NetServicesSource - Experimental HTTPClient with proxy support

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Experimental HTTPClient with proxy support

lwip/netif/ppp/lcp.c@0:b56b6a05cad4, 2011-06-29 (annotated)

Committer:: igorsk
Date:: Wed Jun 29 16:01:58 2011 +0000
Revision:: 0:b56b6a05cad4

Who changed what in which revision?

User	Revision	Line number	New contents of line
igorsk	0:b56b6a05cad4	1	/*****************************************************************************
igorsk	0:b56b6a05cad4	2	* lcp.c - Network Link Control Protocol program file.
igorsk	0:b56b6a05cad4	3	*
igorsk	0:b56b6a05cad4	4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
igorsk	0:b56b6a05cad4	5	* portions Copyright (c) 1997 by Global Election Systems Inc.
igorsk	0:b56b6a05cad4	6	*
igorsk	0:b56b6a05cad4	7	* The authors hereby grant permission to use, copy, modify, distribute,
igorsk	0:b56b6a05cad4	8	* and license this software and its documentation for any purpose, provided
igorsk	0:b56b6a05cad4	9	* that existing copyright notices are retained in all copies and that this
igorsk	0:b56b6a05cad4	10	* notice and the following disclaimer are included verbatim in any
igorsk	0:b56b6a05cad4	11	* distributions. No written agreement, license, or royalty fee is required
igorsk	0:b56b6a05cad4	12	* for any of the authorized uses.
igorsk	0:b56b6a05cad4	13	*
igorsk	0:b56b6a05cad4	14	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
igorsk	0:b56b6a05cad4	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
igorsk	0:b56b6a05cad4	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
igorsk	0:b56b6a05cad4	17	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
igorsk	0:b56b6a05cad4	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
igorsk	0:b56b6a05cad4	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
igorsk	0:b56b6a05cad4	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
igorsk	0:b56b6a05cad4	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
igorsk	0:b56b6a05cad4	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
igorsk	0:b56b6a05cad4	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
igorsk	0:b56b6a05cad4	24	*
igorsk	0:b56b6a05cad4	25	******************************************************************************
igorsk	0:b56b6a05cad4	26	* REVISION HISTORY
igorsk	0:b56b6a05cad4	27	*
igorsk	0:b56b6a05cad4	28	* 03-01-01 Marc Boucher <marc@mbsi.ca>
igorsk	0:b56b6a05cad4	29	* Ported to lwIP.
igorsk	0:b56b6a05cad4	30	* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
igorsk	0:b56b6a05cad4	31	* Original.
igorsk	0:b56b6a05cad4	32	*****************************************************************************/
igorsk	0:b56b6a05cad4	33
igorsk	0:b56b6a05cad4	34	/*
igorsk	0:b56b6a05cad4	35	* lcp.c - PPP Link Control Protocol.
igorsk	0:b56b6a05cad4	36	*
igorsk	0:b56b6a05cad4	37	* Copyright (c) 1989 Carnegie Mellon University.
igorsk	0:b56b6a05cad4	38	* All rights reserved.
igorsk	0:b56b6a05cad4	39	*
igorsk	0:b56b6a05cad4	40	* Redistribution and use in source and binary forms are permitted
igorsk	0:b56b6a05cad4	41	* provided that the above copyright notice and this paragraph are
igorsk	0:b56b6a05cad4	42	* duplicated in all such forms and that any documentation,
igorsk	0:b56b6a05cad4	43	* advertising materials, and other materials related to such
igorsk	0:b56b6a05cad4	44	* distribution and use acknowledge that the software was developed
igorsk	0:b56b6a05cad4	45	* by Carnegie Mellon University. The name of the
igorsk	0:b56b6a05cad4	46	* University may not be used to endorse or promote products derived
igorsk	0:b56b6a05cad4	47	* from this software without specific prior written permission.
igorsk	0:b56b6a05cad4	48	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
igorsk	0:b56b6a05cad4	49	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
igorsk	0:b56b6a05cad4	50	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
igorsk	0:b56b6a05cad4	51	*/
igorsk	0:b56b6a05cad4	52
igorsk	0:b56b6a05cad4	53
igorsk	0:b56b6a05cad4	54	#include "lwip/opt.h"
igorsk	0:b56b6a05cad4	55
igorsk	0:b56b6a05cad4	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
igorsk	0:b56b6a05cad4	57
igorsk	0:b56b6a05cad4	58	#include "ppp.h"
igorsk	0:b56b6a05cad4	59	#include "pppdebug.h"
igorsk	0:b56b6a05cad4	60
igorsk	0:b56b6a05cad4	61	#include "fsm.h"
igorsk	0:b56b6a05cad4	62	#include "chap.h"
igorsk	0:b56b6a05cad4	63	#include "magic.h"
igorsk	0:b56b6a05cad4	64	#include "auth.h"
igorsk	0:b56b6a05cad4	65	#include "lcp.h"
igorsk	0:b56b6a05cad4	66
igorsk	0:b56b6a05cad4	67	#include <string.h>
igorsk	0:b56b6a05cad4	68
igorsk	0:b56b6a05cad4	69	#if PPPOE_SUPPORT
igorsk	0:b56b6a05cad4	70	#include "netif/ppp_oe.h"
igorsk	0:b56b6a05cad4	71	#else
igorsk	0:b56b6a05cad4	72	#define PPPOE_MAXMTU PPP_MAXMRU
igorsk	0:b56b6a05cad4	73	#endif
igorsk	0:b56b6a05cad4	74
igorsk	0:b56b6a05cad4	75	#if 0 /* UNUSED */
igorsk	0:b56b6a05cad4	76	/*
igorsk	0:b56b6a05cad4	77	* LCP-related command-line options.
igorsk	0:b56b6a05cad4	78	*/
igorsk	0:b56b6a05cad4	79	int lcp_echo_interval = 0; /* Interval between LCP echo-requests */
igorsk	0:b56b6a05cad4	80	int lcp_echo_fails = 0; /* Tolerance to unanswered echo-requests */
igorsk	0:b56b6a05cad4	81	bool lax_recv = 0; /* accept control chars in asyncmap */
igorsk	0:b56b6a05cad4	82
igorsk	0:b56b6a05cad4	83	static int setescape (char **);
igorsk	0:b56b6a05cad4	84
igorsk	0:b56b6a05cad4	85	static option_t lcp_option_list[] = {
igorsk	0:b56b6a05cad4	86	/* LCP options */
igorsk	0:b56b6a05cad4	87	/* list stripped for simplicity */
igorsk	0:b56b6a05cad4	88	{NULL}
igorsk	0:b56b6a05cad4	89	};
igorsk	0:b56b6a05cad4	90	#endif /* UNUSED */
igorsk	0:b56b6a05cad4	91
igorsk	0:b56b6a05cad4	92	/* options */
igorsk	0:b56b6a05cad4	93	LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */
igorsk	0:b56b6a05cad4	94	static u_int lcp_echo_interval = LCP_ECHOINTERVAL; /* Interval between LCP echo-requests */
igorsk	0:b56b6a05cad4	95	static u_int lcp_echo_fails = LCP_MAXECHOFAILS; /* Tolerance to unanswered echo-requests */
igorsk	0:b56b6a05cad4	96
igorsk	0:b56b6a05cad4	97	/* global vars */
igorsk	0:b56b6a05cad4	98	static fsm lcp_fsm[NUM_PPP]; /* LCP fsm structure (global)*/
igorsk	0:b56b6a05cad4	99	lcp_options lcp_wantoptions[NUM_PPP]; /* Options that we want to request */
igorsk	0:b56b6a05cad4	100	lcp_options lcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
igorsk	0:b56b6a05cad4	101	lcp_options lcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
igorsk	0:b56b6a05cad4	102	lcp_options lcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
igorsk	0:b56b6a05cad4	103	ext_accm xmit_accm[NUM_PPP]; /* extended transmit ACCM */
igorsk	0:b56b6a05cad4	104
igorsk	0:b56b6a05cad4	105	static u32_t lcp_echos_pending = 0; /* Number of outstanding echo msgs */
igorsk	0:b56b6a05cad4	106	static u32_t lcp_echo_number = 0; /* ID number of next echo frame */
igorsk	0:b56b6a05cad4	107	static u32_t lcp_echo_timer_running = 0; /* TRUE if a timer is running */
igorsk	0:b56b6a05cad4	108
igorsk	0:b56b6a05cad4	109	/* @todo: do we really need such a large buffer? The typical 1500 bytes seem too much. */
igorsk	0:b56b6a05cad4	110	static u_char nak_buffer[PPP_MRU]; /* where we construct a nak packet */
igorsk	0:b56b6a05cad4	111
igorsk	0:b56b6a05cad4	112	/*
igorsk	0:b56b6a05cad4	113	* Callbacks for fsm code. (CI = Configuration Information)
igorsk	0:b56b6a05cad4	114	*/
igorsk	0:b56b6a05cad4	115	static void lcp_resetci (fsm); / Reset our CI */
igorsk	0:b56b6a05cad4	116	static int lcp_cilen (fsm); / Return length of our CI */
igorsk	0:b56b6a05cad4	117	static void lcp_addci (fsm, u_char, int); / Add our CI to pkt */
igorsk	0:b56b6a05cad4	118	static int lcp_ackci (fsm, u_char, int); /* Peer ack'd our CI */
igorsk	0:b56b6a05cad4	119	static int lcp_nakci (fsm, u_char, int); /* Peer nak'd our CI */
igorsk	0:b56b6a05cad4	120	static int lcp_rejci (fsm, u_char, int); /* Peer rej'd our CI */
igorsk	0:b56b6a05cad4	121	static int lcp_reqci (fsm, u_char, int, int); / Rcv peer CI */
igorsk	0:b56b6a05cad4	122	static void lcp_up (fsm); / We're UP */
igorsk	0:b56b6a05cad4	123	static void lcp_down (fsm); / We're DOWN */
igorsk	0:b56b6a05cad4	124	static void lcp_starting (fsm); / We need lower layer up */
igorsk	0:b56b6a05cad4	125	static void lcp_finished (fsm); / We need lower layer down */
igorsk	0:b56b6a05cad4	126	static int lcp_extcode (fsm, int, u_char, u_char, int);
igorsk	0:b56b6a05cad4	127	static void lcp_rprotrej (fsm, u_char, int);
igorsk	0:b56b6a05cad4	128
igorsk	0:b56b6a05cad4	129	/*
igorsk	0:b56b6a05cad4	130	* routines to send LCP echos to peer
igorsk	0:b56b6a05cad4	131	*/
igorsk	0:b56b6a05cad4	132
igorsk	0:b56b6a05cad4	133	static void lcp_echo_lowerup (int);
igorsk	0:b56b6a05cad4	134	static void lcp_echo_lowerdown (int);
igorsk	0:b56b6a05cad4	135	static void LcpEchoTimeout (void*);
igorsk	0:b56b6a05cad4	136	static void lcp_received_echo_reply (fsm, int, u_char, int);
igorsk	0:b56b6a05cad4	137	static void LcpSendEchoRequest (fsm*);
igorsk	0:b56b6a05cad4	138	static void LcpLinkFailure (fsm*);
igorsk	0:b56b6a05cad4	139	static void LcpEchoCheck (fsm*);
igorsk	0:b56b6a05cad4	140
igorsk	0:b56b6a05cad4	141	static fsm_callbacks lcp_callbacks = { /* LCP callback routines */
igorsk	0:b56b6a05cad4	142	lcp_resetci, /* Reset our Configuration Information */
igorsk	0:b56b6a05cad4	143	lcp_cilen, /* Length of our Configuration Information */
igorsk	0:b56b6a05cad4	144	lcp_addci, /* Add our Configuration Information */
igorsk	0:b56b6a05cad4	145	lcp_ackci, /* ACK our Configuration Information */
igorsk	0:b56b6a05cad4	146	lcp_nakci, /* NAK our Configuration Information */
igorsk	0:b56b6a05cad4	147	lcp_rejci, /* Reject our Configuration Information */
igorsk	0:b56b6a05cad4	148	lcp_reqci, /* Request peer's Configuration Information */
igorsk	0:b56b6a05cad4	149	lcp_up, /* Called when fsm reaches LS_OPENED state */
igorsk	0:b56b6a05cad4	150	lcp_down, /* Called when fsm leaves LS_OPENED state */
igorsk	0:b56b6a05cad4	151	lcp_starting, /* Called when we want the lower layer up */
igorsk	0:b56b6a05cad4	152	lcp_finished, /* Called when we want the lower layer down */
igorsk	0:b56b6a05cad4	153	NULL, /* Called when Protocol-Reject received */
igorsk	0:b56b6a05cad4	154	NULL, /* Retransmission is necessary */
igorsk	0:b56b6a05cad4	155	lcp_extcode, /* Called to handle LCP-specific codes */
igorsk	0:b56b6a05cad4	156	"LCP" /* String name of protocol */
igorsk	0:b56b6a05cad4	157	};
igorsk	0:b56b6a05cad4	158
igorsk	0:b56b6a05cad4	159	/*
igorsk	0:b56b6a05cad4	160	* Protocol entry points.
igorsk	0:b56b6a05cad4	161	* Some of these are called directly.
igorsk	0:b56b6a05cad4	162	*/
igorsk	0:b56b6a05cad4	163
igorsk	0:b56b6a05cad4	164	static void lcp_input (int, u_char *, int);
igorsk	0:b56b6a05cad4	165	static void lcp_protrej (int);
igorsk	0:b56b6a05cad4	166
igorsk	0:b56b6a05cad4	167	struct protent lcp_protent = {
igorsk	0:b56b6a05cad4	168	PPP_LCP,
igorsk	0:b56b6a05cad4	169	lcp_init,
igorsk	0:b56b6a05cad4	170	lcp_input,
igorsk	0:b56b6a05cad4	171	lcp_protrej,
igorsk	0:b56b6a05cad4	172	lcp_lowerup,
igorsk	0:b56b6a05cad4	173	lcp_lowerdown,
igorsk	0:b56b6a05cad4	174	lcp_open,
igorsk	0:b56b6a05cad4	175	lcp_close,
igorsk	0:b56b6a05cad4	176	#if PPP_ADDITIONAL_CALLBACKS
igorsk	0:b56b6a05cad4	177	lcp_printpkt,
igorsk	0:b56b6a05cad4	178	NULL,
igorsk	0:b56b6a05cad4	179	#endif /* PPP_ADDITIONAL_CALLBACKS */
igorsk	0:b56b6a05cad4	180	1,
igorsk	0:b56b6a05cad4	181	"LCP",
igorsk	0:b56b6a05cad4	182	#if PPP_ADDITIONAL_CALLBACKS
igorsk	0:b56b6a05cad4	183	NULL,
igorsk	0:b56b6a05cad4	184	NULL,
igorsk	0:b56b6a05cad4	185	NULL
igorsk	0:b56b6a05cad4	186	#endif /* PPP_ADDITIONAL_CALLBACKS */
igorsk	0:b56b6a05cad4	187	};
igorsk	0:b56b6a05cad4	188
igorsk	0:b56b6a05cad4	189	int lcp_loopbackfail = DEFLOOPBACKFAIL;
igorsk	0:b56b6a05cad4	190
igorsk	0:b56b6a05cad4	191	/*
igorsk	0:b56b6a05cad4	192	* Length of each type of configuration option (in octets)
igorsk	0:b56b6a05cad4	193	*/
igorsk	0:b56b6a05cad4	194	#define CILEN_VOID 2
igorsk	0:b56b6a05cad4	195	#define CILEN_CHAR 3
igorsk	0:b56b6a05cad4	196	#define CILEN_SHORT 4 /* CILEN_VOID + sizeof(short) */
igorsk	0:b56b6a05cad4	197	#define CILEN_CHAP 5 /* CILEN_VOID + sizeof(short) + 1 */
igorsk	0:b56b6a05cad4	198	#define CILEN_LONG 6 /* CILEN_VOID + sizeof(long) */
igorsk	0:b56b6a05cad4	199	#define CILEN_LQR 8 /* CILEN_VOID + sizeof(short) + sizeof(long) */
igorsk	0:b56b6a05cad4	200	#define CILEN_CBCP 3
igorsk	0:b56b6a05cad4	201
igorsk	0:b56b6a05cad4	202	#define CODENAME(x) ((x) == CONFACK ? "ACK" : (x) == CONFNAK ? "NAK" : "REJ")
igorsk	0:b56b6a05cad4	203
igorsk	0:b56b6a05cad4	204	#if 0 /* UNUSED */
igorsk	0:b56b6a05cad4	205	/*
igorsk	0:b56b6a05cad4	206	* setescape - add chars to the set we escape on transmission.
igorsk	0:b56b6a05cad4	207	*/
igorsk	0:b56b6a05cad4	208	static int
igorsk	0:b56b6a05cad4	209	setescape(argv)
igorsk	0:b56b6a05cad4	210	char **argv;
igorsk	0:b56b6a05cad4	211	{
igorsk	0:b56b6a05cad4	212	int n, ret;
igorsk	0:b56b6a05cad4	213	char p, endp;
igorsk	0:b56b6a05cad4	214
igorsk	0:b56b6a05cad4	215	p = *argv;
igorsk	0:b56b6a05cad4	216	ret = 1;
igorsk	0:b56b6a05cad4	217	while (*p) {
igorsk	0:b56b6a05cad4	218	n = strtol(p, &endp, 16);
igorsk	0:b56b6a05cad4	219	if (p == endp) {
igorsk	0:b56b6a05cad4	220	option_error("escape parameter contains invalid hex number '%s'", p);
igorsk	0:b56b6a05cad4	221	return 0;
igorsk	0:b56b6a05cad4	222	}
igorsk	0:b56b6a05cad4	223	p = endp;
igorsk	0:b56b6a05cad4	224	if (n < 0 \|\| n == 0x5E \|\| n > 0xFF) {
igorsk	0:b56b6a05cad4	225	option_error("can't escape character 0x%x", n);
igorsk	0:b56b6a05cad4	226	ret = 0;
igorsk	0:b56b6a05cad4	227	} else
igorsk	0:b56b6a05cad4	228	xmit_accm[0][n >> 5] \|= 1 << (n & 0x1F);
igorsk	0:b56b6a05cad4	229	while (p == ',' \|\| p == ' ')
igorsk	0:b56b6a05cad4	230	++p;
igorsk	0:b56b6a05cad4	231	}
igorsk	0:b56b6a05cad4	232	return ret;
igorsk	0:b56b6a05cad4	233	}
igorsk	0:b56b6a05cad4	234	#endif /* UNUSED */
igorsk	0:b56b6a05cad4	235
igorsk	0:b56b6a05cad4	236	/*
igorsk	0:b56b6a05cad4	237	* lcp_init - Initialize LCP.
igorsk	0:b56b6a05cad4	238	*/
igorsk	0:b56b6a05cad4	239	void
igorsk	0:b56b6a05cad4	240	lcp_init(int unit)
igorsk	0:b56b6a05cad4	241	{
igorsk	0:b56b6a05cad4	242	fsm *f = &lcp_fsm[unit];
igorsk	0:b56b6a05cad4	243	lcp_options *wo = &lcp_wantoptions[unit];
igorsk	0:b56b6a05cad4	244	lcp_options *ao = &lcp_allowoptions[unit];
igorsk	0:b56b6a05cad4	245
igorsk	0:b56b6a05cad4	246	f->unit = unit;
igorsk	0:b56b6a05cad4	247	f->protocol = PPP_LCP;
igorsk	0:b56b6a05cad4	248	f->callbacks = &lcp_callbacks;
igorsk	0:b56b6a05cad4	249
igorsk	0:b56b6a05cad4	250	fsm_init(f);
igorsk	0:b56b6a05cad4	251
igorsk	0:b56b6a05cad4	252	wo->passive = 0;
igorsk	0:b56b6a05cad4	253	wo->silent = 0;
igorsk	0:b56b6a05cad4	254	wo->restart = 0; /* Set to 1 in kernels or multi-line implementations */
igorsk	0:b56b6a05cad4	255	wo->neg_mru = 1;
igorsk	0:b56b6a05cad4	256	wo->mru = PPP_DEFMRU;
igorsk	0:b56b6a05cad4	257	wo->neg_asyncmap = 1;
igorsk	0:b56b6a05cad4	258	wo->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
igorsk	0:b56b6a05cad4	259	wo->neg_chap = 0; /* Set to 1 on server */
igorsk	0:b56b6a05cad4	260	wo->neg_upap = 0; /* Set to 1 on server */
igorsk	0:b56b6a05cad4	261	wo->chap_mdtype = CHAP_DIGEST_MD5;
igorsk	0:b56b6a05cad4	262	wo->neg_magicnumber = 1;
igorsk	0:b56b6a05cad4	263	wo->neg_pcompression = 1;
igorsk	0:b56b6a05cad4	264	wo->neg_accompression = 1;
igorsk	0:b56b6a05cad4	265	wo->neg_lqr = 0; /* no LQR implementation yet */
igorsk	0:b56b6a05cad4	266	wo->neg_cbcp = 0;
igorsk	0:b56b6a05cad4	267
igorsk	0:b56b6a05cad4	268	ao->neg_mru = 1;
igorsk	0:b56b6a05cad4	269	ao->mru = PPP_MAXMRU;
igorsk	0:b56b6a05cad4	270	ao->neg_asyncmap = 1;
igorsk	0:b56b6a05cad4	271	ao->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
igorsk	0:b56b6a05cad4	272	ao->neg_chap = (CHAP_SUPPORT != 0);
igorsk	0:b56b6a05cad4	273	ao->chap_mdtype = CHAP_DIGEST_MD5;
igorsk	0:b56b6a05cad4	274	ao->neg_upap = (PAP_SUPPORT != 0);
igorsk	0:b56b6a05cad4	275	ao->neg_magicnumber = 1;
igorsk	0:b56b6a05cad4	276	ao->neg_pcompression = 1;
igorsk	0:b56b6a05cad4	277	ao->neg_accompression = 1;
igorsk	0:b56b6a05cad4	278	ao->neg_lqr = 0; /* no LQR implementation yet */
igorsk	0:b56b6a05cad4	279	ao->neg_cbcp = (CBCP_SUPPORT != 0);
igorsk	0:b56b6a05cad4	280
igorsk	0:b56b6a05cad4	281	/*
igorsk	0:b56b6a05cad4	282	* Set transmit escape for the flag and escape characters plus anything
igorsk	0:b56b6a05cad4	283	* set for the allowable options.
igorsk	0:b56b6a05cad4	284	*/
igorsk	0:b56b6a05cad4	285	memset(xmit_accm[unit], 0, sizeof(xmit_accm[0]));
igorsk	0:b56b6a05cad4	286	xmit_accm[unit][15] = 0x60;
igorsk	0:b56b6a05cad4	287	xmit_accm[unit][0] = (u_char)((ao->asyncmap & 0xFF));
igorsk	0:b56b6a05cad4	288	xmit_accm[unit][1] = (u_char)((ao->asyncmap >> 8) & 0xFF);
igorsk	0:b56b6a05cad4	289	xmit_accm[unit][2] = (u_char)((ao->asyncmap >> 16) & 0xFF);
igorsk	0:b56b6a05cad4	290	xmit_accm[unit][3] = (u_char)((ao->asyncmap >> 24) & 0xFF);
igorsk	0:b56b6a05cad4	291	LCPDEBUG(LOG_INFO, ("lcp_init: xmit_accm=%X %X %X %X\n",
igorsk	0:b56b6a05cad4	292	xmit_accm[unit][0],
igorsk	0:b56b6a05cad4	293	xmit_accm[unit][1],
igorsk	0:b56b6a05cad4	294	xmit_accm[unit][2],
igorsk	0:b56b6a05cad4	295	xmit_accm[unit][3]));
igorsk	0:b56b6a05cad4	296
igorsk	0:b56b6a05cad4	297	lcp_phase[unit] = PHASE_INITIALIZE;
igorsk	0:b56b6a05cad4	298	}
igorsk	0:b56b6a05cad4	299
igorsk	0:b56b6a05cad4	300
igorsk	0:b56b6a05cad4	301	/*
igorsk	0:b56b6a05cad4	302	* lcp_open - LCP is allowed to come up.
igorsk	0:b56b6a05cad4	303	*/
igorsk	0:b56b6a05cad4	304	void
igorsk	0:b56b6a05cad4	305	lcp_open(int unit)
igorsk	0:b56b6a05cad4	306	{
igorsk	0:b56b6a05cad4	307	fsm *f = &lcp_fsm[unit];
igorsk	0:b56b6a05cad4	308	lcp_options *wo = &lcp_wantoptions[unit];
igorsk	0:b56b6a05cad4	309
igorsk	0:b56b6a05cad4	310	f->flags = 0;
igorsk	0:b56b6a05cad4	311	if (wo->passive) {
igorsk	0:b56b6a05cad4	312	f->flags \|= OPT_PASSIVE;
igorsk	0:b56b6a05cad4	313	}
igorsk	0:b56b6a05cad4	314	if (wo->silent) {
igorsk	0:b56b6a05cad4	315	f->flags \|= OPT_SILENT;
igorsk	0:b56b6a05cad4	316	}
igorsk	0:b56b6a05cad4	317	fsm_open(f);
igorsk	0:b56b6a05cad4	318
igorsk	0:b56b6a05cad4	319	lcp_phase[unit] = PHASE_ESTABLISH;
igorsk	0:b56b6a05cad4	320	}
igorsk	0:b56b6a05cad4	321
igorsk	0:b56b6a05cad4	322
igorsk	0:b56b6a05cad4	323	/*
igorsk	0:b56b6a05cad4	324	* lcp_close - Take LCP down.
igorsk	0:b56b6a05cad4	325	*/
igorsk	0:b56b6a05cad4	326	void
igorsk	0:b56b6a05cad4	327	lcp_close(int unit, char *reason)
igorsk	0:b56b6a05cad4	328	{
igorsk	0:b56b6a05cad4	329	fsm *f = &lcp_fsm[unit];
igorsk	0:b56b6a05cad4	330
igorsk	0:b56b6a05cad4	331	if (lcp_phase[unit] != PHASE_DEAD) {
igorsk	0:b56b6a05cad4	332	lcp_phase[unit] = PHASE_TERMINATE;
igorsk	0:b56b6a05cad4	333	}
igorsk	0:b56b6a05cad4	334	if (f->state == LS_STOPPED && f->flags & (OPT_PASSIVE\|OPT_SILENT)) {
igorsk	0:b56b6a05cad4	335	/*
igorsk	0:b56b6a05cad4	336	* This action is not strictly according to the FSM in RFC1548,
igorsk	0:b56b6a05cad4	337	* but it does mean that the program terminates if you do an
igorsk	0:b56b6a05cad4	338	* lcp_close() in passive/silent mode when a connection hasn't
igorsk	0:b56b6a05cad4	339	* been established.
igorsk	0:b56b6a05cad4	340	*/
igorsk	0:b56b6a05cad4	341	f->state = LS_CLOSED;
igorsk	0:b56b6a05cad4	342	lcp_finished(f);
igorsk	0:b56b6a05cad4	343	} else {
igorsk	0:b56b6a05cad4	344	fsm_close(f, reason);
igorsk	0:b56b6a05cad4	345	}
igorsk	0:b56b6a05cad4	346	}
igorsk	0:b56b6a05cad4	347
igorsk	0:b56b6a05cad4	348
igorsk	0:b56b6a05cad4	349	/*
igorsk	0:b56b6a05cad4	350	* lcp_lowerup - The lower layer is up.
igorsk	0:b56b6a05cad4	351	*/
igorsk	0:b56b6a05cad4	352	void
igorsk	0:b56b6a05cad4	353	lcp_lowerup(int unit)
igorsk	0:b56b6a05cad4	354	{
igorsk	0:b56b6a05cad4	355	lcp_options *wo = &lcp_wantoptions[unit];
igorsk	0:b56b6a05cad4	356
igorsk	0:b56b6a05cad4	357	/*
igorsk	0:b56b6a05cad4	358	* Don't use A/C or protocol compression on transmission,
igorsk	0:b56b6a05cad4	359	* but accept A/C and protocol compressed packets
igorsk	0:b56b6a05cad4	360	* if we are going to ask for A/C and protocol compression.
igorsk	0:b56b6a05cad4	361	*/
igorsk	0:b56b6a05cad4	362	ppp_set_xaccm(unit, &xmit_accm[unit]);
igorsk	0:b56b6a05cad4	363	ppp_send_config(unit, PPP_MRU, 0xffffffffl, 0, 0);
igorsk	0:b56b6a05cad4	364	ppp_recv_config(unit, PPP_MRU, 0x00000000l,
igorsk	0:b56b6a05cad4	365	wo->neg_pcompression, wo->neg_accompression);
igorsk	0:b56b6a05cad4	366	peer_mru[unit] = PPP_MRU;
igorsk	0:b56b6a05cad4	367	lcp_allowoptions[unit].asyncmap = (u_long)xmit_accm[unit][0]
igorsk	0:b56b6a05cad4	368	\| ((u_long)xmit_accm[unit][1] << 8)
igorsk	0:b56b6a05cad4	369	\| ((u_long)xmit_accm[unit][2] << 16)
igorsk	0:b56b6a05cad4	370	\| ((u_long)xmit_accm[unit][3] << 24);
igorsk	0:b56b6a05cad4	371	LCPDEBUG(LOG_INFO, ("lcp_lowerup: asyncmap=%X %X %X %X\n",
igorsk	0:b56b6a05cad4	372	xmit_accm[unit][3],
igorsk	0:b56b6a05cad4	373	xmit_accm[unit][2],
igorsk	0:b56b6a05cad4	374	xmit_accm[unit][1],
igorsk	0:b56b6a05cad4	375	xmit_accm[unit][0]));
igorsk	0:b56b6a05cad4	376
igorsk	0:b56b6a05cad4	377	fsm_lowerup(&lcp_fsm[unit]);
igorsk	0:b56b6a05cad4	378	}
igorsk	0:b56b6a05cad4	379
igorsk	0:b56b6a05cad4	380
igorsk	0:b56b6a05cad4	381	/*
igorsk	0:b56b6a05cad4	382	* lcp_lowerdown - The lower layer is down.
igorsk	0:b56b6a05cad4	383	*/
igorsk	0:b56b6a05cad4	384	void
igorsk	0:b56b6a05cad4	385	lcp_lowerdown(int unit)
igorsk	0:b56b6a05cad4	386	{
igorsk	0:b56b6a05cad4	387	fsm_lowerdown(&lcp_fsm[unit]);
igorsk	0:b56b6a05cad4	388	}
igorsk	0:b56b6a05cad4	389
igorsk	0:b56b6a05cad4	390
igorsk	0:b56b6a05cad4	391	/*
igorsk	0:b56b6a05cad4	392	* lcp_input - Input LCP packet.
igorsk	0:b56b6a05cad4	393	*/
igorsk	0:b56b6a05cad4	394	static void
igorsk	0:b56b6a05cad4	395	lcp_input(int unit, u_char *p, int len)
igorsk	0:b56b6a05cad4	396	{
igorsk	0:b56b6a05cad4	397	fsm *f = &lcp_fsm[unit];
igorsk	0:b56b6a05cad4	398
igorsk	0:b56b6a05cad4	399	fsm_input(f, p, len);
igorsk	0:b56b6a05cad4	400	}
igorsk	0:b56b6a05cad4	401
igorsk	0:b56b6a05cad4	402
igorsk	0:b56b6a05cad4	403	/*
igorsk	0:b56b6a05cad4	404	* lcp_extcode - Handle a LCP-specific code.
igorsk	0:b56b6a05cad4	405	*/
igorsk	0:b56b6a05cad4	406	static int
igorsk	0:b56b6a05cad4	407	lcp_extcode(fsm f, int code, u_char id, u_char inp, int len)
igorsk	0:b56b6a05cad4	408	{
igorsk	0:b56b6a05cad4	409	u_char *magp;
igorsk	0:b56b6a05cad4	410
igorsk	0:b56b6a05cad4	411	switch( code ){
igorsk	0:b56b6a05cad4	412	case PROTREJ:
igorsk	0:b56b6a05cad4	413	lcp_rprotrej(f, inp, len);
igorsk	0:b56b6a05cad4	414	break;
igorsk	0:b56b6a05cad4	415
igorsk	0:b56b6a05cad4	416	case ECHOREQ:
igorsk	0:b56b6a05cad4	417	if (f->state != LS_OPENED) {
igorsk	0:b56b6a05cad4	418	break;
igorsk	0:b56b6a05cad4	419	}
igorsk	0:b56b6a05cad4	420	LCPDEBUG(LOG_INFO, ("lcp: Echo-Request, Rcvd id %d\n", id));
igorsk	0:b56b6a05cad4	421	magp = inp;
igorsk	0:b56b6a05cad4	422	PUTLONG(lcp_gotoptions[f->unit].magicnumber, magp);
igorsk	0:b56b6a05cad4	423	fsm_sdata(f, ECHOREP, id, inp, len);
igorsk	0:b56b6a05cad4	424	break;
igorsk	0:b56b6a05cad4	425
igorsk	0:b56b6a05cad4	426	case ECHOREP:
igorsk	0:b56b6a05cad4	427	lcp_received_echo_reply(f, id, inp, len);
igorsk	0:b56b6a05cad4	428	break;
igorsk	0:b56b6a05cad4	429
igorsk	0:b56b6a05cad4	430	case DISCREQ:
igorsk	0:b56b6a05cad4	431	break;
igorsk	0:b56b6a05cad4	432
igorsk	0:b56b6a05cad4	433	default:
igorsk	0:b56b6a05cad4	434	return 0;
igorsk	0:b56b6a05cad4	435	}
igorsk	0:b56b6a05cad4	436	return 1;
igorsk	0:b56b6a05cad4	437	}
igorsk	0:b56b6a05cad4	438
igorsk	0:b56b6a05cad4	439
igorsk	0:b56b6a05cad4	440	/*
igorsk	0:b56b6a05cad4	441	* lcp_rprotrej - Receive an Protocol-Reject.
igorsk	0:b56b6a05cad4	442	*
igorsk	0:b56b6a05cad4	443	* Figure out which protocol is rejected and inform it.
igorsk	0:b56b6a05cad4	444	*/
igorsk	0:b56b6a05cad4	445	static void
igorsk	0:b56b6a05cad4	446	lcp_rprotrej(fsm f, u_char inp, int len)
igorsk	0:b56b6a05cad4	447	{
igorsk	0:b56b6a05cad4	448	int i;
igorsk	0:b56b6a05cad4	449	struct protent *protp;
igorsk	0:b56b6a05cad4	450	u_short prot;
igorsk	0:b56b6a05cad4	451
igorsk	0:b56b6a05cad4	452	if (len < (int)sizeof (u_short)) {
igorsk	0:b56b6a05cad4	453	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd short Protocol-Reject packet!\n"));
igorsk	0:b56b6a05cad4	454	return;
igorsk	0:b56b6a05cad4	455	}
igorsk	0:b56b6a05cad4	456
igorsk	0:b56b6a05cad4	457	GETSHORT(prot, inp);
igorsk	0:b56b6a05cad4	458
igorsk	0:b56b6a05cad4	459	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd Protocol-Reject packet for %x!\n", prot));
igorsk	0:b56b6a05cad4	460
igorsk	0:b56b6a05cad4	461	/*
igorsk	0:b56b6a05cad4	462	* Protocol-Reject packets received in any state other than the LCP
igorsk	0:b56b6a05cad4	463	* LS_OPENED state SHOULD be silently discarded.
igorsk	0:b56b6a05cad4	464	*/
igorsk	0:b56b6a05cad4	465	if( f->state != LS_OPENED ) {
igorsk	0:b56b6a05cad4	466	LCPDEBUG(LOG_INFO, ("Protocol-Reject discarded: LCP in state %d\n", f->state));
igorsk	0:b56b6a05cad4	467	return;
igorsk	0:b56b6a05cad4	468	}
igorsk	0:b56b6a05cad4	469
igorsk	0:b56b6a05cad4	470	/*
igorsk	0:b56b6a05cad4	471	* Upcall the proper Protocol-Reject routine.
igorsk	0:b56b6a05cad4	472	*/
igorsk	0:b56b6a05cad4	473	for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
igorsk	0:b56b6a05cad4	474	if (protp->protocol == prot && protp->enabled_flag) {
igorsk	0:b56b6a05cad4	475	(*protp->protrej)(f->unit);
igorsk	0:b56b6a05cad4	476	return;
igorsk	0:b56b6a05cad4	477	}
igorsk	0:b56b6a05cad4	478	}
igorsk	0:b56b6a05cad4	479
igorsk	0:b56b6a05cad4	480	LCPDEBUG(LOG_WARNING, ("Protocol-Reject for unsupported protocol 0x%x\n", prot));
igorsk	0:b56b6a05cad4	481	}
igorsk	0:b56b6a05cad4	482
igorsk	0:b56b6a05cad4	483
igorsk	0:b56b6a05cad4	484	/*
igorsk	0:b56b6a05cad4	485	* lcp_protrej - A Protocol-Reject was received.
igorsk	0:b56b6a05cad4	486	*/
igorsk	0:b56b6a05cad4	487	static void
igorsk	0:b56b6a05cad4	488	lcp_protrej(int unit)
igorsk	0:b56b6a05cad4	489	{
igorsk	0:b56b6a05cad4	490	LWIP_UNUSED_ARG(unit);
igorsk	0:b56b6a05cad4	491	/*
igorsk	0:b56b6a05cad4	492	* Can't reject LCP!
igorsk	0:b56b6a05cad4	493	*/
igorsk	0:b56b6a05cad4	494	LCPDEBUG(LOG_WARNING, ("lcp_protrej: Received Protocol-Reject for LCP!\n"));
igorsk	0:b56b6a05cad4	495	fsm_protreject(&lcp_fsm[unit]);
igorsk	0:b56b6a05cad4	496	}
igorsk	0:b56b6a05cad4	497
igorsk	0:b56b6a05cad4	498
igorsk	0:b56b6a05cad4	499	/*
igorsk	0:b56b6a05cad4	500	* lcp_sprotrej - Send a Protocol-Reject for some protocol.
igorsk	0:b56b6a05cad4	501	*/
igorsk	0:b56b6a05cad4	502	void
igorsk	0:b56b6a05cad4	503	lcp_sprotrej(int unit, u_char *p, int len)
igorsk	0:b56b6a05cad4	504	{
igorsk	0:b56b6a05cad4	505	/*
igorsk	0:b56b6a05cad4	506	* Send back the protocol and the information field of the
igorsk	0:b56b6a05cad4	507	* rejected packet. We only get here if LCP is in the LS_OPENED state.
igorsk	0:b56b6a05cad4	508	*/
igorsk	0:b56b6a05cad4	509
igorsk	0:b56b6a05cad4	510	fsm_sdata(&lcp_fsm[unit], PROTREJ, ++lcp_fsm[unit].id, p, len);
igorsk	0:b56b6a05cad4	511	}
igorsk	0:b56b6a05cad4	512
igorsk	0:b56b6a05cad4	513
igorsk	0:b56b6a05cad4	514	/*
igorsk	0:b56b6a05cad4	515	* lcp_resetci - Reset our CI.
igorsk	0:b56b6a05cad4	516	*/
igorsk	0:b56b6a05cad4	517	static void
igorsk	0:b56b6a05cad4	518	lcp_resetci(fsm *f)
igorsk	0:b56b6a05cad4	519	{
igorsk	0:b56b6a05cad4	520	lcp_wantoptions[f->unit].magicnumber = magic();
igorsk	0:b56b6a05cad4	521	lcp_wantoptions[f->unit].numloops = 0;
igorsk	0:b56b6a05cad4	522	lcp_gotoptions[f->unit] = lcp_wantoptions[f->unit];
igorsk	0:b56b6a05cad4	523	peer_mru[f->unit] = PPP_MRU;
igorsk	0:b56b6a05cad4	524	auth_reset(f->unit);
igorsk	0:b56b6a05cad4	525	}
igorsk	0:b56b6a05cad4	526
igorsk	0:b56b6a05cad4	527
igorsk	0:b56b6a05cad4	528	/*
igorsk	0:b56b6a05cad4	529	* lcp_cilen - Return length of our CI.
igorsk	0:b56b6a05cad4	530	*/
igorsk	0:b56b6a05cad4	531	static int
igorsk	0:b56b6a05cad4	532	lcp_cilen(fsm *f)
igorsk	0:b56b6a05cad4	533	{
igorsk	0:b56b6a05cad4	534	lcp_options *go = &lcp_gotoptions[f->unit];
igorsk	0:b56b6a05cad4	535
igorsk	0:b56b6a05cad4	536	#define LENCIVOID(neg) ((neg) ? CILEN_VOID : 0)
igorsk	0:b56b6a05cad4	537	#define LENCICHAP(neg) ((neg) ? CILEN_CHAP : 0)
igorsk	0:b56b6a05cad4	538	#define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0)
igorsk	0:b56b6a05cad4	539	#define LENCILONG(neg) ((neg) ? CILEN_LONG : 0)
igorsk	0:b56b6a05cad4	540	#define LENCILQR(neg) ((neg) ? CILEN_LQR: 0)
igorsk	0:b56b6a05cad4	541	#define LENCICBCP(neg) ((neg) ? CILEN_CBCP: 0)
igorsk	0:b56b6a05cad4	542	/*
igorsk	0:b56b6a05cad4	543	* NB: we only ask for one of CHAP and UPAP, even if we will
igorsk	0:b56b6a05cad4	544	* accept either.
igorsk	0:b56b6a05cad4	545	*/
igorsk	0:b56b6a05cad4	546	return (LENCISHORT(go->neg_mru && go->mru != PPP_DEFMRU) +
igorsk	0:b56b6a05cad4	547	LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) +
igorsk	0:b56b6a05cad4	548	LENCICHAP(go->neg_chap) +
igorsk	0:b56b6a05cad4	549	LENCISHORT(!go->neg_chap && go->neg_upap) +
igorsk	0:b56b6a05cad4	550	LENCILQR(go->neg_lqr) +
igorsk	0:b56b6a05cad4	551	LENCICBCP(go->neg_cbcp) +
igorsk	0:b56b6a05cad4	552	LENCILONG(go->neg_magicnumber) +
igorsk	0:b56b6a05cad4	553	LENCIVOID(go->neg_pcompression) +
igorsk	0:b56b6a05cad4	554	LENCIVOID(go->neg_accompression));
igorsk	0:b56b6a05cad4	555	}
igorsk	0:b56b6a05cad4	556
igorsk	0:b56b6a05cad4	557
igorsk	0:b56b6a05cad4	558	/*
igorsk	0:b56b6a05cad4	559	* lcp_addci - Add our desired CIs to a packet.
igorsk	0:b56b6a05cad4	560	*/
igorsk	0:b56b6a05cad4	561	static void
igorsk	0:b56b6a05cad4	562	lcp_addci(fsm f, u_char ucp, int *lenp)
igorsk	0:b56b6a05cad4	563	{
igorsk	0:b56b6a05cad4	564	lcp_options *go = &lcp_gotoptions[f->unit];
igorsk	0:b56b6a05cad4	565	u_char *start_ucp = ucp;
igorsk	0:b56b6a05cad4	566
igorsk	0:b56b6a05cad4	567	#define ADDCIVOID(opt, neg) \
igorsk	0:b56b6a05cad4	568	if (neg) { \
igorsk	0:b56b6a05cad4	569	LCPDEBUG(LOG_INFO, ("lcp_addci: opt=%d\n", opt)); \
igorsk	0:b56b6a05cad4	570	PUTCHAR(opt, ucp); \
igorsk	0:b56b6a05cad4	571	PUTCHAR(CILEN_VOID, ucp); \
igorsk	0:b56b6a05cad4	572	}
igorsk	0:b56b6a05cad4	573	#define ADDCISHORT(opt, neg, val) \
igorsk	0:b56b6a05cad4	574	if (neg) { \
igorsk	0:b56b6a05cad4	575	LCPDEBUG(LOG_INFO, ("lcp_addci: INT opt=%d %X\n", opt, val)); \
igorsk	0:b56b6a05cad4	576	PUTCHAR(opt, ucp); \
igorsk	0:b56b6a05cad4	577	PUTCHAR(CILEN_SHORT, ucp); \
igorsk	0:b56b6a05cad4	578	PUTSHORT(val, ucp); \
igorsk	0:b56b6a05cad4	579	}
igorsk	0:b56b6a05cad4	580	#define ADDCICHAP(opt, neg, val, digest) \
igorsk	0:b56b6a05cad4	581	if (neg) { \
igorsk	0:b56b6a05cad4	582	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAP opt=%d %X\n", opt, val)); \
igorsk	0:b56b6a05cad4	583	PUTCHAR(opt, ucp); \
igorsk	0:b56b6a05cad4	584	PUTCHAR(CILEN_CHAP, ucp); \
igorsk	0:b56b6a05cad4	585	PUTSHORT(val, ucp); \
igorsk	0:b56b6a05cad4	586	PUTCHAR(digest, ucp); \
igorsk	0:b56b6a05cad4	587	}
igorsk	0:b56b6a05cad4	588	#define ADDCILONG(opt, neg, val) \
igorsk	0:b56b6a05cad4	589	if (neg) { \
igorsk	0:b56b6a05cad4	590	LCPDEBUG(LOG_INFO, ("lcp_addci: L opt=%d %lX\n", opt, val)); \
igorsk	0:b56b6a05cad4	591	PUTCHAR(opt, ucp); \
igorsk	0:b56b6a05cad4	592	PUTCHAR(CILEN_LONG, ucp); \
igorsk	0:b56b6a05cad4	593	PUTLONG(val, ucp); \
igorsk	0:b56b6a05cad4	594	}
igorsk	0:b56b6a05cad4	595	#define ADDCILQR(opt, neg, val) \
igorsk	0:b56b6a05cad4	596	if (neg) { \
igorsk	0:b56b6a05cad4	597	LCPDEBUG(LOG_INFO, ("lcp_addci: LQR opt=%d %lX\n", opt, val)); \
igorsk	0:b56b6a05cad4	598	PUTCHAR(opt, ucp); \
igorsk	0:b56b6a05cad4	599	PUTCHAR(CILEN_LQR, ucp); \
igorsk	0:b56b6a05cad4	600	PUTSHORT(PPP_LQR, ucp); \
igorsk	0:b56b6a05cad4	601	PUTLONG(val, ucp); \
igorsk	0:b56b6a05cad4	602	}
igorsk	0:b56b6a05cad4	603	#define ADDCICHAR(opt, neg, val) \
igorsk	0:b56b6a05cad4	604	if (neg) { \
igorsk	0:b56b6a05cad4	605	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAR opt=%d %X '%z'\n", opt, val, val)); \
igorsk	0:b56b6a05cad4	606	PUTCHAR(opt, ucp); \
igorsk	0:b56b6a05cad4	607	PUTCHAR(CILEN_CHAR, ucp); \
igorsk	0:b56b6a05cad4	608	PUTCHAR(val, ucp); \
igorsk	0:b56b6a05cad4	609	}
igorsk	0:b56b6a05cad4	610
igorsk	0:b56b6a05cad4	611	ADDCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
igorsk	0:b56b6a05cad4	612	ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
igorsk	0:b56b6a05cad4	613	ADDCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
igorsk	0:b56b6a05cad4	614	ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
igorsk	0:b56b6a05cad4	615	ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
igorsk	0:b56b6a05cad4	616	ADDCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
igorsk	0:b56b6a05cad4	617	ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
igorsk	0:b56b6a05cad4	618	ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
igorsk	0:b56b6a05cad4	619	ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
igorsk	0:b56b6a05cad4	620
igorsk	0:b56b6a05cad4	621	if (ucp - start_ucp != *lenp) {
igorsk	0:b56b6a05cad4	622	/* this should never happen, because peer_mtu should be 1500 */
igorsk	0:b56b6a05cad4	623	LCPDEBUG(LOG_ERR, ("Bug in lcp_addci: wrong length\n"));
igorsk	0:b56b6a05cad4	624	}
igorsk	0:b56b6a05cad4	625	}
igorsk	0:b56b6a05cad4	626
igorsk	0:b56b6a05cad4	627
igorsk	0:b56b6a05cad4	628	/*
igorsk	0:b56b6a05cad4	629	* lcp_ackci - Ack our CIs.
igorsk	0:b56b6a05cad4	630	* This should not modify any state if the Ack is bad.
igorsk	0:b56b6a05cad4	631	*
igorsk	0:b56b6a05cad4	632	* Returns:
igorsk	0:b56b6a05cad4	633	* 0 - Ack was bad.
igorsk	0:b56b6a05cad4	634	* 1 - Ack was good.
igorsk	0:b56b6a05cad4	635	*/
igorsk	0:b56b6a05cad4	636	static int
igorsk	0:b56b6a05cad4	637	lcp_ackci(fsm f, u_char p, int len)
igorsk	0:b56b6a05cad4	638	{
igorsk	0:b56b6a05cad4	639	lcp_options *go = &lcp_gotoptions[f->unit];
igorsk	0:b56b6a05cad4	640	u_char cilen, citype, cichar;
igorsk	0:b56b6a05cad4	641	u_short cishort;
igorsk	0:b56b6a05cad4	642	u32_t cilong;
igorsk	0:b56b6a05cad4	643
igorsk	0:b56b6a05cad4	644	/*
igorsk	0:b56b6a05cad4	645	* CIs must be in exactly the same order that we sent.
igorsk	0:b56b6a05cad4	646	* Check packet length and CI length at each step.
igorsk	0:b56b6a05cad4	647	* If we find any deviations, then this packet is bad.
igorsk	0:b56b6a05cad4	648	*/
igorsk	0:b56b6a05cad4	649	#define ACKCIVOID(opt, neg) \
igorsk	0:b56b6a05cad4	650	if (neg) { \
igorsk	0:b56b6a05cad4	651	if ((len -= CILEN_VOID) < 0) \
igorsk	0:b56b6a05cad4	652	goto bad; \
igorsk	0:b56b6a05cad4	653	GETCHAR(citype, p); \
igorsk	0:b56b6a05cad4	654	GETCHAR(cilen, p); \
igorsk	0:b56b6a05cad4	655	if (cilen != CILEN_VOID \|\| citype != opt) \
igorsk	0:b56b6a05cad4	656	goto bad; \
igorsk	0:b56b6a05cad4	657	}
igorsk	0:b56b6a05cad4	658	#define ACKCISHORT(opt, neg, val) \
igorsk	0:b56b6a05cad4	659	if (neg) { \
igorsk	0:b56b6a05cad4	660	if ((len -= CILEN_SHORT) < 0) \
igorsk	0:b56b6a05cad4	661	goto bad; \
igorsk	0:b56b6a05cad4	662	GETCHAR(citype, p); \
igorsk	0:b56b6a05cad4	663	GETCHAR(cilen, p); \
igorsk	0:b56b6a05cad4	664	if (cilen != CILEN_SHORT \|\| citype != opt) \
igorsk	0:b56b6a05cad4	665	goto bad; \
igorsk	0:b56b6a05cad4	666	GETSHORT(cishort, p); \
igorsk	0:b56b6a05cad4	667	if (cishort != val) \
igorsk	0:b56b6a05cad4	668	goto bad; \
igorsk	0:b56b6a05cad4	669	}
igorsk	0:b56b6a05cad4	670	#define ACKCICHAR(opt, neg, val) \
igorsk	0:b56b6a05cad4	671	if (neg) { \
igorsk	0:b56b6a05cad4	672	if ((len -= CILEN_CHAR) < 0) \
igorsk	0:b56b6a05cad4	673	goto bad; \
igorsk	0:b56b6a05cad4	674	GETCHAR(citype, p); \
igorsk	0:b56b6a05cad4	675	GETCHAR(cilen, p); \
igorsk	0:b56b6a05cad4	676	if (cilen != CILEN_CHAR \|\| citype != opt) \
igorsk	0:b56b6a05cad4	677	goto bad; \
igorsk	0:b56b6a05cad4	678	GETCHAR(cichar, p); \
igorsk	0:b56b6a05cad4	679	if (cichar != val) \
igorsk	0:b56b6a05cad4	680	goto bad; \
igorsk	0:b56b6a05cad4	681	}
igorsk	0:b56b6a05cad4	682	#define ACKCICHAP(opt, neg, val, digest) \
igorsk	0:b56b6a05cad4	683	if (neg) { \
igorsk	0:b56b6a05cad4	684	if ((len -= CILEN_CHAP) < 0) \
igorsk	0:b56b6a05cad4	685	goto bad; \
igorsk	0:b56b6a05cad4	686	GETCHAR(citype, p); \
igorsk	0:b56b6a05cad4	687	GETCHAR(cilen, p); \
igorsk	0:b56b6a05cad4	688	if (cilen != CILEN_CHAP \|\| citype != opt) \
igorsk	0:b56b6a05cad4	689	goto bad; \
igorsk	0:b56b6a05cad4	690	GETSHORT(cishort, p); \
igorsk	0:b56b6a05cad4	691	if (cishort != val) \
igorsk	0:b56b6a05cad4	692	goto bad; \
igorsk	0:b56b6a05cad4	693	GETCHAR(cichar, p); \
igorsk	0:b56b6a05cad4	694	if (cichar != digest) \
igorsk	0:b56b6a05cad4	695	goto bad; \
igorsk	0:b56b6a05cad4	696	}
igorsk	0:b56b6a05cad4	697	#define ACKCILONG(opt, neg, val) \
igorsk	0:b56b6a05cad4	698	if (neg) { \
igorsk	0:b56b6a05cad4	699	if ((len -= CILEN_LONG) < 0) \
igorsk	0:b56b6a05cad4	700	goto bad; \
igorsk	0:b56b6a05cad4	701	GETCHAR(citype, p); \
igorsk	0:b56b6a05cad4	702	GETCHAR(cilen, p); \
igorsk	0:b56b6a05cad4	703	if (cilen != CILEN_LONG \|\| citype != opt) \
igorsk	0:b56b6a05cad4	704	goto bad; \
igorsk	0:b56b6a05cad4	705	GETLONG(cilong, p); \
igorsk	0:b56b6a05cad4	706	if (cilong != val) \
igorsk	0:b56b6a05cad4	707	goto bad; \
igorsk	0:b56b6a05cad4	708	}
igorsk	0:b56b6a05cad4	709	#define ACKCILQR(opt, neg, val) \
igorsk	0:b56b6a05cad4	710	if (neg) { \
igorsk	0:b56b6a05cad4	711	if ((len -= CILEN_LQR) < 0) \
igorsk	0:b56b6a05cad4	712	goto bad; \
igorsk	0:b56b6a05cad4	713	GETCHAR(citype, p); \
igorsk	0:b56b6a05cad4	714	GETCHAR(cilen, p); \
igorsk	0:b56b6a05cad4	715	if (cilen != CILEN_LQR \|\| citype != opt) \
igorsk	0:b56b6a05cad4	716	goto bad; \
igorsk	0:b56b6a05cad4	717	GETSHORT(cishort, p); \
igorsk	0:b56b6a05cad4	718	if (cishort != PPP_LQR) \
igorsk	0:b56b6a05cad4	719	goto bad; \
igorsk	0:b56b6a05cad4	720	GETLONG(cilong, p); \
igorsk	0:b56b6a05cad4	721	if (cilong != val) \
igorsk	0:b56b6a05cad4	722	goto bad; \
igorsk	0:b56b6a05cad4	723	}
igorsk	0:b56b6a05cad4	724
igorsk	0:b56b6a05cad4	725	ACKCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
igorsk	0:b56b6a05cad4	726	ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
igorsk	0:b56b6a05cad4	727	ACKCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
igorsk	0:b56b6a05cad4	728	ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
igorsk	0:b56b6a05cad4	729	ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
igorsk	0:b56b6a05cad4	730	ACKCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
igorsk	0:b56b6a05cad4	731	ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
igorsk	0:b56b6a05cad4	732	ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
igorsk	0:b56b6a05cad4	733	ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
igorsk	0:b56b6a05cad4	734
igorsk	0:b56b6a05cad4	735	/*
igorsk	0:b56b6a05cad4	736	* If there are any remaining CIs, then this packet is bad.
igorsk	0:b56b6a05cad4	737	*/
igorsk	0:b56b6a05cad4	738	if (len != 0) {
igorsk	0:b56b6a05cad4	739	goto bad;
igorsk	0:b56b6a05cad4	740	}
igorsk	0:b56b6a05cad4	741	LCPDEBUG(LOG_INFO, ("lcp_acki: Ack\n"));
igorsk	0:b56b6a05cad4	742	return (1);
igorsk	0:b56b6a05cad4	743	bad:
igorsk	0:b56b6a05cad4	744	LCPDEBUG(LOG_WARNING, ("lcp_acki: received bad Ack!\n"));
igorsk	0:b56b6a05cad4	745	return (0);
igorsk	0:b56b6a05cad4	746	}
igorsk	0:b56b6a05cad4	747
igorsk	0:b56b6a05cad4	748
igorsk	0:b56b6a05cad4	749	/*
igorsk	0:b56b6a05cad4	750	* lcp_nakci - Peer has sent a NAK for some of our CIs.
igorsk	0:b56b6a05cad4	751	* This should not modify any state if the Nak is bad
igorsk	0:b56b6a05cad4	752	* or if LCP is in the LS_OPENED state.
igorsk	0:b56b6a05cad4	753	*
igorsk	0:b56b6a05cad4	754	* Returns:
igorsk	0:b56b6a05cad4	755	* 0 - Nak was bad.
igorsk	0:b56b6a05cad4	756	* 1 - Nak was good.
igorsk	0:b56b6a05cad4	757	*/
igorsk	0:b56b6a05cad4	758	static int
igorsk	0:b56b6a05cad4	759	lcp_nakci(fsm f, u_char p, int len)
igorsk	0:b56b6a05cad4	760	{
igorsk	0:b56b6a05cad4	761	lcp_options *go = &lcp_gotoptions[f->unit];
igorsk	0:b56b6a05cad4	762	lcp_options *wo = &lcp_wantoptions[f->unit];
igorsk	0:b56b6a05cad4	763	u_char citype, cichar, *next;
igorsk	0:b56b6a05cad4	764	u_short cishort;
igorsk	0:b56b6a05cad4	765	u32_t cilong;
igorsk	0:b56b6a05cad4	766	lcp_options no; /* options we've seen Naks for */
igorsk	0:b56b6a05cad4	767	lcp_options try; /* options to request next time */
igorsk	0:b56b6a05cad4	768	int looped_back = 0;
igorsk	0:b56b6a05cad4	769	int cilen;
igorsk	0:b56b6a05cad4	770
igorsk	0:b56b6a05cad4	771	BZERO(&no, sizeof(no));
igorsk	0:b56b6a05cad4	772	try = *go;
igorsk	0:b56b6a05cad4	773
igorsk	0:b56b6a05cad4	774	/*
igorsk	0:b56b6a05cad4	775	* Any Nak'd CIs must be in exactly the same order that we sent.
igorsk	0:b56b6a05cad4	776	* Check packet length and CI length at each step.
igorsk	0:b56b6a05cad4	777	* If we find any deviations, then this packet is bad.
igorsk	0:b56b6a05cad4	778	*/
igorsk	0:b56b6a05cad4	779	#define NAKCIVOID(opt, neg, code) \
igorsk	0:b56b6a05cad4	780	if (go->neg && \
igorsk	0:b56b6a05cad4	781	len >= CILEN_VOID && \
igorsk	0:b56b6a05cad4	782	p[1] == CILEN_VOID && \
igorsk	0:b56b6a05cad4	783	p[0] == opt) { \
igorsk	0:b56b6a05cad4	784	len -= CILEN_VOID; \
igorsk	0:b56b6a05cad4	785	INCPTR(CILEN_VOID, p); \
igorsk	0:b56b6a05cad4	786	no.neg = 1; \
igorsk	0:b56b6a05cad4	787	code \
igorsk	0:b56b6a05cad4	788	}
igorsk	0:b56b6a05cad4	789	#define NAKCICHAP(opt, neg, code) \
igorsk	0:b56b6a05cad4	790	if (go->neg && \
igorsk	0:b56b6a05cad4	791	len >= CILEN_CHAP && \
igorsk	0:b56b6a05cad4	792	p[1] == CILEN_CHAP && \
igorsk	0:b56b6a05cad4	793	p[0] == opt) { \
igorsk	0:b56b6a05cad4	794	len -= CILEN_CHAP; \
igorsk	0:b56b6a05cad4	795	INCPTR(2, p); \
igorsk	0:b56b6a05cad4	796	GETSHORT(cishort, p); \
igorsk	0:b56b6a05cad4	797	GETCHAR(cichar, p); \
igorsk	0:b56b6a05cad4	798	no.neg = 1; \
igorsk	0:b56b6a05cad4	799	code \
igorsk	0:b56b6a05cad4	800	}
igorsk	0:b56b6a05cad4	801	#define NAKCICHAR(opt, neg, code) \
igorsk	0:b56b6a05cad4	802	if (go->neg && \
igorsk	0:b56b6a05cad4	803	len >= CILEN_CHAR && \
igorsk	0:b56b6a05cad4	804	p[1] == CILEN_CHAR && \
igorsk	0:b56b6a05cad4	805	p[0] == opt) { \
igorsk	0:b56b6a05cad4	806	len -= CILEN_CHAR; \
igorsk	0:b56b6a05cad4	807	INCPTR(2, p); \
igorsk	0:b56b6a05cad4	808	GETCHAR(cichar, p); \
igorsk	0:b56b6a05cad4	809	no.neg = 1; \
igorsk	0:b56b6a05cad4	810	code \
igorsk	0:b56b6a05cad4	811	}
igorsk	0:b56b6a05cad4	812	#define NAKCISHORT(opt, neg, code) \
igorsk	0:b56b6a05cad4	813	if (go->neg && \
igorsk	0:b56b6a05cad4	814	len >= CILEN_SHORT && \
igorsk	0:b56b6a05cad4	815	p[1] == CILEN_SHORT && \
igorsk	0:b56b6a05cad4	816	p[0] == opt) { \
igorsk	0:b56b6a05cad4	817	len -= CILEN_SHORT; \
igorsk	0:b56b6a05cad4	818	INCPTR(2, p); \
igorsk	0:b56b6a05cad4	819	GETSHORT(cishort, p); \
igorsk	0:b56b6a05cad4	820	no.neg = 1; \
igorsk	0:b56b6a05cad4	821	code \
igorsk	0:b56b6a05cad4	822	}
igorsk	0:b56b6a05cad4	823	#define NAKCILONG(opt, neg, code) \
igorsk	0:b56b6a05cad4	824	if (go->neg && \
igorsk	0:b56b6a05cad4	825	len >= CILEN_LONG && \
igorsk	0:b56b6a05cad4	826	p[1] == CILEN_LONG && \
igorsk	0:b56b6a05cad4	827	p[0] == opt) { \
igorsk	0:b56b6a05cad4	828	len -= CILEN_LONG; \
igorsk	0:b56b6a05cad4	829	INCPTR(2, p); \
igorsk	0:b56b6a05cad4	830	GETLONG(cilong, p); \
igorsk	0:b56b6a05cad4	831	no.neg = 1; \
igorsk	0:b56b6a05cad4	832	code \
igorsk	0:b56b6a05cad4	833	}
igorsk	0:b56b6a05cad4	834	#define NAKCILQR(opt, neg, code) \
igorsk	0:b56b6a05cad4	835	if (go->neg && \
igorsk	0:b56b6a05cad4	836	len >= CILEN_LQR && \
igorsk	0:b56b6a05cad4	837	p[1] == CILEN_LQR && \
igorsk	0:b56b6a05cad4	838	p[0] == opt) { \
igorsk	0:b56b6a05cad4	839	len -= CILEN_LQR; \
igorsk	0:b56b6a05cad4	840	INCPTR(2, p); \
igorsk	0:b56b6a05cad4	841	GETSHORT(cishort, p); \
igorsk	0:b56b6a05cad4	842	GETLONG(cilong, p); \
igorsk	0:b56b6a05cad4	843	no.neg = 1; \
igorsk	0:b56b6a05cad4	844	code \
igorsk	0:b56b6a05cad4	845	}
igorsk	0:b56b6a05cad4	846
igorsk	0:b56b6a05cad4	847	/*
igorsk	0:b56b6a05cad4	848	* We don't care if they want to send us smaller packets than
igorsk	0:b56b6a05cad4	849	* we want. Therefore, accept any MRU less than what we asked for,
igorsk	0:b56b6a05cad4	850	* but then ignore the new value when setting the MRU in the kernel.
igorsk	0:b56b6a05cad4	851	* If they send us a bigger MRU than what we asked, accept it, up to
igorsk	0:b56b6a05cad4	852	* the limit of the default MRU we'd get if we didn't negotiate.
igorsk	0:b56b6a05cad4	853	*/
igorsk	0:b56b6a05cad4	854	if (go->neg_mru && go->mru != PPP_DEFMRU) {
igorsk	0:b56b6a05cad4	855	NAKCISHORT(CI_MRU, neg_mru,
igorsk	0:b56b6a05cad4	856	if (cishort <= wo->mru \|\| cishort < PPP_DEFMRU) {
igorsk	0:b56b6a05cad4	857	try.mru = cishort;
igorsk	0:b56b6a05cad4	858	}
igorsk	0:b56b6a05cad4	859	);
igorsk	0:b56b6a05cad4	860	}
igorsk	0:b56b6a05cad4	861
igorsk	0:b56b6a05cad4	862	/*
igorsk	0:b56b6a05cad4	863	* Add any characters they want to our (receive-side) asyncmap.
igorsk	0:b56b6a05cad4	864	*/
igorsk	0:b56b6a05cad4	865	if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) {
igorsk	0:b56b6a05cad4	866	NAKCILONG(CI_ASYNCMAP, neg_asyncmap,
igorsk	0:b56b6a05cad4	867	try.asyncmap = go->asyncmap \| cilong;
igorsk	0:b56b6a05cad4	868	);
igorsk	0:b56b6a05cad4	869	}
igorsk	0:b56b6a05cad4	870
igorsk	0:b56b6a05cad4	871	/*
igorsk	0:b56b6a05cad4	872	* If they've nak'd our authentication-protocol, check whether
igorsk	0:b56b6a05cad4	873	* they are proposing a different protocol, or a different
igorsk	0:b56b6a05cad4	874	* hash algorithm for CHAP.
igorsk	0:b56b6a05cad4	875	*/
igorsk	0:b56b6a05cad4	876	if ((go->neg_chap \|\| go->neg_upap)
igorsk	0:b56b6a05cad4	877	&& len >= CILEN_SHORT
igorsk	0:b56b6a05cad4	878	&& p[0] == CI_AUTHTYPE && p[1] >= CILEN_SHORT && p[1] <= len) {
igorsk	0:b56b6a05cad4	879	cilen = p[1];
igorsk	0:b56b6a05cad4	880	len -= cilen;
igorsk	0:b56b6a05cad4	881	no.neg_chap = go->neg_chap;
igorsk	0:b56b6a05cad4	882	no.neg_upap = go->neg_upap;
igorsk	0:b56b6a05cad4	883	INCPTR(2, p);
igorsk	0:b56b6a05cad4	884	GETSHORT(cishort, p);
igorsk	0:b56b6a05cad4	885	if (cishort == PPP_PAP && cilen == CILEN_SHORT) {
igorsk	0:b56b6a05cad4	886	/*
igorsk	0:b56b6a05cad4	887	* If we were asking for CHAP, they obviously don't want to do it.
igorsk	0:b56b6a05cad4	888	* If we weren't asking for CHAP, then we were asking for PAP,
igorsk	0:b56b6a05cad4	889	* in which case this Nak is bad.
igorsk	0:b56b6a05cad4	890	*/
igorsk	0:b56b6a05cad4	891	if (!go->neg_chap) {
igorsk	0:b56b6a05cad4	892	goto bad;
igorsk	0:b56b6a05cad4	893	}
igorsk	0:b56b6a05cad4	894	try.neg_chap = 0;
igorsk	0:b56b6a05cad4	895
igorsk	0:b56b6a05cad4	896	} else if (cishort == PPP_CHAP && cilen == CILEN_CHAP) {
igorsk	0:b56b6a05cad4	897	GETCHAR(cichar, p);
igorsk	0:b56b6a05cad4	898	if (go->neg_chap) {
igorsk	0:b56b6a05cad4	899	/*
igorsk	0:b56b6a05cad4	900	* We were asking for CHAP/MD5; they must want a different
igorsk	0:b56b6a05cad4	901	* algorithm. If they can't do MD5, we'll have to stop
igorsk	0:b56b6a05cad4	902	* asking for CHAP.
igorsk	0:b56b6a05cad4	903	*/
igorsk	0:b56b6a05cad4	904	if (cichar != go->chap_mdtype) {
igorsk	0:b56b6a05cad4	905	try.neg_chap = 0;
igorsk	0:b56b6a05cad4	906	}
igorsk	0:b56b6a05cad4	907	} else {
igorsk	0:b56b6a05cad4	908	/*
igorsk	0:b56b6a05cad4	909	* Stop asking for PAP if we were asking for it.
igorsk	0:b56b6a05cad4	910	*/
igorsk	0:b56b6a05cad4	911	try.neg_upap = 0;
igorsk	0:b56b6a05cad4	912	}
igorsk	0:b56b6a05cad4	913
igorsk	0:b56b6a05cad4	914	} else {
igorsk	0:b56b6a05cad4	915	/*
igorsk	0:b56b6a05cad4	916	* We don't recognize what they're suggesting.
igorsk	0:b56b6a05cad4	917	* Stop asking for what we were asking for.
igorsk	0:b56b6a05cad4	918	*/
igorsk	0:b56b6a05cad4	919	if (go->neg_chap) {
igorsk	0:b56b6a05cad4	920	try.neg_chap = 0;
igorsk	0:b56b6a05cad4	921	} else {
igorsk	0:b56b6a05cad4	922	try.neg_upap = 0;
igorsk	0:b56b6a05cad4	923	}
igorsk	0:b56b6a05cad4	924	p += cilen - CILEN_SHORT;
igorsk	0:b56b6a05cad4	925	}
igorsk	0:b56b6a05cad4	926	}
igorsk	0:b56b6a05cad4	927
igorsk	0:b56b6a05cad4	928	/*
igorsk	0:b56b6a05cad4	929	* If they can't cope with our link quality protocol, we'll have
igorsk	0:b56b6a05cad4	930	* to stop asking for LQR. We haven't got any other protocol.
igorsk	0:b56b6a05cad4	931	* If they Nak the reporting period, take their value XXX ?
igorsk	0:b56b6a05cad4	932	*/
igorsk	0:b56b6a05cad4	933	NAKCILQR(CI_QUALITY, neg_lqr,
igorsk	0:b56b6a05cad4	934	if (cishort != PPP_LQR) {
igorsk	0:b56b6a05cad4	935	try.neg_lqr = 0;
igorsk	0:b56b6a05cad4	936	} else {
igorsk	0:b56b6a05cad4	937	try.lqr_period = cilong;
igorsk	0:b56b6a05cad4	938	}
igorsk	0:b56b6a05cad4	939	);
igorsk	0:b56b6a05cad4	940
igorsk	0:b56b6a05cad4	941	/*
igorsk	0:b56b6a05cad4	942	* Only implementing CBCP...not the rest of the callback options
igorsk	0:b56b6a05cad4	943	*/
igorsk	0:b56b6a05cad4	944	NAKCICHAR(CI_CALLBACK, neg_cbcp,
igorsk	0:b56b6a05cad4	945	try.neg_cbcp = 0;
igorsk	0:b56b6a05cad4	946	);
igorsk	0:b56b6a05cad4	947
igorsk	0:b56b6a05cad4	948	/*
igorsk	0:b56b6a05cad4	949	* Check for a looped-back line.
igorsk	0:b56b6a05cad4	950	*/
igorsk	0:b56b6a05cad4	951	NAKCILONG(CI_MAGICNUMBER, neg_magicnumber,
igorsk	0:b56b6a05cad4	952	try.magicnumber = magic();
igorsk	0:b56b6a05cad4	953	looped_back = 1;
igorsk	0:b56b6a05cad4	954	);
igorsk	0:b56b6a05cad4	955
igorsk	0:b56b6a05cad4	956	/*
igorsk	0:b56b6a05cad4	957	* Peer shouldn't send Nak for protocol compression or
igorsk	0:b56b6a05cad4	958	* address/control compression requests; they should send
igorsk	0:b56b6a05cad4	959	* a Reject instead. If they send a Nak, treat it as a Reject.
igorsk	0:b56b6a05cad4	960	*/
igorsk	0:b56b6a05cad4	961	NAKCIVOID(CI_PCOMPRESSION, neg_pcompression,
igorsk	0:b56b6a05cad4	962	try.neg_pcompression = 0;
igorsk	0:b56b6a05cad4	963	);
igorsk	0:b56b6a05cad4	964	NAKCIVOID(CI_ACCOMPRESSION, neg_accompression,
igorsk	0:b56b6a05cad4	965	try.neg_accompression = 0;
igorsk	0:b56b6a05cad4	966	);
igorsk	0:b56b6a05cad4	967
igorsk	0:b56b6a05cad4	968	/*
igorsk	0:b56b6a05cad4	969	* There may be remaining CIs, if the peer is requesting negotiation
igorsk	0:b56b6a05cad4	970	* on an option that we didn't include in our request packet.
igorsk	0:b56b6a05cad4	971	* If we see an option that we requested, or one we've already seen
igorsk	0:b56b6a05cad4	972	* in this packet, then this packet is bad.
igorsk	0:b56b6a05cad4	973	* If we wanted to respond by starting to negotiate on the requested
igorsk	0:b56b6a05cad4	974	* option(s), we could, but we don't, because except for the
igorsk	0:b56b6a05cad4	975	* authentication type and quality protocol, if we are not negotiating
igorsk	0:b56b6a05cad4	976	* an option, it is because we were told not to.
igorsk	0:b56b6a05cad4	977	* For the authentication type, the Nak from the peer means
igorsk	0:b56b6a05cad4	978	* `let me authenticate myself with you' which is a bit pointless.
igorsk	0:b56b6a05cad4	979	* For the quality protocol, the Nak means `ask me to send you quality
igorsk	0:b56b6a05cad4	980	* reports', but if we didn't ask for them, we don't want them.
igorsk	0:b56b6a05cad4	981	* An option we don't recognize represents the peer asking to
igorsk	0:b56b6a05cad4	982	* negotiate some option we don't support, so ignore it.
igorsk	0:b56b6a05cad4	983	*/
igorsk	0:b56b6a05cad4	984	while (len > CILEN_VOID) {
igorsk	0:b56b6a05cad4	985	GETCHAR(citype, p);
igorsk	0:b56b6a05cad4	986	GETCHAR(cilen, p);
igorsk	0:b56b6a05cad4	987	if (cilen < CILEN_VOID \|\| (len -= cilen) < 0) {
igorsk	0:b56b6a05cad4	988	goto bad;
igorsk	0:b56b6a05cad4	989	}
igorsk	0:b56b6a05cad4	990	next = p + cilen - 2;
igorsk	0:b56b6a05cad4	991
igorsk	0:b56b6a05cad4	992	switch (citype) {
igorsk	0:b56b6a05cad4	993	case CI_MRU:
igorsk	0:b56b6a05cad4	994	if ((go->neg_mru && go->mru != PPP_DEFMRU)
igorsk	0:b56b6a05cad4	995	\|\| no.neg_mru \|\| cilen != CILEN_SHORT) {
igorsk	0:b56b6a05cad4	996	goto bad;
igorsk	0:b56b6a05cad4	997	}
igorsk	0:b56b6a05cad4	998	GETSHORT(cishort, p);
igorsk	0:b56b6a05cad4	999	if (cishort < PPP_DEFMRU) {
igorsk	0:b56b6a05cad4	1000	try.mru = cishort;
igorsk	0:b56b6a05cad4	1001	}
igorsk	0:b56b6a05cad4	1002	break;
igorsk	0:b56b6a05cad4	1003	case CI_ASYNCMAP:
igorsk	0:b56b6a05cad4	1004	if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl)
igorsk	0:b56b6a05cad4	1005	\|\| no.neg_asyncmap \|\| cilen != CILEN_LONG) {
igorsk	0:b56b6a05cad4	1006	goto bad;
igorsk	0:b56b6a05cad4	1007	}
igorsk	0:b56b6a05cad4	1008	break;
igorsk	0:b56b6a05cad4	1009	case CI_AUTHTYPE:
igorsk	0:b56b6a05cad4	1010	if (go->neg_chap \|\| no.neg_chap \|\| go->neg_upap \|\| no.neg_upap) {
igorsk	0:b56b6a05cad4	1011	goto bad;
igorsk	0:b56b6a05cad4	1012	}
igorsk	0:b56b6a05cad4	1013	break;
igorsk	0:b56b6a05cad4	1014	case CI_MAGICNUMBER:
igorsk	0:b56b6a05cad4	1015	if (go->neg_magicnumber \|\| no.neg_magicnumber \|\|
igorsk	0:b56b6a05cad4	1016	cilen != CILEN_LONG) {
igorsk	0:b56b6a05cad4	1017	goto bad;
igorsk	0:b56b6a05cad4	1018	}
igorsk	0:b56b6a05cad4	1019	break;
igorsk	0:b56b6a05cad4	1020	case CI_PCOMPRESSION:
igorsk	0:b56b6a05cad4	1021	if (go->neg_pcompression \|\| no.neg_pcompression
igorsk	0:b56b6a05cad4	1022	\|\| cilen != CILEN_VOID) {
igorsk	0:b56b6a05cad4	1023	goto bad;
igorsk	0:b56b6a05cad4	1024	}
igorsk	0:b56b6a05cad4	1025	break;
igorsk	0:b56b6a05cad4	1026	case CI_ACCOMPRESSION:
igorsk	0:b56b6a05cad4	1027	if (go->neg_accompression \|\| no.neg_accompression
igorsk	0:b56b6a05cad4	1028	\|\| cilen != CILEN_VOID) {
igorsk	0:b56b6a05cad4	1029	goto bad;
igorsk	0:b56b6a05cad4	1030	}
igorsk	0:b56b6a05cad4	1031	break;
igorsk	0:b56b6a05cad4	1032	case CI_QUALITY:
igorsk	0:b56b6a05cad4	1033	if (go->neg_lqr \|\| no.neg_lqr \|\| cilen != CILEN_LQR) {
igorsk	0:b56b6a05cad4	1034	goto bad;
igorsk	0:b56b6a05cad4	1035	}
igorsk	0:b56b6a05cad4	1036	break;
igorsk	0:b56b6a05cad4	1037	}
igorsk	0:b56b6a05cad4	1038	p = next;
igorsk	0:b56b6a05cad4	1039	}
igorsk	0:b56b6a05cad4	1040
igorsk	0:b56b6a05cad4	1041	/* If there is still anything left, this packet is bad. */
igorsk	0:b56b6a05cad4	1042	if (len != 0) {
igorsk	0:b56b6a05cad4	1043	goto bad;
igorsk	0:b56b6a05cad4	1044	}
igorsk	0:b56b6a05cad4	1045
igorsk	0:b56b6a05cad4	1046	/*
igorsk	0:b56b6a05cad4	1047	* OK, the Nak is good. Now we can update state.
igorsk	0:b56b6a05cad4	1048	*/
igorsk	0:b56b6a05cad4	1049	if (f->state != LS_OPENED) {
igorsk	0:b56b6a05cad4	1050	if (looped_back) {
igorsk	0:b56b6a05cad4	1051	if (++try.numloops >= lcp_loopbackfail) {
igorsk	0:b56b6a05cad4	1052	LCPDEBUG(LOG_NOTICE, ("Serial line is looped back.\n"));
igorsk	0:b56b6a05cad4	1053	lcp_close(f->unit, "Loopback detected");
igorsk	0:b56b6a05cad4	1054	}
igorsk	0:b56b6a05cad4	1055	} else {
igorsk	0:b56b6a05cad4	1056	try.numloops = 0;
igorsk	0:b56b6a05cad4	1057	}
igorsk	0:b56b6a05cad4	1058	*go = try;
igorsk	0:b56b6a05cad4	1059	}
igorsk	0:b56b6a05cad4	1060
igorsk	0:b56b6a05cad4	1061	return 1;
igorsk	0:b56b6a05cad4	1062
igorsk	0:b56b6a05cad4	1063	bad:
igorsk	0:b56b6a05cad4	1064	LCPDEBUG(LOG_WARNING, ("lcp_nakci: received bad Nak!\n"));
igorsk	0:b56b6a05cad4	1065	return 0;
igorsk	0:b56b6a05cad4	1066	}
igorsk	0:b56b6a05cad4	1067
igorsk	0:b56b6a05cad4	1068
igorsk	0:b56b6a05cad4	1069	/*
igorsk	0:b56b6a05cad4	1070	* lcp_rejci - Peer has Rejected some of our CIs.
igorsk	0:b56b6a05cad4	1071	* This should not modify any state if the Reject is bad
igorsk	0:b56b6a05cad4	1072	* or if LCP is in the LS_OPENED state.
igorsk	0:b56b6a05cad4	1073	*
igorsk	0:b56b6a05cad4	1074	* Returns:
igorsk	0:b56b6a05cad4	1075	* 0 - Reject was bad.
igorsk	0:b56b6a05cad4	1076	* 1 - Reject was good.
igorsk	0:b56b6a05cad4	1077	*/
igorsk	0:b56b6a05cad4	1078	static int
igorsk	0:b56b6a05cad4	1079	lcp_rejci(fsm f, u_char p, int len)
igorsk	0:b56b6a05cad4	1080	{
igorsk	0:b56b6a05cad4	1081	lcp_options *go = &lcp_gotoptions[f->unit];
igorsk	0:b56b6a05cad4	1082	u_char cichar;
igorsk	0:b56b6a05cad4	1083	u_short cishort;
igorsk	0:b56b6a05cad4	1084	u32_t cilong;
igorsk	0:b56b6a05cad4	1085	lcp_options try; /* options to request next time */
igorsk	0:b56b6a05cad4	1086
igorsk	0:b56b6a05cad4	1087	try = *go;
igorsk	0:b56b6a05cad4	1088
igorsk	0:b56b6a05cad4	1089	/*
igorsk	0:b56b6a05cad4	1090	* Any Rejected CIs must be in exactly the same order that we sent.
igorsk	0:b56b6a05cad4	1091	* Check packet length and CI length at each step.
igorsk	0:b56b6a05cad4	1092	* If we find any deviations, then this packet is bad.
igorsk	0:b56b6a05cad4	1093	*/
igorsk	0:b56b6a05cad4	1094	#define REJCIVOID(opt, neg) \
igorsk	0:b56b6a05cad4	1095	if (go->neg && \
igorsk	0:b56b6a05cad4	1096	len >= CILEN_VOID && \
igorsk	0:b56b6a05cad4	1097	p[1] == CILEN_VOID && \
igorsk	0:b56b6a05cad4	1098	p[0] == opt) { \
igorsk	0:b56b6a05cad4	1099	len -= CILEN_VOID; \
igorsk	0:b56b6a05cad4	1100	INCPTR(CILEN_VOID, p); \
igorsk	0:b56b6a05cad4	1101	try.neg = 0; \
igorsk	0:b56b6a05cad4	1102	LCPDEBUG(LOG_INFO, ("lcp_rejci: void opt %d rejected\n", opt)); \
igorsk	0:b56b6a05cad4	1103	}
igorsk	0:b56b6a05cad4	1104	#define REJCISHORT(opt, neg, val) \
igorsk	0:b56b6a05cad4	1105	if (go->neg && \
igorsk	0:b56b6a05cad4	1106	len >= CILEN_SHORT && \
igorsk	0:b56b6a05cad4	1107	p[1] == CILEN_SHORT && \
igorsk	0:b56b6a05cad4	1108	p[0] == opt) { \
igorsk	0:b56b6a05cad4	1109	len -= CILEN_SHORT; \
igorsk	0:b56b6a05cad4	1110	INCPTR(2, p); \
igorsk	0:b56b6a05cad4	1111	GETSHORT(cishort, p); \
igorsk	0:b56b6a05cad4	1112	/* Check rejected value. */ \
igorsk	0:b56b6a05cad4	1113	if (cishort != val) { \
igorsk	0:b56b6a05cad4	1114	goto bad; \
igorsk	0:b56b6a05cad4	1115	} \
igorsk	0:b56b6a05cad4	1116	try.neg = 0; \
igorsk	0:b56b6a05cad4	1117	LCPDEBUG(LOG_INFO, ("lcp_rejci: short opt %d rejected\n", opt)); \
igorsk	0:b56b6a05cad4	1118	}
igorsk	0:b56b6a05cad4	1119	#define REJCICHAP(opt, neg, val, digest) \
igorsk	0:b56b6a05cad4	1120	if (go->neg && \
igorsk	0:b56b6a05cad4	1121	len >= CILEN_CHAP && \
igorsk	0:b56b6a05cad4	1122	p[1] == CILEN_CHAP && \
igorsk	0:b56b6a05cad4	1123	p[0] == opt) { \
igorsk	0:b56b6a05cad4	1124	len -= CILEN_CHAP; \
igorsk	0:b56b6a05cad4	1125	INCPTR(2, p); \
igorsk	0:b56b6a05cad4	1126	GETSHORT(cishort, p); \
igorsk	0:b56b6a05cad4	1127	GETCHAR(cichar, p); \
igorsk	0:b56b6a05cad4	1128	/* Check rejected value. */ \
igorsk	0:b56b6a05cad4	1129	if (cishort != val \|\| cichar != digest) { \
igorsk	0:b56b6a05cad4	1130	goto bad; \
igorsk	0:b56b6a05cad4	1131	} \
igorsk	0:b56b6a05cad4	1132	try.neg = 0; \
igorsk	0:b56b6a05cad4	1133	try.neg_upap = 0; \
igorsk	0:b56b6a05cad4	1134	LCPDEBUG(LOG_INFO, ("lcp_rejci: chap opt %d rejected\n", opt)); \
igorsk	0:b56b6a05cad4	1135	}
igorsk	0:b56b6a05cad4	1136	#define REJCILONG(opt, neg, val) \
igorsk	0:b56b6a05cad4	1137	if (go->neg && \
igorsk	0:b56b6a05cad4	1138	len >= CILEN_LONG && \
igorsk	0:b56b6a05cad4	1139	p[1] == CILEN_LONG && \
igorsk	0:b56b6a05cad4	1140	p[0] == opt) { \
igorsk	0:b56b6a05cad4	1141	len -= CILEN_LONG; \
igorsk	0:b56b6a05cad4	1142	INCPTR(2, p); \
igorsk	0:b56b6a05cad4	1143	GETLONG(cilong, p); \
igorsk	0:b56b6a05cad4	1144	/* Check rejected value. */ \
igorsk	0:b56b6a05cad4	1145	if (cilong != val) { \
igorsk	0:b56b6a05cad4	1146	goto bad; \
igorsk	0:b56b6a05cad4	1147	} \
igorsk	0:b56b6a05cad4	1148	try.neg = 0; \
igorsk	0:b56b6a05cad4	1149	LCPDEBUG(LOG_INFO, ("lcp_rejci: long opt %d rejected\n", opt)); \
igorsk	0:b56b6a05cad4	1150	}
igorsk	0:b56b6a05cad4	1151	#define REJCILQR(opt, neg, val) \
igorsk	0:b56b6a05cad4	1152	if (go->neg && \
igorsk	0:b56b6a05cad4	1153	len >= CILEN_LQR && \
igorsk	0:b56b6a05cad4	1154	p[1] == CILEN_LQR && \
igorsk	0:b56b6a05cad4	1155	p[0] == opt) { \
igorsk	0:b56b6a05cad4	1156	len -= CILEN_LQR; \
igorsk	0:b56b6a05cad4	1157	INCPTR(2, p); \
igorsk	0:b56b6a05cad4	1158	GETSHORT(cishort, p); \
igorsk	0:b56b6a05cad4	1159	GETLONG(cilong, p); \
igorsk	0:b56b6a05cad4	1160	/* Check rejected value. */ \
igorsk	0:b56b6a05cad4	1161	if (cishort != PPP_LQR \|\| cilong != val) { \
igorsk	0:b56b6a05cad4	1162	goto bad; \
igorsk	0:b56b6a05cad4	1163	} \
igorsk	0:b56b6a05cad4	1164	try.neg = 0; \
igorsk	0:b56b6a05cad4	1165	LCPDEBUG(LOG_INFO, ("lcp_rejci: LQR opt %d rejected\n", opt)); \
igorsk	0:b56b6a05cad4	1166	}
igorsk	0:b56b6a05cad4	1167	#define REJCICBCP(opt, neg, val) \
igorsk	0:b56b6a05cad4	1168	if (go->neg && \
igorsk	0:b56b6a05cad4	1169	len >= CILEN_CBCP && \
igorsk	0:b56b6a05cad4	1170	p[1] == CILEN_CBCP && \
igorsk	0:b56b6a05cad4	1171	p[0] == opt) { \
igorsk	0:b56b6a05cad4	1172	len -= CILEN_CBCP; \
igorsk	0:b56b6a05cad4	1173	INCPTR(2, p); \
igorsk	0:b56b6a05cad4	1174	GETCHAR(cichar, p); \
igorsk	0:b56b6a05cad4	1175	/* Check rejected value. */ \
igorsk	0:b56b6a05cad4	1176	if (cichar != val) { \
igorsk	0:b56b6a05cad4	1177	goto bad; \
igorsk	0:b56b6a05cad4	1178	} \
igorsk	0:b56b6a05cad4	1179	try.neg = 0; \
igorsk	0:b56b6a05cad4	1180	LCPDEBUG(LOG_INFO, ("lcp_rejci: Callback opt %d rejected\n", opt)); \
igorsk	0:b56b6a05cad4	1181	}
igorsk	0:b56b6a05cad4	1182
igorsk	0:b56b6a05cad4	1183	REJCISHORT(CI_MRU, neg_mru, go->mru);
igorsk	0:b56b6a05cad4	1184	REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap);
igorsk	0:b56b6a05cad4	1185	REJCICHAP(CI_AUTHTYPE, neg_chap, PPP_CHAP, go->chap_mdtype);
igorsk	0:b56b6a05cad4	1186	if (!go->neg_chap) {
igorsk	0:b56b6a05cad4	1187	REJCISHORT(CI_AUTHTYPE, neg_upap, PPP_PAP);
igorsk	0:b56b6a05cad4	1188	}
igorsk	0:b56b6a05cad4	1189	REJCILQR(CI_QUALITY, neg_lqr, go->lqr_period);
igorsk	0:b56b6a05cad4	1190	REJCICBCP(CI_CALLBACK, neg_cbcp, CBCP_OPT);
igorsk	0:b56b6a05cad4	1191	REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber);
igorsk	0:b56b6a05cad4	1192	REJCIVOID(CI_PCOMPRESSION, neg_pcompression);
igorsk	0:b56b6a05cad4	1193	REJCIVOID(CI_ACCOMPRESSION, neg_accompression);
igorsk	0:b56b6a05cad4	1194
igorsk	0:b56b6a05cad4	1195	/*
igorsk	0:b56b6a05cad4	1196	* If there are any remaining CIs, then this packet is bad.
igorsk	0:b56b6a05cad4	1197	*/
igorsk	0:b56b6a05cad4	1198	if (len != 0) {
igorsk	0:b56b6a05cad4	1199	goto bad;
igorsk	0:b56b6a05cad4	1200	}
igorsk	0:b56b6a05cad4	1201	/*
igorsk	0:b56b6a05cad4	1202	* Now we can update state.
igorsk	0:b56b6a05cad4	1203	*/
igorsk	0:b56b6a05cad4	1204	if (f->state != LS_OPENED) {
igorsk	0:b56b6a05cad4	1205	*go = try;
igorsk	0:b56b6a05cad4	1206	}
igorsk	0:b56b6a05cad4	1207	return 1;
igorsk	0:b56b6a05cad4	1208
igorsk	0:b56b6a05cad4	1209	bad:
igorsk	0:b56b6a05cad4	1210	LCPDEBUG(LOG_WARNING, ("lcp_rejci: received bad Reject!\n"));
igorsk	0:b56b6a05cad4	1211	return 0;
igorsk	0:b56b6a05cad4	1212	}
igorsk	0:b56b6a05cad4	1213
igorsk	0:b56b6a05cad4	1214
igorsk	0:b56b6a05cad4	1215	/*
igorsk	0:b56b6a05cad4	1216	* lcp_reqci - Check the peer's requested CIs and send appropriate response.
igorsk	0:b56b6a05cad4	1217	*
igorsk	0:b56b6a05cad4	1218	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
igorsk	0:b56b6a05cad4	1219	* appropriately. If reject_if_disagree is non-zero, doesn't return
igorsk	0:b56b6a05cad4	1220	* CONFNAK; returns CONFREJ if it can't return CONFACK.
igorsk	0:b56b6a05cad4	1221	*/
igorsk	0:b56b6a05cad4	1222	static int
igorsk	0:b56b6a05cad4	1223	lcp_reqci(fsm *f,
igorsk	0:b56b6a05cad4	1224	u_char inp, / Requested CIs */
igorsk	0:b56b6a05cad4	1225	int lenp, / Length of requested CIs */
igorsk	0:b56b6a05cad4	1226	int reject_if_disagree)
igorsk	0:b56b6a05cad4	1227	{
igorsk	0:b56b6a05cad4	1228	lcp_options *go = &lcp_gotoptions[f->unit];
igorsk	0:b56b6a05cad4	1229	lcp_options *ho = &lcp_hisoptions[f->unit];
igorsk	0:b56b6a05cad4	1230	lcp_options *ao = &lcp_allowoptions[f->unit];
igorsk	0:b56b6a05cad4	1231	u_char cip, next; /* Pointer to current and next CIs */
igorsk	0:b56b6a05cad4	1232	int cilen, citype; /* Parsed len, type */
igorsk	0:b56b6a05cad4	1233	u_char cichar; /* Parsed char value */
igorsk	0:b56b6a05cad4	1234	u_short cishort; /* Parsed short value */
igorsk	0:b56b6a05cad4	1235	u32_t cilong; /* Parse long value */
igorsk	0:b56b6a05cad4	1236	int rc = CONFACK; /* Final packet return code */
igorsk	0:b56b6a05cad4	1237	int orc; /* Individual option return code */
igorsk	0:b56b6a05cad4	1238	u_char p; / Pointer to next char to parse */
igorsk	0:b56b6a05cad4	1239	u_char rejp; / Pointer to next char in reject frame */
igorsk	0:b56b6a05cad4	1240	u_char nakp; / Pointer to next char in Nak frame */
igorsk	0:b56b6a05cad4	1241	int l = lenp; / Length left */
igorsk	0:b56b6a05cad4	1242	#if TRACELCP > 0
igorsk	0:b56b6a05cad4	1243	char traceBuf[80];
igorsk	0:b56b6a05cad4	1244	size_t traceNdx = 0;
igorsk	0:b56b6a05cad4	1245	#endif
igorsk	0:b56b6a05cad4	1246
igorsk	0:b56b6a05cad4	1247	/*
igorsk	0:b56b6a05cad4	1248	* Reset all his options.
igorsk	0:b56b6a05cad4	1249	*/
igorsk	0:b56b6a05cad4	1250	BZERO(ho, sizeof(*ho));
igorsk	0:b56b6a05cad4	1251
igorsk	0:b56b6a05cad4	1252	/*
igorsk	0:b56b6a05cad4	1253	* Process all his options.
igorsk	0:b56b6a05cad4	1254	*/
igorsk	0:b56b6a05cad4	1255	next = inp;
igorsk	0:b56b6a05cad4	1256	nakp = nak_buffer;
igorsk	0:b56b6a05cad4	1257	rejp = inp;
igorsk	0:b56b6a05cad4	1258	while (l) {
igorsk	0:b56b6a05cad4	1259	orc = CONFACK; /* Assume success */
igorsk	0:b56b6a05cad4	1260	cip = p = next; /* Remember begining of CI */
igorsk	0:b56b6a05cad4	1261	if (l < 2 \|\| /* Not enough data for CI header or */
igorsk	0:b56b6a05cad4	1262	p[1] < 2 \|\| /* CI length too small or */
igorsk	0:b56b6a05cad4	1263	p[1] > l) { /* CI length too big? */
igorsk	0:b56b6a05cad4	1264	LCPDEBUG(LOG_WARNING, ("lcp_reqci: bad CI length!\n"));
igorsk	0:b56b6a05cad4	1265	orc = CONFREJ; /* Reject bad CI */
igorsk	0:b56b6a05cad4	1266	cilen = l; /* Reject till end of packet */
igorsk	0:b56b6a05cad4	1267	l = 0; /* Don't loop again */
igorsk	0:b56b6a05cad4	1268	citype = 0;
igorsk	0:b56b6a05cad4	1269	goto endswitch;
igorsk	0:b56b6a05cad4	1270	}
igorsk	0:b56b6a05cad4	1271	GETCHAR(citype, p); /* Parse CI type */
igorsk	0:b56b6a05cad4	1272	GETCHAR(cilen, p); /* Parse CI length */
igorsk	0:b56b6a05cad4	1273	l -= cilen; /* Adjust remaining length */
igorsk	0:b56b6a05cad4	1274	next += cilen; /* Step to next CI */
igorsk	0:b56b6a05cad4	1275
igorsk	0:b56b6a05cad4	1276	switch (citype) { /* Check CI type */
igorsk	0:b56b6a05cad4	1277	case CI_MRU:
igorsk	0:b56b6a05cad4	1278	if (!ao->neg_mru) { /* Allow option? */
igorsk	0:b56b6a05cad4	1279	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - not allowed\n"));
igorsk	0:b56b6a05cad4	1280	orc = CONFREJ; /* Reject CI */
igorsk	0:b56b6a05cad4	1281	break;
igorsk	0:b56b6a05cad4	1282	} else if (cilen != CILEN_SHORT) { /* Check CI length */
igorsk	0:b56b6a05cad4	1283	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - bad length\n"));
igorsk	0:b56b6a05cad4	1284	orc = CONFREJ; /* Reject CI */
igorsk	0:b56b6a05cad4	1285	break;
igorsk	0:b56b6a05cad4	1286	}
igorsk	0:b56b6a05cad4	1287	GETSHORT(cishort, p); /* Parse MRU */
igorsk	0:b56b6a05cad4	1288
igorsk	0:b56b6a05cad4	1289	/*
igorsk	0:b56b6a05cad4	1290	* He must be able to receive at least our minimum.
igorsk	0:b56b6a05cad4	1291	* No need to check a maximum. If he sends a large number,
igorsk	0:b56b6a05cad4	1292	* we'll just ignore it.
igorsk	0:b56b6a05cad4	1293	*/
igorsk	0:b56b6a05cad4	1294	if (cishort < PPP_MINMRU) {
igorsk	0:b56b6a05cad4	1295	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak - MRU too small\n"));
igorsk	0:b56b6a05cad4	1296	orc = CONFNAK; /* Nak CI */
igorsk	0:b56b6a05cad4	1297	PUTCHAR(CI_MRU, nakp);
igorsk	0:b56b6a05cad4	1298	PUTCHAR(CILEN_SHORT, nakp);
igorsk	0:b56b6a05cad4	1299	PUTSHORT(PPP_MINMRU, nakp); /* Give him a hint */
igorsk	0:b56b6a05cad4	1300	break;
igorsk	0:b56b6a05cad4	1301	}
igorsk	0:b56b6a05cad4	1302	ho->neg_mru = 1; /* Remember he sent MRU */
igorsk	0:b56b6a05cad4	1303	ho->mru = cishort; /* And remember value */
igorsk	0:b56b6a05cad4	1304	#if TRACELCP > 0
igorsk	0:b56b6a05cad4	1305	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MRU %d", cishort);
igorsk	0:b56b6a05cad4	1306	traceNdx = strlen(traceBuf);
igorsk	0:b56b6a05cad4	1307	#endif
igorsk	0:b56b6a05cad4	1308	break;
igorsk	0:b56b6a05cad4	1309
igorsk	0:b56b6a05cad4	1310	case CI_ASYNCMAP:
igorsk	0:b56b6a05cad4	1311	if (!ao->neg_asyncmap) {
igorsk	0:b56b6a05cad4	1312	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP not allowed\n"));
igorsk	0:b56b6a05cad4	1313	orc = CONFREJ;
igorsk	0:b56b6a05cad4	1314	break;
igorsk	0:b56b6a05cad4	1315	} else if (cilen != CILEN_LONG) {
igorsk	0:b56b6a05cad4	1316	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP bad length\n"));
igorsk	0:b56b6a05cad4	1317	orc = CONFREJ;
igorsk	0:b56b6a05cad4	1318	break;
igorsk	0:b56b6a05cad4	1319	}
igorsk	0:b56b6a05cad4	1320	GETLONG(cilong, p);
igorsk	0:b56b6a05cad4	1321
igorsk	0:b56b6a05cad4	1322	/*
igorsk	0:b56b6a05cad4	1323	* Asyncmap must have set at least the bits
igorsk	0:b56b6a05cad4	1324	* which are set in lcp_allowoptions[unit].asyncmap.
igorsk	0:b56b6a05cad4	1325	*/
igorsk	0:b56b6a05cad4	1326	if ((ao->asyncmap & ~cilong) != 0) {
igorsk	0:b56b6a05cad4	1327	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak ASYNCMAP %lX missing %lX\n",
igorsk	0:b56b6a05cad4	1328	cilong, ao->asyncmap));
igorsk	0:b56b6a05cad4	1329	orc = CONFNAK;
igorsk	0:b56b6a05cad4	1330	PUTCHAR(CI_ASYNCMAP, nakp);
igorsk	0:b56b6a05cad4	1331	PUTCHAR(CILEN_LONG, nakp);
igorsk	0:b56b6a05cad4	1332	PUTLONG(ao->asyncmap \| cilong, nakp);
igorsk	0:b56b6a05cad4	1333	break;
igorsk	0:b56b6a05cad4	1334	}
igorsk	0:b56b6a05cad4	1335	ho->neg_asyncmap = 1;
igorsk	0:b56b6a05cad4	1336	ho->asyncmap = cilong;
igorsk	0:b56b6a05cad4	1337	#if TRACELCP > 0
igorsk	0:b56b6a05cad4	1338	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ASYNCMAP=%lX", cilong);
igorsk	0:b56b6a05cad4	1339	traceNdx = strlen(traceBuf);
igorsk	0:b56b6a05cad4	1340	#endif
igorsk	0:b56b6a05cad4	1341	break;
igorsk	0:b56b6a05cad4	1342
igorsk	0:b56b6a05cad4	1343	case CI_AUTHTYPE:
igorsk	0:b56b6a05cad4	1344	if (cilen < CILEN_SHORT) {
igorsk	0:b56b6a05cad4	1345	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE missing arg\n"));
igorsk	0:b56b6a05cad4	1346	orc = CONFREJ;
igorsk	0:b56b6a05cad4	1347	break;
igorsk	0:b56b6a05cad4	1348	} else if (!(ao->neg_upap \|\| ao->neg_chap)) {
igorsk	0:b56b6a05cad4	1349	/*
igorsk	0:b56b6a05cad4	1350	* Reject the option if we're not willing to authenticate.
igorsk	0:b56b6a05cad4	1351	*/
igorsk	0:b56b6a05cad4	1352	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE not allowed\n"));
igorsk	0:b56b6a05cad4	1353	orc = CONFREJ;
igorsk	0:b56b6a05cad4	1354	break;
igorsk	0:b56b6a05cad4	1355	}
igorsk	0:b56b6a05cad4	1356	GETSHORT(cishort, p);
igorsk	0:b56b6a05cad4	1357
igorsk	0:b56b6a05cad4	1358	/*
igorsk	0:b56b6a05cad4	1359	* Authtype must be UPAP or CHAP.
igorsk	0:b56b6a05cad4	1360	*
igorsk	0:b56b6a05cad4	1361	* Note: if both ao->neg_upap and ao->neg_chap are set,
igorsk	0:b56b6a05cad4	1362	* and the peer sends a Configure-Request with two
igorsk	0:b56b6a05cad4	1363	* authenticate-protocol requests, one for CHAP and one
igorsk	0:b56b6a05cad4	1364	* for UPAP, then we will reject the second request.
igorsk	0:b56b6a05cad4	1365	* Whether we end up doing CHAP or UPAP depends then on
igorsk	0:b56b6a05cad4	1366	* the ordering of the CIs in the peer's Configure-Request.
igorsk	0:b56b6a05cad4	1367	*/
igorsk	0:b56b6a05cad4	1368
igorsk	0:b56b6a05cad4	1369	if (cishort == PPP_PAP) {
igorsk	0:b56b6a05cad4	1370	if (ho->neg_chap) { /* we've already accepted CHAP */
igorsk	0:b56b6a05cad4	1371	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP already accepted\n"));
igorsk	0:b56b6a05cad4	1372	orc = CONFREJ;
igorsk	0:b56b6a05cad4	1373	break;
igorsk	0:b56b6a05cad4	1374	} else if (cilen != CILEN_SHORT) {
igorsk	0:b56b6a05cad4	1375	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP bad len\n"));
igorsk	0:b56b6a05cad4	1376	orc = CONFREJ;
igorsk	0:b56b6a05cad4	1377	break;
igorsk	0:b56b6a05cad4	1378	}
igorsk	0:b56b6a05cad4	1379	if (!ao->neg_upap) { /* we don't want to do PAP */
igorsk	0:b56b6a05cad4	1380	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE PAP not allowed\n"));
igorsk	0:b56b6a05cad4	1381	orc = CONFNAK; /* NAK it and suggest CHAP */
igorsk	0:b56b6a05cad4	1382	PUTCHAR(CI_AUTHTYPE, nakp);
igorsk	0:b56b6a05cad4	1383	PUTCHAR(CILEN_CHAP, nakp);
igorsk	0:b56b6a05cad4	1384	PUTSHORT(PPP_CHAP, nakp);
igorsk	0:b56b6a05cad4	1385	PUTCHAR(ao->chap_mdtype, nakp);
igorsk	0:b56b6a05cad4	1386	break;
igorsk	0:b56b6a05cad4	1387	}
igorsk	0:b56b6a05cad4	1388	ho->neg_upap = 1;
igorsk	0:b56b6a05cad4	1389	#if TRACELCP > 0
igorsk	0:b56b6a05cad4	1390	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PAP (%X)", cishort);
igorsk	0:b56b6a05cad4	1391	traceNdx = strlen(traceBuf);
igorsk	0:b56b6a05cad4	1392	#endif
igorsk	0:b56b6a05cad4	1393	break;
igorsk	0:b56b6a05cad4	1394	}
igorsk	0:b56b6a05cad4	1395	if (cishort == PPP_CHAP) {
igorsk	0:b56b6a05cad4	1396	if (ho->neg_upap) { /* we've already accepted PAP */
igorsk	0:b56b6a05cad4	1397	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP accepted PAP\n"));
igorsk	0:b56b6a05cad4	1398	orc = CONFREJ;
igorsk	0:b56b6a05cad4	1399	break;
igorsk	0:b56b6a05cad4	1400	} else if (cilen != CILEN_CHAP) {
igorsk	0:b56b6a05cad4	1401	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP bad len\n"));
igorsk	0:b56b6a05cad4	1402	orc = CONFREJ;
igorsk	0:b56b6a05cad4	1403	break;
igorsk	0:b56b6a05cad4	1404	}
igorsk	0:b56b6a05cad4	1405	if (!ao->neg_chap) { /* we don't want to do CHAP */
igorsk	0:b56b6a05cad4	1406	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP not allowed\n"));
igorsk	0:b56b6a05cad4	1407	orc = CONFNAK; /* NAK it and suggest PAP */
igorsk	0:b56b6a05cad4	1408	PUTCHAR(CI_AUTHTYPE, nakp);
igorsk	0:b56b6a05cad4	1409	PUTCHAR(CILEN_SHORT, nakp);
igorsk	0:b56b6a05cad4	1410	PUTSHORT(PPP_PAP, nakp);
igorsk	0:b56b6a05cad4	1411	break;
igorsk	0:b56b6a05cad4	1412	}
igorsk	0:b56b6a05cad4	1413	GETCHAR(cichar, p); /* get digest type*/
igorsk	0:b56b6a05cad4	1414	if (cichar != CHAP_DIGEST_MD5
igorsk	0:b56b6a05cad4	1415	#if MSCHAP_SUPPORT
igorsk	0:b56b6a05cad4	1416	&& cichar != CHAP_MICROSOFT
igorsk	0:b56b6a05cad4	1417	#endif
igorsk	0:b56b6a05cad4	1418	) {
igorsk	0:b56b6a05cad4	1419	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP digest=%d\n", (int)cichar));
igorsk	0:b56b6a05cad4	1420	orc = CONFNAK;
igorsk	0:b56b6a05cad4	1421	PUTCHAR(CI_AUTHTYPE, nakp);
igorsk	0:b56b6a05cad4	1422	PUTCHAR(CILEN_CHAP, nakp);
igorsk	0:b56b6a05cad4	1423	PUTSHORT(PPP_CHAP, nakp);
igorsk	0:b56b6a05cad4	1424	PUTCHAR(ao->chap_mdtype, nakp);
igorsk	0:b56b6a05cad4	1425	break;
igorsk	0:b56b6a05cad4	1426	}
igorsk	0:b56b6a05cad4	1427	#if TRACELCP > 0
igorsk	0:b56b6a05cad4	1428	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CHAP %X,%d", cishort, (int)cichar);
igorsk	0:b56b6a05cad4	1429	traceNdx = strlen(traceBuf);
igorsk	0:b56b6a05cad4	1430	#endif
igorsk	0:b56b6a05cad4	1431	ho->chap_mdtype = cichar; /* save md type */
igorsk	0:b56b6a05cad4	1432	ho->neg_chap = 1;
igorsk	0:b56b6a05cad4	1433	break;
igorsk	0:b56b6a05cad4	1434	}
igorsk	0:b56b6a05cad4	1435
igorsk	0:b56b6a05cad4	1436	/*
igorsk	0:b56b6a05cad4	1437	* We don't recognize the protocol they're asking for.
igorsk	0:b56b6a05cad4	1438	* Nak it with something we're willing to do.
igorsk	0:b56b6a05cad4	1439	* (At this point we know ao->neg_upap \|\| ao->neg_chap.)
igorsk	0:b56b6a05cad4	1440	*/
igorsk	0:b56b6a05cad4	1441	orc = CONFNAK;
igorsk	0:b56b6a05cad4	1442	PUTCHAR(CI_AUTHTYPE, nakp);
igorsk	0:b56b6a05cad4	1443	if (ao->neg_chap) {
igorsk	0:b56b6a05cad4	1444	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req CHAP\n", cishort));
igorsk	0:b56b6a05cad4	1445	PUTCHAR(CILEN_CHAP, nakp);
igorsk	0:b56b6a05cad4	1446	PUTSHORT(PPP_CHAP, nakp);
igorsk	0:b56b6a05cad4	1447	PUTCHAR(ao->chap_mdtype, nakp);
igorsk	0:b56b6a05cad4	1448	} else {
igorsk	0:b56b6a05cad4	1449	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req PAP\n", cishort));
igorsk	0:b56b6a05cad4	1450	PUTCHAR(CILEN_SHORT, nakp);
igorsk	0:b56b6a05cad4	1451	PUTSHORT(PPP_PAP, nakp);
igorsk	0:b56b6a05cad4	1452	}
igorsk	0:b56b6a05cad4	1453	break;
igorsk	0:b56b6a05cad4	1454
igorsk	0:b56b6a05cad4	1455	case CI_QUALITY:
igorsk	0:b56b6a05cad4	1456	GETSHORT(cishort, p);
igorsk	0:b56b6a05cad4	1457	GETLONG(cilong, p);
igorsk	0:b56b6a05cad4	1458	#if TRACELCP > 0
igorsk	0:b56b6a05cad4	1459	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " QUALITY (%x %x)", cishort, (unsigned int) cilong);
igorsk	0:b56b6a05cad4	1460	traceNdx = strlen(traceBuf);
igorsk	0:b56b6a05cad4	1461	#endif
igorsk	0:b56b6a05cad4	1462
igorsk	0:b56b6a05cad4	1463	if (!ao->neg_lqr \|\|
igorsk	0:b56b6a05cad4	1464	cilen != CILEN_LQR) {
igorsk	0:b56b6a05cad4	1465	orc = CONFREJ;
igorsk	0:b56b6a05cad4	1466	break;
igorsk	0:b56b6a05cad4	1467	}
igorsk	0:b56b6a05cad4	1468
igorsk	0:b56b6a05cad4	1469	/*
igorsk	0:b56b6a05cad4	1470	* Check the protocol and the reporting period.
igorsk	0:b56b6a05cad4	1471	* XXX When should we Nak this, and what with?
igorsk	0:b56b6a05cad4	1472	*/
igorsk	0:b56b6a05cad4	1473	if (cishort != PPP_LQR) {
igorsk	0:b56b6a05cad4	1474	orc = CONFNAK;
igorsk	0:b56b6a05cad4	1475	PUTCHAR(CI_QUALITY, nakp);
igorsk	0:b56b6a05cad4	1476	PUTCHAR(CILEN_LQR, nakp);
igorsk	0:b56b6a05cad4	1477	PUTSHORT(PPP_LQR, nakp);
igorsk	0:b56b6a05cad4	1478	PUTLONG(ao->lqr_period, nakp);
igorsk	0:b56b6a05cad4	1479	break;
igorsk	0:b56b6a05cad4	1480	}
igorsk	0:b56b6a05cad4	1481	break;
igorsk	0:b56b6a05cad4	1482
igorsk	0:b56b6a05cad4	1483	case CI_MAGICNUMBER:
igorsk	0:b56b6a05cad4	1484	if (!(ao->neg_magicnumber \|\| go->neg_magicnumber) \|\|
igorsk	0:b56b6a05cad4	1485	cilen != CILEN_LONG) {
igorsk	0:b56b6a05cad4	1486	orc = CONFREJ;
igorsk	0:b56b6a05cad4	1487	break;
igorsk	0:b56b6a05cad4	1488	}
igorsk	0:b56b6a05cad4	1489	GETLONG(cilong, p);
igorsk	0:b56b6a05cad4	1490	#if TRACELCP > 0
igorsk	0:b56b6a05cad4	1491	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MAGICNUMBER (%lX)", cilong);
igorsk	0:b56b6a05cad4	1492	traceNdx = strlen(traceBuf);
igorsk	0:b56b6a05cad4	1493	#endif
igorsk	0:b56b6a05cad4	1494
igorsk	0:b56b6a05cad4	1495	/*
igorsk	0:b56b6a05cad4	1496	* He must have a different magic number.
igorsk	0:b56b6a05cad4	1497	*/
igorsk	0:b56b6a05cad4	1498	if (go->neg_magicnumber &&
igorsk	0:b56b6a05cad4	1499	cilong == go->magicnumber) {
igorsk	0:b56b6a05cad4	1500	cilong = magic(); /* Don't put magic() inside macro! */
igorsk	0:b56b6a05cad4	1501	orc = CONFNAK;
igorsk	0:b56b6a05cad4	1502	PUTCHAR(CI_MAGICNUMBER, nakp);
igorsk	0:b56b6a05cad4	1503	PUTCHAR(CILEN_LONG, nakp);
igorsk	0:b56b6a05cad4	1504	PUTLONG(cilong, nakp);
igorsk	0:b56b6a05cad4	1505	break;
igorsk	0:b56b6a05cad4	1506	}
igorsk	0:b56b6a05cad4	1507	ho->neg_magicnumber = 1;
igorsk	0:b56b6a05cad4	1508	ho->magicnumber = cilong;
igorsk	0:b56b6a05cad4	1509	break;
igorsk	0:b56b6a05cad4	1510
igorsk	0:b56b6a05cad4	1511
igorsk	0:b56b6a05cad4	1512	case CI_PCOMPRESSION:
igorsk	0:b56b6a05cad4	1513	#if TRACELCP > 0
igorsk	0:b56b6a05cad4	1514	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PCOMPRESSION");
igorsk	0:b56b6a05cad4	1515	traceNdx = strlen(traceBuf);
igorsk	0:b56b6a05cad4	1516	#endif
igorsk	0:b56b6a05cad4	1517	if (!ao->neg_pcompression \|\|
igorsk	0:b56b6a05cad4	1518	cilen != CILEN_VOID) {
igorsk	0:b56b6a05cad4	1519	orc = CONFREJ;
igorsk	0:b56b6a05cad4	1520	break;
igorsk	0:b56b6a05cad4	1521	}
igorsk	0:b56b6a05cad4	1522	ho->neg_pcompression = 1;
igorsk	0:b56b6a05cad4	1523	break;
igorsk	0:b56b6a05cad4	1524
igorsk	0:b56b6a05cad4	1525	case CI_ACCOMPRESSION:
igorsk	0:b56b6a05cad4	1526	#if TRACELCP > 0
igorsk	0:b56b6a05cad4	1527	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ACCOMPRESSION");
igorsk	0:b56b6a05cad4	1528	traceNdx = strlen(traceBuf);
igorsk	0:b56b6a05cad4	1529	#endif
igorsk	0:b56b6a05cad4	1530	if (!ao->neg_accompression \|\|
igorsk	0:b56b6a05cad4	1531	cilen != CILEN_VOID) {
igorsk	0:b56b6a05cad4	1532	orc = CONFREJ;
igorsk	0:b56b6a05cad4	1533	break;
igorsk	0:b56b6a05cad4	1534	}
igorsk	0:b56b6a05cad4	1535	ho->neg_accompression = 1;
igorsk	0:b56b6a05cad4	1536	break;
igorsk	0:b56b6a05cad4	1537
igorsk	0:b56b6a05cad4	1538	case CI_MRRU:
igorsk	0:b56b6a05cad4	1539	#if TRACELCP > 0
igorsk	0:b56b6a05cad4	1540	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_MRRU");
igorsk	0:b56b6a05cad4	1541	traceNdx = strlen(traceBuf);
igorsk	0:b56b6a05cad4	1542	#endif
igorsk	0:b56b6a05cad4	1543	orc = CONFREJ;
igorsk	0:b56b6a05cad4	1544	break;
igorsk	0:b56b6a05cad4	1545
igorsk	0:b56b6a05cad4	1546	case CI_SSNHF:
igorsk	0:b56b6a05cad4	1547	#if TRACELCP > 0
igorsk	0:b56b6a05cad4	1548	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_SSNHF");
igorsk	0:b56b6a05cad4	1549	traceNdx = strlen(traceBuf);
igorsk	0:b56b6a05cad4	1550	#endif
igorsk	0:b56b6a05cad4	1551	orc = CONFREJ;
igorsk	0:b56b6a05cad4	1552	break;
igorsk	0:b56b6a05cad4	1553
igorsk	0:b56b6a05cad4	1554	case CI_EPDISC:
igorsk	0:b56b6a05cad4	1555	#if TRACELCP > 0
igorsk	0:b56b6a05cad4	1556	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_EPDISC");
igorsk	0:b56b6a05cad4	1557	traceNdx = strlen(traceBuf);
igorsk	0:b56b6a05cad4	1558	#endif
igorsk	0:b56b6a05cad4	1559	orc = CONFREJ;
igorsk	0:b56b6a05cad4	1560	break;
igorsk	0:b56b6a05cad4	1561
igorsk	0:b56b6a05cad4	1562	default:
igorsk	0:b56b6a05cad4	1563	#if TRACELCP
igorsk	0:b56b6a05cad4	1564	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " unknown %d", citype);
igorsk	0:b56b6a05cad4	1565	traceNdx = strlen(traceBuf);
igorsk	0:b56b6a05cad4	1566	#endif
igorsk	0:b56b6a05cad4	1567	orc = CONFREJ;
igorsk	0:b56b6a05cad4	1568	break;
igorsk	0:b56b6a05cad4	1569	}
igorsk	0:b56b6a05cad4	1570
igorsk	0:b56b6a05cad4	1571	endswitch:
igorsk	0:b56b6a05cad4	1572	#if TRACELCP
igorsk	0:b56b6a05cad4	1573	if (traceNdx >= 80 - 32) {
igorsk	0:b56b6a05cad4	1574	LCPDEBUG(LOG_INFO, ("lcp_reqci: rcvd%s\n", traceBuf));
igorsk	0:b56b6a05cad4	1575	traceNdx = 0;
igorsk	0:b56b6a05cad4	1576	}
igorsk	0:b56b6a05cad4	1577	#endif
igorsk	0:b56b6a05cad4	1578	if (orc == CONFACK && /* Good CI */
igorsk	0:b56b6a05cad4	1579	rc != CONFACK) { /* but prior CI wasnt? */
igorsk	0:b56b6a05cad4	1580	continue; /* Don't send this one */
igorsk	0:b56b6a05cad4	1581	}
igorsk	0:b56b6a05cad4	1582
igorsk	0:b56b6a05cad4	1583	if (orc == CONFNAK) { /* Nak this CI? */
igorsk	0:b56b6a05cad4	1584	if (reject_if_disagree /* Getting fed up with sending NAKs? */
igorsk	0:b56b6a05cad4	1585	&& citype != CI_MAGICNUMBER) {
igorsk	0:b56b6a05cad4	1586	orc = CONFREJ; /* Get tough if so */
igorsk	0:b56b6a05cad4	1587	} else {
igorsk	0:b56b6a05cad4	1588	if (rc == CONFREJ) { /* Rejecting prior CI? */
igorsk	0:b56b6a05cad4	1589	continue; /* Don't send this one */
igorsk	0:b56b6a05cad4	1590	}
igorsk	0:b56b6a05cad4	1591	rc = CONFNAK;
igorsk	0:b56b6a05cad4	1592	}
igorsk	0:b56b6a05cad4	1593	}
igorsk	0:b56b6a05cad4	1594	if (orc == CONFREJ) { /* Reject this CI */
igorsk	0:b56b6a05cad4	1595	rc = CONFREJ;
igorsk	0:b56b6a05cad4	1596	if (cip != rejp) { /* Need to move rejected CI? */
igorsk	0:b56b6a05cad4	1597	BCOPY(cip, rejp, cilen); /* Move it */
igorsk	0:b56b6a05cad4	1598	}
igorsk	0:b56b6a05cad4	1599	INCPTR(cilen, rejp); /* Update output pointer */
igorsk	0:b56b6a05cad4	1600	}
igorsk	0:b56b6a05cad4	1601	}
igorsk	0:b56b6a05cad4	1602
igorsk	0:b56b6a05cad4	1603	/*
igorsk	0:b56b6a05cad4	1604	* If we wanted to send additional NAKs (for unsent CIs), the
igorsk	0:b56b6a05cad4	1605	* code would go here. The extra NAKs would go at *nakp.
igorsk	0:b56b6a05cad4	1606	* At present there are no cases where we want to ask the
igorsk	0:b56b6a05cad4	1607	* peer to negotiate an option.
igorsk	0:b56b6a05cad4	1608	*/
igorsk	0:b56b6a05cad4	1609
igorsk	0:b56b6a05cad4	1610	switch (rc) {
igorsk	0:b56b6a05cad4	1611	case CONFACK:
igorsk	0:b56b6a05cad4	1612	*lenp = (int)(next - inp);
igorsk	0:b56b6a05cad4	1613	break;
igorsk	0:b56b6a05cad4	1614	case CONFNAK:
igorsk	0:b56b6a05cad4	1615	/*
igorsk	0:b56b6a05cad4	1616	* Copy the Nak'd options from the nak_buffer to the caller's buffer.
igorsk	0:b56b6a05cad4	1617	*/
igorsk	0:b56b6a05cad4	1618	*lenp = (int)(nakp - nak_buffer);
igorsk	0:b56b6a05cad4	1619	BCOPY(nak_buffer, inp, *lenp);
igorsk	0:b56b6a05cad4	1620	break;
igorsk	0:b56b6a05cad4	1621	case CONFREJ:
igorsk	0:b56b6a05cad4	1622	*lenp = (int)(rejp - inp);
igorsk	0:b56b6a05cad4	1623	break;
igorsk	0:b56b6a05cad4	1624	}
igorsk	0:b56b6a05cad4	1625
igorsk	0:b56b6a05cad4	1626	#if TRACELCP > 0
igorsk	0:b56b6a05cad4	1627	if (traceNdx > 0) {
igorsk	0:b56b6a05cad4	1628	LCPDEBUG(LOG_INFO, ("lcp_reqci: %s\n", traceBuf));
igorsk	0:b56b6a05cad4	1629	}
igorsk	0:b56b6a05cad4	1630	#endif
igorsk	0:b56b6a05cad4	1631	LCPDEBUG(LOG_INFO, ("lcp_reqci: returning CONF%s.\n", CODENAME(rc)));
igorsk	0:b56b6a05cad4	1632	return (rc); /* Return final code */
igorsk	0:b56b6a05cad4	1633	}
igorsk	0:b56b6a05cad4	1634
igorsk	0:b56b6a05cad4	1635
igorsk	0:b56b6a05cad4	1636	/*
igorsk	0:b56b6a05cad4	1637	* lcp_up - LCP has come UP.
igorsk	0:b56b6a05cad4	1638	*/
igorsk	0:b56b6a05cad4	1639	static void
igorsk	0:b56b6a05cad4	1640	lcp_up(fsm *f)
igorsk	0:b56b6a05cad4	1641	{
igorsk	0:b56b6a05cad4	1642	lcp_options *wo = &lcp_wantoptions[f->unit];
igorsk	0:b56b6a05cad4	1643	lcp_options *ho = &lcp_hisoptions[f->unit];
igorsk	0:b56b6a05cad4	1644	lcp_options *go = &lcp_gotoptions[f->unit];
igorsk	0:b56b6a05cad4	1645	lcp_options *ao = &lcp_allowoptions[f->unit];
igorsk	0:b56b6a05cad4	1646
igorsk	0:b56b6a05cad4	1647	if (!go->neg_magicnumber) {
igorsk	0:b56b6a05cad4	1648	go->magicnumber = 0;
igorsk	0:b56b6a05cad4	1649	}
igorsk	0:b56b6a05cad4	1650	if (!ho->neg_magicnumber) {
igorsk	0:b56b6a05cad4	1651	ho->magicnumber = 0;
igorsk	0:b56b6a05cad4	1652	}
igorsk	0:b56b6a05cad4	1653
igorsk	0:b56b6a05cad4	1654	/*
igorsk	0:b56b6a05cad4	1655	* Set our MTU to the smaller of the MTU we wanted and
igorsk	0:b56b6a05cad4	1656	* the MRU our peer wanted. If we negotiated an MRU,
igorsk	0:b56b6a05cad4	1657	* set our MRU to the larger of value we wanted and
igorsk	0:b56b6a05cad4	1658	* the value we got in the negotiation.
igorsk	0:b56b6a05cad4	1659	*/
igorsk	0:b56b6a05cad4	1660	ppp_send_config(f->unit, LWIP_MIN(ao->mru, (ho->neg_mru? ho->mru: PPP_MRU)),
igorsk	0:b56b6a05cad4	1661	(ho->neg_asyncmap? ho->asyncmap: 0xffffffffl),
igorsk	0:b56b6a05cad4	1662	ho->neg_pcompression, ho->neg_accompression);
igorsk	0:b56b6a05cad4	1663	/*
igorsk	0:b56b6a05cad4	1664	* If the asyncmap hasn't been negotiated, we really should
igorsk	0:b56b6a05cad4	1665	* set the receive asyncmap to ffffffff, but we set it to 0
igorsk	0:b56b6a05cad4	1666	* for backwards contemptibility.
igorsk	0:b56b6a05cad4	1667	*/
igorsk	0:b56b6a05cad4	1668	ppp_recv_config(f->unit, (go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU),
igorsk	0:b56b6a05cad4	1669	(go->neg_asyncmap? go->asyncmap: 0x00000000),
igorsk	0:b56b6a05cad4	1670	go->neg_pcompression, go->neg_accompression);
igorsk	0:b56b6a05cad4	1671
igorsk	0:b56b6a05cad4	1672	if (ho->neg_mru) {
igorsk	0:b56b6a05cad4	1673	peer_mru[f->unit] = ho->mru;
igorsk	0:b56b6a05cad4	1674	}
igorsk	0:b56b6a05cad4	1675
igorsk	0:b56b6a05cad4	1676	lcp_echo_lowerup(f->unit); /* Enable echo messages */
igorsk	0:b56b6a05cad4	1677
igorsk	0:b56b6a05cad4	1678	link_established(f->unit); /* The link is up; authenticate now */
igorsk	0:b56b6a05cad4	1679	}
igorsk	0:b56b6a05cad4	1680
igorsk	0:b56b6a05cad4	1681
igorsk	0:b56b6a05cad4	1682	/*
igorsk	0:b56b6a05cad4	1683	* lcp_down - LCP has gone DOWN.
igorsk	0:b56b6a05cad4	1684	*
igorsk	0:b56b6a05cad4	1685	* Alert other protocols.
igorsk	0:b56b6a05cad4	1686	*/
igorsk	0:b56b6a05cad4	1687	static void
igorsk	0:b56b6a05cad4	1688	lcp_down(fsm *f)
igorsk	0:b56b6a05cad4	1689	{
igorsk	0:b56b6a05cad4	1690	lcp_options *go = &lcp_gotoptions[f->unit];
igorsk	0:b56b6a05cad4	1691
igorsk	0:b56b6a05cad4	1692	lcp_echo_lowerdown(f->unit);
igorsk	0:b56b6a05cad4	1693
igorsk	0:b56b6a05cad4	1694	link_down(f->unit);
igorsk	0:b56b6a05cad4	1695
igorsk	0:b56b6a05cad4	1696	ppp_send_config(f->unit, PPP_MRU, 0xffffffffl, 0, 0);
igorsk	0:b56b6a05cad4	1697	ppp_recv_config(f->unit, PPP_MRU,
igorsk	0:b56b6a05cad4	1698	(go->neg_asyncmap? go->asyncmap: 0x00000000),
igorsk	0:b56b6a05cad4	1699	go->neg_pcompression, go->neg_accompression);
igorsk	0:b56b6a05cad4	1700	peer_mru[f->unit] = PPP_MRU;
igorsk	0:b56b6a05cad4	1701	}
igorsk	0:b56b6a05cad4	1702
igorsk	0:b56b6a05cad4	1703
igorsk	0:b56b6a05cad4	1704	/*
igorsk	0:b56b6a05cad4	1705	* lcp_starting - LCP needs the lower layer up.
igorsk	0:b56b6a05cad4	1706	*/
igorsk	0:b56b6a05cad4	1707	static void
igorsk	0:b56b6a05cad4	1708	lcp_starting(fsm *f)
igorsk	0:b56b6a05cad4	1709	{
igorsk	0:b56b6a05cad4	1710	link_required(f->unit); /* lwip: currently does nothing */
igorsk	0:b56b6a05cad4	1711	}
igorsk	0:b56b6a05cad4	1712
igorsk	0:b56b6a05cad4	1713
igorsk	0:b56b6a05cad4	1714	/*
igorsk	0:b56b6a05cad4	1715	* lcp_finished - LCP has finished with the lower layer.
igorsk	0:b56b6a05cad4	1716	*/
igorsk	0:b56b6a05cad4	1717	static void
igorsk	0:b56b6a05cad4	1718	lcp_finished(fsm *f)
igorsk	0:b56b6a05cad4	1719	{
igorsk	0:b56b6a05cad4	1720	link_terminated(f->unit); /* we are finished with the link */
igorsk	0:b56b6a05cad4	1721	}
igorsk	0:b56b6a05cad4	1722
igorsk	0:b56b6a05cad4	1723
igorsk	0:b56b6a05cad4	1724	#if PPP_ADDITIONAL_CALLBACKS
igorsk	0:b56b6a05cad4	1725	/*
igorsk	0:b56b6a05cad4	1726	* print_string - print a readable representation of a string using
igorsk	0:b56b6a05cad4	1727	* printer.
igorsk	0:b56b6a05cad4	1728	*/
igorsk	0:b56b6a05cad4	1729	static void
igorsk	0:b56b6a05cad4	1730	print_string( char p, int len, void (printer) (void , char , ...), void *arg)
igorsk	0:b56b6a05cad4	1731	{
igorsk	0:b56b6a05cad4	1732	int c;
igorsk	0:b56b6a05cad4	1733
igorsk	0:b56b6a05cad4	1734	printer(arg, "\"");
igorsk	0:b56b6a05cad4	1735	for (; len > 0; --len) {
igorsk	0:b56b6a05cad4	1736	c = *p++;
igorsk	0:b56b6a05cad4	1737	if (' ' <= c && c <= '~') {
igorsk	0:b56b6a05cad4	1738	if (c == '\\' \|\| c == '"') {
igorsk	0:b56b6a05cad4	1739	printer(arg, "\\");
igorsk	0:b56b6a05cad4	1740	}
igorsk	0:b56b6a05cad4	1741	printer(arg, "%c", c);
igorsk	0:b56b6a05cad4	1742	} else {
igorsk	0:b56b6a05cad4	1743	switch (c) {
igorsk	0:b56b6a05cad4	1744	case '\n':
igorsk	0:b56b6a05cad4	1745	printer(arg, "\\n");
igorsk	0:b56b6a05cad4	1746	break;
igorsk	0:b56b6a05cad4	1747	case '\r':
igorsk	0:b56b6a05cad4	1748	printer(arg, "\\r");
igorsk	0:b56b6a05cad4	1749	break;
igorsk	0:b56b6a05cad4	1750	case '\t':
igorsk	0:b56b6a05cad4	1751	printer(arg, "\\t");
igorsk	0:b56b6a05cad4	1752	break;
igorsk	0:b56b6a05cad4	1753	default:
igorsk	0:b56b6a05cad4	1754	printer(arg, "\\%.3o", c);
igorsk	0:b56b6a05cad4	1755	}
igorsk	0:b56b6a05cad4	1756	}
igorsk	0:b56b6a05cad4	1757	}
igorsk	0:b56b6a05cad4	1758	printer(arg, "\"");
igorsk	0:b56b6a05cad4	1759	}
igorsk	0:b56b6a05cad4	1760
igorsk	0:b56b6a05cad4	1761
igorsk	0:b56b6a05cad4	1762	/*
igorsk	0:b56b6a05cad4	1763	* lcp_printpkt - print the contents of an LCP packet.
igorsk	0:b56b6a05cad4	1764	*/
igorsk	0:b56b6a05cad4	1765	static char *lcp_codenames[] = {
igorsk	0:b56b6a05cad4	1766	"ConfReq", "ConfAck", "ConfNak", "ConfRej",
igorsk	0:b56b6a05cad4	1767	"TermReq", "TermAck", "CodeRej", "ProtRej",
igorsk	0:b56b6a05cad4	1768	"EchoReq", "EchoRep", "DiscReq"
igorsk	0:b56b6a05cad4	1769	};
igorsk	0:b56b6a05cad4	1770
igorsk	0:b56b6a05cad4	1771	static int
igorsk	0:b56b6a05cad4	1772	lcp_printpkt( u_char p, int plen, void (printer) (void , char , ...), void *arg)
igorsk	0:b56b6a05cad4	1773	{
igorsk	0:b56b6a05cad4	1774	int code, id, len, olen;
igorsk	0:b56b6a05cad4	1775	u_char pstart, optend;
igorsk	0:b56b6a05cad4	1776	u_short cishort;
igorsk	0:b56b6a05cad4	1777	u32_t cilong;
igorsk	0:b56b6a05cad4	1778
igorsk	0:b56b6a05cad4	1779	if (plen < HEADERLEN) {
igorsk	0:b56b6a05cad4	1780	return 0;
igorsk	0:b56b6a05cad4	1781	}
igorsk	0:b56b6a05cad4	1782	pstart = p;
igorsk	0:b56b6a05cad4	1783	GETCHAR(code, p);
igorsk	0:b56b6a05cad4	1784	GETCHAR(id, p);
igorsk	0:b56b6a05cad4	1785	GETSHORT(len, p);
igorsk	0:b56b6a05cad4	1786	if (len < HEADERLEN \|\| len > plen) {
igorsk	0:b56b6a05cad4	1787	return 0;
igorsk	0:b56b6a05cad4	1788	}
igorsk	0:b56b6a05cad4	1789
igorsk	0:b56b6a05cad4	1790	if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *)) {
igorsk	0:b56b6a05cad4	1791	printer(arg, " %s", lcp_codenames[code-1]);
igorsk	0:b56b6a05cad4	1792	} else {
igorsk	0:b56b6a05cad4	1793	printer(arg, " code=0x%x", code);
igorsk	0:b56b6a05cad4	1794	}
igorsk	0:b56b6a05cad4	1795	printer(arg, " id=0x%x", id);
igorsk	0:b56b6a05cad4	1796	len -= HEADERLEN;
igorsk	0:b56b6a05cad4	1797	switch (code) {
igorsk	0:b56b6a05cad4	1798	case CONFREQ:
igorsk	0:b56b6a05cad4	1799	case CONFACK:
igorsk	0:b56b6a05cad4	1800	case CONFNAK:
igorsk	0:b56b6a05cad4	1801	case CONFREJ:
igorsk	0:b56b6a05cad4	1802	/* print option list */
igorsk	0:b56b6a05cad4	1803	while (len >= 2) {
igorsk	0:b56b6a05cad4	1804	GETCHAR(code, p);
igorsk	0:b56b6a05cad4	1805	GETCHAR(olen, p);
igorsk	0:b56b6a05cad4	1806	p -= 2;
igorsk	0:b56b6a05cad4	1807	if (olen < 2 \|\| olen > len) {
igorsk	0:b56b6a05cad4	1808	break;
igorsk	0:b56b6a05cad4	1809	}
igorsk	0:b56b6a05cad4	1810	printer(arg, " <");
igorsk	0:b56b6a05cad4	1811	len -= olen;
igorsk	0:b56b6a05cad4	1812	optend = p + olen;
igorsk	0:b56b6a05cad4	1813	switch (code) {
igorsk	0:b56b6a05cad4	1814	case CI_MRU:
igorsk	0:b56b6a05cad4	1815	if (olen == CILEN_SHORT) {
igorsk	0:b56b6a05cad4	1816	p += 2;
igorsk	0:b56b6a05cad4	1817	GETSHORT(cishort, p);
igorsk	0:b56b6a05cad4	1818	printer(arg, "mru %d", cishort);
igorsk	0:b56b6a05cad4	1819	}
igorsk	0:b56b6a05cad4	1820	break;
igorsk	0:b56b6a05cad4	1821	case CI_ASYNCMAP:
igorsk	0:b56b6a05cad4	1822	if (olen == CILEN_LONG) {
igorsk	0:b56b6a05cad4	1823	p += 2;
igorsk	0:b56b6a05cad4	1824	GETLONG(cilong, p);
igorsk	0:b56b6a05cad4	1825	printer(arg, "asyncmap 0x%lx", cilong);
igorsk	0:b56b6a05cad4	1826	}
igorsk	0:b56b6a05cad4	1827	break;
igorsk	0:b56b6a05cad4	1828	case CI_AUTHTYPE:
igorsk	0:b56b6a05cad4	1829	if (olen >= CILEN_SHORT) {
igorsk	0:b56b6a05cad4	1830	p += 2;
igorsk	0:b56b6a05cad4	1831	printer(arg, "auth ");
igorsk	0:b56b6a05cad4	1832	GETSHORT(cishort, p);
igorsk	0:b56b6a05cad4	1833	switch (cishort) {
igorsk	0:b56b6a05cad4	1834	case PPP_PAP:
igorsk	0:b56b6a05cad4	1835	printer(arg, "pap");
igorsk	0:b56b6a05cad4	1836	break;
igorsk	0:b56b6a05cad4	1837	case PPP_CHAP:
igorsk	0:b56b6a05cad4	1838	printer(arg, "chap");
igorsk	0:b56b6a05cad4	1839	break;
igorsk	0:b56b6a05cad4	1840	default:
igorsk	0:b56b6a05cad4	1841	printer(arg, "0x%x", cishort);
igorsk	0:b56b6a05cad4	1842	}
igorsk	0:b56b6a05cad4	1843	}
igorsk	0:b56b6a05cad4	1844	break;
igorsk	0:b56b6a05cad4	1845	case CI_QUALITY:
igorsk	0:b56b6a05cad4	1846	if (olen >= CILEN_SHORT) {
igorsk	0:b56b6a05cad4	1847	p += 2;
igorsk	0:b56b6a05cad4	1848	printer(arg, "quality ");
igorsk	0:b56b6a05cad4	1849	GETSHORT(cishort, p);
igorsk	0:b56b6a05cad4	1850	switch (cishort) {
igorsk	0:b56b6a05cad4	1851	case PPP_LQR:
igorsk	0:b56b6a05cad4	1852	printer(arg, "lqr");
igorsk	0:b56b6a05cad4	1853	break;
igorsk	0:b56b6a05cad4	1854	default:
igorsk	0:b56b6a05cad4	1855	printer(arg, "0x%x", cishort);
igorsk	0:b56b6a05cad4	1856	}
igorsk	0:b56b6a05cad4	1857	}
igorsk	0:b56b6a05cad4	1858	break;
igorsk	0:b56b6a05cad4	1859	case CI_CALLBACK:
igorsk	0:b56b6a05cad4	1860	if (olen >= CILEN_CHAR) {
igorsk	0:b56b6a05cad4	1861	p += 2;
igorsk	0:b56b6a05cad4	1862	printer(arg, "callback ");
igorsk	0:b56b6a05cad4	1863	GETSHORT(cishort, p);
igorsk	0:b56b6a05cad4	1864	switch (cishort) {
igorsk	0:b56b6a05cad4	1865	case CBCP_OPT:
igorsk	0:b56b6a05cad4	1866	printer(arg, "CBCP");
igorsk	0:b56b6a05cad4	1867	break;
igorsk	0:b56b6a05cad4	1868	default:
igorsk	0:b56b6a05cad4	1869	printer(arg, "0x%x", cishort);
igorsk	0:b56b6a05cad4	1870	}
igorsk	0:b56b6a05cad4	1871	}
igorsk	0:b56b6a05cad4	1872	break;
igorsk	0:b56b6a05cad4	1873	case CI_MAGICNUMBER:
igorsk	0:b56b6a05cad4	1874	if (olen == CILEN_LONG) {
igorsk	0:b56b6a05cad4	1875	p += 2;
igorsk	0:b56b6a05cad4	1876	GETLONG(cilong, p);
igorsk	0:b56b6a05cad4	1877	printer(arg, "magic 0x%x", cilong);
igorsk	0:b56b6a05cad4	1878	}
igorsk	0:b56b6a05cad4	1879	break;
igorsk	0:b56b6a05cad4	1880	case CI_PCOMPRESSION:
igorsk	0:b56b6a05cad4	1881	if (olen == CILEN_VOID) {
igorsk	0:b56b6a05cad4	1882	p += 2;
igorsk	0:b56b6a05cad4	1883	printer(arg, "pcomp");
igorsk	0:b56b6a05cad4	1884	}
igorsk	0:b56b6a05cad4	1885	break;
igorsk	0:b56b6a05cad4	1886	case CI_ACCOMPRESSION:
igorsk	0:b56b6a05cad4	1887	if (olen == CILEN_VOID) {
igorsk	0:b56b6a05cad4	1888	p += 2;
igorsk	0:b56b6a05cad4	1889	printer(arg, "accomp");
igorsk	0:b56b6a05cad4	1890	}
igorsk	0:b56b6a05cad4	1891	break;
igorsk	0:b56b6a05cad4	1892	}
igorsk	0:b56b6a05cad4	1893	while (p < optend) {
igorsk	0:b56b6a05cad4	1894	GETCHAR(code, p);
igorsk	0:b56b6a05cad4	1895	printer(arg, " %.2x", code);
igorsk	0:b56b6a05cad4	1896	}
igorsk	0:b56b6a05cad4	1897	printer(arg, ">");
igorsk	0:b56b6a05cad4	1898	}
igorsk	0:b56b6a05cad4	1899	break;
igorsk	0:b56b6a05cad4	1900
igorsk	0:b56b6a05cad4	1901	case TERMACK:
igorsk	0:b56b6a05cad4	1902	case TERMREQ:
igorsk	0:b56b6a05cad4	1903	if (len > 0 && p >= ' ' && p < 0x7f) {
igorsk	0:b56b6a05cad4	1904	printer(arg, " ");
igorsk	0:b56b6a05cad4	1905	print_string((char*)p, len, printer, arg);
igorsk	0:b56b6a05cad4	1906	p += len;
igorsk	0:b56b6a05cad4	1907	len = 0;
igorsk	0:b56b6a05cad4	1908	}
igorsk	0:b56b6a05cad4	1909	break;
igorsk	0:b56b6a05cad4	1910
igorsk	0:b56b6a05cad4	1911	case ECHOREQ:
igorsk	0:b56b6a05cad4	1912	case ECHOREP:
igorsk	0:b56b6a05cad4	1913	case DISCREQ:
igorsk	0:b56b6a05cad4	1914	if (len >= 4) {
igorsk	0:b56b6a05cad4	1915	GETLONG(cilong, p);
igorsk	0:b56b6a05cad4	1916	printer(arg, " magic=0x%x", cilong);
igorsk	0:b56b6a05cad4	1917	p += 4;
igorsk	0:b56b6a05cad4	1918	len -= 4;
igorsk	0:b56b6a05cad4	1919	}
igorsk	0:b56b6a05cad4	1920	break;
igorsk	0:b56b6a05cad4	1921	}
igorsk	0:b56b6a05cad4	1922
igorsk	0:b56b6a05cad4	1923	/* print the rest of the bytes in the packet */
igorsk	0:b56b6a05cad4	1924	for (; len > 0; --len) {
igorsk	0:b56b6a05cad4	1925	GETCHAR(code, p);
igorsk	0:b56b6a05cad4	1926	printer(arg, " %.2x", code);
igorsk	0:b56b6a05cad4	1927	}
igorsk	0:b56b6a05cad4	1928
igorsk	0:b56b6a05cad4	1929	return (int)(p - pstart);
igorsk	0:b56b6a05cad4	1930	}
igorsk	0:b56b6a05cad4	1931	#endif /* PPP_ADDITIONAL_CALLBACKS */
igorsk	0:b56b6a05cad4	1932
igorsk	0:b56b6a05cad4	1933	/*
igorsk	0:b56b6a05cad4	1934	* Time to shut down the link because there is nothing out there.
igorsk	0:b56b6a05cad4	1935	*/
igorsk	0:b56b6a05cad4	1936	static void
igorsk	0:b56b6a05cad4	1937	LcpLinkFailure (fsm *f)
igorsk	0:b56b6a05cad4	1938	{
igorsk	0:b56b6a05cad4	1939	if (f->state == LS_OPENED) {
igorsk	0:b56b6a05cad4	1940	LCPDEBUG(LOG_INFO, ("No response to %d echo-requests\n", lcp_echos_pending));
igorsk	0:b56b6a05cad4	1941	LCPDEBUG(LOG_NOTICE, ("Serial link appears to be disconnected.\n"));
igorsk	0:b56b6a05cad4	1942	lcp_close(f->unit, "Peer not responding");
igorsk	0:b56b6a05cad4	1943	}
igorsk	0:b56b6a05cad4	1944	}
igorsk	0:b56b6a05cad4	1945
igorsk	0:b56b6a05cad4	1946	/*
igorsk	0:b56b6a05cad4	1947	* Timer expired for the LCP echo requests from this process.
igorsk	0:b56b6a05cad4	1948	*/
igorsk	0:b56b6a05cad4	1949	static void
igorsk	0:b56b6a05cad4	1950	LcpEchoCheck (fsm *f)
igorsk	0:b56b6a05cad4	1951	{
igorsk	0:b56b6a05cad4	1952	LcpSendEchoRequest (f);
igorsk	0:b56b6a05cad4	1953
igorsk	0:b56b6a05cad4	1954	/*
igorsk	0:b56b6a05cad4	1955	* Start the timer for the next interval.
igorsk	0:b56b6a05cad4	1956	*/
igorsk	0:b56b6a05cad4	1957	LWIP_ASSERT("lcp_echo_timer_running == 0", lcp_echo_timer_running == 0);
igorsk	0:b56b6a05cad4	1958
igorsk	0:b56b6a05cad4	1959	TIMEOUT (LcpEchoTimeout, f, lcp_echo_interval);
igorsk	0:b56b6a05cad4	1960	lcp_echo_timer_running = 1;
igorsk	0:b56b6a05cad4	1961	}
igorsk	0:b56b6a05cad4	1962
igorsk	0:b56b6a05cad4	1963	/*
igorsk	0:b56b6a05cad4	1964	* LcpEchoTimeout - Timer expired on the LCP echo
igorsk	0:b56b6a05cad4	1965	*/
igorsk	0:b56b6a05cad4	1966	static void
igorsk	0:b56b6a05cad4	1967	LcpEchoTimeout (void *arg)
igorsk	0:b56b6a05cad4	1968	{
igorsk	0:b56b6a05cad4	1969	if (lcp_echo_timer_running != 0) {
igorsk	0:b56b6a05cad4	1970	lcp_echo_timer_running = 0;
igorsk	0:b56b6a05cad4	1971	LcpEchoCheck ((fsm *) arg);
igorsk	0:b56b6a05cad4	1972	}
igorsk	0:b56b6a05cad4	1973	}
igorsk	0:b56b6a05cad4	1974
igorsk	0:b56b6a05cad4	1975	/*
igorsk	0:b56b6a05cad4	1976	* LcpEchoReply - LCP has received a reply to the echo
igorsk	0:b56b6a05cad4	1977	*/
igorsk	0:b56b6a05cad4	1978	static void
igorsk	0:b56b6a05cad4	1979	lcp_received_echo_reply (fsm f, int id, u_char inp, int len)
igorsk	0:b56b6a05cad4	1980	{
igorsk	0:b56b6a05cad4	1981	u32_t magic;
igorsk	0:b56b6a05cad4	1982
igorsk	0:b56b6a05cad4	1983	LWIP_UNUSED_ARG(id);
igorsk	0:b56b6a05cad4	1984
igorsk	0:b56b6a05cad4	1985	/* Check the magic number - don't count replies from ourselves. */
igorsk	0:b56b6a05cad4	1986	if (len < 4) {
igorsk	0:b56b6a05cad4	1987	LCPDEBUG(LOG_WARNING, ("lcp: received short Echo-Reply, length %d\n", len));
igorsk	0:b56b6a05cad4	1988	return;
igorsk	0:b56b6a05cad4	1989	}
igorsk	0:b56b6a05cad4	1990	GETLONG(magic, inp);
igorsk	0:b56b6a05cad4	1991	if (lcp_gotoptions[f->unit].neg_magicnumber && magic == lcp_gotoptions[f->unit].magicnumber) {
igorsk	0:b56b6a05cad4	1992	LCPDEBUG(LOG_WARNING, ("appear to have received our own echo-reply!\n"));
igorsk	0:b56b6a05cad4	1993	return;
igorsk	0:b56b6a05cad4	1994	}
igorsk	0:b56b6a05cad4	1995
igorsk	0:b56b6a05cad4	1996	/* Reset the number of outstanding echo frames */
igorsk	0:b56b6a05cad4	1997	lcp_echos_pending = 0;
igorsk	0:b56b6a05cad4	1998	}
igorsk	0:b56b6a05cad4	1999
igorsk	0:b56b6a05cad4	2000	/*
igorsk	0:b56b6a05cad4	2001	* LcpSendEchoRequest - Send an echo request frame to the peer
igorsk	0:b56b6a05cad4	2002	*/
igorsk	0:b56b6a05cad4	2003	static void
igorsk	0:b56b6a05cad4	2004	LcpSendEchoRequest (fsm *f)
igorsk	0:b56b6a05cad4	2005	{
igorsk	0:b56b6a05cad4	2006	u32_t lcp_magic;
igorsk	0:b56b6a05cad4	2007	u_char pkt[4], *pktp;
igorsk	0:b56b6a05cad4	2008
igorsk	0:b56b6a05cad4	2009	/*
igorsk	0:b56b6a05cad4	2010	* Detect the failure of the peer at this point.
igorsk	0:b56b6a05cad4	2011	*/
igorsk	0:b56b6a05cad4	2012	if (lcp_echo_fails != 0) {
igorsk	0:b56b6a05cad4	2013	if (lcp_echos_pending >= lcp_echo_fails) {
igorsk	0:b56b6a05cad4	2014	LcpLinkFailure(f);
igorsk	0:b56b6a05cad4	2015	lcp_echos_pending = 0;
igorsk	0:b56b6a05cad4	2016	}
igorsk	0:b56b6a05cad4	2017	}
igorsk	0:b56b6a05cad4	2018
igorsk	0:b56b6a05cad4	2019	/*
igorsk	0:b56b6a05cad4	2020	* Make and send the echo request frame.
igorsk	0:b56b6a05cad4	2021	*/
igorsk	0:b56b6a05cad4	2022	if (f->state == LS_OPENED) {
igorsk	0:b56b6a05cad4	2023	lcp_magic = lcp_gotoptions[f->unit].magicnumber;
igorsk	0:b56b6a05cad4	2024	pktp = pkt;
igorsk	0:b56b6a05cad4	2025	PUTLONG(lcp_magic, pktp);
igorsk	0:b56b6a05cad4	2026	fsm_sdata(f, ECHOREQ, (u_char)(lcp_echo_number++ & 0xFF), pkt, (int)(pktp - pkt));
igorsk	0:b56b6a05cad4	2027	++lcp_echos_pending;
igorsk	0:b56b6a05cad4	2028	}
igorsk	0:b56b6a05cad4	2029	}
igorsk	0:b56b6a05cad4	2030
igorsk	0:b56b6a05cad4	2031	/*
igorsk	0:b56b6a05cad4	2032	* lcp_echo_lowerup - Start the timer for the LCP frame
igorsk	0:b56b6a05cad4	2033	*/
igorsk	0:b56b6a05cad4	2034
igorsk	0:b56b6a05cad4	2035	static void
igorsk	0:b56b6a05cad4	2036	lcp_echo_lowerup (int unit)
igorsk	0:b56b6a05cad4	2037	{
igorsk	0:b56b6a05cad4	2038	fsm *f = &lcp_fsm[unit];
igorsk	0:b56b6a05cad4	2039
igorsk	0:b56b6a05cad4	2040	/* Clear the parameters for generating echo frames */
igorsk	0:b56b6a05cad4	2041	lcp_echos_pending = 0;
igorsk	0:b56b6a05cad4	2042	lcp_echo_number = 0;
igorsk	0:b56b6a05cad4	2043	lcp_echo_timer_running = 0;
igorsk	0:b56b6a05cad4	2044
igorsk	0:b56b6a05cad4	2045	/* If a timeout interval is specified then start the timer */
igorsk	0:b56b6a05cad4	2046	if (lcp_echo_interval != 0) {
igorsk	0:b56b6a05cad4	2047	LcpEchoCheck (f);
igorsk	0:b56b6a05cad4	2048	}
igorsk	0:b56b6a05cad4	2049	}
igorsk	0:b56b6a05cad4	2050
igorsk	0:b56b6a05cad4	2051	/*
igorsk	0:b56b6a05cad4	2052	* lcp_echo_lowerdown - Stop the timer for the LCP frame
igorsk	0:b56b6a05cad4	2053	*/
igorsk	0:b56b6a05cad4	2054
igorsk	0:b56b6a05cad4	2055	static void
igorsk	0:b56b6a05cad4	2056	lcp_echo_lowerdown (int unit)
igorsk	0:b56b6a05cad4	2057	{
igorsk	0:b56b6a05cad4	2058	fsm *f = &lcp_fsm[unit];
igorsk	0:b56b6a05cad4	2059
igorsk	0:b56b6a05cad4	2060	if (lcp_echo_timer_running != 0) {
igorsk	0:b56b6a05cad4	2061	UNTIMEOUT (LcpEchoTimeout, f);
igorsk	0:b56b6a05cad4	2062	lcp_echo_timer_running = 0;
igorsk	0:b56b6a05cad4	2063	}
igorsk	0:b56b6a05cad4	2064	}
igorsk	0:b56b6a05cad4	2065
igorsk	0:b56b6a05cad4	2066	#endif /* PPP_SUPPORT */

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Type:	Program
Created:	29 Jun 2011
Imports:	167
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	3

lwip/netif/ppp/lcp.c@0:b56b6a05cad4, 2011-06-29 (annotated)

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