2 * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
3 * based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
4 * Internet Initiative Japan, Inc (IIJ)
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #define CCP_MAXCODE CODE_RESETACK
33 #define TY_OUI 0 /* OUI */
34 #define TY_PRED1 1 /* Predictor type 1 */
35 #define TY_PRED2 2 /* Predictor type 2 */
36 #define TY_PUDDLE 3 /* Puddle Jumper */
37 #define TY_HWPPC 16 /* Hewlett-Packard PPC */
38 #define TY_STAC 17 /* Stac Electronics LZS */
39 #define TY_MSPPC 18 /* Microsoft PPC */
40 #define TY_MPPE 18 /* Microsoft PPE */
41 #define TY_GAND 19 /* Gandalf FZA */
42 #define TY_V42BIS 20 /* V.42bis compression */
43 #define TY_BSD 21 /* BSD LZW Compress */
44 #define TY_PPPD_DEFLATE 24 /* Deflate (gzip) - (mis) numbered by pppd */
45 #define TY_DEFLATE 26 /* Deflate (gzip) - rfc 1979 */
47 #define CCP_NEG_DEFLATE 0
48 #define CCP_NEG_PRED1 1
49 #define CCP_NEG_DEFLATE24 2
51 #define CCP_NEG_MPPE 3
52 #define CCP_NEG_TOTAL 4
54 #define CCP_NEG_TOTAL 3
77 enum mppe_negstate state
;
78 unsigned required
: 1;
81 struct fsm_retry fsm
; /* How often/frequently to resend requests */
82 unsigned neg
[CCP_NEG_TOTAL
];
92 struct fsm fsm
; /* The finite state machine */
94 int his_proto
; /* peer's compression protocol */
95 int my_proto
; /* our compression protocol */
97 int reset_sent
; /* If != -1, ignore compressed 'till ack */
98 int last_reset
; /* We can receive more (dups) w/ this id */
101 int algorithm
; /* Algorithm in use */
102 void *state
; /* Returned by implementations Init() */
103 struct fsm_opt opt
; /* Set by implementation's OptInit() */
107 int algorithm
; /* Algorithm in use */
108 void *state
; /* Returned by implementations Init() */
109 struct ccp_opt
*opt
; /* Set by implementation's OptInit() */
112 u_int32_t his_reject
; /* Request codes rejected by peer */
113 u_int32_t my_reject
; /* Request codes I have rejected */
115 u_long uncompout
, compout
; /* Outgoing bytes before/after compression */
116 u_long uncompin
, compin
; /* Incoming bytes after/before decompression */
118 struct ccp_config cfg
;
121 #define fsm2ccp(fp) (fp->proto == PROTO_CCP ? (struct ccp *)fp : NULL)
123 struct ccp_algorithm
{
125 int Neg
; /* ccp_config neg array item */
126 const char *(*Disp
)(struct fsm_opt
*); /* Use result immediately ! */
127 int (*Usable
)(struct fsm
*); /* Ok to negotiate ? */
128 int (*Required
)(struct fsm
*); /* Must negotiate ? */
130 int (*Set
)(struct bundle
*, struct fsm_opt
*, const struct ccp_config
*);
131 void *(*Init
)(struct bundle
*, struct fsm_opt
*);
132 void (*Term
)(void *);
133 void (*Reset
)(void *);
134 struct mbuf
*(*Read
)(void *, struct ccp
*, u_short
*, struct mbuf
*);
135 void (*DictSetup
)(void *, struct ccp
*, u_short
, struct mbuf
*);
139 void (*OptInit
)(struct bundle
*, struct fsm_opt
*,
140 const struct ccp_config
*);
141 int (*Set
)(struct bundle
*, struct fsm_opt
*, const struct ccp_config
*);
142 void *(*Init
)(struct bundle
*, struct fsm_opt
*);
143 void (*Term
)(void *);
144 int (*Reset
)(void *);
145 struct mbuf
*(*Write
)(void *, struct ccp
*, struct link
*, int, u_short
*,
150 extern void ccp_Init(struct ccp
*, struct bundle
*, struct link
*,
151 const struct fsm_parent
*);
152 extern void ccp_Setup(struct ccp
*);
153 extern int ccp_Required(struct ccp
*);
154 extern int ccp_MTUOverhead(struct ccp
*);
156 extern void ccp_SendResetReq(struct fsm
*);
157 extern struct mbuf
*ccp_Input(struct bundle
*, struct link
*, struct mbuf
*);
158 extern int ccp_ReportStatus(struct cmdargs
const *);
159 extern u_short
ccp_Proto(struct ccp
*);
160 extern void ccp_SetupCallbacks(struct ccp
*);
161 extern int ccp_SetOpenMode(struct ccp
*);
162 extern int ccp_DefaultUsable(struct fsm
*);
163 extern int ccp_DefaultRequired(struct fsm
*);
165 extern struct layer ccplayer
;