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lwip/netif/ppp/lcp.c@0:632c9925f013, 2010-06-11 (annotated)

Committer:: donatien
Date:: Fri Jun 11 16:05:15 2010 +0000
Revision:: 0:632c9925f013
Child:: 4:fd826cad83c0

Who changed what in which revision?

User	Revision	Line number	New contents of line
donatien	0:632c9925f013	1	/*****************************************************************************
donatien	0:632c9925f013	2	* lcp.c - Network Link Control Protocol program file.
donatien	0:632c9925f013	3	*
donatien	0:632c9925f013	4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
donatien	0:632c9925f013	5	* portions Copyright (c) 1997 by Global Election Systems Inc.
donatien	0:632c9925f013	6	*
donatien	0:632c9925f013	7	* The authors hereby grant permission to use, copy, modify, distribute,
donatien	0:632c9925f013	8	* and license this software and its documentation for any purpose, provided
donatien	0:632c9925f013	9	* that existing copyright notices are retained in all copies and that this
donatien	0:632c9925f013	10	* notice and the following disclaimer are included verbatim in any
donatien	0:632c9925f013	11	* distributions. No written agreement, license, or royalty fee is required
donatien	0:632c9925f013	12	* for any of the authorized uses.
donatien	0:632c9925f013	13	*
donatien	0:632c9925f013	14	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
donatien	0:632c9925f013	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
donatien	0:632c9925f013	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
donatien	0:632c9925f013	17	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
donatien	0:632c9925f013	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
donatien	0:632c9925f013	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
donatien	0:632c9925f013	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
donatien	0:632c9925f013	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
donatien	0:632c9925f013	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
donatien	0:632c9925f013	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
donatien	0:632c9925f013	24	*
donatien	0:632c9925f013	25	******************************************************************************
donatien	0:632c9925f013	26	* REVISION HISTORY
donatien	0:632c9925f013	27	*
donatien	0:632c9925f013	28	* 03-01-01 Marc Boucher <marc@mbsi.ca>
donatien	0:632c9925f013	29	* Ported to lwIP.
donatien	0:632c9925f013	30	* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
donatien	0:632c9925f013	31	* Original.
donatien	0:632c9925f013	32	*****************************************************************************/
donatien	0:632c9925f013	33
donatien	0:632c9925f013	34	/*
donatien	0:632c9925f013	35	* lcp.c - PPP Link Control Protocol.
donatien	0:632c9925f013	36	*
donatien	0:632c9925f013	37	* Copyright (c) 1989 Carnegie Mellon University.
donatien	0:632c9925f013	38	* All rights reserved.
donatien	0:632c9925f013	39	*
donatien	0:632c9925f013	40	* Redistribution and use in source and binary forms are permitted
donatien	0:632c9925f013	41	* provided that the above copyright notice and this paragraph are
donatien	0:632c9925f013	42	* duplicated in all such forms and that any documentation,
donatien	0:632c9925f013	43	* advertising materials, and other materials related to such
donatien	0:632c9925f013	44	* distribution and use acknowledge that the software was developed
donatien	0:632c9925f013	45	* by Carnegie Mellon University. The name of the
donatien	0:632c9925f013	46	* University may not be used to endorse or promote products derived
donatien	0:632c9925f013	47	* from this software without specific prior written permission.
donatien	0:632c9925f013	48	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
donatien	0:632c9925f013	49	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
donatien	0:632c9925f013	50	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
donatien	0:632c9925f013	51	*/
donatien	0:632c9925f013	52
donatien	0:632c9925f013	53
donatien	0:632c9925f013	54	#include "lwip/opt.h"
donatien	0:632c9925f013	55
donatien	0:632c9925f013	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
donatien	0:632c9925f013	57
donatien	0:632c9925f013	58	#include "ppp.h"
donatien	0:632c9925f013	59	#include "pppdebug.h"
donatien	0:632c9925f013	60
donatien	0:632c9925f013	61	#include "fsm.h"
donatien	0:632c9925f013	62	#include "chap.h"
donatien	0:632c9925f013	63	#include "magic.h"
donatien	0:632c9925f013	64	#include "auth.h"
donatien	0:632c9925f013	65	#include "lcp.h"
donatien	0:632c9925f013	66
donatien	0:632c9925f013	67	#include <string.h>
donatien	0:632c9925f013	68
donatien	0:632c9925f013	69	#if PPPOE_SUPPORT
donatien	0:632c9925f013	70	#include "netif/ppp_oe.h"
donatien	0:632c9925f013	71	#else
donatien	0:632c9925f013	72	#define PPPOE_MAXMTU PPP_MAXMRU
donatien	0:632c9925f013	73	#endif
donatien	0:632c9925f013	74
donatien	0:632c9925f013	75	#if 0 /* UNUSED */
donatien	0:632c9925f013	76	/*
donatien	0:632c9925f013	77	* LCP-related command-line options.
donatien	0:632c9925f013	78	*/
donatien	0:632c9925f013	79	int lcp_echo_interval = 0; /* Interval between LCP echo-requests */
donatien	0:632c9925f013	80	int lcp_echo_fails = 0; /* Tolerance to unanswered echo-requests */
donatien	0:632c9925f013	81	bool lax_recv = 0; /* accept control chars in asyncmap */
donatien	0:632c9925f013	82
donatien	0:632c9925f013	83	static int setescape (char **);
donatien	0:632c9925f013	84
donatien	0:632c9925f013	85	static option_t lcp_option_list[] = {
donatien	0:632c9925f013	86	/* LCP options */
donatien	0:632c9925f013	87	/* list stripped for simplicity */
donatien	0:632c9925f013	88	{NULL}
donatien	0:632c9925f013	89	};
donatien	0:632c9925f013	90	#endif /* UNUSED */
donatien	0:632c9925f013	91
donatien	0:632c9925f013	92	/* options */
donatien	0:632c9925f013	93	LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */
donatien	0:632c9925f013	94	static u_int lcp_echo_interval = LCP_ECHOINTERVAL; /* Interval between LCP echo-requests */
donatien	0:632c9925f013	95	static u_int lcp_echo_fails = LCP_MAXECHOFAILS; /* Tolerance to unanswered echo-requests */
donatien	0:632c9925f013	96
donatien	0:632c9925f013	97	/* global vars */
donatien	0:632c9925f013	98	static fsm lcp_fsm[NUM_PPP]; /* LCP fsm structure (global)*/
donatien	0:632c9925f013	99	lcp_options lcp_wantoptions[NUM_PPP]; /* Options that we want to request */
donatien	0:632c9925f013	100	lcp_options lcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
donatien	0:632c9925f013	101	lcp_options lcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
donatien	0:632c9925f013	102	lcp_options lcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
donatien	0:632c9925f013	103	ext_accm xmit_accm[NUM_PPP]; /* extended transmit ACCM */
donatien	0:632c9925f013	104
donatien	0:632c9925f013	105	static u32_t lcp_echos_pending = 0; /* Number of outstanding echo msgs */
donatien	0:632c9925f013	106	static u32_t lcp_echo_number = 0; /* ID number of next echo frame */
donatien	0:632c9925f013	107	static u32_t lcp_echo_timer_running = 0; /* TRUE if a timer is running */
donatien	0:632c9925f013	108
donatien	0:632c9925f013	109	/* @todo: do we really need such a large buffer? The typical 1500 bytes seem too much. */
donatien	0:632c9925f013	110	static u_char nak_buffer[PPP_MRU] MEM_POSITION; /* where we construct a nak packet */
donatien	0:632c9925f013	111
donatien	0:632c9925f013	112	/*
donatien	0:632c9925f013	113	* Callbacks for fsm code. (CI = Configuration Information)
donatien	0:632c9925f013	114	*/
donatien	0:632c9925f013	115	static void lcp_resetci (fsm); / Reset our CI */
donatien	0:632c9925f013	116	static int lcp_cilen (fsm); / Return length of our CI */
donatien	0:632c9925f013	117	static void lcp_addci (fsm, u_char, int); / Add our CI to pkt */
donatien	0:632c9925f013	118	static int lcp_ackci (fsm, u_char, int); /* Peer ack'd our CI */
donatien	0:632c9925f013	119	static int lcp_nakci (fsm, u_char, int); /* Peer nak'd our CI */
donatien	0:632c9925f013	120	static int lcp_rejci (fsm, u_char, int); /* Peer rej'd our CI */
donatien	0:632c9925f013	121	static int lcp_reqci (fsm, u_char, int, int); / Rcv peer CI */
donatien	0:632c9925f013	122	static void lcp_up (fsm); / We're UP */
donatien	0:632c9925f013	123	static void lcp_down (fsm); / We're DOWN */
donatien	0:632c9925f013	124	static void lcp_starting (fsm); / We need lower layer up */
donatien	0:632c9925f013	125	static void lcp_finished (fsm); / We need lower layer down */
donatien	0:632c9925f013	126	static int lcp_extcode (fsm, int, u_char, u_char, int);
donatien	0:632c9925f013	127	static void lcp_rprotrej (fsm, u_char, int);
donatien	0:632c9925f013	128
donatien	0:632c9925f013	129	/*
donatien	0:632c9925f013	130	* routines to send LCP echos to peer
donatien	0:632c9925f013	131	*/
donatien	0:632c9925f013	132
donatien	0:632c9925f013	133	static void lcp_echo_lowerup (int);
donatien	0:632c9925f013	134	static void lcp_echo_lowerdown (int);
donatien	0:632c9925f013	135	static void LcpEchoTimeout (void*);
donatien	0:632c9925f013	136	static void lcp_received_echo_reply (fsm, int, u_char, int);
donatien	0:632c9925f013	137	static void LcpSendEchoRequest (fsm*);
donatien	0:632c9925f013	138	static void LcpLinkFailure (fsm*);
donatien	0:632c9925f013	139	static void LcpEchoCheck (fsm*);
donatien	0:632c9925f013	140
donatien	0:632c9925f013	141	static fsm_callbacks lcp_callbacks = { /* LCP callback routines */
donatien	0:632c9925f013	142	lcp_resetci, /* Reset our Configuration Information */
donatien	0:632c9925f013	143	lcp_cilen, /* Length of our Configuration Information */
donatien	0:632c9925f013	144	lcp_addci, /* Add our Configuration Information */
donatien	0:632c9925f013	145	lcp_ackci, /* ACK our Configuration Information */
donatien	0:632c9925f013	146	lcp_nakci, /* NAK our Configuration Information */
donatien	0:632c9925f013	147	lcp_rejci, /* Reject our Configuration Information */
donatien	0:632c9925f013	148	lcp_reqci, /* Request peer's Configuration Information */
donatien	0:632c9925f013	149	lcp_up, /* Called when fsm reaches LS_OPENED state */
donatien	0:632c9925f013	150	lcp_down, /* Called when fsm leaves LS_OPENED state */
donatien	0:632c9925f013	151	lcp_starting, /* Called when we want the lower layer up */
donatien	0:632c9925f013	152	lcp_finished, /* Called when we want the lower layer down */
donatien	0:632c9925f013	153	NULL, /* Called when Protocol-Reject received */
donatien	0:632c9925f013	154	NULL, /* Retransmission is necessary */
donatien	0:632c9925f013	155	lcp_extcode, /* Called to handle LCP-specific codes */
donatien	0:632c9925f013	156	"LCP" /* String name of protocol */
donatien	0:632c9925f013	157	};
donatien	0:632c9925f013	158
donatien	0:632c9925f013	159	/*
donatien	0:632c9925f013	160	* Protocol entry points.
donatien	0:632c9925f013	161	* Some of these are called directly.
donatien	0:632c9925f013	162	*/
donatien	0:632c9925f013	163
donatien	0:632c9925f013	164	static void lcp_input (int, u_char *, int);
donatien	0:632c9925f013	165	static void lcp_protrej (int);
donatien	0:632c9925f013	166
donatien	0:632c9925f013	167	struct protent lcp_protent = {
donatien	0:632c9925f013	168	PPP_LCP,
donatien	0:632c9925f013	169	lcp_init,
donatien	0:632c9925f013	170	lcp_input,
donatien	0:632c9925f013	171	lcp_protrej,
donatien	0:632c9925f013	172	lcp_lowerup,
donatien	0:632c9925f013	173	lcp_lowerdown,
donatien	0:632c9925f013	174	lcp_open,
donatien	0:632c9925f013	175	lcp_close,
donatien	0:632c9925f013	176	#if PPP_ADDITIONAL_CALLBACKS
donatien	0:632c9925f013	177	lcp_printpkt,
donatien	0:632c9925f013	178	NULL,
donatien	0:632c9925f013	179	#endif /* PPP_ADDITIONAL_CALLBACKS */
donatien	0:632c9925f013	180	1,
donatien	0:632c9925f013	181	"LCP",
donatien	0:632c9925f013	182	#if PPP_ADDITIONAL_CALLBACKS
donatien	0:632c9925f013	183	NULL,
donatien	0:632c9925f013	184	NULL,
donatien	0:632c9925f013	185	NULL
donatien	0:632c9925f013	186	#endif /* PPP_ADDITIONAL_CALLBACKS */
donatien	0:632c9925f013	187	};
donatien	0:632c9925f013	188
donatien	0:632c9925f013	189	int lcp_loopbackfail = DEFLOOPBACKFAIL;
donatien	0:632c9925f013	190
donatien	0:632c9925f013	191	/*
donatien	0:632c9925f013	192	* Length of each type of configuration option (in octets)
donatien	0:632c9925f013	193	*/
donatien	0:632c9925f013	194	#define CILEN_VOID 2
donatien	0:632c9925f013	195	#define CILEN_CHAR 3
donatien	0:632c9925f013	196	#define CILEN_SHORT 4 /* CILEN_VOID + sizeof(short) */
donatien	0:632c9925f013	197	#define CILEN_CHAP 5 /* CILEN_VOID + sizeof(short) + 1 */
donatien	0:632c9925f013	198	#define CILEN_LONG 6 /* CILEN_VOID + sizeof(long) */
donatien	0:632c9925f013	199	#define CILEN_LQR 8 /* CILEN_VOID + sizeof(short) + sizeof(long) */
donatien	0:632c9925f013	200	#define CILEN_CBCP 3
donatien	0:632c9925f013	201
donatien	0:632c9925f013	202	#define CODENAME(x) ((x) == CONFACK ? "ACK" : (x) == CONFNAK ? "NAK" : "REJ")
donatien	0:632c9925f013	203
donatien	0:632c9925f013	204	#if 0 /* UNUSED */
donatien	0:632c9925f013	205	/*
donatien	0:632c9925f013	206	* setescape - add chars to the set we escape on transmission.
donatien	0:632c9925f013	207	*/
donatien	0:632c9925f013	208	static int
donatien	0:632c9925f013	209	setescape(argv)
donatien	0:632c9925f013	210	char **argv;
donatien	0:632c9925f013	211	{
donatien	0:632c9925f013	212	int n, ret;
donatien	0:632c9925f013	213	char p, endp;
donatien	0:632c9925f013	214
donatien	0:632c9925f013	215	p = *argv;
donatien	0:632c9925f013	216	ret = 1;
donatien	0:632c9925f013	217	while (*p) {
donatien	0:632c9925f013	218	n = strtol(p, &endp, 16);
donatien	0:632c9925f013	219	if (p == endp) {
donatien	0:632c9925f013	220	option_error("escape parameter contains invalid hex number '%s'", p);
donatien	0:632c9925f013	221	return 0;
donatien	0:632c9925f013	222	}
donatien	0:632c9925f013	223	p = endp;
donatien	0:632c9925f013	224	if (n < 0 \|\| n == 0x5E \|\| n > 0xFF) {
donatien	0:632c9925f013	225	option_error("can't escape character 0x%x", n);
donatien	0:632c9925f013	226	ret = 0;
donatien	0:632c9925f013	227	} else
donatien	0:632c9925f013	228	xmit_accm[0][n >> 5] \|= 1 << (n & 0x1F);
donatien	0:632c9925f013	229	while (p == ',' \|\| p == ' ')
donatien	0:632c9925f013	230	++p;
donatien	0:632c9925f013	231	}
donatien	0:632c9925f013	232	return ret;
donatien	0:632c9925f013	233	}
donatien	0:632c9925f013	234	#endif /* UNUSED */
donatien	0:632c9925f013	235
donatien	0:632c9925f013	236	/*
donatien	0:632c9925f013	237	* lcp_init - Initialize LCP.
donatien	0:632c9925f013	238	*/
donatien	0:632c9925f013	239	void
donatien	0:632c9925f013	240	lcp_init(int unit)
donatien	0:632c9925f013	241	{
donatien	0:632c9925f013	242	fsm *f = &lcp_fsm[unit];
donatien	0:632c9925f013	243	lcp_options *wo = &lcp_wantoptions[unit];
donatien	0:632c9925f013	244	lcp_options *ao = &lcp_allowoptions[unit];
donatien	0:632c9925f013	245
donatien	0:632c9925f013	246	f->unit = unit;
donatien	0:632c9925f013	247	f->protocol = PPP_LCP;
donatien	0:632c9925f013	248	f->callbacks = &lcp_callbacks;
donatien	0:632c9925f013	249
donatien	0:632c9925f013	250	fsm_init(f);
donatien	0:632c9925f013	251
donatien	0:632c9925f013	252	wo->passive = 0;
donatien	0:632c9925f013	253	wo->silent = 0;
donatien	0:632c9925f013	254	wo->restart = 0; /* Set to 1 in kernels or multi-line implementations */
donatien	0:632c9925f013	255	wo->neg_mru = 1;
donatien	0:632c9925f013	256	wo->mru = PPP_DEFMRU;
donatien	0:632c9925f013	257	wo->neg_asyncmap = 1;
donatien	0:632c9925f013	258	wo->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
donatien	0:632c9925f013	259	wo->neg_chap = 0; /* Set to 1 on server */
donatien	0:632c9925f013	260	wo->neg_upap = 0; /* Set to 1 on server */
donatien	0:632c9925f013	261	wo->chap_mdtype = CHAP_DIGEST_MD5;
donatien	0:632c9925f013	262	wo->neg_magicnumber = 1;
donatien	0:632c9925f013	263	wo->neg_pcompression = 1;
donatien	0:632c9925f013	264	wo->neg_accompression = 1;
donatien	0:632c9925f013	265	wo->neg_lqr = 0; /* no LQR implementation yet */
donatien	0:632c9925f013	266	wo->neg_cbcp = 0;
donatien	0:632c9925f013	267
donatien	0:632c9925f013	268	ao->neg_mru = 1;
donatien	0:632c9925f013	269	ao->mru = PPP_MAXMRU;
donatien	0:632c9925f013	270	ao->neg_asyncmap = 1;
donatien	0:632c9925f013	271	ao->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
donatien	0:632c9925f013	272	ao->neg_chap = (CHAP_SUPPORT != 0);
donatien	0:632c9925f013	273	ao->chap_mdtype = CHAP_DIGEST_MD5;
donatien	0:632c9925f013	274	ao->neg_upap = (PAP_SUPPORT != 0);
donatien	0:632c9925f013	275	ao->neg_magicnumber = 1;
donatien	0:632c9925f013	276	ao->neg_pcompression = 1;
donatien	0:632c9925f013	277	ao->neg_accompression = 1;
donatien	0:632c9925f013	278	ao->neg_lqr = 0; /* no LQR implementation yet */
donatien	0:632c9925f013	279	ao->neg_cbcp = (CBCP_SUPPORT != 0);
donatien	0:632c9925f013	280
donatien	0:632c9925f013	281	/*
donatien	0:632c9925f013	282	* Set transmit escape for the flag and escape characters plus anything
donatien	0:632c9925f013	283	* set for the allowable options.
donatien	0:632c9925f013	284	*/
donatien	0:632c9925f013	285	memset(xmit_accm[unit], 0, sizeof(xmit_accm[0]));
donatien	0:632c9925f013	286	xmit_accm[unit][15] = 0x60;
donatien	0:632c9925f013	287	xmit_accm[unit][0] = (u_char)((ao->asyncmap & 0xFF));
donatien	0:632c9925f013	288	xmit_accm[unit][1] = (u_char)((ao->asyncmap >> 8) & 0xFF);
donatien	0:632c9925f013	289	xmit_accm[unit][2] = (u_char)((ao->asyncmap >> 16) & 0xFF);
donatien	0:632c9925f013	290	xmit_accm[unit][3] = (u_char)((ao->asyncmap >> 24) & 0xFF);
donatien	0:632c9925f013	291	LCPDEBUG(LOG_INFO, ("lcp_init: xmit_accm=%X %X %X %X\n",
donatien	0:632c9925f013	292	xmit_accm[unit][0],
donatien	0:632c9925f013	293	xmit_accm[unit][1],
donatien	0:632c9925f013	294	xmit_accm[unit][2],
donatien	0:632c9925f013	295	xmit_accm[unit][3]));
donatien	0:632c9925f013	296
donatien	0:632c9925f013	297	lcp_phase[unit] = PHASE_INITIALIZE;
donatien	0:632c9925f013	298	}
donatien	0:632c9925f013	299
donatien	0:632c9925f013	300
donatien	0:632c9925f013	301	/*
donatien	0:632c9925f013	302	* lcp_open - LCP is allowed to come up.
donatien	0:632c9925f013	303	*/
donatien	0:632c9925f013	304	void
donatien	0:632c9925f013	305	lcp_open(int unit)
donatien	0:632c9925f013	306	{
donatien	0:632c9925f013	307	fsm *f = &lcp_fsm[unit];
donatien	0:632c9925f013	308	lcp_options *wo = &lcp_wantoptions[unit];
donatien	0:632c9925f013	309
donatien	0:632c9925f013	310	f->flags = 0;
donatien	0:632c9925f013	311	if (wo->passive) {
donatien	0:632c9925f013	312	f->flags \|= OPT_PASSIVE;
donatien	0:632c9925f013	313	}
donatien	0:632c9925f013	314	if (wo->silent) {
donatien	0:632c9925f013	315	f->flags \|= OPT_SILENT;
donatien	0:632c9925f013	316	}
donatien	0:632c9925f013	317	fsm_open(f);
donatien	0:632c9925f013	318
donatien	0:632c9925f013	319	lcp_phase[unit] = PHASE_ESTABLISH;
donatien	0:632c9925f013	320	}
donatien	0:632c9925f013	321
donatien	0:632c9925f013	322
donatien	0:632c9925f013	323	/*
donatien	0:632c9925f013	324	* lcp_close - Take LCP down.
donatien	0:632c9925f013	325	*/
donatien	0:632c9925f013	326	void
donatien	0:632c9925f013	327	lcp_close(int unit, char *reason)
donatien	0:632c9925f013	328	{
donatien	0:632c9925f013	329	fsm *f = &lcp_fsm[unit];
donatien	0:632c9925f013	330
donatien	0:632c9925f013	331	if (lcp_phase[unit] != PHASE_DEAD) {
donatien	0:632c9925f013	332	lcp_phase[unit] = PHASE_TERMINATE;
donatien	0:632c9925f013	333	}
donatien	0:632c9925f013	334	if (f->state == LS_STOPPED && f->flags & (OPT_PASSIVE\|OPT_SILENT)) {
donatien	0:632c9925f013	335	/*
donatien	0:632c9925f013	336	* This action is not strictly according to the FSM in RFC1548,
donatien	0:632c9925f013	337	* but it does mean that the program terminates if you do an
donatien	0:632c9925f013	338	* lcp_close() in passive/silent mode when a connection hasn't
donatien	0:632c9925f013	339	* been established.
donatien	0:632c9925f013	340	*/
donatien	0:632c9925f013	341	f->state = LS_CLOSED;
donatien	0:632c9925f013	342	lcp_finished(f);
donatien	0:632c9925f013	343	} else {
donatien	0:632c9925f013	344	fsm_close(f, reason);
donatien	0:632c9925f013	345	}
donatien	0:632c9925f013	346	}
donatien	0:632c9925f013	347
donatien	0:632c9925f013	348
donatien	0:632c9925f013	349	/*
donatien	0:632c9925f013	350	* lcp_lowerup - The lower layer is up.
donatien	0:632c9925f013	351	*/
donatien	0:632c9925f013	352	void
donatien	0:632c9925f013	353	lcp_lowerup(int unit)
donatien	0:632c9925f013	354	{
donatien	0:632c9925f013	355	lcp_options *wo = &lcp_wantoptions[unit];
donatien	0:632c9925f013	356
donatien	0:632c9925f013	357	/*
donatien	0:632c9925f013	358	* Don't use A/C or protocol compression on transmission,
donatien	0:632c9925f013	359	* but accept A/C and protocol compressed packets
donatien	0:632c9925f013	360	* if we are going to ask for A/C and protocol compression.
donatien	0:632c9925f013	361	*/
donatien	0:632c9925f013	362	ppp_set_xaccm(unit, &xmit_accm[unit]);
donatien	0:632c9925f013	363	ppp_send_config(unit, PPP_MRU, 0xffffffffl, 0, 0);
donatien	0:632c9925f013	364	ppp_recv_config(unit, PPP_MRU, 0x00000000l,
donatien	0:632c9925f013	365	wo->neg_pcompression, wo->neg_accompression);
donatien	0:632c9925f013	366	peer_mru[unit] = PPP_MRU;
donatien	0:632c9925f013	367	lcp_allowoptions[unit].asyncmap = (u_long)xmit_accm[unit][0]
donatien	0:632c9925f013	368	\| ((u_long)xmit_accm[unit][1] << 8)
donatien	0:632c9925f013	369	\| ((u_long)xmit_accm[unit][2] << 16)
donatien	0:632c9925f013	370	\| ((u_long)xmit_accm[unit][3] << 24);
donatien	0:632c9925f013	371	LCPDEBUG(LOG_INFO, ("lcp_lowerup: asyncmap=%X %X %X %X\n",
donatien	0:632c9925f013	372	xmit_accm[unit][3],
donatien	0:632c9925f013	373	xmit_accm[unit][2],
donatien	0:632c9925f013	374	xmit_accm[unit][1],
donatien	0:632c9925f013	375	xmit_accm[unit][0]));
donatien	0:632c9925f013	376
donatien	0:632c9925f013	377	fsm_lowerup(&lcp_fsm[unit]);
donatien	0:632c9925f013	378	}
donatien	0:632c9925f013	379
donatien	0:632c9925f013	380
donatien	0:632c9925f013	381	/*
donatien	0:632c9925f013	382	* lcp_lowerdown - The lower layer is down.
donatien	0:632c9925f013	383	*/
donatien	0:632c9925f013	384	void
donatien	0:632c9925f013	385	lcp_lowerdown(int unit)
donatien	0:632c9925f013	386	{
donatien	0:632c9925f013	387	fsm_lowerdown(&lcp_fsm[unit]);
donatien	0:632c9925f013	388	}
donatien	0:632c9925f013	389
donatien	0:632c9925f013	390
donatien	0:632c9925f013	391	/*
donatien	0:632c9925f013	392	* lcp_input - Input LCP packet.
donatien	0:632c9925f013	393	*/
donatien	0:632c9925f013	394	static void
donatien	0:632c9925f013	395	lcp_input(int unit, u_char *p, int len)
donatien	0:632c9925f013	396	{
donatien	0:632c9925f013	397	fsm *f = &lcp_fsm[unit];
donatien	0:632c9925f013	398
donatien	0:632c9925f013	399	fsm_input(f, p, len);
donatien	0:632c9925f013	400	}
donatien	0:632c9925f013	401
donatien	0:632c9925f013	402
donatien	0:632c9925f013	403	/*
donatien	0:632c9925f013	404	* lcp_extcode - Handle a LCP-specific code.
donatien	0:632c9925f013	405	*/
donatien	0:632c9925f013	406	static int
donatien	0:632c9925f013	407	lcp_extcode(fsm f, int code, u_char id, u_char inp, int len)
donatien	0:632c9925f013	408	{
donatien	0:632c9925f013	409	u_char *magp;
donatien	0:632c9925f013	410
donatien	0:632c9925f013	411	switch( code ){
donatien	0:632c9925f013	412	case PROTREJ:
donatien	0:632c9925f013	413	lcp_rprotrej(f, inp, len);
donatien	0:632c9925f013	414	break;
donatien	0:632c9925f013	415
donatien	0:632c9925f013	416	case ECHOREQ:
donatien	0:632c9925f013	417	if (f->state != LS_OPENED) {
donatien	0:632c9925f013	418	break;
donatien	0:632c9925f013	419	}
donatien	0:632c9925f013	420	LCPDEBUG(LOG_INFO, ("lcp: Echo-Request, Rcvd id %d\n", id));
donatien	0:632c9925f013	421	magp = inp;
donatien	0:632c9925f013	422	PUTLONG(lcp_gotoptions[f->unit].magicnumber, magp);
donatien	0:632c9925f013	423	fsm_sdata(f, ECHOREP, id, inp, len);
donatien	0:632c9925f013	424	break;
donatien	0:632c9925f013	425
donatien	0:632c9925f013	426	case ECHOREP:
donatien	0:632c9925f013	427	lcp_received_echo_reply(f, id, inp, len);
donatien	0:632c9925f013	428	break;
donatien	0:632c9925f013	429
donatien	0:632c9925f013	430	case DISCREQ:
donatien	0:632c9925f013	431	break;
donatien	0:632c9925f013	432
donatien	0:632c9925f013	433	default:
donatien	0:632c9925f013	434	return 0;
donatien	0:632c9925f013	435	}
donatien	0:632c9925f013	436	return 1;
donatien	0:632c9925f013	437	}
donatien	0:632c9925f013	438
donatien	0:632c9925f013	439
donatien	0:632c9925f013	440	/*
donatien	0:632c9925f013	441	* lcp_rprotrej - Receive an Protocol-Reject.
donatien	0:632c9925f013	442	*
donatien	0:632c9925f013	443	* Figure out which protocol is rejected and inform it.
donatien	0:632c9925f013	444	*/
donatien	0:632c9925f013	445	static void
donatien	0:632c9925f013	446	lcp_rprotrej(fsm f, u_char inp, int len)
donatien	0:632c9925f013	447	{
donatien	0:632c9925f013	448	int i;
donatien	0:632c9925f013	449	struct protent *protp;
donatien	0:632c9925f013	450	u_short prot;
donatien	0:632c9925f013	451
donatien	0:632c9925f013	452	if (len < (int)sizeof (u_short)) {
donatien	0:632c9925f013	453	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd short Protocol-Reject packet!\n"));
donatien	0:632c9925f013	454	return;
donatien	0:632c9925f013	455	}
donatien	0:632c9925f013	456
donatien	0:632c9925f013	457	GETSHORT(prot, inp);
donatien	0:632c9925f013	458
donatien	0:632c9925f013	459	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd Protocol-Reject packet for %x!\n", prot));
donatien	0:632c9925f013	460
donatien	0:632c9925f013	461	/*
donatien	0:632c9925f013	462	* Protocol-Reject packets received in any state other than the LCP
donatien	0:632c9925f013	463	* LS_OPENED state SHOULD be silently discarded.
donatien	0:632c9925f013	464	*/
donatien	0:632c9925f013	465	if( f->state != LS_OPENED ) {
donatien	0:632c9925f013	466	LCPDEBUG(LOG_INFO, ("Protocol-Reject discarded: LCP in state %d\n", f->state));
donatien	0:632c9925f013	467	return;
donatien	0:632c9925f013	468	}
donatien	0:632c9925f013	469
donatien	0:632c9925f013	470	/*
donatien	0:632c9925f013	471	* Upcall the proper Protocol-Reject routine.
donatien	0:632c9925f013	472	*/
donatien	0:632c9925f013	473	for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
donatien	0:632c9925f013	474	if (protp->protocol == prot && protp->enabled_flag) {
donatien	0:632c9925f013	475	(*protp->protrej)(f->unit);
donatien	0:632c9925f013	476	return;
donatien	0:632c9925f013	477	}
donatien	0:632c9925f013	478	}
donatien	0:632c9925f013	479
donatien	0:632c9925f013	480	LCPDEBUG(LOG_WARNING, ("Protocol-Reject for unsupported protocol 0x%x\n", prot));
donatien	0:632c9925f013	481	}
donatien	0:632c9925f013	482
donatien	0:632c9925f013	483
donatien	0:632c9925f013	484	/*
donatien	0:632c9925f013	485	* lcp_protrej - A Protocol-Reject was received.
donatien	0:632c9925f013	486	*/
donatien	0:632c9925f013	487	static void
donatien	0:632c9925f013	488	lcp_protrej(int unit)
donatien	0:632c9925f013	489	{
donatien	0:632c9925f013	490	LWIP_UNUSED_ARG(unit);
donatien	0:632c9925f013	491	/*
donatien	0:632c9925f013	492	* Can't reject LCP!
donatien	0:632c9925f013	493	*/
donatien	0:632c9925f013	494	LCPDEBUG(LOG_WARNING, ("lcp_protrej: Received Protocol-Reject for LCP!\n"));
donatien	0:632c9925f013	495	fsm_protreject(&lcp_fsm[unit]);
donatien	0:632c9925f013	496	}
donatien	0:632c9925f013	497
donatien	0:632c9925f013	498
donatien	0:632c9925f013	499	/*
donatien	0:632c9925f013	500	* lcp_sprotrej - Send a Protocol-Reject for some protocol.
donatien	0:632c9925f013	501	*/
donatien	0:632c9925f013	502	void
donatien	0:632c9925f013	503	lcp_sprotrej(int unit, u_char *p, int len)
donatien	0:632c9925f013	504	{
donatien	0:632c9925f013	505	/*
donatien	0:632c9925f013	506	* Send back the protocol and the information field of the
donatien	0:632c9925f013	507	* rejected packet. We only get here if LCP is in the LS_OPENED state.
donatien	0:632c9925f013	508	*/
donatien	0:632c9925f013	509
donatien	0:632c9925f013	510	fsm_sdata(&lcp_fsm[unit], PROTREJ, ++lcp_fsm[unit].id, p, len);
donatien	0:632c9925f013	511	}
donatien	0:632c9925f013	512
donatien	0:632c9925f013	513
donatien	0:632c9925f013	514	/*
donatien	0:632c9925f013	515	* lcp_resetci - Reset our CI.
donatien	0:632c9925f013	516	*/
donatien	0:632c9925f013	517	static void
donatien	0:632c9925f013	518	lcp_resetci(fsm *f)
donatien	0:632c9925f013	519	{
donatien	0:632c9925f013	520	lcp_wantoptions[f->unit].magicnumber = magic();
donatien	0:632c9925f013	521	lcp_wantoptions[f->unit].numloops = 0;
donatien	0:632c9925f013	522	lcp_gotoptions[f->unit] = lcp_wantoptions[f->unit];
donatien	0:632c9925f013	523	peer_mru[f->unit] = PPP_MRU;
donatien	0:632c9925f013	524	auth_reset(f->unit);
donatien	0:632c9925f013	525	}
donatien	0:632c9925f013	526
donatien	0:632c9925f013	527
donatien	0:632c9925f013	528	/*
donatien	0:632c9925f013	529	* lcp_cilen - Return length of our CI.
donatien	0:632c9925f013	530	*/
donatien	0:632c9925f013	531	static int
donatien	0:632c9925f013	532	lcp_cilen(fsm *f)
donatien	0:632c9925f013	533	{
donatien	0:632c9925f013	534	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:632c9925f013	535
donatien	0:632c9925f013	536	#define LENCIVOID(neg) ((neg) ? CILEN_VOID : 0)
donatien	0:632c9925f013	537	#define LENCICHAP(neg) ((neg) ? CILEN_CHAP : 0)
donatien	0:632c9925f013	538	#define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0)
donatien	0:632c9925f013	539	#define LENCILONG(neg) ((neg) ? CILEN_LONG : 0)
donatien	0:632c9925f013	540	#define LENCILQR(neg) ((neg) ? CILEN_LQR: 0)
donatien	0:632c9925f013	541	#define LENCICBCP(neg) ((neg) ? CILEN_CBCP: 0)
donatien	0:632c9925f013	542	/*
donatien	0:632c9925f013	543	* NB: we only ask for one of CHAP and UPAP, even if we will
donatien	0:632c9925f013	544	* accept either.
donatien	0:632c9925f013	545	*/
donatien	0:632c9925f013	546	return (LENCISHORT(go->neg_mru && go->mru != PPP_DEFMRU) +
donatien	0:632c9925f013	547	LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) +
donatien	0:632c9925f013	548	LENCICHAP(go->neg_chap) +
donatien	0:632c9925f013	549	LENCISHORT(!go->neg_chap && go->neg_upap) +
donatien	0:632c9925f013	550	LENCILQR(go->neg_lqr) +
donatien	0:632c9925f013	551	LENCICBCP(go->neg_cbcp) +
donatien	0:632c9925f013	552	LENCILONG(go->neg_magicnumber) +
donatien	0:632c9925f013	553	LENCIVOID(go->neg_pcompression) +
donatien	0:632c9925f013	554	LENCIVOID(go->neg_accompression));
donatien	0:632c9925f013	555	}
donatien	0:632c9925f013	556
donatien	0:632c9925f013	557
donatien	0:632c9925f013	558	/*
donatien	0:632c9925f013	559	* lcp_addci - Add our desired CIs to a packet.
donatien	0:632c9925f013	560	*/
donatien	0:632c9925f013	561	static void
donatien	0:632c9925f013	562	lcp_addci(fsm f, u_char ucp, int *lenp)
donatien	0:632c9925f013	563	{
donatien	0:632c9925f013	564	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:632c9925f013	565	u_char *start_ucp = ucp;
donatien	0:632c9925f013	566
donatien	0:632c9925f013	567	#define ADDCIVOID(opt, neg) \
donatien	0:632c9925f013	568	if (neg) { \
donatien	0:632c9925f013	569	LCPDEBUG(LOG_INFO, ("lcp_addci: opt=%d\n", opt)); \
donatien	0:632c9925f013	570	PUTCHAR(opt, ucp); \
donatien	0:632c9925f013	571	PUTCHAR(CILEN_VOID, ucp); \
donatien	0:632c9925f013	572	}
donatien	0:632c9925f013	573	#define ADDCISHORT(opt, neg, val) \
donatien	0:632c9925f013	574	if (neg) { \
donatien	0:632c9925f013	575	LCPDEBUG(LOG_INFO, ("lcp_addci: INT opt=%d %X\n", opt, val)); \
donatien	0:632c9925f013	576	PUTCHAR(opt, ucp); \
donatien	0:632c9925f013	577	PUTCHAR(CILEN_SHORT, ucp); \
donatien	0:632c9925f013	578	PUTSHORT(val, ucp); \
donatien	0:632c9925f013	579	}
donatien	0:632c9925f013	580	#define ADDCICHAP(opt, neg, val, digest) \
donatien	0:632c9925f013	581	if (neg) { \
donatien	0:632c9925f013	582	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAP opt=%d %X\n", opt, val)); \
donatien	0:632c9925f013	583	PUTCHAR(opt, ucp); \
donatien	0:632c9925f013	584	PUTCHAR(CILEN_CHAP, ucp); \
donatien	0:632c9925f013	585	PUTSHORT(val, ucp); \
donatien	0:632c9925f013	586	PUTCHAR(digest, ucp); \
donatien	0:632c9925f013	587	}
donatien	0:632c9925f013	588	#define ADDCILONG(opt, neg, val) \
donatien	0:632c9925f013	589	if (neg) { \
donatien	0:632c9925f013	590	LCPDEBUG(LOG_INFO, ("lcp_addci: L opt=%d %lX\n", opt, val)); \
donatien	0:632c9925f013	591	PUTCHAR(opt, ucp); \
donatien	0:632c9925f013	592	PUTCHAR(CILEN_LONG, ucp); \
donatien	0:632c9925f013	593	PUTLONG(val, ucp); \
donatien	0:632c9925f013	594	}
donatien	0:632c9925f013	595	#define ADDCILQR(opt, neg, val) \
donatien	0:632c9925f013	596	if (neg) { \
donatien	0:632c9925f013	597	LCPDEBUG(LOG_INFO, ("lcp_addci: LQR opt=%d %lX\n", opt, val)); \
donatien	0:632c9925f013	598	PUTCHAR(opt, ucp); \
donatien	0:632c9925f013	599	PUTCHAR(CILEN_LQR, ucp); \
donatien	0:632c9925f013	600	PUTSHORT(PPP_LQR, ucp); \
donatien	0:632c9925f013	601	PUTLONG(val, ucp); \
donatien	0:632c9925f013	602	}
donatien	0:632c9925f013	603	#define ADDCICHAR(opt, neg, val) \
donatien	0:632c9925f013	604	if (neg) { \
donatien	0:632c9925f013	605	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAR opt=%d %X '%z'\n", opt, val, val)); \
donatien	0:632c9925f013	606	PUTCHAR(opt, ucp); \
donatien	0:632c9925f013	607	PUTCHAR(CILEN_CHAR, ucp); \
donatien	0:632c9925f013	608	PUTCHAR(val, ucp); \
donatien	0:632c9925f013	609	}
donatien	0:632c9925f013	610
donatien	0:632c9925f013	611	ADDCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
donatien	0:632c9925f013	612	ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
donatien	0:632c9925f013	613	ADDCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
donatien	0:632c9925f013	614	ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
donatien	0:632c9925f013	615	ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
donatien	0:632c9925f013	616	ADDCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
donatien	0:632c9925f013	617	ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
donatien	0:632c9925f013	618	ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
donatien	0:632c9925f013	619	ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
donatien	0:632c9925f013	620
donatien	0:632c9925f013	621	if (ucp - start_ucp != *lenp) {
donatien	0:632c9925f013	622	/* this should never happen, because peer_mtu should be 1500 */
donatien	0:632c9925f013	623	LCPDEBUG(LOG_ERR, ("Bug in lcp_addci: wrong length\n"));
donatien	0:632c9925f013	624	}
donatien	0:632c9925f013	625	}
donatien	0:632c9925f013	626
donatien	0:632c9925f013	627
donatien	0:632c9925f013	628	/*
donatien	0:632c9925f013	629	* lcp_ackci - Ack our CIs.
donatien	0:632c9925f013	630	* This should not modify any state if the Ack is bad.
donatien	0:632c9925f013	631	*
donatien	0:632c9925f013	632	* Returns:
donatien	0:632c9925f013	633	* 0 - Ack was bad.
donatien	0:632c9925f013	634	* 1 - Ack was good.
donatien	0:632c9925f013	635	*/
donatien	0:632c9925f013	636	static int
donatien	0:632c9925f013	637	lcp_ackci(fsm f, u_char p, int len)
donatien	0:632c9925f013	638	{
donatien	0:632c9925f013	639	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:632c9925f013	640	u_char cilen, citype, cichar;
donatien	0:632c9925f013	641	u_short cishort;
donatien	0:632c9925f013	642	u32_t cilong;
donatien	0:632c9925f013	643
donatien	0:632c9925f013	644	/*
donatien	0:632c9925f013	645	* CIs must be in exactly the same order that we sent.
donatien	0:632c9925f013	646	* Check packet length and CI length at each step.
donatien	0:632c9925f013	647	* If we find any deviations, then this packet is bad.
donatien	0:632c9925f013	648	*/
donatien	0:632c9925f013	649	#define ACKCIVOID(opt, neg) \
donatien	0:632c9925f013	650	if (neg) { \
donatien	0:632c9925f013	651	if ((len -= CILEN_VOID) < 0) \
donatien	0:632c9925f013	652	goto bad; \
donatien	0:632c9925f013	653	GETCHAR(citype, p); \
donatien	0:632c9925f013	654	GETCHAR(cilen, p); \
donatien	0:632c9925f013	655	if (cilen != CILEN_VOID \|\| citype != opt) \
donatien	0:632c9925f013	656	goto bad; \
donatien	0:632c9925f013	657	}
donatien	0:632c9925f013	658	#define ACKCISHORT(opt, neg, val) \
donatien	0:632c9925f013	659	if (neg) { \
donatien	0:632c9925f013	660	if ((len -= CILEN_SHORT) < 0) \
donatien	0:632c9925f013	661	goto bad; \
donatien	0:632c9925f013	662	GETCHAR(citype, p); \
donatien	0:632c9925f013	663	GETCHAR(cilen, p); \
donatien	0:632c9925f013	664	if (cilen != CILEN_SHORT \|\| citype != opt) \
donatien	0:632c9925f013	665	goto bad; \
donatien	0:632c9925f013	666	GETSHORT(cishort, p); \
donatien	0:632c9925f013	667	if (cishort != val) \
donatien	0:632c9925f013	668	goto bad; \
donatien	0:632c9925f013	669	}
donatien	0:632c9925f013	670	#define ACKCICHAR(opt, neg, val) \
donatien	0:632c9925f013	671	if (neg) { \
donatien	0:632c9925f013	672	if ((len -= CILEN_CHAR) < 0) \
donatien	0:632c9925f013	673	goto bad; \
donatien	0:632c9925f013	674	GETCHAR(citype, p); \
donatien	0:632c9925f013	675	GETCHAR(cilen, p); \
donatien	0:632c9925f013	676	if (cilen != CILEN_CHAR \|\| citype != opt) \
donatien	0:632c9925f013	677	goto bad; \
donatien	0:632c9925f013	678	GETCHAR(cichar, p); \
donatien	0:632c9925f013	679	if (cichar != val) \
donatien	0:632c9925f013	680	goto bad; \
donatien	0:632c9925f013	681	}
donatien	0:632c9925f013	682	#define ACKCICHAP(opt, neg, val, digest) \
donatien	0:632c9925f013	683	if (neg) { \
donatien	0:632c9925f013	684	if ((len -= CILEN_CHAP) < 0) \
donatien	0:632c9925f013	685	goto bad; \
donatien	0:632c9925f013	686	GETCHAR(citype, p); \
donatien	0:632c9925f013	687	GETCHAR(cilen, p); \
donatien	0:632c9925f013	688	if (cilen != CILEN_CHAP \|\| citype != opt) \
donatien	0:632c9925f013	689	goto bad; \
donatien	0:632c9925f013	690	GETSHORT(cishort, p); \
donatien	0:632c9925f013	691	if (cishort != val) \
donatien	0:632c9925f013	692	goto bad; \
donatien	0:632c9925f013	693	GETCHAR(cichar, p); \
donatien	0:632c9925f013	694	if (cichar != digest) \
donatien	0:632c9925f013	695	goto bad; \
donatien	0:632c9925f013	696	}
donatien	0:632c9925f013	697	#define ACKCILONG(opt, neg, val) \
donatien	0:632c9925f013	698	if (neg) { \
donatien	0:632c9925f013	699	if ((len -= CILEN_LONG) < 0) \
donatien	0:632c9925f013	700	goto bad; \
donatien	0:632c9925f013	701	GETCHAR(citype, p); \
donatien	0:632c9925f013	702	GETCHAR(cilen, p); \
donatien	0:632c9925f013	703	if (cilen != CILEN_LONG \|\| citype != opt) \
donatien	0:632c9925f013	704	goto bad; \
donatien	0:632c9925f013	705	GETLONG(cilong, p); \
donatien	0:632c9925f013	706	if (cilong != val) \
donatien	0:632c9925f013	707	goto bad; \
donatien	0:632c9925f013	708	}
donatien	0:632c9925f013	709	#define ACKCILQR(opt, neg, val) \
donatien	0:632c9925f013	710	if (neg) { \
donatien	0:632c9925f013	711	if ((len -= CILEN_LQR) < 0) \
donatien	0:632c9925f013	712	goto bad; \
donatien	0:632c9925f013	713	GETCHAR(citype, p); \
donatien	0:632c9925f013	714	GETCHAR(cilen, p); \
donatien	0:632c9925f013	715	if (cilen != CILEN_LQR \|\| citype != opt) \
donatien	0:632c9925f013	716	goto bad; \
donatien	0:632c9925f013	717	GETSHORT(cishort, p); \
donatien	0:632c9925f013	718	if (cishort != PPP_LQR) \
donatien	0:632c9925f013	719	goto bad; \
donatien	0:632c9925f013	720	GETLONG(cilong, p); \
donatien	0:632c9925f013	721	if (cilong != val) \
donatien	0:632c9925f013	722	goto bad; \
donatien	0:632c9925f013	723	}
donatien	0:632c9925f013	724
donatien	0:632c9925f013	725	ACKCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
donatien	0:632c9925f013	726	ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
donatien	0:632c9925f013	727	ACKCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
donatien	0:632c9925f013	728	ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
donatien	0:632c9925f013	729	ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
donatien	0:632c9925f013	730	ACKCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
donatien	0:632c9925f013	731	ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
donatien	0:632c9925f013	732	ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
donatien	0:632c9925f013	733	ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
donatien	0:632c9925f013	734
donatien	0:632c9925f013	735	/*
donatien	0:632c9925f013	736	* If there are any remaining CIs, then this packet is bad.
donatien	0:632c9925f013	737	*/
donatien	0:632c9925f013	738	if (len != 0) {
donatien	0:632c9925f013	739	goto bad;
donatien	0:632c9925f013	740	}
donatien	0:632c9925f013	741	LCPDEBUG(LOG_INFO, ("lcp_acki: Ack\n"));
donatien	0:632c9925f013	742	return (1);
donatien	0:632c9925f013	743	bad:
donatien	0:632c9925f013	744	LCPDEBUG(LOG_WARNING, ("lcp_acki: received bad Ack!\n"));
donatien	0:632c9925f013	745	return (0);
donatien	0:632c9925f013	746	}
donatien	0:632c9925f013	747
donatien	0:632c9925f013	748
donatien	0:632c9925f013	749	/*
donatien	0:632c9925f013	750	* lcp_nakci - Peer has sent a NAK for some of our CIs.
donatien	0:632c9925f013	751	* This should not modify any state if the Nak is bad
donatien	0:632c9925f013	752	* or if LCP is in the LS_OPENED state.
donatien	0:632c9925f013	753	*
donatien	0:632c9925f013	754	* Returns:
donatien	0:632c9925f013	755	* 0 - Nak was bad.
donatien	0:632c9925f013	756	* 1 - Nak was good.
donatien	0:632c9925f013	757	*/
donatien	0:632c9925f013	758	static int
donatien	0:632c9925f013	759	lcp_nakci(fsm f, u_char p, int len)
donatien	0:632c9925f013	760	{
donatien	0:632c9925f013	761	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:632c9925f013	762	lcp_options *wo = &lcp_wantoptions[f->unit];
donatien	0:632c9925f013	763	u_char citype, cichar, *next;
donatien	0:632c9925f013	764	u_short cishort;
donatien	0:632c9925f013	765	u32_t cilong;
donatien	0:632c9925f013	766	lcp_options no; /* options we've seen Naks for */
donatien	0:632c9925f013	767	lcp_options try; /* options to request next time */
donatien	0:632c9925f013	768	int looped_back = 0;
donatien	0:632c9925f013	769	int cilen;
donatien	0:632c9925f013	770
donatien	0:632c9925f013	771	BZERO(&no, sizeof(no));
donatien	0:632c9925f013	772	try = *go;
donatien	0:632c9925f013	773
donatien	0:632c9925f013	774	/*
donatien	0:632c9925f013	775	* Any Nak'd CIs must be in exactly the same order that we sent.
donatien	0:632c9925f013	776	* Check packet length and CI length at each step.
donatien	0:632c9925f013	777	* If we find any deviations, then this packet is bad.
donatien	0:632c9925f013	778	*/
donatien	0:632c9925f013	779	#define NAKCIVOID(opt, neg, code) \
donatien	0:632c9925f013	780	if (go->neg && \
donatien	0:632c9925f013	781	len >= CILEN_VOID && \
donatien	0:632c9925f013	782	p[1] == CILEN_VOID && \
donatien	0:632c9925f013	783	p[0] == opt) { \
donatien	0:632c9925f013	784	len -= CILEN_VOID; \
donatien	0:632c9925f013	785	INCPTR(CILEN_VOID, p); \
donatien	0:632c9925f013	786	no.neg = 1; \
donatien	0:632c9925f013	787	code \
donatien	0:632c9925f013	788	}
donatien	0:632c9925f013	789	#define NAKCICHAP(opt, neg, code) \
donatien	0:632c9925f013	790	if (go->neg && \
donatien	0:632c9925f013	791	len >= CILEN_CHAP && \
donatien	0:632c9925f013	792	p[1] == CILEN_CHAP && \
donatien	0:632c9925f013	793	p[0] == opt) { \
donatien	0:632c9925f013	794	len -= CILEN_CHAP; \
donatien	0:632c9925f013	795	INCPTR(2, p); \
donatien	0:632c9925f013	796	GETSHORT(cishort, p); \
donatien	0:632c9925f013	797	GETCHAR(cichar, p); \
donatien	0:632c9925f013	798	no.neg = 1; \
donatien	0:632c9925f013	799	code \
donatien	0:632c9925f013	800	}
donatien	0:632c9925f013	801	#define NAKCICHAR(opt, neg, code) \
donatien	0:632c9925f013	802	if (go->neg && \
donatien	0:632c9925f013	803	len >= CILEN_CHAR && \
donatien	0:632c9925f013	804	p[1] == CILEN_CHAR && \
donatien	0:632c9925f013	805	p[0] == opt) { \
donatien	0:632c9925f013	806	len -= CILEN_CHAR; \
donatien	0:632c9925f013	807	INCPTR(2, p); \
donatien	0:632c9925f013	808	GETCHAR(cichar, p); \
donatien	0:632c9925f013	809	no.neg = 1; \
donatien	0:632c9925f013	810	code \
donatien	0:632c9925f013	811	}
donatien	0:632c9925f013	812	#define NAKCISHORT(opt, neg, code) \
donatien	0:632c9925f013	813	if (go->neg && \
donatien	0:632c9925f013	814	len >= CILEN_SHORT && \
donatien	0:632c9925f013	815	p[1] == CILEN_SHORT && \
donatien	0:632c9925f013	816	p[0] == opt) { \
donatien	0:632c9925f013	817	len -= CILEN_SHORT; \
donatien	0:632c9925f013	818	INCPTR(2, p); \
donatien	0:632c9925f013	819	GETSHORT(cishort, p); \
donatien	0:632c9925f013	820	no.neg = 1; \
donatien	0:632c9925f013	821	code \
donatien	0:632c9925f013	822	}
donatien	0:632c9925f013	823	#define NAKCILONG(opt, neg, code) \
donatien	0:632c9925f013	824	if (go->neg && \
donatien	0:632c9925f013	825	len >= CILEN_LONG && \
donatien	0:632c9925f013	826	p[1] == CILEN_LONG && \
donatien	0:632c9925f013	827	p[0] == opt) { \
donatien	0:632c9925f013	828	len -= CILEN_LONG; \
donatien	0:632c9925f013	829	INCPTR(2, p); \
donatien	0:632c9925f013	830	GETLONG(cilong, p); \
donatien	0:632c9925f013	831	no.neg = 1; \
donatien	0:632c9925f013	832	code \
donatien	0:632c9925f013	833	}
donatien	0:632c9925f013	834	#define NAKCILQR(opt, neg, code) \
donatien	0:632c9925f013	835	if (go->neg && \
donatien	0:632c9925f013	836	len >= CILEN_LQR && \
donatien	0:632c9925f013	837	p[1] == CILEN_LQR && \
donatien	0:632c9925f013	838	p[0] == opt) { \
donatien	0:632c9925f013	839	len -= CILEN_LQR; \
donatien	0:632c9925f013	840	INCPTR(2, p); \
donatien	0:632c9925f013	841	GETSHORT(cishort, p); \
donatien	0:632c9925f013	842	GETLONG(cilong, p); \
donatien	0:632c9925f013	843	no.neg = 1; \
donatien	0:632c9925f013	844	code \
donatien	0:632c9925f013	845	}
donatien	0:632c9925f013	846
donatien	0:632c9925f013	847	/*
donatien	0:632c9925f013	848	* We don't care if they want to send us smaller packets than
donatien	0:632c9925f013	849	* we want. Therefore, accept any MRU less than what we asked for,
donatien	0:632c9925f013	850	* but then ignore the new value when setting the MRU in the kernel.
donatien	0:632c9925f013	851	* If they send us a bigger MRU than what we asked, accept it, up to
donatien	0:632c9925f013	852	* the limit of the default MRU we'd get if we didn't negotiate.
donatien	0:632c9925f013	853	*/
donatien	0:632c9925f013	854	if (go->neg_mru && go->mru != PPP_DEFMRU) {
donatien	0:632c9925f013	855	NAKCISHORT(CI_MRU, neg_mru,
donatien	0:632c9925f013	856	if (cishort <= wo->mru \|\| cishort < PPP_DEFMRU) {
donatien	0:632c9925f013	857	try.mru = cishort;
donatien	0:632c9925f013	858	}
donatien	0:632c9925f013	859	);
donatien	0:632c9925f013	860	}
donatien	0:632c9925f013	861
donatien	0:632c9925f013	862	/*
donatien	0:632c9925f013	863	* Add any characters they want to our (receive-side) asyncmap.
donatien	0:632c9925f013	864	*/
donatien	0:632c9925f013	865	if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) {
donatien	0:632c9925f013	866	NAKCILONG(CI_ASYNCMAP, neg_asyncmap,
donatien	0:632c9925f013	867	try.asyncmap = go->asyncmap \| cilong;
donatien	0:632c9925f013	868	);
donatien	0:632c9925f013	869	}
donatien	0:632c9925f013	870
donatien	0:632c9925f013	871	/*
donatien	0:632c9925f013	872	* If they've nak'd our authentication-protocol, check whether
donatien	0:632c9925f013	873	* they are proposing a different protocol, or a different
donatien	0:632c9925f013	874	* hash algorithm for CHAP.
donatien	0:632c9925f013	875	*/
donatien	0:632c9925f013	876	if ((go->neg_chap \|\| go->neg_upap)
donatien	0:632c9925f013	877	&& len >= CILEN_SHORT
donatien	0:632c9925f013	878	&& p[0] == CI_AUTHTYPE && p[1] >= CILEN_SHORT && p[1] <= len) {
donatien	0:632c9925f013	879	cilen = p[1];
donatien	0:632c9925f013	880	len -= cilen;
donatien	0:632c9925f013	881	no.neg_chap = go->neg_chap;
donatien	0:632c9925f013	882	no.neg_upap = go->neg_upap;
donatien	0:632c9925f013	883	INCPTR(2, p);
donatien	0:632c9925f013	884	GETSHORT(cishort, p);
donatien	0:632c9925f013	885	if (cishort == PPP_PAP && cilen == CILEN_SHORT) {
donatien	0:632c9925f013	886	/*
donatien	0:632c9925f013	887	* If we were asking for CHAP, they obviously don't want to do it.
donatien	0:632c9925f013	888	* If we weren't asking for CHAP, then we were asking for PAP,
donatien	0:632c9925f013	889	* in which case this Nak is bad.
donatien	0:632c9925f013	890	*/
donatien	0:632c9925f013	891	if (!go->neg_chap) {
donatien	0:632c9925f013	892	goto bad;
donatien	0:632c9925f013	893	}
donatien	0:632c9925f013	894	try.neg_chap = 0;
donatien	0:632c9925f013	895
donatien	0:632c9925f013	896	} else if (cishort == PPP_CHAP && cilen == CILEN_CHAP) {
donatien	0:632c9925f013	897	GETCHAR(cichar, p);
donatien	0:632c9925f013	898	if (go->neg_chap) {
donatien	0:632c9925f013	899	/*
donatien	0:632c9925f013	900	* We were asking for CHAP/MD5; they must want a different
donatien	0:632c9925f013	901	* algorithm. If they can't do MD5, we'll have to stop
donatien	0:632c9925f013	902	* asking for CHAP.
donatien	0:632c9925f013	903	*/
donatien	0:632c9925f013	904	if (cichar != go->chap_mdtype) {
donatien	0:632c9925f013	905	try.neg_chap = 0;
donatien	0:632c9925f013	906	}
donatien	0:632c9925f013	907	} else {
donatien	0:632c9925f013	908	/*
donatien	0:632c9925f013	909	* Stop asking for PAP if we were asking for it.
donatien	0:632c9925f013	910	*/
donatien	0:632c9925f013	911	try.neg_upap = 0;
donatien	0:632c9925f013	912	}
donatien	0:632c9925f013	913
donatien	0:632c9925f013	914	} else {
donatien	0:632c9925f013	915	/*
donatien	0:632c9925f013	916	* We don't recognize what they're suggesting.
donatien	0:632c9925f013	917	* Stop asking for what we were asking for.
donatien	0:632c9925f013	918	*/
donatien	0:632c9925f013	919	if (go->neg_chap) {
donatien	0:632c9925f013	920	try.neg_chap = 0;
donatien	0:632c9925f013	921	} else {
donatien	0:632c9925f013	922	try.neg_upap = 0;
donatien	0:632c9925f013	923	}
donatien	0:632c9925f013	924	p += cilen - CILEN_SHORT;
donatien	0:632c9925f013	925	}
donatien	0:632c9925f013	926	}
donatien	0:632c9925f013	927
donatien	0:632c9925f013	928	/*
donatien	0:632c9925f013	929	* If they can't cope with our link quality protocol, we'll have
donatien	0:632c9925f013	930	* to stop asking for LQR. We haven't got any other protocol.
donatien	0:632c9925f013	931	* If they Nak the reporting period, take their value XXX ?
donatien	0:632c9925f013	932	*/
donatien	0:632c9925f013	933	NAKCILQR(CI_QUALITY, neg_lqr,
donatien	0:632c9925f013	934	if (cishort != PPP_LQR) {
donatien	0:632c9925f013	935	try.neg_lqr = 0;
donatien	0:632c9925f013	936	} else {
donatien	0:632c9925f013	937	try.lqr_period = cilong;
donatien	0:632c9925f013	938	}
donatien	0:632c9925f013	939	);
donatien	0:632c9925f013	940
donatien	0:632c9925f013	941	/*
donatien	0:632c9925f013	942	* Only implementing CBCP...not the rest of the callback options
donatien	0:632c9925f013	943	*/
donatien	0:632c9925f013	944	NAKCICHAR(CI_CALLBACK, neg_cbcp,
donatien	0:632c9925f013	945	try.neg_cbcp = 0;
donatien	0:632c9925f013	946	);
donatien	0:632c9925f013	947
donatien	0:632c9925f013	948	/*
donatien	0:632c9925f013	949	* Check for a looped-back line.
donatien	0:632c9925f013	950	*/
donatien	0:632c9925f013	951	NAKCILONG(CI_MAGICNUMBER, neg_magicnumber,
donatien	0:632c9925f013	952	try.magicnumber = magic();
donatien	0:632c9925f013	953	looped_back = 1;
donatien	0:632c9925f013	954	);
donatien	0:632c9925f013	955
donatien	0:632c9925f013	956	/*
donatien	0:632c9925f013	957	* Peer shouldn't send Nak for protocol compression or
donatien	0:632c9925f013	958	* address/control compression requests; they should send
donatien	0:632c9925f013	959	* a Reject instead. If they send a Nak, treat it as a Reject.
donatien	0:632c9925f013	960	*/
donatien	0:632c9925f013	961	NAKCIVOID(CI_PCOMPRESSION, neg_pcompression,
donatien	0:632c9925f013	962	try.neg_pcompression = 0;
donatien	0:632c9925f013	963	);
donatien	0:632c9925f013	964	NAKCIVOID(CI_ACCOMPRESSION, neg_accompression,
donatien	0:632c9925f013	965	try.neg_accompression = 0;
donatien	0:632c9925f013	966	);
donatien	0:632c9925f013	967
donatien	0:632c9925f013	968	/*
donatien	0:632c9925f013	969	* There may be remaining CIs, if the peer is requesting negotiation
donatien	0:632c9925f013	970	* on an option that we didn't include in our request packet.
donatien	0:632c9925f013	971	* If we see an option that we requested, or one we've already seen
donatien	0:632c9925f013	972	* in this packet, then this packet is bad.
donatien	0:632c9925f013	973	* If we wanted to respond by starting to negotiate on the requested
donatien	0:632c9925f013	974	* option(s), we could, but we don't, because except for the
donatien	0:632c9925f013	975	* authentication type and quality protocol, if we are not negotiating
donatien	0:632c9925f013	976	* an option, it is because we were told not to.
donatien	0:632c9925f013	977	* For the authentication type, the Nak from the peer means
donatien	0:632c9925f013	978	* `let me authenticate myself with you' which is a bit pointless.
donatien	0:632c9925f013	979	* For the quality protocol, the Nak means `ask me to send you quality
donatien	0:632c9925f013	980	* reports', but if we didn't ask for them, we don't want them.
donatien	0:632c9925f013	981	* An option we don't recognize represents the peer asking to
donatien	0:632c9925f013	982	* negotiate some option we don't support, so ignore it.
donatien	0:632c9925f013	983	*/
donatien	0:632c9925f013	984	while (len > CILEN_VOID) {
donatien	0:632c9925f013	985	GETCHAR(citype, p);
donatien	0:632c9925f013	986	GETCHAR(cilen, p);
donatien	0:632c9925f013	987	if (cilen < CILEN_VOID \|\| (len -= cilen) < 0) {
donatien	0:632c9925f013	988	goto bad;
donatien	0:632c9925f013	989	}
donatien	0:632c9925f013	990	next = p + cilen - 2;
donatien	0:632c9925f013	991
donatien	0:632c9925f013	992	switch (citype) {
donatien	0:632c9925f013	993	case CI_MRU:
donatien	0:632c9925f013	994	if ((go->neg_mru && go->mru != PPP_DEFMRU)
donatien	0:632c9925f013	995	\|\| no.neg_mru \|\| cilen != CILEN_SHORT) {
donatien	0:632c9925f013	996	goto bad;
donatien	0:632c9925f013	997	}
donatien	0:632c9925f013	998	GETSHORT(cishort, p);
donatien	0:632c9925f013	999	if (cishort < PPP_DEFMRU) {
donatien	0:632c9925f013	1000	try.mru = cishort;
donatien	0:632c9925f013	1001	}
donatien	0:632c9925f013	1002	break;
donatien	0:632c9925f013	1003	case CI_ASYNCMAP:
donatien	0:632c9925f013	1004	if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl)
donatien	0:632c9925f013	1005	\|\| no.neg_asyncmap \|\| cilen != CILEN_LONG) {
donatien	0:632c9925f013	1006	goto bad;
donatien	0:632c9925f013	1007	}
donatien	0:632c9925f013	1008	break;
donatien	0:632c9925f013	1009	case CI_AUTHTYPE:
donatien	0:632c9925f013	1010	if (go->neg_chap \|\| no.neg_chap \|\| go->neg_upap \|\| no.neg_upap) {
donatien	0:632c9925f013	1011	goto bad;
donatien	0:632c9925f013	1012	}
donatien	0:632c9925f013	1013	break;
donatien	0:632c9925f013	1014	case CI_MAGICNUMBER:
donatien	0:632c9925f013	1015	if (go->neg_magicnumber \|\| no.neg_magicnumber \|\|
donatien	0:632c9925f013	1016	cilen != CILEN_LONG) {
donatien	0:632c9925f013	1017	goto bad;
donatien	0:632c9925f013	1018	}
donatien	0:632c9925f013	1019	break;
donatien	0:632c9925f013	1020	case CI_PCOMPRESSION:
donatien	0:632c9925f013	1021	if (go->neg_pcompression \|\| no.neg_pcompression
donatien	0:632c9925f013	1022	\|\| cilen != CILEN_VOID) {
donatien	0:632c9925f013	1023	goto bad;
donatien	0:632c9925f013	1024	}
donatien	0:632c9925f013	1025	break;
donatien	0:632c9925f013	1026	case CI_ACCOMPRESSION:
donatien	0:632c9925f013	1027	if (go->neg_accompression \|\| no.neg_accompression
donatien	0:632c9925f013	1028	\|\| cilen != CILEN_VOID) {
donatien	0:632c9925f013	1029	goto bad;
donatien	0:632c9925f013	1030	}
donatien	0:632c9925f013	1031	break;
donatien	0:632c9925f013	1032	case CI_QUALITY:
donatien	0:632c9925f013	1033	if (go->neg_lqr \|\| no.neg_lqr \|\| cilen != CILEN_LQR) {
donatien	0:632c9925f013	1034	goto bad;
donatien	0:632c9925f013	1035	}
donatien	0:632c9925f013	1036	break;
donatien	0:632c9925f013	1037	}
donatien	0:632c9925f013	1038	p = next;
donatien	0:632c9925f013	1039	}
donatien	0:632c9925f013	1040
donatien	0:632c9925f013	1041	/* If there is still anything left, this packet is bad. */
donatien	0:632c9925f013	1042	if (len != 0) {
donatien	0:632c9925f013	1043	goto bad;
donatien	0:632c9925f013	1044	}
donatien	0:632c9925f013	1045
donatien	0:632c9925f013	1046	/*
donatien	0:632c9925f013	1047	* OK, the Nak is good. Now we can update state.
donatien	0:632c9925f013	1048	*/
donatien	0:632c9925f013	1049	if (f->state != LS_OPENED) {
donatien	0:632c9925f013	1050	if (looped_back) {
donatien	0:632c9925f013	1051	if (++try.numloops >= lcp_loopbackfail) {
donatien	0:632c9925f013	1052	LCPDEBUG(LOG_NOTICE, ("Serial line is looped back.\n"));
donatien	0:632c9925f013	1053	lcp_close(f->unit, "Loopback detected");
donatien	0:632c9925f013	1054	}
donatien	0:632c9925f013	1055	} else {
donatien	0:632c9925f013	1056	try.numloops = 0;
donatien	0:632c9925f013	1057	}
donatien	0:632c9925f013	1058	*go = try;
donatien	0:632c9925f013	1059	}
donatien	0:632c9925f013	1060
donatien	0:632c9925f013	1061	return 1;
donatien	0:632c9925f013	1062
donatien	0:632c9925f013	1063	bad:
donatien	0:632c9925f013	1064	LCPDEBUG(LOG_WARNING, ("lcp_nakci: received bad Nak!\n"));
donatien	0:632c9925f013	1065	return 0;
donatien	0:632c9925f013	1066	}
donatien	0:632c9925f013	1067
donatien	0:632c9925f013	1068
donatien	0:632c9925f013	1069	/*
donatien	0:632c9925f013	1070	* lcp_rejci - Peer has Rejected some of our CIs.
donatien	0:632c9925f013	1071	* This should not modify any state if the Reject is bad
donatien	0:632c9925f013	1072	* or if LCP is in the LS_OPENED state.
donatien	0:632c9925f013	1073	*
donatien	0:632c9925f013	1074	* Returns:
donatien	0:632c9925f013	1075	* 0 - Reject was bad.
donatien	0:632c9925f013	1076	* 1 - Reject was good.
donatien	0:632c9925f013	1077	*/
donatien	0:632c9925f013	1078	static int
donatien	0:632c9925f013	1079	lcp_rejci(fsm f, u_char p, int len)
donatien	0:632c9925f013	1080	{
donatien	0:632c9925f013	1081	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:632c9925f013	1082	u_char cichar;
donatien	0:632c9925f013	1083	u_short cishort;
donatien	0:632c9925f013	1084	u32_t cilong;
donatien	0:632c9925f013	1085	lcp_options try; /* options to request next time */
donatien	0:632c9925f013	1086
donatien	0:632c9925f013	1087	try = *go;
donatien	0:632c9925f013	1088
donatien	0:632c9925f013	1089	/*
donatien	0:632c9925f013	1090	* Any Rejected CIs must be in exactly the same order that we sent.
donatien	0:632c9925f013	1091	* Check packet length and CI length at each step.
donatien	0:632c9925f013	1092	* If we find any deviations, then this packet is bad.
donatien	0:632c9925f013	1093	*/
donatien	0:632c9925f013	1094	#define REJCIVOID(opt, neg) \
donatien	0:632c9925f013	1095	if (go->neg && \
donatien	0:632c9925f013	1096	len >= CILEN_VOID && \
donatien	0:632c9925f013	1097	p[1] == CILEN_VOID && \
donatien	0:632c9925f013	1098	p[0] == opt) { \
donatien	0:632c9925f013	1099	len -= CILEN_VOID; \
donatien	0:632c9925f013	1100	INCPTR(CILEN_VOID, p); \
donatien	0:632c9925f013	1101	try.neg = 0; \
donatien	0:632c9925f013	1102	LCPDEBUG(LOG_INFO, ("lcp_rejci: void opt %d rejected\n", opt)); \
donatien	0:632c9925f013	1103	}
donatien	0:632c9925f013	1104	#define REJCISHORT(opt, neg, val) \
donatien	0:632c9925f013	1105	if (go->neg && \
donatien	0:632c9925f013	1106	len >= CILEN_SHORT && \
donatien	0:632c9925f013	1107	p[1] == CILEN_SHORT && \
donatien	0:632c9925f013	1108	p[0] == opt) { \
donatien	0:632c9925f013	1109	len -= CILEN_SHORT; \
donatien	0:632c9925f013	1110	INCPTR(2, p); \
donatien	0:632c9925f013	1111	GETSHORT(cishort, p); \
donatien	0:632c9925f013	1112	/* Check rejected value. */ \
donatien	0:632c9925f013	1113	if (cishort != val) { \
donatien	0:632c9925f013	1114	goto bad; \
donatien	0:632c9925f013	1115	} \
donatien	0:632c9925f013	1116	try.neg = 0; \
donatien	0:632c9925f013	1117	LCPDEBUG(LOG_INFO, ("lcp_rejci: short opt %d rejected\n", opt)); \
donatien	0:632c9925f013	1118	}
donatien	0:632c9925f013	1119	#define REJCICHAP(opt, neg, val, digest) \
donatien	0:632c9925f013	1120	if (go->neg && \
donatien	0:632c9925f013	1121	len >= CILEN_CHAP && \
donatien	0:632c9925f013	1122	p[1] == CILEN_CHAP && \
donatien	0:632c9925f013	1123	p[0] == opt) { \
donatien	0:632c9925f013	1124	len -= CILEN_CHAP; \
donatien	0:632c9925f013	1125	INCPTR(2, p); \
donatien	0:632c9925f013	1126	GETSHORT(cishort, p); \
donatien	0:632c9925f013	1127	GETCHAR(cichar, p); \
donatien	0:632c9925f013	1128	/* Check rejected value. */ \
donatien	0:632c9925f013	1129	if (cishort != val \|\| cichar != digest) { \
donatien	0:632c9925f013	1130	goto bad; \
donatien	0:632c9925f013	1131	} \
donatien	0:632c9925f013	1132	try.neg = 0; \
donatien	0:632c9925f013	1133	try.neg_upap = 0; \
donatien	0:632c9925f013	1134	LCPDEBUG(LOG_INFO, ("lcp_rejci: chap opt %d rejected\n", opt)); \
donatien	0:632c9925f013	1135	}
donatien	0:632c9925f013	1136	#define REJCILONG(opt, neg, val) \
donatien	0:632c9925f013	1137	if (go->neg && \
donatien	0:632c9925f013	1138	len >= CILEN_LONG && \
donatien	0:632c9925f013	1139	p[1] == CILEN_LONG && \
donatien	0:632c9925f013	1140	p[0] == opt) { \
donatien	0:632c9925f013	1141	len -= CILEN_LONG; \
donatien	0:632c9925f013	1142	INCPTR(2, p); \
donatien	0:632c9925f013	1143	GETLONG(cilong, p); \
donatien	0:632c9925f013	1144	/* Check rejected value. */ \
donatien	0:632c9925f013	1145	if (cilong != val) { \
donatien	0:632c9925f013	1146	goto bad; \
donatien	0:632c9925f013	1147	} \
donatien	0:632c9925f013	1148	try.neg = 0; \
donatien	0:632c9925f013	1149	LCPDEBUG(LOG_INFO, ("lcp_rejci: long opt %d rejected\n", opt)); \
donatien	0:632c9925f013	1150	}
donatien	0:632c9925f013	1151	#define REJCILQR(opt, neg, val) \
donatien	0:632c9925f013	1152	if (go->neg && \
donatien	0:632c9925f013	1153	len >= CILEN_LQR && \
donatien	0:632c9925f013	1154	p[1] == CILEN_LQR && \
donatien	0:632c9925f013	1155	p[0] == opt) { \
donatien	0:632c9925f013	1156	len -= CILEN_LQR; \
donatien	0:632c9925f013	1157	INCPTR(2, p); \
donatien	0:632c9925f013	1158	GETSHORT(cishort, p); \
donatien	0:632c9925f013	1159	GETLONG(cilong, p); \
donatien	0:632c9925f013	1160	/* Check rejected value. */ \
donatien	0:632c9925f013	1161	if (cishort != PPP_LQR \|\| cilong != val) { \
donatien	0:632c9925f013	1162	goto bad; \
donatien	0:632c9925f013	1163	} \
donatien	0:632c9925f013	1164	try.neg = 0; \
donatien	0:632c9925f013	1165	LCPDEBUG(LOG_INFO, ("lcp_rejci: LQR opt %d rejected\n", opt)); \
donatien	0:632c9925f013	1166	}
donatien	0:632c9925f013	1167	#define REJCICBCP(opt, neg, val) \
donatien	0:632c9925f013	1168	if (go->neg && \
donatien	0:632c9925f013	1169	len >= CILEN_CBCP && \
donatien	0:632c9925f013	1170	p[1] == CILEN_CBCP && \
donatien	0:632c9925f013	1171	p[0] == opt) { \
donatien	0:632c9925f013	1172	len -= CILEN_CBCP; \
donatien	0:632c9925f013	1173	INCPTR(2, p); \
donatien	0:632c9925f013	1174	GETCHAR(cichar, p); \
donatien	0:632c9925f013	1175	/* Check rejected value. */ \
donatien	0:632c9925f013	1176	if (cichar != val) { \
donatien	0:632c9925f013	1177	goto bad; \
donatien	0:632c9925f013	1178	} \
donatien	0:632c9925f013	1179	try.neg = 0; \
donatien	0:632c9925f013	1180	LCPDEBUG(LOG_INFO, ("lcp_rejci: Callback opt %d rejected\n", opt)); \
donatien	0:632c9925f013	1181	}
donatien	0:632c9925f013	1182
donatien	0:632c9925f013	1183	REJCISHORT(CI_MRU, neg_mru, go->mru);
donatien	0:632c9925f013	1184	REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap);
donatien	0:632c9925f013	1185	REJCICHAP(CI_AUTHTYPE, neg_chap, PPP_CHAP, go->chap_mdtype);
donatien	0:632c9925f013	1186	if (!go->neg_chap) {
donatien	0:632c9925f013	1187	REJCISHORT(CI_AUTHTYPE, neg_upap, PPP_PAP);
donatien	0:632c9925f013	1188	}
donatien	0:632c9925f013	1189	REJCILQR(CI_QUALITY, neg_lqr, go->lqr_period);
donatien	0:632c9925f013	1190	REJCICBCP(CI_CALLBACK, neg_cbcp, CBCP_OPT);
donatien	0:632c9925f013	1191	REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber);
donatien	0:632c9925f013	1192	REJCIVOID(CI_PCOMPRESSION, neg_pcompression);
donatien	0:632c9925f013	1193	REJCIVOID(CI_ACCOMPRESSION, neg_accompression);
donatien	0:632c9925f013	1194
donatien	0:632c9925f013	1195	/*
donatien	0:632c9925f013	1196	* If there are any remaining CIs, then this packet is bad.
donatien	0:632c9925f013	1197	*/
donatien	0:632c9925f013	1198	if (len != 0) {
donatien	0:632c9925f013	1199	goto bad;
donatien	0:632c9925f013	1200	}
donatien	0:632c9925f013	1201	/*
donatien	0:632c9925f013	1202	* Now we can update state.
donatien	0:632c9925f013	1203	*/
donatien	0:632c9925f013	1204	if (f->state != LS_OPENED) {
donatien	0:632c9925f013	1205	*go = try;
donatien	0:632c9925f013	1206	}
donatien	0:632c9925f013	1207	return 1;
donatien	0:632c9925f013	1208
donatien	0:632c9925f013	1209	bad:
donatien	0:632c9925f013	1210	LCPDEBUG(LOG_WARNING, ("lcp_rejci: received bad Reject!\n"));
donatien	0:632c9925f013	1211	return 0;
donatien	0:632c9925f013	1212	}
donatien	0:632c9925f013	1213
donatien	0:632c9925f013	1214
donatien	0:632c9925f013	1215	/*
donatien	0:632c9925f013	1216	* lcp_reqci - Check the peer's requested CIs and send appropriate response.
donatien	0:632c9925f013	1217	*
donatien	0:632c9925f013	1218	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
donatien	0:632c9925f013	1219	* appropriately. If reject_if_disagree is non-zero, doesn't return
donatien	0:632c9925f013	1220	* CONFNAK; returns CONFREJ if it can't return CONFACK.
donatien	0:632c9925f013	1221	*/
donatien	0:632c9925f013	1222	static int
donatien	0:632c9925f013	1223	lcp_reqci(fsm *f,
donatien	0:632c9925f013	1224	u_char inp, / Requested CIs */
donatien	0:632c9925f013	1225	int lenp, / Length of requested CIs */
donatien	0:632c9925f013	1226	int reject_if_disagree)
donatien	0:632c9925f013	1227	{
donatien	0:632c9925f013	1228	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:632c9925f013	1229	lcp_options *ho = &lcp_hisoptions[f->unit];
donatien	0:632c9925f013	1230	lcp_options *ao = &lcp_allowoptions[f->unit];
donatien	0:632c9925f013	1231	u_char cip, next; /* Pointer to current and next CIs */
donatien	0:632c9925f013	1232	int cilen, citype; /* Parsed len, type */
donatien	0:632c9925f013	1233	u_char cichar; /* Parsed char value */
donatien	0:632c9925f013	1234	u_short cishort; /* Parsed short value */
donatien	0:632c9925f013	1235	u32_t cilong; /* Parse long value */
donatien	0:632c9925f013	1236	int rc = CONFACK; /* Final packet return code */
donatien	0:632c9925f013	1237	int orc; /* Individual option return code */
donatien	0:632c9925f013	1238	u_char p; / Pointer to next char to parse */
donatien	0:632c9925f013	1239	u_char rejp; / Pointer to next char in reject frame */
donatien	0:632c9925f013	1240	u_char nakp; / Pointer to next char in Nak frame */
donatien	0:632c9925f013	1241	int l = lenp; / Length left */
donatien	0:632c9925f013	1242	#if TRACELCP > 0
donatien	0:632c9925f013	1243	char traceBuf[80];
donatien	0:632c9925f013	1244	size_t traceNdx = 0;
donatien	0:632c9925f013	1245	#endif
donatien	0:632c9925f013	1246
donatien	0:632c9925f013	1247	/*
donatien	0:632c9925f013	1248	* Reset all his options.
donatien	0:632c9925f013	1249	*/
donatien	0:632c9925f013	1250	BZERO(ho, sizeof(*ho));
donatien	0:632c9925f013	1251
donatien	0:632c9925f013	1252	/*
donatien	0:632c9925f013	1253	* Process all his options.
donatien	0:632c9925f013	1254	*/
donatien	0:632c9925f013	1255	next = inp;
donatien	0:632c9925f013	1256	nakp = nak_buffer;
donatien	0:632c9925f013	1257	rejp = inp;
donatien	0:632c9925f013	1258	while (l) {
donatien	0:632c9925f013	1259	orc = CONFACK; /* Assume success */
donatien	0:632c9925f013	1260	cip = p = next; /* Remember begining of CI */
donatien	0:632c9925f013	1261	if (l < 2 \|\| /* Not enough data for CI header or */
donatien	0:632c9925f013	1262	p[1] < 2 \|\| /* CI length too small or */
donatien	0:632c9925f013	1263	p[1] > l) { /* CI length too big? */
donatien	0:632c9925f013	1264	LCPDEBUG(LOG_WARNING, ("lcp_reqci: bad CI length!\n"));
donatien	0:632c9925f013	1265	orc = CONFREJ; /* Reject bad CI */
donatien	0:632c9925f013	1266	cilen = l; /* Reject till end of packet */
donatien	0:632c9925f013	1267	l = 0; /* Don't loop again */
donatien	0:632c9925f013	1268	citype = 0;
donatien	0:632c9925f013	1269	goto endswitch;
donatien	0:632c9925f013	1270	}
donatien	0:632c9925f013	1271	GETCHAR(citype, p); /* Parse CI type */
donatien	0:632c9925f013	1272	GETCHAR(cilen, p); /* Parse CI length */
donatien	0:632c9925f013	1273	l -= cilen; /* Adjust remaining length */
donatien	0:632c9925f013	1274	next += cilen; /* Step to next CI */
donatien	0:632c9925f013	1275
donatien	0:632c9925f013	1276	switch (citype) { /* Check CI type */
donatien	0:632c9925f013	1277	case CI_MRU:
donatien	0:632c9925f013	1278	if (!ao->neg_mru) { /* Allow option? */
donatien	0:632c9925f013	1279	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - not allowed\n"));
donatien	0:632c9925f013	1280	orc = CONFREJ; /* Reject CI */
donatien	0:632c9925f013	1281	break;
donatien	0:632c9925f013	1282	} else if (cilen != CILEN_SHORT) { /* Check CI length */
donatien	0:632c9925f013	1283	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - bad length\n"));
donatien	0:632c9925f013	1284	orc = CONFREJ; /* Reject CI */
donatien	0:632c9925f013	1285	break;
donatien	0:632c9925f013	1286	}
donatien	0:632c9925f013	1287	GETSHORT(cishort, p); /* Parse MRU */
donatien	0:632c9925f013	1288
donatien	0:632c9925f013	1289	/*
donatien	0:632c9925f013	1290	* He must be able to receive at least our minimum.
donatien	0:632c9925f013	1291	* No need to check a maximum. If he sends a large number,
donatien	0:632c9925f013	1292	* we'll just ignore it.
donatien	0:632c9925f013	1293	*/
donatien	0:632c9925f013	1294	if (cishort < PPP_MINMRU) {
donatien	0:632c9925f013	1295	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak - MRU too small\n"));
donatien	0:632c9925f013	1296	orc = CONFNAK; /* Nak CI */
donatien	0:632c9925f013	1297	PUTCHAR(CI_MRU, nakp);
donatien	0:632c9925f013	1298	PUTCHAR(CILEN_SHORT, nakp);
donatien	0:632c9925f013	1299	PUTSHORT(PPP_MINMRU, nakp); /* Give him a hint */
donatien	0:632c9925f013	1300	break;
donatien	0:632c9925f013	1301	}
donatien	0:632c9925f013	1302	ho->neg_mru = 1; /* Remember he sent MRU */
donatien	0:632c9925f013	1303	ho->mru = cishort; /* And remember value */
donatien	0:632c9925f013	1304	#if TRACELCP > 0
donatien	0:632c9925f013	1305	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MRU %d", cishort);
donatien	0:632c9925f013	1306	traceNdx = strlen(traceBuf);
donatien	0:632c9925f013	1307	#endif
donatien	0:632c9925f013	1308	break;
donatien	0:632c9925f013	1309
donatien	0:632c9925f013	1310	case CI_ASYNCMAP:
donatien	0:632c9925f013	1311	if (!ao->neg_asyncmap) {
donatien	0:632c9925f013	1312	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP not allowed\n"));
donatien	0:632c9925f013	1313	orc = CONFREJ;
donatien	0:632c9925f013	1314	break;
donatien	0:632c9925f013	1315	} else if (cilen != CILEN_LONG) {
donatien	0:632c9925f013	1316	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP bad length\n"));
donatien	0:632c9925f013	1317	orc = CONFREJ;
donatien	0:632c9925f013	1318	break;
donatien	0:632c9925f013	1319	}
donatien	0:632c9925f013	1320	GETLONG(cilong, p);
donatien	0:632c9925f013	1321
donatien	0:632c9925f013	1322	/*
donatien	0:632c9925f013	1323	* Asyncmap must have set at least the bits
donatien	0:632c9925f013	1324	* which are set in lcp_allowoptions[unit].asyncmap.
donatien	0:632c9925f013	1325	*/
donatien	0:632c9925f013	1326	if ((ao->asyncmap & ~cilong) != 0) {
donatien	0:632c9925f013	1327	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak ASYNCMAP %lX missing %lX\n",
donatien	0:632c9925f013	1328	cilong, ao->asyncmap));
donatien	0:632c9925f013	1329	orc = CONFNAK;
donatien	0:632c9925f013	1330	PUTCHAR(CI_ASYNCMAP, nakp);
donatien	0:632c9925f013	1331	PUTCHAR(CILEN_LONG, nakp);
donatien	0:632c9925f013	1332	PUTLONG(ao->asyncmap \| cilong, nakp);
donatien	0:632c9925f013	1333	break;
donatien	0:632c9925f013	1334	}
donatien	0:632c9925f013	1335	ho->neg_asyncmap = 1;
donatien	0:632c9925f013	1336	ho->asyncmap = cilong;
donatien	0:632c9925f013	1337	#if TRACELCP > 0
donatien	0:632c9925f013	1338	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ASYNCMAP=%lX", cilong);
donatien	0:632c9925f013	1339	traceNdx = strlen(traceBuf);
donatien	0:632c9925f013	1340	#endif
donatien	0:632c9925f013	1341	break;
donatien	0:632c9925f013	1342
donatien	0:632c9925f013	1343	case CI_AUTHTYPE:
donatien	0:632c9925f013	1344	if (cilen < CILEN_SHORT) {
donatien	0:632c9925f013	1345	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE missing arg\n"));
donatien	0:632c9925f013	1346	orc = CONFREJ;
donatien	0:632c9925f013	1347	break;
donatien	0:632c9925f013	1348	} else if (!(ao->neg_upap \|\| ao->neg_chap)) {
donatien	0:632c9925f013	1349	/*
donatien	0:632c9925f013	1350	* Reject the option if we're not willing to authenticate.
donatien	0:632c9925f013	1351	*/
donatien	0:632c9925f013	1352	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE not allowed\n"));
donatien	0:632c9925f013	1353	orc = CONFREJ;
donatien	0:632c9925f013	1354	break;
donatien	0:632c9925f013	1355	}
donatien	0:632c9925f013	1356	GETSHORT(cishort, p);
donatien	0:632c9925f013	1357
donatien	0:632c9925f013	1358	/*
donatien	0:632c9925f013	1359	* Authtype must be UPAP or CHAP.
donatien	0:632c9925f013	1360	*
donatien	0:632c9925f013	1361	* Note: if both ao->neg_upap and ao->neg_chap are set,
donatien	0:632c9925f013	1362	* and the peer sends a Configure-Request with two
donatien	0:632c9925f013	1363	* authenticate-protocol requests, one for CHAP and one
donatien	0:632c9925f013	1364	* for UPAP, then we will reject the second request.
donatien	0:632c9925f013	1365	* Whether we end up doing CHAP or UPAP depends then on
donatien	0:632c9925f013	1366	* the ordering of the CIs in the peer's Configure-Request.
donatien	0:632c9925f013	1367	*/
donatien	0:632c9925f013	1368
donatien	0:632c9925f013	1369	if (cishort == PPP_PAP) {
donatien	0:632c9925f013	1370	if (ho->neg_chap) { /* we've already accepted CHAP */
donatien	0:632c9925f013	1371	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP already accepted\n"));
donatien	0:632c9925f013	1372	orc = CONFREJ;
donatien	0:632c9925f013	1373	break;
donatien	0:632c9925f013	1374	} else if (cilen != CILEN_SHORT) {
donatien	0:632c9925f013	1375	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP bad len\n"));
donatien	0:632c9925f013	1376	orc = CONFREJ;
donatien	0:632c9925f013	1377	break;
donatien	0:632c9925f013	1378	}
donatien	0:632c9925f013	1379	if (!ao->neg_upap) { /* we don't want to do PAP */
donatien	0:632c9925f013	1380	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE PAP not allowed\n"));
donatien	0:632c9925f013	1381	orc = CONFNAK; /* NAK it and suggest CHAP */
donatien	0:632c9925f013	1382	PUTCHAR(CI_AUTHTYPE, nakp);
donatien	0:632c9925f013	1383	PUTCHAR(CILEN_CHAP, nakp);
donatien	0:632c9925f013	1384	PUTSHORT(PPP_CHAP, nakp);
donatien	0:632c9925f013	1385	PUTCHAR(ao->chap_mdtype, nakp);
donatien	0:632c9925f013	1386	break;
donatien	0:632c9925f013	1387	}
donatien	0:632c9925f013	1388	ho->neg_upap = 1;
donatien	0:632c9925f013	1389	#if TRACELCP > 0
donatien	0:632c9925f013	1390	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PAP (%X)", cishort);
donatien	0:632c9925f013	1391	traceNdx = strlen(traceBuf);
donatien	0:632c9925f013	1392	#endif
donatien	0:632c9925f013	1393	break;
donatien	0:632c9925f013	1394	}
donatien	0:632c9925f013	1395	if (cishort == PPP_CHAP) {
donatien	0:632c9925f013	1396	if (ho->neg_upap) { /* we've already accepted PAP */
donatien	0:632c9925f013	1397	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP accepted PAP\n"));
donatien	0:632c9925f013	1398	orc = CONFREJ;
donatien	0:632c9925f013	1399	break;
donatien	0:632c9925f013	1400	} else if (cilen != CILEN_CHAP) {
donatien	0:632c9925f013	1401	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP bad len\n"));
donatien	0:632c9925f013	1402	orc = CONFREJ;
donatien	0:632c9925f013	1403	break;
donatien	0:632c9925f013	1404	}
donatien	0:632c9925f013	1405	if (!ao->neg_chap) { /* we don't want to do CHAP */
donatien	0:632c9925f013	1406	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP not allowed\n"));
donatien	0:632c9925f013	1407	orc = CONFNAK; /* NAK it and suggest PAP */
donatien	0:632c9925f013	1408	PUTCHAR(CI_AUTHTYPE, nakp);
donatien	0:632c9925f013	1409	PUTCHAR(CILEN_SHORT, nakp);
donatien	0:632c9925f013	1410	PUTSHORT(PPP_PAP, nakp);
donatien	0:632c9925f013	1411	break;
donatien	0:632c9925f013	1412	}
donatien	0:632c9925f013	1413	GETCHAR(cichar, p); /* get digest type*/
donatien	0:632c9925f013	1414	if (cichar != CHAP_DIGEST_MD5
donatien	0:632c9925f013	1415	#if MSCHAP_SUPPORT
donatien	0:632c9925f013	1416	&& cichar != CHAP_MICROSOFT
donatien	0:632c9925f013	1417	#endif
donatien	0:632c9925f013	1418	) {
donatien	0:632c9925f013	1419	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP digest=%d\n", (int)cichar));
donatien	0:632c9925f013	1420	orc = CONFNAK;
donatien	0:632c9925f013	1421	PUTCHAR(CI_AUTHTYPE, nakp);
donatien	0:632c9925f013	1422	PUTCHAR(CILEN_CHAP, nakp);
donatien	0:632c9925f013	1423	PUTSHORT(PPP_CHAP, nakp);
donatien	0:632c9925f013	1424	PUTCHAR(ao->chap_mdtype, nakp);
donatien	0:632c9925f013	1425	break;
donatien	0:632c9925f013	1426	}
donatien	0:632c9925f013	1427	#if TRACELCP > 0
donatien	0:632c9925f013	1428	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CHAP %X,%d", cishort, (int)cichar);
donatien	0:632c9925f013	1429	traceNdx = strlen(traceBuf);
donatien	0:632c9925f013	1430	#endif
donatien	0:632c9925f013	1431	ho->chap_mdtype = cichar; /* save md type */
donatien	0:632c9925f013	1432	ho->neg_chap = 1;
donatien	0:632c9925f013	1433	break;
donatien	0:632c9925f013	1434	}
donatien	0:632c9925f013	1435
donatien	0:632c9925f013	1436	/*
donatien	0:632c9925f013	1437	* We don't recognize the protocol they're asking for.
donatien	0:632c9925f013	1438	* Nak it with something we're willing to do.
donatien	0:632c9925f013	1439	* (At this point we know ao->neg_upap \|\| ao->neg_chap.)
donatien	0:632c9925f013	1440	*/
donatien	0:632c9925f013	1441	orc = CONFNAK;
donatien	0:632c9925f013	1442	PUTCHAR(CI_AUTHTYPE, nakp);
donatien	0:632c9925f013	1443	if (ao->neg_chap) {
donatien	0:632c9925f013	1444	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req CHAP\n", cishort));
donatien	0:632c9925f013	1445	PUTCHAR(CILEN_CHAP, nakp);
donatien	0:632c9925f013	1446	PUTSHORT(PPP_CHAP, nakp);
donatien	0:632c9925f013	1447	PUTCHAR(ao->chap_mdtype, nakp);
donatien	0:632c9925f013	1448	} else {
donatien	0:632c9925f013	1449	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req PAP\n", cishort));
donatien	0:632c9925f013	1450	PUTCHAR(CILEN_SHORT, nakp);
donatien	0:632c9925f013	1451	PUTSHORT(PPP_PAP, nakp);
donatien	0:632c9925f013	1452	}
donatien	0:632c9925f013	1453	break;
donatien	0:632c9925f013	1454
donatien	0:632c9925f013	1455	case CI_QUALITY:
donatien	0:632c9925f013	1456	GETSHORT(cishort, p);
donatien	0:632c9925f013	1457	GETLONG(cilong, p);
donatien	0:632c9925f013	1458	#if TRACELCP > 0
donatien	0:632c9925f013	1459	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " QUALITY (%x %x)", cishort, (unsigned int) cilong);
donatien	0:632c9925f013	1460	traceNdx = strlen(traceBuf);
donatien	0:632c9925f013	1461	#endif
donatien	0:632c9925f013	1462
donatien	0:632c9925f013	1463	if (!ao->neg_lqr \|\|
donatien	0:632c9925f013	1464	cilen != CILEN_LQR) {
donatien	0:632c9925f013	1465	orc = CONFREJ;
donatien	0:632c9925f013	1466	break;
donatien	0:632c9925f013	1467	}
donatien	0:632c9925f013	1468
donatien	0:632c9925f013	1469	/*
donatien	0:632c9925f013	1470	* Check the protocol and the reporting period.
donatien	0:632c9925f013	1471	* XXX When should we Nak this, and what with?
donatien	0:632c9925f013	1472	*/
donatien	0:632c9925f013	1473	if (cishort != PPP_LQR) {
donatien	0:632c9925f013	1474	orc = CONFNAK;
donatien	0:632c9925f013	1475	PUTCHAR(CI_QUALITY, nakp);
donatien	0:632c9925f013	1476	PUTCHAR(CILEN_LQR, nakp);
donatien	0:632c9925f013	1477	PUTSHORT(PPP_LQR, nakp);
donatien	0:632c9925f013	1478	PUTLONG(ao->lqr_period, nakp);
donatien	0:632c9925f013	1479	break;
donatien	0:632c9925f013	1480	}
donatien	0:632c9925f013	1481	break;
donatien	0:632c9925f013	1482
donatien	0:632c9925f013	1483	case CI_MAGICNUMBER:
donatien	0:632c9925f013	1484	if (!(ao->neg_magicnumber \|\| go->neg_magicnumber) \|\|
donatien	0:632c9925f013	1485	cilen != CILEN_LONG) {
donatien	0:632c9925f013	1486	orc = CONFREJ;
donatien	0:632c9925f013	1487	break;
donatien	0:632c9925f013	1488	}
donatien	0:632c9925f013	1489	GETLONG(cilong, p);
donatien	0:632c9925f013	1490	#if TRACELCP > 0
donatien	0:632c9925f013	1491	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MAGICNUMBER (%lX)", cilong);
donatien	0:632c9925f013	1492	traceNdx = strlen(traceBuf);
donatien	0:632c9925f013	1493	#endif
donatien	0:632c9925f013	1494
donatien	0:632c9925f013	1495	/*
donatien	0:632c9925f013	1496	* He must have a different magic number.
donatien	0:632c9925f013	1497	*/
donatien	0:632c9925f013	1498	if (go->neg_magicnumber &&
donatien	0:632c9925f013	1499	cilong == go->magicnumber) {
donatien	0:632c9925f013	1500	cilong = magic(); /* Don't put magic() inside macro! */
donatien	0:632c9925f013	1501	orc = CONFNAK;
donatien	0:632c9925f013	1502	PUTCHAR(CI_MAGICNUMBER, nakp);
donatien	0:632c9925f013	1503	PUTCHAR(CILEN_LONG, nakp);
donatien	0:632c9925f013	1504	PUTLONG(cilong, nakp);
donatien	0:632c9925f013	1505	break;
donatien	0:632c9925f013	1506	}
donatien	0:632c9925f013	1507	ho->neg_magicnumber = 1;
donatien	0:632c9925f013	1508	ho->magicnumber = cilong;
donatien	0:632c9925f013	1509	break;
donatien	0:632c9925f013	1510
donatien	0:632c9925f013	1511
donatien	0:632c9925f013	1512	case CI_PCOMPRESSION:
donatien	0:632c9925f013	1513	#if TRACELCP > 0
donatien	0:632c9925f013	1514	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PCOMPRESSION");
donatien	0:632c9925f013	1515	traceNdx = strlen(traceBuf);
donatien	0:632c9925f013	1516	#endif
donatien	0:632c9925f013	1517	if (!ao->neg_pcompression \|\|
donatien	0:632c9925f013	1518	cilen != CILEN_VOID) {
donatien	0:632c9925f013	1519	orc = CONFREJ;
donatien	0:632c9925f013	1520	break;
donatien	0:632c9925f013	1521	}
donatien	0:632c9925f013	1522	ho->neg_pcompression = 1;
donatien	0:632c9925f013	1523	break;
donatien	0:632c9925f013	1524
donatien	0:632c9925f013	1525	case CI_ACCOMPRESSION:
donatien	0:632c9925f013	1526	#if TRACELCP > 0
donatien	0:632c9925f013	1527	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ACCOMPRESSION");
donatien	0:632c9925f013	1528	traceNdx = strlen(traceBuf);
donatien	0:632c9925f013	1529	#endif
donatien	0:632c9925f013	1530	if (!ao->neg_accompression \|\|
donatien	0:632c9925f013	1531	cilen != CILEN_VOID) {
donatien	0:632c9925f013	1532	orc = CONFREJ;
donatien	0:632c9925f013	1533	break;
donatien	0:632c9925f013	1534	}
donatien	0:632c9925f013	1535	ho->neg_accompression = 1;
donatien	0:632c9925f013	1536	break;
donatien	0:632c9925f013	1537
donatien	0:632c9925f013	1538	case CI_MRRU:
donatien	0:632c9925f013	1539	#if TRACELCP > 0
donatien	0:632c9925f013	1540	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_MRRU");
donatien	0:632c9925f013	1541	traceNdx = strlen(traceBuf);
donatien	0:632c9925f013	1542	#endif
donatien	0:632c9925f013	1543	orc = CONFREJ;
donatien	0:632c9925f013	1544	break;
donatien	0:632c9925f013	1545
donatien	0:632c9925f013	1546	case CI_SSNHF:
donatien	0:632c9925f013	1547	#if TRACELCP > 0
donatien	0:632c9925f013	1548	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_SSNHF");
donatien	0:632c9925f013	1549	traceNdx = strlen(traceBuf);
donatien	0:632c9925f013	1550	#endif
donatien	0:632c9925f013	1551	orc = CONFREJ;
donatien	0:632c9925f013	1552	break;
donatien	0:632c9925f013	1553
donatien	0:632c9925f013	1554	case CI_EPDISC:
donatien	0:632c9925f013	1555	#if TRACELCP > 0
donatien	0:632c9925f013	1556	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_EPDISC");
donatien	0:632c9925f013	1557	traceNdx = strlen(traceBuf);
donatien	0:632c9925f013	1558	#endif
donatien	0:632c9925f013	1559	orc = CONFREJ;
donatien	0:632c9925f013	1560	break;
donatien	0:632c9925f013	1561
donatien	0:632c9925f013	1562	default:
donatien	0:632c9925f013	1563	#if TRACELCP
donatien	0:632c9925f013	1564	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " unknown %d", citype);
donatien	0:632c9925f013	1565	traceNdx = strlen(traceBuf);
donatien	0:632c9925f013	1566	#endif
donatien	0:632c9925f013	1567	orc = CONFREJ;
donatien	0:632c9925f013	1568	break;
donatien	0:632c9925f013	1569	}
donatien	0:632c9925f013	1570
donatien	0:632c9925f013	1571	endswitch:
donatien	0:632c9925f013	1572	#if TRACELCP
donatien	0:632c9925f013	1573	if (traceNdx >= 80 - 32) {
donatien	0:632c9925f013	1574	LCPDEBUG(LOG_INFO, ("lcp_reqci: rcvd%s\n", traceBuf));
donatien	0:632c9925f013	1575	traceNdx = 0;
donatien	0:632c9925f013	1576	}
donatien	0:632c9925f013	1577	#endif
donatien	0:632c9925f013	1578	if (orc == CONFACK && /* Good CI */
donatien	0:632c9925f013	1579	rc != CONFACK) { /* but prior CI wasnt? */
donatien	0:632c9925f013	1580	continue; /* Don't send this one */
donatien	0:632c9925f013	1581	}
donatien	0:632c9925f013	1582
donatien	0:632c9925f013	1583	if (orc == CONFNAK) { /* Nak this CI? */
donatien	0:632c9925f013	1584	if (reject_if_disagree /* Getting fed up with sending NAKs? */
donatien	0:632c9925f013	1585	&& citype != CI_MAGICNUMBER) {
donatien	0:632c9925f013	1586	orc = CONFREJ; /* Get tough if so */
donatien	0:632c9925f013	1587	} else {
donatien	0:632c9925f013	1588	if (rc == CONFREJ) { /* Rejecting prior CI? */
donatien	0:632c9925f013	1589	continue; /* Don't send this one */
donatien	0:632c9925f013	1590	}
donatien	0:632c9925f013	1591	rc = CONFNAK;
donatien	0:632c9925f013	1592	}
donatien	0:632c9925f013	1593	}
donatien	0:632c9925f013	1594	if (orc == CONFREJ) { /* Reject this CI */
donatien	0:632c9925f013	1595	rc = CONFREJ;
donatien	0:632c9925f013	1596	if (cip != rejp) { /* Need to move rejected CI? */
donatien	0:632c9925f013	1597	BCOPY(cip, rejp, cilen); /* Move it */
donatien	0:632c9925f013	1598	}
donatien	0:632c9925f013	1599	INCPTR(cilen, rejp); /* Update output pointer */
donatien	0:632c9925f013	1600	}
donatien	0:632c9925f013	1601	}
donatien	0:632c9925f013	1602
donatien	0:632c9925f013	1603	/*
donatien	0:632c9925f013	1604	* If we wanted to send additional NAKs (for unsent CIs), the
donatien	0:632c9925f013	1605	* code would go here. The extra NAKs would go at *nakp.
donatien	0:632c9925f013	1606	* At present there are no cases where we want to ask the
donatien	0:632c9925f013	1607	* peer to negotiate an option.
donatien	0:632c9925f013	1608	*/
donatien	0:632c9925f013	1609
donatien	0:632c9925f013	1610	switch (rc) {
donatien	0:632c9925f013	1611	case CONFACK:
donatien	0:632c9925f013	1612	*lenp = (int)(next - inp);
donatien	0:632c9925f013	1613	break;
donatien	0:632c9925f013	1614	case CONFNAK:
donatien	0:632c9925f013	1615	/*
donatien	0:632c9925f013	1616	* Copy the Nak'd options from the nak_buffer to the caller's buffer.
donatien	0:632c9925f013	1617	*/
donatien	0:632c9925f013	1618	*lenp = (int)(nakp - nak_buffer);
donatien	0:632c9925f013	1619	BCOPY(nak_buffer, inp, *lenp);
donatien	0:632c9925f013	1620	break;
donatien	0:632c9925f013	1621	case CONFREJ:
donatien	0:632c9925f013	1622	*lenp = (int)(rejp - inp);
donatien	0:632c9925f013	1623	break;
donatien	0:632c9925f013	1624	}
donatien	0:632c9925f013	1625
donatien	0:632c9925f013	1626	#if TRACELCP > 0
donatien	0:632c9925f013	1627	if (traceNdx > 0) {
donatien	0:632c9925f013	1628	LCPDEBUG(LOG_INFO, ("lcp_reqci: %s\n", traceBuf));
donatien	0:632c9925f013	1629	}
donatien	0:632c9925f013	1630	#endif
donatien	0:632c9925f013	1631	LCPDEBUG(LOG_INFO, ("lcp_reqci: returning CONF%s.\n", CODENAME(rc)));
donatien	0:632c9925f013	1632	return (rc); /* Return final code */
donatien	0:632c9925f013	1633	}
donatien	0:632c9925f013	1634
donatien	0:632c9925f013	1635
donatien	0:632c9925f013	1636	/*
donatien	0:632c9925f013	1637	* lcp_up - LCP has come UP.
donatien	0:632c9925f013	1638	*/
donatien	0:632c9925f013	1639	static void
donatien	0:632c9925f013	1640	lcp_up(fsm *f)
donatien	0:632c9925f013	1641	{
donatien	0:632c9925f013	1642	lcp_options *wo = &lcp_wantoptions[f->unit];
donatien	0:632c9925f013	1643	lcp_options *ho = &lcp_hisoptions[f->unit];
donatien	0:632c9925f013	1644	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:632c9925f013	1645	lcp_options *ao = &lcp_allowoptions[f->unit];
donatien	0:632c9925f013	1646
donatien	0:632c9925f013	1647	if (!go->neg_magicnumber) {
donatien	0:632c9925f013	1648	go->magicnumber = 0;
donatien	0:632c9925f013	1649	}
donatien	0:632c9925f013	1650	if (!ho->neg_magicnumber) {
donatien	0:632c9925f013	1651	ho->magicnumber = 0;
donatien	0:632c9925f013	1652	}
donatien	0:632c9925f013	1653
donatien	0:632c9925f013	1654	/*
donatien	0:632c9925f013	1655	* Set our MTU to the smaller of the MTU we wanted and
donatien	0:632c9925f013	1656	* the MRU our peer wanted. If we negotiated an MRU,
donatien	0:632c9925f013	1657	* set our MRU to the larger of value we wanted and
donatien	0:632c9925f013	1658	* the value we got in the negotiation.
donatien	0:632c9925f013	1659	*/
donatien	0:632c9925f013	1660	ppp_send_config(f->unit, LWIP_MIN(ao->mru, (ho->neg_mru? ho->mru: PPP_MRU)),
donatien	0:632c9925f013	1661	(ho->neg_asyncmap? ho->asyncmap: 0xffffffffl),
donatien	0:632c9925f013	1662	ho->neg_pcompression, ho->neg_accompression);
donatien	0:632c9925f013	1663	/*
donatien	0:632c9925f013	1664	* If the asyncmap hasn't been negotiated, we really should
donatien	0:632c9925f013	1665	* set the receive asyncmap to ffffffff, but we set it to 0
donatien	0:632c9925f013	1666	* for backwards contemptibility.
donatien	0:632c9925f013	1667	*/
donatien	0:632c9925f013	1668	ppp_recv_config(f->unit, (go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU),
donatien	0:632c9925f013	1669	(go->neg_asyncmap? go->asyncmap: 0x00000000),
donatien	0:632c9925f013	1670	go->neg_pcompression, go->neg_accompression);
donatien	0:632c9925f013	1671
donatien	0:632c9925f013	1672	if (ho->neg_mru) {
donatien	0:632c9925f013	1673	peer_mru[f->unit] = ho->mru;
donatien	0:632c9925f013	1674	}
donatien	0:632c9925f013	1675
donatien	0:632c9925f013	1676	lcp_echo_lowerup(f->unit); /* Enable echo messages */
donatien	0:632c9925f013	1677
donatien	0:632c9925f013	1678	link_established(f->unit); /* The link is up; authenticate now */
donatien	0:632c9925f013	1679	}
donatien	0:632c9925f013	1680
donatien	0:632c9925f013	1681
donatien	0:632c9925f013	1682	/*
donatien	0:632c9925f013	1683	* lcp_down - LCP has gone DOWN.
donatien	0:632c9925f013	1684	*
donatien	0:632c9925f013	1685	* Alert other protocols.
donatien	0:632c9925f013	1686	*/
donatien	0:632c9925f013	1687	static void
donatien	0:632c9925f013	1688	lcp_down(fsm *f)
donatien	0:632c9925f013	1689	{
donatien	0:632c9925f013	1690	lcp_options *go = &lcp_gotoptions[f->unit];
donatien	0:632c9925f013	1691
donatien	0:632c9925f013	1692	lcp_echo_lowerdown(f->unit);
donatien	0:632c9925f013	1693
donatien	0:632c9925f013	1694	link_down(f->unit);
donatien	0:632c9925f013	1695
donatien	0:632c9925f013	1696	ppp_send_config(f->unit, PPP_MRU, 0xffffffffl, 0, 0);
donatien	0:632c9925f013	1697	ppp_recv_config(f->unit, PPP_MRU,
donatien	0:632c9925f013	1698	(go->neg_asyncmap? go->asyncmap: 0x00000000),
donatien	0:632c9925f013	1699	go->neg_pcompression, go->neg_accompression);
donatien	0:632c9925f013	1700	peer_mru[f->unit] = PPP_MRU;
donatien	0:632c9925f013	1701	}
donatien	0:632c9925f013	1702
donatien	0:632c9925f013	1703
donatien	0:632c9925f013	1704	/*
donatien	0:632c9925f013	1705	* lcp_starting - LCP needs the lower layer up.
donatien	0:632c9925f013	1706	*/
donatien	0:632c9925f013	1707	static void
donatien	0:632c9925f013	1708	lcp_starting(fsm *f)
donatien	0:632c9925f013	1709	{
donatien	0:632c9925f013	1710	link_required(f->unit); /* lwip: currently does nothing */
donatien	0:632c9925f013	1711	}
donatien	0:632c9925f013	1712
donatien	0:632c9925f013	1713
donatien	0:632c9925f013	1714	/*
donatien	0:632c9925f013	1715	* lcp_finished - LCP has finished with the lower layer.
donatien	0:632c9925f013	1716	*/
donatien	0:632c9925f013	1717	static void
donatien	0:632c9925f013	1718	lcp_finished(fsm *f)
donatien	0:632c9925f013	1719	{
donatien	0:632c9925f013	1720	link_terminated(f->unit); /* we are finished with the link */
donatien	0:632c9925f013	1721	}
donatien	0:632c9925f013	1722
donatien	0:632c9925f013	1723
donatien	0:632c9925f013	1724	#if PPP_ADDITIONAL_CALLBACKS
donatien	0:632c9925f013	1725	/*
donatien	0:632c9925f013	1726	* print_string - print a readable representation of a string using
donatien	0:632c9925f013	1727	* printer.
donatien	0:632c9925f013	1728	*/
donatien	0:632c9925f013	1729	static void
donatien	0:632c9925f013	1730	print_string( char p, int len, void (printer) (void , char , ...), void *arg)
donatien	0:632c9925f013	1731	{
donatien	0:632c9925f013	1732	int c;
donatien	0:632c9925f013	1733
donatien	0:632c9925f013	1734	printer(arg, "\"");
donatien	0:632c9925f013	1735	for (; len > 0; --len) {
donatien	0:632c9925f013	1736	c = *p++;
donatien	0:632c9925f013	1737	if (' ' <= c && c <= '~') {
donatien	0:632c9925f013	1738	if (c == '\\' \|\| c == '"') {
donatien	0:632c9925f013	1739	printer(arg, "\\");
donatien	0:632c9925f013	1740	}
donatien	0:632c9925f013	1741	printer(arg, "%c", c);
donatien	0:632c9925f013	1742	} else {
donatien	0:632c9925f013	1743	switch (c) {
donatien	0:632c9925f013	1744	case '\n':
donatien	0:632c9925f013	1745	printer(arg, "\\n");
donatien	0:632c9925f013	1746	break;
donatien	0:632c9925f013	1747	case '\r':
donatien	0:632c9925f013	1748	printer(arg, "\\r");
donatien	0:632c9925f013	1749	break;
donatien	0:632c9925f013	1750	case '\t':
donatien	0:632c9925f013	1751	printer(arg, "\\t");
donatien	0:632c9925f013	1752	break;
donatien	0:632c9925f013	1753	default:
donatien	0:632c9925f013	1754	printer(arg, "\\%.3o", c);
donatien	0:632c9925f013	1755	}
donatien	0:632c9925f013	1756	}
donatien	0:632c9925f013	1757	}
donatien	0:632c9925f013	1758	printer(arg, "\"");
donatien	0:632c9925f013	1759	}
donatien	0:632c9925f013	1760
donatien	0:632c9925f013	1761
donatien	0:632c9925f013	1762	/*
donatien	0:632c9925f013	1763	* lcp_printpkt - print the contents of an LCP packet.
donatien	0:632c9925f013	1764	*/
donatien	0:632c9925f013	1765	static char *lcp_codenames[] = {
donatien	0:632c9925f013	1766	"ConfReq", "ConfAck", "ConfNak", "ConfRej",
donatien	0:632c9925f013	1767	"TermReq", "TermAck", "CodeRej", "ProtRej",
donatien	0:632c9925f013	1768	"EchoReq", "EchoRep", "DiscReq"
donatien	0:632c9925f013	1769	};
donatien	0:632c9925f013	1770
donatien	0:632c9925f013	1771	static int
donatien	0:632c9925f013	1772	lcp_printpkt( u_char p, int plen, void (printer) (void , char , ...), void *arg)
donatien	0:632c9925f013	1773	{
donatien	0:632c9925f013	1774	int code, id, len, olen;
donatien	0:632c9925f013	1775	u_char pstart, optend;
donatien	0:632c9925f013	1776	u_short cishort;
donatien	0:632c9925f013	1777	u32_t cilong;
donatien	0:632c9925f013	1778
donatien	0:632c9925f013	1779	if (plen < HEADERLEN) {
donatien	0:632c9925f013	1780	return 0;
donatien	0:632c9925f013	1781	}
donatien	0:632c9925f013	1782	pstart = p;
donatien	0:632c9925f013	1783	GETCHAR(code, p);
donatien	0:632c9925f013	1784	GETCHAR(id, p);
donatien	0:632c9925f013	1785	GETSHORT(len, p);
donatien	0:632c9925f013	1786	if (len < HEADERLEN \|\| len > plen) {
donatien	0:632c9925f013	1787	return 0;
donatien	0:632c9925f013	1788	}
donatien	0:632c9925f013	1789
donatien	0:632c9925f013	1790	if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *)) {
donatien	0:632c9925f013	1791	printer(arg, " %s", lcp_codenames[code-1]);
donatien	0:632c9925f013	1792	} else {
donatien	0:632c9925f013	1793	printer(arg, " code=0x%x", code);
donatien	0:632c9925f013	1794	}
donatien	0:632c9925f013	1795	printer(arg, " id=0x%x", id);
donatien	0:632c9925f013	1796	len -= HEADERLEN;
donatien	0:632c9925f013	1797	switch (code) {
donatien	0:632c9925f013	1798	case CONFREQ:
donatien	0:632c9925f013	1799	case CONFACK:
donatien	0:632c9925f013	1800	case CONFNAK:
donatien	0:632c9925f013	1801	case CONFREJ:
donatien	0:632c9925f013	1802	/* print option list */
donatien	0:632c9925f013	1803	while (len >= 2) {
donatien	0:632c9925f013	1804	GETCHAR(code, p);
donatien	0:632c9925f013	1805	GETCHAR(olen, p);
donatien	0:632c9925f013	1806	p -= 2;
donatien	0:632c9925f013	1807	if (olen < 2 \|\| olen > len) {
donatien	0:632c9925f013	1808	break;
donatien	0:632c9925f013	1809	}
donatien	0:632c9925f013	1810	printer(arg, " <");
donatien	0:632c9925f013	1811	len -= olen;
donatien	0:632c9925f013	1812	optend = p + olen;
donatien	0:632c9925f013	1813	switch (code) {
donatien	0:632c9925f013	1814	case CI_MRU:
donatien	0:632c9925f013	1815	if (olen == CILEN_SHORT) {
donatien	0:632c9925f013	1816	p += 2;
donatien	0:632c9925f013	1817	GETSHORT(cishort, p);
donatien	0:632c9925f013	1818	printer(arg, "mru %d", cishort);
donatien	0:632c9925f013	1819	}
donatien	0:632c9925f013	1820	break;
donatien	0:632c9925f013	1821	case CI_ASYNCMAP:
donatien	0:632c9925f013	1822	if (olen == CILEN_LONG) {
donatien	0:632c9925f013	1823	p += 2;
donatien	0:632c9925f013	1824	GETLONG(cilong, p);
donatien	0:632c9925f013	1825	printer(arg, "asyncmap 0x%lx", cilong);
donatien	0:632c9925f013	1826	}
donatien	0:632c9925f013	1827	break;
donatien	0:632c9925f013	1828	case CI_AUTHTYPE:
donatien	0:632c9925f013	1829	if (olen >= CILEN_SHORT) {
donatien	0:632c9925f013	1830	p += 2;
donatien	0:632c9925f013	1831	printer(arg, "auth ");
donatien	0:632c9925f013	1832	GETSHORT(cishort, p);
donatien	0:632c9925f013	1833	switch (cishort) {
donatien	0:632c9925f013	1834	case PPP_PAP:
donatien	0:632c9925f013	1835	printer(arg, "pap");
donatien	0:632c9925f013	1836	break;
donatien	0:632c9925f013	1837	case PPP_CHAP:
donatien	0:632c9925f013	1838	printer(arg, "chap");
donatien	0:632c9925f013	1839	break;
donatien	0:632c9925f013	1840	default:
donatien	0:632c9925f013	1841	printer(arg, "0x%x", cishort);
donatien	0:632c9925f013	1842	}
donatien	0:632c9925f013	1843	}
donatien	0:632c9925f013	1844	break;
donatien	0:632c9925f013	1845	case CI_QUALITY:
donatien	0:632c9925f013	1846	if (olen >= CILEN_SHORT) {
donatien	0:632c9925f013	1847	p += 2;
donatien	0:632c9925f013	1848	printer(arg, "quality ");
donatien	0:632c9925f013	1849	GETSHORT(cishort, p);
donatien	0:632c9925f013	1850	switch (cishort) {
donatien	0:632c9925f013	1851	case PPP_LQR:
donatien	0:632c9925f013	1852	printer(arg, "lqr");
donatien	0:632c9925f013	1853	break;
donatien	0:632c9925f013	1854	default:
donatien	0:632c9925f013	1855	printer(arg, "0x%x", cishort);
donatien	0:632c9925f013	1856	}
donatien	0:632c9925f013	1857	}
donatien	0:632c9925f013	1858	break;
donatien	0:632c9925f013	1859	case CI_CALLBACK:
donatien	0:632c9925f013	1860	if (olen >= CILEN_CHAR) {
donatien	0:632c9925f013	1861	p += 2;
donatien	0:632c9925f013	1862	printer(arg, "callback ");
donatien	0:632c9925f013	1863	GETSHORT(cishort, p);
donatien	0:632c9925f013	1864	switch (cishort) {
donatien	0:632c9925f013	1865	case CBCP_OPT:
donatien	0:632c9925f013	1866	printer(arg, "CBCP");
donatien	0:632c9925f013	1867	break;
donatien	0:632c9925f013	1868	default:
donatien	0:632c9925f013	1869	printer(arg, "0x%x", cishort);
donatien	0:632c9925f013	1870	}
donatien	0:632c9925f013	1871	}
donatien	0:632c9925f013	1872	break;
donatien	0:632c9925f013	1873	case CI_MAGICNUMBER:
donatien	0:632c9925f013	1874	if (olen == CILEN_LONG) {
donatien	0:632c9925f013	1875	p += 2;
donatien	0:632c9925f013	1876	GETLONG(cilong, p);
donatien	0:632c9925f013	1877	printer(arg, "magic 0x%x", cilong);
donatien	0:632c9925f013	1878	}
donatien	0:632c9925f013	1879	break;
donatien	0:632c9925f013	1880	case CI_PCOMPRESSION:
donatien	0:632c9925f013	1881	if (olen == CILEN_VOID) {
donatien	0:632c9925f013	1882	p += 2;
donatien	0:632c9925f013	1883	printer(arg, "pcomp");
donatien	0:632c9925f013	1884	}
donatien	0:632c9925f013	1885	break;
donatien	0:632c9925f013	1886	case CI_ACCOMPRESSION:
donatien	0:632c9925f013	1887	if (olen == CILEN_VOID) {
donatien	0:632c9925f013	1888	p += 2;
donatien	0:632c9925f013	1889	printer(arg, "accomp");
donatien	0:632c9925f013	1890	}
donatien	0:632c9925f013	1891	break;
donatien	0:632c9925f013	1892	}
donatien	0:632c9925f013	1893	while (p < optend) {
donatien	0:632c9925f013	1894	GETCHAR(code, p);
donatien	0:632c9925f013	1895	printer(arg, " %.2x", code);
donatien	0:632c9925f013	1896	}
donatien	0:632c9925f013	1897	printer(arg, ">");
donatien	0:632c9925f013	1898	}
donatien	0:632c9925f013	1899	break;
donatien	0:632c9925f013	1900
donatien	0:632c9925f013	1901	case TERMACK:
donatien	0:632c9925f013	1902	case TERMREQ:
donatien	0:632c9925f013	1903	if (len > 0 && p >= ' ' && p < 0x7f) {
donatien	0:632c9925f013	1904	printer(arg, " ");
donatien	0:632c9925f013	1905	print_string((char*)p, len, printer, arg);
donatien	0:632c9925f013	1906	p += len;
donatien	0:632c9925f013	1907	len = 0;
donatien	0:632c9925f013	1908	}
donatien	0:632c9925f013	1909	break;
donatien	0:632c9925f013	1910
donatien	0:632c9925f013	1911	case ECHOREQ:
donatien	0:632c9925f013	1912	case ECHOREP:
donatien	0:632c9925f013	1913	case DISCREQ:
donatien	0:632c9925f013	1914	if (len >= 4) {
donatien	0:632c9925f013	1915	GETLONG(cilong, p);
donatien	0:632c9925f013	1916	printer(arg, " magic=0x%x", cilong);
donatien	0:632c9925f013	1917	p += 4;
donatien	0:632c9925f013	1918	len -= 4;
donatien	0:632c9925f013	1919	}
donatien	0:632c9925f013	1920	break;
donatien	0:632c9925f013	1921	}
donatien	0:632c9925f013	1922
donatien	0:632c9925f013	1923	/* print the rest of the bytes in the packet */
donatien	0:632c9925f013	1924	for (; len > 0; --len) {
donatien	0:632c9925f013	1925	GETCHAR(code, p);
donatien	0:632c9925f013	1926	printer(arg, " %.2x", code);
donatien	0:632c9925f013	1927	}
donatien	0:632c9925f013	1928
donatien	0:632c9925f013	1929	return (int)(p - pstart);
donatien	0:632c9925f013	1930	}
donatien	0:632c9925f013	1931	#endif /* PPP_ADDITIONAL_CALLBACKS */
donatien	0:632c9925f013	1932
donatien	0:632c9925f013	1933	/*
donatien	0:632c9925f013	1934	* Time to shut down the link because there is nothing out there.
donatien	0:632c9925f013	1935	*/
donatien	0:632c9925f013	1936	static void
donatien	0:632c9925f013	1937	LcpLinkFailure (fsm *f)
donatien	0:632c9925f013	1938	{
donatien	0:632c9925f013	1939	if (f->state == LS_OPENED) {
donatien	0:632c9925f013	1940	LCPDEBUG(LOG_INFO, ("No response to %d echo-requests\n", lcp_echos_pending));
donatien	0:632c9925f013	1941	LCPDEBUG(LOG_NOTICE, ("Serial link appears to be disconnected.\n"));
donatien	0:632c9925f013	1942	lcp_close(f->unit, "Peer not responding");
donatien	0:632c9925f013	1943	}
donatien	0:632c9925f013	1944	}
donatien	0:632c9925f013	1945
donatien	0:632c9925f013	1946	/*
donatien	0:632c9925f013	1947	* Timer expired for the LCP echo requests from this process.
donatien	0:632c9925f013	1948	*/
donatien	0:632c9925f013	1949	static void
donatien	0:632c9925f013	1950	LcpEchoCheck (fsm *f)
donatien	0:632c9925f013	1951	{
donatien	0:632c9925f013	1952	LcpSendEchoRequest (f);
donatien	0:632c9925f013	1953
donatien	0:632c9925f013	1954	/*
donatien	0:632c9925f013	1955	* Start the timer for the next interval.
donatien	0:632c9925f013	1956	*/
donatien	0:632c9925f013	1957	LWIP_ASSERT("lcp_echo_timer_running == 0", lcp_echo_timer_running == 0);
donatien	0:632c9925f013	1958
donatien	0:632c9925f013	1959	TIMEOUT (LcpEchoTimeout, f, lcp_echo_interval);
donatien	0:632c9925f013	1960	lcp_echo_timer_running = 1;
donatien	0:632c9925f013	1961	}
donatien	0:632c9925f013	1962
donatien	0:632c9925f013	1963	/*
donatien	0:632c9925f013	1964	* LcpEchoTimeout - Timer expired on the LCP echo
donatien	0:632c9925f013	1965	*/
donatien	0:632c9925f013	1966	static void
donatien	0:632c9925f013	1967	LcpEchoTimeout (void *arg)
donatien	0:632c9925f013	1968	{
donatien	0:632c9925f013	1969	if (lcp_echo_timer_running != 0) {
donatien	0:632c9925f013	1970	lcp_echo_timer_running = 0;
donatien	0:632c9925f013	1971	LcpEchoCheck ((fsm *) arg);
donatien	0:632c9925f013	1972	}
donatien	0:632c9925f013	1973	}
donatien	0:632c9925f013	1974
donatien	0:632c9925f013	1975	/*
donatien	0:632c9925f013	1976	* LcpEchoReply - LCP has received a reply to the echo
donatien	0:632c9925f013	1977	*/
donatien	0:632c9925f013	1978	static void
donatien	0:632c9925f013	1979	lcp_received_echo_reply (fsm f, int id, u_char inp, int len)
donatien	0:632c9925f013	1980	{
donatien	0:632c9925f013	1981	u32_t magic;
donatien	0:632c9925f013	1982
donatien	0:632c9925f013	1983	LWIP_UNUSED_ARG(id);
donatien	0:632c9925f013	1984
donatien	0:632c9925f013	1985	/* Check the magic number - don't count replies from ourselves. */
donatien	0:632c9925f013	1986	if (len < 4) {
donatien	0:632c9925f013	1987	LCPDEBUG(LOG_WARNING, ("lcp: received short Echo-Reply, length %d\n", len));
donatien	0:632c9925f013	1988	return;
donatien	0:632c9925f013	1989	}
donatien	0:632c9925f013	1990	GETLONG(magic, inp);
donatien	0:632c9925f013	1991	if (lcp_gotoptions[f->unit].neg_magicnumber && magic == lcp_gotoptions[f->unit].magicnumber) {
donatien	0:632c9925f013	1992	LCPDEBUG(LOG_WARNING, ("appear to have received our own echo-reply!\n"));
donatien	0:632c9925f013	1993	return;
donatien	0:632c9925f013	1994	}
donatien	0:632c9925f013	1995
donatien	0:632c9925f013	1996	/* Reset the number of outstanding echo frames */
donatien	0:632c9925f013	1997	lcp_echos_pending = 0;
donatien	0:632c9925f013	1998	}
donatien	0:632c9925f013	1999
donatien	0:632c9925f013	2000	/*
donatien	0:632c9925f013	2001	* LcpSendEchoRequest - Send an echo request frame to the peer
donatien	0:632c9925f013	2002	*/
donatien	0:632c9925f013	2003	static void
donatien	0:632c9925f013	2004	LcpSendEchoRequest (fsm *f)
donatien	0:632c9925f013	2005	{
donatien	0:632c9925f013	2006	u32_t lcp_magic;
donatien	0:632c9925f013	2007	u_char pkt[4], *pktp;
donatien	0:632c9925f013	2008
donatien	0:632c9925f013	2009	/*
donatien	0:632c9925f013	2010	* Detect the failure of the peer at this point.
donatien	0:632c9925f013	2011	*/
donatien	0:632c9925f013	2012	if (lcp_echo_fails != 0) {
donatien	0:632c9925f013	2013	if (lcp_echos_pending++ >= lcp_echo_fails) {
donatien	0:632c9925f013	2014	LcpLinkFailure(f);
donatien	0:632c9925f013	2015	lcp_echos_pending = 0;
donatien	0:632c9925f013	2016	}
donatien	0:632c9925f013	2017	}
donatien	0:632c9925f013	2018
donatien	0:632c9925f013	2019	/*
donatien	0:632c9925f013	2020	* Make and send the echo request frame.
donatien	0:632c9925f013	2021	*/
donatien	0:632c9925f013	2022	if (f->state == LS_OPENED) {
donatien	0:632c9925f013	2023	lcp_magic = lcp_gotoptions[f->unit].magicnumber;
donatien	0:632c9925f013	2024	pktp = pkt;
donatien	0:632c9925f013	2025	PUTLONG(lcp_magic, pktp);
donatien	0:632c9925f013	2026	fsm_sdata(f, ECHOREQ, (u_char)(lcp_echo_number++ & 0xFF), pkt, (int)(pktp - pkt));
donatien	0:632c9925f013	2027	}
donatien	0:632c9925f013	2028	}
donatien	0:632c9925f013	2029
donatien	0:632c9925f013	2030	/*
donatien	0:632c9925f013	2031	* lcp_echo_lowerup - Start the timer for the LCP frame
donatien	0:632c9925f013	2032	*/
donatien	0:632c9925f013	2033
donatien	0:632c9925f013	2034	static void
donatien	0:632c9925f013	2035	lcp_echo_lowerup (int unit)
donatien	0:632c9925f013	2036	{
donatien	0:632c9925f013	2037	fsm *f = &lcp_fsm[unit];
donatien	0:632c9925f013	2038
donatien	0:632c9925f013	2039	/* Clear the parameters for generating echo frames */
donatien	0:632c9925f013	2040	lcp_echos_pending = 0;
donatien	0:632c9925f013	2041	lcp_echo_number = 0;
donatien	0:632c9925f013	2042	lcp_echo_timer_running = 0;
donatien	0:632c9925f013	2043
donatien	0:632c9925f013	2044	/* If a timeout interval is specified then start the timer */
donatien	0:632c9925f013	2045	if (lcp_echo_interval != 0) {
donatien	0:632c9925f013	2046	LcpEchoCheck (f);
donatien	0:632c9925f013	2047	}
donatien	0:632c9925f013	2048	}
donatien	0:632c9925f013	2049
donatien	0:632c9925f013	2050	/*
donatien	0:632c9925f013	2051	* lcp_echo_lowerdown - Stop the timer for the LCP frame
donatien	0:632c9925f013	2052	*/
donatien	0:632c9925f013	2053
donatien	0:632c9925f013	2054	static void
donatien	0:632c9925f013	2055	lcp_echo_lowerdown (int unit)
donatien	0:632c9925f013	2056	{
donatien	0:632c9925f013	2057	fsm *f = &lcp_fsm[unit];
donatien	0:632c9925f013	2058
donatien	0:632c9925f013	2059	if (lcp_echo_timer_running != 0) {
donatien	0:632c9925f013	2060	UNTIMEOUT (LcpEchoTimeout, f);
donatien	0:632c9925f013	2061	lcp_echo_timer_running = 0;
donatien	0:632c9925f013	2062	}
donatien	0:632c9925f013	2063	}
donatien	0:632c9925f013	2064
donatien	0:632c9925f013	2065	#endif /* PPP_SUPPORT */

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Type:	Program
Created:	11 Jun 2010
Imports:	2654
Forks:	0
Commits:	12
Dependents:	3
Dependencies:	0
Followers:	13

This repository is Public (Unlisted).

lwip/netif/ppp/lcp.c@0:632c9925f013, 2010-06-11 (annotated)

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