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lwip/netif/ppp/ppp_oe.c@0:b2805b6888dc, 2016-06-20 (annotated)

Committer:
robert_jw
Date:
Mon Jun 20 01:40:20 2016 +0000
Revision:
0:b2805b6888dc
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Who changed what in which revision?

UserRevisionLine numberNew contents of line
robert_jw 0:b2805b6888dc 1 /*****************************************************************************
robert_jw 0:b2805b6888dc 2 * ppp_oe.c - PPP Over Ethernet implementation for lwIP.
robert_jw 0:b2805b6888dc 3 *
robert_jw 0:b2805b6888dc 4 * Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc.
robert_jw 0:b2805b6888dc 5 *
robert_jw 0:b2805b6888dc 6 * The authors hereby grant permission to use, copy, modify, distribute,
robert_jw 0:b2805b6888dc 7 * and license this software and its documentation for any purpose, provided
robert_jw 0:b2805b6888dc 8 * that existing copyright notices are retained in all copies and that this
robert_jw 0:b2805b6888dc 9 * notice and the following disclaimer are included verbatim in any
robert_jw 0:b2805b6888dc 10 * distributions. No written agreement, license, or royalty fee is required
robert_jw 0:b2805b6888dc 11 * for any of the authorized uses.
robert_jw 0:b2805b6888dc 12 *
robert_jw 0:b2805b6888dc 13 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
robert_jw 0:b2805b6888dc 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
robert_jw 0:b2805b6888dc 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
robert_jw 0:b2805b6888dc 16 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
robert_jw 0:b2805b6888dc 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
robert_jw 0:b2805b6888dc 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
robert_jw 0:b2805b6888dc 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
robert_jw 0:b2805b6888dc 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
robert_jw 0:b2805b6888dc 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
robert_jw 0:b2805b6888dc 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
robert_jw 0:b2805b6888dc 23 *
robert_jw 0:b2805b6888dc 24 ******************************************************************************
robert_jw 0:b2805b6888dc 25 * REVISION HISTORY
robert_jw 0:b2805b6888dc 26 *
robert_jw 0:b2805b6888dc 27 * 06-01-01 Marc Boucher <marc@mbsi.ca>
robert_jw 0:b2805b6888dc 28 * Ported to lwIP.
robert_jw 0:b2805b6888dc 29 *****************************************************************************/
robert_jw 0:b2805b6888dc 30
robert_jw 0:b2805b6888dc 31
robert_jw 0:b2805b6888dc 32
robert_jw 0:b2805b6888dc 33 /* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */
robert_jw 0:b2805b6888dc 34
robert_jw 0:b2805b6888dc 35 /*-
robert_jw 0:b2805b6888dc 36 * Copyright (c) 2002 The NetBSD Foundation, Inc.
robert_jw 0:b2805b6888dc 37 * All rights reserved.
robert_jw 0:b2805b6888dc 38 *
robert_jw 0:b2805b6888dc 39 * This code is derived from software contributed to The NetBSD Foundation
robert_jw 0:b2805b6888dc 40 * by Martin Husemann <martin@NetBSD.org>.
robert_jw 0:b2805b6888dc 41 *
robert_jw 0:b2805b6888dc 42 * Redistribution and use in source and binary forms, with or without
robert_jw 0:b2805b6888dc 43 * modification, are permitted provided that the following conditions
robert_jw 0:b2805b6888dc 44 * are met:
robert_jw 0:b2805b6888dc 45 * 1. Redistributions of source code must retain the above copyright
robert_jw 0:b2805b6888dc 46 * notice, this list of conditions and the following disclaimer.
robert_jw 0:b2805b6888dc 47 * 2. Redistributions in binary form must reproduce the above copyright
robert_jw 0:b2805b6888dc 48 * notice, this list of conditions and the following disclaimer in the
robert_jw 0:b2805b6888dc 49 * documentation and/or other materials provided with the distribution.
robert_jw 0:b2805b6888dc 50 * 3. All advertising materials mentioning features or use of this software
robert_jw 0:b2805b6888dc 51 * must display the following acknowledgement:
robert_jw 0:b2805b6888dc 52 * This product includes software developed by the NetBSD
robert_jw 0:b2805b6888dc 53 * Foundation, Inc. and its contributors.
robert_jw 0:b2805b6888dc 54 * 4. Neither the name of The NetBSD Foundation nor the names of its
robert_jw 0:b2805b6888dc 55 * contributors may be used to endorse or promote products derived
robert_jw 0:b2805b6888dc 56 * from this software without specific prior written permission.
robert_jw 0:b2805b6888dc 57 *
robert_jw 0:b2805b6888dc 58 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
robert_jw 0:b2805b6888dc 59 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
robert_jw 0:b2805b6888dc 60 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
robert_jw 0:b2805b6888dc 61 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
robert_jw 0:b2805b6888dc 62 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
robert_jw 0:b2805b6888dc 63 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
robert_jw 0:b2805b6888dc 64 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
robert_jw 0:b2805b6888dc 65 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
robert_jw 0:b2805b6888dc 66 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
robert_jw 0:b2805b6888dc 67 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
robert_jw 0:b2805b6888dc 68 * POSSIBILITY OF SUCH DAMAGE.
robert_jw 0:b2805b6888dc 69 */
robert_jw 0:b2805b6888dc 70
robert_jw 0:b2805b6888dc 71 #include "lwip/opt.h"
robert_jw 0:b2805b6888dc 72
robert_jw 0:b2805b6888dc 73 #if PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */
robert_jw 0:b2805b6888dc 74
robert_jw 0:b2805b6888dc 75 #include "netif/ppp_oe.h"
robert_jw 0:b2805b6888dc 76
robert_jw 0:b2805b6888dc 77 #include "ppp.h"
robert_jw 0:b2805b6888dc 78 #include "pppdebug.h"
robert_jw 0:b2805b6888dc 79
robert_jw 0:b2805b6888dc 80 #include "lwip/timers.h"
robert_jw 0:b2805b6888dc 81 #include "lwip/memp.h"
robert_jw 0:b2805b6888dc 82
robert_jw 0:b2805b6888dc 83 #include <string.h>
robert_jw 0:b2805b6888dc 84 #include <stdio.h>
robert_jw 0:b2805b6888dc 85
robert_jw 0:b2805b6888dc 86
robert_jw 0:b2805b6888dc 87 /* Add a 16 bit unsigned value to a buffer pointed to by PTR */
robert_jw 0:b2805b6888dc 88 #define PPPOE_ADD_16(PTR, VAL) \
robert_jw 0:b2805b6888dc 89 *(PTR)++ = (u8_t)((VAL) / 256); \
robert_jw 0:b2805b6888dc 90 *(PTR)++ = (u8_t)((VAL) % 256)
robert_jw 0:b2805b6888dc 91
robert_jw 0:b2805b6888dc 92 /* Add a complete PPPoE header to the buffer pointed to by PTR */
robert_jw 0:b2805b6888dc 93 #define PPPOE_ADD_HEADER(PTR, CODE, SESS, LEN) \
robert_jw 0:b2805b6888dc 94 *(PTR)++ = PPPOE_VERTYPE; \
robert_jw 0:b2805b6888dc 95 *(PTR)++ = (CODE); \
robert_jw 0:b2805b6888dc 96 PPPOE_ADD_16(PTR, SESS); \
robert_jw 0:b2805b6888dc 97 PPPOE_ADD_16(PTR, LEN)
robert_jw 0:b2805b6888dc 98
robert_jw 0:b2805b6888dc 99 #define PPPOE_DISC_TIMEOUT (5*1000) /* base for quick timeout calculation */
robert_jw 0:b2805b6888dc 100 #define PPPOE_SLOW_RETRY (60*1000) /* persistent retry interval */
robert_jw 0:b2805b6888dc 101 #define PPPOE_DISC_MAXPADI 4 /* retry PADI four times (quickly) */
robert_jw 0:b2805b6888dc 102 #define PPPOE_DISC_MAXPADR 2 /* retry PADR twice */
robert_jw 0:b2805b6888dc 103
robert_jw 0:b2805b6888dc 104 #ifdef PPPOE_SERVER
robert_jw 0:b2805b6888dc 105 #error "PPPOE_SERVER is not yet supported under lwIP!"
robert_jw 0:b2805b6888dc 106 /* from if_spppsubr.c */
robert_jw 0:b2805b6888dc 107 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
robert_jw 0:b2805b6888dc 108 #endif
robert_jw 0:b2805b6888dc 109
robert_jw 0:b2805b6888dc 110 #ifndef PPPOE_ERRORSTRING_LEN
robert_jw 0:b2805b6888dc 111 #define PPPOE_ERRORSTRING_LEN 64
robert_jw 0:b2805b6888dc 112 #endif
robert_jw 0:b2805b6888dc 113 static char pppoe_error_tmp[PPPOE_ERRORSTRING_LEN];
robert_jw 0:b2805b6888dc 114
robert_jw 0:b2805b6888dc 115
robert_jw 0:b2805b6888dc 116 /* input routines */
robert_jw 0:b2805b6888dc 117 static void pppoe_dispatch_disc_pkt(struct netif *, struct pbuf *);
robert_jw 0:b2805b6888dc 118
robert_jw 0:b2805b6888dc 119 /* management routines */
robert_jw 0:b2805b6888dc 120 static int pppoe_do_disconnect(struct pppoe_softc *);
robert_jw 0:b2805b6888dc 121 static void pppoe_abort_connect(struct pppoe_softc *);
robert_jw 0:b2805b6888dc 122 static void pppoe_clear_softc(struct pppoe_softc *, const char *);
robert_jw 0:b2805b6888dc 123
robert_jw 0:b2805b6888dc 124 /* internal timeout handling */
robert_jw 0:b2805b6888dc 125 static void pppoe_timeout(void *);
robert_jw 0:b2805b6888dc 126
robert_jw 0:b2805b6888dc 127 /* sending actual protocol controll packets */
robert_jw 0:b2805b6888dc 128 static err_t pppoe_send_padi(struct pppoe_softc *);
robert_jw 0:b2805b6888dc 129 static err_t pppoe_send_padr(struct pppoe_softc *);
robert_jw 0:b2805b6888dc 130 #ifdef PPPOE_SERVER
robert_jw 0:b2805b6888dc 131 static err_t pppoe_send_pado(struct pppoe_softc *);
robert_jw 0:b2805b6888dc 132 static err_t pppoe_send_pads(struct pppoe_softc *);
robert_jw 0:b2805b6888dc 133 #endif
robert_jw 0:b2805b6888dc 134 static err_t pppoe_send_padt(struct netif *, u_int, const u8_t *);
robert_jw 0:b2805b6888dc 135
robert_jw 0:b2805b6888dc 136 /* internal helper functions */
robert_jw 0:b2805b6888dc 137 static struct pppoe_softc * pppoe_find_softc_by_session(u_int, struct netif *);
robert_jw 0:b2805b6888dc 138 static struct pppoe_softc * pppoe_find_softc_by_hunique(u8_t *, size_t, struct netif *);
robert_jw 0:b2805b6888dc 139
robert_jw 0:b2805b6888dc 140 /** linked list of created pppoe interfaces */
robert_jw 0:b2805b6888dc 141 static struct pppoe_softc *pppoe_softc_list;
robert_jw 0:b2805b6888dc 142
robert_jw 0:b2805b6888dc 143 err_t
robert_jw 0:b2805b6888dc 144 pppoe_create(struct netif *ethif, int pd, void (*linkStatusCB)(int pd, int up), struct pppoe_softc **scptr)
robert_jw 0:b2805b6888dc 145 {
robert_jw 0:b2805b6888dc 146 struct pppoe_softc *sc;
robert_jw 0:b2805b6888dc 147
robert_jw 0:b2805b6888dc 148 sc = (struct pppoe_softc *)memp_malloc(MEMP_PPPOE_IF);
robert_jw 0:b2805b6888dc 149 if (sc == NULL) {
robert_jw 0:b2805b6888dc 150 *scptr = NULL;
robert_jw 0:b2805b6888dc 151 return ERR_MEM;
robert_jw 0:b2805b6888dc 152 }
robert_jw 0:b2805b6888dc 153 memset(sc, 0, sizeof(struct pppoe_softc));
robert_jw 0:b2805b6888dc 154
robert_jw 0:b2805b6888dc 155 /* changed to real address later */
robert_jw 0:b2805b6888dc 156 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
robert_jw 0:b2805b6888dc 157
robert_jw 0:b2805b6888dc 158 sc->sc_pd = pd;
robert_jw 0:b2805b6888dc 159 sc->sc_linkStatusCB = linkStatusCB;
robert_jw 0:b2805b6888dc 160 sc->sc_ethif = ethif;
robert_jw 0:b2805b6888dc 161
robert_jw 0:b2805b6888dc 162 /* put the new interface at the head of the list */
robert_jw 0:b2805b6888dc 163 sc->next = pppoe_softc_list;
robert_jw 0:b2805b6888dc 164 pppoe_softc_list = sc;
robert_jw 0:b2805b6888dc 165
robert_jw 0:b2805b6888dc 166 *scptr = sc;
robert_jw 0:b2805b6888dc 167
robert_jw 0:b2805b6888dc 168 return ERR_OK;
robert_jw 0:b2805b6888dc 169 }
robert_jw 0:b2805b6888dc 170
robert_jw 0:b2805b6888dc 171 err_t
robert_jw 0:b2805b6888dc 172 pppoe_destroy(struct netif *ifp)
robert_jw 0:b2805b6888dc 173 {
robert_jw 0:b2805b6888dc 174 struct pppoe_softc *sc, *prev = NULL;
robert_jw 0:b2805b6888dc 175
robert_jw 0:b2805b6888dc 176 for (sc = pppoe_softc_list; sc != NULL; prev = sc, sc = sc->next) {
robert_jw 0:b2805b6888dc 177 if (sc->sc_ethif == ifp) {
robert_jw 0:b2805b6888dc 178 break;
robert_jw 0:b2805b6888dc 179 }
robert_jw 0:b2805b6888dc 180 }
robert_jw 0:b2805b6888dc 181
robert_jw 0:b2805b6888dc 182 if(!(sc && (sc->sc_ethif == ifp))) {
robert_jw 0:b2805b6888dc 183 return ERR_IF;
robert_jw 0:b2805b6888dc 184 }
robert_jw 0:b2805b6888dc 185
robert_jw 0:b2805b6888dc 186 sys_untimeout(pppoe_timeout, sc);
robert_jw 0:b2805b6888dc 187 if (prev == NULL) {
robert_jw 0:b2805b6888dc 188 /* remove sc from the head of the list */
robert_jw 0:b2805b6888dc 189 pppoe_softc_list = sc->next;
robert_jw 0:b2805b6888dc 190 } else {
robert_jw 0:b2805b6888dc 191 /* remove sc from the list */
robert_jw 0:b2805b6888dc 192 prev->next = sc->next;
robert_jw 0:b2805b6888dc 193 }
robert_jw 0:b2805b6888dc 194
robert_jw 0:b2805b6888dc 195 #ifdef PPPOE_TODO
robert_jw 0:b2805b6888dc 196 if (sc->sc_concentrator_name) {
robert_jw 0:b2805b6888dc 197 mem_free(sc->sc_concentrator_name);
robert_jw 0:b2805b6888dc 198 }
robert_jw 0:b2805b6888dc 199 if (sc->sc_service_name) {
robert_jw 0:b2805b6888dc 200 mem_free(sc->sc_service_name);
robert_jw 0:b2805b6888dc 201 }
robert_jw 0:b2805b6888dc 202 #endif /* PPPOE_TODO */
robert_jw 0:b2805b6888dc 203 memp_free(MEMP_PPPOE_IF, sc);
robert_jw 0:b2805b6888dc 204
robert_jw 0:b2805b6888dc 205 return ERR_OK;
robert_jw 0:b2805b6888dc 206 }
robert_jw 0:b2805b6888dc 207
robert_jw 0:b2805b6888dc 208 /*
robert_jw 0:b2805b6888dc 209 * Find the interface handling the specified session.
robert_jw 0:b2805b6888dc 210 * Note: O(number of sessions open), this is a client-side only, mean
robert_jw 0:b2805b6888dc 211 * and lean implementation, so number of open sessions typically should
robert_jw 0:b2805b6888dc 212 * be 1.
robert_jw 0:b2805b6888dc 213 */
robert_jw 0:b2805b6888dc 214 static struct pppoe_softc *
robert_jw 0:b2805b6888dc 215 pppoe_find_softc_by_session(u_int session, struct netif *rcvif)
robert_jw 0:b2805b6888dc 216 {
robert_jw 0:b2805b6888dc 217 struct pppoe_softc *sc;
robert_jw 0:b2805b6888dc 218
robert_jw 0:b2805b6888dc 219 if (session == 0) {
robert_jw 0:b2805b6888dc 220 return NULL;
robert_jw 0:b2805b6888dc 221 }
robert_jw 0:b2805b6888dc 222
robert_jw 0:b2805b6888dc 223 for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
robert_jw 0:b2805b6888dc 224 if (sc->sc_state == PPPOE_STATE_SESSION
robert_jw 0:b2805b6888dc 225 && sc->sc_session == session) {
robert_jw 0:b2805b6888dc 226 if (sc->sc_ethif == rcvif) {
robert_jw 0:b2805b6888dc 227 return sc;
robert_jw 0:b2805b6888dc 228 } else {
robert_jw 0:b2805b6888dc 229 return NULL;
robert_jw 0:b2805b6888dc 230 }
robert_jw 0:b2805b6888dc 231 }
robert_jw 0:b2805b6888dc 232 }
robert_jw 0:b2805b6888dc 233 return NULL;
robert_jw 0:b2805b6888dc 234 }
robert_jw 0:b2805b6888dc 235
robert_jw 0:b2805b6888dc 236 /* Check host unique token passed and return appropriate softc pointer,
robert_jw 0:b2805b6888dc 237 * or NULL if token is bogus. */
robert_jw 0:b2805b6888dc 238 static struct pppoe_softc *
robert_jw 0:b2805b6888dc 239 pppoe_find_softc_by_hunique(u8_t *token, size_t len, struct netif *rcvif)
robert_jw 0:b2805b6888dc 240 {
robert_jw 0:b2805b6888dc 241 struct pppoe_softc *sc, *t;
robert_jw 0:b2805b6888dc 242
robert_jw 0:b2805b6888dc 243 if (pppoe_softc_list == NULL) {
robert_jw 0:b2805b6888dc 244 return NULL;
robert_jw 0:b2805b6888dc 245 }
robert_jw 0:b2805b6888dc 246
robert_jw 0:b2805b6888dc 247 if (len != sizeof sc) {
robert_jw 0:b2805b6888dc 248 return NULL;
robert_jw 0:b2805b6888dc 249 }
robert_jw 0:b2805b6888dc 250 MEMCPY(&t, token, len);
robert_jw 0:b2805b6888dc 251
robert_jw 0:b2805b6888dc 252 for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
robert_jw 0:b2805b6888dc 253 if (sc == t) {
robert_jw 0:b2805b6888dc 254 break;
robert_jw 0:b2805b6888dc 255 }
robert_jw 0:b2805b6888dc 256 }
robert_jw 0:b2805b6888dc 257
robert_jw 0:b2805b6888dc 258 if (sc == NULL) {
robert_jw 0:b2805b6888dc 259 PPPDEBUG(LOG_DEBUG, ("pppoe: alien host unique tag, no session found\n"));
robert_jw 0:b2805b6888dc 260 return NULL;
robert_jw 0:b2805b6888dc 261 }
robert_jw 0:b2805b6888dc 262
robert_jw 0:b2805b6888dc 263 /* should be safe to access *sc now */
robert_jw 0:b2805b6888dc 264 if (sc->sc_state < PPPOE_STATE_PADI_SENT || sc->sc_state >= PPPOE_STATE_SESSION) {
robert_jw 0:b2805b6888dc 265 printf("%c%c%"U16_F": host unique tag found, but it belongs to a connection in state %d\n",
robert_jw 0:b2805b6888dc 266 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_state);
robert_jw 0:b2805b6888dc 267 return NULL;
robert_jw 0:b2805b6888dc 268 }
robert_jw 0:b2805b6888dc 269 if (sc->sc_ethif != rcvif) {
robert_jw 0:b2805b6888dc 270 printf("%c%c%"U16_F": wrong interface, not accepting host unique\n",
robert_jw 0:b2805b6888dc 271 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
robert_jw 0:b2805b6888dc 272 return NULL;
robert_jw 0:b2805b6888dc 273 }
robert_jw 0:b2805b6888dc 274 return sc;
robert_jw 0:b2805b6888dc 275 }
robert_jw 0:b2805b6888dc 276
robert_jw 0:b2805b6888dc 277 static void
robert_jw 0:b2805b6888dc 278 pppoe_linkstatus_up(struct pppoe_softc *sc)
robert_jw 0:b2805b6888dc 279 {
robert_jw 0:b2805b6888dc 280 sc->sc_linkStatusCB(sc->sc_pd, 1);
robert_jw 0:b2805b6888dc 281 }
robert_jw 0:b2805b6888dc 282
robert_jw 0:b2805b6888dc 283 /* analyze and handle a single received packet while not in session state */
robert_jw 0:b2805b6888dc 284 static void
robert_jw 0:b2805b6888dc 285 pppoe_dispatch_disc_pkt(struct netif *netif, struct pbuf *pb)
robert_jw 0:b2805b6888dc 286 {
robert_jw 0:b2805b6888dc 287 u16_t tag, len;
robert_jw 0:b2805b6888dc 288 u16_t session, plen;
robert_jw 0:b2805b6888dc 289 struct pppoe_softc *sc;
robert_jw 0:b2805b6888dc 290 const char *err_msg;
robert_jw 0:b2805b6888dc 291 char devname[6];
robert_jw 0:b2805b6888dc 292 u8_t *ac_cookie;
robert_jw 0:b2805b6888dc 293 u16_t ac_cookie_len;
robert_jw 0:b2805b6888dc 294 #ifdef PPPOE_SERVER
robert_jw 0:b2805b6888dc 295 u8_t *hunique;
robert_jw 0:b2805b6888dc 296 size_t hunique_len;
robert_jw 0:b2805b6888dc 297 #endif
robert_jw 0:b2805b6888dc 298 struct pppoehdr *ph;
robert_jw 0:b2805b6888dc 299 struct pppoetag pt;
robert_jw 0:b2805b6888dc 300 int off, err, errortag;
robert_jw 0:b2805b6888dc 301 struct eth_hdr *ethhdr;
robert_jw 0:b2805b6888dc 302
robert_jw 0:b2805b6888dc 303 pb = pppSingleBuf(pb);
robert_jw 0:b2805b6888dc 304
robert_jw 0:b2805b6888dc 305 strcpy(devname, "pppoe"); /* as long as we don't know which instance */
robert_jw 0:b2805b6888dc 306 err_msg = NULL;
robert_jw 0:b2805b6888dc 307 errortag = 0;
robert_jw 0:b2805b6888dc 308 if (pb->len < sizeof(*ethhdr)) {
robert_jw 0:b2805b6888dc 309 goto done;
robert_jw 0:b2805b6888dc 310 }
robert_jw 0:b2805b6888dc 311 ethhdr = (struct eth_hdr *)pb->payload;
robert_jw 0:b2805b6888dc 312 off = sizeof(*ethhdr);
robert_jw 0:b2805b6888dc 313
robert_jw 0:b2805b6888dc 314 ac_cookie = NULL;
robert_jw 0:b2805b6888dc 315 ac_cookie_len = 0;
robert_jw 0:b2805b6888dc 316 #ifdef PPPOE_SERVER
robert_jw 0:b2805b6888dc 317 hunique = NULL;
robert_jw 0:b2805b6888dc 318 hunique_len = 0;
robert_jw 0:b2805b6888dc 319 #endif
robert_jw 0:b2805b6888dc 320 session = 0;
robert_jw 0:b2805b6888dc 321 if (pb->len - off < PPPOE_HEADERLEN) {
robert_jw 0:b2805b6888dc 322 printf("pppoe: packet too short: %d\n", pb->len);
robert_jw 0:b2805b6888dc 323 goto done;
robert_jw 0:b2805b6888dc 324 }
robert_jw 0:b2805b6888dc 325
robert_jw 0:b2805b6888dc 326 ph = (struct pppoehdr *) (ethhdr + 1);
robert_jw 0:b2805b6888dc 327 if (ph->vertype != PPPOE_VERTYPE) {
robert_jw 0:b2805b6888dc 328 printf("pppoe: unknown version/type packet: 0x%x\n", ph->vertype);
robert_jw 0:b2805b6888dc 329 goto done;
robert_jw 0:b2805b6888dc 330 }
robert_jw 0:b2805b6888dc 331 session = ntohs(ph->session);
robert_jw 0:b2805b6888dc 332 plen = ntohs(ph->plen);
robert_jw 0:b2805b6888dc 333 off += sizeof(*ph);
robert_jw 0:b2805b6888dc 334
robert_jw 0:b2805b6888dc 335 if (plen + off > pb->len) {
robert_jw 0:b2805b6888dc 336 printf("pppoe: packet content does not fit: data available = %d, packet size = %u\n",
robert_jw 0:b2805b6888dc 337 pb->len - off, plen);
robert_jw 0:b2805b6888dc 338 goto done;
robert_jw 0:b2805b6888dc 339 }
robert_jw 0:b2805b6888dc 340 if(pb->tot_len == pb->len) {
robert_jw 0:b2805b6888dc 341 pb->tot_len = pb->len = (u16_t)off + plen; /* ignore trailing garbage */
robert_jw 0:b2805b6888dc 342 }
robert_jw 0:b2805b6888dc 343 tag = 0;
robert_jw 0:b2805b6888dc 344 len = 0;
robert_jw 0:b2805b6888dc 345 sc = NULL;
robert_jw 0:b2805b6888dc 346 while (off + sizeof(pt) <= pb->len) {
robert_jw 0:b2805b6888dc 347 MEMCPY(&pt, (u8_t*)pb->payload + off, sizeof(pt));
robert_jw 0:b2805b6888dc 348 tag = ntohs(pt.tag);
robert_jw 0:b2805b6888dc 349 len = ntohs(pt.len);
robert_jw 0:b2805b6888dc 350 if (off + sizeof(pt) + len > pb->len) {
robert_jw 0:b2805b6888dc 351 printf("pppoe: tag 0x%x len 0x%x is too long\n", tag, len);
robert_jw 0:b2805b6888dc 352 goto done;
robert_jw 0:b2805b6888dc 353 }
robert_jw 0:b2805b6888dc 354 switch (tag) {
robert_jw 0:b2805b6888dc 355 case PPPOE_TAG_EOL:
robert_jw 0:b2805b6888dc 356 goto breakbreak;
robert_jw 0:b2805b6888dc 357 case PPPOE_TAG_SNAME:
robert_jw 0:b2805b6888dc 358 break; /* ignored */
robert_jw 0:b2805b6888dc 359 case PPPOE_TAG_ACNAME:
robert_jw 0:b2805b6888dc 360 break; /* ignored */
robert_jw 0:b2805b6888dc 361 case PPPOE_TAG_HUNIQUE:
robert_jw 0:b2805b6888dc 362 if (sc != NULL) {
robert_jw 0:b2805b6888dc 363 break;
robert_jw 0:b2805b6888dc 364 }
robert_jw 0:b2805b6888dc 365 #ifdef PPPOE_SERVER
robert_jw 0:b2805b6888dc 366 hunique = (u8_t*)pb->payload + off + sizeof(pt);
robert_jw 0:b2805b6888dc 367 hunique_len = len;
robert_jw 0:b2805b6888dc 368 #endif
robert_jw 0:b2805b6888dc 369 sc = pppoe_find_softc_by_hunique((u8_t*)pb->payload + off + sizeof(pt), len, netif);
robert_jw 0:b2805b6888dc 370 if (sc != NULL) {
robert_jw 0:b2805b6888dc 371 snprintf(devname, sizeof(devname), "%c%c%"U16_F, sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
robert_jw 0:b2805b6888dc 372 }
robert_jw 0:b2805b6888dc 373 break;
robert_jw 0:b2805b6888dc 374 case PPPOE_TAG_ACCOOKIE:
robert_jw 0:b2805b6888dc 375 if (ac_cookie == NULL) {
robert_jw 0:b2805b6888dc 376 ac_cookie = (u8_t*)pb->payload + off + sizeof(pt);
robert_jw 0:b2805b6888dc 377 ac_cookie_len = len;
robert_jw 0:b2805b6888dc 378 }
robert_jw 0:b2805b6888dc 379 break;
robert_jw 0:b2805b6888dc 380 case PPPOE_TAG_SNAME_ERR:
robert_jw 0:b2805b6888dc 381 err_msg = "SERVICE NAME ERROR";
robert_jw 0:b2805b6888dc 382 errortag = 1;
robert_jw 0:b2805b6888dc 383 break;
robert_jw 0:b2805b6888dc 384 case PPPOE_TAG_ACSYS_ERR:
robert_jw 0:b2805b6888dc 385 err_msg = "AC SYSTEM ERROR";
robert_jw 0:b2805b6888dc 386 errortag = 1;
robert_jw 0:b2805b6888dc 387 break;
robert_jw 0:b2805b6888dc 388 case PPPOE_TAG_GENERIC_ERR:
robert_jw 0:b2805b6888dc 389 err_msg = "GENERIC ERROR";
robert_jw 0:b2805b6888dc 390 errortag = 1;
robert_jw 0:b2805b6888dc 391 break;
robert_jw 0:b2805b6888dc 392 }
robert_jw 0:b2805b6888dc 393 if (err_msg) {
robert_jw 0:b2805b6888dc 394 if (errortag && len) {
robert_jw 0:b2805b6888dc 395 u16_t error_len = LWIP_MIN(len, sizeof(pppoe_error_tmp)-1);
robert_jw 0:b2805b6888dc 396 strncpy(pppoe_error_tmp, (char*)pb->payload + off + sizeof(pt), error_len);
robert_jw 0:b2805b6888dc 397 pppoe_error_tmp[error_len-1] = '\0';
robert_jw 0:b2805b6888dc 398 printf("%s: %s: %s\n", devname, err_msg, pppoe_error_tmp);
robert_jw 0:b2805b6888dc 399 } else {
robert_jw 0:b2805b6888dc 400 printf("%s: %s\n", devname, err_msg);
robert_jw 0:b2805b6888dc 401 }
robert_jw 0:b2805b6888dc 402 if (errortag) {
robert_jw 0:b2805b6888dc 403 goto done;
robert_jw 0:b2805b6888dc 404 }
robert_jw 0:b2805b6888dc 405 }
robert_jw 0:b2805b6888dc 406 off += sizeof(pt) + len;
robert_jw 0:b2805b6888dc 407 }
robert_jw 0:b2805b6888dc 408
robert_jw 0:b2805b6888dc 409 breakbreak:;
robert_jw 0:b2805b6888dc 410 switch (ph->code) {
robert_jw 0:b2805b6888dc 411 case PPPOE_CODE_PADI:
robert_jw 0:b2805b6888dc 412 #ifdef PPPOE_SERVER
robert_jw 0:b2805b6888dc 413 /*
robert_jw 0:b2805b6888dc 414 * got service name, concentrator name, and/or host unique.
robert_jw 0:b2805b6888dc 415 * ignore if we have no interfaces with IFF_PASSIVE|IFF_UP.
robert_jw 0:b2805b6888dc 416 */
robert_jw 0:b2805b6888dc 417 if (LIST_EMPTY(&pppoe_softc_list)) {
robert_jw 0:b2805b6888dc 418 goto done;
robert_jw 0:b2805b6888dc 419 }
robert_jw 0:b2805b6888dc 420 LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
robert_jw 0:b2805b6888dc 421 if (!(sc->sc_sppp.pp_if.if_flags & IFF_UP)) {
robert_jw 0:b2805b6888dc 422 continue;
robert_jw 0:b2805b6888dc 423 }
robert_jw 0:b2805b6888dc 424 if (!(sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
robert_jw 0:b2805b6888dc 425 continue;
robert_jw 0:b2805b6888dc 426 }
robert_jw 0:b2805b6888dc 427 if (sc->sc_state == PPPOE_STATE_INITIAL) {
robert_jw 0:b2805b6888dc 428 break;
robert_jw 0:b2805b6888dc 429 }
robert_jw 0:b2805b6888dc 430 }
robert_jw 0:b2805b6888dc 431 if (sc == NULL) {
robert_jw 0:b2805b6888dc 432 /* printf("pppoe: free passive interface is not found\n"); */
robert_jw 0:b2805b6888dc 433 goto done;
robert_jw 0:b2805b6888dc 434 }
robert_jw 0:b2805b6888dc 435 if (hunique) {
robert_jw 0:b2805b6888dc 436 if (sc->sc_hunique) {
robert_jw 0:b2805b6888dc 437 mem_free(sc->sc_hunique);
robert_jw 0:b2805b6888dc 438 }
robert_jw 0:b2805b6888dc 439 sc->sc_hunique = mem_malloc(hunique_len);
robert_jw 0:b2805b6888dc 440 if (sc->sc_hunique == NULL) {
robert_jw 0:b2805b6888dc 441 goto done;
robert_jw 0:b2805b6888dc 442 }
robert_jw 0:b2805b6888dc 443 sc->sc_hunique_len = hunique_len;
robert_jw 0:b2805b6888dc 444 MEMCPY(sc->sc_hunique, hunique, hunique_len);
robert_jw 0:b2805b6888dc 445 }
robert_jw 0:b2805b6888dc 446 MEMCPY(&sc->sc_dest, eh->ether_shost, sizeof sc->sc_dest);
robert_jw 0:b2805b6888dc 447 sc->sc_state = PPPOE_STATE_PADO_SENT;
robert_jw 0:b2805b6888dc 448 pppoe_send_pado(sc);
robert_jw 0:b2805b6888dc 449 break;
robert_jw 0:b2805b6888dc 450 #endif /* PPPOE_SERVER */
robert_jw 0:b2805b6888dc 451 case PPPOE_CODE_PADR:
robert_jw 0:b2805b6888dc 452 #ifdef PPPOE_SERVER
robert_jw 0:b2805b6888dc 453 /*
robert_jw 0:b2805b6888dc 454 * get sc from ac_cookie if IFF_PASSIVE
robert_jw 0:b2805b6888dc 455 */
robert_jw 0:b2805b6888dc 456 if (ac_cookie == NULL) {
robert_jw 0:b2805b6888dc 457 /* be quiet if there is not a single pppoe instance */
robert_jw 0:b2805b6888dc 458 printf("pppoe: received PADR but not includes ac_cookie\n");
robert_jw 0:b2805b6888dc 459 goto done;
robert_jw 0:b2805b6888dc 460 }
robert_jw 0:b2805b6888dc 461 sc = pppoe_find_softc_by_hunique(ac_cookie, ac_cookie_len, netif);
robert_jw 0:b2805b6888dc 462 if (sc == NULL) {
robert_jw 0:b2805b6888dc 463 /* be quiet if there is not a single pppoe instance */
robert_jw 0:b2805b6888dc 464 if (!LIST_EMPTY(&pppoe_softc_list)) {
robert_jw 0:b2805b6888dc 465 printf("pppoe: received PADR but could not find request for it\n");
robert_jw 0:b2805b6888dc 466 }
robert_jw 0:b2805b6888dc 467 goto done;
robert_jw 0:b2805b6888dc 468 }
robert_jw 0:b2805b6888dc 469 if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
robert_jw 0:b2805b6888dc 470 printf("%c%c%"U16_F": received unexpected PADR\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
robert_jw 0:b2805b6888dc 471 goto done;
robert_jw 0:b2805b6888dc 472 }
robert_jw 0:b2805b6888dc 473 if (hunique) {
robert_jw 0:b2805b6888dc 474 if (sc->sc_hunique) {
robert_jw 0:b2805b6888dc 475 mem_free(sc->sc_hunique);
robert_jw 0:b2805b6888dc 476 }
robert_jw 0:b2805b6888dc 477 sc->sc_hunique = mem_malloc(hunique_len);
robert_jw 0:b2805b6888dc 478 if (sc->sc_hunique == NULL) {
robert_jw 0:b2805b6888dc 479 goto done;
robert_jw 0:b2805b6888dc 480 }
robert_jw 0:b2805b6888dc 481 sc->sc_hunique_len = hunique_len;
robert_jw 0:b2805b6888dc 482 MEMCPY(sc->sc_hunique, hunique, hunique_len);
robert_jw 0:b2805b6888dc 483 }
robert_jw 0:b2805b6888dc 484 pppoe_send_pads(sc);
robert_jw 0:b2805b6888dc 485 sc->sc_state = PPPOE_STATE_SESSION;
robert_jw 0:b2805b6888dc 486 pppoe_linkstatus_up(sc); /* notify upper layers */
robert_jw 0:b2805b6888dc 487 break;
robert_jw 0:b2805b6888dc 488 #else
robert_jw 0:b2805b6888dc 489 /* ignore, we are no access concentrator */
robert_jw 0:b2805b6888dc 490 goto done;
robert_jw 0:b2805b6888dc 491 #endif /* PPPOE_SERVER */
robert_jw 0:b2805b6888dc 492 case PPPOE_CODE_PADO:
robert_jw 0:b2805b6888dc 493 if (sc == NULL) {
robert_jw 0:b2805b6888dc 494 /* be quiet if there is not a single pppoe instance */
robert_jw 0:b2805b6888dc 495 if (pppoe_softc_list != NULL) {
robert_jw 0:b2805b6888dc 496 printf("pppoe: received PADO but could not find request for it\n");
robert_jw 0:b2805b6888dc 497 }
robert_jw 0:b2805b6888dc 498 goto done;
robert_jw 0:b2805b6888dc 499 }
robert_jw 0:b2805b6888dc 500 if (sc->sc_state != PPPOE_STATE_PADI_SENT) {
robert_jw 0:b2805b6888dc 501 printf("%c%c%"U16_F": received unexpected PADO\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
robert_jw 0:b2805b6888dc 502 goto done;
robert_jw 0:b2805b6888dc 503 }
robert_jw 0:b2805b6888dc 504 if (ac_cookie) {
robert_jw 0:b2805b6888dc 505 sc->sc_ac_cookie_len = ac_cookie_len;
robert_jw 0:b2805b6888dc 506 MEMCPY(sc->sc_ac_cookie, ac_cookie, ac_cookie_len);
robert_jw 0:b2805b6888dc 507 }
robert_jw 0:b2805b6888dc 508 MEMCPY(&sc->sc_dest, ethhdr->src.addr, sizeof(sc->sc_dest.addr));
robert_jw 0:b2805b6888dc 509 sys_untimeout(pppoe_timeout, sc);
robert_jw 0:b2805b6888dc 510 sc->sc_padr_retried = 0;
robert_jw 0:b2805b6888dc 511 sc->sc_state = PPPOE_STATE_PADR_SENT;
robert_jw 0:b2805b6888dc 512 if ((err = pppoe_send_padr(sc)) != 0) {
robert_jw 0:b2805b6888dc 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));
robert_jw 0:b2805b6888dc 514 }
robert_jw 0:b2805b6888dc 515 sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
robert_jw 0:b2805b6888dc 516 break;
robert_jw 0:b2805b6888dc 517 case PPPOE_CODE_PADS:
robert_jw 0:b2805b6888dc 518 if (sc == NULL) {
robert_jw 0:b2805b6888dc 519 goto done;
robert_jw 0:b2805b6888dc 520 }
robert_jw 0:b2805b6888dc 521 sc->sc_session = session;
robert_jw 0:b2805b6888dc 522 sys_untimeout(pppoe_timeout, sc);
robert_jw 0:b2805b6888dc 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));
robert_jw 0:b2805b6888dc 524 sc->sc_state = PPPOE_STATE_SESSION;
robert_jw 0:b2805b6888dc 525 pppoe_linkstatus_up(sc); /* notify upper layers */
robert_jw 0:b2805b6888dc 526 break;
robert_jw 0:b2805b6888dc 527 case PPPOE_CODE_PADT:
robert_jw 0:b2805b6888dc 528 if (sc == NULL) {
robert_jw 0:b2805b6888dc 529 goto done;
robert_jw 0:b2805b6888dc 530 }
robert_jw 0:b2805b6888dc 531 pppoe_clear_softc(sc, "received PADT");
robert_jw 0:b2805b6888dc 532 break;
robert_jw 0:b2805b6888dc 533 default:
robert_jw 0:b2805b6888dc 534 if(sc) {
robert_jw 0:b2805b6888dc 535 printf("%c%c%"U16_F": unknown code (0x%"X16_F") session = 0x%"X16_F"\n",
robert_jw 0:b2805b6888dc 536 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
robert_jw 0:b2805b6888dc 537 (u16_t)ph->code, session);
robert_jw 0:b2805b6888dc 538 } else {
robert_jw 0:b2805b6888dc 539 printf("pppoe: unknown code (0x%"X16_F") session = 0x%"X16_F"\n", (u16_t)ph->code, session);
robert_jw 0:b2805b6888dc 540 }
robert_jw 0:b2805b6888dc 541 break;
robert_jw 0:b2805b6888dc 542 }
robert_jw 0:b2805b6888dc 543
robert_jw 0:b2805b6888dc 544 done:
robert_jw 0:b2805b6888dc 545 pbuf_free(pb);
robert_jw 0:b2805b6888dc 546 return;
robert_jw 0:b2805b6888dc 547 }
robert_jw 0:b2805b6888dc 548
robert_jw 0:b2805b6888dc 549 void
robert_jw 0:b2805b6888dc 550 pppoe_disc_input(struct netif *netif, struct pbuf *p)
robert_jw 0:b2805b6888dc 551 {
robert_jw 0:b2805b6888dc 552 /* avoid error messages if there is not a single pppoe instance */
robert_jw 0:b2805b6888dc 553 if (pppoe_softc_list != NULL) {
robert_jw 0:b2805b6888dc 554 pppoe_dispatch_disc_pkt(netif, p);
robert_jw 0:b2805b6888dc 555 } else {
robert_jw 0:b2805b6888dc 556 pbuf_free(p);
robert_jw 0:b2805b6888dc 557 }
robert_jw 0:b2805b6888dc 558 }
robert_jw 0:b2805b6888dc 559
robert_jw 0:b2805b6888dc 560 void
robert_jw 0:b2805b6888dc 561 pppoe_data_input(struct netif *netif, struct pbuf *pb)
robert_jw 0:b2805b6888dc 562 {
robert_jw 0:b2805b6888dc 563 u16_t session, plen;
robert_jw 0:b2805b6888dc 564 struct pppoe_softc *sc;
robert_jw 0:b2805b6888dc 565 struct pppoehdr *ph;
robert_jw 0:b2805b6888dc 566 #ifdef PPPOE_TERM_UNKNOWN_SESSIONS
robert_jw 0:b2805b6888dc 567 u8_t shost[ETHER_ADDR_LEN];
robert_jw 0:b2805b6888dc 568 #endif
robert_jw 0:b2805b6888dc 569
robert_jw 0:b2805b6888dc 570 #ifdef PPPOE_TERM_UNKNOWN_SESSIONS
robert_jw 0:b2805b6888dc 571 MEMCPY(shost, ((struct eth_hdr *)pb->payload)->src.addr, sizeof(shost));
robert_jw 0:b2805b6888dc 572 #endif
robert_jw 0:b2805b6888dc 573 if (pbuf_header(pb, -(int)sizeof(struct eth_hdr)) != 0) {
robert_jw 0:b2805b6888dc 574 /* bail out */
robert_jw 0:b2805b6888dc 575 PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header failed\n"));
robert_jw 0:b2805b6888dc 576 LINK_STATS_INC(link.lenerr);
robert_jw 0:b2805b6888dc 577 goto drop;
robert_jw 0:b2805b6888dc 578 }
robert_jw 0:b2805b6888dc 579
robert_jw 0:b2805b6888dc 580 pb = pppSingleBuf (pb);
robert_jw 0:b2805b6888dc 581
robert_jw 0:b2805b6888dc 582 if (pb->len <= PPPOE_HEADERLEN) {
robert_jw 0:b2805b6888dc 583 printf("pppoe (data): dropping too short packet: %d bytes\n", pb->len);
robert_jw 0:b2805b6888dc 584 goto drop;
robert_jw 0:b2805b6888dc 585 }
robert_jw 0:b2805b6888dc 586
robert_jw 0:b2805b6888dc 587 if (pb->len < sizeof(*ph)) {
robert_jw 0:b2805b6888dc 588 printf("pppoe_data_input: could not get PPPoE header\n");
robert_jw 0:b2805b6888dc 589 goto drop;
robert_jw 0:b2805b6888dc 590 }
robert_jw 0:b2805b6888dc 591 ph = (struct pppoehdr *)pb->payload;
robert_jw 0:b2805b6888dc 592
robert_jw 0:b2805b6888dc 593 if (ph->vertype != PPPOE_VERTYPE) {
robert_jw 0:b2805b6888dc 594 printf("pppoe (data): unknown version/type packet: 0x%x\n", ph->vertype);
robert_jw 0:b2805b6888dc 595 goto drop;
robert_jw 0:b2805b6888dc 596 }
robert_jw 0:b2805b6888dc 597 if (ph->code != 0) {
robert_jw 0:b2805b6888dc 598 goto drop;
robert_jw 0:b2805b6888dc 599 }
robert_jw 0:b2805b6888dc 600
robert_jw 0:b2805b6888dc 601 session = ntohs(ph->session);
robert_jw 0:b2805b6888dc 602 sc = pppoe_find_softc_by_session(session, netif);
robert_jw 0:b2805b6888dc 603 if (sc == NULL) {
robert_jw 0:b2805b6888dc 604 #ifdef PPPOE_TERM_UNKNOWN_SESSIONS
robert_jw 0:b2805b6888dc 605 printf("pppoe: input for unknown session 0x%x, sending PADT\n", session);
robert_jw 0:b2805b6888dc 606 pppoe_send_padt(netif, session, shost);
robert_jw 0:b2805b6888dc 607 #endif
robert_jw 0:b2805b6888dc 608 goto drop;
robert_jw 0:b2805b6888dc 609 }
robert_jw 0:b2805b6888dc 610
robert_jw 0:b2805b6888dc 611 plen = ntohs(ph->plen);
robert_jw 0:b2805b6888dc 612
robert_jw 0:b2805b6888dc 613 if (pbuf_header(pb, -(int)(PPPOE_HEADERLEN)) != 0) {
robert_jw 0:b2805b6888dc 614 /* bail out */
robert_jw 0:b2805b6888dc 615 PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header PPPOE_HEADERLEN failed\n"));
robert_jw 0:b2805b6888dc 616 LINK_STATS_INC(link.lenerr);
robert_jw 0:b2805b6888dc 617 goto drop;
robert_jw 0:b2805b6888dc 618 }
robert_jw 0:b2805b6888dc 619
robert_jw 0:b2805b6888dc 620 PPPDEBUG(LOG_DEBUG, ("pppoe_data_input: %c%c%"U16_F": pkthdr.len=%d, pppoe.len=%d\n",
robert_jw 0:b2805b6888dc 621 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
robert_jw 0:b2805b6888dc 622 pb->len, plen));
robert_jw 0:b2805b6888dc 623
robert_jw 0:b2805b6888dc 624 if (pb->len < plen) {
robert_jw 0:b2805b6888dc 625 goto drop;
robert_jw 0:b2805b6888dc 626 }
robert_jw 0:b2805b6888dc 627
robert_jw 0:b2805b6888dc 628 pppInProcOverEthernet(sc->sc_pd, pb);
robert_jw 0:b2805b6888dc 629
robert_jw 0:b2805b6888dc 630 return;
robert_jw 0:b2805b6888dc 631
robert_jw 0:b2805b6888dc 632 drop:
robert_jw 0:b2805b6888dc 633 pbuf_free(pb);
robert_jw 0:b2805b6888dc 634 }
robert_jw 0:b2805b6888dc 635
robert_jw 0:b2805b6888dc 636 static err_t
robert_jw 0:b2805b6888dc 637 pppoe_output(struct pppoe_softc *sc, struct pbuf *pb)
robert_jw 0:b2805b6888dc 638 {
robert_jw 0:b2805b6888dc 639 struct eth_hdr *ethhdr;
robert_jw 0:b2805b6888dc 640 u16_t etype;
robert_jw 0:b2805b6888dc 641 err_t res;
robert_jw 0:b2805b6888dc 642
robert_jw 0:b2805b6888dc 643 if (!sc->sc_ethif) {
robert_jw 0:b2805b6888dc 644 pbuf_free(pb);
robert_jw 0:b2805b6888dc 645 return ERR_IF;
robert_jw 0:b2805b6888dc 646 }
robert_jw 0:b2805b6888dc 647
robert_jw 0:b2805b6888dc 648 ethhdr = (struct eth_hdr *)pb->payload;
robert_jw 0:b2805b6888dc 649 etype = sc->sc_state == PPPOE_STATE_SESSION ? ETHTYPE_PPPOE : ETHTYPE_PPPOEDISC;
robert_jw 0:b2805b6888dc 650 ethhdr->type = htons(etype);
robert_jw 0:b2805b6888dc 651 MEMCPY(ethhdr->dest.addr, sc->sc_dest.addr, sizeof(ethhdr->dest.addr));
robert_jw 0:b2805b6888dc 652 MEMCPY(ethhdr->src.addr, ((struct eth_addr *)sc->sc_ethif->hwaddr)->addr, sizeof(ethhdr->src.addr));
robert_jw 0:b2805b6888dc 653
robert_jw 0:b2805b6888dc 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",
robert_jw 0:b2805b6888dc 655 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, etype,
robert_jw 0:b2805b6888dc 656 sc->sc_state, sc->sc_session,
robert_jw 0:b2805b6888dc 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],
robert_jw 0:b2805b6888dc 658 pb->tot_len));
robert_jw 0:b2805b6888dc 659
robert_jw 0:b2805b6888dc 660 res = sc->sc_ethif->linkoutput(sc->sc_ethif, pb);
robert_jw 0:b2805b6888dc 661
robert_jw 0:b2805b6888dc 662 pbuf_free(pb);
robert_jw 0:b2805b6888dc 663
robert_jw 0:b2805b6888dc 664 return res;
robert_jw 0:b2805b6888dc 665 }
robert_jw 0:b2805b6888dc 666
robert_jw 0:b2805b6888dc 667 static err_t
robert_jw 0:b2805b6888dc 668 pppoe_send_padi(struct pppoe_softc *sc)
robert_jw 0:b2805b6888dc 669 {
robert_jw 0:b2805b6888dc 670 struct pbuf *pb;
robert_jw 0:b2805b6888dc 671 u8_t *p;
robert_jw 0:b2805b6888dc 672 int len;
robert_jw 0:b2805b6888dc 673 #ifdef PPPOE_TODO
robert_jw 0:b2805b6888dc 674 int l1 = 0, l2 = 0; /* XXX: gcc */
robert_jw 0:b2805b6888dc 675 #endif /* PPPOE_TODO */
robert_jw 0:b2805b6888dc 676
robert_jw 0:b2805b6888dc 677 if (sc->sc_state >PPPOE_STATE_PADI_SENT) {
robert_jw 0:b2805b6888dc 678 PPPDEBUG(LOG_ERR, ("ERROR: pppoe_send_padi in state %d", sc->sc_state));
robert_jw 0:b2805b6888dc 679 }
robert_jw 0:b2805b6888dc 680
robert_jw 0:b2805b6888dc 681 /* calculate length of frame (excluding ethernet header + pppoe header) */
robert_jw 0:b2805b6888dc 682 len = 2 + 2 + 2 + 2 + sizeof sc; /* service name tag is required, host unique is send too */
robert_jw 0:b2805b6888dc 683 #ifdef PPPOE_TODO
robert_jw 0:b2805b6888dc 684 if (sc->sc_service_name != NULL) {
robert_jw 0:b2805b6888dc 685 l1 = (int)strlen(sc->sc_service_name);
robert_jw 0:b2805b6888dc 686 len += l1;
robert_jw 0:b2805b6888dc 687 }
robert_jw 0:b2805b6888dc 688 if (sc->sc_concentrator_name != NULL) {
robert_jw 0:b2805b6888dc 689 l2 = (int)strlen(sc->sc_concentrator_name);
robert_jw 0:b2805b6888dc 690 len += 2 + 2 + l2;
robert_jw 0:b2805b6888dc 691 }
robert_jw 0:b2805b6888dc 692 #endif /* PPPOE_TODO */
robert_jw 0:b2805b6888dc 693 LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
robert_jw 0:b2805b6888dc 694 sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
robert_jw 0:b2805b6888dc 695
robert_jw 0:b2805b6888dc 696 /* allocate a buffer */
robert_jw 0:b2805b6888dc 697 pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
robert_jw 0:b2805b6888dc 698 if (!pb) {
robert_jw 0:b2805b6888dc 699 return ERR_MEM;
robert_jw 0:b2805b6888dc 700 }
robert_jw 0:b2805b6888dc 701 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
robert_jw 0:b2805b6888dc 702
robert_jw 0:b2805b6888dc 703 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
robert_jw 0:b2805b6888dc 704 /* fill in pkt */
robert_jw 0:b2805b6888dc 705 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADI, 0, (u16_t)len);
robert_jw 0:b2805b6888dc 706 PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
robert_jw 0:b2805b6888dc 707 #ifdef PPPOE_TODO
robert_jw 0:b2805b6888dc 708 if (sc->sc_service_name != NULL) {
robert_jw 0:b2805b6888dc 709 PPPOE_ADD_16(p, l1);
robert_jw 0:b2805b6888dc 710 MEMCPY(p, sc->sc_service_name, l1);
robert_jw 0:b2805b6888dc 711 p += l1;
robert_jw 0:b2805b6888dc 712 } else
robert_jw 0:b2805b6888dc 713 #endif /* PPPOE_TODO */
robert_jw 0:b2805b6888dc 714 {
robert_jw 0:b2805b6888dc 715 PPPOE_ADD_16(p, 0);
robert_jw 0:b2805b6888dc 716 }
robert_jw 0:b2805b6888dc 717 #ifdef PPPOE_TODO
robert_jw 0:b2805b6888dc 718 if (sc->sc_concentrator_name != NULL) {
robert_jw 0:b2805b6888dc 719 PPPOE_ADD_16(p, PPPOE_TAG_ACNAME);
robert_jw 0:b2805b6888dc 720 PPPOE_ADD_16(p, l2);
robert_jw 0:b2805b6888dc 721 MEMCPY(p, sc->sc_concentrator_name, l2);
robert_jw 0:b2805b6888dc 722 p += l2;
robert_jw 0:b2805b6888dc 723 }
robert_jw 0:b2805b6888dc 724 #endif /* PPPOE_TODO */
robert_jw 0:b2805b6888dc 725 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
robert_jw 0:b2805b6888dc 726 PPPOE_ADD_16(p, sizeof(sc));
robert_jw 0:b2805b6888dc 727 MEMCPY(p, &sc, sizeof sc);
robert_jw 0:b2805b6888dc 728
robert_jw 0:b2805b6888dc 729 /* send pkt */
robert_jw 0:b2805b6888dc 730 return pppoe_output(sc, pb);
robert_jw 0:b2805b6888dc 731 }
robert_jw 0:b2805b6888dc 732
robert_jw 0:b2805b6888dc 733 static void
robert_jw 0:b2805b6888dc 734 pppoe_timeout(void *arg)
robert_jw 0:b2805b6888dc 735 {
robert_jw 0:b2805b6888dc 736 int retry_wait, err;
robert_jw 0:b2805b6888dc 737 struct pppoe_softc *sc = (struct pppoe_softc*)arg;
robert_jw 0:b2805b6888dc 738
robert_jw 0:b2805b6888dc 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));
robert_jw 0:b2805b6888dc 740
robert_jw 0:b2805b6888dc 741 switch (sc->sc_state) {
robert_jw 0:b2805b6888dc 742 case PPPOE_STATE_PADI_SENT:
robert_jw 0:b2805b6888dc 743 /*
robert_jw 0:b2805b6888dc 744 * We have two basic ways of retrying:
robert_jw 0:b2805b6888dc 745 * - Quick retry mode: try a few times in short sequence
robert_jw 0:b2805b6888dc 746 * - Slow retry mode: we already had a connection successfully
robert_jw 0:b2805b6888dc 747 * established and will try infinitely (without user
robert_jw 0:b2805b6888dc 748 * intervention)
robert_jw 0:b2805b6888dc 749 * We only enter slow retry mode if IFF_LINK1 (aka autodial)
robert_jw 0:b2805b6888dc 750 * is not set.
robert_jw 0:b2805b6888dc 751 */
robert_jw 0:b2805b6888dc 752
robert_jw 0:b2805b6888dc 753 /* initialize for quick retry mode */
robert_jw 0:b2805b6888dc 754 retry_wait = PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried);
robert_jw 0:b2805b6888dc 755
robert_jw 0:b2805b6888dc 756 sc->sc_padi_retried++;
robert_jw 0:b2805b6888dc 757 if (sc->sc_padi_retried >= PPPOE_DISC_MAXPADI) {
robert_jw 0:b2805b6888dc 758 #if 0
robert_jw 0:b2805b6888dc 759 if ((sc->sc_sppp.pp_if.if_flags & IFF_LINK1) == 0) {
robert_jw 0:b2805b6888dc 760 /* slow retry mode */
robert_jw 0:b2805b6888dc 761 retry_wait = PPPOE_SLOW_RETRY;
robert_jw 0:b2805b6888dc 762 } else
robert_jw 0:b2805b6888dc 763 #endif
robert_jw 0:b2805b6888dc 764 {
robert_jw 0:b2805b6888dc 765 pppoe_abort_connect(sc);
robert_jw 0:b2805b6888dc 766 return;
robert_jw 0:b2805b6888dc 767 }
robert_jw 0:b2805b6888dc 768 }
robert_jw 0:b2805b6888dc 769 if ((err = pppoe_send_padi(sc)) != 0) {
robert_jw 0:b2805b6888dc 770 sc->sc_padi_retried--;
robert_jw 0:b2805b6888dc 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));
robert_jw 0:b2805b6888dc 772 }
robert_jw 0:b2805b6888dc 773 sys_timeout(retry_wait, pppoe_timeout, sc);
robert_jw 0:b2805b6888dc 774 break;
robert_jw 0:b2805b6888dc 775
robert_jw 0:b2805b6888dc 776 case PPPOE_STATE_PADR_SENT:
robert_jw 0:b2805b6888dc 777 sc->sc_padr_retried++;
robert_jw 0:b2805b6888dc 778 if (sc->sc_padr_retried >= PPPOE_DISC_MAXPADR) {
robert_jw 0:b2805b6888dc 779 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
robert_jw 0:b2805b6888dc 780 sc->sc_state = PPPOE_STATE_PADI_SENT;
robert_jw 0:b2805b6888dc 781 sc->sc_padr_retried = 0;
robert_jw 0:b2805b6888dc 782 if ((err = pppoe_send_padi(sc)) != 0) {
robert_jw 0:b2805b6888dc 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));
robert_jw 0:b2805b6888dc 784 }
robert_jw 0:b2805b6888dc 785 sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried), pppoe_timeout, sc);
robert_jw 0:b2805b6888dc 786 return;
robert_jw 0:b2805b6888dc 787 }
robert_jw 0:b2805b6888dc 788 if ((err = pppoe_send_padr(sc)) != 0) {
robert_jw 0:b2805b6888dc 789 sc->sc_padr_retried--;
robert_jw 0:b2805b6888dc 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));
robert_jw 0:b2805b6888dc 791 }
robert_jw 0:b2805b6888dc 792 sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
robert_jw 0:b2805b6888dc 793 break;
robert_jw 0:b2805b6888dc 794 case PPPOE_STATE_CLOSING:
robert_jw 0:b2805b6888dc 795 pppoe_do_disconnect(sc);
robert_jw 0:b2805b6888dc 796 break;
robert_jw 0:b2805b6888dc 797 default:
robert_jw 0:b2805b6888dc 798 return; /* all done, work in peace */
robert_jw 0:b2805b6888dc 799 }
robert_jw 0:b2805b6888dc 800 }
robert_jw 0:b2805b6888dc 801
robert_jw 0:b2805b6888dc 802 /* Start a connection (i.e. initiate discovery phase) */
robert_jw 0:b2805b6888dc 803 int
robert_jw 0:b2805b6888dc 804 pppoe_connect(struct pppoe_softc *sc)
robert_jw 0:b2805b6888dc 805 {
robert_jw 0:b2805b6888dc 806 int err;
robert_jw 0:b2805b6888dc 807
robert_jw 0:b2805b6888dc 808 if (sc->sc_state != PPPOE_STATE_INITIAL) {
robert_jw 0:b2805b6888dc 809 return EBUSY;
robert_jw 0:b2805b6888dc 810 }
robert_jw 0:b2805b6888dc 811
robert_jw 0:b2805b6888dc 812 #ifdef PPPOE_SERVER
robert_jw 0:b2805b6888dc 813 /* wait PADI if IFF_PASSIVE */
robert_jw 0:b2805b6888dc 814 if ((sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
robert_jw 0:b2805b6888dc 815 return 0;
robert_jw 0:b2805b6888dc 816 }
robert_jw 0:b2805b6888dc 817 #endif
robert_jw 0:b2805b6888dc 818 /* save state, in case we fail to send PADI */
robert_jw 0:b2805b6888dc 819 sc->sc_state = PPPOE_STATE_PADI_SENT;
robert_jw 0:b2805b6888dc 820 sc->sc_padr_retried = 0;
robert_jw 0:b2805b6888dc 821 err = pppoe_send_padi(sc);
robert_jw 0:b2805b6888dc 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));
robert_jw 0:b2805b6888dc 823 sys_timeout(PPPOE_DISC_TIMEOUT, pppoe_timeout, sc);
robert_jw 0:b2805b6888dc 824 return err;
robert_jw 0:b2805b6888dc 825 }
robert_jw 0:b2805b6888dc 826
robert_jw 0:b2805b6888dc 827 /* disconnect */
robert_jw 0:b2805b6888dc 828 void
robert_jw 0:b2805b6888dc 829 pppoe_disconnect(struct pppoe_softc *sc)
robert_jw 0:b2805b6888dc 830 {
robert_jw 0:b2805b6888dc 831 if (sc->sc_state < PPPOE_STATE_SESSION) {
robert_jw 0:b2805b6888dc 832 return;
robert_jw 0:b2805b6888dc 833 }
robert_jw 0:b2805b6888dc 834 /*
robert_jw 0:b2805b6888dc 835 * Do not call pppoe_disconnect here, the upper layer state
robert_jw 0:b2805b6888dc 836 * machine gets confused by this. We must return from this
robert_jw 0:b2805b6888dc 837 * function and defer disconnecting to the timeout handler.
robert_jw 0:b2805b6888dc 838 */
robert_jw 0:b2805b6888dc 839 sc->sc_state = PPPOE_STATE_CLOSING;
robert_jw 0:b2805b6888dc 840 sys_timeout(20, pppoe_timeout, sc);
robert_jw 0:b2805b6888dc 841 }
robert_jw 0:b2805b6888dc 842
robert_jw 0:b2805b6888dc 843 static int
robert_jw 0:b2805b6888dc 844 pppoe_do_disconnect(struct pppoe_softc *sc)
robert_jw 0:b2805b6888dc 845 {
robert_jw 0:b2805b6888dc 846 int err;
robert_jw 0:b2805b6888dc 847
robert_jw 0:b2805b6888dc 848 if (sc->sc_state < PPPOE_STATE_SESSION) {
robert_jw 0:b2805b6888dc 849 err = EBUSY;
robert_jw 0:b2805b6888dc 850 } else {
robert_jw 0:b2805b6888dc 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));
robert_jw 0:b2805b6888dc 852 err = pppoe_send_padt(sc->sc_ethif, sc->sc_session, (const u8_t *)&sc->sc_dest);
robert_jw 0:b2805b6888dc 853 }
robert_jw 0:b2805b6888dc 854
robert_jw 0:b2805b6888dc 855 /* cleanup softc */
robert_jw 0:b2805b6888dc 856 sc->sc_state = PPPOE_STATE_INITIAL;
robert_jw 0:b2805b6888dc 857 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
robert_jw 0:b2805b6888dc 858 sc->sc_ac_cookie_len = 0;
robert_jw 0:b2805b6888dc 859 #ifdef PPPOE_SERVER
robert_jw 0:b2805b6888dc 860 if (sc->sc_hunique) {
robert_jw 0:b2805b6888dc 861 mem_free(sc->sc_hunique);
robert_jw 0:b2805b6888dc 862 sc->sc_hunique = NULL;
robert_jw 0:b2805b6888dc 863 }
robert_jw 0:b2805b6888dc 864 sc->sc_hunique_len = 0;
robert_jw 0:b2805b6888dc 865 #endif
robert_jw 0:b2805b6888dc 866 sc->sc_session = 0;
robert_jw 0:b2805b6888dc 867
robert_jw 0:b2805b6888dc 868 sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
robert_jw 0:b2805b6888dc 869
robert_jw 0:b2805b6888dc 870 return err;
robert_jw 0:b2805b6888dc 871 }
robert_jw 0:b2805b6888dc 872
robert_jw 0:b2805b6888dc 873 /* Connection attempt aborted */
robert_jw 0:b2805b6888dc 874 static void
robert_jw 0:b2805b6888dc 875 pppoe_abort_connect(struct pppoe_softc *sc)
robert_jw 0:b2805b6888dc 876 {
robert_jw 0:b2805b6888dc 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);
robert_jw 0:b2805b6888dc 878 sc->sc_state = PPPOE_STATE_CLOSING;
robert_jw 0:b2805b6888dc 879
robert_jw 0:b2805b6888dc 880 sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
robert_jw 0:b2805b6888dc 881
robert_jw 0:b2805b6888dc 882 /* clear connection state */
robert_jw 0:b2805b6888dc 883 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
robert_jw 0:b2805b6888dc 884 sc->sc_state = PPPOE_STATE_INITIAL;
robert_jw 0:b2805b6888dc 885 }
robert_jw 0:b2805b6888dc 886
robert_jw 0:b2805b6888dc 887 /* Send a PADR packet */
robert_jw 0:b2805b6888dc 888 static err_t
robert_jw 0:b2805b6888dc 889 pppoe_send_padr(struct pppoe_softc *sc)
robert_jw 0:b2805b6888dc 890 {
robert_jw 0:b2805b6888dc 891 struct pbuf *pb;
robert_jw 0:b2805b6888dc 892 u8_t *p;
robert_jw 0:b2805b6888dc 893 size_t len;
robert_jw 0:b2805b6888dc 894 #ifdef PPPOE_TODO
robert_jw 0:b2805b6888dc 895 size_t l1 = 0; /* XXX: gcc */
robert_jw 0:b2805b6888dc 896 #endif /* PPPOE_TODO */
robert_jw 0:b2805b6888dc 897
robert_jw 0:b2805b6888dc 898 if (sc->sc_state != PPPOE_STATE_PADR_SENT) {
robert_jw 0:b2805b6888dc 899 return ERR_CONN;
robert_jw 0:b2805b6888dc 900 }
robert_jw 0:b2805b6888dc 901
robert_jw 0:b2805b6888dc 902 len = 2 + 2 + 2 + 2 + sizeof(sc); /* service name, host unique */
robert_jw 0:b2805b6888dc 903 #ifdef PPPOE_TODO
robert_jw 0:b2805b6888dc 904 if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
robert_jw 0:b2805b6888dc 905 l1 = strlen(sc->sc_service_name);
robert_jw 0:b2805b6888dc 906 len += l1;
robert_jw 0:b2805b6888dc 907 }
robert_jw 0:b2805b6888dc 908 #endif /* PPPOE_TODO */
robert_jw 0:b2805b6888dc 909 if (sc->sc_ac_cookie_len > 0) {
robert_jw 0:b2805b6888dc 910 len += 2 + 2 + sc->sc_ac_cookie_len; /* AC cookie */
robert_jw 0:b2805b6888dc 911 }
robert_jw 0:b2805b6888dc 912 LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
robert_jw 0:b2805b6888dc 913 sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
robert_jw 0:b2805b6888dc 914 pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
robert_jw 0:b2805b6888dc 915 if (!pb) {
robert_jw 0:b2805b6888dc 916 return ERR_MEM;
robert_jw 0:b2805b6888dc 917 }
robert_jw 0:b2805b6888dc 918 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
robert_jw 0:b2805b6888dc 919 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
robert_jw 0:b2805b6888dc 920 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADR, 0, len);
robert_jw 0:b2805b6888dc 921 PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
robert_jw 0:b2805b6888dc 922 #ifdef PPPOE_TODO
robert_jw 0:b2805b6888dc 923 if (sc->sc_service_name != NULL) {
robert_jw 0:b2805b6888dc 924 PPPOE_ADD_16(p, l1);
robert_jw 0:b2805b6888dc 925 MEMCPY(p, sc->sc_service_name, l1);
robert_jw 0:b2805b6888dc 926 p += l1;
robert_jw 0:b2805b6888dc 927 } else
robert_jw 0:b2805b6888dc 928 #endif /* PPPOE_TODO */
robert_jw 0:b2805b6888dc 929 {
robert_jw 0:b2805b6888dc 930 PPPOE_ADD_16(p, 0);
robert_jw 0:b2805b6888dc 931 }
robert_jw 0:b2805b6888dc 932 if (sc->sc_ac_cookie_len > 0) {
robert_jw 0:b2805b6888dc 933 PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
robert_jw 0:b2805b6888dc 934 PPPOE_ADD_16(p, sc->sc_ac_cookie_len);
robert_jw 0:b2805b6888dc 935 MEMCPY(p, sc->sc_ac_cookie, sc->sc_ac_cookie_len);
robert_jw 0:b2805b6888dc 936 p += sc->sc_ac_cookie_len;
robert_jw 0:b2805b6888dc 937 }
robert_jw 0:b2805b6888dc 938 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
robert_jw 0:b2805b6888dc 939 PPPOE_ADD_16(p, sizeof(sc));
robert_jw 0:b2805b6888dc 940 MEMCPY(p, &sc, sizeof sc);
robert_jw 0:b2805b6888dc 941
robert_jw 0:b2805b6888dc 942 return pppoe_output(sc, pb);
robert_jw 0:b2805b6888dc 943 }
robert_jw 0:b2805b6888dc 944
robert_jw 0:b2805b6888dc 945 /* send a PADT packet */
robert_jw 0:b2805b6888dc 946 static err_t
robert_jw 0:b2805b6888dc 947 pppoe_send_padt(struct netif *outgoing_if, u_int session, const u8_t *dest)
robert_jw 0:b2805b6888dc 948 {
robert_jw 0:b2805b6888dc 949 struct pbuf *pb;
robert_jw 0:b2805b6888dc 950 struct eth_hdr *ethhdr;
robert_jw 0:b2805b6888dc 951 err_t res;
robert_jw 0:b2805b6888dc 952 u8_t *p;
robert_jw 0:b2805b6888dc 953
robert_jw 0:b2805b6888dc 954 pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN, PBUF_RAM);
robert_jw 0:b2805b6888dc 955 if (!pb) {
robert_jw 0:b2805b6888dc 956 return ERR_MEM;
robert_jw 0:b2805b6888dc 957 }
robert_jw 0:b2805b6888dc 958 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
robert_jw 0:b2805b6888dc 959
robert_jw 0:b2805b6888dc 960 ethhdr = (struct eth_hdr *)pb->payload;
robert_jw 0:b2805b6888dc 961 ethhdr->type = PP_HTONS(ETHTYPE_PPPOEDISC);
robert_jw 0:b2805b6888dc 962 MEMCPY(ethhdr->dest.addr, dest, sizeof(ethhdr->dest.addr));
robert_jw 0:b2805b6888dc 963 MEMCPY(ethhdr->src.addr, ((struct eth_addr *)outgoing_if->hwaddr)->addr, sizeof(ethhdr->src.addr));
robert_jw 0:b2805b6888dc 964
robert_jw 0:b2805b6888dc 965 p = (u8_t*)(ethhdr + 1);
robert_jw 0:b2805b6888dc 966 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADT, session, 0);
robert_jw 0:b2805b6888dc 967
robert_jw 0:b2805b6888dc 968 res = outgoing_if->linkoutput(outgoing_if, pb);
robert_jw 0:b2805b6888dc 969
robert_jw 0:b2805b6888dc 970 pbuf_free(pb);
robert_jw 0:b2805b6888dc 971
robert_jw 0:b2805b6888dc 972 return res;
robert_jw 0:b2805b6888dc 973 }
robert_jw 0:b2805b6888dc 974
robert_jw 0:b2805b6888dc 975 #ifdef PPPOE_SERVER
robert_jw 0:b2805b6888dc 976 static err_t
robert_jw 0:b2805b6888dc 977 pppoe_send_pado(struct pppoe_softc *sc)
robert_jw 0:b2805b6888dc 978 {
robert_jw 0:b2805b6888dc 979 struct pbuf *pb;
robert_jw 0:b2805b6888dc 980 u8_t *p;
robert_jw 0:b2805b6888dc 981 size_t len;
robert_jw 0:b2805b6888dc 982
robert_jw 0:b2805b6888dc 983 if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
robert_jw 0:b2805b6888dc 984 return ERR_CONN;
robert_jw 0:b2805b6888dc 985 }
robert_jw 0:b2805b6888dc 986
robert_jw 0:b2805b6888dc 987 /* calc length */
robert_jw 0:b2805b6888dc 988 len = 0;
robert_jw 0:b2805b6888dc 989 /* include ac_cookie */
robert_jw 0:b2805b6888dc 990 len += 2 + 2 + sizeof(sc);
robert_jw 0:b2805b6888dc 991 /* include hunique */
robert_jw 0:b2805b6888dc 992 len += 2 + 2 + sc->sc_hunique_len;
robert_jw 0:b2805b6888dc 993 pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
robert_jw 0:b2805b6888dc 994 if (!pb) {
robert_jw 0:b2805b6888dc 995 return ERR_MEM;
robert_jw 0:b2805b6888dc 996 }
robert_jw 0:b2805b6888dc 997 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
robert_jw 0:b2805b6888dc 998 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
robert_jw 0:b2805b6888dc 999 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADO, 0, len);
robert_jw 0:b2805b6888dc 1000 PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
robert_jw 0:b2805b6888dc 1001 PPPOE_ADD_16(p, sizeof(sc));
robert_jw 0:b2805b6888dc 1002 MEMCPY(p, &sc, sizeof(sc));
robert_jw 0:b2805b6888dc 1003 p += sizeof(sc);
robert_jw 0:b2805b6888dc 1004 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
robert_jw 0:b2805b6888dc 1005 PPPOE_ADD_16(p, sc->sc_hunique_len);
robert_jw 0:b2805b6888dc 1006 MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
robert_jw 0:b2805b6888dc 1007 return pppoe_output(sc, pb);
robert_jw 0:b2805b6888dc 1008 }
robert_jw 0:b2805b6888dc 1009
robert_jw 0:b2805b6888dc 1010 static err_t
robert_jw 0:b2805b6888dc 1011 pppoe_send_pads(struct pppoe_softc *sc)
robert_jw 0:b2805b6888dc 1012 {
robert_jw 0:b2805b6888dc 1013 struct pbuf *pb;
robert_jw 0:b2805b6888dc 1014 u8_t *p;
robert_jw 0:b2805b6888dc 1015 size_t len, l1 = 0; /* XXX: gcc */
robert_jw 0:b2805b6888dc 1016
robert_jw 0:b2805b6888dc 1017 if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
robert_jw 0:b2805b6888dc 1018 return ERR_CONN;
robert_jw 0:b2805b6888dc 1019 }
robert_jw 0:b2805b6888dc 1020
robert_jw 0:b2805b6888dc 1021 sc->sc_session = mono_time.tv_sec % 0xff + 1;
robert_jw 0:b2805b6888dc 1022 /* calc length */
robert_jw 0:b2805b6888dc 1023 len = 0;
robert_jw 0:b2805b6888dc 1024 /* include hunique */
robert_jw 0:b2805b6888dc 1025 len += 2 + 2 + 2 + 2 + sc->sc_hunique_len; /* service name, host unique*/
robert_jw 0:b2805b6888dc 1026 if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
robert_jw 0:b2805b6888dc 1027 l1 = strlen(sc->sc_service_name);
robert_jw 0:b2805b6888dc 1028 len += l1;
robert_jw 0:b2805b6888dc 1029 }
robert_jw 0:b2805b6888dc 1030 pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
robert_jw 0:b2805b6888dc 1031 if (!pb) {
robert_jw 0:b2805b6888dc 1032 return ERR_MEM;
robert_jw 0:b2805b6888dc 1033 }
robert_jw 0:b2805b6888dc 1034 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
robert_jw 0:b2805b6888dc 1035 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
robert_jw 0:b2805b6888dc 1036 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADS, sc->sc_session, len);
robert_jw 0:b2805b6888dc 1037 PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
robert_jw 0:b2805b6888dc 1038 if (sc->sc_service_name != NULL) {
robert_jw 0:b2805b6888dc 1039 PPPOE_ADD_16(p, l1);
robert_jw 0:b2805b6888dc 1040 MEMCPY(p, sc->sc_service_name, l1);
robert_jw 0:b2805b6888dc 1041 p += l1;
robert_jw 0:b2805b6888dc 1042 } else {
robert_jw 0:b2805b6888dc 1043 PPPOE_ADD_16(p, 0);
robert_jw 0:b2805b6888dc 1044 }
robert_jw 0:b2805b6888dc 1045 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
robert_jw 0:b2805b6888dc 1046 PPPOE_ADD_16(p, sc->sc_hunique_len);
robert_jw 0:b2805b6888dc 1047 MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
robert_jw 0:b2805b6888dc 1048 return pppoe_output(sc, pb);
robert_jw 0:b2805b6888dc 1049 }
robert_jw 0:b2805b6888dc 1050 #endif
robert_jw 0:b2805b6888dc 1051
robert_jw 0:b2805b6888dc 1052 err_t
robert_jw 0:b2805b6888dc 1053 pppoe_xmit(struct pppoe_softc *sc, struct pbuf *pb)
robert_jw 0:b2805b6888dc 1054 {
robert_jw 0:b2805b6888dc 1055 u8_t *p;
robert_jw 0:b2805b6888dc 1056 size_t len;
robert_jw 0:b2805b6888dc 1057
robert_jw 0:b2805b6888dc 1058 /* are we ready to process data yet? */
robert_jw 0:b2805b6888dc 1059 if (sc->sc_state < PPPOE_STATE_SESSION) {
robert_jw 0:b2805b6888dc 1060 /*sppp_flush(&sc->sc_sppp.pp_if);*/
robert_jw 0:b2805b6888dc 1061 pbuf_free(pb);
robert_jw 0:b2805b6888dc 1062 return ERR_CONN;
robert_jw 0:b2805b6888dc 1063 }
robert_jw 0:b2805b6888dc 1064
robert_jw 0:b2805b6888dc 1065 len = pb->tot_len;
robert_jw 0:b2805b6888dc 1066
robert_jw 0:b2805b6888dc 1067 /* make room for Ethernet header - should not fail */
robert_jw 0:b2805b6888dc 1068 if (pbuf_header(pb, sizeof(struct eth_hdr) + PPPOE_HEADERLEN) != 0) {
robert_jw 0:b2805b6888dc 1069 /* bail out */
robert_jw 0:b2805b6888dc 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));
robert_jw 0:b2805b6888dc 1071 LINK_STATS_INC(link.lenerr);
robert_jw 0:b2805b6888dc 1072 pbuf_free(pb);
robert_jw 0:b2805b6888dc 1073 return ERR_BUF;
robert_jw 0:b2805b6888dc 1074 }
robert_jw 0:b2805b6888dc 1075
robert_jw 0:b2805b6888dc 1076 p = (u8_t*)pb->payload + sizeof(struct eth_hdr);
robert_jw 0:b2805b6888dc 1077 PPPOE_ADD_HEADER(p, 0, sc->sc_session, len);
robert_jw 0:b2805b6888dc 1078
robert_jw 0:b2805b6888dc 1079 return pppoe_output(sc, pb);
robert_jw 0:b2805b6888dc 1080 }
robert_jw 0:b2805b6888dc 1081
robert_jw 0:b2805b6888dc 1082 #if 0 /*def PFIL_HOOKS*/
robert_jw 0:b2805b6888dc 1083 static int
robert_jw 0:b2805b6888dc 1084 pppoe_ifattach_hook(void *arg, struct pbuf **mp, struct netif *ifp, int dir)
robert_jw 0:b2805b6888dc 1085 {
robert_jw 0:b2805b6888dc 1086 struct pppoe_softc *sc;
robert_jw 0:b2805b6888dc 1087 int s;
robert_jw 0:b2805b6888dc 1088
robert_jw 0:b2805b6888dc 1089 if (mp != (struct pbuf **)PFIL_IFNET_DETACH) {
robert_jw 0:b2805b6888dc 1090 return 0;
robert_jw 0:b2805b6888dc 1091 }
robert_jw 0:b2805b6888dc 1092
robert_jw 0:b2805b6888dc 1093 LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
robert_jw 0:b2805b6888dc 1094 if (sc->sc_ethif != ifp) {
robert_jw 0:b2805b6888dc 1095 continue;
robert_jw 0:b2805b6888dc 1096 }
robert_jw 0:b2805b6888dc 1097 if (sc->sc_sppp.pp_if.if_flags & IFF_UP) {
robert_jw 0:b2805b6888dc 1098 sc->sc_sppp.pp_if.if_flags &= ~(IFF_UP|IFF_RUNNING);
robert_jw 0:b2805b6888dc 1099 printf("%c%c%"U16_F": ethernet interface detached, going down\n",
robert_jw 0:b2805b6888dc 1100 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
robert_jw 0:b2805b6888dc 1101 }
robert_jw 0:b2805b6888dc 1102 sc->sc_ethif = NULL;
robert_jw 0:b2805b6888dc 1103 pppoe_clear_softc(sc, "ethernet interface detached");
robert_jw 0:b2805b6888dc 1104 }
robert_jw 0:b2805b6888dc 1105
robert_jw 0:b2805b6888dc 1106 return 0;
robert_jw 0:b2805b6888dc 1107 }
robert_jw 0:b2805b6888dc 1108 #endif
robert_jw 0:b2805b6888dc 1109
robert_jw 0:b2805b6888dc 1110 static void
robert_jw 0:b2805b6888dc 1111 pppoe_clear_softc(struct pppoe_softc *sc, const char *message)
robert_jw 0:b2805b6888dc 1112 {
robert_jw 0:b2805b6888dc 1113 LWIP_UNUSED_ARG(message);
robert_jw 0:b2805b6888dc 1114
robert_jw 0:b2805b6888dc 1115 /* stop timer */
robert_jw 0:b2805b6888dc 1116 sys_untimeout(pppoe_timeout, sc);
robert_jw 0:b2805b6888dc 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));
robert_jw 0:b2805b6888dc 1118
robert_jw 0:b2805b6888dc 1119 /* fix our state */
robert_jw 0:b2805b6888dc 1120 sc->sc_state = PPPOE_STATE_INITIAL;
robert_jw 0:b2805b6888dc 1121
robert_jw 0:b2805b6888dc 1122 /* notify upper layers */
robert_jw 0:b2805b6888dc 1123 sc->sc_linkStatusCB(sc->sc_pd, 0);
robert_jw 0:b2805b6888dc 1124
robert_jw 0:b2805b6888dc 1125 /* clean up softc */
robert_jw 0:b2805b6888dc 1126 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
robert_jw 0:b2805b6888dc 1127 sc->sc_ac_cookie_len = 0;
robert_jw 0:b2805b6888dc 1128 sc->sc_session = 0;
robert_jw 0:b2805b6888dc 1129 }
robert_jw 0:b2805b6888dc 1130
robert_jw 0:b2805b6888dc 1131 #endif /* PPPOE_SUPPORT */
robert_jw 0:b2805b6888dc 1132