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NetStack/lwip/netif/ppp/ppp_oe.c@0:1a61c61d0845, 2012-04-03 (annotated)

Committer:: dcoban
Date:: Tue Apr 03 18:43:13 2012 +0000
Revision:: 0:1a61c61d0845

Who changed what in which revision?

User	Revision	Line number	New contents of line
dcoban	0:1a61c61d0845	1	/*****************************************************************************
dcoban	0:1a61c61d0845	2	* ppp_oe.c - PPP Over Ethernet implementation for lwIP.
dcoban	0:1a61c61d0845	3	*
dcoban	0:1a61c61d0845	4	* Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc.
dcoban	0:1a61c61d0845	5	*
dcoban	0:1a61c61d0845	6	* The authors hereby grant permission to use, copy, modify, distribute,
dcoban	0:1a61c61d0845	7	* and license this software and its documentation for any purpose, provided
dcoban	0:1a61c61d0845	8	* that existing copyright notices are retained in all copies and that this
dcoban	0:1a61c61d0845	9	* notice and the following disclaimer are included verbatim in any
dcoban	0:1a61c61d0845	10	* distributions. No written agreement, license, or royalty fee is required
dcoban	0:1a61c61d0845	11	* for any of the authorized uses.
dcoban	0:1a61c61d0845	12	*
dcoban	0:1a61c61d0845	13	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
dcoban	0:1a61c61d0845	14	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
dcoban	0:1a61c61d0845	15	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
dcoban	0:1a61c61d0845	16	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
dcoban	0:1a61c61d0845	17	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
dcoban	0:1a61c61d0845	18	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
dcoban	0:1a61c61d0845	19	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
dcoban	0:1a61c61d0845	20	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
dcoban	0:1a61c61d0845	21	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
dcoban	0:1a61c61d0845	22	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
dcoban	0:1a61c61d0845	23	*
dcoban	0:1a61c61d0845	24	******************************************************************************
dcoban	0:1a61c61d0845	25	* REVISION HISTORY
dcoban	0:1a61c61d0845	26	*
dcoban	0:1a61c61d0845	27	* 06-01-01 Marc Boucher <marc@mbsi.ca>
dcoban	0:1a61c61d0845	28	* Ported to lwIP.
dcoban	0:1a61c61d0845	29	*****************************************************************************/
dcoban	0:1a61c61d0845	30
dcoban	0:1a61c61d0845	31
dcoban	0:1a61c61d0845	32
dcoban	0:1a61c61d0845	33	/* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */
dcoban	0:1a61c61d0845	34
dcoban	0:1a61c61d0845	35	/*-
dcoban	0:1a61c61d0845	36	* Copyright (c) 2002 The NetBSD Foundation, Inc.
dcoban	0:1a61c61d0845	37	* All rights reserved.
dcoban	0:1a61c61d0845	38	*
dcoban	0:1a61c61d0845	39	* This code is derived from software contributed to The NetBSD Foundation
dcoban	0:1a61c61d0845	40	* by Martin Husemann <martin@NetBSD.org>.
dcoban	0:1a61c61d0845	41	*
dcoban	0:1a61c61d0845	42	* Redistribution and use in source and binary forms, with or without
dcoban	0:1a61c61d0845	43	* modification, are permitted provided that the following conditions
dcoban	0:1a61c61d0845	44	* are met:
dcoban	0:1a61c61d0845	45	* 1. Redistributions of source code must retain the above copyright
dcoban	0:1a61c61d0845	46	* notice, this list of conditions and the following disclaimer.
dcoban	0:1a61c61d0845	47	* 2. Redistributions in binary form must reproduce the above copyright
dcoban	0:1a61c61d0845	48	* notice, this list of conditions and the following disclaimer in the
dcoban	0:1a61c61d0845	49	* documentation and/or other materials provided with the distribution.
dcoban	0:1a61c61d0845	50	* 3. All advertising materials mentioning features or use of this software
dcoban	0:1a61c61d0845	51	* must display the following acknowledgement:
dcoban	0:1a61c61d0845	52	* This product includes software developed by the NetBSD
dcoban	0:1a61c61d0845	53	* Foundation, Inc. and its contributors.
dcoban	0:1a61c61d0845	54	* 4. Neither the name of The NetBSD Foundation nor the names of its
dcoban	0:1a61c61d0845	55	* contributors may be used to endorse or promote products derived
dcoban	0:1a61c61d0845	56	* from this software without specific prior written permission.
dcoban	0:1a61c61d0845	57	*
dcoban	0:1a61c61d0845	58	* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
dcoban	0:1a61c61d0845	59	* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
dcoban	0:1a61c61d0845	60	* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
dcoban	0:1a61c61d0845	61	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
dcoban	0:1a61c61d0845	62	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
dcoban	0:1a61c61d0845	63	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
dcoban	0:1a61c61d0845	64	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
dcoban	0:1a61c61d0845	65	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
dcoban	0:1a61c61d0845	66	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
dcoban	0:1a61c61d0845	67	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
dcoban	0:1a61c61d0845	68	* POSSIBILITY OF SUCH DAMAGE.
dcoban	0:1a61c61d0845	69	*/
dcoban	0:1a61c61d0845	70
dcoban	0:1a61c61d0845	71	#include "lwip/opt.h"
dcoban	0:1a61c61d0845	72
dcoban	0:1a61c61d0845	73	#if PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */
dcoban	0:1a61c61d0845	74
dcoban	0:1a61c61d0845	75	#include "netif/ppp_oe.h"
dcoban	0:1a61c61d0845	76
dcoban	0:1a61c61d0845	77	#include "ppp.h"
dcoban	0:1a61c61d0845	78	#include "pppdebug.h"
dcoban	0:1a61c61d0845	79
dcoban	0:1a61c61d0845	80	#include "lwip/timers.h"
dcoban	0:1a61c61d0845	81	#include "lwip/memp.h"
dcoban	0:1a61c61d0845	82
dcoban	0:1a61c61d0845	83	#include <string.h>
dcoban	0:1a61c61d0845	84	#include <stdio.h>
dcoban	0:1a61c61d0845	85
dcoban	0:1a61c61d0845	86
dcoban	0:1a61c61d0845	87	/* Add a 16 bit unsigned value to a buffer pointed to by PTR */
dcoban	0:1a61c61d0845	88	#define PPPOE_ADD_16(PTR, VAL) \
dcoban	0:1a61c61d0845	89	*(PTR)++ = (u8_t)((VAL) / 256); \
dcoban	0:1a61c61d0845	90	*(PTR)++ = (u8_t)((VAL) % 256)
dcoban	0:1a61c61d0845	91
dcoban	0:1a61c61d0845	92	/* Add a complete PPPoE header to the buffer pointed to by PTR */
dcoban	0:1a61c61d0845	93	#define PPPOE_ADD_HEADER(PTR, CODE, SESS, LEN) \
dcoban	0:1a61c61d0845	94	*(PTR)++ = PPPOE_VERTYPE; \
dcoban	0:1a61c61d0845	95	*(PTR)++ = (CODE); \
dcoban	0:1a61c61d0845	96	PPPOE_ADD_16(PTR, SESS); \
dcoban	0:1a61c61d0845	97	PPPOE_ADD_16(PTR, LEN)
dcoban	0:1a61c61d0845	98
dcoban	0:1a61c61d0845	99	#define PPPOE_DISC_TIMEOUT (51000) / base for quick timeout calculation */
dcoban	0:1a61c61d0845	100	#define PPPOE_SLOW_RETRY (601000) / persistent retry interval */
dcoban	0:1a61c61d0845	101	#define PPPOE_DISC_MAXPADI 4 /* retry PADI four times (quickly) */
dcoban	0:1a61c61d0845	102	#define PPPOE_DISC_MAXPADR 2 /* retry PADR twice */
dcoban	0:1a61c61d0845	103
dcoban	0:1a61c61d0845	104	#ifdef PPPOE_SERVER
dcoban	0:1a61c61d0845	105	#error "PPPOE_SERVER is not yet supported under lwIP!"
dcoban	0:1a61c61d0845	106	/* from if_spppsubr.c */
dcoban	0:1a61c61d0845	107	#define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
dcoban	0:1a61c61d0845	108	#endif
dcoban	0:1a61c61d0845	109
dcoban	0:1a61c61d0845	110	#ifndef PPPOE_ERRORSTRING_LEN
dcoban	0:1a61c61d0845	111	#define PPPOE_ERRORSTRING_LEN 64
dcoban	0:1a61c61d0845	112	#endif
dcoban	0:1a61c61d0845	113	static char pppoe_error_tmp[PPPOE_ERRORSTRING_LEN];
dcoban	0:1a61c61d0845	114
dcoban	0:1a61c61d0845	115
dcoban	0:1a61c61d0845	116	/* input routines */
dcoban	0:1a61c61d0845	117	static void pppoe_dispatch_disc_pkt(struct netif , struct pbuf );
dcoban	0:1a61c61d0845	118
dcoban	0:1a61c61d0845	119	/* management routines */
dcoban	0:1a61c61d0845	120	static int pppoe_do_disconnect(struct pppoe_softc *);
dcoban	0:1a61c61d0845	121	static void pppoe_abort_connect(struct pppoe_softc *);
dcoban	0:1a61c61d0845	122	static void pppoe_clear_softc(struct pppoe_softc , const char );
dcoban	0:1a61c61d0845	123
dcoban	0:1a61c61d0845	124	/* internal timeout handling */
dcoban	0:1a61c61d0845	125	static void pppoe_timeout(void *);
dcoban	0:1a61c61d0845	126
dcoban	0:1a61c61d0845	127	/* sending actual protocol controll packets */
dcoban	0:1a61c61d0845	128	static err_t pppoe_send_padi(struct pppoe_softc *);
dcoban	0:1a61c61d0845	129	static err_t pppoe_send_padr(struct pppoe_softc *);
dcoban	0:1a61c61d0845	130	#ifdef PPPOE_SERVER
dcoban	0:1a61c61d0845	131	static err_t pppoe_send_pado(struct pppoe_softc *);
dcoban	0:1a61c61d0845	132	static err_t pppoe_send_pads(struct pppoe_softc *);
dcoban	0:1a61c61d0845	133	#endif
dcoban	0:1a61c61d0845	134	static err_t pppoe_send_padt(struct netif , u_int, const u8_t );
dcoban	0:1a61c61d0845	135
dcoban	0:1a61c61d0845	136	/* internal helper functions */
dcoban	0:1a61c61d0845	137	static struct pppoe_softc * pppoe_find_softc_by_session(u_int, struct netif *);
dcoban	0:1a61c61d0845	138	static struct pppoe_softc * pppoe_find_softc_by_hunique(u8_t , size_t, struct netif );
dcoban	0:1a61c61d0845	139
dcoban	0:1a61c61d0845	140	/** linked list of created pppoe interfaces */
dcoban	0:1a61c61d0845	141	static struct pppoe_softc *pppoe_softc_list;
dcoban	0:1a61c61d0845	142
dcoban	0:1a61c61d0845	143	err_t
dcoban	0:1a61c61d0845	144	pppoe_create(struct netif ethif, int pd, void (linkStatusCB)(int pd, int up), struct pppoe_softc **scptr)
dcoban	0:1a61c61d0845	145	{
dcoban	0:1a61c61d0845	146	struct pppoe_softc *sc;
dcoban	0:1a61c61d0845	147
dcoban	0:1a61c61d0845	148	sc = (struct pppoe_softc *)memp_malloc(MEMP_PPPOE_IF);
dcoban	0:1a61c61d0845	149	if (sc == NULL) {
dcoban	0:1a61c61d0845	150	*scptr = NULL;
dcoban	0:1a61c61d0845	151	return ERR_MEM;
dcoban	0:1a61c61d0845	152	}
dcoban	0:1a61c61d0845	153	memset(sc, 0, sizeof(struct pppoe_softc));
dcoban	0:1a61c61d0845	154
dcoban	0:1a61c61d0845	155	/* changed to real address later */
dcoban	0:1a61c61d0845	156	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
dcoban	0:1a61c61d0845	157
dcoban	0:1a61c61d0845	158	sc->sc_pd = pd;
dcoban	0:1a61c61d0845	159	sc->sc_linkStatusCB = linkStatusCB;
dcoban	0:1a61c61d0845	160	sc->sc_ethif = ethif;
dcoban	0:1a61c61d0845	161
dcoban	0:1a61c61d0845	162	/* put the new interface at the head of the list */
dcoban	0:1a61c61d0845	163	sc->next = pppoe_softc_list;
dcoban	0:1a61c61d0845	164	pppoe_softc_list = sc;
dcoban	0:1a61c61d0845	165
dcoban	0:1a61c61d0845	166	*scptr = sc;
dcoban	0:1a61c61d0845	167
dcoban	0:1a61c61d0845	168	return ERR_OK;
dcoban	0:1a61c61d0845	169	}
dcoban	0:1a61c61d0845	170
dcoban	0:1a61c61d0845	171	err_t
dcoban	0:1a61c61d0845	172	pppoe_destroy(struct netif *ifp)
dcoban	0:1a61c61d0845	173	{
dcoban	0:1a61c61d0845	174	struct pppoe_softc sc, prev = NULL;
dcoban	0:1a61c61d0845	175
dcoban	0:1a61c61d0845	176	for (sc = pppoe_softc_list; sc != NULL; prev = sc, sc = sc->next) {
dcoban	0:1a61c61d0845	177	if (sc->sc_ethif == ifp) {
dcoban	0:1a61c61d0845	178	break;
dcoban	0:1a61c61d0845	179	}
dcoban	0:1a61c61d0845	180	}
dcoban	0:1a61c61d0845	181
dcoban	0:1a61c61d0845	182	if(!(sc && (sc->sc_ethif == ifp))) {
dcoban	0:1a61c61d0845	183	return ERR_IF;
dcoban	0:1a61c61d0845	184	}
dcoban	0:1a61c61d0845	185
dcoban	0:1a61c61d0845	186	sys_untimeout(pppoe_timeout, sc);
dcoban	0:1a61c61d0845	187	if (prev == NULL) {
dcoban	0:1a61c61d0845	188	/* remove sc from the head of the list */
dcoban	0:1a61c61d0845	189	pppoe_softc_list = sc->next;
dcoban	0:1a61c61d0845	190	} else {
dcoban	0:1a61c61d0845	191	/* remove sc from the list */
dcoban	0:1a61c61d0845	192	prev->next = sc->next;
dcoban	0:1a61c61d0845	193	}
dcoban	0:1a61c61d0845	194
dcoban	0:1a61c61d0845	195	#ifdef PPPOE_TODO
dcoban	0:1a61c61d0845	196	if (sc->sc_concentrator_name) {
dcoban	0:1a61c61d0845	197	mem_free(sc->sc_concentrator_name);
dcoban	0:1a61c61d0845	198	}
dcoban	0:1a61c61d0845	199	if (sc->sc_service_name) {
dcoban	0:1a61c61d0845	200	mem_free(sc->sc_service_name);
dcoban	0:1a61c61d0845	201	}
dcoban	0:1a61c61d0845	202	#endif /* PPPOE_TODO */
dcoban	0:1a61c61d0845	203	memp_free(MEMP_PPPOE_IF, sc);
dcoban	0:1a61c61d0845	204
dcoban	0:1a61c61d0845	205	return ERR_OK;
dcoban	0:1a61c61d0845	206	}
dcoban	0:1a61c61d0845	207
dcoban	0:1a61c61d0845	208	/*
dcoban	0:1a61c61d0845	209	* Find the interface handling the specified session.
dcoban	0:1a61c61d0845	210	* Note: O(number of sessions open), this is a client-side only, mean
dcoban	0:1a61c61d0845	211	* and lean implementation, so number of open sessions typically should
dcoban	0:1a61c61d0845	212	* be 1.
dcoban	0:1a61c61d0845	213	*/
dcoban	0:1a61c61d0845	214	static struct pppoe_softc *
dcoban	0:1a61c61d0845	215	pppoe_find_softc_by_session(u_int session, struct netif *rcvif)
dcoban	0:1a61c61d0845	216	{
dcoban	0:1a61c61d0845	217	struct pppoe_softc *sc;
dcoban	0:1a61c61d0845	218
dcoban	0:1a61c61d0845	219	if (session == 0) {
dcoban	0:1a61c61d0845	220	return NULL;
dcoban	0:1a61c61d0845	221	}
dcoban	0:1a61c61d0845	222
dcoban	0:1a61c61d0845	223	for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
dcoban	0:1a61c61d0845	224	if (sc->sc_state == PPPOE_STATE_SESSION
dcoban	0:1a61c61d0845	225	&& sc->sc_session == session) {
dcoban	0:1a61c61d0845	226	if (sc->sc_ethif == rcvif) {
dcoban	0:1a61c61d0845	227	return sc;
dcoban	0:1a61c61d0845	228	} else {
dcoban	0:1a61c61d0845	229	return NULL;
dcoban	0:1a61c61d0845	230	}
dcoban	0:1a61c61d0845	231	}
dcoban	0:1a61c61d0845	232	}
dcoban	0:1a61c61d0845	233	return NULL;
dcoban	0:1a61c61d0845	234	}
dcoban	0:1a61c61d0845	235
dcoban	0:1a61c61d0845	236	/* Check host unique token passed and return appropriate softc pointer,
dcoban	0:1a61c61d0845	237	* or NULL if token is bogus. */
dcoban	0:1a61c61d0845	238	static struct pppoe_softc *
dcoban	0:1a61c61d0845	239	pppoe_find_softc_by_hunique(u8_t token, size_t len, struct netif rcvif)
dcoban	0:1a61c61d0845	240	{
dcoban	0:1a61c61d0845	241	struct pppoe_softc sc, t;
dcoban	0:1a61c61d0845	242
dcoban	0:1a61c61d0845	243	if (pppoe_softc_list == NULL) {
dcoban	0:1a61c61d0845	244	return NULL;
dcoban	0:1a61c61d0845	245	}
dcoban	0:1a61c61d0845	246
dcoban	0:1a61c61d0845	247	if (len != sizeof sc) {
dcoban	0:1a61c61d0845	248	return NULL;
dcoban	0:1a61c61d0845	249	}
dcoban	0:1a61c61d0845	250	MEMCPY(&t, token, len);
dcoban	0:1a61c61d0845	251
dcoban	0:1a61c61d0845	252	for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
dcoban	0:1a61c61d0845	253	if (sc == t) {
dcoban	0:1a61c61d0845	254	break;
dcoban	0:1a61c61d0845	255	}
dcoban	0:1a61c61d0845	256	}
dcoban	0:1a61c61d0845	257
dcoban	0:1a61c61d0845	258	if (sc == NULL) {
dcoban	0:1a61c61d0845	259	PPPDEBUG(LOG_DEBUG, ("pppoe: alien host unique tag, no session found\n"));
dcoban	0:1a61c61d0845	260	return NULL;
dcoban	0:1a61c61d0845	261	}
dcoban	0:1a61c61d0845	262
dcoban	0:1a61c61d0845	263	/* should be safe to access sc now /
dcoban	0:1a61c61d0845	264	if (sc->sc_state < PPPOE_STATE_PADI_SENT \|\| sc->sc_state >= PPPOE_STATE_SESSION) {
dcoban	0:1a61c61d0845	265	printf("%c%c%"U16_F": host unique tag found, but it belongs to a connection in state %d\n",
dcoban	0:1a61c61d0845	266	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_state);
dcoban	0:1a61c61d0845	267	return NULL;
dcoban	0:1a61c61d0845	268	}
dcoban	0:1a61c61d0845	269	if (sc->sc_ethif != rcvif) {
dcoban	0:1a61c61d0845	270	printf("%c%c%"U16_F": wrong interface, not accepting host unique\n",
dcoban	0:1a61c61d0845	271	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
dcoban	0:1a61c61d0845	272	return NULL;
dcoban	0:1a61c61d0845	273	}
dcoban	0:1a61c61d0845	274	return sc;
dcoban	0:1a61c61d0845	275	}
dcoban	0:1a61c61d0845	276
dcoban	0:1a61c61d0845	277	static void
dcoban	0:1a61c61d0845	278	pppoe_linkstatus_up(struct pppoe_softc *sc)
dcoban	0:1a61c61d0845	279	{
dcoban	0:1a61c61d0845	280	sc->sc_linkStatusCB(sc->sc_pd, 1);
dcoban	0:1a61c61d0845	281	}
dcoban	0:1a61c61d0845	282
dcoban	0:1a61c61d0845	283	/* analyze and handle a single received packet while not in session state */
dcoban	0:1a61c61d0845	284	static void
dcoban	0:1a61c61d0845	285	pppoe_dispatch_disc_pkt(struct netif netif, struct pbuf pb)
dcoban	0:1a61c61d0845	286	{
dcoban	0:1a61c61d0845	287	u16_t tag, len;
dcoban	0:1a61c61d0845	288	u16_t session, plen;
dcoban	0:1a61c61d0845	289	struct pppoe_softc *sc;
dcoban	0:1a61c61d0845	290	const char *err_msg;
dcoban	0:1a61c61d0845	291	char devname[6];
dcoban	0:1a61c61d0845	292	u8_t *ac_cookie;
dcoban	0:1a61c61d0845	293	u16_t ac_cookie_len;
dcoban	0:1a61c61d0845	294	#ifdef PPPOE_SERVER
dcoban	0:1a61c61d0845	295	u8_t *hunique;
dcoban	0:1a61c61d0845	296	size_t hunique_len;
dcoban	0:1a61c61d0845	297	#endif
dcoban	0:1a61c61d0845	298	struct pppoehdr *ph;
dcoban	0:1a61c61d0845	299	struct pppoetag pt;
dcoban	0:1a61c61d0845	300	int off, err, errortag;
dcoban	0:1a61c61d0845	301	struct eth_hdr *ethhdr;
dcoban	0:1a61c61d0845	302
dcoban	0:1a61c61d0845	303	pb = pppSingleBuf(pb);
dcoban	0:1a61c61d0845	304
dcoban	0:1a61c61d0845	305	strcpy(devname, "pppoe"); /* as long as we don't know which instance */
dcoban	0:1a61c61d0845	306	err_msg = NULL;
dcoban	0:1a61c61d0845	307	errortag = 0;
dcoban	0:1a61c61d0845	308	if (pb->len < sizeof(*ethhdr)) {
dcoban	0:1a61c61d0845	309	goto done;
dcoban	0:1a61c61d0845	310	}
dcoban	0:1a61c61d0845	311	ethhdr = (struct eth_hdr *)pb->payload;
dcoban	0:1a61c61d0845	312	off = sizeof(*ethhdr);
dcoban	0:1a61c61d0845	313
dcoban	0:1a61c61d0845	314	ac_cookie = NULL;
dcoban	0:1a61c61d0845	315	ac_cookie_len = 0;
dcoban	0:1a61c61d0845	316	#ifdef PPPOE_SERVER
dcoban	0:1a61c61d0845	317	hunique = NULL;
dcoban	0:1a61c61d0845	318	hunique_len = 0;
dcoban	0:1a61c61d0845	319	#endif
dcoban	0:1a61c61d0845	320	session = 0;
dcoban	0:1a61c61d0845	321	if (pb->len - off < PPPOE_HEADERLEN) {
dcoban	0:1a61c61d0845	322	printf("pppoe: packet too short: %d\n", pb->len);
dcoban	0:1a61c61d0845	323	goto done;
dcoban	0:1a61c61d0845	324	}
dcoban	0:1a61c61d0845	325
dcoban	0:1a61c61d0845	326	ph = (struct pppoehdr *) (ethhdr + 1);
dcoban	0:1a61c61d0845	327	if (ph->vertype != PPPOE_VERTYPE) {
dcoban	0:1a61c61d0845	328	printf("pppoe: unknown version/type packet: 0x%x\n", ph->vertype);
dcoban	0:1a61c61d0845	329	goto done;
dcoban	0:1a61c61d0845	330	}
dcoban	0:1a61c61d0845	331	session = ntohs(ph->session);
dcoban	0:1a61c61d0845	332	plen = ntohs(ph->plen);
dcoban	0:1a61c61d0845	333	off += sizeof(*ph);
dcoban	0:1a61c61d0845	334
dcoban	0:1a61c61d0845	335	if (plen + off > pb->len) {
dcoban	0:1a61c61d0845	336	printf("pppoe: packet content does not fit: data available = %d, packet size = %u\n",
dcoban	0:1a61c61d0845	337	pb->len - off, plen);
dcoban	0:1a61c61d0845	338	goto done;
dcoban	0:1a61c61d0845	339	}
dcoban	0:1a61c61d0845	340	if(pb->tot_len == pb->len) {
dcoban	0:1a61c61d0845	341	pb->tot_len = pb->len = (u16_t)off + plen; /* ignore trailing garbage */
dcoban	0:1a61c61d0845	342	}
dcoban	0:1a61c61d0845	343	tag = 0;
dcoban	0:1a61c61d0845	344	len = 0;
dcoban	0:1a61c61d0845	345	sc = NULL;
dcoban	0:1a61c61d0845	346	while (off + sizeof(pt) <= pb->len) {
dcoban	0:1a61c61d0845	347	MEMCPY(&pt, (u8_t*)pb->payload + off, sizeof(pt));
dcoban	0:1a61c61d0845	348	tag = ntohs(pt.tag);
dcoban	0:1a61c61d0845	349	len = ntohs(pt.len);
dcoban	0:1a61c61d0845	350	if (off + sizeof(pt) + len > pb->len) {
dcoban	0:1a61c61d0845	351	printf("pppoe: tag 0x%x len 0x%x is too long\n", tag, len);
dcoban	0:1a61c61d0845	352	goto done;
dcoban	0:1a61c61d0845	353	}
dcoban	0:1a61c61d0845	354	switch (tag) {
dcoban	0:1a61c61d0845	355	case PPPOE_TAG_EOL:
dcoban	0:1a61c61d0845	356	goto breakbreak;
dcoban	0:1a61c61d0845	357	case PPPOE_TAG_SNAME:
dcoban	0:1a61c61d0845	358	break; /* ignored */
dcoban	0:1a61c61d0845	359	case PPPOE_TAG_ACNAME:
dcoban	0:1a61c61d0845	360	break; /* ignored */
dcoban	0:1a61c61d0845	361	case PPPOE_TAG_HUNIQUE:
dcoban	0:1a61c61d0845	362	if (sc != NULL) {
dcoban	0:1a61c61d0845	363	break;
dcoban	0:1a61c61d0845	364	}
dcoban	0:1a61c61d0845	365	#ifdef PPPOE_SERVER
dcoban	0:1a61c61d0845	366	hunique = (u8_t*)pb->payload + off + sizeof(pt);
dcoban	0:1a61c61d0845	367	hunique_len = len;
dcoban	0:1a61c61d0845	368	#endif
dcoban	0:1a61c61d0845	369	sc = pppoe_find_softc_by_hunique((u8_t*)pb->payload + off + sizeof(pt), len, netif);
dcoban	0:1a61c61d0845	370	if (sc != NULL) {
dcoban	0:1a61c61d0845	371	snprintf(devname, sizeof(devname), "%c%c%"U16_F, sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
dcoban	0:1a61c61d0845	372	}
dcoban	0:1a61c61d0845	373	break;
dcoban	0:1a61c61d0845	374	case PPPOE_TAG_ACCOOKIE:
dcoban	0:1a61c61d0845	375	if (ac_cookie == NULL) {
dcoban	0:1a61c61d0845	376	ac_cookie = (u8_t*)pb->payload + off + sizeof(pt);
dcoban	0:1a61c61d0845	377	ac_cookie_len = len;
dcoban	0:1a61c61d0845	378	}
dcoban	0:1a61c61d0845	379	break;
dcoban	0:1a61c61d0845	380	case PPPOE_TAG_SNAME_ERR:
dcoban	0:1a61c61d0845	381	err_msg = "SERVICE NAME ERROR";
dcoban	0:1a61c61d0845	382	errortag = 1;
dcoban	0:1a61c61d0845	383	break;
dcoban	0:1a61c61d0845	384	case PPPOE_TAG_ACSYS_ERR:
dcoban	0:1a61c61d0845	385	err_msg = "AC SYSTEM ERROR";
dcoban	0:1a61c61d0845	386	errortag = 1;
dcoban	0:1a61c61d0845	387	break;
dcoban	0:1a61c61d0845	388	case PPPOE_TAG_GENERIC_ERR:
dcoban	0:1a61c61d0845	389	err_msg = "GENERIC ERROR";
dcoban	0:1a61c61d0845	390	errortag = 1;
dcoban	0:1a61c61d0845	391	break;
dcoban	0:1a61c61d0845	392	}
dcoban	0:1a61c61d0845	393	if (err_msg) {
dcoban	0:1a61c61d0845	394	if (errortag && len) {
dcoban	0:1a61c61d0845	395	u16_t error_len = LWIP_MIN(len, sizeof(pppoe_error_tmp)-1);
dcoban	0:1a61c61d0845	396	strncpy(pppoe_error_tmp, (char*)pb->payload + off + sizeof(pt), error_len);
dcoban	0:1a61c61d0845	397	pppoe_error_tmp[error_len-1] = '\0';
dcoban	0:1a61c61d0845	398	printf("%s: %s: %s\n", devname, err_msg, pppoe_error_tmp);
dcoban	0:1a61c61d0845	399	} else {
dcoban	0:1a61c61d0845	400	printf("%s: %s\n", devname, err_msg);
dcoban	0:1a61c61d0845	401	}
dcoban	0:1a61c61d0845	402	if (errortag) {
dcoban	0:1a61c61d0845	403	goto done;
dcoban	0:1a61c61d0845	404	}
dcoban	0:1a61c61d0845	405	}
dcoban	0:1a61c61d0845	406	off += sizeof(pt) + len;
dcoban	0:1a61c61d0845	407	}
dcoban	0:1a61c61d0845	408
dcoban	0:1a61c61d0845	409	breakbreak:;
dcoban	0:1a61c61d0845	410	switch (ph->code) {
dcoban	0:1a61c61d0845	411	case PPPOE_CODE_PADI:
dcoban	0:1a61c61d0845	412	#ifdef PPPOE_SERVER
dcoban	0:1a61c61d0845	413	/*
dcoban	0:1a61c61d0845	414	* got service name, concentrator name, and/or host unique.
dcoban	0:1a61c61d0845	415	* ignore if we have no interfaces with IFF_PASSIVE\|IFF_UP.
dcoban	0:1a61c61d0845	416	*/
dcoban	0:1a61c61d0845	417	if (LIST_EMPTY(&pppoe_softc_list)) {
dcoban	0:1a61c61d0845	418	goto done;
dcoban	0:1a61c61d0845	419	}
dcoban	0:1a61c61d0845	420	LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
dcoban	0:1a61c61d0845	421	if (!(sc->sc_sppp.pp_if.if_flags & IFF_UP)) {
dcoban	0:1a61c61d0845	422	continue;
dcoban	0:1a61c61d0845	423	}
dcoban	0:1a61c61d0845	424	if (!(sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
dcoban	0:1a61c61d0845	425	continue;
dcoban	0:1a61c61d0845	426	}
dcoban	0:1a61c61d0845	427	if (sc->sc_state == PPPOE_STATE_INITIAL) {
dcoban	0:1a61c61d0845	428	break;
dcoban	0:1a61c61d0845	429	}
dcoban	0:1a61c61d0845	430	}
dcoban	0:1a61c61d0845	431	if (sc == NULL) {
dcoban	0:1a61c61d0845	432	/* printf("pppoe: free passive interface is not found\n"); */
dcoban	0:1a61c61d0845	433	goto done;
dcoban	0:1a61c61d0845	434	}
dcoban	0:1a61c61d0845	435	if (hunique) {
dcoban	0:1a61c61d0845	436	if (sc->sc_hunique) {
dcoban	0:1a61c61d0845	437	mem_free(sc->sc_hunique);
dcoban	0:1a61c61d0845	438	}
dcoban	0:1a61c61d0845	439	sc->sc_hunique = mem_malloc(hunique_len);
dcoban	0:1a61c61d0845	440	if (sc->sc_hunique == NULL) {
dcoban	0:1a61c61d0845	441	goto done;
dcoban	0:1a61c61d0845	442	}
dcoban	0:1a61c61d0845	443	sc->sc_hunique_len = hunique_len;
dcoban	0:1a61c61d0845	444	MEMCPY(sc->sc_hunique, hunique, hunique_len);
dcoban	0:1a61c61d0845	445	}
dcoban	0:1a61c61d0845	446	MEMCPY(&sc->sc_dest, eh->ether_shost, sizeof sc->sc_dest);
dcoban	0:1a61c61d0845	447	sc->sc_state = PPPOE_STATE_PADO_SENT;
dcoban	0:1a61c61d0845	448	pppoe_send_pado(sc);
dcoban	0:1a61c61d0845	449	break;
dcoban	0:1a61c61d0845	450	#endif /* PPPOE_SERVER */
dcoban	0:1a61c61d0845	451	case PPPOE_CODE_PADR:
dcoban	0:1a61c61d0845	452	#ifdef PPPOE_SERVER
dcoban	0:1a61c61d0845	453	/*
dcoban	0:1a61c61d0845	454	* get sc from ac_cookie if IFF_PASSIVE
dcoban	0:1a61c61d0845	455	*/
dcoban	0:1a61c61d0845	456	if (ac_cookie == NULL) {
dcoban	0:1a61c61d0845	457	/* be quiet if there is not a single pppoe instance */
dcoban	0:1a61c61d0845	458	printf("pppoe: received PADR but not includes ac_cookie\n");
dcoban	0:1a61c61d0845	459	goto done;
dcoban	0:1a61c61d0845	460	}
dcoban	0:1a61c61d0845	461	sc = pppoe_find_softc_by_hunique(ac_cookie, ac_cookie_len, netif);
dcoban	0:1a61c61d0845	462	if (sc == NULL) {
dcoban	0:1a61c61d0845	463	/* be quiet if there is not a single pppoe instance */
dcoban	0:1a61c61d0845	464	if (!LIST_EMPTY(&pppoe_softc_list)) {
dcoban	0:1a61c61d0845	465	printf("pppoe: received PADR but could not find request for it\n");
dcoban	0:1a61c61d0845	466	}
dcoban	0:1a61c61d0845	467	goto done;
dcoban	0:1a61c61d0845	468	}
dcoban	0:1a61c61d0845	469	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
dcoban	0:1a61c61d0845	470	printf("%c%c%"U16_F": received unexpected PADR\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
dcoban	0:1a61c61d0845	471	goto done;
dcoban	0:1a61c61d0845	472	}
dcoban	0:1a61c61d0845	473	if (hunique) {
dcoban	0:1a61c61d0845	474	if (sc->sc_hunique) {
dcoban	0:1a61c61d0845	475	mem_free(sc->sc_hunique);
dcoban	0:1a61c61d0845	476	}
dcoban	0:1a61c61d0845	477	sc->sc_hunique = mem_malloc(hunique_len);
dcoban	0:1a61c61d0845	478	if (sc->sc_hunique == NULL) {
dcoban	0:1a61c61d0845	479	goto done;
dcoban	0:1a61c61d0845	480	}
dcoban	0:1a61c61d0845	481	sc->sc_hunique_len = hunique_len;
dcoban	0:1a61c61d0845	482	MEMCPY(sc->sc_hunique, hunique, hunique_len);
dcoban	0:1a61c61d0845	483	}
dcoban	0:1a61c61d0845	484	pppoe_send_pads(sc);
dcoban	0:1a61c61d0845	485	sc->sc_state = PPPOE_STATE_SESSION;
dcoban	0:1a61c61d0845	486	pppoe_linkstatus_up(sc); /* notify upper layers */
dcoban	0:1a61c61d0845	487	break;
dcoban	0:1a61c61d0845	488	#else
dcoban	0:1a61c61d0845	489	/* ignore, we are no access concentrator */
dcoban	0:1a61c61d0845	490	goto done;
dcoban	0:1a61c61d0845	491	#endif /* PPPOE_SERVER */
dcoban	0:1a61c61d0845	492	case PPPOE_CODE_PADO:
dcoban	0:1a61c61d0845	493	if (sc == NULL) {
dcoban	0:1a61c61d0845	494	/* be quiet if there is not a single pppoe instance */
dcoban	0:1a61c61d0845	495	if (pppoe_softc_list != NULL) {
dcoban	0:1a61c61d0845	496	printf("pppoe: received PADO but could not find request for it\n");
dcoban	0:1a61c61d0845	497	}
dcoban	0:1a61c61d0845	498	goto done;
dcoban	0:1a61c61d0845	499	}
dcoban	0:1a61c61d0845	500	if (sc->sc_state != PPPOE_STATE_PADI_SENT) {
dcoban	0:1a61c61d0845	501	printf("%c%c%"U16_F": received unexpected PADO\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
dcoban	0:1a61c61d0845	502	goto done;
dcoban	0:1a61c61d0845	503	}
dcoban	0:1a61c61d0845	504	if (ac_cookie) {
dcoban	0:1a61c61d0845	505	sc->sc_ac_cookie_len = ac_cookie_len;
dcoban	0:1a61c61d0845	506	MEMCPY(sc->sc_ac_cookie, ac_cookie, ac_cookie_len);
dcoban	0:1a61c61d0845	507	}
dcoban	0:1a61c61d0845	508	MEMCPY(&sc->sc_dest, ethhdr->src.addr, sizeof(sc->sc_dest.addr));
dcoban	0:1a61c61d0845	509	sys_untimeout(pppoe_timeout, sc);
dcoban	0:1a61c61d0845	510	sc->sc_padr_retried = 0;
dcoban	0:1a61c61d0845	511	sc->sc_state = PPPOE_STATE_PADR_SENT;
dcoban	0:1a61c61d0845	512	if ((err = pppoe_send_padr(sc)) != 0) {
dcoban	0:1a61c61d0845	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));
dcoban	0:1a61c61d0845	514	}
dcoban	0:1a61c61d0845	515	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
dcoban	0:1a61c61d0845	516	break;
dcoban	0:1a61c61d0845	517	case PPPOE_CODE_PADS:
dcoban	0:1a61c61d0845	518	if (sc == NULL) {
dcoban	0:1a61c61d0845	519	goto done;
dcoban	0:1a61c61d0845	520	}
dcoban	0:1a61c61d0845	521	sc->sc_session = session;
dcoban	0:1a61c61d0845	522	sys_untimeout(pppoe_timeout, sc);
dcoban	0:1a61c61d0845	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));
dcoban	0:1a61c61d0845	524	sc->sc_state = PPPOE_STATE_SESSION;
dcoban	0:1a61c61d0845	525	pppoe_linkstatus_up(sc); /* notify upper layers */
dcoban	0:1a61c61d0845	526	break;
dcoban	0:1a61c61d0845	527	case PPPOE_CODE_PADT:
dcoban	0:1a61c61d0845	528	if (sc == NULL) {
dcoban	0:1a61c61d0845	529	goto done;
dcoban	0:1a61c61d0845	530	}
dcoban	0:1a61c61d0845	531	pppoe_clear_softc(sc, "received PADT");
dcoban	0:1a61c61d0845	532	break;
dcoban	0:1a61c61d0845	533	default:
dcoban	0:1a61c61d0845	534	if(sc) {
dcoban	0:1a61c61d0845	535	printf("%c%c%"U16_F": unknown code (0x%"X16_F") session = 0x%"X16_F"\n",
dcoban	0:1a61c61d0845	536	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
dcoban	0:1a61c61d0845	537	(u16_t)ph->code, session);
dcoban	0:1a61c61d0845	538	} else {
dcoban	0:1a61c61d0845	539	printf("pppoe: unknown code (0x%"X16_F") session = 0x%"X16_F"\n", (u16_t)ph->code, session);
dcoban	0:1a61c61d0845	540	}
dcoban	0:1a61c61d0845	541	break;
dcoban	0:1a61c61d0845	542	}
dcoban	0:1a61c61d0845	543
dcoban	0:1a61c61d0845	544	done:
dcoban	0:1a61c61d0845	545	pbuf_free(pb);
dcoban	0:1a61c61d0845	546	return;
dcoban	0:1a61c61d0845	547	}
dcoban	0:1a61c61d0845	548
dcoban	0:1a61c61d0845	549	void
dcoban	0:1a61c61d0845	550	pppoe_disc_input(struct netif netif, struct pbuf p)
dcoban	0:1a61c61d0845	551	{
dcoban	0:1a61c61d0845	552	/* avoid error messages if there is not a single pppoe instance */
dcoban	0:1a61c61d0845	553	if (pppoe_softc_list != NULL) {
dcoban	0:1a61c61d0845	554	pppoe_dispatch_disc_pkt(netif, p);
dcoban	0:1a61c61d0845	555	} else {
dcoban	0:1a61c61d0845	556	pbuf_free(p);
dcoban	0:1a61c61d0845	557	}
dcoban	0:1a61c61d0845	558	}
dcoban	0:1a61c61d0845	559
dcoban	0:1a61c61d0845	560	void
dcoban	0:1a61c61d0845	561	pppoe_data_input(struct netif netif, struct pbuf pb)
dcoban	0:1a61c61d0845	562	{
dcoban	0:1a61c61d0845	563	u16_t session, plen;
dcoban	0:1a61c61d0845	564	struct pppoe_softc *sc;
dcoban	0:1a61c61d0845	565	struct pppoehdr *ph;
dcoban	0:1a61c61d0845	566	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
dcoban	0:1a61c61d0845	567	u8_t shost[ETHER_ADDR_LEN];
dcoban	0:1a61c61d0845	568	#endif
dcoban	0:1a61c61d0845	569
dcoban	0:1a61c61d0845	570	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
dcoban	0:1a61c61d0845	571	MEMCPY(shost, ((struct eth_hdr *)pb->payload)->src.addr, sizeof(shost));
dcoban	0:1a61c61d0845	572	#endif
dcoban	0:1a61c61d0845	573	if (pbuf_header(pb, -(int)sizeof(struct eth_hdr)) != 0) {
dcoban	0:1a61c61d0845	574	/* bail out */
dcoban	0:1a61c61d0845	575	PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header failed\n"));
dcoban	0:1a61c61d0845	576	LINK_STATS_INC(link.lenerr);
dcoban	0:1a61c61d0845	577	goto drop;
dcoban	0:1a61c61d0845	578	}
dcoban	0:1a61c61d0845	579
dcoban	0:1a61c61d0845	580	pb = pppSingleBuf (pb);
dcoban	0:1a61c61d0845	581
dcoban	0:1a61c61d0845	582	if (pb->len <= PPPOE_HEADERLEN) {
dcoban	0:1a61c61d0845	583	printf("pppoe (data): dropping too short packet: %d bytes\n", pb->len);
dcoban	0:1a61c61d0845	584	goto drop;
dcoban	0:1a61c61d0845	585	}
dcoban	0:1a61c61d0845	586
dcoban	0:1a61c61d0845	587	if (pb->len < sizeof(*ph)) {
dcoban	0:1a61c61d0845	588	printf("pppoe_data_input: could not get PPPoE header\n");
dcoban	0:1a61c61d0845	589	goto drop;
dcoban	0:1a61c61d0845	590	}
dcoban	0:1a61c61d0845	591	ph = (struct pppoehdr *)pb->payload;
dcoban	0:1a61c61d0845	592
dcoban	0:1a61c61d0845	593	if (ph->vertype != PPPOE_VERTYPE) {
dcoban	0:1a61c61d0845	594	printf("pppoe (data): unknown version/type packet: 0x%x\n", ph->vertype);
dcoban	0:1a61c61d0845	595	goto drop;
dcoban	0:1a61c61d0845	596	}
dcoban	0:1a61c61d0845	597	if (ph->code != 0) {
dcoban	0:1a61c61d0845	598	goto drop;
dcoban	0:1a61c61d0845	599	}
dcoban	0:1a61c61d0845	600
dcoban	0:1a61c61d0845	601	session = ntohs(ph->session);
dcoban	0:1a61c61d0845	602	sc = pppoe_find_softc_by_session(session, netif);
dcoban	0:1a61c61d0845	603	if (sc == NULL) {
dcoban	0:1a61c61d0845	604	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
dcoban	0:1a61c61d0845	605	printf("pppoe: input for unknown session 0x%x, sending PADT\n", session);
dcoban	0:1a61c61d0845	606	pppoe_send_padt(netif, session, shost);
dcoban	0:1a61c61d0845	607	#endif
dcoban	0:1a61c61d0845	608	goto drop;
dcoban	0:1a61c61d0845	609	}
dcoban	0:1a61c61d0845	610
dcoban	0:1a61c61d0845	611	plen = ntohs(ph->plen);
dcoban	0:1a61c61d0845	612
dcoban	0:1a61c61d0845	613	if (pbuf_header(pb, -(int)(PPPOE_HEADERLEN)) != 0) {
dcoban	0:1a61c61d0845	614	/* bail out */
dcoban	0:1a61c61d0845	615	PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header PPPOE_HEADERLEN failed\n"));
dcoban	0:1a61c61d0845	616	LINK_STATS_INC(link.lenerr);
dcoban	0:1a61c61d0845	617	goto drop;
dcoban	0:1a61c61d0845	618	}
dcoban	0:1a61c61d0845	619
dcoban	0:1a61c61d0845	620	PPPDEBUG(LOG_DEBUG, ("pppoe_data_input: %c%c%"U16_F": pkthdr.len=%d, pppoe.len=%d\n",
dcoban	0:1a61c61d0845	621	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
dcoban	0:1a61c61d0845	622	pb->len, plen));
dcoban	0:1a61c61d0845	623
dcoban	0:1a61c61d0845	624	if (pb->len < plen) {
dcoban	0:1a61c61d0845	625	goto drop;
dcoban	0:1a61c61d0845	626	}
dcoban	0:1a61c61d0845	627
dcoban	0:1a61c61d0845	628	pppInProcOverEthernet(sc->sc_pd, pb);
dcoban	0:1a61c61d0845	629
dcoban	0:1a61c61d0845	630	return;
dcoban	0:1a61c61d0845	631
dcoban	0:1a61c61d0845	632	drop:
dcoban	0:1a61c61d0845	633	pbuf_free(pb);
dcoban	0:1a61c61d0845	634	}
dcoban	0:1a61c61d0845	635
dcoban	0:1a61c61d0845	636	static err_t
dcoban	0:1a61c61d0845	637	pppoe_output(struct pppoe_softc sc, struct pbuf pb)
dcoban	0:1a61c61d0845	638	{
dcoban	0:1a61c61d0845	639	struct eth_hdr *ethhdr;
dcoban	0:1a61c61d0845	640	u16_t etype;
dcoban	0:1a61c61d0845	641	err_t res;
dcoban	0:1a61c61d0845	642
dcoban	0:1a61c61d0845	643	if (!sc->sc_ethif) {
dcoban	0:1a61c61d0845	644	pbuf_free(pb);
dcoban	0:1a61c61d0845	645	return ERR_IF;
dcoban	0:1a61c61d0845	646	}
dcoban	0:1a61c61d0845	647
dcoban	0:1a61c61d0845	648	ethhdr = (struct eth_hdr *)pb->payload;
dcoban	0:1a61c61d0845	649	etype = sc->sc_state == PPPOE_STATE_SESSION ? ETHTYPE_PPPOE : ETHTYPE_PPPOEDISC;
dcoban	0:1a61c61d0845	650	ethhdr->type = htons(etype);
dcoban	0:1a61c61d0845	651	MEMCPY(ethhdr->dest.addr, sc->sc_dest.addr, sizeof(ethhdr->dest.addr));
dcoban	0:1a61c61d0845	652	MEMCPY(ethhdr->src.addr, ((struct eth_addr *)sc->sc_ethif->hwaddr)->addr, sizeof(ethhdr->src.addr));
dcoban	0:1a61c61d0845	653
dcoban	0:1a61c61d0845	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",
dcoban	0:1a61c61d0845	655	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, etype,
dcoban	0:1a61c61d0845	656	sc->sc_state, sc->sc_session,
dcoban	0:1a61c61d0845	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],
dcoban	0:1a61c61d0845	658	pb->tot_len));
dcoban	0:1a61c61d0845	659
dcoban	0:1a61c61d0845	660	res = sc->sc_ethif->linkoutput(sc->sc_ethif, pb);
dcoban	0:1a61c61d0845	661
dcoban	0:1a61c61d0845	662	pbuf_free(pb);
dcoban	0:1a61c61d0845	663
dcoban	0:1a61c61d0845	664	return res;
dcoban	0:1a61c61d0845	665	}
dcoban	0:1a61c61d0845	666
dcoban	0:1a61c61d0845	667	static err_t
dcoban	0:1a61c61d0845	668	pppoe_send_padi(struct pppoe_softc *sc)
dcoban	0:1a61c61d0845	669	{
dcoban	0:1a61c61d0845	670	struct pbuf *pb;
dcoban	0:1a61c61d0845	671	u8_t *p;
dcoban	0:1a61c61d0845	672	int len;
dcoban	0:1a61c61d0845	673	#ifdef PPPOE_TODO
dcoban	0:1a61c61d0845	674	int l1 = 0, l2 = 0; /* XXX: gcc */
dcoban	0:1a61c61d0845	675	#endif /* PPPOE_TODO */
dcoban	0:1a61c61d0845	676
dcoban	0:1a61c61d0845	677	if (sc->sc_state >PPPOE_STATE_PADI_SENT) {
dcoban	0:1a61c61d0845	678	PPPDEBUG(LOG_ERR, ("ERROR: pppoe_send_padi in state %d", sc->sc_state));
dcoban	0:1a61c61d0845	679	}
dcoban	0:1a61c61d0845	680
dcoban	0:1a61c61d0845	681	/* calculate length of frame (excluding ethernet header + pppoe header) */
dcoban	0:1a61c61d0845	682	len = 2 + 2 + 2 + 2 + sizeof sc; /* service name tag is required, host unique is send too */
dcoban	0:1a61c61d0845	683	#ifdef PPPOE_TODO
dcoban	0:1a61c61d0845	684	if (sc->sc_service_name != NULL) {
dcoban	0:1a61c61d0845	685	l1 = (int)strlen(sc->sc_service_name);
dcoban	0:1a61c61d0845	686	len += l1;
dcoban	0:1a61c61d0845	687	}
dcoban	0:1a61c61d0845	688	if (sc->sc_concentrator_name != NULL) {
dcoban	0:1a61c61d0845	689	l2 = (int)strlen(sc->sc_concentrator_name);
dcoban	0:1a61c61d0845	690	len += 2 + 2 + l2;
dcoban	0:1a61c61d0845	691	}
dcoban	0:1a61c61d0845	692	#endif /* PPPOE_TODO */
dcoban	0:1a61c61d0845	693	LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
dcoban	0:1a61c61d0845	694	sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
dcoban	0:1a61c61d0845	695
dcoban	0:1a61c61d0845	696	/* allocate a buffer */
dcoban	0:1a61c61d0845	697	pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
dcoban	0:1a61c61d0845	698	if (!pb) {
dcoban	0:1a61c61d0845	699	return ERR_MEM;
dcoban	0:1a61c61d0845	700	}
dcoban	0:1a61c61d0845	701	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
dcoban	0:1a61c61d0845	702
dcoban	0:1a61c61d0845	703	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
dcoban	0:1a61c61d0845	704	/* fill in pkt */
dcoban	0:1a61c61d0845	705	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADI, 0, (u16_t)len);
dcoban	0:1a61c61d0845	706	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
dcoban	0:1a61c61d0845	707	#ifdef PPPOE_TODO
dcoban	0:1a61c61d0845	708	if (sc->sc_service_name != NULL) {
dcoban	0:1a61c61d0845	709	PPPOE_ADD_16(p, l1);
dcoban	0:1a61c61d0845	710	MEMCPY(p, sc->sc_service_name, l1);
dcoban	0:1a61c61d0845	711	p += l1;
dcoban	0:1a61c61d0845	712	} else
dcoban	0:1a61c61d0845	713	#endif /* PPPOE_TODO */
dcoban	0:1a61c61d0845	714	{
dcoban	0:1a61c61d0845	715	PPPOE_ADD_16(p, 0);
dcoban	0:1a61c61d0845	716	}
dcoban	0:1a61c61d0845	717	#ifdef PPPOE_TODO
dcoban	0:1a61c61d0845	718	if (sc->sc_concentrator_name != NULL) {
dcoban	0:1a61c61d0845	719	PPPOE_ADD_16(p, PPPOE_TAG_ACNAME);
dcoban	0:1a61c61d0845	720	PPPOE_ADD_16(p, l2);
dcoban	0:1a61c61d0845	721	MEMCPY(p, sc->sc_concentrator_name, l2);
dcoban	0:1a61c61d0845	722	p += l2;
dcoban	0:1a61c61d0845	723	}
dcoban	0:1a61c61d0845	724	#endif /* PPPOE_TODO */
dcoban	0:1a61c61d0845	725	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
dcoban	0:1a61c61d0845	726	PPPOE_ADD_16(p, sizeof(sc));
dcoban	0:1a61c61d0845	727	MEMCPY(p, &sc, sizeof sc);
dcoban	0:1a61c61d0845	728
dcoban	0:1a61c61d0845	729	/* send pkt */
dcoban	0:1a61c61d0845	730	return pppoe_output(sc, pb);
dcoban	0:1a61c61d0845	731	}
dcoban	0:1a61c61d0845	732
dcoban	0:1a61c61d0845	733	static void
dcoban	0:1a61c61d0845	734	pppoe_timeout(void *arg)
dcoban	0:1a61c61d0845	735	{
dcoban	0:1a61c61d0845	736	int retry_wait, err;
dcoban	0:1a61c61d0845	737	struct pppoe_softc sc = (struct pppoe_softc)arg;
dcoban	0:1a61c61d0845	738
dcoban	0:1a61c61d0845	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));
dcoban	0:1a61c61d0845	740
dcoban	0:1a61c61d0845	741	switch (sc->sc_state) {
dcoban	0:1a61c61d0845	742	case PPPOE_STATE_PADI_SENT:
dcoban	0:1a61c61d0845	743	/*
dcoban	0:1a61c61d0845	744	* We have two basic ways of retrying:
dcoban	0:1a61c61d0845	745	* - Quick retry mode: try a few times in short sequence
dcoban	0:1a61c61d0845	746	* - Slow retry mode: we already had a connection successfully
dcoban	0:1a61c61d0845	747	* established and will try infinitely (without user
dcoban	0:1a61c61d0845	748	* intervention)
dcoban	0:1a61c61d0845	749	* We only enter slow retry mode if IFF_LINK1 (aka autodial)
dcoban	0:1a61c61d0845	750	* is not set.
dcoban	0:1a61c61d0845	751	*/
dcoban	0:1a61c61d0845	752
dcoban	0:1a61c61d0845	753	/* initialize for quick retry mode */
dcoban	0:1a61c61d0845	754	retry_wait = PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried);
dcoban	0:1a61c61d0845	755
dcoban	0:1a61c61d0845	756	sc->sc_padi_retried++;
dcoban	0:1a61c61d0845	757	if (sc->sc_padi_retried >= PPPOE_DISC_MAXPADI) {
dcoban	0:1a61c61d0845	758	#if 0
dcoban	0:1a61c61d0845	759	if ((sc->sc_sppp.pp_if.if_flags & IFF_LINK1) == 0) {
dcoban	0:1a61c61d0845	760	/* slow retry mode */
dcoban	0:1a61c61d0845	761	retry_wait = PPPOE_SLOW_RETRY;
dcoban	0:1a61c61d0845	762	} else
dcoban	0:1a61c61d0845	763	#endif
dcoban	0:1a61c61d0845	764	{
dcoban	0:1a61c61d0845	765	pppoe_abort_connect(sc);
dcoban	0:1a61c61d0845	766	return;
dcoban	0:1a61c61d0845	767	}
dcoban	0:1a61c61d0845	768	}
dcoban	0:1a61c61d0845	769	if ((err = pppoe_send_padi(sc)) != 0) {
dcoban	0:1a61c61d0845	770	sc->sc_padi_retried--;
dcoban	0:1a61c61d0845	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));
dcoban	0:1a61c61d0845	772	}
dcoban	0:1a61c61d0845	773	sys_timeout(retry_wait, pppoe_timeout, sc);
dcoban	0:1a61c61d0845	774	break;
dcoban	0:1a61c61d0845	775
dcoban	0:1a61c61d0845	776	case PPPOE_STATE_PADR_SENT:
dcoban	0:1a61c61d0845	777	sc->sc_padr_retried++;
dcoban	0:1a61c61d0845	778	if (sc->sc_padr_retried >= PPPOE_DISC_MAXPADR) {
dcoban	0:1a61c61d0845	779	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
dcoban	0:1a61c61d0845	780	sc->sc_state = PPPOE_STATE_PADI_SENT;
dcoban	0:1a61c61d0845	781	sc->sc_padr_retried = 0;
dcoban	0:1a61c61d0845	782	if ((err = pppoe_send_padi(sc)) != 0) {
dcoban	0:1a61c61d0845	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));
dcoban	0:1a61c61d0845	784	}
dcoban	0:1a61c61d0845	785	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried), pppoe_timeout, sc);
dcoban	0:1a61c61d0845	786	return;
dcoban	0:1a61c61d0845	787	}
dcoban	0:1a61c61d0845	788	if ((err = pppoe_send_padr(sc)) != 0) {
dcoban	0:1a61c61d0845	789	sc->sc_padr_retried--;
dcoban	0:1a61c61d0845	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));
dcoban	0:1a61c61d0845	791	}
dcoban	0:1a61c61d0845	792	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
dcoban	0:1a61c61d0845	793	break;
dcoban	0:1a61c61d0845	794	case PPPOE_STATE_CLOSING:
dcoban	0:1a61c61d0845	795	pppoe_do_disconnect(sc);
dcoban	0:1a61c61d0845	796	break;
dcoban	0:1a61c61d0845	797	default:
dcoban	0:1a61c61d0845	798	return; /* all done, work in peace */
dcoban	0:1a61c61d0845	799	}
dcoban	0:1a61c61d0845	800	}
dcoban	0:1a61c61d0845	801
dcoban	0:1a61c61d0845	802	/* Start a connection (i.e. initiate discovery phase) */
dcoban	0:1a61c61d0845	803	int
dcoban	0:1a61c61d0845	804	pppoe_connect(struct pppoe_softc *sc)
dcoban	0:1a61c61d0845	805	{
dcoban	0:1a61c61d0845	806	int err;
dcoban	0:1a61c61d0845	807
dcoban	0:1a61c61d0845	808	if (sc->sc_state != PPPOE_STATE_INITIAL) {
dcoban	0:1a61c61d0845	809	return EBUSY;
dcoban	0:1a61c61d0845	810	}
dcoban	0:1a61c61d0845	811
dcoban	0:1a61c61d0845	812	#ifdef PPPOE_SERVER
dcoban	0:1a61c61d0845	813	/* wait PADI if IFF_PASSIVE */
dcoban	0:1a61c61d0845	814	if ((sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
dcoban	0:1a61c61d0845	815	return 0;
dcoban	0:1a61c61d0845	816	}
dcoban	0:1a61c61d0845	817	#endif
dcoban	0:1a61c61d0845	818	/* save state, in case we fail to send PADI */
dcoban	0:1a61c61d0845	819	sc->sc_state = PPPOE_STATE_PADI_SENT;
dcoban	0:1a61c61d0845	820	sc->sc_padr_retried = 0;
dcoban	0:1a61c61d0845	821	err = pppoe_send_padi(sc);
dcoban	0:1a61c61d0845	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));
dcoban	0:1a61c61d0845	823	sys_timeout(PPPOE_DISC_TIMEOUT, pppoe_timeout, sc);
dcoban	0:1a61c61d0845	824	return err;
dcoban	0:1a61c61d0845	825	}
dcoban	0:1a61c61d0845	826
dcoban	0:1a61c61d0845	827	/* disconnect */
dcoban	0:1a61c61d0845	828	void
dcoban	0:1a61c61d0845	829	pppoe_disconnect(struct pppoe_softc *sc)
dcoban	0:1a61c61d0845	830	{
dcoban	0:1a61c61d0845	831	if (sc->sc_state < PPPOE_STATE_SESSION) {
dcoban	0:1a61c61d0845	832	return;
dcoban	0:1a61c61d0845	833	}
dcoban	0:1a61c61d0845	834	/*
dcoban	0:1a61c61d0845	835	* Do not call pppoe_disconnect here, the upper layer state
dcoban	0:1a61c61d0845	836	* machine gets confused by this. We must return from this
dcoban	0:1a61c61d0845	837	* function and defer disconnecting to the timeout handler.
dcoban	0:1a61c61d0845	838	*/
dcoban	0:1a61c61d0845	839	sc->sc_state = PPPOE_STATE_CLOSING;
dcoban	0:1a61c61d0845	840	sys_timeout(20, pppoe_timeout, sc);
dcoban	0:1a61c61d0845	841	}
dcoban	0:1a61c61d0845	842
dcoban	0:1a61c61d0845	843	static int
dcoban	0:1a61c61d0845	844	pppoe_do_disconnect(struct pppoe_softc *sc)
dcoban	0:1a61c61d0845	845	{
dcoban	0:1a61c61d0845	846	int err;
dcoban	0:1a61c61d0845	847
dcoban	0:1a61c61d0845	848	if (sc->sc_state < PPPOE_STATE_SESSION) {
dcoban	0:1a61c61d0845	849	err = EBUSY;
dcoban	0:1a61c61d0845	850	} else {
dcoban	0:1a61c61d0845	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));
dcoban	0:1a61c61d0845	852	err = pppoe_send_padt(sc->sc_ethif, sc->sc_session, (const u8_t *)&sc->sc_dest);
dcoban	0:1a61c61d0845	853	}
dcoban	0:1a61c61d0845	854
dcoban	0:1a61c61d0845	855	/* cleanup softc */
dcoban	0:1a61c61d0845	856	sc->sc_state = PPPOE_STATE_INITIAL;
dcoban	0:1a61c61d0845	857	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
dcoban	0:1a61c61d0845	858	sc->sc_ac_cookie_len = 0;
dcoban	0:1a61c61d0845	859	#ifdef PPPOE_SERVER
dcoban	0:1a61c61d0845	860	if (sc->sc_hunique) {
dcoban	0:1a61c61d0845	861	mem_free(sc->sc_hunique);
dcoban	0:1a61c61d0845	862	sc->sc_hunique = NULL;
dcoban	0:1a61c61d0845	863	}
dcoban	0:1a61c61d0845	864	sc->sc_hunique_len = 0;
dcoban	0:1a61c61d0845	865	#endif
dcoban	0:1a61c61d0845	866	sc->sc_session = 0;
dcoban	0:1a61c61d0845	867
dcoban	0:1a61c61d0845	868	sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
dcoban	0:1a61c61d0845	869
dcoban	0:1a61c61d0845	870	return err;
dcoban	0:1a61c61d0845	871	}
dcoban	0:1a61c61d0845	872
dcoban	0:1a61c61d0845	873	/* Connection attempt aborted */
dcoban	0:1a61c61d0845	874	static void
dcoban	0:1a61c61d0845	875	pppoe_abort_connect(struct pppoe_softc *sc)
dcoban	0:1a61c61d0845	876	{
dcoban	0:1a61c61d0845	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);
dcoban	0:1a61c61d0845	878	sc->sc_state = PPPOE_STATE_CLOSING;
dcoban	0:1a61c61d0845	879
dcoban	0:1a61c61d0845	880	sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
dcoban	0:1a61c61d0845	881
dcoban	0:1a61c61d0845	882	/* clear connection state */
dcoban	0:1a61c61d0845	883	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
dcoban	0:1a61c61d0845	884	sc->sc_state = PPPOE_STATE_INITIAL;
dcoban	0:1a61c61d0845	885	}
dcoban	0:1a61c61d0845	886
dcoban	0:1a61c61d0845	887	/* Send a PADR packet */
dcoban	0:1a61c61d0845	888	static err_t
dcoban	0:1a61c61d0845	889	pppoe_send_padr(struct pppoe_softc *sc)
dcoban	0:1a61c61d0845	890	{
dcoban	0:1a61c61d0845	891	struct pbuf *pb;
dcoban	0:1a61c61d0845	892	u8_t *p;
dcoban	0:1a61c61d0845	893	size_t len;
dcoban	0:1a61c61d0845	894	#ifdef PPPOE_TODO
dcoban	0:1a61c61d0845	895	size_t l1 = 0; /* XXX: gcc */
dcoban	0:1a61c61d0845	896	#endif /* PPPOE_TODO */
dcoban	0:1a61c61d0845	897
dcoban	0:1a61c61d0845	898	if (sc->sc_state != PPPOE_STATE_PADR_SENT) {
dcoban	0:1a61c61d0845	899	return ERR_CONN;
dcoban	0:1a61c61d0845	900	}
dcoban	0:1a61c61d0845	901
dcoban	0:1a61c61d0845	902	len = 2 + 2 + 2 + 2 + sizeof(sc); /* service name, host unique */
dcoban	0:1a61c61d0845	903	#ifdef PPPOE_TODO
dcoban	0:1a61c61d0845	904	if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
dcoban	0:1a61c61d0845	905	l1 = strlen(sc->sc_service_name);
dcoban	0:1a61c61d0845	906	len += l1;
dcoban	0:1a61c61d0845	907	}
dcoban	0:1a61c61d0845	908	#endif /* PPPOE_TODO */
dcoban	0:1a61c61d0845	909	if (sc->sc_ac_cookie_len > 0) {
dcoban	0:1a61c61d0845	910	len += 2 + 2 + sc->sc_ac_cookie_len; /* AC cookie */
dcoban	0:1a61c61d0845	911	}
dcoban	0:1a61c61d0845	912	LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
dcoban	0:1a61c61d0845	913	sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
dcoban	0:1a61c61d0845	914	pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
dcoban	0:1a61c61d0845	915	if (!pb) {
dcoban	0:1a61c61d0845	916	return ERR_MEM;
dcoban	0:1a61c61d0845	917	}
dcoban	0:1a61c61d0845	918	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
dcoban	0:1a61c61d0845	919	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
dcoban	0:1a61c61d0845	920	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADR, 0, len);
dcoban	0:1a61c61d0845	921	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
dcoban	0:1a61c61d0845	922	#ifdef PPPOE_TODO
dcoban	0:1a61c61d0845	923	if (sc->sc_service_name != NULL) {
dcoban	0:1a61c61d0845	924	PPPOE_ADD_16(p, l1);
dcoban	0:1a61c61d0845	925	MEMCPY(p, sc->sc_service_name, l1);
dcoban	0:1a61c61d0845	926	p += l1;
dcoban	0:1a61c61d0845	927	} else
dcoban	0:1a61c61d0845	928	#endif /* PPPOE_TODO */
dcoban	0:1a61c61d0845	929	{
dcoban	0:1a61c61d0845	930	PPPOE_ADD_16(p, 0);
dcoban	0:1a61c61d0845	931	}
dcoban	0:1a61c61d0845	932	if (sc->sc_ac_cookie_len > 0) {
dcoban	0:1a61c61d0845	933	PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
dcoban	0:1a61c61d0845	934	PPPOE_ADD_16(p, sc->sc_ac_cookie_len);
dcoban	0:1a61c61d0845	935	MEMCPY(p, sc->sc_ac_cookie, sc->sc_ac_cookie_len);
dcoban	0:1a61c61d0845	936	p += sc->sc_ac_cookie_len;
dcoban	0:1a61c61d0845	937	}
dcoban	0:1a61c61d0845	938	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
dcoban	0:1a61c61d0845	939	PPPOE_ADD_16(p, sizeof(sc));
dcoban	0:1a61c61d0845	940	MEMCPY(p, &sc, sizeof sc);
dcoban	0:1a61c61d0845	941
dcoban	0:1a61c61d0845	942	return pppoe_output(sc, pb);
dcoban	0:1a61c61d0845	943	}
dcoban	0:1a61c61d0845	944
dcoban	0:1a61c61d0845	945	/* send a PADT packet */
dcoban	0:1a61c61d0845	946	static err_t
dcoban	0:1a61c61d0845	947	pppoe_send_padt(struct netif outgoing_if, u_int session, const u8_t dest)
dcoban	0:1a61c61d0845	948	{
dcoban	0:1a61c61d0845	949	struct pbuf *pb;
dcoban	0:1a61c61d0845	950	struct eth_hdr *ethhdr;
dcoban	0:1a61c61d0845	951	err_t res;
dcoban	0:1a61c61d0845	952	u8_t *p;
dcoban	0:1a61c61d0845	953
dcoban	0:1a61c61d0845	954	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN, PBUF_RAM);
dcoban	0:1a61c61d0845	955	if (!pb) {
dcoban	0:1a61c61d0845	956	return ERR_MEM;
dcoban	0:1a61c61d0845	957	}
dcoban	0:1a61c61d0845	958	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
dcoban	0:1a61c61d0845	959
dcoban	0:1a61c61d0845	960	ethhdr = (struct eth_hdr *)pb->payload;
dcoban	0:1a61c61d0845	961	ethhdr->type = PP_HTONS(ETHTYPE_PPPOEDISC);
dcoban	0:1a61c61d0845	962	MEMCPY(ethhdr->dest.addr, dest, sizeof(ethhdr->dest.addr));
dcoban	0:1a61c61d0845	963	MEMCPY(ethhdr->src.addr, ((struct eth_addr *)outgoing_if->hwaddr)->addr, sizeof(ethhdr->src.addr));
dcoban	0:1a61c61d0845	964
dcoban	0:1a61c61d0845	965	p = (u8_t*)(ethhdr + 1);
dcoban	0:1a61c61d0845	966	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADT, session, 0);
dcoban	0:1a61c61d0845	967
dcoban	0:1a61c61d0845	968	res = outgoing_if->linkoutput(outgoing_if, pb);
dcoban	0:1a61c61d0845	969
dcoban	0:1a61c61d0845	970	pbuf_free(pb);
dcoban	0:1a61c61d0845	971
dcoban	0:1a61c61d0845	972	return res;
dcoban	0:1a61c61d0845	973	}
dcoban	0:1a61c61d0845	974
dcoban	0:1a61c61d0845	975	#ifdef PPPOE_SERVER
dcoban	0:1a61c61d0845	976	static err_t
dcoban	0:1a61c61d0845	977	pppoe_send_pado(struct pppoe_softc *sc)
dcoban	0:1a61c61d0845	978	{
dcoban	0:1a61c61d0845	979	struct pbuf *pb;
dcoban	0:1a61c61d0845	980	u8_t *p;
dcoban	0:1a61c61d0845	981	size_t len;
dcoban	0:1a61c61d0845	982
dcoban	0:1a61c61d0845	983	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
dcoban	0:1a61c61d0845	984	return ERR_CONN;
dcoban	0:1a61c61d0845	985	}
dcoban	0:1a61c61d0845	986
dcoban	0:1a61c61d0845	987	/* calc length */
dcoban	0:1a61c61d0845	988	len = 0;
dcoban	0:1a61c61d0845	989	/* include ac_cookie */
dcoban	0:1a61c61d0845	990	len += 2 + 2 + sizeof(sc);
dcoban	0:1a61c61d0845	991	/* include hunique */
dcoban	0:1a61c61d0845	992	len += 2 + 2 + sc->sc_hunique_len;
dcoban	0:1a61c61d0845	993	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
dcoban	0:1a61c61d0845	994	if (!pb) {
dcoban	0:1a61c61d0845	995	return ERR_MEM;
dcoban	0:1a61c61d0845	996	}
dcoban	0:1a61c61d0845	997	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
dcoban	0:1a61c61d0845	998	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
dcoban	0:1a61c61d0845	999	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADO, 0, len);
dcoban	0:1a61c61d0845	1000	PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
dcoban	0:1a61c61d0845	1001	PPPOE_ADD_16(p, sizeof(sc));
dcoban	0:1a61c61d0845	1002	MEMCPY(p, &sc, sizeof(sc));
dcoban	0:1a61c61d0845	1003	p += sizeof(sc);
dcoban	0:1a61c61d0845	1004	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
dcoban	0:1a61c61d0845	1005	PPPOE_ADD_16(p, sc->sc_hunique_len);
dcoban	0:1a61c61d0845	1006	MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
dcoban	0:1a61c61d0845	1007	return pppoe_output(sc, pb);
dcoban	0:1a61c61d0845	1008	}
dcoban	0:1a61c61d0845	1009
dcoban	0:1a61c61d0845	1010	static err_t
dcoban	0:1a61c61d0845	1011	pppoe_send_pads(struct pppoe_softc *sc)
dcoban	0:1a61c61d0845	1012	{
dcoban	0:1a61c61d0845	1013	struct pbuf *pb;
dcoban	0:1a61c61d0845	1014	u8_t *p;
dcoban	0:1a61c61d0845	1015	size_t len, l1 = 0; /* XXX: gcc */
dcoban	0:1a61c61d0845	1016
dcoban	0:1a61c61d0845	1017	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
dcoban	0:1a61c61d0845	1018	return ERR_CONN;
dcoban	0:1a61c61d0845	1019	}
dcoban	0:1a61c61d0845	1020
dcoban	0:1a61c61d0845	1021	sc->sc_session = mono_time.tv_sec % 0xff + 1;
dcoban	0:1a61c61d0845	1022	/* calc length */
dcoban	0:1a61c61d0845	1023	len = 0;
dcoban	0:1a61c61d0845	1024	/* include hunique */
dcoban	0:1a61c61d0845	1025	len += 2 + 2 + 2 + 2 + sc->sc_hunique_len; /* service name, host unique*/
dcoban	0:1a61c61d0845	1026	if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
dcoban	0:1a61c61d0845	1027	l1 = strlen(sc->sc_service_name);
dcoban	0:1a61c61d0845	1028	len += l1;
dcoban	0:1a61c61d0845	1029	}
dcoban	0:1a61c61d0845	1030	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
dcoban	0:1a61c61d0845	1031	if (!pb) {
dcoban	0:1a61c61d0845	1032	return ERR_MEM;
dcoban	0:1a61c61d0845	1033	}
dcoban	0:1a61c61d0845	1034	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
dcoban	0:1a61c61d0845	1035	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
dcoban	0:1a61c61d0845	1036	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADS, sc->sc_session, len);
dcoban	0:1a61c61d0845	1037	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
dcoban	0:1a61c61d0845	1038	if (sc->sc_service_name != NULL) {
dcoban	0:1a61c61d0845	1039	PPPOE_ADD_16(p, l1);
dcoban	0:1a61c61d0845	1040	MEMCPY(p, sc->sc_service_name, l1);
dcoban	0:1a61c61d0845	1041	p += l1;
dcoban	0:1a61c61d0845	1042	} else {
dcoban	0:1a61c61d0845	1043	PPPOE_ADD_16(p, 0);
dcoban	0:1a61c61d0845	1044	}
dcoban	0:1a61c61d0845	1045	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
dcoban	0:1a61c61d0845	1046	PPPOE_ADD_16(p, sc->sc_hunique_len);
dcoban	0:1a61c61d0845	1047	MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
dcoban	0:1a61c61d0845	1048	return pppoe_output(sc, pb);
dcoban	0:1a61c61d0845	1049	}
dcoban	0:1a61c61d0845	1050	#endif
dcoban	0:1a61c61d0845	1051
dcoban	0:1a61c61d0845	1052	err_t
dcoban	0:1a61c61d0845	1053	pppoe_xmit(struct pppoe_softc sc, struct pbuf pb)
dcoban	0:1a61c61d0845	1054	{
dcoban	0:1a61c61d0845	1055	u8_t *p;
dcoban	0:1a61c61d0845	1056	size_t len;
dcoban	0:1a61c61d0845	1057
dcoban	0:1a61c61d0845	1058	/* are we ready to process data yet? */
dcoban	0:1a61c61d0845	1059	if (sc->sc_state < PPPOE_STATE_SESSION) {
dcoban	0:1a61c61d0845	1060	/sppp_flush(&sc->sc_sppp.pp_if);/
dcoban	0:1a61c61d0845	1061	pbuf_free(pb);
dcoban	0:1a61c61d0845	1062	return ERR_CONN;
dcoban	0:1a61c61d0845	1063	}
dcoban	0:1a61c61d0845	1064
dcoban	0:1a61c61d0845	1065	len = pb->tot_len;
dcoban	0:1a61c61d0845	1066
dcoban	0:1a61c61d0845	1067	/* make room for Ethernet header - should not fail */
dcoban	0:1a61c61d0845	1068	if (pbuf_header(pb, sizeof(struct eth_hdr) + PPPOE_HEADERLEN) != 0) {
dcoban	0:1a61c61d0845	1069	/* bail out */
dcoban	0:1a61c61d0845	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));
dcoban	0:1a61c61d0845	1071	LINK_STATS_INC(link.lenerr);
dcoban	0:1a61c61d0845	1072	pbuf_free(pb);
dcoban	0:1a61c61d0845	1073	return ERR_BUF;
dcoban	0:1a61c61d0845	1074	}
dcoban	0:1a61c61d0845	1075
dcoban	0:1a61c61d0845	1076	p = (u8_t*)pb->payload + sizeof(struct eth_hdr);
dcoban	0:1a61c61d0845	1077	PPPOE_ADD_HEADER(p, 0, sc->sc_session, len);
dcoban	0:1a61c61d0845	1078
dcoban	0:1a61c61d0845	1079	return pppoe_output(sc, pb);
dcoban	0:1a61c61d0845	1080	}
dcoban	0:1a61c61d0845	1081
dcoban	0:1a61c61d0845	1082	#if 0 /def PFIL_HOOKS/
dcoban	0:1a61c61d0845	1083	static int
dcoban	0:1a61c61d0845	1084	pppoe_ifattach_hook(void arg, struct pbuf mp, struct netif ifp, int dir)
dcoban	0:1a61c61d0845	1085	{
dcoban	0:1a61c61d0845	1086	struct pppoe_softc *sc;
dcoban	0:1a61c61d0845	1087	int s;
dcoban	0:1a61c61d0845	1088
dcoban	0:1a61c61d0845	1089	if (mp != (struct pbuf **)PFIL_IFNET_DETACH) {
dcoban	0:1a61c61d0845	1090	return 0;
dcoban	0:1a61c61d0845	1091	}
dcoban	0:1a61c61d0845	1092
dcoban	0:1a61c61d0845	1093	LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
dcoban	0:1a61c61d0845	1094	if (sc->sc_ethif != ifp) {
dcoban	0:1a61c61d0845	1095	continue;
dcoban	0:1a61c61d0845	1096	}
dcoban	0:1a61c61d0845	1097	if (sc->sc_sppp.pp_if.if_flags & IFF_UP) {
dcoban	0:1a61c61d0845	1098	sc->sc_sppp.pp_if.if_flags &= ~(IFF_UP\|IFF_RUNNING);
dcoban	0:1a61c61d0845	1099	printf("%c%c%"U16_F": ethernet interface detached, going down\n",
dcoban	0:1a61c61d0845	1100	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
dcoban	0:1a61c61d0845	1101	}
dcoban	0:1a61c61d0845	1102	sc->sc_ethif = NULL;
dcoban	0:1a61c61d0845	1103	pppoe_clear_softc(sc, "ethernet interface detached");
dcoban	0:1a61c61d0845	1104	}
dcoban	0:1a61c61d0845	1105
dcoban	0:1a61c61d0845	1106	return 0;
dcoban	0:1a61c61d0845	1107	}
dcoban	0:1a61c61d0845	1108	#endif
dcoban	0:1a61c61d0845	1109
dcoban	0:1a61c61d0845	1110	static void
dcoban	0:1a61c61d0845	1111	pppoe_clear_softc(struct pppoe_softc sc, const char message)
dcoban	0:1a61c61d0845	1112	{
dcoban	0:1a61c61d0845	1113	LWIP_UNUSED_ARG(message);
dcoban	0:1a61c61d0845	1114
dcoban	0:1a61c61d0845	1115	/* stop timer */
dcoban	0:1a61c61d0845	1116	sys_untimeout(pppoe_timeout, sc);
dcoban	0:1a61c61d0845	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));
dcoban	0:1a61c61d0845	1118
dcoban	0:1a61c61d0845	1119	/* fix our state */
dcoban	0:1a61c61d0845	1120	sc->sc_state = PPPOE_STATE_INITIAL;
dcoban	0:1a61c61d0845	1121
dcoban	0:1a61c61d0845	1122	/* notify upper layers */
dcoban	0:1a61c61d0845	1123	sc->sc_linkStatusCB(sc->sc_pd, 0);
dcoban	0:1a61c61d0845	1124
dcoban	0:1a61c61d0845	1125	/* clean up softc */
dcoban	0:1a61c61d0845	1126	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
dcoban	0:1a61c61d0845	1127	sc->sc_ac_cookie_len = 0;
dcoban	0:1a61c61d0845	1128	sc->sc_session = 0;
dcoban	0:1a61c61d0845	1129	}
dcoban	0:1a61c61d0845	1130
dcoban	0:1a61c61d0845	1131	#endif /* PPPOE_SUPPORT */
dcoban	0:1a61c61d0845	1132

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	03 Apr 2012
Imports:	2
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	4
Followers:	1

NetStack/lwip/netif/ppp/ppp_oe.c@0:1a61c61d0845, 2012-04-03 (annotated)

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