
incoming_stream.total_out == 0 ? 0.0 :
(double) incoming_stream.total_in / incoming_stream.total_out);
- if (compress_init_recv_called == 1)
+ if (compress_init_recv_called == 1 && inflate_failed == 0)
inflateEnd(&incoming_stream);
- if (compress_init_send_called == 1)
+ if (compress_init_send_called == 1 && deflate_failed == 0)
deflateEnd(&outgoing_stream);
}
void
buffer_compress(Buffer * input_buffer, Buffer * output_buffer)
{
- char buf[4096];
+ u_char buf[4096];
int status;
/* This case is not handled below. */
return;
/* Input is the contents of the input buffer. */
- outgoing_stream.next_in = (u_char *) buffer_ptr(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 = (u_char *)buf;
+ outgoing_stream.next_out = buf;
outgoing_stream.avail_out = sizeof(buf);
/* Compress as much data into the buffer as possible. */
sizeof(buf) - outgoing_stream.avail_out);
break;
default:
+ deflate_failed = 1;
fatal("buffer_compress: deflate returned %d", status);
/* NOTREACHED */
}
void
buffer_uncompress(Buffer * input_buffer, Buffer * output_buffer)
{
- char buf[4096];
+ u_char buf[4096];
int status;
- incoming_stream.next_in = (u_char *) buffer_ptr(input_buffer);
+ incoming_stream.next_in = buffer_ptr(input_buffer);
incoming_stream.avail_in = buffer_len(input_buffer);
for (;;) {
/* Set up fixed-size output buffer. */
- incoming_stream.next_out = (u_char *) buf;
+ incoming_stream.next_out = buf;
incoming_stream.avail_out = sizeof(buf);
status = inflate(&incoming_stream, Z_PARTIAL_FLUSH);
*/
return;
default:
+ inflate_failed = 1;
fatal("buffer_uncompress: inflate returned %d", status);
/* NOTREACHED */
}