ZG2100NetIfSource

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lwip/netif/ppp/lcp.c@4:e00281c7453d, 2010-08-06 (annotated)

Committer:: donatien
Date:: Fri Aug 06 10:46:03 2010 +0000
Revision:: 4:e00281c7453d
Parent:: 0:b802fc31f1db

Who changed what in which revision?

User	Revision	Line number	New contents of line
donatien	0:b802fc31f1db	1	/*****************************************************************************
donatien	0:b802fc31f1db	2	* lcp.c - Network Link Control Protocol program file.
donatien	0:b802fc31f1db	3	*
donatien	0:b802fc31f1db	4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
donatien	0:b802fc31f1db	5	* portions Copyright (c) 1997 by Global Election Systems Inc.
donatien	0:b802fc31f1db	6	*
donatien	0:b802fc31f1db	7	* The authors hereby grant permission to use, copy, modify, distribute,
donatien	0:b802fc31f1db	8	* and license this software and its documentation for any purpose, provided
donatien	0:b802fc31f1db	9	* that existing copyright notices are retained in all copies and that this
donatien	0:b802fc31f1db	10	* notice and the following disclaimer are included verbatim in any
donatien	0:b802fc31f1db	11	* distributions. No written agreement, license, or royalty fee is required
donatien	0:b802fc31f1db	12	* for any of the authorized uses.
donatien	0:b802fc31f1db	13	*
donatien	0:b802fc31f1db	14	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
donatien	0:b802fc31f1db	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
donatien	0:b802fc31f1db	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
donatien	0:b802fc31f1db	17	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
donatien	0:b802fc31f1db	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
donatien	0:b802fc31f1db	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
donatien	0:b802fc31f1db	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
donatien	0:b802fc31f1db	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
donatien	0:b802fc31f1db	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
donatien	0:b802fc31f1db	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
donatien	0:b802fc31f1db	24	*
donatien	0:b802fc31f1db	25	******************************************************************************
donatien	0:b802fc31f1db	26	* REVISION HISTORY
donatien	0:b802fc31f1db	27	*
donatien	0:b802fc31f1db	28	* 03-01-01 Marc Boucher <marc@mbsi.ca>
donatien	0:b802fc31f1db	29	* Ported to lwIP.
donatien	0:b802fc31f1db	30	* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
donatien	0:b802fc31f1db	31	* Original.
donatien	0:b802fc31f1db	32	*****************************************************************************/
donatien	0:b802fc31f1db	33
donatien	0:b802fc31f1db	34	/*
donatien	0:b802fc31f1db	35	* lcp.c - PPP Link Control Protocol.
donatien	0:b802fc31f1db	36	*
donatien	0:b802fc31f1db	37	* Copyright (c) 1989 Carnegie Mellon University.
donatien	0:b802fc31f1db	38	* All rights reserved.
donatien	0:b802fc31f1db	39	*
donatien	0:b802fc31f1db	40	* Redistribution and use in source and binary forms are permitted
donatien	0:b802fc31f1db	41	* provided that the above copyright notice and this paragraph are
donatien	0:b802fc31f1db	42	* duplicated in all such forms and that any documentation,
donatien	0:b802fc31f1db	43	* advertising materials, and other materials related to such
donatien	0:b802fc31f1db	44	* distribution and use acknowledge that the software was developed
donatien	0:b802fc31f1db	45	* by Carnegie Mellon University. The name of the
donatien	0:b802fc31f1db	46	* University may not be used to endorse or promote products derived
donatien	0:b802fc31f1db	47	* from this software without specific prior written permission.
donatien	0:b802fc31f1db	48	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
donatien	0:b802fc31f1db	49	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
donatien	0:b802fc31f1db	50	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
donatien	0:b802fc31f1db	51	*/
donatien	0:b802fc31f1db	52
donatien	0:b802fc31f1db	53
donatien	0:b802fc31f1db	54	#include "lwip/opt.h"
donatien	0:b802fc31f1db	55
donatien	0:b802fc31f1db	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
donatien	0:b802fc31f1db	57
donatien	0:b802fc31f1db	58	#include "ppp.h"
donatien	0:b802fc31f1db	59	#include "pppdebug.h"
donatien	0:b802fc31f1db	60
donatien	0:b802fc31f1db	61	#include "fsm.h"
donatien	0:b802fc31f1db	62	#include "chap.h"
donatien	0:b802fc31f1db	63	#include "magic.h"
donatien	0:b802fc31f1db	64	#include "auth.h"
donatien	0:b802fc31f1db	65	#include "lcp.h"
donatien	0:b802fc31f1db	66
donatien	0:b802fc31f1db	67	#include <string.h>
donatien	0:b802fc31f1db	68
donatien	0:b802fc31f1db	69	#if PPPOE_SUPPORT
donatien	0:b802fc31f1db	70	#include "netif/ppp_oe.h"
donatien	0:b802fc31f1db	71	#else
donatien	0:b802fc31f1db	72	#define PPPOE_MAXMTU PPP_MAXMRU
donatien	0:b802fc31f1db	73	#endif
donatien	0:b802fc31f1db	74
donatien	0:b802fc31f1db	75	#if 0 /* UNUSED */
donatien	0:b802fc31f1db	76	/*
donatien	0:b802fc31f1db	77	* LCP-related command-line options.
donatien	0:b802fc31f1db	78	*/
donatien	0:b802fc31f1db	79	int lcp_echo_interval = 0; /* Interval between LCP echo-requests */
donatien	0:b802fc31f1db	80	int lcp_echo_fails = 0; /* Tolerance to unanswered echo-requests */
donatien	0:b802fc31f1db	81	bool lax_recv = 0; /* accept control chars in asyncmap */
donatien	0:b802fc31f1db	82
donatien	0:b802fc31f1db	83	static int setescape (char **);
donatien	0:b802fc31f1db	84
donatien	0:b802fc31f1db	85	static option_t lcp_option_list[] = {
donatien	0:b802fc31f1db	86	/* LCP options */
donatien	0:b802fc31f1db	87	/* list stripped for simplicity */
donatien	0:b802fc31f1db	88	{NULL}
donatien	0:b802fc31f1db	89	};
donatien	0:b802fc31f1db	90	#endif /* UNUSED */
donatien	0:b802fc31f1db	91
donatien	0:b802fc31f1db	92	/* options */
donatien	0:b802fc31f1db	93	LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */
donatien	0:b802fc31f1db	94	static u_int lcp_echo_interval = LCP_ECHOINTERVAL; /* Interval between LCP echo-requests */
donatien	0:b802fc31f1db	95	static u_int lcp_echo_fails = LCP_MAXECHOFAILS; /* Tolerance to unanswered echo-requests */
donatien	0:b802fc31f1db	96
donatien	0:b802fc31f1db	97	/* global vars */
donatien	0:b802fc31f1db	98	static fsm lcp_fsm[NUM_PPP]; /* LCP fsm structure (global)*/
donatien	0:b802fc31f1db	99	lcp_options lcp_wantoptions[NUM_PPP]; /* Options that we want to request */
donatien	0:b802fc31f1db	100	lcp_options lcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
donatien	0:b802fc31f1db	101	lcp_options lcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
donatien	0:b802fc31f1db	102	lcp_options lcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
donatien	0:b802fc31f1db	103	ext_accm xmit_accm[NUM_PPP]; /* extended transmit ACCM */
donatien	0:b802fc31f1db	104
donatien	0:b802fc31f1db	105	static u32_t lcp_echos_pending = 0; /* Number of outstanding echo msgs */
donatien	0:b802fc31f1db	106	static u32_t lcp_echo_number = 0; /* ID number of next echo frame */
donatien	0:b802fc31f1db	107	static u32_t lcp_echo_timer_running = 0; /* TRUE if a timer is running */
donatien	0:b802fc31f1db	108
donatien	0:b802fc31f1db	109	/* @todo: do we really need such a large buffer? The typical 1500 bytes seem too much. */
donatien	0:b802fc31f1db	110	static u_char nak_buffer[PPP_MRU]; /* where we construct a nak packet */
donatien	0:b802fc31f1db	111
donatien	0:b802fc31f1db	112	/*
donatien	0:b802fc31f1db	113	* Callbacks for fsm code. (CI = Configuration Information)
donatien	0:b802fc31f1db	114	*/
donatien	0:b802fc31f1db	115	static void lcp_resetci (fsm); / Reset our CI */
donatien	0:b802fc31f1db	116	static int lcp_cilen (fsm); / Return length of our CI */
donatien	0:b802fc31f1db	117	static void lcp_addci (fsm, u_char, int); / Add our CI to pkt */
donatien	0:b802fc31f1db	118	static int lcp_ackci (fsm, u_char, int); /* Peer ack'd our CI */
donatien	0:b802fc31f1db	119	static int lcp_nakci (fsm, u_char, int); /* Peer nak'd our CI */
donatien	0:b802fc31f1db	120	static int lcp_rejci (fsm, u_char, int); /* Peer rej'd our CI */
donatien	0:b802fc31f1db	121	static int lcp_reqci (fsm, u_char, int, int); / Rcv peer CI */
donatien	0:b802fc31f1db	122	static void lcp_up (fsm); / We're UP */
donatien	0:b802fc31f1db	123	static void lcp_down (fsm); / We're DOWN */
donatien	0:b802fc31f1db	124	static void lcp_starting (fsm); / We need lower layer up */
donatien	0:b802fc31f1db	125	static void lcp_finished (fsm); / We need lower layer down */
donatien	0:b802fc31f1db	126	static int lcp_extcode (fsm, int, u_char, u_char, int);
donatien	0:b802fc31f1db	127	static void lcp_rprotrej (fsm, u_char, int);
donatien	0:b802fc31f1db	128
donatien	0:b802fc31f1db	129	/*
donatien	0:b802fc31f1db	130	* routines to send LCP echos to peer
donatien	0:b802fc31f1db	131	*/
donatien	0:b802fc31f1db	132
donatien	0:b802fc31f1db	133	static void lcp_echo_lowerup (int);
donatien	0:b802fc31f1db	134	static void lcp_echo_lowerdown (int);
donatien	0:b802fc31f1db	135	static void LcpEchoTimeout (void*);
donatien	0:b802fc31f1db	136	static void lcp_received_echo_reply (fsm, int, u_char, int);
donatien	0:b802fc31f1db	137	static void LcpSendEchoRequest (fsm*);
donatien	0:b802fc31f1db	138	static void LcpLinkFailure (fsm*);
donatien	0:b802fc31f1db	139	static void LcpEchoCheck (fsm*);
donatien	0:b802fc31f1db	140
donatien	0:b802fc31f1db	141	static fsm_callbacks lcp_callbacks = { /* LCP callback routines */
donatien	0:b802fc31f1db	142	lcp_resetci, /* Reset our Configuration Information */
donatien	0:b802fc31f1db	143	lcp_cilen, /* Length of our Configuration Information */
donatien	0:b802fc31f1db	144	lcp_addci, /* Add our Configuration Information */
donatien	0:b802fc31f1db	145	lcp_ackci, /* ACK our Configuration Information */
donatien	0:b802fc31f1db	146	lcp_nakci, /* NAK our Configuration Information */
donatien	0:b802fc31f1db	147	lcp_rejci, /* Reject our Configuration Information */
donatien	0:b802fc31f1db	148	lcp_reqci, /* Request peer's Configuration Information */
donatien	0:b802fc31f1db	149	lcp_up, /* Called when fsm reaches LS_OPENED state */
donatien	0:b802fc31f1db	150	lcp_down, /* Called when fsm leaves LS_OPENED state */
donatien	0:b802fc31f1db	151	lcp_starting, /* Called when we want the lower layer up */
donatien	0:b802fc31f1db	152	lcp_finished, /* Called when we want the lower layer down */
donatien	0:b802fc31f1db	153	NULL, /* Called when Protocol-Reject received */
donatien	0:b802fc31f1db	154	NULL, /* Retransmission is necessary */
donatien	0:b802fc31f1db	155	lcp_extcode, /* Called to handle LCP-specific codes */
donatien	0:b802fc31f1db	156	"LCP" /* String name of protocol */
donatien	0:b802fc31f1db	157	};
donatien	0:b802fc31f1db	158
donatien	0:b802fc31f1db	159	/*
donatien	0:b802fc31f1db	160	* Protocol entry points.
donatien	0:b802fc31f1db	161	* Some of these are called directly.
donatien	0:b802fc31f1db	162	*/
donatien	0:b802fc31f1db	163
donatien	0:b802fc31f1db	164	static void lcp_input (int, u_char *, int);
donatien	0:b802fc31f1db	165	static void lcp_protrej (int);
donatien	0:b802fc31f1db	166
donatien	0:b802fc31f1db	167	struct protent lcp_protent = {
donatien	0:b802fc31f1db	168	PPP_LCP,
donatien	0:b802fc31f1db	169	lcp_init,
donatien	0:b802fc31f1db	170	lcp_input,
donatien	0:b802fc31f1db	171	lcp_protrej,
donatien	0:b802fc31f1db	172	lcp_lowerup,
donatien	0:b802fc31f1db	173	lcp_lowerdown,
donatien	0:b802fc31f1db	174	lcp_open,
donatien	0:b802fc31f1db	175	lcp_close,
donatien	0:b802fc31f1db	176	#if PPP_ADDITIONAL_CALLBACKS
donatien	0:b802fc31f1db	177	lcp_printpkt,
donatien	0:b802fc31f1db	178	NULL,
donatien	0:b802fc31f1db	179	#endif /* PPP_ADDITIONAL_CALLBACKS */
donatien	0:b802fc31f1db	180	1,
donatien	0:b802fc31f1db	181	"LCP",
donatien	0:b802fc31f1db	182	#if PPP_ADDITIONAL_CALLBACKS
donatien	0:b802fc31f1db	183	NULL,
donatien	0:b802fc31f1db	184	NULL,
donatien	0:b802fc31f1db	185	NULL
donatien	0:b802fc31f1db	186	#endif /* PPP_ADDITIONAL_CALLBACKS */
donatien	0:b802fc31f1db	187	};
donatien	0:b802fc31f1db	188
donatien	0:b802fc31f1db	189	int lcp_loopbackfail = DEFLOOPBACKFAIL;
donatien	0:b802fc31f1db	190
donatien	0:b802fc31f1db	191	/*
donatien	0:b802fc31f1db	192	* Length of each type of configuration option (in octets)
donatien	0:b802fc31f1db	193	*/
donatien	0:b802fc31f1db	194	#define CILEN_VOID 2
donatien	0:b802fc31f1db	195	#define CILEN_CHAR 3
donatien	0:b802fc31f1db	196	#define CILEN_SHORT 4 /* CILEN_VOID + sizeof(short) */
donatien	0:b802fc31f1db	197	#define CILEN_CHAP 5 /* CILEN_VOID + sizeof(short) + 1 */
donatien	0:b802fc31f1db	198	#define CILEN_LONG 6 /* CILEN_VOID + sizeof(long) */
donatien	0:b802fc31f1db	199	#define CILEN_LQR 8 /* CILEN_VOID + sizeof(short) + sizeof(long) */
donatien	0:b802fc31f1db	200	#define CILEN_CBCP 3
donatien	0:b802fc31f1db	201
donatien	0:b802fc31f1db	202	#define CODENAME(x) ((x) == CONFACK ? "ACK" : (x) == CONFNAK ? "NAK" : "REJ")
donatien	0:b802fc31f1db	203
donatien	0:b802fc31f1db	204	#if 0 /* UNUSED */
donatien	0:b802fc31f1db	205	/*
donatien	0:b802fc31f1db	206	* setescape - add chars to the set we escape on transmission.
donatien	0:b802fc31f1db	207	*/
donatien	0:b802fc31f1db	208	static int
donatien	0:b802fc31f1db	209	setescape(argv)
donatien	0:b802fc31f1db	210	char **argv;
donatien	0:b802fc31f1db	211	{
donatien	0:b802fc31f1db	212	int n, ret;
donatien	0:b802fc31f1db	213	char p, endp;
donatien	0:b802fc31f1db	214
donatien	0:b802fc31f1db	215	p = *argv;
donatien	0:b802fc31f1db	216	ret = 1;
donatien	0:b802fc31f1db	217	while (*p) {
donatien	0:b802fc31f1db	218	n = strtol(p, &endp, 16);
donatien	0:b802fc31f1db	219	if (p == endp) {
donatien	0:b802fc31f1db	220	option_error("escape parameter contains invalid hex number '%s'", p);
donatien	0:b802fc31f1db	221	return 0;
donatien	0:b802fc31f1db	222	}
donatien	0:b802fc31f1db	223	p = endp;
donatien	0:b802fc31f1db	224	if (n < 0 \|\| n == 0x5E \|\| n > 0xFF) {
donatien	0:b802fc31f1db	225	option_error("can't escape character 0x%x", n);
donatien	0:b802fc31f1db	226	ret = 0;
donatien	0:b802fc31f1db	227	} else
donatien	0:b802fc31f1db	228	xmit_accm[0][n >> 5] \|= 1 << (n & 0x1F);
donatien	0:b802fc31f1db	229	while (p == ',' \|\| p == ' ')
donatien	0:b802fc31f1db	230	++p;
donatien	0:b802fc31f1db	231	}
donatien	0:b802fc31f1db	232	return ret;
donatien	0:b802fc31f1db	233	}
donatien	0:b802fc31f1db	234	#endif /* UNUSED */
donatien	0:b802fc31f1db	235
donatien	0:b802fc31f1db	236	/*
donatien	0:b802fc31f1db	237	* lcp_init - Initialize LCP.
donatien	0:b802fc31f1db	238	*/
donatien	0:b802fc31f1db	239	void
donatien	0:b802fc31f1db	240	lcp_init(int unit)
donatien	0:b802fc31f1db	241	{
donatien	0:b802fc31f1db	242	fsm *f = &lcp_fsm[unit];
donatien	0:b802fc31f1db	243	lcp_options *wo = &lcp_wantoptions[unit];
donatien	0:b802fc31f1db	244	lcp_options *ao = &lcp_allowoptions[unit];
donatien	0:b802fc31f1db	245
donatien	0:b802fc31f1db	246	f->unit = unit;
donatien	0:b802fc31f1db	247	f->protocol = PPP_LCP;
donatien	0:b802fc31f1db	248	f->callbacks = &lcp_callbacks;
donatien	0:b802fc31f1db	249
donatien	0:b802fc31f1db	250	fsm_init(f);
donatien	0:b802fc31f1db	251
donatien	0:b802fc31f1db	252	wo->passive = 0;
donatien	0:b802fc31f1db	253	wo->silent = 0;
donatien	0:b802fc31f1db	254	wo->restart = 0; /* Set to 1 in kernels or multi-line implementations */
donatien	0:b802fc31f1db	255	wo->neg_mru = 1;
donatien	0:b802fc31f1db	256	wo->mru = PPP_DEFMRU;
donatien	0:b802fc31f1db	257	wo->neg_asyncmap = 1;
donatien	0:b802fc31f1db	258	wo->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
donatien	0:b802fc31f1db	259	wo->neg_chap = 0; /* Set to 1 on server */
donatien	0:b802fc31f1db	260	wo->neg_upap = 0; /* Set to 1 on server */
donatien	0:b802fc31f1db	261	wo->chap_mdtype = CHAP_DIGEST_MD5;
donatien	0:b802fc31f1db	262	wo->neg_magicnumber = 1;
donatien	0:b802fc31f1db	263	wo->neg_pcompression = 1;
donatien	0:b802fc31f1db	264	wo->neg_accompression = 1;
donatien	0:b802fc31f1db	265	wo->neg_lqr = 0; /* no LQR implementation yet */
donatien	0:b802fc31f1db	266	wo->neg_cbcp = 0;
donatien	0:b802fc31f1db	267
donatien	0:b802fc31f1db	268	ao->neg_mru = 1;
donatien	0:b802fc31f1db	269	ao->mru = PPP_MAXMRU;
donatien	0:b802fc31f1db	270	ao->neg_asyncmap = 1;
donatien	0:b802fc31f1db	271	ao->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
donatien	0:b802fc31f1db	272	ao->neg_chap = (CHAP_SUPPORT != 0);
donatien	0:b802fc31f1db	273	ao->chap_mdtype = CHAP_DIGEST_MD5;
donatien	0:b802fc31f1db	274	ao->neg_upap = (PAP_SUPPORT != 0);
donatien	0:b802fc31f1db	275	ao->neg_magicnumber = 1;
donatien	0:b802fc31f1db	276	ao->neg_pcompression = 1;
donatien	0:b802fc31f1db	277	ao->neg_accompression = 1;
donatien	0:b802fc31f1db	278	ao->neg_lqr = 0; /* no LQR implementation yet */
donatien	0:b802fc31f1db	279	ao->neg_cbcp = (CBCP_SUPPORT != 0);
donatien	0:b802fc31f1db	280
donatien	0:b802fc31f1db	281	/*
donatien	0:b802fc31f1db	282	* Set transmit escape for the flag and escape characters plus anything
donatien	0:b802fc31f1db	283	* set for the allowable options.
donatien	0:b802fc31f1db	284	*/
donatien	0:b802fc31f1db	285	memset(xmit_accm[unit], 0, sizeof(xmit_accm[0]));
donatien	0:b802fc31f1db	286	xmit_accm[unit][15] = 0x60;
donatien	0:b802fc31f1db	287	xmit_accm[unit][0] = (u_char)((ao->asyncmap & 0xFF));
donatien	0:b802fc31f1db	288	xmit_accm[unit][1] = (u_char)((ao->asyncmap >> 8) & 0xFF);
donatien	0:b802fc31f1db	289	xmit_accm[unit][2] = (u_char)((ao->asyncmap >> 16) & 0xFF);
donatien	0:b802fc31f1db	290	xmit_accm[unit][3] = (u_char)((ao->asyncmap >> 24) & 0xFF);
donatien	0:b802fc31f1db	291	LCPDEBUG(LOG_INFO, ("lcp_init: xmit_accm=%X %X %X %X\n",
donatien	0:b802fc31f1db	292	xmit_accm[unit][0],
donatien	0:b802fc31f1db	293	xmit_accm[unit][1],
donatien	0:b802fc31f1db	294	xmit_accm[unit][2],
donatien	0:b802fc31f1db	295	xmit_accm[unit][3]));
donatien	0:b802fc31f1db	296
donatien	0:b802fc31f1db	297	lcp_phase[unit] = PHASE_INITIALIZE;
donatien	0:b802fc31f1db	298	}
donatien	0:b802fc31f1db	299
donatien	0:b802fc31f1db	300
donatien	0:b802fc31f1db	301	/*
donatien	0:b802fc31f1db	302	* lcp_open - LCP is allowed to come up.
donatien	0:b802fc31f1db	303	*/
donatien	0:b802fc31f1db	304	void
donatien	0:b802fc31f1db	305	lcp_open(int unit)
donatien	0:b802fc31f1db	306	{
donatien	0:b802fc31f1db	307	fsm *f = &lcp_fsm[unit];
donatien	0:b802fc31f1db	308	lcp_options *wo = &lcp_wantoptions[unit];
donatien	0:b802fc31f1db	309
donatien	0:b802fc31f1db	310	f->flags = 0;
donatien	0:b802fc31f1db	311	if (wo->passive) {
donatien	0:b802fc31f1db	312	f->flags \|= OPT_PASSIVE;
donatien	0:b802fc31f1db	313	}
donatien	0:b802fc31f1db	314	if (wo->silent) {
donatien	0:b802fc31f1db	315	f->flags \|= OPT_SILENT;
donatien	0:b802fc31f1db	316	}
donatien	0:b802fc31f1db	317	fsm_open(f);
donatien	0:b802fc31f1db	318
donatien	0:b802fc31f1db	319	lcp_phase[unit] = PHASE_ESTABLISH;
donatien	0:b802fc31f1db	320	}
donatien	0:b802fc31f1db	321
donatien	0:b802fc31f1db	322
donatien	0:b802fc31f1db	323	/*
donatien	0:b802fc31f1db	324	* lcp_close - Take LCP down.
donatien	0:b802fc31f1db	325	*/
donatien	0:b802fc31f1db	326	void
donatien	0:b802fc31f1db	327	lcp_close(int unit, char *reason)
donatien	0:b802fc31f1db	328	{
donatien	0:b802fc31f1db	329	fsm *f = &lcp_fsm[unit];
donatien	0:b802fc31f1db	330
donatien	0:b802fc31f1db	331	if (lcp_phase[unit] != PHASE_DEAD) {
donatien	0:b802fc31f1db	332	lcp_phase[unit] = PHASE_TERMINATE;
donatien	0:b802fc31f1db	333	}
donatien	0:b802fc31f1db	334	if (f->state == LS_STOPPED && f->flags & (OPT_PASSIVE\|OPT_SILENT)) {
donatien	0:b802fc31f1db	335	/*
donatien	0:b802fc31f1db	336	* This action is not strictly according to the FSM in RFC1548,
donatien	0:b802fc31f1db	337	* but it does mean that the program terminates if you do an
donatien	0:b802fc31f1db	338	* lcp_close() in passive/silent mode when a connection hasn't
donatien	0:b802fc31f1db	339	* been established.
donatien	0:b802fc31f1db	340	*/
donatien	0:b802fc31f1db	341	f->state = LS_CLOSED;
donatien	0:b802fc31f1db	342	lcp_finished(f);
donatien	0:b802fc31f1db	343	} else {
donatien	0:b802fc31f1db	344	fsm_close(f, reason);
donatien	0:b802fc31f1db	345	}
donatien	0:b802fc31f1db	346	}
donatien	0:b802fc31f1db	347
donatien	0:b802fc31f1db	348
donatien	0:b802fc31f1db	349	/*
donatien	0:b802fc31f1db	350	* lcp_lowerup - The lower layer is up.
donatien	0:b802fc31f1db	351	*/
donatien	0:b802fc31f1db	352	void
donatien	0:b802fc31f1db	353	lcp_lowerup(int unit)
donatien	0:b802fc31f1db	354	{
donatien	0:b802fc31f1db	355	lcp_options *wo = &lcp_wantoptions[unit];
donatien	0:b802fc31f1db	356
donatien	0:b802fc31f1db	357	/*
donatien	0:b802fc31f1db	358	* Don't use A/C or protocol compression on transmission,
donatien	0:b802fc31f1db	359	* but accept A/C and protocol compressed packets
donatien	0:b802fc31f1db	360	* if we are going to ask for A/C and protocol compression.
donatien	0:b802fc31f1db	361	*/
donatien	0:b802fc31f1db	362	ppp_set_xaccm(unit, &xmit_accm[unit]);
donatien	0:b802fc31f1db	363	ppp_send_config(unit, PPP_MRU, 0xffffffffl, 0, 0);
donatien	0:b802fc31f1db	364	ppp_recv_config(unit, PPP_MRU, 0x00000000l,
donatien	0:b802fc31f1db	365	wo->neg_pcompression, wo->neg_accompression);
donatien	0:b802fc31f1db	366	peer_mru[unit] = PPP_MRU;
donatien	0:b802fc31f1db	367	lcp_allowoptions[unit].asyncmap = (u_long)xmit_accm[unit][0]
donatien	0:b802fc31f1db	368	\| ((u_long)xmit_accm[unit][1] << 8)
donatien	0:b802fc31f1db	369	\| ((u_long)xmit_accm[unit][2] << 16)
donatien	0:b802fc31f1db	370	\| ((u_long)xmit_accm[unit][3] << 24);
donatien	0:b802fc31f1db	371	LCPDEBUG(LOG_INFO, ("lcp_lowerup: asyncmap=%X %X %X %X\n",
donatien	0:b802fc31f1db	372	xmit_accm[unit][3],
donatien	0:b802fc31f1db	373	xmit_accm[unit][2],
donatien	0:b802fc31f1db	374	xmit_accm[unit][1],
donatien	0:b802fc31f1db	375	xmit_accm[unit][0]));
donatien	0:b802fc31f1db	376
donatien	0:b802fc31f1db	377	fsm_lowerup(&lcp_fsm[unit]);
donatien	0:b802fc31f1db	378	}
donatien	0:b802fc31f1db	379
donatien	0:b802fc31f1db	380
donatien	0:b802fc31f1db	381	/*
donatien	0:b802fc31f1db	382	* lcp_lowerdown - The lower layer is down.
donatien	0:b802fc31f1db	383	*/
donatien	0:b802fc31f1db	384	void
donatien	0:b802fc31f1db	385	lcp_lowerdown(int unit)
donatien	0:b802fc31f1db	386	{
donatien	0:b802fc31f1db	387	fsm_lowerdown(&lcp_fsm[unit]);
donatien	0:b802fc31f1db	388	}
donatien	0:b802fc31f1db	389
donatien	0:b802fc31f1db	390
donatien	0:b802fc31f1db	391	/*
donatien	0:b802fc31f1db	392	* lcp_input - Input LCP packet.
donatien	0:b802fc31f1db	393	*/
donatien	0:b802fc31f1db	394	static void
donatien	0:b802fc31f1db	395	lcp_input(int unit, u_char *p, int len)
donatien	0:b802fc31f1db	396	{
donatien	0:b802fc31f1db	397	fsm *f = &lcp_fsm[unit];
donatien	0:b802fc31f1db	398
donatien	0:b802fc31f1db	399	fsm_input(f, p, len);
donatien	0:b802fc31f1db	400	}
donatien	0:b802fc31f1db	401
donatien	0:b802fc31f1db	402
donatien	0:b802fc31f1db	403	/*
donatien	0:b802fc31f1db	404	* lcp_extcode - Handle a LCP-specific code.
donatien	0:b802fc31f1db	405	*/
donatien	0:b802fc31f1db	406	static int
donatien	0:b802fc31f1db	407	lcp_extcode(fsm f, int code, u_char id, u_char inp, int len)
donatien	0:b802fc31f1db	408	{
donatien	0:b802fc31f1db	409	u_char *magp;
donatien	0:b802fc31f1db	410
donatien	0:b802fc31f1db	411	switch( code ){
donatien	0:b802fc31f1db	412	case PROTREJ:
donatien	0:b802fc31f1db	413	lcp_rprotrej(f, inp, len);
donatien	0:b802fc31f1db	414	break;
donatien	0:b802fc31f1db	415
donatien	0:b802fc31f1db	416	case ECHOREQ:
donatien	0:b802fc31f1db	417	if (f->state != LS_OPENED) {
donatien	0:b802fc31f1db	418	break;
donatien	0:b802fc31f1db	419	}
donatien	0:b802fc31f1db	420	LCPDEBUG(LOG_INFO, ("lcp: Echo-Request, Rcvd id %d\n", id));
donatien	0:b802fc31f1db	421	magp = inp;
donatien	0:b802fc31f1db	422	PUTLONG(lcp_gotoptions[f->unit].magicnumber, magp);
donatien	0:b802fc31f1db	423	fsm_sdata(f, ECHOREP, id, inp, len);
donatien	0:b802fc31f1db	424	break;
donatien	0:b802fc31f1db	425
donatien	0:b802fc31f1db	426	case ECHOREP:
donatien	0:b802fc31f1db	427	lcp_received_echo_reply(f, id, inp, len);
donatien	0:b802fc31f1db	428	break;
donatien	0:b802fc31f1db	429
donatien	0:b802fc31f1db	430	case DISCREQ:
donatien	0:b802fc31f1db	431	break;
donatien	0:b802fc31f1db	432
donatien	0:b802fc31f1db	433	default:
donatien	0:b802fc31f1db	434	return 0;
donatien	0:b802fc31f1db	435	}
donatien	0:b802fc31f1db	436	return 1;
donatien	0:b802fc31f1db	437	}
donatien	0:b802fc31f1db	438
donatien	0:b802fc31f1db	439
donatien	0:b802fc31f1db	440	/*
donatien	0:b802fc31f1db	441	* lcp_rprotrej - Receive an Protocol-Reject.
donatien	0:b802fc31f1db	442	*
donatien	0:b802fc31f1db	443	* Figure out which protocol is rejected and inform it.
donatien	0:b802fc31f1db	444	*/
donatien	0:b802fc31f1db	445	static void
donatien	0:b802fc31f1db	446	lcp_rprotrej(fsm f, u_char inp, int len)
donatien	0:b802fc31f1db	447	{
donatien	0:b802fc31f1db	448	int i;
donatien	0:b802fc31f1db	449	struct protent *protp;
donatien	0:b802fc31f1db	450	u_short prot;
donatien	0:b802fc31f1db	451
donatien	0:b802fc31f1db	452	if (len < (int)sizeof (u_short)) {
donatien	0:b802fc31f1db	453	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd short Protocol-Reject packet!\n"));
donatien	0:b802fc31f1db	454	return;
donatien	0:b802fc31f1db	455	}
donatien	0:b802fc31f1db	456
donatien	0:b802fc31f1db	457	GETSHORT(prot, inp);
donatien	0:b802fc31f1db	458
donatien	0:b802fc31f1db	459	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd Protocol-Reject packet for %x!\n", prot));
donatien	0:b802fc31f1db	460
donatien	0:b802fc31f1db	461	/*
donatien	0:b802fc31f1db	462	* Protocol-Reject packets received in any state other than the LCP
donatien	0:b802fc31f1db	463	* LS_OPENED state SHOULD be silently discarded.
donatien	0:b802fc31f1db	464	*/
donatien	0:b802fc31f1db	465	if( f->state != LS_OPENED ) {
donatien	0:b802fc31f1db	466	LCPDEBUG(LOG_INFO, ("Protocol-Reject discarded: LCP in state %d\n", f->state));
donatien	0:b802fc31f1db	467	return;
donatien	0:b802fc31f1db	468	}
donatien	0:b802fc31f1db	469
donatien	0:b802fc31f1db	470	/*
donatien	0:b802fc31f1db	471	* Upcall the proper Protocol-Reject routine.
donatien	0:b802fc31f1db	472	*/
donatien	0:b802fc31f1db	473	for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
donatien	0:b802fc31f1db	474	if (protp->protocol == prot && protp->enabled_flag) {
donatien	0:b802fc31f1db	475	(*protp->protrej)(f->unit);
donatien	0:b802fc31f1db	476	return;
donatien	0:b802fc31f1db	477	}
donatien	0:b802fc31f1db	478	}
donatien	0:b802fc31f1db	479
donatien	0:b802fc31f1db	480	LCPDEBUG(LOG_WARNING, ("Protocol-Reject for unsupported protocol 0x%x\n", prot));
donatien	0:b802fc31f1db	481	}
donatien	0:b802fc31f1db	482
donatien	0:b802fc31f1db	483
donatien	0:b802fc31f1db	484	/*
donatien	0:b802fc31f1db	485	* lcp_protrej - A Protocol-Reject was received.
donatien	0:b802fc31f1db	486	*/
donatien	0:b802fc31f1db	487	static void
donatien	0:b802fc31f1db	488	lcp_protrej(int unit)
donatien	0:b802fc31f1db	489	{
donatien	0:b802fc31f1db	490	LWIP_UNUSED_ARG(unit);
donatien	0:b802fc31f1db	491	/*
donatien	0:b802fc31f1db	492	* Can't reject LCP!
donatien	0:b802fc31f1db	493	*/
donatien	0:b802fc31f1db	494	LCPDEBUG(LOG_WARNING, ("lcp_protrej: Received Protocol-Reject for LCP!\n"));
donatien	0:b802fc31f1db	495	fsm_protreject(&lcp_fsm[unit]);
donatien	0:b802fc31f1db	496	}
donatien	0:b802fc31f1db	497
donatien	0:b802fc31f1db	498
donatien	0:b802fc31f1db	499	/*
donatien	0:b802fc31f1db	500	* lcp_sprotrej - Send a Protocol-Reject for some protocol.
donatien	0:b802fc31f1db	501	*/
donatien	0:b802fc31f1db	502	void
donatien	0:b802fc31f1db	503	lcp_sprotrej(int unit, u_char *p, int len)
donatien	0:b802fc31f1db	504	{
donatien	0:b802fc31f1db	505	/*
donatien	0:b802fc31f1db	506	* Send back the protocol and the information field of the
donatien	0:b802fc31f1db	507	* rejected packet. We only get here if LCP is in the LS_OPENED state.
donatien	0:b802fc31f1db	508	*/
donatien	0:b802fc31f1db	509
donatien	0:b802fc31f1db	510	fsm_sdata(&lcp_fsm[unit], PROTREJ, ++lcp_fsm[unit].id, p, len);
donatien	0:b802fc31f1db	511	}
donatien	0:b802fc31f1db	512
donatien	0:b802fc31f1db	513
donatien	0:b802fc31f1db	514	/*
donatien	0:b802fc31f1db	515	* lcp_resetci - Reset our CI.
donatien	0:b802fc31f1db	516	*/
donatien	0:b802fc31f1db	517	static void
donatien	0:b802fc31f1db	518	lcp_resetci(fsm *f)
donatien	0:b802fc31f1db	519	{
donatien	0:b802fc31f1db	520	lcp_wantoptions[f->unit].magicnumber = magic();
donatien	0:b802fc31f1db	521	lcp_wantoptions[f->unit].numloops = 0;
donatien	0:b802fc31f1db	522	lcp_gotoptions[f->unit] = lcp_wantoptions[f->unit];
donatien	0:b802fc31f1db	523	peer_mru[f->unit] = PPP_MRU;
donatien	0:b802fc31f1db	524	auth_reset(f->unit);
donatien	0:b802fc31f1db	525	}
donatien	0:b802fc31f1db	526
donatien	0:b802fc31f1db	527
donatien	0:b802fc31f1db	528	/*
donatien	0:b802fc31f1db	529	* lcp_cilen - Return length of our CI.
donatien	0:b802fc31f1db	530	*/
donatien	0:b802fc31f1db	531	static int
donatien	0:b802fc31f1db	532	lcp_cilen(fsm *f)
donatien	0:b802fc31f1db	533	{
donatien	0:b802fc31f1db	534	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:b802fc31f1db	535
donatien	0:b802fc31f1db	536	#define LENCIVOID(neg) ((neg) ? CILEN_VOID : 0)
donatien	0:b802fc31f1db	537	#define LENCICHAP(neg) ((neg) ? CILEN_CHAP : 0)
donatien	0:b802fc31f1db	538	#define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0)
donatien	0:b802fc31f1db	539	#define LENCILONG(neg) ((neg) ? CILEN_LONG : 0)
donatien	0:b802fc31f1db	540	#define LENCILQR(neg) ((neg) ? CILEN_LQR: 0)
donatien	0:b802fc31f1db	541	#define LENCICBCP(neg) ((neg) ? CILEN_CBCP: 0)
donatien	0:b802fc31f1db	542	/*
donatien	0:b802fc31f1db	543	* NB: we only ask for one of CHAP and UPAP, even if we will
donatien	0:b802fc31f1db	544	* accept either.
donatien	0:b802fc31f1db	545	*/
donatien	0:b802fc31f1db	546	return (LENCISHORT(go->neg_mru && go->mru != PPP_DEFMRU) +
donatien	0:b802fc31f1db	547	LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) +
donatien	0:b802fc31f1db	548	LENCICHAP(go->neg_chap) +
donatien	0:b802fc31f1db	549	LENCISHORT(!go->neg_chap && go->neg_upap) +
donatien	0:b802fc31f1db	550	LENCILQR(go->neg_lqr) +
donatien	0:b802fc31f1db	551	LENCICBCP(go->neg_cbcp) +
donatien	0:b802fc31f1db	552	LENCILONG(go->neg_magicnumber) +
donatien	0:b802fc31f1db	553	LENCIVOID(go->neg_pcompression) +
donatien	0:b802fc31f1db	554	LENCIVOID(go->neg_accompression));
donatien	0:b802fc31f1db	555	}
donatien	0:b802fc31f1db	556
donatien	0:b802fc31f1db	557
donatien	0:b802fc31f1db	558	/*
donatien	0:b802fc31f1db	559	* lcp_addci - Add our desired CIs to a packet.
donatien	0:b802fc31f1db	560	*/
donatien	0:b802fc31f1db	561	static void
donatien	0:b802fc31f1db	562	lcp_addci(fsm f, u_char ucp, int *lenp)
donatien	0:b802fc31f1db	563	{
donatien	0:b802fc31f1db	564	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:b802fc31f1db	565	u_char *start_ucp = ucp;
donatien	0:b802fc31f1db	566
donatien	0:b802fc31f1db	567	#define ADDCIVOID(opt, neg) \
donatien	0:b802fc31f1db	568	if (neg) { \
donatien	0:b802fc31f1db	569	LCPDEBUG(LOG_INFO, ("lcp_addci: opt=%d\n", opt)); \
donatien	0:b802fc31f1db	570	PUTCHAR(opt, ucp); \
donatien	0:b802fc31f1db	571	PUTCHAR(CILEN_VOID, ucp); \
donatien	0:b802fc31f1db	572	}
donatien	0:b802fc31f1db	573	#define ADDCISHORT(opt, neg, val) \
donatien	0:b802fc31f1db	574	if (neg) { \
donatien	0:b802fc31f1db	575	LCPDEBUG(LOG_INFO, ("lcp_addci: INT opt=%d %X\n", opt, val)); \
donatien	0:b802fc31f1db	576	PUTCHAR(opt, ucp); \
donatien	0:b802fc31f1db	577	PUTCHAR(CILEN_SHORT, ucp); \
donatien	0:b802fc31f1db	578	PUTSHORT(val, ucp); \
donatien	0:b802fc31f1db	579	}
donatien	0:b802fc31f1db	580	#define ADDCICHAP(opt, neg, val, digest) \
donatien	0:b802fc31f1db	581	if (neg) { \
donatien	0:b802fc31f1db	582	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAP opt=%d %X\n", opt, val)); \
donatien	0:b802fc31f1db	583	PUTCHAR(opt, ucp); \
donatien	0:b802fc31f1db	584	PUTCHAR(CILEN_CHAP, ucp); \
donatien	0:b802fc31f1db	585	PUTSHORT(val, ucp); \
donatien	0:b802fc31f1db	586	PUTCHAR(digest, ucp); \
donatien	0:b802fc31f1db	587	}
donatien	0:b802fc31f1db	588	#define ADDCILONG(opt, neg, val) \
donatien	0:b802fc31f1db	589	if (neg) { \
donatien	0:b802fc31f1db	590	LCPDEBUG(LOG_INFO, ("lcp_addci: L opt=%d %lX\n", opt, val)); \
donatien	0:b802fc31f1db	591	PUTCHAR(opt, ucp); \
donatien	0:b802fc31f1db	592	PUTCHAR(CILEN_LONG, ucp); \
donatien	0:b802fc31f1db	593	PUTLONG(val, ucp); \
donatien	0:b802fc31f1db	594	}
donatien	0:b802fc31f1db	595	#define ADDCILQR(opt, neg, val) \
donatien	0:b802fc31f1db	596	if (neg) { \
donatien	0:b802fc31f1db	597	LCPDEBUG(LOG_INFO, ("lcp_addci: LQR opt=%d %lX\n", opt, val)); \
donatien	0:b802fc31f1db	598	PUTCHAR(opt, ucp); \
donatien	0:b802fc31f1db	599	PUTCHAR(CILEN_LQR, ucp); \
donatien	0:b802fc31f1db	600	PUTSHORT(PPP_LQR, ucp); \
donatien	0:b802fc31f1db	601	PUTLONG(val, ucp); \
donatien	0:b802fc31f1db	602	}
donatien	0:b802fc31f1db	603	#define ADDCICHAR(opt, neg, val) \
donatien	0:b802fc31f1db	604	if (neg) { \
donatien	0:b802fc31f1db	605	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAR opt=%d %X '%z'\n", opt, val, val)); \
donatien	0:b802fc31f1db	606	PUTCHAR(opt, ucp); \
donatien	0:b802fc31f1db	607	PUTCHAR(CILEN_CHAR, ucp); \
donatien	0:b802fc31f1db	608	PUTCHAR(val, ucp); \
donatien	0:b802fc31f1db	609	}
donatien	0:b802fc31f1db	610
donatien	0:b802fc31f1db	611	ADDCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
donatien	0:b802fc31f1db	612	ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
donatien	0:b802fc31f1db	613	ADDCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
donatien	0:b802fc31f1db	614	ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
donatien	0:b802fc31f1db	615	ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
donatien	0:b802fc31f1db	616	ADDCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
donatien	0:b802fc31f1db	617	ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
donatien	0:b802fc31f1db	618	ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
donatien	0:b802fc31f1db	619	ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
donatien	0:b802fc31f1db	620
donatien	0:b802fc31f1db	621	if (ucp - start_ucp != *lenp) {
donatien	0:b802fc31f1db	622	/* this should never happen, because peer_mtu should be 1500 */
donatien	0:b802fc31f1db	623	LCPDEBUG(LOG_ERR, ("Bug in lcp_addci: wrong length\n"));
donatien	0:b802fc31f1db	624	}
donatien	0:b802fc31f1db	625	}
donatien	0:b802fc31f1db	626
donatien	0:b802fc31f1db	627
donatien	0:b802fc31f1db	628	/*
donatien	0:b802fc31f1db	629	* lcp_ackci - Ack our CIs.
donatien	0:b802fc31f1db	630	* This should not modify any state if the Ack is bad.
donatien	0:b802fc31f1db	631	*
donatien	0:b802fc31f1db	632	* Returns:
donatien	0:b802fc31f1db	633	* 0 - Ack was bad.
donatien	0:b802fc31f1db	634	* 1 - Ack was good.
donatien	0:b802fc31f1db	635	*/
donatien	0:b802fc31f1db	636	static int
donatien	0:b802fc31f1db	637	lcp_ackci(fsm f, u_char p, int len)
donatien	0:b802fc31f1db	638	{
donatien	0:b802fc31f1db	639	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:b802fc31f1db	640	u_char cilen, citype, cichar;
donatien	0:b802fc31f1db	641	u_short cishort;
donatien	0:b802fc31f1db	642	u32_t cilong;
donatien	0:b802fc31f1db	643
donatien	0:b802fc31f1db	644	/*
donatien	0:b802fc31f1db	645	* CIs must be in exactly the same order that we sent.
donatien	0:b802fc31f1db	646	* Check packet length and CI length at each step.
donatien	0:b802fc31f1db	647	* If we find any deviations, then this packet is bad.
donatien	0:b802fc31f1db	648	*/
donatien	0:b802fc31f1db	649	#define ACKCIVOID(opt, neg) \
donatien	0:b802fc31f1db	650	if (neg) { \
donatien	0:b802fc31f1db	651	if ((len -= CILEN_VOID) < 0) \
donatien	0:b802fc31f1db	652	goto bad; \
donatien	0:b802fc31f1db	653	GETCHAR(citype, p); \
donatien	0:b802fc31f1db	654	GETCHAR(cilen, p); \
donatien	0:b802fc31f1db	655	if (cilen != CILEN_VOID \|\| citype != opt) \
donatien	0:b802fc31f1db	656	goto bad; \
donatien	0:b802fc31f1db	657	}
donatien	0:b802fc31f1db	658	#define ACKCISHORT(opt, neg, val) \
donatien	0:b802fc31f1db	659	if (neg) { \
donatien	0:b802fc31f1db	660	if ((len -= CILEN_SHORT) < 0) \
donatien	0:b802fc31f1db	661	goto bad; \
donatien	0:b802fc31f1db	662	GETCHAR(citype, p); \
donatien	0:b802fc31f1db	663	GETCHAR(cilen, p); \
donatien	0:b802fc31f1db	664	if (cilen != CILEN_SHORT \|\| citype != opt) \
donatien	0:b802fc31f1db	665	goto bad; \
donatien	0:b802fc31f1db	666	GETSHORT(cishort, p); \
donatien	0:b802fc31f1db	667	if (cishort != val) \
donatien	0:b802fc31f1db	668	goto bad; \
donatien	0:b802fc31f1db	669	}
donatien	0:b802fc31f1db	670	#define ACKCICHAR(opt, neg, val) \
donatien	0:b802fc31f1db	671	if (neg) { \
donatien	0:b802fc31f1db	672	if ((len -= CILEN_CHAR) < 0) \
donatien	0:b802fc31f1db	673	goto bad; \
donatien	0:b802fc31f1db	674	GETCHAR(citype, p); \
donatien	0:b802fc31f1db	675	GETCHAR(cilen, p); \
donatien	0:b802fc31f1db	676	if (cilen != CILEN_CHAR \|\| citype != opt) \
donatien	0:b802fc31f1db	677	goto bad; \
donatien	0:b802fc31f1db	678	GETCHAR(cichar, p); \
donatien	0:b802fc31f1db	679	if (cichar != val) \
donatien	0:b802fc31f1db	680	goto bad; \
donatien	0:b802fc31f1db	681	}
donatien	0:b802fc31f1db	682	#define ACKCICHAP(opt, neg, val, digest) \
donatien	0:b802fc31f1db	683	if (neg) { \
donatien	0:b802fc31f1db	684	if ((len -= CILEN_CHAP) < 0) \
donatien	0:b802fc31f1db	685	goto bad; \
donatien	0:b802fc31f1db	686	GETCHAR(citype, p); \
donatien	0:b802fc31f1db	687	GETCHAR(cilen, p); \
donatien	0:b802fc31f1db	688	if (cilen != CILEN_CHAP \|\| citype != opt) \
donatien	0:b802fc31f1db	689	goto bad; \
donatien	0:b802fc31f1db	690	GETSHORT(cishort, p); \
donatien	0:b802fc31f1db	691	if (cishort != val) \
donatien	0:b802fc31f1db	692	goto bad; \
donatien	0:b802fc31f1db	693	GETCHAR(cichar, p); \
donatien	0:b802fc31f1db	694	if (cichar != digest) \
donatien	0:b802fc31f1db	695	goto bad; \
donatien	0:b802fc31f1db	696	}
donatien	0:b802fc31f1db	697	#define ACKCILONG(opt, neg, val) \
donatien	0:b802fc31f1db	698	if (neg) { \
donatien	0:b802fc31f1db	699	if ((len -= CILEN_LONG) < 0) \
donatien	0:b802fc31f1db	700	goto bad; \
donatien	0:b802fc31f1db	701	GETCHAR(citype, p); \
donatien	0:b802fc31f1db	702	GETCHAR(cilen, p); \
donatien	0:b802fc31f1db	703	if (cilen != CILEN_LONG \|\| citype != opt) \
donatien	0:b802fc31f1db	704	goto bad; \
donatien	0:b802fc31f1db	705	GETLONG(cilong, p); \
donatien	0:b802fc31f1db	706	if (cilong != val) \
donatien	0:b802fc31f1db	707	goto bad; \
donatien	0:b802fc31f1db	708	}
donatien	0:b802fc31f1db	709	#define ACKCILQR(opt, neg, val) \
donatien	0:b802fc31f1db	710	if (neg) { \
donatien	0:b802fc31f1db	711	if ((len -= CILEN_LQR) < 0) \
donatien	0:b802fc31f1db	712	goto bad; \
donatien	0:b802fc31f1db	713	GETCHAR(citype, p); \
donatien	0:b802fc31f1db	714	GETCHAR(cilen, p); \
donatien	0:b802fc31f1db	715	if (cilen != CILEN_LQR \|\| citype != opt) \
donatien	0:b802fc31f1db	716	goto bad; \
donatien	0:b802fc31f1db	717	GETSHORT(cishort, p); \
donatien	0:b802fc31f1db	718	if (cishort != PPP_LQR) \
donatien	0:b802fc31f1db	719	goto bad; \
donatien	0:b802fc31f1db	720	GETLONG(cilong, p); \
donatien	0:b802fc31f1db	721	if (cilong != val) \
donatien	0:b802fc31f1db	722	goto bad; \
donatien	0:b802fc31f1db	723	}
donatien	0:b802fc31f1db	724
donatien	0:b802fc31f1db	725	ACKCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
donatien	0:b802fc31f1db	726	ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
donatien	0:b802fc31f1db	727	ACKCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
donatien	0:b802fc31f1db	728	ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
donatien	0:b802fc31f1db	729	ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
donatien	0:b802fc31f1db	730	ACKCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
donatien	0:b802fc31f1db	731	ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
donatien	0:b802fc31f1db	732	ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
donatien	0:b802fc31f1db	733	ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
donatien	0:b802fc31f1db	734
donatien	0:b802fc31f1db	735	/*
donatien	0:b802fc31f1db	736	* If there are any remaining CIs, then this packet is bad.
donatien	0:b802fc31f1db	737	*/
donatien	0:b802fc31f1db	738	if (len != 0) {
donatien	0:b802fc31f1db	739	goto bad;
donatien	0:b802fc31f1db	740	}
donatien	0:b802fc31f1db	741	LCPDEBUG(LOG_INFO, ("lcp_acki: Ack\n"));
donatien	0:b802fc31f1db	742	return (1);
donatien	0:b802fc31f1db	743	bad:
donatien	0:b802fc31f1db	744	LCPDEBUG(LOG_WARNING, ("lcp_acki: received bad Ack!\n"));
donatien	0:b802fc31f1db	745	return (0);
donatien	0:b802fc31f1db	746	}
donatien	0:b802fc31f1db	747
donatien	0:b802fc31f1db	748
donatien	0:b802fc31f1db	749	/*
donatien	0:b802fc31f1db	750	* lcp_nakci - Peer has sent a NAK for some of our CIs.
donatien	0:b802fc31f1db	751	* This should not modify any state if the Nak is bad
donatien	0:b802fc31f1db	752	* or if LCP is in the LS_OPENED state.
donatien	0:b802fc31f1db	753	*
donatien	0:b802fc31f1db	754	* Returns:
donatien	0:b802fc31f1db	755	* 0 - Nak was bad.
donatien	0:b802fc31f1db	756	* 1 - Nak was good.
donatien	0:b802fc31f1db	757	*/
donatien	0:b802fc31f1db	758	static int
donatien	0:b802fc31f1db	759	lcp_nakci(fsm f, u_char p, int len)
donatien	0:b802fc31f1db	760	{
donatien	0:b802fc31f1db	761	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:b802fc31f1db	762	lcp_options *wo = &lcp_wantoptions[f->unit];
donatien	0:b802fc31f1db	763	u_char citype, cichar, *next;
donatien	0:b802fc31f1db	764	u_short cishort;
donatien	0:b802fc31f1db	765	u32_t cilong;
donatien	0:b802fc31f1db	766	lcp_options no; /* options we've seen Naks for */
donatien	0:b802fc31f1db	767	lcp_options try; /* options to request next time */
donatien	0:b802fc31f1db	768	int looped_back = 0;
donatien	0:b802fc31f1db	769	int cilen;
donatien	0:b802fc31f1db	770
donatien	0:b802fc31f1db	771	BZERO(&no, sizeof(no));
donatien	0:b802fc31f1db	772	try = *go;
donatien	0:b802fc31f1db	773
donatien	0:b802fc31f1db	774	/*
donatien	0:b802fc31f1db	775	* Any Nak'd CIs must be in exactly the same order that we sent.
donatien	0:b802fc31f1db	776	* Check packet length and CI length at each step.
donatien	0:b802fc31f1db	777	* If we find any deviations, then this packet is bad.
donatien	0:b802fc31f1db	778	*/
donatien	0:b802fc31f1db	779	#define NAKCIVOID(opt, neg, code) \
donatien	0:b802fc31f1db	780	if (go->neg && \
donatien	0:b802fc31f1db	781	len >= CILEN_VOID && \
donatien	0:b802fc31f1db	782	p[1] == CILEN_VOID && \
donatien	0:b802fc31f1db	783	p[0] == opt) { \
donatien	0:b802fc31f1db	784	len -= CILEN_VOID; \
donatien	0:b802fc31f1db	785	INCPTR(CILEN_VOID, p); \
donatien	0:b802fc31f1db	786	no.neg = 1; \
donatien	0:b802fc31f1db	787	code \
donatien	0:b802fc31f1db	788	}
donatien	0:b802fc31f1db	789	#define NAKCICHAP(opt, neg, code) \
donatien	0:b802fc31f1db	790	if (go->neg && \
donatien	0:b802fc31f1db	791	len >= CILEN_CHAP && \
donatien	0:b802fc31f1db	792	p[1] == CILEN_CHAP && \
donatien	0:b802fc31f1db	793	p[0] == opt) { \
donatien	0:b802fc31f1db	794	len -= CILEN_CHAP; \
donatien	0:b802fc31f1db	795	INCPTR(2, p); \
donatien	0:b802fc31f1db	796	GETSHORT(cishort, p); \
donatien	0:b802fc31f1db	797	GETCHAR(cichar, p); \
donatien	0:b802fc31f1db	798	no.neg = 1; \
donatien	0:b802fc31f1db	799	code \
donatien	0:b802fc31f1db	800	}
donatien	0:b802fc31f1db	801	#define NAKCICHAR(opt, neg, code) \
donatien	0:b802fc31f1db	802	if (go->neg && \
donatien	0:b802fc31f1db	803	len >= CILEN_CHAR && \
donatien	0:b802fc31f1db	804	p[1] == CILEN_CHAR && \
donatien	0:b802fc31f1db	805	p[0] == opt) { \
donatien	0:b802fc31f1db	806	len -= CILEN_CHAR; \
donatien	0:b802fc31f1db	807	INCPTR(2, p); \
donatien	0:b802fc31f1db	808	GETCHAR(cichar, p); \
donatien	0:b802fc31f1db	809	no.neg = 1; \
donatien	0:b802fc31f1db	810	code \
donatien	0:b802fc31f1db	811	}
donatien	0:b802fc31f1db	812	#define NAKCISHORT(opt, neg, code) \
donatien	0:b802fc31f1db	813	if (go->neg && \
donatien	0:b802fc31f1db	814	len >= CILEN_SHORT && \
donatien	0:b802fc31f1db	815	p[1] == CILEN_SHORT && \
donatien	0:b802fc31f1db	816	p[0] == opt) { \
donatien	0:b802fc31f1db	817	len -= CILEN_SHORT; \
donatien	0:b802fc31f1db	818	INCPTR(2, p); \
donatien	0:b802fc31f1db	819	GETSHORT(cishort, p); \
donatien	0:b802fc31f1db	820	no.neg = 1; \
donatien	0:b802fc31f1db	821	code \
donatien	0:b802fc31f1db	822	}
donatien	0:b802fc31f1db	823	#define NAKCILONG(opt, neg, code) \
donatien	0:b802fc31f1db	824	if (go->neg && \
donatien	0:b802fc31f1db	825	len >= CILEN_LONG && \
donatien	0:b802fc31f1db	826	p[1] == CILEN_LONG && \
donatien	0:b802fc31f1db	827	p[0] == opt) { \
donatien	0:b802fc31f1db	828	len -= CILEN_LONG; \
donatien	0:b802fc31f1db	829	INCPTR(2, p); \
donatien	0:b802fc31f1db	830	GETLONG(cilong, p); \
donatien	0:b802fc31f1db	831	no.neg = 1; \
donatien	0:b802fc31f1db	832	code \
donatien	0:b802fc31f1db	833	}
donatien	0:b802fc31f1db	834	#define NAKCILQR(opt, neg, code) \
donatien	0:b802fc31f1db	835	if (go->neg && \
donatien	0:b802fc31f1db	836	len >= CILEN_LQR && \
donatien	0:b802fc31f1db	837	p[1] == CILEN_LQR && \
donatien	0:b802fc31f1db	838	p[0] == opt) { \
donatien	0:b802fc31f1db	839	len -= CILEN_LQR; \
donatien	0:b802fc31f1db	840	INCPTR(2, p); \
donatien	0:b802fc31f1db	841	GETSHORT(cishort, p); \
donatien	0:b802fc31f1db	842	GETLONG(cilong, p); \
donatien	0:b802fc31f1db	843	no.neg = 1; \
donatien	0:b802fc31f1db	844	code \
donatien	0:b802fc31f1db	845	}
donatien	0:b802fc31f1db	846
donatien	0:b802fc31f1db	847	/*
donatien	0:b802fc31f1db	848	* We don't care if they want to send us smaller packets than
donatien	0:b802fc31f1db	849	* we want. Therefore, accept any MRU less than what we asked for,
donatien	0:b802fc31f1db	850	* but then ignore the new value when setting the MRU in the kernel.
donatien	0:b802fc31f1db	851	* If they send us a bigger MRU than what we asked, accept it, up to
donatien	0:b802fc31f1db	852	* the limit of the default MRU we'd get if we didn't negotiate.
donatien	0:b802fc31f1db	853	*/
donatien	0:b802fc31f1db	854	if (go->neg_mru && go->mru != PPP_DEFMRU) {
donatien	0:b802fc31f1db	855	NAKCISHORT(CI_MRU, neg_mru,
donatien	0:b802fc31f1db	856	if (cishort <= wo->mru \|\| cishort < PPP_DEFMRU) {
donatien	0:b802fc31f1db	857	try.mru = cishort;
donatien	0:b802fc31f1db	858	}
donatien	0:b802fc31f1db	859	);
donatien	0:b802fc31f1db	860	}
donatien	0:b802fc31f1db	861
donatien	0:b802fc31f1db	862	/*
donatien	0:b802fc31f1db	863	* Add any characters they want to our (receive-side) asyncmap.
donatien	0:b802fc31f1db	864	*/
donatien	0:b802fc31f1db	865	if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) {
donatien	0:b802fc31f1db	866	NAKCILONG(CI_ASYNCMAP, neg_asyncmap,
donatien	0:b802fc31f1db	867	try.asyncmap = go->asyncmap \| cilong;
donatien	0:b802fc31f1db	868	);
donatien	0:b802fc31f1db	869	}
donatien	0:b802fc31f1db	870
donatien	0:b802fc31f1db	871	/*
donatien	0:b802fc31f1db	872	* If they've nak'd our authentication-protocol, check whether
donatien	0:b802fc31f1db	873	* they are proposing a different protocol, or a different
donatien	0:b802fc31f1db	874	* hash algorithm for CHAP.
donatien	0:b802fc31f1db	875	*/
donatien	0:b802fc31f1db	876	if ((go->neg_chap \|\| go->neg_upap)
donatien	0:b802fc31f1db	877	&& len >= CILEN_SHORT
donatien	0:b802fc31f1db	878	&& p[0] == CI_AUTHTYPE && p[1] >= CILEN_SHORT && p[1] <= len) {
donatien	0:b802fc31f1db	879	cilen = p[1];
donatien	0:b802fc31f1db	880	len -= cilen;
donatien	0:b802fc31f1db	881	no.neg_chap = go->neg_chap;
donatien	0:b802fc31f1db	882	no.neg_upap = go->neg_upap;
donatien	0:b802fc31f1db	883	INCPTR(2, p);
donatien	0:b802fc31f1db	884	GETSHORT(cishort, p);
donatien	0:b802fc31f1db	885	if (cishort == PPP_PAP && cilen == CILEN_SHORT) {
donatien	0:b802fc31f1db	886	/*
donatien	0:b802fc31f1db	887	* If we were asking for CHAP, they obviously don't want to do it.
donatien	0:b802fc31f1db	888	* If we weren't asking for CHAP, then we were asking for PAP,
donatien	0:b802fc31f1db	889	* in which case this Nak is bad.
donatien	0:b802fc31f1db	890	*/
donatien	0:b802fc31f1db	891	if (!go->neg_chap) {
donatien	0:b802fc31f1db	892	goto bad;
donatien	0:b802fc31f1db	893	}
donatien	0:b802fc31f1db	894	try.neg_chap = 0;
donatien	0:b802fc31f1db	895
donatien	0:b802fc31f1db	896	} else if (cishort == PPP_CHAP && cilen == CILEN_CHAP) {
donatien	0:b802fc31f1db	897	GETCHAR(cichar, p);
donatien	0:b802fc31f1db	898	if (go->neg_chap) {
donatien	0:b802fc31f1db	899	/*
donatien	0:b802fc31f1db	900	* We were asking for CHAP/MD5; they must want a different
donatien	0:b802fc31f1db	901	* algorithm. If they can't do MD5, we'll have to stop
donatien	0:b802fc31f1db	902	* asking for CHAP.
donatien	0:b802fc31f1db	903	*/
donatien	0:b802fc31f1db	904	if (cichar != go->chap_mdtype) {
donatien	0:b802fc31f1db	905	try.neg_chap = 0;
donatien	0:b802fc31f1db	906	}
donatien	0:b802fc31f1db	907	} else {
donatien	0:b802fc31f1db	908	/*
donatien	0:b802fc31f1db	909	* Stop asking for PAP if we were asking for it.
donatien	0:b802fc31f1db	910	*/
donatien	0:b802fc31f1db	911	try.neg_upap = 0;
donatien	0:b802fc31f1db	912	}
donatien	0:b802fc31f1db	913
donatien	0:b802fc31f1db	914	} else {
donatien	0:b802fc31f1db	915	/*
donatien	0:b802fc31f1db	916	* We don't recognize what they're suggesting.
donatien	0:b802fc31f1db	917	* Stop asking for what we were asking for.
donatien	0:b802fc31f1db	918	*/
donatien	0:b802fc31f1db	919	if (go->neg_chap) {
donatien	0:b802fc31f1db	920	try.neg_chap = 0;
donatien	0:b802fc31f1db	921	} else {
donatien	0:b802fc31f1db	922	try.neg_upap = 0;
donatien	0:b802fc31f1db	923	}
donatien	0:b802fc31f1db	924	p += cilen - CILEN_SHORT;
donatien	0:b802fc31f1db	925	}
donatien	0:b802fc31f1db	926	}
donatien	0:b802fc31f1db	927
donatien	0:b802fc31f1db	928	/*
donatien	0:b802fc31f1db	929	* If they can't cope with our link quality protocol, we'll have
donatien	0:b802fc31f1db	930	* to stop asking for LQR. We haven't got any other protocol.
donatien	0:b802fc31f1db	931	* If they Nak the reporting period, take their value XXX ?
donatien	0:b802fc31f1db	932	*/
donatien	0:b802fc31f1db	933	NAKCILQR(CI_QUALITY, neg_lqr,
donatien	0:b802fc31f1db	934	if (cishort != PPP_LQR) {
donatien	0:b802fc31f1db	935	try.neg_lqr = 0;
donatien	0:b802fc31f1db	936	} else {
donatien	0:b802fc31f1db	937	try.lqr_period = cilong;
donatien	0:b802fc31f1db	938	}
donatien	0:b802fc31f1db	939	);
donatien	0:b802fc31f1db	940
donatien	0:b802fc31f1db	941	/*
donatien	0:b802fc31f1db	942	* Only implementing CBCP...not the rest of the callback options
donatien	0:b802fc31f1db	943	*/
donatien	0:b802fc31f1db	944	NAKCICHAR(CI_CALLBACK, neg_cbcp,
donatien	0:b802fc31f1db	945	try.neg_cbcp = 0;
donatien	0:b802fc31f1db	946	);
donatien	0:b802fc31f1db	947
donatien	0:b802fc31f1db	948	/*
donatien	0:b802fc31f1db	949	* Check for a looped-back line.
donatien	0:b802fc31f1db	950	*/
donatien	0:b802fc31f1db	951	NAKCILONG(CI_MAGICNUMBER, neg_magicnumber,
donatien	0:b802fc31f1db	952	try.magicnumber = magic();
donatien	0:b802fc31f1db	953	looped_back = 1;
donatien	0:b802fc31f1db	954	);
donatien	0:b802fc31f1db	955
donatien	0:b802fc31f1db	956	/*
donatien	0:b802fc31f1db	957	* Peer shouldn't send Nak for protocol compression or
donatien	0:b802fc31f1db	958	* address/control compression requests; they should send
donatien	0:b802fc31f1db	959	* a Reject instead. If they send a Nak, treat it as a Reject.
donatien	0:b802fc31f1db	960	*/
donatien	0:b802fc31f1db	961	NAKCIVOID(CI_PCOMPRESSION, neg_pcompression,
donatien	0:b802fc31f1db	962	try.neg_pcompression = 0;
donatien	0:b802fc31f1db	963	);
donatien	0:b802fc31f1db	964	NAKCIVOID(CI_ACCOMPRESSION, neg_accompression,
donatien	0:b802fc31f1db	965	try.neg_accompression = 0;
donatien	0:b802fc31f1db	966	);
donatien	0:b802fc31f1db	967
donatien	0:b802fc31f1db	968	/*
donatien	0:b802fc31f1db	969	* There may be remaining CIs, if the peer is requesting negotiation
donatien	0:b802fc31f1db	970	* on an option that we didn't include in our request packet.
donatien	0:b802fc31f1db	971	* If we see an option that we requested, or one we've already seen
donatien	0:b802fc31f1db	972	* in this packet, then this packet is bad.
donatien	0:b802fc31f1db	973	* If we wanted to respond by starting to negotiate on the requested
donatien	0:b802fc31f1db	974	* option(s), we could, but we don't, because except for the
donatien	0:b802fc31f1db	975	* authentication type and quality protocol, if we are not negotiating
donatien	0:b802fc31f1db	976	* an option, it is because we were told not to.
donatien	0:b802fc31f1db	977	* For the authentication type, the Nak from the peer means
donatien	0:b802fc31f1db	978	* `let me authenticate myself with you' which is a bit pointless.
donatien	0:b802fc31f1db	979	* For the quality protocol, the Nak means `ask me to send you quality
donatien	0:b802fc31f1db	980	* reports', but if we didn't ask for them, we don't want them.
donatien	0:b802fc31f1db	981	* An option we don't recognize represents the peer asking to
donatien	0:b802fc31f1db	982	* negotiate some option we don't support, so ignore it.
donatien	0:b802fc31f1db	983	*/
donatien	0:b802fc31f1db	984	while (len > CILEN_VOID) {
donatien	0:b802fc31f1db	985	GETCHAR(citype, p);
donatien	0:b802fc31f1db	986	GETCHAR(cilen, p);
donatien	0:b802fc31f1db	987	if (cilen < CILEN_VOID \|\| (len -= cilen) < 0) {
donatien	0:b802fc31f1db	988	goto bad;
donatien	0:b802fc31f1db	989	}
donatien	0:b802fc31f1db	990	next = p + cilen - 2;
donatien	0:b802fc31f1db	991
donatien	0:b802fc31f1db	992	switch (citype) {
donatien	0:b802fc31f1db	993	case CI_MRU:
donatien	0:b802fc31f1db	994	if ((go->neg_mru && go->mru != PPP_DEFMRU)
donatien	0:b802fc31f1db	995	\|\| no.neg_mru \|\| cilen != CILEN_SHORT) {
donatien	0:b802fc31f1db	996	goto bad;
donatien	0:b802fc31f1db	997	}
donatien	0:b802fc31f1db	998	GETSHORT(cishort, p);
donatien	0:b802fc31f1db	999	if (cishort < PPP_DEFMRU) {
donatien	0:b802fc31f1db	1000	try.mru = cishort;
donatien	0:b802fc31f1db	1001	}
donatien	0:b802fc31f1db	1002	break;
donatien	0:b802fc31f1db	1003	case CI_ASYNCMAP:
donatien	0:b802fc31f1db	1004	if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl)
donatien	0:b802fc31f1db	1005	\|\| no.neg_asyncmap \|\| cilen != CILEN_LONG) {
donatien	0:b802fc31f1db	1006	goto bad;
donatien	0:b802fc31f1db	1007	}
donatien	0:b802fc31f1db	1008	break;
donatien	0:b802fc31f1db	1009	case CI_AUTHTYPE:
donatien	0:b802fc31f1db	1010	if (go->neg_chap \|\| no.neg_chap \|\| go->neg_upap \|\| no.neg_upap) {
donatien	0:b802fc31f1db	1011	goto bad;
donatien	0:b802fc31f1db	1012	}
donatien	0:b802fc31f1db	1013	break;
donatien	0:b802fc31f1db	1014	case CI_MAGICNUMBER:
donatien	0:b802fc31f1db	1015	if (go->neg_magicnumber \|\| no.neg_magicnumber \|\|
donatien	0:b802fc31f1db	1016	cilen != CILEN_LONG) {
donatien	0:b802fc31f1db	1017	goto bad;
donatien	0:b802fc31f1db	1018	}
donatien	0:b802fc31f1db	1019	break;
donatien	0:b802fc31f1db	1020	case CI_PCOMPRESSION:
donatien	0:b802fc31f1db	1021	if (go->neg_pcompression \|\| no.neg_pcompression
donatien	0:b802fc31f1db	1022	\|\| cilen != CILEN_VOID) {
donatien	0:b802fc31f1db	1023	goto bad;
donatien	0:b802fc31f1db	1024	}
donatien	0:b802fc31f1db	1025	break;
donatien	0:b802fc31f1db	1026	case CI_ACCOMPRESSION:
donatien	0:b802fc31f1db	1027	if (go->neg_accompression \|\| no.neg_accompression
donatien	0:b802fc31f1db	1028	\|\| cilen != CILEN_VOID) {
donatien	0:b802fc31f1db	1029	goto bad;
donatien	0:b802fc31f1db	1030	}
donatien	0:b802fc31f1db	1031	break;
donatien	0:b802fc31f1db	1032	case CI_QUALITY:
donatien	0:b802fc31f1db	1033	if (go->neg_lqr \|\| no.neg_lqr \|\| cilen != CILEN_LQR) {
donatien	0:b802fc31f1db	1034	goto bad;
donatien	0:b802fc31f1db	1035	}
donatien	0:b802fc31f1db	1036	break;
donatien	0:b802fc31f1db	1037	}
donatien	0:b802fc31f1db	1038	p = next;
donatien	0:b802fc31f1db	1039	}
donatien	0:b802fc31f1db	1040
donatien	0:b802fc31f1db	1041	/* If there is still anything left, this packet is bad. */
donatien	0:b802fc31f1db	1042	if (len != 0) {
donatien	0:b802fc31f1db	1043	goto bad;
donatien	0:b802fc31f1db	1044	}
donatien	0:b802fc31f1db	1045
donatien	0:b802fc31f1db	1046	/*
donatien	0:b802fc31f1db	1047	* OK, the Nak is good. Now we can update state.
donatien	0:b802fc31f1db	1048	*/
donatien	0:b802fc31f1db	1049	if (f->state != LS_OPENED) {
donatien	0:b802fc31f1db	1050	if (looped_back) {
donatien	0:b802fc31f1db	1051	if (++try.numloops >= lcp_loopbackfail) {
donatien	0:b802fc31f1db	1052	LCPDEBUG(LOG_NOTICE, ("Serial line is looped back.\n"));
donatien	0:b802fc31f1db	1053	lcp_close(f->unit, "Loopback detected");
donatien	0:b802fc31f1db	1054	}
donatien	0:b802fc31f1db	1055	} else {
donatien	0:b802fc31f1db	1056	try.numloops = 0;
donatien	0:b802fc31f1db	1057	}
donatien	0:b802fc31f1db	1058	*go = try;
donatien	0:b802fc31f1db	1059	}
donatien	0:b802fc31f1db	1060
donatien	0:b802fc31f1db	1061	return 1;
donatien	0:b802fc31f1db	1062
donatien	0:b802fc31f1db	1063	bad:
donatien	0:b802fc31f1db	1064	LCPDEBUG(LOG_WARNING, ("lcp_nakci: received bad Nak!\n"));
donatien	0:b802fc31f1db	1065	return 0;
donatien	0:b802fc31f1db	1066	}
donatien	0:b802fc31f1db	1067
donatien	0:b802fc31f1db	1068
donatien	0:b802fc31f1db	1069	/*
donatien	0:b802fc31f1db	1070	* lcp_rejci - Peer has Rejected some of our CIs.
donatien	0:b802fc31f1db	1071	* This should not modify any state if the Reject is bad
donatien	0:b802fc31f1db	1072	* or if LCP is in the LS_OPENED state.
donatien	0:b802fc31f1db	1073	*
donatien	0:b802fc31f1db	1074	* Returns:
donatien	0:b802fc31f1db	1075	* 0 - Reject was bad.
donatien	0:b802fc31f1db	1076	* 1 - Reject was good.
donatien	0:b802fc31f1db	1077	*/
donatien	0:b802fc31f1db	1078	static int
donatien	0:b802fc31f1db	1079	lcp_rejci(fsm f, u_char p, int len)
donatien	0:b802fc31f1db	1080	{
donatien	0:b802fc31f1db	1081	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:b802fc31f1db	1082	u_char cichar;
donatien	0:b802fc31f1db	1083	u_short cishort;
donatien	0:b802fc31f1db	1084	u32_t cilong;
donatien	0:b802fc31f1db	1085	lcp_options try; /* options to request next time */
donatien	0:b802fc31f1db	1086
donatien	0:b802fc31f1db	1087	try = *go;
donatien	0:b802fc31f1db	1088
donatien	0:b802fc31f1db	1089	/*
donatien	0:b802fc31f1db	1090	* Any Rejected CIs must be in exactly the same order that we sent.
donatien	0:b802fc31f1db	1091	* Check packet length and CI length at each step.
donatien	0:b802fc31f1db	1092	* If we find any deviations, then this packet is bad.
donatien	0:b802fc31f1db	1093	*/
donatien	0:b802fc31f1db	1094	#define REJCIVOID(opt, neg) \
donatien	0:b802fc31f1db	1095	if (go->neg && \
donatien	0:b802fc31f1db	1096	len >= CILEN_VOID && \
donatien	0:b802fc31f1db	1097	p[1] == CILEN_VOID && \
donatien	0:b802fc31f1db	1098	p[0] == opt) { \
donatien	0:b802fc31f1db	1099	len -= CILEN_VOID; \
donatien	0:b802fc31f1db	1100	INCPTR(CILEN_VOID, p); \
donatien	0:b802fc31f1db	1101	try.neg = 0; \
donatien	0:b802fc31f1db	1102	LCPDEBUG(LOG_INFO, ("lcp_rejci: void opt %d rejected\n", opt)); \
donatien	0:b802fc31f1db	1103	}
donatien	0:b802fc31f1db	1104	#define REJCISHORT(opt, neg, val) \
donatien	0:b802fc31f1db	1105	if (go->neg && \
donatien	0:b802fc31f1db	1106	len >= CILEN_SHORT && \
donatien	0:b802fc31f1db	1107	p[1] == CILEN_SHORT && \
donatien	0:b802fc31f1db	1108	p[0] == opt) { \
donatien	0:b802fc31f1db	1109	len -= CILEN_SHORT; \
donatien	0:b802fc31f1db	1110	INCPTR(2, p); \
donatien	0:b802fc31f1db	1111	GETSHORT(cishort, p); \
donatien	0:b802fc31f1db	1112	/* Check rejected value. */ \
donatien	0:b802fc31f1db	1113	if (cishort != val) { \
donatien	0:b802fc31f1db	1114	goto bad; \
donatien	0:b802fc31f1db	1115	} \
donatien	0:b802fc31f1db	1116	try.neg = 0; \
donatien	0:b802fc31f1db	1117	LCPDEBUG(LOG_INFO, ("lcp_rejci: short opt %d rejected\n", opt)); \
donatien	0:b802fc31f1db	1118	}
donatien	0:b802fc31f1db	1119	#define REJCICHAP(opt, neg, val, digest) \
donatien	0:b802fc31f1db	1120	if (go->neg && \
donatien	0:b802fc31f1db	1121	len >= CILEN_CHAP && \
donatien	0:b802fc31f1db	1122	p[1] == CILEN_CHAP && \
donatien	0:b802fc31f1db	1123	p[0] == opt) { \
donatien	0:b802fc31f1db	1124	len -= CILEN_CHAP; \
donatien	0:b802fc31f1db	1125	INCPTR(2, p); \
donatien	0:b802fc31f1db	1126	GETSHORT(cishort, p); \
donatien	0:b802fc31f1db	1127	GETCHAR(cichar, p); \
donatien	0:b802fc31f1db	1128	/* Check rejected value. */ \
donatien	0:b802fc31f1db	1129	if (cishort != val \|\| cichar != digest) { \
donatien	0:b802fc31f1db	1130	goto bad; \
donatien	0:b802fc31f1db	1131	} \
donatien	0:b802fc31f1db	1132	try.neg = 0; \
donatien	0:b802fc31f1db	1133	try.neg_upap = 0; \
donatien	0:b802fc31f1db	1134	LCPDEBUG(LOG_INFO, ("lcp_rejci: chap opt %d rejected\n", opt)); \
donatien	0:b802fc31f1db	1135	}
donatien	0:b802fc31f1db	1136	#define REJCILONG(opt, neg, val) \
donatien	0:b802fc31f1db	1137	if (go->neg && \
donatien	0:b802fc31f1db	1138	len >= CILEN_LONG && \
donatien	0:b802fc31f1db	1139	p[1] == CILEN_LONG && \
donatien	0:b802fc31f1db	1140	p[0] == opt) { \
donatien	0:b802fc31f1db	1141	len -= CILEN_LONG; \
donatien	0:b802fc31f1db	1142	INCPTR(2, p); \
donatien	0:b802fc31f1db	1143	GETLONG(cilong, p); \
donatien	0:b802fc31f1db	1144	/* Check rejected value. */ \
donatien	0:b802fc31f1db	1145	if (cilong != val) { \
donatien	0:b802fc31f1db	1146	goto bad; \
donatien	0:b802fc31f1db	1147	} \
donatien	0:b802fc31f1db	1148	try.neg = 0; \
donatien	0:b802fc31f1db	1149	LCPDEBUG(LOG_INFO, ("lcp_rejci: long opt %d rejected\n", opt)); \
donatien	0:b802fc31f1db	1150	}
donatien	0:b802fc31f1db	1151	#define REJCILQR(opt, neg, val) \
donatien	0:b802fc31f1db	1152	if (go->neg && \
donatien	0:b802fc31f1db	1153	len >= CILEN_LQR && \
donatien	0:b802fc31f1db	1154	p[1] == CILEN_LQR && \
donatien	0:b802fc31f1db	1155	p[0] == opt) { \
donatien	0:b802fc31f1db	1156	len -= CILEN_LQR; \
donatien	0:b802fc31f1db	1157	INCPTR(2, p); \
donatien	0:b802fc31f1db	1158	GETSHORT(cishort, p); \
donatien	0:b802fc31f1db	1159	GETLONG(cilong, p); \
donatien	0:b802fc31f1db	1160	/* Check rejected value. */ \
donatien	0:b802fc31f1db	1161	if (cishort != PPP_LQR \|\| cilong != val) { \
donatien	0:b802fc31f1db	1162	goto bad; \
donatien	0:b802fc31f1db	1163	} \
donatien	0:b802fc31f1db	1164	try.neg = 0; \
donatien	0:b802fc31f1db	1165	LCPDEBUG(LOG_INFO, ("lcp_rejci: LQR opt %d rejected\n", opt)); \
donatien	0:b802fc31f1db	1166	}
donatien	0:b802fc31f1db	1167	#define REJCICBCP(opt, neg, val) \
donatien	0:b802fc31f1db	1168	if (go->neg && \
donatien	0:b802fc31f1db	1169	len >= CILEN_CBCP && \
donatien	0:b802fc31f1db	1170	p[1] == CILEN_CBCP && \
donatien	0:b802fc31f1db	1171	p[0] == opt) { \
donatien	0:b802fc31f1db	1172	len -= CILEN_CBCP; \
donatien	0:b802fc31f1db	1173	INCPTR(2, p); \
donatien	0:b802fc31f1db	1174	GETCHAR(cichar, p); \
donatien	0:b802fc31f1db	1175	/* Check rejected value. */ \
donatien	0:b802fc31f1db	1176	if (cichar != val) { \
donatien	0:b802fc31f1db	1177	goto bad; \
donatien	0:b802fc31f1db	1178	} \
donatien	0:b802fc31f1db	1179	try.neg = 0; \
donatien	0:b802fc31f1db	1180	LCPDEBUG(LOG_INFO, ("lcp_rejci: Callback opt %d rejected\n", opt)); \
donatien	0:b802fc31f1db	1181	}
donatien	0:b802fc31f1db	1182
donatien	0:b802fc31f1db	1183	REJCISHORT(CI_MRU, neg_mru, go->mru);
donatien	0:b802fc31f1db	1184	REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap);
donatien	0:b802fc31f1db	1185	REJCICHAP(CI_AUTHTYPE, neg_chap, PPP_CHAP, go->chap_mdtype);
donatien	0:b802fc31f1db	1186	if (!go->neg_chap) {
donatien	0:b802fc31f1db	1187	REJCISHORT(CI_AUTHTYPE, neg_upap, PPP_PAP);
donatien	0:b802fc31f1db	1188	}
donatien	0:b802fc31f1db	1189	REJCILQR(CI_QUALITY, neg_lqr, go->lqr_period);
donatien	0:b802fc31f1db	1190	REJCICBCP(CI_CALLBACK, neg_cbcp, CBCP_OPT);
donatien	0:b802fc31f1db	1191	REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber);
donatien	0:b802fc31f1db	1192	REJCIVOID(CI_PCOMPRESSION, neg_pcompression);
donatien	0:b802fc31f1db	1193	REJCIVOID(CI_ACCOMPRESSION, neg_accompression);
donatien	0:b802fc31f1db	1194
donatien	0:b802fc31f1db	1195	/*
donatien	0:b802fc31f1db	1196	* If there are any remaining CIs, then this packet is bad.
donatien	0:b802fc31f1db	1197	*/
donatien	0:b802fc31f1db	1198	if (len != 0) {
donatien	0:b802fc31f1db	1199	goto bad;
donatien	0:b802fc31f1db	1200	}
donatien	0:b802fc31f1db	1201	/*
donatien	0:b802fc31f1db	1202	* Now we can update state.
donatien	0:b802fc31f1db	1203	*/
donatien	0:b802fc31f1db	1204	if (f->state != LS_OPENED) {
donatien	0:b802fc31f1db	1205	*go = try;
donatien	0:b802fc31f1db	1206	}
donatien	0:b802fc31f1db	1207	return 1;
donatien	0:b802fc31f1db	1208
donatien	0:b802fc31f1db	1209	bad:
donatien	0:b802fc31f1db	1210	LCPDEBUG(LOG_WARNING, ("lcp_rejci: received bad Reject!\n"));
donatien	0:b802fc31f1db	1211	return 0;
donatien	0:b802fc31f1db	1212	}
donatien	0:b802fc31f1db	1213
donatien	0:b802fc31f1db	1214
donatien	0:b802fc31f1db	1215	/*
donatien	0:b802fc31f1db	1216	* lcp_reqci - Check the peer's requested CIs and send appropriate response.
donatien	0:b802fc31f1db	1217	*
donatien	0:b802fc31f1db	1218	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
donatien	0:b802fc31f1db	1219	* appropriately. If reject_if_disagree is non-zero, doesn't return
donatien	0:b802fc31f1db	1220	* CONFNAK; returns CONFREJ if it can't return CONFACK.
donatien	0:b802fc31f1db	1221	*/
donatien	0:b802fc31f1db	1222	static int
donatien	0:b802fc31f1db	1223	lcp_reqci(fsm *f,
donatien	0:b802fc31f1db	1224	u_char inp, / Requested CIs */
donatien	0:b802fc31f1db	1225	int lenp, / Length of requested CIs */
donatien	0:b802fc31f1db	1226	int reject_if_disagree)
donatien	0:b802fc31f1db	1227	{
donatien	0:b802fc31f1db	1228	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:b802fc31f1db	1229	lcp_options *ho = &lcp_hisoptions[f->unit];
donatien	0:b802fc31f1db	1230	lcp_options *ao = &lcp_allowoptions[f->unit];
donatien	0:b802fc31f1db	1231	u_char cip, next; /* Pointer to current and next CIs */
donatien	0:b802fc31f1db	1232	int cilen, citype; /* Parsed len, type */
donatien	0:b802fc31f1db	1233	u_char cichar; /* Parsed char value */
donatien	0:b802fc31f1db	1234	u_short cishort; /* Parsed short value */
donatien	0:b802fc31f1db	1235	u32_t cilong; /* Parse long value */
donatien	0:b802fc31f1db	1236	int rc = CONFACK; /* Final packet return code */
donatien	0:b802fc31f1db	1237	int orc; /* Individual option return code */
donatien	0:b802fc31f1db	1238	u_char p; / Pointer to next char to parse */
donatien	0:b802fc31f1db	1239	u_char rejp; / Pointer to next char in reject frame */
donatien	0:b802fc31f1db	1240	u_char nakp; / Pointer to next char in Nak frame */
donatien	0:b802fc31f1db	1241	int l = lenp; / Length left */
donatien	0:b802fc31f1db	1242	#if TRACELCP > 0
donatien	0:b802fc31f1db	1243	char traceBuf[80];
donatien	0:b802fc31f1db	1244	size_t traceNdx = 0;
donatien	0:b802fc31f1db	1245	#endif
donatien	0:b802fc31f1db	1246
donatien	0:b802fc31f1db	1247	/*
donatien	0:b802fc31f1db	1248	* Reset all his options.
donatien	0:b802fc31f1db	1249	*/
donatien	0:b802fc31f1db	1250	BZERO(ho, sizeof(*ho));
donatien	0:b802fc31f1db	1251
donatien	0:b802fc31f1db	1252	/*
donatien	0:b802fc31f1db	1253	* Process all his options.
donatien	0:b802fc31f1db	1254	*/
donatien	0:b802fc31f1db	1255	next = inp;
donatien	0:b802fc31f1db	1256	nakp = nak_buffer;
donatien	0:b802fc31f1db	1257	rejp = inp;
donatien	0:b802fc31f1db	1258	while (l) {
donatien	0:b802fc31f1db	1259	orc = CONFACK; /* Assume success */
donatien	0:b802fc31f1db	1260	cip = p = next; /* Remember begining of CI */
donatien	0:b802fc31f1db	1261	if (l < 2 \|\| /* Not enough data for CI header or */
donatien	0:b802fc31f1db	1262	p[1] < 2 \|\| /* CI length too small or */
donatien	0:b802fc31f1db	1263	p[1] > l) { /* CI length too big? */
donatien	0:b802fc31f1db	1264	LCPDEBUG(LOG_WARNING, ("lcp_reqci: bad CI length!\n"));
donatien	0:b802fc31f1db	1265	orc = CONFREJ; /* Reject bad CI */
donatien	0:b802fc31f1db	1266	cilen = l; /* Reject till end of packet */
donatien	0:b802fc31f1db	1267	l = 0; /* Don't loop again */
donatien	0:b802fc31f1db	1268	citype = 0;
donatien	0:b802fc31f1db	1269	goto endswitch;
donatien	0:b802fc31f1db	1270	}
donatien	0:b802fc31f1db	1271	GETCHAR(citype, p); /* Parse CI type */
donatien	0:b802fc31f1db	1272	GETCHAR(cilen, p); /* Parse CI length */
donatien	0:b802fc31f1db	1273	l -= cilen; /* Adjust remaining length */
donatien	0:b802fc31f1db	1274	next += cilen; /* Step to next CI */
donatien	0:b802fc31f1db	1275
donatien	0:b802fc31f1db	1276	switch (citype) { /* Check CI type */
donatien	0:b802fc31f1db	1277	case CI_MRU:
donatien	0:b802fc31f1db	1278	if (!ao->neg_mru) { /* Allow option? */
donatien	0:b802fc31f1db	1279	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - not allowed\n"));
donatien	0:b802fc31f1db	1280	orc = CONFREJ; /* Reject CI */
donatien	0:b802fc31f1db	1281	break;
donatien	0:b802fc31f1db	1282	} else if (cilen != CILEN_SHORT) { /* Check CI length */
donatien	0:b802fc31f1db	1283	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - bad length\n"));
donatien	0:b802fc31f1db	1284	orc = CONFREJ; /* Reject CI */
donatien	0:b802fc31f1db	1285	break;
donatien	0:b802fc31f1db	1286	}
donatien	0:b802fc31f1db	1287	GETSHORT(cishort, p); /* Parse MRU */
donatien	0:b802fc31f1db	1288
donatien	0:b802fc31f1db	1289	/*
donatien	0:b802fc31f1db	1290	* He must be able to receive at least our minimum.
donatien	0:b802fc31f1db	1291	* No need to check a maximum. If he sends a large number,
donatien	0:b802fc31f1db	1292	* we'll just ignore it.
donatien	0:b802fc31f1db	1293	*/
donatien	0:b802fc31f1db	1294	if (cishort < PPP_MINMRU) {
donatien	0:b802fc31f1db	1295	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak - MRU too small\n"));
donatien	0:b802fc31f1db	1296	orc = CONFNAK; /* Nak CI */
donatien	0:b802fc31f1db	1297	PUTCHAR(CI_MRU, nakp);
donatien	0:b802fc31f1db	1298	PUTCHAR(CILEN_SHORT, nakp);
donatien	0:b802fc31f1db	1299	PUTSHORT(PPP_MINMRU, nakp); /* Give him a hint */
donatien	0:b802fc31f1db	1300	break;
donatien	0:b802fc31f1db	1301	}
donatien	0:b802fc31f1db	1302	ho->neg_mru = 1; /* Remember he sent MRU */
donatien	0:b802fc31f1db	1303	ho->mru = cishort; /* And remember value */
donatien	0:b802fc31f1db	1304	#if TRACELCP > 0
donatien	0:b802fc31f1db	1305	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MRU %d", cishort);
donatien	0:b802fc31f1db	1306	traceNdx = strlen(traceBuf);
donatien	0:b802fc31f1db	1307	#endif
donatien	0:b802fc31f1db	1308	break;
donatien	0:b802fc31f1db	1309
donatien	0:b802fc31f1db	1310	case CI_ASYNCMAP:
donatien	0:b802fc31f1db	1311	if (!ao->neg_asyncmap) {
donatien	0:b802fc31f1db	1312	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP not allowed\n"));
donatien	0:b802fc31f1db	1313	orc = CONFREJ;
donatien	0:b802fc31f1db	1314	break;
donatien	0:b802fc31f1db	1315	} else if (cilen != CILEN_LONG) {
donatien	0:b802fc31f1db	1316	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP bad length\n"));
donatien	0:b802fc31f1db	1317	orc = CONFREJ;
donatien	0:b802fc31f1db	1318	break;
donatien	0:b802fc31f1db	1319	}
donatien	0:b802fc31f1db	1320	GETLONG(cilong, p);
donatien	0:b802fc31f1db	1321
donatien	0:b802fc31f1db	1322	/*
donatien	0:b802fc31f1db	1323	* Asyncmap must have set at least the bits
donatien	0:b802fc31f1db	1324	* which are set in lcp_allowoptions[unit].asyncmap.
donatien	0:b802fc31f1db	1325	*/
donatien	0:b802fc31f1db	1326	if ((ao->asyncmap & ~cilong) != 0) {
donatien	0:b802fc31f1db	1327	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak ASYNCMAP %lX missing %lX\n",
donatien	0:b802fc31f1db	1328	cilong, ao->asyncmap));
donatien	0:b802fc31f1db	1329	orc = CONFNAK;
donatien	0:b802fc31f1db	1330	PUTCHAR(CI_ASYNCMAP, nakp);
donatien	0:b802fc31f1db	1331	PUTCHAR(CILEN_LONG, nakp);
donatien	0:b802fc31f1db	1332	PUTLONG(ao->asyncmap \| cilong, nakp);
donatien	0:b802fc31f1db	1333	break;
donatien	0:b802fc31f1db	1334	}
donatien	0:b802fc31f1db	1335	ho->neg_asyncmap = 1;
donatien	0:b802fc31f1db	1336	ho->asyncmap = cilong;
donatien	0:b802fc31f1db	1337	#if TRACELCP > 0
donatien	0:b802fc31f1db	1338	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ASYNCMAP=%lX", cilong);
donatien	0:b802fc31f1db	1339	traceNdx = strlen(traceBuf);
donatien	0:b802fc31f1db	1340	#endif
donatien	0:b802fc31f1db	1341	break;
donatien	0:b802fc31f1db	1342
donatien	0:b802fc31f1db	1343	case CI_AUTHTYPE:
donatien	0:b802fc31f1db	1344	if (cilen < CILEN_SHORT) {
donatien	0:b802fc31f1db	1345	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE missing arg\n"));
donatien	0:b802fc31f1db	1346	orc = CONFREJ;
donatien	0:b802fc31f1db	1347	break;
donatien	0:b802fc31f1db	1348	} else if (!(ao->neg_upap \|\| ao->neg_chap)) {
donatien	0:b802fc31f1db	1349	/*
donatien	0:b802fc31f1db	1350	* Reject the option if we're not willing to authenticate.
donatien	0:b802fc31f1db	1351	*/
donatien	0:b802fc31f1db	1352	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE not allowed\n"));
donatien	0:b802fc31f1db	1353	orc = CONFREJ;
donatien	0:b802fc31f1db	1354	break;
donatien	0:b802fc31f1db	1355	}
donatien	0:b802fc31f1db	1356	GETSHORT(cishort, p);
donatien	0:b802fc31f1db	1357
donatien	0:b802fc31f1db	1358	/*
donatien	0:b802fc31f1db	1359	* Authtype must be UPAP or CHAP.
donatien	0:b802fc31f1db	1360	*
donatien	0:b802fc31f1db	1361	* Note: if both ao->neg_upap and ao->neg_chap are set,
donatien	0:b802fc31f1db	1362	* and the peer sends a Configure-Request with two
donatien	0:b802fc31f1db	1363	* authenticate-protocol requests, one for CHAP and one
donatien	0:b802fc31f1db	1364	* for UPAP, then we will reject the second request.
donatien	0:b802fc31f1db	1365	* Whether we end up doing CHAP or UPAP depends then on
donatien	0:b802fc31f1db	1366	* the ordering of the CIs in the peer's Configure-Request.
donatien	0:b802fc31f1db	1367	*/
donatien	0:b802fc31f1db	1368
donatien	0:b802fc31f1db	1369	if (cishort == PPP_PAP) {
donatien	0:b802fc31f1db	1370	if (ho->neg_chap) { /* we've already accepted CHAP */
donatien	0:b802fc31f1db	1371	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP already accepted\n"));
donatien	0:b802fc31f1db	1372	orc = CONFREJ;
donatien	0:b802fc31f1db	1373	break;
donatien	0:b802fc31f1db	1374	} else if (cilen != CILEN_SHORT) {
donatien	0:b802fc31f1db	1375	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP bad len\n"));
donatien	0:b802fc31f1db	1376	orc = CONFREJ;
donatien	0:b802fc31f1db	1377	break;
donatien	0:b802fc31f1db	1378	}
donatien	0:b802fc31f1db	1379	if (!ao->neg_upap) { /* we don't want to do PAP */
donatien	0:b802fc31f1db	1380	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE PAP not allowed\n"));
donatien	0:b802fc31f1db	1381	orc = CONFNAK; /* NAK it and suggest CHAP */
donatien	0:b802fc31f1db	1382	PUTCHAR(CI_AUTHTYPE, nakp);
donatien	0:b802fc31f1db	1383	PUTCHAR(CILEN_CHAP, nakp);
donatien	0:b802fc31f1db	1384	PUTSHORT(PPP_CHAP, nakp);
donatien	0:b802fc31f1db	1385	PUTCHAR(ao->chap_mdtype, nakp);
donatien	0:b802fc31f1db	1386	break;
donatien	0:b802fc31f1db	1387	}
donatien	0:b802fc31f1db	1388	ho->neg_upap = 1;
donatien	0:b802fc31f1db	1389	#if TRACELCP > 0
donatien	0:b802fc31f1db	1390	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PAP (%X)", cishort);
donatien	0:b802fc31f1db	1391	traceNdx = strlen(traceBuf);
donatien	0:b802fc31f1db	1392	#endif
donatien	0:b802fc31f1db	1393	break;
donatien	0:b802fc31f1db	1394	}
donatien	0:b802fc31f1db	1395	if (cishort == PPP_CHAP) {
donatien	0:b802fc31f1db	1396	if (ho->neg_upap) { /* we've already accepted PAP */
donatien	0:b802fc31f1db	1397	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP accepted PAP\n"));
donatien	0:b802fc31f1db	1398	orc = CONFREJ;
donatien	0:b802fc31f1db	1399	break;
donatien	0:b802fc31f1db	1400	} else if (cilen != CILEN_CHAP) {
donatien	0:b802fc31f1db	1401	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP bad len\n"));
donatien	0:b802fc31f1db	1402	orc = CONFREJ;
donatien	0:b802fc31f1db	1403	break;
donatien	0:b802fc31f1db	1404	}
donatien	0:b802fc31f1db	1405	if (!ao->neg_chap) { /* we don't want to do CHAP */
donatien	0:b802fc31f1db	1406	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP not allowed\n"));
donatien	0:b802fc31f1db	1407	orc = CONFNAK; /* NAK it and suggest PAP */
donatien	0:b802fc31f1db	1408	PUTCHAR(CI_AUTHTYPE, nakp);
donatien	0:b802fc31f1db	1409	PUTCHAR(CILEN_SHORT, nakp);
donatien	0:b802fc31f1db	1410	PUTSHORT(PPP_PAP, nakp);
donatien	0:b802fc31f1db	1411	break;
donatien	0:b802fc31f1db	1412	}
donatien	0:b802fc31f1db	1413	GETCHAR(cichar, p); /* get digest type*/
donatien	0:b802fc31f1db	1414	if (cichar != CHAP_DIGEST_MD5
donatien	0:b802fc31f1db	1415	#if MSCHAP_SUPPORT
donatien	0:b802fc31f1db	1416	&& cichar != CHAP_MICROSOFT
donatien	0:b802fc31f1db	1417	#endif
donatien	0:b802fc31f1db	1418	) {
donatien	0:b802fc31f1db	1419	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP digest=%d\n", (int)cichar));
donatien	0:b802fc31f1db	1420	orc = CONFNAK;
donatien	0:b802fc31f1db	1421	PUTCHAR(CI_AUTHTYPE, nakp);
donatien	0:b802fc31f1db	1422	PUTCHAR(CILEN_CHAP, nakp);
donatien	0:b802fc31f1db	1423	PUTSHORT(PPP_CHAP, nakp);
donatien	0:b802fc31f1db	1424	PUTCHAR(ao->chap_mdtype, nakp);
donatien	0:b802fc31f1db	1425	break;
donatien	0:b802fc31f1db	1426	}
donatien	0:b802fc31f1db	1427	#if TRACELCP > 0
donatien	0:b802fc31f1db	1428	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CHAP %X,%d", cishort, (int)cichar);
donatien	0:b802fc31f1db	1429	traceNdx = strlen(traceBuf);
donatien	0:b802fc31f1db	1430	#endif
donatien	0:b802fc31f1db	1431	ho->chap_mdtype = cichar; /* save md type */
donatien	0:b802fc31f1db	1432	ho->neg_chap = 1;
donatien	0:b802fc31f1db	1433	break;
donatien	0:b802fc31f1db	1434	}
donatien	0:b802fc31f1db	1435
donatien	0:b802fc31f1db	1436	/*
donatien	0:b802fc31f1db	1437	* We don't recognize the protocol they're asking for.
donatien	0:b802fc31f1db	1438	* Nak it with something we're willing to do.
donatien	0:b802fc31f1db	1439	* (At this point we know ao->neg_upap \|\| ao->neg_chap.)
donatien	0:b802fc31f1db	1440	*/
donatien	0:b802fc31f1db	1441	orc = CONFNAK;
donatien	0:b802fc31f1db	1442	PUTCHAR(CI_AUTHTYPE, nakp);
donatien	0:b802fc31f1db	1443	if (ao->neg_chap) {
donatien	0:b802fc31f1db	1444	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req CHAP\n", cishort));
donatien	0:b802fc31f1db	1445	PUTCHAR(CILEN_CHAP, nakp);
donatien	0:b802fc31f1db	1446	PUTSHORT(PPP_CHAP, nakp);
donatien	0:b802fc31f1db	1447	PUTCHAR(ao->chap_mdtype, nakp);
donatien	0:b802fc31f1db	1448	} else {
donatien	0:b802fc31f1db	1449	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req PAP\n", cishort));
donatien	0:b802fc31f1db	1450	PUTCHAR(CILEN_SHORT, nakp);
donatien	0:b802fc31f1db	1451	PUTSHORT(PPP_PAP, nakp);
donatien	0:b802fc31f1db	1452	}
donatien	0:b802fc31f1db	1453	break;
donatien	0:b802fc31f1db	1454
donatien	0:b802fc31f1db	1455	case CI_QUALITY:
donatien	0:b802fc31f1db	1456	GETSHORT(cishort, p);
donatien	0:b802fc31f1db	1457	GETLONG(cilong, p);
donatien	0:b802fc31f1db	1458	#if TRACELCP > 0
donatien	0:b802fc31f1db	1459	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " QUALITY (%x %x)", cishort, (unsigned int) cilong);
donatien	0:b802fc31f1db	1460	traceNdx = strlen(traceBuf);
donatien	0:b802fc31f1db	1461	#endif
donatien	0:b802fc31f1db	1462
donatien	0:b802fc31f1db	1463	if (!ao->neg_lqr \|\|
donatien	0:b802fc31f1db	1464	cilen != CILEN_LQR) {
donatien	0:b802fc31f1db	1465	orc = CONFREJ;
donatien	0:b802fc31f1db	1466	break;
donatien	0:b802fc31f1db	1467	}
donatien	0:b802fc31f1db	1468
donatien	0:b802fc31f1db	1469	/*
donatien	0:b802fc31f1db	1470	* Check the protocol and the reporting period.
donatien	0:b802fc31f1db	1471	* XXX When should we Nak this, and what with?
donatien	0:b802fc31f1db	1472	*/
donatien	0:b802fc31f1db	1473	if (cishort != PPP_LQR) {
donatien	0:b802fc31f1db	1474	orc = CONFNAK;
donatien	0:b802fc31f1db	1475	PUTCHAR(CI_QUALITY, nakp);
donatien	0:b802fc31f1db	1476	PUTCHAR(CILEN_LQR, nakp);
donatien	0:b802fc31f1db	1477	PUTSHORT(PPP_LQR, nakp);
donatien	0:b802fc31f1db	1478	PUTLONG(ao->lqr_period, nakp);
donatien	0:b802fc31f1db	1479	break;
donatien	0:b802fc31f1db	1480	}
donatien	0:b802fc31f1db	1481	break;
donatien	0:b802fc31f1db	1482
donatien	0:b802fc31f1db	1483	case CI_MAGICNUMBER:
donatien	0:b802fc31f1db	1484	if (!(ao->neg_magicnumber \|\| go->neg_magicnumber) \|\|
donatien	0:b802fc31f1db	1485	cilen != CILEN_LONG) {
donatien	0:b802fc31f1db	1486	orc = CONFREJ;
donatien	0:b802fc31f1db	1487	break;
donatien	0:b802fc31f1db	1488	}
donatien	0:b802fc31f1db	1489	GETLONG(cilong, p);
donatien	0:b802fc31f1db	1490	#if TRACELCP > 0
donatien	0:b802fc31f1db	1491	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MAGICNUMBER (%lX)", cilong);
donatien	0:b802fc31f1db	1492	traceNdx = strlen(traceBuf);
donatien	0:b802fc31f1db	1493	#endif
donatien	0:b802fc31f1db	1494
donatien	0:b802fc31f1db	1495	/*
donatien	0:b802fc31f1db	1496	* He must have a different magic number.
donatien	0:b802fc31f1db	1497	*/
donatien	0:b802fc31f1db	1498	if (go->neg_magicnumber &&
donatien	0:b802fc31f1db	1499	cilong == go->magicnumber) {
donatien	0:b802fc31f1db	1500	cilong = magic(); /* Don't put magic() inside macro! */
donatien	0:b802fc31f1db	1501	orc = CONFNAK;
donatien	0:b802fc31f1db	1502	PUTCHAR(CI_MAGICNUMBER, nakp);
donatien	0:b802fc31f1db	1503	PUTCHAR(CILEN_LONG, nakp);
donatien	0:b802fc31f1db	1504	PUTLONG(cilong, nakp);
donatien	0:b802fc31f1db	1505	break;
donatien	0:b802fc31f1db	1506	}
donatien	0:b802fc31f1db	1507	ho->neg_magicnumber = 1;
donatien	0:b802fc31f1db	1508	ho->magicnumber = cilong;
donatien	0:b802fc31f1db	1509	break;
donatien	0:b802fc31f1db	1510
donatien	0:b802fc31f1db	1511
donatien	0:b802fc31f1db	1512	case CI_PCOMPRESSION:
donatien	0:b802fc31f1db	1513	#if TRACELCP > 0
donatien	0:b802fc31f1db	1514	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PCOMPRESSION");
donatien	0:b802fc31f1db	1515	traceNdx = strlen(traceBuf);
donatien	0:b802fc31f1db	1516	#endif
donatien	0:b802fc31f1db	1517	if (!ao->neg_pcompression \|\|
donatien	0:b802fc31f1db	1518	cilen != CILEN_VOID) {
donatien	0:b802fc31f1db	1519	orc = CONFREJ;
donatien	0:b802fc31f1db	1520	break;
donatien	0:b802fc31f1db	1521	}
donatien	0:b802fc31f1db	1522	ho->neg_pcompression = 1;
donatien	0:b802fc31f1db	1523	break;
donatien	0:b802fc31f1db	1524
donatien	0:b802fc31f1db	1525	case CI_ACCOMPRESSION:
donatien	0:b802fc31f1db	1526	#if TRACELCP > 0
donatien	0:b802fc31f1db	1527	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ACCOMPRESSION");
donatien	0:b802fc31f1db	1528	traceNdx = strlen(traceBuf);
donatien	0:b802fc31f1db	1529	#endif
donatien	0:b802fc31f1db	1530	if (!ao->neg_accompression \|\|
donatien	0:b802fc31f1db	1531	cilen != CILEN_VOID) {
donatien	0:b802fc31f1db	1532	orc = CONFREJ;
donatien	0:b802fc31f1db	1533	break;
donatien	0:b802fc31f1db	1534	}
donatien	0:b802fc31f1db	1535	ho->neg_accompression = 1;
donatien	0:b802fc31f1db	1536	break;
donatien	0:b802fc31f1db	1537
donatien	0:b802fc31f1db	1538	case CI_MRRU:
donatien	0:b802fc31f1db	1539	#if TRACELCP > 0
donatien	0:b802fc31f1db	1540	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_MRRU");
donatien	0:b802fc31f1db	1541	traceNdx = strlen(traceBuf);
donatien	0:b802fc31f1db	1542	#endif
donatien	0:b802fc31f1db	1543	orc = CONFREJ;
donatien	0:b802fc31f1db	1544	break;
donatien	0:b802fc31f1db	1545
donatien	0:b802fc31f1db	1546	case CI_SSNHF:
donatien	0:b802fc31f1db	1547	#if TRACELCP > 0
donatien	0:b802fc31f1db	1548	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_SSNHF");
donatien	0:b802fc31f1db	1549	traceNdx = strlen(traceBuf);
donatien	0:b802fc31f1db	1550	#endif
donatien	0:b802fc31f1db	1551	orc = CONFREJ;
donatien	0:b802fc31f1db	1552	break;
donatien	0:b802fc31f1db	1553
donatien	0:b802fc31f1db	1554	case CI_EPDISC:
donatien	0:b802fc31f1db	1555	#if TRACELCP > 0
donatien	0:b802fc31f1db	1556	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_EPDISC");
donatien	0:b802fc31f1db	1557	traceNdx = strlen(traceBuf);
donatien	0:b802fc31f1db	1558	#endif
donatien	0:b802fc31f1db	1559	orc = CONFREJ;
donatien	0:b802fc31f1db	1560	break;
donatien	0:b802fc31f1db	1561
donatien	0:b802fc31f1db	1562	default:
donatien	0:b802fc31f1db	1563	#if TRACELCP
donatien	0:b802fc31f1db	1564	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " unknown %d", citype);
donatien	0:b802fc31f1db	1565	traceNdx = strlen(traceBuf);
donatien	0:b802fc31f1db	1566	#endif
donatien	0:b802fc31f1db	1567	orc = CONFREJ;
donatien	0:b802fc31f1db	1568	break;
donatien	0:b802fc31f1db	1569	}
donatien	0:b802fc31f1db	1570
donatien	0:b802fc31f1db	1571	endswitch:
donatien	0:b802fc31f1db	1572	#if TRACELCP
donatien	0:b802fc31f1db	1573	if (traceNdx >= 80 - 32) {
donatien	0:b802fc31f1db	1574	LCPDEBUG(LOG_INFO, ("lcp_reqci: rcvd%s\n", traceBuf));
donatien	0:b802fc31f1db	1575	traceNdx = 0;
donatien	0:b802fc31f1db	1576	}
donatien	0:b802fc31f1db	1577	#endif
donatien	0:b802fc31f1db	1578	if (orc == CONFACK && /* Good CI */
donatien	0:b802fc31f1db	1579	rc != CONFACK) { /* but prior CI wasnt? */
donatien	0:b802fc31f1db	1580	continue; /* Don't send this one */
donatien	0:b802fc31f1db	1581	}
donatien	0:b802fc31f1db	1582
donatien	0:b802fc31f1db	1583	if (orc == CONFNAK) { /* Nak this CI? */
donatien	0:b802fc31f1db	1584	if (reject_if_disagree /* Getting fed up with sending NAKs? */
donatien	0:b802fc31f1db	1585	&& citype != CI_MAGICNUMBER) {
donatien	0:b802fc31f1db	1586	orc = CONFREJ; /* Get tough if so */
donatien	0:b802fc31f1db	1587	} else {
donatien	0:b802fc31f1db	1588	if (rc == CONFREJ) { /* Rejecting prior CI? */
donatien	0:b802fc31f1db	1589	continue; /* Don't send this one */
donatien	0:b802fc31f1db	1590	}
donatien	0:b802fc31f1db	1591	rc = CONFNAK;
donatien	0:b802fc31f1db	1592	}
donatien	0:b802fc31f1db	1593	}
donatien	0:b802fc31f1db	1594	if (orc == CONFREJ) { /* Reject this CI */
donatien	0:b802fc31f1db	1595	rc = CONFREJ;
donatien	0:b802fc31f1db	1596	if (cip != rejp) { /* Need to move rejected CI? */
donatien	0:b802fc31f1db	1597	BCOPY(cip, rejp, cilen); /* Move it */
donatien	0:b802fc31f1db	1598	}
donatien	0:b802fc31f1db	1599	INCPTR(cilen, rejp); /* Update output pointer */
donatien	0:b802fc31f1db	1600	}
donatien	0:b802fc31f1db	1601	}
donatien	0:b802fc31f1db	1602
donatien	0:b802fc31f1db	1603	/*
donatien	0:b802fc31f1db	1604	* If we wanted to send additional NAKs (for unsent CIs), the
donatien	0:b802fc31f1db	1605	* code would go here. The extra NAKs would go at *nakp.
donatien	0:b802fc31f1db	1606	* At present there are no cases where we want to ask the
donatien	0:b802fc31f1db	1607	* peer to negotiate an option.
donatien	0:b802fc31f1db	1608	*/
donatien	0:b802fc31f1db	1609
donatien	0:b802fc31f1db	1610	switch (rc) {
donatien	0:b802fc31f1db	1611	case CONFACK:
donatien	0:b802fc31f1db	1612	*lenp = (int)(next - inp);
donatien	0:b802fc31f1db	1613	break;
donatien	0:b802fc31f1db	1614	case CONFNAK:
donatien	0:b802fc31f1db	1615	/*
donatien	0:b802fc31f1db	1616	* Copy the Nak'd options from the nak_buffer to the caller's buffer.
donatien	0:b802fc31f1db	1617	*/
donatien	0:b802fc31f1db	1618	*lenp = (int)(nakp - nak_buffer);
donatien	0:b802fc31f1db	1619	BCOPY(nak_buffer, inp, *lenp);
donatien	0:b802fc31f1db	1620	break;
donatien	0:b802fc31f1db	1621	case CONFREJ:
donatien	0:b802fc31f1db	1622	*lenp = (int)(rejp - inp);
donatien	0:b802fc31f1db	1623	break;
donatien	0:b802fc31f1db	1624	}
donatien	0:b802fc31f1db	1625
donatien	0:b802fc31f1db	1626	#if TRACELCP > 0
donatien	0:b802fc31f1db	1627	if (traceNdx > 0) {
donatien	0:b802fc31f1db	1628	LCPDEBUG(LOG_INFO, ("lcp_reqci: %s\n", traceBuf));
donatien	0:b802fc31f1db	1629	}
donatien	0:b802fc31f1db	1630	#endif
donatien	0:b802fc31f1db	1631	LCPDEBUG(LOG_INFO, ("lcp_reqci: returning CONF%s.\n", CODENAME(rc)));
donatien	0:b802fc31f1db	1632	return (rc); /* Return final code */
donatien	0:b802fc31f1db	1633	}
donatien	0:b802fc31f1db	1634
donatien	0:b802fc31f1db	1635
donatien	0:b802fc31f1db	1636	/*
donatien	0:b802fc31f1db	1637	* lcp_up - LCP has come UP.
donatien	0:b802fc31f1db	1638	*/
donatien	0:b802fc31f1db	1639	static void
donatien	0:b802fc31f1db	1640	lcp_up(fsm *f)
donatien	0:b802fc31f1db	1641	{
donatien	0:b802fc31f1db	1642	lcp_options *wo = &lcp_wantoptions[f->unit];
donatien	0:b802fc31f1db	1643	lcp_options *ho = &lcp_hisoptions[f->unit];
donatien	0:b802fc31f1db	1644	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:b802fc31f1db	1645	lcp_options *ao = &lcp_allowoptions[f->unit];
donatien	0:b802fc31f1db	1646
donatien	0:b802fc31f1db	1647	if (!go->neg_magicnumber) {
donatien	0:b802fc31f1db	1648	go->magicnumber = 0;
donatien	0:b802fc31f1db	1649	}
donatien	0:b802fc31f1db	1650	if (!ho->neg_magicnumber) {
donatien	0:b802fc31f1db	1651	ho->magicnumber = 0;
donatien	0:b802fc31f1db	1652	}
donatien	0:b802fc31f1db	1653
donatien	0:b802fc31f1db	1654	/*
donatien	0:b802fc31f1db	1655	* Set our MTU to the smaller of the MTU we wanted and
donatien	0:b802fc31f1db	1656	* the MRU our peer wanted. If we negotiated an MRU,
donatien	0:b802fc31f1db	1657	* set our MRU to the larger of value we wanted and
donatien	0:b802fc31f1db	1658	* the value we got in the negotiation.
donatien	0:b802fc31f1db	1659	*/
donatien	0:b802fc31f1db	1660	ppp_send_config(f->unit, LWIP_MIN(ao->mru, (ho->neg_mru? ho->mru: PPP_MRU)),
donatien	0:b802fc31f1db	1661	(ho->neg_asyncmap? ho->asyncmap: 0xffffffffl),
donatien	0:b802fc31f1db	1662	ho->neg_pcompression, ho->neg_accompression);
donatien	0:b802fc31f1db	1663	/*
donatien	0:b802fc31f1db	1664	* If the asyncmap hasn't been negotiated, we really should
donatien	0:b802fc31f1db	1665	* set the receive asyncmap to ffffffff, but we set it to 0
donatien	0:b802fc31f1db	1666	* for backwards contemptibility.
donatien	0:b802fc31f1db	1667	*/
donatien	0:b802fc31f1db	1668	ppp_recv_config(f->unit, (go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU),
donatien	0:b802fc31f1db	1669	(go->neg_asyncmap? go->asyncmap: 0x00000000),
donatien	0:b802fc31f1db	1670	go->neg_pcompression, go->neg_accompression);
donatien	0:b802fc31f1db	1671
donatien	0:b802fc31f1db	1672	if (ho->neg_mru) {
donatien	0:b802fc31f1db	1673	peer_mru[f->unit] = ho->mru;
donatien	0:b802fc31f1db	1674	}
donatien	0:b802fc31f1db	1675
donatien	0:b802fc31f1db	1676	lcp_echo_lowerup(f->unit); /* Enable echo messages */
donatien	0:b802fc31f1db	1677
donatien	0:b802fc31f1db	1678	link_established(f->unit); /* The link is up; authenticate now */
donatien	0:b802fc31f1db	1679	}
donatien	0:b802fc31f1db	1680
donatien	0:b802fc31f1db	1681
donatien	0:b802fc31f1db	1682	/*
donatien	0:b802fc31f1db	1683	* lcp_down - LCP has gone DOWN.
donatien	0:b802fc31f1db	1684	*
donatien	0:b802fc31f1db	1685	* Alert other protocols.
donatien	0:b802fc31f1db	1686	*/
donatien	0:b802fc31f1db	1687	static void
donatien	0:b802fc31f1db	1688	lcp_down(fsm *f)
donatien	0:b802fc31f1db	1689	{
donatien	0:b802fc31f1db	1690	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:b802fc31f1db	1691
donatien	0:b802fc31f1db	1692	lcp_echo_lowerdown(f->unit);
donatien	0:b802fc31f1db	1693
donatien	0:b802fc31f1db	1694	link_down(f->unit);
donatien	0:b802fc31f1db	1695
donatien	0:b802fc31f1db	1696	ppp_send_config(f->unit, PPP_MRU, 0xffffffffl, 0, 0);
donatien	0:b802fc31f1db	1697	ppp_recv_config(f->unit, PPP_MRU,
donatien	0:b802fc31f1db	1698	(go->neg_asyncmap? go->asyncmap: 0x00000000),
donatien	0:b802fc31f1db	1699	go->neg_pcompression, go->neg_accompression);
donatien	0:b802fc31f1db	1700	peer_mru[f->unit] = PPP_MRU;
donatien	0:b802fc31f1db	1701	}
donatien	0:b802fc31f1db	1702
donatien	0:b802fc31f1db	1703
donatien	0:b802fc31f1db	1704	/*
donatien	0:b802fc31f1db	1705	* lcp_starting - LCP needs the lower layer up.
donatien	0:b802fc31f1db	1706	*/
donatien	0:b802fc31f1db	1707	static void
donatien	0:b802fc31f1db	1708	lcp_starting(fsm *f)
donatien	0:b802fc31f1db	1709	{
donatien	0:b802fc31f1db	1710	link_required(f->unit); /* lwip: currently does nothing */
donatien	0:b802fc31f1db	1711	}
donatien	0:b802fc31f1db	1712
donatien	0:b802fc31f1db	1713
donatien	0:b802fc31f1db	1714	/*
donatien	0:b802fc31f1db	1715	* lcp_finished - LCP has finished with the lower layer.
donatien	0:b802fc31f1db	1716	*/
donatien	0:b802fc31f1db	1717	static void
donatien	0:b802fc31f1db	1718	lcp_finished(fsm *f)
donatien	0:b802fc31f1db	1719	{
donatien	0:b802fc31f1db	1720	link_terminated(f->unit); /* we are finished with the link */
donatien	0:b802fc31f1db	1721	}
donatien	0:b802fc31f1db	1722
donatien	0:b802fc31f1db	1723
donatien	0:b802fc31f1db	1724	#if PPP_ADDITIONAL_CALLBACKS
donatien	0:b802fc31f1db	1725	/*
donatien	0:b802fc31f1db	1726	* print_string - print a readable representation of a string using
donatien	0:b802fc31f1db	1727	* printer.
donatien	0:b802fc31f1db	1728	*/
donatien	0:b802fc31f1db	1729	static void
donatien	0:b802fc31f1db	1730	print_string( char p, int len, void (printer) (void , char , ...), void *arg)
donatien	0:b802fc31f1db	1731	{
donatien	0:b802fc31f1db	1732	int c;
donatien	0:b802fc31f1db	1733
donatien	0:b802fc31f1db	1734	printer(arg, "\"");
donatien	0:b802fc31f1db	1735	for (; len > 0; --len) {
donatien	0:b802fc31f1db	1736	c = *p++;
donatien	0:b802fc31f1db	1737	if (' ' <= c && c <= '~') {
donatien	0:b802fc31f1db	1738	if (c == '\\' \|\| c == '"') {
donatien	0:b802fc31f1db	1739	printer(arg, "\\");
donatien	0:b802fc31f1db	1740	}
donatien	0:b802fc31f1db	1741	printer(arg, "%c", c);
donatien	0:b802fc31f1db	1742	} else {
donatien	0:b802fc31f1db	1743	switch (c) {
donatien	0:b802fc31f1db	1744	case '\n':
donatien	0:b802fc31f1db	1745	printer(arg, "\\n");
donatien	0:b802fc31f1db	1746	break;
donatien	0:b802fc31f1db	1747	case '\r':
donatien	0:b802fc31f1db	1748	printer(arg, "\\r");
donatien	0:b802fc31f1db	1749	break;
donatien	0:b802fc31f1db	1750	case '\t':
donatien	0:b802fc31f1db	1751	printer(arg, "\\t");
donatien	0:b802fc31f1db	1752	break;
donatien	0:b802fc31f1db	1753	default:
donatien	0:b802fc31f1db	1754	printer(arg, "\\%.3o", c);
donatien	0:b802fc31f1db	1755	}
donatien	0:b802fc31f1db	1756	}
donatien	0:b802fc31f1db	1757	}
donatien	0:b802fc31f1db	1758	printer(arg, "\"");
donatien	0:b802fc31f1db	1759	}
donatien	0:b802fc31f1db	1760
donatien	0:b802fc31f1db	1761
donatien	0:b802fc31f1db	1762	/*
donatien	0:b802fc31f1db	1763	* lcp_printpkt - print the contents of an LCP packet.
donatien	0:b802fc31f1db	1764	*/
donatien	0:b802fc31f1db	1765	static char *lcp_codenames[] = {
donatien	0:b802fc31f1db	1766	"ConfReq", "ConfAck", "ConfNak", "ConfRej",
donatien	0:b802fc31f1db	1767	"TermReq", "TermAck", "CodeRej", "ProtRej",
donatien	0:b802fc31f1db	1768	"EchoReq", "EchoRep", "DiscReq"
donatien	0:b802fc31f1db	1769	};
donatien	0:b802fc31f1db	1770
donatien	0:b802fc31f1db	1771	static int
donatien	0:b802fc31f1db	1772	lcp_printpkt( u_char p, int plen, void (printer) (void , char , ...), void *arg)
donatien	0:b802fc31f1db	1773	{
donatien	0:b802fc31f1db	1774	int code, id, len, olen;
donatien	0:b802fc31f1db	1775	u_char pstart, optend;
donatien	0:b802fc31f1db	1776	u_short cishort;
donatien	0:b802fc31f1db	1777	u32_t cilong;
donatien	0:b802fc31f1db	1778
donatien	0:b802fc31f1db	1779	if (plen < HEADERLEN) {
donatien	0:b802fc31f1db	1780	return 0;
donatien	0:b802fc31f1db	1781	}
donatien	0:b802fc31f1db	1782	pstart = p;
donatien	0:b802fc31f1db	1783	GETCHAR(code, p);
donatien	0:b802fc31f1db	1784	GETCHAR(id, p);
donatien	0:b802fc31f1db	1785	GETSHORT(len, p);
donatien	0:b802fc31f1db	1786	if (len < HEADERLEN \|\| len > plen) {
donatien	0:b802fc31f1db	1787	return 0;
donatien	0:b802fc31f1db	1788	}
donatien	0:b802fc31f1db	1789
donatien	0:b802fc31f1db	1790	if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *)) {
donatien	0:b802fc31f1db	1791	printer(arg, " %s", lcp_codenames[code-1]);
donatien	0:b802fc31f1db	1792	} else {
donatien	0:b802fc31f1db	1793	printer(arg, " code=0x%x", code);
donatien	0:b802fc31f1db	1794	}
donatien	0:b802fc31f1db	1795	printer(arg, " id=0x%x", id);
donatien	0:b802fc31f1db	1796	len -= HEADERLEN;
donatien	0:b802fc31f1db	1797	switch (code) {
donatien	0:b802fc31f1db	1798	case CONFREQ:
donatien	0:b802fc31f1db	1799	case CONFACK:
donatien	0:b802fc31f1db	1800	case CONFNAK:
donatien	0:b802fc31f1db	1801	case CONFREJ:
donatien	0:b802fc31f1db	1802	/* print option list */
donatien	0:b802fc31f1db	1803	while (len >= 2) {
donatien	0:b802fc31f1db	1804	GETCHAR(code, p);
donatien	0:b802fc31f1db	1805	GETCHAR(olen, p);
donatien	0:b802fc31f1db	1806	p -= 2;
donatien	0:b802fc31f1db	1807	if (olen < 2 \|\| olen > len) {
donatien	0:b802fc31f1db	1808	break;
donatien	0:b802fc31f1db	1809	}
donatien	0:b802fc31f1db	1810	printer(arg, " <");
donatien	0:b802fc31f1db	1811	len -= olen;
donatien	0:b802fc31f1db	1812	optend = p + olen;
donatien	0:b802fc31f1db	1813	switch (code) {
donatien	0:b802fc31f1db	1814	case CI_MRU:
donatien	0:b802fc31f1db	1815	if (olen == CILEN_SHORT) {
donatien	0:b802fc31f1db	1816	p += 2;
donatien	0:b802fc31f1db	1817	GETSHORT(cishort, p);
donatien	0:b802fc31f1db	1818	printer(arg, "mru %d", cishort);
donatien	0:b802fc31f1db	1819	}
donatien	0:b802fc31f1db	1820	break;
donatien	0:b802fc31f1db	1821	case CI_ASYNCMAP:
donatien	0:b802fc31f1db	1822	if (olen == CILEN_LONG) {
donatien	0:b802fc31f1db	1823	p += 2;
donatien	0:b802fc31f1db	1824	GETLONG(cilong, p);
donatien	0:b802fc31f1db	1825	printer(arg, "asyncmap 0x%lx", cilong);
donatien	0:b802fc31f1db	1826	}
donatien	0:b802fc31f1db	1827	break;
donatien	0:b802fc31f1db	1828	case CI_AUTHTYPE:
donatien	0:b802fc31f1db	1829	if (olen >= CILEN_SHORT) {
donatien	0:b802fc31f1db	1830	p += 2;
donatien	0:b802fc31f1db	1831	printer(arg, "auth ");
donatien	0:b802fc31f1db	1832	GETSHORT(cishort, p);
donatien	0:b802fc31f1db	1833	switch (cishort) {
donatien	0:b802fc31f1db	1834	case PPP_PAP:
donatien	0:b802fc31f1db	1835	printer(arg, "pap");
donatien	0:b802fc31f1db	1836	break;
donatien	0:b802fc31f1db	1837	case PPP_CHAP:
donatien	0:b802fc31f1db	1838	printer(arg, "chap");
donatien	0:b802fc31f1db	1839	break;
donatien	0:b802fc31f1db	1840	default:
donatien	0:b802fc31f1db	1841	printer(arg, "0x%x", cishort);
donatien	0:b802fc31f1db	1842	}
donatien	0:b802fc31f1db	1843	}
donatien	0:b802fc31f1db	1844	break;
donatien	0:b802fc31f1db	1845	case CI_QUALITY:
donatien	0:b802fc31f1db	1846	if (olen >= CILEN_SHORT) {
donatien	0:b802fc31f1db	1847	p += 2;
donatien	0:b802fc31f1db	1848	printer(arg, "quality ");
donatien	0:b802fc31f1db	1849	GETSHORT(cishort, p);
donatien	0:b802fc31f1db	1850	switch (cishort) {
donatien	0:b802fc31f1db	1851	case PPP_LQR:
donatien	0:b802fc31f1db	1852	printer(arg, "lqr");
donatien	0:b802fc31f1db	1853	break;
donatien	0:b802fc31f1db	1854	default:
donatien	0:b802fc31f1db	1855	printer(arg, "0x%x", cishort);
donatien	0:b802fc31f1db	1856	}
donatien	0:b802fc31f1db	1857	}
donatien	0:b802fc31f1db	1858	break;
donatien	0:b802fc31f1db	1859	case CI_CALLBACK:
donatien	0:b802fc31f1db	1860	if (olen >= CILEN_CHAR) {
donatien	0:b802fc31f1db	1861	p += 2;
donatien	0:b802fc31f1db	1862	printer(arg, "callback ");
donatien	0:b802fc31f1db	1863	GETSHORT(cishort, p);
donatien	0:b802fc31f1db	1864	switch (cishort) {
donatien	0:b802fc31f1db	1865	case CBCP_OPT:
donatien	0:b802fc31f1db	1866	printer(arg, "CBCP");
donatien	0:b802fc31f1db	1867	break;
donatien	0:b802fc31f1db	1868	default:
donatien	0:b802fc31f1db	1869	printer(arg, "0x%x", cishort);
donatien	0:b802fc31f1db	1870	}
donatien	0:b802fc31f1db	1871	}
donatien	0:b802fc31f1db	1872	break;
donatien	0:b802fc31f1db	1873	case CI_MAGICNUMBER:
donatien	0:b802fc31f1db	1874	if (olen == CILEN_LONG) {
donatien	0:b802fc31f1db	1875	p += 2;
donatien	0:b802fc31f1db	1876	GETLONG(cilong, p);
donatien	0:b802fc31f1db	1877	printer(arg, "magic 0x%x", cilong);
donatien	0:b802fc31f1db	1878	}
donatien	0:b802fc31f1db	1879	break;
donatien	0:b802fc31f1db	1880	case CI_PCOMPRESSION:
donatien	0:b802fc31f1db	1881	if (olen == CILEN_VOID) {
donatien	0:b802fc31f1db	1882	p += 2;
donatien	0:b802fc31f1db	1883	printer(arg, "pcomp");
donatien	0:b802fc31f1db	1884	}
donatien	0:b802fc31f1db	1885	break;
donatien	0:b802fc31f1db	1886	case CI_ACCOMPRESSION:
donatien	0:b802fc31f1db	1887	if (olen == CILEN_VOID) {
donatien	0:b802fc31f1db	1888	p += 2;
donatien	0:b802fc31f1db	1889	printer(arg, "accomp");
donatien	0:b802fc31f1db	1890	}
donatien	0:b802fc31f1db	1891	break;
donatien	0:b802fc31f1db	1892	}
donatien	0:b802fc31f1db	1893	while (p < optend) {
donatien	0:b802fc31f1db	1894	GETCHAR(code, p);
donatien	0:b802fc31f1db	1895	printer(arg, " %.2x", code);
donatien	0:b802fc31f1db	1896	}
donatien	0:b802fc31f1db	1897	printer(arg, ">");
donatien	0:b802fc31f1db	1898	}
donatien	0:b802fc31f1db	1899	break;
donatien	0:b802fc31f1db	1900
donatien	0:b802fc31f1db	1901	case TERMACK:
donatien	0:b802fc31f1db	1902	case TERMREQ:
donatien	0:b802fc31f1db	1903	if (len > 0 && p >= ' ' && p < 0x7f) {
donatien	0:b802fc31f1db	1904	printer(arg, " ");
donatien	0:b802fc31f1db	1905	print_string((char*)p, len, printer, arg);
donatien	0:b802fc31f1db	1906	p += len;
donatien	0:b802fc31f1db	1907	len = 0;
donatien	0:b802fc31f1db	1908	}
donatien	0:b802fc31f1db	1909	break;
donatien	0:b802fc31f1db	1910
donatien	0:b802fc31f1db	1911	case ECHOREQ:
donatien	0:b802fc31f1db	1912	case ECHOREP:
donatien	0:b802fc31f1db	1913	case DISCREQ:
donatien	0:b802fc31f1db	1914	if (len >= 4) {
donatien	0:b802fc31f1db	1915	GETLONG(cilong, p);
donatien	0:b802fc31f1db	1916	printer(arg, " magic=0x%x", cilong);
donatien	0:b802fc31f1db	1917	p += 4;
donatien	0:b802fc31f1db	1918	len -= 4;
donatien	0:b802fc31f1db	1919	}
donatien	0:b802fc31f1db	1920	break;
donatien	0:b802fc31f1db	1921	}
donatien	0:b802fc31f1db	1922
donatien	0:b802fc31f1db	1923	/* print the rest of the bytes in the packet */
donatien	0:b802fc31f1db	1924	for (; len > 0; --len) {
donatien	0:b802fc31f1db	1925	GETCHAR(code, p);
donatien	0:b802fc31f1db	1926	printer(arg, " %.2x", code);
donatien	0:b802fc31f1db	1927	}
donatien	0:b802fc31f1db	1928
donatien	0:b802fc31f1db	1929	return (int)(p - pstart);
donatien	0:b802fc31f1db	1930	}
donatien	0:b802fc31f1db	1931	#endif /* PPP_ADDITIONAL_CALLBACKS */
donatien	0:b802fc31f1db	1932
donatien	0:b802fc31f1db	1933	/*
donatien	0:b802fc31f1db	1934	* Time to shut down the link because there is nothing out there.
donatien	0:b802fc31f1db	1935	*/
donatien	0:b802fc31f1db	1936	static void
donatien	0:b802fc31f1db	1937	LcpLinkFailure (fsm *f)
donatien	0:b802fc31f1db	1938	{
donatien	0:b802fc31f1db	1939	if (f->state == LS_OPENED) {
donatien	0:b802fc31f1db	1940	LCPDEBUG(LOG_INFO, ("No response to %d echo-requests\n", lcp_echos_pending));
donatien	0:b802fc31f1db	1941	LCPDEBUG(LOG_NOTICE, ("Serial link appears to be disconnected.\n"));
donatien	0:b802fc31f1db	1942	lcp_close(f->unit, "Peer not responding");
donatien	0:b802fc31f1db	1943	}
donatien	0:b802fc31f1db	1944	}
donatien	0:b802fc31f1db	1945
donatien	0:b802fc31f1db	1946	/*
donatien	0:b802fc31f1db	1947	* Timer expired for the LCP echo requests from this process.
donatien	0:b802fc31f1db	1948	*/
donatien	0:b802fc31f1db	1949	static void
donatien	0:b802fc31f1db	1950	LcpEchoCheck (fsm *f)
donatien	0:b802fc31f1db	1951	{
donatien	0:b802fc31f1db	1952	LcpSendEchoRequest (f);
donatien	0:b802fc31f1db	1953
donatien	0:b802fc31f1db	1954	/*
donatien	0:b802fc31f1db	1955	* Start the timer for the next interval.
donatien	0:b802fc31f1db	1956	*/
donatien	0:b802fc31f1db	1957	LWIP_ASSERT("lcp_echo_timer_running == 0", lcp_echo_timer_running == 0);
donatien	0:b802fc31f1db	1958
donatien	0:b802fc31f1db	1959	TIMEOUT (LcpEchoTimeout, f, lcp_echo_interval);
donatien	0:b802fc31f1db	1960	lcp_echo_timer_running = 1;
donatien	0:b802fc31f1db	1961	}
donatien	0:b802fc31f1db	1962
donatien	0:b802fc31f1db	1963	/*
donatien	0:b802fc31f1db	1964	* LcpEchoTimeout - Timer expired on the LCP echo
donatien	0:b802fc31f1db	1965	*/
donatien	0:b802fc31f1db	1966	static void
donatien	0:b802fc31f1db	1967	LcpEchoTimeout (void *arg)
donatien	0:b802fc31f1db	1968	{
donatien	0:b802fc31f1db	1969	if (lcp_echo_timer_running != 0) {
donatien	0:b802fc31f1db	1970	lcp_echo_timer_running = 0;
donatien	0:b802fc31f1db	1971	LcpEchoCheck ((fsm *) arg);
donatien	0:b802fc31f1db	1972	}
donatien	0:b802fc31f1db	1973	}
donatien	0:b802fc31f1db	1974
donatien	0:b802fc31f1db	1975	/*
donatien	0:b802fc31f1db	1976	* LcpEchoReply - LCP has received a reply to the echo
donatien	0:b802fc31f1db	1977	*/
donatien	0:b802fc31f1db	1978	static void
donatien	0:b802fc31f1db	1979	lcp_received_echo_reply (fsm f, int id, u_char inp, int len)
donatien	0:b802fc31f1db	1980	{
donatien	0:b802fc31f1db	1981	u32_t magic;
donatien	0:b802fc31f1db	1982
donatien	0:b802fc31f1db	1983	LWIP_UNUSED_ARG(id);
donatien	0:b802fc31f1db	1984
donatien	0:b802fc31f1db	1985	/* Check the magic number - don't count replies from ourselves. */
donatien	0:b802fc31f1db	1986	if (len < 4) {
donatien	0:b802fc31f1db	1987	LCPDEBUG(LOG_WARNING, ("lcp: received short Echo-Reply, length %d\n", len));
donatien	0:b802fc31f1db	1988	return;
donatien	0:b802fc31f1db	1989	}
donatien	0:b802fc31f1db	1990	GETLONG(magic, inp);
donatien	0:b802fc31f1db	1991	if (lcp_gotoptions[f->unit].neg_magicnumber && magic == lcp_gotoptions[f->unit].magicnumber) {
donatien	0:b802fc31f1db	1992	LCPDEBUG(LOG_WARNING, ("appear to have received our own echo-reply!\n"));
donatien	0:b802fc31f1db	1993	return;
donatien	0:b802fc31f1db	1994	}
donatien	0:b802fc31f1db	1995
donatien	0:b802fc31f1db	1996	/* Reset the number of outstanding echo frames */
donatien	0:b802fc31f1db	1997	lcp_echos_pending = 0;
donatien	0:b802fc31f1db	1998	}
donatien	0:b802fc31f1db	1999
donatien	0:b802fc31f1db	2000	/*
donatien	0:b802fc31f1db	2001	* LcpSendEchoRequest - Send an echo request frame to the peer
donatien	0:b802fc31f1db	2002	*/
donatien	0:b802fc31f1db	2003	static void
donatien	0:b802fc31f1db	2004	LcpSendEchoRequest (fsm *f)
donatien	0:b802fc31f1db	2005	{
donatien	0:b802fc31f1db	2006	u32_t lcp_magic;
donatien	0:b802fc31f1db	2007	u_char pkt[4], *pktp;
donatien	0:b802fc31f1db	2008
donatien	0:b802fc31f1db	2009	/*
donatien	0:b802fc31f1db	2010	* Detect the failure of the peer at this point.
donatien	0:b802fc31f1db	2011	*/
donatien	0:b802fc31f1db	2012	if (lcp_echo_fails != 0) {
donatien	0:b802fc31f1db	2013	if (lcp_echos_pending >= lcp_echo_fails) {
donatien	0:b802fc31f1db	2014	LcpLinkFailure(f);
donatien	0:b802fc31f1db	2015	lcp_echos_pending = 0;
donatien	0:b802fc31f1db	2016	}
donatien	0:b802fc31f1db	2017	}
donatien	0:b802fc31f1db	2018
donatien	0:b802fc31f1db	2019	/*
donatien	0:b802fc31f1db	2020	* Make and send the echo request frame.
donatien	0:b802fc31f1db	2021	*/
donatien	0:b802fc31f1db	2022	if (f->state == LS_OPENED) {
donatien	0:b802fc31f1db	2023	lcp_magic = lcp_gotoptions[f->unit].magicnumber;
donatien	0:b802fc31f1db	2024	pktp = pkt;
donatien	0:b802fc31f1db	2025	PUTLONG(lcp_magic, pktp);
donatien	0:b802fc31f1db	2026	fsm_sdata(f, ECHOREQ, (u_char)(lcp_echo_number++ & 0xFF), pkt, (int)(pktp - pkt));
donatien	0:b802fc31f1db	2027	++lcp_echos_pending;
donatien	0:b802fc31f1db	2028	}
donatien	0:b802fc31f1db	2029	}
donatien	0:b802fc31f1db	2030
donatien	0:b802fc31f1db	2031	/*
donatien	0:b802fc31f1db	2032	* lcp_echo_lowerup - Start the timer for the LCP frame
donatien	0:b802fc31f1db	2033	*/
donatien	0:b802fc31f1db	2034
donatien	0:b802fc31f1db	2035	static void
donatien	0:b802fc31f1db	2036	lcp_echo_lowerup (int unit)
donatien	0:b802fc31f1db	2037	{
donatien	0:b802fc31f1db	2038	fsm *f = &lcp_fsm[unit];
donatien	0:b802fc31f1db	2039
donatien	0:b802fc31f1db	2040	/* Clear the parameters for generating echo frames */
donatien	0:b802fc31f1db	2041	lcp_echos_pending = 0;
donatien	0:b802fc31f1db	2042	lcp_echo_number = 0;
donatien	0:b802fc31f1db	2043	lcp_echo_timer_running = 0;
donatien	0:b802fc31f1db	2044
donatien	0:b802fc31f1db	2045	/* If a timeout interval is specified then start the timer */
donatien	0:b802fc31f1db	2046	if (lcp_echo_interval != 0) {
donatien	0:b802fc31f1db	2047	LcpEchoCheck (f);
donatien	0:b802fc31f1db	2048	}
donatien	0:b802fc31f1db	2049	}
donatien	0:b802fc31f1db	2050
donatien	0:b802fc31f1db	2051	/*
donatien	0:b802fc31f1db	2052	* lcp_echo_lowerdown - Stop the timer for the LCP frame
donatien	0:b802fc31f1db	2053	*/
donatien	0:b802fc31f1db	2054
donatien	0:b802fc31f1db	2055	static void
donatien	0:b802fc31f1db	2056	lcp_echo_lowerdown (int unit)
donatien	0:b802fc31f1db	2057	{
donatien	0:b802fc31f1db	2058	fsm *f = &lcp_fsm[unit];
donatien	0:b802fc31f1db	2059
donatien	0:b802fc31f1db	2060	if (lcp_echo_timer_running != 0) {
donatien	0:b802fc31f1db	2061	UNTIMEOUT (LcpEchoTimeout, f);
donatien	0:b802fc31f1db	2062	lcp_echo_timer_running = 0;
donatien	0:b802fc31f1db	2063	}
donatien	0:b802fc31f1db	2064	}
donatien	0:b802fc31f1db	2065
donatien	0:b802fc31f1db	2066	#endif /* PPP_SUPPORT */

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Type:	Program
Created:	09 Jul 2010
Imports:	20
Forks:	0
Commits:	5
Dependents:	0
Dependencies:	0
Followers:	3

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lwip/netif/ppp/lcp.c@4:e00281c7453d, 2010-08-06 (annotated)

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lwip/netif/ppp/lcp.c@4:e00281c7453d, 2010-08-06 (annotated)

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