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lwip/netif/ppp/lcp.c@0:d616ece2d859, 2010-09-18 (annotated)

Committer:: mbed714
Date:: Sat Sep 18 23:05:49 2010 +0000
Revision:: 0:d616ece2d859

Who changed what in which revision?

User	Revision	Line number	New contents of line
mbed714	0:d616ece2d859	1	/*****************************************************************************
mbed714	0:d616ece2d859	2	* lcp.c - Network Link Control Protocol program file.
mbed714	0:d616ece2d859	3	*
mbed714	0:d616ece2d859	4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
mbed714	0:d616ece2d859	5	* portions Copyright (c) 1997 by Global Election Systems Inc.
mbed714	0:d616ece2d859	6	*
mbed714	0:d616ece2d859	7	* The authors hereby grant permission to use, copy, modify, distribute,
mbed714	0:d616ece2d859	8	* and license this software and its documentation for any purpose, provided
mbed714	0:d616ece2d859	9	* that existing copyright notices are retained in all copies and that this
mbed714	0:d616ece2d859	10	* notice and the following disclaimer are included verbatim in any
mbed714	0:d616ece2d859	11	* distributions. No written agreement, license, or royalty fee is required
mbed714	0:d616ece2d859	12	* for any of the authorized uses.
mbed714	0:d616ece2d859	13	*
mbed714	0:d616ece2d859	14	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
mbed714	0:d616ece2d859	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
mbed714	0:d616ece2d859	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
mbed714	0:d616ece2d859	17	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
mbed714	0:d616ece2d859	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
mbed714	0:d616ece2d859	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
mbed714	0:d616ece2d859	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
mbed714	0:d616ece2d859	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
mbed714	0:d616ece2d859	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
mbed714	0:d616ece2d859	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed714	0:d616ece2d859	24	*
mbed714	0:d616ece2d859	25	******************************************************************************
mbed714	0:d616ece2d859	26	* REVISION HISTORY
mbed714	0:d616ece2d859	27	*
mbed714	0:d616ece2d859	28	* 03-01-01 Marc Boucher <marc@mbsi.ca>
mbed714	0:d616ece2d859	29	* Ported to lwIP.
mbed714	0:d616ece2d859	30	* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
mbed714	0:d616ece2d859	31	* Original.
mbed714	0:d616ece2d859	32	*****************************************************************************/
mbed714	0:d616ece2d859	33
mbed714	0:d616ece2d859	34	/*
mbed714	0:d616ece2d859	35	* lcp.c - PPP Link Control Protocol.
mbed714	0:d616ece2d859	36	*
mbed714	0:d616ece2d859	37	* Copyright (c) 1989 Carnegie Mellon University.
mbed714	0:d616ece2d859	38	* All rights reserved.
mbed714	0:d616ece2d859	39	*
mbed714	0:d616ece2d859	40	* Redistribution and use in source and binary forms are permitted
mbed714	0:d616ece2d859	41	* provided that the above copyright notice and this paragraph are
mbed714	0:d616ece2d859	42	* duplicated in all such forms and that any documentation,
mbed714	0:d616ece2d859	43	* advertising materials, and other materials related to such
mbed714	0:d616ece2d859	44	* distribution and use acknowledge that the software was developed
mbed714	0:d616ece2d859	45	* by Carnegie Mellon University. The name of the
mbed714	0:d616ece2d859	46	* University may not be used to endorse or promote products derived
mbed714	0:d616ece2d859	47	* from this software without specific prior written permission.
mbed714	0:d616ece2d859	48	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
mbed714	0:d616ece2d859	49	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
mbed714	0:d616ece2d859	50	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
mbed714	0:d616ece2d859	51	*/
mbed714	0:d616ece2d859	52
mbed714	0:d616ece2d859	53
mbed714	0:d616ece2d859	54	#include "lwip/opt.h"
mbed714	0:d616ece2d859	55
mbed714	0:d616ece2d859	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
mbed714	0:d616ece2d859	57
mbed714	0:d616ece2d859	58	#include "ppp.h"
mbed714	0:d616ece2d859	59	#include "pppdebug.h"
mbed714	0:d616ece2d859	60
mbed714	0:d616ece2d859	61	#include "fsm.h"
mbed714	0:d616ece2d859	62	#include "chap.h"
mbed714	0:d616ece2d859	63	#include "magic.h"
mbed714	0:d616ece2d859	64	#include "auth.h"
mbed714	0:d616ece2d859	65	#include "lcp.h"
mbed714	0:d616ece2d859	66
mbed714	0:d616ece2d859	67	#include <string.h>
mbed714	0:d616ece2d859	68
mbed714	0:d616ece2d859	69	#if PPPOE_SUPPORT
mbed714	0:d616ece2d859	70	#include "netif/ppp_oe.h"
mbed714	0:d616ece2d859	71	#else
mbed714	0:d616ece2d859	72	#define PPPOE_MAXMTU PPP_MAXMRU
mbed714	0:d616ece2d859	73	#endif
mbed714	0:d616ece2d859	74
mbed714	0:d616ece2d859	75	#if 0 /* UNUSED */
mbed714	0:d616ece2d859	76	/*
mbed714	0:d616ece2d859	77	* LCP-related command-line options.
mbed714	0:d616ece2d859	78	*/
mbed714	0:d616ece2d859	79	int lcp_echo_interval = 0; /* Interval between LCP echo-requests */
mbed714	0:d616ece2d859	80	int lcp_echo_fails = 0; /* Tolerance to unanswered echo-requests */
mbed714	0:d616ece2d859	81	bool lax_recv = 0; /* accept control chars in asyncmap */
mbed714	0:d616ece2d859	82
mbed714	0:d616ece2d859	83	static int setescape (char **);
mbed714	0:d616ece2d859	84
mbed714	0:d616ece2d859	85	static option_t lcp_option_list[] = {
mbed714	0:d616ece2d859	86	/* LCP options */
mbed714	0:d616ece2d859	87	/* list stripped for simplicity */
mbed714	0:d616ece2d859	88	{NULL}
mbed714	0:d616ece2d859	89	};
mbed714	0:d616ece2d859	90	#endif /* UNUSED */
mbed714	0:d616ece2d859	91
mbed714	0:d616ece2d859	92	/* options */
mbed714	0:d616ece2d859	93	LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */
mbed714	0:d616ece2d859	94	static u_int lcp_echo_interval = LCP_ECHOINTERVAL; /* Interval between LCP echo-requests */
mbed714	0:d616ece2d859	95	static u_int lcp_echo_fails = LCP_MAXECHOFAILS; /* Tolerance to unanswered echo-requests */
mbed714	0:d616ece2d859	96
mbed714	0:d616ece2d859	97	/* global vars */
mbed714	0:d616ece2d859	98	static fsm lcp_fsm[NUM_PPP]; /* LCP fsm structure (global)*/
mbed714	0:d616ece2d859	99	lcp_options lcp_wantoptions[NUM_PPP]; /* Options that we want to request */
mbed714	0:d616ece2d859	100	lcp_options lcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
mbed714	0:d616ece2d859	101	lcp_options lcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
mbed714	0:d616ece2d859	102	lcp_options lcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
mbed714	0:d616ece2d859	103	ext_accm xmit_accm[NUM_PPP]; /* extended transmit ACCM */
mbed714	0:d616ece2d859	104
mbed714	0:d616ece2d859	105	static u32_t lcp_echos_pending = 0; /* Number of outstanding echo msgs */
mbed714	0:d616ece2d859	106	static u32_t lcp_echo_number = 0; /* ID number of next echo frame */
mbed714	0:d616ece2d859	107	static u32_t lcp_echo_timer_running = 0; /* TRUE if a timer is running */
mbed714	0:d616ece2d859	108
mbed714	0:d616ece2d859	109	/* @todo: do we really need such a large buffer? The typical 1500 bytes seem too much. */
mbed714	0:d616ece2d859	110	static u_char nak_buffer[PPP_MRU]; /* where we construct a nak packet */
mbed714	0:d616ece2d859	111
mbed714	0:d616ece2d859	112	/*
mbed714	0:d616ece2d859	113	* Callbacks for fsm code. (CI = Configuration Information)
mbed714	0:d616ece2d859	114	*/
mbed714	0:d616ece2d859	115	static void lcp_resetci (fsm); / Reset our CI */
mbed714	0:d616ece2d859	116	static int lcp_cilen (fsm); / Return length of our CI */
mbed714	0:d616ece2d859	117	static void lcp_addci (fsm, u_char, int); / Add our CI to pkt */
mbed714	0:d616ece2d859	118	static int lcp_ackci (fsm, u_char, int); /* Peer ack'd our CI */
mbed714	0:d616ece2d859	119	static int lcp_nakci (fsm, u_char, int); /* Peer nak'd our CI */
mbed714	0:d616ece2d859	120	static int lcp_rejci (fsm, u_char, int); /* Peer rej'd our CI */
mbed714	0:d616ece2d859	121	static int lcp_reqci (fsm, u_char, int, int); / Rcv peer CI */
mbed714	0:d616ece2d859	122	static void lcp_up (fsm); / We're UP */
mbed714	0:d616ece2d859	123	static void lcp_down (fsm); / We're DOWN */
mbed714	0:d616ece2d859	124	static void lcp_starting (fsm); / We need lower layer up */
mbed714	0:d616ece2d859	125	static void lcp_finished (fsm); / We need lower layer down */
mbed714	0:d616ece2d859	126	static int lcp_extcode (fsm, int, u_char, u_char, int);
mbed714	0:d616ece2d859	127	static void lcp_rprotrej (fsm, u_char, int);
mbed714	0:d616ece2d859	128
mbed714	0:d616ece2d859	129	/*
mbed714	0:d616ece2d859	130	* routines to send LCP echos to peer
mbed714	0:d616ece2d859	131	*/
mbed714	0:d616ece2d859	132
mbed714	0:d616ece2d859	133	static void lcp_echo_lowerup (int);
mbed714	0:d616ece2d859	134	static void lcp_echo_lowerdown (int);
mbed714	0:d616ece2d859	135	static void LcpEchoTimeout (void*);
mbed714	0:d616ece2d859	136	static void lcp_received_echo_reply (fsm, int, u_char, int);
mbed714	0:d616ece2d859	137	static void LcpSendEchoRequest (fsm*);
mbed714	0:d616ece2d859	138	static void LcpLinkFailure (fsm*);
mbed714	0:d616ece2d859	139	static void LcpEchoCheck (fsm*);
mbed714	0:d616ece2d859	140
mbed714	0:d616ece2d859	141	static fsm_callbacks lcp_callbacks = { /* LCP callback routines */
mbed714	0:d616ece2d859	142	lcp_resetci, /* Reset our Configuration Information */
mbed714	0:d616ece2d859	143	lcp_cilen, /* Length of our Configuration Information */
mbed714	0:d616ece2d859	144	lcp_addci, /* Add our Configuration Information */
mbed714	0:d616ece2d859	145	lcp_ackci, /* ACK our Configuration Information */
mbed714	0:d616ece2d859	146	lcp_nakci, /* NAK our Configuration Information */
mbed714	0:d616ece2d859	147	lcp_rejci, /* Reject our Configuration Information */
mbed714	0:d616ece2d859	148	lcp_reqci, /* Request peer's Configuration Information */
mbed714	0:d616ece2d859	149	lcp_up, /* Called when fsm reaches LS_OPENED state */
mbed714	0:d616ece2d859	150	lcp_down, /* Called when fsm leaves LS_OPENED state */
mbed714	0:d616ece2d859	151	lcp_starting, /* Called when we want the lower layer up */
mbed714	0:d616ece2d859	152	lcp_finished, /* Called when we want the lower layer down */
mbed714	0:d616ece2d859	153	NULL, /* Called when Protocol-Reject received */
mbed714	0:d616ece2d859	154	NULL, /* Retransmission is necessary */
mbed714	0:d616ece2d859	155	lcp_extcode, /* Called to handle LCP-specific codes */
mbed714	0:d616ece2d859	156	"LCP" /* String name of protocol */
mbed714	0:d616ece2d859	157	};
mbed714	0:d616ece2d859	158
mbed714	0:d616ece2d859	159	/*
mbed714	0:d616ece2d859	160	* Protocol entry points.
mbed714	0:d616ece2d859	161	* Some of these are called directly.
mbed714	0:d616ece2d859	162	*/
mbed714	0:d616ece2d859	163
mbed714	0:d616ece2d859	164	static void lcp_input (int, u_char *, int);
mbed714	0:d616ece2d859	165	static void lcp_protrej (int);
mbed714	0:d616ece2d859	166
mbed714	0:d616ece2d859	167	struct protent lcp_protent = {
mbed714	0:d616ece2d859	168	PPP_LCP,
mbed714	0:d616ece2d859	169	lcp_init,
mbed714	0:d616ece2d859	170	lcp_input,
mbed714	0:d616ece2d859	171	lcp_protrej,
mbed714	0:d616ece2d859	172	lcp_lowerup,
mbed714	0:d616ece2d859	173	lcp_lowerdown,
mbed714	0:d616ece2d859	174	lcp_open,
mbed714	0:d616ece2d859	175	lcp_close,
mbed714	0:d616ece2d859	176	#if PPP_ADDITIONAL_CALLBACKS
mbed714	0:d616ece2d859	177	lcp_printpkt,
mbed714	0:d616ece2d859	178	NULL,
mbed714	0:d616ece2d859	179	#endif /* PPP_ADDITIONAL_CALLBACKS */
mbed714	0:d616ece2d859	180	1,
mbed714	0:d616ece2d859	181	"LCP",
mbed714	0:d616ece2d859	182	#if PPP_ADDITIONAL_CALLBACKS
mbed714	0:d616ece2d859	183	NULL,
mbed714	0:d616ece2d859	184	NULL,
mbed714	0:d616ece2d859	185	NULL
mbed714	0:d616ece2d859	186	#endif /* PPP_ADDITIONAL_CALLBACKS */
mbed714	0:d616ece2d859	187	};
mbed714	0:d616ece2d859	188
mbed714	0:d616ece2d859	189	int lcp_loopbackfail = DEFLOOPBACKFAIL;
mbed714	0:d616ece2d859	190
mbed714	0:d616ece2d859	191	/*
mbed714	0:d616ece2d859	192	* Length of each type of configuration option (in octets)
mbed714	0:d616ece2d859	193	*/
mbed714	0:d616ece2d859	194	#define CILEN_VOID 2
mbed714	0:d616ece2d859	195	#define CILEN_CHAR 3
mbed714	0:d616ece2d859	196	#define CILEN_SHORT 4 /* CILEN_VOID + sizeof(short) */
mbed714	0:d616ece2d859	197	#define CILEN_CHAP 5 /* CILEN_VOID + sizeof(short) + 1 */
mbed714	0:d616ece2d859	198	#define CILEN_LONG 6 /* CILEN_VOID + sizeof(long) */
mbed714	0:d616ece2d859	199	#define CILEN_LQR 8 /* CILEN_VOID + sizeof(short) + sizeof(long) */
mbed714	0:d616ece2d859	200	#define CILEN_CBCP 3
mbed714	0:d616ece2d859	201
mbed714	0:d616ece2d859	202	#define CODENAME(x) ((x) == CONFACK ? "ACK" : (x) == CONFNAK ? "NAK" : "REJ")
mbed714	0:d616ece2d859	203
mbed714	0:d616ece2d859	204	#if 0 /* UNUSED */
mbed714	0:d616ece2d859	205	/*
mbed714	0:d616ece2d859	206	* setescape - add chars to the set we escape on transmission.
mbed714	0:d616ece2d859	207	*/
mbed714	0:d616ece2d859	208	static int
mbed714	0:d616ece2d859	209	setescape(argv)
mbed714	0:d616ece2d859	210	char **argv;
mbed714	0:d616ece2d859	211	{
mbed714	0:d616ece2d859	212	int n, ret;
mbed714	0:d616ece2d859	213	char p, endp;
mbed714	0:d616ece2d859	214
mbed714	0:d616ece2d859	215	p = *argv;
mbed714	0:d616ece2d859	216	ret = 1;
mbed714	0:d616ece2d859	217	while (*p) {
mbed714	0:d616ece2d859	218	n = strtol(p, &endp, 16);
mbed714	0:d616ece2d859	219	if (p == endp) {
mbed714	0:d616ece2d859	220	option_error("escape parameter contains invalid hex number '%s'", p);
mbed714	0:d616ece2d859	221	return 0;
mbed714	0:d616ece2d859	222	}
mbed714	0:d616ece2d859	223	p = endp;
mbed714	0:d616ece2d859	224	if (n < 0 \|\| n == 0x5E \|\| n > 0xFF) {
mbed714	0:d616ece2d859	225	option_error("can't escape character 0x%x", n);
mbed714	0:d616ece2d859	226	ret = 0;
mbed714	0:d616ece2d859	227	} else
mbed714	0:d616ece2d859	228	xmit_accm[0][n >> 5] \|= 1 << (n & 0x1F);
mbed714	0:d616ece2d859	229	while (p == ',' \|\| p == ' ')
mbed714	0:d616ece2d859	230	++p;
mbed714	0:d616ece2d859	231	}
mbed714	0:d616ece2d859	232	return ret;
mbed714	0:d616ece2d859	233	}
mbed714	0:d616ece2d859	234	#endif /* UNUSED */
mbed714	0:d616ece2d859	235
mbed714	0:d616ece2d859	236	/*
mbed714	0:d616ece2d859	237	* lcp_init - Initialize LCP.
mbed714	0:d616ece2d859	238	*/
mbed714	0:d616ece2d859	239	void
mbed714	0:d616ece2d859	240	lcp_init(int unit)
mbed714	0:d616ece2d859	241	{
mbed714	0:d616ece2d859	242	fsm *f = &lcp_fsm[unit];
mbed714	0:d616ece2d859	243	lcp_options *wo = &lcp_wantoptions[unit];
mbed714	0:d616ece2d859	244	lcp_options *ao = &lcp_allowoptions[unit];
mbed714	0:d616ece2d859	245
mbed714	0:d616ece2d859	246	f->unit = unit;
mbed714	0:d616ece2d859	247	f->protocol = PPP_LCP;
mbed714	0:d616ece2d859	248	f->callbacks = &lcp_callbacks;
mbed714	0:d616ece2d859	249
mbed714	0:d616ece2d859	250	fsm_init(f);
mbed714	0:d616ece2d859	251
mbed714	0:d616ece2d859	252	wo->passive = 0;
mbed714	0:d616ece2d859	253	wo->silent = 0;
mbed714	0:d616ece2d859	254	wo->restart = 0; /* Set to 1 in kernels or multi-line implementations */
mbed714	0:d616ece2d859	255	wo->neg_mru = 1;
mbed714	0:d616ece2d859	256	wo->mru = PPP_DEFMRU;
mbed714	0:d616ece2d859	257	wo->neg_asyncmap = 1;
mbed714	0:d616ece2d859	258	wo->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
mbed714	0:d616ece2d859	259	wo->neg_chap = 0; /* Set to 1 on server */
mbed714	0:d616ece2d859	260	wo->neg_upap = 0; /* Set to 1 on server */
mbed714	0:d616ece2d859	261	wo->chap_mdtype = CHAP_DIGEST_MD5;
mbed714	0:d616ece2d859	262	wo->neg_magicnumber = 1;
mbed714	0:d616ece2d859	263	wo->neg_pcompression = 1;
mbed714	0:d616ece2d859	264	wo->neg_accompression = 1;
mbed714	0:d616ece2d859	265	wo->neg_lqr = 0; /* no LQR implementation yet */
mbed714	0:d616ece2d859	266	wo->neg_cbcp = 0;
mbed714	0:d616ece2d859	267
mbed714	0:d616ece2d859	268	ao->neg_mru = 1;
mbed714	0:d616ece2d859	269	ao->mru = PPP_MAXMRU;
mbed714	0:d616ece2d859	270	ao->neg_asyncmap = 1;
mbed714	0:d616ece2d859	271	ao->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
mbed714	0:d616ece2d859	272	ao->neg_chap = (CHAP_SUPPORT != 0);
mbed714	0:d616ece2d859	273	ao->chap_mdtype = CHAP_DIGEST_MD5;
mbed714	0:d616ece2d859	274	ao->neg_upap = (PAP_SUPPORT != 0);
mbed714	0:d616ece2d859	275	ao->neg_magicnumber = 1;
mbed714	0:d616ece2d859	276	ao->neg_pcompression = 1;
mbed714	0:d616ece2d859	277	ao->neg_accompression = 1;
mbed714	0:d616ece2d859	278	ao->neg_lqr = 0; /* no LQR implementation yet */
mbed714	0:d616ece2d859	279	ao->neg_cbcp = (CBCP_SUPPORT != 0);
mbed714	0:d616ece2d859	280
mbed714	0:d616ece2d859	281	/*
mbed714	0:d616ece2d859	282	* Set transmit escape for the flag and escape characters plus anything
mbed714	0:d616ece2d859	283	* set for the allowable options.
mbed714	0:d616ece2d859	284	*/
mbed714	0:d616ece2d859	285	memset(xmit_accm[unit], 0, sizeof(xmit_accm[0]));
mbed714	0:d616ece2d859	286	xmit_accm[unit][15] = 0x60;
mbed714	0:d616ece2d859	287	xmit_accm[unit][0] = (u_char)((ao->asyncmap & 0xFF));
mbed714	0:d616ece2d859	288	xmit_accm[unit][1] = (u_char)((ao->asyncmap >> 8) & 0xFF);
mbed714	0:d616ece2d859	289	xmit_accm[unit][2] = (u_char)((ao->asyncmap >> 16) & 0xFF);
mbed714	0:d616ece2d859	290	xmit_accm[unit][3] = (u_char)((ao->asyncmap >> 24) & 0xFF);
mbed714	0:d616ece2d859	291	LCPDEBUG(LOG_INFO, ("lcp_init: xmit_accm=%X %X %X %X\n",
mbed714	0:d616ece2d859	292	xmit_accm[unit][0],
mbed714	0:d616ece2d859	293	xmit_accm[unit][1],
mbed714	0:d616ece2d859	294	xmit_accm[unit][2],
mbed714	0:d616ece2d859	295	xmit_accm[unit][3]));
mbed714	0:d616ece2d859	296
mbed714	0:d616ece2d859	297	lcp_phase[unit] = PHASE_INITIALIZE;
mbed714	0:d616ece2d859	298	}
mbed714	0:d616ece2d859	299
mbed714	0:d616ece2d859	300
mbed714	0:d616ece2d859	301	/*
mbed714	0:d616ece2d859	302	* lcp_open - LCP is allowed to come up.
mbed714	0:d616ece2d859	303	*/
mbed714	0:d616ece2d859	304	void
mbed714	0:d616ece2d859	305	lcp_open(int unit)
mbed714	0:d616ece2d859	306	{
mbed714	0:d616ece2d859	307	fsm *f = &lcp_fsm[unit];
mbed714	0:d616ece2d859	308	lcp_options *wo = &lcp_wantoptions[unit];
mbed714	0:d616ece2d859	309
mbed714	0:d616ece2d859	310	f->flags = 0;
mbed714	0:d616ece2d859	311	if (wo->passive) {
mbed714	0:d616ece2d859	312	f->flags \|= OPT_PASSIVE;
mbed714	0:d616ece2d859	313	}
mbed714	0:d616ece2d859	314	if (wo->silent) {
mbed714	0:d616ece2d859	315	f->flags \|= OPT_SILENT;
mbed714	0:d616ece2d859	316	}
mbed714	0:d616ece2d859	317	fsm_open(f);
mbed714	0:d616ece2d859	318
mbed714	0:d616ece2d859	319	lcp_phase[unit] = PHASE_ESTABLISH;
mbed714	0:d616ece2d859	320	}
mbed714	0:d616ece2d859	321
mbed714	0:d616ece2d859	322
mbed714	0:d616ece2d859	323	/*
mbed714	0:d616ece2d859	324	* lcp_close - Take LCP down.
mbed714	0:d616ece2d859	325	*/
mbed714	0:d616ece2d859	326	void
mbed714	0:d616ece2d859	327	lcp_close(int unit, char *reason)
mbed714	0:d616ece2d859	328	{
mbed714	0:d616ece2d859	329	fsm *f = &lcp_fsm[unit];
mbed714	0:d616ece2d859	330
mbed714	0:d616ece2d859	331	if (lcp_phase[unit] != PHASE_DEAD) {
mbed714	0:d616ece2d859	332	lcp_phase[unit] = PHASE_TERMINATE;
mbed714	0:d616ece2d859	333	}
mbed714	0:d616ece2d859	334	if (f->state == LS_STOPPED && f->flags & (OPT_PASSIVE\|OPT_SILENT)) {
mbed714	0:d616ece2d859	335	/*
mbed714	0:d616ece2d859	336	* This action is not strictly according to the FSM in RFC1548,
mbed714	0:d616ece2d859	337	* but it does mean that the program terminates if you do an
mbed714	0:d616ece2d859	338	* lcp_close() in passive/silent mode when a connection hasn't
mbed714	0:d616ece2d859	339	* been established.
mbed714	0:d616ece2d859	340	*/
mbed714	0:d616ece2d859	341	f->state = LS_CLOSED;
mbed714	0:d616ece2d859	342	lcp_finished(f);
mbed714	0:d616ece2d859	343	} else {
mbed714	0:d616ece2d859	344	fsm_close(f, reason);
mbed714	0:d616ece2d859	345	}
mbed714	0:d616ece2d859	346	}
mbed714	0:d616ece2d859	347
mbed714	0:d616ece2d859	348
mbed714	0:d616ece2d859	349	/*
mbed714	0:d616ece2d859	350	* lcp_lowerup - The lower layer is up.
mbed714	0:d616ece2d859	351	*/
mbed714	0:d616ece2d859	352	void
mbed714	0:d616ece2d859	353	lcp_lowerup(int unit)
mbed714	0:d616ece2d859	354	{
mbed714	0:d616ece2d859	355	lcp_options *wo = &lcp_wantoptions[unit];
mbed714	0:d616ece2d859	356
mbed714	0:d616ece2d859	357	/*
mbed714	0:d616ece2d859	358	* Don't use A/C or protocol compression on transmission,
mbed714	0:d616ece2d859	359	* but accept A/C and protocol compressed packets
mbed714	0:d616ece2d859	360	* if we are going to ask for A/C and protocol compression.
mbed714	0:d616ece2d859	361	*/
mbed714	0:d616ece2d859	362	ppp_set_xaccm(unit, &xmit_accm[unit]);
mbed714	0:d616ece2d859	363	ppp_send_config(unit, PPP_MRU, 0xffffffffl, 0, 0);
mbed714	0:d616ece2d859	364	ppp_recv_config(unit, PPP_MRU, 0x00000000l,
mbed714	0:d616ece2d859	365	wo->neg_pcompression, wo->neg_accompression);
mbed714	0:d616ece2d859	366	peer_mru[unit] = PPP_MRU;
mbed714	0:d616ece2d859	367	lcp_allowoptions[unit].asyncmap = (u_long)xmit_accm[unit][0]
mbed714	0:d616ece2d859	368	\| ((u_long)xmit_accm[unit][1] << 8)
mbed714	0:d616ece2d859	369	\| ((u_long)xmit_accm[unit][2] << 16)
mbed714	0:d616ece2d859	370	\| ((u_long)xmit_accm[unit][3] << 24);
mbed714	0:d616ece2d859	371	LCPDEBUG(LOG_INFO, ("lcp_lowerup: asyncmap=%X %X %X %X\n",
mbed714	0:d616ece2d859	372	xmit_accm[unit][3],
mbed714	0:d616ece2d859	373	xmit_accm[unit][2],
mbed714	0:d616ece2d859	374	xmit_accm[unit][1],
mbed714	0:d616ece2d859	375	xmit_accm[unit][0]));
mbed714	0:d616ece2d859	376
mbed714	0:d616ece2d859	377	fsm_lowerup(&lcp_fsm[unit]);
mbed714	0:d616ece2d859	378	}
mbed714	0:d616ece2d859	379
mbed714	0:d616ece2d859	380
mbed714	0:d616ece2d859	381	/*
mbed714	0:d616ece2d859	382	* lcp_lowerdown - The lower layer is down.
mbed714	0:d616ece2d859	383	*/
mbed714	0:d616ece2d859	384	void
mbed714	0:d616ece2d859	385	lcp_lowerdown(int unit)
mbed714	0:d616ece2d859	386	{
mbed714	0:d616ece2d859	387	fsm_lowerdown(&lcp_fsm[unit]);
mbed714	0:d616ece2d859	388	}
mbed714	0:d616ece2d859	389
mbed714	0:d616ece2d859	390
mbed714	0:d616ece2d859	391	/*
mbed714	0:d616ece2d859	392	* lcp_input - Input LCP packet.
mbed714	0:d616ece2d859	393	*/
mbed714	0:d616ece2d859	394	static void
mbed714	0:d616ece2d859	395	lcp_input(int unit, u_char *p, int len)
mbed714	0:d616ece2d859	396	{
mbed714	0:d616ece2d859	397	fsm *f = &lcp_fsm[unit];
mbed714	0:d616ece2d859	398
mbed714	0:d616ece2d859	399	fsm_input(f, p, len);
mbed714	0:d616ece2d859	400	}
mbed714	0:d616ece2d859	401
mbed714	0:d616ece2d859	402
mbed714	0:d616ece2d859	403	/*
mbed714	0:d616ece2d859	404	* lcp_extcode - Handle a LCP-specific code.
mbed714	0:d616ece2d859	405	*/
mbed714	0:d616ece2d859	406	static int
mbed714	0:d616ece2d859	407	lcp_extcode(fsm f, int code, u_char id, u_char inp, int len)
mbed714	0:d616ece2d859	408	{
mbed714	0:d616ece2d859	409	u_char *magp;
mbed714	0:d616ece2d859	410
mbed714	0:d616ece2d859	411	switch( code ){
mbed714	0:d616ece2d859	412	case PROTREJ:
mbed714	0:d616ece2d859	413	lcp_rprotrej(f, inp, len);
mbed714	0:d616ece2d859	414	break;
mbed714	0:d616ece2d859	415
mbed714	0:d616ece2d859	416	case ECHOREQ:
mbed714	0:d616ece2d859	417	if (f->state != LS_OPENED) {
mbed714	0:d616ece2d859	418	break;
mbed714	0:d616ece2d859	419	}
mbed714	0:d616ece2d859	420	LCPDEBUG(LOG_INFO, ("lcp: Echo-Request, Rcvd id %d\n", id));
mbed714	0:d616ece2d859	421	magp = inp;
mbed714	0:d616ece2d859	422	PUTLONG(lcp_gotoptions[f->unit].magicnumber, magp);
mbed714	0:d616ece2d859	423	fsm_sdata(f, ECHOREP, id, inp, len);
mbed714	0:d616ece2d859	424	break;
mbed714	0:d616ece2d859	425
mbed714	0:d616ece2d859	426	case ECHOREP:
mbed714	0:d616ece2d859	427	lcp_received_echo_reply(f, id, inp, len);
mbed714	0:d616ece2d859	428	break;
mbed714	0:d616ece2d859	429
mbed714	0:d616ece2d859	430	case DISCREQ:
mbed714	0:d616ece2d859	431	break;
mbed714	0:d616ece2d859	432
mbed714	0:d616ece2d859	433	default:
mbed714	0:d616ece2d859	434	return 0;
mbed714	0:d616ece2d859	435	}
mbed714	0:d616ece2d859	436	return 1;
mbed714	0:d616ece2d859	437	}
mbed714	0:d616ece2d859	438
mbed714	0:d616ece2d859	439
mbed714	0:d616ece2d859	440	/*
mbed714	0:d616ece2d859	441	* lcp_rprotrej - Receive an Protocol-Reject.
mbed714	0:d616ece2d859	442	*
mbed714	0:d616ece2d859	443	* Figure out which protocol is rejected and inform it.
mbed714	0:d616ece2d859	444	*/
mbed714	0:d616ece2d859	445	static void
mbed714	0:d616ece2d859	446	lcp_rprotrej(fsm f, u_char inp, int len)
mbed714	0:d616ece2d859	447	{
mbed714	0:d616ece2d859	448	int i;
mbed714	0:d616ece2d859	449	struct protent *protp;
mbed714	0:d616ece2d859	450	u_short prot;
mbed714	0:d616ece2d859	451
mbed714	0:d616ece2d859	452	if (len < (int)sizeof (u_short)) {
mbed714	0:d616ece2d859	453	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd short Protocol-Reject packet!\n"));
mbed714	0:d616ece2d859	454	return;
mbed714	0:d616ece2d859	455	}
mbed714	0:d616ece2d859	456
mbed714	0:d616ece2d859	457	GETSHORT(prot, inp);
mbed714	0:d616ece2d859	458
mbed714	0:d616ece2d859	459	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd Protocol-Reject packet for %x!\n", prot));
mbed714	0:d616ece2d859	460
mbed714	0:d616ece2d859	461	/*
mbed714	0:d616ece2d859	462	* Protocol-Reject packets received in any state other than the LCP
mbed714	0:d616ece2d859	463	* LS_OPENED state SHOULD be silently discarded.
mbed714	0:d616ece2d859	464	*/
mbed714	0:d616ece2d859	465	if( f->state != LS_OPENED ) {
mbed714	0:d616ece2d859	466	LCPDEBUG(LOG_INFO, ("Protocol-Reject discarded: LCP in state %d\n", f->state));
mbed714	0:d616ece2d859	467	return;
mbed714	0:d616ece2d859	468	}
mbed714	0:d616ece2d859	469
mbed714	0:d616ece2d859	470	/*
mbed714	0:d616ece2d859	471	* Upcall the proper Protocol-Reject routine.
mbed714	0:d616ece2d859	472	*/
mbed714	0:d616ece2d859	473	for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
mbed714	0:d616ece2d859	474	if (protp->protocol == prot && protp->enabled_flag) {
mbed714	0:d616ece2d859	475	(*protp->protrej)(f->unit);
mbed714	0:d616ece2d859	476	return;
mbed714	0:d616ece2d859	477	}
mbed714	0:d616ece2d859	478	}
mbed714	0:d616ece2d859	479
mbed714	0:d616ece2d859	480	LCPDEBUG(LOG_WARNING, ("Protocol-Reject for unsupported protocol 0x%x\n", prot));
mbed714	0:d616ece2d859	481	}
mbed714	0:d616ece2d859	482
mbed714	0:d616ece2d859	483
mbed714	0:d616ece2d859	484	/*
mbed714	0:d616ece2d859	485	* lcp_protrej - A Protocol-Reject was received.
mbed714	0:d616ece2d859	486	*/
mbed714	0:d616ece2d859	487	static void
mbed714	0:d616ece2d859	488	lcp_protrej(int unit)
mbed714	0:d616ece2d859	489	{
mbed714	0:d616ece2d859	490	LWIP_UNUSED_ARG(unit);
mbed714	0:d616ece2d859	491	/*
mbed714	0:d616ece2d859	492	* Can't reject LCP!
mbed714	0:d616ece2d859	493	*/
mbed714	0:d616ece2d859	494	LCPDEBUG(LOG_WARNING, ("lcp_protrej: Received Protocol-Reject for LCP!\n"));
mbed714	0:d616ece2d859	495	fsm_protreject(&lcp_fsm[unit]);
mbed714	0:d616ece2d859	496	}
mbed714	0:d616ece2d859	497
mbed714	0:d616ece2d859	498
mbed714	0:d616ece2d859	499	/*
mbed714	0:d616ece2d859	500	* lcp_sprotrej - Send a Protocol-Reject for some protocol.
mbed714	0:d616ece2d859	501	*/
mbed714	0:d616ece2d859	502	void
mbed714	0:d616ece2d859	503	lcp_sprotrej(int unit, u_char *p, int len)
mbed714	0:d616ece2d859	504	{
mbed714	0:d616ece2d859	505	/*
mbed714	0:d616ece2d859	506	* Send back the protocol and the information field of the
mbed714	0:d616ece2d859	507	* rejected packet. We only get here if LCP is in the LS_OPENED state.
mbed714	0:d616ece2d859	508	*/
mbed714	0:d616ece2d859	509
mbed714	0:d616ece2d859	510	fsm_sdata(&lcp_fsm[unit], PROTREJ, ++lcp_fsm[unit].id, p, len);
mbed714	0:d616ece2d859	511	}
mbed714	0:d616ece2d859	512
mbed714	0:d616ece2d859	513
mbed714	0:d616ece2d859	514	/*
mbed714	0:d616ece2d859	515	* lcp_resetci - Reset our CI.
mbed714	0:d616ece2d859	516	*/
mbed714	0:d616ece2d859	517	static void
mbed714	0:d616ece2d859	518	lcp_resetci(fsm *f)
mbed714	0:d616ece2d859	519	{
mbed714	0:d616ece2d859	520	lcp_wantoptions[f->unit].magicnumber = magic();
mbed714	0:d616ece2d859	521	lcp_wantoptions[f->unit].numloops = 0;
mbed714	0:d616ece2d859	522	lcp_gotoptions[f->unit] = lcp_wantoptions[f->unit];
mbed714	0:d616ece2d859	523	peer_mru[f->unit] = PPP_MRU;
mbed714	0:d616ece2d859	524	auth_reset(f->unit);
mbed714	0:d616ece2d859	525	}
mbed714	0:d616ece2d859	526
mbed714	0:d616ece2d859	527
mbed714	0:d616ece2d859	528	/*
mbed714	0:d616ece2d859	529	* lcp_cilen - Return length of our CI.
mbed714	0:d616ece2d859	530	*/
mbed714	0:d616ece2d859	531	static int
mbed714	0:d616ece2d859	532	lcp_cilen(fsm *f)
mbed714	0:d616ece2d859	533	{
mbed714	0:d616ece2d859	534	lcp_options *go = &lcp_gotoptions[f->unit];
mbed714	0:d616ece2d859	535
mbed714	0:d616ece2d859	536	#define LENCIVOID(neg) ((neg) ? CILEN_VOID : 0)
mbed714	0:d616ece2d859	537	#define LENCICHAP(neg) ((neg) ? CILEN_CHAP : 0)
mbed714	0:d616ece2d859	538	#define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0)
mbed714	0:d616ece2d859	539	#define LENCILONG(neg) ((neg) ? CILEN_LONG : 0)
mbed714	0:d616ece2d859	540	#define LENCILQR(neg) ((neg) ? CILEN_LQR: 0)
mbed714	0:d616ece2d859	541	#define LENCICBCP(neg) ((neg) ? CILEN_CBCP: 0)
mbed714	0:d616ece2d859	542	/*
mbed714	0:d616ece2d859	543	* NB: we only ask for one of CHAP and UPAP, even if we will
mbed714	0:d616ece2d859	544	* accept either.
mbed714	0:d616ece2d859	545	*/
mbed714	0:d616ece2d859	546	return (LENCISHORT(go->neg_mru && go->mru != PPP_DEFMRU) +
mbed714	0:d616ece2d859	547	LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) +
mbed714	0:d616ece2d859	548	LENCICHAP(go->neg_chap) +
mbed714	0:d616ece2d859	549	LENCISHORT(!go->neg_chap && go->neg_upap) +
mbed714	0:d616ece2d859	550	LENCILQR(go->neg_lqr) +
mbed714	0:d616ece2d859	551	LENCICBCP(go->neg_cbcp) +
mbed714	0:d616ece2d859	552	LENCILONG(go->neg_magicnumber) +
mbed714	0:d616ece2d859	553	LENCIVOID(go->neg_pcompression) +
mbed714	0:d616ece2d859	554	LENCIVOID(go->neg_accompression));
mbed714	0:d616ece2d859	555	}
mbed714	0:d616ece2d859	556
mbed714	0:d616ece2d859	557
mbed714	0:d616ece2d859	558	/*
mbed714	0:d616ece2d859	559	* lcp_addci - Add our desired CIs to a packet.
mbed714	0:d616ece2d859	560	*/
mbed714	0:d616ece2d859	561	static void
mbed714	0:d616ece2d859	562	lcp_addci(fsm f, u_char ucp, int *lenp)
mbed714	0:d616ece2d859	563	{
mbed714	0:d616ece2d859	564	lcp_options *go = &lcp_gotoptions[f->unit];
mbed714	0:d616ece2d859	565	u_char *start_ucp = ucp;
mbed714	0:d616ece2d859	566
mbed714	0:d616ece2d859	567	#define ADDCIVOID(opt, neg) \
mbed714	0:d616ece2d859	568	if (neg) { \
mbed714	0:d616ece2d859	569	LCPDEBUG(LOG_INFO, ("lcp_addci: opt=%d\n", opt)); \
mbed714	0:d616ece2d859	570	PUTCHAR(opt, ucp); \
mbed714	0:d616ece2d859	571	PUTCHAR(CILEN_VOID, ucp); \
mbed714	0:d616ece2d859	572	}
mbed714	0:d616ece2d859	573	#define ADDCISHORT(opt, neg, val) \
mbed714	0:d616ece2d859	574	if (neg) { \
mbed714	0:d616ece2d859	575	LCPDEBUG(LOG_INFO, ("lcp_addci: INT opt=%d %X\n", opt, val)); \
mbed714	0:d616ece2d859	576	PUTCHAR(opt, ucp); \
mbed714	0:d616ece2d859	577	PUTCHAR(CILEN_SHORT, ucp); \
mbed714	0:d616ece2d859	578	PUTSHORT(val, ucp); \
mbed714	0:d616ece2d859	579	}
mbed714	0:d616ece2d859	580	#define ADDCICHAP(opt, neg, val, digest) \
mbed714	0:d616ece2d859	581	if (neg) { \
mbed714	0:d616ece2d859	582	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAP opt=%d %X\n", opt, val)); \
mbed714	0:d616ece2d859	583	PUTCHAR(opt, ucp); \
mbed714	0:d616ece2d859	584	PUTCHAR(CILEN_CHAP, ucp); \
mbed714	0:d616ece2d859	585	PUTSHORT(val, ucp); \
mbed714	0:d616ece2d859	586	PUTCHAR(digest, ucp); \
mbed714	0:d616ece2d859	587	}
mbed714	0:d616ece2d859	588	#define ADDCILONG(opt, neg, val) \
mbed714	0:d616ece2d859	589	if (neg) { \
mbed714	0:d616ece2d859	590	LCPDEBUG(LOG_INFO, ("lcp_addci: L opt=%d %lX\n", opt, val)); \
mbed714	0:d616ece2d859	591	PUTCHAR(opt, ucp); \
mbed714	0:d616ece2d859	592	PUTCHAR(CILEN_LONG, ucp); \
mbed714	0:d616ece2d859	593	PUTLONG(val, ucp); \
mbed714	0:d616ece2d859	594	}
mbed714	0:d616ece2d859	595	#define ADDCILQR(opt, neg, val) \
mbed714	0:d616ece2d859	596	if (neg) { \
mbed714	0:d616ece2d859	597	LCPDEBUG(LOG_INFO, ("lcp_addci: LQR opt=%d %lX\n", opt, val)); \
mbed714	0:d616ece2d859	598	PUTCHAR(opt, ucp); \
mbed714	0:d616ece2d859	599	PUTCHAR(CILEN_LQR, ucp); \
mbed714	0:d616ece2d859	600	PUTSHORT(PPP_LQR, ucp); \
mbed714	0:d616ece2d859	601	PUTLONG(val, ucp); \
mbed714	0:d616ece2d859	602	}
mbed714	0:d616ece2d859	603	#define ADDCICHAR(opt, neg, val) \
mbed714	0:d616ece2d859	604	if (neg) { \
mbed714	0:d616ece2d859	605	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAR opt=%d %X '%z'\n", opt, val, val)); \
mbed714	0:d616ece2d859	606	PUTCHAR(opt, ucp); \
mbed714	0:d616ece2d859	607	PUTCHAR(CILEN_CHAR, ucp); \
mbed714	0:d616ece2d859	608	PUTCHAR(val, ucp); \
mbed714	0:d616ece2d859	609	}
mbed714	0:d616ece2d859	610
mbed714	0:d616ece2d859	611	ADDCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
mbed714	0:d616ece2d859	612	ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
mbed714	0:d616ece2d859	613	ADDCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
mbed714	0:d616ece2d859	614	ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
mbed714	0:d616ece2d859	615	ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
mbed714	0:d616ece2d859	616	ADDCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
mbed714	0:d616ece2d859	617	ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
mbed714	0:d616ece2d859	618	ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
mbed714	0:d616ece2d859	619	ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
mbed714	0:d616ece2d859	620
mbed714	0:d616ece2d859	621	if (ucp - start_ucp != *lenp) {
mbed714	0:d616ece2d859	622	/* this should never happen, because peer_mtu should be 1500 */
mbed714	0:d616ece2d859	623	LCPDEBUG(LOG_ERR, ("Bug in lcp_addci: wrong length\n"));
mbed714	0:d616ece2d859	624	}
mbed714	0:d616ece2d859	625	}
mbed714	0:d616ece2d859	626
mbed714	0:d616ece2d859	627
mbed714	0:d616ece2d859	628	/*
mbed714	0:d616ece2d859	629	* lcp_ackci - Ack our CIs.
mbed714	0:d616ece2d859	630	* This should not modify any state if the Ack is bad.
mbed714	0:d616ece2d859	631	*
mbed714	0:d616ece2d859	632	* Returns:
mbed714	0:d616ece2d859	633	* 0 - Ack was bad.
mbed714	0:d616ece2d859	634	* 1 - Ack was good.
mbed714	0:d616ece2d859	635	*/
mbed714	0:d616ece2d859	636	static int
mbed714	0:d616ece2d859	637	lcp_ackci(fsm f, u_char p, int len)
mbed714	0:d616ece2d859	638	{
mbed714	0:d616ece2d859	639	lcp_options *go = &lcp_gotoptions[f->unit];
mbed714	0:d616ece2d859	640	u_char cilen, citype, cichar;
mbed714	0:d616ece2d859	641	u_short cishort;
mbed714	0:d616ece2d859	642	u32_t cilong;
mbed714	0:d616ece2d859	643
mbed714	0:d616ece2d859	644	/*
mbed714	0:d616ece2d859	645	* CIs must be in exactly the same order that we sent.
mbed714	0:d616ece2d859	646	* Check packet length and CI length at each step.
mbed714	0:d616ece2d859	647	* If we find any deviations, then this packet is bad.
mbed714	0:d616ece2d859	648	*/
mbed714	0:d616ece2d859	649	#define ACKCIVOID(opt, neg) \
mbed714	0:d616ece2d859	650	if (neg) { \
mbed714	0:d616ece2d859	651	if ((len -= CILEN_VOID) < 0) \
mbed714	0:d616ece2d859	652	goto bad; \
mbed714	0:d616ece2d859	653	GETCHAR(citype, p); \
mbed714	0:d616ece2d859	654	GETCHAR(cilen, p); \
mbed714	0:d616ece2d859	655	if (cilen != CILEN_VOID \|\| citype != opt) \
mbed714	0:d616ece2d859	656	goto bad; \
mbed714	0:d616ece2d859	657	}
mbed714	0:d616ece2d859	658	#define ACKCISHORT(opt, neg, val) \
mbed714	0:d616ece2d859	659	if (neg) { \
mbed714	0:d616ece2d859	660	if ((len -= CILEN_SHORT) < 0) \
mbed714	0:d616ece2d859	661	goto bad; \
mbed714	0:d616ece2d859	662	GETCHAR(citype, p); \
mbed714	0:d616ece2d859	663	GETCHAR(cilen, p); \
mbed714	0:d616ece2d859	664	if (cilen != CILEN_SHORT \|\| citype != opt) \
mbed714	0:d616ece2d859	665	goto bad; \
mbed714	0:d616ece2d859	666	GETSHORT(cishort, p); \
mbed714	0:d616ece2d859	667	if (cishort != val) \
mbed714	0:d616ece2d859	668	goto bad; \
mbed714	0:d616ece2d859	669	}
mbed714	0:d616ece2d859	670	#define ACKCICHAR(opt, neg, val) \
mbed714	0:d616ece2d859	671	if (neg) { \
mbed714	0:d616ece2d859	672	if ((len -= CILEN_CHAR) < 0) \
mbed714	0:d616ece2d859	673	goto bad; \
mbed714	0:d616ece2d859	674	GETCHAR(citype, p); \
mbed714	0:d616ece2d859	675	GETCHAR(cilen, p); \
mbed714	0:d616ece2d859	676	if (cilen != CILEN_CHAR \|\| citype != opt) \
mbed714	0:d616ece2d859	677	goto bad; \
mbed714	0:d616ece2d859	678	GETCHAR(cichar, p); \
mbed714	0:d616ece2d859	679	if (cichar != val) \
mbed714	0:d616ece2d859	680	goto bad; \
mbed714	0:d616ece2d859	681	}
mbed714	0:d616ece2d859	682	#define ACKCICHAP(opt, neg, val, digest) \
mbed714	0:d616ece2d859	683	if (neg) { \
mbed714	0:d616ece2d859	684	if ((len -= CILEN_CHAP) < 0) \
mbed714	0:d616ece2d859	685	goto bad; \
mbed714	0:d616ece2d859	686	GETCHAR(citype, p); \
mbed714	0:d616ece2d859	687	GETCHAR(cilen, p); \
mbed714	0:d616ece2d859	688	if (cilen != CILEN_CHAP \|\| citype != opt) \
mbed714	0:d616ece2d859	689	goto bad; \
mbed714	0:d616ece2d859	690	GETSHORT(cishort, p); \
mbed714	0:d616ece2d859	691	if (cishort != val) \
mbed714	0:d616ece2d859	692	goto bad; \
mbed714	0:d616ece2d859	693	GETCHAR(cichar, p); \
mbed714	0:d616ece2d859	694	if (cichar != digest) \
mbed714	0:d616ece2d859	695	goto bad; \
mbed714	0:d616ece2d859	696	}
mbed714	0:d616ece2d859	697	#define ACKCILONG(opt, neg, val) \
mbed714	0:d616ece2d859	698	if (neg) { \
mbed714	0:d616ece2d859	699	if ((len -= CILEN_LONG) < 0) \
mbed714	0:d616ece2d859	700	goto bad; \
mbed714	0:d616ece2d859	701	GETCHAR(citype, p); \
mbed714	0:d616ece2d859	702	GETCHAR(cilen, p); \
mbed714	0:d616ece2d859	703	if (cilen != CILEN_LONG \|\| citype != opt) \
mbed714	0:d616ece2d859	704	goto bad; \
mbed714	0:d616ece2d859	705	GETLONG(cilong, p); \
mbed714	0:d616ece2d859	706	if (cilong != val) \
mbed714	0:d616ece2d859	707	goto bad; \
mbed714	0:d616ece2d859	708	}
mbed714	0:d616ece2d859	709	#define ACKCILQR(opt, neg, val) \
mbed714	0:d616ece2d859	710	if (neg) { \
mbed714	0:d616ece2d859	711	if ((len -= CILEN_LQR) < 0) \
mbed714	0:d616ece2d859	712	goto bad; \
mbed714	0:d616ece2d859	713	GETCHAR(citype, p); \
mbed714	0:d616ece2d859	714	GETCHAR(cilen, p); \
mbed714	0:d616ece2d859	715	if (cilen != CILEN_LQR \|\| citype != opt) \
mbed714	0:d616ece2d859	716	goto bad; \
mbed714	0:d616ece2d859	717	GETSHORT(cishort, p); \
mbed714	0:d616ece2d859	718	if (cishort != PPP_LQR) \
mbed714	0:d616ece2d859	719	goto bad; \
mbed714	0:d616ece2d859	720	GETLONG(cilong, p); \
mbed714	0:d616ece2d859	721	if (cilong != val) \
mbed714	0:d616ece2d859	722	goto bad; \
mbed714	0:d616ece2d859	723	}
mbed714	0:d616ece2d859	724
mbed714	0:d616ece2d859	725	ACKCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
mbed714	0:d616ece2d859	726	ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
mbed714	0:d616ece2d859	727	ACKCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
mbed714	0:d616ece2d859	728	ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
mbed714	0:d616ece2d859	729	ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
mbed714	0:d616ece2d859	730	ACKCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
mbed714	0:d616ece2d859	731	ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
mbed714	0:d616ece2d859	732	ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
mbed714	0:d616ece2d859	733	ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
mbed714	0:d616ece2d859	734
mbed714	0:d616ece2d859	735	/*
mbed714	0:d616ece2d859	736	* If there are any remaining CIs, then this packet is bad.
mbed714	0:d616ece2d859	737	*/
mbed714	0:d616ece2d859	738	if (len != 0) {
mbed714	0:d616ece2d859	739	goto bad;
mbed714	0:d616ece2d859	740	}
mbed714	0:d616ece2d859	741	LCPDEBUG(LOG_INFO, ("lcp_acki: Ack\n"));
mbed714	0:d616ece2d859	742	return (1);
mbed714	0:d616ece2d859	743	bad:
mbed714	0:d616ece2d859	744	LCPDEBUG(LOG_WARNING, ("lcp_acki: received bad Ack!\n"));
mbed714	0:d616ece2d859	745	return (0);
mbed714	0:d616ece2d859	746	}
mbed714	0:d616ece2d859	747
mbed714	0:d616ece2d859	748
mbed714	0:d616ece2d859	749	/*
mbed714	0:d616ece2d859	750	* lcp_nakci - Peer has sent a NAK for some of our CIs.
mbed714	0:d616ece2d859	751	* This should not modify any state if the Nak is bad
mbed714	0:d616ece2d859	752	* or if LCP is in the LS_OPENED state.
mbed714	0:d616ece2d859	753	*
mbed714	0:d616ece2d859	754	* Returns:
mbed714	0:d616ece2d859	755	* 0 - Nak was bad.
mbed714	0:d616ece2d859	756	* 1 - Nak was good.
mbed714	0:d616ece2d859	757	*/
mbed714	0:d616ece2d859	758	static int
mbed714	0:d616ece2d859	759	lcp_nakci(fsm f, u_char p, int len)
mbed714	0:d616ece2d859	760	{
mbed714	0:d616ece2d859	761	lcp_options *go = &lcp_gotoptions[f->unit];
mbed714	0:d616ece2d859	762	lcp_options *wo = &lcp_wantoptions[f->unit];
mbed714	0:d616ece2d859	763	u_char citype, cichar, *next;
mbed714	0:d616ece2d859	764	u_short cishort;
mbed714	0:d616ece2d859	765	u32_t cilong;
mbed714	0:d616ece2d859	766	lcp_options no; /* options we've seen Naks for */
mbed714	0:d616ece2d859	767	lcp_options try; /* options to request next time */
mbed714	0:d616ece2d859	768	int looped_back = 0;
mbed714	0:d616ece2d859	769	int cilen;
mbed714	0:d616ece2d859	770
mbed714	0:d616ece2d859	771	BZERO(&no, sizeof(no));
mbed714	0:d616ece2d859	772	try = *go;
mbed714	0:d616ece2d859	773
mbed714	0:d616ece2d859	774	/*
mbed714	0:d616ece2d859	775	* Any Nak'd CIs must be in exactly the same order that we sent.
mbed714	0:d616ece2d859	776	* Check packet length and CI length at each step.
mbed714	0:d616ece2d859	777	* If we find any deviations, then this packet is bad.
mbed714	0:d616ece2d859	778	*/
mbed714	0:d616ece2d859	779	#define NAKCIVOID(opt, neg, code) \
mbed714	0:d616ece2d859	780	if (go->neg && \
mbed714	0:d616ece2d859	781	len >= CILEN_VOID && \
mbed714	0:d616ece2d859	782	p[1] == CILEN_VOID && \
mbed714	0:d616ece2d859	783	p[0] == opt) { \
mbed714	0:d616ece2d859	784	len -= CILEN_VOID; \
mbed714	0:d616ece2d859	785	INCPTR(CILEN_VOID, p); \
mbed714	0:d616ece2d859	786	no.neg = 1; \
mbed714	0:d616ece2d859	787	code \
mbed714	0:d616ece2d859	788	}
mbed714	0:d616ece2d859	789	#define NAKCICHAP(opt, neg, code) \
mbed714	0:d616ece2d859	790	if (go->neg && \
mbed714	0:d616ece2d859	791	len >= CILEN_CHAP && \
mbed714	0:d616ece2d859	792	p[1] == CILEN_CHAP && \
mbed714	0:d616ece2d859	793	p[0] == opt) { \
mbed714	0:d616ece2d859	794	len -= CILEN_CHAP; \
mbed714	0:d616ece2d859	795	INCPTR(2, p); \
mbed714	0:d616ece2d859	796	GETSHORT(cishort, p); \
mbed714	0:d616ece2d859	797	GETCHAR(cichar, p); \
mbed714	0:d616ece2d859	798	no.neg = 1; \
mbed714	0:d616ece2d859	799	code \
mbed714	0:d616ece2d859	800	}
mbed714	0:d616ece2d859	801	#define NAKCICHAR(opt, neg, code) \
mbed714	0:d616ece2d859	802	if (go->neg && \
mbed714	0:d616ece2d859	803	len >= CILEN_CHAR && \
mbed714	0:d616ece2d859	804	p[1] == CILEN_CHAR && \
mbed714	0:d616ece2d859	805	p[0] == opt) { \
mbed714	0:d616ece2d859	806	len -= CILEN_CHAR; \
mbed714	0:d616ece2d859	807	INCPTR(2, p); \
mbed714	0:d616ece2d859	808	GETCHAR(cichar, p); \
mbed714	0:d616ece2d859	809	no.neg = 1; \
mbed714	0:d616ece2d859	810	code \
mbed714	0:d616ece2d859	811	}
mbed714	0:d616ece2d859	812	#define NAKCISHORT(opt, neg, code) \
mbed714	0:d616ece2d859	813	if (go->neg && \
mbed714	0:d616ece2d859	814	len >= CILEN_SHORT && \
mbed714	0:d616ece2d859	815	p[1] == CILEN_SHORT && \
mbed714	0:d616ece2d859	816	p[0] == opt) { \
mbed714	0:d616ece2d859	817	len -= CILEN_SHORT; \
mbed714	0:d616ece2d859	818	INCPTR(2, p); \
mbed714	0:d616ece2d859	819	GETSHORT(cishort, p); \
mbed714	0:d616ece2d859	820	no.neg = 1; \
mbed714	0:d616ece2d859	821	code \
mbed714	0:d616ece2d859	822	}
mbed714	0:d616ece2d859	823	#define NAKCILONG(opt, neg, code) \
mbed714	0:d616ece2d859	824	if (go->neg && \
mbed714	0:d616ece2d859	825	len >= CILEN_LONG && \
mbed714	0:d616ece2d859	826	p[1] == CILEN_LONG && \
mbed714	0:d616ece2d859	827	p[0] == opt) { \
mbed714	0:d616ece2d859	828	len -= CILEN_LONG; \
mbed714	0:d616ece2d859	829	INCPTR(2, p); \
mbed714	0:d616ece2d859	830	GETLONG(cilong, p); \
mbed714	0:d616ece2d859	831	no.neg = 1; \
mbed714	0:d616ece2d859	832	code \
mbed714	0:d616ece2d859	833	}
mbed714	0:d616ece2d859	834	#define NAKCILQR(opt, neg, code) \
mbed714	0:d616ece2d859	835	if (go->neg && \
mbed714	0:d616ece2d859	836	len >= CILEN_LQR && \
mbed714	0:d616ece2d859	837	p[1] == CILEN_LQR && \
mbed714	0:d616ece2d859	838	p[0] == opt) { \
mbed714	0:d616ece2d859	839	len -= CILEN_LQR; \
mbed714	0:d616ece2d859	840	INCPTR(2, p); \
mbed714	0:d616ece2d859	841	GETSHORT(cishort, p); \
mbed714	0:d616ece2d859	842	GETLONG(cilong, p); \
mbed714	0:d616ece2d859	843	no.neg = 1; \
mbed714	0:d616ece2d859	844	code \
mbed714	0:d616ece2d859	845	}
mbed714	0:d616ece2d859	846
mbed714	0:d616ece2d859	847	/*
mbed714	0:d616ece2d859	848	* We don't care if they want to send us smaller packets than
mbed714	0:d616ece2d859	849	* we want. Therefore, accept any MRU less than what we asked for,
mbed714	0:d616ece2d859	850	* but then ignore the new value when setting the MRU in the kernel.
mbed714	0:d616ece2d859	851	* If they send us a bigger MRU than what we asked, accept it, up to
mbed714	0:d616ece2d859	852	* the limit of the default MRU we'd get if we didn't negotiate.
mbed714	0:d616ece2d859	853	*/
mbed714	0:d616ece2d859	854	if (go->neg_mru && go->mru != PPP_DEFMRU) {
mbed714	0:d616ece2d859	855	NAKCISHORT(CI_MRU, neg_mru,
mbed714	0:d616ece2d859	856	if (cishort <= wo->mru \|\| cishort < PPP_DEFMRU) {
mbed714	0:d616ece2d859	857	try.mru = cishort;
mbed714	0:d616ece2d859	858	}
mbed714	0:d616ece2d859	859	);
mbed714	0:d616ece2d859	860	}
mbed714	0:d616ece2d859	861
mbed714	0:d616ece2d859	862	/*
mbed714	0:d616ece2d859	863	* Add any characters they want to our (receive-side) asyncmap.
mbed714	0:d616ece2d859	864	*/
mbed714	0:d616ece2d859	865	if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) {
mbed714	0:d616ece2d859	866	NAKCILONG(CI_ASYNCMAP, neg_asyncmap,
mbed714	0:d616ece2d859	867	try.asyncmap = go->asyncmap \| cilong;
mbed714	0:d616ece2d859	868	);
mbed714	0:d616ece2d859	869	}
mbed714	0:d616ece2d859	870
mbed714	0:d616ece2d859	871	/*
mbed714	0:d616ece2d859	872	* If they've nak'd our authentication-protocol, check whether
mbed714	0:d616ece2d859	873	* they are proposing a different protocol, or a different
mbed714	0:d616ece2d859	874	* hash algorithm for CHAP.
mbed714	0:d616ece2d859	875	*/
mbed714	0:d616ece2d859	876	if ((go->neg_chap \|\| go->neg_upap)
mbed714	0:d616ece2d859	877	&& len >= CILEN_SHORT
mbed714	0:d616ece2d859	878	&& p[0] == CI_AUTHTYPE && p[1] >= CILEN_SHORT && p[1] <= len) {
mbed714	0:d616ece2d859	879	cilen = p[1];
mbed714	0:d616ece2d859	880	len -= cilen;
mbed714	0:d616ece2d859	881	no.neg_chap = go->neg_chap;
mbed714	0:d616ece2d859	882	no.neg_upap = go->neg_upap;
mbed714	0:d616ece2d859	883	INCPTR(2, p);
mbed714	0:d616ece2d859	884	GETSHORT(cishort, p);
mbed714	0:d616ece2d859	885	if (cishort == PPP_PAP && cilen == CILEN_SHORT) {
mbed714	0:d616ece2d859	886	/*
mbed714	0:d616ece2d859	887	* If we were asking for CHAP, they obviously don't want to do it.
mbed714	0:d616ece2d859	888	* If we weren't asking for CHAP, then we were asking for PAP,
mbed714	0:d616ece2d859	889	* in which case this Nak is bad.
mbed714	0:d616ece2d859	890	*/
mbed714	0:d616ece2d859	891	if (!go->neg_chap) {
mbed714	0:d616ece2d859	892	goto bad;
mbed714	0:d616ece2d859	893	}
mbed714	0:d616ece2d859	894	try.neg_chap = 0;
mbed714	0:d616ece2d859	895
mbed714	0:d616ece2d859	896	} else if (cishort == PPP_CHAP && cilen == CILEN_CHAP) {
mbed714	0:d616ece2d859	897	GETCHAR(cichar, p);
mbed714	0:d616ece2d859	898	if (go->neg_chap) {
mbed714	0:d616ece2d859	899	/*
mbed714	0:d616ece2d859	900	* We were asking for CHAP/MD5; they must want a different
mbed714	0:d616ece2d859	901	* algorithm. If they can't do MD5, we'll have to stop
mbed714	0:d616ece2d859	902	* asking for CHAP.
mbed714	0:d616ece2d859	903	*/
mbed714	0:d616ece2d859	904	if (cichar != go->chap_mdtype) {
mbed714	0:d616ece2d859	905	try.neg_chap = 0;
mbed714	0:d616ece2d859	906	}
mbed714	0:d616ece2d859	907	} else {
mbed714	0:d616ece2d859	908	/*
mbed714	0:d616ece2d859	909	* Stop asking for PAP if we were asking for it.
mbed714	0:d616ece2d859	910	*/
mbed714	0:d616ece2d859	911	try.neg_upap = 0;
mbed714	0:d616ece2d859	912	}
mbed714	0:d616ece2d859	913
mbed714	0:d616ece2d859	914	} else {
mbed714	0:d616ece2d859	915	/*
mbed714	0:d616ece2d859	916	* We don't recognize what they're suggesting.
mbed714	0:d616ece2d859	917	* Stop asking for what we were asking for.
mbed714	0:d616ece2d859	918	*/
mbed714	0:d616ece2d859	919	if (go->neg_chap) {
mbed714	0:d616ece2d859	920	try.neg_chap = 0;
mbed714	0:d616ece2d859	921	} else {
mbed714	0:d616ece2d859	922	try.neg_upap = 0;
mbed714	0:d616ece2d859	923	}
mbed714	0:d616ece2d859	924	p += cilen - CILEN_SHORT;
mbed714	0:d616ece2d859	925	}
mbed714	0:d616ece2d859	926	}
mbed714	0:d616ece2d859	927
mbed714	0:d616ece2d859	928	/*
mbed714	0:d616ece2d859	929	* If they can't cope with our link quality protocol, we'll have
mbed714	0:d616ece2d859	930	* to stop asking for LQR. We haven't got any other protocol.
mbed714	0:d616ece2d859	931	* If they Nak the reporting period, take their value XXX ?
mbed714	0:d616ece2d859	932	*/
mbed714	0:d616ece2d859	933	NAKCILQR(CI_QUALITY, neg_lqr,
mbed714	0:d616ece2d859	934	if (cishort != PPP_LQR) {
mbed714	0:d616ece2d859	935	try.neg_lqr = 0;
mbed714	0:d616ece2d859	936	} else {
mbed714	0:d616ece2d859	937	try.lqr_period = cilong;
mbed714	0:d616ece2d859	938	}
mbed714	0:d616ece2d859	939	);
mbed714	0:d616ece2d859	940
mbed714	0:d616ece2d859	941	/*
mbed714	0:d616ece2d859	942	* Only implementing CBCP...not the rest of the callback options
mbed714	0:d616ece2d859	943	*/
mbed714	0:d616ece2d859	944	NAKCICHAR(CI_CALLBACK, neg_cbcp,
mbed714	0:d616ece2d859	945	try.neg_cbcp = 0;
mbed714	0:d616ece2d859	946	);
mbed714	0:d616ece2d859	947
mbed714	0:d616ece2d859	948	/*
mbed714	0:d616ece2d859	949	* Check for a looped-back line.
mbed714	0:d616ece2d859	950	*/
mbed714	0:d616ece2d859	951	NAKCILONG(CI_MAGICNUMBER, neg_magicnumber,
mbed714	0:d616ece2d859	952	try.magicnumber = magic();
mbed714	0:d616ece2d859	953	looped_back = 1;
mbed714	0:d616ece2d859	954	);
mbed714	0:d616ece2d859	955
mbed714	0:d616ece2d859	956	/*
mbed714	0:d616ece2d859	957	* Peer shouldn't send Nak for protocol compression or
mbed714	0:d616ece2d859	958	* address/control compression requests; they should send
mbed714	0:d616ece2d859	959	* a Reject instead. If they send a Nak, treat it as a Reject.
mbed714	0:d616ece2d859	960	*/
mbed714	0:d616ece2d859	961	NAKCIVOID(CI_PCOMPRESSION, neg_pcompression,
mbed714	0:d616ece2d859	962	try.neg_pcompression = 0;
mbed714	0:d616ece2d859	963	);
mbed714	0:d616ece2d859	964	NAKCIVOID(CI_ACCOMPRESSION, neg_accompression,
mbed714	0:d616ece2d859	965	try.neg_accompression = 0;
mbed714	0:d616ece2d859	966	);
mbed714	0:d616ece2d859	967
mbed714	0:d616ece2d859	968	/*
mbed714	0:d616ece2d859	969	* There may be remaining CIs, if the peer is requesting negotiation
mbed714	0:d616ece2d859	970	* on an option that we didn't include in our request packet.
mbed714	0:d616ece2d859	971	* If we see an option that we requested, or one we've already seen
mbed714	0:d616ece2d859	972	* in this packet, then this packet is bad.
mbed714	0:d616ece2d859	973	* If we wanted to respond by starting to negotiate on the requested
mbed714	0:d616ece2d859	974	* option(s), we could, but we don't, because except for the
mbed714	0:d616ece2d859	975	* authentication type and quality protocol, if we are not negotiating
mbed714	0:d616ece2d859	976	* an option, it is because we were told not to.
mbed714	0:d616ece2d859	977	* For the authentication type, the Nak from the peer means
mbed714	0:d616ece2d859	978	* `let me authenticate myself with you' which is a bit pointless.
mbed714	0:d616ece2d859	979	* For the quality protocol, the Nak means `ask me to send you quality
mbed714	0:d616ece2d859	980	* reports', but if we didn't ask for them, we don't want them.
mbed714	0:d616ece2d859	981	* An option we don't recognize represents the peer asking to
mbed714	0:d616ece2d859	982	* negotiate some option we don't support, so ignore it.
mbed714	0:d616ece2d859	983	*/
mbed714	0:d616ece2d859	984	while (len > CILEN_VOID) {
mbed714	0:d616ece2d859	985	GETCHAR(citype, p);
mbed714	0:d616ece2d859	986	GETCHAR(cilen, p);
mbed714	0:d616ece2d859	987	if (cilen < CILEN_VOID \|\| (len -= cilen) < 0) {
mbed714	0:d616ece2d859	988	goto bad;
mbed714	0:d616ece2d859	989	}
mbed714	0:d616ece2d859	990	next = p + cilen - 2;
mbed714	0:d616ece2d859	991
mbed714	0:d616ece2d859	992	switch (citype) {
mbed714	0:d616ece2d859	993	case CI_MRU:
mbed714	0:d616ece2d859	994	if ((go->neg_mru && go->mru != PPP_DEFMRU)
mbed714	0:d616ece2d859	995	\|\| no.neg_mru \|\| cilen != CILEN_SHORT) {
mbed714	0:d616ece2d859	996	goto bad;
mbed714	0:d616ece2d859	997	}
mbed714	0:d616ece2d859	998	GETSHORT(cishort, p);
mbed714	0:d616ece2d859	999	if (cishort < PPP_DEFMRU) {
mbed714	0:d616ece2d859	1000	try.mru = cishort;
mbed714	0:d616ece2d859	1001	}
mbed714	0:d616ece2d859	1002	break;
mbed714	0:d616ece2d859	1003	case CI_ASYNCMAP:
mbed714	0:d616ece2d859	1004	if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl)
mbed714	0:d616ece2d859	1005	\|\| no.neg_asyncmap \|\| cilen != CILEN_LONG) {
mbed714	0:d616ece2d859	1006	goto bad;
mbed714	0:d616ece2d859	1007	}
mbed714	0:d616ece2d859	1008	break;
mbed714	0:d616ece2d859	1009	case CI_AUTHTYPE:
mbed714	0:d616ece2d859	1010	if (go->neg_chap \|\| no.neg_chap \|\| go->neg_upap \|\| no.neg_upap) {
mbed714	0:d616ece2d859	1011	goto bad;
mbed714	0:d616ece2d859	1012	}
mbed714	0:d616ece2d859	1013	break;
mbed714	0:d616ece2d859	1014	case CI_MAGICNUMBER:
mbed714	0:d616ece2d859	1015	if (go->neg_magicnumber \|\| no.neg_magicnumber \|\|
mbed714	0:d616ece2d859	1016	cilen != CILEN_LONG) {
mbed714	0:d616ece2d859	1017	goto bad;
mbed714	0:d616ece2d859	1018	}
mbed714	0:d616ece2d859	1019	break;
mbed714	0:d616ece2d859	1020	case CI_PCOMPRESSION:
mbed714	0:d616ece2d859	1021	if (go->neg_pcompression \|\| no.neg_pcompression
mbed714	0:d616ece2d859	1022	\|\| cilen != CILEN_VOID) {
mbed714	0:d616ece2d859	1023	goto bad;
mbed714	0:d616ece2d859	1024	}
mbed714	0:d616ece2d859	1025	break;
mbed714	0:d616ece2d859	1026	case CI_ACCOMPRESSION:
mbed714	0:d616ece2d859	1027	if (go->neg_accompression \|\| no.neg_accompression
mbed714	0:d616ece2d859	1028	\|\| cilen != CILEN_VOID) {
mbed714	0:d616ece2d859	1029	goto bad;
mbed714	0:d616ece2d859	1030	}
mbed714	0:d616ece2d859	1031	break;
mbed714	0:d616ece2d859	1032	case CI_QUALITY:
mbed714	0:d616ece2d859	1033	if (go->neg_lqr \|\| no.neg_lqr \|\| cilen != CILEN_LQR) {
mbed714	0:d616ece2d859	1034	goto bad;
mbed714	0:d616ece2d859	1035	}
mbed714	0:d616ece2d859	1036	break;
mbed714	0:d616ece2d859	1037	}
mbed714	0:d616ece2d859	1038	p = next;
mbed714	0:d616ece2d859	1039	}
mbed714	0:d616ece2d859	1040
mbed714	0:d616ece2d859	1041	/* If there is still anything left, this packet is bad. */
mbed714	0:d616ece2d859	1042	if (len != 0) {
mbed714	0:d616ece2d859	1043	goto bad;
mbed714	0:d616ece2d859	1044	}
mbed714	0:d616ece2d859	1045
mbed714	0:d616ece2d859	1046	/*
mbed714	0:d616ece2d859	1047	* OK, the Nak is good. Now we can update state.
mbed714	0:d616ece2d859	1048	*/
mbed714	0:d616ece2d859	1049	if (f->state != LS_OPENED) {
mbed714	0:d616ece2d859	1050	if (looped_back) {
mbed714	0:d616ece2d859	1051	if (++try.numloops >= lcp_loopbackfail) {
mbed714	0:d616ece2d859	1052	LCPDEBUG(LOG_NOTICE, ("Serial line is looped back.\n"));
mbed714	0:d616ece2d859	1053	lcp_close(f->unit, "Loopback detected");
mbed714	0:d616ece2d859	1054	}
mbed714	0:d616ece2d859	1055	} else {
mbed714	0:d616ece2d859	1056	try.numloops = 0;
mbed714	0:d616ece2d859	1057	}
mbed714	0:d616ece2d859	1058	*go = try;
mbed714	0:d616ece2d859	1059	}
mbed714	0:d616ece2d859	1060
mbed714	0:d616ece2d859	1061	return 1;
mbed714	0:d616ece2d859	1062
mbed714	0:d616ece2d859	1063	bad:
mbed714	0:d616ece2d859	1064	LCPDEBUG(LOG_WARNING, ("lcp_nakci: received bad Nak!\n"));
mbed714	0:d616ece2d859	1065	return 0;
mbed714	0:d616ece2d859	1066	}
mbed714	0:d616ece2d859	1067
mbed714	0:d616ece2d859	1068
mbed714	0:d616ece2d859	1069	/*
mbed714	0:d616ece2d859	1070	* lcp_rejci - Peer has Rejected some of our CIs.
mbed714	0:d616ece2d859	1071	* This should not modify any state if the Reject is bad
mbed714	0:d616ece2d859	1072	* or if LCP is in the LS_OPENED state.
mbed714	0:d616ece2d859	1073	*
mbed714	0:d616ece2d859	1074	* Returns:
mbed714	0:d616ece2d859	1075	* 0 - Reject was bad.
mbed714	0:d616ece2d859	1076	* 1 - Reject was good.
mbed714	0:d616ece2d859	1077	*/
mbed714	0:d616ece2d859	1078	static int
mbed714	0:d616ece2d859	1079	lcp_rejci(fsm f, u_char p, int len)
mbed714	0:d616ece2d859	1080	{
mbed714	0:d616ece2d859	1081	lcp_options *go = &lcp_gotoptions[f->unit];
mbed714	0:d616ece2d859	1082	u_char cichar;
mbed714	0:d616ece2d859	1083	u_short cishort;
mbed714	0:d616ece2d859	1084	u32_t cilong;
mbed714	0:d616ece2d859	1085	lcp_options try; /* options to request next time */
mbed714	0:d616ece2d859	1086
mbed714	0:d616ece2d859	1087	try = *go;
mbed714	0:d616ece2d859	1088
mbed714	0:d616ece2d859	1089	/*
mbed714	0:d616ece2d859	1090	* Any Rejected CIs must be in exactly the same order that we sent.
mbed714	0:d616ece2d859	1091	* Check packet length and CI length at each step.
mbed714	0:d616ece2d859	1092	* If we find any deviations, then this packet is bad.
mbed714	0:d616ece2d859	1093	*/
mbed714	0:d616ece2d859	1094	#define REJCIVOID(opt, neg) \
mbed714	0:d616ece2d859	1095	if (go->neg && \
mbed714	0:d616ece2d859	1096	len >= CILEN_VOID && \
mbed714	0:d616ece2d859	1097	p[1] == CILEN_VOID && \
mbed714	0:d616ece2d859	1098	p[0] == opt) { \
mbed714	0:d616ece2d859	1099	len -= CILEN_VOID; \
mbed714	0:d616ece2d859	1100	INCPTR(CILEN_VOID, p); \
mbed714	0:d616ece2d859	1101	try.neg = 0; \
mbed714	0:d616ece2d859	1102	LCPDEBUG(LOG_INFO, ("lcp_rejci: void opt %d rejected\n", opt)); \
mbed714	0:d616ece2d859	1103	}
mbed714	0:d616ece2d859	1104	#define REJCISHORT(opt, neg, val) \
mbed714	0:d616ece2d859	1105	if (go->neg && \
mbed714	0:d616ece2d859	1106	len >= CILEN_SHORT && \
mbed714	0:d616ece2d859	1107	p[1] == CILEN_SHORT && \
mbed714	0:d616ece2d859	1108	p[0] == opt) { \
mbed714	0:d616ece2d859	1109	len -= CILEN_SHORT; \
mbed714	0:d616ece2d859	1110	INCPTR(2, p); \
mbed714	0:d616ece2d859	1111	GETSHORT(cishort, p); \
mbed714	0:d616ece2d859	1112	/* Check rejected value. */ \
mbed714	0:d616ece2d859	1113	if (cishort != val) { \
mbed714	0:d616ece2d859	1114	goto bad; \
mbed714	0:d616ece2d859	1115	} \
mbed714	0:d616ece2d859	1116	try.neg = 0; \
mbed714	0:d616ece2d859	1117	LCPDEBUG(LOG_INFO, ("lcp_rejci: short opt %d rejected\n", opt)); \
mbed714	0:d616ece2d859	1118	}
mbed714	0:d616ece2d859	1119	#define REJCICHAP(opt, neg, val, digest) \
mbed714	0:d616ece2d859	1120	if (go->neg && \
mbed714	0:d616ece2d859	1121	len >= CILEN_CHAP && \
mbed714	0:d616ece2d859	1122	p[1] == CILEN_CHAP && \
mbed714	0:d616ece2d859	1123	p[0] == opt) { \
mbed714	0:d616ece2d859	1124	len -= CILEN_CHAP; \
mbed714	0:d616ece2d859	1125	INCPTR(2, p); \
mbed714	0:d616ece2d859	1126	GETSHORT(cishort, p); \
mbed714	0:d616ece2d859	1127	GETCHAR(cichar, p); \
mbed714	0:d616ece2d859	1128	/* Check rejected value. */ \
mbed714	0:d616ece2d859	1129	if (cishort != val \|\| cichar != digest) { \
mbed714	0:d616ece2d859	1130	goto bad; \
mbed714	0:d616ece2d859	1131	} \
mbed714	0:d616ece2d859	1132	try.neg = 0; \
mbed714	0:d616ece2d859	1133	try.neg_upap = 0; \
mbed714	0:d616ece2d859	1134	LCPDEBUG(LOG_INFO, ("lcp_rejci: chap opt %d rejected\n", opt)); \
mbed714	0:d616ece2d859	1135	}
mbed714	0:d616ece2d859	1136	#define REJCILONG(opt, neg, val) \
mbed714	0:d616ece2d859	1137	if (go->neg && \
mbed714	0:d616ece2d859	1138	len >= CILEN_LONG && \
mbed714	0:d616ece2d859	1139	p[1] == CILEN_LONG && \
mbed714	0:d616ece2d859	1140	p[0] == opt) { \
mbed714	0:d616ece2d859	1141	len -= CILEN_LONG; \
mbed714	0:d616ece2d859	1142	INCPTR(2, p); \
mbed714	0:d616ece2d859	1143	GETLONG(cilong, p); \
mbed714	0:d616ece2d859	1144	/* Check rejected value. */ \
mbed714	0:d616ece2d859	1145	if (cilong != val) { \
mbed714	0:d616ece2d859	1146	goto bad; \
mbed714	0:d616ece2d859	1147	} \
mbed714	0:d616ece2d859	1148	try.neg = 0; \
mbed714	0:d616ece2d859	1149	LCPDEBUG(LOG_INFO, ("lcp_rejci: long opt %d rejected\n", opt)); \
mbed714	0:d616ece2d859	1150	}
mbed714	0:d616ece2d859	1151	#define REJCILQR(opt, neg, val) \
mbed714	0:d616ece2d859	1152	if (go->neg && \
mbed714	0:d616ece2d859	1153	len >= CILEN_LQR && \
mbed714	0:d616ece2d859	1154	p[1] == CILEN_LQR && \
mbed714	0:d616ece2d859	1155	p[0] == opt) { \
mbed714	0:d616ece2d859	1156	len -= CILEN_LQR; \
mbed714	0:d616ece2d859	1157	INCPTR(2, p); \
mbed714	0:d616ece2d859	1158	GETSHORT(cishort, p); \
mbed714	0:d616ece2d859	1159	GETLONG(cilong, p); \
mbed714	0:d616ece2d859	1160	/* Check rejected value. */ \
mbed714	0:d616ece2d859	1161	if (cishort != PPP_LQR \|\| cilong != val) { \
mbed714	0:d616ece2d859	1162	goto bad; \
mbed714	0:d616ece2d859	1163	} \
mbed714	0:d616ece2d859	1164	try.neg = 0; \
mbed714	0:d616ece2d859	1165	LCPDEBUG(LOG_INFO, ("lcp_rejci: LQR opt %d rejected\n", opt)); \
mbed714	0:d616ece2d859	1166	}
mbed714	0:d616ece2d859	1167	#define REJCICBCP(opt, neg, val) \
mbed714	0:d616ece2d859	1168	if (go->neg && \
mbed714	0:d616ece2d859	1169	len >= CILEN_CBCP && \
mbed714	0:d616ece2d859	1170	p[1] == CILEN_CBCP && \
mbed714	0:d616ece2d859	1171	p[0] == opt) { \
mbed714	0:d616ece2d859	1172	len -= CILEN_CBCP; \
mbed714	0:d616ece2d859	1173	INCPTR(2, p); \
mbed714	0:d616ece2d859	1174	GETCHAR(cichar, p); \
mbed714	0:d616ece2d859	1175	/* Check rejected value. */ \
mbed714	0:d616ece2d859	1176	if (cichar != val) { \
mbed714	0:d616ece2d859	1177	goto bad; \
mbed714	0:d616ece2d859	1178	} \
mbed714	0:d616ece2d859	1179	try.neg = 0; \
mbed714	0:d616ece2d859	1180	LCPDEBUG(LOG_INFO, ("lcp_rejci: Callback opt %d rejected\n", opt)); \
mbed714	0:d616ece2d859	1181	}
mbed714	0:d616ece2d859	1182
mbed714	0:d616ece2d859	1183	REJCISHORT(CI_MRU, neg_mru, go->mru);
mbed714	0:d616ece2d859	1184	REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap);
mbed714	0:d616ece2d859	1185	REJCICHAP(CI_AUTHTYPE, neg_chap, PPP_CHAP, go->chap_mdtype);
mbed714	0:d616ece2d859	1186	if (!go->neg_chap) {
mbed714	0:d616ece2d859	1187	REJCISHORT(CI_AUTHTYPE, neg_upap, PPP_PAP);
mbed714	0:d616ece2d859	1188	}
mbed714	0:d616ece2d859	1189	REJCILQR(CI_QUALITY, neg_lqr, go->lqr_period);
mbed714	0:d616ece2d859	1190	REJCICBCP(CI_CALLBACK, neg_cbcp, CBCP_OPT);
mbed714	0:d616ece2d859	1191	REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber);
mbed714	0:d616ece2d859	1192	REJCIVOID(CI_PCOMPRESSION, neg_pcompression);
mbed714	0:d616ece2d859	1193	REJCIVOID(CI_ACCOMPRESSION, neg_accompression);
mbed714	0:d616ece2d859	1194
mbed714	0:d616ece2d859	1195	/*
mbed714	0:d616ece2d859	1196	* If there are any remaining CIs, then this packet is bad.
mbed714	0:d616ece2d859	1197	*/
mbed714	0:d616ece2d859	1198	if (len != 0) {
mbed714	0:d616ece2d859	1199	goto bad;
mbed714	0:d616ece2d859	1200	}
mbed714	0:d616ece2d859	1201	/*
mbed714	0:d616ece2d859	1202	* Now we can update state.
mbed714	0:d616ece2d859	1203	*/
mbed714	0:d616ece2d859	1204	if (f->state != LS_OPENED) {
mbed714	0:d616ece2d859	1205	*go = try;
mbed714	0:d616ece2d859	1206	}
mbed714	0:d616ece2d859	1207	return 1;
mbed714	0:d616ece2d859	1208
mbed714	0:d616ece2d859	1209	bad:
mbed714	0:d616ece2d859	1210	LCPDEBUG(LOG_WARNING, ("lcp_rejci: received bad Reject!\n"));
mbed714	0:d616ece2d859	1211	return 0;
mbed714	0:d616ece2d859	1212	}
mbed714	0:d616ece2d859	1213
mbed714	0:d616ece2d859	1214
mbed714	0:d616ece2d859	1215	/*
mbed714	0:d616ece2d859	1216	* lcp_reqci - Check the peer's requested CIs and send appropriate response.
mbed714	0:d616ece2d859	1217	*
mbed714	0:d616ece2d859	1218	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
mbed714	0:d616ece2d859	1219	* appropriately. If reject_if_disagree is non-zero, doesn't return
mbed714	0:d616ece2d859	1220	* CONFNAK; returns CONFREJ if it can't return CONFACK.
mbed714	0:d616ece2d859	1221	*/
mbed714	0:d616ece2d859	1222	static int
mbed714	0:d616ece2d859	1223	lcp_reqci(fsm *f,
mbed714	0:d616ece2d859	1224	u_char inp, / Requested CIs */
mbed714	0:d616ece2d859	1225	int lenp, / Length of requested CIs */
mbed714	0:d616ece2d859	1226	int reject_if_disagree)
mbed714	0:d616ece2d859	1227	{
mbed714	0:d616ece2d859	1228	lcp_options *go = &lcp_gotoptions[f->unit];
mbed714	0:d616ece2d859	1229	lcp_options *ho = &lcp_hisoptions[f->unit];
mbed714	0:d616ece2d859	1230	lcp_options *ao = &lcp_allowoptions[f->unit];
mbed714	0:d616ece2d859	1231	u_char cip, next; /* Pointer to current and next CIs */
mbed714	0:d616ece2d859	1232	int cilen, citype; /* Parsed len, type */
mbed714	0:d616ece2d859	1233	u_char cichar; /* Parsed char value */
mbed714	0:d616ece2d859	1234	u_short cishort; /* Parsed short value */
mbed714	0:d616ece2d859	1235	u32_t cilong; /* Parse long value */
mbed714	0:d616ece2d859	1236	int rc = CONFACK; /* Final packet return code */
mbed714	0:d616ece2d859	1237	int orc; /* Individual option return code */
mbed714	0:d616ece2d859	1238	u_char p; / Pointer to next char to parse */
mbed714	0:d616ece2d859	1239	u_char rejp; / Pointer to next char in reject frame */
mbed714	0:d616ece2d859	1240	u_char nakp; / Pointer to next char in Nak frame */
mbed714	0:d616ece2d859	1241	int l = lenp; / Length left */
mbed714	0:d616ece2d859	1242	#if TRACELCP > 0
mbed714	0:d616ece2d859	1243	char traceBuf[80];
mbed714	0:d616ece2d859	1244	size_t traceNdx = 0;
mbed714	0:d616ece2d859	1245	#endif
mbed714	0:d616ece2d859	1246
mbed714	0:d616ece2d859	1247	/*
mbed714	0:d616ece2d859	1248	* Reset all his options.
mbed714	0:d616ece2d859	1249	*/
mbed714	0:d616ece2d859	1250	BZERO(ho, sizeof(*ho));
mbed714	0:d616ece2d859	1251
mbed714	0:d616ece2d859	1252	/*
mbed714	0:d616ece2d859	1253	* Process all his options.
mbed714	0:d616ece2d859	1254	*/
mbed714	0:d616ece2d859	1255	next = inp;
mbed714	0:d616ece2d859	1256	nakp = nak_buffer;
mbed714	0:d616ece2d859	1257	rejp = inp;
mbed714	0:d616ece2d859	1258	while (l) {
mbed714	0:d616ece2d859	1259	orc = CONFACK; /* Assume success */
mbed714	0:d616ece2d859	1260	cip = p = next; /* Remember begining of CI */
mbed714	0:d616ece2d859	1261	if (l < 2 \|\| /* Not enough data for CI header or */
mbed714	0:d616ece2d859	1262	p[1] < 2 \|\| /* CI length too small or */
mbed714	0:d616ece2d859	1263	p[1] > l) { /* CI length too big? */
mbed714	0:d616ece2d859	1264	LCPDEBUG(LOG_WARNING, ("lcp_reqci: bad CI length!\n"));
mbed714	0:d616ece2d859	1265	orc = CONFREJ; /* Reject bad CI */
mbed714	0:d616ece2d859	1266	cilen = l; /* Reject till end of packet */
mbed714	0:d616ece2d859	1267	l = 0; /* Don't loop again */
mbed714	0:d616ece2d859	1268	citype = 0;
mbed714	0:d616ece2d859	1269	goto endswitch;
mbed714	0:d616ece2d859	1270	}
mbed714	0:d616ece2d859	1271	GETCHAR(citype, p); /* Parse CI type */
mbed714	0:d616ece2d859	1272	GETCHAR(cilen, p); /* Parse CI length */
mbed714	0:d616ece2d859	1273	l -= cilen; /* Adjust remaining length */
mbed714	0:d616ece2d859	1274	next += cilen; /* Step to next CI */
mbed714	0:d616ece2d859	1275
mbed714	0:d616ece2d859	1276	switch (citype) { /* Check CI type */
mbed714	0:d616ece2d859	1277	case CI_MRU:
mbed714	0:d616ece2d859	1278	if (!ao->neg_mru) { /* Allow option? */
mbed714	0:d616ece2d859	1279	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - not allowed\n"));
mbed714	0:d616ece2d859	1280	orc = CONFREJ; /* Reject CI */
mbed714	0:d616ece2d859	1281	break;
mbed714	0:d616ece2d859	1282	} else if (cilen != CILEN_SHORT) { /* Check CI length */
mbed714	0:d616ece2d859	1283	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - bad length\n"));
mbed714	0:d616ece2d859	1284	orc = CONFREJ; /* Reject CI */
mbed714	0:d616ece2d859	1285	break;
mbed714	0:d616ece2d859	1286	}
mbed714	0:d616ece2d859	1287	GETSHORT(cishort, p); /* Parse MRU */
mbed714	0:d616ece2d859	1288
mbed714	0:d616ece2d859	1289	/*
mbed714	0:d616ece2d859	1290	* He must be able to receive at least our minimum.
mbed714	0:d616ece2d859	1291	* No need to check a maximum. If he sends a large number,
mbed714	0:d616ece2d859	1292	* we'll just ignore it.
mbed714	0:d616ece2d859	1293	*/
mbed714	0:d616ece2d859	1294	if (cishort < PPP_MINMRU) {
mbed714	0:d616ece2d859	1295	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak - MRU too small\n"));
mbed714	0:d616ece2d859	1296	orc = CONFNAK; /* Nak CI */
mbed714	0:d616ece2d859	1297	PUTCHAR(CI_MRU, nakp);
mbed714	0:d616ece2d859	1298	PUTCHAR(CILEN_SHORT, nakp);
mbed714	0:d616ece2d859	1299	PUTSHORT(PPP_MINMRU, nakp); /* Give him a hint */
mbed714	0:d616ece2d859	1300	break;
mbed714	0:d616ece2d859	1301	}
mbed714	0:d616ece2d859	1302	ho->neg_mru = 1; /* Remember he sent MRU */
mbed714	0:d616ece2d859	1303	ho->mru = cishort; /* And remember value */
mbed714	0:d616ece2d859	1304	#if TRACELCP > 0
mbed714	0:d616ece2d859	1305	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MRU %d", cishort);
mbed714	0:d616ece2d859	1306	traceNdx = strlen(traceBuf);
mbed714	0:d616ece2d859	1307	#endif
mbed714	0:d616ece2d859	1308	break;
mbed714	0:d616ece2d859	1309
mbed714	0:d616ece2d859	1310	case CI_ASYNCMAP:
mbed714	0:d616ece2d859	1311	if (!ao->neg_asyncmap) {
mbed714	0:d616ece2d859	1312	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP not allowed\n"));
mbed714	0:d616ece2d859	1313	orc = CONFREJ;
mbed714	0:d616ece2d859	1314	break;
mbed714	0:d616ece2d859	1315	} else if (cilen != CILEN_LONG) {
mbed714	0:d616ece2d859	1316	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP bad length\n"));
mbed714	0:d616ece2d859	1317	orc = CONFREJ;
mbed714	0:d616ece2d859	1318	break;
mbed714	0:d616ece2d859	1319	}
mbed714	0:d616ece2d859	1320	GETLONG(cilong, p);
mbed714	0:d616ece2d859	1321
mbed714	0:d616ece2d859	1322	/*
mbed714	0:d616ece2d859	1323	* Asyncmap must have set at least the bits
mbed714	0:d616ece2d859	1324	* which are set in lcp_allowoptions[unit].asyncmap.
mbed714	0:d616ece2d859	1325	*/
mbed714	0:d616ece2d859	1326	if ((ao->asyncmap & ~cilong) != 0) {
mbed714	0:d616ece2d859	1327	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak ASYNCMAP %lX missing %lX\n",
mbed714	0:d616ece2d859	1328	cilong, ao->asyncmap));
mbed714	0:d616ece2d859	1329	orc = CONFNAK;
mbed714	0:d616ece2d859	1330	PUTCHAR(CI_ASYNCMAP, nakp);
mbed714	0:d616ece2d859	1331	PUTCHAR(CILEN_LONG, nakp);
mbed714	0:d616ece2d859	1332	PUTLONG(ao->asyncmap \| cilong, nakp);
mbed714	0:d616ece2d859	1333	break;
mbed714	0:d616ece2d859	1334	}
mbed714	0:d616ece2d859	1335	ho->neg_asyncmap = 1;
mbed714	0:d616ece2d859	1336	ho->asyncmap = cilong;
mbed714	0:d616ece2d859	1337	#if TRACELCP > 0
mbed714	0:d616ece2d859	1338	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ASYNCMAP=%lX", cilong);
mbed714	0:d616ece2d859	1339	traceNdx = strlen(traceBuf);
mbed714	0:d616ece2d859	1340	#endif
mbed714	0:d616ece2d859	1341	break;
mbed714	0:d616ece2d859	1342
mbed714	0:d616ece2d859	1343	case CI_AUTHTYPE:
mbed714	0:d616ece2d859	1344	if (cilen < CILEN_SHORT) {
mbed714	0:d616ece2d859	1345	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE missing arg\n"));
mbed714	0:d616ece2d859	1346	orc = CONFREJ;
mbed714	0:d616ece2d859	1347	break;
mbed714	0:d616ece2d859	1348	} else if (!(ao->neg_upap \|\| ao->neg_chap)) {
mbed714	0:d616ece2d859	1349	/*
mbed714	0:d616ece2d859	1350	* Reject the option if we're not willing to authenticate.
mbed714	0:d616ece2d859	1351	*/
mbed714	0:d616ece2d859	1352	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE not allowed\n"));
mbed714	0:d616ece2d859	1353	orc = CONFREJ;
mbed714	0:d616ece2d859	1354	break;
mbed714	0:d616ece2d859	1355	}
mbed714	0:d616ece2d859	1356	GETSHORT(cishort, p);
mbed714	0:d616ece2d859	1357
mbed714	0:d616ece2d859	1358	/*
mbed714	0:d616ece2d859	1359	* Authtype must be UPAP or CHAP.
mbed714	0:d616ece2d859	1360	*
mbed714	0:d616ece2d859	1361	* Note: if both ao->neg_upap and ao->neg_chap are set,
mbed714	0:d616ece2d859	1362	* and the peer sends a Configure-Request with two
mbed714	0:d616ece2d859	1363	* authenticate-protocol requests, one for CHAP and one
mbed714	0:d616ece2d859	1364	* for UPAP, then we will reject the second request.
mbed714	0:d616ece2d859	1365	* Whether we end up doing CHAP or UPAP depends then on
mbed714	0:d616ece2d859	1366	* the ordering of the CIs in the peer's Configure-Request.
mbed714	0:d616ece2d859	1367	*/
mbed714	0:d616ece2d859	1368
mbed714	0:d616ece2d859	1369	if (cishort == PPP_PAP) {
mbed714	0:d616ece2d859	1370	if (ho->neg_chap) { /* we've already accepted CHAP */
mbed714	0:d616ece2d859	1371	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP already accepted\n"));
mbed714	0:d616ece2d859	1372	orc = CONFREJ;
mbed714	0:d616ece2d859	1373	break;
mbed714	0:d616ece2d859	1374	} else if (cilen != CILEN_SHORT) {
mbed714	0:d616ece2d859	1375	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP bad len\n"));
mbed714	0:d616ece2d859	1376	orc = CONFREJ;
mbed714	0:d616ece2d859	1377	break;
mbed714	0:d616ece2d859	1378	}
mbed714	0:d616ece2d859	1379	if (!ao->neg_upap) { /* we don't want to do PAP */
mbed714	0:d616ece2d859	1380	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE PAP not allowed\n"));
mbed714	0:d616ece2d859	1381	orc = CONFNAK; /* NAK it and suggest CHAP */
mbed714	0:d616ece2d859	1382	PUTCHAR(CI_AUTHTYPE, nakp);
mbed714	0:d616ece2d859	1383	PUTCHAR(CILEN_CHAP, nakp);
mbed714	0:d616ece2d859	1384	PUTSHORT(PPP_CHAP, nakp);
mbed714	0:d616ece2d859	1385	PUTCHAR(ao->chap_mdtype, nakp);
mbed714	0:d616ece2d859	1386	break;
mbed714	0:d616ece2d859	1387	}
mbed714	0:d616ece2d859	1388	ho->neg_upap = 1;
mbed714	0:d616ece2d859	1389	#if TRACELCP > 0
mbed714	0:d616ece2d859	1390	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PAP (%X)", cishort);
mbed714	0:d616ece2d859	1391	traceNdx = strlen(traceBuf);
mbed714	0:d616ece2d859	1392	#endif
mbed714	0:d616ece2d859	1393	break;
mbed714	0:d616ece2d859	1394	}
mbed714	0:d616ece2d859	1395	if (cishort == PPP_CHAP) {
mbed714	0:d616ece2d859	1396	if (ho->neg_upap) { /* we've already accepted PAP */
mbed714	0:d616ece2d859	1397	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP accepted PAP\n"));
mbed714	0:d616ece2d859	1398	orc = CONFREJ;
mbed714	0:d616ece2d859	1399	break;
mbed714	0:d616ece2d859	1400	} else if (cilen != CILEN_CHAP) {
mbed714	0:d616ece2d859	1401	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP bad len\n"));
mbed714	0:d616ece2d859	1402	orc = CONFREJ;
mbed714	0:d616ece2d859	1403	break;
mbed714	0:d616ece2d859	1404	}
mbed714	0:d616ece2d859	1405	if (!ao->neg_chap) { /* we don't want to do CHAP */
mbed714	0:d616ece2d859	1406	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP not allowed\n"));
mbed714	0:d616ece2d859	1407	orc = CONFNAK; /* NAK it and suggest PAP */
mbed714	0:d616ece2d859	1408	PUTCHAR(CI_AUTHTYPE, nakp);
mbed714	0:d616ece2d859	1409	PUTCHAR(CILEN_SHORT, nakp);
mbed714	0:d616ece2d859	1410	PUTSHORT(PPP_PAP, nakp);
mbed714	0:d616ece2d859	1411	break;
mbed714	0:d616ece2d859	1412	}
mbed714	0:d616ece2d859	1413	GETCHAR(cichar, p); /* get digest type*/
mbed714	0:d616ece2d859	1414	if (cichar != CHAP_DIGEST_MD5
mbed714	0:d616ece2d859	1415	#if MSCHAP_SUPPORT
mbed714	0:d616ece2d859	1416	&& cichar != CHAP_MICROSOFT
mbed714	0:d616ece2d859	1417	#endif
mbed714	0:d616ece2d859	1418	) {
mbed714	0:d616ece2d859	1419	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP digest=%d\n", (int)cichar));
mbed714	0:d616ece2d859	1420	orc = CONFNAK;
mbed714	0:d616ece2d859	1421	PUTCHAR(CI_AUTHTYPE, nakp);
mbed714	0:d616ece2d859	1422	PUTCHAR(CILEN_CHAP, nakp);
mbed714	0:d616ece2d859	1423	PUTSHORT(PPP_CHAP, nakp);
mbed714	0:d616ece2d859	1424	PUTCHAR(ao->chap_mdtype, nakp);
mbed714	0:d616ece2d859	1425	break;
mbed714	0:d616ece2d859	1426	}
mbed714	0:d616ece2d859	1427	#if TRACELCP > 0
mbed714	0:d616ece2d859	1428	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CHAP %X,%d", cishort, (int)cichar);
mbed714	0:d616ece2d859	1429	traceNdx = strlen(traceBuf);
mbed714	0:d616ece2d859	1430	#endif
mbed714	0:d616ece2d859	1431	ho->chap_mdtype = cichar; /* save md type */
mbed714	0:d616ece2d859	1432	ho->neg_chap = 1;
mbed714	0:d616ece2d859	1433	break;
mbed714	0:d616ece2d859	1434	}
mbed714	0:d616ece2d859	1435
mbed714	0:d616ece2d859	1436	/*
mbed714	0:d616ece2d859	1437	* We don't recognize the protocol they're asking for.
mbed714	0:d616ece2d859	1438	* Nak it with something we're willing to do.
mbed714	0:d616ece2d859	1439	* (At this point we know ao->neg_upap \|\| ao->neg_chap.)
mbed714	0:d616ece2d859	1440	*/
mbed714	0:d616ece2d859	1441	orc = CONFNAK;
mbed714	0:d616ece2d859	1442	PUTCHAR(CI_AUTHTYPE, nakp);
mbed714	0:d616ece2d859	1443	if (ao->neg_chap) {
mbed714	0:d616ece2d859	1444	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req CHAP\n", cishort));
mbed714	0:d616ece2d859	1445	PUTCHAR(CILEN_CHAP, nakp);
mbed714	0:d616ece2d859	1446	PUTSHORT(PPP_CHAP, nakp);
mbed714	0:d616ece2d859	1447	PUTCHAR(ao->chap_mdtype, nakp);
mbed714	0:d616ece2d859	1448	} else {
mbed714	0:d616ece2d859	1449	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req PAP\n", cishort));
mbed714	0:d616ece2d859	1450	PUTCHAR(CILEN_SHORT, nakp);
mbed714	0:d616ece2d859	1451	PUTSHORT(PPP_PAP, nakp);
mbed714	0:d616ece2d859	1452	}
mbed714	0:d616ece2d859	1453	break;
mbed714	0:d616ece2d859	1454
mbed714	0:d616ece2d859	1455	case CI_QUALITY:
mbed714	0:d616ece2d859	1456	GETSHORT(cishort, p);
mbed714	0:d616ece2d859	1457	GETLONG(cilong, p);
mbed714	0:d616ece2d859	1458	#if TRACELCP > 0
mbed714	0:d616ece2d859	1459	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " QUALITY (%x %x)", cishort, (unsigned int) cilong);
mbed714	0:d616ece2d859	1460	traceNdx = strlen(traceBuf);
mbed714	0:d616ece2d859	1461	#endif
mbed714	0:d616ece2d859	1462
mbed714	0:d616ece2d859	1463	if (!ao->neg_lqr \|\|
mbed714	0:d616ece2d859	1464	cilen != CILEN_LQR) {
mbed714	0:d616ece2d859	1465	orc = CONFREJ;
mbed714	0:d616ece2d859	1466	break;
mbed714	0:d616ece2d859	1467	}
mbed714	0:d616ece2d859	1468
mbed714	0:d616ece2d859	1469	/*
mbed714	0:d616ece2d859	1470	* Check the protocol and the reporting period.
mbed714	0:d616ece2d859	1471	* XXX When should we Nak this, and what with?
mbed714	0:d616ece2d859	1472	*/
mbed714	0:d616ece2d859	1473	if (cishort != PPP_LQR) {
mbed714	0:d616ece2d859	1474	orc = CONFNAK;
mbed714	0:d616ece2d859	1475	PUTCHAR(CI_QUALITY, nakp);
mbed714	0:d616ece2d859	1476	PUTCHAR(CILEN_LQR, nakp);
mbed714	0:d616ece2d859	1477	PUTSHORT(PPP_LQR, nakp);
mbed714	0:d616ece2d859	1478	PUTLONG(ao->lqr_period, nakp);
mbed714	0:d616ece2d859	1479	break;
mbed714	0:d616ece2d859	1480	}
mbed714	0:d616ece2d859	1481	break;
mbed714	0:d616ece2d859	1482
mbed714	0:d616ece2d859	1483	case CI_MAGICNUMBER:
mbed714	0:d616ece2d859	1484	if (!(ao->neg_magicnumber \|\| go->neg_magicnumber) \|\|
mbed714	0:d616ece2d859	1485	cilen != CILEN_LONG) {
mbed714	0:d616ece2d859	1486	orc = CONFREJ;
mbed714	0:d616ece2d859	1487	break;
mbed714	0:d616ece2d859	1488	}
mbed714	0:d616ece2d859	1489	GETLONG(cilong, p);
mbed714	0:d616ece2d859	1490	#if TRACELCP > 0
mbed714	0:d616ece2d859	1491	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MAGICNUMBER (%lX)", cilong);
mbed714	0:d616ece2d859	1492	traceNdx = strlen(traceBuf);
mbed714	0:d616ece2d859	1493	#endif
mbed714	0:d616ece2d859	1494
mbed714	0:d616ece2d859	1495	/*
mbed714	0:d616ece2d859	1496	* He must have a different magic number.
mbed714	0:d616ece2d859	1497	*/
mbed714	0:d616ece2d859	1498	if (go->neg_magicnumber &&
mbed714	0:d616ece2d859	1499	cilong == go->magicnumber) {
mbed714	0:d616ece2d859	1500	cilong = magic(); /* Don't put magic() inside macro! */
mbed714	0:d616ece2d859	1501	orc = CONFNAK;
mbed714	0:d616ece2d859	1502	PUTCHAR(CI_MAGICNUMBER, nakp);
mbed714	0:d616ece2d859	1503	PUTCHAR(CILEN_LONG, nakp);
mbed714	0:d616ece2d859	1504	PUTLONG(cilong, nakp);
mbed714	0:d616ece2d859	1505	break;
mbed714	0:d616ece2d859	1506	}
mbed714	0:d616ece2d859	1507	ho->neg_magicnumber = 1;
mbed714	0:d616ece2d859	1508	ho->magicnumber = cilong;
mbed714	0:d616ece2d859	1509	break;
mbed714	0:d616ece2d859	1510
mbed714	0:d616ece2d859	1511
mbed714	0:d616ece2d859	1512	case CI_PCOMPRESSION:
mbed714	0:d616ece2d859	1513	#if TRACELCP > 0
mbed714	0:d616ece2d859	1514	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PCOMPRESSION");
mbed714	0:d616ece2d859	1515	traceNdx = strlen(traceBuf);
mbed714	0:d616ece2d859	1516	#endif
mbed714	0:d616ece2d859	1517	if (!ao->neg_pcompression \|\|
mbed714	0:d616ece2d859	1518	cilen != CILEN_VOID) {
mbed714	0:d616ece2d859	1519	orc = CONFREJ;
mbed714	0:d616ece2d859	1520	break;
mbed714	0:d616ece2d859	1521	}
mbed714	0:d616ece2d859	1522	ho->neg_pcompression = 1;
mbed714	0:d616ece2d859	1523	break;
mbed714	0:d616ece2d859	1524
mbed714	0:d616ece2d859	1525	case CI_ACCOMPRESSION:
mbed714	0:d616ece2d859	1526	#if TRACELCP > 0
mbed714	0:d616ece2d859	1527	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ACCOMPRESSION");
mbed714	0:d616ece2d859	1528	traceNdx = strlen(traceBuf);
mbed714	0:d616ece2d859	1529	#endif
mbed714	0:d616ece2d859	1530	if (!ao->neg_accompression \|\|
mbed714	0:d616ece2d859	1531	cilen != CILEN_VOID) {
mbed714	0:d616ece2d859	1532	orc = CONFREJ;
mbed714	0:d616ece2d859	1533	break;
mbed714	0:d616ece2d859	1534	}
mbed714	0:d616ece2d859	1535	ho->neg_accompression = 1;
mbed714	0:d616ece2d859	1536	break;
mbed714	0:d616ece2d859	1537
mbed714	0:d616ece2d859	1538	case CI_MRRU:
mbed714	0:d616ece2d859	1539	#if TRACELCP > 0
mbed714	0:d616ece2d859	1540	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_MRRU");
mbed714	0:d616ece2d859	1541	traceNdx = strlen(traceBuf);
mbed714	0:d616ece2d859	1542	#endif
mbed714	0:d616ece2d859	1543	orc = CONFREJ;
mbed714	0:d616ece2d859	1544	break;
mbed714	0:d616ece2d859	1545
mbed714	0:d616ece2d859	1546	case CI_SSNHF:
mbed714	0:d616ece2d859	1547	#if TRACELCP > 0
mbed714	0:d616ece2d859	1548	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_SSNHF");
mbed714	0:d616ece2d859	1549	traceNdx = strlen(traceBuf);
mbed714	0:d616ece2d859	1550	#endif
mbed714	0:d616ece2d859	1551	orc = CONFREJ;
mbed714	0:d616ece2d859	1552	break;
mbed714	0:d616ece2d859	1553
mbed714	0:d616ece2d859	1554	case CI_EPDISC:
mbed714	0:d616ece2d859	1555	#if TRACELCP > 0
mbed714	0:d616ece2d859	1556	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_EPDISC");
mbed714	0:d616ece2d859	1557	traceNdx = strlen(traceBuf);
mbed714	0:d616ece2d859	1558	#endif
mbed714	0:d616ece2d859	1559	orc = CONFREJ;
mbed714	0:d616ece2d859	1560	break;
mbed714	0:d616ece2d859	1561
mbed714	0:d616ece2d859	1562	default:
mbed714	0:d616ece2d859	1563	#if TRACELCP
mbed714	0:d616ece2d859	1564	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " unknown %d", citype);
mbed714	0:d616ece2d859	1565	traceNdx = strlen(traceBuf);
mbed714	0:d616ece2d859	1566	#endif
mbed714	0:d616ece2d859	1567	orc = CONFREJ;
mbed714	0:d616ece2d859	1568	break;
mbed714	0:d616ece2d859	1569	}
mbed714	0:d616ece2d859	1570
mbed714	0:d616ece2d859	1571	endswitch:
mbed714	0:d616ece2d859	1572	#if TRACELCP
mbed714	0:d616ece2d859	1573	if (traceNdx >= 80 - 32) {
mbed714	0:d616ece2d859	1574	LCPDEBUG(LOG_INFO, ("lcp_reqci: rcvd%s\n", traceBuf));
mbed714	0:d616ece2d859	1575	traceNdx = 0;
mbed714	0:d616ece2d859	1576	}
mbed714	0:d616ece2d859	1577	#endif
mbed714	0:d616ece2d859	1578	if (orc == CONFACK && /* Good CI */
mbed714	0:d616ece2d859	1579	rc != CONFACK) { /* but prior CI wasnt? */
mbed714	0:d616ece2d859	1580	continue; /* Don't send this one */
mbed714	0:d616ece2d859	1581	}
mbed714	0:d616ece2d859	1582
mbed714	0:d616ece2d859	1583	if (orc == CONFNAK) { /* Nak this CI? */
mbed714	0:d616ece2d859	1584	if (reject_if_disagree /* Getting fed up with sending NAKs? */
mbed714	0:d616ece2d859	1585	&& citype != CI_MAGICNUMBER) {
mbed714	0:d616ece2d859	1586	orc = CONFREJ; /* Get tough if so */
mbed714	0:d616ece2d859	1587	} else {
mbed714	0:d616ece2d859	1588	if (rc == CONFREJ) { /* Rejecting prior CI? */
mbed714	0:d616ece2d859	1589	continue; /* Don't send this one */
mbed714	0:d616ece2d859	1590	}
mbed714	0:d616ece2d859	1591	rc = CONFNAK;
mbed714	0:d616ece2d859	1592	}
mbed714	0:d616ece2d859	1593	}
mbed714	0:d616ece2d859	1594	if (orc == CONFREJ) { /* Reject this CI */
mbed714	0:d616ece2d859	1595	rc = CONFREJ;
mbed714	0:d616ece2d859	1596	if (cip != rejp) { /* Need to move rejected CI? */
mbed714	0:d616ece2d859	1597	BCOPY(cip, rejp, cilen); /* Move it */
mbed714	0:d616ece2d859	1598	}
mbed714	0:d616ece2d859	1599	INCPTR(cilen, rejp); /* Update output pointer */
mbed714	0:d616ece2d859	1600	}
mbed714	0:d616ece2d859	1601	}
mbed714	0:d616ece2d859	1602
mbed714	0:d616ece2d859	1603	/*
mbed714	0:d616ece2d859	1604	* If we wanted to send additional NAKs (for unsent CIs), the
mbed714	0:d616ece2d859	1605	* code would go here. The extra NAKs would go at *nakp.
mbed714	0:d616ece2d859	1606	* At present there are no cases where we want to ask the
mbed714	0:d616ece2d859	1607	* peer to negotiate an option.
mbed714	0:d616ece2d859	1608	*/
mbed714	0:d616ece2d859	1609
mbed714	0:d616ece2d859	1610	switch (rc) {
mbed714	0:d616ece2d859	1611	case CONFACK:
mbed714	0:d616ece2d859	1612	*lenp = (int)(next - inp);
mbed714	0:d616ece2d859	1613	break;
mbed714	0:d616ece2d859	1614	case CONFNAK:
mbed714	0:d616ece2d859	1615	/*
mbed714	0:d616ece2d859	1616	* Copy the Nak'd options from the nak_buffer to the caller's buffer.
mbed714	0:d616ece2d859	1617	*/
mbed714	0:d616ece2d859	1618	*lenp = (int)(nakp - nak_buffer);
mbed714	0:d616ece2d859	1619	BCOPY(nak_buffer, inp, *lenp);
mbed714	0:d616ece2d859	1620	break;
mbed714	0:d616ece2d859	1621	case CONFREJ:
mbed714	0:d616ece2d859	1622	*lenp = (int)(rejp - inp);
mbed714	0:d616ece2d859	1623	break;
mbed714	0:d616ece2d859	1624	}
mbed714	0:d616ece2d859	1625
mbed714	0:d616ece2d859	1626	#if TRACELCP > 0
mbed714	0:d616ece2d859	1627	if (traceNdx > 0) {
mbed714	0:d616ece2d859	1628	LCPDEBUG(LOG_INFO, ("lcp_reqci: %s\n", traceBuf));
mbed714	0:d616ece2d859	1629	}
mbed714	0:d616ece2d859	1630	#endif
mbed714	0:d616ece2d859	1631	LCPDEBUG(LOG_INFO, ("lcp_reqci: returning CONF%s.\n", CODENAME(rc)));
mbed714	0:d616ece2d859	1632	return (rc); /* Return final code */
mbed714	0:d616ece2d859	1633	}
mbed714	0:d616ece2d859	1634
mbed714	0:d616ece2d859	1635
mbed714	0:d616ece2d859	1636	/*
mbed714	0:d616ece2d859	1637	* lcp_up - LCP has come UP.
mbed714	0:d616ece2d859	1638	*/
mbed714	0:d616ece2d859	1639	static void
mbed714	0:d616ece2d859	1640	lcp_up(fsm *f)
mbed714	0:d616ece2d859	1641	{
mbed714	0:d616ece2d859	1642	lcp_options *wo = &lcp_wantoptions[f->unit];
mbed714	0:d616ece2d859	1643	lcp_options *ho = &lcp_hisoptions[f->unit];
mbed714	0:d616ece2d859	1644	lcp_options *go = &lcp_gotoptions[f->unit];
mbed714	0:d616ece2d859	1645	lcp_options *ao = &lcp_allowoptions[f->unit];
mbed714	0:d616ece2d859	1646
mbed714	0:d616ece2d859	1647	if (!go->neg_magicnumber) {
mbed714	0:d616ece2d859	1648	go->magicnumber = 0;
mbed714	0:d616ece2d859	1649	}
mbed714	0:d616ece2d859	1650	if (!ho->neg_magicnumber) {
mbed714	0:d616ece2d859	1651	ho->magicnumber = 0;
mbed714	0:d616ece2d859	1652	}
mbed714	0:d616ece2d859	1653
mbed714	0:d616ece2d859	1654	/*
mbed714	0:d616ece2d859	1655	* Set our MTU to the smaller of the MTU we wanted and
mbed714	0:d616ece2d859	1656	* the MRU our peer wanted. If we negotiated an MRU,
mbed714	0:d616ece2d859	1657	* set our MRU to the larger of value we wanted and
mbed714	0:d616ece2d859	1658	* the value we got in the negotiation.
mbed714	0:d616ece2d859	1659	*/
mbed714	0:d616ece2d859	1660	ppp_send_config(f->unit, LWIP_MIN(ao->mru, (ho->neg_mru? ho->mru: PPP_MRU)),
mbed714	0:d616ece2d859	1661	(ho->neg_asyncmap? ho->asyncmap: 0xffffffffl),
mbed714	0:d616ece2d859	1662	ho->neg_pcompression, ho->neg_accompression);
mbed714	0:d616ece2d859	1663	/*
mbed714	0:d616ece2d859	1664	* If the asyncmap hasn't been negotiated, we really should
mbed714	0:d616ece2d859	1665	* set the receive asyncmap to ffffffff, but we set it to 0
mbed714	0:d616ece2d859	1666	* for backwards contemptibility.
mbed714	0:d616ece2d859	1667	*/
mbed714	0:d616ece2d859	1668	ppp_recv_config(f->unit, (go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU),
mbed714	0:d616ece2d859	1669	(go->neg_asyncmap? go->asyncmap: 0x00000000),
mbed714	0:d616ece2d859	1670	go->neg_pcompression, go->neg_accompression);
mbed714	0:d616ece2d859	1671
mbed714	0:d616ece2d859	1672	if (ho->neg_mru) {
mbed714	0:d616ece2d859	1673	peer_mru[f->unit] = ho->mru;
mbed714	0:d616ece2d859	1674	}
mbed714	0:d616ece2d859	1675
mbed714	0:d616ece2d859	1676	lcp_echo_lowerup(f->unit); /* Enable echo messages */
mbed714	0:d616ece2d859	1677
mbed714	0:d616ece2d859	1678	link_established(f->unit); /* The link is up; authenticate now */
mbed714	0:d616ece2d859	1679	}
mbed714	0:d616ece2d859	1680
mbed714	0:d616ece2d859	1681
mbed714	0:d616ece2d859	1682	/*
mbed714	0:d616ece2d859	1683	* lcp_down - LCP has gone DOWN.
mbed714	0:d616ece2d859	1684	*
mbed714	0:d616ece2d859	1685	* Alert other protocols.
mbed714	0:d616ece2d859	1686	*/
mbed714	0:d616ece2d859	1687	static void
mbed714	0:d616ece2d859	1688	lcp_down(fsm *f)
mbed714	0:d616ece2d859	1689	{
mbed714	0:d616ece2d859	1690	lcp_options *go = &lcp_gotoptions[f->unit];
mbed714	0:d616ece2d859	1691
mbed714	0:d616ece2d859	1692	lcp_echo_lowerdown(f->unit);
mbed714	0:d616ece2d859	1693
mbed714	0:d616ece2d859	1694	link_down(f->unit);
mbed714	0:d616ece2d859	1695
mbed714	0:d616ece2d859	1696	ppp_send_config(f->unit, PPP_MRU, 0xffffffffl, 0, 0);
mbed714	0:d616ece2d859	1697	ppp_recv_config(f->unit, PPP_MRU,
mbed714	0:d616ece2d859	1698	(go->neg_asyncmap? go->asyncmap: 0x00000000),
mbed714	0:d616ece2d859	1699	go->neg_pcompression, go->neg_accompression);
mbed714	0:d616ece2d859	1700	peer_mru[f->unit] = PPP_MRU;
mbed714	0:d616ece2d859	1701	}
mbed714	0:d616ece2d859	1702
mbed714	0:d616ece2d859	1703
mbed714	0:d616ece2d859	1704	/*
mbed714	0:d616ece2d859	1705	* lcp_starting - LCP needs the lower layer up.
mbed714	0:d616ece2d859	1706	*/
mbed714	0:d616ece2d859	1707	static void
mbed714	0:d616ece2d859	1708	lcp_starting(fsm *f)
mbed714	0:d616ece2d859	1709	{
mbed714	0:d616ece2d859	1710	link_required(f->unit); /* lwip: currently does nothing */
mbed714	0:d616ece2d859	1711	}
mbed714	0:d616ece2d859	1712
mbed714	0:d616ece2d859	1713
mbed714	0:d616ece2d859	1714	/*
mbed714	0:d616ece2d859	1715	* lcp_finished - LCP has finished with the lower layer.
mbed714	0:d616ece2d859	1716	*/
mbed714	0:d616ece2d859	1717	static void
mbed714	0:d616ece2d859	1718	lcp_finished(fsm *f)
mbed714	0:d616ece2d859	1719	{
mbed714	0:d616ece2d859	1720	link_terminated(f->unit); /* we are finished with the link */
mbed714	0:d616ece2d859	1721	}
mbed714	0:d616ece2d859	1722
mbed714	0:d616ece2d859	1723
mbed714	0:d616ece2d859	1724	#if PPP_ADDITIONAL_CALLBACKS
mbed714	0:d616ece2d859	1725	/*
mbed714	0:d616ece2d859	1726	* print_string - print a readable representation of a string using
mbed714	0:d616ece2d859	1727	* printer.
mbed714	0:d616ece2d859	1728	*/
mbed714	0:d616ece2d859	1729	static void
mbed714	0:d616ece2d859	1730	print_string( char p, int len, void (printer) (void , char , ...), void *arg)
mbed714	0:d616ece2d859	1731	{
mbed714	0:d616ece2d859	1732	int c;
mbed714	0:d616ece2d859	1733
mbed714	0:d616ece2d859	1734	printer(arg, "\"");
mbed714	0:d616ece2d859	1735	for (; len > 0; --len) {
mbed714	0:d616ece2d859	1736	c = *p++;
mbed714	0:d616ece2d859	1737	if (' ' <= c && c <= '~') {
mbed714	0:d616ece2d859	1738	if (c == '\\' \|\| c == '"') {
mbed714	0:d616ece2d859	1739	printer(arg, "\\");
mbed714	0:d616ece2d859	1740	}
mbed714	0:d616ece2d859	1741	printer(arg, "%c", c);
mbed714	0:d616ece2d859	1742	} else {
mbed714	0:d616ece2d859	1743	switch (c) {
mbed714	0:d616ece2d859	1744	case '\n':
mbed714	0:d616ece2d859	1745	printer(arg, "\\n");
mbed714	0:d616ece2d859	1746	break;
mbed714	0:d616ece2d859	1747	case '\r':
mbed714	0:d616ece2d859	1748	printer(arg, "\\r");
mbed714	0:d616ece2d859	1749	break;
mbed714	0:d616ece2d859	1750	case '\t':
mbed714	0:d616ece2d859	1751	printer(arg, "\\t");
mbed714	0:d616ece2d859	1752	break;
mbed714	0:d616ece2d859	1753	default:
mbed714	0:d616ece2d859	1754	printer(arg, "\\%.3o", c);
mbed714	0:d616ece2d859	1755	}
mbed714	0:d616ece2d859	1756	}
mbed714	0:d616ece2d859	1757	}
mbed714	0:d616ece2d859	1758	printer(arg, "\"");
mbed714	0:d616ece2d859	1759	}
mbed714	0:d616ece2d859	1760
mbed714	0:d616ece2d859	1761
mbed714	0:d616ece2d859	1762	/*
mbed714	0:d616ece2d859	1763	* lcp_printpkt - print the contents of an LCP packet.
mbed714	0:d616ece2d859	1764	*/
mbed714	0:d616ece2d859	1765	static char *lcp_codenames[] = {
mbed714	0:d616ece2d859	1766	"ConfReq", "ConfAck", "ConfNak", "ConfRej",
mbed714	0:d616ece2d859	1767	"TermReq", "TermAck", "CodeRej", "ProtRej",
mbed714	0:d616ece2d859	1768	"EchoReq", "EchoRep", "DiscReq"
mbed714	0:d616ece2d859	1769	};
mbed714	0:d616ece2d859	1770
mbed714	0:d616ece2d859	1771	static int
mbed714	0:d616ece2d859	1772	lcp_printpkt( u_char p, int plen, void (printer) (void , char , ...), void *arg)
mbed714	0:d616ece2d859	1773	{
mbed714	0:d616ece2d859	1774	int code, id, len, olen;
mbed714	0:d616ece2d859	1775	u_char pstart, optend;
mbed714	0:d616ece2d859	1776	u_short cishort;
mbed714	0:d616ece2d859	1777	u32_t cilong;
mbed714	0:d616ece2d859	1778
mbed714	0:d616ece2d859	1779	if (plen < HEADERLEN) {
mbed714	0:d616ece2d859	1780	return 0;
mbed714	0:d616ece2d859	1781	}
mbed714	0:d616ece2d859	1782	pstart = p;
mbed714	0:d616ece2d859	1783	GETCHAR(code, p);
mbed714	0:d616ece2d859	1784	GETCHAR(id, p);
mbed714	0:d616ece2d859	1785	GETSHORT(len, p);
mbed714	0:d616ece2d859	1786	if (len < HEADERLEN \|\| len > plen) {
mbed714	0:d616ece2d859	1787	return 0;
mbed714	0:d616ece2d859	1788	}
mbed714	0:d616ece2d859	1789
mbed714	0:d616ece2d859	1790	if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *)) {
mbed714	0:d616ece2d859	1791	printer(arg, " %s", lcp_codenames[code-1]);
mbed714	0:d616ece2d859	1792	} else {
mbed714	0:d616ece2d859	1793	printer(arg, " code=0x%x", code);
mbed714	0:d616ece2d859	1794	}
mbed714	0:d616ece2d859	1795	printer(arg, " id=0x%x", id);
mbed714	0:d616ece2d859	1796	len -= HEADERLEN;
mbed714	0:d616ece2d859	1797	switch (code) {
mbed714	0:d616ece2d859	1798	case CONFREQ:
mbed714	0:d616ece2d859	1799	case CONFACK:
mbed714	0:d616ece2d859	1800	case CONFNAK:
mbed714	0:d616ece2d859	1801	case CONFREJ:
mbed714	0:d616ece2d859	1802	/* print option list */
mbed714	0:d616ece2d859	1803	while (len >= 2) {
mbed714	0:d616ece2d859	1804	GETCHAR(code, p);
mbed714	0:d616ece2d859	1805	GETCHAR(olen, p);
mbed714	0:d616ece2d859	1806	p -= 2;
mbed714	0:d616ece2d859	1807	if (olen < 2 \|\| olen > len) {
mbed714	0:d616ece2d859	1808	break;
mbed714	0:d616ece2d859	1809	}
mbed714	0:d616ece2d859	1810	printer(arg, " <");
mbed714	0:d616ece2d859	1811	len -= olen;
mbed714	0:d616ece2d859	1812	optend = p + olen;
mbed714	0:d616ece2d859	1813	switch (code) {
mbed714	0:d616ece2d859	1814	case CI_MRU:
mbed714	0:d616ece2d859	1815	if (olen == CILEN_SHORT) {
mbed714	0:d616ece2d859	1816	p += 2;
mbed714	0:d616ece2d859	1817	GETSHORT(cishort, p);
mbed714	0:d616ece2d859	1818	printer(arg, "mru %d", cishort);
mbed714	0:d616ece2d859	1819	}
mbed714	0:d616ece2d859	1820	break;
mbed714	0:d616ece2d859	1821	case CI_ASYNCMAP:
mbed714	0:d616ece2d859	1822	if (olen == CILEN_LONG) {
mbed714	0:d616ece2d859	1823	p += 2;
mbed714	0:d616ece2d859	1824	GETLONG(cilong, p);
mbed714	0:d616ece2d859	1825	printer(arg, "asyncmap 0x%lx", cilong);
mbed714	0:d616ece2d859	1826	}
mbed714	0:d616ece2d859	1827	break;
mbed714	0:d616ece2d859	1828	case CI_AUTHTYPE:
mbed714	0:d616ece2d859	1829	if (olen >= CILEN_SHORT) {
mbed714	0:d616ece2d859	1830	p += 2;
mbed714	0:d616ece2d859	1831	printer(arg, "auth ");
mbed714	0:d616ece2d859	1832	GETSHORT(cishort, p);
mbed714	0:d616ece2d859	1833	switch (cishort) {
mbed714	0:d616ece2d859	1834	case PPP_PAP:
mbed714	0:d616ece2d859	1835	printer(arg, "pap");
mbed714	0:d616ece2d859	1836	break;
mbed714	0:d616ece2d859	1837	case PPP_CHAP:
mbed714	0:d616ece2d859	1838	printer(arg, "chap");
mbed714	0:d616ece2d859	1839	break;
mbed714	0:d616ece2d859	1840	default:
mbed714	0:d616ece2d859	1841	printer(arg, "0x%x", cishort);
mbed714	0:d616ece2d859	1842	}
mbed714	0:d616ece2d859	1843	}
mbed714	0:d616ece2d859	1844	break;
mbed714	0:d616ece2d859	1845	case CI_QUALITY:
mbed714	0:d616ece2d859	1846	if (olen >= CILEN_SHORT) {
mbed714	0:d616ece2d859	1847	p += 2;
mbed714	0:d616ece2d859	1848	printer(arg, "quality ");
mbed714	0:d616ece2d859	1849	GETSHORT(cishort, p);
mbed714	0:d616ece2d859	1850	switch (cishort) {
mbed714	0:d616ece2d859	1851	case PPP_LQR:
mbed714	0:d616ece2d859	1852	printer(arg, "lqr");
mbed714	0:d616ece2d859	1853	break;
mbed714	0:d616ece2d859	1854	default:
mbed714	0:d616ece2d859	1855	printer(arg, "0x%x", cishort);
mbed714	0:d616ece2d859	1856	}
mbed714	0:d616ece2d859	1857	}
mbed714	0:d616ece2d859	1858	break;
mbed714	0:d616ece2d859	1859	case CI_CALLBACK:
mbed714	0:d616ece2d859	1860	if (olen >= CILEN_CHAR) {
mbed714	0:d616ece2d859	1861	p += 2;
mbed714	0:d616ece2d859	1862	printer(arg, "callback ");
mbed714	0:d616ece2d859	1863	GETSHORT(cishort, p);
mbed714	0:d616ece2d859	1864	switch (cishort) {
mbed714	0:d616ece2d859	1865	case CBCP_OPT:
mbed714	0:d616ece2d859	1866	printer(arg, "CBCP");
mbed714	0:d616ece2d859	1867	break;
mbed714	0:d616ece2d859	1868	default:
mbed714	0:d616ece2d859	1869	printer(arg, "0x%x", cishort);
mbed714	0:d616ece2d859	1870	}
mbed714	0:d616ece2d859	1871	}
mbed714	0:d616ece2d859	1872	break;
mbed714	0:d616ece2d859	1873	case CI_MAGICNUMBER:
mbed714	0:d616ece2d859	1874	if (olen == CILEN_LONG) {
mbed714	0:d616ece2d859	1875	p += 2;
mbed714	0:d616ece2d859	1876	GETLONG(cilong, p);
mbed714	0:d616ece2d859	1877	printer(arg, "magic 0x%x", cilong);
mbed714	0:d616ece2d859	1878	}
mbed714	0:d616ece2d859	1879	break;
mbed714	0:d616ece2d859	1880	case CI_PCOMPRESSION:
mbed714	0:d616ece2d859	1881	if (olen == CILEN_VOID) {
mbed714	0:d616ece2d859	1882	p += 2;
mbed714	0:d616ece2d859	1883	printer(arg, "pcomp");
mbed714	0:d616ece2d859	1884	}
mbed714	0:d616ece2d859	1885	break;
mbed714	0:d616ece2d859	1886	case CI_ACCOMPRESSION:
mbed714	0:d616ece2d859	1887	if (olen == CILEN_VOID) {
mbed714	0:d616ece2d859	1888	p += 2;
mbed714	0:d616ece2d859	1889	printer(arg, "accomp");
mbed714	0:d616ece2d859	1890	}
mbed714	0:d616ece2d859	1891	break;
mbed714	0:d616ece2d859	1892	}
mbed714	0:d616ece2d859	1893	while (p < optend) {
mbed714	0:d616ece2d859	1894	GETCHAR(code, p);
mbed714	0:d616ece2d859	1895	printer(arg, " %.2x", code);
mbed714	0:d616ece2d859	1896	}
mbed714	0:d616ece2d859	1897	printer(arg, ">");
mbed714	0:d616ece2d859	1898	}
mbed714	0:d616ece2d859	1899	break;
mbed714	0:d616ece2d859	1900
mbed714	0:d616ece2d859	1901	case TERMACK:
mbed714	0:d616ece2d859	1902	case TERMREQ:
mbed714	0:d616ece2d859	1903	if (len > 0 && p >= ' ' && p < 0x7f) {
mbed714	0:d616ece2d859	1904	printer(arg, " ");
mbed714	0:d616ece2d859	1905	print_string((char*)p, len, printer, arg);
mbed714	0:d616ece2d859	1906	p += len;
mbed714	0:d616ece2d859	1907	len = 0;
mbed714	0:d616ece2d859	1908	}
mbed714	0:d616ece2d859	1909	break;
mbed714	0:d616ece2d859	1910
mbed714	0:d616ece2d859	1911	case ECHOREQ:
mbed714	0:d616ece2d859	1912	case ECHOREP:
mbed714	0:d616ece2d859	1913	case DISCREQ:
mbed714	0:d616ece2d859	1914	if (len >= 4) {
mbed714	0:d616ece2d859	1915	GETLONG(cilong, p);
mbed714	0:d616ece2d859	1916	printer(arg, " magic=0x%x", cilong);
mbed714	0:d616ece2d859	1917	p += 4;
mbed714	0:d616ece2d859	1918	len -= 4;
mbed714	0:d616ece2d859	1919	}
mbed714	0:d616ece2d859	1920	break;
mbed714	0:d616ece2d859	1921	}
mbed714	0:d616ece2d859	1922
mbed714	0:d616ece2d859	1923	/* print the rest of the bytes in the packet */
mbed714	0:d616ece2d859	1924	for (; len > 0; --len) {
mbed714	0:d616ece2d859	1925	GETCHAR(code, p);
mbed714	0:d616ece2d859	1926	printer(arg, " %.2x", code);
mbed714	0:d616ece2d859	1927	}
mbed714	0:d616ece2d859	1928
mbed714	0:d616ece2d859	1929	return (int)(p - pstart);
mbed714	0:d616ece2d859	1930	}
mbed714	0:d616ece2d859	1931	#endif /* PPP_ADDITIONAL_CALLBACKS */
mbed714	0:d616ece2d859	1932
mbed714	0:d616ece2d859	1933	/*
mbed714	0:d616ece2d859	1934	* Time to shut down the link because there is nothing out there.
mbed714	0:d616ece2d859	1935	*/
mbed714	0:d616ece2d859	1936	static void
mbed714	0:d616ece2d859	1937	LcpLinkFailure (fsm *f)
mbed714	0:d616ece2d859	1938	{
mbed714	0:d616ece2d859	1939	if (f->state == LS_OPENED) {
mbed714	0:d616ece2d859	1940	LCPDEBUG(LOG_INFO, ("No response to %d echo-requests\n", lcp_echos_pending));
mbed714	0:d616ece2d859	1941	LCPDEBUG(LOG_NOTICE, ("Serial link appears to be disconnected.\n"));
mbed714	0:d616ece2d859	1942	lcp_close(f->unit, "Peer not responding");
mbed714	0:d616ece2d859	1943	}
mbed714	0:d616ece2d859	1944	}
mbed714	0:d616ece2d859	1945
mbed714	0:d616ece2d859	1946	/*
mbed714	0:d616ece2d859	1947	* Timer expired for the LCP echo requests from this process.
mbed714	0:d616ece2d859	1948	*/
mbed714	0:d616ece2d859	1949	static void
mbed714	0:d616ece2d859	1950	LcpEchoCheck (fsm *f)
mbed714	0:d616ece2d859	1951	{
mbed714	0:d616ece2d859	1952	LcpSendEchoRequest (f);
mbed714	0:d616ece2d859	1953
mbed714	0:d616ece2d859	1954	/*
mbed714	0:d616ece2d859	1955	* Start the timer for the next interval.
mbed714	0:d616ece2d859	1956	*/
mbed714	0:d616ece2d859	1957	LWIP_ASSERT("lcp_echo_timer_running == 0", lcp_echo_timer_running == 0);
mbed714	0:d616ece2d859	1958
mbed714	0:d616ece2d859	1959	TIMEOUT (LcpEchoTimeout, f, lcp_echo_interval);
mbed714	0:d616ece2d859	1960	lcp_echo_timer_running = 1;
mbed714	0:d616ece2d859	1961	}
mbed714	0:d616ece2d859	1962
mbed714	0:d616ece2d859	1963	/*
mbed714	0:d616ece2d859	1964	* LcpEchoTimeout - Timer expired on the LCP echo
mbed714	0:d616ece2d859	1965	*/
mbed714	0:d616ece2d859	1966	static void
mbed714	0:d616ece2d859	1967	LcpEchoTimeout (void *arg)
mbed714	0:d616ece2d859	1968	{
mbed714	0:d616ece2d859	1969	if (lcp_echo_timer_running != 0) {
mbed714	0:d616ece2d859	1970	lcp_echo_timer_running = 0;
mbed714	0:d616ece2d859	1971	LcpEchoCheck ((fsm *) arg);
mbed714	0:d616ece2d859	1972	}
mbed714	0:d616ece2d859	1973	}
mbed714	0:d616ece2d859	1974
mbed714	0:d616ece2d859	1975	/*
mbed714	0:d616ece2d859	1976	* LcpEchoReply - LCP has received a reply to the echo
mbed714	0:d616ece2d859	1977	*/
mbed714	0:d616ece2d859	1978	static void
mbed714	0:d616ece2d859	1979	lcp_received_echo_reply (fsm f, int id, u_char inp, int len)
mbed714	0:d616ece2d859	1980	{
mbed714	0:d616ece2d859	1981	u32_t magic;
mbed714	0:d616ece2d859	1982
mbed714	0:d616ece2d859	1983	LWIP_UNUSED_ARG(id);
mbed714	0:d616ece2d859	1984
mbed714	0:d616ece2d859	1985	/* Check the magic number - don't count replies from ourselves. */
mbed714	0:d616ece2d859	1986	if (len < 4) {
mbed714	0:d616ece2d859	1987	LCPDEBUG(LOG_WARNING, ("lcp: received short Echo-Reply, length %d\n", len));
mbed714	0:d616ece2d859	1988	return;
mbed714	0:d616ece2d859	1989	}
mbed714	0:d616ece2d859	1990	GETLONG(magic, inp);
mbed714	0:d616ece2d859	1991	if (lcp_gotoptions[f->unit].neg_magicnumber && magic == lcp_gotoptions[f->unit].magicnumber) {
mbed714	0:d616ece2d859	1992	LCPDEBUG(LOG_WARNING, ("appear to have received our own echo-reply!\n"));
mbed714	0:d616ece2d859	1993	return;
mbed714	0:d616ece2d859	1994	}
mbed714	0:d616ece2d859	1995
mbed714	0:d616ece2d859	1996	/* Reset the number of outstanding echo frames */
mbed714	0:d616ece2d859	1997	lcp_echos_pending = 0;
mbed714	0:d616ece2d859	1998	}
mbed714	0:d616ece2d859	1999
mbed714	0:d616ece2d859	2000	/*
mbed714	0:d616ece2d859	2001	* LcpSendEchoRequest - Send an echo request frame to the peer
mbed714	0:d616ece2d859	2002	*/
mbed714	0:d616ece2d859	2003	static void
mbed714	0:d616ece2d859	2004	LcpSendEchoRequest (fsm *f)
mbed714	0:d616ece2d859	2005	{
mbed714	0:d616ece2d859	2006	u32_t lcp_magic;
mbed714	0:d616ece2d859	2007	u_char pkt[4], *pktp;
mbed714	0:d616ece2d859	2008
mbed714	0:d616ece2d859	2009	/*
mbed714	0:d616ece2d859	2010	* Detect the failure of the peer at this point.
mbed714	0:d616ece2d859	2011	*/
mbed714	0:d616ece2d859	2012	if (lcp_echo_fails != 0) {
mbed714	0:d616ece2d859	2013	if (lcp_echos_pending >= lcp_echo_fails) {
mbed714	0:d616ece2d859	2014	LcpLinkFailure(f);
mbed714	0:d616ece2d859	2015	lcp_echos_pending = 0;
mbed714	0:d616ece2d859	2016	}
mbed714	0:d616ece2d859	2017	}
mbed714	0:d616ece2d859	2018
mbed714	0:d616ece2d859	2019	/*
mbed714	0:d616ece2d859	2020	* Make and send the echo request frame.
mbed714	0:d616ece2d859	2021	*/
mbed714	0:d616ece2d859	2022	if (f->state == LS_OPENED) {
mbed714	0:d616ece2d859	2023	lcp_magic = lcp_gotoptions[f->unit].magicnumber;
mbed714	0:d616ece2d859	2024	pktp = pkt;
mbed714	0:d616ece2d859	2025	PUTLONG(lcp_magic, pktp);
mbed714	0:d616ece2d859	2026	fsm_sdata(f, ECHOREQ, (u_char)(lcp_echo_number++ & 0xFF), pkt, (int)(pktp - pkt));
mbed714	0:d616ece2d859	2027	++lcp_echos_pending;
mbed714	0:d616ece2d859	2028	}
mbed714	0:d616ece2d859	2029	}
mbed714	0:d616ece2d859	2030
mbed714	0:d616ece2d859	2031	/*
mbed714	0:d616ece2d859	2032	* lcp_echo_lowerup - Start the timer for the LCP frame
mbed714	0:d616ece2d859	2033	*/
mbed714	0:d616ece2d859	2034
mbed714	0:d616ece2d859	2035	static void
mbed714	0:d616ece2d859	2036	lcp_echo_lowerup (int unit)
mbed714	0:d616ece2d859	2037	{
mbed714	0:d616ece2d859	2038	fsm *f = &lcp_fsm[unit];
mbed714	0:d616ece2d859	2039
mbed714	0:d616ece2d859	2040	/* Clear the parameters for generating echo frames */
mbed714	0:d616ece2d859	2041	lcp_echos_pending = 0;
mbed714	0:d616ece2d859	2042	lcp_echo_number = 0;
mbed714	0:d616ece2d859	2043	lcp_echo_timer_running = 0;
mbed714	0:d616ece2d859	2044
mbed714	0:d616ece2d859	2045	/* If a timeout interval is specified then start the timer */
mbed714	0:d616ece2d859	2046	if (lcp_echo_interval != 0) {
mbed714	0:d616ece2d859	2047	LcpEchoCheck (f);
mbed714	0:d616ece2d859	2048	}
mbed714	0:d616ece2d859	2049	}
mbed714	0:d616ece2d859	2050
mbed714	0:d616ece2d859	2051	/*
mbed714	0:d616ece2d859	2052	* lcp_echo_lowerdown - Stop the timer for the LCP frame
mbed714	0:d616ece2d859	2053	*/
mbed714	0:d616ece2d859	2054
mbed714	0:d616ece2d859	2055	static void
mbed714	0:d616ece2d859	2056	lcp_echo_lowerdown (int unit)
mbed714	0:d616ece2d859	2057	{
mbed714	0:d616ece2d859	2058	fsm *f = &lcp_fsm[unit];
mbed714	0:d616ece2d859	2059
mbed714	0:d616ece2d859	2060	if (lcp_echo_timer_running != 0) {
mbed714	0:d616ece2d859	2061	UNTIMEOUT (LcpEchoTimeout, f);
mbed714	0:d616ece2d859	2062	lcp_echo_timer_running = 0;
mbed714	0:d616ece2d859	2063	}
mbed714	0:d616ece2d859	2064	}
mbed714	0:d616ece2d859	2065
mbed714	0:d616ece2d859	2066	#endif /* PPP_SUPPORT */

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Type:	Library
Created:	18 Sep 2010
Imports:	1
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	1

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lwip/netif/ppp/lcp.c@0:d616ece2d859, 2010-09-18 (annotated)

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