Keil Studio Cloud
Mistake on this page?
Report an issue in GitHub or email us
ccp.h
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 "ppp_opts.h"
34 #if PPP_SUPPORT && CCP_SUPPORT /* don't build if not configured for use in ppp_opts.h */
35 
36 #ifndef CCP_H
37 #define CCP_H
38 
39 #ifdef __cplusplus
40 extern "C" {
41 #endif
42 
43 /*
44  * CCP codes.
45  */
46 
47 #define CCP_CONFREQ 1
48 #define CCP_CONFACK 2
49 #define CCP_TERMREQ 5
50 #define CCP_TERMACK 6
51 #define CCP_RESETREQ 14
52 #define CCP_RESETACK 15
53 
54 /*
55  * Max # bytes for a CCP option
56  */
57 
58 #define CCP_MAX_OPTION_LENGTH 32
59 
60 /*
61  * Parts of a CCP packet.
62  */
63 
64 #define CCP_CODE(dp) ((dp)[0])
65 #define CCP_ID(dp) ((dp)[1])
66 #define CCP_LENGTH(dp) (((dp)[2] << 8) + (dp)[3])
67 #define CCP_HDRLEN 4
68 
69 #define CCP_OPT_CODE(dp) ((dp)[0])
70 #define CCP_OPT_LENGTH(dp) ((dp)[1])
71 #define CCP_OPT_MINLEN 2
72 
73 #if BSDCOMPRESS_SUPPORT
74 /*
75  * Definitions for BSD-Compress.
76  */
77 
78 #define CI_BSD_COMPRESS 21 /* config. option for BSD-Compress */
79 #define CILEN_BSD_COMPRESS 3 /* length of config. option */
80 
81 /* Macros for handling the 3rd byte of the BSD-Compress config option. */
82 #define BSD_NBITS(x) ((x) & 0x1F) /* number of bits requested */
83 #define BSD_VERSION(x) ((x) >> 5) /* version of option format */
84 #define BSD_CURRENT_VERSION 1 /* current version number */
85 #define BSD_MAKE_OPT(v, n) (((v) << 5) | (n))
86 
87 #define BSD_MIN_BITS 9 /* smallest code size supported */
88 #define BSD_MAX_BITS 15 /* largest code size supported */
89 #endif /* BSDCOMPRESS_SUPPORT */
90 
91 #if DEFLATE_SUPPORT
92 /*
93  * Definitions for Deflate.
94  */
95 
96 #define CI_DEFLATE 26 /* config option for Deflate */
97 #define CI_DEFLATE_DRAFT 24 /* value used in original draft RFC */
98 #define CILEN_DEFLATE 4 /* length of its config option */
99 
100 #define DEFLATE_MIN_SIZE 9
101 #define DEFLATE_MAX_SIZE 15
102 #define DEFLATE_METHOD_VAL 8
103 #define DEFLATE_SIZE(x) (((x) >> 4) + 8)
104 #define DEFLATE_METHOD(x) ((x) & 0x0F)
105 #define DEFLATE_MAKE_OPT(w) ((((w) - 8) << 4) + DEFLATE_METHOD_VAL)
106 #define DEFLATE_CHK_SEQUENCE 0
107 #endif /* DEFLATE_SUPPORT */
108 
109 #if MPPE_SUPPORT
110 /*
111  * Definitions for MPPE.
112  */
113 
114 #define CI_MPPE 18 /* config option for MPPE */
115 #define CILEN_MPPE 6 /* length of config option */
116 #endif /* MPPE_SUPPORT */
117 
118 #if PREDICTOR_SUPPORT
119 /*
120  * Definitions for other, as yet unsupported, compression methods.
121  */
122 
123 #define CI_PREDICTOR_1 1 /* config option for Predictor-1 */
124 #define CILEN_PREDICTOR_1 2 /* length of its config option */
125 #define CI_PREDICTOR_2 2 /* config option for Predictor-2 */
126 #define CILEN_PREDICTOR_2 2 /* length of its config option */
127 #endif /* PREDICTOR_SUPPORT */
128 
129 typedef struct ccp_options {
130 #if DEFLATE_SUPPORT
131  unsigned int deflate :1; /* do Deflate? */
132  unsigned int deflate_correct :1; /* use correct code for deflate? */
133  unsigned int deflate_draft :1; /* use draft RFC code for deflate? */
134 #endif /* DEFLATE_SUPPORT */
135 #if BSDCOMPRESS_SUPPORT
136  unsigned int bsd_compress :1; /* do BSD Compress? */
137 #endif /* BSDCOMPRESS_SUPPORT */
138 #if PREDICTOR_SUPPORT
139  unsigned int predictor_1 :1; /* do Predictor-1? */
140  unsigned int predictor_2 :1; /* do Predictor-2? */
141 #endif /* PREDICTOR_SUPPORT */
142 
143 #if MPPE_SUPPORT
144  u8_t mppe; /* MPPE bitfield */
145 #endif /* MPPE_SUPPORT */
146 #if BSDCOMPRESS_SUPPORT
147  u_short bsd_bits; /* # bits/code for BSD Compress */
148 #endif /* BSDCOMPRESS_SUPPORT */
149 #if DEFLATE_SUPPORT
150  u_short deflate_size; /* lg(window size) for Deflate */
151 #endif /* DEFLATE_SUPPORT */
152  u8_t method; /* code for chosen compression method */
153 } ccp_options;
154 
155 extern const struct protent ccp_protent;
156 
157 void ccp_resetrequest(ppp_pcb *pcb); /* Issue a reset-request. */
158 
159 #ifdef __cplusplus
160 }
161 #endif
162 
163 #endif /* CCP_H */
164 #endif /* PPP_SUPPORT && CCP_SUPPORT */
Important Information for this Arm website

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies. If you are not happy with the use of these cookies, please review our Cookie Policy to learn how they can be disabled. By disabling cookies, some features of the site will not work.