1 /* 2 * Written by Toshiharu OHNO (tony-o@iij.ad.jp) 3 * 4 * Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd. 5 * 6 * Redistribution and use in source and binary forms are permitted 7 * provided that the above copyright notice and this paragraph are 8 * duplicated in all such forms and that any documentation, 9 * advertising materials, and other materials related to such 10 * distribution and use acknowledge that the software was developed 11 * by the Internet Initiative Japan. The name of the 12 * IIJ may not be used to endorse or promote products derived 13 * from this software without specific prior written permission. 14 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 16 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 17 * 18 * $FreeBSD$ 19 * 20 * TODO: 21 */ 22 23 #define CCP_MAXCODE CODE_RESETACK 24 25 #define TY_OUI 0 /* OUI */ 26 #define TY_PRED1 1 /* Predictor type 1 */ 27 #define TY_PRED2 2 /* Predictor type 2 */ 28 #define TY_PUDDLE 3 /* Puddle Jumper */ 29 #define TY_HWPPC 16 /* Hewlett-Packard PPC */ 30 #define TY_STAC 17 /* Stac Electronics LZS */ 31 #define TY_MSPPC 18 /* Microsoft PPC */ 32 #define TY_GAND 19 /* Gandalf FZA */ 33 #define TY_V42BIS 20 /* V.42bis compression */ 34 #define TY_BSD 21 /* BSD LZW Compress */ 35 #define TY_PPPD_DEFLATE 24 /* Deflate (gzip) - (mis) numbered by pppd */ 36 #define TY_DEFLATE 26 /* Deflate (gzip) - rfc 1979 */ 37 38 #define CCP_NEG_DEFLATE 0 39 #define CCP_NEG_PRED1 1 40 #define CCP_NEG_DEFLATE24 2 41 #define CCP_NEG_TOTAL 3 42 43 struct mbuf; 44 struct link; 45 46 struct ccp_config { 47 struct { 48 struct { 49 int winsize; 50 } in, out; 51 } deflate; 52 struct fsm_retry fsm; /* How often/frequently to resend requests */ 53 unsigned neg[CCP_NEG_TOTAL]; 54 }; 55 56 struct ccp_opt { 57 struct ccp_opt *next; 58 int algorithm; 59 struct lcp_opt val; 60 }; 61 62 struct ccp { 63 struct fsm fsm; /* The finite state machine */ 64 65 int his_proto; /* peer's compression protocol */ 66 int my_proto; /* our compression protocol */ 67 68 int reset_sent; /* If != -1, ignore compressed 'till ack */ 69 int last_reset; /* We can receive more (dups) w/ this id */ 70 71 struct { 72 int algorithm; /* Algorithm in use */ 73 void *state; /* Returned by implementations Init() */ 74 struct lcp_opt opt; /* Set by implementations OptInit() */ 75 } in; 76 77 struct { 78 int algorithm; /* Algorithm in use */ 79 void *state; /* Returned by implementations Init() */ 80 struct ccp_opt *opt; /* Set by implementations OptInit() */ 81 } out; 82 83 u_int32_t his_reject; /* Request codes rejected by peer */ 84 u_int32_t my_reject; /* Request codes I have rejected */ 85 86 u_long uncompout, compout; /* Outgoing bytes before/after compression */ 87 u_long uncompin, compin; /* Incoming bytes after/before decompression */ 88 89 struct ccp_config cfg; 90 }; 91 92 #define fsm2ccp(fp) (fp->proto == PROTO_CCP ? (struct ccp *)fp : NULL) 93 94 struct ccp_algorithm { 95 int id; 96 int Neg; /* ccp_config neg array item */ 97 const char *(*Disp)(struct lcp_opt *); /* Use result immediately ! */ 98 struct { 99 int (*Set)(struct lcp_opt *, const struct ccp_config *); 100 void *(*Init)(struct lcp_opt *); 101 void (*Term)(void *); 102 void (*Reset)(void *); 103 struct mbuf *(*Read)(void *, struct ccp *, u_short *, struct mbuf *); 104 void (*DictSetup)(void *, struct ccp *, u_short, struct mbuf *); 105 } i; 106 struct { 107 void (*OptInit)(struct lcp_opt *, const struct ccp_config *); 108 int (*Set)(struct lcp_opt *); 109 void *(*Init)(struct lcp_opt *); 110 void (*Term)(void *); 111 void (*Reset)(void *); 112 struct mbuf *(*Write)(void *, struct ccp *, struct link *, int, u_short *, 113 struct mbuf *); 114 } o; 115 }; 116 117 extern void ccp_Init(struct ccp *, struct bundle *, struct link *, 118 const struct fsm_parent *); 119 extern void ccp_Setup(struct ccp *); 120 121 extern void ccp_SendResetReq(struct fsm *); 122 extern struct mbuf *ccp_Input(struct bundle *, struct link *, struct mbuf *); 123 extern int ccp_ReportStatus(struct cmdargs const *); 124 extern u_short ccp_Proto(struct ccp *); 125 extern void ccp_SetupCallbacks(struct ccp *); 126 extern int ccp_SetOpenMode(struct ccp *); 127 128 extern struct layer ccplayer; 129