summaryrefslogtreecommitdiffstats
path: root/usr.sbin/ppp/ccp.h
blob: bc867b63ddbb55a96c60292886f36580cf671aeb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
/*-
 * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
 *          based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
 *                           Internet Initiative Japan, Inc (IIJ)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 */

#define	CCP_MAXCODE	CODE_RESETACK

#define	TY_OUI		0	/* OUI */
#define	TY_PRED1	1	/* Predictor type 1 */
#define	TY_PRED2	2	/* Predictor type 2 */
#define	TY_PUDDLE	3	/* Puddle Jumper */
#define	TY_HWPPC	16	/* Hewlett-Packard PPC */
#define	TY_STAC		17	/* Stac Electronics LZS */
#define	TY_MSPPC	18	/* Microsoft PPC */
#define	TY_MPPE		18	/* Microsoft PPE */
#define	TY_GAND		19	/* Gandalf FZA */
#define	TY_V42BIS	20	/* V.42bis compression */
#define	TY_BSD		21	/* BSD LZW Compress */
#define	TY_PPPD_DEFLATE	24	/* Deflate (gzip) - (mis) numbered by pppd */
#define	TY_DEFLATE	26	/* Deflate (gzip) - rfc 1979 */

#define CCP_NEG_DEFLATE		0
#define CCP_NEG_PRED1		1
#define CCP_NEG_DEFLATE24	2
#ifndef NODES
#define CCP_NEG_MPPE		3
#define CCP_NEG_TOTAL		4
#else
#define CCP_NEG_TOTAL		3
#endif

#ifndef NODES
enum mppe_negstate {
  MPPE_ANYSTATE,
  MPPE_STATELESS,
  MPPE_STATEFUL
};
#endif

struct mbuf;
struct link;

struct ccp_config {
  struct {
    struct {
      int winsize;
    } in, out;
  } deflate;
#ifndef NODES
  struct {
    int keybits;
    enum mppe_negstate state;
    unsigned required : 1;
  } mppe;
#endif
  struct fsm_retry fsm;	/* How often/frequently to resend requests */
  unsigned neg[CCP_NEG_TOTAL];
};

struct ccp_opt {
  struct ccp_opt *next;
  int algorithm;
  struct fsm_opt val;
};

struct ccp {
  struct fsm fsm;		/* The finite state machine */

  int his_proto;		/* peer's compression protocol */
  int my_proto;			/* our compression protocol */

  int reset_sent;		/* If != -1, ignore compressed 'till ack */
  int last_reset;		/* We can receive more (dups) w/ this id */

  struct {
    int algorithm;		/* Algorithm in use */
    void *state;		/* Returned by implementations Init() */
    struct fsm_opt opt;		/* Set by implementation's OptInit() */
  } in;

  struct {
    int algorithm;		/* Algorithm in use */
    void *state;		/* Returned by implementations Init() */
    struct ccp_opt *opt;	/* Set by implementation's OptInit() */
  } out;

  u_int32_t his_reject;		/* Request codes rejected by peer */
  u_int32_t my_reject;		/* Request codes I have rejected */

  u_long uncompout, compout;	/* Outgoing bytes before/after compression */
  u_long uncompin, compin;	/* Incoming bytes after/before decompression */

  struct ccp_config cfg;
};

#define fsm2ccp(fp) (fp->proto == PROTO_CCP ? (struct ccp *)fp : NULL)

struct ccp_algorithm {
  int id;
  int Neg;					/* ccp_config neg array item */
  const char *(*Disp)(struct fsm_opt *);	/* Use result immediately !  */
  int (*Usable)(struct fsm *);			/* Ok to negotiate ? */
  int (*Required)(struct fsm *);		/* Must negotiate ? */
  struct {
    int (*Set)(struct bundle *, struct fsm_opt *, const struct ccp_config *);
    void *(*Init)(struct bundle *, struct fsm_opt *);
    void (*Term)(void *);
    void (*Reset)(void *);
    struct mbuf *(*Read)(void *, struct ccp *, u_short *, struct mbuf *);
    void (*DictSetup)(void *, struct ccp *, u_short, struct mbuf *);
  } i;
  struct {
    int MTUOverhead;
    void (*OptInit)(struct bundle *, struct fsm_opt *,
                    const struct ccp_config *);
    int (*Set)(struct bundle *, struct fsm_opt *, const struct ccp_config *);
    void *(*Init)(struct bundle *, struct fsm_opt *);
    void (*Term)(void *);
    int (*Reset)(void *);
    struct mbuf *(*Write)(void *, struct ccp *, struct link *, int, u_short *,
                          struct mbuf *);
  } o;
};

extern void ccp_Init(struct ccp *, struct bundle *, struct link *,
                     const struct fsm_parent *);
extern void ccp_Setup(struct ccp *);
extern int ccp_Required(struct ccp *);
extern int ccp_MTUOverhead(struct ccp *);

extern void ccp_SendResetReq(struct fsm *);
extern struct mbuf *ccp_Input(struct bundle *, struct link *, struct mbuf *);
extern int ccp_ReportStatus(struct cmdargs const *);
extern u_short ccp_Proto(struct ccp *);
extern void ccp_SetupCallbacks(struct ccp *);
extern int ccp_SetOpenMode(struct ccp *);
extern int ccp_DefaultUsable(struct fsm *);
extern int ccp_DefaultRequired(struct fsm *);

extern struct layer ccplayer;
OpenPOWER on IntegriCloud