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lwip/netif/ppp/ppp_oe.c@0:d616ece2d859, 2010-09-18 (annotated)

Committer:: mbed714
Date:: Sat Sep 18 23:05:49 2010 +0000
Revision:: 0:d616ece2d859

Who changed what in which revision?

User	Revision	Line number	New contents of line
mbed714	0:d616ece2d859	1	/*****************************************************************************
mbed714	0:d616ece2d859	2	* ppp_oe.c - PPP Over Ethernet implementation for lwIP.
mbed714	0:d616ece2d859	3	*
mbed714	0:d616ece2d859	4	* Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc.
mbed714	0:d616ece2d859	5	*
mbed714	0:d616ece2d859	6	* The authors hereby grant permission to use, copy, modify, distribute,
mbed714	0:d616ece2d859	7	* and license this software and its documentation for any purpose, provided
mbed714	0:d616ece2d859	8	* that existing copyright notices are retained in all copies and that this
mbed714	0:d616ece2d859	9	* notice and the following disclaimer are included verbatim in any
mbed714	0:d616ece2d859	10	* distributions. No written agreement, license, or royalty fee is required
mbed714	0:d616ece2d859	11	* for any of the authorized uses.
mbed714	0:d616ece2d859	12	*
mbed714	0:d616ece2d859	13	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
mbed714	0:d616ece2d859	14	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
mbed714	0:d616ece2d859	15	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
mbed714	0:d616ece2d859	16	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
mbed714	0:d616ece2d859	17	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
mbed714	0:d616ece2d859	18	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
mbed714	0:d616ece2d859	19	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
mbed714	0:d616ece2d859	20	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
mbed714	0:d616ece2d859	21	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
mbed714	0:d616ece2d859	22	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed714	0:d616ece2d859	23	*
mbed714	0:d616ece2d859	24	******************************************************************************
mbed714	0:d616ece2d859	25	* REVISION HISTORY
mbed714	0:d616ece2d859	26	*
mbed714	0:d616ece2d859	27	* 06-01-01 Marc Boucher <marc@mbsi.ca>
mbed714	0:d616ece2d859	28	* Ported to lwIP.
mbed714	0:d616ece2d859	29	*****************************************************************************/
mbed714	0:d616ece2d859	30
mbed714	0:d616ece2d859	31
mbed714	0:d616ece2d859	32
mbed714	0:d616ece2d859	33	/* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */
mbed714	0:d616ece2d859	34
mbed714	0:d616ece2d859	35	/*-
mbed714	0:d616ece2d859	36	* Copyright (c) 2002 The NetBSD Foundation, Inc.
mbed714	0:d616ece2d859	37	* All rights reserved.
mbed714	0:d616ece2d859	38	*
mbed714	0:d616ece2d859	39	* This code is derived from software contributed to The NetBSD Foundation
mbed714	0:d616ece2d859	40	* by Martin Husemann <martin@NetBSD.org>.
mbed714	0:d616ece2d859	41	*
mbed714	0:d616ece2d859	42	* Redistribution and use in source and binary forms, with or without
mbed714	0:d616ece2d859	43	* modification, are permitted provided that the following conditions
mbed714	0:d616ece2d859	44	* are met:
mbed714	0:d616ece2d859	45	* 1. Redistributions of source code must retain the above copyright
mbed714	0:d616ece2d859	46	* notice, this list of conditions and the following disclaimer.
mbed714	0:d616ece2d859	47	* 2. Redistributions in binary form must reproduce the above copyright
mbed714	0:d616ece2d859	48	* notice, this list of conditions and the following disclaimer in the
mbed714	0:d616ece2d859	49	* documentation and/or other materials provided with the distribution.
mbed714	0:d616ece2d859	50	* 3. All advertising materials mentioning features or use of this software
mbed714	0:d616ece2d859	51	* must display the following acknowledgement:
mbed714	0:d616ece2d859	52	* This product includes software developed by the NetBSD
mbed714	0:d616ece2d859	53	* Foundation, Inc. and its contributors.
mbed714	0:d616ece2d859	54	* 4. Neither the name of The NetBSD Foundation nor the names of its
mbed714	0:d616ece2d859	55	* contributors may be used to endorse or promote products derived
mbed714	0:d616ece2d859	56	* from this software without specific prior written permission.
mbed714	0:d616ece2d859	57	*
mbed714	0:d616ece2d859	58	* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
mbed714	0:d616ece2d859	59	* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
mbed714	0:d616ece2d859	60	* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
mbed714	0:d616ece2d859	61	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
mbed714	0:d616ece2d859	62	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
mbed714	0:d616ece2d859	63	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
mbed714	0:d616ece2d859	64	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mbed714	0:d616ece2d859	65	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mbed714	0:d616ece2d859	66	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
mbed714	0:d616ece2d859	67	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mbed714	0:d616ece2d859	68	* POSSIBILITY OF SUCH DAMAGE.
mbed714	0:d616ece2d859	69	*/
mbed714	0:d616ece2d859	70
mbed714	0:d616ece2d859	71	#include "lwip/opt.h"
mbed714	0:d616ece2d859	72
mbed714	0:d616ece2d859	73	#if PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */
mbed714	0:d616ece2d859	74
mbed714	0:d616ece2d859	75	#include "netif/ppp_oe.h"
mbed714	0:d616ece2d859	76
mbed714	0:d616ece2d859	77	#include "ppp.h"
mbed714	0:d616ece2d859	78	#include "pppdebug.h"
mbed714	0:d616ece2d859	79
mbed714	0:d616ece2d859	80	#include "lwip/timers.h"
mbed714	0:d616ece2d859	81	#include "lwip/memp.h"
mbed714	0:d616ece2d859	82
mbed714	0:d616ece2d859	83	#include <string.h>
mbed714	0:d616ece2d859	84	#include <stdio.h>
mbed714	0:d616ece2d859	85
mbed714	0:d616ece2d859	86
mbed714	0:d616ece2d859	87	/* Add a 16 bit unsigned value to a buffer pointed to by PTR */
mbed714	0:d616ece2d859	88	#define PPPOE_ADD_16(PTR, VAL) \
mbed714	0:d616ece2d859	89	*(PTR)++ = (u8_t)((VAL) / 256); \
mbed714	0:d616ece2d859	90	*(PTR)++ = (u8_t)((VAL) % 256)
mbed714	0:d616ece2d859	91
mbed714	0:d616ece2d859	92	/* Add a complete PPPoE header to the buffer pointed to by PTR */
mbed714	0:d616ece2d859	93	#define PPPOE_ADD_HEADER(PTR, CODE, SESS, LEN) \
mbed714	0:d616ece2d859	94	*(PTR)++ = PPPOE_VERTYPE; \
mbed714	0:d616ece2d859	95	*(PTR)++ = (CODE); \
mbed714	0:d616ece2d859	96	PPPOE_ADD_16(PTR, SESS); \
mbed714	0:d616ece2d859	97	PPPOE_ADD_16(PTR, LEN)
mbed714	0:d616ece2d859	98
mbed714	0:d616ece2d859	99	#define PPPOE_DISC_TIMEOUT (51000) / base for quick timeout calculation */
mbed714	0:d616ece2d859	100	#define PPPOE_SLOW_RETRY (601000) / persistent retry interval */
mbed714	0:d616ece2d859	101	#define PPPOE_DISC_MAXPADI 4 /* retry PADI four times (quickly) */
mbed714	0:d616ece2d859	102	#define PPPOE_DISC_MAXPADR 2 /* retry PADR twice */
mbed714	0:d616ece2d859	103
mbed714	0:d616ece2d859	104	#ifdef PPPOE_SERVER
mbed714	0:d616ece2d859	105	#error "PPPOE_SERVER is not yet supported under lwIP!"
mbed714	0:d616ece2d859	106	/* from if_spppsubr.c */
mbed714	0:d616ece2d859	107	#define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
mbed714	0:d616ece2d859	108	#endif
mbed714	0:d616ece2d859	109
mbed714	0:d616ece2d859	110	#ifndef PPPOE_ERRORSTRING_LEN
mbed714	0:d616ece2d859	111	#define PPPOE_ERRORSTRING_LEN 64
mbed714	0:d616ece2d859	112	#endif
mbed714	0:d616ece2d859	113	static char pppoe_error_tmp[PPPOE_ERRORSTRING_LEN];
mbed714	0:d616ece2d859	114
mbed714	0:d616ece2d859	115
mbed714	0:d616ece2d859	116	/* input routines */
mbed714	0:d616ece2d859	117	static void pppoe_dispatch_disc_pkt(struct netif , struct pbuf );
mbed714	0:d616ece2d859	118
mbed714	0:d616ece2d859	119	/* management routines */
mbed714	0:d616ece2d859	120	static int pppoe_do_disconnect(struct pppoe_softc *);
mbed714	0:d616ece2d859	121	static void pppoe_abort_connect(struct pppoe_softc *);
mbed714	0:d616ece2d859	122	static void pppoe_clear_softc(struct pppoe_softc , const char );
mbed714	0:d616ece2d859	123
mbed714	0:d616ece2d859	124	/* internal timeout handling */
mbed714	0:d616ece2d859	125	static void pppoe_timeout(void *);
mbed714	0:d616ece2d859	126
mbed714	0:d616ece2d859	127	/* sending actual protocol controll packets */
mbed714	0:d616ece2d859	128	static err_t pppoe_send_padi(struct pppoe_softc *);
mbed714	0:d616ece2d859	129	static err_t pppoe_send_padr(struct pppoe_softc *);
mbed714	0:d616ece2d859	130	#ifdef PPPOE_SERVER
mbed714	0:d616ece2d859	131	static err_t pppoe_send_pado(struct pppoe_softc *);
mbed714	0:d616ece2d859	132	static err_t pppoe_send_pads(struct pppoe_softc *);
mbed714	0:d616ece2d859	133	#endif
mbed714	0:d616ece2d859	134	static err_t pppoe_send_padt(struct netif , u_int, const u8_t );
mbed714	0:d616ece2d859	135
mbed714	0:d616ece2d859	136	/* internal helper functions */
mbed714	0:d616ece2d859	137	static struct pppoe_softc * pppoe_find_softc_by_session(u_int, struct netif *);
mbed714	0:d616ece2d859	138	static struct pppoe_softc * pppoe_find_softc_by_hunique(u8_t , size_t, struct netif );
mbed714	0:d616ece2d859	139
mbed714	0:d616ece2d859	140	/** linked list of created pppoe interfaces */
mbed714	0:d616ece2d859	141	static struct pppoe_softc *pppoe_softc_list;
mbed714	0:d616ece2d859	142
mbed714	0:d616ece2d859	143	err_t
mbed714	0:d616ece2d859	144	pppoe_create(struct netif ethif, int pd, void (linkStatusCB)(int pd, int up), struct pppoe_softc **scptr)
mbed714	0:d616ece2d859	145	{
mbed714	0:d616ece2d859	146	struct pppoe_softc *sc;
mbed714	0:d616ece2d859	147
mbed714	0:d616ece2d859	148	sc = (struct pppoe_softc *)memp_malloc(MEMP_PPPOE_IF);
mbed714	0:d616ece2d859	149	if (sc == NULL) {
mbed714	0:d616ece2d859	150	*scptr = NULL;
mbed714	0:d616ece2d859	151	return ERR_MEM;
mbed714	0:d616ece2d859	152	}
mbed714	0:d616ece2d859	153	memset(sc, 0, sizeof(struct pppoe_softc));
mbed714	0:d616ece2d859	154
mbed714	0:d616ece2d859	155	/* changed to real address later */
mbed714	0:d616ece2d859	156	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
mbed714	0:d616ece2d859	157
mbed714	0:d616ece2d859	158	sc->sc_pd = pd;
mbed714	0:d616ece2d859	159	sc->sc_linkStatusCB = linkStatusCB;
mbed714	0:d616ece2d859	160	sc->sc_ethif = ethif;
mbed714	0:d616ece2d859	161
mbed714	0:d616ece2d859	162	/* put the new interface at the head of the list */
mbed714	0:d616ece2d859	163	sc->next = pppoe_softc_list;
mbed714	0:d616ece2d859	164	pppoe_softc_list = sc;
mbed714	0:d616ece2d859	165
mbed714	0:d616ece2d859	166	*scptr = sc;
mbed714	0:d616ece2d859	167
mbed714	0:d616ece2d859	168	return ERR_OK;
mbed714	0:d616ece2d859	169	}
mbed714	0:d616ece2d859	170
mbed714	0:d616ece2d859	171	err_t
mbed714	0:d616ece2d859	172	pppoe_destroy(struct netif *ifp)
mbed714	0:d616ece2d859	173	{
mbed714	0:d616ece2d859	174	struct pppoe_softc sc, prev = NULL;
mbed714	0:d616ece2d859	175
mbed714	0:d616ece2d859	176	for (sc = pppoe_softc_list; sc != NULL; prev = sc, sc = sc->next) {
mbed714	0:d616ece2d859	177	if (sc->sc_ethif == ifp) {
mbed714	0:d616ece2d859	178	break;
mbed714	0:d616ece2d859	179	}
mbed714	0:d616ece2d859	180	}
mbed714	0:d616ece2d859	181
mbed714	0:d616ece2d859	182	if(!(sc && (sc->sc_ethif == ifp))) {
mbed714	0:d616ece2d859	183	return ERR_IF;
mbed714	0:d616ece2d859	184	}
mbed714	0:d616ece2d859	185
mbed714	0:d616ece2d859	186	sys_untimeout(pppoe_timeout, sc);
mbed714	0:d616ece2d859	187	if (prev == NULL) {
mbed714	0:d616ece2d859	188	/* remove sc from the head of the list */
mbed714	0:d616ece2d859	189	pppoe_softc_list = sc->next;
mbed714	0:d616ece2d859	190	} else {
mbed714	0:d616ece2d859	191	/* remove sc from the list */
mbed714	0:d616ece2d859	192	prev->next = sc->next;
mbed714	0:d616ece2d859	193	}
mbed714	0:d616ece2d859	194
mbed714	0:d616ece2d859	195	#ifdef PPPOE_TODO
mbed714	0:d616ece2d859	196	if (sc->sc_concentrator_name) {
mbed714	0:d616ece2d859	197	mem_free(sc->sc_concentrator_name);
mbed714	0:d616ece2d859	198	}
mbed714	0:d616ece2d859	199	if (sc->sc_service_name) {
mbed714	0:d616ece2d859	200	mem_free(sc->sc_service_name);
mbed714	0:d616ece2d859	201	}
mbed714	0:d616ece2d859	202	#endif /* PPPOE_TODO */
mbed714	0:d616ece2d859	203	memp_free(MEMP_PPPOE_IF, sc);
mbed714	0:d616ece2d859	204
mbed714	0:d616ece2d859	205	return ERR_OK;
mbed714	0:d616ece2d859	206	}
mbed714	0:d616ece2d859	207
mbed714	0:d616ece2d859	208	/*
mbed714	0:d616ece2d859	209	* Find the interface handling the specified session.
mbed714	0:d616ece2d859	210	* Note: O(number of sessions open), this is a client-side only, mean
mbed714	0:d616ece2d859	211	* and lean implementation, so number of open sessions typically should
mbed714	0:d616ece2d859	212	* be 1.
mbed714	0:d616ece2d859	213	*/
mbed714	0:d616ece2d859	214	static struct pppoe_softc *
mbed714	0:d616ece2d859	215	pppoe_find_softc_by_session(u_int session, struct netif *rcvif)
mbed714	0:d616ece2d859	216	{
mbed714	0:d616ece2d859	217	struct pppoe_softc *sc;
mbed714	0:d616ece2d859	218
mbed714	0:d616ece2d859	219	if (session == 0) {
mbed714	0:d616ece2d859	220	return NULL;
mbed714	0:d616ece2d859	221	}
mbed714	0:d616ece2d859	222
mbed714	0:d616ece2d859	223	for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
mbed714	0:d616ece2d859	224	if (sc->sc_state == PPPOE_STATE_SESSION
mbed714	0:d616ece2d859	225	&& sc->sc_session == session) {
mbed714	0:d616ece2d859	226	if (sc->sc_ethif == rcvif) {
mbed714	0:d616ece2d859	227	return sc;
mbed714	0:d616ece2d859	228	} else {
mbed714	0:d616ece2d859	229	return NULL;
mbed714	0:d616ece2d859	230	}
mbed714	0:d616ece2d859	231	}
mbed714	0:d616ece2d859	232	}
mbed714	0:d616ece2d859	233	return NULL;
mbed714	0:d616ece2d859	234	}
mbed714	0:d616ece2d859	235
mbed714	0:d616ece2d859	236	/* Check host unique token passed and return appropriate softc pointer,
mbed714	0:d616ece2d859	237	* or NULL if token is bogus. */
mbed714	0:d616ece2d859	238	static struct pppoe_softc *
mbed714	0:d616ece2d859	239	pppoe_find_softc_by_hunique(u8_t token, size_t len, struct netif rcvif)
mbed714	0:d616ece2d859	240	{
mbed714	0:d616ece2d859	241	struct pppoe_softc sc, t;
mbed714	0:d616ece2d859	242
mbed714	0:d616ece2d859	243	if (pppoe_softc_list == NULL) {
mbed714	0:d616ece2d859	244	return NULL;
mbed714	0:d616ece2d859	245	}
mbed714	0:d616ece2d859	246
mbed714	0:d616ece2d859	247	if (len != sizeof sc) {
mbed714	0:d616ece2d859	248	return NULL;
mbed714	0:d616ece2d859	249	}
mbed714	0:d616ece2d859	250	MEMCPY(&t, token, len);
mbed714	0:d616ece2d859	251
mbed714	0:d616ece2d859	252	for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
mbed714	0:d616ece2d859	253	if (sc == t) {
mbed714	0:d616ece2d859	254	break;
mbed714	0:d616ece2d859	255	}
mbed714	0:d616ece2d859	256	}
mbed714	0:d616ece2d859	257
mbed714	0:d616ece2d859	258	if (sc == NULL) {
mbed714	0:d616ece2d859	259	PPPDEBUG(LOG_DEBUG, ("pppoe: alien host unique tag, no session found\n"));
mbed714	0:d616ece2d859	260	return NULL;
mbed714	0:d616ece2d859	261	}
mbed714	0:d616ece2d859	262
mbed714	0:d616ece2d859	263	/* should be safe to access sc now /
mbed714	0:d616ece2d859	264	if (sc->sc_state < PPPOE_STATE_PADI_SENT \|\| sc->sc_state >= PPPOE_STATE_SESSION) {
mbed714	0:d616ece2d859	265	printf("%c%c%"U16_F": host unique tag found, but it belongs to a connection in state %d\n",
mbed714	0:d616ece2d859	266	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_state);
mbed714	0:d616ece2d859	267	return NULL;
mbed714	0:d616ece2d859	268	}
mbed714	0:d616ece2d859	269	if (sc->sc_ethif != rcvif) {
mbed714	0:d616ece2d859	270	printf("%c%c%"U16_F": wrong interface, not accepting host unique\n",
mbed714	0:d616ece2d859	271	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
mbed714	0:d616ece2d859	272	return NULL;
mbed714	0:d616ece2d859	273	}
mbed714	0:d616ece2d859	274	return sc;
mbed714	0:d616ece2d859	275	}
mbed714	0:d616ece2d859	276
mbed714	0:d616ece2d859	277	static void
mbed714	0:d616ece2d859	278	pppoe_linkstatus_up(struct pppoe_softc *sc)
mbed714	0:d616ece2d859	279	{
mbed714	0:d616ece2d859	280	sc->sc_linkStatusCB(sc->sc_pd, 1);
mbed714	0:d616ece2d859	281	}
mbed714	0:d616ece2d859	282
mbed714	0:d616ece2d859	283	/* analyze and handle a single received packet while not in session state */
mbed714	0:d616ece2d859	284	static void
mbed714	0:d616ece2d859	285	pppoe_dispatch_disc_pkt(struct netif netif, struct pbuf pb)
mbed714	0:d616ece2d859	286	{
mbed714	0:d616ece2d859	287	u16_t tag, len;
mbed714	0:d616ece2d859	288	u16_t session, plen;
mbed714	0:d616ece2d859	289	struct pppoe_softc *sc;
mbed714	0:d616ece2d859	290	const char *err_msg;
mbed714	0:d616ece2d859	291	char devname[6];
mbed714	0:d616ece2d859	292	u8_t *ac_cookie;
mbed714	0:d616ece2d859	293	u16_t ac_cookie_len;
mbed714	0:d616ece2d859	294	#ifdef PPPOE_SERVER
mbed714	0:d616ece2d859	295	u8_t *hunique;
mbed714	0:d616ece2d859	296	size_t hunique_len;
mbed714	0:d616ece2d859	297	#endif
mbed714	0:d616ece2d859	298	struct pppoehdr *ph;
mbed714	0:d616ece2d859	299	struct pppoetag pt;
mbed714	0:d616ece2d859	300	int off, err, errortag;
mbed714	0:d616ece2d859	301	struct eth_hdr *ethhdr;
mbed714	0:d616ece2d859	302
mbed714	0:d616ece2d859	303	pb = pppSingleBuf(pb);
mbed714	0:d616ece2d859	304
mbed714	0:d616ece2d859	305	strcpy(devname, "pppoe"); /* as long as we don't know which instance */
mbed714	0:d616ece2d859	306	err_msg = NULL;
mbed714	0:d616ece2d859	307	errortag = 0;
mbed714	0:d616ece2d859	308	if (pb->len < sizeof(*ethhdr)) {
mbed714	0:d616ece2d859	309	goto done;
mbed714	0:d616ece2d859	310	}
mbed714	0:d616ece2d859	311	ethhdr = (struct eth_hdr *)pb->payload;
mbed714	0:d616ece2d859	312	off = sizeof(*ethhdr);
mbed714	0:d616ece2d859	313
mbed714	0:d616ece2d859	314	ac_cookie = NULL;
mbed714	0:d616ece2d859	315	ac_cookie_len = 0;
mbed714	0:d616ece2d859	316	#ifdef PPPOE_SERVER
mbed714	0:d616ece2d859	317	hunique = NULL;
mbed714	0:d616ece2d859	318	hunique_len = 0;
mbed714	0:d616ece2d859	319	#endif
mbed714	0:d616ece2d859	320	session = 0;
mbed714	0:d616ece2d859	321	if (pb->len - off < PPPOE_HEADERLEN) {
mbed714	0:d616ece2d859	322	printf("pppoe: packet too short: %d\n", pb->len);
mbed714	0:d616ece2d859	323	goto done;
mbed714	0:d616ece2d859	324	}
mbed714	0:d616ece2d859	325
mbed714	0:d616ece2d859	326	ph = (struct pppoehdr *) (ethhdr + 1);
mbed714	0:d616ece2d859	327	if (ph->vertype != PPPOE_VERTYPE) {
mbed714	0:d616ece2d859	328	printf("pppoe: unknown version/type packet: 0x%x\n", ph->vertype);
mbed714	0:d616ece2d859	329	goto done;
mbed714	0:d616ece2d859	330	}
mbed714	0:d616ece2d859	331	session = ntohs(ph->session);
mbed714	0:d616ece2d859	332	plen = ntohs(ph->plen);
mbed714	0:d616ece2d859	333	off += sizeof(*ph);
mbed714	0:d616ece2d859	334
mbed714	0:d616ece2d859	335	if (plen + off > pb->len) {
mbed714	0:d616ece2d859	336	printf("pppoe: packet content does not fit: data available = %d, packet size = %u\n",
mbed714	0:d616ece2d859	337	pb->len - off, plen);
mbed714	0:d616ece2d859	338	goto done;
mbed714	0:d616ece2d859	339	}
mbed714	0:d616ece2d859	340	if(pb->tot_len == pb->len) {
mbed714	0:d616ece2d859	341	pb->tot_len = pb->len = (u16_t)off + plen; /* ignore trailing garbage */
mbed714	0:d616ece2d859	342	}
mbed714	0:d616ece2d859	343	tag = 0;
mbed714	0:d616ece2d859	344	len = 0;
mbed714	0:d616ece2d859	345	sc = NULL;
mbed714	0:d616ece2d859	346	while (off + sizeof(pt) <= pb->len) {
mbed714	0:d616ece2d859	347	MEMCPY(&pt, (u8_t*)pb->payload + off, sizeof(pt));
mbed714	0:d616ece2d859	348	tag = ntohs(pt.tag);
mbed714	0:d616ece2d859	349	len = ntohs(pt.len);
mbed714	0:d616ece2d859	350	if (off + sizeof(pt) + len > pb->len) {
mbed714	0:d616ece2d859	351	printf("pppoe: tag 0x%x len 0x%x is too long\n", tag, len);
mbed714	0:d616ece2d859	352	goto done;
mbed714	0:d616ece2d859	353	}
mbed714	0:d616ece2d859	354	switch (tag) {
mbed714	0:d616ece2d859	355	case PPPOE_TAG_EOL:
mbed714	0:d616ece2d859	356	goto breakbreak;
mbed714	0:d616ece2d859	357	case PPPOE_TAG_SNAME:
mbed714	0:d616ece2d859	358	break; /* ignored */
mbed714	0:d616ece2d859	359	case PPPOE_TAG_ACNAME:
mbed714	0:d616ece2d859	360	break; /* ignored */
mbed714	0:d616ece2d859	361	case PPPOE_TAG_HUNIQUE:
mbed714	0:d616ece2d859	362	if (sc != NULL) {
mbed714	0:d616ece2d859	363	break;
mbed714	0:d616ece2d859	364	}
mbed714	0:d616ece2d859	365	#ifdef PPPOE_SERVER
mbed714	0:d616ece2d859	366	hunique = (u8_t*)pb->payload + off + sizeof(pt);
mbed714	0:d616ece2d859	367	hunique_len = len;
mbed714	0:d616ece2d859	368	#endif
mbed714	0:d616ece2d859	369	sc = pppoe_find_softc_by_hunique((u8_t*)pb->payload + off + sizeof(pt), len, netif);
mbed714	0:d616ece2d859	370	if (sc != NULL) {
mbed714	0:d616ece2d859	371	snprintf(devname, sizeof(devname), "%c%c%"U16_F, sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
mbed714	0:d616ece2d859	372	}
mbed714	0:d616ece2d859	373	break;
mbed714	0:d616ece2d859	374	case PPPOE_TAG_ACCOOKIE:
mbed714	0:d616ece2d859	375	if (ac_cookie == NULL) {
mbed714	0:d616ece2d859	376	ac_cookie = (u8_t*)pb->payload + off + sizeof(pt);
mbed714	0:d616ece2d859	377	ac_cookie_len = len;
mbed714	0:d616ece2d859	378	}
mbed714	0:d616ece2d859	379	break;
mbed714	0:d616ece2d859	380	case PPPOE_TAG_SNAME_ERR:
mbed714	0:d616ece2d859	381	err_msg = "SERVICE NAME ERROR";
mbed714	0:d616ece2d859	382	errortag = 1;
mbed714	0:d616ece2d859	383	break;
mbed714	0:d616ece2d859	384	case PPPOE_TAG_ACSYS_ERR:
mbed714	0:d616ece2d859	385	err_msg = "AC SYSTEM ERROR";
mbed714	0:d616ece2d859	386	errortag = 1;
mbed714	0:d616ece2d859	387	break;
mbed714	0:d616ece2d859	388	case PPPOE_TAG_GENERIC_ERR:
mbed714	0:d616ece2d859	389	err_msg = "GENERIC ERROR";
mbed714	0:d616ece2d859	390	errortag = 1;
mbed714	0:d616ece2d859	391	break;
mbed714	0:d616ece2d859	392	}
mbed714	0:d616ece2d859	393	if (err_msg) {
mbed714	0:d616ece2d859	394	if (errortag && len) {
mbed714	0:d616ece2d859	395	u16_t error_len = LWIP_MIN(len, sizeof(pppoe_error_tmp)-1);
mbed714	0:d616ece2d859	396	strncpy(pppoe_error_tmp, (char*)pb->payload + off + sizeof(pt), error_len);
mbed714	0:d616ece2d859	397	pppoe_error_tmp[error_len-1] = '\0';
mbed714	0:d616ece2d859	398	printf("%s: %s: %s\n", devname, err_msg, pppoe_error_tmp);
mbed714	0:d616ece2d859	399	} else {
mbed714	0:d616ece2d859	400	printf("%s: %s\n", devname, err_msg);
mbed714	0:d616ece2d859	401	}
mbed714	0:d616ece2d859	402	if (errortag) {
mbed714	0:d616ece2d859	403	goto done;
mbed714	0:d616ece2d859	404	}
mbed714	0:d616ece2d859	405	}
mbed714	0:d616ece2d859	406	off += sizeof(pt) + len;
mbed714	0:d616ece2d859	407	}
mbed714	0:d616ece2d859	408
mbed714	0:d616ece2d859	409	breakbreak:;
mbed714	0:d616ece2d859	410	switch (ph->code) {
mbed714	0:d616ece2d859	411	case PPPOE_CODE_PADI:
mbed714	0:d616ece2d859	412	#ifdef PPPOE_SERVER
mbed714	0:d616ece2d859	413	/*
mbed714	0:d616ece2d859	414	* got service name, concentrator name, and/or host unique.
mbed714	0:d616ece2d859	415	* ignore if we have no interfaces with IFF_PASSIVE\|IFF_UP.
mbed714	0:d616ece2d859	416	*/
mbed714	0:d616ece2d859	417	if (LIST_EMPTY(&pppoe_softc_list)) {
mbed714	0:d616ece2d859	418	goto done;
mbed714	0:d616ece2d859	419	}
mbed714	0:d616ece2d859	420	LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
mbed714	0:d616ece2d859	421	if (!(sc->sc_sppp.pp_if.if_flags & IFF_UP)) {
mbed714	0:d616ece2d859	422	continue;
mbed714	0:d616ece2d859	423	}
mbed714	0:d616ece2d859	424	if (!(sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
mbed714	0:d616ece2d859	425	continue;
mbed714	0:d616ece2d859	426	}
mbed714	0:d616ece2d859	427	if (sc->sc_state == PPPOE_STATE_INITIAL) {
mbed714	0:d616ece2d859	428	break;
mbed714	0:d616ece2d859	429	}
mbed714	0:d616ece2d859	430	}
mbed714	0:d616ece2d859	431	if (sc == NULL) {
mbed714	0:d616ece2d859	432	/* printf("pppoe: free passive interface is not found\n"); */
mbed714	0:d616ece2d859	433	goto done;
mbed714	0:d616ece2d859	434	}
mbed714	0:d616ece2d859	435	if (hunique) {
mbed714	0:d616ece2d859	436	if (sc->sc_hunique) {
mbed714	0:d616ece2d859	437	mem_free(sc->sc_hunique);
mbed714	0:d616ece2d859	438	}
mbed714	0:d616ece2d859	439	sc->sc_hunique = mem_malloc(hunique_len);
mbed714	0:d616ece2d859	440	if (sc->sc_hunique == NULL) {
mbed714	0:d616ece2d859	441	goto done;
mbed714	0:d616ece2d859	442	}
mbed714	0:d616ece2d859	443	sc->sc_hunique_len = hunique_len;
mbed714	0:d616ece2d859	444	MEMCPY(sc->sc_hunique, hunique, hunique_len);
mbed714	0:d616ece2d859	445	}
mbed714	0:d616ece2d859	446	MEMCPY(&sc->sc_dest, eh->ether_shost, sizeof sc->sc_dest);
mbed714	0:d616ece2d859	447	sc->sc_state = PPPOE_STATE_PADO_SENT;
mbed714	0:d616ece2d859	448	pppoe_send_pado(sc);
mbed714	0:d616ece2d859	449	break;
mbed714	0:d616ece2d859	450	#endif /* PPPOE_SERVER */
mbed714	0:d616ece2d859	451	case PPPOE_CODE_PADR:
mbed714	0:d616ece2d859	452	#ifdef PPPOE_SERVER
mbed714	0:d616ece2d859	453	/*
mbed714	0:d616ece2d859	454	* get sc from ac_cookie if IFF_PASSIVE
mbed714	0:d616ece2d859	455	*/
mbed714	0:d616ece2d859	456	if (ac_cookie == NULL) {
mbed714	0:d616ece2d859	457	/* be quiet if there is not a single pppoe instance */
mbed714	0:d616ece2d859	458	printf("pppoe: received PADR but not includes ac_cookie\n");
mbed714	0:d616ece2d859	459	goto done;
mbed714	0:d616ece2d859	460	}
mbed714	0:d616ece2d859	461	sc = pppoe_find_softc_by_hunique(ac_cookie, ac_cookie_len, netif);
mbed714	0:d616ece2d859	462	if (sc == NULL) {
mbed714	0:d616ece2d859	463	/* be quiet if there is not a single pppoe instance */
mbed714	0:d616ece2d859	464	if (!LIST_EMPTY(&pppoe_softc_list)) {
mbed714	0:d616ece2d859	465	printf("pppoe: received PADR but could not find request for it\n");
mbed714	0:d616ece2d859	466	}
mbed714	0:d616ece2d859	467	goto done;
mbed714	0:d616ece2d859	468	}
mbed714	0:d616ece2d859	469	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
mbed714	0:d616ece2d859	470	printf("%c%c%"U16_F": received unexpected PADR\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
mbed714	0:d616ece2d859	471	goto done;
mbed714	0:d616ece2d859	472	}
mbed714	0:d616ece2d859	473	if (hunique) {
mbed714	0:d616ece2d859	474	if (sc->sc_hunique) {
mbed714	0:d616ece2d859	475	mem_free(sc->sc_hunique);
mbed714	0:d616ece2d859	476	}
mbed714	0:d616ece2d859	477	sc->sc_hunique = mem_malloc(hunique_len);
mbed714	0:d616ece2d859	478	if (sc->sc_hunique == NULL) {
mbed714	0:d616ece2d859	479	goto done;
mbed714	0:d616ece2d859	480	}
mbed714	0:d616ece2d859	481	sc->sc_hunique_len = hunique_len;
mbed714	0:d616ece2d859	482	MEMCPY(sc->sc_hunique, hunique, hunique_len);
mbed714	0:d616ece2d859	483	}
mbed714	0:d616ece2d859	484	pppoe_send_pads(sc);
mbed714	0:d616ece2d859	485	sc->sc_state = PPPOE_STATE_SESSION;
mbed714	0:d616ece2d859	486	pppoe_linkstatus_up(sc); /* notify upper layers */
mbed714	0:d616ece2d859	487	break;
mbed714	0:d616ece2d859	488	#else
mbed714	0:d616ece2d859	489	/* ignore, we are no access concentrator */
mbed714	0:d616ece2d859	490	goto done;
mbed714	0:d616ece2d859	491	#endif /* PPPOE_SERVER */
mbed714	0:d616ece2d859	492	case PPPOE_CODE_PADO:
mbed714	0:d616ece2d859	493	if (sc == NULL) {
mbed714	0:d616ece2d859	494	/* be quiet if there is not a single pppoe instance */
mbed714	0:d616ece2d859	495	if (pppoe_softc_list != NULL) {
mbed714	0:d616ece2d859	496	printf("pppoe: received PADO but could not find request for it\n");
mbed714	0:d616ece2d859	497	}
mbed714	0:d616ece2d859	498	goto done;
mbed714	0:d616ece2d859	499	}
mbed714	0:d616ece2d859	500	if (sc->sc_state != PPPOE_STATE_PADI_SENT) {
mbed714	0:d616ece2d859	501	printf("%c%c%"U16_F": received unexpected PADO\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
mbed714	0:d616ece2d859	502	goto done;
mbed714	0:d616ece2d859	503	}
mbed714	0:d616ece2d859	504	if (ac_cookie) {
mbed714	0:d616ece2d859	505	sc->sc_ac_cookie_len = ac_cookie_len;
mbed714	0:d616ece2d859	506	MEMCPY(sc->sc_ac_cookie, ac_cookie, ac_cookie_len);
mbed714	0:d616ece2d859	507	}
mbed714	0:d616ece2d859	508	MEMCPY(&sc->sc_dest, ethhdr->src.addr, sizeof(sc->sc_dest.addr));
mbed714	0:d616ece2d859	509	sys_untimeout(pppoe_timeout, sc);
mbed714	0:d616ece2d859	510	sc->sc_padr_retried = 0;
mbed714	0:d616ece2d859	511	sc->sc_state = PPPOE_STATE_PADR_SENT;
mbed714	0:d616ece2d859	512	if ((err = pppoe_send_padr(sc)) != 0) {
mbed714	0:d616ece2d859	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));
mbed714	0:d616ece2d859	514	}
mbed714	0:d616ece2d859	515	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
mbed714	0:d616ece2d859	516	break;
mbed714	0:d616ece2d859	517	case PPPOE_CODE_PADS:
mbed714	0:d616ece2d859	518	if (sc == NULL) {
mbed714	0:d616ece2d859	519	goto done;
mbed714	0:d616ece2d859	520	}
mbed714	0:d616ece2d859	521	sc->sc_session = session;
mbed714	0:d616ece2d859	522	sys_untimeout(pppoe_timeout, sc);
mbed714	0:d616ece2d859	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));
mbed714	0:d616ece2d859	524	sc->sc_state = PPPOE_STATE_SESSION;
mbed714	0:d616ece2d859	525	pppoe_linkstatus_up(sc); /* notify upper layers */
mbed714	0:d616ece2d859	526	break;
mbed714	0:d616ece2d859	527	case PPPOE_CODE_PADT:
mbed714	0:d616ece2d859	528	if (sc == NULL) {
mbed714	0:d616ece2d859	529	goto done;
mbed714	0:d616ece2d859	530	}
mbed714	0:d616ece2d859	531	pppoe_clear_softc(sc, "received PADT");
mbed714	0:d616ece2d859	532	break;
mbed714	0:d616ece2d859	533	default:
mbed714	0:d616ece2d859	534	if(sc) {
mbed714	0:d616ece2d859	535	printf("%c%c%"U16_F": unknown code (0x%"X16_F") session = 0x%"X16_F"\n",
mbed714	0:d616ece2d859	536	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
mbed714	0:d616ece2d859	537	(u16_t)ph->code, session);
mbed714	0:d616ece2d859	538	} else {
mbed714	0:d616ece2d859	539	printf("pppoe: unknown code (0x%"X16_F") session = 0x%"X16_F"\n", (u16_t)ph->code, session);
mbed714	0:d616ece2d859	540	}
mbed714	0:d616ece2d859	541	break;
mbed714	0:d616ece2d859	542	}
mbed714	0:d616ece2d859	543
mbed714	0:d616ece2d859	544	done:
mbed714	0:d616ece2d859	545	pbuf_free(pb);
mbed714	0:d616ece2d859	546	return;
mbed714	0:d616ece2d859	547	}
mbed714	0:d616ece2d859	548
mbed714	0:d616ece2d859	549	void
mbed714	0:d616ece2d859	550	pppoe_disc_input(struct netif netif, struct pbuf p)
mbed714	0:d616ece2d859	551	{
mbed714	0:d616ece2d859	552	/* avoid error messages if there is not a single pppoe instance */
mbed714	0:d616ece2d859	553	if (pppoe_softc_list != NULL) {
mbed714	0:d616ece2d859	554	pppoe_dispatch_disc_pkt(netif, p);
mbed714	0:d616ece2d859	555	} else {
mbed714	0:d616ece2d859	556	pbuf_free(p);
mbed714	0:d616ece2d859	557	}
mbed714	0:d616ece2d859	558	}
mbed714	0:d616ece2d859	559
mbed714	0:d616ece2d859	560	void
mbed714	0:d616ece2d859	561	pppoe_data_input(struct netif netif, struct pbuf pb)
mbed714	0:d616ece2d859	562	{
mbed714	0:d616ece2d859	563	u16_t session, plen;
mbed714	0:d616ece2d859	564	struct pppoe_softc *sc;
mbed714	0:d616ece2d859	565	struct pppoehdr *ph;
mbed714	0:d616ece2d859	566	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
mbed714	0:d616ece2d859	567	u8_t shost[ETHER_ADDR_LEN];
mbed714	0:d616ece2d859	568	#endif
mbed714	0:d616ece2d859	569
mbed714	0:d616ece2d859	570	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
mbed714	0:d616ece2d859	571	MEMCPY(shost, ((struct eth_hdr *)pb->payload)->src.addr, sizeof(shost));
mbed714	0:d616ece2d859	572	#endif
mbed714	0:d616ece2d859	573	if (pbuf_header(pb, -(int)sizeof(struct eth_hdr)) != 0) {
mbed714	0:d616ece2d859	574	/* bail out */
mbed714	0:d616ece2d859	575	PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header failed\n"));
mbed714	0:d616ece2d859	576	LINK_STATS_INC(link.lenerr);
mbed714	0:d616ece2d859	577	goto drop;
mbed714	0:d616ece2d859	578	}
mbed714	0:d616ece2d859	579
mbed714	0:d616ece2d859	580	pb = pppSingleBuf (pb);
mbed714	0:d616ece2d859	581
mbed714	0:d616ece2d859	582	if (pb->len <= PPPOE_HEADERLEN) {
mbed714	0:d616ece2d859	583	printf("pppoe (data): dropping too short packet: %d bytes\n", pb->len);
mbed714	0:d616ece2d859	584	goto drop;
mbed714	0:d616ece2d859	585	}
mbed714	0:d616ece2d859	586
mbed714	0:d616ece2d859	587	if (pb->len < sizeof(*ph)) {
mbed714	0:d616ece2d859	588	printf("pppoe_data_input: could not get PPPoE header\n");
mbed714	0:d616ece2d859	589	goto drop;
mbed714	0:d616ece2d859	590	}
mbed714	0:d616ece2d859	591	ph = (struct pppoehdr *)pb->payload;
mbed714	0:d616ece2d859	592
mbed714	0:d616ece2d859	593	if (ph->vertype != PPPOE_VERTYPE) {
mbed714	0:d616ece2d859	594	printf("pppoe (data): unknown version/type packet: 0x%x\n", ph->vertype);
mbed714	0:d616ece2d859	595	goto drop;
mbed714	0:d616ece2d859	596	}
mbed714	0:d616ece2d859	597	if (ph->code != 0) {
mbed714	0:d616ece2d859	598	goto drop;
mbed714	0:d616ece2d859	599	}
mbed714	0:d616ece2d859	600
mbed714	0:d616ece2d859	601	session = ntohs(ph->session);
mbed714	0:d616ece2d859	602	sc = pppoe_find_softc_by_session(session, netif);
mbed714	0:d616ece2d859	603	if (sc == NULL) {
mbed714	0:d616ece2d859	604	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
mbed714	0:d616ece2d859	605	printf("pppoe: input for unknown session 0x%x, sending PADT\n", session);
mbed714	0:d616ece2d859	606	pppoe_send_padt(netif, session, shost);
mbed714	0:d616ece2d859	607	#endif
mbed714	0:d616ece2d859	608	goto drop;
mbed714	0:d616ece2d859	609	}
mbed714	0:d616ece2d859	610
mbed714	0:d616ece2d859	611	plen = ntohs(ph->plen);
mbed714	0:d616ece2d859	612
mbed714	0:d616ece2d859	613	if (pbuf_header(pb, -(int)(PPPOE_HEADERLEN)) != 0) {
mbed714	0:d616ece2d859	614	/* bail out */
mbed714	0:d616ece2d859	615	PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header PPPOE_HEADERLEN failed\n"));
mbed714	0:d616ece2d859	616	LINK_STATS_INC(link.lenerr);
mbed714	0:d616ece2d859	617	goto drop;
mbed714	0:d616ece2d859	618	}
mbed714	0:d616ece2d859	619
mbed714	0:d616ece2d859	620	PPPDEBUG(LOG_DEBUG, ("pppoe_data_input: %c%c%"U16_F": pkthdr.len=%d, pppoe.len=%d\n",
mbed714	0:d616ece2d859	621	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
mbed714	0:d616ece2d859	622	pb->len, plen));
mbed714	0:d616ece2d859	623
mbed714	0:d616ece2d859	624	if (pb->len < plen) {
mbed714	0:d616ece2d859	625	goto drop;
mbed714	0:d616ece2d859	626	}
mbed714	0:d616ece2d859	627
mbed714	0:d616ece2d859	628	pppInProcOverEthernet(sc->sc_pd, pb);
mbed714	0:d616ece2d859	629
mbed714	0:d616ece2d859	630	return;
mbed714	0:d616ece2d859	631
mbed714	0:d616ece2d859	632	drop:
mbed714	0:d616ece2d859	633	pbuf_free(pb);
mbed714	0:d616ece2d859	634	}
mbed714	0:d616ece2d859	635
mbed714	0:d616ece2d859	636	static err_t
mbed714	0:d616ece2d859	637	pppoe_output(struct pppoe_softc sc, struct pbuf pb)
mbed714	0:d616ece2d859	638	{
mbed714	0:d616ece2d859	639	struct eth_hdr *ethhdr;
mbed714	0:d616ece2d859	640	u16_t etype;
mbed714	0:d616ece2d859	641	err_t res;
mbed714	0:d616ece2d859	642
mbed714	0:d616ece2d859	643	if (!sc->sc_ethif) {
mbed714	0:d616ece2d859	644	pbuf_free(pb);
mbed714	0:d616ece2d859	645	return ERR_IF;
mbed714	0:d616ece2d859	646	}
mbed714	0:d616ece2d859	647
mbed714	0:d616ece2d859	648	ethhdr = (struct eth_hdr *)pb->payload;
mbed714	0:d616ece2d859	649	etype = sc->sc_state == PPPOE_STATE_SESSION ? ETHTYPE_PPPOE : ETHTYPE_PPPOEDISC;
mbed714	0:d616ece2d859	650	ethhdr->type = htons(etype);
mbed714	0:d616ece2d859	651	MEMCPY(ethhdr->dest.addr, sc->sc_dest.addr, sizeof(ethhdr->dest.addr));
mbed714	0:d616ece2d859	652	MEMCPY(ethhdr->src.addr, ((struct eth_addr *)sc->sc_ethif->hwaddr)->addr, sizeof(ethhdr->src.addr));
mbed714	0:d616ece2d859	653
mbed714	0:d616ece2d859	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",
mbed714	0:d616ece2d859	655	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, etype,
mbed714	0:d616ece2d859	656	sc->sc_state, sc->sc_session,
mbed714	0:d616ece2d859	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],
mbed714	0:d616ece2d859	658	pb->tot_len));
mbed714	0:d616ece2d859	659
mbed714	0:d616ece2d859	660	res = sc->sc_ethif->linkoutput(sc->sc_ethif, pb);
mbed714	0:d616ece2d859	661
mbed714	0:d616ece2d859	662	pbuf_free(pb);
mbed714	0:d616ece2d859	663
mbed714	0:d616ece2d859	664	return res;
mbed714	0:d616ece2d859	665	}
mbed714	0:d616ece2d859	666
mbed714	0:d616ece2d859	667	static err_t
mbed714	0:d616ece2d859	668	pppoe_send_padi(struct pppoe_softc *sc)
mbed714	0:d616ece2d859	669	{
mbed714	0:d616ece2d859	670	struct pbuf *pb;
mbed714	0:d616ece2d859	671	u8_t *p;
mbed714	0:d616ece2d859	672	int len;
mbed714	0:d616ece2d859	673	#ifdef PPPOE_TODO
mbed714	0:d616ece2d859	674	int l1 = 0, l2 = 0; /* XXX: gcc */
mbed714	0:d616ece2d859	675	#endif /* PPPOE_TODO */
mbed714	0:d616ece2d859	676
mbed714	0:d616ece2d859	677	if (sc->sc_state >PPPOE_STATE_PADI_SENT) {
mbed714	0:d616ece2d859	678	PPPDEBUG(LOG_ERR, ("ERROR: pppoe_send_padi in state %d", sc->sc_state));
mbed714	0:d616ece2d859	679	}
mbed714	0:d616ece2d859	680
mbed714	0:d616ece2d859	681	/* calculate length of frame (excluding ethernet header + pppoe header) */
mbed714	0:d616ece2d859	682	len = 2 + 2 + 2 + 2 + sizeof sc; /* service name tag is required, host unique is send too */
mbed714	0:d616ece2d859	683	#ifdef PPPOE_TODO
mbed714	0:d616ece2d859	684	if (sc->sc_service_name != NULL) {
mbed714	0:d616ece2d859	685	l1 = (int)strlen(sc->sc_service_name);
mbed714	0:d616ece2d859	686	len += l1;
mbed714	0:d616ece2d859	687	}
mbed714	0:d616ece2d859	688	if (sc->sc_concentrator_name != NULL) {
mbed714	0:d616ece2d859	689	l2 = (int)strlen(sc->sc_concentrator_name);
mbed714	0:d616ece2d859	690	len += 2 + 2 + l2;
mbed714	0:d616ece2d859	691	}
mbed714	0:d616ece2d859	692	#endif /* PPPOE_TODO */
mbed714	0:d616ece2d859	693	LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
mbed714	0:d616ece2d859	694	sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
mbed714	0:d616ece2d859	695
mbed714	0:d616ece2d859	696	/* allocate a buffer */
mbed714	0:d616ece2d859	697	pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
mbed714	0:d616ece2d859	698	if (!pb) {
mbed714	0:d616ece2d859	699	return ERR_MEM;
mbed714	0:d616ece2d859	700	}
mbed714	0:d616ece2d859	701	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
mbed714	0:d616ece2d859	702
mbed714	0:d616ece2d859	703	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
mbed714	0:d616ece2d859	704	/* fill in pkt */
mbed714	0:d616ece2d859	705	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADI, 0, (u16_t)len);
mbed714	0:d616ece2d859	706	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
mbed714	0:d616ece2d859	707	#ifdef PPPOE_TODO
mbed714	0:d616ece2d859	708	if (sc->sc_service_name != NULL) {
mbed714	0:d616ece2d859	709	PPPOE_ADD_16(p, l1);
mbed714	0:d616ece2d859	710	MEMCPY(p, sc->sc_service_name, l1);
mbed714	0:d616ece2d859	711	p += l1;
mbed714	0:d616ece2d859	712	} else
mbed714	0:d616ece2d859	713	#endif /* PPPOE_TODO */
mbed714	0:d616ece2d859	714	{
mbed714	0:d616ece2d859	715	PPPOE_ADD_16(p, 0);
mbed714	0:d616ece2d859	716	}
mbed714	0:d616ece2d859	717	#ifdef PPPOE_TODO
mbed714	0:d616ece2d859	718	if (sc->sc_concentrator_name != NULL) {
mbed714	0:d616ece2d859	719	PPPOE_ADD_16(p, PPPOE_TAG_ACNAME);
mbed714	0:d616ece2d859	720	PPPOE_ADD_16(p, l2);
mbed714	0:d616ece2d859	721	MEMCPY(p, sc->sc_concentrator_name, l2);
mbed714	0:d616ece2d859	722	p += l2;
mbed714	0:d616ece2d859	723	}
mbed714	0:d616ece2d859	724	#endif /* PPPOE_TODO */
mbed714	0:d616ece2d859	725	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
mbed714	0:d616ece2d859	726	PPPOE_ADD_16(p, sizeof(sc));
mbed714	0:d616ece2d859	727	MEMCPY(p, &sc, sizeof sc);
mbed714	0:d616ece2d859	728
mbed714	0:d616ece2d859	729	/* send pkt */
mbed714	0:d616ece2d859	730	return pppoe_output(sc, pb);
mbed714	0:d616ece2d859	731	}
mbed714	0:d616ece2d859	732
mbed714	0:d616ece2d859	733	static void
mbed714	0:d616ece2d859	734	pppoe_timeout(void *arg)
mbed714	0:d616ece2d859	735	{
mbed714	0:d616ece2d859	736	int retry_wait, err;
mbed714	0:d616ece2d859	737	struct pppoe_softc sc = (struct pppoe_softc)arg;
mbed714	0:d616ece2d859	738
mbed714	0:d616ece2d859	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));
mbed714	0:d616ece2d859	740
mbed714	0:d616ece2d859	741	switch (sc->sc_state) {
mbed714	0:d616ece2d859	742	case PPPOE_STATE_PADI_SENT:
mbed714	0:d616ece2d859	743	/*
mbed714	0:d616ece2d859	744	* We have two basic ways of retrying:
mbed714	0:d616ece2d859	745	* - Quick retry mode: try a few times in short sequence
mbed714	0:d616ece2d859	746	* - Slow retry mode: we already had a connection successfully
mbed714	0:d616ece2d859	747	* established and will try infinitely (without user
mbed714	0:d616ece2d859	748	* intervention)
mbed714	0:d616ece2d859	749	* We only enter slow retry mode if IFF_LINK1 (aka autodial)
mbed714	0:d616ece2d859	750	* is not set.
mbed714	0:d616ece2d859	751	*/
mbed714	0:d616ece2d859	752
mbed714	0:d616ece2d859	753	/* initialize for quick retry mode */
mbed714	0:d616ece2d859	754	retry_wait = PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried);
mbed714	0:d616ece2d859	755
mbed714	0:d616ece2d859	756	sc->sc_padi_retried++;
mbed714	0:d616ece2d859	757	if (sc->sc_padi_retried >= PPPOE_DISC_MAXPADI) {
mbed714	0:d616ece2d859	758	#if 0
mbed714	0:d616ece2d859	759	if ((sc->sc_sppp.pp_if.if_flags & IFF_LINK1) == 0) {
mbed714	0:d616ece2d859	760	/* slow retry mode */
mbed714	0:d616ece2d859	761	retry_wait = PPPOE_SLOW_RETRY;
mbed714	0:d616ece2d859	762	} else
mbed714	0:d616ece2d859	763	#endif
mbed714	0:d616ece2d859	764	{
mbed714	0:d616ece2d859	765	pppoe_abort_connect(sc);
mbed714	0:d616ece2d859	766	return;
mbed714	0:d616ece2d859	767	}
mbed714	0:d616ece2d859	768	}
mbed714	0:d616ece2d859	769	if ((err = pppoe_send_padi(sc)) != 0) {
mbed714	0:d616ece2d859	770	sc->sc_padi_retried--;
mbed714	0:d616ece2d859	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));
mbed714	0:d616ece2d859	772	}
mbed714	0:d616ece2d859	773	sys_timeout(retry_wait, pppoe_timeout, sc);
mbed714	0:d616ece2d859	774	break;
mbed714	0:d616ece2d859	775
mbed714	0:d616ece2d859	776	case PPPOE_STATE_PADR_SENT:
mbed714	0:d616ece2d859	777	sc->sc_padr_retried++;
mbed714	0:d616ece2d859	778	if (sc->sc_padr_retried >= PPPOE_DISC_MAXPADR) {
mbed714	0:d616ece2d859	779	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
mbed714	0:d616ece2d859	780	sc->sc_state = PPPOE_STATE_PADI_SENT;
mbed714	0:d616ece2d859	781	sc->sc_padr_retried = 0;
mbed714	0:d616ece2d859	782	if ((err = pppoe_send_padi(sc)) != 0) {
mbed714	0:d616ece2d859	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));
mbed714	0:d616ece2d859	784	}
mbed714	0:d616ece2d859	785	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried), pppoe_timeout, sc);
mbed714	0:d616ece2d859	786	return;
mbed714	0:d616ece2d859	787	}
mbed714	0:d616ece2d859	788	if ((err = pppoe_send_padr(sc)) != 0) {
mbed714	0:d616ece2d859	789	sc->sc_padr_retried--;
mbed714	0:d616ece2d859	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));
mbed714	0:d616ece2d859	791	}
mbed714	0:d616ece2d859	792	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
mbed714	0:d616ece2d859	793	break;
mbed714	0:d616ece2d859	794	case PPPOE_STATE_CLOSING:
mbed714	0:d616ece2d859	795	pppoe_do_disconnect(sc);
mbed714	0:d616ece2d859	796	break;
mbed714	0:d616ece2d859	797	default:
mbed714	0:d616ece2d859	798	return; /* all done, work in peace */
mbed714	0:d616ece2d859	799	}
mbed714	0:d616ece2d859	800	}
mbed714	0:d616ece2d859	801
mbed714	0:d616ece2d859	802	/* Start a connection (i.e. initiate discovery phase) */
mbed714	0:d616ece2d859	803	int
mbed714	0:d616ece2d859	804	pppoe_connect(struct pppoe_softc *sc)
mbed714	0:d616ece2d859	805	{
mbed714	0:d616ece2d859	806	int err;
mbed714	0:d616ece2d859	807
mbed714	0:d616ece2d859	808	if (sc->sc_state != PPPOE_STATE_INITIAL) {
mbed714	0:d616ece2d859	809	return EBUSY;
mbed714	0:d616ece2d859	810	}
mbed714	0:d616ece2d859	811
mbed714	0:d616ece2d859	812	#ifdef PPPOE_SERVER
mbed714	0:d616ece2d859	813	/* wait PADI if IFF_PASSIVE */
mbed714	0:d616ece2d859	814	if ((sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
mbed714	0:d616ece2d859	815	return 0;
mbed714	0:d616ece2d859	816	}
mbed714	0:d616ece2d859	817	#endif
mbed714	0:d616ece2d859	818	/* save state, in case we fail to send PADI */
mbed714	0:d616ece2d859	819	sc->sc_state = PPPOE_STATE_PADI_SENT;
mbed714	0:d616ece2d859	820	sc->sc_padr_retried = 0;
mbed714	0:d616ece2d859	821	err = pppoe_send_padi(sc);
mbed714	0:d616ece2d859	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));
mbed714	0:d616ece2d859	823	sys_timeout(PPPOE_DISC_TIMEOUT, pppoe_timeout, sc);
mbed714	0:d616ece2d859	824	return err;
mbed714	0:d616ece2d859	825	}
mbed714	0:d616ece2d859	826
mbed714	0:d616ece2d859	827	/* disconnect */
mbed714	0:d616ece2d859	828	void
mbed714	0:d616ece2d859	829	pppoe_disconnect(struct pppoe_softc *sc)
mbed714	0:d616ece2d859	830	{
mbed714	0:d616ece2d859	831	if (sc->sc_state < PPPOE_STATE_SESSION) {
mbed714	0:d616ece2d859	832	return;
mbed714	0:d616ece2d859	833	}
mbed714	0:d616ece2d859	834	/*
mbed714	0:d616ece2d859	835	* Do not call pppoe_disconnect here, the upper layer state
mbed714	0:d616ece2d859	836	* machine gets confused by this. We must return from this
mbed714	0:d616ece2d859	837	* function and defer disconnecting to the timeout handler.
mbed714	0:d616ece2d859	838	*/
mbed714	0:d616ece2d859	839	sc->sc_state = PPPOE_STATE_CLOSING;
mbed714	0:d616ece2d859	840	sys_timeout(20, pppoe_timeout, sc);
mbed714	0:d616ece2d859	841	}
mbed714	0:d616ece2d859	842
mbed714	0:d616ece2d859	843	static int
mbed714	0:d616ece2d859	844	pppoe_do_disconnect(struct pppoe_softc *sc)
mbed714	0:d616ece2d859	845	{
mbed714	0:d616ece2d859	846	int err;
mbed714	0:d616ece2d859	847
mbed714	0:d616ece2d859	848	if (sc->sc_state < PPPOE_STATE_SESSION) {
mbed714	0:d616ece2d859	849	err = EBUSY;
mbed714	0:d616ece2d859	850	} else {
mbed714	0:d616ece2d859	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));
mbed714	0:d616ece2d859	852	err = pppoe_send_padt(sc->sc_ethif, sc->sc_session, (const u8_t *)&sc->sc_dest);
mbed714	0:d616ece2d859	853	}
mbed714	0:d616ece2d859	854
mbed714	0:d616ece2d859	855	/* cleanup softc */
mbed714	0:d616ece2d859	856	sc->sc_state = PPPOE_STATE_INITIAL;
mbed714	0:d616ece2d859	857	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
mbed714	0:d616ece2d859	858	sc->sc_ac_cookie_len = 0;
mbed714	0:d616ece2d859	859	#ifdef PPPOE_SERVER
mbed714	0:d616ece2d859	860	if (sc->sc_hunique) {
mbed714	0:d616ece2d859	861	mem_free(sc->sc_hunique);
mbed714	0:d616ece2d859	862	sc->sc_hunique = NULL;
mbed714	0:d616ece2d859	863	}
mbed714	0:d616ece2d859	864	sc->sc_hunique_len = 0;
mbed714	0:d616ece2d859	865	#endif
mbed714	0:d616ece2d859	866	sc->sc_session = 0;
mbed714	0:d616ece2d859	867
mbed714	0:d616ece2d859	868	sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
mbed714	0:d616ece2d859	869
mbed714	0:d616ece2d859	870	return err;
mbed714	0:d616ece2d859	871	}
mbed714	0:d616ece2d859	872
mbed714	0:d616ece2d859	873	/* Connection attempt aborted */
mbed714	0:d616ece2d859	874	static void
mbed714	0:d616ece2d859	875	pppoe_abort_connect(struct pppoe_softc *sc)
mbed714	0:d616ece2d859	876	{
mbed714	0:d616ece2d859	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);
mbed714	0:d616ece2d859	878	sc->sc_state = PPPOE_STATE_CLOSING;
mbed714	0:d616ece2d859	879
mbed714	0:d616ece2d859	880	sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
mbed714	0:d616ece2d859	881
mbed714	0:d616ece2d859	882	/* clear connection state */
mbed714	0:d616ece2d859	883	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
mbed714	0:d616ece2d859	884	sc->sc_state = PPPOE_STATE_INITIAL;
mbed714	0:d616ece2d859	885	}
mbed714	0:d616ece2d859	886
mbed714	0:d616ece2d859	887	/* Send a PADR packet */
mbed714	0:d616ece2d859	888	static err_t
mbed714	0:d616ece2d859	889	pppoe_send_padr(struct pppoe_softc *sc)
mbed714	0:d616ece2d859	890	{
mbed714	0:d616ece2d859	891	struct pbuf *pb;
mbed714	0:d616ece2d859	892	u8_t *p;
mbed714	0:d616ece2d859	893	size_t len;
mbed714	0:d616ece2d859	894	#ifdef PPPOE_TODO
mbed714	0:d616ece2d859	895	size_t l1 = 0; /* XXX: gcc */
mbed714	0:d616ece2d859	896	#endif /* PPPOE_TODO */
mbed714	0:d616ece2d859	897
mbed714	0:d616ece2d859	898	if (sc->sc_state != PPPOE_STATE_PADR_SENT) {
mbed714	0:d616ece2d859	899	return ERR_CONN;
mbed714	0:d616ece2d859	900	}
mbed714	0:d616ece2d859	901
mbed714	0:d616ece2d859	902	len = 2 + 2 + 2 + 2 + sizeof(sc); /* service name, host unique */
mbed714	0:d616ece2d859	903	#ifdef PPPOE_TODO
mbed714	0:d616ece2d859	904	if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
mbed714	0:d616ece2d859	905	l1 = strlen(sc->sc_service_name);
mbed714	0:d616ece2d859	906	len += l1;
mbed714	0:d616ece2d859	907	}
mbed714	0:d616ece2d859	908	#endif /* PPPOE_TODO */
mbed714	0:d616ece2d859	909	if (sc->sc_ac_cookie_len > 0) {
mbed714	0:d616ece2d859	910	len += 2 + 2 + sc->sc_ac_cookie_len; /* AC cookie */
mbed714	0:d616ece2d859	911	}
mbed714	0:d616ece2d859	912	LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
mbed714	0:d616ece2d859	913	sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
mbed714	0:d616ece2d859	914	pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
mbed714	0:d616ece2d859	915	if (!pb) {
mbed714	0:d616ece2d859	916	return ERR_MEM;
mbed714	0:d616ece2d859	917	}
mbed714	0:d616ece2d859	918	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
mbed714	0:d616ece2d859	919	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
mbed714	0:d616ece2d859	920	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADR, 0, len);
mbed714	0:d616ece2d859	921	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
mbed714	0:d616ece2d859	922	#ifdef PPPOE_TODO
mbed714	0:d616ece2d859	923	if (sc->sc_service_name != NULL) {
mbed714	0:d616ece2d859	924	PPPOE_ADD_16(p, l1);
mbed714	0:d616ece2d859	925	MEMCPY(p, sc->sc_service_name, l1);
mbed714	0:d616ece2d859	926	p += l1;
mbed714	0:d616ece2d859	927	} else
mbed714	0:d616ece2d859	928	#endif /* PPPOE_TODO */
mbed714	0:d616ece2d859	929	{
mbed714	0:d616ece2d859	930	PPPOE_ADD_16(p, 0);
mbed714	0:d616ece2d859	931	}
mbed714	0:d616ece2d859	932	if (sc->sc_ac_cookie_len > 0) {
mbed714	0:d616ece2d859	933	PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
mbed714	0:d616ece2d859	934	PPPOE_ADD_16(p, sc->sc_ac_cookie_len);
mbed714	0:d616ece2d859	935	MEMCPY(p, sc->sc_ac_cookie, sc->sc_ac_cookie_len);
mbed714	0:d616ece2d859	936	p += sc->sc_ac_cookie_len;
mbed714	0:d616ece2d859	937	}
mbed714	0:d616ece2d859	938	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
mbed714	0:d616ece2d859	939	PPPOE_ADD_16(p, sizeof(sc));
mbed714	0:d616ece2d859	940	MEMCPY(p, &sc, sizeof sc);
mbed714	0:d616ece2d859	941
mbed714	0:d616ece2d859	942	return pppoe_output(sc, pb);
mbed714	0:d616ece2d859	943	}
mbed714	0:d616ece2d859	944
mbed714	0:d616ece2d859	945	/* send a PADT packet */
mbed714	0:d616ece2d859	946	static err_t
mbed714	0:d616ece2d859	947	pppoe_send_padt(struct netif outgoing_if, u_int session, const u8_t dest)
mbed714	0:d616ece2d859	948	{
mbed714	0:d616ece2d859	949	struct pbuf *pb;
mbed714	0:d616ece2d859	950	struct eth_hdr *ethhdr;
mbed714	0:d616ece2d859	951	err_t res;
mbed714	0:d616ece2d859	952	u8_t *p;
mbed714	0:d616ece2d859	953
mbed714	0:d616ece2d859	954	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN, PBUF_RAM);
mbed714	0:d616ece2d859	955	if (!pb) {
mbed714	0:d616ece2d859	956	return ERR_MEM;
mbed714	0:d616ece2d859	957	}
mbed714	0:d616ece2d859	958	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
mbed714	0:d616ece2d859	959
mbed714	0:d616ece2d859	960	ethhdr = (struct eth_hdr *)pb->payload;
mbed714	0:d616ece2d859	961	ethhdr->type = PP_HTONS(ETHTYPE_PPPOEDISC);
mbed714	0:d616ece2d859	962	MEMCPY(ethhdr->dest.addr, dest, sizeof(ethhdr->dest.addr));
mbed714	0:d616ece2d859	963	MEMCPY(ethhdr->src.addr, ((struct eth_addr *)outgoing_if->hwaddr)->addr, sizeof(ethhdr->src.addr));
mbed714	0:d616ece2d859	964
mbed714	0:d616ece2d859	965	p = (u8_t*)(ethhdr + 1);
mbed714	0:d616ece2d859	966	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADT, session, 0);
mbed714	0:d616ece2d859	967
mbed714	0:d616ece2d859	968	res = outgoing_if->linkoutput(outgoing_if, pb);
mbed714	0:d616ece2d859	969
mbed714	0:d616ece2d859	970	pbuf_free(pb);
mbed714	0:d616ece2d859	971
mbed714	0:d616ece2d859	972	return res;
mbed714	0:d616ece2d859	973	}
mbed714	0:d616ece2d859	974
mbed714	0:d616ece2d859	975	#ifdef PPPOE_SERVER
mbed714	0:d616ece2d859	976	static err_t
mbed714	0:d616ece2d859	977	pppoe_send_pado(struct pppoe_softc *sc)
mbed714	0:d616ece2d859	978	{
mbed714	0:d616ece2d859	979	struct pbuf *pb;
mbed714	0:d616ece2d859	980	u8_t *p;
mbed714	0:d616ece2d859	981	size_t len;
mbed714	0:d616ece2d859	982
mbed714	0:d616ece2d859	983	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
mbed714	0:d616ece2d859	984	return ERR_CONN;
mbed714	0:d616ece2d859	985	}
mbed714	0:d616ece2d859	986
mbed714	0:d616ece2d859	987	/* calc length */
mbed714	0:d616ece2d859	988	len = 0;
mbed714	0:d616ece2d859	989	/* include ac_cookie */
mbed714	0:d616ece2d859	990	len += 2 + 2 + sizeof(sc);
mbed714	0:d616ece2d859	991	/* include hunique */
mbed714	0:d616ece2d859	992	len += 2 + 2 + sc->sc_hunique_len;
mbed714	0:d616ece2d859	993	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
mbed714	0:d616ece2d859	994	if (!pb) {
mbed714	0:d616ece2d859	995	return ERR_MEM;
mbed714	0:d616ece2d859	996	}
mbed714	0:d616ece2d859	997	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
mbed714	0:d616ece2d859	998	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
mbed714	0:d616ece2d859	999	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADO, 0, len);
mbed714	0:d616ece2d859	1000	PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
mbed714	0:d616ece2d859	1001	PPPOE_ADD_16(p, sizeof(sc));
mbed714	0:d616ece2d859	1002	MEMCPY(p, &sc, sizeof(sc));
mbed714	0:d616ece2d859	1003	p += sizeof(sc);
mbed714	0:d616ece2d859	1004	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
mbed714	0:d616ece2d859	1005	PPPOE_ADD_16(p, sc->sc_hunique_len);
mbed714	0:d616ece2d859	1006	MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
mbed714	0:d616ece2d859	1007	return pppoe_output(sc, pb);
mbed714	0:d616ece2d859	1008	}
mbed714	0:d616ece2d859	1009
mbed714	0:d616ece2d859	1010	static err_t
mbed714	0:d616ece2d859	1011	pppoe_send_pads(struct pppoe_softc *sc)
mbed714	0:d616ece2d859	1012	{
mbed714	0:d616ece2d859	1013	struct pbuf *pb;
mbed714	0:d616ece2d859	1014	u8_t *p;
mbed714	0:d616ece2d859	1015	size_t len, l1 = 0; /* XXX: gcc */
mbed714	0:d616ece2d859	1016
mbed714	0:d616ece2d859	1017	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
mbed714	0:d616ece2d859	1018	return ERR_CONN;
mbed714	0:d616ece2d859	1019	}
mbed714	0:d616ece2d859	1020
mbed714	0:d616ece2d859	1021	sc->sc_session = mono_time.tv_sec % 0xff + 1;
mbed714	0:d616ece2d859	1022	/* calc length */
mbed714	0:d616ece2d859	1023	len = 0;
mbed714	0:d616ece2d859	1024	/* include hunique */
mbed714	0:d616ece2d859	1025	len += 2 + 2 + 2 + 2 + sc->sc_hunique_len; /* service name, host unique*/
mbed714	0:d616ece2d859	1026	if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
mbed714	0:d616ece2d859	1027	l1 = strlen(sc->sc_service_name);
mbed714	0:d616ece2d859	1028	len += l1;
mbed714	0:d616ece2d859	1029	}
mbed714	0:d616ece2d859	1030	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
mbed714	0:d616ece2d859	1031	if (!pb) {
mbed714	0:d616ece2d859	1032	return ERR_MEM;
mbed714	0:d616ece2d859	1033	}
mbed714	0:d616ece2d859	1034	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
mbed714	0:d616ece2d859	1035	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
mbed714	0:d616ece2d859	1036	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADS, sc->sc_session, len);
mbed714	0:d616ece2d859	1037	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
mbed714	0:d616ece2d859	1038	if (sc->sc_service_name != NULL) {
mbed714	0:d616ece2d859	1039	PPPOE_ADD_16(p, l1);
mbed714	0:d616ece2d859	1040	MEMCPY(p, sc->sc_service_name, l1);
mbed714	0:d616ece2d859	1041	p += l1;
mbed714	0:d616ece2d859	1042	} else {
mbed714	0:d616ece2d859	1043	PPPOE_ADD_16(p, 0);
mbed714	0:d616ece2d859	1044	}
mbed714	0:d616ece2d859	1045	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
mbed714	0:d616ece2d859	1046	PPPOE_ADD_16(p, sc->sc_hunique_len);
mbed714	0:d616ece2d859	1047	MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
mbed714	0:d616ece2d859	1048	return pppoe_output(sc, pb);
mbed714	0:d616ece2d859	1049	}
mbed714	0:d616ece2d859	1050	#endif
mbed714	0:d616ece2d859	1051
mbed714	0:d616ece2d859	1052	err_t
mbed714	0:d616ece2d859	1053	pppoe_xmit(struct pppoe_softc sc, struct pbuf pb)
mbed714	0:d616ece2d859	1054	{
mbed714	0:d616ece2d859	1055	u8_t *p;
mbed714	0:d616ece2d859	1056	size_t len;
mbed714	0:d616ece2d859	1057
mbed714	0:d616ece2d859	1058	/* are we ready to process data yet? */
mbed714	0:d616ece2d859	1059	if (sc->sc_state < PPPOE_STATE_SESSION) {
mbed714	0:d616ece2d859	1060	/sppp_flush(&sc->sc_sppp.pp_if);/
mbed714	0:d616ece2d859	1061	pbuf_free(pb);
mbed714	0:d616ece2d859	1062	return ERR_CONN;
mbed714	0:d616ece2d859	1063	}
mbed714	0:d616ece2d859	1064
mbed714	0:d616ece2d859	1065	len = pb->tot_len;
mbed714	0:d616ece2d859	1066
mbed714	0:d616ece2d859	1067	/* make room for Ethernet header - should not fail */
mbed714	0:d616ece2d859	1068	if (pbuf_header(pb, sizeof(struct eth_hdr) + PPPOE_HEADERLEN) != 0) {
mbed714	0:d616ece2d859	1069	/* bail out */
mbed714	0:d616ece2d859	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));
mbed714	0:d616ece2d859	1071	LINK_STATS_INC(link.lenerr);
mbed714	0:d616ece2d859	1072	pbuf_free(pb);
mbed714	0:d616ece2d859	1073	return ERR_BUF;
mbed714	0:d616ece2d859	1074	}
mbed714	0:d616ece2d859	1075
mbed714	0:d616ece2d859	1076	p = (u8_t*)pb->payload + sizeof(struct eth_hdr);
mbed714	0:d616ece2d859	1077	PPPOE_ADD_HEADER(p, 0, sc->sc_session, len);
mbed714	0:d616ece2d859	1078
mbed714	0:d616ece2d859	1079	return pppoe_output(sc, pb);
mbed714	0:d616ece2d859	1080	}
mbed714	0:d616ece2d859	1081
mbed714	0:d616ece2d859	1082	#if 0 /def PFIL_HOOKS/
mbed714	0:d616ece2d859	1083	static int
mbed714	0:d616ece2d859	1084	pppoe_ifattach_hook(void arg, struct pbuf mp, struct netif ifp, int dir)
mbed714	0:d616ece2d859	1085	{
mbed714	0:d616ece2d859	1086	struct pppoe_softc *sc;
mbed714	0:d616ece2d859	1087	int s;
mbed714	0:d616ece2d859	1088
mbed714	0:d616ece2d859	1089	if (mp != (struct pbuf **)PFIL_IFNET_DETACH) {
mbed714	0:d616ece2d859	1090	return 0;
mbed714	0:d616ece2d859	1091	}
mbed714	0:d616ece2d859	1092
mbed714	0:d616ece2d859	1093	LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
mbed714	0:d616ece2d859	1094	if (sc->sc_ethif != ifp) {
mbed714	0:d616ece2d859	1095	continue;
mbed714	0:d616ece2d859	1096	}
mbed714	0:d616ece2d859	1097	if (sc->sc_sppp.pp_if.if_flags & IFF_UP) {
mbed714	0:d616ece2d859	1098	sc->sc_sppp.pp_if.if_flags &= ~(IFF_UP\|IFF_RUNNING);
mbed714	0:d616ece2d859	1099	printf("%c%c%"U16_F": ethernet interface detached, going down\n",
mbed714	0:d616ece2d859	1100	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
mbed714	0:d616ece2d859	1101	}
mbed714	0:d616ece2d859	1102	sc->sc_ethif = NULL;
mbed714	0:d616ece2d859	1103	pppoe_clear_softc(sc, "ethernet interface detached");
mbed714	0:d616ece2d859	1104	}
mbed714	0:d616ece2d859	1105
mbed714	0:d616ece2d859	1106	return 0;
mbed714	0:d616ece2d859	1107	}
mbed714	0:d616ece2d859	1108	#endif
mbed714	0:d616ece2d859	1109
mbed714	0:d616ece2d859	1110	static void
mbed714	0:d616ece2d859	1111	pppoe_clear_softc(struct pppoe_softc sc, const char message)
mbed714	0:d616ece2d859	1112	{
mbed714	0:d616ece2d859	1113	LWIP_UNUSED_ARG(message);
mbed714	0:d616ece2d859	1114
mbed714	0:d616ece2d859	1115	/* stop timer */
mbed714	0:d616ece2d859	1116	sys_untimeout(pppoe_timeout, sc);
mbed714	0:d616ece2d859	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));
mbed714	0:d616ece2d859	1118
mbed714	0:d616ece2d859	1119	/* fix our state */
mbed714	0:d616ece2d859	1120	sc->sc_state = PPPOE_STATE_INITIAL;
mbed714	0:d616ece2d859	1121
mbed714	0:d616ece2d859	1122	/* notify upper layers */
mbed714	0:d616ece2d859	1123	sc->sc_linkStatusCB(sc->sc_pd, 0);
mbed714	0:d616ece2d859	1124
mbed714	0:d616ece2d859	1125	/* clean up softc */
mbed714	0:d616ece2d859	1126	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
mbed714	0:d616ece2d859	1127	sc->sc_ac_cookie_len = 0;
mbed714	0:d616ece2d859	1128	sc->sc_session = 0;
mbed714	0:d616ece2d859	1129	}
mbed714	0:d616ece2d859	1130
mbed714	0:d616ece2d859	1131	#endif /* PPPOE_SUPPORT */
mbed714	0:d616ece2d859	1132

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Type:	Library
Created:	18 Sep 2010
Imports:	1
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	1

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lwip/netif/ppp/ppp_oe.c@0:d616ece2d859, 2010-09-18 (annotated)

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