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Adam Green / Mbed 2 deprecated WeatherStation

Web server based weather station using Sparkfun Weather Meters.

Dependencies: FatFileSystem mbed WeatherMeters SDFileSystem

NetStack/lwip/netif/ppp/ipcp.c@0:616601bde9fb, 2012-02-23 (annotated)

Committer:: AdamGreen
Date:: Thu Feb 23 21:38:39 2012 +0000
Revision:: 0:616601bde9fb

Who changed what in which revision?

User	Revision	Line number	New contents of line
AdamGreen	0:616601bde9fb	1	/** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
AdamGreen	0:616601bde9fb	2	dial-on-demand has been stripped. */
AdamGreen	0:616601bde9fb	3	/*****************************************************************************
AdamGreen	0:616601bde9fb	4	* ipcp.c - Network PPP IP Control Protocol program file.
AdamGreen	0:616601bde9fb	5	*
AdamGreen	0:616601bde9fb	6	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
AdamGreen	0:616601bde9fb	7	* portions Copyright (c) 1997 by Global Election Systems Inc.
AdamGreen	0:616601bde9fb	8	*
AdamGreen	0:616601bde9fb	9	* The authors hereby grant permission to use, copy, modify, distribute,
AdamGreen	0:616601bde9fb	10	* and license this software and its documentation for any purpose, provided
AdamGreen	0:616601bde9fb	11	* that existing copyright notices are retained in all copies and that this
AdamGreen	0:616601bde9fb	12	* notice and the following disclaimer are included verbatim in any
AdamGreen	0:616601bde9fb	13	* distributions. No written agreement, license, or royalty fee is required
AdamGreen	0:616601bde9fb	14	* for any of the authorized uses.
AdamGreen	0:616601bde9fb	15	*
AdamGreen	0:616601bde9fb	16	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
AdamGreen	0:616601bde9fb	17	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
AdamGreen	0:616601bde9fb	18	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
AdamGreen	0:616601bde9fb	19	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
AdamGreen	0:616601bde9fb	20	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
AdamGreen	0:616601bde9fb	21	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
AdamGreen	0:616601bde9fb	22	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
AdamGreen	0:616601bde9fb	23	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
AdamGreen	0:616601bde9fb	24	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
AdamGreen	0:616601bde9fb	25	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
AdamGreen	0:616601bde9fb	26	*
AdamGreen	0:616601bde9fb	27	******************************************************************************
AdamGreen	0:616601bde9fb	28	* REVISION HISTORY
AdamGreen	0:616601bde9fb	29	*
AdamGreen	0:616601bde9fb	30	* 03-01-01 Marc Boucher <marc@mbsi.ca>
AdamGreen	0:616601bde9fb	31	* Ported to lwIP.
AdamGreen	0:616601bde9fb	32	* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
AdamGreen	0:616601bde9fb	33	* Original.
AdamGreen	0:616601bde9fb	34	*****************************************************************************/
AdamGreen	0:616601bde9fb	35	/*
AdamGreen	0:616601bde9fb	36	* ipcp.c - PPP IP Control Protocol.
AdamGreen	0:616601bde9fb	37	*
AdamGreen	0:616601bde9fb	38	* Copyright (c) 1989 Carnegie Mellon University.
AdamGreen	0:616601bde9fb	39	* All rights reserved.
AdamGreen	0:616601bde9fb	40	*
AdamGreen	0:616601bde9fb	41	* Redistribution and use in source and binary forms are permitted
AdamGreen	0:616601bde9fb	42	* provided that the above copyright notice and this paragraph are
AdamGreen	0:616601bde9fb	43	* duplicated in all such forms and that any documentation,
AdamGreen	0:616601bde9fb	44	* advertising materials, and other materials related to such
AdamGreen	0:616601bde9fb	45	* distribution and use acknowledge that the software was developed
AdamGreen	0:616601bde9fb	46	* by Carnegie Mellon University. The name of the
AdamGreen	0:616601bde9fb	47	* University may not be used to endorse or promote products derived
AdamGreen	0:616601bde9fb	48	* from this software without specific prior written permission.
AdamGreen	0:616601bde9fb	49	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
AdamGreen	0:616601bde9fb	50	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
AdamGreen	0:616601bde9fb	51	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
AdamGreen	0:616601bde9fb	52	*/
AdamGreen	0:616601bde9fb	53
AdamGreen	0:616601bde9fb	54	#include "lwip/opt.h"
AdamGreen	0:616601bde9fb	55
AdamGreen	0:616601bde9fb	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
AdamGreen	0:616601bde9fb	57
AdamGreen	0:616601bde9fb	58	#include "ppp.h"
AdamGreen	0:616601bde9fb	59	#include "pppdebug.h"
AdamGreen	0:616601bde9fb	60
AdamGreen	0:616601bde9fb	61	#include "auth.h"
AdamGreen	0:616601bde9fb	62	#include "fsm.h"
AdamGreen	0:616601bde9fb	63	#include "vj.h"
AdamGreen	0:616601bde9fb	64	#include "ipcp.h"
AdamGreen	0:616601bde9fb	65
AdamGreen	0:616601bde9fb	66	#include "lwip/inet.h"
AdamGreen	0:616601bde9fb	67
AdamGreen	0:616601bde9fb	68	#include <string.h>
AdamGreen	0:616601bde9fb	69
AdamGreen	0:616601bde9fb	70	/* #define OLD_CI_ADDRS 1 / / Support deprecated address negotiation. */
AdamGreen	0:616601bde9fb	71
AdamGreen	0:616601bde9fb	72	/* global vars */
AdamGreen	0:616601bde9fb	73	ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
AdamGreen	0:616601bde9fb	74	ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
AdamGreen	0:616601bde9fb	75	ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
AdamGreen	0:616601bde9fb	76	ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
AdamGreen	0:616601bde9fb	77
AdamGreen	0:616601bde9fb	78	/* local vars */
AdamGreen	0:616601bde9fb	79	static int default_route_set[NUM_PPP]; /* Have set up a default route */
AdamGreen	0:616601bde9fb	80	static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
AdamGreen	0:616601bde9fb	81
AdamGreen	0:616601bde9fb	82
AdamGreen	0:616601bde9fb	83	/*
AdamGreen	0:616601bde9fb	84	* Callbacks for fsm code. (CI = Configuration Information)
AdamGreen	0:616601bde9fb	85	*/
AdamGreen	0:616601bde9fb	86	static void ipcp_resetci (fsm ); / Reset our CI */
AdamGreen	0:616601bde9fb	87	static int ipcp_cilen (fsm ); / Return length of our CI */
AdamGreen	0:616601bde9fb	88	static void ipcp_addci (fsm , u_char , int ); / Add our CI */
AdamGreen	0:616601bde9fb	89	static int ipcp_ackci (fsm , u_char , int); /* Peer ack'd our CI */
AdamGreen	0:616601bde9fb	90	static int ipcp_nakci (fsm , u_char , int); /* Peer nak'd our CI */
AdamGreen	0:616601bde9fb	91	static int ipcp_rejci (fsm , u_char , int); /* Peer rej'd our CI */
AdamGreen	0:616601bde9fb	92	static int ipcp_reqci (fsm , u_char , int , int); / Rcv CI */
AdamGreen	0:616601bde9fb	93	static void ipcp_up (fsm ); / We're UP */
AdamGreen	0:616601bde9fb	94	static void ipcp_down (fsm ); / We're DOWN */
AdamGreen	0:616601bde9fb	95	#if PPP_ADDITIONAL_CALLBACKS
AdamGreen	0:616601bde9fb	96	static void ipcp_script (fsm , char ); /* Run an up/down script */
AdamGreen	0:616601bde9fb	97	#endif
AdamGreen	0:616601bde9fb	98	static void ipcp_finished (fsm ); / Don't need lower layer */
AdamGreen	0:616601bde9fb	99
AdamGreen	0:616601bde9fb	100
AdamGreen	0:616601bde9fb	101	fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
AdamGreen	0:616601bde9fb	102
AdamGreen	0:616601bde9fb	103
AdamGreen	0:616601bde9fb	104	static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
AdamGreen	0:616601bde9fb	105	ipcp_resetci, /* Reset our Configuration Information */
AdamGreen	0:616601bde9fb	106	ipcp_cilen, /* Length of our Configuration Information */
AdamGreen	0:616601bde9fb	107	ipcp_addci, /* Add our Configuration Information */
AdamGreen	0:616601bde9fb	108	ipcp_ackci, /* ACK our Configuration Information */
AdamGreen	0:616601bde9fb	109	ipcp_nakci, /* NAK our Configuration Information */
AdamGreen	0:616601bde9fb	110	ipcp_rejci, /* Reject our Configuration Information */
AdamGreen	0:616601bde9fb	111	ipcp_reqci, /* Request peer's Configuration Information */
AdamGreen	0:616601bde9fb	112	ipcp_up, /* Called when fsm reaches LS_OPENED state */
AdamGreen	0:616601bde9fb	113	ipcp_down, /* Called when fsm leaves LS_OPENED state */
AdamGreen	0:616601bde9fb	114	NULL, /* Called when we want the lower layer up */
AdamGreen	0:616601bde9fb	115	ipcp_finished, /* Called when we want the lower layer down */
AdamGreen	0:616601bde9fb	116	NULL, /* Called when Protocol-Reject received */
AdamGreen	0:616601bde9fb	117	NULL, /* Retransmission is necessary */
AdamGreen	0:616601bde9fb	118	NULL, /* Called to handle protocol-specific codes */
AdamGreen	0:616601bde9fb	119	"IPCP" /* String name of protocol */
AdamGreen	0:616601bde9fb	120	};
AdamGreen	0:616601bde9fb	121
AdamGreen	0:616601bde9fb	122	/*
AdamGreen	0:616601bde9fb	123	* Protocol entry points from main code.
AdamGreen	0:616601bde9fb	124	*/
AdamGreen	0:616601bde9fb	125	static void ipcp_init (int);
AdamGreen	0:616601bde9fb	126	static void ipcp_open (int);
AdamGreen	0:616601bde9fb	127	static void ipcp_close (int, char *);
AdamGreen	0:616601bde9fb	128	static void ipcp_lowerup (int);
AdamGreen	0:616601bde9fb	129	static void ipcp_lowerdown (int);
AdamGreen	0:616601bde9fb	130	static void ipcp_input (int, u_char *, int);
AdamGreen	0:616601bde9fb	131	static void ipcp_protrej (int);
AdamGreen	0:616601bde9fb	132
AdamGreen	0:616601bde9fb	133
AdamGreen	0:616601bde9fb	134	struct protent ipcp_protent = {
AdamGreen	0:616601bde9fb	135	PPP_IPCP,
AdamGreen	0:616601bde9fb	136	ipcp_init,
AdamGreen	0:616601bde9fb	137	ipcp_input,
AdamGreen	0:616601bde9fb	138	ipcp_protrej,
AdamGreen	0:616601bde9fb	139	ipcp_lowerup,
AdamGreen	0:616601bde9fb	140	ipcp_lowerdown,
AdamGreen	0:616601bde9fb	141	ipcp_open,
AdamGreen	0:616601bde9fb	142	ipcp_close,
AdamGreen	0:616601bde9fb	143	#if PPP_ADDITIONAL_CALLBACKS
AdamGreen	0:616601bde9fb	144	ipcp_printpkt,
AdamGreen	0:616601bde9fb	145	NULL,
AdamGreen	0:616601bde9fb	146	#endif /* PPP_ADDITIONAL_CALLBACKS */
AdamGreen	0:616601bde9fb	147	1,
AdamGreen	0:616601bde9fb	148	"IPCP",
AdamGreen	0:616601bde9fb	149	#if PPP_ADDITIONAL_CALLBACKS
AdamGreen	0:616601bde9fb	150	ip_check_options,
AdamGreen	0:616601bde9fb	151	NULL,
AdamGreen	0:616601bde9fb	152	ip_active_pkt
AdamGreen	0:616601bde9fb	153	#endif /* PPP_ADDITIONAL_CALLBACKS */
AdamGreen	0:616601bde9fb	154	};
AdamGreen	0:616601bde9fb	155
AdamGreen	0:616601bde9fb	156	static void ipcp_clear_addrs (int);
AdamGreen	0:616601bde9fb	157
AdamGreen	0:616601bde9fb	158	/*
AdamGreen	0:616601bde9fb	159	* Lengths of configuration options.
AdamGreen	0:616601bde9fb	160	*/
AdamGreen	0:616601bde9fb	161	#define CILEN_VOID 2
AdamGreen	0:616601bde9fb	162	#define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
AdamGreen	0:616601bde9fb	163	#define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
AdamGreen	0:616601bde9fb	164	#define CILEN_ADDR 6 /* new-style single address option */
AdamGreen	0:616601bde9fb	165	#define CILEN_ADDRS 10 /* old-style dual address option */
AdamGreen	0:616601bde9fb	166
AdamGreen	0:616601bde9fb	167
AdamGreen	0:616601bde9fb	168	#define CODENAME(x) ((x) == CONFACK ? "ACK" : \
AdamGreen	0:616601bde9fb	169	(x) == CONFNAK ? "NAK" : "REJ")
AdamGreen	0:616601bde9fb	170
AdamGreen	0:616601bde9fb	171
AdamGreen	0:616601bde9fb	172	/*
AdamGreen	0:616601bde9fb	173	* ipcp_init - Initialize IPCP.
AdamGreen	0:616601bde9fb	174	*/
AdamGreen	0:616601bde9fb	175	static void
AdamGreen	0:616601bde9fb	176	ipcp_init(int unit)
AdamGreen	0:616601bde9fb	177	{
AdamGreen	0:616601bde9fb	178	fsm *f = &ipcp_fsm[unit];
AdamGreen	0:616601bde9fb	179	ipcp_options *wo = &ipcp_wantoptions[unit];
AdamGreen	0:616601bde9fb	180	ipcp_options *ao = &ipcp_allowoptions[unit];
AdamGreen	0:616601bde9fb	181
AdamGreen	0:616601bde9fb	182	f->unit = unit;
AdamGreen	0:616601bde9fb	183	f->protocol = PPP_IPCP;
AdamGreen	0:616601bde9fb	184	f->callbacks = &ipcp_callbacks;
AdamGreen	0:616601bde9fb	185	fsm_init(&ipcp_fsm[unit]);
AdamGreen	0:616601bde9fb	186
AdamGreen	0:616601bde9fb	187	memset(wo, 0, sizeof(*wo));
AdamGreen	0:616601bde9fb	188	memset(ao, 0, sizeof(*ao));
AdamGreen	0:616601bde9fb	189
AdamGreen	0:616601bde9fb	190	wo->neg_addr = 1;
AdamGreen	0:616601bde9fb	191	wo->ouraddr = 0;
AdamGreen	0:616601bde9fb	192	#if VJ_SUPPORT
AdamGreen	0:616601bde9fb	193	wo->neg_vj = 1;
AdamGreen	0:616601bde9fb	194	#else /* VJ_SUPPORT */
AdamGreen	0:616601bde9fb	195	wo->neg_vj = 0;
AdamGreen	0:616601bde9fb	196	#endif /* VJ_SUPPORT */
AdamGreen	0:616601bde9fb	197	wo->vj_protocol = IPCP_VJ_COMP;
AdamGreen	0:616601bde9fb	198	wo->maxslotindex = MAX_SLOTS - 1;
AdamGreen	0:616601bde9fb	199	wo->cflag = 0;
AdamGreen	0:616601bde9fb	200	wo->default_route = 1;
AdamGreen	0:616601bde9fb	201
AdamGreen	0:616601bde9fb	202	ao->neg_addr = 1;
AdamGreen	0:616601bde9fb	203	#if VJ_SUPPORT
AdamGreen	0:616601bde9fb	204	ao->neg_vj = 1;
AdamGreen	0:616601bde9fb	205	#else /* VJ_SUPPORT */
AdamGreen	0:616601bde9fb	206	ao->neg_vj = 0;
AdamGreen	0:616601bde9fb	207	#endif /* VJ_SUPPORT */
AdamGreen	0:616601bde9fb	208	ao->maxslotindex = MAX_SLOTS - 1;
AdamGreen	0:616601bde9fb	209	ao->cflag = 1;
AdamGreen	0:616601bde9fb	210	ao->default_route = 1;
AdamGreen	0:616601bde9fb	211	}
AdamGreen	0:616601bde9fb	212
AdamGreen	0:616601bde9fb	213
AdamGreen	0:616601bde9fb	214	/*
AdamGreen	0:616601bde9fb	215	* ipcp_open - IPCP is allowed to come up.
AdamGreen	0:616601bde9fb	216	*/
AdamGreen	0:616601bde9fb	217	static void
AdamGreen	0:616601bde9fb	218	ipcp_open(int unit)
AdamGreen	0:616601bde9fb	219	{
AdamGreen	0:616601bde9fb	220	fsm_open(&ipcp_fsm[unit]);
AdamGreen	0:616601bde9fb	221	}
AdamGreen	0:616601bde9fb	222
AdamGreen	0:616601bde9fb	223
AdamGreen	0:616601bde9fb	224	/*
AdamGreen	0:616601bde9fb	225	* ipcp_close - Take IPCP down.
AdamGreen	0:616601bde9fb	226	*/
AdamGreen	0:616601bde9fb	227	static void
AdamGreen	0:616601bde9fb	228	ipcp_close(int unit, char *reason)
AdamGreen	0:616601bde9fb	229	{
AdamGreen	0:616601bde9fb	230	fsm_close(&ipcp_fsm[unit], reason);
AdamGreen	0:616601bde9fb	231	}
AdamGreen	0:616601bde9fb	232
AdamGreen	0:616601bde9fb	233
AdamGreen	0:616601bde9fb	234	/*
AdamGreen	0:616601bde9fb	235	* ipcp_lowerup - The lower layer is up.
AdamGreen	0:616601bde9fb	236	*/
AdamGreen	0:616601bde9fb	237	static void
AdamGreen	0:616601bde9fb	238	ipcp_lowerup(int unit)
AdamGreen	0:616601bde9fb	239	{
AdamGreen	0:616601bde9fb	240	fsm_lowerup(&ipcp_fsm[unit]);
AdamGreen	0:616601bde9fb	241	}
AdamGreen	0:616601bde9fb	242
AdamGreen	0:616601bde9fb	243
AdamGreen	0:616601bde9fb	244	/*
AdamGreen	0:616601bde9fb	245	* ipcp_lowerdown - The lower layer is down.
AdamGreen	0:616601bde9fb	246	*/
AdamGreen	0:616601bde9fb	247	static void
AdamGreen	0:616601bde9fb	248	ipcp_lowerdown(int unit)
AdamGreen	0:616601bde9fb	249	{
AdamGreen	0:616601bde9fb	250	fsm_lowerdown(&ipcp_fsm[unit]);
AdamGreen	0:616601bde9fb	251	}
AdamGreen	0:616601bde9fb	252
AdamGreen	0:616601bde9fb	253
AdamGreen	0:616601bde9fb	254	/*
AdamGreen	0:616601bde9fb	255	* ipcp_input - Input IPCP packet.
AdamGreen	0:616601bde9fb	256	*/
AdamGreen	0:616601bde9fb	257	static void
AdamGreen	0:616601bde9fb	258	ipcp_input(int unit, u_char *p, int len)
AdamGreen	0:616601bde9fb	259	{
AdamGreen	0:616601bde9fb	260	fsm_input(&ipcp_fsm[unit], p, len);
AdamGreen	0:616601bde9fb	261	}
AdamGreen	0:616601bde9fb	262
AdamGreen	0:616601bde9fb	263
AdamGreen	0:616601bde9fb	264	/*
AdamGreen	0:616601bde9fb	265	* ipcp_protrej - A Protocol-Reject was received for IPCP.
AdamGreen	0:616601bde9fb	266	*
AdamGreen	0:616601bde9fb	267	* Pretend the lower layer went down, so we shut up.
AdamGreen	0:616601bde9fb	268	*/
AdamGreen	0:616601bde9fb	269	static void
AdamGreen	0:616601bde9fb	270	ipcp_protrej(int unit)
AdamGreen	0:616601bde9fb	271	{
AdamGreen	0:616601bde9fb	272	fsm_lowerdown(&ipcp_fsm[unit]);
AdamGreen	0:616601bde9fb	273	}
AdamGreen	0:616601bde9fb	274
AdamGreen	0:616601bde9fb	275
AdamGreen	0:616601bde9fb	276	/*
AdamGreen	0:616601bde9fb	277	* ipcp_resetci - Reset our CI.
AdamGreen	0:616601bde9fb	278	*/
AdamGreen	0:616601bde9fb	279	static void
AdamGreen	0:616601bde9fb	280	ipcp_resetci(fsm *f)
AdamGreen	0:616601bde9fb	281	{
AdamGreen	0:616601bde9fb	282	ipcp_options *wo = &ipcp_wantoptions[f->unit];
AdamGreen	0:616601bde9fb	283
AdamGreen	0:616601bde9fb	284	wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
AdamGreen	0:616601bde9fb	285	if (wo->ouraddr == 0) {
AdamGreen	0:616601bde9fb	286	wo->accept_local = 1;
AdamGreen	0:616601bde9fb	287	}
AdamGreen	0:616601bde9fb	288	if (wo->hisaddr == 0) {
AdamGreen	0:616601bde9fb	289	wo->accept_remote = 1;
AdamGreen	0:616601bde9fb	290	}
AdamGreen	0:616601bde9fb	291	/* Request DNS addresses from the peer */
AdamGreen	0:616601bde9fb	292	wo->req_dns1 = ppp_settings.usepeerdns;
AdamGreen	0:616601bde9fb	293	wo->req_dns2 = ppp_settings.usepeerdns;
AdamGreen	0:616601bde9fb	294	ipcp_gotoptions[f->unit] = *wo;
AdamGreen	0:616601bde9fb	295	cis_received[f->unit] = 0;
AdamGreen	0:616601bde9fb	296	}
AdamGreen	0:616601bde9fb	297
AdamGreen	0:616601bde9fb	298
AdamGreen	0:616601bde9fb	299	/*
AdamGreen	0:616601bde9fb	300	* ipcp_cilen - Return length of our CI.
AdamGreen	0:616601bde9fb	301	*/
AdamGreen	0:616601bde9fb	302	static int
AdamGreen	0:616601bde9fb	303	ipcp_cilen(fsm *f)
AdamGreen	0:616601bde9fb	304	{
AdamGreen	0:616601bde9fb	305	ipcp_options *go = &ipcp_gotoptions[f->unit];
AdamGreen	0:616601bde9fb	306	ipcp_options *wo = &ipcp_wantoptions[f->unit];
AdamGreen	0:616601bde9fb	307	ipcp_options *ho = &ipcp_hisoptions[f->unit];
AdamGreen	0:616601bde9fb	308
AdamGreen	0:616601bde9fb	309	#define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
AdamGreen	0:616601bde9fb	310	#define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
AdamGreen	0:616601bde9fb	311	#define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
AdamGreen	0:616601bde9fb	312
AdamGreen	0:616601bde9fb	313	/*
AdamGreen	0:616601bde9fb	314	* First see if we want to change our options to the old
AdamGreen	0:616601bde9fb	315	* forms because we have received old forms from the peer.
AdamGreen	0:616601bde9fb	316	*/
AdamGreen	0:616601bde9fb	317	if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
AdamGreen	0:616601bde9fb	318	/* use the old style of address negotiation */
AdamGreen	0:616601bde9fb	319	go->neg_addr = 1;
AdamGreen	0:616601bde9fb	320	go->old_addrs = 1;
AdamGreen	0:616601bde9fb	321	}
AdamGreen	0:616601bde9fb	322	if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
AdamGreen	0:616601bde9fb	323	/* try an older style of VJ negotiation */
AdamGreen	0:616601bde9fb	324	if (cis_received[f->unit] == 0) {
AdamGreen	0:616601bde9fb	325	/* keep trying the new style until we see some CI from the peer */
AdamGreen	0:616601bde9fb	326	go->neg_vj = 1;
AdamGreen	0:616601bde9fb	327	} else {
AdamGreen	0:616601bde9fb	328	/* use the old style only if the peer did */
AdamGreen	0:616601bde9fb	329	if (ho->neg_vj && ho->old_vj) {
AdamGreen	0:616601bde9fb	330	go->neg_vj = 1;
AdamGreen	0:616601bde9fb	331	go->old_vj = 1;
AdamGreen	0:616601bde9fb	332	go->vj_protocol = ho->vj_protocol;
AdamGreen	0:616601bde9fb	333	}
AdamGreen	0:616601bde9fb	334	}
AdamGreen	0:616601bde9fb	335	}
AdamGreen	0:616601bde9fb	336
AdamGreen	0:616601bde9fb	337	return (LENCIADDR(go->neg_addr, go->old_addrs) +
AdamGreen	0:616601bde9fb	338	LENCIVJ(go->neg_vj, go->old_vj) +
AdamGreen	0:616601bde9fb	339	LENCIDNS(go->req_dns1) +
AdamGreen	0:616601bde9fb	340	LENCIDNS(go->req_dns2));
AdamGreen	0:616601bde9fb	341	}
AdamGreen	0:616601bde9fb	342
AdamGreen	0:616601bde9fb	343
AdamGreen	0:616601bde9fb	344	/*
AdamGreen	0:616601bde9fb	345	* ipcp_addci - Add our desired CIs to a packet.
AdamGreen	0:616601bde9fb	346	*/
AdamGreen	0:616601bde9fb	347	static void
AdamGreen	0:616601bde9fb	348	ipcp_addci(fsm f, u_char ucp, int *lenp)
AdamGreen	0:616601bde9fb	349	{
AdamGreen	0:616601bde9fb	350	ipcp_options *go = &ipcp_gotoptions[f->unit];
AdamGreen	0:616601bde9fb	351	int len = *lenp;
AdamGreen	0:616601bde9fb	352
AdamGreen	0:616601bde9fb	353	#define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
AdamGreen	0:616601bde9fb	354	if (neg) { \
AdamGreen	0:616601bde9fb	355	int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
AdamGreen	0:616601bde9fb	356	if (len >= vjlen) { \
AdamGreen	0:616601bde9fb	357	PUTCHAR(opt, ucp); \
AdamGreen	0:616601bde9fb	358	PUTCHAR(vjlen, ucp); \
AdamGreen	0:616601bde9fb	359	PUTSHORT(val, ucp); \
AdamGreen	0:616601bde9fb	360	if (!old) { \
AdamGreen	0:616601bde9fb	361	PUTCHAR(maxslotindex, ucp); \
AdamGreen	0:616601bde9fb	362	PUTCHAR(cflag, ucp); \
AdamGreen	0:616601bde9fb	363	} \
AdamGreen	0:616601bde9fb	364	len -= vjlen; \
AdamGreen	0:616601bde9fb	365	} else { \
AdamGreen	0:616601bde9fb	366	neg = 0; \
AdamGreen	0:616601bde9fb	367	} \
AdamGreen	0:616601bde9fb	368	}
AdamGreen	0:616601bde9fb	369
AdamGreen	0:616601bde9fb	370	#define ADDCIADDR(opt, neg, old, val1, val2) \
AdamGreen	0:616601bde9fb	371	if (neg) { \
AdamGreen	0:616601bde9fb	372	int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
AdamGreen	0:616601bde9fb	373	if (len >= addrlen) { \
AdamGreen	0:616601bde9fb	374	u32_t l; \
AdamGreen	0:616601bde9fb	375	PUTCHAR(opt, ucp); \
AdamGreen	0:616601bde9fb	376	PUTCHAR(addrlen, ucp); \
AdamGreen	0:616601bde9fb	377	l = ntohl(val1); \
AdamGreen	0:616601bde9fb	378	PUTLONG(l, ucp); \
AdamGreen	0:616601bde9fb	379	if (old) { \
AdamGreen	0:616601bde9fb	380	l = ntohl(val2); \
AdamGreen	0:616601bde9fb	381	PUTLONG(l, ucp); \
AdamGreen	0:616601bde9fb	382	} \
AdamGreen	0:616601bde9fb	383	len -= addrlen; \
AdamGreen	0:616601bde9fb	384	} else { \
AdamGreen	0:616601bde9fb	385	neg = 0; \
AdamGreen	0:616601bde9fb	386	} \
AdamGreen	0:616601bde9fb	387	}
AdamGreen	0:616601bde9fb	388
AdamGreen	0:616601bde9fb	389	#define ADDCIDNS(opt, neg, addr) \
AdamGreen	0:616601bde9fb	390	if (neg) { \
AdamGreen	0:616601bde9fb	391	if (len >= CILEN_ADDR) { \
AdamGreen	0:616601bde9fb	392	u32_t l; \
AdamGreen	0:616601bde9fb	393	PUTCHAR(opt, ucp); \
AdamGreen	0:616601bde9fb	394	PUTCHAR(CILEN_ADDR, ucp); \
AdamGreen	0:616601bde9fb	395	l = ntohl(addr); \
AdamGreen	0:616601bde9fb	396	PUTLONG(l, ucp); \
AdamGreen	0:616601bde9fb	397	len -= CILEN_ADDR; \
AdamGreen	0:616601bde9fb	398	} else { \
AdamGreen	0:616601bde9fb	399	neg = 0; \
AdamGreen	0:616601bde9fb	400	} \
AdamGreen	0:616601bde9fb	401	}
AdamGreen	0:616601bde9fb	402
AdamGreen	0:616601bde9fb	403	ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
AdamGreen	0:616601bde9fb	404	go->old_addrs, go->ouraddr, go->hisaddr);
AdamGreen	0:616601bde9fb	405
AdamGreen	0:616601bde9fb	406	ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
AdamGreen	0:616601bde9fb	407	go->maxslotindex, go->cflag);
AdamGreen	0:616601bde9fb	408
AdamGreen	0:616601bde9fb	409	ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
AdamGreen	0:616601bde9fb	410
AdamGreen	0:616601bde9fb	411	ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
AdamGreen	0:616601bde9fb	412
AdamGreen	0:616601bde9fb	413	*lenp -= len;
AdamGreen	0:616601bde9fb	414	}
AdamGreen	0:616601bde9fb	415
AdamGreen	0:616601bde9fb	416
AdamGreen	0:616601bde9fb	417	/*
AdamGreen	0:616601bde9fb	418	* ipcp_ackci - Ack our CIs.
AdamGreen	0:616601bde9fb	419	*
AdamGreen	0:616601bde9fb	420	* Returns:
AdamGreen	0:616601bde9fb	421	* 0 - Ack was bad.
AdamGreen	0:616601bde9fb	422	* 1 - Ack was good.
AdamGreen	0:616601bde9fb	423	*/
AdamGreen	0:616601bde9fb	424	static int
AdamGreen	0:616601bde9fb	425	ipcp_ackci(fsm f, u_char p, int len)
AdamGreen	0:616601bde9fb	426	{
AdamGreen	0:616601bde9fb	427	ipcp_options *go = &ipcp_gotoptions[f->unit];
AdamGreen	0:616601bde9fb	428	u_short cilen, citype, cishort;
AdamGreen	0:616601bde9fb	429	u32_t cilong;
AdamGreen	0:616601bde9fb	430	u_char cimaxslotindex, cicflag;
AdamGreen	0:616601bde9fb	431
AdamGreen	0:616601bde9fb	432	/*
AdamGreen	0:616601bde9fb	433	* CIs must be in exactly the same order that we sent...
AdamGreen	0:616601bde9fb	434	* Check packet length and CI length at each step.
AdamGreen	0:616601bde9fb	435	* If we find any deviations, then this packet is bad.
AdamGreen	0:616601bde9fb	436	*/
AdamGreen	0:616601bde9fb	437
AdamGreen	0:616601bde9fb	438	#define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
AdamGreen	0:616601bde9fb	439	if (neg) { \
AdamGreen	0:616601bde9fb	440	int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
AdamGreen	0:616601bde9fb	441	if ((len -= vjlen) < 0) { \
AdamGreen	0:616601bde9fb	442	goto bad; \
AdamGreen	0:616601bde9fb	443	} \
AdamGreen	0:616601bde9fb	444	GETCHAR(citype, p); \
AdamGreen	0:616601bde9fb	445	GETCHAR(cilen, p); \
AdamGreen	0:616601bde9fb	446	if (cilen != vjlen \|\| \
AdamGreen	0:616601bde9fb	447	citype != opt) { \
AdamGreen	0:616601bde9fb	448	goto bad; \
AdamGreen	0:616601bde9fb	449	} \
AdamGreen	0:616601bde9fb	450	GETSHORT(cishort, p); \
AdamGreen	0:616601bde9fb	451	if (cishort != val) { \
AdamGreen	0:616601bde9fb	452	goto bad; \
AdamGreen	0:616601bde9fb	453	} \
AdamGreen	0:616601bde9fb	454	if (!old) { \
AdamGreen	0:616601bde9fb	455	GETCHAR(cimaxslotindex, p); \
AdamGreen	0:616601bde9fb	456	if (cimaxslotindex != maxslotindex) { \
AdamGreen	0:616601bde9fb	457	goto bad; \
AdamGreen	0:616601bde9fb	458	} \
AdamGreen	0:616601bde9fb	459	GETCHAR(cicflag, p); \
AdamGreen	0:616601bde9fb	460	if (cicflag != cflag) { \
AdamGreen	0:616601bde9fb	461	goto bad; \
AdamGreen	0:616601bde9fb	462	} \
AdamGreen	0:616601bde9fb	463	} \
AdamGreen	0:616601bde9fb	464	}
AdamGreen	0:616601bde9fb	465
AdamGreen	0:616601bde9fb	466	#define ACKCIADDR(opt, neg, old, val1, val2) \
AdamGreen	0:616601bde9fb	467	if (neg) { \
AdamGreen	0:616601bde9fb	468	int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
AdamGreen	0:616601bde9fb	469	u32_t l; \
AdamGreen	0:616601bde9fb	470	if ((len -= addrlen) < 0) { \
AdamGreen	0:616601bde9fb	471	goto bad; \
AdamGreen	0:616601bde9fb	472	} \
AdamGreen	0:616601bde9fb	473	GETCHAR(citype, p); \
AdamGreen	0:616601bde9fb	474	GETCHAR(cilen, p); \
AdamGreen	0:616601bde9fb	475	if (cilen != addrlen \|\| \
AdamGreen	0:616601bde9fb	476	citype != opt) { \
AdamGreen	0:616601bde9fb	477	goto bad; \
AdamGreen	0:616601bde9fb	478	} \
AdamGreen	0:616601bde9fb	479	GETLONG(l, p); \
AdamGreen	0:616601bde9fb	480	cilong = htonl(l); \
AdamGreen	0:616601bde9fb	481	if (val1 != cilong) { \
AdamGreen	0:616601bde9fb	482	goto bad; \
AdamGreen	0:616601bde9fb	483	} \
AdamGreen	0:616601bde9fb	484	if (old) { \
AdamGreen	0:616601bde9fb	485	GETLONG(l, p); \
AdamGreen	0:616601bde9fb	486	cilong = htonl(l); \
AdamGreen	0:616601bde9fb	487	if (val2 != cilong) { \
AdamGreen	0:616601bde9fb	488	goto bad; \
AdamGreen	0:616601bde9fb	489	} \
AdamGreen	0:616601bde9fb	490	} \
AdamGreen	0:616601bde9fb	491	}
AdamGreen	0:616601bde9fb	492
AdamGreen	0:616601bde9fb	493	#define ACKCIDNS(opt, neg, addr) \
AdamGreen	0:616601bde9fb	494	if (neg) { \
AdamGreen	0:616601bde9fb	495	u32_t l; \
AdamGreen	0:616601bde9fb	496	if ((len -= CILEN_ADDR) < 0) { \
AdamGreen	0:616601bde9fb	497	goto bad; \
AdamGreen	0:616601bde9fb	498	} \
AdamGreen	0:616601bde9fb	499	GETCHAR(citype, p); \
AdamGreen	0:616601bde9fb	500	GETCHAR(cilen, p); \
AdamGreen	0:616601bde9fb	501	if (cilen != CILEN_ADDR \|\| \
AdamGreen	0:616601bde9fb	502	citype != opt) { \
AdamGreen	0:616601bde9fb	503	goto bad; \
AdamGreen	0:616601bde9fb	504	} \
AdamGreen	0:616601bde9fb	505	GETLONG(l, p); \
AdamGreen	0:616601bde9fb	506	cilong = htonl(l); \
AdamGreen	0:616601bde9fb	507	if (addr != cilong) { \
AdamGreen	0:616601bde9fb	508	goto bad; \
AdamGreen	0:616601bde9fb	509	} \
AdamGreen	0:616601bde9fb	510	}
AdamGreen	0:616601bde9fb	511
AdamGreen	0:616601bde9fb	512	ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
AdamGreen	0:616601bde9fb	513	go->old_addrs, go->ouraddr, go->hisaddr);
AdamGreen	0:616601bde9fb	514
AdamGreen	0:616601bde9fb	515	ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
AdamGreen	0:616601bde9fb	516	go->maxslotindex, go->cflag);
AdamGreen	0:616601bde9fb	517
AdamGreen	0:616601bde9fb	518	ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
AdamGreen	0:616601bde9fb	519
AdamGreen	0:616601bde9fb	520	ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
AdamGreen	0:616601bde9fb	521
AdamGreen	0:616601bde9fb	522	/*
AdamGreen	0:616601bde9fb	523	* If there are any remaining CIs, then this packet is bad.
AdamGreen	0:616601bde9fb	524	*/
AdamGreen	0:616601bde9fb	525	if (len != 0) {
AdamGreen	0:616601bde9fb	526	goto bad;
AdamGreen	0:616601bde9fb	527	}
AdamGreen	0:616601bde9fb	528	return (1);
AdamGreen	0:616601bde9fb	529
AdamGreen	0:616601bde9fb	530	bad:
AdamGreen	0:616601bde9fb	531	IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
AdamGreen	0:616601bde9fb	532	return (0);
AdamGreen	0:616601bde9fb	533	}
AdamGreen	0:616601bde9fb	534
AdamGreen	0:616601bde9fb	535	/*
AdamGreen	0:616601bde9fb	536	* ipcp_nakci - Peer has sent a NAK for some of our CIs.
AdamGreen	0:616601bde9fb	537	* This should not modify any state if the Nak is bad
AdamGreen	0:616601bde9fb	538	* or if IPCP is in the LS_OPENED state.
AdamGreen	0:616601bde9fb	539	*
AdamGreen	0:616601bde9fb	540	* Returns:
AdamGreen	0:616601bde9fb	541	* 0 - Nak was bad.
AdamGreen	0:616601bde9fb	542	* 1 - Nak was good.
AdamGreen	0:616601bde9fb	543	*/
AdamGreen	0:616601bde9fb	544	static int
AdamGreen	0:616601bde9fb	545	ipcp_nakci(fsm f, u_char p, int len)
AdamGreen	0:616601bde9fb	546	{
AdamGreen	0:616601bde9fb	547	ipcp_options *go = &ipcp_gotoptions[f->unit];
AdamGreen	0:616601bde9fb	548	u_char cimaxslotindex, cicflag;
AdamGreen	0:616601bde9fb	549	u_char citype, cilen, *next;
AdamGreen	0:616601bde9fb	550	u_short cishort;
AdamGreen	0:616601bde9fb	551	u32_t ciaddr1, ciaddr2, l, cidnsaddr;
AdamGreen	0:616601bde9fb	552	ipcp_options no; /* options we've seen Naks for */
AdamGreen	0:616601bde9fb	553	ipcp_options try; /* options to request next time */
AdamGreen	0:616601bde9fb	554
AdamGreen	0:616601bde9fb	555	BZERO(&no, sizeof(no));
AdamGreen	0:616601bde9fb	556	try = *go;
AdamGreen	0:616601bde9fb	557
AdamGreen	0:616601bde9fb	558	/*
AdamGreen	0:616601bde9fb	559	* Any Nak'd CIs must be in exactly the same order that we sent.
AdamGreen	0:616601bde9fb	560	* Check packet length and CI length at each step.
AdamGreen	0:616601bde9fb	561	* If we find any deviations, then this packet is bad.
AdamGreen	0:616601bde9fb	562	*/
AdamGreen	0:616601bde9fb	563	#define NAKCIADDR(opt, neg, old, code) \
AdamGreen	0:616601bde9fb	564	if (go->neg && \
AdamGreen	0:616601bde9fb	565	len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
AdamGreen	0:616601bde9fb	566	p[1] == cilen && \
AdamGreen	0:616601bde9fb	567	p[0] == opt) { \
AdamGreen	0:616601bde9fb	568	len -= cilen; \
AdamGreen	0:616601bde9fb	569	INCPTR(2, p); \
AdamGreen	0:616601bde9fb	570	GETLONG(l, p); \
AdamGreen	0:616601bde9fb	571	ciaddr1 = htonl(l); \
AdamGreen	0:616601bde9fb	572	if (old) { \
AdamGreen	0:616601bde9fb	573	GETLONG(l, p); \
AdamGreen	0:616601bde9fb	574	ciaddr2 = htonl(l); \
AdamGreen	0:616601bde9fb	575	no.old_addrs = 1; \
AdamGreen	0:616601bde9fb	576	} else { \
AdamGreen	0:616601bde9fb	577	ciaddr2 = 0; \
AdamGreen	0:616601bde9fb	578	} \
AdamGreen	0:616601bde9fb	579	no.neg = 1; \
AdamGreen	0:616601bde9fb	580	code \
AdamGreen	0:616601bde9fb	581	}
AdamGreen	0:616601bde9fb	582
AdamGreen	0:616601bde9fb	583	#define NAKCIVJ(opt, neg, code) \
AdamGreen	0:616601bde9fb	584	if (go->neg && \
AdamGreen	0:616601bde9fb	585	((cilen = p[1]) == CILEN_COMPRESS \|\| cilen == CILEN_VJ) && \
AdamGreen	0:616601bde9fb	586	len >= cilen && \
AdamGreen	0:616601bde9fb	587	p[0] == opt) { \
AdamGreen	0:616601bde9fb	588	len -= cilen; \
AdamGreen	0:616601bde9fb	589	INCPTR(2, p); \
AdamGreen	0:616601bde9fb	590	GETSHORT(cishort, p); \
AdamGreen	0:616601bde9fb	591	no.neg = 1; \
AdamGreen	0:616601bde9fb	592	code \
AdamGreen	0:616601bde9fb	593	}
AdamGreen	0:616601bde9fb	594
AdamGreen	0:616601bde9fb	595	#define NAKCIDNS(opt, neg, code) \
AdamGreen	0:616601bde9fb	596	if (go->neg && \
AdamGreen	0:616601bde9fb	597	((cilen = p[1]) == CILEN_ADDR) && \
AdamGreen	0:616601bde9fb	598	len >= cilen && \
AdamGreen	0:616601bde9fb	599	p[0] == opt) { \
AdamGreen	0:616601bde9fb	600	len -= cilen; \
AdamGreen	0:616601bde9fb	601	INCPTR(2, p); \
AdamGreen	0:616601bde9fb	602	GETLONG(l, p); \
AdamGreen	0:616601bde9fb	603	cidnsaddr = htonl(l); \
AdamGreen	0:616601bde9fb	604	no.neg = 1; \
AdamGreen	0:616601bde9fb	605	code \
AdamGreen	0:616601bde9fb	606	}
AdamGreen	0:616601bde9fb	607
AdamGreen	0:616601bde9fb	608	/*
AdamGreen	0:616601bde9fb	609	* Accept the peer's idea of {our,his} address, if different
AdamGreen	0:616601bde9fb	610	* from our idea, only if the accept_{local,remote} flag is set.
AdamGreen	0:616601bde9fb	611	*/
AdamGreen	0:616601bde9fb	612	NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
AdamGreen	0:616601bde9fb	613	if (go->accept_local && ciaddr1) { /* Do we know our address? */
AdamGreen	0:616601bde9fb	614	try.ouraddr = ciaddr1;
AdamGreen	0:616601bde9fb	615	IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
AdamGreen	0:616601bde9fb	616	inet_ntoa(ciaddr1)));
AdamGreen	0:616601bde9fb	617	}
AdamGreen	0:616601bde9fb	618	if (go->accept_remote && ciaddr2) { /* Does he know his? */
AdamGreen	0:616601bde9fb	619	try.hisaddr = ciaddr2;
AdamGreen	0:616601bde9fb	620	IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
AdamGreen	0:616601bde9fb	621	inet_ntoa(ciaddr2)));
AdamGreen	0:616601bde9fb	622	}
AdamGreen	0:616601bde9fb	623	);
AdamGreen	0:616601bde9fb	624
AdamGreen	0:616601bde9fb	625	/*
AdamGreen	0:616601bde9fb	626	* Accept the peer's value of maxslotindex provided that it
AdamGreen	0:616601bde9fb	627	* is less than what we asked for. Turn off slot-ID compression
AdamGreen	0:616601bde9fb	628	* if the peer wants. Send old-style compress-type option if
AdamGreen	0:616601bde9fb	629	* the peer wants.
AdamGreen	0:616601bde9fb	630	*/
AdamGreen	0:616601bde9fb	631	NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
AdamGreen	0:616601bde9fb	632	if (cilen == CILEN_VJ) {
AdamGreen	0:616601bde9fb	633	GETCHAR(cimaxslotindex, p);
AdamGreen	0:616601bde9fb	634	GETCHAR(cicflag, p);
AdamGreen	0:616601bde9fb	635	if (cishort == IPCP_VJ_COMP) {
AdamGreen	0:616601bde9fb	636	try.old_vj = 0;
AdamGreen	0:616601bde9fb	637	if (cimaxslotindex < go->maxslotindex) {
AdamGreen	0:616601bde9fb	638	try.maxslotindex = cimaxslotindex;
AdamGreen	0:616601bde9fb	639	}
AdamGreen	0:616601bde9fb	640	if (!cicflag) {
AdamGreen	0:616601bde9fb	641	try.cflag = 0;
AdamGreen	0:616601bde9fb	642	}
AdamGreen	0:616601bde9fb	643	} else {
AdamGreen	0:616601bde9fb	644	try.neg_vj = 0;
AdamGreen	0:616601bde9fb	645	}
AdamGreen	0:616601bde9fb	646	} else {
AdamGreen	0:616601bde9fb	647	if (cishort == IPCP_VJ_COMP \|\| cishort == IPCP_VJ_COMP_OLD) {
AdamGreen	0:616601bde9fb	648	try.old_vj = 1;
AdamGreen	0:616601bde9fb	649	try.vj_protocol = cishort;
AdamGreen	0:616601bde9fb	650	} else {
AdamGreen	0:616601bde9fb	651	try.neg_vj = 0;
AdamGreen	0:616601bde9fb	652	}
AdamGreen	0:616601bde9fb	653	}
AdamGreen	0:616601bde9fb	654	);
AdamGreen	0:616601bde9fb	655
AdamGreen	0:616601bde9fb	656	NAKCIDNS(CI_MS_DNS1, req_dns1,
AdamGreen	0:616601bde9fb	657	try.dnsaddr[0] = cidnsaddr;
AdamGreen	0:616601bde9fb	658	IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
AdamGreen	0:616601bde9fb	659	);
AdamGreen	0:616601bde9fb	660
AdamGreen	0:616601bde9fb	661	NAKCIDNS(CI_MS_DNS2, req_dns2,
AdamGreen	0:616601bde9fb	662	try.dnsaddr[1] = cidnsaddr;
AdamGreen	0:616601bde9fb	663	IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
AdamGreen	0:616601bde9fb	664	);
AdamGreen	0:616601bde9fb	665
AdamGreen	0:616601bde9fb	666	/*
AdamGreen	0:616601bde9fb	667	* There may be remaining CIs, if the peer is requesting negotiation
AdamGreen	0:616601bde9fb	668	* on an option that we didn't include in our request packet.
AdamGreen	0:616601bde9fb	669	* If they want to negotiate about IP addresses, we comply.
AdamGreen	0:616601bde9fb	670	* If they want us to ask for compression, we refuse.
AdamGreen	0:616601bde9fb	671	*/
AdamGreen	0:616601bde9fb	672	while (len > CILEN_VOID) {
AdamGreen	0:616601bde9fb	673	GETCHAR(citype, p);
AdamGreen	0:616601bde9fb	674	GETCHAR(cilen, p);
AdamGreen	0:616601bde9fb	675	if( (len -= cilen) < 0 ) {
AdamGreen	0:616601bde9fb	676	goto bad;
AdamGreen	0:616601bde9fb	677	}
AdamGreen	0:616601bde9fb	678	next = p + cilen - 2;
AdamGreen	0:616601bde9fb	679
AdamGreen	0:616601bde9fb	680	switch (citype) {
AdamGreen	0:616601bde9fb	681	case CI_COMPRESSTYPE:
AdamGreen	0:616601bde9fb	682	if (go->neg_vj \|\| no.neg_vj \|\|
AdamGreen	0:616601bde9fb	683	(cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
AdamGreen	0:616601bde9fb	684	goto bad;
AdamGreen	0:616601bde9fb	685	}
AdamGreen	0:616601bde9fb	686	no.neg_vj = 1;
AdamGreen	0:616601bde9fb	687	break;
AdamGreen	0:616601bde9fb	688	case CI_ADDRS:
AdamGreen	0:616601bde9fb	689	if ((go->neg_addr && go->old_addrs) \|\| no.old_addrs
AdamGreen	0:616601bde9fb	690	\|\| cilen != CILEN_ADDRS) {
AdamGreen	0:616601bde9fb	691	goto bad;
AdamGreen	0:616601bde9fb	692	}
AdamGreen	0:616601bde9fb	693	try.neg_addr = 1;
AdamGreen	0:616601bde9fb	694	try.old_addrs = 1;
AdamGreen	0:616601bde9fb	695	GETLONG(l, p);
AdamGreen	0:616601bde9fb	696	ciaddr1 = htonl(l);
AdamGreen	0:616601bde9fb	697	if (ciaddr1 && go->accept_local) {
AdamGreen	0:616601bde9fb	698	try.ouraddr = ciaddr1;
AdamGreen	0:616601bde9fb	699	}
AdamGreen	0:616601bde9fb	700	GETLONG(l, p);
AdamGreen	0:616601bde9fb	701	ciaddr2 = htonl(l);
AdamGreen	0:616601bde9fb	702	if (ciaddr2 && go->accept_remote) {
AdamGreen	0:616601bde9fb	703	try.hisaddr = ciaddr2;
AdamGreen	0:616601bde9fb	704	}
AdamGreen	0:616601bde9fb	705	no.old_addrs = 1;
AdamGreen	0:616601bde9fb	706	break;
AdamGreen	0:616601bde9fb	707	case CI_ADDR:
AdamGreen	0:616601bde9fb	708	if (go->neg_addr \|\| no.neg_addr \|\| cilen != CILEN_ADDR) {
AdamGreen	0:616601bde9fb	709	goto bad;
AdamGreen	0:616601bde9fb	710	}
AdamGreen	0:616601bde9fb	711	try.old_addrs = 0;
AdamGreen	0:616601bde9fb	712	GETLONG(l, p);
AdamGreen	0:616601bde9fb	713	ciaddr1 = htonl(l);
AdamGreen	0:616601bde9fb	714	if (ciaddr1 && go->accept_local) {
AdamGreen	0:616601bde9fb	715	try.ouraddr = ciaddr1;
AdamGreen	0:616601bde9fb	716	}
AdamGreen	0:616601bde9fb	717	if (try.ouraddr != 0) {
AdamGreen	0:616601bde9fb	718	try.neg_addr = 1;
AdamGreen	0:616601bde9fb	719	}
AdamGreen	0:616601bde9fb	720	no.neg_addr = 1;
AdamGreen	0:616601bde9fb	721	break;
AdamGreen	0:616601bde9fb	722	}
AdamGreen	0:616601bde9fb	723	p = next;
AdamGreen	0:616601bde9fb	724	}
AdamGreen	0:616601bde9fb	725
AdamGreen	0:616601bde9fb	726	/* If there is still anything left, this packet is bad. */
AdamGreen	0:616601bde9fb	727	if (len != 0) {
AdamGreen	0:616601bde9fb	728	goto bad;
AdamGreen	0:616601bde9fb	729	}
AdamGreen	0:616601bde9fb	730
AdamGreen	0:616601bde9fb	731	/*
AdamGreen	0:616601bde9fb	732	* OK, the Nak is good. Now we can update state.
AdamGreen	0:616601bde9fb	733	*/
AdamGreen	0:616601bde9fb	734	if (f->state != LS_OPENED) {
AdamGreen	0:616601bde9fb	735	*go = try;
AdamGreen	0:616601bde9fb	736	}
AdamGreen	0:616601bde9fb	737
AdamGreen	0:616601bde9fb	738	return 1;
AdamGreen	0:616601bde9fb	739
AdamGreen	0:616601bde9fb	740	bad:
AdamGreen	0:616601bde9fb	741	IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
AdamGreen	0:616601bde9fb	742	return 0;
AdamGreen	0:616601bde9fb	743	}
AdamGreen	0:616601bde9fb	744
AdamGreen	0:616601bde9fb	745
AdamGreen	0:616601bde9fb	746	/*
AdamGreen	0:616601bde9fb	747	* ipcp_rejci - Reject some of our CIs.
AdamGreen	0:616601bde9fb	748	*/
AdamGreen	0:616601bde9fb	749	static int
AdamGreen	0:616601bde9fb	750	ipcp_rejci(fsm f, u_char p, int len)
AdamGreen	0:616601bde9fb	751	{
AdamGreen	0:616601bde9fb	752	ipcp_options *go = &ipcp_gotoptions[f->unit];
AdamGreen	0:616601bde9fb	753	u_char cimaxslotindex, ciflag, cilen;
AdamGreen	0:616601bde9fb	754	u_short cishort;
AdamGreen	0:616601bde9fb	755	u32_t cilong;
AdamGreen	0:616601bde9fb	756	ipcp_options try; /* options to request next time */
AdamGreen	0:616601bde9fb	757
AdamGreen	0:616601bde9fb	758	try = *go;
AdamGreen	0:616601bde9fb	759	/*
AdamGreen	0:616601bde9fb	760	* Any Rejected CIs must be in exactly the same order that we sent.
AdamGreen	0:616601bde9fb	761	* Check packet length and CI length at each step.
AdamGreen	0:616601bde9fb	762	* If we find any deviations, then this packet is bad.
AdamGreen	0:616601bde9fb	763	*/
AdamGreen	0:616601bde9fb	764	#define REJCIADDR(opt, neg, old, val1, val2) \
AdamGreen	0:616601bde9fb	765	if (go->neg && \
AdamGreen	0:616601bde9fb	766	len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
AdamGreen	0:616601bde9fb	767	p[1] == cilen && \
AdamGreen	0:616601bde9fb	768	p[0] == opt) { \
AdamGreen	0:616601bde9fb	769	u32_t l; \
AdamGreen	0:616601bde9fb	770	len -= cilen; \
AdamGreen	0:616601bde9fb	771	INCPTR(2, p); \
AdamGreen	0:616601bde9fb	772	GETLONG(l, p); \
AdamGreen	0:616601bde9fb	773	cilong = htonl(l); \
AdamGreen	0:616601bde9fb	774	/* Check rejected value. */ \
AdamGreen	0:616601bde9fb	775	if (cilong != val1) { \
AdamGreen	0:616601bde9fb	776	goto bad; \
AdamGreen	0:616601bde9fb	777	} \
AdamGreen	0:616601bde9fb	778	if (old) { \
AdamGreen	0:616601bde9fb	779	GETLONG(l, p); \
AdamGreen	0:616601bde9fb	780	cilong = htonl(l); \
AdamGreen	0:616601bde9fb	781	/* Check rejected value. */ \
AdamGreen	0:616601bde9fb	782	if (cilong != val2) { \
AdamGreen	0:616601bde9fb	783	goto bad; \
AdamGreen	0:616601bde9fb	784	} \
AdamGreen	0:616601bde9fb	785	} \
AdamGreen	0:616601bde9fb	786	try.neg = 0; \
AdamGreen	0:616601bde9fb	787	}
AdamGreen	0:616601bde9fb	788
AdamGreen	0:616601bde9fb	789	#define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
AdamGreen	0:616601bde9fb	790	if (go->neg && \
AdamGreen	0:616601bde9fb	791	p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
AdamGreen	0:616601bde9fb	792	len >= p[1] && \
AdamGreen	0:616601bde9fb	793	p[0] == opt) { \
AdamGreen	0:616601bde9fb	794	len -= p[1]; \
AdamGreen	0:616601bde9fb	795	INCPTR(2, p); \
AdamGreen	0:616601bde9fb	796	GETSHORT(cishort, p); \
AdamGreen	0:616601bde9fb	797	/* Check rejected value. */ \
AdamGreen	0:616601bde9fb	798	if (cishort != val) { \
AdamGreen	0:616601bde9fb	799	goto bad; \
AdamGreen	0:616601bde9fb	800	} \
AdamGreen	0:616601bde9fb	801	if (!old) { \
AdamGreen	0:616601bde9fb	802	GETCHAR(cimaxslotindex, p); \
AdamGreen	0:616601bde9fb	803	if (cimaxslotindex != maxslot) { \
AdamGreen	0:616601bde9fb	804	goto bad; \
AdamGreen	0:616601bde9fb	805	} \
AdamGreen	0:616601bde9fb	806	GETCHAR(ciflag, p); \
AdamGreen	0:616601bde9fb	807	if (ciflag != cflag) { \
AdamGreen	0:616601bde9fb	808	goto bad; \
AdamGreen	0:616601bde9fb	809	} \
AdamGreen	0:616601bde9fb	810	} \
AdamGreen	0:616601bde9fb	811	try.neg = 0; \
AdamGreen	0:616601bde9fb	812	}
AdamGreen	0:616601bde9fb	813
AdamGreen	0:616601bde9fb	814	#define REJCIDNS(opt, neg, dnsaddr) \
AdamGreen	0:616601bde9fb	815	if (go->neg && \
AdamGreen	0:616601bde9fb	816	((cilen = p[1]) == CILEN_ADDR) && \
AdamGreen	0:616601bde9fb	817	len >= cilen && \
AdamGreen	0:616601bde9fb	818	p[0] == opt) { \
AdamGreen	0:616601bde9fb	819	u32_t l; \
AdamGreen	0:616601bde9fb	820	len -= cilen; \
AdamGreen	0:616601bde9fb	821	INCPTR(2, p); \
AdamGreen	0:616601bde9fb	822	GETLONG(l, p); \
AdamGreen	0:616601bde9fb	823	cilong = htonl(l); \
AdamGreen	0:616601bde9fb	824	/* Check rejected value. */ \
AdamGreen	0:616601bde9fb	825	if (cilong != dnsaddr) { \
AdamGreen	0:616601bde9fb	826	goto bad; \
AdamGreen	0:616601bde9fb	827	} \
AdamGreen	0:616601bde9fb	828	try.neg = 0; \
AdamGreen	0:616601bde9fb	829	}
AdamGreen	0:616601bde9fb	830
AdamGreen	0:616601bde9fb	831	REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
AdamGreen	0:616601bde9fb	832	go->old_addrs, go->ouraddr, go->hisaddr);
AdamGreen	0:616601bde9fb	833
AdamGreen	0:616601bde9fb	834	REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
AdamGreen	0:616601bde9fb	835	go->maxslotindex, go->cflag);
AdamGreen	0:616601bde9fb	836
AdamGreen	0:616601bde9fb	837	REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
AdamGreen	0:616601bde9fb	838
AdamGreen	0:616601bde9fb	839	REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
AdamGreen	0:616601bde9fb	840
AdamGreen	0:616601bde9fb	841	/*
AdamGreen	0:616601bde9fb	842	* If there are any remaining CIs, then this packet is bad.
AdamGreen	0:616601bde9fb	843	*/
AdamGreen	0:616601bde9fb	844	if (len != 0) {
AdamGreen	0:616601bde9fb	845	goto bad;
AdamGreen	0:616601bde9fb	846	}
AdamGreen	0:616601bde9fb	847	/*
AdamGreen	0:616601bde9fb	848	* Now we can update state.
AdamGreen	0:616601bde9fb	849	*/
AdamGreen	0:616601bde9fb	850	if (f->state != LS_OPENED) {
AdamGreen	0:616601bde9fb	851	*go = try;
AdamGreen	0:616601bde9fb	852	}
AdamGreen	0:616601bde9fb	853	return 1;
AdamGreen	0:616601bde9fb	854
AdamGreen	0:616601bde9fb	855	bad:
AdamGreen	0:616601bde9fb	856	IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
AdamGreen	0:616601bde9fb	857	return 0;
AdamGreen	0:616601bde9fb	858	}
AdamGreen	0:616601bde9fb	859
AdamGreen	0:616601bde9fb	860
AdamGreen	0:616601bde9fb	861	/*
AdamGreen	0:616601bde9fb	862	* ipcp_reqci - Check the peer's requested CIs and send appropriate response.
AdamGreen	0:616601bde9fb	863	*
AdamGreen	0:616601bde9fb	864	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
AdamGreen	0:616601bde9fb	865	* appropriately. If reject_if_disagree is non-zero, doesn't return
AdamGreen	0:616601bde9fb	866	* CONFNAK; returns CONFREJ if it can't return CONFACK.
AdamGreen	0:616601bde9fb	867	*/
AdamGreen	0:616601bde9fb	868	static int
AdamGreen	0:616601bde9fb	869	ipcp_reqci(fsm f, u_char inp/* Requested CIs /,int len/* Length of requested CIs */,int reject_if_disagree)
AdamGreen	0:616601bde9fb	870	{
AdamGreen	0:616601bde9fb	871	ipcp_options *wo = &ipcp_wantoptions[f->unit];
AdamGreen	0:616601bde9fb	872	ipcp_options *ho = &ipcp_hisoptions[f->unit];
AdamGreen	0:616601bde9fb	873	ipcp_options *ao = &ipcp_allowoptions[f->unit];
AdamGreen	0:616601bde9fb	874	#ifdef OLD_CI_ADDRS
AdamGreen	0:616601bde9fb	875	ipcp_options *go = &ipcp_gotoptions[f->unit];
AdamGreen	0:616601bde9fb	876	#endif
AdamGreen	0:616601bde9fb	877	u_char cip, next; /* Pointer to current and next CIs */
AdamGreen	0:616601bde9fb	878	u_short cilen, citype; /* Parsed len, type */
AdamGreen	0:616601bde9fb	879	u_short cishort; /* Parsed short value */
AdamGreen	0:616601bde9fb	880	u32_t tl, ciaddr1; /* Parsed address values */
AdamGreen	0:616601bde9fb	881	#ifdef OLD_CI_ADDRS
AdamGreen	0:616601bde9fb	882	u32_t ciaddr2; /* Parsed address values */
AdamGreen	0:616601bde9fb	883	#endif
AdamGreen	0:616601bde9fb	884	int rc = CONFACK; /* Final packet return code */
AdamGreen	0:616601bde9fb	885	int orc; /* Individual option return code */
AdamGreen	0:616601bde9fb	886	u_char p; / Pointer to next char to parse */
AdamGreen	0:616601bde9fb	887	u_char ucp = inp; / Pointer to current output char */
AdamGreen	0:616601bde9fb	888	int l = len; / Length left */
AdamGreen	0:616601bde9fb	889	u_char maxslotindex, cflag;
AdamGreen	0:616601bde9fb	890	int d;
AdamGreen	0:616601bde9fb	891
AdamGreen	0:616601bde9fb	892	cis_received[f->unit] = 1;
AdamGreen	0:616601bde9fb	893
AdamGreen	0:616601bde9fb	894	/*
AdamGreen	0:616601bde9fb	895	* Reset all his options.
AdamGreen	0:616601bde9fb	896	*/
AdamGreen	0:616601bde9fb	897	BZERO(ho, sizeof(*ho));
AdamGreen	0:616601bde9fb	898
AdamGreen	0:616601bde9fb	899	/*
AdamGreen	0:616601bde9fb	900	* Process all his options.
AdamGreen	0:616601bde9fb	901	*/
AdamGreen	0:616601bde9fb	902	next = inp;
AdamGreen	0:616601bde9fb	903	while (l) {
AdamGreen	0:616601bde9fb	904	orc = CONFACK; /* Assume success */
AdamGreen	0:616601bde9fb	905	cip = p = next; /* Remember begining of CI */
AdamGreen	0:616601bde9fb	906	if (l < 2 \|\| /* Not enough data for CI header or */
AdamGreen	0:616601bde9fb	907	p[1] < 2 \|\| /* CI length too small or */
AdamGreen	0:616601bde9fb	908	p[1] > l) { /* CI length too big? */
AdamGreen	0:616601bde9fb	909	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
AdamGreen	0:616601bde9fb	910	orc = CONFREJ; /* Reject bad CI */
AdamGreen	0:616601bde9fb	911	cilen = (u_short)l;/* Reject till end of packet */
AdamGreen	0:616601bde9fb	912	l = 0; /* Don't loop again */
AdamGreen	0:616601bde9fb	913	goto endswitch;
AdamGreen	0:616601bde9fb	914	}
AdamGreen	0:616601bde9fb	915	GETCHAR(citype, p); /* Parse CI type */
AdamGreen	0:616601bde9fb	916	GETCHAR(cilen, p); /* Parse CI length */
AdamGreen	0:616601bde9fb	917	l -= cilen; /* Adjust remaining length */
AdamGreen	0:616601bde9fb	918	next += cilen; /* Step to next CI */
AdamGreen	0:616601bde9fb	919
AdamGreen	0:616601bde9fb	920	switch (citype) { /* Check CI type */
AdamGreen	0:616601bde9fb	921	#ifdef OLD_CI_ADDRS /* Need to save space... */
AdamGreen	0:616601bde9fb	922	case CI_ADDRS:
AdamGreen	0:616601bde9fb	923	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
AdamGreen	0:616601bde9fb	924	if (!ao->neg_addr \|\|
AdamGreen	0:616601bde9fb	925	cilen != CILEN_ADDRS) { /* Check CI length */
AdamGreen	0:616601bde9fb	926	orc = CONFREJ; /* Reject CI */
AdamGreen	0:616601bde9fb	927	break;
AdamGreen	0:616601bde9fb	928	}
AdamGreen	0:616601bde9fb	929
AdamGreen	0:616601bde9fb	930	/*
AdamGreen	0:616601bde9fb	931	* If he has no address, or if we both have his address but
AdamGreen	0:616601bde9fb	932	* disagree about it, then NAK it with our idea.
AdamGreen	0:616601bde9fb	933	* In particular, if we don't know his address, but he does,
AdamGreen	0:616601bde9fb	934	* then accept it.
AdamGreen	0:616601bde9fb	935	*/
AdamGreen	0:616601bde9fb	936	GETLONG(tl, p); /* Parse source address (his) */
AdamGreen	0:616601bde9fb	937	ciaddr1 = htonl(tl);
AdamGreen	0:616601bde9fb	938	IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
AdamGreen	0:616601bde9fb	939	if (ciaddr1 != wo->hisaddr
AdamGreen	0:616601bde9fb	940	&& (ciaddr1 == 0 \|\| !wo->accept_remote)) {
AdamGreen	0:616601bde9fb	941	orc = CONFNAK;
AdamGreen	0:616601bde9fb	942	if (!reject_if_disagree) {
AdamGreen	0:616601bde9fb	943	DECPTR(sizeof(u32_t), p);
AdamGreen	0:616601bde9fb	944	tl = ntohl(wo->hisaddr);
AdamGreen	0:616601bde9fb	945	PUTLONG(tl, p);
AdamGreen	0:616601bde9fb	946	}
AdamGreen	0:616601bde9fb	947	} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
AdamGreen	0:616601bde9fb	948	/*
AdamGreen	0:616601bde9fb	949	* If neither we nor he knows his address, reject the option.
AdamGreen	0:616601bde9fb	950	*/
AdamGreen	0:616601bde9fb	951	orc = CONFREJ;
AdamGreen	0:616601bde9fb	952	wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
AdamGreen	0:616601bde9fb	953	break;
AdamGreen	0:616601bde9fb	954	}
AdamGreen	0:616601bde9fb	955
AdamGreen	0:616601bde9fb	956	/*
AdamGreen	0:616601bde9fb	957	* If he doesn't know our address, or if we both have our address
AdamGreen	0:616601bde9fb	958	* but disagree about it, then NAK it with our idea.
AdamGreen	0:616601bde9fb	959	*/
AdamGreen	0:616601bde9fb	960	GETLONG(tl, p); /* Parse desination address (ours) */
AdamGreen	0:616601bde9fb	961	ciaddr2 = htonl(tl);
AdamGreen	0:616601bde9fb	962	IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
AdamGreen	0:616601bde9fb	963	if (ciaddr2 != wo->ouraddr) {
AdamGreen	0:616601bde9fb	964	if (ciaddr2 == 0 \|\| !wo->accept_local) {
AdamGreen	0:616601bde9fb	965	orc = CONFNAK;
AdamGreen	0:616601bde9fb	966	if (!reject_if_disagree) {
AdamGreen	0:616601bde9fb	967	DECPTR(sizeof(u32_t), p);
AdamGreen	0:616601bde9fb	968	tl = ntohl(wo->ouraddr);
AdamGreen	0:616601bde9fb	969	PUTLONG(tl, p);
AdamGreen	0:616601bde9fb	970	}
AdamGreen	0:616601bde9fb	971	} else {
AdamGreen	0:616601bde9fb	972	go->ouraddr = ciaddr2; /* accept peer's idea */
AdamGreen	0:616601bde9fb	973	}
AdamGreen	0:616601bde9fb	974	}
AdamGreen	0:616601bde9fb	975
AdamGreen	0:616601bde9fb	976	ho->neg_addr = 1;
AdamGreen	0:616601bde9fb	977	ho->old_addrs = 1;
AdamGreen	0:616601bde9fb	978	ho->hisaddr = ciaddr1;
AdamGreen	0:616601bde9fb	979	ho->ouraddr = ciaddr2;
AdamGreen	0:616601bde9fb	980	break;
AdamGreen	0:616601bde9fb	981	#endif
AdamGreen	0:616601bde9fb	982
AdamGreen	0:616601bde9fb	983	case CI_ADDR:
AdamGreen	0:616601bde9fb	984	if (!ao->neg_addr) {
AdamGreen	0:616601bde9fb	985	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
AdamGreen	0:616601bde9fb	986	orc = CONFREJ; /* Reject CI */
AdamGreen	0:616601bde9fb	987	break;
AdamGreen	0:616601bde9fb	988	} else if (cilen != CILEN_ADDR) { /* Check CI length */
AdamGreen	0:616601bde9fb	989	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
AdamGreen	0:616601bde9fb	990	orc = CONFREJ; /* Reject CI */
AdamGreen	0:616601bde9fb	991	break;
AdamGreen	0:616601bde9fb	992	}
AdamGreen	0:616601bde9fb	993
AdamGreen	0:616601bde9fb	994	/*
AdamGreen	0:616601bde9fb	995	* If he has no address, or if we both have his address but
AdamGreen	0:616601bde9fb	996	* disagree about it, then NAK it with our idea.
AdamGreen	0:616601bde9fb	997	* In particular, if we don't know his address, but he does,
AdamGreen	0:616601bde9fb	998	* then accept it.
AdamGreen	0:616601bde9fb	999	*/
AdamGreen	0:616601bde9fb	1000	GETLONG(tl, p); /* Parse source address (his) */
AdamGreen	0:616601bde9fb	1001	ciaddr1 = htonl(tl);
AdamGreen	0:616601bde9fb	1002	if (ciaddr1 != wo->hisaddr
AdamGreen	0:616601bde9fb	1003	&& (ciaddr1 == 0 \|\| !wo->accept_remote)) {
AdamGreen	0:616601bde9fb	1004	orc = CONFNAK;
AdamGreen	0:616601bde9fb	1005	if (!reject_if_disagree) {
AdamGreen	0:616601bde9fb	1006	DECPTR(sizeof(u32_t), p);
AdamGreen	0:616601bde9fb	1007	tl = ntohl(wo->hisaddr);
AdamGreen	0:616601bde9fb	1008	PUTLONG(tl, p);
AdamGreen	0:616601bde9fb	1009	}
AdamGreen	0:616601bde9fb	1010	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
AdamGreen	0:616601bde9fb	1011	} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
AdamGreen	0:616601bde9fb	1012	/*
AdamGreen	0:616601bde9fb	1013	* Don't ACK an address of 0.0.0.0 - reject it instead.
AdamGreen	0:616601bde9fb	1014	*/
AdamGreen	0:616601bde9fb	1015	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
AdamGreen	0:616601bde9fb	1016	orc = CONFREJ;
AdamGreen	0:616601bde9fb	1017	wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
AdamGreen	0:616601bde9fb	1018	break;
AdamGreen	0:616601bde9fb	1019	}
AdamGreen	0:616601bde9fb	1020
AdamGreen	0:616601bde9fb	1021	ho->neg_addr = 1;
AdamGreen	0:616601bde9fb	1022	ho->hisaddr = ciaddr1;
AdamGreen	0:616601bde9fb	1023	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
AdamGreen	0:616601bde9fb	1024	break;
AdamGreen	0:616601bde9fb	1025
AdamGreen	0:616601bde9fb	1026	case CI_MS_DNS1:
AdamGreen	0:616601bde9fb	1027	case CI_MS_DNS2:
AdamGreen	0:616601bde9fb	1028	/* Microsoft primary or secondary DNS request */
AdamGreen	0:616601bde9fb	1029	d = citype == CI_MS_DNS2;
AdamGreen	0:616601bde9fb	1030
AdamGreen	0:616601bde9fb	1031	/* If we do not have a DNS address then we cannot send it */
AdamGreen	0:616601bde9fb	1032	if (ao->dnsaddr[d] == 0 \|\|
AdamGreen	0:616601bde9fb	1033	cilen != CILEN_ADDR) { /* Check CI length */
AdamGreen	0:616601bde9fb	1034	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
AdamGreen	0:616601bde9fb	1035	orc = CONFREJ; /* Reject CI */
AdamGreen	0:616601bde9fb	1036	break;
AdamGreen	0:616601bde9fb	1037	}
AdamGreen	0:616601bde9fb	1038	GETLONG(tl, p);
AdamGreen	0:616601bde9fb	1039	if (htonl(tl) != ao->dnsaddr[d]) {
AdamGreen	0:616601bde9fb	1040	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
AdamGreen	0:616601bde9fb	1041	d+1, inet_ntoa(tl)));
AdamGreen	0:616601bde9fb	1042	DECPTR(sizeof(u32_t), p);
AdamGreen	0:616601bde9fb	1043	tl = ntohl(ao->dnsaddr[d]);
AdamGreen	0:616601bde9fb	1044	PUTLONG(tl, p);
AdamGreen	0:616601bde9fb	1045	orc = CONFNAK;
AdamGreen	0:616601bde9fb	1046	}
AdamGreen	0:616601bde9fb	1047	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
AdamGreen	0:616601bde9fb	1048	break;
AdamGreen	0:616601bde9fb	1049
AdamGreen	0:616601bde9fb	1050	case CI_MS_WINS1:
AdamGreen	0:616601bde9fb	1051	case CI_MS_WINS2:
AdamGreen	0:616601bde9fb	1052	/* Microsoft primary or secondary WINS request */
AdamGreen	0:616601bde9fb	1053	d = citype == CI_MS_WINS2;
AdamGreen	0:616601bde9fb	1054	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
AdamGreen	0:616601bde9fb	1055
AdamGreen	0:616601bde9fb	1056	/* If we do not have a DNS address then we cannot send it */
AdamGreen	0:616601bde9fb	1057	if (ao->winsaddr[d] == 0 \|\|
AdamGreen	0:616601bde9fb	1058	cilen != CILEN_ADDR) { /* Check CI length */
AdamGreen	0:616601bde9fb	1059	orc = CONFREJ; /* Reject CI */
AdamGreen	0:616601bde9fb	1060	break;
AdamGreen	0:616601bde9fb	1061	}
AdamGreen	0:616601bde9fb	1062	GETLONG(tl, p);
AdamGreen	0:616601bde9fb	1063	if (htonl(tl) != ao->winsaddr[d]) {
AdamGreen	0:616601bde9fb	1064	DECPTR(sizeof(u32_t), p);
AdamGreen	0:616601bde9fb	1065	tl = ntohl(ao->winsaddr[d]);
AdamGreen	0:616601bde9fb	1066	PUTLONG(tl, p);
AdamGreen	0:616601bde9fb	1067	orc = CONFNAK;
AdamGreen	0:616601bde9fb	1068	}
AdamGreen	0:616601bde9fb	1069	break;
AdamGreen	0:616601bde9fb	1070
AdamGreen	0:616601bde9fb	1071	case CI_COMPRESSTYPE:
AdamGreen	0:616601bde9fb	1072	if (!ao->neg_vj) {
AdamGreen	0:616601bde9fb	1073	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
AdamGreen	0:616601bde9fb	1074	orc = CONFREJ;
AdamGreen	0:616601bde9fb	1075	break;
AdamGreen	0:616601bde9fb	1076	} else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
AdamGreen	0:616601bde9fb	1077	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
AdamGreen	0:616601bde9fb	1078	orc = CONFREJ;
AdamGreen	0:616601bde9fb	1079	break;
AdamGreen	0:616601bde9fb	1080	}
AdamGreen	0:616601bde9fb	1081	GETSHORT(cishort, p);
AdamGreen	0:616601bde9fb	1082
AdamGreen	0:616601bde9fb	1083	if (!(cishort == IPCP_VJ_COMP \|\|
AdamGreen	0:616601bde9fb	1084	(cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
AdamGreen	0:616601bde9fb	1085	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
AdamGreen	0:616601bde9fb	1086	orc = CONFREJ;
AdamGreen	0:616601bde9fb	1087	break;
AdamGreen	0:616601bde9fb	1088	}
AdamGreen	0:616601bde9fb	1089
AdamGreen	0:616601bde9fb	1090	ho->neg_vj = 1;
AdamGreen	0:616601bde9fb	1091	ho->vj_protocol = cishort;
AdamGreen	0:616601bde9fb	1092	if (cilen == CILEN_VJ) {
AdamGreen	0:616601bde9fb	1093	GETCHAR(maxslotindex, p);
AdamGreen	0:616601bde9fb	1094	if (maxslotindex > ao->maxslotindex) {
AdamGreen	0:616601bde9fb	1095	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
AdamGreen	0:616601bde9fb	1096	orc = CONFNAK;
AdamGreen	0:616601bde9fb	1097	if (!reject_if_disagree) {
AdamGreen	0:616601bde9fb	1098	DECPTR(1, p);
AdamGreen	0:616601bde9fb	1099	PUTCHAR(ao->maxslotindex, p);
AdamGreen	0:616601bde9fb	1100	}
AdamGreen	0:616601bde9fb	1101	}
AdamGreen	0:616601bde9fb	1102	GETCHAR(cflag, p);
AdamGreen	0:616601bde9fb	1103	if (cflag && !ao->cflag) {
AdamGreen	0:616601bde9fb	1104	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
AdamGreen	0:616601bde9fb	1105	orc = CONFNAK;
AdamGreen	0:616601bde9fb	1106	if (!reject_if_disagree) {
AdamGreen	0:616601bde9fb	1107	DECPTR(1, p);
AdamGreen	0:616601bde9fb	1108	PUTCHAR(wo->cflag, p);
AdamGreen	0:616601bde9fb	1109	}
AdamGreen	0:616601bde9fb	1110	}
AdamGreen	0:616601bde9fb	1111	ho->maxslotindex = maxslotindex;
AdamGreen	0:616601bde9fb	1112	ho->cflag = cflag;
AdamGreen	0:616601bde9fb	1113	} else {
AdamGreen	0:616601bde9fb	1114	ho->old_vj = 1;
AdamGreen	0:616601bde9fb	1115	ho->maxslotindex = MAX_SLOTS - 1;
AdamGreen	0:616601bde9fb	1116	ho->cflag = 1;
AdamGreen	0:616601bde9fb	1117	}
AdamGreen	0:616601bde9fb	1118	IPCPDEBUG(LOG_INFO, (
AdamGreen	0:616601bde9fb	1119	"ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
AdamGreen	0:616601bde9fb	1120	ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
AdamGreen	0:616601bde9fb	1121	break;
AdamGreen	0:616601bde9fb	1122
AdamGreen	0:616601bde9fb	1123	default:
AdamGreen	0:616601bde9fb	1124	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
AdamGreen	0:616601bde9fb	1125	orc = CONFREJ;
AdamGreen	0:616601bde9fb	1126	break;
AdamGreen	0:616601bde9fb	1127	}
AdamGreen	0:616601bde9fb	1128
AdamGreen	0:616601bde9fb	1129	endswitch:
AdamGreen	0:616601bde9fb	1130	if (orc == CONFACK && /* Good CI */
AdamGreen	0:616601bde9fb	1131	rc != CONFACK) { /* but prior CI wasnt? */
AdamGreen	0:616601bde9fb	1132	continue; /* Don't send this one */
AdamGreen	0:616601bde9fb	1133	}
AdamGreen	0:616601bde9fb	1134
AdamGreen	0:616601bde9fb	1135	if (orc == CONFNAK) { /* Nak this CI? */
AdamGreen	0:616601bde9fb	1136	if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
AdamGreen	0:616601bde9fb	1137	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
AdamGreen	0:616601bde9fb	1138	orc = CONFREJ; /* Get tough if so */
AdamGreen	0:616601bde9fb	1139	} else {
AdamGreen	0:616601bde9fb	1140	if (rc == CONFREJ) { /* Rejecting prior CI? */
AdamGreen	0:616601bde9fb	1141	continue; /* Don't send this one */
AdamGreen	0:616601bde9fb	1142	}
AdamGreen	0:616601bde9fb	1143	if (rc == CONFACK) { /* Ack'd all prior CIs? */
AdamGreen	0:616601bde9fb	1144	rc = CONFNAK; /* Not anymore... */
AdamGreen	0:616601bde9fb	1145	ucp = inp; /* Backup */
AdamGreen	0:616601bde9fb	1146	}
AdamGreen	0:616601bde9fb	1147	}
AdamGreen	0:616601bde9fb	1148	}
AdamGreen	0:616601bde9fb	1149
AdamGreen	0:616601bde9fb	1150	if (orc == CONFREJ && /* Reject this CI */
AdamGreen	0:616601bde9fb	1151	rc != CONFREJ) { /* but no prior ones? */
AdamGreen	0:616601bde9fb	1152	rc = CONFREJ;
AdamGreen	0:616601bde9fb	1153	ucp = inp; /* Backup */
AdamGreen	0:616601bde9fb	1154	}
AdamGreen	0:616601bde9fb	1155
AdamGreen	0:616601bde9fb	1156	/* Need to move CI? */
AdamGreen	0:616601bde9fb	1157	if (ucp != cip) {
AdamGreen	0:616601bde9fb	1158	BCOPY(cip, ucp, cilen); /* Move it */
AdamGreen	0:616601bde9fb	1159	}
AdamGreen	0:616601bde9fb	1160
AdamGreen	0:616601bde9fb	1161	/* Update output pointer */
AdamGreen	0:616601bde9fb	1162	INCPTR(cilen, ucp);
AdamGreen	0:616601bde9fb	1163	}
AdamGreen	0:616601bde9fb	1164
AdamGreen	0:616601bde9fb	1165	/*
AdamGreen	0:616601bde9fb	1166	* If we aren't rejecting this packet, and we want to negotiate
AdamGreen	0:616601bde9fb	1167	* their address, and they didn't send their address, then we
AdamGreen	0:616601bde9fb	1168	* send a NAK with a CI_ADDR option appended. We assume the
AdamGreen	0:616601bde9fb	1169	* input buffer is long enough that we can append the extra
AdamGreen	0:616601bde9fb	1170	* option safely.
AdamGreen	0:616601bde9fb	1171	*/
AdamGreen	0:616601bde9fb	1172	if (rc != CONFREJ && !ho->neg_addr &&
AdamGreen	0:616601bde9fb	1173	wo->req_addr && !reject_if_disagree) {
AdamGreen	0:616601bde9fb	1174	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
AdamGreen	0:616601bde9fb	1175	if (rc == CONFACK) {
AdamGreen	0:616601bde9fb	1176	rc = CONFNAK;
AdamGreen	0:616601bde9fb	1177	ucp = inp; /* reset pointer */
AdamGreen	0:616601bde9fb	1178	wo->req_addr = 0; /* don't ask again */
AdamGreen	0:616601bde9fb	1179	}
AdamGreen	0:616601bde9fb	1180	PUTCHAR(CI_ADDR, ucp);
AdamGreen	0:616601bde9fb	1181	PUTCHAR(CILEN_ADDR, ucp);
AdamGreen	0:616601bde9fb	1182	tl = ntohl(wo->hisaddr);
AdamGreen	0:616601bde9fb	1183	PUTLONG(tl, ucp);
AdamGreen	0:616601bde9fb	1184	}
AdamGreen	0:616601bde9fb	1185
AdamGreen	0:616601bde9fb	1186	len = (int)(ucp - inp); / Compute output length */
AdamGreen	0:616601bde9fb	1187	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
AdamGreen	0:616601bde9fb	1188	return (rc); /* Return final code */
AdamGreen	0:616601bde9fb	1189	}
AdamGreen	0:616601bde9fb	1190
AdamGreen	0:616601bde9fb	1191
AdamGreen	0:616601bde9fb	1192	#if 0
AdamGreen	0:616601bde9fb	1193	/*
AdamGreen	0:616601bde9fb	1194	* ip_check_options - check that any IP-related options are OK,
AdamGreen	0:616601bde9fb	1195	* and assign appropriate defaults.
AdamGreen	0:616601bde9fb	1196	*/
AdamGreen	0:616601bde9fb	1197	static void
AdamGreen	0:616601bde9fb	1198	ip_check_options(u_long localAddr)
AdamGreen	0:616601bde9fb	1199	{
AdamGreen	0:616601bde9fb	1200	ipcp_options *wo = &ipcp_wantoptions[0];
AdamGreen	0:616601bde9fb	1201
AdamGreen	0:616601bde9fb	1202	/*
AdamGreen	0:616601bde9fb	1203	* Load our default IP address but allow the remote host to give us
AdamGreen	0:616601bde9fb	1204	* a new address.
AdamGreen	0:616601bde9fb	1205	*/
AdamGreen	0:616601bde9fb	1206	if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
AdamGreen	0:616601bde9fb	1207	wo->accept_local = 1; /* don't insist on this default value */
AdamGreen	0:616601bde9fb	1208	wo->ouraddr = htonl(localAddr);
AdamGreen	0:616601bde9fb	1209	}
AdamGreen	0:616601bde9fb	1210	}
AdamGreen	0:616601bde9fb	1211	#endif
AdamGreen	0:616601bde9fb	1212
AdamGreen	0:616601bde9fb	1213
AdamGreen	0:616601bde9fb	1214	/*
AdamGreen	0:616601bde9fb	1215	* ipcp_up - IPCP has come UP.
AdamGreen	0:616601bde9fb	1216	*
AdamGreen	0:616601bde9fb	1217	* Configure the IP network interface appropriately and bring it up.
AdamGreen	0:616601bde9fb	1218	*/
AdamGreen	0:616601bde9fb	1219	static void
AdamGreen	0:616601bde9fb	1220	ipcp_up(fsm *f)
AdamGreen	0:616601bde9fb	1221	{
AdamGreen	0:616601bde9fb	1222	u32_t mask;
AdamGreen	0:616601bde9fb	1223	ipcp_options *ho = &ipcp_hisoptions[f->unit];
AdamGreen	0:616601bde9fb	1224	ipcp_options *go = &ipcp_gotoptions[f->unit];
AdamGreen	0:616601bde9fb	1225	ipcp_options *wo = &ipcp_wantoptions[f->unit];
AdamGreen	0:616601bde9fb	1226
AdamGreen	0:616601bde9fb	1227	np_up(f->unit, PPP_IP);
AdamGreen	0:616601bde9fb	1228	IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
AdamGreen	0:616601bde9fb	1229
AdamGreen	0:616601bde9fb	1230	/*
AdamGreen	0:616601bde9fb	1231	* We must have a non-zero IP address for both ends of the link.
AdamGreen	0:616601bde9fb	1232	*/
AdamGreen	0:616601bde9fb	1233	if (!ho->neg_addr) {
AdamGreen	0:616601bde9fb	1234	ho->hisaddr = wo->hisaddr;
AdamGreen	0:616601bde9fb	1235	}
AdamGreen	0:616601bde9fb	1236	#ifdef __PPP_STRICT_IMPL__ //DG : Kludge for bad 3g providers PPP impl
AdamGreen	0:616601bde9fb	1237	if (ho->hisaddr == 0) {
AdamGreen	0:616601bde9fb	1238	IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
AdamGreen	0:616601bde9fb	1239	ipcp_close(f->unit, "Could not determine remote IP address");
AdamGreen	0:616601bde9fb	1240	return;
AdamGreen	0:616601bde9fb	1241	}
AdamGreen	0:616601bde9fb	1242	#endif
AdamGreen	0:616601bde9fb	1243	if (go->ouraddr == 0) {
AdamGreen	0:616601bde9fb	1244	IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
AdamGreen	0:616601bde9fb	1245	ipcp_close(f->unit, "Could not determine local IP address");
AdamGreen	0:616601bde9fb	1246	return;
AdamGreen	0:616601bde9fb	1247	}
AdamGreen	0:616601bde9fb	1248
AdamGreen	0:616601bde9fb	1249	if (ppp_settings.usepeerdns && (go->dnsaddr[0] \|\| go->dnsaddr[1])) {
AdamGreen	0:616601bde9fb	1250	/pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);/
AdamGreen	0:616601bde9fb	1251	}
AdamGreen	0:616601bde9fb	1252
AdamGreen	0:616601bde9fb	1253	/*
AdamGreen	0:616601bde9fb	1254	* Check that the peer is allowed to use the IP address it wants.
AdamGreen	0:616601bde9fb	1255	*/
AdamGreen	0:616601bde9fb	1256	if (!auth_ip_addr(f->unit, ho->hisaddr)) {
AdamGreen	0:616601bde9fb	1257	IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
AdamGreen	0:616601bde9fb	1258	inet_ntoa(ho->hisaddr)));
AdamGreen	0:616601bde9fb	1259	ipcp_close(f->unit, "Unauthorized remote IP address");
AdamGreen	0:616601bde9fb	1260	return;
AdamGreen	0:616601bde9fb	1261	}
AdamGreen	0:616601bde9fb	1262
AdamGreen	0:616601bde9fb	1263	/* set tcp compression */
AdamGreen	0:616601bde9fb	1264	sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
AdamGreen	0:616601bde9fb	1265
AdamGreen	0:616601bde9fb	1266	/*
AdamGreen	0:616601bde9fb	1267	* Set IP addresses and (if specified) netmask.
AdamGreen	0:616601bde9fb	1268	*/
AdamGreen	0:616601bde9fb	1269	mask = GetMask(go->ouraddr);
AdamGreen	0:616601bde9fb	1270
AdamGreen	0:616601bde9fb	1271	if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
AdamGreen	0:616601bde9fb	1272	IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
AdamGreen	0:616601bde9fb	1273	ipcp_close(f->unit, "Interface configuration failed");
AdamGreen	0:616601bde9fb	1274	return;
AdamGreen	0:616601bde9fb	1275	}
AdamGreen	0:616601bde9fb	1276
AdamGreen	0:616601bde9fb	1277	/* bring the interface up for IP */
AdamGreen	0:616601bde9fb	1278	if (!sifup(f->unit)) {
AdamGreen	0:616601bde9fb	1279	IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
AdamGreen	0:616601bde9fb	1280	ipcp_close(f->unit, "Interface configuration failed");
AdamGreen	0:616601bde9fb	1281	return;
AdamGreen	0:616601bde9fb	1282	}
AdamGreen	0:616601bde9fb	1283
AdamGreen	0:616601bde9fb	1284	sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
AdamGreen	0:616601bde9fb	1285
AdamGreen	0:616601bde9fb	1286	/* assign a default route through the interface if required */
AdamGreen	0:616601bde9fb	1287	if (ipcp_wantoptions[f->unit].default_route) {
AdamGreen	0:616601bde9fb	1288	if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
AdamGreen	0:616601bde9fb	1289	default_route_set[f->unit] = 1;
AdamGreen	0:616601bde9fb	1290	}
AdamGreen	0:616601bde9fb	1291	}
AdamGreen	0:616601bde9fb	1292
AdamGreen	0:616601bde9fb	1293	IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
AdamGreen	0:616601bde9fb	1294	IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
AdamGreen	0:616601bde9fb	1295	if (go->dnsaddr[0]) {
AdamGreen	0:616601bde9fb	1296	IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
AdamGreen	0:616601bde9fb	1297	}
AdamGreen	0:616601bde9fb	1298	if (go->dnsaddr[1]) {
AdamGreen	0:616601bde9fb	1299	IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
AdamGreen	0:616601bde9fb	1300	}
AdamGreen	0:616601bde9fb	1301	}
AdamGreen	0:616601bde9fb	1302
AdamGreen	0:616601bde9fb	1303
AdamGreen	0:616601bde9fb	1304	/*
AdamGreen	0:616601bde9fb	1305	* ipcp_down - IPCP has gone DOWN.
AdamGreen	0:616601bde9fb	1306	*
AdamGreen	0:616601bde9fb	1307	* Take the IP network interface down, clear its addresses
AdamGreen	0:616601bde9fb	1308	* and delete routes through it.
AdamGreen	0:616601bde9fb	1309	*/
AdamGreen	0:616601bde9fb	1310	static void
AdamGreen	0:616601bde9fb	1311	ipcp_down(fsm *f)
AdamGreen	0:616601bde9fb	1312	{
AdamGreen	0:616601bde9fb	1313	IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
AdamGreen	0:616601bde9fb	1314	np_down(f->unit, PPP_IP);
AdamGreen	0:616601bde9fb	1315	sifvjcomp(f->unit, 0, 0, 0);
AdamGreen	0:616601bde9fb	1316
AdamGreen	0:616601bde9fb	1317	sifdown(f->unit);
AdamGreen	0:616601bde9fb	1318	ipcp_clear_addrs(f->unit);
AdamGreen	0:616601bde9fb	1319	}
AdamGreen	0:616601bde9fb	1320
AdamGreen	0:616601bde9fb	1321
AdamGreen	0:616601bde9fb	1322	/*
AdamGreen	0:616601bde9fb	1323	* ipcp_clear_addrs() - clear the interface addresses, routes, etc.
AdamGreen	0:616601bde9fb	1324	*/
AdamGreen	0:616601bde9fb	1325	static void
AdamGreen	0:616601bde9fb	1326	ipcp_clear_addrs(int unit)
AdamGreen	0:616601bde9fb	1327	{
AdamGreen	0:616601bde9fb	1328	u32_t ouraddr, hisaddr;
AdamGreen	0:616601bde9fb	1329
AdamGreen	0:616601bde9fb	1330	ouraddr = ipcp_gotoptions[unit].ouraddr;
AdamGreen	0:616601bde9fb	1331	hisaddr = ipcp_hisoptions[unit].hisaddr;
AdamGreen	0:616601bde9fb	1332	if (default_route_set[unit]) {
AdamGreen	0:616601bde9fb	1333	cifdefaultroute(unit, ouraddr, hisaddr);
AdamGreen	0:616601bde9fb	1334	default_route_set[unit] = 0;
AdamGreen	0:616601bde9fb	1335	}
AdamGreen	0:616601bde9fb	1336	cifaddr(unit, ouraddr, hisaddr);
AdamGreen	0:616601bde9fb	1337	}
AdamGreen	0:616601bde9fb	1338
AdamGreen	0:616601bde9fb	1339
AdamGreen	0:616601bde9fb	1340	/*
AdamGreen	0:616601bde9fb	1341	* ipcp_finished - possibly shut down the lower layers.
AdamGreen	0:616601bde9fb	1342	*/
AdamGreen	0:616601bde9fb	1343	static void
AdamGreen	0:616601bde9fb	1344	ipcp_finished(fsm *f)
AdamGreen	0:616601bde9fb	1345	{
AdamGreen	0:616601bde9fb	1346	np_finished(f->unit, PPP_IP);
AdamGreen	0:616601bde9fb	1347	}
AdamGreen	0:616601bde9fb	1348
AdamGreen	0:616601bde9fb	1349	#if PPP_ADDITIONAL_CALLBACKS
AdamGreen	0:616601bde9fb	1350	static int
AdamGreen	0:616601bde9fb	1351	ipcp_printpkt(u_char p, int plen, void (printer) (void , char , ...), void *arg)
AdamGreen	0:616601bde9fb	1352	{
AdamGreen	0:616601bde9fb	1353	LWIP_UNUSED_ARG(p);
AdamGreen	0:616601bde9fb	1354	LWIP_UNUSED_ARG(plen);
AdamGreen	0:616601bde9fb	1355	LWIP_UNUSED_ARG(printer);
AdamGreen	0:616601bde9fb	1356	LWIP_UNUSED_ARG(arg);
AdamGreen	0:616601bde9fb	1357	return 0;
AdamGreen	0:616601bde9fb	1358	}
AdamGreen	0:616601bde9fb	1359
AdamGreen	0:616601bde9fb	1360	/*
AdamGreen	0:616601bde9fb	1361	* ip_active_pkt - see if this IP packet is worth bringing the link up for.
AdamGreen	0:616601bde9fb	1362	* We don't bring the link up for IP fragments or for TCP FIN packets
AdamGreen	0:616601bde9fb	1363	* with no data.
AdamGreen	0:616601bde9fb	1364	*/
AdamGreen	0:616601bde9fb	1365	#define IP_HDRLEN 20 /* bytes */
AdamGreen	0:616601bde9fb	1366	#define IP_OFFMASK 0x1fff
AdamGreen	0:616601bde9fb	1367	#define IPPROTO_TCP 6
AdamGreen	0:616601bde9fb	1368	#define TCP_HDRLEN 20
AdamGreen	0:616601bde9fb	1369	#define TH_FIN 0x01
AdamGreen	0:616601bde9fb	1370
AdamGreen	0:616601bde9fb	1371	/*
AdamGreen	0:616601bde9fb	1372	* We use these macros because the IP header may be at an odd address,
AdamGreen	0:616601bde9fb	1373	* and some compilers might use word loads to get th_off or ip_hl.
AdamGreen	0:616601bde9fb	1374	*/
AdamGreen	0:616601bde9fb	1375
AdamGreen	0:616601bde9fb	1376	#define net_short(x) (((x)[0] << 8) + (x)[1])
AdamGreen	0:616601bde9fb	1377	#define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
AdamGreen	0:616601bde9fb	1378	#define get_ipoff(x) net_short((unsigned char *)(x) + 6)
AdamGreen	0:616601bde9fb	1379	#define get_ipproto(x) (((unsigned char *)(x))[9])
AdamGreen	0:616601bde9fb	1380	#define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
AdamGreen	0:616601bde9fb	1381	#define get_tcpflags(x) (((unsigned char *)(x))[13])
AdamGreen	0:616601bde9fb	1382
AdamGreen	0:616601bde9fb	1383	static int
AdamGreen	0:616601bde9fb	1384	ip_active_pkt(u_char *pkt, int len)
AdamGreen	0:616601bde9fb	1385	{
AdamGreen	0:616601bde9fb	1386	u_char *tcp;
AdamGreen	0:616601bde9fb	1387	int hlen;
AdamGreen	0:616601bde9fb	1388
AdamGreen	0:616601bde9fb	1389	len -= PPP_HDRLEN;
AdamGreen	0:616601bde9fb	1390	pkt += PPP_HDRLEN;
AdamGreen	0:616601bde9fb	1391	if (len < IP_HDRLEN) {
AdamGreen	0:616601bde9fb	1392	return 0;
AdamGreen	0:616601bde9fb	1393	}
AdamGreen	0:616601bde9fb	1394	if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
AdamGreen	0:616601bde9fb	1395	return 0;
AdamGreen	0:616601bde9fb	1396	}
AdamGreen	0:616601bde9fb	1397	if (get_ipproto(pkt) != IPPROTO_TCP) {
AdamGreen	0:616601bde9fb	1398	return 1;
AdamGreen	0:616601bde9fb	1399	}
AdamGreen	0:616601bde9fb	1400	hlen = get_iphl(pkt) * 4;
AdamGreen	0:616601bde9fb	1401	if (len < hlen + TCP_HDRLEN) {
AdamGreen	0:616601bde9fb	1402	return 0;
AdamGreen	0:616601bde9fb	1403	}
AdamGreen	0:616601bde9fb	1404	tcp = pkt + hlen;
AdamGreen	0:616601bde9fb	1405	if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
AdamGreen	0:616601bde9fb	1406	return 0;
AdamGreen	0:616601bde9fb	1407	}
AdamGreen	0:616601bde9fb	1408	return 1;
AdamGreen	0:616601bde9fb	1409	}
AdamGreen	0:616601bde9fb	1410	#endif /* PPP_ADDITIONAL_CALLBACKS */
AdamGreen	0:616601bde9fb	1411
AdamGreen	0:616601bde9fb	1412	#endif /* PPP_SUPPORT */

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	23 Feb 2012
Imports:	113
Forks:	0
Commits:	2
Dependents:	0
Dependencies:	4
Followers:	6

NetStack/lwip/netif/ppp/ipcp.c@0:616601bde9fb, 2012-02-23 (annotated)

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