* ppp_deflate.c - interface the zlib procedures for Deflate compression
* and decompression (as used by gzip) to the PPP code.
*
- * Copyright (c) 1994 The Australian National University.
- * All rights reserved.
+ * Copyright (c) 1994 Paul Mackerras. All rights reserved.
*
- * Permission to use, copy, modify, and distribute this software and its
- * documentation is hereby granted, provided that the above copyright
- * notice appears in all copies. This software is provided without any
- * warranty, express or implied. The Australian National University
- * makes no representations about the suitability of this software for
- * any purpose.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
*
- * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
- * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
- * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
- * THE AUSTRALIAN NATIONAL UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY
- * OF SUCH DAMAGE.
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
*
- * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
- * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
- * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
- * OR MODIFICATIONS.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
*
- * $Id: deflate.c,v 1.3 1999/04/16 11:35:59 paulus Exp $
+ * 3. The name(s) of the authors of this software must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission.
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by Paul Mackerras
+ * <paulus@ozlabs.org>".
+ *
+ * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * $Id: deflate.c,v 1.5 2004/01/17 05:47:55 carlsonj Exp $
*/
#include <sys/types.h>
+#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
-#include "ppp_defs.h"
+#include <string.h>
+
#include "ppp-comp.h"
#include "zlib.h"
#define DEFLATE_OVHD 2 /* Deflate overhead/packet */
-static void *z_alloc __P((void *, u_int items, u_int size));
-static void z_free __P((void *, void *ptr, u_int nb));
-static void *z_decomp_alloc __P((u_char *options, int opt_len));
-static void z_decomp_free __P((void *state));
-static int z_decomp_init __P((void *state, u_char *options, int opt_len,
- int unit, int hdrlen, int mru, int debug));
-static void z_incomp __P((void *state, u_char *dmsg, int len));
-static int z_decompress __P((void *state, u_char *cmp, int inlen,
- u_char *dmp, int *outlenp));
-static void z_decomp_reset __P((void *state));
-static void z_comp_stats __P((void *state, struct compstat *stats));
+static void *z_alloc(void *, u_int items, u_int size);
+static void z_free(void *, void *ptr, u_int nb);
+static void *z_decomp_alloc(u_char *options, int opt_len);
+static void z_decomp_free(void *state);
+static int z_decomp_init(void *state, u_char *options, int opt_len,
+ int unit, int hdrlen, int mru, int debug);
+static void z_incomp(void *state, u_char *dmsg, int len);
+static int z_decompress(void *state, u_char *cmp, int inlen,
+ u_char *dmp, int *outlenp);
+static void z_decomp_reset(void *state);
+static void z_comp_stats(void *state, struct compstat *stats);
/*
* Procedures exported to if_ppp.c.
* Space allocation and freeing routines for use by zlib routines.
*/
static void *
-z_alloc(notused, items, size)
- void *notused;
- u_int items, size;
+z_alloc(void *notused, u_int items, u_int size)
{
return malloc(items * size);
}
static void
-z_free(notused, ptr, nbytes)
- void *notused;
- void *ptr;
- u_int nbytes;
+z_free(void *notused, void *ptr, u_int nbytes)
{
free(ptr);
}
static void
-z_comp_stats(arg, stats)
- void *arg;
- struct compstat *stats;
+z_comp_stats(void *arg, struct compstat *stats)
{
struct deflate_state *state = (struct deflate_state *) arg;
u_int out;
*stats = state->stats;
stats->ratio = stats->unc_bytes;
out = stats->comp_bytes + stats->unc_bytes;
- if (stats->ratio <= 0x7ffffff)
- stats->ratio <<= 8;
+ u_int ratio = stats->ratio;
+ if (ratio <= 0x7ffffff)
+ ratio <<= 8;
else
out >>= 8;
if (out != 0)
- stats->ratio /= out;
+ stats->ratio = ratio / out;
}
/*
* Allocate space for a decompressor.
*/
static void *
-z_decomp_alloc(options, opt_len)
- u_char *options;
- int opt_len;
+z_decomp_alloc(u_char *options, int opt_len)
{
struct deflate_state *state;
int w_size;
}
static void
-z_decomp_free(arg)
- void *arg;
+z_decomp_free(void *arg)
{
struct deflate_state *state = (struct deflate_state *) arg;
}
static int
-z_decomp_init(arg, options, opt_len, unit, hdrlen, mru, debug)
- void *arg;
- u_char *options;
- int opt_len, unit, hdrlen, mru, debug;
+z_decomp_init(void *arg, u_char *options, int opt_len,
+ int unit, int hdrlen, int mru, int debug)
{
struct deflate_state *state = (struct deflate_state *) arg;
}
static void
-z_decomp_reset(arg)
- void *arg;
+z_decomp_reset(void *arg)
{
struct deflate_state *state = (struct deflate_state *) arg;
* compression, even though they are detected by inspecting the input.
*/
static int
-z_decompress(arg, mi, inlen, mo, outlenp)
- void *arg;
- u_char *mi, *mo;
- int inlen, *outlenp;
+z_decompress(void *arg, u_char *mi, int inlen, u_char *mo, int *outlenp)
{
struct deflate_state *state = (struct deflate_state *) arg;
u_char *rptr, *wptr;
- int rlen, olen, ospace;
- int seq, i, flush, r, decode_proto;
+ int rlen, olen;
+ int seq, r;
rptr = mi;
if (*rptr == 0)
* Incompressible data has arrived - add it to the history.
*/
static void
-z_incomp(arg, mi, mlen)
- void *arg;
- u_char *mi;
- int mlen;
+z_incomp(void *arg, u_char *mi, int mlen)
{
struct deflate_state *state = (struct deflate_state *) arg;
u_char *rptr;
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