X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=include%2Flinux%2Fppp-comp.h;h=cc56636ca2347822716e5fa761937027938232a8;hp=b72da192341b8aab9f32f0fcf6670fe34ac1ad47;hb=6df1318f7c7c2afa76293e90671aac884488a19d;hpb=0f61ac5460e89dd768f1fb56fbdd8fa6f8af79f1

diff --git a/include/linux/ppp-comp.h b/include/linux/ppp-comp.h
index b72da19..cc56636 100644
--- a/include/linux/ppp-comp.h
+++ b/include/linux/ppp-comp.h
@@ -24,14 +24,14 @@
  * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
  * OR MODIFICATIONS.
  *
- * $Id: ppp-comp.h,v 1.1 1995/12/18 03:38:10 paulus Exp $
+ * $Id: ppp-comp.h,v 1.6 1997/11/27 06:04:44 paulus Exp $
  */
 
 /*
- *  ==FILEVERSION 4==
+ *  ==FILEVERSION 971024==
  *
  *  NOTE TO MAINTAINERS:
- *     If you modify this file at all, increment the number above.
+ *     If you modify this file at all, please set the above date.
  *     ppp-comp.h is shipped with a PPP distribution as well as with the kernel;
  *     if everyone increases the FILEVERSION number above, then scripts
  *     can do the right thing when deciding whether to install a new ppp-comp.h
@@ -50,16 +50,16 @@
 #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
-#define DO_DEFLATE	0
 
 /*
  * Structure giving methods for compression/decompression.
  */
 
-#ifdef PACKETPTR
 struct compressor {
 	int	compress_proto;	/* CCP compression protocol number */
 
@@ -107,20 +107,21 @@ struct compressor {
 	/* Return decompression statistics */
 	void	(*decomp_stat) (void *state, struct compstat *stats);
 };
-#endif /* PACKETPTR */
 
 /*
- * Return values for decompress routine.
- * We need to make these distinctions so that we can disable certain
+ * The return value from decompress routine is the length of the
+ * decompressed packet if successful, otherwise DECOMP_ERROR
+ * or DECOMP_FATALERROR if an error occurred.
+ * 
+ * We need to make this distinction so that we can disable certain
  * useful functionality, namely sending a CCP reset-request as a result
  * of an error detected after decompression.  This is to avoid infringing
  * a patent held by Motorola.
  * Don't you just lurve software patents.
  */
 
-#define DECOMP_OK		0	/* everything went OK */
-#define DECOMP_ERROR		1	/* error detected before decomp. */
-#define DECOMP_FATALERROR	2	/* error detected after decomp. */
+#define DECOMP_ERROR		-1	/* error detected before decomp. */
+#define DECOMP_FATALERROR	-2	/* error detected after decomp. */
 
 /*
  * CCP codes.
@@ -169,14 +170,9 @@ struct compressor {
 #define BSD_MAX_BITS		15	/* largest code size supported */
 
 /*
- * Definitions for other, as yet unsupported, compression methods.
+ * Definitions for Deflate.
  */
 
-#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 */
-
 #define CI_DEFLATE		24	/* config option for Deflate */
 #define CILEN_DEFLATE		4	/* length of its config option */
 
@@ -189,4 +185,13 @@ struct compressor {
 				 + 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 */