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ZG2100 Network interface source

lwip/netif/ppp/ppp_oe.c@0:b802fc31f1db, 2010-07-09 (annotated)

Committer:: donatien
Date:: Fri Jul 09 15:37:23 2010 +0000
Revision:: 0:b802fc31f1db

Who changed what in which revision?

User	Revision	Line number	New contents of line
donatien	0:b802fc31f1db	1	/*****************************************************************************
donatien	0:b802fc31f1db	2	* ppp_oe.c - PPP Over Ethernet implementation for lwIP.
donatien	0:b802fc31f1db	3	*
donatien	0:b802fc31f1db	4	* Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc.
donatien	0:b802fc31f1db	5	*
donatien	0:b802fc31f1db	6	* The authors hereby grant permission to use, copy, modify, distribute,
donatien	0:b802fc31f1db	7	* and license this software and its documentation for any purpose, provided
donatien	0:b802fc31f1db	8	* that existing copyright notices are retained in all copies and that this
donatien	0:b802fc31f1db	9	* notice and the following disclaimer are included verbatim in any
donatien	0:b802fc31f1db	10	* distributions. No written agreement, license, or royalty fee is required
donatien	0:b802fc31f1db	11	* for any of the authorized uses.
donatien	0:b802fc31f1db	12	*
donatien	0:b802fc31f1db	13	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
donatien	0:b802fc31f1db	14	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
donatien	0:b802fc31f1db	15	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
donatien	0:b802fc31f1db	16	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
donatien	0:b802fc31f1db	17	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
donatien	0:b802fc31f1db	18	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
donatien	0:b802fc31f1db	19	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
donatien	0:b802fc31f1db	20	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
donatien	0:b802fc31f1db	21	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
donatien	0:b802fc31f1db	22	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
donatien	0:b802fc31f1db	23	*
donatien	0:b802fc31f1db	24	******************************************************************************
donatien	0:b802fc31f1db	25	* REVISION HISTORY
donatien	0:b802fc31f1db	26	*
donatien	0:b802fc31f1db	27	* 06-01-01 Marc Boucher <marc@mbsi.ca>
donatien	0:b802fc31f1db	28	* Ported to lwIP.
donatien	0:b802fc31f1db	29	*****************************************************************************/
donatien	0:b802fc31f1db	30
donatien	0:b802fc31f1db	31
donatien	0:b802fc31f1db	32
donatien	0:b802fc31f1db	33	/* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */
donatien	0:b802fc31f1db	34
donatien	0:b802fc31f1db	35	/*-
donatien	0:b802fc31f1db	36	* Copyright (c) 2002 The NetBSD Foundation, Inc.
donatien	0:b802fc31f1db	37	* All rights reserved.
donatien	0:b802fc31f1db	38	*
donatien	0:b802fc31f1db	39	* This code is derived from software contributed to The NetBSD Foundation
donatien	0:b802fc31f1db	40	* by Martin Husemann <martin@NetBSD.org>.
donatien	0:b802fc31f1db	41	*
donatien	0:b802fc31f1db	42	* Redistribution and use in source and binary forms, with or without
donatien	0:b802fc31f1db	43	* modification, are permitted provided that the following conditions
donatien	0:b802fc31f1db	44	* are met:
donatien	0:b802fc31f1db	45	* 1. Redistributions of source code must retain the above copyright
donatien	0:b802fc31f1db	46	* notice, this list of conditions and the following disclaimer.
donatien	0:b802fc31f1db	47	* 2. Redistributions in binary form must reproduce the above copyright
donatien	0:b802fc31f1db	48	* notice, this list of conditions and the following disclaimer in the
donatien	0:b802fc31f1db	49	* documentation and/or other materials provided with the distribution.
donatien	0:b802fc31f1db	50	* 3. All advertising materials mentioning features or use of this software
donatien	0:b802fc31f1db	51	* must display the following acknowledgement:
donatien	0:b802fc31f1db	52	* This product includes software developed by the NetBSD
donatien	0:b802fc31f1db	53	* Foundation, Inc. and its contributors.
donatien	0:b802fc31f1db	54	* 4. Neither the name of The NetBSD Foundation nor the names of its
donatien	0:b802fc31f1db	55	* contributors may be used to endorse or promote products derived
donatien	0:b802fc31f1db	56	* from this software without specific prior written permission.
donatien	0:b802fc31f1db	57	*
donatien	0:b802fc31f1db	58	* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
donatien	0:b802fc31f1db	59	* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
donatien	0:b802fc31f1db	60	* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
donatien	0:b802fc31f1db	61	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
donatien	0:b802fc31f1db	62	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
donatien	0:b802fc31f1db	63	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
donatien	0:b802fc31f1db	64	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
donatien	0:b802fc31f1db	65	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
donatien	0:b802fc31f1db	66	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
donatien	0:b802fc31f1db	67	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
donatien	0:b802fc31f1db	68	* POSSIBILITY OF SUCH DAMAGE.
donatien	0:b802fc31f1db	69	*/
donatien	0:b802fc31f1db	70
donatien	0:b802fc31f1db	71	#include "lwip/opt.h"
donatien	0:b802fc31f1db	72
donatien	0:b802fc31f1db	73	#if PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */
donatien	0:b802fc31f1db	74
donatien	0:b802fc31f1db	75	#include "netif/ppp_oe.h"
donatien	0:b802fc31f1db	76
donatien	0:b802fc31f1db	77	#include "ppp.h"
donatien	0:b802fc31f1db	78	#include "pppdebug.h"
donatien	0:b802fc31f1db	79
donatien	0:b802fc31f1db	80	#include "lwip/timers.h"
donatien	0:b802fc31f1db	81	#include "lwip/memp.h"
donatien	0:b802fc31f1db	82
donatien	0:b802fc31f1db	83	#include <string.h>
donatien	0:b802fc31f1db	84	#include <stdio.h>
donatien	0:b802fc31f1db	85
donatien	0:b802fc31f1db	86
donatien	0:b802fc31f1db	87	/* Add a 16 bit unsigned value to a buffer pointed to by PTR */
donatien	0:b802fc31f1db	88	#define PPPOE_ADD_16(PTR, VAL) \
donatien	0:b802fc31f1db	89	*(PTR)++ = (u8_t)((VAL) / 256); \
donatien	0:b802fc31f1db	90	*(PTR)++ = (u8_t)((VAL) % 256)
donatien	0:b802fc31f1db	91
donatien	0:b802fc31f1db	92	/* Add a complete PPPoE header to the buffer pointed to by PTR */
donatien	0:b802fc31f1db	93	#define PPPOE_ADD_HEADER(PTR, CODE, SESS, LEN) \
donatien	0:b802fc31f1db	94	*(PTR)++ = PPPOE_VERTYPE; \
donatien	0:b802fc31f1db	95	*(PTR)++ = (CODE); \
donatien	0:b802fc31f1db	96	PPPOE_ADD_16(PTR, SESS); \
donatien	0:b802fc31f1db	97	PPPOE_ADD_16(PTR, LEN)
donatien	0:b802fc31f1db	98
donatien	0:b802fc31f1db	99	#define PPPOE_DISC_TIMEOUT (51000) / base for quick timeout calculation */
donatien	0:b802fc31f1db	100	#define PPPOE_SLOW_RETRY (601000) / persistent retry interval */
donatien	0:b802fc31f1db	101	#define PPPOE_DISC_MAXPADI 4 /* retry PADI four times (quickly) */
donatien	0:b802fc31f1db	102	#define PPPOE_DISC_MAXPADR 2 /* retry PADR twice */
donatien	0:b802fc31f1db	103
donatien	0:b802fc31f1db	104	#ifdef PPPOE_SERVER
donatien	0:b802fc31f1db	105	#error "PPPOE_SERVER is not yet supported under lwIP!"
donatien	0:b802fc31f1db	106	/* from if_spppsubr.c */
donatien	0:b802fc31f1db	107	#define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
donatien	0:b802fc31f1db	108	#endif
donatien	0:b802fc31f1db	109
donatien	0:b802fc31f1db	110	#ifndef PPPOE_ERRORSTRING_LEN
donatien	0:b802fc31f1db	111	#define PPPOE_ERRORSTRING_LEN 64
donatien	0:b802fc31f1db	112	#endif
donatien	0:b802fc31f1db	113	static char pppoe_error_tmp[PPPOE_ERRORSTRING_LEN];
donatien	0:b802fc31f1db	114
donatien	0:b802fc31f1db	115
donatien	0:b802fc31f1db	116	/* input routines */
donatien	0:b802fc31f1db	117	static void pppoe_dispatch_disc_pkt(struct netif , struct pbuf );
donatien	0:b802fc31f1db	118
donatien	0:b802fc31f1db	119	/* management routines */
donatien	0:b802fc31f1db	120	static int pppoe_do_disconnect(struct pppoe_softc *);
donatien	0:b802fc31f1db	121	static void pppoe_abort_connect(struct pppoe_softc *);
donatien	0:b802fc31f1db	122	static void pppoe_clear_softc(struct pppoe_softc , const char );
donatien	0:b802fc31f1db	123
donatien	0:b802fc31f1db	124	/* internal timeout handling */
donatien	0:b802fc31f1db	125	static void pppoe_timeout(void *);
donatien	0:b802fc31f1db	126
donatien	0:b802fc31f1db	127	/* sending actual protocol controll packets */
donatien	0:b802fc31f1db	128	static err_t pppoe_send_padi(struct pppoe_softc *);
donatien	0:b802fc31f1db	129	static err_t pppoe_send_padr(struct pppoe_softc *);
donatien	0:b802fc31f1db	130	#ifdef PPPOE_SERVER
donatien	0:b802fc31f1db	131	static err_t pppoe_send_pado(struct pppoe_softc *);
donatien	0:b802fc31f1db	132	static err_t pppoe_send_pads(struct pppoe_softc *);
donatien	0:b802fc31f1db	133	#endif
donatien	0:b802fc31f1db	134	static err_t pppoe_send_padt(struct netif , u_int, const u8_t );
donatien	0:b802fc31f1db	135
donatien	0:b802fc31f1db	136	/* internal helper functions */
donatien	0:b802fc31f1db	137	static struct pppoe_softc * pppoe_find_softc_by_session(u_int, struct netif *);
donatien	0:b802fc31f1db	138	static struct pppoe_softc * pppoe_find_softc_by_hunique(u8_t , size_t, struct netif );
donatien	0:b802fc31f1db	139
donatien	0:b802fc31f1db	140	/** linked list of created pppoe interfaces */
donatien	0:b802fc31f1db	141	static struct pppoe_softc *pppoe_softc_list;
donatien	0:b802fc31f1db	142
donatien	0:b802fc31f1db	143	err_t
donatien	0:b802fc31f1db	144	pppoe_create(struct netif ethif, int pd, void (linkStatusCB)(int pd, int up), struct pppoe_softc **scptr)
donatien	0:b802fc31f1db	145	{
donatien	0:b802fc31f1db	146	struct pppoe_softc *sc;
donatien	0:b802fc31f1db	147
donatien	0:b802fc31f1db	148	sc = (struct pppoe_softc *)memp_malloc(MEMP_PPPOE_IF);
donatien	0:b802fc31f1db	149	if (sc == NULL) {
donatien	0:b802fc31f1db	150	*scptr = NULL;
donatien	0:b802fc31f1db	151	return ERR_MEM;
donatien	0:b802fc31f1db	152	}
donatien	0:b802fc31f1db	153	memset(sc, 0, sizeof(struct pppoe_softc));
donatien	0:b802fc31f1db	154
donatien	0:b802fc31f1db	155	/* changed to real address later */
donatien	0:b802fc31f1db	156	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
donatien	0:b802fc31f1db	157
donatien	0:b802fc31f1db	158	sc->sc_pd = pd;
donatien	0:b802fc31f1db	159	sc->sc_linkStatusCB = linkStatusCB;
donatien	0:b802fc31f1db	160	sc->sc_ethif = ethif;
donatien	0:b802fc31f1db	161
donatien	0:b802fc31f1db	162	/* put the new interface at the head of the list */
donatien	0:b802fc31f1db	163	sc->next = pppoe_softc_list;
donatien	0:b802fc31f1db	164	pppoe_softc_list = sc;
donatien	0:b802fc31f1db	165
donatien	0:b802fc31f1db	166	*scptr = sc;
donatien	0:b802fc31f1db	167
donatien	0:b802fc31f1db	168	return ERR_OK;
donatien	0:b802fc31f1db	169	}
donatien	0:b802fc31f1db	170
donatien	0:b802fc31f1db	171	err_t
donatien	0:b802fc31f1db	172	pppoe_destroy(struct netif *ifp)
donatien	0:b802fc31f1db	173	{
donatien	0:b802fc31f1db	174	struct pppoe_softc sc, prev = NULL;
donatien	0:b802fc31f1db	175
donatien	0:b802fc31f1db	176	for (sc = pppoe_softc_list; sc != NULL; prev = sc, sc = sc->next) {
donatien	0:b802fc31f1db	177	if (sc->sc_ethif == ifp) {
donatien	0:b802fc31f1db	178	break;
donatien	0:b802fc31f1db	179	}
donatien	0:b802fc31f1db	180	}
donatien	0:b802fc31f1db	181
donatien	0:b802fc31f1db	182	if(!(sc && (sc->sc_ethif == ifp))) {
donatien	0:b802fc31f1db	183	return ERR_IF;
donatien	0:b802fc31f1db	184	}
donatien	0:b802fc31f1db	185
donatien	0:b802fc31f1db	186	sys_untimeout(pppoe_timeout, sc);
donatien	0:b802fc31f1db	187	if (prev == NULL) {
donatien	0:b802fc31f1db	188	/* remove sc from the head of the list */
donatien	0:b802fc31f1db	189	pppoe_softc_list = sc->next;
donatien	0:b802fc31f1db	190	} else {
donatien	0:b802fc31f1db	191	/* remove sc from the list */
donatien	0:b802fc31f1db	192	prev->next = sc->next;
donatien	0:b802fc31f1db	193	}
donatien	0:b802fc31f1db	194
donatien	0:b802fc31f1db	195	#ifdef PPPOE_TODO
donatien	0:b802fc31f1db	196	if (sc->sc_concentrator_name) {
donatien	0:b802fc31f1db	197	mem_free(sc->sc_concentrator_name);
donatien	0:b802fc31f1db	198	}
donatien	0:b802fc31f1db	199	if (sc->sc_service_name) {
donatien	0:b802fc31f1db	200	mem_free(sc->sc_service_name);
donatien	0:b802fc31f1db	201	}
donatien	0:b802fc31f1db	202	#endif /* PPPOE_TODO */
donatien	0:b802fc31f1db	203	memp_free(MEMP_PPPOE_IF, sc);
donatien	0:b802fc31f1db	204
donatien	0:b802fc31f1db	205	return ERR_OK;
donatien	0:b802fc31f1db	206	}
donatien	0:b802fc31f1db	207
donatien	0:b802fc31f1db	208	/*
donatien	0:b802fc31f1db	209	* Find the interface handling the specified session.
donatien	0:b802fc31f1db	210	* Note: O(number of sessions open), this is a client-side only, mean
donatien	0:b802fc31f1db	211	* and lean implementation, so number of open sessions typically should
donatien	0:b802fc31f1db	212	* be 1.
donatien	0:b802fc31f1db	213	*/
donatien	0:b802fc31f1db	214	static struct pppoe_softc *
donatien	0:b802fc31f1db	215	pppoe_find_softc_by_session(u_int session, struct netif *rcvif)
donatien	0:b802fc31f1db	216	{
donatien	0:b802fc31f1db	217	struct pppoe_softc *sc;
donatien	0:b802fc31f1db	218
donatien	0:b802fc31f1db	219	if (session == 0) {
donatien	0:b802fc31f1db	220	return NULL;
donatien	0:b802fc31f1db	221	}
donatien	0:b802fc31f1db	222
donatien	0:b802fc31f1db	223	for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
donatien	0:b802fc31f1db	224	if (sc->sc_state == PPPOE_STATE_SESSION
donatien	0:b802fc31f1db	225	&& sc->sc_session == session) {
donatien	0:b802fc31f1db	226	if (sc->sc_ethif == rcvif) {
donatien	0:b802fc31f1db	227	return sc;
donatien	0:b802fc31f1db	228	} else {
donatien	0:b802fc31f1db	229	return NULL;
donatien	0:b802fc31f1db	230	}
donatien	0:b802fc31f1db	231	}
donatien	0:b802fc31f1db	232	}
donatien	0:b802fc31f1db	233	return NULL;
donatien	0:b802fc31f1db	234	}
donatien	0:b802fc31f1db	235
donatien	0:b802fc31f1db	236	/* Check host unique token passed and return appropriate softc pointer,
donatien	0:b802fc31f1db	237	* or NULL if token is bogus. */
donatien	0:b802fc31f1db	238	static struct pppoe_softc *
donatien	0:b802fc31f1db	239	pppoe_find_softc_by_hunique(u8_t token, size_t len, struct netif rcvif)
donatien	0:b802fc31f1db	240	{
donatien	0:b802fc31f1db	241	struct pppoe_softc sc, t;
donatien	0:b802fc31f1db	242
donatien	0:b802fc31f1db	243	if (pppoe_softc_list == NULL) {
donatien	0:b802fc31f1db	244	return NULL;
donatien	0:b802fc31f1db	245	}
donatien	0:b802fc31f1db	246
donatien	0:b802fc31f1db	247	if (len != sizeof sc) {
donatien	0:b802fc31f1db	248	return NULL;
donatien	0:b802fc31f1db	249	}
donatien	0:b802fc31f1db	250	MEMCPY(&t, token, len);
donatien	0:b802fc31f1db	251
donatien	0:b802fc31f1db	252	for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
donatien	0:b802fc31f1db	253	if (sc == t) {
donatien	0:b802fc31f1db	254	break;
donatien	0:b802fc31f1db	255	}
donatien	0:b802fc31f1db	256	}
donatien	0:b802fc31f1db	257
donatien	0:b802fc31f1db	258	if (sc == NULL) {
donatien	0:b802fc31f1db	259	PPPDEBUG(LOG_DEBUG, ("pppoe: alien host unique tag, no session found\n"));
donatien	0:b802fc31f1db	260	return NULL;
donatien	0:b802fc31f1db	261	}
donatien	0:b802fc31f1db	262
donatien	0:b802fc31f1db	263	/* should be safe to access sc now /
donatien	0:b802fc31f1db	264	if (sc->sc_state < PPPOE_STATE_PADI_SENT \|\| sc->sc_state >= PPPOE_STATE_SESSION) {
donatien	0:b802fc31f1db	265	printf("%c%c%"U16_F": host unique tag found, but it belongs to a connection in state %d\n",
donatien	0:b802fc31f1db	266	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_state);
donatien	0:b802fc31f1db	267	return NULL;
donatien	0:b802fc31f1db	268	}
donatien	0:b802fc31f1db	269	if (sc->sc_ethif != rcvif) {
donatien	0:b802fc31f1db	270	printf("%c%c%"U16_F": wrong interface, not accepting host unique\n",
donatien	0:b802fc31f1db	271	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
donatien	0:b802fc31f1db	272	return NULL;
donatien	0:b802fc31f1db	273	}
donatien	0:b802fc31f1db	274	return sc;
donatien	0:b802fc31f1db	275	}
donatien	0:b802fc31f1db	276
donatien	0:b802fc31f1db	277	static void
donatien	0:b802fc31f1db	278	pppoe_linkstatus_up(struct pppoe_softc *sc)
donatien	0:b802fc31f1db	279	{
donatien	0:b802fc31f1db	280	sc->sc_linkStatusCB(sc->sc_pd, 1);
donatien	0:b802fc31f1db	281	}
donatien	0:b802fc31f1db	282
donatien	0:b802fc31f1db	283	/* analyze and handle a single received packet while not in session state */
donatien	0:b802fc31f1db	284	static void
donatien	0:b802fc31f1db	285	pppoe_dispatch_disc_pkt(struct netif netif, struct pbuf pb)
donatien	0:b802fc31f1db	286	{
donatien	0:b802fc31f1db	287	u16_t tag, len;
donatien	0:b802fc31f1db	288	u16_t session, plen;
donatien	0:b802fc31f1db	289	struct pppoe_softc *sc;
donatien	0:b802fc31f1db	290	const char *err_msg;
donatien	0:b802fc31f1db	291	char devname[6];
donatien	0:b802fc31f1db	292	u8_t *ac_cookie;
donatien	0:b802fc31f1db	293	u16_t ac_cookie_len;
donatien	0:b802fc31f1db	294	#ifdef PPPOE_SERVER
donatien	0:b802fc31f1db	295	u8_t *hunique;
donatien	0:b802fc31f1db	296	size_t hunique_len;
donatien	0:b802fc31f1db	297	#endif
donatien	0:b802fc31f1db	298	struct pppoehdr *ph;
donatien	0:b802fc31f1db	299	struct pppoetag pt;
donatien	0:b802fc31f1db	300	int off, err, errortag;
donatien	0:b802fc31f1db	301	struct eth_hdr *ethhdr;
donatien	0:b802fc31f1db	302
donatien	0:b802fc31f1db	303	pb = pppSingleBuf(pb);
donatien	0:b802fc31f1db	304
donatien	0:b802fc31f1db	305	strcpy(devname, "pppoe"); /* as long as we don't know which instance */
donatien	0:b802fc31f1db	306	err_msg = NULL;
donatien	0:b802fc31f1db	307	errortag = 0;
donatien	0:b802fc31f1db	308	if (pb->len < sizeof(*ethhdr)) {
donatien	0:b802fc31f1db	309	goto done;
donatien	0:b802fc31f1db	310	}
donatien	0:b802fc31f1db	311	ethhdr = (struct eth_hdr *)pb->payload;
donatien	0:b802fc31f1db	312	off = sizeof(*ethhdr);
donatien	0:b802fc31f1db	313
donatien	0:b802fc31f1db	314	ac_cookie = NULL;
donatien	0:b802fc31f1db	315	ac_cookie_len = 0;
donatien	0:b802fc31f1db	316	#ifdef PPPOE_SERVER
donatien	0:b802fc31f1db	317	hunique = NULL;
donatien	0:b802fc31f1db	318	hunique_len = 0;
donatien	0:b802fc31f1db	319	#endif
donatien	0:b802fc31f1db	320	session = 0;
donatien	0:b802fc31f1db	321	if (pb->len - off < PPPOE_HEADERLEN) {
donatien	0:b802fc31f1db	322	printf("pppoe: packet too short: %d\n", pb->len);
donatien	0:b802fc31f1db	323	goto done;
donatien	0:b802fc31f1db	324	}
donatien	0:b802fc31f1db	325
donatien	0:b802fc31f1db	326	ph = (struct pppoehdr *) (ethhdr + 1);
donatien	0:b802fc31f1db	327	if (ph->vertype != PPPOE_VERTYPE) {
donatien	0:b802fc31f1db	328	printf("pppoe: unknown version/type packet: 0x%x\n", ph->vertype);
donatien	0:b802fc31f1db	329	goto done;
donatien	0:b802fc31f1db	330	}
donatien	0:b802fc31f1db	331	session = ntohs(ph->session);
donatien	0:b802fc31f1db	332	plen = ntohs(ph->plen);
donatien	0:b802fc31f1db	333	off += sizeof(*ph);
donatien	0:b802fc31f1db	334
donatien	0:b802fc31f1db	335	if (plen + off > pb->len) {
donatien	0:b802fc31f1db	336	printf("pppoe: packet content does not fit: data available = %d, packet size = %u\n",
donatien	0:b802fc31f1db	337	pb->len - off, plen);
donatien	0:b802fc31f1db	338	goto done;
donatien	0:b802fc31f1db	339	}
donatien	0:b802fc31f1db	340	if(pb->tot_len == pb->len) {
donatien	0:b802fc31f1db	341	pb->tot_len = pb->len = (u16_t)off + plen; /* ignore trailing garbage */
donatien	0:b802fc31f1db	342	}
donatien	0:b802fc31f1db	343	tag = 0;
donatien	0:b802fc31f1db	344	len = 0;
donatien	0:b802fc31f1db	345	sc = NULL;
donatien	0:b802fc31f1db	346	while (off + sizeof(pt) <= pb->len) {
donatien	0:b802fc31f1db	347	MEMCPY(&pt, (u8_t*)pb->payload + off, sizeof(pt));
donatien	0:b802fc31f1db	348	tag = ntohs(pt.tag);
donatien	0:b802fc31f1db	349	len = ntohs(pt.len);
donatien	0:b802fc31f1db	350	if (off + sizeof(pt) + len > pb->len) {
donatien	0:b802fc31f1db	351	printf("pppoe: tag 0x%x len 0x%x is too long\n", tag, len);
donatien	0:b802fc31f1db	352	goto done;
donatien	0:b802fc31f1db	353	}
donatien	0:b802fc31f1db	354	switch (tag) {
donatien	0:b802fc31f1db	355	case PPPOE_TAG_EOL:
donatien	0:b802fc31f1db	356	goto breakbreak;
donatien	0:b802fc31f1db	357	case PPPOE_TAG_SNAME:
donatien	0:b802fc31f1db	358	break; /* ignored */
donatien	0:b802fc31f1db	359	case PPPOE_TAG_ACNAME:
donatien	0:b802fc31f1db	360	break; /* ignored */
donatien	0:b802fc31f1db	361	case PPPOE_TAG_HUNIQUE:
donatien	0:b802fc31f1db	362	if (sc != NULL) {
donatien	0:b802fc31f1db	363	break;
donatien	0:b802fc31f1db	364	}
donatien	0:b802fc31f1db	365	#ifdef PPPOE_SERVER
donatien	0:b802fc31f1db	366	hunique = (u8_t*)pb->payload + off + sizeof(pt);
donatien	0:b802fc31f1db	367	hunique_len = len;
donatien	0:b802fc31f1db	368	#endif
donatien	0:b802fc31f1db	369	sc = pppoe_find_softc_by_hunique((u8_t*)pb->payload + off + sizeof(pt), len, netif);
donatien	0:b802fc31f1db	370	if (sc != NULL) {
donatien	0:b802fc31f1db	371	snprintf(devname, sizeof(devname), "%c%c%"U16_F, sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
donatien	0:b802fc31f1db	372	}
donatien	0:b802fc31f1db	373	break;
donatien	0:b802fc31f1db	374	case PPPOE_TAG_ACCOOKIE:
donatien	0:b802fc31f1db	375	if (ac_cookie == NULL) {
donatien	0:b802fc31f1db	376	ac_cookie = (u8_t*)pb->payload + off + sizeof(pt);
donatien	0:b802fc31f1db	377	ac_cookie_len = len;
donatien	0:b802fc31f1db	378	}
donatien	0:b802fc31f1db	379	break;
donatien	0:b802fc31f1db	380	case PPPOE_TAG_SNAME_ERR:
donatien	0:b802fc31f1db	381	err_msg = "SERVICE NAME ERROR";
donatien	0:b802fc31f1db	382	errortag = 1;
donatien	0:b802fc31f1db	383	break;
donatien	0:b802fc31f1db	384	case PPPOE_TAG_ACSYS_ERR:
donatien	0:b802fc31f1db	385	err_msg = "AC SYSTEM ERROR";
donatien	0:b802fc31f1db	386	errortag = 1;
donatien	0:b802fc31f1db	387	break;
donatien	0:b802fc31f1db	388	case PPPOE_TAG_GENERIC_ERR:
donatien	0:b802fc31f1db	389	err_msg = "GENERIC ERROR";
donatien	0:b802fc31f1db	390	errortag = 1;
donatien	0:b802fc31f1db	391	break;
donatien	0:b802fc31f1db	392	}
donatien	0:b802fc31f1db	393	if (err_msg) {
donatien	0:b802fc31f1db	394	if (errortag && len) {
donatien	0:b802fc31f1db	395	u16_t error_len = LWIP_MIN(len, sizeof(pppoe_error_tmp)-1);
donatien	0:b802fc31f1db	396	strncpy(pppoe_error_tmp, (char*)pb->payload + off + sizeof(pt), error_len);
donatien	0:b802fc31f1db	397	pppoe_error_tmp[error_len-1] = '\0';
donatien	0:b802fc31f1db	398	printf("%s: %s: %s\n", devname, err_msg, pppoe_error_tmp);
donatien	0:b802fc31f1db	399	} else {
donatien	0:b802fc31f1db	400	printf("%s: %s\n", devname, err_msg);
donatien	0:b802fc31f1db	401	}
donatien	0:b802fc31f1db	402	if (errortag) {
donatien	0:b802fc31f1db	403	goto done;
donatien	0:b802fc31f1db	404	}
donatien	0:b802fc31f1db	405	}
donatien	0:b802fc31f1db	406	off += sizeof(pt) + len;
donatien	0:b802fc31f1db	407	}
donatien	0:b802fc31f1db	408
donatien	0:b802fc31f1db	409	breakbreak:;
donatien	0:b802fc31f1db	410	switch (ph->code) {
donatien	0:b802fc31f1db	411	case PPPOE_CODE_PADI:
donatien	0:b802fc31f1db	412	#ifdef PPPOE_SERVER
donatien	0:b802fc31f1db	413	/*
donatien	0:b802fc31f1db	414	* got service name, concentrator name, and/or host unique.
donatien	0:b802fc31f1db	415	* ignore if we have no interfaces with IFF_PASSIVE\|IFF_UP.
donatien	0:b802fc31f1db	416	*/
donatien	0:b802fc31f1db	417	if (LIST_EMPTY(&pppoe_softc_list)) {
donatien	0:b802fc31f1db	418	goto done;
donatien	0:b802fc31f1db	419	}
donatien	0:b802fc31f1db	420	LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
donatien	0:b802fc31f1db	421	if (!(sc->sc_sppp.pp_if.if_flags & IFF_UP)) {
donatien	0:b802fc31f1db	422	continue;
donatien	0:b802fc31f1db	423	}
donatien	0:b802fc31f1db	424	if (!(sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
donatien	0:b802fc31f1db	425	continue;
donatien	0:b802fc31f1db	426	}
donatien	0:b802fc31f1db	427	if (sc->sc_state == PPPOE_STATE_INITIAL) {
donatien	0:b802fc31f1db	428	break;
donatien	0:b802fc31f1db	429	}
donatien	0:b802fc31f1db	430	}
donatien	0:b802fc31f1db	431	if (sc == NULL) {
donatien	0:b802fc31f1db	432	/* printf("pppoe: free passive interface is not found\n"); */
donatien	0:b802fc31f1db	433	goto done;
donatien	0:b802fc31f1db	434	}
donatien	0:b802fc31f1db	435	if (hunique) {
donatien	0:b802fc31f1db	436	if (sc->sc_hunique) {
donatien	0:b802fc31f1db	437	mem_free(sc->sc_hunique);
donatien	0:b802fc31f1db	438	}
donatien	0:b802fc31f1db	439	sc->sc_hunique = mem_malloc(hunique_len);
donatien	0:b802fc31f1db	440	if (sc->sc_hunique == NULL) {
donatien	0:b802fc31f1db	441	goto done;
donatien	0:b802fc31f1db	442	}
donatien	0:b802fc31f1db	443	sc->sc_hunique_len = hunique_len;
donatien	0:b802fc31f1db	444	MEMCPY(sc->sc_hunique, hunique, hunique_len);
donatien	0:b802fc31f1db	445	}
donatien	0:b802fc31f1db	446	MEMCPY(&sc->sc_dest, eh->ether_shost, sizeof sc->sc_dest);
donatien	0:b802fc31f1db	447	sc->sc_state = PPPOE_STATE_PADO_SENT;
donatien	0:b802fc31f1db	448	pppoe_send_pado(sc);
donatien	0:b802fc31f1db	449	break;
donatien	0:b802fc31f1db	450	#endif /* PPPOE_SERVER */
donatien	0:b802fc31f1db	451	case PPPOE_CODE_PADR:
donatien	0:b802fc31f1db	452	#ifdef PPPOE_SERVER
donatien	0:b802fc31f1db	453	/*
donatien	0:b802fc31f1db	454	* get sc from ac_cookie if IFF_PASSIVE
donatien	0:b802fc31f1db	455	*/
donatien	0:b802fc31f1db	456	if (ac_cookie == NULL) {
donatien	0:b802fc31f1db	457	/* be quiet if there is not a single pppoe instance */
donatien	0:b802fc31f1db	458	printf("pppoe: received PADR but not includes ac_cookie\n");
donatien	0:b802fc31f1db	459	goto done;
donatien	0:b802fc31f1db	460	}
donatien	0:b802fc31f1db	461	sc = pppoe_find_softc_by_hunique(ac_cookie, ac_cookie_len, netif);
donatien	0:b802fc31f1db	462	if (sc == NULL) {
donatien	0:b802fc31f1db	463	/* be quiet if there is not a single pppoe instance */
donatien	0:b802fc31f1db	464	if (!LIST_EMPTY(&pppoe_softc_list)) {
donatien	0:b802fc31f1db	465	printf("pppoe: received PADR but could not find request for it\n");
donatien	0:b802fc31f1db	466	}
donatien	0:b802fc31f1db	467	goto done;
donatien	0:b802fc31f1db	468	}
donatien	0:b802fc31f1db	469	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
donatien	0:b802fc31f1db	470	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:b802fc31f1db	471	goto done;
donatien	0:b802fc31f1db	472	}
donatien	0:b802fc31f1db	473	if (hunique) {
donatien	0:b802fc31f1db	474	if (sc->sc_hunique) {
donatien	0:b802fc31f1db	475	mem_free(sc->sc_hunique);
donatien	0:b802fc31f1db	476	}
donatien	0:b802fc31f1db	477	sc->sc_hunique = mem_malloc(hunique_len);
donatien	0:b802fc31f1db	478	if (sc->sc_hunique == NULL) {
donatien	0:b802fc31f1db	479	goto done;
donatien	0:b802fc31f1db	480	}
donatien	0:b802fc31f1db	481	sc->sc_hunique_len = hunique_len;
donatien	0:b802fc31f1db	482	MEMCPY(sc->sc_hunique, hunique, hunique_len);
donatien	0:b802fc31f1db	483	}
donatien	0:b802fc31f1db	484	pppoe_send_pads(sc);
donatien	0:b802fc31f1db	485	sc->sc_state = PPPOE_STATE_SESSION;
donatien	0:b802fc31f1db	486	pppoe_linkstatus_up(sc); /* notify upper layers */
donatien	0:b802fc31f1db	487	break;
donatien	0:b802fc31f1db	488	#else
donatien	0:b802fc31f1db	489	/* ignore, we are no access concentrator */
donatien	0:b802fc31f1db	490	goto done;
donatien	0:b802fc31f1db	491	#endif /* PPPOE_SERVER */
donatien	0:b802fc31f1db	492	case PPPOE_CODE_PADO:
donatien	0:b802fc31f1db	493	if (sc == NULL) {
donatien	0:b802fc31f1db	494	/* be quiet if there is not a single pppoe instance */
donatien	0:b802fc31f1db	495	if (pppoe_softc_list != NULL) {
donatien	0:b802fc31f1db	496	printf("pppoe: received PADO but could not find request for it\n");
donatien	0:b802fc31f1db	497	}
donatien	0:b802fc31f1db	498	goto done;
donatien	0:b802fc31f1db	499	}
donatien	0:b802fc31f1db	500	if (sc->sc_state != PPPOE_STATE_PADI_SENT) {
donatien	0:b802fc31f1db	501	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:b802fc31f1db	502	goto done;
donatien	0:b802fc31f1db	503	}
donatien	0:b802fc31f1db	504	if (ac_cookie) {
donatien	0:b802fc31f1db	505	sc->sc_ac_cookie_len = ac_cookie_len;
donatien	0:b802fc31f1db	506	MEMCPY(sc->sc_ac_cookie, ac_cookie, ac_cookie_len);
donatien	0:b802fc31f1db	507	}
donatien	0:b802fc31f1db	508	MEMCPY(&sc->sc_dest, ethhdr->src.addr, sizeof(sc->sc_dest.addr));
donatien	0:b802fc31f1db	509	sys_untimeout(pppoe_timeout, sc);
donatien	0:b802fc31f1db	510	sc->sc_padr_retried = 0;
donatien	0:b802fc31f1db	511	sc->sc_state = PPPOE_STATE_PADR_SENT;
donatien	0:b802fc31f1db	512	if ((err = pppoe_send_padr(sc)) != 0) {
donatien	0:b802fc31f1db	513	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:b802fc31f1db	514	}
donatien	0:b802fc31f1db	515	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
donatien	0:b802fc31f1db	516	break;
donatien	0:b802fc31f1db	517	case PPPOE_CODE_PADS:
donatien	0:b802fc31f1db	518	if (sc == NULL) {
donatien	0:b802fc31f1db	519	goto done;
donatien	0:b802fc31f1db	520	}
donatien	0:b802fc31f1db	521	sc->sc_session = session;
donatien	0:b802fc31f1db	522	sys_untimeout(pppoe_timeout, sc);
donatien	0:b802fc31f1db	523	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:b802fc31f1db	524	sc->sc_state = PPPOE_STATE_SESSION;
donatien	0:b802fc31f1db	525	pppoe_linkstatus_up(sc); /* notify upper layers */
donatien	0:b802fc31f1db	526	break;
donatien	0:b802fc31f1db	527	case PPPOE_CODE_PADT:
donatien	0:b802fc31f1db	528	if (sc == NULL) {
donatien	0:b802fc31f1db	529	goto done;
donatien	0:b802fc31f1db	530	}
donatien	0:b802fc31f1db	531	pppoe_clear_softc(sc, "received PADT");
donatien	0:b802fc31f1db	532	break;
donatien	0:b802fc31f1db	533	default:
donatien	0:b802fc31f1db	534	if(sc) {
donatien	0:b802fc31f1db	535	printf("%c%c%"U16_F": unknown code (0x%"X16_F") session = 0x%"X16_F"\n",
donatien	0:b802fc31f1db	536	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
donatien	0:b802fc31f1db	537	(u16_t)ph->code, session);
donatien	0:b802fc31f1db	538	} else {
donatien	0:b802fc31f1db	539	printf("pppoe: unknown code (0x%"X16_F") session = 0x%"X16_F"\n", (u16_t)ph->code, session);
donatien	0:b802fc31f1db	540	}
donatien	0:b802fc31f1db	541	break;
donatien	0:b802fc31f1db	542	}
donatien	0:b802fc31f1db	543
donatien	0:b802fc31f1db	544	done:
donatien	0:b802fc31f1db	545	pbuf_free(pb);
donatien	0:b802fc31f1db	546	return;
donatien	0:b802fc31f1db	547	}
donatien	0:b802fc31f1db	548
donatien	0:b802fc31f1db	549	void
donatien	0:b802fc31f1db	550	pppoe_disc_input(struct netif netif, struct pbuf p)
donatien	0:b802fc31f1db	551	{
donatien	0:b802fc31f1db	552	/* avoid error messages if there is not a single pppoe instance */
donatien	0:b802fc31f1db	553	if (pppoe_softc_list != NULL) {
donatien	0:b802fc31f1db	554	pppoe_dispatch_disc_pkt(netif, p);
donatien	0:b802fc31f1db	555	} else {
donatien	0:b802fc31f1db	556	pbuf_free(p);
donatien	0:b802fc31f1db	557	}
donatien	0:b802fc31f1db	558	}
donatien	0:b802fc31f1db	559
donatien	0:b802fc31f1db	560	void
donatien	0:b802fc31f1db	561	pppoe_data_input(struct netif netif, struct pbuf pb)
donatien	0:b802fc31f1db	562	{
donatien	0:b802fc31f1db	563	u16_t session, plen;
donatien	0:b802fc31f1db	564	struct pppoe_softc *sc;
donatien	0:b802fc31f1db	565	struct pppoehdr *ph;
donatien	0:b802fc31f1db	566	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
donatien	0:b802fc31f1db	567	u8_t shost[ETHER_ADDR_LEN];
donatien	0:b802fc31f1db	568	#endif
donatien	0:b802fc31f1db	569
donatien	0:b802fc31f1db	570	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
donatien	0:b802fc31f1db	571	MEMCPY(shost, ((struct eth_hdr *)pb->payload)->src.addr, sizeof(shost));
donatien	0:b802fc31f1db	572	#endif
donatien	0:b802fc31f1db	573	if (pbuf_header(pb, -(int)sizeof(struct eth_hdr)) != 0) {
donatien	0:b802fc31f1db	574	/* bail out */
donatien	0:b802fc31f1db	575	PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header failed\n"));
donatien	0:b802fc31f1db	576	LINK_STATS_INC(link.lenerr);
donatien	0:b802fc31f1db	577	goto drop;
donatien	0:b802fc31f1db	578	}
donatien	0:b802fc31f1db	579
donatien	0:b802fc31f1db	580	pb = pppSingleBuf (pb);
donatien	0:b802fc31f1db	581
donatien	0:b802fc31f1db	582	if (pb->len <= PPPOE_HEADERLEN) {
donatien	0:b802fc31f1db	583	printf("pppoe (data): dropping too short packet: %d bytes\n", pb->len);
donatien	0:b802fc31f1db	584	goto drop;
donatien	0:b802fc31f1db	585	}
donatien	0:b802fc31f1db	586
donatien	0:b802fc31f1db	587	if (pb->len < sizeof(*ph)) {
donatien	0:b802fc31f1db	588	printf("pppoe_data_input: could not get PPPoE header\n");
donatien	0:b802fc31f1db	589	goto drop;
donatien	0:b802fc31f1db	590	}
donatien	0:b802fc31f1db	591	ph = (struct pppoehdr *)pb->payload;
donatien	0:b802fc31f1db	592
donatien	0:b802fc31f1db	593	if (ph->vertype != PPPOE_VERTYPE) {
donatien	0:b802fc31f1db	594	printf("pppoe (data): unknown version/type packet: 0x%x\n", ph->vertype);
donatien	0:b802fc31f1db	595	goto drop;
donatien	0:b802fc31f1db	596	}
donatien	0:b802fc31f1db	597	if (ph->code != 0) {
donatien	0:b802fc31f1db	598	goto drop;
donatien	0:b802fc31f1db	599	}
donatien	0:b802fc31f1db	600
donatien	0:b802fc31f1db	601	session = ntohs(ph->session);
donatien	0:b802fc31f1db	602	sc = pppoe_find_softc_by_session(session, netif);
donatien	0:b802fc31f1db	603	if (sc == NULL) {
donatien	0:b802fc31f1db	604	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
donatien	0:b802fc31f1db	605	printf("pppoe: input for unknown session 0x%x, sending PADT\n", session);
donatien	0:b802fc31f1db	606	pppoe_send_padt(netif, session, shost);
donatien	0:b802fc31f1db	607	#endif
donatien	0:b802fc31f1db	608	goto drop;
donatien	0:b802fc31f1db	609	}
donatien	0:b802fc31f1db	610
donatien	0:b802fc31f1db	611	plen = ntohs(ph->plen);
donatien	0:b802fc31f1db	612
donatien	0:b802fc31f1db	613	if (pbuf_header(pb, -(int)(PPPOE_HEADERLEN)) != 0) {
donatien	0:b802fc31f1db	614	/* bail out */
donatien	0:b802fc31f1db	615	PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header PPPOE_HEADERLEN failed\n"));
donatien	0:b802fc31f1db	616	LINK_STATS_INC(link.lenerr);
donatien	0:b802fc31f1db	617	goto drop;
donatien	0:b802fc31f1db	618	}
donatien	0:b802fc31f1db	619
donatien	0:b802fc31f1db	620	PPPDEBUG(LOG_DEBUG, ("pppoe_data_input: %c%c%"U16_F": pkthdr.len=%d, pppoe.len=%d\n",
donatien	0:b802fc31f1db	621	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
donatien	0:b802fc31f1db	622	pb->len, plen));
donatien	0:b802fc31f1db	623
donatien	0:b802fc31f1db	624	if (pb->len < plen) {
donatien	0:b802fc31f1db	625	goto drop;
donatien	0:b802fc31f1db	626	}
donatien	0:b802fc31f1db	627
donatien	0:b802fc31f1db	628	pppInProcOverEthernet(sc->sc_pd, pb);
donatien	0:b802fc31f1db	629
donatien	0:b802fc31f1db	630	return;
donatien	0:b802fc31f1db	631
donatien	0:b802fc31f1db	632	drop:
donatien	0:b802fc31f1db	633	pbuf_free(pb);
donatien	0:b802fc31f1db	634	}
donatien	0:b802fc31f1db	635
donatien	0:b802fc31f1db	636	static err_t
donatien	0:b802fc31f1db	637	pppoe_output(struct pppoe_softc sc, struct pbuf pb)
donatien	0:b802fc31f1db	638	{
donatien	0:b802fc31f1db	639	struct eth_hdr *ethhdr;
donatien	0:b802fc31f1db	640	u16_t etype;
donatien	0:b802fc31f1db	641	err_t res;
donatien	0:b802fc31f1db	642
donatien	0:b802fc31f1db	643	if (!sc->sc_ethif) {
donatien	0:b802fc31f1db	644	pbuf_free(pb);
donatien	0:b802fc31f1db	645	return ERR_IF;
donatien	0:b802fc31f1db	646	}
donatien	0:b802fc31f1db	647
donatien	0:b802fc31f1db	648	ethhdr = (struct eth_hdr *)pb->payload;
donatien	0:b802fc31f1db	649	etype = sc->sc_state == PPPOE_STATE_SESSION ? ETHTYPE_PPPOE : ETHTYPE_PPPOEDISC;
donatien	0:b802fc31f1db	650	ethhdr->type = htons(etype);
donatien	0:b802fc31f1db	651	MEMCPY(ethhdr->dest.addr, sc->sc_dest.addr, sizeof(ethhdr->dest.addr));
donatien	0:b802fc31f1db	652	MEMCPY(ethhdr->src.addr, ((struct eth_addr *)sc->sc_ethif->hwaddr)->addr, sizeof(ethhdr->src.addr));
donatien	0:b802fc31f1db	653
donatien	0:b802fc31f1db	654	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:b802fc31f1db	655	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, etype,
donatien	0:b802fc31f1db	656	sc->sc_state, sc->sc_session,
donatien	0:b802fc31f1db	657	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:b802fc31f1db	658	pb->tot_len));
donatien	0:b802fc31f1db	659
donatien	0:b802fc31f1db	660	res = sc->sc_ethif->linkoutput(sc->sc_ethif, pb);
donatien	0:b802fc31f1db	661
donatien	0:b802fc31f1db	662	pbuf_free(pb);
donatien	0:b802fc31f1db	663
donatien	0:b802fc31f1db	664	return res;
donatien	0:b802fc31f1db	665	}
donatien	0:b802fc31f1db	666
donatien	0:b802fc31f1db	667	static err_t
donatien	0:b802fc31f1db	668	pppoe_send_padi(struct pppoe_softc *sc)
donatien	0:b802fc31f1db	669	{
donatien	0:b802fc31f1db	670	struct pbuf *pb;
donatien	0:b802fc31f1db	671	u8_t *p;
donatien	0:b802fc31f1db	672	int len;
donatien	0:b802fc31f1db	673	#ifdef PPPOE_TODO
donatien	0:b802fc31f1db	674	int l1 = 0, l2 = 0; /* XXX: gcc */
donatien	0:b802fc31f1db	675	#endif /* PPPOE_TODO */
donatien	0:b802fc31f1db	676
donatien	0:b802fc31f1db	677	if (sc->sc_state >PPPOE_STATE_PADI_SENT) {
donatien	0:b802fc31f1db	678	PPPDEBUG(LOG_ERR, ("ERROR: pppoe_send_padi in state %d", sc->sc_state));
donatien	0:b802fc31f1db	679	}
donatien	0:b802fc31f1db	680
donatien	0:b802fc31f1db	681	/* calculate length of frame (excluding ethernet header + pppoe header) */
donatien	0:b802fc31f1db	682	len = 2 + 2 + 2 + 2 + sizeof sc; /* service name tag is required, host unique is send too */
donatien	0:b802fc31f1db	683	#ifdef PPPOE_TODO
donatien	0:b802fc31f1db	684	if (sc->sc_service_name != NULL) {
donatien	0:b802fc31f1db	685	l1 = (int)strlen(sc->sc_service_name);
donatien	0:b802fc31f1db	686	len += l1;
donatien	0:b802fc31f1db	687	}
donatien	0:b802fc31f1db	688	if (sc->sc_concentrator_name != NULL) {
donatien	0:b802fc31f1db	689	l2 = (int)strlen(sc->sc_concentrator_name);
donatien	0:b802fc31f1db	690	len += 2 + 2 + l2;
donatien	0:b802fc31f1db	691	}
donatien	0:b802fc31f1db	692	#endif /* PPPOE_TODO */
donatien	0:b802fc31f1db	693	LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
donatien	0:b802fc31f1db	694	sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
donatien	0:b802fc31f1db	695
donatien	0:b802fc31f1db	696	/* allocate a buffer */
donatien	0:b802fc31f1db	697	pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
donatien	0:b802fc31f1db	698	if (!pb) {
donatien	0:b802fc31f1db	699	return ERR_MEM;
donatien	0:b802fc31f1db	700	}
donatien	0:b802fc31f1db	701	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
donatien	0:b802fc31f1db	702
donatien	0:b802fc31f1db	703	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
donatien	0:b802fc31f1db	704	/* fill in pkt */
donatien	0:b802fc31f1db	705	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADI, 0, (u16_t)len);
donatien	0:b802fc31f1db	706	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
donatien	0:b802fc31f1db	707	#ifdef PPPOE_TODO
donatien	0:b802fc31f1db	708	if (sc->sc_service_name != NULL) {
donatien	0:b802fc31f1db	709	PPPOE_ADD_16(p, l1);
donatien	0:b802fc31f1db	710	MEMCPY(p, sc->sc_service_name, l1);
donatien	0:b802fc31f1db	711	p += l1;
donatien	0:b802fc31f1db	712	} else
donatien	0:b802fc31f1db	713	#endif /* PPPOE_TODO */
donatien	0:b802fc31f1db	714	{
donatien	0:b802fc31f1db	715	PPPOE_ADD_16(p, 0);
donatien	0:b802fc31f1db	716	}
donatien	0:b802fc31f1db	717	#ifdef PPPOE_TODO
donatien	0:b802fc31f1db	718	if (sc->sc_concentrator_name != NULL) {
donatien	0:b802fc31f1db	719	PPPOE_ADD_16(p, PPPOE_TAG_ACNAME);
donatien	0:b802fc31f1db	720	PPPOE_ADD_16(p, l2);
donatien	0:b802fc31f1db	721	MEMCPY(p, sc->sc_concentrator_name, l2);
donatien	0:b802fc31f1db	722	p += l2;
donatien	0:b802fc31f1db	723	}
donatien	0:b802fc31f1db	724	#endif /* PPPOE_TODO */
donatien	0:b802fc31f1db	725	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
donatien	0:b802fc31f1db	726	PPPOE_ADD_16(p, sizeof(sc));
donatien	0:b802fc31f1db	727	MEMCPY(p, &sc, sizeof sc);
donatien	0:b802fc31f1db	728
donatien	0:b802fc31f1db	729	/* send pkt */
donatien	0:b802fc31f1db	730	return pppoe_output(sc, pb);
donatien	0:b802fc31f1db	731	}
donatien	0:b802fc31f1db	732
donatien	0:b802fc31f1db	733	static void
donatien	0:b802fc31f1db	734	pppoe_timeout(void *arg)
donatien	0:b802fc31f1db	735	{
donatien	0:b802fc31f1db	736	int retry_wait, err;
donatien	0:b802fc31f1db	737	struct pppoe_softc sc = (struct pppoe_softc)arg;
donatien	0:b802fc31f1db	738
donatien	0:b802fc31f1db	739	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:b802fc31f1db	740
donatien	0:b802fc31f1db	741	switch (sc->sc_state) {
donatien	0:b802fc31f1db	742	case PPPOE_STATE_PADI_SENT:
donatien	0:b802fc31f1db	743	/*
donatien	0:b802fc31f1db	744	* We have two basic ways of retrying:
donatien	0:b802fc31f1db	745	* - Quick retry mode: try a few times in short sequence
donatien	0:b802fc31f1db	746	* - Slow retry mode: we already had a connection successfully
donatien	0:b802fc31f1db	747	* established and will try infinitely (without user
donatien	0:b802fc31f1db	748	* intervention)
donatien	0:b802fc31f1db	749	* We only enter slow retry mode if IFF_LINK1 (aka autodial)
donatien	0:b802fc31f1db	750	* is not set.
donatien	0:b802fc31f1db	751	*/
donatien	0:b802fc31f1db	752
donatien	0:b802fc31f1db	753	/* initialize for quick retry mode */
donatien	0:b802fc31f1db	754	retry_wait = PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried);
donatien	0:b802fc31f1db	755
donatien	0:b802fc31f1db	756	sc->sc_padi_retried++;
donatien	0:b802fc31f1db	757	if (sc->sc_padi_retried >= PPPOE_DISC_MAXPADI) {
donatien	0:b802fc31f1db	758	#if 0
donatien	0:b802fc31f1db	759	if ((sc->sc_sppp.pp_if.if_flags & IFF_LINK1) == 0) {
donatien	0:b802fc31f1db	760	/* slow retry mode */
donatien	0:b802fc31f1db	761	retry_wait = PPPOE_SLOW_RETRY;
donatien	0:b802fc31f1db	762	} else
donatien	0:b802fc31f1db	763	#endif
donatien	0:b802fc31f1db	764	{
donatien	0:b802fc31f1db	765	pppoe_abort_connect(sc);
donatien	0:b802fc31f1db	766	return;
donatien	0:b802fc31f1db	767	}
donatien	0:b802fc31f1db	768	}
donatien	0:b802fc31f1db	769	if ((err = pppoe_send_padi(sc)) != 0) {
donatien	0:b802fc31f1db	770	sc->sc_padi_retried--;
donatien	0:b802fc31f1db	771	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:b802fc31f1db	772	}
donatien	0:b802fc31f1db	773	sys_timeout(retry_wait, pppoe_timeout, sc);
donatien	0:b802fc31f1db	774	break;
donatien	0:b802fc31f1db	775
donatien	0:b802fc31f1db	776	case PPPOE_STATE_PADR_SENT:
donatien	0:b802fc31f1db	777	sc->sc_padr_retried++;
donatien	0:b802fc31f1db	778	if (sc->sc_padr_retried >= PPPOE_DISC_MAXPADR) {
donatien	0:b802fc31f1db	779	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
donatien	0:b802fc31f1db	780	sc->sc_state = PPPOE_STATE_PADI_SENT;
donatien	0:b802fc31f1db	781	sc->sc_padr_retried = 0;
donatien	0:b802fc31f1db	782	if ((err = pppoe_send_padi(sc)) != 0) {
donatien	0:b802fc31f1db	783	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:b802fc31f1db	784	}
donatien	0:b802fc31f1db	785	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried), pppoe_timeout, sc);
donatien	0:b802fc31f1db	786	return;
donatien	0:b802fc31f1db	787	}
donatien	0:b802fc31f1db	788	if ((err = pppoe_send_padr(sc)) != 0) {
donatien	0:b802fc31f1db	789	sc->sc_padr_retried--;
donatien	0:b802fc31f1db	790	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:b802fc31f1db	791	}
donatien	0:b802fc31f1db	792	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
donatien	0:b802fc31f1db	793	break;
donatien	0:b802fc31f1db	794	case PPPOE_STATE_CLOSING:
donatien	0:b802fc31f1db	795	pppoe_do_disconnect(sc);
donatien	0:b802fc31f1db	796	break;
donatien	0:b802fc31f1db	797	default:
donatien	0:b802fc31f1db	798	return; /* all done, work in peace */
donatien	0:b802fc31f1db	799	}
donatien	0:b802fc31f1db	800	}
donatien	0:b802fc31f1db	801
donatien	0:b802fc31f1db	802	/* Start a connection (i.e. initiate discovery phase) */
donatien	0:b802fc31f1db	803	int
donatien	0:b802fc31f1db	804	pppoe_connect(struct pppoe_softc *sc)
donatien	0:b802fc31f1db	805	{
donatien	0:b802fc31f1db	806	int err;
donatien	0:b802fc31f1db	807
donatien	0:b802fc31f1db	808	if (sc->sc_state != PPPOE_STATE_INITIAL) {
donatien	0:b802fc31f1db	809	return EBUSY;
donatien	0:b802fc31f1db	810	}
donatien	0:b802fc31f1db	811
donatien	0:b802fc31f1db	812	#ifdef PPPOE_SERVER
donatien	0:b802fc31f1db	813	/* wait PADI if IFF_PASSIVE */
donatien	0:b802fc31f1db	814	if ((sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
donatien	0:b802fc31f1db	815	return 0;
donatien	0:b802fc31f1db	816	}
donatien	0:b802fc31f1db	817	#endif
donatien	0:b802fc31f1db	818	/* save state, in case we fail to send PADI */
donatien	0:b802fc31f1db	819	sc->sc_state = PPPOE_STATE_PADI_SENT;
donatien	0:b802fc31f1db	820	sc->sc_padr_retried = 0;
donatien	0:b802fc31f1db	821	err = pppoe_send_padi(sc);
donatien	0:b802fc31f1db	822	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:b802fc31f1db	823	sys_timeout(PPPOE_DISC_TIMEOUT, pppoe_timeout, sc);
donatien	0:b802fc31f1db	824	return err;
donatien	0:b802fc31f1db	825	}
donatien	0:b802fc31f1db	826
donatien	0:b802fc31f1db	827	/* disconnect */
donatien	0:b802fc31f1db	828	void
donatien	0:b802fc31f1db	829	pppoe_disconnect(struct pppoe_softc *sc)
donatien	0:b802fc31f1db	830	{
donatien	0:b802fc31f1db	831	if (sc->sc_state < PPPOE_STATE_SESSION) {
donatien	0:b802fc31f1db	832	return;
donatien	0:b802fc31f1db	833	}
donatien	0:b802fc31f1db	834	/*
donatien	0:b802fc31f1db	835	* Do not call pppoe_disconnect here, the upper layer state
donatien	0:b802fc31f1db	836	* machine gets confused by this. We must return from this
donatien	0:b802fc31f1db	837	* function and defer disconnecting to the timeout handler.
donatien	0:b802fc31f1db	838	*/
donatien	0:b802fc31f1db	839	sc->sc_state = PPPOE_STATE_CLOSING;
donatien	0:b802fc31f1db	840	sys_timeout(20, pppoe_timeout, sc);
donatien	0:b802fc31f1db	841	}
donatien	0:b802fc31f1db	842
donatien	0:b802fc31f1db	843	static int
donatien	0:b802fc31f1db	844	pppoe_do_disconnect(struct pppoe_softc *sc)
donatien	0:b802fc31f1db	845	{
donatien	0:b802fc31f1db	846	int err;
donatien	0:b802fc31f1db	847
donatien	0:b802fc31f1db	848	if (sc->sc_state < PPPOE_STATE_SESSION) {
donatien	0:b802fc31f1db	849	err = EBUSY;
donatien	0:b802fc31f1db	850	} else {
donatien	0:b802fc31f1db	851	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:b802fc31f1db	852	err = pppoe_send_padt(sc->sc_ethif, sc->sc_session, (const u8_t *)&sc->sc_dest);
donatien	0:b802fc31f1db	853	}
donatien	0:b802fc31f1db	854
donatien	0:b802fc31f1db	855	/* cleanup softc */
donatien	0:b802fc31f1db	856	sc->sc_state = PPPOE_STATE_INITIAL;
donatien	0:b802fc31f1db	857	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
donatien	0:b802fc31f1db	858	sc->sc_ac_cookie_len = 0;
donatien	0:b802fc31f1db	859	#ifdef PPPOE_SERVER
donatien	0:b802fc31f1db	860	if (sc->sc_hunique) {
donatien	0:b802fc31f1db	861	mem_free(sc->sc_hunique);
donatien	0:b802fc31f1db	862	sc->sc_hunique = NULL;
donatien	0:b802fc31f1db	863	}
donatien	0:b802fc31f1db	864	sc->sc_hunique_len = 0;
donatien	0:b802fc31f1db	865	#endif
donatien	0:b802fc31f1db	866	sc->sc_session = 0;
donatien	0:b802fc31f1db	867
donatien	0:b802fc31f1db	868	sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
donatien	0:b802fc31f1db	869
donatien	0:b802fc31f1db	870	return err;
donatien	0:b802fc31f1db	871	}
donatien	0:b802fc31f1db	872
donatien	0:b802fc31f1db	873	/* Connection attempt aborted */
donatien	0:b802fc31f1db	874	static void
donatien	0:b802fc31f1db	875	pppoe_abort_connect(struct pppoe_softc *sc)
donatien	0:b802fc31f1db	876	{
donatien	0:b802fc31f1db	877	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:b802fc31f1db	878	sc->sc_state = PPPOE_STATE_CLOSING;
donatien	0:b802fc31f1db	879
donatien	0:b802fc31f1db	880	sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
donatien	0:b802fc31f1db	881
donatien	0:b802fc31f1db	882	/* clear connection state */
donatien	0:b802fc31f1db	883	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
donatien	0:b802fc31f1db	884	sc->sc_state = PPPOE_STATE_INITIAL;
donatien	0:b802fc31f1db	885	}
donatien	0:b802fc31f1db	886
donatien	0:b802fc31f1db	887	/* Send a PADR packet */
donatien	0:b802fc31f1db	888	static err_t
donatien	0:b802fc31f1db	889	pppoe_send_padr(struct pppoe_softc *sc)
donatien	0:b802fc31f1db	890	{
donatien	0:b802fc31f1db	891	struct pbuf *pb;
donatien	0:b802fc31f1db	892	u8_t *p;
donatien	0:b802fc31f1db	893	size_t len;
donatien	0:b802fc31f1db	894	#ifdef PPPOE_TODO
donatien	0:b802fc31f1db	895	size_t l1 = 0; /* XXX: gcc */
donatien	0:b802fc31f1db	896	#endif /* PPPOE_TODO */
donatien	0:b802fc31f1db	897
donatien	0:b802fc31f1db	898	if (sc->sc_state != PPPOE_STATE_PADR_SENT) {
donatien	0:b802fc31f1db	899	return ERR_CONN;
donatien	0:b802fc31f1db	900	}
donatien	0:b802fc31f1db	901
donatien	0:b802fc31f1db	902	len = 2 + 2 + 2 + 2 + sizeof(sc); /* service name, host unique */
donatien	0:b802fc31f1db	903	#ifdef PPPOE_TODO
donatien	0:b802fc31f1db	904	if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
donatien	0:b802fc31f1db	905	l1 = strlen(sc->sc_service_name);
donatien	0:b802fc31f1db	906	len += l1;
donatien	0:b802fc31f1db	907	}
donatien	0:b802fc31f1db	908	#endif /* PPPOE_TODO */
donatien	0:b802fc31f1db	909	if (sc->sc_ac_cookie_len > 0) {
donatien	0:b802fc31f1db	910	len += 2 + 2 + sc->sc_ac_cookie_len; /* AC cookie */
donatien	0:b802fc31f1db	911	}
donatien	0:b802fc31f1db	912	LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
donatien	0:b802fc31f1db	913	sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
donatien	0:b802fc31f1db	914	pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
donatien	0:b802fc31f1db	915	if (!pb) {
donatien	0:b802fc31f1db	916	return ERR_MEM;
donatien	0:b802fc31f1db	917	}
donatien	0:b802fc31f1db	918	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
donatien	0:b802fc31f1db	919	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
donatien	0:b802fc31f1db	920	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADR, 0, len);
donatien	0:b802fc31f1db	921	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
donatien	0:b802fc31f1db	922	#ifdef PPPOE_TODO
donatien	0:b802fc31f1db	923	if (sc->sc_service_name != NULL) {
donatien	0:b802fc31f1db	924	PPPOE_ADD_16(p, l1);
donatien	0:b802fc31f1db	925	MEMCPY(p, sc->sc_service_name, l1);
donatien	0:b802fc31f1db	926	p += l1;
donatien	0:b802fc31f1db	927	} else
donatien	0:b802fc31f1db	928	#endif /* PPPOE_TODO */
donatien	0:b802fc31f1db	929	{
donatien	0:b802fc31f1db	930	PPPOE_ADD_16(p, 0);
donatien	0:b802fc31f1db	931	}
donatien	0:b802fc31f1db	932	if (sc->sc_ac_cookie_len > 0) {
donatien	0:b802fc31f1db	933	PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
donatien	0:b802fc31f1db	934	PPPOE_ADD_16(p, sc->sc_ac_cookie_len);
donatien	0:b802fc31f1db	935	MEMCPY(p, sc->sc_ac_cookie, sc->sc_ac_cookie_len);
donatien	0:b802fc31f1db	936	p += sc->sc_ac_cookie_len;
donatien	0:b802fc31f1db	937	}
donatien	0:b802fc31f1db	938	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
donatien	0:b802fc31f1db	939	PPPOE_ADD_16(p, sizeof(sc));
donatien	0:b802fc31f1db	940	MEMCPY(p, &sc, sizeof sc);
donatien	0:b802fc31f1db	941
donatien	0:b802fc31f1db	942	return pppoe_output(sc, pb);
donatien	0:b802fc31f1db	943	}
donatien	0:b802fc31f1db	944
donatien	0:b802fc31f1db	945	/* send a PADT packet */
donatien	0:b802fc31f1db	946	static err_t
donatien	0:b802fc31f1db	947	pppoe_send_padt(struct netif outgoing_if, u_int session, const u8_t dest)
donatien	0:b802fc31f1db	948	{
donatien	0:b802fc31f1db	949	struct pbuf *pb;
donatien	0:b802fc31f1db	950	struct eth_hdr *ethhdr;
donatien	0:b802fc31f1db	951	err_t res;
donatien	0:b802fc31f1db	952	u8_t *p;
donatien	0:b802fc31f1db	953
donatien	0:b802fc31f1db	954	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN, PBUF_RAM);
donatien	0:b802fc31f1db	955	if (!pb) {
donatien	0:b802fc31f1db	956	return ERR_MEM;
donatien	0:b802fc31f1db	957	}
donatien	0:b802fc31f1db	958	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
donatien	0:b802fc31f1db	959
donatien	0:b802fc31f1db	960	ethhdr = (struct eth_hdr *)pb->payload;
donatien	0:b802fc31f1db	961	ethhdr->type = PP_HTONS(ETHTYPE_PPPOEDISC);
donatien	0:b802fc31f1db	962	MEMCPY(ethhdr->dest.addr, dest, sizeof(ethhdr->dest.addr));
donatien	0:b802fc31f1db	963	MEMCPY(ethhdr->src.addr, ((struct eth_addr *)outgoing_if->hwaddr)->addr, sizeof(ethhdr->src.addr));
donatien	0:b802fc31f1db	964
donatien	0:b802fc31f1db	965	p = (u8_t*)(ethhdr + 1);
donatien	0:b802fc31f1db	966	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADT, session, 0);
donatien	0:b802fc31f1db	967
donatien	0:b802fc31f1db	968	res = outgoing_if->linkoutput(outgoing_if, pb);
donatien	0:b802fc31f1db	969
donatien	0:b802fc31f1db	970	pbuf_free(pb);
donatien	0:b802fc31f1db	971
donatien	0:b802fc31f1db	972	return res;
donatien	0:b802fc31f1db	973	}
donatien	0:b802fc31f1db	974
donatien	0:b802fc31f1db	975	#ifdef PPPOE_SERVER
donatien	0:b802fc31f1db	976	static err_t
donatien	0:b802fc31f1db	977	pppoe_send_pado(struct pppoe_softc *sc)
donatien	0:b802fc31f1db	978	{
donatien	0:b802fc31f1db	979	struct pbuf *pb;
donatien	0:b802fc31f1db	980	u8_t *p;
donatien	0:b802fc31f1db	981	size_t len;
donatien	0:b802fc31f1db	982
donatien	0:b802fc31f1db	983	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
donatien	0:b802fc31f1db	984	return ERR_CONN;
donatien	0:b802fc31f1db	985	}
donatien	0:b802fc31f1db	986
donatien	0:b802fc31f1db	987	/* calc length */
donatien	0:b802fc31f1db	988	len = 0;
donatien	0:b802fc31f1db	989	/* include ac_cookie */
donatien	0:b802fc31f1db	990	len += 2 + 2 + sizeof(sc);
donatien	0:b802fc31f1db	991	/* include hunique */
donatien	0:b802fc31f1db	992	len += 2 + 2 + sc->sc_hunique_len;
donatien	0:b802fc31f1db	993	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
donatien	0:b802fc31f1db	994	if (!pb) {
donatien	0:b802fc31f1db	995	return ERR_MEM;
donatien	0:b802fc31f1db	996	}
donatien	0:b802fc31f1db	997	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
donatien	0:b802fc31f1db	998	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
donatien	0:b802fc31f1db	999	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADO, 0, len);
donatien	0:b802fc31f1db	1000	PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
donatien	0:b802fc31f1db	1001	PPPOE_ADD_16(p, sizeof(sc));
donatien	0:b802fc31f1db	1002	MEMCPY(p, &sc, sizeof(sc));
donatien	0:b802fc31f1db	1003	p += sizeof(sc);
donatien	0:b802fc31f1db	1004	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
donatien	0:b802fc31f1db	1005	PPPOE_ADD_16(p, sc->sc_hunique_len);
donatien	0:b802fc31f1db	1006	MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
donatien	0:b802fc31f1db	1007	return pppoe_output(sc, pb);
donatien	0:b802fc31f1db	1008	}
donatien	0:b802fc31f1db	1009
donatien	0:b802fc31f1db	1010	static err_t
donatien	0:b802fc31f1db	1011	pppoe_send_pads(struct pppoe_softc *sc)
donatien	0:b802fc31f1db	1012	{
donatien	0:b802fc31f1db	1013	struct pbuf *pb;
donatien	0:b802fc31f1db	1014	u8_t *p;
donatien	0:b802fc31f1db	1015	size_t len, l1 = 0; /* XXX: gcc */
donatien	0:b802fc31f1db	1016
donatien	0:b802fc31f1db	1017	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
donatien	0:b802fc31f1db	1018	return ERR_CONN;
donatien	0:b802fc31f1db	1019	}
donatien	0:b802fc31f1db	1020
donatien	0:b802fc31f1db	1021	sc->sc_session = mono_time.tv_sec % 0xff + 1;
donatien	0:b802fc31f1db	1022	/* calc length */
donatien	0:b802fc31f1db	1023	len = 0;
donatien	0:b802fc31f1db	1024	/* include hunique */
donatien	0:b802fc31f1db	1025	len += 2 + 2 + 2 + 2 + sc->sc_hunique_len; /* service name, host unique*/
donatien	0:b802fc31f1db	1026	if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
donatien	0:b802fc31f1db	1027	l1 = strlen(sc->sc_service_name);
donatien	0:b802fc31f1db	1028	len += l1;
donatien	0:b802fc31f1db	1029	}
donatien	0:b802fc31f1db	1030	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
donatien	0:b802fc31f1db	1031	if (!pb) {
donatien	0:b802fc31f1db	1032	return ERR_MEM;
donatien	0:b802fc31f1db	1033	}
donatien	0:b802fc31f1db	1034	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
donatien	0:b802fc31f1db	1035	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
donatien	0:b802fc31f1db	1036	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADS, sc->sc_session, len);
donatien	0:b802fc31f1db	1037	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
donatien	0:b802fc31f1db	1038	if (sc->sc_service_name != NULL) {
donatien	0:b802fc31f1db	1039	PPPOE_ADD_16(p, l1);
donatien	0:b802fc31f1db	1040	MEMCPY(p, sc->sc_service_name, l1);
donatien	0:b802fc31f1db	1041	p += l1;
donatien	0:b802fc31f1db	1042	} else {
donatien	0:b802fc31f1db	1043	PPPOE_ADD_16(p, 0);
donatien	0:b802fc31f1db	1044	}
donatien	0:b802fc31f1db	1045	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
donatien	0:b802fc31f1db	1046	PPPOE_ADD_16(p, sc->sc_hunique_len);
donatien	0:b802fc31f1db	1047	MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
donatien	0:b802fc31f1db	1048	return pppoe_output(sc, pb);
donatien	0:b802fc31f1db	1049	}
donatien	0:b802fc31f1db	1050	#endif
donatien	0:b802fc31f1db	1051
donatien	0:b802fc31f1db	1052	err_t
donatien	0:b802fc31f1db	1053	pppoe_xmit(struct pppoe_softc sc, struct pbuf pb)
donatien	0:b802fc31f1db	1054	{
donatien	0:b802fc31f1db	1055	u8_t *p;
donatien	0:b802fc31f1db	1056	size_t len;
donatien	0:b802fc31f1db	1057
donatien	0:b802fc31f1db	1058	/* are we ready to process data yet? */
donatien	0:b802fc31f1db	1059	if (sc->sc_state < PPPOE_STATE_SESSION) {
donatien	0:b802fc31f1db	1060	/sppp_flush(&sc->sc_sppp.pp_if);/
donatien	0:b802fc31f1db	1061	pbuf_free(pb);
donatien	0:b802fc31f1db	1062	return ERR_CONN;
donatien	0:b802fc31f1db	1063	}
donatien	0:b802fc31f1db	1064
donatien	0:b802fc31f1db	1065	len = pb->tot_len;
donatien	0:b802fc31f1db	1066
donatien	0:b802fc31f1db	1067	/* make room for Ethernet header - should not fail */
donatien	0:b802fc31f1db	1068	if (pbuf_header(pb, sizeof(struct eth_hdr) + PPPOE_HEADERLEN) != 0) {
donatien	0:b802fc31f1db	1069	/* bail out */
donatien	0:b802fc31f1db	1070	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:b802fc31f1db	1071	LINK_STATS_INC(link.lenerr);
donatien	0:b802fc31f1db	1072	pbuf_free(pb);
donatien	0:b802fc31f1db	1073	return ERR_BUF;
donatien	0:b802fc31f1db	1074	}
donatien	0:b802fc31f1db	1075
donatien	0:b802fc31f1db	1076	p = (u8_t*)pb->payload + sizeof(struct eth_hdr);
donatien	0:b802fc31f1db	1077	PPPOE_ADD_HEADER(p, 0, sc->sc_session, len);
donatien	0:b802fc31f1db	1078
donatien	0:b802fc31f1db	1079	return pppoe_output(sc, pb);
donatien	0:b802fc31f1db	1080	}
donatien	0:b802fc31f1db	1081
donatien	0:b802fc31f1db	1082	#if 0 /def PFIL_HOOKS/
donatien	0:b802fc31f1db	1083	static int
donatien	0:b802fc31f1db	1084	pppoe_ifattach_hook(void arg, struct pbuf mp, struct netif ifp, int dir)
donatien	0:b802fc31f1db	1085	{
donatien	0:b802fc31f1db	1086	struct pppoe_softc *sc;
donatien	0:b802fc31f1db	1087	int s;
donatien	0:b802fc31f1db	1088
donatien	0:b802fc31f1db	1089	if (mp != (struct pbuf **)PFIL_IFNET_DETACH) {
donatien	0:b802fc31f1db	1090	return 0;
donatien	0:b802fc31f1db	1091	}
donatien	0:b802fc31f1db	1092
donatien	0:b802fc31f1db	1093	LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
donatien	0:b802fc31f1db	1094	if (sc->sc_ethif != ifp) {
donatien	0:b802fc31f1db	1095	continue;
donatien	0:b802fc31f1db	1096	}
donatien	0:b802fc31f1db	1097	if (sc->sc_sppp.pp_if.if_flags & IFF_UP) {
donatien	0:b802fc31f1db	1098	sc->sc_sppp.pp_if.if_flags &= ~(IFF_UP\|IFF_RUNNING);
donatien	0:b802fc31f1db	1099	printf("%c%c%"U16_F": ethernet interface detached, going down\n",
donatien	0:b802fc31f1db	1100	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
donatien	0:b802fc31f1db	1101	}
donatien	0:b802fc31f1db	1102	sc->sc_ethif = NULL;
donatien	0:b802fc31f1db	1103	pppoe_clear_softc(sc, "ethernet interface detached");
donatien	0:b802fc31f1db	1104	}
donatien	0:b802fc31f1db	1105
donatien	0:b802fc31f1db	1106	return 0;
donatien	0:b802fc31f1db	1107	}
donatien	0:b802fc31f1db	1108	#endif
donatien	0:b802fc31f1db	1109
donatien	0:b802fc31f1db	1110	static void
donatien	0:b802fc31f1db	1111	pppoe_clear_softc(struct pppoe_softc sc, const char message)
donatien	0:b802fc31f1db	1112	{
donatien	0:b802fc31f1db	1113	LWIP_UNUSED_ARG(message);
donatien	0:b802fc31f1db	1114
donatien	0:b802fc31f1db	1115	/* stop timer */
donatien	0:b802fc31f1db	1116	sys_untimeout(pppoe_timeout, sc);
donatien	0:b802fc31f1db	1117	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:b802fc31f1db	1118
donatien	0:b802fc31f1db	1119	/* fix our state */
donatien	0:b802fc31f1db	1120	sc->sc_state = PPPOE_STATE_INITIAL;
donatien	0:b802fc31f1db	1121
donatien	0:b802fc31f1db	1122	/* notify upper layers */
donatien	0:b802fc31f1db	1123	sc->sc_linkStatusCB(sc->sc_pd, 0);
donatien	0:b802fc31f1db	1124
donatien	0:b802fc31f1db	1125	/* clean up softc */
donatien	0:b802fc31f1db	1126	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
donatien	0:b802fc31f1db	1127	sc->sc_ac_cookie_len = 0;
donatien	0:b802fc31f1db	1128	sc->sc_session = 0;
donatien	0:b802fc31f1db	1129	}
donatien	0:b802fc31f1db	1130
donatien	0:b802fc31f1db	1131	#endif /* PPPOE_SUPPORT */
donatien	0:b802fc31f1db	1132

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Type:	Program
Created:	09 Jul 2010
Imports:	20
Forks:	0
Commits:	5
Dependents:	0
Dependencies:	0
Followers:	3

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lwip/netif/ppp/ppp_oe.c@0:b802fc31f1db, 2010-07-09 (annotated)

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