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lwip/netif/ppp/ppp_oe.c@0:d7bd7384a37c, 2016-12-07 (annotated)

Committer:
grzemich
Date:
Wed Dec 07 23:47:50 2016 +0000
Revision:
0:d7bd7384a37c
dgd

Who changed what in which revision?

UserRevisionLine numberNew contents of line
grzemich 0:d7bd7384a37c 1 /*****************************************************************************
grzemich 0:d7bd7384a37c 2 * ppp_oe.c - PPP Over Ethernet implementation for lwIP.
grzemich 0:d7bd7384a37c 3 *
grzemich 0:d7bd7384a37c 4 * Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc.
grzemich 0:d7bd7384a37c 5 *
grzemich 0:d7bd7384a37c 6 * The authors hereby grant permission to use, copy, modify, distribute,
grzemich 0:d7bd7384a37c 7 * and license this software and its documentation for any purpose, provided
grzemich 0:d7bd7384a37c 8 * that existing copyright notices are retained in all copies and that this
grzemich 0:d7bd7384a37c 9 * notice and the following disclaimer are included verbatim in any
grzemich 0:d7bd7384a37c 10 * distributions. No written agreement, license, or royalty fee is required
grzemich 0:d7bd7384a37c 11 * for any of the authorized uses.
grzemich 0:d7bd7384a37c 12 *
grzemich 0:d7bd7384a37c 13 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
grzemich 0:d7bd7384a37c 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
grzemich 0:d7bd7384a37c 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
grzemich 0:d7bd7384a37c 16 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
grzemich 0:d7bd7384a37c 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
grzemich 0:d7bd7384a37c 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
grzemich 0:d7bd7384a37c 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
grzemich 0:d7bd7384a37c 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
grzemich 0:d7bd7384a37c 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
grzemich 0:d7bd7384a37c 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
grzemich 0:d7bd7384a37c 23 *
grzemich 0:d7bd7384a37c 24 ******************************************************************************
grzemich 0:d7bd7384a37c 25 * REVISION HISTORY
grzemich 0:d7bd7384a37c 26 *
grzemich 0:d7bd7384a37c 27 * 06-01-01 Marc Boucher <marc@mbsi.ca>
grzemich 0:d7bd7384a37c 28 * Ported to lwIP.
grzemich 0:d7bd7384a37c 29 *****************************************************************************/
grzemich 0:d7bd7384a37c 30
grzemich 0:d7bd7384a37c 31
grzemich 0:d7bd7384a37c 32
grzemich 0:d7bd7384a37c 33 /* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */
grzemich 0:d7bd7384a37c 34
grzemich 0:d7bd7384a37c 35 /*-
grzemich 0:d7bd7384a37c 36 * Copyright (c) 2002 The NetBSD Foundation, Inc.
grzemich 0:d7bd7384a37c 37 * All rights reserved.
grzemich 0:d7bd7384a37c 38 *
grzemich 0:d7bd7384a37c 39 * This code is derived from software contributed to The NetBSD Foundation
grzemich 0:d7bd7384a37c 40 * by Martin Husemann <martin@NetBSD.org>.
grzemich 0:d7bd7384a37c 41 *
grzemich 0:d7bd7384a37c 42 * Redistribution and use in source and binary forms, with or without
grzemich 0:d7bd7384a37c 43 * modification, are permitted provided that the following conditions
grzemich 0:d7bd7384a37c 44 * are met:
grzemich 0:d7bd7384a37c 45 * 1. Redistributions of source code must retain the above copyright
grzemich 0:d7bd7384a37c 46 * notice, this list of conditions and the following disclaimer.
grzemich 0:d7bd7384a37c 47 * 2. Redistributions in binary form must reproduce the above copyright
grzemich 0:d7bd7384a37c 48 * notice, this list of conditions and the following disclaimer in the
grzemich 0:d7bd7384a37c 49 * documentation and/or other materials provided with the distribution.
grzemich 0:d7bd7384a37c 50 * 3. All advertising materials mentioning features or use of this software
grzemich 0:d7bd7384a37c 51 * must display the following acknowledgement:
grzemich 0:d7bd7384a37c 52 * This product includes software developed by the NetBSD
grzemich 0:d7bd7384a37c 53 * Foundation, Inc. and its contributors.
grzemich 0:d7bd7384a37c 54 * 4. Neither the name of The NetBSD Foundation nor the names of its
grzemich 0:d7bd7384a37c 55 * contributors may be used to endorse or promote products derived
grzemich 0:d7bd7384a37c 56 * from this software without specific prior written permission.
grzemich 0:d7bd7384a37c 57 *
grzemich 0:d7bd7384a37c 58 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
grzemich 0:d7bd7384a37c 59 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
grzemich 0:d7bd7384a37c 60 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
grzemich 0:d7bd7384a37c 61 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
grzemich 0:d7bd7384a37c 62 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
grzemich 0:d7bd7384a37c 63 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
grzemich 0:d7bd7384a37c 64 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
grzemich 0:d7bd7384a37c 65 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
grzemich 0:d7bd7384a37c 66 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
grzemich 0:d7bd7384a37c 67 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
grzemich 0:d7bd7384a37c 68 * POSSIBILITY OF SUCH DAMAGE.
grzemich 0:d7bd7384a37c 69 */
grzemich 0:d7bd7384a37c 70
grzemich 0:d7bd7384a37c 71 #include "lwip/opt.h"
grzemich 0:d7bd7384a37c 72
grzemich 0:d7bd7384a37c 73 #if PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */
grzemich 0:d7bd7384a37c 74
grzemich 0:d7bd7384a37c 75 #include "netif/ppp_oe.h"
grzemich 0:d7bd7384a37c 76
grzemich 0:d7bd7384a37c 77 #include "ppp.h"
grzemich 0:d7bd7384a37c 78 #include "pppdebug.h"
grzemich 0:d7bd7384a37c 79
grzemich 0:d7bd7384a37c 80 #include "lwip/timers.h"
grzemich 0:d7bd7384a37c 81 #include "lwip/memp.h"
grzemich 0:d7bd7384a37c 82
grzemich 0:d7bd7384a37c 83 #include <string.h>
grzemich 0:d7bd7384a37c 84 #include <stdio.h>
grzemich 0:d7bd7384a37c 85
grzemich 0:d7bd7384a37c 86
grzemich 0:d7bd7384a37c 87 /* Add a 16 bit unsigned value to a buffer pointed to by PTR */
grzemich 0:d7bd7384a37c 88 #define PPPOE_ADD_16(PTR, VAL) \
grzemich 0:d7bd7384a37c 89 *(PTR)++ = (u8_t)((VAL) / 256); \
grzemich 0:d7bd7384a37c 90 *(PTR)++ = (u8_t)((VAL) % 256)
grzemich 0:d7bd7384a37c 91
grzemich 0:d7bd7384a37c 92 /* Add a complete PPPoE header to the buffer pointed to by PTR */
grzemich 0:d7bd7384a37c 93 #define PPPOE_ADD_HEADER(PTR, CODE, SESS, LEN) \
grzemich 0:d7bd7384a37c 94 *(PTR)++ = PPPOE_VERTYPE; \
grzemich 0:d7bd7384a37c 95 *(PTR)++ = (CODE); \
grzemich 0:d7bd7384a37c 96 PPPOE_ADD_16(PTR, SESS); \
grzemich 0:d7bd7384a37c 97 PPPOE_ADD_16(PTR, LEN)
grzemich 0:d7bd7384a37c 98
grzemich 0:d7bd7384a37c 99 #define PPPOE_DISC_TIMEOUT (5*1000) /* base for quick timeout calculation */
grzemich 0:d7bd7384a37c 100 #define PPPOE_SLOW_RETRY (60*1000) /* persistent retry interval */
grzemich 0:d7bd7384a37c 101 #define PPPOE_DISC_MAXPADI 4 /* retry PADI four times (quickly) */
grzemich 0:d7bd7384a37c 102 #define PPPOE_DISC_MAXPADR 2 /* retry PADR twice */
grzemich 0:d7bd7384a37c 103
grzemich 0:d7bd7384a37c 104 #ifdef PPPOE_SERVER
grzemich 0:d7bd7384a37c 105 #error "PPPOE_SERVER is not yet supported under lwIP!"
grzemich 0:d7bd7384a37c 106 /* from if_spppsubr.c */
grzemich 0:d7bd7384a37c 107 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
grzemich 0:d7bd7384a37c 108 #endif
grzemich 0:d7bd7384a37c 109
grzemich 0:d7bd7384a37c 110 #ifndef PPPOE_ERRORSTRING_LEN
grzemich 0:d7bd7384a37c 111 #define PPPOE_ERRORSTRING_LEN 64
grzemich 0:d7bd7384a37c 112 #endif
grzemich 0:d7bd7384a37c 113 static char pppoe_error_tmp[PPPOE_ERRORSTRING_LEN];
grzemich 0:d7bd7384a37c 114
grzemich 0:d7bd7384a37c 115
grzemich 0:d7bd7384a37c 116 /* input routines */
grzemich 0:d7bd7384a37c 117 static void pppoe_dispatch_disc_pkt(struct netif *, struct pbuf *);
grzemich 0:d7bd7384a37c 118
grzemich 0:d7bd7384a37c 119 /* management routines */
grzemich 0:d7bd7384a37c 120 static int pppoe_do_disconnect(struct pppoe_softc *);
grzemich 0:d7bd7384a37c 121 static void pppoe_abort_connect(struct pppoe_softc *);
grzemich 0:d7bd7384a37c 122 static void pppoe_clear_softc(struct pppoe_softc *, const char *);
grzemich 0:d7bd7384a37c 123
grzemich 0:d7bd7384a37c 124 /* internal timeout handling */
grzemich 0:d7bd7384a37c 125 static void pppoe_timeout(void *);
grzemich 0:d7bd7384a37c 126
grzemich 0:d7bd7384a37c 127 /* sending actual protocol controll packets */
grzemich 0:d7bd7384a37c 128 static err_t pppoe_send_padi(struct pppoe_softc *);
grzemich 0:d7bd7384a37c 129 static err_t pppoe_send_padr(struct pppoe_softc *);
grzemich 0:d7bd7384a37c 130 #ifdef PPPOE_SERVER
grzemich 0:d7bd7384a37c 131 static err_t pppoe_send_pado(struct pppoe_softc *);
grzemich 0:d7bd7384a37c 132 static err_t pppoe_send_pads(struct pppoe_softc *);
grzemich 0:d7bd7384a37c 133 #endif
grzemich 0:d7bd7384a37c 134 static err_t pppoe_send_padt(struct netif *, u_int, const u8_t *);
grzemich 0:d7bd7384a37c 135
grzemich 0:d7bd7384a37c 136 /* internal helper functions */
grzemich 0:d7bd7384a37c 137 static struct pppoe_softc * pppoe_find_softc_by_session(u_int, struct netif *);
grzemich 0:d7bd7384a37c 138 static struct pppoe_softc * pppoe_find_softc_by_hunique(u8_t *, size_t, struct netif *);
grzemich 0:d7bd7384a37c 139
grzemich 0:d7bd7384a37c 140 /** linked list of created pppoe interfaces */
grzemich 0:d7bd7384a37c 141 static struct pppoe_softc *pppoe_softc_list;
grzemich 0:d7bd7384a37c 142
grzemich 0:d7bd7384a37c 143 err_t
grzemich 0:d7bd7384a37c 144 pppoe_create(struct netif *ethif, int pd, void (*linkStatusCB)(int pd, int up), struct pppoe_softc **scptr)
grzemich 0:d7bd7384a37c 145 {
grzemich 0:d7bd7384a37c 146 struct pppoe_softc *sc;
grzemich 0:d7bd7384a37c 147
grzemich 0:d7bd7384a37c 148 sc = (struct pppoe_softc *)memp_malloc(MEMP_PPPOE_IF);
grzemich 0:d7bd7384a37c 149 if (sc == NULL) {
grzemich 0:d7bd7384a37c 150 *scptr = NULL;
grzemich 0:d7bd7384a37c 151 return ERR_MEM;
grzemich 0:d7bd7384a37c 152 }
grzemich 0:d7bd7384a37c 153 memset(sc, 0, sizeof(struct pppoe_softc));
grzemich 0:d7bd7384a37c 154
grzemich 0:d7bd7384a37c 155 /* changed to real address later */
grzemich 0:d7bd7384a37c 156 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
grzemich 0:d7bd7384a37c 157
grzemich 0:d7bd7384a37c 158 sc->sc_pd = pd;
grzemich 0:d7bd7384a37c 159 sc->sc_linkStatusCB = linkStatusCB;
grzemich 0:d7bd7384a37c 160 sc->sc_ethif = ethif;
grzemich 0:d7bd7384a37c 161
grzemich 0:d7bd7384a37c 162 /* put the new interface at the head of the list */
grzemich 0:d7bd7384a37c 163 sc->next = pppoe_softc_list;
grzemich 0:d7bd7384a37c 164 pppoe_softc_list = sc;
grzemich 0:d7bd7384a37c 165
grzemich 0:d7bd7384a37c 166 *scptr = sc;
grzemich 0:d7bd7384a37c 167
grzemich 0:d7bd7384a37c 168 return ERR_OK;
grzemich 0:d7bd7384a37c 169 }
grzemich 0:d7bd7384a37c 170
grzemich 0:d7bd7384a37c 171 err_t
grzemich 0:d7bd7384a37c 172 pppoe_destroy(struct netif *ifp)
grzemich 0:d7bd7384a37c 173 {
grzemich 0:d7bd7384a37c 174 struct pppoe_softc *sc, *prev = NULL;
grzemich 0:d7bd7384a37c 175
grzemich 0:d7bd7384a37c 176 for (sc = pppoe_softc_list; sc != NULL; prev = sc, sc = sc->next) {
grzemich 0:d7bd7384a37c 177 if (sc->sc_ethif == ifp) {
grzemich 0:d7bd7384a37c 178 break;
grzemich 0:d7bd7384a37c 179 }
grzemich 0:d7bd7384a37c 180 }
grzemich 0:d7bd7384a37c 181
grzemich 0:d7bd7384a37c 182 if(!(sc && (sc->sc_ethif == ifp))) {
grzemich 0:d7bd7384a37c 183 return ERR_IF;
grzemich 0:d7bd7384a37c 184 }
grzemich 0:d7bd7384a37c 185
grzemich 0:d7bd7384a37c 186 sys_untimeout(pppoe_timeout, sc);
grzemich 0:d7bd7384a37c 187 if (prev == NULL) {
grzemich 0:d7bd7384a37c 188 /* remove sc from the head of the list */
grzemich 0:d7bd7384a37c 189 pppoe_softc_list = sc->next;
grzemich 0:d7bd7384a37c 190 } else {
grzemich 0:d7bd7384a37c 191 /* remove sc from the list */
grzemich 0:d7bd7384a37c 192 prev->next = sc->next;
grzemich 0:d7bd7384a37c 193 }
grzemich 0:d7bd7384a37c 194
grzemich 0:d7bd7384a37c 195 #ifdef PPPOE_TODO
grzemich 0:d7bd7384a37c 196 if (sc->sc_concentrator_name) {
grzemich 0:d7bd7384a37c 197 mem_free(sc->sc_concentrator_name);
grzemich 0:d7bd7384a37c 198 }
grzemich 0:d7bd7384a37c 199 if (sc->sc_service_name) {
grzemich 0:d7bd7384a37c 200 mem_free(sc->sc_service_name);
grzemich 0:d7bd7384a37c 201 }
grzemich 0:d7bd7384a37c 202 #endif /* PPPOE_TODO */
grzemich 0:d7bd7384a37c 203 memp_free(MEMP_PPPOE_IF, sc);
grzemich 0:d7bd7384a37c 204
grzemich 0:d7bd7384a37c 205 return ERR_OK;
grzemich 0:d7bd7384a37c 206 }
grzemich 0:d7bd7384a37c 207
grzemich 0:d7bd7384a37c 208 /*
grzemich 0:d7bd7384a37c 209 * Find the interface handling the specified session.
grzemich 0:d7bd7384a37c 210 * Note: O(number of sessions open), this is a client-side only, mean
grzemich 0:d7bd7384a37c 211 * and lean implementation, so number of open sessions typically should
grzemich 0:d7bd7384a37c 212 * be 1.
grzemich 0:d7bd7384a37c 213 */
grzemich 0:d7bd7384a37c 214 static struct pppoe_softc *
grzemich 0:d7bd7384a37c 215 pppoe_find_softc_by_session(u_int session, struct netif *rcvif)
grzemich 0:d7bd7384a37c 216 {
grzemich 0:d7bd7384a37c 217 struct pppoe_softc *sc;
grzemich 0:d7bd7384a37c 218
grzemich 0:d7bd7384a37c 219 if (session == 0) {
grzemich 0:d7bd7384a37c 220 return NULL;
grzemich 0:d7bd7384a37c 221 }
grzemich 0:d7bd7384a37c 222
grzemich 0:d7bd7384a37c 223 for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
grzemich 0:d7bd7384a37c 224 if (sc->sc_state == PPPOE_STATE_SESSION
grzemich 0:d7bd7384a37c 225 && sc->sc_session == session) {
grzemich 0:d7bd7384a37c 226 if (sc->sc_ethif == rcvif) {
grzemich 0:d7bd7384a37c 227 return sc;
grzemich 0:d7bd7384a37c 228 } else {
grzemich 0:d7bd7384a37c 229 return NULL;
grzemich 0:d7bd7384a37c 230 }
grzemich 0:d7bd7384a37c 231 }
grzemich 0:d7bd7384a37c 232 }
grzemich 0:d7bd7384a37c 233 return NULL;
grzemich 0:d7bd7384a37c 234 }
grzemich 0:d7bd7384a37c 235
grzemich 0:d7bd7384a37c 236 /* Check host unique token passed and return appropriate softc pointer,
grzemich 0:d7bd7384a37c 237 * or NULL if token is bogus. */
grzemich 0:d7bd7384a37c 238 static struct pppoe_softc *
grzemich 0:d7bd7384a37c 239 pppoe_find_softc_by_hunique(u8_t *token, size_t len, struct netif *rcvif)
grzemich 0:d7bd7384a37c 240 {
grzemich 0:d7bd7384a37c 241 struct pppoe_softc *sc, *t;
grzemich 0:d7bd7384a37c 242
grzemich 0:d7bd7384a37c 243 if (pppoe_softc_list == NULL) {
grzemich 0:d7bd7384a37c 244 return NULL;
grzemich 0:d7bd7384a37c 245 }
grzemich 0:d7bd7384a37c 246
grzemich 0:d7bd7384a37c 247 if (len != sizeof sc) {
grzemich 0:d7bd7384a37c 248 return NULL;
grzemich 0:d7bd7384a37c 249 }
grzemich 0:d7bd7384a37c 250 MEMCPY(&t, token, len);
grzemich 0:d7bd7384a37c 251
grzemich 0:d7bd7384a37c 252 for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
grzemich 0:d7bd7384a37c 253 if (sc == t) {
grzemich 0:d7bd7384a37c 254 break;
grzemich 0:d7bd7384a37c 255 }
grzemich 0:d7bd7384a37c 256 }
grzemich 0:d7bd7384a37c 257
grzemich 0:d7bd7384a37c 258 if (sc == NULL) {
grzemich 0:d7bd7384a37c 259 PPPDEBUG(LOG_DEBUG, ("pppoe: alien host unique tag, no session found\n"));
grzemich 0:d7bd7384a37c 260 return NULL;
grzemich 0:d7bd7384a37c 261 }
grzemich 0:d7bd7384a37c 262
grzemich 0:d7bd7384a37c 263 /* should be safe to access *sc now */
grzemich 0:d7bd7384a37c 264 if (sc->sc_state < PPPOE_STATE_PADI_SENT || sc->sc_state >= PPPOE_STATE_SESSION) {
grzemich 0:d7bd7384a37c 265 printf("%c%c%"U16_F": host unique tag found, but it belongs to a connection in state %d\n",
grzemich 0:d7bd7384a37c 266 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_state);
grzemich 0:d7bd7384a37c 267 return NULL;
grzemich 0:d7bd7384a37c 268 }
grzemich 0:d7bd7384a37c 269 if (sc->sc_ethif != rcvif) {
grzemich 0:d7bd7384a37c 270 printf("%c%c%"U16_F": wrong interface, not accepting host unique\n",
grzemich 0:d7bd7384a37c 271 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
grzemich 0:d7bd7384a37c 272 return NULL;
grzemich 0:d7bd7384a37c 273 }
grzemich 0:d7bd7384a37c 274 return sc;
grzemich 0:d7bd7384a37c 275 }
grzemich 0:d7bd7384a37c 276
grzemich 0:d7bd7384a37c 277 static void
grzemich 0:d7bd7384a37c 278 pppoe_linkstatus_up(struct pppoe_softc *sc)
grzemich 0:d7bd7384a37c 279 {
grzemich 0:d7bd7384a37c 280 sc->sc_linkStatusCB(sc->sc_pd, 1);
grzemich 0:d7bd7384a37c 281 }
grzemich 0:d7bd7384a37c 282
grzemich 0:d7bd7384a37c 283 /* analyze and handle a single received packet while not in session state */
grzemich 0:d7bd7384a37c 284 static void
grzemich 0:d7bd7384a37c 285 pppoe_dispatch_disc_pkt(struct netif *netif, struct pbuf *pb)
grzemich 0:d7bd7384a37c 286 {
grzemich 0:d7bd7384a37c 287 u16_t tag, len;
grzemich 0:d7bd7384a37c 288 u16_t session, plen;
grzemich 0:d7bd7384a37c 289 struct pppoe_softc *sc;
grzemich 0:d7bd7384a37c 290 const char *err_msg;
grzemich 0:d7bd7384a37c 291 char devname[6];
grzemich 0:d7bd7384a37c 292 u8_t *ac_cookie;
grzemich 0:d7bd7384a37c 293 u16_t ac_cookie_len;
grzemich 0:d7bd7384a37c 294 #ifdef PPPOE_SERVER
grzemich 0:d7bd7384a37c 295 u8_t *hunique;
grzemich 0:d7bd7384a37c 296 size_t hunique_len;
grzemich 0:d7bd7384a37c 297 #endif
grzemich 0:d7bd7384a37c 298 struct pppoehdr *ph;
grzemich 0:d7bd7384a37c 299 struct pppoetag pt;
grzemich 0:d7bd7384a37c 300 int off, err, errortag;
grzemich 0:d7bd7384a37c 301 struct eth_hdr *ethhdr;
grzemich 0:d7bd7384a37c 302
grzemich 0:d7bd7384a37c 303 pb = pppSingleBuf(pb);
grzemich 0:d7bd7384a37c 304
grzemich 0:d7bd7384a37c 305 strcpy(devname, "pppoe"); /* as long as we don't know which instance */
grzemich 0:d7bd7384a37c 306 err_msg = NULL;
grzemich 0:d7bd7384a37c 307 errortag = 0;
grzemich 0:d7bd7384a37c 308 if (pb->len < sizeof(*ethhdr)) {
grzemich 0:d7bd7384a37c 309 goto done;
grzemich 0:d7bd7384a37c 310 }
grzemich 0:d7bd7384a37c 311 ethhdr = (struct eth_hdr *)pb->payload;
grzemich 0:d7bd7384a37c 312 off = sizeof(*ethhdr);
grzemich 0:d7bd7384a37c 313
grzemich 0:d7bd7384a37c 314 ac_cookie = NULL;
grzemich 0:d7bd7384a37c 315 ac_cookie_len = 0;
grzemich 0:d7bd7384a37c 316 #ifdef PPPOE_SERVER
grzemich 0:d7bd7384a37c 317 hunique = NULL;
grzemich 0:d7bd7384a37c 318 hunique_len = 0;
grzemich 0:d7bd7384a37c 319 #endif
grzemich 0:d7bd7384a37c 320 session = 0;
grzemich 0:d7bd7384a37c 321 if (pb->len - off < PPPOE_HEADERLEN) {
grzemich 0:d7bd7384a37c 322 printf("pppoe: packet too short: %d\n", pb->len);
grzemich 0:d7bd7384a37c 323 goto done;
grzemich 0:d7bd7384a37c 324 }
grzemich 0:d7bd7384a37c 325
grzemich 0:d7bd7384a37c 326 ph = (struct pppoehdr *) (ethhdr + 1);
grzemich 0:d7bd7384a37c 327 if (ph->vertype != PPPOE_VERTYPE) {
grzemich 0:d7bd7384a37c 328 printf("pppoe: unknown version/type packet: 0x%x\n", ph->vertype);
grzemich 0:d7bd7384a37c 329 goto done;
grzemich 0:d7bd7384a37c 330 }
grzemich 0:d7bd7384a37c 331 session = ntohs(ph->session);
grzemich 0:d7bd7384a37c 332 plen = ntohs(ph->plen);
grzemich 0:d7bd7384a37c 333 off += sizeof(*ph);
grzemich 0:d7bd7384a37c 334
grzemich 0:d7bd7384a37c 335 if (plen + off > pb->len) {
grzemich 0:d7bd7384a37c 336 printf("pppoe: packet content does not fit: data available = %d, packet size = %u\n",
grzemich 0:d7bd7384a37c 337 pb->len - off, plen);
grzemich 0:d7bd7384a37c 338 goto done;
grzemich 0:d7bd7384a37c 339 }
grzemich 0:d7bd7384a37c 340 if(pb->tot_len == pb->len) {
grzemich 0:d7bd7384a37c 341 pb->tot_len = pb->len = (u16_t)off + plen; /* ignore trailing garbage */
grzemich 0:d7bd7384a37c 342 }
grzemich 0:d7bd7384a37c 343 tag = 0;
grzemich 0:d7bd7384a37c 344 len = 0;
grzemich 0:d7bd7384a37c 345 sc = NULL;
grzemich 0:d7bd7384a37c 346 while (off + sizeof(pt) <= pb->len) {
grzemich 0:d7bd7384a37c 347 MEMCPY(&pt, (u8_t*)pb->payload + off, sizeof(pt));
grzemich 0:d7bd7384a37c 348 tag = ntohs(pt.tag);
grzemich 0:d7bd7384a37c 349 len = ntohs(pt.len);
grzemich 0:d7bd7384a37c 350 if (off + sizeof(pt) + len > pb->len) {
grzemich 0:d7bd7384a37c 351 printf("pppoe: tag 0x%x len 0x%x is too long\n", tag, len);
grzemich 0:d7bd7384a37c 352 goto done;
grzemich 0:d7bd7384a37c 353 }
grzemich 0:d7bd7384a37c 354 switch (tag) {
grzemich 0:d7bd7384a37c 355 case PPPOE_TAG_EOL:
grzemich 0:d7bd7384a37c 356 goto breakbreak;
grzemich 0:d7bd7384a37c 357 case PPPOE_TAG_SNAME:
grzemich 0:d7bd7384a37c 358 break; /* ignored */
grzemich 0:d7bd7384a37c 359 case PPPOE_TAG_ACNAME:
grzemich 0:d7bd7384a37c 360 break; /* ignored */
grzemich 0:d7bd7384a37c 361 case PPPOE_TAG_HUNIQUE:
grzemich 0:d7bd7384a37c 362 if (sc != NULL) {
grzemich 0:d7bd7384a37c 363 break;
grzemich 0:d7bd7384a37c 364 }
grzemich 0:d7bd7384a37c 365 #ifdef PPPOE_SERVER
grzemich 0:d7bd7384a37c 366 hunique = (u8_t*)pb->payload + off + sizeof(pt);
grzemich 0:d7bd7384a37c 367 hunique_len = len;
grzemich 0:d7bd7384a37c 368 #endif
grzemich 0:d7bd7384a37c 369 sc = pppoe_find_softc_by_hunique((u8_t*)pb->payload + off + sizeof(pt), len, netif);
grzemich 0:d7bd7384a37c 370 if (sc != NULL) {
grzemich 0:d7bd7384a37c 371 snprintf(devname, sizeof(devname), "%c%c%"U16_F, sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
grzemich 0:d7bd7384a37c 372 }
grzemich 0:d7bd7384a37c 373 break;
grzemich 0:d7bd7384a37c 374 case PPPOE_TAG_ACCOOKIE:
grzemich 0:d7bd7384a37c 375 if (ac_cookie == NULL) {
grzemich 0:d7bd7384a37c 376 ac_cookie = (u8_t*)pb->payload + off + sizeof(pt);
grzemich 0:d7bd7384a37c 377 ac_cookie_len = len;
grzemich 0:d7bd7384a37c 378 }
grzemich 0:d7bd7384a37c 379 break;
grzemich 0:d7bd7384a37c 380 case PPPOE_TAG_SNAME_ERR:
grzemich 0:d7bd7384a37c 381 err_msg = "SERVICE NAME ERROR";
grzemich 0:d7bd7384a37c 382 errortag = 1;
grzemich 0:d7bd7384a37c 383 break;
grzemich 0:d7bd7384a37c 384 case PPPOE_TAG_ACSYS_ERR:
grzemich 0:d7bd7384a37c 385 err_msg = "AC SYSTEM ERROR";
grzemich 0:d7bd7384a37c 386 errortag = 1;
grzemich 0:d7bd7384a37c 387 break;
grzemich 0:d7bd7384a37c 388 case PPPOE_TAG_GENERIC_ERR:
grzemich 0:d7bd7384a37c 389 err_msg = "GENERIC ERROR";
grzemich 0:d7bd7384a37c 390 errortag = 1;
grzemich 0:d7bd7384a37c 391 break;
grzemich 0:d7bd7384a37c 392 }
grzemich 0:d7bd7384a37c 393 if (err_msg) {
grzemich 0:d7bd7384a37c 394 if (errortag && len) {
grzemich 0:d7bd7384a37c 395 u16_t error_len = LWIP_MIN(len, sizeof(pppoe_error_tmp)-1);
grzemich 0:d7bd7384a37c 396 strncpy(pppoe_error_tmp, (char*)pb->payload + off + sizeof(pt), error_len);
grzemich 0:d7bd7384a37c 397 pppoe_error_tmp[error_len-1] = '\0';
grzemich 0:d7bd7384a37c 398 printf("%s: %s: %s\n", devname, err_msg, pppoe_error_tmp);
grzemich 0:d7bd7384a37c 399 } else {
grzemich 0:d7bd7384a37c 400 printf("%s: %s\n", devname, err_msg);
grzemich 0:d7bd7384a37c 401 }
grzemich 0:d7bd7384a37c 402 if (errortag) {
grzemich 0:d7bd7384a37c 403 goto done;
grzemich 0:d7bd7384a37c 404 }
grzemich 0:d7bd7384a37c 405 }
grzemich 0:d7bd7384a37c 406 off += sizeof(pt) + len;
grzemich 0:d7bd7384a37c 407 }
grzemich 0:d7bd7384a37c 408
grzemich 0:d7bd7384a37c 409 breakbreak:;
grzemich 0:d7bd7384a37c 410 switch (ph->code) {
grzemich 0:d7bd7384a37c 411 case PPPOE_CODE_PADI:
grzemich 0:d7bd7384a37c 412 #ifdef PPPOE_SERVER
grzemich 0:d7bd7384a37c 413 /*
grzemich 0:d7bd7384a37c 414 * got service name, concentrator name, and/or host unique.
grzemich 0:d7bd7384a37c 415 * ignore if we have no interfaces with IFF_PASSIVE|IFF_UP.
grzemich 0:d7bd7384a37c 416 */
grzemich 0:d7bd7384a37c 417 if (LIST_EMPTY(&pppoe_softc_list)) {
grzemich 0:d7bd7384a37c 418 goto done;
grzemich 0:d7bd7384a37c 419 }
grzemich 0:d7bd7384a37c 420 LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
grzemich 0:d7bd7384a37c 421 if (!(sc->sc_sppp.pp_if.if_flags & IFF_UP)) {
grzemich 0:d7bd7384a37c 422 continue;
grzemich 0:d7bd7384a37c 423 }
grzemich 0:d7bd7384a37c 424 if (!(sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
grzemich 0:d7bd7384a37c 425 continue;
grzemich 0:d7bd7384a37c 426 }
grzemich 0:d7bd7384a37c 427 if (sc->sc_state == PPPOE_STATE_INITIAL) {
grzemich 0:d7bd7384a37c 428 break;
grzemich 0:d7bd7384a37c 429 }
grzemich 0:d7bd7384a37c 430 }
grzemich 0:d7bd7384a37c 431 if (sc == NULL) {
grzemich 0:d7bd7384a37c 432 /* printf("pppoe: free passive interface is not found\n"); */
grzemich 0:d7bd7384a37c 433 goto done;
grzemich 0:d7bd7384a37c 434 }
grzemich 0:d7bd7384a37c 435 if (hunique) {
grzemich 0:d7bd7384a37c 436 if (sc->sc_hunique) {
grzemich 0:d7bd7384a37c 437 mem_free(sc->sc_hunique);
grzemich 0:d7bd7384a37c 438 }
grzemich 0:d7bd7384a37c 439 sc->sc_hunique = mem_malloc(hunique_len);
grzemich 0:d7bd7384a37c 440 if (sc->sc_hunique == NULL) {
grzemich 0:d7bd7384a37c 441 goto done;
grzemich 0:d7bd7384a37c 442 }
grzemich 0:d7bd7384a37c 443 sc->sc_hunique_len = hunique_len;
grzemich 0:d7bd7384a37c 444 MEMCPY(sc->sc_hunique, hunique, hunique_len);
grzemich 0:d7bd7384a37c 445 }
grzemich 0:d7bd7384a37c 446 MEMCPY(&sc->sc_dest, eh->ether_shost, sizeof sc->sc_dest);
grzemich 0:d7bd7384a37c 447 sc->sc_state = PPPOE_STATE_PADO_SENT;
grzemich 0:d7bd7384a37c 448 pppoe_send_pado(sc);
grzemich 0:d7bd7384a37c 449 break;
grzemich 0:d7bd7384a37c 450 #endif /* PPPOE_SERVER */
grzemich 0:d7bd7384a37c 451 case PPPOE_CODE_PADR:
grzemich 0:d7bd7384a37c 452 #ifdef PPPOE_SERVER
grzemich 0:d7bd7384a37c 453 /*
grzemich 0:d7bd7384a37c 454 * get sc from ac_cookie if IFF_PASSIVE
grzemich 0:d7bd7384a37c 455 */
grzemich 0:d7bd7384a37c 456 if (ac_cookie == NULL) {
grzemich 0:d7bd7384a37c 457 /* be quiet if there is not a single pppoe instance */
grzemich 0:d7bd7384a37c 458 printf("pppoe: received PADR but not includes ac_cookie\n");
grzemich 0:d7bd7384a37c 459 goto done;
grzemich 0:d7bd7384a37c 460 }
grzemich 0:d7bd7384a37c 461 sc = pppoe_find_softc_by_hunique(ac_cookie, ac_cookie_len, netif);
grzemich 0:d7bd7384a37c 462 if (sc == NULL) {
grzemich 0:d7bd7384a37c 463 /* be quiet if there is not a single pppoe instance */
grzemich 0:d7bd7384a37c 464 if (!LIST_EMPTY(&pppoe_softc_list)) {
grzemich 0:d7bd7384a37c 465 printf("pppoe: received PADR but could not find request for it\n");
grzemich 0:d7bd7384a37c 466 }
grzemich 0:d7bd7384a37c 467 goto done;
grzemich 0:d7bd7384a37c 468 }
grzemich 0:d7bd7384a37c 469 if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
grzemich 0:d7bd7384a37c 470 printf("%c%c%"U16_F": received unexpected PADR\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
grzemich 0:d7bd7384a37c 471 goto done;
grzemich 0:d7bd7384a37c 472 }
grzemich 0:d7bd7384a37c 473 if (hunique) {
grzemich 0:d7bd7384a37c 474 if (sc->sc_hunique) {
grzemich 0:d7bd7384a37c 475 mem_free(sc->sc_hunique);
grzemich 0:d7bd7384a37c 476 }
grzemich 0:d7bd7384a37c 477 sc->sc_hunique = mem_malloc(hunique_len);
grzemich 0:d7bd7384a37c 478 if (sc->sc_hunique == NULL) {
grzemich 0:d7bd7384a37c 479 goto done;
grzemich 0:d7bd7384a37c 480 }
grzemich 0:d7bd7384a37c 481 sc->sc_hunique_len = hunique_len;
grzemich 0:d7bd7384a37c 482 MEMCPY(sc->sc_hunique, hunique, hunique_len);
grzemich 0:d7bd7384a37c 483 }
grzemich 0:d7bd7384a37c 484 pppoe_send_pads(sc);
grzemich 0:d7bd7384a37c 485 sc->sc_state = PPPOE_STATE_SESSION;
grzemich 0:d7bd7384a37c 486 pppoe_linkstatus_up(sc); /* notify upper layers */
grzemich 0:d7bd7384a37c 487 break;
grzemich 0:d7bd7384a37c 488 #else
grzemich 0:d7bd7384a37c 489 /* ignore, we are no access concentrator */
grzemich 0:d7bd7384a37c 490 goto done;
grzemich 0:d7bd7384a37c 491 #endif /* PPPOE_SERVER */
grzemich 0:d7bd7384a37c 492 case PPPOE_CODE_PADO:
grzemich 0:d7bd7384a37c 493 if (sc == NULL) {
grzemich 0:d7bd7384a37c 494 /* be quiet if there is not a single pppoe instance */
grzemich 0:d7bd7384a37c 495 if (pppoe_softc_list != NULL) {
grzemich 0:d7bd7384a37c 496 printf("pppoe: received PADO but could not find request for it\n");
grzemich 0:d7bd7384a37c 497 }
grzemich 0:d7bd7384a37c 498 goto done;
grzemich 0:d7bd7384a37c 499 }
grzemich 0:d7bd7384a37c 500 if (sc->sc_state != PPPOE_STATE_PADI_SENT) {
grzemich 0:d7bd7384a37c 501 printf("%c%c%"U16_F": received unexpected PADO\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
grzemich 0:d7bd7384a37c 502 goto done;
grzemich 0:d7bd7384a37c 503 }
grzemich 0:d7bd7384a37c 504 if (ac_cookie) {
grzemich 0:d7bd7384a37c 505 sc->sc_ac_cookie_len = ac_cookie_len;
grzemich 0:d7bd7384a37c 506 MEMCPY(sc->sc_ac_cookie, ac_cookie, ac_cookie_len);
grzemich 0:d7bd7384a37c 507 }
grzemich 0:d7bd7384a37c 508 MEMCPY(&sc->sc_dest, ethhdr->src.addr, sizeof(sc->sc_dest.addr));
grzemich 0:d7bd7384a37c 509 sys_untimeout(pppoe_timeout, sc);
grzemich 0:d7bd7384a37c 510 sc->sc_padr_retried = 0;
grzemich 0:d7bd7384a37c 511 sc->sc_state = PPPOE_STATE_PADR_SENT;
grzemich 0:d7bd7384a37c 512 if ((err = pppoe_send_padr(sc)) != 0) {
grzemich 0:d7bd7384a37c 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));
grzemich 0:d7bd7384a37c 514 }
grzemich 0:d7bd7384a37c 515 sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
grzemich 0:d7bd7384a37c 516 break;
grzemich 0:d7bd7384a37c 517 case PPPOE_CODE_PADS:
grzemich 0:d7bd7384a37c 518 if (sc == NULL) {
grzemich 0:d7bd7384a37c 519 goto done;
grzemich 0:d7bd7384a37c 520 }
grzemich 0:d7bd7384a37c 521 sc->sc_session = session;
grzemich 0:d7bd7384a37c 522 sys_untimeout(pppoe_timeout, sc);
grzemich 0:d7bd7384a37c 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));
grzemich 0:d7bd7384a37c 524 sc->sc_state = PPPOE_STATE_SESSION;
grzemich 0:d7bd7384a37c 525 pppoe_linkstatus_up(sc); /* notify upper layers */
grzemich 0:d7bd7384a37c 526 break;
grzemich 0:d7bd7384a37c 527 case PPPOE_CODE_PADT:
grzemich 0:d7bd7384a37c 528 if (sc == NULL) {
grzemich 0:d7bd7384a37c 529 goto done;
grzemich 0:d7bd7384a37c 530 }
grzemich 0:d7bd7384a37c 531 pppoe_clear_softc(sc, "received PADT");
grzemich 0:d7bd7384a37c 532 break;
grzemich 0:d7bd7384a37c 533 default:
grzemich 0:d7bd7384a37c 534 if(sc) {
grzemich 0:d7bd7384a37c 535 printf("%c%c%"U16_F": unknown code (0x%"X16_F") session = 0x%"X16_F"\n",
grzemich 0:d7bd7384a37c 536 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
grzemich 0:d7bd7384a37c 537 (u16_t)ph->code, session);
grzemich 0:d7bd7384a37c 538 } else {
grzemich 0:d7bd7384a37c 539 printf("pppoe: unknown code (0x%"X16_F") session = 0x%"X16_F"\n", (u16_t)ph->code, session);
grzemich 0:d7bd7384a37c 540 }
grzemich 0:d7bd7384a37c 541 break;
grzemich 0:d7bd7384a37c 542 }
grzemich 0:d7bd7384a37c 543
grzemich 0:d7bd7384a37c 544 done:
grzemich 0:d7bd7384a37c 545 pbuf_free(pb);
grzemich 0:d7bd7384a37c 546 return;
grzemich 0:d7bd7384a37c 547 }
grzemich 0:d7bd7384a37c 548
grzemich 0:d7bd7384a37c 549 void
grzemich 0:d7bd7384a37c 550 pppoe_disc_input(struct netif *netif, struct pbuf *p)
grzemich 0:d7bd7384a37c 551 {
grzemich 0:d7bd7384a37c 552 /* avoid error messages if there is not a single pppoe instance */
grzemich 0:d7bd7384a37c 553 if (pppoe_softc_list != NULL) {
grzemich 0:d7bd7384a37c 554 pppoe_dispatch_disc_pkt(netif, p);
grzemich 0:d7bd7384a37c 555 } else {
grzemich 0:d7bd7384a37c 556 pbuf_free(p);
grzemich 0:d7bd7384a37c 557 }
grzemich 0:d7bd7384a37c 558 }
grzemich 0:d7bd7384a37c 559
grzemich 0:d7bd7384a37c 560 void
grzemich 0:d7bd7384a37c 561 pppoe_data_input(struct netif *netif, struct pbuf *pb)
grzemich 0:d7bd7384a37c 562 {
grzemich 0:d7bd7384a37c 563 u16_t session, plen;
grzemich 0:d7bd7384a37c 564 struct pppoe_softc *sc;
grzemich 0:d7bd7384a37c 565 struct pppoehdr *ph;
grzemich 0:d7bd7384a37c 566 #ifdef PPPOE_TERM_UNKNOWN_SESSIONS
grzemich 0:d7bd7384a37c 567 u8_t shost[ETHER_ADDR_LEN];
grzemich 0:d7bd7384a37c 568 #endif
grzemich 0:d7bd7384a37c 569
grzemich 0:d7bd7384a37c 570 #ifdef PPPOE_TERM_UNKNOWN_SESSIONS
grzemich 0:d7bd7384a37c 571 MEMCPY(shost, ((struct eth_hdr *)pb->payload)->src.addr, sizeof(shost));
grzemich 0:d7bd7384a37c 572 #endif
grzemich 0:d7bd7384a37c 573 if (pbuf_header(pb, -(int)sizeof(struct eth_hdr)) != 0) {
grzemich 0:d7bd7384a37c 574 /* bail out */
grzemich 0:d7bd7384a37c 575 PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header failed\n"));
grzemich 0:d7bd7384a37c 576 LINK_STATS_INC(link.lenerr);
grzemich 0:d7bd7384a37c 577 goto drop;
grzemich 0:d7bd7384a37c 578 }
grzemich 0:d7bd7384a37c 579
grzemich 0:d7bd7384a37c 580 pb = pppSingleBuf (pb);
grzemich 0:d7bd7384a37c 581
grzemich 0:d7bd7384a37c 582 if (pb->len <= PPPOE_HEADERLEN) {
grzemich 0:d7bd7384a37c 583 printf("pppoe (data): dropping too short packet: %d bytes\n", pb->len);
grzemich 0:d7bd7384a37c 584 goto drop;
grzemich 0:d7bd7384a37c 585 }
grzemich 0:d7bd7384a37c 586
grzemich 0:d7bd7384a37c 587 if (pb->len < sizeof(*ph)) {
grzemich 0:d7bd7384a37c 588 printf("pppoe_data_input: could not get PPPoE header\n");
grzemich 0:d7bd7384a37c 589 goto drop;
grzemich 0:d7bd7384a37c 590 }
grzemich 0:d7bd7384a37c 591 ph = (struct pppoehdr *)pb->payload;
grzemich 0:d7bd7384a37c 592
grzemich 0:d7bd7384a37c 593 if (ph->vertype != PPPOE_VERTYPE) {
grzemich 0:d7bd7384a37c 594 printf("pppoe (data): unknown version/type packet: 0x%x\n", ph->vertype);
grzemich 0:d7bd7384a37c 595 goto drop;
grzemich 0:d7bd7384a37c 596 }
grzemich 0:d7bd7384a37c 597 if (ph->code != 0) {
grzemich 0:d7bd7384a37c 598 goto drop;
grzemich 0:d7bd7384a37c 599 }
grzemich 0:d7bd7384a37c 600
grzemich 0:d7bd7384a37c 601 session = ntohs(ph->session);
grzemich 0:d7bd7384a37c 602 sc = pppoe_find_softc_by_session(session, netif);
grzemich 0:d7bd7384a37c 603 if (sc == NULL) {
grzemich 0:d7bd7384a37c 604 #ifdef PPPOE_TERM_UNKNOWN_SESSIONS
grzemich 0:d7bd7384a37c 605 printf("pppoe: input for unknown session 0x%x, sending PADT\n", session);
grzemich 0:d7bd7384a37c 606 pppoe_send_padt(netif, session, shost);
grzemich 0:d7bd7384a37c 607 #endif
grzemich 0:d7bd7384a37c 608 goto drop;
grzemich 0:d7bd7384a37c 609 }
grzemich 0:d7bd7384a37c 610
grzemich 0:d7bd7384a37c 611 plen = ntohs(ph->plen);
grzemich 0:d7bd7384a37c 612
grzemich 0:d7bd7384a37c 613 if (pbuf_header(pb, -(int)(PPPOE_HEADERLEN)) != 0) {
grzemich 0:d7bd7384a37c 614 /* bail out */
grzemich 0:d7bd7384a37c 615 PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header PPPOE_HEADERLEN failed\n"));
grzemich 0:d7bd7384a37c 616 LINK_STATS_INC(link.lenerr);
grzemich 0:d7bd7384a37c 617 goto drop;
grzemich 0:d7bd7384a37c 618 }
grzemich 0:d7bd7384a37c 619
grzemich 0:d7bd7384a37c 620 PPPDEBUG(LOG_DEBUG, ("pppoe_data_input: %c%c%"U16_F": pkthdr.len=%d, pppoe.len=%d\n",
grzemich 0:d7bd7384a37c 621 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
grzemich 0:d7bd7384a37c 622 pb->len, plen));
grzemich 0:d7bd7384a37c 623
grzemich 0:d7bd7384a37c 624 if (pb->len < plen) {
grzemich 0:d7bd7384a37c 625 goto drop;
grzemich 0:d7bd7384a37c 626 }
grzemich 0:d7bd7384a37c 627
grzemich 0:d7bd7384a37c 628 pppInProcOverEthernet(sc->sc_pd, pb);
grzemich 0:d7bd7384a37c 629
grzemich 0:d7bd7384a37c 630 return;
grzemich 0:d7bd7384a37c 631
grzemich 0:d7bd7384a37c 632 drop:
grzemich 0:d7bd7384a37c 633 pbuf_free(pb);
grzemich 0:d7bd7384a37c 634 }
grzemich 0:d7bd7384a37c 635
grzemich 0:d7bd7384a37c 636 static err_t
grzemich 0:d7bd7384a37c 637 pppoe_output(struct pppoe_softc *sc, struct pbuf *pb)
grzemich 0:d7bd7384a37c 638 {
grzemich 0:d7bd7384a37c 639 struct eth_hdr *ethhdr;
grzemich 0:d7bd7384a37c 640 u16_t etype;
grzemich 0:d7bd7384a37c 641 err_t res;
grzemich 0:d7bd7384a37c 642
grzemich 0:d7bd7384a37c 643 if (!sc->sc_ethif) {
grzemich 0:d7bd7384a37c 644 pbuf_free(pb);
grzemich 0:d7bd7384a37c 645 return ERR_IF;
grzemich 0:d7bd7384a37c 646 }
grzemich 0:d7bd7384a37c 647
grzemich 0:d7bd7384a37c 648 ethhdr = (struct eth_hdr *)pb->payload;
grzemich 0:d7bd7384a37c 649 etype = sc->sc_state == PPPOE_STATE_SESSION ? ETHTYPE_PPPOE : ETHTYPE_PPPOEDISC;
grzemich 0:d7bd7384a37c 650 ethhdr->type = htons(etype);
grzemich 0:d7bd7384a37c 651 MEMCPY(ethhdr->dest.addr, sc->sc_dest.addr, sizeof(ethhdr->dest.addr));
grzemich 0:d7bd7384a37c 652 MEMCPY(ethhdr->src.addr, ((struct eth_addr *)sc->sc_ethif->hwaddr)->addr, sizeof(ethhdr->src.addr));
grzemich 0:d7bd7384a37c 653
grzemich 0:d7bd7384a37c 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",
grzemich 0:d7bd7384a37c 655 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, etype,
grzemich 0:d7bd7384a37c 656 sc->sc_state, sc->sc_session,
grzemich 0:d7bd7384a37c 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],
grzemich 0:d7bd7384a37c 658 pb->tot_len));
grzemich 0:d7bd7384a37c 659
grzemich 0:d7bd7384a37c 660 res = sc->sc_ethif->linkoutput(sc->sc_ethif, pb);
grzemich 0:d7bd7384a37c 661
grzemich 0:d7bd7384a37c 662 pbuf_free(pb);
grzemich 0:d7bd7384a37c 663
grzemich 0:d7bd7384a37c 664 return res;
grzemich 0:d7bd7384a37c 665 }
grzemich 0:d7bd7384a37c 666
grzemich 0:d7bd7384a37c 667 static err_t
grzemich 0:d7bd7384a37c 668 pppoe_send_padi(struct pppoe_softc *sc)
grzemich 0:d7bd7384a37c 669 {
grzemich 0:d7bd7384a37c 670 struct pbuf *pb;
grzemich 0:d7bd7384a37c 671 u8_t *p;
grzemich 0:d7bd7384a37c 672 int len;
grzemich 0:d7bd7384a37c 673 #ifdef PPPOE_TODO
grzemich 0:d7bd7384a37c 674 int l1 = 0, l2 = 0; /* XXX: gcc */
grzemich 0:d7bd7384a37c 675 #endif /* PPPOE_TODO */
grzemich 0:d7bd7384a37c 676
grzemich 0:d7bd7384a37c 677 if (sc->sc_state >PPPOE_STATE_PADI_SENT) {
grzemich 0:d7bd7384a37c 678 PPPDEBUG(LOG_ERR, ("ERROR: pppoe_send_padi in state %d", sc->sc_state));
grzemich 0:d7bd7384a37c 679 }
grzemich 0:d7bd7384a37c 680
grzemich 0:d7bd7384a37c 681 /* calculate length of frame (excluding ethernet header + pppoe header) */
grzemich 0:d7bd7384a37c 682 len = 2 + 2 + 2 + 2 + sizeof sc; /* service name tag is required, host unique is send too */
grzemich 0:d7bd7384a37c 683 #ifdef PPPOE_TODO
grzemich 0:d7bd7384a37c 684 if (sc->sc_service_name != NULL) {
grzemich 0:d7bd7384a37c 685 l1 = (int)strlen(sc->sc_service_name);
grzemich 0:d7bd7384a37c 686 len += l1;
grzemich 0:d7bd7384a37c 687 }
grzemich 0:d7bd7384a37c 688 if (sc->sc_concentrator_name != NULL) {
grzemich 0:d7bd7384a37c 689 l2 = (int)strlen(sc->sc_concentrator_name);
grzemich 0:d7bd7384a37c 690 len += 2 + 2 + l2;
grzemich 0:d7bd7384a37c 691 }
grzemich 0:d7bd7384a37c 692 #endif /* PPPOE_TODO */
grzemich 0:d7bd7384a37c 693 LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
grzemich 0:d7bd7384a37c 694 sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
grzemich 0:d7bd7384a37c 695
grzemich 0:d7bd7384a37c 696 /* allocate a buffer */
grzemich 0:d7bd7384a37c 697 pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
grzemich 0:d7bd7384a37c 698 if (!pb) {
grzemich 0:d7bd7384a37c 699 return ERR_MEM;
grzemich 0:d7bd7384a37c 700 }
grzemich 0:d7bd7384a37c 701 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
grzemich 0:d7bd7384a37c 702
grzemich 0:d7bd7384a37c 703 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
grzemich 0:d7bd7384a37c 704 /* fill in pkt */
grzemich 0:d7bd7384a37c 705 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADI, 0, (u16_t)len);
grzemich 0:d7bd7384a37c 706 PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
grzemich 0:d7bd7384a37c 707 #ifdef PPPOE_TODO
grzemich 0:d7bd7384a37c 708 if (sc->sc_service_name != NULL) {
grzemich 0:d7bd7384a37c 709 PPPOE_ADD_16(p, l1);
grzemich 0:d7bd7384a37c 710 MEMCPY(p, sc->sc_service_name, l1);
grzemich 0:d7bd7384a37c 711 p += l1;
grzemich 0:d7bd7384a37c 712 } else
grzemich 0:d7bd7384a37c 713 #endif /* PPPOE_TODO */
grzemich 0:d7bd7384a37c 714 {
grzemich 0:d7bd7384a37c 715 PPPOE_ADD_16(p, 0);
grzemich 0:d7bd7384a37c 716 }
grzemich 0:d7bd7384a37c 717 #ifdef PPPOE_TODO
grzemich 0:d7bd7384a37c 718 if (sc->sc_concentrator_name != NULL) {
grzemich 0:d7bd7384a37c 719 PPPOE_ADD_16(p, PPPOE_TAG_ACNAME);
grzemich 0:d7bd7384a37c 720 PPPOE_ADD_16(p, l2);
grzemich 0:d7bd7384a37c 721 MEMCPY(p, sc->sc_concentrator_name, l2);
grzemich 0:d7bd7384a37c 722 p += l2;
grzemich 0:d7bd7384a37c 723 }
grzemich 0:d7bd7384a37c 724 #endif /* PPPOE_TODO */
grzemich 0:d7bd7384a37c 725 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
grzemich 0:d7bd7384a37c 726 PPPOE_ADD_16(p, sizeof(sc));
grzemich 0:d7bd7384a37c 727 MEMCPY(p, &sc, sizeof sc);
grzemich 0:d7bd7384a37c 728
grzemich 0:d7bd7384a37c 729 /* send pkt */
grzemich 0:d7bd7384a37c 730 return pppoe_output(sc, pb);
grzemich 0:d7bd7384a37c 731 }
grzemich 0:d7bd7384a37c 732
grzemich 0:d7bd7384a37c 733 static void
grzemich 0:d7bd7384a37c 734 pppoe_timeout(void *arg)
grzemich 0:d7bd7384a37c 735 {
grzemich 0:d7bd7384a37c 736 int retry_wait, err;
grzemich 0:d7bd7384a37c 737 struct pppoe_softc *sc = (struct pppoe_softc*)arg;
grzemich 0:d7bd7384a37c 738
grzemich 0:d7bd7384a37c 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));
grzemich 0:d7bd7384a37c 740
grzemich 0:d7bd7384a37c 741 switch (sc->sc_state) {
grzemich 0:d7bd7384a37c 742 case PPPOE_STATE_PADI_SENT:
grzemich 0:d7bd7384a37c 743 /*
grzemich 0:d7bd7384a37c 744 * We have two basic ways of retrying:
grzemich 0:d7bd7384a37c 745 * - Quick retry mode: try a few times in short sequence
grzemich 0:d7bd7384a37c 746 * - Slow retry mode: we already had a connection successfully
grzemich 0:d7bd7384a37c 747 * established and will try infinitely (without user
grzemich 0:d7bd7384a37c 748 * intervention)
grzemich 0:d7bd7384a37c 749 * We only enter slow retry mode if IFF_LINK1 (aka autodial)
grzemich 0:d7bd7384a37c 750 * is not set.
grzemich 0:d7bd7384a37c 751 */
grzemich 0:d7bd7384a37c 752
grzemich 0:d7bd7384a37c 753 /* initialize for quick retry mode */
grzemich 0:d7bd7384a37c 754 retry_wait = PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried);
grzemich 0:d7bd7384a37c 755
grzemich 0:d7bd7384a37c 756 sc->sc_padi_retried++;
grzemich 0:d7bd7384a37c 757 if (sc->sc_padi_retried >= PPPOE_DISC_MAXPADI) {
grzemich 0:d7bd7384a37c 758 #if 0
grzemich 0:d7bd7384a37c 759 if ((sc->sc_sppp.pp_if.if_flags & IFF_LINK1) == 0) {
grzemich 0:d7bd7384a37c 760 /* slow retry mode */
grzemich 0:d7bd7384a37c 761 retry_wait = PPPOE_SLOW_RETRY;
grzemich 0:d7bd7384a37c 762 } else
grzemich 0:d7bd7384a37c 763 #endif
grzemich 0:d7bd7384a37c 764 {
grzemich 0:d7bd7384a37c 765 pppoe_abort_connect(sc);
grzemich 0:d7bd7384a37c 766 return;
grzemich 0:d7bd7384a37c 767 }
grzemich 0:d7bd7384a37c 768 }
grzemich 0:d7bd7384a37c 769 if ((err = pppoe_send_padi(sc)) != 0) {
grzemich 0:d7bd7384a37c 770 sc->sc_padi_retried--;
grzemich 0:d7bd7384a37c 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));
grzemich 0:d7bd7384a37c 772 }
grzemich 0:d7bd7384a37c 773 sys_timeout(retry_wait, pppoe_timeout, sc);
grzemich 0:d7bd7384a37c 774 break;
grzemich 0:d7bd7384a37c 775
grzemich 0:d7bd7384a37c 776 case PPPOE_STATE_PADR_SENT:
grzemich 0:d7bd7384a37c 777 sc->sc_padr_retried++;
grzemich 0:d7bd7384a37c 778 if (sc->sc_padr_retried >= PPPOE_DISC_MAXPADR) {
grzemich 0:d7bd7384a37c 779 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
grzemich 0:d7bd7384a37c 780 sc->sc_state = PPPOE_STATE_PADI_SENT;
grzemich 0:d7bd7384a37c 781 sc->sc_padr_retried = 0;
grzemich 0:d7bd7384a37c 782 if ((err = pppoe_send_padi(sc)) != 0) {
grzemich 0:d7bd7384a37c 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));
grzemich 0:d7bd7384a37c 784 }
grzemich 0:d7bd7384a37c 785 sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried), pppoe_timeout, sc);
grzemich 0:d7bd7384a37c 786 return;
grzemich 0:d7bd7384a37c 787 }
grzemich 0:d7bd7384a37c 788 if ((err = pppoe_send_padr(sc)) != 0) {
grzemich 0:d7bd7384a37c 789 sc->sc_padr_retried--;
grzemich 0:d7bd7384a37c 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));
grzemich 0:d7bd7384a37c 791 }
grzemich 0:d7bd7384a37c 792 sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
grzemich 0:d7bd7384a37c 793 break;
grzemich 0:d7bd7384a37c 794 case PPPOE_STATE_CLOSING:
grzemich 0:d7bd7384a37c 795 pppoe_do_disconnect(sc);
grzemich 0:d7bd7384a37c 796 break;
grzemich 0:d7bd7384a37c 797 default:
grzemich 0:d7bd7384a37c 798 return; /* all done, work in peace */
grzemich 0:d7bd7384a37c 799 }
grzemich 0:d7bd7384a37c 800 }
grzemich 0:d7bd7384a37c 801
grzemich 0:d7bd7384a37c 802 /* Start a connection (i.e. initiate discovery phase) */
grzemich 0:d7bd7384a37c 803 int
grzemich 0:d7bd7384a37c 804 pppoe_connect(struct pppoe_softc *sc)
grzemich 0:d7bd7384a37c 805 {
grzemich 0:d7bd7384a37c 806 int err;
grzemich 0:d7bd7384a37c 807
grzemich 0:d7bd7384a37c 808 if (sc->sc_state != PPPOE_STATE_INITIAL) {
grzemich 0:d7bd7384a37c 809 return EBUSY;
grzemich 0:d7bd7384a37c 810 }
grzemich 0:d7bd7384a37c 811
grzemich 0:d7bd7384a37c 812 #ifdef PPPOE_SERVER
grzemich 0:d7bd7384a37c 813 /* wait PADI if IFF_PASSIVE */
grzemich 0:d7bd7384a37c 814 if ((sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
grzemich 0:d7bd7384a37c 815 return 0;
grzemich 0:d7bd7384a37c 816 }
grzemich 0:d7bd7384a37c 817 #endif
grzemich 0:d7bd7384a37c 818 /* save state, in case we fail to send PADI */
grzemich 0:d7bd7384a37c 819 sc->sc_state = PPPOE_STATE_PADI_SENT;
grzemich 0:d7bd7384a37c 820 sc->sc_padr_retried = 0;
grzemich 0:d7bd7384a37c 821 err = pppoe_send_padi(sc);
grzemich 0:d7bd7384a37c 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));
grzemich 0:d7bd7384a37c 823 sys_timeout(PPPOE_DISC_TIMEOUT, pppoe_timeout, sc);
grzemich 0:d7bd7384a37c 824 return err;
grzemich 0:d7bd7384a37c 825 }
grzemich 0:d7bd7384a37c 826
grzemich 0:d7bd7384a37c 827 /* disconnect */
grzemich 0:d7bd7384a37c 828 void
grzemich 0:d7bd7384a37c 829 pppoe_disconnect(struct pppoe_softc *sc)
grzemich 0:d7bd7384a37c 830 {
grzemich 0:d7bd7384a37c 831 if (sc->sc_state < PPPOE_STATE_SESSION) {
grzemich 0:d7bd7384a37c 832 return;
grzemich 0:d7bd7384a37c 833 }
grzemich 0:d7bd7384a37c 834 /*
grzemich 0:d7bd7384a37c 835 * Do not call pppoe_disconnect here, the upper layer state
grzemich 0:d7bd7384a37c 836 * machine gets confused by this. We must return from this
grzemich 0:d7bd7384a37c 837 * function and defer disconnecting to the timeout handler.
grzemich 0:d7bd7384a37c 838 */
grzemich 0:d7bd7384a37c 839 sc->sc_state = PPPOE_STATE_CLOSING;
grzemich 0:d7bd7384a37c 840 sys_timeout(20, pppoe_timeout, sc);
grzemich 0:d7bd7384a37c 841 }
grzemich 0:d7bd7384a37c 842
grzemich 0:d7bd7384a37c 843 static int
grzemich 0:d7bd7384a37c 844 pppoe_do_disconnect(struct pppoe_softc *sc)
grzemich 0:d7bd7384a37c 845 {
grzemich 0:d7bd7384a37c 846 int err;
grzemich 0:d7bd7384a37c 847
grzemich 0:d7bd7384a37c 848 if (sc->sc_state < PPPOE_STATE_SESSION) {
grzemich 0:d7bd7384a37c 849 err = EBUSY;
grzemich 0:d7bd7384a37c 850 } else {
grzemich 0:d7bd7384a37c 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));
grzemich 0:d7bd7384a37c 852 err = pppoe_send_padt(sc->sc_ethif, sc->sc_session, (const u8_t *)&sc->sc_dest);
grzemich 0:d7bd7384a37c 853 }
grzemich 0:d7bd7384a37c 854
grzemich 0:d7bd7384a37c 855 /* cleanup softc */
grzemich 0:d7bd7384a37c 856 sc->sc_state = PPPOE_STATE_INITIAL;
grzemich 0:d7bd7384a37c 857 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
grzemich 0:d7bd7384a37c 858 sc->sc_ac_cookie_len = 0;
grzemich 0:d7bd7384a37c 859 #ifdef PPPOE_SERVER
grzemich 0:d7bd7384a37c 860 if (sc->sc_hunique) {
grzemich 0:d7bd7384a37c 861 mem_free(sc->sc_hunique);
grzemich 0:d7bd7384a37c 862 sc->sc_hunique = NULL;
grzemich 0:d7bd7384a37c 863 }
grzemich 0:d7bd7384a37c 864 sc->sc_hunique_len = 0;
grzemich 0:d7bd7384a37c 865 #endif
grzemich 0:d7bd7384a37c 866 sc->sc_session = 0;
grzemich 0:d7bd7384a37c 867
grzemich 0:d7bd7384a37c 868 sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
grzemich 0:d7bd7384a37c 869
grzemich 0:d7bd7384a37c 870 return err;
grzemich 0:d7bd7384a37c 871 }
grzemich 0:d7bd7384a37c 872
grzemich 0:d7bd7384a37c 873 /* Connection attempt aborted */
grzemich 0:d7bd7384a37c 874 static void
grzemich 0:d7bd7384a37c 875 pppoe_abort_connect(struct pppoe_softc *sc)
grzemich 0:d7bd7384a37c 876 {
grzemich 0:d7bd7384a37c 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);
grzemich 0:d7bd7384a37c 878 sc->sc_state = PPPOE_STATE_CLOSING;
grzemich 0:d7bd7384a37c 879
grzemich 0:d7bd7384a37c 880 sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
grzemich 0:d7bd7384a37c 881
grzemich 0:d7bd7384a37c 882 /* clear connection state */
grzemich 0:d7bd7384a37c 883 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
grzemich 0:d7bd7384a37c 884 sc->sc_state = PPPOE_STATE_INITIAL;
grzemich 0:d7bd7384a37c 885 }
grzemich 0:d7bd7384a37c 886
grzemich 0:d7bd7384a37c 887 /* Send a PADR packet */
grzemich 0:d7bd7384a37c 888 static err_t
grzemich 0:d7bd7384a37c 889 pppoe_send_padr(struct pppoe_softc *sc)
grzemich 0:d7bd7384a37c 890 {
grzemich 0:d7bd7384a37c 891 struct pbuf *pb;
grzemich 0:d7bd7384a37c 892 u8_t *p;
grzemich 0:d7bd7384a37c 893 size_t len;
grzemich 0:d7bd7384a37c 894 #ifdef PPPOE_TODO
grzemich 0:d7bd7384a37c 895 size_t l1 = 0; /* XXX: gcc */
grzemich 0:d7bd7384a37c 896 #endif /* PPPOE_TODO */
grzemich 0:d7bd7384a37c 897
grzemich 0:d7bd7384a37c 898 if (sc->sc_state != PPPOE_STATE_PADR_SENT) {
grzemich 0:d7bd7384a37c 899 return ERR_CONN;
grzemich 0:d7bd7384a37c 900 }
grzemich 0:d7bd7384a37c 901
grzemich 0:d7bd7384a37c 902 len = 2 + 2 + 2 + 2 + sizeof(sc); /* service name, host unique */
grzemich 0:d7bd7384a37c 903 #ifdef PPPOE_TODO
grzemich 0:d7bd7384a37c 904 if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
grzemich 0:d7bd7384a37c 905 l1 = strlen(sc->sc_service_name);
grzemich 0:d7bd7384a37c 906 len += l1;
grzemich 0:d7bd7384a37c 907 }
grzemich 0:d7bd7384a37c 908 #endif /* PPPOE_TODO */
grzemich 0:d7bd7384a37c 909 if (sc->sc_ac_cookie_len > 0) {
grzemich 0:d7bd7384a37c 910 len += 2 + 2 + sc->sc_ac_cookie_len; /* AC cookie */
grzemich 0:d7bd7384a37c 911 }
grzemich 0:d7bd7384a37c 912 LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
grzemich 0:d7bd7384a37c 913 sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
grzemich 0:d7bd7384a37c 914 pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
grzemich 0:d7bd7384a37c 915 if (!pb) {
grzemich 0:d7bd7384a37c 916 return ERR_MEM;
grzemich 0:d7bd7384a37c 917 }
grzemich 0:d7bd7384a37c 918 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
grzemich 0:d7bd7384a37c 919 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
grzemich 0:d7bd7384a37c 920 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADR, 0, len);
grzemich 0:d7bd7384a37c 921 PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
grzemich 0:d7bd7384a37c 922 #ifdef PPPOE_TODO
grzemich 0:d7bd7384a37c 923 if (sc->sc_service_name != NULL) {
grzemich 0:d7bd7384a37c 924 PPPOE_ADD_16(p, l1);
grzemich 0:d7bd7384a37c 925 MEMCPY(p, sc->sc_service_name, l1);
grzemich 0:d7bd7384a37c 926 p += l1;
grzemich 0:d7bd7384a37c 927 } else
grzemich 0:d7bd7384a37c 928 #endif /* PPPOE_TODO */
grzemich 0:d7bd7384a37c 929 {
grzemich 0:d7bd7384a37c 930 PPPOE_ADD_16(p, 0);
grzemich 0:d7bd7384a37c 931 }
grzemich 0:d7bd7384a37c 932 if (sc->sc_ac_cookie_len > 0) {
grzemich 0:d7bd7384a37c 933 PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
grzemich 0:d7bd7384a37c 934 PPPOE_ADD_16(p, sc->sc_ac_cookie_len);
grzemich 0:d7bd7384a37c 935 MEMCPY(p, sc->sc_ac_cookie, sc->sc_ac_cookie_len);
grzemich 0:d7bd7384a37c 936 p += sc->sc_ac_cookie_len;
grzemich 0:d7bd7384a37c 937 }
grzemich 0:d7bd7384a37c 938 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
grzemich 0:d7bd7384a37c 939 PPPOE_ADD_16(p, sizeof(sc));
grzemich 0:d7bd7384a37c 940 MEMCPY(p, &sc, sizeof sc);
grzemich 0:d7bd7384a37c 941
grzemich 0:d7bd7384a37c 942 return pppoe_output(sc, pb);
grzemich 0:d7bd7384a37c 943 }
grzemich 0:d7bd7384a37c 944
grzemich 0:d7bd7384a37c 945 /* send a PADT packet */
grzemich 0:d7bd7384a37c 946 static err_t
grzemich 0:d7bd7384a37c 947 pppoe_send_padt(struct netif *outgoing_if, u_int session, const u8_t *dest)
grzemich 0:d7bd7384a37c 948 {
grzemich 0:d7bd7384a37c 949 struct pbuf *pb;
grzemich 0:d7bd7384a37c 950 struct eth_hdr *ethhdr;
grzemich 0:d7bd7384a37c 951 err_t res;
grzemich 0:d7bd7384a37c 952 u8_t *p;
grzemich 0:d7bd7384a37c 953
grzemich 0:d7bd7384a37c 954 pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN, PBUF_RAM);
grzemich 0:d7bd7384a37c 955 if (!pb) {
grzemich 0:d7bd7384a37c 956 return ERR_MEM;
grzemich 0:d7bd7384a37c 957 }
grzemich 0:d7bd7384a37c 958 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
grzemich 0:d7bd7384a37c 959
grzemich 0:d7bd7384a37c 960 ethhdr = (struct eth_hdr *)pb->payload;
grzemich 0:d7bd7384a37c 961 ethhdr->type = PP_HTONS(ETHTYPE_PPPOEDISC);
grzemich 0:d7bd7384a37c 962 MEMCPY(ethhdr->dest.addr, dest, sizeof(ethhdr->dest.addr));
grzemich 0:d7bd7384a37c 963 MEMCPY(ethhdr->src.addr, ((struct eth_addr *)outgoing_if->hwaddr)->addr, sizeof(ethhdr->src.addr));
grzemich 0:d7bd7384a37c 964
grzemich 0:d7bd7384a37c 965 p = (u8_t*)(ethhdr + 1);
grzemich 0:d7bd7384a37c 966 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADT, session, 0);
grzemich 0:d7bd7384a37c 967
grzemich 0:d7bd7384a37c 968 res = outgoing_if->linkoutput(outgoing_if, pb);
grzemich 0:d7bd7384a37c 969
grzemich 0:d7bd7384a37c 970 pbuf_free(pb);
grzemich 0:d7bd7384a37c 971
grzemich 0:d7bd7384a37c 972 return res;
grzemich 0:d7bd7384a37c 973 }
grzemich 0:d7bd7384a37c 974
grzemich 0:d7bd7384a37c 975 #ifdef PPPOE_SERVER
grzemich 0:d7bd7384a37c 976 static err_t
grzemich 0:d7bd7384a37c 977 pppoe_send_pado(struct pppoe_softc *sc)
grzemich 0:d7bd7384a37c 978 {
grzemich 0:d7bd7384a37c 979 struct pbuf *pb;
grzemich 0:d7bd7384a37c 980 u8_t *p;
grzemich 0:d7bd7384a37c 981 size_t len;
grzemich 0:d7bd7384a37c 982
grzemich 0:d7bd7384a37c 983 if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
grzemich 0:d7bd7384a37c 984 return ERR_CONN;
grzemich 0:d7bd7384a37c 985 }
grzemich 0:d7bd7384a37c 986
grzemich 0:d7bd7384a37c 987 /* calc length */
grzemich 0:d7bd7384a37c 988 len = 0;
grzemich 0:d7bd7384a37c 989 /* include ac_cookie */
grzemich 0:d7bd7384a37c 990 len += 2 + 2 + sizeof(sc);
grzemich 0:d7bd7384a37c 991 /* include hunique */
grzemich 0:d7bd7384a37c 992 len += 2 + 2 + sc->sc_hunique_len;
grzemich 0:d7bd7384a37c 993 pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
grzemich 0:d7bd7384a37c 994 if (!pb) {
grzemich 0:d7bd7384a37c 995 return ERR_MEM;
grzemich 0:d7bd7384a37c 996 }
grzemich 0:d7bd7384a37c 997 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
grzemich 0:d7bd7384a37c 998 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
grzemich 0:d7bd7384a37c 999 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADO, 0, len);
grzemich 0:d7bd7384a37c 1000 PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
grzemich 0:d7bd7384a37c 1001 PPPOE_ADD_16(p, sizeof(sc));
grzemich 0:d7bd7384a37c 1002 MEMCPY(p, &sc, sizeof(sc));
grzemich 0:d7bd7384a37c 1003 p += sizeof(sc);
grzemich 0:d7bd7384a37c 1004 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
grzemich 0:d7bd7384a37c 1005 PPPOE_ADD_16(p, sc->sc_hunique_len);
grzemich 0:d7bd7384a37c 1006 MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
grzemich 0:d7bd7384a37c 1007 return pppoe_output(sc, pb);
grzemich 0:d7bd7384a37c 1008 }
grzemich 0:d7bd7384a37c 1009
grzemich 0:d7bd7384a37c 1010 static err_t
grzemich 0:d7bd7384a37c 1011 pppoe_send_pads(struct pppoe_softc *sc)
grzemich 0:d7bd7384a37c 1012 {
grzemich 0:d7bd7384a37c 1013 struct pbuf *pb;
grzemich 0:d7bd7384a37c 1014 u8_t *p;
grzemich 0:d7bd7384a37c 1015 size_t len, l1 = 0; /* XXX: gcc */
grzemich 0:d7bd7384a37c 1016
grzemich 0:d7bd7384a37c 1017 if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
grzemich 0:d7bd7384a37c 1018 return ERR_CONN;
grzemich 0:d7bd7384a37c 1019 }
grzemich 0:d7bd7384a37c 1020
grzemich 0:d7bd7384a37c 1021 sc->sc_session = mono_time.tv_sec % 0xff + 1;
grzemich 0:d7bd7384a37c 1022 /* calc length */
grzemich 0:d7bd7384a37c 1023 len = 0;
grzemich 0:d7bd7384a37c 1024 /* include hunique */
grzemich 0:d7bd7384a37c 1025 len += 2 + 2 + 2 + 2 + sc->sc_hunique_len; /* service name, host unique*/
grzemich 0:d7bd7384a37c 1026 if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
grzemich 0:d7bd7384a37c 1027 l1 = strlen(sc->sc_service_name);
grzemich 0:d7bd7384a37c 1028 len += l1;
grzemich 0:d7bd7384a37c 1029 }
grzemich 0:d7bd7384a37c 1030 pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
grzemich 0:d7bd7384a37c 1031 if (!pb) {
grzemich 0:d7bd7384a37c 1032 return ERR_MEM;
grzemich 0:d7bd7384a37c 1033 }
grzemich 0:d7bd7384a37c 1034 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
grzemich 0:d7bd7384a37c 1035 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
grzemich 0:d7bd7384a37c 1036 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADS, sc->sc_session, len);
grzemich 0:d7bd7384a37c 1037 PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
grzemich 0:d7bd7384a37c 1038 if (sc->sc_service_name != NULL) {
grzemich 0:d7bd7384a37c 1039 PPPOE_ADD_16(p, l1);
grzemich 0:d7bd7384a37c 1040 MEMCPY(p, sc->sc_service_name, l1);
grzemich 0:d7bd7384a37c 1041 p += l1;
grzemich 0:d7bd7384a37c 1042 } else {
grzemich 0:d7bd7384a37c 1043 PPPOE_ADD_16(p, 0);
grzemich 0:d7bd7384a37c 1044 }
grzemich 0:d7bd7384a37c 1045 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
grzemich 0:d7bd7384a37c 1046 PPPOE_ADD_16(p, sc->sc_hunique_len);
grzemich 0:d7bd7384a37c 1047 MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
grzemich 0:d7bd7384a37c 1048 return pppoe_output(sc, pb);
grzemich 0:d7bd7384a37c 1049 }
grzemich 0:d7bd7384a37c 1050 #endif
grzemich 0:d7bd7384a37c 1051
grzemich 0:d7bd7384a37c 1052 err_t
grzemich 0:d7bd7384a37c 1053 pppoe_xmit(struct pppoe_softc *sc, struct pbuf *pb)
grzemich 0:d7bd7384a37c 1054 {
grzemich 0:d7bd7384a37c 1055 u8_t *p;
grzemich 0:d7bd7384a37c 1056 size_t len;
grzemich 0:d7bd7384a37c 1057
grzemich 0:d7bd7384a37c 1058 /* are we ready to process data yet? */
grzemich 0:d7bd7384a37c 1059 if (sc->sc_state < PPPOE_STATE_SESSION) {
grzemich 0:d7bd7384a37c 1060 /*sppp_flush(&sc->sc_sppp.pp_if);*/
grzemich 0:d7bd7384a37c 1061 pbuf_free(pb);
grzemich 0:d7bd7384a37c 1062 return ERR_CONN;
grzemich 0:d7bd7384a37c 1063 }
grzemich 0:d7bd7384a37c 1064
grzemich 0:d7bd7384a37c 1065 len = pb->tot_len;
grzemich 0:d7bd7384a37c 1066
grzemich 0:d7bd7384a37c 1067 /* make room for Ethernet header - should not fail */
grzemich 0:d7bd7384a37c 1068 if (pbuf_header(pb, sizeof(struct eth_hdr) + PPPOE_HEADERLEN) != 0) {
grzemich 0:d7bd7384a37c 1069 /* bail out */
grzemich 0:d7bd7384a37c 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));
grzemich 0:d7bd7384a37c 1071 LINK_STATS_INC(link.lenerr);
grzemich 0:d7bd7384a37c 1072 pbuf_free(pb);
grzemich 0:d7bd7384a37c 1073 return ERR_BUF;
grzemich 0:d7bd7384a37c 1074 }
grzemich 0:d7bd7384a37c 1075
grzemich 0:d7bd7384a37c 1076 p = (u8_t*)pb->payload + sizeof(struct eth_hdr);
grzemich 0:d7bd7384a37c 1077 PPPOE_ADD_HEADER(p, 0, sc->sc_session, len);
grzemich 0:d7bd7384a37c 1078
grzemich 0:d7bd7384a37c 1079 return pppoe_output(sc, pb);
grzemich 0:d7bd7384a37c 1080 }
grzemich 0:d7bd7384a37c 1081
grzemich 0:d7bd7384a37c 1082 #if 0 /*def PFIL_HOOKS*/
grzemich 0:d7bd7384a37c 1083 static int
grzemich 0:d7bd7384a37c 1084 pppoe_ifattach_hook(void *arg, struct pbuf **mp, struct netif *ifp, int dir)
grzemich 0:d7bd7384a37c 1085 {
grzemich 0:d7bd7384a37c 1086 struct pppoe_softc *sc;
grzemich 0:d7bd7384a37c 1087 int s;
grzemich 0:d7bd7384a37c 1088
grzemich 0:d7bd7384a37c 1089 if (mp != (struct pbuf **)PFIL_IFNET_DETACH) {
grzemich 0:d7bd7384a37c 1090 return 0;
grzemich 0:d7bd7384a37c 1091 }
grzemich 0:d7bd7384a37c 1092
grzemich 0:d7bd7384a37c 1093 LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
grzemich 0:d7bd7384a37c 1094 if (sc->sc_ethif != ifp) {
grzemich 0:d7bd7384a37c 1095 continue;
grzemich 0:d7bd7384a37c 1096 }
grzemich 0:d7bd7384a37c 1097 if (sc->sc_sppp.pp_if.if_flags & IFF_UP) {
grzemich 0:d7bd7384a37c 1098 sc->sc_sppp.pp_if.if_flags &= ~(IFF_UP|IFF_RUNNING);
grzemich 0:d7bd7384a37c 1099 printf("%c%c%"U16_F": ethernet interface detached, going down\n",
grzemich 0:d7bd7384a37c 1100 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
grzemich 0:d7bd7384a37c 1101 }
grzemich 0:d7bd7384a37c 1102 sc->sc_ethif = NULL;
grzemich 0:d7bd7384a37c 1103 pppoe_clear_softc(sc, "ethernet interface detached");
grzemich 0:d7bd7384a37c 1104 }
grzemich 0:d7bd7384a37c 1105
grzemich 0:d7bd7384a37c 1106 return 0;
grzemich 0:d7bd7384a37c 1107 }
grzemich 0:d7bd7384a37c 1108 #endif
grzemich 0:d7bd7384a37c 1109
grzemich 0:d7bd7384a37c 1110 static void
grzemich 0:d7bd7384a37c 1111 pppoe_clear_softc(struct pppoe_softc *sc, const char *message)
grzemich 0:d7bd7384a37c 1112 {
grzemich 0:d7bd7384a37c 1113 LWIP_UNUSED_ARG(message);
grzemich 0:d7bd7384a37c 1114
grzemich 0:d7bd7384a37c 1115 /* stop timer */
grzemich 0:d7bd7384a37c 1116 sys_untimeout(pppoe_timeout, sc);
grzemich 0:d7bd7384a37c 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));
grzemich 0:d7bd7384a37c 1118
grzemich 0:d7bd7384a37c 1119 /* fix our state */
grzemich 0:d7bd7384a37c 1120 sc->sc_state = PPPOE_STATE_INITIAL;
grzemich 0:d7bd7384a37c 1121
grzemich 0:d7bd7384a37c 1122 /* notify upper layers */
grzemich 0:d7bd7384a37c 1123 sc->sc_linkStatusCB(sc->sc_pd, 0);
grzemich 0:d7bd7384a37c 1124
grzemich 0:d7bd7384a37c 1125 /* clean up softc */
grzemich 0:d7bd7384a37c 1126 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
grzemich 0:d7bd7384a37c 1127 sc->sc_ac_cookie_len = 0;
grzemich 0:d7bd7384a37c 1128 sc->sc_session = 0;
grzemich 0:d7bd7384a37c 1129 }
grzemich 0:d7bd7384a37c 1130
grzemich 0:d7bd7384a37c 1131 #endif /* PPPOE_SUPPORT */
grzemich 0:d7bd7384a37c 1132