exit with an appropriate value to indicate what happened

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

diff --git a/include/net/ppp-comp.h b/include/net/ppp-comp.h
index 906212b99e36447d24420cd4bc8039975816bac7..fe62a61f1cea008c96c90fc136a3968a1fac0fac 100644 (file)
--- a/include/net/ppp-comp.h
+++ b/include/net/ppp-comp.h
@@ -24,12 +24,29 @@
  * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
  * OR MODIFICATIONS.
  *
- * $Id: ppp-comp.h,v 1.4 1994/10/21 06:27:31 paulus Exp $
+ * $Id: ppp-comp.h,v 1.11 1998/03/25 03:33:34 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
+#ifndef DO_DEFLATE
+#define DO_DEFLATE     1       /* by default, include Deflate */
+#endif
+#define DO_PREDICTOR_1 0
+#define DO_PREDICTOR_2 0
+
 /*
  * Structure giving methods for compression/decompression.
  */
+#ifdef PACKETPTR
 struct compressor {
        int     compress_proto; /* CCP compression protocol number */
 
@@ -39,7 +56,7 @@ 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 */
@@ -54,7 +71,7 @@ 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. */
@@ -65,6 +82,7 @@ struct compressor {
        /* Return decompression statistics */
        void    (*decomp_stat) __P((void *state, struct compstat *stats));
 };
+#endif /* PACKETPTR */
 
 /*
  * Return values for decompress routine.
@@ -105,3 +123,43 @@ 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 */
+
+/*
+ * Definitions for Deflate.
+ */
+#define CI_DEFLATE             26      /* config option for Deflate */
+#define CI_DEFLATE_DRAFT       24      /* value used in original draft RFC */
+#define CILEN_DEFLATE          4       /* length of its config option */
+
+#define DEFLATE_MIN_SIZE       8
+#define DEFLATE_MAX_SIZE       15
+#define DEFLATE_METHOD_VAL     8
+#define DEFLATE_SIZE(x)                (((x) >> 4) + DEFLATE_MIN_SIZE)
+#define DEFLATE_METHOD(x)      ((x) & 0x0F)
+#define DEFLATE_MAKE_OPT(w)    ((((w) - DEFLATE_MIN_SIZE) << 4) \
+                                + DEFLATE_METHOD_VAL)
+#define DEFLATE_CHK_SEQUENCE   0
+
+/*
+ * Definitions for other, as yet unsupported, compression methods.
+ */
+#define CI_PREDICTOR_1         1       /* config option for Predictor-1 */
+#define CILEN_PREDICTOR_1      2       /* length of its config option */
+#define CI_PREDICTOR_2         2       /* config option for Predictor-2 */
+#define CILEN_PREDICTOR_2      2       /* length of its config option */
+
+#endif /* _NET_PPP_COMP_H */