Bonjour - Bonjour/Zerconf library

Users » dirkx » Code » Bonjour

Dirk-Willem van Gulik (NXP/mbed) / Mbed 2 deprecated Bonjour

Bonjour/Zerconf library

lwip/netif/ppp/lcp.c@5:8e53abda9900, 2010-08-14 (annotated)

Committer:: dirkx
Date:: Sat Aug 14 15:54:31 2010 +0000
Revision:: 5:8e53abda9900
Parent:: 0:355018f44c9f

Who changed what in which revision?

User	Revision	Line number	New contents of line
dirkx	0:355018f44c9f	1	/*****************************************************************************
dirkx	0:355018f44c9f	2	* lcp.c - Network Link Control Protocol program file.
dirkx	0:355018f44c9f	3	*
dirkx	0:355018f44c9f	4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
dirkx	0:355018f44c9f	5	* portions Copyright (c) 1997 by Global Election Systems Inc.
dirkx	0:355018f44c9f	6	*
dirkx	0:355018f44c9f	7	* The authors hereby grant permission to use, copy, modify, distribute,
dirkx	0:355018f44c9f	8	* and license this software and its documentation for any purpose, provided
dirkx	0:355018f44c9f	9	* that existing copyright notices are retained in all copies and that this
dirkx	0:355018f44c9f	10	* notice and the following disclaimer are included verbatim in any
dirkx	0:355018f44c9f	11	* distributions. No written agreement, license, or royalty fee is required
dirkx	0:355018f44c9f	12	* for any of the authorized uses.
dirkx	0:355018f44c9f	13	*
dirkx	0:355018f44c9f	14	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
dirkx	0:355018f44c9f	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
dirkx	0:355018f44c9f	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
dirkx	0:355018f44c9f	17	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
dirkx	0:355018f44c9f	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
dirkx	0:355018f44c9f	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
dirkx	0:355018f44c9f	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
dirkx	0:355018f44c9f	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
dirkx	0:355018f44c9f	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
dirkx	0:355018f44c9f	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
dirkx	0:355018f44c9f	24	*
dirkx	0:355018f44c9f	25	******************************************************************************
dirkx	0:355018f44c9f	26	* REVISION HISTORY
dirkx	0:355018f44c9f	27	*
dirkx	0:355018f44c9f	28	* 03-01-01 Marc Boucher <marc@mbsi.ca>
dirkx	0:355018f44c9f	29	* Ported to lwIP.
dirkx	0:355018f44c9f	30	* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
dirkx	0:355018f44c9f	31	* Original.
dirkx	0:355018f44c9f	32	*****************************************************************************/
dirkx	0:355018f44c9f	33
dirkx	0:355018f44c9f	34	/*
dirkx	0:355018f44c9f	35	* lcp.c - PPP Link Control Protocol.
dirkx	0:355018f44c9f	36	*
dirkx	0:355018f44c9f	37	* Copyright (c) 1989 Carnegie Mellon University.
dirkx	0:355018f44c9f	38	* All rights reserved.
dirkx	0:355018f44c9f	39	*
dirkx	0:355018f44c9f	40	* Redistribution and use in source and binary forms are permitted
dirkx	0:355018f44c9f	41	* provided that the above copyright notice and this paragraph are
dirkx	0:355018f44c9f	42	* duplicated in all such forms and that any documentation,
dirkx	0:355018f44c9f	43	* advertising materials, and other materials related to such
dirkx	0:355018f44c9f	44	* distribution and use acknowledge that the software was developed
dirkx	0:355018f44c9f	45	* by Carnegie Mellon University. The name of the
dirkx	0:355018f44c9f	46	* University may not be used to endorse or promote products derived
dirkx	0:355018f44c9f	47	* from this software without specific prior written permission.
dirkx	0:355018f44c9f	48	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
dirkx	0:355018f44c9f	49	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
dirkx	0:355018f44c9f	50	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
dirkx	0:355018f44c9f	51	*/
dirkx	0:355018f44c9f	52
dirkx	0:355018f44c9f	53
dirkx	0:355018f44c9f	54	#include "lwip/opt.h"
dirkx	0:355018f44c9f	55
dirkx	0:355018f44c9f	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
dirkx	0:355018f44c9f	57
dirkx	0:355018f44c9f	58	#include "ppp.h"
dirkx	0:355018f44c9f	59	#include "pppdebug.h"
dirkx	0:355018f44c9f	60
dirkx	0:355018f44c9f	61	#include "fsm.h"
dirkx	0:355018f44c9f	62	#include "chap.h"
dirkx	0:355018f44c9f	63	#include "magic.h"
dirkx	0:355018f44c9f	64	#include "auth.h"
dirkx	0:355018f44c9f	65	#include "lcp.h"
dirkx	0:355018f44c9f	66
dirkx	0:355018f44c9f	67	#include <string.h>
dirkx	0:355018f44c9f	68
dirkx	0:355018f44c9f	69	#if PPPOE_SUPPORT
dirkx	0:355018f44c9f	70	#include "netif/ppp_oe.h"
dirkx	0:355018f44c9f	71	#else
dirkx	0:355018f44c9f	72	#define PPPOE_MAXMTU PPP_MAXMRU
dirkx	0:355018f44c9f	73	#endif
dirkx	0:355018f44c9f	74
dirkx	0:355018f44c9f	75	#if 0 /* UNUSED */
dirkx	0:355018f44c9f	76	/*
dirkx	0:355018f44c9f	77	* LCP-related command-line options.
dirkx	0:355018f44c9f	78	*/
dirkx	0:355018f44c9f	79	int lcp_echo_interval = 0; /* Interval between LCP echo-requests */
dirkx	0:355018f44c9f	80	int lcp_echo_fails = 0; /* Tolerance to unanswered echo-requests */
dirkx	0:355018f44c9f	81	bool lax_recv = 0; /* accept control chars in asyncmap */
dirkx	0:355018f44c9f	82
dirkx	0:355018f44c9f	83	static int setescape (char **);
dirkx	0:355018f44c9f	84
dirkx	0:355018f44c9f	85	static option_t lcp_option_list[] = {
dirkx	0:355018f44c9f	86	/* LCP options */
dirkx	0:355018f44c9f	87	/* list stripped for simplicity */
dirkx	0:355018f44c9f	88	{NULL}
dirkx	0:355018f44c9f	89	};
dirkx	0:355018f44c9f	90	#endif /* UNUSED */
dirkx	0:355018f44c9f	91
dirkx	0:355018f44c9f	92	/* options */
dirkx	0:355018f44c9f	93	LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */
dirkx	0:355018f44c9f	94	static u_int lcp_echo_interval = LCP_ECHOINTERVAL; /* Interval between LCP echo-requests */
dirkx	0:355018f44c9f	95	static u_int lcp_echo_fails = LCP_MAXECHOFAILS; /* Tolerance to unanswered echo-requests */
dirkx	0:355018f44c9f	96
dirkx	0:355018f44c9f	97	/* global vars */
dirkx	0:355018f44c9f	98	static fsm lcp_fsm[NUM_PPP]; /* LCP fsm structure (global)*/
dirkx	0:355018f44c9f	99	lcp_options lcp_wantoptions[NUM_PPP]; /* Options that we want to request */
dirkx	0:355018f44c9f	100	lcp_options lcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
dirkx	0:355018f44c9f	101	lcp_options lcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
dirkx	0:355018f44c9f	102	lcp_options lcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
dirkx	0:355018f44c9f	103	ext_accm xmit_accm[NUM_PPP]; /* extended transmit ACCM */
dirkx	0:355018f44c9f	104
dirkx	0:355018f44c9f	105	static u32_t lcp_echos_pending = 0; /* Number of outstanding echo msgs */
dirkx	0:355018f44c9f	106	static u32_t lcp_echo_number = 0; /* ID number of next echo frame */
dirkx	0:355018f44c9f	107	static u32_t lcp_echo_timer_running = 0; /* TRUE if a timer is running */
dirkx	0:355018f44c9f	108
dirkx	0:355018f44c9f	109	/* @todo: do we really need such a large buffer? The typical 1500 bytes seem too much. */
dirkx	0:355018f44c9f	110	static u_char nak_buffer[PPP_MRU] MEM_POSITION; /* where we construct a nak packet */
dirkx	0:355018f44c9f	111
dirkx	0:355018f44c9f	112	/*
dirkx	0:355018f44c9f	113	* Callbacks for fsm code. (CI = Configuration Information)
dirkx	0:355018f44c9f	114	*/
dirkx	0:355018f44c9f	115	static void lcp_resetci (fsm); / Reset our CI */
dirkx	0:355018f44c9f	116	static int lcp_cilen (fsm); / Return length of our CI */
dirkx	0:355018f44c9f	117	static void lcp_addci (fsm, u_char, int); / Add our CI to pkt */
dirkx	0:355018f44c9f	118	static int lcp_ackci (fsm, u_char, int); /* Peer ack'd our CI */
dirkx	0:355018f44c9f	119	static int lcp_nakci (fsm, u_char, int); /* Peer nak'd our CI */
dirkx	0:355018f44c9f	120	static int lcp_rejci (fsm, u_char, int); /* Peer rej'd our CI */
dirkx	0:355018f44c9f	121	static int lcp_reqci (fsm, u_char, int, int); / Rcv peer CI */
dirkx	0:355018f44c9f	122	static void lcp_up (fsm); / We're UP */
dirkx	0:355018f44c9f	123	static void lcp_down (fsm); / We're DOWN */
dirkx	0:355018f44c9f	124	static void lcp_starting (fsm); / We need lower layer up */
dirkx	0:355018f44c9f	125	static void lcp_finished (fsm); / We need lower layer down */
dirkx	0:355018f44c9f	126	static int lcp_extcode (fsm, int, u_char, u_char, int);
dirkx	0:355018f44c9f	127	static void lcp_rprotrej (fsm, u_char, int);
dirkx	0:355018f44c9f	128
dirkx	0:355018f44c9f	129	/*
dirkx	0:355018f44c9f	130	* routines to send LCP echos to peer
dirkx	0:355018f44c9f	131	*/
dirkx	0:355018f44c9f	132
dirkx	0:355018f44c9f	133	static void lcp_echo_lowerup (int);
dirkx	0:355018f44c9f	134	static void lcp_echo_lowerdown (int);
dirkx	0:355018f44c9f	135	static void LcpEchoTimeout (void*);
dirkx	0:355018f44c9f	136	static void lcp_received_echo_reply (fsm, int, u_char, int);
dirkx	0:355018f44c9f	137	static void LcpSendEchoRequest (fsm*);
dirkx	0:355018f44c9f	138	static void LcpLinkFailure (fsm*);
dirkx	0:355018f44c9f	139	static void LcpEchoCheck (fsm*);
dirkx	0:355018f44c9f	140
dirkx	0:355018f44c9f	141	static fsm_callbacks lcp_callbacks = { /* LCP callback routines */
dirkx	0:355018f44c9f	142	lcp_resetci, /* Reset our Configuration Information */
dirkx	0:355018f44c9f	143	lcp_cilen, /* Length of our Configuration Information */
dirkx	0:355018f44c9f	144	lcp_addci, /* Add our Configuration Information */
dirkx	0:355018f44c9f	145	lcp_ackci, /* ACK our Configuration Information */
dirkx	0:355018f44c9f	146	lcp_nakci, /* NAK our Configuration Information */
dirkx	0:355018f44c9f	147	lcp_rejci, /* Reject our Configuration Information */
dirkx	0:355018f44c9f	148	lcp_reqci, /* Request peer's Configuration Information */
dirkx	0:355018f44c9f	149	lcp_up, /* Called when fsm reaches LS_OPENED state */
dirkx	0:355018f44c9f	150	lcp_down, /* Called when fsm leaves LS_OPENED state */
dirkx	0:355018f44c9f	151	lcp_starting, /* Called when we want the lower layer up */
dirkx	0:355018f44c9f	152	lcp_finished, /* Called when we want the lower layer down */
dirkx	0:355018f44c9f	153	NULL, /* Called when Protocol-Reject received */
dirkx	0:355018f44c9f	154	NULL, /* Retransmission is necessary */
dirkx	0:355018f44c9f	155	lcp_extcode, /* Called to handle LCP-specific codes */
dirkx	0:355018f44c9f	156	"LCP" /* String name of protocol */
dirkx	0:355018f44c9f	157	};
dirkx	0:355018f44c9f	158
dirkx	0:355018f44c9f	159	/*
dirkx	0:355018f44c9f	160	* Protocol entry points.
dirkx	0:355018f44c9f	161	* Some of these are called directly.
dirkx	0:355018f44c9f	162	*/
dirkx	0:355018f44c9f	163
dirkx	0:355018f44c9f	164	static void lcp_input (int, u_char *, int);
dirkx	0:355018f44c9f	165	static void lcp_protrej (int);
dirkx	0:355018f44c9f	166
dirkx	0:355018f44c9f	167	struct protent lcp_protent = {
dirkx	0:355018f44c9f	168	PPP_LCP,
dirkx	0:355018f44c9f	169	lcp_init,
dirkx	0:355018f44c9f	170	lcp_input,
dirkx	0:355018f44c9f	171	lcp_protrej,
dirkx	0:355018f44c9f	172	lcp_lowerup,
dirkx	0:355018f44c9f	173	lcp_lowerdown,
dirkx	0:355018f44c9f	174	lcp_open,
dirkx	0:355018f44c9f	175	lcp_close,
dirkx	0:355018f44c9f	176	#if PPP_ADDITIONAL_CALLBACKS
dirkx	0:355018f44c9f	177	lcp_printpkt,
dirkx	0:355018f44c9f	178	NULL,
dirkx	0:355018f44c9f	179	#endif /* PPP_ADDITIONAL_CALLBACKS */
dirkx	0:355018f44c9f	180	1,
dirkx	0:355018f44c9f	181	"LCP",
dirkx	0:355018f44c9f	182	#if PPP_ADDITIONAL_CALLBACKS
dirkx	0:355018f44c9f	183	NULL,
dirkx	0:355018f44c9f	184	NULL,
dirkx	0:355018f44c9f	185	NULL
dirkx	0:355018f44c9f	186	#endif /* PPP_ADDITIONAL_CALLBACKS */
dirkx	0:355018f44c9f	187	};
dirkx	0:355018f44c9f	188
dirkx	0:355018f44c9f	189	int lcp_loopbackfail = DEFLOOPBACKFAIL;
dirkx	0:355018f44c9f	190
dirkx	0:355018f44c9f	191	/*
dirkx	0:355018f44c9f	192	* Length of each type of configuration option (in octets)
dirkx	0:355018f44c9f	193	*/
dirkx	0:355018f44c9f	194	#define CILEN_VOID 2
dirkx	0:355018f44c9f	195	#define CILEN_CHAR 3
dirkx	0:355018f44c9f	196	#define CILEN_SHORT 4 /* CILEN_VOID + sizeof(short) */
dirkx	0:355018f44c9f	197	#define CILEN_CHAP 5 /* CILEN_VOID + sizeof(short) + 1 */
dirkx	0:355018f44c9f	198	#define CILEN_LONG 6 /* CILEN_VOID + sizeof(long) */
dirkx	0:355018f44c9f	199	#define CILEN_LQR 8 /* CILEN_VOID + sizeof(short) + sizeof(long) */
dirkx	0:355018f44c9f	200	#define CILEN_CBCP 3
dirkx	0:355018f44c9f	201
dirkx	0:355018f44c9f	202	#define CODENAME(x) ((x) == CONFACK ? "ACK" : (x) == CONFNAK ? "NAK" : "REJ")
dirkx	0:355018f44c9f	203
dirkx	0:355018f44c9f	204	#if 0 /* UNUSED */
dirkx	0:355018f44c9f	205	/*
dirkx	0:355018f44c9f	206	* setescape - add chars to the set we escape on transmission.
dirkx	0:355018f44c9f	207	*/
dirkx	0:355018f44c9f	208	static int
dirkx	0:355018f44c9f	209	setescape(argv)
dirkx	0:355018f44c9f	210	char **argv;
dirkx	0:355018f44c9f	211	{
dirkx	0:355018f44c9f	212	int n, ret;
dirkx	0:355018f44c9f	213	char p, endp;
dirkx	0:355018f44c9f	214
dirkx	0:355018f44c9f	215	p = *argv;
dirkx	0:355018f44c9f	216	ret = 1;
dirkx	0:355018f44c9f	217	while (*p) {
dirkx	0:355018f44c9f	218	n = strtol(p, &endp, 16);
dirkx	0:355018f44c9f	219	if (p == endp) {
dirkx	0:355018f44c9f	220	option_error("escape parameter contains invalid hex number '%s'", p);
dirkx	0:355018f44c9f	221	return 0;
dirkx	0:355018f44c9f	222	}
dirkx	0:355018f44c9f	223	p = endp;
dirkx	0:355018f44c9f	224	if (n < 0 \|\| n == 0x5E \|\| n > 0xFF) {
dirkx	0:355018f44c9f	225	option_error("can't escape character 0x%x", n);
dirkx	0:355018f44c9f	226	ret = 0;
dirkx	0:355018f44c9f	227	} else
dirkx	0:355018f44c9f	228	xmit_accm[0][n >> 5] \|= 1 << (n & 0x1F);
dirkx	0:355018f44c9f	229	while (p == ',' \|\| p == ' ')
dirkx	0:355018f44c9f	230	++p;
dirkx	0:355018f44c9f	231	}
dirkx	0:355018f44c9f	232	return ret;
dirkx	0:355018f44c9f	233	}
dirkx	0:355018f44c9f	234	#endif /* UNUSED */
dirkx	0:355018f44c9f	235
dirkx	0:355018f44c9f	236	/*
dirkx	0:355018f44c9f	237	* lcp_init - Initialize LCP.
dirkx	0:355018f44c9f	238	*/
dirkx	0:355018f44c9f	239	void
dirkx	0:355018f44c9f	240	lcp_init(int unit)
dirkx	0:355018f44c9f	241	{
dirkx	0:355018f44c9f	242	fsm *f = &lcp_fsm[unit];
dirkx	0:355018f44c9f	243	lcp_options *wo = &lcp_wantoptions[unit];
dirkx	0:355018f44c9f	244	lcp_options *ao = &lcp_allowoptions[unit];
dirkx	0:355018f44c9f	245
dirkx	0:355018f44c9f	246	f->unit = unit;
dirkx	0:355018f44c9f	247	f->protocol = PPP_LCP;
dirkx	0:355018f44c9f	248	f->callbacks = &lcp_callbacks;
dirkx	0:355018f44c9f	249
dirkx	0:355018f44c9f	250	fsm_init(f);
dirkx	0:355018f44c9f	251
dirkx	0:355018f44c9f	252	wo->passive = 0;
dirkx	0:355018f44c9f	253	wo->silent = 0;
dirkx	0:355018f44c9f	254	wo->restart = 0; /* Set to 1 in kernels or multi-line implementations */
dirkx	0:355018f44c9f	255	wo->neg_mru = 1;
dirkx	0:355018f44c9f	256	wo->mru = PPP_DEFMRU;
dirkx	0:355018f44c9f	257	wo->neg_asyncmap = 1;
dirkx	0:355018f44c9f	258	wo->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
dirkx	0:355018f44c9f	259	wo->neg_chap = 0; /* Set to 1 on server */
dirkx	0:355018f44c9f	260	wo->neg_upap = 0; /* Set to 1 on server */
dirkx	0:355018f44c9f	261	wo->chap_mdtype = CHAP_DIGEST_MD5;
dirkx	0:355018f44c9f	262	wo->neg_magicnumber = 1;
dirkx	0:355018f44c9f	263	wo->neg_pcompression = 1;
dirkx	0:355018f44c9f	264	wo->neg_accompression = 1;
dirkx	0:355018f44c9f	265	wo->neg_lqr = 0; /* no LQR implementation yet */
dirkx	0:355018f44c9f	266	wo->neg_cbcp = 0;
dirkx	0:355018f44c9f	267
dirkx	0:355018f44c9f	268	ao->neg_mru = 1;
dirkx	0:355018f44c9f	269	ao->mru = PPP_MAXMRU;
dirkx	0:355018f44c9f	270	ao->neg_asyncmap = 1;
dirkx	0:355018f44c9f	271	ao->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
dirkx	0:355018f44c9f	272	ao->neg_chap = (CHAP_SUPPORT != 0);
dirkx	0:355018f44c9f	273	ao->chap_mdtype = CHAP_DIGEST_MD5;
dirkx	0:355018f44c9f	274	ao->neg_upap = (PAP_SUPPORT != 0);
dirkx	0:355018f44c9f	275	ao->neg_magicnumber = 1;
dirkx	0:355018f44c9f	276	ao->neg_pcompression = 1;
dirkx	0:355018f44c9f	277	ao->neg_accompression = 1;
dirkx	0:355018f44c9f	278	ao->neg_lqr = 0; /* no LQR implementation yet */
dirkx	0:355018f44c9f	279	ao->neg_cbcp = (CBCP_SUPPORT != 0);
dirkx	0:355018f44c9f	280
dirkx	0:355018f44c9f	281	/*
dirkx	0:355018f44c9f	282	* Set transmit escape for the flag and escape characters plus anything
dirkx	0:355018f44c9f	283	* set for the allowable options.
dirkx	0:355018f44c9f	284	*/
dirkx	0:355018f44c9f	285	memset(xmit_accm[unit], 0, sizeof(xmit_accm[0]));
dirkx	0:355018f44c9f	286	xmit_accm[unit][15] = 0x60;
dirkx	0:355018f44c9f	287	xmit_accm[unit][0] = (u_char)((ao->asyncmap & 0xFF));
dirkx	0:355018f44c9f	288	xmit_accm[unit][1] = (u_char)((ao->asyncmap >> 8) & 0xFF);
dirkx	0:355018f44c9f	289	xmit_accm[unit][2] = (u_char)((ao->asyncmap >> 16) & 0xFF);
dirkx	0:355018f44c9f	290	xmit_accm[unit][3] = (u_char)((ao->asyncmap >> 24) & 0xFF);
dirkx	0:355018f44c9f	291	LCPDEBUG(LOG_INFO, ("lcp_init: xmit_accm=%X %X %X %X\n",
dirkx	0:355018f44c9f	292	xmit_accm[unit][0],
dirkx	0:355018f44c9f	293	xmit_accm[unit][1],
dirkx	0:355018f44c9f	294	xmit_accm[unit][2],
dirkx	0:355018f44c9f	295	xmit_accm[unit][3]));
dirkx	0:355018f44c9f	296
dirkx	0:355018f44c9f	297	lcp_phase[unit] = PHASE_INITIALIZE;
dirkx	0:355018f44c9f	298	}
dirkx	0:355018f44c9f	299
dirkx	0:355018f44c9f	300
dirkx	0:355018f44c9f	301	/*
dirkx	0:355018f44c9f	302	* lcp_open - LCP is allowed to come up.
dirkx	0:355018f44c9f	303	*/
dirkx	0:355018f44c9f	304	void
dirkx	0:355018f44c9f	305	lcp_open(int unit)
dirkx	0:355018f44c9f	306	{
dirkx	0:355018f44c9f	307	fsm *f = &lcp_fsm[unit];
dirkx	0:355018f44c9f	308	lcp_options *wo = &lcp_wantoptions[unit];
dirkx	0:355018f44c9f	309
dirkx	0:355018f44c9f	310	f->flags = 0;
dirkx	0:355018f44c9f	311	if (wo->passive) {
dirkx	0:355018f44c9f	312	f->flags \|= OPT_PASSIVE;
dirkx	0:355018f44c9f	313	}
dirkx	0:355018f44c9f	314	if (wo->silent) {
dirkx	0:355018f44c9f	315	f->flags \|= OPT_SILENT;
dirkx	0:355018f44c9f	316	}
dirkx	0:355018f44c9f	317	fsm_open(f);
dirkx	0:355018f44c9f	318
dirkx	0:355018f44c9f	319	lcp_phase[unit] = PHASE_ESTABLISH;
dirkx	0:355018f44c9f	320	}
dirkx	0:355018f44c9f	321
dirkx	0:355018f44c9f	322
dirkx	0:355018f44c9f	323	/*
dirkx	0:355018f44c9f	324	* lcp_close - Take LCP down.
dirkx	0:355018f44c9f	325	*/
dirkx	0:355018f44c9f	326	void
dirkx	0:355018f44c9f	327	lcp_close(int unit, char *reason)
dirkx	0:355018f44c9f	328	{
dirkx	0:355018f44c9f	329	fsm *f = &lcp_fsm[unit];
dirkx	0:355018f44c9f	330
dirkx	0:355018f44c9f	331	if (lcp_phase[unit] != PHASE_DEAD) {
dirkx	0:355018f44c9f	332	lcp_phase[unit] = PHASE_TERMINATE;
dirkx	0:355018f44c9f	333	}
dirkx	0:355018f44c9f	334	if (f->state == LS_STOPPED && f->flags & (OPT_PASSIVE\|OPT_SILENT)) {
dirkx	0:355018f44c9f	335	/*
dirkx	0:355018f44c9f	336	* This action is not strictly according to the FSM in RFC1548,
dirkx	0:355018f44c9f	337	* but it does mean that the program terminates if you do an
dirkx	0:355018f44c9f	338	* lcp_close() in passive/silent mode when a connection hasn't
dirkx	0:355018f44c9f	339	* been established.
dirkx	0:355018f44c9f	340	*/
dirkx	0:355018f44c9f	341	f->state = LS_CLOSED;
dirkx	0:355018f44c9f	342	lcp_finished(f);
dirkx	0:355018f44c9f	343	} else {
dirkx	0:355018f44c9f	344	fsm_close(f, reason);
dirkx	0:355018f44c9f	345	}
dirkx	0:355018f44c9f	346	}
dirkx	0:355018f44c9f	347
dirkx	0:355018f44c9f	348
dirkx	0:355018f44c9f	349	/*
dirkx	0:355018f44c9f	350	* lcp_lowerup - The lower layer is up.
dirkx	0:355018f44c9f	351	*/
dirkx	0:355018f44c9f	352	void
dirkx	0:355018f44c9f	353	lcp_lowerup(int unit)
dirkx	0:355018f44c9f	354	{
dirkx	0:355018f44c9f	355	lcp_options *wo = &lcp_wantoptions[unit];
dirkx	0:355018f44c9f	356
dirkx	0:355018f44c9f	357	/*
dirkx	0:355018f44c9f	358	* Don't use A/C or protocol compression on transmission,
dirkx	0:355018f44c9f	359	* but accept A/C and protocol compressed packets
dirkx	0:355018f44c9f	360	* if we are going to ask for A/C and protocol compression.
dirkx	0:355018f44c9f	361	*/
dirkx	0:355018f44c9f	362	ppp_set_xaccm(unit, &xmit_accm[unit]);
dirkx	0:355018f44c9f	363	ppp_send_config(unit, PPP_MRU, 0xffffffffl, 0, 0);
dirkx	0:355018f44c9f	364	ppp_recv_config(unit, PPP_MRU, 0x00000000l,
dirkx	0:355018f44c9f	365	wo->neg_pcompression, wo->neg_accompression);
dirkx	0:355018f44c9f	366	peer_mru[unit] = PPP_MRU;
dirkx	0:355018f44c9f	367	lcp_allowoptions[unit].asyncmap = (u_long)xmit_accm[unit][0]
dirkx	0:355018f44c9f	368	\| ((u_long)xmit_accm[unit][1] << 8)
dirkx	0:355018f44c9f	369	\| ((u_long)xmit_accm[unit][2] << 16)
dirkx	0:355018f44c9f	370	\| ((u_long)xmit_accm[unit][3] << 24);
dirkx	0:355018f44c9f	371	LCPDEBUG(LOG_INFO, ("lcp_lowerup: asyncmap=%X %X %X %X\n",
dirkx	0:355018f44c9f	372	xmit_accm[unit][3],
dirkx	0:355018f44c9f	373	xmit_accm[unit][2],
dirkx	0:355018f44c9f	374	xmit_accm[unit][1],
dirkx	0:355018f44c9f	375	xmit_accm[unit][0]));
dirkx	0:355018f44c9f	376
dirkx	0:355018f44c9f	377	fsm_lowerup(&lcp_fsm[unit]);
dirkx	0:355018f44c9f	378	}
dirkx	0:355018f44c9f	379
dirkx	0:355018f44c9f	380
dirkx	0:355018f44c9f	381	/*
dirkx	0:355018f44c9f	382	* lcp_lowerdown - The lower layer is down.
dirkx	0:355018f44c9f	383	*/
dirkx	0:355018f44c9f	384	void
dirkx	0:355018f44c9f	385	lcp_lowerdown(int unit)
dirkx	0:355018f44c9f	386	{
dirkx	0:355018f44c9f	387	fsm_lowerdown(&lcp_fsm[unit]);
dirkx	0:355018f44c9f	388	}
dirkx	0:355018f44c9f	389
dirkx	0:355018f44c9f	390
dirkx	0:355018f44c9f	391	/*
dirkx	0:355018f44c9f	392	* lcp_input - Input LCP packet.
dirkx	0:355018f44c9f	393	*/
dirkx	0:355018f44c9f	394	static void
dirkx	0:355018f44c9f	395	lcp_input(int unit, u_char *p, int len)
dirkx	0:355018f44c9f	396	{
dirkx	0:355018f44c9f	397	fsm *f = &lcp_fsm[unit];
dirkx	0:355018f44c9f	398
dirkx	0:355018f44c9f	399	fsm_input(f, p, len);
dirkx	0:355018f44c9f	400	}
dirkx	0:355018f44c9f	401
dirkx	0:355018f44c9f	402
dirkx	0:355018f44c9f	403	/*
dirkx	0:355018f44c9f	404	* lcp_extcode - Handle a LCP-specific code.
dirkx	0:355018f44c9f	405	*/
dirkx	0:355018f44c9f	406	static int
dirkx	0:355018f44c9f	407	lcp_extcode(fsm f, int code, u_char id, u_char inp, int len)
dirkx	0:355018f44c9f	408	{
dirkx	0:355018f44c9f	409	u_char *magp;
dirkx	0:355018f44c9f	410
dirkx	0:355018f44c9f	411	switch( code ){
dirkx	0:355018f44c9f	412	case PROTREJ:
dirkx	0:355018f44c9f	413	lcp_rprotrej(f, inp, len);
dirkx	0:355018f44c9f	414	break;
dirkx	0:355018f44c9f	415
dirkx	0:355018f44c9f	416	case ECHOREQ:
dirkx	0:355018f44c9f	417	if (f->state != LS_OPENED) {
dirkx	0:355018f44c9f	418	break;
dirkx	0:355018f44c9f	419	}
dirkx	0:355018f44c9f	420	LCPDEBUG(LOG_INFO, ("lcp: Echo-Request, Rcvd id %d\n", id));
dirkx	0:355018f44c9f	421	magp = inp;
dirkx	0:355018f44c9f	422	PUTLONG(lcp_gotoptions[f->unit].magicnumber, magp);
dirkx	0:355018f44c9f	423	fsm_sdata(f, ECHOREP, id, inp, len);
dirkx	0:355018f44c9f	424	break;
dirkx	0:355018f44c9f	425
dirkx	0:355018f44c9f	426	case ECHOREP:
dirkx	0:355018f44c9f	427	lcp_received_echo_reply(f, id, inp, len);
dirkx	0:355018f44c9f	428	break;
dirkx	0:355018f44c9f	429
dirkx	0:355018f44c9f	430	case DISCREQ:
dirkx	0:355018f44c9f	431	break;
dirkx	0:355018f44c9f	432
dirkx	0:355018f44c9f	433	default:
dirkx	0:355018f44c9f	434	return 0;
dirkx	0:355018f44c9f	435	}
dirkx	0:355018f44c9f	436	return 1;
dirkx	0:355018f44c9f	437	}
dirkx	0:355018f44c9f	438
dirkx	0:355018f44c9f	439
dirkx	0:355018f44c9f	440	/*
dirkx	0:355018f44c9f	441	* lcp_rprotrej - Receive an Protocol-Reject.
dirkx	0:355018f44c9f	442	*
dirkx	0:355018f44c9f	443	* Figure out which protocol is rejected and inform it.
dirkx	0:355018f44c9f	444	*/
dirkx	0:355018f44c9f	445	static void
dirkx	0:355018f44c9f	446	lcp_rprotrej(fsm f, u_char inp, int len)
dirkx	0:355018f44c9f	447	{
dirkx	0:355018f44c9f	448	int i;
dirkx	0:355018f44c9f	449	struct protent *protp;
dirkx	0:355018f44c9f	450	u_short prot;
dirkx	0:355018f44c9f	451
dirkx	0:355018f44c9f	452	if (len < (int)sizeof (u_short)) {
dirkx	0:355018f44c9f	453	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd short Protocol-Reject packet!\n"));
dirkx	0:355018f44c9f	454	return;
dirkx	0:355018f44c9f	455	}
dirkx	0:355018f44c9f	456
dirkx	0:355018f44c9f	457	GETSHORT(prot, inp);
dirkx	0:355018f44c9f	458
dirkx	0:355018f44c9f	459	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd Protocol-Reject packet for %x!\n", prot));
dirkx	0:355018f44c9f	460
dirkx	0:355018f44c9f	461	/*
dirkx	0:355018f44c9f	462	* Protocol-Reject packets received in any state other than the LCP
dirkx	0:355018f44c9f	463	* LS_OPENED state SHOULD be silently discarded.
dirkx	0:355018f44c9f	464	*/
dirkx	0:355018f44c9f	465	if( f->state != LS_OPENED ) {
dirkx	0:355018f44c9f	466	LCPDEBUG(LOG_INFO, ("Protocol-Reject discarded: LCP in state %d\n", f->state));
dirkx	0:355018f44c9f	467	return;
dirkx	0:355018f44c9f	468	}
dirkx	0:355018f44c9f	469
dirkx	0:355018f44c9f	470	/*
dirkx	0:355018f44c9f	471	* Upcall the proper Protocol-Reject routine.
dirkx	0:355018f44c9f	472	*/
dirkx	0:355018f44c9f	473	for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
dirkx	0:355018f44c9f	474	if (protp->protocol == prot && protp->enabled_flag) {
dirkx	0:355018f44c9f	475	(*protp->protrej)(f->unit);
dirkx	0:355018f44c9f	476	return;
dirkx	0:355018f44c9f	477	}
dirkx	0:355018f44c9f	478	}
dirkx	0:355018f44c9f	479
dirkx	0:355018f44c9f	480	LCPDEBUG(LOG_WARNING, ("Protocol-Reject for unsupported protocol 0x%x\n", prot));
dirkx	0:355018f44c9f	481	}
dirkx	0:355018f44c9f	482
dirkx	0:355018f44c9f	483
dirkx	0:355018f44c9f	484	/*
dirkx	0:355018f44c9f	485	* lcp_protrej - A Protocol-Reject was received.
dirkx	0:355018f44c9f	486	*/
dirkx	0:355018f44c9f	487	static void
dirkx	0:355018f44c9f	488	lcp_protrej(int unit)
dirkx	0:355018f44c9f	489	{
dirkx	0:355018f44c9f	490	LWIP_UNUSED_ARG(unit);
dirkx	0:355018f44c9f	491	/*
dirkx	0:355018f44c9f	492	* Can't reject LCP!
dirkx	0:355018f44c9f	493	*/
dirkx	0:355018f44c9f	494	LCPDEBUG(LOG_WARNING, ("lcp_protrej: Received Protocol-Reject for LCP!\n"));
dirkx	0:355018f44c9f	495	fsm_protreject(&lcp_fsm[unit]);
dirkx	0:355018f44c9f	496	}
dirkx	0:355018f44c9f	497
dirkx	0:355018f44c9f	498
dirkx	0:355018f44c9f	499	/*
dirkx	0:355018f44c9f	500	* lcp_sprotrej - Send a Protocol-Reject for some protocol.
dirkx	0:355018f44c9f	501	*/
dirkx	0:355018f44c9f	502	void
dirkx	0:355018f44c9f	503	lcp_sprotrej(int unit, u_char *p, int len)
dirkx	0:355018f44c9f	504	{
dirkx	0:355018f44c9f	505	/*
dirkx	0:355018f44c9f	506	* Send back the protocol and the information field of the
dirkx	0:355018f44c9f	507	* rejected packet. We only get here if LCP is in the LS_OPENED state.
dirkx	0:355018f44c9f	508	*/
dirkx	0:355018f44c9f	509
dirkx	0:355018f44c9f	510	fsm_sdata(&lcp_fsm[unit], PROTREJ, ++lcp_fsm[unit].id, p, len);
dirkx	0:355018f44c9f	511	}
dirkx	0:355018f44c9f	512
dirkx	0:355018f44c9f	513
dirkx	0:355018f44c9f	514	/*
dirkx	0:355018f44c9f	515	* lcp_resetci - Reset our CI.
dirkx	0:355018f44c9f	516	*/
dirkx	0:355018f44c9f	517	static void
dirkx	0:355018f44c9f	518	lcp_resetci(fsm *f)
dirkx	0:355018f44c9f	519	{
dirkx	0:355018f44c9f	520	lcp_wantoptions[f->unit].magicnumber = magic();
dirkx	0:355018f44c9f	521	lcp_wantoptions[f->unit].numloops = 0;
dirkx	0:355018f44c9f	522	lcp_gotoptions[f->unit] = lcp_wantoptions[f->unit];
dirkx	0:355018f44c9f	523	peer_mru[f->unit] = PPP_MRU;
dirkx	0:355018f44c9f	524	auth_reset(f->unit);
dirkx	0:355018f44c9f	525	}
dirkx	0:355018f44c9f	526
dirkx	0:355018f44c9f	527
dirkx	0:355018f44c9f	528	/*
dirkx	0:355018f44c9f	529	* lcp_cilen - Return length of our CI.
dirkx	0:355018f44c9f	530	*/
dirkx	0:355018f44c9f	531	static int
dirkx	0:355018f44c9f	532	lcp_cilen(fsm *f)
dirkx	0:355018f44c9f	533	{
dirkx	0:355018f44c9f	534	lcp_options *go = &lcp_gotoptions[f->unit];
dirkx	0:355018f44c9f	535
dirkx	0:355018f44c9f	536	#define LENCIVOID(neg) ((neg) ? CILEN_VOID : 0)
dirkx	0:355018f44c9f	537	#define LENCICHAP(neg) ((neg) ? CILEN_CHAP : 0)
dirkx	0:355018f44c9f	538	#define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0)
dirkx	0:355018f44c9f	539	#define LENCILONG(neg) ((neg) ? CILEN_LONG : 0)
dirkx	0:355018f44c9f	540	#define LENCILQR(neg) ((neg) ? CILEN_LQR: 0)
dirkx	0:355018f44c9f	541	#define LENCICBCP(neg) ((neg) ? CILEN_CBCP: 0)
dirkx	0:355018f44c9f	542	/*
dirkx	0:355018f44c9f	543	* NB: we only ask for one of CHAP and UPAP, even if we will
dirkx	0:355018f44c9f	544	* accept either.
dirkx	0:355018f44c9f	545	*/
dirkx	0:355018f44c9f	546	return (LENCISHORT(go->neg_mru && go->mru != PPP_DEFMRU) +
dirkx	0:355018f44c9f	547	LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) +
dirkx	0:355018f44c9f	548	LENCICHAP(go->neg_chap) +
dirkx	0:355018f44c9f	549	LENCISHORT(!go->neg_chap && go->neg_upap) +
dirkx	0:355018f44c9f	550	LENCILQR(go->neg_lqr) +
dirkx	0:355018f44c9f	551	LENCICBCP(go->neg_cbcp) +
dirkx	0:355018f44c9f	552	LENCILONG(go->neg_magicnumber) +
dirkx	0:355018f44c9f	553	LENCIVOID(go->neg_pcompression) +
dirkx	0:355018f44c9f	554	LENCIVOID(go->neg_accompression));
dirkx	0:355018f44c9f	555	}
dirkx	0:355018f44c9f	556
dirkx	0:355018f44c9f	557
dirkx	0:355018f44c9f	558	/*
dirkx	0:355018f44c9f	559	* lcp_addci - Add our desired CIs to a packet.
dirkx	0:355018f44c9f	560	*/
dirkx	0:355018f44c9f	561	static void
dirkx	0:355018f44c9f	562	lcp_addci(fsm f, u_char ucp, int *lenp)
dirkx	0:355018f44c9f	563	{
dirkx	0:355018f44c9f	564	lcp_options *go = &lcp_gotoptions[f->unit];
dirkx	0:355018f44c9f	565	u_char *start_ucp = ucp;
dirkx	0:355018f44c9f	566
dirkx	0:355018f44c9f	567	#define ADDCIVOID(opt, neg) \
dirkx	0:355018f44c9f	568	if (neg) { \
dirkx	0:355018f44c9f	569	LCPDEBUG(LOG_INFO, ("lcp_addci: opt=%d\n", opt)); \
dirkx	0:355018f44c9f	570	PUTCHAR(opt, ucp); \
dirkx	0:355018f44c9f	571	PUTCHAR(CILEN_VOID, ucp); \
dirkx	0:355018f44c9f	572	}
dirkx	0:355018f44c9f	573	#define ADDCISHORT(opt, neg, val) \
dirkx	0:355018f44c9f	574	if (neg) { \
dirkx	0:355018f44c9f	575	LCPDEBUG(LOG_INFO, ("lcp_addci: INT opt=%d %X\n", opt, val)); \
dirkx	0:355018f44c9f	576	PUTCHAR(opt, ucp); \
dirkx	0:355018f44c9f	577	PUTCHAR(CILEN_SHORT, ucp); \
dirkx	0:355018f44c9f	578	PUTSHORT(val, ucp); \
dirkx	0:355018f44c9f	579	}
dirkx	0:355018f44c9f	580	#define ADDCICHAP(opt, neg, val, digest) \
dirkx	0:355018f44c9f	581	if (neg) { \
dirkx	0:355018f44c9f	582	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAP opt=%d %X\n", opt, val)); \
dirkx	0:355018f44c9f	583	PUTCHAR(opt, ucp); \
dirkx	0:355018f44c9f	584	PUTCHAR(CILEN_CHAP, ucp); \
dirkx	0:355018f44c9f	585	PUTSHORT(val, ucp); \
dirkx	0:355018f44c9f	586	PUTCHAR(digest, ucp); \
dirkx	0:355018f44c9f	587	}
dirkx	0:355018f44c9f	588	#define ADDCILONG(opt, neg, val) \
dirkx	0:355018f44c9f	589	if (neg) { \
dirkx	0:355018f44c9f	590	LCPDEBUG(LOG_INFO, ("lcp_addci: L opt=%d %lX\n", opt, val)); \
dirkx	0:355018f44c9f	591	PUTCHAR(opt, ucp); \
dirkx	0:355018f44c9f	592	PUTCHAR(CILEN_LONG, ucp); \
dirkx	0:355018f44c9f	593	PUTLONG(val, ucp); \
dirkx	0:355018f44c9f	594	}
dirkx	0:355018f44c9f	595	#define ADDCILQR(opt, neg, val) \
dirkx	0:355018f44c9f	596	if (neg) { \
dirkx	0:355018f44c9f	597	LCPDEBUG(LOG_INFO, ("lcp_addci: LQR opt=%d %lX\n", opt, val)); \
dirkx	0:355018f44c9f	598	PUTCHAR(opt, ucp); \
dirkx	0:355018f44c9f	599	PUTCHAR(CILEN_LQR, ucp); \
dirkx	0:355018f44c9f	600	PUTSHORT(PPP_LQR, ucp); \
dirkx	0:355018f44c9f	601	PUTLONG(val, ucp); \
dirkx	0:355018f44c9f	602	}
dirkx	0:355018f44c9f	603	#define ADDCICHAR(opt, neg, val) \
dirkx	0:355018f44c9f	604	if (neg) { \
dirkx	0:355018f44c9f	605	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAR opt=%d %X '%z'\n", opt, val, val)); \
dirkx	0:355018f44c9f	606	PUTCHAR(opt, ucp); \
dirkx	0:355018f44c9f	607	PUTCHAR(CILEN_CHAR, ucp); \
dirkx	0:355018f44c9f	608	PUTCHAR(val, ucp); \
dirkx	0:355018f44c9f	609	}
dirkx	0:355018f44c9f	610
dirkx	0:355018f44c9f	611	ADDCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
dirkx	0:355018f44c9f	612	ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
dirkx	0:355018f44c9f	613	ADDCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
dirkx	0:355018f44c9f	614	ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
dirkx	0:355018f44c9f	615	ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
dirkx	0:355018f44c9f	616	ADDCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
dirkx	0:355018f44c9f	617	ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
dirkx	0:355018f44c9f	618	ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
dirkx	0:355018f44c9f	619	ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
dirkx	0:355018f44c9f	620
dirkx	0:355018f44c9f	621	if (ucp - start_ucp != *lenp) {
dirkx	0:355018f44c9f	622	/* this should never happen, because peer_mtu should be 1500 */
dirkx	0:355018f44c9f	623	LCPDEBUG(LOG_ERR, ("Bug in lcp_addci: wrong length\n"));
dirkx	0:355018f44c9f	624	}
dirkx	0:355018f44c9f	625	}
dirkx	0:355018f44c9f	626
dirkx	0:355018f44c9f	627
dirkx	0:355018f44c9f	628	/*
dirkx	0:355018f44c9f	629	* lcp_ackci - Ack our CIs.
dirkx	0:355018f44c9f	630	* This should not modify any state if the Ack is bad.
dirkx	0:355018f44c9f	631	*
dirkx	0:355018f44c9f	632	* Returns:
dirkx	0:355018f44c9f	633	* 0 - Ack was bad.
dirkx	0:355018f44c9f	634	* 1 - Ack was good.
dirkx	0:355018f44c9f	635	*/
dirkx	0:355018f44c9f	636	static int
dirkx	0:355018f44c9f	637	lcp_ackci(fsm f, u_char p, int len)
dirkx	0:355018f44c9f	638	{
dirkx	0:355018f44c9f	639	lcp_options *go = &lcp_gotoptions[f->unit];
dirkx	0:355018f44c9f	640	u_char cilen, citype, cichar;
dirkx	0:355018f44c9f	641	u_short cishort;
dirkx	0:355018f44c9f	642	u32_t cilong;
dirkx	0:355018f44c9f	643
dirkx	0:355018f44c9f	644	/*
dirkx	0:355018f44c9f	645	* CIs must be in exactly the same order that we sent.
dirkx	0:355018f44c9f	646	* Check packet length and CI length at each step.
dirkx	0:355018f44c9f	647	* If we find any deviations, then this packet is bad.
dirkx	0:355018f44c9f	648	*/
dirkx	0:355018f44c9f	649	#define ACKCIVOID(opt, neg) \
dirkx	0:355018f44c9f	650	if (neg) { \
dirkx	0:355018f44c9f	651	if ((len -= CILEN_VOID) < 0) \
dirkx	0:355018f44c9f	652	goto bad; \
dirkx	0:355018f44c9f	653	GETCHAR(citype, p); \
dirkx	0:355018f44c9f	654	GETCHAR(cilen, p); \
dirkx	0:355018f44c9f	655	if (cilen != CILEN_VOID \|\| citype != opt) \
dirkx	0:355018f44c9f	656	goto bad; \
dirkx	0:355018f44c9f	657	}
dirkx	0:355018f44c9f	658	#define ACKCISHORT(opt, neg, val) \
dirkx	0:355018f44c9f	659	if (neg) { \
dirkx	0:355018f44c9f	660	if ((len -= CILEN_SHORT) < 0) \
dirkx	0:355018f44c9f	661	goto bad; \
dirkx	0:355018f44c9f	662	GETCHAR(citype, p); \
dirkx	0:355018f44c9f	663	GETCHAR(cilen, p); \
dirkx	0:355018f44c9f	664	if (cilen != CILEN_SHORT \|\| citype != opt) \
dirkx	0:355018f44c9f	665	goto bad; \
dirkx	0:355018f44c9f	666	GETSHORT(cishort, p); \
dirkx	0:355018f44c9f	667	if (cishort != val) \
dirkx	0:355018f44c9f	668	goto bad; \
dirkx	0:355018f44c9f	669	}
dirkx	0:355018f44c9f	670	#define ACKCICHAR(opt, neg, val) \
dirkx	0:355018f44c9f	671	if (neg) { \
dirkx	0:355018f44c9f	672	if ((len -= CILEN_CHAR) < 0) \
dirkx	0:355018f44c9f	673	goto bad; \
dirkx	0:355018f44c9f	674	GETCHAR(citype, p); \
dirkx	0:355018f44c9f	675	GETCHAR(cilen, p); \
dirkx	0:355018f44c9f	676	if (cilen != CILEN_CHAR \|\| citype != opt) \
dirkx	0:355018f44c9f	677	goto bad; \
dirkx	0:355018f44c9f	678	GETCHAR(cichar, p); \
dirkx	0:355018f44c9f	679	if (cichar != val) \
dirkx	0:355018f44c9f	680	goto bad; \
dirkx	0:355018f44c9f	681	}
dirkx	0:355018f44c9f	682	#define ACKCICHAP(opt, neg, val, digest) \
dirkx	0:355018f44c9f	683	if (neg) { \
dirkx	0:355018f44c9f	684	if ((len -= CILEN_CHAP) < 0) \
dirkx	0:355018f44c9f	685	goto bad; \
dirkx	0:355018f44c9f	686	GETCHAR(citype, p); \
dirkx	0:355018f44c9f	687	GETCHAR(cilen, p); \
dirkx	0:355018f44c9f	688	if (cilen != CILEN_CHAP \|\| citype != opt) \
dirkx	0:355018f44c9f	689	goto bad; \
dirkx	0:355018f44c9f	690	GETSHORT(cishort, p); \
dirkx	0:355018f44c9f	691	if (cishort != val) \
dirkx	0:355018f44c9f	692	goto bad; \
dirkx	0:355018f44c9f	693	GETCHAR(cichar, p); \
dirkx	0:355018f44c9f	694	if (cichar != digest) \
dirkx	0:355018f44c9f	695	goto bad; \
dirkx	0:355018f44c9f	696	}
dirkx	0:355018f44c9f	697	#define ACKCILONG(opt, neg, val) \
dirkx	0:355018f44c9f	698	if (neg) { \
dirkx	0:355018f44c9f	699	if ((len -= CILEN_LONG) < 0) \
dirkx	0:355018f44c9f	700	goto bad; \
dirkx	0:355018f44c9f	701	GETCHAR(citype, p); \
dirkx	0:355018f44c9f	702	GETCHAR(cilen, p); \
dirkx	0:355018f44c9f	703	if (cilen != CILEN_LONG \|\| citype != opt) \
dirkx	0:355018f44c9f	704	goto bad; \
dirkx	0:355018f44c9f	705	GETLONG(cilong, p); \
dirkx	0:355018f44c9f	706	if (cilong != val) \
dirkx	0:355018f44c9f	707	goto bad; \
dirkx	0:355018f44c9f	708	}
dirkx	0:355018f44c9f	709	#define ACKCILQR(opt, neg, val) \
dirkx	0:355018f44c9f	710	if (neg) { \
dirkx	0:355018f44c9f	711	if ((len -= CILEN_LQR) < 0) \
dirkx	0:355018f44c9f	712	goto bad; \
dirkx	0:355018f44c9f	713	GETCHAR(citype, p); \
dirkx	0:355018f44c9f	714	GETCHAR(cilen, p); \
dirkx	0:355018f44c9f	715	if (cilen != CILEN_LQR \|\| citype != opt) \
dirkx	0:355018f44c9f	716	goto bad; \
dirkx	0:355018f44c9f	717	GETSHORT(cishort, p); \
dirkx	0:355018f44c9f	718	if (cishort != PPP_LQR) \
dirkx	0:355018f44c9f	719	goto bad; \
dirkx	0:355018f44c9f	720	GETLONG(cilong, p); \
dirkx	0:355018f44c9f	721	if (cilong != val) \
dirkx	0:355018f44c9f	722	goto bad; \
dirkx	0:355018f44c9f	723	}
dirkx	0:355018f44c9f	724
dirkx	0:355018f44c9f	725	ACKCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
dirkx	0:355018f44c9f	726	ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
dirkx	0:355018f44c9f	727	ACKCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
dirkx	0:355018f44c9f	728	ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
dirkx	0:355018f44c9f	729	ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
dirkx	0:355018f44c9f	730	ACKCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
dirkx	0:355018f44c9f	731	ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
dirkx	0:355018f44c9f	732	ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
dirkx	0:355018f44c9f	733	ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
dirkx	0:355018f44c9f	734
dirkx	0:355018f44c9f	735	/*
dirkx	0:355018f44c9f	736	* If there are any remaining CIs, then this packet is bad.
dirkx	0:355018f44c9f	737	*/
dirkx	0:355018f44c9f	738	if (len != 0) {
dirkx	0:355018f44c9f	739	goto bad;
dirkx	0:355018f44c9f	740	}
dirkx	0:355018f44c9f	741	LCPDEBUG(LOG_INFO, ("lcp_acki: Ack\n"));
dirkx	0:355018f44c9f	742	return (1);
dirkx	0:355018f44c9f	743	bad:
dirkx	0:355018f44c9f	744	LCPDEBUG(LOG_WARNING, ("lcp_acki: received bad Ack!\n"));
dirkx	0:355018f44c9f	745	return (0);
dirkx	0:355018f44c9f	746	}
dirkx	0:355018f44c9f	747
dirkx	0:355018f44c9f	748
dirkx	0:355018f44c9f	749	/*
dirkx	0:355018f44c9f	750	* lcp_nakci - Peer has sent a NAK for some of our CIs.
dirkx	0:355018f44c9f	751	* This should not modify any state if the Nak is bad
dirkx	0:355018f44c9f	752	* or if LCP is in the LS_OPENED state.
dirkx	0:355018f44c9f	753	*
dirkx	0:355018f44c9f	754	* Returns:
dirkx	0:355018f44c9f	755	* 0 - Nak was bad.
dirkx	0:355018f44c9f	756	* 1 - Nak was good.
dirkx	0:355018f44c9f	757	*/
dirkx	0:355018f44c9f	758	static int
dirkx	0:355018f44c9f	759	lcp_nakci(fsm f, u_char p, int len)
dirkx	0:355018f44c9f	760	{
dirkx	0:355018f44c9f	761	lcp_options *go = &lcp_gotoptions[f->unit];
dirkx	0:355018f44c9f	762	lcp_options *wo = &lcp_wantoptions[f->unit];
dirkx	0:355018f44c9f	763	u_char citype, cichar, *next;
dirkx	0:355018f44c9f	764	u_short cishort;
dirkx	0:355018f44c9f	765	u32_t cilong;
dirkx	0:355018f44c9f	766	lcp_options no; /* options we've seen Naks for */
dirkx	0:355018f44c9f	767	lcp_options try; /* options to request next time */
dirkx	0:355018f44c9f	768	int looped_back = 0;
dirkx	0:355018f44c9f	769	int cilen;
dirkx	0:355018f44c9f	770
dirkx	0:355018f44c9f	771	BZERO(&no, sizeof(no));
dirkx	0:355018f44c9f	772	try = *go;
dirkx	0:355018f44c9f	773
dirkx	0:355018f44c9f	774	/*
dirkx	0:355018f44c9f	775	* Any Nak'd CIs must be in exactly the same order that we sent.
dirkx	0:355018f44c9f	776	* Check packet length and CI length at each step.
dirkx	0:355018f44c9f	777	* If we find any deviations, then this packet is bad.
dirkx	0:355018f44c9f	778	*/
dirkx	0:355018f44c9f	779	#define NAKCIVOID(opt, neg, code) \
dirkx	0:355018f44c9f	780	if (go->neg && \
dirkx	0:355018f44c9f	781	len >= CILEN_VOID && \
dirkx	0:355018f44c9f	782	p[1] == CILEN_VOID && \
dirkx	0:355018f44c9f	783	p[0] == opt) { \
dirkx	0:355018f44c9f	784	len -= CILEN_VOID; \
dirkx	0:355018f44c9f	785	INCPTR(CILEN_VOID, p); \
dirkx	0:355018f44c9f	786	no.neg = 1; \
dirkx	0:355018f44c9f	787	code \
dirkx	0:355018f44c9f	788	}
dirkx	0:355018f44c9f	789	#define NAKCICHAP(opt, neg, code) \
dirkx	0:355018f44c9f	790	if (go->neg && \
dirkx	0:355018f44c9f	791	len >= CILEN_CHAP && \
dirkx	0:355018f44c9f	792	p[1] == CILEN_CHAP && \
dirkx	0:355018f44c9f	793	p[0] == opt) { \
dirkx	0:355018f44c9f	794	len -= CILEN_CHAP; \
dirkx	0:355018f44c9f	795	INCPTR(2, p); \
dirkx	0:355018f44c9f	796	GETSHORT(cishort, p); \
dirkx	0:355018f44c9f	797	GETCHAR(cichar, p); \
dirkx	0:355018f44c9f	798	no.neg = 1; \
dirkx	0:355018f44c9f	799	code \
dirkx	0:355018f44c9f	800	}
dirkx	0:355018f44c9f	801	#define NAKCICHAR(opt, neg, code) \
dirkx	0:355018f44c9f	802	if (go->neg && \
dirkx	0:355018f44c9f	803	len >= CILEN_CHAR && \
dirkx	0:355018f44c9f	804	p[1] == CILEN_CHAR && \
dirkx	0:355018f44c9f	805	p[0] == opt) { \
dirkx	0:355018f44c9f	806	len -= CILEN_CHAR; \
dirkx	0:355018f44c9f	807	INCPTR(2, p); \
dirkx	0:355018f44c9f	808	GETCHAR(cichar, p); \
dirkx	0:355018f44c9f	809	no.neg = 1; \
dirkx	0:355018f44c9f	810	code \
dirkx	0:355018f44c9f	811	}
dirkx	0:355018f44c9f	812	#define NAKCISHORT(opt, neg, code) \
dirkx	0:355018f44c9f	813	if (go->neg && \
dirkx	0:355018f44c9f	814	len >= CILEN_SHORT && \
dirkx	0:355018f44c9f	815	p[1] == CILEN_SHORT && \
dirkx	0:355018f44c9f	816	p[0] == opt) { \
dirkx	0:355018f44c9f	817	len -= CILEN_SHORT; \
dirkx	0:355018f44c9f	818	INCPTR(2, p); \
dirkx	0:355018f44c9f	819	GETSHORT(cishort, p); \
dirkx	0:355018f44c9f	820	no.neg = 1; \
dirkx	0:355018f44c9f	821	code \
dirkx	0:355018f44c9f	822	}
dirkx	0:355018f44c9f	823	#define NAKCILONG(opt, neg, code) \
dirkx	0:355018f44c9f	824	if (go->neg && \
dirkx	0:355018f44c9f	825	len >= CILEN_LONG && \
dirkx	0:355018f44c9f	826	p[1] == CILEN_LONG && \
dirkx	0:355018f44c9f	827	p[0] == opt) { \
dirkx	0:355018f44c9f	828	len -= CILEN_LONG; \
dirkx	0:355018f44c9f	829	INCPTR(2, p); \
dirkx	0:355018f44c9f	830	GETLONG(cilong, p); \
dirkx	0:355018f44c9f	831	no.neg = 1; \
dirkx	0:355018f44c9f	832	code \
dirkx	0:355018f44c9f	833	}
dirkx	0:355018f44c9f	834	#define NAKCILQR(opt, neg, code) \
dirkx	0:355018f44c9f	835	if (go->neg && \
dirkx	0:355018f44c9f	836	len >= CILEN_LQR && \
dirkx	0:355018f44c9f	837	p[1] == CILEN_LQR && \
dirkx	0:355018f44c9f	838	p[0] == opt) { \
dirkx	0:355018f44c9f	839	len -= CILEN_LQR; \
dirkx	0:355018f44c9f	840	INCPTR(2, p); \
dirkx	0:355018f44c9f	841	GETSHORT(cishort, p); \
dirkx	0:355018f44c9f	842	GETLONG(cilong, p); \
dirkx	0:355018f44c9f	843	no.neg = 1; \
dirkx	0:355018f44c9f	844	code \
dirkx	0:355018f44c9f	845	}
dirkx	0:355018f44c9f	846
dirkx	0:355018f44c9f	847	/*
dirkx	0:355018f44c9f	848	* We don't care if they want to send us smaller packets than
dirkx	0:355018f44c9f	849	* we want. Therefore, accept any MRU less than what we asked for,
dirkx	0:355018f44c9f	850	* but then ignore the new value when setting the MRU in the kernel.
dirkx	0:355018f44c9f	851	* If they send us a bigger MRU than what we asked, accept it, up to
dirkx	0:355018f44c9f	852	* the limit of the default MRU we'd get if we didn't negotiate.
dirkx	0:355018f44c9f	853	*/
dirkx	0:355018f44c9f	854	if (go->neg_mru && go->mru != PPP_DEFMRU) {
dirkx	0:355018f44c9f	855	NAKCISHORT(CI_MRU, neg_mru,
dirkx	0:355018f44c9f	856	if (cishort <= wo->mru \|\| cishort < PPP_DEFMRU) {
dirkx	0:355018f44c9f	857	try.mru = cishort;
dirkx	0:355018f44c9f	858	}
dirkx	0:355018f44c9f	859	);
dirkx	0:355018f44c9f	860	}
dirkx	0:355018f44c9f	861
dirkx	0:355018f44c9f	862	/*
dirkx	0:355018f44c9f	863	* Add any characters they want to our (receive-side) asyncmap.
dirkx	0:355018f44c9f	864	*/
dirkx	0:355018f44c9f	865	if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) {
dirkx	0:355018f44c9f	866	NAKCILONG(CI_ASYNCMAP, neg_asyncmap,
dirkx	0:355018f44c9f	867	try.asyncmap = go->asyncmap \| cilong;
dirkx	0:355018f44c9f	868	);
dirkx	0:355018f44c9f	869	}
dirkx	0:355018f44c9f	870
dirkx	0:355018f44c9f	871	/*
dirkx	0:355018f44c9f	872	* If they've nak'd our authentication-protocol, check whether
dirkx	0:355018f44c9f	873	* they are proposing a different protocol, or a different
dirkx	0:355018f44c9f	874	* hash algorithm for CHAP.
dirkx	0:355018f44c9f	875	*/
dirkx	0:355018f44c9f	876	if ((go->neg_chap \|\| go->neg_upap)
dirkx	0:355018f44c9f	877	&& len >= CILEN_SHORT
dirkx	0:355018f44c9f	878	&& p[0] == CI_AUTHTYPE && p[1] >= CILEN_SHORT && p[1] <= len) {
dirkx	0:355018f44c9f	879	cilen = p[1];
dirkx	0:355018f44c9f	880	len -= cilen;
dirkx	0:355018f44c9f	881	no.neg_chap = go->neg_chap;
dirkx	0:355018f44c9f	882	no.neg_upap = go->neg_upap;
dirkx	0:355018f44c9f	883	INCPTR(2, p);
dirkx	0:355018f44c9f	884	GETSHORT(cishort, p);
dirkx	0:355018f44c9f	885	if (cishort == PPP_PAP && cilen == CILEN_SHORT) {
dirkx	0:355018f44c9f	886	/*
dirkx	0:355018f44c9f	887	* If we were asking for CHAP, they obviously don't want to do it.
dirkx	0:355018f44c9f	888	* If we weren't asking for CHAP, then we were asking for PAP,
dirkx	0:355018f44c9f	889	* in which case this Nak is bad.
dirkx	0:355018f44c9f	890	*/
dirkx	0:355018f44c9f	891	if (!go->neg_chap) {
dirkx	0:355018f44c9f	892	goto bad;
dirkx	0:355018f44c9f	893	}
dirkx	0:355018f44c9f	894	try.neg_chap = 0;
dirkx	0:355018f44c9f	895
dirkx	0:355018f44c9f	896	} else if (cishort == PPP_CHAP && cilen == CILEN_CHAP) {
dirkx	0:355018f44c9f	897	GETCHAR(cichar, p);
dirkx	0:355018f44c9f	898	if (go->neg_chap) {
dirkx	0:355018f44c9f	899	/*
dirkx	0:355018f44c9f	900	* We were asking for CHAP/MD5; they must want a different
dirkx	0:355018f44c9f	901	* algorithm. If they can't do MD5, we'll have to stop
dirkx	0:355018f44c9f	902	* asking for CHAP.
dirkx	0:355018f44c9f	903	*/
dirkx	0:355018f44c9f	904	if (cichar != go->chap_mdtype) {
dirkx	0:355018f44c9f	905	try.neg_chap = 0;
dirkx	0:355018f44c9f	906	}
dirkx	0:355018f44c9f	907	} else {
dirkx	0:355018f44c9f	908	/*
dirkx	0:355018f44c9f	909	* Stop asking for PAP if we were asking for it.
dirkx	0:355018f44c9f	910	*/
dirkx	0:355018f44c9f	911	try.neg_upap = 0;
dirkx	0:355018f44c9f	912	}
dirkx	0:355018f44c9f	913
dirkx	0:355018f44c9f	914	} else {
dirkx	0:355018f44c9f	915	/*
dirkx	0:355018f44c9f	916	* We don't recognize what they're suggesting.
dirkx	0:355018f44c9f	917	* Stop asking for what we were asking for.
dirkx	0:355018f44c9f	918	*/
dirkx	0:355018f44c9f	919	if (go->neg_chap) {
dirkx	0:355018f44c9f	920	try.neg_chap = 0;
dirkx	0:355018f44c9f	921	} else {
dirkx	0:355018f44c9f	922	try.neg_upap = 0;
dirkx	0:355018f44c9f	923	}
dirkx	0:355018f44c9f	924	p += cilen - CILEN_SHORT;
dirkx	0:355018f44c9f	925	}
dirkx	0:355018f44c9f	926	}
dirkx	0:355018f44c9f	927
dirkx	0:355018f44c9f	928	/*
dirkx	0:355018f44c9f	929	* If they can't cope with our link quality protocol, we'll have
dirkx	0:355018f44c9f	930	* to stop asking for LQR. We haven't got any other protocol.
dirkx	0:355018f44c9f	931	* If they Nak the reporting period, take their value XXX ?
dirkx	0:355018f44c9f	932	*/
dirkx	0:355018f44c9f	933	NAKCILQR(CI_QUALITY, neg_lqr,
dirkx	0:355018f44c9f	934	if (cishort != PPP_LQR) {
dirkx	0:355018f44c9f	935	try.neg_lqr = 0;
dirkx	0:355018f44c9f	936	} else {
dirkx	0:355018f44c9f	937	try.lqr_period = cilong;
dirkx	0:355018f44c9f	938	}
dirkx	0:355018f44c9f	939	);
dirkx	0:355018f44c9f	940
dirkx	0:355018f44c9f	941	/*
dirkx	0:355018f44c9f	942	* Only implementing CBCP...not the rest of the callback options
dirkx	0:355018f44c9f	943	*/
dirkx	0:355018f44c9f	944	NAKCICHAR(CI_CALLBACK, neg_cbcp,
dirkx	0:355018f44c9f	945	try.neg_cbcp = 0;
dirkx	0:355018f44c9f	946	);
dirkx	0:355018f44c9f	947
dirkx	0:355018f44c9f	948	/*
dirkx	0:355018f44c9f	949	* Check for a looped-back line.
dirkx	0:355018f44c9f	950	*/
dirkx	0:355018f44c9f	951	NAKCILONG(CI_MAGICNUMBER, neg_magicnumber,
dirkx	0:355018f44c9f	952	try.magicnumber = magic();
dirkx	0:355018f44c9f	953	looped_back = 1;
dirkx	0:355018f44c9f	954	);
dirkx	0:355018f44c9f	955
dirkx	0:355018f44c9f	956	/*
dirkx	0:355018f44c9f	957	* Peer shouldn't send Nak for protocol compression or
dirkx	0:355018f44c9f	958	* address/control compression requests; they should send
dirkx	0:355018f44c9f	959	* a Reject instead. If they send a Nak, treat it as a Reject.
dirkx	0:355018f44c9f	960	*/
dirkx	0:355018f44c9f	961	NAKCIVOID(CI_PCOMPRESSION, neg_pcompression,
dirkx	0:355018f44c9f	962	try.neg_pcompression = 0;
dirkx	0:355018f44c9f	963	);
dirkx	0:355018f44c9f	964	NAKCIVOID(CI_ACCOMPRESSION, neg_accompression,
dirkx	0:355018f44c9f	965	try.neg_accompression = 0;
dirkx	0:355018f44c9f	966	);
dirkx	0:355018f44c9f	967
dirkx	0:355018f44c9f	968	/*
dirkx	0:355018f44c9f	969	* There may be remaining CIs, if the peer is requesting negotiation
dirkx	0:355018f44c9f	970	* on an option that we didn't include in our request packet.
dirkx	0:355018f44c9f	971	* If we see an option that we requested, or one we've already seen
dirkx	0:355018f44c9f	972	* in this packet, then this packet is bad.
dirkx	0:355018f44c9f	973	* If we wanted to respond by starting to negotiate on the requested
dirkx	0:355018f44c9f	974	* option(s), we could, but we don't, because except for the
dirkx	0:355018f44c9f	975	* authentication type and quality protocol, if we are not negotiating
dirkx	0:355018f44c9f	976	* an option, it is because we were told not to.
dirkx	0:355018f44c9f	977	* For the authentication type, the Nak from the peer means
dirkx	0:355018f44c9f	978	* `let me authenticate myself with you' which is a bit pointless.
dirkx	0:355018f44c9f	979	* For the quality protocol, the Nak means `ask me to send you quality
dirkx	0:355018f44c9f	980	* reports', but if we didn't ask for them, we don't want them.
dirkx	0:355018f44c9f	981	* An option we don't recognize represents the peer asking to
dirkx	0:355018f44c9f	982	* negotiate some option we don't support, so ignore it.
dirkx	0:355018f44c9f	983	*/
dirkx	0:355018f44c9f	984	while (len > CILEN_VOID) {
dirkx	0:355018f44c9f	985	GETCHAR(citype, p);
dirkx	0:355018f44c9f	986	GETCHAR(cilen, p);
dirkx	0:355018f44c9f	987	if (cilen < CILEN_VOID \|\| (len -= cilen) < 0) {
dirkx	0:355018f44c9f	988	goto bad;
dirkx	0:355018f44c9f	989	}
dirkx	0:355018f44c9f	990	next = p + cilen - 2;
dirkx	0:355018f44c9f	991
dirkx	0:355018f44c9f	992	switch (citype) {
dirkx	0:355018f44c9f	993	case CI_MRU:
dirkx	0:355018f44c9f	994	if ((go->neg_mru && go->mru != PPP_DEFMRU)
dirkx	0:355018f44c9f	995	\|\| no.neg_mru \|\| cilen != CILEN_SHORT) {
dirkx	0:355018f44c9f	996	goto bad;
dirkx	0:355018f44c9f	997	}
dirkx	0:355018f44c9f	998	GETSHORT(cishort, p);
dirkx	0:355018f44c9f	999	if (cishort < PPP_DEFMRU) {
dirkx	0:355018f44c9f	1000	try.mru = cishort;
dirkx	0:355018f44c9f	1001	}
dirkx	0:355018f44c9f	1002	break;
dirkx	0:355018f44c9f	1003	case CI_ASYNCMAP:
dirkx	0:355018f44c9f	1004	if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl)
dirkx	0:355018f44c9f	1005	\|\| no.neg_asyncmap \|\| cilen != CILEN_LONG) {
dirkx	0:355018f44c9f	1006	goto bad;
dirkx	0:355018f44c9f	1007	}
dirkx	0:355018f44c9f	1008	break;
dirkx	0:355018f44c9f	1009	case CI_AUTHTYPE:
dirkx	0:355018f44c9f	1010	if (go->neg_chap \|\| no.neg_chap \|\| go->neg_upap \|\| no.neg_upap) {
dirkx	0:355018f44c9f	1011	goto bad;
dirkx	0:355018f44c9f	1012	}
dirkx	0:355018f44c9f	1013	break;
dirkx	0:355018f44c9f	1014	case CI_MAGICNUMBER:
dirkx	0:355018f44c9f	1015	if (go->neg_magicnumber \|\| no.neg_magicnumber \|\|
dirkx	0:355018f44c9f	1016	cilen != CILEN_LONG) {
dirkx	0:355018f44c9f	1017	goto bad;
dirkx	0:355018f44c9f	1018	}
dirkx	0:355018f44c9f	1019	break;
dirkx	0:355018f44c9f	1020	case CI_PCOMPRESSION:
dirkx	0:355018f44c9f	1021	if (go->neg_pcompression \|\| no.neg_pcompression
dirkx	0:355018f44c9f	1022	\|\| cilen != CILEN_VOID) {
dirkx	0:355018f44c9f	1023	goto bad;
dirkx	0:355018f44c9f	1024	}
dirkx	0:355018f44c9f	1025	break;
dirkx	0:355018f44c9f	1026	case CI_ACCOMPRESSION:
dirkx	0:355018f44c9f	1027	if (go->neg_accompression \|\| no.neg_accompression
dirkx	0:355018f44c9f	1028	\|\| cilen != CILEN_VOID) {
dirkx	0:355018f44c9f	1029	goto bad;
dirkx	0:355018f44c9f	1030	}
dirkx	0:355018f44c9f	1031	break;
dirkx	0:355018f44c9f	1032	case CI_QUALITY:
dirkx	0:355018f44c9f	1033	if (go->neg_lqr \|\| no.neg_lqr \|\| cilen != CILEN_LQR) {
dirkx	0:355018f44c9f	1034	goto bad;
dirkx	0:355018f44c9f	1035	}
dirkx	0:355018f44c9f	1036	break;
dirkx	0:355018f44c9f	1037	}
dirkx	0:355018f44c9f	1038	p = next;
dirkx	0:355018f44c9f	1039	}
dirkx	0:355018f44c9f	1040
dirkx	0:355018f44c9f	1041	/* If there is still anything left, this packet is bad. */
dirkx	0:355018f44c9f	1042	if (len != 0) {
dirkx	0:355018f44c9f	1043	goto bad;
dirkx	0:355018f44c9f	1044	}
dirkx	0:355018f44c9f	1045
dirkx	0:355018f44c9f	1046	/*
dirkx	0:355018f44c9f	1047	* OK, the Nak is good. Now we can update state.
dirkx	0:355018f44c9f	1048	*/
dirkx	0:355018f44c9f	1049	if (f->state != LS_OPENED) {
dirkx	0:355018f44c9f	1050	if (looped_back) {
dirkx	0:355018f44c9f	1051	if (++try.numloops >= lcp_loopbackfail) {
dirkx	0:355018f44c9f	1052	LCPDEBUG(LOG_NOTICE, ("Serial line is looped back.\n"));
dirkx	0:355018f44c9f	1053	lcp_close(f->unit, "Loopback detected");
dirkx	0:355018f44c9f	1054	}
dirkx	0:355018f44c9f	1055	} else {
dirkx	0:355018f44c9f	1056	try.numloops = 0;
dirkx	0:355018f44c9f	1057	}
dirkx	0:355018f44c9f	1058	*go = try;
dirkx	0:355018f44c9f	1059	}
dirkx	0:355018f44c9f	1060
dirkx	0:355018f44c9f	1061	return 1;
dirkx	0:355018f44c9f	1062
dirkx	0:355018f44c9f	1063	bad:
dirkx	0:355018f44c9f	1064	LCPDEBUG(LOG_WARNING, ("lcp_nakci: received bad Nak!\n"));
dirkx	0:355018f44c9f	1065	return 0;
dirkx	0:355018f44c9f	1066	}
dirkx	0:355018f44c9f	1067
dirkx	0:355018f44c9f	1068
dirkx	0:355018f44c9f	1069	/*
dirkx	0:355018f44c9f	1070	* lcp_rejci - Peer has Rejected some of our CIs.
dirkx	0:355018f44c9f	1071	* This should not modify any state if the Reject is bad
dirkx	0:355018f44c9f	1072	* or if LCP is in the LS_OPENED state.
dirkx	0:355018f44c9f	1073	*
dirkx	0:355018f44c9f	1074	* Returns:
dirkx	0:355018f44c9f	1075	* 0 - Reject was bad.
dirkx	0:355018f44c9f	1076	* 1 - Reject was good.
dirkx	0:355018f44c9f	1077	*/
dirkx	0:355018f44c9f	1078	static int
dirkx	0:355018f44c9f	1079	lcp_rejci(fsm f, u_char p, int len)
dirkx	0:355018f44c9f	1080	{
dirkx	0:355018f44c9f	1081	lcp_options *go = &lcp_gotoptions[f->unit];
dirkx	0:355018f44c9f	1082	u_char cichar;
dirkx	0:355018f44c9f	1083	u_short cishort;
dirkx	0:355018f44c9f	1084	u32_t cilong;
dirkx	0:355018f44c9f	1085	lcp_options try; /* options to request next time */
dirkx	0:355018f44c9f	1086
dirkx	0:355018f44c9f	1087	try = *go;
dirkx	0:355018f44c9f	1088
dirkx	0:355018f44c9f	1089	/*
dirkx	0:355018f44c9f	1090	* Any Rejected CIs must be in exactly the same order that we sent.
dirkx	0:355018f44c9f	1091	* Check packet length and CI length at each step.
dirkx	0:355018f44c9f	1092	* If we find any deviations, then this packet is bad.
dirkx	0:355018f44c9f	1093	*/
dirkx	0:355018f44c9f	1094	#define REJCIVOID(opt, neg) \
dirkx	0:355018f44c9f	1095	if (go->neg && \
dirkx	0:355018f44c9f	1096	len >= CILEN_VOID && \
dirkx	0:355018f44c9f	1097	p[1] == CILEN_VOID && \
dirkx	0:355018f44c9f	1098	p[0] == opt) { \
dirkx	0:355018f44c9f	1099	len -= CILEN_VOID; \
dirkx	0:355018f44c9f	1100	INCPTR(CILEN_VOID, p); \
dirkx	0:355018f44c9f	1101	try.neg = 0; \
dirkx	0:355018f44c9f	1102	LCPDEBUG(LOG_INFO, ("lcp_rejci: void opt %d rejected\n", opt)); \
dirkx	0:355018f44c9f	1103	}
dirkx	0:355018f44c9f	1104	#define REJCISHORT(opt, neg, val) \
dirkx	0:355018f44c9f	1105	if (go->neg && \
dirkx	0:355018f44c9f	1106	len >= CILEN_SHORT && \
dirkx	0:355018f44c9f	1107	p[1] == CILEN_SHORT && \
dirkx	0:355018f44c9f	1108	p[0] == opt) { \
dirkx	0:355018f44c9f	1109	len -= CILEN_SHORT; \
dirkx	0:355018f44c9f	1110	INCPTR(2, p); \
dirkx	0:355018f44c9f	1111	GETSHORT(cishort, p); \
dirkx	0:355018f44c9f	1112	/* Check rejected value. */ \
dirkx	0:355018f44c9f	1113	if (cishort != val) { \
dirkx	0:355018f44c9f	1114	goto bad; \
dirkx	0:355018f44c9f	1115	} \
dirkx	0:355018f44c9f	1116	try.neg = 0; \
dirkx	0:355018f44c9f	1117	LCPDEBUG(LOG_INFO, ("lcp_rejci: short opt %d rejected\n", opt)); \
dirkx	0:355018f44c9f	1118	}
dirkx	0:355018f44c9f	1119	#define REJCICHAP(opt, neg, val, digest) \
dirkx	0:355018f44c9f	1120	if (go->neg && \
dirkx	0:355018f44c9f	1121	len >= CILEN_CHAP && \
dirkx	0:355018f44c9f	1122	p[1] == CILEN_CHAP && \
dirkx	0:355018f44c9f	1123	p[0] == opt) { \
dirkx	0:355018f44c9f	1124	len -= CILEN_CHAP; \
dirkx	0:355018f44c9f	1125	INCPTR(2, p); \
dirkx	0:355018f44c9f	1126	GETSHORT(cishort, p); \
dirkx	0:355018f44c9f	1127	GETCHAR(cichar, p); \
dirkx	0:355018f44c9f	1128	/* Check rejected value. */ \
dirkx	0:355018f44c9f	1129	if (cishort != val \|\| cichar != digest) { \
dirkx	0:355018f44c9f	1130	goto bad; \
dirkx	0:355018f44c9f	1131	} \
dirkx	0:355018f44c9f	1132	try.neg = 0; \
dirkx	0:355018f44c9f	1133	try.neg_upap = 0; \
dirkx	0:355018f44c9f	1134	LCPDEBUG(LOG_INFO, ("lcp_rejci: chap opt %d rejected\n", opt)); \
dirkx	0:355018f44c9f	1135	}
dirkx	0:355018f44c9f	1136	#define REJCILONG(opt, neg, val) \
dirkx	0:355018f44c9f	1137	if (go->neg && \
dirkx	0:355018f44c9f	1138	len >= CILEN_LONG && \
dirkx	0:355018f44c9f	1139	p[1] == CILEN_LONG && \
dirkx	0:355018f44c9f	1140	p[0] == opt) { \
dirkx	0:355018f44c9f	1141	len -= CILEN_LONG; \
dirkx	0:355018f44c9f	1142	INCPTR(2, p); \
dirkx	0:355018f44c9f	1143	GETLONG(cilong, p); \
dirkx	0:355018f44c9f	1144	/* Check rejected value. */ \
dirkx	0:355018f44c9f	1145	if (cilong != val) { \
dirkx	0:355018f44c9f	1146	goto bad; \
dirkx	0:355018f44c9f	1147	} \
dirkx	0:355018f44c9f	1148	try.neg = 0; \
dirkx	0:355018f44c9f	1149	LCPDEBUG(LOG_INFO, ("lcp_rejci: long opt %d rejected\n", opt)); \
dirkx	0:355018f44c9f	1150	}
dirkx	0:355018f44c9f	1151	#define REJCILQR(opt, neg, val) \
dirkx	0:355018f44c9f	1152	if (go->neg && \
dirkx	0:355018f44c9f	1153	len >= CILEN_LQR && \
dirkx	0:355018f44c9f	1154	p[1] == CILEN_LQR && \
dirkx	0:355018f44c9f	1155	p[0] == opt) { \
dirkx	0:355018f44c9f	1156	len -= CILEN_LQR; \
dirkx	0:355018f44c9f	1157	INCPTR(2, p); \
dirkx	0:355018f44c9f	1158	GETSHORT(cishort, p); \
dirkx	0:355018f44c9f	1159	GETLONG(cilong, p); \
dirkx	0:355018f44c9f	1160	/* Check rejected value. */ \
dirkx	0:355018f44c9f	1161	if (cishort != PPP_LQR \|\| cilong != val) { \
dirkx	0:355018f44c9f	1162	goto bad; \
dirkx	0:355018f44c9f	1163	} \
dirkx	0:355018f44c9f	1164	try.neg = 0; \
dirkx	0:355018f44c9f	1165	LCPDEBUG(LOG_INFO, ("lcp_rejci: LQR opt %d rejected\n", opt)); \
dirkx	0:355018f44c9f	1166	}
dirkx	0:355018f44c9f	1167	#define REJCICBCP(opt, neg, val) \
dirkx	0:355018f44c9f	1168	if (go->neg && \
dirkx	0:355018f44c9f	1169	len >= CILEN_CBCP && \
dirkx	0:355018f44c9f	1170	p[1] == CILEN_CBCP && \
dirkx	0:355018f44c9f	1171	p[0] == opt) { \
dirkx	0:355018f44c9f	1172	len -= CILEN_CBCP; \
dirkx	0:355018f44c9f	1173	INCPTR(2, p); \
dirkx	0:355018f44c9f	1174	GETCHAR(cichar, p); \
dirkx	0:355018f44c9f	1175	/* Check rejected value. */ \
dirkx	0:355018f44c9f	1176	if (cichar != val) { \
dirkx	0:355018f44c9f	1177	goto bad; \
dirkx	0:355018f44c9f	1178	} \
dirkx	0:355018f44c9f	1179	try.neg = 0; \
dirkx	0:355018f44c9f	1180	LCPDEBUG(LOG_INFO, ("lcp_rejci: Callback opt %d rejected\n", opt)); \
dirkx	0:355018f44c9f	1181	}
dirkx	0:355018f44c9f	1182
dirkx	0:355018f44c9f	1183	REJCISHORT(CI_MRU, neg_mru, go->mru);
dirkx	0:355018f44c9f	1184	REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap);
dirkx	0:355018f44c9f	1185	REJCICHAP(CI_AUTHTYPE, neg_chap, PPP_CHAP, go->chap_mdtype);
dirkx	0:355018f44c9f	1186	if (!go->neg_chap) {
dirkx	0:355018f44c9f	1187	REJCISHORT(CI_AUTHTYPE, neg_upap, PPP_PAP);
dirkx	0:355018f44c9f	1188	}
dirkx	0:355018f44c9f	1189	REJCILQR(CI_QUALITY, neg_lqr, go->lqr_period);
dirkx	0:355018f44c9f	1190	REJCICBCP(CI_CALLBACK, neg_cbcp, CBCP_OPT);
dirkx	0:355018f44c9f	1191	REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber);
dirkx	0:355018f44c9f	1192	REJCIVOID(CI_PCOMPRESSION, neg_pcompression);
dirkx	0:355018f44c9f	1193	REJCIVOID(CI_ACCOMPRESSION, neg_accompression);
dirkx	0:355018f44c9f	1194
dirkx	0:355018f44c9f	1195	/*
dirkx	0:355018f44c9f	1196	* If there are any remaining CIs, then this packet is bad.
dirkx	0:355018f44c9f	1197	*/
dirkx	0:355018f44c9f	1198	if (len != 0) {
dirkx	0:355018f44c9f	1199	goto bad;
dirkx	0:355018f44c9f	1200	}
dirkx	0:355018f44c9f	1201	/*
dirkx	0:355018f44c9f	1202	* Now we can update state.
dirkx	0:355018f44c9f	1203	*/
dirkx	0:355018f44c9f	1204	if (f->state != LS_OPENED) {
dirkx	0:355018f44c9f	1205	*go = try;
dirkx	0:355018f44c9f	1206	}
dirkx	0:355018f44c9f	1207	return 1;
dirkx	0:355018f44c9f	1208
dirkx	0:355018f44c9f	1209	bad:
dirkx	0:355018f44c9f	1210	LCPDEBUG(LOG_WARNING, ("lcp_rejci: received bad Reject!\n"));
dirkx	0:355018f44c9f	1211	return 0;
dirkx	0:355018f44c9f	1212	}
dirkx	0:355018f44c9f	1213
dirkx	0:355018f44c9f	1214
dirkx	0:355018f44c9f	1215	/*
dirkx	0:355018f44c9f	1216	* lcp_reqci - Check the peer's requested CIs and send appropriate response.
dirkx	0:355018f44c9f	1217	*
dirkx	0:355018f44c9f	1218	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
dirkx	0:355018f44c9f	1219	* appropriately. If reject_if_disagree is non-zero, doesn't return
dirkx	0:355018f44c9f	1220	* CONFNAK; returns CONFREJ if it can't return CONFACK.
dirkx	0:355018f44c9f	1221	*/
dirkx	0:355018f44c9f	1222	static int
dirkx	0:355018f44c9f	1223	lcp_reqci(fsm *f,
dirkx	0:355018f44c9f	1224	u_char inp, / Requested CIs */
dirkx	0:355018f44c9f	1225	int lenp, / Length of requested CIs */
dirkx	0:355018f44c9f	1226	int reject_if_disagree)
dirkx	0:355018f44c9f	1227	{
dirkx	0:355018f44c9f	1228	lcp_options *go = &lcp_gotoptions[f->unit];
dirkx	0:355018f44c9f	1229	lcp_options *ho = &lcp_hisoptions[f->unit];
dirkx	0:355018f44c9f	1230	lcp_options *ao = &lcp_allowoptions[f->unit];
dirkx	0:355018f44c9f	1231	u_char cip, next; /* Pointer to current and next CIs */
dirkx	0:355018f44c9f	1232	int cilen, citype; /* Parsed len, type */
dirkx	0:355018f44c9f	1233	u_char cichar; /* Parsed char value */
dirkx	0:355018f44c9f	1234	u_short cishort; /* Parsed short value */
dirkx	0:355018f44c9f	1235	u32_t cilong; /* Parse long value */
dirkx	0:355018f44c9f	1236	int rc = CONFACK; /* Final packet return code */
dirkx	0:355018f44c9f	1237	int orc; /* Individual option return code */
dirkx	0:355018f44c9f	1238	u_char p; / Pointer to next char to parse */
dirkx	0:355018f44c9f	1239	u_char rejp; / Pointer to next char in reject frame */
dirkx	0:355018f44c9f	1240	u_char nakp; / Pointer to next char in Nak frame */
dirkx	0:355018f44c9f	1241	int l = lenp; / Length left */
dirkx	0:355018f44c9f	1242	#if TRACELCP > 0
dirkx	0:355018f44c9f	1243	char traceBuf[80];
dirkx	0:355018f44c9f	1244	size_t traceNdx = 0;
dirkx	0:355018f44c9f	1245	#endif
dirkx	0:355018f44c9f	1246
dirkx	0:355018f44c9f	1247	/*
dirkx	0:355018f44c9f	1248	* Reset all his options.
dirkx	0:355018f44c9f	1249	*/
dirkx	0:355018f44c9f	1250	BZERO(ho, sizeof(*ho));
dirkx	0:355018f44c9f	1251
dirkx	0:355018f44c9f	1252	/*
dirkx	0:355018f44c9f	1253	* Process all his options.
dirkx	0:355018f44c9f	1254	*/
dirkx	0:355018f44c9f	1255	next = inp;
dirkx	0:355018f44c9f	1256	nakp = nak_buffer;
dirkx	0:355018f44c9f	1257	rejp = inp;
dirkx	0:355018f44c9f	1258	while (l) {
dirkx	0:355018f44c9f	1259	orc = CONFACK; /* Assume success */
dirkx	0:355018f44c9f	1260	cip = p = next; /* Remember begining of CI */
dirkx	0:355018f44c9f	1261	if (l < 2 \|\| /* Not enough data for CI header or */
dirkx	0:355018f44c9f	1262	p[1] < 2 \|\| /* CI length too small or */
dirkx	0:355018f44c9f	1263	p[1] > l) { /* CI length too big? */
dirkx	0:355018f44c9f	1264	LCPDEBUG(LOG_WARNING, ("lcp_reqci: bad CI length!\n"));
dirkx	0:355018f44c9f	1265	orc = CONFREJ; /* Reject bad CI */
dirkx	0:355018f44c9f	1266	cilen = l; /* Reject till end of packet */
dirkx	0:355018f44c9f	1267	l = 0; /* Don't loop again */
dirkx	0:355018f44c9f	1268	citype = 0;
dirkx	0:355018f44c9f	1269	goto endswitch;
dirkx	0:355018f44c9f	1270	}
dirkx	0:355018f44c9f	1271	GETCHAR(citype, p); /* Parse CI type */
dirkx	0:355018f44c9f	1272	GETCHAR(cilen, p); /* Parse CI length */
dirkx	0:355018f44c9f	1273	l -= cilen; /* Adjust remaining length */
dirkx	0:355018f44c9f	1274	next += cilen; /* Step to next CI */
dirkx	0:355018f44c9f	1275
dirkx	0:355018f44c9f	1276	switch (citype) { /* Check CI type */
dirkx	0:355018f44c9f	1277	case CI_MRU:
dirkx	0:355018f44c9f	1278	if (!ao->neg_mru) { /* Allow option? */
dirkx	0:355018f44c9f	1279	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - not allowed\n"));
dirkx	0:355018f44c9f	1280	orc = CONFREJ; /* Reject CI */
dirkx	0:355018f44c9f	1281	break;
dirkx	0:355018f44c9f	1282	} else if (cilen != CILEN_SHORT) { /* Check CI length */
dirkx	0:355018f44c9f	1283	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - bad length\n"));
dirkx	0:355018f44c9f	1284	orc = CONFREJ; /* Reject CI */
dirkx	0:355018f44c9f	1285	break;
dirkx	0:355018f44c9f	1286	}
dirkx	0:355018f44c9f	1287	GETSHORT(cishort, p); /* Parse MRU */
dirkx	0:355018f44c9f	1288
dirkx	0:355018f44c9f	1289	/*
dirkx	0:355018f44c9f	1290	* He must be able to receive at least our minimum.
dirkx	0:355018f44c9f	1291	* No need to check a maximum. If he sends a large number,
dirkx	0:355018f44c9f	1292	* we'll just ignore it.
dirkx	0:355018f44c9f	1293	*/
dirkx	0:355018f44c9f	1294	if (cishort < PPP_MINMRU) {
dirkx	0:355018f44c9f	1295	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak - MRU too small\n"));
dirkx	0:355018f44c9f	1296	orc = CONFNAK; /* Nak CI */
dirkx	0:355018f44c9f	1297	PUTCHAR(CI_MRU, nakp);
dirkx	0:355018f44c9f	1298	PUTCHAR(CILEN_SHORT, nakp);
dirkx	0:355018f44c9f	1299	PUTSHORT(PPP_MINMRU, nakp); /* Give him a hint */
dirkx	0:355018f44c9f	1300	break;
dirkx	0:355018f44c9f	1301	}
dirkx	0:355018f44c9f	1302	ho->neg_mru = 1; /* Remember he sent MRU */
dirkx	0:355018f44c9f	1303	ho->mru = cishort; /* And remember value */
dirkx	0:355018f44c9f	1304	#if TRACELCP > 0
dirkx	0:355018f44c9f	1305	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MRU %d", cishort);
dirkx	0:355018f44c9f	1306	traceNdx = strlen(traceBuf);
dirkx	0:355018f44c9f	1307	#endif
dirkx	0:355018f44c9f	1308	break;
dirkx	0:355018f44c9f	1309
dirkx	0:355018f44c9f	1310	case CI_ASYNCMAP:
dirkx	0:355018f44c9f	1311	if (!ao->neg_asyncmap) {
dirkx	0:355018f44c9f	1312	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP not allowed\n"));
dirkx	0:355018f44c9f	1313	orc = CONFREJ;
dirkx	0:355018f44c9f	1314	break;
dirkx	0:355018f44c9f	1315	} else if (cilen != CILEN_LONG) {
dirkx	0:355018f44c9f	1316	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP bad length\n"));
dirkx	0:355018f44c9f	1317	orc = CONFREJ;
dirkx	0:355018f44c9f	1318	break;
dirkx	0:355018f44c9f	1319	}
dirkx	0:355018f44c9f	1320	GETLONG(cilong, p);
dirkx	0:355018f44c9f	1321
dirkx	0:355018f44c9f	1322	/*
dirkx	0:355018f44c9f	1323	* Asyncmap must have set at least the bits
dirkx	0:355018f44c9f	1324	* which are set in lcp_allowoptions[unit].asyncmap.
dirkx	0:355018f44c9f	1325	*/
dirkx	0:355018f44c9f	1326	if ((ao->asyncmap & ~cilong) != 0) {
dirkx	0:355018f44c9f	1327	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak ASYNCMAP %lX missing %lX\n",
dirkx	0:355018f44c9f	1328	cilong, ao->asyncmap));
dirkx	0:355018f44c9f	1329	orc = CONFNAK;
dirkx	0:355018f44c9f	1330	PUTCHAR(CI_ASYNCMAP, nakp);
dirkx	0:355018f44c9f	1331	PUTCHAR(CILEN_LONG, nakp);
dirkx	0:355018f44c9f	1332	PUTLONG(ao->asyncmap \| cilong, nakp);
dirkx	0:355018f44c9f	1333	break;
dirkx	0:355018f44c9f	1334	}
dirkx	0:355018f44c9f	1335	ho->neg_asyncmap = 1;
dirkx	0:355018f44c9f	1336	ho->asyncmap = cilong;
dirkx	0:355018f44c9f	1337	#if TRACELCP > 0
dirkx	0:355018f44c9f	1338	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ASYNCMAP=%lX", cilong);
dirkx	0:355018f44c9f	1339	traceNdx = strlen(traceBuf);
dirkx	0:355018f44c9f	1340	#endif
dirkx	0:355018f44c9f	1341	break;
dirkx	0:355018f44c9f	1342
dirkx	0:355018f44c9f	1343	case CI_AUTHTYPE:
dirkx	0:355018f44c9f	1344	if (cilen < CILEN_SHORT) {
dirkx	0:355018f44c9f	1345	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE missing arg\n"));
dirkx	0:355018f44c9f	1346	orc = CONFREJ;
dirkx	0:355018f44c9f	1347	break;
dirkx	0:355018f44c9f	1348	} else if (!(ao->neg_upap \|\| ao->neg_chap)) {
dirkx	0:355018f44c9f	1349	/*
dirkx	0:355018f44c9f	1350	* Reject the option if we're not willing to authenticate.
dirkx	0:355018f44c9f	1351	*/
dirkx	0:355018f44c9f	1352	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE not allowed\n"));
dirkx	0:355018f44c9f	1353	orc = CONFREJ;
dirkx	0:355018f44c9f	1354	break;
dirkx	0:355018f44c9f	1355	}
dirkx	0:355018f44c9f	1356	GETSHORT(cishort, p);
dirkx	0:355018f44c9f	1357
dirkx	0:355018f44c9f	1358	/*
dirkx	0:355018f44c9f	1359	* Authtype must be UPAP or CHAP.
dirkx	0:355018f44c9f	1360	*
dirkx	0:355018f44c9f	1361	* Note: if both ao->neg_upap and ao->neg_chap are set,
dirkx	0:355018f44c9f	1362	* and the peer sends a Configure-Request with two
dirkx	0:355018f44c9f	1363	* authenticate-protocol requests, one for CHAP and one
dirkx	0:355018f44c9f	1364	* for UPAP, then we will reject the second request.
dirkx	0:355018f44c9f	1365	* Whether we end up doing CHAP or UPAP depends then on
dirkx	0:355018f44c9f	1366	* the ordering of the CIs in the peer's Configure-Request.
dirkx	0:355018f44c9f	1367	*/
dirkx	0:355018f44c9f	1368
dirkx	0:355018f44c9f	1369	if (cishort == PPP_PAP) {
dirkx	0:355018f44c9f	1370	if (ho->neg_chap) { /* we've already accepted CHAP */
dirkx	0:355018f44c9f	1371	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP already accepted\n"));
dirkx	0:355018f44c9f	1372	orc = CONFREJ;
dirkx	0:355018f44c9f	1373	break;
dirkx	0:355018f44c9f	1374	} else if (cilen != CILEN_SHORT) {
dirkx	0:355018f44c9f	1375	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP bad len\n"));
dirkx	0:355018f44c9f	1376	orc = CONFREJ;
dirkx	0:355018f44c9f	1377	break;
dirkx	0:355018f44c9f	1378	}
dirkx	0:355018f44c9f	1379	if (!ao->neg_upap) { /* we don't want to do PAP */
dirkx	0:355018f44c9f	1380	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE PAP not allowed\n"));
dirkx	0:355018f44c9f	1381	orc = CONFNAK; /* NAK it and suggest CHAP */
dirkx	0:355018f44c9f	1382	PUTCHAR(CI_AUTHTYPE, nakp);
dirkx	0:355018f44c9f	1383	PUTCHAR(CILEN_CHAP, nakp);
dirkx	0:355018f44c9f	1384	PUTSHORT(PPP_CHAP, nakp);
dirkx	0:355018f44c9f	1385	PUTCHAR(ao->chap_mdtype, nakp);
dirkx	0:355018f44c9f	1386	break;
dirkx	0:355018f44c9f	1387	}
dirkx	0:355018f44c9f	1388	ho->neg_upap = 1;
dirkx	0:355018f44c9f	1389	#if TRACELCP > 0
dirkx	0:355018f44c9f	1390	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PAP (%X)", cishort);
dirkx	0:355018f44c9f	1391	traceNdx = strlen(traceBuf);
dirkx	0:355018f44c9f	1392	#endif
dirkx	0:355018f44c9f	1393	break;
dirkx	0:355018f44c9f	1394	}
dirkx	0:355018f44c9f	1395	if (cishort == PPP_CHAP) {
dirkx	0:355018f44c9f	1396	if (ho->neg_upap) { /* we've already accepted PAP */
dirkx	0:355018f44c9f	1397	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP accepted PAP\n"));
dirkx	0:355018f44c9f	1398	orc = CONFREJ;
dirkx	0:355018f44c9f	1399	break;
dirkx	0:355018f44c9f	1400	} else if (cilen != CILEN_CHAP) {
dirkx	0:355018f44c9f	1401	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP bad len\n"));
dirkx	0:355018f44c9f	1402	orc = CONFREJ;
dirkx	0:355018f44c9f	1403	break;
dirkx	0:355018f44c9f	1404	}
dirkx	0:355018f44c9f	1405	if (!ao->neg_chap) { /* we don't want to do CHAP */
dirkx	0:355018f44c9f	1406	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP not allowed\n"));
dirkx	0:355018f44c9f	1407	orc = CONFNAK; /* NAK it and suggest PAP */
dirkx	0:355018f44c9f	1408	PUTCHAR(CI_AUTHTYPE, nakp);
dirkx	0:355018f44c9f	1409	PUTCHAR(CILEN_SHORT, nakp);
dirkx	0:355018f44c9f	1410	PUTSHORT(PPP_PAP, nakp);
dirkx	0:355018f44c9f	1411	break;
dirkx	0:355018f44c9f	1412	}
dirkx	0:355018f44c9f	1413	GETCHAR(cichar, p); /* get digest type*/
dirkx	0:355018f44c9f	1414	if (cichar != CHAP_DIGEST_MD5
dirkx	0:355018f44c9f	1415	#if MSCHAP_SUPPORT
dirkx	0:355018f44c9f	1416	&& cichar != CHAP_MICROSOFT
dirkx	0:355018f44c9f	1417	#endif
dirkx	0:355018f44c9f	1418	) {
dirkx	0:355018f44c9f	1419	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP digest=%d\n", (int)cichar));
dirkx	0:355018f44c9f	1420	orc = CONFNAK;
dirkx	0:355018f44c9f	1421	PUTCHAR(CI_AUTHTYPE, nakp);
dirkx	0:355018f44c9f	1422	PUTCHAR(CILEN_CHAP, nakp);
dirkx	0:355018f44c9f	1423	PUTSHORT(PPP_CHAP, nakp);
dirkx	0:355018f44c9f	1424	PUTCHAR(ao->chap_mdtype, nakp);
dirkx	0:355018f44c9f	1425	break;
dirkx	0:355018f44c9f	1426	}
dirkx	0:355018f44c9f	1427	#if TRACELCP > 0
dirkx	0:355018f44c9f	1428	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CHAP %X,%d", cishort, (int)cichar);
dirkx	0:355018f44c9f	1429	traceNdx = strlen(traceBuf);
dirkx	0:355018f44c9f	1430	#endif
dirkx	0:355018f44c9f	1431	ho->chap_mdtype = cichar; /* save md type */
dirkx	0:355018f44c9f	1432	ho->neg_chap = 1;
dirkx	0:355018f44c9f	1433	break;
dirkx	0:355018f44c9f	1434	}
dirkx	0:355018f44c9f	1435
dirkx	0:355018f44c9f	1436	/*
dirkx	0:355018f44c9f	1437	* We don't recognize the protocol they're asking for.
dirkx	0:355018f44c9f	1438	* Nak it with something we're willing to do.
dirkx	0:355018f44c9f	1439	* (At this point we know ao->neg_upap \|\| ao->neg_chap.)
dirkx	0:355018f44c9f	1440	*/
dirkx	0:355018f44c9f	1441	orc = CONFNAK;
dirkx	0:355018f44c9f	1442	PUTCHAR(CI_AUTHTYPE, nakp);
dirkx	0:355018f44c9f	1443	if (ao->neg_chap) {
dirkx	0:355018f44c9f	1444	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req CHAP\n", cishort));
dirkx	0:355018f44c9f	1445	PUTCHAR(CILEN_CHAP, nakp);
dirkx	0:355018f44c9f	1446	PUTSHORT(PPP_CHAP, nakp);
dirkx	0:355018f44c9f	1447	PUTCHAR(ao->chap_mdtype, nakp);
dirkx	0:355018f44c9f	1448	} else {
dirkx	0:355018f44c9f	1449	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req PAP\n", cishort));
dirkx	0:355018f44c9f	1450	PUTCHAR(CILEN_SHORT, nakp);
dirkx	0:355018f44c9f	1451	PUTSHORT(PPP_PAP, nakp);
dirkx	0:355018f44c9f	1452	}
dirkx	0:355018f44c9f	1453	break;
dirkx	0:355018f44c9f	1454
dirkx	0:355018f44c9f	1455	case CI_QUALITY:
dirkx	0:355018f44c9f	1456	GETSHORT(cishort, p);
dirkx	0:355018f44c9f	1457	GETLONG(cilong, p);
dirkx	0:355018f44c9f	1458	#if TRACELCP > 0
dirkx	0:355018f44c9f	1459	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " QUALITY (%x %x)", cishort, (unsigned int) cilong);
dirkx	0:355018f44c9f	1460	traceNdx = strlen(traceBuf);
dirkx	0:355018f44c9f	1461	#endif
dirkx	0:355018f44c9f	1462
dirkx	0:355018f44c9f	1463	if (!ao->neg_lqr \|\|
dirkx	0:355018f44c9f	1464	cilen != CILEN_LQR) {
dirkx	0:355018f44c9f	1465	orc = CONFREJ;
dirkx	0:355018f44c9f	1466	break;
dirkx	0:355018f44c9f	1467	}
dirkx	0:355018f44c9f	1468
dirkx	0:355018f44c9f	1469	/*
dirkx	0:355018f44c9f	1470	* Check the protocol and the reporting period.
dirkx	0:355018f44c9f	1471	* XXX When should we Nak this, and what with?
dirkx	0:355018f44c9f	1472	*/
dirkx	0:355018f44c9f	1473	if (cishort != PPP_LQR) {
dirkx	0:355018f44c9f	1474	orc = CONFNAK;
dirkx	0:355018f44c9f	1475	PUTCHAR(CI_QUALITY, nakp);
dirkx	0:355018f44c9f	1476	PUTCHAR(CILEN_LQR, nakp);
dirkx	0:355018f44c9f	1477	PUTSHORT(PPP_LQR, nakp);
dirkx	0:355018f44c9f	1478	PUTLONG(ao->lqr_period, nakp);
dirkx	0:355018f44c9f	1479	break;
dirkx	0:355018f44c9f	1480	}
dirkx	0:355018f44c9f	1481	break;
dirkx	0:355018f44c9f	1482
dirkx	0:355018f44c9f	1483	case CI_MAGICNUMBER:
dirkx	0:355018f44c9f	1484	if (!(ao->neg_magicnumber \|\| go->neg_magicnumber) \|\|
dirkx	0:355018f44c9f	1485	cilen != CILEN_LONG) {
dirkx	0:355018f44c9f	1486	orc = CONFREJ;
dirkx	0:355018f44c9f	1487	break;
dirkx	0:355018f44c9f	1488	}
dirkx	0:355018f44c9f	1489	GETLONG(cilong, p);
dirkx	0:355018f44c9f	1490	#if TRACELCP > 0
dirkx	0:355018f44c9f	1491	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MAGICNUMBER (%lX)", cilong);
dirkx	0:355018f44c9f	1492	traceNdx = strlen(traceBuf);
dirkx	0:355018f44c9f	1493	#endif
dirkx	0:355018f44c9f	1494
dirkx	0:355018f44c9f	1495	/*
dirkx	0:355018f44c9f	1496	* He must have a different magic number.
dirkx	0:355018f44c9f	1497	*/
dirkx	0:355018f44c9f	1498	if (go->neg_magicnumber &&
dirkx	0:355018f44c9f	1499	cilong == go->magicnumber) {
dirkx	0:355018f44c9f	1500	cilong = magic(); /* Don't put magic() inside macro! */
dirkx	0:355018f44c9f	1501	orc = CONFNAK;
dirkx	0:355018f44c9f	1502	PUTCHAR(CI_MAGICNUMBER, nakp);
dirkx	0:355018f44c9f	1503	PUTCHAR(CILEN_LONG, nakp);
dirkx	0:355018f44c9f	1504	PUTLONG(cilong, nakp);
dirkx	0:355018f44c9f	1505	break;
dirkx	0:355018f44c9f	1506	}
dirkx	0:355018f44c9f	1507	ho->neg_magicnumber = 1;
dirkx	0:355018f44c9f	1508	ho->magicnumber = cilong;
dirkx	0:355018f44c9f	1509	break;
dirkx	0:355018f44c9f	1510
dirkx	0:355018f44c9f	1511
dirkx	0:355018f44c9f	1512	case CI_PCOMPRESSION:
dirkx	0:355018f44c9f	1513	#if TRACELCP > 0
dirkx	0:355018f44c9f	1514	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PCOMPRESSION");
dirkx	0:355018f44c9f	1515	traceNdx = strlen(traceBuf);
dirkx	0:355018f44c9f	1516	#endif
dirkx	0:355018f44c9f	1517	if (!ao->neg_pcompression \|\|
dirkx	0:355018f44c9f	1518	cilen != CILEN_VOID) {
dirkx	0:355018f44c9f	1519	orc = CONFREJ;
dirkx	0:355018f44c9f	1520	break;
dirkx	0:355018f44c9f	1521	}
dirkx	0:355018f44c9f	1522	ho->neg_pcompression = 1;
dirkx	0:355018f44c9f	1523	break;
dirkx	0:355018f44c9f	1524
dirkx	0:355018f44c9f	1525	case CI_ACCOMPRESSION:
dirkx	0:355018f44c9f	1526	#if TRACELCP > 0
dirkx	0:355018f44c9f	1527	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ACCOMPRESSION");
dirkx	0:355018f44c9f	1528	traceNdx = strlen(traceBuf);
dirkx	0:355018f44c9f	1529	#endif
dirkx	0:355018f44c9f	1530	if (!ao->neg_accompression \|\|
dirkx	0:355018f44c9f	1531	cilen != CILEN_VOID) {
dirkx	0:355018f44c9f	1532	orc = CONFREJ;
dirkx	0:355018f44c9f	1533	break;
dirkx	0:355018f44c9f	1534	}
dirkx	0:355018f44c9f	1535	ho->neg_accompression = 1;
dirkx	0:355018f44c9f	1536	break;
dirkx	0:355018f44c9f	1537
dirkx	0:355018f44c9f	1538	case CI_MRRU:
dirkx	0:355018f44c9f	1539	#if TRACELCP > 0
dirkx	0:355018f44c9f	1540	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_MRRU");
dirkx	0:355018f44c9f	1541	traceNdx = strlen(traceBuf);
dirkx	0:355018f44c9f	1542	#endif
dirkx	0:355018f44c9f	1543	orc = CONFREJ;
dirkx	0:355018f44c9f	1544	break;
dirkx	0:355018f44c9f	1545
dirkx	0:355018f44c9f	1546	case CI_SSNHF:
dirkx	0:355018f44c9f	1547	#if TRACELCP > 0
dirkx	0:355018f44c9f	1548	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_SSNHF");
dirkx	0:355018f44c9f	1549	traceNdx = strlen(traceBuf);
dirkx	0:355018f44c9f	1550	#endif
dirkx	0:355018f44c9f	1551	orc = CONFREJ;
dirkx	0:355018f44c9f	1552	break;
dirkx	0:355018f44c9f	1553
dirkx	0:355018f44c9f	1554	case CI_EPDISC:
dirkx	0:355018f44c9f	1555	#if TRACELCP > 0
dirkx	0:355018f44c9f	1556	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_EPDISC");
dirkx	0:355018f44c9f	1557	traceNdx = strlen(traceBuf);
dirkx	0:355018f44c9f	1558	#endif
dirkx	0:355018f44c9f	1559	orc = CONFREJ;
dirkx	0:355018f44c9f	1560	break;
dirkx	0:355018f44c9f	1561
dirkx	0:355018f44c9f	1562	default:
dirkx	0:355018f44c9f	1563	#if TRACELCP
dirkx	0:355018f44c9f	1564	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " unknown %d", citype);
dirkx	0:355018f44c9f	1565	traceNdx = strlen(traceBuf);
dirkx	0:355018f44c9f	1566	#endif
dirkx	0:355018f44c9f	1567	orc = CONFREJ;
dirkx	0:355018f44c9f	1568	break;
dirkx	0:355018f44c9f	1569	}
dirkx	0:355018f44c9f	1570
dirkx	0:355018f44c9f	1571	endswitch:
dirkx	0:355018f44c9f	1572	#if TRACELCP
dirkx	0:355018f44c9f	1573	if (traceNdx >= 80 - 32) {
dirkx	0:355018f44c9f	1574	LCPDEBUG(LOG_INFO, ("lcp_reqci: rcvd%s\n", traceBuf));
dirkx	0:355018f44c9f	1575	traceNdx = 0;
dirkx	0:355018f44c9f	1576	}
dirkx	0:355018f44c9f	1577	#endif
dirkx	0:355018f44c9f	1578	if (orc == CONFACK && /* Good CI */
dirkx	0:355018f44c9f	1579	rc != CONFACK) { /* but prior CI wasnt? */
dirkx	0:355018f44c9f	1580	continue; /* Don't send this one */
dirkx	0:355018f44c9f	1581	}
dirkx	0:355018f44c9f	1582
dirkx	0:355018f44c9f	1583	if (orc == CONFNAK) { /* Nak this CI? */
dirkx	0:355018f44c9f	1584	if (reject_if_disagree /* Getting fed up with sending NAKs? */
dirkx	0:355018f44c9f	1585	&& citype != CI_MAGICNUMBER) {
dirkx	0:355018f44c9f	1586	orc = CONFREJ; /* Get tough if so */
dirkx	0:355018f44c9f	1587	} else {
dirkx	0:355018f44c9f	1588	if (rc == CONFREJ) { /* Rejecting prior CI? */
dirkx	0:355018f44c9f	1589	continue; /* Don't send this one */
dirkx	0:355018f44c9f	1590	}
dirkx	0:355018f44c9f	1591	rc = CONFNAK;
dirkx	0:355018f44c9f	1592	}
dirkx	0:355018f44c9f	1593	}
dirkx	0:355018f44c9f	1594	if (orc == CONFREJ) { /* Reject this CI */
dirkx	0:355018f44c9f	1595	rc = CONFREJ;
dirkx	0:355018f44c9f	1596	if (cip != rejp) { /* Need to move rejected CI? */
dirkx	0:355018f44c9f	1597	BCOPY(cip, rejp, cilen); /* Move it */
dirkx	0:355018f44c9f	1598	}
dirkx	0:355018f44c9f	1599	INCPTR(cilen, rejp); /* Update output pointer */
dirkx	0:355018f44c9f	1600	}
dirkx	0:355018f44c9f	1601	}
dirkx	0:355018f44c9f	1602
dirkx	0:355018f44c9f	1603	/*
dirkx	0:355018f44c9f	1604	* If we wanted to send additional NAKs (for unsent CIs), the
dirkx	0:355018f44c9f	1605	* code would go here. The extra NAKs would go at *nakp.
dirkx	0:355018f44c9f	1606	* At present there are no cases where we want to ask the
dirkx	0:355018f44c9f	1607	* peer to negotiate an option.
dirkx	0:355018f44c9f	1608	*/
dirkx	0:355018f44c9f	1609
dirkx	0:355018f44c9f	1610	switch (rc) {
dirkx	0:355018f44c9f	1611	case CONFACK:
dirkx	0:355018f44c9f	1612	*lenp = (int)(next - inp);
dirkx	0:355018f44c9f	1613	break;
dirkx	0:355018f44c9f	1614	case CONFNAK:
dirkx	0:355018f44c9f	1615	/*
dirkx	0:355018f44c9f	1616	* Copy the Nak'd options from the nak_buffer to the caller's buffer.
dirkx	0:355018f44c9f	1617	*/
dirkx	0:355018f44c9f	1618	*lenp = (int)(nakp - nak_buffer);
dirkx	0:355018f44c9f	1619	BCOPY(nak_buffer, inp, *lenp);
dirkx	0:355018f44c9f	1620	break;
dirkx	0:355018f44c9f	1621	case CONFREJ:
dirkx	0:355018f44c9f	1622	*lenp = (int)(rejp - inp);
dirkx	0:355018f44c9f	1623	break;
dirkx	0:355018f44c9f	1624	}
dirkx	0:355018f44c9f	1625
dirkx	0:355018f44c9f	1626	#if TRACELCP > 0
dirkx	0:355018f44c9f	1627	if (traceNdx > 0) {
dirkx	0:355018f44c9f	1628	LCPDEBUG(LOG_INFO, ("lcp_reqci: %s\n", traceBuf));
dirkx	0:355018f44c9f	1629	}
dirkx	0:355018f44c9f	1630	#endif
dirkx	0:355018f44c9f	1631	LCPDEBUG(LOG_INFO, ("lcp_reqci: returning CONF%s.\n", CODENAME(rc)));
dirkx	0:355018f44c9f	1632	return (rc); /* Return final code */
dirkx	0:355018f44c9f	1633	}
dirkx	0:355018f44c9f	1634
dirkx	0:355018f44c9f	1635
dirkx	0:355018f44c9f	1636	/*
dirkx	0:355018f44c9f	1637	* lcp_up - LCP has come UP.
dirkx	0:355018f44c9f	1638	*/
dirkx	0:355018f44c9f	1639	static void
dirkx	0:355018f44c9f	1640	lcp_up(fsm *f)
dirkx	0:355018f44c9f	1641	{
dirkx	0:355018f44c9f	1642	lcp_options *wo = &lcp_wantoptions[f->unit];
dirkx	0:355018f44c9f	1643	lcp_options *ho = &lcp_hisoptions[f->unit];
dirkx	0:355018f44c9f	1644	lcp_options *go = &lcp_gotoptions[f->unit];
dirkx	0:355018f44c9f	1645	lcp_options *ao = &lcp_allowoptions[f->unit];
dirkx	0:355018f44c9f	1646
dirkx	0:355018f44c9f	1647	if (!go->neg_magicnumber) {
dirkx	0:355018f44c9f	1648	go->magicnumber = 0;
dirkx	0:355018f44c9f	1649	}
dirkx	0:355018f44c9f	1650	if (!ho->neg_magicnumber) {
dirkx	0:355018f44c9f	1651	ho->magicnumber = 0;
dirkx	0:355018f44c9f	1652	}
dirkx	0:355018f44c9f	1653
dirkx	0:355018f44c9f	1654	/*
dirkx	0:355018f44c9f	1655	* Set our MTU to the smaller of the MTU we wanted and
dirkx	0:355018f44c9f	1656	* the MRU our peer wanted. If we negotiated an MRU,
dirkx	0:355018f44c9f	1657	* set our MRU to the larger of value we wanted and
dirkx	0:355018f44c9f	1658	* the value we got in the negotiation.
dirkx	0:355018f44c9f	1659	*/
dirkx	0:355018f44c9f	1660	ppp_send_config(f->unit, LWIP_MIN(ao->mru, (ho->neg_mru? ho->mru: PPP_MRU)),
dirkx	0:355018f44c9f	1661	(ho->neg_asyncmap? ho->asyncmap: 0xffffffffl),
dirkx	0:355018f44c9f	1662	ho->neg_pcompression, ho->neg_accompression);
dirkx	0:355018f44c9f	1663	/*
dirkx	0:355018f44c9f	1664	* If the asyncmap hasn't been negotiated, we really should
dirkx	0:355018f44c9f	1665	* set the receive asyncmap to ffffffff, but we set it to 0
dirkx	0:355018f44c9f	1666	* for backwards contemptibility.
dirkx	0:355018f44c9f	1667	*/
dirkx	0:355018f44c9f	1668	ppp_recv_config(f->unit, (go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU),
dirkx	0:355018f44c9f	1669	(go->neg_asyncmap? go->asyncmap: 0x00000000),
dirkx	0:355018f44c9f	1670	go->neg_pcompression, go->neg_accompression);
dirkx	0:355018f44c9f	1671
dirkx	0:355018f44c9f	1672	if (ho->neg_mru) {
dirkx	0:355018f44c9f	1673	peer_mru[f->unit] = ho->mru;
dirkx	0:355018f44c9f	1674	}
dirkx	0:355018f44c9f	1675
dirkx	0:355018f44c9f	1676	lcp_echo_lowerup(f->unit); /* Enable echo messages */
dirkx	0:355018f44c9f	1677
dirkx	0:355018f44c9f	1678	link_established(f->unit); /* The link is up; authenticate now */
dirkx	0:355018f44c9f	1679	}
dirkx	0:355018f44c9f	1680
dirkx	0:355018f44c9f	1681
dirkx	0:355018f44c9f	1682	/*
dirkx	0:355018f44c9f	1683	* lcp_down - LCP has gone DOWN.
dirkx	0:355018f44c9f	1684	*
dirkx	0:355018f44c9f	1685	* Alert other protocols.
dirkx	0:355018f44c9f	1686	*/
dirkx	0:355018f44c9f	1687	static void
dirkx	0:355018f44c9f	1688	lcp_down(fsm *f)
dirkx	0:355018f44c9f	1689	{
dirkx	0:355018f44c9f	1690	lcp_options *go = &lcp_gotoptions[f->unit];
dirkx	0:355018f44c9f	1691
dirkx	0:355018f44c9f	1692	lcp_echo_lowerdown(f->unit);
dirkx	0:355018f44c9f	1693
dirkx	0:355018f44c9f	1694	link_down(f->unit);
dirkx	0:355018f44c9f	1695
dirkx	0:355018f44c9f	1696	ppp_send_config(f->unit, PPP_MRU, 0xffffffffl, 0, 0);
dirkx	0:355018f44c9f	1697	ppp_recv_config(f->unit, PPP_MRU,
dirkx	0:355018f44c9f	1698	(go->neg_asyncmap? go->asyncmap: 0x00000000),
dirkx	0:355018f44c9f	1699	go->neg_pcompression, go->neg_accompression);
dirkx	0:355018f44c9f	1700	peer_mru[f->unit] = PPP_MRU;
dirkx	0:355018f44c9f	1701	}
dirkx	0:355018f44c9f	1702
dirkx	0:355018f44c9f	1703
dirkx	0:355018f44c9f	1704	/*
dirkx	0:355018f44c9f	1705	* lcp_starting - LCP needs the lower layer up.
dirkx	0:355018f44c9f	1706	*/
dirkx	0:355018f44c9f	1707	static void
dirkx	0:355018f44c9f	1708	lcp_starting(fsm *f)
dirkx	0:355018f44c9f	1709	{
dirkx	0:355018f44c9f	1710	link_required(f->unit); /* lwip: currently does nothing */
dirkx	0:355018f44c9f	1711	}
dirkx	0:355018f44c9f	1712
dirkx	0:355018f44c9f	1713
dirkx	0:355018f44c9f	1714	/*
dirkx	0:355018f44c9f	1715	* lcp_finished - LCP has finished with the lower layer.
dirkx	0:355018f44c9f	1716	*/
dirkx	0:355018f44c9f	1717	static void
dirkx	0:355018f44c9f	1718	lcp_finished(fsm *f)
dirkx	0:355018f44c9f	1719	{
dirkx	0:355018f44c9f	1720	link_terminated(f->unit); /* we are finished with the link */
dirkx	0:355018f44c9f	1721	}
dirkx	0:355018f44c9f	1722
dirkx	0:355018f44c9f	1723
dirkx	0:355018f44c9f	1724	#if PPP_ADDITIONAL_CALLBACKS
dirkx	0:355018f44c9f	1725	/*
dirkx	0:355018f44c9f	1726	* print_string - print a readable representation of a string using
dirkx	0:355018f44c9f	1727	* printer.
dirkx	0:355018f44c9f	1728	*/
dirkx	0:355018f44c9f	1729	static void
dirkx	0:355018f44c9f	1730	print_string( char p, int len, void (printer) (void , char , ...), void *arg)
dirkx	0:355018f44c9f	1731	{
dirkx	0:355018f44c9f	1732	int c;
dirkx	0:355018f44c9f	1733
dirkx	0:355018f44c9f	1734	printer(arg, "\"");
dirkx	0:355018f44c9f	1735	for (; len > 0; --len) {
dirkx	0:355018f44c9f	1736	c = *p++;
dirkx	0:355018f44c9f	1737	if (' ' <= c && c <= '~') {
dirkx	0:355018f44c9f	1738	if (c == '\\' \|\| c == '"') {
dirkx	0:355018f44c9f	1739	printer(arg, "\\");
dirkx	0:355018f44c9f	1740	}
dirkx	0:355018f44c9f	1741	printer(arg, "%c", c);
dirkx	0:355018f44c9f	1742	} else {
dirkx	0:355018f44c9f	1743	switch (c) {
dirkx	0:355018f44c9f	1744	case '\n':
dirkx	0:355018f44c9f	1745	printer(arg, "\\n");
dirkx	0:355018f44c9f	1746	break;
dirkx	0:355018f44c9f	1747	case '\r':
dirkx	0:355018f44c9f	1748	printer(arg, "\\r");
dirkx	0:355018f44c9f	1749	break;
dirkx	0:355018f44c9f	1750	case '\t':
dirkx	0:355018f44c9f	1751	printer(arg, "\\t");
dirkx	0:355018f44c9f	1752	break;
dirkx	0:355018f44c9f	1753	default:
dirkx	0:355018f44c9f	1754	printer(arg, "\\%.3o", c);
dirkx	0:355018f44c9f	1755	}
dirkx	0:355018f44c9f	1756	}
dirkx	0:355018f44c9f	1757	}
dirkx	0:355018f44c9f	1758	printer(arg, "\"");
dirkx	0:355018f44c9f	1759	}
dirkx	0:355018f44c9f	1760
dirkx	0:355018f44c9f	1761
dirkx	0:355018f44c9f	1762	/*
dirkx	0:355018f44c9f	1763	* lcp_printpkt - print the contents of an LCP packet.
dirkx	0:355018f44c9f	1764	*/
dirkx	0:355018f44c9f	1765	static char *lcp_codenames[] = {
dirkx	0:355018f44c9f	1766	"ConfReq", "ConfAck", "ConfNak", "ConfRej",
dirkx	0:355018f44c9f	1767	"TermReq", "TermAck", "CodeRej", "ProtRej",
dirkx	0:355018f44c9f	1768	"EchoReq", "EchoRep", "DiscReq"
dirkx	0:355018f44c9f	1769	};
dirkx	0:355018f44c9f	1770
dirkx	0:355018f44c9f	1771	static int
dirkx	0:355018f44c9f	1772	lcp_printpkt( u_char p, int plen, void (printer) (void , char , ...), void *arg)
dirkx	0:355018f44c9f	1773	{
dirkx	0:355018f44c9f	1774	int code, id, len, olen;
dirkx	0:355018f44c9f	1775	u_char pstart, optend;
dirkx	0:355018f44c9f	1776	u_short cishort;
dirkx	0:355018f44c9f	1777	u32_t cilong;
dirkx	0:355018f44c9f	1778
dirkx	0:355018f44c9f	1779	if (plen < HEADERLEN) {
dirkx	0:355018f44c9f	1780	return 0;
dirkx	0:355018f44c9f	1781	}
dirkx	0:355018f44c9f	1782	pstart = p;
dirkx	0:355018f44c9f	1783	GETCHAR(code, p);
dirkx	0:355018f44c9f	1784	GETCHAR(id, p);
dirkx	0:355018f44c9f	1785	GETSHORT(len, p);
dirkx	0:355018f44c9f	1786	if (len < HEADERLEN \|\| len > plen) {
dirkx	0:355018f44c9f	1787	return 0;
dirkx	0:355018f44c9f	1788	}
dirkx	0:355018f44c9f	1789
dirkx	0:355018f44c9f	1790	if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *)) {
dirkx	0:355018f44c9f	1791	printer(arg, " %s", lcp_codenames[code-1]);
dirkx	0:355018f44c9f	1792	} else {
dirkx	0:355018f44c9f	1793	printer(arg, " code=0x%x", code);
dirkx	0:355018f44c9f	1794	}
dirkx	0:355018f44c9f	1795	printer(arg, " id=0x%x", id);
dirkx	0:355018f44c9f	1796	len -= HEADERLEN;
dirkx	0:355018f44c9f	1797	switch (code) {
dirkx	0:355018f44c9f	1798	case CONFREQ:
dirkx	0:355018f44c9f	1799	case CONFACK:
dirkx	0:355018f44c9f	1800	case CONFNAK:
dirkx	0:355018f44c9f	1801	case CONFREJ:
dirkx	0:355018f44c9f	1802	/* print option list */
dirkx	0:355018f44c9f	1803	while (len >= 2) {
dirkx	0:355018f44c9f	1804	GETCHAR(code, p);
dirkx	0:355018f44c9f	1805	GETCHAR(olen, p);
dirkx	0:355018f44c9f	1806	p -= 2;
dirkx	0:355018f44c9f	1807	if (olen < 2 \|\| olen > len) {
dirkx	0:355018f44c9f	1808	break;
dirkx	0:355018f44c9f	1809	}
dirkx	0:355018f44c9f	1810	printer(arg, " <");
dirkx	0:355018f44c9f	1811	len -= olen;
dirkx	0:355018f44c9f	1812	optend = p + olen;
dirkx	0:355018f44c9f	1813	switch (code) {
dirkx	0:355018f44c9f	1814	case CI_MRU:
dirkx	0:355018f44c9f	1815	if (olen == CILEN_SHORT) {
dirkx	0:355018f44c9f	1816	p += 2;
dirkx	0:355018f44c9f	1817	GETSHORT(cishort, p);
dirkx	0:355018f44c9f	1818	printer(arg, "mru %d", cishort);
dirkx	0:355018f44c9f	1819	}
dirkx	0:355018f44c9f	1820	break;
dirkx	0:355018f44c9f	1821	case CI_ASYNCMAP:
dirkx	0:355018f44c9f	1822	if (olen == CILEN_LONG) {
dirkx	0:355018f44c9f	1823	p += 2;
dirkx	0:355018f44c9f	1824	GETLONG(cilong, p);
dirkx	0:355018f44c9f	1825	printer(arg, "asyncmap 0x%lx", cilong);
dirkx	0:355018f44c9f	1826	}
dirkx	0:355018f44c9f	1827	break;
dirkx	0:355018f44c9f	1828	case CI_AUTHTYPE:
dirkx	0:355018f44c9f	1829	if (olen >= CILEN_SHORT) {
dirkx	0:355018f44c9f	1830	p += 2;
dirkx	0:355018f44c9f	1831	printer(arg, "auth ");
dirkx	0:355018f44c9f	1832	GETSHORT(cishort, p);
dirkx	0:355018f44c9f	1833	switch (cishort) {
dirkx	0:355018f44c9f	1834	case PPP_PAP:
dirkx	0:355018f44c9f	1835	printer(arg, "pap");
dirkx	0:355018f44c9f	1836	break;
dirkx	0:355018f44c9f	1837	case PPP_CHAP:
dirkx	0:355018f44c9f	1838	printer(arg, "chap");
dirkx	0:355018f44c9f	1839	break;
dirkx	0:355018f44c9f	1840	default:
dirkx	0:355018f44c9f	1841	printer(arg, "0x%x", cishort);
dirkx	0:355018f44c9f	1842	}
dirkx	0:355018f44c9f	1843	}
dirkx	0:355018f44c9f	1844	break;
dirkx	0:355018f44c9f	1845	case CI_QUALITY:
dirkx	0:355018f44c9f	1846	if (olen >= CILEN_SHORT) {
dirkx	0:355018f44c9f	1847	p += 2;
dirkx	0:355018f44c9f	1848	printer(arg, "quality ");
dirkx	0:355018f44c9f	1849	GETSHORT(cishort, p);
dirkx	0:355018f44c9f	1850	switch (cishort) {
dirkx	0:355018f44c9f	1851	case PPP_LQR:
dirkx	0:355018f44c9f	1852	printer(arg, "lqr");
dirkx	0:355018f44c9f	1853	break;
dirkx	0:355018f44c9f	1854	default:
dirkx	0:355018f44c9f	1855	printer(arg, "0x%x", cishort);
dirkx	0:355018f44c9f	1856	}
dirkx	0:355018f44c9f	1857	}
dirkx	0:355018f44c9f	1858	break;
dirkx	0:355018f44c9f	1859	case CI_CALLBACK:
dirkx	0:355018f44c9f	1860	if (olen >= CILEN_CHAR) {
dirkx	0:355018f44c9f	1861	p += 2;
dirkx	0:355018f44c9f	1862	printer(arg, "callback ");
dirkx	0:355018f44c9f	1863	GETSHORT(cishort, p);
dirkx	0:355018f44c9f	1864	switch (cishort) {
dirkx	0:355018f44c9f	1865	case CBCP_OPT:
dirkx	0:355018f44c9f	1866	printer(arg, "CBCP");
dirkx	0:355018f44c9f	1867	break;
dirkx	0:355018f44c9f	1868	default:
dirkx	0:355018f44c9f	1869	printer(arg, "0x%x", cishort);
dirkx	0:355018f44c9f	1870	}
dirkx	0:355018f44c9f	1871	}
dirkx	0:355018f44c9f	1872	break;
dirkx	0:355018f44c9f	1873	case CI_MAGICNUMBER:
dirkx	0:355018f44c9f	1874	if (olen == CILEN_LONG) {
dirkx	0:355018f44c9f	1875	p += 2;
dirkx	0:355018f44c9f	1876	GETLONG(cilong, p);
dirkx	0:355018f44c9f	1877	printer(arg, "magic 0x%x", cilong);
dirkx	0:355018f44c9f	1878	}
dirkx	0:355018f44c9f	1879	break;
dirkx	0:355018f44c9f	1880	case CI_PCOMPRESSION:
dirkx	0:355018f44c9f	1881	if (olen == CILEN_VOID) {
dirkx	0:355018f44c9f	1882	p += 2;
dirkx	0:355018f44c9f	1883	printer(arg, "pcomp");
dirkx	0:355018f44c9f	1884	}
dirkx	0:355018f44c9f	1885	break;
dirkx	0:355018f44c9f	1886	case CI_ACCOMPRESSION:
dirkx	0:355018f44c9f	1887	if (olen == CILEN_VOID) {
dirkx	0:355018f44c9f	1888	p += 2;
dirkx	0:355018f44c9f	1889	printer(arg, "accomp");
dirkx	0:355018f44c9f	1890	}
dirkx	0:355018f44c9f	1891	break;
dirkx	0:355018f44c9f	1892	}
dirkx	0:355018f44c9f	1893	while (p < optend) {
dirkx	0:355018f44c9f	1894	GETCHAR(code, p);
dirkx	0:355018f44c9f	1895	printer(arg, " %.2x", code);
dirkx	0:355018f44c9f	1896	}
dirkx	0:355018f44c9f	1897	printer(arg, ">");
dirkx	0:355018f44c9f	1898	}
dirkx	0:355018f44c9f	1899	break;
dirkx	0:355018f44c9f	1900
dirkx	0:355018f44c9f	1901	case TERMACK:
dirkx	0:355018f44c9f	1902	case TERMREQ:
dirkx	0:355018f44c9f	1903	if (len > 0 && p >= ' ' && p < 0x7f) {
dirkx	0:355018f44c9f	1904	printer(arg, " ");
dirkx	0:355018f44c9f	1905	print_string((char*)p, len, printer, arg);
dirkx	0:355018f44c9f	1906	p += len;
dirkx	0:355018f44c9f	1907	len = 0;
dirkx	0:355018f44c9f	1908	}
dirkx	0:355018f44c9f	1909	break;
dirkx	0:355018f44c9f	1910
dirkx	0:355018f44c9f	1911	case ECHOREQ:
dirkx	0:355018f44c9f	1912	case ECHOREP:
dirkx	0:355018f44c9f	1913	case DISCREQ:
dirkx	0:355018f44c9f	1914	if (len >= 4) {
dirkx	0:355018f44c9f	1915	GETLONG(cilong, p);
dirkx	0:355018f44c9f	1916	printer(arg, " magic=0x%x", cilong);
dirkx	0:355018f44c9f	1917	p += 4;
dirkx	0:355018f44c9f	1918	len -= 4;
dirkx	0:355018f44c9f	1919	}
dirkx	0:355018f44c9f	1920	break;
dirkx	0:355018f44c9f	1921	}
dirkx	0:355018f44c9f	1922
dirkx	0:355018f44c9f	1923	/* print the rest of the bytes in the packet */
dirkx	0:355018f44c9f	1924	for (; len > 0; --len) {
dirkx	0:355018f44c9f	1925	GETCHAR(code, p);
dirkx	0:355018f44c9f	1926	printer(arg, " %.2x", code);
dirkx	0:355018f44c9f	1927	}
dirkx	0:355018f44c9f	1928
dirkx	0:355018f44c9f	1929	return (int)(p - pstart);
dirkx	0:355018f44c9f	1930	}
dirkx	0:355018f44c9f	1931	#endif /* PPP_ADDITIONAL_CALLBACKS */
dirkx	0:355018f44c9f	1932
dirkx	0:355018f44c9f	1933	/*
dirkx	0:355018f44c9f	1934	* Time to shut down the link because there is nothing out there.
dirkx	0:355018f44c9f	1935	*/
dirkx	0:355018f44c9f	1936	static void
dirkx	0:355018f44c9f	1937	LcpLinkFailure (fsm *f)
dirkx	0:355018f44c9f	1938	{
dirkx	0:355018f44c9f	1939	if (f->state == LS_OPENED) {
dirkx	0:355018f44c9f	1940	LCPDEBUG(LOG_INFO, ("No response to %d echo-requests\n", lcp_echos_pending));
dirkx	0:355018f44c9f	1941	LCPDEBUG(LOG_NOTICE, ("Serial link appears to be disconnected.\n"));
dirkx	0:355018f44c9f	1942	lcp_close(f->unit, "Peer not responding");
dirkx	0:355018f44c9f	1943	}
dirkx	0:355018f44c9f	1944	}
dirkx	0:355018f44c9f	1945
dirkx	0:355018f44c9f	1946	/*
dirkx	0:355018f44c9f	1947	* Timer expired for the LCP echo requests from this process.
dirkx	0:355018f44c9f	1948	*/
dirkx	0:355018f44c9f	1949	static void
dirkx	0:355018f44c9f	1950	LcpEchoCheck (fsm *f)
dirkx	0:355018f44c9f	1951	{
dirkx	0:355018f44c9f	1952	LcpSendEchoRequest (f);
dirkx	0:355018f44c9f	1953
dirkx	0:355018f44c9f	1954	/*
dirkx	0:355018f44c9f	1955	* Start the timer for the next interval.
dirkx	0:355018f44c9f	1956	*/
dirkx	0:355018f44c9f	1957	LWIP_ASSERT("lcp_echo_timer_running == 0", lcp_echo_timer_running == 0);
dirkx	0:355018f44c9f	1958
dirkx	0:355018f44c9f	1959	TIMEOUT (LcpEchoTimeout, f, lcp_echo_interval);
dirkx	0:355018f44c9f	1960	lcp_echo_timer_running = 1;
dirkx	0:355018f44c9f	1961	}
dirkx	0:355018f44c9f	1962
dirkx	0:355018f44c9f	1963	/*
dirkx	0:355018f44c9f	1964	* LcpEchoTimeout - Timer expired on the LCP echo
dirkx	0:355018f44c9f	1965	*/
dirkx	0:355018f44c9f	1966	static void
dirkx	0:355018f44c9f	1967	LcpEchoTimeout (void *arg)
dirkx	0:355018f44c9f	1968	{
dirkx	0:355018f44c9f	1969	if (lcp_echo_timer_running != 0) {
dirkx	0:355018f44c9f	1970	lcp_echo_timer_running = 0;
dirkx	0:355018f44c9f	1971	LcpEchoCheck ((fsm *) arg);
dirkx	0:355018f44c9f	1972	}
dirkx	0:355018f44c9f	1973	}
dirkx	0:355018f44c9f	1974
dirkx	0:355018f44c9f	1975	/*
dirkx	0:355018f44c9f	1976	* LcpEchoReply - LCP has received a reply to the echo
dirkx	0:355018f44c9f	1977	*/
dirkx	0:355018f44c9f	1978	static void
dirkx	0:355018f44c9f	1979	lcp_received_echo_reply (fsm f, int id, u_char inp, int len)
dirkx	0:355018f44c9f	1980	{
dirkx	0:355018f44c9f	1981	u32_t magic;
dirkx	0:355018f44c9f	1982
dirkx	0:355018f44c9f	1983	LWIP_UNUSED_ARG(id);
dirkx	0:355018f44c9f	1984
dirkx	0:355018f44c9f	1985	/* Check the magic number - don't count replies from ourselves. */
dirkx	0:355018f44c9f	1986	if (len < 4) {
dirkx	0:355018f44c9f	1987	LCPDEBUG(LOG_WARNING, ("lcp: received short Echo-Reply, length %d\n", len));
dirkx	0:355018f44c9f	1988	return;
dirkx	0:355018f44c9f	1989	}
dirkx	0:355018f44c9f	1990	GETLONG(magic, inp);
dirkx	0:355018f44c9f	1991	if (lcp_gotoptions[f->unit].neg_magicnumber && magic == lcp_gotoptions[f->unit].magicnumber) {
dirkx	0:355018f44c9f	1992	LCPDEBUG(LOG_WARNING, ("appear to have received our own echo-reply!\n"));
dirkx	0:355018f44c9f	1993	return;
dirkx	0:355018f44c9f	1994	}
dirkx	0:355018f44c9f	1995
dirkx	0:355018f44c9f	1996	/* Reset the number of outstanding echo frames */
dirkx	0:355018f44c9f	1997	lcp_echos_pending = 0;
dirkx	0:355018f44c9f	1998	}
dirkx	0:355018f44c9f	1999
dirkx	0:355018f44c9f	2000	/*
dirkx	0:355018f44c9f	2001	* LcpSendEchoRequest - Send an echo request frame to the peer
dirkx	0:355018f44c9f	2002	*/
dirkx	0:355018f44c9f	2003	static void
dirkx	0:355018f44c9f	2004	LcpSendEchoRequest (fsm *f)
dirkx	0:355018f44c9f	2005	{
dirkx	0:355018f44c9f	2006	u32_t lcp_magic;
dirkx	0:355018f44c9f	2007	u_char pkt[4], *pktp;
dirkx	0:355018f44c9f	2008
dirkx	0:355018f44c9f	2009	/*
dirkx	0:355018f44c9f	2010	* Detect the failure of the peer at this point.
dirkx	0:355018f44c9f	2011	*/
dirkx	0:355018f44c9f	2012	if (lcp_echo_fails != 0) {
dirkx	0:355018f44c9f	2013	if (lcp_echos_pending++ >= lcp_echo_fails) {
dirkx	0:355018f44c9f	2014	LcpLinkFailure(f);
dirkx	0:355018f44c9f	2015	lcp_echos_pending = 0;
dirkx	0:355018f44c9f	2016	}
dirkx	0:355018f44c9f	2017	}
dirkx	0:355018f44c9f	2018
dirkx	0:355018f44c9f	2019	/*
dirkx	0:355018f44c9f	2020	* Make and send the echo request frame.
dirkx	0:355018f44c9f	2021	*/
dirkx	0:355018f44c9f	2022	if (f->state == LS_OPENED) {
dirkx	0:355018f44c9f	2023	lcp_magic = lcp_gotoptions[f->unit].magicnumber;
dirkx	0:355018f44c9f	2024	pktp = pkt;
dirkx	0:355018f44c9f	2025	PUTLONG(lcp_magic, pktp);
dirkx	0:355018f44c9f	2026	fsm_sdata(f, ECHOREQ, (u_char)(lcp_echo_number++ & 0xFF), pkt, (int)(pktp - pkt));
dirkx	0:355018f44c9f	2027	}
dirkx	0:355018f44c9f	2028	}
dirkx	0:355018f44c9f	2029
dirkx	0:355018f44c9f	2030	/*
dirkx	0:355018f44c9f	2031	* lcp_echo_lowerup - Start the timer for the LCP frame
dirkx	0:355018f44c9f	2032	*/
dirkx	0:355018f44c9f	2033
dirkx	0:355018f44c9f	2034	static void
dirkx	0:355018f44c9f	2035	lcp_echo_lowerup (int unit)
dirkx	0:355018f44c9f	2036	{
dirkx	0:355018f44c9f	2037	fsm *f = &lcp_fsm[unit];
dirkx	0:355018f44c9f	2038
dirkx	0:355018f44c9f	2039	/* Clear the parameters for generating echo frames */
dirkx	0:355018f44c9f	2040	lcp_echos_pending = 0;
dirkx	0:355018f44c9f	2041	lcp_echo_number = 0;
dirkx	0:355018f44c9f	2042	lcp_echo_timer_running = 0;
dirkx	0:355018f44c9f	2043
dirkx	0:355018f44c9f	2044	/* If a timeout interval is specified then start the timer */
dirkx	0:355018f44c9f	2045	if (lcp_echo_interval != 0) {
dirkx	0:355018f44c9f	2046	LcpEchoCheck (f);
dirkx	0:355018f44c9f	2047	}
dirkx	0:355018f44c9f	2048	}
dirkx	0:355018f44c9f	2049
dirkx	0:355018f44c9f	2050	/*
dirkx	0:355018f44c9f	2051	* lcp_echo_lowerdown - Stop the timer for the LCP frame
dirkx	0:355018f44c9f	2052	*/
dirkx	0:355018f44c9f	2053
dirkx	0:355018f44c9f	2054	static void
dirkx	0:355018f44c9f	2055	lcp_echo_lowerdown (int unit)
dirkx	0:355018f44c9f	2056	{
dirkx	0:355018f44c9f	2057	fsm *f = &lcp_fsm[unit];
dirkx	0:355018f44c9f	2058
dirkx	0:355018f44c9f	2059	if (lcp_echo_timer_running != 0) {
dirkx	0:355018f44c9f	2060	UNTIMEOUT (LcpEchoTimeout, f);
dirkx	0:355018f44c9f	2061	lcp_echo_timer_running = 0;
dirkx	0:355018f44c9f	2062	}
dirkx	0:355018f44c9f	2063	}
dirkx	0:355018f44c9f	2064
dirkx	0:355018f44c9f	2065	#endif /* PPP_SUPPORT */

Repository toolbox

Export to desktop IDE

Build repository

Repository details

Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	21 Jul 2010
Imports:	99
Forks:	0
Commits:	6
Dependents:	0
Dependencies:	1
Followers:	8

lwip/netif/ppp/lcp.c@5:8e53abda9900, 2010-08-14 (annotated)

Who changed what in which revision?

Repository toolbox

Repository details

Important Information for this Arm website

Access Warning