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NetStack/lwip/netif/ppp/ipcp.c@0:1a61c61d0845, 2012-04-03 (annotated)

Committer:: dcoban
Date:: Tue Apr 03 18:43:13 2012 +0000
Revision:: 0:1a61c61d0845

Who changed what in which revision?

User	Revision	Line number	New contents of line
dcoban	0:1a61c61d0845	1	/** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
dcoban	0:1a61c61d0845	2	dial-on-demand has been stripped. */
dcoban	0:1a61c61d0845	3	/*****************************************************************************
dcoban	0:1a61c61d0845	4	* ipcp.c - Network PPP IP Control Protocol program file.
dcoban	0:1a61c61d0845	5	*
dcoban	0:1a61c61d0845	6	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
dcoban	0:1a61c61d0845	7	* portions Copyright (c) 1997 by Global Election Systems Inc.
dcoban	0:1a61c61d0845	8	*
dcoban	0:1a61c61d0845	9	* The authors hereby grant permission to use, copy, modify, distribute,
dcoban	0:1a61c61d0845	10	* and license this software and its documentation for any purpose, provided
dcoban	0:1a61c61d0845	11	* that existing copyright notices are retained in all copies and that this
dcoban	0:1a61c61d0845	12	* notice and the following disclaimer are included verbatim in any
dcoban	0:1a61c61d0845	13	* distributions. No written agreement, license, or royalty fee is required
dcoban	0:1a61c61d0845	14	* for any of the authorized uses.
dcoban	0:1a61c61d0845	15	*
dcoban	0:1a61c61d0845	16	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
dcoban	0:1a61c61d0845	17	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
dcoban	0:1a61c61d0845	18	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
dcoban	0:1a61c61d0845	19	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
dcoban	0:1a61c61d0845	20	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
dcoban	0:1a61c61d0845	21	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
dcoban	0:1a61c61d0845	22	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
dcoban	0:1a61c61d0845	23	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
dcoban	0:1a61c61d0845	24	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
dcoban	0:1a61c61d0845	25	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
dcoban	0:1a61c61d0845	26	*
dcoban	0:1a61c61d0845	27	******************************************************************************
dcoban	0:1a61c61d0845	28	* REVISION HISTORY
dcoban	0:1a61c61d0845	29	*
dcoban	0:1a61c61d0845	30	* 03-01-01 Marc Boucher <marc@mbsi.ca>
dcoban	0:1a61c61d0845	31	* Ported to lwIP.
dcoban	0:1a61c61d0845	32	* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
dcoban	0:1a61c61d0845	33	* Original.
dcoban	0:1a61c61d0845	34	*****************************************************************************/
dcoban	0:1a61c61d0845	35	/*
dcoban	0:1a61c61d0845	36	* ipcp.c - PPP IP Control Protocol.
dcoban	0:1a61c61d0845	37	*
dcoban	0:1a61c61d0845	38	* Copyright (c) 1989 Carnegie Mellon University.
dcoban	0:1a61c61d0845	39	* All rights reserved.
dcoban	0:1a61c61d0845	40	*
dcoban	0:1a61c61d0845	41	* Redistribution and use in source and binary forms are permitted
dcoban	0:1a61c61d0845	42	* provided that the above copyright notice and this paragraph are
dcoban	0:1a61c61d0845	43	* duplicated in all such forms and that any documentation,
dcoban	0:1a61c61d0845	44	* advertising materials, and other materials related to such
dcoban	0:1a61c61d0845	45	* distribution and use acknowledge that the software was developed
dcoban	0:1a61c61d0845	46	* by Carnegie Mellon University. The name of the
dcoban	0:1a61c61d0845	47	* University may not be used to endorse or promote products derived
dcoban	0:1a61c61d0845	48	* from this software without specific prior written permission.
dcoban	0:1a61c61d0845	49	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
dcoban	0:1a61c61d0845	50	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
dcoban	0:1a61c61d0845	51	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
dcoban	0:1a61c61d0845	52	*/
dcoban	0:1a61c61d0845	53
dcoban	0:1a61c61d0845	54	#include "lwip/opt.h"
dcoban	0:1a61c61d0845	55
dcoban	0:1a61c61d0845	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
dcoban	0:1a61c61d0845	57
dcoban	0:1a61c61d0845	58	#include "ppp.h"
dcoban	0:1a61c61d0845	59	#include "pppdebug.h"
dcoban	0:1a61c61d0845	60
dcoban	0:1a61c61d0845	61	#include "auth.h"
dcoban	0:1a61c61d0845	62	#include "fsm.h"
dcoban	0:1a61c61d0845	63	#include "vj.h"
dcoban	0:1a61c61d0845	64	#include "ipcp.h"
dcoban	0:1a61c61d0845	65
dcoban	0:1a61c61d0845	66	#include "lwip/inet.h"
dcoban	0:1a61c61d0845	67
dcoban	0:1a61c61d0845	68	#include <string.h>
dcoban	0:1a61c61d0845	69
dcoban	0:1a61c61d0845	70	/* #define OLD_CI_ADDRS 1 / / Support deprecated address negotiation. */
dcoban	0:1a61c61d0845	71
dcoban	0:1a61c61d0845	72	/* global vars */
dcoban	0:1a61c61d0845	73	ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
dcoban	0:1a61c61d0845	74	ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
dcoban	0:1a61c61d0845	75	ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
dcoban	0:1a61c61d0845	76	ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
dcoban	0:1a61c61d0845	77
dcoban	0:1a61c61d0845	78	/* local vars */
dcoban	0:1a61c61d0845	79	static int default_route_set[NUM_PPP]; /* Have set up a default route */
dcoban	0:1a61c61d0845	80	static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
dcoban	0:1a61c61d0845	81
dcoban	0:1a61c61d0845	82
dcoban	0:1a61c61d0845	83	/*
dcoban	0:1a61c61d0845	84	* Callbacks for fsm code. (CI = Configuration Information)
dcoban	0:1a61c61d0845	85	*/
dcoban	0:1a61c61d0845	86	static void ipcp_resetci (fsm ); / Reset our CI */
dcoban	0:1a61c61d0845	87	static int ipcp_cilen (fsm ); / Return length of our CI */
dcoban	0:1a61c61d0845	88	static void ipcp_addci (fsm , u_char , int ); / Add our CI */
dcoban	0:1a61c61d0845	89	static int ipcp_ackci (fsm , u_char , int); /* Peer ack'd our CI */
dcoban	0:1a61c61d0845	90	static int ipcp_nakci (fsm , u_char , int); /* Peer nak'd our CI */
dcoban	0:1a61c61d0845	91	static int ipcp_rejci (fsm , u_char , int); /* Peer rej'd our CI */
dcoban	0:1a61c61d0845	92	static int ipcp_reqci (fsm , u_char , int , int); / Rcv CI */
dcoban	0:1a61c61d0845	93	static void ipcp_up (fsm ); / We're UP */
dcoban	0:1a61c61d0845	94	static void ipcp_down (fsm ); / We're DOWN */
dcoban	0:1a61c61d0845	95	#if PPP_ADDITIONAL_CALLBACKS
dcoban	0:1a61c61d0845	96	static void ipcp_script (fsm , char ); /* Run an up/down script */
dcoban	0:1a61c61d0845	97	#endif
dcoban	0:1a61c61d0845	98	static void ipcp_finished (fsm ); / Don't need lower layer */
dcoban	0:1a61c61d0845	99
dcoban	0:1a61c61d0845	100
dcoban	0:1a61c61d0845	101	fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
dcoban	0:1a61c61d0845	102
dcoban	0:1a61c61d0845	103
dcoban	0:1a61c61d0845	104	static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
dcoban	0:1a61c61d0845	105	ipcp_resetci, /* Reset our Configuration Information */
dcoban	0:1a61c61d0845	106	ipcp_cilen, /* Length of our Configuration Information */
dcoban	0:1a61c61d0845	107	ipcp_addci, /* Add our Configuration Information */
dcoban	0:1a61c61d0845	108	ipcp_ackci, /* ACK our Configuration Information */
dcoban	0:1a61c61d0845	109	ipcp_nakci, /* NAK our Configuration Information */
dcoban	0:1a61c61d0845	110	ipcp_rejci, /* Reject our Configuration Information */
dcoban	0:1a61c61d0845	111	ipcp_reqci, /* Request peer's Configuration Information */
dcoban	0:1a61c61d0845	112	ipcp_up, /* Called when fsm reaches LS_OPENED state */
dcoban	0:1a61c61d0845	113	ipcp_down, /* Called when fsm leaves LS_OPENED state */
dcoban	0:1a61c61d0845	114	NULL, /* Called when we want the lower layer up */
dcoban	0:1a61c61d0845	115	ipcp_finished, /* Called when we want the lower layer down */
dcoban	0:1a61c61d0845	116	NULL, /* Called when Protocol-Reject received */
dcoban	0:1a61c61d0845	117	NULL, /* Retransmission is necessary */
dcoban	0:1a61c61d0845	118	NULL, /* Called to handle protocol-specific codes */
dcoban	0:1a61c61d0845	119	"IPCP" /* String name of protocol */
dcoban	0:1a61c61d0845	120	};
dcoban	0:1a61c61d0845	121
dcoban	0:1a61c61d0845	122	/*
dcoban	0:1a61c61d0845	123	* Protocol entry points from main code.
dcoban	0:1a61c61d0845	124	*/
dcoban	0:1a61c61d0845	125	static void ipcp_init (int);
dcoban	0:1a61c61d0845	126	static void ipcp_open (int);
dcoban	0:1a61c61d0845	127	static void ipcp_close (int, char *);
dcoban	0:1a61c61d0845	128	static void ipcp_lowerup (int);
dcoban	0:1a61c61d0845	129	static void ipcp_lowerdown (int);
dcoban	0:1a61c61d0845	130	static void ipcp_input (int, u_char *, int);
dcoban	0:1a61c61d0845	131	static void ipcp_protrej (int);
dcoban	0:1a61c61d0845	132
dcoban	0:1a61c61d0845	133
dcoban	0:1a61c61d0845	134	struct protent ipcp_protent = {
dcoban	0:1a61c61d0845	135	PPP_IPCP,
dcoban	0:1a61c61d0845	136	ipcp_init,
dcoban	0:1a61c61d0845	137	ipcp_input,
dcoban	0:1a61c61d0845	138	ipcp_protrej,
dcoban	0:1a61c61d0845	139	ipcp_lowerup,
dcoban	0:1a61c61d0845	140	ipcp_lowerdown,
dcoban	0:1a61c61d0845	141	ipcp_open,
dcoban	0:1a61c61d0845	142	ipcp_close,
dcoban	0:1a61c61d0845	143	#if PPP_ADDITIONAL_CALLBACKS
dcoban	0:1a61c61d0845	144	ipcp_printpkt,
dcoban	0:1a61c61d0845	145	NULL,
dcoban	0:1a61c61d0845	146	#endif /* PPP_ADDITIONAL_CALLBACKS */
dcoban	0:1a61c61d0845	147	1,
dcoban	0:1a61c61d0845	148	"IPCP",
dcoban	0:1a61c61d0845	149	#if PPP_ADDITIONAL_CALLBACKS
dcoban	0:1a61c61d0845	150	ip_check_options,
dcoban	0:1a61c61d0845	151	NULL,
dcoban	0:1a61c61d0845	152	ip_active_pkt
dcoban	0:1a61c61d0845	153	#endif /* PPP_ADDITIONAL_CALLBACKS */
dcoban	0:1a61c61d0845	154	};
dcoban	0:1a61c61d0845	155
dcoban	0:1a61c61d0845	156	static void ipcp_clear_addrs (int);
dcoban	0:1a61c61d0845	157
dcoban	0:1a61c61d0845	158	/*
dcoban	0:1a61c61d0845	159	* Lengths of configuration options.
dcoban	0:1a61c61d0845	160	*/
dcoban	0:1a61c61d0845	161	#define CILEN_VOID 2
dcoban	0:1a61c61d0845	162	#define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
dcoban	0:1a61c61d0845	163	#define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
dcoban	0:1a61c61d0845	164	#define CILEN_ADDR 6 /* new-style single address option */
dcoban	0:1a61c61d0845	165	#define CILEN_ADDRS 10 /* old-style dual address option */
dcoban	0:1a61c61d0845	166
dcoban	0:1a61c61d0845	167
dcoban	0:1a61c61d0845	168	#define CODENAME(x) ((x) == CONFACK ? "ACK" : \
dcoban	0:1a61c61d0845	169	(x) == CONFNAK ? "NAK" : "REJ")
dcoban	0:1a61c61d0845	170
dcoban	0:1a61c61d0845	171
dcoban	0:1a61c61d0845	172	/*
dcoban	0:1a61c61d0845	173	* ipcp_init - Initialize IPCP.
dcoban	0:1a61c61d0845	174	*/
dcoban	0:1a61c61d0845	175	static void
dcoban	0:1a61c61d0845	176	ipcp_init(int unit)
dcoban	0:1a61c61d0845	177	{
dcoban	0:1a61c61d0845	178	fsm *f = &ipcp_fsm[unit];
dcoban	0:1a61c61d0845	179	ipcp_options *wo = &ipcp_wantoptions[unit];
dcoban	0:1a61c61d0845	180	ipcp_options *ao = &ipcp_allowoptions[unit];
dcoban	0:1a61c61d0845	181
dcoban	0:1a61c61d0845	182	f->unit = unit;
dcoban	0:1a61c61d0845	183	f->protocol = PPP_IPCP;
dcoban	0:1a61c61d0845	184	f->callbacks = &ipcp_callbacks;
dcoban	0:1a61c61d0845	185	fsm_init(&ipcp_fsm[unit]);
dcoban	0:1a61c61d0845	186
dcoban	0:1a61c61d0845	187	memset(wo, 0, sizeof(*wo));
dcoban	0:1a61c61d0845	188	memset(ao, 0, sizeof(*ao));
dcoban	0:1a61c61d0845	189
dcoban	0:1a61c61d0845	190	wo->neg_addr = 1;
dcoban	0:1a61c61d0845	191	wo->ouraddr = 0;
dcoban	0:1a61c61d0845	192	#if VJ_SUPPORT
dcoban	0:1a61c61d0845	193	wo->neg_vj = 1;
dcoban	0:1a61c61d0845	194	#else /* VJ_SUPPORT */
dcoban	0:1a61c61d0845	195	wo->neg_vj = 0;
dcoban	0:1a61c61d0845	196	#endif /* VJ_SUPPORT */
dcoban	0:1a61c61d0845	197	wo->vj_protocol = IPCP_VJ_COMP;
dcoban	0:1a61c61d0845	198	wo->maxslotindex = MAX_SLOTS - 1;
dcoban	0:1a61c61d0845	199	wo->cflag = 0;
dcoban	0:1a61c61d0845	200	wo->default_route = 1;
dcoban	0:1a61c61d0845	201
dcoban	0:1a61c61d0845	202	ao->neg_addr = 1;
dcoban	0:1a61c61d0845	203	#if VJ_SUPPORT
dcoban	0:1a61c61d0845	204	ao->neg_vj = 1;
dcoban	0:1a61c61d0845	205	#else /* VJ_SUPPORT */
dcoban	0:1a61c61d0845	206	ao->neg_vj = 0;
dcoban	0:1a61c61d0845	207	#endif /* VJ_SUPPORT */
dcoban	0:1a61c61d0845	208	ao->maxslotindex = MAX_SLOTS - 1;
dcoban	0:1a61c61d0845	209	ao->cflag = 1;
dcoban	0:1a61c61d0845	210	ao->default_route = 1;
dcoban	0:1a61c61d0845	211	}
dcoban	0:1a61c61d0845	212
dcoban	0:1a61c61d0845	213
dcoban	0:1a61c61d0845	214	/*
dcoban	0:1a61c61d0845	215	* ipcp_open - IPCP is allowed to come up.
dcoban	0:1a61c61d0845	216	*/
dcoban	0:1a61c61d0845	217	static void
dcoban	0:1a61c61d0845	218	ipcp_open(int unit)
dcoban	0:1a61c61d0845	219	{
dcoban	0:1a61c61d0845	220	fsm_open(&ipcp_fsm[unit]);
dcoban	0:1a61c61d0845	221	}
dcoban	0:1a61c61d0845	222
dcoban	0:1a61c61d0845	223
dcoban	0:1a61c61d0845	224	/*
dcoban	0:1a61c61d0845	225	* ipcp_close - Take IPCP down.
dcoban	0:1a61c61d0845	226	*/
dcoban	0:1a61c61d0845	227	static void
dcoban	0:1a61c61d0845	228	ipcp_close(int unit, char *reason)
dcoban	0:1a61c61d0845	229	{
dcoban	0:1a61c61d0845	230	fsm_close(&ipcp_fsm[unit], reason);
dcoban	0:1a61c61d0845	231	}
dcoban	0:1a61c61d0845	232
dcoban	0:1a61c61d0845	233
dcoban	0:1a61c61d0845	234	/*
dcoban	0:1a61c61d0845	235	* ipcp_lowerup - The lower layer is up.
dcoban	0:1a61c61d0845	236	*/
dcoban	0:1a61c61d0845	237	static void
dcoban	0:1a61c61d0845	238	ipcp_lowerup(int unit)
dcoban	0:1a61c61d0845	239	{
dcoban	0:1a61c61d0845	240	fsm_lowerup(&ipcp_fsm[unit]);
dcoban	0:1a61c61d0845	241	}
dcoban	0:1a61c61d0845	242
dcoban	0:1a61c61d0845	243
dcoban	0:1a61c61d0845	244	/*
dcoban	0:1a61c61d0845	245	* ipcp_lowerdown - The lower layer is down.
dcoban	0:1a61c61d0845	246	*/
dcoban	0:1a61c61d0845	247	static void
dcoban	0:1a61c61d0845	248	ipcp_lowerdown(int unit)
dcoban	0:1a61c61d0845	249	{
dcoban	0:1a61c61d0845	250	fsm_lowerdown(&ipcp_fsm[unit]);
dcoban	0:1a61c61d0845	251	}
dcoban	0:1a61c61d0845	252
dcoban	0:1a61c61d0845	253
dcoban	0:1a61c61d0845	254	/*
dcoban	0:1a61c61d0845	255	* ipcp_input - Input IPCP packet.
dcoban	0:1a61c61d0845	256	*/
dcoban	0:1a61c61d0845	257	static void
dcoban	0:1a61c61d0845	258	ipcp_input(int unit, u_char *p, int len)
dcoban	0:1a61c61d0845	259	{
dcoban	0:1a61c61d0845	260	fsm_input(&ipcp_fsm[unit], p, len);
dcoban	0:1a61c61d0845	261	}
dcoban	0:1a61c61d0845	262
dcoban	0:1a61c61d0845	263
dcoban	0:1a61c61d0845	264	/*
dcoban	0:1a61c61d0845	265	* ipcp_protrej - A Protocol-Reject was received for IPCP.
dcoban	0:1a61c61d0845	266	*
dcoban	0:1a61c61d0845	267	* Pretend the lower layer went down, so we shut up.
dcoban	0:1a61c61d0845	268	*/
dcoban	0:1a61c61d0845	269	static void
dcoban	0:1a61c61d0845	270	ipcp_protrej(int unit)
dcoban	0:1a61c61d0845	271	{
dcoban	0:1a61c61d0845	272	fsm_lowerdown(&ipcp_fsm[unit]);
dcoban	0:1a61c61d0845	273	}
dcoban	0:1a61c61d0845	274
dcoban	0:1a61c61d0845	275
dcoban	0:1a61c61d0845	276	/*
dcoban	0:1a61c61d0845	277	* ipcp_resetci - Reset our CI.
dcoban	0:1a61c61d0845	278	*/
dcoban	0:1a61c61d0845	279	static void
dcoban	0:1a61c61d0845	280	ipcp_resetci(fsm *f)
dcoban	0:1a61c61d0845	281	{
dcoban	0:1a61c61d0845	282	ipcp_options *wo = &ipcp_wantoptions[f->unit];
dcoban	0:1a61c61d0845	283
dcoban	0:1a61c61d0845	284	wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
dcoban	0:1a61c61d0845	285	if (wo->ouraddr == 0) {
dcoban	0:1a61c61d0845	286	wo->accept_local = 1;
dcoban	0:1a61c61d0845	287	}
dcoban	0:1a61c61d0845	288	if (wo->hisaddr == 0) {
dcoban	0:1a61c61d0845	289	wo->accept_remote = 1;
dcoban	0:1a61c61d0845	290	}
dcoban	0:1a61c61d0845	291	/* Request DNS addresses from the peer */
dcoban	0:1a61c61d0845	292	wo->req_dns1 = ppp_settings.usepeerdns;
dcoban	0:1a61c61d0845	293	wo->req_dns2 = ppp_settings.usepeerdns;
dcoban	0:1a61c61d0845	294	ipcp_gotoptions[f->unit] = *wo;
dcoban	0:1a61c61d0845	295	cis_received[f->unit] = 0;
dcoban	0:1a61c61d0845	296	}
dcoban	0:1a61c61d0845	297
dcoban	0:1a61c61d0845	298
dcoban	0:1a61c61d0845	299	/*
dcoban	0:1a61c61d0845	300	* ipcp_cilen - Return length of our CI.
dcoban	0:1a61c61d0845	301	*/
dcoban	0:1a61c61d0845	302	static int
dcoban	0:1a61c61d0845	303	ipcp_cilen(fsm *f)
dcoban	0:1a61c61d0845	304	{
dcoban	0:1a61c61d0845	305	ipcp_options *go = &ipcp_gotoptions[f->unit];
dcoban	0:1a61c61d0845	306	ipcp_options *wo = &ipcp_wantoptions[f->unit];
dcoban	0:1a61c61d0845	307	ipcp_options *ho = &ipcp_hisoptions[f->unit];
dcoban	0:1a61c61d0845	308
dcoban	0:1a61c61d0845	309	#define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
dcoban	0:1a61c61d0845	310	#define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
dcoban	0:1a61c61d0845	311	#define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
dcoban	0:1a61c61d0845	312
dcoban	0:1a61c61d0845	313	/*
dcoban	0:1a61c61d0845	314	* First see if we want to change our options to the old
dcoban	0:1a61c61d0845	315	* forms because we have received old forms from the peer.
dcoban	0:1a61c61d0845	316	*/
dcoban	0:1a61c61d0845	317	if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
dcoban	0:1a61c61d0845	318	/* use the old style of address negotiation */
dcoban	0:1a61c61d0845	319	go->neg_addr = 1;
dcoban	0:1a61c61d0845	320	go->old_addrs = 1;
dcoban	0:1a61c61d0845	321	}
dcoban	0:1a61c61d0845	322	if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
dcoban	0:1a61c61d0845	323	/* try an older style of VJ negotiation */
dcoban	0:1a61c61d0845	324	if (cis_received[f->unit] == 0) {
dcoban	0:1a61c61d0845	325	/* keep trying the new style until we see some CI from the peer */
dcoban	0:1a61c61d0845	326	go->neg_vj = 1;
dcoban	0:1a61c61d0845	327	} else {
dcoban	0:1a61c61d0845	328	/* use the old style only if the peer did */
dcoban	0:1a61c61d0845	329	if (ho->neg_vj && ho->old_vj) {
dcoban	0:1a61c61d0845	330	go->neg_vj = 1;
dcoban	0:1a61c61d0845	331	go->old_vj = 1;
dcoban	0:1a61c61d0845	332	go->vj_protocol = ho->vj_protocol;
dcoban	0:1a61c61d0845	333	}
dcoban	0:1a61c61d0845	334	}
dcoban	0:1a61c61d0845	335	}
dcoban	0:1a61c61d0845	336
dcoban	0:1a61c61d0845	337	return (LENCIADDR(go->neg_addr, go->old_addrs) +
dcoban	0:1a61c61d0845	338	LENCIVJ(go->neg_vj, go->old_vj) +
dcoban	0:1a61c61d0845	339	LENCIDNS(go->req_dns1) +
dcoban	0:1a61c61d0845	340	LENCIDNS(go->req_dns2));
dcoban	0:1a61c61d0845	341	}
dcoban	0:1a61c61d0845	342
dcoban	0:1a61c61d0845	343
dcoban	0:1a61c61d0845	344	/*
dcoban	0:1a61c61d0845	345	* ipcp_addci - Add our desired CIs to a packet.
dcoban	0:1a61c61d0845	346	*/
dcoban	0:1a61c61d0845	347	static void
dcoban	0:1a61c61d0845	348	ipcp_addci(fsm f, u_char ucp, int *lenp)
dcoban	0:1a61c61d0845	349	{
dcoban	0:1a61c61d0845	350	ipcp_options *go = &ipcp_gotoptions[f->unit];
dcoban	0:1a61c61d0845	351	int len = *lenp;
dcoban	0:1a61c61d0845	352
dcoban	0:1a61c61d0845	353	#define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
dcoban	0:1a61c61d0845	354	if (neg) { \
dcoban	0:1a61c61d0845	355	int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
dcoban	0:1a61c61d0845	356	if (len >= vjlen) { \
dcoban	0:1a61c61d0845	357	PUTCHAR(opt, ucp); \
dcoban	0:1a61c61d0845	358	PUTCHAR(vjlen, ucp); \
dcoban	0:1a61c61d0845	359	PUTSHORT(val, ucp); \
dcoban	0:1a61c61d0845	360	if (!old) { \
dcoban	0:1a61c61d0845	361	PUTCHAR(maxslotindex, ucp); \
dcoban	0:1a61c61d0845	362	PUTCHAR(cflag, ucp); \
dcoban	0:1a61c61d0845	363	} \
dcoban	0:1a61c61d0845	364	len -= vjlen; \
dcoban	0:1a61c61d0845	365	} else { \
dcoban	0:1a61c61d0845	366	neg = 0; \
dcoban	0:1a61c61d0845	367	} \
dcoban	0:1a61c61d0845	368	}
dcoban	0:1a61c61d0845	369
dcoban	0:1a61c61d0845	370	#define ADDCIADDR(opt, neg, old, val1, val2) \
dcoban	0:1a61c61d0845	371	if (neg) { \
dcoban	0:1a61c61d0845	372	int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
dcoban	0:1a61c61d0845	373	if (len >= addrlen) { \
dcoban	0:1a61c61d0845	374	u32_t l; \
dcoban	0:1a61c61d0845	375	PUTCHAR(opt, ucp); \
dcoban	0:1a61c61d0845	376	PUTCHAR(addrlen, ucp); \
dcoban	0:1a61c61d0845	377	l = ntohl(val1); \
dcoban	0:1a61c61d0845	378	PUTLONG(l, ucp); \
dcoban	0:1a61c61d0845	379	if (old) { \
dcoban	0:1a61c61d0845	380	l = ntohl(val2); \
dcoban	0:1a61c61d0845	381	PUTLONG(l, ucp); \
dcoban	0:1a61c61d0845	382	} \
dcoban	0:1a61c61d0845	383	len -= addrlen; \
dcoban	0:1a61c61d0845	384	} else { \
dcoban	0:1a61c61d0845	385	neg = 0; \
dcoban	0:1a61c61d0845	386	} \
dcoban	0:1a61c61d0845	387	}
dcoban	0:1a61c61d0845	388
dcoban	0:1a61c61d0845	389	#define ADDCIDNS(opt, neg, addr) \
dcoban	0:1a61c61d0845	390	if (neg) { \
dcoban	0:1a61c61d0845	391	if (len >= CILEN_ADDR) { \
dcoban	0:1a61c61d0845	392	u32_t l; \
dcoban	0:1a61c61d0845	393	PUTCHAR(opt, ucp); \
dcoban	0:1a61c61d0845	394	PUTCHAR(CILEN_ADDR, ucp); \
dcoban	0:1a61c61d0845	395	l = ntohl(addr); \
dcoban	0:1a61c61d0845	396	PUTLONG(l, ucp); \
dcoban	0:1a61c61d0845	397	len -= CILEN_ADDR; \
dcoban	0:1a61c61d0845	398	} else { \
dcoban	0:1a61c61d0845	399	neg = 0; \
dcoban	0:1a61c61d0845	400	} \
dcoban	0:1a61c61d0845	401	}
dcoban	0:1a61c61d0845	402
dcoban	0:1a61c61d0845	403	ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
dcoban	0:1a61c61d0845	404	go->old_addrs, go->ouraddr, go->hisaddr);
dcoban	0:1a61c61d0845	405
dcoban	0:1a61c61d0845	406	ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
dcoban	0:1a61c61d0845	407	go->maxslotindex, go->cflag);
dcoban	0:1a61c61d0845	408
dcoban	0:1a61c61d0845	409	ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
dcoban	0:1a61c61d0845	410
dcoban	0:1a61c61d0845	411	ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
dcoban	0:1a61c61d0845	412
dcoban	0:1a61c61d0845	413	*lenp -= len;
dcoban	0:1a61c61d0845	414	}
dcoban	0:1a61c61d0845	415
dcoban	0:1a61c61d0845	416
dcoban	0:1a61c61d0845	417	/*
dcoban	0:1a61c61d0845	418	* ipcp_ackci - Ack our CIs.
dcoban	0:1a61c61d0845	419	*
dcoban	0:1a61c61d0845	420	* Returns:
dcoban	0:1a61c61d0845	421	* 0 - Ack was bad.
dcoban	0:1a61c61d0845	422	* 1 - Ack was good.
dcoban	0:1a61c61d0845	423	*/
dcoban	0:1a61c61d0845	424	static int
dcoban	0:1a61c61d0845	425	ipcp_ackci(fsm f, u_char p, int len)
dcoban	0:1a61c61d0845	426	{
dcoban	0:1a61c61d0845	427	ipcp_options *go = &ipcp_gotoptions[f->unit];
dcoban	0:1a61c61d0845	428	u_short cilen, citype, cishort;
dcoban	0:1a61c61d0845	429	u32_t cilong;
dcoban	0:1a61c61d0845	430	u_char cimaxslotindex, cicflag;
dcoban	0:1a61c61d0845	431
dcoban	0:1a61c61d0845	432	/*
dcoban	0:1a61c61d0845	433	* CIs must be in exactly the same order that we sent...
dcoban	0:1a61c61d0845	434	* Check packet length and CI length at each step.
dcoban	0:1a61c61d0845	435	* If we find any deviations, then this packet is bad.
dcoban	0:1a61c61d0845	436	*/
dcoban	0:1a61c61d0845	437
dcoban	0:1a61c61d0845	438	#define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
dcoban	0:1a61c61d0845	439	if (neg) { \
dcoban	0:1a61c61d0845	440	int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
dcoban	0:1a61c61d0845	441	if ((len -= vjlen) < 0) { \
dcoban	0:1a61c61d0845	442	goto bad; \
dcoban	0:1a61c61d0845	443	} \
dcoban	0:1a61c61d0845	444	GETCHAR(citype, p); \
dcoban	0:1a61c61d0845	445	GETCHAR(cilen, p); \
dcoban	0:1a61c61d0845	446	if (cilen != vjlen \|\| \
dcoban	0:1a61c61d0845	447	citype != opt) { \
dcoban	0:1a61c61d0845	448	goto bad; \
dcoban	0:1a61c61d0845	449	} \
dcoban	0:1a61c61d0845	450	GETSHORT(cishort, p); \
dcoban	0:1a61c61d0845	451	if (cishort != val) { \
dcoban	0:1a61c61d0845	452	goto bad; \
dcoban	0:1a61c61d0845	453	} \
dcoban	0:1a61c61d0845	454	if (!old) { \
dcoban	0:1a61c61d0845	455	GETCHAR(cimaxslotindex, p); \
dcoban	0:1a61c61d0845	456	if (cimaxslotindex != maxslotindex) { \
dcoban	0:1a61c61d0845	457	goto bad; \
dcoban	0:1a61c61d0845	458	} \
dcoban	0:1a61c61d0845	459	GETCHAR(cicflag, p); \
dcoban	0:1a61c61d0845	460	if (cicflag != cflag) { \
dcoban	0:1a61c61d0845	461	goto bad; \
dcoban	0:1a61c61d0845	462	} \
dcoban	0:1a61c61d0845	463	} \
dcoban	0:1a61c61d0845	464	}
dcoban	0:1a61c61d0845	465
dcoban	0:1a61c61d0845	466	#define ACKCIADDR(opt, neg, old, val1, val2) \
dcoban	0:1a61c61d0845	467	if (neg) { \
dcoban	0:1a61c61d0845	468	int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
dcoban	0:1a61c61d0845	469	u32_t l; \
dcoban	0:1a61c61d0845	470	if ((len -= addrlen) < 0) { \
dcoban	0:1a61c61d0845	471	goto bad; \
dcoban	0:1a61c61d0845	472	} \
dcoban	0:1a61c61d0845	473	GETCHAR(citype, p); \
dcoban	0:1a61c61d0845	474	GETCHAR(cilen, p); \
dcoban	0:1a61c61d0845	475	if (cilen != addrlen \|\| \
dcoban	0:1a61c61d0845	476	citype != opt) { \
dcoban	0:1a61c61d0845	477	goto bad; \
dcoban	0:1a61c61d0845	478	} \
dcoban	0:1a61c61d0845	479	GETLONG(l, p); \
dcoban	0:1a61c61d0845	480	cilong = htonl(l); \
dcoban	0:1a61c61d0845	481	if (val1 != cilong) { \
dcoban	0:1a61c61d0845	482	goto bad; \
dcoban	0:1a61c61d0845	483	} \
dcoban	0:1a61c61d0845	484	if (old) { \
dcoban	0:1a61c61d0845	485	GETLONG(l, p); \
dcoban	0:1a61c61d0845	486	cilong = htonl(l); \
dcoban	0:1a61c61d0845	487	if (val2 != cilong) { \
dcoban	0:1a61c61d0845	488	goto bad; \
dcoban	0:1a61c61d0845	489	} \
dcoban	0:1a61c61d0845	490	} \
dcoban	0:1a61c61d0845	491	}
dcoban	0:1a61c61d0845	492
dcoban	0:1a61c61d0845	493	#define ACKCIDNS(opt, neg, addr) \
dcoban	0:1a61c61d0845	494	if (neg) { \
dcoban	0:1a61c61d0845	495	u32_t l; \
dcoban	0:1a61c61d0845	496	if ((len -= CILEN_ADDR) < 0) { \
dcoban	0:1a61c61d0845	497	goto bad; \
dcoban	0:1a61c61d0845	498	} \
dcoban	0:1a61c61d0845	499	GETCHAR(citype, p); \
dcoban	0:1a61c61d0845	500	GETCHAR(cilen, p); \
dcoban	0:1a61c61d0845	501	if (cilen != CILEN_ADDR \|\| \
dcoban	0:1a61c61d0845	502	citype != opt) { \
dcoban	0:1a61c61d0845	503	goto bad; \
dcoban	0:1a61c61d0845	504	} \
dcoban	0:1a61c61d0845	505	GETLONG(l, p); \
dcoban	0:1a61c61d0845	506	cilong = htonl(l); \
dcoban	0:1a61c61d0845	507	if (addr != cilong) { \
dcoban	0:1a61c61d0845	508	goto bad; \
dcoban	0:1a61c61d0845	509	} \
dcoban	0:1a61c61d0845	510	}
dcoban	0:1a61c61d0845	511
dcoban	0:1a61c61d0845	512	ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
dcoban	0:1a61c61d0845	513	go->old_addrs, go->ouraddr, go->hisaddr);
dcoban	0:1a61c61d0845	514
dcoban	0:1a61c61d0845	515	ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
dcoban	0:1a61c61d0845	516	go->maxslotindex, go->cflag);
dcoban	0:1a61c61d0845	517
dcoban	0:1a61c61d0845	518	ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
dcoban	0:1a61c61d0845	519
dcoban	0:1a61c61d0845	520	ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
dcoban	0:1a61c61d0845	521
dcoban	0:1a61c61d0845	522	/*
dcoban	0:1a61c61d0845	523	* If there are any remaining CIs, then this packet is bad.
dcoban	0:1a61c61d0845	524	*/
dcoban	0:1a61c61d0845	525	if (len != 0) {
dcoban	0:1a61c61d0845	526	goto bad;
dcoban	0:1a61c61d0845	527	}
dcoban	0:1a61c61d0845	528	return (1);
dcoban	0:1a61c61d0845	529
dcoban	0:1a61c61d0845	530	bad:
dcoban	0:1a61c61d0845	531	IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
dcoban	0:1a61c61d0845	532	return (0);
dcoban	0:1a61c61d0845	533	}
dcoban	0:1a61c61d0845	534
dcoban	0:1a61c61d0845	535	/*
dcoban	0:1a61c61d0845	536	* ipcp_nakci - Peer has sent a NAK for some of our CIs.
dcoban	0:1a61c61d0845	537	* This should not modify any state if the Nak is bad
dcoban	0:1a61c61d0845	538	* or if IPCP is in the LS_OPENED state.
dcoban	0:1a61c61d0845	539	*
dcoban	0:1a61c61d0845	540	* Returns:
dcoban	0:1a61c61d0845	541	* 0 - Nak was bad.
dcoban	0:1a61c61d0845	542	* 1 - Nak was good.
dcoban	0:1a61c61d0845	543	*/
dcoban	0:1a61c61d0845	544	static int
dcoban	0:1a61c61d0845	545	ipcp_nakci(fsm f, u_char p, int len)
dcoban	0:1a61c61d0845	546	{
dcoban	0:1a61c61d0845	547	ipcp_options *go = &ipcp_gotoptions[f->unit];
dcoban	0:1a61c61d0845	548	u_char cimaxslotindex, cicflag;
dcoban	0:1a61c61d0845	549	u_char citype, cilen, *next;
dcoban	0:1a61c61d0845	550	u_short cishort;
dcoban	0:1a61c61d0845	551	u32_t ciaddr1, ciaddr2, l, cidnsaddr;
dcoban	0:1a61c61d0845	552	ipcp_options no; /* options we've seen Naks for */
dcoban	0:1a61c61d0845	553	ipcp_options try; /* options to request next time */
dcoban	0:1a61c61d0845	554
dcoban	0:1a61c61d0845	555	BZERO(&no, sizeof(no));
dcoban	0:1a61c61d0845	556	try = *go;
dcoban	0:1a61c61d0845	557
dcoban	0:1a61c61d0845	558	/*
dcoban	0:1a61c61d0845	559	* Any Nak'd CIs must be in exactly the same order that we sent.
dcoban	0:1a61c61d0845	560	* Check packet length and CI length at each step.
dcoban	0:1a61c61d0845	561	* If we find any deviations, then this packet is bad.
dcoban	0:1a61c61d0845	562	*/
dcoban	0:1a61c61d0845	563	#define NAKCIADDR(opt, neg, old, code) \
dcoban	0:1a61c61d0845	564	if (go->neg && \
dcoban	0:1a61c61d0845	565	len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
dcoban	0:1a61c61d0845	566	p[1] == cilen && \
dcoban	0:1a61c61d0845	567	p[0] == opt) { \
dcoban	0:1a61c61d0845	568	len -= cilen; \
dcoban	0:1a61c61d0845	569	INCPTR(2, p); \
dcoban	0:1a61c61d0845	570	GETLONG(l, p); \
dcoban	0:1a61c61d0845	571	ciaddr1 = htonl(l); \
dcoban	0:1a61c61d0845	572	if (old) { \
dcoban	0:1a61c61d0845	573	GETLONG(l, p); \
dcoban	0:1a61c61d0845	574	ciaddr2 = htonl(l); \
dcoban	0:1a61c61d0845	575	no.old_addrs = 1; \
dcoban	0:1a61c61d0845	576	} else { \
dcoban	0:1a61c61d0845	577	ciaddr2 = 0; \
dcoban	0:1a61c61d0845	578	} \
dcoban	0:1a61c61d0845	579	no.neg = 1; \
dcoban	0:1a61c61d0845	580	code \
dcoban	0:1a61c61d0845	581	}
dcoban	0:1a61c61d0845	582
dcoban	0:1a61c61d0845	583	#define NAKCIVJ(opt, neg, code) \
dcoban	0:1a61c61d0845	584	if (go->neg && \
dcoban	0:1a61c61d0845	585	((cilen = p[1]) == CILEN_COMPRESS \|\| cilen == CILEN_VJ) && \
dcoban	0:1a61c61d0845	586	len >= cilen && \
dcoban	0:1a61c61d0845	587	p[0] == opt) { \
dcoban	0:1a61c61d0845	588	len -= cilen; \
dcoban	0:1a61c61d0845	589	INCPTR(2, p); \
dcoban	0:1a61c61d0845	590	GETSHORT(cishort, p); \
dcoban	0:1a61c61d0845	591	no.neg = 1; \
dcoban	0:1a61c61d0845	592	code \
dcoban	0:1a61c61d0845	593	}
dcoban	0:1a61c61d0845	594
dcoban	0:1a61c61d0845	595	#define NAKCIDNS(opt, neg, code) \
dcoban	0:1a61c61d0845	596	if (go->neg && \
dcoban	0:1a61c61d0845	597	((cilen = p[1]) == CILEN_ADDR) && \
dcoban	0:1a61c61d0845	598	len >= cilen && \
dcoban	0:1a61c61d0845	599	p[0] == opt) { \
dcoban	0:1a61c61d0845	600	len -= cilen; \
dcoban	0:1a61c61d0845	601	INCPTR(2, p); \
dcoban	0:1a61c61d0845	602	GETLONG(l, p); \
dcoban	0:1a61c61d0845	603	cidnsaddr = htonl(l); \
dcoban	0:1a61c61d0845	604	no.neg = 1; \
dcoban	0:1a61c61d0845	605	code \
dcoban	0:1a61c61d0845	606	}
dcoban	0:1a61c61d0845	607
dcoban	0:1a61c61d0845	608	/*
dcoban	0:1a61c61d0845	609	* Accept the peer's idea of {our,his} address, if different
dcoban	0:1a61c61d0845	610	* from our idea, only if the accept_{local,remote} flag is set.
dcoban	0:1a61c61d0845	611	*/
dcoban	0:1a61c61d0845	612	NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
dcoban	0:1a61c61d0845	613	if (go->accept_local && ciaddr1) { /* Do we know our address? */
dcoban	0:1a61c61d0845	614	try.ouraddr = ciaddr1;
dcoban	0:1a61c61d0845	615	IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
dcoban	0:1a61c61d0845	616	inet_ntoa(ciaddr1)));
dcoban	0:1a61c61d0845	617	}
dcoban	0:1a61c61d0845	618	if (go->accept_remote && ciaddr2) { /* Does he know his? */
dcoban	0:1a61c61d0845	619	try.hisaddr = ciaddr2;
dcoban	0:1a61c61d0845	620	IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
dcoban	0:1a61c61d0845	621	inet_ntoa(ciaddr2)));
dcoban	0:1a61c61d0845	622	}
dcoban	0:1a61c61d0845	623	);
dcoban	0:1a61c61d0845	624
dcoban	0:1a61c61d0845	625	/*
dcoban	0:1a61c61d0845	626	* Accept the peer's value of maxslotindex provided that it
dcoban	0:1a61c61d0845	627	* is less than what we asked for. Turn off slot-ID compression
dcoban	0:1a61c61d0845	628	* if the peer wants. Send old-style compress-type option if
dcoban	0:1a61c61d0845	629	* the peer wants.
dcoban	0:1a61c61d0845	630	*/
dcoban	0:1a61c61d0845	631	NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
dcoban	0:1a61c61d0845	632	if (cilen == CILEN_VJ) {
dcoban	0:1a61c61d0845	633	GETCHAR(cimaxslotindex, p);
dcoban	0:1a61c61d0845	634	GETCHAR(cicflag, p);
dcoban	0:1a61c61d0845	635	if (cishort == IPCP_VJ_COMP) {
dcoban	0:1a61c61d0845	636	try.old_vj = 0;
dcoban	0:1a61c61d0845	637	if (cimaxslotindex < go->maxslotindex) {
dcoban	0:1a61c61d0845	638	try.maxslotindex = cimaxslotindex;
dcoban	0:1a61c61d0845	639	}
dcoban	0:1a61c61d0845	640	if (!cicflag) {
dcoban	0:1a61c61d0845	641	try.cflag = 0;
dcoban	0:1a61c61d0845	642	}
dcoban	0:1a61c61d0845	643	} else {
dcoban	0:1a61c61d0845	644	try.neg_vj = 0;
dcoban	0:1a61c61d0845	645	}
dcoban	0:1a61c61d0845	646	} else {
dcoban	0:1a61c61d0845	647	if (cishort == IPCP_VJ_COMP \|\| cishort == IPCP_VJ_COMP_OLD) {
dcoban	0:1a61c61d0845	648	try.old_vj = 1;
dcoban	0:1a61c61d0845	649	try.vj_protocol = cishort;
dcoban	0:1a61c61d0845	650	} else {
dcoban	0:1a61c61d0845	651	try.neg_vj = 0;
dcoban	0:1a61c61d0845	652	}
dcoban	0:1a61c61d0845	653	}
dcoban	0:1a61c61d0845	654	);
dcoban	0:1a61c61d0845	655
dcoban	0:1a61c61d0845	656	NAKCIDNS(CI_MS_DNS1, req_dns1,
dcoban	0:1a61c61d0845	657	try.dnsaddr[0] = cidnsaddr;
dcoban	0:1a61c61d0845	658	IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
dcoban	0:1a61c61d0845	659	);
dcoban	0:1a61c61d0845	660
dcoban	0:1a61c61d0845	661	NAKCIDNS(CI_MS_DNS2, req_dns2,
dcoban	0:1a61c61d0845	662	try.dnsaddr[1] = cidnsaddr;
dcoban	0:1a61c61d0845	663	IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
dcoban	0:1a61c61d0845	664	);
dcoban	0:1a61c61d0845	665
dcoban	0:1a61c61d0845	666	/*
dcoban	0:1a61c61d0845	667	* There may be remaining CIs, if the peer is requesting negotiation
dcoban	0:1a61c61d0845	668	* on an option that we didn't include in our request packet.
dcoban	0:1a61c61d0845	669	* If they want to negotiate about IP addresses, we comply.
dcoban	0:1a61c61d0845	670	* If they want us to ask for compression, we refuse.
dcoban	0:1a61c61d0845	671	*/
dcoban	0:1a61c61d0845	672	while (len > CILEN_VOID) {
dcoban	0:1a61c61d0845	673	GETCHAR(citype, p);
dcoban	0:1a61c61d0845	674	GETCHAR(cilen, p);
dcoban	0:1a61c61d0845	675	if( (len -= cilen) < 0 ) {
dcoban	0:1a61c61d0845	676	goto bad;
dcoban	0:1a61c61d0845	677	}
dcoban	0:1a61c61d0845	678	next = p + cilen - 2;
dcoban	0:1a61c61d0845	679
dcoban	0:1a61c61d0845	680	switch (citype) {
dcoban	0:1a61c61d0845	681	case CI_COMPRESSTYPE:
dcoban	0:1a61c61d0845	682	if (go->neg_vj \|\| no.neg_vj \|\|
dcoban	0:1a61c61d0845	683	(cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
dcoban	0:1a61c61d0845	684	goto bad;
dcoban	0:1a61c61d0845	685	}
dcoban	0:1a61c61d0845	686	no.neg_vj = 1;
dcoban	0:1a61c61d0845	687	break;
dcoban	0:1a61c61d0845	688	case CI_ADDRS:
dcoban	0:1a61c61d0845	689	if ((go->neg_addr && go->old_addrs) \|\| no.old_addrs
dcoban	0:1a61c61d0845	690	\|\| cilen != CILEN_ADDRS) {
dcoban	0:1a61c61d0845	691	goto bad;
dcoban	0:1a61c61d0845	692	}
dcoban	0:1a61c61d0845	693	try.neg_addr = 1;
dcoban	0:1a61c61d0845	694	try.old_addrs = 1;
dcoban	0:1a61c61d0845	695	GETLONG(l, p);
dcoban	0:1a61c61d0845	696	ciaddr1 = htonl(l);
dcoban	0:1a61c61d0845	697	if (ciaddr1 && go->accept_local) {
dcoban	0:1a61c61d0845	698	try.ouraddr = ciaddr1;
dcoban	0:1a61c61d0845	699	}
dcoban	0:1a61c61d0845	700	GETLONG(l, p);
dcoban	0:1a61c61d0845	701	ciaddr2 = htonl(l);
dcoban	0:1a61c61d0845	702	if (ciaddr2 && go->accept_remote) {
dcoban	0:1a61c61d0845	703	try.hisaddr = ciaddr2;
dcoban	0:1a61c61d0845	704	}
dcoban	0:1a61c61d0845	705	no.old_addrs = 1;
dcoban	0:1a61c61d0845	706	break;
dcoban	0:1a61c61d0845	707	case CI_ADDR:
dcoban	0:1a61c61d0845	708	if (go->neg_addr \|\| no.neg_addr \|\| cilen != CILEN_ADDR) {
dcoban	0:1a61c61d0845	709	goto bad;
dcoban	0:1a61c61d0845	710	}
dcoban	0:1a61c61d0845	711	try.old_addrs = 0;
dcoban	0:1a61c61d0845	712	GETLONG(l, p);
dcoban	0:1a61c61d0845	713	ciaddr1 = htonl(l);
dcoban	0:1a61c61d0845	714	if (ciaddr1 && go->accept_local) {
dcoban	0:1a61c61d0845	715	try.ouraddr = ciaddr1;
dcoban	0:1a61c61d0845	716	}
dcoban	0:1a61c61d0845	717	if (try.ouraddr != 0) {
dcoban	0:1a61c61d0845	718	try.neg_addr = 1;
dcoban	0:1a61c61d0845	719	}
dcoban	0:1a61c61d0845	720	no.neg_addr = 1;
dcoban	0:1a61c61d0845	721	break;
dcoban	0:1a61c61d0845	722	}
dcoban	0:1a61c61d0845	723	p = next;
dcoban	0:1a61c61d0845	724	}
dcoban	0:1a61c61d0845	725
dcoban	0:1a61c61d0845	726	/* If there is still anything left, this packet is bad. */
dcoban	0:1a61c61d0845	727	if (len != 0) {
dcoban	0:1a61c61d0845	728	goto bad;
dcoban	0:1a61c61d0845	729	}
dcoban	0:1a61c61d0845	730
dcoban	0:1a61c61d0845	731	/*
dcoban	0:1a61c61d0845	732	* OK, the Nak is good. Now we can update state.
dcoban	0:1a61c61d0845	733	*/
dcoban	0:1a61c61d0845	734	if (f->state != LS_OPENED) {
dcoban	0:1a61c61d0845	735	*go = try;
dcoban	0:1a61c61d0845	736	}
dcoban	0:1a61c61d0845	737
dcoban	0:1a61c61d0845	738	return 1;
dcoban	0:1a61c61d0845	739
dcoban	0:1a61c61d0845	740	bad:
dcoban	0:1a61c61d0845	741	IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
dcoban	0:1a61c61d0845	742	return 0;
dcoban	0:1a61c61d0845	743	}
dcoban	0:1a61c61d0845	744
dcoban	0:1a61c61d0845	745
dcoban	0:1a61c61d0845	746	/*
dcoban	0:1a61c61d0845	747	* ipcp_rejci - Reject some of our CIs.
dcoban	0:1a61c61d0845	748	*/
dcoban	0:1a61c61d0845	749	static int
dcoban	0:1a61c61d0845	750	ipcp_rejci(fsm f, u_char p, int len)
dcoban	0:1a61c61d0845	751	{
dcoban	0:1a61c61d0845	752	ipcp_options *go = &ipcp_gotoptions[f->unit];
dcoban	0:1a61c61d0845	753	u_char cimaxslotindex, ciflag, cilen;
dcoban	0:1a61c61d0845	754	u_short cishort;
dcoban	0:1a61c61d0845	755	u32_t cilong;
dcoban	0:1a61c61d0845	756	ipcp_options try; /* options to request next time */
dcoban	0:1a61c61d0845	757
dcoban	0:1a61c61d0845	758	try = *go;
dcoban	0:1a61c61d0845	759	/*
dcoban	0:1a61c61d0845	760	* Any Rejected CIs must be in exactly the same order that we sent.
dcoban	0:1a61c61d0845	761	* Check packet length and CI length at each step.
dcoban	0:1a61c61d0845	762	* If we find any deviations, then this packet is bad.
dcoban	0:1a61c61d0845	763	*/
dcoban	0:1a61c61d0845	764	#define REJCIADDR(opt, neg, old, val1, val2) \
dcoban	0:1a61c61d0845	765	if (go->neg && \
dcoban	0:1a61c61d0845	766	len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
dcoban	0:1a61c61d0845	767	p[1] == cilen && \
dcoban	0:1a61c61d0845	768	p[0] == opt) { \
dcoban	0:1a61c61d0845	769	u32_t l; \
dcoban	0:1a61c61d0845	770	len -= cilen; \
dcoban	0:1a61c61d0845	771	INCPTR(2, p); \
dcoban	0:1a61c61d0845	772	GETLONG(l, p); \
dcoban	0:1a61c61d0845	773	cilong = htonl(l); \
dcoban	0:1a61c61d0845	774	/* Check rejected value. */ \
dcoban	0:1a61c61d0845	775	if (cilong != val1) { \
dcoban	0:1a61c61d0845	776	goto bad; \
dcoban	0:1a61c61d0845	777	} \
dcoban	0:1a61c61d0845	778	if (old) { \
dcoban	0:1a61c61d0845	779	GETLONG(l, p); \
dcoban	0:1a61c61d0845	780	cilong = htonl(l); \
dcoban	0:1a61c61d0845	781	/* Check rejected value. */ \
dcoban	0:1a61c61d0845	782	if (cilong != val2) { \
dcoban	0:1a61c61d0845	783	goto bad; \
dcoban	0:1a61c61d0845	784	} \
dcoban	0:1a61c61d0845	785	} \
dcoban	0:1a61c61d0845	786	try.neg = 0; \
dcoban	0:1a61c61d0845	787	}
dcoban	0:1a61c61d0845	788
dcoban	0:1a61c61d0845	789	#define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
dcoban	0:1a61c61d0845	790	if (go->neg && \
dcoban	0:1a61c61d0845	791	p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
dcoban	0:1a61c61d0845	792	len >= p[1] && \
dcoban	0:1a61c61d0845	793	p[0] == opt) { \
dcoban	0:1a61c61d0845	794	len -= p[1]; \
dcoban	0:1a61c61d0845	795	INCPTR(2, p); \
dcoban	0:1a61c61d0845	796	GETSHORT(cishort, p); \
dcoban	0:1a61c61d0845	797	/* Check rejected value. */ \
dcoban	0:1a61c61d0845	798	if (cishort != val) { \
dcoban	0:1a61c61d0845	799	goto bad; \
dcoban	0:1a61c61d0845	800	} \
dcoban	0:1a61c61d0845	801	if (!old) { \
dcoban	0:1a61c61d0845	802	GETCHAR(cimaxslotindex, p); \
dcoban	0:1a61c61d0845	803	if (cimaxslotindex != maxslot) { \
dcoban	0:1a61c61d0845	804	goto bad; \
dcoban	0:1a61c61d0845	805	} \
dcoban	0:1a61c61d0845	806	GETCHAR(ciflag, p); \
dcoban	0:1a61c61d0845	807	if (ciflag != cflag) { \
dcoban	0:1a61c61d0845	808	goto bad; \
dcoban	0:1a61c61d0845	809	} \
dcoban	0:1a61c61d0845	810	} \
dcoban	0:1a61c61d0845	811	try.neg = 0; \
dcoban	0:1a61c61d0845	812	}
dcoban	0:1a61c61d0845	813
dcoban	0:1a61c61d0845	814	#define REJCIDNS(opt, neg, dnsaddr) \
dcoban	0:1a61c61d0845	815	if (go->neg && \
dcoban	0:1a61c61d0845	816	((cilen = p[1]) == CILEN_ADDR) && \
dcoban	0:1a61c61d0845	817	len >= cilen && \
dcoban	0:1a61c61d0845	818	p[0] == opt) { \
dcoban	0:1a61c61d0845	819	u32_t l; \
dcoban	0:1a61c61d0845	820	len -= cilen; \
dcoban	0:1a61c61d0845	821	INCPTR(2, p); \
dcoban	0:1a61c61d0845	822	GETLONG(l, p); \
dcoban	0:1a61c61d0845	823	cilong = htonl(l); \
dcoban	0:1a61c61d0845	824	/* Check rejected value. */ \
dcoban	0:1a61c61d0845	825	if (cilong != dnsaddr) { \
dcoban	0:1a61c61d0845	826	goto bad; \
dcoban	0:1a61c61d0845	827	} \
dcoban	0:1a61c61d0845	828	try.neg = 0; \
dcoban	0:1a61c61d0845	829	}
dcoban	0:1a61c61d0845	830
dcoban	0:1a61c61d0845	831	REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
dcoban	0:1a61c61d0845	832	go->old_addrs, go->ouraddr, go->hisaddr);
dcoban	0:1a61c61d0845	833
dcoban	0:1a61c61d0845	834	REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
dcoban	0:1a61c61d0845	835	go->maxslotindex, go->cflag);
dcoban	0:1a61c61d0845	836
dcoban	0:1a61c61d0845	837	REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
dcoban	0:1a61c61d0845	838
dcoban	0:1a61c61d0845	839	REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
dcoban	0:1a61c61d0845	840
dcoban	0:1a61c61d0845	841	/*
dcoban	0:1a61c61d0845	842	* If there are any remaining CIs, then this packet is bad.
dcoban	0:1a61c61d0845	843	*/
dcoban	0:1a61c61d0845	844	if (len != 0) {
dcoban	0:1a61c61d0845	845	goto bad;
dcoban	0:1a61c61d0845	846	}
dcoban	0:1a61c61d0845	847	/*
dcoban	0:1a61c61d0845	848	* Now we can update state.
dcoban	0:1a61c61d0845	849	*/
dcoban	0:1a61c61d0845	850	if (f->state != LS_OPENED) {
dcoban	0:1a61c61d0845	851	*go = try;
dcoban	0:1a61c61d0845	852	}
dcoban	0:1a61c61d0845	853	return 1;
dcoban	0:1a61c61d0845	854
dcoban	0:1a61c61d0845	855	bad:
dcoban	0:1a61c61d0845	856	IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
dcoban	0:1a61c61d0845	857	return 0;
dcoban	0:1a61c61d0845	858	}
dcoban	0:1a61c61d0845	859
dcoban	0:1a61c61d0845	860
dcoban	0:1a61c61d0845	861	/*
dcoban	0:1a61c61d0845	862	* ipcp_reqci - Check the peer's requested CIs and send appropriate response.
dcoban	0:1a61c61d0845	863	*
dcoban	0:1a61c61d0845	864	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
dcoban	0:1a61c61d0845	865	* appropriately. If reject_if_disagree is non-zero, doesn't return
dcoban	0:1a61c61d0845	866	* CONFNAK; returns CONFREJ if it can't return CONFACK.
dcoban	0:1a61c61d0845	867	*/
dcoban	0:1a61c61d0845	868	static int
dcoban	0:1a61c61d0845	869	ipcp_reqci(fsm f, u_char inp/* Requested CIs /,int len/* Length of requested CIs */,int reject_if_disagree)
dcoban	0:1a61c61d0845	870	{
dcoban	0:1a61c61d0845	871	ipcp_options *wo = &ipcp_wantoptions[f->unit];
dcoban	0:1a61c61d0845	872	ipcp_options *ho = &ipcp_hisoptions[f->unit];
dcoban	0:1a61c61d0845	873	ipcp_options *ao = &ipcp_allowoptions[f->unit];
dcoban	0:1a61c61d0845	874	#ifdef OLD_CI_ADDRS
dcoban	0:1a61c61d0845	875	ipcp_options *go = &ipcp_gotoptions[f->unit];
dcoban	0:1a61c61d0845	876	#endif
dcoban	0:1a61c61d0845	877	u_char cip, next; /* Pointer to current and next CIs */
dcoban	0:1a61c61d0845	878	u_short cilen, citype; /* Parsed len, type */
dcoban	0:1a61c61d0845	879	u_short cishort; /* Parsed short value */
dcoban	0:1a61c61d0845	880	u32_t tl, ciaddr1; /* Parsed address values */
dcoban	0:1a61c61d0845	881	#ifdef OLD_CI_ADDRS
dcoban	0:1a61c61d0845	882	u32_t ciaddr2; /* Parsed address values */
dcoban	0:1a61c61d0845	883	#endif
dcoban	0:1a61c61d0845	884	int rc = CONFACK; /* Final packet return code */
dcoban	0:1a61c61d0845	885	int orc; /* Individual option return code */
dcoban	0:1a61c61d0845	886	u_char p; / Pointer to next char to parse */
dcoban	0:1a61c61d0845	887	u_char ucp = inp; / Pointer to current output char */
dcoban	0:1a61c61d0845	888	int l = len; / Length left */
dcoban	0:1a61c61d0845	889	u_char maxslotindex, cflag;
dcoban	0:1a61c61d0845	890	int d;
dcoban	0:1a61c61d0845	891
dcoban	0:1a61c61d0845	892	cis_received[f->unit] = 1;
dcoban	0:1a61c61d0845	893
dcoban	0:1a61c61d0845	894	/*
dcoban	0:1a61c61d0845	895	* Reset all his options.
dcoban	0:1a61c61d0845	896	*/
dcoban	0:1a61c61d0845	897	BZERO(ho, sizeof(*ho));
dcoban	0:1a61c61d0845	898
dcoban	0:1a61c61d0845	899	/*
dcoban	0:1a61c61d0845	900	* Process all his options.
dcoban	0:1a61c61d0845	901	*/
dcoban	0:1a61c61d0845	902	next = inp;
dcoban	0:1a61c61d0845	903	while (l) {
dcoban	0:1a61c61d0845	904	orc = CONFACK; /* Assume success */
dcoban	0:1a61c61d0845	905	cip = p = next; /* Remember begining of CI */
dcoban	0:1a61c61d0845	906	if (l < 2 \|\| /* Not enough data for CI header or */
dcoban	0:1a61c61d0845	907	p[1] < 2 \|\| /* CI length too small or */
dcoban	0:1a61c61d0845	908	p[1] > l) { /* CI length too big? */
dcoban	0:1a61c61d0845	909	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
dcoban	0:1a61c61d0845	910	orc = CONFREJ; /* Reject bad CI */
dcoban	0:1a61c61d0845	911	cilen = (u_short)l;/* Reject till end of packet */
dcoban	0:1a61c61d0845	912	l = 0; /* Don't loop again */
dcoban	0:1a61c61d0845	913	goto endswitch;
dcoban	0:1a61c61d0845	914	}
dcoban	0:1a61c61d0845	915	GETCHAR(citype, p); /* Parse CI type */
dcoban	0:1a61c61d0845	916	GETCHAR(cilen, p); /* Parse CI length */
dcoban	0:1a61c61d0845	917	l -= cilen; /* Adjust remaining length */
dcoban	0:1a61c61d0845	918	next += cilen; /* Step to next CI */
dcoban	0:1a61c61d0845	919
dcoban	0:1a61c61d0845	920	switch (citype) { /* Check CI type */
dcoban	0:1a61c61d0845	921	#ifdef OLD_CI_ADDRS /* Need to save space... */
dcoban	0:1a61c61d0845	922	case CI_ADDRS:
dcoban	0:1a61c61d0845	923	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
dcoban	0:1a61c61d0845	924	if (!ao->neg_addr \|\|
dcoban	0:1a61c61d0845	925	cilen != CILEN_ADDRS) { /* Check CI length */
dcoban	0:1a61c61d0845	926	orc = CONFREJ; /* Reject CI */
dcoban	0:1a61c61d0845	927	break;
dcoban	0:1a61c61d0845	928	}
dcoban	0:1a61c61d0845	929
dcoban	0:1a61c61d0845	930	/*
dcoban	0:1a61c61d0845	931	* If he has no address, or if we both have his address but
dcoban	0:1a61c61d0845	932	* disagree about it, then NAK it with our idea.
dcoban	0:1a61c61d0845	933	* In particular, if we don't know his address, but he does,
dcoban	0:1a61c61d0845	934	* then accept it.
dcoban	0:1a61c61d0845	935	*/
dcoban	0:1a61c61d0845	936	GETLONG(tl, p); /* Parse source address (his) */
dcoban	0:1a61c61d0845	937	ciaddr1 = htonl(tl);
dcoban	0:1a61c61d0845	938	IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
dcoban	0:1a61c61d0845	939	if (ciaddr1 != wo->hisaddr
dcoban	0:1a61c61d0845	940	&& (ciaddr1 == 0 \|\| !wo->accept_remote)) {
dcoban	0:1a61c61d0845	941	orc = CONFNAK;
dcoban	0:1a61c61d0845	942	if (!reject_if_disagree) {
dcoban	0:1a61c61d0845	943	DECPTR(sizeof(u32_t), p);
dcoban	0:1a61c61d0845	944	tl = ntohl(wo->hisaddr);
dcoban	0:1a61c61d0845	945	PUTLONG(tl, p);
dcoban	0:1a61c61d0845	946	}
dcoban	0:1a61c61d0845	947	} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
dcoban	0:1a61c61d0845	948	/*
dcoban	0:1a61c61d0845	949	* If neither we nor he knows his address, reject the option.
dcoban	0:1a61c61d0845	950	*/
dcoban	0:1a61c61d0845	951	orc = CONFREJ;
dcoban	0:1a61c61d0845	952	wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
dcoban	0:1a61c61d0845	953	break;
dcoban	0:1a61c61d0845	954	}
dcoban	0:1a61c61d0845	955
dcoban	0:1a61c61d0845	956	/*
dcoban	0:1a61c61d0845	957	* If he doesn't know our address, or if we both have our address
dcoban	0:1a61c61d0845	958	* but disagree about it, then NAK it with our idea.
dcoban	0:1a61c61d0845	959	*/
dcoban	0:1a61c61d0845	960	GETLONG(tl, p); /* Parse desination address (ours) */
dcoban	0:1a61c61d0845	961	ciaddr2 = htonl(tl);
dcoban	0:1a61c61d0845	962	IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
dcoban	0:1a61c61d0845	963	if (ciaddr2 != wo->ouraddr) {
dcoban	0:1a61c61d0845	964	if (ciaddr2 == 0 \|\| !wo->accept_local) {
dcoban	0:1a61c61d0845	965	orc = CONFNAK;
dcoban	0:1a61c61d0845	966	if (!reject_if_disagree) {
dcoban	0:1a61c61d0845	967	DECPTR(sizeof(u32_t), p);
dcoban	0:1a61c61d0845	968	tl = ntohl(wo->ouraddr);
dcoban	0:1a61c61d0845	969	PUTLONG(tl, p);
dcoban	0:1a61c61d0845	970	}
dcoban	0:1a61c61d0845	971	} else {
dcoban	0:1a61c61d0845	972	go->ouraddr = ciaddr2; /* accept peer's idea */
dcoban	0:1a61c61d0845	973	}
dcoban	0:1a61c61d0845	974	}
dcoban	0:1a61c61d0845	975
dcoban	0:1a61c61d0845	976	ho->neg_addr = 1;
dcoban	0:1a61c61d0845	977	ho->old_addrs = 1;
dcoban	0:1a61c61d0845	978	ho->hisaddr = ciaddr1;
dcoban	0:1a61c61d0845	979	ho->ouraddr = ciaddr2;
dcoban	0:1a61c61d0845	980	break;
dcoban	0:1a61c61d0845	981	#endif
dcoban	0:1a61c61d0845	982
dcoban	0:1a61c61d0845	983	case CI_ADDR:
dcoban	0:1a61c61d0845	984	if (!ao->neg_addr) {
dcoban	0:1a61c61d0845	985	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
dcoban	0:1a61c61d0845	986	orc = CONFREJ; /* Reject CI */
dcoban	0:1a61c61d0845	987	break;
dcoban	0:1a61c61d0845	988	} else if (cilen != CILEN_ADDR) { /* Check CI length */
dcoban	0:1a61c61d0845	989	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
dcoban	0:1a61c61d0845	990	orc = CONFREJ; /* Reject CI */
dcoban	0:1a61c61d0845	991	break;
dcoban	0:1a61c61d0845	992	}
dcoban	0:1a61c61d0845	993
dcoban	0:1a61c61d0845	994	/*
dcoban	0:1a61c61d0845	995	* If he has no address, or if we both have his address but
dcoban	0:1a61c61d0845	996	* disagree about it, then NAK it with our idea.
dcoban	0:1a61c61d0845	997	* In particular, if we don't know his address, but he does,
dcoban	0:1a61c61d0845	998	* then accept it.
dcoban	0:1a61c61d0845	999	*/
dcoban	0:1a61c61d0845	1000	GETLONG(tl, p); /* Parse source address (his) */
dcoban	0:1a61c61d0845	1001	ciaddr1 = htonl(tl);
dcoban	0:1a61c61d0845	1002	if (ciaddr1 != wo->hisaddr
dcoban	0:1a61c61d0845	1003	&& (ciaddr1 == 0 \|\| !wo->accept_remote)) {
dcoban	0:1a61c61d0845	1004	orc = CONFNAK;
dcoban	0:1a61c61d0845	1005	if (!reject_if_disagree) {
dcoban	0:1a61c61d0845	1006	DECPTR(sizeof(u32_t), p);
dcoban	0:1a61c61d0845	1007	tl = ntohl(wo->hisaddr);
dcoban	0:1a61c61d0845	1008	PUTLONG(tl, p);
dcoban	0:1a61c61d0845	1009	}
dcoban	0:1a61c61d0845	1010	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
dcoban	0:1a61c61d0845	1011	} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
dcoban	0:1a61c61d0845	1012	/*
dcoban	0:1a61c61d0845	1013	* Don't ACK an address of 0.0.0.0 - reject it instead.
dcoban	0:1a61c61d0845	1014	*/
dcoban	0:1a61c61d0845	1015	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
dcoban	0:1a61c61d0845	1016	orc = CONFREJ;
dcoban	0:1a61c61d0845	1017	wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
dcoban	0:1a61c61d0845	1018	break;
dcoban	0:1a61c61d0845	1019	}
dcoban	0:1a61c61d0845	1020
dcoban	0:1a61c61d0845	1021	ho->neg_addr = 1;
dcoban	0:1a61c61d0845	1022	ho->hisaddr = ciaddr1;
dcoban	0:1a61c61d0845	1023	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
dcoban	0:1a61c61d0845	1024	break;
dcoban	0:1a61c61d0845	1025
dcoban	0:1a61c61d0845	1026	case CI_MS_DNS1:
dcoban	0:1a61c61d0845	1027	case CI_MS_DNS2:
dcoban	0:1a61c61d0845	1028	/* Microsoft primary or secondary DNS request */
dcoban	0:1a61c61d0845	1029	d = citype == CI_MS_DNS2;
dcoban	0:1a61c61d0845	1030
dcoban	0:1a61c61d0845	1031	/* If we do not have a DNS address then we cannot send it */
dcoban	0:1a61c61d0845	1032	if (ao->dnsaddr[d] == 0 \|\|
dcoban	0:1a61c61d0845	1033	cilen != CILEN_ADDR) { /* Check CI length */
dcoban	0:1a61c61d0845	1034	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
dcoban	0:1a61c61d0845	1035	orc = CONFREJ; /* Reject CI */
dcoban	0:1a61c61d0845	1036	break;
dcoban	0:1a61c61d0845	1037	}
dcoban	0:1a61c61d0845	1038	GETLONG(tl, p);
dcoban	0:1a61c61d0845	1039	if (htonl(tl) != ao->dnsaddr[d]) {
dcoban	0:1a61c61d0845	1040	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
dcoban	0:1a61c61d0845	1041	d+1, inet_ntoa(tl)));
dcoban	0:1a61c61d0845	1042	DECPTR(sizeof(u32_t), p);
dcoban	0:1a61c61d0845	1043	tl = ntohl(ao->dnsaddr[d]);
dcoban	0:1a61c61d0845	1044	PUTLONG(tl, p);
dcoban	0:1a61c61d0845	1045	orc = CONFNAK;
dcoban	0:1a61c61d0845	1046	}
dcoban	0:1a61c61d0845	1047	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
dcoban	0:1a61c61d0845	1048	break;
dcoban	0:1a61c61d0845	1049
dcoban	0:1a61c61d0845	1050	case CI_MS_WINS1:
dcoban	0:1a61c61d0845	1051	case CI_MS_WINS2:
dcoban	0:1a61c61d0845	1052	/* Microsoft primary or secondary WINS request */
dcoban	0:1a61c61d0845	1053	d = citype == CI_MS_WINS2;
dcoban	0:1a61c61d0845	1054	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
dcoban	0:1a61c61d0845	1055
dcoban	0:1a61c61d0845	1056	/* If we do not have a DNS address then we cannot send it */
dcoban	0:1a61c61d0845	1057	if (ao->winsaddr[d] == 0 \|\|
dcoban	0:1a61c61d0845	1058	cilen != CILEN_ADDR) { /* Check CI length */
dcoban	0:1a61c61d0845	1059	orc = CONFREJ; /* Reject CI */
dcoban	0:1a61c61d0845	1060	break;
dcoban	0:1a61c61d0845	1061	}
dcoban	0:1a61c61d0845	1062	GETLONG(tl, p);
dcoban	0:1a61c61d0845	1063	if (htonl(tl) != ao->winsaddr[d]) {
dcoban	0:1a61c61d0845	1064	DECPTR(sizeof(u32_t), p);
dcoban	0:1a61c61d0845	1065	tl = ntohl(ao->winsaddr[d]);
dcoban	0:1a61c61d0845	1066	PUTLONG(tl, p);
dcoban	0:1a61c61d0845	1067	orc = CONFNAK;
dcoban	0:1a61c61d0845	1068	}
dcoban	0:1a61c61d0845	1069	break;
dcoban	0:1a61c61d0845	1070
dcoban	0:1a61c61d0845	1071	case CI_COMPRESSTYPE:
dcoban	0:1a61c61d0845	1072	if (!ao->neg_vj) {
dcoban	0:1a61c61d0845	1073	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
dcoban	0:1a61c61d0845	1074	orc = CONFREJ;
dcoban	0:1a61c61d0845	1075	break;
dcoban	0:1a61c61d0845	1076	} else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
dcoban	0:1a61c61d0845	1077	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
dcoban	0:1a61c61d0845	1078	orc = CONFREJ;
dcoban	0:1a61c61d0845	1079	break;
dcoban	0:1a61c61d0845	1080	}
dcoban	0:1a61c61d0845	1081	GETSHORT(cishort, p);
dcoban	0:1a61c61d0845	1082
dcoban	0:1a61c61d0845	1083	if (!(cishort == IPCP_VJ_COMP \|\|
dcoban	0:1a61c61d0845	1084	(cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
dcoban	0:1a61c61d0845	1085	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
dcoban	0:1a61c61d0845	1086	orc = CONFREJ;
dcoban	0:1a61c61d0845	1087	break;
dcoban	0:1a61c61d0845	1088	}
dcoban	0:1a61c61d0845	1089
dcoban	0:1a61c61d0845	1090	ho->neg_vj = 1;
dcoban	0:1a61c61d0845	1091	ho->vj_protocol = cishort;
dcoban	0:1a61c61d0845	1092	if (cilen == CILEN_VJ) {
dcoban	0:1a61c61d0845	1093	GETCHAR(maxslotindex, p);
dcoban	0:1a61c61d0845	1094	if (maxslotindex > ao->maxslotindex) {
dcoban	0:1a61c61d0845	1095	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
dcoban	0:1a61c61d0845	1096	orc = CONFNAK;
dcoban	0:1a61c61d0845	1097	if (!reject_if_disagree) {
dcoban	0:1a61c61d0845	1098	DECPTR(1, p);
dcoban	0:1a61c61d0845	1099	PUTCHAR(ao->maxslotindex, p);
dcoban	0:1a61c61d0845	1100	}
dcoban	0:1a61c61d0845	1101	}
dcoban	0:1a61c61d0845	1102	GETCHAR(cflag, p);
dcoban	0:1a61c61d0845	1103	if (cflag && !ao->cflag) {
dcoban	0:1a61c61d0845	1104	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
dcoban	0:1a61c61d0845	1105	orc = CONFNAK;
dcoban	0:1a61c61d0845	1106	if (!reject_if_disagree) {
dcoban	0:1a61c61d0845	1107	DECPTR(1, p);
dcoban	0:1a61c61d0845	1108	PUTCHAR(wo->cflag, p);
dcoban	0:1a61c61d0845	1109	}
dcoban	0:1a61c61d0845	1110	}
dcoban	0:1a61c61d0845	1111	ho->maxslotindex = maxslotindex;
dcoban	0:1a61c61d0845	1112	ho->cflag = cflag;
dcoban	0:1a61c61d0845	1113	} else {
dcoban	0:1a61c61d0845	1114	ho->old_vj = 1;
dcoban	0:1a61c61d0845	1115	ho->maxslotindex = MAX_SLOTS - 1;
dcoban	0:1a61c61d0845	1116	ho->cflag = 1;
dcoban	0:1a61c61d0845	1117	}
dcoban	0:1a61c61d0845	1118	IPCPDEBUG(LOG_INFO, (
dcoban	0:1a61c61d0845	1119	"ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
dcoban	0:1a61c61d0845	1120	ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
dcoban	0:1a61c61d0845	1121	break;
dcoban	0:1a61c61d0845	1122
dcoban	0:1a61c61d0845	1123	default:
dcoban	0:1a61c61d0845	1124	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
dcoban	0:1a61c61d0845	1125	orc = CONFREJ;
dcoban	0:1a61c61d0845	1126	break;
dcoban	0:1a61c61d0845	1127	}
dcoban	0:1a61c61d0845	1128
dcoban	0:1a61c61d0845	1129	endswitch:
dcoban	0:1a61c61d0845	1130	if (orc == CONFACK && /* Good CI */
dcoban	0:1a61c61d0845	1131	rc != CONFACK) { /* but prior CI wasnt? */
dcoban	0:1a61c61d0845	1132	continue; /* Don't send this one */
dcoban	0:1a61c61d0845	1133	}
dcoban	0:1a61c61d0845	1134
dcoban	0:1a61c61d0845	1135	if (orc == CONFNAK) { /* Nak this CI? */
dcoban	0:1a61c61d0845	1136	if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
dcoban	0:1a61c61d0845	1137	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
dcoban	0:1a61c61d0845	1138	orc = CONFREJ; /* Get tough if so */
dcoban	0:1a61c61d0845	1139	} else {
dcoban	0:1a61c61d0845	1140	if (rc == CONFREJ) { /* Rejecting prior CI? */
dcoban	0:1a61c61d0845	1141	continue; /* Don't send this one */
dcoban	0:1a61c61d0845	1142	}
dcoban	0:1a61c61d0845	1143	if (rc == CONFACK) { /* Ack'd all prior CIs? */
dcoban	0:1a61c61d0845	1144	rc = CONFNAK; /* Not anymore... */
dcoban	0:1a61c61d0845	1145	ucp = inp; /* Backup */
dcoban	0:1a61c61d0845	1146	}
dcoban	0:1a61c61d0845	1147	}
dcoban	0:1a61c61d0845	1148	}
dcoban	0:1a61c61d0845	1149
dcoban	0:1a61c61d0845	1150	if (orc == CONFREJ && /* Reject this CI */
dcoban	0:1a61c61d0845	1151	rc != CONFREJ) { /* but no prior ones? */
dcoban	0:1a61c61d0845	1152	rc = CONFREJ;
dcoban	0:1a61c61d0845	1153	ucp = inp; /* Backup */
dcoban	0:1a61c61d0845	1154	}
dcoban	0:1a61c61d0845	1155
dcoban	0:1a61c61d0845	1156	/* Need to move CI? */
dcoban	0:1a61c61d0845	1157	if (ucp != cip) {
dcoban	0:1a61c61d0845	1158	BCOPY(cip, ucp, cilen); /* Move it */
dcoban	0:1a61c61d0845	1159	}
dcoban	0:1a61c61d0845	1160
dcoban	0:1a61c61d0845	1161	/* Update output pointer */
dcoban	0:1a61c61d0845	1162	INCPTR(cilen, ucp);
dcoban	0:1a61c61d0845	1163	}
dcoban	0:1a61c61d0845	1164
dcoban	0:1a61c61d0845	1165	/*
dcoban	0:1a61c61d0845	1166	* If we aren't rejecting this packet, and we want to negotiate
dcoban	0:1a61c61d0845	1167	* their address, and they didn't send their address, then we
dcoban	0:1a61c61d0845	1168	* send a NAK with a CI_ADDR option appended. We assume the
dcoban	0:1a61c61d0845	1169	* input buffer is long enough that we can append the extra
dcoban	0:1a61c61d0845	1170	* option safely.
dcoban	0:1a61c61d0845	1171	*/
dcoban	0:1a61c61d0845	1172	if (rc != CONFREJ && !ho->neg_addr &&
dcoban	0:1a61c61d0845	1173	wo->req_addr && !reject_if_disagree) {
dcoban	0:1a61c61d0845	1174	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
dcoban	0:1a61c61d0845	1175	if (rc == CONFACK) {
dcoban	0:1a61c61d0845	1176	rc = CONFNAK;
dcoban	0:1a61c61d0845	1177	ucp = inp; /* reset pointer */
dcoban	0:1a61c61d0845	1178	wo->req_addr = 0; /* don't ask again */
dcoban	0:1a61c61d0845	1179	}
dcoban	0:1a61c61d0845	1180	PUTCHAR(CI_ADDR, ucp);
dcoban	0:1a61c61d0845	1181	PUTCHAR(CILEN_ADDR, ucp);
dcoban	0:1a61c61d0845	1182	tl = ntohl(wo->hisaddr);
dcoban	0:1a61c61d0845	1183	PUTLONG(tl, ucp);
dcoban	0:1a61c61d0845	1184	}
dcoban	0:1a61c61d0845	1185
dcoban	0:1a61c61d0845	1186	len = (int)(ucp - inp); / Compute output length */
dcoban	0:1a61c61d0845	1187	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
dcoban	0:1a61c61d0845	1188	return (rc); /* Return final code */
dcoban	0:1a61c61d0845	1189	}
dcoban	0:1a61c61d0845	1190
dcoban	0:1a61c61d0845	1191
dcoban	0:1a61c61d0845	1192	#if 0
dcoban	0:1a61c61d0845	1193	/*
dcoban	0:1a61c61d0845	1194	* ip_check_options - check that any IP-related options are OK,
dcoban	0:1a61c61d0845	1195	* and assign appropriate defaults.
dcoban	0:1a61c61d0845	1196	*/
dcoban	0:1a61c61d0845	1197	static void
dcoban	0:1a61c61d0845	1198	ip_check_options(u_long localAddr)
dcoban	0:1a61c61d0845	1199	{
dcoban	0:1a61c61d0845	1200	ipcp_options *wo = &ipcp_wantoptions[0];
dcoban	0:1a61c61d0845	1201
dcoban	0:1a61c61d0845	1202	/*
dcoban	0:1a61c61d0845	1203	* Load our default IP address but allow the remote host to give us
dcoban	0:1a61c61d0845	1204	* a new address.
dcoban	0:1a61c61d0845	1205	*/
dcoban	0:1a61c61d0845	1206	if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
dcoban	0:1a61c61d0845	1207	wo->accept_local = 1; /* don't insist on this default value */
dcoban	0:1a61c61d0845	1208	wo->ouraddr = htonl(localAddr);
dcoban	0:1a61c61d0845	1209	}
dcoban	0:1a61c61d0845	1210	}
dcoban	0:1a61c61d0845	1211	#endif
dcoban	0:1a61c61d0845	1212
dcoban	0:1a61c61d0845	1213
dcoban	0:1a61c61d0845	1214	/*
dcoban	0:1a61c61d0845	1215	* ipcp_up - IPCP has come UP.
dcoban	0:1a61c61d0845	1216	*
dcoban	0:1a61c61d0845	1217	* Configure the IP network interface appropriately and bring it up.
dcoban	0:1a61c61d0845	1218	*/
dcoban	0:1a61c61d0845	1219	static void
dcoban	0:1a61c61d0845	1220	ipcp_up(fsm *f)
dcoban	0:1a61c61d0845	1221	{
dcoban	0:1a61c61d0845	1222	u32_t mask;
dcoban	0:1a61c61d0845	1223	ipcp_options *ho = &ipcp_hisoptions[f->unit];
dcoban	0:1a61c61d0845	1224	ipcp_options *go = &ipcp_gotoptions[f->unit];
dcoban	0:1a61c61d0845	1225	ipcp_options *wo = &ipcp_wantoptions[f->unit];
dcoban	0:1a61c61d0845	1226
dcoban	0:1a61c61d0845	1227	np_up(f->unit, PPP_IP);
dcoban	0:1a61c61d0845	1228	IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
dcoban	0:1a61c61d0845	1229
dcoban	0:1a61c61d0845	1230	/*
dcoban	0:1a61c61d0845	1231	* We must have a non-zero IP address for both ends of the link.
dcoban	0:1a61c61d0845	1232	*/
dcoban	0:1a61c61d0845	1233	if (!ho->neg_addr) {
dcoban	0:1a61c61d0845	1234	ho->hisaddr = wo->hisaddr;
dcoban	0:1a61c61d0845	1235	}
dcoban	0:1a61c61d0845	1236	#ifdef __PPP_STRICT_IMPL__ //DG : Kludge for bad 3g providers PPP impl
dcoban	0:1a61c61d0845	1237	if (ho->hisaddr == 0) {
dcoban	0:1a61c61d0845	1238	IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
dcoban	0:1a61c61d0845	1239	ipcp_close(f->unit, "Could not determine remote IP address");
dcoban	0:1a61c61d0845	1240	return;
dcoban	0:1a61c61d0845	1241	}
dcoban	0:1a61c61d0845	1242	#endif
dcoban	0:1a61c61d0845	1243	if (go->ouraddr == 0) {
dcoban	0:1a61c61d0845	1244	IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
dcoban	0:1a61c61d0845	1245	ipcp_close(f->unit, "Could not determine local IP address");
dcoban	0:1a61c61d0845	1246	return;
dcoban	0:1a61c61d0845	1247	}
dcoban	0:1a61c61d0845	1248
dcoban	0:1a61c61d0845	1249	if (ppp_settings.usepeerdns && (go->dnsaddr[0] \|\| go->dnsaddr[1])) {
dcoban	0:1a61c61d0845	1250	/pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);/
dcoban	0:1a61c61d0845	1251	}
dcoban	0:1a61c61d0845	1252
dcoban	0:1a61c61d0845	1253	/*
dcoban	0:1a61c61d0845	1254	* Check that the peer is allowed to use the IP address it wants.
dcoban	0:1a61c61d0845	1255	*/
dcoban	0:1a61c61d0845	1256	if (!auth_ip_addr(f->unit, ho->hisaddr)) {
dcoban	0:1a61c61d0845	1257	IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
dcoban	0:1a61c61d0845	1258	inet_ntoa(ho->hisaddr)));
dcoban	0:1a61c61d0845	1259	ipcp_close(f->unit, "Unauthorized remote IP address");
dcoban	0:1a61c61d0845	1260	return;
dcoban	0:1a61c61d0845	1261	}
dcoban	0:1a61c61d0845	1262
dcoban	0:1a61c61d0845	1263	/* set tcp compression */
dcoban	0:1a61c61d0845	1264	sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
dcoban	0:1a61c61d0845	1265
dcoban	0:1a61c61d0845	1266	/*
dcoban	0:1a61c61d0845	1267	* Set IP addresses and (if specified) netmask.
dcoban	0:1a61c61d0845	1268	*/
dcoban	0:1a61c61d0845	1269	mask = GetMask(go->ouraddr);
dcoban	0:1a61c61d0845	1270
dcoban	0:1a61c61d0845	1271	if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
dcoban	0:1a61c61d0845	1272	IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
dcoban	0:1a61c61d0845	1273	ipcp_close(f->unit, "Interface configuration failed");
dcoban	0:1a61c61d0845	1274	return;
dcoban	0:1a61c61d0845	1275	}
dcoban	0:1a61c61d0845	1276
dcoban	0:1a61c61d0845	1277	/* bring the interface up for IP */
dcoban	0:1a61c61d0845	1278	if (!sifup(f->unit)) {
dcoban	0:1a61c61d0845	1279	IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
dcoban	0:1a61c61d0845	1280	ipcp_close(f->unit, "Interface configuration failed");
dcoban	0:1a61c61d0845	1281	return;
dcoban	0:1a61c61d0845	1282	}
dcoban	0:1a61c61d0845	1283
dcoban	0:1a61c61d0845	1284	sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
dcoban	0:1a61c61d0845	1285
dcoban	0:1a61c61d0845	1286	/* assign a default route through the interface if required */
dcoban	0:1a61c61d0845	1287	if (ipcp_wantoptions[f->unit].default_route) {
dcoban	0:1a61c61d0845	1288	if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
dcoban	0:1a61c61d0845	1289	default_route_set[f->unit] = 1;
dcoban	0:1a61c61d0845	1290	}
dcoban	0:1a61c61d0845	1291	}
dcoban	0:1a61c61d0845	1292
dcoban	0:1a61c61d0845	1293	IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
dcoban	0:1a61c61d0845	1294	IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
dcoban	0:1a61c61d0845	1295	if (go->dnsaddr[0]) {
dcoban	0:1a61c61d0845	1296	IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
dcoban	0:1a61c61d0845	1297	}
dcoban	0:1a61c61d0845	1298	if (go->dnsaddr[1]) {
dcoban	0:1a61c61d0845	1299	IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
dcoban	0:1a61c61d0845	1300	}
dcoban	0:1a61c61d0845	1301	}
dcoban	0:1a61c61d0845	1302
dcoban	0:1a61c61d0845	1303
dcoban	0:1a61c61d0845	1304	/*
dcoban	0:1a61c61d0845	1305	* ipcp_down - IPCP has gone DOWN.
dcoban	0:1a61c61d0845	1306	*
dcoban	0:1a61c61d0845	1307	* Take the IP network interface down, clear its addresses
dcoban	0:1a61c61d0845	1308	* and delete routes through it.
dcoban	0:1a61c61d0845	1309	*/
dcoban	0:1a61c61d0845	1310	static void
dcoban	0:1a61c61d0845	1311	ipcp_down(fsm *f)
dcoban	0:1a61c61d0845	1312	{
dcoban	0:1a61c61d0845	1313	IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
dcoban	0:1a61c61d0845	1314	np_down(f->unit, PPP_IP);
dcoban	0:1a61c61d0845	1315	sifvjcomp(f->unit, 0, 0, 0);
dcoban	0:1a61c61d0845	1316
dcoban	0:1a61c61d0845	1317	sifdown(f->unit);
dcoban	0:1a61c61d0845	1318	ipcp_clear_addrs(f->unit);
dcoban	0:1a61c61d0845	1319	}
dcoban	0:1a61c61d0845	1320
dcoban	0:1a61c61d0845	1321
dcoban	0:1a61c61d0845	1322	/*
dcoban	0:1a61c61d0845	1323	* ipcp_clear_addrs() - clear the interface addresses, routes, etc.
dcoban	0:1a61c61d0845	1324	*/
dcoban	0:1a61c61d0845	1325	static void
dcoban	0:1a61c61d0845	1326	ipcp_clear_addrs(int unit)
dcoban	0:1a61c61d0845	1327	{
dcoban	0:1a61c61d0845	1328	u32_t ouraddr, hisaddr;
dcoban	0:1a61c61d0845	1329
dcoban	0:1a61c61d0845	1330	ouraddr = ipcp_gotoptions[unit].ouraddr;
dcoban	0:1a61c61d0845	1331	hisaddr = ipcp_hisoptions[unit].hisaddr;
dcoban	0:1a61c61d0845	1332	if (default_route_set[unit]) {
dcoban	0:1a61c61d0845	1333	cifdefaultroute(unit, ouraddr, hisaddr);
dcoban	0:1a61c61d0845	1334	default_route_set[unit] = 0;
dcoban	0:1a61c61d0845	1335	}
dcoban	0:1a61c61d0845	1336	cifaddr(unit, ouraddr, hisaddr);
dcoban	0:1a61c61d0845	1337	}
dcoban	0:1a61c61d0845	1338
dcoban	0:1a61c61d0845	1339
dcoban	0:1a61c61d0845	1340	/*
dcoban	0:1a61c61d0845	1341	* ipcp_finished - possibly shut down the lower layers.
dcoban	0:1a61c61d0845	1342	*/
dcoban	0:1a61c61d0845	1343	static void
dcoban	0:1a61c61d0845	1344	ipcp_finished(fsm *f)
dcoban	0:1a61c61d0845	1345	{
dcoban	0:1a61c61d0845	1346	np_finished(f->unit, PPP_IP);
dcoban	0:1a61c61d0845	1347	}
dcoban	0:1a61c61d0845	1348
dcoban	0:1a61c61d0845	1349	#if PPP_ADDITIONAL_CALLBACKS
dcoban	0:1a61c61d0845	1350	static int
dcoban	0:1a61c61d0845	1351	ipcp_printpkt(u_char p, int plen, void (printer) (void , char , ...), void *arg)
dcoban	0:1a61c61d0845	1352	{
dcoban	0:1a61c61d0845	1353	LWIP_UNUSED_ARG(p);
dcoban	0:1a61c61d0845	1354	LWIP_UNUSED_ARG(plen);
dcoban	0:1a61c61d0845	1355	LWIP_UNUSED_ARG(printer);
dcoban	0:1a61c61d0845	1356	LWIP_UNUSED_ARG(arg);
dcoban	0:1a61c61d0845	1357	return 0;
dcoban	0:1a61c61d0845	1358	}
dcoban	0:1a61c61d0845	1359
dcoban	0:1a61c61d0845	1360	/*
dcoban	0:1a61c61d0845	1361	* ip_active_pkt - see if this IP packet is worth bringing the link up for.
dcoban	0:1a61c61d0845	1362	* We don't bring the link up for IP fragments or for TCP FIN packets
dcoban	0:1a61c61d0845	1363	* with no data.
dcoban	0:1a61c61d0845	1364	*/
dcoban	0:1a61c61d0845	1365	#define IP_HDRLEN 20 /* bytes */
dcoban	0:1a61c61d0845	1366	#define IP_OFFMASK 0x1fff
dcoban	0:1a61c61d0845	1367	#define IPPROTO_TCP 6
dcoban	0:1a61c61d0845	1368	#define TCP_HDRLEN 20
dcoban	0:1a61c61d0845	1369	#define TH_FIN 0x01
dcoban	0:1a61c61d0845	1370
dcoban	0:1a61c61d0845	1371	/*
dcoban	0:1a61c61d0845	1372	* We use these macros because the IP header may be at an odd address,
dcoban	0:1a61c61d0845	1373	* and some compilers might use word loads to get th_off or ip_hl.
dcoban	0:1a61c61d0845	1374	*/
dcoban	0:1a61c61d0845	1375
dcoban	0:1a61c61d0845	1376	#define net_short(x) (((x)[0] << 8) + (x)[1])
dcoban	0:1a61c61d0845	1377	#define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
dcoban	0:1a61c61d0845	1378	#define get_ipoff(x) net_short((unsigned char *)(x) + 6)
dcoban	0:1a61c61d0845	1379	#define get_ipproto(x) (((unsigned char *)(x))[9])
dcoban	0:1a61c61d0845	1380	#define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
dcoban	0:1a61c61d0845	1381	#define get_tcpflags(x) (((unsigned char *)(x))[13])
dcoban	0:1a61c61d0845	1382
dcoban	0:1a61c61d0845	1383	static int
dcoban	0:1a61c61d0845	1384	ip_active_pkt(u_char *pkt, int len)
dcoban	0:1a61c61d0845	1385	{
dcoban	0:1a61c61d0845	1386	u_char *tcp;
dcoban	0:1a61c61d0845	1387	int hlen;
dcoban	0:1a61c61d0845	1388
dcoban	0:1a61c61d0845	1389	len -= PPP_HDRLEN;
dcoban	0:1a61c61d0845	1390	pkt += PPP_HDRLEN;
dcoban	0:1a61c61d0845	1391	if (len < IP_HDRLEN) {
dcoban	0:1a61c61d0845	1392	return 0;
dcoban	0:1a61c61d0845	1393	}
dcoban	0:1a61c61d0845	1394	if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
dcoban	0:1a61c61d0845	1395	return 0;
dcoban	0:1a61c61d0845	1396	}
dcoban	0:1a61c61d0845	1397	if (get_ipproto(pkt) != IPPROTO_TCP) {
dcoban	0:1a61c61d0845	1398	return 1;
dcoban	0:1a61c61d0845	1399	}
dcoban	0:1a61c61d0845	1400	hlen = get_iphl(pkt) * 4;
dcoban	0:1a61c61d0845	1401	if (len < hlen + TCP_HDRLEN) {
dcoban	0:1a61c61d0845	1402	return 0;
dcoban	0:1a61c61d0845	1403	}
dcoban	0:1a61c61d0845	1404	tcp = pkt + hlen;
dcoban	0:1a61c61d0845	1405	if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
dcoban	0:1a61c61d0845	1406	return 0;
dcoban	0:1a61c61d0845	1407	}
dcoban	0:1a61c61d0845	1408	return 1;
dcoban	0:1a61c61d0845	1409	}
dcoban	0:1a61c61d0845	1410	#endif /* PPP_ADDITIONAL_CALLBACKS */
dcoban	0:1a61c61d0845	1411
dcoban	0:1a61c61d0845	1412	#endif /* PPP_SUPPORT */

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	03 Apr 2012
Imports:	2
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	4
Followers:	1

NetStack/lwip/netif/ppp/ipcp.c@0:1a61c61d0845, 2012-04-03 (annotated)

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