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This library is stripped down version of NetServices library. HTTP server and client function is NOT supported.

lwip/netif/ppp/lcp.c@0:dcf3c92487ca, 2011-07-20 (annotated)

Committer:: idinor
Date:: Wed Jul 20 11:45:39 2011 +0000
Revision:: 0:dcf3c92487ca

Who changed what in which revision?

User	Revision	Line number	New contents of line
idinor	0:dcf3c92487ca	1	/*****************************************************************************
idinor	0:dcf3c92487ca	2	* lcp.c - Network Link Control Protocol program file.
idinor	0:dcf3c92487ca	3	*
idinor	0:dcf3c92487ca	4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
idinor	0:dcf3c92487ca	5	* portions Copyright (c) 1997 by Global Election Systems Inc.
idinor	0:dcf3c92487ca	6	*
idinor	0:dcf3c92487ca	7	* The authors hereby grant permission to use, copy, modify, distribute,
idinor	0:dcf3c92487ca	8	* and license this software and its documentation for any purpose, provided
idinor	0:dcf3c92487ca	9	* that existing copyright notices are retained in all copies and that this
idinor	0:dcf3c92487ca	10	* notice and the following disclaimer are included verbatim in any
idinor	0:dcf3c92487ca	11	* distributions. No written agreement, license, or royalty fee is required
idinor	0:dcf3c92487ca	12	* for any of the authorized uses.
idinor	0:dcf3c92487ca	13	*
idinor	0:dcf3c92487ca	14	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
idinor	0:dcf3c92487ca	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
idinor	0:dcf3c92487ca	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
idinor	0:dcf3c92487ca	17	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
idinor	0:dcf3c92487ca	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
idinor	0:dcf3c92487ca	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
idinor	0:dcf3c92487ca	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
idinor	0:dcf3c92487ca	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
idinor	0:dcf3c92487ca	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
idinor	0:dcf3c92487ca	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
idinor	0:dcf3c92487ca	24	*
idinor	0:dcf3c92487ca	25	******************************************************************************
idinor	0:dcf3c92487ca	26	* REVISION HISTORY
idinor	0:dcf3c92487ca	27	*
idinor	0:dcf3c92487ca	28	* 03-01-01 Marc Boucher <marc@mbsi.ca>
idinor	0:dcf3c92487ca	29	* Ported to lwIP.
idinor	0:dcf3c92487ca	30	* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
idinor	0:dcf3c92487ca	31	* Original.
idinor	0:dcf3c92487ca	32	*****************************************************************************/
idinor	0:dcf3c92487ca	33
idinor	0:dcf3c92487ca	34	/*
idinor	0:dcf3c92487ca	35	* lcp.c - PPP Link Control Protocol.
idinor	0:dcf3c92487ca	36	*
idinor	0:dcf3c92487ca	37	* Copyright (c) 1989 Carnegie Mellon University.
idinor	0:dcf3c92487ca	38	* All rights reserved.
idinor	0:dcf3c92487ca	39	*
idinor	0:dcf3c92487ca	40	* Redistribution and use in source and binary forms are permitted
idinor	0:dcf3c92487ca	41	* provided that the above copyright notice and this paragraph are
idinor	0:dcf3c92487ca	42	* duplicated in all such forms and that any documentation,
idinor	0:dcf3c92487ca	43	* advertising materials, and other materials related to such
idinor	0:dcf3c92487ca	44	* distribution and use acknowledge that the software was developed
idinor	0:dcf3c92487ca	45	* by Carnegie Mellon University. The name of the
idinor	0:dcf3c92487ca	46	* University may not be used to endorse or promote products derived
idinor	0:dcf3c92487ca	47	* from this software without specific prior written permission.
idinor	0:dcf3c92487ca	48	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
idinor	0:dcf3c92487ca	49	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
idinor	0:dcf3c92487ca	50	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
idinor	0:dcf3c92487ca	51	*/
idinor	0:dcf3c92487ca	52
idinor	0:dcf3c92487ca	53
idinor	0:dcf3c92487ca	54	#include "lwip/opt.h"
idinor	0:dcf3c92487ca	55
idinor	0:dcf3c92487ca	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
idinor	0:dcf3c92487ca	57
idinor	0:dcf3c92487ca	58	#include "ppp.h"
idinor	0:dcf3c92487ca	59	#include "pppdebug.h"
idinor	0:dcf3c92487ca	60
idinor	0:dcf3c92487ca	61	#include "fsm.h"
idinor	0:dcf3c92487ca	62	#include "chap.h"
idinor	0:dcf3c92487ca	63	#include "magic.h"
idinor	0:dcf3c92487ca	64	#include "auth.h"
idinor	0:dcf3c92487ca	65	#include "lcp.h"
idinor	0:dcf3c92487ca	66
idinor	0:dcf3c92487ca	67	#include <string.h>
idinor	0:dcf3c92487ca	68
idinor	0:dcf3c92487ca	69	#if PPPOE_SUPPORT
idinor	0:dcf3c92487ca	70	#include "netif/ppp_oe.h"
idinor	0:dcf3c92487ca	71	#else
idinor	0:dcf3c92487ca	72	#define PPPOE_MAXMTU PPP_MAXMRU
idinor	0:dcf3c92487ca	73	#endif
idinor	0:dcf3c92487ca	74
idinor	0:dcf3c92487ca	75	#if 0 /* UNUSED */
idinor	0:dcf3c92487ca	76	/*
idinor	0:dcf3c92487ca	77	* LCP-related command-line options.
idinor	0:dcf3c92487ca	78	*/
idinor	0:dcf3c92487ca	79	int lcp_echo_interval = 0; /* Interval between LCP echo-requests */
idinor	0:dcf3c92487ca	80	int lcp_echo_fails = 0; /* Tolerance to unanswered echo-requests */
idinor	0:dcf3c92487ca	81	bool lax_recv = 0; /* accept control chars in asyncmap */
idinor	0:dcf3c92487ca	82
idinor	0:dcf3c92487ca	83	static int setescape (char **);
idinor	0:dcf3c92487ca	84
idinor	0:dcf3c92487ca	85	static option_t lcp_option_list[] = {
idinor	0:dcf3c92487ca	86	/* LCP options */
idinor	0:dcf3c92487ca	87	/* list stripped for simplicity */
idinor	0:dcf3c92487ca	88	{NULL}
idinor	0:dcf3c92487ca	89	};
idinor	0:dcf3c92487ca	90	#endif /* UNUSED */
idinor	0:dcf3c92487ca	91
idinor	0:dcf3c92487ca	92	/* options */
idinor	0:dcf3c92487ca	93	LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */
idinor	0:dcf3c92487ca	94	static u_int lcp_echo_interval = LCP_ECHOINTERVAL; /* Interval between LCP echo-requests */
idinor	0:dcf3c92487ca	95	static u_int lcp_echo_fails = LCP_MAXECHOFAILS; /* Tolerance to unanswered echo-requests */
idinor	0:dcf3c92487ca	96
idinor	0:dcf3c92487ca	97	/* global vars */
idinor	0:dcf3c92487ca	98	static fsm lcp_fsm[NUM_PPP]; /* LCP fsm structure (global)*/
idinor	0:dcf3c92487ca	99	lcp_options lcp_wantoptions[NUM_PPP]; /* Options that we want to request */
idinor	0:dcf3c92487ca	100	lcp_options lcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
idinor	0:dcf3c92487ca	101	lcp_options lcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
idinor	0:dcf3c92487ca	102	lcp_options lcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
idinor	0:dcf3c92487ca	103	ext_accm xmit_accm[NUM_PPP]; /* extended transmit ACCM */
idinor	0:dcf3c92487ca	104
idinor	0:dcf3c92487ca	105	static u32_t lcp_echos_pending = 0; /* Number of outstanding echo msgs */
idinor	0:dcf3c92487ca	106	static u32_t lcp_echo_number = 0; /* ID number of next echo frame */
idinor	0:dcf3c92487ca	107	static u32_t lcp_echo_timer_running = 0; /* TRUE if a timer is running */
idinor	0:dcf3c92487ca	108
idinor	0:dcf3c92487ca	109	/* @todo: do we really need such a large buffer? The typical 1500 bytes seem too much. */
idinor	0:dcf3c92487ca	110	static u_char nak_buffer[PPP_MRU]; /* where we construct a nak packet */
idinor	0:dcf3c92487ca	111
idinor	0:dcf3c92487ca	112	/*
idinor	0:dcf3c92487ca	113	* Callbacks for fsm code. (CI = Configuration Information)
idinor	0:dcf3c92487ca	114	*/
idinor	0:dcf3c92487ca	115	static void lcp_resetci (fsm); / Reset our CI */
idinor	0:dcf3c92487ca	116	static int lcp_cilen (fsm); / Return length of our CI */
idinor	0:dcf3c92487ca	117	static void lcp_addci (fsm, u_char, int); / Add our CI to pkt */
idinor	0:dcf3c92487ca	118	static int lcp_ackci (fsm, u_char, int); /* Peer ack'd our CI */
idinor	0:dcf3c92487ca	119	static int lcp_nakci (fsm, u_char, int); /* Peer nak'd our CI */
idinor	0:dcf3c92487ca	120	static int lcp_rejci (fsm, u_char, int); /* Peer rej'd our CI */
idinor	0:dcf3c92487ca	121	static int lcp_reqci (fsm, u_char, int, int); / Rcv peer CI */
idinor	0:dcf3c92487ca	122	static void lcp_up (fsm); / We're UP */
idinor	0:dcf3c92487ca	123	static void lcp_down (fsm); / We're DOWN */
idinor	0:dcf3c92487ca	124	static void lcp_starting (fsm); / We need lower layer up */
idinor	0:dcf3c92487ca	125	static void lcp_finished (fsm); / We need lower layer down */
idinor	0:dcf3c92487ca	126	static int lcp_extcode (fsm, int, u_char, u_char, int);
idinor	0:dcf3c92487ca	127	static void lcp_rprotrej (fsm, u_char, int);
idinor	0:dcf3c92487ca	128
idinor	0:dcf3c92487ca	129	/*
idinor	0:dcf3c92487ca	130	* routines to send LCP echos to peer
idinor	0:dcf3c92487ca	131	*/
idinor	0:dcf3c92487ca	132
idinor	0:dcf3c92487ca	133	static void lcp_echo_lowerup (int);
idinor	0:dcf3c92487ca	134	static void lcp_echo_lowerdown (int);
idinor	0:dcf3c92487ca	135	static void LcpEchoTimeout (void*);
idinor	0:dcf3c92487ca	136	static void lcp_received_echo_reply (fsm, int, u_char, int);
idinor	0:dcf3c92487ca	137	static void LcpSendEchoRequest (fsm*);
idinor	0:dcf3c92487ca	138	static void LcpLinkFailure (fsm*);
idinor	0:dcf3c92487ca	139	static void LcpEchoCheck (fsm*);
idinor	0:dcf3c92487ca	140
idinor	0:dcf3c92487ca	141	static fsm_callbacks lcp_callbacks = { /* LCP callback routines */
idinor	0:dcf3c92487ca	142	lcp_resetci, /* Reset our Configuration Information */
idinor	0:dcf3c92487ca	143	lcp_cilen, /* Length of our Configuration Information */
idinor	0:dcf3c92487ca	144	lcp_addci, /* Add our Configuration Information */
idinor	0:dcf3c92487ca	145	lcp_ackci, /* ACK our Configuration Information */
idinor	0:dcf3c92487ca	146	lcp_nakci, /* NAK our Configuration Information */
idinor	0:dcf3c92487ca	147	lcp_rejci, /* Reject our Configuration Information */
idinor	0:dcf3c92487ca	148	lcp_reqci, /* Request peer's Configuration Information */
idinor	0:dcf3c92487ca	149	lcp_up, /* Called when fsm reaches LS_OPENED state */
idinor	0:dcf3c92487ca	150	lcp_down, /* Called when fsm leaves LS_OPENED state */
idinor	0:dcf3c92487ca	151	lcp_starting, /* Called when we want the lower layer up */
idinor	0:dcf3c92487ca	152	lcp_finished, /* Called when we want the lower layer down */
idinor	0:dcf3c92487ca	153	NULL, /* Called when Protocol-Reject received */
idinor	0:dcf3c92487ca	154	NULL, /* Retransmission is necessary */
idinor	0:dcf3c92487ca	155	lcp_extcode, /* Called to handle LCP-specific codes */
idinor	0:dcf3c92487ca	156	"LCP" /* String name of protocol */
idinor	0:dcf3c92487ca	157	};
idinor	0:dcf3c92487ca	158
idinor	0:dcf3c92487ca	159	/*
idinor	0:dcf3c92487ca	160	* Protocol entry points.
idinor	0:dcf3c92487ca	161	* Some of these are called directly.
idinor	0:dcf3c92487ca	162	*/
idinor	0:dcf3c92487ca	163
idinor	0:dcf3c92487ca	164	static void lcp_input (int, u_char *, int);
idinor	0:dcf3c92487ca	165	static void lcp_protrej (int);
idinor	0:dcf3c92487ca	166
idinor	0:dcf3c92487ca	167	struct protent lcp_protent = {
idinor	0:dcf3c92487ca	168	PPP_LCP,
idinor	0:dcf3c92487ca	169	lcp_init,
idinor	0:dcf3c92487ca	170	lcp_input,
idinor	0:dcf3c92487ca	171	lcp_protrej,
idinor	0:dcf3c92487ca	172	lcp_lowerup,
idinor	0:dcf3c92487ca	173	lcp_lowerdown,
idinor	0:dcf3c92487ca	174	lcp_open,
idinor	0:dcf3c92487ca	175	lcp_close,
idinor	0:dcf3c92487ca	176	#if PPP_ADDITIONAL_CALLBACKS
idinor	0:dcf3c92487ca	177	lcp_printpkt,
idinor	0:dcf3c92487ca	178	NULL,
idinor	0:dcf3c92487ca	179	#endif /* PPP_ADDITIONAL_CALLBACKS */
idinor	0:dcf3c92487ca	180	1,
idinor	0:dcf3c92487ca	181	"LCP",
idinor	0:dcf3c92487ca	182	#if PPP_ADDITIONAL_CALLBACKS
idinor	0:dcf3c92487ca	183	NULL,
idinor	0:dcf3c92487ca	184	NULL,
idinor	0:dcf3c92487ca	185	NULL
idinor	0:dcf3c92487ca	186	#endif /* PPP_ADDITIONAL_CALLBACKS */
idinor	0:dcf3c92487ca	187	};
idinor	0:dcf3c92487ca	188
idinor	0:dcf3c92487ca	189	int lcp_loopbackfail = DEFLOOPBACKFAIL;
idinor	0:dcf3c92487ca	190
idinor	0:dcf3c92487ca	191	/*
idinor	0:dcf3c92487ca	192	* Length of each type of configuration option (in octets)
idinor	0:dcf3c92487ca	193	*/
idinor	0:dcf3c92487ca	194	#define CILEN_VOID 2
idinor	0:dcf3c92487ca	195	#define CILEN_CHAR 3
idinor	0:dcf3c92487ca	196	#define CILEN_SHORT 4 /* CILEN_VOID + sizeof(short) */
idinor	0:dcf3c92487ca	197	#define CILEN_CHAP 5 /* CILEN_VOID + sizeof(short) + 1 */
idinor	0:dcf3c92487ca	198	#define CILEN_LONG 6 /* CILEN_VOID + sizeof(long) */
idinor	0:dcf3c92487ca	199	#define CILEN_LQR 8 /* CILEN_VOID + sizeof(short) + sizeof(long) */
idinor	0:dcf3c92487ca	200	#define CILEN_CBCP 3
idinor	0:dcf3c92487ca	201
idinor	0:dcf3c92487ca	202	#define CODENAME(x) ((x) == CONFACK ? "ACK" : (x) == CONFNAK ? "NAK" : "REJ")
idinor	0:dcf3c92487ca	203
idinor	0:dcf3c92487ca	204	#if 0 /* UNUSED */
idinor	0:dcf3c92487ca	205	/*
idinor	0:dcf3c92487ca	206	* setescape - add chars to the set we escape on transmission.
idinor	0:dcf3c92487ca	207	*/
idinor	0:dcf3c92487ca	208	static int
idinor	0:dcf3c92487ca	209	setescape(argv)
idinor	0:dcf3c92487ca	210	char **argv;
idinor	0:dcf3c92487ca	211	{
idinor	0:dcf3c92487ca	212	int n, ret;
idinor	0:dcf3c92487ca	213	char p, endp;
idinor	0:dcf3c92487ca	214
idinor	0:dcf3c92487ca	215	p = *argv;
idinor	0:dcf3c92487ca	216	ret = 1;
idinor	0:dcf3c92487ca	217	while (*p) {
idinor	0:dcf3c92487ca	218	n = strtol(p, &endp, 16);
idinor	0:dcf3c92487ca	219	if (p == endp) {
idinor	0:dcf3c92487ca	220	option_error("escape parameter contains invalid hex number '%s'", p);
idinor	0:dcf3c92487ca	221	return 0;
idinor	0:dcf3c92487ca	222	}
idinor	0:dcf3c92487ca	223	p = endp;
idinor	0:dcf3c92487ca	224	if (n < 0 \|\| n == 0x5E \|\| n > 0xFF) {
idinor	0:dcf3c92487ca	225	option_error("can't escape character 0x%x", n);
idinor	0:dcf3c92487ca	226	ret = 0;
idinor	0:dcf3c92487ca	227	} else
idinor	0:dcf3c92487ca	228	xmit_accm[0][n >> 5] \|= 1 << (n & 0x1F);
idinor	0:dcf3c92487ca	229	while (p == ',' \|\| p == ' ')
idinor	0:dcf3c92487ca	230	++p;
idinor	0:dcf3c92487ca	231	}
idinor	0:dcf3c92487ca	232	return ret;
idinor	0:dcf3c92487ca	233	}
idinor	0:dcf3c92487ca	234	#endif /* UNUSED */
idinor	0:dcf3c92487ca	235
idinor	0:dcf3c92487ca	236	/*
idinor	0:dcf3c92487ca	237	* lcp_init - Initialize LCP.
idinor	0:dcf3c92487ca	238	*/
idinor	0:dcf3c92487ca	239	void
idinor	0:dcf3c92487ca	240	lcp_init(int unit)
idinor	0:dcf3c92487ca	241	{
idinor	0:dcf3c92487ca	242	fsm *f = &lcp_fsm[unit];
idinor	0:dcf3c92487ca	243	lcp_options *wo = &lcp_wantoptions[unit];
idinor	0:dcf3c92487ca	244	lcp_options *ao = &lcp_allowoptions[unit];
idinor	0:dcf3c92487ca	245
idinor	0:dcf3c92487ca	246	f->unit = unit;
idinor	0:dcf3c92487ca	247	f->protocol = PPP_LCP;
idinor	0:dcf3c92487ca	248	f->callbacks = &lcp_callbacks;
idinor	0:dcf3c92487ca	249
idinor	0:dcf3c92487ca	250	fsm_init(f);
idinor	0:dcf3c92487ca	251
idinor	0:dcf3c92487ca	252	wo->passive = 0;
idinor	0:dcf3c92487ca	253	wo->silent = 0;
idinor	0:dcf3c92487ca	254	wo->restart = 0; /* Set to 1 in kernels or multi-line implementations */
idinor	0:dcf3c92487ca	255	wo->neg_mru = 1;
idinor	0:dcf3c92487ca	256	wo->mru = PPP_DEFMRU;
idinor	0:dcf3c92487ca	257	wo->neg_asyncmap = 1;
idinor	0:dcf3c92487ca	258	wo->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
idinor	0:dcf3c92487ca	259	wo->neg_chap = 0; /* Set to 1 on server */
idinor	0:dcf3c92487ca	260	wo->neg_upap = 0; /* Set to 1 on server */
idinor	0:dcf3c92487ca	261	wo->chap_mdtype = CHAP_DIGEST_MD5;
idinor	0:dcf3c92487ca	262	wo->neg_magicnumber = 1;
idinor	0:dcf3c92487ca	263	wo->neg_pcompression = 1;
idinor	0:dcf3c92487ca	264	wo->neg_accompression = 1;
idinor	0:dcf3c92487ca	265	wo->neg_lqr = 0; /* no LQR implementation yet */
idinor	0:dcf3c92487ca	266	wo->neg_cbcp = 0;
idinor	0:dcf3c92487ca	267
idinor	0:dcf3c92487ca	268	ao->neg_mru = 1;
idinor	0:dcf3c92487ca	269	ao->mru = PPP_MAXMRU;
idinor	0:dcf3c92487ca	270	ao->neg_asyncmap = 1;
idinor	0:dcf3c92487ca	271	ao->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
idinor	0:dcf3c92487ca	272	ao->neg_chap = (CHAP_SUPPORT != 0);
idinor	0:dcf3c92487ca	273	ao->chap_mdtype = CHAP_DIGEST_MD5;
idinor	0:dcf3c92487ca	274	ao->neg_upap = (PAP_SUPPORT != 0);
idinor	0:dcf3c92487ca	275	ao->neg_magicnumber = 1;
idinor	0:dcf3c92487ca	276	ao->neg_pcompression = 1;
idinor	0:dcf3c92487ca	277	ao->neg_accompression = 1;
idinor	0:dcf3c92487ca	278	ao->neg_lqr = 0; /* no LQR implementation yet */
idinor	0:dcf3c92487ca	279	ao->neg_cbcp = (CBCP_SUPPORT != 0);
idinor	0:dcf3c92487ca	280
idinor	0:dcf3c92487ca	281	/*
idinor	0:dcf3c92487ca	282	* Set transmit escape for the flag and escape characters plus anything
idinor	0:dcf3c92487ca	283	* set for the allowable options.
idinor	0:dcf3c92487ca	284	*/
idinor	0:dcf3c92487ca	285	memset(xmit_accm[unit], 0, sizeof(xmit_accm[0]));
idinor	0:dcf3c92487ca	286	xmit_accm[unit][15] = 0x60;
idinor	0:dcf3c92487ca	287	xmit_accm[unit][0] = (u_char)((ao->asyncmap & 0xFF));
idinor	0:dcf3c92487ca	288	xmit_accm[unit][1] = (u_char)((ao->asyncmap >> 8) & 0xFF);
idinor	0:dcf3c92487ca	289	xmit_accm[unit][2] = (u_char)((ao->asyncmap >> 16) & 0xFF);
idinor	0:dcf3c92487ca	290	xmit_accm[unit][3] = (u_char)((ao->asyncmap >> 24) & 0xFF);
idinor	0:dcf3c92487ca	291	LCPDEBUG(LOG_INFO, ("lcp_init: xmit_accm=%X %X %X %X\n",
idinor	0:dcf3c92487ca	292	xmit_accm[unit][0],
idinor	0:dcf3c92487ca	293	xmit_accm[unit][1],
idinor	0:dcf3c92487ca	294	xmit_accm[unit][2],
idinor	0:dcf3c92487ca	295	xmit_accm[unit][3]));
idinor	0:dcf3c92487ca	296
idinor	0:dcf3c92487ca	297	lcp_phase[unit] = PHASE_INITIALIZE;
idinor	0:dcf3c92487ca	298	}
idinor	0:dcf3c92487ca	299
idinor	0:dcf3c92487ca	300
idinor	0:dcf3c92487ca	301	/*
idinor	0:dcf3c92487ca	302	* lcp_open - LCP is allowed to come up.
idinor	0:dcf3c92487ca	303	*/
idinor	0:dcf3c92487ca	304	void
idinor	0:dcf3c92487ca	305	lcp_open(int unit)
idinor	0:dcf3c92487ca	306	{
idinor	0:dcf3c92487ca	307	fsm *f = &lcp_fsm[unit];
idinor	0:dcf3c92487ca	308	lcp_options *wo = &lcp_wantoptions[unit];
idinor	0:dcf3c92487ca	309
idinor	0:dcf3c92487ca	310	f->flags = 0;
idinor	0:dcf3c92487ca	311	if (wo->passive) {
idinor	0:dcf3c92487ca	312	f->flags \|= OPT_PASSIVE;
idinor	0:dcf3c92487ca	313	}
idinor	0:dcf3c92487ca	314	if (wo->silent) {
idinor	0:dcf3c92487ca	315	f->flags \|= OPT_SILENT;
idinor	0:dcf3c92487ca	316	}
idinor	0:dcf3c92487ca	317	fsm_open(f);
idinor	0:dcf3c92487ca	318
idinor	0:dcf3c92487ca	319	lcp_phase[unit] = PHASE_ESTABLISH;
idinor	0:dcf3c92487ca	320	}
idinor	0:dcf3c92487ca	321
idinor	0:dcf3c92487ca	322
idinor	0:dcf3c92487ca	323	/*
idinor	0:dcf3c92487ca	324	* lcp_close - Take LCP down.
idinor	0:dcf3c92487ca	325	*/
idinor	0:dcf3c92487ca	326	void
idinor	0:dcf3c92487ca	327	lcp_close(int unit, char *reason)
idinor	0:dcf3c92487ca	328	{
idinor	0:dcf3c92487ca	329	fsm *f = &lcp_fsm[unit];
idinor	0:dcf3c92487ca	330
idinor	0:dcf3c92487ca	331	if (lcp_phase[unit] != PHASE_DEAD) {
idinor	0:dcf3c92487ca	332	lcp_phase[unit] = PHASE_TERMINATE;
idinor	0:dcf3c92487ca	333	}
idinor	0:dcf3c92487ca	334	if (f->state == LS_STOPPED && f->flags & (OPT_PASSIVE\|OPT_SILENT)) {
idinor	0:dcf3c92487ca	335	/*
idinor	0:dcf3c92487ca	336	* This action is not strictly according to the FSM in RFC1548,
idinor	0:dcf3c92487ca	337	* but it does mean that the program terminates if you do an
idinor	0:dcf3c92487ca	338	* lcp_close() in passive/silent mode when a connection hasn't
idinor	0:dcf3c92487ca	339	* been established.
idinor	0:dcf3c92487ca	340	*/
idinor	0:dcf3c92487ca	341	f->state = LS_CLOSED;
idinor	0:dcf3c92487ca	342	lcp_finished(f);
idinor	0:dcf3c92487ca	343	} else {
idinor	0:dcf3c92487ca	344	fsm_close(f, reason);
idinor	0:dcf3c92487ca	345	}
idinor	0:dcf3c92487ca	346	}
idinor	0:dcf3c92487ca	347
idinor	0:dcf3c92487ca	348
idinor	0:dcf3c92487ca	349	/*
idinor	0:dcf3c92487ca	350	* lcp_lowerup - The lower layer is up.
idinor	0:dcf3c92487ca	351	*/
idinor	0:dcf3c92487ca	352	void
idinor	0:dcf3c92487ca	353	lcp_lowerup(int unit)
idinor	0:dcf3c92487ca	354	{
idinor	0:dcf3c92487ca	355	lcp_options *wo = &lcp_wantoptions[unit];
idinor	0:dcf3c92487ca	356
idinor	0:dcf3c92487ca	357	/*
idinor	0:dcf3c92487ca	358	* Don't use A/C or protocol compression on transmission,
idinor	0:dcf3c92487ca	359	* but accept A/C and protocol compressed packets
idinor	0:dcf3c92487ca	360	* if we are going to ask for A/C and protocol compression.
idinor	0:dcf3c92487ca	361	*/
idinor	0:dcf3c92487ca	362	ppp_set_xaccm(unit, &xmit_accm[unit]);
idinor	0:dcf3c92487ca	363	ppp_send_config(unit, PPP_MRU, 0xffffffffl, 0, 0);
idinor	0:dcf3c92487ca	364	ppp_recv_config(unit, PPP_MRU, 0x00000000l,
idinor	0:dcf3c92487ca	365	wo->neg_pcompression, wo->neg_accompression);
idinor	0:dcf3c92487ca	366	peer_mru[unit] = PPP_MRU;
idinor	0:dcf3c92487ca	367	lcp_allowoptions[unit].asyncmap = (u_long)xmit_accm[unit][0]
idinor	0:dcf3c92487ca	368	\| ((u_long)xmit_accm[unit][1] << 8)
idinor	0:dcf3c92487ca	369	\| ((u_long)xmit_accm[unit][2] << 16)
idinor	0:dcf3c92487ca	370	\| ((u_long)xmit_accm[unit][3] << 24);
idinor	0:dcf3c92487ca	371	LCPDEBUG(LOG_INFO, ("lcp_lowerup: asyncmap=%X %X %X %X\n",
idinor	0:dcf3c92487ca	372	xmit_accm[unit][3],
idinor	0:dcf3c92487ca	373	xmit_accm[unit][2],
idinor	0:dcf3c92487ca	374	xmit_accm[unit][1],
idinor	0:dcf3c92487ca	375	xmit_accm[unit][0]));
idinor	0:dcf3c92487ca	376
idinor	0:dcf3c92487ca	377	fsm_lowerup(&lcp_fsm[unit]);
idinor	0:dcf3c92487ca	378	}
idinor	0:dcf3c92487ca	379
idinor	0:dcf3c92487ca	380
idinor	0:dcf3c92487ca	381	/*
idinor	0:dcf3c92487ca	382	* lcp_lowerdown - The lower layer is down.
idinor	0:dcf3c92487ca	383	*/
idinor	0:dcf3c92487ca	384	void
idinor	0:dcf3c92487ca	385	lcp_lowerdown(int unit)
idinor	0:dcf3c92487ca	386	{
idinor	0:dcf3c92487ca	387	fsm_lowerdown(&lcp_fsm[unit]);
idinor	0:dcf3c92487ca	388	}
idinor	0:dcf3c92487ca	389
idinor	0:dcf3c92487ca	390
idinor	0:dcf3c92487ca	391	/*
idinor	0:dcf3c92487ca	392	* lcp_input - Input LCP packet.
idinor	0:dcf3c92487ca	393	*/
idinor	0:dcf3c92487ca	394	static void
idinor	0:dcf3c92487ca	395	lcp_input(int unit, u_char *p, int len)
idinor	0:dcf3c92487ca	396	{
idinor	0:dcf3c92487ca	397	fsm *f = &lcp_fsm[unit];
idinor	0:dcf3c92487ca	398
idinor	0:dcf3c92487ca	399	fsm_input(f, p, len);
idinor	0:dcf3c92487ca	400	}
idinor	0:dcf3c92487ca	401
idinor	0:dcf3c92487ca	402
idinor	0:dcf3c92487ca	403	/*
idinor	0:dcf3c92487ca	404	* lcp_extcode - Handle a LCP-specific code.
idinor	0:dcf3c92487ca	405	*/
idinor	0:dcf3c92487ca	406	static int
idinor	0:dcf3c92487ca	407	lcp_extcode(fsm f, int code, u_char id, u_char inp, int len)
idinor	0:dcf3c92487ca	408	{
idinor	0:dcf3c92487ca	409	u_char *magp;
idinor	0:dcf3c92487ca	410
idinor	0:dcf3c92487ca	411	switch( code ){
idinor	0:dcf3c92487ca	412	case PROTREJ:
idinor	0:dcf3c92487ca	413	lcp_rprotrej(f, inp, len);
idinor	0:dcf3c92487ca	414	break;
idinor	0:dcf3c92487ca	415
idinor	0:dcf3c92487ca	416	case ECHOREQ:
idinor	0:dcf3c92487ca	417	if (f->state != LS_OPENED) {
idinor	0:dcf3c92487ca	418	break;
idinor	0:dcf3c92487ca	419	}
idinor	0:dcf3c92487ca	420	LCPDEBUG(LOG_INFO, ("lcp: Echo-Request, Rcvd id %d\n", id));
idinor	0:dcf3c92487ca	421	magp = inp;
idinor	0:dcf3c92487ca	422	PUTLONG(lcp_gotoptions[f->unit].magicnumber, magp);
idinor	0:dcf3c92487ca	423	fsm_sdata(f, ECHOREP, id, inp, len);
idinor	0:dcf3c92487ca	424	break;
idinor	0:dcf3c92487ca	425
idinor	0:dcf3c92487ca	426	case ECHOREP:
idinor	0:dcf3c92487ca	427	lcp_received_echo_reply(f, id, inp, len);
idinor	0:dcf3c92487ca	428	break;
idinor	0:dcf3c92487ca	429
idinor	0:dcf3c92487ca	430	case DISCREQ:
idinor	0:dcf3c92487ca	431	break;
idinor	0:dcf3c92487ca	432
idinor	0:dcf3c92487ca	433	default:
idinor	0:dcf3c92487ca	434	return 0;
idinor	0:dcf3c92487ca	435	}
idinor	0:dcf3c92487ca	436	return 1;
idinor	0:dcf3c92487ca	437	}
idinor	0:dcf3c92487ca	438
idinor	0:dcf3c92487ca	439
idinor	0:dcf3c92487ca	440	/*
idinor	0:dcf3c92487ca	441	* lcp_rprotrej - Receive an Protocol-Reject.
idinor	0:dcf3c92487ca	442	*
idinor	0:dcf3c92487ca	443	* Figure out which protocol is rejected and inform it.
idinor	0:dcf3c92487ca	444	*/
idinor	0:dcf3c92487ca	445	static void
idinor	0:dcf3c92487ca	446	lcp_rprotrej(fsm f, u_char inp, int len)
idinor	0:dcf3c92487ca	447	{
idinor	0:dcf3c92487ca	448	int i;
idinor	0:dcf3c92487ca	449	struct protent *protp;
idinor	0:dcf3c92487ca	450	u_short prot;
idinor	0:dcf3c92487ca	451
idinor	0:dcf3c92487ca	452	if (len < (int)sizeof (u_short)) {
idinor	0:dcf3c92487ca	453	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd short Protocol-Reject packet!\n"));
idinor	0:dcf3c92487ca	454	return;
idinor	0:dcf3c92487ca	455	}
idinor	0:dcf3c92487ca	456
idinor	0:dcf3c92487ca	457	GETSHORT(prot, inp);
idinor	0:dcf3c92487ca	458
idinor	0:dcf3c92487ca	459	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd Protocol-Reject packet for %x!\n", prot));
idinor	0:dcf3c92487ca	460
idinor	0:dcf3c92487ca	461	/*
idinor	0:dcf3c92487ca	462	* Protocol-Reject packets received in any state other than the LCP
idinor	0:dcf3c92487ca	463	* LS_OPENED state SHOULD be silently discarded.
idinor	0:dcf3c92487ca	464	*/
idinor	0:dcf3c92487ca	465	if( f->state != LS_OPENED ) {
idinor	0:dcf3c92487ca	466	LCPDEBUG(LOG_INFO, ("Protocol-Reject discarded: LCP in state %d\n", f->state));
idinor	0:dcf3c92487ca	467	return;
idinor	0:dcf3c92487ca	468	}
idinor	0:dcf3c92487ca	469
idinor	0:dcf3c92487ca	470	/*
idinor	0:dcf3c92487ca	471	* Upcall the proper Protocol-Reject routine.
idinor	0:dcf3c92487ca	472	*/
idinor	0:dcf3c92487ca	473	for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
idinor	0:dcf3c92487ca	474	if (protp->protocol == prot && protp->enabled_flag) {
idinor	0:dcf3c92487ca	475	(*protp->protrej)(f->unit);
idinor	0:dcf3c92487ca	476	return;
idinor	0:dcf3c92487ca	477	}
idinor	0:dcf3c92487ca	478	}
idinor	0:dcf3c92487ca	479
idinor	0:dcf3c92487ca	480	LCPDEBUG(LOG_WARNING, ("Protocol-Reject for unsupported protocol 0x%x\n", prot));
idinor	0:dcf3c92487ca	481	}
idinor	0:dcf3c92487ca	482
idinor	0:dcf3c92487ca	483
idinor	0:dcf3c92487ca	484	/*
idinor	0:dcf3c92487ca	485	* lcp_protrej - A Protocol-Reject was received.
idinor	0:dcf3c92487ca	486	*/
idinor	0:dcf3c92487ca	487	static void
idinor	0:dcf3c92487ca	488	lcp_protrej(int unit)
idinor	0:dcf3c92487ca	489	{
idinor	0:dcf3c92487ca	490	LWIP_UNUSED_ARG(unit);
idinor	0:dcf3c92487ca	491	/*
idinor	0:dcf3c92487ca	492	* Can't reject LCP!
idinor	0:dcf3c92487ca	493	*/
idinor	0:dcf3c92487ca	494	LCPDEBUG(LOG_WARNING, ("lcp_protrej: Received Protocol-Reject for LCP!\n"));
idinor	0:dcf3c92487ca	495	fsm_protreject(&lcp_fsm[unit]);
idinor	0:dcf3c92487ca	496	}
idinor	0:dcf3c92487ca	497
idinor	0:dcf3c92487ca	498
idinor	0:dcf3c92487ca	499	/*
idinor	0:dcf3c92487ca	500	* lcp_sprotrej - Send a Protocol-Reject for some protocol.
idinor	0:dcf3c92487ca	501	*/
idinor	0:dcf3c92487ca	502	void
idinor	0:dcf3c92487ca	503	lcp_sprotrej(int unit, u_char *p, int len)
idinor	0:dcf3c92487ca	504	{
idinor	0:dcf3c92487ca	505	/*
idinor	0:dcf3c92487ca	506	* Send back the protocol and the information field of the
idinor	0:dcf3c92487ca	507	* rejected packet. We only get here if LCP is in the LS_OPENED state.
idinor	0:dcf3c92487ca	508	*/
idinor	0:dcf3c92487ca	509
idinor	0:dcf3c92487ca	510	fsm_sdata(&lcp_fsm[unit], PROTREJ, ++lcp_fsm[unit].id, p, len);
idinor	0:dcf3c92487ca	511	}
idinor	0:dcf3c92487ca	512
idinor	0:dcf3c92487ca	513
idinor	0:dcf3c92487ca	514	/*
idinor	0:dcf3c92487ca	515	* lcp_resetci - Reset our CI.
idinor	0:dcf3c92487ca	516	*/
idinor	0:dcf3c92487ca	517	static void
idinor	0:dcf3c92487ca	518	lcp_resetci(fsm *f)
idinor	0:dcf3c92487ca	519	{
idinor	0:dcf3c92487ca	520	lcp_wantoptions[f->unit].magicnumber = magic();
idinor	0:dcf3c92487ca	521	lcp_wantoptions[f->unit].numloops = 0;
idinor	0:dcf3c92487ca	522	lcp_gotoptions[f->unit] = lcp_wantoptions[f->unit];
idinor	0:dcf3c92487ca	523	peer_mru[f->unit] = PPP_MRU;
idinor	0:dcf3c92487ca	524	auth_reset(f->unit);
idinor	0:dcf3c92487ca	525	}
idinor	0:dcf3c92487ca	526
idinor	0:dcf3c92487ca	527
idinor	0:dcf3c92487ca	528	/*
idinor	0:dcf3c92487ca	529	* lcp_cilen - Return length of our CI.
idinor	0:dcf3c92487ca	530	*/
idinor	0:dcf3c92487ca	531	static int
idinor	0:dcf3c92487ca	532	lcp_cilen(fsm *f)
idinor	0:dcf3c92487ca	533	{
idinor	0:dcf3c92487ca	534	lcp_options *go = &lcp_gotoptions[f->unit];
idinor	0:dcf3c92487ca	535
idinor	0:dcf3c92487ca	536	#define LENCIVOID(neg) ((neg) ? CILEN_VOID : 0)
idinor	0:dcf3c92487ca	537	#define LENCICHAP(neg) ((neg) ? CILEN_CHAP : 0)
idinor	0:dcf3c92487ca	538	#define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0)
idinor	0:dcf3c92487ca	539	#define LENCILONG(neg) ((neg) ? CILEN_LONG : 0)
idinor	0:dcf3c92487ca	540	#define LENCILQR(neg) ((neg) ? CILEN_LQR: 0)
idinor	0:dcf3c92487ca	541	#define LENCICBCP(neg) ((neg) ? CILEN_CBCP: 0)
idinor	0:dcf3c92487ca	542	/*
idinor	0:dcf3c92487ca	543	* NB: we only ask for one of CHAP and UPAP, even if we will
idinor	0:dcf3c92487ca	544	* accept either.
idinor	0:dcf3c92487ca	545	*/
idinor	0:dcf3c92487ca	546	return (LENCISHORT(go->neg_mru && go->mru != PPP_DEFMRU) +
idinor	0:dcf3c92487ca	547	LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) +
idinor	0:dcf3c92487ca	548	LENCICHAP(go->neg_chap) +
idinor	0:dcf3c92487ca	549	LENCISHORT(!go->neg_chap && go->neg_upap) +
idinor	0:dcf3c92487ca	550	LENCILQR(go->neg_lqr) +
idinor	0:dcf3c92487ca	551	LENCICBCP(go->neg_cbcp) +
idinor	0:dcf3c92487ca	552	LENCILONG(go->neg_magicnumber) +
idinor	0:dcf3c92487ca	553	LENCIVOID(go->neg_pcompression) +
idinor	0:dcf3c92487ca	554	LENCIVOID(go->neg_accompression));
idinor	0:dcf3c92487ca	555	}
idinor	0:dcf3c92487ca	556
idinor	0:dcf3c92487ca	557
idinor	0:dcf3c92487ca	558	/*
idinor	0:dcf3c92487ca	559	* lcp_addci - Add our desired CIs to a packet.
idinor	0:dcf3c92487ca	560	*/
idinor	0:dcf3c92487ca	561	static void
idinor	0:dcf3c92487ca	562	lcp_addci(fsm f, u_char ucp, int *lenp)
idinor	0:dcf3c92487ca	563	{
idinor	0:dcf3c92487ca	564	lcp_options *go = &lcp_gotoptions[f->unit];
idinor	0:dcf3c92487ca	565	u_char *start_ucp = ucp;
idinor	0:dcf3c92487ca	566
idinor	0:dcf3c92487ca	567	#define ADDCIVOID(opt, neg) \
idinor	0:dcf3c92487ca	568	if (neg) { \
idinor	0:dcf3c92487ca	569	LCPDEBUG(LOG_INFO, ("lcp_addci: opt=%d\n", opt)); \
idinor	0:dcf3c92487ca	570	PUTCHAR(opt, ucp); \
idinor	0:dcf3c92487ca	571	PUTCHAR(CILEN_VOID, ucp); \
idinor	0:dcf3c92487ca	572	}
idinor	0:dcf3c92487ca	573	#define ADDCISHORT(opt, neg, val) \
idinor	0:dcf3c92487ca	574	if (neg) { \
idinor	0:dcf3c92487ca	575	LCPDEBUG(LOG_INFO, ("lcp_addci: INT opt=%d %X\n", opt, val)); \
idinor	0:dcf3c92487ca	576	PUTCHAR(opt, ucp); \
idinor	0:dcf3c92487ca	577	PUTCHAR(CILEN_SHORT, ucp); \
idinor	0:dcf3c92487ca	578	PUTSHORT(val, ucp); \
idinor	0:dcf3c92487ca	579	}
idinor	0:dcf3c92487ca	580	#define ADDCICHAP(opt, neg, val, digest) \
idinor	0:dcf3c92487ca	581	if (neg) { \
idinor	0:dcf3c92487ca	582	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAP opt=%d %X\n", opt, val)); \
idinor	0:dcf3c92487ca	583	PUTCHAR(opt, ucp); \
idinor	0:dcf3c92487ca	584	PUTCHAR(CILEN_CHAP, ucp); \
idinor	0:dcf3c92487ca	585	PUTSHORT(val, ucp); \
idinor	0:dcf3c92487ca	586	PUTCHAR(digest, ucp); \
idinor	0:dcf3c92487ca	587	}
idinor	0:dcf3c92487ca	588	#define ADDCILONG(opt, neg, val) \
idinor	0:dcf3c92487ca	589	if (neg) { \
idinor	0:dcf3c92487ca	590	LCPDEBUG(LOG_INFO, ("lcp_addci: L opt=%d %lX\n", opt, val)); \
idinor	0:dcf3c92487ca	591	PUTCHAR(opt, ucp); \
idinor	0:dcf3c92487ca	592	PUTCHAR(CILEN_LONG, ucp); \
idinor	0:dcf3c92487ca	593	PUTLONG(val, ucp); \
idinor	0:dcf3c92487ca	594	}
idinor	0:dcf3c92487ca	595	#define ADDCILQR(opt, neg, val) \
idinor	0:dcf3c92487ca	596	if (neg) { \
idinor	0:dcf3c92487ca	597	LCPDEBUG(LOG_INFO, ("lcp_addci: LQR opt=%d %lX\n", opt, val)); \
idinor	0:dcf3c92487ca	598	PUTCHAR(opt, ucp); \
idinor	0:dcf3c92487ca	599	PUTCHAR(CILEN_LQR, ucp); \
idinor	0:dcf3c92487ca	600	PUTSHORT(PPP_LQR, ucp); \
idinor	0:dcf3c92487ca	601	PUTLONG(val, ucp); \
idinor	0:dcf3c92487ca	602	}
idinor	0:dcf3c92487ca	603	#define ADDCICHAR(opt, neg, val) \
idinor	0:dcf3c92487ca	604	if (neg) { \
idinor	0:dcf3c92487ca	605	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAR opt=%d %X '%z'\n", opt, val, val)); \
idinor	0:dcf3c92487ca	606	PUTCHAR(opt, ucp); \
idinor	0:dcf3c92487ca	607	PUTCHAR(CILEN_CHAR, ucp); \
idinor	0:dcf3c92487ca	608	PUTCHAR(val, ucp); \
idinor	0:dcf3c92487ca	609	}
idinor	0:dcf3c92487ca	610
idinor	0:dcf3c92487ca	611	ADDCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
idinor	0:dcf3c92487ca	612	ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
idinor	0:dcf3c92487ca	613	ADDCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
idinor	0:dcf3c92487ca	614	ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
idinor	0:dcf3c92487ca	615	ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
idinor	0:dcf3c92487ca	616	ADDCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
idinor	0:dcf3c92487ca	617	ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
idinor	0:dcf3c92487ca	618	ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
idinor	0:dcf3c92487ca	619	ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
idinor	0:dcf3c92487ca	620
idinor	0:dcf3c92487ca	621	if (ucp - start_ucp != *lenp) {
idinor	0:dcf3c92487ca	622	/* this should never happen, because peer_mtu should be 1500 */
idinor	0:dcf3c92487ca	623	LCPDEBUG(LOG_ERR, ("Bug in lcp_addci: wrong length\n"));
idinor	0:dcf3c92487ca	624	}
idinor	0:dcf3c92487ca	625	}
idinor	0:dcf3c92487ca	626
idinor	0:dcf3c92487ca	627
idinor	0:dcf3c92487ca	628	/*
idinor	0:dcf3c92487ca	629	* lcp_ackci - Ack our CIs.
idinor	0:dcf3c92487ca	630	* This should not modify any state if the Ack is bad.
idinor	0:dcf3c92487ca	631	*
idinor	0:dcf3c92487ca	632	* Returns:
idinor	0:dcf3c92487ca	633	* 0 - Ack was bad.
idinor	0:dcf3c92487ca	634	* 1 - Ack was good.
idinor	0:dcf3c92487ca	635	*/
idinor	0:dcf3c92487ca	636	static int
idinor	0:dcf3c92487ca	637	lcp_ackci(fsm f, u_char p, int len)
idinor	0:dcf3c92487ca	638	{
idinor	0:dcf3c92487ca	639	lcp_options *go = &lcp_gotoptions[f->unit];
idinor	0:dcf3c92487ca	640	u_char cilen, citype, cichar;
idinor	0:dcf3c92487ca	641	u_short cishort;
idinor	0:dcf3c92487ca	642	u32_t cilong;
idinor	0:dcf3c92487ca	643
idinor	0:dcf3c92487ca	644	/*
idinor	0:dcf3c92487ca	645	* CIs must be in exactly the same order that we sent.
idinor	0:dcf3c92487ca	646	* Check packet length and CI length at each step.
idinor	0:dcf3c92487ca	647	* If we find any deviations, then this packet is bad.
idinor	0:dcf3c92487ca	648	*/
idinor	0:dcf3c92487ca	649	#define ACKCIVOID(opt, neg) \
idinor	0:dcf3c92487ca	650	if (neg) { \
idinor	0:dcf3c92487ca	651	if ((len -= CILEN_VOID) < 0) \
idinor	0:dcf3c92487ca	652	goto bad; \
idinor	0:dcf3c92487ca	653	GETCHAR(citype, p); \
idinor	0:dcf3c92487ca	654	GETCHAR(cilen, p); \
idinor	0:dcf3c92487ca	655	if (cilen != CILEN_VOID \|\| citype != opt) \
idinor	0:dcf3c92487ca	656	goto bad; \
idinor	0:dcf3c92487ca	657	}
idinor	0:dcf3c92487ca	658	#define ACKCISHORT(opt, neg, val) \
idinor	0:dcf3c92487ca	659	if (neg) { \
idinor	0:dcf3c92487ca	660	if ((len -= CILEN_SHORT) < 0) \
idinor	0:dcf3c92487ca	661	goto bad; \
idinor	0:dcf3c92487ca	662	GETCHAR(citype, p); \
idinor	0:dcf3c92487ca	663	GETCHAR(cilen, p); \
idinor	0:dcf3c92487ca	664	if (cilen != CILEN_SHORT \|\| citype != opt) \
idinor	0:dcf3c92487ca	665	goto bad; \
idinor	0:dcf3c92487ca	666	GETSHORT(cishort, p); \
idinor	0:dcf3c92487ca	667	if (cishort != val) \
idinor	0:dcf3c92487ca	668	goto bad; \
idinor	0:dcf3c92487ca	669	}
idinor	0:dcf3c92487ca	670	#define ACKCICHAR(opt, neg, val) \
idinor	0:dcf3c92487ca	671	if (neg) { \
idinor	0:dcf3c92487ca	672	if ((len -= CILEN_CHAR) < 0) \
idinor	0:dcf3c92487ca	673	goto bad; \
idinor	0:dcf3c92487ca	674	GETCHAR(citype, p); \
idinor	0:dcf3c92487ca	675	GETCHAR(cilen, p); \
idinor	0:dcf3c92487ca	676	if (cilen != CILEN_CHAR \|\| citype != opt) \
idinor	0:dcf3c92487ca	677	goto bad; \
idinor	0:dcf3c92487ca	678	GETCHAR(cichar, p); \
idinor	0:dcf3c92487ca	679	if (cichar != val) \
idinor	0:dcf3c92487ca	680	goto bad; \
idinor	0:dcf3c92487ca	681	}
idinor	0:dcf3c92487ca	682	#define ACKCICHAP(opt, neg, val, digest) \
idinor	0:dcf3c92487ca	683	if (neg) { \
idinor	0:dcf3c92487ca	684	if ((len -= CILEN_CHAP) < 0) \
idinor	0:dcf3c92487ca	685	goto bad; \
idinor	0:dcf3c92487ca	686	GETCHAR(citype, p); \
idinor	0:dcf3c92487ca	687	GETCHAR(cilen, p); \
idinor	0:dcf3c92487ca	688	if (cilen != CILEN_CHAP \|\| citype != opt) \
idinor	0:dcf3c92487ca	689	goto bad; \
idinor	0:dcf3c92487ca	690	GETSHORT(cishort, p); \
idinor	0:dcf3c92487ca	691	if (cishort != val) \
idinor	0:dcf3c92487ca	692	goto bad; \
idinor	0:dcf3c92487ca	693	GETCHAR(cichar, p); \
idinor	0:dcf3c92487ca	694	if (cichar != digest) \
idinor	0:dcf3c92487ca	695	goto bad; \
idinor	0:dcf3c92487ca	696	}
idinor	0:dcf3c92487ca	697	#define ACKCILONG(opt, neg, val) \
idinor	0:dcf3c92487ca	698	if (neg) { \
idinor	0:dcf3c92487ca	699	if ((len -= CILEN_LONG) < 0) \
idinor	0:dcf3c92487ca	700	goto bad; \
idinor	0:dcf3c92487ca	701	GETCHAR(citype, p); \
idinor	0:dcf3c92487ca	702	GETCHAR(cilen, p); \
idinor	0:dcf3c92487ca	703	if (cilen != CILEN_LONG \|\| citype != opt) \
idinor	0:dcf3c92487ca	704	goto bad; \
idinor	0:dcf3c92487ca	705	GETLONG(cilong, p); \
idinor	0:dcf3c92487ca	706	if (cilong != val) \
idinor	0:dcf3c92487ca	707	goto bad; \
idinor	0:dcf3c92487ca	708	}
idinor	0:dcf3c92487ca	709	#define ACKCILQR(opt, neg, val) \
idinor	0:dcf3c92487ca	710	if (neg) { \
idinor	0:dcf3c92487ca	711	if ((len -= CILEN_LQR) < 0) \
idinor	0:dcf3c92487ca	712	goto bad; \
idinor	0:dcf3c92487ca	713	GETCHAR(citype, p); \
idinor	0:dcf3c92487ca	714	GETCHAR(cilen, p); \
idinor	0:dcf3c92487ca	715	if (cilen != CILEN_LQR \|\| citype != opt) \
idinor	0:dcf3c92487ca	716	goto bad; \
idinor	0:dcf3c92487ca	717	GETSHORT(cishort, p); \
idinor	0:dcf3c92487ca	718	if (cishort != PPP_LQR) \
idinor	0:dcf3c92487ca	719	goto bad; \
idinor	0:dcf3c92487ca	720	GETLONG(cilong, p); \
idinor	0:dcf3c92487ca	721	if (cilong != val) \
idinor	0:dcf3c92487ca	722	goto bad; \
idinor	0:dcf3c92487ca	723	}
idinor	0:dcf3c92487ca	724
idinor	0:dcf3c92487ca	725	ACKCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
idinor	0:dcf3c92487ca	726	ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
idinor	0:dcf3c92487ca	727	ACKCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
idinor	0:dcf3c92487ca	728	ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
idinor	0:dcf3c92487ca	729	ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
idinor	0:dcf3c92487ca	730	ACKCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
idinor	0:dcf3c92487ca	731	ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
idinor	0:dcf3c92487ca	732	ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
idinor	0:dcf3c92487ca	733	ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
idinor	0:dcf3c92487ca	734
idinor	0:dcf3c92487ca	735	/*
idinor	0:dcf3c92487ca	736	* If there are any remaining CIs, then this packet is bad.
idinor	0:dcf3c92487ca	737	*/
idinor	0:dcf3c92487ca	738	if (len != 0) {
idinor	0:dcf3c92487ca	739	goto bad;
idinor	0:dcf3c92487ca	740	}
idinor	0:dcf3c92487ca	741	LCPDEBUG(LOG_INFO, ("lcp_acki: Ack\n"));
idinor	0:dcf3c92487ca	742	return (1);
idinor	0:dcf3c92487ca	743	bad:
idinor	0:dcf3c92487ca	744	LCPDEBUG(LOG_WARNING, ("lcp_acki: received bad Ack!\n"));
idinor	0:dcf3c92487ca	745	return (0);
idinor	0:dcf3c92487ca	746	}
idinor	0:dcf3c92487ca	747
idinor	0:dcf3c92487ca	748
idinor	0:dcf3c92487ca	749	/*
idinor	0:dcf3c92487ca	750	* lcp_nakci - Peer has sent a NAK for some of our CIs.
idinor	0:dcf3c92487ca	751	* This should not modify any state if the Nak is bad
idinor	0:dcf3c92487ca	752	* or if LCP is in the LS_OPENED state.
idinor	0:dcf3c92487ca	753	*
idinor	0:dcf3c92487ca	754	* Returns:
idinor	0:dcf3c92487ca	755	* 0 - Nak was bad.
idinor	0:dcf3c92487ca	756	* 1 - Nak was good.
idinor	0:dcf3c92487ca	757	*/
idinor	0:dcf3c92487ca	758	static int
idinor	0:dcf3c92487ca	759	lcp_nakci(fsm f, u_char p, int len)
idinor	0:dcf3c92487ca	760	{
idinor	0:dcf3c92487ca	761	lcp_options *go = &lcp_gotoptions[f->unit];
idinor	0:dcf3c92487ca	762	lcp_options *wo = &lcp_wantoptions[f->unit];
idinor	0:dcf3c92487ca	763	u_char citype, cichar, *next;
idinor	0:dcf3c92487ca	764	u_short cishort;
idinor	0:dcf3c92487ca	765	u32_t cilong;
idinor	0:dcf3c92487ca	766	lcp_options no; /* options we've seen Naks for */
idinor	0:dcf3c92487ca	767	lcp_options try; /* options to request next time */
idinor	0:dcf3c92487ca	768	int looped_back = 0;
idinor	0:dcf3c92487ca	769	int cilen;
idinor	0:dcf3c92487ca	770
idinor	0:dcf3c92487ca	771	BZERO(&no, sizeof(no));
idinor	0:dcf3c92487ca	772	try = *go;
idinor	0:dcf3c92487ca	773
idinor	0:dcf3c92487ca	774	/*
idinor	0:dcf3c92487ca	775	* Any Nak'd CIs must be in exactly the same order that we sent.
idinor	0:dcf3c92487ca	776	* Check packet length and CI length at each step.
idinor	0:dcf3c92487ca	777	* If we find any deviations, then this packet is bad.
idinor	0:dcf3c92487ca	778	*/
idinor	0:dcf3c92487ca	779	#define NAKCIVOID(opt, neg, code) \
idinor	0:dcf3c92487ca	780	if (go->neg && \
idinor	0:dcf3c92487ca	781	len >= CILEN_VOID && \
idinor	0:dcf3c92487ca	782	p[1] == CILEN_VOID && \
idinor	0:dcf3c92487ca	783	p[0] == opt) { \
idinor	0:dcf3c92487ca	784	len -= CILEN_VOID; \
idinor	0:dcf3c92487ca	785	INCPTR(CILEN_VOID, p); \
idinor	0:dcf3c92487ca	786	no.neg = 1; \
idinor	0:dcf3c92487ca	787	code \
idinor	0:dcf3c92487ca	788	}
idinor	0:dcf3c92487ca	789	#define NAKCICHAP(opt, neg, code) \
idinor	0:dcf3c92487ca	790	if (go->neg && \
idinor	0:dcf3c92487ca	791	len >= CILEN_CHAP && \
idinor	0:dcf3c92487ca	792	p[1] == CILEN_CHAP && \
idinor	0:dcf3c92487ca	793	p[0] == opt) { \
idinor	0:dcf3c92487ca	794	len -= CILEN_CHAP; \
idinor	0:dcf3c92487ca	795	INCPTR(2, p); \
idinor	0:dcf3c92487ca	796	GETSHORT(cishort, p); \
idinor	0:dcf3c92487ca	797	GETCHAR(cichar, p); \
idinor	0:dcf3c92487ca	798	no.neg = 1; \
idinor	0:dcf3c92487ca	799	code \
idinor	0:dcf3c92487ca	800	}
idinor	0:dcf3c92487ca	801	#define NAKCICHAR(opt, neg, code) \
idinor	0:dcf3c92487ca	802	if (go->neg && \
idinor	0:dcf3c92487ca	803	len >= CILEN_CHAR && \
idinor	0:dcf3c92487ca	804	p[1] == CILEN_CHAR && \
idinor	0:dcf3c92487ca	805	p[0] == opt) { \
idinor	0:dcf3c92487ca	806	len -= CILEN_CHAR; \
idinor	0:dcf3c92487ca	807	INCPTR(2, p); \
idinor	0:dcf3c92487ca	808	GETCHAR(cichar, p); \
idinor	0:dcf3c92487ca	809	no.neg = 1; \
idinor	0:dcf3c92487ca	810	code \
idinor	0:dcf3c92487ca	811	}
idinor	0:dcf3c92487ca	812	#define NAKCISHORT(opt, neg, code) \
idinor	0:dcf3c92487ca	813	if (go->neg && \
idinor	0:dcf3c92487ca	814	len >= CILEN_SHORT && \
idinor	0:dcf3c92487ca	815	p[1] == CILEN_SHORT && \
idinor	0:dcf3c92487ca	816	p[0] == opt) { \
idinor	0:dcf3c92487ca	817	len -= CILEN_SHORT; \
idinor	0:dcf3c92487ca	818	INCPTR(2, p); \
idinor	0:dcf3c92487ca	819	GETSHORT(cishort, p); \
idinor	0:dcf3c92487ca	820	no.neg = 1; \
idinor	0:dcf3c92487ca	821	code \
idinor	0:dcf3c92487ca	822	}
idinor	0:dcf3c92487ca	823	#define NAKCILONG(opt, neg, code) \
idinor	0:dcf3c92487ca	824	if (go->neg && \
idinor	0:dcf3c92487ca	825	len >= CILEN_LONG && \
idinor	0:dcf3c92487ca	826	p[1] == CILEN_LONG && \
idinor	0:dcf3c92487ca	827	p[0] == opt) { \
idinor	0:dcf3c92487ca	828	len -= CILEN_LONG; \
idinor	0:dcf3c92487ca	829	INCPTR(2, p); \
idinor	0:dcf3c92487ca	830	GETLONG(cilong, p); \
idinor	0:dcf3c92487ca	831	no.neg = 1; \
idinor	0:dcf3c92487ca	832	code \
idinor	0:dcf3c92487ca	833	}
idinor	0:dcf3c92487ca	834	#define NAKCILQR(opt, neg, code) \
idinor	0:dcf3c92487ca	835	if (go->neg && \
idinor	0:dcf3c92487ca	836	len >= CILEN_LQR && \
idinor	0:dcf3c92487ca	837	p[1] == CILEN_LQR && \
idinor	0:dcf3c92487ca	838	p[0] == opt) { \
idinor	0:dcf3c92487ca	839	len -= CILEN_LQR; \
idinor	0:dcf3c92487ca	840	INCPTR(2, p); \
idinor	0:dcf3c92487ca	841	GETSHORT(cishort, p); \
idinor	0:dcf3c92487ca	842	GETLONG(cilong, p); \
idinor	0:dcf3c92487ca	843	no.neg = 1; \
idinor	0:dcf3c92487ca	844	code \
idinor	0:dcf3c92487ca	845	}
idinor	0:dcf3c92487ca	846
idinor	0:dcf3c92487ca	847	/*
idinor	0:dcf3c92487ca	848	* We don't care if they want to send us smaller packets than
idinor	0:dcf3c92487ca	849	* we want. Therefore, accept any MRU less than what we asked for,
idinor	0:dcf3c92487ca	850	* but then ignore the new value when setting the MRU in the kernel.
idinor	0:dcf3c92487ca	851	* If they send us a bigger MRU than what we asked, accept it, up to
idinor	0:dcf3c92487ca	852	* the limit of the default MRU we'd get if we didn't negotiate.
idinor	0:dcf3c92487ca	853	*/
idinor	0:dcf3c92487ca	854	if (go->neg_mru && go->mru != PPP_DEFMRU) {
idinor	0:dcf3c92487ca	855	NAKCISHORT(CI_MRU, neg_mru,
idinor	0:dcf3c92487ca	856	if (cishort <= wo->mru \|\| cishort < PPP_DEFMRU) {
idinor	0:dcf3c92487ca	857	try.mru = cishort;
idinor	0:dcf3c92487ca	858	}
idinor	0:dcf3c92487ca	859	);
idinor	0:dcf3c92487ca	860	}
idinor	0:dcf3c92487ca	861
idinor	0:dcf3c92487ca	862	/*
idinor	0:dcf3c92487ca	863	* Add any characters they want to our (receive-side) asyncmap.
idinor	0:dcf3c92487ca	864	*/
idinor	0:dcf3c92487ca	865	if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) {
idinor	0:dcf3c92487ca	866	NAKCILONG(CI_ASYNCMAP, neg_asyncmap,
idinor	0:dcf3c92487ca	867	try.asyncmap = go->asyncmap \| cilong;
idinor	0:dcf3c92487ca	868	);
idinor	0:dcf3c92487ca	869	}
idinor	0:dcf3c92487ca	870
idinor	0:dcf3c92487ca	871	/*
idinor	0:dcf3c92487ca	872	* If they've nak'd our authentication-protocol, check whether
idinor	0:dcf3c92487ca	873	* they are proposing a different protocol, or a different
idinor	0:dcf3c92487ca	874	* hash algorithm for CHAP.
idinor	0:dcf3c92487ca	875	*/
idinor	0:dcf3c92487ca	876	if ((go->neg_chap \|\| go->neg_upap)
idinor	0:dcf3c92487ca	877	&& len >= CILEN_SHORT
idinor	0:dcf3c92487ca	878	&& p[0] == CI_AUTHTYPE && p[1] >= CILEN_SHORT && p[1] <= len) {
idinor	0:dcf3c92487ca	879	cilen = p[1];
idinor	0:dcf3c92487ca	880	len -= cilen;
idinor	0:dcf3c92487ca	881	no.neg_chap = go->neg_chap;
idinor	0:dcf3c92487ca	882	no.neg_upap = go->neg_upap;
idinor	0:dcf3c92487ca	883	INCPTR(2, p);
idinor	0:dcf3c92487ca	884	GETSHORT(cishort, p);
idinor	0:dcf3c92487ca	885	if (cishort == PPP_PAP && cilen == CILEN_SHORT) {
idinor	0:dcf3c92487ca	886	/*
idinor	0:dcf3c92487ca	887	* If we were asking for CHAP, they obviously don't want to do it.
idinor	0:dcf3c92487ca	888	* If we weren't asking for CHAP, then we were asking for PAP,
idinor	0:dcf3c92487ca	889	* in which case this Nak is bad.
idinor	0:dcf3c92487ca	890	*/
idinor	0:dcf3c92487ca	891	if (!go->neg_chap) {
idinor	0:dcf3c92487ca	892	goto bad;
idinor	0:dcf3c92487ca	893	}
idinor	0:dcf3c92487ca	894	try.neg_chap = 0;
idinor	0:dcf3c92487ca	895
idinor	0:dcf3c92487ca	896	} else if (cishort == PPP_CHAP && cilen == CILEN_CHAP) {
idinor	0:dcf3c92487ca	897	GETCHAR(cichar, p);
idinor	0:dcf3c92487ca	898	if (go->neg_chap) {
idinor	0:dcf3c92487ca	899	/*
idinor	0:dcf3c92487ca	900	* We were asking for CHAP/MD5; they must want a different
idinor	0:dcf3c92487ca	901	* algorithm. If they can't do MD5, we'll have to stop
idinor	0:dcf3c92487ca	902	* asking for CHAP.
idinor	0:dcf3c92487ca	903	*/
idinor	0:dcf3c92487ca	904	if (cichar != go->chap_mdtype) {
idinor	0:dcf3c92487ca	905	try.neg_chap = 0;
idinor	0:dcf3c92487ca	906	}
idinor	0:dcf3c92487ca	907	} else {
idinor	0:dcf3c92487ca	908	/*
idinor	0:dcf3c92487ca	909	* Stop asking for PAP if we were asking for it.
idinor	0:dcf3c92487ca	910	*/
idinor	0:dcf3c92487ca	911	try.neg_upap = 0;
idinor	0:dcf3c92487ca	912	}
idinor	0:dcf3c92487ca	913
idinor	0:dcf3c92487ca	914	} else {
idinor	0:dcf3c92487ca	915	/*
idinor	0:dcf3c92487ca	916	* We don't recognize what they're suggesting.
idinor	0:dcf3c92487ca	917	* Stop asking for what we were asking for.
idinor	0:dcf3c92487ca	918	*/
idinor	0:dcf3c92487ca	919	if (go->neg_chap) {
idinor	0:dcf3c92487ca	920	try.neg_chap = 0;
idinor	0:dcf3c92487ca	921	} else {
idinor	0:dcf3c92487ca	922	try.neg_upap = 0;
idinor	0:dcf3c92487ca	923	}
idinor	0:dcf3c92487ca	924	p += cilen - CILEN_SHORT;
idinor	0:dcf3c92487ca	925	}
idinor	0:dcf3c92487ca	926	}
idinor	0:dcf3c92487ca	927
idinor	0:dcf3c92487ca	928	/*
idinor	0:dcf3c92487ca	929	* If they can't cope with our link quality protocol, we'll have
idinor	0:dcf3c92487ca	930	* to stop asking for LQR. We haven't got any other protocol.
idinor	0:dcf3c92487ca	931	* If they Nak the reporting period, take their value XXX ?
idinor	0:dcf3c92487ca	932	*/
idinor	0:dcf3c92487ca	933	NAKCILQR(CI_QUALITY, neg_lqr,
idinor	0:dcf3c92487ca	934	if (cishort != PPP_LQR) {
idinor	0:dcf3c92487ca	935	try.neg_lqr = 0;
idinor	0:dcf3c92487ca	936	} else {
idinor	0:dcf3c92487ca	937	try.lqr_period = cilong;
idinor	0:dcf3c92487ca	938	}
idinor	0:dcf3c92487ca	939	);
idinor	0:dcf3c92487ca	940
idinor	0:dcf3c92487ca	941	/*
idinor	0:dcf3c92487ca	942	* Only implementing CBCP...not the rest of the callback options
idinor	0:dcf3c92487ca	943	*/
idinor	0:dcf3c92487ca	944	NAKCICHAR(CI_CALLBACK, neg_cbcp,
idinor	0:dcf3c92487ca	945	try.neg_cbcp = 0;
idinor	0:dcf3c92487ca	946	);
idinor	0:dcf3c92487ca	947
idinor	0:dcf3c92487ca	948	/*
idinor	0:dcf3c92487ca	949	* Check for a looped-back line.
idinor	0:dcf3c92487ca	950	*/
idinor	0:dcf3c92487ca	951	NAKCILONG(CI_MAGICNUMBER, neg_magicnumber,
idinor	0:dcf3c92487ca	952	try.magicnumber = magic();
idinor	0:dcf3c92487ca	953	looped_back = 1;
idinor	0:dcf3c92487ca	954	);
idinor	0:dcf3c92487ca	955
idinor	0:dcf3c92487ca	956	/*
idinor	0:dcf3c92487ca	957	* Peer shouldn't send Nak for protocol compression or
idinor	0:dcf3c92487ca	958	* address/control compression requests; they should send
idinor	0:dcf3c92487ca	959	* a Reject instead. If they send a Nak, treat it as a Reject.
idinor	0:dcf3c92487ca	960	*/
idinor	0:dcf3c92487ca	961	NAKCIVOID(CI_PCOMPRESSION, neg_pcompression,
idinor	0:dcf3c92487ca	962	try.neg_pcompression = 0;
idinor	0:dcf3c92487ca	963	);
idinor	0:dcf3c92487ca	964	NAKCIVOID(CI_ACCOMPRESSION, neg_accompression,
idinor	0:dcf3c92487ca	965	try.neg_accompression = 0;
idinor	0:dcf3c92487ca	966	);
idinor	0:dcf3c92487ca	967
idinor	0:dcf3c92487ca	968	/*
idinor	0:dcf3c92487ca	969	* There may be remaining CIs, if the peer is requesting negotiation
idinor	0:dcf3c92487ca	970	* on an option that we didn't include in our request packet.
idinor	0:dcf3c92487ca	971	* If we see an option that we requested, or one we've already seen
idinor	0:dcf3c92487ca	972	* in this packet, then this packet is bad.
idinor	0:dcf3c92487ca	973	* If we wanted to respond by starting to negotiate on the requested
idinor	0:dcf3c92487ca	974	* option(s), we could, but we don't, because except for the
idinor	0:dcf3c92487ca	975	* authentication type and quality protocol, if we are not negotiating
idinor	0:dcf3c92487ca	976	* an option, it is because we were told not to.
idinor	0:dcf3c92487ca	977	* For the authentication type, the Nak from the peer means
idinor	0:dcf3c92487ca	978	* `let me authenticate myself with you' which is a bit pointless.
idinor	0:dcf3c92487ca	979	* For the quality protocol, the Nak means `ask me to send you quality
idinor	0:dcf3c92487ca	980	* reports', but if we didn't ask for them, we don't want them.
idinor	0:dcf3c92487ca	981	* An option we don't recognize represents the peer asking to
idinor	0:dcf3c92487ca	982	* negotiate some option we don't support, so ignore it.
idinor	0:dcf3c92487ca	983	*/
idinor	0:dcf3c92487ca	984	while (len > CILEN_VOID) {
idinor	0:dcf3c92487ca	985	GETCHAR(citype, p);
idinor	0:dcf3c92487ca	986	GETCHAR(cilen, p);
idinor	0:dcf3c92487ca	987	if (cilen < CILEN_VOID \|\| (len -= cilen) < 0) {
idinor	0:dcf3c92487ca	988	goto bad;
idinor	0:dcf3c92487ca	989	}
idinor	0:dcf3c92487ca	990	next = p + cilen - 2;
idinor	0:dcf3c92487ca	991
idinor	0:dcf3c92487ca	992	switch (citype) {
idinor	0:dcf3c92487ca	993	case CI_MRU:
idinor	0:dcf3c92487ca	994	if ((go->neg_mru && go->mru != PPP_DEFMRU)
idinor	0:dcf3c92487ca	995	\|\| no.neg_mru \|\| cilen != CILEN_SHORT) {
idinor	0:dcf3c92487ca	996	goto bad;
idinor	0:dcf3c92487ca	997	}
idinor	0:dcf3c92487ca	998	GETSHORT(cishort, p);
idinor	0:dcf3c92487ca	999	if (cishort < PPP_DEFMRU) {
idinor	0:dcf3c92487ca	1000	try.mru = cishort;
idinor	0:dcf3c92487ca	1001	}
idinor	0:dcf3c92487ca	1002	break;
idinor	0:dcf3c92487ca	1003	case CI_ASYNCMAP:
idinor	0:dcf3c92487ca	1004	if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl)
idinor	0:dcf3c92487ca	1005	\|\| no.neg_asyncmap \|\| cilen != CILEN_LONG) {
idinor	0:dcf3c92487ca	1006	goto bad;
idinor	0:dcf3c92487ca	1007	}
idinor	0:dcf3c92487ca	1008	break;
idinor	0:dcf3c92487ca	1009	case CI_AUTHTYPE:
idinor	0:dcf3c92487ca	1010	if (go->neg_chap \|\| no.neg_chap \|\| go->neg_upap \|\| no.neg_upap) {
idinor	0:dcf3c92487ca	1011	goto bad;
idinor	0:dcf3c92487ca	1012	}
idinor	0:dcf3c92487ca	1013	break;
idinor	0:dcf3c92487ca	1014	case CI_MAGICNUMBER:
idinor	0:dcf3c92487ca	1015	if (go->neg_magicnumber \|\| no.neg_magicnumber \|\|
idinor	0:dcf3c92487ca	1016	cilen != CILEN_LONG) {
idinor	0:dcf3c92487ca	1017	goto bad;
idinor	0:dcf3c92487ca	1018	}
idinor	0:dcf3c92487ca	1019	break;
idinor	0:dcf3c92487ca	1020	case CI_PCOMPRESSION:
idinor	0:dcf3c92487ca	1021	if (go->neg_pcompression \|\| no.neg_pcompression
idinor	0:dcf3c92487ca	1022	\|\| cilen != CILEN_VOID) {
idinor	0:dcf3c92487ca	1023	goto bad;
idinor	0:dcf3c92487ca	1024	}
idinor	0:dcf3c92487ca	1025	break;
idinor	0:dcf3c92487ca	1026	case CI_ACCOMPRESSION:
idinor	0:dcf3c92487ca	1027	if (go->neg_accompression \|\| no.neg_accompression
idinor	0:dcf3c92487ca	1028	\|\| cilen != CILEN_VOID) {
idinor	0:dcf3c92487ca	1029	goto bad;
idinor	0:dcf3c92487ca	1030	}
idinor	0:dcf3c92487ca	1031	break;
idinor	0:dcf3c92487ca	1032	case CI_QUALITY:
idinor	0:dcf3c92487ca	1033	if (go->neg_lqr \|\| no.neg_lqr \|\| cilen != CILEN_LQR) {
idinor	0:dcf3c92487ca	1034	goto bad;
idinor	0:dcf3c92487ca	1035	}
idinor	0:dcf3c92487ca	1036	break;
idinor	0:dcf3c92487ca	1037	}
idinor	0:dcf3c92487ca	1038	p = next;
idinor	0:dcf3c92487ca	1039	}
idinor	0:dcf3c92487ca	1040
idinor	0:dcf3c92487ca	1041	/* If there is still anything left, this packet is bad. */
idinor	0:dcf3c92487ca	1042	if (len != 0) {
idinor	0:dcf3c92487ca	1043	goto bad;
idinor	0:dcf3c92487ca	1044	}
idinor	0:dcf3c92487ca	1045
idinor	0:dcf3c92487ca	1046	/*
idinor	0:dcf3c92487ca	1047	* OK, the Nak is good. Now we can update state.
idinor	0:dcf3c92487ca	1048	*/
idinor	0:dcf3c92487ca	1049	if (f->state != LS_OPENED) {
idinor	0:dcf3c92487ca	1050	if (looped_back) {
idinor	0:dcf3c92487ca	1051	if (++try.numloops >= lcp_loopbackfail) {
idinor	0:dcf3c92487ca	1052	LCPDEBUG(LOG_NOTICE, ("Serial line is looped back.\n"));
idinor	0:dcf3c92487ca	1053	lcp_close(f->unit, "Loopback detected");
idinor	0:dcf3c92487ca	1054	}
idinor	0:dcf3c92487ca	1055	} else {
idinor	0:dcf3c92487ca	1056	try.numloops = 0;
idinor	0:dcf3c92487ca	1057	}
idinor	0:dcf3c92487ca	1058	*go = try;
idinor	0:dcf3c92487ca	1059	}
idinor	0:dcf3c92487ca	1060
idinor	0:dcf3c92487ca	1061	return 1;
idinor	0:dcf3c92487ca	1062
idinor	0:dcf3c92487ca	1063	bad:
idinor	0:dcf3c92487ca	1064	LCPDEBUG(LOG_WARNING, ("lcp_nakci: received bad Nak!\n"));
idinor	0:dcf3c92487ca	1065	return 0;
idinor	0:dcf3c92487ca	1066	}
idinor	0:dcf3c92487ca	1067
idinor	0:dcf3c92487ca	1068
idinor	0:dcf3c92487ca	1069	/*
idinor	0:dcf3c92487ca	1070	* lcp_rejci - Peer has Rejected some of our CIs.
idinor	0:dcf3c92487ca	1071	* This should not modify any state if the Reject is bad
idinor	0:dcf3c92487ca	1072	* or if LCP is in the LS_OPENED state.
idinor	0:dcf3c92487ca	1073	*
idinor	0:dcf3c92487ca	1074	* Returns:
idinor	0:dcf3c92487ca	1075	* 0 - Reject was bad.
idinor	0:dcf3c92487ca	1076	* 1 - Reject was good.
idinor	0:dcf3c92487ca	1077	*/
idinor	0:dcf3c92487ca	1078	static int
idinor	0:dcf3c92487ca	1079	lcp_rejci(fsm f, u_char p, int len)
idinor	0:dcf3c92487ca	1080	{
idinor	0:dcf3c92487ca	1081	lcp_options *go = &lcp_gotoptions[f->unit];
idinor	0:dcf3c92487ca	1082	u_char cichar;
idinor	0:dcf3c92487ca	1083	u_short cishort;
idinor	0:dcf3c92487ca	1084	u32_t cilong;
idinor	0:dcf3c92487ca	1085	lcp_options try; /* options to request next time */
idinor	0:dcf3c92487ca	1086
idinor	0:dcf3c92487ca	1087	try = *go;
idinor	0:dcf3c92487ca	1088
idinor	0:dcf3c92487ca	1089	/*
idinor	0:dcf3c92487ca	1090	* Any Rejected CIs must be in exactly the same order that we sent.
idinor	0:dcf3c92487ca	1091	* Check packet length and CI length at each step.
idinor	0:dcf3c92487ca	1092	* If we find any deviations, then this packet is bad.
idinor	0:dcf3c92487ca	1093	*/
idinor	0:dcf3c92487ca	1094	#define REJCIVOID(opt, neg) \
idinor	0:dcf3c92487ca	1095	if (go->neg && \
idinor	0:dcf3c92487ca	1096	len >= CILEN_VOID && \
idinor	0:dcf3c92487ca	1097	p[1] == CILEN_VOID && \
idinor	0:dcf3c92487ca	1098	p[0] == opt) { \
idinor	0:dcf3c92487ca	1099	len -= CILEN_VOID; \
idinor	0:dcf3c92487ca	1100	INCPTR(CILEN_VOID, p); \
idinor	0:dcf3c92487ca	1101	try.neg = 0; \
idinor	0:dcf3c92487ca	1102	LCPDEBUG(LOG_INFO, ("lcp_rejci: void opt %d rejected\n", opt)); \
idinor	0:dcf3c92487ca	1103	}
idinor	0:dcf3c92487ca	1104	#define REJCISHORT(opt, neg, val) \
idinor	0:dcf3c92487ca	1105	if (go->neg && \
idinor	0:dcf3c92487ca	1106	len >= CILEN_SHORT && \
idinor	0:dcf3c92487ca	1107	p[1] == CILEN_SHORT && \
idinor	0:dcf3c92487ca	1108	p[0] == opt) { \
idinor	0:dcf3c92487ca	1109	len -= CILEN_SHORT; \
idinor	0:dcf3c92487ca	1110	INCPTR(2, p); \
idinor	0:dcf3c92487ca	1111	GETSHORT(cishort, p); \
idinor	0:dcf3c92487ca	1112	/* Check rejected value. */ \
idinor	0:dcf3c92487ca	1113	if (cishort != val) { \
idinor	0:dcf3c92487ca	1114	goto bad; \
idinor	0:dcf3c92487ca	1115	} \
idinor	0:dcf3c92487ca	1116	try.neg = 0; \
idinor	0:dcf3c92487ca	1117	LCPDEBUG(LOG_INFO, ("lcp_rejci: short opt %d rejected\n", opt)); \
idinor	0:dcf3c92487ca	1118	}
idinor	0:dcf3c92487ca	1119	#define REJCICHAP(opt, neg, val, digest) \
idinor	0:dcf3c92487ca	1120	if (go->neg && \
idinor	0:dcf3c92487ca	1121	len >= CILEN_CHAP && \
idinor	0:dcf3c92487ca	1122	p[1] == CILEN_CHAP && \
idinor	0:dcf3c92487ca	1123	p[0] == opt) { \
idinor	0:dcf3c92487ca	1124	len -= CILEN_CHAP; \
idinor	0:dcf3c92487ca	1125	INCPTR(2, p); \
idinor	0:dcf3c92487ca	1126	GETSHORT(cishort, p); \
idinor	0:dcf3c92487ca	1127	GETCHAR(cichar, p); \
idinor	0:dcf3c92487ca	1128	/* Check rejected value. */ \
idinor	0:dcf3c92487ca	1129	if (cishort != val \|\| cichar != digest) { \
idinor	0:dcf3c92487ca	1130	goto bad; \
idinor	0:dcf3c92487ca	1131	} \
idinor	0:dcf3c92487ca	1132	try.neg = 0; \
idinor	0:dcf3c92487ca	1133	try.neg_upap = 0; \
idinor	0:dcf3c92487ca	1134	LCPDEBUG(LOG_INFO, ("lcp_rejci: chap opt %d rejected\n", opt)); \
idinor	0:dcf3c92487ca	1135	}
idinor	0:dcf3c92487ca	1136	#define REJCILONG(opt, neg, val) \
idinor	0:dcf3c92487ca	1137	if (go->neg && \
idinor	0:dcf3c92487ca	1138	len >= CILEN_LONG && \
idinor	0:dcf3c92487ca	1139	p[1] == CILEN_LONG && \
idinor	0:dcf3c92487ca	1140	p[0] == opt) { \
idinor	0:dcf3c92487ca	1141	len -= CILEN_LONG; \
idinor	0:dcf3c92487ca	1142	INCPTR(2, p); \
idinor	0:dcf3c92487ca	1143	GETLONG(cilong, p); \
idinor	0:dcf3c92487ca	1144	/* Check rejected value. */ \
idinor	0:dcf3c92487ca	1145	if (cilong != val) { \
idinor	0:dcf3c92487ca	1146	goto bad; \
idinor	0:dcf3c92487ca	1147	} \
idinor	0:dcf3c92487ca	1148	try.neg = 0; \
idinor	0:dcf3c92487ca	1149	LCPDEBUG(LOG_INFO, ("lcp_rejci: long opt %d rejected\n", opt)); \
idinor	0:dcf3c92487ca	1150	}
idinor	0:dcf3c92487ca	1151	#define REJCILQR(opt, neg, val) \
idinor	0:dcf3c92487ca	1152	if (go->neg && \
idinor	0:dcf3c92487ca	1153	len >= CILEN_LQR && \
idinor	0:dcf3c92487ca	1154	p[1] == CILEN_LQR && \
idinor	0:dcf3c92487ca	1155	p[0] == opt) { \
idinor	0:dcf3c92487ca	1156	len -= CILEN_LQR; \
idinor	0:dcf3c92487ca	1157	INCPTR(2, p); \
idinor	0:dcf3c92487ca	1158	GETSHORT(cishort, p); \
idinor	0:dcf3c92487ca	1159	GETLONG(cilong, p); \
idinor	0:dcf3c92487ca	1160	/* Check rejected value. */ \
idinor	0:dcf3c92487ca	1161	if (cishort != PPP_LQR \|\| cilong != val) { \
idinor	0:dcf3c92487ca	1162	goto bad; \
idinor	0:dcf3c92487ca	1163	} \
idinor	0:dcf3c92487ca	1164	try.neg = 0; \
idinor	0:dcf3c92487ca	1165	LCPDEBUG(LOG_INFO, ("lcp_rejci: LQR opt %d rejected\n", opt)); \
idinor	0:dcf3c92487ca	1166	}
idinor	0:dcf3c92487ca	1167	#define REJCICBCP(opt, neg, val) \
idinor	0:dcf3c92487ca	1168	if (go->neg && \
idinor	0:dcf3c92487ca	1169	len >= CILEN_CBCP && \
idinor	0:dcf3c92487ca	1170	p[1] == CILEN_CBCP && \
idinor	0:dcf3c92487ca	1171	p[0] == opt) { \
idinor	0:dcf3c92487ca	1172	len -= CILEN_CBCP; \
idinor	0:dcf3c92487ca	1173	INCPTR(2, p); \
idinor	0:dcf3c92487ca	1174	GETCHAR(cichar, p); \
idinor	0:dcf3c92487ca	1175	/* Check rejected value. */ \
idinor	0:dcf3c92487ca	1176	if (cichar != val) { \
idinor	0:dcf3c92487ca	1177	goto bad; \
idinor	0:dcf3c92487ca	1178	} \
idinor	0:dcf3c92487ca	1179	try.neg = 0; \
idinor	0:dcf3c92487ca	1180	LCPDEBUG(LOG_INFO, ("lcp_rejci: Callback opt %d rejected\n", opt)); \
idinor	0:dcf3c92487ca	1181	}
idinor	0:dcf3c92487ca	1182
idinor	0:dcf3c92487ca	1183	REJCISHORT(CI_MRU, neg_mru, go->mru);
idinor	0:dcf3c92487ca	1184	REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap);
idinor	0:dcf3c92487ca	1185	REJCICHAP(CI_AUTHTYPE, neg_chap, PPP_CHAP, go->chap_mdtype);
idinor	0:dcf3c92487ca	1186	if (!go->neg_chap) {
idinor	0:dcf3c92487ca	1187	REJCISHORT(CI_AUTHTYPE, neg_upap, PPP_PAP);
idinor	0:dcf3c92487ca	1188	}
idinor	0:dcf3c92487ca	1189	REJCILQR(CI_QUALITY, neg_lqr, go->lqr_period);
idinor	0:dcf3c92487ca	1190	REJCICBCP(CI_CALLBACK, neg_cbcp, CBCP_OPT);
idinor	0:dcf3c92487ca	1191	REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber);
idinor	0:dcf3c92487ca	1192	REJCIVOID(CI_PCOMPRESSION, neg_pcompression);
idinor	0:dcf3c92487ca	1193	REJCIVOID(CI_ACCOMPRESSION, neg_accompression);
idinor	0:dcf3c92487ca	1194
idinor	0:dcf3c92487ca	1195	/*
idinor	0:dcf3c92487ca	1196	* If there are any remaining CIs, then this packet is bad.
idinor	0:dcf3c92487ca	1197	*/
idinor	0:dcf3c92487ca	1198	if (len != 0) {
idinor	0:dcf3c92487ca	1199	goto bad;
idinor	0:dcf3c92487ca	1200	}
idinor	0:dcf3c92487ca	1201	/*
idinor	0:dcf3c92487ca	1202	* Now we can update state.
idinor	0:dcf3c92487ca	1203	*/
idinor	0:dcf3c92487ca	1204	if (f->state != LS_OPENED) {
idinor	0:dcf3c92487ca	1205	*go = try;
idinor	0:dcf3c92487ca	1206	}
idinor	0:dcf3c92487ca	1207	return 1;
idinor	0:dcf3c92487ca	1208
idinor	0:dcf3c92487ca	1209	bad:
idinor	0:dcf3c92487ca	1210	LCPDEBUG(LOG_WARNING, ("lcp_rejci: received bad Reject!\n"));
idinor	0:dcf3c92487ca	1211	return 0;
idinor	0:dcf3c92487ca	1212	}
idinor	0:dcf3c92487ca	1213
idinor	0:dcf3c92487ca	1214
idinor	0:dcf3c92487ca	1215	/*
idinor	0:dcf3c92487ca	1216	* lcp_reqci - Check the peer's requested CIs and send appropriate response.
idinor	0:dcf3c92487ca	1217	*
idinor	0:dcf3c92487ca	1218	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
idinor	0:dcf3c92487ca	1219	* appropriately. If reject_if_disagree is non-zero, doesn't return
idinor	0:dcf3c92487ca	1220	* CONFNAK; returns CONFREJ if it can't return CONFACK.
idinor	0:dcf3c92487ca	1221	*/
idinor	0:dcf3c92487ca	1222	static int
idinor	0:dcf3c92487ca	1223	lcp_reqci(fsm *f,
idinor	0:dcf3c92487ca	1224	u_char inp, / Requested CIs */
idinor	0:dcf3c92487ca	1225	int lenp, / Length of requested CIs */
idinor	0:dcf3c92487ca	1226	int reject_if_disagree)
idinor	0:dcf3c92487ca	1227	{
idinor	0:dcf3c92487ca	1228	lcp_options *go = &lcp_gotoptions[f->unit];
idinor	0:dcf3c92487ca	1229	lcp_options *ho = &lcp_hisoptions[f->unit];
idinor	0:dcf3c92487ca	1230	lcp_options *ao = &lcp_allowoptions[f->unit];
idinor	0:dcf3c92487ca	1231	u_char cip, next; /* Pointer to current and next CIs */
idinor	0:dcf3c92487ca	1232	int cilen, citype; /* Parsed len, type */
idinor	0:dcf3c92487ca	1233	u_char cichar; /* Parsed char value */
idinor	0:dcf3c92487ca	1234	u_short cishort; /* Parsed short value */
idinor	0:dcf3c92487ca	1235	u32_t cilong; /* Parse long value */
idinor	0:dcf3c92487ca	1236	int rc = CONFACK; /* Final packet return code */
idinor	0:dcf3c92487ca	1237	int orc; /* Individual option return code */
idinor	0:dcf3c92487ca	1238	u_char p; / Pointer to next char to parse */
idinor	0:dcf3c92487ca	1239	u_char rejp; / Pointer to next char in reject frame */
idinor	0:dcf3c92487ca	1240	u_char nakp; / Pointer to next char in Nak frame */
idinor	0:dcf3c92487ca	1241	int l = lenp; / Length left */
idinor	0:dcf3c92487ca	1242	#if TRACELCP > 0
idinor	0:dcf3c92487ca	1243	char traceBuf[80];
idinor	0:dcf3c92487ca	1244	size_t traceNdx = 0;
idinor	0:dcf3c92487ca	1245	#endif
idinor	0:dcf3c92487ca	1246
idinor	0:dcf3c92487ca	1247	/*
idinor	0:dcf3c92487ca	1248	* Reset all his options.
idinor	0:dcf3c92487ca	1249	*/
idinor	0:dcf3c92487ca	1250	BZERO(ho, sizeof(*ho));
idinor	0:dcf3c92487ca	1251
idinor	0:dcf3c92487ca	1252	/*
idinor	0:dcf3c92487ca	1253	* Process all his options.
idinor	0:dcf3c92487ca	1254	*/
idinor	0:dcf3c92487ca	1255	next = inp;
idinor	0:dcf3c92487ca	1256	nakp = nak_buffer;
idinor	0:dcf3c92487ca	1257	rejp = inp;
idinor	0:dcf3c92487ca	1258	while (l) {
idinor	0:dcf3c92487ca	1259	orc = CONFACK; /* Assume success */
idinor	0:dcf3c92487ca	1260	cip = p = next; /* Remember begining of CI */
idinor	0:dcf3c92487ca	1261	if (l < 2 \|\| /* Not enough data for CI header or */
idinor	0:dcf3c92487ca	1262	p[1] < 2 \|\| /* CI length too small or */
idinor	0:dcf3c92487ca	1263	p[1] > l) { /* CI length too big? */
idinor	0:dcf3c92487ca	1264	LCPDEBUG(LOG_WARNING, ("lcp_reqci: bad CI length!\n"));
idinor	0:dcf3c92487ca	1265	orc = CONFREJ; /* Reject bad CI */
idinor	0:dcf3c92487ca	1266	cilen = l; /* Reject till end of packet */
idinor	0:dcf3c92487ca	1267	l = 0; /* Don't loop again */
idinor	0:dcf3c92487ca	1268	citype = 0;
idinor	0:dcf3c92487ca	1269	goto endswitch;
idinor	0:dcf3c92487ca	1270	}
idinor	0:dcf3c92487ca	1271	GETCHAR(citype, p); /* Parse CI type */
idinor	0:dcf3c92487ca	1272	GETCHAR(cilen, p); /* Parse CI length */
idinor	0:dcf3c92487ca	1273	l -= cilen; /* Adjust remaining length */
idinor	0:dcf3c92487ca	1274	next += cilen; /* Step to next CI */
idinor	0:dcf3c92487ca	1275
idinor	0:dcf3c92487ca	1276	switch (citype) { /* Check CI type */
idinor	0:dcf3c92487ca	1277	case CI_MRU:
idinor	0:dcf3c92487ca	1278	if (!ao->neg_mru) { /* Allow option? */
idinor	0:dcf3c92487ca	1279	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - not allowed\n"));
idinor	0:dcf3c92487ca	1280	orc = CONFREJ; /* Reject CI */
idinor	0:dcf3c92487ca	1281	break;
idinor	0:dcf3c92487ca	1282	} else if (cilen != CILEN_SHORT) { /* Check CI length */
idinor	0:dcf3c92487ca	1283	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - bad length\n"));
idinor	0:dcf3c92487ca	1284	orc = CONFREJ; /* Reject CI */
idinor	0:dcf3c92487ca	1285	break;
idinor	0:dcf3c92487ca	1286	}
idinor	0:dcf3c92487ca	1287	GETSHORT(cishort, p); /* Parse MRU */
idinor	0:dcf3c92487ca	1288
idinor	0:dcf3c92487ca	1289	/*
idinor	0:dcf3c92487ca	1290	* He must be able to receive at least our minimum.
idinor	0:dcf3c92487ca	1291	* No need to check a maximum. If he sends a large number,
idinor	0:dcf3c92487ca	1292	* we'll just ignore it.
idinor	0:dcf3c92487ca	1293	*/
idinor	0:dcf3c92487ca	1294	if (cishort < PPP_MINMRU) {
idinor	0:dcf3c92487ca	1295	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak - MRU too small\n"));
idinor	0:dcf3c92487ca	1296	orc = CONFNAK; /* Nak CI */
idinor	0:dcf3c92487ca	1297	PUTCHAR(CI_MRU, nakp);
idinor	0:dcf3c92487ca	1298	PUTCHAR(CILEN_SHORT, nakp);
idinor	0:dcf3c92487ca	1299	PUTSHORT(PPP_MINMRU, nakp); /* Give him a hint */
idinor	0:dcf3c92487ca	1300	break;
idinor	0:dcf3c92487ca	1301	}
idinor	0:dcf3c92487ca	1302	ho->neg_mru = 1; /* Remember he sent MRU */
idinor	0:dcf3c92487ca	1303	ho->mru = cishort; /* And remember value */
idinor	0:dcf3c92487ca	1304	#if TRACELCP > 0
idinor	0:dcf3c92487ca	1305	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MRU %d", cishort);
idinor	0:dcf3c92487ca	1306	traceNdx = strlen(traceBuf);
idinor	0:dcf3c92487ca	1307	#endif
idinor	0:dcf3c92487ca	1308	break;
idinor	0:dcf3c92487ca	1309
idinor	0:dcf3c92487ca	1310	case CI_ASYNCMAP:
idinor	0:dcf3c92487ca	1311	if (!ao->neg_asyncmap) {
idinor	0:dcf3c92487ca	1312	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP not allowed\n"));
idinor	0:dcf3c92487ca	1313	orc = CONFREJ;
idinor	0:dcf3c92487ca	1314	break;
idinor	0:dcf3c92487ca	1315	} else if (cilen != CILEN_LONG) {
idinor	0:dcf3c92487ca	1316	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP bad length\n"));
idinor	0:dcf3c92487ca	1317	orc = CONFREJ;
idinor	0:dcf3c92487ca	1318	break;
idinor	0:dcf3c92487ca	1319	}
idinor	0:dcf3c92487ca	1320	GETLONG(cilong, p);
idinor	0:dcf3c92487ca	1321
idinor	0:dcf3c92487ca	1322	/*
idinor	0:dcf3c92487ca	1323	* Asyncmap must have set at least the bits
idinor	0:dcf3c92487ca	1324	* which are set in lcp_allowoptions[unit].asyncmap.
idinor	0:dcf3c92487ca	1325	*/
idinor	0:dcf3c92487ca	1326	if ((ao->asyncmap & ~cilong) != 0) {
idinor	0:dcf3c92487ca	1327	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak ASYNCMAP %lX missing %lX\n",
idinor	0:dcf3c92487ca	1328	cilong, ao->asyncmap));
idinor	0:dcf3c92487ca	1329	orc = CONFNAK;
idinor	0:dcf3c92487ca	1330	PUTCHAR(CI_ASYNCMAP, nakp);
idinor	0:dcf3c92487ca	1331	PUTCHAR(CILEN_LONG, nakp);
idinor	0:dcf3c92487ca	1332	PUTLONG(ao->asyncmap \| cilong, nakp);
idinor	0:dcf3c92487ca	1333	break;
idinor	0:dcf3c92487ca	1334	}
idinor	0:dcf3c92487ca	1335	ho->neg_asyncmap = 1;
idinor	0:dcf3c92487ca	1336	ho->asyncmap = cilong;
idinor	0:dcf3c92487ca	1337	#if TRACELCP > 0
idinor	0:dcf3c92487ca	1338	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ASYNCMAP=%lX", cilong);
idinor	0:dcf3c92487ca	1339	traceNdx = strlen(traceBuf);
idinor	0:dcf3c92487ca	1340	#endif
idinor	0:dcf3c92487ca	1341	break;
idinor	0:dcf3c92487ca	1342
idinor	0:dcf3c92487ca	1343	case CI_AUTHTYPE:
idinor	0:dcf3c92487ca	1344	if (cilen < CILEN_SHORT) {
idinor	0:dcf3c92487ca	1345	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE missing arg\n"));
idinor	0:dcf3c92487ca	1346	orc = CONFREJ;
idinor	0:dcf3c92487ca	1347	break;
idinor	0:dcf3c92487ca	1348	} else if (!(ao->neg_upap \|\| ao->neg_chap)) {
idinor	0:dcf3c92487ca	1349	/*
idinor	0:dcf3c92487ca	1350	* Reject the option if we're not willing to authenticate.
idinor	0:dcf3c92487ca	1351	*/
idinor	0:dcf3c92487ca	1352	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE not allowed\n"));
idinor	0:dcf3c92487ca	1353	orc = CONFREJ;
idinor	0:dcf3c92487ca	1354	break;
idinor	0:dcf3c92487ca	1355	}
idinor	0:dcf3c92487ca	1356	GETSHORT(cishort, p);
idinor	0:dcf3c92487ca	1357
idinor	0:dcf3c92487ca	1358	/*
idinor	0:dcf3c92487ca	1359	* Authtype must be UPAP or CHAP.
idinor	0:dcf3c92487ca	1360	*
idinor	0:dcf3c92487ca	1361	* Note: if both ao->neg_upap and ao->neg_chap are set,
idinor	0:dcf3c92487ca	1362	* and the peer sends a Configure-Request with two
idinor	0:dcf3c92487ca	1363	* authenticate-protocol requests, one for CHAP and one
idinor	0:dcf3c92487ca	1364	* for UPAP, then we will reject the second request.
idinor	0:dcf3c92487ca	1365	* Whether we end up doing CHAP or UPAP depends then on
idinor	0:dcf3c92487ca	1366	* the ordering of the CIs in the peer's Configure-Request.
idinor	0:dcf3c92487ca	1367	*/
idinor	0:dcf3c92487ca	1368
idinor	0:dcf3c92487ca	1369	if (cishort == PPP_PAP) {
idinor	0:dcf3c92487ca	1370	if (ho->neg_chap) { /* we've already accepted CHAP */
idinor	0:dcf3c92487ca	1371	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP already accepted\n"));
idinor	0:dcf3c92487ca	1372	orc = CONFREJ;
idinor	0:dcf3c92487ca	1373	break;
idinor	0:dcf3c92487ca	1374	} else if (cilen != CILEN_SHORT) {
idinor	0:dcf3c92487ca	1375	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP bad len\n"));
idinor	0:dcf3c92487ca	1376	orc = CONFREJ;
idinor	0:dcf3c92487ca	1377	break;
idinor	0:dcf3c92487ca	1378	}
idinor	0:dcf3c92487ca	1379	if (!ao->neg_upap) { /* we don't want to do PAP */
idinor	0:dcf3c92487ca	1380	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE PAP not allowed\n"));
idinor	0:dcf3c92487ca	1381	orc = CONFNAK; /* NAK it and suggest CHAP */
idinor	0:dcf3c92487ca	1382	PUTCHAR(CI_AUTHTYPE, nakp);
idinor	0:dcf3c92487ca	1383	PUTCHAR(CILEN_CHAP, nakp);
idinor	0:dcf3c92487ca	1384	PUTSHORT(PPP_CHAP, nakp);
idinor	0:dcf3c92487ca	1385	PUTCHAR(ao->chap_mdtype, nakp);
idinor	0:dcf3c92487ca	1386	break;
idinor	0:dcf3c92487ca	1387	}
idinor	0:dcf3c92487ca	1388	ho->neg_upap = 1;
idinor	0:dcf3c92487ca	1389	#if TRACELCP > 0
idinor	0:dcf3c92487ca	1390	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PAP (%X)", cishort);
idinor	0:dcf3c92487ca	1391	traceNdx = strlen(traceBuf);
idinor	0:dcf3c92487ca	1392	#endif
idinor	0:dcf3c92487ca	1393	break;
idinor	0:dcf3c92487ca	1394	}
idinor	0:dcf3c92487ca	1395	if (cishort == PPP_CHAP) {
idinor	0:dcf3c92487ca	1396	if (ho->neg_upap) { /* we've already accepted PAP */
idinor	0:dcf3c92487ca	1397	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP accepted PAP\n"));
idinor	0:dcf3c92487ca	1398	orc = CONFREJ;
idinor	0:dcf3c92487ca	1399	break;
idinor	0:dcf3c92487ca	1400	} else if (cilen != CILEN_CHAP) {
idinor	0:dcf3c92487ca	1401	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP bad len\n"));
idinor	0:dcf3c92487ca	1402	orc = CONFREJ;
idinor	0:dcf3c92487ca	1403	break;
idinor	0:dcf3c92487ca	1404	}
idinor	0:dcf3c92487ca	1405	if (!ao->neg_chap) { /* we don't want to do CHAP */
idinor	0:dcf3c92487ca	1406	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP not allowed\n"));
idinor	0:dcf3c92487ca	1407	orc = CONFNAK; /* NAK it and suggest PAP */
idinor	0:dcf3c92487ca	1408	PUTCHAR(CI_AUTHTYPE, nakp);
idinor	0:dcf3c92487ca	1409	PUTCHAR(CILEN_SHORT, nakp);
idinor	0:dcf3c92487ca	1410	PUTSHORT(PPP_PAP, nakp);
idinor	0:dcf3c92487ca	1411	break;
idinor	0:dcf3c92487ca	1412	}
idinor	0:dcf3c92487ca	1413	GETCHAR(cichar, p); /* get digest type*/
idinor	0:dcf3c92487ca	1414	if (cichar != CHAP_DIGEST_MD5
idinor	0:dcf3c92487ca	1415	#if MSCHAP_SUPPORT
idinor	0:dcf3c92487ca	1416	&& cichar != CHAP_MICROSOFT
idinor	0:dcf3c92487ca	1417	#endif
idinor	0:dcf3c92487ca	1418	) {
idinor	0:dcf3c92487ca	1419	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP digest=%d\n", (int)cichar));
idinor	0:dcf3c92487ca	1420	orc = CONFNAK;
idinor	0:dcf3c92487ca	1421	PUTCHAR(CI_AUTHTYPE, nakp);
idinor	0:dcf3c92487ca	1422	PUTCHAR(CILEN_CHAP, nakp);
idinor	0:dcf3c92487ca	1423	PUTSHORT(PPP_CHAP, nakp);
idinor	0:dcf3c92487ca	1424	PUTCHAR(ao->chap_mdtype, nakp);
idinor	0:dcf3c92487ca	1425	break;
idinor	0:dcf3c92487ca	1426	}
idinor	0:dcf3c92487ca	1427	#if TRACELCP > 0
idinor	0:dcf3c92487ca	1428	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CHAP %X,%d", cishort, (int)cichar);
idinor	0:dcf3c92487ca	1429	traceNdx = strlen(traceBuf);
idinor	0:dcf3c92487ca	1430	#endif
idinor	0:dcf3c92487ca	1431	ho->chap_mdtype = cichar; /* save md type */
idinor	0:dcf3c92487ca	1432	ho->neg_chap = 1;
idinor	0:dcf3c92487ca	1433	break;
idinor	0:dcf3c92487ca	1434	}
idinor	0:dcf3c92487ca	1435
idinor	0:dcf3c92487ca	1436	/*
idinor	0:dcf3c92487ca	1437	* We don't recognize the protocol they're asking for.
idinor	0:dcf3c92487ca	1438	* Nak it with something we're willing to do.
idinor	0:dcf3c92487ca	1439	* (At this point we know ao->neg_upap \|\| ao->neg_chap.)
idinor	0:dcf3c92487ca	1440	*/
idinor	0:dcf3c92487ca	1441	orc = CONFNAK;
idinor	0:dcf3c92487ca	1442	PUTCHAR(CI_AUTHTYPE, nakp);
idinor	0:dcf3c92487ca	1443	if (ao->neg_chap) {
idinor	0:dcf3c92487ca	1444	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req CHAP\n", cishort));
idinor	0:dcf3c92487ca	1445	PUTCHAR(CILEN_CHAP, nakp);
idinor	0:dcf3c92487ca	1446	PUTSHORT(PPP_CHAP, nakp);
idinor	0:dcf3c92487ca	1447	PUTCHAR(ao->chap_mdtype, nakp);
idinor	0:dcf3c92487ca	1448	} else {
idinor	0:dcf3c92487ca	1449	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req PAP\n", cishort));
idinor	0:dcf3c92487ca	1450	PUTCHAR(CILEN_SHORT, nakp);
idinor	0:dcf3c92487ca	1451	PUTSHORT(PPP_PAP, nakp);
idinor	0:dcf3c92487ca	1452	}
idinor	0:dcf3c92487ca	1453	break;
idinor	0:dcf3c92487ca	1454
idinor	0:dcf3c92487ca	1455	case CI_QUALITY:
idinor	0:dcf3c92487ca	1456	GETSHORT(cishort, p);
idinor	0:dcf3c92487ca	1457	GETLONG(cilong, p);
idinor	0:dcf3c92487ca	1458	#if TRACELCP > 0
idinor	0:dcf3c92487ca	1459	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " QUALITY (%x %x)", cishort, (unsigned int) cilong);
idinor	0:dcf3c92487ca	1460	traceNdx = strlen(traceBuf);
idinor	0:dcf3c92487ca	1461	#endif
idinor	0:dcf3c92487ca	1462
idinor	0:dcf3c92487ca	1463	if (!ao->neg_lqr \|\|
idinor	0:dcf3c92487ca	1464	cilen != CILEN_LQR) {
idinor	0:dcf3c92487ca	1465	orc = CONFREJ;
idinor	0:dcf3c92487ca	1466	break;
idinor	0:dcf3c92487ca	1467	}
idinor	0:dcf3c92487ca	1468
idinor	0:dcf3c92487ca	1469	/*
idinor	0:dcf3c92487ca	1470	* Check the protocol and the reporting period.
idinor	0:dcf3c92487ca	1471	* XXX When should we Nak this, and what with?
idinor	0:dcf3c92487ca	1472	*/
idinor	0:dcf3c92487ca	1473	if (cishort != PPP_LQR) {
idinor	0:dcf3c92487ca	1474	orc = CONFNAK;
idinor	0:dcf3c92487ca	1475	PUTCHAR(CI_QUALITY, nakp);
idinor	0:dcf3c92487ca	1476	PUTCHAR(CILEN_LQR, nakp);
idinor	0:dcf3c92487ca	1477	PUTSHORT(PPP_LQR, nakp);
idinor	0:dcf3c92487ca	1478	PUTLONG(ao->lqr_period, nakp);
idinor	0:dcf3c92487ca	1479	break;
idinor	0:dcf3c92487ca	1480	}
idinor	0:dcf3c92487ca	1481	break;
idinor	0:dcf3c92487ca	1482
idinor	0:dcf3c92487ca	1483	case CI_MAGICNUMBER:
idinor	0:dcf3c92487ca	1484	if (!(ao->neg_magicnumber \|\| go->neg_magicnumber) \|\|
idinor	0:dcf3c92487ca	1485	cilen != CILEN_LONG) {
idinor	0:dcf3c92487ca	1486	orc = CONFREJ;
idinor	0:dcf3c92487ca	1487	break;
idinor	0:dcf3c92487ca	1488	}
idinor	0:dcf3c92487ca	1489	GETLONG(cilong, p);
idinor	0:dcf3c92487ca	1490	#if TRACELCP > 0
idinor	0:dcf3c92487ca	1491	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MAGICNUMBER (%lX)", cilong);
idinor	0:dcf3c92487ca	1492	traceNdx = strlen(traceBuf);
idinor	0:dcf3c92487ca	1493	#endif
idinor	0:dcf3c92487ca	1494
idinor	0:dcf3c92487ca	1495	/*
idinor	0:dcf3c92487ca	1496	* He must have a different magic number.
idinor	0:dcf3c92487ca	1497	*/
idinor	0:dcf3c92487ca	1498	if (go->neg_magicnumber &&
idinor	0:dcf3c92487ca	1499	cilong == go->magicnumber) {
idinor	0:dcf3c92487ca	1500	cilong = magic(); /* Don't put magic() inside macro! */
idinor	0:dcf3c92487ca	1501	orc = CONFNAK;
idinor	0:dcf3c92487ca	1502	PUTCHAR(CI_MAGICNUMBER, nakp);
idinor	0:dcf3c92487ca	1503	PUTCHAR(CILEN_LONG, nakp);
idinor	0:dcf3c92487ca	1504	PUTLONG(cilong, nakp);
idinor	0:dcf3c92487ca	1505	break;
idinor	0:dcf3c92487ca	1506	}
idinor	0:dcf3c92487ca	1507	ho->neg_magicnumber = 1;
idinor	0:dcf3c92487ca	1508	ho->magicnumber = cilong;
idinor	0:dcf3c92487ca	1509	break;
idinor	0:dcf3c92487ca	1510
idinor	0:dcf3c92487ca	1511
idinor	0:dcf3c92487ca	1512	case CI_PCOMPRESSION:
idinor	0:dcf3c92487ca	1513	#if TRACELCP > 0
idinor	0:dcf3c92487ca	1514	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PCOMPRESSION");
idinor	0:dcf3c92487ca	1515	traceNdx = strlen(traceBuf);
idinor	0:dcf3c92487ca	1516	#endif
idinor	0:dcf3c92487ca	1517	if (!ao->neg_pcompression \|\|
idinor	0:dcf3c92487ca	1518	cilen != CILEN_VOID) {
idinor	0:dcf3c92487ca	1519	orc = CONFREJ;
idinor	0:dcf3c92487ca	1520	break;
idinor	0:dcf3c92487ca	1521	}
idinor	0:dcf3c92487ca	1522	ho->neg_pcompression = 1;
idinor	0:dcf3c92487ca	1523	break;
idinor	0:dcf3c92487ca	1524
idinor	0:dcf3c92487ca	1525	case CI_ACCOMPRESSION:
idinor	0:dcf3c92487ca	1526	#if TRACELCP > 0
idinor	0:dcf3c92487ca	1527	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ACCOMPRESSION");
idinor	0:dcf3c92487ca	1528	traceNdx = strlen(traceBuf);
idinor	0:dcf3c92487ca	1529	#endif
idinor	0:dcf3c92487ca	1530	if (!ao->neg_accompression \|\|
idinor	0:dcf3c92487ca	1531	cilen != CILEN_VOID) {
idinor	0:dcf3c92487ca	1532	orc = CONFREJ;
idinor	0:dcf3c92487ca	1533	break;
idinor	0:dcf3c92487ca	1534	}
idinor	0:dcf3c92487ca	1535	ho->neg_accompression = 1;
idinor	0:dcf3c92487ca	1536	break;
idinor	0:dcf3c92487ca	1537
idinor	0:dcf3c92487ca	1538	case CI_MRRU:
idinor	0:dcf3c92487ca	1539	#if TRACELCP > 0
idinor	0:dcf3c92487ca	1540	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_MRRU");
idinor	0:dcf3c92487ca	1541	traceNdx = strlen(traceBuf);
idinor	0:dcf3c92487ca	1542	#endif
idinor	0:dcf3c92487ca	1543	orc = CONFREJ;
idinor	0:dcf3c92487ca	1544	break;
idinor	0:dcf3c92487ca	1545
idinor	0:dcf3c92487ca	1546	case CI_SSNHF:
idinor	0:dcf3c92487ca	1547	#if TRACELCP > 0
idinor	0:dcf3c92487ca	1548	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_SSNHF");
idinor	0:dcf3c92487ca	1549	traceNdx = strlen(traceBuf);
idinor	0:dcf3c92487ca	1550	#endif
idinor	0:dcf3c92487ca	1551	orc = CONFREJ;
idinor	0:dcf3c92487ca	1552	break;
idinor	0:dcf3c92487ca	1553
idinor	0:dcf3c92487ca	1554	case CI_EPDISC:
idinor	0:dcf3c92487ca	1555	#if TRACELCP > 0
idinor	0:dcf3c92487ca	1556	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_EPDISC");
idinor	0:dcf3c92487ca	1557	traceNdx = strlen(traceBuf);
idinor	0:dcf3c92487ca	1558	#endif
idinor	0:dcf3c92487ca	1559	orc = CONFREJ;
idinor	0:dcf3c92487ca	1560	break;
idinor	0:dcf3c92487ca	1561
idinor	0:dcf3c92487ca	1562	default:
idinor	0:dcf3c92487ca	1563	#if TRACELCP
idinor	0:dcf3c92487ca	1564	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " unknown %d", citype);
idinor	0:dcf3c92487ca	1565	traceNdx = strlen(traceBuf);
idinor	0:dcf3c92487ca	1566	#endif
idinor	0:dcf3c92487ca	1567	orc = CONFREJ;
idinor	0:dcf3c92487ca	1568	break;
idinor	0:dcf3c92487ca	1569	}
idinor	0:dcf3c92487ca	1570
idinor	0:dcf3c92487ca	1571	endswitch:
idinor	0:dcf3c92487ca	1572	#if TRACELCP
idinor	0:dcf3c92487ca	1573	if (traceNdx >= 80 - 32) {
idinor	0:dcf3c92487ca	1574	LCPDEBUG(LOG_INFO, ("lcp_reqci: rcvd%s\n", traceBuf));
idinor	0:dcf3c92487ca	1575	traceNdx = 0;
idinor	0:dcf3c92487ca	1576	}
idinor	0:dcf3c92487ca	1577	#endif
idinor	0:dcf3c92487ca	1578	if (orc == CONFACK && /* Good CI */
idinor	0:dcf3c92487ca	1579	rc != CONFACK) { /* but prior CI wasnt? */
idinor	0:dcf3c92487ca	1580	continue; /* Don't send this one */
idinor	0:dcf3c92487ca	1581	}
idinor	0:dcf3c92487ca	1582
idinor	0:dcf3c92487ca	1583	if (orc == CONFNAK) { /* Nak this CI? */
idinor	0:dcf3c92487ca	1584	if (reject_if_disagree /* Getting fed up with sending NAKs? */
idinor	0:dcf3c92487ca	1585	&& citype != CI_MAGICNUMBER) {
idinor	0:dcf3c92487ca	1586	orc = CONFREJ; /* Get tough if so */
idinor	0:dcf3c92487ca	1587	} else {
idinor	0:dcf3c92487ca	1588	if (rc == CONFREJ) { /* Rejecting prior CI? */
idinor	0:dcf3c92487ca	1589	continue; /* Don't send this one */
idinor	0:dcf3c92487ca	1590	}
idinor	0:dcf3c92487ca	1591	rc = CONFNAK;
idinor	0:dcf3c92487ca	1592	}
idinor	0:dcf3c92487ca	1593	}
idinor	0:dcf3c92487ca	1594	if (orc == CONFREJ) { /* Reject this CI */
idinor	0:dcf3c92487ca	1595	rc = CONFREJ;
idinor	0:dcf3c92487ca	1596	if (cip != rejp) { /* Need to move rejected CI? */
idinor	0:dcf3c92487ca	1597	BCOPY(cip, rejp, cilen); /* Move it */
idinor	0:dcf3c92487ca	1598	}
idinor	0:dcf3c92487ca	1599	INCPTR(cilen, rejp); /* Update output pointer */
idinor	0:dcf3c92487ca	1600	}
idinor	0:dcf3c92487ca	1601	}
idinor	0:dcf3c92487ca	1602
idinor	0:dcf3c92487ca	1603	/*
idinor	0:dcf3c92487ca	1604	* If we wanted to send additional NAKs (for unsent CIs), the
idinor	0:dcf3c92487ca	1605	* code would go here. The extra NAKs would go at *nakp.
idinor	0:dcf3c92487ca	1606	* At present there are no cases where we want to ask the
idinor	0:dcf3c92487ca	1607	* peer to negotiate an option.
idinor	0:dcf3c92487ca	1608	*/
idinor	0:dcf3c92487ca	1609
idinor	0:dcf3c92487ca	1610	switch (rc) {
idinor	0:dcf3c92487ca	1611	case CONFACK:
idinor	0:dcf3c92487ca	1612	*lenp = (int)(next - inp);
idinor	0:dcf3c92487ca	1613	break;
idinor	0:dcf3c92487ca	1614	case CONFNAK:
idinor	0:dcf3c92487ca	1615	/*
idinor	0:dcf3c92487ca	1616	* Copy the Nak'd options from the nak_buffer to the caller's buffer.
idinor	0:dcf3c92487ca	1617	*/
idinor	0:dcf3c92487ca	1618	*lenp = (int)(nakp - nak_buffer);
idinor	0:dcf3c92487ca	1619	BCOPY(nak_buffer, inp, *lenp);
idinor	0:dcf3c92487ca	1620	break;
idinor	0:dcf3c92487ca	1621	case CONFREJ:
idinor	0:dcf3c92487ca	1622	*lenp = (int)(rejp - inp);
idinor	0:dcf3c92487ca	1623	break;
idinor	0:dcf3c92487ca	1624	}
idinor	0:dcf3c92487ca	1625
idinor	0:dcf3c92487ca	1626	#if TRACELCP > 0
idinor	0:dcf3c92487ca	1627	if (traceNdx > 0) {
idinor	0:dcf3c92487ca	1628	LCPDEBUG(LOG_INFO, ("lcp_reqci: %s\n", traceBuf));
idinor	0:dcf3c92487ca	1629	}
idinor	0:dcf3c92487ca	1630	#endif
idinor	0:dcf3c92487ca	1631	LCPDEBUG(LOG_INFO, ("lcp_reqci: returning CONF%s.\n", CODENAME(rc)));
idinor	0:dcf3c92487ca	1632	return (rc); /* Return final code */
idinor	0:dcf3c92487ca	1633	}
idinor	0:dcf3c92487ca	1634
idinor	0:dcf3c92487ca	1635
idinor	0:dcf3c92487ca	1636	/*
idinor	0:dcf3c92487ca	1637	* lcp_up - LCP has come UP.
idinor	0:dcf3c92487ca	1638	*/
idinor	0:dcf3c92487ca	1639	static void
idinor	0:dcf3c92487ca	1640	lcp_up(fsm *f)
idinor	0:dcf3c92487ca	1641	{
idinor	0:dcf3c92487ca	1642	lcp_options *wo = &lcp_wantoptions[f->unit];
idinor	0:dcf3c92487ca	1643	lcp_options *ho = &lcp_hisoptions[f->unit];
idinor	0:dcf3c92487ca	1644	lcp_options *go = &lcp_gotoptions[f->unit];
idinor	0:dcf3c92487ca	1645	lcp_options *ao = &lcp_allowoptions[f->unit];
idinor	0:dcf3c92487ca	1646
idinor	0:dcf3c92487ca	1647	if (!go->neg_magicnumber) {
idinor	0:dcf3c92487ca	1648	go->magicnumber = 0;
idinor	0:dcf3c92487ca	1649	}
idinor	0:dcf3c92487ca	1650	if (!ho->neg_magicnumber) {
idinor	0:dcf3c92487ca	1651	ho->magicnumber = 0;
idinor	0:dcf3c92487ca	1652	}
idinor	0:dcf3c92487ca	1653
idinor	0:dcf3c92487ca	1654	/*
idinor	0:dcf3c92487ca	1655	* Set our MTU to the smaller of the MTU we wanted and
idinor	0:dcf3c92487ca	1656	* the MRU our peer wanted. If we negotiated an MRU,
idinor	0:dcf3c92487ca	1657	* set our MRU to the larger of value we wanted and
idinor	0:dcf3c92487ca	1658	* the value we got in the negotiation.
idinor	0:dcf3c92487ca	1659	*/
idinor	0:dcf3c92487ca	1660	ppp_send_config(f->unit, LWIP_MIN(ao->mru, (ho->neg_mru? ho->mru: PPP_MRU)),
idinor	0:dcf3c92487ca	1661	(ho->neg_asyncmap? ho->asyncmap: 0xffffffffl),
idinor	0:dcf3c92487ca	1662	ho->neg_pcompression, ho->neg_accompression);
idinor	0:dcf3c92487ca	1663	/*
idinor	0:dcf3c92487ca	1664	* If the asyncmap hasn't been negotiated, we really should
idinor	0:dcf3c92487ca	1665	* set the receive asyncmap to ffffffff, but we set it to 0
idinor	0:dcf3c92487ca	1666	* for backwards contemptibility.
idinor	0:dcf3c92487ca	1667	*/
idinor	0:dcf3c92487ca	1668	ppp_recv_config(f->unit, (go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU),
idinor	0:dcf3c92487ca	1669	(go->neg_asyncmap? go->asyncmap: 0x00000000),
idinor	0:dcf3c92487ca	1670	go->neg_pcompression, go->neg_accompression);
idinor	0:dcf3c92487ca	1671
idinor	0:dcf3c92487ca	1672	if (ho->neg_mru) {
idinor	0:dcf3c92487ca	1673	peer_mru[f->unit] = ho->mru;
idinor	0:dcf3c92487ca	1674	}
idinor	0:dcf3c92487ca	1675
idinor	0:dcf3c92487ca	1676	lcp_echo_lowerup(f->unit); /* Enable echo messages */
idinor	0:dcf3c92487ca	1677
idinor	0:dcf3c92487ca	1678	link_established(f->unit); /* The link is up; authenticate now */
idinor	0:dcf3c92487ca	1679	}
idinor	0:dcf3c92487ca	1680
idinor	0:dcf3c92487ca	1681
idinor	0:dcf3c92487ca	1682	/*
idinor	0:dcf3c92487ca	1683	* lcp_down - LCP has gone DOWN.
idinor	0:dcf3c92487ca	1684	*
idinor	0:dcf3c92487ca	1685	* Alert other protocols.
idinor	0:dcf3c92487ca	1686	*/
idinor	0:dcf3c92487ca	1687	static void
idinor	0:dcf3c92487ca	1688	lcp_down(fsm *f)
idinor	0:dcf3c92487ca	1689	{
idinor	0:dcf3c92487ca	1690	lcp_options *go = &lcp_gotoptions[f->unit];
idinor	0:dcf3c92487ca	1691
idinor	0:dcf3c92487ca	1692	lcp_echo_lowerdown(f->unit);
idinor	0:dcf3c92487ca	1693
idinor	0:dcf3c92487ca	1694	link_down(f->unit);
idinor	0:dcf3c92487ca	1695
idinor	0:dcf3c92487ca	1696	ppp_send_config(f->unit, PPP_MRU, 0xffffffffl, 0, 0);
idinor	0:dcf3c92487ca	1697	ppp_recv_config(f->unit, PPP_MRU,
idinor	0:dcf3c92487ca	1698	(go->neg_asyncmap? go->asyncmap: 0x00000000),
idinor	0:dcf3c92487ca	1699	go->neg_pcompression, go->neg_accompression);
idinor	0:dcf3c92487ca	1700	peer_mru[f->unit] = PPP_MRU;
idinor	0:dcf3c92487ca	1701	}
idinor	0:dcf3c92487ca	1702
idinor	0:dcf3c92487ca	1703
idinor	0:dcf3c92487ca	1704	/*
idinor	0:dcf3c92487ca	1705	* lcp_starting - LCP needs the lower layer up.
idinor	0:dcf3c92487ca	1706	*/
idinor	0:dcf3c92487ca	1707	static void
idinor	0:dcf3c92487ca	1708	lcp_starting(fsm *f)
idinor	0:dcf3c92487ca	1709	{
idinor	0:dcf3c92487ca	1710	link_required(f->unit); /* lwip: currently does nothing */
idinor	0:dcf3c92487ca	1711	}
idinor	0:dcf3c92487ca	1712
idinor	0:dcf3c92487ca	1713
idinor	0:dcf3c92487ca	1714	/*
idinor	0:dcf3c92487ca	1715	* lcp_finished - LCP has finished with the lower layer.
idinor	0:dcf3c92487ca	1716	*/
idinor	0:dcf3c92487ca	1717	static void
idinor	0:dcf3c92487ca	1718	lcp_finished(fsm *f)
idinor	0:dcf3c92487ca	1719	{
idinor	0:dcf3c92487ca	1720	link_terminated(f->unit); /* we are finished with the link */
idinor	0:dcf3c92487ca	1721	}
idinor	0:dcf3c92487ca	1722
idinor	0:dcf3c92487ca	1723
idinor	0:dcf3c92487ca	1724	#if PPP_ADDITIONAL_CALLBACKS
idinor	0:dcf3c92487ca	1725	/*
idinor	0:dcf3c92487ca	1726	* print_string - print a readable representation of a string using
idinor	0:dcf3c92487ca	1727	* printer.
idinor	0:dcf3c92487ca	1728	*/
idinor	0:dcf3c92487ca	1729	static void
idinor	0:dcf3c92487ca	1730	print_string( char p, int len, void (printer) (void , char , ...), void *arg)
idinor	0:dcf3c92487ca	1731	{
idinor	0:dcf3c92487ca	1732	int c;
idinor	0:dcf3c92487ca	1733
idinor	0:dcf3c92487ca	1734	printer(arg, "\"");
idinor	0:dcf3c92487ca	1735	for (; len > 0; --len) {
idinor	0:dcf3c92487ca	1736	c = *p++;
idinor	0:dcf3c92487ca	1737	if (' ' <= c && c <= '~') {
idinor	0:dcf3c92487ca	1738	if (c == '\\' \|\| c == '"') {
idinor	0:dcf3c92487ca	1739	printer(arg, "\\");
idinor	0:dcf3c92487ca	1740	}
idinor	0:dcf3c92487ca	1741	printer(arg, "%c", c);
idinor	0:dcf3c92487ca	1742	} else {
idinor	0:dcf3c92487ca	1743	switch (c) {
idinor	0:dcf3c92487ca	1744	case '\n':
idinor	0:dcf3c92487ca	1745	printer(arg, "\\n");
idinor	0:dcf3c92487ca	1746	break;
idinor	0:dcf3c92487ca	1747	case '\r':
idinor	0:dcf3c92487ca	1748	printer(arg, "\\r");
idinor	0:dcf3c92487ca	1749	break;
idinor	0:dcf3c92487ca	1750	case '\t':
idinor	0:dcf3c92487ca	1751	printer(arg, "\\t");
idinor	0:dcf3c92487ca	1752	break;
idinor	0:dcf3c92487ca	1753	default:
idinor	0:dcf3c92487ca	1754	printer(arg, "\\%.3o", c);
idinor	0:dcf3c92487ca	1755	}
idinor	0:dcf3c92487ca	1756	}
idinor	0:dcf3c92487ca	1757	}
idinor	0:dcf3c92487ca	1758	printer(arg, "\"");
idinor	0:dcf3c92487ca	1759	}
idinor	0:dcf3c92487ca	1760
idinor	0:dcf3c92487ca	1761
idinor	0:dcf3c92487ca	1762	/*
idinor	0:dcf3c92487ca	1763	* lcp_printpkt - print the contents of an LCP packet.
idinor	0:dcf3c92487ca	1764	*/
idinor	0:dcf3c92487ca	1765	static char *lcp_codenames[] = {
idinor	0:dcf3c92487ca	1766	"ConfReq", "ConfAck", "ConfNak", "ConfRej",
idinor	0:dcf3c92487ca	1767	"TermReq", "TermAck", "CodeRej", "ProtRej",
idinor	0:dcf3c92487ca	1768	"EchoReq", "EchoRep", "DiscReq"
idinor	0:dcf3c92487ca	1769	};
idinor	0:dcf3c92487ca	1770
idinor	0:dcf3c92487ca	1771	static int
idinor	0:dcf3c92487ca	1772	lcp_printpkt( u_char p, int plen, void (printer) (void , char , ...), void *arg)
idinor	0:dcf3c92487ca	1773	{
idinor	0:dcf3c92487ca	1774	int code, id, len, olen;
idinor	0:dcf3c92487ca	1775	u_char pstart, optend;
idinor	0:dcf3c92487ca	1776	u_short cishort;
idinor	0:dcf3c92487ca	1777	u32_t cilong;
idinor	0:dcf3c92487ca	1778
idinor	0:dcf3c92487ca	1779	if (plen < HEADERLEN) {
idinor	0:dcf3c92487ca	1780	return 0;
idinor	0:dcf3c92487ca	1781	}
idinor	0:dcf3c92487ca	1782	pstart = p;
idinor	0:dcf3c92487ca	1783	GETCHAR(code, p);
idinor	0:dcf3c92487ca	1784	GETCHAR(id, p);
idinor	0:dcf3c92487ca	1785	GETSHORT(len, p);
idinor	0:dcf3c92487ca	1786	if (len < HEADERLEN \|\| len > plen) {
idinor	0:dcf3c92487ca	1787	return 0;
idinor	0:dcf3c92487ca	1788	}
idinor	0:dcf3c92487ca	1789
idinor	0:dcf3c92487ca	1790	if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *)) {
idinor	0:dcf3c92487ca	1791	printer(arg, " %s", lcp_codenames[code-1]);
idinor	0:dcf3c92487ca	1792	} else {
idinor	0:dcf3c92487ca	1793	printer(arg, " code=0x%x", code);
idinor	0:dcf3c92487ca	1794	}
idinor	0:dcf3c92487ca	1795	printer(arg, " id=0x%x", id);
idinor	0:dcf3c92487ca	1796	len -= HEADERLEN;
idinor	0:dcf3c92487ca	1797	switch (code) {
idinor	0:dcf3c92487ca	1798	case CONFREQ:
idinor	0:dcf3c92487ca	1799	case CONFACK:
idinor	0:dcf3c92487ca	1800	case CONFNAK:
idinor	0:dcf3c92487ca	1801	case CONFREJ:
idinor	0:dcf3c92487ca	1802	/* print option list */
idinor	0:dcf3c92487ca	1803	while (len >= 2) {
idinor	0:dcf3c92487ca	1804	GETCHAR(code, p);
idinor	0:dcf3c92487ca	1805	GETCHAR(olen, p);
idinor	0:dcf3c92487ca	1806	p -= 2;
idinor	0:dcf3c92487ca	1807	if (olen < 2 \|\| olen > len) {
idinor	0:dcf3c92487ca	1808	break;
idinor	0:dcf3c92487ca	1809	}
idinor	0:dcf3c92487ca	1810	printer(arg, " <");
idinor	0:dcf3c92487ca	1811	len -= olen;
idinor	0:dcf3c92487ca	1812	optend = p + olen;
idinor	0:dcf3c92487ca	1813	switch (code) {
idinor	0:dcf3c92487ca	1814	case CI_MRU:
idinor	0:dcf3c92487ca	1815	if (olen == CILEN_SHORT) {
idinor	0:dcf3c92487ca	1816	p += 2;
idinor	0:dcf3c92487ca	1817	GETSHORT(cishort, p);
idinor	0:dcf3c92487ca	1818	printer(arg, "mru %d", cishort);
idinor	0:dcf3c92487ca	1819	}
idinor	0:dcf3c92487ca	1820	break;
idinor	0:dcf3c92487ca	1821	case CI_ASYNCMAP:
idinor	0:dcf3c92487ca	1822	if (olen == CILEN_LONG) {
idinor	0:dcf3c92487ca	1823	p += 2;
idinor	0:dcf3c92487ca	1824	GETLONG(cilong, p);
idinor	0:dcf3c92487ca	1825	printer(arg, "asyncmap 0x%lx", cilong);
idinor	0:dcf3c92487ca	1826	}
idinor	0:dcf3c92487ca	1827	break;
idinor	0:dcf3c92487ca	1828	case CI_AUTHTYPE:
idinor	0:dcf3c92487ca	1829	if (olen >= CILEN_SHORT) {
idinor	0:dcf3c92487ca	1830	p += 2;
idinor	0:dcf3c92487ca	1831	printer(arg, "auth ");
idinor	0:dcf3c92487ca	1832	GETSHORT(cishort, p);
idinor	0:dcf3c92487ca	1833	switch (cishort) {
idinor	0:dcf3c92487ca	1834	case PPP_PAP:
idinor	0:dcf3c92487ca	1835	printer(arg, "pap");
idinor	0:dcf3c92487ca	1836	break;
idinor	0:dcf3c92487ca	1837	case PPP_CHAP:
idinor	0:dcf3c92487ca	1838	printer(arg, "chap");
idinor	0:dcf3c92487ca	1839	break;
idinor	0:dcf3c92487ca	1840	default:
idinor	0:dcf3c92487ca	1841	printer(arg, "0x%x", cishort);
idinor	0:dcf3c92487ca	1842	}
idinor	0:dcf3c92487ca	1843	}
idinor	0:dcf3c92487ca	1844	break;
idinor	0:dcf3c92487ca	1845	case CI_QUALITY:
idinor	0:dcf3c92487ca	1846	if (olen >= CILEN_SHORT) {
idinor	0:dcf3c92487ca	1847	p += 2;
idinor	0:dcf3c92487ca	1848	printer(arg, "quality ");
idinor	0:dcf3c92487ca	1849	GETSHORT(cishort, p);
idinor	0:dcf3c92487ca	1850	switch (cishort) {
idinor	0:dcf3c92487ca	1851	case PPP_LQR:
idinor	0:dcf3c92487ca	1852	printer(arg, "lqr");
idinor	0:dcf3c92487ca	1853	break;
idinor	0:dcf3c92487ca	1854	default:
idinor	0:dcf3c92487ca	1855	printer(arg, "0x%x", cishort);
idinor	0:dcf3c92487ca	1856	}
idinor	0:dcf3c92487ca	1857	}
idinor	0:dcf3c92487ca	1858	break;
idinor	0:dcf3c92487ca	1859	case CI_CALLBACK:
idinor	0:dcf3c92487ca	1860	if (olen >= CILEN_CHAR) {
idinor	0:dcf3c92487ca	1861	p += 2;
idinor	0:dcf3c92487ca	1862	printer(arg, "callback ");
idinor	0:dcf3c92487ca	1863	GETSHORT(cishort, p);
idinor	0:dcf3c92487ca	1864	switch (cishort) {
idinor	0:dcf3c92487ca	1865	case CBCP_OPT:
idinor	0:dcf3c92487ca	1866	printer(arg, "CBCP");
idinor	0:dcf3c92487ca	1867	break;
idinor	0:dcf3c92487ca	1868	default:
idinor	0:dcf3c92487ca	1869	printer(arg, "0x%x", cishort);
idinor	0:dcf3c92487ca	1870	}
idinor	0:dcf3c92487ca	1871	}
idinor	0:dcf3c92487ca	1872	break;
idinor	0:dcf3c92487ca	1873	case CI_MAGICNUMBER:
idinor	0:dcf3c92487ca	1874	if (olen == CILEN_LONG) {
idinor	0:dcf3c92487ca	1875	p += 2;
idinor	0:dcf3c92487ca	1876	GETLONG(cilong, p);
idinor	0:dcf3c92487ca	1877	printer(arg, "magic 0x%x", cilong);
idinor	0:dcf3c92487ca	1878	}
idinor	0:dcf3c92487ca	1879	break;
idinor	0:dcf3c92487ca	1880	case CI_PCOMPRESSION:
idinor	0:dcf3c92487ca	1881	if (olen == CILEN_VOID) {
idinor	0:dcf3c92487ca	1882	p += 2;
idinor	0:dcf3c92487ca	1883	printer(arg, "pcomp");
idinor	0:dcf3c92487ca	1884	}
idinor	0:dcf3c92487ca	1885	break;
idinor	0:dcf3c92487ca	1886	case CI_ACCOMPRESSION:
idinor	0:dcf3c92487ca	1887	if (olen == CILEN_VOID) {
idinor	0:dcf3c92487ca	1888	p += 2;
idinor	0:dcf3c92487ca	1889	printer(arg, "accomp");
idinor	0:dcf3c92487ca	1890	}
idinor	0:dcf3c92487ca	1891	break;
idinor	0:dcf3c92487ca	1892	}
idinor	0:dcf3c92487ca	1893	while (p < optend) {
idinor	0:dcf3c92487ca	1894	GETCHAR(code, p);
idinor	0:dcf3c92487ca	1895	printer(arg, " %.2x", code);
idinor	0:dcf3c92487ca	1896	}
idinor	0:dcf3c92487ca	1897	printer(arg, ">");
idinor	0:dcf3c92487ca	1898	}
idinor	0:dcf3c92487ca	1899	break;
idinor	0:dcf3c92487ca	1900
idinor	0:dcf3c92487ca	1901	case TERMACK:
idinor	0:dcf3c92487ca	1902	case TERMREQ:
idinor	0:dcf3c92487ca	1903	if (len > 0 && p >= ' ' && p < 0x7f) {
idinor	0:dcf3c92487ca	1904	printer(arg, " ");
idinor	0:dcf3c92487ca	1905	print_string((char*)p, len, printer, arg);
idinor	0:dcf3c92487ca	1906	p += len;
idinor	0:dcf3c92487ca	1907	len = 0;
idinor	0:dcf3c92487ca	1908	}
idinor	0:dcf3c92487ca	1909	break;
idinor	0:dcf3c92487ca	1910
idinor	0:dcf3c92487ca	1911	case ECHOREQ:
idinor	0:dcf3c92487ca	1912	case ECHOREP:
idinor	0:dcf3c92487ca	1913	case DISCREQ:
idinor	0:dcf3c92487ca	1914	if (len >= 4) {
idinor	0:dcf3c92487ca	1915	GETLONG(cilong, p);
idinor	0:dcf3c92487ca	1916	printer(arg, " magic=0x%x", cilong);
idinor	0:dcf3c92487ca	1917	p += 4;
idinor	0:dcf3c92487ca	1918	len -= 4;
idinor	0:dcf3c92487ca	1919	}
idinor	0:dcf3c92487ca	1920	break;
idinor	0:dcf3c92487ca	1921	}
idinor	0:dcf3c92487ca	1922
idinor	0:dcf3c92487ca	1923	/* print the rest of the bytes in the packet */
idinor	0:dcf3c92487ca	1924	for (; len > 0; --len) {
idinor	0:dcf3c92487ca	1925	GETCHAR(code, p);
idinor	0:dcf3c92487ca	1926	printer(arg, " %.2x", code);
idinor	0:dcf3c92487ca	1927	}
idinor	0:dcf3c92487ca	1928
idinor	0:dcf3c92487ca	1929	return (int)(p - pstart);
idinor	0:dcf3c92487ca	1930	}
idinor	0:dcf3c92487ca	1931	#endif /* PPP_ADDITIONAL_CALLBACKS */
idinor	0:dcf3c92487ca	1932
idinor	0:dcf3c92487ca	1933	/*
idinor	0:dcf3c92487ca	1934	* Time to shut down the link because there is nothing out there.
idinor	0:dcf3c92487ca	1935	*/
idinor	0:dcf3c92487ca	1936	static void
idinor	0:dcf3c92487ca	1937	LcpLinkFailure (fsm *f)
idinor	0:dcf3c92487ca	1938	{
idinor	0:dcf3c92487ca	1939	if (f->state == LS_OPENED) {
idinor	0:dcf3c92487ca	1940	LCPDEBUG(LOG_INFO, ("No response to %d echo-requests\n", lcp_echos_pending));
idinor	0:dcf3c92487ca	1941	LCPDEBUG(LOG_NOTICE, ("Serial link appears to be disconnected.\n"));
idinor	0:dcf3c92487ca	1942	lcp_close(f->unit, "Peer not responding");
idinor	0:dcf3c92487ca	1943	}
idinor	0:dcf3c92487ca	1944	}
idinor	0:dcf3c92487ca	1945
idinor	0:dcf3c92487ca	1946	/*
idinor	0:dcf3c92487ca	1947	* Timer expired for the LCP echo requests from this process.
idinor	0:dcf3c92487ca	1948	*/
idinor	0:dcf3c92487ca	1949	static void
idinor	0:dcf3c92487ca	1950	LcpEchoCheck (fsm *f)
idinor	0:dcf3c92487ca	1951	{
idinor	0:dcf3c92487ca	1952	LcpSendEchoRequest (f);
idinor	0:dcf3c92487ca	1953
idinor	0:dcf3c92487ca	1954	/*
idinor	0:dcf3c92487ca	1955	* Start the timer for the next interval.
idinor	0:dcf3c92487ca	1956	*/
idinor	0:dcf3c92487ca	1957	LWIP_ASSERT("lcp_echo_timer_running == 0", lcp_echo_timer_running == 0);
idinor	0:dcf3c92487ca	1958
idinor	0:dcf3c92487ca	1959	TIMEOUT (LcpEchoTimeout, f, lcp_echo_interval);
idinor	0:dcf3c92487ca	1960	lcp_echo_timer_running = 1;
idinor	0:dcf3c92487ca	1961	}
idinor	0:dcf3c92487ca	1962
idinor	0:dcf3c92487ca	1963	/*
idinor	0:dcf3c92487ca	1964	* LcpEchoTimeout - Timer expired on the LCP echo
idinor	0:dcf3c92487ca	1965	*/
idinor	0:dcf3c92487ca	1966	static void
idinor	0:dcf3c92487ca	1967	LcpEchoTimeout (void *arg)
idinor	0:dcf3c92487ca	1968	{
idinor	0:dcf3c92487ca	1969	if (lcp_echo_timer_running != 0) {
idinor	0:dcf3c92487ca	1970	lcp_echo_timer_running = 0;
idinor	0:dcf3c92487ca	1971	LcpEchoCheck ((fsm *) arg);
idinor	0:dcf3c92487ca	1972	}
idinor	0:dcf3c92487ca	1973	}
idinor	0:dcf3c92487ca	1974
idinor	0:dcf3c92487ca	1975	/*
idinor	0:dcf3c92487ca	1976	* LcpEchoReply - LCP has received a reply to the echo
idinor	0:dcf3c92487ca	1977	*/
idinor	0:dcf3c92487ca	1978	static void
idinor	0:dcf3c92487ca	1979	lcp_received_echo_reply (fsm f, int id, u_char inp, int len)
idinor	0:dcf3c92487ca	1980	{
idinor	0:dcf3c92487ca	1981	u32_t magic;
idinor	0:dcf3c92487ca	1982
idinor	0:dcf3c92487ca	1983	LWIP_UNUSED_ARG(id);
idinor	0:dcf3c92487ca	1984
idinor	0:dcf3c92487ca	1985	/* Check the magic number - don't count replies from ourselves. */
idinor	0:dcf3c92487ca	1986	if (len < 4) {
idinor	0:dcf3c92487ca	1987	LCPDEBUG(LOG_WARNING, ("lcp: received short Echo-Reply, length %d\n", len));
idinor	0:dcf3c92487ca	1988	return;
idinor	0:dcf3c92487ca	1989	}
idinor	0:dcf3c92487ca	1990	GETLONG(magic, inp);
idinor	0:dcf3c92487ca	1991	if (lcp_gotoptions[f->unit].neg_magicnumber && magic == lcp_gotoptions[f->unit].magicnumber) {
idinor	0:dcf3c92487ca	1992	LCPDEBUG(LOG_WARNING, ("appear to have received our own echo-reply!\n"));
idinor	0:dcf3c92487ca	1993	return;
idinor	0:dcf3c92487ca	1994	}
idinor	0:dcf3c92487ca	1995
idinor	0:dcf3c92487ca	1996	/* Reset the number of outstanding echo frames */
idinor	0:dcf3c92487ca	1997	lcp_echos_pending = 0;
idinor	0:dcf3c92487ca	1998	}
idinor	0:dcf3c92487ca	1999
idinor	0:dcf3c92487ca	2000	/*
idinor	0:dcf3c92487ca	2001	* LcpSendEchoRequest - Send an echo request frame to the peer
idinor	0:dcf3c92487ca	2002	*/
idinor	0:dcf3c92487ca	2003	static void
idinor	0:dcf3c92487ca	2004	LcpSendEchoRequest (fsm *f)
idinor	0:dcf3c92487ca	2005	{
idinor	0:dcf3c92487ca	2006	u32_t lcp_magic;
idinor	0:dcf3c92487ca	2007	u_char pkt[4], *pktp;
idinor	0:dcf3c92487ca	2008
idinor	0:dcf3c92487ca	2009	/*
idinor	0:dcf3c92487ca	2010	* Detect the failure of the peer at this point.
idinor	0:dcf3c92487ca	2011	*/
idinor	0:dcf3c92487ca	2012	if (lcp_echo_fails != 0) {
idinor	0:dcf3c92487ca	2013	if (lcp_echos_pending >= lcp_echo_fails) {
idinor	0:dcf3c92487ca	2014	LcpLinkFailure(f);
idinor	0:dcf3c92487ca	2015	lcp_echos_pending = 0;
idinor	0:dcf3c92487ca	2016	}
idinor	0:dcf3c92487ca	2017	}
idinor	0:dcf3c92487ca	2018
idinor	0:dcf3c92487ca	2019	/*
idinor	0:dcf3c92487ca	2020	* Make and send the echo request frame.
idinor	0:dcf3c92487ca	2021	*/
idinor	0:dcf3c92487ca	2022	if (f->state == LS_OPENED) {
idinor	0:dcf3c92487ca	2023	lcp_magic = lcp_gotoptions[f->unit].magicnumber;
idinor	0:dcf3c92487ca	2024	pktp = pkt;
idinor	0:dcf3c92487ca	2025	PUTLONG(lcp_magic, pktp);
idinor	0:dcf3c92487ca	2026	fsm_sdata(f, ECHOREQ, (u_char)(lcp_echo_number++ & 0xFF), pkt, (int)(pktp - pkt));
idinor	0:dcf3c92487ca	2027	++lcp_echos_pending;
idinor	0:dcf3c92487ca	2028	}
idinor	0:dcf3c92487ca	2029	}
idinor	0:dcf3c92487ca	2030
idinor	0:dcf3c92487ca	2031	/*
idinor	0:dcf3c92487ca	2032	* lcp_echo_lowerup - Start the timer for the LCP frame
idinor	0:dcf3c92487ca	2033	*/
idinor	0:dcf3c92487ca	2034
idinor	0:dcf3c92487ca	2035	static void
idinor	0:dcf3c92487ca	2036	lcp_echo_lowerup (int unit)
idinor	0:dcf3c92487ca	2037	{
idinor	0:dcf3c92487ca	2038	fsm *f = &lcp_fsm[unit];
idinor	0:dcf3c92487ca	2039
idinor	0:dcf3c92487ca	2040	/* Clear the parameters for generating echo frames */
idinor	0:dcf3c92487ca	2041	lcp_echos_pending = 0;
idinor	0:dcf3c92487ca	2042	lcp_echo_number = 0;
idinor	0:dcf3c92487ca	2043	lcp_echo_timer_running = 0;
idinor	0:dcf3c92487ca	2044
idinor	0:dcf3c92487ca	2045	/* If a timeout interval is specified then start the timer */
idinor	0:dcf3c92487ca	2046	if (lcp_echo_interval != 0) {
idinor	0:dcf3c92487ca	2047	LcpEchoCheck (f);
idinor	0:dcf3c92487ca	2048	}
idinor	0:dcf3c92487ca	2049	}
idinor	0:dcf3c92487ca	2050
idinor	0:dcf3c92487ca	2051	/*
idinor	0:dcf3c92487ca	2052	* lcp_echo_lowerdown - Stop the timer for the LCP frame
idinor	0:dcf3c92487ca	2053	*/
idinor	0:dcf3c92487ca	2054
idinor	0:dcf3c92487ca	2055	static void
idinor	0:dcf3c92487ca	2056	lcp_echo_lowerdown (int unit)
idinor	0:dcf3c92487ca	2057	{
idinor	0:dcf3c92487ca	2058	fsm *f = &lcp_fsm[unit];
idinor	0:dcf3c92487ca	2059
idinor	0:dcf3c92487ca	2060	if (lcp_echo_timer_running != 0) {
idinor	0:dcf3c92487ca	2061	UNTIMEOUT (LcpEchoTimeout, f);
idinor	0:dcf3c92487ca	2062	lcp_echo_timer_running = 0;
idinor	0:dcf3c92487ca	2063	}
idinor	0:dcf3c92487ca	2064	}
idinor	0:dcf3c92487ca	2065
idinor	0:dcf3c92487ca	2066	#endif /* PPP_SUPPORT */

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Type:	Library
Created:	20 Jul 2011
Imports:	35
Forks:	0
Commits:	1
Dependents:	1
Dependencies:	0
Followers:	1

lwip/netif/ppp/lcp.c@0:dcf3c92487ca, 2011-07-20 (annotated)

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