define DO_BSD_COMPRESS

[ppp.git] / include / net / ppp-comp.h

diff --git a/include/net/ppp-comp.h b/include/net/ppp-comp.h
index 76e5c622ca15e448cd3442bb64cae29518ca7eff..e2579f85702acd42b78b8a533c8eae2581eb6d15 100644 (file)
--- a/include/net/ppp-comp.h
+++ b/include/net/ppp-comp.h
@@ -24,12 +24,24 @@
  * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
  * OR MODIFICATIONS.
  *
- * $Id: ppp-comp.h,v 1.2 1994/09/16 01:57:34 paulus Exp $
+ * $Id: ppp-comp.h,v 1.7 1995/05/01 01:43:37 paulus Exp $
  */
 
+#ifndef _NET_PPP_COMP_H
+#define _NET_PPP_COMP_H
+
+/*
+ * The following symbols control whether we include code for
+ * various compression methods.
+ */
+#ifndef DO_BSD_COMPRESS
+#define DO_BSD_COMPRESS        1       /* by default, include BSD-Compress */
+#endif
+
 /*
  * Structure giving methods for compression/decompression.
  */
+#ifdef PACKETPTR
 struct compressor {
        int     compress_proto; /* CCP compression protocol number */
 
@@ -39,12 +51,14 @@ struct compressor {
        void    (*comp_free) __P((void *state));
        /* Initialize a compressor */
        int     (*comp_init) __P((void *state, u_char *options, int opt_len,
-                                 int unit, int debug));
+                                 int unit, int hdrlen, int debug));
        /* Reset a compressor */
        void    (*comp_reset) __P((void *state));
        /* Compress a packet */
-       int     (*compress) __P((void *state, PACKET **mret,
-                                PACKET *mp, int orig_len, int max_len));
+       int     (*compress) __P((void *state, PACKETPTR *mret,
+                                PACKETPTR mp, int orig_len, int max_len));
+       /* Return compression statistics */
+       void    (*comp_stat) __P((void *state, struct compstat *stats));
 
        /* Allocate space for a decompressor (receive side) */
        void    *(*decomp_alloc) __P((u_char *options, int opt_len));
@@ -52,14 +66,18 @@ struct compressor {
        void    (*decomp_free) __P((void *state));
        /* Initialize a decompressor */
        int     (*decomp_init) __P((void *state, u_char *options, int opt_len,
-                                   int unit, int mru, int debug));
+                                   int unit, int hdrlen, int mru, int debug));
        /* Reset a decompressor */
        void    (*decomp_reset) __P((void *state));
        /* Decompress a packet. */
-       int     (*decompress) __P((void *state, PACKET *mp, PACKET **dmpp));
+       int     (*decompress) __P((void *state, PACKETPTR mp,
+                                  PACKETPTR *dmpp));
        /* Update state for an incompressible packet received */
-       void    (*incomp) __P((void *state, PACKET *mp));
+       void    (*incomp) __P((void *state, PACKETPTR mp));
+       /* Return decompression statistics */
+       void    (*decomp_stat) __P((void *state, struct compstat *stats));
 };
+#endif /* PACKETPTR */
 
 /*
  * Return values for decompress routine.
@@ -100,3 +118,19 @@ struct compressor {
 #define CCP_OPT_LENGTH(dp)     ((dp)[1])
 #define CCP_OPT_MINLEN         2
 
+/*
+ * Definitions for BSD-Compress.
+ */
+#define CI_BSD_COMPRESS                21      /* config. option for BSD-Compress */
+#define CILEN_BSD_COMPRESS     3       /* length of config. option */
+
+/* Macros for handling the 3rd byte of the BSD-Compress config option. */
+#define BSD_NBITS(x)           ((x) & 0x1F)    /* number of bits requested */
+#define BSD_VERSION(x)         ((x) >> 5)      /* version of option format */
+#define BSD_CURRENT_VERSION    1               /* current version number */
+#define BSD_MAKE_OPT(v, n)     (((v) << 5) | (n))
+
+#define BSD_MIN_BITS           9       /* smallest code size supported */
+#define BSD_MAX_BITS           15      /* largest code size supported */
+
+#endif /* _NET_PPP_COMP_H */