+++ /dev/null
-/*****************************************************************************
-* ppp_oe.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 PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */
-
-#include "netif/ppp_oe.h"
-
-#include "ppp_impl.h"
-#include "pppdebug.h"
-
-#include "lwip/timers.h"
-#include "lwip/memp.h"
-
-#include <string.h>
-#include <stdio.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
-
-#ifndef PPPOE_ERRORSTRING_LEN
-#define PPPOE_ERRORSTRING_LEN 64
-#endif
-static char pppoe_error_tmp[PPPOE_ERRORSTRING_LEN];
-
-
-/* input routines */
-static void pppoe_dispatch_disc_pkt(struct netif *, struct pbuf *);
-
-/* management routines */
-static int pppoe_do_disconnect(struct pppoe_softc *);
-static void pppoe_abort_connect(struct pppoe_softc *);
-static void pppoe_clear_softc(struct pppoe_softc *, const char *);
-
-/* 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 struct pppoe_softc * pppoe_find_softc_by_session(u_int, struct netif *);
-static struct pppoe_softc * pppoe_find_softc_by_hunique(u8_t *, size_t, struct netif *);
-
-/** linked list of created pppoe interfaces */
-static struct pppoe_softc *pppoe_softc_list;
-
-err_t
-pppoe_create(struct netif *ethif, int pd, void (*linkStatusCB)(int pd, int up), struct pppoe_softc **scptr)
-{
- struct pppoe_softc *sc;
-
- sc = (struct pppoe_softc *)memp_malloc(MEMP_PPPOE_IF);
- if (sc == NULL) {
- *scptr = NULL;
- return ERR_MEM;
- }
- memset(sc, 0, sizeof(struct pppoe_softc));
-
- /* changed to real address later */
- MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
-
- sc->sc_pd = pd;
- sc->sc_linkStatusCB = linkStatusCB;
- sc->sc_ethif = ethif;
-
- /* put the new interface at the head of the list */
- sc->next = pppoe_softc_list;
- pppoe_softc_list = sc;
-
- *scptr = sc;
-
- return ERR_OK;
-}
-
-err_t
-pppoe_destroy(struct netif *ifp)
-{
- struct pppoe_softc *sc, *prev = NULL;
-
- for (sc = pppoe_softc_list; sc != NULL; prev = sc, sc = sc->next) {
- if (sc->sc_ethif == ifp) {
- break;
- }
- }
-
- if(!(sc && (sc->sc_ethif == ifp))) {
- return ERR_IF;
- }
-
- sys_untimeout(pppoe_timeout, sc);
- if (prev == NULL) {
- /* remove sc from the head of the list */
- pppoe_softc_list = sc->next;
- } else {
- /* remove sc from the list */
- prev->next = sc->next;
- }
-
-#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) {
- if (sc->sc_ethif == rcvif) {
- return sc;
- } else {
- return NULL;
- }
- }
- }
- 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) {
- printf("%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) {
- printf("%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;
-}
-
-static void
-pppoe_linkstatus_up(struct pppoe_softc *sc)
-{
- sc->sc_linkStatusCB(sc->sc_pd, 1);
-}
-
-/* analyze and handle a single received packet while not in session state */
-static void
-pppoe_dispatch_disc_pkt(struct netif *netif, struct pbuf *pb)
-{
- u16_t tag, len;
- u16_t session, plen;
- struct pppoe_softc *sc;
- const char *err_msg;
- char devname[6];
- 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, errortag;
- struct eth_hdr *ethhdr;
-
- pb = pppSingleBuf(pb);
-
- strcpy(devname, "pppoe"); /* as long as we don't know which instance */
- err_msg = NULL;
- errortag = 0;
- 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 < PPPOE_HEADERLEN) {
- printf("pppoe: packet too short: %d\n", pb->len);
- goto done;
- }
-
- ph = (struct pppoehdr *) (ethhdr + 1);
- if (ph->vertype != PPPOE_VERTYPE) {
- printf("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) {
- printf("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) {
- printf("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);
- if (sc != NULL) {
- snprintf(devname, sizeof(devname), "%c%c%"U16_F, sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
- }
- break;
- case PPPOE_TAG_ACCOOKIE:
- if (ac_cookie == NULL) {
- ac_cookie = (u8_t*)pb->payload + off + sizeof(pt);
- ac_cookie_len = len;
- }
- break;
- case PPPOE_TAG_SNAME_ERR:
- err_msg = "SERVICE NAME ERROR";
- errortag = 1;
- break;
- case PPPOE_TAG_ACSYS_ERR:
- err_msg = "AC SYSTEM ERROR";
- errortag = 1;
- break;
- case PPPOE_TAG_GENERIC_ERR:
- err_msg = "GENERIC ERROR";
- errortag = 1;
- break;
- }
- if (err_msg) {
- if (errortag && len) {
- u16_t error_len = LWIP_MIN(len, sizeof(pppoe_error_tmp)-1);
- strncpy(pppoe_error_tmp, (char*)pb->payload + off + sizeof(pt), error_len);
- pppoe_error_tmp[error_len-1] = '\0';
- printf("%s: %s: %s\n", devname, err_msg, pppoe_error_tmp);
- } else {
- printf("%s: %s\n", devname, err_msg);
- }
- if (errortag) {
- goto done;
- }
- }
- 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) {
- /* printf("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 */
- printf("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)) {
- printf("pppoe: received PADR but could not find request for it\n");
- }
- goto done;
- }
- if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
- printf("%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;
- pppoe_linkstatus_up(sc); /* 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) {
- printf("pppoe: received PADO but could not find request for it\n");
- }
- goto done;
- }
- if (sc->sc_state != PPPOE_STATE_PADI_SENT) {
- printf("%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;
- pppoe_linkstatus_up(sc); /* notify upper layers */
- break;
- case PPPOE_CODE_PADT:
- if (sc == NULL) {
- goto done;
- }
- pppoe_clear_softc(sc, "received PADT");
- break;
- default:
- if(sc) {
- printf("%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 {
- printf("pppoe: unknown code (0x%"X16_F") session = 0x%"X16_F"\n", (u16_t)ph->code, session);
- }
- break;
- }
-
-done:
- pbuf_free(pb);
- return;
-}
-
-void
-pppoe_disc_input(struct netif *netif, struct pbuf *p)
-{
- /* avoid error messages if there is not a single pppoe instance */
- if (pppoe_softc_list != NULL) {
- pppoe_dispatch_disc_pkt(netif, p);
- } else {
- pbuf_free(p);
- }
-}
-
-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, -(int)sizeof(struct eth_hdr)) != 0) {
- /* bail out */
- PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header failed\n"));
- LINK_STATS_INC(link.lenerr);
- goto drop;
- }
-
- pb = pppSingleBuf (pb);
-
- if (pb->len <= PPPOE_HEADERLEN) {
- printf("pppoe (data): dropping too short packet: %d bytes\n", pb->len);
- goto drop;
- }
-
- if (pb->len < sizeof(*ph)) {
- printf("pppoe_data_input: could not get PPPoE header\n");
- goto drop;
- }
- ph = (struct pppoehdr *)pb->payload;
-
- if (ph->vertype != PPPOE_VERTYPE) {
- printf("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
- printf("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, -(int)(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->len < plen) {
- goto drop;
- }
-
- pppInProcOverEthernet(sc->sc_pd, 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;
- }
-
- ethhdr = (struct eth_hdr *)pb->payload;
- etype = sc->sc_state == PPPOE_STATE_SESSION ? ETHTYPE_PPPOE : ETHTYPE_PPPOEDISC;
- ethhdr->type = htons(etype);
- MEMCPY(ethhdr->dest.addr, sc->sc_dest.addr, sizeof(ethhdr->dest.addr));
- MEMCPY(ethhdr->src.addr, ((struct eth_addr *)sc->sc_ethif->hwaddr)->addr, 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)(sizeof(struct eth_hdr) + 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 + sizeof (struct eth_hdr);
- /* 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)
-{
- int retry_wait, 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.
- */
-
- /* initialize for quick retry mode */
- retry_wait = PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried);
-
- sc->sc_padi_retried++;
- if (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;
- }
- }
- 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;
- case PPPOE_STATE_CLOSING:
- pppoe_do_disconnect(sc);
- break;
- default:
- return; /* all done, work in peace */
- }
-}
-
-/* Start a connection (i.e. initiate discovery phase) */
-int
-pppoe_connect(struct pppoe_softc *sc)
-{
- int err;
-
- if (sc->sc_state != PPPOE_STATE_INITIAL) {
- return EBUSY;
- }
-
-#ifdef PPPOE_SERVER
- /* wait PADI if IFF_PASSIVE */
- if ((sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
- return 0;
- }
-#endif
- /* save state, in case we fail to send PADI */
- sc->sc_state = PPPOE_STATE_PADI_SENT;
- sc->sc_padr_retried = 0;
- err = pppoe_send_padi(sc);
- 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 */
-void
-pppoe_disconnect(struct pppoe_softc *sc)
-{
- if (sc->sc_state < PPPOE_STATE_SESSION) {
- return;
- }
- /*
- * Do not call pppoe_disconnect here, the upper layer state
- * machine gets confused by this. We must return from this
- * function and defer disconnecting to the timeout handler.
- */
- sc->sc_state = PPPOE_STATE_CLOSING;
- sys_timeout(20, pppoe_timeout, sc);
-}
-
-static int
-pppoe_do_disconnect(struct pppoe_softc *sc)
-{
- int err;
-
- if (sc->sc_state < PPPOE_STATE_SESSION) {
- err = EBUSY;
- } else {
- PPPDEBUG(LOG_DEBUG, ("pppoe: %c%c%"U16_F": disconnecting\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
- err = 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_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
-
- return err;
-}
-
-/* Connection attempt aborted */
-static void
-pppoe_abort_connect(struct pppoe_softc *sc)
-{
- printf("%c%c%"U16_F": could not establish connection\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
- sc->sc_state = PPPOE_STATE_CLOSING;
-
- sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
-
- /* clear connection state */
- MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
- sc->sc_state = PPPOE_STATE_INITIAL;
-}
-
-/* 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)(sizeof(struct eth_hdr) + 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 + sizeof (struct eth_hdr);
- 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, sizeof(struct eth_hdr) + PPPOE_HEADERLEN, PBUF_RAM);
- if (!pb) {
- return ERR_MEM;
- }
- LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
-
- ethhdr = (struct eth_hdr *)pb->payload;
- ethhdr->type = PP_HTONS(ETHTYPE_PPPOEDISC);
- MEMCPY(ethhdr->dest.addr, dest, sizeof(ethhdr->dest.addr));
- MEMCPY(ethhdr->src.addr, ((struct eth_addr *)outgoing_if->hwaddr)->addr, 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, sizeof(struct eth_hdr) + 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 + sizeof (struct eth_hdr);
- 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, sizeof(struct eth_hdr) + 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 + sizeof (struct eth_hdr);
- 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
-
-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 Ethernet header - should not fail */
- if (pbuf_header(pb, sizeof(struct eth_hdr) + PPPOE_HEADERLEN) != 0) {
- /* bail out */
- 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));
- LINK_STATS_INC(link.lenerr);
- pbuf_free(pb);
- return ERR_BUF;
- }
-
- p = (u8_t*)pb->payload + sizeof(struct eth_hdr);
- 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);
- printf("%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
-
-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 */
- sc->sc_linkStatusCB(sc->sc_pd, 0);
-
- /* clean up softc */
- MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
- sc->sc_ac_cookie_len = 0;
- sc->sc_session = 0;
-}
-
-#endif /* PPPOE_SUPPORT */
-
projects / reactos.git / blobdiff