/*
* This version is for use with STREAMS under SunOS 4.x,
- * DEC Alpha OSF/1, and AIX 4.x.
+ * Digital UNIX, AIX 4.x, and SVR4 systems including Solaris 2.
*
- * $Id: bsd-comp.c,v 1.8 1994/12/08 00:35:33 paulus Exp $
+ * $Id: bsd-comp.c,v 1.20 1996/08/28 06:31:57 paulus Exp $
*/
-#ifdef __aix4__
+#ifdef AIX4
#include <net/net_globals.h>
#endif
#include <sys/param.h>
#include <sys/types.h>
#include <sys/stream.h>
-#include <sys/socket.h>
-#include <net/if.h>
#include <net/ppp_defs.h>
-#include <net/ppp_str.h>
+#include "ppp_mod.h"
-#ifdef sun
-#include <sys/kmem_alloc.h>
-#define ALLOCATE(n) kmem_alloc((n), KMEM_NOSLEEP)
-#define FREE(p, n) kmem_free((p), (n))
+#ifdef SVR4
+#include <sys/byteorder.h>
+#ifndef _BIG_ENDIAN
+#define BSD_LITTLE_ENDIAN
#endif
-
-#ifdef __osf__
-#include <kern/kalloc.h>
-#define ALLOCATE(n) kalloc((n))
-#define FREE(p, n) kfree((p), (n))
#endif
-#ifdef __aix4__
-#define ALLOCATE(n) xmalloc((n), 0, pinned_heap)
-#define FREE(p, n) xmfree((p), pinned_heap)
+#ifdef __osf__
+#undef FIRST
+#undef LAST
+#define BSD_LITTLE_ENDIAN
#endif
#define PACKETPTR mblk_t *
#include <net/ppp-comp.h>
+#if DO_BSD_COMPRESS
+
/*
* PPP "BSD compress" compression
* The differences between this compression and the classic BSD LZW
* compression is not going well.
*/
-/*
- * Macros to extract protocol version and number of bits
- * from the third byte of the BSD Compress CCP configuration option.
- */
-#define BSD_VERSION(x) ((x) >> 5)
-#define BSD_NBITS(x) ((x) & 0x1F)
-
-#define BSD_CURRENT_VERSION 1
-
/*
* A dictionary for doing BSD compress.
*/
};
#define BSD_OVHD 2 /* BSD compress overhead/packet */
-#define MIN_BSD_BITS 9
-#define BSD_INIT_BITS MIN_BSD_BITS
-#define MAX_BSD_BITS 15
+#define BSD_INIT_BITS BSD_MIN_BITS
static void *bsd_comp_alloc __P((u_char *options, int opt_len));
static void *bsd_decomp_alloc __P((u_char *options, int opt_len));
static void bsd_free __P((void *state));
static int bsd_comp_init __P((void *state, u_char *options, int opt_len,
- int unit, int debug));
+ int unit, int hdrlen, int debug));
static int bsd_decomp_init __P((void *state, u_char *options, int opt_len,
int unit, int hdrlen, int mru, int debug));
static int bsd_compress __P((void *state, mblk_t **mret,
* Procedures exported to ppp_comp.c.
*/
struct compressor ppp_bsd_compress = {
- 0x21, /* compress_proto */
+ CI_BSD_COMPRESS, /* compress_proto */
bsd_comp_alloc, /* comp_alloc */
bsd_free, /* comp_free */
bsd_comp_init, /* comp_init */
#define LAST 255
#define MAXCODE(b) ((1 << (b)) - 1)
-#define BADCODEM1 MAXCODE(MAX_BSD_BITS);
+#define BADCODEM1 MAXCODE(BSD_MAX_BITS)
#define BSD_HASH(prefix,suffix,hshift) ((((u_int32_t)(suffix)) << (hshift)) \
^ (u_int32_t)(prefix))
db->ratio = 0;
db->bytes_out = 0;
db->in_count = 0;
- db->incomp_count = 0;
db->checkpoint = CHECK_GAP;
}
u_int newlen, hsize, hshift, maxmaxcode;
struct bsd_db *db;
- if (opt_len != 3 || options[0] != 0x21 || options[1] != 3
+ if (opt_len != 3 || options[0] != CI_BSD_COMPRESS || options[1] != 3
|| BSD_VERSION(options[2]) != BSD_CURRENT_VERSION)
return NULL;
+
bits = BSD_NBITS(options[2]);
switch (bits) {
case 9: /* needs 82152 for both directions */
maxmaxcode = MAXCODE(bits);
newlen = sizeof(*db) + (hsize-1) * (sizeof(db->dict[0]));
- db = (struct bsd_db *) ALLOCATE(newlen);
+#ifdef __osf__
+ db = (struct bsd_db *) ALLOC_SLEEP(newlen);
+#else
+ db = (struct bsd_db *) ALLOC_NOSLEEP(newlen);
+#endif
if (!db)
return NULL;
bzero(db, sizeof(*db) - sizeof(db->dict));
if (!decomp) {
db->lens = NULL;
} else {
- db->lens = (u_short *) ALLOCATE((maxmaxcode+1) * sizeof(db->lens[0]));
+#ifdef __osf__
+ db->lens = (u_short *) ALLOC_SLEEP((maxmaxcode+1) * sizeof(db->lens[0]));
+#else
+ db->lens = (u_short *) ALLOC_NOSLEEP((maxmaxcode+1) * sizeof(db->lens[0]));
+#endif
if (!db->lens) {
FREE(db, newlen);
return NULL;
{
int i;
- if (opt_len != 3 || options[0] != 0x21 || options[1] != 3
+ if (opt_len < CILEN_BSD_COMPRESS
+ || options[0] != CI_BSD_COMPRESS || options[1] != CILEN_BSD_COMPRESS
|| BSD_VERSION(options[2]) != BSD_CURRENT_VERSION
|| BSD_NBITS(options[2]) != db->maxbits
|| decomp && db->lens == NULL)
}
static int
-bsd_comp_init(state, options, opt_len, unit, debug)
+bsd_comp_init(state, options, opt_len, unit, hdrlen, debug)
void *state;
u_char *options;
- int opt_len, unit, debug;
+ int opt_len, unit, hdrlen, debug;
{
return bsd_init((struct bsd_db *) state, options, opt_len,
- unit, 0, 0, debug, 0);
+ unit, hdrlen, 0, debug, 0);
}
static int
* compress a packet
* One change from the BSD compress command is that when the
* code size expands, we do not output a bunch of padding.
+ *
+ * N.B. at present, we ignore the hdrlen specified in the comp_init call.
*/
static int /* new slen */
bsd_compress(state, mretp, mp, slen, maxolen)
if (ent < 0x21 || ent > 0xf9)
return;
- db->incomp_count++;
db->seqno++;
ilen = 1; /* count the protocol as 1 byte */
rptr += PPP_HDRLEN;
*dmpp = mret;
return DECOMP_OK;
}
+#endif /* DO_BSD_COMPRESS */