pppd/lcp.h

   1 /*
   2  * lcp.h - Link Control Protocol definitions.
   3  *
   4  * Copyright (c) 1989 Carnegie Mellon University.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms are permitted
   8  * provided that the above copyright notice and this paragraph are
   9  * duplicated in all such forms and that any documentation,
  10  * advertising materials, and other materials related to such
  11  * distribution and use acknowledge that the software was developed
  12  * by Carnegie Mellon University.  The name of the
  13  * University may not be used to endorse or promote products derived
  14  * from this software without specific prior written permission.
  15  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  17  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  18  *
  19  * $Id: lcp.h,v 1.12 1996/10/08 04:35:02 paulus Exp $
  20  */
  21
  22 /*
  23  * Options.
  24  */
  25 #define CI_MRU          1       /* Maximum Receive Unit */
  26 #define CI_ASYNCMAP     2       /* Async Control Character Map */
  27 #define CI_AUTHTYPE     3       /* Authentication Type */
  28 #define CI_QUALITY      4       /* Quality Protocol */
  29 #define CI_MAGICNUMBER  5       /* Magic Number */
  30 #define CI_PCOMPRESSION 7       /* Protocol Field Compression */
  31 #define CI_ACCOMPRESSION 8      /* Address/Control Field Compression */
  32 #define CI_CALLBACK     13      /* callback */
  33
  34 /*
  35  * LCP-specific packet types.
  36  */
  37 #define PROTREJ         8       /* Protocol Reject */
  38 #define ECHOREQ         9       /* Echo Request */
  39 #define ECHOREP         10      /* Echo Reply */
  40 #define DISCREQ         11      /* Discard Request */
  41 #define CBCP_OPT        6       /* Use callback control protocol */
  42
  43 /*
  44  * The state of options is described by an lcp_options structure.
  45  */
  46 typedef struct lcp_options {
  47     int passive : 1;            /* Don't die if we don't get a response */
  48     int silent : 1;             /* Wait for the other end to start first */
  49     int restart : 1;            /* Restart vs. exit after close */
  50     int neg_mru : 1;            /* Negotiate the MRU? */
  51     int neg_asyncmap : 1;       /* Negotiate the async map? */
  52     int neg_upap : 1;           /* Ask for UPAP authentication? */
  53     int neg_chap : 1;           /* Ask for CHAP authentication? */
  54     int neg_magicnumber : 1;    /* Ask for magic number? */
  55     int neg_pcompression : 1;   /* HDLC Protocol Field Compression? */
  56     int neg_accompression : 1;  /* HDLC Address/Control Field Compression? */
  57     int neg_lqr : 1;            /* Negotiate use of Link Quality Reports */
  58     int neg_cbcp : 1;           /* Negotiate use of CBCP */
  59     u_short mru;                /* Value of MRU */
  60     u_char chap_mdtype;         /* which MD type (hashing algorithm) */
  61     u_int32_t asyncmap;         /* Value of async map */
  62     u_int32_t magicnumber;
  63     int numloops;               /* Number of loops during magic number neg. */
  64     u_int32_t lqr_period;       /* Reporting period for LQR 1/100ths second */
  65 } lcp_options;
  66
  67 extern fsm lcp_fsm[];
  68 extern lcp_options lcp_wantoptions[];
  69 extern lcp_options lcp_gotoptions[];
  70 extern lcp_options lcp_allowoptions[];
  71 extern lcp_options lcp_hisoptions[];
  72 extern u_int32_t xmit_accm[][8];
  73
  74 #define DEFMRU  1500            /* Try for this */
  75 #define MINMRU  128             /* No MRUs below this */
  76 #define MAXMRU  16384           /* Normally limit MRU to this */
  77
  78 void lcp_open __P((int));
  79 void lcp_close __P((int, char *));
  80 void lcp_lowerup __P((int));
  81 void lcp_lowerdown __P((int));
  82 void lcp_sprotrej __P((int, u_char *, int));    /* send protocol reject */
  83
  84 extern struct protent lcp_protent;
  85
  86 /* Default number of times we receive our magic number from the peer
  87    before deciding the link is looped-back. */
  88 #define DEFLOOPBACKFAIL 10