VZTECH / lwip_vz

wip

Dependents:   EthernetInterface_vz

Fork of lwip by VZTECH

netif/ppp/ppp_oe.c@30:cb9095482c25, 2015-04-07 (annotated)

Committer:
klauss
Date:
Tue Apr 07 14:27:01 2015 +0000
Revision:
30:cb9095482c25
Parent:
0:51ac1d130fd4 
wip

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:51ac1d130fd4 1 /*****************************************************************************
mbed_official 0:51ac1d130fd4 2 * ppp_oe.c - PPP Over Ethernet implementation for lwIP.
mbed_official 0:51ac1d130fd4 3 *
mbed_official 0:51ac1d130fd4 4 * Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc.
mbed_official 0:51ac1d130fd4 5 *
mbed_official 0:51ac1d130fd4 6 * The authors hereby grant permission to use, copy, modify, distribute,
mbed_official 0:51ac1d130fd4 7 * and license this software and its documentation for any purpose, provided
mbed_official 0:51ac1d130fd4 8 * that existing copyright notices are retained in all copies and that this
mbed_official 0:51ac1d130fd4 9 * notice and the following disclaimer are included verbatim in any
mbed_official 0:51ac1d130fd4 10 * distributions. No written agreement, license, or royalty fee is required
mbed_official 0:51ac1d130fd4 11 * for any of the authorized uses.
mbed_official 0:51ac1d130fd4 12 *
mbed_official 0:51ac1d130fd4 13 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
mbed_official 0:51ac1d130fd4 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
mbed_official 0:51ac1d130fd4 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
mbed_official 0:51ac1d130fd4 16 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
mbed_official 0:51ac1d130fd4 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
mbed_official 0:51ac1d130fd4 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
mbed_official 0:51ac1d130fd4 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
mbed_official 0:51ac1d130fd4 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
mbed_official 0:51ac1d130fd4 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
mbed_official 0:51ac1d130fd4 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 0:51ac1d130fd4 23 *
mbed_official 0:51ac1d130fd4 24 ******************************************************************************
mbed_official 0:51ac1d130fd4 25 * REVISION HISTORY
mbed_official 0:51ac1d130fd4 26 *
mbed_official 0:51ac1d130fd4 27 * 06-01-01 Marc Boucher <marc@mbsi.ca>
mbed_official 0:51ac1d130fd4 28 * Ported to lwIP.
mbed_official 0:51ac1d130fd4 29 *****************************************************************************/
mbed_official 0:51ac1d130fd4 30
mbed_official 0:51ac1d130fd4 31
mbed_official 0:51ac1d130fd4 32
mbed_official 0:51ac1d130fd4 33 /* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */
mbed_official 0:51ac1d130fd4 34
mbed_official 0:51ac1d130fd4 35 /*-
mbed_official 0:51ac1d130fd4 36 * Copyright (c) 2002 The NetBSD Foundation, Inc.
mbed_official 0:51ac1d130fd4 37 * All rights reserved.
mbed_official 0:51ac1d130fd4 38 *
mbed_official 0:51ac1d130fd4 39 * This code is derived from software contributed to The NetBSD Foundation
mbed_official 0:51ac1d130fd4 40 * by Martin Husemann <martin@NetBSD.org>.
mbed_official 0:51ac1d130fd4 41 *
mbed_official 0:51ac1d130fd4 42 * Redistribution and use in source and binary forms, with or without
mbed_official 0:51ac1d130fd4 43 * modification, are permitted provided that the following conditions
mbed_official 0:51ac1d130fd4 44 * are met:
mbed_official 0:51ac1d130fd4 45 * 1. Redistributions of source code must retain the above copyright
mbed_official 0:51ac1d130fd4 46 * notice, this list of conditions and the following disclaimer.
mbed_official 0:51ac1d130fd4 47 * 2. Redistributions in binary form must reproduce the above copyright
mbed_official 0:51ac1d130fd4 48 * notice, this list of conditions and the following disclaimer in the
mbed_official 0:51ac1d130fd4 49 * documentation and/or other materials provided with the distribution.
mbed_official 0:51ac1d130fd4 50 * 3. All advertising materials mentioning features or use of this software
mbed_official 0:51ac1d130fd4 51 * must display the following acknowledgement:
mbed_official 0:51ac1d130fd4 52 * This product includes software developed by the NetBSD
mbed_official 0:51ac1d130fd4 53 * Foundation, Inc. and its contributors.
mbed_official 0:51ac1d130fd4 54 * 4. Neither the name of The NetBSD Foundation nor the names of its
mbed_official 0:51ac1d130fd4 55 * contributors may be used to endorse or promote products derived
mbed_official 0:51ac1d130fd4 56 * from this software without specific prior written permission.
mbed_official 0:51ac1d130fd4 57 *
mbed_official 0:51ac1d130fd4 58 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
mbed_official 0:51ac1d130fd4 59 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
mbed_official 0:51ac1d130fd4 60 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
mbed_official 0:51ac1d130fd4 61 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
mbed_official 0:51ac1d130fd4 62 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
mbed_official 0:51ac1d130fd4 63 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
mbed_official 0:51ac1d130fd4 64 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mbed_official 0:51ac1d130fd4 65 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mbed_official 0:51ac1d130fd4 66 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
mbed_official 0:51ac1d130fd4 67 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mbed_official 0:51ac1d130fd4 68 * POSSIBILITY OF SUCH DAMAGE.
mbed_official 0:51ac1d130fd4 69 */
mbed_official 0:51ac1d130fd4 70
mbed_official 0:51ac1d130fd4 71 #include "lwip/opt.h"
mbed_official 0:51ac1d130fd4 72
mbed_official 0:51ac1d130fd4 73 #if PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */
mbed_official 0:51ac1d130fd4 74
mbed_official 0:51ac1d130fd4 75 #include "netif/ppp_oe.h"
mbed_official 0:51ac1d130fd4 76
mbed_official 0:51ac1d130fd4 77 #include "ppp.h"
mbed_official 0:51ac1d130fd4 78 #include "pppdebug.h"
mbed_official 0:51ac1d130fd4 79
mbed_official 0:51ac1d130fd4 80 #include "lwip/timers.h"
mbed_official 0:51ac1d130fd4 81 #include "lwip/memp.h"
mbed_official 0:51ac1d130fd4 82
mbed_official 0:51ac1d130fd4 83 #include <string.h>
mbed_official 0:51ac1d130fd4 84 #include <stdio.h>
mbed_official 0:51ac1d130fd4 85
mbed_official 0:51ac1d130fd4 86
mbed_official 0:51ac1d130fd4 87 /* Add a 16 bit unsigned value to a buffer pointed to by PTR */
mbed_official 0:51ac1d130fd4 88 #define PPPOE_ADD_16(PTR, VAL) \
mbed_official 0:51ac1d130fd4 89 *(PTR)++ = (u8_t)((VAL) / 256); \
mbed_official 0:51ac1d130fd4 90 *(PTR)++ = (u8_t)((VAL) % 256)
mbed_official 0:51ac1d130fd4 91
mbed_official 0:51ac1d130fd4 92 /* Add a complete PPPoE header to the buffer pointed to by PTR */
mbed_official 0:51ac1d130fd4 93 #define PPPOE_ADD_HEADER(PTR, CODE, SESS, LEN) \
mbed_official 0:51ac1d130fd4 94 *(PTR)++ = PPPOE_VERTYPE; \
mbed_official 0:51ac1d130fd4 95 *(PTR)++ = (CODE); \
mbed_official 0:51ac1d130fd4 96 PPPOE_ADD_16(PTR, SESS); \
mbed_official 0:51ac1d130fd4 97 PPPOE_ADD_16(PTR, LEN)
mbed_official 0:51ac1d130fd4 98
mbed_official 0:51ac1d130fd4 99 #define PPPOE_DISC_TIMEOUT (5*1000) /* base for quick timeout calculation */
mbed_official 0:51ac1d130fd4 100 #define PPPOE_SLOW_RETRY (60*1000) /* persistent retry interval */
mbed_official 0:51ac1d130fd4 101 #define PPPOE_DISC_MAXPADI 4 /* retry PADI four times (quickly) */
mbed_official 0:51ac1d130fd4 102 #define PPPOE_DISC_MAXPADR 2 /* retry PADR twice */
mbed_official 0:51ac1d130fd4 103
mbed_official 0:51ac1d130fd4 104 #ifdef PPPOE_SERVER
mbed_official 0:51ac1d130fd4 105 #error "PPPOE_SERVER is not yet supported under lwIP!"
mbed_official 0:51ac1d130fd4 106 /* from if_spppsubr.c */
mbed_official 0:51ac1d130fd4 107 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
mbed_official 0:51ac1d130fd4 108 #endif
mbed_official 0:51ac1d130fd4 109
mbed_official 0:51ac1d130fd4 110 #ifndef PPPOE_ERRORSTRING_LEN
mbed_official 0:51ac1d130fd4 111 #define PPPOE_ERRORSTRING_LEN 64
mbed_official 0:51ac1d130fd4 112 #endif
mbed_official 0:51ac1d130fd4 113 static char pppoe_error_tmp[PPPOE_ERRORSTRING_LEN];
mbed_official 0:51ac1d130fd4 114
mbed_official 0:51ac1d130fd4 115
mbed_official 0:51ac1d130fd4 116 /* input routines */
mbed_official 0:51ac1d130fd4 117 static void pppoe_dispatch_disc_pkt(struct netif *, struct pbuf *);
mbed_official 0:51ac1d130fd4 118
mbed_official 0:51ac1d130fd4 119 /* management routines */
mbed_official 0:51ac1d130fd4 120 static int pppoe_do_disconnect(struct pppoe_softc *);
mbed_official 0:51ac1d130fd4 121 static void pppoe_abort_connect(struct pppoe_softc *);
mbed_official 0:51ac1d130fd4 122 static void pppoe_clear_softc(struct pppoe_softc *, const char *);
mbed_official 0:51ac1d130fd4 123
mbed_official 0:51ac1d130fd4 124 /* internal timeout handling */
mbed_official 0:51ac1d130fd4 125 static void pppoe_timeout(void *);
mbed_official 0:51ac1d130fd4 126
mbed_official 0:51ac1d130fd4 127 /* sending actual protocol controll packets */
mbed_official 0:51ac1d130fd4 128 static err_t pppoe_send_padi(struct pppoe_softc *);
mbed_official 0:51ac1d130fd4 129 static err_t pppoe_send_padr(struct pppoe_softc *);
mbed_official 0:51ac1d130fd4 130 #ifdef PPPOE_SERVER
mbed_official 0:51ac1d130fd4 131 static err_t pppoe_send_pado(struct pppoe_softc *);
mbed_official 0:51ac1d130fd4 132 static err_t pppoe_send_pads(struct pppoe_softc *);
mbed_official 0:51ac1d130fd4 133 #endif
mbed_official 0:51ac1d130fd4 134 static err_t pppoe_send_padt(struct netif *, u_int, const u8_t *);
mbed_official 0:51ac1d130fd4 135
mbed_official 0:51ac1d130fd4 136 /* internal helper functions */
mbed_official 0:51ac1d130fd4 137 static struct pppoe_softc * pppoe_find_softc_by_session(u_int, struct netif *);
mbed_official 0:51ac1d130fd4 138 static struct pppoe_softc * pppoe_find_softc_by_hunique(u8_t *, size_t, struct netif *);
mbed_official 0:51ac1d130fd4 139
mbed_official 0:51ac1d130fd4 140 /** linked list of created pppoe interfaces */
mbed_official 0:51ac1d130fd4 141 static struct pppoe_softc *pppoe_softc_list;
mbed_official 0:51ac1d130fd4 142
mbed_official 0:51ac1d130fd4 143 err_t
mbed_official 0:51ac1d130fd4 144 pppoe_create(struct netif *ethif, int pd, void (*linkStatusCB)(int pd, int up), struct pppoe_softc **scptr)
mbed_official 0:51ac1d130fd4 145 {
mbed_official 0:51ac1d130fd4 146 struct pppoe_softc *sc;
mbed_official 0:51ac1d130fd4 147
mbed_official 0:51ac1d130fd4 148 sc = (struct pppoe_softc *)memp_malloc(MEMP_PPPOE_IF);
mbed_official 0:51ac1d130fd4 149 if (sc == NULL) {
mbed_official 0:51ac1d130fd4 150 *scptr = NULL;
mbed_official 0:51ac1d130fd4 151 return ERR_MEM;
mbed_official 0:51ac1d130fd4 152 }
mbed_official 0:51ac1d130fd4 153 memset(sc, 0, sizeof(struct pppoe_softc));
mbed_official 0:51ac1d130fd4 154
mbed_official 0:51ac1d130fd4 155 /* changed to real address later */
mbed_official 0:51ac1d130fd4 156 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
mbed_official 0:51ac1d130fd4 157
mbed_official 0:51ac1d130fd4 158 sc->sc_pd = pd;
mbed_official 0:51ac1d130fd4 159 sc->sc_linkStatusCB = linkStatusCB;
mbed_official 0:51ac1d130fd4 160 sc->sc_ethif = ethif;
mbed_official 0:51ac1d130fd4 161
mbed_official 0:51ac1d130fd4 162 /* put the new interface at the head of the list */
mbed_official 0:51ac1d130fd4 163 sc->next = pppoe_softc_list;
mbed_official 0:51ac1d130fd4 164 pppoe_softc_list = sc;
mbed_official 0:51ac1d130fd4 165
mbed_official 0:51ac1d130fd4 166 *scptr = sc;
mbed_official 0:51ac1d130fd4 167
mbed_official 0:51ac1d130fd4 168 return ERR_OK;
mbed_official 0:51ac1d130fd4 169 }
mbed_official 0:51ac1d130fd4 170
mbed_official 0:51ac1d130fd4 171 err_t
mbed_official 0:51ac1d130fd4 172 pppoe_destroy(struct netif *ifp)
mbed_official 0:51ac1d130fd4 173 {
mbed_official 0:51ac1d130fd4 174 struct pppoe_softc *sc, *prev = NULL;
mbed_official 0:51ac1d130fd4 175
mbed_official 0:51ac1d130fd4 176 for (sc = pppoe_softc_list; sc != NULL; prev = sc, sc = sc->next) {
mbed_official 0:51ac1d130fd4 177 if (sc->sc_ethif == ifp) {
mbed_official 0:51ac1d130fd4 178 break;
mbed_official 0:51ac1d130fd4 179 }
mbed_official 0:51ac1d130fd4 180 }
mbed_official 0:51ac1d130fd4 181
mbed_official 0:51ac1d130fd4 182 if(!(sc && (sc->sc_ethif == ifp))) {
mbed_official 0:51ac1d130fd4 183 return ERR_IF;
mbed_official 0:51ac1d130fd4 184 }
mbed_official 0:51ac1d130fd4 185
mbed_official 0:51ac1d130fd4 186 sys_untimeout(pppoe_timeout, sc);
mbed_official 0:51ac1d130fd4 187 if (prev == NULL) {
mbed_official 0:51ac1d130fd4 188 /* remove sc from the head of the list */
mbed_official 0:51ac1d130fd4 189 pppoe_softc_list = sc->next;
mbed_official 0:51ac1d130fd4 190 } else {
mbed_official 0:51ac1d130fd4 191 /* remove sc from the list */
mbed_official 0:51ac1d130fd4 192 prev->next = sc->next;
mbed_official 0:51ac1d130fd4 193 }
mbed_official 0:51ac1d130fd4 194
mbed_official 0:51ac1d130fd4 195 #ifdef PPPOE_TODO
mbed_official 0:51ac1d130fd4 196 if (sc->sc_concentrator_name) {
mbed_official 0:51ac1d130fd4 197 mem_free(sc->sc_concentrator_name);
mbed_official 0:51ac1d130fd4 198 }
mbed_official 0:51ac1d130fd4 199 if (sc->sc_service_name) {
mbed_official 0:51ac1d130fd4 200 mem_free(sc->sc_service_name);
mbed_official 0:51ac1d130fd4 201 }
mbed_official 0:51ac1d130fd4 202 #endif /* PPPOE_TODO */
mbed_official 0:51ac1d130fd4 203 memp_free(MEMP_PPPOE_IF, sc);
mbed_official 0:51ac1d130fd4 204
mbed_official 0:51ac1d130fd4 205 return ERR_OK;
mbed_official 0:51ac1d130fd4 206 }
mbed_official 0:51ac1d130fd4 207
mbed_official 0:51ac1d130fd4 208 /*
mbed_official 0:51ac1d130fd4 209 * Find the interface handling the specified session.
mbed_official 0:51ac1d130fd4 210 * Note: O(number of sessions open), this is a client-side only, mean
mbed_official 0:51ac1d130fd4 211 * and lean implementation, so number of open sessions typically should
mbed_official 0:51ac1d130fd4 212 * be 1.
mbed_official 0:51ac1d130fd4 213 */
mbed_official 0:51ac1d130fd4 214 static struct pppoe_softc *
mbed_official 0:51ac1d130fd4 215 pppoe_find_softc_by_session(u_int session, struct netif *rcvif)
mbed_official 0:51ac1d130fd4 216 {
mbed_official 0:51ac1d130fd4 217 struct pppoe_softc *sc;
mbed_official 0:51ac1d130fd4 218
mbed_official 0:51ac1d130fd4 219 if (session == 0) {
mbed_official 0:51ac1d130fd4 220 return NULL;
mbed_official 0:51ac1d130fd4 221 }
mbed_official 0:51ac1d130fd4 222
mbed_official 0:51ac1d130fd4 223 for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
mbed_official 0:51ac1d130fd4 224 if (sc->sc_state == PPPOE_STATE_SESSION
mbed_official 0:51ac1d130fd4 225 && sc->sc_session == session) {
mbed_official 0:51ac1d130fd4 226 if (sc->sc_ethif == rcvif) {
mbed_official 0:51ac1d130fd4 227 return sc;
mbed_official 0:51ac1d130fd4 228 } else {
mbed_official 0:51ac1d130fd4 229 return NULL;
mbed_official 0:51ac1d130fd4 230 }
mbed_official 0:51ac1d130fd4 231 }
mbed_official 0:51ac1d130fd4 232 }
mbed_official 0:51ac1d130fd4 233 return NULL;
mbed_official 0:51ac1d130fd4 234 }
mbed_official 0:51ac1d130fd4 235
mbed_official 0:51ac1d130fd4 236 /* Check host unique token passed and return appropriate softc pointer,
mbed_official 0:51ac1d130fd4 237 * or NULL if token is bogus. */
mbed_official 0:51ac1d130fd4 238 static struct pppoe_softc *
mbed_official 0:51ac1d130fd4 239 pppoe_find_softc_by_hunique(u8_t *token, size_t len, struct netif *rcvif)
mbed_official 0:51ac1d130fd4 240 {
mbed_official 0:51ac1d130fd4 241 struct pppoe_softc *sc, *t;
mbed_official 0:51ac1d130fd4 242
mbed_official 0:51ac1d130fd4 243 if (pppoe_softc_list == NULL) {
mbed_official 0:51ac1d130fd4 244 return NULL;
mbed_official 0:51ac1d130fd4 245 }
mbed_official 0:51ac1d130fd4 246
mbed_official 0:51ac1d130fd4 247 if (len != sizeof sc) {
mbed_official 0:51ac1d130fd4 248 return NULL;
mbed_official 0:51ac1d130fd4 249 }
mbed_official 0:51ac1d130fd4 250 MEMCPY(&t, token, len);
mbed_official 0:51ac1d130fd4 251
mbed_official 0:51ac1d130fd4 252 for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
mbed_official 0:51ac1d130fd4 253 if (sc == t) {
mbed_official 0:51ac1d130fd4 254 break;
mbed_official 0:51ac1d130fd4 255 }
mbed_official 0:51ac1d130fd4 256 }
mbed_official 0:51ac1d130fd4 257
mbed_official 0:51ac1d130fd4 258 if (sc == NULL) {
mbed_official 0:51ac1d130fd4 259 PPPDEBUG(LOG_DEBUG, ("pppoe: alien host unique tag, no session found\n"));
mbed_official 0:51ac1d130fd4 260 return NULL;
mbed_official 0:51ac1d130fd4 261 }
mbed_official 0:51ac1d130fd4 262
mbed_official 0:51ac1d130fd4 263 /* should be safe to access *sc now */
mbed_official 0:51ac1d130fd4 264 if (sc->sc_state < PPPOE_STATE_PADI_SENT || sc->sc_state >= PPPOE_STATE_SESSION) {
mbed_official 0:51ac1d130fd4 265 printf("%c%c%"U16_F": host unique tag found, but it belongs to a connection in state %d\n",
mbed_official 0:51ac1d130fd4 266 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_state);
mbed_official 0:51ac1d130fd4 267 return NULL;
mbed_official 0:51ac1d130fd4 268 }
mbed_official 0:51ac1d130fd4 269 if (sc->sc_ethif != rcvif) {
mbed_official 0:51ac1d130fd4 270 printf("%c%c%"U16_F": wrong interface, not accepting host unique\n",
mbed_official 0:51ac1d130fd4 271 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
mbed_official 0:51ac1d130fd4 272 return NULL;
mbed_official 0:51ac1d130fd4 273 }
mbed_official 0:51ac1d130fd4 274 return sc;
mbed_official 0:51ac1d130fd4 275 }
mbed_official 0:51ac1d130fd4 276
mbed_official 0:51ac1d130fd4 277 static void
mbed_official 0:51ac1d130fd4 278 pppoe_linkstatus_up(struct pppoe_softc *sc)
mbed_official 0:51ac1d130fd4 279 {
mbed_official 0:51ac1d130fd4 280 sc->sc_linkStatusCB(sc->sc_pd, 1);
mbed_official 0:51ac1d130fd4 281 }
mbed_official 0:51ac1d130fd4 282
mbed_official 0:51ac1d130fd4 283 /* analyze and handle a single received packet while not in session state */
mbed_official 0:51ac1d130fd4 284 static void
mbed_official 0:51ac1d130fd4 285 pppoe_dispatch_disc_pkt(struct netif *netif, struct pbuf *pb)
mbed_official 0:51ac1d130fd4 286 {
mbed_official 0:51ac1d130fd4 287 u16_t tag, len;
mbed_official 0:51ac1d130fd4 288 u16_t session, plen;
mbed_official 0:51ac1d130fd4 289 struct pppoe_softc *sc;
mbed_official 0:51ac1d130fd4 290 const char *err_msg;
mbed_official 0:51ac1d130fd4 291 char devname[6];
mbed_official 0:51ac1d130fd4 292 u8_t *ac_cookie;
mbed_official 0:51ac1d130fd4 293 u16_t ac_cookie_len;
mbed_official 0:51ac1d130fd4 294 #ifdef PPPOE_SERVER
mbed_official 0:51ac1d130fd4 295 u8_t *hunique;
mbed_official 0:51ac1d130fd4 296 size_t hunique_len;
mbed_official 0:51ac1d130fd4 297 #endif
mbed_official 0:51ac1d130fd4 298 struct pppoehdr *ph;
mbed_official 0:51ac1d130fd4 299 struct pppoetag pt;
mbed_official 0:51ac1d130fd4 300 int off, err, errortag;
mbed_official 0:51ac1d130fd4 301 struct eth_hdr *ethhdr;
mbed_official 0:51ac1d130fd4 302
mbed_official 0:51ac1d130fd4 303 pb = pppSingleBuf(pb);
mbed_official 0:51ac1d130fd4 304
mbed_official 0:51ac1d130fd4 305 strcpy(devname, "pppoe"); /* as long as we don't know which instance */
mbed_official 0:51ac1d130fd4 306 err_msg = NULL;
mbed_official 0:51ac1d130fd4 307 errortag = 0;
mbed_official 0:51ac1d130fd4 308 if (pb->len < sizeof(*ethhdr)) {
mbed_official 0:51ac1d130fd4 309 goto done;
mbed_official 0:51ac1d130fd4 310 }
mbed_official 0:51ac1d130fd4 311 ethhdr = (struct eth_hdr *)pb->payload;
mbed_official 0:51ac1d130fd4 312 off = sizeof(*ethhdr);
mbed_official 0:51ac1d130fd4 313
mbed_official 0:51ac1d130fd4 314 ac_cookie = NULL;
mbed_official 0:51ac1d130fd4 315 ac_cookie_len = 0;
mbed_official 0:51ac1d130fd4 316 #ifdef PPPOE_SERVER
mbed_official 0:51ac1d130fd4 317 hunique = NULL;
mbed_official 0:51ac1d130fd4 318 hunique_len = 0;
mbed_official 0:51ac1d130fd4 319 #endif
mbed_official 0:51ac1d130fd4 320 session = 0;
mbed_official 0:51ac1d130fd4 321 if (pb->len - off < PPPOE_HEADERLEN) {
mbed_official 0:51ac1d130fd4 322 printf("pppoe: packet too short: %d\n", pb->len);
mbed_official 0:51ac1d130fd4 323 goto done;
mbed_official 0:51ac1d130fd4 324 }
mbed_official 0:51ac1d130fd4 325
mbed_official 0:51ac1d130fd4 326 ph = (struct pppoehdr *) (ethhdr + 1);
mbed_official 0:51ac1d130fd4 327 if (ph->vertype != PPPOE_VERTYPE) {
mbed_official 0:51ac1d130fd4 328 printf("pppoe: unknown version/type packet: 0x%x\n", ph->vertype);
mbed_official 0:51ac1d130fd4 329 goto done;
mbed_official 0:51ac1d130fd4 330 }
mbed_official 0:51ac1d130fd4 331 session = ntohs(ph->session);
mbed_official 0:51ac1d130fd4 332 plen = ntohs(ph->plen);
mbed_official 0:51ac1d130fd4 333 off += sizeof(*ph);
mbed_official 0:51ac1d130fd4 334
mbed_official 0:51ac1d130fd4 335 if (plen + off > pb->len) {
mbed_official 0:51ac1d130fd4 336 printf("pppoe: packet content does not fit: data available = %d, packet size = %u\n",
mbed_official 0:51ac1d130fd4 337 pb->len - off, plen);
mbed_official 0:51ac1d130fd4 338 goto done;
mbed_official 0:51ac1d130fd4 339 }
mbed_official 0:51ac1d130fd4 340 if(pb->tot_len == pb->len) {
mbed_official 0:51ac1d130fd4 341 pb->tot_len = pb->len = (u16_t)off + plen; /* ignore trailing garbage */
mbed_official 0:51ac1d130fd4 342 }
mbed_official 0:51ac1d130fd4 343 tag = 0;
mbed_official 0:51ac1d130fd4 344 len = 0;
mbed_official 0:51ac1d130fd4 345 sc = NULL;
mbed_official 0:51ac1d130fd4 346 while (off + sizeof(pt) <= pb->len) {
mbed_official 0:51ac1d130fd4 347 MEMCPY(&pt, (u8_t*)pb->payload + off, sizeof(pt));
mbed_official 0:51ac1d130fd4 348 tag = ntohs(pt.tag);
mbed_official 0:51ac1d130fd4 349 len = ntohs(pt.len);
mbed_official 0:51ac1d130fd4 350 if (off + sizeof(pt) + len > pb->len) {
mbed_official 0:51ac1d130fd4 351 printf("pppoe: tag 0x%x len 0x%x is too long\n", tag, len);
mbed_official 0:51ac1d130fd4 352 goto done;
mbed_official 0:51ac1d130fd4 353 }
mbed_official 0:51ac1d130fd4 354 switch (tag) {
mbed_official 0:51ac1d130fd4 355 case PPPOE_TAG_EOL:
mbed_official 0:51ac1d130fd4 356 goto breakbreak;
mbed_official 0:51ac1d130fd4 357 case PPPOE_TAG_SNAME:
mbed_official 0:51ac1d130fd4 358 break; /* ignored */
mbed_official 0:51ac1d130fd4 359 case PPPOE_TAG_ACNAME:
mbed_official 0:51ac1d130fd4 360 break; /* ignored */
mbed_official 0:51ac1d130fd4 361 case PPPOE_TAG_HUNIQUE:
mbed_official 0:51ac1d130fd4 362 if (sc != NULL) {
mbed_official 0:51ac1d130fd4 363 break;
mbed_official 0:51ac1d130fd4 364 }
mbed_official 0:51ac1d130fd4 365 #ifdef PPPOE_SERVER
mbed_official 0:51ac1d130fd4 366 hunique = (u8_t*)pb->payload + off + sizeof(pt);
mbed_official 0:51ac1d130fd4 367 hunique_len = len;
mbed_official 0:51ac1d130fd4 368 #endif
mbed_official 0:51ac1d130fd4 369 sc = pppoe_find_softc_by_hunique((u8_t*)pb->payload + off + sizeof(pt), len, netif);
mbed_official 0:51ac1d130fd4 370 if (sc != NULL) {
mbed_official 0:51ac1d130fd4 371 snprintf(devname, sizeof(devname), "%c%c%"U16_F, sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
mbed_official 0:51ac1d130fd4 372 }
mbed_official 0:51ac1d130fd4 373 break;
mbed_official 0:51ac1d130fd4 374 case PPPOE_TAG_ACCOOKIE:
mbed_official 0:51ac1d130fd4 375 if (ac_cookie == NULL) {
mbed_official 0:51ac1d130fd4 376 ac_cookie = (u8_t*)pb->payload + off + sizeof(pt);
mbed_official 0:51ac1d130fd4 377 ac_cookie_len = len;
mbed_official 0:51ac1d130fd4 378 }
mbed_official 0:51ac1d130fd4 379 break;
mbed_official 0:51ac1d130fd4 380 case PPPOE_TAG_SNAME_ERR:
mbed_official 0:51ac1d130fd4 381 err_msg = "SERVICE NAME ERROR";
mbed_official 0:51ac1d130fd4 382 errortag = 1;
mbed_official 0:51ac1d130fd4 383 break;
mbed_official 0:51ac1d130fd4 384 case PPPOE_TAG_ACSYS_ERR:
mbed_official 0:51ac1d130fd4 385 err_msg = "AC SYSTEM ERROR";
mbed_official 0:51ac1d130fd4 386 errortag = 1;
mbed_official 0:51ac1d130fd4 387 break;
mbed_official 0:51ac1d130fd4 388 case PPPOE_TAG_GENERIC_ERR:
mbed_official 0:51ac1d130fd4 389 err_msg = "GENERIC ERROR";
mbed_official 0:51ac1d130fd4 390 errortag = 1;
mbed_official 0:51ac1d130fd4 391 break;
mbed_official 0:51ac1d130fd4 392 }
mbed_official 0:51ac1d130fd4 393 if (err_msg) {
mbed_official 0:51ac1d130fd4 394 if (errortag && len) {
mbed_official 0:51ac1d130fd4 395 u16_t error_len = LWIP_MIN(len, sizeof(pppoe_error_tmp)-1);
mbed_official 0:51ac1d130fd4 396 strncpy(pppoe_error_tmp, (char*)pb->payload + off + sizeof(pt), error_len);
mbed_official 0:51ac1d130fd4 397 pppoe_error_tmp[error_len-1] = '\0';
mbed_official 0:51ac1d130fd4 398 printf("%s: %s: %s\n", devname, err_msg, pppoe_error_tmp);
mbed_official 0:51ac1d130fd4 399 } else {
mbed_official 0:51ac1d130fd4 400 printf("%s: %s\n", devname, err_msg);
mbed_official 0:51ac1d130fd4 401 }
mbed_official 0:51ac1d130fd4 402 if (errortag) {
mbed_official 0:51ac1d130fd4 403 goto done;
mbed_official 0:51ac1d130fd4 404 }
mbed_official 0:51ac1d130fd4 405 }
mbed_official 0:51ac1d130fd4 406 off += sizeof(pt) + len;
mbed_official 0:51ac1d130fd4 407 }
mbed_official 0:51ac1d130fd4 408
mbed_official 0:51ac1d130fd4 409 breakbreak:;
mbed_official 0:51ac1d130fd4 410 switch (ph->code) {
mbed_official 0:51ac1d130fd4 411 case PPPOE_CODE_PADI:
mbed_official 0:51ac1d130fd4 412 #ifdef PPPOE_SERVER
mbed_official 0:51ac1d130fd4 413 /*
mbed_official 0:51ac1d130fd4 414 * got service name, concentrator name, and/or host unique.
mbed_official 0:51ac1d130fd4 415 * ignore if we have no interfaces with IFF_PASSIVE|IFF_UP.
mbed_official 0:51ac1d130fd4 416 */
mbed_official 0:51ac1d130fd4 417 if (LIST_EMPTY(&pppoe_softc_list)) {
mbed_official 0:51ac1d130fd4 418 goto done;
mbed_official 0:51ac1d130fd4 419 }
mbed_official 0:51ac1d130fd4 420 LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
mbed_official 0:51ac1d130fd4 421 if (!(sc->sc_sppp.pp_if.if_flags & IFF_UP)) {
mbed_official 0:51ac1d130fd4 422 continue;
mbed_official 0:51ac1d130fd4 423 }
mbed_official 0:51ac1d130fd4 424 if (!(sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
mbed_official 0:51ac1d130fd4 425 continue;
mbed_official 0:51ac1d130fd4 426 }
mbed_official 0:51ac1d130fd4 427 if (sc->sc_state == PPPOE_STATE_INITIAL) {
mbed_official 0:51ac1d130fd4 428 break;
mbed_official 0:51ac1d130fd4 429 }
mbed_official 0:51ac1d130fd4 430 }
mbed_official 0:51ac1d130fd4 431 if (sc == NULL) {
mbed_official 0:51ac1d130fd4 432 /* printf("pppoe: free passive interface is not found\n"); */
mbed_official 0:51ac1d130fd4 433 goto done;
mbed_official 0:51ac1d130fd4 434 }
mbed_official 0:51ac1d130fd4 435 if (hunique) {
mbed_official 0:51ac1d130fd4 436 if (sc->sc_hunique) {
mbed_official 0:51ac1d130fd4 437 mem_free(sc->sc_hunique);
mbed_official 0:51ac1d130fd4 438 }
mbed_official 0:51ac1d130fd4 439 sc->sc_hunique = mem_malloc(hunique_len);
mbed_official 0:51ac1d130fd4 440 if (sc->sc_hunique == NULL) {
mbed_official 0:51ac1d130fd4 441 goto done;
mbed_official 0:51ac1d130fd4 442 }
mbed_official 0:51ac1d130fd4 443 sc->sc_hunique_len = hunique_len;
mbed_official 0:51ac1d130fd4 444 MEMCPY(sc->sc_hunique, hunique, hunique_len);
mbed_official 0:51ac1d130fd4 445 }
mbed_official 0:51ac1d130fd4 446 MEMCPY(&sc->sc_dest, eh->ether_shost, sizeof sc->sc_dest);
mbed_official 0:51ac1d130fd4 447 sc->sc_state = PPPOE_STATE_PADO_SENT;
mbed_official 0:51ac1d130fd4 448 pppoe_send_pado(sc);
mbed_official 0:51ac1d130fd4 449 break;
mbed_official 0:51ac1d130fd4 450 #endif /* PPPOE_SERVER */
mbed_official 0:51ac1d130fd4 451 case PPPOE_CODE_PADR:
mbed_official 0:51ac1d130fd4 452 #ifdef PPPOE_SERVER
mbed_official 0:51ac1d130fd4 453 /*
mbed_official 0:51ac1d130fd4 454 * get sc from ac_cookie if IFF_PASSIVE
mbed_official 0:51ac1d130fd4 455 */
mbed_official 0:51ac1d130fd4 456 if (ac_cookie == NULL) {
mbed_official 0:51ac1d130fd4 457 /* be quiet if there is not a single pppoe instance */
mbed_official 0:51ac1d130fd4 458 printf("pppoe: received PADR but not includes ac_cookie\n");
mbed_official 0:51ac1d130fd4 459 goto done;
mbed_official 0:51ac1d130fd4 460 }
mbed_official 0:51ac1d130fd4 461 sc = pppoe_find_softc_by_hunique(ac_cookie, ac_cookie_len, netif);
mbed_official 0:51ac1d130fd4 462 if (sc == NULL) {
mbed_official 0:51ac1d130fd4 463 /* be quiet if there is not a single pppoe instance */
mbed_official 0:51ac1d130fd4 464 if (!LIST_EMPTY(&pppoe_softc_list)) {
mbed_official 0:51ac1d130fd4 465 printf("pppoe: received PADR but could not find request for it\n");
mbed_official 0:51ac1d130fd4 466 }
mbed_official 0:51ac1d130fd4 467 goto done;
mbed_official 0:51ac1d130fd4 468 }
mbed_official 0:51ac1d130fd4 469 if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
mbed_official 0:51ac1d130fd4 470 printf("%c%c%"U16_F": received unexpected PADR\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
mbed_official 0:51ac1d130fd4 471 goto done;
mbed_official 0:51ac1d130fd4 472 }
mbed_official 0:51ac1d130fd4 473 if (hunique) {
mbed_official 0:51ac1d130fd4 474 if (sc->sc_hunique) {
mbed_official 0:51ac1d130fd4 475 mem_free(sc->sc_hunique);
mbed_official 0:51ac1d130fd4 476 }
mbed_official 0:51ac1d130fd4 477 sc->sc_hunique = mem_malloc(hunique_len);
mbed_official 0:51ac1d130fd4 478 if (sc->sc_hunique == NULL) {
mbed_official 0:51ac1d130fd4 479 goto done;
mbed_official 0:51ac1d130fd4 480 }
mbed_official 0:51ac1d130fd4 481 sc->sc_hunique_len = hunique_len;
mbed_official 0:51ac1d130fd4 482 MEMCPY(sc->sc_hunique, hunique, hunique_len);
mbed_official 0:51ac1d130fd4 483 }
mbed_official 0:51ac1d130fd4 484 pppoe_send_pads(sc);
mbed_official 0:51ac1d130fd4 485 sc->sc_state = PPPOE_STATE_SESSION;
mbed_official 0:51ac1d130fd4 486 pppoe_linkstatus_up(sc); /* notify upper layers */
mbed_official 0:51ac1d130fd4 487 break;
mbed_official 0:51ac1d130fd4 488 #else
mbed_official 0:51ac1d130fd4 489 /* ignore, we are no access concentrator */
mbed_official 0:51ac1d130fd4 490 goto done;
mbed_official 0:51ac1d130fd4 491 #endif /* PPPOE_SERVER */
mbed_official 0:51ac1d130fd4 492 case PPPOE_CODE_PADO:
mbed_official 0:51ac1d130fd4 493 if (sc == NULL) {
mbed_official 0:51ac1d130fd4 494 /* be quiet if there is not a single pppoe instance */
mbed_official 0:51ac1d130fd4 495 if (pppoe_softc_list != NULL) {
mbed_official 0:51ac1d130fd4 496 printf("pppoe: received PADO but could not find request for it\n");
mbed_official 0:51ac1d130fd4 497 }
mbed_official 0:51ac1d130fd4 498 goto done;
mbed_official 0:51ac1d130fd4 499 }
mbed_official 0:51ac1d130fd4 500 if (sc->sc_state != PPPOE_STATE_PADI_SENT) {
mbed_official 0:51ac1d130fd4 501 printf("%c%c%"U16_F": received unexpected PADO\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
mbed_official 0:51ac1d130fd4 502 goto done;
mbed_official 0:51ac1d130fd4 503 }
mbed_official 0:51ac1d130fd4 504 if (ac_cookie) {
mbed_official 0:51ac1d130fd4 505 sc->sc_ac_cookie_len = ac_cookie_len;
mbed_official 0:51ac1d130fd4 506 MEMCPY(sc->sc_ac_cookie, ac_cookie, ac_cookie_len);
mbed_official 0:51ac1d130fd4 507 }
mbed_official 0:51ac1d130fd4 508 MEMCPY(&sc->sc_dest, ethhdr->src.addr, sizeof(sc->sc_dest.addr));
mbed_official 0:51ac1d130fd4 509 sys_untimeout(pppoe_timeout, sc);
mbed_official 0:51ac1d130fd4 510 sc->sc_padr_retried = 0;
mbed_official 0:51ac1d130fd4 511 sc->sc_state = PPPOE_STATE_PADR_SENT;
mbed_official 0:51ac1d130fd4 512 if ((err = pppoe_send_padr(sc)) != 0) {
mbed_official 0:51ac1d130fd4 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));
mbed_official 0:51ac1d130fd4 514 }
mbed_official 0:51ac1d130fd4 515 sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
mbed_official 0:51ac1d130fd4 516 break;
mbed_official 0:51ac1d130fd4 517 case PPPOE_CODE_PADS:
mbed_official 0:51ac1d130fd4 518 if (sc == NULL) {
mbed_official 0:51ac1d130fd4 519 goto done;
mbed_official 0:51ac1d130fd4 520 }
mbed_official 0:51ac1d130fd4 521 sc->sc_session = session;
mbed_official 0:51ac1d130fd4 522 sys_untimeout(pppoe_timeout, sc);
mbed_official 0:51ac1d130fd4 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));
mbed_official 0:51ac1d130fd4 524 sc->sc_state = PPPOE_STATE_SESSION;
mbed_official 0:51ac1d130fd4 525 pppoe_linkstatus_up(sc); /* notify upper layers */
mbed_official 0:51ac1d130fd4 526 break;
mbed_official 0:51ac1d130fd4 527 case PPPOE_CODE_PADT:
mbed_official 0:51ac1d130fd4 528 if (sc == NULL) {
mbed_official 0:51ac1d130fd4 529 goto done;
mbed_official 0:51ac1d130fd4 530 }
mbed_official 0:51ac1d130fd4 531 pppoe_clear_softc(sc, "received PADT");
mbed_official 0:51ac1d130fd4 532 break;
mbed_official 0:51ac1d130fd4 533 default:
mbed_official 0:51ac1d130fd4 534 if(sc) {
mbed_official 0:51ac1d130fd4 535 printf("%c%c%"U16_F": unknown code (0x%"X16_F") session = 0x%"X16_F"\n",
mbed_official 0:51ac1d130fd4 536 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
mbed_official 0:51ac1d130fd4 537 (u16_t)ph->code, session);
mbed_official 0:51ac1d130fd4 538 } else {
mbed_official 0:51ac1d130fd4 539 printf("pppoe: unknown code (0x%"X16_F") session = 0x%"X16_F"\n", (u16_t)ph->code, session);
mbed_official 0:51ac1d130fd4 540 }
mbed_official 0:51ac1d130fd4 541 break;
mbed_official 0:51ac1d130fd4 542 }
mbed_official 0:51ac1d130fd4 543
mbed_official 0:51ac1d130fd4 544 done:
mbed_official 0:51ac1d130fd4 545 pbuf_free(pb);
mbed_official 0:51ac1d130fd4 546 return;
mbed_official 0:51ac1d130fd4 547 }
mbed_official 0:51ac1d130fd4 548
mbed_official 0:51ac1d130fd4 549 void
mbed_official 0:51ac1d130fd4 550 pppoe_disc_input(struct netif *netif, struct pbuf *p)
mbed_official 0:51ac1d130fd4 551 {
mbed_official 0:51ac1d130fd4 552 /* avoid error messages if there is not a single pppoe instance */
mbed_official 0:51ac1d130fd4 553 if (pppoe_softc_list != NULL) {
mbed_official 0:51ac1d130fd4 554 pppoe_dispatch_disc_pkt(netif, p);
mbed_official 0:51ac1d130fd4 555 } else {
mbed_official 0:51ac1d130fd4 556 pbuf_free(p);
mbed_official 0:51ac1d130fd4 557 }
mbed_official 0:51ac1d130fd4 558 }
mbed_official 0:51ac1d130fd4 559
mbed_official 0:51ac1d130fd4 560 void
mbed_official 0:51ac1d130fd4 561 pppoe_data_input(struct netif *netif, struct pbuf *pb)
mbed_official 0:51ac1d130fd4 562 {
mbed_official 0:51ac1d130fd4 563 u16_t session, plen;
mbed_official 0:51ac1d130fd4 564 struct pppoe_softc *sc;
mbed_official 0:51ac1d130fd4 565 struct pppoehdr *ph;
mbed_official 0:51ac1d130fd4 566 #ifdef PPPOE_TERM_UNKNOWN_SESSIONS
mbed_official 0:51ac1d130fd4 567 u8_t shost[ETHER_ADDR_LEN];
mbed_official 0:51ac1d130fd4 568 #endif
mbed_official 0:51ac1d130fd4 569
mbed_official 0:51ac1d130fd4 570 #ifdef PPPOE_TERM_UNKNOWN_SESSIONS
mbed_official 0:51ac1d130fd4 571 MEMCPY(shost, ((struct eth_hdr *)pb->payload)->src.addr, sizeof(shost));
mbed_official 0:51ac1d130fd4 572 #endif
mbed_official 0:51ac1d130fd4 573 if (pbuf_header(pb, -(int)sizeof(struct eth_hdr)) != 0) {
mbed_official 0:51ac1d130fd4 574 /* bail out */
mbed_official 0:51ac1d130fd4 575 PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header failed\n"));
mbed_official 0:51ac1d130fd4 576 LINK_STATS_INC(link.lenerr);
mbed_official 0:51ac1d130fd4 577 goto drop;
mbed_official 0:51ac1d130fd4 578 }
mbed_official 0:51ac1d130fd4 579
mbed_official 0:51ac1d130fd4 580 pb = pppSingleBuf (pb);
mbed_official 0:51ac1d130fd4 581
mbed_official 0:51ac1d130fd4 582 if (pb->len <= PPPOE_HEADERLEN) {
mbed_official 0:51ac1d130fd4 583 printf("pppoe (data): dropping too short packet: %d bytes\n", pb->len);
mbed_official 0:51ac1d130fd4 584 goto drop;
mbed_official 0:51ac1d130fd4 585 }
mbed_official 0:51ac1d130fd4 586
mbed_official 0:51ac1d130fd4 587 if (pb->len < sizeof(*ph)) {
mbed_official 0:51ac1d130fd4 588 printf("pppoe_data_input: could not get PPPoE header\n");
mbed_official 0:51ac1d130fd4 589 goto drop;
mbed_official 0:51ac1d130fd4 590 }
mbed_official 0:51ac1d130fd4 591 ph = (struct pppoehdr *)pb->payload;
mbed_official 0:51ac1d130fd4 592
mbed_official 0:51ac1d130fd4 593 if (ph->vertype != PPPOE_VERTYPE) {
mbed_official 0:51ac1d130fd4 594 printf("pppoe (data): unknown version/type packet: 0x%x\n", ph->vertype);
mbed_official 0:51ac1d130fd4 595 goto drop;
mbed_official 0:51ac1d130fd4 596 }
mbed_official 0:51ac1d130fd4 597 if (ph->code != 0) {
mbed_official 0:51ac1d130fd4 598 goto drop;
mbed_official 0:51ac1d130fd4 599 }
mbed_official 0:51ac1d130fd4 600
mbed_official 0:51ac1d130fd4 601 session = ntohs(ph->session);
mbed_official 0:51ac1d130fd4 602 sc = pppoe_find_softc_by_session(session, netif);
mbed_official 0:51ac1d130fd4 603 if (sc == NULL) {
mbed_official 0:51ac1d130fd4 604 #ifdef PPPOE_TERM_UNKNOWN_SESSIONS
mbed_official 0:51ac1d130fd4 605 printf("pppoe: input for unknown session 0x%x, sending PADT\n", session);
mbed_official 0:51ac1d130fd4 606 pppoe_send_padt(netif, session, shost);
mbed_official 0:51ac1d130fd4 607 #endif
mbed_official 0:51ac1d130fd4 608 goto drop;
mbed_official 0:51ac1d130fd4 609 }
mbed_official 0:51ac1d130fd4 610
mbed_official 0:51ac1d130fd4 611 plen = ntohs(ph->plen);
mbed_official 0:51ac1d130fd4 612
mbed_official 0:51ac1d130fd4 613 if (pbuf_header(pb, -(int)(PPPOE_HEADERLEN)) != 0) {
mbed_official 0:51ac1d130fd4 614 /* bail out */
mbed_official 0:51ac1d130fd4 615 PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header PPPOE_HEADERLEN failed\n"));
mbed_official 0:51ac1d130fd4 616 LINK_STATS_INC(link.lenerr);
mbed_official 0:51ac1d130fd4 617 goto drop;
mbed_official 0:51ac1d130fd4 618 }
mbed_official 0:51ac1d130fd4 619
mbed_official 0:51ac1d130fd4 620 PPPDEBUG(LOG_DEBUG, ("pppoe_data_input: %c%c%"U16_F": pkthdr.len=%d, pppoe.len=%d\n",
mbed_official 0:51ac1d130fd4 621 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
mbed_official 0:51ac1d130fd4 622 pb->len, plen));
mbed_official 0:51ac1d130fd4 623
mbed_official 0:51ac1d130fd4 624 if (pb->len < plen) {
mbed_official 0:51ac1d130fd4 625 goto drop;
mbed_official 0:51ac1d130fd4 626 }
mbed_official 0:51ac1d130fd4 627
mbed_official 0:51ac1d130fd4 628 pppInProcOverEthernet(sc->sc_pd, pb);
mbed_official 0:51ac1d130fd4 629
mbed_official 0:51ac1d130fd4 630 return;
mbed_official 0:51ac1d130fd4 631
mbed_official 0:51ac1d130fd4 632 drop:
mbed_official 0:51ac1d130fd4 633 pbuf_free(pb);
mbed_official 0:51ac1d130fd4 634 }
mbed_official 0:51ac1d130fd4 635
mbed_official 0:51ac1d130fd4 636 static err_t
mbed_official 0:51ac1d130fd4 637 pppoe_output(struct pppoe_softc *sc, struct pbuf *pb)
mbed_official 0:51ac1d130fd4 638 {
mbed_official 0:51ac1d130fd4 639 struct eth_hdr *ethhdr;
mbed_official 0:51ac1d130fd4 640 u16_t etype;
mbed_official 0:51ac1d130fd4 641 err_t res;
mbed_official 0:51ac1d130fd4 642
mbed_official 0:51ac1d130fd4 643 if (!sc->sc_ethif) {
mbed_official 0:51ac1d130fd4 644 pbuf_free(pb);
mbed_official 0:51ac1d130fd4 645 return ERR_IF;
mbed_official 0:51ac1d130fd4 646 }
mbed_official 0:51ac1d130fd4 647
mbed_official 0:51ac1d130fd4 648 ethhdr = (struct eth_hdr *)pb->payload;
mbed_official 0:51ac1d130fd4 649 etype = sc->sc_state == PPPOE_STATE_SESSION ? ETHTYPE_PPPOE : ETHTYPE_PPPOEDISC;
mbed_official 0:51ac1d130fd4 650 ethhdr->type = htons(etype);
mbed_official 0:51ac1d130fd4 651 MEMCPY(ethhdr->dest.addr, sc->sc_dest.addr, sizeof(ethhdr->dest.addr));
mbed_official 0:51ac1d130fd4 652 MEMCPY(ethhdr->src.addr, ((struct eth_addr *)sc->sc_ethif->hwaddr)->addr, sizeof(ethhdr->src.addr));
mbed_official 0:51ac1d130fd4 653
mbed_official 0:51ac1d130fd4 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",
mbed_official 0:51ac1d130fd4 655 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, etype,
mbed_official 0:51ac1d130fd4 656 sc->sc_state, sc->sc_session,
mbed_official 0:51ac1d130fd4 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],
mbed_official 0:51ac1d130fd4 658 pb->tot_len));
mbed_official 0:51ac1d130fd4 659
mbed_official 0:51ac1d130fd4 660 res = sc->sc_ethif->linkoutput(sc->sc_ethif, pb);
mbed_official 0:51ac1d130fd4 661
mbed_official 0:51ac1d130fd4 662 pbuf_free(pb);
mbed_official 0:51ac1d130fd4 663
mbed_official 0:51ac1d130fd4 664 return res;
mbed_official 0:51ac1d130fd4 665 }
mbed_official 0:51ac1d130fd4 666
mbed_official 0:51ac1d130fd4 667 static err_t
mbed_official 0:51ac1d130fd4 668 pppoe_send_padi(struct pppoe_softc *sc)
mbed_official 0:51ac1d130fd4 669 {
mbed_official 0:51ac1d130fd4 670 struct pbuf *pb;
mbed_official 0:51ac1d130fd4 671 u8_t *p;
mbed_official 0:51ac1d130fd4 672 int len;
mbed_official 0:51ac1d130fd4 673 #ifdef PPPOE_TODO
mbed_official 0:51ac1d130fd4 674 int l1 = 0, l2 = 0; /* XXX: gcc */
mbed_official 0:51ac1d130fd4 675 #endif /* PPPOE_TODO */
mbed_official 0:51ac1d130fd4 676
mbed_official 0:51ac1d130fd4 677 if (sc->sc_state >PPPOE_STATE_PADI_SENT) {
mbed_official 0:51ac1d130fd4 678 PPPDEBUG(LOG_ERR, ("ERROR: pppoe_send_padi in state %d", sc->sc_state));
mbed_official 0:51ac1d130fd4 679 }
mbed_official 0:51ac1d130fd4 680
mbed_official 0:51ac1d130fd4 681 /* calculate length of frame (excluding ethernet header + pppoe header) */
mbed_official 0:51ac1d130fd4 682 len = 2 + 2 + 2 + 2 + sizeof sc; /* service name tag is required, host unique is send too */
mbed_official 0:51ac1d130fd4 683 #ifdef PPPOE_TODO
mbed_official 0:51ac1d130fd4 684 if (sc->sc_service_name != NULL) {
mbed_official 0:51ac1d130fd4 685 l1 = (int)strlen(sc->sc_service_name);
mbed_official 0:51ac1d130fd4 686 len += l1;
mbed_official 0:51ac1d130fd4 687 }
mbed_official 0:51ac1d130fd4 688 if (sc->sc_concentrator_name != NULL) {
mbed_official 0:51ac1d130fd4 689 l2 = (int)strlen(sc->sc_concentrator_name);
mbed_official 0:51ac1d130fd4 690 len += 2 + 2 + l2;
mbed_official 0:51ac1d130fd4 691 }
mbed_official 0:51ac1d130fd4 692 #endif /* PPPOE_TODO */
mbed_official 0:51ac1d130fd4 693 LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
mbed_official 0:51ac1d130fd4 694 sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
mbed_official 0:51ac1d130fd4 695
mbed_official 0:51ac1d130fd4 696 /* allocate a buffer */
mbed_official 0:51ac1d130fd4 697 pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
mbed_official 0:51ac1d130fd4 698 if (!pb) {
mbed_official 0:51ac1d130fd4 699 return ERR_MEM;
mbed_official 0:51ac1d130fd4 700 }
mbed_official 0:51ac1d130fd4 701 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
mbed_official 0:51ac1d130fd4 702
mbed_official 0:51ac1d130fd4 703 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
mbed_official 0:51ac1d130fd4 704 /* fill in pkt */
mbed_official 0:51ac1d130fd4 705 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADI, 0, (u16_t)len);
mbed_official 0:51ac1d130fd4 706 PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
mbed_official 0:51ac1d130fd4 707 #ifdef PPPOE_TODO
mbed_official 0:51ac1d130fd4 708 if (sc->sc_service_name != NULL) {
mbed_official 0:51ac1d130fd4 709 PPPOE_ADD_16(p, l1);
mbed_official 0:51ac1d130fd4 710 MEMCPY(p, sc->sc_service_name, l1);
mbed_official 0:51ac1d130fd4 711 p += l1;
mbed_official 0:51ac1d130fd4 712 } else
mbed_official 0:51ac1d130fd4 713 #endif /* PPPOE_TODO */
mbed_official 0:51ac1d130fd4 714 {
mbed_official 0:51ac1d130fd4 715 PPPOE_ADD_16(p, 0);
mbed_official 0:51ac1d130fd4 716 }
mbed_official 0:51ac1d130fd4 717 #ifdef PPPOE_TODO
mbed_official 0:51ac1d130fd4 718 if (sc->sc_concentrator_name != NULL) {
mbed_official 0:51ac1d130fd4 719 PPPOE_ADD_16(p, PPPOE_TAG_ACNAME);
mbed_official 0:51ac1d130fd4 720 PPPOE_ADD_16(p, l2);
mbed_official 0:51ac1d130fd4 721 MEMCPY(p, sc->sc_concentrator_name, l2);
mbed_official 0:51ac1d130fd4 722 p += l2;
mbed_official 0:51ac1d130fd4 723 }
mbed_official 0:51ac1d130fd4 724 #endif /* PPPOE_TODO */
mbed_official 0:51ac1d130fd4 725 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
mbed_official 0:51ac1d130fd4 726 PPPOE_ADD_16(p, sizeof(sc));
mbed_official 0:51ac1d130fd4 727 MEMCPY(p, &sc, sizeof sc);
mbed_official 0:51ac1d130fd4 728
mbed_official 0:51ac1d130fd4 729 /* send pkt */
mbed_official 0:51ac1d130fd4 730 return pppoe_output(sc, pb);
mbed_official 0:51ac1d130fd4 731 }
mbed_official 0:51ac1d130fd4 732
mbed_official 0:51ac1d130fd4 733 static void
mbed_official 0:51ac1d130fd4 734 pppoe_timeout(void *arg)
mbed_official 0:51ac1d130fd4 735 {
mbed_official 0:51ac1d130fd4 736 int retry_wait, err;
mbed_official 0:51ac1d130fd4 737 struct pppoe_softc *sc = (struct pppoe_softc*)arg;
mbed_official 0:51ac1d130fd4 738
mbed_official 0:51ac1d130fd4 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));
mbed_official 0:51ac1d130fd4 740
mbed_official 0:51ac1d130fd4 741 switch (sc->sc_state) {
mbed_official 0:51ac1d130fd4 742 case PPPOE_STATE_PADI_SENT:
mbed_official 0:51ac1d130fd4 743 /*
mbed_official 0:51ac1d130fd4 744 * We have two basic ways of retrying:
mbed_official 0:51ac1d130fd4 745 * - Quick retry mode: try a few times in short sequence
mbed_official 0:51ac1d130fd4 746 * - Slow retry mode: we already had a connection successfully
mbed_official 0:51ac1d130fd4 747 * established and will try infinitely (without user
mbed_official 0:51ac1d130fd4 748 * intervention)
mbed_official 0:51ac1d130fd4 749 * We only enter slow retry mode if IFF_LINK1 (aka autodial)
mbed_official 0:51ac1d130fd4 750 * is not set.
mbed_official 0:51ac1d130fd4 751 */
mbed_official 0:51ac1d130fd4 752
mbed_official 0:51ac1d130fd4 753 /* initialize for quick retry mode */
mbed_official 0:51ac1d130fd4 754 retry_wait = PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried);
mbed_official 0:51ac1d130fd4 755
mbed_official 0:51ac1d130fd4 756 sc->sc_padi_retried++;
mbed_official 0:51ac1d130fd4 757 if (sc->sc_padi_retried >= PPPOE_DISC_MAXPADI) {
mbed_official 0:51ac1d130fd4 758 #if 0
mbed_official 0:51ac1d130fd4 759 if ((sc->sc_sppp.pp_if.if_flags & IFF_LINK1) == 0) {
mbed_official 0:51ac1d130fd4 760 /* slow retry mode */
mbed_official 0:51ac1d130fd4 761 retry_wait = PPPOE_SLOW_RETRY;
mbed_official 0:51ac1d130fd4 762 } else
mbed_official 0:51ac1d130fd4 763 #endif
mbed_official 0:51ac1d130fd4 764 {
mbed_official 0:51ac1d130fd4 765 pppoe_abort_connect(sc);
mbed_official 0:51ac1d130fd4 766 return;
mbed_official 0:51ac1d130fd4 767 }
mbed_official 0:51ac1d130fd4 768 }
mbed_official 0:51ac1d130fd4 769 if ((err = pppoe_send_padi(sc)) != 0) {
mbed_official 0:51ac1d130fd4 770 sc->sc_padi_retried--;
mbed_official 0:51ac1d130fd4 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));
mbed_official 0:51ac1d130fd4 772 }
mbed_official 0:51ac1d130fd4 773 sys_timeout(retry_wait, pppoe_timeout, sc);
mbed_official 0:51ac1d130fd4 774 break;
mbed_official 0:51ac1d130fd4 775
mbed_official 0:51ac1d130fd4 776 case PPPOE_STATE_PADR_SENT:
mbed_official 0:51ac1d130fd4 777 sc->sc_padr_retried++;
mbed_official 0:51ac1d130fd4 778 if (sc->sc_padr_retried >= PPPOE_DISC_MAXPADR) {
mbed_official 0:51ac1d130fd4 779 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
mbed_official 0:51ac1d130fd4 780 sc->sc_state = PPPOE_STATE_PADI_SENT;
mbed_official 0:51ac1d130fd4 781 sc->sc_padr_retried = 0;
mbed_official 0:51ac1d130fd4 782 if ((err = pppoe_send_padi(sc)) != 0) {
mbed_official 0:51ac1d130fd4 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));
mbed_official 0:51ac1d130fd4 784 }
mbed_official 0:51ac1d130fd4 785 sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried), pppoe_timeout, sc);
mbed_official 0:51ac1d130fd4 786 return;
mbed_official 0:51ac1d130fd4 787 }
mbed_official 0:51ac1d130fd4 788 if ((err = pppoe_send_padr(sc)) != 0) {
mbed_official 0:51ac1d130fd4 789 sc->sc_padr_retried--;
mbed_official 0:51ac1d130fd4 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));
mbed_official 0:51ac1d130fd4 791 }
mbed_official 0:51ac1d130fd4 792 sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
mbed_official 0:51ac1d130fd4 793 break;
mbed_official 0:51ac1d130fd4 794 case PPPOE_STATE_CLOSING:
mbed_official 0:51ac1d130fd4 795 pppoe_do_disconnect(sc);
mbed_official 0:51ac1d130fd4 796 break;
mbed_official 0:51ac1d130fd4 797 default:
mbed_official 0:51ac1d130fd4 798 return; /* all done, work in peace */
mbed_official 0:51ac1d130fd4 799 }
mbed_official 0:51ac1d130fd4 800 }
mbed_official 0:51ac1d130fd4 801
mbed_official 0:51ac1d130fd4 802 /* Start a connection (i.e. initiate discovery phase) */
mbed_official 0:51ac1d130fd4 803 int
mbed_official 0:51ac1d130fd4 804 pppoe_connect(struct pppoe_softc *sc)
mbed_official 0:51ac1d130fd4 805 {
mbed_official 0:51ac1d130fd4 806 int err;
mbed_official 0:51ac1d130fd4 807
mbed_official 0:51ac1d130fd4 808 if (sc->sc_state != PPPOE_STATE_INITIAL) {
mbed_official 0:51ac1d130fd4 809 return EBUSY;
mbed_official 0:51ac1d130fd4 810 }
mbed_official 0:51ac1d130fd4 811
mbed_official 0:51ac1d130fd4 812 #ifdef PPPOE_SERVER
mbed_official 0:51ac1d130fd4 813 /* wait PADI if IFF_PASSIVE */
mbed_official 0:51ac1d130fd4 814 if ((sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
mbed_official 0:51ac1d130fd4 815 return 0;
mbed_official 0:51ac1d130fd4 816 }
mbed_official 0:51ac1d130fd4 817 #endif
mbed_official 0:51ac1d130fd4 818 /* save state, in case we fail to send PADI */
mbed_official 0:51ac1d130fd4 819 sc->sc_state = PPPOE_STATE_PADI_SENT;
mbed_official 0:51ac1d130fd4 820 sc->sc_padr_retried = 0;
mbed_official 0:51ac1d130fd4 821 err = pppoe_send_padi(sc);
mbed_official 0:51ac1d130fd4 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));
mbed_official 0:51ac1d130fd4 823 sys_timeout(PPPOE_DISC_TIMEOUT, pppoe_timeout, sc);
mbed_official 0:51ac1d130fd4 824 return err;
mbed_official 0:51ac1d130fd4 825 }
mbed_official 0:51ac1d130fd4 826
mbed_official 0:51ac1d130fd4 827 /* disconnect */
mbed_official 0:51ac1d130fd4 828 void
mbed_official 0:51ac1d130fd4 829 pppoe_disconnect(struct pppoe_softc *sc)
mbed_official 0:51ac1d130fd4 830 {
mbed_official 0:51ac1d130fd4 831 if (sc->sc_state < PPPOE_STATE_SESSION) {
mbed_official 0:51ac1d130fd4 832 return;
mbed_official 0:51ac1d130fd4 833 }
mbed_official 0:51ac1d130fd4 834 /*
mbed_official 0:51ac1d130fd4 835 * Do not call pppoe_disconnect here, the upper layer state
mbed_official 0:51ac1d130fd4 836 * machine gets confused by this. We must return from this
mbed_official 0:51ac1d130fd4 837 * function and defer disconnecting to the timeout handler.
mbed_official 0:51ac1d130fd4 838 */
mbed_official 0:51ac1d130fd4 839 sc->sc_state = PPPOE_STATE_CLOSING;
mbed_official 0:51ac1d130fd4 840 sys_timeout(20, pppoe_timeout, sc);
mbed_official 0:51ac1d130fd4 841 }
mbed_official 0:51ac1d130fd4 842
mbed_official 0:51ac1d130fd4 843 static int
mbed_official 0:51ac1d130fd4 844 pppoe_do_disconnect(struct pppoe_softc *sc)
mbed_official 0:51ac1d130fd4 845 {
mbed_official 0:51ac1d130fd4 846 int err;
mbed_official 0:51ac1d130fd4 847
mbed_official 0:51ac1d130fd4 848 if (sc->sc_state < PPPOE_STATE_SESSION) {
mbed_official 0:51ac1d130fd4 849 err = EBUSY;
mbed_official 0:51ac1d130fd4 850 } else {
mbed_official 0:51ac1d130fd4 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));
mbed_official 0:51ac1d130fd4 852 err = pppoe_send_padt(sc->sc_ethif, sc->sc_session, (const u8_t *)&sc->sc_dest);
mbed_official 0:51ac1d130fd4 853 }
mbed_official 0:51ac1d130fd4 854
mbed_official 0:51ac1d130fd4 855 /* cleanup softc */
mbed_official 0:51ac1d130fd4 856 sc->sc_state = PPPOE_STATE_INITIAL;
mbed_official 0:51ac1d130fd4 857 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
mbed_official 0:51ac1d130fd4 858 sc->sc_ac_cookie_len = 0;
mbed_official 0:51ac1d130fd4 859 #ifdef PPPOE_SERVER
mbed_official 0:51ac1d130fd4 860 if (sc->sc_hunique) {
mbed_official 0:51ac1d130fd4 861 mem_free(sc->sc_hunique);
mbed_official 0:51ac1d130fd4 862 sc->sc_hunique = NULL;
mbed_official 0:51ac1d130fd4 863 }
mbed_official 0:51ac1d130fd4 864 sc->sc_hunique_len = 0;
mbed_official 0:51ac1d130fd4 865 #endif
mbed_official 0:51ac1d130fd4 866 sc->sc_session = 0;
mbed_official 0:51ac1d130fd4 867
mbed_official 0:51ac1d130fd4 868 sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
mbed_official 0:51ac1d130fd4 869
mbed_official 0:51ac1d130fd4 870 return err;
mbed_official 0:51ac1d130fd4 871 }
mbed_official 0:51ac1d130fd4 872
mbed_official 0:51ac1d130fd4 873 /* Connection attempt aborted */
mbed_official 0:51ac1d130fd4 874 static void
mbed_official 0:51ac1d130fd4 875 pppoe_abort_connect(struct pppoe_softc *sc)
mbed_official 0:51ac1d130fd4 876 {
mbed_official 0:51ac1d130fd4 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);
mbed_official 0:51ac1d130fd4 878 sc->sc_state = PPPOE_STATE_CLOSING;
mbed_official 0:51ac1d130fd4 879
mbed_official 0:51ac1d130fd4 880 sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
mbed_official 0:51ac1d130fd4 881
mbed_official 0:51ac1d130fd4 882 /* clear connection state */
mbed_official 0:51ac1d130fd4 883 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
mbed_official 0:51ac1d130fd4 884 sc->sc_state = PPPOE_STATE_INITIAL;
mbed_official 0:51ac1d130fd4 885 }
mbed_official 0:51ac1d130fd4 886
mbed_official 0:51ac1d130fd4 887 /* Send a PADR packet */
mbed_official 0:51ac1d130fd4 888 static err_t
mbed_official 0:51ac1d130fd4 889 pppoe_send_padr(struct pppoe_softc *sc)
mbed_official 0:51ac1d130fd4 890 {
mbed_official 0:51ac1d130fd4 891 struct pbuf *pb;
mbed_official 0:51ac1d130fd4 892 u8_t *p;
mbed_official 0:51ac1d130fd4 893 size_t len;
mbed_official 0:51ac1d130fd4 894 #ifdef PPPOE_TODO
mbed_official 0:51ac1d130fd4 895 size_t l1 = 0; /* XXX: gcc */
mbed_official 0:51ac1d130fd4 896 #endif /* PPPOE_TODO */
mbed_official 0:51ac1d130fd4 897
mbed_official 0:51ac1d130fd4 898 if (sc->sc_state != PPPOE_STATE_PADR_SENT) {
mbed_official 0:51ac1d130fd4 899 return ERR_CONN;
mbed_official 0:51ac1d130fd4 900 }
mbed_official 0:51ac1d130fd4 901
mbed_official 0:51ac1d130fd4 902 len = 2 + 2 + 2 + 2 + sizeof(sc); /* service name, host unique */
mbed_official 0:51ac1d130fd4 903 #ifdef PPPOE_TODO
mbed_official 0:51ac1d130fd4 904 if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
mbed_official 0:51ac1d130fd4 905 l1 = strlen(sc->sc_service_name);
mbed_official 0:51ac1d130fd4 906 len += l1;
mbed_official 0:51ac1d130fd4 907 }
mbed_official 0:51ac1d130fd4 908 #endif /* PPPOE_TODO */
mbed_official 0:51ac1d130fd4 909 if (sc->sc_ac_cookie_len > 0) {
mbed_official 0:51ac1d130fd4 910 len += 2 + 2 + sc->sc_ac_cookie_len; /* AC cookie */
mbed_official 0:51ac1d130fd4 911 }
mbed_official 0:51ac1d130fd4 912 LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
mbed_official 0:51ac1d130fd4 913 sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
mbed_official 0:51ac1d130fd4 914 pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
mbed_official 0:51ac1d130fd4 915 if (!pb) {
mbed_official 0:51ac1d130fd4 916 return ERR_MEM;
mbed_official 0:51ac1d130fd4 917 }
mbed_official 0:51ac1d130fd4 918 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
mbed_official 0:51ac1d130fd4 919 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
mbed_official 0:51ac1d130fd4 920 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADR, 0, len);
mbed_official 0:51ac1d130fd4 921 PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
mbed_official 0:51ac1d130fd4 922 #ifdef PPPOE_TODO
mbed_official 0:51ac1d130fd4 923 if (sc->sc_service_name != NULL) {
mbed_official 0:51ac1d130fd4 924 PPPOE_ADD_16(p, l1);
mbed_official 0:51ac1d130fd4 925 MEMCPY(p, sc->sc_service_name, l1);
mbed_official 0:51ac1d130fd4 926 p += l1;
mbed_official 0:51ac1d130fd4 927 } else
mbed_official 0:51ac1d130fd4 928 #endif /* PPPOE_TODO */
mbed_official 0:51ac1d130fd4 929 {
mbed_official 0:51ac1d130fd4 930 PPPOE_ADD_16(p, 0);
mbed_official 0:51ac1d130fd4 931 }
mbed_official 0:51ac1d130fd4 932 if (sc->sc_ac_cookie_len > 0) {
mbed_official 0:51ac1d130fd4 933 PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
mbed_official 0:51ac1d130fd4 934 PPPOE_ADD_16(p, sc->sc_ac_cookie_len);
mbed_official 0:51ac1d130fd4 935 MEMCPY(p, sc->sc_ac_cookie, sc->sc_ac_cookie_len);
mbed_official 0:51ac1d130fd4 936 p += sc->sc_ac_cookie_len;
mbed_official 0:51ac1d130fd4 937 }
mbed_official 0:51ac1d130fd4 938 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
mbed_official 0:51ac1d130fd4 939 PPPOE_ADD_16(p, sizeof(sc));
mbed_official 0:51ac1d130fd4 940 MEMCPY(p, &sc, sizeof sc);
mbed_official 0:51ac1d130fd4 941
mbed_official 0:51ac1d130fd4 942 return pppoe_output(sc, pb);
mbed_official 0:51ac1d130fd4 943 }
mbed_official 0:51ac1d130fd4 944
mbed_official 0:51ac1d130fd4 945 /* send a PADT packet */
mbed_official 0:51ac1d130fd4 946 static err_t
mbed_official 0:51ac1d130fd4 947 pppoe_send_padt(struct netif *outgoing_if, u_int session, const u8_t *dest)
mbed_official 0:51ac1d130fd4 948 {
mbed_official 0:51ac1d130fd4 949 struct pbuf *pb;
mbed_official 0:51ac1d130fd4 950 struct eth_hdr *ethhdr;
mbed_official 0:51ac1d130fd4 951 err_t res;
mbed_official 0:51ac1d130fd4 952 u8_t *p;
mbed_official 0:51ac1d130fd4 953
mbed_official 0:51ac1d130fd4 954 pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN, PBUF_RAM);
mbed_official 0:51ac1d130fd4 955 if (!pb) {
mbed_official 0:51ac1d130fd4 956 return ERR_MEM;
mbed_official 0:51ac1d130fd4 957 }
mbed_official 0:51ac1d130fd4 958 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
mbed_official 0:51ac1d130fd4 959
mbed_official 0:51ac1d130fd4 960 ethhdr = (struct eth_hdr *)pb->payload;
mbed_official 0:51ac1d130fd4 961 ethhdr->type = PP_HTONS(ETHTYPE_PPPOEDISC);
mbed_official 0:51ac1d130fd4 962 MEMCPY(ethhdr->dest.addr, dest, sizeof(ethhdr->dest.addr));
mbed_official 0:51ac1d130fd4 963 MEMCPY(ethhdr->src.addr, ((struct eth_addr *)outgoing_if->hwaddr)->addr, sizeof(ethhdr->src.addr));
mbed_official 0:51ac1d130fd4 964
mbed_official 0:51ac1d130fd4 965 p = (u8_t*)(ethhdr + 1);
mbed_official 0:51ac1d130fd4 966 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADT, session, 0);
mbed_official 0:51ac1d130fd4 967
mbed_official 0:51ac1d130fd4 968 res = outgoing_if->linkoutput(outgoing_if, pb);
mbed_official 0:51ac1d130fd4 969
mbed_official 0:51ac1d130fd4 970 pbuf_free(pb);
mbed_official 0:51ac1d130fd4 971
mbed_official 0:51ac1d130fd4 972 return res;
mbed_official 0:51ac1d130fd4 973 }
mbed_official 0:51ac1d130fd4 974
mbed_official 0:51ac1d130fd4 975 #ifdef PPPOE_SERVER
mbed_official 0:51ac1d130fd4 976 static err_t
mbed_official 0:51ac1d130fd4 977 pppoe_send_pado(struct pppoe_softc *sc)
mbed_official 0:51ac1d130fd4 978 {
mbed_official 0:51ac1d130fd4 979 struct pbuf *pb;
mbed_official 0:51ac1d130fd4 980 u8_t *p;
mbed_official 0:51ac1d130fd4 981 size_t len;
mbed_official 0:51ac1d130fd4 982
mbed_official 0:51ac1d130fd4 983 if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
mbed_official 0:51ac1d130fd4 984 return ERR_CONN;
mbed_official 0:51ac1d130fd4 985 }
mbed_official 0:51ac1d130fd4 986
mbed_official 0:51ac1d130fd4 987 /* calc length */
mbed_official 0:51ac1d130fd4 988 len = 0;
mbed_official 0:51ac1d130fd4 989 /* include ac_cookie */
mbed_official 0:51ac1d130fd4 990 len += 2 + 2 + sizeof(sc);
mbed_official 0:51ac1d130fd4 991 /* include hunique */
mbed_official 0:51ac1d130fd4 992 len += 2 + 2 + sc->sc_hunique_len;
mbed_official 0:51ac1d130fd4 993 pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
mbed_official 0:51ac1d130fd4 994 if (!pb) {
mbed_official 0:51ac1d130fd4 995 return ERR_MEM;
mbed_official 0:51ac1d130fd4 996 }
mbed_official 0:51ac1d130fd4 997 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
mbed_official 0:51ac1d130fd4 998 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
mbed_official 0:51ac1d130fd4 999 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADO, 0, len);
mbed_official 0:51ac1d130fd4 1000 PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
mbed_official 0:51ac1d130fd4 1001 PPPOE_ADD_16(p, sizeof(sc));
mbed_official 0:51ac1d130fd4 1002 MEMCPY(p, &sc, sizeof(sc));
mbed_official 0:51ac1d130fd4 1003 p += sizeof(sc);
mbed_official 0:51ac1d130fd4 1004 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
mbed_official 0:51ac1d130fd4 1005 PPPOE_ADD_16(p, sc->sc_hunique_len);
mbed_official 0:51ac1d130fd4 1006 MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
mbed_official 0:51ac1d130fd4 1007 return pppoe_output(sc, pb);
mbed_official 0:51ac1d130fd4 1008 }
mbed_official 0:51ac1d130fd4 1009
mbed_official 0:51ac1d130fd4 1010 static err_t
mbed_official 0:51ac1d130fd4 1011 pppoe_send_pads(struct pppoe_softc *sc)
mbed_official 0:51ac1d130fd4 1012 {
mbed_official 0:51ac1d130fd4 1013 struct pbuf *pb;
mbed_official 0:51ac1d130fd4 1014 u8_t *p;
mbed_official 0:51ac1d130fd4 1015 size_t len, l1 = 0; /* XXX: gcc */
mbed_official 0:51ac1d130fd4 1016
mbed_official 0:51ac1d130fd4 1017 if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
mbed_official 0:51ac1d130fd4 1018 return ERR_CONN;
mbed_official 0:51ac1d130fd4 1019 }
mbed_official 0:51ac1d130fd4 1020
mbed_official 0:51ac1d130fd4 1021 sc->sc_session = mono_time.tv_sec % 0xff + 1;
mbed_official 0:51ac1d130fd4 1022 /* calc length */
mbed_official 0:51ac1d130fd4 1023 len = 0;
mbed_official 0:51ac1d130fd4 1024 /* include hunique */
mbed_official 0:51ac1d130fd4 1025 len += 2 + 2 + 2 + 2 + sc->sc_hunique_len; /* service name, host unique*/
mbed_official 0:51ac1d130fd4 1026 if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
mbed_official 0:51ac1d130fd4 1027 l1 = strlen(sc->sc_service_name);
mbed_official 0:51ac1d130fd4 1028 len += l1;
mbed_official 0:51ac1d130fd4 1029 }
mbed_official 0:51ac1d130fd4 1030 pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
mbed_official 0:51ac1d130fd4 1031 if (!pb) {
mbed_official 0:51ac1d130fd4 1032 return ERR_MEM;
mbed_official 0:51ac1d130fd4 1033 }
mbed_official 0:51ac1d130fd4 1034 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
mbed_official 0:51ac1d130fd4 1035 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
mbed_official 0:51ac1d130fd4 1036 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADS, sc->sc_session, len);
mbed_official 0:51ac1d130fd4 1037 PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
mbed_official 0:51ac1d130fd4 1038 if (sc->sc_service_name != NULL) {
mbed_official 0:51ac1d130fd4 1039 PPPOE_ADD_16(p, l1);
mbed_official 0:51ac1d130fd4 1040 MEMCPY(p, sc->sc_service_name, l1);
mbed_official 0:51ac1d130fd4 1041 p += l1;
mbed_official 0:51ac1d130fd4 1042 } else {
mbed_official 0:51ac1d130fd4 1043 PPPOE_ADD_16(p, 0);
mbed_official 0:51ac1d130fd4 1044 }
mbed_official 0:51ac1d130fd4 1045 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
mbed_official 0:51ac1d130fd4 1046 PPPOE_ADD_16(p, sc->sc_hunique_len);
mbed_official 0:51ac1d130fd4 1047 MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
mbed_official 0:51ac1d130fd4 1048 return pppoe_output(sc, pb);
mbed_official 0:51ac1d130fd4 1049 }
mbed_official 0:51ac1d130fd4 1050 #endif
mbed_official 0:51ac1d130fd4 1051
mbed_official 0:51ac1d130fd4 1052 err_t
mbed_official 0:51ac1d130fd4 1053 pppoe_xmit(struct pppoe_softc *sc, struct pbuf *pb)
mbed_official 0:51ac1d130fd4 1054 {
mbed_official 0:51ac1d130fd4 1055 u8_t *p;
mbed_official 0:51ac1d130fd4 1056 size_t len;
mbed_official 0:51ac1d130fd4 1057
mbed_official 0:51ac1d130fd4 1058 /* are we ready to process data yet? */
mbed_official 0:51ac1d130fd4 1059 if (sc->sc_state < PPPOE_STATE_SESSION) {
mbed_official 0:51ac1d130fd4 1060 /*sppp_flush(&sc->sc_sppp.pp_if);*/
mbed_official 0:51ac1d130fd4 1061 pbuf_free(pb);
mbed_official 0:51ac1d130fd4 1062 return ERR_CONN;
mbed_official 0:51ac1d130fd4 1063 }
mbed_official 0:51ac1d130fd4 1064
mbed_official 0:51ac1d130fd4 1065 len = pb->tot_len;
mbed_official 0:51ac1d130fd4 1066
mbed_official 0:51ac1d130fd4 1067 /* make room for Ethernet header - should not fail */
mbed_official 0:51ac1d130fd4 1068 if (pbuf_header(pb, sizeof(struct eth_hdr) + PPPOE_HEADERLEN) != 0) {
mbed_official 0:51ac1d130fd4 1069 /* bail out */
mbed_official 0:51ac1d130fd4 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));
mbed_official 0:51ac1d130fd4 1071 LINK_STATS_INC(link.lenerr);
mbed_official 0:51ac1d130fd4 1072 pbuf_free(pb);
mbed_official 0:51ac1d130fd4 1073 return ERR_BUF;
mbed_official 0:51ac1d130fd4 1074 }
mbed_official 0:51ac1d130fd4 1075
mbed_official 0:51ac1d130fd4 1076 p = (u8_t*)pb->payload + sizeof(struct eth_hdr);
mbed_official 0:51ac1d130fd4 1077 PPPOE_ADD_HEADER(p, 0, sc->sc_session, len);
mbed_official 0:51ac1d130fd4 1078
mbed_official 0:51ac1d130fd4 1079 return pppoe_output(sc, pb);
mbed_official 0:51ac1d130fd4 1080 }
mbed_official 0:51ac1d130fd4 1081
mbed_official 0:51ac1d130fd4 1082 #if 0 /*def PFIL_HOOKS*/
mbed_official 0:51ac1d130fd4 1083 static int
mbed_official 0:51ac1d130fd4 1084 pppoe_ifattach_hook(void *arg, struct pbuf **mp, struct netif *ifp, int dir)
mbed_official 0:51ac1d130fd4 1085 {
mbed_official 0:51ac1d130fd4 1086 struct pppoe_softc *sc;
mbed_official 0:51ac1d130fd4 1087 int s;
mbed_official 0:51ac1d130fd4 1088
mbed_official 0:51ac1d130fd4 1089 if (mp != (struct pbuf **)PFIL_IFNET_DETACH) {
mbed_official 0:51ac1d130fd4 1090 return 0;
mbed_official 0:51ac1d130fd4 1091 }
mbed_official 0:51ac1d130fd4 1092
mbed_official 0:51ac1d130fd4 1093 LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
mbed_official 0:51ac1d130fd4 1094 if (sc->sc_ethif != ifp) {
mbed_official 0:51ac1d130fd4 1095 continue;
mbed_official 0:51ac1d130fd4 1096 }
mbed_official 0:51ac1d130fd4 1097 if (sc->sc_sppp.pp_if.if_flags & IFF_UP) {
mbed_official 0:51ac1d130fd4 1098 sc->sc_sppp.pp_if.if_flags &= ~(IFF_UP|IFF_RUNNING);
mbed_official 0:51ac1d130fd4 1099 printf("%c%c%"U16_F": ethernet interface detached, going down\n",
mbed_official 0:51ac1d130fd4 1100 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
mbed_official 0:51ac1d130fd4 1101 }
mbed_official 0:51ac1d130fd4 1102 sc->sc_ethif = NULL;
mbed_official 0:51ac1d130fd4 1103 pppoe_clear_softc(sc, "ethernet interface detached");
mbed_official 0:51ac1d130fd4 1104 }
mbed_official 0:51ac1d130fd4 1105
mbed_official 0:51ac1d130fd4 1106 return 0;
mbed_official 0:51ac1d130fd4 1107 }
mbed_official 0:51ac1d130fd4 1108 #endif
mbed_official 0:51ac1d130fd4 1109
mbed_official 0:51ac1d130fd4 1110 static void
mbed_official 0:51ac1d130fd4 1111 pppoe_clear_softc(struct pppoe_softc *sc, const char *message)
mbed_official 0:51ac1d130fd4 1112 {
mbed_official 0:51ac1d130fd4 1113 LWIP_UNUSED_ARG(message);
mbed_official 0:51ac1d130fd4 1114
mbed_official 0:51ac1d130fd4 1115 /* stop timer */
mbed_official 0:51ac1d130fd4 1116 sys_untimeout(pppoe_timeout, sc);
mbed_official 0:51ac1d130fd4 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));
mbed_official 0:51ac1d130fd4 1118
mbed_official 0:51ac1d130fd4 1119 /* fix our state */
mbed_official 0:51ac1d130fd4 1120 sc->sc_state = PPPOE_STATE_INITIAL;
mbed_official 0:51ac1d130fd4 1121
mbed_official 0:51ac1d130fd4 1122 /* notify upper layers */
mbed_official 0:51ac1d130fd4 1123 sc->sc_linkStatusCB(sc->sc_pd, 0);
mbed_official 0:51ac1d130fd4 1124
mbed_official 0:51ac1d130fd4 1125 /* clean up softc */
mbed_official 0:51ac1d130fd4 1126 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
mbed_official 0:51ac1d130fd4 1127 sc->sc_ac_cookie_len = 0;
mbed_official 0:51ac1d130fd4 1128 sc->sc_session = 0;
mbed_official 0:51ac1d130fd4 1129 }
mbed_official 0:51ac1d130fd4 1130
mbed_official 0:51ac1d130fd4 1131 #endif /* PPPOE_SUPPORT */
mbed_official 0:51ac1d130fd4 1132