kopia lustrzana https://github.com/espressif/esp-idf
1251 wiersze
37 KiB
C
1251 wiersze
37 KiB
C
![]() |
/*****************************************************************************
|
||
|
* pppoe.c - PPP Over Ethernet implementation for lwIP.
|
||
|
*
|
||
|
* Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc.
|
||
|
*
|
||
|
* The authors hereby grant permission to use, copy, modify, distribute,
|
||
|
* and license this software and its documentation for any purpose, provided
|
||
|
* that existing copyright notices are retained in all copies and that this
|
||
|
* notice and the following disclaimer are included verbatim in any
|
||
|
* distributions. No written agreement, license, or royalty fee is required
|
||
|
* for any of the authorized uses.
|
||
|
*
|
||
|
* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
|
||
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||
|
* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
*
|
||
|
******************************************************************************
|
||
|
* REVISION HISTORY
|
||
|
*
|
||
|
* 06-01-01 Marc Boucher <marc@mbsi.ca>
|
||
|
* Ported to lwIP.
|
||
|
*****************************************************************************/
|
||
|
|
||
|
|
||
|
|
||
|
/* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */
|
||
|
|
||
|
/*-
|
||
|
* Copyright (c) 2002 The NetBSD Foundation, Inc.
|
||
|
* All rights reserved.
|
||
|
*
|
||
|
* This code is derived from software contributed to The NetBSD Foundation
|
||
|
* by Martin Husemann <martin@NetBSD.org>.
|
||
|
*
|
||
|
* Redistribution and use in source and binary forms, with or without
|
||
|
* modification, are permitted provided that the following conditions
|
||
|
* are met:
|
||
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
* notice, this list of conditions and the following disclaimer.
|
||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
* documentation and/or other materials provided with the distribution.
|
||
|
* 3. All advertising materials mentioning features or use of this software
|
||
|
* must display the following acknowledgement:
|
||
|
* This product includes software developed by the NetBSD
|
||
|
* Foundation, Inc. and its contributors.
|
||
|
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
||
|
* contributors may be used to endorse or promote products derived
|
||
|
* from this software without specific prior written permission.
|
||
|
*
|
||
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
||
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
||
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
||
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||
|
* POSSIBILITY OF SUCH DAMAGE.
|
||
|
*/
|
||
|
|
||
|
#include "lwip/opt.h"
|
||
|
#if PPP_SUPPORT && PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */
|
||
|
|
||
|
#if 0 /* UNUSED */
|
||
|
#include <string.h>
|
||
|
#include <stdio.h>
|
||
|
#endif /* UNUSED */
|
||
|
|
||
|
#include "lwip/timers.h"
|
||
|
#include "lwip/memp.h"
|
||
|
#include "lwip/stats.h"
|
||
|
#include "lwip/snmp.h"
|
||
|
|
||
|
#include "netif/ppp/ppp_impl.h"
|
||
|
#include "netif/ppp/lcp.h"
|
||
|
#include "netif/ppp/ipcp.h"
|
||
|
#include "netif/ppp/pppoe.h"
|
||
|
|
||
|
/* Add a 16 bit unsigned value to a buffer pointed to by PTR */
|
||
|
#define PPPOE_ADD_16(PTR, VAL) \
|
||
|
*(PTR)++ = (u8_t)((VAL) / 256); \
|
||
|
*(PTR)++ = (u8_t)((VAL) % 256)
|
||
|
|
||
|
/* Add a complete PPPoE header to the buffer pointed to by PTR */
|
||
|
#define PPPOE_ADD_HEADER(PTR, CODE, SESS, LEN) \
|
||
|
*(PTR)++ = PPPOE_VERTYPE; \
|
||
|
*(PTR)++ = (CODE); \
|
||
|
PPPOE_ADD_16(PTR, SESS); \
|
||
|
PPPOE_ADD_16(PTR, LEN)
|
||
|
|
||
|
#define PPPOE_DISC_TIMEOUT (5*1000) /* base for quick timeout calculation */
|
||
|
#define PPPOE_SLOW_RETRY (60*1000) /* persistent retry interval */
|
||
|
#define PPPOE_DISC_MAXPADI 4 /* retry PADI four times (quickly) */
|
||
|
#define PPPOE_DISC_MAXPADR 2 /* retry PADR twice */
|
||
|
|
||
|
#ifdef PPPOE_SERVER
|
||
|
#error "PPPOE_SERVER is not yet supported under lwIP!"
|
||
|
/* from if_spppsubr.c */
|
||
|
#define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
|
||
|
#endif
|
||
|
|
||
|
#define PPPOE_ERRORSTRING_LEN 64
|
||
|
|
||
|
|
||
|
/* callbacks called from PPP core */
|
||
|
static err_t pppoe_write(ppp_pcb *ppp, void *ctx, struct pbuf *p);
|
||
|
static err_t pppoe_netif_output(ppp_pcb *ppp, void *ctx, struct pbuf *p, u_short protocol);
|
||
|
static err_t pppoe_connect(ppp_pcb *ppp, void *ctx);
|
||
|
static void pppoe_disconnect(ppp_pcb *ppp, void *ctx);
|
||
|
static err_t pppoe_destroy(ppp_pcb *ppp, void *ctx);
|
||
|
|
||
|
/* management routines */
|
||
|
static void pppoe_abort_connect(struct pppoe_softc *);
|
||
|
#if 0 /* UNUSED */
|
||
|
static void pppoe_clear_softc(struct pppoe_softc *, const char *);
|
||
|
#endif /* UNUSED */
|
||
|
|
||
|
/* internal timeout handling */
|
||
|
static void pppoe_timeout(void *);
|
||
|
|
||
|
/* sending actual protocol controll packets */
|
||
|
static err_t pppoe_send_padi(struct pppoe_softc *);
|
||
|
static err_t pppoe_send_padr(struct pppoe_softc *);
|
||
|
#ifdef PPPOE_SERVER
|
||
|
static err_t pppoe_send_pado(struct pppoe_softc *);
|
||
|
static err_t pppoe_send_pads(struct pppoe_softc *);
|
||
|
#endif
|
||
|
static err_t pppoe_send_padt(struct netif *, u_int, const u8_t *);
|
||
|
|
||
|
/* internal helper functions */
|
||
|
static err_t pppoe_xmit(struct pppoe_softc *sc, struct pbuf *pb);
|
||
|
static struct pppoe_softc* pppoe_find_softc_by_session(u_int session, struct netif *rcvif);
|
||
|
static struct pppoe_softc* pppoe_find_softc_by_hunique(u8_t *token, size_t len, struct netif *rcvif);
|
||
|
|
||
|
/** linked list of created pppoe interfaces */
|
||
|
static struct pppoe_softc *pppoe_softc_list;
|
||
|
|
||
|
/* Callbacks structure for PPP core */
|
||
|
static const struct link_callbacks pppoe_callbacks = {
|
||
|
pppoe_connect,
|
||
|
#if PPP_SERVER
|
||
|
NULL,
|
||
|
#endif /* PPP_SERVER */
|
||
|
pppoe_disconnect,
|
||
|
pppoe_destroy,
|
||
|
pppoe_write,
|
||
|
pppoe_netif_output,
|
||
|
NULL,
|
||
|
NULL
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* Create a new PPP Over Ethernet (PPPoE) connection.
|
||
|
*
|
||
|
* Return 0 on success, an error code on failure.
|
||
|
*/
|
||
|
ppp_pcb *pppoe_create(struct netif *pppif,
|
||
|
struct netif *ethif,
|
||
|
const char *service_name, const char *concentrator_name,
|
||
|
ppp_link_status_cb_fn link_status_cb, void *ctx_cb)
|
||
|
{
|
||
|
ppp_pcb *ppp;
|
||
|
struct pppoe_softc *sc;
|
||
|
LWIP_UNUSED_ARG(service_name);
|
||
|
LWIP_UNUSED_ARG(concentrator_name);
|
||
|
|
||
|
sc = (struct pppoe_softc *)memp_malloc(MEMP_PPPOE_IF);
|
||
|
if (sc == NULL) {
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
ppp = ppp_new(pppif, &pppoe_callbacks, sc, link_status_cb, ctx_cb);
|
||
|
if (ppp == NULL) {
|
||
|
memp_free(MEMP_PPPOE_IF, sc);
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
memset(sc, 0, sizeof(struct pppoe_softc));
|
||
|
/* changed to real address later */
|
||
|
MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
|
||
|
sc->pcb = ppp;
|
||
|
sc->sc_ethif = ethif;
|
||
|
/* put the new interface at the head of the list */
|
||
|
sc->next = pppoe_softc_list;
|
||
|
pppoe_softc_list = sc;
|
||
|
return ppp;
|
||
|
}
|
||
|
|
||
|
/* Called by PPP core */
|
||
|
static err_t pppoe_write(ppp_pcb *ppp, void *ctx, struct pbuf *p) {
|
||
|
struct pppoe_softc *sc = (struct pppoe_softc *)ctx;
|
||
|
struct pbuf *ph; /* Ethernet + PPPoE header */
|
||
|
err_t ret;
|
||
|
#if MIB2_STATS
|
||
|
u16_t tot_len;
|
||
|
#else /* MIB2_STATS */
|
||
|
LWIP_UNUSED_ARG(ppp);
|
||
|
#endif /* MIB2_STATS */
|
||
|
|
||
|
/* skip address & flags */
|
||
|
pbuf_header(p, -(s16_t)2);
|
||
|
|
||
|
ph = pbuf_alloc(PBUF_LINK, (u16_t)(PPPOE_HEADERLEN), PBUF_RAM);
|
||
|
if(!ph) {
|
||
|
LINK_STATS_INC(link.memerr);
|
||
|
LINK_STATS_INC(link.proterr);
|
||
|
MIB2_STATS_NETIF_INC(ppp->netif, ifoutdiscards);
|
||
|
pbuf_free(p);
|
||
|
return ERR_MEM;
|
||
|
}
|
||
|
|
||
|
pbuf_header(ph, -(s16_t)PPPOE_HEADERLEN); /* hide PPPoE header */
|
||
|
pbuf_cat(ph, p);
|
||
|
#if MIB2_STATS
|
||
|
tot_len = ph->tot_len;
|
||
|
#endif /* MIB2_STATS */
|
||
|
|
||
|
ret = pppoe_xmit(sc, ph);
|
||
|
if (ret != ERR_OK) {
|
||
|
LINK_STATS_INC(link.err);
|
||
|
MIB2_STATS_NETIF_INC(ppp->netif, ifoutdiscards);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
MIB2_STATS_NETIF_ADD(ppp->netif, ifoutoctets, (u16_t)tot_len);
|
||
|
MIB2_STATS_NETIF_INC(ppp->netif, ifoutucastpkts);
|
||
|
LINK_STATS_INC(link.xmit);
|
||
|
return ERR_OK;
|
||
|
}
|
||
|
|
||
|
/* Called by PPP core */
|
||
|
static err_t pppoe_netif_output(ppp_pcb *ppp, void *ctx, struct pbuf *p, u_short protocol) {
|
||
|
struct pppoe_softc *sc = (struct pppoe_softc *)ctx;
|
||
|
struct pbuf *pb;
|
||
|
u8_t *pl;
|
||
|
err_t err;
|
||
|
#if MIB2_STATS
|
||
|
u16_t tot_len;
|
||
|
#else /* MIB2_STATS */
|
||
|
LWIP_UNUSED_ARG(ppp);
|
||
|
#endif /* MIB2_STATS */
|
||
|
|
||
|
/* @todo: try to use pbuf_header() here! */
|
||
|
pb = pbuf_alloc(PBUF_LINK, PPPOE_HEADERLEN + sizeof(protocol), PBUF_RAM);
|
||
|
if(!pb) {
|
||
|
LINK_STATS_INC(link.memerr);
|
||
|
LINK_STATS_INC(link.proterr);
|
||
|
MIB2_STATS_NETIF_INC(ppp->netif, ifoutdiscards);
|
||
|
return ERR_MEM;
|
||
|
}
|
||
|
|
||
|
pbuf_header(pb, -(s16_t)PPPOE_HEADERLEN);
|
||
|
|
||
|
pl = (u8_t*)pb->payload;
|
||
|
PUTSHORT(protocol, pl);
|
||
|
|
||
|
pbuf_chain(pb, p);
|
||
|
#if MIB2_STATS
|
||
|
tot_len = pb->tot_len;
|
||
|
#endif /* MIB2_STATS */
|
||
|
|
||
|
if( (err = pppoe_xmit(sc, pb)) != ERR_OK) {
|
||
|
LINK_STATS_INC(link.err);
|
||
|
MIB2_STATS_NETIF_INC(ppp->netif, ifoutdiscards);
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
MIB2_STATS_NETIF_ADD(ppp->netif, ifoutoctets, tot_len);
|
||
|
MIB2_STATS_NETIF_INC(ppp->netif, ifoutucastpkts);
|
||
|
LINK_STATS_INC(link.xmit);
|
||
|
return ERR_OK;
|
||
|
}
|
||
|
|
||
|
static err_t
|
||
|
pppoe_destroy(ppp_pcb *ppp, void *ctx)
|
||
|
{
|
||
|
struct pppoe_softc *sc = (struct pppoe_softc *)ctx;
|
||
|
struct pppoe_softc **copp, *freep;
|
||
|
LWIP_UNUSED_ARG(ppp);
|
||
|
|
||
|
sys_untimeout(pppoe_timeout, sc);
|
||
|
|
||
|
/* remove interface from list */
|
||
|
for (copp = &pppoe_softc_list; (freep = *copp); copp = &freep->next) {
|
||
|
if (freep == sc) {
|
||
|
*copp = freep->next;
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
#ifdef PPPOE_TODO
|
||
|
if (sc->sc_concentrator_name) {
|
||
|
mem_free(sc->sc_concentrator_name);
|
||
|
}
|
||
|
if (sc->sc_service_name) {
|
||
|
mem_free(sc->sc_service_name);
|
||
|
}
|
||
|
#endif /* PPPOE_TODO */
|
||
|
memp_free(MEMP_PPPOE_IF, sc);
|
||
|
|
||
|
return ERR_OK;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Find the interface handling the specified session.
|
||
|
* Note: O(number of sessions open), this is a client-side only, mean
|
||
|
* and lean implementation, so number of open sessions typically should
|
||
|
* be 1.
|
||
|
*/
|
||
|
static struct pppoe_softc* pppoe_find_softc_by_session(u_int session, struct netif *rcvif) {
|
||
|
struct pppoe_softc *sc;
|
||
|
|
||
|
if (session == 0) {
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
|
||
|
if (sc->sc_state == PPPOE_STATE_SESSION
|
||
|
&& sc->sc_session == session
|
||
|
&& sc->sc_ethif == rcvif) {
|
||
|
return sc;
|
||
|
}
|
||
|
}
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
/* Check host unique token passed and return appropriate softc pointer,
|
||
|
* or NULL if token is bogus. */
|
||
|
static struct pppoe_softc* pppoe_find_softc_by_hunique(u8_t *token, size_t len, struct netif *rcvif) {
|
||
|
struct pppoe_softc *sc, *t;
|
||
|
|
||
|
if (pppoe_softc_list == NULL) {
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
if (len != sizeof sc) {
|
||
|
return NULL;
|
||
|
}
|
||
|
MEMCPY(&t, token, len);
|
||
|
|
||
|
for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
|
||
|
if (sc == t) {
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (sc == NULL) {
|
||
|
PPPDEBUG(LOG_DEBUG, ("pppoe: alien host unique tag, no session found\n"));
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
/* should be safe to access *sc now */
|
||
|
if (sc->sc_state < PPPOE_STATE_PADI_SENT || sc->sc_state >= PPPOE_STATE_SESSION) {
|
||
|
PPPDEBUG(LOG_DEBUG, ("%c%c%"U16_F": host unique tag found, but it belongs to a connection in state %d\n",
|
||
|
sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_state));
|
||
|
return NULL;
|
||
|
}
|
||
|
if (sc->sc_ethif != rcvif) {
|
||
|
PPPDEBUG(LOG_DEBUG, ("%c%c%"U16_F": wrong interface, not accepting host unique\n",
|
||
|
sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
|
||
|
return NULL;
|
||
|
}
|
||
|
return sc;
|
||
|
}
|
||
|
|
||
|
/* analyze and handle a single received packet while not in session state */
|
||
|
void
|
||
|
pppoe_disc_input(struct netif *netif, struct pbuf *pb)
|
||
|
{
|
||
|
u16_t tag, len;
|
||
|
u16_t session, plen;
|
||
|
struct pppoe_softc *sc;
|
||
|
#if PPP_DEBUG
|
||
|
const char *err_msg = NULL;
|
||
|
#endif /* PPP_DEBUG */
|
||
|
u8_t *ac_cookie;
|
||
|
u16_t ac_cookie_len;
|
||
|
#ifdef PPPOE_SERVER
|
||
|
u8_t *hunique;
|
||
|
size_t hunique_len;
|
||
|
#endif
|
||
|
struct pppoehdr *ph;
|
||
|
struct pppoetag pt;
|
||
|
int off, err;
|
||
|
struct eth_hdr *ethhdr;
|
||
|
|
||
|
/* don't do anything if there is not a single PPPoE instance */
|
||
|
if (pppoe_softc_list == NULL) {
|
||
|
pbuf_free(pb);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
pb = ppp_singlebuf(pb);
|
||
|
|
||
|
if (pb->len < sizeof(*ethhdr)) {
|
||
|
goto done;
|
||
|
}
|
||
|
ethhdr = (struct eth_hdr *)pb->payload;
|
||
|
off = sizeof(*ethhdr);
|
||
|
|
||
|
ac_cookie = NULL;
|
||
|
ac_cookie_len = 0;
|
||
|
#ifdef PPPOE_SERVER
|
||
|
hunique = NULL;
|
||
|
hunique_len = 0;
|
||
|
#endif
|
||
|
session = 0;
|
||
|
if (pb->len - off < (u16_t)PPPOE_HEADERLEN) {
|
||
|
PPPDEBUG(LOG_DEBUG, ("pppoe: packet too short: %d\n", pb->len));
|
||
|
goto done;
|
||
|
}
|
||
|
|
||
|
ph = (struct pppoehdr *) (ethhdr + 1);
|
||
|
if (ph->vertype != PPPOE_VERTYPE) {
|
||
|
PPPDEBUG(LOG_DEBUG, ("pppoe: unknown version/type packet: 0x%x\n", ph->vertype));
|
||
|
goto done;
|
||
|
}
|
||
|
session = ntohs(ph->session);
|
||
|
plen = ntohs(ph->plen);
|
||
|
off += sizeof(*ph);
|
||
|
|
||
|
if (plen + off > pb->len) {
|
||
|
PPPDEBUG(LOG_DEBUG, ("pppoe: packet content does not fit: data available = %d, packet size = %u\n",
|
||
|
pb->len - off, plen));
|
||
|
goto done;
|
||
|
}
|
||
|
if(pb->tot_len == pb->len) {
|
||
|
pb->tot_len = pb->len = (u16_t)off + plen; /* ignore trailing garbage */
|
||
|
}
|
||
|
tag = 0;
|
||
|
len = 0;
|
||
|
sc = NULL;
|
||
|
while (off + sizeof(pt) <= pb->len) {
|
||
|
MEMCPY(&pt, (u8_t*)pb->payload + off, sizeof(pt));
|
||
|
tag = ntohs(pt.tag);
|
||
|
len = ntohs(pt.len);
|
||
|
if (off + sizeof(pt) + len > pb->len) {
|
||
|
PPPDEBUG(LOG_DEBUG, ("pppoe: tag 0x%x len 0x%x is too long\n", tag, len));
|
||
|
goto done;
|
||
|
}
|
||
|
switch (tag) {
|
||
|
case PPPOE_TAG_EOL:
|
||
|
goto breakbreak;
|
||
|
case PPPOE_TAG_SNAME:
|
||
|
break; /* ignored */
|
||
|
case PPPOE_TAG_ACNAME:
|
||
|
break; /* ignored */
|
||
|
case PPPOE_TAG_HUNIQUE:
|
||
|
if (sc != NULL) {
|
||
|
break;
|
||
|
}
|
||
|
#ifdef PPPOE_SERVER
|
||
|
hunique = (u8_t*)pb->payload + off + sizeof(pt);
|
||
|
hunique_len = len;
|
||
|
#endif
|
||
|
sc = pppoe_find_softc_by_hunique((u8_t*)pb->payload + off + sizeof(pt), len, netif);
|
||
|
break;
|
||
|
case PPPOE_TAG_ACCOOKIE:
|
||
|
if (ac_cookie == NULL) {
|
||
|
ac_cookie = (u8_t*)pb->payload + off + sizeof(pt);
|
||
|
ac_cookie_len = len;
|
||
|
}
|
||
|
break;
|
||
|
#if PPP_DEBUG
|
||
|
case PPPOE_TAG_SNAME_ERR:
|
||
|
err_msg = "SERVICE NAME ERROR";
|
||
|
break;
|
||
|
case PPPOE_TAG_ACSYS_ERR:
|
||
|
err_msg = "AC SYSTEM ERROR";
|
||
|
break;
|
||
|
case PPPOE_TAG_GENERIC_ERR:
|
||
|
err_msg = "GENERIC ERROR";
|
||
|
break;
|
||
|
#endif /* PPP_DEBUG */
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
#if PPP_DEBUG
|
||
|
if (err_msg != NULL) {
|
||
|
char error_tmp[PPPOE_ERRORSTRING_LEN];
|
||
|
u16_t error_len = LWIP_MIN(len, sizeof(error_tmp)-1);
|
||
|
strncpy(error_tmp, (char*)pb->payload + off + sizeof(pt), error_len);
|
||
|
error_tmp[error_len] = '\0';
|
||
|
if (sc) {
|
||
|
PPPDEBUG(LOG_DEBUG, ("pppoe: %c%c%"U16_F": %s: %s\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, err_msg, error_tmp));
|
||
|
} else {
|
||
|
PPPDEBUG(LOG_DEBUG, ("pppoe: %s: %s\n", err_msg, error_tmp));
|
||
|
}
|
||
|
}
|
||
|
#endif /* PPP_DEBUG */
|
||
|
off += sizeof(pt) + len;
|
||
|
}
|
||
|
|
||
|
breakbreak:;
|
||
|
switch (ph->code) {
|
||
|
case PPPOE_CODE_PADI:
|
||
|
#ifdef PPPOE_SERVER
|
||
|
/*
|
||
|
* got service name, concentrator name, and/or host unique.
|
||
|
* ignore if we have no interfaces with IFF_PASSIVE|IFF_UP.
|
||
|
*/
|
||
|
if (LIST_EMPTY(&pppoe_softc_list)) {
|
||
|
goto done;
|
||
|
}
|
||
|
LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
|
||
|
if (!(sc->sc_sppp.pp_if.if_flags & IFF_UP)) {
|
||
|
continue;
|
||
|
}
|
||
|
if (!(sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
|
||
|
continue;
|
||
|
}
|
||
|
if (sc->sc_state == PPPOE_STATE_INITIAL) {
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
if (sc == NULL) {
|
||
|
/* PPPDEBUG(LOG_DEBUG, ("pppoe: free passive interface is not found\n")); */
|
||
|
goto done;
|
||
|
}
|
||
|
if (hunique) {
|
||
|
if (sc->sc_hunique) {
|
||
|
mem_free(sc->sc_hunique);
|
||
|
}
|
||
|
sc->sc_hunique = mem_malloc(hunique_len);
|
||
|
if (sc->sc_hunique == NULL) {
|
||
|
goto done;
|
||
|
}
|
||
|
sc->sc_hunique_len = hunique_len;
|
||
|
MEMCPY(sc->sc_hunique, hunique, hunique_len);
|
||
|
}
|
||
|
MEMCPY(&sc->sc_dest, eh->ether_shost, sizeof sc->sc_dest);
|
||
|
sc->sc_state = PPPOE_STATE_PADO_SENT;
|
||
|
pppoe_send_pado(sc);
|
||
|
break;
|
||
|
#endif /* PPPOE_SERVER */
|
||
|
case PPPOE_CODE_PADR:
|
||
|
#ifdef PPPOE_SERVER
|
||
|
/*
|
||
|
* get sc from ac_cookie if IFF_PASSIVE
|
||
|
*/
|
||
|
if (ac_cookie == NULL) {
|
||
|
/* be quiet if there is not a single pppoe instance */
|
||
|
PPPDEBUG(LOG_DEBUG, ("pppoe: received PADR but not includes ac_cookie\n"));
|
||
|
goto done;
|
||
|
}
|
||
|
sc = pppoe_find_softc_by_hunique(ac_cookie, ac_cookie_len, netif);
|
||
|
if (sc == NULL) {
|
||
|
/* be quiet if there is not a single pppoe instance */
|
||
|
if (!LIST_EMPTY(&pppoe_softc_list)) {
|
||
|
PPPDEBUG(LOG_DEBUG, ("pppoe: received PADR but could not find request for it\n"));
|
||
|
}
|
||
|
goto done;
|
||
|
}
|
||
|
if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
|
||
|
PPPDEBUG(LOG_DEBUG, ("%c%c%"U16_F": received unexpected PADR\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
|
||
|
goto done;
|
||
|
}
|
||
|
if (hunique) {
|
||
|
if (sc->sc_hunique) {
|
||
|
mem_free(sc->sc_hunique);
|
||
|
}
|
||
|
sc->sc_hunique = mem_malloc(hunique_len);
|
||
|
if (sc->sc_hunique == NULL) {
|
||
|
goto done;
|
||
|
}
|
||
|
sc->sc_hunique_len = hunique_len;
|
||
|
MEMCPY(sc->sc_hunique, hunique, hunique_len);
|
||
|
}
|
||
|
pppoe_send_pads(sc);
|
||
|
sc->sc_state = PPPOE_STATE_SESSION;
|
||
|
ppp_start(sc->pcb); /* notify upper layers */
|
||
|
break;
|
||
|
#else
|
||
|
/* ignore, we are no access concentrator */
|
||
|
goto done;
|
||
|
#endif /* PPPOE_SERVER */
|
||
|
case PPPOE_CODE_PADO:
|
||
|
if (sc == NULL) {
|
||
|
/* be quiet if there is not a single pppoe instance */
|
||
|
if (pppoe_softc_list != NULL) {
|
||
|
PPPDEBUG(LOG_DEBUG, ("pppoe: received PADO but could not find request for it\n"));
|
||
|
}
|
||
|
goto done;
|
||
|
}
|
||
|
if (sc->sc_state != PPPOE_STATE_PADI_SENT) {
|
||
|
PPPDEBUG(LOG_DEBUG, ("%c%c%"U16_F": received unexpected PADO\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
|
||
|
goto done;
|
||
|
}
|
||
|
if (ac_cookie) {
|
||
|
sc->sc_ac_cookie_len = ac_cookie_len;
|
||
|
MEMCPY(sc->sc_ac_cookie, ac_cookie, ac_cookie_len);
|
||
|
}
|
||
|
MEMCPY(&sc->sc_dest, ethhdr->src.addr, sizeof(sc->sc_dest.addr));
|
||
|
sys_untimeout(pppoe_timeout, sc);
|
||
|
sc->sc_padr_retried = 0;
|
||
|
sc->sc_state = PPPOE_STATE_PADR_SENT;
|
||
|
if ((err = pppoe_send_padr(sc)) != 0) {
|
||
|
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));
|
||
|
}
|
||
|
sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
|
||
|
break;
|
||
|
case PPPOE_CODE_PADS:
|
||
|
if (sc == NULL) {
|
||
|
goto done;
|
||
|
}
|
||
|
sc->sc_session = session;
|
||
|
sys_untimeout(pppoe_timeout, sc);
|
||
|
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));
|
||
|
sc->sc_state = PPPOE_STATE_SESSION;
|
||
|
ppp_start(sc->pcb); /* notify upper layers */
|
||
|
break;
|
||
|
case PPPOE_CODE_PADT:
|
||
|
/* Don't disconnect here, we let the LCP Echo/Reply find the fact
|
||
|
* that PPP session is down. Asking the PPP stack to end the session
|
||
|
* require strict checking about the PPP phase to prevent endless
|
||
|
* disconnection loops.
|
||
|
*/
|
||
|
#if 0 /* UNUSED */
|
||
|
if (sc == NULL) { /* PADT frames are rarely sent with a hunique tag, this is actually almost always true */
|
||
|
goto done;
|
||
|
}
|
||
|
pppoe_clear_softc(sc, "received PADT");
|
||
|
#endif /* UNUSED */
|
||
|
break;
|
||
|
default:
|
||
|
if(sc) {
|
||
|
PPPDEBUG(LOG_DEBUG, ("%c%c%"U16_F": unknown code (0x%"X16_F") session = 0x%"X16_F"\n",
|
||
|
sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
|
||
|
(u16_t)ph->code, session));
|
||
|
} else {
|
||
|
PPPDEBUG(LOG_DEBUG, ("pppoe: unknown code (0x%"X16_F") session = 0x%"X16_F"\n", (u16_t)ph->code, session));
|
||
|
}
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
done:
|
||
|
pbuf_free(pb);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
void
|
||
|
pppoe_data_input(struct netif *netif, struct pbuf *pb)
|
||
|
{
|
||
|
u16_t session, plen;
|
||
|
struct pppoe_softc *sc;
|
||
|
struct pppoehdr *ph;
|
||
|
#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
|
||
|
u8_t shost[ETHER_ADDR_LEN];
|
||
|
#endif
|
||
|
|
||
|
#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
|
||
|
MEMCPY(shost, ((struct eth_hdr *)pb->payload)->src.addr, sizeof(shost));
|
||
|
#endif
|
||
|
if (pbuf_header(pb, -(s16_t)sizeof(struct eth_hdr)) != 0) {
|
||
|
/* bail out */
|
||
|
PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header failed\n"));
|
||
|
LINK_STATS_INC(link.lenerr);
|
||
|
goto drop;
|
||
|
}
|
||
|
|
||
|
if (pb->len < sizeof(*ph)) {
|
||
|
PPPDEBUG(LOG_DEBUG, ("pppoe_data_input: could not get PPPoE header\n"));
|
||
|
goto drop;
|
||
|
}
|
||
|
ph = (struct pppoehdr *)pb->payload;
|
||
|
|
||
|
if (ph->vertype != PPPOE_VERTYPE) {
|
||
|
PPPDEBUG(LOG_DEBUG, ("pppoe (data): unknown version/type packet: 0x%x\n", ph->vertype));
|
||
|
goto drop;
|
||
|
}
|
||
|
if (ph->code != 0) {
|
||
|
goto drop;
|
||
|
}
|
||
|
|
||
|
session = ntohs(ph->session);
|
||
|
sc = pppoe_find_softc_by_session(session, netif);
|
||
|
if (sc == NULL) {
|
||
|
#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
|
||
|
PPPDEBUG(LOG_DEBUG, ("pppoe: input for unknown session 0x%x, sending PADT\n", session));
|
||
|
pppoe_send_padt(netif, session, shost);
|
||
|
#endif
|
||
|
goto drop;
|
||
|
}
|
||
|
|
||
|
plen = ntohs(ph->plen);
|
||
|
|
||
|
if (pbuf_header(pb, -(s16_t)(PPPOE_HEADERLEN)) != 0) {
|
||
|
/* bail out */
|
||
|
PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header PPPOE_HEADERLEN failed\n"));
|
||
|
LINK_STATS_INC(link.lenerr);
|
||
|
goto drop;
|
||
|
}
|
||
|
|
||
|
PPPDEBUG(LOG_DEBUG, ("pppoe_data_input: %c%c%"U16_F": pkthdr.len=%d, pppoe.len=%d\n",
|
||
|
sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
|
||
|
pb->len, plen));
|
||
|
|
||
|
if (pb->tot_len < plen) {
|
||
|
goto drop;
|
||
|
}
|
||
|
|
||
|
/* Dispatch the packet thereby consuming it. */
|
||
|
ppp_input(sc->pcb, pb);
|
||
|
return;
|
||
|
|
||
|
drop:
|
||
|
pbuf_free(pb);
|
||
|
}
|
||
|
|
||
|
static err_t
|
||
|
pppoe_output(struct pppoe_softc *sc, struct pbuf *pb)
|
||
|
{
|
||
|
struct eth_hdr *ethhdr;
|
||
|
u16_t etype;
|
||
|
err_t res;
|
||
|
|
||
|
if (!sc->sc_ethif) {
|
||
|
pbuf_free(pb);
|
||
|
return ERR_IF;
|
||
|
}
|
||
|
|
||
|
/* make room for Ethernet header - should not fail */
|
||
|
if (pbuf_header(pb, (s16_t)(sizeof(struct eth_hdr))) != 0) {
|
||
|
/* bail out */
|
||
|
PPPDEBUG(LOG_ERR, ("pppoe: %c%c%"U16_F": pppoe_output: could not allocate room for Ethernet header\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
|
||
|
LINK_STATS_INC(link.lenerr);
|
||
|
pbuf_free(pb);
|
||
|
return ERR_BUF;
|
||
|
}
|
||
|
ethhdr = (struct eth_hdr *)pb->payload;
|
||
|
etype = sc->sc_state == PPPOE_STATE_SESSION ? ETHTYPE_PPPOE : ETHTYPE_PPPOEDISC;
|
||
|
ethhdr->type = htons(etype);
|
||
|
MEMCPY(ðhdr->dest.addr, &sc->sc_dest.addr, sizeof(ethhdr->dest.addr));
|
||
|
MEMCPY(ðhdr->src.addr, &sc->sc_ethif->hwaddr, sizeof(ethhdr->src.addr));
|
||
|
|
||
|
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",
|
||
|
sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, etype,
|
||
|
sc->sc_state, sc->sc_session,
|
||
|
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],
|
||
|
pb->tot_len));
|
||
|
|
||
|
res = sc->sc_ethif->linkoutput(sc->sc_ethif, pb);
|
||
|
|
||
|
pbuf_free(pb);
|
||
|
|
||
|
return res;
|
||
|
}
|
||
|
|
||
|
static err_t
|
||
|
pppoe_send_padi(struct pppoe_softc *sc)
|
||
|
{
|
||
|
struct pbuf *pb;
|
||
|
u8_t *p;
|
||
|
int len;
|
||
|
#ifdef PPPOE_TODO
|
||
|
int l1 = 0, l2 = 0; /* XXX: gcc */
|
||
|
#endif /* PPPOE_TODO */
|
||
|
|
||
|
if (sc->sc_state >PPPOE_STATE_PADI_SENT) {
|
||
|
PPPDEBUG(LOG_ERR, ("ERROR: pppoe_send_padi in state %d", sc->sc_state));
|
||
|
}
|
||
|
|
||
|
/* calculate length of frame (excluding ethernet header + pppoe header) */
|
||
|
len = 2 + 2 + 2 + 2 + sizeof sc; /* service name tag is required, host unique is send too */
|
||
|
#ifdef PPPOE_TODO
|
||
|
if (sc->sc_service_name != NULL) {
|
||
|
l1 = (int)strlen(sc->sc_service_name);
|
||
|
len += l1;
|
||
|
}
|
||
|
if (sc->sc_concentrator_name != NULL) {
|
||
|
l2 = (int)strlen(sc->sc_concentrator_name);
|
||
|
len += 2 + 2 + l2;
|
||
|
}
|
||
|
#endif /* PPPOE_TODO */
|
||
|
LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
|
||
|
sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
|
||
|
|
||
|
/* allocate a buffer */
|
||
|
pb = pbuf_alloc(PBUF_LINK, (u16_t)(PPPOE_HEADERLEN + len), PBUF_RAM);
|
||
|
if (!pb) {
|
||
|
return ERR_MEM;
|
||
|
}
|
||
|
LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
|
||
|
|
||
|
p = (u8_t*)pb->payload;
|
||
|
/* fill in pkt */
|
||
|
PPPOE_ADD_HEADER(p, PPPOE_CODE_PADI, 0, (u16_t)len);
|
||
|
PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
|
||
|
#ifdef PPPOE_TODO
|
||
|
if (sc->sc_service_name != NULL) {
|
||
|
PPPOE_ADD_16(p, l1);
|
||
|
MEMCPY(p, sc->sc_service_name, l1);
|
||
|
p += l1;
|
||
|
} else
|
||
|
#endif /* PPPOE_TODO */
|
||
|
{
|
||
|
PPPOE_ADD_16(p, 0);
|
||
|
}
|
||
|
#ifdef PPPOE_TODO
|
||
|
if (sc->sc_concentrator_name != NULL) {
|
||
|
PPPOE_ADD_16(p, PPPOE_TAG_ACNAME);
|
||
|
PPPOE_ADD_16(p, l2);
|
||
|
MEMCPY(p, sc->sc_concentrator_name, l2);
|
||
|
p += l2;
|
||
|
}
|
||
|
#endif /* PPPOE_TODO */
|
||
|
PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
|
||
|
PPPOE_ADD_16(p, sizeof(sc));
|
||
|
MEMCPY(p, &sc, sizeof sc);
|
||
|
|
||
|
/* send pkt */
|
||
|
return pppoe_output(sc, pb);
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
pppoe_timeout(void *arg)
|
||
|
{
|
||
|
u32_t retry_wait;
|
||
|
int err;
|
||
|
struct pppoe_softc *sc = (struct pppoe_softc*)arg;
|
||
|
|
||
|
PPPDEBUG(LOG_DEBUG, ("pppoe: %c%c%"U16_F": timeout\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
|
||
|
|
||
|
switch (sc->sc_state) {
|
||
|
case PPPOE_STATE_PADI_SENT:
|
||
|
/*
|
||
|
* We have two basic ways of retrying:
|
||
|
* - Quick retry mode: try a few times in short sequence
|
||
|
* - Slow retry mode: we already had a connection successfully
|
||
|
* established and will try infinitely (without user
|
||
|
* intervention)
|
||
|
* We only enter slow retry mode if IFF_LINK1 (aka autodial)
|
||
|
* is not set.
|
||
|
*/
|
||
|
if (sc->sc_padi_retried < 0xff) {
|
||
|
sc->sc_padi_retried++;
|
||
|
}
|
||
|
if (!sc->pcb->settings.persist && sc->sc_padi_retried >= PPPOE_DISC_MAXPADI) {
|
||
|
#if 0
|
||
|
if ((sc->sc_sppp.pp_if.if_flags & IFF_LINK1) == 0) {
|
||
|
/* slow retry mode */
|
||
|
retry_wait = PPPOE_SLOW_RETRY;
|
||
|
} else
|
||
|
#endif
|
||
|
{
|
||
|
pppoe_abort_connect(sc);
|
||
|
return;
|
||
|
}
|
||
|
}
|
||
|
/* initialize for quick retry mode */
|
||
|
retry_wait = LWIP_MIN(PPPOE_DISC_TIMEOUT * sc->sc_padi_retried, PPPOE_SLOW_RETRY);
|
||
|
if ((err = pppoe_send_padi(sc)) != 0) {
|
||
|
sc->sc_padi_retried--;
|
||
|
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));
|
||
|
}
|
||
|
sys_timeout(retry_wait, pppoe_timeout, sc);
|
||
|
break;
|
||
|
|
||
|
case PPPOE_STATE_PADR_SENT:
|
||
|
sc->sc_padr_retried++;
|
||
|
if (sc->sc_padr_retried >= PPPOE_DISC_MAXPADR) {
|
||
|
MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
|
||
|
sc->sc_state = PPPOE_STATE_PADI_SENT;
|
||
|
sc->sc_padr_retried = 0;
|
||
|
if ((err = pppoe_send_padi(sc)) != 0) {
|
||
|
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));
|
||
|
}
|
||
|
sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried), pppoe_timeout, sc);
|
||
|
return;
|
||
|
}
|
||
|
if ((err = pppoe_send_padr(sc)) != 0) {
|
||
|
sc->sc_padr_retried--;
|
||
|
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));
|
||
|
}
|
||
|
sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
|
||
|
break;
|
||
|
default:
|
||
|
return; /* all done, work in peace */
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* Start a connection (i.e. initiate discovery phase) */
|
||
|
static err_t
|
||
|
pppoe_connect(ppp_pcb *ppp, void *ctx)
|
||
|
{
|
||
|
int err;
|
||
|
struct pppoe_softc *sc = (struct pppoe_softc *)ctx;
|
||
|
lcp_options *lcp_wo;
|
||
|
lcp_options *lcp_ao;
|
||
|
#if PPP_IPV4_SUPPORT && VJ_SUPPORT
|
||
|
ipcp_options *ipcp_wo;
|
||
|
ipcp_options *ipcp_ao;
|
||
|
#endif /* PPP_IPV4_SUPPORT && VJ_SUPPORT */
|
||
|
|
||
|
if (sc->sc_state != PPPOE_STATE_INITIAL) {
|
||
|
return EBUSY;
|
||
|
}
|
||
|
|
||
|
/* stop any timer */
|
||
|
sys_untimeout(pppoe_timeout, sc);
|
||
|
sc->sc_session = 0;
|
||
|
sc->sc_padi_retried = 0;
|
||
|
sc->sc_padr_retried = 0;
|
||
|
#ifdef PPPOE_SERVER
|
||
|
/* wait PADI if IFF_PASSIVE */
|
||
|
if ((sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
|
||
|
return 0;
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
ppp_clear(ppp);
|
||
|
|
||
|
lcp_wo = &ppp->lcp_wantoptions;
|
||
|
lcp_wo->mru = sc->sc_ethif->mtu-PPPOE_HEADERLEN-2; /* two byte PPP protocol discriminator, then IP data */
|
||
|
lcp_wo->neg_asyncmap = 0;
|
||
|
lcp_wo->neg_pcompression = 0;
|
||
|
lcp_wo->neg_accompression = 0;
|
||
|
|
||
|
lcp_ao = &ppp->lcp_allowoptions;
|
||
|
lcp_ao->mru = sc->sc_ethif->mtu-PPPOE_HEADERLEN-2; /* two byte PPP protocol discriminator, then IP data */
|
||
|
lcp_ao->neg_asyncmap = 0;
|
||
|
lcp_ao->neg_pcompression = 0;
|
||
|
lcp_ao->neg_accompression = 0;
|
||
|
|
||
|
#if PPP_IPV4_SUPPORT && VJ_SUPPORT
|
||
|
ipcp_wo = &ppp->ipcp_wantoptions;
|
||
|
ipcp_wo->neg_vj = 0;
|
||
|
ipcp_wo->old_vj = 0;
|
||
|
|
||
|
ipcp_ao = &ppp->ipcp_allowoptions;
|
||
|
ipcp_ao->neg_vj = 0;
|
||
|
ipcp_ao->old_vj = 0;
|
||
|
#endif /* PPP_IPV4_SUPPORT && VJ_SUPPORT */
|
||
|
|
||
|
/* save state, in case we fail to send PADI */
|
||
|
sc->sc_state = PPPOE_STATE_PADI_SENT;
|
||
|
if ((err = pppoe_send_padi(sc)) != 0) {
|
||
|
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));
|
||
|
}
|
||
|
sys_timeout(PPPOE_DISC_TIMEOUT, pppoe_timeout, sc);
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
/* disconnect */
|
||
|
static void
|
||
|
pppoe_disconnect(ppp_pcb *ppp, void *ctx)
|
||
|
{
|
||
|
struct pppoe_softc *sc = (struct pppoe_softc *)ctx;
|
||
|
|
||
|
if (sc->sc_state < PPPOE_STATE_SESSION) {
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
PPPDEBUG(LOG_DEBUG, ("pppoe: %c%c%"U16_F": disconnecting\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
|
||
|
pppoe_send_padt(sc->sc_ethif, sc->sc_session, (const u8_t *)&sc->sc_dest);
|
||
|
|
||
|
/* cleanup softc */
|
||
|
sc->sc_state = PPPOE_STATE_INITIAL;
|
||
|
MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
|
||
|
sc->sc_ac_cookie_len = 0;
|
||
|
#ifdef PPPOE_SERVER
|
||
|
if (sc->sc_hunique) {
|
||
|
mem_free(sc->sc_hunique);
|
||
|
sc->sc_hunique = NULL;
|
||
|
}
|
||
|
sc->sc_hunique_len = 0;
|
||
|
#endif
|
||
|
sc->sc_session = 0;
|
||
|
sc->sc_padi_retried = 0;
|
||
|
sc->sc_padr_retried = 0;
|
||
|
|
||
|
ppp_link_end(ppp); /* notify upper layers */
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
/* Connection attempt aborted */
|
||
|
static void
|
||
|
pppoe_abort_connect(struct pppoe_softc *sc)
|
||
|
{
|
||
|
PPPDEBUG(LOG_DEBUG, ("%c%c%"U16_F": could not establish connection\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
|
||
|
|
||
|
/* clear connection state */
|
||
|
sc->sc_state = PPPOE_STATE_INITIAL;
|
||
|
MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
|
||
|
sc->sc_ac_cookie_len = 0;
|
||
|
sc->sc_session = 0;
|
||
|
sc->sc_padi_retried = 0;
|
||
|
sc->sc_padr_retried = 0;
|
||
|
|
||
|
ppp_link_failed(sc->pcb); /* notify upper layers */
|
||
|
}
|
||
|
|
||
|
/* Send a PADR packet */
|
||
|
static err_t
|
||
|
pppoe_send_padr(struct pppoe_softc *sc)
|
||
|
{
|
||
|
struct pbuf *pb;
|
||
|
u8_t *p;
|
||
|
size_t len;
|
||
|
#ifdef PPPOE_TODO
|
||
|
size_t l1 = 0; /* XXX: gcc */
|
||
|
#endif /* PPPOE_TODO */
|
||
|
|
||
|
if (sc->sc_state != PPPOE_STATE_PADR_SENT) {
|
||
|
return ERR_CONN;
|
||
|
}
|
||
|
|
||
|
len = 2 + 2 + 2 + 2 + sizeof(sc); /* service name, host unique */
|
||
|
#ifdef PPPOE_TODO
|
||
|
if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
|
||
|
l1 = strlen(sc->sc_service_name);
|
||
|
len += l1;
|
||
|
}
|
||
|
#endif /* PPPOE_TODO */
|
||
|
if (sc->sc_ac_cookie_len > 0) {
|
||
|
len += 2 + 2 + sc->sc_ac_cookie_len; /* AC cookie */
|
||
|
}
|
||
|
LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
|
||
|
sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
|
||
|
pb = pbuf_alloc(PBUF_LINK, (u16_t)(PPPOE_HEADERLEN + len), PBUF_RAM);
|
||
|
if (!pb) {
|
||
|
return ERR_MEM;
|
||
|
}
|
||
|
LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
|
||
|
p = (u8_t*)pb->payload;
|
||
|
PPPOE_ADD_HEADER(p, PPPOE_CODE_PADR, 0, len);
|
||
|
PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
|
||
|
#ifdef PPPOE_TODO
|
||
|
if (sc->sc_service_name != NULL) {
|
||
|
PPPOE_ADD_16(p, l1);
|
||
|
MEMCPY(p, sc->sc_service_name, l1);
|
||
|
p += l1;
|
||
|
} else
|
||
|
#endif /* PPPOE_TODO */
|
||
|
{
|
||
|
PPPOE_ADD_16(p, 0);
|
||
|
}
|
||
|
if (sc->sc_ac_cookie_len > 0) {
|
||
|
PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
|
||
|
PPPOE_ADD_16(p, sc->sc_ac_cookie_len);
|
||
|
MEMCPY(p, sc->sc_ac_cookie, sc->sc_ac_cookie_len);
|
||
|
p += sc->sc_ac_cookie_len;
|
||
|
}
|
||
|
PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
|
||
|
PPPOE_ADD_16(p, sizeof(sc));
|
||
|
MEMCPY(p, &sc, sizeof sc);
|
||
|
|
||
|
return pppoe_output(sc, pb);
|
||
|
}
|
||
|
|
||
|
/* send a PADT packet */
|
||
|
static err_t
|
||
|
pppoe_send_padt(struct netif *outgoing_if, u_int session, const u8_t *dest)
|
||
|
{
|
||
|
struct pbuf *pb;
|
||
|
struct eth_hdr *ethhdr;
|
||
|
err_t res;
|
||
|
u8_t *p;
|
||
|
|
||
|
pb = pbuf_alloc(PBUF_LINK, (u16_t)(PPPOE_HEADERLEN), PBUF_RAM);
|
||
|
if (!pb) {
|
||
|
return ERR_MEM;
|
||
|
}
|
||
|
LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
|
||
|
|
||
|
pbuf_header(pb, (s16_t)sizeof(struct eth_hdr));
|
||
|
ethhdr = (struct eth_hdr *)pb->payload;
|
||
|
ethhdr->type = PP_HTONS(ETHTYPE_PPPOEDISC);
|
||
|
MEMCPY(ðhdr->dest.addr, dest, sizeof(ethhdr->dest.addr));
|
||
|
MEMCPY(ðhdr->src.addr, &outgoing_if->hwaddr, sizeof(ethhdr->src.addr));
|
||
|
|
||
|
p = (u8_t*)(ethhdr + 1);
|
||
|
PPPOE_ADD_HEADER(p, PPPOE_CODE_PADT, session, 0);
|
||
|
|
||
|
res = outgoing_if->linkoutput(outgoing_if, pb);
|
||
|
|
||
|
pbuf_free(pb);
|
||
|
|
||
|
return res;
|
||
|
}
|
||
|
|
||
|
#ifdef PPPOE_SERVER
|
||
|
static err_t
|
||
|
pppoe_send_pado(struct pppoe_softc *sc)
|
||
|
{
|
||
|
struct pbuf *pb;
|
||
|
u8_t *p;
|
||
|
size_t len;
|
||
|
|
||
|
if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
|
||
|
return ERR_CONN;
|
||
|
}
|
||
|
|
||
|
/* calc length */
|
||
|
len = 0;
|
||
|
/* include ac_cookie */
|
||
|
len += 2 + 2 + sizeof(sc);
|
||
|
/* include hunique */
|
||
|
len += 2 + 2 + sc->sc_hunique_len;
|
||
|
pb = pbuf_alloc(PBUF_LINK, (u16_t)(PPPOE_HEADERLEN + len), PBUF_RAM);
|
||
|
if (!pb) {
|
||
|
return ERR_MEM;
|
||
|
}
|
||
|
LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
|
||
|
p = (u8_t*)pb->payload;
|
||
|
PPPOE_ADD_HEADER(p, PPPOE_CODE_PADO, 0, len);
|
||
|
PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
|
||
|
PPPOE_ADD_16(p, sizeof(sc));
|
||
|
MEMCPY(p, &sc, sizeof(sc));
|
||
|
p += sizeof(sc);
|
||
|
PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
|
||
|
PPPOE_ADD_16(p, sc->sc_hunique_len);
|
||
|
MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
|
||
|
return pppoe_output(sc, pb);
|
||
|
}
|
||
|
|
||
|
static err_t
|
||
|
pppoe_send_pads(struct pppoe_softc *sc)
|
||
|
{
|
||
|
struct pbuf *pb;
|
||
|
u8_t *p;
|
||
|
size_t len, l1 = 0; /* XXX: gcc */
|
||
|
|
||
|
if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
|
||
|
return ERR_CONN;
|
||
|
}
|
||
|
|
||
|
sc->sc_session = mono_time.tv_sec % 0xff + 1;
|
||
|
/* calc length */
|
||
|
len = 0;
|
||
|
/* include hunique */
|
||
|
len += 2 + 2 + 2 + 2 + sc->sc_hunique_len; /* service name, host unique*/
|
||
|
if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
|
||
|
l1 = strlen(sc->sc_service_name);
|
||
|
len += l1;
|
||
|
}
|
||
|
pb = pbuf_alloc(PBUF_LINK, (u16_t)(PPPOE_HEADERLEN + len), PBUF_RAM);
|
||
|
if (!pb) {
|
||
|
return ERR_MEM;
|
||
|
}
|
||
|
LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
|
||
|
p = (u8_t*)pb->payload;
|
||
|
PPPOE_ADD_HEADER(p, PPPOE_CODE_PADS, sc->sc_session, len);
|
||
|
PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
|
||
|
if (sc->sc_service_name != NULL) {
|
||
|
PPPOE_ADD_16(p, l1);
|
||
|
MEMCPY(p, sc->sc_service_name, l1);
|
||
|
p += l1;
|
||
|
} else {
|
||
|
PPPOE_ADD_16(p, 0);
|
||
|
}
|
||
|
PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
|
||
|
PPPOE_ADD_16(p, sc->sc_hunique_len);
|
||
|
MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
|
||
|
return pppoe_output(sc, pb);
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
static err_t
|
||
|
pppoe_xmit(struct pppoe_softc *sc, struct pbuf *pb)
|
||
|
{
|
||
|
u8_t *p;
|
||
|
size_t len;
|
||
|
|
||
|
/* are we ready to process data yet? */
|
||
|
if (sc->sc_state < PPPOE_STATE_SESSION) {
|
||
|
/*sppp_flush(&sc->sc_sppp.pp_if);*/
|
||
|
pbuf_free(pb);
|
||
|
return ERR_CONN;
|
||
|
}
|
||
|
|
||
|
len = pb->tot_len;
|
||
|
|
||
|
/* make room for PPPoE header - should not fail */
|
||
|
if (pbuf_header(pb, (s16_t)(PPPOE_HEADERLEN)) != 0) {
|
||
|
/* bail out */
|
||
|
PPPDEBUG(LOG_ERR, ("pppoe: %c%c%"U16_F": pppoe_xmit: could not allocate room for PPPoE header\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
|
||
|
LINK_STATS_INC(link.lenerr);
|
||
|
pbuf_free(pb);
|
||
|
return ERR_BUF;
|
||
|
}
|
||
|
|
||
|
p = (u8_t*)pb->payload;
|
||
|
PPPOE_ADD_HEADER(p, 0, sc->sc_session, len);
|
||
|
|
||
|
return pppoe_output(sc, pb);
|
||
|
}
|
||
|
|
||
|
#if 0 /*def PFIL_HOOKS*/
|
||
|
static int
|
||
|
pppoe_ifattach_hook(void *arg, struct pbuf **mp, struct netif *ifp, int dir)
|
||
|
{
|
||
|
struct pppoe_softc *sc;
|
||
|
int s;
|
||
|
|
||
|
if (mp != (struct pbuf **)PFIL_IFNET_DETACH) {
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
|
||
|
if (sc->sc_ethif != ifp) {
|
||
|
continue;
|
||
|
}
|
||
|
if (sc->sc_sppp.pp_if.if_flags & IFF_UP) {
|
||
|
sc->sc_sppp.pp_if.if_flags &= ~(IFF_UP|IFF_RUNNING);
|
||
|
PPPDEBUG(LOG_DEBUG, ("%c%c%"U16_F": ethernet interface detached, going down\n",
|
||
|
sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
|
||
|
}
|
||
|
sc->sc_ethif = NULL;
|
||
|
pppoe_clear_softc(sc, "ethernet interface detached");
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
#if 0 /* UNUSED */
|
||
|
static void
|
||
|
pppoe_clear_softc(struct pppoe_softc *sc, const char *message)
|
||
|
{
|
||
|
LWIP_UNUSED_ARG(message);
|
||
|
|
||
|
/* stop timer */
|
||
|
sys_untimeout(pppoe_timeout, sc);
|
||
|
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));
|
||
|
/* fix our state */
|
||
|
sc->sc_state = PPPOE_STATE_INITIAL;
|
||
|
|
||
|
/* notify upper layers */
|
||
|
ppp_link_end(sc->pcb); /* /!\ dangerous /!\ */
|
||
|
|
||
|
/* clean up softc */
|
||
|
MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
|
||
|
sc->sc_ac_cookie_len = 0;
|
||
|
sc->sc_session = 0;
|
||
|
sc->sc_padi_retried = 0;
|
||
|
sc->sc_padr_retried = 0;
|
||
|
}
|
||
|
#endif /* UNUSED */
|
||
|
#endif /* PPP_SUPPORT && PPPOE_SUPPORT */
|