BF_Websocket

Users » bfictorie » Code » BF_Websocket

Brandon Fictorie / Mbed 2 deprecated BF_Websocket

NetServices/lwip/netif/ppp/ipcp.c@0:8cdad1c73e8e, 2012-03-25 (annotated)

Committer:: bfictorie
Date:: Sun Mar 25 17:26:30 2012 +0000
Revision:: 0:8cdad1c73e8e

Who changed what in which revision?

User	Revision	Line number	New contents of line
bfictorie	0:8cdad1c73e8e	1	/** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
bfictorie	0:8cdad1c73e8e	2	dial-on-demand has been stripped. */
bfictorie	0:8cdad1c73e8e	3	/*****************************************************************************
bfictorie	0:8cdad1c73e8e	4	* ipcp.c - Network PPP IP Control Protocol program file.
bfictorie	0:8cdad1c73e8e	5	*
bfictorie	0:8cdad1c73e8e	6	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
bfictorie	0:8cdad1c73e8e	7	* portions Copyright (c) 1997 by Global Election Systems Inc.
bfictorie	0:8cdad1c73e8e	8	*
bfictorie	0:8cdad1c73e8e	9	* The authors hereby grant permission to use, copy, modify, distribute,
bfictorie	0:8cdad1c73e8e	10	* and license this software and its documentation for any purpose, provided
bfictorie	0:8cdad1c73e8e	11	* that existing copyright notices are retained in all copies and that this
bfictorie	0:8cdad1c73e8e	12	* notice and the following disclaimer are included verbatim in any
bfictorie	0:8cdad1c73e8e	13	* distributions. No written agreement, license, or royalty fee is required
bfictorie	0:8cdad1c73e8e	14	* for any of the authorized uses.
bfictorie	0:8cdad1c73e8e	15	*
bfictorie	0:8cdad1c73e8e	16	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
bfictorie	0:8cdad1c73e8e	17	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
bfictorie	0:8cdad1c73e8e	18	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
bfictorie	0:8cdad1c73e8e	19	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
bfictorie	0:8cdad1c73e8e	20	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
bfictorie	0:8cdad1c73e8e	21	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
bfictorie	0:8cdad1c73e8e	22	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
bfictorie	0:8cdad1c73e8e	23	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
bfictorie	0:8cdad1c73e8e	24	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
bfictorie	0:8cdad1c73e8e	25	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bfictorie	0:8cdad1c73e8e	26	*
bfictorie	0:8cdad1c73e8e	27	******************************************************************************
bfictorie	0:8cdad1c73e8e	28	* REVISION HISTORY
bfictorie	0:8cdad1c73e8e	29	*
bfictorie	0:8cdad1c73e8e	30	* 03-01-01 Marc Boucher <marc@mbsi.ca>
bfictorie	0:8cdad1c73e8e	31	* Ported to lwIP.
bfictorie	0:8cdad1c73e8e	32	* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
bfictorie	0:8cdad1c73e8e	33	* Original.
bfictorie	0:8cdad1c73e8e	34	*****************************************************************************/
bfictorie	0:8cdad1c73e8e	35	/*
bfictorie	0:8cdad1c73e8e	36	* ipcp.c - PPP IP Control Protocol.
bfictorie	0:8cdad1c73e8e	37	*
bfictorie	0:8cdad1c73e8e	38	* Copyright (c) 1989 Carnegie Mellon University.
bfictorie	0:8cdad1c73e8e	39	* All rights reserved.
bfictorie	0:8cdad1c73e8e	40	*
bfictorie	0:8cdad1c73e8e	41	* Redistribution and use in source and binary forms are permitted
bfictorie	0:8cdad1c73e8e	42	* provided that the above copyright notice and this paragraph are
bfictorie	0:8cdad1c73e8e	43	* duplicated in all such forms and that any documentation,
bfictorie	0:8cdad1c73e8e	44	* advertising materials, and other materials related to such
bfictorie	0:8cdad1c73e8e	45	* distribution and use acknowledge that the software was developed
bfictorie	0:8cdad1c73e8e	46	* by Carnegie Mellon University. The name of the
bfictorie	0:8cdad1c73e8e	47	* University may not be used to endorse or promote products derived
bfictorie	0:8cdad1c73e8e	48	* from this software without specific prior written permission.
bfictorie	0:8cdad1c73e8e	49	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
bfictorie	0:8cdad1c73e8e	50	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
bfictorie	0:8cdad1c73e8e	51	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
bfictorie	0:8cdad1c73e8e	52	*/
bfictorie	0:8cdad1c73e8e	53
bfictorie	0:8cdad1c73e8e	54	#include "lwip/opt.h"
bfictorie	0:8cdad1c73e8e	55
bfictorie	0:8cdad1c73e8e	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
bfictorie	0:8cdad1c73e8e	57
bfictorie	0:8cdad1c73e8e	58	#include "ppp.h"
bfictorie	0:8cdad1c73e8e	59	#include "pppdebug.h"
bfictorie	0:8cdad1c73e8e	60
bfictorie	0:8cdad1c73e8e	61	#include "auth.h"
bfictorie	0:8cdad1c73e8e	62	#include "fsm.h"
bfictorie	0:8cdad1c73e8e	63	#include "vj.h"
bfictorie	0:8cdad1c73e8e	64	#include "ipcp.h"
bfictorie	0:8cdad1c73e8e	65
bfictorie	0:8cdad1c73e8e	66	#include "lwip/inet.h"
bfictorie	0:8cdad1c73e8e	67
bfictorie	0:8cdad1c73e8e	68	#include <string.h>
bfictorie	0:8cdad1c73e8e	69
bfictorie	0:8cdad1c73e8e	70	/* #define OLD_CI_ADDRS 1 / / Support deprecated address negotiation. */
bfictorie	0:8cdad1c73e8e	71
bfictorie	0:8cdad1c73e8e	72	/* global vars */
bfictorie	0:8cdad1c73e8e	73	ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
bfictorie	0:8cdad1c73e8e	74	ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
bfictorie	0:8cdad1c73e8e	75	ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
bfictorie	0:8cdad1c73e8e	76	ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
bfictorie	0:8cdad1c73e8e	77
bfictorie	0:8cdad1c73e8e	78	/* local vars */
bfictorie	0:8cdad1c73e8e	79	static int default_route_set[NUM_PPP]; /* Have set up a default route */
bfictorie	0:8cdad1c73e8e	80	static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
bfictorie	0:8cdad1c73e8e	81
bfictorie	0:8cdad1c73e8e	82
bfictorie	0:8cdad1c73e8e	83	/*
bfictorie	0:8cdad1c73e8e	84	* Callbacks for fsm code. (CI = Configuration Information)
bfictorie	0:8cdad1c73e8e	85	*/
bfictorie	0:8cdad1c73e8e	86	static void ipcp_resetci (fsm ); / Reset our CI */
bfictorie	0:8cdad1c73e8e	87	static int ipcp_cilen (fsm ); / Return length of our CI */
bfictorie	0:8cdad1c73e8e	88	static void ipcp_addci (fsm , u_char , int ); / Add our CI */
bfictorie	0:8cdad1c73e8e	89	static int ipcp_ackci (fsm , u_char , int); /* Peer ack'd our CI */
bfictorie	0:8cdad1c73e8e	90	static int ipcp_nakci (fsm , u_char , int); /* Peer nak'd our CI */
bfictorie	0:8cdad1c73e8e	91	static int ipcp_rejci (fsm , u_char , int); /* Peer rej'd our CI */
bfictorie	0:8cdad1c73e8e	92	static int ipcp_reqci (fsm , u_char , int , int); / Rcv CI */
bfictorie	0:8cdad1c73e8e	93	static void ipcp_up (fsm ); / We're UP */
bfictorie	0:8cdad1c73e8e	94	static void ipcp_down (fsm ); / We're DOWN */
bfictorie	0:8cdad1c73e8e	95	#if PPP_ADDITIONAL_CALLBACKS
bfictorie	0:8cdad1c73e8e	96	static void ipcp_script (fsm , char ); /* Run an up/down script */
bfictorie	0:8cdad1c73e8e	97	#endif
bfictorie	0:8cdad1c73e8e	98	static void ipcp_finished (fsm ); / Don't need lower layer */
bfictorie	0:8cdad1c73e8e	99
bfictorie	0:8cdad1c73e8e	100
bfictorie	0:8cdad1c73e8e	101	fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
bfictorie	0:8cdad1c73e8e	102
bfictorie	0:8cdad1c73e8e	103
bfictorie	0:8cdad1c73e8e	104	static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
bfictorie	0:8cdad1c73e8e	105	ipcp_resetci, /* Reset our Configuration Information */
bfictorie	0:8cdad1c73e8e	106	ipcp_cilen, /* Length of our Configuration Information */
bfictorie	0:8cdad1c73e8e	107	ipcp_addci, /* Add our Configuration Information */
bfictorie	0:8cdad1c73e8e	108	ipcp_ackci, /* ACK our Configuration Information */
bfictorie	0:8cdad1c73e8e	109	ipcp_nakci, /* NAK our Configuration Information */
bfictorie	0:8cdad1c73e8e	110	ipcp_rejci, /* Reject our Configuration Information */
bfictorie	0:8cdad1c73e8e	111	ipcp_reqci, /* Request peer's Configuration Information */
bfictorie	0:8cdad1c73e8e	112	ipcp_up, /* Called when fsm reaches LS_OPENED state */
bfictorie	0:8cdad1c73e8e	113	ipcp_down, /* Called when fsm leaves LS_OPENED state */
bfictorie	0:8cdad1c73e8e	114	NULL, /* Called when we want the lower layer up */
bfictorie	0:8cdad1c73e8e	115	ipcp_finished, /* Called when we want the lower layer down */
bfictorie	0:8cdad1c73e8e	116	NULL, /* Called when Protocol-Reject received */
bfictorie	0:8cdad1c73e8e	117	NULL, /* Retransmission is necessary */
bfictorie	0:8cdad1c73e8e	118	NULL, /* Called to handle protocol-specific codes */
bfictorie	0:8cdad1c73e8e	119	"IPCP" /* String name of protocol */
bfictorie	0:8cdad1c73e8e	120	};
bfictorie	0:8cdad1c73e8e	121
bfictorie	0:8cdad1c73e8e	122	/*
bfictorie	0:8cdad1c73e8e	123	* Protocol entry points from main code.
bfictorie	0:8cdad1c73e8e	124	*/
bfictorie	0:8cdad1c73e8e	125	static void ipcp_init (int);
bfictorie	0:8cdad1c73e8e	126	static void ipcp_open (int);
bfictorie	0:8cdad1c73e8e	127	static void ipcp_close (int, char *);
bfictorie	0:8cdad1c73e8e	128	static void ipcp_lowerup (int);
bfictorie	0:8cdad1c73e8e	129	static void ipcp_lowerdown (int);
bfictorie	0:8cdad1c73e8e	130	static void ipcp_input (int, u_char *, int);
bfictorie	0:8cdad1c73e8e	131	static void ipcp_protrej (int);
bfictorie	0:8cdad1c73e8e	132
bfictorie	0:8cdad1c73e8e	133
bfictorie	0:8cdad1c73e8e	134	struct protent ipcp_protent = {
bfictorie	0:8cdad1c73e8e	135	PPP_IPCP,
bfictorie	0:8cdad1c73e8e	136	ipcp_init,
bfictorie	0:8cdad1c73e8e	137	ipcp_input,
bfictorie	0:8cdad1c73e8e	138	ipcp_protrej,
bfictorie	0:8cdad1c73e8e	139	ipcp_lowerup,
bfictorie	0:8cdad1c73e8e	140	ipcp_lowerdown,
bfictorie	0:8cdad1c73e8e	141	ipcp_open,
bfictorie	0:8cdad1c73e8e	142	ipcp_close,
bfictorie	0:8cdad1c73e8e	143	#if PPP_ADDITIONAL_CALLBACKS
bfictorie	0:8cdad1c73e8e	144	ipcp_printpkt,
bfictorie	0:8cdad1c73e8e	145	NULL,
bfictorie	0:8cdad1c73e8e	146	#endif /* PPP_ADDITIONAL_CALLBACKS */
bfictorie	0:8cdad1c73e8e	147	1,
bfictorie	0:8cdad1c73e8e	148	"IPCP",
bfictorie	0:8cdad1c73e8e	149	#if PPP_ADDITIONAL_CALLBACKS
bfictorie	0:8cdad1c73e8e	150	ip_check_options,
bfictorie	0:8cdad1c73e8e	151	NULL,
bfictorie	0:8cdad1c73e8e	152	ip_active_pkt
bfictorie	0:8cdad1c73e8e	153	#endif /* PPP_ADDITIONAL_CALLBACKS */
bfictorie	0:8cdad1c73e8e	154	};
bfictorie	0:8cdad1c73e8e	155
bfictorie	0:8cdad1c73e8e	156	static void ipcp_clear_addrs (int);
bfictorie	0:8cdad1c73e8e	157
bfictorie	0:8cdad1c73e8e	158	/*
bfictorie	0:8cdad1c73e8e	159	* Lengths of configuration options.
bfictorie	0:8cdad1c73e8e	160	*/
bfictorie	0:8cdad1c73e8e	161	#define CILEN_VOID 2
bfictorie	0:8cdad1c73e8e	162	#define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
bfictorie	0:8cdad1c73e8e	163	#define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
bfictorie	0:8cdad1c73e8e	164	#define CILEN_ADDR 6 /* new-style single address option */
bfictorie	0:8cdad1c73e8e	165	#define CILEN_ADDRS 10 /* old-style dual address option */
bfictorie	0:8cdad1c73e8e	166
bfictorie	0:8cdad1c73e8e	167
bfictorie	0:8cdad1c73e8e	168	#define CODENAME(x) ((x) == CONFACK ? "ACK" : \
bfictorie	0:8cdad1c73e8e	169	(x) == CONFNAK ? "NAK" : "REJ")
bfictorie	0:8cdad1c73e8e	170
bfictorie	0:8cdad1c73e8e	171
bfictorie	0:8cdad1c73e8e	172	/*
bfictorie	0:8cdad1c73e8e	173	* ipcp_init - Initialize IPCP.
bfictorie	0:8cdad1c73e8e	174	*/
bfictorie	0:8cdad1c73e8e	175	static void
bfictorie	0:8cdad1c73e8e	176	ipcp_init(int unit)
bfictorie	0:8cdad1c73e8e	177	{
bfictorie	0:8cdad1c73e8e	178	fsm *f = &ipcp_fsm[unit];
bfictorie	0:8cdad1c73e8e	179	ipcp_options *wo = &ipcp_wantoptions[unit];
bfictorie	0:8cdad1c73e8e	180	ipcp_options *ao = &ipcp_allowoptions[unit];
bfictorie	0:8cdad1c73e8e	181
bfictorie	0:8cdad1c73e8e	182	f->unit = unit;
bfictorie	0:8cdad1c73e8e	183	f->protocol = PPP_IPCP;
bfictorie	0:8cdad1c73e8e	184	f->callbacks = &ipcp_callbacks;
bfictorie	0:8cdad1c73e8e	185	fsm_init(&ipcp_fsm[unit]);
bfictorie	0:8cdad1c73e8e	186
bfictorie	0:8cdad1c73e8e	187	memset(wo, 0, sizeof(*wo));
bfictorie	0:8cdad1c73e8e	188	memset(ao, 0, sizeof(*ao));
bfictorie	0:8cdad1c73e8e	189
bfictorie	0:8cdad1c73e8e	190	wo->neg_addr = 1;
bfictorie	0:8cdad1c73e8e	191	wo->ouraddr = 0;
bfictorie	0:8cdad1c73e8e	192	#if VJ_SUPPORT
bfictorie	0:8cdad1c73e8e	193	wo->neg_vj = 1;
bfictorie	0:8cdad1c73e8e	194	#else /* VJ_SUPPORT */
bfictorie	0:8cdad1c73e8e	195	wo->neg_vj = 0;
bfictorie	0:8cdad1c73e8e	196	#endif /* VJ_SUPPORT */
bfictorie	0:8cdad1c73e8e	197	wo->vj_protocol = IPCP_VJ_COMP;
bfictorie	0:8cdad1c73e8e	198	wo->maxslotindex = MAX_SLOTS - 1;
bfictorie	0:8cdad1c73e8e	199	wo->cflag = 0;
bfictorie	0:8cdad1c73e8e	200	wo->default_route = 1;
bfictorie	0:8cdad1c73e8e	201
bfictorie	0:8cdad1c73e8e	202	ao->neg_addr = 1;
bfictorie	0:8cdad1c73e8e	203	#if VJ_SUPPORT
bfictorie	0:8cdad1c73e8e	204	ao->neg_vj = 1;
bfictorie	0:8cdad1c73e8e	205	#else /* VJ_SUPPORT */
bfictorie	0:8cdad1c73e8e	206	ao->neg_vj = 0;
bfictorie	0:8cdad1c73e8e	207	#endif /* VJ_SUPPORT */
bfictorie	0:8cdad1c73e8e	208	ao->maxslotindex = MAX_SLOTS - 1;
bfictorie	0:8cdad1c73e8e	209	ao->cflag = 1;
bfictorie	0:8cdad1c73e8e	210	ao->default_route = 1;
bfictorie	0:8cdad1c73e8e	211	}
bfictorie	0:8cdad1c73e8e	212
bfictorie	0:8cdad1c73e8e	213
bfictorie	0:8cdad1c73e8e	214	/*
bfictorie	0:8cdad1c73e8e	215	* ipcp_open - IPCP is allowed to come up.
bfictorie	0:8cdad1c73e8e	216	*/
bfictorie	0:8cdad1c73e8e	217	static void
bfictorie	0:8cdad1c73e8e	218	ipcp_open(int unit)
bfictorie	0:8cdad1c73e8e	219	{
bfictorie	0:8cdad1c73e8e	220	fsm_open(&ipcp_fsm[unit]);
bfictorie	0:8cdad1c73e8e	221	}
bfictorie	0:8cdad1c73e8e	222
bfictorie	0:8cdad1c73e8e	223
bfictorie	0:8cdad1c73e8e	224	/*
bfictorie	0:8cdad1c73e8e	225	* ipcp_close - Take IPCP down.
bfictorie	0:8cdad1c73e8e	226	*/
bfictorie	0:8cdad1c73e8e	227	static void
bfictorie	0:8cdad1c73e8e	228	ipcp_close(int unit, char *reason)
bfictorie	0:8cdad1c73e8e	229	{
bfictorie	0:8cdad1c73e8e	230	fsm_close(&ipcp_fsm[unit], reason);
bfictorie	0:8cdad1c73e8e	231	}
bfictorie	0:8cdad1c73e8e	232
bfictorie	0:8cdad1c73e8e	233
bfictorie	0:8cdad1c73e8e	234	/*
bfictorie	0:8cdad1c73e8e	235	* ipcp_lowerup - The lower layer is up.
bfictorie	0:8cdad1c73e8e	236	*/
bfictorie	0:8cdad1c73e8e	237	static void
bfictorie	0:8cdad1c73e8e	238	ipcp_lowerup(int unit)
bfictorie	0:8cdad1c73e8e	239	{
bfictorie	0:8cdad1c73e8e	240	fsm_lowerup(&ipcp_fsm[unit]);
bfictorie	0:8cdad1c73e8e	241	}
bfictorie	0:8cdad1c73e8e	242
bfictorie	0:8cdad1c73e8e	243
bfictorie	0:8cdad1c73e8e	244	/*
bfictorie	0:8cdad1c73e8e	245	* ipcp_lowerdown - The lower layer is down.
bfictorie	0:8cdad1c73e8e	246	*/
bfictorie	0:8cdad1c73e8e	247	static void
bfictorie	0:8cdad1c73e8e	248	ipcp_lowerdown(int unit)
bfictorie	0:8cdad1c73e8e	249	{
bfictorie	0:8cdad1c73e8e	250	fsm_lowerdown(&ipcp_fsm[unit]);
bfictorie	0:8cdad1c73e8e	251	}
bfictorie	0:8cdad1c73e8e	252
bfictorie	0:8cdad1c73e8e	253
bfictorie	0:8cdad1c73e8e	254	/*
bfictorie	0:8cdad1c73e8e	255	* ipcp_input - Input IPCP packet.
bfictorie	0:8cdad1c73e8e	256	*/
bfictorie	0:8cdad1c73e8e	257	static void
bfictorie	0:8cdad1c73e8e	258	ipcp_input(int unit, u_char *p, int len)
bfictorie	0:8cdad1c73e8e	259	{
bfictorie	0:8cdad1c73e8e	260	fsm_input(&ipcp_fsm[unit], p, len);
bfictorie	0:8cdad1c73e8e	261	}
bfictorie	0:8cdad1c73e8e	262
bfictorie	0:8cdad1c73e8e	263
bfictorie	0:8cdad1c73e8e	264	/*
bfictorie	0:8cdad1c73e8e	265	* ipcp_protrej - A Protocol-Reject was received for IPCP.
bfictorie	0:8cdad1c73e8e	266	*
bfictorie	0:8cdad1c73e8e	267	* Pretend the lower layer went down, so we shut up.
bfictorie	0:8cdad1c73e8e	268	*/
bfictorie	0:8cdad1c73e8e	269	static void
bfictorie	0:8cdad1c73e8e	270	ipcp_protrej(int unit)
bfictorie	0:8cdad1c73e8e	271	{
bfictorie	0:8cdad1c73e8e	272	fsm_lowerdown(&ipcp_fsm[unit]);
bfictorie	0:8cdad1c73e8e	273	}
bfictorie	0:8cdad1c73e8e	274
bfictorie	0:8cdad1c73e8e	275
bfictorie	0:8cdad1c73e8e	276	/*
bfictorie	0:8cdad1c73e8e	277	* ipcp_resetci - Reset our CI.
bfictorie	0:8cdad1c73e8e	278	*/
bfictorie	0:8cdad1c73e8e	279	static void
bfictorie	0:8cdad1c73e8e	280	ipcp_resetci(fsm *f)
bfictorie	0:8cdad1c73e8e	281	{
bfictorie	0:8cdad1c73e8e	282	ipcp_options *wo = &ipcp_wantoptions[f->unit];
bfictorie	0:8cdad1c73e8e	283
bfictorie	0:8cdad1c73e8e	284	wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
bfictorie	0:8cdad1c73e8e	285	if (wo->ouraddr == 0) {
bfictorie	0:8cdad1c73e8e	286	wo->accept_local = 1;
bfictorie	0:8cdad1c73e8e	287	}
bfictorie	0:8cdad1c73e8e	288	if (wo->hisaddr == 0) {
bfictorie	0:8cdad1c73e8e	289	wo->accept_remote = 1;
bfictorie	0:8cdad1c73e8e	290	}
bfictorie	0:8cdad1c73e8e	291	/* Request DNS addresses from the peer */
bfictorie	0:8cdad1c73e8e	292	wo->req_dns1 = ppp_settings.usepeerdns;
bfictorie	0:8cdad1c73e8e	293	wo->req_dns2 = ppp_settings.usepeerdns;
bfictorie	0:8cdad1c73e8e	294	ipcp_gotoptions[f->unit] = *wo;
bfictorie	0:8cdad1c73e8e	295	cis_received[f->unit] = 0;
bfictorie	0:8cdad1c73e8e	296	}
bfictorie	0:8cdad1c73e8e	297
bfictorie	0:8cdad1c73e8e	298
bfictorie	0:8cdad1c73e8e	299	/*
bfictorie	0:8cdad1c73e8e	300	* ipcp_cilen - Return length of our CI.
bfictorie	0:8cdad1c73e8e	301	*/
bfictorie	0:8cdad1c73e8e	302	static int
bfictorie	0:8cdad1c73e8e	303	ipcp_cilen(fsm *f)
bfictorie	0:8cdad1c73e8e	304	{
bfictorie	0:8cdad1c73e8e	305	ipcp_options *go = &ipcp_gotoptions[f->unit];
bfictorie	0:8cdad1c73e8e	306	ipcp_options *wo = &ipcp_wantoptions[f->unit];
bfictorie	0:8cdad1c73e8e	307	ipcp_options *ho = &ipcp_hisoptions[f->unit];
bfictorie	0:8cdad1c73e8e	308
bfictorie	0:8cdad1c73e8e	309	#define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
bfictorie	0:8cdad1c73e8e	310	#define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
bfictorie	0:8cdad1c73e8e	311	#define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
bfictorie	0:8cdad1c73e8e	312
bfictorie	0:8cdad1c73e8e	313	/*
bfictorie	0:8cdad1c73e8e	314	* First see if we want to change our options to the old
bfictorie	0:8cdad1c73e8e	315	* forms because we have received old forms from the peer.
bfictorie	0:8cdad1c73e8e	316	*/
bfictorie	0:8cdad1c73e8e	317	if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
bfictorie	0:8cdad1c73e8e	318	/* use the old style of address negotiation */
bfictorie	0:8cdad1c73e8e	319	go->neg_addr = 1;
bfictorie	0:8cdad1c73e8e	320	go->old_addrs = 1;
bfictorie	0:8cdad1c73e8e	321	}
bfictorie	0:8cdad1c73e8e	322	if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
bfictorie	0:8cdad1c73e8e	323	/* try an older style of VJ negotiation */
bfictorie	0:8cdad1c73e8e	324	if (cis_received[f->unit] == 0) {
bfictorie	0:8cdad1c73e8e	325	/* keep trying the new style until we see some CI from the peer */
bfictorie	0:8cdad1c73e8e	326	go->neg_vj = 1;
bfictorie	0:8cdad1c73e8e	327	} else {
bfictorie	0:8cdad1c73e8e	328	/* use the old style only if the peer did */
bfictorie	0:8cdad1c73e8e	329	if (ho->neg_vj && ho->old_vj) {
bfictorie	0:8cdad1c73e8e	330	go->neg_vj = 1;
bfictorie	0:8cdad1c73e8e	331	go->old_vj = 1;
bfictorie	0:8cdad1c73e8e	332	go->vj_protocol = ho->vj_protocol;
bfictorie	0:8cdad1c73e8e	333	}
bfictorie	0:8cdad1c73e8e	334	}
bfictorie	0:8cdad1c73e8e	335	}
bfictorie	0:8cdad1c73e8e	336
bfictorie	0:8cdad1c73e8e	337	return (LENCIADDR(go->neg_addr, go->old_addrs) +
bfictorie	0:8cdad1c73e8e	338	LENCIVJ(go->neg_vj, go->old_vj) +
bfictorie	0:8cdad1c73e8e	339	LENCIDNS(go->req_dns1) +
bfictorie	0:8cdad1c73e8e	340	LENCIDNS(go->req_dns2));
bfictorie	0:8cdad1c73e8e	341	}
bfictorie	0:8cdad1c73e8e	342
bfictorie	0:8cdad1c73e8e	343
bfictorie	0:8cdad1c73e8e	344	/*
bfictorie	0:8cdad1c73e8e	345	* ipcp_addci - Add our desired CIs to a packet.
bfictorie	0:8cdad1c73e8e	346	*/
bfictorie	0:8cdad1c73e8e	347	static void
bfictorie	0:8cdad1c73e8e	348	ipcp_addci(fsm f, u_char ucp, int *lenp)
bfictorie	0:8cdad1c73e8e	349	{
bfictorie	0:8cdad1c73e8e	350	ipcp_options *go = &ipcp_gotoptions[f->unit];
bfictorie	0:8cdad1c73e8e	351	int len = *lenp;
bfictorie	0:8cdad1c73e8e	352
bfictorie	0:8cdad1c73e8e	353	#define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
bfictorie	0:8cdad1c73e8e	354	if (neg) { \
bfictorie	0:8cdad1c73e8e	355	int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
bfictorie	0:8cdad1c73e8e	356	if (len >= vjlen) { \
bfictorie	0:8cdad1c73e8e	357	PUTCHAR(opt, ucp); \
bfictorie	0:8cdad1c73e8e	358	PUTCHAR(vjlen, ucp); \
bfictorie	0:8cdad1c73e8e	359	PUTSHORT(val, ucp); \
bfictorie	0:8cdad1c73e8e	360	if (!old) { \
bfictorie	0:8cdad1c73e8e	361	PUTCHAR(maxslotindex, ucp); \
bfictorie	0:8cdad1c73e8e	362	PUTCHAR(cflag, ucp); \
bfictorie	0:8cdad1c73e8e	363	} \
bfictorie	0:8cdad1c73e8e	364	len -= vjlen; \
bfictorie	0:8cdad1c73e8e	365	} else { \
bfictorie	0:8cdad1c73e8e	366	neg = 0; \
bfictorie	0:8cdad1c73e8e	367	} \
bfictorie	0:8cdad1c73e8e	368	}
bfictorie	0:8cdad1c73e8e	369
bfictorie	0:8cdad1c73e8e	370	#define ADDCIADDR(opt, neg, old, val1, val2) \
bfictorie	0:8cdad1c73e8e	371	if (neg) { \
bfictorie	0:8cdad1c73e8e	372	int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
bfictorie	0:8cdad1c73e8e	373	if (len >= addrlen) { \
bfictorie	0:8cdad1c73e8e	374	u32_t l; \
bfictorie	0:8cdad1c73e8e	375	PUTCHAR(opt, ucp); \
bfictorie	0:8cdad1c73e8e	376	PUTCHAR(addrlen, ucp); \
bfictorie	0:8cdad1c73e8e	377	l = ntohl(val1); \
bfictorie	0:8cdad1c73e8e	378	PUTLONG(l, ucp); \
bfictorie	0:8cdad1c73e8e	379	if (old) { \
bfictorie	0:8cdad1c73e8e	380	l = ntohl(val2); \
bfictorie	0:8cdad1c73e8e	381	PUTLONG(l, ucp); \
bfictorie	0:8cdad1c73e8e	382	} \
bfictorie	0:8cdad1c73e8e	383	len -= addrlen; \
bfictorie	0:8cdad1c73e8e	384	} else { \
bfictorie	0:8cdad1c73e8e	385	neg = 0; \
bfictorie	0:8cdad1c73e8e	386	} \
bfictorie	0:8cdad1c73e8e	387	}
bfictorie	0:8cdad1c73e8e	388
bfictorie	0:8cdad1c73e8e	389	#define ADDCIDNS(opt, neg, addr) \
bfictorie	0:8cdad1c73e8e	390	if (neg) { \
bfictorie	0:8cdad1c73e8e	391	if (len >= CILEN_ADDR) { \
bfictorie	0:8cdad1c73e8e	392	u32_t l; \
bfictorie	0:8cdad1c73e8e	393	PUTCHAR(opt, ucp); \
bfictorie	0:8cdad1c73e8e	394	PUTCHAR(CILEN_ADDR, ucp); \
bfictorie	0:8cdad1c73e8e	395	l = ntohl(addr); \
bfictorie	0:8cdad1c73e8e	396	PUTLONG(l, ucp); \
bfictorie	0:8cdad1c73e8e	397	len -= CILEN_ADDR; \
bfictorie	0:8cdad1c73e8e	398	} else { \
bfictorie	0:8cdad1c73e8e	399	neg = 0; \
bfictorie	0:8cdad1c73e8e	400	} \
bfictorie	0:8cdad1c73e8e	401	}
bfictorie	0:8cdad1c73e8e	402
bfictorie	0:8cdad1c73e8e	403	ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
bfictorie	0:8cdad1c73e8e	404	go->old_addrs, go->ouraddr, go->hisaddr);
bfictorie	0:8cdad1c73e8e	405
bfictorie	0:8cdad1c73e8e	406	ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
bfictorie	0:8cdad1c73e8e	407	go->maxslotindex, go->cflag);
bfictorie	0:8cdad1c73e8e	408
bfictorie	0:8cdad1c73e8e	409	ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
bfictorie	0:8cdad1c73e8e	410
bfictorie	0:8cdad1c73e8e	411	ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
bfictorie	0:8cdad1c73e8e	412
bfictorie	0:8cdad1c73e8e	413	*lenp -= len;
bfictorie	0:8cdad1c73e8e	414	}
bfictorie	0:8cdad1c73e8e	415
bfictorie	0:8cdad1c73e8e	416
bfictorie	0:8cdad1c73e8e	417	/*
bfictorie	0:8cdad1c73e8e	418	* ipcp_ackci - Ack our CIs.
bfictorie	0:8cdad1c73e8e	419	*
bfictorie	0:8cdad1c73e8e	420	* Returns:
bfictorie	0:8cdad1c73e8e	421	* 0 - Ack was bad.
bfictorie	0:8cdad1c73e8e	422	* 1 - Ack was good.
bfictorie	0:8cdad1c73e8e	423	*/
bfictorie	0:8cdad1c73e8e	424	static int
bfictorie	0:8cdad1c73e8e	425	ipcp_ackci(fsm f, u_char p, int len)
bfictorie	0:8cdad1c73e8e	426	{
bfictorie	0:8cdad1c73e8e	427	ipcp_options *go = &ipcp_gotoptions[f->unit];
bfictorie	0:8cdad1c73e8e	428	u_short cilen, citype, cishort;
bfictorie	0:8cdad1c73e8e	429	u32_t cilong;
bfictorie	0:8cdad1c73e8e	430	u_char cimaxslotindex, cicflag;
bfictorie	0:8cdad1c73e8e	431
bfictorie	0:8cdad1c73e8e	432	/*
bfictorie	0:8cdad1c73e8e	433	* CIs must be in exactly the same order that we sent...
bfictorie	0:8cdad1c73e8e	434	* Check packet length and CI length at each step.
bfictorie	0:8cdad1c73e8e	435	* If we find any deviations, then this packet is bad.
bfictorie	0:8cdad1c73e8e	436	*/
bfictorie	0:8cdad1c73e8e	437
bfictorie	0:8cdad1c73e8e	438	#define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
bfictorie	0:8cdad1c73e8e	439	if (neg) { \
bfictorie	0:8cdad1c73e8e	440	int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
bfictorie	0:8cdad1c73e8e	441	if ((len -= vjlen) < 0) { \
bfictorie	0:8cdad1c73e8e	442	goto bad; \
bfictorie	0:8cdad1c73e8e	443	} \
bfictorie	0:8cdad1c73e8e	444	GETCHAR(citype, p); \
bfictorie	0:8cdad1c73e8e	445	GETCHAR(cilen, p); \
bfictorie	0:8cdad1c73e8e	446	if (cilen != vjlen \|\| \
bfictorie	0:8cdad1c73e8e	447	citype != opt) { \
bfictorie	0:8cdad1c73e8e	448	goto bad; \
bfictorie	0:8cdad1c73e8e	449	} \
bfictorie	0:8cdad1c73e8e	450	GETSHORT(cishort, p); \
bfictorie	0:8cdad1c73e8e	451	if (cishort != val) { \
bfictorie	0:8cdad1c73e8e	452	goto bad; \
bfictorie	0:8cdad1c73e8e	453	} \
bfictorie	0:8cdad1c73e8e	454	if (!old) { \
bfictorie	0:8cdad1c73e8e	455	GETCHAR(cimaxslotindex, p); \
bfictorie	0:8cdad1c73e8e	456	if (cimaxslotindex != maxslotindex) { \
bfictorie	0:8cdad1c73e8e	457	goto bad; \
bfictorie	0:8cdad1c73e8e	458	} \
bfictorie	0:8cdad1c73e8e	459	GETCHAR(cicflag, p); \
bfictorie	0:8cdad1c73e8e	460	if (cicflag != cflag) { \
bfictorie	0:8cdad1c73e8e	461	goto bad; \
bfictorie	0:8cdad1c73e8e	462	} \
bfictorie	0:8cdad1c73e8e	463	} \
bfictorie	0:8cdad1c73e8e	464	}
bfictorie	0:8cdad1c73e8e	465
bfictorie	0:8cdad1c73e8e	466	#define ACKCIADDR(opt, neg, old, val1, val2) \
bfictorie	0:8cdad1c73e8e	467	if (neg) { \
bfictorie	0:8cdad1c73e8e	468	int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
bfictorie	0:8cdad1c73e8e	469	u32_t l; \
bfictorie	0:8cdad1c73e8e	470	if ((len -= addrlen) < 0) { \
bfictorie	0:8cdad1c73e8e	471	goto bad; \
bfictorie	0:8cdad1c73e8e	472	} \
bfictorie	0:8cdad1c73e8e	473	GETCHAR(citype, p); \
bfictorie	0:8cdad1c73e8e	474	GETCHAR(cilen, p); \
bfictorie	0:8cdad1c73e8e	475	if (cilen != addrlen \|\| \
bfictorie	0:8cdad1c73e8e	476	citype != opt) { \
bfictorie	0:8cdad1c73e8e	477	goto bad; \
bfictorie	0:8cdad1c73e8e	478	} \
bfictorie	0:8cdad1c73e8e	479	GETLONG(l, p); \
bfictorie	0:8cdad1c73e8e	480	cilong = htonl(l); \
bfictorie	0:8cdad1c73e8e	481	if (val1 != cilong) { \
bfictorie	0:8cdad1c73e8e	482	goto bad; \
bfictorie	0:8cdad1c73e8e	483	} \
bfictorie	0:8cdad1c73e8e	484	if (old) { \
bfictorie	0:8cdad1c73e8e	485	GETLONG(l, p); \
bfictorie	0:8cdad1c73e8e	486	cilong = htonl(l); \
bfictorie	0:8cdad1c73e8e	487	if (val2 != cilong) { \
bfictorie	0:8cdad1c73e8e	488	goto bad; \
bfictorie	0:8cdad1c73e8e	489	} \
bfictorie	0:8cdad1c73e8e	490	} \
bfictorie	0:8cdad1c73e8e	491	}
bfictorie	0:8cdad1c73e8e	492
bfictorie	0:8cdad1c73e8e	493	#define ACKCIDNS(opt, neg, addr) \
bfictorie	0:8cdad1c73e8e	494	if (neg) { \
bfictorie	0:8cdad1c73e8e	495	u32_t l; \
bfictorie	0:8cdad1c73e8e	496	if ((len -= CILEN_ADDR) < 0) { \
bfictorie	0:8cdad1c73e8e	497	goto bad; \
bfictorie	0:8cdad1c73e8e	498	} \
bfictorie	0:8cdad1c73e8e	499	GETCHAR(citype, p); \
bfictorie	0:8cdad1c73e8e	500	GETCHAR(cilen, p); \
bfictorie	0:8cdad1c73e8e	501	if (cilen != CILEN_ADDR \|\| \
bfictorie	0:8cdad1c73e8e	502	citype != opt) { \
bfictorie	0:8cdad1c73e8e	503	goto bad; \
bfictorie	0:8cdad1c73e8e	504	} \
bfictorie	0:8cdad1c73e8e	505	GETLONG(l, p); \
bfictorie	0:8cdad1c73e8e	506	cilong = htonl(l); \
bfictorie	0:8cdad1c73e8e	507	if (addr != cilong) { \
bfictorie	0:8cdad1c73e8e	508	goto bad; \
bfictorie	0:8cdad1c73e8e	509	} \
bfictorie	0:8cdad1c73e8e	510	}
bfictorie	0:8cdad1c73e8e	511
bfictorie	0:8cdad1c73e8e	512	ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
bfictorie	0:8cdad1c73e8e	513	go->old_addrs, go->ouraddr, go->hisaddr);
bfictorie	0:8cdad1c73e8e	514
bfictorie	0:8cdad1c73e8e	515	ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
bfictorie	0:8cdad1c73e8e	516	go->maxslotindex, go->cflag);
bfictorie	0:8cdad1c73e8e	517
bfictorie	0:8cdad1c73e8e	518	ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
bfictorie	0:8cdad1c73e8e	519
bfictorie	0:8cdad1c73e8e	520	ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
bfictorie	0:8cdad1c73e8e	521
bfictorie	0:8cdad1c73e8e	522	/*
bfictorie	0:8cdad1c73e8e	523	* If there are any remaining CIs, then this packet is bad.
bfictorie	0:8cdad1c73e8e	524	*/
bfictorie	0:8cdad1c73e8e	525	if (len != 0) {
bfictorie	0:8cdad1c73e8e	526	goto bad;
bfictorie	0:8cdad1c73e8e	527	}
bfictorie	0:8cdad1c73e8e	528	return (1);
bfictorie	0:8cdad1c73e8e	529
bfictorie	0:8cdad1c73e8e	530	bad:
bfictorie	0:8cdad1c73e8e	531	IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
bfictorie	0:8cdad1c73e8e	532	return (0);
bfictorie	0:8cdad1c73e8e	533	}
bfictorie	0:8cdad1c73e8e	534
bfictorie	0:8cdad1c73e8e	535	/*
bfictorie	0:8cdad1c73e8e	536	* ipcp_nakci - Peer has sent a NAK for some of our CIs.
bfictorie	0:8cdad1c73e8e	537	* This should not modify any state if the Nak is bad
bfictorie	0:8cdad1c73e8e	538	* or if IPCP is in the LS_OPENED state.
bfictorie	0:8cdad1c73e8e	539	*
bfictorie	0:8cdad1c73e8e	540	* Returns:
bfictorie	0:8cdad1c73e8e	541	* 0 - Nak was bad.
bfictorie	0:8cdad1c73e8e	542	* 1 - Nak was good.
bfictorie	0:8cdad1c73e8e	543	*/
bfictorie	0:8cdad1c73e8e	544	static int
bfictorie	0:8cdad1c73e8e	545	ipcp_nakci(fsm f, u_char p, int len)
bfictorie	0:8cdad1c73e8e	546	{
bfictorie	0:8cdad1c73e8e	547	ipcp_options *go = &ipcp_gotoptions[f->unit];
bfictorie	0:8cdad1c73e8e	548	u_char cimaxslotindex, cicflag;
bfictorie	0:8cdad1c73e8e	549	u_char citype, cilen, *next;
bfictorie	0:8cdad1c73e8e	550	u_short cishort;
bfictorie	0:8cdad1c73e8e	551	u32_t ciaddr1, ciaddr2, l, cidnsaddr;
bfictorie	0:8cdad1c73e8e	552	ipcp_options no; /* options we've seen Naks for */
bfictorie	0:8cdad1c73e8e	553	ipcp_options try; /* options to request next time */
bfictorie	0:8cdad1c73e8e	554
bfictorie	0:8cdad1c73e8e	555	BZERO(&no, sizeof(no));
bfictorie	0:8cdad1c73e8e	556	try = *go;
bfictorie	0:8cdad1c73e8e	557
bfictorie	0:8cdad1c73e8e	558	/*
bfictorie	0:8cdad1c73e8e	559	* Any Nak'd CIs must be in exactly the same order that we sent.
bfictorie	0:8cdad1c73e8e	560	* Check packet length and CI length at each step.
bfictorie	0:8cdad1c73e8e	561	* If we find any deviations, then this packet is bad.
bfictorie	0:8cdad1c73e8e	562	*/
bfictorie	0:8cdad1c73e8e	563	#define NAKCIADDR(opt, neg, old, code) \
bfictorie	0:8cdad1c73e8e	564	if (go->neg && \
bfictorie	0:8cdad1c73e8e	565	len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
bfictorie	0:8cdad1c73e8e	566	p[1] == cilen && \
bfictorie	0:8cdad1c73e8e	567	p[0] == opt) { \
bfictorie	0:8cdad1c73e8e	568	len -= cilen; \
bfictorie	0:8cdad1c73e8e	569	INCPTR(2, p); \
bfictorie	0:8cdad1c73e8e	570	GETLONG(l, p); \
bfictorie	0:8cdad1c73e8e	571	ciaddr1 = htonl(l); \
bfictorie	0:8cdad1c73e8e	572	if (old) { \
bfictorie	0:8cdad1c73e8e	573	GETLONG(l, p); \
bfictorie	0:8cdad1c73e8e	574	ciaddr2 = htonl(l); \
bfictorie	0:8cdad1c73e8e	575	no.old_addrs = 1; \
bfictorie	0:8cdad1c73e8e	576	} else { \
bfictorie	0:8cdad1c73e8e	577	ciaddr2 = 0; \
bfictorie	0:8cdad1c73e8e	578	} \
bfictorie	0:8cdad1c73e8e	579	no.neg = 1; \
bfictorie	0:8cdad1c73e8e	580	code \
bfictorie	0:8cdad1c73e8e	581	}
bfictorie	0:8cdad1c73e8e	582
bfictorie	0:8cdad1c73e8e	583	#define NAKCIVJ(opt, neg, code) \
bfictorie	0:8cdad1c73e8e	584	if (go->neg && \
bfictorie	0:8cdad1c73e8e	585	((cilen = p[1]) == CILEN_COMPRESS \|\| cilen == CILEN_VJ) && \
bfictorie	0:8cdad1c73e8e	586	len >= cilen && \
bfictorie	0:8cdad1c73e8e	587	p[0] == opt) { \
bfictorie	0:8cdad1c73e8e	588	len -= cilen; \
bfictorie	0:8cdad1c73e8e	589	INCPTR(2, p); \
bfictorie	0:8cdad1c73e8e	590	GETSHORT(cishort, p); \
bfictorie	0:8cdad1c73e8e	591	no.neg = 1; \
bfictorie	0:8cdad1c73e8e	592	code \
bfictorie	0:8cdad1c73e8e	593	}
bfictorie	0:8cdad1c73e8e	594
bfictorie	0:8cdad1c73e8e	595	#define NAKCIDNS(opt, neg, code) \
bfictorie	0:8cdad1c73e8e	596	if (go->neg && \
bfictorie	0:8cdad1c73e8e	597	((cilen = p[1]) == CILEN_ADDR) && \
bfictorie	0:8cdad1c73e8e	598	len >= cilen && \
bfictorie	0:8cdad1c73e8e	599	p[0] == opt) { \
bfictorie	0:8cdad1c73e8e	600	len -= cilen; \
bfictorie	0:8cdad1c73e8e	601	INCPTR(2, p); \
bfictorie	0:8cdad1c73e8e	602	GETLONG(l, p); \
bfictorie	0:8cdad1c73e8e	603	cidnsaddr = htonl(l); \
bfictorie	0:8cdad1c73e8e	604	no.neg = 1; \
bfictorie	0:8cdad1c73e8e	605	code \
bfictorie	0:8cdad1c73e8e	606	}
bfictorie	0:8cdad1c73e8e	607
bfictorie	0:8cdad1c73e8e	608	/*
bfictorie	0:8cdad1c73e8e	609	* Accept the peer's idea of {our,his} address, if different
bfictorie	0:8cdad1c73e8e	610	* from our idea, only if the accept_{local,remote} flag is set.
bfictorie	0:8cdad1c73e8e	611	*/
bfictorie	0:8cdad1c73e8e	612	NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
bfictorie	0:8cdad1c73e8e	613	if (go->accept_local && ciaddr1) { /* Do we know our address? */
bfictorie	0:8cdad1c73e8e	614	try.ouraddr = ciaddr1;
bfictorie	0:8cdad1c73e8e	615	IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
bfictorie	0:8cdad1c73e8e	616	inet_ntoa(ciaddr1)));
bfictorie	0:8cdad1c73e8e	617	}
bfictorie	0:8cdad1c73e8e	618	if (go->accept_remote && ciaddr2) { /* Does he know his? */
bfictorie	0:8cdad1c73e8e	619	try.hisaddr = ciaddr2;
bfictorie	0:8cdad1c73e8e	620	IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
bfictorie	0:8cdad1c73e8e	621	inet_ntoa(ciaddr2)));
bfictorie	0:8cdad1c73e8e	622	}
bfictorie	0:8cdad1c73e8e	623	);
bfictorie	0:8cdad1c73e8e	624
bfictorie	0:8cdad1c73e8e	625	/*
bfictorie	0:8cdad1c73e8e	626	* Accept the peer's value of maxslotindex provided that it
bfictorie	0:8cdad1c73e8e	627	* is less than what we asked for. Turn off slot-ID compression
bfictorie	0:8cdad1c73e8e	628	* if the peer wants. Send old-style compress-type option if
bfictorie	0:8cdad1c73e8e	629	* the peer wants.
bfictorie	0:8cdad1c73e8e	630	*/
bfictorie	0:8cdad1c73e8e	631	NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
bfictorie	0:8cdad1c73e8e	632	if (cilen == CILEN_VJ) {
bfictorie	0:8cdad1c73e8e	633	GETCHAR(cimaxslotindex, p);
bfictorie	0:8cdad1c73e8e	634	GETCHAR(cicflag, p);
bfictorie	0:8cdad1c73e8e	635	if (cishort == IPCP_VJ_COMP) {
bfictorie	0:8cdad1c73e8e	636	try.old_vj = 0;
bfictorie	0:8cdad1c73e8e	637	if (cimaxslotindex < go->maxslotindex) {
bfictorie	0:8cdad1c73e8e	638	try.maxslotindex = cimaxslotindex;
bfictorie	0:8cdad1c73e8e	639	}
bfictorie	0:8cdad1c73e8e	640	if (!cicflag) {
bfictorie	0:8cdad1c73e8e	641	try.cflag = 0;
bfictorie	0:8cdad1c73e8e	642	}
bfictorie	0:8cdad1c73e8e	643	} else {
bfictorie	0:8cdad1c73e8e	644	try.neg_vj = 0;
bfictorie	0:8cdad1c73e8e	645	}
bfictorie	0:8cdad1c73e8e	646	} else {
bfictorie	0:8cdad1c73e8e	647	if (cishort == IPCP_VJ_COMP \|\| cishort == IPCP_VJ_COMP_OLD) {
bfictorie	0:8cdad1c73e8e	648	try.old_vj = 1;
bfictorie	0:8cdad1c73e8e	649	try.vj_protocol = cishort;
bfictorie	0:8cdad1c73e8e	650	} else {
bfictorie	0:8cdad1c73e8e	651	try.neg_vj = 0;
bfictorie	0:8cdad1c73e8e	652	}
bfictorie	0:8cdad1c73e8e	653	}
bfictorie	0:8cdad1c73e8e	654	);
bfictorie	0:8cdad1c73e8e	655
bfictorie	0:8cdad1c73e8e	656	NAKCIDNS(CI_MS_DNS1, req_dns1,
bfictorie	0:8cdad1c73e8e	657	try.dnsaddr[0] = cidnsaddr;
bfictorie	0:8cdad1c73e8e	658	IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
bfictorie	0:8cdad1c73e8e	659	);
bfictorie	0:8cdad1c73e8e	660
bfictorie	0:8cdad1c73e8e	661	NAKCIDNS(CI_MS_DNS2, req_dns2,
bfictorie	0:8cdad1c73e8e	662	try.dnsaddr[1] = cidnsaddr;
bfictorie	0:8cdad1c73e8e	663	IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
bfictorie	0:8cdad1c73e8e	664	);
bfictorie	0:8cdad1c73e8e	665
bfictorie	0:8cdad1c73e8e	666	/*
bfictorie	0:8cdad1c73e8e	667	* There may be remaining CIs, if the peer is requesting negotiation
bfictorie	0:8cdad1c73e8e	668	* on an option that we didn't include in our request packet.
bfictorie	0:8cdad1c73e8e	669	* If they want to negotiate about IP addresses, we comply.
bfictorie	0:8cdad1c73e8e	670	* If they want us to ask for compression, we refuse.
bfictorie	0:8cdad1c73e8e	671	*/
bfictorie	0:8cdad1c73e8e	672	while (len > CILEN_VOID) {
bfictorie	0:8cdad1c73e8e	673	GETCHAR(citype, p);
bfictorie	0:8cdad1c73e8e	674	GETCHAR(cilen, p);
bfictorie	0:8cdad1c73e8e	675	if( (len -= cilen) < 0 ) {
bfictorie	0:8cdad1c73e8e	676	goto bad;
bfictorie	0:8cdad1c73e8e	677	}
bfictorie	0:8cdad1c73e8e	678	next = p + cilen - 2;
bfictorie	0:8cdad1c73e8e	679
bfictorie	0:8cdad1c73e8e	680	switch (citype) {
bfictorie	0:8cdad1c73e8e	681	case CI_COMPRESSTYPE:
bfictorie	0:8cdad1c73e8e	682	if (go->neg_vj \|\| no.neg_vj \|\|
bfictorie	0:8cdad1c73e8e	683	(cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
bfictorie	0:8cdad1c73e8e	684	goto bad;
bfictorie	0:8cdad1c73e8e	685	}
bfictorie	0:8cdad1c73e8e	686	no.neg_vj = 1;
bfictorie	0:8cdad1c73e8e	687	break;
bfictorie	0:8cdad1c73e8e	688	case CI_ADDRS:
bfictorie	0:8cdad1c73e8e	689	if ((go->neg_addr && go->old_addrs) \|\| no.old_addrs
bfictorie	0:8cdad1c73e8e	690	\|\| cilen != CILEN_ADDRS) {
bfictorie	0:8cdad1c73e8e	691	goto bad;
bfictorie	0:8cdad1c73e8e	692	}
bfictorie	0:8cdad1c73e8e	693	try.neg_addr = 1;
bfictorie	0:8cdad1c73e8e	694	try.old_addrs = 1;
bfictorie	0:8cdad1c73e8e	695	GETLONG(l, p);
bfictorie	0:8cdad1c73e8e	696	ciaddr1 = htonl(l);
bfictorie	0:8cdad1c73e8e	697	if (ciaddr1 && go->accept_local) {
bfictorie	0:8cdad1c73e8e	698	try.ouraddr = ciaddr1;
bfictorie	0:8cdad1c73e8e	699	}
bfictorie	0:8cdad1c73e8e	700	GETLONG(l, p);
bfictorie	0:8cdad1c73e8e	701	ciaddr2 = htonl(l);
bfictorie	0:8cdad1c73e8e	702	if (ciaddr2 && go->accept_remote) {
bfictorie	0:8cdad1c73e8e	703	try.hisaddr = ciaddr2;
bfictorie	0:8cdad1c73e8e	704	}
bfictorie	0:8cdad1c73e8e	705	no.old_addrs = 1;
bfictorie	0:8cdad1c73e8e	706	break;
bfictorie	0:8cdad1c73e8e	707	case CI_ADDR:
bfictorie	0:8cdad1c73e8e	708	if (go->neg_addr \|\| no.neg_addr \|\| cilen != CILEN_ADDR) {
bfictorie	0:8cdad1c73e8e	709	goto bad;
bfictorie	0:8cdad1c73e8e	710	}
bfictorie	0:8cdad1c73e8e	711	try.old_addrs = 0;
bfictorie	0:8cdad1c73e8e	712	GETLONG(l, p);
bfictorie	0:8cdad1c73e8e	713	ciaddr1 = htonl(l);
bfictorie	0:8cdad1c73e8e	714	if (ciaddr1 && go->accept_local) {
bfictorie	0:8cdad1c73e8e	715	try.ouraddr = ciaddr1;
bfictorie	0:8cdad1c73e8e	716	}
bfictorie	0:8cdad1c73e8e	717	if (try.ouraddr != 0) {
bfictorie	0:8cdad1c73e8e	718	try.neg_addr = 1;
bfictorie	0:8cdad1c73e8e	719	}
bfictorie	0:8cdad1c73e8e	720	no.neg_addr = 1;
bfictorie	0:8cdad1c73e8e	721	break;
bfictorie	0:8cdad1c73e8e	722	}
bfictorie	0:8cdad1c73e8e	723	p = next;
bfictorie	0:8cdad1c73e8e	724	}
bfictorie	0:8cdad1c73e8e	725
bfictorie	0:8cdad1c73e8e	726	/* If there is still anything left, this packet is bad. */
bfictorie	0:8cdad1c73e8e	727	if (len != 0) {
bfictorie	0:8cdad1c73e8e	728	goto bad;
bfictorie	0:8cdad1c73e8e	729	}
bfictorie	0:8cdad1c73e8e	730
bfictorie	0:8cdad1c73e8e	731	/*
bfictorie	0:8cdad1c73e8e	732	* OK, the Nak is good. Now we can update state.
bfictorie	0:8cdad1c73e8e	733	*/
bfictorie	0:8cdad1c73e8e	734	if (f->state != LS_OPENED) {
bfictorie	0:8cdad1c73e8e	735	*go = try;
bfictorie	0:8cdad1c73e8e	736	}
bfictorie	0:8cdad1c73e8e	737
bfictorie	0:8cdad1c73e8e	738	return 1;
bfictorie	0:8cdad1c73e8e	739
bfictorie	0:8cdad1c73e8e	740	bad:
bfictorie	0:8cdad1c73e8e	741	IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
bfictorie	0:8cdad1c73e8e	742	return 0;
bfictorie	0:8cdad1c73e8e	743	}
bfictorie	0:8cdad1c73e8e	744
bfictorie	0:8cdad1c73e8e	745
bfictorie	0:8cdad1c73e8e	746	/*
bfictorie	0:8cdad1c73e8e	747	* ipcp_rejci - Reject some of our CIs.
bfictorie	0:8cdad1c73e8e	748	*/
bfictorie	0:8cdad1c73e8e	749	static int
bfictorie	0:8cdad1c73e8e	750	ipcp_rejci(fsm f, u_char p, int len)
bfictorie	0:8cdad1c73e8e	751	{
bfictorie	0:8cdad1c73e8e	752	ipcp_options *go = &ipcp_gotoptions[f->unit];
bfictorie	0:8cdad1c73e8e	753	u_char cimaxslotindex, ciflag, cilen;
bfictorie	0:8cdad1c73e8e	754	u_short cishort;
bfictorie	0:8cdad1c73e8e	755	u32_t cilong;
bfictorie	0:8cdad1c73e8e	756	ipcp_options try; /* options to request next time */
bfictorie	0:8cdad1c73e8e	757
bfictorie	0:8cdad1c73e8e	758	try = *go;
bfictorie	0:8cdad1c73e8e	759	/*
bfictorie	0:8cdad1c73e8e	760	* Any Rejected CIs must be in exactly the same order that we sent.
bfictorie	0:8cdad1c73e8e	761	* Check packet length and CI length at each step.
bfictorie	0:8cdad1c73e8e	762	* If we find any deviations, then this packet is bad.
bfictorie	0:8cdad1c73e8e	763	*/
bfictorie	0:8cdad1c73e8e	764	#define REJCIADDR(opt, neg, old, val1, val2) \
bfictorie	0:8cdad1c73e8e	765	if (go->neg && \
bfictorie	0:8cdad1c73e8e	766	len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
bfictorie	0:8cdad1c73e8e	767	p[1] == cilen && \
bfictorie	0:8cdad1c73e8e	768	p[0] == opt) { \
bfictorie	0:8cdad1c73e8e	769	u32_t l; \
bfictorie	0:8cdad1c73e8e	770	len -= cilen; \
bfictorie	0:8cdad1c73e8e	771	INCPTR(2, p); \
bfictorie	0:8cdad1c73e8e	772	GETLONG(l, p); \
bfictorie	0:8cdad1c73e8e	773	cilong = htonl(l); \
bfictorie	0:8cdad1c73e8e	774	/* Check rejected value. */ \
bfictorie	0:8cdad1c73e8e	775	if (cilong != val1) { \
bfictorie	0:8cdad1c73e8e	776	goto bad; \
bfictorie	0:8cdad1c73e8e	777	} \
bfictorie	0:8cdad1c73e8e	778	if (old) { \
bfictorie	0:8cdad1c73e8e	779	GETLONG(l, p); \
bfictorie	0:8cdad1c73e8e	780	cilong = htonl(l); \
bfictorie	0:8cdad1c73e8e	781	/* Check rejected value. */ \
bfictorie	0:8cdad1c73e8e	782	if (cilong != val2) { \
bfictorie	0:8cdad1c73e8e	783	goto bad; \
bfictorie	0:8cdad1c73e8e	784	} \
bfictorie	0:8cdad1c73e8e	785	} \
bfictorie	0:8cdad1c73e8e	786	try.neg = 0; \
bfictorie	0:8cdad1c73e8e	787	}
bfictorie	0:8cdad1c73e8e	788
bfictorie	0:8cdad1c73e8e	789	#define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
bfictorie	0:8cdad1c73e8e	790	if (go->neg && \
bfictorie	0:8cdad1c73e8e	791	p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
bfictorie	0:8cdad1c73e8e	792	len >= p[1] && \
bfictorie	0:8cdad1c73e8e	793	p[0] == opt) { \
bfictorie	0:8cdad1c73e8e	794	len -= p[1]; \
bfictorie	0:8cdad1c73e8e	795	INCPTR(2, p); \
bfictorie	0:8cdad1c73e8e	796	GETSHORT(cishort, p); \
bfictorie	0:8cdad1c73e8e	797	/* Check rejected value. */ \
bfictorie	0:8cdad1c73e8e	798	if (cishort != val) { \
bfictorie	0:8cdad1c73e8e	799	goto bad; \
bfictorie	0:8cdad1c73e8e	800	} \
bfictorie	0:8cdad1c73e8e	801	if (!old) { \
bfictorie	0:8cdad1c73e8e	802	GETCHAR(cimaxslotindex, p); \
bfictorie	0:8cdad1c73e8e	803	if (cimaxslotindex != maxslot) { \
bfictorie	0:8cdad1c73e8e	804	goto bad; \
bfictorie	0:8cdad1c73e8e	805	} \
bfictorie	0:8cdad1c73e8e	806	GETCHAR(ciflag, p); \
bfictorie	0:8cdad1c73e8e	807	if (ciflag != cflag) { \
bfictorie	0:8cdad1c73e8e	808	goto bad; \
bfictorie	0:8cdad1c73e8e	809	} \
bfictorie	0:8cdad1c73e8e	810	} \
bfictorie	0:8cdad1c73e8e	811	try.neg = 0; \
bfictorie	0:8cdad1c73e8e	812	}
bfictorie	0:8cdad1c73e8e	813
bfictorie	0:8cdad1c73e8e	814	#define REJCIDNS(opt, neg, dnsaddr) \
bfictorie	0:8cdad1c73e8e	815	if (go->neg && \
bfictorie	0:8cdad1c73e8e	816	((cilen = p[1]) == CILEN_ADDR) && \
bfictorie	0:8cdad1c73e8e	817	len >= cilen && \
bfictorie	0:8cdad1c73e8e	818	p[0] == opt) { \
bfictorie	0:8cdad1c73e8e	819	u32_t l; \
bfictorie	0:8cdad1c73e8e	820	len -= cilen; \
bfictorie	0:8cdad1c73e8e	821	INCPTR(2, p); \
bfictorie	0:8cdad1c73e8e	822	GETLONG(l, p); \
bfictorie	0:8cdad1c73e8e	823	cilong = htonl(l); \
bfictorie	0:8cdad1c73e8e	824	/* Check rejected value. */ \
bfictorie	0:8cdad1c73e8e	825	if (cilong != dnsaddr) { \
bfictorie	0:8cdad1c73e8e	826	goto bad; \
bfictorie	0:8cdad1c73e8e	827	} \
bfictorie	0:8cdad1c73e8e	828	try.neg = 0; \
bfictorie	0:8cdad1c73e8e	829	}
bfictorie	0:8cdad1c73e8e	830
bfictorie	0:8cdad1c73e8e	831	REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
bfictorie	0:8cdad1c73e8e	832	go->old_addrs, go->ouraddr, go->hisaddr);
bfictorie	0:8cdad1c73e8e	833
bfictorie	0:8cdad1c73e8e	834	REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
bfictorie	0:8cdad1c73e8e	835	go->maxslotindex, go->cflag);
bfictorie	0:8cdad1c73e8e	836
bfictorie	0:8cdad1c73e8e	837	REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
bfictorie	0:8cdad1c73e8e	838
bfictorie	0:8cdad1c73e8e	839	REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
bfictorie	0:8cdad1c73e8e	840
bfictorie	0:8cdad1c73e8e	841	/*
bfictorie	0:8cdad1c73e8e	842	* If there are any remaining CIs, then this packet is bad.
bfictorie	0:8cdad1c73e8e	843	*/
bfictorie	0:8cdad1c73e8e	844	if (len != 0) {
bfictorie	0:8cdad1c73e8e	845	goto bad;
bfictorie	0:8cdad1c73e8e	846	}
bfictorie	0:8cdad1c73e8e	847	/*
bfictorie	0:8cdad1c73e8e	848	* Now we can update state.
bfictorie	0:8cdad1c73e8e	849	*/
bfictorie	0:8cdad1c73e8e	850	if (f->state != LS_OPENED) {
bfictorie	0:8cdad1c73e8e	851	*go = try;
bfictorie	0:8cdad1c73e8e	852	}
bfictorie	0:8cdad1c73e8e	853	return 1;
bfictorie	0:8cdad1c73e8e	854
bfictorie	0:8cdad1c73e8e	855	bad:
bfictorie	0:8cdad1c73e8e	856	IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
bfictorie	0:8cdad1c73e8e	857	return 0;
bfictorie	0:8cdad1c73e8e	858	}
bfictorie	0:8cdad1c73e8e	859
bfictorie	0:8cdad1c73e8e	860
bfictorie	0:8cdad1c73e8e	861	/*
bfictorie	0:8cdad1c73e8e	862	* ipcp_reqci - Check the peer's requested CIs and send appropriate response.
bfictorie	0:8cdad1c73e8e	863	*
bfictorie	0:8cdad1c73e8e	864	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
bfictorie	0:8cdad1c73e8e	865	* appropriately. If reject_if_disagree is non-zero, doesn't return
bfictorie	0:8cdad1c73e8e	866	* CONFNAK; returns CONFREJ if it can't return CONFACK.
bfictorie	0:8cdad1c73e8e	867	*/
bfictorie	0:8cdad1c73e8e	868	static int
bfictorie	0:8cdad1c73e8e	869	ipcp_reqci(fsm f, u_char inp/* Requested CIs /,int len/* Length of requested CIs */,int reject_if_disagree)
bfictorie	0:8cdad1c73e8e	870	{
bfictorie	0:8cdad1c73e8e	871	ipcp_options *wo = &ipcp_wantoptions[f->unit];
bfictorie	0:8cdad1c73e8e	872	ipcp_options *ho = &ipcp_hisoptions[f->unit];
bfictorie	0:8cdad1c73e8e	873	ipcp_options *ao = &ipcp_allowoptions[f->unit];
bfictorie	0:8cdad1c73e8e	874	#ifdef OLD_CI_ADDRS
bfictorie	0:8cdad1c73e8e	875	ipcp_options *go = &ipcp_gotoptions[f->unit];
bfictorie	0:8cdad1c73e8e	876	#endif
bfictorie	0:8cdad1c73e8e	877	u_char cip, next; /* Pointer to current and next CIs */
bfictorie	0:8cdad1c73e8e	878	u_short cilen, citype; /* Parsed len, type */
bfictorie	0:8cdad1c73e8e	879	u_short cishort; /* Parsed short value */
bfictorie	0:8cdad1c73e8e	880	u32_t tl, ciaddr1; /* Parsed address values */
bfictorie	0:8cdad1c73e8e	881	#ifdef OLD_CI_ADDRS
bfictorie	0:8cdad1c73e8e	882	u32_t ciaddr2; /* Parsed address values */
bfictorie	0:8cdad1c73e8e	883	#endif
bfictorie	0:8cdad1c73e8e	884	int rc = CONFACK; /* Final packet return code */
bfictorie	0:8cdad1c73e8e	885	int orc; /* Individual option return code */
bfictorie	0:8cdad1c73e8e	886	u_char p; / Pointer to next char to parse */
bfictorie	0:8cdad1c73e8e	887	u_char ucp = inp; / Pointer to current output char */
bfictorie	0:8cdad1c73e8e	888	int l = len; / Length left */
bfictorie	0:8cdad1c73e8e	889	u_char maxslotindex, cflag;
bfictorie	0:8cdad1c73e8e	890	int d;
bfictorie	0:8cdad1c73e8e	891
bfictorie	0:8cdad1c73e8e	892	cis_received[f->unit] = 1;
bfictorie	0:8cdad1c73e8e	893
bfictorie	0:8cdad1c73e8e	894	/*
bfictorie	0:8cdad1c73e8e	895	* Reset all his options.
bfictorie	0:8cdad1c73e8e	896	*/
bfictorie	0:8cdad1c73e8e	897	BZERO(ho, sizeof(*ho));
bfictorie	0:8cdad1c73e8e	898
bfictorie	0:8cdad1c73e8e	899	/*
bfictorie	0:8cdad1c73e8e	900	* Process all his options.
bfictorie	0:8cdad1c73e8e	901	*/
bfictorie	0:8cdad1c73e8e	902	next = inp;
bfictorie	0:8cdad1c73e8e	903	while (l) {
bfictorie	0:8cdad1c73e8e	904	orc = CONFACK; /* Assume success */
bfictorie	0:8cdad1c73e8e	905	cip = p = next; /* Remember begining of CI */
bfictorie	0:8cdad1c73e8e	906	if (l < 2 \|\| /* Not enough data for CI header or */
bfictorie	0:8cdad1c73e8e	907	p[1] < 2 \|\| /* CI length too small or */
bfictorie	0:8cdad1c73e8e	908	p[1] > l) { /* CI length too big? */
bfictorie	0:8cdad1c73e8e	909	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
bfictorie	0:8cdad1c73e8e	910	orc = CONFREJ; /* Reject bad CI */
bfictorie	0:8cdad1c73e8e	911	cilen = (u_short)l;/* Reject till end of packet */
bfictorie	0:8cdad1c73e8e	912	l = 0; /* Don't loop again */
bfictorie	0:8cdad1c73e8e	913	goto endswitch;
bfictorie	0:8cdad1c73e8e	914	}
bfictorie	0:8cdad1c73e8e	915	GETCHAR(citype, p); /* Parse CI type */
bfictorie	0:8cdad1c73e8e	916	GETCHAR(cilen, p); /* Parse CI length */
bfictorie	0:8cdad1c73e8e	917	l -= cilen; /* Adjust remaining length */
bfictorie	0:8cdad1c73e8e	918	next += cilen; /* Step to next CI */
bfictorie	0:8cdad1c73e8e	919
bfictorie	0:8cdad1c73e8e	920	switch (citype) { /* Check CI type */
bfictorie	0:8cdad1c73e8e	921	#ifdef OLD_CI_ADDRS /* Need to save space... */
bfictorie	0:8cdad1c73e8e	922	case CI_ADDRS:
bfictorie	0:8cdad1c73e8e	923	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
bfictorie	0:8cdad1c73e8e	924	if (!ao->neg_addr \|\|
bfictorie	0:8cdad1c73e8e	925	cilen != CILEN_ADDRS) { /* Check CI length */
bfictorie	0:8cdad1c73e8e	926	orc = CONFREJ; /* Reject CI */
bfictorie	0:8cdad1c73e8e	927	break;
bfictorie	0:8cdad1c73e8e	928	}
bfictorie	0:8cdad1c73e8e	929
bfictorie	0:8cdad1c73e8e	930	/*
bfictorie	0:8cdad1c73e8e	931	* If he has no address, or if we both have his address but
bfictorie	0:8cdad1c73e8e	932	* disagree about it, then NAK it with our idea.
bfictorie	0:8cdad1c73e8e	933	* In particular, if we don't know his address, but he does,
bfictorie	0:8cdad1c73e8e	934	* then accept it.
bfictorie	0:8cdad1c73e8e	935	*/
bfictorie	0:8cdad1c73e8e	936	GETLONG(tl, p); /* Parse source address (his) */
bfictorie	0:8cdad1c73e8e	937	ciaddr1 = htonl(tl);
bfictorie	0:8cdad1c73e8e	938	IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
bfictorie	0:8cdad1c73e8e	939	if (ciaddr1 != wo->hisaddr
bfictorie	0:8cdad1c73e8e	940	&& (ciaddr1 == 0 \|\| !wo->accept_remote)) {
bfictorie	0:8cdad1c73e8e	941	orc = CONFNAK;
bfictorie	0:8cdad1c73e8e	942	if (!reject_if_disagree) {
bfictorie	0:8cdad1c73e8e	943	DECPTR(sizeof(u32_t), p);
bfictorie	0:8cdad1c73e8e	944	tl = ntohl(wo->hisaddr);
bfictorie	0:8cdad1c73e8e	945	PUTLONG(tl, p);
bfictorie	0:8cdad1c73e8e	946	}
bfictorie	0:8cdad1c73e8e	947	} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
bfictorie	0:8cdad1c73e8e	948	/*
bfictorie	0:8cdad1c73e8e	949	* If neither we nor he knows his address, reject the option.
bfictorie	0:8cdad1c73e8e	950	*/
bfictorie	0:8cdad1c73e8e	951	orc = CONFREJ;
bfictorie	0:8cdad1c73e8e	952	wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
bfictorie	0:8cdad1c73e8e	953	break;
bfictorie	0:8cdad1c73e8e	954	}
bfictorie	0:8cdad1c73e8e	955
bfictorie	0:8cdad1c73e8e	956	/*
bfictorie	0:8cdad1c73e8e	957	* If he doesn't know our address, or if we both have our address
bfictorie	0:8cdad1c73e8e	958	* but disagree about it, then NAK it with our idea.
bfictorie	0:8cdad1c73e8e	959	*/
bfictorie	0:8cdad1c73e8e	960	GETLONG(tl, p); /* Parse desination address (ours) */
bfictorie	0:8cdad1c73e8e	961	ciaddr2 = htonl(tl);
bfictorie	0:8cdad1c73e8e	962	IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
bfictorie	0:8cdad1c73e8e	963	if (ciaddr2 != wo->ouraddr) {
bfictorie	0:8cdad1c73e8e	964	if (ciaddr2 == 0 \|\| !wo->accept_local) {
bfictorie	0:8cdad1c73e8e	965	orc = CONFNAK;
bfictorie	0:8cdad1c73e8e	966	if (!reject_if_disagree) {
bfictorie	0:8cdad1c73e8e	967	DECPTR(sizeof(u32_t), p);
bfictorie	0:8cdad1c73e8e	968	tl = ntohl(wo->ouraddr);
bfictorie	0:8cdad1c73e8e	969	PUTLONG(tl, p);
bfictorie	0:8cdad1c73e8e	970	}
bfictorie	0:8cdad1c73e8e	971	} else {
bfictorie	0:8cdad1c73e8e	972	go->ouraddr = ciaddr2; /* accept peer's idea */
bfictorie	0:8cdad1c73e8e	973	}
bfictorie	0:8cdad1c73e8e	974	}
bfictorie	0:8cdad1c73e8e	975
bfictorie	0:8cdad1c73e8e	976	ho->neg_addr = 1;
bfictorie	0:8cdad1c73e8e	977	ho->old_addrs = 1;
bfictorie	0:8cdad1c73e8e	978	ho->hisaddr = ciaddr1;
bfictorie	0:8cdad1c73e8e	979	ho->ouraddr = ciaddr2;
bfictorie	0:8cdad1c73e8e	980	break;
bfictorie	0:8cdad1c73e8e	981	#endif
bfictorie	0:8cdad1c73e8e	982
bfictorie	0:8cdad1c73e8e	983	case CI_ADDR:
bfictorie	0:8cdad1c73e8e	984	if (!ao->neg_addr) {
bfictorie	0:8cdad1c73e8e	985	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
bfictorie	0:8cdad1c73e8e	986	orc = CONFREJ; /* Reject CI */
bfictorie	0:8cdad1c73e8e	987	break;
bfictorie	0:8cdad1c73e8e	988	} else if (cilen != CILEN_ADDR) { /* Check CI length */
bfictorie	0:8cdad1c73e8e	989	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
bfictorie	0:8cdad1c73e8e	990	orc = CONFREJ; /* Reject CI */
bfictorie	0:8cdad1c73e8e	991	break;
bfictorie	0:8cdad1c73e8e	992	}
bfictorie	0:8cdad1c73e8e	993
bfictorie	0:8cdad1c73e8e	994	/*
bfictorie	0:8cdad1c73e8e	995	* If he has no address, or if we both have his address but
bfictorie	0:8cdad1c73e8e	996	* disagree about it, then NAK it with our idea.
bfictorie	0:8cdad1c73e8e	997	* In particular, if we don't know his address, but he does,
bfictorie	0:8cdad1c73e8e	998	* then accept it.
bfictorie	0:8cdad1c73e8e	999	*/
bfictorie	0:8cdad1c73e8e	1000	GETLONG(tl, p); /* Parse source address (his) */
bfictorie	0:8cdad1c73e8e	1001	ciaddr1 = htonl(tl);
bfictorie	0:8cdad1c73e8e	1002	if (ciaddr1 != wo->hisaddr
bfictorie	0:8cdad1c73e8e	1003	&& (ciaddr1 == 0 \|\| !wo->accept_remote)) {
bfictorie	0:8cdad1c73e8e	1004	orc = CONFNAK;
bfictorie	0:8cdad1c73e8e	1005	if (!reject_if_disagree) {
bfictorie	0:8cdad1c73e8e	1006	DECPTR(sizeof(u32_t), p);
bfictorie	0:8cdad1c73e8e	1007	tl = ntohl(wo->hisaddr);
bfictorie	0:8cdad1c73e8e	1008	PUTLONG(tl, p);
bfictorie	0:8cdad1c73e8e	1009	}
bfictorie	0:8cdad1c73e8e	1010	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
bfictorie	0:8cdad1c73e8e	1011	} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
bfictorie	0:8cdad1c73e8e	1012	/*
bfictorie	0:8cdad1c73e8e	1013	* Don't ACK an address of 0.0.0.0 - reject it instead.
bfictorie	0:8cdad1c73e8e	1014	*/
bfictorie	0:8cdad1c73e8e	1015	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
bfictorie	0:8cdad1c73e8e	1016	orc = CONFREJ;
bfictorie	0:8cdad1c73e8e	1017	wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
bfictorie	0:8cdad1c73e8e	1018	break;
bfictorie	0:8cdad1c73e8e	1019	}
bfictorie	0:8cdad1c73e8e	1020
bfictorie	0:8cdad1c73e8e	1021	ho->neg_addr = 1;
bfictorie	0:8cdad1c73e8e	1022	ho->hisaddr = ciaddr1;
bfictorie	0:8cdad1c73e8e	1023	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
bfictorie	0:8cdad1c73e8e	1024	break;
bfictorie	0:8cdad1c73e8e	1025
bfictorie	0:8cdad1c73e8e	1026	case CI_MS_DNS1:
bfictorie	0:8cdad1c73e8e	1027	case CI_MS_DNS2:
bfictorie	0:8cdad1c73e8e	1028	/* Microsoft primary or secondary DNS request */
bfictorie	0:8cdad1c73e8e	1029	d = citype == CI_MS_DNS2;
bfictorie	0:8cdad1c73e8e	1030
bfictorie	0:8cdad1c73e8e	1031	/* If we do not have a DNS address then we cannot send it */
bfictorie	0:8cdad1c73e8e	1032	if (ao->dnsaddr[d] == 0 \|\|
bfictorie	0:8cdad1c73e8e	1033	cilen != CILEN_ADDR) { /* Check CI length */
bfictorie	0:8cdad1c73e8e	1034	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
bfictorie	0:8cdad1c73e8e	1035	orc = CONFREJ; /* Reject CI */
bfictorie	0:8cdad1c73e8e	1036	break;
bfictorie	0:8cdad1c73e8e	1037	}
bfictorie	0:8cdad1c73e8e	1038	GETLONG(tl, p);
bfictorie	0:8cdad1c73e8e	1039	if (htonl(tl) != ao->dnsaddr[d]) {
bfictorie	0:8cdad1c73e8e	1040	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
bfictorie	0:8cdad1c73e8e	1041	d+1, inet_ntoa(tl)));
bfictorie	0:8cdad1c73e8e	1042	DECPTR(sizeof(u32_t), p);
bfictorie	0:8cdad1c73e8e	1043	tl = ntohl(ao->dnsaddr[d]);
bfictorie	0:8cdad1c73e8e	1044	PUTLONG(tl, p);
bfictorie	0:8cdad1c73e8e	1045	orc = CONFNAK;
bfictorie	0:8cdad1c73e8e	1046	}
bfictorie	0:8cdad1c73e8e	1047	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
bfictorie	0:8cdad1c73e8e	1048	break;
bfictorie	0:8cdad1c73e8e	1049
bfictorie	0:8cdad1c73e8e	1050	case CI_MS_WINS1:
bfictorie	0:8cdad1c73e8e	1051	case CI_MS_WINS2:
bfictorie	0:8cdad1c73e8e	1052	/* Microsoft primary or secondary WINS request */
bfictorie	0:8cdad1c73e8e	1053	d = citype == CI_MS_WINS2;
bfictorie	0:8cdad1c73e8e	1054	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
bfictorie	0:8cdad1c73e8e	1055
bfictorie	0:8cdad1c73e8e	1056	/* If we do not have a DNS address then we cannot send it */
bfictorie	0:8cdad1c73e8e	1057	if (ao->winsaddr[d] == 0 \|\|
bfictorie	0:8cdad1c73e8e	1058	cilen != CILEN_ADDR) { /* Check CI length */
bfictorie	0:8cdad1c73e8e	1059	orc = CONFREJ; /* Reject CI */
bfictorie	0:8cdad1c73e8e	1060	break;
bfictorie	0:8cdad1c73e8e	1061	}
bfictorie	0:8cdad1c73e8e	1062	GETLONG(tl, p);
bfictorie	0:8cdad1c73e8e	1063	if (htonl(tl) != ao->winsaddr[d]) {
bfictorie	0:8cdad1c73e8e	1064	DECPTR(sizeof(u32_t), p);
bfictorie	0:8cdad1c73e8e	1065	tl = ntohl(ao->winsaddr[d]);
bfictorie	0:8cdad1c73e8e	1066	PUTLONG(tl, p);
bfictorie	0:8cdad1c73e8e	1067	orc = CONFNAK;
bfictorie	0:8cdad1c73e8e	1068	}
bfictorie	0:8cdad1c73e8e	1069	break;
bfictorie	0:8cdad1c73e8e	1070
bfictorie	0:8cdad1c73e8e	1071	case CI_COMPRESSTYPE:
bfictorie	0:8cdad1c73e8e	1072	if (!ao->neg_vj) {
bfictorie	0:8cdad1c73e8e	1073	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
bfictorie	0:8cdad1c73e8e	1074	orc = CONFREJ;
bfictorie	0:8cdad1c73e8e	1075	break;
bfictorie	0:8cdad1c73e8e	1076	} else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
bfictorie	0:8cdad1c73e8e	1077	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
bfictorie	0:8cdad1c73e8e	1078	orc = CONFREJ;
bfictorie	0:8cdad1c73e8e	1079	break;
bfictorie	0:8cdad1c73e8e	1080	}
bfictorie	0:8cdad1c73e8e	1081	GETSHORT(cishort, p);
bfictorie	0:8cdad1c73e8e	1082
bfictorie	0:8cdad1c73e8e	1083	if (!(cishort == IPCP_VJ_COMP \|\|
bfictorie	0:8cdad1c73e8e	1084	(cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
bfictorie	0:8cdad1c73e8e	1085	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
bfictorie	0:8cdad1c73e8e	1086	orc = CONFREJ;
bfictorie	0:8cdad1c73e8e	1087	break;
bfictorie	0:8cdad1c73e8e	1088	}
bfictorie	0:8cdad1c73e8e	1089
bfictorie	0:8cdad1c73e8e	1090	ho->neg_vj = 1;
bfictorie	0:8cdad1c73e8e	1091	ho->vj_protocol = cishort;
bfictorie	0:8cdad1c73e8e	1092	if (cilen == CILEN_VJ) {
bfictorie	0:8cdad1c73e8e	1093	GETCHAR(maxslotindex, p);
bfictorie	0:8cdad1c73e8e	1094	if (maxslotindex > ao->maxslotindex) {
bfictorie	0:8cdad1c73e8e	1095	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
bfictorie	0:8cdad1c73e8e	1096	orc = CONFNAK;
bfictorie	0:8cdad1c73e8e	1097	if (!reject_if_disagree) {
bfictorie	0:8cdad1c73e8e	1098	DECPTR(1, p);
bfictorie	0:8cdad1c73e8e	1099	PUTCHAR(ao->maxslotindex, p);
bfictorie	0:8cdad1c73e8e	1100	}
bfictorie	0:8cdad1c73e8e	1101	}
bfictorie	0:8cdad1c73e8e	1102	GETCHAR(cflag, p);
bfictorie	0:8cdad1c73e8e	1103	if (cflag && !ao->cflag) {
bfictorie	0:8cdad1c73e8e	1104	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
bfictorie	0:8cdad1c73e8e	1105	orc = CONFNAK;
bfictorie	0:8cdad1c73e8e	1106	if (!reject_if_disagree) {
bfictorie	0:8cdad1c73e8e	1107	DECPTR(1, p);
bfictorie	0:8cdad1c73e8e	1108	PUTCHAR(wo->cflag, p);
bfictorie	0:8cdad1c73e8e	1109	}
bfictorie	0:8cdad1c73e8e	1110	}
bfictorie	0:8cdad1c73e8e	1111	ho->maxslotindex = maxslotindex;
bfictorie	0:8cdad1c73e8e	1112	ho->cflag = cflag;
bfictorie	0:8cdad1c73e8e	1113	} else {
bfictorie	0:8cdad1c73e8e	1114	ho->old_vj = 1;
bfictorie	0:8cdad1c73e8e	1115	ho->maxslotindex = MAX_SLOTS - 1;
bfictorie	0:8cdad1c73e8e	1116	ho->cflag = 1;
bfictorie	0:8cdad1c73e8e	1117	}
bfictorie	0:8cdad1c73e8e	1118	IPCPDEBUG(LOG_INFO, (
bfictorie	0:8cdad1c73e8e	1119	"ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
bfictorie	0:8cdad1c73e8e	1120	ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
bfictorie	0:8cdad1c73e8e	1121	break;
bfictorie	0:8cdad1c73e8e	1122
bfictorie	0:8cdad1c73e8e	1123	default:
bfictorie	0:8cdad1c73e8e	1124	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
bfictorie	0:8cdad1c73e8e	1125	orc = CONFREJ;
bfictorie	0:8cdad1c73e8e	1126	break;
bfictorie	0:8cdad1c73e8e	1127	}
bfictorie	0:8cdad1c73e8e	1128
bfictorie	0:8cdad1c73e8e	1129	endswitch:
bfictorie	0:8cdad1c73e8e	1130	if (orc == CONFACK && /* Good CI */
bfictorie	0:8cdad1c73e8e	1131	rc != CONFACK) { /* but prior CI wasnt? */
bfictorie	0:8cdad1c73e8e	1132	continue; /* Don't send this one */
bfictorie	0:8cdad1c73e8e	1133	}
bfictorie	0:8cdad1c73e8e	1134
bfictorie	0:8cdad1c73e8e	1135	if (orc == CONFNAK) { /* Nak this CI? */
bfictorie	0:8cdad1c73e8e	1136	if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
bfictorie	0:8cdad1c73e8e	1137	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
bfictorie	0:8cdad1c73e8e	1138	orc = CONFREJ; /* Get tough if so */
bfictorie	0:8cdad1c73e8e	1139	} else {
bfictorie	0:8cdad1c73e8e	1140	if (rc == CONFREJ) { /* Rejecting prior CI? */
bfictorie	0:8cdad1c73e8e	1141	continue; /* Don't send this one */
bfictorie	0:8cdad1c73e8e	1142	}
bfictorie	0:8cdad1c73e8e	1143	if (rc == CONFACK) { /* Ack'd all prior CIs? */
bfictorie	0:8cdad1c73e8e	1144	rc = CONFNAK; /* Not anymore... */
bfictorie	0:8cdad1c73e8e	1145	ucp = inp; /* Backup */
bfictorie	0:8cdad1c73e8e	1146	}
bfictorie	0:8cdad1c73e8e	1147	}
bfictorie	0:8cdad1c73e8e	1148	}
bfictorie	0:8cdad1c73e8e	1149
bfictorie	0:8cdad1c73e8e	1150	if (orc == CONFREJ && /* Reject this CI */
bfictorie	0:8cdad1c73e8e	1151	rc != CONFREJ) { /* but no prior ones? */
bfictorie	0:8cdad1c73e8e	1152	rc = CONFREJ;
bfictorie	0:8cdad1c73e8e	1153	ucp = inp; /* Backup */
bfictorie	0:8cdad1c73e8e	1154	}
bfictorie	0:8cdad1c73e8e	1155
bfictorie	0:8cdad1c73e8e	1156	/* Need to move CI? */
bfictorie	0:8cdad1c73e8e	1157	if (ucp != cip) {
bfictorie	0:8cdad1c73e8e	1158	BCOPY(cip, ucp, cilen); /* Move it */
bfictorie	0:8cdad1c73e8e	1159	}
bfictorie	0:8cdad1c73e8e	1160
bfictorie	0:8cdad1c73e8e	1161	/* Update output pointer */
bfictorie	0:8cdad1c73e8e	1162	INCPTR(cilen, ucp);
bfictorie	0:8cdad1c73e8e	1163	}
bfictorie	0:8cdad1c73e8e	1164
bfictorie	0:8cdad1c73e8e	1165	/*
bfictorie	0:8cdad1c73e8e	1166	* If we aren't rejecting this packet, and we want to negotiate
bfictorie	0:8cdad1c73e8e	1167	* their address, and they didn't send their address, then we
bfictorie	0:8cdad1c73e8e	1168	* send a NAK with a CI_ADDR option appended. We assume the
bfictorie	0:8cdad1c73e8e	1169	* input buffer is long enough that we can append the extra
bfictorie	0:8cdad1c73e8e	1170	* option safely.
bfictorie	0:8cdad1c73e8e	1171	*/
bfictorie	0:8cdad1c73e8e	1172	if (rc != CONFREJ && !ho->neg_addr &&
bfictorie	0:8cdad1c73e8e	1173	wo->req_addr && !reject_if_disagree) {
bfictorie	0:8cdad1c73e8e	1174	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
bfictorie	0:8cdad1c73e8e	1175	if (rc == CONFACK) {
bfictorie	0:8cdad1c73e8e	1176	rc = CONFNAK;
bfictorie	0:8cdad1c73e8e	1177	ucp = inp; /* reset pointer */
bfictorie	0:8cdad1c73e8e	1178	wo->req_addr = 0; /* don't ask again */
bfictorie	0:8cdad1c73e8e	1179	}
bfictorie	0:8cdad1c73e8e	1180	PUTCHAR(CI_ADDR, ucp);
bfictorie	0:8cdad1c73e8e	1181	PUTCHAR(CILEN_ADDR, ucp);
bfictorie	0:8cdad1c73e8e	1182	tl = ntohl(wo->hisaddr);
bfictorie	0:8cdad1c73e8e	1183	PUTLONG(tl, ucp);
bfictorie	0:8cdad1c73e8e	1184	}
bfictorie	0:8cdad1c73e8e	1185
bfictorie	0:8cdad1c73e8e	1186	len = (int)(ucp - inp); / Compute output length */
bfictorie	0:8cdad1c73e8e	1187	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
bfictorie	0:8cdad1c73e8e	1188	return (rc); /* Return final code */
bfictorie	0:8cdad1c73e8e	1189	}
bfictorie	0:8cdad1c73e8e	1190
bfictorie	0:8cdad1c73e8e	1191
bfictorie	0:8cdad1c73e8e	1192	#if 0
bfictorie	0:8cdad1c73e8e	1193	/*
bfictorie	0:8cdad1c73e8e	1194	* ip_check_options - check that any IP-related options are OK,
bfictorie	0:8cdad1c73e8e	1195	* and assign appropriate defaults.
bfictorie	0:8cdad1c73e8e	1196	*/
bfictorie	0:8cdad1c73e8e	1197	static void
bfictorie	0:8cdad1c73e8e	1198	ip_check_options(u_long localAddr)
bfictorie	0:8cdad1c73e8e	1199	{
bfictorie	0:8cdad1c73e8e	1200	ipcp_options *wo = &ipcp_wantoptions[0];
bfictorie	0:8cdad1c73e8e	1201
bfictorie	0:8cdad1c73e8e	1202	/*
bfictorie	0:8cdad1c73e8e	1203	* Load our default IP address but allow the remote host to give us
bfictorie	0:8cdad1c73e8e	1204	* a new address.
bfictorie	0:8cdad1c73e8e	1205	*/
bfictorie	0:8cdad1c73e8e	1206	if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
bfictorie	0:8cdad1c73e8e	1207	wo->accept_local = 1; /* don't insist on this default value */
bfictorie	0:8cdad1c73e8e	1208	wo->ouraddr = htonl(localAddr);
bfictorie	0:8cdad1c73e8e	1209	}
bfictorie	0:8cdad1c73e8e	1210	}
bfictorie	0:8cdad1c73e8e	1211	#endif
bfictorie	0:8cdad1c73e8e	1212
bfictorie	0:8cdad1c73e8e	1213
bfictorie	0:8cdad1c73e8e	1214	/*
bfictorie	0:8cdad1c73e8e	1215	* ipcp_up - IPCP has come UP.
bfictorie	0:8cdad1c73e8e	1216	*
bfictorie	0:8cdad1c73e8e	1217	* Configure the IP network interface appropriately and bring it up.
bfictorie	0:8cdad1c73e8e	1218	*/
bfictorie	0:8cdad1c73e8e	1219	static void
bfictorie	0:8cdad1c73e8e	1220	ipcp_up(fsm *f)
bfictorie	0:8cdad1c73e8e	1221	{
bfictorie	0:8cdad1c73e8e	1222	u32_t mask;
bfictorie	0:8cdad1c73e8e	1223	ipcp_options *ho = &ipcp_hisoptions[f->unit];
bfictorie	0:8cdad1c73e8e	1224	ipcp_options *go = &ipcp_gotoptions[f->unit];
bfictorie	0:8cdad1c73e8e	1225	ipcp_options *wo = &ipcp_wantoptions[f->unit];
bfictorie	0:8cdad1c73e8e	1226
bfictorie	0:8cdad1c73e8e	1227	np_up(f->unit, PPP_IP);
bfictorie	0:8cdad1c73e8e	1228	IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
bfictorie	0:8cdad1c73e8e	1229
bfictorie	0:8cdad1c73e8e	1230	/*
bfictorie	0:8cdad1c73e8e	1231	* We must have a non-zero IP address for both ends of the link.
bfictorie	0:8cdad1c73e8e	1232	*/
bfictorie	0:8cdad1c73e8e	1233	if (!ho->neg_addr) {
bfictorie	0:8cdad1c73e8e	1234	ho->hisaddr = wo->hisaddr;
bfictorie	0:8cdad1c73e8e	1235	}
bfictorie	0:8cdad1c73e8e	1236	#ifdef __PPP_STRICT_IMPL__ //DG : Kludge for bad 3g providers PPP impl
bfictorie	0:8cdad1c73e8e	1237	if (ho->hisaddr == 0) {
bfictorie	0:8cdad1c73e8e	1238	IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
bfictorie	0:8cdad1c73e8e	1239	ipcp_close(f->unit, "Could not determine remote IP address");
bfictorie	0:8cdad1c73e8e	1240	return;
bfictorie	0:8cdad1c73e8e	1241	}
bfictorie	0:8cdad1c73e8e	1242	#endif
bfictorie	0:8cdad1c73e8e	1243	if (go->ouraddr == 0) {
bfictorie	0:8cdad1c73e8e	1244	IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
bfictorie	0:8cdad1c73e8e	1245	ipcp_close(f->unit, "Could not determine local IP address");
bfictorie	0:8cdad1c73e8e	1246	return;
bfictorie	0:8cdad1c73e8e	1247	}
bfictorie	0:8cdad1c73e8e	1248
bfictorie	0:8cdad1c73e8e	1249	if (ppp_settings.usepeerdns && (go->dnsaddr[0] \|\| go->dnsaddr[1])) {
bfictorie	0:8cdad1c73e8e	1250	/pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);/
bfictorie	0:8cdad1c73e8e	1251	}
bfictorie	0:8cdad1c73e8e	1252
bfictorie	0:8cdad1c73e8e	1253	/*
bfictorie	0:8cdad1c73e8e	1254	* Check that the peer is allowed to use the IP address it wants.
bfictorie	0:8cdad1c73e8e	1255	*/
bfictorie	0:8cdad1c73e8e	1256	if (!auth_ip_addr(f->unit, ho->hisaddr)) {
bfictorie	0:8cdad1c73e8e	1257	IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
bfictorie	0:8cdad1c73e8e	1258	inet_ntoa(ho->hisaddr)));
bfictorie	0:8cdad1c73e8e	1259	ipcp_close(f->unit, "Unauthorized remote IP address");
bfictorie	0:8cdad1c73e8e	1260	return;
bfictorie	0:8cdad1c73e8e	1261	}
bfictorie	0:8cdad1c73e8e	1262
bfictorie	0:8cdad1c73e8e	1263	/* set tcp compression */
bfictorie	0:8cdad1c73e8e	1264	sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
bfictorie	0:8cdad1c73e8e	1265
bfictorie	0:8cdad1c73e8e	1266	/*
bfictorie	0:8cdad1c73e8e	1267	* Set IP addresses and (if specified) netmask.
bfictorie	0:8cdad1c73e8e	1268	*/
bfictorie	0:8cdad1c73e8e	1269	mask = GetMask(go->ouraddr);
bfictorie	0:8cdad1c73e8e	1270
bfictorie	0:8cdad1c73e8e	1271	if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
bfictorie	0:8cdad1c73e8e	1272	IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
bfictorie	0:8cdad1c73e8e	1273	ipcp_close(f->unit, "Interface configuration failed");
bfictorie	0:8cdad1c73e8e	1274	return;
bfictorie	0:8cdad1c73e8e	1275	}
bfictorie	0:8cdad1c73e8e	1276
bfictorie	0:8cdad1c73e8e	1277	/* bring the interface up for IP */
bfictorie	0:8cdad1c73e8e	1278	if (!sifup(f->unit)) {
bfictorie	0:8cdad1c73e8e	1279	IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
bfictorie	0:8cdad1c73e8e	1280	ipcp_close(f->unit, "Interface configuration failed");
bfictorie	0:8cdad1c73e8e	1281	return;
bfictorie	0:8cdad1c73e8e	1282	}
bfictorie	0:8cdad1c73e8e	1283
bfictorie	0:8cdad1c73e8e	1284	sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
bfictorie	0:8cdad1c73e8e	1285
bfictorie	0:8cdad1c73e8e	1286	/* assign a default route through the interface if required */
bfictorie	0:8cdad1c73e8e	1287	if (ipcp_wantoptions[f->unit].default_route) {
bfictorie	0:8cdad1c73e8e	1288	if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
bfictorie	0:8cdad1c73e8e	1289	default_route_set[f->unit] = 1;
bfictorie	0:8cdad1c73e8e	1290	}
bfictorie	0:8cdad1c73e8e	1291	}
bfictorie	0:8cdad1c73e8e	1292
bfictorie	0:8cdad1c73e8e	1293	IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
bfictorie	0:8cdad1c73e8e	1294	IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
bfictorie	0:8cdad1c73e8e	1295	if (go->dnsaddr[0]) {
bfictorie	0:8cdad1c73e8e	1296	IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
bfictorie	0:8cdad1c73e8e	1297	}
bfictorie	0:8cdad1c73e8e	1298	if (go->dnsaddr[1]) {
bfictorie	0:8cdad1c73e8e	1299	IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
bfictorie	0:8cdad1c73e8e	1300	}
bfictorie	0:8cdad1c73e8e	1301	}
bfictorie	0:8cdad1c73e8e	1302
bfictorie	0:8cdad1c73e8e	1303
bfictorie	0:8cdad1c73e8e	1304	/*
bfictorie	0:8cdad1c73e8e	1305	* ipcp_down - IPCP has gone DOWN.
bfictorie	0:8cdad1c73e8e	1306	*
bfictorie	0:8cdad1c73e8e	1307	* Take the IP network interface down, clear its addresses
bfictorie	0:8cdad1c73e8e	1308	* and delete routes through it.
bfictorie	0:8cdad1c73e8e	1309	*/
bfictorie	0:8cdad1c73e8e	1310	static void
bfictorie	0:8cdad1c73e8e	1311	ipcp_down(fsm *f)
bfictorie	0:8cdad1c73e8e	1312	{
bfictorie	0:8cdad1c73e8e	1313	IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
bfictorie	0:8cdad1c73e8e	1314	np_down(f->unit, PPP_IP);
bfictorie	0:8cdad1c73e8e	1315	sifvjcomp(f->unit, 0, 0, 0);
bfictorie	0:8cdad1c73e8e	1316
bfictorie	0:8cdad1c73e8e	1317	sifdown(f->unit);
bfictorie	0:8cdad1c73e8e	1318	ipcp_clear_addrs(f->unit);
bfictorie	0:8cdad1c73e8e	1319	}
bfictorie	0:8cdad1c73e8e	1320
bfictorie	0:8cdad1c73e8e	1321
bfictorie	0:8cdad1c73e8e	1322	/*
bfictorie	0:8cdad1c73e8e	1323	* ipcp_clear_addrs() - clear the interface addresses, routes, etc.
bfictorie	0:8cdad1c73e8e	1324	*/
bfictorie	0:8cdad1c73e8e	1325	static void
bfictorie	0:8cdad1c73e8e	1326	ipcp_clear_addrs(int unit)
bfictorie	0:8cdad1c73e8e	1327	{
bfictorie	0:8cdad1c73e8e	1328	u32_t ouraddr, hisaddr;
bfictorie	0:8cdad1c73e8e	1329
bfictorie	0:8cdad1c73e8e	1330	ouraddr = ipcp_gotoptions[unit].ouraddr;
bfictorie	0:8cdad1c73e8e	1331	hisaddr = ipcp_hisoptions[unit].hisaddr;
bfictorie	0:8cdad1c73e8e	1332	if (default_route_set[unit]) {
bfictorie	0:8cdad1c73e8e	1333	cifdefaultroute(unit, ouraddr, hisaddr);
bfictorie	0:8cdad1c73e8e	1334	default_route_set[unit] = 0;
bfictorie	0:8cdad1c73e8e	1335	}
bfictorie	0:8cdad1c73e8e	1336	cifaddr(unit, ouraddr, hisaddr);
bfictorie	0:8cdad1c73e8e	1337	}
bfictorie	0:8cdad1c73e8e	1338
bfictorie	0:8cdad1c73e8e	1339
bfictorie	0:8cdad1c73e8e	1340	/*
bfictorie	0:8cdad1c73e8e	1341	* ipcp_finished - possibly shut down the lower layers.
bfictorie	0:8cdad1c73e8e	1342	*/
bfictorie	0:8cdad1c73e8e	1343	static void
bfictorie	0:8cdad1c73e8e	1344	ipcp_finished(fsm *f)
bfictorie	0:8cdad1c73e8e	1345	{
bfictorie	0:8cdad1c73e8e	1346	np_finished(f->unit, PPP_IP);
bfictorie	0:8cdad1c73e8e	1347	}
bfictorie	0:8cdad1c73e8e	1348
bfictorie	0:8cdad1c73e8e	1349	#if PPP_ADDITIONAL_CALLBACKS
bfictorie	0:8cdad1c73e8e	1350	static int
bfictorie	0:8cdad1c73e8e	1351	ipcp_printpkt(u_char p, int plen, void (printer) (void , char , ...), void *arg)
bfictorie	0:8cdad1c73e8e	1352	{
bfictorie	0:8cdad1c73e8e	1353	LWIP_UNUSED_ARG(p);
bfictorie	0:8cdad1c73e8e	1354	LWIP_UNUSED_ARG(plen);
bfictorie	0:8cdad1c73e8e	1355	LWIP_UNUSED_ARG(printer);
bfictorie	0:8cdad1c73e8e	1356	LWIP_UNUSED_ARG(arg);
bfictorie	0:8cdad1c73e8e	1357	return 0;
bfictorie	0:8cdad1c73e8e	1358	}
bfictorie	0:8cdad1c73e8e	1359
bfictorie	0:8cdad1c73e8e	1360	/*
bfictorie	0:8cdad1c73e8e	1361	* ip_active_pkt - see if this IP packet is worth bringing the link up for.
bfictorie	0:8cdad1c73e8e	1362	* We don't bring the link up for IP fragments or for TCP FIN packets
bfictorie	0:8cdad1c73e8e	1363	* with no data.
bfictorie	0:8cdad1c73e8e	1364	*/
bfictorie	0:8cdad1c73e8e	1365	#define IP_HDRLEN 20 /* bytes */
bfictorie	0:8cdad1c73e8e	1366	#define IP_OFFMASK 0x1fff
bfictorie	0:8cdad1c73e8e	1367	#define IPPROTO_TCP 6
bfictorie	0:8cdad1c73e8e	1368	#define TCP_HDRLEN 20
bfictorie	0:8cdad1c73e8e	1369	#define TH_FIN 0x01
bfictorie	0:8cdad1c73e8e	1370
bfictorie	0:8cdad1c73e8e	1371	/*
bfictorie	0:8cdad1c73e8e	1372	* We use these macros because the IP header may be at an odd address,
bfictorie	0:8cdad1c73e8e	1373	* and some compilers might use word loads to get th_off or ip_hl.
bfictorie	0:8cdad1c73e8e	1374	*/
bfictorie	0:8cdad1c73e8e	1375
bfictorie	0:8cdad1c73e8e	1376	#define net_short(x) (((x)[0] << 8) + (x)[1])
bfictorie	0:8cdad1c73e8e	1377	#define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
bfictorie	0:8cdad1c73e8e	1378	#define get_ipoff(x) net_short((unsigned char *)(x) + 6)
bfictorie	0:8cdad1c73e8e	1379	#define get_ipproto(x) (((unsigned char *)(x))[9])
bfictorie	0:8cdad1c73e8e	1380	#define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
bfictorie	0:8cdad1c73e8e	1381	#define get_tcpflags(x) (((unsigned char *)(x))[13])
bfictorie	0:8cdad1c73e8e	1382
bfictorie	0:8cdad1c73e8e	1383	static int
bfictorie	0:8cdad1c73e8e	1384	ip_active_pkt(u_char *pkt, int len)
bfictorie	0:8cdad1c73e8e	1385	{
bfictorie	0:8cdad1c73e8e	1386	u_char *tcp;
bfictorie	0:8cdad1c73e8e	1387	int hlen;
bfictorie	0:8cdad1c73e8e	1388
bfictorie	0:8cdad1c73e8e	1389	len -= PPP_HDRLEN;
bfictorie	0:8cdad1c73e8e	1390	pkt += PPP_HDRLEN;
bfictorie	0:8cdad1c73e8e	1391	if (len < IP_HDRLEN) {
bfictorie	0:8cdad1c73e8e	1392	return 0;
bfictorie	0:8cdad1c73e8e	1393	}
bfictorie	0:8cdad1c73e8e	1394	if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
bfictorie	0:8cdad1c73e8e	1395	return 0;
bfictorie	0:8cdad1c73e8e	1396	}
bfictorie	0:8cdad1c73e8e	1397	if (get_ipproto(pkt) != IPPROTO_TCP) {
bfictorie	0:8cdad1c73e8e	1398	return 1;
bfictorie	0:8cdad1c73e8e	1399	}
bfictorie	0:8cdad1c73e8e	1400	hlen = get_iphl(pkt) * 4;
bfictorie	0:8cdad1c73e8e	1401	if (len < hlen + TCP_HDRLEN) {
bfictorie	0:8cdad1c73e8e	1402	return 0;
bfictorie	0:8cdad1c73e8e	1403	}
bfictorie	0:8cdad1c73e8e	1404	tcp = pkt + hlen;
bfictorie	0:8cdad1c73e8e	1405	if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
bfictorie	0:8cdad1c73e8e	1406	return 0;
bfictorie	0:8cdad1c73e8e	1407	}
bfictorie	0:8cdad1c73e8e	1408	return 1;
bfictorie	0:8cdad1c73e8e	1409	}
bfictorie	0:8cdad1c73e8e	1410	#endif /* PPP_ADDITIONAL_CALLBACKS */
bfictorie	0:8cdad1c73e8e	1411
bfictorie	0:8cdad1c73e8e	1412	#endif /* PPP_SUPPORT */

Repository toolbox

Repository details

Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	25 Mar 2012
Imports:	10
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	1

Important changes to repositories hosted on mbed.com

NetServices/lwip/netif/ppp/ipcp.c@0:8cdad1c73e8e, 2012-03-25 (annotated)

Who changed what in which revision?

Repository toolbox

Repository details

Important Information for this Arm website

Important changes to repositories hosted on mbed.com

NetServices/lwip/netif/ppp/ipcp.c@0:8cdad1c73e8e, 2012-03-25 (annotated)

Who changed what in which revision?

Repository toolbox

Repository details

Important Information for this Arm website

Access Warning