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NetServices/lwip/netif/ppp/ppp_oe.c@0:d9266031f832, 2011-10-13 (annotated)

Committer:: mafischl
Date:: Thu Oct 13 17:02:29 2011 +0000
Revision:: 0:d9266031f832

Who changed what in which revision?

User	Revision	Line number	New contents of line
mafischl	0:d9266031f832	1	/*****************************************************************************
mafischl	0:d9266031f832	2	* ppp_oe.c - PPP Over Ethernet implementation for lwIP.
mafischl	0:d9266031f832	3	*
mafischl	0:d9266031f832	4	* Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc.
mafischl	0:d9266031f832	5	*
mafischl	0:d9266031f832	6	* The authors hereby grant permission to use, copy, modify, distribute,
mafischl	0:d9266031f832	7	* and license this software and its documentation for any purpose, provided
mafischl	0:d9266031f832	8	* that existing copyright notices are retained in all copies and that this
mafischl	0:d9266031f832	9	* notice and the following disclaimer are included verbatim in any
mafischl	0:d9266031f832	10	* distributions. No written agreement, license, or royalty fee is required
mafischl	0:d9266031f832	11	* for any of the authorized uses.
mafischl	0:d9266031f832	12	*
mafischl	0:d9266031f832	13	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
mafischl	0:d9266031f832	14	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
mafischl	0:d9266031f832	15	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
mafischl	0:d9266031f832	16	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
mafischl	0:d9266031f832	17	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
mafischl	0:d9266031f832	18	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
mafischl	0:d9266031f832	19	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
mafischl	0:d9266031f832	20	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
mafischl	0:d9266031f832	21	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
mafischl	0:d9266031f832	22	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mafischl	0:d9266031f832	23	*
mafischl	0:d9266031f832	24	******************************************************************************
mafischl	0:d9266031f832	25	* REVISION HISTORY
mafischl	0:d9266031f832	26	*
mafischl	0:d9266031f832	27	* 06-01-01 Marc Boucher <marc@mbsi.ca>
mafischl	0:d9266031f832	28	* Ported to lwIP.
mafischl	0:d9266031f832	29	*****************************************************************************/
mafischl	0:d9266031f832	30
mafischl	0:d9266031f832	31
mafischl	0:d9266031f832	32
mafischl	0:d9266031f832	33	/* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */
mafischl	0:d9266031f832	34
mafischl	0:d9266031f832	35	/*-
mafischl	0:d9266031f832	36	* Copyright (c) 2002 The NetBSD Foundation, Inc.
mafischl	0:d9266031f832	37	* All rights reserved.
mafischl	0:d9266031f832	38	*
mafischl	0:d9266031f832	39	* This code is derived from software contributed to The NetBSD Foundation
mafischl	0:d9266031f832	40	* by Martin Husemann <martin@NetBSD.org>.
mafischl	0:d9266031f832	41	*
mafischl	0:d9266031f832	42	* Redistribution and use in source and binary forms, with or without
mafischl	0:d9266031f832	43	* modification, are permitted provided that the following conditions
mafischl	0:d9266031f832	44	* are met:
mafischl	0:d9266031f832	45	* 1. Redistributions of source code must retain the above copyright
mafischl	0:d9266031f832	46	* notice, this list of conditions and the following disclaimer.
mafischl	0:d9266031f832	47	* 2. Redistributions in binary form must reproduce the above copyright
mafischl	0:d9266031f832	48	* notice, this list of conditions and the following disclaimer in the
mafischl	0:d9266031f832	49	* documentation and/or other materials provided with the distribution.
mafischl	0:d9266031f832	50	* 3. All advertising materials mentioning features or use of this software
mafischl	0:d9266031f832	51	* must display the following acknowledgement:
mafischl	0:d9266031f832	52	* This product includes software developed by the NetBSD
mafischl	0:d9266031f832	53	* Foundation, Inc. and its contributors.
mafischl	0:d9266031f832	54	* 4. Neither the name of The NetBSD Foundation nor the names of its
mafischl	0:d9266031f832	55	* contributors may be used to endorse or promote products derived
mafischl	0:d9266031f832	56	* from this software without specific prior written permission.
mafischl	0:d9266031f832	57	*
mafischl	0:d9266031f832	58	* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
mafischl	0:d9266031f832	59	* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
mafischl	0:d9266031f832	60	* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
mafischl	0:d9266031f832	61	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
mafischl	0:d9266031f832	62	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
mafischl	0:d9266031f832	63	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
mafischl	0:d9266031f832	64	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mafischl	0:d9266031f832	65	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mafischl	0:d9266031f832	66	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
mafischl	0:d9266031f832	67	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mafischl	0:d9266031f832	68	* POSSIBILITY OF SUCH DAMAGE.
mafischl	0:d9266031f832	69	*/
mafischl	0:d9266031f832	70
mafischl	0:d9266031f832	71	#include "lwip/opt.h"
mafischl	0:d9266031f832	72
mafischl	0:d9266031f832	73	#if PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */
mafischl	0:d9266031f832	74
mafischl	0:d9266031f832	75	#include "netif/ppp_oe.h"
mafischl	0:d9266031f832	76
mafischl	0:d9266031f832	77	#include "ppp.h"
mafischl	0:d9266031f832	78	#include "pppdebug.h"
mafischl	0:d9266031f832	79
mafischl	0:d9266031f832	80	#include "lwip/timers.h"
mafischl	0:d9266031f832	81	#include "lwip/memp.h"
mafischl	0:d9266031f832	82
mafischl	0:d9266031f832	83	#include <string.h>
mafischl	0:d9266031f832	84	#include <stdio.h>
mafischl	0:d9266031f832	85
mafischl	0:d9266031f832	86
mafischl	0:d9266031f832	87	/* Add a 16 bit unsigned value to a buffer pointed to by PTR */
mafischl	0:d9266031f832	88	#define PPPOE_ADD_16(PTR, VAL) \
mafischl	0:d9266031f832	89	*(PTR)++ = (u8_t)((VAL) / 256); \
mafischl	0:d9266031f832	90	*(PTR)++ = (u8_t)((VAL) % 256)
mafischl	0:d9266031f832	91
mafischl	0:d9266031f832	92	/* Add a complete PPPoE header to the buffer pointed to by PTR */
mafischl	0:d9266031f832	93	#define PPPOE_ADD_HEADER(PTR, CODE, SESS, LEN) \
mafischl	0:d9266031f832	94	*(PTR)++ = PPPOE_VERTYPE; \
mafischl	0:d9266031f832	95	*(PTR)++ = (CODE); \
mafischl	0:d9266031f832	96	PPPOE_ADD_16(PTR, SESS); \
mafischl	0:d9266031f832	97	PPPOE_ADD_16(PTR, LEN)
mafischl	0:d9266031f832	98
mafischl	0:d9266031f832	99	#define PPPOE_DISC_TIMEOUT (51000) / base for quick timeout calculation */
mafischl	0:d9266031f832	100	#define PPPOE_SLOW_RETRY (601000) / persistent retry interval */
mafischl	0:d9266031f832	101	#define PPPOE_DISC_MAXPADI 4 /* retry PADI four times (quickly) */
mafischl	0:d9266031f832	102	#define PPPOE_DISC_MAXPADR 2 /* retry PADR twice */
mafischl	0:d9266031f832	103
mafischl	0:d9266031f832	104	#ifdef PPPOE_SERVER
mafischl	0:d9266031f832	105	#error "PPPOE_SERVER is not yet supported under lwIP!"
mafischl	0:d9266031f832	106	/* from if_spppsubr.c */
mafischl	0:d9266031f832	107	#define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
mafischl	0:d9266031f832	108	#endif
mafischl	0:d9266031f832	109
mafischl	0:d9266031f832	110	#ifndef PPPOE_ERRORSTRING_LEN
mafischl	0:d9266031f832	111	#define PPPOE_ERRORSTRING_LEN 64
mafischl	0:d9266031f832	112	#endif
mafischl	0:d9266031f832	113	static char pppoe_error_tmp[PPPOE_ERRORSTRING_LEN];
mafischl	0:d9266031f832	114
mafischl	0:d9266031f832	115
mafischl	0:d9266031f832	116	/* input routines */
mafischl	0:d9266031f832	117	static void pppoe_dispatch_disc_pkt(struct netif , struct pbuf );
mafischl	0:d9266031f832	118
mafischl	0:d9266031f832	119	/* management routines */
mafischl	0:d9266031f832	120	static int pppoe_do_disconnect(struct pppoe_softc *);
mafischl	0:d9266031f832	121	static void pppoe_abort_connect(struct pppoe_softc *);
mafischl	0:d9266031f832	122	static void pppoe_clear_softc(struct pppoe_softc , const char );
mafischl	0:d9266031f832	123
mafischl	0:d9266031f832	124	/* internal timeout handling */
mafischl	0:d9266031f832	125	static void pppoe_timeout(void *);
mafischl	0:d9266031f832	126
mafischl	0:d9266031f832	127	/* sending actual protocol controll packets */
mafischl	0:d9266031f832	128	static err_t pppoe_send_padi(struct pppoe_softc *);
mafischl	0:d9266031f832	129	static err_t pppoe_send_padr(struct pppoe_softc *);
mafischl	0:d9266031f832	130	#ifdef PPPOE_SERVER
mafischl	0:d9266031f832	131	static err_t pppoe_send_pado(struct pppoe_softc *);
mafischl	0:d9266031f832	132	static err_t pppoe_send_pads(struct pppoe_softc *);
mafischl	0:d9266031f832	133	#endif
mafischl	0:d9266031f832	134	static err_t pppoe_send_padt(struct netif , u_int, const u8_t );
mafischl	0:d9266031f832	135
mafischl	0:d9266031f832	136	/* internal helper functions */
mafischl	0:d9266031f832	137	static struct pppoe_softc * pppoe_find_softc_by_session(u_int, struct netif *);
mafischl	0:d9266031f832	138	static struct pppoe_softc * pppoe_find_softc_by_hunique(u8_t , size_t, struct netif );
mafischl	0:d9266031f832	139
mafischl	0:d9266031f832	140	/** linked list of created pppoe interfaces */
mafischl	0:d9266031f832	141	static struct pppoe_softc *pppoe_softc_list;
mafischl	0:d9266031f832	142
mafischl	0:d9266031f832	143	err_t
mafischl	0:d9266031f832	144	pppoe_create(struct netif ethif, int pd, void (linkStatusCB)(int pd, int up), struct pppoe_softc **scptr)
mafischl	0:d9266031f832	145	{
mafischl	0:d9266031f832	146	struct pppoe_softc *sc;
mafischl	0:d9266031f832	147
mafischl	0:d9266031f832	148	sc = (struct pppoe_softc *)memp_malloc(MEMP_PPPOE_IF);
mafischl	0:d9266031f832	149	if (sc == NULL) {
mafischl	0:d9266031f832	150	*scptr = NULL;
mafischl	0:d9266031f832	151	return ERR_MEM;
mafischl	0:d9266031f832	152	}
mafischl	0:d9266031f832	153	memset(sc, 0, sizeof(struct pppoe_softc));
mafischl	0:d9266031f832	154
mafischl	0:d9266031f832	155	/* changed to real address later */
mafischl	0:d9266031f832	156	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
mafischl	0:d9266031f832	157
mafischl	0:d9266031f832	158	sc->sc_pd = pd;
mafischl	0:d9266031f832	159	sc->sc_linkStatusCB = linkStatusCB;
mafischl	0:d9266031f832	160	sc->sc_ethif = ethif;
mafischl	0:d9266031f832	161
mafischl	0:d9266031f832	162	/* put the new interface at the head of the list */
mafischl	0:d9266031f832	163	sc->next = pppoe_softc_list;
mafischl	0:d9266031f832	164	pppoe_softc_list = sc;
mafischl	0:d9266031f832	165
mafischl	0:d9266031f832	166	*scptr = sc;
mafischl	0:d9266031f832	167
mafischl	0:d9266031f832	168	return ERR_OK;
mafischl	0:d9266031f832	169	}
mafischl	0:d9266031f832	170
mafischl	0:d9266031f832	171	err_t
mafischl	0:d9266031f832	172	pppoe_destroy(struct netif *ifp)
mafischl	0:d9266031f832	173	{
mafischl	0:d9266031f832	174	struct pppoe_softc sc, prev = NULL;
mafischl	0:d9266031f832	175
mafischl	0:d9266031f832	176	for (sc = pppoe_softc_list; sc != NULL; prev = sc, sc = sc->next) {
mafischl	0:d9266031f832	177	if (sc->sc_ethif == ifp) {
mafischl	0:d9266031f832	178	break;
mafischl	0:d9266031f832	179	}
mafischl	0:d9266031f832	180	}
mafischl	0:d9266031f832	181
mafischl	0:d9266031f832	182	if(!(sc && (sc->sc_ethif == ifp))) {
mafischl	0:d9266031f832	183	return ERR_IF;
mafischl	0:d9266031f832	184	}
mafischl	0:d9266031f832	185
mafischl	0:d9266031f832	186	sys_untimeout(pppoe_timeout, sc);
mafischl	0:d9266031f832	187	if (prev == NULL) {
mafischl	0:d9266031f832	188	/* remove sc from the head of the list */
mafischl	0:d9266031f832	189	pppoe_softc_list = sc->next;
mafischl	0:d9266031f832	190	} else {
mafischl	0:d9266031f832	191	/* remove sc from the list */
mafischl	0:d9266031f832	192	prev->next = sc->next;
mafischl	0:d9266031f832	193	}
mafischl	0:d9266031f832	194
mafischl	0:d9266031f832	195	#ifdef PPPOE_TODO
mafischl	0:d9266031f832	196	if (sc->sc_concentrator_name) {
mafischl	0:d9266031f832	197	mem_free(sc->sc_concentrator_name);
mafischl	0:d9266031f832	198	}
mafischl	0:d9266031f832	199	if (sc->sc_service_name) {
mafischl	0:d9266031f832	200	mem_free(sc->sc_service_name);
mafischl	0:d9266031f832	201	}
mafischl	0:d9266031f832	202	#endif /* PPPOE_TODO */
mafischl	0:d9266031f832	203	memp_free(MEMP_PPPOE_IF, sc);
mafischl	0:d9266031f832	204
mafischl	0:d9266031f832	205	return ERR_OK;
mafischl	0:d9266031f832	206	}
mafischl	0:d9266031f832	207
mafischl	0:d9266031f832	208	/*
mafischl	0:d9266031f832	209	* Find the interface handling the specified session.
mafischl	0:d9266031f832	210	* Note: O(number of sessions open), this is a client-side only, mean
mafischl	0:d9266031f832	211	* and lean implementation, so number of open sessions typically should
mafischl	0:d9266031f832	212	* be 1.
mafischl	0:d9266031f832	213	*/
mafischl	0:d9266031f832	214	static struct pppoe_softc *
mafischl	0:d9266031f832	215	pppoe_find_softc_by_session(u_int session, struct netif *rcvif)
mafischl	0:d9266031f832	216	{
mafischl	0:d9266031f832	217	struct pppoe_softc *sc;
mafischl	0:d9266031f832	218
mafischl	0:d9266031f832	219	if (session == 0) {
mafischl	0:d9266031f832	220	return NULL;
mafischl	0:d9266031f832	221	}
mafischl	0:d9266031f832	222
mafischl	0:d9266031f832	223	for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
mafischl	0:d9266031f832	224	if (sc->sc_state == PPPOE_STATE_SESSION
mafischl	0:d9266031f832	225	&& sc->sc_session == session) {
mafischl	0:d9266031f832	226	if (sc->sc_ethif == rcvif) {
mafischl	0:d9266031f832	227	return sc;
mafischl	0:d9266031f832	228	} else {
mafischl	0:d9266031f832	229	return NULL;
mafischl	0:d9266031f832	230	}
mafischl	0:d9266031f832	231	}
mafischl	0:d9266031f832	232	}
mafischl	0:d9266031f832	233	return NULL;
mafischl	0:d9266031f832	234	}
mafischl	0:d9266031f832	235
mafischl	0:d9266031f832	236	/* Check host unique token passed and return appropriate softc pointer,
mafischl	0:d9266031f832	237	* or NULL if token is bogus. */
mafischl	0:d9266031f832	238	static struct pppoe_softc *
mafischl	0:d9266031f832	239	pppoe_find_softc_by_hunique(u8_t token, size_t len, struct netif rcvif)
mafischl	0:d9266031f832	240	{
mafischl	0:d9266031f832	241	struct pppoe_softc sc, t;
mafischl	0:d9266031f832	242
mafischl	0:d9266031f832	243	if (pppoe_softc_list == NULL) {
mafischl	0:d9266031f832	244	return NULL;
mafischl	0:d9266031f832	245	}
mafischl	0:d9266031f832	246
mafischl	0:d9266031f832	247	if (len != sizeof sc) {
mafischl	0:d9266031f832	248	return NULL;
mafischl	0:d9266031f832	249	}
mafischl	0:d9266031f832	250	MEMCPY(&t, token, len);
mafischl	0:d9266031f832	251
mafischl	0:d9266031f832	252	for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
mafischl	0:d9266031f832	253	if (sc == t) {
mafischl	0:d9266031f832	254	break;
mafischl	0:d9266031f832	255	}
mafischl	0:d9266031f832	256	}
mafischl	0:d9266031f832	257
mafischl	0:d9266031f832	258	if (sc == NULL) {
mafischl	0:d9266031f832	259	PPPDEBUG(LOG_DEBUG, ("pppoe: alien host unique tag, no session found\n"));
mafischl	0:d9266031f832	260	return NULL;
mafischl	0:d9266031f832	261	}
mafischl	0:d9266031f832	262
mafischl	0:d9266031f832	263	/* should be safe to access sc now /
mafischl	0:d9266031f832	264	if (sc->sc_state < PPPOE_STATE_PADI_SENT \|\| sc->sc_state >= PPPOE_STATE_SESSION) {
mafischl	0:d9266031f832	265	printf("%c%c%"U16_F": host unique tag found, but it belongs to a connection in state %d\n",
mafischl	0:d9266031f832	266	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_state);
mafischl	0:d9266031f832	267	return NULL;
mafischl	0:d9266031f832	268	}
mafischl	0:d9266031f832	269	if (sc->sc_ethif != rcvif) {
mafischl	0:d9266031f832	270	printf("%c%c%"U16_F": wrong interface, not accepting host unique\n",
mafischl	0:d9266031f832	271	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
mafischl	0:d9266031f832	272	return NULL;
mafischl	0:d9266031f832	273	}
mafischl	0:d9266031f832	274	return sc;
mafischl	0:d9266031f832	275	}
mafischl	0:d9266031f832	276
mafischl	0:d9266031f832	277	static void
mafischl	0:d9266031f832	278	pppoe_linkstatus_up(struct pppoe_softc *sc)
mafischl	0:d9266031f832	279	{
mafischl	0:d9266031f832	280	sc->sc_linkStatusCB(sc->sc_pd, 1);
mafischl	0:d9266031f832	281	}
mafischl	0:d9266031f832	282
mafischl	0:d9266031f832	283	/* analyze and handle a single received packet while not in session state */
mafischl	0:d9266031f832	284	static void
mafischl	0:d9266031f832	285	pppoe_dispatch_disc_pkt(struct netif netif, struct pbuf pb)
mafischl	0:d9266031f832	286	{
mafischl	0:d9266031f832	287	u16_t tag, len;
mafischl	0:d9266031f832	288	u16_t session, plen;
mafischl	0:d9266031f832	289	struct pppoe_softc *sc;
mafischl	0:d9266031f832	290	const char *err_msg;
mafischl	0:d9266031f832	291	char devname[6];
mafischl	0:d9266031f832	292	u8_t *ac_cookie;
mafischl	0:d9266031f832	293	u16_t ac_cookie_len;
mafischl	0:d9266031f832	294	#ifdef PPPOE_SERVER
mafischl	0:d9266031f832	295	u8_t *hunique;
mafischl	0:d9266031f832	296	size_t hunique_len;
mafischl	0:d9266031f832	297	#endif
mafischl	0:d9266031f832	298	struct pppoehdr *ph;
mafischl	0:d9266031f832	299	struct pppoetag pt;
mafischl	0:d9266031f832	300	int off, err, errortag;
mafischl	0:d9266031f832	301	struct eth_hdr *ethhdr;
mafischl	0:d9266031f832	302
mafischl	0:d9266031f832	303	pb = pppSingleBuf(pb);
mafischl	0:d9266031f832	304
mafischl	0:d9266031f832	305	strcpy(devname, "pppoe"); /* as long as we don't know which instance */
mafischl	0:d9266031f832	306	err_msg = NULL;
mafischl	0:d9266031f832	307	errortag = 0;
mafischl	0:d9266031f832	308	if (pb->len < sizeof(*ethhdr)) {
mafischl	0:d9266031f832	309	goto done;
mafischl	0:d9266031f832	310	}
mafischl	0:d9266031f832	311	ethhdr = (struct eth_hdr *)pb->payload;
mafischl	0:d9266031f832	312	off = sizeof(*ethhdr);
mafischl	0:d9266031f832	313
mafischl	0:d9266031f832	314	ac_cookie = NULL;
mafischl	0:d9266031f832	315	ac_cookie_len = 0;
mafischl	0:d9266031f832	316	#ifdef PPPOE_SERVER
mafischl	0:d9266031f832	317	hunique = NULL;
mafischl	0:d9266031f832	318	hunique_len = 0;
mafischl	0:d9266031f832	319	#endif
mafischl	0:d9266031f832	320	session = 0;
mafischl	0:d9266031f832	321	if (pb->len - off < PPPOE_HEADERLEN) {
mafischl	0:d9266031f832	322	printf("pppoe: packet too short: %d\n", pb->len);
mafischl	0:d9266031f832	323	goto done;
mafischl	0:d9266031f832	324	}
mafischl	0:d9266031f832	325
mafischl	0:d9266031f832	326	ph = (struct pppoehdr *) (ethhdr + 1);
mafischl	0:d9266031f832	327	if (ph->vertype != PPPOE_VERTYPE) {
mafischl	0:d9266031f832	328	printf("pppoe: unknown version/type packet: 0x%x\n", ph->vertype);
mafischl	0:d9266031f832	329	goto done;
mafischl	0:d9266031f832	330	}
mafischl	0:d9266031f832	331	session = ntohs(ph->session);
mafischl	0:d9266031f832	332	plen = ntohs(ph->plen);
mafischl	0:d9266031f832	333	off += sizeof(*ph);
mafischl	0:d9266031f832	334
mafischl	0:d9266031f832	335	if (plen + off > pb->len) {
mafischl	0:d9266031f832	336	printf("pppoe: packet content does not fit: data available = %d, packet size = %u\n",
mafischl	0:d9266031f832	337	pb->len - off, plen);
mafischl	0:d9266031f832	338	goto done;
mafischl	0:d9266031f832	339	}
mafischl	0:d9266031f832	340	if(pb->tot_len == pb->len) {
mafischl	0:d9266031f832	341	pb->tot_len = pb->len = (u16_t)off + plen; /* ignore trailing garbage */
mafischl	0:d9266031f832	342	}
mafischl	0:d9266031f832	343	tag = 0;
mafischl	0:d9266031f832	344	len = 0;
mafischl	0:d9266031f832	345	sc = NULL;
mafischl	0:d9266031f832	346	while (off + sizeof(pt) <= pb->len) {
mafischl	0:d9266031f832	347	MEMCPY(&pt, (u8_t*)pb->payload + off, sizeof(pt));
mafischl	0:d9266031f832	348	tag = ntohs(pt.tag);
mafischl	0:d9266031f832	349	len = ntohs(pt.len);
mafischl	0:d9266031f832	350	if (off + sizeof(pt) + len > pb->len) {
mafischl	0:d9266031f832	351	printf("pppoe: tag 0x%x len 0x%x is too long\n", tag, len);
mafischl	0:d9266031f832	352	goto done;
mafischl	0:d9266031f832	353	}
mafischl	0:d9266031f832	354	switch (tag) {
mafischl	0:d9266031f832	355	case PPPOE_TAG_EOL:
mafischl	0:d9266031f832	356	goto breakbreak;
mafischl	0:d9266031f832	357	case PPPOE_TAG_SNAME:
mafischl	0:d9266031f832	358	break; /* ignored */
mafischl	0:d9266031f832	359	case PPPOE_TAG_ACNAME:
mafischl	0:d9266031f832	360	break; /* ignored */
mafischl	0:d9266031f832	361	case PPPOE_TAG_HUNIQUE:
mafischl	0:d9266031f832	362	if (sc != NULL) {
mafischl	0:d9266031f832	363	break;
mafischl	0:d9266031f832	364	}
mafischl	0:d9266031f832	365	#ifdef PPPOE_SERVER
mafischl	0:d9266031f832	366	hunique = (u8_t*)pb->payload + off + sizeof(pt);
mafischl	0:d9266031f832	367	hunique_len = len;
mafischl	0:d9266031f832	368	#endif
mafischl	0:d9266031f832	369	sc = pppoe_find_softc_by_hunique((u8_t*)pb->payload + off + sizeof(pt), len, netif);
mafischl	0:d9266031f832	370	if (sc != NULL) {
mafischl	0:d9266031f832	371	snprintf(devname, sizeof(devname), "%c%c%"U16_F, sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
mafischl	0:d9266031f832	372	}
mafischl	0:d9266031f832	373	break;
mafischl	0:d9266031f832	374	case PPPOE_TAG_ACCOOKIE:
mafischl	0:d9266031f832	375	if (ac_cookie == NULL) {
mafischl	0:d9266031f832	376	ac_cookie = (u8_t*)pb->payload + off + sizeof(pt);
mafischl	0:d9266031f832	377	ac_cookie_len = len;
mafischl	0:d9266031f832	378	}
mafischl	0:d9266031f832	379	break;
mafischl	0:d9266031f832	380	case PPPOE_TAG_SNAME_ERR:
mafischl	0:d9266031f832	381	err_msg = "SERVICE NAME ERROR";
mafischl	0:d9266031f832	382	errortag = 1;
mafischl	0:d9266031f832	383	break;
mafischl	0:d9266031f832	384	case PPPOE_TAG_ACSYS_ERR:
mafischl	0:d9266031f832	385	err_msg = "AC SYSTEM ERROR";
mafischl	0:d9266031f832	386	errortag = 1;
mafischl	0:d9266031f832	387	break;
mafischl	0:d9266031f832	388	case PPPOE_TAG_GENERIC_ERR:
mafischl	0:d9266031f832	389	err_msg = "GENERIC ERROR";
mafischl	0:d9266031f832	390	errortag = 1;
mafischl	0:d9266031f832	391	break;
mafischl	0:d9266031f832	392	}
mafischl	0:d9266031f832	393	if (err_msg) {
mafischl	0:d9266031f832	394	if (errortag && len) {
mafischl	0:d9266031f832	395	u16_t error_len = LWIP_MIN(len, sizeof(pppoe_error_tmp)-1);
mafischl	0:d9266031f832	396	strncpy(pppoe_error_tmp, (char*)pb->payload + off + sizeof(pt), error_len);
mafischl	0:d9266031f832	397	pppoe_error_tmp[error_len-1] = '\0';
mafischl	0:d9266031f832	398	printf("%s: %s: %s\n", devname, err_msg, pppoe_error_tmp);
mafischl	0:d9266031f832	399	} else {
mafischl	0:d9266031f832	400	printf("%s: %s\n", devname, err_msg);
mafischl	0:d9266031f832	401	}
mafischl	0:d9266031f832	402	if (errortag) {
mafischl	0:d9266031f832	403	goto done;
mafischl	0:d9266031f832	404	}
mafischl	0:d9266031f832	405	}
mafischl	0:d9266031f832	406	off += sizeof(pt) + len;
mafischl	0:d9266031f832	407	}
mafischl	0:d9266031f832	408
mafischl	0:d9266031f832	409	breakbreak:;
mafischl	0:d9266031f832	410	switch (ph->code) {
mafischl	0:d9266031f832	411	case PPPOE_CODE_PADI:
mafischl	0:d9266031f832	412	#ifdef PPPOE_SERVER
mafischl	0:d9266031f832	413	/*
mafischl	0:d9266031f832	414	* got service name, concentrator name, and/or host unique.
mafischl	0:d9266031f832	415	* ignore if we have no interfaces with IFF_PASSIVE\|IFF_UP.
mafischl	0:d9266031f832	416	*/
mafischl	0:d9266031f832	417	if (LIST_EMPTY(&pppoe_softc_list)) {
mafischl	0:d9266031f832	418	goto done;
mafischl	0:d9266031f832	419	}
mafischl	0:d9266031f832	420	LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
mafischl	0:d9266031f832	421	if (!(sc->sc_sppp.pp_if.if_flags & IFF_UP)) {
mafischl	0:d9266031f832	422	continue;
mafischl	0:d9266031f832	423	}
mafischl	0:d9266031f832	424	if (!(sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
mafischl	0:d9266031f832	425	continue;
mafischl	0:d9266031f832	426	}
mafischl	0:d9266031f832	427	if (sc->sc_state == PPPOE_STATE_INITIAL) {
mafischl	0:d9266031f832	428	break;
mafischl	0:d9266031f832	429	}
mafischl	0:d9266031f832	430	}
mafischl	0:d9266031f832	431	if (sc == NULL) {
mafischl	0:d9266031f832	432	/* printf("pppoe: free passive interface is not found\n"); */
mafischl	0:d9266031f832	433	goto done;
mafischl	0:d9266031f832	434	}
mafischl	0:d9266031f832	435	if (hunique) {
mafischl	0:d9266031f832	436	if (sc->sc_hunique) {
mafischl	0:d9266031f832	437	mem_free(sc->sc_hunique);
mafischl	0:d9266031f832	438	}
mafischl	0:d9266031f832	439	sc->sc_hunique = mem_malloc(hunique_len);
mafischl	0:d9266031f832	440	if (sc->sc_hunique == NULL) {
mafischl	0:d9266031f832	441	goto done;
mafischl	0:d9266031f832	442	}
mafischl	0:d9266031f832	443	sc->sc_hunique_len = hunique_len;
mafischl	0:d9266031f832	444	MEMCPY(sc->sc_hunique, hunique, hunique_len);
mafischl	0:d9266031f832	445	}
mafischl	0:d9266031f832	446	MEMCPY(&sc->sc_dest, eh->ether_shost, sizeof sc->sc_dest);
mafischl	0:d9266031f832	447	sc->sc_state = PPPOE_STATE_PADO_SENT;
mafischl	0:d9266031f832	448	pppoe_send_pado(sc);
mafischl	0:d9266031f832	449	break;
mafischl	0:d9266031f832	450	#endif /* PPPOE_SERVER */
mafischl	0:d9266031f832	451	case PPPOE_CODE_PADR:
mafischl	0:d9266031f832	452	#ifdef PPPOE_SERVER
mafischl	0:d9266031f832	453	/*
mafischl	0:d9266031f832	454	* get sc from ac_cookie if IFF_PASSIVE
mafischl	0:d9266031f832	455	*/
mafischl	0:d9266031f832	456	if (ac_cookie == NULL) {
mafischl	0:d9266031f832	457	/* be quiet if there is not a single pppoe instance */
mafischl	0:d9266031f832	458	printf("pppoe: received PADR but not includes ac_cookie\n");
mafischl	0:d9266031f832	459	goto done;
mafischl	0:d9266031f832	460	}
mafischl	0:d9266031f832	461	sc = pppoe_find_softc_by_hunique(ac_cookie, ac_cookie_len, netif);
mafischl	0:d9266031f832	462	if (sc == NULL) {
mafischl	0:d9266031f832	463	/* be quiet if there is not a single pppoe instance */
mafischl	0:d9266031f832	464	if (!LIST_EMPTY(&pppoe_softc_list)) {
mafischl	0:d9266031f832	465	printf("pppoe: received PADR but could not find request for it\n");
mafischl	0:d9266031f832	466	}
mafischl	0:d9266031f832	467	goto done;
mafischl	0:d9266031f832	468	}
mafischl	0:d9266031f832	469	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
mafischl	0:d9266031f832	470	printf("%c%c%"U16_F": received unexpected PADR\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
mafischl	0:d9266031f832	471	goto done;
mafischl	0:d9266031f832	472	}
mafischl	0:d9266031f832	473	if (hunique) {
mafischl	0:d9266031f832	474	if (sc->sc_hunique) {
mafischl	0:d9266031f832	475	mem_free(sc->sc_hunique);
mafischl	0:d9266031f832	476	}
mafischl	0:d9266031f832	477	sc->sc_hunique = mem_malloc(hunique_len);
mafischl	0:d9266031f832	478	if (sc->sc_hunique == NULL) {
mafischl	0:d9266031f832	479	goto done;
mafischl	0:d9266031f832	480	}
mafischl	0:d9266031f832	481	sc->sc_hunique_len = hunique_len;
mafischl	0:d9266031f832	482	MEMCPY(sc->sc_hunique, hunique, hunique_len);
mafischl	0:d9266031f832	483	}
mafischl	0:d9266031f832	484	pppoe_send_pads(sc);
mafischl	0:d9266031f832	485	sc->sc_state = PPPOE_STATE_SESSION;
mafischl	0:d9266031f832	486	pppoe_linkstatus_up(sc); /* notify upper layers */
mafischl	0:d9266031f832	487	break;
mafischl	0:d9266031f832	488	#else
mafischl	0:d9266031f832	489	/* ignore, we are no access concentrator */
mafischl	0:d9266031f832	490	goto done;
mafischl	0:d9266031f832	491	#endif /* PPPOE_SERVER */
mafischl	0:d9266031f832	492	case PPPOE_CODE_PADO:
mafischl	0:d9266031f832	493	if (sc == NULL) {
mafischl	0:d9266031f832	494	/* be quiet if there is not a single pppoe instance */
mafischl	0:d9266031f832	495	if (pppoe_softc_list != NULL) {
mafischl	0:d9266031f832	496	printf("pppoe: received PADO but could not find request for it\n");
mafischl	0:d9266031f832	497	}
mafischl	0:d9266031f832	498	goto done;
mafischl	0:d9266031f832	499	}
mafischl	0:d9266031f832	500	if (sc->sc_state != PPPOE_STATE_PADI_SENT) {
mafischl	0:d9266031f832	501	printf("%c%c%"U16_F": received unexpected PADO\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
mafischl	0:d9266031f832	502	goto done;
mafischl	0:d9266031f832	503	}
mafischl	0:d9266031f832	504	if (ac_cookie) {
mafischl	0:d9266031f832	505	sc->sc_ac_cookie_len = ac_cookie_len;
mafischl	0:d9266031f832	506	MEMCPY(sc->sc_ac_cookie, ac_cookie, ac_cookie_len);
mafischl	0:d9266031f832	507	}
mafischl	0:d9266031f832	508	MEMCPY(&sc->sc_dest, ethhdr->src.addr, sizeof(sc->sc_dest.addr));
mafischl	0:d9266031f832	509	sys_untimeout(pppoe_timeout, sc);
mafischl	0:d9266031f832	510	sc->sc_padr_retried = 0;
mafischl	0:d9266031f832	511	sc->sc_state = PPPOE_STATE_PADR_SENT;
mafischl	0:d9266031f832	512	if ((err = pppoe_send_padr(sc)) != 0) {
mafischl	0:d9266031f832	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));
mafischl	0:d9266031f832	514	}
mafischl	0:d9266031f832	515	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
mafischl	0:d9266031f832	516	break;
mafischl	0:d9266031f832	517	case PPPOE_CODE_PADS:
mafischl	0:d9266031f832	518	if (sc == NULL) {
mafischl	0:d9266031f832	519	goto done;
mafischl	0:d9266031f832	520	}
mafischl	0:d9266031f832	521	sc->sc_session = session;
mafischl	0:d9266031f832	522	sys_untimeout(pppoe_timeout, sc);
mafischl	0:d9266031f832	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));
mafischl	0:d9266031f832	524	sc->sc_state = PPPOE_STATE_SESSION;
mafischl	0:d9266031f832	525	pppoe_linkstatus_up(sc); /* notify upper layers */
mafischl	0:d9266031f832	526	break;
mafischl	0:d9266031f832	527	case PPPOE_CODE_PADT:
mafischl	0:d9266031f832	528	if (sc == NULL) {
mafischl	0:d9266031f832	529	goto done;
mafischl	0:d9266031f832	530	}
mafischl	0:d9266031f832	531	pppoe_clear_softc(sc, "received PADT");
mafischl	0:d9266031f832	532	break;
mafischl	0:d9266031f832	533	default:
mafischl	0:d9266031f832	534	if(sc) {
mafischl	0:d9266031f832	535	printf("%c%c%"U16_F": unknown code (0x%"X16_F") session = 0x%"X16_F"\n",
mafischl	0:d9266031f832	536	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
mafischl	0:d9266031f832	537	(u16_t)ph->code, session);
mafischl	0:d9266031f832	538	} else {
mafischl	0:d9266031f832	539	printf("pppoe: unknown code (0x%"X16_F") session = 0x%"X16_F"\n", (u16_t)ph->code, session);
mafischl	0:d9266031f832	540	}
mafischl	0:d9266031f832	541	break;
mafischl	0:d9266031f832	542	}
mafischl	0:d9266031f832	543
mafischl	0:d9266031f832	544	done:
mafischl	0:d9266031f832	545	pbuf_free(pb);
mafischl	0:d9266031f832	546	return;
mafischl	0:d9266031f832	547	}
mafischl	0:d9266031f832	548
mafischl	0:d9266031f832	549	void
mafischl	0:d9266031f832	550	pppoe_disc_input(struct netif netif, struct pbuf p)
mafischl	0:d9266031f832	551	{
mafischl	0:d9266031f832	552	/* avoid error messages if there is not a single pppoe instance */
mafischl	0:d9266031f832	553	if (pppoe_softc_list != NULL) {
mafischl	0:d9266031f832	554	pppoe_dispatch_disc_pkt(netif, p);
mafischl	0:d9266031f832	555	} else {
mafischl	0:d9266031f832	556	pbuf_free(p);
mafischl	0:d9266031f832	557	}
mafischl	0:d9266031f832	558	}
mafischl	0:d9266031f832	559
mafischl	0:d9266031f832	560	void
mafischl	0:d9266031f832	561	pppoe_data_input(struct netif netif, struct pbuf pb)
mafischl	0:d9266031f832	562	{
mafischl	0:d9266031f832	563	u16_t session, plen;
mafischl	0:d9266031f832	564	struct pppoe_softc *sc;
mafischl	0:d9266031f832	565	struct pppoehdr *ph;
mafischl	0:d9266031f832	566	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
mafischl	0:d9266031f832	567	u8_t shost[ETHER_ADDR_LEN];
mafischl	0:d9266031f832	568	#endif
mafischl	0:d9266031f832	569
mafischl	0:d9266031f832	570	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
mafischl	0:d9266031f832	571	MEMCPY(shost, ((struct eth_hdr *)pb->payload)->src.addr, sizeof(shost));
mafischl	0:d9266031f832	572	#endif
mafischl	0:d9266031f832	573	if (pbuf_header(pb, -(int)sizeof(struct eth_hdr)) != 0) {
mafischl	0:d9266031f832	574	/* bail out */
mafischl	0:d9266031f832	575	PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header failed\n"));
mafischl	0:d9266031f832	576	LINK_STATS_INC(link.lenerr);
mafischl	0:d9266031f832	577	goto drop;
mafischl	0:d9266031f832	578	}
mafischl	0:d9266031f832	579
mafischl	0:d9266031f832	580	pb = pppSingleBuf (pb);
mafischl	0:d9266031f832	581
mafischl	0:d9266031f832	582	if (pb->len <= PPPOE_HEADERLEN) {
mafischl	0:d9266031f832	583	printf("pppoe (data): dropping too short packet: %d bytes\n", pb->len);
mafischl	0:d9266031f832	584	goto drop;
mafischl	0:d9266031f832	585	}
mafischl	0:d9266031f832	586
mafischl	0:d9266031f832	587	if (pb->len < sizeof(*ph)) {
mafischl	0:d9266031f832	588	printf("pppoe_data_input: could not get PPPoE header\n");
mafischl	0:d9266031f832	589	goto drop;
mafischl	0:d9266031f832	590	}
mafischl	0:d9266031f832	591	ph = (struct pppoehdr *)pb->payload;
mafischl	0:d9266031f832	592
mafischl	0:d9266031f832	593	if (ph->vertype != PPPOE_VERTYPE) {
mafischl	0:d9266031f832	594	printf("pppoe (data): unknown version/type packet: 0x%x\n", ph->vertype);
mafischl	0:d9266031f832	595	goto drop;
mafischl	0:d9266031f832	596	}
mafischl	0:d9266031f832	597	if (ph->code != 0) {
mafischl	0:d9266031f832	598	goto drop;
mafischl	0:d9266031f832	599	}
mafischl	0:d9266031f832	600
mafischl	0:d9266031f832	601	session = ntohs(ph->session);
mafischl	0:d9266031f832	602	sc = pppoe_find_softc_by_session(session, netif);
mafischl	0:d9266031f832	603	if (sc == NULL) {
mafischl	0:d9266031f832	604	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
mafischl	0:d9266031f832	605	printf("pppoe: input for unknown session 0x%x, sending PADT\n", session);
mafischl	0:d9266031f832	606	pppoe_send_padt(netif, session, shost);
mafischl	0:d9266031f832	607	#endif
mafischl	0:d9266031f832	608	goto drop;
mafischl	0:d9266031f832	609	}
mafischl	0:d9266031f832	610
mafischl	0:d9266031f832	611	plen = ntohs(ph->plen);
mafischl	0:d9266031f832	612
mafischl	0:d9266031f832	613	if (pbuf_header(pb, -(int)(PPPOE_HEADERLEN)) != 0) {
mafischl	0:d9266031f832	614	/* bail out */
mafischl	0:d9266031f832	615	PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header PPPOE_HEADERLEN failed\n"));
mafischl	0:d9266031f832	616	LINK_STATS_INC(link.lenerr);
mafischl	0:d9266031f832	617	goto drop;
mafischl	0:d9266031f832	618	}
mafischl	0:d9266031f832	619
mafischl	0:d9266031f832	620	PPPDEBUG(LOG_DEBUG, ("pppoe_data_input: %c%c%"U16_F": pkthdr.len=%d, pppoe.len=%d\n",
mafischl	0:d9266031f832	621	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
mafischl	0:d9266031f832	622	pb->len, plen));
mafischl	0:d9266031f832	623
mafischl	0:d9266031f832	624	if (pb->len < plen) {
mafischl	0:d9266031f832	625	goto drop;
mafischl	0:d9266031f832	626	}
mafischl	0:d9266031f832	627
mafischl	0:d9266031f832	628	pppInProcOverEthernet(sc->sc_pd, pb);
mafischl	0:d9266031f832	629
mafischl	0:d9266031f832	630	return;
mafischl	0:d9266031f832	631
mafischl	0:d9266031f832	632	drop:
mafischl	0:d9266031f832	633	pbuf_free(pb);
mafischl	0:d9266031f832	634	}
mafischl	0:d9266031f832	635
mafischl	0:d9266031f832	636	static err_t
mafischl	0:d9266031f832	637	pppoe_output(struct pppoe_softc sc, struct pbuf pb)
mafischl	0:d9266031f832	638	{
mafischl	0:d9266031f832	639	struct eth_hdr *ethhdr;
mafischl	0:d9266031f832	640	u16_t etype;
mafischl	0:d9266031f832	641	err_t res;
mafischl	0:d9266031f832	642
mafischl	0:d9266031f832	643	if (!sc->sc_ethif) {
mafischl	0:d9266031f832	644	pbuf_free(pb);
mafischl	0:d9266031f832	645	return ERR_IF;
mafischl	0:d9266031f832	646	}
mafischl	0:d9266031f832	647
mafischl	0:d9266031f832	648	ethhdr = (struct eth_hdr *)pb->payload;
mafischl	0:d9266031f832	649	etype = sc->sc_state == PPPOE_STATE_SESSION ? ETHTYPE_PPPOE : ETHTYPE_PPPOEDISC;
mafischl	0:d9266031f832	650	ethhdr->type = htons(etype);
mafischl	0:d9266031f832	651	MEMCPY(ethhdr->dest.addr, sc->sc_dest.addr, sizeof(ethhdr->dest.addr));
mafischl	0:d9266031f832	652	MEMCPY(ethhdr->src.addr, ((struct eth_addr *)sc->sc_ethif->hwaddr)->addr, sizeof(ethhdr->src.addr));
mafischl	0:d9266031f832	653
mafischl	0:d9266031f832	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",
mafischl	0:d9266031f832	655	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, etype,
mafischl	0:d9266031f832	656	sc->sc_state, sc->sc_session,
mafischl	0:d9266031f832	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],
mafischl	0:d9266031f832	658	pb->tot_len));
mafischl	0:d9266031f832	659
mafischl	0:d9266031f832	660	res = sc->sc_ethif->linkoutput(sc->sc_ethif, pb);
mafischl	0:d9266031f832	661
mafischl	0:d9266031f832	662	pbuf_free(pb);
mafischl	0:d9266031f832	663
mafischl	0:d9266031f832	664	return res;
mafischl	0:d9266031f832	665	}
mafischl	0:d9266031f832	666
mafischl	0:d9266031f832	667	static err_t
mafischl	0:d9266031f832	668	pppoe_send_padi(struct pppoe_softc *sc)
mafischl	0:d9266031f832	669	{
mafischl	0:d9266031f832	670	struct pbuf *pb;
mafischl	0:d9266031f832	671	u8_t *p;
mafischl	0:d9266031f832	672	int len;
mafischl	0:d9266031f832	673	#ifdef PPPOE_TODO
mafischl	0:d9266031f832	674	int l1 = 0, l2 = 0; /* XXX: gcc */
mafischl	0:d9266031f832	675	#endif /* PPPOE_TODO */
mafischl	0:d9266031f832	676
mafischl	0:d9266031f832	677	if (sc->sc_state >PPPOE_STATE_PADI_SENT) {
mafischl	0:d9266031f832	678	PPPDEBUG(LOG_ERR, ("ERROR: pppoe_send_padi in state %d", sc->sc_state));
mafischl	0:d9266031f832	679	}
mafischl	0:d9266031f832	680
mafischl	0:d9266031f832	681	/* calculate length of frame (excluding ethernet header + pppoe header) */
mafischl	0:d9266031f832	682	len = 2 + 2 + 2 + 2 + sizeof sc; /* service name tag is required, host unique is send too */
mafischl	0:d9266031f832	683	#ifdef PPPOE_TODO
mafischl	0:d9266031f832	684	if (sc->sc_service_name != NULL) {
mafischl	0:d9266031f832	685	l1 = (int)strlen(sc->sc_service_name);
mafischl	0:d9266031f832	686	len += l1;
mafischl	0:d9266031f832	687	}
mafischl	0:d9266031f832	688	if (sc->sc_concentrator_name != NULL) {
mafischl	0:d9266031f832	689	l2 = (int)strlen(sc->sc_concentrator_name);
mafischl	0:d9266031f832	690	len += 2 + 2 + l2;
mafischl	0:d9266031f832	691	}
mafischl	0:d9266031f832	692	#endif /* PPPOE_TODO */
mafischl	0:d9266031f832	693	LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
mafischl	0:d9266031f832	694	sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
mafischl	0:d9266031f832	695
mafischl	0:d9266031f832	696	/* allocate a buffer */
mafischl	0:d9266031f832	697	pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
mafischl	0:d9266031f832	698	if (!pb) {
mafischl	0:d9266031f832	699	return ERR_MEM;
mafischl	0:d9266031f832	700	}
mafischl	0:d9266031f832	701	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
mafischl	0:d9266031f832	702
mafischl	0:d9266031f832	703	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
mafischl	0:d9266031f832	704	/* fill in pkt */
mafischl	0:d9266031f832	705	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADI, 0, (u16_t)len);
mafischl	0:d9266031f832	706	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
mafischl	0:d9266031f832	707	#ifdef PPPOE_TODO
mafischl	0:d9266031f832	708	if (sc->sc_service_name != NULL) {
mafischl	0:d9266031f832	709	PPPOE_ADD_16(p, l1);
mafischl	0:d9266031f832	710	MEMCPY(p, sc->sc_service_name, l1);
mafischl	0:d9266031f832	711	p += l1;
mafischl	0:d9266031f832	712	} else
mafischl	0:d9266031f832	713	#endif /* PPPOE_TODO */
mafischl	0:d9266031f832	714	{
mafischl	0:d9266031f832	715	PPPOE_ADD_16(p, 0);
mafischl	0:d9266031f832	716	}
mafischl	0:d9266031f832	717	#ifdef PPPOE_TODO
mafischl	0:d9266031f832	718	if (sc->sc_concentrator_name != NULL) {
mafischl	0:d9266031f832	719	PPPOE_ADD_16(p, PPPOE_TAG_ACNAME);
mafischl	0:d9266031f832	720	PPPOE_ADD_16(p, l2);
mafischl	0:d9266031f832	721	MEMCPY(p, sc->sc_concentrator_name, l2);
mafischl	0:d9266031f832	722	p += l2;
mafischl	0:d9266031f832	723	}
mafischl	0:d9266031f832	724	#endif /* PPPOE_TODO */
mafischl	0:d9266031f832	725	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
mafischl	0:d9266031f832	726	PPPOE_ADD_16(p, sizeof(sc));
mafischl	0:d9266031f832	727	MEMCPY(p, &sc, sizeof sc);
mafischl	0:d9266031f832	728
mafischl	0:d9266031f832	729	/* send pkt */
mafischl	0:d9266031f832	730	return pppoe_output(sc, pb);
mafischl	0:d9266031f832	731	}
mafischl	0:d9266031f832	732
mafischl	0:d9266031f832	733	static void
mafischl	0:d9266031f832	734	pppoe_timeout(void *arg)
mafischl	0:d9266031f832	735	{
mafischl	0:d9266031f832	736	int retry_wait, err;
mafischl	0:d9266031f832	737	struct pppoe_softc sc = (struct pppoe_softc)arg;
mafischl	0:d9266031f832	738
mafischl	0:d9266031f832	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));
mafischl	0:d9266031f832	740
mafischl	0:d9266031f832	741	switch (sc->sc_state) {
mafischl	0:d9266031f832	742	case PPPOE_STATE_PADI_SENT:
mafischl	0:d9266031f832	743	/*
mafischl	0:d9266031f832	744	* We have two basic ways of retrying:
mafischl	0:d9266031f832	745	* - Quick retry mode: try a few times in short sequence
mafischl	0:d9266031f832	746	* - Slow retry mode: we already had a connection successfully
mafischl	0:d9266031f832	747	* established and will try infinitely (without user
mafischl	0:d9266031f832	748	* intervention)
mafischl	0:d9266031f832	749	* We only enter slow retry mode if IFF_LINK1 (aka autodial)
mafischl	0:d9266031f832	750	* is not set.
mafischl	0:d9266031f832	751	*/
mafischl	0:d9266031f832	752
mafischl	0:d9266031f832	753	/* initialize for quick retry mode */
mafischl	0:d9266031f832	754	retry_wait = PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried);
mafischl	0:d9266031f832	755
mafischl	0:d9266031f832	756	sc->sc_padi_retried++;
mafischl	0:d9266031f832	757	if (sc->sc_padi_retried >= PPPOE_DISC_MAXPADI) {
mafischl	0:d9266031f832	758	#if 0
mafischl	0:d9266031f832	759	if ((sc->sc_sppp.pp_if.if_flags & IFF_LINK1) == 0) {
mafischl	0:d9266031f832	760	/* slow retry mode */
mafischl	0:d9266031f832	761	retry_wait = PPPOE_SLOW_RETRY;
mafischl	0:d9266031f832	762	} else
mafischl	0:d9266031f832	763	#endif
mafischl	0:d9266031f832	764	{
mafischl	0:d9266031f832	765	pppoe_abort_connect(sc);
mafischl	0:d9266031f832	766	return;
mafischl	0:d9266031f832	767	}
mafischl	0:d9266031f832	768	}
mafischl	0:d9266031f832	769	if ((err = pppoe_send_padi(sc)) != 0) {
mafischl	0:d9266031f832	770	sc->sc_padi_retried--;
mafischl	0:d9266031f832	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));
mafischl	0:d9266031f832	772	}
mafischl	0:d9266031f832	773	sys_timeout(retry_wait, pppoe_timeout, sc);
mafischl	0:d9266031f832	774	break;
mafischl	0:d9266031f832	775
mafischl	0:d9266031f832	776	case PPPOE_STATE_PADR_SENT:
mafischl	0:d9266031f832	777	sc->sc_padr_retried++;
mafischl	0:d9266031f832	778	if (sc->sc_padr_retried >= PPPOE_DISC_MAXPADR) {
mafischl	0:d9266031f832	779	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
mafischl	0:d9266031f832	780	sc->sc_state = PPPOE_STATE_PADI_SENT;
mafischl	0:d9266031f832	781	sc->sc_padr_retried = 0;
mafischl	0:d9266031f832	782	if ((err = pppoe_send_padi(sc)) != 0) {
mafischl	0:d9266031f832	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));
mafischl	0:d9266031f832	784	}
mafischl	0:d9266031f832	785	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried), pppoe_timeout, sc);
mafischl	0:d9266031f832	786	return;
mafischl	0:d9266031f832	787	}
mafischl	0:d9266031f832	788	if ((err = pppoe_send_padr(sc)) != 0) {
mafischl	0:d9266031f832	789	sc->sc_padr_retried--;
mafischl	0:d9266031f832	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));
mafischl	0:d9266031f832	791	}
mafischl	0:d9266031f832	792	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
mafischl	0:d9266031f832	793	break;
mafischl	0:d9266031f832	794	case PPPOE_STATE_CLOSING:
mafischl	0:d9266031f832	795	pppoe_do_disconnect(sc);
mafischl	0:d9266031f832	796	break;
mafischl	0:d9266031f832	797	default:
mafischl	0:d9266031f832	798	return; /* all done, work in peace */
mafischl	0:d9266031f832	799	}
mafischl	0:d9266031f832	800	}
mafischl	0:d9266031f832	801
mafischl	0:d9266031f832	802	/* Start a connection (i.e. initiate discovery phase) */
mafischl	0:d9266031f832	803	int
mafischl	0:d9266031f832	804	pppoe_connect(struct pppoe_softc *sc)
mafischl	0:d9266031f832	805	{
mafischl	0:d9266031f832	806	int err;
mafischl	0:d9266031f832	807
mafischl	0:d9266031f832	808	if (sc->sc_state != PPPOE_STATE_INITIAL) {
mafischl	0:d9266031f832	809	return EBUSY;
mafischl	0:d9266031f832	810	}
mafischl	0:d9266031f832	811
mafischl	0:d9266031f832	812	#ifdef PPPOE_SERVER
mafischl	0:d9266031f832	813	/* wait PADI if IFF_PASSIVE */
mafischl	0:d9266031f832	814	if ((sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
mafischl	0:d9266031f832	815	return 0;
mafischl	0:d9266031f832	816	}
mafischl	0:d9266031f832	817	#endif
mafischl	0:d9266031f832	818	/* save state, in case we fail to send PADI */
mafischl	0:d9266031f832	819	sc->sc_state = PPPOE_STATE_PADI_SENT;
mafischl	0:d9266031f832	820	sc->sc_padr_retried = 0;
mafischl	0:d9266031f832	821	err = pppoe_send_padi(sc);
mafischl	0:d9266031f832	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));
mafischl	0:d9266031f832	823	sys_timeout(PPPOE_DISC_TIMEOUT, pppoe_timeout, sc);
mafischl	0:d9266031f832	824	return err;
mafischl	0:d9266031f832	825	}
mafischl	0:d9266031f832	826
mafischl	0:d9266031f832	827	/* disconnect */
mafischl	0:d9266031f832	828	void
mafischl	0:d9266031f832	829	pppoe_disconnect(struct pppoe_softc *sc)
mafischl	0:d9266031f832	830	{
mafischl	0:d9266031f832	831	if (sc->sc_state < PPPOE_STATE_SESSION) {
mafischl	0:d9266031f832	832	return;
mafischl	0:d9266031f832	833	}
mafischl	0:d9266031f832	834	/*
mafischl	0:d9266031f832	835	* Do not call pppoe_disconnect here, the upper layer state
mafischl	0:d9266031f832	836	* machine gets confused by this. We must return from this
mafischl	0:d9266031f832	837	* function and defer disconnecting to the timeout handler.
mafischl	0:d9266031f832	838	*/
mafischl	0:d9266031f832	839	sc->sc_state = PPPOE_STATE_CLOSING;
mafischl	0:d9266031f832	840	sys_timeout(20, pppoe_timeout, sc);
mafischl	0:d9266031f832	841	}
mafischl	0:d9266031f832	842
mafischl	0:d9266031f832	843	static int
mafischl	0:d9266031f832	844	pppoe_do_disconnect(struct pppoe_softc *sc)
mafischl	0:d9266031f832	845	{
mafischl	0:d9266031f832	846	int err;
mafischl	0:d9266031f832	847
mafischl	0:d9266031f832	848	if (sc->sc_state < PPPOE_STATE_SESSION) {
mafischl	0:d9266031f832	849	err = EBUSY;
mafischl	0:d9266031f832	850	} else {
mafischl	0:d9266031f832	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));
mafischl	0:d9266031f832	852	err = pppoe_send_padt(sc->sc_ethif, sc->sc_session, (const u8_t *)&sc->sc_dest);
mafischl	0:d9266031f832	853	}
mafischl	0:d9266031f832	854
mafischl	0:d9266031f832	855	/* cleanup softc */
mafischl	0:d9266031f832	856	sc->sc_state = PPPOE_STATE_INITIAL;
mafischl	0:d9266031f832	857	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
mafischl	0:d9266031f832	858	sc->sc_ac_cookie_len = 0;
mafischl	0:d9266031f832	859	#ifdef PPPOE_SERVER
mafischl	0:d9266031f832	860	if (sc->sc_hunique) {
mafischl	0:d9266031f832	861	mem_free(sc->sc_hunique);
mafischl	0:d9266031f832	862	sc->sc_hunique = NULL;
mafischl	0:d9266031f832	863	}
mafischl	0:d9266031f832	864	sc->sc_hunique_len = 0;
mafischl	0:d9266031f832	865	#endif
mafischl	0:d9266031f832	866	sc->sc_session = 0;
mafischl	0:d9266031f832	867
mafischl	0:d9266031f832	868	sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
mafischl	0:d9266031f832	869
mafischl	0:d9266031f832	870	return err;
mafischl	0:d9266031f832	871	}
mafischl	0:d9266031f832	872
mafischl	0:d9266031f832	873	/* Connection attempt aborted */
mafischl	0:d9266031f832	874	static void
mafischl	0:d9266031f832	875	pppoe_abort_connect(struct pppoe_softc *sc)
mafischl	0:d9266031f832	876	{
mafischl	0:d9266031f832	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);
mafischl	0:d9266031f832	878	sc->sc_state = PPPOE_STATE_CLOSING;
mafischl	0:d9266031f832	879
mafischl	0:d9266031f832	880	sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
mafischl	0:d9266031f832	881
mafischl	0:d9266031f832	882	/* clear connection state */
mafischl	0:d9266031f832	883	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
mafischl	0:d9266031f832	884	sc->sc_state = PPPOE_STATE_INITIAL;
mafischl	0:d9266031f832	885	}
mafischl	0:d9266031f832	886
mafischl	0:d9266031f832	887	/* Send a PADR packet */
mafischl	0:d9266031f832	888	static err_t
mafischl	0:d9266031f832	889	pppoe_send_padr(struct pppoe_softc *sc)
mafischl	0:d9266031f832	890	{
mafischl	0:d9266031f832	891	struct pbuf *pb;
mafischl	0:d9266031f832	892	u8_t *p;
mafischl	0:d9266031f832	893	size_t len;
mafischl	0:d9266031f832	894	#ifdef PPPOE_TODO
mafischl	0:d9266031f832	895	size_t l1 = 0; /* XXX: gcc */
mafischl	0:d9266031f832	896	#endif /* PPPOE_TODO */
mafischl	0:d9266031f832	897
mafischl	0:d9266031f832	898	if (sc->sc_state != PPPOE_STATE_PADR_SENT) {
mafischl	0:d9266031f832	899	return ERR_CONN;
mafischl	0:d9266031f832	900	}
mafischl	0:d9266031f832	901
mafischl	0:d9266031f832	902	len = 2 + 2 + 2 + 2 + sizeof(sc); /* service name, host unique */
mafischl	0:d9266031f832	903	#ifdef PPPOE_TODO
mafischl	0:d9266031f832	904	if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
mafischl	0:d9266031f832	905	l1 = strlen(sc->sc_service_name);
mafischl	0:d9266031f832	906	len += l1;
mafischl	0:d9266031f832	907	}
mafischl	0:d9266031f832	908	#endif /* PPPOE_TODO */
mafischl	0:d9266031f832	909	if (sc->sc_ac_cookie_len > 0) {
mafischl	0:d9266031f832	910	len += 2 + 2 + sc->sc_ac_cookie_len; /* AC cookie */
mafischl	0:d9266031f832	911	}
mafischl	0:d9266031f832	912	LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
mafischl	0:d9266031f832	913	sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
mafischl	0:d9266031f832	914	pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
mafischl	0:d9266031f832	915	if (!pb) {
mafischl	0:d9266031f832	916	return ERR_MEM;
mafischl	0:d9266031f832	917	}
mafischl	0:d9266031f832	918	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
mafischl	0:d9266031f832	919	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
mafischl	0:d9266031f832	920	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADR, 0, len);
mafischl	0:d9266031f832	921	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
mafischl	0:d9266031f832	922	#ifdef PPPOE_TODO
mafischl	0:d9266031f832	923	if (sc->sc_service_name != NULL) {
mafischl	0:d9266031f832	924	PPPOE_ADD_16(p, l1);
mafischl	0:d9266031f832	925	MEMCPY(p, sc->sc_service_name, l1);
mafischl	0:d9266031f832	926	p += l1;
mafischl	0:d9266031f832	927	} else
mafischl	0:d9266031f832	928	#endif /* PPPOE_TODO */
mafischl	0:d9266031f832	929	{
mafischl	0:d9266031f832	930	PPPOE_ADD_16(p, 0);
mafischl	0:d9266031f832	931	}
mafischl	0:d9266031f832	932	if (sc->sc_ac_cookie_len > 0) {
mafischl	0:d9266031f832	933	PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
mafischl	0:d9266031f832	934	PPPOE_ADD_16(p, sc->sc_ac_cookie_len);
mafischl	0:d9266031f832	935	MEMCPY(p, sc->sc_ac_cookie, sc->sc_ac_cookie_len);
mafischl	0:d9266031f832	936	p += sc->sc_ac_cookie_len;
mafischl	0:d9266031f832	937	}
mafischl	0:d9266031f832	938	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
mafischl	0:d9266031f832	939	PPPOE_ADD_16(p, sizeof(sc));
mafischl	0:d9266031f832	940	MEMCPY(p, &sc, sizeof sc);
mafischl	0:d9266031f832	941
mafischl	0:d9266031f832	942	return pppoe_output(sc, pb);
mafischl	0:d9266031f832	943	}
mafischl	0:d9266031f832	944
mafischl	0:d9266031f832	945	/* send a PADT packet */
mafischl	0:d9266031f832	946	static err_t
mafischl	0:d9266031f832	947	pppoe_send_padt(struct netif outgoing_if, u_int session, const u8_t dest)
mafischl	0:d9266031f832	948	{
mafischl	0:d9266031f832	949	struct pbuf *pb;
mafischl	0:d9266031f832	950	struct eth_hdr *ethhdr;
mafischl	0:d9266031f832	951	err_t res;
mafischl	0:d9266031f832	952	u8_t *p;
mafischl	0:d9266031f832	953
mafischl	0:d9266031f832	954	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN, PBUF_RAM);
mafischl	0:d9266031f832	955	if (!pb) {
mafischl	0:d9266031f832	956	return ERR_MEM;
mafischl	0:d9266031f832	957	}
mafischl	0:d9266031f832	958	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
mafischl	0:d9266031f832	959
mafischl	0:d9266031f832	960	ethhdr = (struct eth_hdr *)pb->payload;
mafischl	0:d9266031f832	961	ethhdr->type = PP_HTONS(ETHTYPE_PPPOEDISC);
mafischl	0:d9266031f832	962	MEMCPY(ethhdr->dest.addr, dest, sizeof(ethhdr->dest.addr));
mafischl	0:d9266031f832	963	MEMCPY(ethhdr->src.addr, ((struct eth_addr *)outgoing_if->hwaddr)->addr, sizeof(ethhdr->src.addr));
mafischl	0:d9266031f832	964
mafischl	0:d9266031f832	965	p = (u8_t*)(ethhdr + 1);
mafischl	0:d9266031f832	966	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADT, session, 0);
mafischl	0:d9266031f832	967
mafischl	0:d9266031f832	968	res = outgoing_if->linkoutput(outgoing_if, pb);
mafischl	0:d9266031f832	969
mafischl	0:d9266031f832	970	pbuf_free(pb);
mafischl	0:d9266031f832	971
mafischl	0:d9266031f832	972	return res;
mafischl	0:d9266031f832	973	}
mafischl	0:d9266031f832	974
mafischl	0:d9266031f832	975	#ifdef PPPOE_SERVER
mafischl	0:d9266031f832	976	static err_t
mafischl	0:d9266031f832	977	pppoe_send_pado(struct pppoe_softc *sc)
mafischl	0:d9266031f832	978	{
mafischl	0:d9266031f832	979	struct pbuf *pb;
mafischl	0:d9266031f832	980	u8_t *p;
mafischl	0:d9266031f832	981	size_t len;
mafischl	0:d9266031f832	982
mafischl	0:d9266031f832	983	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
mafischl	0:d9266031f832	984	return ERR_CONN;
mafischl	0:d9266031f832	985	}
mafischl	0:d9266031f832	986
mafischl	0:d9266031f832	987	/* calc length */
mafischl	0:d9266031f832	988	len = 0;
mafischl	0:d9266031f832	989	/* include ac_cookie */
mafischl	0:d9266031f832	990	len += 2 + 2 + sizeof(sc);
mafischl	0:d9266031f832	991	/* include hunique */
mafischl	0:d9266031f832	992	len += 2 + 2 + sc->sc_hunique_len;
mafischl	0:d9266031f832	993	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
mafischl	0:d9266031f832	994	if (!pb) {
mafischl	0:d9266031f832	995	return ERR_MEM;
mafischl	0:d9266031f832	996	}
mafischl	0:d9266031f832	997	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
mafischl	0:d9266031f832	998	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
mafischl	0:d9266031f832	999	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADO, 0, len);
mafischl	0:d9266031f832	1000	PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
mafischl	0:d9266031f832	1001	PPPOE_ADD_16(p, sizeof(sc));
mafischl	0:d9266031f832	1002	MEMCPY(p, &sc, sizeof(sc));
mafischl	0:d9266031f832	1003	p += sizeof(sc);
mafischl	0:d9266031f832	1004	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
mafischl	0:d9266031f832	1005	PPPOE_ADD_16(p, sc->sc_hunique_len);
mafischl	0:d9266031f832	1006	MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
mafischl	0:d9266031f832	1007	return pppoe_output(sc, pb);
mafischl	0:d9266031f832	1008	}
mafischl	0:d9266031f832	1009
mafischl	0:d9266031f832	1010	static err_t
mafischl	0:d9266031f832	1011	pppoe_send_pads(struct pppoe_softc *sc)
mafischl	0:d9266031f832	1012	{
mafischl	0:d9266031f832	1013	struct pbuf *pb;
mafischl	0:d9266031f832	1014	u8_t *p;
mafischl	0:d9266031f832	1015	size_t len, l1 = 0; /* XXX: gcc */
mafischl	0:d9266031f832	1016
mafischl	0:d9266031f832	1017	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
mafischl	0:d9266031f832	1018	return ERR_CONN;
mafischl	0:d9266031f832	1019	}
mafischl	0:d9266031f832	1020
mafischl	0:d9266031f832	1021	sc->sc_session = mono_time.tv_sec % 0xff + 1;
mafischl	0:d9266031f832	1022	/* calc length */
mafischl	0:d9266031f832	1023	len = 0;
mafischl	0:d9266031f832	1024	/* include hunique */
mafischl	0:d9266031f832	1025	len += 2 + 2 + 2 + 2 + sc->sc_hunique_len; /* service name, host unique*/
mafischl	0:d9266031f832	1026	if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
mafischl	0:d9266031f832	1027	l1 = strlen(sc->sc_service_name);
mafischl	0:d9266031f832	1028	len += l1;
mafischl	0:d9266031f832	1029	}
mafischl	0:d9266031f832	1030	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
mafischl	0:d9266031f832	1031	if (!pb) {
mafischl	0:d9266031f832	1032	return ERR_MEM;
mafischl	0:d9266031f832	1033	}
mafischl	0:d9266031f832	1034	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
mafischl	0:d9266031f832	1035	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
mafischl	0:d9266031f832	1036	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADS, sc->sc_session, len);
mafischl	0:d9266031f832	1037	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
mafischl	0:d9266031f832	1038	if (sc->sc_service_name != NULL) {
mafischl	0:d9266031f832	1039	PPPOE_ADD_16(p, l1);
mafischl	0:d9266031f832	1040	MEMCPY(p, sc->sc_service_name, l1);
mafischl	0:d9266031f832	1041	p += l1;
mafischl	0:d9266031f832	1042	} else {
mafischl	0:d9266031f832	1043	PPPOE_ADD_16(p, 0);
mafischl	0:d9266031f832	1044	}
mafischl	0:d9266031f832	1045	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
mafischl	0:d9266031f832	1046	PPPOE_ADD_16(p, sc->sc_hunique_len);
mafischl	0:d9266031f832	1047	MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
mafischl	0:d9266031f832	1048	return pppoe_output(sc, pb);
mafischl	0:d9266031f832	1049	}
mafischl	0:d9266031f832	1050	#endif
mafischl	0:d9266031f832	1051
mafischl	0:d9266031f832	1052	err_t
mafischl	0:d9266031f832	1053	pppoe_xmit(struct pppoe_softc sc, struct pbuf pb)
mafischl	0:d9266031f832	1054	{
mafischl	0:d9266031f832	1055	u8_t *p;
mafischl	0:d9266031f832	1056	size_t len;
mafischl	0:d9266031f832	1057
mafischl	0:d9266031f832	1058	/* are we ready to process data yet? */
mafischl	0:d9266031f832	1059	if (sc->sc_state < PPPOE_STATE_SESSION) {
mafischl	0:d9266031f832	1060	/sppp_flush(&sc->sc_sppp.pp_if);/
mafischl	0:d9266031f832	1061	pbuf_free(pb);
mafischl	0:d9266031f832	1062	return ERR_CONN;
mafischl	0:d9266031f832	1063	}
mafischl	0:d9266031f832	1064
mafischl	0:d9266031f832	1065	len = pb->tot_len;
mafischl	0:d9266031f832	1066
mafischl	0:d9266031f832	1067	/* make room for Ethernet header - should not fail */
mafischl	0:d9266031f832	1068	if (pbuf_header(pb, sizeof(struct eth_hdr) + PPPOE_HEADERLEN) != 0) {
mafischl	0:d9266031f832	1069	/* bail out */
mafischl	0:d9266031f832	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));
mafischl	0:d9266031f832	1071	LINK_STATS_INC(link.lenerr);
mafischl	0:d9266031f832	1072	pbuf_free(pb);
mafischl	0:d9266031f832	1073	return ERR_BUF;
mafischl	0:d9266031f832	1074	}
mafischl	0:d9266031f832	1075
mafischl	0:d9266031f832	1076	p = (u8_t*)pb->payload + sizeof(struct eth_hdr);
mafischl	0:d9266031f832	1077	PPPOE_ADD_HEADER(p, 0, sc->sc_session, len);
mafischl	0:d9266031f832	1078
mafischl	0:d9266031f832	1079	return pppoe_output(sc, pb);
mafischl	0:d9266031f832	1080	}
mafischl	0:d9266031f832	1081
mafischl	0:d9266031f832	1082	#if 0 /def PFIL_HOOKS/
mafischl	0:d9266031f832	1083	static int
mafischl	0:d9266031f832	1084	pppoe_ifattach_hook(void arg, struct pbuf mp, struct netif ifp, int dir)
mafischl	0:d9266031f832	1085	{
mafischl	0:d9266031f832	1086	struct pppoe_softc *sc;
mafischl	0:d9266031f832	1087	int s;
mafischl	0:d9266031f832	1088
mafischl	0:d9266031f832	1089	if (mp != (struct pbuf **)PFIL_IFNET_DETACH) {
mafischl	0:d9266031f832	1090	return 0;
mafischl	0:d9266031f832	1091	}
mafischl	0:d9266031f832	1092
mafischl	0:d9266031f832	1093	LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
mafischl	0:d9266031f832	1094	if (sc->sc_ethif != ifp) {
mafischl	0:d9266031f832	1095	continue;
mafischl	0:d9266031f832	1096	}
mafischl	0:d9266031f832	1097	if (sc->sc_sppp.pp_if.if_flags & IFF_UP) {
mafischl	0:d9266031f832	1098	sc->sc_sppp.pp_if.if_flags &= ~(IFF_UP\|IFF_RUNNING);
mafischl	0:d9266031f832	1099	printf("%c%c%"U16_F": ethernet interface detached, going down\n",
mafischl	0:d9266031f832	1100	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
mafischl	0:d9266031f832	1101	}
mafischl	0:d9266031f832	1102	sc->sc_ethif = NULL;
mafischl	0:d9266031f832	1103	pppoe_clear_softc(sc, "ethernet interface detached");
mafischl	0:d9266031f832	1104	}
mafischl	0:d9266031f832	1105
mafischl	0:d9266031f832	1106	return 0;
mafischl	0:d9266031f832	1107	}
mafischl	0:d9266031f832	1108	#endif
mafischl	0:d9266031f832	1109
mafischl	0:d9266031f832	1110	static void
mafischl	0:d9266031f832	1111	pppoe_clear_softc(struct pppoe_softc sc, const char message)
mafischl	0:d9266031f832	1112	{
mafischl	0:d9266031f832	1113	LWIP_UNUSED_ARG(message);
mafischl	0:d9266031f832	1114
mafischl	0:d9266031f832	1115	/* stop timer */
mafischl	0:d9266031f832	1116	sys_untimeout(pppoe_timeout, sc);
mafischl	0:d9266031f832	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));
mafischl	0:d9266031f832	1118
mafischl	0:d9266031f832	1119	/* fix our state */
mafischl	0:d9266031f832	1120	sc->sc_state = PPPOE_STATE_INITIAL;
mafischl	0:d9266031f832	1121
mafischl	0:d9266031f832	1122	/* notify upper layers */
mafischl	0:d9266031f832	1123	sc->sc_linkStatusCB(sc->sc_pd, 0);
mafischl	0:d9266031f832	1124
mafischl	0:d9266031f832	1125	/* clean up softc */
mafischl	0:d9266031f832	1126	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
mafischl	0:d9266031f832	1127	sc->sc_ac_cookie_len = 0;
mafischl	0:d9266031f832	1128	sc->sc_session = 0;
mafischl	0:d9266031f832	1129	}
mafischl	0:d9266031f832	1130
mafischl	0:d9266031f832	1131	#endif /* PPPOE_SUPPORT */
mafischl	0:d9266031f832	1132

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	13 Oct 2011
Imports:	90
Forks:	0
Commits:	2
Dependents:	0
Dependencies:	1
Followers:	3

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NetServices/lwip/netif/ppp/ppp_oe.c@0:d9266031f832, 2011-10-13 (annotated)

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NetServices/lwip/netif/ppp/ppp_oe.c@0:d9266031f832, 2011-10-13 (annotated)

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