X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=modules%2Fbsd-comp.c;h=a9cf15be8f4a56faf9d4683e509c394c03d7fcf7;hp=d30e0d25f69da08dc4781cdfc6e1b58e85f0e9c0;hb=92c20f261b9618715d6b1579e997e8757a88174e;hpb=5079a982cc7f44cf230df1bec5520cbb9f5631ad;ds=sidebyside

diff --git a/modules/bsd-comp.c b/modules/bsd-comp.c
index d30e0d2..a9cf15b 100644
--- a/modules/bsd-comp.c
+++ b/modules/bsd-comp.c
@@ -39,12 +39,12 @@
 
 /*
  * This version is for use with STREAMS under SunOS 4.x,
- * DEC Alpha OSF/1, and AIX 4.x.
+ * DEC Alpha OSF/1, 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 1.17 1995/12/11 02:57:48 paulus Exp $
  */
 
-#ifdef __aix4__
+#ifdef AIX4
 #include <net/net_globals.h>
 #endif
 #include <sys/param.h>
@@ -54,27 +54,26 @@
 #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 OSF1
+#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
@@ -97,15 +96,6 @@
  *	    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.
  */
@@ -155,15 +145,13 @@ struct bsd_db {
 };
 
 #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,
@@ -177,7 +165,7 @@ static void	bsd_comp_stats __P((void *state, struct compstat *stats));
  * 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 */
@@ -202,7 +190,7 @@ struct compressor ppp_bsd_compress = {
 #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))
@@ -338,7 +326,7 @@ bsd_alloc(options, opt_len, decomp)
     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]);
@@ -372,7 +360,7 @@ bsd_alloc(options, opt_len, decomp)
 
     maxmaxcode = MAXCODE(bits);
     newlen = sizeof(*db) + (hsize-1) * (sizeof(db->dict[0]));
-    db = (struct bsd_db *) ALLOCATE(newlen);
+    db = (struct bsd_db *) ALLOC_NOSLEEP(newlen);
     if (!db)
 	return NULL;
     bzero(db, sizeof(*db) - sizeof(db->dict));
@@ -380,7 +368,7 @@ bsd_alloc(options, opt_len, decomp)
     if (!decomp) {
 	db->lens = NULL;
     } else {
-	db->lens = (u_short *) ALLOCATE((maxmaxcode+1) * sizeof(db->lens[0]));
+	db->lens = (u_short *) ALLOC_NOSLEEP((maxmaxcode+1) * sizeof(db->lens[0]));
 	if (!db->lens) {
 	    FREE(db, newlen);
 	    return NULL;
@@ -434,7 +422,7 @@ bsd_init(db, options, opt_len, unit, hdrlen, mru, debug, decomp)
 {
     int i;
 
-    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
 	|| BSD_NBITS(options[2]) != db->maxbits
 	|| decomp && db->lens == NULL)
@@ -463,13 +451,13 @@ bsd_init(db, options, opt_len, unit, hdrlen, mru, debug, decomp)
 }
 
 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
@@ -487,6 +475,8 @@ bsd_decomp_init(state, options, opt_len, unit, hdrlen, mru, debug)
  * 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)
@@ -1118,3 +1108,4 @@ bsd_decompress(state, cmsg, dmpp)
     *dmpp = mret;
     return DECOMP_OK;
 }
+#endif /* DO_BSD_COMPRESS */