NetServicesSource - Experimental HTTPClient with proxy support

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Experimental HTTPClient with proxy support

lwip/netif/ppp/ppp_oe.c@0:b56b6a05cad4, 2011-06-29 (annotated)

Committer:: igorsk
Date:: Wed Jun 29 16:01:58 2011 +0000
Revision:: 0:b56b6a05cad4

Who changed what in which revision?

User	Revision	Line number	New contents of line
igorsk	0:b56b6a05cad4	1	/*****************************************************************************
igorsk	0:b56b6a05cad4	2	* ppp_oe.c - PPP Over Ethernet implementation for lwIP.
igorsk	0:b56b6a05cad4	3	*
igorsk	0:b56b6a05cad4	4	* Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc.
igorsk	0:b56b6a05cad4	5	*
igorsk	0:b56b6a05cad4	6	* The authors hereby grant permission to use, copy, modify, distribute,
igorsk	0:b56b6a05cad4	7	* and license this software and its documentation for any purpose, provided
igorsk	0:b56b6a05cad4	8	* that existing copyright notices are retained in all copies and that this
igorsk	0:b56b6a05cad4	9	* notice and the following disclaimer are included verbatim in any
igorsk	0:b56b6a05cad4	10	* distributions. No written agreement, license, or royalty fee is required
igorsk	0:b56b6a05cad4	11	* for any of the authorized uses.
igorsk	0:b56b6a05cad4	12	*
igorsk	0:b56b6a05cad4	13	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
igorsk	0:b56b6a05cad4	14	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
igorsk	0:b56b6a05cad4	15	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
igorsk	0:b56b6a05cad4	16	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
igorsk	0:b56b6a05cad4	17	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
igorsk	0:b56b6a05cad4	18	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
igorsk	0:b56b6a05cad4	19	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
igorsk	0:b56b6a05cad4	20	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
igorsk	0:b56b6a05cad4	21	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
igorsk	0:b56b6a05cad4	22	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
igorsk	0:b56b6a05cad4	23	*
igorsk	0:b56b6a05cad4	24	******************************************************************************
igorsk	0:b56b6a05cad4	25	* REVISION HISTORY
igorsk	0:b56b6a05cad4	26	*
igorsk	0:b56b6a05cad4	27	* 06-01-01 Marc Boucher <marc@mbsi.ca>
igorsk	0:b56b6a05cad4	28	* Ported to lwIP.
igorsk	0:b56b6a05cad4	29	*****************************************************************************/
igorsk	0:b56b6a05cad4	30
igorsk	0:b56b6a05cad4	31
igorsk	0:b56b6a05cad4	32
igorsk	0:b56b6a05cad4	33	/* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */
igorsk	0:b56b6a05cad4	34
igorsk	0:b56b6a05cad4	35	/*-
igorsk	0:b56b6a05cad4	36	* Copyright (c) 2002 The NetBSD Foundation, Inc.
igorsk	0:b56b6a05cad4	37	* All rights reserved.
igorsk	0:b56b6a05cad4	38	*
igorsk	0:b56b6a05cad4	39	* This code is derived from software contributed to The NetBSD Foundation
igorsk	0:b56b6a05cad4	40	* by Martin Husemann <martin@NetBSD.org>.
igorsk	0:b56b6a05cad4	41	*
igorsk	0:b56b6a05cad4	42	* Redistribution and use in source and binary forms, with or without
igorsk	0:b56b6a05cad4	43	* modification, are permitted provided that the following conditions
igorsk	0:b56b6a05cad4	44	* are met:
igorsk	0:b56b6a05cad4	45	* 1. Redistributions of source code must retain the above copyright
igorsk	0:b56b6a05cad4	46	* notice, this list of conditions and the following disclaimer.
igorsk	0:b56b6a05cad4	47	* 2. Redistributions in binary form must reproduce the above copyright
igorsk	0:b56b6a05cad4	48	* notice, this list of conditions and the following disclaimer in the
igorsk	0:b56b6a05cad4	49	* documentation and/or other materials provided with the distribution.
igorsk	0:b56b6a05cad4	50	* 3. All advertising materials mentioning features or use of this software
igorsk	0:b56b6a05cad4	51	* must display the following acknowledgement:
igorsk	0:b56b6a05cad4	52	* This product includes software developed by the NetBSD
igorsk	0:b56b6a05cad4	53	* Foundation, Inc. and its contributors.
igorsk	0:b56b6a05cad4	54	* 4. Neither the name of The NetBSD Foundation nor the names of its
igorsk	0:b56b6a05cad4	55	* contributors may be used to endorse or promote products derived
igorsk	0:b56b6a05cad4	56	* from this software without specific prior written permission.
igorsk	0:b56b6a05cad4	57	*
igorsk	0:b56b6a05cad4	58	* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
igorsk	0:b56b6a05cad4	59	* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
igorsk	0:b56b6a05cad4	60	* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
igorsk	0:b56b6a05cad4	61	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
igorsk	0:b56b6a05cad4	62	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
igorsk	0:b56b6a05cad4	63	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
igorsk	0:b56b6a05cad4	64	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
igorsk	0:b56b6a05cad4	65	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
igorsk	0:b56b6a05cad4	66	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
igorsk	0:b56b6a05cad4	67	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
igorsk	0:b56b6a05cad4	68	* POSSIBILITY OF SUCH DAMAGE.
igorsk	0:b56b6a05cad4	69	*/
igorsk	0:b56b6a05cad4	70
igorsk	0:b56b6a05cad4	71	#include "lwip/opt.h"
igorsk	0:b56b6a05cad4	72
igorsk	0:b56b6a05cad4	73	#if PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */
igorsk	0:b56b6a05cad4	74
igorsk	0:b56b6a05cad4	75	#include "netif/ppp_oe.h"
igorsk	0:b56b6a05cad4	76
igorsk	0:b56b6a05cad4	77	#include "ppp.h"
igorsk	0:b56b6a05cad4	78	#include "pppdebug.h"
igorsk	0:b56b6a05cad4	79
igorsk	0:b56b6a05cad4	80	#include "lwip/timers.h"
igorsk	0:b56b6a05cad4	81	#include "lwip/memp.h"
igorsk	0:b56b6a05cad4	82
igorsk	0:b56b6a05cad4	83	#include <string.h>
igorsk	0:b56b6a05cad4	84	#include <stdio.h>
igorsk	0:b56b6a05cad4	85
igorsk	0:b56b6a05cad4	86
igorsk	0:b56b6a05cad4	87	/* Add a 16 bit unsigned value to a buffer pointed to by PTR */
igorsk	0:b56b6a05cad4	88	#define PPPOE_ADD_16(PTR, VAL) \
igorsk	0:b56b6a05cad4	89	*(PTR)++ = (u8_t)((VAL) / 256); \
igorsk	0:b56b6a05cad4	90	*(PTR)++ = (u8_t)((VAL) % 256)
igorsk	0:b56b6a05cad4	91
igorsk	0:b56b6a05cad4	92	/* Add a complete PPPoE header to the buffer pointed to by PTR */
igorsk	0:b56b6a05cad4	93	#define PPPOE_ADD_HEADER(PTR, CODE, SESS, LEN) \
igorsk	0:b56b6a05cad4	94	*(PTR)++ = PPPOE_VERTYPE; \
igorsk	0:b56b6a05cad4	95	*(PTR)++ = (CODE); \
igorsk	0:b56b6a05cad4	96	PPPOE_ADD_16(PTR, SESS); \
igorsk	0:b56b6a05cad4	97	PPPOE_ADD_16(PTR, LEN)
igorsk	0:b56b6a05cad4	98
igorsk	0:b56b6a05cad4	99	#define PPPOE_DISC_TIMEOUT (51000) / base for quick timeout calculation */
igorsk	0:b56b6a05cad4	100	#define PPPOE_SLOW_RETRY (601000) / persistent retry interval */
igorsk	0:b56b6a05cad4	101	#define PPPOE_DISC_MAXPADI 4 /* retry PADI four times (quickly) */
igorsk	0:b56b6a05cad4	102	#define PPPOE_DISC_MAXPADR 2 /* retry PADR twice */
igorsk	0:b56b6a05cad4	103
igorsk	0:b56b6a05cad4	104	#ifdef PPPOE_SERVER
igorsk	0:b56b6a05cad4	105	#error "PPPOE_SERVER is not yet supported under lwIP!"
igorsk	0:b56b6a05cad4	106	/* from if_spppsubr.c */
igorsk	0:b56b6a05cad4	107	#define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
igorsk	0:b56b6a05cad4	108	#endif
igorsk	0:b56b6a05cad4	109
igorsk	0:b56b6a05cad4	110	#ifndef PPPOE_ERRORSTRING_LEN
igorsk	0:b56b6a05cad4	111	#define PPPOE_ERRORSTRING_LEN 64
igorsk	0:b56b6a05cad4	112	#endif
igorsk	0:b56b6a05cad4	113	static char pppoe_error_tmp[PPPOE_ERRORSTRING_LEN];
igorsk	0:b56b6a05cad4	114
igorsk	0:b56b6a05cad4	115
igorsk	0:b56b6a05cad4	116	/* input routines */
igorsk	0:b56b6a05cad4	117	static void pppoe_dispatch_disc_pkt(struct netif , struct pbuf );
igorsk	0:b56b6a05cad4	118
igorsk	0:b56b6a05cad4	119	/* management routines */
igorsk	0:b56b6a05cad4	120	static int pppoe_do_disconnect(struct pppoe_softc *);
igorsk	0:b56b6a05cad4	121	static void pppoe_abort_connect(struct pppoe_softc *);
igorsk	0:b56b6a05cad4	122	static void pppoe_clear_softc(struct pppoe_softc , const char );
igorsk	0:b56b6a05cad4	123
igorsk	0:b56b6a05cad4	124	/* internal timeout handling */
igorsk	0:b56b6a05cad4	125	static void pppoe_timeout(void *);
igorsk	0:b56b6a05cad4	126
igorsk	0:b56b6a05cad4	127	/* sending actual protocol controll packets */
igorsk	0:b56b6a05cad4	128	static err_t pppoe_send_padi(struct pppoe_softc *);
igorsk	0:b56b6a05cad4	129	static err_t pppoe_send_padr(struct pppoe_softc *);
igorsk	0:b56b6a05cad4	130	#ifdef PPPOE_SERVER
igorsk	0:b56b6a05cad4	131	static err_t pppoe_send_pado(struct pppoe_softc *);
igorsk	0:b56b6a05cad4	132	static err_t pppoe_send_pads(struct pppoe_softc *);
igorsk	0:b56b6a05cad4	133	#endif
igorsk	0:b56b6a05cad4	134	static err_t pppoe_send_padt(struct netif , u_int, const u8_t );
igorsk	0:b56b6a05cad4	135
igorsk	0:b56b6a05cad4	136	/* internal helper functions */
igorsk	0:b56b6a05cad4	137	static struct pppoe_softc * pppoe_find_softc_by_session(u_int, struct netif *);
igorsk	0:b56b6a05cad4	138	static struct pppoe_softc * pppoe_find_softc_by_hunique(u8_t , size_t, struct netif );
igorsk	0:b56b6a05cad4	139
igorsk	0:b56b6a05cad4	140	/** linked list of created pppoe interfaces */
igorsk	0:b56b6a05cad4	141	static struct pppoe_softc *pppoe_softc_list;
igorsk	0:b56b6a05cad4	142
igorsk	0:b56b6a05cad4	143	err_t
igorsk	0:b56b6a05cad4	144	pppoe_create(struct netif ethif, int pd, void (linkStatusCB)(int pd, int up), struct pppoe_softc **scptr)
igorsk	0:b56b6a05cad4	145	{
igorsk	0:b56b6a05cad4	146	struct pppoe_softc *sc;
igorsk	0:b56b6a05cad4	147
igorsk	0:b56b6a05cad4	148	sc = (struct pppoe_softc *)memp_malloc(MEMP_PPPOE_IF);
igorsk	0:b56b6a05cad4	149	if (sc == NULL) {
igorsk	0:b56b6a05cad4	150	*scptr = NULL;
igorsk	0:b56b6a05cad4	151	return ERR_MEM;
igorsk	0:b56b6a05cad4	152	}
igorsk	0:b56b6a05cad4	153	memset(sc, 0, sizeof(struct pppoe_softc));
igorsk	0:b56b6a05cad4	154
igorsk	0:b56b6a05cad4	155	/* changed to real address later */
igorsk	0:b56b6a05cad4	156	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
igorsk	0:b56b6a05cad4	157
igorsk	0:b56b6a05cad4	158	sc->sc_pd = pd;
igorsk	0:b56b6a05cad4	159	sc->sc_linkStatusCB = linkStatusCB;
igorsk	0:b56b6a05cad4	160	sc->sc_ethif = ethif;
igorsk	0:b56b6a05cad4	161
igorsk	0:b56b6a05cad4	162	/* put the new interface at the head of the list */
igorsk	0:b56b6a05cad4	163	sc->next = pppoe_softc_list;
igorsk	0:b56b6a05cad4	164	pppoe_softc_list = sc;
igorsk	0:b56b6a05cad4	165
igorsk	0:b56b6a05cad4	166	*scptr = sc;
igorsk	0:b56b6a05cad4	167
igorsk	0:b56b6a05cad4	168	return ERR_OK;
igorsk	0:b56b6a05cad4	169	}
igorsk	0:b56b6a05cad4	170
igorsk	0:b56b6a05cad4	171	err_t
igorsk	0:b56b6a05cad4	172	pppoe_destroy(struct netif *ifp)
igorsk	0:b56b6a05cad4	173	{
igorsk	0:b56b6a05cad4	174	struct pppoe_softc sc, prev = NULL;
igorsk	0:b56b6a05cad4	175
igorsk	0:b56b6a05cad4	176	for (sc = pppoe_softc_list; sc != NULL; prev = sc, sc = sc->next) {
igorsk	0:b56b6a05cad4	177	if (sc->sc_ethif == ifp) {
igorsk	0:b56b6a05cad4	178	break;
igorsk	0:b56b6a05cad4	179	}
igorsk	0:b56b6a05cad4	180	}
igorsk	0:b56b6a05cad4	181
igorsk	0:b56b6a05cad4	182	if(!(sc && (sc->sc_ethif == ifp))) {
igorsk	0:b56b6a05cad4	183	return ERR_IF;
igorsk	0:b56b6a05cad4	184	}
igorsk	0:b56b6a05cad4	185
igorsk	0:b56b6a05cad4	186	sys_untimeout(pppoe_timeout, sc);
igorsk	0:b56b6a05cad4	187	if (prev == NULL) {
igorsk	0:b56b6a05cad4	188	/* remove sc from the head of the list */
igorsk	0:b56b6a05cad4	189	pppoe_softc_list = sc->next;
igorsk	0:b56b6a05cad4	190	} else {
igorsk	0:b56b6a05cad4	191	/* remove sc from the list */
igorsk	0:b56b6a05cad4	192	prev->next = sc->next;
igorsk	0:b56b6a05cad4	193	}
igorsk	0:b56b6a05cad4	194
igorsk	0:b56b6a05cad4	195	#ifdef PPPOE_TODO
igorsk	0:b56b6a05cad4	196	if (sc->sc_concentrator_name) {
igorsk	0:b56b6a05cad4	197	mem_free(sc->sc_concentrator_name);
igorsk	0:b56b6a05cad4	198	}
igorsk	0:b56b6a05cad4	199	if (sc->sc_service_name) {
igorsk	0:b56b6a05cad4	200	mem_free(sc->sc_service_name);
igorsk	0:b56b6a05cad4	201	}
igorsk	0:b56b6a05cad4	202	#endif /* PPPOE_TODO */
igorsk	0:b56b6a05cad4	203	memp_free(MEMP_PPPOE_IF, sc);
igorsk	0:b56b6a05cad4	204
igorsk	0:b56b6a05cad4	205	return ERR_OK;
igorsk	0:b56b6a05cad4	206	}
igorsk	0:b56b6a05cad4	207
igorsk	0:b56b6a05cad4	208	/*
igorsk	0:b56b6a05cad4	209	* Find the interface handling the specified session.
igorsk	0:b56b6a05cad4	210	* Note: O(number of sessions open), this is a client-side only, mean
igorsk	0:b56b6a05cad4	211	* and lean implementation, so number of open sessions typically should
igorsk	0:b56b6a05cad4	212	* be 1.
igorsk	0:b56b6a05cad4	213	*/
igorsk	0:b56b6a05cad4	214	static struct pppoe_softc *
igorsk	0:b56b6a05cad4	215	pppoe_find_softc_by_session(u_int session, struct netif *rcvif)
igorsk	0:b56b6a05cad4	216	{
igorsk	0:b56b6a05cad4	217	struct pppoe_softc *sc;
igorsk	0:b56b6a05cad4	218
igorsk	0:b56b6a05cad4	219	if (session == 0) {
igorsk	0:b56b6a05cad4	220	return NULL;
igorsk	0:b56b6a05cad4	221	}
igorsk	0:b56b6a05cad4	222
igorsk	0:b56b6a05cad4	223	for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
igorsk	0:b56b6a05cad4	224	if (sc->sc_state == PPPOE_STATE_SESSION
igorsk	0:b56b6a05cad4	225	&& sc->sc_session == session) {
igorsk	0:b56b6a05cad4	226	if (sc->sc_ethif == rcvif) {
igorsk	0:b56b6a05cad4	227	return sc;
igorsk	0:b56b6a05cad4	228	} else {
igorsk	0:b56b6a05cad4	229	return NULL;
igorsk	0:b56b6a05cad4	230	}
igorsk	0:b56b6a05cad4	231	}
igorsk	0:b56b6a05cad4	232	}
igorsk	0:b56b6a05cad4	233	return NULL;
igorsk	0:b56b6a05cad4	234	}
igorsk	0:b56b6a05cad4	235
igorsk	0:b56b6a05cad4	236	/* Check host unique token passed and return appropriate softc pointer,
igorsk	0:b56b6a05cad4	237	* or NULL if token is bogus. */
igorsk	0:b56b6a05cad4	238	static struct pppoe_softc *
igorsk	0:b56b6a05cad4	239	pppoe_find_softc_by_hunique(u8_t token, size_t len, struct netif rcvif)
igorsk	0:b56b6a05cad4	240	{
igorsk	0:b56b6a05cad4	241	struct pppoe_softc sc, t;
igorsk	0:b56b6a05cad4	242
igorsk	0:b56b6a05cad4	243	if (pppoe_softc_list == NULL) {
igorsk	0:b56b6a05cad4	244	return NULL;
igorsk	0:b56b6a05cad4	245	}
igorsk	0:b56b6a05cad4	246
igorsk	0:b56b6a05cad4	247	if (len != sizeof sc) {
igorsk	0:b56b6a05cad4	248	return NULL;
igorsk	0:b56b6a05cad4	249	}
igorsk	0:b56b6a05cad4	250	MEMCPY(&t, token, len);
igorsk	0:b56b6a05cad4	251
igorsk	0:b56b6a05cad4	252	for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
igorsk	0:b56b6a05cad4	253	if (sc == t) {
igorsk	0:b56b6a05cad4	254	break;
igorsk	0:b56b6a05cad4	255	}
igorsk	0:b56b6a05cad4	256	}
igorsk	0:b56b6a05cad4	257
igorsk	0:b56b6a05cad4	258	if (sc == NULL) {
igorsk	0:b56b6a05cad4	259	PPPDEBUG(LOG_DEBUG, ("pppoe: alien host unique tag, no session found\n"));
igorsk	0:b56b6a05cad4	260	return NULL;
igorsk	0:b56b6a05cad4	261	}
igorsk	0:b56b6a05cad4	262
igorsk	0:b56b6a05cad4	263	/* should be safe to access sc now /
igorsk	0:b56b6a05cad4	264	if (sc->sc_state < PPPOE_STATE_PADI_SENT \|\| sc->sc_state >= PPPOE_STATE_SESSION) {
igorsk	0:b56b6a05cad4	265	printf("%c%c%"U16_F": host unique tag found, but it belongs to a connection in state %d\n",
igorsk	0:b56b6a05cad4	266	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_state);
igorsk	0:b56b6a05cad4	267	return NULL;
igorsk	0:b56b6a05cad4	268	}
igorsk	0:b56b6a05cad4	269	if (sc->sc_ethif != rcvif) {
igorsk	0:b56b6a05cad4	270	printf("%c%c%"U16_F": wrong interface, not accepting host unique\n",
igorsk	0:b56b6a05cad4	271	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
igorsk	0:b56b6a05cad4	272	return NULL;
igorsk	0:b56b6a05cad4	273	}
igorsk	0:b56b6a05cad4	274	return sc;
igorsk	0:b56b6a05cad4	275	}
igorsk	0:b56b6a05cad4	276
igorsk	0:b56b6a05cad4	277	static void
igorsk	0:b56b6a05cad4	278	pppoe_linkstatus_up(struct pppoe_softc *sc)
igorsk	0:b56b6a05cad4	279	{
igorsk	0:b56b6a05cad4	280	sc->sc_linkStatusCB(sc->sc_pd, 1);
igorsk	0:b56b6a05cad4	281	}
igorsk	0:b56b6a05cad4	282
igorsk	0:b56b6a05cad4	283	/* analyze and handle a single received packet while not in session state */
igorsk	0:b56b6a05cad4	284	static void
igorsk	0:b56b6a05cad4	285	pppoe_dispatch_disc_pkt(struct netif netif, struct pbuf pb)
igorsk	0:b56b6a05cad4	286	{
igorsk	0:b56b6a05cad4	287	u16_t tag, len;
igorsk	0:b56b6a05cad4	288	u16_t session, plen;
igorsk	0:b56b6a05cad4	289	struct pppoe_softc *sc;
igorsk	0:b56b6a05cad4	290	const char *err_msg;
igorsk	0:b56b6a05cad4	291	char devname[6];
igorsk	0:b56b6a05cad4	292	u8_t *ac_cookie;
igorsk	0:b56b6a05cad4	293	u16_t ac_cookie_len;
igorsk	0:b56b6a05cad4	294	#ifdef PPPOE_SERVER
igorsk	0:b56b6a05cad4	295	u8_t *hunique;
igorsk	0:b56b6a05cad4	296	size_t hunique_len;
igorsk	0:b56b6a05cad4	297	#endif
igorsk	0:b56b6a05cad4	298	struct pppoehdr *ph;
igorsk	0:b56b6a05cad4	299	struct pppoetag pt;
igorsk	0:b56b6a05cad4	300	int off, err, errortag;
igorsk	0:b56b6a05cad4	301	struct eth_hdr *ethhdr;
igorsk	0:b56b6a05cad4	302
igorsk	0:b56b6a05cad4	303	pb = pppSingleBuf(pb);
igorsk	0:b56b6a05cad4	304
igorsk	0:b56b6a05cad4	305	strcpy(devname, "pppoe"); /* as long as we don't know which instance */
igorsk	0:b56b6a05cad4	306	err_msg = NULL;
igorsk	0:b56b6a05cad4	307	errortag = 0;
igorsk	0:b56b6a05cad4	308	if (pb->len < sizeof(*ethhdr)) {
igorsk	0:b56b6a05cad4	309	goto done;
igorsk	0:b56b6a05cad4	310	}
igorsk	0:b56b6a05cad4	311	ethhdr = (struct eth_hdr *)pb->payload;
igorsk	0:b56b6a05cad4	312	off = sizeof(*ethhdr);
igorsk	0:b56b6a05cad4	313
igorsk	0:b56b6a05cad4	314	ac_cookie = NULL;
igorsk	0:b56b6a05cad4	315	ac_cookie_len = 0;
igorsk	0:b56b6a05cad4	316	#ifdef PPPOE_SERVER
igorsk	0:b56b6a05cad4	317	hunique = NULL;
igorsk	0:b56b6a05cad4	318	hunique_len = 0;
igorsk	0:b56b6a05cad4	319	#endif
igorsk	0:b56b6a05cad4	320	session = 0;
igorsk	0:b56b6a05cad4	321	if (pb->len - off < PPPOE_HEADERLEN) {
igorsk	0:b56b6a05cad4	322	printf("pppoe: packet too short: %d\n", pb->len);
igorsk	0:b56b6a05cad4	323	goto done;
igorsk	0:b56b6a05cad4	324	}
igorsk	0:b56b6a05cad4	325
igorsk	0:b56b6a05cad4	326	ph = (struct pppoehdr *) (ethhdr + 1);
igorsk	0:b56b6a05cad4	327	if (ph->vertype != PPPOE_VERTYPE) {
igorsk	0:b56b6a05cad4	328	printf("pppoe: unknown version/type packet: 0x%x\n", ph->vertype);
igorsk	0:b56b6a05cad4	329	goto done;
igorsk	0:b56b6a05cad4	330	}
igorsk	0:b56b6a05cad4	331	session = ntohs(ph->session);
igorsk	0:b56b6a05cad4	332	plen = ntohs(ph->plen);
igorsk	0:b56b6a05cad4	333	off += sizeof(*ph);
igorsk	0:b56b6a05cad4	334
igorsk	0:b56b6a05cad4	335	if (plen + off > pb->len) {
igorsk	0:b56b6a05cad4	336	printf("pppoe: packet content does not fit: data available = %d, packet size = %u\n",
igorsk	0:b56b6a05cad4	337	pb->len - off, plen);
igorsk	0:b56b6a05cad4	338	goto done;
igorsk	0:b56b6a05cad4	339	}
igorsk	0:b56b6a05cad4	340	if(pb->tot_len == pb->len) {
igorsk	0:b56b6a05cad4	341	pb->tot_len = pb->len = (u16_t)off + plen; /* ignore trailing garbage */
igorsk	0:b56b6a05cad4	342	}
igorsk	0:b56b6a05cad4	343	tag = 0;
igorsk	0:b56b6a05cad4	344	len = 0;
igorsk	0:b56b6a05cad4	345	sc = NULL;
igorsk	0:b56b6a05cad4	346	while (off + sizeof(pt) <= pb->len) {
igorsk	0:b56b6a05cad4	347	MEMCPY(&pt, (u8_t*)pb->payload + off, sizeof(pt));
igorsk	0:b56b6a05cad4	348	tag = ntohs(pt.tag);
igorsk	0:b56b6a05cad4	349	len = ntohs(pt.len);
igorsk	0:b56b6a05cad4	350	if (off + sizeof(pt) + len > pb->len) {
igorsk	0:b56b6a05cad4	351	printf("pppoe: tag 0x%x len 0x%x is too long\n", tag, len);
igorsk	0:b56b6a05cad4	352	goto done;
igorsk	0:b56b6a05cad4	353	}
igorsk	0:b56b6a05cad4	354	switch (tag) {
igorsk	0:b56b6a05cad4	355	case PPPOE_TAG_EOL:
igorsk	0:b56b6a05cad4	356	goto breakbreak;
igorsk	0:b56b6a05cad4	357	case PPPOE_TAG_SNAME:
igorsk	0:b56b6a05cad4	358	break; /* ignored */
igorsk	0:b56b6a05cad4	359	case PPPOE_TAG_ACNAME:
igorsk	0:b56b6a05cad4	360	break; /* ignored */
igorsk	0:b56b6a05cad4	361	case PPPOE_TAG_HUNIQUE:
igorsk	0:b56b6a05cad4	362	if (sc != NULL) {
igorsk	0:b56b6a05cad4	363	break;
igorsk	0:b56b6a05cad4	364	}
igorsk	0:b56b6a05cad4	365	#ifdef PPPOE_SERVER
igorsk	0:b56b6a05cad4	366	hunique = (u8_t*)pb->payload + off + sizeof(pt);
igorsk	0:b56b6a05cad4	367	hunique_len = len;
igorsk	0:b56b6a05cad4	368	#endif
igorsk	0:b56b6a05cad4	369	sc = pppoe_find_softc_by_hunique((u8_t*)pb->payload + off + sizeof(pt), len, netif);
igorsk	0:b56b6a05cad4	370	if (sc != NULL) {
igorsk	0:b56b6a05cad4	371	snprintf(devname, sizeof(devname), "%c%c%"U16_F, sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
igorsk	0:b56b6a05cad4	372	}
igorsk	0:b56b6a05cad4	373	break;
igorsk	0:b56b6a05cad4	374	case PPPOE_TAG_ACCOOKIE:
igorsk	0:b56b6a05cad4	375	if (ac_cookie == NULL) {
igorsk	0:b56b6a05cad4	376	ac_cookie = (u8_t*)pb->payload + off + sizeof(pt);
igorsk	0:b56b6a05cad4	377	ac_cookie_len = len;
igorsk	0:b56b6a05cad4	378	}
igorsk	0:b56b6a05cad4	379	break;
igorsk	0:b56b6a05cad4	380	case PPPOE_TAG_SNAME_ERR:
igorsk	0:b56b6a05cad4	381	err_msg = "SERVICE NAME ERROR";
igorsk	0:b56b6a05cad4	382	errortag = 1;
igorsk	0:b56b6a05cad4	383	break;
igorsk	0:b56b6a05cad4	384	case PPPOE_TAG_ACSYS_ERR:
igorsk	0:b56b6a05cad4	385	err_msg = "AC SYSTEM ERROR";
igorsk	0:b56b6a05cad4	386	errortag = 1;
igorsk	0:b56b6a05cad4	387	break;
igorsk	0:b56b6a05cad4	388	case PPPOE_TAG_GENERIC_ERR:
igorsk	0:b56b6a05cad4	389	err_msg = "GENERIC ERROR";
igorsk	0:b56b6a05cad4	390	errortag = 1;
igorsk	0:b56b6a05cad4	391	break;
igorsk	0:b56b6a05cad4	392	}
igorsk	0:b56b6a05cad4	393	if (err_msg) {
igorsk	0:b56b6a05cad4	394	if (errortag && len) {
igorsk	0:b56b6a05cad4	395	u16_t error_len = LWIP_MIN(len, sizeof(pppoe_error_tmp)-1);
igorsk	0:b56b6a05cad4	396	strncpy(pppoe_error_tmp, (char*)pb->payload + off + sizeof(pt), error_len);
igorsk	0:b56b6a05cad4	397	pppoe_error_tmp[error_len-1] = '\0';
igorsk	0:b56b6a05cad4	398	printf("%s: %s: %s\n", devname, err_msg, pppoe_error_tmp);
igorsk	0:b56b6a05cad4	399	} else {
igorsk	0:b56b6a05cad4	400	printf("%s: %s\n", devname, err_msg);
igorsk	0:b56b6a05cad4	401	}
igorsk	0:b56b6a05cad4	402	if (errortag) {
igorsk	0:b56b6a05cad4	403	goto done;
igorsk	0:b56b6a05cad4	404	}
igorsk	0:b56b6a05cad4	405	}
igorsk	0:b56b6a05cad4	406	off += sizeof(pt) + len;
igorsk	0:b56b6a05cad4	407	}
igorsk	0:b56b6a05cad4	408
igorsk	0:b56b6a05cad4	409	breakbreak:;
igorsk	0:b56b6a05cad4	410	switch (ph->code) {
igorsk	0:b56b6a05cad4	411	case PPPOE_CODE_PADI:
igorsk	0:b56b6a05cad4	412	#ifdef PPPOE_SERVER
igorsk	0:b56b6a05cad4	413	/*
igorsk	0:b56b6a05cad4	414	* got service name, concentrator name, and/or host unique.
igorsk	0:b56b6a05cad4	415	* ignore if we have no interfaces with IFF_PASSIVE\|IFF_UP.
igorsk	0:b56b6a05cad4	416	*/
igorsk	0:b56b6a05cad4	417	if (LIST_EMPTY(&pppoe_softc_list)) {
igorsk	0:b56b6a05cad4	418	goto done;
igorsk	0:b56b6a05cad4	419	}
igorsk	0:b56b6a05cad4	420	LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
igorsk	0:b56b6a05cad4	421	if (!(sc->sc_sppp.pp_if.if_flags & IFF_UP)) {
igorsk	0:b56b6a05cad4	422	continue;
igorsk	0:b56b6a05cad4	423	}
igorsk	0:b56b6a05cad4	424	if (!(sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
igorsk	0:b56b6a05cad4	425	continue;
igorsk	0:b56b6a05cad4	426	}
igorsk	0:b56b6a05cad4	427	if (sc->sc_state == PPPOE_STATE_INITIAL) {
igorsk	0:b56b6a05cad4	428	break;
igorsk	0:b56b6a05cad4	429	}
igorsk	0:b56b6a05cad4	430	}
igorsk	0:b56b6a05cad4	431	if (sc == NULL) {
igorsk	0:b56b6a05cad4	432	/* printf("pppoe: free passive interface is not found\n"); */
igorsk	0:b56b6a05cad4	433	goto done;
igorsk	0:b56b6a05cad4	434	}
igorsk	0:b56b6a05cad4	435	if (hunique) {
igorsk	0:b56b6a05cad4	436	if (sc->sc_hunique) {
igorsk	0:b56b6a05cad4	437	mem_free(sc->sc_hunique);
igorsk	0:b56b6a05cad4	438	}
igorsk	0:b56b6a05cad4	439	sc->sc_hunique = mem_malloc(hunique_len);
igorsk	0:b56b6a05cad4	440	if (sc->sc_hunique == NULL) {
igorsk	0:b56b6a05cad4	441	goto done;
igorsk	0:b56b6a05cad4	442	}
igorsk	0:b56b6a05cad4	443	sc->sc_hunique_len = hunique_len;
igorsk	0:b56b6a05cad4	444	MEMCPY(sc->sc_hunique, hunique, hunique_len);
igorsk	0:b56b6a05cad4	445	}
igorsk	0:b56b6a05cad4	446	MEMCPY(&sc->sc_dest, eh->ether_shost, sizeof sc->sc_dest);
igorsk	0:b56b6a05cad4	447	sc->sc_state = PPPOE_STATE_PADO_SENT;
igorsk	0:b56b6a05cad4	448	pppoe_send_pado(sc);
igorsk	0:b56b6a05cad4	449	break;
igorsk	0:b56b6a05cad4	450	#endif /* PPPOE_SERVER */
igorsk	0:b56b6a05cad4	451	case PPPOE_CODE_PADR:
igorsk	0:b56b6a05cad4	452	#ifdef PPPOE_SERVER
igorsk	0:b56b6a05cad4	453	/*
igorsk	0:b56b6a05cad4	454	* get sc from ac_cookie if IFF_PASSIVE
igorsk	0:b56b6a05cad4	455	*/
igorsk	0:b56b6a05cad4	456	if (ac_cookie == NULL) {
igorsk	0:b56b6a05cad4	457	/* be quiet if there is not a single pppoe instance */
igorsk	0:b56b6a05cad4	458	printf("pppoe: received PADR but not includes ac_cookie\n");
igorsk	0:b56b6a05cad4	459	goto done;
igorsk	0:b56b6a05cad4	460	}
igorsk	0:b56b6a05cad4	461	sc = pppoe_find_softc_by_hunique(ac_cookie, ac_cookie_len, netif);
igorsk	0:b56b6a05cad4	462	if (sc == NULL) {
igorsk	0:b56b6a05cad4	463	/* be quiet if there is not a single pppoe instance */
igorsk	0:b56b6a05cad4	464	if (!LIST_EMPTY(&pppoe_softc_list)) {
igorsk	0:b56b6a05cad4	465	printf("pppoe: received PADR but could not find request for it\n");
igorsk	0:b56b6a05cad4	466	}
igorsk	0:b56b6a05cad4	467	goto done;
igorsk	0:b56b6a05cad4	468	}
igorsk	0:b56b6a05cad4	469	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
igorsk	0:b56b6a05cad4	470	printf("%c%c%"U16_F": received unexpected PADR\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
igorsk	0:b56b6a05cad4	471	goto done;
igorsk	0:b56b6a05cad4	472	}
igorsk	0:b56b6a05cad4	473	if (hunique) {
igorsk	0:b56b6a05cad4	474	if (sc->sc_hunique) {
igorsk	0:b56b6a05cad4	475	mem_free(sc->sc_hunique);
igorsk	0:b56b6a05cad4	476	}
igorsk	0:b56b6a05cad4	477	sc->sc_hunique = mem_malloc(hunique_len);
igorsk	0:b56b6a05cad4	478	if (sc->sc_hunique == NULL) {
igorsk	0:b56b6a05cad4	479	goto done;
igorsk	0:b56b6a05cad4	480	}
igorsk	0:b56b6a05cad4	481	sc->sc_hunique_len = hunique_len;
igorsk	0:b56b6a05cad4	482	MEMCPY(sc->sc_hunique, hunique, hunique_len);
igorsk	0:b56b6a05cad4	483	}
igorsk	0:b56b6a05cad4	484	pppoe_send_pads(sc);
igorsk	0:b56b6a05cad4	485	sc->sc_state = PPPOE_STATE_SESSION;
igorsk	0:b56b6a05cad4	486	pppoe_linkstatus_up(sc); /* notify upper layers */
igorsk	0:b56b6a05cad4	487	break;
igorsk	0:b56b6a05cad4	488	#else
igorsk	0:b56b6a05cad4	489	/* ignore, we are no access concentrator */
igorsk	0:b56b6a05cad4	490	goto done;
igorsk	0:b56b6a05cad4	491	#endif /* PPPOE_SERVER */
igorsk	0:b56b6a05cad4	492	case PPPOE_CODE_PADO:
igorsk	0:b56b6a05cad4	493	if (sc == NULL) {
igorsk	0:b56b6a05cad4	494	/* be quiet if there is not a single pppoe instance */
igorsk	0:b56b6a05cad4	495	if (pppoe_softc_list != NULL) {
igorsk	0:b56b6a05cad4	496	printf("pppoe: received PADO but could not find request for it\n");
igorsk	0:b56b6a05cad4	497	}
igorsk	0:b56b6a05cad4	498	goto done;
igorsk	0:b56b6a05cad4	499	}
igorsk	0:b56b6a05cad4	500	if (sc->sc_state != PPPOE_STATE_PADI_SENT) {
igorsk	0:b56b6a05cad4	501	printf("%c%c%"U16_F": received unexpected PADO\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
igorsk	0:b56b6a05cad4	502	goto done;
igorsk	0:b56b6a05cad4	503	}
igorsk	0:b56b6a05cad4	504	if (ac_cookie) {
igorsk	0:b56b6a05cad4	505	sc->sc_ac_cookie_len = ac_cookie_len;
igorsk	0:b56b6a05cad4	506	MEMCPY(sc->sc_ac_cookie, ac_cookie, ac_cookie_len);
igorsk	0:b56b6a05cad4	507	}
igorsk	0:b56b6a05cad4	508	MEMCPY(&sc->sc_dest, ethhdr->src.addr, sizeof(sc->sc_dest.addr));
igorsk	0:b56b6a05cad4	509	sys_untimeout(pppoe_timeout, sc);
igorsk	0:b56b6a05cad4	510	sc->sc_padr_retried = 0;
igorsk	0:b56b6a05cad4	511	sc->sc_state = PPPOE_STATE_PADR_SENT;
igorsk	0:b56b6a05cad4	512	if ((err = pppoe_send_padr(sc)) != 0) {
igorsk	0:b56b6a05cad4	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));
igorsk	0:b56b6a05cad4	514	}
igorsk	0:b56b6a05cad4	515	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
igorsk	0:b56b6a05cad4	516	break;
igorsk	0:b56b6a05cad4	517	case PPPOE_CODE_PADS:
igorsk	0:b56b6a05cad4	518	if (sc == NULL) {
igorsk	0:b56b6a05cad4	519	goto done;
igorsk	0:b56b6a05cad4	520	}
igorsk	0:b56b6a05cad4	521	sc->sc_session = session;
igorsk	0:b56b6a05cad4	522	sys_untimeout(pppoe_timeout, sc);
igorsk	0:b56b6a05cad4	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));
igorsk	0:b56b6a05cad4	524	sc->sc_state = PPPOE_STATE_SESSION;
igorsk	0:b56b6a05cad4	525	pppoe_linkstatus_up(sc); /* notify upper layers */
igorsk	0:b56b6a05cad4	526	break;
igorsk	0:b56b6a05cad4	527	case PPPOE_CODE_PADT:
igorsk	0:b56b6a05cad4	528	if (sc == NULL) {
igorsk	0:b56b6a05cad4	529	goto done;
igorsk	0:b56b6a05cad4	530	}
igorsk	0:b56b6a05cad4	531	pppoe_clear_softc(sc, "received PADT");
igorsk	0:b56b6a05cad4	532	break;
igorsk	0:b56b6a05cad4	533	default:
igorsk	0:b56b6a05cad4	534	if(sc) {
igorsk	0:b56b6a05cad4	535	printf("%c%c%"U16_F": unknown code (0x%"X16_F") session = 0x%"X16_F"\n",
igorsk	0:b56b6a05cad4	536	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
igorsk	0:b56b6a05cad4	537	(u16_t)ph->code, session);
igorsk	0:b56b6a05cad4	538	} else {
igorsk	0:b56b6a05cad4	539	printf("pppoe: unknown code (0x%"X16_F") session = 0x%"X16_F"\n", (u16_t)ph->code, session);
igorsk	0:b56b6a05cad4	540	}
igorsk	0:b56b6a05cad4	541	break;
igorsk	0:b56b6a05cad4	542	}
igorsk	0:b56b6a05cad4	543
igorsk	0:b56b6a05cad4	544	done:
igorsk	0:b56b6a05cad4	545	pbuf_free(pb);
igorsk	0:b56b6a05cad4	546	return;
igorsk	0:b56b6a05cad4	547	}
igorsk	0:b56b6a05cad4	548
igorsk	0:b56b6a05cad4	549	void
igorsk	0:b56b6a05cad4	550	pppoe_disc_input(struct netif netif, struct pbuf p)
igorsk	0:b56b6a05cad4	551	{
igorsk	0:b56b6a05cad4	552	/* avoid error messages if there is not a single pppoe instance */
igorsk	0:b56b6a05cad4	553	if (pppoe_softc_list != NULL) {
igorsk	0:b56b6a05cad4	554	pppoe_dispatch_disc_pkt(netif, p);
igorsk	0:b56b6a05cad4	555	} else {
igorsk	0:b56b6a05cad4	556	pbuf_free(p);
igorsk	0:b56b6a05cad4	557	}
igorsk	0:b56b6a05cad4	558	}
igorsk	0:b56b6a05cad4	559
igorsk	0:b56b6a05cad4	560	void
igorsk	0:b56b6a05cad4	561	pppoe_data_input(struct netif netif, struct pbuf pb)
igorsk	0:b56b6a05cad4	562	{
igorsk	0:b56b6a05cad4	563	u16_t session, plen;
igorsk	0:b56b6a05cad4	564	struct pppoe_softc *sc;
igorsk	0:b56b6a05cad4	565	struct pppoehdr *ph;
igorsk	0:b56b6a05cad4	566	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
igorsk	0:b56b6a05cad4	567	u8_t shost[ETHER_ADDR_LEN];
igorsk	0:b56b6a05cad4	568	#endif
igorsk	0:b56b6a05cad4	569
igorsk	0:b56b6a05cad4	570	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
igorsk	0:b56b6a05cad4	571	MEMCPY(shost, ((struct eth_hdr *)pb->payload)->src.addr, sizeof(shost));
igorsk	0:b56b6a05cad4	572	#endif
igorsk	0:b56b6a05cad4	573	if (pbuf_header(pb, -(int)sizeof(struct eth_hdr)) != 0) {
igorsk	0:b56b6a05cad4	574	/* bail out */
igorsk	0:b56b6a05cad4	575	PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header failed\n"));
igorsk	0:b56b6a05cad4	576	LINK_STATS_INC(link.lenerr);
igorsk	0:b56b6a05cad4	577	goto drop;
igorsk	0:b56b6a05cad4	578	}
igorsk	0:b56b6a05cad4	579
igorsk	0:b56b6a05cad4	580	pb = pppSingleBuf (pb);
igorsk	0:b56b6a05cad4	581
igorsk	0:b56b6a05cad4	582	if (pb->len <= PPPOE_HEADERLEN) {
igorsk	0:b56b6a05cad4	583	printf("pppoe (data): dropping too short packet: %d bytes\n", pb->len);
igorsk	0:b56b6a05cad4	584	goto drop;
igorsk	0:b56b6a05cad4	585	}
igorsk	0:b56b6a05cad4	586
igorsk	0:b56b6a05cad4	587	if (pb->len < sizeof(*ph)) {
igorsk	0:b56b6a05cad4	588	printf("pppoe_data_input: could not get PPPoE header\n");
igorsk	0:b56b6a05cad4	589	goto drop;
igorsk	0:b56b6a05cad4	590	}
igorsk	0:b56b6a05cad4	591	ph = (struct pppoehdr *)pb->payload;
igorsk	0:b56b6a05cad4	592
igorsk	0:b56b6a05cad4	593	if (ph->vertype != PPPOE_VERTYPE) {
igorsk	0:b56b6a05cad4	594	printf("pppoe (data): unknown version/type packet: 0x%x\n", ph->vertype);
igorsk	0:b56b6a05cad4	595	goto drop;
igorsk	0:b56b6a05cad4	596	}
igorsk	0:b56b6a05cad4	597	if (ph->code != 0) {
igorsk	0:b56b6a05cad4	598	goto drop;
igorsk	0:b56b6a05cad4	599	}
igorsk	0:b56b6a05cad4	600
igorsk	0:b56b6a05cad4	601	session = ntohs(ph->session);
igorsk	0:b56b6a05cad4	602	sc = pppoe_find_softc_by_session(session, netif);
igorsk	0:b56b6a05cad4	603	if (sc == NULL) {
igorsk	0:b56b6a05cad4	604	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
igorsk	0:b56b6a05cad4	605	printf("pppoe: input for unknown session 0x%x, sending PADT\n", session);
igorsk	0:b56b6a05cad4	606	pppoe_send_padt(netif, session, shost);
igorsk	0:b56b6a05cad4	607	#endif
igorsk	0:b56b6a05cad4	608	goto drop;
igorsk	0:b56b6a05cad4	609	}
igorsk	0:b56b6a05cad4	610
igorsk	0:b56b6a05cad4	611	plen = ntohs(ph->plen);
igorsk	0:b56b6a05cad4	612
igorsk	0:b56b6a05cad4	613	if (pbuf_header(pb, -(int)(PPPOE_HEADERLEN)) != 0) {
igorsk	0:b56b6a05cad4	614	/* bail out */
igorsk	0:b56b6a05cad4	615	PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header PPPOE_HEADERLEN failed\n"));
igorsk	0:b56b6a05cad4	616	LINK_STATS_INC(link.lenerr);
igorsk	0:b56b6a05cad4	617	goto drop;
igorsk	0:b56b6a05cad4	618	}
igorsk	0:b56b6a05cad4	619
igorsk	0:b56b6a05cad4	620	PPPDEBUG(LOG_DEBUG, ("pppoe_data_input: %c%c%"U16_F": pkthdr.len=%d, pppoe.len=%d\n",
igorsk	0:b56b6a05cad4	621	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
igorsk	0:b56b6a05cad4	622	pb->len, plen));
igorsk	0:b56b6a05cad4	623
igorsk	0:b56b6a05cad4	624	if (pb->len < plen) {
igorsk	0:b56b6a05cad4	625	goto drop;
igorsk	0:b56b6a05cad4	626	}
igorsk	0:b56b6a05cad4	627
igorsk	0:b56b6a05cad4	628	pppInProcOverEthernet(sc->sc_pd, pb);
igorsk	0:b56b6a05cad4	629
igorsk	0:b56b6a05cad4	630	return;
igorsk	0:b56b6a05cad4	631
igorsk	0:b56b6a05cad4	632	drop:
igorsk	0:b56b6a05cad4	633	pbuf_free(pb);
igorsk	0:b56b6a05cad4	634	}
igorsk	0:b56b6a05cad4	635
igorsk	0:b56b6a05cad4	636	static err_t
igorsk	0:b56b6a05cad4	637	pppoe_output(struct pppoe_softc sc, struct pbuf pb)
igorsk	0:b56b6a05cad4	638	{
igorsk	0:b56b6a05cad4	639	struct eth_hdr *ethhdr;
igorsk	0:b56b6a05cad4	640	u16_t etype;
igorsk	0:b56b6a05cad4	641	err_t res;
igorsk	0:b56b6a05cad4	642
igorsk	0:b56b6a05cad4	643	if (!sc->sc_ethif) {
igorsk	0:b56b6a05cad4	644	pbuf_free(pb);
igorsk	0:b56b6a05cad4	645	return ERR_IF;
igorsk	0:b56b6a05cad4	646	}
igorsk	0:b56b6a05cad4	647
igorsk	0:b56b6a05cad4	648	ethhdr = (struct eth_hdr *)pb->payload;
igorsk	0:b56b6a05cad4	649	etype = sc->sc_state == PPPOE_STATE_SESSION ? ETHTYPE_PPPOE : ETHTYPE_PPPOEDISC;
igorsk	0:b56b6a05cad4	650	ethhdr->type = htons(etype);
igorsk	0:b56b6a05cad4	651	MEMCPY(ethhdr->dest.addr, sc->sc_dest.addr, sizeof(ethhdr->dest.addr));
igorsk	0:b56b6a05cad4	652	MEMCPY(ethhdr->src.addr, ((struct eth_addr *)sc->sc_ethif->hwaddr)->addr, sizeof(ethhdr->src.addr));
igorsk	0:b56b6a05cad4	653
igorsk	0:b56b6a05cad4	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",
igorsk	0:b56b6a05cad4	655	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, etype,
igorsk	0:b56b6a05cad4	656	sc->sc_state, sc->sc_session,
igorsk	0:b56b6a05cad4	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],
igorsk	0:b56b6a05cad4	658	pb->tot_len));
igorsk	0:b56b6a05cad4	659
igorsk	0:b56b6a05cad4	660	res = sc->sc_ethif->linkoutput(sc->sc_ethif, pb);
igorsk	0:b56b6a05cad4	661
igorsk	0:b56b6a05cad4	662	pbuf_free(pb);
igorsk	0:b56b6a05cad4	663
igorsk	0:b56b6a05cad4	664	return res;
igorsk	0:b56b6a05cad4	665	}
igorsk	0:b56b6a05cad4	666
igorsk	0:b56b6a05cad4	667	static err_t
igorsk	0:b56b6a05cad4	668	pppoe_send_padi(struct pppoe_softc *sc)
igorsk	0:b56b6a05cad4	669	{
igorsk	0:b56b6a05cad4	670	struct pbuf *pb;
igorsk	0:b56b6a05cad4	671	u8_t *p;
igorsk	0:b56b6a05cad4	672	int len;
igorsk	0:b56b6a05cad4	673	#ifdef PPPOE_TODO
igorsk	0:b56b6a05cad4	674	int l1 = 0, l2 = 0; /* XXX: gcc */
igorsk	0:b56b6a05cad4	675	#endif /* PPPOE_TODO */
igorsk	0:b56b6a05cad4	676
igorsk	0:b56b6a05cad4	677	if (sc->sc_state >PPPOE_STATE_PADI_SENT) {
igorsk	0:b56b6a05cad4	678	PPPDEBUG(LOG_ERR, ("ERROR: pppoe_send_padi in state %d", sc->sc_state));
igorsk	0:b56b6a05cad4	679	}
igorsk	0:b56b6a05cad4	680
igorsk	0:b56b6a05cad4	681	/* calculate length of frame (excluding ethernet header + pppoe header) */
igorsk	0:b56b6a05cad4	682	len = 2 + 2 + 2 + 2 + sizeof sc; /* service name tag is required, host unique is send too */
igorsk	0:b56b6a05cad4	683	#ifdef PPPOE_TODO
igorsk	0:b56b6a05cad4	684	if (sc->sc_service_name != NULL) {
igorsk	0:b56b6a05cad4	685	l1 = (int)strlen(sc->sc_service_name);
igorsk	0:b56b6a05cad4	686	len += l1;
igorsk	0:b56b6a05cad4	687	}
igorsk	0:b56b6a05cad4	688	if (sc->sc_concentrator_name != NULL) {
igorsk	0:b56b6a05cad4	689	l2 = (int)strlen(sc->sc_concentrator_name);
igorsk	0:b56b6a05cad4	690	len += 2 + 2 + l2;
igorsk	0:b56b6a05cad4	691	}
igorsk	0:b56b6a05cad4	692	#endif /* PPPOE_TODO */
igorsk	0:b56b6a05cad4	693	LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
igorsk	0:b56b6a05cad4	694	sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
igorsk	0:b56b6a05cad4	695
igorsk	0:b56b6a05cad4	696	/* allocate a buffer */
igorsk	0:b56b6a05cad4	697	pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
igorsk	0:b56b6a05cad4	698	if (!pb) {
igorsk	0:b56b6a05cad4	699	return ERR_MEM;
igorsk	0:b56b6a05cad4	700	}
igorsk	0:b56b6a05cad4	701	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
igorsk	0:b56b6a05cad4	702
igorsk	0:b56b6a05cad4	703	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
igorsk	0:b56b6a05cad4	704	/* fill in pkt */
igorsk	0:b56b6a05cad4	705	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADI, 0, (u16_t)len);
igorsk	0:b56b6a05cad4	706	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
igorsk	0:b56b6a05cad4	707	#ifdef PPPOE_TODO
igorsk	0:b56b6a05cad4	708	if (sc->sc_service_name != NULL) {
igorsk	0:b56b6a05cad4	709	PPPOE_ADD_16(p, l1);
igorsk	0:b56b6a05cad4	710	MEMCPY(p, sc->sc_service_name, l1);
igorsk	0:b56b6a05cad4	711	p += l1;
igorsk	0:b56b6a05cad4	712	} else
igorsk	0:b56b6a05cad4	713	#endif /* PPPOE_TODO */
igorsk	0:b56b6a05cad4	714	{
igorsk	0:b56b6a05cad4	715	PPPOE_ADD_16(p, 0);
igorsk	0:b56b6a05cad4	716	}
igorsk	0:b56b6a05cad4	717	#ifdef PPPOE_TODO
igorsk	0:b56b6a05cad4	718	if (sc->sc_concentrator_name != NULL) {
igorsk	0:b56b6a05cad4	719	PPPOE_ADD_16(p, PPPOE_TAG_ACNAME);
igorsk	0:b56b6a05cad4	720	PPPOE_ADD_16(p, l2);
igorsk	0:b56b6a05cad4	721	MEMCPY(p, sc->sc_concentrator_name, l2);
igorsk	0:b56b6a05cad4	722	p += l2;
igorsk	0:b56b6a05cad4	723	}
igorsk	0:b56b6a05cad4	724	#endif /* PPPOE_TODO */
igorsk	0:b56b6a05cad4	725	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
igorsk	0:b56b6a05cad4	726	PPPOE_ADD_16(p, sizeof(sc));
igorsk	0:b56b6a05cad4	727	MEMCPY(p, &sc, sizeof sc);
igorsk	0:b56b6a05cad4	728
igorsk	0:b56b6a05cad4	729	/* send pkt */
igorsk	0:b56b6a05cad4	730	return pppoe_output(sc, pb);
igorsk	0:b56b6a05cad4	731	}
igorsk	0:b56b6a05cad4	732
igorsk	0:b56b6a05cad4	733	static void
igorsk	0:b56b6a05cad4	734	pppoe_timeout(void *arg)
igorsk	0:b56b6a05cad4	735	{
igorsk	0:b56b6a05cad4	736	int retry_wait, err;
igorsk	0:b56b6a05cad4	737	struct pppoe_softc sc = (struct pppoe_softc)arg;
igorsk	0:b56b6a05cad4	738
igorsk	0:b56b6a05cad4	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));
igorsk	0:b56b6a05cad4	740
igorsk	0:b56b6a05cad4	741	switch (sc->sc_state) {
igorsk	0:b56b6a05cad4	742	case PPPOE_STATE_PADI_SENT:
igorsk	0:b56b6a05cad4	743	/*
igorsk	0:b56b6a05cad4	744	* We have two basic ways of retrying:
igorsk	0:b56b6a05cad4	745	* - Quick retry mode: try a few times in short sequence
igorsk	0:b56b6a05cad4	746	* - Slow retry mode: we already had a connection successfully
igorsk	0:b56b6a05cad4	747	* established and will try infinitely (without user
igorsk	0:b56b6a05cad4	748	* intervention)
igorsk	0:b56b6a05cad4	749	* We only enter slow retry mode if IFF_LINK1 (aka autodial)
igorsk	0:b56b6a05cad4	750	* is not set.
igorsk	0:b56b6a05cad4	751	*/
igorsk	0:b56b6a05cad4	752
igorsk	0:b56b6a05cad4	753	/* initialize for quick retry mode */
igorsk	0:b56b6a05cad4	754	retry_wait = PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried);
igorsk	0:b56b6a05cad4	755
igorsk	0:b56b6a05cad4	756	sc->sc_padi_retried++;
igorsk	0:b56b6a05cad4	757	if (sc->sc_padi_retried >= PPPOE_DISC_MAXPADI) {
igorsk	0:b56b6a05cad4	758	#if 0
igorsk	0:b56b6a05cad4	759	if ((sc->sc_sppp.pp_if.if_flags & IFF_LINK1) == 0) {
igorsk	0:b56b6a05cad4	760	/* slow retry mode */
igorsk	0:b56b6a05cad4	761	retry_wait = PPPOE_SLOW_RETRY;
igorsk	0:b56b6a05cad4	762	} else
igorsk	0:b56b6a05cad4	763	#endif
igorsk	0:b56b6a05cad4	764	{
igorsk	0:b56b6a05cad4	765	pppoe_abort_connect(sc);
igorsk	0:b56b6a05cad4	766	return;
igorsk	0:b56b6a05cad4	767	}
igorsk	0:b56b6a05cad4	768	}
igorsk	0:b56b6a05cad4	769	if ((err = pppoe_send_padi(sc)) != 0) {
igorsk	0:b56b6a05cad4	770	sc->sc_padi_retried--;
igorsk	0:b56b6a05cad4	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));
igorsk	0:b56b6a05cad4	772	}
igorsk	0:b56b6a05cad4	773	sys_timeout(retry_wait, pppoe_timeout, sc);
igorsk	0:b56b6a05cad4	774	break;
igorsk	0:b56b6a05cad4	775
igorsk	0:b56b6a05cad4	776	case PPPOE_STATE_PADR_SENT:
igorsk	0:b56b6a05cad4	777	sc->sc_padr_retried++;
igorsk	0:b56b6a05cad4	778	if (sc->sc_padr_retried >= PPPOE_DISC_MAXPADR) {
igorsk	0:b56b6a05cad4	779	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
igorsk	0:b56b6a05cad4	780	sc->sc_state = PPPOE_STATE_PADI_SENT;
igorsk	0:b56b6a05cad4	781	sc->sc_padr_retried = 0;
igorsk	0:b56b6a05cad4	782	if ((err = pppoe_send_padi(sc)) != 0) {
igorsk	0:b56b6a05cad4	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));
igorsk	0:b56b6a05cad4	784	}
igorsk	0:b56b6a05cad4	785	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried), pppoe_timeout, sc);
igorsk	0:b56b6a05cad4	786	return;
igorsk	0:b56b6a05cad4	787	}
igorsk	0:b56b6a05cad4	788	if ((err = pppoe_send_padr(sc)) != 0) {
igorsk	0:b56b6a05cad4	789	sc->sc_padr_retried--;
igorsk	0:b56b6a05cad4	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));
igorsk	0:b56b6a05cad4	791	}
igorsk	0:b56b6a05cad4	792	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
igorsk	0:b56b6a05cad4	793	break;
igorsk	0:b56b6a05cad4	794	case PPPOE_STATE_CLOSING:
igorsk	0:b56b6a05cad4	795	pppoe_do_disconnect(sc);
igorsk	0:b56b6a05cad4	796	break;
igorsk	0:b56b6a05cad4	797	default:
igorsk	0:b56b6a05cad4	798	return; /* all done, work in peace */
igorsk	0:b56b6a05cad4	799	}
igorsk	0:b56b6a05cad4	800	}
igorsk	0:b56b6a05cad4	801
igorsk	0:b56b6a05cad4	802	/* Start a connection (i.e. initiate discovery phase) */
igorsk	0:b56b6a05cad4	803	int
igorsk	0:b56b6a05cad4	804	pppoe_connect(struct pppoe_softc *sc)
igorsk	0:b56b6a05cad4	805	{
igorsk	0:b56b6a05cad4	806	int err;
igorsk	0:b56b6a05cad4	807
igorsk	0:b56b6a05cad4	808	if (sc->sc_state != PPPOE_STATE_INITIAL) {
igorsk	0:b56b6a05cad4	809	return EBUSY;
igorsk	0:b56b6a05cad4	810	}
igorsk	0:b56b6a05cad4	811
igorsk	0:b56b6a05cad4	812	#ifdef PPPOE_SERVER
igorsk	0:b56b6a05cad4	813	/* wait PADI if IFF_PASSIVE */
igorsk	0:b56b6a05cad4	814	if ((sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
igorsk	0:b56b6a05cad4	815	return 0;
igorsk	0:b56b6a05cad4	816	}
igorsk	0:b56b6a05cad4	817	#endif
igorsk	0:b56b6a05cad4	818	/* save state, in case we fail to send PADI */
igorsk	0:b56b6a05cad4	819	sc->sc_state = PPPOE_STATE_PADI_SENT;
igorsk	0:b56b6a05cad4	820	sc->sc_padr_retried = 0;
igorsk	0:b56b6a05cad4	821	err = pppoe_send_padi(sc);
igorsk	0:b56b6a05cad4	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));
igorsk	0:b56b6a05cad4	823	sys_timeout(PPPOE_DISC_TIMEOUT, pppoe_timeout, sc);
igorsk	0:b56b6a05cad4	824	return err;
igorsk	0:b56b6a05cad4	825	}
igorsk	0:b56b6a05cad4	826
igorsk	0:b56b6a05cad4	827	/* disconnect */
igorsk	0:b56b6a05cad4	828	void
igorsk	0:b56b6a05cad4	829	pppoe_disconnect(struct pppoe_softc *sc)
igorsk	0:b56b6a05cad4	830	{
igorsk	0:b56b6a05cad4	831	if (sc->sc_state < PPPOE_STATE_SESSION) {
igorsk	0:b56b6a05cad4	832	return;
igorsk	0:b56b6a05cad4	833	}
igorsk	0:b56b6a05cad4	834	/*
igorsk	0:b56b6a05cad4	835	* Do not call pppoe_disconnect here, the upper layer state
igorsk	0:b56b6a05cad4	836	* machine gets confused by this. We must return from this
igorsk	0:b56b6a05cad4	837	* function and defer disconnecting to the timeout handler.
igorsk	0:b56b6a05cad4	838	*/
igorsk	0:b56b6a05cad4	839	sc->sc_state = PPPOE_STATE_CLOSING;
igorsk	0:b56b6a05cad4	840	sys_timeout(20, pppoe_timeout, sc);
igorsk	0:b56b6a05cad4	841	}
igorsk	0:b56b6a05cad4	842
igorsk	0:b56b6a05cad4	843	static int
igorsk	0:b56b6a05cad4	844	pppoe_do_disconnect(struct pppoe_softc *sc)
igorsk	0:b56b6a05cad4	845	{
igorsk	0:b56b6a05cad4	846	int err;
igorsk	0:b56b6a05cad4	847
igorsk	0:b56b6a05cad4	848	if (sc->sc_state < PPPOE_STATE_SESSION) {
igorsk	0:b56b6a05cad4	849	err = EBUSY;
igorsk	0:b56b6a05cad4	850	} else {
igorsk	0:b56b6a05cad4	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));
igorsk	0:b56b6a05cad4	852	err = pppoe_send_padt(sc->sc_ethif, sc->sc_session, (const u8_t *)&sc->sc_dest);
igorsk	0:b56b6a05cad4	853	}
igorsk	0:b56b6a05cad4	854
igorsk	0:b56b6a05cad4	855	/* cleanup softc */
igorsk	0:b56b6a05cad4	856	sc->sc_state = PPPOE_STATE_INITIAL;
igorsk	0:b56b6a05cad4	857	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
igorsk	0:b56b6a05cad4	858	sc->sc_ac_cookie_len = 0;
igorsk	0:b56b6a05cad4	859	#ifdef PPPOE_SERVER
igorsk	0:b56b6a05cad4	860	if (sc->sc_hunique) {
igorsk	0:b56b6a05cad4	861	mem_free(sc->sc_hunique);
igorsk	0:b56b6a05cad4	862	sc->sc_hunique = NULL;
igorsk	0:b56b6a05cad4	863	}
igorsk	0:b56b6a05cad4	864	sc->sc_hunique_len = 0;
igorsk	0:b56b6a05cad4	865	#endif
igorsk	0:b56b6a05cad4	866	sc->sc_session = 0;
igorsk	0:b56b6a05cad4	867
igorsk	0:b56b6a05cad4	868	sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
igorsk	0:b56b6a05cad4	869
igorsk	0:b56b6a05cad4	870	return err;
igorsk	0:b56b6a05cad4	871	}
igorsk	0:b56b6a05cad4	872
igorsk	0:b56b6a05cad4	873	/* Connection attempt aborted */
igorsk	0:b56b6a05cad4	874	static void
igorsk	0:b56b6a05cad4	875	pppoe_abort_connect(struct pppoe_softc *sc)
igorsk	0:b56b6a05cad4	876	{
igorsk	0:b56b6a05cad4	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);
igorsk	0:b56b6a05cad4	878	sc->sc_state = PPPOE_STATE_CLOSING;
igorsk	0:b56b6a05cad4	879
igorsk	0:b56b6a05cad4	880	sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
igorsk	0:b56b6a05cad4	881
igorsk	0:b56b6a05cad4	882	/* clear connection state */
igorsk	0:b56b6a05cad4	883	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
igorsk	0:b56b6a05cad4	884	sc->sc_state = PPPOE_STATE_INITIAL;
igorsk	0:b56b6a05cad4	885	}
igorsk	0:b56b6a05cad4	886
igorsk	0:b56b6a05cad4	887	/* Send a PADR packet */
igorsk	0:b56b6a05cad4	888	static err_t
igorsk	0:b56b6a05cad4	889	pppoe_send_padr(struct pppoe_softc *sc)
igorsk	0:b56b6a05cad4	890	{
igorsk	0:b56b6a05cad4	891	struct pbuf *pb;
igorsk	0:b56b6a05cad4	892	u8_t *p;
igorsk	0:b56b6a05cad4	893	size_t len;
igorsk	0:b56b6a05cad4	894	#ifdef PPPOE_TODO
igorsk	0:b56b6a05cad4	895	size_t l1 = 0; /* XXX: gcc */
igorsk	0:b56b6a05cad4	896	#endif /* PPPOE_TODO */
igorsk	0:b56b6a05cad4	897
igorsk	0:b56b6a05cad4	898	if (sc->sc_state != PPPOE_STATE_PADR_SENT) {
igorsk	0:b56b6a05cad4	899	return ERR_CONN;
igorsk	0:b56b6a05cad4	900	}
igorsk	0:b56b6a05cad4	901
igorsk	0:b56b6a05cad4	902	len = 2 + 2 + 2 + 2 + sizeof(sc); /* service name, host unique */
igorsk	0:b56b6a05cad4	903	#ifdef PPPOE_TODO
igorsk	0:b56b6a05cad4	904	if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
igorsk	0:b56b6a05cad4	905	l1 = strlen(sc->sc_service_name);
igorsk	0:b56b6a05cad4	906	len += l1;
igorsk	0:b56b6a05cad4	907	}
igorsk	0:b56b6a05cad4	908	#endif /* PPPOE_TODO */
igorsk	0:b56b6a05cad4	909	if (sc->sc_ac_cookie_len > 0) {
igorsk	0:b56b6a05cad4	910	len += 2 + 2 + sc->sc_ac_cookie_len; /* AC cookie */
igorsk	0:b56b6a05cad4	911	}
igorsk	0:b56b6a05cad4	912	LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
igorsk	0:b56b6a05cad4	913	sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
igorsk	0:b56b6a05cad4	914	pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
igorsk	0:b56b6a05cad4	915	if (!pb) {
igorsk	0:b56b6a05cad4	916	return ERR_MEM;
igorsk	0:b56b6a05cad4	917	}
igorsk	0:b56b6a05cad4	918	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
igorsk	0:b56b6a05cad4	919	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
igorsk	0:b56b6a05cad4	920	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADR, 0, len);
igorsk	0:b56b6a05cad4	921	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
igorsk	0:b56b6a05cad4	922	#ifdef PPPOE_TODO
igorsk	0:b56b6a05cad4	923	if (sc->sc_service_name != NULL) {
igorsk	0:b56b6a05cad4	924	PPPOE_ADD_16(p, l1);
igorsk	0:b56b6a05cad4	925	MEMCPY(p, sc->sc_service_name, l1);
igorsk	0:b56b6a05cad4	926	p += l1;
igorsk	0:b56b6a05cad4	927	} else
igorsk	0:b56b6a05cad4	928	#endif /* PPPOE_TODO */
igorsk	0:b56b6a05cad4	929	{
igorsk	0:b56b6a05cad4	930	PPPOE_ADD_16(p, 0);
igorsk	0:b56b6a05cad4	931	}
igorsk	0:b56b6a05cad4	932	if (sc->sc_ac_cookie_len > 0) {
igorsk	0:b56b6a05cad4	933	PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
igorsk	0:b56b6a05cad4	934	PPPOE_ADD_16(p, sc->sc_ac_cookie_len);
igorsk	0:b56b6a05cad4	935	MEMCPY(p, sc->sc_ac_cookie, sc->sc_ac_cookie_len);
igorsk	0:b56b6a05cad4	936	p += sc->sc_ac_cookie_len;
igorsk	0:b56b6a05cad4	937	}
igorsk	0:b56b6a05cad4	938	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
igorsk	0:b56b6a05cad4	939	PPPOE_ADD_16(p, sizeof(sc));
igorsk	0:b56b6a05cad4	940	MEMCPY(p, &sc, sizeof sc);
igorsk	0:b56b6a05cad4	941
igorsk	0:b56b6a05cad4	942	return pppoe_output(sc, pb);
igorsk	0:b56b6a05cad4	943	}
igorsk	0:b56b6a05cad4	944
igorsk	0:b56b6a05cad4	945	/* send a PADT packet */
igorsk	0:b56b6a05cad4	946	static err_t
igorsk	0:b56b6a05cad4	947	pppoe_send_padt(struct netif outgoing_if, u_int session, const u8_t dest)
igorsk	0:b56b6a05cad4	948	{
igorsk	0:b56b6a05cad4	949	struct pbuf *pb;
igorsk	0:b56b6a05cad4	950	struct eth_hdr *ethhdr;
igorsk	0:b56b6a05cad4	951	err_t res;
igorsk	0:b56b6a05cad4	952	u8_t *p;
igorsk	0:b56b6a05cad4	953
igorsk	0:b56b6a05cad4	954	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN, PBUF_RAM);
igorsk	0:b56b6a05cad4	955	if (!pb) {
igorsk	0:b56b6a05cad4	956	return ERR_MEM;
igorsk	0:b56b6a05cad4	957	}
igorsk	0:b56b6a05cad4	958	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
igorsk	0:b56b6a05cad4	959
igorsk	0:b56b6a05cad4	960	ethhdr = (struct eth_hdr *)pb->payload;
igorsk	0:b56b6a05cad4	961	ethhdr->type = PP_HTONS(ETHTYPE_PPPOEDISC);
igorsk	0:b56b6a05cad4	962	MEMCPY(ethhdr->dest.addr, dest, sizeof(ethhdr->dest.addr));
igorsk	0:b56b6a05cad4	963	MEMCPY(ethhdr->src.addr, ((struct eth_addr *)outgoing_if->hwaddr)->addr, sizeof(ethhdr->src.addr));
igorsk	0:b56b6a05cad4	964
igorsk	0:b56b6a05cad4	965	p = (u8_t*)(ethhdr + 1);
igorsk	0:b56b6a05cad4	966	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADT, session, 0);
igorsk	0:b56b6a05cad4	967
igorsk	0:b56b6a05cad4	968	res = outgoing_if->linkoutput(outgoing_if, pb);
igorsk	0:b56b6a05cad4	969
igorsk	0:b56b6a05cad4	970	pbuf_free(pb);
igorsk	0:b56b6a05cad4	971
igorsk	0:b56b6a05cad4	972	return res;
igorsk	0:b56b6a05cad4	973	}
igorsk	0:b56b6a05cad4	974
igorsk	0:b56b6a05cad4	975	#ifdef PPPOE_SERVER
igorsk	0:b56b6a05cad4	976	static err_t
igorsk	0:b56b6a05cad4	977	pppoe_send_pado(struct pppoe_softc *sc)
igorsk	0:b56b6a05cad4	978	{
igorsk	0:b56b6a05cad4	979	struct pbuf *pb;
igorsk	0:b56b6a05cad4	980	u8_t *p;
igorsk	0:b56b6a05cad4	981	size_t len;
igorsk	0:b56b6a05cad4	982
igorsk	0:b56b6a05cad4	983	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
igorsk	0:b56b6a05cad4	984	return ERR_CONN;
igorsk	0:b56b6a05cad4	985	}
igorsk	0:b56b6a05cad4	986
igorsk	0:b56b6a05cad4	987	/* calc length */
igorsk	0:b56b6a05cad4	988	len = 0;
igorsk	0:b56b6a05cad4	989	/* include ac_cookie */
igorsk	0:b56b6a05cad4	990	len += 2 + 2 + sizeof(sc);
igorsk	0:b56b6a05cad4	991	/* include hunique */
igorsk	0:b56b6a05cad4	992	len += 2 + 2 + sc->sc_hunique_len;
igorsk	0:b56b6a05cad4	993	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
igorsk	0:b56b6a05cad4	994	if (!pb) {
igorsk	0:b56b6a05cad4	995	return ERR_MEM;
igorsk	0:b56b6a05cad4	996	}
igorsk	0:b56b6a05cad4	997	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
igorsk	0:b56b6a05cad4	998	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
igorsk	0:b56b6a05cad4	999	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADO, 0, len);
igorsk	0:b56b6a05cad4	1000	PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
igorsk	0:b56b6a05cad4	1001	PPPOE_ADD_16(p, sizeof(sc));
igorsk	0:b56b6a05cad4	1002	MEMCPY(p, &sc, sizeof(sc));
igorsk	0:b56b6a05cad4	1003	p += sizeof(sc);
igorsk	0:b56b6a05cad4	1004	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
igorsk	0:b56b6a05cad4	1005	PPPOE_ADD_16(p, sc->sc_hunique_len);
igorsk	0:b56b6a05cad4	1006	MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
igorsk	0:b56b6a05cad4	1007	return pppoe_output(sc, pb);
igorsk	0:b56b6a05cad4	1008	}
igorsk	0:b56b6a05cad4	1009
igorsk	0:b56b6a05cad4	1010	static err_t
igorsk	0:b56b6a05cad4	1011	pppoe_send_pads(struct pppoe_softc *sc)
igorsk	0:b56b6a05cad4	1012	{
igorsk	0:b56b6a05cad4	1013	struct pbuf *pb;
igorsk	0:b56b6a05cad4	1014	u8_t *p;
igorsk	0:b56b6a05cad4	1015	size_t len, l1 = 0; /* XXX: gcc */
igorsk	0:b56b6a05cad4	1016
igorsk	0:b56b6a05cad4	1017	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
igorsk	0:b56b6a05cad4	1018	return ERR_CONN;
igorsk	0:b56b6a05cad4	1019	}
igorsk	0:b56b6a05cad4	1020
igorsk	0:b56b6a05cad4	1021	sc->sc_session = mono_time.tv_sec % 0xff + 1;
igorsk	0:b56b6a05cad4	1022	/* calc length */
igorsk	0:b56b6a05cad4	1023	len = 0;
igorsk	0:b56b6a05cad4	1024	/* include hunique */
igorsk	0:b56b6a05cad4	1025	len += 2 + 2 + 2 + 2 + sc->sc_hunique_len; /* service name, host unique*/
igorsk	0:b56b6a05cad4	1026	if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
igorsk	0:b56b6a05cad4	1027	l1 = strlen(sc->sc_service_name);
igorsk	0:b56b6a05cad4	1028	len += l1;
igorsk	0:b56b6a05cad4	1029	}
igorsk	0:b56b6a05cad4	1030	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
igorsk	0:b56b6a05cad4	1031	if (!pb) {
igorsk	0:b56b6a05cad4	1032	return ERR_MEM;
igorsk	0:b56b6a05cad4	1033	}
igorsk	0:b56b6a05cad4	1034	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
igorsk	0:b56b6a05cad4	1035	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
igorsk	0:b56b6a05cad4	1036	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADS, sc->sc_session, len);
igorsk	0:b56b6a05cad4	1037	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
igorsk	0:b56b6a05cad4	1038	if (sc->sc_service_name != NULL) {
igorsk	0:b56b6a05cad4	1039	PPPOE_ADD_16(p, l1);
igorsk	0:b56b6a05cad4	1040	MEMCPY(p, sc->sc_service_name, l1);
igorsk	0:b56b6a05cad4	1041	p += l1;
igorsk	0:b56b6a05cad4	1042	} else {
igorsk	0:b56b6a05cad4	1043	PPPOE_ADD_16(p, 0);
igorsk	0:b56b6a05cad4	1044	}
igorsk	0:b56b6a05cad4	1045	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
igorsk	0:b56b6a05cad4	1046	PPPOE_ADD_16(p, sc->sc_hunique_len);
igorsk	0:b56b6a05cad4	1047	MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
igorsk	0:b56b6a05cad4	1048	return pppoe_output(sc, pb);
igorsk	0:b56b6a05cad4	1049	}
igorsk	0:b56b6a05cad4	1050	#endif
igorsk	0:b56b6a05cad4	1051
igorsk	0:b56b6a05cad4	1052	err_t
igorsk	0:b56b6a05cad4	1053	pppoe_xmit(struct pppoe_softc sc, struct pbuf pb)
igorsk	0:b56b6a05cad4	1054	{
igorsk	0:b56b6a05cad4	1055	u8_t *p;
igorsk	0:b56b6a05cad4	1056	size_t len;
igorsk	0:b56b6a05cad4	1057
igorsk	0:b56b6a05cad4	1058	/* are we ready to process data yet? */
igorsk	0:b56b6a05cad4	1059	if (sc->sc_state < PPPOE_STATE_SESSION) {
igorsk	0:b56b6a05cad4	1060	/sppp_flush(&sc->sc_sppp.pp_if);/
igorsk	0:b56b6a05cad4	1061	pbuf_free(pb);
igorsk	0:b56b6a05cad4	1062	return ERR_CONN;
igorsk	0:b56b6a05cad4	1063	}
igorsk	0:b56b6a05cad4	1064
igorsk	0:b56b6a05cad4	1065	len = pb->tot_len;
igorsk	0:b56b6a05cad4	1066
igorsk	0:b56b6a05cad4	1067	/* make room for Ethernet header - should not fail */
igorsk	0:b56b6a05cad4	1068	if (pbuf_header(pb, sizeof(struct eth_hdr) + PPPOE_HEADERLEN) != 0) {
igorsk	0:b56b6a05cad4	1069	/* bail out */
igorsk	0:b56b6a05cad4	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));
igorsk	0:b56b6a05cad4	1071	LINK_STATS_INC(link.lenerr);
igorsk	0:b56b6a05cad4	1072	pbuf_free(pb);
igorsk	0:b56b6a05cad4	1073	return ERR_BUF;
igorsk	0:b56b6a05cad4	1074	}
igorsk	0:b56b6a05cad4	1075
igorsk	0:b56b6a05cad4	1076	p = (u8_t*)pb->payload + sizeof(struct eth_hdr);
igorsk	0:b56b6a05cad4	1077	PPPOE_ADD_HEADER(p, 0, sc->sc_session, len);
igorsk	0:b56b6a05cad4	1078
igorsk	0:b56b6a05cad4	1079	return pppoe_output(sc, pb);
igorsk	0:b56b6a05cad4	1080	}
igorsk	0:b56b6a05cad4	1081
igorsk	0:b56b6a05cad4	1082	#if 0 /def PFIL_HOOKS/
igorsk	0:b56b6a05cad4	1083	static int
igorsk	0:b56b6a05cad4	1084	pppoe_ifattach_hook(void arg, struct pbuf mp, struct netif ifp, int dir)
igorsk	0:b56b6a05cad4	1085	{
igorsk	0:b56b6a05cad4	1086	struct pppoe_softc *sc;
igorsk	0:b56b6a05cad4	1087	int s;
igorsk	0:b56b6a05cad4	1088
igorsk	0:b56b6a05cad4	1089	if (mp != (struct pbuf **)PFIL_IFNET_DETACH) {
igorsk	0:b56b6a05cad4	1090	return 0;
igorsk	0:b56b6a05cad4	1091	}
igorsk	0:b56b6a05cad4	1092
igorsk	0:b56b6a05cad4	1093	LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
igorsk	0:b56b6a05cad4	1094	if (sc->sc_ethif != ifp) {
igorsk	0:b56b6a05cad4	1095	continue;
igorsk	0:b56b6a05cad4	1096	}
igorsk	0:b56b6a05cad4	1097	if (sc->sc_sppp.pp_if.if_flags & IFF_UP) {
igorsk	0:b56b6a05cad4	1098	sc->sc_sppp.pp_if.if_flags &= ~(IFF_UP\|IFF_RUNNING);
igorsk	0:b56b6a05cad4	1099	printf("%c%c%"U16_F": ethernet interface detached, going down\n",
igorsk	0:b56b6a05cad4	1100	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
igorsk	0:b56b6a05cad4	1101	}
igorsk	0:b56b6a05cad4	1102	sc->sc_ethif = NULL;
igorsk	0:b56b6a05cad4	1103	pppoe_clear_softc(sc, "ethernet interface detached");
igorsk	0:b56b6a05cad4	1104	}
igorsk	0:b56b6a05cad4	1105
igorsk	0:b56b6a05cad4	1106	return 0;
igorsk	0:b56b6a05cad4	1107	}
igorsk	0:b56b6a05cad4	1108	#endif
igorsk	0:b56b6a05cad4	1109
igorsk	0:b56b6a05cad4	1110	static void
igorsk	0:b56b6a05cad4	1111	pppoe_clear_softc(struct pppoe_softc sc, const char message)
igorsk	0:b56b6a05cad4	1112	{
igorsk	0:b56b6a05cad4	1113	LWIP_UNUSED_ARG(message);
igorsk	0:b56b6a05cad4	1114
igorsk	0:b56b6a05cad4	1115	/* stop timer */
igorsk	0:b56b6a05cad4	1116	sys_untimeout(pppoe_timeout, sc);
igorsk	0:b56b6a05cad4	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));
igorsk	0:b56b6a05cad4	1118
igorsk	0:b56b6a05cad4	1119	/* fix our state */
igorsk	0:b56b6a05cad4	1120	sc->sc_state = PPPOE_STATE_INITIAL;
igorsk	0:b56b6a05cad4	1121
igorsk	0:b56b6a05cad4	1122	/* notify upper layers */
igorsk	0:b56b6a05cad4	1123	sc->sc_linkStatusCB(sc->sc_pd, 0);
igorsk	0:b56b6a05cad4	1124
igorsk	0:b56b6a05cad4	1125	/* clean up softc */
igorsk	0:b56b6a05cad4	1126	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
igorsk	0:b56b6a05cad4	1127	sc->sc_ac_cookie_len = 0;
igorsk	0:b56b6a05cad4	1128	sc->sc_session = 0;
igorsk	0:b56b6a05cad4	1129	}
igorsk	0:b56b6a05cad4	1130
igorsk	0:b56b6a05cad4	1131	#endif /* PPPOE_SUPPORT */
igorsk	0:b56b6a05cad4	1132

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Type:	Program
Created:	29 Jun 2011
Imports:	167
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	3

lwip/netif/ppp/ppp_oe.c@0:b56b6a05cad4, 2011-06-29 (annotated)

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