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fix interop issue in ip compression. for inbound, we need to use

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default window size, in case the peer uses large window size
This commit is contained in:
itojun 2000-01-16 17:56:46 +00:00
parent dbed54b091
commit 358b6d44ac
1 changed files with 11 additions and 4 deletions
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15
sys/netinet6/ipcomp_core.c
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@ -1,4 +1,4 @@
/* $NetBSD: ipcomp_core.c,v 1.6 2000/01/06 15:46:10 itojun Exp $ */
/* $NetBSD: ipcomp_core.c,v 1.7 2000/01/16 17:56:46 itojun Exp $ */
/*
* Copyright (C) 1999 WIDE Project.
@ -57,14 +57,21 @@
#include <machine/stdarg.h>
#include <net/net_osdep.h>
static void *deflate_alloc __P((void *, u_int, u_int));
static void deflate_free __P((void *, void *));
static int deflate_common __P((struct mbuf *, struct mbuf *, size_t *, int));
static int deflate_compress __P((struct mbuf *, struct mbuf *, size_t *));
static int deflate_decompress __P((struct mbuf *, struct mbuf *, size_t *));
/*
* We need to use default window size (2^15 = 32Kbytes as of writing) for
* inbound case. Otherwise we get interop problem.
*/
static int deflate_policy = Z_DEFAULT_COMPRESSION;
static int deflate_window = 12; /* 2^12 = 4Kbytes */
static int deflate_window_out = 12;
static const int deflate_window_in = MAX_WBITS; /* don't change it */
static int deflate_memlevel = MAX_MEM_LEVEL;
struct ipcomp_algorithm ipcomp_algorithms[] = {
@ -122,9 +129,9 @@ deflate_common(m, md, lenp, mode)
zs.zalloc = deflate_alloc;
zs.zfree = deflate_free;
zerror = mode ? inflateInit2(&zs, deflate_window)
zerror = mode ? inflateInit2(&zs, deflate_window_in)
: deflateInit2(&zs, deflate_policy, Z_DEFLATED,
deflate_window, deflate_memlevel,
deflate_window_out, deflate_memlevel,
Z_DEFAULT_STRATEGY);
if (zerror != Z_OK) {
error = ENOBUFS;