NetServicesMod - Modified version of NetServices. Fixes an issue w…

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Modified version of NetServices. Fixes an issue where connections failed should the HTTP response status line be received in a packet on its own prior to any further headers. Changes are made to the HTTPClient.cpp file's readHeaders method.

lwip/netif/ppp/ppp_oe.c@0:ec559500a63f, 2011-04-08 (annotated)

Committer:: andrewbonney
Date:: Fri Apr 08 14:39:41 2011 +0000
Revision:: 0:ec559500a63f

Who changed what in which revision?

User	Revision	Line number	New contents of line
andrewbonney	0:ec559500a63f	1	/*****************************************************************************
andrewbonney	0:ec559500a63f	2	* ppp_oe.c - PPP Over Ethernet implementation for lwIP.
andrewbonney	0:ec559500a63f	3	*
andrewbonney	0:ec559500a63f	4	* Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc.
andrewbonney	0:ec559500a63f	5	*
andrewbonney	0:ec559500a63f	6	* The authors hereby grant permission to use, copy, modify, distribute,
andrewbonney	0:ec559500a63f	7	* and license this software and its documentation for any purpose, provided
andrewbonney	0:ec559500a63f	8	* that existing copyright notices are retained in all copies and that this
andrewbonney	0:ec559500a63f	9	* notice and the following disclaimer are included verbatim in any
andrewbonney	0:ec559500a63f	10	* distributions. No written agreement, license, or royalty fee is required
andrewbonney	0:ec559500a63f	11	* for any of the authorized uses.
andrewbonney	0:ec559500a63f	12	*
andrewbonney	0:ec559500a63f	13	* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS AS IS AND ANY EXPRESS OR
andrewbonney	0:ec559500a63f	14	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
andrewbonney	0:ec559500a63f	15	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
andrewbonney	0:ec559500a63f	16	* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
andrewbonney	0:ec559500a63f	17	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
andrewbonney	0:ec559500a63f	18	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
andrewbonney	0:ec559500a63f	19	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
andrewbonney	0:ec559500a63f	20	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
andrewbonney	0:ec559500a63f	21	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
andrewbonney	0:ec559500a63f	22	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
andrewbonney	0:ec559500a63f	23	*
andrewbonney	0:ec559500a63f	24	******************************************************************************
andrewbonney	0:ec559500a63f	25	* REVISION HISTORY
andrewbonney	0:ec559500a63f	26	*
andrewbonney	0:ec559500a63f	27	* 06-01-01 Marc Boucher <marc@mbsi.ca>
andrewbonney	0:ec559500a63f	28	* Ported to lwIP.
andrewbonney	0:ec559500a63f	29	*****************************************************************************/
andrewbonney	0:ec559500a63f	30
andrewbonney	0:ec559500a63f	31
andrewbonney	0:ec559500a63f	32
andrewbonney	0:ec559500a63f	33	/* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */
andrewbonney	0:ec559500a63f	34
andrewbonney	0:ec559500a63f	35	/*-
andrewbonney	0:ec559500a63f	36	* Copyright (c) 2002 The NetBSD Foundation, Inc.
andrewbonney	0:ec559500a63f	37	* All rights reserved.
andrewbonney	0:ec559500a63f	38	*
andrewbonney	0:ec559500a63f	39	* This code is derived from software contributed to The NetBSD Foundation
andrewbonney	0:ec559500a63f	40	* by Martin Husemann <martin@NetBSD.org>.
andrewbonney	0:ec559500a63f	41	*
andrewbonney	0:ec559500a63f	42	* Redistribution and use in source and binary forms, with or without
andrewbonney	0:ec559500a63f	43	* modification, are permitted provided that the following conditions
andrewbonney	0:ec559500a63f	44	* are met:
andrewbonney	0:ec559500a63f	45	* 1. Redistributions of source code must retain the above copyright
andrewbonney	0:ec559500a63f	46	* notice, this list of conditions and the following disclaimer.
andrewbonney	0:ec559500a63f	47	* 2. Redistributions in binary form must reproduce the above copyright
andrewbonney	0:ec559500a63f	48	* notice, this list of conditions and the following disclaimer in the
andrewbonney	0:ec559500a63f	49	* documentation and/or other materials provided with the distribution.
andrewbonney	0:ec559500a63f	50	* 3. All advertising materials mentioning features or use of this software
andrewbonney	0:ec559500a63f	51	* must display the following acknowledgement:
andrewbonney	0:ec559500a63f	52	* This product includes software developed by the NetBSD
andrewbonney	0:ec559500a63f	53	* Foundation, Inc. and its contributors.
andrewbonney	0:ec559500a63f	54	* 4. Neither the name of The NetBSD Foundation nor the names of its
andrewbonney	0:ec559500a63f	55	* contributors may be used to endorse or promote products derived
andrewbonney	0:ec559500a63f	56	* from this software without specific prior written permission.
andrewbonney	0:ec559500a63f	57	*
andrewbonney	0:ec559500a63f	58	* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
andrewbonney	0:ec559500a63f	59	* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
andrewbonney	0:ec559500a63f	60	* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
andrewbonney	0:ec559500a63f	61	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
andrewbonney	0:ec559500a63f	62	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
andrewbonney	0:ec559500a63f	63	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
andrewbonney	0:ec559500a63f	64	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
andrewbonney	0:ec559500a63f	65	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
andrewbonney	0:ec559500a63f	66	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
andrewbonney	0:ec559500a63f	67	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
andrewbonney	0:ec559500a63f	68	* POSSIBILITY OF SUCH DAMAGE.
andrewbonney	0:ec559500a63f	69	*/
andrewbonney	0:ec559500a63f	70
andrewbonney	0:ec559500a63f	71	#include "lwip/opt.h"
andrewbonney	0:ec559500a63f	72
andrewbonney	0:ec559500a63f	73	#if PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */
andrewbonney	0:ec559500a63f	74
andrewbonney	0:ec559500a63f	75	#include "netif/ppp_oe.h"
andrewbonney	0:ec559500a63f	76
andrewbonney	0:ec559500a63f	77	#include "ppp.h"
andrewbonney	0:ec559500a63f	78	#include "pppdebug.h"
andrewbonney	0:ec559500a63f	79
andrewbonney	0:ec559500a63f	80	#include "lwip/timers.h"
andrewbonney	0:ec559500a63f	81	#include "lwip/memp.h"
andrewbonney	0:ec559500a63f	82
andrewbonney	0:ec559500a63f	83	#include <string.h>
andrewbonney	0:ec559500a63f	84	#include <stdio.h>
andrewbonney	0:ec559500a63f	85
andrewbonney	0:ec559500a63f	86
andrewbonney	0:ec559500a63f	87	/* Add a 16 bit unsigned value to a buffer pointed to by PTR */
andrewbonney	0:ec559500a63f	88	#define PPPOE_ADD_16(PTR, VAL) \
andrewbonney	0:ec559500a63f	89	*(PTR)++ = (u8_t)((VAL) / 256); \
andrewbonney	0:ec559500a63f	90	*(PTR)++ = (u8_t)((VAL) % 256)
andrewbonney	0:ec559500a63f	91
andrewbonney	0:ec559500a63f	92	/* Add a complete PPPoE header to the buffer pointed to by PTR */
andrewbonney	0:ec559500a63f	93	#define PPPOE_ADD_HEADER(PTR, CODE, SESS, LEN) \
andrewbonney	0:ec559500a63f	94	*(PTR)++ = PPPOE_VERTYPE; \
andrewbonney	0:ec559500a63f	95	*(PTR)++ = (CODE); \
andrewbonney	0:ec559500a63f	96	PPPOE_ADD_16(PTR, SESS); \
andrewbonney	0:ec559500a63f	97	PPPOE_ADD_16(PTR, LEN)
andrewbonney	0:ec559500a63f	98
andrewbonney	0:ec559500a63f	99	#define PPPOE_DISC_TIMEOUT (51000) / base for quick timeout calculation */
andrewbonney	0:ec559500a63f	100	#define PPPOE_SLOW_RETRY (601000) / persistent retry interval */
andrewbonney	0:ec559500a63f	101	#define PPPOE_DISC_MAXPADI 4 /* retry PADI four times (quickly) */
andrewbonney	0:ec559500a63f	102	#define PPPOE_DISC_MAXPADR 2 /* retry PADR twice */
andrewbonney	0:ec559500a63f	103
andrewbonney	0:ec559500a63f	104	#ifdef PPPOE_SERVER
andrewbonney	0:ec559500a63f	105	#error "PPPOE_SERVER is not yet supported under lwIP!"
andrewbonney	0:ec559500a63f	106	/* from if_spppsubr.c */
andrewbonney	0:ec559500a63f	107	#define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
andrewbonney	0:ec559500a63f	108	#endif
andrewbonney	0:ec559500a63f	109
andrewbonney	0:ec559500a63f	110	#ifndef PPPOE_ERRORSTRING_LEN
andrewbonney	0:ec559500a63f	111	#define PPPOE_ERRORSTRING_LEN 64
andrewbonney	0:ec559500a63f	112	#endif
andrewbonney	0:ec559500a63f	113	static char pppoe_error_tmp[PPPOE_ERRORSTRING_LEN];
andrewbonney	0:ec559500a63f	114
andrewbonney	0:ec559500a63f	115
andrewbonney	0:ec559500a63f	116	/* input routines */
andrewbonney	0:ec559500a63f	117	static void pppoe_dispatch_disc_pkt(struct netif , struct pbuf );
andrewbonney	0:ec559500a63f	118
andrewbonney	0:ec559500a63f	119	/* management routines */
andrewbonney	0:ec559500a63f	120	static int pppoe_do_disconnect(struct pppoe_softc *);
andrewbonney	0:ec559500a63f	121	static void pppoe_abort_connect(struct pppoe_softc *);
andrewbonney	0:ec559500a63f	122	static void pppoe_clear_softc(struct pppoe_softc , const char );
andrewbonney	0:ec559500a63f	123
andrewbonney	0:ec559500a63f	124	/* internal timeout handling */
andrewbonney	0:ec559500a63f	125	static void pppoe_timeout(void *);
andrewbonney	0:ec559500a63f	126
andrewbonney	0:ec559500a63f	127	/* sending actual protocol controll packets */
andrewbonney	0:ec559500a63f	128	static err_t pppoe_send_padi(struct pppoe_softc *);
andrewbonney	0:ec559500a63f	129	static err_t pppoe_send_padr(struct pppoe_softc *);
andrewbonney	0:ec559500a63f	130	#ifdef PPPOE_SERVER
andrewbonney	0:ec559500a63f	131	static err_t pppoe_send_pado(struct pppoe_softc *);
andrewbonney	0:ec559500a63f	132	static err_t pppoe_send_pads(struct pppoe_softc *);
andrewbonney	0:ec559500a63f	133	#endif
andrewbonney	0:ec559500a63f	134	static err_t pppoe_send_padt(struct netif , u_int, const u8_t );
andrewbonney	0:ec559500a63f	135
andrewbonney	0:ec559500a63f	136	/* internal helper functions */
andrewbonney	0:ec559500a63f	137	static struct pppoe_softc * pppoe_find_softc_by_session(u_int, struct netif *);
andrewbonney	0:ec559500a63f	138	static struct pppoe_softc * pppoe_find_softc_by_hunique(u8_t , size_t, struct netif );
andrewbonney	0:ec559500a63f	139
andrewbonney	0:ec559500a63f	140	/** linked list of created pppoe interfaces */
andrewbonney	0:ec559500a63f	141	static struct pppoe_softc *pppoe_softc_list;
andrewbonney	0:ec559500a63f	142
andrewbonney	0:ec559500a63f	143	err_t
andrewbonney	0:ec559500a63f	144	pppoe_create(struct netif ethif, int pd, void (linkStatusCB)(int pd, int up), struct pppoe_softc **scptr)
andrewbonney	0:ec559500a63f	145	{
andrewbonney	0:ec559500a63f	146	struct pppoe_softc *sc;
andrewbonney	0:ec559500a63f	147
andrewbonney	0:ec559500a63f	148	sc = (struct pppoe_softc *)memp_malloc(MEMP_PPPOE_IF);
andrewbonney	0:ec559500a63f	149	if (sc == NULL) {
andrewbonney	0:ec559500a63f	150	*scptr = NULL;
andrewbonney	0:ec559500a63f	151	return ERR_MEM;
andrewbonney	0:ec559500a63f	152	}
andrewbonney	0:ec559500a63f	153	memset(sc, 0, sizeof(struct pppoe_softc));
andrewbonney	0:ec559500a63f	154
andrewbonney	0:ec559500a63f	155	/* changed to real address later */
andrewbonney	0:ec559500a63f	156	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
andrewbonney	0:ec559500a63f	157
andrewbonney	0:ec559500a63f	158	sc->sc_pd = pd;
andrewbonney	0:ec559500a63f	159	sc->sc_linkStatusCB = linkStatusCB;
andrewbonney	0:ec559500a63f	160	sc->sc_ethif = ethif;
andrewbonney	0:ec559500a63f	161
andrewbonney	0:ec559500a63f	162	/* put the new interface at the head of the list */
andrewbonney	0:ec559500a63f	163	sc->next = pppoe_softc_list;
andrewbonney	0:ec559500a63f	164	pppoe_softc_list = sc;
andrewbonney	0:ec559500a63f	165
andrewbonney	0:ec559500a63f	166	*scptr = sc;
andrewbonney	0:ec559500a63f	167
andrewbonney	0:ec559500a63f	168	return ERR_OK;
andrewbonney	0:ec559500a63f	169	}
andrewbonney	0:ec559500a63f	170
andrewbonney	0:ec559500a63f	171	err_t
andrewbonney	0:ec559500a63f	172	pppoe_destroy(struct netif *ifp)
andrewbonney	0:ec559500a63f	173	{
andrewbonney	0:ec559500a63f	174	struct pppoe_softc sc, prev = NULL;
andrewbonney	0:ec559500a63f	175
andrewbonney	0:ec559500a63f	176	for (sc = pppoe_softc_list; sc != NULL; prev = sc, sc = sc->next) {
andrewbonney	0:ec559500a63f	177	if (sc->sc_ethif == ifp) {
andrewbonney	0:ec559500a63f	178	break;
andrewbonney	0:ec559500a63f	179	}
andrewbonney	0:ec559500a63f	180	}
andrewbonney	0:ec559500a63f	181
andrewbonney	0:ec559500a63f	182	if(!(sc && (sc->sc_ethif == ifp))) {
andrewbonney	0:ec559500a63f	183	return ERR_IF;
andrewbonney	0:ec559500a63f	184	}
andrewbonney	0:ec559500a63f	185
andrewbonney	0:ec559500a63f	186	sys_untimeout(pppoe_timeout, sc);
andrewbonney	0:ec559500a63f	187	if (prev == NULL) {
andrewbonney	0:ec559500a63f	188	/* remove sc from the head of the list */
andrewbonney	0:ec559500a63f	189	pppoe_softc_list = sc->next;
andrewbonney	0:ec559500a63f	190	} else {
andrewbonney	0:ec559500a63f	191	/* remove sc from the list */
andrewbonney	0:ec559500a63f	192	prev->next = sc->next;
andrewbonney	0:ec559500a63f	193	}
andrewbonney	0:ec559500a63f	194
andrewbonney	0:ec559500a63f	195	#ifdef PPPOE_TODO
andrewbonney	0:ec559500a63f	196	if (sc->sc_concentrator_name) {
andrewbonney	0:ec559500a63f	197	mem_free(sc->sc_concentrator_name);
andrewbonney	0:ec559500a63f	198	}
andrewbonney	0:ec559500a63f	199	if (sc->sc_service_name) {
andrewbonney	0:ec559500a63f	200	mem_free(sc->sc_service_name);
andrewbonney	0:ec559500a63f	201	}
andrewbonney	0:ec559500a63f	202	#endif /* PPPOE_TODO */
andrewbonney	0:ec559500a63f	203	memp_free(MEMP_PPPOE_IF, sc);
andrewbonney	0:ec559500a63f	204
andrewbonney	0:ec559500a63f	205	return ERR_OK;
andrewbonney	0:ec559500a63f	206	}
andrewbonney	0:ec559500a63f	207
andrewbonney	0:ec559500a63f	208	/*
andrewbonney	0:ec559500a63f	209	* Find the interface handling the specified session.
andrewbonney	0:ec559500a63f	210	* Note: O(number of sessions open), this is a client-side only, mean
andrewbonney	0:ec559500a63f	211	* and lean implementation, so number of open sessions typically should
andrewbonney	0:ec559500a63f	212	* be 1.
andrewbonney	0:ec559500a63f	213	*/
andrewbonney	0:ec559500a63f	214	static struct pppoe_softc *
andrewbonney	0:ec559500a63f	215	pppoe_find_softc_by_session(u_int session, struct netif *rcvif)
andrewbonney	0:ec559500a63f	216	{
andrewbonney	0:ec559500a63f	217	struct pppoe_softc *sc;
andrewbonney	0:ec559500a63f	218
andrewbonney	0:ec559500a63f	219	if (session == 0) {
andrewbonney	0:ec559500a63f	220	return NULL;
andrewbonney	0:ec559500a63f	221	}
andrewbonney	0:ec559500a63f	222
andrewbonney	0:ec559500a63f	223	for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
andrewbonney	0:ec559500a63f	224	if (sc->sc_state == PPPOE_STATE_SESSION
andrewbonney	0:ec559500a63f	225	&& sc->sc_session == session) {
andrewbonney	0:ec559500a63f	226	if (sc->sc_ethif == rcvif) {
andrewbonney	0:ec559500a63f	227	return sc;
andrewbonney	0:ec559500a63f	228	} else {
andrewbonney	0:ec559500a63f	229	return NULL;
andrewbonney	0:ec559500a63f	230	}
andrewbonney	0:ec559500a63f	231	}
andrewbonney	0:ec559500a63f	232	}
andrewbonney	0:ec559500a63f	233	return NULL;
andrewbonney	0:ec559500a63f	234	}
andrewbonney	0:ec559500a63f	235
andrewbonney	0:ec559500a63f	236	/* Check host unique token passed and return appropriate softc pointer,
andrewbonney	0:ec559500a63f	237	* or NULL if token is bogus. */
andrewbonney	0:ec559500a63f	238	static struct pppoe_softc *
andrewbonney	0:ec559500a63f	239	pppoe_find_softc_by_hunique(u8_t token, size_t len, struct netif rcvif)
andrewbonney	0:ec559500a63f	240	{
andrewbonney	0:ec559500a63f	241	struct pppoe_softc sc, t;
andrewbonney	0:ec559500a63f	242
andrewbonney	0:ec559500a63f	243	if (pppoe_softc_list == NULL) {
andrewbonney	0:ec559500a63f	244	return NULL;
andrewbonney	0:ec559500a63f	245	}
andrewbonney	0:ec559500a63f	246
andrewbonney	0:ec559500a63f	247	if (len != sizeof sc) {
andrewbonney	0:ec559500a63f	248	return NULL;
andrewbonney	0:ec559500a63f	249	}
andrewbonney	0:ec559500a63f	250	MEMCPY(&t, token, len);
andrewbonney	0:ec559500a63f	251
andrewbonney	0:ec559500a63f	252	for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
andrewbonney	0:ec559500a63f	253	if (sc == t) {
andrewbonney	0:ec559500a63f	254	break;
andrewbonney	0:ec559500a63f	255	}
andrewbonney	0:ec559500a63f	256	}
andrewbonney	0:ec559500a63f	257
andrewbonney	0:ec559500a63f	258	if (sc == NULL) {
andrewbonney	0:ec559500a63f	259	PPPDEBUG(LOG_DEBUG, ("pppoe: alien host unique tag, no session found\n"));
andrewbonney	0:ec559500a63f	260	return NULL;
andrewbonney	0:ec559500a63f	261	}
andrewbonney	0:ec559500a63f	262
andrewbonney	0:ec559500a63f	263	/* should be safe to access sc now /
andrewbonney	0:ec559500a63f	264	if (sc->sc_state < PPPOE_STATE_PADI_SENT \|\| sc->sc_state >= PPPOE_STATE_SESSION) {
andrewbonney	0:ec559500a63f	265	printf("%c%c%"U16_F": host unique tag found, but it belongs to a connection in state %d\n",
andrewbonney	0:ec559500a63f	266	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_state);
andrewbonney	0:ec559500a63f	267	return NULL;
andrewbonney	0:ec559500a63f	268	}
andrewbonney	0:ec559500a63f	269	if (sc->sc_ethif != rcvif) {
andrewbonney	0:ec559500a63f	270	printf("%c%c%"U16_F": wrong interface, not accepting host unique\n",
andrewbonney	0:ec559500a63f	271	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
andrewbonney	0:ec559500a63f	272	return NULL;
andrewbonney	0:ec559500a63f	273	}
andrewbonney	0:ec559500a63f	274	return sc;
andrewbonney	0:ec559500a63f	275	}
andrewbonney	0:ec559500a63f	276
andrewbonney	0:ec559500a63f	277	static void
andrewbonney	0:ec559500a63f	278	pppoe_linkstatus_up(struct pppoe_softc *sc)
andrewbonney	0:ec559500a63f	279	{
andrewbonney	0:ec559500a63f	280	sc->sc_linkStatusCB(sc->sc_pd, 1);
andrewbonney	0:ec559500a63f	281	}
andrewbonney	0:ec559500a63f	282
andrewbonney	0:ec559500a63f	283	/* analyze and handle a single received packet while not in session state */
andrewbonney	0:ec559500a63f	284	static void
andrewbonney	0:ec559500a63f	285	pppoe_dispatch_disc_pkt(struct netif netif, struct pbuf pb)
andrewbonney	0:ec559500a63f	286	{
andrewbonney	0:ec559500a63f	287	u16_t tag, len;
andrewbonney	0:ec559500a63f	288	u16_t session, plen;
andrewbonney	0:ec559500a63f	289	struct pppoe_softc *sc;
andrewbonney	0:ec559500a63f	290	const char *err_msg;
andrewbonney	0:ec559500a63f	291	char devname[6];
andrewbonney	0:ec559500a63f	292	u8_t *ac_cookie;
andrewbonney	0:ec559500a63f	293	u16_t ac_cookie_len;
andrewbonney	0:ec559500a63f	294	#ifdef PPPOE_SERVER
andrewbonney	0:ec559500a63f	295	u8_t *hunique;
andrewbonney	0:ec559500a63f	296	size_t hunique_len;
andrewbonney	0:ec559500a63f	297	#endif
andrewbonney	0:ec559500a63f	298	struct pppoehdr *ph;
andrewbonney	0:ec559500a63f	299	struct pppoetag pt;
andrewbonney	0:ec559500a63f	300	int off, err, errortag;
andrewbonney	0:ec559500a63f	301	struct eth_hdr *ethhdr;
andrewbonney	0:ec559500a63f	302
andrewbonney	0:ec559500a63f	303	pb = pppSingleBuf(pb);
andrewbonney	0:ec559500a63f	304
andrewbonney	0:ec559500a63f	305	strcpy(devname, "pppoe"); /* as long as we don't know which instance */
andrewbonney	0:ec559500a63f	306	err_msg = NULL;
andrewbonney	0:ec559500a63f	307	errortag = 0;
andrewbonney	0:ec559500a63f	308	if (pb->len < sizeof(*ethhdr)) {
andrewbonney	0:ec559500a63f	309	goto done;
andrewbonney	0:ec559500a63f	310	}
andrewbonney	0:ec559500a63f	311	ethhdr = (struct eth_hdr *)pb->payload;
andrewbonney	0:ec559500a63f	312	off = sizeof(*ethhdr);
andrewbonney	0:ec559500a63f	313
andrewbonney	0:ec559500a63f	314	ac_cookie = NULL;
andrewbonney	0:ec559500a63f	315	ac_cookie_len = 0;
andrewbonney	0:ec559500a63f	316	#ifdef PPPOE_SERVER
andrewbonney	0:ec559500a63f	317	hunique = NULL;
andrewbonney	0:ec559500a63f	318	hunique_len = 0;
andrewbonney	0:ec559500a63f	319	#endif
andrewbonney	0:ec559500a63f	320	session = 0;
andrewbonney	0:ec559500a63f	321	if (pb->len - off < PPPOE_HEADERLEN) {
andrewbonney	0:ec559500a63f	322	printf("pppoe: packet too short: %d\n", pb->len);
andrewbonney	0:ec559500a63f	323	goto done;
andrewbonney	0:ec559500a63f	324	}
andrewbonney	0:ec559500a63f	325
andrewbonney	0:ec559500a63f	326	ph = (struct pppoehdr *) (ethhdr + 1);
andrewbonney	0:ec559500a63f	327	if (ph->vertype != PPPOE_VERTYPE) {
andrewbonney	0:ec559500a63f	328	printf("pppoe: unknown version/type packet: 0x%x\n", ph->vertype);
andrewbonney	0:ec559500a63f	329	goto done;
andrewbonney	0:ec559500a63f	330	}
andrewbonney	0:ec559500a63f	331	session = ntohs(ph->session);
andrewbonney	0:ec559500a63f	332	plen = ntohs(ph->plen);
andrewbonney	0:ec559500a63f	333	off += sizeof(*ph);
andrewbonney	0:ec559500a63f	334
andrewbonney	0:ec559500a63f	335	if (plen + off > pb->len) {
andrewbonney	0:ec559500a63f	336	printf("pppoe: packet content does not fit: data available = %d, packet size = %u\n",
andrewbonney	0:ec559500a63f	337	pb->len - off, plen);
andrewbonney	0:ec559500a63f	338	goto done;
andrewbonney	0:ec559500a63f	339	}
andrewbonney	0:ec559500a63f	340	if(pb->tot_len == pb->len) {
andrewbonney	0:ec559500a63f	341	pb->tot_len = pb->len = (u16_t)off + plen; /* ignore trailing garbage */
andrewbonney	0:ec559500a63f	342	}
andrewbonney	0:ec559500a63f	343	tag = 0;
andrewbonney	0:ec559500a63f	344	len = 0;
andrewbonney	0:ec559500a63f	345	sc = NULL;
andrewbonney	0:ec559500a63f	346	while (off + sizeof(pt) <= pb->len) {
andrewbonney	0:ec559500a63f	347	MEMCPY(&pt, (u8_t*)pb->payload + off, sizeof(pt));
andrewbonney	0:ec559500a63f	348	tag = ntohs(pt.tag);
andrewbonney	0:ec559500a63f	349	len = ntohs(pt.len);
andrewbonney	0:ec559500a63f	350	if (off + sizeof(pt) + len > pb->len) {
andrewbonney	0:ec559500a63f	351	printf("pppoe: tag 0x%x len 0x%x is too long\n", tag, len);
andrewbonney	0:ec559500a63f	352	goto done;
andrewbonney	0:ec559500a63f	353	}
andrewbonney	0:ec559500a63f	354	switch (tag) {
andrewbonney	0:ec559500a63f	355	case PPPOE_TAG_EOL:
andrewbonney	0:ec559500a63f	356	goto breakbreak;
andrewbonney	0:ec559500a63f	357	case PPPOE_TAG_SNAME:
andrewbonney	0:ec559500a63f	358	break; /* ignored */
andrewbonney	0:ec559500a63f	359	case PPPOE_TAG_ACNAME:
andrewbonney	0:ec559500a63f	360	break; /* ignored */
andrewbonney	0:ec559500a63f	361	case PPPOE_TAG_HUNIQUE:
andrewbonney	0:ec559500a63f	362	if (sc != NULL) {
andrewbonney	0:ec559500a63f	363	break;
andrewbonney	0:ec559500a63f	364	}
andrewbonney	0:ec559500a63f	365	#ifdef PPPOE_SERVER
andrewbonney	0:ec559500a63f	366	hunique = (u8_t*)pb->payload + off + sizeof(pt);
andrewbonney	0:ec559500a63f	367	hunique_len = len;
andrewbonney	0:ec559500a63f	368	#endif
andrewbonney	0:ec559500a63f	369	sc = pppoe_find_softc_by_hunique((u8_t*)pb->payload + off + sizeof(pt), len, netif);
andrewbonney	0:ec559500a63f	370	if (sc != NULL) {
andrewbonney	0:ec559500a63f	371	snprintf(devname, sizeof(devname), "%c%c%"U16_F, sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
andrewbonney	0:ec559500a63f	372	}
andrewbonney	0:ec559500a63f	373	break;
andrewbonney	0:ec559500a63f	374	case PPPOE_TAG_ACCOOKIE:
andrewbonney	0:ec559500a63f	375	if (ac_cookie == NULL) {
andrewbonney	0:ec559500a63f	376	ac_cookie = (u8_t*)pb->payload + off + sizeof(pt);
andrewbonney	0:ec559500a63f	377	ac_cookie_len = len;
andrewbonney	0:ec559500a63f	378	}
andrewbonney	0:ec559500a63f	379	break;
andrewbonney	0:ec559500a63f	380	case PPPOE_TAG_SNAME_ERR:
andrewbonney	0:ec559500a63f	381	err_msg = "SERVICE NAME ERROR";
andrewbonney	0:ec559500a63f	382	errortag = 1;
andrewbonney	0:ec559500a63f	383	break;
andrewbonney	0:ec559500a63f	384	case PPPOE_TAG_ACSYS_ERR:
andrewbonney	0:ec559500a63f	385	err_msg = "AC SYSTEM ERROR";
andrewbonney	0:ec559500a63f	386	errortag = 1;
andrewbonney	0:ec559500a63f	387	break;
andrewbonney	0:ec559500a63f	388	case PPPOE_TAG_GENERIC_ERR:
andrewbonney	0:ec559500a63f	389	err_msg = "GENERIC ERROR";
andrewbonney	0:ec559500a63f	390	errortag = 1;
andrewbonney	0:ec559500a63f	391	break;
andrewbonney	0:ec559500a63f	392	}
andrewbonney	0:ec559500a63f	393	if (err_msg) {
andrewbonney	0:ec559500a63f	394	if (errortag && len) {
andrewbonney	0:ec559500a63f	395	u16_t error_len = LWIP_MIN(len, sizeof(pppoe_error_tmp)-1);
andrewbonney	0:ec559500a63f	396	strncpy(pppoe_error_tmp, (char*)pb->payload + off + sizeof(pt), error_len);
andrewbonney	0:ec559500a63f	397	pppoe_error_tmp[error_len-1] = '\0';
andrewbonney	0:ec559500a63f	398	printf("%s: %s: %s\n", devname, err_msg, pppoe_error_tmp);
andrewbonney	0:ec559500a63f	399	} else {
andrewbonney	0:ec559500a63f	400	printf("%s: %s\n", devname, err_msg);
andrewbonney	0:ec559500a63f	401	}
andrewbonney	0:ec559500a63f	402	if (errortag) {
andrewbonney	0:ec559500a63f	403	goto done;
andrewbonney	0:ec559500a63f	404	}
andrewbonney	0:ec559500a63f	405	}
andrewbonney	0:ec559500a63f	406	off += sizeof(pt) + len;
andrewbonney	0:ec559500a63f	407	}
andrewbonney	0:ec559500a63f	408
andrewbonney	0:ec559500a63f	409	breakbreak:;
andrewbonney	0:ec559500a63f	410	switch (ph->code) {
andrewbonney	0:ec559500a63f	411	case PPPOE_CODE_PADI:
andrewbonney	0:ec559500a63f	412	#ifdef PPPOE_SERVER
andrewbonney	0:ec559500a63f	413	/*
andrewbonney	0:ec559500a63f	414	* got service name, concentrator name, and/or host unique.
andrewbonney	0:ec559500a63f	415	* ignore if we have no interfaces with IFF_PASSIVE\|IFF_UP.
andrewbonney	0:ec559500a63f	416	*/
andrewbonney	0:ec559500a63f	417	if (LIST_EMPTY(&pppoe_softc_list)) {
andrewbonney	0:ec559500a63f	418	goto done;
andrewbonney	0:ec559500a63f	419	}
andrewbonney	0:ec559500a63f	420	LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
andrewbonney	0:ec559500a63f	421	if (!(sc->sc_sppp.pp_if.if_flags & IFF_UP)) {
andrewbonney	0:ec559500a63f	422	continue;
andrewbonney	0:ec559500a63f	423	}
andrewbonney	0:ec559500a63f	424	if (!(sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
andrewbonney	0:ec559500a63f	425	continue;
andrewbonney	0:ec559500a63f	426	}
andrewbonney	0:ec559500a63f	427	if (sc->sc_state == PPPOE_STATE_INITIAL) {
andrewbonney	0:ec559500a63f	428	break;
andrewbonney	0:ec559500a63f	429	}
andrewbonney	0:ec559500a63f	430	}
andrewbonney	0:ec559500a63f	431	if (sc == NULL) {
andrewbonney	0:ec559500a63f	432	/* printf("pppoe: free passive interface is not found\n"); */
andrewbonney	0:ec559500a63f	433	goto done;
andrewbonney	0:ec559500a63f	434	}
andrewbonney	0:ec559500a63f	435	if (hunique) {
andrewbonney	0:ec559500a63f	436	if (sc->sc_hunique) {
andrewbonney	0:ec559500a63f	437	mem_free(sc->sc_hunique);
andrewbonney	0:ec559500a63f	438	}
andrewbonney	0:ec559500a63f	439	sc->sc_hunique = mem_malloc(hunique_len);
andrewbonney	0:ec559500a63f	440	if (sc->sc_hunique == NULL) {
andrewbonney	0:ec559500a63f	441	goto done;
andrewbonney	0:ec559500a63f	442	}
andrewbonney	0:ec559500a63f	443	sc->sc_hunique_len = hunique_len;
andrewbonney	0:ec559500a63f	444	MEMCPY(sc->sc_hunique, hunique, hunique_len);
andrewbonney	0:ec559500a63f	445	}
andrewbonney	0:ec559500a63f	446	MEMCPY(&sc->sc_dest, eh->ether_shost, sizeof sc->sc_dest);
andrewbonney	0:ec559500a63f	447	sc->sc_state = PPPOE_STATE_PADO_SENT;
andrewbonney	0:ec559500a63f	448	pppoe_send_pado(sc);
andrewbonney	0:ec559500a63f	449	break;
andrewbonney	0:ec559500a63f	450	#endif /* PPPOE_SERVER */
andrewbonney	0:ec559500a63f	451	case PPPOE_CODE_PADR:
andrewbonney	0:ec559500a63f	452	#ifdef PPPOE_SERVER
andrewbonney	0:ec559500a63f	453	/*
andrewbonney	0:ec559500a63f	454	* get sc from ac_cookie if IFF_PASSIVE
andrewbonney	0:ec559500a63f	455	*/
andrewbonney	0:ec559500a63f	456	if (ac_cookie == NULL) {
andrewbonney	0:ec559500a63f	457	/* be quiet if there is not a single pppoe instance */
andrewbonney	0:ec559500a63f	458	printf("pppoe: received PADR but not includes ac_cookie\n");
andrewbonney	0:ec559500a63f	459	goto done;
andrewbonney	0:ec559500a63f	460	}
andrewbonney	0:ec559500a63f	461	sc = pppoe_find_softc_by_hunique(ac_cookie, ac_cookie_len, netif);
andrewbonney	0:ec559500a63f	462	if (sc == NULL) {
andrewbonney	0:ec559500a63f	463	/* be quiet if there is not a single pppoe instance */
andrewbonney	0:ec559500a63f	464	if (!LIST_EMPTY(&pppoe_softc_list)) {
andrewbonney	0:ec559500a63f	465	printf("pppoe: received PADR but could not find request for it\n");
andrewbonney	0:ec559500a63f	466	}
andrewbonney	0:ec559500a63f	467	goto done;
andrewbonney	0:ec559500a63f	468	}
andrewbonney	0:ec559500a63f	469	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
andrewbonney	0:ec559500a63f	470	printf("%c%c%"U16_F": received unexpected PADR\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
andrewbonney	0:ec559500a63f	471	goto done;
andrewbonney	0:ec559500a63f	472	}
andrewbonney	0:ec559500a63f	473	if (hunique) {
andrewbonney	0:ec559500a63f	474	if (sc->sc_hunique) {
andrewbonney	0:ec559500a63f	475	mem_free(sc->sc_hunique);
andrewbonney	0:ec559500a63f	476	}
andrewbonney	0:ec559500a63f	477	sc->sc_hunique = mem_malloc(hunique_len);
andrewbonney	0:ec559500a63f	478	if (sc->sc_hunique == NULL) {
andrewbonney	0:ec559500a63f	479	goto done;
andrewbonney	0:ec559500a63f	480	}
andrewbonney	0:ec559500a63f	481	sc->sc_hunique_len = hunique_len;
andrewbonney	0:ec559500a63f	482	MEMCPY(sc->sc_hunique, hunique, hunique_len);
andrewbonney	0:ec559500a63f	483	}
andrewbonney	0:ec559500a63f	484	pppoe_send_pads(sc);
andrewbonney	0:ec559500a63f	485	sc->sc_state = PPPOE_STATE_SESSION;
andrewbonney	0:ec559500a63f	486	pppoe_linkstatus_up(sc); /* notify upper layers */
andrewbonney	0:ec559500a63f	487	break;
andrewbonney	0:ec559500a63f	488	#else
andrewbonney	0:ec559500a63f	489	/* ignore, we are no access concentrator */
andrewbonney	0:ec559500a63f	490	goto done;
andrewbonney	0:ec559500a63f	491	#endif /* PPPOE_SERVER */
andrewbonney	0:ec559500a63f	492	case PPPOE_CODE_PADO:
andrewbonney	0:ec559500a63f	493	if (sc == NULL) {
andrewbonney	0:ec559500a63f	494	/* be quiet if there is not a single pppoe instance */
andrewbonney	0:ec559500a63f	495	if (pppoe_softc_list != NULL) {
andrewbonney	0:ec559500a63f	496	printf("pppoe: received PADO but could not find request for it\n");
andrewbonney	0:ec559500a63f	497	}
andrewbonney	0:ec559500a63f	498	goto done;
andrewbonney	0:ec559500a63f	499	}
andrewbonney	0:ec559500a63f	500	if (sc->sc_state != PPPOE_STATE_PADI_SENT) {
andrewbonney	0:ec559500a63f	501	printf("%c%c%"U16_F": received unexpected PADO\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
andrewbonney	0:ec559500a63f	502	goto done;
andrewbonney	0:ec559500a63f	503	}
andrewbonney	0:ec559500a63f	504	if (ac_cookie) {
andrewbonney	0:ec559500a63f	505	sc->sc_ac_cookie_len = ac_cookie_len;
andrewbonney	0:ec559500a63f	506	MEMCPY(sc->sc_ac_cookie, ac_cookie, ac_cookie_len);
andrewbonney	0:ec559500a63f	507	}
andrewbonney	0:ec559500a63f	508	MEMCPY(&sc->sc_dest, ethhdr->src.addr, sizeof(sc->sc_dest.addr));
andrewbonney	0:ec559500a63f	509	sys_untimeout(pppoe_timeout, sc);
andrewbonney	0:ec559500a63f	510	sc->sc_padr_retried = 0;
andrewbonney	0:ec559500a63f	511	sc->sc_state = PPPOE_STATE_PADR_SENT;
andrewbonney	0:ec559500a63f	512	if ((err = pppoe_send_padr(sc)) != 0) {
andrewbonney	0:ec559500a63f	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));
andrewbonney	0:ec559500a63f	514	}
andrewbonney	0:ec559500a63f	515	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
andrewbonney	0:ec559500a63f	516	break;
andrewbonney	0:ec559500a63f	517	case PPPOE_CODE_PADS:
andrewbonney	0:ec559500a63f	518	if (sc == NULL) {
andrewbonney	0:ec559500a63f	519	goto done;
andrewbonney	0:ec559500a63f	520	}
andrewbonney	0:ec559500a63f	521	sc->sc_session = session;
andrewbonney	0:ec559500a63f	522	sys_untimeout(pppoe_timeout, sc);
andrewbonney	0:ec559500a63f	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));
andrewbonney	0:ec559500a63f	524	sc->sc_state = PPPOE_STATE_SESSION;
andrewbonney	0:ec559500a63f	525	pppoe_linkstatus_up(sc); /* notify upper layers */
andrewbonney	0:ec559500a63f	526	break;
andrewbonney	0:ec559500a63f	527	case PPPOE_CODE_PADT:
andrewbonney	0:ec559500a63f	528	if (sc == NULL) {
andrewbonney	0:ec559500a63f	529	goto done;
andrewbonney	0:ec559500a63f	530	}
andrewbonney	0:ec559500a63f	531	pppoe_clear_softc(sc, "received PADT");
andrewbonney	0:ec559500a63f	532	break;
andrewbonney	0:ec559500a63f	533	default:
andrewbonney	0:ec559500a63f	534	if(sc) {
andrewbonney	0:ec559500a63f	535	printf("%c%c%"U16_F": unknown code (0x%"X16_F") session = 0x%"X16_F"\n",
andrewbonney	0:ec559500a63f	536	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
andrewbonney	0:ec559500a63f	537	(u16_t)ph->code, session);
andrewbonney	0:ec559500a63f	538	} else {
andrewbonney	0:ec559500a63f	539	printf("pppoe: unknown code (0x%"X16_F") session = 0x%"X16_F"\n", (u16_t)ph->code, session);
andrewbonney	0:ec559500a63f	540	}
andrewbonney	0:ec559500a63f	541	break;
andrewbonney	0:ec559500a63f	542	}
andrewbonney	0:ec559500a63f	543
andrewbonney	0:ec559500a63f	544	done:
andrewbonney	0:ec559500a63f	545	pbuf_free(pb);
andrewbonney	0:ec559500a63f	546	return;
andrewbonney	0:ec559500a63f	547	}
andrewbonney	0:ec559500a63f	548
andrewbonney	0:ec559500a63f	549	void
andrewbonney	0:ec559500a63f	550	pppoe_disc_input(struct netif netif, struct pbuf p)
andrewbonney	0:ec559500a63f	551	{
andrewbonney	0:ec559500a63f	552	/* avoid error messages if there is not a single pppoe instance */
andrewbonney	0:ec559500a63f	553	if (pppoe_softc_list != NULL) {
andrewbonney	0:ec559500a63f	554	pppoe_dispatch_disc_pkt(netif, p);
andrewbonney	0:ec559500a63f	555	} else {
andrewbonney	0:ec559500a63f	556	pbuf_free(p);
andrewbonney	0:ec559500a63f	557	}
andrewbonney	0:ec559500a63f	558	}
andrewbonney	0:ec559500a63f	559
andrewbonney	0:ec559500a63f	560	void
andrewbonney	0:ec559500a63f	561	pppoe_data_input(struct netif netif, struct pbuf pb)
andrewbonney	0:ec559500a63f	562	{
andrewbonney	0:ec559500a63f	563	u16_t session, plen;
andrewbonney	0:ec559500a63f	564	struct pppoe_softc *sc;
andrewbonney	0:ec559500a63f	565	struct pppoehdr *ph;
andrewbonney	0:ec559500a63f	566	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
andrewbonney	0:ec559500a63f	567	u8_t shost[ETHER_ADDR_LEN];
andrewbonney	0:ec559500a63f	568	#endif
andrewbonney	0:ec559500a63f	569
andrewbonney	0:ec559500a63f	570	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
andrewbonney	0:ec559500a63f	571	MEMCPY(shost, ((struct eth_hdr *)pb->payload)->src.addr, sizeof(shost));
andrewbonney	0:ec559500a63f	572	#endif
andrewbonney	0:ec559500a63f	573	if (pbuf_header(pb, -(int)sizeof(struct eth_hdr)) != 0) {
andrewbonney	0:ec559500a63f	574	/* bail out */
andrewbonney	0:ec559500a63f	575	PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header failed\n"));
andrewbonney	0:ec559500a63f	576	LINK_STATS_INC(link.lenerr);
andrewbonney	0:ec559500a63f	577	goto drop;
andrewbonney	0:ec559500a63f	578	}
andrewbonney	0:ec559500a63f	579
andrewbonney	0:ec559500a63f	580	pb = pppSingleBuf (pb);
andrewbonney	0:ec559500a63f	581
andrewbonney	0:ec559500a63f	582	if (pb->len <= PPPOE_HEADERLEN) {
andrewbonney	0:ec559500a63f	583	printf("pppoe (data): dropping too short packet: %d bytes\n", pb->len);
andrewbonney	0:ec559500a63f	584	goto drop;
andrewbonney	0:ec559500a63f	585	}
andrewbonney	0:ec559500a63f	586
andrewbonney	0:ec559500a63f	587	if (pb->len < sizeof(*ph)) {
andrewbonney	0:ec559500a63f	588	printf("pppoe_data_input: could not get PPPoE header\n");
andrewbonney	0:ec559500a63f	589	goto drop;
andrewbonney	0:ec559500a63f	590	}
andrewbonney	0:ec559500a63f	591	ph = (struct pppoehdr *)pb->payload;
andrewbonney	0:ec559500a63f	592
andrewbonney	0:ec559500a63f	593	if (ph->vertype != PPPOE_VERTYPE) {
andrewbonney	0:ec559500a63f	594	printf("pppoe (data): unknown version/type packet: 0x%x\n", ph->vertype);
andrewbonney	0:ec559500a63f	595	goto drop;
andrewbonney	0:ec559500a63f	596	}
andrewbonney	0:ec559500a63f	597	if (ph->code != 0) {
andrewbonney	0:ec559500a63f	598	goto drop;
andrewbonney	0:ec559500a63f	599	}
andrewbonney	0:ec559500a63f	600
andrewbonney	0:ec559500a63f	601	session = ntohs(ph->session);
andrewbonney	0:ec559500a63f	602	sc = pppoe_find_softc_by_session(session, netif);
andrewbonney	0:ec559500a63f	603	if (sc == NULL) {
andrewbonney	0:ec559500a63f	604	#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
andrewbonney	0:ec559500a63f	605	printf("pppoe: input for unknown session 0x%x, sending PADT\n", session);
andrewbonney	0:ec559500a63f	606	pppoe_send_padt(netif, session, shost);
andrewbonney	0:ec559500a63f	607	#endif
andrewbonney	0:ec559500a63f	608	goto drop;
andrewbonney	0:ec559500a63f	609	}
andrewbonney	0:ec559500a63f	610
andrewbonney	0:ec559500a63f	611	plen = ntohs(ph->plen);
andrewbonney	0:ec559500a63f	612
andrewbonney	0:ec559500a63f	613	if (pbuf_header(pb, -(int)(PPPOE_HEADERLEN)) != 0) {
andrewbonney	0:ec559500a63f	614	/* bail out */
andrewbonney	0:ec559500a63f	615	PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header PPPOE_HEADERLEN failed\n"));
andrewbonney	0:ec559500a63f	616	LINK_STATS_INC(link.lenerr);
andrewbonney	0:ec559500a63f	617	goto drop;
andrewbonney	0:ec559500a63f	618	}
andrewbonney	0:ec559500a63f	619
andrewbonney	0:ec559500a63f	620	PPPDEBUG(LOG_DEBUG, ("pppoe_data_input: %c%c%"U16_F": pkthdr.len=%d, pppoe.len=%d\n",
andrewbonney	0:ec559500a63f	621	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
andrewbonney	0:ec559500a63f	622	pb->len, plen));
andrewbonney	0:ec559500a63f	623
andrewbonney	0:ec559500a63f	624	if (pb->len < plen) {
andrewbonney	0:ec559500a63f	625	goto drop;
andrewbonney	0:ec559500a63f	626	}
andrewbonney	0:ec559500a63f	627
andrewbonney	0:ec559500a63f	628	pppInProcOverEthernet(sc->sc_pd, pb);
andrewbonney	0:ec559500a63f	629
andrewbonney	0:ec559500a63f	630	return;
andrewbonney	0:ec559500a63f	631
andrewbonney	0:ec559500a63f	632	drop:
andrewbonney	0:ec559500a63f	633	pbuf_free(pb);
andrewbonney	0:ec559500a63f	634	}
andrewbonney	0:ec559500a63f	635
andrewbonney	0:ec559500a63f	636	static err_t
andrewbonney	0:ec559500a63f	637	pppoe_output(struct pppoe_softc sc, struct pbuf pb)
andrewbonney	0:ec559500a63f	638	{
andrewbonney	0:ec559500a63f	639	struct eth_hdr *ethhdr;
andrewbonney	0:ec559500a63f	640	u16_t etype;
andrewbonney	0:ec559500a63f	641	err_t res;
andrewbonney	0:ec559500a63f	642
andrewbonney	0:ec559500a63f	643	if (!sc->sc_ethif) {
andrewbonney	0:ec559500a63f	644	pbuf_free(pb);
andrewbonney	0:ec559500a63f	645	return ERR_IF;
andrewbonney	0:ec559500a63f	646	}
andrewbonney	0:ec559500a63f	647
andrewbonney	0:ec559500a63f	648	ethhdr = (struct eth_hdr *)pb->payload;
andrewbonney	0:ec559500a63f	649	etype = sc->sc_state == PPPOE_STATE_SESSION ? ETHTYPE_PPPOE : ETHTYPE_PPPOEDISC;
andrewbonney	0:ec559500a63f	650	ethhdr->type = htons(etype);
andrewbonney	0:ec559500a63f	651	MEMCPY(ethhdr->dest.addr, sc->sc_dest.addr, sizeof(ethhdr->dest.addr));
andrewbonney	0:ec559500a63f	652	MEMCPY(ethhdr->src.addr, ((struct eth_addr *)sc->sc_ethif->hwaddr)->addr, sizeof(ethhdr->src.addr));
andrewbonney	0:ec559500a63f	653
andrewbonney	0:ec559500a63f	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",
andrewbonney	0:ec559500a63f	655	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, etype,
andrewbonney	0:ec559500a63f	656	sc->sc_state, sc->sc_session,
andrewbonney	0:ec559500a63f	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],
andrewbonney	0:ec559500a63f	658	pb->tot_len));
andrewbonney	0:ec559500a63f	659
andrewbonney	0:ec559500a63f	660	res = sc->sc_ethif->linkoutput(sc->sc_ethif, pb);
andrewbonney	0:ec559500a63f	661
andrewbonney	0:ec559500a63f	662	pbuf_free(pb);
andrewbonney	0:ec559500a63f	663
andrewbonney	0:ec559500a63f	664	return res;
andrewbonney	0:ec559500a63f	665	}
andrewbonney	0:ec559500a63f	666
andrewbonney	0:ec559500a63f	667	static err_t
andrewbonney	0:ec559500a63f	668	pppoe_send_padi(struct pppoe_softc *sc)
andrewbonney	0:ec559500a63f	669	{
andrewbonney	0:ec559500a63f	670	struct pbuf *pb;
andrewbonney	0:ec559500a63f	671	u8_t *p;
andrewbonney	0:ec559500a63f	672	int len;
andrewbonney	0:ec559500a63f	673	#ifdef PPPOE_TODO
andrewbonney	0:ec559500a63f	674	int l1 = 0, l2 = 0; /* XXX: gcc */
andrewbonney	0:ec559500a63f	675	#endif /* PPPOE_TODO */
andrewbonney	0:ec559500a63f	676
andrewbonney	0:ec559500a63f	677	if (sc->sc_state >PPPOE_STATE_PADI_SENT) {
andrewbonney	0:ec559500a63f	678	PPPDEBUG(LOG_ERR, ("ERROR: pppoe_send_padi in state %d", sc->sc_state));
andrewbonney	0:ec559500a63f	679	}
andrewbonney	0:ec559500a63f	680
andrewbonney	0:ec559500a63f	681	/* calculate length of frame (excluding ethernet header + pppoe header) */
andrewbonney	0:ec559500a63f	682	len = 2 + 2 + 2 + 2 + sizeof sc; /* service name tag is required, host unique is send too */
andrewbonney	0:ec559500a63f	683	#ifdef PPPOE_TODO
andrewbonney	0:ec559500a63f	684	if (sc->sc_service_name != NULL) {
andrewbonney	0:ec559500a63f	685	l1 = (int)strlen(sc->sc_service_name);
andrewbonney	0:ec559500a63f	686	len += l1;
andrewbonney	0:ec559500a63f	687	}
andrewbonney	0:ec559500a63f	688	if (sc->sc_concentrator_name != NULL) {
andrewbonney	0:ec559500a63f	689	l2 = (int)strlen(sc->sc_concentrator_name);
andrewbonney	0:ec559500a63f	690	len += 2 + 2 + l2;
andrewbonney	0:ec559500a63f	691	}
andrewbonney	0:ec559500a63f	692	#endif /* PPPOE_TODO */
andrewbonney	0:ec559500a63f	693	LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
andrewbonney	0:ec559500a63f	694	sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
andrewbonney	0:ec559500a63f	695
andrewbonney	0:ec559500a63f	696	/* allocate a buffer */
andrewbonney	0:ec559500a63f	697	pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
andrewbonney	0:ec559500a63f	698	if (!pb) {
andrewbonney	0:ec559500a63f	699	return ERR_MEM;
andrewbonney	0:ec559500a63f	700	}
andrewbonney	0:ec559500a63f	701	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
andrewbonney	0:ec559500a63f	702
andrewbonney	0:ec559500a63f	703	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
andrewbonney	0:ec559500a63f	704	/* fill in pkt */
andrewbonney	0:ec559500a63f	705	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADI, 0, (u16_t)len);
andrewbonney	0:ec559500a63f	706	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
andrewbonney	0:ec559500a63f	707	#ifdef PPPOE_TODO
andrewbonney	0:ec559500a63f	708	if (sc->sc_service_name != NULL) {
andrewbonney	0:ec559500a63f	709	PPPOE_ADD_16(p, l1);
andrewbonney	0:ec559500a63f	710	MEMCPY(p, sc->sc_service_name, l1);
andrewbonney	0:ec559500a63f	711	p += l1;
andrewbonney	0:ec559500a63f	712	} else
andrewbonney	0:ec559500a63f	713	#endif /* PPPOE_TODO */
andrewbonney	0:ec559500a63f	714	{
andrewbonney	0:ec559500a63f	715	PPPOE_ADD_16(p, 0);
andrewbonney	0:ec559500a63f	716	}
andrewbonney	0:ec559500a63f	717	#ifdef PPPOE_TODO
andrewbonney	0:ec559500a63f	718	if (sc->sc_concentrator_name != NULL) {
andrewbonney	0:ec559500a63f	719	PPPOE_ADD_16(p, PPPOE_TAG_ACNAME);
andrewbonney	0:ec559500a63f	720	PPPOE_ADD_16(p, l2);
andrewbonney	0:ec559500a63f	721	MEMCPY(p, sc->sc_concentrator_name, l2);
andrewbonney	0:ec559500a63f	722	p += l2;
andrewbonney	0:ec559500a63f	723	}
andrewbonney	0:ec559500a63f	724	#endif /* PPPOE_TODO */
andrewbonney	0:ec559500a63f	725	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
andrewbonney	0:ec559500a63f	726	PPPOE_ADD_16(p, sizeof(sc));
andrewbonney	0:ec559500a63f	727	MEMCPY(p, &sc, sizeof sc);
andrewbonney	0:ec559500a63f	728
andrewbonney	0:ec559500a63f	729	/* send pkt */
andrewbonney	0:ec559500a63f	730	return pppoe_output(sc, pb);
andrewbonney	0:ec559500a63f	731	}
andrewbonney	0:ec559500a63f	732
andrewbonney	0:ec559500a63f	733	static void
andrewbonney	0:ec559500a63f	734	pppoe_timeout(void *arg)
andrewbonney	0:ec559500a63f	735	{
andrewbonney	0:ec559500a63f	736	int retry_wait, err;
andrewbonney	0:ec559500a63f	737	struct pppoe_softc sc = (struct pppoe_softc)arg;
andrewbonney	0:ec559500a63f	738
andrewbonney	0:ec559500a63f	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));
andrewbonney	0:ec559500a63f	740
andrewbonney	0:ec559500a63f	741	switch (sc->sc_state) {
andrewbonney	0:ec559500a63f	742	case PPPOE_STATE_PADI_SENT:
andrewbonney	0:ec559500a63f	743	/*
andrewbonney	0:ec559500a63f	744	* We have two basic ways of retrying:
andrewbonney	0:ec559500a63f	745	* - Quick retry mode: try a few times in short sequence
andrewbonney	0:ec559500a63f	746	* - Slow retry mode: we already had a connection successfully
andrewbonney	0:ec559500a63f	747	* established and will try infinitely (without user
andrewbonney	0:ec559500a63f	748	* intervention)
andrewbonney	0:ec559500a63f	749	* We only enter slow retry mode if IFF_LINK1 (aka autodial)
andrewbonney	0:ec559500a63f	750	* is not set.
andrewbonney	0:ec559500a63f	751	*/
andrewbonney	0:ec559500a63f	752
andrewbonney	0:ec559500a63f	753	/* initialize for quick retry mode */
andrewbonney	0:ec559500a63f	754	retry_wait = PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried);
andrewbonney	0:ec559500a63f	755
andrewbonney	0:ec559500a63f	756	sc->sc_padi_retried++;
andrewbonney	0:ec559500a63f	757	if (sc->sc_padi_retried >= PPPOE_DISC_MAXPADI) {
andrewbonney	0:ec559500a63f	758	#if 0
andrewbonney	0:ec559500a63f	759	if ((sc->sc_sppp.pp_if.if_flags & IFF_LINK1) == 0) {
andrewbonney	0:ec559500a63f	760	/* slow retry mode */
andrewbonney	0:ec559500a63f	761	retry_wait = PPPOE_SLOW_RETRY;
andrewbonney	0:ec559500a63f	762	} else
andrewbonney	0:ec559500a63f	763	#endif
andrewbonney	0:ec559500a63f	764	{
andrewbonney	0:ec559500a63f	765	pppoe_abort_connect(sc);
andrewbonney	0:ec559500a63f	766	return;
andrewbonney	0:ec559500a63f	767	}
andrewbonney	0:ec559500a63f	768	}
andrewbonney	0:ec559500a63f	769	if ((err = pppoe_send_padi(sc)) != 0) {
andrewbonney	0:ec559500a63f	770	sc->sc_padi_retried--;
andrewbonney	0:ec559500a63f	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));
andrewbonney	0:ec559500a63f	772	}
andrewbonney	0:ec559500a63f	773	sys_timeout(retry_wait, pppoe_timeout, sc);
andrewbonney	0:ec559500a63f	774	break;
andrewbonney	0:ec559500a63f	775
andrewbonney	0:ec559500a63f	776	case PPPOE_STATE_PADR_SENT:
andrewbonney	0:ec559500a63f	777	sc->sc_padr_retried++;
andrewbonney	0:ec559500a63f	778	if (sc->sc_padr_retried >= PPPOE_DISC_MAXPADR) {
andrewbonney	0:ec559500a63f	779	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
andrewbonney	0:ec559500a63f	780	sc->sc_state = PPPOE_STATE_PADI_SENT;
andrewbonney	0:ec559500a63f	781	sc->sc_padr_retried = 0;
andrewbonney	0:ec559500a63f	782	if ((err = pppoe_send_padi(sc)) != 0) {
andrewbonney	0:ec559500a63f	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));
andrewbonney	0:ec559500a63f	784	}
andrewbonney	0:ec559500a63f	785	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried), pppoe_timeout, sc);
andrewbonney	0:ec559500a63f	786	return;
andrewbonney	0:ec559500a63f	787	}
andrewbonney	0:ec559500a63f	788	if ((err = pppoe_send_padr(sc)) != 0) {
andrewbonney	0:ec559500a63f	789	sc->sc_padr_retried--;
andrewbonney	0:ec559500a63f	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));
andrewbonney	0:ec559500a63f	791	}
andrewbonney	0:ec559500a63f	792	sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
andrewbonney	0:ec559500a63f	793	break;
andrewbonney	0:ec559500a63f	794	case PPPOE_STATE_CLOSING:
andrewbonney	0:ec559500a63f	795	pppoe_do_disconnect(sc);
andrewbonney	0:ec559500a63f	796	break;
andrewbonney	0:ec559500a63f	797	default:
andrewbonney	0:ec559500a63f	798	return; /* all done, work in peace */
andrewbonney	0:ec559500a63f	799	}
andrewbonney	0:ec559500a63f	800	}
andrewbonney	0:ec559500a63f	801
andrewbonney	0:ec559500a63f	802	/* Start a connection (i.e. initiate discovery phase) */
andrewbonney	0:ec559500a63f	803	int
andrewbonney	0:ec559500a63f	804	pppoe_connect(struct pppoe_softc *sc)
andrewbonney	0:ec559500a63f	805	{
andrewbonney	0:ec559500a63f	806	int err;
andrewbonney	0:ec559500a63f	807
andrewbonney	0:ec559500a63f	808	if (sc->sc_state != PPPOE_STATE_INITIAL) {
andrewbonney	0:ec559500a63f	809	return EBUSY;
andrewbonney	0:ec559500a63f	810	}
andrewbonney	0:ec559500a63f	811
andrewbonney	0:ec559500a63f	812	#ifdef PPPOE_SERVER
andrewbonney	0:ec559500a63f	813	/* wait PADI if IFF_PASSIVE */
andrewbonney	0:ec559500a63f	814	if ((sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
andrewbonney	0:ec559500a63f	815	return 0;
andrewbonney	0:ec559500a63f	816	}
andrewbonney	0:ec559500a63f	817	#endif
andrewbonney	0:ec559500a63f	818	/* save state, in case we fail to send PADI */
andrewbonney	0:ec559500a63f	819	sc->sc_state = PPPOE_STATE_PADI_SENT;
andrewbonney	0:ec559500a63f	820	sc->sc_padr_retried = 0;
andrewbonney	0:ec559500a63f	821	err = pppoe_send_padi(sc);
andrewbonney	0:ec559500a63f	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));
andrewbonney	0:ec559500a63f	823	sys_timeout(PPPOE_DISC_TIMEOUT, pppoe_timeout, sc);
andrewbonney	0:ec559500a63f	824	return err;
andrewbonney	0:ec559500a63f	825	}
andrewbonney	0:ec559500a63f	826
andrewbonney	0:ec559500a63f	827	/* disconnect */
andrewbonney	0:ec559500a63f	828	void
andrewbonney	0:ec559500a63f	829	pppoe_disconnect(struct pppoe_softc *sc)
andrewbonney	0:ec559500a63f	830	{
andrewbonney	0:ec559500a63f	831	if (sc->sc_state < PPPOE_STATE_SESSION) {
andrewbonney	0:ec559500a63f	832	return;
andrewbonney	0:ec559500a63f	833	}
andrewbonney	0:ec559500a63f	834	/*
andrewbonney	0:ec559500a63f	835	* Do not call pppoe_disconnect here, the upper layer state
andrewbonney	0:ec559500a63f	836	* machine gets confused by this. We must return from this
andrewbonney	0:ec559500a63f	837	* function and defer disconnecting to the timeout handler.
andrewbonney	0:ec559500a63f	838	*/
andrewbonney	0:ec559500a63f	839	sc->sc_state = PPPOE_STATE_CLOSING;
andrewbonney	0:ec559500a63f	840	sys_timeout(20, pppoe_timeout, sc);
andrewbonney	0:ec559500a63f	841	}
andrewbonney	0:ec559500a63f	842
andrewbonney	0:ec559500a63f	843	static int
andrewbonney	0:ec559500a63f	844	pppoe_do_disconnect(struct pppoe_softc *sc)
andrewbonney	0:ec559500a63f	845	{
andrewbonney	0:ec559500a63f	846	int err;
andrewbonney	0:ec559500a63f	847
andrewbonney	0:ec559500a63f	848	if (sc->sc_state < PPPOE_STATE_SESSION) {
andrewbonney	0:ec559500a63f	849	err = EBUSY;
andrewbonney	0:ec559500a63f	850	} else {
andrewbonney	0:ec559500a63f	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));
andrewbonney	0:ec559500a63f	852	err = pppoe_send_padt(sc->sc_ethif, sc->sc_session, (const u8_t *)&sc->sc_dest);
andrewbonney	0:ec559500a63f	853	}
andrewbonney	0:ec559500a63f	854
andrewbonney	0:ec559500a63f	855	/* cleanup softc */
andrewbonney	0:ec559500a63f	856	sc->sc_state = PPPOE_STATE_INITIAL;
andrewbonney	0:ec559500a63f	857	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
andrewbonney	0:ec559500a63f	858	sc->sc_ac_cookie_len = 0;
andrewbonney	0:ec559500a63f	859	#ifdef PPPOE_SERVER
andrewbonney	0:ec559500a63f	860	if (sc->sc_hunique) {
andrewbonney	0:ec559500a63f	861	mem_free(sc->sc_hunique);
andrewbonney	0:ec559500a63f	862	sc->sc_hunique = NULL;
andrewbonney	0:ec559500a63f	863	}
andrewbonney	0:ec559500a63f	864	sc->sc_hunique_len = 0;
andrewbonney	0:ec559500a63f	865	#endif
andrewbonney	0:ec559500a63f	866	sc->sc_session = 0;
andrewbonney	0:ec559500a63f	867
andrewbonney	0:ec559500a63f	868	sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
andrewbonney	0:ec559500a63f	869
andrewbonney	0:ec559500a63f	870	return err;
andrewbonney	0:ec559500a63f	871	}
andrewbonney	0:ec559500a63f	872
andrewbonney	0:ec559500a63f	873	/* Connection attempt aborted */
andrewbonney	0:ec559500a63f	874	static void
andrewbonney	0:ec559500a63f	875	pppoe_abort_connect(struct pppoe_softc *sc)
andrewbonney	0:ec559500a63f	876	{
andrewbonney	0:ec559500a63f	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);
andrewbonney	0:ec559500a63f	878	sc->sc_state = PPPOE_STATE_CLOSING;
andrewbonney	0:ec559500a63f	879
andrewbonney	0:ec559500a63f	880	sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
andrewbonney	0:ec559500a63f	881
andrewbonney	0:ec559500a63f	882	/* clear connection state */
andrewbonney	0:ec559500a63f	883	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
andrewbonney	0:ec559500a63f	884	sc->sc_state = PPPOE_STATE_INITIAL;
andrewbonney	0:ec559500a63f	885	}
andrewbonney	0:ec559500a63f	886
andrewbonney	0:ec559500a63f	887	/* Send a PADR packet */
andrewbonney	0:ec559500a63f	888	static err_t
andrewbonney	0:ec559500a63f	889	pppoe_send_padr(struct pppoe_softc *sc)
andrewbonney	0:ec559500a63f	890	{
andrewbonney	0:ec559500a63f	891	struct pbuf *pb;
andrewbonney	0:ec559500a63f	892	u8_t *p;
andrewbonney	0:ec559500a63f	893	size_t len;
andrewbonney	0:ec559500a63f	894	#ifdef PPPOE_TODO
andrewbonney	0:ec559500a63f	895	size_t l1 = 0; /* XXX: gcc */
andrewbonney	0:ec559500a63f	896	#endif /* PPPOE_TODO */
andrewbonney	0:ec559500a63f	897
andrewbonney	0:ec559500a63f	898	if (sc->sc_state != PPPOE_STATE_PADR_SENT) {
andrewbonney	0:ec559500a63f	899	return ERR_CONN;
andrewbonney	0:ec559500a63f	900	}
andrewbonney	0:ec559500a63f	901
andrewbonney	0:ec559500a63f	902	len = 2 + 2 + 2 + 2 + sizeof(sc); /* service name, host unique */
andrewbonney	0:ec559500a63f	903	#ifdef PPPOE_TODO
andrewbonney	0:ec559500a63f	904	if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
andrewbonney	0:ec559500a63f	905	l1 = strlen(sc->sc_service_name);
andrewbonney	0:ec559500a63f	906	len += l1;
andrewbonney	0:ec559500a63f	907	}
andrewbonney	0:ec559500a63f	908	#endif /* PPPOE_TODO */
andrewbonney	0:ec559500a63f	909	if (sc->sc_ac_cookie_len > 0) {
andrewbonney	0:ec559500a63f	910	len += 2 + 2 + sc->sc_ac_cookie_len; /* AC cookie */
andrewbonney	0:ec559500a63f	911	}
andrewbonney	0:ec559500a63f	912	LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
andrewbonney	0:ec559500a63f	913	sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
andrewbonney	0:ec559500a63f	914	pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
andrewbonney	0:ec559500a63f	915	if (!pb) {
andrewbonney	0:ec559500a63f	916	return ERR_MEM;
andrewbonney	0:ec559500a63f	917	}
andrewbonney	0:ec559500a63f	918	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
andrewbonney	0:ec559500a63f	919	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
andrewbonney	0:ec559500a63f	920	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADR, 0, len);
andrewbonney	0:ec559500a63f	921	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
andrewbonney	0:ec559500a63f	922	#ifdef PPPOE_TODO
andrewbonney	0:ec559500a63f	923	if (sc->sc_service_name != NULL) {
andrewbonney	0:ec559500a63f	924	PPPOE_ADD_16(p, l1);
andrewbonney	0:ec559500a63f	925	MEMCPY(p, sc->sc_service_name, l1);
andrewbonney	0:ec559500a63f	926	p += l1;
andrewbonney	0:ec559500a63f	927	} else
andrewbonney	0:ec559500a63f	928	#endif /* PPPOE_TODO */
andrewbonney	0:ec559500a63f	929	{
andrewbonney	0:ec559500a63f	930	PPPOE_ADD_16(p, 0);
andrewbonney	0:ec559500a63f	931	}
andrewbonney	0:ec559500a63f	932	if (sc->sc_ac_cookie_len > 0) {
andrewbonney	0:ec559500a63f	933	PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
andrewbonney	0:ec559500a63f	934	PPPOE_ADD_16(p, sc->sc_ac_cookie_len);
andrewbonney	0:ec559500a63f	935	MEMCPY(p, sc->sc_ac_cookie, sc->sc_ac_cookie_len);
andrewbonney	0:ec559500a63f	936	p += sc->sc_ac_cookie_len;
andrewbonney	0:ec559500a63f	937	}
andrewbonney	0:ec559500a63f	938	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
andrewbonney	0:ec559500a63f	939	PPPOE_ADD_16(p, sizeof(sc));
andrewbonney	0:ec559500a63f	940	MEMCPY(p, &sc, sizeof sc);
andrewbonney	0:ec559500a63f	941
andrewbonney	0:ec559500a63f	942	return pppoe_output(sc, pb);
andrewbonney	0:ec559500a63f	943	}
andrewbonney	0:ec559500a63f	944
andrewbonney	0:ec559500a63f	945	/* send a PADT packet */
andrewbonney	0:ec559500a63f	946	static err_t
andrewbonney	0:ec559500a63f	947	pppoe_send_padt(struct netif outgoing_if, u_int session, const u8_t dest)
andrewbonney	0:ec559500a63f	948	{
andrewbonney	0:ec559500a63f	949	struct pbuf *pb;
andrewbonney	0:ec559500a63f	950	struct eth_hdr *ethhdr;
andrewbonney	0:ec559500a63f	951	err_t res;
andrewbonney	0:ec559500a63f	952	u8_t *p;
andrewbonney	0:ec559500a63f	953
andrewbonney	0:ec559500a63f	954	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN, PBUF_RAM);
andrewbonney	0:ec559500a63f	955	if (!pb) {
andrewbonney	0:ec559500a63f	956	return ERR_MEM;
andrewbonney	0:ec559500a63f	957	}
andrewbonney	0:ec559500a63f	958	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
andrewbonney	0:ec559500a63f	959
andrewbonney	0:ec559500a63f	960	ethhdr = (struct eth_hdr *)pb->payload;
andrewbonney	0:ec559500a63f	961	ethhdr->type = PP_HTONS(ETHTYPE_PPPOEDISC);
andrewbonney	0:ec559500a63f	962	MEMCPY(ethhdr->dest.addr, dest, sizeof(ethhdr->dest.addr));
andrewbonney	0:ec559500a63f	963	MEMCPY(ethhdr->src.addr, ((struct eth_addr *)outgoing_if->hwaddr)->addr, sizeof(ethhdr->src.addr));
andrewbonney	0:ec559500a63f	964
andrewbonney	0:ec559500a63f	965	p = (u8_t*)(ethhdr + 1);
andrewbonney	0:ec559500a63f	966	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADT, session, 0);
andrewbonney	0:ec559500a63f	967
andrewbonney	0:ec559500a63f	968	res = outgoing_if->linkoutput(outgoing_if, pb);
andrewbonney	0:ec559500a63f	969
andrewbonney	0:ec559500a63f	970	pbuf_free(pb);
andrewbonney	0:ec559500a63f	971
andrewbonney	0:ec559500a63f	972	return res;
andrewbonney	0:ec559500a63f	973	}
andrewbonney	0:ec559500a63f	974
andrewbonney	0:ec559500a63f	975	#ifdef PPPOE_SERVER
andrewbonney	0:ec559500a63f	976	static err_t
andrewbonney	0:ec559500a63f	977	pppoe_send_pado(struct pppoe_softc *sc)
andrewbonney	0:ec559500a63f	978	{
andrewbonney	0:ec559500a63f	979	struct pbuf *pb;
andrewbonney	0:ec559500a63f	980	u8_t *p;
andrewbonney	0:ec559500a63f	981	size_t len;
andrewbonney	0:ec559500a63f	982
andrewbonney	0:ec559500a63f	983	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
andrewbonney	0:ec559500a63f	984	return ERR_CONN;
andrewbonney	0:ec559500a63f	985	}
andrewbonney	0:ec559500a63f	986
andrewbonney	0:ec559500a63f	987	/* calc length */
andrewbonney	0:ec559500a63f	988	len = 0;
andrewbonney	0:ec559500a63f	989	/* include ac_cookie */
andrewbonney	0:ec559500a63f	990	len += 2 + 2 + sizeof(sc);
andrewbonney	0:ec559500a63f	991	/* include hunique */
andrewbonney	0:ec559500a63f	992	len += 2 + 2 + sc->sc_hunique_len;
andrewbonney	0:ec559500a63f	993	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
andrewbonney	0:ec559500a63f	994	if (!pb) {
andrewbonney	0:ec559500a63f	995	return ERR_MEM;
andrewbonney	0:ec559500a63f	996	}
andrewbonney	0:ec559500a63f	997	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
andrewbonney	0:ec559500a63f	998	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
andrewbonney	0:ec559500a63f	999	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADO, 0, len);
andrewbonney	0:ec559500a63f	1000	PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
andrewbonney	0:ec559500a63f	1001	PPPOE_ADD_16(p, sizeof(sc));
andrewbonney	0:ec559500a63f	1002	MEMCPY(p, &sc, sizeof(sc));
andrewbonney	0:ec559500a63f	1003	p += sizeof(sc);
andrewbonney	0:ec559500a63f	1004	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
andrewbonney	0:ec559500a63f	1005	PPPOE_ADD_16(p, sc->sc_hunique_len);
andrewbonney	0:ec559500a63f	1006	MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
andrewbonney	0:ec559500a63f	1007	return pppoe_output(sc, pb);
andrewbonney	0:ec559500a63f	1008	}
andrewbonney	0:ec559500a63f	1009
andrewbonney	0:ec559500a63f	1010	static err_t
andrewbonney	0:ec559500a63f	1011	pppoe_send_pads(struct pppoe_softc *sc)
andrewbonney	0:ec559500a63f	1012	{
andrewbonney	0:ec559500a63f	1013	struct pbuf *pb;
andrewbonney	0:ec559500a63f	1014	u8_t *p;
andrewbonney	0:ec559500a63f	1015	size_t len, l1 = 0; /* XXX: gcc */
andrewbonney	0:ec559500a63f	1016
andrewbonney	0:ec559500a63f	1017	if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
andrewbonney	0:ec559500a63f	1018	return ERR_CONN;
andrewbonney	0:ec559500a63f	1019	}
andrewbonney	0:ec559500a63f	1020
andrewbonney	0:ec559500a63f	1021	sc->sc_session = mono_time.tv_sec % 0xff + 1;
andrewbonney	0:ec559500a63f	1022	/* calc length */
andrewbonney	0:ec559500a63f	1023	len = 0;
andrewbonney	0:ec559500a63f	1024	/* include hunique */
andrewbonney	0:ec559500a63f	1025	len += 2 + 2 + 2 + 2 + sc->sc_hunique_len; /* service name, host unique*/
andrewbonney	0:ec559500a63f	1026	if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
andrewbonney	0:ec559500a63f	1027	l1 = strlen(sc->sc_service_name);
andrewbonney	0:ec559500a63f	1028	len += l1;
andrewbonney	0:ec559500a63f	1029	}
andrewbonney	0:ec559500a63f	1030	pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
andrewbonney	0:ec559500a63f	1031	if (!pb) {
andrewbonney	0:ec559500a63f	1032	return ERR_MEM;
andrewbonney	0:ec559500a63f	1033	}
andrewbonney	0:ec559500a63f	1034	LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
andrewbonney	0:ec559500a63f	1035	p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
andrewbonney	0:ec559500a63f	1036	PPPOE_ADD_HEADER(p, PPPOE_CODE_PADS, sc->sc_session, len);
andrewbonney	0:ec559500a63f	1037	PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
andrewbonney	0:ec559500a63f	1038	if (sc->sc_service_name != NULL) {
andrewbonney	0:ec559500a63f	1039	PPPOE_ADD_16(p, l1);
andrewbonney	0:ec559500a63f	1040	MEMCPY(p, sc->sc_service_name, l1);
andrewbonney	0:ec559500a63f	1041	p += l1;
andrewbonney	0:ec559500a63f	1042	} else {
andrewbonney	0:ec559500a63f	1043	PPPOE_ADD_16(p, 0);
andrewbonney	0:ec559500a63f	1044	}
andrewbonney	0:ec559500a63f	1045	PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
andrewbonney	0:ec559500a63f	1046	PPPOE_ADD_16(p, sc->sc_hunique_len);
andrewbonney	0:ec559500a63f	1047	MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
andrewbonney	0:ec559500a63f	1048	return pppoe_output(sc, pb);
andrewbonney	0:ec559500a63f	1049	}
andrewbonney	0:ec559500a63f	1050	#endif
andrewbonney	0:ec559500a63f	1051
andrewbonney	0:ec559500a63f	1052	err_t
andrewbonney	0:ec559500a63f	1053	pppoe_xmit(struct pppoe_softc sc, struct pbuf pb)
andrewbonney	0:ec559500a63f	1054	{
andrewbonney	0:ec559500a63f	1055	u8_t *p;
andrewbonney	0:ec559500a63f	1056	size_t len;
andrewbonney	0:ec559500a63f	1057
andrewbonney	0:ec559500a63f	1058	/* are we ready to process data yet? */
andrewbonney	0:ec559500a63f	1059	if (sc->sc_state < PPPOE_STATE_SESSION) {
andrewbonney	0:ec559500a63f	1060	/sppp_flush(&sc->sc_sppp.pp_if);/
andrewbonney	0:ec559500a63f	1061	pbuf_free(pb);
andrewbonney	0:ec559500a63f	1062	return ERR_CONN;
andrewbonney	0:ec559500a63f	1063	}
andrewbonney	0:ec559500a63f	1064
andrewbonney	0:ec559500a63f	1065	len = pb->tot_len;
andrewbonney	0:ec559500a63f	1066
andrewbonney	0:ec559500a63f	1067	/* make room for Ethernet header - should not fail */
andrewbonney	0:ec559500a63f	1068	if (pbuf_header(pb, sizeof(struct eth_hdr) + PPPOE_HEADERLEN) != 0) {
andrewbonney	0:ec559500a63f	1069	/* bail out */
andrewbonney	0:ec559500a63f	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));
andrewbonney	0:ec559500a63f	1071	LINK_STATS_INC(link.lenerr);
andrewbonney	0:ec559500a63f	1072	pbuf_free(pb);
andrewbonney	0:ec559500a63f	1073	return ERR_BUF;
andrewbonney	0:ec559500a63f	1074	}
andrewbonney	0:ec559500a63f	1075
andrewbonney	0:ec559500a63f	1076	p = (u8_t*)pb->payload + sizeof(struct eth_hdr);
andrewbonney	0:ec559500a63f	1077	PPPOE_ADD_HEADER(p, 0, sc->sc_session, len);
andrewbonney	0:ec559500a63f	1078
andrewbonney	0:ec559500a63f	1079	return pppoe_output(sc, pb);
andrewbonney	0:ec559500a63f	1080	}
andrewbonney	0:ec559500a63f	1081
andrewbonney	0:ec559500a63f	1082	#if 0 /def PFIL_HOOKS/
andrewbonney	0:ec559500a63f	1083	static int
andrewbonney	0:ec559500a63f	1084	pppoe_ifattach_hook(void arg, struct pbuf mp, struct netif ifp, int dir)
andrewbonney	0:ec559500a63f	1085	{
andrewbonney	0:ec559500a63f	1086	struct pppoe_softc *sc;
andrewbonney	0:ec559500a63f	1087	int s;
andrewbonney	0:ec559500a63f	1088
andrewbonney	0:ec559500a63f	1089	if (mp != (struct pbuf **)PFIL_IFNET_DETACH) {
andrewbonney	0:ec559500a63f	1090	return 0;
andrewbonney	0:ec559500a63f	1091	}
andrewbonney	0:ec559500a63f	1092
andrewbonney	0:ec559500a63f	1093	LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
andrewbonney	0:ec559500a63f	1094	if (sc->sc_ethif != ifp) {
andrewbonney	0:ec559500a63f	1095	continue;
andrewbonney	0:ec559500a63f	1096	}
andrewbonney	0:ec559500a63f	1097	if (sc->sc_sppp.pp_if.if_flags & IFF_UP) {
andrewbonney	0:ec559500a63f	1098	sc->sc_sppp.pp_if.if_flags &= ~(IFF_UP\|IFF_RUNNING);
andrewbonney	0:ec559500a63f	1099	printf("%c%c%"U16_F": ethernet interface detached, going down\n",
andrewbonney	0:ec559500a63f	1100	sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
andrewbonney	0:ec559500a63f	1101	}
andrewbonney	0:ec559500a63f	1102	sc->sc_ethif = NULL;
andrewbonney	0:ec559500a63f	1103	pppoe_clear_softc(sc, "ethernet interface detached");
andrewbonney	0:ec559500a63f	1104	}
andrewbonney	0:ec559500a63f	1105
andrewbonney	0:ec559500a63f	1106	return 0;
andrewbonney	0:ec559500a63f	1107	}
andrewbonney	0:ec559500a63f	1108	#endif
andrewbonney	0:ec559500a63f	1109
andrewbonney	0:ec559500a63f	1110	static void
andrewbonney	0:ec559500a63f	1111	pppoe_clear_softc(struct pppoe_softc sc, const char message)
andrewbonney	0:ec559500a63f	1112	{
andrewbonney	0:ec559500a63f	1113	LWIP_UNUSED_ARG(message);
andrewbonney	0:ec559500a63f	1114
andrewbonney	0:ec559500a63f	1115	/* stop timer */
andrewbonney	0:ec559500a63f	1116	sys_untimeout(pppoe_timeout, sc);
andrewbonney	0:ec559500a63f	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));
andrewbonney	0:ec559500a63f	1118
andrewbonney	0:ec559500a63f	1119	/* fix our state */
andrewbonney	0:ec559500a63f	1120	sc->sc_state = PPPOE_STATE_INITIAL;
andrewbonney	0:ec559500a63f	1121
andrewbonney	0:ec559500a63f	1122	/* notify upper layers */
andrewbonney	0:ec559500a63f	1123	sc->sc_linkStatusCB(sc->sc_pd, 0);
andrewbonney	0:ec559500a63f	1124
andrewbonney	0:ec559500a63f	1125	/* clean up softc */
andrewbonney	0:ec559500a63f	1126	MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
andrewbonney	0:ec559500a63f	1127	sc->sc_ac_cookie_len = 0;
andrewbonney	0:ec559500a63f	1128	sc->sc_session = 0;
andrewbonney	0:ec559500a63f	1129	}
andrewbonney	0:ec559500a63f	1130
andrewbonney	0:ec559500a63f	1131	#endif /* PPPOE_SUPPORT */
andrewbonney	0:ec559500a63f	1132

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Type:	Library
Created:	08 Apr 2011
Imports:	86
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	3

lwip/netif/ppp/ppp_oe.c@0:ec559500a63f, 2011-04-08 (annotated)

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