1 /* 2 * ccp.h - Definitions for PPP Compression Control Protocol. 3 * 4 * Copyright (c) 1994-2002 Paul Mackerras. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. The name(s) of the authors of this software must not be used to 14 * endorse or promote products derived from this software without 15 * prior written permission. 16 * 17 * 3. Redistributions of any form whatsoever must retain the following 18 * acknowledgment: 19 * "This product includes software developed by Paul Mackerras 20 * <paulus@samba.org>". 21 * 22 * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO 23 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 24 * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY 25 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 26 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN 27 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 28 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 29 * 30 * $Id: ccp.h,v 1.12 2004/11/04 10:02:26 paulus Exp $ 31 */ 32 33 #include "netif/ppp/ppp_opts.h" 34 #if PPP_SUPPORT && CCP_SUPPORT /* don't build if not configured for use in lwipopts.h */ 35 36 #ifndef CCP_H 37 #define CCP_H 38 39 /* 40 * CCP codes. 41 */ 42 43 #define CCP_CONFREQ 1 44 #define CCP_CONFACK 2 45 #define CCP_TERMREQ 5 46 #define CCP_TERMACK 6 47 #define CCP_RESETREQ 14 48 #define CCP_RESETACK 15 49 50 /* 51 * Max # bytes for a CCP option 52 */ 53 54 #define CCP_MAX_OPTION_LENGTH 32 55 56 /* 57 * Parts of a CCP packet. 58 */ 59 60 #define CCP_CODE(dp) ((dp)[0]) 61 #define CCP_ID(dp) ((dp)[1]) 62 #define CCP_LENGTH(dp) (((dp)[2] << 8) + (dp)[3]) 63 #define CCP_HDRLEN 4 64 65 #define CCP_OPT_CODE(dp) ((dp)[0]) 66 #define CCP_OPT_LENGTH(dp) ((dp)[1]) 67 #define CCP_OPT_MINLEN 2 68 69 #if BSDCOMPRESS_SUPPORT 70 /* 71 * Definitions for BSD-Compress. 72 */ 73 74 #define CI_BSD_COMPRESS 21 /* config. option for BSD-Compress */ 75 #define CILEN_BSD_COMPRESS 3 /* length of config. option */ 76 77 /* Macros for handling the 3rd byte of the BSD-Compress config option. */ 78 #define BSD_NBITS(x) ((x) & 0x1F) /* number of bits requested */ 79 #define BSD_VERSION(x) ((x) >> 5) /* version of option format */ 80 #define BSD_CURRENT_VERSION 1 /* current version number */ 81 #define BSD_MAKE_OPT(v, n) (((v) << 5) | (n)) 82 83 #define BSD_MIN_BITS 9 /* smallest code size supported */ 84 #define BSD_MAX_BITS 15 /* largest code size supported */ 85 #endif /* BSDCOMPRESS_SUPPORT */ 86 87 #if DEFLATE_SUPPORT 88 /* 89 * Definitions for Deflate. 90 */ 91 92 #define CI_DEFLATE 26 /* config option for Deflate */ 93 #define CI_DEFLATE_DRAFT 24 /* value used in original draft RFC */ 94 #define CILEN_DEFLATE 4 /* length of its config option */ 95 96 #define DEFLATE_MIN_SIZE 9 97 #define DEFLATE_MAX_SIZE 15 98 #define DEFLATE_METHOD_VAL 8 99 #define DEFLATE_SIZE(x) (((x) >> 4) + 8) 100 #define DEFLATE_METHOD(x) ((x) & 0x0F) 101 #define DEFLATE_MAKE_OPT(w) ((((w) - 8) << 4) + DEFLATE_METHOD_VAL) 102 #define DEFLATE_CHK_SEQUENCE 0 103 #endif /* DEFLATE_SUPPORT */ 104 105 #if MPPE_SUPPORT 106 /* 107 * Definitions for MPPE. 108 */ 109 110 #define CI_MPPE 18 /* config option for MPPE */ 111 #define CILEN_MPPE 6 /* length of config option */ 112 #endif /* MPPE_SUPPORT */ 113 114 #if PREDICTOR_SUPPORT 115 /* 116 * Definitions for other, as yet unsupported, compression methods. 117 */ 118 119 #define CI_PREDICTOR_1 1 /* config option for Predictor-1 */ 120 #define CILEN_PREDICTOR_1 2 /* length of its config option */ 121 #define CI_PREDICTOR_2 2 /* config option for Predictor-2 */ 122 #define CILEN_PREDICTOR_2 2 /* length of its config option */ 123 #endif /* PREDICTOR_SUPPORT */ 124 125 typedef struct ccp_options { 126 #if DEFLATE_SUPPORT 127 unsigned int deflate :1; /* do Deflate? */ 128 unsigned int deflate_correct :1; /* use correct code for deflate? */ 129 unsigned int deflate_draft :1; /* use draft RFC code for deflate? */ 130 #endif /* DEFLATE_SUPPORT */ 131 #if BSDCOMPRESS_SUPPORT 132 unsigned int bsd_compress :1; /* do BSD Compress? */ 133 #endif /* BSDCOMPRESS_SUPPORT */ 134 #if PREDICTOR_SUPPORT 135 unsigned int predictor_1 :1; /* do Predictor-1? */ 136 unsigned int predictor_2 :1; /* do Predictor-2? */ 137 #endif /* PREDICTOR_SUPPORT */ 138 139 #if MPPE_SUPPORT 140 u8_t mppe; /* MPPE bitfield */ 141 #endif /* MPPE_SUPPORT */ 142 #if BSDCOMPRESS_SUPPORT 143 u_short bsd_bits; /* # bits/code for BSD Compress */ 144 #endif /* BSDCOMPRESS_SUPPORT */ 145 #if DEFLATE_SUPPORT 146 u_short deflate_size; /* lg(window size) for Deflate */ 147 #endif /* DEFLATE_SUPPORT */ 148 u8_t method; /* code for chosen compression method */ 149 } ccp_options; 150 151 extern const struct protent ccp_protent; 152 153 void ccp_resetrequest(ppp_pcb *pcb); /* Issue a reset-request. */ 154 155 #endif /* CCP_H */ 156 #endif /* PPP_SUPPORT && CCP_SUPPORT */ 157