1/*-
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)
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions

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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
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: head/usr.sbin/ppp/ccp.h 78411 2001-06-18 15:00:22Z brian $
29 */
30
31#define CCP_MAXCODE CODE_RESETACK
32
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 */

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49#define CCP_NEG_DEFLATE24 2
50#ifdef HAVE_DES
51#define CCP_NEG_MPPE 3
52#define CCP_NEG_TOTAL 4
53#else
54#define CCP_NEG_TOTAL 3
55#endif
56
57#ifdef HAVE_DES
58enum mppe_negstate {
59 MPPE_ANYSTATE,
60 MPPE_STATELESS,
61 MPPE_STATEFUL
62};
63#endif
64
65struct mbuf;
66struct link;
67
68struct ccp_config {
69 struct {
70 struct {
71 int winsize;
72 } in, out;
73 } deflate;
74#ifdef HAVE_DES
75 struct {
76 int keybits;
77 enum mppe_negstate state;
78 unsigned required : 1;
79 } mppe;
80#endif
81 struct fsm_retry fsm; /* How often/frequently to resend requests */
82 unsigned neg[CCP_NEG_TOTAL];
83};
84
85struct ccp_opt {
86 struct ccp_opt *next;

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120
121#define fsm2ccp(fp) (fp->proto == PROTO_CCP ? (struct ccp *)fp : NULL)
122
123struct ccp_algorithm {
124 int id;
125 int Neg; /* ccp_config neg array item */
126 const char *(*Disp)(struct lcp_opt *); /* Use result immediately ! */
127 int (*Usable)(struct fsm *); /* Ok to negotiate ? */
128 int (*Required)(struct fsm *); /* Must negotiate ? */
129 struct {
130 int (*Set)(struct lcp_opt *, const struct ccp_config *);
131 void *(*Init)(struct lcp_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 *);
136 } i;
137 struct {
138 void (*OptInit)(struct lcp_opt *, const struct ccp_config *);
139 int (*Set)(struct lcp_opt *, const struct ccp_config *);
140 void *(*Init)(struct lcp_opt *);
141 void (*Term)(void *);
142 int (*Reset)(void *);
143 struct mbuf *(*Write)(void *, struct ccp *, struct link *, int, u_short *,
144 struct mbuf *);
145 } o;
146};
147
148extern void ccp_Init(struct ccp *, struct bundle *, struct link *,
149 const struct fsm_parent *);
150extern void ccp_Setup(struct ccp *);
151extern int ccp_Required(struct ccp *);
152
153extern void ccp_SendResetReq(struct fsm *);
154extern struct mbuf *ccp_Input(struct bundle *, struct link *, struct mbuf *);
155extern int ccp_ReportStatus(struct cmdargs const *);
156extern u_short ccp_Proto(struct ccp *);
157extern void ccp_SetupCallbacks(struct ccp *);
158extern int ccp_SetOpenMode(struct ccp *);
159extern int ccp_DefaultUsable(struct fsm *);
160extern int ccp_DefaultRequired(struct fsm *);
161
162extern struct layer ccplayer;