AmpereMeter - Example self-announcing webserver which controls …

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Dirk-Willem van Gulik (NXP/mbed) / Mbed 2 deprecated AmpereMeter

Example self-announcing webserver which controls a servo through a smallHTML userinterface.

lwip/netif/ppp/ipcp.c@0:a259777c45a3, 2010-08-14 (annotated)

Committer:: dirkx
Date:: Sat Aug 14 15:56:01 2010 +0000
Revision:: 0:a259777c45a3

Who changed what in which revision?

User	Revision	Line number	New contents of line
dirkx	0:a259777c45a3	1	/** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
dirkx	0:a259777c45a3	2	dial-on-demand has been stripped. */
dirkx	0:a259777c45a3	3	/*****************************************************************************
dirkx	0:a259777c45a3	4	* ipcp.c - Network PPP IP Control Protocol program file.
dirkx	0:a259777c45a3	5	*
dirkx	0:a259777c45a3	6	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
dirkx	0:a259777c45a3	7	* portions Copyright (c) 1997 by Global Election Systems Inc.
dirkx	0:a259777c45a3	8	*
dirkx	0:a259777c45a3	9	* The authors hereby grant permission to use, copy, modify, distribute,
dirkx	0:a259777c45a3	10	* and license this software and its documentation for any purpose, provided
dirkx	0:a259777c45a3	11	* that existing copyright notices are retained in all copies and that this
dirkx	0:a259777c45a3	12	* notice and the following disclaimer are included verbatim in any
dirkx	0:a259777c45a3	13	* distributions. No written agreement, license, or royalty fee is required
dirkx	0:a259777c45a3	14	* for any of the authorized uses.
dirkx	0:a259777c45a3	15	*
dirkx	0:a259777c45a3	16	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
dirkx	0:a259777c45a3	17	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
dirkx	0:a259777c45a3	18	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
dirkx	0:a259777c45a3	19	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
dirkx	0:a259777c45a3	20	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
dirkx	0:a259777c45a3	21	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
dirkx	0:a259777c45a3	22	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
dirkx	0:a259777c45a3	23	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
dirkx	0:a259777c45a3	24	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
dirkx	0:a259777c45a3	25	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
dirkx	0:a259777c45a3	26	*
dirkx	0:a259777c45a3	27	******************************************************************************
dirkx	0:a259777c45a3	28	* REVISION HISTORY
dirkx	0:a259777c45a3	29	*
dirkx	0:a259777c45a3	30	* 03-01-01 Marc Boucher <marc@mbsi.ca>
dirkx	0:a259777c45a3	31	* Ported to lwIP.
dirkx	0:a259777c45a3	32	* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
dirkx	0:a259777c45a3	33	* Original.
dirkx	0:a259777c45a3	34	*****************************************************************************/
dirkx	0:a259777c45a3	35	/*
dirkx	0:a259777c45a3	36	* ipcp.c - PPP IP Control Protocol.
dirkx	0:a259777c45a3	37	*
dirkx	0:a259777c45a3	38	* Copyright (c) 1989 Carnegie Mellon University.
dirkx	0:a259777c45a3	39	* All rights reserved.
dirkx	0:a259777c45a3	40	*
dirkx	0:a259777c45a3	41	* Redistribution and use in source and binary forms are permitted
dirkx	0:a259777c45a3	42	* provided that the above copyright notice and this paragraph are
dirkx	0:a259777c45a3	43	* duplicated in all such forms and that any documentation,
dirkx	0:a259777c45a3	44	* advertising materials, and other materials related to such
dirkx	0:a259777c45a3	45	* distribution and use acknowledge that the software was developed
dirkx	0:a259777c45a3	46	* by Carnegie Mellon University. The name of the
dirkx	0:a259777c45a3	47	* University may not be used to endorse or promote products derived
dirkx	0:a259777c45a3	48	* from this software without specific prior written permission.
dirkx	0:a259777c45a3	49	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
dirkx	0:a259777c45a3	50	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
dirkx	0:a259777c45a3	51	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
dirkx	0:a259777c45a3	52	*/
dirkx	0:a259777c45a3	53
dirkx	0:a259777c45a3	54	#include "lwip/opt.h"
dirkx	0:a259777c45a3	55
dirkx	0:a259777c45a3	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
dirkx	0:a259777c45a3	57
dirkx	0:a259777c45a3	58	#include "ppp.h"
dirkx	0:a259777c45a3	59	#include "pppdebug.h"
dirkx	0:a259777c45a3	60
dirkx	0:a259777c45a3	61	#include "auth.h"
dirkx	0:a259777c45a3	62	#include "fsm.h"
dirkx	0:a259777c45a3	63	#include "vj.h"
dirkx	0:a259777c45a3	64	#include "ipcp.h"
dirkx	0:a259777c45a3	65
dirkx	0:a259777c45a3	66	#include "lwip/inet.h"
dirkx	0:a259777c45a3	67
dirkx	0:a259777c45a3	68	#include <string.h>
dirkx	0:a259777c45a3	69
dirkx	0:a259777c45a3	70	/* #define OLD_CI_ADDRS 1 / / Support deprecated address negotiation. */
dirkx	0:a259777c45a3	71
dirkx	0:a259777c45a3	72	/* global vars */
dirkx	0:a259777c45a3	73	ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
dirkx	0:a259777c45a3	74	ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
dirkx	0:a259777c45a3	75	ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
dirkx	0:a259777c45a3	76	ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
dirkx	0:a259777c45a3	77
dirkx	0:a259777c45a3	78	/* local vars */
dirkx	0:a259777c45a3	79	static int default_route_set[NUM_PPP]; /* Have set up a default route */
dirkx	0:a259777c45a3	80	static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
dirkx	0:a259777c45a3	81
dirkx	0:a259777c45a3	82
dirkx	0:a259777c45a3	83	/*
dirkx	0:a259777c45a3	84	* Callbacks for fsm code. (CI = Configuration Information)
dirkx	0:a259777c45a3	85	*/
dirkx	0:a259777c45a3	86	static void ipcp_resetci (fsm ); / Reset our CI */
dirkx	0:a259777c45a3	87	static int ipcp_cilen (fsm ); / Return length of our CI */
dirkx	0:a259777c45a3	88	static void ipcp_addci (fsm , u_char , int ); / Add our CI */
dirkx	0:a259777c45a3	89	static int ipcp_ackci (fsm , u_char , int); /* Peer ack'd our CI */
dirkx	0:a259777c45a3	90	static int ipcp_nakci (fsm , u_char , int); /* Peer nak'd our CI */
dirkx	0:a259777c45a3	91	static int ipcp_rejci (fsm , u_char , int); /* Peer rej'd our CI */
dirkx	0:a259777c45a3	92	static int ipcp_reqci (fsm , u_char , int , int); / Rcv CI */
dirkx	0:a259777c45a3	93	static void ipcp_up (fsm ); / We're UP */
dirkx	0:a259777c45a3	94	static void ipcp_down (fsm ); / We're DOWN */
dirkx	0:a259777c45a3	95	#if PPP_ADDITIONAL_CALLBACKS
dirkx	0:a259777c45a3	96	static void ipcp_script (fsm , char ); /* Run an up/down script */
dirkx	0:a259777c45a3	97	#endif
dirkx	0:a259777c45a3	98	static void ipcp_finished (fsm ); / Don't need lower layer */
dirkx	0:a259777c45a3	99
dirkx	0:a259777c45a3	100
dirkx	0:a259777c45a3	101	fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
dirkx	0:a259777c45a3	102
dirkx	0:a259777c45a3	103
dirkx	0:a259777c45a3	104	static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
dirkx	0:a259777c45a3	105	ipcp_resetci, /* Reset our Configuration Information */
dirkx	0:a259777c45a3	106	ipcp_cilen, /* Length of our Configuration Information */
dirkx	0:a259777c45a3	107	ipcp_addci, /* Add our Configuration Information */
dirkx	0:a259777c45a3	108	ipcp_ackci, /* ACK our Configuration Information */
dirkx	0:a259777c45a3	109	ipcp_nakci, /* NAK our Configuration Information */
dirkx	0:a259777c45a3	110	ipcp_rejci, /* Reject our Configuration Information */
dirkx	0:a259777c45a3	111	ipcp_reqci, /* Request peer's Configuration Information */
dirkx	0:a259777c45a3	112	ipcp_up, /* Called when fsm reaches LS_OPENED state */
dirkx	0:a259777c45a3	113	ipcp_down, /* Called when fsm leaves LS_OPENED state */
dirkx	0:a259777c45a3	114	NULL, /* Called when we want the lower layer up */
dirkx	0:a259777c45a3	115	ipcp_finished, /* Called when we want the lower layer down */
dirkx	0:a259777c45a3	116	NULL, /* Called when Protocol-Reject received */
dirkx	0:a259777c45a3	117	NULL, /* Retransmission is necessary */
dirkx	0:a259777c45a3	118	NULL, /* Called to handle protocol-specific codes */
dirkx	0:a259777c45a3	119	"IPCP" /* String name of protocol */
dirkx	0:a259777c45a3	120	};
dirkx	0:a259777c45a3	121
dirkx	0:a259777c45a3	122	/*
dirkx	0:a259777c45a3	123	* Protocol entry points from main code.
dirkx	0:a259777c45a3	124	*/
dirkx	0:a259777c45a3	125	static void ipcp_init (int);
dirkx	0:a259777c45a3	126	static void ipcp_open (int);
dirkx	0:a259777c45a3	127	static void ipcp_close (int, char *);
dirkx	0:a259777c45a3	128	static void ipcp_lowerup (int);
dirkx	0:a259777c45a3	129	static void ipcp_lowerdown (int);
dirkx	0:a259777c45a3	130	static void ipcp_input (int, u_char *, int);
dirkx	0:a259777c45a3	131	static void ipcp_protrej (int);
dirkx	0:a259777c45a3	132
dirkx	0:a259777c45a3	133
dirkx	0:a259777c45a3	134	struct protent ipcp_protent = {
dirkx	0:a259777c45a3	135	PPP_IPCP,
dirkx	0:a259777c45a3	136	ipcp_init,
dirkx	0:a259777c45a3	137	ipcp_input,
dirkx	0:a259777c45a3	138	ipcp_protrej,
dirkx	0:a259777c45a3	139	ipcp_lowerup,
dirkx	0:a259777c45a3	140	ipcp_lowerdown,
dirkx	0:a259777c45a3	141	ipcp_open,
dirkx	0:a259777c45a3	142	ipcp_close,
dirkx	0:a259777c45a3	143	#if PPP_ADDITIONAL_CALLBACKS
dirkx	0:a259777c45a3	144	ipcp_printpkt,
dirkx	0:a259777c45a3	145	NULL,
dirkx	0:a259777c45a3	146	#endif /* PPP_ADDITIONAL_CALLBACKS */
dirkx	0:a259777c45a3	147	1,
dirkx	0:a259777c45a3	148	"IPCP",
dirkx	0:a259777c45a3	149	#if PPP_ADDITIONAL_CALLBACKS
dirkx	0:a259777c45a3	150	ip_check_options,
dirkx	0:a259777c45a3	151	NULL,
dirkx	0:a259777c45a3	152	ip_active_pkt
dirkx	0:a259777c45a3	153	#endif /* PPP_ADDITIONAL_CALLBACKS */
dirkx	0:a259777c45a3	154	};
dirkx	0:a259777c45a3	155
dirkx	0:a259777c45a3	156	static void ipcp_clear_addrs (int);
dirkx	0:a259777c45a3	157
dirkx	0:a259777c45a3	158	/*
dirkx	0:a259777c45a3	159	* Lengths of configuration options.
dirkx	0:a259777c45a3	160	*/
dirkx	0:a259777c45a3	161	#define CILEN_VOID 2
dirkx	0:a259777c45a3	162	#define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
dirkx	0:a259777c45a3	163	#define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
dirkx	0:a259777c45a3	164	#define CILEN_ADDR 6 /* new-style single address option */
dirkx	0:a259777c45a3	165	#define CILEN_ADDRS 10 /* old-style dual address option */
dirkx	0:a259777c45a3	166
dirkx	0:a259777c45a3	167
dirkx	0:a259777c45a3	168	#define CODENAME(x) ((x) == CONFACK ? "ACK" : \
dirkx	0:a259777c45a3	169	(x) == CONFNAK ? "NAK" : "REJ")
dirkx	0:a259777c45a3	170
dirkx	0:a259777c45a3	171
dirkx	0:a259777c45a3	172	/*
dirkx	0:a259777c45a3	173	* ipcp_init - Initialize IPCP.
dirkx	0:a259777c45a3	174	*/
dirkx	0:a259777c45a3	175	static void
dirkx	0:a259777c45a3	176	ipcp_init(int unit)
dirkx	0:a259777c45a3	177	{
dirkx	0:a259777c45a3	178	fsm *f = &ipcp_fsm[unit];
dirkx	0:a259777c45a3	179	ipcp_options *wo = &ipcp_wantoptions[unit];
dirkx	0:a259777c45a3	180	ipcp_options *ao = &ipcp_allowoptions[unit];
dirkx	0:a259777c45a3	181
dirkx	0:a259777c45a3	182	f->unit = unit;
dirkx	0:a259777c45a3	183	f->protocol = PPP_IPCP;
dirkx	0:a259777c45a3	184	f->callbacks = &ipcp_callbacks;
dirkx	0:a259777c45a3	185	fsm_init(&ipcp_fsm[unit]);
dirkx	0:a259777c45a3	186
dirkx	0:a259777c45a3	187	memset(wo, 0, sizeof(*wo));
dirkx	0:a259777c45a3	188	memset(ao, 0, sizeof(*ao));
dirkx	0:a259777c45a3	189
dirkx	0:a259777c45a3	190	wo->neg_addr = 1;
dirkx	0:a259777c45a3	191	wo->ouraddr = 0;
dirkx	0:a259777c45a3	192	#if VJ_SUPPORT
dirkx	0:a259777c45a3	193	wo->neg_vj = 1;
dirkx	0:a259777c45a3	194	#else /* VJ_SUPPORT */
dirkx	0:a259777c45a3	195	wo->neg_vj = 0;
dirkx	0:a259777c45a3	196	#endif /* VJ_SUPPORT */
dirkx	0:a259777c45a3	197	wo->vj_protocol = IPCP_VJ_COMP;
dirkx	0:a259777c45a3	198	wo->maxslotindex = MAX_SLOTS - 1;
dirkx	0:a259777c45a3	199	wo->cflag = 0;
dirkx	0:a259777c45a3	200	wo->default_route = 1;
dirkx	0:a259777c45a3	201
dirkx	0:a259777c45a3	202	ao->neg_addr = 1;
dirkx	0:a259777c45a3	203	#if VJ_SUPPORT
dirkx	0:a259777c45a3	204	ao->neg_vj = 1;
dirkx	0:a259777c45a3	205	#else /* VJ_SUPPORT */
dirkx	0:a259777c45a3	206	ao->neg_vj = 0;
dirkx	0:a259777c45a3	207	#endif /* VJ_SUPPORT */
dirkx	0:a259777c45a3	208	ao->maxslotindex = MAX_SLOTS - 1;
dirkx	0:a259777c45a3	209	ao->cflag = 1;
dirkx	0:a259777c45a3	210	ao->default_route = 1;
dirkx	0:a259777c45a3	211	}
dirkx	0:a259777c45a3	212
dirkx	0:a259777c45a3	213
dirkx	0:a259777c45a3	214	/*
dirkx	0:a259777c45a3	215	* ipcp_open - IPCP is allowed to come up.
dirkx	0:a259777c45a3	216	*/
dirkx	0:a259777c45a3	217	static void
dirkx	0:a259777c45a3	218	ipcp_open(int unit)
dirkx	0:a259777c45a3	219	{
dirkx	0:a259777c45a3	220	fsm_open(&ipcp_fsm[unit]);
dirkx	0:a259777c45a3	221	}
dirkx	0:a259777c45a3	222
dirkx	0:a259777c45a3	223
dirkx	0:a259777c45a3	224	/*
dirkx	0:a259777c45a3	225	* ipcp_close - Take IPCP down.
dirkx	0:a259777c45a3	226	*/
dirkx	0:a259777c45a3	227	static void
dirkx	0:a259777c45a3	228	ipcp_close(int unit, char *reason)
dirkx	0:a259777c45a3	229	{
dirkx	0:a259777c45a3	230	fsm_close(&ipcp_fsm[unit], reason);
dirkx	0:a259777c45a3	231	}
dirkx	0:a259777c45a3	232
dirkx	0:a259777c45a3	233
dirkx	0:a259777c45a3	234	/*
dirkx	0:a259777c45a3	235	* ipcp_lowerup - The lower layer is up.
dirkx	0:a259777c45a3	236	*/
dirkx	0:a259777c45a3	237	static void
dirkx	0:a259777c45a3	238	ipcp_lowerup(int unit)
dirkx	0:a259777c45a3	239	{
dirkx	0:a259777c45a3	240	fsm_lowerup(&ipcp_fsm[unit]);
dirkx	0:a259777c45a3	241	}
dirkx	0:a259777c45a3	242
dirkx	0:a259777c45a3	243
dirkx	0:a259777c45a3	244	/*
dirkx	0:a259777c45a3	245	* ipcp_lowerdown - The lower layer is down.
dirkx	0:a259777c45a3	246	*/
dirkx	0:a259777c45a3	247	static void
dirkx	0:a259777c45a3	248	ipcp_lowerdown(int unit)
dirkx	0:a259777c45a3	249	{
dirkx	0:a259777c45a3	250	fsm_lowerdown(&ipcp_fsm[unit]);
dirkx	0:a259777c45a3	251	}
dirkx	0:a259777c45a3	252
dirkx	0:a259777c45a3	253
dirkx	0:a259777c45a3	254	/*
dirkx	0:a259777c45a3	255	* ipcp_input - Input IPCP packet.
dirkx	0:a259777c45a3	256	*/
dirkx	0:a259777c45a3	257	static void
dirkx	0:a259777c45a3	258	ipcp_input(int unit, u_char *p, int len)
dirkx	0:a259777c45a3	259	{
dirkx	0:a259777c45a3	260	fsm_input(&ipcp_fsm[unit], p, len);
dirkx	0:a259777c45a3	261	}
dirkx	0:a259777c45a3	262
dirkx	0:a259777c45a3	263
dirkx	0:a259777c45a3	264	/*
dirkx	0:a259777c45a3	265	* ipcp_protrej - A Protocol-Reject was received for IPCP.
dirkx	0:a259777c45a3	266	*
dirkx	0:a259777c45a3	267	* Pretend the lower layer went down, so we shut up.
dirkx	0:a259777c45a3	268	*/
dirkx	0:a259777c45a3	269	static void
dirkx	0:a259777c45a3	270	ipcp_protrej(int unit)
dirkx	0:a259777c45a3	271	{
dirkx	0:a259777c45a3	272	fsm_lowerdown(&ipcp_fsm[unit]);
dirkx	0:a259777c45a3	273	}
dirkx	0:a259777c45a3	274
dirkx	0:a259777c45a3	275
dirkx	0:a259777c45a3	276	/*
dirkx	0:a259777c45a3	277	* ipcp_resetci - Reset our CI.
dirkx	0:a259777c45a3	278	*/
dirkx	0:a259777c45a3	279	static void
dirkx	0:a259777c45a3	280	ipcp_resetci(fsm *f)
dirkx	0:a259777c45a3	281	{
dirkx	0:a259777c45a3	282	ipcp_options *wo = &ipcp_wantoptions[f->unit];
dirkx	0:a259777c45a3	283
dirkx	0:a259777c45a3	284	wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
dirkx	0:a259777c45a3	285	if (wo->ouraddr == 0) {
dirkx	0:a259777c45a3	286	wo->accept_local = 1;
dirkx	0:a259777c45a3	287	}
dirkx	0:a259777c45a3	288	if (wo->hisaddr == 0) {
dirkx	0:a259777c45a3	289	wo->accept_remote = 1;
dirkx	0:a259777c45a3	290	}
dirkx	0:a259777c45a3	291	/* Request DNS addresses from the peer */
dirkx	0:a259777c45a3	292	wo->req_dns1 = ppp_settings.usepeerdns;
dirkx	0:a259777c45a3	293	wo->req_dns2 = ppp_settings.usepeerdns;
dirkx	0:a259777c45a3	294	ipcp_gotoptions[f->unit] = *wo;
dirkx	0:a259777c45a3	295	cis_received[f->unit] = 0;
dirkx	0:a259777c45a3	296	}
dirkx	0:a259777c45a3	297
dirkx	0:a259777c45a3	298
dirkx	0:a259777c45a3	299	/*
dirkx	0:a259777c45a3	300	* ipcp_cilen - Return length of our CI.
dirkx	0:a259777c45a3	301	*/
dirkx	0:a259777c45a3	302	static int
dirkx	0:a259777c45a3	303	ipcp_cilen(fsm *f)
dirkx	0:a259777c45a3	304	{
dirkx	0:a259777c45a3	305	ipcp_options *go = &ipcp_gotoptions[f->unit];
dirkx	0:a259777c45a3	306	ipcp_options *wo = &ipcp_wantoptions[f->unit];
dirkx	0:a259777c45a3	307	ipcp_options *ho = &ipcp_hisoptions[f->unit];
dirkx	0:a259777c45a3	308
dirkx	0:a259777c45a3	309	#define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
dirkx	0:a259777c45a3	310	#define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
dirkx	0:a259777c45a3	311	#define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
dirkx	0:a259777c45a3	312
dirkx	0:a259777c45a3	313	/*
dirkx	0:a259777c45a3	314	* First see if we want to change our options to the old
dirkx	0:a259777c45a3	315	* forms because we have received old forms from the peer.
dirkx	0:a259777c45a3	316	*/
dirkx	0:a259777c45a3	317	if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
dirkx	0:a259777c45a3	318	/* use the old style of address negotiation */
dirkx	0:a259777c45a3	319	go->neg_addr = 1;
dirkx	0:a259777c45a3	320	go->old_addrs = 1;
dirkx	0:a259777c45a3	321	}
dirkx	0:a259777c45a3	322	if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
dirkx	0:a259777c45a3	323	/* try an older style of VJ negotiation */
dirkx	0:a259777c45a3	324	if (cis_received[f->unit] == 0) {
dirkx	0:a259777c45a3	325	/* keep trying the new style until we see some CI from the peer */
dirkx	0:a259777c45a3	326	go->neg_vj = 1;
dirkx	0:a259777c45a3	327	} else {
dirkx	0:a259777c45a3	328	/* use the old style only if the peer did */
dirkx	0:a259777c45a3	329	if (ho->neg_vj && ho->old_vj) {
dirkx	0:a259777c45a3	330	go->neg_vj = 1;
dirkx	0:a259777c45a3	331	go->old_vj = 1;
dirkx	0:a259777c45a3	332	go->vj_protocol = ho->vj_protocol;
dirkx	0:a259777c45a3	333	}
dirkx	0:a259777c45a3	334	}
dirkx	0:a259777c45a3	335	}
dirkx	0:a259777c45a3	336
dirkx	0:a259777c45a3	337	return (LENCIADDR(go->neg_addr, go->old_addrs) +
dirkx	0:a259777c45a3	338	LENCIVJ(go->neg_vj, go->old_vj) +
dirkx	0:a259777c45a3	339	LENCIDNS(go->req_dns1) +
dirkx	0:a259777c45a3	340	LENCIDNS(go->req_dns2));
dirkx	0:a259777c45a3	341	}
dirkx	0:a259777c45a3	342
dirkx	0:a259777c45a3	343
dirkx	0:a259777c45a3	344	/*
dirkx	0:a259777c45a3	345	* ipcp_addci - Add our desired CIs to a packet.
dirkx	0:a259777c45a3	346	*/
dirkx	0:a259777c45a3	347	static void
dirkx	0:a259777c45a3	348	ipcp_addci(fsm f, u_char ucp, int *lenp)
dirkx	0:a259777c45a3	349	{
dirkx	0:a259777c45a3	350	ipcp_options *go = &ipcp_gotoptions[f->unit];
dirkx	0:a259777c45a3	351	int len = *lenp;
dirkx	0:a259777c45a3	352
dirkx	0:a259777c45a3	353	#define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
dirkx	0:a259777c45a3	354	if (neg) { \
dirkx	0:a259777c45a3	355	int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
dirkx	0:a259777c45a3	356	if (len >= vjlen) { \
dirkx	0:a259777c45a3	357	PUTCHAR(opt, ucp); \
dirkx	0:a259777c45a3	358	PUTCHAR(vjlen, ucp); \
dirkx	0:a259777c45a3	359	PUTSHORT(val, ucp); \
dirkx	0:a259777c45a3	360	if (!old) { \
dirkx	0:a259777c45a3	361	PUTCHAR(maxslotindex, ucp); \
dirkx	0:a259777c45a3	362	PUTCHAR(cflag, ucp); \
dirkx	0:a259777c45a3	363	} \
dirkx	0:a259777c45a3	364	len -= vjlen; \
dirkx	0:a259777c45a3	365	} else { \
dirkx	0:a259777c45a3	366	neg = 0; \
dirkx	0:a259777c45a3	367	} \
dirkx	0:a259777c45a3	368	}
dirkx	0:a259777c45a3	369
dirkx	0:a259777c45a3	370	#define ADDCIADDR(opt, neg, old, val1, val2) \
dirkx	0:a259777c45a3	371	if (neg) { \
dirkx	0:a259777c45a3	372	int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
dirkx	0:a259777c45a3	373	if (len >= addrlen) { \
dirkx	0:a259777c45a3	374	u32_t l; \
dirkx	0:a259777c45a3	375	PUTCHAR(opt, ucp); \
dirkx	0:a259777c45a3	376	PUTCHAR(addrlen, ucp); \
dirkx	0:a259777c45a3	377	l = ntohl(val1); \
dirkx	0:a259777c45a3	378	PUTLONG(l, ucp); \
dirkx	0:a259777c45a3	379	if (old) { \
dirkx	0:a259777c45a3	380	l = ntohl(val2); \
dirkx	0:a259777c45a3	381	PUTLONG(l, ucp); \
dirkx	0:a259777c45a3	382	} \
dirkx	0:a259777c45a3	383	len -= addrlen; \
dirkx	0:a259777c45a3	384	} else { \
dirkx	0:a259777c45a3	385	neg = 0; \
dirkx	0:a259777c45a3	386	} \
dirkx	0:a259777c45a3	387	}
dirkx	0:a259777c45a3	388
dirkx	0:a259777c45a3	389	#define ADDCIDNS(opt, neg, addr) \
dirkx	0:a259777c45a3	390	if (neg) { \
dirkx	0:a259777c45a3	391	if (len >= CILEN_ADDR) { \
dirkx	0:a259777c45a3	392	u32_t l; \
dirkx	0:a259777c45a3	393	PUTCHAR(opt, ucp); \
dirkx	0:a259777c45a3	394	PUTCHAR(CILEN_ADDR, ucp); \
dirkx	0:a259777c45a3	395	l = ntohl(addr); \
dirkx	0:a259777c45a3	396	PUTLONG(l, ucp); \
dirkx	0:a259777c45a3	397	len -= CILEN_ADDR; \
dirkx	0:a259777c45a3	398	} else { \
dirkx	0:a259777c45a3	399	neg = 0; \
dirkx	0:a259777c45a3	400	} \
dirkx	0:a259777c45a3	401	}
dirkx	0:a259777c45a3	402
dirkx	0:a259777c45a3	403	ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
dirkx	0:a259777c45a3	404	go->old_addrs, go->ouraddr, go->hisaddr);
dirkx	0:a259777c45a3	405
dirkx	0:a259777c45a3	406	ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
dirkx	0:a259777c45a3	407	go->maxslotindex, go->cflag);
dirkx	0:a259777c45a3	408
dirkx	0:a259777c45a3	409	ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
dirkx	0:a259777c45a3	410
dirkx	0:a259777c45a3	411	ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
dirkx	0:a259777c45a3	412
dirkx	0:a259777c45a3	413	*lenp -= len;
dirkx	0:a259777c45a3	414	}
dirkx	0:a259777c45a3	415
dirkx	0:a259777c45a3	416
dirkx	0:a259777c45a3	417	/*
dirkx	0:a259777c45a3	418	* ipcp_ackci - Ack our CIs.
dirkx	0:a259777c45a3	419	*
dirkx	0:a259777c45a3	420	* Returns:
dirkx	0:a259777c45a3	421	* 0 - Ack was bad.
dirkx	0:a259777c45a3	422	* 1 - Ack was good.
dirkx	0:a259777c45a3	423	*/
dirkx	0:a259777c45a3	424	static int
dirkx	0:a259777c45a3	425	ipcp_ackci(fsm f, u_char p, int len)
dirkx	0:a259777c45a3	426	{
dirkx	0:a259777c45a3	427	ipcp_options *go = &ipcp_gotoptions[f->unit];
dirkx	0:a259777c45a3	428	u_short cilen, citype, cishort;
dirkx	0:a259777c45a3	429	u32_t cilong;
dirkx	0:a259777c45a3	430	u_char cimaxslotindex, cicflag;
dirkx	0:a259777c45a3	431
dirkx	0:a259777c45a3	432	/*
dirkx	0:a259777c45a3	433	* CIs must be in exactly the same order that we sent...
dirkx	0:a259777c45a3	434	* Check packet length and CI length at each step.
dirkx	0:a259777c45a3	435	* If we find any deviations, then this packet is bad.
dirkx	0:a259777c45a3	436	*/
dirkx	0:a259777c45a3	437
dirkx	0:a259777c45a3	438	#define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
dirkx	0:a259777c45a3	439	if (neg) { \
dirkx	0:a259777c45a3	440	int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
dirkx	0:a259777c45a3	441	if ((len -= vjlen) < 0) { \
dirkx	0:a259777c45a3	442	goto bad; \
dirkx	0:a259777c45a3	443	} \
dirkx	0:a259777c45a3	444	GETCHAR(citype, p); \
dirkx	0:a259777c45a3	445	GETCHAR(cilen, p); \
dirkx	0:a259777c45a3	446	if (cilen != vjlen \|\| \
dirkx	0:a259777c45a3	447	citype != opt) { \
dirkx	0:a259777c45a3	448	goto bad; \
dirkx	0:a259777c45a3	449	} \
dirkx	0:a259777c45a3	450	GETSHORT(cishort, p); \
dirkx	0:a259777c45a3	451	if (cishort != val) { \
dirkx	0:a259777c45a3	452	goto bad; \
dirkx	0:a259777c45a3	453	} \
dirkx	0:a259777c45a3	454	if (!old) { \
dirkx	0:a259777c45a3	455	GETCHAR(cimaxslotindex, p); \
dirkx	0:a259777c45a3	456	if (cimaxslotindex != maxslotindex) { \
dirkx	0:a259777c45a3	457	goto bad; \
dirkx	0:a259777c45a3	458	} \
dirkx	0:a259777c45a3	459	GETCHAR(cicflag, p); \
dirkx	0:a259777c45a3	460	if (cicflag != cflag) { \
dirkx	0:a259777c45a3	461	goto bad; \
dirkx	0:a259777c45a3	462	} \
dirkx	0:a259777c45a3	463	} \
dirkx	0:a259777c45a3	464	}
dirkx	0:a259777c45a3	465
dirkx	0:a259777c45a3	466	#define ACKCIADDR(opt, neg, old, val1, val2) \
dirkx	0:a259777c45a3	467	if (neg) { \
dirkx	0:a259777c45a3	468	int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
dirkx	0:a259777c45a3	469	u32_t l; \
dirkx	0:a259777c45a3	470	if ((len -= addrlen) < 0) { \
dirkx	0:a259777c45a3	471	goto bad; \
dirkx	0:a259777c45a3	472	} \
dirkx	0:a259777c45a3	473	GETCHAR(citype, p); \
dirkx	0:a259777c45a3	474	GETCHAR(cilen, p); \
dirkx	0:a259777c45a3	475	if (cilen != addrlen \|\| \
dirkx	0:a259777c45a3	476	citype != opt) { \
dirkx	0:a259777c45a3	477	goto bad; \
dirkx	0:a259777c45a3	478	} \
dirkx	0:a259777c45a3	479	GETLONG(l, p); \
dirkx	0:a259777c45a3	480	cilong = htonl(l); \
dirkx	0:a259777c45a3	481	if (val1 != cilong) { \
dirkx	0:a259777c45a3	482	goto bad; \
dirkx	0:a259777c45a3	483	} \
dirkx	0:a259777c45a3	484	if (old) { \
dirkx	0:a259777c45a3	485	GETLONG(l, p); \
dirkx	0:a259777c45a3	486	cilong = htonl(l); \
dirkx	0:a259777c45a3	487	if (val2 != cilong) { \
dirkx	0:a259777c45a3	488	goto bad; \
dirkx	0:a259777c45a3	489	} \
dirkx	0:a259777c45a3	490	} \
dirkx	0:a259777c45a3	491	}
dirkx	0:a259777c45a3	492
dirkx	0:a259777c45a3	493	#define ACKCIDNS(opt, neg, addr) \
dirkx	0:a259777c45a3	494	if (neg) { \
dirkx	0:a259777c45a3	495	u32_t l; \
dirkx	0:a259777c45a3	496	if ((len -= CILEN_ADDR) < 0) { \
dirkx	0:a259777c45a3	497	goto bad; \
dirkx	0:a259777c45a3	498	} \
dirkx	0:a259777c45a3	499	GETCHAR(citype, p); \
dirkx	0:a259777c45a3	500	GETCHAR(cilen, p); \
dirkx	0:a259777c45a3	501	if (cilen != CILEN_ADDR \|\| \
dirkx	0:a259777c45a3	502	citype != opt) { \
dirkx	0:a259777c45a3	503	goto bad; \
dirkx	0:a259777c45a3	504	} \
dirkx	0:a259777c45a3	505	GETLONG(l, p); \
dirkx	0:a259777c45a3	506	cilong = htonl(l); \
dirkx	0:a259777c45a3	507	if (addr != cilong) { \
dirkx	0:a259777c45a3	508	goto bad; \
dirkx	0:a259777c45a3	509	} \
dirkx	0:a259777c45a3	510	}
dirkx	0:a259777c45a3	511
dirkx	0:a259777c45a3	512	ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
dirkx	0:a259777c45a3	513	go->old_addrs, go->ouraddr, go->hisaddr);
dirkx	0:a259777c45a3	514
dirkx	0:a259777c45a3	515	ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
dirkx	0:a259777c45a3	516	go->maxslotindex, go->cflag);
dirkx	0:a259777c45a3	517
dirkx	0:a259777c45a3	518	ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
dirkx	0:a259777c45a3	519
dirkx	0:a259777c45a3	520	ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
dirkx	0:a259777c45a3	521
dirkx	0:a259777c45a3	522	/*
dirkx	0:a259777c45a3	523	* If there are any remaining CIs, then this packet is bad.
dirkx	0:a259777c45a3	524	*/
dirkx	0:a259777c45a3	525	if (len != 0) {
dirkx	0:a259777c45a3	526	goto bad;
dirkx	0:a259777c45a3	527	}
dirkx	0:a259777c45a3	528	return (1);
dirkx	0:a259777c45a3	529
dirkx	0:a259777c45a3	530	bad:
dirkx	0:a259777c45a3	531	IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
dirkx	0:a259777c45a3	532	return (0);
dirkx	0:a259777c45a3	533	}
dirkx	0:a259777c45a3	534
dirkx	0:a259777c45a3	535	/*
dirkx	0:a259777c45a3	536	* ipcp_nakci - Peer has sent a NAK for some of our CIs.
dirkx	0:a259777c45a3	537	* This should not modify any state if the Nak is bad
dirkx	0:a259777c45a3	538	* or if IPCP is in the LS_OPENED state.
dirkx	0:a259777c45a3	539	*
dirkx	0:a259777c45a3	540	* Returns:
dirkx	0:a259777c45a3	541	* 0 - Nak was bad.
dirkx	0:a259777c45a3	542	* 1 - Nak was good.
dirkx	0:a259777c45a3	543	*/
dirkx	0:a259777c45a3	544	static int
dirkx	0:a259777c45a3	545	ipcp_nakci(fsm f, u_char p, int len)
dirkx	0:a259777c45a3	546	{
dirkx	0:a259777c45a3	547	ipcp_options *go = &ipcp_gotoptions[f->unit];
dirkx	0:a259777c45a3	548	u_char cimaxslotindex, cicflag;
dirkx	0:a259777c45a3	549	u_char citype, cilen, *next;
dirkx	0:a259777c45a3	550	u_short cishort;
dirkx	0:a259777c45a3	551	u32_t ciaddr1, ciaddr2, l, cidnsaddr;
dirkx	0:a259777c45a3	552	ipcp_options no; /* options we've seen Naks for */
dirkx	0:a259777c45a3	553	ipcp_options try; /* options to request next time */
dirkx	0:a259777c45a3	554
dirkx	0:a259777c45a3	555	BZERO(&no, sizeof(no));
dirkx	0:a259777c45a3	556	try = *go;
dirkx	0:a259777c45a3	557
dirkx	0:a259777c45a3	558	/*
dirkx	0:a259777c45a3	559	* Any Nak'd CIs must be in exactly the same order that we sent.
dirkx	0:a259777c45a3	560	* Check packet length and CI length at each step.
dirkx	0:a259777c45a3	561	* If we find any deviations, then this packet is bad.
dirkx	0:a259777c45a3	562	*/
dirkx	0:a259777c45a3	563	#define NAKCIADDR(opt, neg, old, code) \
dirkx	0:a259777c45a3	564	if (go->neg && \
dirkx	0:a259777c45a3	565	len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
dirkx	0:a259777c45a3	566	p[1] == cilen && \
dirkx	0:a259777c45a3	567	p[0] == opt) { \
dirkx	0:a259777c45a3	568	len -= cilen; \
dirkx	0:a259777c45a3	569	INCPTR(2, p); \
dirkx	0:a259777c45a3	570	GETLONG(l, p); \
dirkx	0:a259777c45a3	571	ciaddr1 = htonl(l); \
dirkx	0:a259777c45a3	572	if (old) { \
dirkx	0:a259777c45a3	573	GETLONG(l, p); \
dirkx	0:a259777c45a3	574	ciaddr2 = htonl(l); \
dirkx	0:a259777c45a3	575	no.old_addrs = 1; \
dirkx	0:a259777c45a3	576	} else { \
dirkx	0:a259777c45a3	577	ciaddr2 = 0; \
dirkx	0:a259777c45a3	578	} \
dirkx	0:a259777c45a3	579	no.neg = 1; \
dirkx	0:a259777c45a3	580	code \
dirkx	0:a259777c45a3	581	}
dirkx	0:a259777c45a3	582
dirkx	0:a259777c45a3	583	#define NAKCIVJ(opt, neg, code) \
dirkx	0:a259777c45a3	584	if (go->neg && \
dirkx	0:a259777c45a3	585	((cilen = p[1]) == CILEN_COMPRESS \|\| cilen == CILEN_VJ) && \
dirkx	0:a259777c45a3	586	len >= cilen && \
dirkx	0:a259777c45a3	587	p[0] == opt) { \
dirkx	0:a259777c45a3	588	len -= cilen; \
dirkx	0:a259777c45a3	589	INCPTR(2, p); \
dirkx	0:a259777c45a3	590	GETSHORT(cishort, p); \
dirkx	0:a259777c45a3	591	no.neg = 1; \
dirkx	0:a259777c45a3	592	code \
dirkx	0:a259777c45a3	593	}
dirkx	0:a259777c45a3	594
dirkx	0:a259777c45a3	595	#define NAKCIDNS(opt, neg, code) \
dirkx	0:a259777c45a3	596	if (go->neg && \
dirkx	0:a259777c45a3	597	((cilen = p[1]) == CILEN_ADDR) && \
dirkx	0:a259777c45a3	598	len >= cilen && \
dirkx	0:a259777c45a3	599	p[0] == opt) { \
dirkx	0:a259777c45a3	600	len -= cilen; \
dirkx	0:a259777c45a3	601	INCPTR(2, p); \
dirkx	0:a259777c45a3	602	GETLONG(l, p); \
dirkx	0:a259777c45a3	603	cidnsaddr = htonl(l); \
dirkx	0:a259777c45a3	604	no.neg = 1; \
dirkx	0:a259777c45a3	605	code \
dirkx	0:a259777c45a3	606	}
dirkx	0:a259777c45a3	607
dirkx	0:a259777c45a3	608	/*
dirkx	0:a259777c45a3	609	* Accept the peer's idea of {our,his} address, if different
dirkx	0:a259777c45a3	610	* from our idea, only if the accept_{local,remote} flag is set.
dirkx	0:a259777c45a3	611	*/
dirkx	0:a259777c45a3	612	NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
dirkx	0:a259777c45a3	613	if (go->accept_local && ciaddr1) { /* Do we know our address? */
dirkx	0:a259777c45a3	614	try.ouraddr = ciaddr1;
dirkx	0:a259777c45a3	615	IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
dirkx	0:a259777c45a3	616	inet_ntoa(ciaddr1)));
dirkx	0:a259777c45a3	617	}
dirkx	0:a259777c45a3	618	if (go->accept_remote && ciaddr2) { /* Does he know his? */
dirkx	0:a259777c45a3	619	try.hisaddr = ciaddr2;
dirkx	0:a259777c45a3	620	IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
dirkx	0:a259777c45a3	621	inet_ntoa(ciaddr2)));
dirkx	0:a259777c45a3	622	}
dirkx	0:a259777c45a3	623	);
dirkx	0:a259777c45a3	624
dirkx	0:a259777c45a3	625	/*
dirkx	0:a259777c45a3	626	* Accept the peer's value of maxslotindex provided that it
dirkx	0:a259777c45a3	627	* is less than what we asked for. Turn off slot-ID compression
dirkx	0:a259777c45a3	628	* if the peer wants. Send old-style compress-type option if
dirkx	0:a259777c45a3	629	* the peer wants.
dirkx	0:a259777c45a3	630	*/
dirkx	0:a259777c45a3	631	NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
dirkx	0:a259777c45a3	632	if (cilen == CILEN_VJ) {
dirkx	0:a259777c45a3	633	GETCHAR(cimaxslotindex, p);
dirkx	0:a259777c45a3	634	GETCHAR(cicflag, p);
dirkx	0:a259777c45a3	635	if (cishort == IPCP_VJ_COMP) {
dirkx	0:a259777c45a3	636	try.old_vj = 0;
dirkx	0:a259777c45a3	637	if (cimaxslotindex < go->maxslotindex) {
dirkx	0:a259777c45a3	638	try.maxslotindex = cimaxslotindex;
dirkx	0:a259777c45a3	639	}
dirkx	0:a259777c45a3	640	if (!cicflag) {
dirkx	0:a259777c45a3	641	try.cflag = 0;
dirkx	0:a259777c45a3	642	}
dirkx	0:a259777c45a3	643	} else {
dirkx	0:a259777c45a3	644	try.neg_vj = 0;
dirkx	0:a259777c45a3	645	}
dirkx	0:a259777c45a3	646	} else {
dirkx	0:a259777c45a3	647	if (cishort == IPCP_VJ_COMP \|\| cishort == IPCP_VJ_COMP_OLD) {
dirkx	0:a259777c45a3	648	try.old_vj = 1;
dirkx	0:a259777c45a3	649	try.vj_protocol = cishort;
dirkx	0:a259777c45a3	650	} else {
dirkx	0:a259777c45a3	651	try.neg_vj = 0;
dirkx	0:a259777c45a3	652	}
dirkx	0:a259777c45a3	653	}
dirkx	0:a259777c45a3	654	);
dirkx	0:a259777c45a3	655
dirkx	0:a259777c45a3	656	NAKCIDNS(CI_MS_DNS1, req_dns1,
dirkx	0:a259777c45a3	657	try.dnsaddr[0] = cidnsaddr;
dirkx	0:a259777c45a3	658	IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
dirkx	0:a259777c45a3	659	);
dirkx	0:a259777c45a3	660
dirkx	0:a259777c45a3	661	NAKCIDNS(CI_MS_DNS2, req_dns2,
dirkx	0:a259777c45a3	662	try.dnsaddr[1] = cidnsaddr;
dirkx	0:a259777c45a3	663	IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
dirkx	0:a259777c45a3	664	);
dirkx	0:a259777c45a3	665
dirkx	0:a259777c45a3	666	/*
dirkx	0:a259777c45a3	667	* There may be remaining CIs, if the peer is requesting negotiation
dirkx	0:a259777c45a3	668	* on an option that we didn't include in our request packet.
dirkx	0:a259777c45a3	669	* If they want to negotiate about IP addresses, we comply.
dirkx	0:a259777c45a3	670	* If they want us to ask for compression, we refuse.
dirkx	0:a259777c45a3	671	*/
dirkx	0:a259777c45a3	672	while (len > CILEN_VOID) {
dirkx	0:a259777c45a3	673	GETCHAR(citype, p);
dirkx	0:a259777c45a3	674	GETCHAR(cilen, p);
dirkx	0:a259777c45a3	675	if( (len -= cilen) < 0 ) {
dirkx	0:a259777c45a3	676	goto bad;
dirkx	0:a259777c45a3	677	}
dirkx	0:a259777c45a3	678	next = p + cilen - 2;
dirkx	0:a259777c45a3	679
dirkx	0:a259777c45a3	680	switch (citype) {
dirkx	0:a259777c45a3	681	case CI_COMPRESSTYPE:
dirkx	0:a259777c45a3	682	if (go->neg_vj \|\| no.neg_vj \|\|
dirkx	0:a259777c45a3	683	(cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
dirkx	0:a259777c45a3	684	goto bad;
dirkx	0:a259777c45a3	685	}
dirkx	0:a259777c45a3	686	no.neg_vj = 1;
dirkx	0:a259777c45a3	687	break;
dirkx	0:a259777c45a3	688	case CI_ADDRS:
dirkx	0:a259777c45a3	689	if ((go->neg_addr && go->old_addrs) \|\| no.old_addrs
dirkx	0:a259777c45a3	690	\|\| cilen != CILEN_ADDRS) {
dirkx	0:a259777c45a3	691	goto bad;
dirkx	0:a259777c45a3	692	}
dirkx	0:a259777c45a3	693	try.neg_addr = 1;
dirkx	0:a259777c45a3	694	try.old_addrs = 1;
dirkx	0:a259777c45a3	695	GETLONG(l, p);
dirkx	0:a259777c45a3	696	ciaddr1 = htonl(l);
dirkx	0:a259777c45a3	697	if (ciaddr1 && go->accept_local) {
dirkx	0:a259777c45a3	698	try.ouraddr = ciaddr1;
dirkx	0:a259777c45a3	699	}
dirkx	0:a259777c45a3	700	GETLONG(l, p);
dirkx	0:a259777c45a3	701	ciaddr2 = htonl(l);
dirkx	0:a259777c45a3	702	if (ciaddr2 && go->accept_remote) {
dirkx	0:a259777c45a3	703	try.hisaddr = ciaddr2;
dirkx	0:a259777c45a3	704	}
dirkx	0:a259777c45a3	705	no.old_addrs = 1;
dirkx	0:a259777c45a3	706	break;
dirkx	0:a259777c45a3	707	case CI_ADDR:
dirkx	0:a259777c45a3	708	if (go->neg_addr \|\| no.neg_addr \|\| cilen != CILEN_ADDR) {
dirkx	0:a259777c45a3	709	goto bad;
dirkx	0:a259777c45a3	710	}
dirkx	0:a259777c45a3	711	try.old_addrs = 0;
dirkx	0:a259777c45a3	712	GETLONG(l, p);
dirkx	0:a259777c45a3	713	ciaddr1 = htonl(l);
dirkx	0:a259777c45a3	714	if (ciaddr1 && go->accept_local) {
dirkx	0:a259777c45a3	715	try.ouraddr = ciaddr1;
dirkx	0:a259777c45a3	716	}
dirkx	0:a259777c45a3	717	if (try.ouraddr != 0) {
dirkx	0:a259777c45a3	718	try.neg_addr = 1;
dirkx	0:a259777c45a3	719	}
dirkx	0:a259777c45a3	720	no.neg_addr = 1;
dirkx	0:a259777c45a3	721	break;
dirkx	0:a259777c45a3	722	}
dirkx	0:a259777c45a3	723	p = next;
dirkx	0:a259777c45a3	724	}
dirkx	0:a259777c45a3	725
dirkx	0:a259777c45a3	726	/* If there is still anything left, this packet is bad. */
dirkx	0:a259777c45a3	727	if (len != 0) {
dirkx	0:a259777c45a3	728	goto bad;
dirkx	0:a259777c45a3	729	}
dirkx	0:a259777c45a3	730
dirkx	0:a259777c45a3	731	/*
dirkx	0:a259777c45a3	732	* OK, the Nak is good. Now we can update state.
dirkx	0:a259777c45a3	733	*/
dirkx	0:a259777c45a3	734	if (f->state != LS_OPENED) {
dirkx	0:a259777c45a3	735	*go = try;
dirkx	0:a259777c45a3	736	}
dirkx	0:a259777c45a3	737
dirkx	0:a259777c45a3	738	return 1;
dirkx	0:a259777c45a3	739
dirkx	0:a259777c45a3	740	bad:
dirkx	0:a259777c45a3	741	IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
dirkx	0:a259777c45a3	742	return 0;
dirkx	0:a259777c45a3	743	}
dirkx	0:a259777c45a3	744
dirkx	0:a259777c45a3	745
dirkx	0:a259777c45a3	746	/*
dirkx	0:a259777c45a3	747	* ipcp_rejci - Reject some of our CIs.
dirkx	0:a259777c45a3	748	*/
dirkx	0:a259777c45a3	749	static int
dirkx	0:a259777c45a3	750	ipcp_rejci(fsm f, u_char p, int len)
dirkx	0:a259777c45a3	751	{
dirkx	0:a259777c45a3	752	ipcp_options *go = &ipcp_gotoptions[f->unit];
dirkx	0:a259777c45a3	753	u_char cimaxslotindex, ciflag, cilen;
dirkx	0:a259777c45a3	754	u_short cishort;
dirkx	0:a259777c45a3	755	u32_t cilong;
dirkx	0:a259777c45a3	756	ipcp_options try; /* options to request next time */
dirkx	0:a259777c45a3	757
dirkx	0:a259777c45a3	758	try = *go;
dirkx	0:a259777c45a3	759	/*
dirkx	0:a259777c45a3	760	* Any Rejected CIs must be in exactly the same order that we sent.
dirkx	0:a259777c45a3	761	* Check packet length and CI length at each step.
dirkx	0:a259777c45a3	762	* If we find any deviations, then this packet is bad.
dirkx	0:a259777c45a3	763	*/
dirkx	0:a259777c45a3	764	#define REJCIADDR(opt, neg, old, val1, val2) \
dirkx	0:a259777c45a3	765	if (go->neg && \
dirkx	0:a259777c45a3	766	len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
dirkx	0:a259777c45a3	767	p[1] == cilen && \
dirkx	0:a259777c45a3	768	p[0] == opt) { \
dirkx	0:a259777c45a3	769	u32_t l; \
dirkx	0:a259777c45a3	770	len -= cilen; \
dirkx	0:a259777c45a3	771	INCPTR(2, p); \
dirkx	0:a259777c45a3	772	GETLONG(l, p); \
dirkx	0:a259777c45a3	773	cilong = htonl(l); \
dirkx	0:a259777c45a3	774	/* Check rejected value. */ \
dirkx	0:a259777c45a3	775	if (cilong != val1) { \
dirkx	0:a259777c45a3	776	goto bad; \
dirkx	0:a259777c45a3	777	} \
dirkx	0:a259777c45a3	778	if (old) { \
dirkx	0:a259777c45a3	779	GETLONG(l, p); \
dirkx	0:a259777c45a3	780	cilong = htonl(l); \
dirkx	0:a259777c45a3	781	/* Check rejected value. */ \
dirkx	0:a259777c45a3	782	if (cilong != val2) { \
dirkx	0:a259777c45a3	783	goto bad; \
dirkx	0:a259777c45a3	784	} \
dirkx	0:a259777c45a3	785	} \
dirkx	0:a259777c45a3	786	try.neg = 0; \
dirkx	0:a259777c45a3	787	}
dirkx	0:a259777c45a3	788
dirkx	0:a259777c45a3	789	#define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
dirkx	0:a259777c45a3	790	if (go->neg && \
dirkx	0:a259777c45a3	791	p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
dirkx	0:a259777c45a3	792	len >= p[1] && \
dirkx	0:a259777c45a3	793	p[0] == opt) { \
dirkx	0:a259777c45a3	794	len -= p[1]; \
dirkx	0:a259777c45a3	795	INCPTR(2, p); \
dirkx	0:a259777c45a3	796	GETSHORT(cishort, p); \
dirkx	0:a259777c45a3	797	/* Check rejected value. */ \
dirkx	0:a259777c45a3	798	if (cishort != val) { \
dirkx	0:a259777c45a3	799	goto bad; \
dirkx	0:a259777c45a3	800	} \
dirkx	0:a259777c45a3	801	if (!old) { \
dirkx	0:a259777c45a3	802	GETCHAR(cimaxslotindex, p); \
dirkx	0:a259777c45a3	803	if (cimaxslotindex != maxslot) { \
dirkx	0:a259777c45a3	804	goto bad; \
dirkx	0:a259777c45a3	805	} \
dirkx	0:a259777c45a3	806	GETCHAR(ciflag, p); \
dirkx	0:a259777c45a3	807	if (ciflag != cflag) { \
dirkx	0:a259777c45a3	808	goto bad; \
dirkx	0:a259777c45a3	809	} \
dirkx	0:a259777c45a3	810	} \
dirkx	0:a259777c45a3	811	try.neg = 0; \
dirkx	0:a259777c45a3	812	}
dirkx	0:a259777c45a3	813
dirkx	0:a259777c45a3	814	#define REJCIDNS(opt, neg, dnsaddr) \
dirkx	0:a259777c45a3	815	if (go->neg && \
dirkx	0:a259777c45a3	816	((cilen = p[1]) == CILEN_ADDR) && \
dirkx	0:a259777c45a3	817	len >= cilen && \
dirkx	0:a259777c45a3	818	p[0] == opt) { \
dirkx	0:a259777c45a3	819	u32_t l; \
dirkx	0:a259777c45a3	820	len -= cilen; \
dirkx	0:a259777c45a3	821	INCPTR(2, p); \
dirkx	0:a259777c45a3	822	GETLONG(l, p); \
dirkx	0:a259777c45a3	823	cilong = htonl(l); \
dirkx	0:a259777c45a3	824	/* Check rejected value. */ \
dirkx	0:a259777c45a3	825	if (cilong != dnsaddr) { \
dirkx	0:a259777c45a3	826	goto bad; \
dirkx	0:a259777c45a3	827	} \
dirkx	0:a259777c45a3	828	try.neg = 0; \
dirkx	0:a259777c45a3	829	}
dirkx	0:a259777c45a3	830
dirkx	0:a259777c45a3	831	REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
dirkx	0:a259777c45a3	832	go->old_addrs, go->ouraddr, go->hisaddr);
dirkx	0:a259777c45a3	833
dirkx	0:a259777c45a3	834	REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
dirkx	0:a259777c45a3	835	go->maxslotindex, go->cflag);
dirkx	0:a259777c45a3	836
dirkx	0:a259777c45a3	837	REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
dirkx	0:a259777c45a3	838
dirkx	0:a259777c45a3	839	REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
dirkx	0:a259777c45a3	840
dirkx	0:a259777c45a3	841	/*
dirkx	0:a259777c45a3	842	* If there are any remaining CIs, then this packet is bad.
dirkx	0:a259777c45a3	843	*/
dirkx	0:a259777c45a3	844	if (len != 0) {
dirkx	0:a259777c45a3	845	goto bad;
dirkx	0:a259777c45a3	846	}
dirkx	0:a259777c45a3	847	/*
dirkx	0:a259777c45a3	848	* Now we can update state.
dirkx	0:a259777c45a3	849	*/
dirkx	0:a259777c45a3	850	if (f->state != LS_OPENED) {
dirkx	0:a259777c45a3	851	*go = try;
dirkx	0:a259777c45a3	852	}
dirkx	0:a259777c45a3	853	return 1;
dirkx	0:a259777c45a3	854
dirkx	0:a259777c45a3	855	bad:
dirkx	0:a259777c45a3	856	IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
dirkx	0:a259777c45a3	857	return 0;
dirkx	0:a259777c45a3	858	}
dirkx	0:a259777c45a3	859
dirkx	0:a259777c45a3	860
dirkx	0:a259777c45a3	861	/*
dirkx	0:a259777c45a3	862	* ipcp_reqci - Check the peer's requested CIs and send appropriate response.
dirkx	0:a259777c45a3	863	*
dirkx	0:a259777c45a3	864	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
dirkx	0:a259777c45a3	865	* appropriately. If reject_if_disagree is non-zero, doesn't return
dirkx	0:a259777c45a3	866	* CONFNAK; returns CONFREJ if it can't return CONFACK.
dirkx	0:a259777c45a3	867	*/
dirkx	0:a259777c45a3	868	static int
dirkx	0:a259777c45a3	869	ipcp_reqci(fsm f, u_char inp/* Requested CIs /,int len/* Length of requested CIs */,int reject_if_disagree)
dirkx	0:a259777c45a3	870	{
dirkx	0:a259777c45a3	871	ipcp_options *wo = &ipcp_wantoptions[f->unit];
dirkx	0:a259777c45a3	872	ipcp_options *ho = &ipcp_hisoptions[f->unit];
dirkx	0:a259777c45a3	873	ipcp_options *ao = &ipcp_allowoptions[f->unit];
dirkx	0:a259777c45a3	874	#ifdef OLD_CI_ADDRS
dirkx	0:a259777c45a3	875	ipcp_options *go = &ipcp_gotoptions[f->unit];
dirkx	0:a259777c45a3	876	#endif
dirkx	0:a259777c45a3	877	u_char cip, next; /* Pointer to current and next CIs */
dirkx	0:a259777c45a3	878	u_short cilen, citype; /* Parsed len, type */
dirkx	0:a259777c45a3	879	u_short cishort; /* Parsed short value */
dirkx	0:a259777c45a3	880	u32_t tl, ciaddr1; /* Parsed address values */
dirkx	0:a259777c45a3	881	#ifdef OLD_CI_ADDRS
dirkx	0:a259777c45a3	882	u32_t ciaddr2; /* Parsed address values */
dirkx	0:a259777c45a3	883	#endif
dirkx	0:a259777c45a3	884	int rc = CONFACK; /* Final packet return code */
dirkx	0:a259777c45a3	885	int orc; /* Individual option return code */
dirkx	0:a259777c45a3	886	u_char p; / Pointer to next char to parse */
dirkx	0:a259777c45a3	887	u_char ucp = inp; / Pointer to current output char */
dirkx	0:a259777c45a3	888	int l = len; / Length left */
dirkx	0:a259777c45a3	889	u_char maxslotindex, cflag;
dirkx	0:a259777c45a3	890	int d;
dirkx	0:a259777c45a3	891
dirkx	0:a259777c45a3	892	cis_received[f->unit] = 1;
dirkx	0:a259777c45a3	893
dirkx	0:a259777c45a3	894	/*
dirkx	0:a259777c45a3	895	* Reset all his options.
dirkx	0:a259777c45a3	896	*/
dirkx	0:a259777c45a3	897	BZERO(ho, sizeof(*ho));
dirkx	0:a259777c45a3	898
dirkx	0:a259777c45a3	899	/*
dirkx	0:a259777c45a3	900	* Process all his options.
dirkx	0:a259777c45a3	901	*/
dirkx	0:a259777c45a3	902	next = inp;
dirkx	0:a259777c45a3	903	while (l) {
dirkx	0:a259777c45a3	904	orc = CONFACK; /* Assume success */
dirkx	0:a259777c45a3	905	cip = p = next; /* Remember begining of CI */
dirkx	0:a259777c45a3	906	if (l < 2 \|\| /* Not enough data for CI header or */
dirkx	0:a259777c45a3	907	p[1] < 2 \|\| /* CI length too small or */
dirkx	0:a259777c45a3	908	p[1] > l) { /* CI length too big? */
dirkx	0:a259777c45a3	909	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
dirkx	0:a259777c45a3	910	orc = CONFREJ; /* Reject bad CI */
dirkx	0:a259777c45a3	911	cilen = (u_short)l;/* Reject till end of packet */
dirkx	0:a259777c45a3	912	l = 0; /* Don't loop again */
dirkx	0:a259777c45a3	913	goto endswitch;
dirkx	0:a259777c45a3	914	}
dirkx	0:a259777c45a3	915	GETCHAR(citype, p); /* Parse CI type */
dirkx	0:a259777c45a3	916	GETCHAR(cilen, p); /* Parse CI length */
dirkx	0:a259777c45a3	917	l -= cilen; /* Adjust remaining length */
dirkx	0:a259777c45a3	918	next += cilen; /* Step to next CI */
dirkx	0:a259777c45a3	919
dirkx	0:a259777c45a3	920	switch (citype) { /* Check CI type */
dirkx	0:a259777c45a3	921	#ifdef OLD_CI_ADDRS /* Need to save space... */
dirkx	0:a259777c45a3	922	case CI_ADDRS:
dirkx	0:a259777c45a3	923	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
dirkx	0:a259777c45a3	924	if (!ao->neg_addr \|\|
dirkx	0:a259777c45a3	925	cilen != CILEN_ADDRS) { /* Check CI length */
dirkx	0:a259777c45a3	926	orc = CONFREJ; /* Reject CI */
dirkx	0:a259777c45a3	927	break;
dirkx	0:a259777c45a3	928	}
dirkx	0:a259777c45a3	929
dirkx	0:a259777c45a3	930	/*
dirkx	0:a259777c45a3	931	* If he has no address, or if we both have his address but
dirkx	0:a259777c45a3	932	* disagree about it, then NAK it with our idea.
dirkx	0:a259777c45a3	933	* In particular, if we don't know his address, but he does,
dirkx	0:a259777c45a3	934	* then accept it.
dirkx	0:a259777c45a3	935	*/
dirkx	0:a259777c45a3	936	GETLONG(tl, p); /* Parse source address (his) */
dirkx	0:a259777c45a3	937	ciaddr1 = htonl(tl);
dirkx	0:a259777c45a3	938	IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
dirkx	0:a259777c45a3	939	if (ciaddr1 != wo->hisaddr
dirkx	0:a259777c45a3	940	&& (ciaddr1 == 0 \|\| !wo->accept_remote)) {
dirkx	0:a259777c45a3	941	orc = CONFNAK;
dirkx	0:a259777c45a3	942	if (!reject_if_disagree) {
dirkx	0:a259777c45a3	943	DECPTR(sizeof(u32_t), p);
dirkx	0:a259777c45a3	944	tl = ntohl(wo->hisaddr);
dirkx	0:a259777c45a3	945	PUTLONG(tl, p);
dirkx	0:a259777c45a3	946	}
dirkx	0:a259777c45a3	947	} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
dirkx	0:a259777c45a3	948	/*
dirkx	0:a259777c45a3	949	* If neither we nor he knows his address, reject the option.
dirkx	0:a259777c45a3	950	*/
dirkx	0:a259777c45a3	951	orc = CONFREJ;
dirkx	0:a259777c45a3	952	wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
dirkx	0:a259777c45a3	953	break;
dirkx	0:a259777c45a3	954	}
dirkx	0:a259777c45a3	955
dirkx	0:a259777c45a3	956	/*
dirkx	0:a259777c45a3	957	* If he doesn't know our address, or if we both have our address
dirkx	0:a259777c45a3	958	* but disagree about it, then NAK it with our idea.
dirkx	0:a259777c45a3	959	*/
dirkx	0:a259777c45a3	960	GETLONG(tl, p); /* Parse desination address (ours) */
dirkx	0:a259777c45a3	961	ciaddr2 = htonl(tl);
dirkx	0:a259777c45a3	962	IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
dirkx	0:a259777c45a3	963	if (ciaddr2 != wo->ouraddr) {
dirkx	0:a259777c45a3	964	if (ciaddr2 == 0 \|\| !wo->accept_local) {
dirkx	0:a259777c45a3	965	orc = CONFNAK;
dirkx	0:a259777c45a3	966	if (!reject_if_disagree) {
dirkx	0:a259777c45a3	967	DECPTR(sizeof(u32_t), p);
dirkx	0:a259777c45a3	968	tl = ntohl(wo->ouraddr);
dirkx	0:a259777c45a3	969	PUTLONG(tl, p);
dirkx	0:a259777c45a3	970	}
dirkx	0:a259777c45a3	971	} else {
dirkx	0:a259777c45a3	972	go->ouraddr = ciaddr2; /* accept peer's idea */
dirkx	0:a259777c45a3	973	}
dirkx	0:a259777c45a3	974	}
dirkx	0:a259777c45a3	975
dirkx	0:a259777c45a3	976	ho->neg_addr = 1;
dirkx	0:a259777c45a3	977	ho->old_addrs = 1;
dirkx	0:a259777c45a3	978	ho->hisaddr = ciaddr1;
dirkx	0:a259777c45a3	979	ho->ouraddr = ciaddr2;
dirkx	0:a259777c45a3	980	break;
dirkx	0:a259777c45a3	981	#endif
dirkx	0:a259777c45a3	982
dirkx	0:a259777c45a3	983	case CI_ADDR:
dirkx	0:a259777c45a3	984	if (!ao->neg_addr) {
dirkx	0:a259777c45a3	985	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
dirkx	0:a259777c45a3	986	orc = CONFREJ; /* Reject CI */
dirkx	0:a259777c45a3	987	break;
dirkx	0:a259777c45a3	988	} else if (cilen != CILEN_ADDR) { /* Check CI length */
dirkx	0:a259777c45a3	989	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
dirkx	0:a259777c45a3	990	orc = CONFREJ; /* Reject CI */
dirkx	0:a259777c45a3	991	break;
dirkx	0:a259777c45a3	992	}
dirkx	0:a259777c45a3	993
dirkx	0:a259777c45a3	994	/*
dirkx	0:a259777c45a3	995	* If he has no address, or if we both have his address but
dirkx	0:a259777c45a3	996	* disagree about it, then NAK it with our idea.
dirkx	0:a259777c45a3	997	* In particular, if we don't know his address, but he does,
dirkx	0:a259777c45a3	998	* then accept it.
dirkx	0:a259777c45a3	999	*/
dirkx	0:a259777c45a3	1000	GETLONG(tl, p); /* Parse source address (his) */
dirkx	0:a259777c45a3	1001	ciaddr1 = htonl(tl);
dirkx	0:a259777c45a3	1002	if (ciaddr1 != wo->hisaddr
dirkx	0:a259777c45a3	1003	&& (ciaddr1 == 0 \|\| !wo->accept_remote)) {
dirkx	0:a259777c45a3	1004	orc = CONFNAK;
dirkx	0:a259777c45a3	1005	if (!reject_if_disagree) {
dirkx	0:a259777c45a3	1006	DECPTR(sizeof(u32_t), p);
dirkx	0:a259777c45a3	1007	tl = ntohl(wo->hisaddr);
dirkx	0:a259777c45a3	1008	PUTLONG(tl, p);
dirkx	0:a259777c45a3	1009	}
dirkx	0:a259777c45a3	1010	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
dirkx	0:a259777c45a3	1011	} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
dirkx	0:a259777c45a3	1012	/*
dirkx	0:a259777c45a3	1013	* Don't ACK an address of 0.0.0.0 - reject it instead.
dirkx	0:a259777c45a3	1014	*/
dirkx	0:a259777c45a3	1015	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
dirkx	0:a259777c45a3	1016	orc = CONFREJ;
dirkx	0:a259777c45a3	1017	wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
dirkx	0:a259777c45a3	1018	break;
dirkx	0:a259777c45a3	1019	}
dirkx	0:a259777c45a3	1020
dirkx	0:a259777c45a3	1021	ho->neg_addr = 1;
dirkx	0:a259777c45a3	1022	ho->hisaddr = ciaddr1;
dirkx	0:a259777c45a3	1023	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
dirkx	0:a259777c45a3	1024	break;
dirkx	0:a259777c45a3	1025
dirkx	0:a259777c45a3	1026	case CI_MS_DNS1:
dirkx	0:a259777c45a3	1027	case CI_MS_DNS2:
dirkx	0:a259777c45a3	1028	/* Microsoft primary or secondary DNS request */
dirkx	0:a259777c45a3	1029	d = citype == CI_MS_DNS2;
dirkx	0:a259777c45a3	1030
dirkx	0:a259777c45a3	1031	/* If we do not have a DNS address then we cannot send it */
dirkx	0:a259777c45a3	1032	if (ao->dnsaddr[d] == 0 \|\|
dirkx	0:a259777c45a3	1033	cilen != CILEN_ADDR) { /* Check CI length */
dirkx	0:a259777c45a3	1034	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
dirkx	0:a259777c45a3	1035	orc = CONFREJ; /* Reject CI */
dirkx	0:a259777c45a3	1036	break;
dirkx	0:a259777c45a3	1037	}
dirkx	0:a259777c45a3	1038	GETLONG(tl, p);
dirkx	0:a259777c45a3	1039	if (htonl(tl) != ao->dnsaddr[d]) {
dirkx	0:a259777c45a3	1040	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
dirkx	0:a259777c45a3	1041	d+1, inet_ntoa(tl)));
dirkx	0:a259777c45a3	1042	DECPTR(sizeof(u32_t), p);
dirkx	0:a259777c45a3	1043	tl = ntohl(ao->dnsaddr[d]);
dirkx	0:a259777c45a3	1044	PUTLONG(tl, p);
dirkx	0:a259777c45a3	1045	orc = CONFNAK;
dirkx	0:a259777c45a3	1046	}
dirkx	0:a259777c45a3	1047	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
dirkx	0:a259777c45a3	1048	break;
dirkx	0:a259777c45a3	1049
dirkx	0:a259777c45a3	1050	case CI_MS_WINS1:
dirkx	0:a259777c45a3	1051	case CI_MS_WINS2:
dirkx	0:a259777c45a3	1052	/* Microsoft primary or secondary WINS request */
dirkx	0:a259777c45a3	1053	d = citype == CI_MS_WINS2;
dirkx	0:a259777c45a3	1054	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
dirkx	0:a259777c45a3	1055
dirkx	0:a259777c45a3	1056	/* If we do not have a DNS address then we cannot send it */
dirkx	0:a259777c45a3	1057	if (ao->winsaddr[d] == 0 \|\|
dirkx	0:a259777c45a3	1058	cilen != CILEN_ADDR) { /* Check CI length */
dirkx	0:a259777c45a3	1059	orc = CONFREJ; /* Reject CI */
dirkx	0:a259777c45a3	1060	break;
dirkx	0:a259777c45a3	1061	}
dirkx	0:a259777c45a3	1062	GETLONG(tl, p);
dirkx	0:a259777c45a3	1063	if (htonl(tl) != ao->winsaddr[d]) {
dirkx	0:a259777c45a3	1064	DECPTR(sizeof(u32_t), p);
dirkx	0:a259777c45a3	1065	tl = ntohl(ao->winsaddr[d]);
dirkx	0:a259777c45a3	1066	PUTLONG(tl, p);
dirkx	0:a259777c45a3	1067	orc = CONFNAK;
dirkx	0:a259777c45a3	1068	}
dirkx	0:a259777c45a3	1069	break;
dirkx	0:a259777c45a3	1070
dirkx	0:a259777c45a3	1071	case CI_COMPRESSTYPE:
dirkx	0:a259777c45a3	1072	if (!ao->neg_vj) {
dirkx	0:a259777c45a3	1073	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
dirkx	0:a259777c45a3	1074	orc = CONFREJ;
dirkx	0:a259777c45a3	1075	break;
dirkx	0:a259777c45a3	1076	} else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
dirkx	0:a259777c45a3	1077	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
dirkx	0:a259777c45a3	1078	orc = CONFREJ;
dirkx	0:a259777c45a3	1079	break;
dirkx	0:a259777c45a3	1080	}
dirkx	0:a259777c45a3	1081	GETSHORT(cishort, p);
dirkx	0:a259777c45a3	1082
dirkx	0:a259777c45a3	1083	if (!(cishort == IPCP_VJ_COMP \|\|
dirkx	0:a259777c45a3	1084	(cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
dirkx	0:a259777c45a3	1085	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
dirkx	0:a259777c45a3	1086	orc = CONFREJ;
dirkx	0:a259777c45a3	1087	break;
dirkx	0:a259777c45a3	1088	}
dirkx	0:a259777c45a3	1089
dirkx	0:a259777c45a3	1090	ho->neg_vj = 1;
dirkx	0:a259777c45a3	1091	ho->vj_protocol = cishort;
dirkx	0:a259777c45a3	1092	if (cilen == CILEN_VJ) {
dirkx	0:a259777c45a3	1093	GETCHAR(maxslotindex, p);
dirkx	0:a259777c45a3	1094	if (maxslotindex > ao->maxslotindex) {
dirkx	0:a259777c45a3	1095	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
dirkx	0:a259777c45a3	1096	orc = CONFNAK;
dirkx	0:a259777c45a3	1097	if (!reject_if_disagree) {
dirkx	0:a259777c45a3	1098	DECPTR(1, p);
dirkx	0:a259777c45a3	1099	PUTCHAR(ao->maxslotindex, p);
dirkx	0:a259777c45a3	1100	}
dirkx	0:a259777c45a3	1101	}
dirkx	0:a259777c45a3	1102	GETCHAR(cflag, p);
dirkx	0:a259777c45a3	1103	if (cflag && !ao->cflag) {
dirkx	0:a259777c45a3	1104	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
dirkx	0:a259777c45a3	1105	orc = CONFNAK;
dirkx	0:a259777c45a3	1106	if (!reject_if_disagree) {
dirkx	0:a259777c45a3	1107	DECPTR(1, p);
dirkx	0:a259777c45a3	1108	PUTCHAR(wo->cflag, p);
dirkx	0:a259777c45a3	1109	}
dirkx	0:a259777c45a3	1110	}
dirkx	0:a259777c45a3	1111	ho->maxslotindex = maxslotindex;
dirkx	0:a259777c45a3	1112	ho->cflag = cflag;
dirkx	0:a259777c45a3	1113	} else {
dirkx	0:a259777c45a3	1114	ho->old_vj = 1;
dirkx	0:a259777c45a3	1115	ho->maxslotindex = MAX_SLOTS - 1;
dirkx	0:a259777c45a3	1116	ho->cflag = 1;
dirkx	0:a259777c45a3	1117	}
dirkx	0:a259777c45a3	1118	IPCPDEBUG(LOG_INFO, (
dirkx	0:a259777c45a3	1119	"ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
dirkx	0:a259777c45a3	1120	ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
dirkx	0:a259777c45a3	1121	break;
dirkx	0:a259777c45a3	1122
dirkx	0:a259777c45a3	1123	default:
dirkx	0:a259777c45a3	1124	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
dirkx	0:a259777c45a3	1125	orc = CONFREJ;
dirkx	0:a259777c45a3	1126	break;
dirkx	0:a259777c45a3	1127	}
dirkx	0:a259777c45a3	1128
dirkx	0:a259777c45a3	1129	endswitch:
dirkx	0:a259777c45a3	1130	if (orc == CONFACK && /* Good CI */
dirkx	0:a259777c45a3	1131	rc != CONFACK) { /* but prior CI wasnt? */
dirkx	0:a259777c45a3	1132	continue; /* Don't send this one */
dirkx	0:a259777c45a3	1133	}
dirkx	0:a259777c45a3	1134
dirkx	0:a259777c45a3	1135	if (orc == CONFNAK) { /* Nak this CI? */
dirkx	0:a259777c45a3	1136	if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
dirkx	0:a259777c45a3	1137	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
dirkx	0:a259777c45a3	1138	orc = CONFREJ; /* Get tough if so */
dirkx	0:a259777c45a3	1139	} else {
dirkx	0:a259777c45a3	1140	if (rc == CONFREJ) { /* Rejecting prior CI? */
dirkx	0:a259777c45a3	1141	continue; /* Don't send this one */
dirkx	0:a259777c45a3	1142	}
dirkx	0:a259777c45a3	1143	if (rc == CONFACK) { /* Ack'd all prior CIs? */
dirkx	0:a259777c45a3	1144	rc = CONFNAK; /* Not anymore... */
dirkx	0:a259777c45a3	1145	ucp = inp; /* Backup */
dirkx	0:a259777c45a3	1146	}
dirkx	0:a259777c45a3	1147	}
dirkx	0:a259777c45a3	1148	}
dirkx	0:a259777c45a3	1149
dirkx	0:a259777c45a3	1150	if (orc == CONFREJ && /* Reject this CI */
dirkx	0:a259777c45a3	1151	rc != CONFREJ) { /* but no prior ones? */
dirkx	0:a259777c45a3	1152	rc = CONFREJ;
dirkx	0:a259777c45a3	1153	ucp = inp; /* Backup */
dirkx	0:a259777c45a3	1154	}
dirkx	0:a259777c45a3	1155
dirkx	0:a259777c45a3	1156	/* Need to move CI? */
dirkx	0:a259777c45a3	1157	if (ucp != cip) {
dirkx	0:a259777c45a3	1158	BCOPY(cip, ucp, cilen); /* Move it */
dirkx	0:a259777c45a3	1159	}
dirkx	0:a259777c45a3	1160
dirkx	0:a259777c45a3	1161	/* Update output pointer */
dirkx	0:a259777c45a3	1162	INCPTR(cilen, ucp);
dirkx	0:a259777c45a3	1163	}
dirkx	0:a259777c45a3	1164
dirkx	0:a259777c45a3	1165	/*
dirkx	0:a259777c45a3	1166	* If we aren't rejecting this packet, and we want to negotiate
dirkx	0:a259777c45a3	1167	* their address, and they didn't send their address, then we
dirkx	0:a259777c45a3	1168	* send a NAK with a CI_ADDR option appended. We assume the
dirkx	0:a259777c45a3	1169	* input buffer is long enough that we can append the extra
dirkx	0:a259777c45a3	1170	* option safely.
dirkx	0:a259777c45a3	1171	*/
dirkx	0:a259777c45a3	1172	if (rc != CONFREJ && !ho->neg_addr &&
dirkx	0:a259777c45a3	1173	wo->req_addr && !reject_if_disagree) {
dirkx	0:a259777c45a3	1174	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
dirkx	0:a259777c45a3	1175	if (rc == CONFACK) {
dirkx	0:a259777c45a3	1176	rc = CONFNAK;
dirkx	0:a259777c45a3	1177	ucp = inp; /* reset pointer */
dirkx	0:a259777c45a3	1178	wo->req_addr = 0; /* don't ask again */
dirkx	0:a259777c45a3	1179	}
dirkx	0:a259777c45a3	1180	PUTCHAR(CI_ADDR, ucp);
dirkx	0:a259777c45a3	1181	PUTCHAR(CILEN_ADDR, ucp);
dirkx	0:a259777c45a3	1182	tl = ntohl(wo->hisaddr);
dirkx	0:a259777c45a3	1183	PUTLONG(tl, ucp);
dirkx	0:a259777c45a3	1184	}
dirkx	0:a259777c45a3	1185
dirkx	0:a259777c45a3	1186	len = (int)(ucp - inp); / Compute output length */
dirkx	0:a259777c45a3	1187	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
dirkx	0:a259777c45a3	1188	return (rc); /* Return final code */
dirkx	0:a259777c45a3	1189	}
dirkx	0:a259777c45a3	1190
dirkx	0:a259777c45a3	1191
dirkx	0:a259777c45a3	1192	#if 0
dirkx	0:a259777c45a3	1193	/*
dirkx	0:a259777c45a3	1194	* ip_check_options - check that any IP-related options are OK,
dirkx	0:a259777c45a3	1195	* and assign appropriate defaults.
dirkx	0:a259777c45a3	1196	*/
dirkx	0:a259777c45a3	1197	static void
dirkx	0:a259777c45a3	1198	ip_check_options(u_long localAddr)
dirkx	0:a259777c45a3	1199	{
dirkx	0:a259777c45a3	1200	ipcp_options *wo = &ipcp_wantoptions[0];
dirkx	0:a259777c45a3	1201
dirkx	0:a259777c45a3	1202	/*
dirkx	0:a259777c45a3	1203	* Load our default IP address but allow the remote host to give us
dirkx	0:a259777c45a3	1204	* a new address.
dirkx	0:a259777c45a3	1205	*/
dirkx	0:a259777c45a3	1206	if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
dirkx	0:a259777c45a3	1207	wo->accept_local = 1; /* don't insist on this default value */
dirkx	0:a259777c45a3	1208	wo->ouraddr = htonl(localAddr);
dirkx	0:a259777c45a3	1209	}
dirkx	0:a259777c45a3	1210	}
dirkx	0:a259777c45a3	1211	#endif
dirkx	0:a259777c45a3	1212
dirkx	0:a259777c45a3	1213
dirkx	0:a259777c45a3	1214	/*
dirkx	0:a259777c45a3	1215	* ipcp_up - IPCP has come UP.
dirkx	0:a259777c45a3	1216	*
dirkx	0:a259777c45a3	1217	* Configure the IP network interface appropriately and bring it up.
dirkx	0:a259777c45a3	1218	*/
dirkx	0:a259777c45a3	1219	static void
dirkx	0:a259777c45a3	1220	ipcp_up(fsm *f)
dirkx	0:a259777c45a3	1221	{
dirkx	0:a259777c45a3	1222	u32_t mask;
dirkx	0:a259777c45a3	1223	ipcp_options *ho = &ipcp_hisoptions[f->unit];
dirkx	0:a259777c45a3	1224	ipcp_options *go = &ipcp_gotoptions[f->unit];
dirkx	0:a259777c45a3	1225	ipcp_options *wo = &ipcp_wantoptions[f->unit];
dirkx	0:a259777c45a3	1226
dirkx	0:a259777c45a3	1227	np_up(f->unit, PPP_IP);
dirkx	0:a259777c45a3	1228	IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
dirkx	0:a259777c45a3	1229
dirkx	0:a259777c45a3	1230	/*
dirkx	0:a259777c45a3	1231	* We must have a non-zero IP address for both ends of the link.
dirkx	0:a259777c45a3	1232	*/
dirkx	0:a259777c45a3	1233	if (!ho->neg_addr) {
dirkx	0:a259777c45a3	1234	ho->hisaddr = wo->hisaddr;
dirkx	0:a259777c45a3	1235	}
dirkx	0:a259777c45a3	1236	#ifdef __PPP_STRICT_IMPL__ //Kludge for bad 3g providers PPP impl
dirkx	0:a259777c45a3	1237	if (ho->hisaddr == 0) {
dirkx	0:a259777c45a3	1238	IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
dirkx	0:a259777c45a3	1239	ipcp_close(f->unit, "Could not determine remote IP address");
dirkx	0:a259777c45a3	1240	return;
dirkx	0:a259777c45a3	1241	}
dirkx	0:a259777c45a3	1242	#endif
dirkx	0:a259777c45a3	1243	if (go->ouraddr == 0) {
dirkx	0:a259777c45a3	1244	IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
dirkx	0:a259777c45a3	1245	ipcp_close(f->unit, "Could not determine local IP address");
dirkx	0:a259777c45a3	1246	return;
dirkx	0:a259777c45a3	1247	}
dirkx	0:a259777c45a3	1248
dirkx	0:a259777c45a3	1249	if (ppp_settings.usepeerdns && (go->dnsaddr[0] \|\| go->dnsaddr[1])) {
dirkx	0:a259777c45a3	1250	/pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);/
dirkx	0:a259777c45a3	1251	}
dirkx	0:a259777c45a3	1252
dirkx	0:a259777c45a3	1253	/*
dirkx	0:a259777c45a3	1254	* Check that the peer is allowed to use the IP address it wants.
dirkx	0:a259777c45a3	1255	*/
dirkx	0:a259777c45a3	1256	if (!auth_ip_addr(f->unit, ho->hisaddr)) {
dirkx	0:a259777c45a3	1257	IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
dirkx	0:a259777c45a3	1258	inet_ntoa(ho->hisaddr)));
dirkx	0:a259777c45a3	1259	ipcp_close(f->unit, "Unauthorized remote IP address");
dirkx	0:a259777c45a3	1260	return;
dirkx	0:a259777c45a3	1261	}
dirkx	0:a259777c45a3	1262
dirkx	0:a259777c45a3	1263	/* set tcp compression */
dirkx	0:a259777c45a3	1264	sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
dirkx	0:a259777c45a3	1265
dirkx	0:a259777c45a3	1266	/*
dirkx	0:a259777c45a3	1267	* Set IP addresses and (if specified) netmask.
dirkx	0:a259777c45a3	1268	*/
dirkx	0:a259777c45a3	1269	mask = GetMask(go->ouraddr);
dirkx	0:a259777c45a3	1270
dirkx	0:a259777c45a3	1271	if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
dirkx	0:a259777c45a3	1272	IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
dirkx	0:a259777c45a3	1273	ipcp_close(f->unit, "Interface configuration failed");
dirkx	0:a259777c45a3	1274	return;
dirkx	0:a259777c45a3	1275	}
dirkx	0:a259777c45a3	1276
dirkx	0:a259777c45a3	1277	/* bring the interface up for IP */
dirkx	0:a259777c45a3	1278	if (!sifup(f->unit)) {
dirkx	0:a259777c45a3	1279	IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
dirkx	0:a259777c45a3	1280	ipcp_close(f->unit, "Interface configuration failed");
dirkx	0:a259777c45a3	1281	return;
dirkx	0:a259777c45a3	1282	}
dirkx	0:a259777c45a3	1283
dirkx	0:a259777c45a3	1284	sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
dirkx	0:a259777c45a3	1285
dirkx	0:a259777c45a3	1286	/* assign a default route through the interface if required */
dirkx	0:a259777c45a3	1287	if (ipcp_wantoptions[f->unit].default_route) {
dirkx	0:a259777c45a3	1288	if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
dirkx	0:a259777c45a3	1289	default_route_set[f->unit] = 1;
dirkx	0:a259777c45a3	1290	}
dirkx	0:a259777c45a3	1291	}
dirkx	0:a259777c45a3	1292
dirkx	0:a259777c45a3	1293	IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
dirkx	0:a259777c45a3	1294	IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
dirkx	0:a259777c45a3	1295	if (go->dnsaddr[0]) {
dirkx	0:a259777c45a3	1296	IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
dirkx	0:a259777c45a3	1297	}
dirkx	0:a259777c45a3	1298	if (go->dnsaddr[1]) {
dirkx	0:a259777c45a3	1299	IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
dirkx	0:a259777c45a3	1300	}
dirkx	0:a259777c45a3	1301	}
dirkx	0:a259777c45a3	1302
dirkx	0:a259777c45a3	1303
dirkx	0:a259777c45a3	1304	/*
dirkx	0:a259777c45a3	1305	* ipcp_down - IPCP has gone DOWN.
dirkx	0:a259777c45a3	1306	*
dirkx	0:a259777c45a3	1307	* Take the IP network interface down, clear its addresses
dirkx	0:a259777c45a3	1308	* and delete routes through it.
dirkx	0:a259777c45a3	1309	*/
dirkx	0:a259777c45a3	1310	static void
dirkx	0:a259777c45a3	1311	ipcp_down(fsm *f)
dirkx	0:a259777c45a3	1312	{
dirkx	0:a259777c45a3	1313	IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
dirkx	0:a259777c45a3	1314	np_down(f->unit, PPP_IP);
dirkx	0:a259777c45a3	1315	sifvjcomp(f->unit, 0, 0, 0);
dirkx	0:a259777c45a3	1316
dirkx	0:a259777c45a3	1317	sifdown(f->unit);
dirkx	0:a259777c45a3	1318	ipcp_clear_addrs(f->unit);
dirkx	0:a259777c45a3	1319	}
dirkx	0:a259777c45a3	1320
dirkx	0:a259777c45a3	1321
dirkx	0:a259777c45a3	1322	/*
dirkx	0:a259777c45a3	1323	* ipcp_clear_addrs() - clear the interface addresses, routes, etc.
dirkx	0:a259777c45a3	1324	*/
dirkx	0:a259777c45a3	1325	static void
dirkx	0:a259777c45a3	1326	ipcp_clear_addrs(int unit)
dirkx	0:a259777c45a3	1327	{
dirkx	0:a259777c45a3	1328	u32_t ouraddr, hisaddr;
dirkx	0:a259777c45a3	1329
dirkx	0:a259777c45a3	1330	ouraddr = ipcp_gotoptions[unit].ouraddr;
dirkx	0:a259777c45a3	1331	hisaddr = ipcp_hisoptions[unit].hisaddr;
dirkx	0:a259777c45a3	1332	if (default_route_set[unit]) {
dirkx	0:a259777c45a3	1333	cifdefaultroute(unit, ouraddr, hisaddr);
dirkx	0:a259777c45a3	1334	default_route_set[unit] = 0;
dirkx	0:a259777c45a3	1335	}
dirkx	0:a259777c45a3	1336	cifaddr(unit, ouraddr, hisaddr);
dirkx	0:a259777c45a3	1337	}
dirkx	0:a259777c45a3	1338
dirkx	0:a259777c45a3	1339
dirkx	0:a259777c45a3	1340	/*
dirkx	0:a259777c45a3	1341	* ipcp_finished - possibly shut down the lower layers.
dirkx	0:a259777c45a3	1342	*/
dirkx	0:a259777c45a3	1343	static void
dirkx	0:a259777c45a3	1344	ipcp_finished(fsm *f)
dirkx	0:a259777c45a3	1345	{
dirkx	0:a259777c45a3	1346	np_finished(f->unit, PPP_IP);
dirkx	0:a259777c45a3	1347	}
dirkx	0:a259777c45a3	1348
dirkx	0:a259777c45a3	1349	#if PPP_ADDITIONAL_CALLBACKS
dirkx	0:a259777c45a3	1350	static int
dirkx	0:a259777c45a3	1351	ipcp_printpkt(u_char p, int plen, void (printer) (void , char , ...), void *arg)
dirkx	0:a259777c45a3	1352	{
dirkx	0:a259777c45a3	1353	LWIP_UNUSED_ARG(p);
dirkx	0:a259777c45a3	1354	LWIP_UNUSED_ARG(plen);
dirkx	0:a259777c45a3	1355	LWIP_UNUSED_ARG(printer);
dirkx	0:a259777c45a3	1356	LWIP_UNUSED_ARG(arg);
dirkx	0:a259777c45a3	1357	return 0;
dirkx	0:a259777c45a3	1358	}
dirkx	0:a259777c45a3	1359
dirkx	0:a259777c45a3	1360	/*
dirkx	0:a259777c45a3	1361	* ip_active_pkt - see if this IP packet is worth bringing the link up for.
dirkx	0:a259777c45a3	1362	* We don't bring the link up for IP fragments or for TCP FIN packets
dirkx	0:a259777c45a3	1363	* with no data.
dirkx	0:a259777c45a3	1364	*/
dirkx	0:a259777c45a3	1365	#define IP_HDRLEN 20 /* bytes */
dirkx	0:a259777c45a3	1366	#define IP_OFFMASK 0x1fff
dirkx	0:a259777c45a3	1367	#define IPPROTO_TCP 6
dirkx	0:a259777c45a3	1368	#define TCP_HDRLEN 20
dirkx	0:a259777c45a3	1369	#define TH_FIN 0x01
dirkx	0:a259777c45a3	1370
dirkx	0:a259777c45a3	1371	/*
dirkx	0:a259777c45a3	1372	* We use these macros because the IP header may be at an odd address,
dirkx	0:a259777c45a3	1373	* and some compilers might use word loads to get th_off or ip_hl.
dirkx	0:a259777c45a3	1374	*/
dirkx	0:a259777c45a3	1375
dirkx	0:a259777c45a3	1376	#define net_short(x) (((x)[0] << 8) + (x)[1])
dirkx	0:a259777c45a3	1377	#define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
dirkx	0:a259777c45a3	1378	#define get_ipoff(x) net_short((unsigned char *)(x) + 6)
dirkx	0:a259777c45a3	1379	#define get_ipproto(x) (((unsigned char *)(x))[9])
dirkx	0:a259777c45a3	1380	#define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
dirkx	0:a259777c45a3	1381	#define get_tcpflags(x) (((unsigned char *)(x))[13])
dirkx	0:a259777c45a3	1382
dirkx	0:a259777c45a3	1383	static int
dirkx	0:a259777c45a3	1384	ip_active_pkt(u_char *pkt, int len)
dirkx	0:a259777c45a3	1385	{
dirkx	0:a259777c45a3	1386	u_char *tcp;
dirkx	0:a259777c45a3	1387	int hlen;
dirkx	0:a259777c45a3	1388
dirkx	0:a259777c45a3	1389	len -= PPP_HDRLEN;
dirkx	0:a259777c45a3	1390	pkt += PPP_HDRLEN;
dirkx	0:a259777c45a3	1391	if (len < IP_HDRLEN) {
dirkx	0:a259777c45a3	1392	return 0;
dirkx	0:a259777c45a3	1393	}
dirkx	0:a259777c45a3	1394	if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
dirkx	0:a259777c45a3	1395	return 0;
dirkx	0:a259777c45a3	1396	}
dirkx	0:a259777c45a3	1397	if (get_ipproto(pkt) != IPPROTO_TCP) {
dirkx	0:a259777c45a3	1398	return 1;
dirkx	0:a259777c45a3	1399	}
dirkx	0:a259777c45a3	1400	hlen = get_iphl(pkt) * 4;
dirkx	0:a259777c45a3	1401	if (len < hlen + TCP_HDRLEN) {
dirkx	0:a259777c45a3	1402	return 0;
dirkx	0:a259777c45a3	1403	}
dirkx	0:a259777c45a3	1404	tcp = pkt + hlen;
dirkx	0:a259777c45a3	1405	if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
dirkx	0:a259777c45a3	1406	return 0;
dirkx	0:a259777c45a3	1407	}
dirkx	0:a259777c45a3	1408	return 1;
dirkx	0:a259777c45a3	1409	}
dirkx	0:a259777c45a3	1410	#endif /* PPP_ADDITIONAL_CALLBACKS */
dirkx	0:a259777c45a3	1411
dirkx	0:a259777c45a3	1412	#endif /* PPP_SUPPORT */

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	14 Aug 2010
Imports:	49
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	2
Followers:	1

lwip/netif/ppp/ipcp.c@0:a259777c45a3, 2010-08-14 (annotated)

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