lwip_ppp_ethernet - LwIP with PPP & Ethernet integration

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LwIP with PPP & Ethernet integration

This is the mbed port of the LwIP stack: http://savannah.nongnu.org/projects/lwip/

It includes contributed content from NXP's port for LPCxxxx devices: http://www.lpcware.com/content/project/lightweight-ip-lwip-networking-stack

Licence

LwIP is licenced under the BSD licence:

Copyright (c) 2001-2004 Swedish Institute of Computer Science. 
All rights reserved. 
Redistribution and use in source and binary forms, with or without modification, 
are permitted provided that the following conditions are met: 
1. Redistributions of source code must retain the above copyright notice, 
this list of conditions and the following disclaimer. 
2. Redistributions in binary form must reproduce the above copyright notice, 
this list of conditions and the following disclaimer in the documentation 
and/or other materials provided with the distribution. 
3. The name of the author may not be used to endorse or promote products 
derived from this software without specific prior written permission. 
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.

src/netif/ppp/lcp.c@0:8e01dca41002, 2012-05-24 (annotated)

Committer:: donatien
Date:: Thu May 24 15:53:48 2012 +0000
Revision:: 0:8e01dca41002

Merge with Emilio's LwIp

Who changed what in which revision?

User	Revision	Line number	New contents of line
donatien	0:8e01dca41002	1	/*****************************************************************************
donatien	0:8e01dca41002	2	* lcp.c - Network Link Control Protocol program file.
donatien	0:8e01dca41002	3	*
donatien	0:8e01dca41002	4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
donatien	0:8e01dca41002	5	* portions Copyright (c) 1997 by Global Election Systems Inc.
donatien	0:8e01dca41002	6	*
donatien	0:8e01dca41002	7	* The authors hereby grant permission to use, copy, modify, distribute,
donatien	0:8e01dca41002	8	* and license this software and its documentation for any purpose, provided
donatien	0:8e01dca41002	9	* that existing copyright notices are retained in all copies and that this
donatien	0:8e01dca41002	10	* notice and the following disclaimer are included verbatim in any
donatien	0:8e01dca41002	11	* distributions. No written agreement, license, or royalty fee is required
donatien	0:8e01dca41002	12	* for any of the authorized uses.
donatien	0:8e01dca41002	13	*
donatien	0:8e01dca41002	14	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
donatien	0:8e01dca41002	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
donatien	0:8e01dca41002	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
donatien	0:8e01dca41002	17	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
donatien	0:8e01dca41002	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
donatien	0:8e01dca41002	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
donatien	0:8e01dca41002	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
donatien	0:8e01dca41002	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
donatien	0:8e01dca41002	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
donatien	0:8e01dca41002	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
donatien	0:8e01dca41002	24	*
donatien	0:8e01dca41002	25	******************************************************************************
donatien	0:8e01dca41002	26	* REVISION HISTORY
donatien	0:8e01dca41002	27	*
donatien	0:8e01dca41002	28	* 03-01-01 Marc Boucher <marc@mbsi.ca>
donatien	0:8e01dca41002	29	* Ported to lwIP.
donatien	0:8e01dca41002	30	* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
donatien	0:8e01dca41002	31	* Original.
donatien	0:8e01dca41002	32	*****************************************************************************/
donatien	0:8e01dca41002	33
donatien	0:8e01dca41002	34	/*
donatien	0:8e01dca41002	35	* lcp.c - PPP Link Control Protocol.
donatien	0:8e01dca41002	36	*
donatien	0:8e01dca41002	37	* Copyright (c) 1989 Carnegie Mellon University.
donatien	0:8e01dca41002	38	* All rights reserved.
donatien	0:8e01dca41002	39	*
donatien	0:8e01dca41002	40	* Redistribution and use in source and binary forms are permitted
donatien	0:8e01dca41002	41	* provided that the above copyright notice and this paragraph are
donatien	0:8e01dca41002	42	* duplicated in all such forms and that any documentation,
donatien	0:8e01dca41002	43	* advertising materials, and other materials related to such
donatien	0:8e01dca41002	44	* distribution and use acknowledge that the software was developed
donatien	0:8e01dca41002	45	* by Carnegie Mellon University. The name of the
donatien	0:8e01dca41002	46	* University may not be used to endorse or promote products derived
donatien	0:8e01dca41002	47	* from this software without specific prior written permission.
donatien	0:8e01dca41002	48	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
donatien	0:8e01dca41002	49	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
donatien	0:8e01dca41002	50	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
donatien	0:8e01dca41002	51	*/
donatien	0:8e01dca41002	52
donatien	0:8e01dca41002	53
donatien	0:8e01dca41002	54	#include "lwip/opt.h"
donatien	0:8e01dca41002	55
donatien	0:8e01dca41002	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
donatien	0:8e01dca41002	57
donatien	0:8e01dca41002	58	#include "ppp.h"
donatien	0:8e01dca41002	59	#include "pppdebug.h"
donatien	0:8e01dca41002	60
donatien	0:8e01dca41002	61	#include "fsm.h"
donatien	0:8e01dca41002	62	#include "chap.h"
donatien	0:8e01dca41002	63	#include "magic.h"
donatien	0:8e01dca41002	64	#include "auth.h"
donatien	0:8e01dca41002	65	#include "lcp.h"
donatien	0:8e01dca41002	66
donatien	0:8e01dca41002	67	#include <string.h>
donatien	0:8e01dca41002	68
donatien	0:8e01dca41002	69	#if PPPOE_SUPPORT
donatien	0:8e01dca41002	70	#include "netif/ppp_oe.h"
donatien	0:8e01dca41002	71	#else
donatien	0:8e01dca41002	72	#define PPPOE_MAXMTU PPP_MAXMRU
donatien	0:8e01dca41002	73	#endif
donatien	0:8e01dca41002	74
donatien	0:8e01dca41002	75	#if 0 /* UNUSED */
donatien	0:8e01dca41002	76	/*
donatien	0:8e01dca41002	77	* LCP-related command-line options.
donatien	0:8e01dca41002	78	*/
donatien	0:8e01dca41002	79	int lcp_echo_interval = 0; /* Interval between LCP echo-requests */
donatien	0:8e01dca41002	80	int lcp_echo_fails = 0; /* Tolerance to unanswered echo-requests */
donatien	0:8e01dca41002	81	bool lax_recv = 0; /* accept control chars in asyncmap */
donatien	0:8e01dca41002	82
donatien	0:8e01dca41002	83	static int setescape (char **);
donatien	0:8e01dca41002	84
donatien	0:8e01dca41002	85	static option_t lcp_option_list[] = {
donatien	0:8e01dca41002	86	/* LCP options */
donatien	0:8e01dca41002	87	/* list stripped for simplicity */
donatien	0:8e01dca41002	88	{NULL}
donatien	0:8e01dca41002	89	};
donatien	0:8e01dca41002	90	#endif /* UNUSED */
donatien	0:8e01dca41002	91
donatien	0:8e01dca41002	92	/* options */
donatien	0:8e01dca41002	93	LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */
donatien	0:8e01dca41002	94	static u_int lcp_echo_interval = LCP_ECHOINTERVAL; /* Interval between LCP echo-requests */
donatien	0:8e01dca41002	95	static u_int lcp_echo_fails = LCP_MAXECHOFAILS; /* Tolerance to unanswered echo-requests */
donatien	0:8e01dca41002	96
donatien	0:8e01dca41002	97	/* global vars */
donatien	0:8e01dca41002	98	static fsm lcp_fsm[NUM_PPP]; /* LCP fsm structure (global)*/
donatien	0:8e01dca41002	99	lcp_options lcp_wantoptions[NUM_PPP]; /* Options that we want to request */
donatien	0:8e01dca41002	100	lcp_options lcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
donatien	0:8e01dca41002	101	lcp_options lcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
donatien	0:8e01dca41002	102	lcp_options lcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
donatien	0:8e01dca41002	103	ext_accm xmit_accm[NUM_PPP]; /* extended transmit ACCM */
donatien	0:8e01dca41002	104
donatien	0:8e01dca41002	105	static u32_t lcp_echos_pending = 0; /* Number of outstanding echo msgs */
donatien	0:8e01dca41002	106	static u32_t lcp_echo_number = 0; /* ID number of next echo frame */
donatien	0:8e01dca41002	107	static u32_t lcp_echo_timer_running = 0; /* TRUE if a timer is running */
donatien	0:8e01dca41002	108
donatien	0:8e01dca41002	109	/* @todo: do we really need such a large buffer? The typical 1500 bytes seem too much. */
donatien	0:8e01dca41002	110	static u_char nak_buffer[PPP_MRU] __attribute((section("AHBSRAM1"))); //Add DG; /* where we construct a nak packet */
donatien	0:8e01dca41002	111
donatien	0:8e01dca41002	112	/*
donatien	0:8e01dca41002	113	* Callbacks for fsm code. (CI = Configuration Information)
donatien	0:8e01dca41002	114	*/
donatien	0:8e01dca41002	115	static void lcp_resetci (fsm); / Reset our CI */
donatien	0:8e01dca41002	116	static int lcp_cilen (fsm); / Return length of our CI */
donatien	0:8e01dca41002	117	static void lcp_addci (fsm, u_char, int); / Add our CI to pkt */
donatien	0:8e01dca41002	118	static int lcp_ackci (fsm, u_char, int); /* Peer ack'd our CI */
donatien	0:8e01dca41002	119	static int lcp_nakci (fsm, u_char, int); /* Peer nak'd our CI */
donatien	0:8e01dca41002	120	static int lcp_rejci (fsm, u_char, int); /* Peer rej'd our CI */
donatien	0:8e01dca41002	121	static int lcp_reqci (fsm, u_char, int, int); / Rcv peer CI */
donatien	0:8e01dca41002	122	static void lcp_up (fsm); / We're UP */
donatien	0:8e01dca41002	123	static void lcp_down (fsm); / We're DOWN */
donatien	0:8e01dca41002	124	static void lcp_starting (fsm); / We need lower layer up */
donatien	0:8e01dca41002	125	static void lcp_finished (fsm); / We need lower layer down */
donatien	0:8e01dca41002	126	static int lcp_extcode (fsm, int, u_char, u_char, int);
donatien	0:8e01dca41002	127	static void lcp_rprotrej (fsm, u_char, int);
donatien	0:8e01dca41002	128
donatien	0:8e01dca41002	129	/*
donatien	0:8e01dca41002	130	* routines to send LCP echos to peer
donatien	0:8e01dca41002	131	*/
donatien	0:8e01dca41002	132
donatien	0:8e01dca41002	133	static void lcp_echo_lowerup (int);
donatien	0:8e01dca41002	134	static void lcp_echo_lowerdown (int);
donatien	0:8e01dca41002	135	static void LcpEchoTimeout (void*);
donatien	0:8e01dca41002	136	static void lcp_received_echo_reply (fsm, int, u_char, int);
donatien	0:8e01dca41002	137	static void LcpSendEchoRequest (fsm*);
donatien	0:8e01dca41002	138	static void LcpLinkFailure (fsm*);
donatien	0:8e01dca41002	139	static void LcpEchoCheck (fsm*);
donatien	0:8e01dca41002	140
donatien	0:8e01dca41002	141	static fsm_callbacks lcp_callbacks = { /* LCP callback routines */
donatien	0:8e01dca41002	142	lcp_resetci, /* Reset our Configuration Information */
donatien	0:8e01dca41002	143	lcp_cilen, /* Length of our Configuration Information */
donatien	0:8e01dca41002	144	lcp_addci, /* Add our Configuration Information */
donatien	0:8e01dca41002	145	lcp_ackci, /* ACK our Configuration Information */
donatien	0:8e01dca41002	146	lcp_nakci, /* NAK our Configuration Information */
donatien	0:8e01dca41002	147	lcp_rejci, /* Reject our Configuration Information */
donatien	0:8e01dca41002	148	lcp_reqci, /* Request peer's Configuration Information */
donatien	0:8e01dca41002	149	lcp_up, /* Called when fsm reaches LS_OPENED state */
donatien	0:8e01dca41002	150	lcp_down, /* Called when fsm leaves LS_OPENED state */
donatien	0:8e01dca41002	151	lcp_starting, /* Called when we want the lower layer up */
donatien	0:8e01dca41002	152	lcp_finished, /* Called when we want the lower layer down */
donatien	0:8e01dca41002	153	NULL, /* Called when Protocol-Reject received */
donatien	0:8e01dca41002	154	NULL, /* Retransmission is necessary */
donatien	0:8e01dca41002	155	lcp_extcode, /* Called to handle LCP-specific codes */
donatien	0:8e01dca41002	156	"LCP" /* String name of protocol */
donatien	0:8e01dca41002	157	};
donatien	0:8e01dca41002	158
donatien	0:8e01dca41002	159	/*
donatien	0:8e01dca41002	160	* Protocol entry points.
donatien	0:8e01dca41002	161	* Some of these are called directly.
donatien	0:8e01dca41002	162	*/
donatien	0:8e01dca41002	163
donatien	0:8e01dca41002	164	static void lcp_input (int, u_char *, int);
donatien	0:8e01dca41002	165	static void lcp_protrej (int);
donatien	0:8e01dca41002	166
donatien	0:8e01dca41002	167	struct protent lcp_protent = {
donatien	0:8e01dca41002	168	PPP_LCP,
donatien	0:8e01dca41002	169	lcp_init,
donatien	0:8e01dca41002	170	lcp_input,
donatien	0:8e01dca41002	171	lcp_protrej,
donatien	0:8e01dca41002	172	lcp_lowerup,
donatien	0:8e01dca41002	173	lcp_lowerdown,
donatien	0:8e01dca41002	174	lcp_open,
donatien	0:8e01dca41002	175	lcp_close,
donatien	0:8e01dca41002	176	#if PPP_ADDITIONAL_CALLBACKS
donatien	0:8e01dca41002	177	lcp_printpkt,
donatien	0:8e01dca41002	178	NULL,
donatien	0:8e01dca41002	179	#endif /* PPP_ADDITIONAL_CALLBACKS */
donatien	0:8e01dca41002	180	1,
donatien	0:8e01dca41002	181	"LCP",
donatien	0:8e01dca41002	182	#if PPP_ADDITIONAL_CALLBACKS
donatien	0:8e01dca41002	183	NULL,
donatien	0:8e01dca41002	184	NULL,
donatien	0:8e01dca41002	185	NULL
donatien	0:8e01dca41002	186	#endif /* PPP_ADDITIONAL_CALLBACKS */
donatien	0:8e01dca41002	187	};
donatien	0:8e01dca41002	188
donatien	0:8e01dca41002	189	int lcp_loopbackfail = DEFLOOPBACKFAIL;
donatien	0:8e01dca41002	190
donatien	0:8e01dca41002	191	/*
donatien	0:8e01dca41002	192	* Length of each type of configuration option (in octets)
donatien	0:8e01dca41002	193	*/
donatien	0:8e01dca41002	194	#define CILEN_VOID 2
donatien	0:8e01dca41002	195	#define CILEN_CHAR 3
donatien	0:8e01dca41002	196	#define CILEN_SHORT 4 /* CILEN_VOID + sizeof(short) */
donatien	0:8e01dca41002	197	#define CILEN_CHAP 5 /* CILEN_VOID + sizeof(short) + 1 */
donatien	0:8e01dca41002	198	#define CILEN_LONG 6 /* CILEN_VOID + sizeof(long) */
donatien	0:8e01dca41002	199	#define CILEN_LQR 8 /* CILEN_VOID + sizeof(short) + sizeof(long) */
donatien	0:8e01dca41002	200	#define CILEN_CBCP 3
donatien	0:8e01dca41002	201
donatien	0:8e01dca41002	202	#define CODENAME(x) ((x) == CONFACK ? "ACK" : (x) == CONFNAK ? "NAK" : "REJ")
donatien	0:8e01dca41002	203
donatien	0:8e01dca41002	204	#if 0 /* UNUSED */
donatien	0:8e01dca41002	205	/*
donatien	0:8e01dca41002	206	* setescape - add chars to the set we escape on transmission.
donatien	0:8e01dca41002	207	*/
donatien	0:8e01dca41002	208	static int
donatien	0:8e01dca41002	209	setescape(argv)
donatien	0:8e01dca41002	210	char **argv;
donatien	0:8e01dca41002	211	{
donatien	0:8e01dca41002	212	int n, ret;
donatien	0:8e01dca41002	213	char p, endp;
donatien	0:8e01dca41002	214
donatien	0:8e01dca41002	215	p = *argv;
donatien	0:8e01dca41002	216	ret = 1;
donatien	0:8e01dca41002	217	while (*p) {
donatien	0:8e01dca41002	218	n = strtol(p, &endp, 16);
donatien	0:8e01dca41002	219	if (p == endp) {
donatien	0:8e01dca41002	220	option_error("escape parameter contains invalid hex number '%s'", p);
donatien	0:8e01dca41002	221	return 0;
donatien	0:8e01dca41002	222	}
donatien	0:8e01dca41002	223	p = endp;
donatien	0:8e01dca41002	224	if (n < 0 \|\| n == 0x5E \|\| n > 0xFF) {
donatien	0:8e01dca41002	225	option_error("can't escape character 0x%x", n);
donatien	0:8e01dca41002	226	ret = 0;
donatien	0:8e01dca41002	227	} else
donatien	0:8e01dca41002	228	xmit_accm[0][n >> 5] \|= 1 << (n & 0x1F);
donatien	0:8e01dca41002	229	while (p == ',' \|\| p == ' ')
donatien	0:8e01dca41002	230	++p;
donatien	0:8e01dca41002	231	}
donatien	0:8e01dca41002	232	return ret;
donatien	0:8e01dca41002	233	}
donatien	0:8e01dca41002	234	#endif /* UNUSED */
donatien	0:8e01dca41002	235
donatien	0:8e01dca41002	236	/*
donatien	0:8e01dca41002	237	* lcp_init - Initialize LCP.
donatien	0:8e01dca41002	238	*/
donatien	0:8e01dca41002	239	void
donatien	0:8e01dca41002	240	lcp_init(int unit)
donatien	0:8e01dca41002	241	{
donatien	0:8e01dca41002	242	fsm *f = &lcp_fsm[unit];
donatien	0:8e01dca41002	243	lcp_options *wo = &lcp_wantoptions[unit];
donatien	0:8e01dca41002	244	lcp_options *ao = &lcp_allowoptions[unit];
donatien	0:8e01dca41002	245
donatien	0:8e01dca41002	246	f->unit = unit;
donatien	0:8e01dca41002	247	f->protocol = PPP_LCP;
donatien	0:8e01dca41002	248	f->callbacks = &lcp_callbacks;
donatien	0:8e01dca41002	249
donatien	0:8e01dca41002	250	fsm_init(f);
donatien	0:8e01dca41002	251
donatien	0:8e01dca41002	252	wo->passive = 0;
donatien	0:8e01dca41002	253	wo->silent = 0;
donatien	0:8e01dca41002	254	wo->restart = 0; /* Set to 1 in kernels or multi-line implementations */
donatien	0:8e01dca41002	255	wo->neg_mru = 1;
donatien	0:8e01dca41002	256	wo->mru = PPP_DEFMRU;
donatien	0:8e01dca41002	257	wo->neg_asyncmap = 1;
donatien	0:8e01dca41002	258	wo->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
donatien	0:8e01dca41002	259	wo->neg_chap = 0; /* Set to 1 on server */
donatien	0:8e01dca41002	260	wo->neg_upap = 0; /* Set to 1 on server */
donatien	0:8e01dca41002	261	wo->chap_mdtype = CHAP_DIGEST_MD5;
donatien	0:8e01dca41002	262	wo->neg_magicnumber = 1;
donatien	0:8e01dca41002	263	wo->neg_pcompression = 1;
donatien	0:8e01dca41002	264	wo->neg_accompression = 1;
donatien	0:8e01dca41002	265	wo->neg_lqr = 0; /* no LQR implementation yet */
donatien	0:8e01dca41002	266	wo->neg_cbcp = 0;
donatien	0:8e01dca41002	267
donatien	0:8e01dca41002	268	ao->neg_mru = 1;
donatien	0:8e01dca41002	269	ao->mru = PPP_MAXMRU;
donatien	0:8e01dca41002	270	ao->neg_asyncmap = 1;
donatien	0:8e01dca41002	271	ao->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
donatien	0:8e01dca41002	272	ao->neg_chap = (CHAP_SUPPORT != 0);
donatien	0:8e01dca41002	273	ao->chap_mdtype = CHAP_DIGEST_MD5;
donatien	0:8e01dca41002	274	ao->neg_upap = (PAP_SUPPORT != 0);
donatien	0:8e01dca41002	275	ao->neg_magicnumber = 1;
donatien	0:8e01dca41002	276	ao->neg_pcompression = 1;
donatien	0:8e01dca41002	277	ao->neg_accompression = 1;
donatien	0:8e01dca41002	278	ao->neg_lqr = 0; /* no LQR implementation yet */
donatien	0:8e01dca41002	279	ao->neg_cbcp = (CBCP_SUPPORT != 0);
donatien	0:8e01dca41002	280
donatien	0:8e01dca41002	281	/*
donatien	0:8e01dca41002	282	* Set transmit escape for the flag and escape characters plus anything
donatien	0:8e01dca41002	283	* set for the allowable options.
donatien	0:8e01dca41002	284	*/
donatien	0:8e01dca41002	285	memset(xmit_accm[unit], 0, sizeof(xmit_accm[0]));
donatien	0:8e01dca41002	286	xmit_accm[unit][15] = 0x60;
donatien	0:8e01dca41002	287	xmit_accm[unit][0] = (u_char)((ao->asyncmap & 0xFF));
donatien	0:8e01dca41002	288	xmit_accm[unit][1] = (u_char)((ao->asyncmap >> 8) & 0xFF);
donatien	0:8e01dca41002	289	xmit_accm[unit][2] = (u_char)((ao->asyncmap >> 16) & 0xFF);
donatien	0:8e01dca41002	290	xmit_accm[unit][3] = (u_char)((ao->asyncmap >> 24) & 0xFF);
donatien	0:8e01dca41002	291	LCPDEBUG(LOG_INFO, ("lcp_init: xmit_accm=%X %X %X %X\n",
donatien	0:8e01dca41002	292	xmit_accm[unit][0],
donatien	0:8e01dca41002	293	xmit_accm[unit][1],
donatien	0:8e01dca41002	294	xmit_accm[unit][2],
donatien	0:8e01dca41002	295	xmit_accm[unit][3]));
donatien	0:8e01dca41002	296
donatien	0:8e01dca41002	297	lcp_phase[unit] = PHASE_INITIALIZE;
donatien	0:8e01dca41002	298	}
donatien	0:8e01dca41002	299
donatien	0:8e01dca41002	300
donatien	0:8e01dca41002	301	/*
donatien	0:8e01dca41002	302	* lcp_open - LCP is allowed to come up.
donatien	0:8e01dca41002	303	*/
donatien	0:8e01dca41002	304	void
donatien	0:8e01dca41002	305	lcp_open(int unit)
donatien	0:8e01dca41002	306	{
donatien	0:8e01dca41002	307	fsm *f = &lcp_fsm[unit];
donatien	0:8e01dca41002	308	lcp_options *wo = &lcp_wantoptions[unit];
donatien	0:8e01dca41002	309
donatien	0:8e01dca41002	310	f->flags = 0;
donatien	0:8e01dca41002	311	if (wo->passive) {
donatien	0:8e01dca41002	312	f->flags \|= OPT_PASSIVE;
donatien	0:8e01dca41002	313	}
donatien	0:8e01dca41002	314	if (wo->silent) {
donatien	0:8e01dca41002	315	f->flags \|= OPT_SILENT;
donatien	0:8e01dca41002	316	}
donatien	0:8e01dca41002	317	fsm_open(f);
donatien	0:8e01dca41002	318
donatien	0:8e01dca41002	319	lcp_phase[unit] = PHASE_ESTABLISH;
donatien	0:8e01dca41002	320	}
donatien	0:8e01dca41002	321
donatien	0:8e01dca41002	322
donatien	0:8e01dca41002	323	/*
donatien	0:8e01dca41002	324	* lcp_close - Take LCP down.
donatien	0:8e01dca41002	325	*/
donatien	0:8e01dca41002	326	void
donatien	0:8e01dca41002	327	lcp_close(int unit, char *reason)
donatien	0:8e01dca41002	328	{
donatien	0:8e01dca41002	329	fsm *f = &lcp_fsm[unit];
donatien	0:8e01dca41002	330
donatien	0:8e01dca41002	331	if (lcp_phase[unit] != PHASE_DEAD) {
donatien	0:8e01dca41002	332	lcp_phase[unit] = PHASE_TERMINATE;
donatien	0:8e01dca41002	333	}
donatien	0:8e01dca41002	334	if (f->state == LS_STOPPED && f->flags & (OPT_PASSIVE\|OPT_SILENT)) {
donatien	0:8e01dca41002	335	/*
donatien	0:8e01dca41002	336	* This action is not strictly according to the FSM in RFC1548,
donatien	0:8e01dca41002	337	* but it does mean that the program terminates if you do an
donatien	0:8e01dca41002	338	* lcp_close() in passive/silent mode when a connection hasn't
donatien	0:8e01dca41002	339	* been established.
donatien	0:8e01dca41002	340	*/
donatien	0:8e01dca41002	341	f->state = LS_CLOSED;
donatien	0:8e01dca41002	342	lcp_finished(f);
donatien	0:8e01dca41002	343	} else {
donatien	0:8e01dca41002	344	fsm_close(f, reason);
donatien	0:8e01dca41002	345	}
donatien	0:8e01dca41002	346	}
donatien	0:8e01dca41002	347
donatien	0:8e01dca41002	348
donatien	0:8e01dca41002	349	/*
donatien	0:8e01dca41002	350	* lcp_lowerup - The lower layer is up.
donatien	0:8e01dca41002	351	*/
donatien	0:8e01dca41002	352	void
donatien	0:8e01dca41002	353	lcp_lowerup(int unit)
donatien	0:8e01dca41002	354	{
donatien	0:8e01dca41002	355	lcp_options *wo = &lcp_wantoptions[unit];
donatien	0:8e01dca41002	356
donatien	0:8e01dca41002	357	/*
donatien	0:8e01dca41002	358	* Don't use A/C or protocol compression on transmission,
donatien	0:8e01dca41002	359	* but accept A/C and protocol compressed packets
donatien	0:8e01dca41002	360	* if we are going to ask for A/C and protocol compression.
donatien	0:8e01dca41002	361	*/
donatien	0:8e01dca41002	362	ppp_set_xaccm(unit, &xmit_accm[unit]);
donatien	0:8e01dca41002	363	ppp_send_config(unit, PPP_MRU, 0xffffffffl, 0, 0);
donatien	0:8e01dca41002	364	ppp_recv_config(unit, PPP_MRU, 0x00000000l,
donatien	0:8e01dca41002	365	wo->neg_pcompression, wo->neg_accompression);
donatien	0:8e01dca41002	366	peer_mru[unit] = PPP_MRU;
donatien	0:8e01dca41002	367	lcp_allowoptions[unit].asyncmap = (u_long)xmit_accm[unit][0]
donatien	0:8e01dca41002	368	\| ((u_long)xmit_accm[unit][1] << 8)
donatien	0:8e01dca41002	369	\| ((u_long)xmit_accm[unit][2] << 16)
donatien	0:8e01dca41002	370	\| ((u_long)xmit_accm[unit][3] << 24);
donatien	0:8e01dca41002	371	LCPDEBUG(LOG_INFO, ("lcp_lowerup: asyncmap=%X %X %X %X\n",
donatien	0:8e01dca41002	372	xmit_accm[unit][3],
donatien	0:8e01dca41002	373	xmit_accm[unit][2],
donatien	0:8e01dca41002	374	xmit_accm[unit][1],
donatien	0:8e01dca41002	375	xmit_accm[unit][0]));
donatien	0:8e01dca41002	376
donatien	0:8e01dca41002	377	fsm_lowerup(&lcp_fsm[unit]);
donatien	0:8e01dca41002	378	}
donatien	0:8e01dca41002	379
donatien	0:8e01dca41002	380
donatien	0:8e01dca41002	381	/*
donatien	0:8e01dca41002	382	* lcp_lowerdown - The lower layer is down.
donatien	0:8e01dca41002	383	*/
donatien	0:8e01dca41002	384	void
donatien	0:8e01dca41002	385	lcp_lowerdown(int unit)
donatien	0:8e01dca41002	386	{
donatien	0:8e01dca41002	387	fsm_lowerdown(&lcp_fsm[unit]);
donatien	0:8e01dca41002	388	}
donatien	0:8e01dca41002	389
donatien	0:8e01dca41002	390
donatien	0:8e01dca41002	391	/*
donatien	0:8e01dca41002	392	* lcp_input - Input LCP packet.
donatien	0:8e01dca41002	393	*/
donatien	0:8e01dca41002	394	static void
donatien	0:8e01dca41002	395	lcp_input(int unit, u_char *p, int len)
donatien	0:8e01dca41002	396	{
donatien	0:8e01dca41002	397	fsm *f = &lcp_fsm[unit];
donatien	0:8e01dca41002	398
donatien	0:8e01dca41002	399	fsm_input(f, p, len);
donatien	0:8e01dca41002	400	}
donatien	0:8e01dca41002	401
donatien	0:8e01dca41002	402
donatien	0:8e01dca41002	403	/*
donatien	0:8e01dca41002	404	* lcp_extcode - Handle a LCP-specific code.
donatien	0:8e01dca41002	405	*/
donatien	0:8e01dca41002	406	static int
donatien	0:8e01dca41002	407	lcp_extcode(fsm f, int code, u_char id, u_char inp, int len)
donatien	0:8e01dca41002	408	{
donatien	0:8e01dca41002	409	u_char *magp;
donatien	0:8e01dca41002	410
donatien	0:8e01dca41002	411	switch( code ){
donatien	0:8e01dca41002	412	case PROTREJ:
donatien	0:8e01dca41002	413	lcp_rprotrej(f, inp, len);
donatien	0:8e01dca41002	414	break;
donatien	0:8e01dca41002	415
donatien	0:8e01dca41002	416	case ECHOREQ:
donatien	0:8e01dca41002	417	if (f->state != LS_OPENED) {
donatien	0:8e01dca41002	418	break;
donatien	0:8e01dca41002	419	}
donatien	0:8e01dca41002	420	LCPDEBUG(LOG_INFO, ("lcp: Echo-Request, Rcvd id %d\n", id));
donatien	0:8e01dca41002	421	magp = inp;
donatien	0:8e01dca41002	422	PUTLONG(lcp_gotoptions[f->unit].magicnumber, magp);
donatien	0:8e01dca41002	423	fsm_sdata(f, ECHOREP, id, inp, len);
donatien	0:8e01dca41002	424	break;
donatien	0:8e01dca41002	425
donatien	0:8e01dca41002	426	case ECHOREP:
donatien	0:8e01dca41002	427	lcp_received_echo_reply(f, id, inp, len);
donatien	0:8e01dca41002	428	break;
donatien	0:8e01dca41002	429
donatien	0:8e01dca41002	430	case DISCREQ:
donatien	0:8e01dca41002	431	break;
donatien	0:8e01dca41002	432
donatien	0:8e01dca41002	433	default:
donatien	0:8e01dca41002	434	return 0;
donatien	0:8e01dca41002	435	}
donatien	0:8e01dca41002	436	return 1;
donatien	0:8e01dca41002	437	}
donatien	0:8e01dca41002	438
donatien	0:8e01dca41002	439
donatien	0:8e01dca41002	440	/*
donatien	0:8e01dca41002	441	* lcp_rprotrej - Receive an Protocol-Reject.
donatien	0:8e01dca41002	442	*
donatien	0:8e01dca41002	443	* Figure out which protocol is rejected and inform it.
donatien	0:8e01dca41002	444	*/
donatien	0:8e01dca41002	445	static void
donatien	0:8e01dca41002	446	lcp_rprotrej(fsm f, u_char inp, int len)
donatien	0:8e01dca41002	447	{
donatien	0:8e01dca41002	448	int i;
donatien	0:8e01dca41002	449	struct protent *protp;
donatien	0:8e01dca41002	450	u_short prot;
donatien	0:8e01dca41002	451
donatien	0:8e01dca41002	452	if (len < (int)sizeof (u_short)) {
donatien	0:8e01dca41002	453	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd short Protocol-Reject packet!\n"));
donatien	0:8e01dca41002	454	return;
donatien	0:8e01dca41002	455	}
donatien	0:8e01dca41002	456
donatien	0:8e01dca41002	457	GETSHORT(prot, inp);
donatien	0:8e01dca41002	458
donatien	0:8e01dca41002	459	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd Protocol-Reject packet for %x!\n", prot));
donatien	0:8e01dca41002	460
donatien	0:8e01dca41002	461	/*
donatien	0:8e01dca41002	462	* Protocol-Reject packets received in any state other than the LCP
donatien	0:8e01dca41002	463	* LS_OPENED state SHOULD be silently discarded.
donatien	0:8e01dca41002	464	*/
donatien	0:8e01dca41002	465	if( f->state != LS_OPENED ) {
donatien	0:8e01dca41002	466	LCPDEBUG(LOG_INFO, ("Protocol-Reject discarded: LCP in state %d\n", f->state));
donatien	0:8e01dca41002	467	return;
donatien	0:8e01dca41002	468	}
donatien	0:8e01dca41002	469
donatien	0:8e01dca41002	470	/*
donatien	0:8e01dca41002	471	* Upcall the proper Protocol-Reject routine.
donatien	0:8e01dca41002	472	*/
donatien	0:8e01dca41002	473	for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
donatien	0:8e01dca41002	474	if (protp->protocol == prot && protp->enabled_flag) {
donatien	0:8e01dca41002	475	(*protp->protrej)(f->unit);
donatien	0:8e01dca41002	476	return;
donatien	0:8e01dca41002	477	}
donatien	0:8e01dca41002	478	}
donatien	0:8e01dca41002	479
donatien	0:8e01dca41002	480	LCPDEBUG(LOG_WARNING, ("Protocol-Reject for unsupported protocol 0x%x\n", prot));
donatien	0:8e01dca41002	481	}
donatien	0:8e01dca41002	482
donatien	0:8e01dca41002	483
donatien	0:8e01dca41002	484	/*
donatien	0:8e01dca41002	485	* lcp_protrej - A Protocol-Reject was received.
donatien	0:8e01dca41002	486	*/
donatien	0:8e01dca41002	487	static void
donatien	0:8e01dca41002	488	lcp_protrej(int unit)
donatien	0:8e01dca41002	489	{
donatien	0:8e01dca41002	490	LWIP_UNUSED_ARG(unit);
donatien	0:8e01dca41002	491	/*
donatien	0:8e01dca41002	492	* Can't reject LCP!
donatien	0:8e01dca41002	493	*/
donatien	0:8e01dca41002	494	LCPDEBUG(LOG_WARNING, ("lcp_protrej: Received Protocol-Reject for LCP!\n"));
donatien	0:8e01dca41002	495	fsm_protreject(&lcp_fsm[unit]);
donatien	0:8e01dca41002	496	}
donatien	0:8e01dca41002	497
donatien	0:8e01dca41002	498
donatien	0:8e01dca41002	499	/*
donatien	0:8e01dca41002	500	* lcp_sprotrej - Send a Protocol-Reject for some protocol.
donatien	0:8e01dca41002	501	*/
donatien	0:8e01dca41002	502	void
donatien	0:8e01dca41002	503	lcp_sprotrej(int unit, u_char *p, int len)
donatien	0:8e01dca41002	504	{
donatien	0:8e01dca41002	505	/*
donatien	0:8e01dca41002	506	* Send back the protocol and the information field of the
donatien	0:8e01dca41002	507	* rejected packet. We only get here if LCP is in the LS_OPENED state.
donatien	0:8e01dca41002	508	*/
donatien	0:8e01dca41002	509
donatien	0:8e01dca41002	510	fsm_sdata(&lcp_fsm[unit], PROTREJ, ++lcp_fsm[unit].id, p, len);
donatien	0:8e01dca41002	511	}
donatien	0:8e01dca41002	512
donatien	0:8e01dca41002	513
donatien	0:8e01dca41002	514	/*
donatien	0:8e01dca41002	515	* lcp_resetci - Reset our CI.
donatien	0:8e01dca41002	516	*/
donatien	0:8e01dca41002	517	static void
donatien	0:8e01dca41002	518	lcp_resetci(fsm *f)
donatien	0:8e01dca41002	519	{
donatien	0:8e01dca41002	520	lcp_wantoptions[f->unit].magicnumber = magic();
donatien	0:8e01dca41002	521	lcp_wantoptions[f->unit].numloops = 0;
donatien	0:8e01dca41002	522	lcp_gotoptions[f->unit] = lcp_wantoptions[f->unit];
donatien	0:8e01dca41002	523	peer_mru[f->unit] = PPP_MRU;
donatien	0:8e01dca41002	524	auth_reset(f->unit);
donatien	0:8e01dca41002	525	}
donatien	0:8e01dca41002	526
donatien	0:8e01dca41002	527
donatien	0:8e01dca41002	528	/*
donatien	0:8e01dca41002	529	* lcp_cilen - Return length of our CI.
donatien	0:8e01dca41002	530	*/
donatien	0:8e01dca41002	531	static int
donatien	0:8e01dca41002	532	lcp_cilen(fsm *f)
donatien	0:8e01dca41002	533	{
donatien	0:8e01dca41002	534	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:8e01dca41002	535
donatien	0:8e01dca41002	536	#define LENCIVOID(neg) ((neg) ? CILEN_VOID : 0)
donatien	0:8e01dca41002	537	#define LENCICHAP(neg) ((neg) ? CILEN_CHAP : 0)
donatien	0:8e01dca41002	538	#define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0)
donatien	0:8e01dca41002	539	#define LENCILONG(neg) ((neg) ? CILEN_LONG : 0)
donatien	0:8e01dca41002	540	#define LENCILQR(neg) ((neg) ? CILEN_LQR: 0)
donatien	0:8e01dca41002	541	#define LENCICBCP(neg) ((neg) ? CILEN_CBCP: 0)
donatien	0:8e01dca41002	542	/*
donatien	0:8e01dca41002	543	* NB: we only ask for one of CHAP and UPAP, even if we will
donatien	0:8e01dca41002	544	* accept either.
donatien	0:8e01dca41002	545	*/
donatien	0:8e01dca41002	546	return (LENCISHORT(go->neg_mru && go->mru != PPP_DEFMRU) +
donatien	0:8e01dca41002	547	LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) +
donatien	0:8e01dca41002	548	LENCICHAP(go->neg_chap) +
donatien	0:8e01dca41002	549	LENCISHORT(!go->neg_chap && go->neg_upap) +
donatien	0:8e01dca41002	550	LENCILQR(go->neg_lqr) +
donatien	0:8e01dca41002	551	LENCICBCP(go->neg_cbcp) +
donatien	0:8e01dca41002	552	LENCILONG(go->neg_magicnumber) +
donatien	0:8e01dca41002	553	LENCIVOID(go->neg_pcompression) +
donatien	0:8e01dca41002	554	LENCIVOID(go->neg_accompression));
donatien	0:8e01dca41002	555	}
donatien	0:8e01dca41002	556
donatien	0:8e01dca41002	557
donatien	0:8e01dca41002	558	/*
donatien	0:8e01dca41002	559	* lcp_addci - Add our desired CIs to a packet.
donatien	0:8e01dca41002	560	*/
donatien	0:8e01dca41002	561	static void
donatien	0:8e01dca41002	562	lcp_addci(fsm f, u_char ucp, int *lenp)
donatien	0:8e01dca41002	563	{
donatien	0:8e01dca41002	564	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:8e01dca41002	565	u_char *start_ucp = ucp;
donatien	0:8e01dca41002	566
donatien	0:8e01dca41002	567	#define ADDCIVOID(opt, neg) \
donatien	0:8e01dca41002	568	if (neg) { \
donatien	0:8e01dca41002	569	LCPDEBUG(LOG_INFO, ("lcp_addci: opt=%d\n", opt)); \
donatien	0:8e01dca41002	570	PUTCHAR(opt, ucp); \
donatien	0:8e01dca41002	571	PUTCHAR(CILEN_VOID, ucp); \
donatien	0:8e01dca41002	572	}
donatien	0:8e01dca41002	573	#define ADDCISHORT(opt, neg, val) \
donatien	0:8e01dca41002	574	if (neg) { \
donatien	0:8e01dca41002	575	LCPDEBUG(LOG_INFO, ("lcp_addci: INT opt=%d %X\n", opt, val)); \
donatien	0:8e01dca41002	576	PUTCHAR(opt, ucp); \
donatien	0:8e01dca41002	577	PUTCHAR(CILEN_SHORT, ucp); \
donatien	0:8e01dca41002	578	PUTSHORT(val, ucp); \
donatien	0:8e01dca41002	579	}
donatien	0:8e01dca41002	580	#define ADDCICHAP(opt, neg, val, digest) \
donatien	0:8e01dca41002	581	if (neg) { \
donatien	0:8e01dca41002	582	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAP opt=%d %X\n", opt, val)); \
donatien	0:8e01dca41002	583	PUTCHAR(opt, ucp); \
donatien	0:8e01dca41002	584	PUTCHAR(CILEN_CHAP, ucp); \
donatien	0:8e01dca41002	585	PUTSHORT(val, ucp); \
donatien	0:8e01dca41002	586	PUTCHAR(digest, ucp); \
donatien	0:8e01dca41002	587	}
donatien	0:8e01dca41002	588	#define ADDCILONG(opt, neg, val) \
donatien	0:8e01dca41002	589	if (neg) { \
donatien	0:8e01dca41002	590	LCPDEBUG(LOG_INFO, ("lcp_addci: L opt=%d %lX\n", opt, val)); \
donatien	0:8e01dca41002	591	PUTCHAR(opt, ucp); \
donatien	0:8e01dca41002	592	PUTCHAR(CILEN_LONG, ucp); \
donatien	0:8e01dca41002	593	PUTLONG(val, ucp); \
donatien	0:8e01dca41002	594	}
donatien	0:8e01dca41002	595	#define ADDCILQR(opt, neg, val) \
donatien	0:8e01dca41002	596	if (neg) { \
donatien	0:8e01dca41002	597	LCPDEBUG(LOG_INFO, ("lcp_addci: LQR opt=%d %lX\n", opt, val)); \
donatien	0:8e01dca41002	598	PUTCHAR(opt, ucp); \
donatien	0:8e01dca41002	599	PUTCHAR(CILEN_LQR, ucp); \
donatien	0:8e01dca41002	600	PUTSHORT(PPP_LQR, ucp); \
donatien	0:8e01dca41002	601	PUTLONG(val, ucp); \
donatien	0:8e01dca41002	602	}
donatien	0:8e01dca41002	603	#define ADDCICHAR(opt, neg, val) \
donatien	0:8e01dca41002	604	if (neg) { \
donatien	0:8e01dca41002	605	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAR opt=%d %X '%z'\n", opt, val, val)); \
donatien	0:8e01dca41002	606	PUTCHAR(opt, ucp); \
donatien	0:8e01dca41002	607	PUTCHAR(CILEN_CHAR, ucp); \
donatien	0:8e01dca41002	608	PUTCHAR(val, ucp); \
donatien	0:8e01dca41002	609	}
donatien	0:8e01dca41002	610
donatien	0:8e01dca41002	611	ADDCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
donatien	0:8e01dca41002	612	ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
donatien	0:8e01dca41002	613	ADDCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
donatien	0:8e01dca41002	614	ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
donatien	0:8e01dca41002	615	ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
donatien	0:8e01dca41002	616	ADDCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
donatien	0:8e01dca41002	617	ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
donatien	0:8e01dca41002	618	ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
donatien	0:8e01dca41002	619	ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
donatien	0:8e01dca41002	620
donatien	0:8e01dca41002	621	if (ucp - start_ucp != *lenp) {
donatien	0:8e01dca41002	622	/* this should never happen, because peer_mtu should be 1500 */
donatien	0:8e01dca41002	623	LCPDEBUG(LOG_ERR, ("Bug in lcp_addci: wrong length\n"));
donatien	0:8e01dca41002	624	}
donatien	0:8e01dca41002	625	}
donatien	0:8e01dca41002	626
donatien	0:8e01dca41002	627
donatien	0:8e01dca41002	628	/*
donatien	0:8e01dca41002	629	* lcp_ackci - Ack our CIs.
donatien	0:8e01dca41002	630	* This should not modify any state if the Ack is bad.
donatien	0:8e01dca41002	631	*
donatien	0:8e01dca41002	632	* Returns:
donatien	0:8e01dca41002	633	* 0 - Ack was bad.
donatien	0:8e01dca41002	634	* 1 - Ack was good.
donatien	0:8e01dca41002	635	*/
donatien	0:8e01dca41002	636	static int
donatien	0:8e01dca41002	637	lcp_ackci(fsm f, u_char p, int len)
donatien	0:8e01dca41002	638	{
donatien	0:8e01dca41002	639	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:8e01dca41002	640	u_char cilen, citype, cichar;
donatien	0:8e01dca41002	641	u_short cishort;
donatien	0:8e01dca41002	642	u32_t cilong;
donatien	0:8e01dca41002	643
donatien	0:8e01dca41002	644	/*
donatien	0:8e01dca41002	645	* CIs must be in exactly the same order that we sent.
donatien	0:8e01dca41002	646	* Check packet length and CI length at each step.
donatien	0:8e01dca41002	647	* If we find any deviations, then this packet is bad.
donatien	0:8e01dca41002	648	*/
donatien	0:8e01dca41002	649	#define ACKCIVOID(opt, neg) \
donatien	0:8e01dca41002	650	if (neg) { \
donatien	0:8e01dca41002	651	if ((len -= CILEN_VOID) < 0) \
donatien	0:8e01dca41002	652	goto bad; \
donatien	0:8e01dca41002	653	GETCHAR(citype, p); \
donatien	0:8e01dca41002	654	GETCHAR(cilen, p); \
donatien	0:8e01dca41002	655	if (cilen != CILEN_VOID \|\| citype != opt) \
donatien	0:8e01dca41002	656	goto bad; \
donatien	0:8e01dca41002	657	}
donatien	0:8e01dca41002	658	#define ACKCISHORT(opt, neg, val) \
donatien	0:8e01dca41002	659	if (neg) { \
donatien	0:8e01dca41002	660	if ((len -= CILEN_SHORT) < 0) \
donatien	0:8e01dca41002	661	goto bad; \
donatien	0:8e01dca41002	662	GETCHAR(citype, p); \
donatien	0:8e01dca41002	663	GETCHAR(cilen, p); \
donatien	0:8e01dca41002	664	if (cilen != CILEN_SHORT \|\| citype != opt) \
donatien	0:8e01dca41002	665	goto bad; \
donatien	0:8e01dca41002	666	GETSHORT(cishort, p); \
donatien	0:8e01dca41002	667	if (cishort != val) \
donatien	0:8e01dca41002	668	goto bad; \
donatien	0:8e01dca41002	669	}
donatien	0:8e01dca41002	670	#define ACKCICHAR(opt, neg, val) \
donatien	0:8e01dca41002	671	if (neg) { \
donatien	0:8e01dca41002	672	if ((len -= CILEN_CHAR) < 0) \
donatien	0:8e01dca41002	673	goto bad; \
donatien	0:8e01dca41002	674	GETCHAR(citype, p); \
donatien	0:8e01dca41002	675	GETCHAR(cilen, p); \
donatien	0:8e01dca41002	676	if (cilen != CILEN_CHAR \|\| citype != opt) \
donatien	0:8e01dca41002	677	goto bad; \
donatien	0:8e01dca41002	678	GETCHAR(cichar, p); \
donatien	0:8e01dca41002	679	if (cichar != val) \
donatien	0:8e01dca41002	680	goto bad; \
donatien	0:8e01dca41002	681	}
donatien	0:8e01dca41002	682	#define ACKCICHAP(opt, neg, val, digest) \
donatien	0:8e01dca41002	683	if (neg) { \
donatien	0:8e01dca41002	684	if ((len -= CILEN_CHAP) < 0) \
donatien	0:8e01dca41002	685	goto bad; \
donatien	0:8e01dca41002	686	GETCHAR(citype, p); \
donatien	0:8e01dca41002	687	GETCHAR(cilen, p); \
donatien	0:8e01dca41002	688	if (cilen != CILEN_CHAP \|\| citype != opt) \
donatien	0:8e01dca41002	689	goto bad; \
donatien	0:8e01dca41002	690	GETSHORT(cishort, p); \
donatien	0:8e01dca41002	691	if (cishort != val) \
donatien	0:8e01dca41002	692	goto bad; \
donatien	0:8e01dca41002	693	GETCHAR(cichar, p); \
donatien	0:8e01dca41002	694	if (cichar != digest) \
donatien	0:8e01dca41002	695	goto bad; \
donatien	0:8e01dca41002	696	}
donatien	0:8e01dca41002	697	#define ACKCILONG(opt, neg, val) \
donatien	0:8e01dca41002	698	if (neg) { \
donatien	0:8e01dca41002	699	if ((len -= CILEN_LONG) < 0) \
donatien	0:8e01dca41002	700	goto bad; \
donatien	0:8e01dca41002	701	GETCHAR(citype, p); \
donatien	0:8e01dca41002	702	GETCHAR(cilen, p); \
donatien	0:8e01dca41002	703	if (cilen != CILEN_LONG \|\| citype != opt) \
donatien	0:8e01dca41002	704	goto bad; \
donatien	0:8e01dca41002	705	GETLONG(cilong, p); \
donatien	0:8e01dca41002	706	if (cilong != val) \
donatien	0:8e01dca41002	707	goto bad; \
donatien	0:8e01dca41002	708	}
donatien	0:8e01dca41002	709	#define ACKCILQR(opt, neg, val) \
donatien	0:8e01dca41002	710	if (neg) { \
donatien	0:8e01dca41002	711	if ((len -= CILEN_LQR) < 0) \
donatien	0:8e01dca41002	712	goto bad; \
donatien	0:8e01dca41002	713	GETCHAR(citype, p); \
donatien	0:8e01dca41002	714	GETCHAR(cilen, p); \
donatien	0:8e01dca41002	715	if (cilen != CILEN_LQR \|\| citype != opt) \
donatien	0:8e01dca41002	716	goto bad; \
donatien	0:8e01dca41002	717	GETSHORT(cishort, p); \
donatien	0:8e01dca41002	718	if (cishort != PPP_LQR) \
donatien	0:8e01dca41002	719	goto bad; \
donatien	0:8e01dca41002	720	GETLONG(cilong, p); \
donatien	0:8e01dca41002	721	if (cilong != val) \
donatien	0:8e01dca41002	722	goto bad; \
donatien	0:8e01dca41002	723	}
donatien	0:8e01dca41002	724
donatien	0:8e01dca41002	725	ACKCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
donatien	0:8e01dca41002	726	ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
donatien	0:8e01dca41002	727	ACKCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
donatien	0:8e01dca41002	728	ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
donatien	0:8e01dca41002	729	ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
donatien	0:8e01dca41002	730	ACKCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
donatien	0:8e01dca41002	731	ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
donatien	0:8e01dca41002	732	ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
donatien	0:8e01dca41002	733	ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
donatien	0:8e01dca41002	734
donatien	0:8e01dca41002	735	/*
donatien	0:8e01dca41002	736	* If there are any remaining CIs, then this packet is bad.
donatien	0:8e01dca41002	737	*/
donatien	0:8e01dca41002	738	if (len != 0) {
donatien	0:8e01dca41002	739	goto bad;
donatien	0:8e01dca41002	740	}
donatien	0:8e01dca41002	741	LCPDEBUG(LOG_INFO, ("lcp_acki: Ack\n"));
donatien	0:8e01dca41002	742	return (1);
donatien	0:8e01dca41002	743	bad:
donatien	0:8e01dca41002	744	LCPDEBUG(LOG_WARNING, ("lcp_acki: received bad Ack!\n"));
donatien	0:8e01dca41002	745	return (0);
donatien	0:8e01dca41002	746	}
donatien	0:8e01dca41002	747
donatien	0:8e01dca41002	748
donatien	0:8e01dca41002	749	/*
donatien	0:8e01dca41002	750	* lcp_nakci - Peer has sent a NAK for some of our CIs.
donatien	0:8e01dca41002	751	* This should not modify any state if the Nak is bad
donatien	0:8e01dca41002	752	* or if LCP is in the LS_OPENED state.
donatien	0:8e01dca41002	753	*
donatien	0:8e01dca41002	754	* Returns:
donatien	0:8e01dca41002	755	* 0 - Nak was bad.
donatien	0:8e01dca41002	756	* 1 - Nak was good.
donatien	0:8e01dca41002	757	*/
donatien	0:8e01dca41002	758	static int
donatien	0:8e01dca41002	759	lcp_nakci(fsm f, u_char p, int len)
donatien	0:8e01dca41002	760	{
donatien	0:8e01dca41002	761	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:8e01dca41002	762	lcp_options *wo = &lcp_wantoptions[f->unit];
donatien	0:8e01dca41002	763	u_char citype, cichar, *next;
donatien	0:8e01dca41002	764	u_short cishort;
donatien	0:8e01dca41002	765	u32_t cilong;
donatien	0:8e01dca41002	766	lcp_options no; /* options we've seen Naks for */
donatien	0:8e01dca41002	767	lcp_options try; /* options to request next time */
donatien	0:8e01dca41002	768	int looped_back = 0;
donatien	0:8e01dca41002	769	int cilen;
donatien	0:8e01dca41002	770
donatien	0:8e01dca41002	771	BZERO(&no, sizeof(no));
donatien	0:8e01dca41002	772	try = *go;
donatien	0:8e01dca41002	773
donatien	0:8e01dca41002	774	/*
donatien	0:8e01dca41002	775	* Any Nak'd CIs must be in exactly the same order that we sent.
donatien	0:8e01dca41002	776	* Check packet length and CI length at each step.
donatien	0:8e01dca41002	777	* If we find any deviations, then this packet is bad.
donatien	0:8e01dca41002	778	*/
donatien	0:8e01dca41002	779	#define NAKCIVOID(opt, neg, code) \
donatien	0:8e01dca41002	780	if (go->neg && \
donatien	0:8e01dca41002	781	len >= CILEN_VOID && \
donatien	0:8e01dca41002	782	p[1] == CILEN_VOID && \
donatien	0:8e01dca41002	783	p[0] == opt) { \
donatien	0:8e01dca41002	784	len -= CILEN_VOID; \
donatien	0:8e01dca41002	785	INCPTR(CILEN_VOID, p); \
donatien	0:8e01dca41002	786	no.neg = 1; \
donatien	0:8e01dca41002	787	code \
donatien	0:8e01dca41002	788	}
donatien	0:8e01dca41002	789	#define NAKCICHAP(opt, neg, code) \
donatien	0:8e01dca41002	790	if (go->neg && \
donatien	0:8e01dca41002	791	len >= CILEN_CHAP && \
donatien	0:8e01dca41002	792	p[1] == CILEN_CHAP && \
donatien	0:8e01dca41002	793	p[0] == opt) { \
donatien	0:8e01dca41002	794	len -= CILEN_CHAP; \
donatien	0:8e01dca41002	795	INCPTR(2, p); \
donatien	0:8e01dca41002	796	GETSHORT(cishort, p); \
donatien	0:8e01dca41002	797	GETCHAR(cichar, p); \
donatien	0:8e01dca41002	798	no.neg = 1; \
donatien	0:8e01dca41002	799	code \
donatien	0:8e01dca41002	800	}
donatien	0:8e01dca41002	801	#define NAKCICHAR(opt, neg, code) \
donatien	0:8e01dca41002	802	if (go->neg && \
donatien	0:8e01dca41002	803	len >= CILEN_CHAR && \
donatien	0:8e01dca41002	804	p[1] == CILEN_CHAR && \
donatien	0:8e01dca41002	805	p[0] == opt) { \
donatien	0:8e01dca41002	806	len -= CILEN_CHAR; \
donatien	0:8e01dca41002	807	INCPTR(2, p); \
donatien	0:8e01dca41002	808	GETCHAR(cichar, p); \
donatien	0:8e01dca41002	809	no.neg = 1; \
donatien	0:8e01dca41002	810	code \
donatien	0:8e01dca41002	811	}
donatien	0:8e01dca41002	812	#define NAKCISHORT(opt, neg, code) \
donatien	0:8e01dca41002	813	if (go->neg && \
donatien	0:8e01dca41002	814	len >= CILEN_SHORT && \
donatien	0:8e01dca41002	815	p[1] == CILEN_SHORT && \
donatien	0:8e01dca41002	816	p[0] == opt) { \
donatien	0:8e01dca41002	817	len -= CILEN_SHORT; \
donatien	0:8e01dca41002	818	INCPTR(2, p); \
donatien	0:8e01dca41002	819	GETSHORT(cishort, p); \
donatien	0:8e01dca41002	820	no.neg = 1; \
donatien	0:8e01dca41002	821	code \
donatien	0:8e01dca41002	822	}
donatien	0:8e01dca41002	823	#define NAKCILONG(opt, neg, code) \
donatien	0:8e01dca41002	824	if (go->neg && \
donatien	0:8e01dca41002	825	len >= CILEN_LONG && \
donatien	0:8e01dca41002	826	p[1] == CILEN_LONG && \
donatien	0:8e01dca41002	827	p[0] == opt) { \
donatien	0:8e01dca41002	828	len -= CILEN_LONG; \
donatien	0:8e01dca41002	829	INCPTR(2, p); \
donatien	0:8e01dca41002	830	GETLONG(cilong, p); \
donatien	0:8e01dca41002	831	no.neg = 1; \
donatien	0:8e01dca41002	832	code \
donatien	0:8e01dca41002	833	}
donatien	0:8e01dca41002	834	#define NAKCILQR(opt, neg, code) \
donatien	0:8e01dca41002	835	if (go->neg && \
donatien	0:8e01dca41002	836	len >= CILEN_LQR && \
donatien	0:8e01dca41002	837	p[1] == CILEN_LQR && \
donatien	0:8e01dca41002	838	p[0] == opt) { \
donatien	0:8e01dca41002	839	len -= CILEN_LQR; \
donatien	0:8e01dca41002	840	INCPTR(2, p); \
donatien	0:8e01dca41002	841	GETSHORT(cishort, p); \
donatien	0:8e01dca41002	842	GETLONG(cilong, p); \
donatien	0:8e01dca41002	843	no.neg = 1; \
donatien	0:8e01dca41002	844	code \
donatien	0:8e01dca41002	845	}
donatien	0:8e01dca41002	846
donatien	0:8e01dca41002	847	/*
donatien	0:8e01dca41002	848	* We don't care if they want to send us smaller packets than
donatien	0:8e01dca41002	849	* we want. Therefore, accept any MRU less than what we asked for,
donatien	0:8e01dca41002	850	* but then ignore the new value when setting the MRU in the kernel.
donatien	0:8e01dca41002	851	* If they send us a bigger MRU than what we asked, accept it, up to
donatien	0:8e01dca41002	852	* the limit of the default MRU we'd get if we didn't negotiate.
donatien	0:8e01dca41002	853	*/
donatien	0:8e01dca41002	854	if (go->neg_mru && go->mru != PPP_DEFMRU) {
donatien	0:8e01dca41002	855	NAKCISHORT(CI_MRU, neg_mru,
donatien	0:8e01dca41002	856	if (cishort <= wo->mru \|\| cishort < PPP_DEFMRU) {
donatien	0:8e01dca41002	857	try.mru = cishort;
donatien	0:8e01dca41002	858	}
donatien	0:8e01dca41002	859	);
donatien	0:8e01dca41002	860	}
donatien	0:8e01dca41002	861
donatien	0:8e01dca41002	862	/*
donatien	0:8e01dca41002	863	* Add any characters they want to our (receive-side) asyncmap.
donatien	0:8e01dca41002	864	*/
donatien	0:8e01dca41002	865	if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) {
donatien	0:8e01dca41002	866	NAKCILONG(CI_ASYNCMAP, neg_asyncmap,
donatien	0:8e01dca41002	867	try.asyncmap = go->asyncmap \| cilong;
donatien	0:8e01dca41002	868	);
donatien	0:8e01dca41002	869	}
donatien	0:8e01dca41002	870
donatien	0:8e01dca41002	871	/*
donatien	0:8e01dca41002	872	* If they've nak'd our authentication-protocol, check whether
donatien	0:8e01dca41002	873	* they are proposing a different protocol, or a different
donatien	0:8e01dca41002	874	* hash algorithm for CHAP.
donatien	0:8e01dca41002	875	*/
donatien	0:8e01dca41002	876	if ((go->neg_chap \|\| go->neg_upap)
donatien	0:8e01dca41002	877	&& len >= CILEN_SHORT
donatien	0:8e01dca41002	878	&& p[0] == CI_AUTHTYPE && p[1] >= CILEN_SHORT && p[1] <= len) {
donatien	0:8e01dca41002	879	cilen = p[1];
donatien	0:8e01dca41002	880	len -= cilen;
donatien	0:8e01dca41002	881	no.neg_chap = go->neg_chap;
donatien	0:8e01dca41002	882	no.neg_upap = go->neg_upap;
donatien	0:8e01dca41002	883	INCPTR(2, p);
donatien	0:8e01dca41002	884	GETSHORT(cishort, p);
donatien	0:8e01dca41002	885	if (cishort == PPP_PAP && cilen == CILEN_SHORT) {
donatien	0:8e01dca41002	886	/*
donatien	0:8e01dca41002	887	* If we were asking for CHAP, they obviously don't want to do it.
donatien	0:8e01dca41002	888	* If we weren't asking for CHAP, then we were asking for PAP,
donatien	0:8e01dca41002	889	* in which case this Nak is bad.
donatien	0:8e01dca41002	890	*/
donatien	0:8e01dca41002	891	if (!go->neg_chap) {
donatien	0:8e01dca41002	892	goto bad;
donatien	0:8e01dca41002	893	}
donatien	0:8e01dca41002	894	try.neg_chap = 0;
donatien	0:8e01dca41002	895
donatien	0:8e01dca41002	896	} else if (cishort == PPP_CHAP && cilen == CILEN_CHAP) {
donatien	0:8e01dca41002	897	GETCHAR(cichar, p);
donatien	0:8e01dca41002	898	if (go->neg_chap) {
donatien	0:8e01dca41002	899	/*
donatien	0:8e01dca41002	900	* We were asking for CHAP/MD5; they must want a different
donatien	0:8e01dca41002	901	* algorithm. If they can't do MD5, we'll have to stop
donatien	0:8e01dca41002	902	* asking for CHAP.
donatien	0:8e01dca41002	903	*/
donatien	0:8e01dca41002	904	if (cichar != go->chap_mdtype) {
donatien	0:8e01dca41002	905	try.neg_chap = 0;
donatien	0:8e01dca41002	906	}
donatien	0:8e01dca41002	907	} else {
donatien	0:8e01dca41002	908	/*
donatien	0:8e01dca41002	909	* Stop asking for PAP if we were asking for it.
donatien	0:8e01dca41002	910	*/
donatien	0:8e01dca41002	911	try.neg_upap = 0;
donatien	0:8e01dca41002	912	}
donatien	0:8e01dca41002	913
donatien	0:8e01dca41002	914	} else {
donatien	0:8e01dca41002	915	/*
donatien	0:8e01dca41002	916	* We don't recognize what they're suggesting.
donatien	0:8e01dca41002	917	* Stop asking for what we were asking for.
donatien	0:8e01dca41002	918	*/
donatien	0:8e01dca41002	919	if (go->neg_chap) {
donatien	0:8e01dca41002	920	try.neg_chap = 0;
donatien	0:8e01dca41002	921	} else {
donatien	0:8e01dca41002	922	try.neg_upap = 0;
donatien	0:8e01dca41002	923	}
donatien	0:8e01dca41002	924	p += cilen - CILEN_SHORT;
donatien	0:8e01dca41002	925	}
donatien	0:8e01dca41002	926	}
donatien	0:8e01dca41002	927
donatien	0:8e01dca41002	928	/*
donatien	0:8e01dca41002	929	* If they can't cope with our link quality protocol, we'll have
donatien	0:8e01dca41002	930	* to stop asking for LQR. We haven't got any other protocol.
donatien	0:8e01dca41002	931	* If they Nak the reporting period, take their value XXX ?
donatien	0:8e01dca41002	932	*/
donatien	0:8e01dca41002	933	NAKCILQR(CI_QUALITY, neg_lqr,
donatien	0:8e01dca41002	934	if (cishort != PPP_LQR) {
donatien	0:8e01dca41002	935	try.neg_lqr = 0;
donatien	0:8e01dca41002	936	} else {
donatien	0:8e01dca41002	937	try.lqr_period = cilong;
donatien	0:8e01dca41002	938	}
donatien	0:8e01dca41002	939	);
donatien	0:8e01dca41002	940
donatien	0:8e01dca41002	941	/*
donatien	0:8e01dca41002	942	* Only implementing CBCP...not the rest of the callback options
donatien	0:8e01dca41002	943	*/
donatien	0:8e01dca41002	944	NAKCICHAR(CI_CALLBACK, neg_cbcp,
donatien	0:8e01dca41002	945	try.neg_cbcp = 0;
donatien	0:8e01dca41002	946	);
donatien	0:8e01dca41002	947
donatien	0:8e01dca41002	948	/*
donatien	0:8e01dca41002	949	* Check for a looped-back line.
donatien	0:8e01dca41002	950	*/
donatien	0:8e01dca41002	951	NAKCILONG(CI_MAGICNUMBER, neg_magicnumber,
donatien	0:8e01dca41002	952	try.magicnumber = magic();
donatien	0:8e01dca41002	953	looped_back = 1;
donatien	0:8e01dca41002	954	);
donatien	0:8e01dca41002	955
donatien	0:8e01dca41002	956	/*
donatien	0:8e01dca41002	957	* Peer shouldn't send Nak for protocol compression or
donatien	0:8e01dca41002	958	* address/control compression requests; they should send
donatien	0:8e01dca41002	959	* a Reject instead. If they send a Nak, treat it as a Reject.
donatien	0:8e01dca41002	960	*/
donatien	0:8e01dca41002	961	NAKCIVOID(CI_PCOMPRESSION, neg_pcompression,
donatien	0:8e01dca41002	962	try.neg_pcompression = 0;
donatien	0:8e01dca41002	963	);
donatien	0:8e01dca41002	964	NAKCIVOID(CI_ACCOMPRESSION, neg_accompression,
donatien	0:8e01dca41002	965	try.neg_accompression = 0;
donatien	0:8e01dca41002	966	);
donatien	0:8e01dca41002	967
donatien	0:8e01dca41002	968	/*
donatien	0:8e01dca41002	969	* There may be remaining CIs, if the peer is requesting negotiation
donatien	0:8e01dca41002	970	* on an option that we didn't include in our request packet.
donatien	0:8e01dca41002	971	* If we see an option that we requested, or one we've already seen
donatien	0:8e01dca41002	972	* in this packet, then this packet is bad.
donatien	0:8e01dca41002	973	* If we wanted to respond by starting to negotiate on the requested
donatien	0:8e01dca41002	974	* option(s), we could, but we don't, because except for the
donatien	0:8e01dca41002	975	* authentication type and quality protocol, if we are not negotiating
donatien	0:8e01dca41002	976	* an option, it is because we were told not to.
donatien	0:8e01dca41002	977	* For the authentication type, the Nak from the peer means
donatien	0:8e01dca41002	978	* `let me authenticate myself with you' which is a bit pointless.
donatien	0:8e01dca41002	979	* For the quality protocol, the Nak means `ask me to send you quality
donatien	0:8e01dca41002	980	* reports', but if we didn't ask for them, we don't want them.
donatien	0:8e01dca41002	981	* An option we don't recognize represents the peer asking to
donatien	0:8e01dca41002	982	* negotiate some option we don't support, so ignore it.
donatien	0:8e01dca41002	983	*/
donatien	0:8e01dca41002	984	while (len > CILEN_VOID) {
donatien	0:8e01dca41002	985	GETCHAR(citype, p);
donatien	0:8e01dca41002	986	GETCHAR(cilen, p);
donatien	0:8e01dca41002	987	if (cilen < CILEN_VOID \|\| (len -= cilen) < 0) {
donatien	0:8e01dca41002	988	goto bad;
donatien	0:8e01dca41002	989	}
donatien	0:8e01dca41002	990	next = p + cilen - 2;
donatien	0:8e01dca41002	991
donatien	0:8e01dca41002	992	switch (citype) {
donatien	0:8e01dca41002	993	case CI_MRU:
donatien	0:8e01dca41002	994	if ((go->neg_mru && go->mru != PPP_DEFMRU)
donatien	0:8e01dca41002	995	\|\| no.neg_mru \|\| cilen != CILEN_SHORT) {
donatien	0:8e01dca41002	996	goto bad;
donatien	0:8e01dca41002	997	}
donatien	0:8e01dca41002	998	GETSHORT(cishort, p);
donatien	0:8e01dca41002	999	if (cishort < PPP_DEFMRU) {
donatien	0:8e01dca41002	1000	try.mru = cishort;
donatien	0:8e01dca41002	1001	}
donatien	0:8e01dca41002	1002	break;
donatien	0:8e01dca41002	1003	case CI_ASYNCMAP:
donatien	0:8e01dca41002	1004	if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl)
donatien	0:8e01dca41002	1005	\|\| no.neg_asyncmap \|\| cilen != CILEN_LONG) {
donatien	0:8e01dca41002	1006	goto bad;
donatien	0:8e01dca41002	1007	}
donatien	0:8e01dca41002	1008	break;
donatien	0:8e01dca41002	1009	case CI_AUTHTYPE:
donatien	0:8e01dca41002	1010	if (go->neg_chap \|\| no.neg_chap \|\| go->neg_upap \|\| no.neg_upap) {
donatien	0:8e01dca41002	1011	goto bad;
donatien	0:8e01dca41002	1012	}
donatien	0:8e01dca41002	1013	break;
donatien	0:8e01dca41002	1014	case CI_MAGICNUMBER:
donatien	0:8e01dca41002	1015	if (go->neg_magicnumber \|\| no.neg_magicnumber \|\|
donatien	0:8e01dca41002	1016	cilen != CILEN_LONG) {
donatien	0:8e01dca41002	1017	goto bad;
donatien	0:8e01dca41002	1018	}
donatien	0:8e01dca41002	1019	break;
donatien	0:8e01dca41002	1020	case CI_PCOMPRESSION:
donatien	0:8e01dca41002	1021	if (go->neg_pcompression \|\| no.neg_pcompression
donatien	0:8e01dca41002	1022	\|\| cilen != CILEN_VOID) {
donatien	0:8e01dca41002	1023	goto bad;
donatien	0:8e01dca41002	1024	}
donatien	0:8e01dca41002	1025	break;
donatien	0:8e01dca41002	1026	case CI_ACCOMPRESSION:
donatien	0:8e01dca41002	1027	if (go->neg_accompression \|\| no.neg_accompression
donatien	0:8e01dca41002	1028	\|\| cilen != CILEN_VOID) {
donatien	0:8e01dca41002	1029	goto bad;
donatien	0:8e01dca41002	1030	}
donatien	0:8e01dca41002	1031	break;
donatien	0:8e01dca41002	1032	case CI_QUALITY:
donatien	0:8e01dca41002	1033	if (go->neg_lqr \|\| no.neg_lqr \|\| cilen != CILEN_LQR) {
donatien	0:8e01dca41002	1034	goto bad;
donatien	0:8e01dca41002	1035	}
donatien	0:8e01dca41002	1036	break;
donatien	0:8e01dca41002	1037	}
donatien	0:8e01dca41002	1038	p = next;
donatien	0:8e01dca41002	1039	}
donatien	0:8e01dca41002	1040
donatien	0:8e01dca41002	1041	/* If there is still anything left, this packet is bad. */
donatien	0:8e01dca41002	1042	if (len != 0) {
donatien	0:8e01dca41002	1043	goto bad;
donatien	0:8e01dca41002	1044	}
donatien	0:8e01dca41002	1045
donatien	0:8e01dca41002	1046	/*
donatien	0:8e01dca41002	1047	* OK, the Nak is good. Now we can update state.
donatien	0:8e01dca41002	1048	*/
donatien	0:8e01dca41002	1049	if (f->state != LS_OPENED) {
donatien	0:8e01dca41002	1050	if (looped_back) {
donatien	0:8e01dca41002	1051	if (++try.numloops >= lcp_loopbackfail) {
donatien	0:8e01dca41002	1052	LCPDEBUG(LOG_NOTICE, ("Serial line is looped back.\n"));
donatien	0:8e01dca41002	1053	lcp_close(f->unit, "Loopback detected");
donatien	0:8e01dca41002	1054	}
donatien	0:8e01dca41002	1055	} else {
donatien	0:8e01dca41002	1056	try.numloops = 0;
donatien	0:8e01dca41002	1057	}
donatien	0:8e01dca41002	1058	*go = try;
donatien	0:8e01dca41002	1059	}
donatien	0:8e01dca41002	1060
donatien	0:8e01dca41002	1061	return 1;
donatien	0:8e01dca41002	1062
donatien	0:8e01dca41002	1063	bad:
donatien	0:8e01dca41002	1064	LCPDEBUG(LOG_WARNING, ("lcp_nakci: received bad Nak!\n"));
donatien	0:8e01dca41002	1065	return 0;
donatien	0:8e01dca41002	1066	}
donatien	0:8e01dca41002	1067
donatien	0:8e01dca41002	1068
donatien	0:8e01dca41002	1069	/*
donatien	0:8e01dca41002	1070	* lcp_rejci - Peer has Rejected some of our CIs.
donatien	0:8e01dca41002	1071	* This should not modify any state if the Reject is bad
donatien	0:8e01dca41002	1072	* or if LCP is in the LS_OPENED state.
donatien	0:8e01dca41002	1073	*
donatien	0:8e01dca41002	1074	* Returns:
donatien	0:8e01dca41002	1075	* 0 - Reject was bad.
donatien	0:8e01dca41002	1076	* 1 - Reject was good.
donatien	0:8e01dca41002	1077	*/
donatien	0:8e01dca41002	1078	static int
donatien	0:8e01dca41002	1079	lcp_rejci(fsm f, u_char p, int len)
donatien	0:8e01dca41002	1080	{
donatien	0:8e01dca41002	1081	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:8e01dca41002	1082	u_char cichar;
donatien	0:8e01dca41002	1083	u_short cishort;
donatien	0:8e01dca41002	1084	u32_t cilong;
donatien	0:8e01dca41002	1085	lcp_options try; /* options to request next time */
donatien	0:8e01dca41002	1086
donatien	0:8e01dca41002	1087	try = *go;
donatien	0:8e01dca41002	1088
donatien	0:8e01dca41002	1089	/*
donatien	0:8e01dca41002	1090	* Any Rejected CIs must be in exactly the same order that we sent.
donatien	0:8e01dca41002	1091	* Check packet length and CI length at each step.
donatien	0:8e01dca41002	1092	* If we find any deviations, then this packet is bad.
donatien	0:8e01dca41002	1093	*/
donatien	0:8e01dca41002	1094	#define REJCIVOID(opt, neg) \
donatien	0:8e01dca41002	1095	if (go->neg && \
donatien	0:8e01dca41002	1096	len >= CILEN_VOID && \
donatien	0:8e01dca41002	1097	p[1] == CILEN_VOID && \
donatien	0:8e01dca41002	1098	p[0] == opt) { \
donatien	0:8e01dca41002	1099	len -= CILEN_VOID; \
donatien	0:8e01dca41002	1100	INCPTR(CILEN_VOID, p); \
donatien	0:8e01dca41002	1101	try.neg = 0; \
donatien	0:8e01dca41002	1102	LCPDEBUG(LOG_INFO, ("lcp_rejci: void opt %d rejected\n", opt)); \
donatien	0:8e01dca41002	1103	}
donatien	0:8e01dca41002	1104	#define REJCISHORT(opt, neg, val) \
donatien	0:8e01dca41002	1105	if (go->neg && \
donatien	0:8e01dca41002	1106	len >= CILEN_SHORT && \
donatien	0:8e01dca41002	1107	p[1] == CILEN_SHORT && \
donatien	0:8e01dca41002	1108	p[0] == opt) { \
donatien	0:8e01dca41002	1109	len -= CILEN_SHORT; \
donatien	0:8e01dca41002	1110	INCPTR(2, p); \
donatien	0:8e01dca41002	1111	GETSHORT(cishort, p); \
donatien	0:8e01dca41002	1112	/* Check rejected value. */ \
donatien	0:8e01dca41002	1113	if (cishort != val) { \
donatien	0:8e01dca41002	1114	goto bad; \
donatien	0:8e01dca41002	1115	} \
donatien	0:8e01dca41002	1116	try.neg = 0; \
donatien	0:8e01dca41002	1117	LCPDEBUG(LOG_INFO, ("lcp_rejci: short opt %d rejected\n", opt)); \
donatien	0:8e01dca41002	1118	}
donatien	0:8e01dca41002	1119	#define REJCICHAP(opt, neg, val, digest) \
donatien	0:8e01dca41002	1120	if (go->neg && \
donatien	0:8e01dca41002	1121	len >= CILEN_CHAP && \
donatien	0:8e01dca41002	1122	p[1] == CILEN_CHAP && \
donatien	0:8e01dca41002	1123	p[0] == opt) { \
donatien	0:8e01dca41002	1124	len -= CILEN_CHAP; \
donatien	0:8e01dca41002	1125	INCPTR(2, p); \
donatien	0:8e01dca41002	1126	GETSHORT(cishort, p); \
donatien	0:8e01dca41002	1127	GETCHAR(cichar, p); \
donatien	0:8e01dca41002	1128	/* Check rejected value. */ \
donatien	0:8e01dca41002	1129	if (cishort != val \|\| cichar != digest) { \
donatien	0:8e01dca41002	1130	goto bad; \
donatien	0:8e01dca41002	1131	} \
donatien	0:8e01dca41002	1132	try.neg = 0; \
donatien	0:8e01dca41002	1133	try.neg_upap = 0; \
donatien	0:8e01dca41002	1134	LCPDEBUG(LOG_INFO, ("lcp_rejci: chap opt %d rejected\n", opt)); \
donatien	0:8e01dca41002	1135	}
donatien	0:8e01dca41002	1136	#define REJCILONG(opt, neg, val) \
donatien	0:8e01dca41002	1137	if (go->neg && \
donatien	0:8e01dca41002	1138	len >= CILEN_LONG && \
donatien	0:8e01dca41002	1139	p[1] == CILEN_LONG && \
donatien	0:8e01dca41002	1140	p[0] == opt) { \
donatien	0:8e01dca41002	1141	len -= CILEN_LONG; \
donatien	0:8e01dca41002	1142	INCPTR(2, p); \
donatien	0:8e01dca41002	1143	GETLONG(cilong, p); \
donatien	0:8e01dca41002	1144	/* Check rejected value. */ \
donatien	0:8e01dca41002	1145	if (cilong != val) { \
donatien	0:8e01dca41002	1146	goto bad; \
donatien	0:8e01dca41002	1147	} \
donatien	0:8e01dca41002	1148	try.neg = 0; \
donatien	0:8e01dca41002	1149	LCPDEBUG(LOG_INFO, ("lcp_rejci: long opt %d rejected\n", opt)); \
donatien	0:8e01dca41002	1150	}
donatien	0:8e01dca41002	1151	#define REJCILQR(opt, neg, val) \
donatien	0:8e01dca41002	1152	if (go->neg && \
donatien	0:8e01dca41002	1153	len >= CILEN_LQR && \
donatien	0:8e01dca41002	1154	p[1] == CILEN_LQR && \
donatien	0:8e01dca41002	1155	p[0] == opt) { \
donatien	0:8e01dca41002	1156	len -= CILEN_LQR; \
donatien	0:8e01dca41002	1157	INCPTR(2, p); \
donatien	0:8e01dca41002	1158	GETSHORT(cishort, p); \
donatien	0:8e01dca41002	1159	GETLONG(cilong, p); \
donatien	0:8e01dca41002	1160	/* Check rejected value. */ \
donatien	0:8e01dca41002	1161	if (cishort != PPP_LQR \|\| cilong != val) { \
donatien	0:8e01dca41002	1162	goto bad; \
donatien	0:8e01dca41002	1163	} \
donatien	0:8e01dca41002	1164	try.neg = 0; \
donatien	0:8e01dca41002	1165	LCPDEBUG(LOG_INFO, ("lcp_rejci: LQR opt %d rejected\n", opt)); \
donatien	0:8e01dca41002	1166	}
donatien	0:8e01dca41002	1167	#define REJCICBCP(opt, neg, val) \
donatien	0:8e01dca41002	1168	if (go->neg && \
donatien	0:8e01dca41002	1169	len >= CILEN_CBCP && \
donatien	0:8e01dca41002	1170	p[1] == CILEN_CBCP && \
donatien	0:8e01dca41002	1171	p[0] == opt) { \
donatien	0:8e01dca41002	1172	len -= CILEN_CBCP; \
donatien	0:8e01dca41002	1173	INCPTR(2, p); \
donatien	0:8e01dca41002	1174	GETCHAR(cichar, p); \
donatien	0:8e01dca41002	1175	/* Check rejected value. */ \
donatien	0:8e01dca41002	1176	if (cichar != val) { \
donatien	0:8e01dca41002	1177	goto bad; \
donatien	0:8e01dca41002	1178	} \
donatien	0:8e01dca41002	1179	try.neg = 0; \
donatien	0:8e01dca41002	1180	LCPDEBUG(LOG_INFO, ("lcp_rejci: Callback opt %d rejected\n", opt)); \
donatien	0:8e01dca41002	1181	}
donatien	0:8e01dca41002	1182
donatien	0:8e01dca41002	1183	REJCISHORT(CI_MRU, neg_mru, go->mru);
donatien	0:8e01dca41002	1184	REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap);
donatien	0:8e01dca41002	1185	REJCICHAP(CI_AUTHTYPE, neg_chap, PPP_CHAP, go->chap_mdtype);
donatien	0:8e01dca41002	1186	if (!go->neg_chap) {
donatien	0:8e01dca41002	1187	REJCISHORT(CI_AUTHTYPE, neg_upap, PPP_PAP);
donatien	0:8e01dca41002	1188	}
donatien	0:8e01dca41002	1189	REJCILQR(CI_QUALITY, neg_lqr, go->lqr_period);
donatien	0:8e01dca41002	1190	REJCICBCP(CI_CALLBACK, neg_cbcp, CBCP_OPT);
donatien	0:8e01dca41002	1191	REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber);
donatien	0:8e01dca41002	1192	REJCIVOID(CI_PCOMPRESSION, neg_pcompression);
donatien	0:8e01dca41002	1193	REJCIVOID(CI_ACCOMPRESSION, neg_accompression);
donatien	0:8e01dca41002	1194
donatien	0:8e01dca41002	1195	/*
donatien	0:8e01dca41002	1196	* If there are any remaining CIs, then this packet is bad.
donatien	0:8e01dca41002	1197	*/
donatien	0:8e01dca41002	1198	if (len != 0) {
donatien	0:8e01dca41002	1199	goto bad;
donatien	0:8e01dca41002	1200	}
donatien	0:8e01dca41002	1201	/*
donatien	0:8e01dca41002	1202	* Now we can update state.
donatien	0:8e01dca41002	1203	*/
donatien	0:8e01dca41002	1204	if (f->state != LS_OPENED) {
donatien	0:8e01dca41002	1205	*go = try;
donatien	0:8e01dca41002	1206	}
donatien	0:8e01dca41002	1207	return 1;
donatien	0:8e01dca41002	1208
donatien	0:8e01dca41002	1209	bad:
donatien	0:8e01dca41002	1210	LCPDEBUG(LOG_WARNING, ("lcp_rejci: received bad Reject!\n"));
donatien	0:8e01dca41002	1211	return 0;
donatien	0:8e01dca41002	1212	}
donatien	0:8e01dca41002	1213
donatien	0:8e01dca41002	1214
donatien	0:8e01dca41002	1215	/*
donatien	0:8e01dca41002	1216	* lcp_reqci - Check the peer's requested CIs and send appropriate response.
donatien	0:8e01dca41002	1217	*
donatien	0:8e01dca41002	1218	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
donatien	0:8e01dca41002	1219	* appropriately. If reject_if_disagree is non-zero, doesn't return
donatien	0:8e01dca41002	1220	* CONFNAK; returns CONFREJ if it can't return CONFACK.
donatien	0:8e01dca41002	1221	*/
donatien	0:8e01dca41002	1222	static int
donatien	0:8e01dca41002	1223	lcp_reqci(fsm *f,
donatien	0:8e01dca41002	1224	u_char inp, / Requested CIs */
donatien	0:8e01dca41002	1225	int lenp, / Length of requested CIs */
donatien	0:8e01dca41002	1226	int reject_if_disagree)
donatien	0:8e01dca41002	1227	{
donatien	0:8e01dca41002	1228	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:8e01dca41002	1229	lcp_options *ho = &lcp_hisoptions[f->unit];
donatien	0:8e01dca41002	1230	lcp_options *ao = &lcp_allowoptions[f->unit];
donatien	0:8e01dca41002	1231	u_char cip, next; /* Pointer to current and next CIs */
donatien	0:8e01dca41002	1232	int cilen, citype; /* Parsed len, type */
donatien	0:8e01dca41002	1233	u_char cichar; /* Parsed char value */
donatien	0:8e01dca41002	1234	u_short cishort; /* Parsed short value */
donatien	0:8e01dca41002	1235	u32_t cilong; /* Parse long value */
donatien	0:8e01dca41002	1236	int rc = CONFACK; /* Final packet return code */
donatien	0:8e01dca41002	1237	int orc; /* Individual option return code */
donatien	0:8e01dca41002	1238	u_char p; / Pointer to next char to parse */
donatien	0:8e01dca41002	1239	u_char rejp; / Pointer to next char in reject frame */
donatien	0:8e01dca41002	1240	u_char nakp; / Pointer to next char in Nak frame */
donatien	0:8e01dca41002	1241	int l = lenp; / Length left */
donatien	0:8e01dca41002	1242	#if TRACELCP > 0
donatien	0:8e01dca41002	1243	char traceBuf[80];
donatien	0:8e01dca41002	1244	size_t traceNdx = 0;
donatien	0:8e01dca41002	1245	#endif
donatien	0:8e01dca41002	1246
donatien	0:8e01dca41002	1247	/*
donatien	0:8e01dca41002	1248	* Reset all his options.
donatien	0:8e01dca41002	1249	*/
donatien	0:8e01dca41002	1250	BZERO(ho, sizeof(*ho));
donatien	0:8e01dca41002	1251
donatien	0:8e01dca41002	1252	/*
donatien	0:8e01dca41002	1253	* Process all his options.
donatien	0:8e01dca41002	1254	*/
donatien	0:8e01dca41002	1255	next = inp;
donatien	0:8e01dca41002	1256	nakp = nak_buffer;
donatien	0:8e01dca41002	1257	rejp = inp;
donatien	0:8e01dca41002	1258	while (l) {
donatien	0:8e01dca41002	1259	orc = CONFACK; /* Assume success */
donatien	0:8e01dca41002	1260	cip = p = next; /* Remember begining of CI */
donatien	0:8e01dca41002	1261	if (l < 2 \|\| /* Not enough data for CI header or */
donatien	0:8e01dca41002	1262	p[1] < 2 \|\| /* CI length too small or */
donatien	0:8e01dca41002	1263	p[1] > l) { /* CI length too big? */
donatien	0:8e01dca41002	1264	LCPDEBUG(LOG_WARNING, ("lcp_reqci: bad CI length!\n"));
donatien	0:8e01dca41002	1265	orc = CONFREJ; /* Reject bad CI */
donatien	0:8e01dca41002	1266	cilen = l; /* Reject till end of packet */
donatien	0:8e01dca41002	1267	l = 0; /* Don't loop again */
donatien	0:8e01dca41002	1268	citype = 0;
donatien	0:8e01dca41002	1269	goto endswitch;
donatien	0:8e01dca41002	1270	}
donatien	0:8e01dca41002	1271	GETCHAR(citype, p); /* Parse CI type */
donatien	0:8e01dca41002	1272	GETCHAR(cilen, p); /* Parse CI length */
donatien	0:8e01dca41002	1273	l -= cilen; /* Adjust remaining length */
donatien	0:8e01dca41002	1274	next += cilen; /* Step to next CI */
donatien	0:8e01dca41002	1275
donatien	0:8e01dca41002	1276	switch (citype) { /* Check CI type */
donatien	0:8e01dca41002	1277	case CI_MRU:
donatien	0:8e01dca41002	1278	if (!ao->neg_mru) { /* Allow option? */
donatien	0:8e01dca41002	1279	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - not allowed\n"));
donatien	0:8e01dca41002	1280	orc = CONFREJ; /* Reject CI */
donatien	0:8e01dca41002	1281	break;
donatien	0:8e01dca41002	1282	} else if (cilen != CILEN_SHORT) { /* Check CI length */
donatien	0:8e01dca41002	1283	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - bad length\n"));
donatien	0:8e01dca41002	1284	orc = CONFREJ; /* Reject CI */
donatien	0:8e01dca41002	1285	break;
donatien	0:8e01dca41002	1286	}
donatien	0:8e01dca41002	1287	GETSHORT(cishort, p); /* Parse MRU */
donatien	0:8e01dca41002	1288
donatien	0:8e01dca41002	1289	/*
donatien	0:8e01dca41002	1290	* He must be able to receive at least our minimum.
donatien	0:8e01dca41002	1291	* No need to check a maximum. If he sends a large number,
donatien	0:8e01dca41002	1292	* we'll just ignore it.
donatien	0:8e01dca41002	1293	*/
donatien	0:8e01dca41002	1294	if (cishort < PPP_MINMRU) {
donatien	0:8e01dca41002	1295	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak - MRU too small\n"));
donatien	0:8e01dca41002	1296	orc = CONFNAK; /* Nak CI */
donatien	0:8e01dca41002	1297	PUTCHAR(CI_MRU, nakp);
donatien	0:8e01dca41002	1298	PUTCHAR(CILEN_SHORT, nakp);
donatien	0:8e01dca41002	1299	PUTSHORT(PPP_MINMRU, nakp); /* Give him a hint */
donatien	0:8e01dca41002	1300	break;
donatien	0:8e01dca41002	1301	}
donatien	0:8e01dca41002	1302	ho->neg_mru = 1; /* Remember he sent MRU */
donatien	0:8e01dca41002	1303	ho->mru = cishort; /* And remember value */
donatien	0:8e01dca41002	1304	#if TRACELCP > 0
donatien	0:8e01dca41002	1305	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MRU %d", cishort);
donatien	0:8e01dca41002	1306	traceNdx = strlen(traceBuf);
donatien	0:8e01dca41002	1307	#endif
donatien	0:8e01dca41002	1308	break;
donatien	0:8e01dca41002	1309
donatien	0:8e01dca41002	1310	case CI_ASYNCMAP:
donatien	0:8e01dca41002	1311	if (!ao->neg_asyncmap) {
donatien	0:8e01dca41002	1312	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP not allowed\n"));
donatien	0:8e01dca41002	1313	orc = CONFREJ;
donatien	0:8e01dca41002	1314	break;
donatien	0:8e01dca41002	1315	} else if (cilen != CILEN_LONG) {
donatien	0:8e01dca41002	1316	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP bad length\n"));
donatien	0:8e01dca41002	1317	orc = CONFREJ;
donatien	0:8e01dca41002	1318	break;
donatien	0:8e01dca41002	1319	}
donatien	0:8e01dca41002	1320	GETLONG(cilong, p);
donatien	0:8e01dca41002	1321
donatien	0:8e01dca41002	1322	/*
donatien	0:8e01dca41002	1323	* Asyncmap must have set at least the bits
donatien	0:8e01dca41002	1324	* which are set in lcp_allowoptions[unit].asyncmap.
donatien	0:8e01dca41002	1325	*/
donatien	0:8e01dca41002	1326	if ((ao->asyncmap & ~cilong) != 0) {
donatien	0:8e01dca41002	1327	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak ASYNCMAP %lX missing %lX\n",
donatien	0:8e01dca41002	1328	cilong, ao->asyncmap));
donatien	0:8e01dca41002	1329	orc = CONFNAK;
donatien	0:8e01dca41002	1330	PUTCHAR(CI_ASYNCMAP, nakp);
donatien	0:8e01dca41002	1331	PUTCHAR(CILEN_LONG, nakp);
donatien	0:8e01dca41002	1332	PUTLONG(ao->asyncmap \| cilong, nakp);
donatien	0:8e01dca41002	1333	break;
donatien	0:8e01dca41002	1334	}
donatien	0:8e01dca41002	1335	ho->neg_asyncmap = 1;
donatien	0:8e01dca41002	1336	ho->asyncmap = cilong;
donatien	0:8e01dca41002	1337	#if TRACELCP > 0
donatien	0:8e01dca41002	1338	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ASYNCMAP=%lX", cilong);
donatien	0:8e01dca41002	1339	traceNdx = strlen(traceBuf);
donatien	0:8e01dca41002	1340	#endif
donatien	0:8e01dca41002	1341	break;
donatien	0:8e01dca41002	1342
donatien	0:8e01dca41002	1343	case CI_AUTHTYPE:
donatien	0:8e01dca41002	1344	if (cilen < CILEN_SHORT) {
donatien	0:8e01dca41002	1345	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE missing arg\n"));
donatien	0:8e01dca41002	1346	orc = CONFREJ;
donatien	0:8e01dca41002	1347	break;
donatien	0:8e01dca41002	1348	} else if (!(ao->neg_upap \|\| ao->neg_chap)) {
donatien	0:8e01dca41002	1349	/*
donatien	0:8e01dca41002	1350	* Reject the option if we're not willing to authenticate.
donatien	0:8e01dca41002	1351	*/
donatien	0:8e01dca41002	1352	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE not allowed\n"));
donatien	0:8e01dca41002	1353	orc = CONFREJ;
donatien	0:8e01dca41002	1354	break;
donatien	0:8e01dca41002	1355	}
donatien	0:8e01dca41002	1356	GETSHORT(cishort, p);
donatien	0:8e01dca41002	1357
donatien	0:8e01dca41002	1358	/*
donatien	0:8e01dca41002	1359	* Authtype must be UPAP or CHAP.
donatien	0:8e01dca41002	1360	*
donatien	0:8e01dca41002	1361	* Note: if both ao->neg_upap and ao->neg_chap are set,
donatien	0:8e01dca41002	1362	* and the peer sends a Configure-Request with two
donatien	0:8e01dca41002	1363	* authenticate-protocol requests, one for CHAP and one
donatien	0:8e01dca41002	1364	* for UPAP, then we will reject the second request.
donatien	0:8e01dca41002	1365	* Whether we end up doing CHAP or UPAP depends then on
donatien	0:8e01dca41002	1366	* the ordering of the CIs in the peer's Configure-Request.
donatien	0:8e01dca41002	1367	*/
donatien	0:8e01dca41002	1368
donatien	0:8e01dca41002	1369	if (cishort == PPP_PAP) {
donatien	0:8e01dca41002	1370	if (ho->neg_chap) { /* we've already accepted CHAP */
donatien	0:8e01dca41002	1371	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP already accepted\n"));
donatien	0:8e01dca41002	1372	orc = CONFREJ;
donatien	0:8e01dca41002	1373	break;
donatien	0:8e01dca41002	1374	} else if (cilen != CILEN_SHORT) {
donatien	0:8e01dca41002	1375	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP bad len\n"));
donatien	0:8e01dca41002	1376	orc = CONFREJ;
donatien	0:8e01dca41002	1377	break;
donatien	0:8e01dca41002	1378	}
donatien	0:8e01dca41002	1379	if (!ao->neg_upap) { /* we don't want to do PAP */
donatien	0:8e01dca41002	1380	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE PAP not allowed\n"));
donatien	0:8e01dca41002	1381	orc = CONFNAK; /* NAK it and suggest CHAP */
donatien	0:8e01dca41002	1382	PUTCHAR(CI_AUTHTYPE, nakp);
donatien	0:8e01dca41002	1383	PUTCHAR(CILEN_CHAP, nakp);
donatien	0:8e01dca41002	1384	PUTSHORT(PPP_CHAP, nakp);
donatien	0:8e01dca41002	1385	PUTCHAR(ao->chap_mdtype, nakp);
donatien	0:8e01dca41002	1386	break;
donatien	0:8e01dca41002	1387	}
donatien	0:8e01dca41002	1388	ho->neg_upap = 1;
donatien	0:8e01dca41002	1389	#if TRACELCP > 0
donatien	0:8e01dca41002	1390	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PAP (%X)", cishort);
donatien	0:8e01dca41002	1391	traceNdx = strlen(traceBuf);
donatien	0:8e01dca41002	1392	#endif
donatien	0:8e01dca41002	1393	break;
donatien	0:8e01dca41002	1394	}
donatien	0:8e01dca41002	1395	if (cishort == PPP_CHAP) {
donatien	0:8e01dca41002	1396	if (ho->neg_upap) { /* we've already accepted PAP */
donatien	0:8e01dca41002	1397	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP accepted PAP\n"));
donatien	0:8e01dca41002	1398	orc = CONFREJ;
donatien	0:8e01dca41002	1399	break;
donatien	0:8e01dca41002	1400	} else if (cilen != CILEN_CHAP) {
donatien	0:8e01dca41002	1401	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP bad len\n"));
donatien	0:8e01dca41002	1402	orc = CONFREJ;
donatien	0:8e01dca41002	1403	break;
donatien	0:8e01dca41002	1404	}
donatien	0:8e01dca41002	1405	if (!ao->neg_chap) { /* we don't want to do CHAP */
donatien	0:8e01dca41002	1406	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP not allowed\n"));
donatien	0:8e01dca41002	1407	orc = CONFNAK; /* NAK it and suggest PAP */
donatien	0:8e01dca41002	1408	PUTCHAR(CI_AUTHTYPE, nakp);
donatien	0:8e01dca41002	1409	PUTCHAR(CILEN_SHORT, nakp);
donatien	0:8e01dca41002	1410	PUTSHORT(PPP_PAP, nakp);
donatien	0:8e01dca41002	1411	break;
donatien	0:8e01dca41002	1412	}
donatien	0:8e01dca41002	1413	GETCHAR(cichar, p); /* get digest type*/
donatien	0:8e01dca41002	1414	if (cichar != CHAP_DIGEST_MD5
donatien	0:8e01dca41002	1415	#if MSCHAP_SUPPORT
donatien	0:8e01dca41002	1416	&& cichar != CHAP_MICROSOFT
donatien	0:8e01dca41002	1417	#endif
donatien	0:8e01dca41002	1418	) {
donatien	0:8e01dca41002	1419	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP digest=%d\n", (int)cichar));
donatien	0:8e01dca41002	1420	orc = CONFNAK;
donatien	0:8e01dca41002	1421	PUTCHAR(CI_AUTHTYPE, nakp);
donatien	0:8e01dca41002	1422	PUTCHAR(CILEN_CHAP, nakp);
donatien	0:8e01dca41002	1423	PUTSHORT(PPP_CHAP, nakp);
donatien	0:8e01dca41002	1424	PUTCHAR(ao->chap_mdtype, nakp);
donatien	0:8e01dca41002	1425	break;
donatien	0:8e01dca41002	1426	}
donatien	0:8e01dca41002	1427	#if TRACELCP > 0
donatien	0:8e01dca41002	1428	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CHAP %X,%d", cishort, (int)cichar);
donatien	0:8e01dca41002	1429	traceNdx = strlen(traceBuf);
donatien	0:8e01dca41002	1430	#endif
donatien	0:8e01dca41002	1431	ho->chap_mdtype = cichar; /* save md type */
donatien	0:8e01dca41002	1432	ho->neg_chap = 1;
donatien	0:8e01dca41002	1433	break;
donatien	0:8e01dca41002	1434	}
donatien	0:8e01dca41002	1435
donatien	0:8e01dca41002	1436	/*
donatien	0:8e01dca41002	1437	* We don't recognize the protocol they're asking for.
donatien	0:8e01dca41002	1438	* Nak it with something we're willing to do.
donatien	0:8e01dca41002	1439	* (At this point we know ao->neg_upap \|\| ao->neg_chap.)
donatien	0:8e01dca41002	1440	*/
donatien	0:8e01dca41002	1441	orc = CONFNAK;
donatien	0:8e01dca41002	1442	PUTCHAR(CI_AUTHTYPE, nakp);
donatien	0:8e01dca41002	1443	if (ao->neg_chap) {
donatien	0:8e01dca41002	1444	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req CHAP\n", cishort));
donatien	0:8e01dca41002	1445	PUTCHAR(CILEN_CHAP, nakp);
donatien	0:8e01dca41002	1446	PUTSHORT(PPP_CHAP, nakp);
donatien	0:8e01dca41002	1447	PUTCHAR(ao->chap_mdtype, nakp);
donatien	0:8e01dca41002	1448	} else {
donatien	0:8e01dca41002	1449	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req PAP\n", cishort));
donatien	0:8e01dca41002	1450	PUTCHAR(CILEN_SHORT, nakp);
donatien	0:8e01dca41002	1451	PUTSHORT(PPP_PAP, nakp);
donatien	0:8e01dca41002	1452	}
donatien	0:8e01dca41002	1453	break;
donatien	0:8e01dca41002	1454
donatien	0:8e01dca41002	1455	case CI_QUALITY:
donatien	0:8e01dca41002	1456	GETSHORT(cishort, p);
donatien	0:8e01dca41002	1457	GETLONG(cilong, p);
donatien	0:8e01dca41002	1458	#if TRACELCP > 0
donatien	0:8e01dca41002	1459	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " QUALITY (%x %x)", cishort, (unsigned int) cilong);
donatien	0:8e01dca41002	1460	traceNdx = strlen(traceBuf);
donatien	0:8e01dca41002	1461	#endif
donatien	0:8e01dca41002	1462
donatien	0:8e01dca41002	1463	if (!ao->neg_lqr \|\|
donatien	0:8e01dca41002	1464	cilen != CILEN_LQR) {
donatien	0:8e01dca41002	1465	orc = CONFREJ;
donatien	0:8e01dca41002	1466	break;
donatien	0:8e01dca41002	1467	}
donatien	0:8e01dca41002	1468
donatien	0:8e01dca41002	1469	/*
donatien	0:8e01dca41002	1470	* Check the protocol and the reporting period.
donatien	0:8e01dca41002	1471	* XXX When should we Nak this, and what with?
donatien	0:8e01dca41002	1472	*/
donatien	0:8e01dca41002	1473	if (cishort != PPP_LQR) {
donatien	0:8e01dca41002	1474	orc = CONFNAK;
donatien	0:8e01dca41002	1475	PUTCHAR(CI_QUALITY, nakp);
donatien	0:8e01dca41002	1476	PUTCHAR(CILEN_LQR, nakp);
donatien	0:8e01dca41002	1477	PUTSHORT(PPP_LQR, nakp);
donatien	0:8e01dca41002	1478	PUTLONG(ao->lqr_period, nakp);
donatien	0:8e01dca41002	1479	break;
donatien	0:8e01dca41002	1480	}
donatien	0:8e01dca41002	1481	break;
donatien	0:8e01dca41002	1482
donatien	0:8e01dca41002	1483	case CI_MAGICNUMBER:
donatien	0:8e01dca41002	1484	if (!(ao->neg_magicnumber \|\| go->neg_magicnumber) \|\|
donatien	0:8e01dca41002	1485	cilen != CILEN_LONG) {
donatien	0:8e01dca41002	1486	orc = CONFREJ;
donatien	0:8e01dca41002	1487	break;
donatien	0:8e01dca41002	1488	}
donatien	0:8e01dca41002	1489	GETLONG(cilong, p);
donatien	0:8e01dca41002	1490	#if TRACELCP > 0
donatien	0:8e01dca41002	1491	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MAGICNUMBER (%lX)", cilong);
donatien	0:8e01dca41002	1492	traceNdx = strlen(traceBuf);
donatien	0:8e01dca41002	1493	#endif
donatien	0:8e01dca41002	1494
donatien	0:8e01dca41002	1495	/*
donatien	0:8e01dca41002	1496	* He must have a different magic number.
donatien	0:8e01dca41002	1497	*/
donatien	0:8e01dca41002	1498	if (go->neg_magicnumber &&
donatien	0:8e01dca41002	1499	cilong == go->magicnumber) {
donatien	0:8e01dca41002	1500	cilong = magic(); /* Don't put magic() inside macro! */
donatien	0:8e01dca41002	1501	orc = CONFNAK;
donatien	0:8e01dca41002	1502	PUTCHAR(CI_MAGICNUMBER, nakp);
donatien	0:8e01dca41002	1503	PUTCHAR(CILEN_LONG, nakp);
donatien	0:8e01dca41002	1504	PUTLONG(cilong, nakp);
donatien	0:8e01dca41002	1505	break;
donatien	0:8e01dca41002	1506	}
donatien	0:8e01dca41002	1507	ho->neg_magicnumber = 1;
donatien	0:8e01dca41002	1508	ho->magicnumber = cilong;
donatien	0:8e01dca41002	1509	break;
donatien	0:8e01dca41002	1510
donatien	0:8e01dca41002	1511
donatien	0:8e01dca41002	1512	case CI_PCOMPRESSION:
donatien	0:8e01dca41002	1513	#if TRACELCP > 0
donatien	0:8e01dca41002	1514	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PCOMPRESSION");
donatien	0:8e01dca41002	1515	traceNdx = strlen(traceBuf);
donatien	0:8e01dca41002	1516	#endif
donatien	0:8e01dca41002	1517	if (!ao->neg_pcompression \|\|
donatien	0:8e01dca41002	1518	cilen != CILEN_VOID) {
donatien	0:8e01dca41002	1519	orc = CONFREJ;
donatien	0:8e01dca41002	1520	break;
donatien	0:8e01dca41002	1521	}
donatien	0:8e01dca41002	1522	ho->neg_pcompression = 1;
donatien	0:8e01dca41002	1523	break;
donatien	0:8e01dca41002	1524
donatien	0:8e01dca41002	1525	case CI_ACCOMPRESSION:
donatien	0:8e01dca41002	1526	#if TRACELCP > 0
donatien	0:8e01dca41002	1527	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ACCOMPRESSION");
donatien	0:8e01dca41002	1528	traceNdx = strlen(traceBuf);
donatien	0:8e01dca41002	1529	#endif
donatien	0:8e01dca41002	1530	if (!ao->neg_accompression \|\|
donatien	0:8e01dca41002	1531	cilen != CILEN_VOID) {
donatien	0:8e01dca41002	1532	orc = CONFREJ;
donatien	0:8e01dca41002	1533	break;
donatien	0:8e01dca41002	1534	}
donatien	0:8e01dca41002	1535	ho->neg_accompression = 1;
donatien	0:8e01dca41002	1536	break;
donatien	0:8e01dca41002	1537
donatien	0:8e01dca41002	1538	case CI_MRRU:
donatien	0:8e01dca41002	1539	#if TRACELCP > 0
donatien	0:8e01dca41002	1540	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_MRRU");
donatien	0:8e01dca41002	1541	traceNdx = strlen(traceBuf);
donatien	0:8e01dca41002	1542	#endif
donatien	0:8e01dca41002	1543	orc = CONFREJ;
donatien	0:8e01dca41002	1544	break;
donatien	0:8e01dca41002	1545
donatien	0:8e01dca41002	1546	case CI_SSNHF:
donatien	0:8e01dca41002	1547	#if TRACELCP > 0
donatien	0:8e01dca41002	1548	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_SSNHF");
donatien	0:8e01dca41002	1549	traceNdx = strlen(traceBuf);
donatien	0:8e01dca41002	1550	#endif
donatien	0:8e01dca41002	1551	orc = CONFREJ;
donatien	0:8e01dca41002	1552	break;
donatien	0:8e01dca41002	1553
donatien	0:8e01dca41002	1554	case CI_EPDISC:
donatien	0:8e01dca41002	1555	#if TRACELCP > 0
donatien	0:8e01dca41002	1556	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_EPDISC");
donatien	0:8e01dca41002	1557	traceNdx = strlen(traceBuf);
donatien	0:8e01dca41002	1558	#endif
donatien	0:8e01dca41002	1559	orc = CONFREJ;
donatien	0:8e01dca41002	1560	break;
donatien	0:8e01dca41002	1561
donatien	0:8e01dca41002	1562	default:
donatien	0:8e01dca41002	1563	#if TRACELCP
donatien	0:8e01dca41002	1564	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " unknown %d", citype);
donatien	0:8e01dca41002	1565	traceNdx = strlen(traceBuf);
donatien	0:8e01dca41002	1566	#endif
donatien	0:8e01dca41002	1567	orc = CONFREJ;
donatien	0:8e01dca41002	1568	break;
donatien	0:8e01dca41002	1569	}
donatien	0:8e01dca41002	1570
donatien	0:8e01dca41002	1571	endswitch:
donatien	0:8e01dca41002	1572	#if TRACELCP
donatien	0:8e01dca41002	1573	if (traceNdx >= 80 - 32) {
donatien	0:8e01dca41002	1574	LCPDEBUG(LOG_INFO, ("lcp_reqci: rcvd%s\n", traceBuf));
donatien	0:8e01dca41002	1575	traceNdx = 0;
donatien	0:8e01dca41002	1576	}
donatien	0:8e01dca41002	1577	#endif
donatien	0:8e01dca41002	1578	if (orc == CONFACK && /* Good CI */
donatien	0:8e01dca41002	1579	rc != CONFACK) { /* but prior CI wasnt? */
donatien	0:8e01dca41002	1580	continue; /* Don't send this one */
donatien	0:8e01dca41002	1581	}
donatien	0:8e01dca41002	1582
donatien	0:8e01dca41002	1583	if (orc == CONFNAK) { /* Nak this CI? */
donatien	0:8e01dca41002	1584	if (reject_if_disagree /* Getting fed up with sending NAKs? */
donatien	0:8e01dca41002	1585	&& citype != CI_MAGICNUMBER) {
donatien	0:8e01dca41002	1586	orc = CONFREJ; /* Get tough if so */
donatien	0:8e01dca41002	1587	} else {
donatien	0:8e01dca41002	1588	if (rc == CONFREJ) { /* Rejecting prior CI? */
donatien	0:8e01dca41002	1589	continue; /* Don't send this one */
donatien	0:8e01dca41002	1590	}
donatien	0:8e01dca41002	1591	rc = CONFNAK;
donatien	0:8e01dca41002	1592	}
donatien	0:8e01dca41002	1593	}
donatien	0:8e01dca41002	1594	if (orc == CONFREJ) { /* Reject this CI */
donatien	0:8e01dca41002	1595	rc = CONFREJ;
donatien	0:8e01dca41002	1596	if (cip != rejp) { /* Need to move rejected CI? */
donatien	0:8e01dca41002	1597	BCOPY(cip, rejp, cilen); /* Move it */
donatien	0:8e01dca41002	1598	}
donatien	0:8e01dca41002	1599	INCPTR(cilen, rejp); /* Update output pointer */
donatien	0:8e01dca41002	1600	}
donatien	0:8e01dca41002	1601	}
donatien	0:8e01dca41002	1602
donatien	0:8e01dca41002	1603	/*
donatien	0:8e01dca41002	1604	* If we wanted to send additional NAKs (for unsent CIs), the
donatien	0:8e01dca41002	1605	* code would go here. The extra NAKs would go at *nakp.
donatien	0:8e01dca41002	1606	* At present there are no cases where we want to ask the
donatien	0:8e01dca41002	1607	* peer to negotiate an option.
donatien	0:8e01dca41002	1608	*/
donatien	0:8e01dca41002	1609
donatien	0:8e01dca41002	1610	switch (rc) {
donatien	0:8e01dca41002	1611	case CONFACK:
donatien	0:8e01dca41002	1612	*lenp = (int)(next - inp);
donatien	0:8e01dca41002	1613	break;
donatien	0:8e01dca41002	1614	case CONFNAK:
donatien	0:8e01dca41002	1615	/*
donatien	0:8e01dca41002	1616	* Copy the Nak'd options from the nak_buffer to the caller's buffer.
donatien	0:8e01dca41002	1617	*/
donatien	0:8e01dca41002	1618	*lenp = (int)(nakp - nak_buffer);
donatien	0:8e01dca41002	1619	BCOPY(nak_buffer, inp, *lenp);
donatien	0:8e01dca41002	1620	break;
donatien	0:8e01dca41002	1621	case CONFREJ:
donatien	0:8e01dca41002	1622	*lenp = (int)(rejp - inp);
donatien	0:8e01dca41002	1623	break;
donatien	0:8e01dca41002	1624	}
donatien	0:8e01dca41002	1625
donatien	0:8e01dca41002	1626	#if TRACELCP > 0
donatien	0:8e01dca41002	1627	if (traceNdx > 0) {
donatien	0:8e01dca41002	1628	LCPDEBUG(LOG_INFO, ("lcp_reqci: %s\n", traceBuf));
donatien	0:8e01dca41002	1629	}
donatien	0:8e01dca41002	1630	#endif
donatien	0:8e01dca41002	1631	LCPDEBUG(LOG_INFO, ("lcp_reqci: returning CONF%s.\n", CODENAME(rc)));
donatien	0:8e01dca41002	1632	return (rc); /* Return final code */
donatien	0:8e01dca41002	1633	}
donatien	0:8e01dca41002	1634
donatien	0:8e01dca41002	1635
donatien	0:8e01dca41002	1636	/*
donatien	0:8e01dca41002	1637	* lcp_up - LCP has come UP.
donatien	0:8e01dca41002	1638	*/
donatien	0:8e01dca41002	1639	static void
donatien	0:8e01dca41002	1640	lcp_up(fsm *f)
donatien	0:8e01dca41002	1641	{
donatien	0:8e01dca41002	1642	lcp_options *wo = &lcp_wantoptions[f->unit];
donatien	0:8e01dca41002	1643	lcp_options *ho = &lcp_hisoptions[f->unit];
donatien	0:8e01dca41002	1644	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:8e01dca41002	1645	lcp_options *ao = &lcp_allowoptions[f->unit];
donatien	0:8e01dca41002	1646
donatien	0:8e01dca41002	1647	if (!go->neg_magicnumber) {
donatien	0:8e01dca41002	1648	go->magicnumber = 0;
donatien	0:8e01dca41002	1649	}
donatien	0:8e01dca41002	1650	if (!ho->neg_magicnumber) {
donatien	0:8e01dca41002	1651	ho->magicnumber = 0;
donatien	0:8e01dca41002	1652	}
donatien	0:8e01dca41002	1653
donatien	0:8e01dca41002	1654	/*
donatien	0:8e01dca41002	1655	* Set our MTU to the smaller of the MTU we wanted and
donatien	0:8e01dca41002	1656	* the MRU our peer wanted. If we negotiated an MRU,
donatien	0:8e01dca41002	1657	* set our MRU to the larger of value we wanted and
donatien	0:8e01dca41002	1658	* the value we got in the negotiation.
donatien	0:8e01dca41002	1659	*/
donatien	0:8e01dca41002	1660	ppp_send_config(f->unit, LWIP_MIN(ao->mru, (ho->neg_mru? ho->mru: PPP_MRU)),
donatien	0:8e01dca41002	1661	(ho->neg_asyncmap? ho->asyncmap: 0xffffffffl),
donatien	0:8e01dca41002	1662	ho->neg_pcompression, ho->neg_accompression);
donatien	0:8e01dca41002	1663	/*
donatien	0:8e01dca41002	1664	* If the asyncmap hasn't been negotiated, we really should
donatien	0:8e01dca41002	1665	* set the receive asyncmap to ffffffff, but we set it to 0
donatien	0:8e01dca41002	1666	* for backwards contemptibility.
donatien	0:8e01dca41002	1667	*/
donatien	0:8e01dca41002	1668	ppp_recv_config(f->unit, (go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU),
donatien	0:8e01dca41002	1669	(go->neg_asyncmap? go->asyncmap: 0x00000000),
donatien	0:8e01dca41002	1670	go->neg_pcompression, go->neg_accompression);
donatien	0:8e01dca41002	1671
donatien	0:8e01dca41002	1672	if (ho->neg_mru) {
donatien	0:8e01dca41002	1673	peer_mru[f->unit] = ho->mru;
donatien	0:8e01dca41002	1674	}
donatien	0:8e01dca41002	1675
donatien	0:8e01dca41002	1676	lcp_echo_lowerup(f->unit); /* Enable echo messages */
donatien	0:8e01dca41002	1677
donatien	0:8e01dca41002	1678	link_established(f->unit); /* The link is up; authenticate now */
donatien	0:8e01dca41002	1679	}
donatien	0:8e01dca41002	1680
donatien	0:8e01dca41002	1681
donatien	0:8e01dca41002	1682	/*
donatien	0:8e01dca41002	1683	* lcp_down - LCP has gone DOWN.
donatien	0:8e01dca41002	1684	*
donatien	0:8e01dca41002	1685	* Alert other protocols.
donatien	0:8e01dca41002	1686	*/
donatien	0:8e01dca41002	1687	static void
donatien	0:8e01dca41002	1688	lcp_down(fsm *f)
donatien	0:8e01dca41002	1689	{
donatien	0:8e01dca41002	1690	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:8e01dca41002	1691
donatien	0:8e01dca41002	1692	lcp_echo_lowerdown(f->unit);
donatien	0:8e01dca41002	1693
donatien	0:8e01dca41002	1694	link_down(f->unit);
donatien	0:8e01dca41002	1695
donatien	0:8e01dca41002	1696	ppp_send_config(f->unit, PPP_MRU, 0xffffffffl, 0, 0);
donatien	0:8e01dca41002	1697	ppp_recv_config(f->unit, PPP_MRU,
donatien	0:8e01dca41002	1698	(go->neg_asyncmap? go->asyncmap: 0x00000000),
donatien	0:8e01dca41002	1699	go->neg_pcompression, go->neg_accompression);
donatien	0:8e01dca41002	1700	peer_mru[f->unit] = PPP_MRU;
donatien	0:8e01dca41002	1701	}
donatien	0:8e01dca41002	1702
donatien	0:8e01dca41002	1703
donatien	0:8e01dca41002	1704	/*
donatien	0:8e01dca41002	1705	* lcp_starting - LCP needs the lower layer up.
donatien	0:8e01dca41002	1706	*/
donatien	0:8e01dca41002	1707	static void
donatien	0:8e01dca41002	1708	lcp_starting(fsm *f)
donatien	0:8e01dca41002	1709	{
donatien	0:8e01dca41002	1710	link_required(f->unit); /* lwip: currently does nothing */
donatien	0:8e01dca41002	1711	}
donatien	0:8e01dca41002	1712
donatien	0:8e01dca41002	1713
donatien	0:8e01dca41002	1714	/*
donatien	0:8e01dca41002	1715	* lcp_finished - LCP has finished with the lower layer.
donatien	0:8e01dca41002	1716	*/
donatien	0:8e01dca41002	1717	static void
donatien	0:8e01dca41002	1718	lcp_finished(fsm *f)
donatien	0:8e01dca41002	1719	{
donatien	0:8e01dca41002	1720	link_terminated(f->unit); /* we are finished with the link */
donatien	0:8e01dca41002	1721	}
donatien	0:8e01dca41002	1722
donatien	0:8e01dca41002	1723
donatien	0:8e01dca41002	1724	#if PPP_ADDITIONAL_CALLBACKS
donatien	0:8e01dca41002	1725	/*
donatien	0:8e01dca41002	1726	* print_string - print a readable representation of a string using
donatien	0:8e01dca41002	1727	* printer.
donatien	0:8e01dca41002	1728	*/
donatien	0:8e01dca41002	1729	static void
donatien	0:8e01dca41002	1730	print_string( char p, int len, void (printer) (void , char , ...), void *arg)
donatien	0:8e01dca41002	1731	{
donatien	0:8e01dca41002	1732	int c;
donatien	0:8e01dca41002	1733
donatien	0:8e01dca41002	1734	printer(arg, "\"");
donatien	0:8e01dca41002	1735	for (; len > 0; --len) {
donatien	0:8e01dca41002	1736	c = *p++;
donatien	0:8e01dca41002	1737	if (' ' <= c && c <= '~') {
donatien	0:8e01dca41002	1738	if (c == '\\' \|\| c == '"') {
donatien	0:8e01dca41002	1739	printer(arg, "\\");
donatien	0:8e01dca41002	1740	}
donatien	0:8e01dca41002	1741	printer(arg, "%c", c);
donatien	0:8e01dca41002	1742	} else {
donatien	0:8e01dca41002	1743	switch (c) {
donatien	0:8e01dca41002	1744	case '\n':
donatien	0:8e01dca41002	1745	printer(arg, "\\n");
donatien	0:8e01dca41002	1746	break;
donatien	0:8e01dca41002	1747	case '\r':
donatien	0:8e01dca41002	1748	printer(arg, "\\r");
donatien	0:8e01dca41002	1749	break;
donatien	0:8e01dca41002	1750	case '\t':
donatien	0:8e01dca41002	1751	printer(arg, "\\t");
donatien	0:8e01dca41002	1752	break;
donatien	0:8e01dca41002	1753	default:
donatien	0:8e01dca41002	1754	printer(arg, "\\%.3o", c);
donatien	0:8e01dca41002	1755	}
donatien	0:8e01dca41002	1756	}
donatien	0:8e01dca41002	1757	}
donatien	0:8e01dca41002	1758	printer(arg, "\"");
donatien	0:8e01dca41002	1759	}
donatien	0:8e01dca41002	1760
donatien	0:8e01dca41002	1761
donatien	0:8e01dca41002	1762	/*
donatien	0:8e01dca41002	1763	* lcp_printpkt - print the contents of an LCP packet.
donatien	0:8e01dca41002	1764	*/
donatien	0:8e01dca41002	1765	static char *lcp_codenames[] = {
donatien	0:8e01dca41002	1766	"ConfReq", "ConfAck", "ConfNak", "ConfRej",
donatien	0:8e01dca41002	1767	"TermReq", "TermAck", "CodeRej", "ProtRej",
donatien	0:8e01dca41002	1768	"EchoReq", "EchoRep", "DiscReq"
donatien	0:8e01dca41002	1769	};
donatien	0:8e01dca41002	1770
donatien	0:8e01dca41002	1771	static int
donatien	0:8e01dca41002	1772	lcp_printpkt( u_char p, int plen, void (printer) (void , char , ...), void *arg)
donatien	0:8e01dca41002	1773	{
donatien	0:8e01dca41002	1774	int code, id, len, olen;
donatien	0:8e01dca41002	1775	u_char pstart, optend;
donatien	0:8e01dca41002	1776	u_short cishort;
donatien	0:8e01dca41002	1777	u32_t cilong;
donatien	0:8e01dca41002	1778
donatien	0:8e01dca41002	1779	if (plen < HEADERLEN) {
donatien	0:8e01dca41002	1780	return 0;
donatien	0:8e01dca41002	1781	}
donatien	0:8e01dca41002	1782	pstart = p;
donatien	0:8e01dca41002	1783	GETCHAR(code, p);
donatien	0:8e01dca41002	1784	GETCHAR(id, p);
donatien	0:8e01dca41002	1785	GETSHORT(len, p);
donatien	0:8e01dca41002	1786	if (len < HEADERLEN \|\| len > plen) {
donatien	0:8e01dca41002	1787	return 0;
donatien	0:8e01dca41002	1788	}
donatien	0:8e01dca41002	1789
donatien	0:8e01dca41002	1790	if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *)) {
donatien	0:8e01dca41002	1791	printer(arg, " %s", lcp_codenames[code-1]);
donatien	0:8e01dca41002	1792	} else {
donatien	0:8e01dca41002	1793	printer(arg, " code=0x%x", code);
donatien	0:8e01dca41002	1794	}
donatien	0:8e01dca41002	1795	printer(arg, " id=0x%x", id);
donatien	0:8e01dca41002	1796	len -= HEADERLEN;
donatien	0:8e01dca41002	1797	switch (code) {
donatien	0:8e01dca41002	1798	case CONFREQ:
donatien	0:8e01dca41002	1799	case CONFACK:
donatien	0:8e01dca41002	1800	case CONFNAK:
donatien	0:8e01dca41002	1801	case CONFREJ:
donatien	0:8e01dca41002	1802	/* print option list */
donatien	0:8e01dca41002	1803	while (len >= 2) {
donatien	0:8e01dca41002	1804	GETCHAR(code, p);
donatien	0:8e01dca41002	1805	GETCHAR(olen, p);
donatien	0:8e01dca41002	1806	p -= 2;
donatien	0:8e01dca41002	1807	if (olen < 2 \|\| olen > len) {
donatien	0:8e01dca41002	1808	break;
donatien	0:8e01dca41002	1809	}
donatien	0:8e01dca41002	1810	printer(arg, " <");
donatien	0:8e01dca41002	1811	len -= olen;
donatien	0:8e01dca41002	1812	optend = p + olen;
donatien	0:8e01dca41002	1813	switch (code) {
donatien	0:8e01dca41002	1814	case CI_MRU:
donatien	0:8e01dca41002	1815	if (olen == CILEN_SHORT) {
donatien	0:8e01dca41002	1816	p += 2;
donatien	0:8e01dca41002	1817	GETSHORT(cishort, p);
donatien	0:8e01dca41002	1818	printer(arg, "mru %d", cishort);
donatien	0:8e01dca41002	1819	}
donatien	0:8e01dca41002	1820	break;
donatien	0:8e01dca41002	1821	case CI_ASYNCMAP:
donatien	0:8e01dca41002	1822	if (olen == CILEN_LONG) {
donatien	0:8e01dca41002	1823	p += 2;
donatien	0:8e01dca41002	1824	GETLONG(cilong, p);
donatien	0:8e01dca41002	1825	printer(arg, "asyncmap 0x%lx", cilong);
donatien	0:8e01dca41002	1826	}
donatien	0:8e01dca41002	1827	break;
donatien	0:8e01dca41002	1828	case CI_AUTHTYPE:
donatien	0:8e01dca41002	1829	if (olen >= CILEN_SHORT) {
donatien	0:8e01dca41002	1830	p += 2;
donatien	0:8e01dca41002	1831	printer(arg, "auth ");
donatien	0:8e01dca41002	1832	GETSHORT(cishort, p);
donatien	0:8e01dca41002	1833	switch (cishort) {
donatien	0:8e01dca41002	1834	case PPP_PAP:
donatien	0:8e01dca41002	1835	printer(arg, "pap");
donatien	0:8e01dca41002	1836	break;
donatien	0:8e01dca41002	1837	case PPP_CHAP:
donatien	0:8e01dca41002	1838	printer(arg, "chap");
donatien	0:8e01dca41002	1839	break;
donatien	0:8e01dca41002	1840	default:
donatien	0:8e01dca41002	1841	printer(arg, "0x%x", cishort);
donatien	0:8e01dca41002	1842	}
donatien	0:8e01dca41002	1843	}
donatien	0:8e01dca41002	1844	break;
donatien	0:8e01dca41002	1845	case CI_QUALITY:
donatien	0:8e01dca41002	1846	if (olen >= CILEN_SHORT) {
donatien	0:8e01dca41002	1847	p += 2;
donatien	0:8e01dca41002	1848	printer(arg, "quality ");
donatien	0:8e01dca41002	1849	GETSHORT(cishort, p);
donatien	0:8e01dca41002	1850	switch (cishort) {
donatien	0:8e01dca41002	1851	case PPP_LQR:
donatien	0:8e01dca41002	1852	printer(arg, "lqr");
donatien	0:8e01dca41002	1853	break;
donatien	0:8e01dca41002	1854	default:
donatien	0:8e01dca41002	1855	printer(arg, "0x%x", cishort);
donatien	0:8e01dca41002	1856	}
donatien	0:8e01dca41002	1857	}
donatien	0:8e01dca41002	1858	break;
donatien	0:8e01dca41002	1859	case CI_CALLBACK:
donatien	0:8e01dca41002	1860	if (olen >= CILEN_CHAR) {
donatien	0:8e01dca41002	1861	p += 2;
donatien	0:8e01dca41002	1862	printer(arg, "callback ");
donatien	0:8e01dca41002	1863	GETSHORT(cishort, p);
donatien	0:8e01dca41002	1864	switch (cishort) {
donatien	0:8e01dca41002	1865	case CBCP_OPT:
donatien	0:8e01dca41002	1866	printer(arg, "CBCP");
donatien	0:8e01dca41002	1867	break;
donatien	0:8e01dca41002	1868	default:
donatien	0:8e01dca41002	1869	printer(arg, "0x%x", cishort);
donatien	0:8e01dca41002	1870	}
donatien	0:8e01dca41002	1871	}
donatien	0:8e01dca41002	1872	break;
donatien	0:8e01dca41002	1873	case CI_MAGICNUMBER:
donatien	0:8e01dca41002	1874	if (olen == CILEN_LONG) {
donatien	0:8e01dca41002	1875	p += 2;
donatien	0:8e01dca41002	1876	GETLONG(cilong, p);
donatien	0:8e01dca41002	1877	printer(arg, "magic 0x%x", cilong);
donatien	0:8e01dca41002	1878	}
donatien	0:8e01dca41002	1879	break;
donatien	0:8e01dca41002	1880	case CI_PCOMPRESSION:
donatien	0:8e01dca41002	1881	if (olen == CILEN_VOID) {
donatien	0:8e01dca41002	1882	p += 2;
donatien	0:8e01dca41002	1883	printer(arg, "pcomp");
donatien	0:8e01dca41002	1884	}
donatien	0:8e01dca41002	1885	break;
donatien	0:8e01dca41002	1886	case CI_ACCOMPRESSION:
donatien	0:8e01dca41002	1887	if (olen == CILEN_VOID) {
donatien	0:8e01dca41002	1888	p += 2;
donatien	0:8e01dca41002	1889	printer(arg, "accomp");
donatien	0:8e01dca41002	1890	}
donatien	0:8e01dca41002	1891	break;
donatien	0:8e01dca41002	1892	}
donatien	0:8e01dca41002	1893	while (p < optend) {
donatien	0:8e01dca41002	1894	GETCHAR(code, p);
donatien	0:8e01dca41002	1895	printer(arg, " %.2x", code);
donatien	0:8e01dca41002	1896	}
donatien	0:8e01dca41002	1897	printer(arg, ">");
donatien	0:8e01dca41002	1898	}
donatien	0:8e01dca41002	1899	break;
donatien	0:8e01dca41002	1900
donatien	0:8e01dca41002	1901	case TERMACK:
donatien	0:8e01dca41002	1902	case TERMREQ:
donatien	0:8e01dca41002	1903	if (len > 0 && p >= ' ' && p < 0x7f) {
donatien	0:8e01dca41002	1904	printer(arg, " ");
donatien	0:8e01dca41002	1905	print_string((char*)p, len, printer, arg);
donatien	0:8e01dca41002	1906	p += len;
donatien	0:8e01dca41002	1907	len = 0;
donatien	0:8e01dca41002	1908	}
donatien	0:8e01dca41002	1909	break;
donatien	0:8e01dca41002	1910
donatien	0:8e01dca41002	1911	case ECHOREQ:
donatien	0:8e01dca41002	1912	case ECHOREP:
donatien	0:8e01dca41002	1913	case DISCREQ:
donatien	0:8e01dca41002	1914	if (len >= 4) {
donatien	0:8e01dca41002	1915	GETLONG(cilong, p);
donatien	0:8e01dca41002	1916	printer(arg, " magic=0x%x", cilong);
donatien	0:8e01dca41002	1917	p += 4;
donatien	0:8e01dca41002	1918	len -= 4;
donatien	0:8e01dca41002	1919	}
donatien	0:8e01dca41002	1920	break;
donatien	0:8e01dca41002	1921	}
donatien	0:8e01dca41002	1922
donatien	0:8e01dca41002	1923	/* print the rest of the bytes in the packet */
donatien	0:8e01dca41002	1924	for (; len > 0; --len) {
donatien	0:8e01dca41002	1925	GETCHAR(code, p);
donatien	0:8e01dca41002	1926	printer(arg, " %.2x", code);
donatien	0:8e01dca41002	1927	}
donatien	0:8e01dca41002	1928
donatien	0:8e01dca41002	1929	return (int)(p - pstart);
donatien	0:8e01dca41002	1930	}
donatien	0:8e01dca41002	1931	#endif /* PPP_ADDITIONAL_CALLBACKS */
donatien	0:8e01dca41002	1932
donatien	0:8e01dca41002	1933	/*
donatien	0:8e01dca41002	1934	* Time to shut down the link because there is nothing out there.
donatien	0:8e01dca41002	1935	*/
donatien	0:8e01dca41002	1936	static void
donatien	0:8e01dca41002	1937	LcpLinkFailure (fsm *f)
donatien	0:8e01dca41002	1938	{
donatien	0:8e01dca41002	1939	if (f->state == LS_OPENED) {
donatien	0:8e01dca41002	1940	LCPDEBUG(LOG_INFO, ("No response to %d echo-requests\n", lcp_echos_pending));
donatien	0:8e01dca41002	1941	LCPDEBUG(LOG_NOTICE, ("Serial link appears to be disconnected.\n"));
donatien	0:8e01dca41002	1942	lcp_close(f->unit, "Peer not responding");
donatien	0:8e01dca41002	1943	}
donatien	0:8e01dca41002	1944	}
donatien	0:8e01dca41002	1945
donatien	0:8e01dca41002	1946	/*
donatien	0:8e01dca41002	1947	* Timer expired for the LCP echo requests from this process.
donatien	0:8e01dca41002	1948	*/
donatien	0:8e01dca41002	1949	static void
donatien	0:8e01dca41002	1950	LcpEchoCheck (fsm *f)
donatien	0:8e01dca41002	1951	{
donatien	0:8e01dca41002	1952	LcpSendEchoRequest (f);
donatien	0:8e01dca41002	1953
donatien	0:8e01dca41002	1954	/*
donatien	0:8e01dca41002	1955	* Start the timer for the next interval.
donatien	0:8e01dca41002	1956	*/
donatien	0:8e01dca41002	1957	LWIP_ASSERT("lcp_echo_timer_running == 0", lcp_echo_timer_running == 0);
donatien	0:8e01dca41002	1958
donatien	0:8e01dca41002	1959	TIMEOUT (LcpEchoTimeout, f, lcp_echo_interval);
donatien	0:8e01dca41002	1960	lcp_echo_timer_running = 1;
donatien	0:8e01dca41002	1961	}
donatien	0:8e01dca41002	1962
donatien	0:8e01dca41002	1963	/*
donatien	0:8e01dca41002	1964	* LcpEchoTimeout - Timer expired on the LCP echo
donatien	0:8e01dca41002	1965	*/
donatien	0:8e01dca41002	1966	static void
donatien	0:8e01dca41002	1967	LcpEchoTimeout (void *arg)
donatien	0:8e01dca41002	1968	{
donatien	0:8e01dca41002	1969	if (lcp_echo_timer_running != 0) {
donatien	0:8e01dca41002	1970	lcp_echo_timer_running = 0;
donatien	0:8e01dca41002	1971	LcpEchoCheck ((fsm *) arg);
donatien	0:8e01dca41002	1972	}
donatien	0:8e01dca41002	1973	}
donatien	0:8e01dca41002	1974
donatien	0:8e01dca41002	1975	/*
donatien	0:8e01dca41002	1976	* LcpEchoReply - LCP has received a reply to the echo
donatien	0:8e01dca41002	1977	*/
donatien	0:8e01dca41002	1978	static void
donatien	0:8e01dca41002	1979	lcp_received_echo_reply (fsm f, int id, u_char inp, int len)
donatien	0:8e01dca41002	1980	{
donatien	0:8e01dca41002	1981	u32_t magic;
donatien	0:8e01dca41002	1982
donatien	0:8e01dca41002	1983	LWIP_UNUSED_ARG(id);
donatien	0:8e01dca41002	1984
donatien	0:8e01dca41002	1985	/* Check the magic number - don't count replies from ourselves. */
donatien	0:8e01dca41002	1986	if (len < 4) {
donatien	0:8e01dca41002	1987	LCPDEBUG(LOG_WARNING, ("lcp: received short Echo-Reply, length %d\n", len));
donatien	0:8e01dca41002	1988	return;
donatien	0:8e01dca41002	1989	}
donatien	0:8e01dca41002	1990	GETLONG(magic, inp);
donatien	0:8e01dca41002	1991	if (lcp_gotoptions[f->unit].neg_magicnumber && magic == lcp_gotoptions[f->unit].magicnumber) {
donatien	0:8e01dca41002	1992	LCPDEBUG(LOG_WARNING, ("appear to have received our own echo-reply!\n"));
donatien	0:8e01dca41002	1993	return;
donatien	0:8e01dca41002	1994	}
donatien	0:8e01dca41002	1995
donatien	0:8e01dca41002	1996	/* Reset the number of outstanding echo frames */
donatien	0:8e01dca41002	1997	lcp_echos_pending = 0;
donatien	0:8e01dca41002	1998	}
donatien	0:8e01dca41002	1999
donatien	0:8e01dca41002	2000	/*
donatien	0:8e01dca41002	2001	* LcpSendEchoRequest - Send an echo request frame to the peer
donatien	0:8e01dca41002	2002	*/
donatien	0:8e01dca41002	2003	static void
donatien	0:8e01dca41002	2004	LcpSendEchoRequest (fsm *f)
donatien	0:8e01dca41002	2005	{
donatien	0:8e01dca41002	2006	u32_t lcp_magic;
donatien	0:8e01dca41002	2007	u_char pkt[4], *pktp;
donatien	0:8e01dca41002	2008
donatien	0:8e01dca41002	2009	/*
donatien	0:8e01dca41002	2010	* Detect the failure of the peer at this point.
donatien	0:8e01dca41002	2011	*/
donatien	0:8e01dca41002	2012	if (lcp_echo_fails != 0) {
donatien	0:8e01dca41002	2013	if (lcp_echos_pending >= lcp_echo_fails) {
donatien	0:8e01dca41002	2014	LcpLinkFailure(f);
donatien	0:8e01dca41002	2015	lcp_echos_pending = 0;
donatien	0:8e01dca41002	2016	}
donatien	0:8e01dca41002	2017	}
donatien	0:8e01dca41002	2018
donatien	0:8e01dca41002	2019	/*
donatien	0:8e01dca41002	2020	* Make and send the echo request frame.
donatien	0:8e01dca41002	2021	*/
donatien	0:8e01dca41002	2022	if (f->state == LS_OPENED) {
donatien	0:8e01dca41002	2023	lcp_magic = lcp_gotoptions[f->unit].magicnumber;
donatien	0:8e01dca41002	2024	pktp = pkt;
donatien	0:8e01dca41002	2025	PUTLONG(lcp_magic, pktp);
donatien	0:8e01dca41002	2026	fsm_sdata(f, ECHOREQ, (u_char)(lcp_echo_number++ & 0xFF), pkt, (int)(pktp - pkt));
donatien	0:8e01dca41002	2027	++lcp_echos_pending;
donatien	0:8e01dca41002	2028	}
donatien	0:8e01dca41002	2029	}
donatien	0:8e01dca41002	2030
donatien	0:8e01dca41002	2031	/*
donatien	0:8e01dca41002	2032	* lcp_echo_lowerup - Start the timer for the LCP frame
donatien	0:8e01dca41002	2033	*/
donatien	0:8e01dca41002	2034
donatien	0:8e01dca41002	2035	static void
donatien	0:8e01dca41002	2036	lcp_echo_lowerup (int unit)
donatien	0:8e01dca41002	2037	{
donatien	0:8e01dca41002	2038	fsm *f = &lcp_fsm[unit];
donatien	0:8e01dca41002	2039
donatien	0:8e01dca41002	2040	/* Clear the parameters for generating echo frames */
donatien	0:8e01dca41002	2041	lcp_echos_pending = 0;
donatien	0:8e01dca41002	2042	lcp_echo_number = 0;
donatien	0:8e01dca41002	2043	lcp_echo_timer_running = 0;
donatien	0:8e01dca41002	2044
donatien	0:8e01dca41002	2045	/* If a timeout interval is specified then start the timer */
donatien	0:8e01dca41002	2046	if (lcp_echo_interval != 0) {
donatien	0:8e01dca41002	2047	LcpEchoCheck (f);
donatien	0:8e01dca41002	2048	}
donatien	0:8e01dca41002	2049	}
donatien	0:8e01dca41002	2050
donatien	0:8e01dca41002	2051	/*
donatien	0:8e01dca41002	2052	* lcp_echo_lowerdown - Stop the timer for the LCP frame
donatien	0:8e01dca41002	2053	*/
donatien	0:8e01dca41002	2054
donatien	0:8e01dca41002	2055	static void
donatien	0:8e01dca41002	2056	lcp_echo_lowerdown (int unit)
donatien	0:8e01dca41002	2057	{
donatien	0:8e01dca41002	2058	fsm *f = &lcp_fsm[unit];
donatien	0:8e01dca41002	2059
donatien	0:8e01dca41002	2060	if (lcp_echo_timer_running != 0) {
donatien	0:8e01dca41002	2061	UNTIMEOUT (LcpEchoTimeout, f);
donatien	0:8e01dca41002	2062	lcp_echo_timer_running = 0;
donatien	0:8e01dca41002	2063	}
donatien	0:8e01dca41002	2064	}
donatien	0:8e01dca41002	2065
donatien	0:8e01dca41002	2066	#endif /* PPP_SUPPORT */