libexec/pppd/lcp.h

/*
 * lcp.h - Link Control Protocol definitions.
 *
 * Copyright (c) 1989 Carnegie Mellon University.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by Carnegie Mellon University.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

/*
 * Options.
 */
#define CI_MRU          1       /* Maximum Receive Unit */
#define CI_ASYNCMAP     2       /* Async Control Character Map */
#define CI_AUTHTYPE     3       /* Authentication Type */
#define CI_NOTDEFINED   4       /* not defined (used to be Encryption Type) */
#define CI_MAGICNUMBER  5       /* Magic Number */
#define CI_KEEPALIVE    6       /* Keep Alive Parameters */
#define CI_PCOMPRESSION 7       /* Protocol Field Compression */
#define CI_ACCOMPRESSION 8      /* Address/Control Field Compression */


/*
 * The state of options is described by an lcp_options structure.
 */
typedef struct lcp_options {
    int passive : 1;            /* Passives vs. active open */
    int restart : 1;            /* Restart vs. exit after close */
    int neg_mru : 1;            /* Negotiate the MRU? */
    u_short mru;                /* Value of MRU */
    int neg_asyncmap : 1;       /* Async map? */
    u_long asyncmap;
    int neg_upap : 1;           /* UPAP authentication? */
    int neg_chap : 1;           /* CHAP authentication? */
    char chap_mdtype;           /* which MD type */
    char chap_callback;         /* callback ? */
    int neg_magicnumber : 1;    /* Magic number? */
    u_long magicnumber;
    int numloops;               /* Number loops during magic number negot. */
    int neg_pcompression : 1;   /* HDLC Protocol Field Compression? */
    int neg_accompression : 1;  /* HDLC Address/Control Field Compression? */
} lcp_options;

extern fsm lcp_fsm[];
extern lcp_options lcp_wantoptions[];
extern lcp_options lcp_gotoptions[];
extern lcp_options lcp_allowoptions[];
extern lcp_options lcp_hisoptions[];

#define DEFMRU  1500            /* Try for this */
#define MINMRU  128             /* No MRUs below this */

void lcp_init __ARGS((int));
void lcp_activeopen __ARGS((int));
void lcp_passiveopen __ARGS((int));
void lcp_close __ARGS((int));
void lcp_lowerup __ARGS((int));
void lcp_lowerdown __ARGS((int));
void lcp_input __ARGS((int, u_char *, int));
void lcp_protrej __ARGS((int));
void lcp_sprotrej __ARGS((int, u_char *, int));