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lwip/netif/ppp/lcp.c@0:350011bf8be7, 2010-11-23 (annotated)

Committer:: simon
Date:: Tue Nov 23 14:15:36 2010 +0000
Revision:: 0:350011bf8be7

Experimental version for testing UDP

Who changed what in which revision?

User	Revision	Line number	New contents of line
simon	0:350011bf8be7	1	/*****************************************************************************
simon	0:350011bf8be7	2	* lcp.c - Network Link Control Protocol program file.
simon	0:350011bf8be7	3	*
simon	0:350011bf8be7	4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
simon	0:350011bf8be7	5	* portions Copyright (c) 1997 by Global Election Systems Inc.
simon	0:350011bf8be7	6	*
simon	0:350011bf8be7	7	* The authors hereby grant permission to use, copy, modify, distribute,
simon	0:350011bf8be7	8	* and license this software and its documentation for any purpose, provided
simon	0:350011bf8be7	9	* that existing copyright notices are retained in all copies and that this
simon	0:350011bf8be7	10	* notice and the following disclaimer are included verbatim in any
simon	0:350011bf8be7	11	* distributions. No written agreement, license, or royalty fee is required
simon	0:350011bf8be7	12	* for any of the authorized uses.
simon	0:350011bf8be7	13	*
simon	0:350011bf8be7	14	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
simon	0:350011bf8be7	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
simon	0:350011bf8be7	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
simon	0:350011bf8be7	17	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
simon	0:350011bf8be7	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
simon	0:350011bf8be7	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
simon	0:350011bf8be7	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
simon	0:350011bf8be7	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
simon	0:350011bf8be7	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
simon	0:350011bf8be7	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
simon	0:350011bf8be7	24	*
simon	0:350011bf8be7	25	******************************************************************************
simon	0:350011bf8be7	26	* REVISION HISTORY
simon	0:350011bf8be7	27	*
simon	0:350011bf8be7	28	* 03-01-01 Marc Boucher <marc@mbsi.ca>
simon	0:350011bf8be7	29	* Ported to lwIP.
simon	0:350011bf8be7	30	* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
simon	0:350011bf8be7	31	* Original.
simon	0:350011bf8be7	32	*****************************************************************************/
simon	0:350011bf8be7	33
simon	0:350011bf8be7	34	/*
simon	0:350011bf8be7	35	* lcp.c - PPP Link Control Protocol.
simon	0:350011bf8be7	36	*
simon	0:350011bf8be7	37	* Copyright (c) 1989 Carnegie Mellon University.
simon	0:350011bf8be7	38	* All rights reserved.
simon	0:350011bf8be7	39	*
simon	0:350011bf8be7	40	* Redistribution and use in source and binary forms are permitted
simon	0:350011bf8be7	41	* provided that the above copyright notice and this paragraph are
simon	0:350011bf8be7	42	* duplicated in all such forms and that any documentation,
simon	0:350011bf8be7	43	* advertising materials, and other materials related to such
simon	0:350011bf8be7	44	* distribution and use acknowledge that the software was developed
simon	0:350011bf8be7	45	* by Carnegie Mellon University. The name of the
simon	0:350011bf8be7	46	* University may not be used to endorse or promote products derived
simon	0:350011bf8be7	47	* from this software without specific prior written permission.
simon	0:350011bf8be7	48	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
simon	0:350011bf8be7	49	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
simon	0:350011bf8be7	50	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
simon	0:350011bf8be7	51	*/
simon	0:350011bf8be7	52
simon	0:350011bf8be7	53
simon	0:350011bf8be7	54	#include "lwip/opt.h"
simon	0:350011bf8be7	55
simon	0:350011bf8be7	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
simon	0:350011bf8be7	57
simon	0:350011bf8be7	58	#include "ppp.h"
simon	0:350011bf8be7	59	#include "pppdebug.h"
simon	0:350011bf8be7	60
simon	0:350011bf8be7	61	#include "fsm.h"
simon	0:350011bf8be7	62	#include "chap.h"
simon	0:350011bf8be7	63	#include "magic.h"
simon	0:350011bf8be7	64	#include "auth.h"
simon	0:350011bf8be7	65	#include "lcp.h"
simon	0:350011bf8be7	66
simon	0:350011bf8be7	67	#include <string.h>
simon	0:350011bf8be7	68
simon	0:350011bf8be7	69	#if PPPOE_SUPPORT
simon	0:350011bf8be7	70	#include "netif/ppp_oe.h"
simon	0:350011bf8be7	71	#else
simon	0:350011bf8be7	72	#define PPPOE_MAXMTU PPP_MAXMRU
simon	0:350011bf8be7	73	#endif
simon	0:350011bf8be7	74
simon	0:350011bf8be7	75	#if 0 /* UNUSED */
simon	0:350011bf8be7	76	/*
simon	0:350011bf8be7	77	* LCP-related command-line options.
simon	0:350011bf8be7	78	*/
simon	0:350011bf8be7	79	int lcp_echo_interval = 0; /* Interval between LCP echo-requests */
simon	0:350011bf8be7	80	int lcp_echo_fails = 0; /* Tolerance to unanswered echo-requests */
simon	0:350011bf8be7	81	bool lax_recv = 0; /* accept control chars in asyncmap */
simon	0:350011bf8be7	82
simon	0:350011bf8be7	83	static int setescape (char **);
simon	0:350011bf8be7	84
simon	0:350011bf8be7	85	static option_t lcp_option_list[] = {
simon	0:350011bf8be7	86	/* LCP options */
simon	0:350011bf8be7	87	/* list stripped for simplicity */
simon	0:350011bf8be7	88	{NULL}
simon	0:350011bf8be7	89	};
simon	0:350011bf8be7	90	#endif /* UNUSED */
simon	0:350011bf8be7	91
simon	0:350011bf8be7	92	/* options */
simon	0:350011bf8be7	93	LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */
simon	0:350011bf8be7	94	static u_int lcp_echo_interval = LCP_ECHOINTERVAL; /* Interval between LCP echo-requests */
simon	0:350011bf8be7	95	static u_int lcp_echo_fails = LCP_MAXECHOFAILS; /* Tolerance to unanswered echo-requests */
simon	0:350011bf8be7	96
simon	0:350011bf8be7	97	/* global vars */
simon	0:350011bf8be7	98	static fsm lcp_fsm[NUM_PPP]; /* LCP fsm structure (global)*/
simon	0:350011bf8be7	99	lcp_options lcp_wantoptions[NUM_PPP]; /* Options that we want to request */
simon	0:350011bf8be7	100	lcp_options lcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
simon	0:350011bf8be7	101	lcp_options lcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
simon	0:350011bf8be7	102	lcp_options lcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
simon	0:350011bf8be7	103	ext_accm xmit_accm[NUM_PPP]; /* extended transmit ACCM */
simon	0:350011bf8be7	104
simon	0:350011bf8be7	105	static u32_t lcp_echos_pending = 0; /* Number of outstanding echo msgs */
simon	0:350011bf8be7	106	static u32_t lcp_echo_number = 0; /* ID number of next echo frame */
simon	0:350011bf8be7	107	static u32_t lcp_echo_timer_running = 0; /* TRUE if a timer is running */
simon	0:350011bf8be7	108
simon	0:350011bf8be7	109	/* @todo: do we really need such a large buffer? The typical 1500 bytes seem too much. */
simon	0:350011bf8be7	110	static u_char nak_buffer[PPP_MRU]; /* where we construct a nak packet */
simon	0:350011bf8be7	111
simon	0:350011bf8be7	112	/*
simon	0:350011bf8be7	113	* Callbacks for fsm code. (CI = Configuration Information)
simon	0:350011bf8be7	114	*/
simon	0:350011bf8be7	115	static void lcp_resetci (fsm); / Reset our CI */
simon	0:350011bf8be7	116	static int lcp_cilen (fsm); / Return length of our CI */
simon	0:350011bf8be7	117	static void lcp_addci (fsm, u_char, int); / Add our CI to pkt */
simon	0:350011bf8be7	118	static int lcp_ackci (fsm, u_char, int); /* Peer ack'd our CI */
simon	0:350011bf8be7	119	static int lcp_nakci (fsm, u_char, int); /* Peer nak'd our CI */
simon	0:350011bf8be7	120	static int lcp_rejci (fsm, u_char, int); /* Peer rej'd our CI */
simon	0:350011bf8be7	121	static int lcp_reqci (fsm, u_char, int, int); / Rcv peer CI */
simon	0:350011bf8be7	122	static void lcp_up (fsm); / We're UP */
simon	0:350011bf8be7	123	static void lcp_down (fsm); / We're DOWN */
simon	0:350011bf8be7	124	static void lcp_starting (fsm); / We need lower layer up */
simon	0:350011bf8be7	125	static void lcp_finished (fsm); / We need lower layer down */
simon	0:350011bf8be7	126	static int lcp_extcode (fsm, int, u_char, u_char, int);
simon	0:350011bf8be7	127	static void lcp_rprotrej (fsm, u_char, int);
simon	0:350011bf8be7	128
simon	0:350011bf8be7	129	/*
simon	0:350011bf8be7	130	* routines to send LCP echos to peer
simon	0:350011bf8be7	131	*/
simon	0:350011bf8be7	132
simon	0:350011bf8be7	133	static void lcp_echo_lowerup (int);
simon	0:350011bf8be7	134	static void lcp_echo_lowerdown (int);
simon	0:350011bf8be7	135	static void LcpEchoTimeout (void*);
simon	0:350011bf8be7	136	static void lcp_received_echo_reply (fsm, int, u_char, int);
simon	0:350011bf8be7	137	static void LcpSendEchoRequest (fsm*);
simon	0:350011bf8be7	138	static void LcpLinkFailure (fsm*);
simon	0:350011bf8be7	139	static void LcpEchoCheck (fsm*);
simon	0:350011bf8be7	140
simon	0:350011bf8be7	141	static fsm_callbacks lcp_callbacks = { /* LCP callback routines */
simon	0:350011bf8be7	142	lcp_resetci, /* Reset our Configuration Information */
simon	0:350011bf8be7	143	lcp_cilen, /* Length of our Configuration Information */
simon	0:350011bf8be7	144	lcp_addci, /* Add our Configuration Information */
simon	0:350011bf8be7	145	lcp_ackci, /* ACK our Configuration Information */
simon	0:350011bf8be7	146	lcp_nakci, /* NAK our Configuration Information */
simon	0:350011bf8be7	147	lcp_rejci, /* Reject our Configuration Information */
simon	0:350011bf8be7	148	lcp_reqci, /* Request peer's Configuration Information */
simon	0:350011bf8be7	149	lcp_up, /* Called when fsm reaches LS_OPENED state */
simon	0:350011bf8be7	150	lcp_down, /* Called when fsm leaves LS_OPENED state */
simon	0:350011bf8be7	151	lcp_starting, /* Called when we want the lower layer up */
simon	0:350011bf8be7	152	lcp_finished, /* Called when we want the lower layer down */
simon	0:350011bf8be7	153	NULL, /* Called when Protocol-Reject received */
simon	0:350011bf8be7	154	NULL, /* Retransmission is necessary */
simon	0:350011bf8be7	155	lcp_extcode, /* Called to handle LCP-specific codes */
simon	0:350011bf8be7	156	"LCP" /* String name of protocol */
simon	0:350011bf8be7	157	};
simon	0:350011bf8be7	158
simon	0:350011bf8be7	159	/*
simon	0:350011bf8be7	160	* Protocol entry points.
simon	0:350011bf8be7	161	* Some of these are called directly.
simon	0:350011bf8be7	162	*/
simon	0:350011bf8be7	163
simon	0:350011bf8be7	164	static void lcp_input (int, u_char *, int);
simon	0:350011bf8be7	165	static void lcp_protrej (int);
simon	0:350011bf8be7	166
simon	0:350011bf8be7	167	struct protent lcp_protent = {
simon	0:350011bf8be7	168	PPP_LCP,
simon	0:350011bf8be7	169	lcp_init,
simon	0:350011bf8be7	170	lcp_input,
simon	0:350011bf8be7	171	lcp_protrej,
simon	0:350011bf8be7	172	lcp_lowerup,
simon	0:350011bf8be7	173	lcp_lowerdown,
simon	0:350011bf8be7	174	lcp_open,
simon	0:350011bf8be7	175	lcp_close,
simon	0:350011bf8be7	176	#if PPP_ADDITIONAL_CALLBACKS
simon	0:350011bf8be7	177	lcp_printpkt,
simon	0:350011bf8be7	178	NULL,
simon	0:350011bf8be7	179	#endif /* PPP_ADDITIONAL_CALLBACKS */
simon	0:350011bf8be7	180	1,
simon	0:350011bf8be7	181	"LCP",
simon	0:350011bf8be7	182	#if PPP_ADDITIONAL_CALLBACKS
simon	0:350011bf8be7	183	NULL,
simon	0:350011bf8be7	184	NULL,
simon	0:350011bf8be7	185	NULL
simon	0:350011bf8be7	186	#endif /* PPP_ADDITIONAL_CALLBACKS */
simon	0:350011bf8be7	187	};
simon	0:350011bf8be7	188
simon	0:350011bf8be7	189	int lcp_loopbackfail = DEFLOOPBACKFAIL;
simon	0:350011bf8be7	190
simon	0:350011bf8be7	191	/*
simon	0:350011bf8be7	192	* Length of each type of configuration option (in octets)
simon	0:350011bf8be7	193	*/
simon	0:350011bf8be7	194	#define CILEN_VOID 2
simon	0:350011bf8be7	195	#define CILEN_CHAR 3
simon	0:350011bf8be7	196	#define CILEN_SHORT 4 /* CILEN_VOID + sizeof(short) */
simon	0:350011bf8be7	197	#define CILEN_CHAP 5 /* CILEN_VOID + sizeof(short) + 1 */
simon	0:350011bf8be7	198	#define CILEN_LONG 6 /* CILEN_VOID + sizeof(long) */
simon	0:350011bf8be7	199	#define CILEN_LQR 8 /* CILEN_VOID + sizeof(short) + sizeof(long) */
simon	0:350011bf8be7	200	#define CILEN_CBCP 3
simon	0:350011bf8be7	201
simon	0:350011bf8be7	202	#define CODENAME(x) ((x) == CONFACK ? "ACK" : (x) == CONFNAK ? "NAK" : "REJ")
simon	0:350011bf8be7	203
simon	0:350011bf8be7	204	#if 0 /* UNUSED */
simon	0:350011bf8be7	205	/*
simon	0:350011bf8be7	206	* setescape - add chars to the set we escape on transmission.
simon	0:350011bf8be7	207	*/
simon	0:350011bf8be7	208	static int
simon	0:350011bf8be7	209	setescape(argv)
simon	0:350011bf8be7	210	char **argv;
simon	0:350011bf8be7	211	{
simon	0:350011bf8be7	212	int n, ret;
simon	0:350011bf8be7	213	char p, endp;
simon	0:350011bf8be7	214
simon	0:350011bf8be7	215	p = *argv;
simon	0:350011bf8be7	216	ret = 1;
simon	0:350011bf8be7	217	while (*p) {
simon	0:350011bf8be7	218	n = strtol(p, &endp, 16);
simon	0:350011bf8be7	219	if (p == endp) {
simon	0:350011bf8be7	220	option_error("escape parameter contains invalid hex number '%s'", p);
simon	0:350011bf8be7	221	return 0;
simon	0:350011bf8be7	222	}
simon	0:350011bf8be7	223	p = endp;
simon	0:350011bf8be7	224	if (n < 0 \|\| n == 0x5E \|\| n > 0xFF) {
simon	0:350011bf8be7	225	option_error("can't escape character 0x%x", n);
simon	0:350011bf8be7	226	ret = 0;
simon	0:350011bf8be7	227	} else
simon	0:350011bf8be7	228	xmit_accm[0][n >> 5] \|= 1 << (n & 0x1F);
simon	0:350011bf8be7	229	while (p == ',' \|\| p == ' ')
simon	0:350011bf8be7	230	++p;
simon	0:350011bf8be7	231	}
simon	0:350011bf8be7	232	return ret;
simon	0:350011bf8be7	233	}
simon	0:350011bf8be7	234	#endif /* UNUSED */
simon	0:350011bf8be7	235
simon	0:350011bf8be7	236	/*
simon	0:350011bf8be7	237	* lcp_init - Initialize LCP.
simon	0:350011bf8be7	238	*/
simon	0:350011bf8be7	239	void
simon	0:350011bf8be7	240	lcp_init(int unit)
simon	0:350011bf8be7	241	{
simon	0:350011bf8be7	242	fsm *f = &lcp_fsm[unit];
simon	0:350011bf8be7	243	lcp_options *wo = &lcp_wantoptions[unit];
simon	0:350011bf8be7	244	lcp_options *ao = &lcp_allowoptions[unit];
simon	0:350011bf8be7	245
simon	0:350011bf8be7	246	f->unit = unit;
simon	0:350011bf8be7	247	f->protocol = PPP_LCP;
simon	0:350011bf8be7	248	f->callbacks = &lcp_callbacks;
simon	0:350011bf8be7	249
simon	0:350011bf8be7	250	fsm_init(f);
simon	0:350011bf8be7	251
simon	0:350011bf8be7	252	wo->passive = 0;
simon	0:350011bf8be7	253	wo->silent = 0;
simon	0:350011bf8be7	254	wo->restart = 0; /* Set to 1 in kernels or multi-line implementations */
simon	0:350011bf8be7	255	wo->neg_mru = 1;
simon	0:350011bf8be7	256	wo->mru = PPP_DEFMRU;
simon	0:350011bf8be7	257	wo->neg_asyncmap = 1;
simon	0:350011bf8be7	258	wo->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
simon	0:350011bf8be7	259	wo->neg_chap = 0; /* Set to 1 on server */
simon	0:350011bf8be7	260	wo->neg_upap = 0; /* Set to 1 on server */
simon	0:350011bf8be7	261	wo->chap_mdtype = CHAP_DIGEST_MD5;
simon	0:350011bf8be7	262	wo->neg_magicnumber = 1;
simon	0:350011bf8be7	263	wo->neg_pcompression = 1;
simon	0:350011bf8be7	264	wo->neg_accompression = 1;
simon	0:350011bf8be7	265	wo->neg_lqr = 0; /* no LQR implementation yet */
simon	0:350011bf8be7	266	wo->neg_cbcp = 0;
simon	0:350011bf8be7	267
simon	0:350011bf8be7	268	ao->neg_mru = 1;
simon	0:350011bf8be7	269	ao->mru = PPP_MAXMRU;
simon	0:350011bf8be7	270	ao->neg_asyncmap = 1;
simon	0:350011bf8be7	271	ao->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
simon	0:350011bf8be7	272	ao->neg_chap = (CHAP_SUPPORT != 0);
simon	0:350011bf8be7	273	ao->chap_mdtype = CHAP_DIGEST_MD5;
simon	0:350011bf8be7	274	ao->neg_upap = (PAP_SUPPORT != 0);
simon	0:350011bf8be7	275	ao->neg_magicnumber = 1;
simon	0:350011bf8be7	276	ao->neg_pcompression = 1;
simon	0:350011bf8be7	277	ao->neg_accompression = 1;
simon	0:350011bf8be7	278	ao->neg_lqr = 0; /* no LQR implementation yet */
simon	0:350011bf8be7	279	ao->neg_cbcp = (CBCP_SUPPORT != 0);
simon	0:350011bf8be7	280
simon	0:350011bf8be7	281	/*
simon	0:350011bf8be7	282	* Set transmit escape for the flag and escape characters plus anything
simon	0:350011bf8be7	283	* set for the allowable options.
simon	0:350011bf8be7	284	*/
simon	0:350011bf8be7	285	memset(xmit_accm[unit], 0, sizeof(xmit_accm[0]));
simon	0:350011bf8be7	286	xmit_accm[unit][15] = 0x60;
simon	0:350011bf8be7	287	xmit_accm[unit][0] = (u_char)((ao->asyncmap & 0xFF));
simon	0:350011bf8be7	288	xmit_accm[unit][1] = (u_char)((ao->asyncmap >> 8) & 0xFF);
simon	0:350011bf8be7	289	xmit_accm[unit][2] = (u_char)((ao->asyncmap >> 16) & 0xFF);
simon	0:350011bf8be7	290	xmit_accm[unit][3] = (u_char)((ao->asyncmap >> 24) & 0xFF);
simon	0:350011bf8be7	291	LCPDEBUG(LOG_INFO, ("lcp_init: xmit_accm=%X %X %X %X\n",
simon	0:350011bf8be7	292	xmit_accm[unit][0],
simon	0:350011bf8be7	293	xmit_accm[unit][1],
simon	0:350011bf8be7	294	xmit_accm[unit][2],
simon	0:350011bf8be7	295	xmit_accm[unit][3]));
simon	0:350011bf8be7	296
simon	0:350011bf8be7	297	lcp_phase[unit] = PHASE_INITIALIZE;
simon	0:350011bf8be7	298	}
simon	0:350011bf8be7	299
simon	0:350011bf8be7	300
simon	0:350011bf8be7	301	/*
simon	0:350011bf8be7	302	* lcp_open - LCP is allowed to come up.
simon	0:350011bf8be7	303	*/
simon	0:350011bf8be7	304	void
simon	0:350011bf8be7	305	lcp_open(int unit)
simon	0:350011bf8be7	306	{
simon	0:350011bf8be7	307	fsm *f = &lcp_fsm[unit];
simon	0:350011bf8be7	308	lcp_options *wo = &lcp_wantoptions[unit];
simon	0:350011bf8be7	309
simon	0:350011bf8be7	310	f->flags = 0;
simon	0:350011bf8be7	311	if (wo->passive) {
simon	0:350011bf8be7	312	f->flags \|= OPT_PASSIVE;
simon	0:350011bf8be7	313	}
simon	0:350011bf8be7	314	if (wo->silent) {
simon	0:350011bf8be7	315	f->flags \|= OPT_SILENT;
simon	0:350011bf8be7	316	}
simon	0:350011bf8be7	317	fsm_open(f);
simon	0:350011bf8be7	318
simon	0:350011bf8be7	319	lcp_phase[unit] = PHASE_ESTABLISH;
simon	0:350011bf8be7	320	}
simon	0:350011bf8be7	321
simon	0:350011bf8be7	322
simon	0:350011bf8be7	323	/*
simon	0:350011bf8be7	324	* lcp_close - Take LCP down.
simon	0:350011bf8be7	325	*/
simon	0:350011bf8be7	326	void
simon	0:350011bf8be7	327	lcp_close(int unit, char *reason)
simon	0:350011bf8be7	328	{
simon	0:350011bf8be7	329	fsm *f = &lcp_fsm[unit];
simon	0:350011bf8be7	330
simon	0:350011bf8be7	331	if (lcp_phase[unit] != PHASE_DEAD) {
simon	0:350011bf8be7	332	lcp_phase[unit] = PHASE_TERMINATE;
simon	0:350011bf8be7	333	}
simon	0:350011bf8be7	334	if (f->state == LS_STOPPED && f->flags & (OPT_PASSIVE\|OPT_SILENT)) {
simon	0:350011bf8be7	335	/*
simon	0:350011bf8be7	336	* This action is not strictly according to the FSM in RFC1548,
simon	0:350011bf8be7	337	* but it does mean that the program terminates if you do an
simon	0:350011bf8be7	338	* lcp_close() in passive/silent mode when a connection hasn't
simon	0:350011bf8be7	339	* been established.
simon	0:350011bf8be7	340	*/
simon	0:350011bf8be7	341	f->state = LS_CLOSED;
simon	0:350011bf8be7	342	lcp_finished(f);
simon	0:350011bf8be7	343	} else {
simon	0:350011bf8be7	344	fsm_close(f, reason);
simon	0:350011bf8be7	345	}
simon	0:350011bf8be7	346	}
simon	0:350011bf8be7	347
simon	0:350011bf8be7	348
simon	0:350011bf8be7	349	/*
simon	0:350011bf8be7	350	* lcp_lowerup - The lower layer is up.
simon	0:350011bf8be7	351	*/
simon	0:350011bf8be7	352	void
simon	0:350011bf8be7	353	lcp_lowerup(int unit)
simon	0:350011bf8be7	354	{
simon	0:350011bf8be7	355	lcp_options *wo = &lcp_wantoptions[unit];
simon	0:350011bf8be7	356
simon	0:350011bf8be7	357	/*
simon	0:350011bf8be7	358	* Don't use A/C or protocol compression on transmission,
simon	0:350011bf8be7	359	* but accept A/C and protocol compressed packets
simon	0:350011bf8be7	360	* if we are going to ask for A/C and protocol compression.
simon	0:350011bf8be7	361	*/
simon	0:350011bf8be7	362	ppp_set_xaccm(unit, &xmit_accm[unit]);
simon	0:350011bf8be7	363	ppp_send_config(unit, PPP_MRU, 0xffffffffl, 0, 0);
simon	0:350011bf8be7	364	ppp_recv_config(unit, PPP_MRU, 0x00000000l,
simon	0:350011bf8be7	365	wo->neg_pcompression, wo->neg_accompression);
simon	0:350011bf8be7	366	peer_mru[unit] = PPP_MRU;
simon	0:350011bf8be7	367	lcp_allowoptions[unit].asyncmap = (u_long)xmit_accm[unit][0]
simon	0:350011bf8be7	368	\| ((u_long)xmit_accm[unit][1] << 8)
simon	0:350011bf8be7	369	\| ((u_long)xmit_accm[unit][2] << 16)
simon	0:350011bf8be7	370	\| ((u_long)xmit_accm[unit][3] << 24);
simon	0:350011bf8be7	371	LCPDEBUG(LOG_INFO, ("lcp_lowerup: asyncmap=%X %X %X %X\n",
simon	0:350011bf8be7	372	xmit_accm[unit][3],
simon	0:350011bf8be7	373	xmit_accm[unit][2],
simon	0:350011bf8be7	374	xmit_accm[unit][1],
simon	0:350011bf8be7	375	xmit_accm[unit][0]));
simon	0:350011bf8be7	376
simon	0:350011bf8be7	377	fsm_lowerup(&lcp_fsm[unit]);
simon	0:350011bf8be7	378	}
simon	0:350011bf8be7	379
simon	0:350011bf8be7	380
simon	0:350011bf8be7	381	/*
simon	0:350011bf8be7	382	* lcp_lowerdown - The lower layer is down.
simon	0:350011bf8be7	383	*/
simon	0:350011bf8be7	384	void
simon	0:350011bf8be7	385	lcp_lowerdown(int unit)
simon	0:350011bf8be7	386	{
simon	0:350011bf8be7	387	fsm_lowerdown(&lcp_fsm[unit]);
simon	0:350011bf8be7	388	}
simon	0:350011bf8be7	389
simon	0:350011bf8be7	390
simon	0:350011bf8be7	391	/*
simon	0:350011bf8be7	392	* lcp_input - Input LCP packet.
simon	0:350011bf8be7	393	*/
simon	0:350011bf8be7	394	static void
simon	0:350011bf8be7	395	lcp_input(int unit, u_char *p, int len)
simon	0:350011bf8be7	396	{
simon	0:350011bf8be7	397	fsm *f = &lcp_fsm[unit];
simon	0:350011bf8be7	398
simon	0:350011bf8be7	399	fsm_input(f, p, len);
simon	0:350011bf8be7	400	}
simon	0:350011bf8be7	401
simon	0:350011bf8be7	402
simon	0:350011bf8be7	403	/*
simon	0:350011bf8be7	404	* lcp_extcode - Handle a LCP-specific code.
simon	0:350011bf8be7	405	*/
simon	0:350011bf8be7	406	static int
simon	0:350011bf8be7	407	lcp_extcode(fsm f, int code, u_char id, u_char inp, int len)
simon	0:350011bf8be7	408	{
simon	0:350011bf8be7	409	u_char *magp;
simon	0:350011bf8be7	410
simon	0:350011bf8be7	411	switch( code ){
simon	0:350011bf8be7	412	case PROTREJ:
simon	0:350011bf8be7	413	lcp_rprotrej(f, inp, len);
simon	0:350011bf8be7	414	break;
simon	0:350011bf8be7	415
simon	0:350011bf8be7	416	case ECHOREQ:
simon	0:350011bf8be7	417	if (f->state != LS_OPENED) {
simon	0:350011bf8be7	418	break;
simon	0:350011bf8be7	419	}
simon	0:350011bf8be7	420	LCPDEBUG(LOG_INFO, ("lcp: Echo-Request, Rcvd id %d\n", id));
simon	0:350011bf8be7	421	magp = inp;
simon	0:350011bf8be7	422	PUTLONG(lcp_gotoptions[f->unit].magicnumber, magp);
simon	0:350011bf8be7	423	fsm_sdata(f, ECHOREP, id, inp, len);
simon	0:350011bf8be7	424	break;
simon	0:350011bf8be7	425
simon	0:350011bf8be7	426	case ECHOREP:
simon	0:350011bf8be7	427	lcp_received_echo_reply(f, id, inp, len);
simon	0:350011bf8be7	428	break;
simon	0:350011bf8be7	429
simon	0:350011bf8be7	430	case DISCREQ:
simon	0:350011bf8be7	431	break;
simon	0:350011bf8be7	432
simon	0:350011bf8be7	433	default:
simon	0:350011bf8be7	434	return 0;
simon	0:350011bf8be7	435	}
simon	0:350011bf8be7	436	return 1;
simon	0:350011bf8be7	437	}
simon	0:350011bf8be7	438
simon	0:350011bf8be7	439
simon	0:350011bf8be7	440	/*
simon	0:350011bf8be7	441	* lcp_rprotrej - Receive an Protocol-Reject.
simon	0:350011bf8be7	442	*
simon	0:350011bf8be7	443	* Figure out which protocol is rejected and inform it.
simon	0:350011bf8be7	444	*/
simon	0:350011bf8be7	445	static void
simon	0:350011bf8be7	446	lcp_rprotrej(fsm f, u_char inp, int len)
simon	0:350011bf8be7	447	{
simon	0:350011bf8be7	448	int i;
simon	0:350011bf8be7	449	struct protent *protp;
simon	0:350011bf8be7	450	u_short prot;
simon	0:350011bf8be7	451
simon	0:350011bf8be7	452	if (len < (int)sizeof (u_short)) {
simon	0:350011bf8be7	453	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd short Protocol-Reject packet!\n"));
simon	0:350011bf8be7	454	return;
simon	0:350011bf8be7	455	}
simon	0:350011bf8be7	456
simon	0:350011bf8be7	457	GETSHORT(prot, inp);
simon	0:350011bf8be7	458
simon	0:350011bf8be7	459	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd Protocol-Reject packet for %x!\n", prot));
simon	0:350011bf8be7	460
simon	0:350011bf8be7	461	/*
simon	0:350011bf8be7	462	* Protocol-Reject packets received in any state other than the LCP
simon	0:350011bf8be7	463	* LS_OPENED state SHOULD be silently discarded.
simon	0:350011bf8be7	464	*/
simon	0:350011bf8be7	465	if( f->state != LS_OPENED ) {
simon	0:350011bf8be7	466	LCPDEBUG(LOG_INFO, ("Protocol-Reject discarded: LCP in state %d\n", f->state));
simon	0:350011bf8be7	467	return;
simon	0:350011bf8be7	468	}
simon	0:350011bf8be7	469
simon	0:350011bf8be7	470	/*
simon	0:350011bf8be7	471	* Upcall the proper Protocol-Reject routine.
simon	0:350011bf8be7	472	*/
simon	0:350011bf8be7	473	for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
simon	0:350011bf8be7	474	if (protp->protocol == prot && protp->enabled_flag) {
simon	0:350011bf8be7	475	(*protp->protrej)(f->unit);
simon	0:350011bf8be7	476	return;
simon	0:350011bf8be7	477	}
simon	0:350011bf8be7	478	}
simon	0:350011bf8be7	479
simon	0:350011bf8be7	480	LCPDEBUG(LOG_WARNING, ("Protocol-Reject for unsupported protocol 0x%x\n", prot));
simon	0:350011bf8be7	481	}
simon	0:350011bf8be7	482
simon	0:350011bf8be7	483
simon	0:350011bf8be7	484	/*
simon	0:350011bf8be7	485	* lcp_protrej - A Protocol-Reject was received.
simon	0:350011bf8be7	486	*/
simon	0:350011bf8be7	487	static void
simon	0:350011bf8be7	488	lcp_protrej(int unit)
simon	0:350011bf8be7	489	{
simon	0:350011bf8be7	490	LWIP_UNUSED_ARG(unit);
simon	0:350011bf8be7	491	/*
simon	0:350011bf8be7	492	* Can't reject LCP!
simon	0:350011bf8be7	493	*/
simon	0:350011bf8be7	494	LCPDEBUG(LOG_WARNING, ("lcp_protrej: Received Protocol-Reject for LCP!\n"));
simon	0:350011bf8be7	495	fsm_protreject(&lcp_fsm[unit]);
simon	0:350011bf8be7	496	}
simon	0:350011bf8be7	497
simon	0:350011bf8be7	498
simon	0:350011bf8be7	499	/*
simon	0:350011bf8be7	500	* lcp_sprotrej - Send a Protocol-Reject for some protocol.
simon	0:350011bf8be7	501	*/
simon	0:350011bf8be7	502	void
simon	0:350011bf8be7	503	lcp_sprotrej(int unit, u_char *p, int len)
simon	0:350011bf8be7	504	{
simon	0:350011bf8be7	505	/*
simon	0:350011bf8be7	506	* Send back the protocol and the information field of the
simon	0:350011bf8be7	507	* rejected packet. We only get here if LCP is in the LS_OPENED state.
simon	0:350011bf8be7	508	*/
simon	0:350011bf8be7	509
simon	0:350011bf8be7	510	fsm_sdata(&lcp_fsm[unit], PROTREJ, ++lcp_fsm[unit].id, p, len);
simon	0:350011bf8be7	511	}
simon	0:350011bf8be7	512
simon	0:350011bf8be7	513
simon	0:350011bf8be7	514	/*
simon	0:350011bf8be7	515	* lcp_resetci - Reset our CI.
simon	0:350011bf8be7	516	*/
simon	0:350011bf8be7	517	static void
simon	0:350011bf8be7	518	lcp_resetci(fsm *f)
simon	0:350011bf8be7	519	{
simon	0:350011bf8be7	520	lcp_wantoptions[f->unit].magicnumber = magic();
simon	0:350011bf8be7	521	lcp_wantoptions[f->unit].numloops = 0;
simon	0:350011bf8be7	522	lcp_gotoptions[f->unit] = lcp_wantoptions[f->unit];
simon	0:350011bf8be7	523	peer_mru[f->unit] = PPP_MRU;
simon	0:350011bf8be7	524	auth_reset(f->unit);
simon	0:350011bf8be7	525	}
simon	0:350011bf8be7	526
simon	0:350011bf8be7	527
simon	0:350011bf8be7	528	/*
simon	0:350011bf8be7	529	* lcp_cilen - Return length of our CI.
simon	0:350011bf8be7	530	*/
simon	0:350011bf8be7	531	static int
simon	0:350011bf8be7	532	lcp_cilen(fsm *f)
simon	0:350011bf8be7	533	{
simon	0:350011bf8be7	534	lcp_options *go = &lcp_gotoptions[f->unit];
simon	0:350011bf8be7	535
simon	0:350011bf8be7	536	#define LENCIVOID(neg) ((neg) ? CILEN_VOID : 0)
simon	0:350011bf8be7	537	#define LENCICHAP(neg) ((neg) ? CILEN_CHAP : 0)
simon	0:350011bf8be7	538	#define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0)
simon	0:350011bf8be7	539	#define LENCILONG(neg) ((neg) ? CILEN_LONG : 0)
simon	0:350011bf8be7	540	#define LENCILQR(neg) ((neg) ? CILEN_LQR: 0)
simon	0:350011bf8be7	541	#define LENCICBCP(neg) ((neg) ? CILEN_CBCP: 0)
simon	0:350011bf8be7	542	/*
simon	0:350011bf8be7	543	* NB: we only ask for one of CHAP and UPAP, even if we will
simon	0:350011bf8be7	544	* accept either.
simon	0:350011bf8be7	545	*/
simon	0:350011bf8be7	546	return (LENCISHORT(go->neg_mru && go->mru != PPP_DEFMRU) +
simon	0:350011bf8be7	547	LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) +
simon	0:350011bf8be7	548	LENCICHAP(go->neg_chap) +
simon	0:350011bf8be7	549	LENCISHORT(!go->neg_chap && go->neg_upap) +
simon	0:350011bf8be7	550	LENCILQR(go->neg_lqr) +
simon	0:350011bf8be7	551	LENCICBCP(go->neg_cbcp) +
simon	0:350011bf8be7	552	LENCILONG(go->neg_magicnumber) +
simon	0:350011bf8be7	553	LENCIVOID(go->neg_pcompression) +
simon	0:350011bf8be7	554	LENCIVOID(go->neg_accompression));
simon	0:350011bf8be7	555	}
simon	0:350011bf8be7	556
simon	0:350011bf8be7	557
simon	0:350011bf8be7	558	/*
simon	0:350011bf8be7	559	* lcp_addci - Add our desired CIs to a packet.
simon	0:350011bf8be7	560	*/
simon	0:350011bf8be7	561	static void
simon	0:350011bf8be7	562	lcp_addci(fsm f, u_char ucp, int *lenp)
simon	0:350011bf8be7	563	{
simon	0:350011bf8be7	564	lcp_options *go = &lcp_gotoptions[f->unit];
simon	0:350011bf8be7	565	u_char *start_ucp = ucp;
simon	0:350011bf8be7	566
simon	0:350011bf8be7	567	#define ADDCIVOID(opt, neg) \
simon	0:350011bf8be7	568	if (neg) { \
simon	0:350011bf8be7	569	LCPDEBUG(LOG_INFO, ("lcp_addci: opt=%d\n", opt)); \
simon	0:350011bf8be7	570	PUTCHAR(opt, ucp); \
simon	0:350011bf8be7	571	PUTCHAR(CILEN_VOID, ucp); \
simon	0:350011bf8be7	572	}
simon	0:350011bf8be7	573	#define ADDCISHORT(opt, neg, val) \
simon	0:350011bf8be7	574	if (neg) { \
simon	0:350011bf8be7	575	LCPDEBUG(LOG_INFO, ("lcp_addci: INT opt=%d %X\n", opt, val)); \
simon	0:350011bf8be7	576	PUTCHAR(opt, ucp); \
simon	0:350011bf8be7	577	PUTCHAR(CILEN_SHORT, ucp); \
simon	0:350011bf8be7	578	PUTSHORT(val, ucp); \
simon	0:350011bf8be7	579	}
simon	0:350011bf8be7	580	#define ADDCICHAP(opt, neg, val, digest) \
simon	0:350011bf8be7	581	if (neg) { \
simon	0:350011bf8be7	582	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAP opt=%d %X\n", opt, val)); \
simon	0:350011bf8be7	583	PUTCHAR(opt, ucp); \
simon	0:350011bf8be7	584	PUTCHAR(CILEN_CHAP, ucp); \
simon	0:350011bf8be7	585	PUTSHORT(val, ucp); \
simon	0:350011bf8be7	586	PUTCHAR(digest, ucp); \
simon	0:350011bf8be7	587	}
simon	0:350011bf8be7	588	#define ADDCILONG(opt, neg, val) \
simon	0:350011bf8be7	589	if (neg) { \
simon	0:350011bf8be7	590	LCPDEBUG(LOG_INFO, ("lcp_addci: L opt=%d %lX\n", opt, val)); \
simon	0:350011bf8be7	591	PUTCHAR(opt, ucp); \
simon	0:350011bf8be7	592	PUTCHAR(CILEN_LONG, ucp); \
simon	0:350011bf8be7	593	PUTLONG(val, ucp); \
simon	0:350011bf8be7	594	}
simon	0:350011bf8be7	595	#define ADDCILQR(opt, neg, val) \
simon	0:350011bf8be7	596	if (neg) { \
simon	0:350011bf8be7	597	LCPDEBUG(LOG_INFO, ("lcp_addci: LQR opt=%d %lX\n", opt, val)); \
simon	0:350011bf8be7	598	PUTCHAR(opt, ucp); \
simon	0:350011bf8be7	599	PUTCHAR(CILEN_LQR, ucp); \
simon	0:350011bf8be7	600	PUTSHORT(PPP_LQR, ucp); \
simon	0:350011bf8be7	601	PUTLONG(val, ucp); \
simon	0:350011bf8be7	602	}
simon	0:350011bf8be7	603	#define ADDCICHAR(opt, neg, val) \
simon	0:350011bf8be7	604	if (neg) { \
simon	0:350011bf8be7	605	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAR opt=%d %X '%z'\n", opt, val, val)); \
simon	0:350011bf8be7	606	PUTCHAR(opt, ucp); \
simon	0:350011bf8be7	607	PUTCHAR(CILEN_CHAR, ucp); \
simon	0:350011bf8be7	608	PUTCHAR(val, ucp); \
simon	0:350011bf8be7	609	}
simon	0:350011bf8be7	610
simon	0:350011bf8be7	611	ADDCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
simon	0:350011bf8be7	612	ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
simon	0:350011bf8be7	613	ADDCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
simon	0:350011bf8be7	614	ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
simon	0:350011bf8be7	615	ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
simon	0:350011bf8be7	616	ADDCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
simon	0:350011bf8be7	617	ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
simon	0:350011bf8be7	618	ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
simon	0:350011bf8be7	619	ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
simon	0:350011bf8be7	620
simon	0:350011bf8be7	621	if (ucp - start_ucp != *lenp) {
simon	0:350011bf8be7	622	/* this should never happen, because peer_mtu should be 1500 */
simon	0:350011bf8be7	623	LCPDEBUG(LOG_ERR, ("Bug in lcp_addci: wrong length\n"));
simon	0:350011bf8be7	624	}
simon	0:350011bf8be7	625	}
simon	0:350011bf8be7	626
simon	0:350011bf8be7	627
simon	0:350011bf8be7	628	/*
simon	0:350011bf8be7	629	* lcp_ackci - Ack our CIs.
simon	0:350011bf8be7	630	* This should not modify any state if the Ack is bad.
simon	0:350011bf8be7	631	*
simon	0:350011bf8be7	632	* Returns:
simon	0:350011bf8be7	633	* 0 - Ack was bad.
simon	0:350011bf8be7	634	* 1 - Ack was good.
simon	0:350011bf8be7	635	*/
simon	0:350011bf8be7	636	static int
simon	0:350011bf8be7	637	lcp_ackci(fsm f, u_char p, int len)
simon	0:350011bf8be7	638	{
simon	0:350011bf8be7	639	lcp_options *go = &lcp_gotoptions[f->unit];
simon	0:350011bf8be7	640	u_char cilen, citype, cichar;
simon	0:350011bf8be7	641	u_short cishort;
simon	0:350011bf8be7	642	u32_t cilong;
simon	0:350011bf8be7	643
simon	0:350011bf8be7	644	/*
simon	0:350011bf8be7	645	* CIs must be in exactly the same order that we sent.
simon	0:350011bf8be7	646	* Check packet length and CI length at each step.
simon	0:350011bf8be7	647	* If we find any deviations, then this packet is bad.
simon	0:350011bf8be7	648	*/
simon	0:350011bf8be7	649	#define ACKCIVOID(opt, neg) \
simon	0:350011bf8be7	650	if (neg) { \
simon	0:350011bf8be7	651	if ((len -= CILEN_VOID) < 0) \
simon	0:350011bf8be7	652	goto bad; \
simon	0:350011bf8be7	653	GETCHAR(citype, p); \
simon	0:350011bf8be7	654	GETCHAR(cilen, p); \
simon	0:350011bf8be7	655	if (cilen != CILEN_VOID \|\| citype != opt) \
simon	0:350011bf8be7	656	goto bad; \
simon	0:350011bf8be7	657	}
simon	0:350011bf8be7	658	#define ACKCISHORT(opt, neg, val) \
simon	0:350011bf8be7	659	if (neg) { \
simon	0:350011bf8be7	660	if ((len -= CILEN_SHORT) < 0) \
simon	0:350011bf8be7	661	goto bad; \
simon	0:350011bf8be7	662	GETCHAR(citype, p); \
simon	0:350011bf8be7	663	GETCHAR(cilen, p); \
simon	0:350011bf8be7	664	if (cilen != CILEN_SHORT \|\| citype != opt) \
simon	0:350011bf8be7	665	goto bad; \
simon	0:350011bf8be7	666	GETSHORT(cishort, p); \
simon	0:350011bf8be7	667	if (cishort != val) \
simon	0:350011bf8be7	668	goto bad; \
simon	0:350011bf8be7	669	}
simon	0:350011bf8be7	670	#define ACKCICHAR(opt, neg, val) \
simon	0:350011bf8be7	671	if (neg) { \
simon	0:350011bf8be7	672	if ((len -= CILEN_CHAR) < 0) \
simon	0:350011bf8be7	673	goto bad; \
simon	0:350011bf8be7	674	GETCHAR(citype, p); \
simon	0:350011bf8be7	675	GETCHAR(cilen, p); \
simon	0:350011bf8be7	676	if (cilen != CILEN_CHAR \|\| citype != opt) \
simon	0:350011bf8be7	677	goto bad; \
simon	0:350011bf8be7	678	GETCHAR(cichar, p); \
simon	0:350011bf8be7	679	if (cichar != val) \
simon	0:350011bf8be7	680	goto bad; \
simon	0:350011bf8be7	681	}
simon	0:350011bf8be7	682	#define ACKCICHAP(opt, neg, val, digest) \
simon	0:350011bf8be7	683	if (neg) { \
simon	0:350011bf8be7	684	if ((len -= CILEN_CHAP) < 0) \
simon	0:350011bf8be7	685	goto bad; \
simon	0:350011bf8be7	686	GETCHAR(citype, p); \
simon	0:350011bf8be7	687	GETCHAR(cilen, p); \
simon	0:350011bf8be7	688	if (cilen != CILEN_CHAP \|\| citype != opt) \
simon	0:350011bf8be7	689	goto bad; \
simon	0:350011bf8be7	690	GETSHORT(cishort, p); \
simon	0:350011bf8be7	691	if (cishort != val) \
simon	0:350011bf8be7	692	goto bad; \
simon	0:350011bf8be7	693	GETCHAR(cichar, p); \
simon	0:350011bf8be7	694	if (cichar != digest) \
simon	0:350011bf8be7	695	goto bad; \
simon	0:350011bf8be7	696	}
simon	0:350011bf8be7	697	#define ACKCILONG(opt, neg, val) \
simon	0:350011bf8be7	698	if (neg) { \
simon	0:350011bf8be7	699	if ((len -= CILEN_LONG) < 0) \
simon	0:350011bf8be7	700	goto bad; \
simon	0:350011bf8be7	701	GETCHAR(citype, p); \
simon	0:350011bf8be7	702	GETCHAR(cilen, p); \
simon	0:350011bf8be7	703	if (cilen != CILEN_LONG \|\| citype != opt) \
simon	0:350011bf8be7	704	goto bad; \
simon	0:350011bf8be7	705	GETLONG(cilong, p); \
simon	0:350011bf8be7	706	if (cilong != val) \
simon	0:350011bf8be7	707	goto bad; \
simon	0:350011bf8be7	708	}
simon	0:350011bf8be7	709	#define ACKCILQR(opt, neg, val) \
simon	0:350011bf8be7	710	if (neg) { \
simon	0:350011bf8be7	711	if ((len -= CILEN_LQR) < 0) \
simon	0:350011bf8be7	712	goto bad; \
simon	0:350011bf8be7	713	GETCHAR(citype, p); \
simon	0:350011bf8be7	714	GETCHAR(cilen, p); \
simon	0:350011bf8be7	715	if (cilen != CILEN_LQR \|\| citype != opt) \
simon	0:350011bf8be7	716	goto bad; \
simon	0:350011bf8be7	717	GETSHORT(cishort, p); \
simon	0:350011bf8be7	718	if (cishort != PPP_LQR) \
simon	0:350011bf8be7	719	goto bad; \
simon	0:350011bf8be7	720	GETLONG(cilong, p); \
simon	0:350011bf8be7	721	if (cilong != val) \
simon	0:350011bf8be7	722	goto bad; \
simon	0:350011bf8be7	723	}
simon	0:350011bf8be7	724
simon	0:350011bf8be7	725	ACKCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
simon	0:350011bf8be7	726	ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
simon	0:350011bf8be7	727	ACKCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
simon	0:350011bf8be7	728	ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
simon	0:350011bf8be7	729	ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
simon	0:350011bf8be7	730	ACKCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
simon	0:350011bf8be7	731	ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
simon	0:350011bf8be7	732	ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
simon	0:350011bf8be7	733	ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
simon	0:350011bf8be7	734
simon	0:350011bf8be7	735	/*
simon	0:350011bf8be7	736	* If there are any remaining CIs, then this packet is bad.
simon	0:350011bf8be7	737	*/
simon	0:350011bf8be7	738	if (len != 0) {
simon	0:350011bf8be7	739	goto bad;
simon	0:350011bf8be7	740	}
simon	0:350011bf8be7	741	LCPDEBUG(LOG_INFO, ("lcp_acki: Ack\n"));
simon	0:350011bf8be7	742	return (1);
simon	0:350011bf8be7	743	bad:
simon	0:350011bf8be7	744	LCPDEBUG(LOG_WARNING, ("lcp_acki: received bad Ack!\n"));
simon	0:350011bf8be7	745	return (0);
simon	0:350011bf8be7	746	}
simon	0:350011bf8be7	747
simon	0:350011bf8be7	748
simon	0:350011bf8be7	749	/*
simon	0:350011bf8be7	750	* lcp_nakci - Peer has sent a NAK for some of our CIs.
simon	0:350011bf8be7	751	* This should not modify any state if the Nak is bad
simon	0:350011bf8be7	752	* or if LCP is in the LS_OPENED state.
simon	0:350011bf8be7	753	*
simon	0:350011bf8be7	754	* Returns:
simon	0:350011bf8be7	755	* 0 - Nak was bad.
simon	0:350011bf8be7	756	* 1 - Nak was good.
simon	0:350011bf8be7	757	*/
simon	0:350011bf8be7	758	static int
simon	0:350011bf8be7	759	lcp_nakci(fsm f, u_char p, int len)
simon	0:350011bf8be7	760	{
simon	0:350011bf8be7	761	lcp_options *go = &lcp_gotoptions[f->unit];
simon	0:350011bf8be7	762	lcp_options *wo = &lcp_wantoptions[f->unit];
simon	0:350011bf8be7	763	u_char citype, cichar, *next;
simon	0:350011bf8be7	764	u_short cishort;
simon	0:350011bf8be7	765	u32_t cilong;
simon	0:350011bf8be7	766	lcp_options no; /* options we've seen Naks for */
simon	0:350011bf8be7	767	lcp_options try; /* options to request next time */
simon	0:350011bf8be7	768	int looped_back = 0;
simon	0:350011bf8be7	769	int cilen;
simon	0:350011bf8be7	770
simon	0:350011bf8be7	771	BZERO(&no, sizeof(no));
simon	0:350011bf8be7	772	try = *go;
simon	0:350011bf8be7	773
simon	0:350011bf8be7	774	/*
simon	0:350011bf8be7	775	* Any Nak'd CIs must be in exactly the same order that we sent.
simon	0:350011bf8be7	776	* Check packet length and CI length at each step.
simon	0:350011bf8be7	777	* If we find any deviations, then this packet is bad.
simon	0:350011bf8be7	778	*/
simon	0:350011bf8be7	779	#define NAKCIVOID(opt, neg, code) \
simon	0:350011bf8be7	780	if (go->neg && \
simon	0:350011bf8be7	781	len >= CILEN_VOID && \
simon	0:350011bf8be7	782	p[1] == CILEN_VOID && \
simon	0:350011bf8be7	783	p[0] == opt) { \
simon	0:350011bf8be7	784	len -= CILEN_VOID; \
simon	0:350011bf8be7	785	INCPTR(CILEN_VOID, p); \
simon	0:350011bf8be7	786	no.neg = 1; \
simon	0:350011bf8be7	787	code \
simon	0:350011bf8be7	788	}
simon	0:350011bf8be7	789	#define NAKCICHAP(opt, neg, code) \
simon	0:350011bf8be7	790	if (go->neg && \
simon	0:350011bf8be7	791	len >= CILEN_CHAP && \
simon	0:350011bf8be7	792	p[1] == CILEN_CHAP && \
simon	0:350011bf8be7	793	p[0] == opt) { \
simon	0:350011bf8be7	794	len -= CILEN_CHAP; \
simon	0:350011bf8be7	795	INCPTR(2, p); \
simon	0:350011bf8be7	796	GETSHORT(cishort, p); \
simon	0:350011bf8be7	797	GETCHAR(cichar, p); \
simon	0:350011bf8be7	798	no.neg = 1; \
simon	0:350011bf8be7	799	code \
simon	0:350011bf8be7	800	}
simon	0:350011bf8be7	801	#define NAKCICHAR(opt, neg, code) \
simon	0:350011bf8be7	802	if (go->neg && \
simon	0:350011bf8be7	803	len >= CILEN_CHAR && \
simon	0:350011bf8be7	804	p[1] == CILEN_CHAR && \
simon	0:350011bf8be7	805	p[0] == opt) { \
simon	0:350011bf8be7	806	len -= CILEN_CHAR; \
simon	0:350011bf8be7	807	INCPTR(2, p); \
simon	0:350011bf8be7	808	GETCHAR(cichar, p); \
simon	0:350011bf8be7	809	no.neg = 1; \
simon	0:350011bf8be7	810	code \
simon	0:350011bf8be7	811	}
simon	0:350011bf8be7	812	#define NAKCISHORT(opt, neg, code) \
simon	0:350011bf8be7	813	if (go->neg && \
simon	0:350011bf8be7	814	len >= CILEN_SHORT && \
simon	0:350011bf8be7	815	p[1] == CILEN_SHORT && \
simon	0:350011bf8be7	816	p[0] == opt) { \
simon	0:350011bf8be7	817	len -= CILEN_SHORT; \
simon	0:350011bf8be7	818	INCPTR(2, p); \
simon	0:350011bf8be7	819	GETSHORT(cishort, p); \
simon	0:350011bf8be7	820	no.neg = 1; \
simon	0:350011bf8be7	821	code \
simon	0:350011bf8be7	822	}
simon	0:350011bf8be7	823	#define NAKCILONG(opt, neg, code) \
simon	0:350011bf8be7	824	if (go->neg && \
simon	0:350011bf8be7	825	len >= CILEN_LONG && \
simon	0:350011bf8be7	826	p[1] == CILEN_LONG && \
simon	0:350011bf8be7	827	p[0] == opt) { \
simon	0:350011bf8be7	828	len -= CILEN_LONG; \
simon	0:350011bf8be7	829	INCPTR(2, p); \
simon	0:350011bf8be7	830	GETLONG(cilong, p); \
simon	0:350011bf8be7	831	no.neg = 1; \
simon	0:350011bf8be7	832	code \
simon	0:350011bf8be7	833	}
simon	0:350011bf8be7	834	#define NAKCILQR(opt, neg, code) \
simon	0:350011bf8be7	835	if (go->neg && \
simon	0:350011bf8be7	836	len >= CILEN_LQR && \
simon	0:350011bf8be7	837	p[1] == CILEN_LQR && \
simon	0:350011bf8be7	838	p[0] == opt) { \
simon	0:350011bf8be7	839	len -= CILEN_LQR; \
simon	0:350011bf8be7	840	INCPTR(2, p); \
simon	0:350011bf8be7	841	GETSHORT(cishort, p); \
simon	0:350011bf8be7	842	GETLONG(cilong, p); \
simon	0:350011bf8be7	843	no.neg = 1; \
simon	0:350011bf8be7	844	code \
simon	0:350011bf8be7	845	}
simon	0:350011bf8be7	846
simon	0:350011bf8be7	847	/*
simon	0:350011bf8be7	848	* We don't care if they want to send us smaller packets than
simon	0:350011bf8be7	849	* we want. Therefore, accept any MRU less than what we asked for,
simon	0:350011bf8be7	850	* but then ignore the new value when setting the MRU in the kernel.
simon	0:350011bf8be7	851	* If they send us a bigger MRU than what we asked, accept it, up to
simon	0:350011bf8be7	852	* the limit of the default MRU we'd get if we didn't negotiate.
simon	0:350011bf8be7	853	*/
simon	0:350011bf8be7	854	if (go->neg_mru && go->mru != PPP_DEFMRU) {
simon	0:350011bf8be7	855	NAKCISHORT(CI_MRU, neg_mru,
simon	0:350011bf8be7	856	if (cishort <= wo->mru \|\| cishort < PPP_DEFMRU) {
simon	0:350011bf8be7	857	try.mru = cishort;
simon	0:350011bf8be7	858	}
simon	0:350011bf8be7	859	);
simon	0:350011bf8be7	860	}
simon	0:350011bf8be7	861
simon	0:350011bf8be7	862	/*
simon	0:350011bf8be7	863	* Add any characters they want to our (receive-side) asyncmap.
simon	0:350011bf8be7	864	*/
simon	0:350011bf8be7	865	if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) {
simon	0:350011bf8be7	866	NAKCILONG(CI_ASYNCMAP, neg_asyncmap,
simon	0:350011bf8be7	867	try.asyncmap = go->asyncmap \| cilong;
simon	0:350011bf8be7	868	);
simon	0:350011bf8be7	869	}
simon	0:350011bf8be7	870
simon	0:350011bf8be7	871	/*
simon	0:350011bf8be7	872	* If they've nak'd our authentication-protocol, check whether
simon	0:350011bf8be7	873	* they are proposing a different protocol, or a different
simon	0:350011bf8be7	874	* hash algorithm for CHAP.
simon	0:350011bf8be7	875	*/
simon	0:350011bf8be7	876	if ((go->neg_chap \|\| go->neg_upap)
simon	0:350011bf8be7	877	&& len >= CILEN_SHORT
simon	0:350011bf8be7	878	&& p[0] == CI_AUTHTYPE && p[1] >= CILEN_SHORT && p[1] <= len) {
simon	0:350011bf8be7	879	cilen = p[1];
simon	0:350011bf8be7	880	len -= cilen;
simon	0:350011bf8be7	881	no.neg_chap = go->neg_chap;
simon	0:350011bf8be7	882	no.neg_upap = go->neg_upap;
simon	0:350011bf8be7	883	INCPTR(2, p);
simon	0:350011bf8be7	884	GETSHORT(cishort, p);
simon	0:350011bf8be7	885	if (cishort == PPP_PAP && cilen == CILEN_SHORT) {
simon	0:350011bf8be7	886	/*
simon	0:350011bf8be7	887	* If we were asking for CHAP, they obviously don't want to do it.
simon	0:350011bf8be7	888	* If we weren't asking for CHAP, then we were asking for PAP,
simon	0:350011bf8be7	889	* in which case this Nak is bad.
simon	0:350011bf8be7	890	*/
simon	0:350011bf8be7	891	if (!go->neg_chap) {
simon	0:350011bf8be7	892	goto bad;
simon	0:350011bf8be7	893	}
simon	0:350011bf8be7	894	try.neg_chap = 0;
simon	0:350011bf8be7	895
simon	0:350011bf8be7	896	} else if (cishort == PPP_CHAP && cilen == CILEN_CHAP) {
simon	0:350011bf8be7	897	GETCHAR(cichar, p);
simon	0:350011bf8be7	898	if (go->neg_chap) {
simon	0:350011bf8be7	899	/*
simon	0:350011bf8be7	900	* We were asking for CHAP/MD5; they must want a different
simon	0:350011bf8be7	901	* algorithm. If they can't do MD5, we'll have to stop
simon	0:350011bf8be7	902	* asking for CHAP.
simon	0:350011bf8be7	903	*/
simon	0:350011bf8be7	904	if (cichar != go->chap_mdtype) {
simon	0:350011bf8be7	905	try.neg_chap = 0;
simon	0:350011bf8be7	906	}
simon	0:350011bf8be7	907	} else {
simon	0:350011bf8be7	908	/*
simon	0:350011bf8be7	909	* Stop asking for PAP if we were asking for it.
simon	0:350011bf8be7	910	*/
simon	0:350011bf8be7	911	try.neg_upap = 0;
simon	0:350011bf8be7	912	}
simon	0:350011bf8be7	913
simon	0:350011bf8be7	914	} else {
simon	0:350011bf8be7	915	/*
simon	0:350011bf8be7	916	* We don't recognize what they're suggesting.
simon	0:350011bf8be7	917	* Stop asking for what we were asking for.
simon	0:350011bf8be7	918	*/
simon	0:350011bf8be7	919	if (go->neg_chap) {
simon	0:350011bf8be7	920	try.neg_chap = 0;
simon	0:350011bf8be7	921	} else {
simon	0:350011bf8be7	922	try.neg_upap = 0;
simon	0:350011bf8be7	923	}
simon	0:350011bf8be7	924	p += cilen - CILEN_SHORT;
simon	0:350011bf8be7	925	}
simon	0:350011bf8be7	926	}
simon	0:350011bf8be7	927
simon	0:350011bf8be7	928	/*
simon	0:350011bf8be7	929	* If they can't cope with our link quality protocol, we'll have
simon	0:350011bf8be7	930	* to stop asking for LQR. We haven't got any other protocol.
simon	0:350011bf8be7	931	* If they Nak the reporting period, take their value XXX ?
simon	0:350011bf8be7	932	*/
simon	0:350011bf8be7	933	NAKCILQR(CI_QUALITY, neg_lqr,
simon	0:350011bf8be7	934	if (cishort != PPP_LQR) {
simon	0:350011bf8be7	935	try.neg_lqr = 0;
simon	0:350011bf8be7	936	} else {
simon	0:350011bf8be7	937	try.lqr_period = cilong;
simon	0:350011bf8be7	938	}
simon	0:350011bf8be7	939	);
simon	0:350011bf8be7	940
simon	0:350011bf8be7	941	/*
simon	0:350011bf8be7	942	* Only implementing CBCP...not the rest of the callback options
simon	0:350011bf8be7	943	*/
simon	0:350011bf8be7	944	NAKCICHAR(CI_CALLBACK, neg_cbcp,
simon	0:350011bf8be7	945	try.neg_cbcp = 0;
simon	0:350011bf8be7	946	);
simon	0:350011bf8be7	947
simon	0:350011bf8be7	948	/*
simon	0:350011bf8be7	949	* Check for a looped-back line.
simon	0:350011bf8be7	950	*/
simon	0:350011bf8be7	951	NAKCILONG(CI_MAGICNUMBER, neg_magicnumber,
simon	0:350011bf8be7	952	try.magicnumber = magic();
simon	0:350011bf8be7	953	looped_back = 1;
simon	0:350011bf8be7	954	);
simon	0:350011bf8be7	955
simon	0:350011bf8be7	956	/*
simon	0:350011bf8be7	957	* Peer shouldn't send Nak for protocol compression or
simon	0:350011bf8be7	958	* address/control compression requests; they should send
simon	0:350011bf8be7	959	* a Reject instead. If they send a Nak, treat it as a Reject.
simon	0:350011bf8be7	960	*/
simon	0:350011bf8be7	961	NAKCIVOID(CI_PCOMPRESSION, neg_pcompression,
simon	0:350011bf8be7	962	try.neg_pcompression = 0;
simon	0:350011bf8be7	963	);
simon	0:350011bf8be7	964	NAKCIVOID(CI_ACCOMPRESSION, neg_accompression,
simon	0:350011bf8be7	965	try.neg_accompression = 0;
simon	0:350011bf8be7	966	);
simon	0:350011bf8be7	967
simon	0:350011bf8be7	968	/*
simon	0:350011bf8be7	969	* There may be remaining CIs, if the peer is requesting negotiation
simon	0:350011bf8be7	970	* on an option that we didn't include in our request packet.
simon	0:350011bf8be7	971	* If we see an option that we requested, or one we've already seen
simon	0:350011bf8be7	972	* in this packet, then this packet is bad.
simon	0:350011bf8be7	973	* If we wanted to respond by starting to negotiate on the requested
simon	0:350011bf8be7	974	* option(s), we could, but we don't, because except for the
simon	0:350011bf8be7	975	* authentication type and quality protocol, if we are not negotiating
simon	0:350011bf8be7	976	* an option, it is because we were told not to.
simon	0:350011bf8be7	977	* For the authentication type, the Nak from the peer means
simon	0:350011bf8be7	978	* `let me authenticate myself with you' which is a bit pointless.
simon	0:350011bf8be7	979	* For the quality protocol, the Nak means `ask me to send you quality
simon	0:350011bf8be7	980	* reports', but if we didn't ask for them, we don't want them.
simon	0:350011bf8be7	981	* An option we don't recognize represents the peer asking to
simon	0:350011bf8be7	982	* negotiate some option we don't support, so ignore it.
simon	0:350011bf8be7	983	*/
simon	0:350011bf8be7	984	while (len > CILEN_VOID) {
simon	0:350011bf8be7	985	GETCHAR(citype, p);
simon	0:350011bf8be7	986	GETCHAR(cilen, p);
simon	0:350011bf8be7	987	if (cilen < CILEN_VOID \|\| (len -= cilen) < 0) {
simon	0:350011bf8be7	988	goto bad;
simon	0:350011bf8be7	989	}
simon	0:350011bf8be7	990	next = p + cilen - 2;
simon	0:350011bf8be7	991
simon	0:350011bf8be7	992	switch (citype) {
simon	0:350011bf8be7	993	case CI_MRU:
simon	0:350011bf8be7	994	if ((go->neg_mru && go->mru != PPP_DEFMRU)
simon	0:350011bf8be7	995	\|\| no.neg_mru \|\| cilen != CILEN_SHORT) {
simon	0:350011bf8be7	996	goto bad;
simon	0:350011bf8be7	997	}
simon	0:350011bf8be7	998	GETSHORT(cishort, p);
simon	0:350011bf8be7	999	if (cishort < PPP_DEFMRU) {
simon	0:350011bf8be7	1000	try.mru = cishort;
simon	0:350011bf8be7	1001	}
simon	0:350011bf8be7	1002	break;
simon	0:350011bf8be7	1003	case CI_ASYNCMAP:
simon	0:350011bf8be7	1004	if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl)
simon	0:350011bf8be7	1005	\|\| no.neg_asyncmap \|\| cilen != CILEN_LONG) {
simon	0:350011bf8be7	1006	goto bad;
simon	0:350011bf8be7	1007	}
simon	0:350011bf8be7	1008	break;
simon	0:350011bf8be7	1009	case CI_AUTHTYPE:
simon	0:350011bf8be7	1010	if (go->neg_chap \|\| no.neg_chap \|\| go->neg_upap \|\| no.neg_upap) {
simon	0:350011bf8be7	1011	goto bad;
simon	0:350011bf8be7	1012	}
simon	0:350011bf8be7	1013	break;
simon	0:350011bf8be7	1014	case CI_MAGICNUMBER:
simon	0:350011bf8be7	1015	if (go->neg_magicnumber \|\| no.neg_magicnumber \|\|
simon	0:350011bf8be7	1016	cilen != CILEN_LONG) {
simon	0:350011bf8be7	1017	goto bad;
simon	0:350011bf8be7	1018	}
simon	0:350011bf8be7	1019	break;
simon	0:350011bf8be7	1020	case CI_PCOMPRESSION:
simon	0:350011bf8be7	1021	if (go->neg_pcompression \|\| no.neg_pcompression
simon	0:350011bf8be7	1022	\|\| cilen != CILEN_VOID) {
simon	0:350011bf8be7	1023	goto bad;
simon	0:350011bf8be7	1024	}
simon	0:350011bf8be7	1025	break;
simon	0:350011bf8be7	1026	case CI_ACCOMPRESSION:
simon	0:350011bf8be7	1027	if (go->neg_accompression \|\| no.neg_accompression
simon	0:350011bf8be7	1028	\|\| cilen != CILEN_VOID) {
simon	0:350011bf8be7	1029	goto bad;
simon	0:350011bf8be7	1030	}
simon	0:350011bf8be7	1031	break;
simon	0:350011bf8be7	1032	case CI_QUALITY:
simon	0:350011bf8be7	1033	if (go->neg_lqr \|\| no.neg_lqr \|\| cilen != CILEN_LQR) {
simon	0:350011bf8be7	1034	goto bad;
simon	0:350011bf8be7	1035	}
simon	0:350011bf8be7	1036	break;
simon	0:350011bf8be7	1037	}
simon	0:350011bf8be7	1038	p = next;
simon	0:350011bf8be7	1039	}
simon	0:350011bf8be7	1040
simon	0:350011bf8be7	1041	/* If there is still anything left, this packet is bad. */
simon	0:350011bf8be7	1042	if (len != 0) {
simon	0:350011bf8be7	1043	goto bad;
simon	0:350011bf8be7	1044	}
simon	0:350011bf8be7	1045
simon	0:350011bf8be7	1046	/*
simon	0:350011bf8be7	1047	* OK, the Nak is good. Now we can update state.
simon	0:350011bf8be7	1048	*/
simon	0:350011bf8be7	1049	if (f->state != LS_OPENED) {
simon	0:350011bf8be7	1050	if (looped_back) {
simon	0:350011bf8be7	1051	if (++try.numloops >= lcp_loopbackfail) {
simon	0:350011bf8be7	1052	LCPDEBUG(LOG_NOTICE, ("Serial line is looped back.\n"));
simon	0:350011bf8be7	1053	lcp_close(f->unit, "Loopback detected");
simon	0:350011bf8be7	1054	}
simon	0:350011bf8be7	1055	} else {
simon	0:350011bf8be7	1056	try.numloops = 0;
simon	0:350011bf8be7	1057	}
simon	0:350011bf8be7	1058	*go = try;
simon	0:350011bf8be7	1059	}
simon	0:350011bf8be7	1060
simon	0:350011bf8be7	1061	return 1;
simon	0:350011bf8be7	1062
simon	0:350011bf8be7	1063	bad:
simon	0:350011bf8be7	1064	LCPDEBUG(LOG_WARNING, ("lcp_nakci: received bad Nak!\n"));
simon	0:350011bf8be7	1065	return 0;
simon	0:350011bf8be7	1066	}
simon	0:350011bf8be7	1067
simon	0:350011bf8be7	1068
simon	0:350011bf8be7	1069	/*
simon	0:350011bf8be7	1070	* lcp_rejci - Peer has Rejected some of our CIs.
simon	0:350011bf8be7	1071	* This should not modify any state if the Reject is bad
simon	0:350011bf8be7	1072	* or if LCP is in the LS_OPENED state.
simon	0:350011bf8be7	1073	*
simon	0:350011bf8be7	1074	* Returns:
simon	0:350011bf8be7	1075	* 0 - Reject was bad.
simon	0:350011bf8be7	1076	* 1 - Reject was good.
simon	0:350011bf8be7	1077	*/
simon	0:350011bf8be7	1078	static int
simon	0:350011bf8be7	1079	lcp_rejci(fsm f, u_char p, int len)
simon	0:350011bf8be7	1080	{
simon	0:350011bf8be7	1081	lcp_options *go = &lcp_gotoptions[f->unit];
simon	0:350011bf8be7	1082	u_char cichar;
simon	0:350011bf8be7	1083	u_short cishort;
simon	0:350011bf8be7	1084	u32_t cilong;
simon	0:350011bf8be7	1085	lcp_options try; /* options to request next time */
simon	0:350011bf8be7	1086
simon	0:350011bf8be7	1087	try = *go;
simon	0:350011bf8be7	1088
simon	0:350011bf8be7	1089	/*
simon	0:350011bf8be7	1090	* Any Rejected CIs must be in exactly the same order that we sent.
simon	0:350011bf8be7	1091	* Check packet length and CI length at each step.
simon	0:350011bf8be7	1092	* If we find any deviations, then this packet is bad.
simon	0:350011bf8be7	1093	*/
simon	0:350011bf8be7	1094	#define REJCIVOID(opt, neg) \
simon	0:350011bf8be7	1095	if (go->neg && \
simon	0:350011bf8be7	1096	len >= CILEN_VOID && \
simon	0:350011bf8be7	1097	p[1] == CILEN_VOID && \
simon	0:350011bf8be7	1098	p[0] == opt) { \
simon	0:350011bf8be7	1099	len -= CILEN_VOID; \
simon	0:350011bf8be7	1100	INCPTR(CILEN_VOID, p); \
simon	0:350011bf8be7	1101	try.neg = 0; \
simon	0:350011bf8be7	1102	LCPDEBUG(LOG_INFO, ("lcp_rejci: void opt %d rejected\n", opt)); \
simon	0:350011bf8be7	1103	}
simon	0:350011bf8be7	1104	#define REJCISHORT(opt, neg, val) \
simon	0:350011bf8be7	1105	if (go->neg && \
simon	0:350011bf8be7	1106	len >= CILEN_SHORT && \
simon	0:350011bf8be7	1107	p[1] == CILEN_SHORT && \
simon	0:350011bf8be7	1108	p[0] == opt) { \
simon	0:350011bf8be7	1109	len -= CILEN_SHORT; \
simon	0:350011bf8be7	1110	INCPTR(2, p); \
simon	0:350011bf8be7	1111	GETSHORT(cishort, p); \
simon	0:350011bf8be7	1112	/* Check rejected value. */ \
simon	0:350011bf8be7	1113	if (cishort != val) { \
simon	0:350011bf8be7	1114	goto bad; \
simon	0:350011bf8be7	1115	} \
simon	0:350011bf8be7	1116	try.neg = 0; \
simon	0:350011bf8be7	1117	LCPDEBUG(LOG_INFO, ("lcp_rejci: short opt %d rejected\n", opt)); \
simon	0:350011bf8be7	1118	}
simon	0:350011bf8be7	1119	#define REJCICHAP(opt, neg, val, digest) \
simon	0:350011bf8be7	1120	if (go->neg && \
simon	0:350011bf8be7	1121	len >= CILEN_CHAP && \
simon	0:350011bf8be7	1122	p[1] == CILEN_CHAP && \
simon	0:350011bf8be7	1123	p[0] == opt) { \
simon	0:350011bf8be7	1124	len -= CILEN_CHAP; \
simon	0:350011bf8be7	1125	INCPTR(2, p); \
simon	0:350011bf8be7	1126	GETSHORT(cishort, p); \
simon	0:350011bf8be7	1127	GETCHAR(cichar, p); \
simon	0:350011bf8be7	1128	/* Check rejected value. */ \
simon	0:350011bf8be7	1129	if (cishort != val \|\| cichar != digest) { \
simon	0:350011bf8be7	1130	goto bad; \
simon	0:350011bf8be7	1131	} \
simon	0:350011bf8be7	1132	try.neg = 0; \
simon	0:350011bf8be7	1133	try.neg_upap = 0; \
simon	0:350011bf8be7	1134	LCPDEBUG(LOG_INFO, ("lcp_rejci: chap opt %d rejected\n", opt)); \
simon	0:350011bf8be7	1135	}
simon	0:350011bf8be7	1136	#define REJCILONG(opt, neg, val) \
simon	0:350011bf8be7	1137	if (go->neg && \
simon	0:350011bf8be7	1138	len >= CILEN_LONG && \
simon	0:350011bf8be7	1139	p[1] == CILEN_LONG && \
simon	0:350011bf8be7	1140	p[0] == opt) { \
simon	0:350011bf8be7	1141	len -= CILEN_LONG; \
simon	0:350011bf8be7	1142	INCPTR(2, p); \
simon	0:350011bf8be7	1143	GETLONG(cilong, p); \
simon	0:350011bf8be7	1144	/* Check rejected value. */ \
simon	0:350011bf8be7	1145	if (cilong != val) { \
simon	0:350011bf8be7	1146	goto bad; \
simon	0:350011bf8be7	1147	} \
simon	0:350011bf8be7	1148	try.neg = 0; \
simon	0:350011bf8be7	1149	LCPDEBUG(LOG_INFO, ("lcp_rejci: long opt %d rejected\n", opt)); \
simon	0:350011bf8be7	1150	}
simon	0:350011bf8be7	1151	#define REJCILQR(opt, neg, val) \
simon	0:350011bf8be7	1152	if (go->neg && \
simon	0:350011bf8be7	1153	len >= CILEN_LQR && \
simon	0:350011bf8be7	1154	p[1] == CILEN_LQR && \
simon	0:350011bf8be7	1155	p[0] == opt) { \
simon	0:350011bf8be7	1156	len -= CILEN_LQR; \
simon	0:350011bf8be7	1157	INCPTR(2, p); \
simon	0:350011bf8be7	1158	GETSHORT(cishort, p); \
simon	0:350011bf8be7	1159	GETLONG(cilong, p); \
simon	0:350011bf8be7	1160	/* Check rejected value. */ \
simon	0:350011bf8be7	1161	if (cishort != PPP_LQR \|\| cilong != val) { \
simon	0:350011bf8be7	1162	goto bad; \
simon	0:350011bf8be7	1163	} \
simon	0:350011bf8be7	1164	try.neg = 0; \
simon	0:350011bf8be7	1165	LCPDEBUG(LOG_INFO, ("lcp_rejci: LQR opt %d rejected\n", opt)); \
simon	0:350011bf8be7	1166	}
simon	0:350011bf8be7	1167	#define REJCICBCP(opt, neg, val) \
simon	0:350011bf8be7	1168	if (go->neg && \
simon	0:350011bf8be7	1169	len >= CILEN_CBCP && \
simon	0:350011bf8be7	1170	p[1] == CILEN_CBCP && \
simon	0:350011bf8be7	1171	p[0] == opt) { \
simon	0:350011bf8be7	1172	len -= CILEN_CBCP; \
simon	0:350011bf8be7	1173	INCPTR(2, p); \
simon	0:350011bf8be7	1174	GETCHAR(cichar, p); \
simon	0:350011bf8be7	1175	/* Check rejected value. */ \
simon	0:350011bf8be7	1176	if (cichar != val) { \
simon	0:350011bf8be7	1177	goto bad; \
simon	0:350011bf8be7	1178	} \
simon	0:350011bf8be7	1179	try.neg = 0; \
simon	0:350011bf8be7	1180	LCPDEBUG(LOG_INFO, ("lcp_rejci: Callback opt %d rejected\n", opt)); \
simon	0:350011bf8be7	1181	}
simon	0:350011bf8be7	1182
simon	0:350011bf8be7	1183	REJCISHORT(CI_MRU, neg_mru, go->mru);
simon	0:350011bf8be7	1184	REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap);
simon	0:350011bf8be7	1185	REJCICHAP(CI_AUTHTYPE, neg_chap, PPP_CHAP, go->chap_mdtype);
simon	0:350011bf8be7	1186	if (!go->neg_chap) {
simon	0:350011bf8be7	1187	REJCISHORT(CI_AUTHTYPE, neg_upap, PPP_PAP);
simon	0:350011bf8be7	1188	}
simon	0:350011bf8be7	1189	REJCILQR(CI_QUALITY, neg_lqr, go->lqr_period);
simon	0:350011bf8be7	1190	REJCICBCP(CI_CALLBACK, neg_cbcp, CBCP_OPT);
simon	0:350011bf8be7	1191	REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber);
simon	0:350011bf8be7	1192	REJCIVOID(CI_PCOMPRESSION, neg_pcompression);
simon	0:350011bf8be7	1193	REJCIVOID(CI_ACCOMPRESSION, neg_accompression);
simon	0:350011bf8be7	1194
simon	0:350011bf8be7	1195	/*
simon	0:350011bf8be7	1196	* If there are any remaining CIs, then this packet is bad.
simon	0:350011bf8be7	1197	*/
simon	0:350011bf8be7	1198	if (len != 0) {
simon	0:350011bf8be7	1199	goto bad;
simon	0:350011bf8be7	1200	}
simon	0:350011bf8be7	1201	/*
simon	0:350011bf8be7	1202	* Now we can update state.
simon	0:350011bf8be7	1203	*/
simon	0:350011bf8be7	1204	if (f->state != LS_OPENED) {
simon	0:350011bf8be7	1205	*go = try;
simon	0:350011bf8be7	1206	}
simon	0:350011bf8be7	1207	return 1;
simon	0:350011bf8be7	1208
simon	0:350011bf8be7	1209	bad:
simon	0:350011bf8be7	1210	LCPDEBUG(LOG_WARNING, ("lcp_rejci: received bad Reject!\n"));
simon	0:350011bf8be7	1211	return 0;
simon	0:350011bf8be7	1212	}
simon	0:350011bf8be7	1213
simon	0:350011bf8be7	1214
simon	0:350011bf8be7	1215	/*
simon	0:350011bf8be7	1216	* lcp_reqci - Check the peer's requested CIs and send appropriate response.
simon	0:350011bf8be7	1217	*
simon	0:350011bf8be7	1218	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
simon	0:350011bf8be7	1219	* appropriately. If reject_if_disagree is non-zero, doesn't return
simon	0:350011bf8be7	1220	* CONFNAK; returns CONFREJ if it can't return CONFACK.
simon	0:350011bf8be7	1221	*/
simon	0:350011bf8be7	1222	static int
simon	0:350011bf8be7	1223	lcp_reqci(fsm *f,
simon	0:350011bf8be7	1224	u_char inp, / Requested CIs */
simon	0:350011bf8be7	1225	int lenp, / Length of requested CIs */
simon	0:350011bf8be7	1226	int reject_if_disagree)
simon	0:350011bf8be7	1227	{
simon	0:350011bf8be7	1228	lcp_options *go = &lcp_gotoptions[f->unit];
simon	0:350011bf8be7	1229	lcp_options *ho = &lcp_hisoptions[f->unit];
simon	0:350011bf8be7	1230	lcp_options *ao = &lcp_allowoptions[f->unit];
simon	0:350011bf8be7	1231	u_char cip, next; /* Pointer to current and next CIs */
simon	0:350011bf8be7	1232	int cilen, citype; /* Parsed len, type */
simon	0:350011bf8be7	1233	u_char cichar; /* Parsed char value */
simon	0:350011bf8be7	1234	u_short cishort; /* Parsed short value */
simon	0:350011bf8be7	1235	u32_t cilong; /* Parse long value */
simon	0:350011bf8be7	1236	int rc = CONFACK; /* Final packet return code */
simon	0:350011bf8be7	1237	int orc; /* Individual option return code */
simon	0:350011bf8be7	1238	u_char p; / Pointer to next char to parse */
simon	0:350011bf8be7	1239	u_char rejp; / Pointer to next char in reject frame */
simon	0:350011bf8be7	1240	u_char nakp; / Pointer to next char in Nak frame */
simon	0:350011bf8be7	1241	int l = lenp; / Length left */
simon	0:350011bf8be7	1242	#if TRACELCP > 0
simon	0:350011bf8be7	1243	char traceBuf[80];
simon	0:350011bf8be7	1244	size_t traceNdx = 0;
simon	0:350011bf8be7	1245	#endif
simon	0:350011bf8be7	1246
simon	0:350011bf8be7	1247	/*
simon	0:350011bf8be7	1248	* Reset all his options.
simon	0:350011bf8be7	1249	*/
simon	0:350011bf8be7	1250	BZERO(ho, sizeof(*ho));
simon	0:350011bf8be7	1251
simon	0:350011bf8be7	1252	/*
simon	0:350011bf8be7	1253	* Process all his options.
simon	0:350011bf8be7	1254	*/
simon	0:350011bf8be7	1255	next = inp;
simon	0:350011bf8be7	1256	nakp = nak_buffer;
simon	0:350011bf8be7	1257	rejp = inp;
simon	0:350011bf8be7	1258	while (l) {
simon	0:350011bf8be7	1259	orc = CONFACK; /* Assume success */
simon	0:350011bf8be7	1260	cip = p = next; /* Remember begining of CI */
simon	0:350011bf8be7	1261	if (l < 2 \|\| /* Not enough data for CI header or */
simon	0:350011bf8be7	1262	p[1] < 2 \|\| /* CI length too small or */
simon	0:350011bf8be7	1263	p[1] > l) { /* CI length too big? */
simon	0:350011bf8be7	1264	LCPDEBUG(LOG_WARNING, ("lcp_reqci: bad CI length!\n"));
simon	0:350011bf8be7	1265	orc = CONFREJ; /* Reject bad CI */
simon	0:350011bf8be7	1266	cilen = l; /* Reject till end of packet */
simon	0:350011bf8be7	1267	l = 0; /* Don't loop again */
simon	0:350011bf8be7	1268	citype = 0;
simon	0:350011bf8be7	1269	goto endswitch;
simon	0:350011bf8be7	1270	}
simon	0:350011bf8be7	1271	GETCHAR(citype, p); /* Parse CI type */
simon	0:350011bf8be7	1272	GETCHAR(cilen, p); /* Parse CI length */
simon	0:350011bf8be7	1273	l -= cilen; /* Adjust remaining length */
simon	0:350011bf8be7	1274	next += cilen; /* Step to next CI */
simon	0:350011bf8be7	1275
simon	0:350011bf8be7	1276	switch (citype) { /* Check CI type */
simon	0:350011bf8be7	1277	case CI_MRU:
simon	0:350011bf8be7	1278	if (!ao->neg_mru) { /* Allow option? */
simon	0:350011bf8be7	1279	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - not allowed\n"));
simon	0:350011bf8be7	1280	orc = CONFREJ; /* Reject CI */
simon	0:350011bf8be7	1281	break;
simon	0:350011bf8be7	1282	} else if (cilen != CILEN_SHORT) { /* Check CI length */
simon	0:350011bf8be7	1283	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - bad length\n"));
simon	0:350011bf8be7	1284	orc = CONFREJ; /* Reject CI */
simon	0:350011bf8be7	1285	break;
simon	0:350011bf8be7	1286	}
simon	0:350011bf8be7	1287	GETSHORT(cishort, p); /* Parse MRU */
simon	0:350011bf8be7	1288
simon	0:350011bf8be7	1289	/*
simon	0:350011bf8be7	1290	* He must be able to receive at least our minimum.
simon	0:350011bf8be7	1291	* No need to check a maximum. If he sends a large number,
simon	0:350011bf8be7	1292	* we'll just ignore it.
simon	0:350011bf8be7	1293	*/
simon	0:350011bf8be7	1294	if (cishort < PPP_MINMRU) {
simon	0:350011bf8be7	1295	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak - MRU too small\n"));
simon	0:350011bf8be7	1296	orc = CONFNAK; /* Nak CI */
simon	0:350011bf8be7	1297	PUTCHAR(CI_MRU, nakp);
simon	0:350011bf8be7	1298	PUTCHAR(CILEN_SHORT, nakp);
simon	0:350011bf8be7	1299	PUTSHORT(PPP_MINMRU, nakp); /* Give him a hint */
simon	0:350011bf8be7	1300	break;
simon	0:350011bf8be7	1301	}
simon	0:350011bf8be7	1302	ho->neg_mru = 1; /* Remember he sent MRU */
simon	0:350011bf8be7	1303	ho->mru = cishort; /* And remember value */
simon	0:350011bf8be7	1304	#if TRACELCP > 0
simon	0:350011bf8be7	1305	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MRU %d", cishort);
simon	0:350011bf8be7	1306	traceNdx = strlen(traceBuf);
simon	0:350011bf8be7	1307	#endif
simon	0:350011bf8be7	1308	break;
simon	0:350011bf8be7	1309
simon	0:350011bf8be7	1310	case CI_ASYNCMAP:
simon	0:350011bf8be7	1311	if (!ao->neg_asyncmap) {
simon	0:350011bf8be7	1312	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP not allowed\n"));
simon	0:350011bf8be7	1313	orc = CONFREJ;
simon	0:350011bf8be7	1314	break;
simon	0:350011bf8be7	1315	} else if (cilen != CILEN_LONG) {
simon	0:350011bf8be7	1316	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP bad length\n"));
simon	0:350011bf8be7	1317	orc = CONFREJ;
simon	0:350011bf8be7	1318	break;
simon	0:350011bf8be7	1319	}
simon	0:350011bf8be7	1320	GETLONG(cilong, p);
simon	0:350011bf8be7	1321
simon	0:350011bf8be7	1322	/*
simon	0:350011bf8be7	1323	* Asyncmap must have set at least the bits
simon	0:350011bf8be7	1324	* which are set in lcp_allowoptions[unit].asyncmap.
simon	0:350011bf8be7	1325	*/
simon	0:350011bf8be7	1326	if ((ao->asyncmap & ~cilong) != 0) {
simon	0:350011bf8be7	1327	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak ASYNCMAP %lX missing %lX\n",
simon	0:350011bf8be7	1328	cilong, ao->asyncmap));
simon	0:350011bf8be7	1329	orc = CONFNAK;
simon	0:350011bf8be7	1330	PUTCHAR(CI_ASYNCMAP, nakp);
simon	0:350011bf8be7	1331	PUTCHAR(CILEN_LONG, nakp);
simon	0:350011bf8be7	1332	PUTLONG(ao->asyncmap \| cilong, nakp);
simon	0:350011bf8be7	1333	break;
simon	0:350011bf8be7	1334	}
simon	0:350011bf8be7	1335	ho->neg_asyncmap = 1;
simon	0:350011bf8be7	1336	ho->asyncmap = cilong;
simon	0:350011bf8be7	1337	#if TRACELCP > 0
simon	0:350011bf8be7	1338	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ASYNCMAP=%lX", cilong);
simon	0:350011bf8be7	1339	traceNdx = strlen(traceBuf);
simon	0:350011bf8be7	1340	#endif
simon	0:350011bf8be7	1341	break;
simon	0:350011bf8be7	1342
simon	0:350011bf8be7	1343	case CI_AUTHTYPE:
simon	0:350011bf8be7	1344	if (cilen < CILEN_SHORT) {
simon	0:350011bf8be7	1345	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE missing arg\n"));
simon	0:350011bf8be7	1346	orc = CONFREJ;
simon	0:350011bf8be7	1347	break;
simon	0:350011bf8be7	1348	} else if (!(ao->neg_upap \|\| ao->neg_chap)) {
simon	0:350011bf8be7	1349	/*
simon	0:350011bf8be7	1350	* Reject the option if we're not willing to authenticate.
simon	0:350011bf8be7	1351	*/
simon	0:350011bf8be7	1352	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE not allowed\n"));
simon	0:350011bf8be7	1353	orc = CONFREJ;
simon	0:350011bf8be7	1354	break;
simon	0:350011bf8be7	1355	}
simon	0:350011bf8be7	1356	GETSHORT(cishort, p);
simon	0:350011bf8be7	1357
simon	0:350011bf8be7	1358	/*
simon	0:350011bf8be7	1359	* Authtype must be UPAP or CHAP.
simon	0:350011bf8be7	1360	*
simon	0:350011bf8be7	1361	* Note: if both ao->neg_upap and ao->neg_chap are set,
simon	0:350011bf8be7	1362	* and the peer sends a Configure-Request with two
simon	0:350011bf8be7	1363	* authenticate-protocol requests, one for CHAP and one
simon	0:350011bf8be7	1364	* for UPAP, then we will reject the second request.
simon	0:350011bf8be7	1365	* Whether we end up doing CHAP or UPAP depends then on
simon	0:350011bf8be7	1366	* the ordering of the CIs in the peer's Configure-Request.
simon	0:350011bf8be7	1367	*/
simon	0:350011bf8be7	1368
simon	0:350011bf8be7	1369	if (cishort == PPP_PAP) {
simon	0:350011bf8be7	1370	if (ho->neg_chap) { /* we've already accepted CHAP */
simon	0:350011bf8be7	1371	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP already accepted\n"));
simon	0:350011bf8be7	1372	orc = CONFREJ;
simon	0:350011bf8be7	1373	break;
simon	0:350011bf8be7	1374	} else if (cilen != CILEN_SHORT) {
simon	0:350011bf8be7	1375	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP bad len\n"));
simon	0:350011bf8be7	1376	orc = CONFREJ;
simon	0:350011bf8be7	1377	break;
simon	0:350011bf8be7	1378	}
simon	0:350011bf8be7	1379	if (!ao->neg_upap) { /* we don't want to do PAP */
simon	0:350011bf8be7	1380	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE PAP not allowed\n"));
simon	0:350011bf8be7	1381	orc = CONFNAK; /* NAK it and suggest CHAP */
simon	0:350011bf8be7	1382	PUTCHAR(CI_AUTHTYPE, nakp);
simon	0:350011bf8be7	1383	PUTCHAR(CILEN_CHAP, nakp);
simon	0:350011bf8be7	1384	PUTSHORT(PPP_CHAP, nakp);
simon	0:350011bf8be7	1385	PUTCHAR(ao->chap_mdtype, nakp);
simon	0:350011bf8be7	1386	break;
simon	0:350011bf8be7	1387	}
simon	0:350011bf8be7	1388	ho->neg_upap = 1;
simon	0:350011bf8be7	1389	#if TRACELCP > 0
simon	0:350011bf8be7	1390	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PAP (%X)", cishort);
simon	0:350011bf8be7	1391	traceNdx = strlen(traceBuf);
simon	0:350011bf8be7	1392	#endif
simon	0:350011bf8be7	1393	break;
simon	0:350011bf8be7	1394	}
simon	0:350011bf8be7	1395	if (cishort == PPP_CHAP) {
simon	0:350011bf8be7	1396	if (ho->neg_upap) { /* we've already accepted PAP */
simon	0:350011bf8be7	1397	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP accepted PAP\n"));
simon	0:350011bf8be7	1398	orc = CONFREJ;
simon	0:350011bf8be7	1399	break;
simon	0:350011bf8be7	1400	} else if (cilen != CILEN_CHAP) {
simon	0:350011bf8be7	1401	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP bad len\n"));
simon	0:350011bf8be7	1402	orc = CONFREJ;
simon	0:350011bf8be7	1403	break;
simon	0:350011bf8be7	1404	}
simon	0:350011bf8be7	1405	if (!ao->neg_chap) { /* we don't want to do CHAP */
simon	0:350011bf8be7	1406	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP not allowed\n"));
simon	0:350011bf8be7	1407	orc = CONFNAK; /* NAK it and suggest PAP */
simon	0:350011bf8be7	1408	PUTCHAR(CI_AUTHTYPE, nakp);
simon	0:350011bf8be7	1409	PUTCHAR(CILEN_SHORT, nakp);
simon	0:350011bf8be7	1410	PUTSHORT(PPP_PAP, nakp);
simon	0:350011bf8be7	1411	break;
simon	0:350011bf8be7	1412	}
simon	0:350011bf8be7	1413	GETCHAR(cichar, p); /* get digest type*/
simon	0:350011bf8be7	1414	if (cichar != CHAP_DIGEST_MD5
simon	0:350011bf8be7	1415	#if MSCHAP_SUPPORT
simon	0:350011bf8be7	1416	&& cichar != CHAP_MICROSOFT
simon	0:350011bf8be7	1417	#endif
simon	0:350011bf8be7	1418	) {
simon	0:350011bf8be7	1419	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP digest=%d\n", (int)cichar));
simon	0:350011bf8be7	1420	orc = CONFNAK;
simon	0:350011bf8be7	1421	PUTCHAR(CI_AUTHTYPE, nakp);
simon	0:350011bf8be7	1422	PUTCHAR(CILEN_CHAP, nakp);
simon	0:350011bf8be7	1423	PUTSHORT(PPP_CHAP, nakp);
simon	0:350011bf8be7	1424	PUTCHAR(ao->chap_mdtype, nakp);
simon	0:350011bf8be7	1425	break;
simon	0:350011bf8be7	1426	}
simon	0:350011bf8be7	1427	#if TRACELCP > 0
simon	0:350011bf8be7	1428	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CHAP %X,%d", cishort, (int)cichar);
simon	0:350011bf8be7	1429	traceNdx = strlen(traceBuf);
simon	0:350011bf8be7	1430	#endif
simon	0:350011bf8be7	1431	ho->chap_mdtype = cichar; /* save md type */
simon	0:350011bf8be7	1432	ho->neg_chap = 1;
simon	0:350011bf8be7	1433	break;
simon	0:350011bf8be7	1434	}
simon	0:350011bf8be7	1435
simon	0:350011bf8be7	1436	/*
simon	0:350011bf8be7	1437	* We don't recognize the protocol they're asking for.
simon	0:350011bf8be7	1438	* Nak it with something we're willing to do.
simon	0:350011bf8be7	1439	* (At this point we know ao->neg_upap \|\| ao->neg_chap.)
simon	0:350011bf8be7	1440	*/
simon	0:350011bf8be7	1441	orc = CONFNAK;
simon	0:350011bf8be7	1442	PUTCHAR(CI_AUTHTYPE, nakp);
simon	0:350011bf8be7	1443	if (ao->neg_chap) {
simon	0:350011bf8be7	1444	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req CHAP\n", cishort));
simon	0:350011bf8be7	1445	PUTCHAR(CILEN_CHAP, nakp);
simon	0:350011bf8be7	1446	PUTSHORT(PPP_CHAP, nakp);
simon	0:350011bf8be7	1447	PUTCHAR(ao->chap_mdtype, nakp);
simon	0:350011bf8be7	1448	} else {
simon	0:350011bf8be7	1449	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req PAP\n", cishort));
simon	0:350011bf8be7	1450	PUTCHAR(CILEN_SHORT, nakp);
simon	0:350011bf8be7	1451	PUTSHORT(PPP_PAP, nakp);
simon	0:350011bf8be7	1452	}
simon	0:350011bf8be7	1453	break;
simon	0:350011bf8be7	1454
simon	0:350011bf8be7	1455	case CI_QUALITY:
simon	0:350011bf8be7	1456	GETSHORT(cishort, p);
simon	0:350011bf8be7	1457	GETLONG(cilong, p);
simon	0:350011bf8be7	1458	#if TRACELCP > 0
simon	0:350011bf8be7	1459	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " QUALITY (%x %x)", cishort, (unsigned int) cilong);
simon	0:350011bf8be7	1460	traceNdx = strlen(traceBuf);
simon	0:350011bf8be7	1461	#endif
simon	0:350011bf8be7	1462
simon	0:350011bf8be7	1463	if (!ao->neg_lqr \|\|
simon	0:350011bf8be7	1464	cilen != CILEN_LQR) {
simon	0:350011bf8be7	1465	orc = CONFREJ;
simon	0:350011bf8be7	1466	break;
simon	0:350011bf8be7	1467	}
simon	0:350011bf8be7	1468
simon	0:350011bf8be7	1469	/*
simon	0:350011bf8be7	1470	* Check the protocol and the reporting period.
simon	0:350011bf8be7	1471	* XXX When should we Nak this, and what with?
simon	0:350011bf8be7	1472	*/
simon	0:350011bf8be7	1473	if (cishort != PPP_LQR) {
simon	0:350011bf8be7	1474	orc = CONFNAK;
simon	0:350011bf8be7	1475	PUTCHAR(CI_QUALITY, nakp);
simon	0:350011bf8be7	1476	PUTCHAR(CILEN_LQR, nakp);
simon	0:350011bf8be7	1477	PUTSHORT(PPP_LQR, nakp);
simon	0:350011bf8be7	1478	PUTLONG(ao->lqr_period, nakp);
simon	0:350011bf8be7	1479	break;
simon	0:350011bf8be7	1480	}
simon	0:350011bf8be7	1481	break;
simon	0:350011bf8be7	1482
simon	0:350011bf8be7	1483	case CI_MAGICNUMBER:
simon	0:350011bf8be7	1484	if (!(ao->neg_magicnumber \|\| go->neg_magicnumber) \|\|
simon	0:350011bf8be7	1485	cilen != CILEN_LONG) {
simon	0:350011bf8be7	1486	orc = CONFREJ;
simon	0:350011bf8be7	1487	break;
simon	0:350011bf8be7	1488	}
simon	0:350011bf8be7	1489	GETLONG(cilong, p);
simon	0:350011bf8be7	1490	#if TRACELCP > 0
simon	0:350011bf8be7	1491	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MAGICNUMBER (%lX)", cilong);
simon	0:350011bf8be7	1492	traceNdx = strlen(traceBuf);
simon	0:350011bf8be7	1493	#endif
simon	0:350011bf8be7	1494
simon	0:350011bf8be7	1495	/*
simon	0:350011bf8be7	1496	* He must have a different magic number.
simon	0:350011bf8be7	1497	*/
simon	0:350011bf8be7	1498	if (go->neg_magicnumber &&
simon	0:350011bf8be7	1499	cilong == go->magicnumber) {
simon	0:350011bf8be7	1500	cilong = magic(); /* Don't put magic() inside macro! */
simon	0:350011bf8be7	1501	orc = CONFNAK;
simon	0:350011bf8be7	1502	PUTCHAR(CI_MAGICNUMBER, nakp);
simon	0:350011bf8be7	1503	PUTCHAR(CILEN_LONG, nakp);
simon	0:350011bf8be7	1504	PUTLONG(cilong, nakp);
simon	0:350011bf8be7	1505	break;
simon	0:350011bf8be7	1506	}
simon	0:350011bf8be7	1507	ho->neg_magicnumber = 1;
simon	0:350011bf8be7	1508	ho->magicnumber = cilong;
simon	0:350011bf8be7	1509	break;
simon	0:350011bf8be7	1510
simon	0:350011bf8be7	1511
simon	0:350011bf8be7	1512	case CI_PCOMPRESSION:
simon	0:350011bf8be7	1513	#if TRACELCP > 0
simon	0:350011bf8be7	1514	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PCOMPRESSION");
simon	0:350011bf8be7	1515	traceNdx = strlen(traceBuf);
simon	0:350011bf8be7	1516	#endif
simon	0:350011bf8be7	1517	if (!ao->neg_pcompression \|\|
simon	0:350011bf8be7	1518	cilen != CILEN_VOID) {
simon	0:350011bf8be7	1519	orc = CONFREJ;
simon	0:350011bf8be7	1520	break;
simon	0:350011bf8be7	1521	}
simon	0:350011bf8be7	1522	ho->neg_pcompression = 1;
simon	0:350011bf8be7	1523	break;
simon	0:350011bf8be7	1524
simon	0:350011bf8be7	1525	case CI_ACCOMPRESSION:
simon	0:350011bf8be7	1526	#if TRACELCP > 0
simon	0:350011bf8be7	1527	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ACCOMPRESSION");
simon	0:350011bf8be7	1528	traceNdx = strlen(traceBuf);
simon	0:350011bf8be7	1529	#endif
simon	0:350011bf8be7	1530	if (!ao->neg_accompression \|\|
simon	0:350011bf8be7	1531	cilen != CILEN_VOID) {
simon	0:350011bf8be7	1532	orc = CONFREJ;
simon	0:350011bf8be7	1533	break;
simon	0:350011bf8be7	1534	}
simon	0:350011bf8be7	1535	ho->neg_accompression = 1;
simon	0:350011bf8be7	1536	break;
simon	0:350011bf8be7	1537
simon	0:350011bf8be7	1538	case CI_MRRU:
simon	0:350011bf8be7	1539	#if TRACELCP > 0
simon	0:350011bf8be7	1540	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_MRRU");
simon	0:350011bf8be7	1541	traceNdx = strlen(traceBuf);
simon	0:350011bf8be7	1542	#endif
simon	0:350011bf8be7	1543	orc = CONFREJ;
simon	0:350011bf8be7	1544	break;
simon	0:350011bf8be7	1545
simon	0:350011bf8be7	1546	case CI_SSNHF:
simon	0:350011bf8be7	1547	#if TRACELCP > 0
simon	0:350011bf8be7	1548	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_SSNHF");
simon	0:350011bf8be7	1549	traceNdx = strlen(traceBuf);
simon	0:350011bf8be7	1550	#endif
simon	0:350011bf8be7	1551	orc = CONFREJ;
simon	0:350011bf8be7	1552	break;
simon	0:350011bf8be7	1553
simon	0:350011bf8be7	1554	case CI_EPDISC:
simon	0:350011bf8be7	1555	#if TRACELCP > 0
simon	0:350011bf8be7	1556	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_EPDISC");
simon	0:350011bf8be7	1557	traceNdx = strlen(traceBuf);
simon	0:350011bf8be7	1558	#endif
simon	0:350011bf8be7	1559	orc = CONFREJ;
simon	0:350011bf8be7	1560	break;
simon	0:350011bf8be7	1561
simon	0:350011bf8be7	1562	default:
simon	0:350011bf8be7	1563	#if TRACELCP
simon	0:350011bf8be7	1564	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " unknown %d", citype);
simon	0:350011bf8be7	1565	traceNdx = strlen(traceBuf);
simon	0:350011bf8be7	1566	#endif
simon	0:350011bf8be7	1567	orc = CONFREJ;
simon	0:350011bf8be7	1568	break;
simon	0:350011bf8be7	1569	}
simon	0:350011bf8be7	1570
simon	0:350011bf8be7	1571	endswitch:
simon	0:350011bf8be7	1572	#if TRACELCP
simon	0:350011bf8be7	1573	if (traceNdx >= 80 - 32) {
simon	0:350011bf8be7	1574	LCPDEBUG(LOG_INFO, ("lcp_reqci: rcvd%s\n", traceBuf));
simon	0:350011bf8be7	1575	traceNdx = 0;
simon	0:350011bf8be7	1576	}
simon	0:350011bf8be7	1577	#endif
simon	0:350011bf8be7	1578	if (orc == CONFACK && /* Good CI */
simon	0:350011bf8be7	1579	rc != CONFACK) { /* but prior CI wasnt? */
simon	0:350011bf8be7	1580	continue; /* Don't send this one */
simon	0:350011bf8be7	1581	}
simon	0:350011bf8be7	1582
simon	0:350011bf8be7	1583	if (orc == CONFNAK) { /* Nak this CI? */
simon	0:350011bf8be7	1584	if (reject_if_disagree /* Getting fed up with sending NAKs? */
simon	0:350011bf8be7	1585	&& citype != CI_MAGICNUMBER) {
simon	0:350011bf8be7	1586	orc = CONFREJ; /* Get tough if so */
simon	0:350011bf8be7	1587	} else {
simon	0:350011bf8be7	1588	if (rc == CONFREJ) { /* Rejecting prior CI? */
simon	0:350011bf8be7	1589	continue; /* Don't send this one */
simon	0:350011bf8be7	1590	}
simon	0:350011bf8be7	1591	rc = CONFNAK;
simon	0:350011bf8be7	1592	}
simon	0:350011bf8be7	1593	}
simon	0:350011bf8be7	1594	if (orc == CONFREJ) { /* Reject this CI */
simon	0:350011bf8be7	1595	rc = CONFREJ;
simon	0:350011bf8be7	1596	if (cip != rejp) { /* Need to move rejected CI? */
simon	0:350011bf8be7	1597	BCOPY(cip, rejp, cilen); /* Move it */
simon	0:350011bf8be7	1598	}
simon	0:350011bf8be7	1599	INCPTR(cilen, rejp); /* Update output pointer */
simon	0:350011bf8be7	1600	}
simon	0:350011bf8be7	1601	}
simon	0:350011bf8be7	1602
simon	0:350011bf8be7	1603	/*
simon	0:350011bf8be7	1604	* If we wanted to send additional NAKs (for unsent CIs), the
simon	0:350011bf8be7	1605	* code would go here. The extra NAKs would go at *nakp.
simon	0:350011bf8be7	1606	* At present there are no cases where we want to ask the
simon	0:350011bf8be7	1607	* peer to negotiate an option.
simon	0:350011bf8be7	1608	*/
simon	0:350011bf8be7	1609
simon	0:350011bf8be7	1610	switch (rc) {
simon	0:350011bf8be7	1611	case CONFACK:
simon	0:350011bf8be7	1612	*lenp = (int)(next - inp);
simon	0:350011bf8be7	1613	break;
simon	0:350011bf8be7	1614	case CONFNAK:
simon	0:350011bf8be7	1615	/*
simon	0:350011bf8be7	1616	* Copy the Nak'd options from the nak_buffer to the caller's buffer.
simon	0:350011bf8be7	1617	*/
simon	0:350011bf8be7	1618	*lenp = (int)(nakp - nak_buffer);
simon	0:350011bf8be7	1619	BCOPY(nak_buffer, inp, *lenp);
simon	0:350011bf8be7	1620	break;
simon	0:350011bf8be7	1621	case CONFREJ:
simon	0:350011bf8be7	1622	*lenp = (int)(rejp - inp);
simon	0:350011bf8be7	1623	break;
simon	0:350011bf8be7	1624	}
simon	0:350011bf8be7	1625
simon	0:350011bf8be7	1626	#if TRACELCP > 0
simon	0:350011bf8be7	1627	if (traceNdx > 0) {
simon	0:350011bf8be7	1628	LCPDEBUG(LOG_INFO, ("lcp_reqci: %s\n", traceBuf));
simon	0:350011bf8be7	1629	}
simon	0:350011bf8be7	1630	#endif
simon	0:350011bf8be7	1631	LCPDEBUG(LOG_INFO, ("lcp_reqci: returning CONF%s.\n", CODENAME(rc)));
simon	0:350011bf8be7	1632	return (rc); /* Return final code */
simon	0:350011bf8be7	1633	}
simon	0:350011bf8be7	1634
simon	0:350011bf8be7	1635
simon	0:350011bf8be7	1636	/*
simon	0:350011bf8be7	1637	* lcp_up - LCP has come UP.
simon	0:350011bf8be7	1638	*/
simon	0:350011bf8be7	1639	static void
simon	0:350011bf8be7	1640	lcp_up(fsm *f)
simon	0:350011bf8be7	1641	{
simon	0:350011bf8be7	1642	lcp_options *wo = &lcp_wantoptions[f->unit];
simon	0:350011bf8be7	1643	lcp_options *ho = &lcp_hisoptions[f->unit];
simon	0:350011bf8be7	1644	lcp_options *go = &lcp_gotoptions[f->unit];
simon	0:350011bf8be7	1645	lcp_options *ao = &lcp_allowoptions[f->unit];
simon	0:350011bf8be7	1646
simon	0:350011bf8be7	1647	if (!go->neg_magicnumber) {
simon	0:350011bf8be7	1648	go->magicnumber = 0;
simon	0:350011bf8be7	1649	}
simon	0:350011bf8be7	1650	if (!ho->neg_magicnumber) {
simon	0:350011bf8be7	1651	ho->magicnumber = 0;
simon	0:350011bf8be7	1652	}
simon	0:350011bf8be7	1653
simon	0:350011bf8be7	1654	/*
simon	0:350011bf8be7	1655	* Set our MTU to the smaller of the MTU we wanted and
simon	0:350011bf8be7	1656	* the MRU our peer wanted. If we negotiated an MRU,
simon	0:350011bf8be7	1657	* set our MRU to the larger of value we wanted and
simon	0:350011bf8be7	1658	* the value we got in the negotiation.
simon	0:350011bf8be7	1659	*/
simon	0:350011bf8be7	1660	ppp_send_config(f->unit, LWIP_MIN(ao->mru, (ho->neg_mru? ho->mru: PPP_MRU)),
simon	0:350011bf8be7	1661	(ho->neg_asyncmap? ho->asyncmap: 0xffffffffl),
simon	0:350011bf8be7	1662	ho->neg_pcompression, ho->neg_accompression);
simon	0:350011bf8be7	1663	/*
simon	0:350011bf8be7	1664	* If the asyncmap hasn't been negotiated, we really should
simon	0:350011bf8be7	1665	* set the receive asyncmap to ffffffff, but we set it to 0
simon	0:350011bf8be7	1666	* for backwards contemptibility.
simon	0:350011bf8be7	1667	*/
simon	0:350011bf8be7	1668	ppp_recv_config(f->unit, (go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU),
simon	0:350011bf8be7	1669	(go->neg_asyncmap? go->asyncmap: 0x00000000),
simon	0:350011bf8be7	1670	go->neg_pcompression, go->neg_accompression);
simon	0:350011bf8be7	1671
simon	0:350011bf8be7	1672	if (ho->neg_mru) {
simon	0:350011bf8be7	1673	peer_mru[f->unit] = ho->mru;
simon	0:350011bf8be7	1674	}
simon	0:350011bf8be7	1675
simon	0:350011bf8be7	1676	lcp_echo_lowerup(f->unit); /* Enable echo messages */
simon	0:350011bf8be7	1677
simon	0:350011bf8be7	1678	link_established(f->unit); /* The link is up; authenticate now */
simon	0:350011bf8be7	1679	}
simon	0:350011bf8be7	1680
simon	0:350011bf8be7	1681
simon	0:350011bf8be7	1682	/*
simon	0:350011bf8be7	1683	* lcp_down - LCP has gone DOWN.
simon	0:350011bf8be7	1684	*
simon	0:350011bf8be7	1685	* Alert other protocols.
simon	0:350011bf8be7	1686	*/
simon	0:350011bf8be7	1687	static void
simon	0:350011bf8be7	1688	lcp_down(fsm *f)
simon	0:350011bf8be7	1689	{
simon	0:350011bf8be7	1690	lcp_options *go = &lcp_gotoptions[f->unit];
simon	0:350011bf8be7	1691
simon	0:350011bf8be7	1692	lcp_echo_lowerdown(f->unit);
simon	0:350011bf8be7	1693
simon	0:350011bf8be7	1694	link_down(f->unit);
simon	0:350011bf8be7	1695
simon	0:350011bf8be7	1696	ppp_send_config(f->unit, PPP_MRU, 0xffffffffl, 0, 0);
simon	0:350011bf8be7	1697	ppp_recv_config(f->unit, PPP_MRU,
simon	0:350011bf8be7	1698	(go->neg_asyncmap? go->asyncmap: 0x00000000),
simon	0:350011bf8be7	1699	go->neg_pcompression, go->neg_accompression);
simon	0:350011bf8be7	1700	peer_mru[f->unit] = PPP_MRU;
simon	0:350011bf8be7	1701	}
simon	0:350011bf8be7	1702
simon	0:350011bf8be7	1703
simon	0:350011bf8be7	1704	/*
simon	0:350011bf8be7	1705	* lcp_starting - LCP needs the lower layer up.
simon	0:350011bf8be7	1706	*/
simon	0:350011bf8be7	1707	static void
simon	0:350011bf8be7	1708	lcp_starting(fsm *f)
simon	0:350011bf8be7	1709	{
simon	0:350011bf8be7	1710	link_required(f->unit); /* lwip: currently does nothing */
simon	0:350011bf8be7	1711	}
simon	0:350011bf8be7	1712
simon	0:350011bf8be7	1713
simon	0:350011bf8be7	1714	/*
simon	0:350011bf8be7	1715	* lcp_finished - LCP has finished with the lower layer.
simon	0:350011bf8be7	1716	*/
simon	0:350011bf8be7	1717	static void
simon	0:350011bf8be7	1718	lcp_finished(fsm *f)
simon	0:350011bf8be7	1719	{
simon	0:350011bf8be7	1720	link_terminated(f->unit); /* we are finished with the link */
simon	0:350011bf8be7	1721	}
simon	0:350011bf8be7	1722
simon	0:350011bf8be7	1723
simon	0:350011bf8be7	1724	#if PPP_ADDITIONAL_CALLBACKS
simon	0:350011bf8be7	1725	/*
simon	0:350011bf8be7	1726	* print_string - print a readable representation of a string using
simon	0:350011bf8be7	1727	* printer.
simon	0:350011bf8be7	1728	*/
simon	0:350011bf8be7	1729	static void
simon	0:350011bf8be7	1730	print_string( char p, int len, void (printer) (void , char , ...), void *arg)
simon	0:350011bf8be7	1731	{
simon	0:350011bf8be7	1732	int c;
simon	0:350011bf8be7	1733
simon	0:350011bf8be7	1734	printer(arg, "\"");
simon	0:350011bf8be7	1735	for (; len > 0; --len) {
simon	0:350011bf8be7	1736	c = *p++;
simon	0:350011bf8be7	1737	if (' ' <= c && c <= '~') {
simon	0:350011bf8be7	1738	if (c == '\\' \|\| c == '"') {
simon	0:350011bf8be7	1739	printer(arg, "\\");
simon	0:350011bf8be7	1740	}
simon	0:350011bf8be7	1741	printer(arg, "%c", c);
simon	0:350011bf8be7	1742	} else {
simon	0:350011bf8be7	1743	switch (c) {
simon	0:350011bf8be7	1744	case '\n':
simon	0:350011bf8be7	1745	printer(arg, "\\n");
simon	0:350011bf8be7	1746	break;
simon	0:350011bf8be7	1747	case '\r':
simon	0:350011bf8be7	1748	printer(arg, "\\r");
simon	0:350011bf8be7	1749	break;
simon	0:350011bf8be7	1750	case '\t':
simon	0:350011bf8be7	1751	printer(arg, "\\t");
simon	0:350011bf8be7	1752	break;
simon	0:350011bf8be7	1753	default:
simon	0:350011bf8be7	1754	printer(arg, "\\%.3o", c);
simon	0:350011bf8be7	1755	}
simon	0:350011bf8be7	1756	}
simon	0:350011bf8be7	1757	}
simon	0:350011bf8be7	1758	printer(arg, "\"");
simon	0:350011bf8be7	1759	}
simon	0:350011bf8be7	1760
simon	0:350011bf8be7	1761
simon	0:350011bf8be7	1762	/*
simon	0:350011bf8be7	1763	* lcp_printpkt - print the contents of an LCP packet.
simon	0:350011bf8be7	1764	*/
simon	0:350011bf8be7	1765	static char *lcp_codenames[] = {
simon	0:350011bf8be7	1766	"ConfReq", "ConfAck", "ConfNak", "ConfRej",
simon	0:350011bf8be7	1767	"TermReq", "TermAck", "CodeRej", "ProtRej",
simon	0:350011bf8be7	1768	"EchoReq", "EchoRep", "DiscReq"
simon	0:350011bf8be7	1769	};
simon	0:350011bf8be7	1770
simon	0:350011bf8be7	1771	static int
simon	0:350011bf8be7	1772	lcp_printpkt( u_char p, int plen, void (printer) (void , char , ...), void *arg)
simon	0:350011bf8be7	1773	{
simon	0:350011bf8be7	1774	int code, id, len, olen;
simon	0:350011bf8be7	1775	u_char pstart, optend;
simon	0:350011bf8be7	1776	u_short cishort;
simon	0:350011bf8be7	1777	u32_t cilong;
simon	0:350011bf8be7	1778
simon	0:350011bf8be7	1779	if (plen < HEADERLEN) {
simon	0:350011bf8be7	1780	return 0;
simon	0:350011bf8be7	1781	}
simon	0:350011bf8be7	1782	pstart = p;
simon	0:350011bf8be7	1783	GETCHAR(code, p);
simon	0:350011bf8be7	1784	GETCHAR(id, p);
simon	0:350011bf8be7	1785	GETSHORT(len, p);
simon	0:350011bf8be7	1786	if (len < HEADERLEN \|\| len > plen) {
simon	0:350011bf8be7	1787	return 0;
simon	0:350011bf8be7	1788	}
simon	0:350011bf8be7	1789
simon	0:350011bf8be7	1790	if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *)) {
simon	0:350011bf8be7	1791	printer(arg, " %s", lcp_codenames[code-1]);
simon	0:350011bf8be7	1792	} else {
simon	0:350011bf8be7	1793	printer(arg, " code=0x%x", code);
simon	0:350011bf8be7	1794	}
simon	0:350011bf8be7	1795	printer(arg, " id=0x%x", id);
simon	0:350011bf8be7	1796	len -= HEADERLEN;
simon	0:350011bf8be7	1797	switch (code) {
simon	0:350011bf8be7	1798	case CONFREQ:
simon	0:350011bf8be7	1799	case CONFACK:
simon	0:350011bf8be7	1800	case CONFNAK:
simon	0:350011bf8be7	1801	case CONFREJ:
simon	0:350011bf8be7	1802	/* print option list */
simon	0:350011bf8be7	1803	while (len >= 2) {
simon	0:350011bf8be7	1804	GETCHAR(code, p);
simon	0:350011bf8be7	1805	GETCHAR(olen, p);
simon	0:350011bf8be7	1806	p -= 2;
simon	0:350011bf8be7	1807	if (olen < 2 \|\| olen > len) {
simon	0:350011bf8be7	1808	break;
simon	0:350011bf8be7	1809	}
simon	0:350011bf8be7	1810	printer(arg, " <");
simon	0:350011bf8be7	1811	len -= olen;
simon	0:350011bf8be7	1812	optend = p + olen;
simon	0:350011bf8be7	1813	switch (code) {
simon	0:350011bf8be7	1814	case CI_MRU:
simon	0:350011bf8be7	1815	if (olen == CILEN_SHORT) {
simon	0:350011bf8be7	1816	p += 2;
simon	0:350011bf8be7	1817	GETSHORT(cishort, p);
simon	0:350011bf8be7	1818	printer(arg, "mru %d", cishort);
simon	0:350011bf8be7	1819	}
simon	0:350011bf8be7	1820	break;
simon	0:350011bf8be7	1821	case CI_ASYNCMAP:
simon	0:350011bf8be7	1822	if (olen == CILEN_LONG) {
simon	0:350011bf8be7	1823	p += 2;
simon	0:350011bf8be7	1824	GETLONG(cilong, p);
simon	0:350011bf8be7	1825	printer(arg, "asyncmap 0x%lx", cilong);
simon	0:350011bf8be7	1826	}
simon	0:350011bf8be7	1827	break;
simon	0:350011bf8be7	1828	case CI_AUTHTYPE:
simon	0:350011bf8be7	1829	if (olen >= CILEN_SHORT) {
simon	0:350011bf8be7	1830	p += 2;
simon	0:350011bf8be7	1831	printer(arg, "auth ");
simon	0:350011bf8be7	1832	GETSHORT(cishort, p);
simon	0:350011bf8be7	1833	switch (cishort) {
simon	0:350011bf8be7	1834	case PPP_PAP:
simon	0:350011bf8be7	1835	printer(arg, "pap");
simon	0:350011bf8be7	1836	break;
simon	0:350011bf8be7	1837	case PPP_CHAP:
simon	0:350011bf8be7	1838	printer(arg, "chap");
simon	0:350011bf8be7	1839	break;
simon	0:350011bf8be7	1840	default:
simon	0:350011bf8be7	1841	printer(arg, "0x%x", cishort);
simon	0:350011bf8be7	1842	}
simon	0:350011bf8be7	1843	}
simon	0:350011bf8be7	1844	break;
simon	0:350011bf8be7	1845	case CI_QUALITY:
simon	0:350011bf8be7	1846	if (olen >= CILEN_SHORT) {
simon	0:350011bf8be7	1847	p += 2;
simon	0:350011bf8be7	1848	printer(arg, "quality ");
simon	0:350011bf8be7	1849	GETSHORT(cishort, p);
simon	0:350011bf8be7	1850	switch (cishort) {
simon	0:350011bf8be7	1851	case PPP_LQR:
simon	0:350011bf8be7	1852	printer(arg, "lqr");
simon	0:350011bf8be7	1853	break;
simon	0:350011bf8be7	1854	default:
simon	0:350011bf8be7	1855	printer(arg, "0x%x", cishort);
simon	0:350011bf8be7	1856	}
simon	0:350011bf8be7	1857	}
simon	0:350011bf8be7	1858	break;
simon	0:350011bf8be7	1859	case CI_CALLBACK:
simon	0:350011bf8be7	1860	if (olen >= CILEN_CHAR) {
simon	0:350011bf8be7	1861	p += 2;
simon	0:350011bf8be7	1862	printer(arg, "callback ");
simon	0:350011bf8be7	1863	GETSHORT(cishort, p);
simon	0:350011bf8be7	1864	switch (cishort) {
simon	0:350011bf8be7	1865	case CBCP_OPT:
simon	0:350011bf8be7	1866	printer(arg, "CBCP");
simon	0:350011bf8be7	1867	break;
simon	0:350011bf8be7	1868	default:
simon	0:350011bf8be7	1869	printer(arg, "0x%x", cishort);
simon	0:350011bf8be7	1870	}
simon	0:350011bf8be7	1871	}
simon	0:350011bf8be7	1872	break;
simon	0:350011bf8be7	1873	case CI_MAGICNUMBER:
simon	0:350011bf8be7	1874	if (olen == CILEN_LONG) {
simon	0:350011bf8be7	1875	p += 2;
simon	0:350011bf8be7	1876	GETLONG(cilong, p);
simon	0:350011bf8be7	1877	printer(arg, "magic 0x%x", cilong);
simon	0:350011bf8be7	1878	}
simon	0:350011bf8be7	1879	break;
simon	0:350011bf8be7	1880	case CI_PCOMPRESSION:
simon	0:350011bf8be7	1881	if (olen == CILEN_VOID) {
simon	0:350011bf8be7	1882	p += 2;
simon	0:350011bf8be7	1883	printer(arg, "pcomp");
simon	0:350011bf8be7	1884	}
simon	0:350011bf8be7	1885	break;
simon	0:350011bf8be7	1886	case CI_ACCOMPRESSION:
simon	0:350011bf8be7	1887	if (olen == CILEN_VOID) {
simon	0:350011bf8be7	1888	p += 2;
simon	0:350011bf8be7	1889	printer(arg, "accomp");
simon	0:350011bf8be7	1890	}
simon	0:350011bf8be7	1891	break;
simon	0:350011bf8be7	1892	}
simon	0:350011bf8be7	1893	while (p < optend) {
simon	0:350011bf8be7	1894	GETCHAR(code, p);
simon	0:350011bf8be7	1895	printer(arg, " %.2x", code);
simon	0:350011bf8be7	1896	}
simon	0:350011bf8be7	1897	printer(arg, ">");
simon	0:350011bf8be7	1898	}
simon	0:350011bf8be7	1899	break;
simon	0:350011bf8be7	1900
simon	0:350011bf8be7	1901	case TERMACK:
simon	0:350011bf8be7	1902	case TERMREQ:
simon	0:350011bf8be7	1903	if (len > 0 && p >= ' ' && p < 0x7f) {
simon	0:350011bf8be7	1904	printer(arg, " ");
simon	0:350011bf8be7	1905	print_string((char*)p, len, printer, arg);
simon	0:350011bf8be7	1906	p += len;
simon	0:350011bf8be7	1907	len = 0;
simon	0:350011bf8be7	1908	}
simon	0:350011bf8be7	1909	break;
simon	0:350011bf8be7	1910
simon	0:350011bf8be7	1911	case ECHOREQ:
simon	0:350011bf8be7	1912	case ECHOREP:
simon	0:350011bf8be7	1913	case DISCREQ:
simon	0:350011bf8be7	1914	if (len >= 4) {
simon	0:350011bf8be7	1915	GETLONG(cilong, p);
simon	0:350011bf8be7	1916	printer(arg, " magic=0x%x", cilong);
simon	0:350011bf8be7	1917	p += 4;
simon	0:350011bf8be7	1918	len -= 4;
simon	0:350011bf8be7	1919	}
simon	0:350011bf8be7	1920	break;
simon	0:350011bf8be7	1921	}
simon	0:350011bf8be7	1922
simon	0:350011bf8be7	1923	/* print the rest of the bytes in the packet */
simon	0:350011bf8be7	1924	for (; len > 0; --len) {
simon	0:350011bf8be7	1925	GETCHAR(code, p);
simon	0:350011bf8be7	1926	printer(arg, " %.2x", code);
simon	0:350011bf8be7	1927	}
simon	0:350011bf8be7	1928
simon	0:350011bf8be7	1929	return (int)(p - pstart);
simon	0:350011bf8be7	1930	}
simon	0:350011bf8be7	1931	#endif /* PPP_ADDITIONAL_CALLBACKS */
simon	0:350011bf8be7	1932
simon	0:350011bf8be7	1933	/*
simon	0:350011bf8be7	1934	* Time to shut down the link because there is nothing out there.
simon	0:350011bf8be7	1935	*/
simon	0:350011bf8be7	1936	static void
simon	0:350011bf8be7	1937	LcpLinkFailure (fsm *f)
simon	0:350011bf8be7	1938	{
simon	0:350011bf8be7	1939	if (f->state == LS_OPENED) {
simon	0:350011bf8be7	1940	LCPDEBUG(LOG_INFO, ("No response to %d echo-requests\n", lcp_echos_pending));
simon	0:350011bf8be7	1941	LCPDEBUG(LOG_NOTICE, ("Serial link appears to be disconnected.\n"));
simon	0:350011bf8be7	1942	lcp_close(f->unit, "Peer not responding");
simon	0:350011bf8be7	1943	}
simon	0:350011bf8be7	1944	}
simon	0:350011bf8be7	1945
simon	0:350011bf8be7	1946	/*
simon	0:350011bf8be7	1947	* Timer expired for the LCP echo requests from this process.
simon	0:350011bf8be7	1948	*/
simon	0:350011bf8be7	1949	static void
simon	0:350011bf8be7	1950	LcpEchoCheck (fsm *f)
simon	0:350011bf8be7	1951	{
simon	0:350011bf8be7	1952	LcpSendEchoRequest (f);
simon	0:350011bf8be7	1953
simon	0:350011bf8be7	1954	/*
simon	0:350011bf8be7	1955	* Start the timer for the next interval.
simon	0:350011bf8be7	1956	*/
simon	0:350011bf8be7	1957	LWIP_ASSERT("lcp_echo_timer_running == 0", lcp_echo_timer_running == 0);
simon	0:350011bf8be7	1958
simon	0:350011bf8be7	1959	TIMEOUT (LcpEchoTimeout, f, lcp_echo_interval);
simon	0:350011bf8be7	1960	lcp_echo_timer_running = 1;
simon	0:350011bf8be7	1961	}
simon	0:350011bf8be7	1962
simon	0:350011bf8be7	1963	/*
simon	0:350011bf8be7	1964	* LcpEchoTimeout - Timer expired on the LCP echo
simon	0:350011bf8be7	1965	*/
simon	0:350011bf8be7	1966	static void
simon	0:350011bf8be7	1967	LcpEchoTimeout (void *arg)
simon	0:350011bf8be7	1968	{
simon	0:350011bf8be7	1969	if (lcp_echo_timer_running != 0) {
simon	0:350011bf8be7	1970	lcp_echo_timer_running = 0;
simon	0:350011bf8be7	1971	LcpEchoCheck ((fsm *) arg);
simon	0:350011bf8be7	1972	}
simon	0:350011bf8be7	1973	}
simon	0:350011bf8be7	1974
simon	0:350011bf8be7	1975	/*
simon	0:350011bf8be7	1976	* LcpEchoReply - LCP has received a reply to the echo
simon	0:350011bf8be7	1977	*/
simon	0:350011bf8be7	1978	static void
simon	0:350011bf8be7	1979	lcp_received_echo_reply (fsm f, int id, u_char inp, int len)
simon	0:350011bf8be7	1980	{
simon	0:350011bf8be7	1981	u32_t magic;
simon	0:350011bf8be7	1982
simon	0:350011bf8be7	1983	LWIP_UNUSED_ARG(id);
simon	0:350011bf8be7	1984
simon	0:350011bf8be7	1985	/* Check the magic number - don't count replies from ourselves. */
simon	0:350011bf8be7	1986	if (len < 4) {
simon	0:350011bf8be7	1987	LCPDEBUG(LOG_WARNING, ("lcp: received short Echo-Reply, length %d\n", len));
simon	0:350011bf8be7	1988	return;
simon	0:350011bf8be7	1989	}
simon	0:350011bf8be7	1990	GETLONG(magic, inp);
simon	0:350011bf8be7	1991	if (lcp_gotoptions[f->unit].neg_magicnumber && magic == lcp_gotoptions[f->unit].magicnumber) {
simon	0:350011bf8be7	1992	LCPDEBUG(LOG_WARNING, ("appear to have received our own echo-reply!\n"));
simon	0:350011bf8be7	1993	return;
simon	0:350011bf8be7	1994	}
simon	0:350011bf8be7	1995
simon	0:350011bf8be7	1996	/* Reset the number of outstanding echo frames */
simon	0:350011bf8be7	1997	lcp_echos_pending = 0;
simon	0:350011bf8be7	1998	}
simon	0:350011bf8be7	1999
simon	0:350011bf8be7	2000	/*
simon	0:350011bf8be7	2001	* LcpSendEchoRequest - Send an echo request frame to the peer
simon	0:350011bf8be7	2002	*/
simon	0:350011bf8be7	2003	static void
simon	0:350011bf8be7	2004	LcpSendEchoRequest (fsm *f)
simon	0:350011bf8be7	2005	{
simon	0:350011bf8be7	2006	u32_t lcp_magic;
simon	0:350011bf8be7	2007	u_char pkt[4], *pktp;
simon	0:350011bf8be7	2008
simon	0:350011bf8be7	2009	/*
simon	0:350011bf8be7	2010	* Detect the failure of the peer at this point.
simon	0:350011bf8be7	2011	*/
simon	0:350011bf8be7	2012	if (lcp_echo_fails != 0) {
simon	0:350011bf8be7	2013	if (lcp_echos_pending >= lcp_echo_fails) {
simon	0:350011bf8be7	2014	LcpLinkFailure(f);
simon	0:350011bf8be7	2015	lcp_echos_pending = 0;
simon	0:350011bf8be7	2016	}
simon	0:350011bf8be7	2017	}
simon	0:350011bf8be7	2018
simon	0:350011bf8be7	2019	/*
simon	0:350011bf8be7	2020	* Make and send the echo request frame.
simon	0:350011bf8be7	2021	*/
simon	0:350011bf8be7	2022	if (f->state == LS_OPENED) {
simon	0:350011bf8be7	2023	lcp_magic = lcp_gotoptions[f->unit].magicnumber;
simon	0:350011bf8be7	2024	pktp = pkt;
simon	0:350011bf8be7	2025	PUTLONG(lcp_magic, pktp);
simon	0:350011bf8be7	2026	fsm_sdata(f, ECHOREQ, (u_char)(lcp_echo_number++ & 0xFF), pkt, (int)(pktp - pkt));
simon	0:350011bf8be7	2027	++lcp_echos_pending;
simon	0:350011bf8be7	2028	}
simon	0:350011bf8be7	2029	}
simon	0:350011bf8be7	2030
simon	0:350011bf8be7	2031	/*
simon	0:350011bf8be7	2032	* lcp_echo_lowerup - Start the timer for the LCP frame
simon	0:350011bf8be7	2033	*/
simon	0:350011bf8be7	2034
simon	0:350011bf8be7	2035	static void
simon	0:350011bf8be7	2036	lcp_echo_lowerup (int unit)
simon	0:350011bf8be7	2037	{
simon	0:350011bf8be7	2038	fsm *f = &lcp_fsm[unit];
simon	0:350011bf8be7	2039
simon	0:350011bf8be7	2040	/* Clear the parameters for generating echo frames */
simon	0:350011bf8be7	2041	lcp_echos_pending = 0;
simon	0:350011bf8be7	2042	lcp_echo_number = 0;
simon	0:350011bf8be7	2043	lcp_echo_timer_running = 0;
simon	0:350011bf8be7	2044
simon	0:350011bf8be7	2045	/* If a timeout interval is specified then start the timer */
simon	0:350011bf8be7	2046	if (lcp_echo_interval != 0) {
simon	0:350011bf8be7	2047	LcpEchoCheck (f);
simon	0:350011bf8be7	2048	}
simon	0:350011bf8be7	2049	}
simon	0:350011bf8be7	2050
simon	0:350011bf8be7	2051	/*
simon	0:350011bf8be7	2052	* lcp_echo_lowerdown - Stop the timer for the LCP frame
simon	0:350011bf8be7	2053	*/
simon	0:350011bf8be7	2054
simon	0:350011bf8be7	2055	static void
simon	0:350011bf8be7	2056	lcp_echo_lowerdown (int unit)
simon	0:350011bf8be7	2057	{
simon	0:350011bf8be7	2058	fsm *f = &lcp_fsm[unit];
simon	0:350011bf8be7	2059
simon	0:350011bf8be7	2060	if (lcp_echo_timer_running != 0) {
simon	0:350011bf8be7	2061	UNTIMEOUT (LcpEchoTimeout, f);
simon	0:350011bf8be7	2062	lcp_echo_timer_running = 0;
simon	0:350011bf8be7	2063	}
simon	0:350011bf8be7	2064	}
simon	0:350011bf8be7	2065
simon	0:350011bf8be7	2066	#endif /* PPP_SUPPORT */

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Type:	Library
Created:	23 Nov 2010
Imports:	589
Forks:	0
Commits:	1
Dependents:	5
Dependencies:	0
Followers:	5

lwip/netif/ppp/lcp.c@0:350011bf8be7, 2010-11-23 (annotated)

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