minix/lib/liblwip/dist/src/include/netif/ppp/lcp.h

   1 /*
   2  * lcp.h - Link Control Protocol definitions.
   3  *
   4  * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  *
  18  * 3. The name "Carnegie Mellon University" must not be used to
  19  *    endorse or promote products derived from this software without
  20  *    prior written permission. For permission or any legal
  21  *    details, please contact
  22  *      Office of Technology Transfer
  23  *      Carnegie Mellon University
  24  *      5000 Forbes Avenue
  25  *      Pittsburgh, PA  15213-3890
  26  *      (412) 268-4387, fax: (412) 268-7395
  27  *      tech-transfer@andrew.cmu.edu
  28  *
  29  * 4. Redistributions of any form whatsoever must retain the following
  30  *    acknowledgment:
  31  *    "This product includes software developed by Computing Services
  32  *     at Carnegie Mellon University (http://www.cmu.edu/computing/)."
  33  *
  34  * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
  35  * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  36  * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
  37  * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  38  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
  39  * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  40  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  41  *
  42  * $Id: lcp.h,v 1.20 2004/11/14 22:53:42 carlsonj Exp $
  43  */
  44
  45 #include "netif/ppp/ppp_opts.h"
  46 #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
  47
  48 #ifndef LCP_H
  49 #define LCP_H
  50
  51 #include "ppp.h"
  52
  53 /*
  54  * Options.
  55  */
  56 #define CI_VENDOR       0       /* Vendor Specific */
  57 #define CI_MRU          1       /* Maximum Receive Unit */
  58 #define CI_ASYNCMAP     2       /* Async Control Character Map */
  59 #define CI_AUTHTYPE     3       /* Authentication Type */
  60 #define CI_QUALITY      4       /* Quality Protocol */
  61 #define CI_MAGICNUMBER  5       /* Magic Number */
  62 #define CI_PCOMPRESSION 7       /* Protocol Field Compression */
  63 #define CI_ACCOMPRESSION 8      /* Address/Control Field Compression */
  64 #define CI_FCSALTERN    9       /* FCS-Alternatives */
  65 #define CI_SDP          10      /* Self-Describing-Pad */
  66 #define CI_NUMBERED     11      /* Numbered-Mode */
  67 #define CI_CALLBACK     13      /* callback */
  68 #define CI_MRRU         17      /* max reconstructed receive unit; multilink */
  69 #define CI_SSNHF        18      /* short sequence numbers for multilink */
  70 #define CI_EPDISC       19      /* endpoint discriminator */
  71 #define CI_MPPLUS       22      /* Multi-Link-Plus-Procedure */
  72 #define CI_LDISC        23      /* Link-Discriminator */
  73 #define CI_LCPAUTH      24      /* LCP Authentication */
  74 #define CI_COBS         25      /* Consistent Overhead Byte Stuffing */
  75 #define CI_PREFELIS     26      /* Prefix Elision */
  76 #define CI_MPHDRFMT     27      /* MP Header Format */
  77 #define CI_I18N         28      /* Internationalization */
  78 #define CI_SDL          29      /* Simple Data Link */
  79
  80 /*
  81  * LCP-specific packet types (code numbers).
  82  */
  83 #define PROTREJ         8       /* Protocol Reject */
  84 #define ECHOREQ         9       /* Echo Request */
  85 #define ECHOREP         10      /* Echo Reply */
  86 #define DISCREQ         11      /* Discard Request */
  87 #define IDENTIF         12      /* Identification */
  88 #define TIMEREM         13      /* Time Remaining */
  89
  90 /* Value used as data for CI_CALLBACK option */
  91 #define CBCP_OPT        6       /* Use callback control protocol */
  92
  93 #if 0 /* moved to ppp_opts.h */
  94 #define DEFMRU  1500            /* Try for this */
  95 #define MINMRU  128             /* No MRUs below this */
  96 #define MAXMRU  16384           /* Normally limit MRU to this */
  97 #endif /* moved to ppp_opts.h */
  98
  99 /* An endpoint discriminator, used with multilink. */
 100 #define MAX_ENDP_LEN    20      /* maximum length of discriminator value */
 101 struct epdisc {
 102     unsigned char       class_; /* -- The word "class" is reserved in C++. */
 103     unsigned char       length;
 104     unsigned char       value[MAX_ENDP_LEN];
 105 };
 106
 107 /*
 108  * The state of options is described by an lcp_options structure.
 109  */
 110 typedef struct lcp_options {
 111     unsigned int passive           :1; /* Don't die if we don't get a response */
 112     unsigned int silent            :1; /* Wait for the other end to start first */
 113 #if 0 /* UNUSED */
 114     unsigned int restart           :1; /* Restart vs. exit after close */
 115 #endif /* UNUSED */
 116     unsigned int neg_mru           :1; /* Negotiate the MRU? */
 117     unsigned int neg_asyncmap      :1; /* Negotiate the async map? */
 118 #if PAP_SUPPORT
 119     unsigned int neg_upap          :1; /* Ask for UPAP authentication? */
 120 #endif /* PAP_SUPPORT */
 121 #if CHAP_SUPPORT
 122     unsigned int neg_chap          :1; /* Ask for CHAP authentication? */
 123 #endif /* CHAP_SUPPORT */
 124 #if EAP_SUPPORT
 125     unsigned int neg_eap           :1; /* Ask for EAP authentication? */
 126 #endif /* EAP_SUPPORT */
 127     unsigned int neg_magicnumber   :1; /* Ask for magic number? */
 128     unsigned int neg_pcompression  :1; /* HDLC Protocol Field Compression? */
 129     unsigned int neg_accompression :1; /* HDLC Address/Control Field Compression? */
 130 #if LQR_SUPPORT
 131     unsigned int neg_lqr           :1; /* Negotiate use of Link Quality Reports */
 132 #endif /* LQR_SUPPORT */
 133     unsigned int neg_cbcp          :1; /* Negotiate use of CBCP */
 134 #ifdef HAVE_MULTILINK
 135     unsigned int neg_mrru          :1; /* negotiate multilink MRRU */
 136 #endif /* HAVE_MULTILINK */
 137     unsigned int neg_ssnhf         :1; /* negotiate short sequence numbers */
 138     unsigned int neg_endpoint      :1; /* negotiate endpoint discriminator */
 139
 140     u16_t mru;                  /* Value of MRU */
 141 #ifdef HAVE_MULTILINK
 142     u16_t mrru;                 /* Value of MRRU, and multilink enable */
 143 #endif /* MULTILINK */
 144 #if CHAP_SUPPORT
 145     u8_t chap_mdtype;           /* which MD types (hashing algorithm) */
 146 #endif /* CHAP_SUPPORT */
 147     u32_t asyncmap;             /* Value of async map */
 148     u32_t magicnumber;
 149     u8_t  numloops;             /* Number of loops during magic number neg. */
 150 #if LQR_SUPPORT
 151     u32_t lqr_period;   /* Reporting period for LQR 1/100ths second */
 152 #endif /* LQR_SUPPORT */
 153     struct epdisc endpoint;     /* endpoint discriminator */
 154 } lcp_options;
 155
 156 void lcp_open(ppp_pcb *pcb);
 157 void lcp_close(ppp_pcb *pcb, const char *reason);
 158 void lcp_lowerup(ppp_pcb *pcb);
 159 void lcp_lowerdown(ppp_pcb *pcb);
 160 void lcp_sprotrej(ppp_pcb *pcb, u_char *p, int len);    /* send protocol reject */
 161
 162 extern const struct protent lcp_protent;
 163
 164 #if 0 /* moved to ppp_opts.h */
 165 /* Default number of times we receive our magic number from the peer
 166    before deciding the link is looped-back. */
 167 #define DEFLOOPBACKFAIL 10
 168 #endif /* moved to ppp_opts.h */
 169
 170 #endif /* LCP_H */
 171 #endif /* PPP_SUPPORT */