+/*
+ * 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 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 */
+
+#define CI_DEFLATE 24 /* config option for Deflate */
+#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
+
+#endif /* _NET_PPP_COMP_H */