lcp.h

在ARM7和UC/OSII的平台上实现了GPS自动报站的功能,涉及GPS模块LEA_4S的驱动,位置速寻算法,语音芯片ISD4004的录放音驱动,LED页面管理等等.从启动代码到操作系统的移植以及到业

/*
 * FILENAME: lcp.h
 *
 * Copyright 1997- 2000 By InterNiche Technologies Inc. All rights reserved
 *
 * Link Control Protocol definitions.
 *
 * MODULE: PPP
 *
 * PORTABLE: yes
 */

/* Additional Copyrights: */
/* Portions Copyright 1996 by NetPort Software. 
 * Portions 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.
 */

#ifndef _LCP_H
#define  _LCP_H   1

/*
 * Options.
 */
#define  CI_MRU            1  /* Maximum Receive Unit */
#define  CI_ASYNCMAP       2  /* Async Control Character Map */
#define  CI_AUTHTYPE       3  /* Authentication Type */
#define  CI_QUALITY        4  /* Quality Protocol */
#define  CI_MAGICNUMBER    5  /* Magic Number */
#define  CI_KEEPALIVE      6  /* Keep Alive Parameters - OBSOLETE */
#define  CI_PCOMPRESSION   7  /* Protocol Field Compression */
#define  CI_ACCOMPRESSION  8  /* Address/Control Field Compression */

#define  CI_ML_MRU         17 /* Multilink MRU option */
#define  CI_ML_SSN         18 /* Multilink Short Sequence Numbers */
#define  CI_ML_ENDP        19 /* Multilink Endpoint ID */

#define  CI_LCP_MAX        19 /* MAX legal value for LCP CI */

/*
 * The state of options is described by an lcp_options structure.
 */
typedef struct lcp_options 
{
   int      passive : 1;      /* Don't die if we don't get a response */
   int      silent  : 1;      /* Wait for the other end to start first */
   int      restart : 1;      /* Restart vs. exit after close */
   int      neg_mru : 1;      /* Negotiate the MRU? */
   int      neg_asyncmap : 1; /* Negotiate the async map? */
   int      neg_upap : 1;     /* Ask for UPAP authentication? */
   int      neg_chap : 1;     /* Ask for CHAP authentication? */
   int      neg_magicnumber : 1;    /* Ask for magic number? */
   int      neg_pcompression : 1;   /* HDLC Protocol Field Compression? */
   int      neg_accompression :  1; /* HDLC Address/Control Field Compression? */
   int      neg_lqr : 1;      /* Negotiate use of Link Quality Reports */

#ifdef PPP_MULTILINK
   int      neg_ml_mru : 1;   /* Negotiate Multilink (MRU flags multlilink use) */
   int      neg_ml_ssn : 1;   /* Negotiate Multilink Short Sequence Numbers */
   int      neg_ml_endp : 1;  /* Negotiate Multilink Endpoint Descriminator */

   u_short  ml_mru;           /* MRU for multilink datagram */
#endif   /* PPP_MULTILINK */

   u_long   asyncmap;         /* Value of async map */
   u_long   magicnumber;
   int      numloops;         /* Number of loops during magic number neg. */
   u_long   lqr_period;       /* Reporting period for link quality */
   u_short  mru;              /* Value of link's MRU */
   u_char   chap_mdtype;      /* which MD type (hashing algorithm) */
} lcp_options;

   
/* lcp func table routines  (CI = Configuration Information) */

void lcp_resetci (M_PPP);        /* Reset our CI */
int  lcp_addci (M_PPP);          /* Add our CI to pkt */
int  lcp_ackci (M_PPP, u_char *, int);    /* Peer ack'd our CI */
int  lcp_nakci (M_PPP, u_char *, int);    /* Peer nak'd our CI */
int  lcp_rejci (M_PPP, u_char *, int);    /* Peer rej'd our CI */
int  lcp_reqci (M_PPP, u_char *, int *, int);   /* Rcv peer CI */
void lcp_up (M_PPP);             /* We're UP */
void lcp_down (M_PPP);           /* We're DOWN */
void lcp_starting (M_PPP);       /* We need lower layer up */
void lcp_finished (M_PPP);       /* We need lower layer down */
int  lcp_extcode (M_PPP, u_char, u_char, u_char *, int);
void lcp_rprotrej (M_PPP, u_char *, int);



#define  MINMRU   128      /* No MRUs below this */

void     lcp_init (M_PPP);
void     lcp_open (M_PPP);
void     lcp_close (M_PPP);
void     lcp_lowerup (M_PPP);
void     lcp_lowerdown (M_PPP);
void     lcp_input (M_PPP, u_char *, int);
void     lcp_protrej (M_PPP);

extern   int   lcp_warnloops; /* Warn about a loopback this often */
#define  DEFWARNLOOPS   10    /* Default value for above */


/* The structure below is maintained for each Multilink bundle in the MASTER
 * LINK ONLY. If the mppp->pppflags ML_IPCP bit is not set then the 
 * contents are meaningless and the bundle info is given by
 * mppp->ml_ipcp->mlconf. This structure is in this file since most
 * of it's info is negotiated by LCP.
 */

struct multilink_bundle
{
   u_short  mmru;          /* multilink MRU */
   u_char   endp_class;    /* class of Endpoint Descriminator */
   u_char   endp_length;   /* length of endp descriminator */
   u_char   endp_desc[20]; /* the actual Endpoint Descriminator data */
   int      mlflags;       /* see MF_ bits below */
};

#define MF_SHORTSEQ  1  /* Use short sequence header format */


#define  MAXENDP  20    /* Max. legal length of endpoint descriminator */
extern u_short    ml_endpclass;
extern int        ml_endplen;
extern u_char     ml_endp[MAXENDP];    /* opaque */

/* Multi Link Endpoint Descriptor classes */

#define MLEDCLASS_NULL  0     /* default descriptor  */
#define MLEDCLASS_LOCAL 1     /* locally assigned descriptor  */
#define MLEDCLASS_IP    2     /* descriptor is IP address */
#define MLEDCLASS_MAC   3     /* descriptor is MAC address  */
#define MLEDCLASS_MAGIC 4     /* deprecated */



#endif   /* _LCP_H */
/* end of file lcp.h */