NetServicesMod - Modified version of NetServices. Fixes an issue w…

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Modified version of NetServices. Fixes an issue where connections failed should the HTTP response status line be received in a packet on its own prior to any further headers. Changes are made to the HTTPClient.cpp file's readHeaders method.

lwip/netif/ppp/ipcp.c@0:ec559500a63f, 2011-04-08 (annotated)

Committer:: andrewbonney
Date:: Fri Apr 08 14:39:41 2011 +0000
Revision:: 0:ec559500a63f

Who changed what in which revision?

User	Revision	Line number	New contents of line
andrewbonney	0:ec559500a63f	1	/** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
andrewbonney	0:ec559500a63f	2	dial-on-demand has been stripped. */
andrewbonney	0:ec559500a63f	3	/*****************************************************************************
andrewbonney	0:ec559500a63f	4	* ipcp.c - Network PPP IP Control Protocol program file.
andrewbonney	0:ec559500a63f	5	*
andrewbonney	0:ec559500a63f	6	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
andrewbonney	0:ec559500a63f	7	* portions Copyright (c) 1997 by Global Election Systems Inc.
andrewbonney	0:ec559500a63f	8	*
andrewbonney	0:ec559500a63f	9	* The authors hereby grant permission to use, copy, modify, distribute,
andrewbonney	0:ec559500a63f	10	* and license this software and its documentation for any purpose, provided
andrewbonney	0:ec559500a63f	11	* that existing copyright notices are retained in all copies and that this
andrewbonney	0:ec559500a63f	12	* notice and the following disclaimer are included verbatim in any
andrewbonney	0:ec559500a63f	13	* distributions. No written agreement, license, or royalty fee is required
andrewbonney	0:ec559500a63f	14	* for any of the authorized uses.
andrewbonney	0:ec559500a63f	15	*
andrewbonney	0:ec559500a63f	16	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
andrewbonney	0:ec559500a63f	17	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
andrewbonney	0:ec559500a63f	18	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
andrewbonney	0:ec559500a63f	19	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
andrewbonney	0:ec559500a63f	20	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
andrewbonney	0:ec559500a63f	21	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
andrewbonney	0:ec559500a63f	22	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
andrewbonney	0:ec559500a63f	23	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
andrewbonney	0:ec559500a63f	24	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
andrewbonney	0:ec559500a63f	25	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
andrewbonney	0:ec559500a63f	26	*
andrewbonney	0:ec559500a63f	27	******************************************************************************
andrewbonney	0:ec559500a63f	28	* REVISION HISTORY
andrewbonney	0:ec559500a63f	29	*
andrewbonney	0:ec559500a63f	30	* 03-01-01 Marc Boucher <marc@mbsi.ca>
andrewbonney	0:ec559500a63f	31	* Ported to lwIP.
andrewbonney	0:ec559500a63f	32	* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
andrewbonney	0:ec559500a63f	33	* Original.
andrewbonney	0:ec559500a63f	34	*****************************************************************************/
andrewbonney	0:ec559500a63f	35	/*
andrewbonney	0:ec559500a63f	36	* ipcp.c - PPP IP Control Protocol.
andrewbonney	0:ec559500a63f	37	*
andrewbonney	0:ec559500a63f	38	* Copyright (c) 1989 Carnegie Mellon University.
andrewbonney	0:ec559500a63f	39	* All rights reserved.
andrewbonney	0:ec559500a63f	40	*
andrewbonney	0:ec559500a63f	41	* Redistribution and use in source and binary forms are permitted
andrewbonney	0:ec559500a63f	42	* provided that the above copyright notice and this paragraph are
andrewbonney	0:ec559500a63f	43	* duplicated in all such forms and that any documentation,
andrewbonney	0:ec559500a63f	44	* advertising materials, and other materials related to such
andrewbonney	0:ec559500a63f	45	* distribution and use acknowledge that the software was developed
andrewbonney	0:ec559500a63f	46	* by Carnegie Mellon University. The name of the
andrewbonney	0:ec559500a63f	47	* University may not be used to endorse or promote products derived
andrewbonney	0:ec559500a63f	48	* from this software without specific prior written permission.
andrewbonney	0:ec559500a63f	49	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
andrewbonney	0:ec559500a63f	50	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
andrewbonney	0:ec559500a63f	51	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
andrewbonney	0:ec559500a63f	52	*/
andrewbonney	0:ec559500a63f	53
andrewbonney	0:ec559500a63f	54	#include "lwip/opt.h"
andrewbonney	0:ec559500a63f	55
andrewbonney	0:ec559500a63f	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
andrewbonney	0:ec559500a63f	57
andrewbonney	0:ec559500a63f	58	#include "ppp.h"
andrewbonney	0:ec559500a63f	59	#include "pppdebug.h"
andrewbonney	0:ec559500a63f	60
andrewbonney	0:ec559500a63f	61	#include "auth.h"
andrewbonney	0:ec559500a63f	62	#include "fsm.h"
andrewbonney	0:ec559500a63f	63	#include "vj.h"
andrewbonney	0:ec559500a63f	64	#include "ipcp.h"
andrewbonney	0:ec559500a63f	65
andrewbonney	0:ec559500a63f	66	#include "lwip/inet.h"
andrewbonney	0:ec559500a63f	67
andrewbonney	0:ec559500a63f	68	#include <string.h>
andrewbonney	0:ec559500a63f	69
andrewbonney	0:ec559500a63f	70	/* #define OLD_CI_ADDRS 1 / / Support deprecated address negotiation. */
andrewbonney	0:ec559500a63f	71
andrewbonney	0:ec559500a63f	72	/* global vars */
andrewbonney	0:ec559500a63f	73	ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
andrewbonney	0:ec559500a63f	74	ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
andrewbonney	0:ec559500a63f	75	ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
andrewbonney	0:ec559500a63f	76	ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
andrewbonney	0:ec559500a63f	77
andrewbonney	0:ec559500a63f	78	/* local vars */
andrewbonney	0:ec559500a63f	79	static int default_route_set[NUM_PPP]; /* Have set up a default route */
andrewbonney	0:ec559500a63f	80	static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
andrewbonney	0:ec559500a63f	81
andrewbonney	0:ec559500a63f	82
andrewbonney	0:ec559500a63f	83	/*
andrewbonney	0:ec559500a63f	84	* Callbacks for fsm code. (CI = Configuration Information)
andrewbonney	0:ec559500a63f	85	*/
andrewbonney	0:ec559500a63f	86	static void ipcp_resetci (fsm ); / Reset our CI */
andrewbonney	0:ec559500a63f	87	static int ipcp_cilen (fsm ); / Return length of our CI */
andrewbonney	0:ec559500a63f	88	static void ipcp_addci (fsm , u_char , int ); / Add our CI */
andrewbonney	0:ec559500a63f	89	static int ipcp_ackci (fsm , u_char , int); /* Peer ack'd our CI */
andrewbonney	0:ec559500a63f	90	static int ipcp_nakci (fsm , u_char , int); /* Peer nak'd our CI */
andrewbonney	0:ec559500a63f	91	static int ipcp_rejci (fsm , u_char , int); /* Peer rej'd our CI */
andrewbonney	0:ec559500a63f	92	static int ipcp_reqci (fsm , u_char , int , int); / Rcv CI */
andrewbonney	0:ec559500a63f	93	static void ipcp_up (fsm ); / We're UP */
andrewbonney	0:ec559500a63f	94	static void ipcp_down (fsm ); / We're DOWN */
andrewbonney	0:ec559500a63f	95	#if PPP_ADDITIONAL_CALLBACKS
andrewbonney	0:ec559500a63f	96	static void ipcp_script (fsm , char ); /* Run an up/down script */
andrewbonney	0:ec559500a63f	97	#endif
andrewbonney	0:ec559500a63f	98	static void ipcp_finished (fsm ); / Don't need lower layer */
andrewbonney	0:ec559500a63f	99
andrewbonney	0:ec559500a63f	100
andrewbonney	0:ec559500a63f	101	fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
andrewbonney	0:ec559500a63f	102
andrewbonney	0:ec559500a63f	103
andrewbonney	0:ec559500a63f	104	static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
andrewbonney	0:ec559500a63f	105	ipcp_resetci, /* Reset our Configuration Information */
andrewbonney	0:ec559500a63f	106	ipcp_cilen, /* Length of our Configuration Information */
andrewbonney	0:ec559500a63f	107	ipcp_addci, /* Add our Configuration Information */
andrewbonney	0:ec559500a63f	108	ipcp_ackci, /* ACK our Configuration Information */
andrewbonney	0:ec559500a63f	109	ipcp_nakci, /* NAK our Configuration Information */
andrewbonney	0:ec559500a63f	110	ipcp_rejci, /* Reject our Configuration Information */
andrewbonney	0:ec559500a63f	111	ipcp_reqci, /* Request peer's Configuration Information */
andrewbonney	0:ec559500a63f	112	ipcp_up, /* Called when fsm reaches LS_OPENED state */
andrewbonney	0:ec559500a63f	113	ipcp_down, /* Called when fsm leaves LS_OPENED state */
andrewbonney	0:ec559500a63f	114	NULL, /* Called when we want the lower layer up */
andrewbonney	0:ec559500a63f	115	ipcp_finished, /* Called when we want the lower layer down */
andrewbonney	0:ec559500a63f	116	NULL, /* Called when Protocol-Reject received */
andrewbonney	0:ec559500a63f	117	NULL, /* Retransmission is necessary */
andrewbonney	0:ec559500a63f	118	NULL, /* Called to handle protocol-specific codes */
andrewbonney	0:ec559500a63f	119	"IPCP" /* String name of protocol */
andrewbonney	0:ec559500a63f	120	};
andrewbonney	0:ec559500a63f	121
andrewbonney	0:ec559500a63f	122	/*
andrewbonney	0:ec559500a63f	123	* Protocol entry points from main code.
andrewbonney	0:ec559500a63f	124	*/
andrewbonney	0:ec559500a63f	125	static void ipcp_init (int);
andrewbonney	0:ec559500a63f	126	static void ipcp_open (int);
andrewbonney	0:ec559500a63f	127	static void ipcp_close (int, char *);
andrewbonney	0:ec559500a63f	128	static void ipcp_lowerup (int);
andrewbonney	0:ec559500a63f	129	static void ipcp_lowerdown (int);
andrewbonney	0:ec559500a63f	130	static void ipcp_input (int, u_char *, int);
andrewbonney	0:ec559500a63f	131	static void ipcp_protrej (int);
andrewbonney	0:ec559500a63f	132
andrewbonney	0:ec559500a63f	133
andrewbonney	0:ec559500a63f	134	struct protent ipcp_protent = {
andrewbonney	0:ec559500a63f	135	PPP_IPCP,
andrewbonney	0:ec559500a63f	136	ipcp_init,
andrewbonney	0:ec559500a63f	137	ipcp_input,
andrewbonney	0:ec559500a63f	138	ipcp_protrej,
andrewbonney	0:ec559500a63f	139	ipcp_lowerup,
andrewbonney	0:ec559500a63f	140	ipcp_lowerdown,
andrewbonney	0:ec559500a63f	141	ipcp_open,
andrewbonney	0:ec559500a63f	142	ipcp_close,
andrewbonney	0:ec559500a63f	143	#if PPP_ADDITIONAL_CALLBACKS
andrewbonney	0:ec559500a63f	144	ipcp_printpkt,
andrewbonney	0:ec559500a63f	145	NULL,
andrewbonney	0:ec559500a63f	146	#endif /* PPP_ADDITIONAL_CALLBACKS */
andrewbonney	0:ec559500a63f	147	1,
andrewbonney	0:ec559500a63f	148	"IPCP",
andrewbonney	0:ec559500a63f	149	#if PPP_ADDITIONAL_CALLBACKS
andrewbonney	0:ec559500a63f	150	ip_check_options,
andrewbonney	0:ec559500a63f	151	NULL,
andrewbonney	0:ec559500a63f	152	ip_active_pkt
andrewbonney	0:ec559500a63f	153	#endif /* PPP_ADDITIONAL_CALLBACKS */
andrewbonney	0:ec559500a63f	154	};
andrewbonney	0:ec559500a63f	155
andrewbonney	0:ec559500a63f	156	static void ipcp_clear_addrs (int);
andrewbonney	0:ec559500a63f	157
andrewbonney	0:ec559500a63f	158	/*
andrewbonney	0:ec559500a63f	159	* Lengths of configuration options.
andrewbonney	0:ec559500a63f	160	*/
andrewbonney	0:ec559500a63f	161	#define CILEN_VOID 2
andrewbonney	0:ec559500a63f	162	#define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
andrewbonney	0:ec559500a63f	163	#define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
andrewbonney	0:ec559500a63f	164	#define CILEN_ADDR 6 /* new-style single address option */
andrewbonney	0:ec559500a63f	165	#define CILEN_ADDRS 10 /* old-style dual address option */
andrewbonney	0:ec559500a63f	166
andrewbonney	0:ec559500a63f	167
andrewbonney	0:ec559500a63f	168	#define CODENAME(x) ((x) == CONFACK ? "ACK" : \
andrewbonney	0:ec559500a63f	169	(x) == CONFNAK ? "NAK" : "REJ")
andrewbonney	0:ec559500a63f	170
andrewbonney	0:ec559500a63f	171
andrewbonney	0:ec559500a63f	172	/*
andrewbonney	0:ec559500a63f	173	* ipcp_init - Initialize IPCP.
andrewbonney	0:ec559500a63f	174	*/
andrewbonney	0:ec559500a63f	175	static void
andrewbonney	0:ec559500a63f	176	ipcp_init(int unit)
andrewbonney	0:ec559500a63f	177	{
andrewbonney	0:ec559500a63f	178	fsm *f = &ipcp_fsm[unit];
andrewbonney	0:ec559500a63f	179	ipcp_options *wo = &ipcp_wantoptions[unit];
andrewbonney	0:ec559500a63f	180	ipcp_options *ao = &ipcp_allowoptions[unit];
andrewbonney	0:ec559500a63f	181
andrewbonney	0:ec559500a63f	182	f->unit = unit;
andrewbonney	0:ec559500a63f	183	f->protocol = PPP_IPCP;
andrewbonney	0:ec559500a63f	184	f->callbacks = &ipcp_callbacks;
andrewbonney	0:ec559500a63f	185	fsm_init(&ipcp_fsm[unit]);
andrewbonney	0:ec559500a63f	186
andrewbonney	0:ec559500a63f	187	memset(wo, 0, sizeof(*wo));
andrewbonney	0:ec559500a63f	188	memset(ao, 0, sizeof(*ao));
andrewbonney	0:ec559500a63f	189
andrewbonney	0:ec559500a63f	190	wo->neg_addr = 1;
andrewbonney	0:ec559500a63f	191	wo->ouraddr = 0;
andrewbonney	0:ec559500a63f	192	#if VJ_SUPPORT
andrewbonney	0:ec559500a63f	193	wo->neg_vj = 1;
andrewbonney	0:ec559500a63f	194	#else /* VJ_SUPPORT */
andrewbonney	0:ec559500a63f	195	wo->neg_vj = 0;
andrewbonney	0:ec559500a63f	196	#endif /* VJ_SUPPORT */
andrewbonney	0:ec559500a63f	197	wo->vj_protocol = IPCP_VJ_COMP;
andrewbonney	0:ec559500a63f	198	wo->maxslotindex = MAX_SLOTS - 1;
andrewbonney	0:ec559500a63f	199	wo->cflag = 0;
andrewbonney	0:ec559500a63f	200	wo->default_route = 1;
andrewbonney	0:ec559500a63f	201
andrewbonney	0:ec559500a63f	202	ao->neg_addr = 1;
andrewbonney	0:ec559500a63f	203	#if VJ_SUPPORT
andrewbonney	0:ec559500a63f	204	ao->neg_vj = 1;
andrewbonney	0:ec559500a63f	205	#else /* VJ_SUPPORT */
andrewbonney	0:ec559500a63f	206	ao->neg_vj = 0;
andrewbonney	0:ec559500a63f	207	#endif /* VJ_SUPPORT */
andrewbonney	0:ec559500a63f	208	ao->maxslotindex = MAX_SLOTS - 1;
andrewbonney	0:ec559500a63f	209	ao->cflag = 1;
andrewbonney	0:ec559500a63f	210	ao->default_route = 1;
andrewbonney	0:ec559500a63f	211	}
andrewbonney	0:ec559500a63f	212
andrewbonney	0:ec559500a63f	213
andrewbonney	0:ec559500a63f	214	/*
andrewbonney	0:ec559500a63f	215	* ipcp_open - IPCP is allowed to come up.
andrewbonney	0:ec559500a63f	216	*/
andrewbonney	0:ec559500a63f	217	static void
andrewbonney	0:ec559500a63f	218	ipcp_open(int unit)
andrewbonney	0:ec559500a63f	219	{
andrewbonney	0:ec559500a63f	220	fsm_open(&ipcp_fsm[unit]);
andrewbonney	0:ec559500a63f	221	}
andrewbonney	0:ec559500a63f	222
andrewbonney	0:ec559500a63f	223
andrewbonney	0:ec559500a63f	224	/*
andrewbonney	0:ec559500a63f	225	* ipcp_close - Take IPCP down.
andrewbonney	0:ec559500a63f	226	*/
andrewbonney	0:ec559500a63f	227	static void
andrewbonney	0:ec559500a63f	228	ipcp_close(int unit, char *reason)
andrewbonney	0:ec559500a63f	229	{
andrewbonney	0:ec559500a63f	230	fsm_close(&ipcp_fsm[unit], reason);
andrewbonney	0:ec559500a63f	231	}
andrewbonney	0:ec559500a63f	232
andrewbonney	0:ec559500a63f	233
andrewbonney	0:ec559500a63f	234	/*
andrewbonney	0:ec559500a63f	235	* ipcp_lowerup - The lower layer is up.
andrewbonney	0:ec559500a63f	236	*/
andrewbonney	0:ec559500a63f	237	static void
andrewbonney	0:ec559500a63f	238	ipcp_lowerup(int unit)
andrewbonney	0:ec559500a63f	239	{
andrewbonney	0:ec559500a63f	240	fsm_lowerup(&ipcp_fsm[unit]);
andrewbonney	0:ec559500a63f	241	}
andrewbonney	0:ec559500a63f	242
andrewbonney	0:ec559500a63f	243
andrewbonney	0:ec559500a63f	244	/*
andrewbonney	0:ec559500a63f	245	* ipcp_lowerdown - The lower layer is down.
andrewbonney	0:ec559500a63f	246	*/
andrewbonney	0:ec559500a63f	247	static void
andrewbonney	0:ec559500a63f	248	ipcp_lowerdown(int unit)
andrewbonney	0:ec559500a63f	249	{
andrewbonney	0:ec559500a63f	250	fsm_lowerdown(&ipcp_fsm[unit]);
andrewbonney	0:ec559500a63f	251	}
andrewbonney	0:ec559500a63f	252
andrewbonney	0:ec559500a63f	253
andrewbonney	0:ec559500a63f	254	/*
andrewbonney	0:ec559500a63f	255	* ipcp_input - Input IPCP packet.
andrewbonney	0:ec559500a63f	256	*/
andrewbonney	0:ec559500a63f	257	static void
andrewbonney	0:ec559500a63f	258	ipcp_input(int unit, u_char *p, int len)
andrewbonney	0:ec559500a63f	259	{
andrewbonney	0:ec559500a63f	260	fsm_input(&ipcp_fsm[unit], p, len);
andrewbonney	0:ec559500a63f	261	}
andrewbonney	0:ec559500a63f	262
andrewbonney	0:ec559500a63f	263
andrewbonney	0:ec559500a63f	264	/*
andrewbonney	0:ec559500a63f	265	* ipcp_protrej - A Protocol-Reject was received for IPCP.
andrewbonney	0:ec559500a63f	266	*
andrewbonney	0:ec559500a63f	267	* Pretend the lower layer went down, so we shut up.
andrewbonney	0:ec559500a63f	268	*/
andrewbonney	0:ec559500a63f	269	static void
andrewbonney	0:ec559500a63f	270	ipcp_protrej(int unit)
andrewbonney	0:ec559500a63f	271	{
andrewbonney	0:ec559500a63f	272	fsm_lowerdown(&ipcp_fsm[unit]);
andrewbonney	0:ec559500a63f	273	}
andrewbonney	0:ec559500a63f	274
andrewbonney	0:ec559500a63f	275
andrewbonney	0:ec559500a63f	276	/*
andrewbonney	0:ec559500a63f	277	* ipcp_resetci - Reset our CI.
andrewbonney	0:ec559500a63f	278	*/
andrewbonney	0:ec559500a63f	279	static void
andrewbonney	0:ec559500a63f	280	ipcp_resetci(fsm *f)
andrewbonney	0:ec559500a63f	281	{
andrewbonney	0:ec559500a63f	282	ipcp_options *wo = &ipcp_wantoptions[f->unit];
andrewbonney	0:ec559500a63f	283
andrewbonney	0:ec559500a63f	284	wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
andrewbonney	0:ec559500a63f	285	if (wo->ouraddr == 0) {
andrewbonney	0:ec559500a63f	286	wo->accept_local = 1;
andrewbonney	0:ec559500a63f	287	}
andrewbonney	0:ec559500a63f	288	if (wo->hisaddr == 0) {
andrewbonney	0:ec559500a63f	289	wo->accept_remote = 1;
andrewbonney	0:ec559500a63f	290	}
andrewbonney	0:ec559500a63f	291	/* Request DNS addresses from the peer */
andrewbonney	0:ec559500a63f	292	wo->req_dns1 = ppp_settings.usepeerdns;
andrewbonney	0:ec559500a63f	293	wo->req_dns2 = ppp_settings.usepeerdns;
andrewbonney	0:ec559500a63f	294	ipcp_gotoptions[f->unit] = *wo;
andrewbonney	0:ec559500a63f	295	cis_received[f->unit] = 0;
andrewbonney	0:ec559500a63f	296	}
andrewbonney	0:ec559500a63f	297
andrewbonney	0:ec559500a63f	298
andrewbonney	0:ec559500a63f	299	/*
andrewbonney	0:ec559500a63f	300	* ipcp_cilen - Return length of our CI.
andrewbonney	0:ec559500a63f	301	*/
andrewbonney	0:ec559500a63f	302	static int
andrewbonney	0:ec559500a63f	303	ipcp_cilen(fsm *f)
andrewbonney	0:ec559500a63f	304	{
andrewbonney	0:ec559500a63f	305	ipcp_options *go = &ipcp_gotoptions[f->unit];
andrewbonney	0:ec559500a63f	306	ipcp_options *wo = &ipcp_wantoptions[f->unit];
andrewbonney	0:ec559500a63f	307	ipcp_options *ho = &ipcp_hisoptions[f->unit];
andrewbonney	0:ec559500a63f	308
andrewbonney	0:ec559500a63f	309	#define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
andrewbonney	0:ec559500a63f	310	#define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
andrewbonney	0:ec559500a63f	311	#define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
andrewbonney	0:ec559500a63f	312
andrewbonney	0:ec559500a63f	313	/*
andrewbonney	0:ec559500a63f	314	* First see if we want to change our options to the old
andrewbonney	0:ec559500a63f	315	* forms because we have received old forms from the peer.
andrewbonney	0:ec559500a63f	316	*/
andrewbonney	0:ec559500a63f	317	if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
andrewbonney	0:ec559500a63f	318	/* use the old style of address negotiation */
andrewbonney	0:ec559500a63f	319	go->neg_addr = 1;
andrewbonney	0:ec559500a63f	320	go->old_addrs = 1;
andrewbonney	0:ec559500a63f	321	}
andrewbonney	0:ec559500a63f	322	if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
andrewbonney	0:ec559500a63f	323	/* try an older style of VJ negotiation */
andrewbonney	0:ec559500a63f	324	if (cis_received[f->unit] == 0) {
andrewbonney	0:ec559500a63f	325	/* keep trying the new style until we see some CI from the peer */
andrewbonney	0:ec559500a63f	326	go->neg_vj = 1;
andrewbonney	0:ec559500a63f	327	} else {
andrewbonney	0:ec559500a63f	328	/* use the old style only if the peer did */
andrewbonney	0:ec559500a63f	329	if (ho->neg_vj && ho->old_vj) {
andrewbonney	0:ec559500a63f	330	go->neg_vj = 1;
andrewbonney	0:ec559500a63f	331	go->old_vj = 1;
andrewbonney	0:ec559500a63f	332	go->vj_protocol = ho->vj_protocol;
andrewbonney	0:ec559500a63f	333	}
andrewbonney	0:ec559500a63f	334	}
andrewbonney	0:ec559500a63f	335	}
andrewbonney	0:ec559500a63f	336
andrewbonney	0:ec559500a63f	337	return (LENCIADDR(go->neg_addr, go->old_addrs) +
andrewbonney	0:ec559500a63f	338	LENCIVJ(go->neg_vj, go->old_vj) +
andrewbonney	0:ec559500a63f	339	LENCIDNS(go->req_dns1) +
andrewbonney	0:ec559500a63f	340	LENCIDNS(go->req_dns2));
andrewbonney	0:ec559500a63f	341	}
andrewbonney	0:ec559500a63f	342
andrewbonney	0:ec559500a63f	343
andrewbonney	0:ec559500a63f	344	/*
andrewbonney	0:ec559500a63f	345	* ipcp_addci - Add our desired CIs to a packet.
andrewbonney	0:ec559500a63f	346	*/
andrewbonney	0:ec559500a63f	347	static void
andrewbonney	0:ec559500a63f	348	ipcp_addci(fsm f, u_char ucp, int *lenp)
andrewbonney	0:ec559500a63f	349	{
andrewbonney	0:ec559500a63f	350	ipcp_options *go = &ipcp_gotoptions[f->unit];
andrewbonney	0:ec559500a63f	351	int len = *lenp;
andrewbonney	0:ec559500a63f	352
andrewbonney	0:ec559500a63f	353	#define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
andrewbonney	0:ec559500a63f	354	if (neg) { \
andrewbonney	0:ec559500a63f	355	int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
andrewbonney	0:ec559500a63f	356	if (len >= vjlen) { \
andrewbonney	0:ec559500a63f	357	PUTCHAR(opt, ucp); \
andrewbonney	0:ec559500a63f	358	PUTCHAR(vjlen, ucp); \
andrewbonney	0:ec559500a63f	359	PUTSHORT(val, ucp); \
andrewbonney	0:ec559500a63f	360	if (!old) { \
andrewbonney	0:ec559500a63f	361	PUTCHAR(maxslotindex, ucp); \
andrewbonney	0:ec559500a63f	362	PUTCHAR(cflag, ucp); \
andrewbonney	0:ec559500a63f	363	} \
andrewbonney	0:ec559500a63f	364	len -= vjlen; \
andrewbonney	0:ec559500a63f	365	} else { \
andrewbonney	0:ec559500a63f	366	neg = 0; \
andrewbonney	0:ec559500a63f	367	} \
andrewbonney	0:ec559500a63f	368	}
andrewbonney	0:ec559500a63f	369
andrewbonney	0:ec559500a63f	370	#define ADDCIADDR(opt, neg, old, val1, val2) \
andrewbonney	0:ec559500a63f	371	if (neg) { \
andrewbonney	0:ec559500a63f	372	int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
andrewbonney	0:ec559500a63f	373	if (len >= addrlen) { \
andrewbonney	0:ec559500a63f	374	u32_t l; \
andrewbonney	0:ec559500a63f	375	PUTCHAR(opt, ucp); \
andrewbonney	0:ec559500a63f	376	PUTCHAR(addrlen, ucp); \
andrewbonney	0:ec559500a63f	377	l = ntohl(val1); \
andrewbonney	0:ec559500a63f	378	PUTLONG(l, ucp); \
andrewbonney	0:ec559500a63f	379	if (old) { \
andrewbonney	0:ec559500a63f	380	l = ntohl(val2); \
andrewbonney	0:ec559500a63f	381	PUTLONG(l, ucp); \
andrewbonney	0:ec559500a63f	382	} \
andrewbonney	0:ec559500a63f	383	len -= addrlen; \
andrewbonney	0:ec559500a63f	384	} else { \
andrewbonney	0:ec559500a63f	385	neg = 0; \
andrewbonney	0:ec559500a63f	386	} \
andrewbonney	0:ec559500a63f	387	}
andrewbonney	0:ec559500a63f	388
andrewbonney	0:ec559500a63f	389	#define ADDCIDNS(opt, neg, addr) \
andrewbonney	0:ec559500a63f	390	if (neg) { \
andrewbonney	0:ec559500a63f	391	if (len >= CILEN_ADDR) { \
andrewbonney	0:ec559500a63f	392	u32_t l; \
andrewbonney	0:ec559500a63f	393	PUTCHAR(opt, ucp); \
andrewbonney	0:ec559500a63f	394	PUTCHAR(CILEN_ADDR, ucp); \
andrewbonney	0:ec559500a63f	395	l = ntohl(addr); \
andrewbonney	0:ec559500a63f	396	PUTLONG(l, ucp); \
andrewbonney	0:ec559500a63f	397	len -= CILEN_ADDR; \
andrewbonney	0:ec559500a63f	398	} else { \
andrewbonney	0:ec559500a63f	399	neg = 0; \
andrewbonney	0:ec559500a63f	400	} \
andrewbonney	0:ec559500a63f	401	}
andrewbonney	0:ec559500a63f	402
andrewbonney	0:ec559500a63f	403	ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
andrewbonney	0:ec559500a63f	404	go->old_addrs, go->ouraddr, go->hisaddr);
andrewbonney	0:ec559500a63f	405
andrewbonney	0:ec559500a63f	406	ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
andrewbonney	0:ec559500a63f	407	go->maxslotindex, go->cflag);
andrewbonney	0:ec559500a63f	408
andrewbonney	0:ec559500a63f	409	ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
andrewbonney	0:ec559500a63f	410
andrewbonney	0:ec559500a63f	411	ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
andrewbonney	0:ec559500a63f	412
andrewbonney	0:ec559500a63f	413	*lenp -= len;
andrewbonney	0:ec559500a63f	414	}
andrewbonney	0:ec559500a63f	415
andrewbonney	0:ec559500a63f	416
andrewbonney	0:ec559500a63f	417	/*
andrewbonney	0:ec559500a63f	418	* ipcp_ackci - Ack our CIs.
andrewbonney	0:ec559500a63f	419	*
andrewbonney	0:ec559500a63f	420	* Returns:
andrewbonney	0:ec559500a63f	421	* 0 - Ack was bad.
andrewbonney	0:ec559500a63f	422	* 1 - Ack was good.
andrewbonney	0:ec559500a63f	423	*/
andrewbonney	0:ec559500a63f	424	static int
andrewbonney	0:ec559500a63f	425	ipcp_ackci(fsm f, u_char p, int len)
andrewbonney	0:ec559500a63f	426	{
andrewbonney	0:ec559500a63f	427	ipcp_options *go = &ipcp_gotoptions[f->unit];
andrewbonney	0:ec559500a63f	428	u_short cilen, citype, cishort;
andrewbonney	0:ec559500a63f	429	u32_t cilong;
andrewbonney	0:ec559500a63f	430	u_char cimaxslotindex, cicflag;
andrewbonney	0:ec559500a63f	431
andrewbonney	0:ec559500a63f	432	/*
andrewbonney	0:ec559500a63f	433	* CIs must be in exactly the same order that we sent...
andrewbonney	0:ec559500a63f	434	* Check packet length and CI length at each step.
andrewbonney	0:ec559500a63f	435	* If we find any deviations, then this packet is bad.
andrewbonney	0:ec559500a63f	436	*/
andrewbonney	0:ec559500a63f	437
andrewbonney	0:ec559500a63f	438	#define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
andrewbonney	0:ec559500a63f	439	if (neg) { \
andrewbonney	0:ec559500a63f	440	int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
andrewbonney	0:ec559500a63f	441	if ((len -= vjlen) < 0) { \
andrewbonney	0:ec559500a63f	442	goto bad; \
andrewbonney	0:ec559500a63f	443	} \
andrewbonney	0:ec559500a63f	444	GETCHAR(citype, p); \
andrewbonney	0:ec559500a63f	445	GETCHAR(cilen, p); \
andrewbonney	0:ec559500a63f	446	if (cilen != vjlen \|\| \
andrewbonney	0:ec559500a63f	447	citype != opt) { \
andrewbonney	0:ec559500a63f	448	goto bad; \
andrewbonney	0:ec559500a63f	449	} \
andrewbonney	0:ec559500a63f	450	GETSHORT(cishort, p); \
andrewbonney	0:ec559500a63f	451	if (cishort != val) { \
andrewbonney	0:ec559500a63f	452	goto bad; \
andrewbonney	0:ec559500a63f	453	} \
andrewbonney	0:ec559500a63f	454	if (!old) { \
andrewbonney	0:ec559500a63f	455	GETCHAR(cimaxslotindex, p); \
andrewbonney	0:ec559500a63f	456	if (cimaxslotindex != maxslotindex) { \
andrewbonney	0:ec559500a63f	457	goto bad; \
andrewbonney	0:ec559500a63f	458	} \
andrewbonney	0:ec559500a63f	459	GETCHAR(cicflag, p); \
andrewbonney	0:ec559500a63f	460	if (cicflag != cflag) { \
andrewbonney	0:ec559500a63f	461	goto bad; \
andrewbonney	0:ec559500a63f	462	} \
andrewbonney	0:ec559500a63f	463	} \
andrewbonney	0:ec559500a63f	464	}
andrewbonney	0:ec559500a63f	465
andrewbonney	0:ec559500a63f	466	#define ACKCIADDR(opt, neg, old, val1, val2) \
andrewbonney	0:ec559500a63f	467	if (neg) { \
andrewbonney	0:ec559500a63f	468	int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
andrewbonney	0:ec559500a63f	469	u32_t l; \
andrewbonney	0:ec559500a63f	470	if ((len -= addrlen) < 0) { \
andrewbonney	0:ec559500a63f	471	goto bad; \
andrewbonney	0:ec559500a63f	472	} \
andrewbonney	0:ec559500a63f	473	GETCHAR(citype, p); \
andrewbonney	0:ec559500a63f	474	GETCHAR(cilen, p); \
andrewbonney	0:ec559500a63f	475	if (cilen != addrlen \|\| \
andrewbonney	0:ec559500a63f	476	citype != opt) { \
andrewbonney	0:ec559500a63f	477	goto bad; \
andrewbonney	0:ec559500a63f	478	} \
andrewbonney	0:ec559500a63f	479	GETLONG(l, p); \
andrewbonney	0:ec559500a63f	480	cilong = htonl(l); \
andrewbonney	0:ec559500a63f	481	if (val1 != cilong) { \
andrewbonney	0:ec559500a63f	482	goto bad; \
andrewbonney	0:ec559500a63f	483	} \
andrewbonney	0:ec559500a63f	484	if (old) { \
andrewbonney	0:ec559500a63f	485	GETLONG(l, p); \
andrewbonney	0:ec559500a63f	486	cilong = htonl(l); \
andrewbonney	0:ec559500a63f	487	if (val2 != cilong) { \
andrewbonney	0:ec559500a63f	488	goto bad; \
andrewbonney	0:ec559500a63f	489	} \
andrewbonney	0:ec559500a63f	490	} \
andrewbonney	0:ec559500a63f	491	}
andrewbonney	0:ec559500a63f	492
andrewbonney	0:ec559500a63f	493	#define ACKCIDNS(opt, neg, addr) \
andrewbonney	0:ec559500a63f	494	if (neg) { \
andrewbonney	0:ec559500a63f	495	u32_t l; \
andrewbonney	0:ec559500a63f	496	if ((len -= CILEN_ADDR) < 0) { \
andrewbonney	0:ec559500a63f	497	goto bad; \
andrewbonney	0:ec559500a63f	498	} \
andrewbonney	0:ec559500a63f	499	GETCHAR(citype, p); \
andrewbonney	0:ec559500a63f	500	GETCHAR(cilen, p); \
andrewbonney	0:ec559500a63f	501	if (cilen != CILEN_ADDR \|\| \
andrewbonney	0:ec559500a63f	502	citype != opt) { \
andrewbonney	0:ec559500a63f	503	goto bad; \
andrewbonney	0:ec559500a63f	504	} \
andrewbonney	0:ec559500a63f	505	GETLONG(l, p); \
andrewbonney	0:ec559500a63f	506	cilong = htonl(l); \
andrewbonney	0:ec559500a63f	507	if (addr != cilong) { \
andrewbonney	0:ec559500a63f	508	goto bad; \
andrewbonney	0:ec559500a63f	509	} \
andrewbonney	0:ec559500a63f	510	}
andrewbonney	0:ec559500a63f	511
andrewbonney	0:ec559500a63f	512	ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
andrewbonney	0:ec559500a63f	513	go->old_addrs, go->ouraddr, go->hisaddr);
andrewbonney	0:ec559500a63f	514
andrewbonney	0:ec559500a63f	515	ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
andrewbonney	0:ec559500a63f	516	go->maxslotindex, go->cflag);
andrewbonney	0:ec559500a63f	517
andrewbonney	0:ec559500a63f	518	ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
andrewbonney	0:ec559500a63f	519
andrewbonney	0:ec559500a63f	520	ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
andrewbonney	0:ec559500a63f	521
andrewbonney	0:ec559500a63f	522	/*
andrewbonney	0:ec559500a63f	523	* If there are any remaining CIs, then this packet is bad.
andrewbonney	0:ec559500a63f	524	*/
andrewbonney	0:ec559500a63f	525	if (len != 0) {
andrewbonney	0:ec559500a63f	526	goto bad;
andrewbonney	0:ec559500a63f	527	}
andrewbonney	0:ec559500a63f	528	return (1);
andrewbonney	0:ec559500a63f	529
andrewbonney	0:ec559500a63f	530	bad:
andrewbonney	0:ec559500a63f	531	IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
andrewbonney	0:ec559500a63f	532	return (0);
andrewbonney	0:ec559500a63f	533	}
andrewbonney	0:ec559500a63f	534
andrewbonney	0:ec559500a63f	535	/*
andrewbonney	0:ec559500a63f	536	* ipcp_nakci - Peer has sent a NAK for some of our CIs.
andrewbonney	0:ec559500a63f	537	* This should not modify any state if the Nak is bad
andrewbonney	0:ec559500a63f	538	* or if IPCP is in the LS_OPENED state.
andrewbonney	0:ec559500a63f	539	*
andrewbonney	0:ec559500a63f	540	* Returns:
andrewbonney	0:ec559500a63f	541	* 0 - Nak was bad.
andrewbonney	0:ec559500a63f	542	* 1 - Nak was good.
andrewbonney	0:ec559500a63f	543	*/
andrewbonney	0:ec559500a63f	544	static int
andrewbonney	0:ec559500a63f	545	ipcp_nakci(fsm f, u_char p, int len)
andrewbonney	0:ec559500a63f	546	{
andrewbonney	0:ec559500a63f	547	ipcp_options *go = &ipcp_gotoptions[f->unit];
andrewbonney	0:ec559500a63f	548	u_char cimaxslotindex, cicflag;
andrewbonney	0:ec559500a63f	549	u_char citype, cilen, *next;
andrewbonney	0:ec559500a63f	550	u_short cishort;
andrewbonney	0:ec559500a63f	551	u32_t ciaddr1, ciaddr2, l, cidnsaddr;
andrewbonney	0:ec559500a63f	552	ipcp_options no; /* options we've seen Naks for */
andrewbonney	0:ec559500a63f	553	ipcp_options try; /* options to request next time */
andrewbonney	0:ec559500a63f	554
andrewbonney	0:ec559500a63f	555	BZERO(&no, sizeof(no));
andrewbonney	0:ec559500a63f	556	try = *go;
andrewbonney	0:ec559500a63f	557
andrewbonney	0:ec559500a63f	558	/*
andrewbonney	0:ec559500a63f	559	* Any Nak'd CIs must be in exactly the same order that we sent.
andrewbonney	0:ec559500a63f	560	* Check packet length and CI length at each step.
andrewbonney	0:ec559500a63f	561	* If we find any deviations, then this packet is bad.
andrewbonney	0:ec559500a63f	562	*/
andrewbonney	0:ec559500a63f	563	#define NAKCIADDR(opt, neg, old, code) \
andrewbonney	0:ec559500a63f	564	if (go->neg && \
andrewbonney	0:ec559500a63f	565	len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
andrewbonney	0:ec559500a63f	566	p[1] == cilen && \
andrewbonney	0:ec559500a63f	567	p[0] == opt) { \
andrewbonney	0:ec559500a63f	568	len -= cilen; \
andrewbonney	0:ec559500a63f	569	INCPTR(2, p); \
andrewbonney	0:ec559500a63f	570	GETLONG(l, p); \
andrewbonney	0:ec559500a63f	571	ciaddr1 = htonl(l); \
andrewbonney	0:ec559500a63f	572	if (old) { \
andrewbonney	0:ec559500a63f	573	GETLONG(l, p); \
andrewbonney	0:ec559500a63f	574	ciaddr2 = htonl(l); \
andrewbonney	0:ec559500a63f	575	no.old_addrs = 1; \
andrewbonney	0:ec559500a63f	576	} else { \
andrewbonney	0:ec559500a63f	577	ciaddr2 = 0; \
andrewbonney	0:ec559500a63f	578	} \
andrewbonney	0:ec559500a63f	579	no.neg = 1; \
andrewbonney	0:ec559500a63f	580	code \
andrewbonney	0:ec559500a63f	581	}
andrewbonney	0:ec559500a63f	582
andrewbonney	0:ec559500a63f	583	#define NAKCIVJ(opt, neg, code) \
andrewbonney	0:ec559500a63f	584	if (go->neg && \
andrewbonney	0:ec559500a63f	585	((cilen = p[1]) == CILEN_COMPRESS \|\| cilen == CILEN_VJ) && \
andrewbonney	0:ec559500a63f	586	len >= cilen && \
andrewbonney	0:ec559500a63f	587	p[0] == opt) { \
andrewbonney	0:ec559500a63f	588	len -= cilen; \
andrewbonney	0:ec559500a63f	589	INCPTR(2, p); \
andrewbonney	0:ec559500a63f	590	GETSHORT(cishort, p); \
andrewbonney	0:ec559500a63f	591	no.neg = 1; \
andrewbonney	0:ec559500a63f	592	code \
andrewbonney	0:ec559500a63f	593	}
andrewbonney	0:ec559500a63f	594
andrewbonney	0:ec559500a63f	595	#define NAKCIDNS(opt, neg, code) \
andrewbonney	0:ec559500a63f	596	if (go->neg && \
andrewbonney	0:ec559500a63f	597	((cilen = p[1]) == CILEN_ADDR) && \
andrewbonney	0:ec559500a63f	598	len >= cilen && \
andrewbonney	0:ec559500a63f	599	p[0] == opt) { \
andrewbonney	0:ec559500a63f	600	len -= cilen; \
andrewbonney	0:ec559500a63f	601	INCPTR(2, p); \
andrewbonney	0:ec559500a63f	602	GETLONG(l, p); \
andrewbonney	0:ec559500a63f	603	cidnsaddr = htonl(l); \
andrewbonney	0:ec559500a63f	604	no.neg = 1; \
andrewbonney	0:ec559500a63f	605	code \
andrewbonney	0:ec559500a63f	606	}
andrewbonney	0:ec559500a63f	607
andrewbonney	0:ec559500a63f	608	/*
andrewbonney	0:ec559500a63f	609	* Accept the peer's idea of {our,his} address, if different
andrewbonney	0:ec559500a63f	610	* from our idea, only if the accept_{local,remote} flag is set.
andrewbonney	0:ec559500a63f	611	*/
andrewbonney	0:ec559500a63f	612	NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
andrewbonney	0:ec559500a63f	613	if (go->accept_local && ciaddr1) { /* Do we know our address? */
andrewbonney	0:ec559500a63f	614	try.ouraddr = ciaddr1;
andrewbonney	0:ec559500a63f	615	IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
andrewbonney	0:ec559500a63f	616	inet_ntoa(ciaddr1)));
andrewbonney	0:ec559500a63f	617	}
andrewbonney	0:ec559500a63f	618	if (go->accept_remote && ciaddr2) { /* Does he know his? */
andrewbonney	0:ec559500a63f	619	try.hisaddr = ciaddr2;
andrewbonney	0:ec559500a63f	620	IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
andrewbonney	0:ec559500a63f	621	inet_ntoa(ciaddr2)));
andrewbonney	0:ec559500a63f	622	}
andrewbonney	0:ec559500a63f	623	);
andrewbonney	0:ec559500a63f	624
andrewbonney	0:ec559500a63f	625	/*
andrewbonney	0:ec559500a63f	626	* Accept the peer's value of maxslotindex provided that it
andrewbonney	0:ec559500a63f	627	* is less than what we asked for. Turn off slot-ID compression
andrewbonney	0:ec559500a63f	628	* if the peer wants. Send old-style compress-type option if
andrewbonney	0:ec559500a63f	629	* the peer wants.
andrewbonney	0:ec559500a63f	630	*/
andrewbonney	0:ec559500a63f	631	NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
andrewbonney	0:ec559500a63f	632	if (cilen == CILEN_VJ) {
andrewbonney	0:ec559500a63f	633	GETCHAR(cimaxslotindex, p);
andrewbonney	0:ec559500a63f	634	GETCHAR(cicflag, p);
andrewbonney	0:ec559500a63f	635	if (cishort == IPCP_VJ_COMP) {
andrewbonney	0:ec559500a63f	636	try.old_vj = 0;
andrewbonney	0:ec559500a63f	637	if (cimaxslotindex < go->maxslotindex) {
andrewbonney	0:ec559500a63f	638	try.maxslotindex = cimaxslotindex;
andrewbonney	0:ec559500a63f	639	}
andrewbonney	0:ec559500a63f	640	if (!cicflag) {
andrewbonney	0:ec559500a63f	641	try.cflag = 0;
andrewbonney	0:ec559500a63f	642	}
andrewbonney	0:ec559500a63f	643	} else {
andrewbonney	0:ec559500a63f	644	try.neg_vj = 0;
andrewbonney	0:ec559500a63f	645	}
andrewbonney	0:ec559500a63f	646	} else {
andrewbonney	0:ec559500a63f	647	if (cishort == IPCP_VJ_COMP \|\| cishort == IPCP_VJ_COMP_OLD) {
andrewbonney	0:ec559500a63f	648	try.old_vj = 1;
andrewbonney	0:ec559500a63f	649	try.vj_protocol = cishort;
andrewbonney	0:ec559500a63f	650	} else {
andrewbonney	0:ec559500a63f	651	try.neg_vj = 0;
andrewbonney	0:ec559500a63f	652	}
andrewbonney	0:ec559500a63f	653	}
andrewbonney	0:ec559500a63f	654	);
andrewbonney	0:ec559500a63f	655
andrewbonney	0:ec559500a63f	656	NAKCIDNS(CI_MS_DNS1, req_dns1,
andrewbonney	0:ec559500a63f	657	try.dnsaddr[0] = cidnsaddr;
andrewbonney	0:ec559500a63f	658	IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
andrewbonney	0:ec559500a63f	659	);
andrewbonney	0:ec559500a63f	660
andrewbonney	0:ec559500a63f	661	NAKCIDNS(CI_MS_DNS2, req_dns2,
andrewbonney	0:ec559500a63f	662	try.dnsaddr[1] = cidnsaddr;
andrewbonney	0:ec559500a63f	663	IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
andrewbonney	0:ec559500a63f	664	);
andrewbonney	0:ec559500a63f	665
andrewbonney	0:ec559500a63f	666	/*
andrewbonney	0:ec559500a63f	667	* There may be remaining CIs, if the peer is requesting negotiation
andrewbonney	0:ec559500a63f	668	* on an option that we didn't include in our request packet.
andrewbonney	0:ec559500a63f	669	* If they want to negotiate about IP addresses, we comply.
andrewbonney	0:ec559500a63f	670	* If they want us to ask for compression, we refuse.
andrewbonney	0:ec559500a63f	671	*/
andrewbonney	0:ec559500a63f	672	while (len > CILEN_VOID) {
andrewbonney	0:ec559500a63f	673	GETCHAR(citype, p);
andrewbonney	0:ec559500a63f	674	GETCHAR(cilen, p);
andrewbonney	0:ec559500a63f	675	if( (len -= cilen) < 0 ) {
andrewbonney	0:ec559500a63f	676	goto bad;
andrewbonney	0:ec559500a63f	677	}
andrewbonney	0:ec559500a63f	678	next = p + cilen - 2;
andrewbonney	0:ec559500a63f	679
andrewbonney	0:ec559500a63f	680	switch (citype) {
andrewbonney	0:ec559500a63f	681	case CI_COMPRESSTYPE:
andrewbonney	0:ec559500a63f	682	if (go->neg_vj \|\| no.neg_vj \|\|
andrewbonney	0:ec559500a63f	683	(cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
andrewbonney	0:ec559500a63f	684	goto bad;
andrewbonney	0:ec559500a63f	685	}
andrewbonney	0:ec559500a63f	686	no.neg_vj = 1;
andrewbonney	0:ec559500a63f	687	break;
andrewbonney	0:ec559500a63f	688	case CI_ADDRS:
andrewbonney	0:ec559500a63f	689	if ((go->neg_addr && go->old_addrs) \|\| no.old_addrs
andrewbonney	0:ec559500a63f	690	\|\| cilen != CILEN_ADDRS) {
andrewbonney	0:ec559500a63f	691	goto bad;
andrewbonney	0:ec559500a63f	692	}
andrewbonney	0:ec559500a63f	693	try.neg_addr = 1;
andrewbonney	0:ec559500a63f	694	try.old_addrs = 1;
andrewbonney	0:ec559500a63f	695	GETLONG(l, p);
andrewbonney	0:ec559500a63f	696	ciaddr1 = htonl(l);
andrewbonney	0:ec559500a63f	697	if (ciaddr1 && go->accept_local) {
andrewbonney	0:ec559500a63f	698	try.ouraddr = ciaddr1;
andrewbonney	0:ec559500a63f	699	}
andrewbonney	0:ec559500a63f	700	GETLONG(l, p);
andrewbonney	0:ec559500a63f	701	ciaddr2 = htonl(l);
andrewbonney	0:ec559500a63f	702	if (ciaddr2 && go->accept_remote) {
andrewbonney	0:ec559500a63f	703	try.hisaddr = ciaddr2;
andrewbonney	0:ec559500a63f	704	}
andrewbonney	0:ec559500a63f	705	no.old_addrs = 1;
andrewbonney	0:ec559500a63f	706	break;
andrewbonney	0:ec559500a63f	707	case CI_ADDR:
andrewbonney	0:ec559500a63f	708	if (go->neg_addr \|\| no.neg_addr \|\| cilen != CILEN_ADDR) {
andrewbonney	0:ec559500a63f	709	goto bad;
andrewbonney	0:ec559500a63f	710	}
andrewbonney	0:ec559500a63f	711	try.old_addrs = 0;
andrewbonney	0:ec559500a63f	712	GETLONG(l, p);
andrewbonney	0:ec559500a63f	713	ciaddr1 = htonl(l);
andrewbonney	0:ec559500a63f	714	if (ciaddr1 && go->accept_local) {
andrewbonney	0:ec559500a63f	715	try.ouraddr = ciaddr1;
andrewbonney	0:ec559500a63f	716	}
andrewbonney	0:ec559500a63f	717	if (try.ouraddr != 0) {
andrewbonney	0:ec559500a63f	718	try.neg_addr = 1;
andrewbonney	0:ec559500a63f	719	}
andrewbonney	0:ec559500a63f	720	no.neg_addr = 1;
andrewbonney	0:ec559500a63f	721	break;
andrewbonney	0:ec559500a63f	722	}
andrewbonney	0:ec559500a63f	723	p = next;
andrewbonney	0:ec559500a63f	724	}
andrewbonney	0:ec559500a63f	725
andrewbonney	0:ec559500a63f	726	/* If there is still anything left, this packet is bad. */
andrewbonney	0:ec559500a63f	727	if (len != 0) {
andrewbonney	0:ec559500a63f	728	goto bad;
andrewbonney	0:ec559500a63f	729	}
andrewbonney	0:ec559500a63f	730
andrewbonney	0:ec559500a63f	731	/*
andrewbonney	0:ec559500a63f	732	* OK, the Nak is good. Now we can update state.
andrewbonney	0:ec559500a63f	733	*/
andrewbonney	0:ec559500a63f	734	if (f->state != LS_OPENED) {
andrewbonney	0:ec559500a63f	735	*go = try;
andrewbonney	0:ec559500a63f	736	}
andrewbonney	0:ec559500a63f	737
andrewbonney	0:ec559500a63f	738	return 1;
andrewbonney	0:ec559500a63f	739
andrewbonney	0:ec559500a63f	740	bad:
andrewbonney	0:ec559500a63f	741	IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
andrewbonney	0:ec559500a63f	742	return 0;
andrewbonney	0:ec559500a63f	743	}
andrewbonney	0:ec559500a63f	744
andrewbonney	0:ec559500a63f	745
andrewbonney	0:ec559500a63f	746	/*
andrewbonney	0:ec559500a63f	747	* ipcp_rejci - Reject some of our CIs.
andrewbonney	0:ec559500a63f	748	*/
andrewbonney	0:ec559500a63f	749	static int
andrewbonney	0:ec559500a63f	750	ipcp_rejci(fsm f, u_char p, int len)
andrewbonney	0:ec559500a63f	751	{
andrewbonney	0:ec559500a63f	752	ipcp_options *go = &ipcp_gotoptions[f->unit];
andrewbonney	0:ec559500a63f	753	u_char cimaxslotindex, ciflag, cilen;
andrewbonney	0:ec559500a63f	754	u_short cishort;
andrewbonney	0:ec559500a63f	755	u32_t cilong;
andrewbonney	0:ec559500a63f	756	ipcp_options try; /* options to request next time */
andrewbonney	0:ec559500a63f	757
andrewbonney	0:ec559500a63f	758	try = *go;
andrewbonney	0:ec559500a63f	759	/*
andrewbonney	0:ec559500a63f	760	* Any Rejected CIs must be in exactly the same order that we sent.
andrewbonney	0:ec559500a63f	761	* Check packet length and CI length at each step.
andrewbonney	0:ec559500a63f	762	* If we find any deviations, then this packet is bad.
andrewbonney	0:ec559500a63f	763	*/
andrewbonney	0:ec559500a63f	764	#define REJCIADDR(opt, neg, old, val1, val2) \
andrewbonney	0:ec559500a63f	765	if (go->neg && \
andrewbonney	0:ec559500a63f	766	len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
andrewbonney	0:ec559500a63f	767	p[1] == cilen && \
andrewbonney	0:ec559500a63f	768	p[0] == opt) { \
andrewbonney	0:ec559500a63f	769	u32_t l; \
andrewbonney	0:ec559500a63f	770	len -= cilen; \
andrewbonney	0:ec559500a63f	771	INCPTR(2, p); \
andrewbonney	0:ec559500a63f	772	GETLONG(l, p); \
andrewbonney	0:ec559500a63f	773	cilong = htonl(l); \
andrewbonney	0:ec559500a63f	774	/* Check rejected value. */ \
andrewbonney	0:ec559500a63f	775	if (cilong != val1) { \
andrewbonney	0:ec559500a63f	776	goto bad; \
andrewbonney	0:ec559500a63f	777	} \
andrewbonney	0:ec559500a63f	778	if (old) { \
andrewbonney	0:ec559500a63f	779	GETLONG(l, p); \
andrewbonney	0:ec559500a63f	780	cilong = htonl(l); \
andrewbonney	0:ec559500a63f	781	/* Check rejected value. */ \
andrewbonney	0:ec559500a63f	782	if (cilong != val2) { \
andrewbonney	0:ec559500a63f	783	goto bad; \
andrewbonney	0:ec559500a63f	784	} \
andrewbonney	0:ec559500a63f	785	} \
andrewbonney	0:ec559500a63f	786	try.neg = 0; \
andrewbonney	0:ec559500a63f	787	}
andrewbonney	0:ec559500a63f	788
andrewbonney	0:ec559500a63f	789	#define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
andrewbonney	0:ec559500a63f	790	if (go->neg && \
andrewbonney	0:ec559500a63f	791	p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
andrewbonney	0:ec559500a63f	792	len >= p[1] && \
andrewbonney	0:ec559500a63f	793	p[0] == opt) { \
andrewbonney	0:ec559500a63f	794	len -= p[1]; \
andrewbonney	0:ec559500a63f	795	INCPTR(2, p); \
andrewbonney	0:ec559500a63f	796	GETSHORT(cishort, p); \
andrewbonney	0:ec559500a63f	797	/* Check rejected value. */ \
andrewbonney	0:ec559500a63f	798	if (cishort != val) { \
andrewbonney	0:ec559500a63f	799	goto bad; \
andrewbonney	0:ec559500a63f	800	} \
andrewbonney	0:ec559500a63f	801	if (!old) { \
andrewbonney	0:ec559500a63f	802	GETCHAR(cimaxslotindex, p); \
andrewbonney	0:ec559500a63f	803	if (cimaxslotindex != maxslot) { \
andrewbonney	0:ec559500a63f	804	goto bad; \
andrewbonney	0:ec559500a63f	805	} \
andrewbonney	0:ec559500a63f	806	GETCHAR(ciflag, p); \
andrewbonney	0:ec559500a63f	807	if (ciflag != cflag) { \
andrewbonney	0:ec559500a63f	808	goto bad; \
andrewbonney	0:ec559500a63f	809	} \
andrewbonney	0:ec559500a63f	810	} \
andrewbonney	0:ec559500a63f	811	try.neg = 0; \
andrewbonney	0:ec559500a63f	812	}
andrewbonney	0:ec559500a63f	813
andrewbonney	0:ec559500a63f	814	#define REJCIDNS(opt, neg, dnsaddr) \
andrewbonney	0:ec559500a63f	815	if (go->neg && \
andrewbonney	0:ec559500a63f	816	((cilen = p[1]) == CILEN_ADDR) && \
andrewbonney	0:ec559500a63f	817	len >= cilen && \
andrewbonney	0:ec559500a63f	818	p[0] == opt) { \
andrewbonney	0:ec559500a63f	819	u32_t l; \
andrewbonney	0:ec559500a63f	820	len -= cilen; \
andrewbonney	0:ec559500a63f	821	INCPTR(2, p); \
andrewbonney	0:ec559500a63f	822	GETLONG(l, p); \
andrewbonney	0:ec559500a63f	823	cilong = htonl(l); \
andrewbonney	0:ec559500a63f	824	/* Check rejected value. */ \
andrewbonney	0:ec559500a63f	825	if (cilong != dnsaddr) { \
andrewbonney	0:ec559500a63f	826	goto bad; \
andrewbonney	0:ec559500a63f	827	} \
andrewbonney	0:ec559500a63f	828	try.neg = 0; \
andrewbonney	0:ec559500a63f	829	}
andrewbonney	0:ec559500a63f	830
andrewbonney	0:ec559500a63f	831	REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
andrewbonney	0:ec559500a63f	832	go->old_addrs, go->ouraddr, go->hisaddr);
andrewbonney	0:ec559500a63f	833
andrewbonney	0:ec559500a63f	834	REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
andrewbonney	0:ec559500a63f	835	go->maxslotindex, go->cflag);
andrewbonney	0:ec559500a63f	836
andrewbonney	0:ec559500a63f	837	REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
andrewbonney	0:ec559500a63f	838
andrewbonney	0:ec559500a63f	839	REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
andrewbonney	0:ec559500a63f	840
andrewbonney	0:ec559500a63f	841	/*
andrewbonney	0:ec559500a63f	842	* If there are any remaining CIs, then this packet is bad.
andrewbonney	0:ec559500a63f	843	*/
andrewbonney	0:ec559500a63f	844	if (len != 0) {
andrewbonney	0:ec559500a63f	845	goto bad;
andrewbonney	0:ec559500a63f	846	}
andrewbonney	0:ec559500a63f	847	/*
andrewbonney	0:ec559500a63f	848	* Now we can update state.
andrewbonney	0:ec559500a63f	849	*/
andrewbonney	0:ec559500a63f	850	if (f->state != LS_OPENED) {
andrewbonney	0:ec559500a63f	851	*go = try;
andrewbonney	0:ec559500a63f	852	}
andrewbonney	0:ec559500a63f	853	return 1;
andrewbonney	0:ec559500a63f	854
andrewbonney	0:ec559500a63f	855	bad:
andrewbonney	0:ec559500a63f	856	IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
andrewbonney	0:ec559500a63f	857	return 0;
andrewbonney	0:ec559500a63f	858	}
andrewbonney	0:ec559500a63f	859
andrewbonney	0:ec559500a63f	860
andrewbonney	0:ec559500a63f	861	/*
andrewbonney	0:ec559500a63f	862	* ipcp_reqci - Check the peer's requested CIs and send appropriate response.
andrewbonney	0:ec559500a63f	863	*
andrewbonney	0:ec559500a63f	864	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
andrewbonney	0:ec559500a63f	865	* appropriately. If reject_if_disagree is non-zero, doesn't return
andrewbonney	0:ec559500a63f	866	* CONFNAK; returns CONFREJ if it can't return CONFACK.
andrewbonney	0:ec559500a63f	867	*/
andrewbonney	0:ec559500a63f	868	static int
andrewbonney	0:ec559500a63f	869	ipcp_reqci(fsm f, u_char inp/* Requested CIs /,int len/* Length of requested CIs */,int reject_if_disagree)
andrewbonney	0:ec559500a63f	870	{
andrewbonney	0:ec559500a63f	871	ipcp_options *wo = &ipcp_wantoptions[f->unit];
andrewbonney	0:ec559500a63f	872	ipcp_options *ho = &ipcp_hisoptions[f->unit];
andrewbonney	0:ec559500a63f	873	ipcp_options *ao = &ipcp_allowoptions[f->unit];
andrewbonney	0:ec559500a63f	874	#ifdef OLD_CI_ADDRS
andrewbonney	0:ec559500a63f	875	ipcp_options *go = &ipcp_gotoptions[f->unit];
andrewbonney	0:ec559500a63f	876	#endif
andrewbonney	0:ec559500a63f	877	u_char cip, next; /* Pointer to current and next CIs */
andrewbonney	0:ec559500a63f	878	u_short cilen, citype; /* Parsed len, type */
andrewbonney	0:ec559500a63f	879	u_short cishort; /* Parsed short value */
andrewbonney	0:ec559500a63f	880	u32_t tl, ciaddr1; /* Parsed address values */
andrewbonney	0:ec559500a63f	881	#ifdef OLD_CI_ADDRS
andrewbonney	0:ec559500a63f	882	u32_t ciaddr2; /* Parsed address values */
andrewbonney	0:ec559500a63f	883	#endif
andrewbonney	0:ec559500a63f	884	int rc = CONFACK; /* Final packet return code */
andrewbonney	0:ec559500a63f	885	int orc; /* Individual option return code */
andrewbonney	0:ec559500a63f	886	u_char p; / Pointer to next char to parse */
andrewbonney	0:ec559500a63f	887	u_char ucp = inp; / Pointer to current output char */
andrewbonney	0:ec559500a63f	888	int l = len; / Length left */
andrewbonney	0:ec559500a63f	889	u_char maxslotindex, cflag;
andrewbonney	0:ec559500a63f	890	int d;
andrewbonney	0:ec559500a63f	891
andrewbonney	0:ec559500a63f	892	cis_received[f->unit] = 1;
andrewbonney	0:ec559500a63f	893
andrewbonney	0:ec559500a63f	894	/*
andrewbonney	0:ec559500a63f	895	* Reset all his options.
andrewbonney	0:ec559500a63f	896	*/
andrewbonney	0:ec559500a63f	897	BZERO(ho, sizeof(*ho));
andrewbonney	0:ec559500a63f	898
andrewbonney	0:ec559500a63f	899	/*
andrewbonney	0:ec559500a63f	900	* Process all his options.
andrewbonney	0:ec559500a63f	901	*/
andrewbonney	0:ec559500a63f	902	next = inp;
andrewbonney	0:ec559500a63f	903	while (l) {
andrewbonney	0:ec559500a63f	904	orc = CONFACK; /* Assume success */
andrewbonney	0:ec559500a63f	905	cip = p = next; /* Remember begining of CI */
andrewbonney	0:ec559500a63f	906	if (l < 2 \|\| /* Not enough data for CI header or */
andrewbonney	0:ec559500a63f	907	p[1] < 2 \|\| /* CI length too small or */
andrewbonney	0:ec559500a63f	908	p[1] > l) { /* CI length too big? */
andrewbonney	0:ec559500a63f	909	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
andrewbonney	0:ec559500a63f	910	orc = CONFREJ; /* Reject bad CI */
andrewbonney	0:ec559500a63f	911	cilen = (u_short)l;/* Reject till end of packet */
andrewbonney	0:ec559500a63f	912	l = 0; /* Don't loop again */
andrewbonney	0:ec559500a63f	913	goto endswitch;
andrewbonney	0:ec559500a63f	914	}
andrewbonney	0:ec559500a63f	915	GETCHAR(citype, p); /* Parse CI type */
andrewbonney	0:ec559500a63f	916	GETCHAR(cilen, p); /* Parse CI length */
andrewbonney	0:ec559500a63f	917	l -= cilen; /* Adjust remaining length */
andrewbonney	0:ec559500a63f	918	next += cilen; /* Step to next CI */
andrewbonney	0:ec559500a63f	919
andrewbonney	0:ec559500a63f	920	switch (citype) { /* Check CI type */
andrewbonney	0:ec559500a63f	921	#ifdef OLD_CI_ADDRS /* Need to save space... */
andrewbonney	0:ec559500a63f	922	case CI_ADDRS:
andrewbonney	0:ec559500a63f	923	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
andrewbonney	0:ec559500a63f	924	if (!ao->neg_addr \|\|
andrewbonney	0:ec559500a63f	925	cilen != CILEN_ADDRS) { /* Check CI length */
andrewbonney	0:ec559500a63f	926	orc = CONFREJ; /* Reject CI */
andrewbonney	0:ec559500a63f	927	break;
andrewbonney	0:ec559500a63f	928	}
andrewbonney	0:ec559500a63f	929
andrewbonney	0:ec559500a63f	930	/*
andrewbonney	0:ec559500a63f	931	* If he has no address, or if we both have his address but
andrewbonney	0:ec559500a63f	932	* disagree about it, then NAK it with our idea.
andrewbonney	0:ec559500a63f	933	* In particular, if we don't know his address, but he does,
andrewbonney	0:ec559500a63f	934	* then accept it.
andrewbonney	0:ec559500a63f	935	*/
andrewbonney	0:ec559500a63f	936	GETLONG(tl, p); /* Parse source address (his) */
andrewbonney	0:ec559500a63f	937	ciaddr1 = htonl(tl);
andrewbonney	0:ec559500a63f	938	IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
andrewbonney	0:ec559500a63f	939	if (ciaddr1 != wo->hisaddr
andrewbonney	0:ec559500a63f	940	&& (ciaddr1 == 0 \|\| !wo->accept_remote)) {
andrewbonney	0:ec559500a63f	941	orc = CONFNAK;
andrewbonney	0:ec559500a63f	942	if (!reject_if_disagree) {
andrewbonney	0:ec559500a63f	943	DECPTR(sizeof(u32_t), p);
andrewbonney	0:ec559500a63f	944	tl = ntohl(wo->hisaddr);
andrewbonney	0:ec559500a63f	945	PUTLONG(tl, p);
andrewbonney	0:ec559500a63f	946	}
andrewbonney	0:ec559500a63f	947	} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
andrewbonney	0:ec559500a63f	948	/*
andrewbonney	0:ec559500a63f	949	* If neither we nor he knows his address, reject the option.
andrewbonney	0:ec559500a63f	950	*/
andrewbonney	0:ec559500a63f	951	orc = CONFREJ;
andrewbonney	0:ec559500a63f	952	wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
andrewbonney	0:ec559500a63f	953	break;
andrewbonney	0:ec559500a63f	954	}
andrewbonney	0:ec559500a63f	955
andrewbonney	0:ec559500a63f	956	/*
andrewbonney	0:ec559500a63f	957	* If he doesn't know our address, or if we both have our address
andrewbonney	0:ec559500a63f	958	* but disagree about it, then NAK it with our idea.
andrewbonney	0:ec559500a63f	959	*/
andrewbonney	0:ec559500a63f	960	GETLONG(tl, p); /* Parse desination address (ours) */
andrewbonney	0:ec559500a63f	961	ciaddr2 = htonl(tl);
andrewbonney	0:ec559500a63f	962	IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
andrewbonney	0:ec559500a63f	963	if (ciaddr2 != wo->ouraddr) {
andrewbonney	0:ec559500a63f	964	if (ciaddr2 == 0 \|\| !wo->accept_local) {
andrewbonney	0:ec559500a63f	965	orc = CONFNAK;
andrewbonney	0:ec559500a63f	966	if (!reject_if_disagree) {
andrewbonney	0:ec559500a63f	967	DECPTR(sizeof(u32_t), p);
andrewbonney	0:ec559500a63f	968	tl = ntohl(wo->ouraddr);
andrewbonney	0:ec559500a63f	969	PUTLONG(tl, p);
andrewbonney	0:ec559500a63f	970	}
andrewbonney	0:ec559500a63f	971	} else {
andrewbonney	0:ec559500a63f	972	go->ouraddr = ciaddr2; /* accept peer's idea */
andrewbonney	0:ec559500a63f	973	}
andrewbonney	0:ec559500a63f	974	}
andrewbonney	0:ec559500a63f	975
andrewbonney	0:ec559500a63f	976	ho->neg_addr = 1;
andrewbonney	0:ec559500a63f	977	ho->old_addrs = 1;
andrewbonney	0:ec559500a63f	978	ho->hisaddr = ciaddr1;
andrewbonney	0:ec559500a63f	979	ho->ouraddr = ciaddr2;
andrewbonney	0:ec559500a63f	980	break;
andrewbonney	0:ec559500a63f	981	#endif
andrewbonney	0:ec559500a63f	982
andrewbonney	0:ec559500a63f	983	case CI_ADDR:
andrewbonney	0:ec559500a63f	984	if (!ao->neg_addr) {
andrewbonney	0:ec559500a63f	985	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
andrewbonney	0:ec559500a63f	986	orc = CONFREJ; /* Reject CI */
andrewbonney	0:ec559500a63f	987	break;
andrewbonney	0:ec559500a63f	988	} else if (cilen != CILEN_ADDR) { /* Check CI length */
andrewbonney	0:ec559500a63f	989	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
andrewbonney	0:ec559500a63f	990	orc = CONFREJ; /* Reject CI */
andrewbonney	0:ec559500a63f	991	break;
andrewbonney	0:ec559500a63f	992	}
andrewbonney	0:ec559500a63f	993
andrewbonney	0:ec559500a63f	994	/*
andrewbonney	0:ec559500a63f	995	* If he has no address, or if we both have his address but
andrewbonney	0:ec559500a63f	996	* disagree about it, then NAK it with our idea.
andrewbonney	0:ec559500a63f	997	* In particular, if we don't know his address, but he does,
andrewbonney	0:ec559500a63f	998	* then accept it.
andrewbonney	0:ec559500a63f	999	*/
andrewbonney	0:ec559500a63f	1000	GETLONG(tl, p); /* Parse source address (his) */
andrewbonney	0:ec559500a63f	1001	ciaddr1 = htonl(tl);
andrewbonney	0:ec559500a63f	1002	if (ciaddr1 != wo->hisaddr
andrewbonney	0:ec559500a63f	1003	&& (ciaddr1 == 0 \|\| !wo->accept_remote)) {
andrewbonney	0:ec559500a63f	1004	orc = CONFNAK;
andrewbonney	0:ec559500a63f	1005	if (!reject_if_disagree) {
andrewbonney	0:ec559500a63f	1006	DECPTR(sizeof(u32_t), p);
andrewbonney	0:ec559500a63f	1007	tl = ntohl(wo->hisaddr);
andrewbonney	0:ec559500a63f	1008	PUTLONG(tl, p);
andrewbonney	0:ec559500a63f	1009	}
andrewbonney	0:ec559500a63f	1010	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
andrewbonney	0:ec559500a63f	1011	} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
andrewbonney	0:ec559500a63f	1012	/*
andrewbonney	0:ec559500a63f	1013	* Don't ACK an address of 0.0.0.0 - reject it instead.
andrewbonney	0:ec559500a63f	1014	*/
andrewbonney	0:ec559500a63f	1015	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
andrewbonney	0:ec559500a63f	1016	orc = CONFREJ;
andrewbonney	0:ec559500a63f	1017	wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
andrewbonney	0:ec559500a63f	1018	break;
andrewbonney	0:ec559500a63f	1019	}
andrewbonney	0:ec559500a63f	1020
andrewbonney	0:ec559500a63f	1021	ho->neg_addr = 1;
andrewbonney	0:ec559500a63f	1022	ho->hisaddr = ciaddr1;
andrewbonney	0:ec559500a63f	1023	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
andrewbonney	0:ec559500a63f	1024	break;
andrewbonney	0:ec559500a63f	1025
andrewbonney	0:ec559500a63f	1026	case CI_MS_DNS1:
andrewbonney	0:ec559500a63f	1027	case CI_MS_DNS2:
andrewbonney	0:ec559500a63f	1028	/* Microsoft primary or secondary DNS request */
andrewbonney	0:ec559500a63f	1029	d = citype == CI_MS_DNS2;
andrewbonney	0:ec559500a63f	1030
andrewbonney	0:ec559500a63f	1031	/* If we do not have a DNS address then we cannot send it */
andrewbonney	0:ec559500a63f	1032	if (ao->dnsaddr[d] == 0 \|\|
andrewbonney	0:ec559500a63f	1033	cilen != CILEN_ADDR) { /* Check CI length */
andrewbonney	0:ec559500a63f	1034	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
andrewbonney	0:ec559500a63f	1035	orc = CONFREJ; /* Reject CI */
andrewbonney	0:ec559500a63f	1036	break;
andrewbonney	0:ec559500a63f	1037	}
andrewbonney	0:ec559500a63f	1038	GETLONG(tl, p);
andrewbonney	0:ec559500a63f	1039	if (htonl(tl) != ao->dnsaddr[d]) {
andrewbonney	0:ec559500a63f	1040	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
andrewbonney	0:ec559500a63f	1041	d+1, inet_ntoa(tl)));
andrewbonney	0:ec559500a63f	1042	DECPTR(sizeof(u32_t), p);
andrewbonney	0:ec559500a63f	1043	tl = ntohl(ao->dnsaddr[d]);
andrewbonney	0:ec559500a63f	1044	PUTLONG(tl, p);
andrewbonney	0:ec559500a63f	1045	orc = CONFNAK;
andrewbonney	0:ec559500a63f	1046	}
andrewbonney	0:ec559500a63f	1047	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
andrewbonney	0:ec559500a63f	1048	break;
andrewbonney	0:ec559500a63f	1049
andrewbonney	0:ec559500a63f	1050	case CI_MS_WINS1:
andrewbonney	0:ec559500a63f	1051	case CI_MS_WINS2:
andrewbonney	0:ec559500a63f	1052	/* Microsoft primary or secondary WINS request */
andrewbonney	0:ec559500a63f	1053	d = citype == CI_MS_WINS2;
andrewbonney	0:ec559500a63f	1054	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
andrewbonney	0:ec559500a63f	1055
andrewbonney	0:ec559500a63f	1056	/* If we do not have a DNS address then we cannot send it */
andrewbonney	0:ec559500a63f	1057	if (ao->winsaddr[d] == 0 \|\|
andrewbonney	0:ec559500a63f	1058	cilen != CILEN_ADDR) { /* Check CI length */
andrewbonney	0:ec559500a63f	1059	orc = CONFREJ; /* Reject CI */
andrewbonney	0:ec559500a63f	1060	break;
andrewbonney	0:ec559500a63f	1061	}
andrewbonney	0:ec559500a63f	1062	GETLONG(tl, p);
andrewbonney	0:ec559500a63f	1063	if (htonl(tl) != ao->winsaddr[d]) {
andrewbonney	0:ec559500a63f	1064	DECPTR(sizeof(u32_t), p);
andrewbonney	0:ec559500a63f	1065	tl = ntohl(ao->winsaddr[d]);
andrewbonney	0:ec559500a63f	1066	PUTLONG(tl, p);
andrewbonney	0:ec559500a63f	1067	orc = CONFNAK;
andrewbonney	0:ec559500a63f	1068	}
andrewbonney	0:ec559500a63f	1069	break;
andrewbonney	0:ec559500a63f	1070
andrewbonney	0:ec559500a63f	1071	case CI_COMPRESSTYPE:
andrewbonney	0:ec559500a63f	1072	if (!ao->neg_vj) {
andrewbonney	0:ec559500a63f	1073	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
andrewbonney	0:ec559500a63f	1074	orc = CONFREJ;
andrewbonney	0:ec559500a63f	1075	break;
andrewbonney	0:ec559500a63f	1076	} else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
andrewbonney	0:ec559500a63f	1077	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
andrewbonney	0:ec559500a63f	1078	orc = CONFREJ;
andrewbonney	0:ec559500a63f	1079	break;
andrewbonney	0:ec559500a63f	1080	}
andrewbonney	0:ec559500a63f	1081	GETSHORT(cishort, p);
andrewbonney	0:ec559500a63f	1082
andrewbonney	0:ec559500a63f	1083	if (!(cishort == IPCP_VJ_COMP \|\|
andrewbonney	0:ec559500a63f	1084	(cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
andrewbonney	0:ec559500a63f	1085	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
andrewbonney	0:ec559500a63f	1086	orc = CONFREJ;
andrewbonney	0:ec559500a63f	1087	break;
andrewbonney	0:ec559500a63f	1088	}
andrewbonney	0:ec559500a63f	1089
andrewbonney	0:ec559500a63f	1090	ho->neg_vj = 1;
andrewbonney	0:ec559500a63f	1091	ho->vj_protocol = cishort;
andrewbonney	0:ec559500a63f	1092	if (cilen == CILEN_VJ) {
andrewbonney	0:ec559500a63f	1093	GETCHAR(maxslotindex, p);
andrewbonney	0:ec559500a63f	1094	if (maxslotindex > ao->maxslotindex) {
andrewbonney	0:ec559500a63f	1095	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
andrewbonney	0:ec559500a63f	1096	orc = CONFNAK;
andrewbonney	0:ec559500a63f	1097	if (!reject_if_disagree) {
andrewbonney	0:ec559500a63f	1098	DECPTR(1, p);
andrewbonney	0:ec559500a63f	1099	PUTCHAR(ao->maxslotindex, p);
andrewbonney	0:ec559500a63f	1100	}
andrewbonney	0:ec559500a63f	1101	}
andrewbonney	0:ec559500a63f	1102	GETCHAR(cflag, p);
andrewbonney	0:ec559500a63f	1103	if (cflag && !ao->cflag) {
andrewbonney	0:ec559500a63f	1104	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
andrewbonney	0:ec559500a63f	1105	orc = CONFNAK;
andrewbonney	0:ec559500a63f	1106	if (!reject_if_disagree) {
andrewbonney	0:ec559500a63f	1107	DECPTR(1, p);
andrewbonney	0:ec559500a63f	1108	PUTCHAR(wo->cflag, p);
andrewbonney	0:ec559500a63f	1109	}
andrewbonney	0:ec559500a63f	1110	}
andrewbonney	0:ec559500a63f	1111	ho->maxslotindex = maxslotindex;
andrewbonney	0:ec559500a63f	1112	ho->cflag = cflag;
andrewbonney	0:ec559500a63f	1113	} else {
andrewbonney	0:ec559500a63f	1114	ho->old_vj = 1;
andrewbonney	0:ec559500a63f	1115	ho->maxslotindex = MAX_SLOTS - 1;
andrewbonney	0:ec559500a63f	1116	ho->cflag = 1;
andrewbonney	0:ec559500a63f	1117	}
andrewbonney	0:ec559500a63f	1118	IPCPDEBUG(LOG_INFO, (
andrewbonney	0:ec559500a63f	1119	"ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
andrewbonney	0:ec559500a63f	1120	ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
andrewbonney	0:ec559500a63f	1121	break;
andrewbonney	0:ec559500a63f	1122
andrewbonney	0:ec559500a63f	1123	default:
andrewbonney	0:ec559500a63f	1124	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
andrewbonney	0:ec559500a63f	1125	orc = CONFREJ;
andrewbonney	0:ec559500a63f	1126	break;
andrewbonney	0:ec559500a63f	1127	}
andrewbonney	0:ec559500a63f	1128
andrewbonney	0:ec559500a63f	1129	endswitch:
andrewbonney	0:ec559500a63f	1130	if (orc == CONFACK && /* Good CI */
andrewbonney	0:ec559500a63f	1131	rc != CONFACK) { /* but prior CI wasnt? */
andrewbonney	0:ec559500a63f	1132	continue; /* Don't send this one */
andrewbonney	0:ec559500a63f	1133	}
andrewbonney	0:ec559500a63f	1134
andrewbonney	0:ec559500a63f	1135	if (orc == CONFNAK) { /* Nak this CI? */
andrewbonney	0:ec559500a63f	1136	if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
andrewbonney	0:ec559500a63f	1137	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
andrewbonney	0:ec559500a63f	1138	orc = CONFREJ; /* Get tough if so */
andrewbonney	0:ec559500a63f	1139	} else {
andrewbonney	0:ec559500a63f	1140	if (rc == CONFREJ) { /* Rejecting prior CI? */
andrewbonney	0:ec559500a63f	1141	continue; /* Don't send this one */
andrewbonney	0:ec559500a63f	1142	}
andrewbonney	0:ec559500a63f	1143	if (rc == CONFACK) { /* Ack'd all prior CIs? */
andrewbonney	0:ec559500a63f	1144	rc = CONFNAK; /* Not anymore... */
andrewbonney	0:ec559500a63f	1145	ucp = inp; /* Backup */
andrewbonney	0:ec559500a63f	1146	}
andrewbonney	0:ec559500a63f	1147	}
andrewbonney	0:ec559500a63f	1148	}
andrewbonney	0:ec559500a63f	1149
andrewbonney	0:ec559500a63f	1150	if (orc == CONFREJ && /* Reject this CI */
andrewbonney	0:ec559500a63f	1151	rc != CONFREJ) { /* but no prior ones? */
andrewbonney	0:ec559500a63f	1152	rc = CONFREJ;
andrewbonney	0:ec559500a63f	1153	ucp = inp; /* Backup */
andrewbonney	0:ec559500a63f	1154	}
andrewbonney	0:ec559500a63f	1155
andrewbonney	0:ec559500a63f	1156	/* Need to move CI? */
andrewbonney	0:ec559500a63f	1157	if (ucp != cip) {
andrewbonney	0:ec559500a63f	1158	BCOPY(cip, ucp, cilen); /* Move it */
andrewbonney	0:ec559500a63f	1159	}
andrewbonney	0:ec559500a63f	1160
andrewbonney	0:ec559500a63f	1161	/* Update output pointer */
andrewbonney	0:ec559500a63f	1162	INCPTR(cilen, ucp);
andrewbonney	0:ec559500a63f	1163	}
andrewbonney	0:ec559500a63f	1164
andrewbonney	0:ec559500a63f	1165	/*
andrewbonney	0:ec559500a63f	1166	* If we aren't rejecting this packet, and we want to negotiate
andrewbonney	0:ec559500a63f	1167	* their address, and they didn't send their address, then we
andrewbonney	0:ec559500a63f	1168	* send a NAK with a CI_ADDR option appended. We assume the
andrewbonney	0:ec559500a63f	1169	* input buffer is long enough that we can append the extra
andrewbonney	0:ec559500a63f	1170	* option safely.
andrewbonney	0:ec559500a63f	1171	*/
andrewbonney	0:ec559500a63f	1172	if (rc != CONFREJ && !ho->neg_addr &&
andrewbonney	0:ec559500a63f	1173	wo->req_addr && !reject_if_disagree) {
andrewbonney	0:ec559500a63f	1174	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
andrewbonney	0:ec559500a63f	1175	if (rc == CONFACK) {
andrewbonney	0:ec559500a63f	1176	rc = CONFNAK;
andrewbonney	0:ec559500a63f	1177	ucp = inp; /* reset pointer */
andrewbonney	0:ec559500a63f	1178	wo->req_addr = 0; /* don't ask again */
andrewbonney	0:ec559500a63f	1179	}
andrewbonney	0:ec559500a63f	1180	PUTCHAR(CI_ADDR, ucp);
andrewbonney	0:ec559500a63f	1181	PUTCHAR(CILEN_ADDR, ucp);
andrewbonney	0:ec559500a63f	1182	tl = ntohl(wo->hisaddr);
andrewbonney	0:ec559500a63f	1183	PUTLONG(tl, ucp);
andrewbonney	0:ec559500a63f	1184	}
andrewbonney	0:ec559500a63f	1185
andrewbonney	0:ec559500a63f	1186	len = (int)(ucp - inp); / Compute output length */
andrewbonney	0:ec559500a63f	1187	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
andrewbonney	0:ec559500a63f	1188	return (rc); /* Return final code */
andrewbonney	0:ec559500a63f	1189	}
andrewbonney	0:ec559500a63f	1190
andrewbonney	0:ec559500a63f	1191
andrewbonney	0:ec559500a63f	1192	#if 0
andrewbonney	0:ec559500a63f	1193	/*
andrewbonney	0:ec559500a63f	1194	* ip_check_options - check that any IP-related options are OK,
andrewbonney	0:ec559500a63f	1195	* and assign appropriate defaults.
andrewbonney	0:ec559500a63f	1196	*/
andrewbonney	0:ec559500a63f	1197	static void
andrewbonney	0:ec559500a63f	1198	ip_check_options(u_long localAddr)
andrewbonney	0:ec559500a63f	1199	{
andrewbonney	0:ec559500a63f	1200	ipcp_options *wo = &ipcp_wantoptions[0];
andrewbonney	0:ec559500a63f	1201
andrewbonney	0:ec559500a63f	1202	/*
andrewbonney	0:ec559500a63f	1203	* Load our default IP address but allow the remote host to give us
andrewbonney	0:ec559500a63f	1204	* a new address.
andrewbonney	0:ec559500a63f	1205	*/
andrewbonney	0:ec559500a63f	1206	if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
andrewbonney	0:ec559500a63f	1207	wo->accept_local = 1; /* don't insist on this default value */
andrewbonney	0:ec559500a63f	1208	wo->ouraddr = htonl(localAddr);
andrewbonney	0:ec559500a63f	1209	}
andrewbonney	0:ec559500a63f	1210	}
andrewbonney	0:ec559500a63f	1211	#endif
andrewbonney	0:ec559500a63f	1212
andrewbonney	0:ec559500a63f	1213
andrewbonney	0:ec559500a63f	1214	/*
andrewbonney	0:ec559500a63f	1215	* ipcp_up - IPCP has come UP.
andrewbonney	0:ec559500a63f	1216	*
andrewbonney	0:ec559500a63f	1217	* Configure the IP network interface appropriately and bring it up.
andrewbonney	0:ec559500a63f	1218	*/
andrewbonney	0:ec559500a63f	1219	static void
andrewbonney	0:ec559500a63f	1220	ipcp_up(fsm *f)
andrewbonney	0:ec559500a63f	1221	{
andrewbonney	0:ec559500a63f	1222	u32_t mask;
andrewbonney	0:ec559500a63f	1223	ipcp_options *ho = &ipcp_hisoptions[f->unit];
andrewbonney	0:ec559500a63f	1224	ipcp_options *go = &ipcp_gotoptions[f->unit];
andrewbonney	0:ec559500a63f	1225	ipcp_options *wo = &ipcp_wantoptions[f->unit];
andrewbonney	0:ec559500a63f	1226
andrewbonney	0:ec559500a63f	1227	np_up(f->unit, PPP_IP);
andrewbonney	0:ec559500a63f	1228	IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
andrewbonney	0:ec559500a63f	1229
andrewbonney	0:ec559500a63f	1230	/*
andrewbonney	0:ec559500a63f	1231	* We must have a non-zero IP address for both ends of the link.
andrewbonney	0:ec559500a63f	1232	*/
andrewbonney	0:ec559500a63f	1233	if (!ho->neg_addr) {
andrewbonney	0:ec559500a63f	1234	ho->hisaddr = wo->hisaddr;
andrewbonney	0:ec559500a63f	1235	}
andrewbonney	0:ec559500a63f	1236	#ifdef __PPP_STRICT_IMPL__ //DG : Kludge for bad 3g providers PPP impl
andrewbonney	0:ec559500a63f	1237	if (ho->hisaddr == 0) {
andrewbonney	0:ec559500a63f	1238	IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
andrewbonney	0:ec559500a63f	1239	ipcp_close(f->unit, "Could not determine remote IP address");
andrewbonney	0:ec559500a63f	1240	return;
andrewbonney	0:ec559500a63f	1241	}
andrewbonney	0:ec559500a63f	1242	#endif
andrewbonney	0:ec559500a63f	1243	if (go->ouraddr == 0) {
andrewbonney	0:ec559500a63f	1244	IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
andrewbonney	0:ec559500a63f	1245	ipcp_close(f->unit, "Could not determine local IP address");
andrewbonney	0:ec559500a63f	1246	return;
andrewbonney	0:ec559500a63f	1247	}
andrewbonney	0:ec559500a63f	1248
andrewbonney	0:ec559500a63f	1249	if (ppp_settings.usepeerdns && (go->dnsaddr[0] \|\| go->dnsaddr[1])) {
andrewbonney	0:ec559500a63f	1250	/pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);/
andrewbonney	0:ec559500a63f	1251	}
andrewbonney	0:ec559500a63f	1252
andrewbonney	0:ec559500a63f	1253	/*
andrewbonney	0:ec559500a63f	1254	* Check that the peer is allowed to use the IP address it wants.
andrewbonney	0:ec559500a63f	1255	*/
andrewbonney	0:ec559500a63f	1256	if (!auth_ip_addr(f->unit, ho->hisaddr)) {
andrewbonney	0:ec559500a63f	1257	IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
andrewbonney	0:ec559500a63f	1258	inet_ntoa(ho->hisaddr)));
andrewbonney	0:ec559500a63f	1259	ipcp_close(f->unit, "Unauthorized remote IP address");
andrewbonney	0:ec559500a63f	1260	return;
andrewbonney	0:ec559500a63f	1261	}
andrewbonney	0:ec559500a63f	1262
andrewbonney	0:ec559500a63f	1263	/* set tcp compression */
andrewbonney	0:ec559500a63f	1264	sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
andrewbonney	0:ec559500a63f	1265
andrewbonney	0:ec559500a63f	1266	/*
andrewbonney	0:ec559500a63f	1267	* Set IP addresses and (if specified) netmask.
andrewbonney	0:ec559500a63f	1268	*/
andrewbonney	0:ec559500a63f	1269	mask = GetMask(go->ouraddr);
andrewbonney	0:ec559500a63f	1270
andrewbonney	0:ec559500a63f	1271	if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
andrewbonney	0:ec559500a63f	1272	IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
andrewbonney	0:ec559500a63f	1273	ipcp_close(f->unit, "Interface configuration failed");
andrewbonney	0:ec559500a63f	1274	return;
andrewbonney	0:ec559500a63f	1275	}
andrewbonney	0:ec559500a63f	1276
andrewbonney	0:ec559500a63f	1277	/* bring the interface up for IP */
andrewbonney	0:ec559500a63f	1278	if (!sifup(f->unit)) {
andrewbonney	0:ec559500a63f	1279	IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
andrewbonney	0:ec559500a63f	1280	ipcp_close(f->unit, "Interface configuration failed");
andrewbonney	0:ec559500a63f	1281	return;
andrewbonney	0:ec559500a63f	1282	}
andrewbonney	0:ec559500a63f	1283
andrewbonney	0:ec559500a63f	1284	sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
andrewbonney	0:ec559500a63f	1285
andrewbonney	0:ec559500a63f	1286	/* assign a default route through the interface if required */
andrewbonney	0:ec559500a63f	1287	if (ipcp_wantoptions[f->unit].default_route) {
andrewbonney	0:ec559500a63f	1288	if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
andrewbonney	0:ec559500a63f	1289	default_route_set[f->unit] = 1;
andrewbonney	0:ec559500a63f	1290	}
andrewbonney	0:ec559500a63f	1291	}
andrewbonney	0:ec559500a63f	1292
andrewbonney	0:ec559500a63f	1293	IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
andrewbonney	0:ec559500a63f	1294	IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
andrewbonney	0:ec559500a63f	1295	if (go->dnsaddr[0]) {
andrewbonney	0:ec559500a63f	1296	IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
andrewbonney	0:ec559500a63f	1297	}
andrewbonney	0:ec559500a63f	1298	if (go->dnsaddr[1]) {
andrewbonney	0:ec559500a63f	1299	IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
andrewbonney	0:ec559500a63f	1300	}
andrewbonney	0:ec559500a63f	1301	}
andrewbonney	0:ec559500a63f	1302
andrewbonney	0:ec559500a63f	1303
andrewbonney	0:ec559500a63f	1304	/*
andrewbonney	0:ec559500a63f	1305	* ipcp_down - IPCP has gone DOWN.
andrewbonney	0:ec559500a63f	1306	*
andrewbonney	0:ec559500a63f	1307	* Take the IP network interface down, clear its addresses
andrewbonney	0:ec559500a63f	1308	* and delete routes through it.
andrewbonney	0:ec559500a63f	1309	*/
andrewbonney	0:ec559500a63f	1310	static void
andrewbonney	0:ec559500a63f	1311	ipcp_down(fsm *f)
andrewbonney	0:ec559500a63f	1312	{
andrewbonney	0:ec559500a63f	1313	IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
andrewbonney	0:ec559500a63f	1314	np_down(f->unit, PPP_IP);
andrewbonney	0:ec559500a63f	1315	sifvjcomp(f->unit, 0, 0, 0);
andrewbonney	0:ec559500a63f	1316
andrewbonney	0:ec559500a63f	1317	sifdown(f->unit);
andrewbonney	0:ec559500a63f	1318	ipcp_clear_addrs(f->unit);
andrewbonney	0:ec559500a63f	1319	}
andrewbonney	0:ec559500a63f	1320
andrewbonney	0:ec559500a63f	1321
andrewbonney	0:ec559500a63f	1322	/*
andrewbonney	0:ec559500a63f	1323	* ipcp_clear_addrs() - clear the interface addresses, routes, etc.
andrewbonney	0:ec559500a63f	1324	*/
andrewbonney	0:ec559500a63f	1325	static void
andrewbonney	0:ec559500a63f	1326	ipcp_clear_addrs(int unit)
andrewbonney	0:ec559500a63f	1327	{
andrewbonney	0:ec559500a63f	1328	u32_t ouraddr, hisaddr;
andrewbonney	0:ec559500a63f	1329
andrewbonney	0:ec559500a63f	1330	ouraddr = ipcp_gotoptions[unit].ouraddr;
andrewbonney	0:ec559500a63f	1331	hisaddr = ipcp_hisoptions[unit].hisaddr;
andrewbonney	0:ec559500a63f	1332	if (default_route_set[unit]) {
andrewbonney	0:ec559500a63f	1333	cifdefaultroute(unit, ouraddr, hisaddr);
andrewbonney	0:ec559500a63f	1334	default_route_set[unit] = 0;
andrewbonney	0:ec559500a63f	1335	}
andrewbonney	0:ec559500a63f	1336	cifaddr(unit, ouraddr, hisaddr);
andrewbonney	0:ec559500a63f	1337	}
andrewbonney	0:ec559500a63f	1338
andrewbonney	0:ec559500a63f	1339
andrewbonney	0:ec559500a63f	1340	/*
andrewbonney	0:ec559500a63f	1341	* ipcp_finished - possibly shut down the lower layers.
andrewbonney	0:ec559500a63f	1342	*/
andrewbonney	0:ec559500a63f	1343	static void
andrewbonney	0:ec559500a63f	1344	ipcp_finished(fsm *f)
andrewbonney	0:ec559500a63f	1345	{
andrewbonney	0:ec559500a63f	1346	np_finished(f->unit, PPP_IP);
andrewbonney	0:ec559500a63f	1347	}
andrewbonney	0:ec559500a63f	1348
andrewbonney	0:ec559500a63f	1349	#if PPP_ADDITIONAL_CALLBACKS
andrewbonney	0:ec559500a63f	1350	static int
andrewbonney	0:ec559500a63f	1351	ipcp_printpkt(u_char p, int plen, void (printer) (void , char , ...), void *arg)
andrewbonney	0:ec559500a63f	1352	{
andrewbonney	0:ec559500a63f	1353	LWIP_UNUSED_ARG(p);
andrewbonney	0:ec559500a63f	1354	LWIP_UNUSED_ARG(plen);
andrewbonney	0:ec559500a63f	1355	LWIP_UNUSED_ARG(printer);
andrewbonney	0:ec559500a63f	1356	LWIP_UNUSED_ARG(arg);
andrewbonney	0:ec559500a63f	1357	return 0;
andrewbonney	0:ec559500a63f	1358	}
andrewbonney	0:ec559500a63f	1359
andrewbonney	0:ec559500a63f	1360	/*
andrewbonney	0:ec559500a63f	1361	* ip_active_pkt - see if this IP packet is worth bringing the link up for.
andrewbonney	0:ec559500a63f	1362	* We don't bring the link up for IP fragments or for TCP FIN packets
andrewbonney	0:ec559500a63f	1363	* with no data.
andrewbonney	0:ec559500a63f	1364	*/
andrewbonney	0:ec559500a63f	1365	#define IP_HDRLEN 20 /* bytes */
andrewbonney	0:ec559500a63f	1366	#define IP_OFFMASK 0x1fff
andrewbonney	0:ec559500a63f	1367	#define IPPROTO_TCP 6
andrewbonney	0:ec559500a63f	1368	#define TCP_HDRLEN 20
andrewbonney	0:ec559500a63f	1369	#define TH_FIN 0x01
andrewbonney	0:ec559500a63f	1370
andrewbonney	0:ec559500a63f	1371	/*
andrewbonney	0:ec559500a63f	1372	* We use these macros because the IP header may be at an odd address,
andrewbonney	0:ec559500a63f	1373	* and some compilers might use word loads to get th_off or ip_hl.
andrewbonney	0:ec559500a63f	1374	*/
andrewbonney	0:ec559500a63f	1375
andrewbonney	0:ec559500a63f	1376	#define net_short(x) (((x)[0] << 8) + (x)[1])
andrewbonney	0:ec559500a63f	1377	#define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
andrewbonney	0:ec559500a63f	1378	#define get_ipoff(x) net_short((unsigned char *)(x) + 6)
andrewbonney	0:ec559500a63f	1379	#define get_ipproto(x) (((unsigned char *)(x))[9])
andrewbonney	0:ec559500a63f	1380	#define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
andrewbonney	0:ec559500a63f	1381	#define get_tcpflags(x) (((unsigned char *)(x))[13])
andrewbonney	0:ec559500a63f	1382
andrewbonney	0:ec559500a63f	1383	static int
andrewbonney	0:ec559500a63f	1384	ip_active_pkt(u_char *pkt, int len)
andrewbonney	0:ec559500a63f	1385	{
andrewbonney	0:ec559500a63f	1386	u_char *tcp;
andrewbonney	0:ec559500a63f	1387	int hlen;
andrewbonney	0:ec559500a63f	1388
andrewbonney	0:ec559500a63f	1389	len -= PPP_HDRLEN;
andrewbonney	0:ec559500a63f	1390	pkt += PPP_HDRLEN;
andrewbonney	0:ec559500a63f	1391	if (len < IP_HDRLEN) {
andrewbonney	0:ec559500a63f	1392	return 0;
andrewbonney	0:ec559500a63f	1393	}
andrewbonney	0:ec559500a63f	1394	if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
andrewbonney	0:ec559500a63f	1395	return 0;
andrewbonney	0:ec559500a63f	1396	}
andrewbonney	0:ec559500a63f	1397	if (get_ipproto(pkt) != IPPROTO_TCP) {
andrewbonney	0:ec559500a63f	1398	return 1;
andrewbonney	0:ec559500a63f	1399	}
andrewbonney	0:ec559500a63f	1400	hlen = get_iphl(pkt) * 4;
andrewbonney	0:ec559500a63f	1401	if (len < hlen + TCP_HDRLEN) {
andrewbonney	0:ec559500a63f	1402	return 0;
andrewbonney	0:ec559500a63f	1403	}
andrewbonney	0:ec559500a63f	1404	tcp = pkt + hlen;
andrewbonney	0:ec559500a63f	1405	if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
andrewbonney	0:ec559500a63f	1406	return 0;
andrewbonney	0:ec559500a63f	1407	}
andrewbonney	0:ec559500a63f	1408	return 1;
andrewbonney	0:ec559500a63f	1409	}
andrewbonney	0:ec559500a63f	1410	#endif /* PPP_ADDITIONAL_CALLBACKS */
andrewbonney	0:ec559500a63f	1411
andrewbonney	0:ec559500a63f	1412	#endif /* PPP_SUPPORT */

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Type:	Library
Created:	08 Apr 2011
Imports:	86
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	3

lwip/netif/ppp/ipcp.c@0:ec559500a63f, 2011-04-08 (annotated)

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