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NetTribute library with debug turned on in FShandler Donatien Garner -> Segundo Equipo -> this version

lwip/netif/ppp/ipcp.c@0:281d6ff68967, 2010-11-19 (annotated)

Committer:: hexley
Date:: Fri Nov 19 01:54:45 2010 +0000
Revision:: 0:281d6ff68967

Who changed what in which revision?

User	Revision	Line number	New contents of line
hexley	0:281d6ff68967	1	/** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
hexley	0:281d6ff68967	2	dial-on-demand has been stripped. */
hexley	0:281d6ff68967	3	/*****************************************************************************
hexley	0:281d6ff68967	4	* ipcp.c - Network PPP IP Control Protocol program file.
hexley	0:281d6ff68967	5	*
hexley	0:281d6ff68967	6	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
hexley	0:281d6ff68967	7	* portions Copyright (c) 1997 by Global Election Systems Inc.
hexley	0:281d6ff68967	8	*
hexley	0:281d6ff68967	9	* The authors hereby grant permission to use, copy, modify, distribute,
hexley	0:281d6ff68967	10	* and license this software and its documentation for any purpose, provided
hexley	0:281d6ff68967	11	* that existing copyright notices are retained in all copies and that this
hexley	0:281d6ff68967	12	* notice and the following disclaimer are included verbatim in any
hexley	0:281d6ff68967	13	* distributions. No written agreement, license, or royalty fee is required
hexley	0:281d6ff68967	14	* for any of the authorized uses.
hexley	0:281d6ff68967	15	*
hexley	0:281d6ff68967	16	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
hexley	0:281d6ff68967	17	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
hexley	0:281d6ff68967	18	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
hexley	0:281d6ff68967	19	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
hexley	0:281d6ff68967	20	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
hexley	0:281d6ff68967	21	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
hexley	0:281d6ff68967	22	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
hexley	0:281d6ff68967	23	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
hexley	0:281d6ff68967	24	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
hexley	0:281d6ff68967	25	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
hexley	0:281d6ff68967	26	*
hexley	0:281d6ff68967	27	******************************************************************************
hexley	0:281d6ff68967	28	* REVISION HISTORY
hexley	0:281d6ff68967	29	*
hexley	0:281d6ff68967	30	* 03-01-01 Marc Boucher <marc@mbsi.ca>
hexley	0:281d6ff68967	31	* Ported to lwIP.
hexley	0:281d6ff68967	32	* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
hexley	0:281d6ff68967	33	* Original.
hexley	0:281d6ff68967	34	*****************************************************************************/
hexley	0:281d6ff68967	35	/*
hexley	0:281d6ff68967	36	* ipcp.c - PPP IP Control Protocol.
hexley	0:281d6ff68967	37	*
hexley	0:281d6ff68967	38	* Copyright (c) 1989 Carnegie Mellon University.
hexley	0:281d6ff68967	39	* All rights reserved.
hexley	0:281d6ff68967	40	*
hexley	0:281d6ff68967	41	* Redistribution and use in source and binary forms are permitted
hexley	0:281d6ff68967	42	* provided that the above copyright notice and this paragraph are
hexley	0:281d6ff68967	43	* duplicated in all such forms and that any documentation,
hexley	0:281d6ff68967	44	* advertising materials, and other materials related to such
hexley	0:281d6ff68967	45	* distribution and use acknowledge that the software was developed
hexley	0:281d6ff68967	46	* by Carnegie Mellon University. The name of the
hexley	0:281d6ff68967	47	* University may not be used to endorse or promote products derived
hexley	0:281d6ff68967	48	* from this software without specific prior written permission.
hexley	0:281d6ff68967	49	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
hexley	0:281d6ff68967	50	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
hexley	0:281d6ff68967	51	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
hexley	0:281d6ff68967	52	*/
hexley	0:281d6ff68967	53
hexley	0:281d6ff68967	54	#include "lwip/opt.h"
hexley	0:281d6ff68967	55
hexley	0:281d6ff68967	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
hexley	0:281d6ff68967	57
hexley	0:281d6ff68967	58	#include "ppp.h"
hexley	0:281d6ff68967	59	#include "pppdebug.h"
hexley	0:281d6ff68967	60
hexley	0:281d6ff68967	61	#include "auth.h"
hexley	0:281d6ff68967	62	#include "fsm.h"
hexley	0:281d6ff68967	63	#include "vj.h"
hexley	0:281d6ff68967	64	#include "ipcp.h"
hexley	0:281d6ff68967	65
hexley	0:281d6ff68967	66	#include "lwip/inet.h"
hexley	0:281d6ff68967	67
hexley	0:281d6ff68967	68	#include <string.h>
hexley	0:281d6ff68967	69
hexley	0:281d6ff68967	70	/* #define OLD_CI_ADDRS 1 / / Support deprecated address negotiation. */
hexley	0:281d6ff68967	71
hexley	0:281d6ff68967	72	/* global vars */
hexley	0:281d6ff68967	73	ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
hexley	0:281d6ff68967	74	ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
hexley	0:281d6ff68967	75	ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
hexley	0:281d6ff68967	76	ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
hexley	0:281d6ff68967	77
hexley	0:281d6ff68967	78	/* local vars */
hexley	0:281d6ff68967	79	static int default_route_set[NUM_PPP]; /* Have set up a default route */
hexley	0:281d6ff68967	80	static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
hexley	0:281d6ff68967	81
hexley	0:281d6ff68967	82
hexley	0:281d6ff68967	83	/*
hexley	0:281d6ff68967	84	* Callbacks for fsm code. (CI = Configuration Information)
hexley	0:281d6ff68967	85	*/
hexley	0:281d6ff68967	86	static void ipcp_resetci (fsm ); / Reset our CI */
hexley	0:281d6ff68967	87	static int ipcp_cilen (fsm ); / Return length of our CI */
hexley	0:281d6ff68967	88	static void ipcp_addci (fsm , u_char , int ); / Add our CI */
hexley	0:281d6ff68967	89	static int ipcp_ackci (fsm , u_char , int); /* Peer ack'd our CI */
hexley	0:281d6ff68967	90	static int ipcp_nakci (fsm , u_char , int); /* Peer nak'd our CI */
hexley	0:281d6ff68967	91	static int ipcp_rejci (fsm , u_char , int); /* Peer rej'd our CI */
hexley	0:281d6ff68967	92	static int ipcp_reqci (fsm , u_char , int , int); / Rcv CI */
hexley	0:281d6ff68967	93	static void ipcp_up (fsm ); / We're UP */
hexley	0:281d6ff68967	94	static void ipcp_down (fsm ); / We're DOWN */
hexley	0:281d6ff68967	95	#if PPP_ADDITIONAL_CALLBACKS
hexley	0:281d6ff68967	96	static void ipcp_script (fsm , char ); /* Run an up/down script */
hexley	0:281d6ff68967	97	#endif
hexley	0:281d6ff68967	98	static void ipcp_finished (fsm ); / Don't need lower layer */
hexley	0:281d6ff68967	99
hexley	0:281d6ff68967	100
hexley	0:281d6ff68967	101	fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
hexley	0:281d6ff68967	102
hexley	0:281d6ff68967	103
hexley	0:281d6ff68967	104	static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
hexley	0:281d6ff68967	105	ipcp_resetci, /* Reset our Configuration Information */
hexley	0:281d6ff68967	106	ipcp_cilen, /* Length of our Configuration Information */
hexley	0:281d6ff68967	107	ipcp_addci, /* Add our Configuration Information */
hexley	0:281d6ff68967	108	ipcp_ackci, /* ACK our Configuration Information */
hexley	0:281d6ff68967	109	ipcp_nakci, /* NAK our Configuration Information */
hexley	0:281d6ff68967	110	ipcp_rejci, /* Reject our Configuration Information */
hexley	0:281d6ff68967	111	ipcp_reqci, /* Request peer's Configuration Information */
hexley	0:281d6ff68967	112	ipcp_up, /* Called when fsm reaches LS_OPENED state */
hexley	0:281d6ff68967	113	ipcp_down, /* Called when fsm leaves LS_OPENED state */
hexley	0:281d6ff68967	114	NULL, /* Called when we want the lower layer up */
hexley	0:281d6ff68967	115	ipcp_finished, /* Called when we want the lower layer down */
hexley	0:281d6ff68967	116	NULL, /* Called when Protocol-Reject received */
hexley	0:281d6ff68967	117	NULL, /* Retransmission is necessary */
hexley	0:281d6ff68967	118	NULL, /* Called to handle protocol-specific codes */
hexley	0:281d6ff68967	119	"IPCP" /* String name of protocol */
hexley	0:281d6ff68967	120	};
hexley	0:281d6ff68967	121
hexley	0:281d6ff68967	122	/*
hexley	0:281d6ff68967	123	* Protocol entry points from main code.
hexley	0:281d6ff68967	124	*/
hexley	0:281d6ff68967	125	static void ipcp_init (int);
hexley	0:281d6ff68967	126	static void ipcp_open (int);
hexley	0:281d6ff68967	127	static void ipcp_close (int, char *);
hexley	0:281d6ff68967	128	static void ipcp_lowerup (int);
hexley	0:281d6ff68967	129	static void ipcp_lowerdown (int);
hexley	0:281d6ff68967	130	static void ipcp_input (int, u_char *, int);
hexley	0:281d6ff68967	131	static void ipcp_protrej (int);
hexley	0:281d6ff68967	132
hexley	0:281d6ff68967	133
hexley	0:281d6ff68967	134	struct protent ipcp_protent = {
hexley	0:281d6ff68967	135	PPP_IPCP,
hexley	0:281d6ff68967	136	ipcp_init,
hexley	0:281d6ff68967	137	ipcp_input,
hexley	0:281d6ff68967	138	ipcp_protrej,
hexley	0:281d6ff68967	139	ipcp_lowerup,
hexley	0:281d6ff68967	140	ipcp_lowerdown,
hexley	0:281d6ff68967	141	ipcp_open,
hexley	0:281d6ff68967	142	ipcp_close,
hexley	0:281d6ff68967	143	#if PPP_ADDITIONAL_CALLBACKS
hexley	0:281d6ff68967	144	ipcp_printpkt,
hexley	0:281d6ff68967	145	NULL,
hexley	0:281d6ff68967	146	#endif /* PPP_ADDITIONAL_CALLBACKS */
hexley	0:281d6ff68967	147	1,
hexley	0:281d6ff68967	148	"IPCP",
hexley	0:281d6ff68967	149	#if PPP_ADDITIONAL_CALLBACKS
hexley	0:281d6ff68967	150	ip_check_options,
hexley	0:281d6ff68967	151	NULL,
hexley	0:281d6ff68967	152	ip_active_pkt
hexley	0:281d6ff68967	153	#endif /* PPP_ADDITIONAL_CALLBACKS */
hexley	0:281d6ff68967	154	};
hexley	0:281d6ff68967	155
hexley	0:281d6ff68967	156	static void ipcp_clear_addrs (int);
hexley	0:281d6ff68967	157
hexley	0:281d6ff68967	158	/*
hexley	0:281d6ff68967	159	* Lengths of configuration options.
hexley	0:281d6ff68967	160	*/
hexley	0:281d6ff68967	161	#define CILEN_VOID 2
hexley	0:281d6ff68967	162	#define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
hexley	0:281d6ff68967	163	#define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
hexley	0:281d6ff68967	164	#define CILEN_ADDR 6 /* new-style single address option */
hexley	0:281d6ff68967	165	#define CILEN_ADDRS 10 /* old-style dual address option */
hexley	0:281d6ff68967	166
hexley	0:281d6ff68967	167
hexley	0:281d6ff68967	168	#define CODENAME(x) ((x) == CONFACK ? "ACK" : \
hexley	0:281d6ff68967	169	(x) == CONFNAK ? "NAK" : "REJ")
hexley	0:281d6ff68967	170
hexley	0:281d6ff68967	171
hexley	0:281d6ff68967	172	/*
hexley	0:281d6ff68967	173	* ipcp_init - Initialize IPCP.
hexley	0:281d6ff68967	174	*/
hexley	0:281d6ff68967	175	static void
hexley	0:281d6ff68967	176	ipcp_init(int unit)
hexley	0:281d6ff68967	177	{
hexley	0:281d6ff68967	178	fsm *f = &ipcp_fsm[unit];
hexley	0:281d6ff68967	179	ipcp_options *wo = &ipcp_wantoptions[unit];
hexley	0:281d6ff68967	180	ipcp_options *ao = &ipcp_allowoptions[unit];
hexley	0:281d6ff68967	181
hexley	0:281d6ff68967	182	f->unit = unit;
hexley	0:281d6ff68967	183	f->protocol = PPP_IPCP;
hexley	0:281d6ff68967	184	f->callbacks = &ipcp_callbacks;
hexley	0:281d6ff68967	185	fsm_init(&ipcp_fsm[unit]);
hexley	0:281d6ff68967	186
hexley	0:281d6ff68967	187	memset(wo, 0, sizeof(*wo));
hexley	0:281d6ff68967	188	memset(ao, 0, sizeof(*ao));
hexley	0:281d6ff68967	189
hexley	0:281d6ff68967	190	wo->neg_addr = 1;
hexley	0:281d6ff68967	191	wo->ouraddr = 0;
hexley	0:281d6ff68967	192	#if VJ_SUPPORT
hexley	0:281d6ff68967	193	wo->neg_vj = 1;
hexley	0:281d6ff68967	194	#else /* VJ_SUPPORT */
hexley	0:281d6ff68967	195	wo->neg_vj = 0;
hexley	0:281d6ff68967	196	#endif /* VJ_SUPPORT */
hexley	0:281d6ff68967	197	wo->vj_protocol = IPCP_VJ_COMP;
hexley	0:281d6ff68967	198	wo->maxslotindex = MAX_SLOTS - 1;
hexley	0:281d6ff68967	199	wo->cflag = 0;
hexley	0:281d6ff68967	200	wo->default_route = 1;
hexley	0:281d6ff68967	201
hexley	0:281d6ff68967	202	ao->neg_addr = 1;
hexley	0:281d6ff68967	203	#if VJ_SUPPORT
hexley	0:281d6ff68967	204	ao->neg_vj = 1;
hexley	0:281d6ff68967	205	#else /* VJ_SUPPORT */
hexley	0:281d6ff68967	206	ao->neg_vj = 0;
hexley	0:281d6ff68967	207	#endif /* VJ_SUPPORT */
hexley	0:281d6ff68967	208	ao->maxslotindex = MAX_SLOTS - 1;
hexley	0:281d6ff68967	209	ao->cflag = 1;
hexley	0:281d6ff68967	210	ao->default_route = 1;
hexley	0:281d6ff68967	211	}
hexley	0:281d6ff68967	212
hexley	0:281d6ff68967	213
hexley	0:281d6ff68967	214	/*
hexley	0:281d6ff68967	215	* ipcp_open - IPCP is allowed to come up.
hexley	0:281d6ff68967	216	*/
hexley	0:281d6ff68967	217	static void
hexley	0:281d6ff68967	218	ipcp_open(int unit)
hexley	0:281d6ff68967	219	{
hexley	0:281d6ff68967	220	fsm_open(&ipcp_fsm[unit]);
hexley	0:281d6ff68967	221	}
hexley	0:281d6ff68967	222
hexley	0:281d6ff68967	223
hexley	0:281d6ff68967	224	/*
hexley	0:281d6ff68967	225	* ipcp_close - Take IPCP down.
hexley	0:281d6ff68967	226	*/
hexley	0:281d6ff68967	227	static void
hexley	0:281d6ff68967	228	ipcp_close(int unit, char *reason)
hexley	0:281d6ff68967	229	{
hexley	0:281d6ff68967	230	fsm_close(&ipcp_fsm[unit], reason);
hexley	0:281d6ff68967	231	}
hexley	0:281d6ff68967	232
hexley	0:281d6ff68967	233
hexley	0:281d6ff68967	234	/*
hexley	0:281d6ff68967	235	* ipcp_lowerup - The lower layer is up.
hexley	0:281d6ff68967	236	*/
hexley	0:281d6ff68967	237	static void
hexley	0:281d6ff68967	238	ipcp_lowerup(int unit)
hexley	0:281d6ff68967	239	{
hexley	0:281d6ff68967	240	fsm_lowerup(&ipcp_fsm[unit]);
hexley	0:281d6ff68967	241	}
hexley	0:281d6ff68967	242
hexley	0:281d6ff68967	243
hexley	0:281d6ff68967	244	/*
hexley	0:281d6ff68967	245	* ipcp_lowerdown - The lower layer is down.
hexley	0:281d6ff68967	246	*/
hexley	0:281d6ff68967	247	static void
hexley	0:281d6ff68967	248	ipcp_lowerdown(int unit)
hexley	0:281d6ff68967	249	{
hexley	0:281d6ff68967	250	fsm_lowerdown(&ipcp_fsm[unit]);
hexley	0:281d6ff68967	251	}
hexley	0:281d6ff68967	252
hexley	0:281d6ff68967	253
hexley	0:281d6ff68967	254	/*
hexley	0:281d6ff68967	255	* ipcp_input - Input IPCP packet.
hexley	0:281d6ff68967	256	*/
hexley	0:281d6ff68967	257	static void
hexley	0:281d6ff68967	258	ipcp_input(int unit, u_char *p, int len)
hexley	0:281d6ff68967	259	{
hexley	0:281d6ff68967	260	fsm_input(&ipcp_fsm[unit], p, len);
hexley	0:281d6ff68967	261	}
hexley	0:281d6ff68967	262
hexley	0:281d6ff68967	263
hexley	0:281d6ff68967	264	/*
hexley	0:281d6ff68967	265	* ipcp_protrej - A Protocol-Reject was received for IPCP.
hexley	0:281d6ff68967	266	*
hexley	0:281d6ff68967	267	* Pretend the lower layer went down, so we shut up.
hexley	0:281d6ff68967	268	*/
hexley	0:281d6ff68967	269	static void
hexley	0:281d6ff68967	270	ipcp_protrej(int unit)
hexley	0:281d6ff68967	271	{
hexley	0:281d6ff68967	272	fsm_lowerdown(&ipcp_fsm[unit]);
hexley	0:281d6ff68967	273	}
hexley	0:281d6ff68967	274
hexley	0:281d6ff68967	275
hexley	0:281d6ff68967	276	/*
hexley	0:281d6ff68967	277	* ipcp_resetci - Reset our CI.
hexley	0:281d6ff68967	278	*/
hexley	0:281d6ff68967	279	static void
hexley	0:281d6ff68967	280	ipcp_resetci(fsm *f)
hexley	0:281d6ff68967	281	{
hexley	0:281d6ff68967	282	ipcp_options *wo = &ipcp_wantoptions[f->unit];
hexley	0:281d6ff68967	283
hexley	0:281d6ff68967	284	wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
hexley	0:281d6ff68967	285	if (wo->ouraddr == 0) {
hexley	0:281d6ff68967	286	wo->accept_local = 1;
hexley	0:281d6ff68967	287	}
hexley	0:281d6ff68967	288	if (wo->hisaddr == 0) {
hexley	0:281d6ff68967	289	wo->accept_remote = 1;
hexley	0:281d6ff68967	290	}
hexley	0:281d6ff68967	291	/* Request DNS addresses from the peer */
hexley	0:281d6ff68967	292	wo->req_dns1 = ppp_settings.usepeerdns;
hexley	0:281d6ff68967	293	wo->req_dns2 = ppp_settings.usepeerdns;
hexley	0:281d6ff68967	294	ipcp_gotoptions[f->unit] = *wo;
hexley	0:281d6ff68967	295	cis_received[f->unit] = 0;
hexley	0:281d6ff68967	296	}
hexley	0:281d6ff68967	297
hexley	0:281d6ff68967	298
hexley	0:281d6ff68967	299	/*
hexley	0:281d6ff68967	300	* ipcp_cilen - Return length of our CI.
hexley	0:281d6ff68967	301	*/
hexley	0:281d6ff68967	302	static int
hexley	0:281d6ff68967	303	ipcp_cilen(fsm *f)
hexley	0:281d6ff68967	304	{
hexley	0:281d6ff68967	305	ipcp_options *go = &ipcp_gotoptions[f->unit];
hexley	0:281d6ff68967	306	ipcp_options *wo = &ipcp_wantoptions[f->unit];
hexley	0:281d6ff68967	307	ipcp_options *ho = &ipcp_hisoptions[f->unit];
hexley	0:281d6ff68967	308
hexley	0:281d6ff68967	309	#define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
hexley	0:281d6ff68967	310	#define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
hexley	0:281d6ff68967	311	#define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
hexley	0:281d6ff68967	312
hexley	0:281d6ff68967	313	/*
hexley	0:281d6ff68967	314	* First see if we want to change our options to the old
hexley	0:281d6ff68967	315	* forms because we have received old forms from the peer.
hexley	0:281d6ff68967	316	*/
hexley	0:281d6ff68967	317	if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
hexley	0:281d6ff68967	318	/* use the old style of address negotiation */
hexley	0:281d6ff68967	319	go->neg_addr = 1;
hexley	0:281d6ff68967	320	go->old_addrs = 1;
hexley	0:281d6ff68967	321	}
hexley	0:281d6ff68967	322	if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
hexley	0:281d6ff68967	323	/* try an older style of VJ negotiation */
hexley	0:281d6ff68967	324	if (cis_received[f->unit] == 0) {
hexley	0:281d6ff68967	325	/* keep trying the new style until we see some CI from the peer */
hexley	0:281d6ff68967	326	go->neg_vj = 1;
hexley	0:281d6ff68967	327	} else {
hexley	0:281d6ff68967	328	/* use the old style only if the peer did */
hexley	0:281d6ff68967	329	if (ho->neg_vj && ho->old_vj) {
hexley	0:281d6ff68967	330	go->neg_vj = 1;
hexley	0:281d6ff68967	331	go->old_vj = 1;
hexley	0:281d6ff68967	332	go->vj_protocol = ho->vj_protocol;
hexley	0:281d6ff68967	333	}
hexley	0:281d6ff68967	334	}
hexley	0:281d6ff68967	335	}
hexley	0:281d6ff68967	336
hexley	0:281d6ff68967	337	return (LENCIADDR(go->neg_addr, go->old_addrs) +
hexley	0:281d6ff68967	338	LENCIVJ(go->neg_vj, go->old_vj) +
hexley	0:281d6ff68967	339	LENCIDNS(go->req_dns1) +
hexley	0:281d6ff68967	340	LENCIDNS(go->req_dns2));
hexley	0:281d6ff68967	341	}
hexley	0:281d6ff68967	342
hexley	0:281d6ff68967	343
hexley	0:281d6ff68967	344	/*
hexley	0:281d6ff68967	345	* ipcp_addci - Add our desired CIs to a packet.
hexley	0:281d6ff68967	346	*/
hexley	0:281d6ff68967	347	static void
hexley	0:281d6ff68967	348	ipcp_addci(fsm f, u_char ucp, int *lenp)
hexley	0:281d6ff68967	349	{
hexley	0:281d6ff68967	350	ipcp_options *go = &ipcp_gotoptions[f->unit];
hexley	0:281d6ff68967	351	int len = *lenp;
hexley	0:281d6ff68967	352
hexley	0:281d6ff68967	353	#define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
hexley	0:281d6ff68967	354	if (neg) { \
hexley	0:281d6ff68967	355	int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
hexley	0:281d6ff68967	356	if (len >= vjlen) { \
hexley	0:281d6ff68967	357	PUTCHAR(opt, ucp); \
hexley	0:281d6ff68967	358	PUTCHAR(vjlen, ucp); \
hexley	0:281d6ff68967	359	PUTSHORT(val, ucp); \
hexley	0:281d6ff68967	360	if (!old) { \
hexley	0:281d6ff68967	361	PUTCHAR(maxslotindex, ucp); \
hexley	0:281d6ff68967	362	PUTCHAR(cflag, ucp); \
hexley	0:281d6ff68967	363	} \
hexley	0:281d6ff68967	364	len -= vjlen; \
hexley	0:281d6ff68967	365	} else { \
hexley	0:281d6ff68967	366	neg = 0; \
hexley	0:281d6ff68967	367	} \
hexley	0:281d6ff68967	368	}
hexley	0:281d6ff68967	369
hexley	0:281d6ff68967	370	#define ADDCIADDR(opt, neg, old, val1, val2) \
hexley	0:281d6ff68967	371	if (neg) { \
hexley	0:281d6ff68967	372	int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
hexley	0:281d6ff68967	373	if (len >= addrlen) { \
hexley	0:281d6ff68967	374	u32_t l; \
hexley	0:281d6ff68967	375	PUTCHAR(opt, ucp); \
hexley	0:281d6ff68967	376	PUTCHAR(addrlen, ucp); \
hexley	0:281d6ff68967	377	l = ntohl(val1); \
hexley	0:281d6ff68967	378	PUTLONG(l, ucp); \
hexley	0:281d6ff68967	379	if (old) { \
hexley	0:281d6ff68967	380	l = ntohl(val2); \
hexley	0:281d6ff68967	381	PUTLONG(l, ucp); \
hexley	0:281d6ff68967	382	} \
hexley	0:281d6ff68967	383	len -= addrlen; \
hexley	0:281d6ff68967	384	} else { \
hexley	0:281d6ff68967	385	neg = 0; \
hexley	0:281d6ff68967	386	} \
hexley	0:281d6ff68967	387	}
hexley	0:281d6ff68967	388
hexley	0:281d6ff68967	389	#define ADDCIDNS(opt, neg, addr) \
hexley	0:281d6ff68967	390	if (neg) { \
hexley	0:281d6ff68967	391	if (len >= CILEN_ADDR) { \
hexley	0:281d6ff68967	392	u32_t l; \
hexley	0:281d6ff68967	393	PUTCHAR(opt, ucp); \
hexley	0:281d6ff68967	394	PUTCHAR(CILEN_ADDR, ucp); \
hexley	0:281d6ff68967	395	l = ntohl(addr); \
hexley	0:281d6ff68967	396	PUTLONG(l, ucp); \
hexley	0:281d6ff68967	397	len -= CILEN_ADDR; \
hexley	0:281d6ff68967	398	} else { \
hexley	0:281d6ff68967	399	neg = 0; \
hexley	0:281d6ff68967	400	} \
hexley	0:281d6ff68967	401	}
hexley	0:281d6ff68967	402
hexley	0:281d6ff68967	403	ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
hexley	0:281d6ff68967	404	go->old_addrs, go->ouraddr, go->hisaddr);
hexley	0:281d6ff68967	405
hexley	0:281d6ff68967	406	ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
hexley	0:281d6ff68967	407	go->maxslotindex, go->cflag);
hexley	0:281d6ff68967	408
hexley	0:281d6ff68967	409	ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
hexley	0:281d6ff68967	410
hexley	0:281d6ff68967	411	ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
hexley	0:281d6ff68967	412
hexley	0:281d6ff68967	413	*lenp -= len;
hexley	0:281d6ff68967	414	}
hexley	0:281d6ff68967	415
hexley	0:281d6ff68967	416
hexley	0:281d6ff68967	417	/*
hexley	0:281d6ff68967	418	* ipcp_ackci - Ack our CIs.
hexley	0:281d6ff68967	419	*
hexley	0:281d6ff68967	420	* Returns:
hexley	0:281d6ff68967	421	* 0 - Ack was bad.
hexley	0:281d6ff68967	422	* 1 - Ack was good.
hexley	0:281d6ff68967	423	*/
hexley	0:281d6ff68967	424	static int
hexley	0:281d6ff68967	425	ipcp_ackci(fsm f, u_char p, int len)
hexley	0:281d6ff68967	426	{
hexley	0:281d6ff68967	427	ipcp_options *go = &ipcp_gotoptions[f->unit];
hexley	0:281d6ff68967	428	u_short cilen, citype, cishort;
hexley	0:281d6ff68967	429	u32_t cilong;
hexley	0:281d6ff68967	430	u_char cimaxslotindex, cicflag;
hexley	0:281d6ff68967	431
hexley	0:281d6ff68967	432	/*
hexley	0:281d6ff68967	433	* CIs must be in exactly the same order that we sent...
hexley	0:281d6ff68967	434	* Check packet length and CI length at each step.
hexley	0:281d6ff68967	435	* If we find any deviations, then this packet is bad.
hexley	0:281d6ff68967	436	*/
hexley	0:281d6ff68967	437
hexley	0:281d6ff68967	438	#define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
hexley	0:281d6ff68967	439	if (neg) { \
hexley	0:281d6ff68967	440	int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
hexley	0:281d6ff68967	441	if ((len -= vjlen) < 0) { \
hexley	0:281d6ff68967	442	goto bad; \
hexley	0:281d6ff68967	443	} \
hexley	0:281d6ff68967	444	GETCHAR(citype, p); \
hexley	0:281d6ff68967	445	GETCHAR(cilen, p); \
hexley	0:281d6ff68967	446	if (cilen != vjlen \|\| \
hexley	0:281d6ff68967	447	citype != opt) { \
hexley	0:281d6ff68967	448	goto bad; \
hexley	0:281d6ff68967	449	} \
hexley	0:281d6ff68967	450	GETSHORT(cishort, p); \
hexley	0:281d6ff68967	451	if (cishort != val) { \
hexley	0:281d6ff68967	452	goto bad; \
hexley	0:281d6ff68967	453	} \
hexley	0:281d6ff68967	454	if (!old) { \
hexley	0:281d6ff68967	455	GETCHAR(cimaxslotindex, p); \
hexley	0:281d6ff68967	456	if (cimaxslotindex != maxslotindex) { \
hexley	0:281d6ff68967	457	goto bad; \
hexley	0:281d6ff68967	458	} \
hexley	0:281d6ff68967	459	GETCHAR(cicflag, p); \
hexley	0:281d6ff68967	460	if (cicflag != cflag) { \
hexley	0:281d6ff68967	461	goto bad; \
hexley	0:281d6ff68967	462	} \
hexley	0:281d6ff68967	463	} \
hexley	0:281d6ff68967	464	}
hexley	0:281d6ff68967	465
hexley	0:281d6ff68967	466	#define ACKCIADDR(opt, neg, old, val1, val2) \
hexley	0:281d6ff68967	467	if (neg) { \
hexley	0:281d6ff68967	468	int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
hexley	0:281d6ff68967	469	u32_t l; \
hexley	0:281d6ff68967	470	if ((len -= addrlen) < 0) { \
hexley	0:281d6ff68967	471	goto bad; \
hexley	0:281d6ff68967	472	} \
hexley	0:281d6ff68967	473	GETCHAR(citype, p); \
hexley	0:281d6ff68967	474	GETCHAR(cilen, p); \
hexley	0:281d6ff68967	475	if (cilen != addrlen \|\| \
hexley	0:281d6ff68967	476	citype != opt) { \
hexley	0:281d6ff68967	477	goto bad; \
hexley	0:281d6ff68967	478	} \
hexley	0:281d6ff68967	479	GETLONG(l, p); \
hexley	0:281d6ff68967	480	cilong = htonl(l); \
hexley	0:281d6ff68967	481	if (val1 != cilong) { \
hexley	0:281d6ff68967	482	goto bad; \
hexley	0:281d6ff68967	483	} \
hexley	0:281d6ff68967	484	if (old) { \
hexley	0:281d6ff68967	485	GETLONG(l, p); \
hexley	0:281d6ff68967	486	cilong = htonl(l); \
hexley	0:281d6ff68967	487	if (val2 != cilong) { \
hexley	0:281d6ff68967	488	goto bad; \
hexley	0:281d6ff68967	489	} \
hexley	0:281d6ff68967	490	} \
hexley	0:281d6ff68967	491	}
hexley	0:281d6ff68967	492
hexley	0:281d6ff68967	493	#define ACKCIDNS(opt, neg, addr) \
hexley	0:281d6ff68967	494	if (neg) { \
hexley	0:281d6ff68967	495	u32_t l; \
hexley	0:281d6ff68967	496	if ((len -= CILEN_ADDR) < 0) { \
hexley	0:281d6ff68967	497	goto bad; \
hexley	0:281d6ff68967	498	} \
hexley	0:281d6ff68967	499	GETCHAR(citype, p); \
hexley	0:281d6ff68967	500	GETCHAR(cilen, p); \
hexley	0:281d6ff68967	501	if (cilen != CILEN_ADDR \|\| \
hexley	0:281d6ff68967	502	citype != opt) { \
hexley	0:281d6ff68967	503	goto bad; \
hexley	0:281d6ff68967	504	} \
hexley	0:281d6ff68967	505	GETLONG(l, p); \
hexley	0:281d6ff68967	506	cilong = htonl(l); \
hexley	0:281d6ff68967	507	if (addr != cilong) { \
hexley	0:281d6ff68967	508	goto bad; \
hexley	0:281d6ff68967	509	} \
hexley	0:281d6ff68967	510	}
hexley	0:281d6ff68967	511
hexley	0:281d6ff68967	512	ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
hexley	0:281d6ff68967	513	go->old_addrs, go->ouraddr, go->hisaddr);
hexley	0:281d6ff68967	514
hexley	0:281d6ff68967	515	ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
hexley	0:281d6ff68967	516	go->maxslotindex, go->cflag);
hexley	0:281d6ff68967	517
hexley	0:281d6ff68967	518	ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
hexley	0:281d6ff68967	519
hexley	0:281d6ff68967	520	ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
hexley	0:281d6ff68967	521
hexley	0:281d6ff68967	522	/*
hexley	0:281d6ff68967	523	* If there are any remaining CIs, then this packet is bad.
hexley	0:281d6ff68967	524	*/
hexley	0:281d6ff68967	525	if (len != 0) {
hexley	0:281d6ff68967	526	goto bad;
hexley	0:281d6ff68967	527	}
hexley	0:281d6ff68967	528	return (1);
hexley	0:281d6ff68967	529
hexley	0:281d6ff68967	530	bad:
hexley	0:281d6ff68967	531	IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
hexley	0:281d6ff68967	532	return (0);
hexley	0:281d6ff68967	533	}
hexley	0:281d6ff68967	534
hexley	0:281d6ff68967	535	/*
hexley	0:281d6ff68967	536	* ipcp_nakci - Peer has sent a NAK for some of our CIs.
hexley	0:281d6ff68967	537	* This should not modify any state if the Nak is bad
hexley	0:281d6ff68967	538	* or if IPCP is in the LS_OPENED state.
hexley	0:281d6ff68967	539	*
hexley	0:281d6ff68967	540	* Returns:
hexley	0:281d6ff68967	541	* 0 - Nak was bad.
hexley	0:281d6ff68967	542	* 1 - Nak was good.
hexley	0:281d6ff68967	543	*/
hexley	0:281d6ff68967	544	static int
hexley	0:281d6ff68967	545	ipcp_nakci(fsm f, u_char p, int len)
hexley	0:281d6ff68967	546	{
hexley	0:281d6ff68967	547	ipcp_options *go = &ipcp_gotoptions[f->unit];
hexley	0:281d6ff68967	548	u_char cimaxslotindex, cicflag;
hexley	0:281d6ff68967	549	u_char citype, cilen, *next;
hexley	0:281d6ff68967	550	u_short cishort;
hexley	0:281d6ff68967	551	u32_t ciaddr1, ciaddr2, l, cidnsaddr;
hexley	0:281d6ff68967	552	ipcp_options no; /* options we've seen Naks for */
hexley	0:281d6ff68967	553	ipcp_options try; /* options to request next time */
hexley	0:281d6ff68967	554
hexley	0:281d6ff68967	555	BZERO(&no, sizeof(no));
hexley	0:281d6ff68967	556	try = *go;
hexley	0:281d6ff68967	557
hexley	0:281d6ff68967	558	/*
hexley	0:281d6ff68967	559	* Any Nak'd CIs must be in exactly the same order that we sent.
hexley	0:281d6ff68967	560	* Check packet length and CI length at each step.
hexley	0:281d6ff68967	561	* If we find any deviations, then this packet is bad.
hexley	0:281d6ff68967	562	*/
hexley	0:281d6ff68967	563	#define NAKCIADDR(opt, neg, old, code) \
hexley	0:281d6ff68967	564	if (go->neg && \
hexley	0:281d6ff68967	565	len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
hexley	0:281d6ff68967	566	p[1] == cilen && \
hexley	0:281d6ff68967	567	p[0] == opt) { \
hexley	0:281d6ff68967	568	len -= cilen; \
hexley	0:281d6ff68967	569	INCPTR(2, p); \
hexley	0:281d6ff68967	570	GETLONG(l, p); \
hexley	0:281d6ff68967	571	ciaddr1 = htonl(l); \
hexley	0:281d6ff68967	572	if (old) { \
hexley	0:281d6ff68967	573	GETLONG(l, p); \
hexley	0:281d6ff68967	574	ciaddr2 = htonl(l); \
hexley	0:281d6ff68967	575	no.old_addrs = 1; \
hexley	0:281d6ff68967	576	} else { \
hexley	0:281d6ff68967	577	ciaddr2 = 0; \
hexley	0:281d6ff68967	578	} \
hexley	0:281d6ff68967	579	no.neg = 1; \
hexley	0:281d6ff68967	580	code \
hexley	0:281d6ff68967	581	}
hexley	0:281d6ff68967	582
hexley	0:281d6ff68967	583	#define NAKCIVJ(opt, neg, code) \
hexley	0:281d6ff68967	584	if (go->neg && \
hexley	0:281d6ff68967	585	((cilen = p[1]) == CILEN_COMPRESS \|\| cilen == CILEN_VJ) && \
hexley	0:281d6ff68967	586	len >= cilen && \
hexley	0:281d6ff68967	587	p[0] == opt) { \
hexley	0:281d6ff68967	588	len -= cilen; \
hexley	0:281d6ff68967	589	INCPTR(2, p); \
hexley	0:281d6ff68967	590	GETSHORT(cishort, p); \
hexley	0:281d6ff68967	591	no.neg = 1; \
hexley	0:281d6ff68967	592	code \
hexley	0:281d6ff68967	593	}
hexley	0:281d6ff68967	594
hexley	0:281d6ff68967	595	#define NAKCIDNS(opt, neg, code) \
hexley	0:281d6ff68967	596	if (go->neg && \
hexley	0:281d6ff68967	597	((cilen = p[1]) == CILEN_ADDR) && \
hexley	0:281d6ff68967	598	len >= cilen && \
hexley	0:281d6ff68967	599	p[0] == opt) { \
hexley	0:281d6ff68967	600	len -= cilen; \
hexley	0:281d6ff68967	601	INCPTR(2, p); \
hexley	0:281d6ff68967	602	GETLONG(l, p); \
hexley	0:281d6ff68967	603	cidnsaddr = htonl(l); \
hexley	0:281d6ff68967	604	no.neg = 1; \
hexley	0:281d6ff68967	605	code \
hexley	0:281d6ff68967	606	}
hexley	0:281d6ff68967	607
hexley	0:281d6ff68967	608	/*
hexley	0:281d6ff68967	609	* Accept the peer's idea of {our,his} address, if different
hexley	0:281d6ff68967	610	* from our idea, only if the accept_{local,remote} flag is set.
hexley	0:281d6ff68967	611	*/
hexley	0:281d6ff68967	612	NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
hexley	0:281d6ff68967	613	if (go->accept_local && ciaddr1) { /* Do we know our address? */
hexley	0:281d6ff68967	614	try.ouraddr = ciaddr1;
hexley	0:281d6ff68967	615	IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
hexley	0:281d6ff68967	616	inet_ntoa(ciaddr1)));
hexley	0:281d6ff68967	617	}
hexley	0:281d6ff68967	618	if (go->accept_remote && ciaddr2) { /* Does he know his? */
hexley	0:281d6ff68967	619	try.hisaddr = ciaddr2;
hexley	0:281d6ff68967	620	IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
hexley	0:281d6ff68967	621	inet_ntoa(ciaddr2)));
hexley	0:281d6ff68967	622	}
hexley	0:281d6ff68967	623	);
hexley	0:281d6ff68967	624
hexley	0:281d6ff68967	625	/*
hexley	0:281d6ff68967	626	* Accept the peer's value of maxslotindex provided that it
hexley	0:281d6ff68967	627	* is less than what we asked for. Turn off slot-ID compression
hexley	0:281d6ff68967	628	* if the peer wants. Send old-style compress-type option if
hexley	0:281d6ff68967	629	* the peer wants.
hexley	0:281d6ff68967	630	*/
hexley	0:281d6ff68967	631	NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
hexley	0:281d6ff68967	632	if (cilen == CILEN_VJ) {
hexley	0:281d6ff68967	633	GETCHAR(cimaxslotindex, p);
hexley	0:281d6ff68967	634	GETCHAR(cicflag, p);
hexley	0:281d6ff68967	635	if (cishort == IPCP_VJ_COMP) {
hexley	0:281d6ff68967	636	try.old_vj = 0;
hexley	0:281d6ff68967	637	if (cimaxslotindex < go->maxslotindex) {
hexley	0:281d6ff68967	638	try.maxslotindex = cimaxslotindex;
hexley	0:281d6ff68967	639	}
hexley	0:281d6ff68967	640	if (!cicflag) {
hexley	0:281d6ff68967	641	try.cflag = 0;
hexley	0:281d6ff68967	642	}
hexley	0:281d6ff68967	643	} else {
hexley	0:281d6ff68967	644	try.neg_vj = 0;
hexley	0:281d6ff68967	645	}
hexley	0:281d6ff68967	646	} else {
hexley	0:281d6ff68967	647	if (cishort == IPCP_VJ_COMP \|\| cishort == IPCP_VJ_COMP_OLD) {
hexley	0:281d6ff68967	648	try.old_vj = 1;
hexley	0:281d6ff68967	649	try.vj_protocol = cishort;
hexley	0:281d6ff68967	650	} else {
hexley	0:281d6ff68967	651	try.neg_vj = 0;
hexley	0:281d6ff68967	652	}
hexley	0:281d6ff68967	653	}
hexley	0:281d6ff68967	654	);
hexley	0:281d6ff68967	655
hexley	0:281d6ff68967	656	NAKCIDNS(CI_MS_DNS1, req_dns1,
hexley	0:281d6ff68967	657	try.dnsaddr[0] = cidnsaddr;
hexley	0:281d6ff68967	658	IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
hexley	0:281d6ff68967	659	);
hexley	0:281d6ff68967	660
hexley	0:281d6ff68967	661	NAKCIDNS(CI_MS_DNS2, req_dns2,
hexley	0:281d6ff68967	662	try.dnsaddr[1] = cidnsaddr;
hexley	0:281d6ff68967	663	IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
hexley	0:281d6ff68967	664	);
hexley	0:281d6ff68967	665
hexley	0:281d6ff68967	666	/*
hexley	0:281d6ff68967	667	* There may be remaining CIs, if the peer is requesting negotiation
hexley	0:281d6ff68967	668	* on an option that we didn't include in our request packet.
hexley	0:281d6ff68967	669	* If they want to negotiate about IP addresses, we comply.
hexley	0:281d6ff68967	670	* If they want us to ask for compression, we refuse.
hexley	0:281d6ff68967	671	*/
hexley	0:281d6ff68967	672	while (len > CILEN_VOID) {
hexley	0:281d6ff68967	673	GETCHAR(citype, p);
hexley	0:281d6ff68967	674	GETCHAR(cilen, p);
hexley	0:281d6ff68967	675	if( (len -= cilen) < 0 ) {
hexley	0:281d6ff68967	676	goto bad;
hexley	0:281d6ff68967	677	}
hexley	0:281d6ff68967	678	next = p + cilen - 2;
hexley	0:281d6ff68967	679
hexley	0:281d6ff68967	680	switch (citype) {
hexley	0:281d6ff68967	681	case CI_COMPRESSTYPE:
hexley	0:281d6ff68967	682	if (go->neg_vj \|\| no.neg_vj \|\|
hexley	0:281d6ff68967	683	(cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
hexley	0:281d6ff68967	684	goto bad;
hexley	0:281d6ff68967	685	}
hexley	0:281d6ff68967	686	no.neg_vj = 1;
hexley	0:281d6ff68967	687	break;
hexley	0:281d6ff68967	688	case CI_ADDRS:
hexley	0:281d6ff68967	689	if ((go->neg_addr && go->old_addrs) \|\| no.old_addrs
hexley	0:281d6ff68967	690	\|\| cilen != CILEN_ADDRS) {
hexley	0:281d6ff68967	691	goto bad;
hexley	0:281d6ff68967	692	}
hexley	0:281d6ff68967	693	try.neg_addr = 1;
hexley	0:281d6ff68967	694	try.old_addrs = 1;
hexley	0:281d6ff68967	695	GETLONG(l, p);
hexley	0:281d6ff68967	696	ciaddr1 = htonl(l);
hexley	0:281d6ff68967	697	if (ciaddr1 && go->accept_local) {
hexley	0:281d6ff68967	698	try.ouraddr = ciaddr1;
hexley	0:281d6ff68967	699	}
hexley	0:281d6ff68967	700	GETLONG(l, p);
hexley	0:281d6ff68967	701	ciaddr2 = htonl(l);
hexley	0:281d6ff68967	702	if (ciaddr2 && go->accept_remote) {
hexley	0:281d6ff68967	703	try.hisaddr = ciaddr2;
hexley	0:281d6ff68967	704	}
hexley	0:281d6ff68967	705	no.old_addrs = 1;
hexley	0:281d6ff68967	706	break;
hexley	0:281d6ff68967	707	case CI_ADDR:
hexley	0:281d6ff68967	708	if (go->neg_addr \|\| no.neg_addr \|\| cilen != CILEN_ADDR) {
hexley	0:281d6ff68967	709	goto bad;
hexley	0:281d6ff68967	710	}
hexley	0:281d6ff68967	711	try.old_addrs = 0;
hexley	0:281d6ff68967	712	GETLONG(l, p);
hexley	0:281d6ff68967	713	ciaddr1 = htonl(l);
hexley	0:281d6ff68967	714	if (ciaddr1 && go->accept_local) {
hexley	0:281d6ff68967	715	try.ouraddr = ciaddr1;
hexley	0:281d6ff68967	716	}
hexley	0:281d6ff68967	717	if (try.ouraddr != 0) {
hexley	0:281d6ff68967	718	try.neg_addr = 1;
hexley	0:281d6ff68967	719	}
hexley	0:281d6ff68967	720	no.neg_addr = 1;
hexley	0:281d6ff68967	721	break;
hexley	0:281d6ff68967	722	}
hexley	0:281d6ff68967	723	p = next;
hexley	0:281d6ff68967	724	}
hexley	0:281d6ff68967	725
hexley	0:281d6ff68967	726	/* If there is still anything left, this packet is bad. */
hexley	0:281d6ff68967	727	if (len != 0) {
hexley	0:281d6ff68967	728	goto bad;
hexley	0:281d6ff68967	729	}
hexley	0:281d6ff68967	730
hexley	0:281d6ff68967	731	/*
hexley	0:281d6ff68967	732	* OK, the Nak is good. Now we can update state.
hexley	0:281d6ff68967	733	*/
hexley	0:281d6ff68967	734	if (f->state != LS_OPENED) {
hexley	0:281d6ff68967	735	*go = try;
hexley	0:281d6ff68967	736	}
hexley	0:281d6ff68967	737
hexley	0:281d6ff68967	738	return 1;
hexley	0:281d6ff68967	739
hexley	0:281d6ff68967	740	bad:
hexley	0:281d6ff68967	741	IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
hexley	0:281d6ff68967	742	return 0;
hexley	0:281d6ff68967	743	}
hexley	0:281d6ff68967	744
hexley	0:281d6ff68967	745
hexley	0:281d6ff68967	746	/*
hexley	0:281d6ff68967	747	* ipcp_rejci - Reject some of our CIs.
hexley	0:281d6ff68967	748	*/
hexley	0:281d6ff68967	749	static int
hexley	0:281d6ff68967	750	ipcp_rejci(fsm f, u_char p, int len)
hexley	0:281d6ff68967	751	{
hexley	0:281d6ff68967	752	ipcp_options *go = &ipcp_gotoptions[f->unit];
hexley	0:281d6ff68967	753	u_char cimaxslotindex, ciflag, cilen;
hexley	0:281d6ff68967	754	u_short cishort;
hexley	0:281d6ff68967	755	u32_t cilong;
hexley	0:281d6ff68967	756	ipcp_options try; /* options to request next time */
hexley	0:281d6ff68967	757
hexley	0:281d6ff68967	758	try = *go;
hexley	0:281d6ff68967	759	/*
hexley	0:281d6ff68967	760	* Any Rejected CIs must be in exactly the same order that we sent.
hexley	0:281d6ff68967	761	* Check packet length and CI length at each step.
hexley	0:281d6ff68967	762	* If we find any deviations, then this packet is bad.
hexley	0:281d6ff68967	763	*/
hexley	0:281d6ff68967	764	#define REJCIADDR(opt, neg, old, val1, val2) \
hexley	0:281d6ff68967	765	if (go->neg && \
hexley	0:281d6ff68967	766	len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
hexley	0:281d6ff68967	767	p[1] == cilen && \
hexley	0:281d6ff68967	768	p[0] == opt) { \
hexley	0:281d6ff68967	769	u32_t l; \
hexley	0:281d6ff68967	770	len -= cilen; \
hexley	0:281d6ff68967	771	INCPTR(2, p); \
hexley	0:281d6ff68967	772	GETLONG(l, p); \
hexley	0:281d6ff68967	773	cilong = htonl(l); \
hexley	0:281d6ff68967	774	/* Check rejected value. */ \
hexley	0:281d6ff68967	775	if (cilong != val1) { \
hexley	0:281d6ff68967	776	goto bad; \
hexley	0:281d6ff68967	777	} \
hexley	0:281d6ff68967	778	if (old) { \
hexley	0:281d6ff68967	779	GETLONG(l, p); \
hexley	0:281d6ff68967	780	cilong = htonl(l); \
hexley	0:281d6ff68967	781	/* Check rejected value. */ \
hexley	0:281d6ff68967	782	if (cilong != val2) { \
hexley	0:281d6ff68967	783	goto bad; \
hexley	0:281d6ff68967	784	} \
hexley	0:281d6ff68967	785	} \
hexley	0:281d6ff68967	786	try.neg = 0; \
hexley	0:281d6ff68967	787	}
hexley	0:281d6ff68967	788
hexley	0:281d6ff68967	789	#define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
hexley	0:281d6ff68967	790	if (go->neg && \
hexley	0:281d6ff68967	791	p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
hexley	0:281d6ff68967	792	len >= p[1] && \
hexley	0:281d6ff68967	793	p[0] == opt) { \
hexley	0:281d6ff68967	794	len -= p[1]; \
hexley	0:281d6ff68967	795	INCPTR(2, p); \
hexley	0:281d6ff68967	796	GETSHORT(cishort, p); \
hexley	0:281d6ff68967	797	/* Check rejected value. */ \
hexley	0:281d6ff68967	798	if (cishort != val) { \
hexley	0:281d6ff68967	799	goto bad; \
hexley	0:281d6ff68967	800	} \
hexley	0:281d6ff68967	801	if (!old) { \
hexley	0:281d6ff68967	802	GETCHAR(cimaxslotindex, p); \
hexley	0:281d6ff68967	803	if (cimaxslotindex != maxslot) { \
hexley	0:281d6ff68967	804	goto bad; \
hexley	0:281d6ff68967	805	} \
hexley	0:281d6ff68967	806	GETCHAR(ciflag, p); \
hexley	0:281d6ff68967	807	if (ciflag != cflag) { \
hexley	0:281d6ff68967	808	goto bad; \
hexley	0:281d6ff68967	809	} \
hexley	0:281d6ff68967	810	} \
hexley	0:281d6ff68967	811	try.neg = 0; \
hexley	0:281d6ff68967	812	}
hexley	0:281d6ff68967	813
hexley	0:281d6ff68967	814	#define REJCIDNS(opt, neg, dnsaddr) \
hexley	0:281d6ff68967	815	if (go->neg && \
hexley	0:281d6ff68967	816	((cilen = p[1]) == CILEN_ADDR) && \
hexley	0:281d6ff68967	817	len >= cilen && \
hexley	0:281d6ff68967	818	p[0] == opt) { \
hexley	0:281d6ff68967	819	u32_t l; \
hexley	0:281d6ff68967	820	len -= cilen; \
hexley	0:281d6ff68967	821	INCPTR(2, p); \
hexley	0:281d6ff68967	822	GETLONG(l, p); \
hexley	0:281d6ff68967	823	cilong = htonl(l); \
hexley	0:281d6ff68967	824	/* Check rejected value. */ \
hexley	0:281d6ff68967	825	if (cilong != dnsaddr) { \
hexley	0:281d6ff68967	826	goto bad; \
hexley	0:281d6ff68967	827	} \
hexley	0:281d6ff68967	828	try.neg = 0; \
hexley	0:281d6ff68967	829	}
hexley	0:281d6ff68967	830
hexley	0:281d6ff68967	831	REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
hexley	0:281d6ff68967	832	go->old_addrs, go->ouraddr, go->hisaddr);
hexley	0:281d6ff68967	833
hexley	0:281d6ff68967	834	REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
hexley	0:281d6ff68967	835	go->maxslotindex, go->cflag);
hexley	0:281d6ff68967	836
hexley	0:281d6ff68967	837	REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
hexley	0:281d6ff68967	838
hexley	0:281d6ff68967	839	REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
hexley	0:281d6ff68967	840
hexley	0:281d6ff68967	841	/*
hexley	0:281d6ff68967	842	* If there are any remaining CIs, then this packet is bad.
hexley	0:281d6ff68967	843	*/
hexley	0:281d6ff68967	844	if (len != 0) {
hexley	0:281d6ff68967	845	goto bad;
hexley	0:281d6ff68967	846	}
hexley	0:281d6ff68967	847	/*
hexley	0:281d6ff68967	848	* Now we can update state.
hexley	0:281d6ff68967	849	*/
hexley	0:281d6ff68967	850	if (f->state != LS_OPENED) {
hexley	0:281d6ff68967	851	*go = try;
hexley	0:281d6ff68967	852	}
hexley	0:281d6ff68967	853	return 1;
hexley	0:281d6ff68967	854
hexley	0:281d6ff68967	855	bad:
hexley	0:281d6ff68967	856	IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
hexley	0:281d6ff68967	857	return 0;
hexley	0:281d6ff68967	858	}
hexley	0:281d6ff68967	859
hexley	0:281d6ff68967	860
hexley	0:281d6ff68967	861	/*
hexley	0:281d6ff68967	862	* ipcp_reqci - Check the peer's requested CIs and send appropriate response.
hexley	0:281d6ff68967	863	*
hexley	0:281d6ff68967	864	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
hexley	0:281d6ff68967	865	* appropriately. If reject_if_disagree is non-zero, doesn't return
hexley	0:281d6ff68967	866	* CONFNAK; returns CONFREJ if it can't return CONFACK.
hexley	0:281d6ff68967	867	*/
hexley	0:281d6ff68967	868	static int
hexley	0:281d6ff68967	869	ipcp_reqci(fsm f, u_char inp/* Requested CIs /,int len/* Length of requested CIs */,int reject_if_disagree)
hexley	0:281d6ff68967	870	{
hexley	0:281d6ff68967	871	ipcp_options *wo = &ipcp_wantoptions[f->unit];
hexley	0:281d6ff68967	872	ipcp_options *ho = &ipcp_hisoptions[f->unit];
hexley	0:281d6ff68967	873	ipcp_options *ao = &ipcp_allowoptions[f->unit];
hexley	0:281d6ff68967	874	#ifdef OLD_CI_ADDRS
hexley	0:281d6ff68967	875	ipcp_options *go = &ipcp_gotoptions[f->unit];
hexley	0:281d6ff68967	876	#endif
hexley	0:281d6ff68967	877	u_char cip, next; /* Pointer to current and next CIs */
hexley	0:281d6ff68967	878	u_short cilen, citype; /* Parsed len, type */
hexley	0:281d6ff68967	879	u_short cishort; /* Parsed short value */
hexley	0:281d6ff68967	880	u32_t tl, ciaddr1; /* Parsed address values */
hexley	0:281d6ff68967	881	#ifdef OLD_CI_ADDRS
hexley	0:281d6ff68967	882	u32_t ciaddr2; /* Parsed address values */
hexley	0:281d6ff68967	883	#endif
hexley	0:281d6ff68967	884	int rc = CONFACK; /* Final packet return code */
hexley	0:281d6ff68967	885	int orc; /* Individual option return code */
hexley	0:281d6ff68967	886	u_char p; / Pointer to next char to parse */
hexley	0:281d6ff68967	887	u_char ucp = inp; / Pointer to current output char */
hexley	0:281d6ff68967	888	int l = len; / Length left */
hexley	0:281d6ff68967	889	u_char maxslotindex, cflag;
hexley	0:281d6ff68967	890	int d;
hexley	0:281d6ff68967	891
hexley	0:281d6ff68967	892	cis_received[f->unit] = 1;
hexley	0:281d6ff68967	893
hexley	0:281d6ff68967	894	/*
hexley	0:281d6ff68967	895	* Reset all his options.
hexley	0:281d6ff68967	896	*/
hexley	0:281d6ff68967	897	BZERO(ho, sizeof(*ho));
hexley	0:281d6ff68967	898
hexley	0:281d6ff68967	899	/*
hexley	0:281d6ff68967	900	* Process all his options.
hexley	0:281d6ff68967	901	*/
hexley	0:281d6ff68967	902	next = inp;
hexley	0:281d6ff68967	903	while (l) {
hexley	0:281d6ff68967	904	orc = CONFACK; /* Assume success */
hexley	0:281d6ff68967	905	cip = p = next; /* Remember begining of CI */
hexley	0:281d6ff68967	906	if (l < 2 \|\| /* Not enough data for CI header or */
hexley	0:281d6ff68967	907	p[1] < 2 \|\| /* CI length too small or */
hexley	0:281d6ff68967	908	p[1] > l) { /* CI length too big? */
hexley	0:281d6ff68967	909	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
hexley	0:281d6ff68967	910	orc = CONFREJ; /* Reject bad CI */
hexley	0:281d6ff68967	911	cilen = (u_short)l;/* Reject till end of packet */
hexley	0:281d6ff68967	912	l = 0; /* Don't loop again */
hexley	0:281d6ff68967	913	goto endswitch;
hexley	0:281d6ff68967	914	}
hexley	0:281d6ff68967	915	GETCHAR(citype, p); /* Parse CI type */
hexley	0:281d6ff68967	916	GETCHAR(cilen, p); /* Parse CI length */
hexley	0:281d6ff68967	917	l -= cilen; /* Adjust remaining length */
hexley	0:281d6ff68967	918	next += cilen; /* Step to next CI */
hexley	0:281d6ff68967	919
hexley	0:281d6ff68967	920	switch (citype) { /* Check CI type */
hexley	0:281d6ff68967	921	#ifdef OLD_CI_ADDRS /* Need to save space... */
hexley	0:281d6ff68967	922	case CI_ADDRS:
hexley	0:281d6ff68967	923	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
hexley	0:281d6ff68967	924	if (!ao->neg_addr \|\|
hexley	0:281d6ff68967	925	cilen != CILEN_ADDRS) { /* Check CI length */
hexley	0:281d6ff68967	926	orc = CONFREJ; /* Reject CI */
hexley	0:281d6ff68967	927	break;
hexley	0:281d6ff68967	928	}
hexley	0:281d6ff68967	929
hexley	0:281d6ff68967	930	/*
hexley	0:281d6ff68967	931	* If he has no address, or if we both have his address but
hexley	0:281d6ff68967	932	* disagree about it, then NAK it with our idea.
hexley	0:281d6ff68967	933	* In particular, if we don't know his address, but he does,
hexley	0:281d6ff68967	934	* then accept it.
hexley	0:281d6ff68967	935	*/
hexley	0:281d6ff68967	936	GETLONG(tl, p); /* Parse source address (his) */
hexley	0:281d6ff68967	937	ciaddr1 = htonl(tl);
hexley	0:281d6ff68967	938	IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
hexley	0:281d6ff68967	939	if (ciaddr1 != wo->hisaddr
hexley	0:281d6ff68967	940	&& (ciaddr1 == 0 \|\| !wo->accept_remote)) {
hexley	0:281d6ff68967	941	orc = CONFNAK;
hexley	0:281d6ff68967	942	if (!reject_if_disagree) {
hexley	0:281d6ff68967	943	DECPTR(sizeof(u32_t), p);
hexley	0:281d6ff68967	944	tl = ntohl(wo->hisaddr);
hexley	0:281d6ff68967	945	PUTLONG(tl, p);
hexley	0:281d6ff68967	946	}
hexley	0:281d6ff68967	947	} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
hexley	0:281d6ff68967	948	/*
hexley	0:281d6ff68967	949	* If neither we nor he knows his address, reject the option.
hexley	0:281d6ff68967	950	*/
hexley	0:281d6ff68967	951	orc = CONFREJ;
hexley	0:281d6ff68967	952	wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
hexley	0:281d6ff68967	953	break;
hexley	0:281d6ff68967	954	}
hexley	0:281d6ff68967	955
hexley	0:281d6ff68967	956	/*
hexley	0:281d6ff68967	957	* If he doesn't know our address, or if we both have our address
hexley	0:281d6ff68967	958	* but disagree about it, then NAK it with our idea.
hexley	0:281d6ff68967	959	*/
hexley	0:281d6ff68967	960	GETLONG(tl, p); /* Parse desination address (ours) */
hexley	0:281d6ff68967	961	ciaddr2 = htonl(tl);
hexley	0:281d6ff68967	962	IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
hexley	0:281d6ff68967	963	if (ciaddr2 != wo->ouraddr) {
hexley	0:281d6ff68967	964	if (ciaddr2 == 0 \|\| !wo->accept_local) {
hexley	0:281d6ff68967	965	orc = CONFNAK;
hexley	0:281d6ff68967	966	if (!reject_if_disagree) {
hexley	0:281d6ff68967	967	DECPTR(sizeof(u32_t), p);
hexley	0:281d6ff68967	968	tl = ntohl(wo->ouraddr);
hexley	0:281d6ff68967	969	PUTLONG(tl, p);
hexley	0:281d6ff68967	970	}
hexley	0:281d6ff68967	971	} else {
hexley	0:281d6ff68967	972	go->ouraddr = ciaddr2; /* accept peer's idea */
hexley	0:281d6ff68967	973	}
hexley	0:281d6ff68967	974	}
hexley	0:281d6ff68967	975
hexley	0:281d6ff68967	976	ho->neg_addr = 1;
hexley	0:281d6ff68967	977	ho->old_addrs = 1;
hexley	0:281d6ff68967	978	ho->hisaddr = ciaddr1;
hexley	0:281d6ff68967	979	ho->ouraddr = ciaddr2;
hexley	0:281d6ff68967	980	break;
hexley	0:281d6ff68967	981	#endif
hexley	0:281d6ff68967	982
hexley	0:281d6ff68967	983	case CI_ADDR:
hexley	0:281d6ff68967	984	if (!ao->neg_addr) {
hexley	0:281d6ff68967	985	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
hexley	0:281d6ff68967	986	orc = CONFREJ; /* Reject CI */
hexley	0:281d6ff68967	987	break;
hexley	0:281d6ff68967	988	} else if (cilen != CILEN_ADDR) { /* Check CI length */
hexley	0:281d6ff68967	989	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
hexley	0:281d6ff68967	990	orc = CONFREJ; /* Reject CI */
hexley	0:281d6ff68967	991	break;
hexley	0:281d6ff68967	992	}
hexley	0:281d6ff68967	993
hexley	0:281d6ff68967	994	/*
hexley	0:281d6ff68967	995	* If he has no address, or if we both have his address but
hexley	0:281d6ff68967	996	* disagree about it, then NAK it with our idea.
hexley	0:281d6ff68967	997	* In particular, if we don't know his address, but he does,
hexley	0:281d6ff68967	998	* then accept it.
hexley	0:281d6ff68967	999	*/
hexley	0:281d6ff68967	1000	GETLONG(tl, p); /* Parse source address (his) */
hexley	0:281d6ff68967	1001	ciaddr1 = htonl(tl);
hexley	0:281d6ff68967	1002	if (ciaddr1 != wo->hisaddr
hexley	0:281d6ff68967	1003	&& (ciaddr1 == 0 \|\| !wo->accept_remote)) {
hexley	0:281d6ff68967	1004	orc = CONFNAK;
hexley	0:281d6ff68967	1005	if (!reject_if_disagree) {
hexley	0:281d6ff68967	1006	DECPTR(sizeof(u32_t), p);
hexley	0:281d6ff68967	1007	tl = ntohl(wo->hisaddr);
hexley	0:281d6ff68967	1008	PUTLONG(tl, p);
hexley	0:281d6ff68967	1009	}
hexley	0:281d6ff68967	1010	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
hexley	0:281d6ff68967	1011	} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
hexley	0:281d6ff68967	1012	/*
hexley	0:281d6ff68967	1013	* Don't ACK an address of 0.0.0.0 - reject it instead.
hexley	0:281d6ff68967	1014	*/
hexley	0:281d6ff68967	1015	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
hexley	0:281d6ff68967	1016	orc = CONFREJ;
hexley	0:281d6ff68967	1017	wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
hexley	0:281d6ff68967	1018	break;
hexley	0:281d6ff68967	1019	}
hexley	0:281d6ff68967	1020
hexley	0:281d6ff68967	1021	ho->neg_addr = 1;
hexley	0:281d6ff68967	1022	ho->hisaddr = ciaddr1;
hexley	0:281d6ff68967	1023	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
hexley	0:281d6ff68967	1024	break;
hexley	0:281d6ff68967	1025
hexley	0:281d6ff68967	1026	case CI_MS_DNS1:
hexley	0:281d6ff68967	1027	case CI_MS_DNS2:
hexley	0:281d6ff68967	1028	/* Microsoft primary or secondary DNS request */
hexley	0:281d6ff68967	1029	d = citype == CI_MS_DNS2;
hexley	0:281d6ff68967	1030
hexley	0:281d6ff68967	1031	/* If we do not have a DNS address then we cannot send it */
hexley	0:281d6ff68967	1032	if (ao->dnsaddr[d] == 0 \|\|
hexley	0:281d6ff68967	1033	cilen != CILEN_ADDR) { /* Check CI length */
hexley	0:281d6ff68967	1034	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
hexley	0:281d6ff68967	1035	orc = CONFREJ; /* Reject CI */
hexley	0:281d6ff68967	1036	break;
hexley	0:281d6ff68967	1037	}
hexley	0:281d6ff68967	1038	GETLONG(tl, p);
hexley	0:281d6ff68967	1039	if (htonl(tl) != ao->dnsaddr[d]) {
hexley	0:281d6ff68967	1040	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
hexley	0:281d6ff68967	1041	d+1, inet_ntoa(tl)));
hexley	0:281d6ff68967	1042	DECPTR(sizeof(u32_t), p);
hexley	0:281d6ff68967	1043	tl = ntohl(ao->dnsaddr[d]);
hexley	0:281d6ff68967	1044	PUTLONG(tl, p);
hexley	0:281d6ff68967	1045	orc = CONFNAK;
hexley	0:281d6ff68967	1046	}
hexley	0:281d6ff68967	1047	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
hexley	0:281d6ff68967	1048	break;
hexley	0:281d6ff68967	1049
hexley	0:281d6ff68967	1050	case CI_MS_WINS1:
hexley	0:281d6ff68967	1051	case CI_MS_WINS2:
hexley	0:281d6ff68967	1052	/* Microsoft primary or secondary WINS request */
hexley	0:281d6ff68967	1053	d = citype == CI_MS_WINS2;
hexley	0:281d6ff68967	1054	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
hexley	0:281d6ff68967	1055
hexley	0:281d6ff68967	1056	/* If we do not have a DNS address then we cannot send it */
hexley	0:281d6ff68967	1057	if (ao->winsaddr[d] == 0 \|\|
hexley	0:281d6ff68967	1058	cilen != CILEN_ADDR) { /* Check CI length */
hexley	0:281d6ff68967	1059	orc = CONFREJ; /* Reject CI */
hexley	0:281d6ff68967	1060	break;
hexley	0:281d6ff68967	1061	}
hexley	0:281d6ff68967	1062	GETLONG(tl, p);
hexley	0:281d6ff68967	1063	if (htonl(tl) != ao->winsaddr[d]) {
hexley	0:281d6ff68967	1064	DECPTR(sizeof(u32_t), p);
hexley	0:281d6ff68967	1065	tl = ntohl(ao->winsaddr[d]);
hexley	0:281d6ff68967	1066	PUTLONG(tl, p);
hexley	0:281d6ff68967	1067	orc = CONFNAK;
hexley	0:281d6ff68967	1068	}
hexley	0:281d6ff68967	1069	break;
hexley	0:281d6ff68967	1070
hexley	0:281d6ff68967	1071	case CI_COMPRESSTYPE:
hexley	0:281d6ff68967	1072	if (!ao->neg_vj) {
hexley	0:281d6ff68967	1073	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
hexley	0:281d6ff68967	1074	orc = CONFREJ;
hexley	0:281d6ff68967	1075	break;
hexley	0:281d6ff68967	1076	} else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
hexley	0:281d6ff68967	1077	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
hexley	0:281d6ff68967	1078	orc = CONFREJ;
hexley	0:281d6ff68967	1079	break;
hexley	0:281d6ff68967	1080	}
hexley	0:281d6ff68967	1081	GETSHORT(cishort, p);
hexley	0:281d6ff68967	1082
hexley	0:281d6ff68967	1083	if (!(cishort == IPCP_VJ_COMP \|\|
hexley	0:281d6ff68967	1084	(cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
hexley	0:281d6ff68967	1085	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
hexley	0:281d6ff68967	1086	orc = CONFREJ;
hexley	0:281d6ff68967	1087	break;
hexley	0:281d6ff68967	1088	}
hexley	0:281d6ff68967	1089
hexley	0:281d6ff68967	1090	ho->neg_vj = 1;
hexley	0:281d6ff68967	1091	ho->vj_protocol = cishort;
hexley	0:281d6ff68967	1092	if (cilen == CILEN_VJ) {
hexley	0:281d6ff68967	1093	GETCHAR(maxslotindex, p);
hexley	0:281d6ff68967	1094	if (maxslotindex > ao->maxslotindex) {
hexley	0:281d6ff68967	1095	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
hexley	0:281d6ff68967	1096	orc = CONFNAK;
hexley	0:281d6ff68967	1097	if (!reject_if_disagree) {
hexley	0:281d6ff68967	1098	DECPTR(1, p);
hexley	0:281d6ff68967	1099	PUTCHAR(ao->maxslotindex, p);
hexley	0:281d6ff68967	1100	}
hexley	0:281d6ff68967	1101	}
hexley	0:281d6ff68967	1102	GETCHAR(cflag, p);
hexley	0:281d6ff68967	1103	if (cflag && !ao->cflag) {
hexley	0:281d6ff68967	1104	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
hexley	0:281d6ff68967	1105	orc = CONFNAK;
hexley	0:281d6ff68967	1106	if (!reject_if_disagree) {
hexley	0:281d6ff68967	1107	DECPTR(1, p);
hexley	0:281d6ff68967	1108	PUTCHAR(wo->cflag, p);
hexley	0:281d6ff68967	1109	}
hexley	0:281d6ff68967	1110	}
hexley	0:281d6ff68967	1111	ho->maxslotindex = maxslotindex;
hexley	0:281d6ff68967	1112	ho->cflag = cflag;
hexley	0:281d6ff68967	1113	} else {
hexley	0:281d6ff68967	1114	ho->old_vj = 1;
hexley	0:281d6ff68967	1115	ho->maxslotindex = MAX_SLOTS - 1;
hexley	0:281d6ff68967	1116	ho->cflag = 1;
hexley	0:281d6ff68967	1117	}
hexley	0:281d6ff68967	1118	IPCPDEBUG(LOG_INFO, (
hexley	0:281d6ff68967	1119	"ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
hexley	0:281d6ff68967	1120	ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
hexley	0:281d6ff68967	1121	break;
hexley	0:281d6ff68967	1122
hexley	0:281d6ff68967	1123	default:
hexley	0:281d6ff68967	1124	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
hexley	0:281d6ff68967	1125	orc = CONFREJ;
hexley	0:281d6ff68967	1126	break;
hexley	0:281d6ff68967	1127	}
hexley	0:281d6ff68967	1128
hexley	0:281d6ff68967	1129	endswitch:
hexley	0:281d6ff68967	1130	if (orc == CONFACK && /* Good CI */
hexley	0:281d6ff68967	1131	rc != CONFACK) { /* but prior CI wasnt? */
hexley	0:281d6ff68967	1132	continue; /* Don't send this one */
hexley	0:281d6ff68967	1133	}
hexley	0:281d6ff68967	1134
hexley	0:281d6ff68967	1135	if (orc == CONFNAK) { /* Nak this CI? */
hexley	0:281d6ff68967	1136	if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
hexley	0:281d6ff68967	1137	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
hexley	0:281d6ff68967	1138	orc = CONFREJ; /* Get tough if so */
hexley	0:281d6ff68967	1139	} else {
hexley	0:281d6ff68967	1140	if (rc == CONFREJ) { /* Rejecting prior CI? */
hexley	0:281d6ff68967	1141	continue; /* Don't send this one */
hexley	0:281d6ff68967	1142	}
hexley	0:281d6ff68967	1143	if (rc == CONFACK) { /* Ack'd all prior CIs? */
hexley	0:281d6ff68967	1144	rc = CONFNAK; /* Not anymore... */
hexley	0:281d6ff68967	1145	ucp = inp; /* Backup */
hexley	0:281d6ff68967	1146	}
hexley	0:281d6ff68967	1147	}
hexley	0:281d6ff68967	1148	}
hexley	0:281d6ff68967	1149
hexley	0:281d6ff68967	1150	if (orc == CONFREJ && /* Reject this CI */
hexley	0:281d6ff68967	1151	rc != CONFREJ) { /* but no prior ones? */
hexley	0:281d6ff68967	1152	rc = CONFREJ;
hexley	0:281d6ff68967	1153	ucp = inp; /* Backup */
hexley	0:281d6ff68967	1154	}
hexley	0:281d6ff68967	1155
hexley	0:281d6ff68967	1156	/* Need to move CI? */
hexley	0:281d6ff68967	1157	if (ucp != cip) {
hexley	0:281d6ff68967	1158	BCOPY(cip, ucp, cilen); /* Move it */
hexley	0:281d6ff68967	1159	}
hexley	0:281d6ff68967	1160
hexley	0:281d6ff68967	1161	/* Update output pointer */
hexley	0:281d6ff68967	1162	INCPTR(cilen, ucp);
hexley	0:281d6ff68967	1163	}
hexley	0:281d6ff68967	1164
hexley	0:281d6ff68967	1165	/*
hexley	0:281d6ff68967	1166	* If we aren't rejecting this packet, and we want to negotiate
hexley	0:281d6ff68967	1167	* their address, and they didn't send their address, then we
hexley	0:281d6ff68967	1168	* send a NAK with a CI_ADDR option appended. We assume the
hexley	0:281d6ff68967	1169	* input buffer is long enough that we can append the extra
hexley	0:281d6ff68967	1170	* option safely.
hexley	0:281d6ff68967	1171	*/
hexley	0:281d6ff68967	1172	if (rc != CONFREJ && !ho->neg_addr &&
hexley	0:281d6ff68967	1173	wo->req_addr && !reject_if_disagree) {
hexley	0:281d6ff68967	1174	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
hexley	0:281d6ff68967	1175	if (rc == CONFACK) {
hexley	0:281d6ff68967	1176	rc = CONFNAK;
hexley	0:281d6ff68967	1177	ucp = inp; /* reset pointer */
hexley	0:281d6ff68967	1178	wo->req_addr = 0; /* don't ask again */
hexley	0:281d6ff68967	1179	}
hexley	0:281d6ff68967	1180	PUTCHAR(CI_ADDR, ucp);
hexley	0:281d6ff68967	1181	PUTCHAR(CILEN_ADDR, ucp);
hexley	0:281d6ff68967	1182	tl = ntohl(wo->hisaddr);
hexley	0:281d6ff68967	1183	PUTLONG(tl, ucp);
hexley	0:281d6ff68967	1184	}
hexley	0:281d6ff68967	1185
hexley	0:281d6ff68967	1186	len = (int)(ucp - inp); / Compute output length */
hexley	0:281d6ff68967	1187	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
hexley	0:281d6ff68967	1188	return (rc); /* Return final code */
hexley	0:281d6ff68967	1189	}
hexley	0:281d6ff68967	1190
hexley	0:281d6ff68967	1191
hexley	0:281d6ff68967	1192	#if 0
hexley	0:281d6ff68967	1193	/*
hexley	0:281d6ff68967	1194	* ip_check_options - check that any IP-related options are OK,
hexley	0:281d6ff68967	1195	* and assign appropriate defaults.
hexley	0:281d6ff68967	1196	*/
hexley	0:281d6ff68967	1197	static void
hexley	0:281d6ff68967	1198	ip_check_options(u_long localAddr)
hexley	0:281d6ff68967	1199	{
hexley	0:281d6ff68967	1200	ipcp_options *wo = &ipcp_wantoptions[0];
hexley	0:281d6ff68967	1201
hexley	0:281d6ff68967	1202	/*
hexley	0:281d6ff68967	1203	* Load our default IP address but allow the remote host to give us
hexley	0:281d6ff68967	1204	* a new address.
hexley	0:281d6ff68967	1205	*/
hexley	0:281d6ff68967	1206	if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
hexley	0:281d6ff68967	1207	wo->accept_local = 1; /* don't insist on this default value */
hexley	0:281d6ff68967	1208	wo->ouraddr = htonl(localAddr);
hexley	0:281d6ff68967	1209	}
hexley	0:281d6ff68967	1210	}
hexley	0:281d6ff68967	1211	#endif
hexley	0:281d6ff68967	1212
hexley	0:281d6ff68967	1213
hexley	0:281d6ff68967	1214	/*
hexley	0:281d6ff68967	1215	* ipcp_up - IPCP has come UP.
hexley	0:281d6ff68967	1216	*
hexley	0:281d6ff68967	1217	* Configure the IP network interface appropriately and bring it up.
hexley	0:281d6ff68967	1218	*/
hexley	0:281d6ff68967	1219	static void
hexley	0:281d6ff68967	1220	ipcp_up(fsm *f)
hexley	0:281d6ff68967	1221	{
hexley	0:281d6ff68967	1222	u32_t mask;
hexley	0:281d6ff68967	1223	ipcp_options *ho = &ipcp_hisoptions[f->unit];
hexley	0:281d6ff68967	1224	ipcp_options *go = &ipcp_gotoptions[f->unit];
hexley	0:281d6ff68967	1225	ipcp_options *wo = &ipcp_wantoptions[f->unit];
hexley	0:281d6ff68967	1226
hexley	0:281d6ff68967	1227	np_up(f->unit, PPP_IP);
hexley	0:281d6ff68967	1228	IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
hexley	0:281d6ff68967	1229
hexley	0:281d6ff68967	1230	/*
hexley	0:281d6ff68967	1231	* We must have a non-zero IP address for both ends of the link.
hexley	0:281d6ff68967	1232	*/
hexley	0:281d6ff68967	1233	if (!ho->neg_addr) {
hexley	0:281d6ff68967	1234	ho->hisaddr = wo->hisaddr;
hexley	0:281d6ff68967	1235	}
hexley	0:281d6ff68967	1236	#ifdef __PPP_STRICT_IMPL__ //DG : Kludge for bad 3g providers PPP impl
hexley	0:281d6ff68967	1237	if (ho->hisaddr == 0) {
hexley	0:281d6ff68967	1238	IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
hexley	0:281d6ff68967	1239	ipcp_close(f->unit, "Could not determine remote IP address");
hexley	0:281d6ff68967	1240	return;
hexley	0:281d6ff68967	1241	}
hexley	0:281d6ff68967	1242	#endif
hexley	0:281d6ff68967	1243	if (go->ouraddr == 0) {
hexley	0:281d6ff68967	1244	IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
hexley	0:281d6ff68967	1245	ipcp_close(f->unit, "Could not determine local IP address");
hexley	0:281d6ff68967	1246	return;
hexley	0:281d6ff68967	1247	}
hexley	0:281d6ff68967	1248
hexley	0:281d6ff68967	1249	if (ppp_settings.usepeerdns && (go->dnsaddr[0] \|\| go->dnsaddr[1])) {
hexley	0:281d6ff68967	1250	/pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);/
hexley	0:281d6ff68967	1251	}
hexley	0:281d6ff68967	1252
hexley	0:281d6ff68967	1253	/*
hexley	0:281d6ff68967	1254	* Check that the peer is allowed to use the IP address it wants.
hexley	0:281d6ff68967	1255	*/
hexley	0:281d6ff68967	1256	if (!auth_ip_addr(f->unit, ho->hisaddr)) {
hexley	0:281d6ff68967	1257	IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
hexley	0:281d6ff68967	1258	inet_ntoa(ho->hisaddr)));
hexley	0:281d6ff68967	1259	ipcp_close(f->unit, "Unauthorized remote IP address");
hexley	0:281d6ff68967	1260	return;
hexley	0:281d6ff68967	1261	}
hexley	0:281d6ff68967	1262
hexley	0:281d6ff68967	1263	/* set tcp compression */
hexley	0:281d6ff68967	1264	sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
hexley	0:281d6ff68967	1265
hexley	0:281d6ff68967	1266	/*
hexley	0:281d6ff68967	1267	* Set IP addresses and (if specified) netmask.
hexley	0:281d6ff68967	1268	*/
hexley	0:281d6ff68967	1269	mask = GetMask(go->ouraddr);
hexley	0:281d6ff68967	1270
hexley	0:281d6ff68967	1271	if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
hexley	0:281d6ff68967	1272	IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
hexley	0:281d6ff68967	1273	ipcp_close(f->unit, "Interface configuration failed");
hexley	0:281d6ff68967	1274	return;
hexley	0:281d6ff68967	1275	}
hexley	0:281d6ff68967	1276
hexley	0:281d6ff68967	1277	/* bring the interface up for IP */
hexley	0:281d6ff68967	1278	if (!sifup(f->unit)) {
hexley	0:281d6ff68967	1279	IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
hexley	0:281d6ff68967	1280	ipcp_close(f->unit, "Interface configuration failed");
hexley	0:281d6ff68967	1281	return;
hexley	0:281d6ff68967	1282	}
hexley	0:281d6ff68967	1283
hexley	0:281d6ff68967	1284	sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
hexley	0:281d6ff68967	1285
hexley	0:281d6ff68967	1286	/* assign a default route through the interface if required */
hexley	0:281d6ff68967	1287	if (ipcp_wantoptions[f->unit].default_route) {
hexley	0:281d6ff68967	1288	if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
hexley	0:281d6ff68967	1289	default_route_set[f->unit] = 1;
hexley	0:281d6ff68967	1290	}
hexley	0:281d6ff68967	1291	}
hexley	0:281d6ff68967	1292
hexley	0:281d6ff68967	1293	IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
hexley	0:281d6ff68967	1294	IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
hexley	0:281d6ff68967	1295	if (go->dnsaddr[0]) {
hexley	0:281d6ff68967	1296	IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
hexley	0:281d6ff68967	1297	}
hexley	0:281d6ff68967	1298	if (go->dnsaddr[1]) {
hexley	0:281d6ff68967	1299	IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
hexley	0:281d6ff68967	1300	}
hexley	0:281d6ff68967	1301	}
hexley	0:281d6ff68967	1302
hexley	0:281d6ff68967	1303
hexley	0:281d6ff68967	1304	/*
hexley	0:281d6ff68967	1305	* ipcp_down - IPCP has gone DOWN.
hexley	0:281d6ff68967	1306	*
hexley	0:281d6ff68967	1307	* Take the IP network interface down, clear its addresses
hexley	0:281d6ff68967	1308	* and delete routes through it.
hexley	0:281d6ff68967	1309	*/
hexley	0:281d6ff68967	1310	static void
hexley	0:281d6ff68967	1311	ipcp_down(fsm *f)
hexley	0:281d6ff68967	1312	{
hexley	0:281d6ff68967	1313	IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
hexley	0:281d6ff68967	1314	np_down(f->unit, PPP_IP);
hexley	0:281d6ff68967	1315	sifvjcomp(f->unit, 0, 0, 0);
hexley	0:281d6ff68967	1316
hexley	0:281d6ff68967	1317	sifdown(f->unit);
hexley	0:281d6ff68967	1318	ipcp_clear_addrs(f->unit);
hexley	0:281d6ff68967	1319	}
hexley	0:281d6ff68967	1320
hexley	0:281d6ff68967	1321
hexley	0:281d6ff68967	1322	/*
hexley	0:281d6ff68967	1323	* ipcp_clear_addrs() - clear the interface addresses, routes, etc.
hexley	0:281d6ff68967	1324	*/
hexley	0:281d6ff68967	1325	static void
hexley	0:281d6ff68967	1326	ipcp_clear_addrs(int unit)
hexley	0:281d6ff68967	1327	{
hexley	0:281d6ff68967	1328	u32_t ouraddr, hisaddr;
hexley	0:281d6ff68967	1329
hexley	0:281d6ff68967	1330	ouraddr = ipcp_gotoptions[unit].ouraddr;
hexley	0:281d6ff68967	1331	hisaddr = ipcp_hisoptions[unit].hisaddr;
hexley	0:281d6ff68967	1332	if (default_route_set[unit]) {
hexley	0:281d6ff68967	1333	cifdefaultroute(unit, ouraddr, hisaddr);
hexley	0:281d6ff68967	1334	default_route_set[unit] = 0;
hexley	0:281d6ff68967	1335	}
hexley	0:281d6ff68967	1336	cifaddr(unit, ouraddr, hisaddr);
hexley	0:281d6ff68967	1337	}
hexley	0:281d6ff68967	1338
hexley	0:281d6ff68967	1339
hexley	0:281d6ff68967	1340	/*
hexley	0:281d6ff68967	1341	* ipcp_finished - possibly shut down the lower layers.
hexley	0:281d6ff68967	1342	*/
hexley	0:281d6ff68967	1343	static void
hexley	0:281d6ff68967	1344	ipcp_finished(fsm *f)
hexley	0:281d6ff68967	1345	{
hexley	0:281d6ff68967	1346	np_finished(f->unit, PPP_IP);
hexley	0:281d6ff68967	1347	}
hexley	0:281d6ff68967	1348
hexley	0:281d6ff68967	1349	#if PPP_ADDITIONAL_CALLBACKS
hexley	0:281d6ff68967	1350	static int
hexley	0:281d6ff68967	1351	ipcp_printpkt(u_char p, int plen, void (printer) (void , char , ...), void *arg)
hexley	0:281d6ff68967	1352	{
hexley	0:281d6ff68967	1353	LWIP_UNUSED_ARG(p);
hexley	0:281d6ff68967	1354	LWIP_UNUSED_ARG(plen);
hexley	0:281d6ff68967	1355	LWIP_UNUSED_ARG(printer);
hexley	0:281d6ff68967	1356	LWIP_UNUSED_ARG(arg);
hexley	0:281d6ff68967	1357	return 0;
hexley	0:281d6ff68967	1358	}
hexley	0:281d6ff68967	1359
hexley	0:281d6ff68967	1360	/*
hexley	0:281d6ff68967	1361	* ip_active_pkt - see if this IP packet is worth bringing the link up for.
hexley	0:281d6ff68967	1362	* We don't bring the link up for IP fragments or for TCP FIN packets
hexley	0:281d6ff68967	1363	* with no data.
hexley	0:281d6ff68967	1364	*/
hexley	0:281d6ff68967	1365	#define IP_HDRLEN 20 /* bytes */
hexley	0:281d6ff68967	1366	#define IP_OFFMASK 0x1fff
hexley	0:281d6ff68967	1367	#define IPPROTO_TCP 6
hexley	0:281d6ff68967	1368	#define TCP_HDRLEN 20
hexley	0:281d6ff68967	1369	#define TH_FIN 0x01
hexley	0:281d6ff68967	1370
hexley	0:281d6ff68967	1371	/*
hexley	0:281d6ff68967	1372	* We use these macros because the IP header may be at an odd address,
hexley	0:281d6ff68967	1373	* and some compilers might use word loads to get th_off or ip_hl.
hexley	0:281d6ff68967	1374	*/
hexley	0:281d6ff68967	1375
hexley	0:281d6ff68967	1376	#define net_short(x) (((x)[0] << 8) + (x)[1])
hexley	0:281d6ff68967	1377	#define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
hexley	0:281d6ff68967	1378	#define get_ipoff(x) net_short((unsigned char *)(x) + 6)
hexley	0:281d6ff68967	1379	#define get_ipproto(x) (((unsigned char *)(x))[9])
hexley	0:281d6ff68967	1380	#define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
hexley	0:281d6ff68967	1381	#define get_tcpflags(x) (((unsigned char *)(x))[13])
hexley	0:281d6ff68967	1382
hexley	0:281d6ff68967	1383	static int
hexley	0:281d6ff68967	1384	ip_active_pkt(u_char *pkt, int len)
hexley	0:281d6ff68967	1385	{
hexley	0:281d6ff68967	1386	u_char *tcp;
hexley	0:281d6ff68967	1387	int hlen;
hexley	0:281d6ff68967	1388
hexley	0:281d6ff68967	1389	len -= PPP_HDRLEN;
hexley	0:281d6ff68967	1390	pkt += PPP_HDRLEN;
hexley	0:281d6ff68967	1391	if (len < IP_HDRLEN) {
hexley	0:281d6ff68967	1392	return 0;
hexley	0:281d6ff68967	1393	}
hexley	0:281d6ff68967	1394	if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
hexley	0:281d6ff68967	1395	return 0;
hexley	0:281d6ff68967	1396	}
hexley	0:281d6ff68967	1397	if (get_ipproto(pkt) != IPPROTO_TCP) {
hexley	0:281d6ff68967	1398	return 1;
hexley	0:281d6ff68967	1399	}
hexley	0:281d6ff68967	1400	hlen = get_iphl(pkt) * 4;
hexley	0:281d6ff68967	1401	if (len < hlen + TCP_HDRLEN) {
hexley	0:281d6ff68967	1402	return 0;
hexley	0:281d6ff68967	1403	}
hexley	0:281d6ff68967	1404	tcp = pkt + hlen;
hexley	0:281d6ff68967	1405	if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
hexley	0:281d6ff68967	1406	return 0;
hexley	0:281d6ff68967	1407	}
hexley	0:281d6ff68967	1408	return 1;
hexley	0:281d6ff68967	1409	}
hexley	0:281d6ff68967	1410	#endif /* PPP_ADDITIONAL_CALLBACKS */
hexley	0:281d6ff68967	1411
hexley	0:281d6ff68967	1412	#endif /* PPP_SUPPORT */

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Type:	Library
Created:	19 Nov 2010
Imports:	44
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	1

lwip/netif/ppp/ipcp.c@0:281d6ff68967, 2010-11-19 (annotated)

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