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      1 /*-
      2  * Copyright (c) 1998 Brian Somers <brian (at) Awfulhak.org>
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     24  * SUCH DAMAGE.
     25  *
     26  * $FreeBSD: src/usr.sbin/ppp/datalink.h,v 1.16.26.1 2010/12/21 17:10:29 kensmith Exp $
     27  */
     28 
     29 #define DATALINK_CLOSED  (0)
     30 #define DATALINK_OPENING (1)
     31 #define DATALINK_HANGUP  (2)
     32 #define DATALINK_DIAL    (3)
     33 #define DATALINK_CARRIER (4)
     34 #define DATALINK_LOGOUT  (5)
     35 #define DATALINK_LOGIN   (6)
     36 #define DATALINK_READY   (7)
     37 #define DATALINK_LCP     (8)
     38 #define DATALINK_AUTH    (9)
     39 #define DATALINK_CBCP    (10)
     40 #define DATALINK_OPEN    (11)
     41 
     42 #define DATALINK_MAXNAME (20)   /* Maximum datalink::name length */
     43 
     44 /* How to close the link */
     45 #define CLOSE_NORMAL		0
     46 #define CLOSE_STAYDOWN		1
     47 #define CLOSE_LCP		2
     48 
     49 struct iovec;
     50 struct prompt;
     51 struct physical;
     52 struct bundle;
     53 
     54 struct datalink {
     55   struct fdescriptor desc;	/* We play either a physical or a chat */
     56   unsigned state;		/* Our DATALINK_* state */
     57   struct physical *physical;	/* Our link */
     58 
     59   struct chat chat;		/* For bringing the link up & down */
     60 
     61   unsigned stayonline : 1;	/* stay online when LCP is closed ? */
     62   struct {
     63     unsigned run : 1;		/* run scripts ? */
     64     unsigned packetmode : 1;	/* Go into packet mode after login ? */
     65   } script;
     66 
     67   struct {
     68     struct {
     69       char dial[SCRIPT_LEN];
     70       char login[SCRIPT_LEN];
     71       char logout[SCRIPT_LEN];
     72       char hangup[SCRIPT_LEN];
     73     } script;			/* various chat scripts */
     74     struct {
     75       char list[SCRIPT_LEN];	/* Telephone Numbers */
     76     } phone;
     77     struct {
     78       int max;			/* initially try again this number of times */
     79       int next_timeout;		/* Redial next timeout value */
     80       int inc;			/* Increment timeout by `inc' each time read */
     81       int maxinc;		/* Maximum number of increments */
     82       int timeout;		/* Redial timeout value (end of phone list) */
     83     } dial;
     84     struct {
     85       int max;			/* initially try again this number of times */
     86       int timeout;		/* Timeout before reconnect on carrier loss */
     87     } reconnect;
     88     struct callback callback;	/* Direction depends on physical type */
     89     struct cbcpcfg cbcp;	/* Direction depends on phys type & callback */
     90   } cfg;			/* All our config data is in here */
     91 
     92   struct {
     93     char list[SCRIPT_LEN];	/* copy of cfg.list for strsep() */
     94     char *next;			/* Next phone from the list */
     95     char *alt;			/* Alternate (after fail) phone from the list */
     96     const char *chosen;		/* Chosen phone number after DIAL */
     97   } phone;
     98 
     99   struct cbcp cbcp;
    100 
    101   struct {
    102     struct pppTimer timer;	/* For timing between close & open */
    103     int tries;			/* currently try again this number of times */
    104     int incs;			/* # times our timeout has been incremented */
    105   } dial;
    106 
    107   unsigned reconnect_tries;	/* currently try again this number of times */
    108 
    109   char *name;			/* Our name */
    110 
    111   struct peerid peer;		/* Peer identification */
    112 
    113   struct fsm_parent fsmp;	   /* Our callback functions */
    114   const struct fsm_parent *parent; /* Our parent */
    115 
    116   struct authinfo pap;             /* Authentication using pap */
    117   struct chap chap;                /* Authentication using chap */
    118 
    119   struct mp_link mp;               /* multilink data */
    120 
    121   struct bundle *bundle;	   /* for the moment */
    122   struct datalink *next;	   /* Next in the list */
    123 };
    124 
    125 #define descriptor2datalink(d) \
    126   ((d)->type == DATALINK_DESCRIPTOR ? (struct datalink *)(d) : NULL)
    127 
    128 extern struct datalink *datalink_Create(const char *name, struct bundle *, int);
    129 extern struct datalink *datalink_Clone(struct datalink *, const char *);
    130 extern struct datalink *iov2datalink(struct bundle *, struct iovec *, int *,
    131                                      int, int, int *, int *);
    132 extern int datalink2iov(struct datalink *, struct iovec *, int *, int, int *,
    133                         int *);
    134 extern struct datalink *datalink_Destroy(struct datalink *);
    135 extern void datalink_GotAuthname(struct datalink *, const char *);
    136 extern void datalink_Up(struct datalink *, int, int);
    137 extern void datalink_Close(struct datalink *, int);
    138 extern void datalink_Down(struct datalink *, int);
    139 extern void datalink_StayDown(struct datalink *);
    140 extern void datalink_DontHangup(struct datalink *);
    141 extern void datalink_AuthOk(struct datalink *);
    142 extern void datalink_AuthNotOk(struct datalink *);
    143 extern void datalink_NCPUp(struct datalink *);
    144 extern void datalink_CBCPComplete(struct datalink *);
    145 extern void datalink_CBCPFailed(struct datalink *);
    146 extern int datalink_Show(struct cmdargs const *);
    147 extern int datalink_SetRedial(struct cmdargs const *);
    148 extern int datalink_SetReconnect(struct cmdargs const *);
    149 extern const char *datalink_State(struct datalink *);
    150 extern void datalink_Rename(struct datalink *, const char *);
    151 extern int datalink_RemoveFromSet(struct datalink *, fd_set *, fd_set *,
    152                                   fd_set *);
    153 extern int datalink_SetMode(struct datalink *, int);
    154 extern int datalink_GetDialTimeout(struct datalink *);
    155 extern const char *datalink_ChoosePhoneNumber(struct datalink *);
    156 extern void datalink_ComeDown(struct datalink *, int);
    157