StrippedDownNetServices - This library is stripped down version of NetServi…

Users » idinor » Code » StrippedDownNetServices

idinor Launcher / StrippedDownNetServices

This library is stripped down version of NetServices library. HTTP server and client function is NOT supported.

lwip/netif/ppp/ipcp.c@0:dcf3c92487ca, 2011-07-20 (annotated)

Committer:: idinor
Date:: Wed Jul 20 11:45:39 2011 +0000
Revision:: 0:dcf3c92487ca

Who changed what in which revision?

User	Revision	Line number	New contents of line
idinor	0:dcf3c92487ca	1	/** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
idinor	0:dcf3c92487ca	2	dial-on-demand has been stripped. */
idinor	0:dcf3c92487ca	3	/*****************************************************************************
idinor	0:dcf3c92487ca	4	* ipcp.c - Network PPP IP Control Protocol program file.
idinor	0:dcf3c92487ca	5	*
idinor	0:dcf3c92487ca	6	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
idinor	0:dcf3c92487ca	7	* portions Copyright (c) 1997 by Global Election Systems Inc.
idinor	0:dcf3c92487ca	8	*
idinor	0:dcf3c92487ca	9	* The authors hereby grant permission to use, copy, modify, distribute,
idinor	0:dcf3c92487ca	10	* and license this software and its documentation for any purpose, provided
idinor	0:dcf3c92487ca	11	* that existing copyright notices are retained in all copies and that this
idinor	0:dcf3c92487ca	12	* notice and the following disclaimer are included verbatim in any
idinor	0:dcf3c92487ca	13	* distributions. No written agreement, license, or royalty fee is required
idinor	0:dcf3c92487ca	14	* for any of the authorized uses.
idinor	0:dcf3c92487ca	15	*
idinor	0:dcf3c92487ca	16	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
idinor	0:dcf3c92487ca	17	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
idinor	0:dcf3c92487ca	18	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
idinor	0:dcf3c92487ca	19	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
idinor	0:dcf3c92487ca	20	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
idinor	0:dcf3c92487ca	21	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
idinor	0:dcf3c92487ca	22	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
idinor	0:dcf3c92487ca	23	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
idinor	0:dcf3c92487ca	24	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
idinor	0:dcf3c92487ca	25	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
idinor	0:dcf3c92487ca	26	*
idinor	0:dcf3c92487ca	27	******************************************************************************
idinor	0:dcf3c92487ca	28	* REVISION HISTORY
idinor	0:dcf3c92487ca	29	*
idinor	0:dcf3c92487ca	30	* 03-01-01 Marc Boucher <marc@mbsi.ca>
idinor	0:dcf3c92487ca	31	* Ported to lwIP.
idinor	0:dcf3c92487ca	32	* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
idinor	0:dcf3c92487ca	33	* Original.
idinor	0:dcf3c92487ca	34	*****************************************************************************/
idinor	0:dcf3c92487ca	35	/*
idinor	0:dcf3c92487ca	36	* ipcp.c - PPP IP Control Protocol.
idinor	0:dcf3c92487ca	37	*
idinor	0:dcf3c92487ca	38	* Copyright (c) 1989 Carnegie Mellon University.
idinor	0:dcf3c92487ca	39	* All rights reserved.
idinor	0:dcf3c92487ca	40	*
idinor	0:dcf3c92487ca	41	* Redistribution and use in source and binary forms are permitted
idinor	0:dcf3c92487ca	42	* provided that the above copyright notice and this paragraph are
idinor	0:dcf3c92487ca	43	* duplicated in all such forms and that any documentation,
idinor	0:dcf3c92487ca	44	* advertising materials, and other materials related to such
idinor	0:dcf3c92487ca	45	* distribution and use acknowledge that the software was developed
idinor	0:dcf3c92487ca	46	* by Carnegie Mellon University. The name of the
idinor	0:dcf3c92487ca	47	* University may not be used to endorse or promote products derived
idinor	0:dcf3c92487ca	48	* from this software without specific prior written permission.
idinor	0:dcf3c92487ca	49	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
idinor	0:dcf3c92487ca	50	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
idinor	0:dcf3c92487ca	51	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
idinor	0:dcf3c92487ca	52	*/
idinor	0:dcf3c92487ca	53
idinor	0:dcf3c92487ca	54	#include "lwip/opt.h"
idinor	0:dcf3c92487ca	55
idinor	0:dcf3c92487ca	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
idinor	0:dcf3c92487ca	57
idinor	0:dcf3c92487ca	58	#include "ppp.h"
idinor	0:dcf3c92487ca	59	#include "pppdebug.h"
idinor	0:dcf3c92487ca	60
idinor	0:dcf3c92487ca	61	#include "auth.h"
idinor	0:dcf3c92487ca	62	#include "fsm.h"
idinor	0:dcf3c92487ca	63	#include "vj.h"
idinor	0:dcf3c92487ca	64	#include "ipcp.h"
idinor	0:dcf3c92487ca	65
idinor	0:dcf3c92487ca	66	#include "lwip/inet.h"
idinor	0:dcf3c92487ca	67
idinor	0:dcf3c92487ca	68	#include <string.h>
idinor	0:dcf3c92487ca	69
idinor	0:dcf3c92487ca	70	/* #define OLD_CI_ADDRS 1 / / Support deprecated address negotiation. */
idinor	0:dcf3c92487ca	71
idinor	0:dcf3c92487ca	72	/* global vars */
idinor	0:dcf3c92487ca	73	ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
idinor	0:dcf3c92487ca	74	ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
idinor	0:dcf3c92487ca	75	ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
idinor	0:dcf3c92487ca	76	ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
idinor	0:dcf3c92487ca	77
idinor	0:dcf3c92487ca	78	/* local vars */
idinor	0:dcf3c92487ca	79	static int default_route_set[NUM_PPP]; /* Have set up a default route */
idinor	0:dcf3c92487ca	80	static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
idinor	0:dcf3c92487ca	81
idinor	0:dcf3c92487ca	82
idinor	0:dcf3c92487ca	83	/*
idinor	0:dcf3c92487ca	84	* Callbacks for fsm code. (CI = Configuration Information)
idinor	0:dcf3c92487ca	85	*/
idinor	0:dcf3c92487ca	86	static void ipcp_resetci (fsm ); / Reset our CI */
idinor	0:dcf3c92487ca	87	static int ipcp_cilen (fsm ); / Return length of our CI */
idinor	0:dcf3c92487ca	88	static void ipcp_addci (fsm , u_char , int ); / Add our CI */
idinor	0:dcf3c92487ca	89	static int ipcp_ackci (fsm , u_char , int); /* Peer ack'd our CI */
idinor	0:dcf3c92487ca	90	static int ipcp_nakci (fsm , u_char , int); /* Peer nak'd our CI */
idinor	0:dcf3c92487ca	91	static int ipcp_rejci (fsm , u_char , int); /* Peer rej'd our CI */
idinor	0:dcf3c92487ca	92	static int ipcp_reqci (fsm , u_char , int , int); / Rcv CI */
idinor	0:dcf3c92487ca	93	static void ipcp_up (fsm ); / We're UP */
idinor	0:dcf3c92487ca	94	static void ipcp_down (fsm ); / We're DOWN */
idinor	0:dcf3c92487ca	95	#if PPP_ADDITIONAL_CALLBACKS
idinor	0:dcf3c92487ca	96	static void ipcp_script (fsm , char ); /* Run an up/down script */
idinor	0:dcf3c92487ca	97	#endif
idinor	0:dcf3c92487ca	98	static void ipcp_finished (fsm ); / Don't need lower layer */
idinor	0:dcf3c92487ca	99
idinor	0:dcf3c92487ca	100
idinor	0:dcf3c92487ca	101	fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
idinor	0:dcf3c92487ca	102
idinor	0:dcf3c92487ca	103
idinor	0:dcf3c92487ca	104	static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
idinor	0:dcf3c92487ca	105	ipcp_resetci, /* Reset our Configuration Information */
idinor	0:dcf3c92487ca	106	ipcp_cilen, /* Length of our Configuration Information */
idinor	0:dcf3c92487ca	107	ipcp_addci, /* Add our Configuration Information */
idinor	0:dcf3c92487ca	108	ipcp_ackci, /* ACK our Configuration Information */
idinor	0:dcf3c92487ca	109	ipcp_nakci, /* NAK our Configuration Information */
idinor	0:dcf3c92487ca	110	ipcp_rejci, /* Reject our Configuration Information */
idinor	0:dcf3c92487ca	111	ipcp_reqci, /* Request peer's Configuration Information */
idinor	0:dcf3c92487ca	112	ipcp_up, /* Called when fsm reaches LS_OPENED state */
idinor	0:dcf3c92487ca	113	ipcp_down, /* Called when fsm leaves LS_OPENED state */
idinor	0:dcf3c92487ca	114	NULL, /* Called when we want the lower layer up */
idinor	0:dcf3c92487ca	115	ipcp_finished, /* Called when we want the lower layer down */
idinor	0:dcf3c92487ca	116	NULL, /* Called when Protocol-Reject received */
idinor	0:dcf3c92487ca	117	NULL, /* Retransmission is necessary */
idinor	0:dcf3c92487ca	118	NULL, /* Called to handle protocol-specific codes */
idinor	0:dcf3c92487ca	119	"IPCP" /* String name of protocol */
idinor	0:dcf3c92487ca	120	};
idinor	0:dcf3c92487ca	121
idinor	0:dcf3c92487ca	122	/*
idinor	0:dcf3c92487ca	123	* Protocol entry points from main code.
idinor	0:dcf3c92487ca	124	*/
idinor	0:dcf3c92487ca	125	static void ipcp_init (int);
idinor	0:dcf3c92487ca	126	static void ipcp_open (int);
idinor	0:dcf3c92487ca	127	static void ipcp_close (int, char *);
idinor	0:dcf3c92487ca	128	static void ipcp_lowerup (int);
idinor	0:dcf3c92487ca	129	static void ipcp_lowerdown (int);
idinor	0:dcf3c92487ca	130	static void ipcp_input (int, u_char *, int);
idinor	0:dcf3c92487ca	131	static void ipcp_protrej (int);
idinor	0:dcf3c92487ca	132
idinor	0:dcf3c92487ca	133
idinor	0:dcf3c92487ca	134	struct protent ipcp_protent = {
idinor	0:dcf3c92487ca	135	PPP_IPCP,
idinor	0:dcf3c92487ca	136	ipcp_init,
idinor	0:dcf3c92487ca	137	ipcp_input,
idinor	0:dcf3c92487ca	138	ipcp_protrej,
idinor	0:dcf3c92487ca	139	ipcp_lowerup,
idinor	0:dcf3c92487ca	140	ipcp_lowerdown,
idinor	0:dcf3c92487ca	141	ipcp_open,
idinor	0:dcf3c92487ca	142	ipcp_close,
idinor	0:dcf3c92487ca	143	#if PPP_ADDITIONAL_CALLBACKS
idinor	0:dcf3c92487ca	144	ipcp_printpkt,
idinor	0:dcf3c92487ca	145	NULL,
idinor	0:dcf3c92487ca	146	#endif /* PPP_ADDITIONAL_CALLBACKS */
idinor	0:dcf3c92487ca	147	1,
idinor	0:dcf3c92487ca	148	"IPCP",
idinor	0:dcf3c92487ca	149	#if PPP_ADDITIONAL_CALLBACKS
idinor	0:dcf3c92487ca	150	ip_check_options,
idinor	0:dcf3c92487ca	151	NULL,
idinor	0:dcf3c92487ca	152	ip_active_pkt
idinor	0:dcf3c92487ca	153	#endif /* PPP_ADDITIONAL_CALLBACKS */
idinor	0:dcf3c92487ca	154	};
idinor	0:dcf3c92487ca	155
idinor	0:dcf3c92487ca	156	static void ipcp_clear_addrs (int);
idinor	0:dcf3c92487ca	157
idinor	0:dcf3c92487ca	158	/*
idinor	0:dcf3c92487ca	159	* Lengths of configuration options.
idinor	0:dcf3c92487ca	160	*/
idinor	0:dcf3c92487ca	161	#define CILEN_VOID 2
idinor	0:dcf3c92487ca	162	#define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
idinor	0:dcf3c92487ca	163	#define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
idinor	0:dcf3c92487ca	164	#define CILEN_ADDR 6 /* new-style single address option */
idinor	0:dcf3c92487ca	165	#define CILEN_ADDRS 10 /* old-style dual address option */
idinor	0:dcf3c92487ca	166
idinor	0:dcf3c92487ca	167
idinor	0:dcf3c92487ca	168	#define CODENAME(x) ((x) == CONFACK ? "ACK" : \
idinor	0:dcf3c92487ca	169	(x) == CONFNAK ? "NAK" : "REJ")
idinor	0:dcf3c92487ca	170
idinor	0:dcf3c92487ca	171
idinor	0:dcf3c92487ca	172	/*
idinor	0:dcf3c92487ca	173	* ipcp_init - Initialize IPCP.
idinor	0:dcf3c92487ca	174	*/
idinor	0:dcf3c92487ca	175	static void
idinor	0:dcf3c92487ca	176	ipcp_init(int unit)
idinor	0:dcf3c92487ca	177	{
idinor	0:dcf3c92487ca	178	fsm *f = &ipcp_fsm[unit];
idinor	0:dcf3c92487ca	179	ipcp_options *wo = &ipcp_wantoptions[unit];
idinor	0:dcf3c92487ca	180	ipcp_options *ao = &ipcp_allowoptions[unit];
idinor	0:dcf3c92487ca	181
idinor	0:dcf3c92487ca	182	f->unit = unit;
idinor	0:dcf3c92487ca	183	f->protocol = PPP_IPCP;
idinor	0:dcf3c92487ca	184	f->callbacks = &ipcp_callbacks;
idinor	0:dcf3c92487ca	185	fsm_init(&ipcp_fsm[unit]);
idinor	0:dcf3c92487ca	186
idinor	0:dcf3c92487ca	187	memset(wo, 0, sizeof(*wo));
idinor	0:dcf3c92487ca	188	memset(ao, 0, sizeof(*ao));
idinor	0:dcf3c92487ca	189
idinor	0:dcf3c92487ca	190	wo->neg_addr = 1;
idinor	0:dcf3c92487ca	191	wo->ouraddr = 0;
idinor	0:dcf3c92487ca	192	#if VJ_SUPPORT
idinor	0:dcf3c92487ca	193	wo->neg_vj = 1;
idinor	0:dcf3c92487ca	194	#else /* VJ_SUPPORT */
idinor	0:dcf3c92487ca	195	wo->neg_vj = 0;
idinor	0:dcf3c92487ca	196	#endif /* VJ_SUPPORT */
idinor	0:dcf3c92487ca	197	wo->vj_protocol = IPCP_VJ_COMP;
idinor	0:dcf3c92487ca	198	wo->maxslotindex = MAX_SLOTS - 1;
idinor	0:dcf3c92487ca	199	wo->cflag = 0;
idinor	0:dcf3c92487ca	200	wo->default_route = 1;
idinor	0:dcf3c92487ca	201
idinor	0:dcf3c92487ca	202	ao->neg_addr = 1;
idinor	0:dcf3c92487ca	203	#if VJ_SUPPORT
idinor	0:dcf3c92487ca	204	ao->neg_vj = 1;
idinor	0:dcf3c92487ca	205	#else /* VJ_SUPPORT */
idinor	0:dcf3c92487ca	206	ao->neg_vj = 0;
idinor	0:dcf3c92487ca	207	#endif /* VJ_SUPPORT */
idinor	0:dcf3c92487ca	208	ao->maxslotindex = MAX_SLOTS - 1;
idinor	0:dcf3c92487ca	209	ao->cflag = 1;
idinor	0:dcf3c92487ca	210	ao->default_route = 1;
idinor	0:dcf3c92487ca	211	}
idinor	0:dcf3c92487ca	212
idinor	0:dcf3c92487ca	213
idinor	0:dcf3c92487ca	214	/*
idinor	0:dcf3c92487ca	215	* ipcp_open - IPCP is allowed to come up.
idinor	0:dcf3c92487ca	216	*/
idinor	0:dcf3c92487ca	217	static void
idinor	0:dcf3c92487ca	218	ipcp_open(int unit)
idinor	0:dcf3c92487ca	219	{
idinor	0:dcf3c92487ca	220	fsm_open(&ipcp_fsm[unit]);
idinor	0:dcf3c92487ca	221	}
idinor	0:dcf3c92487ca	222
idinor	0:dcf3c92487ca	223
idinor	0:dcf3c92487ca	224	/*
idinor	0:dcf3c92487ca	225	* ipcp_close - Take IPCP down.
idinor	0:dcf3c92487ca	226	*/
idinor	0:dcf3c92487ca	227	static void
idinor	0:dcf3c92487ca	228	ipcp_close(int unit, char *reason)
idinor	0:dcf3c92487ca	229	{
idinor	0:dcf3c92487ca	230	fsm_close(&ipcp_fsm[unit], reason);
idinor	0:dcf3c92487ca	231	}
idinor	0:dcf3c92487ca	232
idinor	0:dcf3c92487ca	233
idinor	0:dcf3c92487ca	234	/*
idinor	0:dcf3c92487ca	235	* ipcp_lowerup - The lower layer is up.
idinor	0:dcf3c92487ca	236	*/
idinor	0:dcf3c92487ca	237	static void
idinor	0:dcf3c92487ca	238	ipcp_lowerup(int unit)
idinor	0:dcf3c92487ca	239	{
idinor	0:dcf3c92487ca	240	fsm_lowerup(&ipcp_fsm[unit]);
idinor	0:dcf3c92487ca	241	}
idinor	0:dcf3c92487ca	242
idinor	0:dcf3c92487ca	243
idinor	0:dcf3c92487ca	244	/*
idinor	0:dcf3c92487ca	245	* ipcp_lowerdown - The lower layer is down.
idinor	0:dcf3c92487ca	246	*/
idinor	0:dcf3c92487ca	247	static void
idinor	0:dcf3c92487ca	248	ipcp_lowerdown(int unit)
idinor	0:dcf3c92487ca	249	{
idinor	0:dcf3c92487ca	250	fsm_lowerdown(&ipcp_fsm[unit]);
idinor	0:dcf3c92487ca	251	}
idinor	0:dcf3c92487ca	252
idinor	0:dcf3c92487ca	253
idinor	0:dcf3c92487ca	254	/*
idinor	0:dcf3c92487ca	255	* ipcp_input - Input IPCP packet.
idinor	0:dcf3c92487ca	256	*/
idinor	0:dcf3c92487ca	257	static void
idinor	0:dcf3c92487ca	258	ipcp_input(int unit, u_char *p, int len)
idinor	0:dcf3c92487ca	259	{
idinor	0:dcf3c92487ca	260	fsm_input(&ipcp_fsm[unit], p, len);
idinor	0:dcf3c92487ca	261	}
idinor	0:dcf3c92487ca	262
idinor	0:dcf3c92487ca	263
idinor	0:dcf3c92487ca	264	/*
idinor	0:dcf3c92487ca	265	* ipcp_protrej - A Protocol-Reject was received for IPCP.
idinor	0:dcf3c92487ca	266	*
idinor	0:dcf3c92487ca	267	* Pretend the lower layer went down, so we shut up.
idinor	0:dcf3c92487ca	268	*/
idinor	0:dcf3c92487ca	269	static void
idinor	0:dcf3c92487ca	270	ipcp_protrej(int unit)
idinor	0:dcf3c92487ca	271	{
idinor	0:dcf3c92487ca	272	fsm_lowerdown(&ipcp_fsm[unit]);
idinor	0:dcf3c92487ca	273	}
idinor	0:dcf3c92487ca	274
idinor	0:dcf3c92487ca	275
idinor	0:dcf3c92487ca	276	/*
idinor	0:dcf3c92487ca	277	* ipcp_resetci - Reset our CI.
idinor	0:dcf3c92487ca	278	*/
idinor	0:dcf3c92487ca	279	static void
idinor	0:dcf3c92487ca	280	ipcp_resetci(fsm *f)
idinor	0:dcf3c92487ca	281	{
idinor	0:dcf3c92487ca	282	ipcp_options *wo = &ipcp_wantoptions[f->unit];
idinor	0:dcf3c92487ca	283
idinor	0:dcf3c92487ca	284	wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
idinor	0:dcf3c92487ca	285	if (wo->ouraddr == 0) {
idinor	0:dcf3c92487ca	286	wo->accept_local = 1;
idinor	0:dcf3c92487ca	287	}
idinor	0:dcf3c92487ca	288	if (wo->hisaddr == 0) {
idinor	0:dcf3c92487ca	289	wo->accept_remote = 1;
idinor	0:dcf3c92487ca	290	}
idinor	0:dcf3c92487ca	291	/* Request DNS addresses from the peer */
idinor	0:dcf3c92487ca	292	wo->req_dns1 = ppp_settings.usepeerdns;
idinor	0:dcf3c92487ca	293	wo->req_dns2 = ppp_settings.usepeerdns;
idinor	0:dcf3c92487ca	294	ipcp_gotoptions[f->unit] = *wo;
idinor	0:dcf3c92487ca	295	cis_received[f->unit] = 0;
idinor	0:dcf3c92487ca	296	}
idinor	0:dcf3c92487ca	297
idinor	0:dcf3c92487ca	298
idinor	0:dcf3c92487ca	299	/*
idinor	0:dcf3c92487ca	300	* ipcp_cilen - Return length of our CI.
idinor	0:dcf3c92487ca	301	*/
idinor	0:dcf3c92487ca	302	static int
idinor	0:dcf3c92487ca	303	ipcp_cilen(fsm *f)
idinor	0:dcf3c92487ca	304	{
idinor	0:dcf3c92487ca	305	ipcp_options *go = &ipcp_gotoptions[f->unit];
idinor	0:dcf3c92487ca	306	ipcp_options *wo = &ipcp_wantoptions[f->unit];
idinor	0:dcf3c92487ca	307	ipcp_options *ho = &ipcp_hisoptions[f->unit];
idinor	0:dcf3c92487ca	308
idinor	0:dcf3c92487ca	309	#define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
idinor	0:dcf3c92487ca	310	#define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
idinor	0:dcf3c92487ca	311	#define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
idinor	0:dcf3c92487ca	312
idinor	0:dcf3c92487ca	313	/*
idinor	0:dcf3c92487ca	314	* First see if we want to change our options to the old
idinor	0:dcf3c92487ca	315	* forms because we have received old forms from the peer.
idinor	0:dcf3c92487ca	316	*/
idinor	0:dcf3c92487ca	317	if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
idinor	0:dcf3c92487ca	318	/* use the old style of address negotiation */
idinor	0:dcf3c92487ca	319	go->neg_addr = 1;
idinor	0:dcf3c92487ca	320	go->old_addrs = 1;
idinor	0:dcf3c92487ca	321	}
idinor	0:dcf3c92487ca	322	if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
idinor	0:dcf3c92487ca	323	/* try an older style of VJ negotiation */
idinor	0:dcf3c92487ca	324	if (cis_received[f->unit] == 0) {
idinor	0:dcf3c92487ca	325	/* keep trying the new style until we see some CI from the peer */
idinor	0:dcf3c92487ca	326	go->neg_vj = 1;
idinor	0:dcf3c92487ca	327	} else {
idinor	0:dcf3c92487ca	328	/* use the old style only if the peer did */
idinor	0:dcf3c92487ca	329	if (ho->neg_vj && ho->old_vj) {
idinor	0:dcf3c92487ca	330	go->neg_vj = 1;
idinor	0:dcf3c92487ca	331	go->old_vj = 1;
idinor	0:dcf3c92487ca	332	go->vj_protocol = ho->vj_protocol;
idinor	0:dcf3c92487ca	333	}
idinor	0:dcf3c92487ca	334	}
idinor	0:dcf3c92487ca	335	}
idinor	0:dcf3c92487ca	336
idinor	0:dcf3c92487ca	337	return (LENCIADDR(go->neg_addr, go->old_addrs) +
idinor	0:dcf3c92487ca	338	LENCIVJ(go->neg_vj, go->old_vj) +
idinor	0:dcf3c92487ca	339	LENCIDNS(go->req_dns1) +
idinor	0:dcf3c92487ca	340	LENCIDNS(go->req_dns2));
idinor	0:dcf3c92487ca	341	}
idinor	0:dcf3c92487ca	342
idinor	0:dcf3c92487ca	343
idinor	0:dcf3c92487ca	344	/*
idinor	0:dcf3c92487ca	345	* ipcp_addci - Add our desired CIs to a packet.
idinor	0:dcf3c92487ca	346	*/
idinor	0:dcf3c92487ca	347	static void
idinor	0:dcf3c92487ca	348	ipcp_addci(fsm f, u_char ucp, int *lenp)
idinor	0:dcf3c92487ca	349	{
idinor	0:dcf3c92487ca	350	ipcp_options *go = &ipcp_gotoptions[f->unit];
idinor	0:dcf3c92487ca	351	int len = *lenp;
idinor	0:dcf3c92487ca	352
idinor	0:dcf3c92487ca	353	#define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
idinor	0:dcf3c92487ca	354	if (neg) { \
idinor	0:dcf3c92487ca	355	int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
idinor	0:dcf3c92487ca	356	if (len >= vjlen) { \
idinor	0:dcf3c92487ca	357	PUTCHAR(opt, ucp); \
idinor	0:dcf3c92487ca	358	PUTCHAR(vjlen, ucp); \
idinor	0:dcf3c92487ca	359	PUTSHORT(val, ucp); \
idinor	0:dcf3c92487ca	360	if (!old) { \
idinor	0:dcf3c92487ca	361	PUTCHAR(maxslotindex, ucp); \
idinor	0:dcf3c92487ca	362	PUTCHAR(cflag, ucp); \
idinor	0:dcf3c92487ca	363	} \
idinor	0:dcf3c92487ca	364	len -= vjlen; \
idinor	0:dcf3c92487ca	365	} else { \
idinor	0:dcf3c92487ca	366	neg = 0; \
idinor	0:dcf3c92487ca	367	} \
idinor	0:dcf3c92487ca	368	}
idinor	0:dcf3c92487ca	369
idinor	0:dcf3c92487ca	370	#define ADDCIADDR(opt, neg, old, val1, val2) \
idinor	0:dcf3c92487ca	371	if (neg) { \
idinor	0:dcf3c92487ca	372	int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
idinor	0:dcf3c92487ca	373	if (len >= addrlen) { \
idinor	0:dcf3c92487ca	374	u32_t l; \
idinor	0:dcf3c92487ca	375	PUTCHAR(opt, ucp); \
idinor	0:dcf3c92487ca	376	PUTCHAR(addrlen, ucp); \
idinor	0:dcf3c92487ca	377	l = ntohl(val1); \
idinor	0:dcf3c92487ca	378	PUTLONG(l, ucp); \
idinor	0:dcf3c92487ca	379	if (old) { \
idinor	0:dcf3c92487ca	380	l = ntohl(val2); \
idinor	0:dcf3c92487ca	381	PUTLONG(l, ucp); \
idinor	0:dcf3c92487ca	382	} \
idinor	0:dcf3c92487ca	383	len -= addrlen; \
idinor	0:dcf3c92487ca	384	} else { \
idinor	0:dcf3c92487ca	385	neg = 0; \
idinor	0:dcf3c92487ca	386	} \
idinor	0:dcf3c92487ca	387	}
idinor	0:dcf3c92487ca	388
idinor	0:dcf3c92487ca	389	#define ADDCIDNS(opt, neg, addr) \
idinor	0:dcf3c92487ca	390	if (neg) { \
idinor	0:dcf3c92487ca	391	if (len >= CILEN_ADDR) { \
idinor	0:dcf3c92487ca	392	u32_t l; \
idinor	0:dcf3c92487ca	393	PUTCHAR(opt, ucp); \
idinor	0:dcf3c92487ca	394	PUTCHAR(CILEN_ADDR, ucp); \
idinor	0:dcf3c92487ca	395	l = ntohl(addr); \
idinor	0:dcf3c92487ca	396	PUTLONG(l, ucp); \
idinor	0:dcf3c92487ca	397	len -= CILEN_ADDR; \
idinor	0:dcf3c92487ca	398	} else { \
idinor	0:dcf3c92487ca	399	neg = 0; \
idinor	0:dcf3c92487ca	400	} \
idinor	0:dcf3c92487ca	401	}
idinor	0:dcf3c92487ca	402
idinor	0:dcf3c92487ca	403	ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
idinor	0:dcf3c92487ca	404	go->old_addrs, go->ouraddr, go->hisaddr);
idinor	0:dcf3c92487ca	405
idinor	0:dcf3c92487ca	406	ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
idinor	0:dcf3c92487ca	407	go->maxslotindex, go->cflag);
idinor	0:dcf3c92487ca	408
idinor	0:dcf3c92487ca	409	ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
idinor	0:dcf3c92487ca	410
idinor	0:dcf3c92487ca	411	ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
idinor	0:dcf3c92487ca	412
idinor	0:dcf3c92487ca	413	*lenp -= len;
idinor	0:dcf3c92487ca	414	}
idinor	0:dcf3c92487ca	415
idinor	0:dcf3c92487ca	416
idinor	0:dcf3c92487ca	417	/*
idinor	0:dcf3c92487ca	418	* ipcp_ackci - Ack our CIs.
idinor	0:dcf3c92487ca	419	*
idinor	0:dcf3c92487ca	420	* Returns:
idinor	0:dcf3c92487ca	421	* 0 - Ack was bad.
idinor	0:dcf3c92487ca	422	* 1 - Ack was good.
idinor	0:dcf3c92487ca	423	*/
idinor	0:dcf3c92487ca	424	static int
idinor	0:dcf3c92487ca	425	ipcp_ackci(fsm f, u_char p, int len)
idinor	0:dcf3c92487ca	426	{
idinor	0:dcf3c92487ca	427	ipcp_options *go = &ipcp_gotoptions[f->unit];
idinor	0:dcf3c92487ca	428	u_short cilen, citype, cishort;
idinor	0:dcf3c92487ca	429	u32_t cilong;
idinor	0:dcf3c92487ca	430	u_char cimaxslotindex, cicflag;
idinor	0:dcf3c92487ca	431
idinor	0:dcf3c92487ca	432	/*
idinor	0:dcf3c92487ca	433	* CIs must be in exactly the same order that we sent...
idinor	0:dcf3c92487ca	434	* Check packet length and CI length at each step.
idinor	0:dcf3c92487ca	435	* If we find any deviations, then this packet is bad.
idinor	0:dcf3c92487ca	436	*/
idinor	0:dcf3c92487ca	437
idinor	0:dcf3c92487ca	438	#define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
idinor	0:dcf3c92487ca	439	if (neg) { \
idinor	0:dcf3c92487ca	440	int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
idinor	0:dcf3c92487ca	441	if ((len -= vjlen) < 0) { \
idinor	0:dcf3c92487ca	442	goto bad; \
idinor	0:dcf3c92487ca	443	} \
idinor	0:dcf3c92487ca	444	GETCHAR(citype, p); \
idinor	0:dcf3c92487ca	445	GETCHAR(cilen, p); \
idinor	0:dcf3c92487ca	446	if (cilen != vjlen \|\| \
idinor	0:dcf3c92487ca	447	citype != opt) { \
idinor	0:dcf3c92487ca	448	goto bad; \
idinor	0:dcf3c92487ca	449	} \
idinor	0:dcf3c92487ca	450	GETSHORT(cishort, p); \
idinor	0:dcf3c92487ca	451	if (cishort != val) { \
idinor	0:dcf3c92487ca	452	goto bad; \
idinor	0:dcf3c92487ca	453	} \
idinor	0:dcf3c92487ca	454	if (!old) { \
idinor	0:dcf3c92487ca	455	GETCHAR(cimaxslotindex, p); \
idinor	0:dcf3c92487ca	456	if (cimaxslotindex != maxslotindex) { \
idinor	0:dcf3c92487ca	457	goto bad; \
idinor	0:dcf3c92487ca	458	} \
idinor	0:dcf3c92487ca	459	GETCHAR(cicflag, p); \
idinor	0:dcf3c92487ca	460	if (cicflag != cflag) { \
idinor	0:dcf3c92487ca	461	goto bad; \
idinor	0:dcf3c92487ca	462	} \
idinor	0:dcf3c92487ca	463	} \
idinor	0:dcf3c92487ca	464	}
idinor	0:dcf3c92487ca	465
idinor	0:dcf3c92487ca	466	#define ACKCIADDR(opt, neg, old, val1, val2) \
idinor	0:dcf3c92487ca	467	if (neg) { \
idinor	0:dcf3c92487ca	468	int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
idinor	0:dcf3c92487ca	469	u32_t l; \
idinor	0:dcf3c92487ca	470	if ((len -= addrlen) < 0) { \
idinor	0:dcf3c92487ca	471	goto bad; \
idinor	0:dcf3c92487ca	472	} \
idinor	0:dcf3c92487ca	473	GETCHAR(citype, p); \
idinor	0:dcf3c92487ca	474	GETCHAR(cilen, p); \
idinor	0:dcf3c92487ca	475	if (cilen != addrlen \|\| \
idinor	0:dcf3c92487ca	476	citype != opt) { \
idinor	0:dcf3c92487ca	477	goto bad; \
idinor	0:dcf3c92487ca	478	} \
idinor	0:dcf3c92487ca	479	GETLONG(l, p); \
idinor	0:dcf3c92487ca	480	cilong = htonl(l); \
idinor	0:dcf3c92487ca	481	if (val1 != cilong) { \
idinor	0:dcf3c92487ca	482	goto bad; \
idinor	0:dcf3c92487ca	483	} \
idinor	0:dcf3c92487ca	484	if (old) { \
idinor	0:dcf3c92487ca	485	GETLONG(l, p); \
idinor	0:dcf3c92487ca	486	cilong = htonl(l); \
idinor	0:dcf3c92487ca	487	if (val2 != cilong) { \
idinor	0:dcf3c92487ca	488	goto bad; \
idinor	0:dcf3c92487ca	489	} \
idinor	0:dcf3c92487ca	490	} \
idinor	0:dcf3c92487ca	491	}
idinor	0:dcf3c92487ca	492
idinor	0:dcf3c92487ca	493	#define ACKCIDNS(opt, neg, addr) \
idinor	0:dcf3c92487ca	494	if (neg) { \
idinor	0:dcf3c92487ca	495	u32_t l; \
idinor	0:dcf3c92487ca	496	if ((len -= CILEN_ADDR) < 0) { \
idinor	0:dcf3c92487ca	497	goto bad; \
idinor	0:dcf3c92487ca	498	} \
idinor	0:dcf3c92487ca	499	GETCHAR(citype, p); \
idinor	0:dcf3c92487ca	500	GETCHAR(cilen, p); \
idinor	0:dcf3c92487ca	501	if (cilen != CILEN_ADDR \|\| \
idinor	0:dcf3c92487ca	502	citype != opt) { \
idinor	0:dcf3c92487ca	503	goto bad; \
idinor	0:dcf3c92487ca	504	} \
idinor	0:dcf3c92487ca	505	GETLONG(l, p); \
idinor	0:dcf3c92487ca	506	cilong = htonl(l); \
idinor	0:dcf3c92487ca	507	if (addr != cilong) { \
idinor	0:dcf3c92487ca	508	goto bad; \
idinor	0:dcf3c92487ca	509	} \
idinor	0:dcf3c92487ca	510	}
idinor	0:dcf3c92487ca	511
idinor	0:dcf3c92487ca	512	ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
idinor	0:dcf3c92487ca	513	go->old_addrs, go->ouraddr, go->hisaddr);
idinor	0:dcf3c92487ca	514
idinor	0:dcf3c92487ca	515	ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
idinor	0:dcf3c92487ca	516	go->maxslotindex, go->cflag);
idinor	0:dcf3c92487ca	517
idinor	0:dcf3c92487ca	518	ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
idinor	0:dcf3c92487ca	519
idinor	0:dcf3c92487ca	520	ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
idinor	0:dcf3c92487ca	521
idinor	0:dcf3c92487ca	522	/*
idinor	0:dcf3c92487ca	523	* If there are any remaining CIs, then this packet is bad.
idinor	0:dcf3c92487ca	524	*/
idinor	0:dcf3c92487ca	525	if (len != 0) {
idinor	0:dcf3c92487ca	526	goto bad;
idinor	0:dcf3c92487ca	527	}
idinor	0:dcf3c92487ca	528	return (1);
idinor	0:dcf3c92487ca	529
idinor	0:dcf3c92487ca	530	bad:
idinor	0:dcf3c92487ca	531	IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
idinor	0:dcf3c92487ca	532	return (0);
idinor	0:dcf3c92487ca	533	}
idinor	0:dcf3c92487ca	534
idinor	0:dcf3c92487ca	535	/*
idinor	0:dcf3c92487ca	536	* ipcp_nakci - Peer has sent a NAK for some of our CIs.
idinor	0:dcf3c92487ca	537	* This should not modify any state if the Nak is bad
idinor	0:dcf3c92487ca	538	* or if IPCP is in the LS_OPENED state.
idinor	0:dcf3c92487ca	539	*
idinor	0:dcf3c92487ca	540	* Returns:
idinor	0:dcf3c92487ca	541	* 0 - Nak was bad.
idinor	0:dcf3c92487ca	542	* 1 - Nak was good.
idinor	0:dcf3c92487ca	543	*/
idinor	0:dcf3c92487ca	544	static int
idinor	0:dcf3c92487ca	545	ipcp_nakci(fsm f, u_char p, int len)
idinor	0:dcf3c92487ca	546	{
idinor	0:dcf3c92487ca	547	ipcp_options *go = &ipcp_gotoptions[f->unit];
idinor	0:dcf3c92487ca	548	u_char cimaxslotindex, cicflag;
idinor	0:dcf3c92487ca	549	u_char citype, cilen, *next;
idinor	0:dcf3c92487ca	550	u_short cishort;
idinor	0:dcf3c92487ca	551	u32_t ciaddr1, ciaddr2, l, cidnsaddr;
idinor	0:dcf3c92487ca	552	ipcp_options no; /* options we've seen Naks for */
idinor	0:dcf3c92487ca	553	ipcp_options try; /* options to request next time */
idinor	0:dcf3c92487ca	554
idinor	0:dcf3c92487ca	555	BZERO(&no, sizeof(no));
idinor	0:dcf3c92487ca	556	try = *go;
idinor	0:dcf3c92487ca	557
idinor	0:dcf3c92487ca	558	/*
idinor	0:dcf3c92487ca	559	* Any Nak'd CIs must be in exactly the same order that we sent.
idinor	0:dcf3c92487ca	560	* Check packet length and CI length at each step.
idinor	0:dcf3c92487ca	561	* If we find any deviations, then this packet is bad.
idinor	0:dcf3c92487ca	562	*/
idinor	0:dcf3c92487ca	563	#define NAKCIADDR(opt, neg, old, code) \
idinor	0:dcf3c92487ca	564	if (go->neg && \
idinor	0:dcf3c92487ca	565	len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
idinor	0:dcf3c92487ca	566	p[1] == cilen && \
idinor	0:dcf3c92487ca	567	p[0] == opt) { \
idinor	0:dcf3c92487ca	568	len -= cilen; \
idinor	0:dcf3c92487ca	569	INCPTR(2, p); \
idinor	0:dcf3c92487ca	570	GETLONG(l, p); \
idinor	0:dcf3c92487ca	571	ciaddr1 = htonl(l); \
idinor	0:dcf3c92487ca	572	if (old) { \
idinor	0:dcf3c92487ca	573	GETLONG(l, p); \
idinor	0:dcf3c92487ca	574	ciaddr2 = htonl(l); \
idinor	0:dcf3c92487ca	575	no.old_addrs = 1; \
idinor	0:dcf3c92487ca	576	} else { \
idinor	0:dcf3c92487ca	577	ciaddr2 = 0; \
idinor	0:dcf3c92487ca	578	} \
idinor	0:dcf3c92487ca	579	no.neg = 1; \
idinor	0:dcf3c92487ca	580	code \
idinor	0:dcf3c92487ca	581	}
idinor	0:dcf3c92487ca	582
idinor	0:dcf3c92487ca	583	#define NAKCIVJ(opt, neg, code) \
idinor	0:dcf3c92487ca	584	if (go->neg && \
idinor	0:dcf3c92487ca	585	((cilen = p[1]) == CILEN_COMPRESS \|\| cilen == CILEN_VJ) && \
idinor	0:dcf3c92487ca	586	len >= cilen && \
idinor	0:dcf3c92487ca	587	p[0] == opt) { \
idinor	0:dcf3c92487ca	588	len -= cilen; \
idinor	0:dcf3c92487ca	589	INCPTR(2, p); \
idinor	0:dcf3c92487ca	590	GETSHORT(cishort, p); \
idinor	0:dcf3c92487ca	591	no.neg = 1; \
idinor	0:dcf3c92487ca	592	code \
idinor	0:dcf3c92487ca	593	}
idinor	0:dcf3c92487ca	594
idinor	0:dcf3c92487ca	595	#define NAKCIDNS(opt, neg, code) \
idinor	0:dcf3c92487ca	596	if (go->neg && \
idinor	0:dcf3c92487ca	597	((cilen = p[1]) == CILEN_ADDR) && \
idinor	0:dcf3c92487ca	598	len >= cilen && \
idinor	0:dcf3c92487ca	599	p[0] == opt) { \
idinor	0:dcf3c92487ca	600	len -= cilen; \
idinor	0:dcf3c92487ca	601	INCPTR(2, p); \
idinor	0:dcf3c92487ca	602	GETLONG(l, p); \
idinor	0:dcf3c92487ca	603	cidnsaddr = htonl(l); \
idinor	0:dcf3c92487ca	604	no.neg = 1; \
idinor	0:dcf3c92487ca	605	code \
idinor	0:dcf3c92487ca	606	}
idinor	0:dcf3c92487ca	607
idinor	0:dcf3c92487ca	608	/*
idinor	0:dcf3c92487ca	609	* Accept the peer's idea of {our,his} address, if different
idinor	0:dcf3c92487ca	610	* from our idea, only if the accept_{local,remote} flag is set.
idinor	0:dcf3c92487ca	611	*/
idinor	0:dcf3c92487ca	612	NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
idinor	0:dcf3c92487ca	613	if (go->accept_local && ciaddr1) { /* Do we know our address? */
idinor	0:dcf3c92487ca	614	try.ouraddr = ciaddr1;
idinor	0:dcf3c92487ca	615	IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
idinor	0:dcf3c92487ca	616	inet_ntoa(ciaddr1)));
idinor	0:dcf3c92487ca	617	}
idinor	0:dcf3c92487ca	618	if (go->accept_remote && ciaddr2) { /* Does he know his? */
idinor	0:dcf3c92487ca	619	try.hisaddr = ciaddr2;
idinor	0:dcf3c92487ca	620	IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
idinor	0:dcf3c92487ca	621	inet_ntoa(ciaddr2)));
idinor	0:dcf3c92487ca	622	}
idinor	0:dcf3c92487ca	623	);
idinor	0:dcf3c92487ca	624
idinor	0:dcf3c92487ca	625	/*
idinor	0:dcf3c92487ca	626	* Accept the peer's value of maxslotindex provided that it
idinor	0:dcf3c92487ca	627	* is less than what we asked for. Turn off slot-ID compression
idinor	0:dcf3c92487ca	628	* if the peer wants. Send old-style compress-type option if
idinor	0:dcf3c92487ca	629	* the peer wants.
idinor	0:dcf3c92487ca	630	*/
idinor	0:dcf3c92487ca	631	NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
idinor	0:dcf3c92487ca	632	if (cilen == CILEN_VJ) {
idinor	0:dcf3c92487ca	633	GETCHAR(cimaxslotindex, p);
idinor	0:dcf3c92487ca	634	GETCHAR(cicflag, p);
idinor	0:dcf3c92487ca	635	if (cishort == IPCP_VJ_COMP) {
idinor	0:dcf3c92487ca	636	try.old_vj = 0;
idinor	0:dcf3c92487ca	637	if (cimaxslotindex < go->maxslotindex) {
idinor	0:dcf3c92487ca	638	try.maxslotindex = cimaxslotindex;
idinor	0:dcf3c92487ca	639	}
idinor	0:dcf3c92487ca	640	if (!cicflag) {
idinor	0:dcf3c92487ca	641	try.cflag = 0;
idinor	0:dcf3c92487ca	642	}
idinor	0:dcf3c92487ca	643	} else {
idinor	0:dcf3c92487ca	644	try.neg_vj = 0;
idinor	0:dcf3c92487ca	645	}
idinor	0:dcf3c92487ca	646	} else {
idinor	0:dcf3c92487ca	647	if (cishort == IPCP_VJ_COMP \|\| cishort == IPCP_VJ_COMP_OLD) {
idinor	0:dcf3c92487ca	648	try.old_vj = 1;
idinor	0:dcf3c92487ca	649	try.vj_protocol = cishort;
idinor	0:dcf3c92487ca	650	} else {
idinor	0:dcf3c92487ca	651	try.neg_vj = 0;
idinor	0:dcf3c92487ca	652	}
idinor	0:dcf3c92487ca	653	}
idinor	0:dcf3c92487ca	654	);
idinor	0:dcf3c92487ca	655
idinor	0:dcf3c92487ca	656	NAKCIDNS(CI_MS_DNS1, req_dns1,
idinor	0:dcf3c92487ca	657	try.dnsaddr[0] = cidnsaddr;
idinor	0:dcf3c92487ca	658	IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
idinor	0:dcf3c92487ca	659	);
idinor	0:dcf3c92487ca	660
idinor	0:dcf3c92487ca	661	NAKCIDNS(CI_MS_DNS2, req_dns2,
idinor	0:dcf3c92487ca	662	try.dnsaddr[1] = cidnsaddr;
idinor	0:dcf3c92487ca	663	IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
idinor	0:dcf3c92487ca	664	);
idinor	0:dcf3c92487ca	665
idinor	0:dcf3c92487ca	666	/*
idinor	0:dcf3c92487ca	667	* There may be remaining CIs, if the peer is requesting negotiation
idinor	0:dcf3c92487ca	668	* on an option that we didn't include in our request packet.
idinor	0:dcf3c92487ca	669	* If they want to negotiate about IP addresses, we comply.
idinor	0:dcf3c92487ca	670	* If they want us to ask for compression, we refuse.
idinor	0:dcf3c92487ca	671	*/
idinor	0:dcf3c92487ca	672	while (len > CILEN_VOID) {
idinor	0:dcf3c92487ca	673	GETCHAR(citype, p);
idinor	0:dcf3c92487ca	674	GETCHAR(cilen, p);
idinor	0:dcf3c92487ca	675	if( (len -= cilen) < 0 ) {
idinor	0:dcf3c92487ca	676	goto bad;
idinor	0:dcf3c92487ca	677	}
idinor	0:dcf3c92487ca	678	next = p + cilen - 2;
idinor	0:dcf3c92487ca	679
idinor	0:dcf3c92487ca	680	switch (citype) {
idinor	0:dcf3c92487ca	681	case CI_COMPRESSTYPE:
idinor	0:dcf3c92487ca	682	if (go->neg_vj \|\| no.neg_vj \|\|
idinor	0:dcf3c92487ca	683	(cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
idinor	0:dcf3c92487ca	684	goto bad;
idinor	0:dcf3c92487ca	685	}
idinor	0:dcf3c92487ca	686	no.neg_vj = 1;
idinor	0:dcf3c92487ca	687	break;
idinor	0:dcf3c92487ca	688	case CI_ADDRS:
idinor	0:dcf3c92487ca	689	if ((go->neg_addr && go->old_addrs) \|\| no.old_addrs
idinor	0:dcf3c92487ca	690	\|\| cilen != CILEN_ADDRS) {
idinor	0:dcf3c92487ca	691	goto bad;
idinor	0:dcf3c92487ca	692	}
idinor	0:dcf3c92487ca	693	try.neg_addr = 1;
idinor	0:dcf3c92487ca	694	try.old_addrs = 1;
idinor	0:dcf3c92487ca	695	GETLONG(l, p);
idinor	0:dcf3c92487ca	696	ciaddr1 = htonl(l);
idinor	0:dcf3c92487ca	697	if (ciaddr1 && go->accept_local) {
idinor	0:dcf3c92487ca	698	try.ouraddr = ciaddr1;
idinor	0:dcf3c92487ca	699	}
idinor	0:dcf3c92487ca	700	GETLONG(l, p);
idinor	0:dcf3c92487ca	701	ciaddr2 = htonl(l);
idinor	0:dcf3c92487ca	702	if (ciaddr2 && go->accept_remote) {
idinor	0:dcf3c92487ca	703	try.hisaddr = ciaddr2;
idinor	0:dcf3c92487ca	704	}
idinor	0:dcf3c92487ca	705	no.old_addrs = 1;
idinor	0:dcf3c92487ca	706	break;
idinor	0:dcf3c92487ca	707	case CI_ADDR:
idinor	0:dcf3c92487ca	708	if (go->neg_addr \|\| no.neg_addr \|\| cilen != CILEN_ADDR) {
idinor	0:dcf3c92487ca	709	goto bad;
idinor	0:dcf3c92487ca	710	}
idinor	0:dcf3c92487ca	711	try.old_addrs = 0;
idinor	0:dcf3c92487ca	712	GETLONG(l, p);
idinor	0:dcf3c92487ca	713	ciaddr1 = htonl(l);
idinor	0:dcf3c92487ca	714	if (ciaddr1 && go->accept_local) {
idinor	0:dcf3c92487ca	715	try.ouraddr = ciaddr1;
idinor	0:dcf3c92487ca	716	}
idinor	0:dcf3c92487ca	717	if (try.ouraddr != 0) {
idinor	0:dcf3c92487ca	718	try.neg_addr = 1;
idinor	0:dcf3c92487ca	719	}
idinor	0:dcf3c92487ca	720	no.neg_addr = 1;
idinor	0:dcf3c92487ca	721	break;
idinor	0:dcf3c92487ca	722	}
idinor	0:dcf3c92487ca	723	p = next;
idinor	0:dcf3c92487ca	724	}
idinor	0:dcf3c92487ca	725
idinor	0:dcf3c92487ca	726	/* If there is still anything left, this packet is bad. */
idinor	0:dcf3c92487ca	727	if (len != 0) {
idinor	0:dcf3c92487ca	728	goto bad;
idinor	0:dcf3c92487ca	729	}
idinor	0:dcf3c92487ca	730
idinor	0:dcf3c92487ca	731	/*
idinor	0:dcf3c92487ca	732	* OK, the Nak is good. Now we can update state.
idinor	0:dcf3c92487ca	733	*/
idinor	0:dcf3c92487ca	734	if (f->state != LS_OPENED) {
idinor	0:dcf3c92487ca	735	*go = try;
idinor	0:dcf3c92487ca	736	}
idinor	0:dcf3c92487ca	737
idinor	0:dcf3c92487ca	738	return 1;
idinor	0:dcf3c92487ca	739
idinor	0:dcf3c92487ca	740	bad:
idinor	0:dcf3c92487ca	741	IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
idinor	0:dcf3c92487ca	742	return 0;
idinor	0:dcf3c92487ca	743	}
idinor	0:dcf3c92487ca	744
idinor	0:dcf3c92487ca	745
idinor	0:dcf3c92487ca	746	/*
idinor	0:dcf3c92487ca	747	* ipcp_rejci - Reject some of our CIs.
idinor	0:dcf3c92487ca	748	*/
idinor	0:dcf3c92487ca	749	static int
idinor	0:dcf3c92487ca	750	ipcp_rejci(fsm f, u_char p, int len)
idinor	0:dcf3c92487ca	751	{
idinor	0:dcf3c92487ca	752	ipcp_options *go = &ipcp_gotoptions[f->unit];
idinor	0:dcf3c92487ca	753	u_char cimaxslotindex, ciflag, cilen;
idinor	0:dcf3c92487ca	754	u_short cishort;
idinor	0:dcf3c92487ca	755	u32_t cilong;
idinor	0:dcf3c92487ca	756	ipcp_options try; /* options to request next time */
idinor	0:dcf3c92487ca	757
idinor	0:dcf3c92487ca	758	try = *go;
idinor	0:dcf3c92487ca	759	/*
idinor	0:dcf3c92487ca	760	* Any Rejected CIs must be in exactly the same order that we sent.
idinor	0:dcf3c92487ca	761	* Check packet length and CI length at each step.
idinor	0:dcf3c92487ca	762	* If we find any deviations, then this packet is bad.
idinor	0:dcf3c92487ca	763	*/
idinor	0:dcf3c92487ca	764	#define REJCIADDR(opt, neg, old, val1, val2) \
idinor	0:dcf3c92487ca	765	if (go->neg && \
idinor	0:dcf3c92487ca	766	len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
idinor	0:dcf3c92487ca	767	p[1] == cilen && \
idinor	0:dcf3c92487ca	768	p[0] == opt) { \
idinor	0:dcf3c92487ca	769	u32_t l; \
idinor	0:dcf3c92487ca	770	len -= cilen; \
idinor	0:dcf3c92487ca	771	INCPTR(2, p); \
idinor	0:dcf3c92487ca	772	GETLONG(l, p); \
idinor	0:dcf3c92487ca	773	cilong = htonl(l); \
idinor	0:dcf3c92487ca	774	/* Check rejected value. */ \
idinor	0:dcf3c92487ca	775	if (cilong != val1) { \
idinor	0:dcf3c92487ca	776	goto bad; \
idinor	0:dcf3c92487ca	777	} \
idinor	0:dcf3c92487ca	778	if (old) { \
idinor	0:dcf3c92487ca	779	GETLONG(l, p); \
idinor	0:dcf3c92487ca	780	cilong = htonl(l); \
idinor	0:dcf3c92487ca	781	/* Check rejected value. */ \
idinor	0:dcf3c92487ca	782	if (cilong != val2) { \
idinor	0:dcf3c92487ca	783	goto bad; \
idinor	0:dcf3c92487ca	784	} \
idinor	0:dcf3c92487ca	785	} \
idinor	0:dcf3c92487ca	786	try.neg = 0; \
idinor	0:dcf3c92487ca	787	}
idinor	0:dcf3c92487ca	788
idinor	0:dcf3c92487ca	789	#define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
idinor	0:dcf3c92487ca	790	if (go->neg && \
idinor	0:dcf3c92487ca	791	p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
idinor	0:dcf3c92487ca	792	len >= p[1] && \
idinor	0:dcf3c92487ca	793	p[0] == opt) { \
idinor	0:dcf3c92487ca	794	len -= p[1]; \
idinor	0:dcf3c92487ca	795	INCPTR(2, p); \
idinor	0:dcf3c92487ca	796	GETSHORT(cishort, p); \
idinor	0:dcf3c92487ca	797	/* Check rejected value. */ \
idinor	0:dcf3c92487ca	798	if (cishort != val) { \
idinor	0:dcf3c92487ca	799	goto bad; \
idinor	0:dcf3c92487ca	800	} \
idinor	0:dcf3c92487ca	801	if (!old) { \
idinor	0:dcf3c92487ca	802	GETCHAR(cimaxslotindex, p); \
idinor	0:dcf3c92487ca	803	if (cimaxslotindex != maxslot) { \
idinor	0:dcf3c92487ca	804	goto bad; \
idinor	0:dcf3c92487ca	805	} \
idinor	0:dcf3c92487ca	806	GETCHAR(ciflag, p); \
idinor	0:dcf3c92487ca	807	if (ciflag != cflag) { \
idinor	0:dcf3c92487ca	808	goto bad; \
idinor	0:dcf3c92487ca	809	} \
idinor	0:dcf3c92487ca	810	} \
idinor	0:dcf3c92487ca	811	try.neg = 0; \
idinor	0:dcf3c92487ca	812	}
idinor	0:dcf3c92487ca	813
idinor	0:dcf3c92487ca	814	#define REJCIDNS(opt, neg, dnsaddr) \
idinor	0:dcf3c92487ca	815	if (go->neg && \
idinor	0:dcf3c92487ca	816	((cilen = p[1]) == CILEN_ADDR) && \
idinor	0:dcf3c92487ca	817	len >= cilen && \
idinor	0:dcf3c92487ca	818	p[0] == opt) { \
idinor	0:dcf3c92487ca	819	u32_t l; \
idinor	0:dcf3c92487ca	820	len -= cilen; \
idinor	0:dcf3c92487ca	821	INCPTR(2, p); \
idinor	0:dcf3c92487ca	822	GETLONG(l, p); \
idinor	0:dcf3c92487ca	823	cilong = htonl(l); \
idinor	0:dcf3c92487ca	824	/* Check rejected value. */ \
idinor	0:dcf3c92487ca	825	if (cilong != dnsaddr) { \
idinor	0:dcf3c92487ca	826	goto bad; \
idinor	0:dcf3c92487ca	827	} \
idinor	0:dcf3c92487ca	828	try.neg = 0; \
idinor	0:dcf3c92487ca	829	}
idinor	0:dcf3c92487ca	830
idinor	0:dcf3c92487ca	831	REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
idinor	0:dcf3c92487ca	832	go->old_addrs, go->ouraddr, go->hisaddr);
idinor	0:dcf3c92487ca	833
idinor	0:dcf3c92487ca	834	REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
idinor	0:dcf3c92487ca	835	go->maxslotindex, go->cflag);
idinor	0:dcf3c92487ca	836
idinor	0:dcf3c92487ca	837	REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
idinor	0:dcf3c92487ca	838
idinor	0:dcf3c92487ca	839	REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
idinor	0:dcf3c92487ca	840
idinor	0:dcf3c92487ca	841	/*
idinor	0:dcf3c92487ca	842	* If there are any remaining CIs, then this packet is bad.
idinor	0:dcf3c92487ca	843	*/
idinor	0:dcf3c92487ca	844	if (len != 0) {
idinor	0:dcf3c92487ca	845	goto bad;
idinor	0:dcf3c92487ca	846	}
idinor	0:dcf3c92487ca	847	/*
idinor	0:dcf3c92487ca	848	* Now we can update state.
idinor	0:dcf3c92487ca	849	*/
idinor	0:dcf3c92487ca	850	if (f->state != LS_OPENED) {
idinor	0:dcf3c92487ca	851	*go = try;
idinor	0:dcf3c92487ca	852	}
idinor	0:dcf3c92487ca	853	return 1;
idinor	0:dcf3c92487ca	854
idinor	0:dcf3c92487ca	855	bad:
idinor	0:dcf3c92487ca	856	IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
idinor	0:dcf3c92487ca	857	return 0;
idinor	0:dcf3c92487ca	858	}
idinor	0:dcf3c92487ca	859
idinor	0:dcf3c92487ca	860
idinor	0:dcf3c92487ca	861	/*
idinor	0:dcf3c92487ca	862	* ipcp_reqci - Check the peer's requested CIs and send appropriate response.
idinor	0:dcf3c92487ca	863	*
idinor	0:dcf3c92487ca	864	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
idinor	0:dcf3c92487ca	865	* appropriately. If reject_if_disagree is non-zero, doesn't return
idinor	0:dcf3c92487ca	866	* CONFNAK; returns CONFREJ if it can't return CONFACK.
idinor	0:dcf3c92487ca	867	*/
idinor	0:dcf3c92487ca	868	static int
idinor	0:dcf3c92487ca	869	ipcp_reqci(fsm f, u_char inp/* Requested CIs /,int len/* Length of requested CIs */,int reject_if_disagree)
idinor	0:dcf3c92487ca	870	{
idinor	0:dcf3c92487ca	871	ipcp_options *wo = &ipcp_wantoptions[f->unit];
idinor	0:dcf3c92487ca	872	ipcp_options *ho = &ipcp_hisoptions[f->unit];
idinor	0:dcf3c92487ca	873	ipcp_options *ao = &ipcp_allowoptions[f->unit];
idinor	0:dcf3c92487ca	874	#ifdef OLD_CI_ADDRS
idinor	0:dcf3c92487ca	875	ipcp_options *go = &ipcp_gotoptions[f->unit];
idinor	0:dcf3c92487ca	876	#endif
idinor	0:dcf3c92487ca	877	u_char cip, next; /* Pointer to current and next CIs */
idinor	0:dcf3c92487ca	878	u_short cilen, citype; /* Parsed len, type */
idinor	0:dcf3c92487ca	879	u_short cishort; /* Parsed short value */
idinor	0:dcf3c92487ca	880	u32_t tl, ciaddr1; /* Parsed address values */
idinor	0:dcf3c92487ca	881	#ifdef OLD_CI_ADDRS
idinor	0:dcf3c92487ca	882	u32_t ciaddr2; /* Parsed address values */
idinor	0:dcf3c92487ca	883	#endif
idinor	0:dcf3c92487ca	884	int rc = CONFACK; /* Final packet return code */
idinor	0:dcf3c92487ca	885	int orc; /* Individual option return code */
idinor	0:dcf3c92487ca	886	u_char p; / Pointer to next char to parse */
idinor	0:dcf3c92487ca	887	u_char ucp = inp; / Pointer to current output char */
idinor	0:dcf3c92487ca	888	int l = len; / Length left */
idinor	0:dcf3c92487ca	889	u_char maxslotindex, cflag;
idinor	0:dcf3c92487ca	890	int d;
idinor	0:dcf3c92487ca	891
idinor	0:dcf3c92487ca	892	cis_received[f->unit] = 1;
idinor	0:dcf3c92487ca	893
idinor	0:dcf3c92487ca	894	/*
idinor	0:dcf3c92487ca	895	* Reset all his options.
idinor	0:dcf3c92487ca	896	*/
idinor	0:dcf3c92487ca	897	BZERO(ho, sizeof(*ho));
idinor	0:dcf3c92487ca	898
idinor	0:dcf3c92487ca	899	/*
idinor	0:dcf3c92487ca	900	* Process all his options.
idinor	0:dcf3c92487ca	901	*/
idinor	0:dcf3c92487ca	902	next = inp;
idinor	0:dcf3c92487ca	903	while (l) {
idinor	0:dcf3c92487ca	904	orc = CONFACK; /* Assume success */
idinor	0:dcf3c92487ca	905	cip = p = next; /* Remember begining of CI */
idinor	0:dcf3c92487ca	906	if (l < 2 \|\| /* Not enough data for CI header or */
idinor	0:dcf3c92487ca	907	p[1] < 2 \|\| /* CI length too small or */
idinor	0:dcf3c92487ca	908	p[1] > l) { /* CI length too big? */
idinor	0:dcf3c92487ca	909	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
idinor	0:dcf3c92487ca	910	orc = CONFREJ; /* Reject bad CI */
idinor	0:dcf3c92487ca	911	cilen = (u_short)l;/* Reject till end of packet */
idinor	0:dcf3c92487ca	912	l = 0; /* Don't loop again */
idinor	0:dcf3c92487ca	913	goto endswitch;
idinor	0:dcf3c92487ca	914	}
idinor	0:dcf3c92487ca	915	GETCHAR(citype, p); /* Parse CI type */
idinor	0:dcf3c92487ca	916	GETCHAR(cilen, p); /* Parse CI length */
idinor	0:dcf3c92487ca	917	l -= cilen; /* Adjust remaining length */
idinor	0:dcf3c92487ca	918	next += cilen; /* Step to next CI */
idinor	0:dcf3c92487ca	919
idinor	0:dcf3c92487ca	920	switch (citype) { /* Check CI type */
idinor	0:dcf3c92487ca	921	#ifdef OLD_CI_ADDRS /* Need to save space... */
idinor	0:dcf3c92487ca	922	case CI_ADDRS:
idinor	0:dcf3c92487ca	923	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
idinor	0:dcf3c92487ca	924	if (!ao->neg_addr \|\|
idinor	0:dcf3c92487ca	925	cilen != CILEN_ADDRS) { /* Check CI length */
idinor	0:dcf3c92487ca	926	orc = CONFREJ; /* Reject CI */
idinor	0:dcf3c92487ca	927	break;
idinor	0:dcf3c92487ca	928	}
idinor	0:dcf3c92487ca	929
idinor	0:dcf3c92487ca	930	/*
idinor	0:dcf3c92487ca	931	* If he has no address, or if we both have his address but
idinor	0:dcf3c92487ca	932	* disagree about it, then NAK it with our idea.
idinor	0:dcf3c92487ca	933	* In particular, if we don't know his address, but he does,
idinor	0:dcf3c92487ca	934	* then accept it.
idinor	0:dcf3c92487ca	935	*/
idinor	0:dcf3c92487ca	936	GETLONG(tl, p); /* Parse source address (his) */
idinor	0:dcf3c92487ca	937	ciaddr1 = htonl(tl);
idinor	0:dcf3c92487ca	938	IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
idinor	0:dcf3c92487ca	939	if (ciaddr1 != wo->hisaddr
idinor	0:dcf3c92487ca	940	&& (ciaddr1 == 0 \|\| !wo->accept_remote)) {
idinor	0:dcf3c92487ca	941	orc = CONFNAK;
idinor	0:dcf3c92487ca	942	if (!reject_if_disagree) {
idinor	0:dcf3c92487ca	943	DECPTR(sizeof(u32_t), p);
idinor	0:dcf3c92487ca	944	tl = ntohl(wo->hisaddr);
idinor	0:dcf3c92487ca	945	PUTLONG(tl, p);
idinor	0:dcf3c92487ca	946	}
idinor	0:dcf3c92487ca	947	} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
idinor	0:dcf3c92487ca	948	/*
idinor	0:dcf3c92487ca	949	* If neither we nor he knows his address, reject the option.
idinor	0:dcf3c92487ca	950	*/
idinor	0:dcf3c92487ca	951	orc = CONFREJ;
idinor	0:dcf3c92487ca	952	wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
idinor	0:dcf3c92487ca	953	break;
idinor	0:dcf3c92487ca	954	}
idinor	0:dcf3c92487ca	955
idinor	0:dcf3c92487ca	956	/*
idinor	0:dcf3c92487ca	957	* If he doesn't know our address, or if we both have our address
idinor	0:dcf3c92487ca	958	* but disagree about it, then NAK it with our idea.
idinor	0:dcf3c92487ca	959	*/
idinor	0:dcf3c92487ca	960	GETLONG(tl, p); /* Parse desination address (ours) */
idinor	0:dcf3c92487ca	961	ciaddr2 = htonl(tl);
idinor	0:dcf3c92487ca	962	IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
idinor	0:dcf3c92487ca	963	if (ciaddr2 != wo->ouraddr) {
idinor	0:dcf3c92487ca	964	if (ciaddr2 == 0 \|\| !wo->accept_local) {
idinor	0:dcf3c92487ca	965	orc = CONFNAK;
idinor	0:dcf3c92487ca	966	if (!reject_if_disagree) {
idinor	0:dcf3c92487ca	967	DECPTR(sizeof(u32_t), p);
idinor	0:dcf3c92487ca	968	tl = ntohl(wo->ouraddr);
idinor	0:dcf3c92487ca	969	PUTLONG(tl, p);
idinor	0:dcf3c92487ca	970	}
idinor	0:dcf3c92487ca	971	} else {
idinor	0:dcf3c92487ca	972	go->ouraddr = ciaddr2; /* accept peer's idea */
idinor	0:dcf3c92487ca	973	}
idinor	0:dcf3c92487ca	974	}
idinor	0:dcf3c92487ca	975
idinor	0:dcf3c92487ca	976	ho->neg_addr = 1;
idinor	0:dcf3c92487ca	977	ho->old_addrs = 1;
idinor	0:dcf3c92487ca	978	ho->hisaddr = ciaddr1;
idinor	0:dcf3c92487ca	979	ho->ouraddr = ciaddr2;
idinor	0:dcf3c92487ca	980	break;
idinor	0:dcf3c92487ca	981	#endif
idinor	0:dcf3c92487ca	982
idinor	0:dcf3c92487ca	983	case CI_ADDR:
idinor	0:dcf3c92487ca	984	if (!ao->neg_addr) {
idinor	0:dcf3c92487ca	985	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
idinor	0:dcf3c92487ca	986	orc = CONFREJ; /* Reject CI */
idinor	0:dcf3c92487ca	987	break;
idinor	0:dcf3c92487ca	988	} else if (cilen != CILEN_ADDR) { /* Check CI length */
idinor	0:dcf3c92487ca	989	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
idinor	0:dcf3c92487ca	990	orc = CONFREJ; /* Reject CI */
idinor	0:dcf3c92487ca	991	break;
idinor	0:dcf3c92487ca	992	}
idinor	0:dcf3c92487ca	993
idinor	0:dcf3c92487ca	994	/*
idinor	0:dcf3c92487ca	995	* If he has no address, or if we both have his address but
idinor	0:dcf3c92487ca	996	* disagree about it, then NAK it with our idea.
idinor	0:dcf3c92487ca	997	* In particular, if we don't know his address, but he does,
idinor	0:dcf3c92487ca	998	* then accept it.
idinor	0:dcf3c92487ca	999	*/
idinor	0:dcf3c92487ca	1000	GETLONG(tl, p); /* Parse source address (his) */
idinor	0:dcf3c92487ca	1001	ciaddr1 = htonl(tl);
idinor	0:dcf3c92487ca	1002	if (ciaddr1 != wo->hisaddr
idinor	0:dcf3c92487ca	1003	&& (ciaddr1 == 0 \|\| !wo->accept_remote)) {
idinor	0:dcf3c92487ca	1004	orc = CONFNAK;
idinor	0:dcf3c92487ca	1005	if (!reject_if_disagree) {
idinor	0:dcf3c92487ca	1006	DECPTR(sizeof(u32_t), p);
idinor	0:dcf3c92487ca	1007	tl = ntohl(wo->hisaddr);
idinor	0:dcf3c92487ca	1008	PUTLONG(tl, p);
idinor	0:dcf3c92487ca	1009	}
idinor	0:dcf3c92487ca	1010	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
idinor	0:dcf3c92487ca	1011	} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
idinor	0:dcf3c92487ca	1012	/*
idinor	0:dcf3c92487ca	1013	* Don't ACK an address of 0.0.0.0 - reject it instead.
idinor	0:dcf3c92487ca	1014	*/
idinor	0:dcf3c92487ca	1015	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
idinor	0:dcf3c92487ca	1016	orc = CONFREJ;
idinor	0:dcf3c92487ca	1017	wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
idinor	0:dcf3c92487ca	1018	break;
idinor	0:dcf3c92487ca	1019	}
idinor	0:dcf3c92487ca	1020
idinor	0:dcf3c92487ca	1021	ho->neg_addr = 1;
idinor	0:dcf3c92487ca	1022	ho->hisaddr = ciaddr1;
idinor	0:dcf3c92487ca	1023	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
idinor	0:dcf3c92487ca	1024	break;
idinor	0:dcf3c92487ca	1025
idinor	0:dcf3c92487ca	1026	case CI_MS_DNS1:
idinor	0:dcf3c92487ca	1027	case CI_MS_DNS2:
idinor	0:dcf3c92487ca	1028	/* Microsoft primary or secondary DNS request */
idinor	0:dcf3c92487ca	1029	d = citype == CI_MS_DNS2;
idinor	0:dcf3c92487ca	1030
idinor	0:dcf3c92487ca	1031	/* If we do not have a DNS address then we cannot send it */
idinor	0:dcf3c92487ca	1032	if (ao->dnsaddr[d] == 0 \|\|
idinor	0:dcf3c92487ca	1033	cilen != CILEN_ADDR) { /* Check CI length */
idinor	0:dcf3c92487ca	1034	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
idinor	0:dcf3c92487ca	1035	orc = CONFREJ; /* Reject CI */
idinor	0:dcf3c92487ca	1036	break;
idinor	0:dcf3c92487ca	1037	}
idinor	0:dcf3c92487ca	1038	GETLONG(tl, p);
idinor	0:dcf3c92487ca	1039	if (htonl(tl) != ao->dnsaddr[d]) {
idinor	0:dcf3c92487ca	1040	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
idinor	0:dcf3c92487ca	1041	d+1, inet_ntoa(tl)));
idinor	0:dcf3c92487ca	1042	DECPTR(sizeof(u32_t), p);
idinor	0:dcf3c92487ca	1043	tl = ntohl(ao->dnsaddr[d]);
idinor	0:dcf3c92487ca	1044	PUTLONG(tl, p);
idinor	0:dcf3c92487ca	1045	orc = CONFNAK;
idinor	0:dcf3c92487ca	1046	}
idinor	0:dcf3c92487ca	1047	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
idinor	0:dcf3c92487ca	1048	break;
idinor	0:dcf3c92487ca	1049
idinor	0:dcf3c92487ca	1050	case CI_MS_WINS1:
idinor	0:dcf3c92487ca	1051	case CI_MS_WINS2:
idinor	0:dcf3c92487ca	1052	/* Microsoft primary or secondary WINS request */
idinor	0:dcf3c92487ca	1053	d = citype == CI_MS_WINS2;
idinor	0:dcf3c92487ca	1054	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
idinor	0:dcf3c92487ca	1055
idinor	0:dcf3c92487ca	1056	/* If we do not have a DNS address then we cannot send it */
idinor	0:dcf3c92487ca	1057	if (ao->winsaddr[d] == 0 \|\|
idinor	0:dcf3c92487ca	1058	cilen != CILEN_ADDR) { /* Check CI length */
idinor	0:dcf3c92487ca	1059	orc = CONFREJ; /* Reject CI */
idinor	0:dcf3c92487ca	1060	break;
idinor	0:dcf3c92487ca	1061	}
idinor	0:dcf3c92487ca	1062	GETLONG(tl, p);
idinor	0:dcf3c92487ca	1063	if (htonl(tl) != ao->winsaddr[d]) {
idinor	0:dcf3c92487ca	1064	DECPTR(sizeof(u32_t), p);
idinor	0:dcf3c92487ca	1065	tl = ntohl(ao->winsaddr[d]);
idinor	0:dcf3c92487ca	1066	PUTLONG(tl, p);
idinor	0:dcf3c92487ca	1067	orc = CONFNAK;
idinor	0:dcf3c92487ca	1068	}
idinor	0:dcf3c92487ca	1069	break;
idinor	0:dcf3c92487ca	1070
idinor	0:dcf3c92487ca	1071	case CI_COMPRESSTYPE:
idinor	0:dcf3c92487ca	1072	if (!ao->neg_vj) {
idinor	0:dcf3c92487ca	1073	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
idinor	0:dcf3c92487ca	1074	orc = CONFREJ;
idinor	0:dcf3c92487ca	1075	break;
idinor	0:dcf3c92487ca	1076	} else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
idinor	0:dcf3c92487ca	1077	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
idinor	0:dcf3c92487ca	1078	orc = CONFREJ;
idinor	0:dcf3c92487ca	1079	break;
idinor	0:dcf3c92487ca	1080	}
idinor	0:dcf3c92487ca	1081	GETSHORT(cishort, p);
idinor	0:dcf3c92487ca	1082
idinor	0:dcf3c92487ca	1083	if (!(cishort == IPCP_VJ_COMP \|\|
idinor	0:dcf3c92487ca	1084	(cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
idinor	0:dcf3c92487ca	1085	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
idinor	0:dcf3c92487ca	1086	orc = CONFREJ;
idinor	0:dcf3c92487ca	1087	break;
idinor	0:dcf3c92487ca	1088	}
idinor	0:dcf3c92487ca	1089
idinor	0:dcf3c92487ca	1090	ho->neg_vj = 1;
idinor	0:dcf3c92487ca	1091	ho->vj_protocol = cishort;
idinor	0:dcf3c92487ca	1092	if (cilen == CILEN_VJ) {
idinor	0:dcf3c92487ca	1093	GETCHAR(maxslotindex, p);
idinor	0:dcf3c92487ca	1094	if (maxslotindex > ao->maxslotindex) {
idinor	0:dcf3c92487ca	1095	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
idinor	0:dcf3c92487ca	1096	orc = CONFNAK;
idinor	0:dcf3c92487ca	1097	if (!reject_if_disagree) {
idinor	0:dcf3c92487ca	1098	DECPTR(1, p);
idinor	0:dcf3c92487ca	1099	PUTCHAR(ao->maxslotindex, p);
idinor	0:dcf3c92487ca	1100	}
idinor	0:dcf3c92487ca	1101	}
idinor	0:dcf3c92487ca	1102	GETCHAR(cflag, p);
idinor	0:dcf3c92487ca	1103	if (cflag && !ao->cflag) {
idinor	0:dcf3c92487ca	1104	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
idinor	0:dcf3c92487ca	1105	orc = CONFNAK;
idinor	0:dcf3c92487ca	1106	if (!reject_if_disagree) {
idinor	0:dcf3c92487ca	1107	DECPTR(1, p);
idinor	0:dcf3c92487ca	1108	PUTCHAR(wo->cflag, p);
idinor	0:dcf3c92487ca	1109	}
idinor	0:dcf3c92487ca	1110	}
idinor	0:dcf3c92487ca	1111	ho->maxslotindex = maxslotindex;
idinor	0:dcf3c92487ca	1112	ho->cflag = cflag;
idinor	0:dcf3c92487ca	1113	} else {
idinor	0:dcf3c92487ca	1114	ho->old_vj = 1;
idinor	0:dcf3c92487ca	1115	ho->maxslotindex = MAX_SLOTS - 1;
idinor	0:dcf3c92487ca	1116	ho->cflag = 1;
idinor	0:dcf3c92487ca	1117	}
idinor	0:dcf3c92487ca	1118	IPCPDEBUG(LOG_INFO, (
idinor	0:dcf3c92487ca	1119	"ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
idinor	0:dcf3c92487ca	1120	ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
idinor	0:dcf3c92487ca	1121	break;
idinor	0:dcf3c92487ca	1122
idinor	0:dcf3c92487ca	1123	default:
idinor	0:dcf3c92487ca	1124	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
idinor	0:dcf3c92487ca	1125	orc = CONFREJ;
idinor	0:dcf3c92487ca	1126	break;
idinor	0:dcf3c92487ca	1127	}
idinor	0:dcf3c92487ca	1128
idinor	0:dcf3c92487ca	1129	endswitch:
idinor	0:dcf3c92487ca	1130	if (orc == CONFACK && /* Good CI */
idinor	0:dcf3c92487ca	1131	rc != CONFACK) { /* but prior CI wasnt? */
idinor	0:dcf3c92487ca	1132	continue; /* Don't send this one */
idinor	0:dcf3c92487ca	1133	}
idinor	0:dcf3c92487ca	1134
idinor	0:dcf3c92487ca	1135	if (orc == CONFNAK) { /* Nak this CI? */
idinor	0:dcf3c92487ca	1136	if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
idinor	0:dcf3c92487ca	1137	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
idinor	0:dcf3c92487ca	1138	orc = CONFREJ; /* Get tough if so */
idinor	0:dcf3c92487ca	1139	} else {
idinor	0:dcf3c92487ca	1140	if (rc == CONFREJ) { /* Rejecting prior CI? */
idinor	0:dcf3c92487ca	1141	continue; /* Don't send this one */
idinor	0:dcf3c92487ca	1142	}
idinor	0:dcf3c92487ca	1143	if (rc == CONFACK) { /* Ack'd all prior CIs? */
idinor	0:dcf3c92487ca	1144	rc = CONFNAK; /* Not anymore... */
idinor	0:dcf3c92487ca	1145	ucp = inp; /* Backup */
idinor	0:dcf3c92487ca	1146	}
idinor	0:dcf3c92487ca	1147	}
idinor	0:dcf3c92487ca	1148	}
idinor	0:dcf3c92487ca	1149
idinor	0:dcf3c92487ca	1150	if (orc == CONFREJ && /* Reject this CI */
idinor	0:dcf3c92487ca	1151	rc != CONFREJ) { /* but no prior ones? */
idinor	0:dcf3c92487ca	1152	rc = CONFREJ;
idinor	0:dcf3c92487ca	1153	ucp = inp; /* Backup */
idinor	0:dcf3c92487ca	1154	}
idinor	0:dcf3c92487ca	1155
idinor	0:dcf3c92487ca	1156	/* Need to move CI? */
idinor	0:dcf3c92487ca	1157	if (ucp != cip) {
idinor	0:dcf3c92487ca	1158	BCOPY(cip, ucp, cilen); /* Move it */
idinor	0:dcf3c92487ca	1159	}
idinor	0:dcf3c92487ca	1160
idinor	0:dcf3c92487ca	1161	/* Update output pointer */
idinor	0:dcf3c92487ca	1162	INCPTR(cilen, ucp);
idinor	0:dcf3c92487ca	1163	}
idinor	0:dcf3c92487ca	1164
idinor	0:dcf3c92487ca	1165	/*
idinor	0:dcf3c92487ca	1166	* If we aren't rejecting this packet, and we want to negotiate
idinor	0:dcf3c92487ca	1167	* their address, and they didn't send their address, then we
idinor	0:dcf3c92487ca	1168	* send a NAK with a CI_ADDR option appended. We assume the
idinor	0:dcf3c92487ca	1169	* input buffer is long enough that we can append the extra
idinor	0:dcf3c92487ca	1170	* option safely.
idinor	0:dcf3c92487ca	1171	*/
idinor	0:dcf3c92487ca	1172	if (rc != CONFREJ && !ho->neg_addr &&
idinor	0:dcf3c92487ca	1173	wo->req_addr && !reject_if_disagree) {
idinor	0:dcf3c92487ca	1174	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
idinor	0:dcf3c92487ca	1175	if (rc == CONFACK) {
idinor	0:dcf3c92487ca	1176	rc = CONFNAK;
idinor	0:dcf3c92487ca	1177	ucp = inp; /* reset pointer */
idinor	0:dcf3c92487ca	1178	wo->req_addr = 0; /* don't ask again */
idinor	0:dcf3c92487ca	1179	}
idinor	0:dcf3c92487ca	1180	PUTCHAR(CI_ADDR, ucp);
idinor	0:dcf3c92487ca	1181	PUTCHAR(CILEN_ADDR, ucp);
idinor	0:dcf3c92487ca	1182	tl = ntohl(wo->hisaddr);
idinor	0:dcf3c92487ca	1183	PUTLONG(tl, ucp);
idinor	0:dcf3c92487ca	1184	}
idinor	0:dcf3c92487ca	1185
idinor	0:dcf3c92487ca	1186	len = (int)(ucp - inp); / Compute output length */
idinor	0:dcf3c92487ca	1187	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
idinor	0:dcf3c92487ca	1188	return (rc); /* Return final code */
idinor	0:dcf3c92487ca	1189	}
idinor	0:dcf3c92487ca	1190
idinor	0:dcf3c92487ca	1191
idinor	0:dcf3c92487ca	1192	#if 0
idinor	0:dcf3c92487ca	1193	/*
idinor	0:dcf3c92487ca	1194	* ip_check_options - check that any IP-related options are OK,
idinor	0:dcf3c92487ca	1195	* and assign appropriate defaults.
idinor	0:dcf3c92487ca	1196	*/
idinor	0:dcf3c92487ca	1197	static void
idinor	0:dcf3c92487ca	1198	ip_check_options(u_long localAddr)
idinor	0:dcf3c92487ca	1199	{
idinor	0:dcf3c92487ca	1200	ipcp_options *wo = &ipcp_wantoptions[0];
idinor	0:dcf3c92487ca	1201
idinor	0:dcf3c92487ca	1202	/*
idinor	0:dcf3c92487ca	1203	* Load our default IP address but allow the remote host to give us
idinor	0:dcf3c92487ca	1204	* a new address.
idinor	0:dcf3c92487ca	1205	*/
idinor	0:dcf3c92487ca	1206	if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
idinor	0:dcf3c92487ca	1207	wo->accept_local = 1; /* don't insist on this default value */
idinor	0:dcf3c92487ca	1208	wo->ouraddr = htonl(localAddr);
idinor	0:dcf3c92487ca	1209	}
idinor	0:dcf3c92487ca	1210	}
idinor	0:dcf3c92487ca	1211	#endif
idinor	0:dcf3c92487ca	1212
idinor	0:dcf3c92487ca	1213
idinor	0:dcf3c92487ca	1214	/*
idinor	0:dcf3c92487ca	1215	* ipcp_up - IPCP has come UP.
idinor	0:dcf3c92487ca	1216	*
idinor	0:dcf3c92487ca	1217	* Configure the IP network interface appropriately and bring it up.
idinor	0:dcf3c92487ca	1218	*/
idinor	0:dcf3c92487ca	1219	static void
idinor	0:dcf3c92487ca	1220	ipcp_up(fsm *f)
idinor	0:dcf3c92487ca	1221	{
idinor	0:dcf3c92487ca	1222	u32_t mask;
idinor	0:dcf3c92487ca	1223	ipcp_options *ho = &ipcp_hisoptions[f->unit];
idinor	0:dcf3c92487ca	1224	ipcp_options *go = &ipcp_gotoptions[f->unit];
idinor	0:dcf3c92487ca	1225	ipcp_options *wo = &ipcp_wantoptions[f->unit];
idinor	0:dcf3c92487ca	1226
idinor	0:dcf3c92487ca	1227	np_up(f->unit, PPP_IP);
idinor	0:dcf3c92487ca	1228	IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
idinor	0:dcf3c92487ca	1229
idinor	0:dcf3c92487ca	1230	/*
idinor	0:dcf3c92487ca	1231	* We must have a non-zero IP address for both ends of the link.
idinor	0:dcf3c92487ca	1232	*/
idinor	0:dcf3c92487ca	1233	if (!ho->neg_addr) {
idinor	0:dcf3c92487ca	1234	ho->hisaddr = wo->hisaddr;
idinor	0:dcf3c92487ca	1235	}
idinor	0:dcf3c92487ca	1236	#ifdef __PPP_STRICT_IMPL__ //DG : Kludge for bad 3g providers PPP impl
idinor	0:dcf3c92487ca	1237	if (ho->hisaddr == 0) {
idinor	0:dcf3c92487ca	1238	IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
idinor	0:dcf3c92487ca	1239	ipcp_close(f->unit, "Could not determine remote IP address");
idinor	0:dcf3c92487ca	1240	return;
idinor	0:dcf3c92487ca	1241	}
idinor	0:dcf3c92487ca	1242	#endif
idinor	0:dcf3c92487ca	1243	if (go->ouraddr == 0) {
idinor	0:dcf3c92487ca	1244	IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
idinor	0:dcf3c92487ca	1245	ipcp_close(f->unit, "Could not determine local IP address");
idinor	0:dcf3c92487ca	1246	return;
idinor	0:dcf3c92487ca	1247	}
idinor	0:dcf3c92487ca	1248
idinor	0:dcf3c92487ca	1249	if (ppp_settings.usepeerdns && (go->dnsaddr[0] \|\| go->dnsaddr[1])) {
idinor	0:dcf3c92487ca	1250	/pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);/
idinor	0:dcf3c92487ca	1251	}
idinor	0:dcf3c92487ca	1252
idinor	0:dcf3c92487ca	1253	/*
idinor	0:dcf3c92487ca	1254	* Check that the peer is allowed to use the IP address it wants.
idinor	0:dcf3c92487ca	1255	*/
idinor	0:dcf3c92487ca	1256	if (!auth_ip_addr(f->unit, ho->hisaddr)) {
idinor	0:dcf3c92487ca	1257	IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
idinor	0:dcf3c92487ca	1258	inet_ntoa(ho->hisaddr)));
idinor	0:dcf3c92487ca	1259	ipcp_close(f->unit, "Unauthorized remote IP address");
idinor	0:dcf3c92487ca	1260	return;
idinor	0:dcf3c92487ca	1261	}
idinor	0:dcf3c92487ca	1262
idinor	0:dcf3c92487ca	1263	/* set tcp compression */
idinor	0:dcf3c92487ca	1264	sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
idinor	0:dcf3c92487ca	1265
idinor	0:dcf3c92487ca	1266	/*
idinor	0:dcf3c92487ca	1267	* Set IP addresses and (if specified) netmask.
idinor	0:dcf3c92487ca	1268	*/
idinor	0:dcf3c92487ca	1269	mask = GetMask(go->ouraddr);
idinor	0:dcf3c92487ca	1270
idinor	0:dcf3c92487ca	1271	if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
idinor	0:dcf3c92487ca	1272	IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
idinor	0:dcf3c92487ca	1273	ipcp_close(f->unit, "Interface configuration failed");
idinor	0:dcf3c92487ca	1274	return;
idinor	0:dcf3c92487ca	1275	}
idinor	0:dcf3c92487ca	1276
idinor	0:dcf3c92487ca	1277	/* bring the interface up for IP */
idinor	0:dcf3c92487ca	1278	if (!sifup(f->unit)) {
idinor	0:dcf3c92487ca	1279	IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
idinor	0:dcf3c92487ca	1280	ipcp_close(f->unit, "Interface configuration failed");
idinor	0:dcf3c92487ca	1281	return;
idinor	0:dcf3c92487ca	1282	}
idinor	0:dcf3c92487ca	1283
idinor	0:dcf3c92487ca	1284	sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
idinor	0:dcf3c92487ca	1285
idinor	0:dcf3c92487ca	1286	/* assign a default route through the interface if required */
idinor	0:dcf3c92487ca	1287	if (ipcp_wantoptions[f->unit].default_route) {
idinor	0:dcf3c92487ca	1288	if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
idinor	0:dcf3c92487ca	1289	default_route_set[f->unit] = 1;
idinor	0:dcf3c92487ca	1290	}
idinor	0:dcf3c92487ca	1291	}
idinor	0:dcf3c92487ca	1292
idinor	0:dcf3c92487ca	1293	IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
idinor	0:dcf3c92487ca	1294	IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
idinor	0:dcf3c92487ca	1295	if (go->dnsaddr[0]) {
idinor	0:dcf3c92487ca	1296	IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
idinor	0:dcf3c92487ca	1297	}
idinor	0:dcf3c92487ca	1298	if (go->dnsaddr[1]) {
idinor	0:dcf3c92487ca	1299	IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
idinor	0:dcf3c92487ca	1300	}
idinor	0:dcf3c92487ca	1301	}
idinor	0:dcf3c92487ca	1302
idinor	0:dcf3c92487ca	1303
idinor	0:dcf3c92487ca	1304	/*
idinor	0:dcf3c92487ca	1305	* ipcp_down - IPCP has gone DOWN.
idinor	0:dcf3c92487ca	1306	*
idinor	0:dcf3c92487ca	1307	* Take the IP network interface down, clear its addresses
idinor	0:dcf3c92487ca	1308	* and delete routes through it.
idinor	0:dcf3c92487ca	1309	*/
idinor	0:dcf3c92487ca	1310	static void
idinor	0:dcf3c92487ca	1311	ipcp_down(fsm *f)
idinor	0:dcf3c92487ca	1312	{
idinor	0:dcf3c92487ca	1313	IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
idinor	0:dcf3c92487ca	1314	np_down(f->unit, PPP_IP);
idinor	0:dcf3c92487ca	1315	sifvjcomp(f->unit, 0, 0, 0);
idinor	0:dcf3c92487ca	1316
idinor	0:dcf3c92487ca	1317	sifdown(f->unit);
idinor	0:dcf3c92487ca	1318	ipcp_clear_addrs(f->unit);
idinor	0:dcf3c92487ca	1319	}
idinor	0:dcf3c92487ca	1320
idinor	0:dcf3c92487ca	1321
idinor	0:dcf3c92487ca	1322	/*
idinor	0:dcf3c92487ca	1323	* ipcp_clear_addrs() - clear the interface addresses, routes, etc.
idinor	0:dcf3c92487ca	1324	*/
idinor	0:dcf3c92487ca	1325	static void
idinor	0:dcf3c92487ca	1326	ipcp_clear_addrs(int unit)
idinor	0:dcf3c92487ca	1327	{
idinor	0:dcf3c92487ca	1328	u32_t ouraddr, hisaddr;
idinor	0:dcf3c92487ca	1329
idinor	0:dcf3c92487ca	1330	ouraddr = ipcp_gotoptions[unit].ouraddr;
idinor	0:dcf3c92487ca	1331	hisaddr = ipcp_hisoptions[unit].hisaddr;
idinor	0:dcf3c92487ca	1332	if (default_route_set[unit]) {
idinor	0:dcf3c92487ca	1333	cifdefaultroute(unit, ouraddr, hisaddr);
idinor	0:dcf3c92487ca	1334	default_route_set[unit] = 0;
idinor	0:dcf3c92487ca	1335	}
idinor	0:dcf3c92487ca	1336	cifaddr(unit, ouraddr, hisaddr);
idinor	0:dcf3c92487ca	1337	}
idinor	0:dcf3c92487ca	1338
idinor	0:dcf3c92487ca	1339
idinor	0:dcf3c92487ca	1340	/*
idinor	0:dcf3c92487ca	1341	* ipcp_finished - possibly shut down the lower layers.
idinor	0:dcf3c92487ca	1342	*/
idinor	0:dcf3c92487ca	1343	static void
idinor	0:dcf3c92487ca	1344	ipcp_finished(fsm *f)
idinor	0:dcf3c92487ca	1345	{
idinor	0:dcf3c92487ca	1346	np_finished(f->unit, PPP_IP);
idinor	0:dcf3c92487ca	1347	}
idinor	0:dcf3c92487ca	1348
idinor	0:dcf3c92487ca	1349	#if PPP_ADDITIONAL_CALLBACKS
idinor	0:dcf3c92487ca	1350	static int
idinor	0:dcf3c92487ca	1351	ipcp_printpkt(u_char p, int plen, void (printer) (void , char , ...), void *arg)
idinor	0:dcf3c92487ca	1352	{
idinor	0:dcf3c92487ca	1353	LWIP_UNUSED_ARG(p);
idinor	0:dcf3c92487ca	1354	LWIP_UNUSED_ARG(plen);
idinor	0:dcf3c92487ca	1355	LWIP_UNUSED_ARG(printer);
idinor	0:dcf3c92487ca	1356	LWIP_UNUSED_ARG(arg);
idinor	0:dcf3c92487ca	1357	return 0;
idinor	0:dcf3c92487ca	1358	}
idinor	0:dcf3c92487ca	1359
idinor	0:dcf3c92487ca	1360	/*
idinor	0:dcf3c92487ca	1361	* ip_active_pkt - see if this IP packet is worth bringing the link up for.
idinor	0:dcf3c92487ca	1362	* We don't bring the link up for IP fragments or for TCP FIN packets
idinor	0:dcf3c92487ca	1363	* with no data.
idinor	0:dcf3c92487ca	1364	*/
idinor	0:dcf3c92487ca	1365	#define IP_HDRLEN 20 /* bytes */
idinor	0:dcf3c92487ca	1366	#define IP_OFFMASK 0x1fff
idinor	0:dcf3c92487ca	1367	#define IPPROTO_TCP 6
idinor	0:dcf3c92487ca	1368	#define TCP_HDRLEN 20
idinor	0:dcf3c92487ca	1369	#define TH_FIN 0x01
idinor	0:dcf3c92487ca	1370
idinor	0:dcf3c92487ca	1371	/*
idinor	0:dcf3c92487ca	1372	* We use these macros because the IP header may be at an odd address,
idinor	0:dcf3c92487ca	1373	* and some compilers might use word loads to get th_off or ip_hl.
idinor	0:dcf3c92487ca	1374	*/
idinor	0:dcf3c92487ca	1375
idinor	0:dcf3c92487ca	1376	#define net_short(x) (((x)[0] << 8) + (x)[1])
idinor	0:dcf3c92487ca	1377	#define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
idinor	0:dcf3c92487ca	1378	#define get_ipoff(x) net_short((unsigned char *)(x) + 6)
idinor	0:dcf3c92487ca	1379	#define get_ipproto(x) (((unsigned char *)(x))[9])
idinor	0:dcf3c92487ca	1380	#define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
idinor	0:dcf3c92487ca	1381	#define get_tcpflags(x) (((unsigned char *)(x))[13])
idinor	0:dcf3c92487ca	1382
idinor	0:dcf3c92487ca	1383	static int
idinor	0:dcf3c92487ca	1384	ip_active_pkt(u_char *pkt, int len)
idinor	0:dcf3c92487ca	1385	{
idinor	0:dcf3c92487ca	1386	u_char *tcp;
idinor	0:dcf3c92487ca	1387	int hlen;
idinor	0:dcf3c92487ca	1388
idinor	0:dcf3c92487ca	1389	len -= PPP_HDRLEN;
idinor	0:dcf3c92487ca	1390	pkt += PPP_HDRLEN;
idinor	0:dcf3c92487ca	1391	if (len < IP_HDRLEN) {
idinor	0:dcf3c92487ca	1392	return 0;
idinor	0:dcf3c92487ca	1393	}
idinor	0:dcf3c92487ca	1394	if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
idinor	0:dcf3c92487ca	1395	return 0;
idinor	0:dcf3c92487ca	1396	}
idinor	0:dcf3c92487ca	1397	if (get_ipproto(pkt) != IPPROTO_TCP) {
idinor	0:dcf3c92487ca	1398	return 1;
idinor	0:dcf3c92487ca	1399	}
idinor	0:dcf3c92487ca	1400	hlen = get_iphl(pkt) * 4;
idinor	0:dcf3c92487ca	1401	if (len < hlen + TCP_HDRLEN) {
idinor	0:dcf3c92487ca	1402	return 0;
idinor	0:dcf3c92487ca	1403	}
idinor	0:dcf3c92487ca	1404	tcp = pkt + hlen;
idinor	0:dcf3c92487ca	1405	if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
idinor	0:dcf3c92487ca	1406	return 0;
idinor	0:dcf3c92487ca	1407	}
idinor	0:dcf3c92487ca	1408	return 1;
idinor	0:dcf3c92487ca	1409	}
idinor	0:dcf3c92487ca	1410	#endif /* PPP_ADDITIONAL_CALLBACKS */
idinor	0:dcf3c92487ca	1411
idinor	0:dcf3c92487ca	1412	#endif /* PPP_SUPPORT */

Repository toolbox

Export to desktop IDE

Repository details

Type:	Library
Created:	20 Jul 2011
Imports:	35
Forks:	0
Commits:	1
Dependents:	1
Dependencies:	0
Followers:	1

lwip/netif/ppp/ipcp.c@0:dcf3c92487ca, 2011-07-20 (annotated)

Who changed what in which revision?

Repository toolbox

Repository details

Important Information for this Arm website

Access Warning