AmpereMeter - Example self-announcing webserver which controls …

Users » dirkx » Code » AmpereMeter

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

Example self-announcing webserver which controls a servo through a smallHTML userinterface.

lwip/netif/ppp/lcp.c@0:a259777c45a3, 2010-08-14 (annotated)

Committer:: dirkx
Date:: Sat Aug 14 15:56:01 2010 +0000
Revision:: 0:a259777c45a3

Who changed what in which revision?

User	Revision	Line number	New contents of line
dirkx	0:a259777c45a3	1	/*****************************************************************************
dirkx	0:a259777c45a3	2	* lcp.c - Network Link Control Protocol program file.
dirkx	0:a259777c45a3	3	*
dirkx	0:a259777c45a3	4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
dirkx	0:a259777c45a3	5	* portions Copyright (c) 1997 by Global Election Systems Inc.
dirkx	0:a259777c45a3	6	*
dirkx	0:a259777c45a3	7	* The authors hereby grant permission to use, copy, modify, distribute,
dirkx	0:a259777c45a3	8	* and license this software and its documentation for any purpose, provided
dirkx	0:a259777c45a3	9	* that existing copyright notices are retained in all copies and that this
dirkx	0:a259777c45a3	10	* notice and the following disclaimer are included verbatim in any
dirkx	0:a259777c45a3	11	* distributions. No written agreement, license, or royalty fee is required
dirkx	0:a259777c45a3	12	* for any of the authorized uses.
dirkx	0:a259777c45a3	13	*
dirkx	0:a259777c45a3	14	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
dirkx	0:a259777c45a3	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
dirkx	0:a259777c45a3	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
dirkx	0:a259777c45a3	17	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
dirkx	0:a259777c45a3	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
dirkx	0:a259777c45a3	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
dirkx	0:a259777c45a3	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
dirkx	0:a259777c45a3	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
dirkx	0:a259777c45a3	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
dirkx	0:a259777c45a3	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
dirkx	0:a259777c45a3	24	*
dirkx	0:a259777c45a3	25	******************************************************************************
dirkx	0:a259777c45a3	26	* REVISION HISTORY
dirkx	0:a259777c45a3	27	*
dirkx	0:a259777c45a3	28	* 03-01-01 Marc Boucher <marc@mbsi.ca>
dirkx	0:a259777c45a3	29	* Ported to lwIP.
dirkx	0:a259777c45a3	30	* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
dirkx	0:a259777c45a3	31	* Original.
dirkx	0:a259777c45a3	32	*****************************************************************************/
dirkx	0:a259777c45a3	33
dirkx	0:a259777c45a3	34	/*
dirkx	0:a259777c45a3	35	* lcp.c - PPP Link Control Protocol.
dirkx	0:a259777c45a3	36	*
dirkx	0:a259777c45a3	37	* Copyright (c) 1989 Carnegie Mellon University.
dirkx	0:a259777c45a3	38	* All rights reserved.
dirkx	0:a259777c45a3	39	*
dirkx	0:a259777c45a3	40	* Redistribution and use in source and binary forms are permitted
dirkx	0:a259777c45a3	41	* provided that the above copyright notice and this paragraph are
dirkx	0:a259777c45a3	42	* duplicated in all such forms and that any documentation,
dirkx	0:a259777c45a3	43	* advertising materials, and other materials related to such
dirkx	0:a259777c45a3	44	* distribution and use acknowledge that the software was developed
dirkx	0:a259777c45a3	45	* by Carnegie Mellon University. The name of the
dirkx	0:a259777c45a3	46	* University may not be used to endorse or promote products derived
dirkx	0:a259777c45a3	47	* from this software without specific prior written permission.
dirkx	0:a259777c45a3	48	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
dirkx	0:a259777c45a3	49	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
dirkx	0:a259777c45a3	50	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
dirkx	0:a259777c45a3	51	*/
dirkx	0:a259777c45a3	52
dirkx	0:a259777c45a3	53
dirkx	0:a259777c45a3	54	#include "lwip/opt.h"
dirkx	0:a259777c45a3	55
dirkx	0:a259777c45a3	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
dirkx	0:a259777c45a3	57
dirkx	0:a259777c45a3	58	#include "ppp.h"
dirkx	0:a259777c45a3	59	#include "pppdebug.h"
dirkx	0:a259777c45a3	60
dirkx	0:a259777c45a3	61	#include "fsm.h"
dirkx	0:a259777c45a3	62	#include "chap.h"
dirkx	0:a259777c45a3	63	#include "magic.h"
dirkx	0:a259777c45a3	64	#include "auth.h"
dirkx	0:a259777c45a3	65	#include "lcp.h"
dirkx	0:a259777c45a3	66
dirkx	0:a259777c45a3	67	#include <string.h>
dirkx	0:a259777c45a3	68
dirkx	0:a259777c45a3	69	#if PPPOE_SUPPORT
dirkx	0:a259777c45a3	70	#include "netif/ppp_oe.h"
dirkx	0:a259777c45a3	71	#else
dirkx	0:a259777c45a3	72	#define PPPOE_MAXMTU PPP_MAXMRU
dirkx	0:a259777c45a3	73	#endif
dirkx	0:a259777c45a3	74
dirkx	0:a259777c45a3	75	#if 0 /* UNUSED */
dirkx	0:a259777c45a3	76	/*
dirkx	0:a259777c45a3	77	* LCP-related command-line options.
dirkx	0:a259777c45a3	78	*/
dirkx	0:a259777c45a3	79	int lcp_echo_interval = 0; /* Interval between LCP echo-requests */
dirkx	0:a259777c45a3	80	int lcp_echo_fails = 0; /* Tolerance to unanswered echo-requests */
dirkx	0:a259777c45a3	81	bool lax_recv = 0; /* accept control chars in asyncmap */
dirkx	0:a259777c45a3	82
dirkx	0:a259777c45a3	83	static int setescape (char **);
dirkx	0:a259777c45a3	84
dirkx	0:a259777c45a3	85	static option_t lcp_option_list[] = {
dirkx	0:a259777c45a3	86	/* LCP options */
dirkx	0:a259777c45a3	87	/* list stripped for simplicity */
dirkx	0:a259777c45a3	88	{NULL}
dirkx	0:a259777c45a3	89	};
dirkx	0:a259777c45a3	90	#endif /* UNUSED */
dirkx	0:a259777c45a3	91
dirkx	0:a259777c45a3	92	/* options */
dirkx	0:a259777c45a3	93	LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */
dirkx	0:a259777c45a3	94	static u_int lcp_echo_interval = LCP_ECHOINTERVAL; /* Interval between LCP echo-requests */
dirkx	0:a259777c45a3	95	static u_int lcp_echo_fails = LCP_MAXECHOFAILS; /* Tolerance to unanswered echo-requests */
dirkx	0:a259777c45a3	96
dirkx	0:a259777c45a3	97	/* global vars */
dirkx	0:a259777c45a3	98	static fsm lcp_fsm[NUM_PPP]; /* LCP fsm structure (global)*/
dirkx	0:a259777c45a3	99	lcp_options lcp_wantoptions[NUM_PPP]; /* Options that we want to request */
dirkx	0:a259777c45a3	100	lcp_options lcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
dirkx	0:a259777c45a3	101	lcp_options lcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
dirkx	0:a259777c45a3	102	lcp_options lcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
dirkx	0:a259777c45a3	103	ext_accm xmit_accm[NUM_PPP]; /* extended transmit ACCM */
dirkx	0:a259777c45a3	104
dirkx	0:a259777c45a3	105	static u32_t lcp_echos_pending = 0; /* Number of outstanding echo msgs */
dirkx	0:a259777c45a3	106	static u32_t lcp_echo_number = 0; /* ID number of next echo frame */
dirkx	0:a259777c45a3	107	static u32_t lcp_echo_timer_running = 0; /* TRUE if a timer is running */
dirkx	0:a259777c45a3	108
dirkx	0:a259777c45a3	109	/* @todo: do we really need such a large buffer? The typical 1500 bytes seem too much. */
dirkx	0:a259777c45a3	110	static u_char nak_buffer[PPP_MRU] MEM_POSITION; /* where we construct a nak packet */
dirkx	0:a259777c45a3	111
dirkx	0:a259777c45a3	112	/*
dirkx	0:a259777c45a3	113	* Callbacks for fsm code. (CI = Configuration Information)
dirkx	0:a259777c45a3	114	*/
dirkx	0:a259777c45a3	115	static void lcp_resetci (fsm); / Reset our CI */
dirkx	0:a259777c45a3	116	static int lcp_cilen (fsm); / Return length of our CI */
dirkx	0:a259777c45a3	117	static void lcp_addci (fsm, u_char, int); / Add our CI to pkt */
dirkx	0:a259777c45a3	118	static int lcp_ackci (fsm, u_char, int); /* Peer ack'd our CI */
dirkx	0:a259777c45a3	119	static int lcp_nakci (fsm, u_char, int); /* Peer nak'd our CI */
dirkx	0:a259777c45a3	120	static int lcp_rejci (fsm, u_char, int); /* Peer rej'd our CI */
dirkx	0:a259777c45a3	121	static int lcp_reqci (fsm, u_char, int, int); / Rcv peer CI */
dirkx	0:a259777c45a3	122	static void lcp_up (fsm); / We're UP */
dirkx	0:a259777c45a3	123	static void lcp_down (fsm); / We're DOWN */
dirkx	0:a259777c45a3	124	static void lcp_starting (fsm); / We need lower layer up */
dirkx	0:a259777c45a3	125	static void lcp_finished (fsm); / We need lower layer down */
dirkx	0:a259777c45a3	126	static int lcp_extcode (fsm, int, u_char, u_char, int);
dirkx	0:a259777c45a3	127	static void lcp_rprotrej (fsm, u_char, int);
dirkx	0:a259777c45a3	128
dirkx	0:a259777c45a3	129	/*
dirkx	0:a259777c45a3	130	* routines to send LCP echos to peer
dirkx	0:a259777c45a3	131	*/
dirkx	0:a259777c45a3	132
dirkx	0:a259777c45a3	133	static void lcp_echo_lowerup (int);
dirkx	0:a259777c45a3	134	static void lcp_echo_lowerdown (int);
dirkx	0:a259777c45a3	135	static void LcpEchoTimeout (void*);
dirkx	0:a259777c45a3	136	static void lcp_received_echo_reply (fsm, int, u_char, int);
dirkx	0:a259777c45a3	137	static void LcpSendEchoRequest (fsm*);
dirkx	0:a259777c45a3	138	static void LcpLinkFailure (fsm*);
dirkx	0:a259777c45a3	139	static void LcpEchoCheck (fsm*);
dirkx	0:a259777c45a3	140
dirkx	0:a259777c45a3	141	static fsm_callbacks lcp_callbacks = { /* LCP callback routines */
dirkx	0:a259777c45a3	142	lcp_resetci, /* Reset our Configuration Information */
dirkx	0:a259777c45a3	143	lcp_cilen, /* Length of our Configuration Information */
dirkx	0:a259777c45a3	144	lcp_addci, /* Add our Configuration Information */
dirkx	0:a259777c45a3	145	lcp_ackci, /* ACK our Configuration Information */
dirkx	0:a259777c45a3	146	lcp_nakci, /* NAK our Configuration Information */
dirkx	0:a259777c45a3	147	lcp_rejci, /* Reject our Configuration Information */
dirkx	0:a259777c45a3	148	lcp_reqci, /* Request peer's Configuration Information */
dirkx	0:a259777c45a3	149	lcp_up, /* Called when fsm reaches LS_OPENED state */
dirkx	0:a259777c45a3	150	lcp_down, /* Called when fsm leaves LS_OPENED state */
dirkx	0:a259777c45a3	151	lcp_starting, /* Called when we want the lower layer up */
dirkx	0:a259777c45a3	152	lcp_finished, /* Called when we want the lower layer down */
dirkx	0:a259777c45a3	153	NULL, /* Called when Protocol-Reject received */
dirkx	0:a259777c45a3	154	NULL, /* Retransmission is necessary */
dirkx	0:a259777c45a3	155	lcp_extcode, /* Called to handle LCP-specific codes */
dirkx	0:a259777c45a3	156	"LCP" /* String name of protocol */
dirkx	0:a259777c45a3	157	};
dirkx	0:a259777c45a3	158
dirkx	0:a259777c45a3	159	/*
dirkx	0:a259777c45a3	160	* Protocol entry points.
dirkx	0:a259777c45a3	161	* Some of these are called directly.
dirkx	0:a259777c45a3	162	*/
dirkx	0:a259777c45a3	163
dirkx	0:a259777c45a3	164	static void lcp_input (int, u_char *, int);
dirkx	0:a259777c45a3	165	static void lcp_protrej (int);
dirkx	0:a259777c45a3	166
dirkx	0:a259777c45a3	167	struct protent lcp_protent = {
dirkx	0:a259777c45a3	168	PPP_LCP,
dirkx	0:a259777c45a3	169	lcp_init,
dirkx	0:a259777c45a3	170	lcp_input,
dirkx	0:a259777c45a3	171	lcp_protrej,
dirkx	0:a259777c45a3	172	lcp_lowerup,
dirkx	0:a259777c45a3	173	lcp_lowerdown,
dirkx	0:a259777c45a3	174	lcp_open,
dirkx	0:a259777c45a3	175	lcp_close,
dirkx	0:a259777c45a3	176	#if PPP_ADDITIONAL_CALLBACKS
dirkx	0:a259777c45a3	177	lcp_printpkt,
dirkx	0:a259777c45a3	178	NULL,
dirkx	0:a259777c45a3	179	#endif /* PPP_ADDITIONAL_CALLBACKS */
dirkx	0:a259777c45a3	180	1,
dirkx	0:a259777c45a3	181	"LCP",
dirkx	0:a259777c45a3	182	#if PPP_ADDITIONAL_CALLBACKS
dirkx	0:a259777c45a3	183	NULL,
dirkx	0:a259777c45a3	184	NULL,
dirkx	0:a259777c45a3	185	NULL
dirkx	0:a259777c45a3	186	#endif /* PPP_ADDITIONAL_CALLBACKS */
dirkx	0:a259777c45a3	187	};
dirkx	0:a259777c45a3	188
dirkx	0:a259777c45a3	189	int lcp_loopbackfail = DEFLOOPBACKFAIL;
dirkx	0:a259777c45a3	190
dirkx	0:a259777c45a3	191	/*
dirkx	0:a259777c45a3	192	* Length of each type of configuration option (in octets)
dirkx	0:a259777c45a3	193	*/
dirkx	0:a259777c45a3	194	#define CILEN_VOID 2
dirkx	0:a259777c45a3	195	#define CILEN_CHAR 3
dirkx	0:a259777c45a3	196	#define CILEN_SHORT 4 /* CILEN_VOID + sizeof(short) */
dirkx	0:a259777c45a3	197	#define CILEN_CHAP 5 /* CILEN_VOID + sizeof(short) + 1 */
dirkx	0:a259777c45a3	198	#define CILEN_LONG 6 /* CILEN_VOID + sizeof(long) */
dirkx	0:a259777c45a3	199	#define CILEN_LQR 8 /* CILEN_VOID + sizeof(short) + sizeof(long) */
dirkx	0:a259777c45a3	200	#define CILEN_CBCP 3
dirkx	0:a259777c45a3	201
dirkx	0:a259777c45a3	202	#define CODENAME(x) ((x) == CONFACK ? "ACK" : (x) == CONFNAK ? "NAK" : "REJ")
dirkx	0:a259777c45a3	203
dirkx	0:a259777c45a3	204	#if 0 /* UNUSED */
dirkx	0:a259777c45a3	205	/*
dirkx	0:a259777c45a3	206	* setescape - add chars to the set we escape on transmission.
dirkx	0:a259777c45a3	207	*/
dirkx	0:a259777c45a3	208	static int
dirkx	0:a259777c45a3	209	setescape(argv)
dirkx	0:a259777c45a3	210	char **argv;
dirkx	0:a259777c45a3	211	{
dirkx	0:a259777c45a3	212	int n, ret;
dirkx	0:a259777c45a3	213	char p, endp;
dirkx	0:a259777c45a3	214
dirkx	0:a259777c45a3	215	p = *argv;
dirkx	0:a259777c45a3	216	ret = 1;
dirkx	0:a259777c45a3	217	while (*p) {
dirkx	0:a259777c45a3	218	n = strtol(p, &endp, 16);
dirkx	0:a259777c45a3	219	if (p == endp) {
dirkx	0:a259777c45a3	220	option_error("escape parameter contains invalid hex number '%s'", p);
dirkx	0:a259777c45a3	221	return 0;
dirkx	0:a259777c45a3	222	}
dirkx	0:a259777c45a3	223	p = endp;
dirkx	0:a259777c45a3	224	if (n < 0 \|\| n == 0x5E \|\| n > 0xFF) {
dirkx	0:a259777c45a3	225	option_error("can't escape character 0x%x", n);
dirkx	0:a259777c45a3	226	ret = 0;
dirkx	0:a259777c45a3	227	} else
dirkx	0:a259777c45a3	228	xmit_accm[0][n >> 5] \|= 1 << (n & 0x1F);
dirkx	0:a259777c45a3	229	while (p == ',' \|\| p == ' ')
dirkx	0:a259777c45a3	230	++p;
dirkx	0:a259777c45a3	231	}
dirkx	0:a259777c45a3	232	return ret;
dirkx	0:a259777c45a3	233	}
dirkx	0:a259777c45a3	234	#endif /* UNUSED */
dirkx	0:a259777c45a3	235
dirkx	0:a259777c45a3	236	/*
dirkx	0:a259777c45a3	237	* lcp_init - Initialize LCP.
dirkx	0:a259777c45a3	238	*/
dirkx	0:a259777c45a3	239	void
dirkx	0:a259777c45a3	240	lcp_init(int unit)
dirkx	0:a259777c45a3	241	{
dirkx	0:a259777c45a3	242	fsm *f = &lcp_fsm[unit];
dirkx	0:a259777c45a3	243	lcp_options *wo = &lcp_wantoptions[unit];
dirkx	0:a259777c45a3	244	lcp_options *ao = &lcp_allowoptions[unit];
dirkx	0:a259777c45a3	245
dirkx	0:a259777c45a3	246	f->unit = unit;
dirkx	0:a259777c45a3	247	f->protocol = PPP_LCP;
dirkx	0:a259777c45a3	248	f->callbacks = &lcp_callbacks;
dirkx	0:a259777c45a3	249
dirkx	0:a259777c45a3	250	fsm_init(f);
dirkx	0:a259777c45a3	251
dirkx	0:a259777c45a3	252	wo->passive = 0;
dirkx	0:a259777c45a3	253	wo->silent = 0;
dirkx	0:a259777c45a3	254	wo->restart = 0; /* Set to 1 in kernels or multi-line implementations */
dirkx	0:a259777c45a3	255	wo->neg_mru = 1;
dirkx	0:a259777c45a3	256	wo->mru = PPP_DEFMRU;
dirkx	0:a259777c45a3	257	wo->neg_asyncmap = 1;
dirkx	0:a259777c45a3	258	wo->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
dirkx	0:a259777c45a3	259	wo->neg_chap = 0; /* Set to 1 on server */
dirkx	0:a259777c45a3	260	wo->neg_upap = 0; /* Set to 1 on server */
dirkx	0:a259777c45a3	261	wo->chap_mdtype = CHAP_DIGEST_MD5;
dirkx	0:a259777c45a3	262	wo->neg_magicnumber = 1;
dirkx	0:a259777c45a3	263	wo->neg_pcompression = 1;
dirkx	0:a259777c45a3	264	wo->neg_accompression = 1;
dirkx	0:a259777c45a3	265	wo->neg_lqr = 0; /* no LQR implementation yet */
dirkx	0:a259777c45a3	266	wo->neg_cbcp = 0;
dirkx	0:a259777c45a3	267
dirkx	0:a259777c45a3	268	ao->neg_mru = 1;
dirkx	0:a259777c45a3	269	ao->mru = PPP_MAXMRU;
dirkx	0:a259777c45a3	270	ao->neg_asyncmap = 1;
dirkx	0:a259777c45a3	271	ao->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
dirkx	0:a259777c45a3	272	ao->neg_chap = (CHAP_SUPPORT != 0);
dirkx	0:a259777c45a3	273	ao->chap_mdtype = CHAP_DIGEST_MD5;
dirkx	0:a259777c45a3	274	ao->neg_upap = (PAP_SUPPORT != 0);
dirkx	0:a259777c45a3	275	ao->neg_magicnumber = 1;
dirkx	0:a259777c45a3	276	ao->neg_pcompression = 1;
dirkx	0:a259777c45a3	277	ao->neg_accompression = 1;
dirkx	0:a259777c45a3	278	ao->neg_lqr = 0; /* no LQR implementation yet */
dirkx	0:a259777c45a3	279	ao->neg_cbcp = (CBCP_SUPPORT != 0);
dirkx	0:a259777c45a3	280
dirkx	0:a259777c45a3	281	/*
dirkx	0:a259777c45a3	282	* Set transmit escape for the flag and escape characters plus anything
dirkx	0:a259777c45a3	283	* set for the allowable options.
dirkx	0:a259777c45a3	284	*/
dirkx	0:a259777c45a3	285	memset(xmit_accm[unit], 0, sizeof(xmit_accm[0]));
dirkx	0:a259777c45a3	286	xmit_accm[unit][15] = 0x60;
dirkx	0:a259777c45a3	287	xmit_accm[unit][0] = (u_char)((ao->asyncmap & 0xFF));
dirkx	0:a259777c45a3	288	xmit_accm[unit][1] = (u_char)((ao->asyncmap >> 8) & 0xFF);
dirkx	0:a259777c45a3	289	xmit_accm[unit][2] = (u_char)((ao->asyncmap >> 16) & 0xFF);
dirkx	0:a259777c45a3	290	xmit_accm[unit][3] = (u_char)((ao->asyncmap >> 24) & 0xFF);
dirkx	0:a259777c45a3	291	LCPDEBUG(LOG_INFO, ("lcp_init: xmit_accm=%X %X %X %X\n",
dirkx	0:a259777c45a3	292	xmit_accm[unit][0],
dirkx	0:a259777c45a3	293	xmit_accm[unit][1],
dirkx	0:a259777c45a3	294	xmit_accm[unit][2],
dirkx	0:a259777c45a3	295	xmit_accm[unit][3]));
dirkx	0:a259777c45a3	296
dirkx	0:a259777c45a3	297	lcp_phase[unit] = PHASE_INITIALIZE;
dirkx	0:a259777c45a3	298	}
dirkx	0:a259777c45a3	299
dirkx	0:a259777c45a3	300
dirkx	0:a259777c45a3	301	/*
dirkx	0:a259777c45a3	302	* lcp_open - LCP is allowed to come up.
dirkx	0:a259777c45a3	303	*/
dirkx	0:a259777c45a3	304	void
dirkx	0:a259777c45a3	305	lcp_open(int unit)
dirkx	0:a259777c45a3	306	{
dirkx	0:a259777c45a3	307	fsm *f = &lcp_fsm[unit];
dirkx	0:a259777c45a3	308	lcp_options *wo = &lcp_wantoptions[unit];
dirkx	0:a259777c45a3	309
dirkx	0:a259777c45a3	310	f->flags = 0;
dirkx	0:a259777c45a3	311	if (wo->passive) {
dirkx	0:a259777c45a3	312	f->flags \|= OPT_PASSIVE;
dirkx	0:a259777c45a3	313	}
dirkx	0:a259777c45a3	314	if (wo->silent) {
dirkx	0:a259777c45a3	315	f->flags \|= OPT_SILENT;
dirkx	0:a259777c45a3	316	}
dirkx	0:a259777c45a3	317	fsm_open(f);
dirkx	0:a259777c45a3	318
dirkx	0:a259777c45a3	319	lcp_phase[unit] = PHASE_ESTABLISH;
dirkx	0:a259777c45a3	320	}
dirkx	0:a259777c45a3	321
dirkx	0:a259777c45a3	322
dirkx	0:a259777c45a3	323	/*
dirkx	0:a259777c45a3	324	* lcp_close - Take LCP down.
dirkx	0:a259777c45a3	325	*/
dirkx	0:a259777c45a3	326	void
dirkx	0:a259777c45a3	327	lcp_close(int unit, char *reason)
dirkx	0:a259777c45a3	328	{
dirkx	0:a259777c45a3	329	fsm *f = &lcp_fsm[unit];
dirkx	0:a259777c45a3	330
dirkx	0:a259777c45a3	331	if (lcp_phase[unit] != PHASE_DEAD) {
dirkx	0:a259777c45a3	332	lcp_phase[unit] = PHASE_TERMINATE;
dirkx	0:a259777c45a3	333	}
dirkx	0:a259777c45a3	334	if (f->state == LS_STOPPED && f->flags & (OPT_PASSIVE\|OPT_SILENT)) {
dirkx	0:a259777c45a3	335	/*
dirkx	0:a259777c45a3	336	* This action is not strictly according to the FSM in RFC1548,
dirkx	0:a259777c45a3	337	* but it does mean that the program terminates if you do an
dirkx	0:a259777c45a3	338	* lcp_close() in passive/silent mode when a connection hasn't
dirkx	0:a259777c45a3	339	* been established.
dirkx	0:a259777c45a3	340	*/
dirkx	0:a259777c45a3	341	f->state = LS_CLOSED;
dirkx	0:a259777c45a3	342	lcp_finished(f);
dirkx	0:a259777c45a3	343	} else {
dirkx	0:a259777c45a3	344	fsm_close(f, reason);
dirkx	0:a259777c45a3	345	}
dirkx	0:a259777c45a3	346	}
dirkx	0:a259777c45a3	347
dirkx	0:a259777c45a3	348
dirkx	0:a259777c45a3	349	/*
dirkx	0:a259777c45a3	350	* lcp_lowerup - The lower layer is up.
dirkx	0:a259777c45a3	351	*/
dirkx	0:a259777c45a3	352	void
dirkx	0:a259777c45a3	353	lcp_lowerup(int unit)
dirkx	0:a259777c45a3	354	{
dirkx	0:a259777c45a3	355	lcp_options *wo = &lcp_wantoptions[unit];
dirkx	0:a259777c45a3	356
dirkx	0:a259777c45a3	357	/*
dirkx	0:a259777c45a3	358	* Don't use A/C or protocol compression on transmission,
dirkx	0:a259777c45a3	359	* but accept A/C and protocol compressed packets
dirkx	0:a259777c45a3	360	* if we are going to ask for A/C and protocol compression.
dirkx	0:a259777c45a3	361	*/
dirkx	0:a259777c45a3	362	ppp_set_xaccm(unit, &xmit_accm[unit]);
dirkx	0:a259777c45a3	363	ppp_send_config(unit, PPP_MRU, 0xffffffffl, 0, 0);
dirkx	0:a259777c45a3	364	ppp_recv_config(unit, PPP_MRU, 0x00000000l,
dirkx	0:a259777c45a3	365	wo->neg_pcompression, wo->neg_accompression);
dirkx	0:a259777c45a3	366	peer_mru[unit] = PPP_MRU;
dirkx	0:a259777c45a3	367	lcp_allowoptions[unit].asyncmap = (u_long)xmit_accm[unit][0]
dirkx	0:a259777c45a3	368	\| ((u_long)xmit_accm[unit][1] << 8)
dirkx	0:a259777c45a3	369	\| ((u_long)xmit_accm[unit][2] << 16)
dirkx	0:a259777c45a3	370	\| ((u_long)xmit_accm[unit][3] << 24);
dirkx	0:a259777c45a3	371	LCPDEBUG(LOG_INFO, ("lcp_lowerup: asyncmap=%X %X %X %X\n",
dirkx	0:a259777c45a3	372	xmit_accm[unit][3],
dirkx	0:a259777c45a3	373	xmit_accm[unit][2],
dirkx	0:a259777c45a3	374	xmit_accm[unit][1],
dirkx	0:a259777c45a3	375	xmit_accm[unit][0]));
dirkx	0:a259777c45a3	376
dirkx	0:a259777c45a3	377	fsm_lowerup(&lcp_fsm[unit]);
dirkx	0:a259777c45a3	378	}
dirkx	0:a259777c45a3	379
dirkx	0:a259777c45a3	380
dirkx	0:a259777c45a3	381	/*
dirkx	0:a259777c45a3	382	* lcp_lowerdown - The lower layer is down.
dirkx	0:a259777c45a3	383	*/
dirkx	0:a259777c45a3	384	void
dirkx	0:a259777c45a3	385	lcp_lowerdown(int unit)
dirkx	0:a259777c45a3	386	{
dirkx	0:a259777c45a3	387	fsm_lowerdown(&lcp_fsm[unit]);
dirkx	0:a259777c45a3	388	}
dirkx	0:a259777c45a3	389
dirkx	0:a259777c45a3	390
dirkx	0:a259777c45a3	391	/*
dirkx	0:a259777c45a3	392	* lcp_input - Input LCP packet.
dirkx	0:a259777c45a3	393	*/
dirkx	0:a259777c45a3	394	static void
dirkx	0:a259777c45a3	395	lcp_input(int unit, u_char *p, int len)
dirkx	0:a259777c45a3	396	{
dirkx	0:a259777c45a3	397	fsm *f = &lcp_fsm[unit];
dirkx	0:a259777c45a3	398
dirkx	0:a259777c45a3	399	fsm_input(f, p, len);
dirkx	0:a259777c45a3	400	}
dirkx	0:a259777c45a3	401
dirkx	0:a259777c45a3	402
dirkx	0:a259777c45a3	403	/*
dirkx	0:a259777c45a3	404	* lcp_extcode - Handle a LCP-specific code.
dirkx	0:a259777c45a3	405	*/
dirkx	0:a259777c45a3	406	static int
dirkx	0:a259777c45a3	407	lcp_extcode(fsm f, int code, u_char id, u_char inp, int len)
dirkx	0:a259777c45a3	408	{
dirkx	0:a259777c45a3	409	u_char *magp;
dirkx	0:a259777c45a3	410
dirkx	0:a259777c45a3	411	switch( code ){
dirkx	0:a259777c45a3	412	case PROTREJ:
dirkx	0:a259777c45a3	413	lcp_rprotrej(f, inp, len);
dirkx	0:a259777c45a3	414	break;
dirkx	0:a259777c45a3	415
dirkx	0:a259777c45a3	416	case ECHOREQ:
dirkx	0:a259777c45a3	417	if (f->state != LS_OPENED) {
dirkx	0:a259777c45a3	418	break;
dirkx	0:a259777c45a3	419	}
dirkx	0:a259777c45a3	420	LCPDEBUG(LOG_INFO, ("lcp: Echo-Request, Rcvd id %d\n", id));
dirkx	0:a259777c45a3	421	magp = inp;
dirkx	0:a259777c45a3	422	PUTLONG(lcp_gotoptions[f->unit].magicnumber, magp);
dirkx	0:a259777c45a3	423	fsm_sdata(f, ECHOREP, id, inp, len);
dirkx	0:a259777c45a3	424	break;
dirkx	0:a259777c45a3	425
dirkx	0:a259777c45a3	426	case ECHOREP:
dirkx	0:a259777c45a3	427	lcp_received_echo_reply(f, id, inp, len);
dirkx	0:a259777c45a3	428	break;
dirkx	0:a259777c45a3	429
dirkx	0:a259777c45a3	430	case DISCREQ:
dirkx	0:a259777c45a3	431	break;
dirkx	0:a259777c45a3	432
dirkx	0:a259777c45a3	433	default:
dirkx	0:a259777c45a3	434	return 0;
dirkx	0:a259777c45a3	435	}
dirkx	0:a259777c45a3	436	return 1;
dirkx	0:a259777c45a3	437	}
dirkx	0:a259777c45a3	438
dirkx	0:a259777c45a3	439
dirkx	0:a259777c45a3	440	/*
dirkx	0:a259777c45a3	441	* lcp_rprotrej - Receive an Protocol-Reject.
dirkx	0:a259777c45a3	442	*
dirkx	0:a259777c45a3	443	* Figure out which protocol is rejected and inform it.
dirkx	0:a259777c45a3	444	*/
dirkx	0:a259777c45a3	445	static void
dirkx	0:a259777c45a3	446	lcp_rprotrej(fsm f, u_char inp, int len)
dirkx	0:a259777c45a3	447	{
dirkx	0:a259777c45a3	448	int i;
dirkx	0:a259777c45a3	449	struct protent *protp;
dirkx	0:a259777c45a3	450	u_short prot;
dirkx	0:a259777c45a3	451
dirkx	0:a259777c45a3	452	if (len < (int)sizeof (u_short)) {
dirkx	0:a259777c45a3	453	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd short Protocol-Reject packet!\n"));
dirkx	0:a259777c45a3	454	return;
dirkx	0:a259777c45a3	455	}
dirkx	0:a259777c45a3	456
dirkx	0:a259777c45a3	457	GETSHORT(prot, inp);
dirkx	0:a259777c45a3	458
dirkx	0:a259777c45a3	459	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd Protocol-Reject packet for %x!\n", prot));
dirkx	0:a259777c45a3	460
dirkx	0:a259777c45a3	461	/*
dirkx	0:a259777c45a3	462	* Protocol-Reject packets received in any state other than the LCP
dirkx	0:a259777c45a3	463	* LS_OPENED state SHOULD be silently discarded.
dirkx	0:a259777c45a3	464	*/
dirkx	0:a259777c45a3	465	if( f->state != LS_OPENED ) {
dirkx	0:a259777c45a3	466	LCPDEBUG(LOG_INFO, ("Protocol-Reject discarded: LCP in state %d\n", f->state));
dirkx	0:a259777c45a3	467	return;
dirkx	0:a259777c45a3	468	}
dirkx	0:a259777c45a3	469
dirkx	0:a259777c45a3	470	/*
dirkx	0:a259777c45a3	471	* Upcall the proper Protocol-Reject routine.
dirkx	0:a259777c45a3	472	*/
dirkx	0:a259777c45a3	473	for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
dirkx	0:a259777c45a3	474	if (protp->protocol == prot && protp->enabled_flag) {
dirkx	0:a259777c45a3	475	(*protp->protrej)(f->unit);
dirkx	0:a259777c45a3	476	return;
dirkx	0:a259777c45a3	477	}
dirkx	0:a259777c45a3	478	}
dirkx	0:a259777c45a3	479
dirkx	0:a259777c45a3	480	LCPDEBUG(LOG_WARNING, ("Protocol-Reject for unsupported protocol 0x%x\n", prot));
dirkx	0:a259777c45a3	481	}
dirkx	0:a259777c45a3	482
dirkx	0:a259777c45a3	483
dirkx	0:a259777c45a3	484	/*
dirkx	0:a259777c45a3	485	* lcp_protrej - A Protocol-Reject was received.
dirkx	0:a259777c45a3	486	*/
dirkx	0:a259777c45a3	487	static void
dirkx	0:a259777c45a3	488	lcp_protrej(int unit)
dirkx	0:a259777c45a3	489	{
dirkx	0:a259777c45a3	490	LWIP_UNUSED_ARG(unit);
dirkx	0:a259777c45a3	491	/*
dirkx	0:a259777c45a3	492	* Can't reject LCP!
dirkx	0:a259777c45a3	493	*/
dirkx	0:a259777c45a3	494	LCPDEBUG(LOG_WARNING, ("lcp_protrej: Received Protocol-Reject for LCP!\n"));
dirkx	0:a259777c45a3	495	fsm_protreject(&lcp_fsm[unit]);
dirkx	0:a259777c45a3	496	}
dirkx	0:a259777c45a3	497
dirkx	0:a259777c45a3	498
dirkx	0:a259777c45a3	499	/*
dirkx	0:a259777c45a3	500	* lcp_sprotrej - Send a Protocol-Reject for some protocol.
dirkx	0:a259777c45a3	501	*/
dirkx	0:a259777c45a3	502	void
dirkx	0:a259777c45a3	503	lcp_sprotrej(int unit, u_char *p, int len)
dirkx	0:a259777c45a3	504	{
dirkx	0:a259777c45a3	505	/*
dirkx	0:a259777c45a3	506	* Send back the protocol and the information field of the
dirkx	0:a259777c45a3	507	* rejected packet. We only get here if LCP is in the LS_OPENED state.
dirkx	0:a259777c45a3	508	*/
dirkx	0:a259777c45a3	509
dirkx	0:a259777c45a3	510	fsm_sdata(&lcp_fsm[unit], PROTREJ, ++lcp_fsm[unit].id, p, len);
dirkx	0:a259777c45a3	511	}
dirkx	0:a259777c45a3	512
dirkx	0:a259777c45a3	513
dirkx	0:a259777c45a3	514	/*
dirkx	0:a259777c45a3	515	* lcp_resetci - Reset our CI.
dirkx	0:a259777c45a3	516	*/
dirkx	0:a259777c45a3	517	static void
dirkx	0:a259777c45a3	518	lcp_resetci(fsm *f)
dirkx	0:a259777c45a3	519	{
dirkx	0:a259777c45a3	520	lcp_wantoptions[f->unit].magicnumber = magic();
dirkx	0:a259777c45a3	521	lcp_wantoptions[f->unit].numloops = 0;
dirkx	0:a259777c45a3	522	lcp_gotoptions[f->unit] = lcp_wantoptions[f->unit];
dirkx	0:a259777c45a3	523	peer_mru[f->unit] = PPP_MRU;
dirkx	0:a259777c45a3	524	auth_reset(f->unit);
dirkx	0:a259777c45a3	525	}
dirkx	0:a259777c45a3	526
dirkx	0:a259777c45a3	527
dirkx	0:a259777c45a3	528	/*
dirkx	0:a259777c45a3	529	* lcp_cilen - Return length of our CI.
dirkx	0:a259777c45a3	530	*/
dirkx	0:a259777c45a3	531	static int
dirkx	0:a259777c45a3	532	lcp_cilen(fsm *f)
dirkx	0:a259777c45a3	533	{
dirkx	0:a259777c45a3	534	lcp_options *go = &lcp_gotoptions[f->unit];
dirkx	0:a259777c45a3	535
dirkx	0:a259777c45a3	536	#define LENCIVOID(neg) ((neg) ? CILEN_VOID : 0)
dirkx	0:a259777c45a3	537	#define LENCICHAP(neg) ((neg) ? CILEN_CHAP : 0)
dirkx	0:a259777c45a3	538	#define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0)
dirkx	0:a259777c45a3	539	#define LENCILONG(neg) ((neg) ? CILEN_LONG : 0)
dirkx	0:a259777c45a3	540	#define LENCILQR(neg) ((neg) ? CILEN_LQR: 0)
dirkx	0:a259777c45a3	541	#define LENCICBCP(neg) ((neg) ? CILEN_CBCP: 0)
dirkx	0:a259777c45a3	542	/*
dirkx	0:a259777c45a3	543	* NB: we only ask for one of CHAP and UPAP, even if we will
dirkx	0:a259777c45a3	544	* accept either.
dirkx	0:a259777c45a3	545	*/
dirkx	0:a259777c45a3	546	return (LENCISHORT(go->neg_mru && go->mru != PPP_DEFMRU) +
dirkx	0:a259777c45a3	547	LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) +
dirkx	0:a259777c45a3	548	LENCICHAP(go->neg_chap) +
dirkx	0:a259777c45a3	549	LENCISHORT(!go->neg_chap && go->neg_upap) +
dirkx	0:a259777c45a3	550	LENCILQR(go->neg_lqr) +
dirkx	0:a259777c45a3	551	LENCICBCP(go->neg_cbcp) +
dirkx	0:a259777c45a3	552	LENCILONG(go->neg_magicnumber) +
dirkx	0:a259777c45a3	553	LENCIVOID(go->neg_pcompression) +
dirkx	0:a259777c45a3	554	LENCIVOID(go->neg_accompression));
dirkx	0:a259777c45a3	555	}
dirkx	0:a259777c45a3	556
dirkx	0:a259777c45a3	557
dirkx	0:a259777c45a3	558	/*
dirkx	0:a259777c45a3	559	* lcp_addci - Add our desired CIs to a packet.
dirkx	0:a259777c45a3	560	*/
dirkx	0:a259777c45a3	561	static void
dirkx	0:a259777c45a3	562	lcp_addci(fsm f, u_char ucp, int *lenp)
dirkx	0:a259777c45a3	563	{
dirkx	0:a259777c45a3	564	lcp_options *go = &lcp_gotoptions[f->unit];
dirkx	0:a259777c45a3	565	u_char *start_ucp = ucp;
dirkx	0:a259777c45a3	566
dirkx	0:a259777c45a3	567	#define ADDCIVOID(opt, neg) \
dirkx	0:a259777c45a3	568	if (neg) { \
dirkx	0:a259777c45a3	569	LCPDEBUG(LOG_INFO, ("lcp_addci: opt=%d\n", opt)); \
dirkx	0:a259777c45a3	570	PUTCHAR(opt, ucp); \
dirkx	0:a259777c45a3	571	PUTCHAR(CILEN_VOID, ucp); \
dirkx	0:a259777c45a3	572	}
dirkx	0:a259777c45a3	573	#define ADDCISHORT(opt, neg, val) \
dirkx	0:a259777c45a3	574	if (neg) { \
dirkx	0:a259777c45a3	575	LCPDEBUG(LOG_INFO, ("lcp_addci: INT opt=%d %X\n", opt, val)); \
dirkx	0:a259777c45a3	576	PUTCHAR(opt, ucp); \
dirkx	0:a259777c45a3	577	PUTCHAR(CILEN_SHORT, ucp); \
dirkx	0:a259777c45a3	578	PUTSHORT(val, ucp); \
dirkx	0:a259777c45a3	579	}
dirkx	0:a259777c45a3	580	#define ADDCICHAP(opt, neg, val, digest) \
dirkx	0:a259777c45a3	581	if (neg) { \
dirkx	0:a259777c45a3	582	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAP opt=%d %X\n", opt, val)); \
dirkx	0:a259777c45a3	583	PUTCHAR(opt, ucp); \
dirkx	0:a259777c45a3	584	PUTCHAR(CILEN_CHAP, ucp); \
dirkx	0:a259777c45a3	585	PUTSHORT(val, ucp); \
dirkx	0:a259777c45a3	586	PUTCHAR(digest, ucp); \
dirkx	0:a259777c45a3	587	}
dirkx	0:a259777c45a3	588	#define ADDCILONG(opt, neg, val) \
dirkx	0:a259777c45a3	589	if (neg) { \
dirkx	0:a259777c45a3	590	LCPDEBUG(LOG_INFO, ("lcp_addci: L opt=%d %lX\n", opt, val)); \
dirkx	0:a259777c45a3	591	PUTCHAR(opt, ucp); \
dirkx	0:a259777c45a3	592	PUTCHAR(CILEN_LONG, ucp); \
dirkx	0:a259777c45a3	593	PUTLONG(val, ucp); \
dirkx	0:a259777c45a3	594	}
dirkx	0:a259777c45a3	595	#define ADDCILQR(opt, neg, val) \
dirkx	0:a259777c45a3	596	if (neg) { \
dirkx	0:a259777c45a3	597	LCPDEBUG(LOG_INFO, ("lcp_addci: LQR opt=%d %lX\n", opt, val)); \
dirkx	0:a259777c45a3	598	PUTCHAR(opt, ucp); \
dirkx	0:a259777c45a3	599	PUTCHAR(CILEN_LQR, ucp); \
dirkx	0:a259777c45a3	600	PUTSHORT(PPP_LQR, ucp); \
dirkx	0:a259777c45a3	601	PUTLONG(val, ucp); \
dirkx	0:a259777c45a3	602	}
dirkx	0:a259777c45a3	603	#define ADDCICHAR(opt, neg, val) \
dirkx	0:a259777c45a3	604	if (neg) { \
dirkx	0:a259777c45a3	605	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAR opt=%d %X '%z'\n", opt, val, val)); \
dirkx	0:a259777c45a3	606	PUTCHAR(opt, ucp); \
dirkx	0:a259777c45a3	607	PUTCHAR(CILEN_CHAR, ucp); \
dirkx	0:a259777c45a3	608	PUTCHAR(val, ucp); \
dirkx	0:a259777c45a3	609	}
dirkx	0:a259777c45a3	610
dirkx	0:a259777c45a3	611	ADDCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
dirkx	0:a259777c45a3	612	ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
dirkx	0:a259777c45a3	613	ADDCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
dirkx	0:a259777c45a3	614	ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
dirkx	0:a259777c45a3	615	ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
dirkx	0:a259777c45a3	616	ADDCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
dirkx	0:a259777c45a3	617	ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
dirkx	0:a259777c45a3	618	ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
dirkx	0:a259777c45a3	619	ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
dirkx	0:a259777c45a3	620
dirkx	0:a259777c45a3	621	if (ucp - start_ucp != *lenp) {
dirkx	0:a259777c45a3	622	/* this should never happen, because peer_mtu should be 1500 */
dirkx	0:a259777c45a3	623	LCPDEBUG(LOG_ERR, ("Bug in lcp_addci: wrong length\n"));
dirkx	0:a259777c45a3	624	}
dirkx	0:a259777c45a3	625	}
dirkx	0:a259777c45a3	626
dirkx	0:a259777c45a3	627
dirkx	0:a259777c45a3	628	/*
dirkx	0:a259777c45a3	629	* lcp_ackci - Ack our CIs.
dirkx	0:a259777c45a3	630	* This should not modify any state if the Ack is bad.
dirkx	0:a259777c45a3	631	*
dirkx	0:a259777c45a3	632	* Returns:
dirkx	0:a259777c45a3	633	* 0 - Ack was bad.
dirkx	0:a259777c45a3	634	* 1 - Ack was good.
dirkx	0:a259777c45a3	635	*/
dirkx	0:a259777c45a3	636	static int
dirkx	0:a259777c45a3	637	lcp_ackci(fsm f, u_char p, int len)
dirkx	0:a259777c45a3	638	{
dirkx	0:a259777c45a3	639	lcp_options *go = &lcp_gotoptions[f->unit];
dirkx	0:a259777c45a3	640	u_char cilen, citype, cichar;
dirkx	0:a259777c45a3	641	u_short cishort;
dirkx	0:a259777c45a3	642	u32_t cilong;
dirkx	0:a259777c45a3	643
dirkx	0:a259777c45a3	644	/*
dirkx	0:a259777c45a3	645	* CIs must be in exactly the same order that we sent.
dirkx	0:a259777c45a3	646	* Check packet length and CI length at each step.
dirkx	0:a259777c45a3	647	* If we find any deviations, then this packet is bad.
dirkx	0:a259777c45a3	648	*/
dirkx	0:a259777c45a3	649	#define ACKCIVOID(opt, neg) \
dirkx	0:a259777c45a3	650	if (neg) { \
dirkx	0:a259777c45a3	651	if ((len -= CILEN_VOID) < 0) \
dirkx	0:a259777c45a3	652	goto bad; \
dirkx	0:a259777c45a3	653	GETCHAR(citype, p); \
dirkx	0:a259777c45a3	654	GETCHAR(cilen, p); \
dirkx	0:a259777c45a3	655	if (cilen != CILEN_VOID \|\| citype != opt) \
dirkx	0:a259777c45a3	656	goto bad; \
dirkx	0:a259777c45a3	657	}
dirkx	0:a259777c45a3	658	#define ACKCISHORT(opt, neg, val) \
dirkx	0:a259777c45a3	659	if (neg) { \
dirkx	0:a259777c45a3	660	if ((len -= CILEN_SHORT) < 0) \
dirkx	0:a259777c45a3	661	goto bad; \
dirkx	0:a259777c45a3	662	GETCHAR(citype, p); \
dirkx	0:a259777c45a3	663	GETCHAR(cilen, p); \
dirkx	0:a259777c45a3	664	if (cilen != CILEN_SHORT \|\| citype != opt) \
dirkx	0:a259777c45a3	665	goto bad; \
dirkx	0:a259777c45a3	666	GETSHORT(cishort, p); \
dirkx	0:a259777c45a3	667	if (cishort != val) \
dirkx	0:a259777c45a3	668	goto bad; \
dirkx	0:a259777c45a3	669	}
dirkx	0:a259777c45a3	670	#define ACKCICHAR(opt, neg, val) \
dirkx	0:a259777c45a3	671	if (neg) { \
dirkx	0:a259777c45a3	672	if ((len -= CILEN_CHAR) < 0) \
dirkx	0:a259777c45a3	673	goto bad; \
dirkx	0:a259777c45a3	674	GETCHAR(citype, p); \
dirkx	0:a259777c45a3	675	GETCHAR(cilen, p); \
dirkx	0:a259777c45a3	676	if (cilen != CILEN_CHAR \|\| citype != opt) \
dirkx	0:a259777c45a3	677	goto bad; \
dirkx	0:a259777c45a3	678	GETCHAR(cichar, p); \
dirkx	0:a259777c45a3	679	if (cichar != val) \
dirkx	0:a259777c45a3	680	goto bad; \
dirkx	0:a259777c45a3	681	}
dirkx	0:a259777c45a3	682	#define ACKCICHAP(opt, neg, val, digest) \
dirkx	0:a259777c45a3	683	if (neg) { \
dirkx	0:a259777c45a3	684	if ((len -= CILEN_CHAP) < 0) \
dirkx	0:a259777c45a3	685	goto bad; \
dirkx	0:a259777c45a3	686	GETCHAR(citype, p); \
dirkx	0:a259777c45a3	687	GETCHAR(cilen, p); \
dirkx	0:a259777c45a3	688	if (cilen != CILEN_CHAP \|\| citype != opt) \
dirkx	0:a259777c45a3	689	goto bad; \
dirkx	0:a259777c45a3	690	GETSHORT(cishort, p); \
dirkx	0:a259777c45a3	691	if (cishort != val) \
dirkx	0:a259777c45a3	692	goto bad; \
dirkx	0:a259777c45a3	693	GETCHAR(cichar, p); \
dirkx	0:a259777c45a3	694	if (cichar != digest) \
dirkx	0:a259777c45a3	695	goto bad; \
dirkx	0:a259777c45a3	696	}
dirkx	0:a259777c45a3	697	#define ACKCILONG(opt, neg, val) \
dirkx	0:a259777c45a3	698	if (neg) { \
dirkx	0:a259777c45a3	699	if ((len -= CILEN_LONG) < 0) \
dirkx	0:a259777c45a3	700	goto bad; \
dirkx	0:a259777c45a3	701	GETCHAR(citype, p); \
dirkx	0:a259777c45a3	702	GETCHAR(cilen, p); \
dirkx	0:a259777c45a3	703	if (cilen != CILEN_LONG \|\| citype != opt) \
dirkx	0:a259777c45a3	704	goto bad; \
dirkx	0:a259777c45a3	705	GETLONG(cilong, p); \
dirkx	0:a259777c45a3	706	if (cilong != val) \
dirkx	0:a259777c45a3	707	goto bad; \
dirkx	0:a259777c45a3	708	}
dirkx	0:a259777c45a3	709	#define ACKCILQR(opt, neg, val) \
dirkx	0:a259777c45a3	710	if (neg) { \
dirkx	0:a259777c45a3	711	if ((len -= CILEN_LQR) < 0) \
dirkx	0:a259777c45a3	712	goto bad; \
dirkx	0:a259777c45a3	713	GETCHAR(citype, p); \
dirkx	0:a259777c45a3	714	GETCHAR(cilen, p); \
dirkx	0:a259777c45a3	715	if (cilen != CILEN_LQR \|\| citype != opt) \
dirkx	0:a259777c45a3	716	goto bad; \
dirkx	0:a259777c45a3	717	GETSHORT(cishort, p); \
dirkx	0:a259777c45a3	718	if (cishort != PPP_LQR) \
dirkx	0:a259777c45a3	719	goto bad; \
dirkx	0:a259777c45a3	720	GETLONG(cilong, p); \
dirkx	0:a259777c45a3	721	if (cilong != val) \
dirkx	0:a259777c45a3	722	goto bad; \
dirkx	0:a259777c45a3	723	}
dirkx	0:a259777c45a3	724
dirkx	0:a259777c45a3	725	ACKCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
dirkx	0:a259777c45a3	726	ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
dirkx	0:a259777c45a3	727	ACKCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
dirkx	0:a259777c45a3	728	ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
dirkx	0:a259777c45a3	729	ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
dirkx	0:a259777c45a3	730	ACKCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
dirkx	0:a259777c45a3	731	ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
dirkx	0:a259777c45a3	732	ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
dirkx	0:a259777c45a3	733	ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
dirkx	0:a259777c45a3	734
dirkx	0:a259777c45a3	735	/*
dirkx	0:a259777c45a3	736	* If there are any remaining CIs, then this packet is bad.
dirkx	0:a259777c45a3	737	*/
dirkx	0:a259777c45a3	738	if (len != 0) {
dirkx	0:a259777c45a3	739	goto bad;
dirkx	0:a259777c45a3	740	}
dirkx	0:a259777c45a3	741	LCPDEBUG(LOG_INFO, ("lcp_acki: Ack\n"));
dirkx	0:a259777c45a3	742	return (1);
dirkx	0:a259777c45a3	743	bad:
dirkx	0:a259777c45a3	744	LCPDEBUG(LOG_WARNING, ("lcp_acki: received bad Ack!\n"));
dirkx	0:a259777c45a3	745	return (0);
dirkx	0:a259777c45a3	746	}
dirkx	0:a259777c45a3	747
dirkx	0:a259777c45a3	748
dirkx	0:a259777c45a3	749	/*
dirkx	0:a259777c45a3	750	* lcp_nakci - Peer has sent a NAK for some of our CIs.
dirkx	0:a259777c45a3	751	* This should not modify any state if the Nak is bad
dirkx	0:a259777c45a3	752	* or if LCP is in the LS_OPENED state.
dirkx	0:a259777c45a3	753	*
dirkx	0:a259777c45a3	754	* Returns:
dirkx	0:a259777c45a3	755	* 0 - Nak was bad.
dirkx	0:a259777c45a3	756	* 1 - Nak was good.
dirkx	0:a259777c45a3	757	*/
dirkx	0:a259777c45a3	758	static int
dirkx	0:a259777c45a3	759	lcp_nakci(fsm f, u_char p, int len)
dirkx	0:a259777c45a3	760	{
dirkx	0:a259777c45a3	761	lcp_options *go = &lcp_gotoptions[f->unit];
dirkx	0:a259777c45a3	762	lcp_options *wo = &lcp_wantoptions[f->unit];
dirkx	0:a259777c45a3	763	u_char citype, cichar, *next;
dirkx	0:a259777c45a3	764	u_short cishort;
dirkx	0:a259777c45a3	765	u32_t cilong;
dirkx	0:a259777c45a3	766	lcp_options no; /* options we've seen Naks for */
dirkx	0:a259777c45a3	767	lcp_options try; /* options to request next time */
dirkx	0:a259777c45a3	768	int looped_back = 0;
dirkx	0:a259777c45a3	769	int cilen;
dirkx	0:a259777c45a3	770
dirkx	0:a259777c45a3	771	BZERO(&no, sizeof(no));
dirkx	0:a259777c45a3	772	try = *go;
dirkx	0:a259777c45a3	773
dirkx	0:a259777c45a3	774	/*
dirkx	0:a259777c45a3	775	* Any Nak'd CIs must be in exactly the same order that we sent.
dirkx	0:a259777c45a3	776	* Check packet length and CI length at each step.
dirkx	0:a259777c45a3	777	* If we find any deviations, then this packet is bad.
dirkx	0:a259777c45a3	778	*/
dirkx	0:a259777c45a3	779	#define NAKCIVOID(opt, neg, code) \
dirkx	0:a259777c45a3	780	if (go->neg && \
dirkx	0:a259777c45a3	781	len >= CILEN_VOID && \
dirkx	0:a259777c45a3	782	p[1] == CILEN_VOID && \
dirkx	0:a259777c45a3	783	p[0] == opt) { \
dirkx	0:a259777c45a3	784	len -= CILEN_VOID; \
dirkx	0:a259777c45a3	785	INCPTR(CILEN_VOID, p); \
dirkx	0:a259777c45a3	786	no.neg = 1; \
dirkx	0:a259777c45a3	787	code \
dirkx	0:a259777c45a3	788	}
dirkx	0:a259777c45a3	789	#define NAKCICHAP(opt, neg, code) \
dirkx	0:a259777c45a3	790	if (go->neg && \
dirkx	0:a259777c45a3	791	len >= CILEN_CHAP && \
dirkx	0:a259777c45a3	792	p[1] == CILEN_CHAP && \
dirkx	0:a259777c45a3	793	p[0] == opt) { \
dirkx	0:a259777c45a3	794	len -= CILEN_CHAP; \
dirkx	0:a259777c45a3	795	INCPTR(2, p); \
dirkx	0:a259777c45a3	796	GETSHORT(cishort, p); \
dirkx	0:a259777c45a3	797	GETCHAR(cichar, p); \
dirkx	0:a259777c45a3	798	no.neg = 1; \
dirkx	0:a259777c45a3	799	code \
dirkx	0:a259777c45a3	800	}
dirkx	0:a259777c45a3	801	#define NAKCICHAR(opt, neg, code) \
dirkx	0:a259777c45a3	802	if (go->neg && \
dirkx	0:a259777c45a3	803	len >= CILEN_CHAR && \
dirkx	0:a259777c45a3	804	p[1] == CILEN_CHAR && \
dirkx	0:a259777c45a3	805	p[0] == opt) { \
dirkx	0:a259777c45a3	806	len -= CILEN_CHAR; \
dirkx	0:a259777c45a3	807	INCPTR(2, p); \
dirkx	0:a259777c45a3	808	GETCHAR(cichar, p); \
dirkx	0:a259777c45a3	809	no.neg = 1; \
dirkx	0:a259777c45a3	810	code \
dirkx	0:a259777c45a3	811	}
dirkx	0:a259777c45a3	812	#define NAKCISHORT(opt, neg, code) \
dirkx	0:a259777c45a3	813	if (go->neg && \
dirkx	0:a259777c45a3	814	len >= CILEN_SHORT && \
dirkx	0:a259777c45a3	815	p[1] == CILEN_SHORT && \
dirkx	0:a259777c45a3	816	p[0] == opt) { \
dirkx	0:a259777c45a3	817	len -= CILEN_SHORT; \
dirkx	0:a259777c45a3	818	INCPTR(2, p); \
dirkx	0:a259777c45a3	819	GETSHORT(cishort, p); \
dirkx	0:a259777c45a3	820	no.neg = 1; \
dirkx	0:a259777c45a3	821	code \
dirkx	0:a259777c45a3	822	}
dirkx	0:a259777c45a3	823	#define NAKCILONG(opt, neg, code) \
dirkx	0:a259777c45a3	824	if (go->neg && \
dirkx	0:a259777c45a3	825	len >= CILEN_LONG && \
dirkx	0:a259777c45a3	826	p[1] == CILEN_LONG && \
dirkx	0:a259777c45a3	827	p[0] == opt) { \
dirkx	0:a259777c45a3	828	len -= CILEN_LONG; \
dirkx	0:a259777c45a3	829	INCPTR(2, p); \
dirkx	0:a259777c45a3	830	GETLONG(cilong, p); \
dirkx	0:a259777c45a3	831	no.neg = 1; \
dirkx	0:a259777c45a3	832	code \
dirkx	0:a259777c45a3	833	}
dirkx	0:a259777c45a3	834	#define NAKCILQR(opt, neg, code) \
dirkx	0:a259777c45a3	835	if (go->neg && \
dirkx	0:a259777c45a3	836	len >= CILEN_LQR && \
dirkx	0:a259777c45a3	837	p[1] == CILEN_LQR && \
dirkx	0:a259777c45a3	838	p[0] == opt) { \
dirkx	0:a259777c45a3	839	len -= CILEN_LQR; \
dirkx	0:a259777c45a3	840	INCPTR(2, p); \
dirkx	0:a259777c45a3	841	GETSHORT(cishort, p); \
dirkx	0:a259777c45a3	842	GETLONG(cilong, p); \
dirkx	0:a259777c45a3	843	no.neg = 1; \
dirkx	0:a259777c45a3	844	code \
dirkx	0:a259777c45a3	845	}
dirkx	0:a259777c45a3	846
dirkx	0:a259777c45a3	847	/*
dirkx	0:a259777c45a3	848	* We don't care if they want to send us smaller packets than
dirkx	0:a259777c45a3	849	* we want. Therefore, accept any MRU less than what we asked for,
dirkx	0:a259777c45a3	850	* but then ignore the new value when setting the MRU in the kernel.
dirkx	0:a259777c45a3	851	* If they send us a bigger MRU than what we asked, accept it, up to
dirkx	0:a259777c45a3	852	* the limit of the default MRU we'd get if we didn't negotiate.
dirkx	0:a259777c45a3	853	*/
dirkx	0:a259777c45a3	854	if (go->neg_mru && go->mru != PPP_DEFMRU) {
dirkx	0:a259777c45a3	855	NAKCISHORT(CI_MRU, neg_mru,
dirkx	0:a259777c45a3	856	if (cishort <= wo->mru \|\| cishort < PPP_DEFMRU) {
dirkx	0:a259777c45a3	857	try.mru = cishort;
dirkx	0:a259777c45a3	858	}
dirkx	0:a259777c45a3	859	);
dirkx	0:a259777c45a3	860	}
dirkx	0:a259777c45a3	861
dirkx	0:a259777c45a3	862	/*
dirkx	0:a259777c45a3	863	* Add any characters they want to our (receive-side) asyncmap.
dirkx	0:a259777c45a3	864	*/
dirkx	0:a259777c45a3	865	if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) {
dirkx	0:a259777c45a3	866	NAKCILONG(CI_ASYNCMAP, neg_asyncmap,
dirkx	0:a259777c45a3	867	try.asyncmap = go->asyncmap \| cilong;
dirkx	0:a259777c45a3	868	);
dirkx	0:a259777c45a3	869	}
dirkx	0:a259777c45a3	870
dirkx	0:a259777c45a3	871	/*
dirkx	0:a259777c45a3	872	* If they've nak'd our authentication-protocol, check whether
dirkx	0:a259777c45a3	873	* they are proposing a different protocol, or a different
dirkx	0:a259777c45a3	874	* hash algorithm for CHAP.
dirkx	0:a259777c45a3	875	*/
dirkx	0:a259777c45a3	876	if ((go->neg_chap \|\| go->neg_upap)
dirkx	0:a259777c45a3	877	&& len >= CILEN_SHORT
dirkx	0:a259777c45a3	878	&& p[0] == CI_AUTHTYPE && p[1] >= CILEN_SHORT && p[1] <= len) {
dirkx	0:a259777c45a3	879	cilen = p[1];
dirkx	0:a259777c45a3	880	len -= cilen;
dirkx	0:a259777c45a3	881	no.neg_chap = go->neg_chap;
dirkx	0:a259777c45a3	882	no.neg_upap = go->neg_upap;
dirkx	0:a259777c45a3	883	INCPTR(2, p);
dirkx	0:a259777c45a3	884	GETSHORT(cishort, p);
dirkx	0:a259777c45a3	885	if (cishort == PPP_PAP && cilen == CILEN_SHORT) {
dirkx	0:a259777c45a3	886	/*
dirkx	0:a259777c45a3	887	* If we were asking for CHAP, they obviously don't want to do it.
dirkx	0:a259777c45a3	888	* If we weren't asking for CHAP, then we were asking for PAP,
dirkx	0:a259777c45a3	889	* in which case this Nak is bad.
dirkx	0:a259777c45a3	890	*/
dirkx	0:a259777c45a3	891	if (!go->neg_chap) {
dirkx	0:a259777c45a3	892	goto bad;
dirkx	0:a259777c45a3	893	}
dirkx	0:a259777c45a3	894	try.neg_chap = 0;
dirkx	0:a259777c45a3	895
dirkx	0:a259777c45a3	896	} else if (cishort == PPP_CHAP && cilen == CILEN_CHAP) {
dirkx	0:a259777c45a3	897	GETCHAR(cichar, p);
dirkx	0:a259777c45a3	898	if (go->neg_chap) {
dirkx	0:a259777c45a3	899	/*
dirkx	0:a259777c45a3	900	* We were asking for CHAP/MD5; they must want a different
dirkx	0:a259777c45a3	901	* algorithm. If they can't do MD5, we'll have to stop
dirkx	0:a259777c45a3	902	* asking for CHAP.
dirkx	0:a259777c45a3	903	*/
dirkx	0:a259777c45a3	904	if (cichar != go->chap_mdtype) {
dirkx	0:a259777c45a3	905	try.neg_chap = 0;
dirkx	0:a259777c45a3	906	}
dirkx	0:a259777c45a3	907	} else {
dirkx	0:a259777c45a3	908	/*
dirkx	0:a259777c45a3	909	* Stop asking for PAP if we were asking for it.
dirkx	0:a259777c45a3	910	*/
dirkx	0:a259777c45a3	911	try.neg_upap = 0;
dirkx	0:a259777c45a3	912	}
dirkx	0:a259777c45a3	913
dirkx	0:a259777c45a3	914	} else {
dirkx	0:a259777c45a3	915	/*
dirkx	0:a259777c45a3	916	* We don't recognize what they're suggesting.
dirkx	0:a259777c45a3	917	* Stop asking for what we were asking for.
dirkx	0:a259777c45a3	918	*/
dirkx	0:a259777c45a3	919	if (go->neg_chap) {
dirkx	0:a259777c45a3	920	try.neg_chap = 0;
dirkx	0:a259777c45a3	921	} else {
dirkx	0:a259777c45a3	922	try.neg_upap = 0;
dirkx	0:a259777c45a3	923	}
dirkx	0:a259777c45a3	924	p += cilen - CILEN_SHORT;
dirkx	0:a259777c45a3	925	}
dirkx	0:a259777c45a3	926	}
dirkx	0:a259777c45a3	927
dirkx	0:a259777c45a3	928	/*
dirkx	0:a259777c45a3	929	* If they can't cope with our link quality protocol, we'll have
dirkx	0:a259777c45a3	930	* to stop asking for LQR. We haven't got any other protocol.
dirkx	0:a259777c45a3	931	* If they Nak the reporting period, take their value XXX ?
dirkx	0:a259777c45a3	932	*/
dirkx	0:a259777c45a3	933	NAKCILQR(CI_QUALITY, neg_lqr,
dirkx	0:a259777c45a3	934	if (cishort != PPP_LQR) {
dirkx	0:a259777c45a3	935	try.neg_lqr = 0;
dirkx	0:a259777c45a3	936	} else {
dirkx	0:a259777c45a3	937	try.lqr_period = cilong;
dirkx	0:a259777c45a3	938	}
dirkx	0:a259777c45a3	939	);
dirkx	0:a259777c45a3	940
dirkx	0:a259777c45a3	941	/*
dirkx	0:a259777c45a3	942	* Only implementing CBCP...not the rest of the callback options
dirkx	0:a259777c45a3	943	*/
dirkx	0:a259777c45a3	944	NAKCICHAR(CI_CALLBACK, neg_cbcp,
dirkx	0:a259777c45a3	945	try.neg_cbcp = 0;
dirkx	0:a259777c45a3	946	);
dirkx	0:a259777c45a3	947
dirkx	0:a259777c45a3	948	/*
dirkx	0:a259777c45a3	949	* Check for a looped-back line.
dirkx	0:a259777c45a3	950	*/
dirkx	0:a259777c45a3	951	NAKCILONG(CI_MAGICNUMBER, neg_magicnumber,
dirkx	0:a259777c45a3	952	try.magicnumber = magic();
dirkx	0:a259777c45a3	953	looped_back = 1;
dirkx	0:a259777c45a3	954	);
dirkx	0:a259777c45a3	955
dirkx	0:a259777c45a3	956	/*
dirkx	0:a259777c45a3	957	* Peer shouldn't send Nak for protocol compression or
dirkx	0:a259777c45a3	958	* address/control compression requests; they should send
dirkx	0:a259777c45a3	959	* a Reject instead. If they send a Nak, treat it as a Reject.
dirkx	0:a259777c45a3	960	*/
dirkx	0:a259777c45a3	961	NAKCIVOID(CI_PCOMPRESSION, neg_pcompression,
dirkx	0:a259777c45a3	962	try.neg_pcompression = 0;
dirkx	0:a259777c45a3	963	);
dirkx	0:a259777c45a3	964	NAKCIVOID(CI_ACCOMPRESSION, neg_accompression,
dirkx	0:a259777c45a3	965	try.neg_accompression = 0;
dirkx	0:a259777c45a3	966	);
dirkx	0:a259777c45a3	967
dirkx	0:a259777c45a3	968	/*
dirkx	0:a259777c45a3	969	* There may be remaining CIs, if the peer is requesting negotiation
dirkx	0:a259777c45a3	970	* on an option that we didn't include in our request packet.
dirkx	0:a259777c45a3	971	* If we see an option that we requested, or one we've already seen
dirkx	0:a259777c45a3	972	* in this packet, then this packet is bad.
dirkx	0:a259777c45a3	973	* If we wanted to respond by starting to negotiate on the requested
dirkx	0:a259777c45a3	974	* option(s), we could, but we don't, because except for the
dirkx	0:a259777c45a3	975	* authentication type and quality protocol, if we are not negotiating
dirkx	0:a259777c45a3	976	* an option, it is because we were told not to.
dirkx	0:a259777c45a3	977	* For the authentication type, the Nak from the peer means
dirkx	0:a259777c45a3	978	* `let me authenticate myself with you' which is a bit pointless.
dirkx	0:a259777c45a3	979	* For the quality protocol, the Nak means `ask me to send you quality
dirkx	0:a259777c45a3	980	* reports', but if we didn't ask for them, we don't want them.
dirkx	0:a259777c45a3	981	* An option we don't recognize represents the peer asking to
dirkx	0:a259777c45a3	982	* negotiate some option we don't support, so ignore it.
dirkx	0:a259777c45a3	983	*/
dirkx	0:a259777c45a3	984	while (len > CILEN_VOID) {
dirkx	0:a259777c45a3	985	GETCHAR(citype, p);
dirkx	0:a259777c45a3	986	GETCHAR(cilen, p);
dirkx	0:a259777c45a3	987	if (cilen < CILEN_VOID \|\| (len -= cilen) < 0) {
dirkx	0:a259777c45a3	988	goto bad;
dirkx	0:a259777c45a3	989	}
dirkx	0:a259777c45a3	990	next = p + cilen - 2;
dirkx	0:a259777c45a3	991
dirkx	0:a259777c45a3	992	switch (citype) {
dirkx	0:a259777c45a3	993	case CI_MRU:
dirkx	0:a259777c45a3	994	if ((go->neg_mru && go->mru != PPP_DEFMRU)
dirkx	0:a259777c45a3	995	\|\| no.neg_mru \|\| cilen != CILEN_SHORT) {
dirkx	0:a259777c45a3	996	goto bad;
dirkx	0:a259777c45a3	997	}
dirkx	0:a259777c45a3	998	GETSHORT(cishort, p);
dirkx	0:a259777c45a3	999	if (cishort < PPP_DEFMRU) {
dirkx	0:a259777c45a3	1000	try.mru = cishort;
dirkx	0:a259777c45a3	1001	}
dirkx	0:a259777c45a3	1002	break;
dirkx	0:a259777c45a3	1003	case CI_ASYNCMAP:
dirkx	0:a259777c45a3	1004	if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl)
dirkx	0:a259777c45a3	1005	\|\| no.neg_asyncmap \|\| cilen != CILEN_LONG) {
dirkx	0:a259777c45a3	1006	goto bad;
dirkx	0:a259777c45a3	1007	}
dirkx	0:a259777c45a3	1008	break;
dirkx	0:a259777c45a3	1009	case CI_AUTHTYPE:
dirkx	0:a259777c45a3	1010	if (go->neg_chap \|\| no.neg_chap \|\| go->neg_upap \|\| no.neg_upap) {
dirkx	0:a259777c45a3	1011	goto bad;
dirkx	0:a259777c45a3	1012	}
dirkx	0:a259777c45a3	1013	break;
dirkx	0:a259777c45a3	1014	case CI_MAGICNUMBER:
dirkx	0:a259777c45a3	1015	if (go->neg_magicnumber \|\| no.neg_magicnumber \|\|
dirkx	0:a259777c45a3	1016	cilen != CILEN_LONG) {
dirkx	0:a259777c45a3	1017	goto bad;
dirkx	0:a259777c45a3	1018	}
dirkx	0:a259777c45a3	1019	break;
dirkx	0:a259777c45a3	1020	case CI_PCOMPRESSION:
dirkx	0:a259777c45a3	1021	if (go->neg_pcompression \|\| no.neg_pcompression
dirkx	0:a259777c45a3	1022	\|\| cilen != CILEN_VOID) {
dirkx	0:a259777c45a3	1023	goto bad;
dirkx	0:a259777c45a3	1024	}
dirkx	0:a259777c45a3	1025	break;
dirkx	0:a259777c45a3	1026	case CI_ACCOMPRESSION:
dirkx	0:a259777c45a3	1027	if (go->neg_accompression \|\| no.neg_accompression
dirkx	0:a259777c45a3	1028	\|\| cilen != CILEN_VOID) {
dirkx	0:a259777c45a3	1029	goto bad;
dirkx	0:a259777c45a3	1030	}
dirkx	0:a259777c45a3	1031	break;
dirkx	0:a259777c45a3	1032	case CI_QUALITY:
dirkx	0:a259777c45a3	1033	if (go->neg_lqr \|\| no.neg_lqr \|\| cilen != CILEN_LQR) {
dirkx	0:a259777c45a3	1034	goto bad;
dirkx	0:a259777c45a3	1035	}
dirkx	0:a259777c45a3	1036	break;
dirkx	0:a259777c45a3	1037	}
dirkx	0:a259777c45a3	1038	p = next;
dirkx	0:a259777c45a3	1039	}
dirkx	0:a259777c45a3	1040
dirkx	0:a259777c45a3	1041	/* If there is still anything left, this packet is bad. */
dirkx	0:a259777c45a3	1042	if (len != 0) {
dirkx	0:a259777c45a3	1043	goto bad;
dirkx	0:a259777c45a3	1044	}
dirkx	0:a259777c45a3	1045
dirkx	0:a259777c45a3	1046	/*
dirkx	0:a259777c45a3	1047	* OK, the Nak is good. Now we can update state.
dirkx	0:a259777c45a3	1048	*/
dirkx	0:a259777c45a3	1049	if (f->state != LS_OPENED) {
dirkx	0:a259777c45a3	1050	if (looped_back) {
dirkx	0:a259777c45a3	1051	if (++try.numloops >= lcp_loopbackfail) {
dirkx	0:a259777c45a3	1052	LCPDEBUG(LOG_NOTICE, ("Serial line is looped back.\n"));
dirkx	0:a259777c45a3	1053	lcp_close(f->unit, "Loopback detected");
dirkx	0:a259777c45a3	1054	}
dirkx	0:a259777c45a3	1055	} else {
dirkx	0:a259777c45a3	1056	try.numloops = 0;
dirkx	0:a259777c45a3	1057	}
dirkx	0:a259777c45a3	1058	*go = try;
dirkx	0:a259777c45a3	1059	}
dirkx	0:a259777c45a3	1060
dirkx	0:a259777c45a3	1061	return 1;
dirkx	0:a259777c45a3	1062
dirkx	0:a259777c45a3	1063	bad:
dirkx	0:a259777c45a3	1064	LCPDEBUG(LOG_WARNING, ("lcp_nakci: received bad Nak!\n"));
dirkx	0:a259777c45a3	1065	return 0;
dirkx	0:a259777c45a3	1066	}
dirkx	0:a259777c45a3	1067
dirkx	0:a259777c45a3	1068
dirkx	0:a259777c45a3	1069	/*
dirkx	0:a259777c45a3	1070	* lcp_rejci - Peer has Rejected some of our CIs.
dirkx	0:a259777c45a3	1071	* This should not modify any state if the Reject is bad
dirkx	0:a259777c45a3	1072	* or if LCP is in the LS_OPENED state.
dirkx	0:a259777c45a3	1073	*
dirkx	0:a259777c45a3	1074	* Returns:
dirkx	0:a259777c45a3	1075	* 0 - Reject was bad.
dirkx	0:a259777c45a3	1076	* 1 - Reject was good.
dirkx	0:a259777c45a3	1077	*/
dirkx	0:a259777c45a3	1078	static int
dirkx	0:a259777c45a3	1079	lcp_rejci(fsm f, u_char p, int len)
dirkx	0:a259777c45a3	1080	{
dirkx	0:a259777c45a3	1081	lcp_options *go = &lcp_gotoptions[f->unit];
dirkx	0:a259777c45a3	1082	u_char cichar;
dirkx	0:a259777c45a3	1083	u_short cishort;
dirkx	0:a259777c45a3	1084	u32_t cilong;
dirkx	0:a259777c45a3	1085	lcp_options try; /* options to request next time */
dirkx	0:a259777c45a3	1086
dirkx	0:a259777c45a3	1087	try = *go;
dirkx	0:a259777c45a3	1088
dirkx	0:a259777c45a3	1089	/*
dirkx	0:a259777c45a3	1090	* Any Rejected CIs must be in exactly the same order that we sent.
dirkx	0:a259777c45a3	1091	* Check packet length and CI length at each step.
dirkx	0:a259777c45a3	1092	* If we find any deviations, then this packet is bad.
dirkx	0:a259777c45a3	1093	*/
dirkx	0:a259777c45a3	1094	#define REJCIVOID(opt, neg) \
dirkx	0:a259777c45a3	1095	if (go->neg && \
dirkx	0:a259777c45a3	1096	len >= CILEN_VOID && \
dirkx	0:a259777c45a3	1097	p[1] == CILEN_VOID && \
dirkx	0:a259777c45a3	1098	p[0] == opt) { \
dirkx	0:a259777c45a3	1099	len -= CILEN_VOID; \
dirkx	0:a259777c45a3	1100	INCPTR(CILEN_VOID, p); \
dirkx	0:a259777c45a3	1101	try.neg = 0; \
dirkx	0:a259777c45a3	1102	LCPDEBUG(LOG_INFO, ("lcp_rejci: void opt %d rejected\n", opt)); \
dirkx	0:a259777c45a3	1103	}
dirkx	0:a259777c45a3	1104	#define REJCISHORT(opt, neg, val) \
dirkx	0:a259777c45a3	1105	if (go->neg && \
dirkx	0:a259777c45a3	1106	len >= CILEN_SHORT && \
dirkx	0:a259777c45a3	1107	p[1] == CILEN_SHORT && \
dirkx	0:a259777c45a3	1108	p[0] == opt) { \
dirkx	0:a259777c45a3	1109	len -= CILEN_SHORT; \
dirkx	0:a259777c45a3	1110	INCPTR(2, p); \
dirkx	0:a259777c45a3	1111	GETSHORT(cishort, p); \
dirkx	0:a259777c45a3	1112	/* Check rejected value. */ \
dirkx	0:a259777c45a3	1113	if (cishort != val) { \
dirkx	0:a259777c45a3	1114	goto bad; \
dirkx	0:a259777c45a3	1115	} \
dirkx	0:a259777c45a3	1116	try.neg = 0; \
dirkx	0:a259777c45a3	1117	LCPDEBUG(LOG_INFO, ("lcp_rejci: short opt %d rejected\n", opt)); \
dirkx	0:a259777c45a3	1118	}
dirkx	0:a259777c45a3	1119	#define REJCICHAP(opt, neg, val, digest) \
dirkx	0:a259777c45a3	1120	if (go->neg && \
dirkx	0:a259777c45a3	1121	len >= CILEN_CHAP && \
dirkx	0:a259777c45a3	1122	p[1] == CILEN_CHAP && \
dirkx	0:a259777c45a3	1123	p[0] == opt) { \
dirkx	0:a259777c45a3	1124	len -= CILEN_CHAP; \
dirkx	0:a259777c45a3	1125	INCPTR(2, p); \
dirkx	0:a259777c45a3	1126	GETSHORT(cishort, p); \
dirkx	0:a259777c45a3	1127	GETCHAR(cichar, p); \
dirkx	0:a259777c45a3	1128	/* Check rejected value. */ \
dirkx	0:a259777c45a3	1129	if (cishort != val \|\| cichar != digest) { \
dirkx	0:a259777c45a3	1130	goto bad; \
dirkx	0:a259777c45a3	1131	} \
dirkx	0:a259777c45a3	1132	try.neg = 0; \
dirkx	0:a259777c45a3	1133	try.neg_upap = 0; \
dirkx	0:a259777c45a3	1134	LCPDEBUG(LOG_INFO, ("lcp_rejci: chap opt %d rejected\n", opt)); \
dirkx	0:a259777c45a3	1135	}
dirkx	0:a259777c45a3	1136	#define REJCILONG(opt, neg, val) \
dirkx	0:a259777c45a3	1137	if (go->neg && \
dirkx	0:a259777c45a3	1138	len >= CILEN_LONG && \
dirkx	0:a259777c45a3	1139	p[1] == CILEN_LONG && \
dirkx	0:a259777c45a3	1140	p[0] == opt) { \
dirkx	0:a259777c45a3	1141	len -= CILEN_LONG; \
dirkx	0:a259777c45a3	1142	INCPTR(2, p); \
dirkx	0:a259777c45a3	1143	GETLONG(cilong, p); \
dirkx	0:a259777c45a3	1144	/* Check rejected value. */ \
dirkx	0:a259777c45a3	1145	if (cilong != val) { \
dirkx	0:a259777c45a3	1146	goto bad; \
dirkx	0:a259777c45a3	1147	} \
dirkx	0:a259777c45a3	1148	try.neg = 0; \
dirkx	0:a259777c45a3	1149	LCPDEBUG(LOG_INFO, ("lcp_rejci: long opt %d rejected\n", opt)); \
dirkx	0:a259777c45a3	1150	}
dirkx	0:a259777c45a3	1151	#define REJCILQR(opt, neg, val) \
dirkx	0:a259777c45a3	1152	if (go->neg && \
dirkx	0:a259777c45a3	1153	len >= CILEN_LQR && \
dirkx	0:a259777c45a3	1154	p[1] == CILEN_LQR && \
dirkx	0:a259777c45a3	1155	p[0] == opt) { \
dirkx	0:a259777c45a3	1156	len -= CILEN_LQR; \
dirkx	0:a259777c45a3	1157	INCPTR(2, p); \
dirkx	0:a259777c45a3	1158	GETSHORT(cishort, p); \
dirkx	0:a259777c45a3	1159	GETLONG(cilong, p); \
dirkx	0:a259777c45a3	1160	/* Check rejected value. */ \
dirkx	0:a259777c45a3	1161	if (cishort != PPP_LQR \|\| cilong != val) { \
dirkx	0:a259777c45a3	1162	goto bad; \
dirkx	0:a259777c45a3	1163	} \
dirkx	0:a259777c45a3	1164	try.neg = 0; \
dirkx	0:a259777c45a3	1165	LCPDEBUG(LOG_INFO, ("lcp_rejci: LQR opt %d rejected\n", opt)); \
dirkx	0:a259777c45a3	1166	}
dirkx	0:a259777c45a3	1167	#define REJCICBCP(opt, neg, val) \
dirkx	0:a259777c45a3	1168	if (go->neg && \
dirkx	0:a259777c45a3	1169	len >= CILEN_CBCP && \
dirkx	0:a259777c45a3	1170	p[1] == CILEN_CBCP && \
dirkx	0:a259777c45a3	1171	p[0] == opt) { \
dirkx	0:a259777c45a3	1172	len -= CILEN_CBCP; \
dirkx	0:a259777c45a3	1173	INCPTR(2, p); \
dirkx	0:a259777c45a3	1174	GETCHAR(cichar, p); \
dirkx	0:a259777c45a3	1175	/* Check rejected value. */ \
dirkx	0:a259777c45a3	1176	if (cichar != val) { \
dirkx	0:a259777c45a3	1177	goto bad; \
dirkx	0:a259777c45a3	1178	} \
dirkx	0:a259777c45a3	1179	try.neg = 0; \
dirkx	0:a259777c45a3	1180	LCPDEBUG(LOG_INFO, ("lcp_rejci: Callback opt %d rejected\n", opt)); \
dirkx	0:a259777c45a3	1181	}
dirkx	0:a259777c45a3	1182
dirkx	0:a259777c45a3	1183	REJCISHORT(CI_MRU, neg_mru, go->mru);
dirkx	0:a259777c45a3	1184	REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap);
dirkx	0:a259777c45a3	1185	REJCICHAP(CI_AUTHTYPE, neg_chap, PPP_CHAP, go->chap_mdtype);
dirkx	0:a259777c45a3	1186	if (!go->neg_chap) {
dirkx	0:a259777c45a3	1187	REJCISHORT(CI_AUTHTYPE, neg_upap, PPP_PAP);
dirkx	0:a259777c45a3	1188	}
dirkx	0:a259777c45a3	1189	REJCILQR(CI_QUALITY, neg_lqr, go->lqr_period);
dirkx	0:a259777c45a3	1190	REJCICBCP(CI_CALLBACK, neg_cbcp, CBCP_OPT);
dirkx	0:a259777c45a3	1191	REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber);
dirkx	0:a259777c45a3	1192	REJCIVOID(CI_PCOMPRESSION, neg_pcompression);
dirkx	0:a259777c45a3	1193	REJCIVOID(CI_ACCOMPRESSION, neg_accompression);
dirkx	0:a259777c45a3	1194
dirkx	0:a259777c45a3	1195	/*
dirkx	0:a259777c45a3	1196	* If there are any remaining CIs, then this packet is bad.
dirkx	0:a259777c45a3	1197	*/
dirkx	0:a259777c45a3	1198	if (len != 0) {
dirkx	0:a259777c45a3	1199	goto bad;
dirkx	0:a259777c45a3	1200	}
dirkx	0:a259777c45a3	1201	/*
dirkx	0:a259777c45a3	1202	* Now we can update state.
dirkx	0:a259777c45a3	1203	*/
dirkx	0:a259777c45a3	1204	if (f->state != LS_OPENED) {
dirkx	0:a259777c45a3	1205	*go = try;
dirkx	0:a259777c45a3	1206	}
dirkx	0:a259777c45a3	1207	return 1;
dirkx	0:a259777c45a3	1208
dirkx	0:a259777c45a3	1209	bad:
dirkx	0:a259777c45a3	1210	LCPDEBUG(LOG_WARNING, ("lcp_rejci: received bad Reject!\n"));
dirkx	0:a259777c45a3	1211	return 0;
dirkx	0:a259777c45a3	1212	}
dirkx	0:a259777c45a3	1213
dirkx	0:a259777c45a3	1214
dirkx	0:a259777c45a3	1215	/*
dirkx	0:a259777c45a3	1216	* lcp_reqci - Check the peer's requested CIs and send appropriate response.
dirkx	0:a259777c45a3	1217	*
dirkx	0:a259777c45a3	1218	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
dirkx	0:a259777c45a3	1219	* appropriately. If reject_if_disagree is non-zero, doesn't return
dirkx	0:a259777c45a3	1220	* CONFNAK; returns CONFREJ if it can't return CONFACK.
dirkx	0:a259777c45a3	1221	*/
dirkx	0:a259777c45a3	1222	static int
dirkx	0:a259777c45a3	1223	lcp_reqci(fsm *f,
dirkx	0:a259777c45a3	1224	u_char inp, / Requested CIs */
dirkx	0:a259777c45a3	1225	int lenp, / Length of requested CIs */
dirkx	0:a259777c45a3	1226	int reject_if_disagree)
dirkx	0:a259777c45a3	1227	{
dirkx	0:a259777c45a3	1228	lcp_options *go = &lcp_gotoptions[f->unit];
dirkx	0:a259777c45a3	1229	lcp_options *ho = &lcp_hisoptions[f->unit];
dirkx	0:a259777c45a3	1230	lcp_options *ao = &lcp_allowoptions[f->unit];
dirkx	0:a259777c45a3	1231	u_char cip, next; /* Pointer to current and next CIs */
dirkx	0:a259777c45a3	1232	int cilen, citype; /* Parsed len, type */
dirkx	0:a259777c45a3	1233	u_char cichar; /* Parsed char value */
dirkx	0:a259777c45a3	1234	u_short cishort; /* Parsed short value */
dirkx	0:a259777c45a3	1235	u32_t cilong; /* Parse long value */
dirkx	0:a259777c45a3	1236	int rc = CONFACK; /* Final packet return code */
dirkx	0:a259777c45a3	1237	int orc; /* Individual option return code */
dirkx	0:a259777c45a3	1238	u_char p; / Pointer to next char to parse */
dirkx	0:a259777c45a3	1239	u_char rejp; / Pointer to next char in reject frame */
dirkx	0:a259777c45a3	1240	u_char nakp; / Pointer to next char in Nak frame */
dirkx	0:a259777c45a3	1241	int l = lenp; / Length left */
dirkx	0:a259777c45a3	1242	#if TRACELCP > 0
dirkx	0:a259777c45a3	1243	char traceBuf[80];
dirkx	0:a259777c45a3	1244	size_t traceNdx = 0;
dirkx	0:a259777c45a3	1245	#endif
dirkx	0:a259777c45a3	1246
dirkx	0:a259777c45a3	1247	/*
dirkx	0:a259777c45a3	1248	* Reset all his options.
dirkx	0:a259777c45a3	1249	*/
dirkx	0:a259777c45a3	1250	BZERO(ho, sizeof(*ho));
dirkx	0:a259777c45a3	1251
dirkx	0:a259777c45a3	1252	/*
dirkx	0:a259777c45a3	1253	* Process all his options.
dirkx	0:a259777c45a3	1254	*/
dirkx	0:a259777c45a3	1255	next = inp;
dirkx	0:a259777c45a3	1256	nakp = nak_buffer;
dirkx	0:a259777c45a3	1257	rejp = inp;
dirkx	0:a259777c45a3	1258	while (l) {
dirkx	0:a259777c45a3	1259	orc = CONFACK; /* Assume success */
dirkx	0:a259777c45a3	1260	cip = p = next; /* Remember begining of CI */
dirkx	0:a259777c45a3	1261	if (l < 2 \|\| /* Not enough data for CI header or */
dirkx	0:a259777c45a3	1262	p[1] < 2 \|\| /* CI length too small or */
dirkx	0:a259777c45a3	1263	p[1] > l) { /* CI length too big? */
dirkx	0:a259777c45a3	1264	LCPDEBUG(LOG_WARNING, ("lcp_reqci: bad CI length!\n"));
dirkx	0:a259777c45a3	1265	orc = CONFREJ; /* Reject bad CI */
dirkx	0:a259777c45a3	1266	cilen = l; /* Reject till end of packet */
dirkx	0:a259777c45a3	1267	l = 0; /* Don't loop again */
dirkx	0:a259777c45a3	1268	citype = 0;
dirkx	0:a259777c45a3	1269	goto endswitch;
dirkx	0:a259777c45a3	1270	}
dirkx	0:a259777c45a3	1271	GETCHAR(citype, p); /* Parse CI type */
dirkx	0:a259777c45a3	1272	GETCHAR(cilen, p); /* Parse CI length */
dirkx	0:a259777c45a3	1273	l -= cilen; /* Adjust remaining length */
dirkx	0:a259777c45a3	1274	next += cilen; /* Step to next CI */
dirkx	0:a259777c45a3	1275
dirkx	0:a259777c45a3	1276	switch (citype) { /* Check CI type */
dirkx	0:a259777c45a3	1277	case CI_MRU:
dirkx	0:a259777c45a3	1278	if (!ao->neg_mru) { /* Allow option? */
dirkx	0:a259777c45a3	1279	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - not allowed\n"));
dirkx	0:a259777c45a3	1280	orc = CONFREJ; /* Reject CI */
dirkx	0:a259777c45a3	1281	break;
dirkx	0:a259777c45a3	1282	} else if (cilen != CILEN_SHORT) { /* Check CI length */
dirkx	0:a259777c45a3	1283	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - bad length\n"));
dirkx	0:a259777c45a3	1284	orc = CONFREJ; /* Reject CI */
dirkx	0:a259777c45a3	1285	break;
dirkx	0:a259777c45a3	1286	}
dirkx	0:a259777c45a3	1287	GETSHORT(cishort, p); /* Parse MRU */
dirkx	0:a259777c45a3	1288
dirkx	0:a259777c45a3	1289	/*
dirkx	0:a259777c45a3	1290	* He must be able to receive at least our minimum.
dirkx	0:a259777c45a3	1291	* No need to check a maximum. If he sends a large number,
dirkx	0:a259777c45a3	1292	* we'll just ignore it.
dirkx	0:a259777c45a3	1293	*/
dirkx	0:a259777c45a3	1294	if (cishort < PPP_MINMRU) {
dirkx	0:a259777c45a3	1295	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak - MRU too small\n"));
dirkx	0:a259777c45a3	1296	orc = CONFNAK; /* Nak CI */
dirkx	0:a259777c45a3	1297	PUTCHAR(CI_MRU, nakp);
dirkx	0:a259777c45a3	1298	PUTCHAR(CILEN_SHORT, nakp);
dirkx	0:a259777c45a3	1299	PUTSHORT(PPP_MINMRU, nakp); /* Give him a hint */
dirkx	0:a259777c45a3	1300	break;
dirkx	0:a259777c45a3	1301	}
dirkx	0:a259777c45a3	1302	ho->neg_mru = 1; /* Remember he sent MRU */
dirkx	0:a259777c45a3	1303	ho->mru = cishort; /* And remember value */
dirkx	0:a259777c45a3	1304	#if TRACELCP > 0
dirkx	0:a259777c45a3	1305	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MRU %d", cishort);
dirkx	0:a259777c45a3	1306	traceNdx = strlen(traceBuf);
dirkx	0:a259777c45a3	1307	#endif
dirkx	0:a259777c45a3	1308	break;
dirkx	0:a259777c45a3	1309
dirkx	0:a259777c45a3	1310	case CI_ASYNCMAP:
dirkx	0:a259777c45a3	1311	if (!ao->neg_asyncmap) {
dirkx	0:a259777c45a3	1312	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP not allowed\n"));
dirkx	0:a259777c45a3	1313	orc = CONFREJ;
dirkx	0:a259777c45a3	1314	break;
dirkx	0:a259777c45a3	1315	} else if (cilen != CILEN_LONG) {
dirkx	0:a259777c45a3	1316	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP bad length\n"));
dirkx	0:a259777c45a3	1317	orc = CONFREJ;
dirkx	0:a259777c45a3	1318	break;
dirkx	0:a259777c45a3	1319	}
dirkx	0:a259777c45a3	1320	GETLONG(cilong, p);
dirkx	0:a259777c45a3	1321
dirkx	0:a259777c45a3	1322	/*
dirkx	0:a259777c45a3	1323	* Asyncmap must have set at least the bits
dirkx	0:a259777c45a3	1324	* which are set in lcp_allowoptions[unit].asyncmap.
dirkx	0:a259777c45a3	1325	*/
dirkx	0:a259777c45a3	1326	if ((ao->asyncmap & ~cilong) != 0) {
dirkx	0:a259777c45a3	1327	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak ASYNCMAP %lX missing %lX\n",
dirkx	0:a259777c45a3	1328	cilong, ao->asyncmap));
dirkx	0:a259777c45a3	1329	orc = CONFNAK;
dirkx	0:a259777c45a3	1330	PUTCHAR(CI_ASYNCMAP, nakp);
dirkx	0:a259777c45a3	1331	PUTCHAR(CILEN_LONG, nakp);
dirkx	0:a259777c45a3	1332	PUTLONG(ao->asyncmap \| cilong, nakp);
dirkx	0:a259777c45a3	1333	break;
dirkx	0:a259777c45a3	1334	}
dirkx	0:a259777c45a3	1335	ho->neg_asyncmap = 1;
dirkx	0:a259777c45a3	1336	ho->asyncmap = cilong;
dirkx	0:a259777c45a3	1337	#if TRACELCP > 0
dirkx	0:a259777c45a3	1338	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ASYNCMAP=%lX", cilong);
dirkx	0:a259777c45a3	1339	traceNdx = strlen(traceBuf);
dirkx	0:a259777c45a3	1340	#endif
dirkx	0:a259777c45a3	1341	break;
dirkx	0:a259777c45a3	1342
dirkx	0:a259777c45a3	1343	case CI_AUTHTYPE:
dirkx	0:a259777c45a3	1344	if (cilen < CILEN_SHORT) {
dirkx	0:a259777c45a3	1345	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE missing arg\n"));
dirkx	0:a259777c45a3	1346	orc = CONFREJ;
dirkx	0:a259777c45a3	1347	break;
dirkx	0:a259777c45a3	1348	} else if (!(ao->neg_upap \|\| ao->neg_chap)) {
dirkx	0:a259777c45a3	1349	/*
dirkx	0:a259777c45a3	1350	* Reject the option if we're not willing to authenticate.
dirkx	0:a259777c45a3	1351	*/
dirkx	0:a259777c45a3	1352	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE not allowed\n"));
dirkx	0:a259777c45a3	1353	orc = CONFREJ;
dirkx	0:a259777c45a3	1354	break;
dirkx	0:a259777c45a3	1355	}
dirkx	0:a259777c45a3	1356	GETSHORT(cishort, p);
dirkx	0:a259777c45a3	1357
dirkx	0:a259777c45a3	1358	/*
dirkx	0:a259777c45a3	1359	* Authtype must be UPAP or CHAP.
dirkx	0:a259777c45a3	1360	*
dirkx	0:a259777c45a3	1361	* Note: if both ao->neg_upap and ao->neg_chap are set,
dirkx	0:a259777c45a3	1362	* and the peer sends a Configure-Request with two
dirkx	0:a259777c45a3	1363	* authenticate-protocol requests, one for CHAP and one
dirkx	0:a259777c45a3	1364	* for UPAP, then we will reject the second request.
dirkx	0:a259777c45a3	1365	* Whether we end up doing CHAP or UPAP depends then on
dirkx	0:a259777c45a3	1366	* the ordering of the CIs in the peer's Configure-Request.
dirkx	0:a259777c45a3	1367	*/
dirkx	0:a259777c45a3	1368
dirkx	0:a259777c45a3	1369	if (cishort == PPP_PAP) {
dirkx	0:a259777c45a3	1370	if (ho->neg_chap) { /* we've already accepted CHAP */
dirkx	0:a259777c45a3	1371	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP already accepted\n"));
dirkx	0:a259777c45a3	1372	orc = CONFREJ;
dirkx	0:a259777c45a3	1373	break;
dirkx	0:a259777c45a3	1374	} else if (cilen != CILEN_SHORT) {
dirkx	0:a259777c45a3	1375	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP bad len\n"));
dirkx	0:a259777c45a3	1376	orc = CONFREJ;
dirkx	0:a259777c45a3	1377	break;
dirkx	0:a259777c45a3	1378	}
dirkx	0:a259777c45a3	1379	if (!ao->neg_upap) { /* we don't want to do PAP */
dirkx	0:a259777c45a3	1380	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE PAP not allowed\n"));
dirkx	0:a259777c45a3	1381	orc = CONFNAK; /* NAK it and suggest CHAP */
dirkx	0:a259777c45a3	1382	PUTCHAR(CI_AUTHTYPE, nakp);
dirkx	0:a259777c45a3	1383	PUTCHAR(CILEN_CHAP, nakp);
dirkx	0:a259777c45a3	1384	PUTSHORT(PPP_CHAP, nakp);
dirkx	0:a259777c45a3	1385	PUTCHAR(ao->chap_mdtype, nakp);
dirkx	0:a259777c45a3	1386	break;
dirkx	0:a259777c45a3	1387	}
dirkx	0:a259777c45a3	1388	ho->neg_upap = 1;
dirkx	0:a259777c45a3	1389	#if TRACELCP > 0
dirkx	0:a259777c45a3	1390	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PAP (%X)", cishort);
dirkx	0:a259777c45a3	1391	traceNdx = strlen(traceBuf);
dirkx	0:a259777c45a3	1392	#endif
dirkx	0:a259777c45a3	1393	break;
dirkx	0:a259777c45a3	1394	}
dirkx	0:a259777c45a3	1395	if (cishort == PPP_CHAP) {
dirkx	0:a259777c45a3	1396	if (ho->neg_upap) { /* we've already accepted PAP */
dirkx	0:a259777c45a3	1397	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP accepted PAP\n"));
dirkx	0:a259777c45a3	1398	orc = CONFREJ;
dirkx	0:a259777c45a3	1399	break;
dirkx	0:a259777c45a3	1400	} else if (cilen != CILEN_CHAP) {
dirkx	0:a259777c45a3	1401	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP bad len\n"));
dirkx	0:a259777c45a3	1402	orc = CONFREJ;
dirkx	0:a259777c45a3	1403	break;
dirkx	0:a259777c45a3	1404	}
dirkx	0:a259777c45a3	1405	if (!ao->neg_chap) { /* we don't want to do CHAP */
dirkx	0:a259777c45a3	1406	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP not allowed\n"));
dirkx	0:a259777c45a3	1407	orc = CONFNAK; /* NAK it and suggest PAP */
dirkx	0:a259777c45a3	1408	PUTCHAR(CI_AUTHTYPE, nakp);
dirkx	0:a259777c45a3	1409	PUTCHAR(CILEN_SHORT, nakp);
dirkx	0:a259777c45a3	1410	PUTSHORT(PPP_PAP, nakp);
dirkx	0:a259777c45a3	1411	break;
dirkx	0:a259777c45a3	1412	}
dirkx	0:a259777c45a3	1413	GETCHAR(cichar, p); /* get digest type*/
dirkx	0:a259777c45a3	1414	if (cichar != CHAP_DIGEST_MD5
dirkx	0:a259777c45a3	1415	#if MSCHAP_SUPPORT
dirkx	0:a259777c45a3	1416	&& cichar != CHAP_MICROSOFT
dirkx	0:a259777c45a3	1417	#endif
dirkx	0:a259777c45a3	1418	) {
dirkx	0:a259777c45a3	1419	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP digest=%d\n", (int)cichar));
dirkx	0:a259777c45a3	1420	orc = CONFNAK;
dirkx	0:a259777c45a3	1421	PUTCHAR(CI_AUTHTYPE, nakp);
dirkx	0:a259777c45a3	1422	PUTCHAR(CILEN_CHAP, nakp);
dirkx	0:a259777c45a3	1423	PUTSHORT(PPP_CHAP, nakp);
dirkx	0:a259777c45a3	1424	PUTCHAR(ao->chap_mdtype, nakp);
dirkx	0:a259777c45a3	1425	break;
dirkx	0:a259777c45a3	1426	}
dirkx	0:a259777c45a3	1427	#if TRACELCP > 0
dirkx	0:a259777c45a3	1428	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CHAP %X,%d", cishort, (int)cichar);
dirkx	0:a259777c45a3	1429	traceNdx = strlen(traceBuf);
dirkx	0:a259777c45a3	1430	#endif
dirkx	0:a259777c45a3	1431	ho->chap_mdtype = cichar; /* save md type */
dirkx	0:a259777c45a3	1432	ho->neg_chap = 1;
dirkx	0:a259777c45a3	1433	break;
dirkx	0:a259777c45a3	1434	}
dirkx	0:a259777c45a3	1435
dirkx	0:a259777c45a3	1436	/*
dirkx	0:a259777c45a3	1437	* We don't recognize the protocol they're asking for.
dirkx	0:a259777c45a3	1438	* Nak it with something we're willing to do.
dirkx	0:a259777c45a3	1439	* (At this point we know ao->neg_upap \|\| ao->neg_chap.)
dirkx	0:a259777c45a3	1440	*/
dirkx	0:a259777c45a3	1441	orc = CONFNAK;
dirkx	0:a259777c45a3	1442	PUTCHAR(CI_AUTHTYPE, nakp);
dirkx	0:a259777c45a3	1443	if (ao->neg_chap) {
dirkx	0:a259777c45a3	1444	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req CHAP\n", cishort));
dirkx	0:a259777c45a3	1445	PUTCHAR(CILEN_CHAP, nakp);
dirkx	0:a259777c45a3	1446	PUTSHORT(PPP_CHAP, nakp);
dirkx	0:a259777c45a3	1447	PUTCHAR(ao->chap_mdtype, nakp);
dirkx	0:a259777c45a3	1448	} else {
dirkx	0:a259777c45a3	1449	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req PAP\n", cishort));
dirkx	0:a259777c45a3	1450	PUTCHAR(CILEN_SHORT, nakp);
dirkx	0:a259777c45a3	1451	PUTSHORT(PPP_PAP, nakp);
dirkx	0:a259777c45a3	1452	}
dirkx	0:a259777c45a3	1453	break;
dirkx	0:a259777c45a3	1454
dirkx	0:a259777c45a3	1455	case CI_QUALITY:
dirkx	0:a259777c45a3	1456	GETSHORT(cishort, p);
dirkx	0:a259777c45a3	1457	GETLONG(cilong, p);
dirkx	0:a259777c45a3	1458	#if TRACELCP > 0
dirkx	0:a259777c45a3	1459	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " QUALITY (%x %x)", cishort, (unsigned int) cilong);
dirkx	0:a259777c45a3	1460	traceNdx = strlen(traceBuf);
dirkx	0:a259777c45a3	1461	#endif
dirkx	0:a259777c45a3	1462
dirkx	0:a259777c45a3	1463	if (!ao->neg_lqr \|\|
dirkx	0:a259777c45a3	1464	cilen != CILEN_LQR) {
dirkx	0:a259777c45a3	1465	orc = CONFREJ;
dirkx	0:a259777c45a3	1466	break;
dirkx	0:a259777c45a3	1467	}
dirkx	0:a259777c45a3	1468
dirkx	0:a259777c45a3	1469	/*
dirkx	0:a259777c45a3	1470	* Check the protocol and the reporting period.
dirkx	0:a259777c45a3	1471	* XXX When should we Nak this, and what with?
dirkx	0:a259777c45a3	1472	*/
dirkx	0:a259777c45a3	1473	if (cishort != PPP_LQR) {
dirkx	0:a259777c45a3	1474	orc = CONFNAK;
dirkx	0:a259777c45a3	1475	PUTCHAR(CI_QUALITY, nakp);
dirkx	0:a259777c45a3	1476	PUTCHAR(CILEN_LQR, nakp);
dirkx	0:a259777c45a3	1477	PUTSHORT(PPP_LQR, nakp);
dirkx	0:a259777c45a3	1478	PUTLONG(ao->lqr_period, nakp);
dirkx	0:a259777c45a3	1479	break;
dirkx	0:a259777c45a3	1480	}
dirkx	0:a259777c45a3	1481	break;
dirkx	0:a259777c45a3	1482
dirkx	0:a259777c45a3	1483	case CI_MAGICNUMBER:
dirkx	0:a259777c45a3	1484	if (!(ao->neg_magicnumber \|\| go->neg_magicnumber) \|\|
dirkx	0:a259777c45a3	1485	cilen != CILEN_LONG) {
dirkx	0:a259777c45a3	1486	orc = CONFREJ;
dirkx	0:a259777c45a3	1487	break;
dirkx	0:a259777c45a3	1488	}
dirkx	0:a259777c45a3	1489	GETLONG(cilong, p);
dirkx	0:a259777c45a3	1490	#if TRACELCP > 0
dirkx	0:a259777c45a3	1491	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MAGICNUMBER (%lX)", cilong);
dirkx	0:a259777c45a3	1492	traceNdx = strlen(traceBuf);
dirkx	0:a259777c45a3	1493	#endif
dirkx	0:a259777c45a3	1494
dirkx	0:a259777c45a3	1495	/*
dirkx	0:a259777c45a3	1496	* He must have a different magic number.
dirkx	0:a259777c45a3	1497	*/
dirkx	0:a259777c45a3	1498	if (go->neg_magicnumber &&
dirkx	0:a259777c45a3	1499	cilong == go->magicnumber) {
dirkx	0:a259777c45a3	1500	cilong = magic(); /* Don't put magic() inside macro! */
dirkx	0:a259777c45a3	1501	orc = CONFNAK;
dirkx	0:a259777c45a3	1502	PUTCHAR(CI_MAGICNUMBER, nakp);
dirkx	0:a259777c45a3	1503	PUTCHAR(CILEN_LONG, nakp);
dirkx	0:a259777c45a3	1504	PUTLONG(cilong, nakp);
dirkx	0:a259777c45a3	1505	break;
dirkx	0:a259777c45a3	1506	}
dirkx	0:a259777c45a3	1507	ho->neg_magicnumber = 1;
dirkx	0:a259777c45a3	1508	ho->magicnumber = cilong;
dirkx	0:a259777c45a3	1509	break;
dirkx	0:a259777c45a3	1510
dirkx	0:a259777c45a3	1511
dirkx	0:a259777c45a3	1512	case CI_PCOMPRESSION:
dirkx	0:a259777c45a3	1513	#if TRACELCP > 0
dirkx	0:a259777c45a3	1514	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PCOMPRESSION");
dirkx	0:a259777c45a3	1515	traceNdx = strlen(traceBuf);
dirkx	0:a259777c45a3	1516	#endif
dirkx	0:a259777c45a3	1517	if (!ao->neg_pcompression \|\|
dirkx	0:a259777c45a3	1518	cilen != CILEN_VOID) {
dirkx	0:a259777c45a3	1519	orc = CONFREJ;
dirkx	0:a259777c45a3	1520	break;
dirkx	0:a259777c45a3	1521	}
dirkx	0:a259777c45a3	1522	ho->neg_pcompression = 1;
dirkx	0:a259777c45a3	1523	break;
dirkx	0:a259777c45a3	1524
dirkx	0:a259777c45a3	1525	case CI_ACCOMPRESSION:
dirkx	0:a259777c45a3	1526	#if TRACELCP > 0
dirkx	0:a259777c45a3	1527	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ACCOMPRESSION");
dirkx	0:a259777c45a3	1528	traceNdx = strlen(traceBuf);
dirkx	0:a259777c45a3	1529	#endif
dirkx	0:a259777c45a3	1530	if (!ao->neg_accompression \|\|
dirkx	0:a259777c45a3	1531	cilen != CILEN_VOID) {
dirkx	0:a259777c45a3	1532	orc = CONFREJ;
dirkx	0:a259777c45a3	1533	break;
dirkx	0:a259777c45a3	1534	}
dirkx	0:a259777c45a3	1535	ho->neg_accompression = 1;
dirkx	0:a259777c45a3	1536	break;
dirkx	0:a259777c45a3	1537
dirkx	0:a259777c45a3	1538	case CI_MRRU:
dirkx	0:a259777c45a3	1539	#if TRACELCP > 0
dirkx	0:a259777c45a3	1540	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_MRRU");
dirkx	0:a259777c45a3	1541	traceNdx = strlen(traceBuf);
dirkx	0:a259777c45a3	1542	#endif
dirkx	0:a259777c45a3	1543	orc = CONFREJ;
dirkx	0:a259777c45a3	1544	break;
dirkx	0:a259777c45a3	1545
dirkx	0:a259777c45a3	1546	case CI_SSNHF:
dirkx	0:a259777c45a3	1547	#if TRACELCP > 0
dirkx	0:a259777c45a3	1548	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_SSNHF");
dirkx	0:a259777c45a3	1549	traceNdx = strlen(traceBuf);
dirkx	0:a259777c45a3	1550	#endif
dirkx	0:a259777c45a3	1551	orc = CONFREJ;
dirkx	0:a259777c45a3	1552	break;
dirkx	0:a259777c45a3	1553
dirkx	0:a259777c45a3	1554	case CI_EPDISC:
dirkx	0:a259777c45a3	1555	#if TRACELCP > 0
dirkx	0:a259777c45a3	1556	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_EPDISC");
dirkx	0:a259777c45a3	1557	traceNdx = strlen(traceBuf);
dirkx	0:a259777c45a3	1558	#endif
dirkx	0:a259777c45a3	1559	orc = CONFREJ;
dirkx	0:a259777c45a3	1560	break;
dirkx	0:a259777c45a3	1561
dirkx	0:a259777c45a3	1562	default:
dirkx	0:a259777c45a3	1563	#if TRACELCP
dirkx	0:a259777c45a3	1564	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " unknown %d", citype);
dirkx	0:a259777c45a3	1565	traceNdx = strlen(traceBuf);
dirkx	0:a259777c45a3	1566	#endif
dirkx	0:a259777c45a3	1567	orc = CONFREJ;
dirkx	0:a259777c45a3	1568	break;
dirkx	0:a259777c45a3	1569	}
dirkx	0:a259777c45a3	1570
dirkx	0:a259777c45a3	1571	endswitch:
dirkx	0:a259777c45a3	1572	#if TRACELCP
dirkx	0:a259777c45a3	1573	if (traceNdx >= 80 - 32) {
dirkx	0:a259777c45a3	1574	LCPDEBUG(LOG_INFO, ("lcp_reqci: rcvd%s\n", traceBuf));
dirkx	0:a259777c45a3	1575	traceNdx = 0;
dirkx	0:a259777c45a3	1576	}
dirkx	0:a259777c45a3	1577	#endif
dirkx	0:a259777c45a3	1578	if (orc == CONFACK && /* Good CI */
dirkx	0:a259777c45a3	1579	rc != CONFACK) { /* but prior CI wasnt? */
dirkx	0:a259777c45a3	1580	continue; /* Don't send this one */
dirkx	0:a259777c45a3	1581	}
dirkx	0:a259777c45a3	1582
dirkx	0:a259777c45a3	1583	if (orc == CONFNAK) { /* Nak this CI? */
dirkx	0:a259777c45a3	1584	if (reject_if_disagree /* Getting fed up with sending NAKs? */
dirkx	0:a259777c45a3	1585	&& citype != CI_MAGICNUMBER) {
dirkx	0:a259777c45a3	1586	orc = CONFREJ; /* Get tough if so */
dirkx	0:a259777c45a3	1587	} else {
dirkx	0:a259777c45a3	1588	if (rc == CONFREJ) { /* Rejecting prior CI? */
dirkx	0:a259777c45a3	1589	continue; /* Don't send this one */
dirkx	0:a259777c45a3	1590	}
dirkx	0:a259777c45a3	1591	rc = CONFNAK;
dirkx	0:a259777c45a3	1592	}
dirkx	0:a259777c45a3	1593	}
dirkx	0:a259777c45a3	1594	if (orc == CONFREJ) { /* Reject this CI */
dirkx	0:a259777c45a3	1595	rc = CONFREJ;
dirkx	0:a259777c45a3	1596	if (cip != rejp) { /* Need to move rejected CI? */
dirkx	0:a259777c45a3	1597	BCOPY(cip, rejp, cilen); /* Move it */
dirkx	0:a259777c45a3	1598	}
dirkx	0:a259777c45a3	1599	INCPTR(cilen, rejp); /* Update output pointer */
dirkx	0:a259777c45a3	1600	}
dirkx	0:a259777c45a3	1601	}
dirkx	0:a259777c45a3	1602
dirkx	0:a259777c45a3	1603	/*
dirkx	0:a259777c45a3	1604	* If we wanted to send additional NAKs (for unsent CIs), the
dirkx	0:a259777c45a3	1605	* code would go here. The extra NAKs would go at *nakp.
dirkx	0:a259777c45a3	1606	* At present there are no cases where we want to ask the
dirkx	0:a259777c45a3	1607	* peer to negotiate an option.
dirkx	0:a259777c45a3	1608	*/
dirkx	0:a259777c45a3	1609
dirkx	0:a259777c45a3	1610	switch (rc) {
dirkx	0:a259777c45a3	1611	case CONFACK:
dirkx	0:a259777c45a3	1612	*lenp = (int)(next - inp);
dirkx	0:a259777c45a3	1613	break;
dirkx	0:a259777c45a3	1614	case CONFNAK:
dirkx	0:a259777c45a3	1615	/*
dirkx	0:a259777c45a3	1616	* Copy the Nak'd options from the nak_buffer to the caller's buffer.
dirkx	0:a259777c45a3	1617	*/
dirkx	0:a259777c45a3	1618	*lenp = (int)(nakp - nak_buffer);
dirkx	0:a259777c45a3	1619	BCOPY(nak_buffer, inp, *lenp);
dirkx	0:a259777c45a3	1620	break;
dirkx	0:a259777c45a3	1621	case CONFREJ:
dirkx	0:a259777c45a3	1622	*lenp = (int)(rejp - inp);
dirkx	0:a259777c45a3	1623	break;
dirkx	0:a259777c45a3	1624	}
dirkx	0:a259777c45a3	1625
dirkx	0:a259777c45a3	1626	#if TRACELCP > 0
dirkx	0:a259777c45a3	1627	if (traceNdx > 0) {
dirkx	0:a259777c45a3	1628	LCPDEBUG(LOG_INFO, ("lcp_reqci: %s\n", traceBuf));
dirkx	0:a259777c45a3	1629	}
dirkx	0:a259777c45a3	1630	#endif
dirkx	0:a259777c45a3	1631	LCPDEBUG(LOG_INFO, ("lcp_reqci: returning CONF%s.\n", CODENAME(rc)));
dirkx	0:a259777c45a3	1632	return (rc); /* Return final code */
dirkx	0:a259777c45a3	1633	}
dirkx	0:a259777c45a3	1634
dirkx	0:a259777c45a3	1635
dirkx	0:a259777c45a3	1636	/*
dirkx	0:a259777c45a3	1637	* lcp_up - LCP has come UP.
dirkx	0:a259777c45a3	1638	*/
dirkx	0:a259777c45a3	1639	static void
dirkx	0:a259777c45a3	1640	lcp_up(fsm *f)
dirkx	0:a259777c45a3	1641	{
dirkx	0:a259777c45a3	1642	lcp_options *wo = &lcp_wantoptions[f->unit];
dirkx	0:a259777c45a3	1643	lcp_options *ho = &lcp_hisoptions[f->unit];
dirkx	0:a259777c45a3	1644	lcp_options *go = &lcp_gotoptions[f->unit];
dirkx	0:a259777c45a3	1645	lcp_options *ao = &lcp_allowoptions[f->unit];
dirkx	0:a259777c45a3	1646
dirkx	0:a259777c45a3	1647	if (!go->neg_magicnumber) {
dirkx	0:a259777c45a3	1648	go->magicnumber = 0;
dirkx	0:a259777c45a3	1649	}
dirkx	0:a259777c45a3	1650	if (!ho->neg_magicnumber) {
dirkx	0:a259777c45a3	1651	ho->magicnumber = 0;
dirkx	0:a259777c45a3	1652	}
dirkx	0:a259777c45a3	1653
dirkx	0:a259777c45a3	1654	/*
dirkx	0:a259777c45a3	1655	* Set our MTU to the smaller of the MTU we wanted and
dirkx	0:a259777c45a3	1656	* the MRU our peer wanted. If we negotiated an MRU,
dirkx	0:a259777c45a3	1657	* set our MRU to the larger of value we wanted and
dirkx	0:a259777c45a3	1658	* the value we got in the negotiation.
dirkx	0:a259777c45a3	1659	*/
dirkx	0:a259777c45a3	1660	ppp_send_config(f->unit, LWIP_MIN(ao->mru, (ho->neg_mru? ho->mru: PPP_MRU)),
dirkx	0:a259777c45a3	1661	(ho->neg_asyncmap? ho->asyncmap: 0xffffffffl),
dirkx	0:a259777c45a3	1662	ho->neg_pcompression, ho->neg_accompression);
dirkx	0:a259777c45a3	1663	/*
dirkx	0:a259777c45a3	1664	* If the asyncmap hasn't been negotiated, we really should
dirkx	0:a259777c45a3	1665	* set the receive asyncmap to ffffffff, but we set it to 0
dirkx	0:a259777c45a3	1666	* for backwards contemptibility.
dirkx	0:a259777c45a3	1667	*/
dirkx	0:a259777c45a3	1668	ppp_recv_config(f->unit, (go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU),
dirkx	0:a259777c45a3	1669	(go->neg_asyncmap? go->asyncmap: 0x00000000),
dirkx	0:a259777c45a3	1670	go->neg_pcompression, go->neg_accompression);
dirkx	0:a259777c45a3	1671
dirkx	0:a259777c45a3	1672	if (ho->neg_mru) {
dirkx	0:a259777c45a3	1673	peer_mru[f->unit] = ho->mru;
dirkx	0:a259777c45a3	1674	}
dirkx	0:a259777c45a3	1675
dirkx	0:a259777c45a3	1676	lcp_echo_lowerup(f->unit); /* Enable echo messages */
dirkx	0:a259777c45a3	1677
dirkx	0:a259777c45a3	1678	link_established(f->unit); /* The link is up; authenticate now */
dirkx	0:a259777c45a3	1679	}
dirkx	0:a259777c45a3	1680
dirkx	0:a259777c45a3	1681
dirkx	0:a259777c45a3	1682	/*
dirkx	0:a259777c45a3	1683	* lcp_down - LCP has gone DOWN.
dirkx	0:a259777c45a3	1684	*
dirkx	0:a259777c45a3	1685	* Alert other protocols.
dirkx	0:a259777c45a3	1686	*/
dirkx	0:a259777c45a3	1687	static void
dirkx	0:a259777c45a3	1688	lcp_down(fsm *f)
dirkx	0:a259777c45a3	1689	{
dirkx	0:a259777c45a3	1690	lcp_options *go = &lcp_gotoptions[f->unit];
dirkx	0:a259777c45a3	1691
dirkx	0:a259777c45a3	1692	lcp_echo_lowerdown(f->unit);
dirkx	0:a259777c45a3	1693
dirkx	0:a259777c45a3	1694	link_down(f->unit);
dirkx	0:a259777c45a3	1695
dirkx	0:a259777c45a3	1696	ppp_send_config(f->unit, PPP_MRU, 0xffffffffl, 0, 0);
dirkx	0:a259777c45a3	1697	ppp_recv_config(f->unit, PPP_MRU,
dirkx	0:a259777c45a3	1698	(go->neg_asyncmap? go->asyncmap: 0x00000000),
dirkx	0:a259777c45a3	1699	go->neg_pcompression, go->neg_accompression);
dirkx	0:a259777c45a3	1700	peer_mru[f->unit] = PPP_MRU;
dirkx	0:a259777c45a3	1701	}
dirkx	0:a259777c45a3	1702
dirkx	0:a259777c45a3	1703
dirkx	0:a259777c45a3	1704	/*
dirkx	0:a259777c45a3	1705	* lcp_starting - LCP needs the lower layer up.
dirkx	0:a259777c45a3	1706	*/
dirkx	0:a259777c45a3	1707	static void
dirkx	0:a259777c45a3	1708	lcp_starting(fsm *f)
dirkx	0:a259777c45a3	1709	{
dirkx	0:a259777c45a3	1710	link_required(f->unit); /* lwip: currently does nothing */
dirkx	0:a259777c45a3	1711	}
dirkx	0:a259777c45a3	1712
dirkx	0:a259777c45a3	1713
dirkx	0:a259777c45a3	1714	/*
dirkx	0:a259777c45a3	1715	* lcp_finished - LCP has finished with the lower layer.
dirkx	0:a259777c45a3	1716	*/
dirkx	0:a259777c45a3	1717	static void
dirkx	0:a259777c45a3	1718	lcp_finished(fsm *f)
dirkx	0:a259777c45a3	1719	{
dirkx	0:a259777c45a3	1720	link_terminated(f->unit); /* we are finished with the link */
dirkx	0:a259777c45a3	1721	}
dirkx	0:a259777c45a3	1722
dirkx	0:a259777c45a3	1723
dirkx	0:a259777c45a3	1724	#if PPP_ADDITIONAL_CALLBACKS
dirkx	0:a259777c45a3	1725	/*
dirkx	0:a259777c45a3	1726	* print_string - print a readable representation of a string using
dirkx	0:a259777c45a3	1727	* printer.
dirkx	0:a259777c45a3	1728	*/
dirkx	0:a259777c45a3	1729	static void
dirkx	0:a259777c45a3	1730	print_string( char p, int len, void (printer) (void , char , ...), void *arg)
dirkx	0:a259777c45a3	1731	{
dirkx	0:a259777c45a3	1732	int c;
dirkx	0:a259777c45a3	1733
dirkx	0:a259777c45a3	1734	printer(arg, "\"");
dirkx	0:a259777c45a3	1735	for (; len > 0; --len) {
dirkx	0:a259777c45a3	1736	c = *p++;
dirkx	0:a259777c45a3	1737	if (' ' <= c && c <= '~') {
dirkx	0:a259777c45a3	1738	if (c == '\\' \|\| c == '"') {
dirkx	0:a259777c45a3	1739	printer(arg, "\\");
dirkx	0:a259777c45a3	1740	}
dirkx	0:a259777c45a3	1741	printer(arg, "%c", c);
dirkx	0:a259777c45a3	1742	} else {
dirkx	0:a259777c45a3	1743	switch (c) {
dirkx	0:a259777c45a3	1744	case '\n':
dirkx	0:a259777c45a3	1745	printer(arg, "\\n");
dirkx	0:a259777c45a3	1746	break;
dirkx	0:a259777c45a3	1747	case '\r':
dirkx	0:a259777c45a3	1748	printer(arg, "\\r");
dirkx	0:a259777c45a3	1749	break;
dirkx	0:a259777c45a3	1750	case '\t':
dirkx	0:a259777c45a3	1751	printer(arg, "\\t");
dirkx	0:a259777c45a3	1752	break;
dirkx	0:a259777c45a3	1753	default:
dirkx	0:a259777c45a3	1754	printer(arg, "\\%.3o", c);
dirkx	0:a259777c45a3	1755	}
dirkx	0:a259777c45a3	1756	}
dirkx	0:a259777c45a3	1757	}
dirkx	0:a259777c45a3	1758	printer(arg, "\"");
dirkx	0:a259777c45a3	1759	}
dirkx	0:a259777c45a3	1760
dirkx	0:a259777c45a3	1761
dirkx	0:a259777c45a3	1762	/*
dirkx	0:a259777c45a3	1763	* lcp_printpkt - print the contents of an LCP packet.
dirkx	0:a259777c45a3	1764	*/
dirkx	0:a259777c45a3	1765	static char *lcp_codenames[] = {
dirkx	0:a259777c45a3	1766	"ConfReq", "ConfAck", "ConfNak", "ConfRej",
dirkx	0:a259777c45a3	1767	"TermReq", "TermAck", "CodeRej", "ProtRej",
dirkx	0:a259777c45a3	1768	"EchoReq", "EchoRep", "DiscReq"
dirkx	0:a259777c45a3	1769	};
dirkx	0:a259777c45a3	1770
dirkx	0:a259777c45a3	1771	static int
dirkx	0:a259777c45a3	1772	lcp_printpkt( u_char p, int plen, void (printer) (void , char , ...), void *arg)
dirkx	0:a259777c45a3	1773	{
dirkx	0:a259777c45a3	1774	int code, id, len, olen;
dirkx	0:a259777c45a3	1775	u_char pstart, optend;
dirkx	0:a259777c45a3	1776	u_short cishort;
dirkx	0:a259777c45a3	1777	u32_t cilong;
dirkx	0:a259777c45a3	1778
dirkx	0:a259777c45a3	1779	if (plen < HEADERLEN) {
dirkx	0:a259777c45a3	1780	return 0;
dirkx	0:a259777c45a3	1781	}
dirkx	0:a259777c45a3	1782	pstart = p;
dirkx	0:a259777c45a3	1783	GETCHAR(code, p);
dirkx	0:a259777c45a3	1784	GETCHAR(id, p);
dirkx	0:a259777c45a3	1785	GETSHORT(len, p);
dirkx	0:a259777c45a3	1786	if (len < HEADERLEN \|\| len > plen) {
dirkx	0:a259777c45a3	1787	return 0;
dirkx	0:a259777c45a3	1788	}
dirkx	0:a259777c45a3	1789
dirkx	0:a259777c45a3	1790	if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *)) {
dirkx	0:a259777c45a3	1791	printer(arg, " %s", lcp_codenames[code-1]);
dirkx	0:a259777c45a3	1792	} else {
dirkx	0:a259777c45a3	1793	printer(arg, " code=0x%x", code);
dirkx	0:a259777c45a3	1794	}
dirkx	0:a259777c45a3	1795	printer(arg, " id=0x%x", id);
dirkx	0:a259777c45a3	1796	len -= HEADERLEN;
dirkx	0:a259777c45a3	1797	switch (code) {
dirkx	0:a259777c45a3	1798	case CONFREQ:
dirkx	0:a259777c45a3	1799	case CONFACK:
dirkx	0:a259777c45a3	1800	case CONFNAK:
dirkx	0:a259777c45a3	1801	case CONFREJ:
dirkx	0:a259777c45a3	1802	/* print option list */
dirkx	0:a259777c45a3	1803	while (len >= 2) {
dirkx	0:a259777c45a3	1804	GETCHAR(code, p);
dirkx	0:a259777c45a3	1805	GETCHAR(olen, p);
dirkx	0:a259777c45a3	1806	p -= 2;
dirkx	0:a259777c45a3	1807	if (olen < 2 \|\| olen > len) {
dirkx	0:a259777c45a3	1808	break;
dirkx	0:a259777c45a3	1809	}
dirkx	0:a259777c45a3	1810	printer(arg, " <");
dirkx	0:a259777c45a3	1811	len -= olen;
dirkx	0:a259777c45a3	1812	optend = p + olen;
dirkx	0:a259777c45a3	1813	switch (code) {
dirkx	0:a259777c45a3	1814	case CI_MRU:
dirkx	0:a259777c45a3	1815	if (olen == CILEN_SHORT) {
dirkx	0:a259777c45a3	1816	p += 2;
dirkx	0:a259777c45a3	1817	GETSHORT(cishort, p);
dirkx	0:a259777c45a3	1818	printer(arg, "mru %d", cishort);
dirkx	0:a259777c45a3	1819	}
dirkx	0:a259777c45a3	1820	break;
dirkx	0:a259777c45a3	1821	case CI_ASYNCMAP:
dirkx	0:a259777c45a3	1822	if (olen == CILEN_LONG) {
dirkx	0:a259777c45a3	1823	p += 2;
dirkx	0:a259777c45a3	1824	GETLONG(cilong, p);
dirkx	0:a259777c45a3	1825	printer(arg, "asyncmap 0x%lx", cilong);
dirkx	0:a259777c45a3	1826	}
dirkx	0:a259777c45a3	1827	break;
dirkx	0:a259777c45a3	1828	case CI_AUTHTYPE:
dirkx	0:a259777c45a3	1829	if (olen >= CILEN_SHORT) {
dirkx	0:a259777c45a3	1830	p += 2;
dirkx	0:a259777c45a3	1831	printer(arg, "auth ");
dirkx	0:a259777c45a3	1832	GETSHORT(cishort, p);
dirkx	0:a259777c45a3	1833	switch (cishort) {
dirkx	0:a259777c45a3	1834	case PPP_PAP:
dirkx	0:a259777c45a3	1835	printer(arg, "pap");
dirkx	0:a259777c45a3	1836	break;
dirkx	0:a259777c45a3	1837	case PPP_CHAP:
dirkx	0:a259777c45a3	1838	printer(arg, "chap");
dirkx	0:a259777c45a3	1839	break;
dirkx	0:a259777c45a3	1840	default:
dirkx	0:a259777c45a3	1841	printer(arg, "0x%x", cishort);
dirkx	0:a259777c45a3	1842	}
dirkx	0:a259777c45a3	1843	}
dirkx	0:a259777c45a3	1844	break;
dirkx	0:a259777c45a3	1845	case CI_QUALITY:
dirkx	0:a259777c45a3	1846	if (olen >= CILEN_SHORT) {
dirkx	0:a259777c45a3	1847	p += 2;
dirkx	0:a259777c45a3	1848	printer(arg, "quality ");
dirkx	0:a259777c45a3	1849	GETSHORT(cishort, p);
dirkx	0:a259777c45a3	1850	switch (cishort) {
dirkx	0:a259777c45a3	1851	case PPP_LQR:
dirkx	0:a259777c45a3	1852	printer(arg, "lqr");
dirkx	0:a259777c45a3	1853	break;
dirkx	0:a259777c45a3	1854	default:
dirkx	0:a259777c45a3	1855	printer(arg, "0x%x", cishort);
dirkx	0:a259777c45a3	1856	}
dirkx	0:a259777c45a3	1857	}
dirkx	0:a259777c45a3	1858	break;
dirkx	0:a259777c45a3	1859	case CI_CALLBACK:
dirkx	0:a259777c45a3	1860	if (olen >= CILEN_CHAR) {
dirkx	0:a259777c45a3	1861	p += 2;
dirkx	0:a259777c45a3	1862	printer(arg, "callback ");
dirkx	0:a259777c45a3	1863	GETSHORT(cishort, p);
dirkx	0:a259777c45a3	1864	switch (cishort) {
dirkx	0:a259777c45a3	1865	case CBCP_OPT:
dirkx	0:a259777c45a3	1866	printer(arg, "CBCP");
dirkx	0:a259777c45a3	1867	break;
dirkx	0:a259777c45a3	1868	default:
dirkx	0:a259777c45a3	1869	printer(arg, "0x%x", cishort);
dirkx	0:a259777c45a3	1870	}
dirkx	0:a259777c45a3	1871	}
dirkx	0:a259777c45a3	1872	break;
dirkx	0:a259777c45a3	1873	case CI_MAGICNUMBER:
dirkx	0:a259777c45a3	1874	if (olen == CILEN_LONG) {
dirkx	0:a259777c45a3	1875	p += 2;
dirkx	0:a259777c45a3	1876	GETLONG(cilong, p);
dirkx	0:a259777c45a3	1877	printer(arg, "magic 0x%x", cilong);
dirkx	0:a259777c45a3	1878	}
dirkx	0:a259777c45a3	1879	break;
dirkx	0:a259777c45a3	1880	case CI_PCOMPRESSION:
dirkx	0:a259777c45a3	1881	if (olen == CILEN_VOID) {
dirkx	0:a259777c45a3	1882	p += 2;
dirkx	0:a259777c45a3	1883	printer(arg, "pcomp");
dirkx	0:a259777c45a3	1884	}
dirkx	0:a259777c45a3	1885	break;
dirkx	0:a259777c45a3	1886	case CI_ACCOMPRESSION:
dirkx	0:a259777c45a3	1887	if (olen == CILEN_VOID) {
dirkx	0:a259777c45a3	1888	p += 2;
dirkx	0:a259777c45a3	1889	printer(arg, "accomp");
dirkx	0:a259777c45a3	1890	}
dirkx	0:a259777c45a3	1891	break;
dirkx	0:a259777c45a3	1892	}
dirkx	0:a259777c45a3	1893	while (p < optend) {
dirkx	0:a259777c45a3	1894	GETCHAR(code, p);
dirkx	0:a259777c45a3	1895	printer(arg, " %.2x", code);
dirkx	0:a259777c45a3	1896	}
dirkx	0:a259777c45a3	1897	printer(arg, ">");
dirkx	0:a259777c45a3	1898	}
dirkx	0:a259777c45a3	1899	break;
dirkx	0:a259777c45a3	1900
dirkx	0:a259777c45a3	1901	case TERMACK:
dirkx	0:a259777c45a3	1902	case TERMREQ:
dirkx	0:a259777c45a3	1903	if (len > 0 && p >= ' ' && p < 0x7f) {
dirkx	0:a259777c45a3	1904	printer(arg, " ");
dirkx	0:a259777c45a3	1905	print_string((char*)p, len, printer, arg);
dirkx	0:a259777c45a3	1906	p += len;
dirkx	0:a259777c45a3	1907	len = 0;
dirkx	0:a259777c45a3	1908	}
dirkx	0:a259777c45a3	1909	break;
dirkx	0:a259777c45a3	1910
dirkx	0:a259777c45a3	1911	case ECHOREQ:
dirkx	0:a259777c45a3	1912	case ECHOREP:
dirkx	0:a259777c45a3	1913	case DISCREQ:
dirkx	0:a259777c45a3	1914	if (len >= 4) {
dirkx	0:a259777c45a3	1915	GETLONG(cilong, p);
dirkx	0:a259777c45a3	1916	printer(arg, " magic=0x%x", cilong);
dirkx	0:a259777c45a3	1917	p += 4;
dirkx	0:a259777c45a3	1918	len -= 4;
dirkx	0:a259777c45a3	1919	}
dirkx	0:a259777c45a3	1920	break;
dirkx	0:a259777c45a3	1921	}
dirkx	0:a259777c45a3	1922
dirkx	0:a259777c45a3	1923	/* print the rest of the bytes in the packet */
dirkx	0:a259777c45a3	1924	for (; len > 0; --len) {
dirkx	0:a259777c45a3	1925	GETCHAR(code, p);
dirkx	0:a259777c45a3	1926	printer(arg, " %.2x", code);
dirkx	0:a259777c45a3	1927	}
dirkx	0:a259777c45a3	1928
dirkx	0:a259777c45a3	1929	return (int)(p - pstart);
dirkx	0:a259777c45a3	1930	}
dirkx	0:a259777c45a3	1931	#endif /* PPP_ADDITIONAL_CALLBACKS */
dirkx	0:a259777c45a3	1932
dirkx	0:a259777c45a3	1933	/*
dirkx	0:a259777c45a3	1934	* Time to shut down the link because there is nothing out there.
dirkx	0:a259777c45a3	1935	*/
dirkx	0:a259777c45a3	1936	static void
dirkx	0:a259777c45a3	1937	LcpLinkFailure (fsm *f)
dirkx	0:a259777c45a3	1938	{
dirkx	0:a259777c45a3	1939	if (f->state == LS_OPENED) {
dirkx	0:a259777c45a3	1940	LCPDEBUG(LOG_INFO, ("No response to %d echo-requests\n", lcp_echos_pending));
dirkx	0:a259777c45a3	1941	LCPDEBUG(LOG_NOTICE, ("Serial link appears to be disconnected.\n"));
dirkx	0:a259777c45a3	1942	lcp_close(f->unit, "Peer not responding");
dirkx	0:a259777c45a3	1943	}
dirkx	0:a259777c45a3	1944	}
dirkx	0:a259777c45a3	1945
dirkx	0:a259777c45a3	1946	/*
dirkx	0:a259777c45a3	1947	* Timer expired for the LCP echo requests from this process.
dirkx	0:a259777c45a3	1948	*/
dirkx	0:a259777c45a3	1949	static void
dirkx	0:a259777c45a3	1950	LcpEchoCheck (fsm *f)
dirkx	0:a259777c45a3	1951	{
dirkx	0:a259777c45a3	1952	LcpSendEchoRequest (f);
dirkx	0:a259777c45a3	1953
dirkx	0:a259777c45a3	1954	/*
dirkx	0:a259777c45a3	1955	* Start the timer for the next interval.
dirkx	0:a259777c45a3	1956	*/
dirkx	0:a259777c45a3	1957	LWIP_ASSERT("lcp_echo_timer_running == 0", lcp_echo_timer_running == 0);
dirkx	0:a259777c45a3	1958
dirkx	0:a259777c45a3	1959	TIMEOUT (LcpEchoTimeout, f, lcp_echo_interval);
dirkx	0:a259777c45a3	1960	lcp_echo_timer_running = 1;
dirkx	0:a259777c45a3	1961	}
dirkx	0:a259777c45a3	1962
dirkx	0:a259777c45a3	1963	/*
dirkx	0:a259777c45a3	1964	* LcpEchoTimeout - Timer expired on the LCP echo
dirkx	0:a259777c45a3	1965	*/
dirkx	0:a259777c45a3	1966	static void
dirkx	0:a259777c45a3	1967	LcpEchoTimeout (void *arg)
dirkx	0:a259777c45a3	1968	{
dirkx	0:a259777c45a3	1969	if (lcp_echo_timer_running != 0) {
dirkx	0:a259777c45a3	1970	lcp_echo_timer_running = 0;
dirkx	0:a259777c45a3	1971	LcpEchoCheck ((fsm *) arg);
dirkx	0:a259777c45a3	1972	}
dirkx	0:a259777c45a3	1973	}
dirkx	0:a259777c45a3	1974
dirkx	0:a259777c45a3	1975	/*
dirkx	0:a259777c45a3	1976	* LcpEchoReply - LCP has received a reply to the echo
dirkx	0:a259777c45a3	1977	*/
dirkx	0:a259777c45a3	1978	static void
dirkx	0:a259777c45a3	1979	lcp_received_echo_reply (fsm f, int id, u_char inp, int len)
dirkx	0:a259777c45a3	1980	{
dirkx	0:a259777c45a3	1981	u32_t magic;
dirkx	0:a259777c45a3	1982
dirkx	0:a259777c45a3	1983	LWIP_UNUSED_ARG(id);
dirkx	0:a259777c45a3	1984
dirkx	0:a259777c45a3	1985	/* Check the magic number - don't count replies from ourselves. */
dirkx	0:a259777c45a3	1986	if (len < 4) {
dirkx	0:a259777c45a3	1987	LCPDEBUG(LOG_WARNING, ("lcp: received short Echo-Reply, length %d\n", len));
dirkx	0:a259777c45a3	1988	return;
dirkx	0:a259777c45a3	1989	}
dirkx	0:a259777c45a3	1990	GETLONG(magic, inp);
dirkx	0:a259777c45a3	1991	if (lcp_gotoptions[f->unit].neg_magicnumber && magic == lcp_gotoptions[f->unit].magicnumber) {
dirkx	0:a259777c45a3	1992	LCPDEBUG(LOG_WARNING, ("appear to have received our own echo-reply!\n"));
dirkx	0:a259777c45a3	1993	return;
dirkx	0:a259777c45a3	1994	}
dirkx	0:a259777c45a3	1995
dirkx	0:a259777c45a3	1996	/* Reset the number of outstanding echo frames */
dirkx	0:a259777c45a3	1997	lcp_echos_pending = 0;
dirkx	0:a259777c45a3	1998	}
dirkx	0:a259777c45a3	1999
dirkx	0:a259777c45a3	2000	/*
dirkx	0:a259777c45a3	2001	* LcpSendEchoRequest - Send an echo request frame to the peer
dirkx	0:a259777c45a3	2002	*/
dirkx	0:a259777c45a3	2003	static void
dirkx	0:a259777c45a3	2004	LcpSendEchoRequest (fsm *f)
dirkx	0:a259777c45a3	2005	{
dirkx	0:a259777c45a3	2006	u32_t lcp_magic;
dirkx	0:a259777c45a3	2007	u_char pkt[4], *pktp;
dirkx	0:a259777c45a3	2008
dirkx	0:a259777c45a3	2009	/*
dirkx	0:a259777c45a3	2010	* Detect the failure of the peer at this point.
dirkx	0:a259777c45a3	2011	*/
dirkx	0:a259777c45a3	2012	if (lcp_echo_fails != 0) {
dirkx	0:a259777c45a3	2013	if (lcp_echos_pending++ >= lcp_echo_fails) {
dirkx	0:a259777c45a3	2014	LcpLinkFailure(f);
dirkx	0:a259777c45a3	2015	lcp_echos_pending = 0;
dirkx	0:a259777c45a3	2016	}
dirkx	0:a259777c45a3	2017	}
dirkx	0:a259777c45a3	2018
dirkx	0:a259777c45a3	2019	/*
dirkx	0:a259777c45a3	2020	* Make and send the echo request frame.
dirkx	0:a259777c45a3	2021	*/
dirkx	0:a259777c45a3	2022	if (f->state == LS_OPENED) {
dirkx	0:a259777c45a3	2023	lcp_magic = lcp_gotoptions[f->unit].magicnumber;
dirkx	0:a259777c45a3	2024	pktp = pkt;
dirkx	0:a259777c45a3	2025	PUTLONG(lcp_magic, pktp);
dirkx	0:a259777c45a3	2026	fsm_sdata(f, ECHOREQ, (u_char)(lcp_echo_number++ & 0xFF), pkt, (int)(pktp - pkt));
dirkx	0:a259777c45a3	2027	}
dirkx	0:a259777c45a3	2028	}
dirkx	0:a259777c45a3	2029
dirkx	0:a259777c45a3	2030	/*
dirkx	0:a259777c45a3	2031	* lcp_echo_lowerup - Start the timer for the LCP frame
dirkx	0:a259777c45a3	2032	*/
dirkx	0:a259777c45a3	2033
dirkx	0:a259777c45a3	2034	static void
dirkx	0:a259777c45a3	2035	lcp_echo_lowerup (int unit)
dirkx	0:a259777c45a3	2036	{
dirkx	0:a259777c45a3	2037	fsm *f = &lcp_fsm[unit];
dirkx	0:a259777c45a3	2038
dirkx	0:a259777c45a3	2039	/* Clear the parameters for generating echo frames */
dirkx	0:a259777c45a3	2040	lcp_echos_pending = 0;
dirkx	0:a259777c45a3	2041	lcp_echo_number = 0;
dirkx	0:a259777c45a3	2042	lcp_echo_timer_running = 0;
dirkx	0:a259777c45a3	2043
dirkx	0:a259777c45a3	2044	/* If a timeout interval is specified then start the timer */
dirkx	0:a259777c45a3	2045	if (lcp_echo_interval != 0) {
dirkx	0:a259777c45a3	2046	LcpEchoCheck (f);
dirkx	0:a259777c45a3	2047	}
dirkx	0:a259777c45a3	2048	}
dirkx	0:a259777c45a3	2049
dirkx	0:a259777c45a3	2050	/*
dirkx	0:a259777c45a3	2051	* lcp_echo_lowerdown - Stop the timer for the LCP frame
dirkx	0:a259777c45a3	2052	*/
dirkx	0:a259777c45a3	2053
dirkx	0:a259777c45a3	2054	static void
dirkx	0:a259777c45a3	2055	lcp_echo_lowerdown (int unit)
dirkx	0:a259777c45a3	2056	{
dirkx	0:a259777c45a3	2057	fsm *f = &lcp_fsm[unit];
dirkx	0:a259777c45a3	2058
dirkx	0:a259777c45a3	2059	if (lcp_echo_timer_running != 0) {
dirkx	0:a259777c45a3	2060	UNTIMEOUT (LcpEchoTimeout, f);
dirkx	0:a259777c45a3	2061	lcp_echo_timer_running = 0;
dirkx	0:a259777c45a3	2062	}
dirkx	0:a259777c45a3	2063	}
dirkx	0:a259777c45a3	2064
dirkx	0:a259777c45a3	2065	#endif /* PPP_SUPPORT */

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	14 Aug 2010
Imports:	49
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	2
Followers:	1

lwip/netif/ppp/lcp.c@0:a259777c45a3, 2010-08-14 (annotated)

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