TCPSpeedTest - I have a problem getting this to work. Server onl…

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Jesper Taxbøl / Mbed 2 deprecated TCPSpeedTest

I have a problem getting this to work. Server only recieves half of the data being sent. Whats wrong

lwip/netif/ppp/ipcp.c@0:66300c77c6e9, 2011-03-29 (annotated)

Committer:: tax
Date:: Tue Mar 29 13:20:15 2011 +0000
Revision:: 0:66300c77c6e9

Who changed what in which revision?

User	Revision	Line number	New contents of line
tax	0:66300c77c6e9	1	/** In contrast to pppd 2.3.1, DNS support has been added, proxy-ARP and
tax	0:66300c77c6e9	2	dial-on-demand has been stripped. */
tax	0:66300c77c6e9	3	/*****************************************************************************
tax	0:66300c77c6e9	4	* ipcp.c - Network PPP IP Control Protocol program file.
tax	0:66300c77c6e9	5	*
tax	0:66300c77c6e9	6	* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
tax	0:66300c77c6e9	7	* portions Copyright (c) 1997 by Global Election Systems Inc.
tax	0:66300c77c6e9	8	*
tax	0:66300c77c6e9	9	* The authors hereby grant permission to use, copy, modify, distribute,
tax	0:66300c77c6e9	10	* and license this software and its documentation for any purpose, provided
tax	0:66300c77c6e9	11	* that existing copyright notices are retained in all copies and that this
tax	0:66300c77c6e9	12	* notice and the following disclaimer are included verbatim in any
tax	0:66300c77c6e9	13	* distributions. No written agreement, license, or royalty fee is required
tax	0:66300c77c6e9	14	* for any of the authorized uses.
tax	0:66300c77c6e9	15	*
tax	0:66300c77c6e9	16	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
tax	0:66300c77c6e9	17	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
tax	0:66300c77c6e9	18	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
tax	0:66300c77c6e9	19	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
tax	0:66300c77c6e9	20	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
tax	0:66300c77c6e9	21	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
tax	0:66300c77c6e9	22	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
tax	0:66300c77c6e9	23	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
tax	0:66300c77c6e9	24	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
tax	0:66300c77c6e9	25	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
tax	0:66300c77c6e9	26	*
tax	0:66300c77c6e9	27	******************************************************************************
tax	0:66300c77c6e9	28	* REVISION HISTORY
tax	0:66300c77c6e9	29	*
tax	0:66300c77c6e9	30	* 03-01-01 Marc Boucher <marc@mbsi.ca>
tax	0:66300c77c6e9	31	* Ported to lwIP.
tax	0:66300c77c6e9	32	* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
tax	0:66300c77c6e9	33	* Original.
tax	0:66300c77c6e9	34	*****************************************************************************/
tax	0:66300c77c6e9	35	/*
tax	0:66300c77c6e9	36	* ipcp.c - PPP IP Control Protocol.
tax	0:66300c77c6e9	37	*
tax	0:66300c77c6e9	38	* Copyright (c) 1989 Carnegie Mellon University.
tax	0:66300c77c6e9	39	* All rights reserved.
tax	0:66300c77c6e9	40	*
tax	0:66300c77c6e9	41	* Redistribution and use in source and binary forms are permitted
tax	0:66300c77c6e9	42	* provided that the above copyright notice and this paragraph are
tax	0:66300c77c6e9	43	* duplicated in all such forms and that any documentation,
tax	0:66300c77c6e9	44	* advertising materials, and other materials related to such
tax	0:66300c77c6e9	45	* distribution and use acknowledge that the software was developed
tax	0:66300c77c6e9	46	* by Carnegie Mellon University. The name of the
tax	0:66300c77c6e9	47	* University may not be used to endorse or promote products derived
tax	0:66300c77c6e9	48	* from this software without specific prior written permission.
tax	0:66300c77c6e9	49	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
tax	0:66300c77c6e9	50	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
tax	0:66300c77c6e9	51	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
tax	0:66300c77c6e9	52	*/
tax	0:66300c77c6e9	53
tax	0:66300c77c6e9	54	#include "lwip/opt.h"
tax	0:66300c77c6e9	55
tax	0:66300c77c6e9	56	#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
tax	0:66300c77c6e9	57
tax	0:66300c77c6e9	58	#include "ppp.h"
tax	0:66300c77c6e9	59	#include "pppdebug.h"
tax	0:66300c77c6e9	60
tax	0:66300c77c6e9	61	#include "auth.h"
tax	0:66300c77c6e9	62	#include "fsm.h"
tax	0:66300c77c6e9	63	#include "vj.h"
tax	0:66300c77c6e9	64	#include "ipcp.h"
tax	0:66300c77c6e9	65
tax	0:66300c77c6e9	66	#include "lwip/inet.h"
tax	0:66300c77c6e9	67
tax	0:66300c77c6e9	68	#include <string.h>
tax	0:66300c77c6e9	69
tax	0:66300c77c6e9	70	/* #define OLD_CI_ADDRS 1 / / Support deprecated address negotiation. */
tax	0:66300c77c6e9	71
tax	0:66300c77c6e9	72	/* global vars */
tax	0:66300c77c6e9	73	ipcp_options ipcp_wantoptions[NUM_PPP]; /* Options that we want to request */
tax	0:66300c77c6e9	74	ipcp_options ipcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
tax	0:66300c77c6e9	75	ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
tax	0:66300c77c6e9	76	ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
tax	0:66300c77c6e9	77
tax	0:66300c77c6e9	78	/* local vars */
tax	0:66300c77c6e9	79	static int default_route_set[NUM_PPP]; /* Have set up a default route */
tax	0:66300c77c6e9	80	static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
tax	0:66300c77c6e9	81
tax	0:66300c77c6e9	82
tax	0:66300c77c6e9	83	/*
tax	0:66300c77c6e9	84	* Callbacks for fsm code. (CI = Configuration Information)
tax	0:66300c77c6e9	85	*/
tax	0:66300c77c6e9	86	static void ipcp_resetci (fsm ); / Reset our CI */
tax	0:66300c77c6e9	87	static int ipcp_cilen (fsm ); / Return length of our CI */
tax	0:66300c77c6e9	88	static void ipcp_addci (fsm , u_char , int ); / Add our CI */
tax	0:66300c77c6e9	89	static int ipcp_ackci (fsm , u_char , int); /* Peer ack'd our CI */
tax	0:66300c77c6e9	90	static int ipcp_nakci (fsm , u_char , int); /* Peer nak'd our CI */
tax	0:66300c77c6e9	91	static int ipcp_rejci (fsm , u_char , int); /* Peer rej'd our CI */
tax	0:66300c77c6e9	92	static int ipcp_reqci (fsm , u_char , int , int); / Rcv CI */
tax	0:66300c77c6e9	93	static void ipcp_up (fsm ); / We're UP */
tax	0:66300c77c6e9	94	static void ipcp_down (fsm ); / We're DOWN */
tax	0:66300c77c6e9	95	#if PPP_ADDITIONAL_CALLBACKS
tax	0:66300c77c6e9	96	static void ipcp_script (fsm , char ); /* Run an up/down script */
tax	0:66300c77c6e9	97	#endif
tax	0:66300c77c6e9	98	static void ipcp_finished (fsm ); / Don't need lower layer */
tax	0:66300c77c6e9	99
tax	0:66300c77c6e9	100
tax	0:66300c77c6e9	101	fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
tax	0:66300c77c6e9	102
tax	0:66300c77c6e9	103
tax	0:66300c77c6e9	104	static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
tax	0:66300c77c6e9	105	ipcp_resetci, /* Reset our Configuration Information */
tax	0:66300c77c6e9	106	ipcp_cilen, /* Length of our Configuration Information */
tax	0:66300c77c6e9	107	ipcp_addci, /* Add our Configuration Information */
tax	0:66300c77c6e9	108	ipcp_ackci, /* ACK our Configuration Information */
tax	0:66300c77c6e9	109	ipcp_nakci, /* NAK our Configuration Information */
tax	0:66300c77c6e9	110	ipcp_rejci, /* Reject our Configuration Information */
tax	0:66300c77c6e9	111	ipcp_reqci, /* Request peer's Configuration Information */
tax	0:66300c77c6e9	112	ipcp_up, /* Called when fsm reaches LS_OPENED state */
tax	0:66300c77c6e9	113	ipcp_down, /* Called when fsm leaves LS_OPENED state */
tax	0:66300c77c6e9	114	NULL, /* Called when we want the lower layer up */
tax	0:66300c77c6e9	115	ipcp_finished, /* Called when we want the lower layer down */
tax	0:66300c77c6e9	116	NULL, /* Called when Protocol-Reject received */
tax	0:66300c77c6e9	117	NULL, /* Retransmission is necessary */
tax	0:66300c77c6e9	118	NULL, /* Called to handle protocol-specific codes */
tax	0:66300c77c6e9	119	"IPCP" /* String name of protocol */
tax	0:66300c77c6e9	120	};
tax	0:66300c77c6e9	121
tax	0:66300c77c6e9	122	/*
tax	0:66300c77c6e9	123	* Protocol entry points from main code.
tax	0:66300c77c6e9	124	*/
tax	0:66300c77c6e9	125	static void ipcp_init (int);
tax	0:66300c77c6e9	126	static void ipcp_open (int);
tax	0:66300c77c6e9	127	static void ipcp_close (int, char *);
tax	0:66300c77c6e9	128	static void ipcp_lowerup (int);
tax	0:66300c77c6e9	129	static void ipcp_lowerdown (int);
tax	0:66300c77c6e9	130	static void ipcp_input (int, u_char *, int);
tax	0:66300c77c6e9	131	static void ipcp_protrej (int);
tax	0:66300c77c6e9	132
tax	0:66300c77c6e9	133
tax	0:66300c77c6e9	134	struct protent ipcp_protent = {
tax	0:66300c77c6e9	135	PPP_IPCP,
tax	0:66300c77c6e9	136	ipcp_init,
tax	0:66300c77c6e9	137	ipcp_input,
tax	0:66300c77c6e9	138	ipcp_protrej,
tax	0:66300c77c6e9	139	ipcp_lowerup,
tax	0:66300c77c6e9	140	ipcp_lowerdown,
tax	0:66300c77c6e9	141	ipcp_open,
tax	0:66300c77c6e9	142	ipcp_close,
tax	0:66300c77c6e9	143	#if PPP_ADDITIONAL_CALLBACKS
tax	0:66300c77c6e9	144	ipcp_printpkt,
tax	0:66300c77c6e9	145	NULL,
tax	0:66300c77c6e9	146	#endif /* PPP_ADDITIONAL_CALLBACKS */
tax	0:66300c77c6e9	147	1,
tax	0:66300c77c6e9	148	"IPCP",
tax	0:66300c77c6e9	149	#if PPP_ADDITIONAL_CALLBACKS
tax	0:66300c77c6e9	150	ip_check_options,
tax	0:66300c77c6e9	151	NULL,
tax	0:66300c77c6e9	152	ip_active_pkt
tax	0:66300c77c6e9	153	#endif /* PPP_ADDITIONAL_CALLBACKS */
tax	0:66300c77c6e9	154	};
tax	0:66300c77c6e9	155
tax	0:66300c77c6e9	156	static void ipcp_clear_addrs (int);
tax	0:66300c77c6e9	157
tax	0:66300c77c6e9	158	/*
tax	0:66300c77c6e9	159	* Lengths of configuration options.
tax	0:66300c77c6e9	160	*/
tax	0:66300c77c6e9	161	#define CILEN_VOID 2
tax	0:66300c77c6e9	162	#define CILEN_COMPRESS 4 /* min length for compression protocol opt. */
tax	0:66300c77c6e9	163	#define CILEN_VJ 6 /* length for RFC1332 Van-Jacobson opt. */
tax	0:66300c77c6e9	164	#define CILEN_ADDR 6 /* new-style single address option */
tax	0:66300c77c6e9	165	#define CILEN_ADDRS 10 /* old-style dual address option */
tax	0:66300c77c6e9	166
tax	0:66300c77c6e9	167
tax	0:66300c77c6e9	168	#define CODENAME(x) ((x) == CONFACK ? "ACK" : \
tax	0:66300c77c6e9	169	(x) == CONFNAK ? "NAK" : "REJ")
tax	0:66300c77c6e9	170
tax	0:66300c77c6e9	171
tax	0:66300c77c6e9	172	/*
tax	0:66300c77c6e9	173	* ipcp_init - Initialize IPCP.
tax	0:66300c77c6e9	174	*/
tax	0:66300c77c6e9	175	static void
tax	0:66300c77c6e9	176	ipcp_init(int unit)
tax	0:66300c77c6e9	177	{
tax	0:66300c77c6e9	178	fsm *f = &ipcp_fsm[unit];
tax	0:66300c77c6e9	179	ipcp_options *wo = &ipcp_wantoptions[unit];
tax	0:66300c77c6e9	180	ipcp_options *ao = &ipcp_allowoptions[unit];
tax	0:66300c77c6e9	181
tax	0:66300c77c6e9	182	f->unit = unit;
tax	0:66300c77c6e9	183	f->protocol = PPP_IPCP;
tax	0:66300c77c6e9	184	f->callbacks = &ipcp_callbacks;
tax	0:66300c77c6e9	185	fsm_init(&ipcp_fsm[unit]);
tax	0:66300c77c6e9	186
tax	0:66300c77c6e9	187	memset(wo, 0, sizeof(*wo));
tax	0:66300c77c6e9	188	memset(ao, 0, sizeof(*ao));
tax	0:66300c77c6e9	189
tax	0:66300c77c6e9	190	wo->neg_addr = 1;
tax	0:66300c77c6e9	191	wo->ouraddr = 0;
tax	0:66300c77c6e9	192	#if VJ_SUPPORT
tax	0:66300c77c6e9	193	wo->neg_vj = 1;
tax	0:66300c77c6e9	194	#else /* VJ_SUPPORT */
tax	0:66300c77c6e9	195	wo->neg_vj = 0;
tax	0:66300c77c6e9	196	#endif /* VJ_SUPPORT */
tax	0:66300c77c6e9	197	wo->vj_protocol = IPCP_VJ_COMP;
tax	0:66300c77c6e9	198	wo->maxslotindex = MAX_SLOTS - 1;
tax	0:66300c77c6e9	199	wo->cflag = 0;
tax	0:66300c77c6e9	200	wo->default_route = 1;
tax	0:66300c77c6e9	201
tax	0:66300c77c6e9	202	ao->neg_addr = 1;
tax	0:66300c77c6e9	203	#if VJ_SUPPORT
tax	0:66300c77c6e9	204	ao->neg_vj = 1;
tax	0:66300c77c6e9	205	#else /* VJ_SUPPORT */
tax	0:66300c77c6e9	206	ao->neg_vj = 0;
tax	0:66300c77c6e9	207	#endif /* VJ_SUPPORT */
tax	0:66300c77c6e9	208	ao->maxslotindex = MAX_SLOTS - 1;
tax	0:66300c77c6e9	209	ao->cflag = 1;
tax	0:66300c77c6e9	210	ao->default_route = 1;
tax	0:66300c77c6e9	211	}
tax	0:66300c77c6e9	212
tax	0:66300c77c6e9	213
tax	0:66300c77c6e9	214	/*
tax	0:66300c77c6e9	215	* ipcp_open - IPCP is allowed to come up.
tax	0:66300c77c6e9	216	*/
tax	0:66300c77c6e9	217	static void
tax	0:66300c77c6e9	218	ipcp_open(int unit)
tax	0:66300c77c6e9	219	{
tax	0:66300c77c6e9	220	fsm_open(&ipcp_fsm[unit]);
tax	0:66300c77c6e9	221	}
tax	0:66300c77c6e9	222
tax	0:66300c77c6e9	223
tax	0:66300c77c6e9	224	/*
tax	0:66300c77c6e9	225	* ipcp_close - Take IPCP down.
tax	0:66300c77c6e9	226	*/
tax	0:66300c77c6e9	227	static void
tax	0:66300c77c6e9	228	ipcp_close(int unit, char *reason)
tax	0:66300c77c6e9	229	{
tax	0:66300c77c6e9	230	fsm_close(&ipcp_fsm[unit], reason);
tax	0:66300c77c6e9	231	}
tax	0:66300c77c6e9	232
tax	0:66300c77c6e9	233
tax	0:66300c77c6e9	234	/*
tax	0:66300c77c6e9	235	* ipcp_lowerup - The lower layer is up.
tax	0:66300c77c6e9	236	*/
tax	0:66300c77c6e9	237	static void
tax	0:66300c77c6e9	238	ipcp_lowerup(int unit)
tax	0:66300c77c6e9	239	{
tax	0:66300c77c6e9	240	fsm_lowerup(&ipcp_fsm[unit]);
tax	0:66300c77c6e9	241	}
tax	0:66300c77c6e9	242
tax	0:66300c77c6e9	243
tax	0:66300c77c6e9	244	/*
tax	0:66300c77c6e9	245	* ipcp_lowerdown - The lower layer is down.
tax	0:66300c77c6e9	246	*/
tax	0:66300c77c6e9	247	static void
tax	0:66300c77c6e9	248	ipcp_lowerdown(int unit)
tax	0:66300c77c6e9	249	{
tax	0:66300c77c6e9	250	fsm_lowerdown(&ipcp_fsm[unit]);
tax	0:66300c77c6e9	251	}
tax	0:66300c77c6e9	252
tax	0:66300c77c6e9	253
tax	0:66300c77c6e9	254	/*
tax	0:66300c77c6e9	255	* ipcp_input - Input IPCP packet.
tax	0:66300c77c6e9	256	*/
tax	0:66300c77c6e9	257	static void
tax	0:66300c77c6e9	258	ipcp_input(int unit, u_char *p, int len)
tax	0:66300c77c6e9	259	{
tax	0:66300c77c6e9	260	fsm_input(&ipcp_fsm[unit], p, len);
tax	0:66300c77c6e9	261	}
tax	0:66300c77c6e9	262
tax	0:66300c77c6e9	263
tax	0:66300c77c6e9	264	/*
tax	0:66300c77c6e9	265	* ipcp_protrej - A Protocol-Reject was received for IPCP.
tax	0:66300c77c6e9	266	*
tax	0:66300c77c6e9	267	* Pretend the lower layer went down, so we shut up.
tax	0:66300c77c6e9	268	*/
tax	0:66300c77c6e9	269	static void
tax	0:66300c77c6e9	270	ipcp_protrej(int unit)
tax	0:66300c77c6e9	271	{
tax	0:66300c77c6e9	272	fsm_lowerdown(&ipcp_fsm[unit]);
tax	0:66300c77c6e9	273	}
tax	0:66300c77c6e9	274
tax	0:66300c77c6e9	275
tax	0:66300c77c6e9	276	/*
tax	0:66300c77c6e9	277	* ipcp_resetci - Reset our CI.
tax	0:66300c77c6e9	278	*/
tax	0:66300c77c6e9	279	static void
tax	0:66300c77c6e9	280	ipcp_resetci(fsm *f)
tax	0:66300c77c6e9	281	{
tax	0:66300c77c6e9	282	ipcp_options *wo = &ipcp_wantoptions[f->unit];
tax	0:66300c77c6e9	283
tax	0:66300c77c6e9	284	wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
tax	0:66300c77c6e9	285	if (wo->ouraddr == 0) {
tax	0:66300c77c6e9	286	wo->accept_local = 1;
tax	0:66300c77c6e9	287	}
tax	0:66300c77c6e9	288	if (wo->hisaddr == 0) {
tax	0:66300c77c6e9	289	wo->accept_remote = 1;
tax	0:66300c77c6e9	290	}
tax	0:66300c77c6e9	291	/* Request DNS addresses from the peer */
tax	0:66300c77c6e9	292	wo->req_dns1 = ppp_settings.usepeerdns;
tax	0:66300c77c6e9	293	wo->req_dns2 = ppp_settings.usepeerdns;
tax	0:66300c77c6e9	294	ipcp_gotoptions[f->unit] = *wo;
tax	0:66300c77c6e9	295	cis_received[f->unit] = 0;
tax	0:66300c77c6e9	296	}
tax	0:66300c77c6e9	297
tax	0:66300c77c6e9	298
tax	0:66300c77c6e9	299	/*
tax	0:66300c77c6e9	300	* ipcp_cilen - Return length of our CI.
tax	0:66300c77c6e9	301	*/
tax	0:66300c77c6e9	302	static int
tax	0:66300c77c6e9	303	ipcp_cilen(fsm *f)
tax	0:66300c77c6e9	304	{
tax	0:66300c77c6e9	305	ipcp_options *go = &ipcp_gotoptions[f->unit];
tax	0:66300c77c6e9	306	ipcp_options *wo = &ipcp_wantoptions[f->unit];
tax	0:66300c77c6e9	307	ipcp_options *ho = &ipcp_hisoptions[f->unit];
tax	0:66300c77c6e9	308
tax	0:66300c77c6e9	309	#define LENCIVJ(neg, old) (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
tax	0:66300c77c6e9	310	#define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
tax	0:66300c77c6e9	311	#define LENCIDNS(neg) (neg ? (CILEN_ADDR) : 0)
tax	0:66300c77c6e9	312
tax	0:66300c77c6e9	313	/*
tax	0:66300c77c6e9	314	* First see if we want to change our options to the old
tax	0:66300c77c6e9	315	* forms because we have received old forms from the peer.
tax	0:66300c77c6e9	316	*/
tax	0:66300c77c6e9	317	if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
tax	0:66300c77c6e9	318	/* use the old style of address negotiation */
tax	0:66300c77c6e9	319	go->neg_addr = 1;
tax	0:66300c77c6e9	320	go->old_addrs = 1;
tax	0:66300c77c6e9	321	}
tax	0:66300c77c6e9	322	if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
tax	0:66300c77c6e9	323	/* try an older style of VJ negotiation */
tax	0:66300c77c6e9	324	if (cis_received[f->unit] == 0) {
tax	0:66300c77c6e9	325	/* keep trying the new style until we see some CI from the peer */
tax	0:66300c77c6e9	326	go->neg_vj = 1;
tax	0:66300c77c6e9	327	} else {
tax	0:66300c77c6e9	328	/* use the old style only if the peer did */
tax	0:66300c77c6e9	329	if (ho->neg_vj && ho->old_vj) {
tax	0:66300c77c6e9	330	go->neg_vj = 1;
tax	0:66300c77c6e9	331	go->old_vj = 1;
tax	0:66300c77c6e9	332	go->vj_protocol = ho->vj_protocol;
tax	0:66300c77c6e9	333	}
tax	0:66300c77c6e9	334	}
tax	0:66300c77c6e9	335	}
tax	0:66300c77c6e9	336
tax	0:66300c77c6e9	337	return (LENCIADDR(go->neg_addr, go->old_addrs) +
tax	0:66300c77c6e9	338	LENCIVJ(go->neg_vj, go->old_vj) +
tax	0:66300c77c6e9	339	LENCIDNS(go->req_dns1) +
tax	0:66300c77c6e9	340	LENCIDNS(go->req_dns2));
tax	0:66300c77c6e9	341	}
tax	0:66300c77c6e9	342
tax	0:66300c77c6e9	343
tax	0:66300c77c6e9	344	/*
tax	0:66300c77c6e9	345	* ipcp_addci - Add our desired CIs to a packet.
tax	0:66300c77c6e9	346	*/
tax	0:66300c77c6e9	347	static void
tax	0:66300c77c6e9	348	ipcp_addci(fsm f, u_char ucp, int *lenp)
tax	0:66300c77c6e9	349	{
tax	0:66300c77c6e9	350	ipcp_options *go = &ipcp_gotoptions[f->unit];
tax	0:66300c77c6e9	351	int len = *lenp;
tax	0:66300c77c6e9	352
tax	0:66300c77c6e9	353	#define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
tax	0:66300c77c6e9	354	if (neg) { \
tax	0:66300c77c6e9	355	int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
tax	0:66300c77c6e9	356	if (len >= vjlen) { \
tax	0:66300c77c6e9	357	PUTCHAR(opt, ucp); \
tax	0:66300c77c6e9	358	PUTCHAR(vjlen, ucp); \
tax	0:66300c77c6e9	359	PUTSHORT(val, ucp); \
tax	0:66300c77c6e9	360	if (!old) { \
tax	0:66300c77c6e9	361	PUTCHAR(maxslotindex, ucp); \
tax	0:66300c77c6e9	362	PUTCHAR(cflag, ucp); \
tax	0:66300c77c6e9	363	} \
tax	0:66300c77c6e9	364	len -= vjlen; \
tax	0:66300c77c6e9	365	} else { \
tax	0:66300c77c6e9	366	neg = 0; \
tax	0:66300c77c6e9	367	} \
tax	0:66300c77c6e9	368	}
tax	0:66300c77c6e9	369
tax	0:66300c77c6e9	370	#define ADDCIADDR(opt, neg, old, val1, val2) \
tax	0:66300c77c6e9	371	if (neg) { \
tax	0:66300c77c6e9	372	int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
tax	0:66300c77c6e9	373	if (len >= addrlen) { \
tax	0:66300c77c6e9	374	u32_t l; \
tax	0:66300c77c6e9	375	PUTCHAR(opt, ucp); \
tax	0:66300c77c6e9	376	PUTCHAR(addrlen, ucp); \
tax	0:66300c77c6e9	377	l = ntohl(val1); \
tax	0:66300c77c6e9	378	PUTLONG(l, ucp); \
tax	0:66300c77c6e9	379	if (old) { \
tax	0:66300c77c6e9	380	l = ntohl(val2); \
tax	0:66300c77c6e9	381	PUTLONG(l, ucp); \
tax	0:66300c77c6e9	382	} \
tax	0:66300c77c6e9	383	len -= addrlen; \
tax	0:66300c77c6e9	384	} else { \
tax	0:66300c77c6e9	385	neg = 0; \
tax	0:66300c77c6e9	386	} \
tax	0:66300c77c6e9	387	}
tax	0:66300c77c6e9	388
tax	0:66300c77c6e9	389	#define ADDCIDNS(opt, neg, addr) \
tax	0:66300c77c6e9	390	if (neg) { \
tax	0:66300c77c6e9	391	if (len >= CILEN_ADDR) { \
tax	0:66300c77c6e9	392	u32_t l; \
tax	0:66300c77c6e9	393	PUTCHAR(opt, ucp); \
tax	0:66300c77c6e9	394	PUTCHAR(CILEN_ADDR, ucp); \
tax	0:66300c77c6e9	395	l = ntohl(addr); \
tax	0:66300c77c6e9	396	PUTLONG(l, ucp); \
tax	0:66300c77c6e9	397	len -= CILEN_ADDR; \
tax	0:66300c77c6e9	398	} else { \
tax	0:66300c77c6e9	399	neg = 0; \
tax	0:66300c77c6e9	400	} \
tax	0:66300c77c6e9	401	}
tax	0:66300c77c6e9	402
tax	0:66300c77c6e9	403	ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
tax	0:66300c77c6e9	404	go->old_addrs, go->ouraddr, go->hisaddr);
tax	0:66300c77c6e9	405
tax	0:66300c77c6e9	406	ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
tax	0:66300c77c6e9	407	go->maxslotindex, go->cflag);
tax	0:66300c77c6e9	408
tax	0:66300c77c6e9	409	ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
tax	0:66300c77c6e9	410
tax	0:66300c77c6e9	411	ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
tax	0:66300c77c6e9	412
tax	0:66300c77c6e9	413	*lenp -= len;
tax	0:66300c77c6e9	414	}
tax	0:66300c77c6e9	415
tax	0:66300c77c6e9	416
tax	0:66300c77c6e9	417	/*
tax	0:66300c77c6e9	418	* ipcp_ackci - Ack our CIs.
tax	0:66300c77c6e9	419	*
tax	0:66300c77c6e9	420	* Returns:
tax	0:66300c77c6e9	421	* 0 - Ack was bad.
tax	0:66300c77c6e9	422	* 1 - Ack was good.
tax	0:66300c77c6e9	423	*/
tax	0:66300c77c6e9	424	static int
tax	0:66300c77c6e9	425	ipcp_ackci(fsm f, u_char p, int len)
tax	0:66300c77c6e9	426	{
tax	0:66300c77c6e9	427	ipcp_options *go = &ipcp_gotoptions[f->unit];
tax	0:66300c77c6e9	428	u_short cilen, citype, cishort;
tax	0:66300c77c6e9	429	u32_t cilong;
tax	0:66300c77c6e9	430	u_char cimaxslotindex, cicflag;
tax	0:66300c77c6e9	431
tax	0:66300c77c6e9	432	/*
tax	0:66300c77c6e9	433	* CIs must be in exactly the same order that we sent...
tax	0:66300c77c6e9	434	* Check packet length and CI length at each step.
tax	0:66300c77c6e9	435	* If we find any deviations, then this packet is bad.
tax	0:66300c77c6e9	436	*/
tax	0:66300c77c6e9	437
tax	0:66300c77c6e9	438	#define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
tax	0:66300c77c6e9	439	if (neg) { \
tax	0:66300c77c6e9	440	int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
tax	0:66300c77c6e9	441	if ((len -= vjlen) < 0) { \
tax	0:66300c77c6e9	442	goto bad; \
tax	0:66300c77c6e9	443	} \
tax	0:66300c77c6e9	444	GETCHAR(citype, p); \
tax	0:66300c77c6e9	445	GETCHAR(cilen, p); \
tax	0:66300c77c6e9	446	if (cilen != vjlen \|\| \
tax	0:66300c77c6e9	447	citype != opt) { \
tax	0:66300c77c6e9	448	goto bad; \
tax	0:66300c77c6e9	449	} \
tax	0:66300c77c6e9	450	GETSHORT(cishort, p); \
tax	0:66300c77c6e9	451	if (cishort != val) { \
tax	0:66300c77c6e9	452	goto bad; \
tax	0:66300c77c6e9	453	} \
tax	0:66300c77c6e9	454	if (!old) { \
tax	0:66300c77c6e9	455	GETCHAR(cimaxslotindex, p); \
tax	0:66300c77c6e9	456	if (cimaxslotindex != maxslotindex) { \
tax	0:66300c77c6e9	457	goto bad; \
tax	0:66300c77c6e9	458	} \
tax	0:66300c77c6e9	459	GETCHAR(cicflag, p); \
tax	0:66300c77c6e9	460	if (cicflag != cflag) { \
tax	0:66300c77c6e9	461	goto bad; \
tax	0:66300c77c6e9	462	} \
tax	0:66300c77c6e9	463	} \
tax	0:66300c77c6e9	464	}
tax	0:66300c77c6e9	465
tax	0:66300c77c6e9	466	#define ACKCIADDR(opt, neg, old, val1, val2) \
tax	0:66300c77c6e9	467	if (neg) { \
tax	0:66300c77c6e9	468	int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
tax	0:66300c77c6e9	469	u32_t l; \
tax	0:66300c77c6e9	470	if ((len -= addrlen) < 0) { \
tax	0:66300c77c6e9	471	goto bad; \
tax	0:66300c77c6e9	472	} \
tax	0:66300c77c6e9	473	GETCHAR(citype, p); \
tax	0:66300c77c6e9	474	GETCHAR(cilen, p); \
tax	0:66300c77c6e9	475	if (cilen != addrlen \|\| \
tax	0:66300c77c6e9	476	citype != opt) { \
tax	0:66300c77c6e9	477	goto bad; \
tax	0:66300c77c6e9	478	} \
tax	0:66300c77c6e9	479	GETLONG(l, p); \
tax	0:66300c77c6e9	480	cilong = htonl(l); \
tax	0:66300c77c6e9	481	if (val1 != cilong) { \
tax	0:66300c77c6e9	482	goto bad; \
tax	0:66300c77c6e9	483	} \
tax	0:66300c77c6e9	484	if (old) { \
tax	0:66300c77c6e9	485	GETLONG(l, p); \
tax	0:66300c77c6e9	486	cilong = htonl(l); \
tax	0:66300c77c6e9	487	if (val2 != cilong) { \
tax	0:66300c77c6e9	488	goto bad; \
tax	0:66300c77c6e9	489	} \
tax	0:66300c77c6e9	490	} \
tax	0:66300c77c6e9	491	}
tax	0:66300c77c6e9	492
tax	0:66300c77c6e9	493	#define ACKCIDNS(opt, neg, addr) \
tax	0:66300c77c6e9	494	if (neg) { \
tax	0:66300c77c6e9	495	u32_t l; \
tax	0:66300c77c6e9	496	if ((len -= CILEN_ADDR) < 0) { \
tax	0:66300c77c6e9	497	goto bad; \
tax	0:66300c77c6e9	498	} \
tax	0:66300c77c6e9	499	GETCHAR(citype, p); \
tax	0:66300c77c6e9	500	GETCHAR(cilen, p); \
tax	0:66300c77c6e9	501	if (cilen != CILEN_ADDR \|\| \
tax	0:66300c77c6e9	502	citype != opt) { \
tax	0:66300c77c6e9	503	goto bad; \
tax	0:66300c77c6e9	504	} \
tax	0:66300c77c6e9	505	GETLONG(l, p); \
tax	0:66300c77c6e9	506	cilong = htonl(l); \
tax	0:66300c77c6e9	507	if (addr != cilong) { \
tax	0:66300c77c6e9	508	goto bad; \
tax	0:66300c77c6e9	509	} \
tax	0:66300c77c6e9	510	}
tax	0:66300c77c6e9	511
tax	0:66300c77c6e9	512	ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
tax	0:66300c77c6e9	513	go->old_addrs, go->ouraddr, go->hisaddr);
tax	0:66300c77c6e9	514
tax	0:66300c77c6e9	515	ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
tax	0:66300c77c6e9	516	go->maxslotindex, go->cflag);
tax	0:66300c77c6e9	517
tax	0:66300c77c6e9	518	ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
tax	0:66300c77c6e9	519
tax	0:66300c77c6e9	520	ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
tax	0:66300c77c6e9	521
tax	0:66300c77c6e9	522	/*
tax	0:66300c77c6e9	523	* If there are any remaining CIs, then this packet is bad.
tax	0:66300c77c6e9	524	*/
tax	0:66300c77c6e9	525	if (len != 0) {
tax	0:66300c77c6e9	526	goto bad;
tax	0:66300c77c6e9	527	}
tax	0:66300c77c6e9	528	return (1);
tax	0:66300c77c6e9	529
tax	0:66300c77c6e9	530	bad:
tax	0:66300c77c6e9	531	IPCPDEBUG(LOG_INFO, ("ipcp_ackci: received bad Ack!\n"));
tax	0:66300c77c6e9	532	return (0);
tax	0:66300c77c6e9	533	}
tax	0:66300c77c6e9	534
tax	0:66300c77c6e9	535	/*
tax	0:66300c77c6e9	536	* ipcp_nakci - Peer has sent a NAK for some of our CIs.
tax	0:66300c77c6e9	537	* This should not modify any state if the Nak is bad
tax	0:66300c77c6e9	538	* or if IPCP is in the LS_OPENED state.
tax	0:66300c77c6e9	539	*
tax	0:66300c77c6e9	540	* Returns:
tax	0:66300c77c6e9	541	* 0 - Nak was bad.
tax	0:66300c77c6e9	542	* 1 - Nak was good.
tax	0:66300c77c6e9	543	*/
tax	0:66300c77c6e9	544	static int
tax	0:66300c77c6e9	545	ipcp_nakci(fsm f, u_char p, int len)
tax	0:66300c77c6e9	546	{
tax	0:66300c77c6e9	547	ipcp_options *go = &ipcp_gotoptions[f->unit];
tax	0:66300c77c6e9	548	u_char cimaxslotindex, cicflag;
tax	0:66300c77c6e9	549	u_char citype, cilen, *next;
tax	0:66300c77c6e9	550	u_short cishort;
tax	0:66300c77c6e9	551	u32_t ciaddr1, ciaddr2, l, cidnsaddr;
tax	0:66300c77c6e9	552	ipcp_options no; /* options we've seen Naks for */
tax	0:66300c77c6e9	553	ipcp_options try; /* options to request next time */
tax	0:66300c77c6e9	554
tax	0:66300c77c6e9	555	BZERO(&no, sizeof(no));
tax	0:66300c77c6e9	556	try = *go;
tax	0:66300c77c6e9	557
tax	0:66300c77c6e9	558	/*
tax	0:66300c77c6e9	559	* Any Nak'd CIs must be in exactly the same order that we sent.
tax	0:66300c77c6e9	560	* Check packet length and CI length at each step.
tax	0:66300c77c6e9	561	* If we find any deviations, then this packet is bad.
tax	0:66300c77c6e9	562	*/
tax	0:66300c77c6e9	563	#define NAKCIADDR(opt, neg, old, code) \
tax	0:66300c77c6e9	564	if (go->neg && \
tax	0:66300c77c6e9	565	len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
tax	0:66300c77c6e9	566	p[1] == cilen && \
tax	0:66300c77c6e9	567	p[0] == opt) { \
tax	0:66300c77c6e9	568	len -= cilen; \
tax	0:66300c77c6e9	569	INCPTR(2, p); \
tax	0:66300c77c6e9	570	GETLONG(l, p); \
tax	0:66300c77c6e9	571	ciaddr1 = htonl(l); \
tax	0:66300c77c6e9	572	if (old) { \
tax	0:66300c77c6e9	573	GETLONG(l, p); \
tax	0:66300c77c6e9	574	ciaddr2 = htonl(l); \
tax	0:66300c77c6e9	575	no.old_addrs = 1; \
tax	0:66300c77c6e9	576	} else { \
tax	0:66300c77c6e9	577	ciaddr2 = 0; \
tax	0:66300c77c6e9	578	} \
tax	0:66300c77c6e9	579	no.neg = 1; \
tax	0:66300c77c6e9	580	code \
tax	0:66300c77c6e9	581	}
tax	0:66300c77c6e9	582
tax	0:66300c77c6e9	583	#define NAKCIVJ(opt, neg, code) \
tax	0:66300c77c6e9	584	if (go->neg && \
tax	0:66300c77c6e9	585	((cilen = p[1]) == CILEN_COMPRESS \|\| cilen == CILEN_VJ) && \
tax	0:66300c77c6e9	586	len >= cilen && \
tax	0:66300c77c6e9	587	p[0] == opt) { \
tax	0:66300c77c6e9	588	len -= cilen; \
tax	0:66300c77c6e9	589	INCPTR(2, p); \
tax	0:66300c77c6e9	590	GETSHORT(cishort, p); \
tax	0:66300c77c6e9	591	no.neg = 1; \
tax	0:66300c77c6e9	592	code \
tax	0:66300c77c6e9	593	}
tax	0:66300c77c6e9	594
tax	0:66300c77c6e9	595	#define NAKCIDNS(opt, neg, code) \
tax	0:66300c77c6e9	596	if (go->neg && \
tax	0:66300c77c6e9	597	((cilen = p[1]) == CILEN_ADDR) && \
tax	0:66300c77c6e9	598	len >= cilen && \
tax	0:66300c77c6e9	599	p[0] == opt) { \
tax	0:66300c77c6e9	600	len -= cilen; \
tax	0:66300c77c6e9	601	INCPTR(2, p); \
tax	0:66300c77c6e9	602	GETLONG(l, p); \
tax	0:66300c77c6e9	603	cidnsaddr = htonl(l); \
tax	0:66300c77c6e9	604	no.neg = 1; \
tax	0:66300c77c6e9	605	code \
tax	0:66300c77c6e9	606	}
tax	0:66300c77c6e9	607
tax	0:66300c77c6e9	608	/*
tax	0:66300c77c6e9	609	* Accept the peer's idea of {our,his} address, if different
tax	0:66300c77c6e9	610	* from our idea, only if the accept_{local,remote} flag is set.
tax	0:66300c77c6e9	611	*/
tax	0:66300c77c6e9	612	NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
tax	0:66300c77c6e9	613	if (go->accept_local && ciaddr1) { /* Do we know our address? */
tax	0:66300c77c6e9	614	try.ouraddr = ciaddr1;
tax	0:66300c77c6e9	615	IPCPDEBUG(LOG_INFO, ("local IP address %s\n",
tax	0:66300c77c6e9	616	inet_ntoa(ciaddr1)));
tax	0:66300c77c6e9	617	}
tax	0:66300c77c6e9	618	if (go->accept_remote && ciaddr2) { /* Does he know his? */
tax	0:66300c77c6e9	619	try.hisaddr = ciaddr2;
tax	0:66300c77c6e9	620	IPCPDEBUG(LOG_INFO, ("remote IP address %s\n",
tax	0:66300c77c6e9	621	inet_ntoa(ciaddr2)));
tax	0:66300c77c6e9	622	}
tax	0:66300c77c6e9	623	);
tax	0:66300c77c6e9	624
tax	0:66300c77c6e9	625	/*
tax	0:66300c77c6e9	626	* Accept the peer's value of maxslotindex provided that it
tax	0:66300c77c6e9	627	* is less than what we asked for. Turn off slot-ID compression
tax	0:66300c77c6e9	628	* if the peer wants. Send old-style compress-type option if
tax	0:66300c77c6e9	629	* the peer wants.
tax	0:66300c77c6e9	630	*/
tax	0:66300c77c6e9	631	NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
tax	0:66300c77c6e9	632	if (cilen == CILEN_VJ) {
tax	0:66300c77c6e9	633	GETCHAR(cimaxslotindex, p);
tax	0:66300c77c6e9	634	GETCHAR(cicflag, p);
tax	0:66300c77c6e9	635	if (cishort == IPCP_VJ_COMP) {
tax	0:66300c77c6e9	636	try.old_vj = 0;
tax	0:66300c77c6e9	637	if (cimaxslotindex < go->maxslotindex) {
tax	0:66300c77c6e9	638	try.maxslotindex = cimaxslotindex;
tax	0:66300c77c6e9	639	}
tax	0:66300c77c6e9	640	if (!cicflag) {
tax	0:66300c77c6e9	641	try.cflag = 0;
tax	0:66300c77c6e9	642	}
tax	0:66300c77c6e9	643	} else {
tax	0:66300c77c6e9	644	try.neg_vj = 0;
tax	0:66300c77c6e9	645	}
tax	0:66300c77c6e9	646	} else {
tax	0:66300c77c6e9	647	if (cishort == IPCP_VJ_COMP \|\| cishort == IPCP_VJ_COMP_OLD) {
tax	0:66300c77c6e9	648	try.old_vj = 1;
tax	0:66300c77c6e9	649	try.vj_protocol = cishort;
tax	0:66300c77c6e9	650	} else {
tax	0:66300c77c6e9	651	try.neg_vj = 0;
tax	0:66300c77c6e9	652	}
tax	0:66300c77c6e9	653	}
tax	0:66300c77c6e9	654	);
tax	0:66300c77c6e9	655
tax	0:66300c77c6e9	656	NAKCIDNS(CI_MS_DNS1, req_dns1,
tax	0:66300c77c6e9	657	try.dnsaddr[0] = cidnsaddr;
tax	0:66300c77c6e9	658	IPCPDEBUG(LOG_INFO, ("primary DNS address %s\n", inet_ntoa(cidnsaddr)));
tax	0:66300c77c6e9	659	);
tax	0:66300c77c6e9	660
tax	0:66300c77c6e9	661	NAKCIDNS(CI_MS_DNS2, req_dns2,
tax	0:66300c77c6e9	662	try.dnsaddr[1] = cidnsaddr;
tax	0:66300c77c6e9	663	IPCPDEBUG(LOG_INFO, ("secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
tax	0:66300c77c6e9	664	);
tax	0:66300c77c6e9	665
tax	0:66300c77c6e9	666	/*
tax	0:66300c77c6e9	667	* There may be remaining CIs, if the peer is requesting negotiation
tax	0:66300c77c6e9	668	* on an option that we didn't include in our request packet.
tax	0:66300c77c6e9	669	* If they want to negotiate about IP addresses, we comply.
tax	0:66300c77c6e9	670	* If they want us to ask for compression, we refuse.
tax	0:66300c77c6e9	671	*/
tax	0:66300c77c6e9	672	while (len > CILEN_VOID) {
tax	0:66300c77c6e9	673	GETCHAR(citype, p);
tax	0:66300c77c6e9	674	GETCHAR(cilen, p);
tax	0:66300c77c6e9	675	if( (len -= cilen) < 0 ) {
tax	0:66300c77c6e9	676	goto bad;
tax	0:66300c77c6e9	677	}
tax	0:66300c77c6e9	678	next = p + cilen - 2;
tax	0:66300c77c6e9	679
tax	0:66300c77c6e9	680	switch (citype) {
tax	0:66300c77c6e9	681	case CI_COMPRESSTYPE:
tax	0:66300c77c6e9	682	if (go->neg_vj \|\| no.neg_vj \|\|
tax	0:66300c77c6e9	683	(cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
tax	0:66300c77c6e9	684	goto bad;
tax	0:66300c77c6e9	685	}
tax	0:66300c77c6e9	686	no.neg_vj = 1;
tax	0:66300c77c6e9	687	break;
tax	0:66300c77c6e9	688	case CI_ADDRS:
tax	0:66300c77c6e9	689	if ((go->neg_addr && go->old_addrs) \|\| no.old_addrs
tax	0:66300c77c6e9	690	\|\| cilen != CILEN_ADDRS) {
tax	0:66300c77c6e9	691	goto bad;
tax	0:66300c77c6e9	692	}
tax	0:66300c77c6e9	693	try.neg_addr = 1;
tax	0:66300c77c6e9	694	try.old_addrs = 1;
tax	0:66300c77c6e9	695	GETLONG(l, p);
tax	0:66300c77c6e9	696	ciaddr1 = htonl(l);
tax	0:66300c77c6e9	697	if (ciaddr1 && go->accept_local) {
tax	0:66300c77c6e9	698	try.ouraddr = ciaddr1;
tax	0:66300c77c6e9	699	}
tax	0:66300c77c6e9	700	GETLONG(l, p);
tax	0:66300c77c6e9	701	ciaddr2 = htonl(l);
tax	0:66300c77c6e9	702	if (ciaddr2 && go->accept_remote) {
tax	0:66300c77c6e9	703	try.hisaddr = ciaddr2;
tax	0:66300c77c6e9	704	}
tax	0:66300c77c6e9	705	no.old_addrs = 1;
tax	0:66300c77c6e9	706	break;
tax	0:66300c77c6e9	707	case CI_ADDR:
tax	0:66300c77c6e9	708	if (go->neg_addr \|\| no.neg_addr \|\| cilen != CILEN_ADDR) {
tax	0:66300c77c6e9	709	goto bad;
tax	0:66300c77c6e9	710	}
tax	0:66300c77c6e9	711	try.old_addrs = 0;
tax	0:66300c77c6e9	712	GETLONG(l, p);
tax	0:66300c77c6e9	713	ciaddr1 = htonl(l);
tax	0:66300c77c6e9	714	if (ciaddr1 && go->accept_local) {
tax	0:66300c77c6e9	715	try.ouraddr = ciaddr1;
tax	0:66300c77c6e9	716	}
tax	0:66300c77c6e9	717	if (try.ouraddr != 0) {
tax	0:66300c77c6e9	718	try.neg_addr = 1;
tax	0:66300c77c6e9	719	}
tax	0:66300c77c6e9	720	no.neg_addr = 1;
tax	0:66300c77c6e9	721	break;
tax	0:66300c77c6e9	722	}
tax	0:66300c77c6e9	723	p = next;
tax	0:66300c77c6e9	724	}
tax	0:66300c77c6e9	725
tax	0:66300c77c6e9	726	/* If there is still anything left, this packet is bad. */
tax	0:66300c77c6e9	727	if (len != 0) {
tax	0:66300c77c6e9	728	goto bad;
tax	0:66300c77c6e9	729	}
tax	0:66300c77c6e9	730
tax	0:66300c77c6e9	731	/*
tax	0:66300c77c6e9	732	* OK, the Nak is good. Now we can update state.
tax	0:66300c77c6e9	733	*/
tax	0:66300c77c6e9	734	if (f->state != LS_OPENED) {
tax	0:66300c77c6e9	735	*go = try;
tax	0:66300c77c6e9	736	}
tax	0:66300c77c6e9	737
tax	0:66300c77c6e9	738	return 1;
tax	0:66300c77c6e9	739
tax	0:66300c77c6e9	740	bad:
tax	0:66300c77c6e9	741	IPCPDEBUG(LOG_INFO, ("ipcp_nakci: received bad Nak!\n"));
tax	0:66300c77c6e9	742	return 0;
tax	0:66300c77c6e9	743	}
tax	0:66300c77c6e9	744
tax	0:66300c77c6e9	745
tax	0:66300c77c6e9	746	/*
tax	0:66300c77c6e9	747	* ipcp_rejci - Reject some of our CIs.
tax	0:66300c77c6e9	748	*/
tax	0:66300c77c6e9	749	static int
tax	0:66300c77c6e9	750	ipcp_rejci(fsm f, u_char p, int len)
tax	0:66300c77c6e9	751	{
tax	0:66300c77c6e9	752	ipcp_options *go = &ipcp_gotoptions[f->unit];
tax	0:66300c77c6e9	753	u_char cimaxslotindex, ciflag, cilen;
tax	0:66300c77c6e9	754	u_short cishort;
tax	0:66300c77c6e9	755	u32_t cilong;
tax	0:66300c77c6e9	756	ipcp_options try; /* options to request next time */
tax	0:66300c77c6e9	757
tax	0:66300c77c6e9	758	try = *go;
tax	0:66300c77c6e9	759	/*
tax	0:66300c77c6e9	760	* Any Rejected CIs must be in exactly the same order that we sent.
tax	0:66300c77c6e9	761	* Check packet length and CI length at each step.
tax	0:66300c77c6e9	762	* If we find any deviations, then this packet is bad.
tax	0:66300c77c6e9	763	*/
tax	0:66300c77c6e9	764	#define REJCIADDR(opt, neg, old, val1, val2) \
tax	0:66300c77c6e9	765	if (go->neg && \
tax	0:66300c77c6e9	766	len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
tax	0:66300c77c6e9	767	p[1] == cilen && \
tax	0:66300c77c6e9	768	p[0] == opt) { \
tax	0:66300c77c6e9	769	u32_t l; \
tax	0:66300c77c6e9	770	len -= cilen; \
tax	0:66300c77c6e9	771	INCPTR(2, p); \
tax	0:66300c77c6e9	772	GETLONG(l, p); \
tax	0:66300c77c6e9	773	cilong = htonl(l); \
tax	0:66300c77c6e9	774	/* Check rejected value. */ \
tax	0:66300c77c6e9	775	if (cilong != val1) { \
tax	0:66300c77c6e9	776	goto bad; \
tax	0:66300c77c6e9	777	} \
tax	0:66300c77c6e9	778	if (old) { \
tax	0:66300c77c6e9	779	GETLONG(l, p); \
tax	0:66300c77c6e9	780	cilong = htonl(l); \
tax	0:66300c77c6e9	781	/* Check rejected value. */ \
tax	0:66300c77c6e9	782	if (cilong != val2) { \
tax	0:66300c77c6e9	783	goto bad; \
tax	0:66300c77c6e9	784	} \
tax	0:66300c77c6e9	785	} \
tax	0:66300c77c6e9	786	try.neg = 0; \
tax	0:66300c77c6e9	787	}
tax	0:66300c77c6e9	788
tax	0:66300c77c6e9	789	#define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
tax	0:66300c77c6e9	790	if (go->neg && \
tax	0:66300c77c6e9	791	p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
tax	0:66300c77c6e9	792	len >= p[1] && \
tax	0:66300c77c6e9	793	p[0] == opt) { \
tax	0:66300c77c6e9	794	len -= p[1]; \
tax	0:66300c77c6e9	795	INCPTR(2, p); \
tax	0:66300c77c6e9	796	GETSHORT(cishort, p); \
tax	0:66300c77c6e9	797	/* Check rejected value. */ \
tax	0:66300c77c6e9	798	if (cishort != val) { \
tax	0:66300c77c6e9	799	goto bad; \
tax	0:66300c77c6e9	800	} \
tax	0:66300c77c6e9	801	if (!old) { \
tax	0:66300c77c6e9	802	GETCHAR(cimaxslotindex, p); \
tax	0:66300c77c6e9	803	if (cimaxslotindex != maxslot) { \
tax	0:66300c77c6e9	804	goto bad; \
tax	0:66300c77c6e9	805	} \
tax	0:66300c77c6e9	806	GETCHAR(ciflag, p); \
tax	0:66300c77c6e9	807	if (ciflag != cflag) { \
tax	0:66300c77c6e9	808	goto bad; \
tax	0:66300c77c6e9	809	} \
tax	0:66300c77c6e9	810	} \
tax	0:66300c77c6e9	811	try.neg = 0; \
tax	0:66300c77c6e9	812	}
tax	0:66300c77c6e9	813
tax	0:66300c77c6e9	814	#define REJCIDNS(opt, neg, dnsaddr) \
tax	0:66300c77c6e9	815	if (go->neg && \
tax	0:66300c77c6e9	816	((cilen = p[1]) == CILEN_ADDR) && \
tax	0:66300c77c6e9	817	len >= cilen && \
tax	0:66300c77c6e9	818	p[0] == opt) { \
tax	0:66300c77c6e9	819	u32_t l; \
tax	0:66300c77c6e9	820	len -= cilen; \
tax	0:66300c77c6e9	821	INCPTR(2, p); \
tax	0:66300c77c6e9	822	GETLONG(l, p); \
tax	0:66300c77c6e9	823	cilong = htonl(l); \
tax	0:66300c77c6e9	824	/* Check rejected value. */ \
tax	0:66300c77c6e9	825	if (cilong != dnsaddr) { \
tax	0:66300c77c6e9	826	goto bad; \
tax	0:66300c77c6e9	827	} \
tax	0:66300c77c6e9	828	try.neg = 0; \
tax	0:66300c77c6e9	829	}
tax	0:66300c77c6e9	830
tax	0:66300c77c6e9	831	REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
tax	0:66300c77c6e9	832	go->old_addrs, go->ouraddr, go->hisaddr);
tax	0:66300c77c6e9	833
tax	0:66300c77c6e9	834	REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
tax	0:66300c77c6e9	835	go->maxslotindex, go->cflag);
tax	0:66300c77c6e9	836
tax	0:66300c77c6e9	837	REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
tax	0:66300c77c6e9	838
tax	0:66300c77c6e9	839	REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
tax	0:66300c77c6e9	840
tax	0:66300c77c6e9	841	/*
tax	0:66300c77c6e9	842	* If there are any remaining CIs, then this packet is bad.
tax	0:66300c77c6e9	843	*/
tax	0:66300c77c6e9	844	if (len != 0) {
tax	0:66300c77c6e9	845	goto bad;
tax	0:66300c77c6e9	846	}
tax	0:66300c77c6e9	847	/*
tax	0:66300c77c6e9	848	* Now we can update state.
tax	0:66300c77c6e9	849	*/
tax	0:66300c77c6e9	850	if (f->state != LS_OPENED) {
tax	0:66300c77c6e9	851	*go = try;
tax	0:66300c77c6e9	852	}
tax	0:66300c77c6e9	853	return 1;
tax	0:66300c77c6e9	854
tax	0:66300c77c6e9	855	bad:
tax	0:66300c77c6e9	856	IPCPDEBUG(LOG_INFO, ("ipcp_rejci: received bad Reject!\n"));
tax	0:66300c77c6e9	857	return 0;
tax	0:66300c77c6e9	858	}
tax	0:66300c77c6e9	859
tax	0:66300c77c6e9	860
tax	0:66300c77c6e9	861	/*
tax	0:66300c77c6e9	862	* ipcp_reqci - Check the peer's requested CIs and send appropriate response.
tax	0:66300c77c6e9	863	*
tax	0:66300c77c6e9	864	* Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
tax	0:66300c77c6e9	865	* appropriately. If reject_if_disagree is non-zero, doesn't return
tax	0:66300c77c6e9	866	* CONFNAK; returns CONFREJ if it can't return CONFACK.
tax	0:66300c77c6e9	867	*/
tax	0:66300c77c6e9	868	static int
tax	0:66300c77c6e9	869	ipcp_reqci(fsm f, u_char inp/* Requested CIs /,int len/* Length of requested CIs */,int reject_if_disagree)
tax	0:66300c77c6e9	870	{
tax	0:66300c77c6e9	871	ipcp_options *wo = &ipcp_wantoptions[f->unit];
tax	0:66300c77c6e9	872	ipcp_options *ho = &ipcp_hisoptions[f->unit];
tax	0:66300c77c6e9	873	ipcp_options *ao = &ipcp_allowoptions[f->unit];
tax	0:66300c77c6e9	874	#ifdef OLD_CI_ADDRS
tax	0:66300c77c6e9	875	ipcp_options *go = &ipcp_gotoptions[f->unit];
tax	0:66300c77c6e9	876	#endif
tax	0:66300c77c6e9	877	u_char cip, next; /* Pointer to current and next CIs */
tax	0:66300c77c6e9	878	u_short cilen, citype; /* Parsed len, type */
tax	0:66300c77c6e9	879	u_short cishort; /* Parsed short value */
tax	0:66300c77c6e9	880	u32_t tl, ciaddr1; /* Parsed address values */
tax	0:66300c77c6e9	881	#ifdef OLD_CI_ADDRS
tax	0:66300c77c6e9	882	u32_t ciaddr2; /* Parsed address values */
tax	0:66300c77c6e9	883	#endif
tax	0:66300c77c6e9	884	int rc = CONFACK; /* Final packet return code */
tax	0:66300c77c6e9	885	int orc; /* Individual option return code */
tax	0:66300c77c6e9	886	u_char p; / Pointer to next char to parse */
tax	0:66300c77c6e9	887	u_char ucp = inp; / Pointer to current output char */
tax	0:66300c77c6e9	888	int l = len; / Length left */
tax	0:66300c77c6e9	889	u_char maxslotindex, cflag;
tax	0:66300c77c6e9	890	int d;
tax	0:66300c77c6e9	891
tax	0:66300c77c6e9	892	cis_received[f->unit] = 1;
tax	0:66300c77c6e9	893
tax	0:66300c77c6e9	894	/*
tax	0:66300c77c6e9	895	* Reset all his options.
tax	0:66300c77c6e9	896	*/
tax	0:66300c77c6e9	897	BZERO(ho, sizeof(*ho));
tax	0:66300c77c6e9	898
tax	0:66300c77c6e9	899	/*
tax	0:66300c77c6e9	900	* Process all his options.
tax	0:66300c77c6e9	901	*/
tax	0:66300c77c6e9	902	next = inp;
tax	0:66300c77c6e9	903	while (l) {
tax	0:66300c77c6e9	904	orc = CONFACK; /* Assume success */
tax	0:66300c77c6e9	905	cip = p = next; /* Remember begining of CI */
tax	0:66300c77c6e9	906	if (l < 2 \|\| /* Not enough data for CI header or */
tax	0:66300c77c6e9	907	p[1] < 2 \|\| /* CI length too small or */
tax	0:66300c77c6e9	908	p[1] > l) { /* CI length too big? */
tax	0:66300c77c6e9	909	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: bad CI length!\n"));
tax	0:66300c77c6e9	910	orc = CONFREJ; /* Reject bad CI */
tax	0:66300c77c6e9	911	cilen = (u_short)l;/* Reject till end of packet */
tax	0:66300c77c6e9	912	l = 0; /* Don't loop again */
tax	0:66300c77c6e9	913	goto endswitch;
tax	0:66300c77c6e9	914	}
tax	0:66300c77c6e9	915	GETCHAR(citype, p); /* Parse CI type */
tax	0:66300c77c6e9	916	GETCHAR(cilen, p); /* Parse CI length */
tax	0:66300c77c6e9	917	l -= cilen; /* Adjust remaining length */
tax	0:66300c77c6e9	918	next += cilen; /* Step to next CI */
tax	0:66300c77c6e9	919
tax	0:66300c77c6e9	920	switch (citype) { /* Check CI type */
tax	0:66300c77c6e9	921	#ifdef OLD_CI_ADDRS /* Need to save space... */
tax	0:66300c77c6e9	922	case CI_ADDRS:
tax	0:66300c77c6e9	923	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received ADDRS\n"));
tax	0:66300c77c6e9	924	if (!ao->neg_addr \|\|
tax	0:66300c77c6e9	925	cilen != CILEN_ADDRS) { /* Check CI length */
tax	0:66300c77c6e9	926	orc = CONFREJ; /* Reject CI */
tax	0:66300c77c6e9	927	break;
tax	0:66300c77c6e9	928	}
tax	0:66300c77c6e9	929
tax	0:66300c77c6e9	930	/*
tax	0:66300c77c6e9	931	* If he has no address, or if we both have his address but
tax	0:66300c77c6e9	932	* disagree about it, then NAK it with our idea.
tax	0:66300c77c6e9	933	* In particular, if we don't know his address, but he does,
tax	0:66300c77c6e9	934	* then accept it.
tax	0:66300c77c6e9	935	*/
tax	0:66300c77c6e9	936	GETLONG(tl, p); /* Parse source address (his) */
tax	0:66300c77c6e9	937	ciaddr1 = htonl(tl);
tax	0:66300c77c6e9	938	IPCPDEBUG(LOG_INFO, ("his addr %s\n", inet_ntoa(ciaddr1)));
tax	0:66300c77c6e9	939	if (ciaddr1 != wo->hisaddr
tax	0:66300c77c6e9	940	&& (ciaddr1 == 0 \|\| !wo->accept_remote)) {
tax	0:66300c77c6e9	941	orc = CONFNAK;
tax	0:66300c77c6e9	942	if (!reject_if_disagree) {
tax	0:66300c77c6e9	943	DECPTR(sizeof(u32_t), p);
tax	0:66300c77c6e9	944	tl = ntohl(wo->hisaddr);
tax	0:66300c77c6e9	945	PUTLONG(tl, p);
tax	0:66300c77c6e9	946	}
tax	0:66300c77c6e9	947	} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
tax	0:66300c77c6e9	948	/*
tax	0:66300c77c6e9	949	* If neither we nor he knows his address, reject the option.
tax	0:66300c77c6e9	950	*/
tax	0:66300c77c6e9	951	orc = CONFREJ;
tax	0:66300c77c6e9	952	wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
tax	0:66300c77c6e9	953	break;
tax	0:66300c77c6e9	954	}
tax	0:66300c77c6e9	955
tax	0:66300c77c6e9	956	/*
tax	0:66300c77c6e9	957	* If he doesn't know our address, or if we both have our address
tax	0:66300c77c6e9	958	* but disagree about it, then NAK it with our idea.
tax	0:66300c77c6e9	959	*/
tax	0:66300c77c6e9	960	GETLONG(tl, p); /* Parse desination address (ours) */
tax	0:66300c77c6e9	961	ciaddr2 = htonl(tl);
tax	0:66300c77c6e9	962	IPCPDEBUG(LOG_INFO, ("our addr %s\n", inet_ntoa(ciaddr2)));
tax	0:66300c77c6e9	963	if (ciaddr2 != wo->ouraddr) {
tax	0:66300c77c6e9	964	if (ciaddr2 == 0 \|\| !wo->accept_local) {
tax	0:66300c77c6e9	965	orc = CONFNAK;
tax	0:66300c77c6e9	966	if (!reject_if_disagree) {
tax	0:66300c77c6e9	967	DECPTR(sizeof(u32_t), p);
tax	0:66300c77c6e9	968	tl = ntohl(wo->ouraddr);
tax	0:66300c77c6e9	969	PUTLONG(tl, p);
tax	0:66300c77c6e9	970	}
tax	0:66300c77c6e9	971	} else {
tax	0:66300c77c6e9	972	go->ouraddr = ciaddr2; /* accept peer's idea */
tax	0:66300c77c6e9	973	}
tax	0:66300c77c6e9	974	}
tax	0:66300c77c6e9	975
tax	0:66300c77c6e9	976	ho->neg_addr = 1;
tax	0:66300c77c6e9	977	ho->old_addrs = 1;
tax	0:66300c77c6e9	978	ho->hisaddr = ciaddr1;
tax	0:66300c77c6e9	979	ho->ouraddr = ciaddr2;
tax	0:66300c77c6e9	980	break;
tax	0:66300c77c6e9	981	#endif
tax	0:66300c77c6e9	982
tax	0:66300c77c6e9	983	case CI_ADDR:
tax	0:66300c77c6e9	984	if (!ao->neg_addr) {
tax	0:66300c77c6e9	985	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR not allowed\n"));
tax	0:66300c77c6e9	986	orc = CONFREJ; /* Reject CI */
tax	0:66300c77c6e9	987	break;
tax	0:66300c77c6e9	988	} else if (cilen != CILEN_ADDR) { /* Check CI length */
tax	0:66300c77c6e9	989	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR bad len\n"));
tax	0:66300c77c6e9	990	orc = CONFREJ; /* Reject CI */
tax	0:66300c77c6e9	991	break;
tax	0:66300c77c6e9	992	}
tax	0:66300c77c6e9	993
tax	0:66300c77c6e9	994	/*
tax	0:66300c77c6e9	995	* If he has no address, or if we both have his address but
tax	0:66300c77c6e9	996	* disagree about it, then NAK it with our idea.
tax	0:66300c77c6e9	997	* In particular, if we don't know his address, but he does,
tax	0:66300c77c6e9	998	* then accept it.
tax	0:66300c77c6e9	999	*/
tax	0:66300c77c6e9	1000	GETLONG(tl, p); /* Parse source address (his) */
tax	0:66300c77c6e9	1001	ciaddr1 = htonl(tl);
tax	0:66300c77c6e9	1002	if (ciaddr1 != wo->hisaddr
tax	0:66300c77c6e9	1003	&& (ciaddr1 == 0 \|\| !wo->accept_remote)) {
tax	0:66300c77c6e9	1004	orc = CONFNAK;
tax	0:66300c77c6e9	1005	if (!reject_if_disagree) {
tax	0:66300c77c6e9	1006	DECPTR(sizeof(u32_t), p);
tax	0:66300c77c6e9	1007	tl = ntohl(wo->hisaddr);
tax	0:66300c77c6e9	1008	PUTLONG(tl, p);
tax	0:66300c77c6e9	1009	}
tax	0:66300c77c6e9	1010	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
tax	0:66300c77c6e9	1011	} else if (ciaddr1 == 0 && wo->hisaddr == 0) {
tax	0:66300c77c6e9	1012	/*
tax	0:66300c77c6e9	1013	* Don't ACK an address of 0.0.0.0 - reject it instead.
tax	0:66300c77c6e9	1014	*/
tax	0:66300c77c6e9	1015	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
tax	0:66300c77c6e9	1016	orc = CONFREJ;
tax	0:66300c77c6e9	1017	wo->req_addr = 0; /* don't NAK with 0.0.0.0 later */
tax	0:66300c77c6e9	1018	break;
tax	0:66300c77c6e9	1019	}
tax	0:66300c77c6e9	1020
tax	0:66300c77c6e9	1021	ho->neg_addr = 1;
tax	0:66300c77c6e9	1022	ho->hisaddr = ciaddr1;
tax	0:66300c77c6e9	1023	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
tax	0:66300c77c6e9	1024	break;
tax	0:66300c77c6e9	1025
tax	0:66300c77c6e9	1026	case CI_MS_DNS1:
tax	0:66300c77c6e9	1027	case CI_MS_DNS2:
tax	0:66300c77c6e9	1028	/* Microsoft primary or secondary DNS request */
tax	0:66300c77c6e9	1029	d = citype == CI_MS_DNS2;
tax	0:66300c77c6e9	1030
tax	0:66300c77c6e9	1031	/* If we do not have a DNS address then we cannot send it */
tax	0:66300c77c6e9	1032	if (ao->dnsaddr[d] == 0 \|\|
tax	0:66300c77c6e9	1033	cilen != CILEN_ADDR) { /* Check CI length */
tax	0:66300c77c6e9	1034	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting DNS%d Request\n", d+1));
tax	0:66300c77c6e9	1035	orc = CONFREJ; /* Reject CI */
tax	0:66300c77c6e9	1036	break;
tax	0:66300c77c6e9	1037	}
tax	0:66300c77c6e9	1038	GETLONG(tl, p);
tax	0:66300c77c6e9	1039	if (htonl(tl) != ao->dnsaddr[d]) {
tax	0:66300c77c6e9	1040	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking DNS%d Request %s\n",
tax	0:66300c77c6e9	1041	d+1, inet_ntoa(tl)));
tax	0:66300c77c6e9	1042	DECPTR(sizeof(u32_t), p);
tax	0:66300c77c6e9	1043	tl = ntohl(ao->dnsaddr[d]);
tax	0:66300c77c6e9	1044	PUTLONG(tl, p);
tax	0:66300c77c6e9	1045	orc = CONFNAK;
tax	0:66300c77c6e9	1046	}
tax	0:66300c77c6e9	1047	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received DNS%d Request\n", d+1));
tax	0:66300c77c6e9	1048	break;
tax	0:66300c77c6e9	1049
tax	0:66300c77c6e9	1050	case CI_MS_WINS1:
tax	0:66300c77c6e9	1051	case CI_MS_WINS2:
tax	0:66300c77c6e9	1052	/* Microsoft primary or secondary WINS request */
tax	0:66300c77c6e9	1053	d = citype == CI_MS_WINS2;
tax	0:66300c77c6e9	1054	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: received WINS%d Request\n", d+1));
tax	0:66300c77c6e9	1055
tax	0:66300c77c6e9	1056	/* If we do not have a DNS address then we cannot send it */
tax	0:66300c77c6e9	1057	if (ao->winsaddr[d] == 0 \|\|
tax	0:66300c77c6e9	1058	cilen != CILEN_ADDR) { /* Check CI length */
tax	0:66300c77c6e9	1059	orc = CONFREJ; /* Reject CI */
tax	0:66300c77c6e9	1060	break;
tax	0:66300c77c6e9	1061	}
tax	0:66300c77c6e9	1062	GETLONG(tl, p);
tax	0:66300c77c6e9	1063	if (htonl(tl) != ao->winsaddr[d]) {
tax	0:66300c77c6e9	1064	DECPTR(sizeof(u32_t), p);
tax	0:66300c77c6e9	1065	tl = ntohl(ao->winsaddr[d]);
tax	0:66300c77c6e9	1066	PUTLONG(tl, p);
tax	0:66300c77c6e9	1067	orc = CONFNAK;
tax	0:66300c77c6e9	1068	}
tax	0:66300c77c6e9	1069	break;
tax	0:66300c77c6e9	1070
tax	0:66300c77c6e9	1071	case CI_COMPRESSTYPE:
tax	0:66300c77c6e9	1072	if (!ao->neg_vj) {
tax	0:66300c77c6e9	1073	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
tax	0:66300c77c6e9	1074	orc = CONFREJ;
tax	0:66300c77c6e9	1075	break;
tax	0:66300c77c6e9	1076	} else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
tax	0:66300c77c6e9	1077	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
tax	0:66300c77c6e9	1078	orc = CONFREJ;
tax	0:66300c77c6e9	1079	break;
tax	0:66300c77c6e9	1080	}
tax	0:66300c77c6e9	1081	GETSHORT(cishort, p);
tax	0:66300c77c6e9	1082
tax	0:66300c77c6e9	1083	if (!(cishort == IPCP_VJ_COMP \|\|
tax	0:66300c77c6e9	1084	(cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
tax	0:66300c77c6e9	1085	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
tax	0:66300c77c6e9	1086	orc = CONFREJ;
tax	0:66300c77c6e9	1087	break;
tax	0:66300c77c6e9	1088	}
tax	0:66300c77c6e9	1089
tax	0:66300c77c6e9	1090	ho->neg_vj = 1;
tax	0:66300c77c6e9	1091	ho->vj_protocol = cishort;
tax	0:66300c77c6e9	1092	if (cilen == CILEN_VJ) {
tax	0:66300c77c6e9	1093	GETCHAR(maxslotindex, p);
tax	0:66300c77c6e9	1094	if (maxslotindex > ao->maxslotindex) {
tax	0:66300c77c6e9	1095	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
tax	0:66300c77c6e9	1096	orc = CONFNAK;
tax	0:66300c77c6e9	1097	if (!reject_if_disagree) {
tax	0:66300c77c6e9	1098	DECPTR(1, p);
tax	0:66300c77c6e9	1099	PUTCHAR(ao->maxslotindex, p);
tax	0:66300c77c6e9	1100	}
tax	0:66300c77c6e9	1101	}
tax	0:66300c77c6e9	1102	GETCHAR(cflag, p);
tax	0:66300c77c6e9	1103	if (cflag && !ao->cflag) {
tax	0:66300c77c6e9	1104	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Naking VJ cflag %d\n", cflag));
tax	0:66300c77c6e9	1105	orc = CONFNAK;
tax	0:66300c77c6e9	1106	if (!reject_if_disagree) {
tax	0:66300c77c6e9	1107	DECPTR(1, p);
tax	0:66300c77c6e9	1108	PUTCHAR(wo->cflag, p);
tax	0:66300c77c6e9	1109	}
tax	0:66300c77c6e9	1110	}
tax	0:66300c77c6e9	1111	ho->maxslotindex = maxslotindex;
tax	0:66300c77c6e9	1112	ho->cflag = cflag;
tax	0:66300c77c6e9	1113	} else {
tax	0:66300c77c6e9	1114	ho->old_vj = 1;
tax	0:66300c77c6e9	1115	ho->maxslotindex = MAX_SLOTS - 1;
tax	0:66300c77c6e9	1116	ho->cflag = 1;
tax	0:66300c77c6e9	1117	}
tax	0:66300c77c6e9	1118	IPCPDEBUG(LOG_INFO, (
tax	0:66300c77c6e9	1119	"ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
tax	0:66300c77c6e9	1120	ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
tax	0:66300c77c6e9	1121	break;
tax	0:66300c77c6e9	1122
tax	0:66300c77c6e9	1123	default:
tax	0:66300c77c6e9	1124	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting unknown CI type %d\n", citype));
tax	0:66300c77c6e9	1125	orc = CONFREJ;
tax	0:66300c77c6e9	1126	break;
tax	0:66300c77c6e9	1127	}
tax	0:66300c77c6e9	1128
tax	0:66300c77c6e9	1129	endswitch:
tax	0:66300c77c6e9	1130	if (orc == CONFACK && /* Good CI */
tax	0:66300c77c6e9	1131	rc != CONFACK) { /* but prior CI wasnt? */
tax	0:66300c77c6e9	1132	continue; /* Don't send this one */
tax	0:66300c77c6e9	1133	}
tax	0:66300c77c6e9	1134
tax	0:66300c77c6e9	1135	if (orc == CONFNAK) { /* Nak this CI? */
tax	0:66300c77c6e9	1136	if (reject_if_disagree) { /* Getting fed up with sending NAKs? */
tax	0:66300c77c6e9	1137	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Rejecting too many naks\n"));
tax	0:66300c77c6e9	1138	orc = CONFREJ; /* Get tough if so */
tax	0:66300c77c6e9	1139	} else {
tax	0:66300c77c6e9	1140	if (rc == CONFREJ) { /* Rejecting prior CI? */
tax	0:66300c77c6e9	1141	continue; /* Don't send this one */
tax	0:66300c77c6e9	1142	}
tax	0:66300c77c6e9	1143	if (rc == CONFACK) { /* Ack'd all prior CIs? */
tax	0:66300c77c6e9	1144	rc = CONFNAK; /* Not anymore... */
tax	0:66300c77c6e9	1145	ucp = inp; /* Backup */
tax	0:66300c77c6e9	1146	}
tax	0:66300c77c6e9	1147	}
tax	0:66300c77c6e9	1148	}
tax	0:66300c77c6e9	1149
tax	0:66300c77c6e9	1150	if (orc == CONFREJ && /* Reject this CI */
tax	0:66300c77c6e9	1151	rc != CONFREJ) { /* but no prior ones? */
tax	0:66300c77c6e9	1152	rc = CONFREJ;
tax	0:66300c77c6e9	1153	ucp = inp; /* Backup */
tax	0:66300c77c6e9	1154	}
tax	0:66300c77c6e9	1155
tax	0:66300c77c6e9	1156	/* Need to move CI? */
tax	0:66300c77c6e9	1157	if (ucp != cip) {
tax	0:66300c77c6e9	1158	BCOPY(cip, ucp, cilen); /* Move it */
tax	0:66300c77c6e9	1159	}
tax	0:66300c77c6e9	1160
tax	0:66300c77c6e9	1161	/* Update output pointer */
tax	0:66300c77c6e9	1162	INCPTR(cilen, ucp);
tax	0:66300c77c6e9	1163	}
tax	0:66300c77c6e9	1164
tax	0:66300c77c6e9	1165	/*
tax	0:66300c77c6e9	1166	* If we aren't rejecting this packet, and we want to negotiate
tax	0:66300c77c6e9	1167	* their address, and they didn't send their address, then we
tax	0:66300c77c6e9	1168	* send a NAK with a CI_ADDR option appended. We assume the
tax	0:66300c77c6e9	1169	* input buffer is long enough that we can append the extra
tax	0:66300c77c6e9	1170	* option safely.
tax	0:66300c77c6e9	1171	*/
tax	0:66300c77c6e9	1172	if (rc != CONFREJ && !ho->neg_addr &&
tax	0:66300c77c6e9	1173	wo->req_addr && !reject_if_disagree) {
tax	0:66300c77c6e9	1174	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: Requesting peer address\n"));
tax	0:66300c77c6e9	1175	if (rc == CONFACK) {
tax	0:66300c77c6e9	1176	rc = CONFNAK;
tax	0:66300c77c6e9	1177	ucp = inp; /* reset pointer */
tax	0:66300c77c6e9	1178	wo->req_addr = 0; /* don't ask again */
tax	0:66300c77c6e9	1179	}
tax	0:66300c77c6e9	1180	PUTCHAR(CI_ADDR, ucp);
tax	0:66300c77c6e9	1181	PUTCHAR(CILEN_ADDR, ucp);
tax	0:66300c77c6e9	1182	tl = ntohl(wo->hisaddr);
tax	0:66300c77c6e9	1183	PUTLONG(tl, ucp);
tax	0:66300c77c6e9	1184	}
tax	0:66300c77c6e9	1185
tax	0:66300c77c6e9	1186	len = (int)(ucp - inp); / Compute output length */
tax	0:66300c77c6e9	1187	IPCPDEBUG(LOG_INFO, ("ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
tax	0:66300c77c6e9	1188	return (rc); /* Return final code */
tax	0:66300c77c6e9	1189	}
tax	0:66300c77c6e9	1190
tax	0:66300c77c6e9	1191
tax	0:66300c77c6e9	1192	#if 0
tax	0:66300c77c6e9	1193	/*
tax	0:66300c77c6e9	1194	* ip_check_options - check that any IP-related options are OK,
tax	0:66300c77c6e9	1195	* and assign appropriate defaults.
tax	0:66300c77c6e9	1196	*/
tax	0:66300c77c6e9	1197	static void
tax	0:66300c77c6e9	1198	ip_check_options(u_long localAddr)
tax	0:66300c77c6e9	1199	{
tax	0:66300c77c6e9	1200	ipcp_options *wo = &ipcp_wantoptions[0];
tax	0:66300c77c6e9	1201
tax	0:66300c77c6e9	1202	/*
tax	0:66300c77c6e9	1203	* Load our default IP address but allow the remote host to give us
tax	0:66300c77c6e9	1204	* a new address.
tax	0:66300c77c6e9	1205	*/
tax	0:66300c77c6e9	1206	if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
tax	0:66300c77c6e9	1207	wo->accept_local = 1; /* don't insist on this default value */
tax	0:66300c77c6e9	1208	wo->ouraddr = htonl(localAddr);
tax	0:66300c77c6e9	1209	}
tax	0:66300c77c6e9	1210	}
tax	0:66300c77c6e9	1211	#endif
tax	0:66300c77c6e9	1212
tax	0:66300c77c6e9	1213
tax	0:66300c77c6e9	1214	/*
tax	0:66300c77c6e9	1215	* ipcp_up - IPCP has come UP.
tax	0:66300c77c6e9	1216	*
tax	0:66300c77c6e9	1217	* Configure the IP network interface appropriately and bring it up.
tax	0:66300c77c6e9	1218	*/
tax	0:66300c77c6e9	1219	static void
tax	0:66300c77c6e9	1220	ipcp_up(fsm *f)
tax	0:66300c77c6e9	1221	{
tax	0:66300c77c6e9	1222	u32_t mask;
tax	0:66300c77c6e9	1223	ipcp_options *ho = &ipcp_hisoptions[f->unit];
tax	0:66300c77c6e9	1224	ipcp_options *go = &ipcp_gotoptions[f->unit];
tax	0:66300c77c6e9	1225	ipcp_options *wo = &ipcp_wantoptions[f->unit];
tax	0:66300c77c6e9	1226
tax	0:66300c77c6e9	1227	np_up(f->unit, PPP_IP);
tax	0:66300c77c6e9	1228	IPCPDEBUG(LOG_INFO, ("ipcp: up\n"));
tax	0:66300c77c6e9	1229
tax	0:66300c77c6e9	1230	/*
tax	0:66300c77c6e9	1231	* We must have a non-zero IP address for both ends of the link.
tax	0:66300c77c6e9	1232	*/
tax	0:66300c77c6e9	1233	if (!ho->neg_addr) {
tax	0:66300c77c6e9	1234	ho->hisaddr = wo->hisaddr;
tax	0:66300c77c6e9	1235	}
tax	0:66300c77c6e9	1236	#ifdef __PPP_STRICT_IMPL__ //DG : Kludge for bad 3g providers PPP impl
tax	0:66300c77c6e9	1237	if (ho->hisaddr == 0) {
tax	0:66300c77c6e9	1238	IPCPDEBUG(LOG_ERR, ("Could not determine remote IP address\n"));
tax	0:66300c77c6e9	1239	ipcp_close(f->unit, "Could not determine remote IP address");
tax	0:66300c77c6e9	1240	return;
tax	0:66300c77c6e9	1241	}
tax	0:66300c77c6e9	1242	#endif
tax	0:66300c77c6e9	1243	if (go->ouraddr == 0) {
tax	0:66300c77c6e9	1244	IPCPDEBUG(LOG_ERR, ("Could not determine local IP address\n"));
tax	0:66300c77c6e9	1245	ipcp_close(f->unit, "Could not determine local IP address");
tax	0:66300c77c6e9	1246	return;
tax	0:66300c77c6e9	1247	}
tax	0:66300c77c6e9	1248
tax	0:66300c77c6e9	1249	if (ppp_settings.usepeerdns && (go->dnsaddr[0] \|\| go->dnsaddr[1])) {
tax	0:66300c77c6e9	1250	/pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);/
tax	0:66300c77c6e9	1251	}
tax	0:66300c77c6e9	1252
tax	0:66300c77c6e9	1253	/*
tax	0:66300c77c6e9	1254	* Check that the peer is allowed to use the IP address it wants.
tax	0:66300c77c6e9	1255	*/
tax	0:66300c77c6e9	1256	if (!auth_ip_addr(f->unit, ho->hisaddr)) {
tax	0:66300c77c6e9	1257	IPCPDEBUG(LOG_ERR, ("Peer is not authorized to use remote address %s\n",
tax	0:66300c77c6e9	1258	inet_ntoa(ho->hisaddr)));
tax	0:66300c77c6e9	1259	ipcp_close(f->unit, "Unauthorized remote IP address");
tax	0:66300c77c6e9	1260	return;
tax	0:66300c77c6e9	1261	}
tax	0:66300c77c6e9	1262
tax	0:66300c77c6e9	1263	/* set tcp compression */
tax	0:66300c77c6e9	1264	sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
tax	0:66300c77c6e9	1265
tax	0:66300c77c6e9	1266	/*
tax	0:66300c77c6e9	1267	* Set IP addresses and (if specified) netmask.
tax	0:66300c77c6e9	1268	*/
tax	0:66300c77c6e9	1269	mask = GetMask(go->ouraddr);
tax	0:66300c77c6e9	1270
tax	0:66300c77c6e9	1271	if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
tax	0:66300c77c6e9	1272	IPCPDEBUG(LOG_WARNING, ("sifaddr failed\n"));
tax	0:66300c77c6e9	1273	ipcp_close(f->unit, "Interface configuration failed");
tax	0:66300c77c6e9	1274	return;
tax	0:66300c77c6e9	1275	}
tax	0:66300c77c6e9	1276
tax	0:66300c77c6e9	1277	/* bring the interface up for IP */
tax	0:66300c77c6e9	1278	if (!sifup(f->unit)) {
tax	0:66300c77c6e9	1279	IPCPDEBUG(LOG_WARNING, ("sifup failed\n"));
tax	0:66300c77c6e9	1280	ipcp_close(f->unit, "Interface configuration failed");
tax	0:66300c77c6e9	1281	return;
tax	0:66300c77c6e9	1282	}
tax	0:66300c77c6e9	1283
tax	0:66300c77c6e9	1284	sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
tax	0:66300c77c6e9	1285
tax	0:66300c77c6e9	1286	/* assign a default route through the interface if required */
tax	0:66300c77c6e9	1287	if (ipcp_wantoptions[f->unit].default_route) {
tax	0:66300c77c6e9	1288	if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
tax	0:66300c77c6e9	1289	default_route_set[f->unit] = 1;
tax	0:66300c77c6e9	1290	}
tax	0:66300c77c6e9	1291	}
tax	0:66300c77c6e9	1292
tax	0:66300c77c6e9	1293	IPCPDEBUG(LOG_NOTICE, ("local IP address %s\n", inet_ntoa(go->ouraddr)));
tax	0:66300c77c6e9	1294	IPCPDEBUG(LOG_NOTICE, ("remote IP address %s\n", inet_ntoa(ho->hisaddr)));
tax	0:66300c77c6e9	1295	if (go->dnsaddr[0]) {
tax	0:66300c77c6e9	1296	IPCPDEBUG(LOG_NOTICE, ("primary DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
tax	0:66300c77c6e9	1297	}
tax	0:66300c77c6e9	1298	if (go->dnsaddr[1]) {
tax	0:66300c77c6e9	1299	IPCPDEBUG(LOG_NOTICE, ("secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
tax	0:66300c77c6e9	1300	}
tax	0:66300c77c6e9	1301	}
tax	0:66300c77c6e9	1302
tax	0:66300c77c6e9	1303
tax	0:66300c77c6e9	1304	/*
tax	0:66300c77c6e9	1305	* ipcp_down - IPCP has gone DOWN.
tax	0:66300c77c6e9	1306	*
tax	0:66300c77c6e9	1307	* Take the IP network interface down, clear its addresses
tax	0:66300c77c6e9	1308	* and delete routes through it.
tax	0:66300c77c6e9	1309	*/
tax	0:66300c77c6e9	1310	static void
tax	0:66300c77c6e9	1311	ipcp_down(fsm *f)
tax	0:66300c77c6e9	1312	{
tax	0:66300c77c6e9	1313	IPCPDEBUG(LOG_INFO, ("ipcp: down\n"));
tax	0:66300c77c6e9	1314	np_down(f->unit, PPP_IP);
tax	0:66300c77c6e9	1315	sifvjcomp(f->unit, 0, 0, 0);
tax	0:66300c77c6e9	1316
tax	0:66300c77c6e9	1317	sifdown(f->unit);
tax	0:66300c77c6e9	1318	ipcp_clear_addrs(f->unit);
tax	0:66300c77c6e9	1319	}
tax	0:66300c77c6e9	1320
tax	0:66300c77c6e9	1321
tax	0:66300c77c6e9	1322	/*
tax	0:66300c77c6e9	1323	* ipcp_clear_addrs() - clear the interface addresses, routes, etc.
tax	0:66300c77c6e9	1324	*/
tax	0:66300c77c6e9	1325	static void
tax	0:66300c77c6e9	1326	ipcp_clear_addrs(int unit)
tax	0:66300c77c6e9	1327	{
tax	0:66300c77c6e9	1328	u32_t ouraddr, hisaddr;
tax	0:66300c77c6e9	1329
tax	0:66300c77c6e9	1330	ouraddr = ipcp_gotoptions[unit].ouraddr;
tax	0:66300c77c6e9	1331	hisaddr = ipcp_hisoptions[unit].hisaddr;
tax	0:66300c77c6e9	1332	if (default_route_set[unit]) {
tax	0:66300c77c6e9	1333	cifdefaultroute(unit, ouraddr, hisaddr);
tax	0:66300c77c6e9	1334	default_route_set[unit] = 0;
tax	0:66300c77c6e9	1335	}
tax	0:66300c77c6e9	1336	cifaddr(unit, ouraddr, hisaddr);
tax	0:66300c77c6e9	1337	}
tax	0:66300c77c6e9	1338
tax	0:66300c77c6e9	1339
tax	0:66300c77c6e9	1340	/*
tax	0:66300c77c6e9	1341	* ipcp_finished - possibly shut down the lower layers.
tax	0:66300c77c6e9	1342	*/
tax	0:66300c77c6e9	1343	static void
tax	0:66300c77c6e9	1344	ipcp_finished(fsm *f)
tax	0:66300c77c6e9	1345	{
tax	0:66300c77c6e9	1346	np_finished(f->unit, PPP_IP);
tax	0:66300c77c6e9	1347	}
tax	0:66300c77c6e9	1348
tax	0:66300c77c6e9	1349	#if PPP_ADDITIONAL_CALLBACKS
tax	0:66300c77c6e9	1350	static int
tax	0:66300c77c6e9	1351	ipcp_printpkt(u_char p, int plen, void (printer) (void , char , ...), void *arg)
tax	0:66300c77c6e9	1352	{
tax	0:66300c77c6e9	1353	LWIP_UNUSED_ARG(p);
tax	0:66300c77c6e9	1354	LWIP_UNUSED_ARG(plen);
tax	0:66300c77c6e9	1355	LWIP_UNUSED_ARG(printer);
tax	0:66300c77c6e9	1356	LWIP_UNUSED_ARG(arg);
tax	0:66300c77c6e9	1357	return 0;
tax	0:66300c77c6e9	1358	}
tax	0:66300c77c6e9	1359
tax	0:66300c77c6e9	1360	/*
tax	0:66300c77c6e9	1361	* ip_active_pkt - see if this IP packet is worth bringing the link up for.
tax	0:66300c77c6e9	1362	* We don't bring the link up for IP fragments or for TCP FIN packets
tax	0:66300c77c6e9	1363	* with no data.
tax	0:66300c77c6e9	1364	*/
tax	0:66300c77c6e9	1365	#define IP_HDRLEN 20 /* bytes */
tax	0:66300c77c6e9	1366	#define IP_OFFMASK 0x1fff
tax	0:66300c77c6e9	1367	#define IPPROTO_TCP 6
tax	0:66300c77c6e9	1368	#define TCP_HDRLEN 20
tax	0:66300c77c6e9	1369	#define TH_FIN 0x01
tax	0:66300c77c6e9	1370
tax	0:66300c77c6e9	1371	/*
tax	0:66300c77c6e9	1372	* We use these macros because the IP header may be at an odd address,
tax	0:66300c77c6e9	1373	* and some compilers might use word loads to get th_off or ip_hl.
tax	0:66300c77c6e9	1374	*/
tax	0:66300c77c6e9	1375
tax	0:66300c77c6e9	1376	#define net_short(x) (((x)[0] << 8) + (x)[1])
tax	0:66300c77c6e9	1377	#define get_iphl(x) (((unsigned char *)(x))[0] & 0xF)
tax	0:66300c77c6e9	1378	#define get_ipoff(x) net_short((unsigned char *)(x) + 6)
tax	0:66300c77c6e9	1379	#define get_ipproto(x) (((unsigned char *)(x))[9])
tax	0:66300c77c6e9	1380	#define get_tcpoff(x) (((unsigned char *)(x))[12] >> 4)
tax	0:66300c77c6e9	1381	#define get_tcpflags(x) (((unsigned char *)(x))[13])
tax	0:66300c77c6e9	1382
tax	0:66300c77c6e9	1383	static int
tax	0:66300c77c6e9	1384	ip_active_pkt(u_char *pkt, int len)
tax	0:66300c77c6e9	1385	{
tax	0:66300c77c6e9	1386	u_char *tcp;
tax	0:66300c77c6e9	1387	int hlen;
tax	0:66300c77c6e9	1388
tax	0:66300c77c6e9	1389	len -= PPP_HDRLEN;
tax	0:66300c77c6e9	1390	pkt += PPP_HDRLEN;
tax	0:66300c77c6e9	1391	if (len < IP_HDRLEN) {
tax	0:66300c77c6e9	1392	return 0;
tax	0:66300c77c6e9	1393	}
tax	0:66300c77c6e9	1394	if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
tax	0:66300c77c6e9	1395	return 0;
tax	0:66300c77c6e9	1396	}
tax	0:66300c77c6e9	1397	if (get_ipproto(pkt) != IPPROTO_TCP) {
tax	0:66300c77c6e9	1398	return 1;
tax	0:66300c77c6e9	1399	}
tax	0:66300c77c6e9	1400	hlen = get_iphl(pkt) * 4;
tax	0:66300c77c6e9	1401	if (len < hlen + TCP_HDRLEN) {
tax	0:66300c77c6e9	1402	return 0;
tax	0:66300c77c6e9	1403	}
tax	0:66300c77c6e9	1404	tcp = pkt + hlen;
tax	0:66300c77c6e9	1405	if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
tax	0:66300c77c6e9	1406	return 0;
tax	0:66300c77c6e9	1407	}
tax	0:66300c77c6e9	1408	return 1;
tax	0:66300c77c6e9	1409	}
tax	0:66300c77c6e9	1410	#endif /* PPP_ADDITIONAL_CALLBACKS */
tax	0:66300c77c6e9	1411
tax	0:66300c77c6e9	1412	#endif /* PPP_SUPPORT */

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	29 Mar 2011
Imports:	16
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	2

lwip/netif/ppp/ipcp.c@0:66300c77c6e9, 2011-03-29 (annotated)

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