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Dependencies: EthernetInterface SDFileSystem mbed-rtos mbed

EthernetInterface/lwip/netif/ppp/lcp.c@1:6465a3f5c58a, 2018-03-06 (annotated)

Committer:: sunyiming
Date:: Tue Mar 06 08:53:46 2018 +0000
Revision:: 1:6465a3f5c58a

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User	Revision	Line number	New contents of line
sunyiming	1:6465a3f5c58a	1	/*****************************************************************************
sunyiming	1:6465a3f5c58a	2	* lcp.c - Network Link Control Protocol program file.
sunyiming	1:6465a3f5c58a	3	*
sunyiming	1:6465a3f5c58a	4	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
sunyiming	1:6465a3f5c58a	5	* portions Copyright (c) 1997 by Global Election Systems Inc.
sunyiming	1:6465a3f5c58a	6	*
sunyiming	1:6465a3f5c58a	7	* The authors hereby grant permission to use, copy, modify, distribute,
sunyiming	1:6465a3f5c58a	8	* and license this software and its documentation for any purpose, provided
sunyiming	1:6465a3f5c58a	9	* that existing copyright notices are retained in all copies and that this
sunyiming	1:6465a3f5c58a	10	* notice and the following disclaimer are included verbatim in any
sunyiming	1:6465a3f5c58a	11	* distributions. No written agreement, license, or royalty fee is required
sunyiming	1:6465a3f5c58a	12	* for any of the authorized uses.
sunyiming	1:6465a3f5c58a	13	*
sunyiming	1:6465a3f5c58a	14	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
sunyiming	1:6465a3f5c58a	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
sunyiming	1:6465a3f5c58a	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
sunyiming	1:6465a3f5c58a	17	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
sunyiming	1:6465a3f5c58a	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
sunyiming	1:6465a3f5c58a	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
sunyiming	1:6465a3f5c58a	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
sunyiming	1:6465a3f5c58a	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
sunyiming	1:6465a3f5c58a	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
sunyiming	1:6465a3f5c58a	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
sunyiming	1:6465a3f5c58a	24	*
sunyiming	1:6465a3f5c58a	25	******************************************************************************
sunyiming	1:6465a3f5c58a	26	* REVISION HISTORY
sunyiming	1:6465a3f5c58a	27	*
sunyiming	1:6465a3f5c58a	28	* 03-01-01 Marc Boucher <marc@mbsi.ca>
sunyiming	1:6465a3f5c58a	29	* Ported to lwIP.
sunyiming	1:6465a3f5c58a	30	* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
sunyiming	1:6465a3f5c58a	31	* Original.
sunyiming	1:6465a3f5c58a	32	*****************************************************************************/
sunyiming	1:6465a3f5c58a	33
sunyiming	1:6465a3f5c58a	34	/*
sunyiming	1:6465a3f5c58a	35	* lcp.c - PPP Link Control Protocol.
sunyiming	1:6465a3f5c58a	36	*
sunyiming	1:6465a3f5c58a	37	* Copyright (c) 1989 Carnegie Mellon University.
sunyiming	1:6465a3f5c58a	38	* All rights reserved.
sunyiming	1:6465a3f5c58a	39	*
sunyiming	1:6465a3f5c58a	40	* Redistribution and use in source and binary forms are permitted
sunyiming	1:6465a3f5c58a	41	* provided that the above copyright notice and this paragraph are
sunyiming	1:6465a3f5c58a	42	* duplicated in all such forms and that any documentation,
sunyiming	1:6465a3f5c58a	43	* advertising materials, and other materials related to such
sunyiming	1:6465a3f5c58a	44	* distribution and use acknowledge that the software was developed
sunyiming	1:6465a3f5c58a	45	* by Carnegie Mellon University. The name of the
sunyiming	1:6465a3f5c58a	46	* University may not be used to endorse or promote products derived
sunyiming	1:6465a3f5c58a	47	* from this software without specific prior written permission.
sunyiming	1:6465a3f5c58a	48	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
sunyiming	1:6465a3f5c58a	49	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
sunyiming	1:6465a3f5c58a	50	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
sunyiming	1:6465a3f5c58a	51	*/
sunyiming	1:6465a3f5c58a	52
sunyiming	1:6465a3f5c58a	53
sunyiming	1:6465a3f5c58a	54	#include "lwip/opt.h"
sunyiming	1:6465a3f5c58a	55
sunyiming	1:6465a3f5c58a	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
sunyiming	1:6465a3f5c58a	57
sunyiming	1:6465a3f5c58a	58	#include "ppp.h"
sunyiming	1:6465a3f5c58a	59	#include "pppdebug.h"
sunyiming	1:6465a3f5c58a	60
sunyiming	1:6465a3f5c58a	61	#include "fsm.h"
sunyiming	1:6465a3f5c58a	62	#include "chap.h"
sunyiming	1:6465a3f5c58a	63	#include "magic.h"
sunyiming	1:6465a3f5c58a	64	#include "auth.h"
sunyiming	1:6465a3f5c58a	65	#include "lcp.h"
sunyiming	1:6465a3f5c58a	66
sunyiming	1:6465a3f5c58a	67	#include <string.h>
sunyiming	1:6465a3f5c58a	68
sunyiming	1:6465a3f5c58a	69	#if PPPOE_SUPPORT
sunyiming	1:6465a3f5c58a	70	#include "netif/ppp_oe.h"
sunyiming	1:6465a3f5c58a	71	#else
sunyiming	1:6465a3f5c58a	72	#define PPPOE_MAXMTU PPP_MAXMRU
sunyiming	1:6465a3f5c58a	73	#endif
sunyiming	1:6465a3f5c58a	74
sunyiming	1:6465a3f5c58a	75	#if 0 /* UNUSED */
sunyiming	1:6465a3f5c58a	76	/*
sunyiming	1:6465a3f5c58a	77	* LCP-related command-line options.
sunyiming	1:6465a3f5c58a	78	*/
sunyiming	1:6465a3f5c58a	79	int lcp_echo_interval = 0; /* Interval between LCP echo-requests */
sunyiming	1:6465a3f5c58a	80	int lcp_echo_fails = 0; /* Tolerance to unanswered echo-requests */
sunyiming	1:6465a3f5c58a	81	bool lax_recv = 0; /* accept control chars in asyncmap */
sunyiming	1:6465a3f5c58a	82
sunyiming	1:6465a3f5c58a	83	static int setescape (char **);
sunyiming	1:6465a3f5c58a	84
sunyiming	1:6465a3f5c58a	85	static option_t lcp_option_list[] = {
sunyiming	1:6465a3f5c58a	86	/* LCP options */
sunyiming	1:6465a3f5c58a	87	/* list stripped for simplicity */
sunyiming	1:6465a3f5c58a	88	{NULL}
sunyiming	1:6465a3f5c58a	89	};
sunyiming	1:6465a3f5c58a	90	#endif /* UNUSED */
sunyiming	1:6465a3f5c58a	91
sunyiming	1:6465a3f5c58a	92	/* options */
sunyiming	1:6465a3f5c58a	93	LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */
sunyiming	1:6465a3f5c58a	94	static u_int lcp_echo_interval = LCP_ECHOINTERVAL; /* Interval between LCP echo-requests */
sunyiming	1:6465a3f5c58a	95	static u_int lcp_echo_fails = LCP_MAXECHOFAILS; /* Tolerance to unanswered echo-requests */
sunyiming	1:6465a3f5c58a	96
sunyiming	1:6465a3f5c58a	97	/* global vars */
sunyiming	1:6465a3f5c58a	98	static fsm lcp_fsm[NUM_PPP]; /* LCP fsm structure (global)*/
sunyiming	1:6465a3f5c58a	99	lcp_options lcp_wantoptions[NUM_PPP]; /* Options that we want to request */
sunyiming	1:6465a3f5c58a	100	lcp_options lcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
sunyiming	1:6465a3f5c58a	101	lcp_options lcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
sunyiming	1:6465a3f5c58a	102	lcp_options lcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
sunyiming	1:6465a3f5c58a	103	ext_accm xmit_accm[NUM_PPP]; /* extended transmit ACCM */
sunyiming	1:6465a3f5c58a	104
sunyiming	1:6465a3f5c58a	105	static u32_t lcp_echos_pending = 0; /* Number of outstanding echo msgs */
sunyiming	1:6465a3f5c58a	106	static u32_t lcp_echo_number = 0; /* ID number of next echo frame */
sunyiming	1:6465a3f5c58a	107	static u32_t lcp_echo_timer_running = 0; /* TRUE if a timer is running */
sunyiming	1:6465a3f5c58a	108
sunyiming	1:6465a3f5c58a	109	/* @todo: do we really need such a large buffer? The typical 1500 bytes seem too much. */
sunyiming	1:6465a3f5c58a	110	static u_char nak_buffer[PPP_MRU] __attribute((section("AHBSRAM1"))); /* where we construct a nak packet */
sunyiming	1:6465a3f5c58a	111
sunyiming	1:6465a3f5c58a	112	/*
sunyiming	1:6465a3f5c58a	113	* Callbacks for fsm code. (CI = Configuration Information)
sunyiming	1:6465a3f5c58a	114	*/
sunyiming	1:6465a3f5c58a	115	static void lcp_resetci (fsm); / Reset our CI */
sunyiming	1:6465a3f5c58a	116	static int lcp_cilen (fsm); / Return length of our CI */
sunyiming	1:6465a3f5c58a	117	static void lcp_addci (fsm, u_char, int); / Add our CI to pkt */
sunyiming	1:6465a3f5c58a	118	static int lcp_ackci (fsm, u_char, int); /* Peer ack'd our CI */
sunyiming	1:6465a3f5c58a	119	static int lcp_nakci (fsm, u_char, int); /* Peer nak'd our CI */
sunyiming	1:6465a3f5c58a	120	static int lcp_rejci (fsm, u_char, int); /* Peer rej'd our CI */
sunyiming	1:6465a3f5c58a	121	static int lcp_reqci (fsm, u_char, int, int); / Rcv peer CI */
sunyiming	1:6465a3f5c58a	122	static void lcp_up (fsm); / We're UP */
sunyiming	1:6465a3f5c58a	123	static void lcp_down (fsm); / We're DOWN */
sunyiming	1:6465a3f5c58a	124	static void lcp_starting (fsm); / We need lower layer up */
sunyiming	1:6465a3f5c58a	125	static void lcp_finished (fsm); / We need lower layer down */
sunyiming	1:6465a3f5c58a	126	static int lcp_extcode (fsm, int, u_char, u_char, int);
sunyiming	1:6465a3f5c58a	127	static void lcp_rprotrej (fsm, u_char, int);
sunyiming	1:6465a3f5c58a	128
sunyiming	1:6465a3f5c58a	129	/*
sunyiming	1:6465a3f5c58a	130	* routines to send LCP echos to peer
sunyiming	1:6465a3f5c58a	131	*/
sunyiming	1:6465a3f5c58a	132
sunyiming	1:6465a3f5c58a	133	static void lcp_echo_lowerup (int);
sunyiming	1:6465a3f5c58a	134	static void lcp_echo_lowerdown (int);
sunyiming	1:6465a3f5c58a	135	static void LcpEchoTimeout (void*);
sunyiming	1:6465a3f5c58a	136	static void lcp_received_echo_reply (fsm, int, u_char, int);
sunyiming	1:6465a3f5c58a	137	static void LcpSendEchoRequest (fsm*);
sunyiming	1:6465a3f5c58a	138	static void LcpLinkFailure (fsm*);
sunyiming	1:6465a3f5c58a	139	static void LcpEchoCheck (fsm*);
sunyiming	1:6465a3f5c58a	140
sunyiming	1:6465a3f5c58a	141	static fsm_callbacks lcp_callbacks = { /* LCP callback routines */
sunyiming	1:6465a3f5c58a	142	lcp_resetci, /* Reset our Configuration Information */
sunyiming	1:6465a3f5c58a	143	lcp_cilen, /* Length of our Configuration Information */
sunyiming	1:6465a3f5c58a	144	lcp_addci, /* Add our Configuration Information */
sunyiming	1:6465a3f5c58a	145	lcp_ackci, /* ACK our Configuration Information */
sunyiming	1:6465a3f5c58a	146	lcp_nakci, /* NAK our Configuration Information */
sunyiming	1:6465a3f5c58a	147	lcp_rejci, /* Reject our Configuration Information */
sunyiming	1:6465a3f5c58a	148	lcp_reqci, /* Request peer's Configuration Information */
sunyiming	1:6465a3f5c58a	149	lcp_up, /* Called when fsm reaches LS_OPENED state */
sunyiming	1:6465a3f5c58a	150	lcp_down, /* Called when fsm leaves LS_OPENED state */
sunyiming	1:6465a3f5c58a	151	lcp_starting, /* Called when we want the lower layer up */
sunyiming	1:6465a3f5c58a	152	lcp_finished, /* Called when we want the lower layer down */
sunyiming	1:6465a3f5c58a	153	NULL, /* Called when Protocol-Reject received */
sunyiming	1:6465a3f5c58a	154	NULL, /* Retransmission is necessary */
sunyiming	1:6465a3f5c58a	155	lcp_extcode, /* Called to handle LCP-specific codes */
sunyiming	1:6465a3f5c58a	156	"LCP" /* String name of protocol */
sunyiming	1:6465a3f5c58a	157	};
sunyiming	1:6465a3f5c58a	158
sunyiming	1:6465a3f5c58a	159	/*
sunyiming	1:6465a3f5c58a	160	* Protocol entry points.
sunyiming	1:6465a3f5c58a	161	* Some of these are called directly.
sunyiming	1:6465a3f5c58a	162	*/
sunyiming	1:6465a3f5c58a	163
sunyiming	1:6465a3f5c58a	164	static void lcp_input (int, u_char *, int);
sunyiming	1:6465a3f5c58a	165	static void lcp_protrej (int);
sunyiming	1:6465a3f5c58a	166
sunyiming	1:6465a3f5c58a	167	struct protent lcp_protent = {
sunyiming	1:6465a3f5c58a	168	PPP_LCP,
sunyiming	1:6465a3f5c58a	169	lcp_init,
sunyiming	1:6465a3f5c58a	170	lcp_input,
sunyiming	1:6465a3f5c58a	171	lcp_protrej,
sunyiming	1:6465a3f5c58a	172	lcp_lowerup,
sunyiming	1:6465a3f5c58a	173	lcp_lowerdown,
sunyiming	1:6465a3f5c58a	174	lcp_open,
sunyiming	1:6465a3f5c58a	175	lcp_close,
sunyiming	1:6465a3f5c58a	176	#if PPP_ADDITIONAL_CALLBACKS
sunyiming	1:6465a3f5c58a	177	lcp_printpkt,
sunyiming	1:6465a3f5c58a	178	NULL,
sunyiming	1:6465a3f5c58a	179	#endif /* PPP_ADDITIONAL_CALLBACKS */
sunyiming	1:6465a3f5c58a	180	1,
sunyiming	1:6465a3f5c58a	181	"LCP",
sunyiming	1:6465a3f5c58a	182	#if PPP_ADDITIONAL_CALLBACKS
sunyiming	1:6465a3f5c58a	183	NULL,
sunyiming	1:6465a3f5c58a	184	NULL,
sunyiming	1:6465a3f5c58a	185	NULL
sunyiming	1:6465a3f5c58a	186	#endif /* PPP_ADDITIONAL_CALLBACKS */
sunyiming	1:6465a3f5c58a	187	};
sunyiming	1:6465a3f5c58a	188
sunyiming	1:6465a3f5c58a	189	int lcp_loopbackfail = DEFLOOPBACKFAIL;
sunyiming	1:6465a3f5c58a	190
sunyiming	1:6465a3f5c58a	191	/*
sunyiming	1:6465a3f5c58a	192	* Length of each type of configuration option (in octets)
sunyiming	1:6465a3f5c58a	193	*/
sunyiming	1:6465a3f5c58a	194	#define CILEN_VOID 2
sunyiming	1:6465a3f5c58a	195	#define CILEN_CHAR 3
sunyiming	1:6465a3f5c58a	196	#define CILEN_SHORT 4 /* CILEN_VOID + sizeof(short) */
sunyiming	1:6465a3f5c58a	197	#define CILEN_CHAP 5 /* CILEN_VOID + sizeof(short) + 1 */
sunyiming	1:6465a3f5c58a	198	#define CILEN_LONG 6 /* CILEN_VOID + sizeof(long) */
sunyiming	1:6465a3f5c58a	199	#define CILEN_LQR 8 /* CILEN_VOID + sizeof(short) + sizeof(long) */
sunyiming	1:6465a3f5c58a	200	#define CILEN_CBCP 3
sunyiming	1:6465a3f5c58a	201
sunyiming	1:6465a3f5c58a	202	#define CODENAME(x) ((x) == CONFACK ? "ACK" : (x) == CONFNAK ? "NAK" : "REJ")
sunyiming	1:6465a3f5c58a	203
sunyiming	1:6465a3f5c58a	204	#if 0 /* UNUSED */
sunyiming	1:6465a3f5c58a	205	/*
sunyiming	1:6465a3f5c58a	206	* setescape - add chars to the set we escape on transmission.
sunyiming	1:6465a3f5c58a	207	*/
sunyiming	1:6465a3f5c58a	208	static int
sunyiming	1:6465a3f5c58a	209	setescape(argv)
sunyiming	1:6465a3f5c58a	210	char **argv;
sunyiming	1:6465a3f5c58a	211	{
sunyiming	1:6465a3f5c58a	212	int n, ret;
sunyiming	1:6465a3f5c58a	213	char p, endp;
sunyiming	1:6465a3f5c58a	214
sunyiming	1:6465a3f5c58a	215	p = *argv;
sunyiming	1:6465a3f5c58a	216	ret = 1;
sunyiming	1:6465a3f5c58a	217	while (*p) {
sunyiming	1:6465a3f5c58a	218	n = strtol(p, &endp, 16);
sunyiming	1:6465a3f5c58a	219	if (p == endp) {
sunyiming	1:6465a3f5c58a	220	option_error("escape parameter contains invalid hex number '%s'", p);
sunyiming	1:6465a3f5c58a	221	return 0;
sunyiming	1:6465a3f5c58a	222	}
sunyiming	1:6465a3f5c58a	223	p = endp;
sunyiming	1:6465a3f5c58a	224	if (n < 0 \|\| n == 0x5E \|\| n > 0xFF) {
sunyiming	1:6465a3f5c58a	225	option_error("can't escape character 0x%x", n);
sunyiming	1:6465a3f5c58a	226	ret = 0;
sunyiming	1:6465a3f5c58a	227	} else
sunyiming	1:6465a3f5c58a	228	xmit_accm[0][n >> 5] \|= 1 << (n & 0x1F);
sunyiming	1:6465a3f5c58a	229	while (p == ',' \|\| p == ' ')
sunyiming	1:6465a3f5c58a	230	++p;
sunyiming	1:6465a3f5c58a	231	}
sunyiming	1:6465a3f5c58a	232	return ret;
sunyiming	1:6465a3f5c58a	233	}
sunyiming	1:6465a3f5c58a	234	#endif /* UNUSED */
sunyiming	1:6465a3f5c58a	235
sunyiming	1:6465a3f5c58a	236	/*
sunyiming	1:6465a3f5c58a	237	* lcp_init - Initialize LCP.
sunyiming	1:6465a3f5c58a	238	*/
sunyiming	1:6465a3f5c58a	239	void
sunyiming	1:6465a3f5c58a	240	lcp_init(int unit)
sunyiming	1:6465a3f5c58a	241	{
sunyiming	1:6465a3f5c58a	242	fsm *f = &lcp_fsm[unit];
sunyiming	1:6465a3f5c58a	243	lcp_options *wo = &lcp_wantoptions[unit];
sunyiming	1:6465a3f5c58a	244	lcp_options *ao = &lcp_allowoptions[unit];
sunyiming	1:6465a3f5c58a	245
sunyiming	1:6465a3f5c58a	246	f->unit = unit;
sunyiming	1:6465a3f5c58a	247	f->protocol = PPP_LCP;
sunyiming	1:6465a3f5c58a	248	f->callbacks = &lcp_callbacks;
sunyiming	1:6465a3f5c58a	249
sunyiming	1:6465a3f5c58a	250	fsm_init(f);
sunyiming	1:6465a3f5c58a	251
sunyiming	1:6465a3f5c58a	252	wo->passive = 0;
sunyiming	1:6465a3f5c58a	253	wo->silent = 0;
sunyiming	1:6465a3f5c58a	254	wo->restart = 0; /* Set to 1 in kernels or multi-line implementations */
sunyiming	1:6465a3f5c58a	255	wo->neg_mru = 1;
sunyiming	1:6465a3f5c58a	256	wo->mru = PPP_DEFMRU;
sunyiming	1:6465a3f5c58a	257	wo->neg_asyncmap = 1;
sunyiming	1:6465a3f5c58a	258	wo->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
sunyiming	1:6465a3f5c58a	259	wo->neg_chap = 0; /* Set to 1 on server */
sunyiming	1:6465a3f5c58a	260	wo->neg_upap = 0; /* Set to 1 on server */
sunyiming	1:6465a3f5c58a	261	wo->chap_mdtype = CHAP_DIGEST_MD5;
sunyiming	1:6465a3f5c58a	262	wo->neg_magicnumber = 1;
sunyiming	1:6465a3f5c58a	263	wo->neg_pcompression = 1;
sunyiming	1:6465a3f5c58a	264	wo->neg_accompression = 1;
sunyiming	1:6465a3f5c58a	265	wo->neg_lqr = 0; /* no LQR implementation yet */
sunyiming	1:6465a3f5c58a	266	wo->neg_cbcp = 0;
sunyiming	1:6465a3f5c58a	267
sunyiming	1:6465a3f5c58a	268	ao->neg_mru = 1;
sunyiming	1:6465a3f5c58a	269	ao->mru = PPP_MAXMRU;
sunyiming	1:6465a3f5c58a	270	ao->neg_asyncmap = 1;
sunyiming	1:6465a3f5c58a	271	ao->asyncmap = 0x00000000l; /* Assume don't need to escape any ctl chars. */
sunyiming	1:6465a3f5c58a	272	ao->neg_chap = (CHAP_SUPPORT != 0);
sunyiming	1:6465a3f5c58a	273	ao->chap_mdtype = CHAP_DIGEST_MD5;
sunyiming	1:6465a3f5c58a	274	ao->neg_upap = (PAP_SUPPORT != 0);
sunyiming	1:6465a3f5c58a	275	ao->neg_magicnumber = 1;
sunyiming	1:6465a3f5c58a	276	ao->neg_pcompression = 1;
sunyiming	1:6465a3f5c58a	277	ao->neg_accompression = 1;
sunyiming	1:6465a3f5c58a	278	ao->neg_lqr = 0; /* no LQR implementation yet */
sunyiming	1:6465a3f5c58a	279	ao->neg_cbcp = (CBCP_SUPPORT != 0);
sunyiming	1:6465a3f5c58a	280
sunyiming	1:6465a3f5c58a	281	/*
sunyiming	1:6465a3f5c58a	282	* Set transmit escape for the flag and escape characters plus anything
sunyiming	1:6465a3f5c58a	283	* set for the allowable options.
sunyiming	1:6465a3f5c58a	284	*/
sunyiming	1:6465a3f5c58a	285	memset(xmit_accm[unit], 0, sizeof(xmit_accm[0]));
sunyiming	1:6465a3f5c58a	286	xmit_accm[unit][15] = 0x60;
sunyiming	1:6465a3f5c58a	287	xmit_accm[unit][0] = (u_char)((ao->asyncmap & 0xFF));
sunyiming	1:6465a3f5c58a	288	xmit_accm[unit][1] = (u_char)((ao->asyncmap >> 8) & 0xFF);
sunyiming	1:6465a3f5c58a	289	xmit_accm[unit][2] = (u_char)((ao->asyncmap >> 16) & 0xFF);
sunyiming	1:6465a3f5c58a	290	xmit_accm[unit][3] = (u_char)((ao->asyncmap >> 24) & 0xFF);
sunyiming	1:6465a3f5c58a	291	LCPDEBUG(LOG_INFO, ("lcp_init: xmit_accm=%X %X %X %X\n",
sunyiming	1:6465a3f5c58a	292	xmit_accm[unit][0],
sunyiming	1:6465a3f5c58a	293	xmit_accm[unit][1],
sunyiming	1:6465a3f5c58a	294	xmit_accm[unit][2],
sunyiming	1:6465a3f5c58a	295	xmit_accm[unit][3]));
sunyiming	1:6465a3f5c58a	296
sunyiming	1:6465a3f5c58a	297	lcp_phase[unit] = PHASE_INITIALIZE;
sunyiming	1:6465a3f5c58a	298	}
sunyiming	1:6465a3f5c58a	299
sunyiming	1:6465a3f5c58a	300
sunyiming	1:6465a3f5c58a	301	/*
sunyiming	1:6465a3f5c58a	302	* lcp_open - LCP is allowed to come up.
sunyiming	1:6465a3f5c58a	303	*/
sunyiming	1:6465a3f5c58a	304	void
sunyiming	1:6465a3f5c58a	305	lcp_open(int unit)
sunyiming	1:6465a3f5c58a	306	{
sunyiming	1:6465a3f5c58a	307	fsm *f = &lcp_fsm[unit];
sunyiming	1:6465a3f5c58a	308	lcp_options *wo = &lcp_wantoptions[unit];
sunyiming	1:6465a3f5c58a	309
sunyiming	1:6465a3f5c58a	310	f->flags = 0;
sunyiming	1:6465a3f5c58a	311	if (wo->passive) {
sunyiming	1:6465a3f5c58a	312	f->flags \|= OPT_PASSIVE;
sunyiming	1:6465a3f5c58a	313	}
sunyiming	1:6465a3f5c58a	314	if (wo->silent) {
sunyiming	1:6465a3f5c58a	315	f->flags \|= OPT_SILENT;
sunyiming	1:6465a3f5c58a	316	}
sunyiming	1:6465a3f5c58a	317	fsm_open(f);
sunyiming	1:6465a3f5c58a	318
sunyiming	1:6465a3f5c58a	319	lcp_phase[unit] = PHASE_ESTABLISH;
sunyiming	1:6465a3f5c58a	320	}
sunyiming	1:6465a3f5c58a	321
sunyiming	1:6465a3f5c58a	322
sunyiming	1:6465a3f5c58a	323	/*
sunyiming	1:6465a3f5c58a	324	* lcp_close - Take LCP down.
sunyiming	1:6465a3f5c58a	325	*/
sunyiming	1:6465a3f5c58a	326	void
sunyiming	1:6465a3f5c58a	327	lcp_close(int unit, char *reason)
sunyiming	1:6465a3f5c58a	328	{
sunyiming	1:6465a3f5c58a	329	fsm *f = &lcp_fsm[unit];
sunyiming	1:6465a3f5c58a	330
sunyiming	1:6465a3f5c58a	331	if (lcp_phase[unit] != PHASE_DEAD) {
sunyiming	1:6465a3f5c58a	332	lcp_phase[unit] = PHASE_TERMINATE;
sunyiming	1:6465a3f5c58a	333	}
sunyiming	1:6465a3f5c58a	334	if (f->state == LS_STOPPED && f->flags & (OPT_PASSIVE\|OPT_SILENT)) {
sunyiming	1:6465a3f5c58a	335	/*
sunyiming	1:6465a3f5c58a	336	* This action is not strictly according to the FSM in RFC1548,
sunyiming	1:6465a3f5c58a	337	* but it does mean that the program terminates if you do an
sunyiming	1:6465a3f5c58a	338	* lcp_close() in passive/silent mode when a connection hasn't
sunyiming	1:6465a3f5c58a	339	* been established.
sunyiming	1:6465a3f5c58a	340	*/
sunyiming	1:6465a3f5c58a	341	f->state = LS_CLOSED;
sunyiming	1:6465a3f5c58a	342	lcp_finished(f);
sunyiming	1:6465a3f5c58a	343	} else {
sunyiming	1:6465a3f5c58a	344	fsm_close(f, reason);
sunyiming	1:6465a3f5c58a	345	}
sunyiming	1:6465a3f5c58a	346	}
sunyiming	1:6465a3f5c58a	347
sunyiming	1:6465a3f5c58a	348
sunyiming	1:6465a3f5c58a	349	/*
sunyiming	1:6465a3f5c58a	350	* lcp_lowerup - The lower layer is up.
sunyiming	1:6465a3f5c58a	351	*/
sunyiming	1:6465a3f5c58a	352	void
sunyiming	1:6465a3f5c58a	353	lcp_lowerup(int unit)
sunyiming	1:6465a3f5c58a	354	{
sunyiming	1:6465a3f5c58a	355	lcp_options *wo = &lcp_wantoptions[unit];
sunyiming	1:6465a3f5c58a	356
sunyiming	1:6465a3f5c58a	357	/*
sunyiming	1:6465a3f5c58a	358	* Don't use A/C or protocol compression on transmission,
sunyiming	1:6465a3f5c58a	359	* but accept A/C and protocol compressed packets
sunyiming	1:6465a3f5c58a	360	* if we are going to ask for A/C and protocol compression.
sunyiming	1:6465a3f5c58a	361	*/
sunyiming	1:6465a3f5c58a	362	ppp_set_xaccm(unit, &xmit_accm[unit]);
sunyiming	1:6465a3f5c58a	363	ppp_send_config(unit, PPP_MRU, 0xffffffffl, 0, 0);
sunyiming	1:6465a3f5c58a	364	ppp_recv_config(unit, PPP_MRU, 0x00000000l,
sunyiming	1:6465a3f5c58a	365	wo->neg_pcompression, wo->neg_accompression);
sunyiming	1:6465a3f5c58a	366	peer_mru[unit] = PPP_MRU;
sunyiming	1:6465a3f5c58a	367	lcp_allowoptions[unit].asyncmap = (u_long)xmit_accm[unit][0]
sunyiming	1:6465a3f5c58a	368	\| ((u_long)xmit_accm[unit][1] << 8)
sunyiming	1:6465a3f5c58a	369	\| ((u_long)xmit_accm[unit][2] << 16)
sunyiming	1:6465a3f5c58a	370	\| ((u_long)xmit_accm[unit][3] << 24);
sunyiming	1:6465a3f5c58a	371	LCPDEBUG(LOG_INFO, ("lcp_lowerup: asyncmap=%X %X %X %X\n",
sunyiming	1:6465a3f5c58a	372	xmit_accm[unit][3],
sunyiming	1:6465a3f5c58a	373	xmit_accm[unit][2],
sunyiming	1:6465a3f5c58a	374	xmit_accm[unit][1],
sunyiming	1:6465a3f5c58a	375	xmit_accm[unit][0]));
sunyiming	1:6465a3f5c58a	376
sunyiming	1:6465a3f5c58a	377	fsm_lowerup(&lcp_fsm[unit]);
sunyiming	1:6465a3f5c58a	378	}
sunyiming	1:6465a3f5c58a	379
sunyiming	1:6465a3f5c58a	380
sunyiming	1:6465a3f5c58a	381	/*
sunyiming	1:6465a3f5c58a	382	* lcp_lowerdown - The lower layer is down.
sunyiming	1:6465a3f5c58a	383	*/
sunyiming	1:6465a3f5c58a	384	void
sunyiming	1:6465a3f5c58a	385	lcp_lowerdown(int unit)
sunyiming	1:6465a3f5c58a	386	{
sunyiming	1:6465a3f5c58a	387	fsm_lowerdown(&lcp_fsm[unit]);
sunyiming	1:6465a3f5c58a	388	}
sunyiming	1:6465a3f5c58a	389
sunyiming	1:6465a3f5c58a	390
sunyiming	1:6465a3f5c58a	391	/*
sunyiming	1:6465a3f5c58a	392	* lcp_input - Input LCP packet.
sunyiming	1:6465a3f5c58a	393	*/
sunyiming	1:6465a3f5c58a	394	static void
sunyiming	1:6465a3f5c58a	395	lcp_input(int unit, u_char *p, int len)
sunyiming	1:6465a3f5c58a	396	{
sunyiming	1:6465a3f5c58a	397	fsm *f = &lcp_fsm[unit];
sunyiming	1:6465a3f5c58a	398
sunyiming	1:6465a3f5c58a	399	fsm_input(f, p, len);
sunyiming	1:6465a3f5c58a	400	}
sunyiming	1:6465a3f5c58a	401
sunyiming	1:6465a3f5c58a	402
sunyiming	1:6465a3f5c58a	403	/*
sunyiming	1:6465a3f5c58a	404	* lcp_extcode - Handle a LCP-specific code.
sunyiming	1:6465a3f5c58a	405	*/
sunyiming	1:6465a3f5c58a	406	static int
sunyiming	1:6465a3f5c58a	407	lcp_extcode(fsm f, int code, u_char id, u_char inp, int len)
sunyiming	1:6465a3f5c58a	408	{
sunyiming	1:6465a3f5c58a	409	u_char *magp;
sunyiming	1:6465a3f5c58a	410
sunyiming	1:6465a3f5c58a	411	switch( code ){
sunyiming	1:6465a3f5c58a	412	case PROTREJ:
sunyiming	1:6465a3f5c58a	413	lcp_rprotrej(f, inp, len);
sunyiming	1:6465a3f5c58a	414	break;
sunyiming	1:6465a3f5c58a	415
sunyiming	1:6465a3f5c58a	416	case ECHOREQ:
sunyiming	1:6465a3f5c58a	417	if (f->state != LS_OPENED) {
sunyiming	1:6465a3f5c58a	418	break;
sunyiming	1:6465a3f5c58a	419	}
sunyiming	1:6465a3f5c58a	420	LCPDEBUG(LOG_INFO, ("lcp: Echo-Request, Rcvd id %d\n", id));
sunyiming	1:6465a3f5c58a	421	magp = inp;
sunyiming	1:6465a3f5c58a	422	PUTLONG(lcp_gotoptions[f->unit].magicnumber, magp);
sunyiming	1:6465a3f5c58a	423	fsm_sdata(f, ECHOREP, id, inp, len);
sunyiming	1:6465a3f5c58a	424	break;
sunyiming	1:6465a3f5c58a	425
sunyiming	1:6465a3f5c58a	426	case ECHOREP:
sunyiming	1:6465a3f5c58a	427	lcp_received_echo_reply(f, id, inp, len);
sunyiming	1:6465a3f5c58a	428	break;
sunyiming	1:6465a3f5c58a	429
sunyiming	1:6465a3f5c58a	430	case DISCREQ:
sunyiming	1:6465a3f5c58a	431	break;
sunyiming	1:6465a3f5c58a	432
sunyiming	1:6465a3f5c58a	433	default:
sunyiming	1:6465a3f5c58a	434	return 0;
sunyiming	1:6465a3f5c58a	435	}
sunyiming	1:6465a3f5c58a	436	return 1;
sunyiming	1:6465a3f5c58a	437	}
sunyiming	1:6465a3f5c58a	438
sunyiming	1:6465a3f5c58a	439
sunyiming	1:6465a3f5c58a	440	/*
sunyiming	1:6465a3f5c58a	441	* lcp_rprotrej - Receive an Protocol-Reject.
sunyiming	1:6465a3f5c58a	442	*
sunyiming	1:6465a3f5c58a	443	* Figure out which protocol is rejected and inform it.
sunyiming	1:6465a3f5c58a	444	*/
sunyiming	1:6465a3f5c58a	445	static void
sunyiming	1:6465a3f5c58a	446	lcp_rprotrej(fsm f, u_char inp, int len)
sunyiming	1:6465a3f5c58a	447	{
sunyiming	1:6465a3f5c58a	448	int i;
sunyiming	1:6465a3f5c58a	449	struct protent *protp;
sunyiming	1:6465a3f5c58a	450	u_short prot;
sunyiming	1:6465a3f5c58a	451
sunyiming	1:6465a3f5c58a	452	if (len < (int)sizeof (u_short)) {
sunyiming	1:6465a3f5c58a	453	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd short Protocol-Reject packet!\n"));
sunyiming	1:6465a3f5c58a	454	return;
sunyiming	1:6465a3f5c58a	455	}
sunyiming	1:6465a3f5c58a	456
sunyiming	1:6465a3f5c58a	457	GETSHORT(prot, inp);
sunyiming	1:6465a3f5c58a	458
sunyiming	1:6465a3f5c58a	459	LCPDEBUG(LOG_INFO, ("lcp_rprotrej: Rcvd Protocol-Reject packet for %x!\n", prot));
sunyiming	1:6465a3f5c58a	460
sunyiming	1:6465a3f5c58a	461	/*
sunyiming	1:6465a3f5c58a	462	* Protocol-Reject packets received in any state other than the LCP
sunyiming	1:6465a3f5c58a	463	* LS_OPENED state SHOULD be silently discarded.
sunyiming	1:6465a3f5c58a	464	*/
sunyiming	1:6465a3f5c58a	465	if( f->state != LS_OPENED ) {
sunyiming	1:6465a3f5c58a	466	LCPDEBUG(LOG_INFO, ("Protocol-Reject discarded: LCP in state %d\n", f->state));
sunyiming	1:6465a3f5c58a	467	return;
sunyiming	1:6465a3f5c58a	468	}
sunyiming	1:6465a3f5c58a	469
sunyiming	1:6465a3f5c58a	470	/*
sunyiming	1:6465a3f5c58a	471	* Upcall the proper Protocol-Reject routine.
sunyiming	1:6465a3f5c58a	472	*/
sunyiming	1:6465a3f5c58a	473	for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
sunyiming	1:6465a3f5c58a	474	if (protp->protocol == prot && protp->enabled_flag) {
sunyiming	1:6465a3f5c58a	475	(*protp->protrej)(f->unit);
sunyiming	1:6465a3f5c58a	476	return;
sunyiming	1:6465a3f5c58a	477	}
sunyiming	1:6465a3f5c58a	478	}
sunyiming	1:6465a3f5c58a	479
sunyiming	1:6465a3f5c58a	480	LCPDEBUG(LOG_WARNING, ("Protocol-Reject for unsupported protocol 0x%x\n", prot));
sunyiming	1:6465a3f5c58a	481	}
sunyiming	1:6465a3f5c58a	482
sunyiming	1:6465a3f5c58a	483
sunyiming	1:6465a3f5c58a	484	/*
sunyiming	1:6465a3f5c58a	485	* lcp_protrej - A Protocol-Reject was received.
sunyiming	1:6465a3f5c58a	486	*/
sunyiming	1:6465a3f5c58a	487	static void
sunyiming	1:6465a3f5c58a	488	lcp_protrej(int unit)
sunyiming	1:6465a3f5c58a	489	{
sunyiming	1:6465a3f5c58a	490	LWIP_UNUSED_ARG(unit);
sunyiming	1:6465a3f5c58a	491	/*
sunyiming	1:6465a3f5c58a	492	* Can't reject LCP!
sunyiming	1:6465a3f5c58a	493	*/
sunyiming	1:6465a3f5c58a	494	LCPDEBUG(LOG_WARNING, ("lcp_protrej: Received Protocol-Reject for LCP!\n"));
sunyiming	1:6465a3f5c58a	495	fsm_protreject(&lcp_fsm[unit]);
sunyiming	1:6465a3f5c58a	496	}
sunyiming	1:6465a3f5c58a	497
sunyiming	1:6465a3f5c58a	498
sunyiming	1:6465a3f5c58a	499	/*
sunyiming	1:6465a3f5c58a	500	* lcp_sprotrej - Send a Protocol-Reject for some protocol.
sunyiming	1:6465a3f5c58a	501	*/
sunyiming	1:6465a3f5c58a	502	void
sunyiming	1:6465a3f5c58a	503	lcp_sprotrej(int unit, u_char *p, int len)
sunyiming	1:6465a3f5c58a	504	{
sunyiming	1:6465a3f5c58a	505	/*
sunyiming	1:6465a3f5c58a	506	* Send back the protocol and the information field of the
sunyiming	1:6465a3f5c58a	507	* rejected packet. We only get here if LCP is in the LS_OPENED state.
sunyiming	1:6465a3f5c58a	508	*/
sunyiming	1:6465a3f5c58a	509
sunyiming	1:6465a3f5c58a	510	fsm_sdata(&lcp_fsm[unit], PROTREJ, ++lcp_fsm[unit].id, p, len);
sunyiming	1:6465a3f5c58a	511	}
sunyiming	1:6465a3f5c58a	512
sunyiming	1:6465a3f5c58a	513
sunyiming	1:6465a3f5c58a	514	/*
sunyiming	1:6465a3f5c58a	515	* lcp_resetci - Reset our CI.
sunyiming	1:6465a3f5c58a	516	*/
sunyiming	1:6465a3f5c58a	517	static void
sunyiming	1:6465a3f5c58a	518	lcp_resetci(fsm *f)
sunyiming	1:6465a3f5c58a	519	{
sunyiming	1:6465a3f5c58a	520	lcp_wantoptions[f->unit].magicnumber = magic();
sunyiming	1:6465a3f5c58a	521	lcp_wantoptions[f->unit].numloops = 0;
sunyiming	1:6465a3f5c58a	522	lcp_gotoptions[f->unit] = lcp_wantoptions[f->unit];
sunyiming	1:6465a3f5c58a	523	peer_mru[f->unit] = PPP_MRU;
sunyiming	1:6465a3f5c58a	524	auth_reset(f->unit);
sunyiming	1:6465a3f5c58a	525	}
sunyiming	1:6465a3f5c58a	526
sunyiming	1:6465a3f5c58a	527
sunyiming	1:6465a3f5c58a	528	/*
sunyiming	1:6465a3f5c58a	529	* lcp_cilen - Return length of our CI.
sunyiming	1:6465a3f5c58a	530	*/
sunyiming	1:6465a3f5c58a	531	static int
sunyiming	1:6465a3f5c58a	532	lcp_cilen(fsm *f)
sunyiming	1:6465a3f5c58a	533	{
sunyiming	1:6465a3f5c58a	534	lcp_options *go = &lcp_gotoptions[f->unit];
sunyiming	1:6465a3f5c58a	535
sunyiming	1:6465a3f5c58a	536	#define LENCIVOID(neg) ((neg) ? CILEN_VOID : 0)
sunyiming	1:6465a3f5c58a	537	#define LENCICHAP(neg) ((neg) ? CILEN_CHAP : 0)
sunyiming	1:6465a3f5c58a	538	#define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0)
sunyiming	1:6465a3f5c58a	539	#define LENCILONG(neg) ((neg) ? CILEN_LONG : 0)
sunyiming	1:6465a3f5c58a	540	#define LENCILQR(neg) ((neg) ? CILEN_LQR: 0)
sunyiming	1:6465a3f5c58a	541	#define LENCICBCP(neg) ((neg) ? CILEN_CBCP: 0)
sunyiming	1:6465a3f5c58a	542	/*
sunyiming	1:6465a3f5c58a	543	* NB: we only ask for one of CHAP and UPAP, even if we will
sunyiming	1:6465a3f5c58a	544	* accept either.
sunyiming	1:6465a3f5c58a	545	*/
sunyiming	1:6465a3f5c58a	546	return (LENCISHORT(go->neg_mru && go->mru != PPP_DEFMRU) +
sunyiming	1:6465a3f5c58a	547	LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) +
sunyiming	1:6465a3f5c58a	548	LENCICHAP(go->neg_chap) +
sunyiming	1:6465a3f5c58a	549	LENCISHORT(!go->neg_chap && go->neg_upap) +
sunyiming	1:6465a3f5c58a	550	LENCILQR(go->neg_lqr) +
sunyiming	1:6465a3f5c58a	551	LENCICBCP(go->neg_cbcp) +
sunyiming	1:6465a3f5c58a	552	LENCILONG(go->neg_magicnumber) +
sunyiming	1:6465a3f5c58a	553	LENCIVOID(go->neg_pcompression) +
sunyiming	1:6465a3f5c58a	554	LENCIVOID(go->neg_accompression));
sunyiming	1:6465a3f5c58a	555	}
sunyiming	1:6465a3f5c58a	556
sunyiming	1:6465a3f5c58a	557
sunyiming	1:6465a3f5c58a	558	/*
sunyiming	1:6465a3f5c58a	559	* lcp_addci - Add our desired CIs to a packet.
sunyiming	1:6465a3f5c58a	560	*/
sunyiming	1:6465a3f5c58a	561	static void
sunyiming	1:6465a3f5c58a	562	lcp_addci(fsm f, u_char ucp, int *lenp)
sunyiming	1:6465a3f5c58a	563	{
sunyiming	1:6465a3f5c58a	564	lcp_options *go = &lcp_gotoptions[f->unit];
sunyiming	1:6465a3f5c58a	565	u_char *start_ucp = ucp;
sunyiming	1:6465a3f5c58a	566
sunyiming	1:6465a3f5c58a	567	#define ADDCIVOID(opt, neg) \
sunyiming	1:6465a3f5c58a	568	if (neg) { \
sunyiming	1:6465a3f5c58a	569	LCPDEBUG(LOG_INFO, ("lcp_addci: opt=%d\n", opt)); \
sunyiming	1:6465a3f5c58a	570	PUTCHAR(opt, ucp); \
sunyiming	1:6465a3f5c58a	571	PUTCHAR(CILEN_VOID, ucp); \
sunyiming	1:6465a3f5c58a	572	}
sunyiming	1:6465a3f5c58a	573	#define ADDCISHORT(opt, neg, val) \
sunyiming	1:6465a3f5c58a	574	if (neg) { \
sunyiming	1:6465a3f5c58a	575	LCPDEBUG(LOG_INFO, ("lcp_addci: INT opt=%d %X\n", opt, val)); \
sunyiming	1:6465a3f5c58a	576	PUTCHAR(opt, ucp); \
sunyiming	1:6465a3f5c58a	577	PUTCHAR(CILEN_SHORT, ucp); \
sunyiming	1:6465a3f5c58a	578	PUTSHORT(val, ucp); \
sunyiming	1:6465a3f5c58a	579	}
sunyiming	1:6465a3f5c58a	580	#define ADDCICHAP(opt, neg, val, digest) \
sunyiming	1:6465a3f5c58a	581	if (neg) { \
sunyiming	1:6465a3f5c58a	582	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAP opt=%d %X\n", opt, val)); \
sunyiming	1:6465a3f5c58a	583	PUTCHAR(opt, ucp); \
sunyiming	1:6465a3f5c58a	584	PUTCHAR(CILEN_CHAP, ucp); \
sunyiming	1:6465a3f5c58a	585	PUTSHORT(val, ucp); \
sunyiming	1:6465a3f5c58a	586	PUTCHAR(digest, ucp); \
sunyiming	1:6465a3f5c58a	587	}
sunyiming	1:6465a3f5c58a	588	#define ADDCILONG(opt, neg, val) \
sunyiming	1:6465a3f5c58a	589	if (neg) { \
sunyiming	1:6465a3f5c58a	590	LCPDEBUG(LOG_INFO, ("lcp_addci: L opt=%d %lX\n", opt, val)); \
sunyiming	1:6465a3f5c58a	591	PUTCHAR(opt, ucp); \
sunyiming	1:6465a3f5c58a	592	PUTCHAR(CILEN_LONG, ucp); \
sunyiming	1:6465a3f5c58a	593	PUTLONG(val, ucp); \
sunyiming	1:6465a3f5c58a	594	}
sunyiming	1:6465a3f5c58a	595	#define ADDCILQR(opt, neg, val) \
sunyiming	1:6465a3f5c58a	596	if (neg) { \
sunyiming	1:6465a3f5c58a	597	LCPDEBUG(LOG_INFO, ("lcp_addci: LQR opt=%d %lX\n", opt, val)); \
sunyiming	1:6465a3f5c58a	598	PUTCHAR(opt, ucp); \
sunyiming	1:6465a3f5c58a	599	PUTCHAR(CILEN_LQR, ucp); \
sunyiming	1:6465a3f5c58a	600	PUTSHORT(PPP_LQR, ucp); \
sunyiming	1:6465a3f5c58a	601	PUTLONG(val, ucp); \
sunyiming	1:6465a3f5c58a	602	}
sunyiming	1:6465a3f5c58a	603	#define ADDCICHAR(opt, neg, val) \
sunyiming	1:6465a3f5c58a	604	if (neg) { \
sunyiming	1:6465a3f5c58a	605	LCPDEBUG(LOG_INFO, ("lcp_addci: CHAR opt=%d %X '%z'\n", opt, val, val)); \
sunyiming	1:6465a3f5c58a	606	PUTCHAR(opt, ucp); \
sunyiming	1:6465a3f5c58a	607	PUTCHAR(CILEN_CHAR, ucp); \
sunyiming	1:6465a3f5c58a	608	PUTCHAR(val, ucp); \
sunyiming	1:6465a3f5c58a	609	}
sunyiming	1:6465a3f5c58a	610
sunyiming	1:6465a3f5c58a	611	ADDCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
sunyiming	1:6465a3f5c58a	612	ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
sunyiming	1:6465a3f5c58a	613	ADDCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
sunyiming	1:6465a3f5c58a	614	ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
sunyiming	1:6465a3f5c58a	615	ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
sunyiming	1:6465a3f5c58a	616	ADDCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
sunyiming	1:6465a3f5c58a	617	ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
sunyiming	1:6465a3f5c58a	618	ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
sunyiming	1:6465a3f5c58a	619	ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
sunyiming	1:6465a3f5c58a	620
sunyiming	1:6465a3f5c58a	621	if (ucp - start_ucp != *lenp) {
sunyiming	1:6465a3f5c58a	622	/* this should never happen, because peer_mtu should be 1500 */
sunyiming	1:6465a3f5c58a	623	LCPDEBUG(LOG_ERR, ("Bug in lcp_addci: wrong length\n"));
sunyiming	1:6465a3f5c58a	624	}
sunyiming	1:6465a3f5c58a	625	}
sunyiming	1:6465a3f5c58a	626
sunyiming	1:6465a3f5c58a	627
sunyiming	1:6465a3f5c58a	628	/*
sunyiming	1:6465a3f5c58a	629	* lcp_ackci - Ack our CIs.
sunyiming	1:6465a3f5c58a	630	* This should not modify any state if the Ack is bad.
sunyiming	1:6465a3f5c58a	631	*
sunyiming	1:6465a3f5c58a	632	* Returns:
sunyiming	1:6465a3f5c58a	633	* 0 - Ack was bad.
sunyiming	1:6465a3f5c58a	634	* 1 - Ack was good.
sunyiming	1:6465a3f5c58a	635	*/
sunyiming	1:6465a3f5c58a	636	static int
sunyiming	1:6465a3f5c58a	637	lcp_ackci(fsm f, u_char p, int len)
sunyiming	1:6465a3f5c58a	638	{
sunyiming	1:6465a3f5c58a	639	lcp_options *go = &lcp_gotoptions[f->unit];
sunyiming	1:6465a3f5c58a	640	u_char cilen, citype, cichar;
sunyiming	1:6465a3f5c58a	641	u_short cishort;
sunyiming	1:6465a3f5c58a	642	u32_t cilong;
sunyiming	1:6465a3f5c58a	643
sunyiming	1:6465a3f5c58a	644	/*
sunyiming	1:6465a3f5c58a	645	* CIs must be in exactly the same order that we sent.
sunyiming	1:6465a3f5c58a	646	* Check packet length and CI length at each step.
sunyiming	1:6465a3f5c58a	647	* If we find any deviations, then this packet is bad.
sunyiming	1:6465a3f5c58a	648	*/
sunyiming	1:6465a3f5c58a	649	#define ACKCIVOID(opt, neg) \
sunyiming	1:6465a3f5c58a	650	if (neg) { \
sunyiming	1:6465a3f5c58a	651	if ((len -= CILEN_VOID) < 0) \
sunyiming	1:6465a3f5c58a	652	goto bad; \
sunyiming	1:6465a3f5c58a	653	GETCHAR(citype, p); \
sunyiming	1:6465a3f5c58a	654	GETCHAR(cilen, p); \
sunyiming	1:6465a3f5c58a	655	if (cilen != CILEN_VOID \|\| citype != opt) \
sunyiming	1:6465a3f5c58a	656	goto bad; \
sunyiming	1:6465a3f5c58a	657	}
sunyiming	1:6465a3f5c58a	658	#define ACKCISHORT(opt, neg, val) \
sunyiming	1:6465a3f5c58a	659	if (neg) { \
sunyiming	1:6465a3f5c58a	660	if ((len -= CILEN_SHORT) < 0) \
sunyiming	1:6465a3f5c58a	661	goto bad; \
sunyiming	1:6465a3f5c58a	662	GETCHAR(citype, p); \
sunyiming	1:6465a3f5c58a	663	GETCHAR(cilen, p); \
sunyiming	1:6465a3f5c58a	664	if (cilen != CILEN_SHORT \|\| citype != opt) \
sunyiming	1:6465a3f5c58a	665	goto bad; \
sunyiming	1:6465a3f5c58a	666	GETSHORT(cishort, p); \
sunyiming	1:6465a3f5c58a	667	if (cishort != val) \
sunyiming	1:6465a3f5c58a	668	goto bad; \
sunyiming	1:6465a3f5c58a	669	}
sunyiming	1:6465a3f5c58a	670	#define ACKCICHAR(opt, neg, val) \
sunyiming	1:6465a3f5c58a	671	if (neg) { \
sunyiming	1:6465a3f5c58a	672	if ((len -= CILEN_CHAR) < 0) \
sunyiming	1:6465a3f5c58a	673	goto bad; \
sunyiming	1:6465a3f5c58a	674	GETCHAR(citype, p); \
sunyiming	1:6465a3f5c58a	675	GETCHAR(cilen, p); \
sunyiming	1:6465a3f5c58a	676	if (cilen != CILEN_CHAR \|\| citype != opt) \
sunyiming	1:6465a3f5c58a	677	goto bad; \
sunyiming	1:6465a3f5c58a	678	GETCHAR(cichar, p); \
sunyiming	1:6465a3f5c58a	679	if (cichar != val) \
sunyiming	1:6465a3f5c58a	680	goto bad; \
sunyiming	1:6465a3f5c58a	681	}
sunyiming	1:6465a3f5c58a	682	#define ACKCICHAP(opt, neg, val, digest) \
sunyiming	1:6465a3f5c58a	683	if (neg) { \
sunyiming	1:6465a3f5c58a	684	if ((len -= CILEN_CHAP) < 0) \
sunyiming	1:6465a3f5c58a	685	goto bad; \
sunyiming	1:6465a3f5c58a	686	GETCHAR(citype, p); \
sunyiming	1:6465a3f5c58a	687	GETCHAR(cilen, p); \
sunyiming	1:6465a3f5c58a	688	if (cilen != CILEN_CHAP \|\| citype != opt) \
sunyiming	1:6465a3f5c58a	689	goto bad; \
sunyiming	1:6465a3f5c58a	690	GETSHORT(cishort, p); \
sunyiming	1:6465a3f5c58a	691	if (cishort != val) \
sunyiming	1:6465a3f5c58a	692	goto bad; \
sunyiming	1:6465a3f5c58a	693	GETCHAR(cichar, p); \
sunyiming	1:6465a3f5c58a	694	if (cichar != digest) \
sunyiming	1:6465a3f5c58a	695	goto bad; \
sunyiming	1:6465a3f5c58a	696	}
sunyiming	1:6465a3f5c58a	697	#define ACKCILONG(opt, neg, val) \
sunyiming	1:6465a3f5c58a	698	if (neg) { \
sunyiming	1:6465a3f5c58a	699	if ((len -= CILEN_LONG) < 0) \
sunyiming	1:6465a3f5c58a	700	goto bad; \
sunyiming	1:6465a3f5c58a	701	GETCHAR(citype, p); \
sunyiming	1:6465a3f5c58a	702	GETCHAR(cilen, p); \
sunyiming	1:6465a3f5c58a	703	if (cilen != CILEN_LONG \|\| citype != opt) \
sunyiming	1:6465a3f5c58a	704	goto bad; \
sunyiming	1:6465a3f5c58a	705	GETLONG(cilong, p); \
sunyiming	1:6465a3f5c58a	706	if (cilong != val) \
sunyiming	1:6465a3f5c58a	707	goto bad; \
sunyiming	1:6465a3f5c58a	708	}
sunyiming	1:6465a3f5c58a	709	#define ACKCILQR(opt, neg, val) \
sunyiming	1:6465a3f5c58a	710	if (neg) { \
sunyiming	1:6465a3f5c58a	711	if ((len -= CILEN_LQR) < 0) \
sunyiming	1:6465a3f5c58a	712	goto bad; \
sunyiming	1:6465a3f5c58a	713	GETCHAR(citype, p); \
sunyiming	1:6465a3f5c58a	714	GETCHAR(cilen, p); \
sunyiming	1:6465a3f5c58a	715	if (cilen != CILEN_LQR \|\| citype != opt) \
sunyiming	1:6465a3f5c58a	716	goto bad; \
sunyiming	1:6465a3f5c58a	717	GETSHORT(cishort, p); \
sunyiming	1:6465a3f5c58a	718	if (cishort != PPP_LQR) \
sunyiming	1:6465a3f5c58a	719	goto bad; \
sunyiming	1:6465a3f5c58a	720	GETLONG(cilong, p); \
sunyiming	1:6465a3f5c58a	721	if (cilong != val) \
sunyiming	1:6465a3f5c58a	722	goto bad; \
sunyiming	1:6465a3f5c58a	723	}
sunyiming	1:6465a3f5c58a	724
sunyiming	1:6465a3f5c58a	725	ACKCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
sunyiming	1:6465a3f5c58a	726	ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
sunyiming	1:6465a3f5c58a	727	ACKCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
sunyiming	1:6465a3f5c58a	728	ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
sunyiming	1:6465a3f5c58a	729	ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
sunyiming	1:6465a3f5c58a	730	ACKCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
sunyiming	1:6465a3f5c58a	731	ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
sunyiming	1:6465a3f5c58a	732	ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
sunyiming	1:6465a3f5c58a	733	ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
sunyiming	1:6465a3f5c58a	734
sunyiming	1:6465a3f5c58a	735	/*
sunyiming	1:6465a3f5c58a	736	* If there are any remaining CIs, then this packet is bad.
sunyiming	1:6465a3f5c58a	737	*/
sunyiming	1:6465a3f5c58a	738	if (len != 0) {
sunyiming	1:6465a3f5c58a	739	goto bad;
sunyiming	1:6465a3f5c58a	740	}
sunyiming	1:6465a3f5c58a	741	LCPDEBUG(LOG_INFO, ("lcp_acki: Ack\n"));
sunyiming	1:6465a3f5c58a	742	return (1);
sunyiming	1:6465a3f5c58a	743	bad:
sunyiming	1:6465a3f5c58a	744	LCPDEBUG(LOG_WARNING, ("lcp_acki: received bad Ack!\n"));
sunyiming	1:6465a3f5c58a	745	return (0);
sunyiming	1:6465a3f5c58a	746	}
sunyiming	1:6465a3f5c58a	747
sunyiming	1:6465a3f5c58a	748
sunyiming	1:6465a3f5c58a	749	/*
sunyiming	1:6465a3f5c58a	750	* lcp_nakci - Peer has sent a NAK for some of our CIs.
sunyiming	1:6465a3f5c58a	751	* This should not modify any state if the Nak is bad
sunyiming	1:6465a3f5c58a	752	* or if LCP is in the LS_OPENED state.
sunyiming	1:6465a3f5c58a	753	*
sunyiming	1:6465a3f5c58a	754	* Returns:
sunyiming	1:6465a3f5c58a	755	* 0 - Nak was bad.
sunyiming	1:6465a3f5c58a	756	* 1 - Nak was good.
sunyiming	1:6465a3f5c58a	757	*/
sunyiming	1:6465a3f5c58a	758	static int
sunyiming	1:6465a3f5c58a	759	lcp_nakci(fsm f, u_char p, int len)
sunyiming	1:6465a3f5c58a	760	{
sunyiming	1:6465a3f5c58a	761	lcp_options *go = &lcp_gotoptions[f->unit];
sunyiming	1:6465a3f5c58a	762	lcp_options *wo = &lcp_wantoptions[f->unit];
sunyiming	1:6465a3f5c58a	763	u_char citype, cichar, *next;
sunyiming	1:6465a3f5c58a	764	u_short cishort;
sunyiming	1:6465a3f5c58a	765	u32_t cilong;
sunyiming	1:6465a3f5c58a	766	lcp_options no; /* options we've seen Naks for */
sunyiming	1:6465a3f5c58a	767	lcp_options try; /* options to request next time */
sunyiming	1:6465a3f5c58a	768	int looped_back = 0;
sunyiming	1:6465a3f5c58a	769	int cilen;
sunyiming	1:6465a3f5c58a	770
sunyiming	1:6465a3f5c58a	771	BZERO(&no, sizeof(no));
sunyiming	1:6465a3f5c58a	772	try = *go;
sunyiming	1:6465a3f5c58a	773
sunyiming	1:6465a3f5c58a	774	/*
sunyiming	1:6465a3f5c58a	775	* Any Nak'd CIs must be in exactly the same order that we sent.
sunyiming	1:6465a3f5c58a	776	* Check packet length and CI length at each step.
sunyiming	1:6465a3f5c58a	777	* If we find any deviations, then this packet is bad.
sunyiming	1:6465a3f5c58a	778	*/
sunyiming	1:6465a3f5c58a	779	#define NAKCIVOID(opt, neg, code) \
sunyiming	1:6465a3f5c58a	780	if (go->neg && \
sunyiming	1:6465a3f5c58a	781	len >= CILEN_VOID && \
sunyiming	1:6465a3f5c58a	782	p[1] == CILEN_VOID && \
sunyiming	1:6465a3f5c58a	783	p[0] == opt) { \
sunyiming	1:6465a3f5c58a	784	len -= CILEN_VOID; \
sunyiming	1:6465a3f5c58a	785	INCPTR(CILEN_VOID, p); \
sunyiming	1:6465a3f5c58a	786	no.neg = 1; \
sunyiming	1:6465a3f5c58a	787	code \
sunyiming	1:6465a3f5c58a	788	}
sunyiming	1:6465a3f5c58a	789	#define NAKCICHAP(opt, neg, code) \
sunyiming	1:6465a3f5c58a	790	if (go->neg && \
sunyiming	1:6465a3f5c58a	791	len >= CILEN_CHAP && \
sunyiming	1:6465a3f5c58a	792	p[1] == CILEN_CHAP && \
sunyiming	1:6465a3f5c58a	793	p[0] == opt) { \
sunyiming	1:6465a3f5c58a	794	len -= CILEN_CHAP; \
sunyiming	1:6465a3f5c58a	795	INCPTR(2, p); \
sunyiming	1:6465a3f5c58a	796	GETSHORT(cishort, p); \
sunyiming	1:6465a3f5c58a	797	GETCHAR(cichar, p); \
sunyiming	1:6465a3f5c58a	798	no.neg = 1; \
sunyiming	1:6465a3f5c58a	799	code \
sunyiming	1:6465a3f5c58a	800	}
sunyiming	1:6465a3f5c58a	801	#define NAKCICHAR(opt, neg, code) \
sunyiming	1:6465a3f5c58a	802	if (go->neg && \
sunyiming	1:6465a3f5c58a	803	len >= CILEN_CHAR && \
sunyiming	1:6465a3f5c58a	804	p[1] == CILEN_CHAR && \
sunyiming	1:6465a3f5c58a	805	p[0] == opt) { \
sunyiming	1:6465a3f5c58a	806	len -= CILEN_CHAR; \
sunyiming	1:6465a3f5c58a	807	INCPTR(2, p); \
sunyiming	1:6465a3f5c58a	808	GETCHAR(cichar, p); \
sunyiming	1:6465a3f5c58a	809	no.neg = 1; \
sunyiming	1:6465a3f5c58a	810	code \
sunyiming	1:6465a3f5c58a	811	}
sunyiming	1:6465a3f5c58a	812	#define NAKCISHORT(opt, neg, code) \
sunyiming	1:6465a3f5c58a	813	if (go->neg && \
sunyiming	1:6465a3f5c58a	814	len >= CILEN_SHORT && \
sunyiming	1:6465a3f5c58a	815	p[1] == CILEN_SHORT && \
sunyiming	1:6465a3f5c58a	816	p[0] == opt) { \
sunyiming	1:6465a3f5c58a	817	len -= CILEN_SHORT; \
sunyiming	1:6465a3f5c58a	818	INCPTR(2, p); \
sunyiming	1:6465a3f5c58a	819	GETSHORT(cishort, p); \
sunyiming	1:6465a3f5c58a	820	no.neg = 1; \
sunyiming	1:6465a3f5c58a	821	code \
sunyiming	1:6465a3f5c58a	822	}
sunyiming	1:6465a3f5c58a	823	#define NAKCILONG(opt, neg, code) \
sunyiming	1:6465a3f5c58a	824	if (go->neg && \
sunyiming	1:6465a3f5c58a	825	len >= CILEN_LONG && \
sunyiming	1:6465a3f5c58a	826	p[1] == CILEN_LONG && \
sunyiming	1:6465a3f5c58a	827	p[0] == opt) { \
sunyiming	1:6465a3f5c58a	828	len -= CILEN_LONG; \
sunyiming	1:6465a3f5c58a	829	INCPTR(2, p); \
sunyiming	1:6465a3f5c58a	830	GETLONG(cilong, p); \
sunyiming	1:6465a3f5c58a	831	no.neg = 1; \
sunyiming	1:6465a3f5c58a	832	code \
sunyiming	1:6465a3f5c58a	833	}
sunyiming	1:6465a3f5c58a	834	#define NAKCILQR(opt, neg, code) \
sunyiming	1:6465a3f5c58a	835	if (go->neg && \
sunyiming	1:6465a3f5c58a	836	len >= CILEN_LQR && \
sunyiming	1:6465a3f5c58a	837	p[1] == CILEN_LQR && \
sunyiming	1:6465a3f5c58a	838	p[0] == opt) { \
sunyiming	1:6465a3f5c58a	839	len -= CILEN_LQR; \
sunyiming	1:6465a3f5c58a	840	INCPTR(2, p); \
sunyiming	1:6465a3f5c58a	841	GETSHORT(cishort, p); \
sunyiming	1:6465a3f5c58a	842	GETLONG(cilong, p); \
sunyiming	1:6465a3f5c58a	843	no.neg = 1; \
sunyiming	1:6465a3f5c58a	844	code \
sunyiming	1:6465a3f5c58a	845	}
sunyiming	1:6465a3f5c58a	846
sunyiming	1:6465a3f5c58a	847	/*
sunyiming	1:6465a3f5c58a	848	* We don't care if they want to send us smaller packets than
sunyiming	1:6465a3f5c58a	849	* we want. Therefore, accept any MRU less than what we asked for,
sunyiming	1:6465a3f5c58a	850	* but then ignore the new value when setting the MRU in the kernel.
sunyiming	1:6465a3f5c58a	851	* If they send us a bigger MRU than what we asked, accept it, up to
sunyiming	1:6465a3f5c58a	852	* the limit of the default MRU we'd get if we didn't negotiate.
sunyiming	1:6465a3f5c58a	853	*/
sunyiming	1:6465a3f5c58a	854	if (go->neg_mru && go->mru != PPP_DEFMRU) {
sunyiming	1:6465a3f5c58a	855	NAKCISHORT(CI_MRU, neg_mru,
sunyiming	1:6465a3f5c58a	856	if (cishort <= wo->mru \|\| cishort < PPP_DEFMRU) {
sunyiming	1:6465a3f5c58a	857	try.mru = cishort;
sunyiming	1:6465a3f5c58a	858	}
sunyiming	1:6465a3f5c58a	859	);
sunyiming	1:6465a3f5c58a	860	}
sunyiming	1:6465a3f5c58a	861
sunyiming	1:6465a3f5c58a	862	/*
sunyiming	1:6465a3f5c58a	863	* Add any characters they want to our (receive-side) asyncmap.
sunyiming	1:6465a3f5c58a	864	*/
sunyiming	1:6465a3f5c58a	865	if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) {
sunyiming	1:6465a3f5c58a	866	NAKCILONG(CI_ASYNCMAP, neg_asyncmap,
sunyiming	1:6465a3f5c58a	867	try.asyncmap = go->asyncmap \| cilong;
sunyiming	1:6465a3f5c58a	868	);
sunyiming	1:6465a3f5c58a	869	}
sunyiming	1:6465a3f5c58a	870
sunyiming	1:6465a3f5c58a	871	/*
sunyiming	1:6465a3f5c58a	872	* If they've nak'd our authentication-protocol, check whether
sunyiming	1:6465a3f5c58a	873	* they are proposing a different protocol, or a different
sunyiming	1:6465a3f5c58a	874	* hash algorithm for CHAP.
sunyiming	1:6465a3f5c58a	875	*/
sunyiming	1:6465a3f5c58a	876	if ((go->neg_chap \|\| go->neg_upap)
sunyiming	1:6465a3f5c58a	877	&& len >= CILEN_SHORT
sunyiming	1:6465a3f5c58a	878	&& p[0] == CI_AUTHTYPE && p[1] >= CILEN_SHORT && p[1] <= len) {
sunyiming	1:6465a3f5c58a	879	cilen = p[1];
sunyiming	1:6465a3f5c58a	880	len -= cilen;
sunyiming	1:6465a3f5c58a	881	no.neg_chap = go->neg_chap;
sunyiming	1:6465a3f5c58a	882	no.neg_upap = go->neg_upap;
sunyiming	1:6465a3f5c58a	883	INCPTR(2, p);
sunyiming	1:6465a3f5c58a	884	GETSHORT(cishort, p);
sunyiming	1:6465a3f5c58a	885	if (cishort == PPP_PAP && cilen == CILEN_SHORT) {
sunyiming	1:6465a3f5c58a	886	/*
sunyiming	1:6465a3f5c58a	887	* If we were asking for CHAP, they obviously don't want to do it.
sunyiming	1:6465a3f5c58a	888	* If we weren't asking for CHAP, then we were asking for PAP,
sunyiming	1:6465a3f5c58a	889	* in which case this Nak is bad.
sunyiming	1:6465a3f5c58a	890	*/
sunyiming	1:6465a3f5c58a	891	if (!go->neg_chap) {
sunyiming	1:6465a3f5c58a	892	goto bad;
sunyiming	1:6465a3f5c58a	893	}
sunyiming	1:6465a3f5c58a	894	try.neg_chap = 0;
sunyiming	1:6465a3f5c58a	895
sunyiming	1:6465a3f5c58a	896	} else if (cishort == PPP_CHAP && cilen == CILEN_CHAP) {
sunyiming	1:6465a3f5c58a	897	GETCHAR(cichar, p);
sunyiming	1:6465a3f5c58a	898	if (go->neg_chap) {
sunyiming	1:6465a3f5c58a	899	/*
sunyiming	1:6465a3f5c58a	900	* We were asking for CHAP/MD5; they must want a different
sunyiming	1:6465a3f5c58a	901	* algorithm. If they can't do MD5, we'll have to stop
sunyiming	1:6465a3f5c58a	902	* asking for CHAP.
sunyiming	1:6465a3f5c58a	903	*/
sunyiming	1:6465a3f5c58a	904	if (cichar != go->chap_mdtype) {
sunyiming	1:6465a3f5c58a	905	try.neg_chap = 0;
sunyiming	1:6465a3f5c58a	906	}
sunyiming	1:6465a3f5c58a	907	} else {
sunyiming	1:6465a3f5c58a	908	/*
sunyiming	1:6465a3f5c58a	909	* Stop asking for PAP if we were asking for it.
sunyiming	1:6465a3f5c58a	910	*/
sunyiming	1:6465a3f5c58a	911	try.neg_upap = 0;
sunyiming	1:6465a3f5c58a	912	}
sunyiming	1:6465a3f5c58a	913
sunyiming	1:6465a3f5c58a	914	} else {
sunyiming	1:6465a3f5c58a	915	/*
sunyiming	1:6465a3f5c58a	916	* We don't recognize what they're suggesting.
sunyiming	1:6465a3f5c58a	917	* Stop asking for what we were asking for.
sunyiming	1:6465a3f5c58a	918	*/
sunyiming	1:6465a3f5c58a	919	if (go->neg_chap) {
sunyiming	1:6465a3f5c58a	920	try.neg_chap = 0;
sunyiming	1:6465a3f5c58a	921	} else {
sunyiming	1:6465a3f5c58a	922	try.neg_upap = 0;
sunyiming	1:6465a3f5c58a	923	}
sunyiming	1:6465a3f5c58a	924	p += cilen - CILEN_SHORT;
sunyiming	1:6465a3f5c58a	925	}
sunyiming	1:6465a3f5c58a	926	}
sunyiming	1:6465a3f5c58a	927
sunyiming	1:6465a3f5c58a	928	/*
sunyiming	1:6465a3f5c58a	929	* If they can't cope with our link quality protocol, we'll have
sunyiming	1:6465a3f5c58a	930	* to stop asking for LQR. We haven't got any other protocol.
sunyiming	1:6465a3f5c58a	931	* If they Nak the reporting period, take their value XXX ?
sunyiming	1:6465a3f5c58a	932	*/
sunyiming	1:6465a3f5c58a	933	NAKCILQR(CI_QUALITY, neg_lqr,
sunyiming	1:6465a3f5c58a	934	if (cishort != PPP_LQR) {
sunyiming	1:6465a3f5c58a	935	try.neg_lqr = 0;
sunyiming	1:6465a3f5c58a	936	} else {
sunyiming	1:6465a3f5c58a	937	try.lqr_period = cilong;
sunyiming	1:6465a3f5c58a	938	}
sunyiming	1:6465a3f5c58a	939	);
sunyiming	1:6465a3f5c58a	940
sunyiming	1:6465a3f5c58a	941	/*
sunyiming	1:6465a3f5c58a	942	* Only implementing CBCP...not the rest of the callback options
sunyiming	1:6465a3f5c58a	943	*/
sunyiming	1:6465a3f5c58a	944	NAKCICHAR(CI_CALLBACK, neg_cbcp,
sunyiming	1:6465a3f5c58a	945	try.neg_cbcp = 0;
sunyiming	1:6465a3f5c58a	946	);
sunyiming	1:6465a3f5c58a	947
sunyiming	1:6465a3f5c58a	948	/*
sunyiming	1:6465a3f5c58a	949	* Check for a looped-back line.
sunyiming	1:6465a3f5c58a	950	*/
sunyiming	1:6465a3f5c58a	951	NAKCILONG(CI_MAGICNUMBER, neg_magicnumber,
sunyiming	1:6465a3f5c58a	952	try.magicnumber = magic();
sunyiming	1:6465a3f5c58a	953	looped_back = 1;
sunyiming	1:6465a3f5c58a	954	);
sunyiming	1:6465a3f5c58a	955
sunyiming	1:6465a3f5c58a	956	/*
sunyiming	1:6465a3f5c58a	957	* Peer shouldn't send Nak for protocol compression or
sunyiming	1:6465a3f5c58a	958	* address/control compression requests; they should send
sunyiming	1:6465a3f5c58a	959	* a Reject instead. If they send a Nak, treat it as a Reject.
sunyiming	1:6465a3f5c58a	960	*/
sunyiming	1:6465a3f5c58a	961	NAKCIVOID(CI_PCOMPRESSION, neg_pcompression,
sunyiming	1:6465a3f5c58a	962	try.neg_pcompression = 0;
sunyiming	1:6465a3f5c58a	963	);
sunyiming	1:6465a3f5c58a	964	NAKCIVOID(CI_ACCOMPRESSION, neg_accompression,
sunyiming	1:6465a3f5c58a	965	try.neg_accompression = 0;
sunyiming	1:6465a3f5c58a	966	);
sunyiming	1:6465a3f5c58a	967
sunyiming	1:6465a3f5c58a	968	/*
sunyiming	1:6465a3f5c58a	969	* There may be remaining CIs, if the peer is requesting negotiation
sunyiming	1:6465a3f5c58a	970	* on an option that we didn't include in our request packet.
sunyiming	1:6465a3f5c58a	971	* If we see an option that we requested, or one we've already seen
sunyiming	1:6465a3f5c58a	972	* in this packet, then this packet is bad.
sunyiming	1:6465a3f5c58a	973	* If we wanted to respond by starting to negotiate on the requested
sunyiming	1:6465a3f5c58a	974	* option(s), we could, but we don't, because except for the
sunyiming	1:6465a3f5c58a	975	* authentication type and quality protocol, if we are not negotiating
sunyiming	1:6465a3f5c58a	976	* an option, it is because we were told not to.
sunyiming	1:6465a3f5c58a	977	* For the authentication type, the Nak from the peer means
sunyiming	1:6465a3f5c58a	978	* `let me authenticate myself with you' which is a bit pointless.
sunyiming	1:6465a3f5c58a	979	* For the quality protocol, the Nak means `ask me to send you quality
sunyiming	1:6465a3f5c58a	980	* reports', but if we didn't ask for them, we don't want them.
sunyiming	1:6465a3f5c58a	981	* An option we don't recognize represents the peer asking to
sunyiming	1:6465a3f5c58a	982	* negotiate some option we don't support, so ignore it.
sunyiming	1:6465a3f5c58a	983	*/
sunyiming	1:6465a3f5c58a	984	while (len > CILEN_VOID) {
sunyiming	1:6465a3f5c58a	985	GETCHAR(citype, p);
sunyiming	1:6465a3f5c58a	986	GETCHAR(cilen, p);
sunyiming	1:6465a3f5c58a	987	if (cilen < CILEN_VOID \|\| (len -= cilen) < 0) {
sunyiming	1:6465a3f5c58a	988	goto bad;
sunyiming	1:6465a3f5c58a	989	}
sunyiming	1:6465a3f5c58a	990	next = p + cilen - 2;
sunyiming	1:6465a3f5c58a	991
sunyiming	1:6465a3f5c58a	992	switch (citype) {
sunyiming	1:6465a3f5c58a	993	case CI_MRU:
sunyiming	1:6465a3f5c58a	994	if ((go->neg_mru && go->mru != PPP_DEFMRU)
sunyiming	1:6465a3f5c58a	995	\|\| no.neg_mru \|\| cilen != CILEN_SHORT) {
sunyiming	1:6465a3f5c58a	996	goto bad;
sunyiming	1:6465a3f5c58a	997	}
sunyiming	1:6465a3f5c58a	998	GETSHORT(cishort, p);
sunyiming	1:6465a3f5c58a	999	if (cishort < PPP_DEFMRU) {
sunyiming	1:6465a3f5c58a	1000	try.mru = cishort;
sunyiming	1:6465a3f5c58a	1001	}
sunyiming	1:6465a3f5c58a	1002	break;
sunyiming	1:6465a3f5c58a	1003	case CI_ASYNCMAP:
sunyiming	1:6465a3f5c58a	1004	if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl)
sunyiming	1:6465a3f5c58a	1005	\|\| no.neg_asyncmap \|\| cilen != CILEN_LONG) {
sunyiming	1:6465a3f5c58a	1006	goto bad;
sunyiming	1:6465a3f5c58a	1007	}
sunyiming	1:6465a3f5c58a	1008	break;
sunyiming	1:6465a3f5c58a	1009	case CI_AUTHTYPE:
sunyiming	1:6465a3f5c58a	1010	if (go->neg_chap \|\| no.neg_chap \|\| go->neg_upap \|\| no.neg_upap) {
sunyiming	1:6465a3f5c58a	1011	goto bad;
sunyiming	1:6465a3f5c58a	1012	}
sunyiming	1:6465a3f5c58a	1013	break;
sunyiming	1:6465a3f5c58a	1014	case CI_MAGICNUMBER:
sunyiming	1:6465a3f5c58a	1015	if (go->neg_magicnumber \|\| no.neg_magicnumber \|\|
sunyiming	1:6465a3f5c58a	1016	cilen != CILEN_LONG) {
sunyiming	1:6465a3f5c58a	1017	goto bad;
sunyiming	1:6465a3f5c58a	1018	}
sunyiming	1:6465a3f5c58a	1019	break;
sunyiming	1:6465a3f5c58a	1020	case CI_PCOMPRESSION:
sunyiming	1:6465a3f5c58a	1021	if (go->neg_pcompression \|\| no.neg_pcompression
sunyiming	1:6465a3f5c58a	1022	\|\| cilen != CILEN_VOID) {
sunyiming	1:6465a3f5c58a	1023	goto bad;
sunyiming	1:6465a3f5c58a	1024	}
sunyiming	1:6465a3f5c58a	1025	break;
sunyiming	1:6465a3f5c58a	1026	case CI_ACCOMPRESSION:
sunyiming	1:6465a3f5c58a	1027	if (go->neg_accompression \|\| no.neg_accompression
sunyiming	1:6465a3f5c58a	1028	\|\| cilen != CILEN_VOID) {
sunyiming	1:6465a3f5c58a	1029	goto bad;
sunyiming	1:6465a3f5c58a	1030	}
sunyiming	1:6465a3f5c58a	1031	break;
sunyiming	1:6465a3f5c58a	1032	case CI_QUALITY:
sunyiming	1:6465a3f5c58a	1033	if (go->neg_lqr \|\| no.neg_lqr \|\| cilen != CILEN_LQR) {
sunyiming	1:6465a3f5c58a	1034	goto bad;
sunyiming	1:6465a3f5c58a	1035	}
sunyiming	1:6465a3f5c58a	1036	break;
sunyiming	1:6465a3f5c58a	1037	}
sunyiming	1:6465a3f5c58a	1038	p = next;
sunyiming	1:6465a3f5c58a	1039	}
sunyiming	1:6465a3f5c58a	1040
sunyiming	1:6465a3f5c58a	1041	/* If there is still anything left, this packet is bad. */
sunyiming	1:6465a3f5c58a	1042	if (len != 0) {
sunyiming	1:6465a3f5c58a	1043	goto bad;
sunyiming	1:6465a3f5c58a	1044	}
sunyiming	1:6465a3f5c58a	1045
sunyiming	1:6465a3f5c58a	1046	/*
sunyiming	1:6465a3f5c58a	1047	* OK, the Nak is good. Now we can update state.
sunyiming	1:6465a3f5c58a	1048	*/
sunyiming	1:6465a3f5c58a	1049	if (f->state != LS_OPENED) {
sunyiming	1:6465a3f5c58a	1050	if (looped_back) {
sunyiming	1:6465a3f5c58a	1051	if (++try.numloops >= lcp_loopbackfail) {
sunyiming	1:6465a3f5c58a	1052	LCPDEBUG(LOG_NOTICE, ("Serial line is looped back.\n"));
sunyiming	1:6465a3f5c58a	1053	lcp_close(f->unit, "Loopback detected");
sunyiming	1:6465a3f5c58a	1054	}
sunyiming	1:6465a3f5c58a	1055	} else {
sunyiming	1:6465a3f5c58a	1056	try.numloops = 0;
sunyiming	1:6465a3f5c58a	1057	}
sunyiming	1:6465a3f5c58a	1058	*go = try;
sunyiming	1:6465a3f5c58a	1059	}
sunyiming	1:6465a3f5c58a	1060
sunyiming	1:6465a3f5c58a	1061	return 1;
sunyiming	1:6465a3f5c58a	1062
sunyiming	1:6465a3f5c58a	1063	bad:
sunyiming	1:6465a3f5c58a	1064	LCPDEBUG(LOG_WARNING, ("lcp_nakci: received bad Nak!\n"));
sunyiming	1:6465a3f5c58a	1065	return 0;
sunyiming	1:6465a3f5c58a	1066	}
sunyiming	1:6465a3f5c58a	1067
sunyiming	1:6465a3f5c58a	1068
sunyiming	1:6465a3f5c58a	1069	/*
sunyiming	1:6465a3f5c58a	1070	* lcp_rejci - Peer has Rejected some of our CIs.
sunyiming	1:6465a3f5c58a	1071	* This should not modify any state if the Reject is bad
sunyiming	1:6465a3f5c58a	1072	* or if LCP is in the LS_OPENED state.
sunyiming	1:6465a3f5c58a	1073	*
sunyiming	1:6465a3f5c58a	1074	* Returns:
sunyiming	1:6465a3f5c58a	1075	* 0 - Reject was bad.
sunyiming	1:6465a3f5c58a	1076	* 1 - Reject was good.
sunyiming	1:6465a3f5c58a	1077	*/
sunyiming	1:6465a3f5c58a	1078	static int
sunyiming	1:6465a3f5c58a	1079	lcp_rejci(fsm f, u_char p, int len)
sunyiming	1:6465a3f5c58a	1080	{
sunyiming	1:6465a3f5c58a	1081	lcp_options *go = &lcp_gotoptions[f->unit];
sunyiming	1:6465a3f5c58a	1082	u_char cichar;
sunyiming	1:6465a3f5c58a	1083	u_short cishort;
sunyiming	1:6465a3f5c58a	1084	u32_t cilong;
sunyiming	1:6465a3f5c58a	1085	lcp_options try; /* options to request next time */
sunyiming	1:6465a3f5c58a	1086
sunyiming	1:6465a3f5c58a	1087	try = *go;
sunyiming	1:6465a3f5c58a	1088
sunyiming	1:6465a3f5c58a	1089	/*
sunyiming	1:6465a3f5c58a	1090	* Any Rejected CIs must be in exactly the same order that we sent.
sunyiming	1:6465a3f5c58a	1091	* Check packet length and CI length at each step.
sunyiming	1:6465a3f5c58a	1092	* If we find any deviations, then this packet is bad.
sunyiming	1:6465a3f5c58a	1093	*/
sunyiming	1:6465a3f5c58a	1094	#define REJCIVOID(opt, neg) \
sunyiming	1:6465a3f5c58a	1095	if (go->neg && \
sunyiming	1:6465a3f5c58a	1096	len >= CILEN_VOID && \
sunyiming	1:6465a3f5c58a	1097	p[1] == CILEN_VOID && \
sunyiming	1:6465a3f5c58a	1098	p[0] == opt) { \
sunyiming	1:6465a3f5c58a	1099	len -= CILEN_VOID; \
sunyiming	1:6465a3f5c58a	1100	INCPTR(CILEN_VOID, p); \
sunyiming	1:6465a3f5c58a	1101	try.neg = 0; \
sunyiming	1:6465a3f5c58a	1102	LCPDEBUG(LOG_INFO, ("lcp_rejci: void opt %d rejected\n", opt)); \
sunyiming	1:6465a3f5c58a	1103	}
sunyiming	1:6465a3f5c58a	1104	#define REJCISHORT(opt, neg, val) \
sunyiming	1:6465a3f5c58a	1105	if (go->neg && \
sunyiming	1:6465a3f5c58a	1106	len >= CILEN_SHORT && \
sunyiming	1:6465a3f5c58a	1107	p[1] == CILEN_SHORT && \
sunyiming	1:6465a3f5c58a	1108	p[0] == opt) { \
sunyiming	1:6465a3f5c58a	1109	len -= CILEN_SHORT; \
sunyiming	1:6465a3f5c58a	1110	INCPTR(2, p); \
sunyiming	1:6465a3f5c58a	1111	GETSHORT(cishort, p); \
sunyiming	1:6465a3f5c58a	1112	/* Check rejected value. */ \
sunyiming	1:6465a3f5c58a	1113	if (cishort != val) { \
sunyiming	1:6465a3f5c58a	1114	goto bad; \
sunyiming	1:6465a3f5c58a	1115	} \
sunyiming	1:6465a3f5c58a	1116	try.neg = 0; \
sunyiming	1:6465a3f5c58a	1117	LCPDEBUG(LOG_INFO, ("lcp_rejci: short opt %d rejected\n", opt)); \
sunyiming	1:6465a3f5c58a	1118	}
sunyiming	1:6465a3f5c58a	1119	#define REJCICHAP(opt, neg, val, digest) \
sunyiming	1:6465a3f5c58a	1120	if (go->neg && \
sunyiming	1:6465a3f5c58a	1121	len >= CILEN_CHAP && \
sunyiming	1:6465a3f5c58a	1122	p[1] == CILEN_CHAP && \
sunyiming	1:6465a3f5c58a	1123	p[0] == opt) { \
sunyiming	1:6465a3f5c58a	1124	len -= CILEN_CHAP; \
sunyiming	1:6465a3f5c58a	1125	INCPTR(2, p); \
sunyiming	1:6465a3f5c58a	1126	GETSHORT(cishort, p); \
sunyiming	1:6465a3f5c58a	1127	GETCHAR(cichar, p); \
sunyiming	1:6465a3f5c58a	1128	/* Check rejected value. */ \
sunyiming	1:6465a3f5c58a	1129	if (cishort != val \|\| cichar != digest) { \
sunyiming	1:6465a3f5c58a	1130	goto bad; \
sunyiming	1:6465a3f5c58a	1131	} \
sunyiming	1:6465a3f5c58a	1132	try.neg = 0; \
sunyiming	1:6465a3f5c58a	1133	try.neg_upap = 0; \
sunyiming	1:6465a3f5c58a	1134	LCPDEBUG(LOG_INFO, ("lcp_rejci: chap opt %d rejected\n", opt)); \
sunyiming	1:6465a3f5c58a	1135	}
sunyiming	1:6465a3f5c58a	1136	#define REJCILONG(opt, neg, val) \
sunyiming	1:6465a3f5c58a	1137	if (go->neg && \
sunyiming	1:6465a3f5c58a	1138	len >= CILEN_LONG && \
sunyiming	1:6465a3f5c58a	1139	p[1] == CILEN_LONG && \
sunyiming	1:6465a3f5c58a	1140	p[0] == opt) { \
sunyiming	1:6465a3f5c58a	1141	len -= CILEN_LONG; \
sunyiming	1:6465a3f5c58a	1142	INCPTR(2, p); \
sunyiming	1:6465a3f5c58a	1143	GETLONG(cilong, p); \
sunyiming	1:6465a3f5c58a	1144	/* Check rejected value. */ \
sunyiming	1:6465a3f5c58a	1145	if (cilong != val) { \
sunyiming	1:6465a3f5c58a	1146	goto bad; \
sunyiming	1:6465a3f5c58a	1147	} \
sunyiming	1:6465a3f5c58a	1148	try.neg = 0; \
sunyiming	1:6465a3f5c58a	1149	LCPDEBUG(LOG_INFO, ("lcp_rejci: long opt %d rejected\n", opt)); \
sunyiming	1:6465a3f5c58a	1150	}
sunyiming	1:6465a3f5c58a	1151	#define REJCILQR(opt, neg, val) \
sunyiming	1:6465a3f5c58a	1152	if (go->neg && \
sunyiming	1:6465a3f5c58a	1153	len >= CILEN_LQR && \
sunyiming	1:6465a3f5c58a	1154	p[1] == CILEN_LQR && \
sunyiming	1:6465a3f5c58a	1155	p[0] == opt) { \
sunyiming	1:6465a3f5c58a	1156	len -= CILEN_LQR; \
sunyiming	1:6465a3f5c58a	1157	INCPTR(2, p); \
sunyiming	1:6465a3f5c58a	1158	GETSHORT(cishort, p); \
sunyiming	1:6465a3f5c58a	1159	GETLONG(cilong, p); \
sunyiming	1:6465a3f5c58a	1160	/* Check rejected value. */ \
sunyiming	1:6465a3f5c58a	1161	if (cishort != PPP_LQR \|\| cilong != val) { \
sunyiming	1:6465a3f5c58a	1162	goto bad; \
sunyiming	1:6465a3f5c58a	1163	} \
sunyiming	1:6465a3f5c58a	1164	try.neg = 0; \
sunyiming	1:6465a3f5c58a	1165	LCPDEBUG(LOG_INFO, ("lcp_rejci: LQR opt %d rejected\n", opt)); \
sunyiming	1:6465a3f5c58a	1166	}
sunyiming	1:6465a3f5c58a	1167	#define REJCICBCP(opt, neg, val) \
sunyiming	1:6465a3f5c58a	1168	if (go->neg && \
sunyiming	1:6465a3f5c58a	1169	len >= CILEN_CBCP && \
sunyiming	1:6465a3f5c58a	1170	p[1] == CILEN_CBCP && \
sunyiming	1:6465a3f5c58a	1171	p[0] == opt) { \
sunyiming	1:6465a3f5c58a	1172	len -= CILEN_CBCP; \
sunyiming	1:6465a3f5c58a	1173	INCPTR(2, p); \
sunyiming	1:6465a3f5c58a	1174	GETCHAR(cichar, p); \
sunyiming	1:6465a3f5c58a	1175	/* Check rejected value. */ \
sunyiming	1:6465a3f5c58a	1176	if (cichar != val) { \
sunyiming	1:6465a3f5c58a	1177	goto bad; \
sunyiming	1:6465a3f5c58a	1178	} \
sunyiming	1:6465a3f5c58a	1179	try.neg = 0; \
sunyiming	1:6465a3f5c58a	1180	LCPDEBUG(LOG_INFO, ("lcp_rejci: Callback opt %d rejected\n", opt)); \
sunyiming	1:6465a3f5c58a	1181	}
sunyiming	1:6465a3f5c58a	1182
sunyiming	1:6465a3f5c58a	1183	REJCISHORT(CI_MRU, neg_mru, go->mru);
sunyiming	1:6465a3f5c58a	1184	REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap);
sunyiming	1:6465a3f5c58a	1185	REJCICHAP(CI_AUTHTYPE, neg_chap, PPP_CHAP, go->chap_mdtype);
sunyiming	1:6465a3f5c58a	1186	if (!go->neg_chap) {
sunyiming	1:6465a3f5c58a	1187	REJCISHORT(CI_AUTHTYPE, neg_upap, PPP_PAP);
sunyiming	1:6465a3f5c58a	1188	}
sunyiming	1:6465a3f5c58a	1189	REJCILQR(CI_QUALITY, neg_lqr, go->lqr_period);
sunyiming	1:6465a3f5c58a	1190	REJCICBCP(CI_CALLBACK, neg_cbcp, CBCP_OPT);
sunyiming	1:6465a3f5c58a	1191	REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber);
sunyiming	1:6465a3f5c58a	1192	REJCIVOID(CI_PCOMPRESSION, neg_pcompression);
sunyiming	1:6465a3f5c58a	1193	REJCIVOID(CI_ACCOMPRESSION, neg_accompression);
sunyiming	1:6465a3f5c58a	1194
sunyiming	1:6465a3f5c58a	1195	/*
sunyiming	1:6465a3f5c58a	1196	* If there are any remaining CIs, then this packet is bad.
sunyiming	1:6465a3f5c58a	1197	*/
sunyiming	1:6465a3f5c58a	1198	if (len != 0) {
sunyiming	1:6465a3f5c58a	1199	goto bad;
sunyiming	1:6465a3f5c58a	1200	}
sunyiming	1:6465a3f5c58a	1201	/*
sunyiming	1:6465a3f5c58a	1202	* Now we can update state.
sunyiming	1:6465a3f5c58a	1203	*/
sunyiming	1:6465a3f5c58a	1204	if (f->state != LS_OPENED) {
sunyiming	1:6465a3f5c58a	1205	*go = try;
sunyiming	1:6465a3f5c58a	1206	}
sunyiming	1:6465a3f5c58a	1207	return 1;
sunyiming	1:6465a3f5c58a	1208
sunyiming	1:6465a3f5c58a	1209	bad:
sunyiming	1:6465a3f5c58a	1210	LCPDEBUG(LOG_WARNING, ("lcp_rejci: received bad Reject!\n"));
sunyiming	1:6465a3f5c58a	1211	return 0;
sunyiming	1:6465a3f5c58a	1212	}
sunyiming	1:6465a3f5c58a	1213
sunyiming	1:6465a3f5c58a	1214
sunyiming	1:6465a3f5c58a	1215	/*
sunyiming	1:6465a3f5c58a	1216	* lcp_reqci - Check the peer's requested CIs and send appropriate response.
sunyiming	1:6465a3f5c58a	1217	*
sunyiming	1:6465a3f5c58a	1218	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
sunyiming	1:6465a3f5c58a	1219	* appropriately. If reject_if_disagree is non-zero, doesn't return
sunyiming	1:6465a3f5c58a	1220	* CONFNAK; returns CONFREJ if it can't return CONFACK.
sunyiming	1:6465a3f5c58a	1221	*/
sunyiming	1:6465a3f5c58a	1222	static int
sunyiming	1:6465a3f5c58a	1223	lcp_reqci(fsm *f,
sunyiming	1:6465a3f5c58a	1224	u_char inp, / Requested CIs */
sunyiming	1:6465a3f5c58a	1225	int lenp, / Length of requested CIs */
sunyiming	1:6465a3f5c58a	1226	int reject_if_disagree)
sunyiming	1:6465a3f5c58a	1227	{
sunyiming	1:6465a3f5c58a	1228	lcp_options *go = &lcp_gotoptions[f->unit];
sunyiming	1:6465a3f5c58a	1229	lcp_options *ho = &lcp_hisoptions[f->unit];
sunyiming	1:6465a3f5c58a	1230	lcp_options *ao = &lcp_allowoptions[f->unit];
sunyiming	1:6465a3f5c58a	1231	u_char cip, next; /* Pointer to current and next CIs */
sunyiming	1:6465a3f5c58a	1232	int cilen, citype; /* Parsed len, type */
sunyiming	1:6465a3f5c58a	1233	u_char cichar; /* Parsed char value */
sunyiming	1:6465a3f5c58a	1234	u_short cishort; /* Parsed short value */
sunyiming	1:6465a3f5c58a	1235	u32_t cilong; /* Parse long value */
sunyiming	1:6465a3f5c58a	1236	int rc = CONFACK; /* Final packet return code */
sunyiming	1:6465a3f5c58a	1237	int orc; /* Individual option return code */
sunyiming	1:6465a3f5c58a	1238	u_char p; / Pointer to next char to parse */
sunyiming	1:6465a3f5c58a	1239	u_char rejp; / Pointer to next char in reject frame */
sunyiming	1:6465a3f5c58a	1240	u_char nakp; / Pointer to next char in Nak frame */
sunyiming	1:6465a3f5c58a	1241	int l = lenp; / Length left */
sunyiming	1:6465a3f5c58a	1242	#if TRACELCP > 0
sunyiming	1:6465a3f5c58a	1243	char traceBuf[80];
sunyiming	1:6465a3f5c58a	1244	size_t traceNdx = 0;
sunyiming	1:6465a3f5c58a	1245	#endif
sunyiming	1:6465a3f5c58a	1246
sunyiming	1:6465a3f5c58a	1247	/*
sunyiming	1:6465a3f5c58a	1248	* Reset all his options.
sunyiming	1:6465a3f5c58a	1249	*/
sunyiming	1:6465a3f5c58a	1250	BZERO(ho, sizeof(*ho));
sunyiming	1:6465a3f5c58a	1251
sunyiming	1:6465a3f5c58a	1252	/*
sunyiming	1:6465a3f5c58a	1253	* Process all his options.
sunyiming	1:6465a3f5c58a	1254	*/
sunyiming	1:6465a3f5c58a	1255	next = inp;
sunyiming	1:6465a3f5c58a	1256	nakp = nak_buffer;
sunyiming	1:6465a3f5c58a	1257	rejp = inp;
sunyiming	1:6465a3f5c58a	1258	while (l) {
sunyiming	1:6465a3f5c58a	1259	orc = CONFACK; /* Assume success */
sunyiming	1:6465a3f5c58a	1260	cip = p = next; /* Remember begining of CI */
sunyiming	1:6465a3f5c58a	1261	if (l < 2 \|\| /* Not enough data for CI header or */
sunyiming	1:6465a3f5c58a	1262	p[1] < 2 \|\| /* CI length too small or */
sunyiming	1:6465a3f5c58a	1263	p[1] > l) { /* CI length too big? */
sunyiming	1:6465a3f5c58a	1264	LCPDEBUG(LOG_WARNING, ("lcp_reqci: bad CI length!\n"));
sunyiming	1:6465a3f5c58a	1265	orc = CONFREJ; /* Reject bad CI */
sunyiming	1:6465a3f5c58a	1266	cilen = l; /* Reject till end of packet */
sunyiming	1:6465a3f5c58a	1267	l = 0; /* Don't loop again */
sunyiming	1:6465a3f5c58a	1268	citype = 0;
sunyiming	1:6465a3f5c58a	1269	goto endswitch;
sunyiming	1:6465a3f5c58a	1270	}
sunyiming	1:6465a3f5c58a	1271	GETCHAR(citype, p); /* Parse CI type */
sunyiming	1:6465a3f5c58a	1272	GETCHAR(cilen, p); /* Parse CI length */
sunyiming	1:6465a3f5c58a	1273	l -= cilen; /* Adjust remaining length */
sunyiming	1:6465a3f5c58a	1274	next += cilen; /* Step to next CI */
sunyiming	1:6465a3f5c58a	1275
sunyiming	1:6465a3f5c58a	1276	switch (citype) { /* Check CI type */
sunyiming	1:6465a3f5c58a	1277	case CI_MRU:
sunyiming	1:6465a3f5c58a	1278	if (!ao->neg_mru) { /* Allow option? */
sunyiming	1:6465a3f5c58a	1279	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - not allowed\n"));
sunyiming	1:6465a3f5c58a	1280	orc = CONFREJ; /* Reject CI */
sunyiming	1:6465a3f5c58a	1281	break;
sunyiming	1:6465a3f5c58a	1282	} else if (cilen != CILEN_SHORT) { /* Check CI length */
sunyiming	1:6465a3f5c58a	1283	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject MRU - bad length\n"));
sunyiming	1:6465a3f5c58a	1284	orc = CONFREJ; /* Reject CI */
sunyiming	1:6465a3f5c58a	1285	break;
sunyiming	1:6465a3f5c58a	1286	}
sunyiming	1:6465a3f5c58a	1287	GETSHORT(cishort, p); /* Parse MRU */
sunyiming	1:6465a3f5c58a	1288
sunyiming	1:6465a3f5c58a	1289	/*
sunyiming	1:6465a3f5c58a	1290	* He must be able to receive at least our minimum.
sunyiming	1:6465a3f5c58a	1291	* No need to check a maximum. If he sends a large number,
sunyiming	1:6465a3f5c58a	1292	* we'll just ignore it.
sunyiming	1:6465a3f5c58a	1293	*/
sunyiming	1:6465a3f5c58a	1294	if (cishort < PPP_MINMRU) {
sunyiming	1:6465a3f5c58a	1295	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak - MRU too small\n"));
sunyiming	1:6465a3f5c58a	1296	orc = CONFNAK; /* Nak CI */
sunyiming	1:6465a3f5c58a	1297	PUTCHAR(CI_MRU, nakp);
sunyiming	1:6465a3f5c58a	1298	PUTCHAR(CILEN_SHORT, nakp);
sunyiming	1:6465a3f5c58a	1299	PUTSHORT(PPP_MINMRU, nakp); /* Give him a hint */
sunyiming	1:6465a3f5c58a	1300	break;
sunyiming	1:6465a3f5c58a	1301	}
sunyiming	1:6465a3f5c58a	1302	ho->neg_mru = 1; /* Remember he sent MRU */
sunyiming	1:6465a3f5c58a	1303	ho->mru = cishort; /* And remember value */
sunyiming	1:6465a3f5c58a	1304	#if TRACELCP > 0
sunyiming	1:6465a3f5c58a	1305	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MRU %d", cishort);
sunyiming	1:6465a3f5c58a	1306	traceNdx = strlen(traceBuf);
sunyiming	1:6465a3f5c58a	1307	#endif
sunyiming	1:6465a3f5c58a	1308	break;
sunyiming	1:6465a3f5c58a	1309
sunyiming	1:6465a3f5c58a	1310	case CI_ASYNCMAP:
sunyiming	1:6465a3f5c58a	1311	if (!ao->neg_asyncmap) {
sunyiming	1:6465a3f5c58a	1312	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP not allowed\n"));
sunyiming	1:6465a3f5c58a	1313	orc = CONFREJ;
sunyiming	1:6465a3f5c58a	1314	break;
sunyiming	1:6465a3f5c58a	1315	} else if (cilen != CILEN_LONG) {
sunyiming	1:6465a3f5c58a	1316	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject ASYNCMAP bad length\n"));
sunyiming	1:6465a3f5c58a	1317	orc = CONFREJ;
sunyiming	1:6465a3f5c58a	1318	break;
sunyiming	1:6465a3f5c58a	1319	}
sunyiming	1:6465a3f5c58a	1320	GETLONG(cilong, p);
sunyiming	1:6465a3f5c58a	1321
sunyiming	1:6465a3f5c58a	1322	/*
sunyiming	1:6465a3f5c58a	1323	* Asyncmap must have set at least the bits
sunyiming	1:6465a3f5c58a	1324	* which are set in lcp_allowoptions[unit].asyncmap.
sunyiming	1:6465a3f5c58a	1325	*/
sunyiming	1:6465a3f5c58a	1326	if ((ao->asyncmap & ~cilong) != 0) {
sunyiming	1:6465a3f5c58a	1327	LCPDEBUG(LOG_INFO, ("lcp_reqci: Nak ASYNCMAP %lX missing %lX\n",
sunyiming	1:6465a3f5c58a	1328	cilong, ao->asyncmap));
sunyiming	1:6465a3f5c58a	1329	orc = CONFNAK;
sunyiming	1:6465a3f5c58a	1330	PUTCHAR(CI_ASYNCMAP, nakp);
sunyiming	1:6465a3f5c58a	1331	PUTCHAR(CILEN_LONG, nakp);
sunyiming	1:6465a3f5c58a	1332	PUTLONG(ao->asyncmap \| cilong, nakp);
sunyiming	1:6465a3f5c58a	1333	break;
sunyiming	1:6465a3f5c58a	1334	}
sunyiming	1:6465a3f5c58a	1335	ho->neg_asyncmap = 1;
sunyiming	1:6465a3f5c58a	1336	ho->asyncmap = cilong;
sunyiming	1:6465a3f5c58a	1337	#if TRACELCP > 0
sunyiming	1:6465a3f5c58a	1338	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ASYNCMAP=%lX", cilong);
sunyiming	1:6465a3f5c58a	1339	traceNdx = strlen(traceBuf);
sunyiming	1:6465a3f5c58a	1340	#endif
sunyiming	1:6465a3f5c58a	1341	break;
sunyiming	1:6465a3f5c58a	1342
sunyiming	1:6465a3f5c58a	1343	case CI_AUTHTYPE:
sunyiming	1:6465a3f5c58a	1344	if (cilen < CILEN_SHORT) {
sunyiming	1:6465a3f5c58a	1345	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE missing arg\n"));
sunyiming	1:6465a3f5c58a	1346	orc = CONFREJ;
sunyiming	1:6465a3f5c58a	1347	break;
sunyiming	1:6465a3f5c58a	1348	} else if (!(ao->neg_upap \|\| ao->neg_chap)) {
sunyiming	1:6465a3f5c58a	1349	/*
sunyiming	1:6465a3f5c58a	1350	* Reject the option if we're not willing to authenticate.
sunyiming	1:6465a3f5c58a	1351	*/
sunyiming	1:6465a3f5c58a	1352	LCPDEBUG(LOG_INFO, ("lcp_reqci: Reject AUTHTYPE not allowed\n"));
sunyiming	1:6465a3f5c58a	1353	orc = CONFREJ;
sunyiming	1:6465a3f5c58a	1354	break;
sunyiming	1:6465a3f5c58a	1355	}
sunyiming	1:6465a3f5c58a	1356	GETSHORT(cishort, p);
sunyiming	1:6465a3f5c58a	1357
sunyiming	1:6465a3f5c58a	1358	/*
sunyiming	1:6465a3f5c58a	1359	* Authtype must be UPAP or CHAP.
sunyiming	1:6465a3f5c58a	1360	*
sunyiming	1:6465a3f5c58a	1361	* Note: if both ao->neg_upap and ao->neg_chap are set,
sunyiming	1:6465a3f5c58a	1362	* and the peer sends a Configure-Request with two
sunyiming	1:6465a3f5c58a	1363	* authenticate-protocol requests, one for CHAP and one
sunyiming	1:6465a3f5c58a	1364	* for UPAP, then we will reject the second request.
sunyiming	1:6465a3f5c58a	1365	* Whether we end up doing CHAP or UPAP depends then on
sunyiming	1:6465a3f5c58a	1366	* the ordering of the CIs in the peer's Configure-Request.
sunyiming	1:6465a3f5c58a	1367	*/
sunyiming	1:6465a3f5c58a	1368
sunyiming	1:6465a3f5c58a	1369	if (cishort == PPP_PAP) {
sunyiming	1:6465a3f5c58a	1370	if (ho->neg_chap) { /* we've already accepted CHAP */
sunyiming	1:6465a3f5c58a	1371	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP already accepted\n"));
sunyiming	1:6465a3f5c58a	1372	orc = CONFREJ;
sunyiming	1:6465a3f5c58a	1373	break;
sunyiming	1:6465a3f5c58a	1374	} else if (cilen != CILEN_SHORT) {
sunyiming	1:6465a3f5c58a	1375	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE PAP bad len\n"));
sunyiming	1:6465a3f5c58a	1376	orc = CONFREJ;
sunyiming	1:6465a3f5c58a	1377	break;
sunyiming	1:6465a3f5c58a	1378	}
sunyiming	1:6465a3f5c58a	1379	if (!ao->neg_upap) { /* we don't want to do PAP */
sunyiming	1:6465a3f5c58a	1380	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE PAP not allowed\n"));
sunyiming	1:6465a3f5c58a	1381	orc = CONFNAK; /* NAK it and suggest CHAP */
sunyiming	1:6465a3f5c58a	1382	PUTCHAR(CI_AUTHTYPE, nakp);
sunyiming	1:6465a3f5c58a	1383	PUTCHAR(CILEN_CHAP, nakp);
sunyiming	1:6465a3f5c58a	1384	PUTSHORT(PPP_CHAP, nakp);
sunyiming	1:6465a3f5c58a	1385	PUTCHAR(ao->chap_mdtype, nakp);
sunyiming	1:6465a3f5c58a	1386	break;
sunyiming	1:6465a3f5c58a	1387	}
sunyiming	1:6465a3f5c58a	1388	ho->neg_upap = 1;
sunyiming	1:6465a3f5c58a	1389	#if TRACELCP > 0
sunyiming	1:6465a3f5c58a	1390	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PAP (%X)", cishort);
sunyiming	1:6465a3f5c58a	1391	traceNdx = strlen(traceBuf);
sunyiming	1:6465a3f5c58a	1392	#endif
sunyiming	1:6465a3f5c58a	1393	break;
sunyiming	1:6465a3f5c58a	1394	}
sunyiming	1:6465a3f5c58a	1395	if (cishort == PPP_CHAP) {
sunyiming	1:6465a3f5c58a	1396	if (ho->neg_upap) { /* we've already accepted PAP */
sunyiming	1:6465a3f5c58a	1397	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP accepted PAP\n"));
sunyiming	1:6465a3f5c58a	1398	orc = CONFREJ;
sunyiming	1:6465a3f5c58a	1399	break;
sunyiming	1:6465a3f5c58a	1400	} else if (cilen != CILEN_CHAP) {
sunyiming	1:6465a3f5c58a	1401	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Reject AUTHTYPE CHAP bad len\n"));
sunyiming	1:6465a3f5c58a	1402	orc = CONFREJ;
sunyiming	1:6465a3f5c58a	1403	break;
sunyiming	1:6465a3f5c58a	1404	}
sunyiming	1:6465a3f5c58a	1405	if (!ao->neg_chap) { /* we don't want to do CHAP */
sunyiming	1:6465a3f5c58a	1406	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP not allowed\n"));
sunyiming	1:6465a3f5c58a	1407	orc = CONFNAK; /* NAK it and suggest PAP */
sunyiming	1:6465a3f5c58a	1408	PUTCHAR(CI_AUTHTYPE, nakp);
sunyiming	1:6465a3f5c58a	1409	PUTCHAR(CILEN_SHORT, nakp);
sunyiming	1:6465a3f5c58a	1410	PUTSHORT(PPP_PAP, nakp);
sunyiming	1:6465a3f5c58a	1411	break;
sunyiming	1:6465a3f5c58a	1412	}
sunyiming	1:6465a3f5c58a	1413	GETCHAR(cichar, p); /* get digest type*/
sunyiming	1:6465a3f5c58a	1414	if (cichar != CHAP_DIGEST_MD5
sunyiming	1:6465a3f5c58a	1415	#if MSCHAP_SUPPORT
sunyiming	1:6465a3f5c58a	1416	&& cichar != CHAP_MICROSOFT
sunyiming	1:6465a3f5c58a	1417	#endif
sunyiming	1:6465a3f5c58a	1418	) {
sunyiming	1:6465a3f5c58a	1419	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE CHAP digest=%d\n", (int)cichar));
sunyiming	1:6465a3f5c58a	1420	orc = CONFNAK;
sunyiming	1:6465a3f5c58a	1421	PUTCHAR(CI_AUTHTYPE, nakp);
sunyiming	1:6465a3f5c58a	1422	PUTCHAR(CILEN_CHAP, nakp);
sunyiming	1:6465a3f5c58a	1423	PUTSHORT(PPP_CHAP, nakp);
sunyiming	1:6465a3f5c58a	1424	PUTCHAR(ao->chap_mdtype, nakp);
sunyiming	1:6465a3f5c58a	1425	break;
sunyiming	1:6465a3f5c58a	1426	}
sunyiming	1:6465a3f5c58a	1427	#if TRACELCP > 0
sunyiming	1:6465a3f5c58a	1428	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CHAP %X,%d", cishort, (int)cichar);
sunyiming	1:6465a3f5c58a	1429	traceNdx = strlen(traceBuf);
sunyiming	1:6465a3f5c58a	1430	#endif
sunyiming	1:6465a3f5c58a	1431	ho->chap_mdtype = cichar; /* save md type */
sunyiming	1:6465a3f5c58a	1432	ho->neg_chap = 1;
sunyiming	1:6465a3f5c58a	1433	break;
sunyiming	1:6465a3f5c58a	1434	}
sunyiming	1:6465a3f5c58a	1435
sunyiming	1:6465a3f5c58a	1436	/*
sunyiming	1:6465a3f5c58a	1437	* We don't recognize the protocol they're asking for.
sunyiming	1:6465a3f5c58a	1438	* Nak it with something we're willing to do.
sunyiming	1:6465a3f5c58a	1439	* (At this point we know ao->neg_upap \|\| ao->neg_chap.)
sunyiming	1:6465a3f5c58a	1440	*/
sunyiming	1:6465a3f5c58a	1441	orc = CONFNAK;
sunyiming	1:6465a3f5c58a	1442	PUTCHAR(CI_AUTHTYPE, nakp);
sunyiming	1:6465a3f5c58a	1443	if (ao->neg_chap) {
sunyiming	1:6465a3f5c58a	1444	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req CHAP\n", cishort));
sunyiming	1:6465a3f5c58a	1445	PUTCHAR(CILEN_CHAP, nakp);
sunyiming	1:6465a3f5c58a	1446	PUTSHORT(PPP_CHAP, nakp);
sunyiming	1:6465a3f5c58a	1447	PUTCHAR(ao->chap_mdtype, nakp);
sunyiming	1:6465a3f5c58a	1448	} else {
sunyiming	1:6465a3f5c58a	1449	LCPDEBUG(LOG_WARNING, ("lcp_reqci: Nak AUTHTYPE %d req PAP\n", cishort));
sunyiming	1:6465a3f5c58a	1450	PUTCHAR(CILEN_SHORT, nakp);
sunyiming	1:6465a3f5c58a	1451	PUTSHORT(PPP_PAP, nakp);
sunyiming	1:6465a3f5c58a	1452	}
sunyiming	1:6465a3f5c58a	1453	break;
sunyiming	1:6465a3f5c58a	1454
sunyiming	1:6465a3f5c58a	1455	case CI_QUALITY:
sunyiming	1:6465a3f5c58a	1456	GETSHORT(cishort, p);
sunyiming	1:6465a3f5c58a	1457	GETLONG(cilong, p);
sunyiming	1:6465a3f5c58a	1458	#if TRACELCP > 0
sunyiming	1:6465a3f5c58a	1459	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " QUALITY (%x %x)", cishort, (unsigned int) cilong);
sunyiming	1:6465a3f5c58a	1460	traceNdx = strlen(traceBuf);
sunyiming	1:6465a3f5c58a	1461	#endif
sunyiming	1:6465a3f5c58a	1462
sunyiming	1:6465a3f5c58a	1463	if (!ao->neg_lqr \|\|
sunyiming	1:6465a3f5c58a	1464	cilen != CILEN_LQR) {
sunyiming	1:6465a3f5c58a	1465	orc = CONFREJ;
sunyiming	1:6465a3f5c58a	1466	break;
sunyiming	1:6465a3f5c58a	1467	}
sunyiming	1:6465a3f5c58a	1468
sunyiming	1:6465a3f5c58a	1469	/*
sunyiming	1:6465a3f5c58a	1470	* Check the protocol and the reporting period.
sunyiming	1:6465a3f5c58a	1471	* XXX When should we Nak this, and what with?
sunyiming	1:6465a3f5c58a	1472	*/
sunyiming	1:6465a3f5c58a	1473	if (cishort != PPP_LQR) {
sunyiming	1:6465a3f5c58a	1474	orc = CONFNAK;
sunyiming	1:6465a3f5c58a	1475	PUTCHAR(CI_QUALITY, nakp);
sunyiming	1:6465a3f5c58a	1476	PUTCHAR(CILEN_LQR, nakp);
sunyiming	1:6465a3f5c58a	1477	PUTSHORT(PPP_LQR, nakp);
sunyiming	1:6465a3f5c58a	1478	PUTLONG(ao->lqr_period, nakp);
sunyiming	1:6465a3f5c58a	1479	break;
sunyiming	1:6465a3f5c58a	1480	}
sunyiming	1:6465a3f5c58a	1481	break;
sunyiming	1:6465a3f5c58a	1482
sunyiming	1:6465a3f5c58a	1483	case CI_MAGICNUMBER:
sunyiming	1:6465a3f5c58a	1484	if (!(ao->neg_magicnumber \|\| go->neg_magicnumber) \|\|
sunyiming	1:6465a3f5c58a	1485	cilen != CILEN_LONG) {
sunyiming	1:6465a3f5c58a	1486	orc = CONFREJ;
sunyiming	1:6465a3f5c58a	1487	break;
sunyiming	1:6465a3f5c58a	1488	}
sunyiming	1:6465a3f5c58a	1489	GETLONG(cilong, p);
sunyiming	1:6465a3f5c58a	1490	#if TRACELCP > 0
sunyiming	1:6465a3f5c58a	1491	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MAGICNUMBER (%lX)", cilong);
sunyiming	1:6465a3f5c58a	1492	traceNdx = strlen(traceBuf);
sunyiming	1:6465a3f5c58a	1493	#endif
sunyiming	1:6465a3f5c58a	1494
sunyiming	1:6465a3f5c58a	1495	/*
sunyiming	1:6465a3f5c58a	1496	* He must have a different magic number.
sunyiming	1:6465a3f5c58a	1497	*/
sunyiming	1:6465a3f5c58a	1498	if (go->neg_magicnumber &&
sunyiming	1:6465a3f5c58a	1499	cilong == go->magicnumber) {
sunyiming	1:6465a3f5c58a	1500	cilong = magic(); /* Don't put magic() inside macro! */
sunyiming	1:6465a3f5c58a	1501	orc = CONFNAK;
sunyiming	1:6465a3f5c58a	1502	PUTCHAR(CI_MAGICNUMBER, nakp);
sunyiming	1:6465a3f5c58a	1503	PUTCHAR(CILEN_LONG, nakp);
sunyiming	1:6465a3f5c58a	1504	PUTLONG(cilong, nakp);
sunyiming	1:6465a3f5c58a	1505	break;
sunyiming	1:6465a3f5c58a	1506	}
sunyiming	1:6465a3f5c58a	1507	ho->neg_magicnumber = 1;
sunyiming	1:6465a3f5c58a	1508	ho->magicnumber = cilong;
sunyiming	1:6465a3f5c58a	1509	break;
sunyiming	1:6465a3f5c58a	1510
sunyiming	1:6465a3f5c58a	1511
sunyiming	1:6465a3f5c58a	1512	case CI_PCOMPRESSION:
sunyiming	1:6465a3f5c58a	1513	#if TRACELCP > 0
sunyiming	1:6465a3f5c58a	1514	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PCOMPRESSION");
sunyiming	1:6465a3f5c58a	1515	traceNdx = strlen(traceBuf);
sunyiming	1:6465a3f5c58a	1516	#endif
sunyiming	1:6465a3f5c58a	1517	if (!ao->neg_pcompression \|\|
sunyiming	1:6465a3f5c58a	1518	cilen != CILEN_VOID) {
sunyiming	1:6465a3f5c58a	1519	orc = CONFREJ;
sunyiming	1:6465a3f5c58a	1520	break;
sunyiming	1:6465a3f5c58a	1521	}
sunyiming	1:6465a3f5c58a	1522	ho->neg_pcompression = 1;
sunyiming	1:6465a3f5c58a	1523	break;
sunyiming	1:6465a3f5c58a	1524
sunyiming	1:6465a3f5c58a	1525	case CI_ACCOMPRESSION:
sunyiming	1:6465a3f5c58a	1526	#if TRACELCP > 0
sunyiming	1:6465a3f5c58a	1527	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ACCOMPRESSION");
sunyiming	1:6465a3f5c58a	1528	traceNdx = strlen(traceBuf);
sunyiming	1:6465a3f5c58a	1529	#endif
sunyiming	1:6465a3f5c58a	1530	if (!ao->neg_accompression \|\|
sunyiming	1:6465a3f5c58a	1531	cilen != CILEN_VOID) {
sunyiming	1:6465a3f5c58a	1532	orc = CONFREJ;
sunyiming	1:6465a3f5c58a	1533	break;
sunyiming	1:6465a3f5c58a	1534	}
sunyiming	1:6465a3f5c58a	1535	ho->neg_accompression = 1;
sunyiming	1:6465a3f5c58a	1536	break;
sunyiming	1:6465a3f5c58a	1537
sunyiming	1:6465a3f5c58a	1538	case CI_MRRU:
sunyiming	1:6465a3f5c58a	1539	#if TRACELCP > 0
sunyiming	1:6465a3f5c58a	1540	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_MRRU");
sunyiming	1:6465a3f5c58a	1541	traceNdx = strlen(traceBuf);
sunyiming	1:6465a3f5c58a	1542	#endif
sunyiming	1:6465a3f5c58a	1543	orc = CONFREJ;
sunyiming	1:6465a3f5c58a	1544	break;
sunyiming	1:6465a3f5c58a	1545
sunyiming	1:6465a3f5c58a	1546	case CI_SSNHF:
sunyiming	1:6465a3f5c58a	1547	#if TRACELCP > 0
sunyiming	1:6465a3f5c58a	1548	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_SSNHF");
sunyiming	1:6465a3f5c58a	1549	traceNdx = strlen(traceBuf);
sunyiming	1:6465a3f5c58a	1550	#endif
sunyiming	1:6465a3f5c58a	1551	orc = CONFREJ;
sunyiming	1:6465a3f5c58a	1552	break;
sunyiming	1:6465a3f5c58a	1553
sunyiming	1:6465a3f5c58a	1554	case CI_EPDISC:
sunyiming	1:6465a3f5c58a	1555	#if TRACELCP > 0
sunyiming	1:6465a3f5c58a	1556	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_EPDISC");
sunyiming	1:6465a3f5c58a	1557	traceNdx = strlen(traceBuf);
sunyiming	1:6465a3f5c58a	1558	#endif
sunyiming	1:6465a3f5c58a	1559	orc = CONFREJ;
sunyiming	1:6465a3f5c58a	1560	break;
sunyiming	1:6465a3f5c58a	1561
sunyiming	1:6465a3f5c58a	1562	default:
sunyiming	1:6465a3f5c58a	1563	#if TRACELCP
sunyiming	1:6465a3f5c58a	1564	snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " unknown %d", citype);
sunyiming	1:6465a3f5c58a	1565	traceNdx = strlen(traceBuf);
sunyiming	1:6465a3f5c58a	1566	#endif
sunyiming	1:6465a3f5c58a	1567	orc = CONFREJ;
sunyiming	1:6465a3f5c58a	1568	break;
sunyiming	1:6465a3f5c58a	1569	}
sunyiming	1:6465a3f5c58a	1570
sunyiming	1:6465a3f5c58a	1571	endswitch:
sunyiming	1:6465a3f5c58a	1572	#if TRACELCP
sunyiming	1:6465a3f5c58a	1573	if (traceNdx >= 80 - 32) {
sunyiming	1:6465a3f5c58a	1574	LCPDEBUG(LOG_INFO, ("lcp_reqci: rcvd%s\n", traceBuf));
sunyiming	1:6465a3f5c58a	1575	traceNdx = 0;
sunyiming	1:6465a3f5c58a	1576	}
sunyiming	1:6465a3f5c58a	1577	#endif
sunyiming	1:6465a3f5c58a	1578	if (orc == CONFACK && /* Good CI */
sunyiming	1:6465a3f5c58a	1579	rc != CONFACK) { /* but prior CI wasnt? */
sunyiming	1:6465a3f5c58a	1580	continue; /* Don't send this one */
sunyiming	1:6465a3f5c58a	1581	}
sunyiming	1:6465a3f5c58a	1582
sunyiming	1:6465a3f5c58a	1583	if (orc == CONFNAK) { /* Nak this CI? */
sunyiming	1:6465a3f5c58a	1584	if (reject_if_disagree /* Getting fed up with sending NAKs? */
sunyiming	1:6465a3f5c58a	1585	&& citype != CI_MAGICNUMBER) {
sunyiming	1:6465a3f5c58a	1586	orc = CONFREJ; /* Get tough if so */
sunyiming	1:6465a3f5c58a	1587	} else {
sunyiming	1:6465a3f5c58a	1588	if (rc == CONFREJ) { /* Rejecting prior CI? */
sunyiming	1:6465a3f5c58a	1589	continue; /* Don't send this one */
sunyiming	1:6465a3f5c58a	1590	}
sunyiming	1:6465a3f5c58a	1591	rc = CONFNAK;
sunyiming	1:6465a3f5c58a	1592	}
sunyiming	1:6465a3f5c58a	1593	}
sunyiming	1:6465a3f5c58a	1594	if (orc == CONFREJ) { /* Reject this CI */
sunyiming	1:6465a3f5c58a	1595	rc = CONFREJ;
sunyiming	1:6465a3f5c58a	1596	if (cip != rejp) { /* Need to move rejected CI? */
sunyiming	1:6465a3f5c58a	1597	BCOPY(cip, rejp, cilen); /* Move it */
sunyiming	1:6465a3f5c58a	1598	}
sunyiming	1:6465a3f5c58a	1599	INCPTR(cilen, rejp); /* Update output pointer */
sunyiming	1:6465a3f5c58a	1600	}
sunyiming	1:6465a3f5c58a	1601	}
sunyiming	1:6465a3f5c58a	1602
sunyiming	1:6465a3f5c58a	1603	/*
sunyiming	1:6465a3f5c58a	1604	* If we wanted to send additional NAKs (for unsent CIs), the
sunyiming	1:6465a3f5c58a	1605	* code would go here. The extra NAKs would go at *nakp.
sunyiming	1:6465a3f5c58a	1606	* At present there are no cases where we want to ask the
sunyiming	1:6465a3f5c58a	1607	* peer to negotiate an option.
sunyiming	1:6465a3f5c58a	1608	*/
sunyiming	1:6465a3f5c58a	1609
sunyiming	1:6465a3f5c58a	1610	switch (rc) {
sunyiming	1:6465a3f5c58a	1611	case CONFACK:
sunyiming	1:6465a3f5c58a	1612	*lenp = (int)(next - inp);
sunyiming	1:6465a3f5c58a	1613	break;
sunyiming	1:6465a3f5c58a	1614	case CONFNAK:
sunyiming	1:6465a3f5c58a	1615	/*
sunyiming	1:6465a3f5c58a	1616	* Copy the Nak'd options from the nak_buffer to the caller's buffer.
sunyiming	1:6465a3f5c58a	1617	*/
sunyiming	1:6465a3f5c58a	1618	*lenp = (int)(nakp - nak_buffer);
sunyiming	1:6465a3f5c58a	1619	BCOPY(nak_buffer, inp, *lenp);
sunyiming	1:6465a3f5c58a	1620	break;
sunyiming	1:6465a3f5c58a	1621	case CONFREJ:
sunyiming	1:6465a3f5c58a	1622	*lenp = (int)(rejp - inp);
sunyiming	1:6465a3f5c58a	1623	break;
sunyiming	1:6465a3f5c58a	1624	}
sunyiming	1:6465a3f5c58a	1625
sunyiming	1:6465a3f5c58a	1626	#if TRACELCP > 0
sunyiming	1:6465a3f5c58a	1627	if (traceNdx > 0) {
sunyiming	1:6465a3f5c58a	1628	LCPDEBUG(LOG_INFO, ("lcp_reqci: %s\n", traceBuf));
sunyiming	1:6465a3f5c58a	1629	}
sunyiming	1:6465a3f5c58a	1630	#endif
sunyiming	1:6465a3f5c58a	1631	LCPDEBUG(LOG_INFO, ("lcp_reqci: returning CONF%s.\n", CODENAME(rc)));
sunyiming	1:6465a3f5c58a	1632	return (rc); /* Return final code */
sunyiming	1:6465a3f5c58a	1633	}
sunyiming	1:6465a3f5c58a	1634
sunyiming	1:6465a3f5c58a	1635
sunyiming	1:6465a3f5c58a	1636	/*
sunyiming	1:6465a3f5c58a	1637	* lcp_up - LCP has come UP.
sunyiming	1:6465a3f5c58a	1638	*/
sunyiming	1:6465a3f5c58a	1639	static void
sunyiming	1:6465a3f5c58a	1640	lcp_up(fsm *f)
sunyiming	1:6465a3f5c58a	1641	{
sunyiming	1:6465a3f5c58a	1642	lcp_options *wo = &lcp_wantoptions[f->unit];
sunyiming	1:6465a3f5c58a	1643	lcp_options *ho = &lcp_hisoptions[f->unit];
sunyiming	1:6465a3f5c58a	1644	lcp_options *go = &lcp_gotoptions[f->unit];
sunyiming	1:6465a3f5c58a	1645	lcp_options *ao = &lcp_allowoptions[f->unit];
sunyiming	1:6465a3f5c58a	1646
sunyiming	1:6465a3f5c58a	1647	if (!go->neg_magicnumber) {
sunyiming	1:6465a3f5c58a	1648	go->magicnumber = 0;
sunyiming	1:6465a3f5c58a	1649	}
sunyiming	1:6465a3f5c58a	1650	if (!ho->neg_magicnumber) {
sunyiming	1:6465a3f5c58a	1651	ho->magicnumber = 0;
sunyiming	1:6465a3f5c58a	1652	}
sunyiming	1:6465a3f5c58a	1653
sunyiming	1:6465a3f5c58a	1654	/*
sunyiming	1:6465a3f5c58a	1655	* Set our MTU to the smaller of the MTU we wanted and
sunyiming	1:6465a3f5c58a	1656	* the MRU our peer wanted. If we negotiated an MRU,
sunyiming	1:6465a3f5c58a	1657	* set our MRU to the larger of value we wanted and
sunyiming	1:6465a3f5c58a	1658	* the value we got in the negotiation.
sunyiming	1:6465a3f5c58a	1659	*/
sunyiming	1:6465a3f5c58a	1660	ppp_send_config(f->unit, LWIP_MIN(ao->mru, (ho->neg_mru? ho->mru: PPP_MRU)),
sunyiming	1:6465a3f5c58a	1661	(ho->neg_asyncmap? ho->asyncmap: 0xffffffffl),
sunyiming	1:6465a3f5c58a	1662	ho->neg_pcompression, ho->neg_accompression);
sunyiming	1:6465a3f5c58a	1663	/*
sunyiming	1:6465a3f5c58a	1664	* If the asyncmap hasn't been negotiated, we really should
sunyiming	1:6465a3f5c58a	1665	* set the receive asyncmap to ffffffff, but we set it to 0
sunyiming	1:6465a3f5c58a	1666	* for backwards contemptibility.
sunyiming	1:6465a3f5c58a	1667	*/
sunyiming	1:6465a3f5c58a	1668	ppp_recv_config(f->unit, (go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU),
sunyiming	1:6465a3f5c58a	1669	(go->neg_asyncmap? go->asyncmap: 0x00000000),
sunyiming	1:6465a3f5c58a	1670	go->neg_pcompression, go->neg_accompression);
sunyiming	1:6465a3f5c58a	1671
sunyiming	1:6465a3f5c58a	1672	if (ho->neg_mru) {
sunyiming	1:6465a3f5c58a	1673	peer_mru[f->unit] = ho->mru;
sunyiming	1:6465a3f5c58a	1674	}
sunyiming	1:6465a3f5c58a	1675
sunyiming	1:6465a3f5c58a	1676	lcp_echo_lowerup(f->unit); /* Enable echo messages */
sunyiming	1:6465a3f5c58a	1677
sunyiming	1:6465a3f5c58a	1678	link_established(f->unit); /* The link is up; authenticate now */
sunyiming	1:6465a3f5c58a	1679	}
sunyiming	1:6465a3f5c58a	1680
sunyiming	1:6465a3f5c58a	1681
sunyiming	1:6465a3f5c58a	1682	/*
sunyiming	1:6465a3f5c58a	1683	* lcp_down - LCP has gone DOWN.
sunyiming	1:6465a3f5c58a	1684	*
sunyiming	1:6465a3f5c58a	1685	* Alert other protocols.
sunyiming	1:6465a3f5c58a	1686	*/
sunyiming	1:6465a3f5c58a	1687	static void
sunyiming	1:6465a3f5c58a	1688	lcp_down(fsm *f)
sunyiming	1:6465a3f5c58a	1689	{
sunyiming	1:6465a3f5c58a	1690	lcp_options *go = &lcp_gotoptions[f->unit];
sunyiming	1:6465a3f5c58a	1691
sunyiming	1:6465a3f5c58a	1692	lcp_echo_lowerdown(f->unit);
sunyiming	1:6465a3f5c58a	1693
sunyiming	1:6465a3f5c58a	1694	link_down(f->unit);
sunyiming	1:6465a3f5c58a	1695
sunyiming	1:6465a3f5c58a	1696	ppp_send_config(f->unit, PPP_MRU, 0xffffffffl, 0, 0);
sunyiming	1:6465a3f5c58a	1697	ppp_recv_config(f->unit, PPP_MRU,
sunyiming	1:6465a3f5c58a	1698	(go->neg_asyncmap? go->asyncmap: 0x00000000),
sunyiming	1:6465a3f5c58a	1699	go->neg_pcompression, go->neg_accompression);
sunyiming	1:6465a3f5c58a	1700	peer_mru[f->unit] = PPP_MRU;
sunyiming	1:6465a3f5c58a	1701	}
sunyiming	1:6465a3f5c58a	1702
sunyiming	1:6465a3f5c58a	1703
sunyiming	1:6465a3f5c58a	1704	/*
sunyiming	1:6465a3f5c58a	1705	* lcp_starting - LCP needs the lower layer up.
sunyiming	1:6465a3f5c58a	1706	*/
sunyiming	1:6465a3f5c58a	1707	static void
sunyiming	1:6465a3f5c58a	1708	lcp_starting(fsm *f)
sunyiming	1:6465a3f5c58a	1709	{
sunyiming	1:6465a3f5c58a	1710	link_required(f->unit); /* lwip: currently does nothing */
sunyiming	1:6465a3f5c58a	1711	}
sunyiming	1:6465a3f5c58a	1712
sunyiming	1:6465a3f5c58a	1713
sunyiming	1:6465a3f5c58a	1714	/*
sunyiming	1:6465a3f5c58a	1715	* lcp_finished - LCP has finished with the lower layer.
sunyiming	1:6465a3f5c58a	1716	*/
sunyiming	1:6465a3f5c58a	1717	static void
sunyiming	1:6465a3f5c58a	1718	lcp_finished(fsm *f)
sunyiming	1:6465a3f5c58a	1719	{
sunyiming	1:6465a3f5c58a	1720	link_terminated(f->unit); /* we are finished with the link */
sunyiming	1:6465a3f5c58a	1721	}
sunyiming	1:6465a3f5c58a	1722
sunyiming	1:6465a3f5c58a	1723
sunyiming	1:6465a3f5c58a	1724	#if PPP_ADDITIONAL_CALLBACKS
sunyiming	1:6465a3f5c58a	1725	/*
sunyiming	1:6465a3f5c58a	1726	* print_string - print a readable representation of a string using
sunyiming	1:6465a3f5c58a	1727	* printer.
sunyiming	1:6465a3f5c58a	1728	*/
sunyiming	1:6465a3f5c58a	1729	static void
sunyiming	1:6465a3f5c58a	1730	print_string( char p, int len, void (printer) (void , char , ...), void *arg)
sunyiming	1:6465a3f5c58a	1731	{
sunyiming	1:6465a3f5c58a	1732	int c;
sunyiming	1:6465a3f5c58a	1733
sunyiming	1:6465a3f5c58a	1734	printer(arg, "\"");
sunyiming	1:6465a3f5c58a	1735	for (; len > 0; --len) {
sunyiming	1:6465a3f5c58a	1736	c = *p++;
sunyiming	1:6465a3f5c58a	1737	if (' ' <= c && c <= '~') {
sunyiming	1:6465a3f5c58a	1738	if (c == '\\' \|\| c == '"') {
sunyiming	1:6465a3f5c58a	1739	printer(arg, "\\");
sunyiming	1:6465a3f5c58a	1740	}
sunyiming	1:6465a3f5c58a	1741	printer(arg, "%c", c);
sunyiming	1:6465a3f5c58a	1742	} else {
sunyiming	1:6465a3f5c58a	1743	switch (c) {
sunyiming	1:6465a3f5c58a	1744	case '\n':
sunyiming	1:6465a3f5c58a	1745	printer(arg, "\\n");
sunyiming	1:6465a3f5c58a	1746	break;
sunyiming	1:6465a3f5c58a	1747	case '\r':
sunyiming	1:6465a3f5c58a	1748	printer(arg, "\\r");
sunyiming	1:6465a3f5c58a	1749	break;
sunyiming	1:6465a3f5c58a	1750	case '\t':
sunyiming	1:6465a3f5c58a	1751	printer(arg, "\\t");
sunyiming	1:6465a3f5c58a	1752	break;
sunyiming	1:6465a3f5c58a	1753	default:
sunyiming	1:6465a3f5c58a	1754	printer(arg, "\\%.3o", c);
sunyiming	1:6465a3f5c58a	1755	}
sunyiming	1:6465a3f5c58a	1756	}
sunyiming	1:6465a3f5c58a	1757	}
sunyiming	1:6465a3f5c58a	1758	printer(arg, "\"");
sunyiming	1:6465a3f5c58a	1759	}
sunyiming	1:6465a3f5c58a	1760
sunyiming	1:6465a3f5c58a	1761
sunyiming	1:6465a3f5c58a	1762	/*
sunyiming	1:6465a3f5c58a	1763	* lcp_printpkt - print the contents of an LCP packet.
sunyiming	1:6465a3f5c58a	1764	*/
sunyiming	1:6465a3f5c58a	1765	static char *lcp_codenames[] = {
sunyiming	1:6465a3f5c58a	1766	"ConfReq", "ConfAck", "ConfNak", "ConfRej",
sunyiming	1:6465a3f5c58a	1767	"TermReq", "TermAck", "CodeRej", "ProtRej",
sunyiming	1:6465a3f5c58a	1768	"EchoReq", "EchoRep", "DiscReq"
sunyiming	1:6465a3f5c58a	1769	};
sunyiming	1:6465a3f5c58a	1770
sunyiming	1:6465a3f5c58a	1771	static int
sunyiming	1:6465a3f5c58a	1772	lcp_printpkt( u_char p, int plen, void (printer) (void , char , ...), void *arg)
sunyiming	1:6465a3f5c58a	1773	{
sunyiming	1:6465a3f5c58a	1774	int code, id, len, olen;
sunyiming	1:6465a3f5c58a	1775	u_char pstart, optend;
sunyiming	1:6465a3f5c58a	1776	u_short cishort;
sunyiming	1:6465a3f5c58a	1777	u32_t cilong;
sunyiming	1:6465a3f5c58a	1778
sunyiming	1:6465a3f5c58a	1779	if (plen < HEADERLEN) {
sunyiming	1:6465a3f5c58a	1780	return 0;
sunyiming	1:6465a3f5c58a	1781	}
sunyiming	1:6465a3f5c58a	1782	pstart = p;
sunyiming	1:6465a3f5c58a	1783	GETCHAR(code, p);
sunyiming	1:6465a3f5c58a	1784	GETCHAR(id, p);
sunyiming	1:6465a3f5c58a	1785	GETSHORT(len, p);
sunyiming	1:6465a3f5c58a	1786	if (len < HEADERLEN \|\| len > plen) {
sunyiming	1:6465a3f5c58a	1787	return 0;
sunyiming	1:6465a3f5c58a	1788	}
sunyiming	1:6465a3f5c58a	1789
sunyiming	1:6465a3f5c58a	1790	if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *)) {
sunyiming	1:6465a3f5c58a	1791	printer(arg, " %s", lcp_codenames[code-1]);
sunyiming	1:6465a3f5c58a	1792	} else {
sunyiming	1:6465a3f5c58a	1793	printer(arg, " code=0x%x", code);
sunyiming	1:6465a3f5c58a	1794	}
sunyiming	1:6465a3f5c58a	1795	printer(arg, " id=0x%x", id);
sunyiming	1:6465a3f5c58a	1796	len -= HEADERLEN;
sunyiming	1:6465a3f5c58a	1797	switch (code) {
sunyiming	1:6465a3f5c58a	1798	case CONFREQ:
sunyiming	1:6465a3f5c58a	1799	case CONFACK:
sunyiming	1:6465a3f5c58a	1800	case CONFNAK:
sunyiming	1:6465a3f5c58a	1801	case CONFREJ:
sunyiming	1:6465a3f5c58a	1802	/* print option list */
sunyiming	1:6465a3f5c58a	1803	while (len >= 2) {
sunyiming	1:6465a3f5c58a	1804	GETCHAR(code, p);
sunyiming	1:6465a3f5c58a	1805	GETCHAR(olen, p);
sunyiming	1:6465a3f5c58a	1806	p -= 2;
sunyiming	1:6465a3f5c58a	1807	if (olen < 2 \|\| olen > len) {
sunyiming	1:6465a3f5c58a	1808	break;
sunyiming	1:6465a3f5c58a	1809	}
sunyiming	1:6465a3f5c58a	1810	printer(arg, " <");
sunyiming	1:6465a3f5c58a	1811	len -= olen;
sunyiming	1:6465a3f5c58a	1812	optend = p + olen;
sunyiming	1:6465a3f5c58a	1813	switch (code) {
sunyiming	1:6465a3f5c58a	1814	case CI_MRU:
sunyiming	1:6465a3f5c58a	1815	if (olen == CILEN_SHORT) {
sunyiming	1:6465a3f5c58a	1816	p += 2;
sunyiming	1:6465a3f5c58a	1817	GETSHORT(cishort, p);
sunyiming	1:6465a3f5c58a	1818	printer(arg, "mru %d", cishort);
sunyiming	1:6465a3f5c58a	1819	}
sunyiming	1:6465a3f5c58a	1820	break;
sunyiming	1:6465a3f5c58a	1821	case CI_ASYNCMAP:
sunyiming	1:6465a3f5c58a	1822	if (olen == CILEN_LONG) {
sunyiming	1:6465a3f5c58a	1823	p += 2;
sunyiming	1:6465a3f5c58a	1824	GETLONG(cilong, p);
sunyiming	1:6465a3f5c58a	1825	printer(arg, "asyncmap 0x%lx", cilong);
sunyiming	1:6465a3f5c58a	1826	}
sunyiming	1:6465a3f5c58a	1827	break;
sunyiming	1:6465a3f5c58a	1828	case CI_AUTHTYPE:
sunyiming	1:6465a3f5c58a	1829	if (olen >= CILEN_SHORT) {
sunyiming	1:6465a3f5c58a	1830	p += 2;
sunyiming	1:6465a3f5c58a	1831	printer(arg, "auth ");
sunyiming	1:6465a3f5c58a	1832	GETSHORT(cishort, p);
sunyiming	1:6465a3f5c58a	1833	switch (cishort) {
sunyiming	1:6465a3f5c58a	1834	case PPP_PAP:
sunyiming	1:6465a3f5c58a	1835	printer(arg, "pap");
sunyiming	1:6465a3f5c58a	1836	break;
sunyiming	1:6465a3f5c58a	1837	case PPP_CHAP:
sunyiming	1:6465a3f5c58a	1838	printer(arg, "chap");
sunyiming	1:6465a3f5c58a	1839	break;
sunyiming	1:6465a3f5c58a	1840	default:
sunyiming	1:6465a3f5c58a	1841	printer(arg, "0x%x", cishort);
sunyiming	1:6465a3f5c58a	1842	}
sunyiming	1:6465a3f5c58a	1843	}
sunyiming	1:6465a3f5c58a	1844	break;
sunyiming	1:6465a3f5c58a	1845	case CI_QUALITY:
sunyiming	1:6465a3f5c58a	1846	if (olen >= CILEN_SHORT) {
sunyiming	1:6465a3f5c58a	1847	p += 2;
sunyiming	1:6465a3f5c58a	1848	printer(arg, "quality ");
sunyiming	1:6465a3f5c58a	1849	GETSHORT(cishort, p);
sunyiming	1:6465a3f5c58a	1850	switch (cishort) {
sunyiming	1:6465a3f5c58a	1851	case PPP_LQR:
sunyiming	1:6465a3f5c58a	1852	printer(arg, "lqr");
sunyiming	1:6465a3f5c58a	1853	break;
sunyiming	1:6465a3f5c58a	1854	default:
sunyiming	1:6465a3f5c58a	1855	printer(arg, "0x%x", cishort);
sunyiming	1:6465a3f5c58a	1856	}
sunyiming	1:6465a3f5c58a	1857	}
sunyiming	1:6465a3f5c58a	1858	break;
sunyiming	1:6465a3f5c58a	1859	case CI_CALLBACK:
sunyiming	1:6465a3f5c58a	1860	if (olen >= CILEN_CHAR) {
sunyiming	1:6465a3f5c58a	1861	p += 2;
sunyiming	1:6465a3f5c58a	1862	printer(arg, "callback ");
sunyiming	1:6465a3f5c58a	1863	GETSHORT(cishort, p);
sunyiming	1:6465a3f5c58a	1864	switch (cishort) {
sunyiming	1:6465a3f5c58a	1865	case CBCP_OPT:
sunyiming	1:6465a3f5c58a	1866	printer(arg, "CBCP");
sunyiming	1:6465a3f5c58a	1867	break;
sunyiming	1:6465a3f5c58a	1868	default:
sunyiming	1:6465a3f5c58a	1869	printer(arg, "0x%x", cishort);
sunyiming	1:6465a3f5c58a	1870	}
sunyiming	1:6465a3f5c58a	1871	}
sunyiming	1:6465a3f5c58a	1872	break;
sunyiming	1:6465a3f5c58a	1873	case CI_MAGICNUMBER:
sunyiming	1:6465a3f5c58a	1874	if (olen == CILEN_LONG) {
sunyiming	1:6465a3f5c58a	1875	p += 2;
sunyiming	1:6465a3f5c58a	1876	GETLONG(cilong, p);
sunyiming	1:6465a3f5c58a	1877	printer(arg, "magic 0x%x", cilong);
sunyiming	1:6465a3f5c58a	1878	}
sunyiming	1:6465a3f5c58a	1879	break;
sunyiming	1:6465a3f5c58a	1880	case CI_PCOMPRESSION:
sunyiming	1:6465a3f5c58a	1881	if (olen == CILEN_VOID) {
sunyiming	1:6465a3f5c58a	1882	p += 2;
sunyiming	1:6465a3f5c58a	1883	printer(arg, "pcomp");
sunyiming	1:6465a3f5c58a	1884	}
sunyiming	1:6465a3f5c58a	1885	break;
sunyiming	1:6465a3f5c58a	1886	case CI_ACCOMPRESSION:
sunyiming	1:6465a3f5c58a	1887	if (olen == CILEN_VOID) {
sunyiming	1:6465a3f5c58a	1888	p += 2;
sunyiming	1:6465a3f5c58a	1889	printer(arg, "accomp");
sunyiming	1:6465a3f5c58a	1890	}
sunyiming	1:6465a3f5c58a	1891	break;
sunyiming	1:6465a3f5c58a	1892	}
sunyiming	1:6465a3f5c58a	1893	while (p < optend) {
sunyiming	1:6465a3f5c58a	1894	GETCHAR(code, p);
sunyiming	1:6465a3f5c58a	1895	printer(arg, " %.2x", code);
sunyiming	1:6465a3f5c58a	1896	}
sunyiming	1:6465a3f5c58a	1897	printer(arg, ">");
sunyiming	1:6465a3f5c58a	1898	}
sunyiming	1:6465a3f5c58a	1899	break;
sunyiming	1:6465a3f5c58a	1900
sunyiming	1:6465a3f5c58a	1901	case TERMACK:
sunyiming	1:6465a3f5c58a	1902	case TERMREQ:
sunyiming	1:6465a3f5c58a	1903	if (len > 0 && p >= ' ' && p < 0x7f) {
sunyiming	1:6465a3f5c58a	1904	printer(arg, " ");
sunyiming	1:6465a3f5c58a	1905	print_string((char*)p, len, printer, arg);
sunyiming	1:6465a3f5c58a	1906	p += len;
sunyiming	1:6465a3f5c58a	1907	len = 0;
sunyiming	1:6465a3f5c58a	1908	}
sunyiming	1:6465a3f5c58a	1909	break;
sunyiming	1:6465a3f5c58a	1910
sunyiming	1:6465a3f5c58a	1911	case ECHOREQ:
sunyiming	1:6465a3f5c58a	1912	case ECHOREP:
sunyiming	1:6465a3f5c58a	1913	case DISCREQ:
sunyiming	1:6465a3f5c58a	1914	if (len >= 4) {
sunyiming	1:6465a3f5c58a	1915	GETLONG(cilong, p);
sunyiming	1:6465a3f5c58a	1916	printer(arg, " magic=0x%x", cilong);
sunyiming	1:6465a3f5c58a	1917	p += 4;
sunyiming	1:6465a3f5c58a	1918	len -= 4;
sunyiming	1:6465a3f5c58a	1919	}
sunyiming	1:6465a3f5c58a	1920	break;
sunyiming	1:6465a3f5c58a	1921	}
sunyiming	1:6465a3f5c58a	1922
sunyiming	1:6465a3f5c58a	1923	/* print the rest of the bytes in the packet */
sunyiming	1:6465a3f5c58a	1924	for (; len > 0; --len) {
sunyiming	1:6465a3f5c58a	1925	GETCHAR(code, p);
sunyiming	1:6465a3f5c58a	1926	printer(arg, " %.2x", code);
sunyiming	1:6465a3f5c58a	1927	}
sunyiming	1:6465a3f5c58a	1928
sunyiming	1:6465a3f5c58a	1929	return (int)(p - pstart);
sunyiming	1:6465a3f5c58a	1930	}
sunyiming	1:6465a3f5c58a	1931	#endif /* PPP_ADDITIONAL_CALLBACKS */
sunyiming	1:6465a3f5c58a	1932
sunyiming	1:6465a3f5c58a	1933	/*
sunyiming	1:6465a3f5c58a	1934	* Time to shut down the link because there is nothing out there.
sunyiming	1:6465a3f5c58a	1935	*/
sunyiming	1:6465a3f5c58a	1936	static void
sunyiming	1:6465a3f5c58a	1937	LcpLinkFailure (fsm *f)
sunyiming	1:6465a3f5c58a	1938	{
sunyiming	1:6465a3f5c58a	1939	if (f->state == LS_OPENED) {
sunyiming	1:6465a3f5c58a	1940	LCPDEBUG(LOG_INFO, ("No response to %d echo-requests\n", lcp_echos_pending));
sunyiming	1:6465a3f5c58a	1941	LCPDEBUG(LOG_NOTICE, ("Serial link appears to be disconnected.\n"));
sunyiming	1:6465a3f5c58a	1942	lcp_close(f->unit, "Peer not responding");
sunyiming	1:6465a3f5c58a	1943	}
sunyiming	1:6465a3f5c58a	1944	}
sunyiming	1:6465a3f5c58a	1945
sunyiming	1:6465a3f5c58a	1946	/*
sunyiming	1:6465a3f5c58a	1947	* Timer expired for the LCP echo requests from this process.
sunyiming	1:6465a3f5c58a	1948	*/
sunyiming	1:6465a3f5c58a	1949	static void
sunyiming	1:6465a3f5c58a	1950	LcpEchoCheck (fsm *f)
sunyiming	1:6465a3f5c58a	1951	{
sunyiming	1:6465a3f5c58a	1952	LcpSendEchoRequest (f);
sunyiming	1:6465a3f5c58a	1953
sunyiming	1:6465a3f5c58a	1954	/*
sunyiming	1:6465a3f5c58a	1955	* Start the timer for the next interval.
sunyiming	1:6465a3f5c58a	1956	*/
sunyiming	1:6465a3f5c58a	1957	LWIP_ASSERT("lcp_echo_timer_running == 0", lcp_echo_timer_running == 0);
sunyiming	1:6465a3f5c58a	1958
sunyiming	1:6465a3f5c58a	1959	TIMEOUT (LcpEchoTimeout, f, lcp_echo_interval);
sunyiming	1:6465a3f5c58a	1960	lcp_echo_timer_running = 1;
sunyiming	1:6465a3f5c58a	1961	}
sunyiming	1:6465a3f5c58a	1962
sunyiming	1:6465a3f5c58a	1963	/*
sunyiming	1:6465a3f5c58a	1964	* LcpEchoTimeout - Timer expired on the LCP echo
sunyiming	1:6465a3f5c58a	1965	*/
sunyiming	1:6465a3f5c58a	1966	static void
sunyiming	1:6465a3f5c58a	1967	LcpEchoTimeout (void *arg)
sunyiming	1:6465a3f5c58a	1968	{
sunyiming	1:6465a3f5c58a	1969	if (lcp_echo_timer_running != 0) {
sunyiming	1:6465a3f5c58a	1970	lcp_echo_timer_running = 0;
sunyiming	1:6465a3f5c58a	1971	LcpEchoCheck ((fsm *) arg);
sunyiming	1:6465a3f5c58a	1972	}
sunyiming	1:6465a3f5c58a	1973	}
sunyiming	1:6465a3f5c58a	1974
sunyiming	1:6465a3f5c58a	1975	/*
sunyiming	1:6465a3f5c58a	1976	* LcpEchoReply - LCP has received a reply to the echo
sunyiming	1:6465a3f5c58a	1977	*/
sunyiming	1:6465a3f5c58a	1978	static void
sunyiming	1:6465a3f5c58a	1979	lcp_received_echo_reply (fsm f, int id, u_char inp, int len)
sunyiming	1:6465a3f5c58a	1980	{
sunyiming	1:6465a3f5c58a	1981	u32_t magic;
sunyiming	1:6465a3f5c58a	1982
sunyiming	1:6465a3f5c58a	1983	LWIP_UNUSED_ARG(id);
sunyiming	1:6465a3f5c58a	1984
sunyiming	1:6465a3f5c58a	1985	/* Check the magic number - don't count replies from ourselves. */
sunyiming	1:6465a3f5c58a	1986	if (len < 4) {
sunyiming	1:6465a3f5c58a	1987	LCPDEBUG(LOG_WARNING, ("lcp: received short Echo-Reply, length %d\n", len));
sunyiming	1:6465a3f5c58a	1988	return;
sunyiming	1:6465a3f5c58a	1989	}
sunyiming	1:6465a3f5c58a	1990	GETLONG(magic, inp);
sunyiming	1:6465a3f5c58a	1991	if (lcp_gotoptions[f->unit].neg_magicnumber && magic == lcp_gotoptions[f->unit].magicnumber) {
sunyiming	1:6465a3f5c58a	1992	LCPDEBUG(LOG_WARNING, ("appear to have received our own echo-reply!\n"));
sunyiming	1:6465a3f5c58a	1993	return;
sunyiming	1:6465a3f5c58a	1994	}
sunyiming	1:6465a3f5c58a	1995
sunyiming	1:6465a3f5c58a	1996	/* Reset the number of outstanding echo frames */
sunyiming	1:6465a3f5c58a	1997	lcp_echos_pending = 0;
sunyiming	1:6465a3f5c58a	1998	}
sunyiming	1:6465a3f5c58a	1999
sunyiming	1:6465a3f5c58a	2000	/*
sunyiming	1:6465a3f5c58a	2001	* LcpSendEchoRequest - Send an echo request frame to the peer
sunyiming	1:6465a3f5c58a	2002	*/
sunyiming	1:6465a3f5c58a	2003	static void
sunyiming	1:6465a3f5c58a	2004	LcpSendEchoRequest (fsm *f)
sunyiming	1:6465a3f5c58a	2005	{
sunyiming	1:6465a3f5c58a	2006	u32_t lcp_magic;
sunyiming	1:6465a3f5c58a	2007	u_char pkt[4], *pktp;
sunyiming	1:6465a3f5c58a	2008
sunyiming	1:6465a3f5c58a	2009	/*
sunyiming	1:6465a3f5c58a	2010	* Detect the failure of the peer at this point.
sunyiming	1:6465a3f5c58a	2011	*/
sunyiming	1:6465a3f5c58a	2012	if (lcp_echo_fails != 0) {
sunyiming	1:6465a3f5c58a	2013	if (lcp_echos_pending >= lcp_echo_fails) {
sunyiming	1:6465a3f5c58a	2014	LcpLinkFailure(f);
sunyiming	1:6465a3f5c58a	2015	lcp_echos_pending = 0;
sunyiming	1:6465a3f5c58a	2016	}
sunyiming	1:6465a3f5c58a	2017	}
sunyiming	1:6465a3f5c58a	2018
sunyiming	1:6465a3f5c58a	2019	/*
sunyiming	1:6465a3f5c58a	2020	* Make and send the echo request frame.
sunyiming	1:6465a3f5c58a	2021	*/
sunyiming	1:6465a3f5c58a	2022	if (f->state == LS_OPENED) {
sunyiming	1:6465a3f5c58a	2023	lcp_magic = lcp_gotoptions[f->unit].magicnumber;
sunyiming	1:6465a3f5c58a	2024	pktp = pkt;
sunyiming	1:6465a3f5c58a	2025	PUTLONG(lcp_magic, pktp);
sunyiming	1:6465a3f5c58a	2026	fsm_sdata(f, ECHOREQ, (u_char)(lcp_echo_number++ & 0xFF), pkt, (int)(pktp - pkt));
sunyiming	1:6465a3f5c58a	2027	++lcp_echos_pending;
sunyiming	1:6465a3f5c58a	2028	}
sunyiming	1:6465a3f5c58a	2029	}
sunyiming	1:6465a3f5c58a	2030
sunyiming	1:6465a3f5c58a	2031	/*
sunyiming	1:6465a3f5c58a	2032	* lcp_echo_lowerup - Start the timer for the LCP frame
sunyiming	1:6465a3f5c58a	2033	*/
sunyiming	1:6465a3f5c58a	2034
sunyiming	1:6465a3f5c58a	2035	static void
sunyiming	1:6465a3f5c58a	2036	lcp_echo_lowerup (int unit)
sunyiming	1:6465a3f5c58a	2037	{
sunyiming	1:6465a3f5c58a	2038	fsm *f = &lcp_fsm[unit];
sunyiming	1:6465a3f5c58a	2039
sunyiming	1:6465a3f5c58a	2040	/* Clear the parameters for generating echo frames */
sunyiming	1:6465a3f5c58a	2041	lcp_echos_pending = 0;
sunyiming	1:6465a3f5c58a	2042	lcp_echo_number = 0;
sunyiming	1:6465a3f5c58a	2043	lcp_echo_timer_running = 0;
sunyiming	1:6465a3f5c58a	2044
sunyiming	1:6465a3f5c58a	2045	/* If a timeout interval is specified then start the timer */
sunyiming	1:6465a3f5c58a	2046	if (lcp_echo_interval != 0) {
sunyiming	1:6465a3f5c58a	2047	LcpEchoCheck (f);
sunyiming	1:6465a3f5c58a	2048	}
sunyiming	1:6465a3f5c58a	2049	}
sunyiming	1:6465a3f5c58a	2050
sunyiming	1:6465a3f5c58a	2051	/*
sunyiming	1:6465a3f5c58a	2052	* lcp_echo_lowerdown - Stop the timer for the LCP frame
sunyiming	1:6465a3f5c58a	2053	*/
sunyiming	1:6465a3f5c58a	2054
sunyiming	1:6465a3f5c58a	2055	static void
sunyiming	1:6465a3f5c58a	2056	lcp_echo_lowerdown (int unit)
sunyiming	1:6465a3f5c58a	2057	{
sunyiming	1:6465a3f5c58a	2058	fsm *f = &lcp_fsm[unit];
sunyiming	1:6465a3f5c58a	2059
sunyiming	1:6465a3f5c58a	2060	if (lcp_echo_timer_running != 0) {
sunyiming	1:6465a3f5c58a	2061	UNTIMEOUT (LcpEchoTimeout, f);
sunyiming	1:6465a3f5c58a	2062	lcp_echo_timer_running = 0;
sunyiming	1:6465a3f5c58a	2063	}
sunyiming	1:6465a3f5c58a	2064	}
sunyiming	1:6465a3f5c58a	2065
sunyiming	1:6465a3f5c58a	2066	#endif /* PPP_SUPPORT */

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	05 Mar 2018
Imports:	0
Forks:	0
Commits:	2
Dependents:	0
Dependencies:	4
Followers:	1

EthernetInterface/lwip/netif/ppp/lcp.c@1:6465a3f5c58a, 2018-03-06 (annotated)

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