1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux << 2 /* 1 /* 3 * ppp-comp.h - Definitions for doing PPP pack 2 * ppp-comp.h - Definitions for doing PPP packet compression. 4 * 3 * 5 * Copyright 1994-1998 Paul Mackerras. 4 * Copyright 1994-1998 Paul Mackerras. 6 * 5 * 7 * This program is free software; you can red 6 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Gener 7 * modify it under the terms of the GNU General Public License 9 * version 2 as published by the Free Softwar 8 * version 2 as published by the Free Software Foundation. 10 */ 9 */ 11 #ifndef _UAPI_NET_PPP_COMP_H 10 #ifndef _UAPI_NET_PPP_COMP_H 12 #define _UAPI_NET_PPP_COMP_H 11 #define _UAPI_NET_PPP_COMP_H 13 12 14 13 15 /* 14 /* 16 * CCP codes. 15 * CCP codes. 17 */ 16 */ 18 17 19 #define CCP_CONFREQ 1 18 #define CCP_CONFREQ 1 20 #define CCP_CONFACK 2 19 #define CCP_CONFACK 2 21 #define CCP_TERMREQ 5 20 #define CCP_TERMREQ 5 22 #define CCP_TERMACK 6 21 #define CCP_TERMACK 6 23 #define CCP_RESETREQ 14 22 #define CCP_RESETREQ 14 24 #define CCP_RESETACK 15 23 #define CCP_RESETACK 15 25 24 26 /* 25 /* 27 * Max # bytes for a CCP option 26 * Max # bytes for a CCP option 28 */ 27 */ 29 28 30 #define CCP_MAX_OPTION_LENGTH 32 29 #define CCP_MAX_OPTION_LENGTH 32 31 30 32 /* 31 /* 33 * Parts of a CCP packet. 32 * Parts of a CCP packet. 34 */ 33 */ 35 34 36 #define CCP_CODE(dp) ((dp)[0]) 35 #define CCP_CODE(dp) ((dp)[0]) 37 #define CCP_ID(dp) ((dp)[1]) 36 #define CCP_ID(dp) ((dp)[1]) 38 #define CCP_LENGTH(dp) (((dp)[2] << 8 37 #define CCP_LENGTH(dp) (((dp)[2] << 8) + (dp)[3]) 39 #define CCP_HDRLEN 4 38 #define CCP_HDRLEN 4 40 39 41 #define CCP_OPT_CODE(dp) ((dp)[0]) 40 #define CCP_OPT_CODE(dp) ((dp)[0]) 42 #define CCP_OPT_LENGTH(dp) ((dp)[1]) 41 #define CCP_OPT_LENGTH(dp) ((dp)[1]) 43 #define CCP_OPT_MINLEN 2 42 #define CCP_OPT_MINLEN 2 44 43 45 /* 44 /* 46 * Definitions for BSD-Compress. 45 * Definitions for BSD-Compress. 47 */ 46 */ 48 47 49 #define CI_BSD_COMPRESS 21 /* con 48 #define CI_BSD_COMPRESS 21 /* config. option for BSD-Compress */ 50 #define CILEN_BSD_COMPRESS 3 /* len 49 #define CILEN_BSD_COMPRESS 3 /* length of config. option */ 51 50 52 /* Macros for handling the 3rd byte of the BSD 51 /* Macros for handling the 3rd byte of the BSD-Compress config option. */ 53 #define BSD_NBITS(x) ((x) & 0x1F) 52 #define BSD_NBITS(x) ((x) & 0x1F) /* number of bits requested */ 54 #define BSD_VERSION(x) ((x) >> 5) 53 #define BSD_VERSION(x) ((x) >> 5) /* version of option format */ 55 #define BSD_CURRENT_VERSION 1 54 #define BSD_CURRENT_VERSION 1 /* current version number */ 56 #define BSD_MAKE_OPT(v, n) (((v) << 5) | 55 #define BSD_MAKE_OPT(v, n) (((v) << 5) | (n)) 57 56 58 #define BSD_MIN_BITS 9 /* sma 57 #define BSD_MIN_BITS 9 /* smallest code size supported */ 59 #define BSD_MAX_BITS 15 /* lar 58 #define BSD_MAX_BITS 15 /* largest code size supported */ 60 59 61 /* 60 /* 62 * Definitions for Deflate. 61 * Definitions for Deflate. 63 */ 62 */ 64 63 65 #define CI_DEFLATE 26 /* con 64 #define CI_DEFLATE 26 /* config option for Deflate */ 66 #define CI_DEFLATE_DRAFT 24 /* val 65 #define CI_DEFLATE_DRAFT 24 /* value used in original draft RFC */ 67 #define CILEN_DEFLATE 4 /* len 66 #define CILEN_DEFLATE 4 /* length of its config option */ 68 67 69 #define DEFLATE_MIN_SIZE 9 68 #define DEFLATE_MIN_SIZE 9 70 #define DEFLATE_MAX_SIZE 15 69 #define DEFLATE_MAX_SIZE 15 71 #define DEFLATE_METHOD_VAL 8 70 #define DEFLATE_METHOD_VAL 8 72 #define DEFLATE_SIZE(x) (((x) >> 4) + 71 #define DEFLATE_SIZE(x) (((x) >> 4) + 8) 73 #define DEFLATE_METHOD(x) ((x) & 0x0F) 72 #define DEFLATE_METHOD(x) ((x) & 0x0F) 74 #define DEFLATE_MAKE_OPT(w) ((((w) - 8) << 73 #define DEFLATE_MAKE_OPT(w) ((((w) - 8) << 4) + DEFLATE_METHOD_VAL) 75 #define DEFLATE_CHK_SEQUENCE 0 74 #define DEFLATE_CHK_SEQUENCE 0 76 75 77 /* 76 /* 78 * Definitions for MPPE. 77 * Definitions for MPPE. 79 */ 78 */ 80 79 81 #define CI_MPPE 18 /* conf 80 #define CI_MPPE 18 /* config option for MPPE */ 82 #define CILEN_MPPE 6 /* leng 81 #define CILEN_MPPE 6 /* length of config option */ 83 82 84 /* 83 /* 85 * Definitions for other, as yet unsupported, 84 * Definitions for other, as yet unsupported, compression methods. 86 */ 85 */ 87 86 88 #define CI_PREDICTOR_1 1 /* con 87 #define CI_PREDICTOR_1 1 /* config option for Predictor-1 */ 89 #define CILEN_PREDICTOR_1 2 /* len 88 #define CILEN_PREDICTOR_1 2 /* length of its config option */ 90 #define CI_PREDICTOR_2 2 /* con 89 #define CI_PREDICTOR_2 2 /* config option for Predictor-2 */ 91 #define CILEN_PREDICTOR_2 2 /* len 90 #define CILEN_PREDICTOR_2 2 /* length of its config option */ 92 91 93 92 94 #endif /* _UAPI_NET_PPP_COMP_H */ 93 #endif /* _UAPI_NET_PPP_COMP_H */ 95 94
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