/*- * 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;