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 fsm_opt *, const struct ccp_config *);
131 void *(*Init)(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 fsm_opt *, const struct ccp_config *);
140 int (*Set)(struct fsm_opt *, const struct ccp_config *);
141 void *(*Init)(struct fsm_opt *);
142 void (*Term)(void *);
143 int (*Reset)(void *);
144 struct mbuf *(*Write)(void *, struct ccp *, struct link *, int, u_short *,
149 extern void ccp_Init(struct ccp *, struct bundle *, struct link *,
150 const struct fsm_parent *);
151 extern void ccp_Setup(struct ccp *);
152 extern int ccp_Required(struct ccp *);
153 extern int ccp_MTUOverhead(struct ccp *);
155 extern void ccp_SendResetReq(struct fsm *);
156 extern struct mbuf *ccp_Input(struct bundle *, struct link *, struct mbuf *);
157 extern int ccp_ReportStatus(struct cmdargs const *);
158 extern u_short ccp_Proto(struct ccp *);
159 extern void ccp_SetupCallbacks(struct ccp *);
160 extern int ccp_SetOpenMode(struct ccp *);
161 extern int ccp_DefaultUsable(struct fsm *);
162 extern int ccp_DefaultRequired(struct fsm *);
164 extern struct layer ccplayer;