/****************************************************************************** lcp.h - Network Link Control Protocol header file.** Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.* portions Copyright (c) 1997 Global Election Systems Inc.** The authors hereby grant permission to use, copy, modify, distribute,* and license this software and its documentation for any purpose, provided* that existing copyright notices are retained in all copies and that this* notice and the following disclaimer are included verbatim in any * distributions. No written agreement, license, or royalty fee is required* for any of the authorized uses.** THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.******************************************************************************** REVISION HISTORY** 03-01-01 Marc Boucher <marc@mbsi.ca>*   Ported to lwIP.* 97-11-05 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc.*	Original derived from BSD codes.*****************************************************************************//* * 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. * * $Id: lcp.h,v 1.1 2007/05/08 03:57:37 lhhuang Exp $ */#ifndef LCP_H#define LCP_H/**************************** PUBLIC DEFINITIONS ****************************//* * 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_PCOMPRESSION	7	/* Protocol Field Compression */#define CI_ACCOMPRESSION 8	/* Address/Control Field Compression */#define CI_CALLBACK	13	/* callback */#define CI_MRRU		17	/* max reconstructed receive unit; multilink */#define CI_SSNHF	18	/* short sequence numbers for multilink */#define CI_EPDISC	19	/* endpoint discriminator *//* * LCP-specific packet types. */#define PROTREJ		8	/* Protocol Reject */#define ECHOREQ		9	/* Echo Request */#define ECHOREP		10	/* Echo Reply */#define DISCREQ		11	/* Discard Request */#define CBCP_OPT	6	/* Use callback control protocol *//*************************** PUBLIC DATA TYPES ***************************//* * The state of options is described by an lcp_options structure. */typedef struct lcp_options {    u_int passive : 1;			/* Don't die if we don't get a response */    u_int silent : 1;				/* Wait for the other end to start first */    u_int restart : 1;			/* Restart vs. exit after close */    u_int neg_mru : 1;			/* Negotiate the MRU? */    u_int neg_asyncmap : 1;		/* Negotiate the async map? */    u_int neg_upap : 1;			/* Ask for UPAP authentication? */    u_int neg_chap : 1;			/* Ask for CHAP authentication? */    u_int neg_magicnumber : 1;	/* Ask for magic number? */    u_int neg_pcompression : 1;	/* HDLC Protocol Field Compression? */    u_int neg_accompression : 1;	/* HDLC Address/Control Field Compression? */    u_int neg_lqr : 1;			/* Negotiate use of Link Quality Reports */    u_int neg_cbcp : 1;			/* Negotiate use of CBCP */#ifdef PPP_MULTILINK    u_int neg_mrru : 1;			/* Negotiate multilink MRRU */    u_int neg_ssnhf : 1;		/* Negotiate short sequence numbers */    u_int neg_endpoint : 1;		/* Negotiate endpoint discriminator */#endif    u_short mru;			/* Value of MRU */#ifdef PPP_MULTILINK    u_short mrru;			/* Value of MRRU, and multilink enable */#endif    u_char chap_mdtype;			/* which MD type (hashing algorithm) */    u32_t asyncmap;			/* Value of async map */    u32_t magicnumber;    int numloops;				/* Number of loops during magic number neg. */    u32_t lqr_period;		/* Reporting period for LQR 1/100ths second */#ifdef PPP_MULTILINK    struct epdisc endpoint;	/* endpoint discriminator */#endif} lcp_options;/* * Values for phase from BSD pppd.h based on RFC 1661. */typedef enum {	PHASE_DEAD = 0,	PHASE_INITIALIZE,	PHASE_ESTABLISH,	PHASE_AUTHENTICATE,	PHASE_CALLBACK,	PHASE_NETWORK,	PHASE_TERMINATE} LinkPhase;/******************************** PUBLIC DATA STRUCTURES ********************************/extern LinkPhase lcp_phase[NUM_PPP];	/* Phase of link session (RFC 1661) */extern lcp_options lcp_wantoptions[];extern lcp_options lcp_gotoptions[];extern lcp_options lcp_allowoptions[];extern lcp_options lcp_hisoptions[];extern ext_accm xmit_accm[];/************************** PUBLIC FUNCTIONS **************************/void lcp_init (int);void lcp_open (int);void lcp_close (int, char *);void lcp_lowerup (int);void lcp_lowerdown (int);void lcp_sprotrej (int, u_char *, int);	/* send protocol reject */extern struct protent lcp_protent;/* Default number of times we receive our magic number from the peer   before deciding the link is looped-back. */#define DEFLOOPBACKFAIL	10#endif /* LCP_H */