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lwip/netif/ppp/lcp.c@0:d7bd7384a37c, 2016-12-07 (annotated)

Committer:: grzemich
Date:: Wed Dec 07 23:47:50 2016 +0000
Revision:: 0:d7bd7384a37c

dgd

Who changed what in which revision?

User	Revision	Line number	New contents of line
grzemich	0:d7bd7384a37c	1	/*****************************************************************************
grzemich	0:d7bd7384a37c	2	* lcp.c - Network Link Control Protocol program file.
grzemich	0:d7bd7384a37c	3	*
grzemich	0:d7bd7384a37c	4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
grzemich	0:d7bd7384a37c	5	* portions Copyright (c) 1997 by Global Election Systems Inc.
grzemich	0:d7bd7384a37c	6	*
grzemich	0:d7bd7384a37c	7	* The authors hereby grant permission to use, copy, modify, distribute,
grzemich	0:d7bd7384a37c	8	* and license this software and its documentation for any purpose, provided
grzemich	0:d7bd7384a37c	9	* that existing copyright notices are retained in all copies and that this
grzemich	0:d7bd7384a37c	10	* notice and the following disclaimer are included verbatim in any
grzemich	0:d7bd7384a37c	11	* distributions. No written agreement, license, or royalty fee is required
grzemich	0:d7bd7384a37c	12	* for any of the authorized uses.
grzemich	0:d7bd7384a37c	13	*
grzemich	0:d7bd7384a37c	14	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
grzemich	0:d7bd7384a37c	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
grzemich	0:d7bd7384a37c	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
grzemich	0:d7bd7384a37c	17	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
grzemich	0:d7bd7384a37c	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
grzemich	0:d7bd7384a37c	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
grzemich	0:d7bd7384a37c	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
grzemich	0:d7bd7384a37c	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
grzemich	0:d7bd7384a37c	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
grzemich	0:d7bd7384a37c	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
grzemich	0:d7bd7384a37c	24	*
grzemich	0:d7bd7384a37c	25	******************************************************************************
grzemich	0:d7bd7384a37c	26	* REVISION HISTORY
grzemich	0:d7bd7384a37c	27	*
grzemich	0:d7bd7384a37c	28	* 03-01-01 Marc Boucher <marc@mbsi.ca>
grzemich	0:d7bd7384a37c	29	* Ported to lwIP.
grzemich	0:d7bd7384a37c	30	* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
grzemich	0:d7bd7384a37c	31	* Original.
grzemich	0:d7bd7384a37c	32	*****************************************************************************/
grzemich	0:d7bd7384a37c	33
grzemich	0:d7bd7384a37c	34	/*
grzemich	0:d7bd7384a37c	35	* lcp.c - PPP Link Control Protocol.
grzemich	0:d7bd7384a37c	36	*
grzemich	0:d7bd7384a37c	37	* Copyright (c) 1989 Carnegie Mellon University.
grzemich	0:d7bd7384a37c	38	* All rights reserved.
grzemich	0:d7bd7384a37c	39	*
grzemich	0:d7bd7384a37c	40	* Redistribution and use in source and binary forms are permitted
grzemich	0:d7bd7384a37c	41	* provided that the above copyright notice and this paragraph are
grzemich	0:d7bd7384a37c	42	* duplicated in all such forms and that any documentation,
grzemich	0:d7bd7384a37c	43	* advertising materials, and other materials related to such
grzemich	0:d7bd7384a37c	44	* distribution and use acknowledge that the software was developed
grzemich	0:d7bd7384a37c	45	* by Carnegie Mellon University. The name of the
grzemich	0:d7bd7384a37c	46	* University may not be used to endorse or promote products derived
grzemich	0:d7bd7384a37c	47	* from this software without specific prior written permission.
grzemich	0:d7bd7384a37c	48	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
grzemich	0:d7bd7384a37c	49	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
grzemich	0:d7bd7384a37c	50	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
grzemich	0:d7bd7384a37c	51	*/
grzemich	0:d7bd7384a37c	52
grzemich	0:d7bd7384a37c	53
grzemich	0:d7bd7384a37c	54	#include "lwip/opt.h"
grzemich	0:d7bd7384a37c	55
grzemich	0:d7bd7384a37c	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
grzemich	0:d7bd7384a37c	57
grzemich	0:d7bd7384a37c	58	#include "ppp.h"
grzemich	0:d7bd7384a37c	59	#include "pppdebug.h"
grzemich	0:d7bd7384a37c	60
grzemich	0:d7bd7384a37c	61	#include "fsm.h"
grzemich	0:d7bd7384a37c	62	#include "chap.h"
grzemich	0:d7bd7384a37c	63	#include "magic.h"
grzemich	0:d7bd7384a37c	64	#include "auth.h"
grzemich	0:d7bd7384a37c	65	#include "lcp.h"
grzemich	0:d7bd7384a37c	66
grzemich	0:d7bd7384a37c	67	#include <string.h>
grzemich	0:d7bd7384a37c	68
grzemich	0:d7bd7384a37c	69	#if PPPOE_SUPPORT
grzemich	0:d7bd7384a37c	70	#include "netif/ppp_oe.h"
grzemich	0:d7bd7384a37c	71	#else
grzemich	0:d7bd7384a37c	72	#define PPPOE_MAXMTU PPP_MAXMRU
grzemich	0:d7bd7384a37c	73	#endif
grzemich	0:d7bd7384a37c	74
grzemich	0:d7bd7384a37c	75	#if 0 /* UNUSED */
grzemich	0:d7bd7384a37c	76	/*
grzemich	0:d7bd7384a37c	77	* LCP-related command-line options.
grzemich	0:d7bd7384a37c	78	*/
grzemich	0:d7bd7384a37c	79	int lcp_echo_interval = 0; /* Interval between LCP echo-requests */
grzemich	0:d7bd7384a37c	80	int lcp_echo_fails = 0; /* Tolerance to unanswered echo-requests */
grzemich	0:d7bd7384a37c	81	bool lax_recv = 0; /* accept control chars in asyncmap */
grzemich	0:d7bd7384a37c	82
grzemich	0:d7bd7384a37c	83	static int setescape (char **);
grzemich	0:d7bd7384a37c	84
grzemich	0:d7bd7384a37c	85	static option_t lcp_option_list[] = {
grzemich	0:d7bd7384a37c	86	/* LCP options */
grzemich	0:d7bd7384a37c	87	/* list stripped for simplicity */
grzemich	0:d7bd7384a37c	88	{NULL}
grzemich	0:d7bd7384a37c	89	};
grzemich	0:d7bd7384a37c	90	#endif /* UNUSED */
grzemich	0:d7bd7384a37c	91
grzemich	0:d7bd7384a37c	92	/* options */
grzemich	0:d7bd7384a37c	93	LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */
grzemich	0:d7bd7384a37c	94	static u_int lcp_echo_interval = LCP_ECHOINTERVAL; /* Interval between LCP echo-requests */
grzemich	0:d7bd7384a37c	95	static u_int lcp_echo_fails = LCP_MAXECHOFAILS; /* Tolerance to unanswered echo-requests */
grzemich	0:d7bd7384a37c	96
grzemich	0:d7bd7384a37c	97	/* global vars */
grzemich	0:d7bd7384a37c	98	static fsm lcp_fsm[NUM_PPP]; /* LCP fsm structure (global)*/
grzemich	0:d7bd7384a37c	99	lcp_options lcp_wantoptions[NUM_PPP]; /* Options that we want to request */
grzemich	0:d7bd7384a37c	100	lcp_options lcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
grzemich	0:d7bd7384a37c	101	lcp_options lcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
grzemich	0:d7bd7384a37c	102	lcp_options lcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
grzemich	0:d7bd7384a37c	103	ext_accm xmit_accm[NUM_PPP]; /* extended transmit ACCM */
grzemich	0:d7bd7384a37c	104
grzemich	0:d7bd7384a37c	105	static u32_t lcp_echos_pending = 0; /* Number of outstanding echo msgs */
grzemich	0:d7bd7384a37c	106	static u32_t lcp_echo_number = 0; /* ID number of next echo frame */
grzemich	0:d7bd7384a37c	107	static u32_t lcp_echo_timer_running = 0; /* TRUE if a timer is running */
grzemich	0:d7bd7384a37c	108
grzemich	0:d7bd7384a37c	109	/* @todo: do we really need such a large buffer? The typical 1500 bytes seem too much. */
grzemich	0:d7bd7384a37c	110	static u_char nak_buffer[PPP_MRU] __attribute((section("AHBSRAM1"))); /* where we construct a nak packet */
grzemich	0:d7bd7384a37c	111
grzemich	0:d7bd7384a37c	112	/*
grzemich	0:d7bd7384a37c	113	* Callbacks for fsm code. (CI = Configuration Information)
grzemich	0:d7bd7384a37c	114	*/
grzemich	0:d7bd7384a37c	115	static void lcp_resetci (fsm); / Reset our CI */
grzemich	0:d7bd7384a37c	116	static int lcp_cilen (fsm); / Return length of our CI */
grzemich	0:d7bd7384a37c	117	static void lcp_addci (fsm, u_char, int); / Add our CI to pkt */
grzemich	0:d7bd7384a37c	118	static int lcp_ackci (fsm, u_char, int); /* Peer ack'd our CI */
grzemich	0:d7bd7384a37c	119	static int lcp_nakci (fsm, u_char, int); /* Peer nak'd our CI */
grzemich	0:d7bd7384a37c	120	static int lcp_rejci (fsm, u_char, int); /* Peer rej'd our CI */
grzemich	0:d7bd7384a37c	121	static int lcp_reqci (fsm, u_char, int, int); / Rcv peer CI */
grzemich	0:d7bd7384a37c	122	static void lcp_up (fsm); / We're UP */
grzemich	0:d7bd7384a37c	123	static void lcp_down (fsm); / We're DOWN */
grzemich	0:d7bd7384a37c	124	static void lcp_starting (fsm); / We need lower layer up */
grzemich	0:d7bd7384a37c	125	static void lcp_finished (fsm); / We need lower layer down */
grzemich	0:d7bd7384a37c	126	static int lcp_extcode (fsm, int, u_char, u_char, int);
grzemich	0:d7bd7384a37c	127	static void lcp_rprotrej (fsm, u_char, int);
grzemich	0:d7bd7384a37c	128
grzemich	0:d7bd7384a37c	129	/*
grzemich	0:d7bd7384a37c	130	* routines to send LCP echos to peer
grzemich	0:d7bd7384a37c	131	*/
grzemich	0:d7bd7384a37c	132
grzemich	0:d7bd7384a37c	133	static void lcp_echo_lowerup (int);
grzemich	0:d7bd7384a37c	134	static void lcp_echo_lowerdown (int);
grzemich	0:d7bd7384a37c	135	static void LcpEchoTimeout (void*);
grzemich	0:d7bd7384a37c	136	static void lcp_received_echo_reply (fsm, int, u_char, int);
grzemich	0:d7bd7384a37c	137	static void LcpSendEchoRequest (fsm*);
grzemich	0:d7bd7384a37c	138	static void LcpLinkFailure (fsm*);
grzemich	0:d7bd7384a37c	139	static void LcpEchoCheck (fsm*);
grzemich	0:d7bd7384a37c	140
grzemich	0:d7bd7384a37c	141	static fsm_callbacks lcp_callbacks = { /* LCP callback routines */
grzemich	0:d7bd7384a37c	142	lcp_resetci, /* Reset our Configuration Information */
grzemich	0:d7bd7384a37c	143	lcp_cilen, /* Length of our Configuration Information */
grzemich	0:d7bd7384a37c	144	lcp_addci, /* Add our Configuration Information */
grzemich	0:d7bd7384a37c	145	lcp_ackci, /* ACK our Configuration Information */
grzemich	0:d7bd7384a37c	146	lcp_nakci, /* NAK our Configuration Information */
grzemich	0:d7bd7384a37c	147	lcp_rejci, /* Reject our Configuration Information */
grzemich	0:d7bd7384a37c	148	lcp_reqci, /* Request peer's Configuration Information */
grzemich	0:d7bd7384a37c	149	lcp_up, /* Called when fsm reaches LS_OPENED state */
grzemich	0:d7bd7384a37c	150	lcp_down, /* Called when fsm leaves LS_OPENED state */
grzemich	0:d7bd7384a37c	151	lcp_starting, /* Called when we want the lower layer up */
grzemich	0:d7bd7384a37c	152	lcp_finished, /* Called when we want the lower layer down */
grzemich	0:d7bd7384a37c	153	NULL, /* Called when Protocol-Reject received */
grzemich	0:d7bd7384a37c	154	NULL, /* Retransmission is necessary */
grzemich	0:d7bd7384a37c	155	lcp_extcode, /* Called to handle LCP-specific codes */
grzemich	0:d7bd7384a37c	156	"LCP" /* String name of protocol */
grzemich	0:d7bd7384a37c	157	};
grzemich	0:d7bd7384a37c	158
grzemich	0:d7bd7384a37c	159	/*
grzemich	0:d7bd7384a37c	160	* Protocol entry points.
grzemich	0:d7bd7384a37c	161	* Some of these are called directly.
grzemich	0:d7bd7384a37c	162	*/
grzemich	0:d7bd7384a37c	163
grzemich	0:d7bd7384a37c	164	static void lcp_input (int, u_char *, int);
grzemich	0:d7bd7384a37c	165	static void lcp_protrej (int);
grzemich	0:d7bd7384a37c	166
grzemich	0:d7bd7384a37c	167	struct protent lcp_protent = {
grzemich	0:d7bd7384a37c	168	PPP_LCP,
grzemich	0:d7bd7384a37c	169	lcp_init,
grzemich	0:d7bd7384a37c	170	lcp_input,
grzemich	0:d7bd7384a37c	171	lcp_protrej,
grzemich	0:d7bd7384a37c	172	lcp_lowerup,
grzemich	0:d7bd7384a37c	173	lcp_lowerdown,
grzemich	0:d7bd7384a37c	174	lcp_open,
grzemich	0:d7bd7384a37c	175	lcp_close,
grzemich	0:d7bd7384a37c	176	#if PPP_ADDITIONAL_CALLBACKS
grzemich	0:d7bd7384a37c	177	lcp_printpkt,
grzemich	0:d7bd7384a37c	178	NULL,
grzemich	0:d7bd7384a37c	179	#endif /* PPP_ADDITIONAL_CALLBACKS */
grzemich	0:d7bd7384a37c	180	1,
grzemich	0:d7bd7384a37c	181	"LCP",
grzemich	0:d7bd7384a37c	182	#if PPP_ADDITIONAL_CALLBACKS
grzemich	0:d7bd7384a37c	183	NULL,
grzemich	0:d7bd7384a37c	184	NULL,
grzemich	0:d7bd7384a37c	185	NULL
grzemich	0:d7bd7384a37c	186	#endif /* PPP_ADDITIONAL_CALLBACKS */
grzemich	0:d7bd7384a37c	187	};
grzemich	0:d7bd7384a37c	188
grzemich	0:d7bd7384a37c	189	int lcp_loopbackfail = DEFLOOPBACKFAIL;
grzemich	0:d7bd7384a37c	190
grzemich	0:d7bd7384a37c	191	/*
grzemich	0:d7bd7384a37c	192	* Length of each type of configuration option (in octets)
grzemich	0:d7bd7384a37c	193	*/
grzemich	0:d7bd7384a37c	194	#define CILEN_VOID 2
grzemich	0:d7bd7384a37c	195	#define CILEN_CHAR 3
grzemich	0:d7bd7384a37c	196	#define CILEN_SHORT 4 /* CILEN_VOID + sizeof(short) */
grzemich	0:d7bd7384a37c	197	#define CILEN_CHAP 5 /* CILEN_VOID + sizeof(short) + 1 */
grzemich	0:d7bd7384a37c	198	#define CILEN_LONG 6 /* CILEN_VOID + sizeof(long) */
grzemich	0:d7bd7384a37c	199	#define CILEN_LQR 8 /* CILEN_VOID + sizeof(short) + sizeof(long) */
grzemich	0:d7bd7384a37c	200	#define CILEN_CBCP 3
grzemich	0:d7bd7384a37c	201
grzemich	0:d7bd7384a37c	202	#define CODENAME(x) ((x) == CONFACK ? "ACK" : (x) == CONFNAK ? "NAK" : "REJ")
grzemich	0:d7bd7384a37c	203
grzemich	0:d7bd7384a37c	204	#if 0 /* UNUSED */
grzemich	0:d7bd7384a37c	205	/*
grzemich	0:d7bd7384a37c	206	* setescape - add chars to the set we escape on transmission.
grzemich	0:d7bd7384a37c	207	*/
grzemich	0:d7bd7384a37c	208	static int
grzemich	0:d7bd7384a37c	209	setescape(argv)
grzemich	0:d7bd7384a37c	210	char **argv;
grzemich	0:d7bd7384a37c	211	{
grzemich	0:d7bd7384a37c	212	int n, ret;
grzemich	0:d7bd7384a37c	213	char p, endp;
grzemich	0:d7bd7384a37c	214
grzemich	0:d7bd7384a37c	215	p = *argv;
grzemich	0:d7bd7384a37c	216	ret = 1;
grzemich	0:d7bd7384a37c	217	while (*p) {
grzemich	0:d7bd7384a37c	218	n = strtol(p, &endp, 16);
grzemich	0:d7bd7384a37c	219	if (p == endp) {
grzemich	0:d7bd7384a37c	220	option_error("escape parameter contains invalid hex number '%s'", p);
grzemich	0:d7bd7384a37c	221	return 0;
grzemich	0:d7bd7384a37c	222	}
grzemich	0:d7bd7384a37c	223	p = endp;
grzemich	0:d7bd7384a37c	224	if (n < 0 \|\| n == 0x5E \|\| n > 0xFF) {
grzemich	0:d7bd7384a37c	225	option_error("can't escape character 0x%x", n);
grzemich	0:d7bd7384a37c	226	ret = 0;
grzemich	0:d7bd7384a37c	227	} else
grzemich	0:d7bd7384a37c	228	xmit_accm[0][n >> 5] \|= 1 << (n & 0x1F);
grzemich	0:d7bd7384a37c	229	while (p == ',' \|\| p == ' ')
grzemich	0:d7bd7384a37c	230	++p;
grzemich	0:d7bd7384a37c	231	}
grzemich	0:d7bd7384a37c	232	return ret;
grzemich	0:d7bd7384a37c	233	}
grzemich	0:d7bd7384a37c	234	#endif /* UNUSED */
grzemich	0:d7bd7384a37c	235
grzemich	0:d7bd7384a37c	236	/*
grzemich	0:d7bd7384a37c	237	* lcp_init - Initialize LCP.
grzemich	0:d7bd7384a37c	238	*/
grzemich	0:d7bd7384a37c	239	void
grzemich	0:d7bd7384a37c	240	lcp_init(int unit)
grzemich	0:d7bd7384a37c	241	{
grzemich	0:d7bd7384a37c	242	fsm *f = &lcp_fsm[unit];
grzemich	0:d7bd7384a37c	243	lcp_options *wo = &lcp_wantoptions[unit];
grzemich	0:d7bd7384a37c	244	lcp_options *ao = &lcp_allowoptions[unit];
grzemich	0:d7bd7384a37c	245
grzemich	0:d7bd7384a37c	246	f->unit = unit;
grzemich	0:d7bd7384a37c	247	f->protocol = PPP_LCP;
grzemich	0:d7bd7384a37c	248	f->callbacks = &lcp_callbacks;
grzemich	0:d7bd7384a37c	249
grzemich	0:d7bd7384a37c	250	fsm_init(f);
grzemich	0:d7bd7384a37c	251
grzemich	0:d7bd7384a37c	252	wo->passive = 0;
grzemich	0:d7bd7384a37c	253	wo->silent = 0;
grzemich	0:d7bd7384a37c	254	wo->restart = 0; /* Set to 1 in kernels or multi-line implementations */
grzemich	0:d7bd7384a37c	255	wo->neg_mru = 1;
grzemich	0:d7bd7384a37c	256	wo->mru = PPP_DEFMRU;
grzemich	0:d7bd7384a37c	257	wo->neg_asyncmap = 1;
grzemich	0:d7bd7384a37c	258	wo->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
grzemich	0:d7bd7384a37c	259	wo->neg_chap = 0; /* Set to 1 on server */
grzemich	0:d7bd7384a37c	260	wo->neg_upap = 0; /* Set to 1 on server */
grzemich	0:d7bd7384a37c	261	wo->chap_mdtype = CHAP_DIGEST_MD5;
grzemich	0:d7bd7384a37c	262	wo->neg_magicnumber = 1;
grzemich	0:d7bd7384a37c	263	wo->neg_pcompression = 1;
grzemich	0:d7bd7384a37c	264	wo->neg_accompression = 1;
grzemich	0:d7bd7384a37c	265	wo->neg_lqr = 0; /* no LQR implementation yet */
grzemich	0:d7bd7384a37c	266	wo->neg_cbcp = 0;
grzemich	0:d7bd7384a37c	267
grzemich	0:d7bd7384a37c	268	ao->neg_mru = 1;
grzemich	0:d7bd7384a37c	269	ao->mru = PPP_MAXMRU;
grzemich	0:d7bd7384a37c	270	ao->neg_asyncmap = 1;
grzemich	0:d7bd7384a37c	271	ao->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
grzemich	0:d7bd7384a37c	272	ao->neg_chap = (CHAP_SUPPORT != 0);
grzemich	0:d7bd7384a37c	273	ao->chap_mdtype = CHAP_DIGEST_MD5;
grzemich	0:d7bd7384a37c	274	ao->neg_upap = (PAP_SUPPORT != 0);
grzemich	0:d7bd7384a37c	275	ao->neg_magicnumber = 1;
grzemich	0:d7bd7384a37c	276	ao->neg_pcompression = 1;
grzemich	0:d7bd7384a37c	277	ao->neg_accompression = 1;
grzemich	0:d7bd7384a37c	278	ao->neg_lqr = 0; /* no LQR implementation yet */
grzemich	0:d7bd7384a37c	279	ao->neg_cbcp = (CBCP_SUPPORT != 0);
grzemich	0:d7bd7384a37c	280
grzemich	0:d7bd7384a37c	281	/*
grzemich	0:d7bd7384a37c	282	* Set transmit escape for the flag and escape characters plus anything
grzemich	0:d7bd7384a37c	283	* set for the allowable options.
grzemich	0:d7bd7384a37c	284	*/
grzemich	0:d7bd7384a37c	285	memset(xmit_accm[unit], 0, sizeof(xmit_accm[0]));
grzemich	0:d7bd7384a37c	286	xmit_accm[unit][15] = 0x60;
grzemich	0:d7bd7384a37c	287	xmit_accm[unit][0] = (u_char)((ao->asyncmap & 0xFF));
grzemich	0:d7bd7384a37c	288	xmit_accm[unit][1] = (u_char)((ao->asyncmap >> 8) & 0xFF);
grzemich	0:d7bd7384a37c	289	xmit_accm[unit][2] = (u_char)((ao->asyncmap >> 16) & 0xFF);
grzemich	0:d7bd7384a37c	290	xmit_accm[unit][3] = (u_char)((ao->asyncmap >> 24) & 0xFF);
grzemich	0:d7bd7384a37c	291	LCPDEBUG(LOG_INFO, ("lcp_init: xmit_accm=%X %X %X %X\n",
grzemich	0:d7bd7384a37c	292	xmit_accm[unit][0],
grzemich	0:d7bd7384a37c	293	xmit_accm[unit][1],
grzemich	0:d7bd7384a37c	294	xmit_accm[unit][2],
grzemich	0:d7bd7384a37c	295	xmit_accm[unit][3]));
grzemich	0:d7bd7384a37c	296
grzemich	0:d7bd7384a37c	297	lcp_phase[unit] = PHASE_INITIALIZE;
grzemich	0:d7bd7384a37c	298	}
grzemich	0:d7bd7384a37c	299
grzemich	0:d7bd7384a37c	300
grzemich	0:d7bd7384a37c	301	/*
grzemich	0:d7bd7384a37c	302	* lcp_open - LCP is allowed to come up.
grzemich	0:d7bd7384a37c	303	*/
grzemich	0:d7bd7384a37c	304	void
grzemich	0:d7bd7384a37c	305	lcp_open(int unit)
grzemich	0:d7bd7384a37c	306	{
grzemich	0:d7bd7384a37c	307	fsm *f = &lcp_fsm[unit];
grzemich	0:d7bd7384a37c	308	lcp_options *wo = &lcp_wantoptions[unit];
grzemich	0:d7bd7384a37c	309
grzemich	0:d7bd7384a37c	310	f->flags = 0;
grzemich	0:d7bd7384a37c	311	if (wo->passive) {
grzemich	0:d7bd7384a37c	312	f->flags \|= OPT_PASSIVE;
grzemich	0:d7bd7384a37c	313	}
grzemich	0:d7bd7384a37c	314	if (wo->silent) {
grzemich	0:d7bd7384a37c	315	f->flags \|= OPT_SILENT;
grzemich	0:d7bd7384a37c	316	}
grzemich	0:d7bd7384a37c	317	fsm_open(f);
grzemich	0:d7bd7384a37c	318
grzemich	0:d7bd7384a37c	319	lcp_phase[unit] = PHASE_ESTABLISH;
grzemich	0:d7bd7384a37c	320	}
grzemich	0:d7bd7384a37c	321
grzemich	0:d7bd7384a37c	322
grzemich	0:d7bd7384a37c	323	/*
grzemich	0:d7bd7384a37c	324	* lcp_close - Take LCP down.
grzemich	0:d7bd7384a37c	325	*/
grzemich	0:d7bd7384a37c	326	void
grzemich	0:d7bd7384a37c	327	lcp_close(int unit, char *reason)
grzemich	0:d7bd7384a37c	328	{
grzemich	0:d7bd7384a37c	329	fsm *f = &lcp_fsm[unit];
grzemich	0:d7bd7384a37c	330
grzemich	0:d7bd7384a37c	331	if (lcp_phase[unit] != PHASE_DEAD) {
grzemich	0:d7bd7384a37c	332	lcp_phase[unit] = PHASE_TERMINATE;
grzemich	0:d7bd7384a37c	333	}
grzemich	0:d7bd7384a37c	334	if (f->state == LS_STOPPED && f->flags & (OPT_PASSIVE\|OPT_SILENT)) {
grzemich	0:d7bd7384a37c	335	/*
grzemich	0:d7bd7384a37c	336	* This action is not strictly according to the FSM in RFC1548,
grzemich	0:d7bd7384a37c	337	* but it does mean that the program terminates if you do an
grzemich	0:d7bd7384a37c	338	* lcp_close() in passive/silent mode when a connection hasn't
grzemich	0:d7bd7384a37c	339	* been established.
grzemich	0:d7bd7384a37c	340	*/
grzemich	0:d7bd7384a37c	341	f->state = LS_CLOSED;
grzemich	0:d7bd7384a37c	342	lcp_finished(f);
grzemich	0:d7bd7384a37c	343	} else {
grzemich	0:d7bd7384a37c	344	fsm_close(f, reason);
grzemich	0:d7bd7384a37c	345	}
grzemich	0:d7bd7384a37c	346	}
grzemich	0:d7bd7384a37c	347
grzemich	0:d7bd7384a37c	348
grzemich	0:d7bd7384a37c	349	/*
grzemich	0:d7bd7384a37c	350	* lcp_lowerup - The lower layer is up.
grzemich	0:d7bd7384a37c	351	*/
grzemich	0:d7bd7384a37c	352	void
grzemich	0:d7bd7384a37c	353	lcp_lowerup(int unit)
grzemich	0:d7bd7384a37c	354	{
grzemich	0:d7bd7384a37c	355	lcp_options *wo = &lcp_wantoptions[unit];
grzemich	0:d7bd7384a37c	356
grzemich	0:d7bd7384a37c	357	/*
grzemich	0:d7bd7384a37c	358	* Don't use A/C or protocol compression on transmission,
grzemich	0:d7bd7384a37c	359	* but accept A/C and protocol compressed packets
grzemich	0:d7bd7384a37c	360	* if we are going to ask for A/C and protocol compression.
grzemich	0:d7bd7384a37c	361	*/
grzemich	0:d7bd7384a37c	362	ppp_set_xaccm(unit, &xmit_accm[unit]);
grzemich	0:d7bd7384a37c	363	ppp_send_config(unit, PPP_MRU, 0xffffffffl, 0, 0);
grzemich	0:d7bd7384a37c	364	ppp_recv_config(unit, PPP_MRU, 0x00000000l,
grzemich	0:d7bd7384a37c	365	wo->neg_pcompression, wo->neg_accompression);
grzemich	0:d7bd7384a37c	366	peer_mru[unit] = PPP_MRU;
grzemich	0:d7bd7384a37c	367	lcp_allowoptions[unit].asyncmap = (u_long)xmit_accm[unit][0]
grzemich	0:d7bd7384a37c	368	\| ((u_long)xmit_accm[unit][1] << 8)
grzemich	0:d7bd7384a37c	369	\| ((u_long)xmit_accm[unit][2] << 16)
grzemich	0:d7bd7384a37c	370	\| ((u_long)xmit_accm[unit][3] << 24);
grzemich	0:d7bd7384a37c	371	LCPDEBUG(LOG_INFO, ("lcp_lowerup: asyncmap=%X %X %X %X\n",
grzemich	0:d7bd7384a37c	372	xmit_accm[unit][3],
grzemich	0:d7bd7384a37c	373	xmit_accm[unit][2],
grzemich	0:d7bd7384a37c	374	xmit_accm[unit][1],
grzemich	0:d7bd7384a37c	375	xmit_accm[unit][0]));
grzemich	0:d7bd7384a37c	376
grzemich	0:d7bd7384a37c	377	fsm_lowerup(&lcp_fsm[unit]);
grzemich	0:d7bd7384a37c	378	}
grzemich	0:d7bd7384a37c	379
grzemich	0:d7bd7384a37c	380
grzemich	0:d7bd7384a37c	381	/*
grzemich	0:d7bd7384a37c	382	* lcp_lowerdown - The lower layer is down.
grzemich	0:d7bd7384a37c	383	*/
grzemich	0:d7bd7384a37c	384	void
grzemich	0:d7bd7384a37c	385	lcp_lowerdown(int unit)
grzemich	0:d7bd7384a37c	386	{
grzemich	0:d7bd7384a37c	387	fsm_lowerdown(&lcp_fsm[unit]);
grzemich	0:d7bd7384a37c	388	}
grzemich	0:d7bd7384a37c	389
grzemich	0:d7bd7384a37c	390
grzemich	0:d7bd7384a37c	391	/*
grzemich	0:d7bd7384a37c	392	* lcp_input - Input LCP packet.
grzemich	0:d7bd7384a37c	393	*/
grzemich	0:d7bd7384a37c	394	static void
grzemich	0:d7bd7384a37c	395	lcp_input(int unit, u_char *p, int len)
grzemich	0:d7bd7384a37c	396	{
grzemich	0:d7bd7384a37c	397	fsm *f = &lcp_fsm[unit];
grzemich	0:d7bd7384a37c	398
grzemich	0:d7bd7384a37c	399	fsm_input(f, p, len);
grzemich	0:d7bd7384a37c	400	}
grzemich	0:d7bd7384a37c	401
grzemich	0:d7bd7384a37c	402
grzemich	0:d7bd7384a37c	403	/*
grzemich	0:d7bd7384a37c	404	* lcp_extcode - Handle a LCP-specific code.
grzemich	0:d7bd7384a37c	405	*/
grzemich	0:d7bd7384a37c	406	static int
grzemich	0:d7bd7384a37c	407	lcp_extcode(fsm f, int code, u_char id, u_char inp, int len)
grzemich	0:d7bd7384a37c	408	{
grzemich	0:d7bd7384a37c	409	u_char *magp;
grzemich	0:d7bd7384a37c	410
grzemich	0:d7bd7384a37c	411	switch( code ){
grzemich	0:d7bd7384a37c	412	case PROTREJ:
grzemich	0:d7bd7384a37c	413	lcp_rprotrej(f, inp, len);
grzemich	0:d7bd7384a37c	414	break;
grzemich	0:d7bd7384a37c	415
grzemich	0:d7bd7384a37c	416	case ECHOREQ:
grzemich	0:d7bd7384a37c	417	if (f->state != LS_OPENED) {
grzemich	0:d7bd7384a37c	418	break;
grzemich	0:d7bd7384a37c	419	}
grzemich	0:d7bd7384a37c	420	LCPDEBUG(LOG_INFO, ("lcp: Echo-Request, Rcvd id %d\n", id));
grzemich	0:d7bd7384a37c	421	magp = inp;
grzemich	0:d7bd7384a37c	422	PUTLONG(lcp_gotoptions[f->unit].magicnumber, magp);
grzemich	0:d7bd7384a37c	423	fsm_sdata(f, ECHOREP, id, inp, len);
grzemich	0:d7bd7384a37c	424	break;
grzemich	0:d7bd7384a37c	425
grzemich	0:d7bd7384a37c	426	case ECHOREP:
grzemich	0:d7bd7384a37c	427	lcp_received_echo_reply(f, id, inp, len);
grzemich	0:d7bd7384a37c	428	break;
grzemich	0:d7bd7384a37c	429
grzemich	0:d7bd7384a37c	430	case DISCREQ:
grzemich	0:d7bd7384a37c	431	break;
grzemich	0:d7bd7384a37c	432
grzemich	0:d7bd7384a37c	433	default:
grzemich	0:d7bd7384a37c	434	return 0;
grzemich	0:d7bd7384a37c	435	}
grzemich	0:d7bd7384a37c	436	return 1;
grzemich	0:d7bd7384a37c	437	}
grzemich	0:d7bd7384a37c	438
grzemich	0:d7bd7384a37c	439
grzemich	0:d7bd7384a37c	440	/*
grzemich	0:d7bd7384a37c	441	* lcp_rprotrej - Receive an Protocol-Reject.
grzemich	0:d7bd7384a37c	442	*
grzemich	0:d7bd7384a37c	443	* Figure out which protocol is rejected and inform it.
grzemich	0:d7bd7384a37c	444	*/
grzemich	0:d7bd7384a37c	445	static void
grzemich	0:d7bd7384a37c	446	lcp_rprotrej(fsm f, u_char inp, int len)
grzemich	0:d7bd7384a37c	447	{
grzemich	0:d7bd7384a37c	448	int i;
grzemich	0:d7bd7384a37c	449	struct protent *protp;
grzemich	0:d7bd7384a37c	450	u_short prot;
grzemich	0:d7bd7384a37c	451
grzemich	0:d7bd7384a37c	452	if (len < (int)sizeof (u_short)) {
grzemich	0:d7bd7384a37c	453	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd short Protocol-Reject packet!\n"));
grzemich	0:d7bd7384a37c	454	return;
grzemich	0:d7bd7384a37c	455	}
grzemich	0:d7bd7384a37c	456
grzemich	0:d7bd7384a37c	457	GETSHORT(prot, inp);
grzemich	0:d7bd7384a37c	458
grzemich	0:d7bd7384a37c	459	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd Protocol-Reject packet for %x!\n", prot));
grzemich	0:d7bd7384a37c	460
grzemich	0:d7bd7384a37c	461	/*
grzemich	0:d7bd7384a37c	462	* Protocol-Reject packets received in any state other than the LCP
grzemich	0:d7bd7384a37c	463	* LS_OPENED state SHOULD be silently discarded.
grzemich	0:d7bd7384a37c	464	*/
grzemich	0:d7bd7384a37c	465	if( f->state != LS_OPENED ) {
grzemich	0:d7bd7384a37c	466	LCPDEBUG(LOG_INFO, ("Protocol-Reject discarded: LCP in state %d\n", f->state));
grzemich	0:d7bd7384a37c	467	return;
grzemich	0:d7bd7384a37c	468	}
grzemich	0:d7bd7384a37c	469
grzemich	0:d7bd7384a37c	470	/*
grzemich	0:d7bd7384a37c	471	* Upcall the proper Protocol-Reject routine.
grzemich	0:d7bd7384a37c	472	*/
grzemich	0:d7bd7384a37c	473	for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
grzemich	0:d7bd7384a37c	474	if (protp->protocol == prot && protp->enabled_flag) {
grzemich	0:d7bd7384a37c	475	(*protp->protrej)(f->unit);
grzemich	0:d7bd7384a37c	476	return;
grzemich	0:d7bd7384a37c	477	}
grzemich	0:d7bd7384a37c	478	}
grzemich	0:d7bd7384a37c	479
grzemich	0:d7bd7384a37c	480	LCPDEBUG(LOG_WARNING, ("Protocol-Reject for unsupported protocol 0x%x\n", prot));
grzemich	0:d7bd7384a37c	481	}
grzemich	0:d7bd7384a37c	482
grzemich	0:d7bd7384a37c	483
grzemich	0:d7bd7384a37c	484	/*
grzemich	0:d7bd7384a37c	485	* lcp_protrej - A Protocol-Reject was received.
grzemich	0:d7bd7384a37c	486	*/
grzemich	0:d7bd7384a37c	487	static void
grzemich	0:d7bd7384a37c	488	lcp_protrej(int unit)
grzemich	0:d7bd7384a37c	489	{
grzemich	0:d7bd7384a37c	490	LWIP_UNUSED_ARG(unit);
grzemich	0:d7bd7384a37c	491	/*
grzemich	0:d7bd7384a37c	492	* Can't reject LCP!
grzemich	0:d7bd7384a37c	493	*/
grzemich	0:d7bd7384a37c	494	LCPDEBUG(LOG_WARNING, ("lcp_protrej: Received Protocol-Reject for LCP!\n"));
grzemich	0:d7bd7384a37c	495	fsm_protreject(&lcp_fsm[unit]);
grzemich	0:d7bd7384a37c	496	}
grzemich	0:d7bd7384a37c	497
grzemich	0:d7bd7384a37c	498
grzemich	0:d7bd7384a37c	499	/*
grzemich	0:d7bd7384a37c	500	* lcp_sprotrej - Send a Protocol-Reject for some protocol.
grzemich	0:d7bd7384a37c	501	*/
grzemich	0:d7bd7384a37c	502	void
grzemich	0:d7bd7384a37c	503	lcp_sprotrej(int unit, u_char *p, int len)
grzemich	0:d7bd7384a37c	504	{
grzemich	0:d7bd7384a37c	505	/*
grzemich	0:d7bd7384a37c	506	* Send back the protocol and the information field of the
grzemich	0:d7bd7384a37c	507	* rejected packet. We only get here if LCP is in the LS_OPENED state.
grzemich	0:d7bd7384a37c	508	*/
grzemich	0:d7bd7384a37c	509
grzemich	0:d7bd7384a37c	510	fsm_sdata(&lcp_fsm[unit], PROTREJ, ++lcp_fsm[unit].id, p, len);
grzemich	0:d7bd7384a37c	511	}
grzemich	0:d7bd7384a37c	512
grzemich	0:d7bd7384a37c	513
grzemich	0:d7bd7384a37c	514	/*
grzemich	0:d7bd7384a37c	515	* lcp_resetci - Reset our CI.
grzemich	0:d7bd7384a37c	516	*/
grzemich	0:d7bd7384a37c	517	static void
grzemich	0:d7bd7384a37c	518	lcp_resetci(fsm *f)
grzemich	0:d7bd7384a37c	519	{
grzemich	0:d7bd7384a37c	520	lcp_wantoptions[f->unit].magicnumber = magic();
grzemich	0:d7bd7384a37c	521	lcp_wantoptions[f->unit].numloops = 0;
grzemich	0:d7bd7384a37c	522	lcp_gotoptions[f->unit] = lcp_wantoptions[f->unit];
grzemich	0:d7bd7384a37c	523	peer_mru[f->unit] = PPP_MRU;
grzemich	0:d7bd7384a37c	524	auth_reset(f->unit);
grzemich	0:d7bd7384a37c	525	}
grzemich	0:d7bd7384a37c	526
grzemich	0:d7bd7384a37c	527
grzemich	0:d7bd7384a37c	528	/*
grzemich	0:d7bd7384a37c	529	* lcp_cilen - Return length of our CI.
grzemich	0:d7bd7384a37c	530	*/
grzemich	0:d7bd7384a37c	531	static int
grzemich	0:d7bd7384a37c	532	lcp_cilen(fsm *f)
grzemich	0:d7bd7384a37c	533	{
grzemich	0:d7bd7384a37c	534	lcp_options *go = &lcp_gotoptions[f->unit];
grzemich	0:d7bd7384a37c	535
grzemich	0:d7bd7384a37c	536	#define LENCIVOID(neg) ((neg) ? CILEN_VOID : 0)
grzemich	0:d7bd7384a37c	537	#define LENCICHAP(neg) ((neg) ? CILEN_CHAP : 0)
grzemich	0:d7bd7384a37c	538	#define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0)
grzemich	0:d7bd7384a37c	539	#define LENCILONG(neg) ((neg) ? CILEN_LONG : 0)
grzemich	0:d7bd7384a37c	540	#define LENCILQR(neg) ((neg) ? CILEN_LQR: 0)
grzemich	0:d7bd7384a37c	541	#define LENCICBCP(neg) ((neg) ? CILEN_CBCP: 0)
grzemich	0:d7bd7384a37c	542	/*
grzemich	0:d7bd7384a37c	543	* NB: we only ask for one of CHAP and UPAP, even if we will
grzemich	0:d7bd7384a37c	544	* accept either.
grzemich	0:d7bd7384a37c	545	*/
grzemich	0:d7bd7384a37c	546	return (LENCISHORT(go->neg_mru && go->mru != PPP_DEFMRU) +
grzemich	0:d7bd7384a37c	547	LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) +
grzemich	0:d7bd7384a37c	548	LENCICHAP(go->neg_chap) +
grzemich	0:d7bd7384a37c	549	LENCISHORT(!go->neg_chap && go->neg_upap) +
grzemich	0:d7bd7384a37c	550	LENCILQR(go->neg_lqr) +
grzemich	0:d7bd7384a37c	551	LENCICBCP(go->neg_cbcp) +
grzemich	0:d7bd7384a37c	552	LENCILONG(go->neg_magicnumber) +
grzemich	0:d7bd7384a37c	553	LENCIVOID(go->neg_pcompression) +
grzemich	0:d7bd7384a37c	554	LENCIVOID(go->neg_accompression));
grzemich	0:d7bd7384a37c	555	}
grzemich	0:d7bd7384a37c	556
grzemich	0:d7bd7384a37c	557
grzemich	0:d7bd7384a37c	558	/*
grzemich	0:d7bd7384a37c	559	* lcp_addci - Add our desired CIs to a packet.
grzemich	0:d7bd7384a37c	560	*/
grzemich	0:d7bd7384a37c	561	static void
grzemich	0:d7bd7384a37c	562	lcp_addci(fsm f, u_char ucp, int *lenp)
grzemich	0:d7bd7384a37c	563	{
grzemich	0:d7bd7384a37c	564	lcp_options *go = &lcp_gotoptions[f->unit];
grzemich	0:d7bd7384a37c	565	u_char *start_ucp = ucp;
grzemich	0:d7bd7384a37c	566
grzemich	0:d7bd7384a37c	567	#define ADDCIVOID(opt, neg) \
grzemich	0:d7bd7384a37c	568	if (neg) { \
grzemich	0:d7bd7384a37c	569	LCPDEBUG(LOG_INFO, ("lcp_addci: opt=%d\n", opt)); \
grzemich	0:d7bd7384a37c	570	PUTCHAR(opt, ucp); \
grzemich	0:d7bd7384a37c	571	PUTCHAR(CILEN_VOID, ucp); \
grzemich	0:d7bd7384a37c	572	}
grzemich	0:d7bd7384a37c	573	#define ADDCISHORT(opt, neg, val) \
grzemich	0:d7bd7384a37c	574	if (neg) { \
grzemich	0:d7bd7384a37c	575	LCPDEBUG(LOG_INFO, ("lcp_addci: INT opt=%d %X\n", opt, val)); \
grzemich	0:d7bd7384a37c	576	PUTCHAR(opt, ucp); \
grzemich	0:d7bd7384a37c	577	PUTCHAR(CILEN_SHORT, ucp); \
grzemich	0:d7bd7384a37c	578	PUTSHORT(val, ucp); \
grzemich	0:d7bd7384a37c	579	}
grzemich	0:d7bd7384a37c	580	#define ADDCICHAP(opt, neg, val, digest) \
grzemich	0:d7bd7384a37c	581	if (neg) { \
grzemich	0:d7bd7384a37c	582	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAP opt=%d %X\n", opt, val)); \
grzemich	0:d7bd7384a37c	583	PUTCHAR(opt, ucp); \
grzemich	0:d7bd7384a37c	584	PUTCHAR(CILEN_CHAP, ucp); \
grzemich	0:d7bd7384a37c	585	PUTSHORT(val, ucp); \
grzemich	0:d7bd7384a37c	586	PUTCHAR(digest, ucp); \
grzemich	0:d7bd7384a37c	587	}
grzemich	0:d7bd7384a37c	588	#define ADDCILONG(opt, neg, val) \
grzemich	0:d7bd7384a37c	589	if (neg) { \
grzemich	0:d7bd7384a37c	590	LCPDEBUG(LOG_INFO, ("lcp_addci: L opt=%d %lX\n", opt, val)); \
grzemich	0:d7bd7384a37c	591	PUTCHAR(opt, ucp); \
grzemich	0:d7bd7384a37c	592	PUTCHAR(CILEN_LONG, ucp); \
grzemich	0:d7bd7384a37c	593	PUTLONG(val, ucp); \
grzemich	0:d7bd7384a37c	594	}
grzemich	0:d7bd7384a37c	595	#define ADDCILQR(opt, neg, val) \
grzemich	0:d7bd7384a37c	596	if (neg) { \
grzemich	0:d7bd7384a37c	597	LCPDEBUG(LOG_INFO, ("lcp_addci: LQR opt=%d %lX\n", opt, val)); \
grzemich	0:d7bd7384a37c	598	PUTCHAR(opt, ucp); \
grzemich	0:d7bd7384a37c	599	PUTCHAR(CILEN_LQR, ucp); \
grzemich	0:d7bd7384a37c	600	PUTSHORT(PPP_LQR, ucp); \
grzemich	0:d7bd7384a37c	601	PUTLONG(val, ucp); \
grzemich	0:d7bd7384a37c	602	}
grzemich	0:d7bd7384a37c	603	#define ADDCICHAR(opt, neg, val) \
grzemich	0:d7bd7384a37c	604	if (neg) { \
grzemich	0:d7bd7384a37c	605	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAR opt=%d %X '%z'\n", opt, val, val)); \
grzemich	0:d7bd7384a37c	606	PUTCHAR(opt, ucp); \
grzemich	0:d7bd7384a37c	607	PUTCHAR(CILEN_CHAR, ucp); \
grzemich	0:d7bd7384a37c	608	PUTCHAR(val, ucp); \
grzemich	0:d7bd7384a37c	609	}
grzemich	0:d7bd7384a37c	610
grzemich	0:d7bd7384a37c	611	ADDCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
grzemich	0:d7bd7384a37c	612	ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
grzemich	0:d7bd7384a37c	613	ADDCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
grzemich	0:d7bd7384a37c	614	ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
grzemich	0:d7bd7384a37c	615	ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
grzemich	0:d7bd7384a37c	616	ADDCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
grzemich	0:d7bd7384a37c	617	ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
grzemich	0:d7bd7384a37c	618	ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
grzemich	0:d7bd7384a37c	619	ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
grzemich	0:d7bd7384a37c	620
grzemich	0:d7bd7384a37c	621	if (ucp - start_ucp != *lenp) {
grzemich	0:d7bd7384a37c	622	/* this should never happen, because peer_mtu should be 1500 */
grzemich	0:d7bd7384a37c	623	LCPDEBUG(LOG_ERR, ("Bug in lcp_addci: wrong length\n"));
grzemich	0:d7bd7384a37c	624	}
grzemich	0:d7bd7384a37c	625	}
grzemich	0:d7bd7384a37c	626
grzemich	0:d7bd7384a37c	627
grzemich	0:d7bd7384a37c	628	/*
grzemich	0:d7bd7384a37c	629	* lcp_ackci - Ack our CIs.
grzemich	0:d7bd7384a37c	630	* This should not modify any state if the Ack is bad.
grzemich	0:d7bd7384a37c	631	*
grzemich	0:d7bd7384a37c	632	* Returns:
grzemich	0:d7bd7384a37c	633	* 0 - Ack was bad.
grzemich	0:d7bd7384a37c	634	* 1 - Ack was good.
grzemich	0:d7bd7384a37c	635	*/
grzemich	0:d7bd7384a37c	636	static int
grzemich	0:d7bd7384a37c	637	lcp_ackci(fsm f, u_char p, int len)
grzemich	0:d7bd7384a37c	638	{
grzemich	0:d7bd7384a37c	639	lcp_options *go = &lcp_gotoptions[f->unit];
grzemich	0:d7bd7384a37c	640	u_char cilen, citype, cichar;
grzemich	0:d7bd7384a37c	641	u_short cishort;
grzemich	0:d7bd7384a37c	642	u32_t cilong;
grzemich	0:d7bd7384a37c	643
grzemich	0:d7bd7384a37c	644	/*
grzemich	0:d7bd7384a37c	645	* CIs must be in exactly the same order that we sent.
grzemich	0:d7bd7384a37c	646	* Check packet length and CI length at each step.
grzemich	0:d7bd7384a37c	647	* If we find any deviations, then this packet is bad.
grzemich	0:d7bd7384a37c	648	*/
grzemich	0:d7bd7384a37c	649	#define ACKCIVOID(opt, neg) \
grzemich	0:d7bd7384a37c	650	if (neg) { \
grzemich	0:d7bd7384a37c	651	if ((len -= CILEN_VOID) < 0) \
grzemich	0:d7bd7384a37c	652	goto bad; \
grzemich	0:d7bd7384a37c	653	GETCHAR(citype, p); \
grzemich	0:d7bd7384a37c	654	GETCHAR(cilen, p); \
grzemich	0:d7bd7384a37c	655	if (cilen != CILEN_VOID \|\| citype != opt) \
grzemich	0:d7bd7384a37c	656	goto bad; \
grzemich	0:d7bd7384a37c	657	}
grzemich	0:d7bd7384a37c	658	#define ACKCISHORT(opt, neg, val) \
grzemich	0:d7bd7384a37c	659	if (neg) { \
grzemich	0:d7bd7384a37c	660	if ((len -= CILEN_SHORT) < 0) \
grzemich	0:d7bd7384a37c	661	goto bad; \
grzemich	0:d7bd7384a37c	662	GETCHAR(citype, p); \
grzemich	0:d7bd7384a37c	663	GETCHAR(cilen, p); \
grzemich	0:d7bd7384a37c	664	if (cilen != CILEN_SHORT \|\| citype != opt) \
grzemich	0:d7bd7384a37c	665	goto bad; \
grzemich	0:d7bd7384a37c	666	GETSHORT(cishort, p); \
grzemich	0:d7bd7384a37c	667	if (cishort != val) \
grzemich	0:d7bd7384a37c	668	goto bad; \
grzemich	0:d7bd7384a37c	669	}
grzemich	0:d7bd7384a37c	670	#define ACKCICHAR(opt, neg, val) \
grzemich	0:d7bd7384a37c	671	if (neg) { \
grzemich	0:d7bd7384a37c	672	if ((len -= CILEN_CHAR) < 0) \
grzemich	0:d7bd7384a37c	673	goto bad; \
grzemich	0:d7bd7384a37c	674	GETCHAR(citype, p); \
grzemich	0:d7bd7384a37c	675	GETCHAR(cilen, p); \
grzemich	0:d7bd7384a37c	676	if (cilen != CILEN_CHAR \|\| citype != opt) \
grzemich	0:d7bd7384a37c	677	goto bad; \
grzemich	0:d7bd7384a37c	678	GETCHAR(cichar, p); \
grzemich	0:d7bd7384a37c	679	if (cichar != val) \
grzemich	0:d7bd7384a37c	680	goto bad; \
grzemich	0:d7bd7384a37c	681	}
grzemich	0:d7bd7384a37c	682	#define ACKCICHAP(opt, neg, val, digest) \
grzemich	0:d7bd7384a37c	683	if (neg) { \
grzemich	0:d7bd7384a37c	684	if ((len -= CILEN_CHAP) < 0) \
grzemich	0:d7bd7384a37c	685	goto bad; \
grzemich	0:d7bd7384a37c	686	GETCHAR(citype, p); \
grzemich	0:d7bd7384a37c	687	GETCHAR(cilen, p); \
grzemich	0:d7bd7384a37c	688	if (cilen != CILEN_CHAP \|\| citype != opt) \
grzemich	0:d7bd7384a37c	689	goto bad; \
grzemich	0:d7bd7384a37c	690	GETSHORT(cishort, p); \
grzemich	0:d7bd7384a37c	691	if (cishort != val) \
grzemich	0:d7bd7384a37c	692	goto bad; \
grzemich	0:d7bd7384a37c	693	GETCHAR(cichar, p); \
grzemich	0:d7bd7384a37c	694	if (cichar != digest) \
grzemich	0:d7bd7384a37c	695	goto bad; \
grzemich	0:d7bd7384a37c	696	}
grzemich	0:d7bd7384a37c	697	#define ACKCILONG(opt, neg, val) \
grzemich	0:d7bd7384a37c	698	if (neg) { \
grzemich	0:d7bd7384a37c	699	if ((len -= CILEN_LONG) < 0) \
grzemich	0:d7bd7384a37c	700	goto bad; \
grzemich	0:d7bd7384a37c	701	GETCHAR(citype, p); \
grzemich	0:d7bd7384a37c	702	GETCHAR(cilen, p); \
grzemich	0:d7bd7384a37c	703	if (cilen != CILEN_LONG \|\| citype != opt) \
grzemich	0:d7bd7384a37c	704	goto bad; \
grzemich	0:d7bd7384a37c	705	GETLONG(cilong, p); \
grzemich	0:d7bd7384a37c	706	if (cilong != val) \
grzemich	0:d7bd7384a37c	707	goto bad; \
grzemich	0:d7bd7384a37c	708	}
grzemich	0:d7bd7384a37c	709	#define ACKCILQR(opt, neg, val) \
grzemich	0:d7bd7384a37c	710	if (neg) { \
grzemich	0:d7bd7384a37c	711	if ((len -= CILEN_LQR) < 0) \
grzemich	0:d7bd7384a37c	712	goto bad; \
grzemich	0:d7bd7384a37c	713	GETCHAR(citype, p); \
grzemich	0:d7bd7384a37c	714	GETCHAR(cilen, p); \
grzemich	0:d7bd7384a37c	715	if (cilen != CILEN_LQR \|\| citype != opt) \
grzemich	0:d7bd7384a37c	716	goto bad; \
grzemich	0:d7bd7384a37c	717	GETSHORT(cishort, p); \
grzemich	0:d7bd7384a37c	718	if (cishort != PPP_LQR) \
grzemich	0:d7bd7384a37c	719	goto bad; \
grzemich	0:d7bd7384a37c	720	GETLONG(cilong, p); \
grzemich	0:d7bd7384a37c	721	if (cilong != val) \
grzemich	0:d7bd7384a37c	722	goto bad; \
grzemich	0:d7bd7384a37c	723	}
grzemich	0:d7bd7384a37c	724
grzemich	0:d7bd7384a37c	725	ACKCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
grzemich	0:d7bd7384a37c	726	ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
grzemich	0:d7bd7384a37c	727	ACKCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
grzemich	0:d7bd7384a37c	728	ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
grzemich	0:d7bd7384a37c	729	ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
grzemich	0:d7bd7384a37c	730	ACKCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
grzemich	0:d7bd7384a37c	731	ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
grzemich	0:d7bd7384a37c	732	ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
grzemich	0:d7bd7384a37c	733	ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
grzemich	0:d7bd7384a37c	734
grzemich	0:d7bd7384a37c	735	/*
grzemich	0:d7bd7384a37c	736	* If there are any remaining CIs, then this packet is bad.
grzemich	0:d7bd7384a37c	737	*/
grzemich	0:d7bd7384a37c	738	if (len != 0) {
grzemich	0:d7bd7384a37c	739	goto bad;
grzemich	0:d7bd7384a37c	740	}
grzemich	0:d7bd7384a37c	741	LCPDEBUG(LOG_INFO, ("lcp_acki: Ack\n"));
grzemich	0:d7bd7384a37c	742	return (1);
grzemich	0:d7bd7384a37c	743	bad:
grzemich	0:d7bd7384a37c	744	LCPDEBUG(LOG_WARNING, ("lcp_acki: received bad Ack!\n"));
grzemich	0:d7bd7384a37c	745	return (0);
grzemich	0:d7bd7384a37c	746	}
grzemich	0:d7bd7384a37c	747
grzemich	0:d7bd7384a37c	748
grzemich	0:d7bd7384a37c	749	/*
grzemich	0:d7bd7384a37c	750	* lcp_nakci - Peer has sent a NAK for some of our CIs.
grzemich	0:d7bd7384a37c	751	* This should not modify any state if the Nak is bad
grzemich	0:d7bd7384a37c	752	* or if LCP is in the LS_OPENED state.
grzemich	0:d7bd7384a37c	753	*
grzemich	0:d7bd7384a37c	754	* Returns:
grzemich	0:d7bd7384a37c	755	* 0 - Nak was bad.
grzemich	0:d7bd7384a37c	756	* 1 - Nak was good.
grzemich	0:d7bd7384a37c	757	*/
grzemich	0:d7bd7384a37c	758	static int
grzemich	0:d7bd7384a37c	759	lcp_nakci(fsm f, u_char p, int len)
grzemich	0:d7bd7384a37c	760	{
grzemich	0:d7bd7384a37c	761	lcp_options *go = &lcp_gotoptions[f->unit];
grzemich	0:d7bd7384a37c	762	lcp_options *wo = &lcp_wantoptions[f->unit];
grzemich	0:d7bd7384a37c	763	u_char citype, cichar, *next;
grzemich	0:d7bd7384a37c	764	u_short cishort;
grzemich	0:d7bd7384a37c	765	u32_t cilong;
grzemich	0:d7bd7384a37c	766	lcp_options no; /* options we've seen Naks for */
grzemich	0:d7bd7384a37c	767	lcp_options try; /* options to request next time */
grzemich	0:d7bd7384a37c	768	int looped_back = 0;
grzemich	0:d7bd7384a37c	769	int cilen;
grzemich	0:d7bd7384a37c	770
grzemich	0:d7bd7384a37c	771	BZERO(&no, sizeof(no));
grzemich	0:d7bd7384a37c	772	try = *go;
grzemich	0:d7bd7384a37c	773
grzemich	0:d7bd7384a37c	774	/*
grzemich	0:d7bd7384a37c	775	* Any Nak'd CIs must be in exactly the same order that we sent.
grzemich	0:d7bd7384a37c	776	* Check packet length and CI length at each step.
grzemich	0:d7bd7384a37c	777	* If we find any deviations, then this packet is bad.
grzemich	0:d7bd7384a37c	778	*/
grzemich	0:d7bd7384a37c	779	#define NAKCIVOID(opt, neg, code) \
grzemich	0:d7bd7384a37c	780	if (go->neg && \
grzemich	0:d7bd7384a37c	781	len >= CILEN_VOID && \
grzemich	0:d7bd7384a37c	782	p[1] == CILEN_VOID && \
grzemich	0:d7bd7384a37c	783	p[0] == opt) { \
grzemich	0:d7bd7384a37c	784	len -= CILEN_VOID; \
grzemich	0:d7bd7384a37c	785	INCPTR(CILEN_VOID, p); \
grzemich	0:d7bd7384a37c	786	no.neg = 1; \
grzemich	0:d7bd7384a37c	787	code \
grzemich	0:d7bd7384a37c	788	}
grzemich	0:d7bd7384a37c	789	#define NAKCICHAP(opt, neg, code) \
grzemich	0:d7bd7384a37c	790	if (go->neg && \
grzemich	0:d7bd7384a37c	791	len >= CILEN_CHAP && \
grzemich	0:d7bd7384a37c	792	p[1] == CILEN_CHAP && \
grzemich	0:d7bd7384a37c	793	p[0] == opt) { \
grzemich	0:d7bd7384a37c	794	len -= CILEN_CHAP; \
grzemich	0:d7bd7384a37c	795	INCPTR(2, p); \
grzemich	0:d7bd7384a37c	796	GETSHORT(cishort, p); \
grzemich	0:d7bd7384a37c	797	GETCHAR(cichar, p); \
grzemich	0:d7bd7384a37c	798	no.neg = 1; \
grzemich	0:d7bd7384a37c	799	code \
grzemich	0:d7bd7384a37c	800	}
grzemich	0:d7bd7384a37c	801	#define NAKCICHAR(opt, neg, code) \
grzemich	0:d7bd7384a37c	802	if (go->neg && \
grzemich	0:d7bd7384a37c	803	len >= CILEN_CHAR && \
grzemich	0:d7bd7384a37c	804	p[1] == CILEN_CHAR && \
grzemich	0:d7bd7384a37c	805	p[0] == opt) { \
grzemich	0:d7bd7384a37c	806	len -= CILEN_CHAR; \
grzemich	0:d7bd7384a37c	807	INCPTR(2, p); \
grzemich	0:d7bd7384a37c	808	GETCHAR(cichar, p); \
grzemich	0:d7bd7384a37c	809	no.neg = 1; \
grzemich	0:d7bd7384a37c	810	code \
grzemich	0:d7bd7384a37c	811	}
grzemich	0:d7bd7384a37c	812	#define NAKCISHORT(opt, neg, code) \
grzemich	0:d7bd7384a37c	813	if (go->neg && \
grzemich	0:d7bd7384a37c	814	len >= CILEN_SHORT && \
grzemich	0:d7bd7384a37c	815	p[1] == CILEN_SHORT && \
grzemich	0:d7bd7384a37c	816	p[0] == opt) { \
grzemich	0:d7bd7384a37c	817	len -= CILEN_SHORT; \
grzemich	0:d7bd7384a37c	818	INCPTR(2, p); \
grzemich	0:d7bd7384a37c	819	GETSHORT(cishort, p); \
grzemich	0:d7bd7384a37c	820	no.neg = 1; \
grzemich	0:d7bd7384a37c	821	code \
grzemich	0:d7bd7384a37c	822	}
grzemich	0:d7bd7384a37c	823	#define NAKCILONG(opt, neg, code) \
grzemich	0:d7bd7384a37c	824	if (go->neg && \
grzemich	0:d7bd7384a37c	825	len >= CILEN_LONG && \
grzemich	0:d7bd7384a37c	826	p[1] == CILEN_LONG && \
grzemich	0:d7bd7384a37c	827	p[0] == opt) { \
grzemich	0:d7bd7384a37c	828	len -= CILEN_LONG; \
grzemich	0:d7bd7384a37c	829	INCPTR(2, p); \
grzemich	0:d7bd7384a37c	830	GETLONG(cilong, p); \
grzemich	0:d7bd7384a37c	831	no.neg = 1; \
grzemich	0:d7bd7384a37c	832	code \
grzemich	0:d7bd7384a37c	833	}
grzemich	0:d7bd7384a37c	834	#define NAKCILQR(opt, neg, code) \
grzemich	0:d7bd7384a37c	835	if (go->neg && \
grzemich	0:d7bd7384a37c	836	len >= CILEN_LQR && \
grzemich	0:d7bd7384a37c	837	p[1] == CILEN_LQR && \
grzemich	0:d7bd7384a37c	838	p[0] == opt) { \
grzemich	0:d7bd7384a37c	839	len -= CILEN_LQR; \
grzemich	0:d7bd7384a37c	840	INCPTR(2, p); \
grzemich	0:d7bd7384a37c	841	GETSHORT(cishort, p); \
grzemich	0:d7bd7384a37c	842	GETLONG(cilong, p); \
grzemich	0:d7bd7384a37c	843	no.neg = 1; \
grzemich	0:d7bd7384a37c	844	code \
grzemich	0:d7bd7384a37c	845	}
grzemich	0:d7bd7384a37c	846
grzemich	0:d7bd7384a37c	847	/*
grzemich	0:d7bd7384a37c	848	* We don't care if they want to send us smaller packets than
grzemich	0:d7bd7384a37c	849	* we want. Therefore, accept any MRU less than what we asked for,
grzemich	0:d7bd7384a37c	850	* but then ignore the new value when setting the MRU in the kernel.
grzemich	0:d7bd7384a37c	851	* If they send us a bigger MRU than what we asked, accept it, up to
grzemich	0:d7bd7384a37c	852	* the limit of the default MRU we'd get if we didn't negotiate.
grzemich	0:d7bd7384a37c	853	*/
grzemich	0:d7bd7384a37c	854	if (go->neg_mru && go->mru != PPP_DEFMRU) {
grzemich	0:d7bd7384a37c	855	NAKCISHORT(CI_MRU, neg_mru,
grzemich	0:d7bd7384a37c	856	if (cishort <= wo->mru \|\| cishort < PPP_DEFMRU) {
grzemich	0:d7bd7384a37c	857	try.mru = cishort;
grzemich	0:d7bd7384a37c	858	}
grzemich	0:d7bd7384a37c	859	);
grzemich	0:d7bd7384a37c	860	}
grzemich	0:d7bd7384a37c	861
grzemich	0:d7bd7384a37c	862	/*
grzemich	0:d7bd7384a37c	863	* Add any characters they want to our (receive-side) asyncmap.
grzemich	0:d7bd7384a37c	864	*/
grzemich	0:d7bd7384a37c	865	if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) {
grzemich	0:d7bd7384a37c	866	NAKCILONG(CI_ASYNCMAP, neg_asyncmap,
grzemich	0:d7bd7384a37c	867	try.asyncmap = go->asyncmap \| cilong;
grzemich	0:d7bd7384a37c	868	);
grzemich	0:d7bd7384a37c	869	}
grzemich	0:d7bd7384a37c	870
grzemich	0:d7bd7384a37c	871	/*
grzemich	0:d7bd7384a37c	872	* If they've nak'd our authentication-protocol, check whether
grzemich	0:d7bd7384a37c	873	* they are proposing a different protocol, or a different
grzemich	0:d7bd7384a37c	874	* hash algorithm for CHAP.
grzemich	0:d7bd7384a37c	875	*/
grzemich	0:d7bd7384a37c	876	if ((go->neg_chap \|\| go->neg_upap)
grzemich	0:d7bd7384a37c	877	&& len >= CILEN_SHORT
grzemich	0:d7bd7384a37c	878	&& p[0] == CI_AUTHTYPE && p[1] >= CILEN_SHORT && p[1] <= len) {
grzemich	0:d7bd7384a37c	879	cilen = p[1];
grzemich	0:d7bd7384a37c	880	len -= cilen;
grzemich	0:d7bd7384a37c	881	no.neg_chap = go->neg_chap;
grzemich	0:d7bd7384a37c	882	no.neg_upap = go->neg_upap;
grzemich	0:d7bd7384a37c	883	INCPTR(2, p);
grzemich	0:d7bd7384a37c	884	GETSHORT(cishort, p);
grzemich	0:d7bd7384a37c	885	if (cishort == PPP_PAP && cilen == CILEN_SHORT) {
grzemich	0:d7bd7384a37c	886	/*
grzemich	0:d7bd7384a37c	887	* If we were asking for CHAP, they obviously don't want to do it.
grzemich	0:d7bd7384a37c	888	* If we weren't asking for CHAP, then we were asking for PAP,
grzemich	0:d7bd7384a37c	889	* in which case this Nak is bad.
grzemich	0:d7bd7384a37c	890	*/
grzemich	0:d7bd7384a37c	891	if (!go->neg_chap) {
grzemich	0:d7bd7384a37c	892	goto bad;
grzemich	0:d7bd7384a37c	893	}
grzemich	0:d7bd7384a37c	894	try.neg_chap = 0;
grzemich	0:d7bd7384a37c	895
grzemich	0:d7bd7384a37c	896	} else if (cishort == PPP_CHAP && cilen == CILEN_CHAP) {
grzemich	0:d7bd7384a37c	897	GETCHAR(cichar, p);
grzemich	0:d7bd7384a37c	898	if (go->neg_chap) {
grzemich	0:d7bd7384a37c	899	/*
grzemich	0:d7bd7384a37c	900	* We were asking for CHAP/MD5; they must want a different
grzemich	0:d7bd7384a37c	901	* algorithm. If they can't do MD5, we'll have to stop
grzemich	0:d7bd7384a37c	902	* asking for CHAP.
grzemich	0:d7bd7384a37c	903	*/
grzemich	0:d7bd7384a37c	904	if (cichar != go->chap_mdtype) {
grzemich	0:d7bd7384a37c	905	try.neg_chap = 0;
grzemich	0:d7bd7384a37c	906	}
grzemich	0:d7bd7384a37c	907	} else {
grzemich	0:d7bd7384a37c	908	/*
grzemich	0:d7bd7384a37c	909	* Stop asking for PAP if we were asking for it.
grzemich	0:d7bd7384a37c	910	*/
grzemich	0:d7bd7384a37c	911	try.neg_upap = 0;
grzemich	0:d7bd7384a37c	912	}
grzemich	0:d7bd7384a37c	913
grzemich	0:d7bd7384a37c	914	} else {
grzemich	0:d7bd7384a37c	915	/*
grzemich	0:d7bd7384a37c	916	* We don't recognize what they're suggesting.
grzemich	0:d7bd7384a37c	917	* Stop asking for what we were asking for.
grzemich	0:d7bd7384a37c	918	*/
grzemich	0:d7bd7384a37c	919	if (go->neg_chap) {
grzemich	0:d7bd7384a37c	920	try.neg_chap = 0;
grzemich	0:d7bd7384a37c	921	} else {
grzemich	0:d7bd7384a37c	922	try.neg_upap = 0;
grzemich	0:d7bd7384a37c	923	}
grzemich	0:d7bd7384a37c	924	p += cilen - CILEN_SHORT;
grzemich	0:d7bd7384a37c	925	}
grzemich	0:d7bd7384a37c	926	}
grzemich	0:d7bd7384a37c	927
grzemich	0:d7bd7384a37c	928	/*
grzemich	0:d7bd7384a37c	929	* If they can't cope with our link quality protocol, we'll have
grzemich	0:d7bd7384a37c	930	* to stop asking for LQR. We haven't got any other protocol.
grzemich	0:d7bd7384a37c	931	* If they Nak the reporting period, take their value XXX ?
grzemich	0:d7bd7384a37c	932	*/
grzemich	0:d7bd7384a37c	933	NAKCILQR(CI_QUALITY, neg_lqr,
grzemich	0:d7bd7384a37c	934	if (cishort != PPP_LQR) {
grzemich	0:d7bd7384a37c	935	try.neg_lqr = 0;
grzemich	0:d7bd7384a37c	936	} else {
grzemich	0:d7bd7384a37c	937	try.lqr_period = cilong;
grzemich	0:d7bd7384a37c	938	}
grzemich	0:d7bd7384a37c	939	);
grzemich	0:d7bd7384a37c	940
grzemich	0:d7bd7384a37c	941	/*
grzemich	0:d7bd7384a37c	942	* Only implementing CBCP...not the rest of the callback options
grzemich	0:d7bd7384a37c	943	*/
grzemich	0:d7bd7384a37c	944	NAKCICHAR(CI_CALLBACK, neg_cbcp,
grzemich	0:d7bd7384a37c	945	try.neg_cbcp = 0;
grzemich	0:d7bd7384a37c	946	);
grzemich	0:d7bd7384a37c	947
grzemich	0:d7bd7384a37c	948	/*
grzemich	0:d7bd7384a37c	949	* Check for a looped-back line.
grzemich	0:d7bd7384a37c	950	*/
grzemich	0:d7bd7384a37c	951	NAKCILONG(CI_MAGICNUMBER, neg_magicnumber,
grzemich	0:d7bd7384a37c	952	try.magicnumber = magic();
grzemich	0:d7bd7384a37c	953	looped_back = 1;
grzemich	0:d7bd7384a37c	954	);
grzemich	0:d7bd7384a37c	955
grzemich	0:d7bd7384a37c	956	/*
grzemich	0:d7bd7384a37c	957	* Peer shouldn't send Nak for protocol compression or
grzemich	0:d7bd7384a37c	958	* address/control compression requests; they should send
grzemich	0:d7bd7384a37c	959	* a Reject instead. If they send a Nak, treat it as a Reject.
grzemich	0:d7bd7384a37c	960	*/
grzemich	0:d7bd7384a37c	961	NAKCIVOID(CI_PCOMPRESSION, neg_pcompression,
grzemich	0:d7bd7384a37c	962	try.neg_pcompression = 0;
grzemich	0:d7bd7384a37c	963	);
grzemich	0:d7bd7384a37c	964	NAKCIVOID(CI_ACCOMPRESSION, neg_accompression,
grzemich	0:d7bd7384a37c	965	try.neg_accompression = 0;
grzemich	0:d7bd7384a37c	966	);
grzemich	0:d7bd7384a37c	967
grzemich	0:d7bd7384a37c	968	/*
grzemich	0:d7bd7384a37c	969	* There may be remaining CIs, if the peer is requesting negotiation
grzemich	0:d7bd7384a37c	970	* on an option that we didn't include in our request packet.
grzemich	0:d7bd7384a37c	971	* If we see an option that we requested, or one we've already seen
grzemich	0:d7bd7384a37c	972	* in this packet, then this packet is bad.
grzemich	0:d7bd7384a37c	973	* If we wanted to respond by starting to negotiate on the requested
grzemich	0:d7bd7384a37c	974	* option(s), we could, but we don't, because except for the
grzemich	0:d7bd7384a37c	975	* authentication type and quality protocol, if we are not negotiating
grzemich	0:d7bd7384a37c	976	* an option, it is because we were told not to.
grzemich	0:d7bd7384a37c	977	* For the authentication type, the Nak from the peer means
grzemich	0:d7bd7384a37c	978	* `let me authenticate myself with you' which is a bit pointless.
grzemich	0:d7bd7384a37c	979	* For the quality protocol, the Nak means `ask me to send you quality
grzemich	0:d7bd7384a37c	980	* reports', but if we didn't ask for them, we don't want them.
grzemich	0:d7bd7384a37c	981	* An option we don't recognize represents the peer asking to
grzemich	0:d7bd7384a37c	982	* negotiate some option we don't support, so ignore it.
grzemich	0:d7bd7384a37c	983	*/
grzemich	0:d7bd7384a37c	984	while (len > CILEN_VOID) {
grzemich	0:d7bd7384a37c	985	GETCHAR(citype, p);
grzemich	0:d7bd7384a37c	986	GETCHAR(cilen, p);
grzemich	0:d7bd7384a37c	987	if (cilen < CILEN_VOID \|\| (len -= cilen) < 0) {
grzemich	0:d7bd7384a37c	988	goto bad;
grzemich	0:d7bd7384a37c	989	}
grzemich	0:d7bd7384a37c	990	next = p + cilen - 2;
grzemich	0:d7bd7384a37c	991
grzemich	0:d7bd7384a37c	992	switch (citype) {
grzemich	0:d7bd7384a37c	993	case CI_MRU:
grzemich	0:d7bd7384a37c	994	if ((go->neg_mru && go->mru != PPP_DEFMRU)
grzemich	0:d7bd7384a37c	995	\|\| no.neg_mru \|\| cilen != CILEN_SHORT) {
grzemich	0:d7bd7384a37c	996	goto bad;
grzemich	0:d7bd7384a37c	997	}
grzemich	0:d7bd7384a37c	998	GETSHORT(cishort, p);
grzemich	0:d7bd7384a37c	999	if (cishort < PPP_DEFMRU) {
grzemich	0:d7bd7384a37c	1000	try.mru = cishort;
grzemich	0:d7bd7384a37c	1001	}
grzemich	0:d7bd7384a37c	1002	break;
grzemich	0:d7bd7384a37c	1003	case CI_ASYNCMAP:
grzemich	0:d7bd7384a37c	1004	if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl)
grzemich	0:d7bd7384a37c	1005	\|\| no.neg_asyncmap \|\| cilen != CILEN_LONG) {
grzemich	0:d7bd7384a37c	1006	goto bad;
grzemich	0:d7bd7384a37c	1007	}
grzemich	0:d7bd7384a37c	1008	break;
grzemich	0:d7bd7384a37c	1009	case CI_AUTHTYPE:
grzemich	0:d7bd7384a37c	1010	if (go->neg_chap \|\| no.neg_chap \|\| go->neg_upap \|\| no.neg_upap) {
grzemich	0:d7bd7384a37c	1011	goto bad;
grzemich	0:d7bd7384a37c	1012	}
grzemich	0:d7bd7384a37c	1013	break;
grzemich	0:d7bd7384a37c	1014	case CI_MAGICNUMBER:
grzemich	0:d7bd7384a37c	1015	if (go->neg_magicnumber \|\| no.neg_magicnumber \|\|
grzemich	0:d7bd7384a37c	1016	cilen != CILEN_LONG) {
grzemich	0:d7bd7384a37c	1017	goto bad;
grzemich	0:d7bd7384a37c	1018	}
grzemich	0:d7bd7384a37c	1019	break;
grzemich	0:d7bd7384a37c	1020	case CI_PCOMPRESSION:
grzemich	0:d7bd7384a37c	1021	if (go->neg_pcompression \|\| no.neg_pcompression
grzemich	0:d7bd7384a37c	1022	\|\| cilen != CILEN_VOID) {
grzemich	0:d7bd7384a37c	1023	goto bad;
grzemich	0:d7bd7384a37c	1024	}
grzemich	0:d7bd7384a37c	1025	break;
grzemich	0:d7bd7384a37c	1026	case CI_ACCOMPRESSION:
grzemich	0:d7bd7384a37c	1027	if (go->neg_accompression \|\| no.neg_accompression
grzemich	0:d7bd7384a37c	1028	\|\| cilen != CILEN_VOID) {
grzemich	0:d7bd7384a37c	1029	goto bad;
grzemich	0:d7bd7384a37c	1030	}
grzemich	0:d7bd7384a37c	1031	break;
grzemich	0:d7bd7384a37c	1032	case CI_QUALITY:
grzemich	0:d7bd7384a37c	1033	if (go->neg_lqr \|\| no.neg_lqr \|\| cilen != CILEN_LQR) {
grzemich	0:d7bd7384a37c	1034	goto bad;
grzemich	0:d7bd7384a37c	1035	}
grzemich	0:d7bd7384a37c	1036	break;
grzemich	0:d7bd7384a37c	1037	}
grzemich	0:d7bd7384a37c	1038	p = next;
grzemich	0:d7bd7384a37c	1039	}
grzemich	0:d7bd7384a37c	1040
grzemich	0:d7bd7384a37c	1041	/* If there is still anything left, this packet is bad. */
grzemich	0:d7bd7384a37c	1042	if (len != 0) {
grzemich	0:d7bd7384a37c	1043	goto bad;
grzemich	0:d7bd7384a37c	1044	}
grzemich	0:d7bd7384a37c	1045
grzemich	0:d7bd7384a37c	1046	/*
grzemich	0:d7bd7384a37c	1047	* OK, the Nak is good. Now we can update state.
grzemich	0:d7bd7384a37c	1048	*/
grzemich	0:d7bd7384a37c	1049	if (f->state != LS_OPENED) {
grzemich	0:d7bd7384a37c	1050	if (looped_back) {
grzemich	0:d7bd7384a37c	1051	if (++try.numloops >= lcp_loopbackfail) {
grzemich	0:d7bd7384a37c	1052	LCPDEBUG(LOG_NOTICE, ("Serial line is looped back.\n"));
grzemich	0:d7bd7384a37c	1053	lcp_close(f->unit, "Loopback detected");
grzemich	0:d7bd7384a37c	1054	}
grzemich	0:d7bd7384a37c	1055	} else {
grzemich	0:d7bd7384a37c	1056	try.numloops = 0;
grzemich	0:d7bd7384a37c	1057	}
grzemich	0:d7bd7384a37c	1058	*go = try;
grzemich	0:d7bd7384a37c	1059	}
grzemich	0:d7bd7384a37c	1060
grzemich	0:d7bd7384a37c	1061	return 1;
grzemich	0:d7bd7384a37c	1062
grzemich	0:d7bd7384a37c	1063	bad:
grzemich	0:d7bd7384a37c	1064	LCPDEBUG(LOG_WARNING, ("lcp_nakci: received bad Nak!\n"));
grzemich	0:d7bd7384a37c	1065	return 0;
grzemich	0:d7bd7384a37c	1066	}
grzemich	0:d7bd7384a37c	1067
grzemich	0:d7bd7384a37c	1068
grzemich	0:d7bd7384a37c	1069	/*
grzemich	0:d7bd7384a37c	1070	* lcp_rejci - Peer has Rejected some of our CIs.
grzemich	0:d7bd7384a37c	1071	* This should not modify any state if the Reject is bad
grzemich	0:d7bd7384a37c	1072	* or if LCP is in the LS_OPENED state.
grzemich	0:d7bd7384a37c	1073	*
grzemich	0:d7bd7384a37c	1074	* Returns:
grzemich	0:d7bd7384a37c	1075	* 0 - Reject was bad.
grzemich	0:d7bd7384a37c	1076	* 1 - Reject was good.
grzemich	0:d7bd7384a37c	1077	*/
grzemich	0:d7bd7384a37c	1078	static int
grzemich	0:d7bd7384a37c	1079	lcp_rejci(fsm f, u_char p, int len)
grzemich	0:d7bd7384a37c	1080	{
grzemich	0:d7bd7384a37c	1081	lcp_options *go = &lcp_gotoptions[f->unit];
grzemich	0:d7bd7384a37c	1082	u_char cichar;
grzemich	0:d7bd7384a37c	1083	u_short cishort;
grzemich	0:d7bd7384a37c	1084	u32_t cilong;
grzemich	0:d7bd7384a37c	1085	lcp_options try; /* options to request next time */
grzemich	0:d7bd7384a37c	1086
grzemich	0:d7bd7384a37c	1087	try = *go;
grzemich	0:d7bd7384a37c	1088
grzemich	0:d7bd7384a37c	1089	/*
grzemich	0:d7bd7384a37c	1090	* Any Rejected CIs must be in exactly the same order that we sent.
grzemich	0:d7bd7384a37c	1091	* Check packet length and CI length at each step.
grzemich	0:d7bd7384a37c	1092	* If we find any deviations, then this packet is bad.
grzemich	0:d7bd7384a37c	1093	*/
grzemich	0:d7bd7384a37c	1094	#define REJCIVOID(opt, neg) \
grzemich	0:d7bd7384a37c	1095	if (go->neg && \
grzemich	0:d7bd7384a37c	1096	len >= CILEN_VOID && \
grzemich	0:d7bd7384a37c	1097	p[1] == CILEN_VOID && \
grzemich	0:d7bd7384a37c	1098	p[0] == opt) { \
grzemich	0:d7bd7384a37c	1099	len -= CILEN_VOID; \
grzemich	0:d7bd7384a37c	1100	INCPTR(CILEN_VOID, p); \
grzemich	0:d7bd7384a37c	1101	try.neg = 0; \
grzemich	0:d7bd7384a37c	1102	LCPDEBUG(LOG_INFO, ("lcp_rejci: void opt %d rejected\n", opt)); \
grzemich	0:d7bd7384a37c	1103	}
grzemich	0:d7bd7384a37c	1104	#define REJCISHORT(opt, neg, val) \
grzemich	0:d7bd7384a37c	1105	if (go->neg && \
grzemich	0:d7bd7384a37c	1106	len >= CILEN_SHORT && \
grzemich	0:d7bd7384a37c	1107	p[1] == CILEN_SHORT && \
grzemich	0:d7bd7384a37c	1108	p[0] == opt) { \
grzemich	0:d7bd7384a37c	1109	len -= CILEN_SHORT; \
grzemich	0:d7bd7384a37c	1110	INCPTR(2, p); \
grzemich	0:d7bd7384a37c	1111	GETSHORT(cishort, p); \
grzemich	0:d7bd7384a37c	1112	/* Check rejected value. */ \
grzemich	0:d7bd7384a37c	1113	if (cishort != val) { \
grzemich	0:d7bd7384a37c	1114	goto bad; \
grzemich	0:d7bd7384a37c	1115	} \
grzemich	0:d7bd7384a37c	1116	try.neg = 0; \
grzemich	0:d7bd7384a37c	1117	LCPDEBUG(LOG_INFO, ("lcp_rejci: short opt %d rejected\n", opt)); \
grzemich	0:d7bd7384a37c	1118	}
grzemich	0:d7bd7384a37c	1119	#define REJCICHAP(opt, neg, val, digest) \
grzemich	0:d7bd7384a37c	1120	if (go->neg && \
grzemich	0:d7bd7384a37c	1121	len >= CILEN_CHAP && \
grzemich	0:d7bd7384a37c	1122	p[1] == CILEN_CHAP && \
grzemich	0:d7bd7384a37c	1123	p[0] == opt) { \
grzemich	0:d7bd7384a37c	1124	len -= CILEN_CHAP; \
grzemich	0:d7bd7384a37c	1125	INCPTR(2, p); \
grzemich	0:d7bd7384a37c	1126	GETSHORT(cishort, p); \
grzemich	0:d7bd7384a37c	1127	GETCHAR(cichar, p); \
grzemich	0:d7bd7384a37c	1128	/* Check rejected value. */ \
grzemich	0:d7bd7384a37c	1129	if (cishort != val \|\| cichar != digest) { \
grzemich	0:d7bd7384a37c	1130	goto bad; \
grzemich	0:d7bd7384a37c	1131	} \
grzemich	0:d7bd7384a37c	1132	try.neg = 0; \
grzemich	0:d7bd7384a37c	1133	try.neg_upap = 0; \
grzemich	0:d7bd7384a37c	1134	LCPDEBUG(LOG_INFO, ("lcp_rejci: chap opt %d rejected\n", opt)); \
grzemich	0:d7bd7384a37c	1135	}
grzemich	0:d7bd7384a37c	1136	#define REJCILONG(opt, neg, val) \
grzemich	0:d7bd7384a37c	1137	if (go->neg && \
grzemich	0:d7bd7384a37c	1138	len >= CILEN_LONG && \
grzemich	0:d7bd7384a37c	1139	p[1] == CILEN_LONG && \
grzemich	0:d7bd7384a37c	1140	p[0] == opt) { \
grzemich	0:d7bd7384a37c	1141	len -= CILEN_LONG; \
grzemich	0:d7bd7384a37c	1142	INCPTR(2, p); \
grzemich	0:d7bd7384a37c	1143	GETLONG(cilong, p); \
grzemich	0:d7bd7384a37c	1144	/* Check rejected value. */ \
grzemich	0:d7bd7384a37c	1145	if (cilong != val) { \
grzemich	0:d7bd7384a37c	1146	goto bad; \
grzemich	0:d7bd7384a37c	1147	} \
grzemich	0:d7bd7384a37c	1148	try.neg = 0; \
grzemich	0:d7bd7384a37c	1149	LCPDEBUG(LOG_INFO, ("lcp_rejci: long opt %d rejected\n", opt)); \
grzemich	0:d7bd7384a37c	1150	}
grzemich	0:d7bd7384a37c	1151	#define REJCILQR(opt, neg, val) \
grzemich	0:d7bd7384a37c	1152	if (go->neg && \
grzemich	0:d7bd7384a37c	1153	len >= CILEN_LQR && \
grzemich	0:d7bd7384a37c	1154	p[1] == CILEN_LQR && \
grzemich	0:d7bd7384a37c	1155	p[0] == opt) { \
grzemich	0:d7bd7384a37c	1156	len -= CILEN_LQR; \
grzemich	0:d7bd7384a37c	1157	INCPTR(2, p); \
grzemich	0:d7bd7384a37c	1158	GETSHORT(cishort, p); \
grzemich	0:d7bd7384a37c	1159	GETLONG(cilong, p); \
grzemich	0:d7bd7384a37c	1160	/* Check rejected value. */ \
grzemich	0:d7bd7384a37c	1161	if (cishort != PPP_LQR \|\| cilong != val) { \
grzemich	0:d7bd7384a37c	1162	goto bad; \
grzemich	0:d7bd7384a37c	1163	} \
grzemich	0:d7bd7384a37c	1164	try.neg = 0; \
grzemich	0:d7bd7384a37c	1165	LCPDEBUG(LOG_INFO, ("lcp_rejci: LQR opt %d rejected\n", opt)); \
grzemich	0:d7bd7384a37c	1166	}
grzemich	0:d7bd7384a37c	1167	#define REJCICBCP(opt, neg, val) \
grzemich	0:d7bd7384a37c	1168	if (go->neg && \
grzemich	0:d7bd7384a37c	1169	len >= CILEN_CBCP && \
grzemich	0:d7bd7384a37c	1170	p[1] == CILEN_CBCP && \
grzemich	0:d7bd7384a37c	1171	p[0] == opt) { \
grzemich	0:d7bd7384a37c	1172	len -= CILEN_CBCP; \
grzemich	0:d7bd7384a37c	1173	INCPTR(2, p); \
grzemich	0:d7bd7384a37c	1174	GETCHAR(cichar, p); \
grzemich	0:d7bd7384a37c	1175	/* Check rejected value. */ \
grzemich	0:d7bd7384a37c	1176	if (cichar != val) { \
grzemich	0:d7bd7384a37c	1177	goto bad; \
grzemich	0:d7bd7384a37c	1178	} \
grzemich	0:d7bd7384a37c	1179	try.neg = 0; \
grzemich	0:d7bd7384a37c	1180	LCPDEBUG(LOG_INFO, ("lcp_rejci: Callback opt %d rejected\n", opt)); \
grzemich	0:d7bd7384a37c	1181	}
grzemich	0:d7bd7384a37c	1182
grzemich	0:d7bd7384a37c	1183	REJCISHORT(CI_MRU, neg_mru, go->mru);
grzemich	0:d7bd7384a37c	1184	REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap);
grzemich	0:d7bd7384a37c	1185	REJCICHAP(CI_AUTHTYPE, neg_chap, PPP_CHAP, go->chap_mdtype);
grzemich	0:d7bd7384a37c	1186	if (!go->neg_chap) {
grzemich	0:d7bd7384a37c	1187	REJCISHORT(CI_AUTHTYPE, neg_upap, PPP_PAP);
grzemich	0:d7bd7384a37c	1188	}
grzemich	0:d7bd7384a37c	1189	REJCILQR(CI_QUALITY, neg_lqr, go->lqr_period);
grzemich	0:d7bd7384a37c	1190	REJCICBCP(CI_CALLBACK, neg_cbcp, CBCP_OPT);
grzemich	0:d7bd7384a37c	1191	REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber);
grzemich	0:d7bd7384a37c	1192	REJCIVOID(CI_PCOMPRESSION, neg_pcompression);
grzemich	0:d7bd7384a37c	1193	REJCIVOID(CI_ACCOMPRESSION, neg_accompression);
grzemich	0:d7bd7384a37c	1194
grzemich	0:d7bd7384a37c	1195	/*
grzemich	0:d7bd7384a37c	1196	* If there are any remaining CIs, then this packet is bad.
grzemich	0:d7bd7384a37c	1197	*/
grzemich	0:d7bd7384a37c	1198	if (len != 0) {
grzemich	0:d7bd7384a37c	1199	goto bad;
grzemich	0:d7bd7384a37c	1200	}
grzemich	0:d7bd7384a37c	1201	/*
grzemich	0:d7bd7384a37c	1202	* Now we can update state.
grzemich	0:d7bd7384a37c	1203	*/
grzemich	0:d7bd7384a37c	1204	if (f->state != LS_OPENED) {
grzemich	0:d7bd7384a37c	1205	*go = try;
grzemich	0:d7bd7384a37c	1206	}
grzemich	0:d7bd7384a37c	1207	return 1;
grzemich	0:d7bd7384a37c	1208
grzemich	0:d7bd7384a37c	1209	bad:
grzemich	0:d7bd7384a37c	1210	LCPDEBUG(LOG_WARNING, ("lcp_rejci: received bad Reject!\n"));
grzemich	0:d7bd7384a37c	1211	return 0;
grzemich	0:d7bd7384a37c	1212	}
grzemich	0:d7bd7384a37c	1213
grzemich	0:d7bd7384a37c	1214
grzemich	0:d7bd7384a37c	1215	/*
grzemich	0:d7bd7384a37c	1216	* lcp_reqci - Check the peer's requested CIs and send appropriate response.
grzemich	0:d7bd7384a37c	1217	*
grzemich	0:d7bd7384a37c	1218	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
grzemich	0:d7bd7384a37c	1219	* appropriately. If reject_if_disagree is non-zero, doesn't return
grzemich	0:d7bd7384a37c	1220	* CONFNAK; returns CONFREJ if it can't return CONFACK.
grzemich	0:d7bd7384a37c	1221	*/
grzemich	0:d7bd7384a37c	1222	static int
grzemich	0:d7bd7384a37c	1223	lcp_reqci(fsm *f,
grzemich	0:d7bd7384a37c	1224	u_char inp, / Requested CIs */
grzemich	0:d7bd7384a37c	1225	int lenp, / Length of requested CIs */
grzemich	0:d7bd7384a37c	1226	int reject_if_disagree)
grzemich	0:d7bd7384a37c	1227	{
grzemich	0:d7bd7384a37c	1228	lcp_options *go = &lcp_gotoptions[f->unit];
grzemich	0:d7bd7384a37c	1229	lcp_options *ho = &lcp_hisoptions[f->unit];
grzemich	0:d7bd7384a37c	1230	lcp_options *ao = &lcp_allowoptions[f->unit];
grzemich	0:d7bd7384a37c	1231	u_char cip, next; /* Pointer to current and next CIs */
grzemich	0:d7bd7384a37c	1232	int cilen, citype; /* Parsed len, type */
grzemich	0:d7bd7384a37c	1233	u_char cichar; /* Parsed char value */
grzemich	0:d7bd7384a37c	1234	u_short cishort; /* Parsed short value */
grzemich	0:d7bd7384a37c	1235	u32_t cilong; /* Parse long value */
grzemich	0:d7bd7384a37c	1236	int rc = CONFACK; /* Final packet return code */
grzemich	0:d7bd7384a37c	1237	int orc; /* Individual option return code */
grzemich	0:d7bd7384a37c	1238	u_char p; / Pointer to next char to parse */
grzemich	0:d7bd7384a37c	1239	u_char rejp; / Pointer to next char in reject frame */
grzemich	0:d7bd7384a37c	1240	u_char nakp; / Pointer to next char in Nak frame */
grzemich	0:d7bd7384a37c	1241	int l = lenp; / Length left */
grzemich	0:d7bd7384a37c	1242	#if TRACELCP > 0
grzemich	0:d7bd7384a37c	1243	char traceBuf[80];
grzemich	0:d7bd7384a37c	1244	size_t traceNdx = 0;
grzemich	0:d7bd7384a37c	1245	#endif
grzemich	0:d7bd7384a37c	1246
grzemich	0:d7bd7384a37c	1247	/*
grzemich	0:d7bd7384a37c	1248	* Reset all his options.
grzemich	0:d7bd7384a37c	1249	*/
grzemich	0:d7bd7384a37c	1250	BZERO(ho, sizeof(*ho));
grzemich	0:d7bd7384a37c	1251
grzemich	0:d7bd7384a37c	1252	/*
grzemich	0:d7bd7384a37c	1253	* Process all his options.
grzemich	0:d7bd7384a37c	1254	*/
grzemich	0:d7bd7384a37c	1255	next = inp;
grzemich	0:d7bd7384a37c	1256	nakp = nak_buffer;
grzemich	0:d7bd7384a37c	1257	rejp = inp;
grzemich	0:d7bd7384a37c	1258	while (l) {
grzemich	0:d7bd7384a37c	1259	orc = CONFACK; /* Assume success */
grzemich	0:d7bd7384a37c	1260	cip = p = next; /* Remember begining of CI */
grzemich	0:d7bd7384a37c	1261	if (l < 2 \|\| /* Not enough data for CI header or */
grzemich	0:d7bd7384a37c	1262	p[1] < 2 \|\| /* CI length too small or */
grzemich	0:d7bd7384a37c	1263	p[1] > l) { /* CI length too big? */
grzemich	0:d7bd7384a37c	1264	LCPDEBUG(LOG_WARNING, ("lcp_reqci: bad CI length!\n"));
grzemich	0:d7bd7384a37c	1265	orc = CONFREJ; /* Reject bad CI */
grzemich	0:d7bd7384a37c	1266	cilen = l; /* Reject till end of packet */
grzemich	0:d7bd7384a37c	1267	l = 0; /* Don't loop again */
grzemich	0:d7bd7384a37c	1268	citype = 0;
grzemich	0:d7bd7384a37c	1269	goto endswitch;
grzemich	0:d7bd7384a37c	1270	}
grzemich	0:d7bd7384a37c	1271	GETCHAR(citype, p); /* Parse CI type */
grzemich	0:d7bd7384a37c	1272	GETCHAR(cilen, p); /* Parse CI length */
grzemich	0:d7bd7384a37c	1273	l -= cilen; /* Adjust remaining length */
grzemich	0:d7bd7384a37c	1274	next += cilen; /* Step to next CI */
grzemich	0:d7bd7384a37c	1275
grzemich	0:d7bd7384a37c	1276	switch (citype) { /* Check CI type */
grzemich	0:d7bd7384a37c	1277	case CI_MRU:
grzemich	0:d7bd7384a37c	1278	if (!ao->neg_mru) { /* Allow option? */
grzemich	0:d7bd7384a37c	1279	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - not allowed\n"));
grzemich	0:d7bd7384a37c	1280	orc = CONFREJ; /* Reject CI */
grzemich	0:d7bd7384a37c	1281	break;
grzemich	0:d7bd7384a37c	1282	} else if (cilen != CILEN_SHORT) { /* Check CI length */
grzemich	0:d7bd7384a37c	1283	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - bad length\n"));
grzemich	0:d7bd7384a37c	1284	orc = CONFREJ; /* Reject CI */
grzemich	0:d7bd7384a37c	1285	break;
grzemich	0:d7bd7384a37c	1286	}
grzemich	0:d7bd7384a37c	1287	GETSHORT(cishort, p); /* Parse MRU */
grzemich	0:d7bd7384a37c	1288
grzemich	0:d7bd7384a37c	1289	/*
grzemich	0:d7bd7384a37c	1290	* He must be able to receive at least our minimum.
grzemich	0:d7bd7384a37c	1291	* No need to check a maximum. If he sends a large number,
grzemich	0:d7bd7384a37c	1292	* we'll just ignore it.
grzemich	0:d7bd7384a37c	1293	*/
grzemich	0:d7bd7384a37c	1294	if (cishort < PPP_MINMRU) {
grzemich	0:d7bd7384a37c	1295	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak - MRU too small\n"));
grzemich	0:d7bd7384a37c	1296	orc = CONFNAK; /* Nak CI */
grzemich	0:d7bd7384a37c	1297	PUTCHAR(CI_MRU, nakp);
grzemich	0:d7bd7384a37c	1298	PUTCHAR(CILEN_SHORT, nakp);
grzemich	0:d7bd7384a37c	1299	PUTSHORT(PPP_MINMRU, nakp); /* Give him a hint */
grzemich	0:d7bd7384a37c	1300	break;
grzemich	0:d7bd7384a37c	1301	}
grzemich	0:d7bd7384a37c	1302	ho->neg_mru = 1; /* Remember he sent MRU */
grzemich	0:d7bd7384a37c	1303	ho->mru = cishort; /* And remember value */
grzemich	0:d7bd7384a37c	1304	#if TRACELCP > 0
grzemich	0:d7bd7384a37c	1305	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MRU %d", cishort);
grzemich	0:d7bd7384a37c	1306	traceNdx = strlen(traceBuf);
grzemich	0:d7bd7384a37c	1307	#endif
grzemich	0:d7bd7384a37c	1308	break;
grzemich	0:d7bd7384a37c	1309
grzemich	0:d7bd7384a37c	1310	case CI_ASYNCMAP:
grzemich	0:d7bd7384a37c	1311	if (!ao->neg_asyncmap) {
grzemich	0:d7bd7384a37c	1312	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP not allowed\n"));
grzemich	0:d7bd7384a37c	1313	orc = CONFREJ;
grzemich	0:d7bd7384a37c	1314	break;
grzemich	0:d7bd7384a37c	1315	} else if (cilen != CILEN_LONG) {
grzemich	0:d7bd7384a37c	1316	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP bad length\n"));
grzemich	0:d7bd7384a37c	1317	orc = CONFREJ;
grzemich	0:d7bd7384a37c	1318	break;
grzemich	0:d7bd7384a37c	1319	}
grzemich	0:d7bd7384a37c	1320	GETLONG(cilong, p);
grzemich	0:d7bd7384a37c	1321
grzemich	0:d7bd7384a37c	1322	/*
grzemich	0:d7bd7384a37c	1323	* Asyncmap must have set at least the bits
grzemich	0:d7bd7384a37c	1324	* which are set in lcp_allowoptions[unit].asyncmap.
grzemich	0:d7bd7384a37c	1325	*/
grzemich	0:d7bd7384a37c	1326	if ((ao->asyncmap & ~cilong) != 0) {
grzemich	0:d7bd7384a37c	1327	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak ASYNCMAP %lX missing %lX\n",
grzemich	0:d7bd7384a37c	1328	cilong, ao->asyncmap));
grzemich	0:d7bd7384a37c	1329	orc = CONFNAK;
grzemich	0:d7bd7384a37c	1330	PUTCHAR(CI_ASYNCMAP, nakp);
grzemich	0:d7bd7384a37c	1331	PUTCHAR(CILEN_LONG, nakp);
grzemich	0:d7bd7384a37c	1332	PUTLONG(ao->asyncmap \| cilong, nakp);
grzemich	0:d7bd7384a37c	1333	break;
grzemich	0:d7bd7384a37c	1334	}
grzemich	0:d7bd7384a37c	1335	ho->neg_asyncmap = 1;
grzemich	0:d7bd7384a37c	1336	ho->asyncmap = cilong;
grzemich	0:d7bd7384a37c	1337	#if TRACELCP > 0
grzemich	0:d7bd7384a37c	1338	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ASYNCMAP=%lX", cilong);
grzemich	0:d7bd7384a37c	1339	traceNdx = strlen(traceBuf);
grzemich	0:d7bd7384a37c	1340	#endif
grzemich	0:d7bd7384a37c	1341	break;
grzemich	0:d7bd7384a37c	1342
grzemich	0:d7bd7384a37c	1343	case CI_AUTHTYPE:
grzemich	0:d7bd7384a37c	1344	if (cilen < CILEN_SHORT) {
grzemich	0:d7bd7384a37c	1345	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE missing arg\n"));
grzemich	0:d7bd7384a37c	1346	orc = CONFREJ;
grzemich	0:d7bd7384a37c	1347	break;
grzemich	0:d7bd7384a37c	1348	} else if (!(ao->neg_upap \|\| ao->neg_chap)) {
grzemich	0:d7bd7384a37c	1349	/*
grzemich	0:d7bd7384a37c	1350	* Reject the option if we're not willing to authenticate.
grzemich	0:d7bd7384a37c	1351	*/
grzemich	0:d7bd7384a37c	1352	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE not allowed\n"));
grzemich	0:d7bd7384a37c	1353	orc = CONFREJ;
grzemich	0:d7bd7384a37c	1354	break;
grzemich	0:d7bd7384a37c	1355	}
grzemich	0:d7bd7384a37c	1356	GETSHORT(cishort, p);
grzemich	0:d7bd7384a37c	1357
grzemich	0:d7bd7384a37c	1358	/*
grzemich	0:d7bd7384a37c	1359	* Authtype must be UPAP or CHAP.
grzemich	0:d7bd7384a37c	1360	*
grzemich	0:d7bd7384a37c	1361	* Note: if both ao->neg_upap and ao->neg_chap are set,
grzemich	0:d7bd7384a37c	1362	* and the peer sends a Configure-Request with two
grzemich	0:d7bd7384a37c	1363	* authenticate-protocol requests, one for CHAP and one
grzemich	0:d7bd7384a37c	1364	* for UPAP, then we will reject the second request.
grzemich	0:d7bd7384a37c	1365	* Whether we end up doing CHAP or UPAP depends then on
grzemich	0:d7bd7384a37c	1366	* the ordering of the CIs in the peer's Configure-Request.
grzemich	0:d7bd7384a37c	1367	*/
grzemich	0:d7bd7384a37c	1368
grzemich	0:d7bd7384a37c	1369	if (cishort == PPP_PAP) {
grzemich	0:d7bd7384a37c	1370	if (ho->neg_chap) { /* we've already accepted CHAP */
grzemich	0:d7bd7384a37c	1371	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP already accepted\n"));
grzemich	0:d7bd7384a37c	1372	orc = CONFREJ;
grzemich	0:d7bd7384a37c	1373	break;
grzemich	0:d7bd7384a37c	1374	} else if (cilen != CILEN_SHORT) {
grzemich	0:d7bd7384a37c	1375	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP bad len\n"));
grzemich	0:d7bd7384a37c	1376	orc = CONFREJ;
grzemich	0:d7bd7384a37c	1377	break;
grzemich	0:d7bd7384a37c	1378	}
grzemich	0:d7bd7384a37c	1379	if (!ao->neg_upap) { /* we don't want to do PAP */
grzemich	0:d7bd7384a37c	1380	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE PAP not allowed\n"));
grzemich	0:d7bd7384a37c	1381	orc = CONFNAK; /* NAK it and suggest CHAP */
grzemich	0:d7bd7384a37c	1382	PUTCHAR(CI_AUTHTYPE, nakp);
grzemich	0:d7bd7384a37c	1383	PUTCHAR(CILEN_CHAP, nakp);
grzemich	0:d7bd7384a37c	1384	PUTSHORT(PPP_CHAP, nakp);
grzemich	0:d7bd7384a37c	1385	PUTCHAR(ao->chap_mdtype, nakp);
grzemich	0:d7bd7384a37c	1386	break;
grzemich	0:d7bd7384a37c	1387	}
grzemich	0:d7bd7384a37c	1388	ho->neg_upap = 1;
grzemich	0:d7bd7384a37c	1389	#if TRACELCP > 0
grzemich	0:d7bd7384a37c	1390	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PAP (%X)", cishort);
grzemich	0:d7bd7384a37c	1391	traceNdx = strlen(traceBuf);
grzemich	0:d7bd7384a37c	1392	#endif
grzemich	0:d7bd7384a37c	1393	break;
grzemich	0:d7bd7384a37c	1394	}
grzemich	0:d7bd7384a37c	1395	if (cishort == PPP_CHAP) {
grzemich	0:d7bd7384a37c	1396	if (ho->neg_upap) { /* we've already accepted PAP */
grzemich	0:d7bd7384a37c	1397	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP accepted PAP\n"));
grzemich	0:d7bd7384a37c	1398	orc = CONFREJ;
grzemich	0:d7bd7384a37c	1399	break;
grzemich	0:d7bd7384a37c	1400	} else if (cilen != CILEN_CHAP) {
grzemich	0:d7bd7384a37c	1401	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP bad len\n"));
grzemich	0:d7bd7384a37c	1402	orc = CONFREJ;
grzemich	0:d7bd7384a37c	1403	break;
grzemich	0:d7bd7384a37c	1404	}
grzemich	0:d7bd7384a37c	1405	if (!ao->neg_chap) { /* we don't want to do CHAP */
grzemich	0:d7bd7384a37c	1406	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP not allowed\n"));
grzemich	0:d7bd7384a37c	1407	orc = CONFNAK; /* NAK it and suggest PAP */
grzemich	0:d7bd7384a37c	1408	PUTCHAR(CI_AUTHTYPE, nakp);
grzemich	0:d7bd7384a37c	1409	PUTCHAR(CILEN_SHORT, nakp);
grzemich	0:d7bd7384a37c	1410	PUTSHORT(PPP_PAP, nakp);
grzemich	0:d7bd7384a37c	1411	break;
grzemich	0:d7bd7384a37c	1412	}
grzemich	0:d7bd7384a37c	1413	GETCHAR(cichar, p); /* get digest type*/
grzemich	0:d7bd7384a37c	1414	if (cichar != CHAP_DIGEST_MD5
grzemich	0:d7bd7384a37c	1415	#if MSCHAP_SUPPORT
grzemich	0:d7bd7384a37c	1416	&& cichar != CHAP_MICROSOFT
grzemich	0:d7bd7384a37c	1417	#endif
grzemich	0:d7bd7384a37c	1418	) {
grzemich	0:d7bd7384a37c	1419	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP digest=%d\n", (int)cichar));
grzemich	0:d7bd7384a37c	1420	orc = CONFNAK;
grzemich	0:d7bd7384a37c	1421	PUTCHAR(CI_AUTHTYPE, nakp);
grzemich	0:d7bd7384a37c	1422	PUTCHAR(CILEN_CHAP, nakp);
grzemich	0:d7bd7384a37c	1423	PUTSHORT(PPP_CHAP, nakp);
grzemich	0:d7bd7384a37c	1424	PUTCHAR(ao->chap_mdtype, nakp);
grzemich	0:d7bd7384a37c	1425	break;
grzemich	0:d7bd7384a37c	1426	}
grzemich	0:d7bd7384a37c	1427	#if TRACELCP > 0
grzemich	0:d7bd7384a37c	1428	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CHAP %X,%d", cishort, (int)cichar);
grzemich	0:d7bd7384a37c	1429	traceNdx = strlen(traceBuf);
grzemich	0:d7bd7384a37c	1430	#endif
grzemich	0:d7bd7384a37c	1431	ho->chap_mdtype = cichar; /* save md type */
grzemich	0:d7bd7384a37c	1432	ho->neg_chap = 1;
grzemich	0:d7bd7384a37c	1433	break;
grzemich	0:d7bd7384a37c	1434	}
grzemich	0:d7bd7384a37c	1435
grzemich	0:d7bd7384a37c	1436	/*
grzemich	0:d7bd7384a37c	1437	* We don't recognize the protocol they're asking for.
grzemich	0:d7bd7384a37c	1438	* Nak it with something we're willing to do.
grzemich	0:d7bd7384a37c	1439	* (At this point we know ao->neg_upap \|\| ao->neg_chap.)
grzemich	0:d7bd7384a37c	1440	*/
grzemich	0:d7bd7384a37c	1441	orc = CONFNAK;
grzemich	0:d7bd7384a37c	1442	PUTCHAR(CI_AUTHTYPE, nakp);
grzemich	0:d7bd7384a37c	1443	if (ao->neg_chap) {
grzemich	0:d7bd7384a37c	1444	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req CHAP\n", cishort));
grzemich	0:d7bd7384a37c	1445	PUTCHAR(CILEN_CHAP, nakp);
grzemich	0:d7bd7384a37c	1446	PUTSHORT(PPP_CHAP, nakp);
grzemich	0:d7bd7384a37c	1447	PUTCHAR(ao->chap_mdtype, nakp);
grzemich	0:d7bd7384a37c	1448	} else {
grzemich	0:d7bd7384a37c	1449	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req PAP\n", cishort));
grzemich	0:d7bd7384a37c	1450	PUTCHAR(CILEN_SHORT, nakp);
grzemich	0:d7bd7384a37c	1451	PUTSHORT(PPP_PAP, nakp);
grzemich	0:d7bd7384a37c	1452	}
grzemich	0:d7bd7384a37c	1453	break;
grzemich	0:d7bd7384a37c	1454
grzemich	0:d7bd7384a37c	1455	case CI_QUALITY:
grzemich	0:d7bd7384a37c	1456	GETSHORT(cishort, p);
grzemich	0:d7bd7384a37c	1457	GETLONG(cilong, p);
grzemich	0:d7bd7384a37c	1458	#if TRACELCP > 0
grzemich	0:d7bd7384a37c	1459	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " QUALITY (%x %x)", cishort, (unsigned int) cilong);
grzemich	0:d7bd7384a37c	1460	traceNdx = strlen(traceBuf);
grzemich	0:d7bd7384a37c	1461	#endif
grzemich	0:d7bd7384a37c	1462
grzemich	0:d7bd7384a37c	1463	if (!ao->neg_lqr \|\|
grzemich	0:d7bd7384a37c	1464	cilen != CILEN_LQR) {
grzemich	0:d7bd7384a37c	1465	orc = CONFREJ;
grzemich	0:d7bd7384a37c	1466	break;
grzemich	0:d7bd7384a37c	1467	}
grzemich	0:d7bd7384a37c	1468
grzemich	0:d7bd7384a37c	1469	/*
grzemich	0:d7bd7384a37c	1470	* Check the protocol and the reporting period.
grzemich	0:d7bd7384a37c	1471	* XXX When should we Nak this, and what with?
grzemich	0:d7bd7384a37c	1472	*/
grzemich	0:d7bd7384a37c	1473	if (cishort != PPP_LQR) {
grzemich	0:d7bd7384a37c	1474	orc = CONFNAK;
grzemich	0:d7bd7384a37c	1475	PUTCHAR(CI_QUALITY, nakp);
grzemich	0:d7bd7384a37c	1476	PUTCHAR(CILEN_LQR, nakp);
grzemich	0:d7bd7384a37c	1477	PUTSHORT(PPP_LQR, nakp);
grzemich	0:d7bd7384a37c	1478	PUTLONG(ao->lqr_period, nakp);
grzemich	0:d7bd7384a37c	1479	break;
grzemich	0:d7bd7384a37c	1480	}
grzemich	0:d7bd7384a37c	1481	break;
grzemich	0:d7bd7384a37c	1482
grzemich	0:d7bd7384a37c	1483	case CI_MAGICNUMBER:
grzemich	0:d7bd7384a37c	1484	if (!(ao->neg_magicnumber \|\| go->neg_magicnumber) \|\|
grzemich	0:d7bd7384a37c	1485	cilen != CILEN_LONG) {
grzemich	0:d7bd7384a37c	1486	orc = CONFREJ;
grzemich	0:d7bd7384a37c	1487	break;
grzemich	0:d7bd7384a37c	1488	}
grzemich	0:d7bd7384a37c	1489	GETLONG(cilong, p);
grzemich	0:d7bd7384a37c	1490	#if TRACELCP > 0
grzemich	0:d7bd7384a37c	1491	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MAGICNUMBER (%lX)", cilong);
grzemich	0:d7bd7384a37c	1492	traceNdx = strlen(traceBuf);
grzemich	0:d7bd7384a37c	1493	#endif
grzemich	0:d7bd7384a37c	1494
grzemich	0:d7bd7384a37c	1495	/*
grzemich	0:d7bd7384a37c	1496	* He must have a different magic number.
grzemich	0:d7bd7384a37c	1497	*/
grzemich	0:d7bd7384a37c	1498	if (go->neg_magicnumber &&
grzemich	0:d7bd7384a37c	1499	cilong == go->magicnumber) {
grzemich	0:d7bd7384a37c	1500	cilong = magic(); /* Don't put magic() inside macro! */
grzemich	0:d7bd7384a37c	1501	orc = CONFNAK;
grzemich	0:d7bd7384a37c	1502	PUTCHAR(CI_MAGICNUMBER, nakp);
grzemich	0:d7bd7384a37c	1503	PUTCHAR(CILEN_LONG, nakp);
grzemich	0:d7bd7384a37c	1504	PUTLONG(cilong, nakp);
grzemich	0:d7bd7384a37c	1505	break;
grzemich	0:d7bd7384a37c	1506	}
grzemich	0:d7bd7384a37c	1507	ho->neg_magicnumber = 1;
grzemich	0:d7bd7384a37c	1508	ho->magicnumber = cilong;
grzemich	0:d7bd7384a37c	1509	break;
grzemich	0:d7bd7384a37c	1510
grzemich	0:d7bd7384a37c	1511
grzemich	0:d7bd7384a37c	1512	case CI_PCOMPRESSION:
grzemich	0:d7bd7384a37c	1513	#if TRACELCP > 0
grzemich	0:d7bd7384a37c	1514	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PCOMPRESSION");
grzemich	0:d7bd7384a37c	1515	traceNdx = strlen(traceBuf);
grzemich	0:d7bd7384a37c	1516	#endif
grzemich	0:d7bd7384a37c	1517	if (!ao->neg_pcompression \|\|
grzemich	0:d7bd7384a37c	1518	cilen != CILEN_VOID) {
grzemich	0:d7bd7384a37c	1519	orc = CONFREJ;
grzemich	0:d7bd7384a37c	1520	break;
grzemich	0:d7bd7384a37c	1521	}
grzemich	0:d7bd7384a37c	1522	ho->neg_pcompression = 1;
grzemich	0:d7bd7384a37c	1523	break;
grzemich	0:d7bd7384a37c	1524
grzemich	0:d7bd7384a37c	1525	case CI_ACCOMPRESSION:
grzemich	0:d7bd7384a37c	1526	#if TRACELCP > 0
grzemich	0:d7bd7384a37c	1527	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ACCOMPRESSION");
grzemich	0:d7bd7384a37c	1528	traceNdx = strlen(traceBuf);
grzemich	0:d7bd7384a37c	1529	#endif
grzemich	0:d7bd7384a37c	1530	if (!ao->neg_accompression \|\|
grzemich	0:d7bd7384a37c	1531	cilen != CILEN_VOID) {
grzemich	0:d7bd7384a37c	1532	orc = CONFREJ;
grzemich	0:d7bd7384a37c	1533	break;
grzemich	0:d7bd7384a37c	1534	}
grzemich	0:d7bd7384a37c	1535	ho->neg_accompression = 1;
grzemich	0:d7bd7384a37c	1536	break;
grzemich	0:d7bd7384a37c	1537
grzemich	0:d7bd7384a37c	1538	case CI_MRRU:
grzemich	0:d7bd7384a37c	1539	#if TRACELCP > 0
grzemich	0:d7bd7384a37c	1540	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_MRRU");
grzemich	0:d7bd7384a37c	1541	traceNdx = strlen(traceBuf);
grzemich	0:d7bd7384a37c	1542	#endif
grzemich	0:d7bd7384a37c	1543	orc = CONFREJ;
grzemich	0:d7bd7384a37c	1544	break;
grzemich	0:d7bd7384a37c	1545
grzemich	0:d7bd7384a37c	1546	case CI_SSNHF:
grzemich	0:d7bd7384a37c	1547	#if TRACELCP > 0
grzemich	0:d7bd7384a37c	1548	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_SSNHF");
grzemich	0:d7bd7384a37c	1549	traceNdx = strlen(traceBuf);
grzemich	0:d7bd7384a37c	1550	#endif
grzemich	0:d7bd7384a37c	1551	orc = CONFREJ;
grzemich	0:d7bd7384a37c	1552	break;
grzemich	0:d7bd7384a37c	1553
grzemich	0:d7bd7384a37c	1554	case CI_EPDISC:
grzemich	0:d7bd7384a37c	1555	#if TRACELCP > 0
grzemich	0:d7bd7384a37c	1556	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_EPDISC");
grzemich	0:d7bd7384a37c	1557	traceNdx = strlen(traceBuf);
grzemich	0:d7bd7384a37c	1558	#endif
grzemich	0:d7bd7384a37c	1559	orc = CONFREJ;
grzemich	0:d7bd7384a37c	1560	break;
grzemich	0:d7bd7384a37c	1561
grzemich	0:d7bd7384a37c	1562	default:
grzemich	0:d7bd7384a37c	1563	#if TRACELCP
grzemich	0:d7bd7384a37c	1564	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " unknown %d", citype);
grzemich	0:d7bd7384a37c	1565	traceNdx = strlen(traceBuf);
grzemich	0:d7bd7384a37c	1566	#endif
grzemich	0:d7bd7384a37c	1567	orc = CONFREJ;
grzemich	0:d7bd7384a37c	1568	break;
grzemich	0:d7bd7384a37c	1569	}
grzemich	0:d7bd7384a37c	1570
grzemich	0:d7bd7384a37c	1571	endswitch:
grzemich	0:d7bd7384a37c	1572	#if TRACELCP
grzemich	0:d7bd7384a37c	1573	if (traceNdx >= 80 - 32) {
grzemich	0:d7bd7384a37c	1574	LCPDEBUG(LOG_INFO, ("lcp_reqci: rcvd%s\n", traceBuf));
grzemich	0:d7bd7384a37c	1575	traceNdx = 0;
grzemich	0:d7bd7384a37c	1576	}
grzemich	0:d7bd7384a37c	1577	#endif
grzemich	0:d7bd7384a37c	1578	if (orc == CONFACK && /* Good CI */
grzemich	0:d7bd7384a37c	1579	rc != CONFACK) { /* but prior CI wasnt? */
grzemich	0:d7bd7384a37c	1580	continue; /* Don't send this one */
grzemich	0:d7bd7384a37c	1581	}
grzemich	0:d7bd7384a37c	1582
grzemich	0:d7bd7384a37c	1583	if (orc == CONFNAK) { /* Nak this CI? */
grzemich	0:d7bd7384a37c	1584	if (reject_if_disagree /* Getting fed up with sending NAKs? */
grzemich	0:d7bd7384a37c	1585	&& citype != CI_MAGICNUMBER) {
grzemich	0:d7bd7384a37c	1586	orc = CONFREJ; /* Get tough if so */
grzemich	0:d7bd7384a37c	1587	} else {
grzemich	0:d7bd7384a37c	1588	if (rc == CONFREJ) { /* Rejecting prior CI? */
grzemich	0:d7bd7384a37c	1589	continue; /* Don't send this one */
grzemich	0:d7bd7384a37c	1590	}
grzemich	0:d7bd7384a37c	1591	rc = CONFNAK;
grzemich	0:d7bd7384a37c	1592	}
grzemich	0:d7bd7384a37c	1593	}
grzemich	0:d7bd7384a37c	1594	if (orc == CONFREJ) { /* Reject this CI */
grzemich	0:d7bd7384a37c	1595	rc = CONFREJ;
grzemich	0:d7bd7384a37c	1596	if (cip != rejp) { /* Need to move rejected CI? */
grzemich	0:d7bd7384a37c	1597	BCOPY(cip, rejp, cilen); /* Move it */
grzemich	0:d7bd7384a37c	1598	}
grzemich	0:d7bd7384a37c	1599	INCPTR(cilen, rejp); /* Update output pointer */
grzemich	0:d7bd7384a37c	1600	}
grzemich	0:d7bd7384a37c	1601	}
grzemich	0:d7bd7384a37c	1602
grzemich	0:d7bd7384a37c	1603	/*
grzemich	0:d7bd7384a37c	1604	* If we wanted to send additional NAKs (for unsent CIs), the
grzemich	0:d7bd7384a37c	1605	* code would go here. The extra NAKs would go at *nakp.
grzemich	0:d7bd7384a37c	1606	* At present there are no cases where we want to ask the
grzemich	0:d7bd7384a37c	1607	* peer to negotiate an option.
grzemich	0:d7bd7384a37c	1608	*/
grzemich	0:d7bd7384a37c	1609
grzemich	0:d7bd7384a37c	1610	switch (rc) {
grzemich	0:d7bd7384a37c	1611	case CONFACK:
grzemich	0:d7bd7384a37c	1612	*lenp = (int)(next - inp);
grzemich	0:d7bd7384a37c	1613	break;
grzemich	0:d7bd7384a37c	1614	case CONFNAK:
grzemich	0:d7bd7384a37c	1615	/*
grzemich	0:d7bd7384a37c	1616	* Copy the Nak'd options from the nak_buffer to the caller's buffer.
grzemich	0:d7bd7384a37c	1617	*/
grzemich	0:d7bd7384a37c	1618	*lenp = (int)(nakp - nak_buffer);
grzemich	0:d7bd7384a37c	1619	BCOPY(nak_buffer, inp, *lenp);
grzemich	0:d7bd7384a37c	1620	break;
grzemich	0:d7bd7384a37c	1621	case CONFREJ:
grzemich	0:d7bd7384a37c	1622	*lenp = (int)(rejp - inp);
grzemich	0:d7bd7384a37c	1623	break;
grzemich	0:d7bd7384a37c	1624	}
grzemich	0:d7bd7384a37c	1625
grzemich	0:d7bd7384a37c	1626	#if TRACELCP > 0
grzemich	0:d7bd7384a37c	1627	if (traceNdx > 0) {
grzemich	0:d7bd7384a37c	1628	LCPDEBUG(LOG_INFO, ("lcp_reqci: %s\n", traceBuf));
grzemich	0:d7bd7384a37c	1629	}
grzemich	0:d7bd7384a37c	1630	#endif
grzemich	0:d7bd7384a37c	1631	LCPDEBUG(LOG_INFO, ("lcp_reqci: returning CONF%s.\n", CODENAME(rc)));
grzemich	0:d7bd7384a37c	1632	return (rc); /* Return final code */
grzemich	0:d7bd7384a37c	1633	}
grzemich	0:d7bd7384a37c	1634
grzemich	0:d7bd7384a37c	1635
grzemich	0:d7bd7384a37c	1636	/*
grzemich	0:d7bd7384a37c	1637	* lcp_up - LCP has come UP.
grzemich	0:d7bd7384a37c	1638	*/
grzemich	0:d7bd7384a37c	1639	static void
grzemich	0:d7bd7384a37c	1640	lcp_up(fsm *f)
grzemich	0:d7bd7384a37c	1641	{
grzemich	0:d7bd7384a37c	1642	lcp_options *wo = &lcp_wantoptions[f->unit];
grzemich	0:d7bd7384a37c	1643	lcp_options *ho = &lcp_hisoptions[f->unit];
grzemich	0:d7bd7384a37c	1644	lcp_options *go = &lcp_gotoptions[f->unit];
grzemich	0:d7bd7384a37c	1645	lcp_options *ao = &lcp_allowoptions[f->unit];
grzemich	0:d7bd7384a37c	1646
grzemich	0:d7bd7384a37c	1647	if (!go->neg_magicnumber) {
grzemich	0:d7bd7384a37c	1648	go->magicnumber = 0;
grzemich	0:d7bd7384a37c	1649	}
grzemich	0:d7bd7384a37c	1650	if (!ho->neg_magicnumber) {
grzemich	0:d7bd7384a37c	1651	ho->magicnumber = 0;
grzemich	0:d7bd7384a37c	1652	}
grzemich	0:d7bd7384a37c	1653
grzemich	0:d7bd7384a37c	1654	/*
grzemich	0:d7bd7384a37c	1655	* Set our MTU to the smaller of the MTU we wanted and
grzemich	0:d7bd7384a37c	1656	* the MRU our peer wanted. If we negotiated an MRU,
grzemich	0:d7bd7384a37c	1657	* set our MRU to the larger of value we wanted and
grzemich	0:d7bd7384a37c	1658	* the value we got in the negotiation.
grzemich	0:d7bd7384a37c	1659	*/
grzemich	0:d7bd7384a37c	1660	ppp_send_config(f->unit, LWIP_MIN(ao->mru, (ho->neg_mru? ho->mru: PPP_MRU)),
grzemich	0:d7bd7384a37c	1661	(ho->neg_asyncmap? ho->asyncmap: 0xffffffffl),
grzemich	0:d7bd7384a37c	1662	ho->neg_pcompression, ho->neg_accompression);
grzemich	0:d7bd7384a37c	1663	/*
grzemich	0:d7bd7384a37c	1664	* If the asyncmap hasn't been negotiated, we really should
grzemich	0:d7bd7384a37c	1665	* set the receive asyncmap to ffffffff, but we set it to 0
grzemich	0:d7bd7384a37c	1666	* for backwards contemptibility.
grzemich	0:d7bd7384a37c	1667	*/
grzemich	0:d7bd7384a37c	1668	ppp_recv_config(f->unit, (go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU),
grzemich	0:d7bd7384a37c	1669	(go->neg_asyncmap? go->asyncmap: 0x00000000),
grzemich	0:d7bd7384a37c	1670	go->neg_pcompression, go->neg_accompression);
grzemich	0:d7bd7384a37c	1671
grzemich	0:d7bd7384a37c	1672	if (ho->neg_mru) {
grzemich	0:d7bd7384a37c	1673	peer_mru[f->unit] = ho->mru;
grzemich	0:d7bd7384a37c	1674	}
grzemich	0:d7bd7384a37c	1675
grzemich	0:d7bd7384a37c	1676	lcp_echo_lowerup(f->unit); /* Enable echo messages */
grzemich	0:d7bd7384a37c	1677
grzemich	0:d7bd7384a37c	1678	link_established(f->unit); /* The link is up; authenticate now */
grzemich	0:d7bd7384a37c	1679	}
grzemich	0:d7bd7384a37c	1680
grzemich	0:d7bd7384a37c	1681
grzemich	0:d7bd7384a37c	1682	/*
grzemich	0:d7bd7384a37c	1683	* lcp_down - LCP has gone DOWN.
grzemich	0:d7bd7384a37c	1684	*
grzemich	0:d7bd7384a37c	1685	* Alert other protocols.
grzemich	0:d7bd7384a37c	1686	*/
grzemich	0:d7bd7384a37c	1687	static void
grzemich	0:d7bd7384a37c	1688	lcp_down(fsm *f)
grzemich	0:d7bd7384a37c	1689	{
grzemich	0:d7bd7384a37c	1690	lcp_options *go = &lcp_gotoptions[f->unit];
grzemich	0:d7bd7384a37c	1691
grzemich	0:d7bd7384a37c	1692	lcp_echo_lowerdown(f->unit);
grzemich	0:d7bd7384a37c	1693
grzemich	0:d7bd7384a37c	1694	link_down(f->unit);
grzemich	0:d7bd7384a37c	1695
grzemich	0:d7bd7384a37c	1696	ppp_send_config(f->unit, PPP_MRU, 0xffffffffl, 0, 0);
grzemich	0:d7bd7384a37c	1697	ppp_recv_config(f->unit, PPP_MRU,
grzemich	0:d7bd7384a37c	1698	(go->neg_asyncmap? go->asyncmap: 0x00000000),
grzemich	0:d7bd7384a37c	1699	go->neg_pcompression, go->neg_accompression);
grzemich	0:d7bd7384a37c	1700	peer_mru[f->unit] = PPP_MRU;
grzemich	0:d7bd7384a37c	1701	}
grzemich	0:d7bd7384a37c	1702
grzemich	0:d7bd7384a37c	1703
grzemich	0:d7bd7384a37c	1704	/*
grzemich	0:d7bd7384a37c	1705	* lcp_starting - LCP needs the lower layer up.
grzemich	0:d7bd7384a37c	1706	*/
grzemich	0:d7bd7384a37c	1707	static void
grzemich	0:d7bd7384a37c	1708	lcp_starting(fsm *f)
grzemich	0:d7bd7384a37c	1709	{
grzemich	0:d7bd7384a37c	1710	link_required(f->unit); /* lwip: currently does nothing */
grzemich	0:d7bd7384a37c	1711	}
grzemich	0:d7bd7384a37c	1712
grzemich	0:d7bd7384a37c	1713
grzemich	0:d7bd7384a37c	1714	/*
grzemich	0:d7bd7384a37c	1715	* lcp_finished - LCP has finished with the lower layer.
grzemich	0:d7bd7384a37c	1716	*/
grzemich	0:d7bd7384a37c	1717	static void
grzemich	0:d7bd7384a37c	1718	lcp_finished(fsm *f)
grzemich	0:d7bd7384a37c	1719	{
grzemich	0:d7bd7384a37c	1720	link_terminated(f->unit); /* we are finished with the link */
grzemich	0:d7bd7384a37c	1721	}
grzemich	0:d7bd7384a37c	1722
grzemich	0:d7bd7384a37c	1723
grzemich	0:d7bd7384a37c	1724	#if PPP_ADDITIONAL_CALLBACKS
grzemich	0:d7bd7384a37c	1725	/*
grzemich	0:d7bd7384a37c	1726	* print_string - print a readable representation of a string using
grzemich	0:d7bd7384a37c	1727	* printer.
grzemich	0:d7bd7384a37c	1728	*/
grzemich	0:d7bd7384a37c	1729	static void
grzemich	0:d7bd7384a37c	1730	print_string( char p, int len, void (printer) (void , char , ...), void *arg)
grzemich	0:d7bd7384a37c	1731	{
grzemich	0:d7bd7384a37c	1732	int c;
grzemich	0:d7bd7384a37c	1733
grzemich	0:d7bd7384a37c	1734	printer(arg, "\"");
grzemich	0:d7bd7384a37c	1735	for (; len > 0; --len) {
grzemich	0:d7bd7384a37c	1736	c = *p++;
grzemich	0:d7bd7384a37c	1737	if (' ' <= c && c <= '~') {
grzemich	0:d7bd7384a37c	1738	if (c == '\\' \|\| c == '"') {
grzemich	0:d7bd7384a37c	1739	printer(arg, "\\");
grzemich	0:d7bd7384a37c	1740	}
grzemich	0:d7bd7384a37c	1741	printer(arg, "%c", c);
grzemich	0:d7bd7384a37c	1742	} else {
grzemich	0:d7bd7384a37c	1743	switch (c) {
grzemich	0:d7bd7384a37c	1744	case '\n':
grzemich	0:d7bd7384a37c	1745	printer(arg, "\\n");
grzemich	0:d7bd7384a37c	1746	break;
grzemich	0:d7bd7384a37c	1747	case '\r':
grzemich	0:d7bd7384a37c	1748	printer(arg, "\\r");
grzemich	0:d7bd7384a37c	1749	break;
grzemich	0:d7bd7384a37c	1750	case '\t':
grzemich	0:d7bd7384a37c	1751	printer(arg, "\\t");
grzemich	0:d7bd7384a37c	1752	break;
grzemich	0:d7bd7384a37c	1753	default:
grzemich	0:d7bd7384a37c	1754	printer(arg, "\\%.3o", c);
grzemich	0:d7bd7384a37c	1755	}
grzemich	0:d7bd7384a37c	1756	}
grzemich	0:d7bd7384a37c	1757	}
grzemich	0:d7bd7384a37c	1758	printer(arg, "\"");
grzemich	0:d7bd7384a37c	1759	}
grzemich	0:d7bd7384a37c	1760
grzemich	0:d7bd7384a37c	1761
grzemich	0:d7bd7384a37c	1762	/*
grzemich	0:d7bd7384a37c	1763	* lcp_printpkt - print the contents of an LCP packet.
grzemich	0:d7bd7384a37c	1764	*/
grzemich	0:d7bd7384a37c	1765	static char *lcp_codenames[] = {
grzemich	0:d7bd7384a37c	1766	"ConfReq", "ConfAck", "ConfNak", "ConfRej",
grzemich	0:d7bd7384a37c	1767	"TermReq", "TermAck", "CodeRej", "ProtRej",
grzemich	0:d7bd7384a37c	1768	"EchoReq", "EchoRep", "DiscReq"
grzemich	0:d7bd7384a37c	1769	};
grzemich	0:d7bd7384a37c	1770
grzemich	0:d7bd7384a37c	1771	static int
grzemich	0:d7bd7384a37c	1772	lcp_printpkt( u_char p, int plen, void (printer) (void , char , ...), void *arg)
grzemich	0:d7bd7384a37c	1773	{
grzemich	0:d7bd7384a37c	1774	int code, id, len, olen;
grzemich	0:d7bd7384a37c	1775	u_char pstart, optend;
grzemich	0:d7bd7384a37c	1776	u_short cishort;
grzemich	0:d7bd7384a37c	1777	u32_t cilong;
grzemich	0:d7bd7384a37c	1778
grzemich	0:d7bd7384a37c	1779	if (plen < HEADERLEN) {
grzemich	0:d7bd7384a37c	1780	return 0;
grzemich	0:d7bd7384a37c	1781	}
grzemich	0:d7bd7384a37c	1782	pstart = p;
grzemich	0:d7bd7384a37c	1783	GETCHAR(code, p);
grzemich	0:d7bd7384a37c	1784	GETCHAR(id, p);
grzemich	0:d7bd7384a37c	1785	GETSHORT(len, p);
grzemich	0:d7bd7384a37c	1786	if (len < HEADERLEN \|\| len > plen) {
grzemich	0:d7bd7384a37c	1787	return 0;
grzemich	0:d7bd7384a37c	1788	}
grzemich	0:d7bd7384a37c	1789
grzemich	0:d7bd7384a37c	1790	if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *)) {
grzemich	0:d7bd7384a37c	1791	printer(arg, " %s", lcp_codenames[code-1]);
grzemich	0:d7bd7384a37c	1792	} else {
grzemich	0:d7bd7384a37c	1793	printer(arg, " code=0x%x", code);
grzemich	0:d7bd7384a37c	1794	}
grzemich	0:d7bd7384a37c	1795	printer(arg, " id=0x%x", id);
grzemich	0:d7bd7384a37c	1796	len -= HEADERLEN;
grzemich	0:d7bd7384a37c	1797	switch (code) {
grzemich	0:d7bd7384a37c	1798	case CONFREQ:
grzemich	0:d7bd7384a37c	1799	case CONFACK:
grzemich	0:d7bd7384a37c	1800	case CONFNAK:
grzemich	0:d7bd7384a37c	1801	case CONFREJ:
grzemich	0:d7bd7384a37c	1802	/* print option list */
grzemich	0:d7bd7384a37c	1803	while (len >= 2) {
grzemich	0:d7bd7384a37c	1804	GETCHAR(code, p);
grzemich	0:d7bd7384a37c	1805	GETCHAR(olen, p);
grzemich	0:d7bd7384a37c	1806	p -= 2;
grzemich	0:d7bd7384a37c	1807	if (olen < 2 \|\| olen > len) {
grzemich	0:d7bd7384a37c	1808	break;
grzemich	0:d7bd7384a37c	1809	}
grzemich	0:d7bd7384a37c	1810	printer(arg, " <");
grzemich	0:d7bd7384a37c	1811	len -= olen;
grzemich	0:d7bd7384a37c	1812	optend = p + olen;
grzemich	0:d7bd7384a37c	1813	switch (code) {
grzemich	0:d7bd7384a37c	1814	case CI_MRU:
grzemich	0:d7bd7384a37c	1815	if (olen == CILEN_SHORT) {
grzemich	0:d7bd7384a37c	1816	p += 2;
grzemich	0:d7bd7384a37c	1817	GETSHORT(cishort, p);
grzemich	0:d7bd7384a37c	1818	printer(arg, "mru %d", cishort);
grzemich	0:d7bd7384a37c	1819	}
grzemich	0:d7bd7384a37c	1820	break;
grzemich	0:d7bd7384a37c	1821	case CI_ASYNCMAP:
grzemich	0:d7bd7384a37c	1822	if (olen == CILEN_LONG) {
grzemich	0:d7bd7384a37c	1823	p += 2;
grzemich	0:d7bd7384a37c	1824	GETLONG(cilong, p);
grzemich	0:d7bd7384a37c	1825	printer(arg, "asyncmap 0x%lx", cilong);
grzemich	0:d7bd7384a37c	1826	}
grzemich	0:d7bd7384a37c	1827	break;
grzemich	0:d7bd7384a37c	1828	case CI_AUTHTYPE:
grzemich	0:d7bd7384a37c	1829	if (olen >= CILEN_SHORT) {
grzemich	0:d7bd7384a37c	1830	p += 2;
grzemich	0:d7bd7384a37c	1831	printer(arg, "auth ");
grzemich	0:d7bd7384a37c	1832	GETSHORT(cishort, p);
grzemich	0:d7bd7384a37c	1833	switch (cishort) {
grzemich	0:d7bd7384a37c	1834	case PPP_PAP:
grzemich	0:d7bd7384a37c	1835	printer(arg, "pap");
grzemich	0:d7bd7384a37c	1836	break;
grzemich	0:d7bd7384a37c	1837	case PPP_CHAP:
grzemich	0:d7bd7384a37c	1838	printer(arg, "chap");
grzemich	0:d7bd7384a37c	1839	break;
grzemich	0:d7bd7384a37c	1840	default:
grzemich	0:d7bd7384a37c	1841	printer(arg, "0x%x", cishort);
grzemich	0:d7bd7384a37c	1842	}
grzemich	0:d7bd7384a37c	1843	}
grzemich	0:d7bd7384a37c	1844	break;
grzemich	0:d7bd7384a37c	1845	case CI_QUALITY:
grzemich	0:d7bd7384a37c	1846	if (olen >= CILEN_SHORT) {
grzemich	0:d7bd7384a37c	1847	p += 2;
grzemich	0:d7bd7384a37c	1848	printer(arg, "quality ");
grzemich	0:d7bd7384a37c	1849	GETSHORT(cishort, p);
grzemich	0:d7bd7384a37c	1850	switch (cishort) {
grzemich	0:d7bd7384a37c	1851	case PPP_LQR:
grzemich	0:d7bd7384a37c	1852	printer(arg, "lqr");
grzemich	0:d7bd7384a37c	1853	break;
grzemich	0:d7bd7384a37c	1854	default:
grzemich	0:d7bd7384a37c	1855	printer(arg, "0x%x", cishort);
grzemich	0:d7bd7384a37c	1856	}
grzemich	0:d7bd7384a37c	1857	}
grzemich	0:d7bd7384a37c	1858	break;
grzemich	0:d7bd7384a37c	1859	case CI_CALLBACK:
grzemich	0:d7bd7384a37c	1860	if (olen >= CILEN_CHAR) {
grzemich	0:d7bd7384a37c	1861	p += 2;
grzemich	0:d7bd7384a37c	1862	printer(arg, "callback ");
grzemich	0:d7bd7384a37c	1863	GETSHORT(cishort, p);
grzemich	0:d7bd7384a37c	1864	switch (cishort) {
grzemich	0:d7bd7384a37c	1865	case CBCP_OPT:
grzemich	0:d7bd7384a37c	1866	printer(arg, "CBCP");
grzemich	0:d7bd7384a37c	1867	break;
grzemich	0:d7bd7384a37c	1868	default:
grzemich	0:d7bd7384a37c	1869	printer(arg, "0x%x", cishort);
grzemich	0:d7bd7384a37c	1870	}
grzemich	0:d7bd7384a37c	1871	}
grzemich	0:d7bd7384a37c	1872	break;
grzemich	0:d7bd7384a37c	1873	case CI_MAGICNUMBER:
grzemich	0:d7bd7384a37c	1874	if (olen == CILEN_LONG) {
grzemich	0:d7bd7384a37c	1875	p += 2;
grzemich	0:d7bd7384a37c	1876	GETLONG(cilong, p);
grzemich	0:d7bd7384a37c	1877	printer(arg, "magic 0x%x", cilong);
grzemich	0:d7bd7384a37c	1878	}
grzemich	0:d7bd7384a37c	1879	break;
grzemich	0:d7bd7384a37c	1880	case CI_PCOMPRESSION:
grzemich	0:d7bd7384a37c	1881	if (olen == CILEN_VOID) {
grzemich	0:d7bd7384a37c	1882	p += 2;
grzemich	0:d7bd7384a37c	1883	printer(arg, "pcomp");
grzemich	0:d7bd7384a37c	1884	}
grzemich	0:d7bd7384a37c	1885	break;
grzemich	0:d7bd7384a37c	1886	case CI_ACCOMPRESSION:
grzemich	0:d7bd7384a37c	1887	if (olen == CILEN_VOID) {
grzemich	0:d7bd7384a37c	1888	p += 2;
grzemich	0:d7bd7384a37c	1889	printer(arg, "accomp");
grzemich	0:d7bd7384a37c	1890	}
grzemich	0:d7bd7384a37c	1891	break;
grzemich	0:d7bd7384a37c	1892	}
grzemich	0:d7bd7384a37c	1893	while (p < optend) {
grzemich	0:d7bd7384a37c	1894	GETCHAR(code, p);
grzemich	0:d7bd7384a37c	1895	printer(arg, " %.2x", code);
grzemich	0:d7bd7384a37c	1896	}
grzemich	0:d7bd7384a37c	1897	printer(arg, ">");
grzemich	0:d7bd7384a37c	1898	}
grzemich	0:d7bd7384a37c	1899	break;
grzemich	0:d7bd7384a37c	1900
grzemich	0:d7bd7384a37c	1901	case TERMACK:
grzemich	0:d7bd7384a37c	1902	case TERMREQ:
grzemich	0:d7bd7384a37c	1903	if (len > 0 && p >= ' ' && p < 0x7f) {
grzemich	0:d7bd7384a37c	1904	printer(arg, " ");
grzemich	0:d7bd7384a37c	1905	print_string((char*)p, len, printer, arg);
grzemich	0:d7bd7384a37c	1906	p += len;
grzemich	0:d7bd7384a37c	1907	len = 0;
grzemich	0:d7bd7384a37c	1908	}
grzemich	0:d7bd7384a37c	1909	break;
grzemich	0:d7bd7384a37c	1910
grzemich	0:d7bd7384a37c	1911	case ECHOREQ:
grzemich	0:d7bd7384a37c	1912	case ECHOREP:
grzemich	0:d7bd7384a37c	1913	case DISCREQ:
grzemich	0:d7bd7384a37c	1914	if (len >= 4) {
grzemich	0:d7bd7384a37c	1915	GETLONG(cilong, p);
grzemich	0:d7bd7384a37c	1916	printer(arg, " magic=0x%x", cilong);
grzemich	0:d7bd7384a37c	1917	p += 4;
grzemich	0:d7bd7384a37c	1918	len -= 4;
grzemich	0:d7bd7384a37c	1919	}
grzemich	0:d7bd7384a37c	1920	break;
grzemich	0:d7bd7384a37c	1921	}
grzemich	0:d7bd7384a37c	1922
grzemich	0:d7bd7384a37c	1923	/* print the rest of the bytes in the packet */
grzemich	0:d7bd7384a37c	1924	for (; len > 0; --len) {
grzemich	0:d7bd7384a37c	1925	GETCHAR(code, p);
grzemich	0:d7bd7384a37c	1926	printer(arg, " %.2x", code);
grzemich	0:d7bd7384a37c	1927	}
grzemich	0:d7bd7384a37c	1928
grzemich	0:d7bd7384a37c	1929	return (int)(p - pstart);
grzemich	0:d7bd7384a37c	1930	}
grzemich	0:d7bd7384a37c	1931	#endif /* PPP_ADDITIONAL_CALLBACKS */
grzemich	0:d7bd7384a37c	1932
grzemich	0:d7bd7384a37c	1933	/*
grzemich	0:d7bd7384a37c	1934	* Time to shut down the link because there is nothing out there.
grzemich	0:d7bd7384a37c	1935	*/
grzemich	0:d7bd7384a37c	1936	static void
grzemich	0:d7bd7384a37c	1937	LcpLinkFailure (fsm *f)
grzemich	0:d7bd7384a37c	1938	{
grzemich	0:d7bd7384a37c	1939	if (f->state == LS_OPENED) {
grzemich	0:d7bd7384a37c	1940	LCPDEBUG(LOG_INFO, ("No response to %d echo-requests\n", lcp_echos_pending));
grzemich	0:d7bd7384a37c	1941	LCPDEBUG(LOG_NOTICE, ("Serial link appears to be disconnected.\n"));
grzemich	0:d7bd7384a37c	1942	lcp_close(f->unit, "Peer not responding");
grzemich	0:d7bd7384a37c	1943	}
grzemich	0:d7bd7384a37c	1944	}
grzemich	0:d7bd7384a37c	1945
grzemich	0:d7bd7384a37c	1946	/*
grzemich	0:d7bd7384a37c	1947	* Timer expired for the LCP echo requests from this process.
grzemich	0:d7bd7384a37c	1948	*/
grzemich	0:d7bd7384a37c	1949	static void
grzemich	0:d7bd7384a37c	1950	LcpEchoCheck (fsm *f)
grzemich	0:d7bd7384a37c	1951	{
grzemich	0:d7bd7384a37c	1952	LcpSendEchoRequest (f);
grzemich	0:d7bd7384a37c	1953
grzemich	0:d7bd7384a37c	1954	/*
grzemich	0:d7bd7384a37c	1955	* Start the timer for the next interval.
grzemich	0:d7bd7384a37c	1956	*/
grzemich	0:d7bd7384a37c	1957	LWIP_ASSERT("lcp_echo_timer_running == 0", lcp_echo_timer_running == 0);
grzemich	0:d7bd7384a37c	1958
grzemich	0:d7bd7384a37c	1959	TIMEOUT (LcpEchoTimeout, f, lcp_echo_interval);
grzemich	0:d7bd7384a37c	1960	lcp_echo_timer_running = 1;
grzemich	0:d7bd7384a37c	1961	}
grzemich	0:d7bd7384a37c	1962
grzemich	0:d7bd7384a37c	1963	/*
grzemich	0:d7bd7384a37c	1964	* LcpEchoTimeout - Timer expired on the LCP echo
grzemich	0:d7bd7384a37c	1965	*/
grzemich	0:d7bd7384a37c	1966	static void
grzemich	0:d7bd7384a37c	1967	LcpEchoTimeout (void *arg)
grzemich	0:d7bd7384a37c	1968	{
grzemich	0:d7bd7384a37c	1969	if (lcp_echo_timer_running != 0) {
grzemich	0:d7bd7384a37c	1970	lcp_echo_timer_running = 0;
grzemich	0:d7bd7384a37c	1971	LcpEchoCheck ((fsm *) arg);
grzemich	0:d7bd7384a37c	1972	}
grzemich	0:d7bd7384a37c	1973	}
grzemich	0:d7bd7384a37c	1974
grzemich	0:d7bd7384a37c	1975	/*
grzemich	0:d7bd7384a37c	1976	* LcpEchoReply - LCP has received a reply to the echo
grzemich	0:d7bd7384a37c	1977	*/
grzemich	0:d7bd7384a37c	1978	static void
grzemich	0:d7bd7384a37c	1979	lcp_received_echo_reply (fsm f, int id, u_char inp, int len)
grzemich	0:d7bd7384a37c	1980	{
grzemich	0:d7bd7384a37c	1981	u32_t magic;
grzemich	0:d7bd7384a37c	1982
grzemich	0:d7bd7384a37c	1983	LWIP_UNUSED_ARG(id);
grzemich	0:d7bd7384a37c	1984
grzemich	0:d7bd7384a37c	1985	/* Check the magic number - don't count replies from ourselves. */
grzemich	0:d7bd7384a37c	1986	if (len < 4) {
grzemich	0:d7bd7384a37c	1987	LCPDEBUG(LOG_WARNING, ("lcp: received short Echo-Reply, length %d\n", len));
grzemich	0:d7bd7384a37c	1988	return;
grzemich	0:d7bd7384a37c	1989	}
grzemich	0:d7bd7384a37c	1990	GETLONG(magic, inp);
grzemich	0:d7bd7384a37c	1991	if (lcp_gotoptions[f->unit].neg_magicnumber && magic == lcp_gotoptions[f->unit].magicnumber) {
grzemich	0:d7bd7384a37c	1992	LCPDEBUG(LOG_WARNING, ("appear to have received our own echo-reply!\n"));
grzemich	0:d7bd7384a37c	1993	return;
grzemich	0:d7bd7384a37c	1994	}
grzemich	0:d7bd7384a37c	1995
grzemich	0:d7bd7384a37c	1996	/* Reset the number of outstanding echo frames */
grzemich	0:d7bd7384a37c	1997	lcp_echos_pending = 0;
grzemich	0:d7bd7384a37c	1998	}
grzemich	0:d7bd7384a37c	1999
grzemich	0:d7bd7384a37c	2000	/*
grzemich	0:d7bd7384a37c	2001	* LcpSendEchoRequest - Send an echo request frame to the peer
grzemich	0:d7bd7384a37c	2002	*/
grzemich	0:d7bd7384a37c	2003	static void
grzemich	0:d7bd7384a37c	2004	LcpSendEchoRequest (fsm *f)
grzemich	0:d7bd7384a37c	2005	{
grzemich	0:d7bd7384a37c	2006	u32_t lcp_magic;
grzemich	0:d7bd7384a37c	2007	u_char pkt[4], *pktp;
grzemich	0:d7bd7384a37c	2008
grzemich	0:d7bd7384a37c	2009	/*
grzemich	0:d7bd7384a37c	2010	* Detect the failure of the peer at this point.
grzemich	0:d7bd7384a37c	2011	*/
grzemich	0:d7bd7384a37c	2012	if (lcp_echo_fails != 0) {
grzemich	0:d7bd7384a37c	2013	if (lcp_echos_pending >= lcp_echo_fails) {
grzemich	0:d7bd7384a37c	2014	LcpLinkFailure(f);
grzemich	0:d7bd7384a37c	2015	lcp_echos_pending = 0;
grzemich	0:d7bd7384a37c	2016	}
grzemich	0:d7bd7384a37c	2017	}
grzemich	0:d7bd7384a37c	2018
grzemich	0:d7bd7384a37c	2019	/*
grzemich	0:d7bd7384a37c	2020	* Make and send the echo request frame.
grzemich	0:d7bd7384a37c	2021	*/
grzemich	0:d7bd7384a37c	2022	if (f->state == LS_OPENED) {
grzemich	0:d7bd7384a37c	2023	lcp_magic = lcp_gotoptions[f->unit].magicnumber;
grzemich	0:d7bd7384a37c	2024	pktp = pkt;
grzemich	0:d7bd7384a37c	2025	PUTLONG(lcp_magic, pktp);
grzemich	0:d7bd7384a37c	2026	fsm_sdata(f, ECHOREQ, (u_char)(lcp_echo_number++ & 0xFF), pkt, (int)(pktp - pkt));
grzemich	0:d7bd7384a37c	2027	++lcp_echos_pending;
grzemich	0:d7bd7384a37c	2028	}
grzemich	0:d7bd7384a37c	2029	}
grzemich	0:d7bd7384a37c	2030
grzemich	0:d7bd7384a37c	2031	/*
grzemich	0:d7bd7384a37c	2032	* lcp_echo_lowerup - Start the timer for the LCP frame
grzemich	0:d7bd7384a37c	2033	*/
grzemich	0:d7bd7384a37c	2034
grzemich	0:d7bd7384a37c	2035	static void
grzemich	0:d7bd7384a37c	2036	lcp_echo_lowerup (int unit)
grzemich	0:d7bd7384a37c	2037	{
grzemich	0:d7bd7384a37c	2038	fsm *f = &lcp_fsm[unit];
grzemich	0:d7bd7384a37c	2039
grzemich	0:d7bd7384a37c	2040	/* Clear the parameters for generating echo frames */
grzemich	0:d7bd7384a37c	2041	lcp_echos_pending = 0;
grzemich	0:d7bd7384a37c	2042	lcp_echo_number = 0;
grzemich	0:d7bd7384a37c	2043	lcp_echo_timer_running = 0;
grzemich	0:d7bd7384a37c	2044
grzemich	0:d7bd7384a37c	2045	/* If a timeout interval is specified then start the timer */
grzemich	0:d7bd7384a37c	2046	if (lcp_echo_interval != 0) {
grzemich	0:d7bd7384a37c	2047	LcpEchoCheck (f);
grzemich	0:d7bd7384a37c	2048	}
grzemich	0:d7bd7384a37c	2049	}
grzemich	0:d7bd7384a37c	2050
grzemich	0:d7bd7384a37c	2051	/*
grzemich	0:d7bd7384a37c	2052	* lcp_echo_lowerdown - Stop the timer for the LCP frame
grzemich	0:d7bd7384a37c	2053	*/
grzemich	0:d7bd7384a37c	2054
grzemich	0:d7bd7384a37c	2055	static void
grzemich	0:d7bd7384a37c	2056	lcp_echo_lowerdown (int unit)
grzemich	0:d7bd7384a37c	2057	{
grzemich	0:d7bd7384a37c	2058	fsm *f = &lcp_fsm[unit];
grzemich	0:d7bd7384a37c	2059
grzemich	0:d7bd7384a37c	2060	if (lcp_echo_timer_running != 0) {
grzemich	0:d7bd7384a37c	2061	UNTIMEOUT (LcpEchoTimeout, f);
grzemich	0:d7bd7384a37c	2062	lcp_echo_timer_running = 0;
grzemich	0:d7bd7384a37c	2063	}
grzemich	0:d7bd7384a37c	2064	}
grzemich	0:d7bd7384a37c	2065
grzemich	0:d7bd7384a37c	2066	#endif /* PPP_SUPPORT */

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Type:	Library
Created:	08 Dec 2016
Imports:	2280
Forks:	0
Commits:	1
Dependents:	6
Dependencies:	0
Followers:	37

lwip/netif/ppp/lcp.c@0:d7bd7384a37c, 2016-12-07 (annotated)

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