mirror of
https://github.com/freebsd/freebsd-src
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166 lines
5.5 KiB
C
166 lines
5.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
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* based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
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* Internet Initiative Japan, Inc (IIJ)
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#define CCP_MAXCODE CODE_RESETACK
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#define TY_OUI 0 /* OUI */
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#define TY_PRED1 1 /* Predictor type 1 */
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#define TY_PRED2 2 /* Predictor type 2 */
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#define TY_PUDDLE 3 /* Puddle Jumper */
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#define TY_HWPPC 16 /* Hewlett-Packard PPC */
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#define TY_STAC 17 /* Stac Electronics LZS */
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#define TY_MSPPC 18 /* Microsoft PPC */
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#define TY_MPPE 18 /* Microsoft PPE */
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#define TY_GAND 19 /* Gandalf FZA */
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#define TY_V42BIS 20 /* V.42bis compression */
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#define TY_BSD 21 /* BSD LZW Compress */
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#define TY_PPPD_DEFLATE 24 /* Deflate (gzip) - (mis) numbered by pppd */
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#define TY_DEFLATE 26 /* Deflate (gzip) - rfc 1979 */
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#define CCP_NEG_DEFLATE 0
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#define CCP_NEG_PRED1 1
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#define CCP_NEG_DEFLATE24 2
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#ifndef NODES
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#define CCP_NEG_MPPE 3
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#define CCP_NEG_TOTAL 4
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#else
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#define CCP_NEG_TOTAL 3
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#endif
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#ifndef NODES
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enum mppe_negstate {
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MPPE_ANYSTATE,
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MPPE_STATELESS,
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MPPE_STATEFUL
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};
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#endif
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struct mbuf;
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struct link;
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struct ccp_config {
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struct {
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struct {
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int winsize;
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} in, out;
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} deflate;
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#ifndef NODES
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struct {
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int keybits;
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enum mppe_negstate state;
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unsigned required : 1;
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} mppe;
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#endif
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struct fsm_retry fsm; /* How often/frequently to resend requests */
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unsigned neg[CCP_NEG_TOTAL];
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};
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struct ccp_opt {
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struct ccp_opt *next;
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int algorithm;
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struct fsm_opt val;
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};
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struct ccp {
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struct fsm fsm; /* The finite state machine */
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int his_proto; /* peer's compression protocol */
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int my_proto; /* our compression protocol */
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int reset_sent; /* If != -1, ignore compressed 'till ack */
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int last_reset; /* We can receive more (dups) w/ this id */
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struct {
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int algorithm; /* Algorithm in use */
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void *state; /* Returned by implementations Init() */
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struct fsm_opt opt; /* Set by implementation's OptInit() */
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} in;
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struct {
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int algorithm; /* Algorithm in use */
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void *state; /* Returned by implementations Init() */
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struct ccp_opt *opt; /* Set by implementation's OptInit() */
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} out;
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u_int32_t his_reject; /* Request codes rejected by peer */
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u_int32_t my_reject; /* Request codes I have rejected */
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u_long uncompout, compout; /* Outgoing bytes before/after compression */
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u_long uncompin, compin; /* Incoming bytes after/before decompression */
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struct ccp_config cfg;
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};
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#define fsm2ccp(fp) (fp->proto == PROTO_CCP ? (struct ccp *)fp : NULL)
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struct ccp_algorithm {
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int id;
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int Neg; /* ccp_config neg array item */
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const char *(*Disp)(struct fsm_opt *); /* Use result immediately ! */
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int (*Usable)(struct fsm *); /* Ok to negotiate ? */
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int (*Required)(struct fsm *); /* Must negotiate ? */
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struct {
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int (*Set)(struct bundle *, struct fsm_opt *, const struct ccp_config *);
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void *(*Init)(struct bundle *, struct fsm_opt *);
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void (*Term)(void *);
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void (*Reset)(void *);
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struct mbuf *(*Read)(void *, struct ccp *, u_short *, struct mbuf *);
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void (*DictSetup)(void *, struct ccp *, u_short, struct mbuf *);
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} i;
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struct {
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int MTUOverhead;
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void (*OptInit)(struct bundle *, struct fsm_opt *,
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const struct ccp_config *);
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int (*Set)(struct bundle *, struct fsm_opt *, const struct ccp_config *);
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void *(*Init)(struct bundle *, struct fsm_opt *);
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void (*Term)(void *);
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int (*Reset)(void *);
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struct mbuf *(*Write)(void *, struct ccp *, struct link *, int, u_short *,
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struct mbuf *);
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} o;
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};
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extern void ccp_Init(struct ccp *, struct bundle *, struct link *,
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const struct fsm_parent *);
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extern void ccp_Setup(struct ccp *);
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extern int ccp_Required(struct ccp *);
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extern int ccp_MTUOverhead(struct ccp *);
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extern void ccp_SendResetReq(struct fsm *);
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extern struct mbuf *ccp_Input(struct bundle *, struct link *, struct mbuf *);
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extern int ccp_ReportStatus(struct cmdargs const *);
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extern u_short ccp_Proto(struct ccp *);
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extern void ccp_SetupCallbacks(struct ccp *);
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extern int ccp_SetOpenMode(struct ccp *);
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extern int ccp_DefaultUsable(struct fsm *);
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extern int ccp_DefaultRequired(struct fsm *);
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extern struct layer ccplayer;
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