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lwip/netif/ppp/ppp_oe.c@0:632c9925f013, 2010-06-11 (annotated)

Committer:: donatien
Date:: Fri Jun 11 16:05:15 2010 +0000
Revision:: 0:632c9925f013
Child:: 4:fd826cad83c0

Who changed what in which revision?

User	Revision	Line number	New contents of line
donatien	0:632c9925f013	1	/*****************************************************************************
donatien	0:632c9925f013	2	* ppp_oe.c - PPP Over Ethernet implementation for lwIP.
donatien	0:632c9925f013	3	*
donatien	0:632c9925f013	4	* Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc.
donatien	0:632c9925f013	5	*
donatien	0:632c9925f013	6	* The authors hereby grant permission to use, copy, modify, distribute,
donatien	0:632c9925f013	7	* and license this software and its documentation for any purpose, provided
donatien	0:632c9925f013	8	* that existing copyright notices are retained in all copies and that this
donatien	0:632c9925f013	9	* notice and the following disclaimer are included verbatim in any
donatien	0:632c9925f013	10	* distributions. No written agreement, license, or royalty fee is required
donatien	0:632c9925f013	11	* for any of the authorized uses.
donatien	0:632c9925f013	12	*
donatien	0:632c9925f013	13	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
donatien	0:632c9925f013	14	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
donatien	0:632c9925f013	15	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
donatien	0:632c9925f013	16	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
donatien	0:632c9925f013	17	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
donatien	0:632c9925f013	18	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
donatien	0:632c9925f013	19	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
donatien	0:632c9925f013	20	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
donatien	0:632c9925f013	21	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
donatien	0:632c9925f013	22	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
donatien	0:632c9925f013	23	*
donatien	0:632c9925f013	24	******************************************************************************
donatien	0:632c9925f013	25	* REVISION HISTORY
donatien	0:632c9925f013	26	*
donatien	0:632c9925f013	27	* 06-01-01 Marc Boucher <marc@mbsi.ca>
donatien	0:632c9925f013	28	* Ported to lwIP.
donatien	0:632c9925f013	29	*****************************************************************************/
donatien	0:632c9925f013	30
donatien	0:632c9925f013	31
donatien	0:632c9925f013	32
donatien	0:632c9925f013	33	/* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */
donatien	0:632c9925f013	34
donatien	0:632c9925f013	35	/*-
donatien	0:632c9925f013	36	* Copyright (c) 2002 The NetBSD Foundation, Inc.
donatien	0:632c9925f013	37	* All rights reserved.
donatien	0:632c9925f013	38	*
donatien	0:632c9925f013	39	* This code is derived from software contributed to The NetBSD Foundation
donatien	0:632c9925f013	40	* by Martin Husemann <martin@NetBSD.org>.
donatien	0:632c9925f013	41	*
donatien	0:632c9925f013	42	* Redistribution and use in source and binary forms, with or without
donatien	0:632c9925f013	43	* modification, are permitted provided that the following conditions
donatien	0:632c9925f013	44	* are met:
donatien	0:632c9925f013	45	* 1. Redistributions of source code must retain the above copyright
donatien	0:632c9925f013	46	* notice, this list of conditions and the following disclaimer.
donatien	0:632c9925f013	47	* 2. Redistributions in binary form must reproduce the above copyright
donatien	0:632c9925f013	48	* notice, this list of conditions and the following disclaimer in the
donatien	0:632c9925f013	49	* documentation and/or other materials provided with the distribution.
donatien	0:632c9925f013	50	* 3. All advertising materials mentioning features or use of this software
donatien	0:632c9925f013	51	* must display the following acknowledgement:
donatien	0:632c9925f013	52	* This product includes software developed by the NetBSD
donatien	0:632c9925f013	53	* Foundation, Inc. and its contributors.
donatien	0:632c9925f013	54	* 4. Neither the name of The NetBSD Foundation nor the names of its
donatien	0:632c9925f013	55	* contributors may be used to endorse or promote products derived
donatien	0:632c9925f013	56	* from this software without specific prior written permission.
donatien	0:632c9925f013	57	*
donatien	0:632c9925f013	58	* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
donatien	0:632c9925f013	59	* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
donatien	0:632c9925f013	60	* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
donatien	0:632c9925f013	61	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
donatien	0:632c9925f013	62	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
donatien	0:632c9925f013	63	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
donatien	0:632c9925f013	64	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
donatien	0:632c9925f013	65	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
donatien	0:632c9925f013	66	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
donatien	0:632c9925f013	67	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
donatien	0:632c9925f013	68	* POSSIBILITY OF SUCH DAMAGE.
donatien	0:632c9925f013	69	*/
donatien	0:632c9925f013	70
donatien	0:632c9925f013	71	#include "lwip/opt.h"
donatien	0:632c9925f013	72
donatien	0:632c9925f013	73	#if PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */
donatien	0:632c9925f013	74
donatien	0:632c9925f013	75	#include "ppp.h"
donatien	0:632c9925f013	76	#include "pppdebug.h"
donatien	0:632c9925f013	77
donatien	0:632c9925f013	78	#include "lwip/timers.h"
donatien	0:632c9925f013	79
donatien	0:632c9925f013	80	#include "netif/ppp_oe.h"
donatien	0:632c9925f013	81
donatien	0:632c9925f013	82	#include <string.h>
donatien	0:632c9925f013	83	#include <stdio.h>
donatien	0:632c9925f013	84
donatien	0:632c9925f013	85	/** @todo Replace this part with a simple list like other lwIP lists */
donatien	0:632c9925f013	86	#ifndef _SYS_QUEUE_H_
donatien	0:632c9925f013	87	#define _SYS_QUEUE_H_
donatien	0:632c9925f013	88
donatien	0:632c9925f013	89	/*
donatien	0:632c9925f013	90	* A list is headed by a single forward pointer (or an array of forward
donatien	0:632c9925f013	91	* pointers for a hash table header). The elements are doubly linked
donatien	0:632c9925f013	92	* so that an arbitrary element can be removed without a need to
donatien	0:632c9925f013	93	* traverse the list. New elements can be added to the list before
donatien	0:632c9925f013	94	* or after an existing element or at the head of the list. A list
donatien	0:632c9925f013	95	* may only be traversed in the forward direction.
donatien	0:632c9925f013	96	*
donatien	0:632c9925f013	97	* For details on the use of these macros, see the queue(3) manual page.
donatien	0:632c9925f013	98	*/
donatien	0:632c9925f013	99
donatien	0:632c9925f013	100	/*
donatien	0:632c9925f013	101	* List declarations.
donatien	0:632c9925f013	102	*/
donatien	0:632c9925f013	103	#define LIST_HEAD(name, type) \
donatien	0:632c9925f013	104	struct name { \
donatien	0:632c9925f013	105	struct type lh_first; / first element */ \
donatien	0:632c9925f013	106	}
donatien	0:632c9925f013	107
donatien	0:632c9925f013	108	#define LIST_HEAD_INITIALIZER(head) \
donatien	0:632c9925f013	109	{ NULL }
donatien	0:632c9925f013	110
donatien	0:632c9925f013	111	#define LIST_ENTRY(type) \
donatien	0:632c9925f013	112	struct { \
donatien	0:632c9925f013	113	struct type le_next; / next element */ \
donatien	0:632c9925f013	114	struct type *le_prev; / address of previous next element */ \
donatien	0:632c9925f013	115	}
donatien	0:632c9925f013	116
donatien	0:632c9925f013	117	/*
donatien	0:632c9925f013	118	* List functions.
donatien	0:632c9925f013	119	*/
donatien	0:632c9925f013	120
donatien	0:632c9925f013	121	#define LIST_EMPTY(head) ((head)->lh_first == NULL)
donatien	0:632c9925f013	122
donatien	0:632c9925f013	123	#define LIST_FIRST(head) ((head)->lh_first)
donatien	0:632c9925f013	124
donatien	0:632c9925f013	125	#define LIST_FOREACH(var, head, field) \
donatien	0:632c9925f013	126	for ((var) = LIST_FIRST((head)); \
donatien	0:632c9925f013	127	(var); \
donatien	0:632c9925f013	128	(var) = LIST_NEXT((var), field))
donatien	0:632c9925f013	129
donatien	0:632c9925f013	130	#define LIST_INIT(head) do { \
donatien	0:632c9925f013	131	LIST_FIRST((head)) = NULL; \
donatien	0:632c9925f013	132	} while (0)
donatien	0:632c9925f013	133
donatien	0:632c9925f013	134	#define LIST_INSERT_AFTER(listelm, elm, field) do { \
donatien	0:632c9925f013	135	if ((LIST_NEXT((elm), field) = LIST_NEXT((listelm), field)) != NULL) \
donatien	0:632c9925f013	136	LIST_NEXT((listelm), field)->field.le_prev = \
donatien	0:632c9925f013	137	&LIST_NEXT((elm), field); \
donatien	0:632c9925f013	138	LIST_NEXT((listelm), field) = (elm); \
donatien	0:632c9925f013	139	(elm)->field.le_prev = &LIST_NEXT((listelm), field); \
donatien	0:632c9925f013	140	} while (0)
donatien	0:632c9925f013	141
donatien	0:632c9925f013	142	#define LIST_INSERT_BEFORE(listelm, elm, field) do { \
donatien	0:632c9925f013	143	(elm)->field.le_prev = (listelm)->field.le_prev; \
donatien	0:632c9925f013	144	LIST_NEXT((elm), field) = (listelm); \
donatien	0:632c9925f013	145	*(listelm)->field.le_prev = (elm); \
donatien	0:632c9925f013	146	(listelm)->field.le_prev = &LIST_NEXT((elm), field); \
donatien	0:632c9925f013	147	} while (0)
donatien	0:632c9925f013	148
donatien	0:632c9925f013	149	#define LIST_INSERT_HEAD(head, elm, field) do { \
donatien	0:632c9925f013	150	if ((LIST_NEXT((elm), field) = LIST_FIRST((head))) != NULL) \
donatien	0:632c9925f013	151	LIST_FIRST((head))->field.le_prev = &LIST_NEXT((elm), field); \
donatien	0:632c9925f013	152	LIST_FIRST((head)) = (elm); \
donatien	0:632c9925f013	153	(elm)->field.le_prev = &LIST_FIRST((head)); \
donatien	0:632c9925f013	154	} while (0)
donatien	0:632c9925f013	155
donatien	0:632c9925f013	156	#define LIST_NEXT(elm, field) ((elm)->field.le_next)
donatien	0:632c9925f013	157
donatien	0:632c9925f013	158	#define LIST_REMOVE(elm, field) do { \
donatien	0:632c9925f013	159	if (LIST_NEXT((elm), field) != NULL) \
donatien	0:632c9925f013	160	LIST_NEXT((elm), field)->field.le_prev = \
donatien	0:632c9925f013	161	(elm)->field.le_prev; \
donatien	0:632c9925f013	162	*(elm)->field.le_prev = LIST_NEXT((elm), field); \
donatien	0:632c9925f013	163	} while (0)
donatien	0:632c9925f013	164
donatien	0:632c9925f013	165	#endif /* !_SYS_QUEUE_H_ */
donatien	0:632c9925f013	166
donatien	0:632c9925f013	167
donatien	0:632c9925f013	168	/* Add a 16 bit unsigned value to a buffer pointed to by PTR */
donatien	0:632c9925f013	169	#define PPPOE_ADD_16(PTR, VAL) \
donatien	0:632c9925f013	170	*(PTR)++ = (u8_t)((VAL) / 256); \
donatien	0:632c9925f013	171	*(PTR)++ = (u8_t)((VAL) % 256)
donatien	0:632c9925f013	172
donatien	0:632c9925f013	173	/* Add a complete PPPoE header to the buffer pointed to by PTR */
donatien	0:632c9925f013	174	#define PPPOE_ADD_HEADER(PTR, CODE, SESS, LEN) \
donatien	0:632c9925f013	175	*(PTR)++ = PPPOE_VERTYPE; \
donatien	0:632c9925f013	176	*(PTR)++ = (CODE); \
donatien	0:632c9925f013	177	PPPOE_ADD_16(PTR, SESS); \
donatien	0:632c9925f013	178	PPPOE_ADD_16(PTR, LEN)
donatien	0:632c9925f013	179
donatien	0:632c9925f013	180	#define PPPOE_DISC_TIMEOUT (51000) / base for quick timeout calculation */
donatien	0:632c9925f013	181	#define PPPOE_SLOW_RETRY (601000) / persistent retry interval */
donatien	0:632c9925f013	182	#define PPPOE_DISC_MAXPADI 4 /* retry PADI four times (quickly) */
donatien	0:632c9925f013	183	#define PPPOE_DISC_MAXPADR 2 /* retry PADR twice */
donatien	0:632c9925f013	184
donatien	0:632c9925f013	185	#ifdef PPPOE_SERVER
donatien	0:632c9925f013	186	#error "PPPOE_SERVER is not yet supported under lwIP!"
donatien	0:632c9925f013	187	/* from if_spppsubr.c */
donatien	0:632c9925f013	188	#define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
donatien	0:632c9925f013	189	#endif
donatien	0:632c9925f013	190
donatien	0:632c9925f013	191	struct pppoe_softc {
donatien	0:632c9925f013	192	LIST_ENTRY(pppoe_softc) sc_list;
donatien	0:632c9925f013	193	struct netif sc_ethif; / ethernet interface we are using */
donatien	0:632c9925f013	194	int sc_pd; /* ppp unit number */
donatien	0:632c9925f013	195	void (*sc_linkStatusCB)(int pd, int up);
donatien	0:632c9925f013	196
donatien	0:632c9925f013	197	int sc_state; /* discovery phase or session connected */
donatien	0:632c9925f013	198	struct eth_addr sc_dest; /* hardware address of concentrator */
donatien	0:632c9925f013	199	u16_t sc_session; /* PPPoE session id */
donatien	0:632c9925f013	200
donatien	0:632c9925f013	201	char sc_service_name; / if != NULL: requested name of service */
donatien	0:632c9925f013	202	char sc_concentrator_name; / if != NULL: requested concentrator id */
donatien	0:632c9925f013	203	u8_t sc_ac_cookie; / content of AC cookie we must echo back */
donatien	0:632c9925f013	204	size_t sc_ac_cookie_len; /* length of cookie data */
donatien	0:632c9925f013	205	#ifdef PPPOE_SERVER
donatien	0:632c9925f013	206	u8_t sc_hunique; / content of host unique we must echo back */
donatien	0:632c9925f013	207	size_t sc_hunique_len; /* length of host unique */
donatien	0:632c9925f013	208	#endif
donatien	0:632c9925f013	209	int sc_padi_retried; /* number of PADI retries already done */
donatien	0:632c9925f013	210	int sc_padr_retried; /* number of PADR retries already done */
donatien	0:632c9925f013	211	};
donatien	0:632c9925f013	212
donatien	0:632c9925f013	213	/* input routines */
donatien	0:632c9925f013	214	static void pppoe_dispatch_disc_pkt(struct netif , struct pbuf );
donatien	0:632c9925f013	215
donatien	0:632c9925f013	216	/* management routines */
donatien	0:632c9925f013	217	static int pppoe_do_disconnect(struct pppoe_softc *);
donatien	0:632c9925f013	218	static void pppoe_abort_connect(struct pppoe_softc *);
donatien	0:632c9925f013	219	static void pppoe_clear_softc(struct pppoe_softc , const char );
donatien	0:632c9925f013	220
donatien	0:632c9925f013	221	/* internal timeout handling */
donatien	0:632c9925f013	222	static void pppoe_timeout(void *);
donatien	0:632c9925f013	223
donatien	0:632c9925f013	224	/* sending actual protocol controll packets */
donatien	0:632c9925f013	225	static err_t pppoe_send_padi(struct pppoe_softc *);
donatien	0:632c9925f013	226	static err_t pppoe_send_padr(struct pppoe_softc *);
donatien	0:632c9925f013	227	#ifdef PPPOE_SERVER
donatien	0:632c9925f013	228	static err_t pppoe_send_pado(struct pppoe_softc *);
donatien	0:632c9925f013	229	static err_t pppoe_send_pads(struct pppoe_softc *);
donatien	0:632c9925f013	230	#endif
donatien	0:632c9925f013	231	static err_t pppoe_send_padt(struct netif , u_int, const u8_t );
donatien	0:632c9925f013	232
donatien	0:632c9925f013	233	/* internal helper functions */
donatien	0:632c9925f013	234	static struct pppoe_softc * pppoe_find_softc_by_session(u_int, struct netif *);
donatien	0:632c9925f013	235	static struct pppoe_softc * pppoe_find_softc_by_hunique(u8_t , size_t, struct netif );
donatien	0:632c9925f013	236
donatien	0:632c9925f013	237	static LIST_HEAD(pppoe_softc_head, pppoe_softc) pppoe_softc_list;
donatien	0:632c9925f013	238
donatien	0:632c9925f013	239	void
donatien	0:632c9925f013	240	pppoe_init(void)
donatien	0:632c9925f013	241	{
donatien	0:632c9925f013	242	LIST_INIT(&pppoe_softc_list);
donatien	0:632c9925f013	243	}
donatien	0:632c9925f013	244
donatien	0:632c9925f013	245	err_t
donatien	0:632c9925f013	246	pppoe_create(struct netif ethif, int pd, void (linkStatusCB)(int pd, int up), struct pppoe_softc **scptr)
donatien	0:632c9925f013	247	{
donatien	0:632c9925f013	248	struct pppoe_softc *sc;
donatien	0:632c9925f013	249
donatien	0:632c9925f013	250	sc = mem_malloc(sizeof(struct pppoe_softc));
donatien	0:632c9925f013	251	if(!sc) {
donatien	0:632c9925f013	252	*scptr = NULL;
donatien	0:632c9925f013	253	return ERR_MEM;
donatien	0:632c9925f013	254	}
donatien	0:632c9925f013	255	memset(sc, 0, sizeof(struct pppoe_softc));
donatien	0:632c9925f013	256
donatien	0:632c9925f013	257	/* changed to real address later */
donatien	0:632c9925f013	258	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
donatien	0:632c9925f013	259
donatien	0:632c9925f013	260	sc->sc_pd = pd;
donatien	0:632c9925f013	261	sc->sc_linkStatusCB = linkStatusCB;
donatien	0:632c9925f013	262	sc->sc_ethif = ethif;
donatien	0:632c9925f013	263
donatien	0:632c9925f013	264	LIST_INSERT_HEAD(&pppoe_softc_list, sc, sc_list);
donatien	0:632c9925f013	265
donatien	0:632c9925f013	266	*scptr = sc;
donatien	0:632c9925f013	267
donatien	0:632c9925f013	268	return ERR_OK;
donatien	0:632c9925f013	269	}
donatien	0:632c9925f013	270
donatien	0:632c9925f013	271	err_t
donatien	0:632c9925f013	272	pppoe_destroy(struct netif *ifp)
donatien	0:632c9925f013	273	{
donatien	0:632c9925f013	274	struct pppoe_softc * sc;
donatien	0:632c9925f013	275
donatien	0:632c9925f013	276	LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
donatien	0:632c9925f013	277	if (sc->sc_ethif == ifp) {
donatien	0:632c9925f013	278	break;
donatien	0:632c9925f013	279	}
donatien	0:632c9925f013	280	}
donatien	0:632c9925f013	281
donatien	0:632c9925f013	282	if(!(sc && (sc->sc_ethif == ifp))) {
donatien	0:632c9925f013	283	return ERR_IF;
donatien	0:632c9925f013	284	}
donatien	0:632c9925f013	285
donatien	0:632c9925f013	286	sys_untimeout(pppoe_timeout, sc);
donatien	0:632c9925f013	287	LIST_REMOVE(sc, sc_list);
donatien	0:632c9925f013	288
donatien	0:632c9925f013	289	if (sc->sc_concentrator_name) {
donatien	0:632c9925f013	290	mem_free(sc->sc_concentrator_name);
donatien	0:632c9925f013	291	}
donatien	0:632c9925f013	292	if (sc->sc_service_name) {
donatien	0:632c9925f013	293	mem_free(sc->sc_service_name);
donatien	0:632c9925f013	294	}
donatien	0:632c9925f013	295	if (sc->sc_ac_cookie) {
donatien	0:632c9925f013	296	mem_free(sc->sc_ac_cookie);
donatien	0:632c9925f013	297	}
donatien	0:632c9925f013	298	mem_free(sc);
donatien	0:632c9925f013	299
donatien	0:632c9925f013	300	return ERR_OK;
donatien	0:632c9925f013	301	}
donatien	0:632c9925f013	302
donatien	0:632c9925f013	303	/*
donatien	0:632c9925f013	304	* Find the interface handling the specified session.
donatien	0:632c9925f013	305	* Note: O(number of sessions open), this is a client-side only, mean
donatien	0:632c9925f013	306	* and lean implementation, so number of open sessions typically should
donatien	0:632c9925f013	307	* be 1.
donatien	0:632c9925f013	308	*/
donatien	0:632c9925f013	309	static struct pppoe_softc *
donatien	0:632c9925f013	310	pppoe_find_softc_by_session(u_int session, struct netif *rcvif)
donatien	0:632c9925f013	311	{
donatien	0:632c9925f013	312	struct pppoe_softc *sc;
donatien	0:632c9925f013	313
donatien	0:632c9925f013	314	if (session == 0) {
donatien	0:632c9925f013	315	return NULL;
donatien	0:632c9925f013	316	}
donatien	0:632c9925f013	317
donatien	0:632c9925f013	318	LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
donatien	0:632c9925f013	319	if (sc->sc_state == PPPOE_STATE_SESSION
donatien	0:632c9925f013	320	&& sc->sc_session == session) {
donatien	0:632c9925f013	321	if (sc->sc_ethif == rcvif) {
donatien	0:632c9925f013	322	return sc;
donatien	0:632c9925f013	323	} else {
donatien	0:632c9925f013	324	return NULL;
donatien	0:632c9925f013	325	}
donatien	0:632c9925f013	326	}
donatien	0:632c9925f013	327	}
donatien	0:632c9925f013	328	return NULL;
donatien	0:632c9925f013	329	}
donatien	0:632c9925f013	330
donatien	0:632c9925f013	331	/* Check host unique token passed and return appropriate softc pointer,
donatien	0:632c9925f013	332	* or NULL if token is bogus. */
donatien	0:632c9925f013	333	static struct pppoe_softc *
donatien	0:632c9925f013	334	pppoe_find_softc_by_hunique(u8_t token, size_t len, struct netif rcvif)
donatien	0:632c9925f013	335	{
donatien	0:632c9925f013	336	struct pppoe_softc sc, t;
donatien	0:632c9925f013	337
donatien	0:632c9925f013	338	if (LIST_EMPTY(&pppoe_softc_list)) {
donatien	0:632c9925f013	339	return NULL;
donatien	0:632c9925f013	340	}
donatien	0:632c9925f013	341
donatien	0:632c9925f013	342	if (len != sizeof sc) {
donatien	0:632c9925f013	343	return NULL;
donatien	0:632c9925f013	344	}
donatien	0:632c9925f013	345	MEMCPY(&t, token, len);
donatien	0:632c9925f013	346
donatien	0:632c9925f013	347	LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
donatien	0:632c9925f013	348	if (sc == t) {
donatien	0:632c9925f013	349	break;
donatien	0:632c9925f013	350	}
donatien	0:632c9925f013	351	}
donatien	0:632c9925f013	352
donatien	0:632c9925f013	353	if (sc == NULL) {
donatien	0:632c9925f013	354	PPPDEBUG(LOG_DEBUG, ("pppoe: alien host unique tag, no session found\n"));
donatien	0:632c9925f013	355	return NULL;
donatien	0:632c9925f013	356	}
donatien	0:632c9925f013	357
donatien	0:632c9925f013	358	/* should be safe to access sc now /
donatien	0:632c9925f013	359	if (sc->sc_state < PPPOE_STATE_PADI_SENT \|\| sc->sc_state >= PPPOE_STATE_SESSION) {
donatien	0:632c9925f013	360	printf("%c%c%"U16_F": host unique tag found, but it belongs to a connection in state %d\n",
donatien	0:632c9925f013	361	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_state);
donatien	0:632c9925f013	362	return NULL;
donatien	0:632c9925f013	363	}
donatien	0:632c9925f013	364	if (sc->sc_ethif != rcvif) {
donatien	0:632c9925f013	365	printf("%c%c%"U16_F": wrong interface, not accepting host unique\n",
donatien	0:632c9925f013	366	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
donatien	0:632c9925f013	367	return NULL;
donatien	0:632c9925f013	368	}
donatien	0:632c9925f013	369	return sc;
donatien	0:632c9925f013	370	}
donatien	0:632c9925f013	371
donatien	0:632c9925f013	372	static void
donatien	0:632c9925f013	373	pppoe_linkstatus_up(struct pppoe_softc *sc)
donatien	0:632c9925f013	374	{
donatien	0:632c9925f013	375	sc->sc_linkStatusCB(sc->sc_pd, 1);
donatien	0:632c9925f013	376	}
donatien	0:632c9925f013	377
donatien	0:632c9925f013	378	/* analyze and handle a single received packet while not in session state */
donatien	0:632c9925f013	379	static void
donatien	0:632c9925f013	380	pppoe_dispatch_disc_pkt(struct netif netif, struct pbuf pb)
donatien	0:632c9925f013	381	{
donatien	0:632c9925f013	382	u16_t tag, len;
donatien	0:632c9925f013	383	u16_t session, plen;
donatien	0:632c9925f013	384	struct pppoe_softc *sc;
donatien	0:632c9925f013	385	const char *err_msg;
donatien	0:632c9925f013	386	char devname[6];
donatien	0:632c9925f013	387	char *error;
donatien	0:632c9925f013	388	u8_t *ac_cookie;
donatien	0:632c9925f013	389	u16_t ac_cookie_len;
donatien	0:632c9925f013	390	#ifdef PPPOE_SERVER
donatien	0:632c9925f013	391	u8_t *hunique;
donatien	0:632c9925f013	392	size_t hunique_len;
donatien	0:632c9925f013	393	#endif
donatien	0:632c9925f013	394	struct pppoehdr *ph;
donatien	0:632c9925f013	395	struct pppoetag pt;
donatien	0:632c9925f013	396	int off, err, errortag;
donatien	0:632c9925f013	397	struct eth_hdr *ethhdr;
donatien	0:632c9925f013	398
donatien	0:632c9925f013	399	pb = pppSingleBuf(pb);
donatien	0:632c9925f013	400
donatien	0:632c9925f013	401	strcpy(devname, "pppoe"); /* as long as we don't know which instance */
donatien	0:632c9925f013	402	err_msg = NULL;
donatien	0:632c9925f013	403	errortag = 0;
donatien	0:632c9925f013	404	if (pb->len < sizeof(*ethhdr)) {
donatien	0:632c9925f013	405	goto done;
donatien	0:632c9925f013	406	}
donatien	0:632c9925f013	407	ethhdr = (struct eth_hdr *)pb->payload;
donatien	0:632c9925f013	408	off = sizeof(*ethhdr);
donatien	0:632c9925f013	409
donatien	0:632c9925f013	410	ac_cookie = NULL;
donatien	0:632c9925f013	411	ac_cookie_len = 0;
donatien	0:632c9925f013	412	#ifdef PPPOE_SERVER
donatien	0:632c9925f013	413	hunique = NULL;
donatien	0:632c9925f013	414	hunique_len = 0;
donatien	0:632c9925f013	415	#endif
donatien	0:632c9925f013	416	session = 0;
donatien	0:632c9925f013	417	if (pb->len - off < PPPOE_HEADERLEN) {
donatien	0:632c9925f013	418	printf("pppoe: packet too short: %d\n", pb->len);
donatien	0:632c9925f013	419	goto done;
donatien	0:632c9925f013	420	}
donatien	0:632c9925f013	421
donatien	0:632c9925f013	422	ph = (struct pppoehdr *) (ethhdr + 1);
donatien	0:632c9925f013	423	if (ph->vertype != PPPOE_VERTYPE) {
donatien	0:632c9925f013	424	printf("pppoe: unknown version/type packet: 0x%x\n", ph->vertype);
donatien	0:632c9925f013	425	goto done;
donatien	0:632c9925f013	426	}
donatien	0:632c9925f013	427	session = ntohs(ph->session);
donatien	0:632c9925f013	428	plen = ntohs(ph->plen);
donatien	0:632c9925f013	429	off += sizeof(*ph);
donatien	0:632c9925f013	430
donatien	0:632c9925f013	431	if (plen + off > pb->len) {
donatien	0:632c9925f013	432	printf("pppoe: packet content does not fit: data available = %d, packet size = %u\n",
donatien	0:632c9925f013	433	pb->len - off, plen);
donatien	0:632c9925f013	434	goto done;
donatien	0:632c9925f013	435	}
donatien	0:632c9925f013	436	if(pb->tot_len == pb->len) {
donatien	0:632c9925f013	437	pb->tot_len = pb->len = (u16_t)off + plen; /* ignore trailing garbage */
donatien	0:632c9925f013	438	}
donatien	0:632c9925f013	439	tag = 0;
donatien	0:632c9925f013	440	len = 0;
donatien	0:632c9925f013	441	sc = NULL;
donatien	0:632c9925f013	442	while (off + sizeof(pt) <= pb->len) {
donatien	0:632c9925f013	443	MEMCPY(&pt, (u8_t*)pb->payload + off, sizeof(pt));
donatien	0:632c9925f013	444	tag = ntohs(pt.tag);
donatien	0:632c9925f013	445	len = ntohs(pt.len);
donatien	0:632c9925f013	446	if (off + sizeof(pt) + len > pb->len) {
donatien	0:632c9925f013	447	printf("pppoe: tag 0x%x len 0x%x is too long\n", tag, len);
donatien	0:632c9925f013	448	goto done;
donatien	0:632c9925f013	449	}
donatien	0:632c9925f013	450	switch (tag) {
donatien	0:632c9925f013	451	case PPPOE_TAG_EOL:
donatien	0:632c9925f013	452	goto breakbreak;
donatien	0:632c9925f013	453	case PPPOE_TAG_SNAME:
donatien	0:632c9925f013	454	break; /* ignored */
donatien	0:632c9925f013	455	case PPPOE_TAG_ACNAME:
donatien	0:632c9925f013	456	break; /* ignored */
donatien	0:632c9925f013	457	case PPPOE_TAG_HUNIQUE:
donatien	0:632c9925f013	458	if (sc != NULL) {
donatien	0:632c9925f013	459	break;
donatien	0:632c9925f013	460	}
donatien	0:632c9925f013	461	#ifdef PPPOE_SERVER
donatien	0:632c9925f013	462	hunique = (u8_t*)pb->payload + off + sizeof(pt);
donatien	0:632c9925f013	463	hunique_len = len;
donatien	0:632c9925f013	464	#endif
donatien	0:632c9925f013	465	sc = pppoe_find_softc_by_hunique((u8_t*)pb->payload + off + sizeof(pt), len, netif);
donatien	0:632c9925f013	466	if (sc != NULL) {
donatien	0:632c9925f013	467	snprintf(devname, sizeof(devname), "%c%c%"U16_F, sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
donatien	0:632c9925f013	468	}
donatien	0:632c9925f013	469	break;
donatien	0:632c9925f013	470	case PPPOE_TAG_ACCOOKIE:
donatien	0:632c9925f013	471	if (ac_cookie == NULL) {
donatien	0:632c9925f013	472	ac_cookie = (u8_t*)pb->payload + off + sizeof(pt);
donatien	0:632c9925f013	473	ac_cookie_len = len;
donatien	0:632c9925f013	474	}
donatien	0:632c9925f013	475	break;
donatien	0:632c9925f013	476	case PPPOE_TAG_SNAME_ERR:
donatien	0:632c9925f013	477	err_msg = "SERVICE NAME ERROR";
donatien	0:632c9925f013	478	errortag = 1;
donatien	0:632c9925f013	479	break;
donatien	0:632c9925f013	480	case PPPOE_TAG_ACSYS_ERR:
donatien	0:632c9925f013	481	err_msg = "AC SYSTEM ERROR";
donatien	0:632c9925f013	482	errortag = 1;
donatien	0:632c9925f013	483	break;
donatien	0:632c9925f013	484	case PPPOE_TAG_GENERIC_ERR:
donatien	0:632c9925f013	485	err_msg = "GENERIC ERROR";
donatien	0:632c9925f013	486	errortag = 1;
donatien	0:632c9925f013	487	break;
donatien	0:632c9925f013	488	}
donatien	0:632c9925f013	489	if (err_msg) {
donatien	0:632c9925f013	490	error = NULL;
donatien	0:632c9925f013	491	if (errortag && len) {
donatien	0:632c9925f013	492	error = mem_malloc(len+1);
donatien	0:632c9925f013	493	if (error) {
donatien	0:632c9925f013	494	strncpy(error, (char*)pb->payload + off + sizeof(pt), len);
donatien	0:632c9925f013	495	error[len-1] = '\0';
donatien	0:632c9925f013	496	}
donatien	0:632c9925f013	497	}
donatien	0:632c9925f013	498	if (error) {
donatien	0:632c9925f013	499	printf("%s: %s: %s\n", devname, err_msg, error);
donatien	0:632c9925f013	500	mem_free(error);
donatien	0:632c9925f013	501	} else {
donatien	0:632c9925f013	502	printf("%s: %s\n", devname, err_msg);
donatien	0:632c9925f013	503	}
donatien	0:632c9925f013	504	if (errortag) {
donatien	0:632c9925f013	505	goto done;
donatien	0:632c9925f013	506	}
donatien	0:632c9925f013	507	}
donatien	0:632c9925f013	508	off += sizeof(pt) + len;
donatien	0:632c9925f013	509	}
donatien	0:632c9925f013	510
donatien	0:632c9925f013	511	breakbreak:;
donatien	0:632c9925f013	512	switch (ph->code) {
donatien	0:632c9925f013	513	case PPPOE_CODE_PADI:
donatien	0:632c9925f013	514	#ifdef PPPOE_SERVER
donatien	0:632c9925f013	515	/*
donatien	0:632c9925f013	516	* got service name, concentrator name, and/or host unique.
donatien	0:632c9925f013	517	* ignore if we have no interfaces with IFF_PASSIVE\|IFF_UP.
donatien	0:632c9925f013	518	*/
donatien	0:632c9925f013	519	if (LIST_EMPTY(&pppoe_softc_list)) {
donatien	0:632c9925f013	520	goto done;
donatien	0:632c9925f013	521	}
donatien	0:632c9925f013	522	LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
donatien	0:632c9925f013	523	if (!(sc->sc_sppp.pp_if.if_flags & IFF_UP)) {
donatien	0:632c9925f013	524	continue;
donatien	0:632c9925f013	525	}
donatien	0:632c9925f013	526	if (!(sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
donatien	0:632c9925f013	527	continue;
donatien	0:632c9925f013	528	}
donatien	0:632c9925f013	529	if (sc->sc_state == PPPOE_STATE_INITIAL) {
donatien	0:632c9925f013	530	break;
donatien	0:632c9925f013	531	}
donatien	0:632c9925f013	532	}
donatien	0:632c9925f013	533	if (sc == NULL) {
donatien	0:632c9925f013	534	/* printf("pppoe: free passive interface is not found\n"); */
donatien	0:632c9925f013	535	goto done;
donatien	0:632c9925f013	536	}
donatien	0:632c9925f013	537	if (hunique) {
donatien	0:632c9925f013	538	if (sc->sc_hunique) {
donatien	0:632c9925f013	539	mem_free(sc->sc_hunique);
donatien	0:632c9925f013	540	}
donatien	0:632c9925f013	541	sc->sc_hunique = mem_malloc(hunique_len);
donatien	0:632c9925f013	542	if (sc->sc_hunique == NULL) {
donatien	0:632c9925f013	543	goto done;
donatien	0:632c9925f013	544	}
donatien	0:632c9925f013	545	sc->sc_hunique_len = hunique_len;
donatien	0:632c9925f013	546	MEMCPY(sc->sc_hunique, hunique, hunique_len);
donatien	0:632c9925f013	547	}
donatien	0:632c9925f013	548	MEMCPY(&sc->sc_dest, eh->ether_shost, sizeof sc->sc_dest);
donatien	0:632c9925f013	549	sc->sc_state = PPPOE_STATE_PADO_SENT;
donatien	0:632c9925f013	550	pppoe_send_pado(sc);
donatien	0:632c9925f013	551	break;
donatien	0:632c9925f013	552	#endif /* PPPOE_SERVER */
donatien	0:632c9925f013	553	case PPPOE_CODE_PADR:
donatien	0:632c9925f013	554	#ifdef PPPOE_SERVER
donatien	0:632c9925f013	555	/*
donatien	0:632c9925f013	556	* get sc from ac_cookie if IFF_PASSIVE
donatien	0:632c9925f013	557	*/
donatien	0:632c9925f013	558	if (ac_cookie == NULL) {
donatien	0:632c9925f013	559	/* be quiet if there is not a single pppoe instance */
donatien	0:632c9925f013	560	printf("pppoe: received PADR but not includes ac_cookie\n");
donatien	0:632c9925f013	561	goto done;
donatien	0:632c9925f013	562	}
donatien	0:632c9925f013	563	sc = pppoe_find_softc_by_hunique(ac_cookie, ac_cookie_len, netif);
donatien	0:632c9925f013	564	if (sc == NULL) {
donatien	0:632c9925f013	565	/* be quiet if there is not a single pppoe instance */
donatien	0:632c9925f013	566	if (!LIST_EMPTY(&pppoe_softc_list)) {
donatien	0:632c9925f013	567	printf("pppoe: received PADR but could not find request for it\n");
donatien	0:632c9925f013	568	}
donatien	0:632c9925f013	569	goto done;
donatien	0:632c9925f013	570	}
donatien	0:632c9925f013	571	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
donatien	0:632c9925f013	572	printf("%c%c%"U16_F": received unexpected PADR\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
donatien	0:632c9925f013	573	goto done;
donatien	0:632c9925f013	574	}
donatien	0:632c9925f013	575	if (hunique) {
donatien	0:632c9925f013	576	if (sc->sc_hunique) {
donatien	0:632c9925f013	577	mem_free(sc->sc_hunique);
donatien	0:632c9925f013	578	}
donatien	0:632c9925f013	579	sc->sc_hunique = mem_malloc(hunique_len);
donatien	0:632c9925f013	580	if (sc->sc_hunique == NULL) {
donatien	0:632c9925f013	581	goto done;
donatien	0:632c9925f013	582	}
donatien	0:632c9925f013	583	sc->sc_hunique_len = hunique_len;
donatien	0:632c9925f013	584	MEMCPY(sc->sc_hunique, hunique, hunique_len);
donatien	0:632c9925f013	585	}
donatien	0:632c9925f013	586	pppoe_send_pads(sc);
donatien	0:632c9925f013	587	sc->sc_state = PPPOE_STATE_SESSION;
donatien	0:632c9925f013	588	pppoe_linkstatus_up(sc); /* notify upper layers */
donatien	0:632c9925f013	589	break;
donatien	0:632c9925f013	590	#else
donatien	0:632c9925f013	591	/* ignore, we are no access concentrator */
donatien	0:632c9925f013	592	goto done;
donatien	0:632c9925f013	593	#endif /* PPPOE_SERVER */
donatien	0:632c9925f013	594	case PPPOE_CODE_PADO:
donatien	0:632c9925f013	595	if (sc == NULL) {
donatien	0:632c9925f013	596	/* be quiet if there is not a single pppoe instance */
donatien	0:632c9925f013	597	if (!LIST_EMPTY(&pppoe_softc_list)) {
donatien	0:632c9925f013	598	printf("pppoe: received PADO but could not find request for it\n");
donatien	0:632c9925f013	599	}
donatien	0:632c9925f013	600	goto done;
donatien	0:632c9925f013	601	}
donatien	0:632c9925f013	602	if (sc->sc_state != PPPOE_STATE_PADI_SENT) {
donatien	0:632c9925f013	603	printf("%c%c%"U16_F": received unexpected PADO\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
donatien	0:632c9925f013	604	goto done;
donatien	0:632c9925f013	605	}
donatien	0:632c9925f013	606	if (ac_cookie) {
donatien	0:632c9925f013	607	if (sc->sc_ac_cookie) {
donatien	0:632c9925f013	608	mem_free(sc->sc_ac_cookie);
donatien	0:632c9925f013	609	}
donatien	0:632c9925f013	610	sc->sc_ac_cookie = mem_malloc(ac_cookie_len);
donatien	0:632c9925f013	611	if (sc->sc_ac_cookie == NULL) {
donatien	0:632c9925f013	612	goto done;
donatien	0:632c9925f013	613	}
donatien	0:632c9925f013	614	sc->sc_ac_cookie_len = ac_cookie_len;
donatien	0:632c9925f013	615	MEMCPY(sc->sc_ac_cookie, ac_cookie, ac_cookie_len);
donatien	0:632c9925f013	616	}
donatien	0:632c9925f013	617	MEMCPY(&sc->sc_dest, ethhdr->src.addr, sizeof(sc->sc_dest.addr));
donatien	0:632c9925f013	618	sys_untimeout(pppoe_timeout, sc);
donatien	0:632c9925f013	619	sc->sc_padr_retried = 0;
donatien	0:632c9925f013	620	sc->sc_state = PPPOE_STATE_PADR_SENT;
donatien	0:632c9925f013	621	if ((err = pppoe_send_padr(sc)) != 0) {
donatien	0:632c9925f013	622	PPPDEBUG(LOG_DEBUG, ("pppoe: %c%c%"U16_F": failed to send PADR, error=%d\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, err));
donatien	0:632c9925f013	623	}
donatien	0:632c9925f013	624	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
donatien	0:632c9925f013	625	break;
donatien	0:632c9925f013	626	case PPPOE_CODE_PADS:
donatien	0:632c9925f013	627	if (sc == NULL) {
donatien	0:632c9925f013	628	goto done;
donatien	0:632c9925f013	629	}
donatien	0:632c9925f013	630	sc->sc_session = session;
donatien	0:632c9925f013	631	sys_untimeout(pppoe_timeout, sc);
donatien	0:632c9925f013	632	PPPDEBUG(LOG_DEBUG, ("pppoe: %c%c%"U16_F": session 0x%x connected\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, session));
donatien	0:632c9925f013	633	sc->sc_state = PPPOE_STATE_SESSION;
donatien	0:632c9925f013	634	pppoe_linkstatus_up(sc); /* notify upper layers */
donatien	0:632c9925f013	635	break;
donatien	0:632c9925f013	636	case PPPOE_CODE_PADT:
donatien	0:632c9925f013	637	if (sc == NULL) {
donatien	0:632c9925f013	638	goto done;
donatien	0:632c9925f013	639	}
donatien	0:632c9925f013	640	pppoe_clear_softc(sc, "received PADT");
donatien	0:632c9925f013	641	break;
donatien	0:632c9925f013	642	default:
donatien	0:632c9925f013	643	if(sc) {
donatien	0:632c9925f013	644	printf("%c%c%"U16_F": unknown code (0x%"X16_F") session = 0x%"X16_F"\n",
donatien	0:632c9925f013	645	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
donatien	0:632c9925f013	646	(u16_t)ph->code, session);
donatien	0:632c9925f013	647	} else {
donatien	0:632c9925f013	648	printf("pppoe: unknown code (0x%"X16_F") session = 0x%"X16_F"\n", (u16_t)ph->code, session);
donatien	0:632c9925f013	649	}
donatien	0:632c9925f013	650	break;
donatien	0:632c9925f013	651	}
donatien	0:632c9925f013	652
donatien	0:632c9925f013	653	done:
donatien	0:632c9925f013	654	pbuf_free(pb);
donatien	0:632c9925f013	655	return;
donatien	0:632c9925f013	656	}
donatien	0:632c9925f013	657
donatien	0:632c9925f013	658	void
donatien	0:632c9925f013	659	pppoe_disc_input(struct netif netif, struct pbuf p)
donatien	0:632c9925f013	660	{
donatien	0:632c9925f013	661	/* avoid error messages if there is not a single pppoe instance */
donatien	0:632c9925f013	662	if (!LIST_EMPTY(&pppoe_softc_list)) {
donatien	0:632c9925f013	663	pppoe_dispatch_disc_pkt(netif, p);
donatien	0:632c9925f013	664	} else {
donatien	0:632c9925f013	665	pbuf_free(p);
donatien	0:632c9925f013	666	}
donatien	0:632c9925f013	667	}
donatien	0:632c9925f013	668
donatien	0:632c9925f013	669	void
donatien	0:632c9925f013	670	pppoe_data_input(struct netif netif, struct pbuf pb)
donatien	0:632c9925f013	671	{
donatien	0:632c9925f013	672	u16_t session, plen;
donatien	0:632c9925f013	673	struct pppoe_softc *sc;
donatien	0:632c9925f013	674	struct pppoehdr *ph;
donatien	0:632c9925f013	675	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
donatien	0:632c9925f013	676	u8_t shost[ETHER_ADDR_LEN];
donatien	0:632c9925f013	677	#endif
donatien	0:632c9925f013	678
donatien	0:632c9925f013	679	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
donatien	0:632c9925f013	680	MEMCPY(shost, ((struct eth_hdr *)pb->payload)->src.addr, sizeof(shost));
donatien	0:632c9925f013	681	#endif
donatien	0:632c9925f013	682	if (pbuf_header(pb, -(int)sizeof(struct eth_hdr)) != 0) {
donatien	0:632c9925f013	683	/* bail out */
donatien	0:632c9925f013	684	PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header failed\n"));
donatien	0:632c9925f013	685	LINK_STATS_INC(link.lenerr);
donatien	0:632c9925f013	686	goto drop;
donatien	0:632c9925f013	687	}
donatien	0:632c9925f013	688
donatien	0:632c9925f013	689	pb = pppSingleBuf (pb);
donatien	0:632c9925f013	690
donatien	0:632c9925f013	691	if (pb->len <= PPPOE_HEADERLEN) {
donatien	0:632c9925f013	692	printf("pppoe (data): dropping too short packet: %d bytes\n", pb->len);
donatien	0:632c9925f013	693	goto drop;
donatien	0:632c9925f013	694	}
donatien	0:632c9925f013	695
donatien	0:632c9925f013	696	if (pb->len < sizeof(*ph)) {
donatien	0:632c9925f013	697	printf("pppoe_data_input: could not get PPPoE header\n");
donatien	0:632c9925f013	698	goto drop;
donatien	0:632c9925f013	699	}
donatien	0:632c9925f013	700	ph = (struct pppoehdr *)pb->payload;
donatien	0:632c9925f013	701
donatien	0:632c9925f013	702	if (ph->vertype != PPPOE_VERTYPE) {
donatien	0:632c9925f013	703	printf("pppoe (data): unknown version/type packet: 0x%x\n", ph->vertype);
donatien	0:632c9925f013	704	goto drop;
donatien	0:632c9925f013	705	}
donatien	0:632c9925f013	706	if (ph->code != 0) {
donatien	0:632c9925f013	707	goto drop;
donatien	0:632c9925f013	708	}
donatien	0:632c9925f013	709
donatien	0:632c9925f013	710	session = ntohs(ph->session);
donatien	0:632c9925f013	711	sc = pppoe_find_softc_by_session(session, netif);
donatien	0:632c9925f013	712	if (sc == NULL) {
donatien	0:632c9925f013	713	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
donatien	0:632c9925f013	714	printf("pppoe: input for unknown session 0x%x, sending PADT\n", session);
donatien	0:632c9925f013	715	pppoe_send_padt(netif, session, shost);
donatien	0:632c9925f013	716	#endif
donatien	0:632c9925f013	717	goto drop;
donatien	0:632c9925f013	718	}
donatien	0:632c9925f013	719
donatien	0:632c9925f013	720	plen = ntohs(ph->plen);
donatien	0:632c9925f013	721
donatien	0:632c9925f013	722	if (pbuf_header(pb, -(int)(PPPOE_HEADERLEN)) != 0) {
donatien	0:632c9925f013	723	/* bail out */
donatien	0:632c9925f013	724	PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header PPPOE_HEADERLEN failed\n"));
donatien	0:632c9925f013	725	LINK_STATS_INC(link.lenerr);
donatien	0:632c9925f013	726	goto drop;
donatien	0:632c9925f013	727	}
donatien	0:632c9925f013	728
donatien	0:632c9925f013	729	PPPDEBUG(LOG_DEBUG, ("pppoe_data_input: %c%c%"U16_F": pkthdr.len=%d, pppoe.len=%d\n",
donatien	0:632c9925f013	730	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
donatien	0:632c9925f013	731	pb->len, plen));
donatien	0:632c9925f013	732
donatien	0:632c9925f013	733	if (pb->len < plen) {
donatien	0:632c9925f013	734	goto drop;
donatien	0:632c9925f013	735	}
donatien	0:632c9925f013	736
donatien	0:632c9925f013	737	pppInProcOverEthernet(sc->sc_pd, pb);
donatien	0:632c9925f013	738
donatien	0:632c9925f013	739	return;
donatien	0:632c9925f013	740
donatien	0:632c9925f013	741	drop:
donatien	0:632c9925f013	742	pbuf_free(pb);
donatien	0:632c9925f013	743	}
donatien	0:632c9925f013	744
donatien	0:632c9925f013	745	static err_t
donatien	0:632c9925f013	746	pppoe_output(struct pppoe_softc sc, struct pbuf pb)
donatien	0:632c9925f013	747	{
donatien	0:632c9925f013	748	struct eth_hdr *ethhdr;
donatien	0:632c9925f013	749	u16_t etype;
donatien	0:632c9925f013	750	err_t res;
donatien	0:632c9925f013	751
donatien	0:632c9925f013	752	if (!sc->sc_ethif) {
donatien	0:632c9925f013	753	pbuf_free(pb);
donatien	0:632c9925f013	754	return ERR_IF;
donatien	0:632c9925f013	755	}
donatien	0:632c9925f013	756
donatien	0:632c9925f013	757	ethhdr = (struct eth_hdr *)pb->payload;
donatien	0:632c9925f013	758	etype = sc->sc_state == PPPOE_STATE_SESSION ? ETHTYPE_PPPOE : ETHTYPE_PPPOEDISC;
donatien	0:632c9925f013	759	ethhdr->type = htons(etype);
donatien	0:632c9925f013	760	MEMCPY(ethhdr->dest.addr, sc->sc_dest.addr, sizeof(ethhdr->dest.addr));
donatien	0:632c9925f013	761	MEMCPY(ethhdr->src.addr, ((struct eth_addr *)sc->sc_ethif->hwaddr)->addr, sizeof(ethhdr->src.addr));
donatien	0:632c9925f013	762
donatien	0:632c9925f013	763	PPPDEBUG(LOG_DEBUG, ("pppoe: %c%c%"U16_F" (%x) state=%d, session=0x%x output -> %02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F", len=%d\n",
donatien	0:632c9925f013	764	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, etype,
donatien	0:632c9925f013	765	sc->sc_state, sc->sc_session,
donatien	0:632c9925f013	766	sc->sc_dest.addr[0], sc->sc_dest.addr[1], sc->sc_dest.addr[2], sc->sc_dest.addr[3], sc->sc_dest.addr[4], sc->sc_dest.addr[5],
donatien	0:632c9925f013	767	pb->tot_len));
donatien	0:632c9925f013	768
donatien	0:632c9925f013	769	res = sc->sc_ethif->linkoutput(sc->sc_ethif, pb);
donatien	0:632c9925f013	770
donatien	0:632c9925f013	771	pbuf_free(pb);
donatien	0:632c9925f013	772
donatien	0:632c9925f013	773	return res;
donatien	0:632c9925f013	774	}
donatien	0:632c9925f013	775
donatien	0:632c9925f013	776	static err_t
donatien	0:632c9925f013	777	pppoe_send_padi(struct pppoe_softc *sc)
donatien	0:632c9925f013	778	{
donatien	0:632c9925f013	779	struct pbuf *pb;
donatien	0:632c9925f013	780	u8_t *p;
donatien	0:632c9925f013	781	int len, l1 = 0, l2 = 0; /* XXX: gcc */
donatien	0:632c9925f013	782
donatien	0:632c9925f013	783	if (sc->sc_state >PPPOE_STATE_PADI_SENT) {
donatien	0:632c9925f013	784	PPPDEBUG(LOG_ERR, ("ERROR: pppoe_send_padi in state %d", sc->sc_state));
donatien	0:632c9925f013	785	}
donatien	0:632c9925f013	786
donatien	0:632c9925f013	787	/* calculate length of frame (excluding ethernet header + pppoe header) */
donatien	0:632c9925f013	788	len = 2 + 2 + 2 + 2 + sizeof sc; /* service name tag is required, host unique is send too */
donatien	0:632c9925f013	789	if (sc->sc_service_name != NULL) {
donatien	0:632c9925f013	790	l1 = (int)strlen(sc->sc_service_name);
donatien	0:632c9925f013	791	len += l1;
donatien	0:632c9925f013	792	}
donatien	0:632c9925f013	793	if (sc->sc_concentrator_name != NULL) {
donatien	0:632c9925f013	794	l2 = (int)strlen(sc->sc_concentrator_name);
donatien	0:632c9925f013	795	len += 2 + 2 + l2;
donatien	0:632c9925f013	796	}
donatien	0:632c9925f013	797	LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
donatien	0:632c9925f013	798	sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
donatien	0:632c9925f013	799
donatien	0:632c9925f013	800	/* allocate a buffer */
donatien	0:632c9925f013	801	pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
donatien	0:632c9925f013	802	if (!pb) {
donatien	0:632c9925f013	803	return ERR_MEM;
donatien	0:632c9925f013	804	}
donatien	0:632c9925f013	805	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
donatien	0:632c9925f013	806
donatien	0:632c9925f013	807	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
donatien	0:632c9925f013	808	/* fill in pkt */
donatien	0:632c9925f013	809	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADI, 0, (u16_t)len);
donatien	0:632c9925f013	810	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
donatien	0:632c9925f013	811	if (sc->sc_service_name != NULL) {
donatien	0:632c9925f013	812	PPPOE_ADD_16(p, l1);
donatien	0:632c9925f013	813	MEMCPY(p, sc->sc_service_name, l1);
donatien	0:632c9925f013	814	p += l1;
donatien	0:632c9925f013	815	} else {
donatien	0:632c9925f013	816	PPPOE_ADD_16(p, 0);
donatien	0:632c9925f013	817	}
donatien	0:632c9925f013	818	if (sc->sc_concentrator_name != NULL) {
donatien	0:632c9925f013	819	PPPOE_ADD_16(p, PPPOE_TAG_ACNAME);
donatien	0:632c9925f013	820	PPPOE_ADD_16(p, l2);
donatien	0:632c9925f013	821	MEMCPY(p, sc->sc_concentrator_name, l2);
donatien	0:632c9925f013	822	p += l2;
donatien	0:632c9925f013	823	}
donatien	0:632c9925f013	824	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
donatien	0:632c9925f013	825	PPPOE_ADD_16(p, sizeof(sc));
donatien	0:632c9925f013	826	MEMCPY(p, &sc, sizeof sc);
donatien	0:632c9925f013	827
donatien	0:632c9925f013	828	/* send pkt */
donatien	0:632c9925f013	829	return pppoe_output(sc, pb);
donatien	0:632c9925f013	830	}
donatien	0:632c9925f013	831
donatien	0:632c9925f013	832	static void
donatien	0:632c9925f013	833	pppoe_timeout(void *arg)
donatien	0:632c9925f013	834	{
donatien	0:632c9925f013	835	int retry_wait, err;
donatien	0:632c9925f013	836	struct pppoe_softc sc = (struct pppoe_softc)arg;
donatien	0:632c9925f013	837
donatien	0:632c9925f013	838	PPPDEBUG(LOG_DEBUG, ("pppoe: %c%c%"U16_F": timeout\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
donatien	0:632c9925f013	839
donatien	0:632c9925f013	840	switch (sc->sc_state) {
donatien	0:632c9925f013	841	case PPPOE_STATE_PADI_SENT:
donatien	0:632c9925f013	842	/*
donatien	0:632c9925f013	843	* We have two basic ways of retrying:
donatien	0:632c9925f013	844	* - Quick retry mode: try a few times in short sequence
donatien	0:632c9925f013	845	* - Slow retry mode: we already had a connection successfully
donatien	0:632c9925f013	846	* established and will try infinitely (without user
donatien	0:632c9925f013	847	* intervention)
donatien	0:632c9925f013	848	* We only enter slow retry mode if IFF_LINK1 (aka autodial)
donatien	0:632c9925f013	849	* is not set.
donatien	0:632c9925f013	850	*/
donatien	0:632c9925f013	851
donatien	0:632c9925f013	852	/* initialize for quick retry mode */
donatien	0:632c9925f013	853	retry_wait = PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried);
donatien	0:632c9925f013	854
donatien	0:632c9925f013	855	sc->sc_padi_retried++;
donatien	0:632c9925f013	856	if (sc->sc_padi_retried >= PPPOE_DISC_MAXPADI) {
donatien	0:632c9925f013	857	#if 0
donatien	0:632c9925f013	858	if ((sc->sc_sppp.pp_if.if_flags & IFF_LINK1) == 0) {
donatien	0:632c9925f013	859	/* slow retry mode */
donatien	0:632c9925f013	860	retry_wait = PPPOE_SLOW_RETRY;
donatien	0:632c9925f013	861	} else
donatien	0:632c9925f013	862	#endif
donatien	0:632c9925f013	863	{
donatien	0:632c9925f013	864	pppoe_abort_connect(sc);
donatien	0:632c9925f013	865	return;
donatien	0:632c9925f013	866	}
donatien	0:632c9925f013	867	}
donatien	0:632c9925f013	868	if ((err = pppoe_send_padi(sc)) != 0) {
donatien	0:632c9925f013	869	sc->sc_padi_retried--;
donatien	0:632c9925f013	870	PPPDEBUG(LOG_DEBUG, ("pppoe: %c%c%"U16_F": failed to transmit PADI, error=%d\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, err));
donatien	0:632c9925f013	871	}
donatien	0:632c9925f013	872	sys_timeout(retry_wait, pppoe_timeout, sc);
donatien	0:632c9925f013	873	break;
donatien	0:632c9925f013	874
donatien	0:632c9925f013	875	case PPPOE_STATE_PADR_SENT:
donatien	0:632c9925f013	876	sc->sc_padr_retried++;
donatien	0:632c9925f013	877	if (sc->sc_padr_retried >= PPPOE_DISC_MAXPADR) {
donatien	0:632c9925f013	878	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
donatien	0:632c9925f013	879	sc->sc_state = PPPOE_STATE_PADI_SENT;
donatien	0:632c9925f013	880	sc->sc_padr_retried = 0;
donatien	0:632c9925f013	881	if ((err = pppoe_send_padi(sc)) != 0) {
donatien	0:632c9925f013	882	PPPDEBUG(LOG_DEBUG, ("pppoe: %c%c%"U16_F": failed to send PADI, error=%d\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, err));
donatien	0:632c9925f013	883	}
donatien	0:632c9925f013	884	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried), pppoe_timeout, sc);
donatien	0:632c9925f013	885	return;
donatien	0:632c9925f013	886	}
donatien	0:632c9925f013	887	if ((err = pppoe_send_padr(sc)) != 0) {
donatien	0:632c9925f013	888	sc->sc_padr_retried--;
donatien	0:632c9925f013	889	PPPDEBUG(LOG_DEBUG, ("pppoe: %c%c%"U16_F": failed to send PADR, error=%d\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, err));
donatien	0:632c9925f013	890	}
donatien	0:632c9925f013	891	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
donatien	0:632c9925f013	892	break;
donatien	0:632c9925f013	893	case PPPOE_STATE_CLOSING:
donatien	0:632c9925f013	894	pppoe_do_disconnect(sc);
donatien	0:632c9925f013	895	break;
donatien	0:632c9925f013	896	default:
donatien	0:632c9925f013	897	return; /* all done, work in peace */
donatien	0:632c9925f013	898	}
donatien	0:632c9925f013	899	}
donatien	0:632c9925f013	900
donatien	0:632c9925f013	901	/* Start a connection (i.e. initiate discovery phase) */
donatien	0:632c9925f013	902	int
donatien	0:632c9925f013	903	pppoe_connect(struct pppoe_softc *sc)
donatien	0:632c9925f013	904	{
donatien	0:632c9925f013	905	int err;
donatien	0:632c9925f013	906
donatien	0:632c9925f013	907	if (sc->sc_state != PPPOE_STATE_INITIAL) {
donatien	0:632c9925f013	908	return EBUSY;
donatien	0:632c9925f013	909	}
donatien	0:632c9925f013	910
donatien	0:632c9925f013	911	#ifdef PPPOE_SERVER
donatien	0:632c9925f013	912	/* wait PADI if IFF_PASSIVE */
donatien	0:632c9925f013	913	if ((sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
donatien	0:632c9925f013	914	return 0;
donatien	0:632c9925f013	915	}
donatien	0:632c9925f013	916	#endif
donatien	0:632c9925f013	917	/* save state, in case we fail to send PADI */
donatien	0:632c9925f013	918	sc->sc_state = PPPOE_STATE_PADI_SENT;
donatien	0:632c9925f013	919	sc->sc_padr_retried = 0;
donatien	0:632c9925f013	920	err = pppoe_send_padi(sc);
donatien	0:632c9925f013	921	PPPDEBUG(LOG_DEBUG, ("pppoe: %c%c%"U16_F": failed to send PADI, error=%d\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, err));
donatien	0:632c9925f013	922	sys_timeout(PPPOE_DISC_TIMEOUT, pppoe_timeout, sc);
donatien	0:632c9925f013	923	return err;
donatien	0:632c9925f013	924	}
donatien	0:632c9925f013	925
donatien	0:632c9925f013	926	/* disconnect */
donatien	0:632c9925f013	927	void
donatien	0:632c9925f013	928	pppoe_disconnect(struct pppoe_softc *sc)
donatien	0:632c9925f013	929	{
donatien	0:632c9925f013	930	if (sc->sc_state < PPPOE_STATE_SESSION) {
donatien	0:632c9925f013	931	return;
donatien	0:632c9925f013	932	}
donatien	0:632c9925f013	933	/*
donatien	0:632c9925f013	934	* Do not call pppoe_disconnect here, the upper layer state
donatien	0:632c9925f013	935	* machine gets confused by this. We must return from this
donatien	0:632c9925f013	936	* function and defer disconnecting to the timeout handler.
donatien	0:632c9925f013	937	*/
donatien	0:632c9925f013	938	sc->sc_state = PPPOE_STATE_CLOSING;
donatien	0:632c9925f013	939	sys_timeout(20, pppoe_timeout, sc);
donatien	0:632c9925f013	940	}
donatien	0:632c9925f013	941
donatien	0:632c9925f013	942	static int
donatien	0:632c9925f013	943	pppoe_do_disconnect(struct pppoe_softc *sc)
donatien	0:632c9925f013	944	{
donatien	0:632c9925f013	945	int err;
donatien	0:632c9925f013	946
donatien	0:632c9925f013	947	if (sc->sc_state < PPPOE_STATE_SESSION) {
donatien	0:632c9925f013	948	err = EBUSY;
donatien	0:632c9925f013	949	} else {
donatien	0:632c9925f013	950	PPPDEBUG(LOG_DEBUG, ("pppoe: %c%c%"U16_F": disconnecting\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
donatien	0:632c9925f013	951	err = pppoe_send_padt(sc->sc_ethif, sc->sc_session, (const u8_t *)&sc->sc_dest);
donatien	0:632c9925f013	952	}
donatien	0:632c9925f013	953
donatien	0:632c9925f013	954	/* cleanup softc */
donatien	0:632c9925f013	955	sc->sc_state = PPPOE_STATE_INITIAL;
donatien	0:632c9925f013	956	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
donatien	0:632c9925f013	957	if (sc->sc_ac_cookie) {
donatien	0:632c9925f013	958	mem_free(sc->sc_ac_cookie);
donatien	0:632c9925f013	959	sc->sc_ac_cookie = NULL;
donatien	0:632c9925f013	960	}
donatien	0:632c9925f013	961	sc->sc_ac_cookie_len = 0;
donatien	0:632c9925f013	962	#ifdef PPPOE_SERVER
donatien	0:632c9925f013	963	if (sc->sc_hunique) {
donatien	0:632c9925f013	964	mem_free(sc->sc_hunique);
donatien	0:632c9925f013	965	sc->sc_hunique = NULL;
donatien	0:632c9925f013	966	}
donatien	0:632c9925f013	967	sc->sc_hunique_len = 0;
donatien	0:632c9925f013	968	#endif
donatien	0:632c9925f013	969	sc->sc_session = 0;
donatien	0:632c9925f013	970
donatien	0:632c9925f013	971	sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
donatien	0:632c9925f013	972
donatien	0:632c9925f013	973	return err;
donatien	0:632c9925f013	974	}
donatien	0:632c9925f013	975
donatien	0:632c9925f013	976	/* Connection attempt aborted */
donatien	0:632c9925f013	977	static void
donatien	0:632c9925f013	978	pppoe_abort_connect(struct pppoe_softc *sc)
donatien	0:632c9925f013	979	{
donatien	0:632c9925f013	980	printf("%c%c%"U16_F": could not establish connection\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
donatien	0:632c9925f013	981	sc->sc_state = PPPOE_STATE_CLOSING;
donatien	0:632c9925f013	982
donatien	0:632c9925f013	983	sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
donatien	0:632c9925f013	984
donatien	0:632c9925f013	985	/* clear connection state */
donatien	0:632c9925f013	986	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
donatien	0:632c9925f013	987	sc->sc_state = PPPOE_STATE_INITIAL;
donatien	0:632c9925f013	988	}
donatien	0:632c9925f013	989
donatien	0:632c9925f013	990	/* Send a PADR packet */
donatien	0:632c9925f013	991	static err_t
donatien	0:632c9925f013	992	pppoe_send_padr(struct pppoe_softc *sc)
donatien	0:632c9925f013	993	{
donatien	0:632c9925f013	994	struct pbuf *pb;
donatien	0:632c9925f013	995	u8_t *p;
donatien	0:632c9925f013	996	size_t len, l1 = 0; /* XXX: gcc */
donatien	0:632c9925f013	997
donatien	0:632c9925f013	998	if (sc->sc_state != PPPOE_STATE_PADR_SENT) {
donatien	0:632c9925f013	999	return ERR_CONN;
donatien	0:632c9925f013	1000	}
donatien	0:632c9925f013	1001
donatien	0:632c9925f013	1002	len = 2 + 2 + 2 + 2 + sizeof(sc); /* service name, host unique */
donatien	0:632c9925f013	1003	if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
donatien	0:632c9925f013	1004	l1 = strlen(sc->sc_service_name);
donatien	0:632c9925f013	1005	len += l1;
donatien	0:632c9925f013	1006	}
donatien	0:632c9925f013	1007	if (sc->sc_ac_cookie_len > 0) {
donatien	0:632c9925f013	1008	len += 2 + 2 + sc->sc_ac_cookie_len; /* AC cookie */
donatien	0:632c9925f013	1009	}
donatien	0:632c9925f013	1010	LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
donatien	0:632c9925f013	1011	sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
donatien	0:632c9925f013	1012	pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
donatien	0:632c9925f013	1013	if (!pb) {
donatien	0:632c9925f013	1014	return ERR_MEM;
donatien	0:632c9925f013	1015	}
donatien	0:632c9925f013	1016	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
donatien	0:632c9925f013	1017	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
donatien	0:632c9925f013	1018	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADR, 0, len);
donatien	0:632c9925f013	1019	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
donatien	0:632c9925f013	1020	if (sc->sc_service_name != NULL) {
donatien	0:632c9925f013	1021	PPPOE_ADD_16(p, l1);
donatien	0:632c9925f013	1022	MEMCPY(p, sc->sc_service_name, l1);
donatien	0:632c9925f013	1023	p += l1;
donatien	0:632c9925f013	1024	} else {
donatien	0:632c9925f013	1025	PPPOE_ADD_16(p, 0);
donatien	0:632c9925f013	1026	}
donatien	0:632c9925f013	1027	if (sc->sc_ac_cookie_len > 0) {
donatien	0:632c9925f013	1028	PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
donatien	0:632c9925f013	1029	PPPOE_ADD_16(p, sc->sc_ac_cookie_len);
donatien	0:632c9925f013	1030	MEMCPY(p, sc->sc_ac_cookie, sc->sc_ac_cookie_len);
donatien	0:632c9925f013	1031	p += sc->sc_ac_cookie_len;
donatien	0:632c9925f013	1032	}
donatien	0:632c9925f013	1033	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
donatien	0:632c9925f013	1034	PPPOE_ADD_16(p, sizeof(sc));
donatien	0:632c9925f013	1035	MEMCPY(p, &sc, sizeof sc);
donatien	0:632c9925f013	1036
donatien	0:632c9925f013	1037	return pppoe_output(sc, pb);
donatien	0:632c9925f013	1038	}
donatien	0:632c9925f013	1039
donatien	0:632c9925f013	1040	/* send a PADT packet */
donatien	0:632c9925f013	1041	static err_t
donatien	0:632c9925f013	1042	pppoe_send_padt(struct netif outgoing_if, u_int session, const u8_t dest)
donatien	0:632c9925f013	1043	{
donatien	0:632c9925f013	1044	struct pbuf *pb;
donatien	0:632c9925f013	1045	struct eth_hdr *ethhdr;
donatien	0:632c9925f013	1046	err_t res;
donatien	0:632c9925f013	1047	u8_t *p;
donatien	0:632c9925f013	1048
donatien	0:632c9925f013	1049	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN, PBUF_RAM);
donatien	0:632c9925f013	1050	if (!pb) {
donatien	0:632c9925f013	1051	return ERR_MEM;
donatien	0:632c9925f013	1052	}
donatien	0:632c9925f013	1053	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
donatien	0:632c9925f013	1054
donatien	0:632c9925f013	1055	ethhdr = (struct eth_hdr *)pb->payload;
donatien	0:632c9925f013	1056	ethhdr->type = htons(ETHTYPE_PPPOEDISC);
donatien	0:632c9925f013	1057	MEMCPY(ethhdr->dest.addr, dest, sizeof(ethhdr->dest.addr));
donatien	0:632c9925f013	1058	MEMCPY(ethhdr->src.addr, ((struct eth_addr *)outgoing_if->hwaddr)->addr, sizeof(ethhdr->src.addr));
donatien	0:632c9925f013	1059
donatien	0:632c9925f013	1060	p = (u8_t*)(ethhdr + 1);
donatien	0:632c9925f013	1061	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADT, session, 0);
donatien	0:632c9925f013	1062
donatien	0:632c9925f013	1063	res = outgoing_if->linkoutput(outgoing_if, pb);
donatien	0:632c9925f013	1064
donatien	0:632c9925f013	1065	pbuf_free(pb);
donatien	0:632c9925f013	1066
donatien	0:632c9925f013	1067	return res;
donatien	0:632c9925f013	1068	}
donatien	0:632c9925f013	1069
donatien	0:632c9925f013	1070	#ifdef PPPOE_SERVER
donatien	0:632c9925f013	1071	static err_t
donatien	0:632c9925f013	1072	pppoe_send_pado(struct pppoe_softc *sc)
donatien	0:632c9925f013	1073	{
donatien	0:632c9925f013	1074	struct pbuf *pb;
donatien	0:632c9925f013	1075	u8_t *p;
donatien	0:632c9925f013	1076	size_t len;
donatien	0:632c9925f013	1077
donatien	0:632c9925f013	1078	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
donatien	0:632c9925f013	1079	return ERR_CONN;
donatien	0:632c9925f013	1080	}
donatien	0:632c9925f013	1081
donatien	0:632c9925f013	1082	/* calc length */
donatien	0:632c9925f013	1083	len = 0;
donatien	0:632c9925f013	1084	/* include ac_cookie */
donatien	0:632c9925f013	1085	len += 2 + 2 + sizeof(sc);
donatien	0:632c9925f013	1086	/* include hunique */
donatien	0:632c9925f013	1087	len += 2 + 2 + sc->sc_hunique_len;
donatien	0:632c9925f013	1088	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
donatien	0:632c9925f013	1089	if (!pb) {
donatien	0:632c9925f013	1090	return ERR_MEM;
donatien	0:632c9925f013	1091	}
donatien	0:632c9925f013	1092	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
donatien	0:632c9925f013	1093	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
donatien	0:632c9925f013	1094	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADO, 0, len);
donatien	0:632c9925f013	1095	PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
donatien	0:632c9925f013	1096	PPPOE_ADD_16(p, sizeof(sc));
donatien	0:632c9925f013	1097	MEMCPY(p, &sc, sizeof(sc));
donatien	0:632c9925f013	1098	p += sizeof(sc);
donatien	0:632c9925f013	1099	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
donatien	0:632c9925f013	1100	PPPOE_ADD_16(p, sc->sc_hunique_len);
donatien	0:632c9925f013	1101	MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
donatien	0:632c9925f013	1102	return pppoe_output(sc, pb);
donatien	0:632c9925f013	1103	}
donatien	0:632c9925f013	1104
donatien	0:632c9925f013	1105	static err_t
donatien	0:632c9925f013	1106	pppoe_send_pads(struct pppoe_softc *sc)
donatien	0:632c9925f013	1107	{
donatien	0:632c9925f013	1108	struct pbuf *pb;
donatien	0:632c9925f013	1109	u8_t *p;
donatien	0:632c9925f013	1110	size_t len, l1 = 0; /* XXX: gcc */
donatien	0:632c9925f013	1111
donatien	0:632c9925f013	1112	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
donatien	0:632c9925f013	1113	return ERR_CONN;
donatien	0:632c9925f013	1114	}
donatien	0:632c9925f013	1115
donatien	0:632c9925f013	1116	sc->sc_session = mono_time.tv_sec % 0xff + 1;
donatien	0:632c9925f013	1117	/* calc length */
donatien	0:632c9925f013	1118	len = 0;
donatien	0:632c9925f013	1119	/* include hunique */
donatien	0:632c9925f013	1120	len += 2 + 2 + 2 + 2 + sc->sc_hunique_len; /* service name, host unique*/
donatien	0:632c9925f013	1121	if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
donatien	0:632c9925f013	1122	l1 = strlen(sc->sc_service_name);
donatien	0:632c9925f013	1123	len += l1;
donatien	0:632c9925f013	1124	}
donatien	0:632c9925f013	1125	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
donatien	0:632c9925f013	1126	if (!pb) {
donatien	0:632c9925f013	1127	return ERR_MEM;
donatien	0:632c9925f013	1128	}
donatien	0:632c9925f013	1129	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
donatien	0:632c9925f013	1130	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
donatien	0:632c9925f013	1131	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADS, sc->sc_session, len);
donatien	0:632c9925f013	1132	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
donatien	0:632c9925f013	1133	if (sc->sc_service_name != NULL) {
donatien	0:632c9925f013	1134	PPPOE_ADD_16(p, l1);
donatien	0:632c9925f013	1135	MEMCPY(p, sc->sc_service_name, l1);
donatien	0:632c9925f013	1136	p += l1;
donatien	0:632c9925f013	1137	} else {
donatien	0:632c9925f013	1138	PPPOE_ADD_16(p, 0);
donatien	0:632c9925f013	1139	}
donatien	0:632c9925f013	1140	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
donatien	0:632c9925f013	1141	PPPOE_ADD_16(p, sc->sc_hunique_len);
donatien	0:632c9925f013	1142	MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
donatien	0:632c9925f013	1143	return pppoe_output(sc, pb);
donatien	0:632c9925f013	1144	}
donatien	0:632c9925f013	1145	#endif
donatien	0:632c9925f013	1146
donatien	0:632c9925f013	1147	err_t
donatien	0:632c9925f013	1148	pppoe_xmit(struct pppoe_softc sc, struct pbuf pb)
donatien	0:632c9925f013	1149	{
donatien	0:632c9925f013	1150	u8_t *p;
donatien	0:632c9925f013	1151	size_t len;
donatien	0:632c9925f013	1152
donatien	0:632c9925f013	1153	/* are we ready to process data yet? */
donatien	0:632c9925f013	1154	if (sc->sc_state < PPPOE_STATE_SESSION) {
donatien	0:632c9925f013	1155	/sppp_flush(&sc->sc_sppp.pp_if);/
donatien	0:632c9925f013	1156	pbuf_free(pb);
donatien	0:632c9925f013	1157	return ERR_CONN;
donatien	0:632c9925f013	1158	}
donatien	0:632c9925f013	1159
donatien	0:632c9925f013	1160	len = pb->tot_len;
donatien	0:632c9925f013	1161
donatien	0:632c9925f013	1162	/* make room for Ethernet header - should not fail */
donatien	0:632c9925f013	1163	if (pbuf_header(pb, sizeof(struct eth_hdr) + PPPOE_HEADERLEN) != 0) {
donatien	0:632c9925f013	1164	/* bail out */
donatien	0:632c9925f013	1165	PPPDEBUG(LOG_ERR, ("pppoe: %c%c%"U16_F": pppoe_xmit: could not allocate room for header\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
donatien	0:632c9925f013	1166	LINK_STATS_INC(link.lenerr);
donatien	0:632c9925f013	1167	pbuf_free(pb);
donatien	0:632c9925f013	1168	return ERR_BUF;
donatien	0:632c9925f013	1169	}
donatien	0:632c9925f013	1170
donatien	0:632c9925f013	1171	p = (u8_t*)pb->payload + sizeof(struct eth_hdr);
donatien	0:632c9925f013	1172	PPPOE_ADD_HEADER(p, 0, sc->sc_session, len);
donatien	0:632c9925f013	1173
donatien	0:632c9925f013	1174	return pppoe_output(sc, pb);
donatien	0:632c9925f013	1175	}
donatien	0:632c9925f013	1176
donatien	0:632c9925f013	1177	#if 0 /def PFIL_HOOKS/
donatien	0:632c9925f013	1178	static int
donatien	0:632c9925f013	1179	pppoe_ifattach_hook(void arg, struct pbuf mp, struct netif ifp, int dir)
donatien	0:632c9925f013	1180	{
donatien	0:632c9925f013	1181	struct pppoe_softc *sc;
donatien	0:632c9925f013	1182	int s;
donatien	0:632c9925f013	1183
donatien	0:632c9925f013	1184	if (mp != (struct pbuf **)PFIL_IFNET_DETACH) {
donatien	0:632c9925f013	1185	return 0;
donatien	0:632c9925f013	1186	}
donatien	0:632c9925f013	1187
donatien	0:632c9925f013	1188	LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
donatien	0:632c9925f013	1189	if (sc->sc_ethif != ifp) {
donatien	0:632c9925f013	1190	continue;
donatien	0:632c9925f013	1191	}
donatien	0:632c9925f013	1192	if (sc->sc_sppp.pp_if.if_flags & IFF_UP) {
donatien	0:632c9925f013	1193	sc->sc_sppp.pp_if.if_flags &= ~(IFF_UP\|IFF_RUNNING);
donatien	0:632c9925f013	1194	printf("%c%c%"U16_F": ethernet interface detached, going down\n",
donatien	0:632c9925f013	1195	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
donatien	0:632c9925f013	1196	}
donatien	0:632c9925f013	1197	sc->sc_ethif = NULL;
donatien	0:632c9925f013	1198	pppoe_clear_softc(sc, "ethernet interface detached");
donatien	0:632c9925f013	1199	}
donatien	0:632c9925f013	1200
donatien	0:632c9925f013	1201	return 0;
donatien	0:632c9925f013	1202	}
donatien	0:632c9925f013	1203	#endif
donatien	0:632c9925f013	1204
donatien	0:632c9925f013	1205	static void
donatien	0:632c9925f013	1206	pppoe_clear_softc(struct pppoe_softc sc, const char message)
donatien	0:632c9925f013	1207	{
donatien	0:632c9925f013	1208	LWIP_UNUSED_ARG(message);
donatien	0:632c9925f013	1209
donatien	0:632c9925f013	1210	/* stop timer */
donatien	0:632c9925f013	1211	sys_untimeout(pppoe_timeout, sc);
donatien	0:632c9925f013	1212	PPPDEBUG(LOG_DEBUG, ("pppoe: %c%c%"U16_F": session 0x%x terminated, %s\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_session, message));
donatien	0:632c9925f013	1213
donatien	0:632c9925f013	1214	/* fix our state */
donatien	0:632c9925f013	1215	sc->sc_state = PPPOE_STATE_INITIAL;
donatien	0:632c9925f013	1216
donatien	0:632c9925f013	1217	/* notify upper layers */
donatien	0:632c9925f013	1218	sc->sc_linkStatusCB(sc->sc_pd, 0);
donatien	0:632c9925f013	1219
donatien	0:632c9925f013	1220	/* clean up softc */
donatien	0:632c9925f013	1221	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
donatien	0:632c9925f013	1222	if (sc->sc_ac_cookie) {
donatien	0:632c9925f013	1223	mem_free(sc->sc_ac_cookie);
donatien	0:632c9925f013	1224	sc->sc_ac_cookie = NULL;
donatien	0:632c9925f013	1225	}
donatien	0:632c9925f013	1226	sc->sc_ac_cookie_len = 0;
donatien	0:632c9925f013	1227	sc->sc_session = 0;
donatien	0:632c9925f013	1228	}
donatien	0:632c9925f013	1229
donatien	0:632c9925f013	1230	#endif /* PPPOE_SUPPORT */
donatien	0:632c9925f013	1231

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Type:	Program
Created:	11 Jun 2010
Imports:	2654
Forks:	0
Commits:	12
Dependents:	3
Dependencies:	0
Followers:	13

This repository is Public (Unlisted).

lwip/netif/ppp/ppp_oe.c@0:632c9925f013, 2010-06-11 (annotated)

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