孙 毅明 / Mbed 2 deprecated 123

创建mbed

Dependencies:   EthernetInterface SDFileSystem mbed-rtos mbed

EthernetInterface/lwip/netif/ppp/ppp_oe.c@1:6465a3f5c58a, 2018-03-06 (annotated)

Committer:
sunyiming
Date:
Tue Mar 06 08:53:46 2018 +0000
Revision:
1:6465a3f5c58a
??OK

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sunyiming 1:6465a3f5c58a 1 /*****************************************************************************
sunyiming 1:6465a3f5c58a 2 * ppp_oe.c - PPP Over Ethernet implementation for lwIP.
sunyiming 1:6465a3f5c58a 3 *
sunyiming 1:6465a3f5c58a 4 * Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc.
sunyiming 1:6465a3f5c58a 5 *
sunyiming 1:6465a3f5c58a 6 * The authors hereby grant permission to use, copy, modify, distribute,
sunyiming 1:6465a3f5c58a 7 * and license this software and its documentation for any purpose, provided
sunyiming 1:6465a3f5c58a 8 * that existing copyright notices are retained in all copies and that this
sunyiming 1:6465a3f5c58a 9 * notice and the following disclaimer are included verbatim in any
sunyiming 1:6465a3f5c58a 10 * distributions. No written agreement, license, or royalty fee is required
sunyiming 1:6465a3f5c58a 11 * for any of the authorized uses.
sunyiming 1:6465a3f5c58a 12 *
sunyiming 1:6465a3f5c58a 13 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
sunyiming 1:6465a3f5c58a 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
sunyiming 1:6465a3f5c58a 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
sunyiming 1:6465a3f5c58a 16 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
sunyiming 1:6465a3f5c58a 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
sunyiming 1:6465a3f5c58a 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
sunyiming 1:6465a3f5c58a 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
sunyiming 1:6465a3f5c58a 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
sunyiming 1:6465a3f5c58a 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
sunyiming 1:6465a3f5c58a 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
sunyiming 1:6465a3f5c58a 23 *
sunyiming 1:6465a3f5c58a 24 ******************************************************************************
sunyiming 1:6465a3f5c58a 25 * REVISION HISTORY
sunyiming 1:6465a3f5c58a 26 *
sunyiming 1:6465a3f5c58a 27 * 06-01-01 Marc Boucher <marc@mbsi.ca>
sunyiming 1:6465a3f5c58a 28 * Ported to lwIP.
sunyiming 1:6465a3f5c58a 29 *****************************************************************************/
sunyiming 1:6465a3f5c58a 30
sunyiming 1:6465a3f5c58a 31
sunyiming 1:6465a3f5c58a 32
sunyiming 1:6465a3f5c58a 33 /* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */
sunyiming 1:6465a3f5c58a 34
sunyiming 1:6465a3f5c58a 35 /*-
sunyiming 1:6465a3f5c58a 36 * Copyright (c) 2002 The NetBSD Foundation, Inc.
sunyiming 1:6465a3f5c58a 37 * All rights reserved.
sunyiming 1:6465a3f5c58a 38 *
sunyiming 1:6465a3f5c58a 39 * This code is derived from software contributed to The NetBSD Foundation
sunyiming 1:6465a3f5c58a 40 * by Martin Husemann <martin@NetBSD.org>.
sunyiming 1:6465a3f5c58a 41 *
sunyiming 1:6465a3f5c58a 42 * Redistribution and use in source and binary forms, with or without
sunyiming 1:6465a3f5c58a 43 * modification, are permitted provided that the following conditions
sunyiming 1:6465a3f5c58a 44 * are met:
sunyiming 1:6465a3f5c58a 45 * 1. Redistributions of source code must retain the above copyright
sunyiming 1:6465a3f5c58a 46 * notice, this list of conditions and the following disclaimer.
sunyiming 1:6465a3f5c58a 47 * 2. Redistributions in binary form must reproduce the above copyright
sunyiming 1:6465a3f5c58a 48 * notice, this list of conditions and the following disclaimer in the
sunyiming 1:6465a3f5c58a 49 * documentation and/or other materials provided with the distribution.
sunyiming 1:6465a3f5c58a 50 * 3. All advertising materials mentioning features or use of this software
sunyiming 1:6465a3f5c58a 51 * must display the following acknowledgement:
sunyiming 1:6465a3f5c58a 52 * This product includes software developed by the NetBSD
sunyiming 1:6465a3f5c58a 53 * Foundation, Inc. and its contributors.
sunyiming 1:6465a3f5c58a 54 * 4. Neither the name of The NetBSD Foundation nor the names of its
sunyiming 1:6465a3f5c58a 55 * contributors may be used to endorse or promote products derived
sunyiming 1:6465a3f5c58a 56 * from this software without specific prior written permission.
sunyiming 1:6465a3f5c58a 57 *
sunyiming 1:6465a3f5c58a 58 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
sunyiming 1:6465a3f5c58a 59 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
sunyiming 1:6465a3f5c58a 60 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
sunyiming 1:6465a3f5c58a 61 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
sunyiming 1:6465a3f5c58a 62 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
sunyiming 1:6465a3f5c58a 63 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
sunyiming 1:6465a3f5c58a 64 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
sunyiming 1:6465a3f5c58a 65 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
sunyiming 1:6465a3f5c58a 66 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
sunyiming 1:6465a3f5c58a 67 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
sunyiming 1:6465a3f5c58a 68 * POSSIBILITY OF SUCH DAMAGE.
sunyiming 1:6465a3f5c58a 69 */
sunyiming 1:6465a3f5c58a 70
sunyiming 1:6465a3f5c58a 71 #include "lwip/opt.h"
sunyiming 1:6465a3f5c58a 72
sunyiming 1:6465a3f5c58a 73 #if PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */
sunyiming 1:6465a3f5c58a 74
sunyiming 1:6465a3f5c58a 75 #include "netif/ppp_oe.h"
sunyiming 1:6465a3f5c58a 76
sunyiming 1:6465a3f5c58a 77 #include "ppp.h"
sunyiming 1:6465a3f5c58a 78 #include "pppdebug.h"
sunyiming 1:6465a3f5c58a 79
sunyiming 1:6465a3f5c58a 80 #include "lwip/timers.h"
sunyiming 1:6465a3f5c58a 81 #include "lwip/memp.h"
sunyiming 1:6465a3f5c58a 82
sunyiming 1:6465a3f5c58a 83 #include <string.h>
sunyiming 1:6465a3f5c58a 84 #include <stdio.h>
sunyiming 1:6465a3f5c58a 85
sunyiming 1:6465a3f5c58a 86
sunyiming 1:6465a3f5c58a 87 /* Add a 16 bit unsigned value to a buffer pointed to by PTR */
sunyiming 1:6465a3f5c58a 88 #define PPPOE_ADD_16(PTR, VAL) \
sunyiming 1:6465a3f5c58a 89 *(PTR)++ = (u8_t)((VAL) / 256); \
sunyiming 1:6465a3f5c58a 90 *(PTR)++ = (u8_t)((VAL) % 256)
sunyiming 1:6465a3f5c58a 91
sunyiming 1:6465a3f5c58a 92 /* Add a complete PPPoE header to the buffer pointed to by PTR */
sunyiming 1:6465a3f5c58a 93 #define PPPOE_ADD_HEADER(PTR, CODE, SESS, LEN) \
sunyiming 1:6465a3f5c58a 94 *(PTR)++ = PPPOE_VERTYPE; \
sunyiming 1:6465a3f5c58a 95 *(PTR)++ = (CODE); \
sunyiming 1:6465a3f5c58a 96 PPPOE_ADD_16(PTR, SESS); \
sunyiming 1:6465a3f5c58a 97 PPPOE_ADD_16(PTR, LEN)
sunyiming 1:6465a3f5c58a 98
sunyiming 1:6465a3f5c58a 99 #define PPPOE_DISC_TIMEOUT (5*1000) /* base for quick timeout calculation */
sunyiming 1:6465a3f5c58a 100 #define PPPOE_SLOW_RETRY (60*1000) /* persistent retry interval */
sunyiming 1:6465a3f5c58a 101 #define PPPOE_DISC_MAXPADI 4 /* retry PADI four times (quickly) */
sunyiming 1:6465a3f5c58a 102 #define PPPOE_DISC_MAXPADR 2 /* retry PADR twice */
sunyiming 1:6465a3f5c58a 103
sunyiming 1:6465a3f5c58a 104 #ifdef PPPOE_SERVER
sunyiming 1:6465a3f5c58a 105 #error "PPPOE_SERVER is not yet supported under lwIP!"
sunyiming 1:6465a3f5c58a 106 /* from if_spppsubr.c */
sunyiming 1:6465a3f5c58a 107 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
sunyiming 1:6465a3f5c58a 108 #endif
sunyiming 1:6465a3f5c58a 109
sunyiming 1:6465a3f5c58a 110 #ifndef PPPOE_ERRORSTRING_LEN
sunyiming 1:6465a3f5c58a 111 #define PPPOE_ERRORSTRING_LEN 64
sunyiming 1:6465a3f5c58a 112 #endif
sunyiming 1:6465a3f5c58a 113 static char pppoe_error_tmp[PPPOE_ERRORSTRING_LEN];
sunyiming 1:6465a3f5c58a 114
sunyiming 1:6465a3f5c58a 115
sunyiming 1:6465a3f5c58a 116 /* input routines */
sunyiming 1:6465a3f5c58a 117 static void pppoe_dispatch_disc_pkt(struct netif *, struct pbuf *);
sunyiming 1:6465a3f5c58a 118
sunyiming 1:6465a3f5c58a 119 /* management routines */
sunyiming 1:6465a3f5c58a 120 static int pppoe_do_disconnect(struct pppoe_softc *);
sunyiming 1:6465a3f5c58a 121 static void pppoe_abort_connect(struct pppoe_softc *);
sunyiming 1:6465a3f5c58a 122 static void pppoe_clear_softc(struct pppoe_softc *, const char *);
sunyiming 1:6465a3f5c58a 123
sunyiming 1:6465a3f5c58a 124 /* internal timeout handling */
sunyiming 1:6465a3f5c58a 125 static void pppoe_timeout(void *);
sunyiming 1:6465a3f5c58a 126
sunyiming 1:6465a3f5c58a 127 /* sending actual protocol controll packets */
sunyiming 1:6465a3f5c58a 128 static err_t pppoe_send_padi(struct pppoe_softc *);
sunyiming 1:6465a3f5c58a 129 static err_t pppoe_send_padr(struct pppoe_softc *);
sunyiming 1:6465a3f5c58a 130 #ifdef PPPOE_SERVER
sunyiming 1:6465a3f5c58a 131 static err_t pppoe_send_pado(struct pppoe_softc *);
sunyiming 1:6465a3f5c58a 132 static err_t pppoe_send_pads(struct pppoe_softc *);
sunyiming 1:6465a3f5c58a 133 #endif
sunyiming 1:6465a3f5c58a 134 static err_t pppoe_send_padt(struct netif *, u_int, const u8_t *);
sunyiming 1:6465a3f5c58a 135
sunyiming 1:6465a3f5c58a 136 /* internal helper functions */
sunyiming 1:6465a3f5c58a 137 static struct pppoe_softc * pppoe_find_softc_by_session(u_int, struct netif *);
sunyiming 1:6465a3f5c58a 138 static struct pppoe_softc * pppoe_find_softc_by_hunique(u8_t *, size_t, struct netif *);
sunyiming 1:6465a3f5c58a 139
sunyiming 1:6465a3f5c58a 140 /** linked list of created pppoe interfaces */
sunyiming 1:6465a3f5c58a 141 static struct pppoe_softc *pppoe_softc_list;
sunyiming 1:6465a3f5c58a 142
sunyiming 1:6465a3f5c58a 143 err_t
sunyiming 1:6465a3f5c58a 144 pppoe_create(struct netif *ethif, int pd, void (*linkStatusCB)(int pd, int up), struct pppoe_softc **scptr)
sunyiming 1:6465a3f5c58a 145 {
sunyiming 1:6465a3f5c58a 146 struct pppoe_softc *sc;
sunyiming 1:6465a3f5c58a 147
sunyiming 1:6465a3f5c58a 148 sc = (struct pppoe_softc *)memp_malloc(MEMP_PPPOE_IF);
sunyiming 1:6465a3f5c58a 149 if (sc == NULL) {
sunyiming 1:6465a3f5c58a 150 *scptr = NULL;
sunyiming 1:6465a3f5c58a 151 return ERR_MEM;
sunyiming 1:6465a3f5c58a 152 }
sunyiming 1:6465a3f5c58a 153 memset(sc, 0, sizeof(struct pppoe_softc));
sunyiming 1:6465a3f5c58a 154
sunyiming 1:6465a3f5c58a 155 /* changed to real address later */
sunyiming 1:6465a3f5c58a 156 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
sunyiming 1:6465a3f5c58a 157
sunyiming 1:6465a3f5c58a 158 sc->sc_pd = pd;
sunyiming 1:6465a3f5c58a 159 sc->sc_linkStatusCB = linkStatusCB;
sunyiming 1:6465a3f5c58a 160 sc->sc_ethif = ethif;
sunyiming 1:6465a3f5c58a 161
sunyiming 1:6465a3f5c58a 162 /* put the new interface at the head of the list */
sunyiming 1:6465a3f5c58a 163 sc->next = pppoe_softc_list;
sunyiming 1:6465a3f5c58a 164 pppoe_softc_list = sc;
sunyiming 1:6465a3f5c58a 165
sunyiming 1:6465a3f5c58a 166 *scptr = sc;
sunyiming 1:6465a3f5c58a 167
sunyiming 1:6465a3f5c58a 168 return ERR_OK;
sunyiming 1:6465a3f5c58a 169 }
sunyiming 1:6465a3f5c58a 170
sunyiming 1:6465a3f5c58a 171 err_t
sunyiming 1:6465a3f5c58a 172 pppoe_destroy(struct netif *ifp)
sunyiming 1:6465a3f5c58a 173 {
sunyiming 1:6465a3f5c58a 174 struct pppoe_softc *sc, *prev = NULL;
sunyiming 1:6465a3f5c58a 175
sunyiming 1:6465a3f5c58a 176 for (sc = pppoe_softc_list; sc != NULL; prev = sc, sc = sc->next) {
sunyiming 1:6465a3f5c58a 177 if (sc->sc_ethif == ifp) {
sunyiming 1:6465a3f5c58a 178 break;
sunyiming 1:6465a3f5c58a 179 }
sunyiming 1:6465a3f5c58a 180 }
sunyiming 1:6465a3f5c58a 181
sunyiming 1:6465a3f5c58a 182 if(!(sc && (sc->sc_ethif == ifp))) {
sunyiming 1:6465a3f5c58a 183 return ERR_IF;
sunyiming 1:6465a3f5c58a 184 }
sunyiming 1:6465a3f5c58a 185
sunyiming 1:6465a3f5c58a 186 sys_untimeout(pppoe_timeout, sc);
sunyiming 1:6465a3f5c58a 187 if (prev == NULL) {
sunyiming 1:6465a3f5c58a 188 /* remove sc from the head of the list */
sunyiming 1:6465a3f5c58a 189 pppoe_softc_list = sc->next;
sunyiming 1:6465a3f5c58a 190 } else {
sunyiming 1:6465a3f5c58a 191 /* remove sc from the list */
sunyiming 1:6465a3f5c58a 192 prev->next = sc->next;
sunyiming 1:6465a3f5c58a 193 }
sunyiming 1:6465a3f5c58a 194
sunyiming 1:6465a3f5c58a 195 #ifdef PPPOE_TODO
sunyiming 1:6465a3f5c58a 196 if (sc->sc_concentrator_name) {
sunyiming 1:6465a3f5c58a 197 mem_free(sc->sc_concentrator_name);
sunyiming 1:6465a3f5c58a 198 }
sunyiming 1:6465a3f5c58a 199 if (sc->sc_service_name) {
sunyiming 1:6465a3f5c58a 200 mem_free(sc->sc_service_name);
sunyiming 1:6465a3f5c58a 201 }
sunyiming 1:6465a3f5c58a 202 #endif /* PPPOE_TODO */
sunyiming 1:6465a3f5c58a 203 memp_free(MEMP_PPPOE_IF, sc);
sunyiming 1:6465a3f5c58a 204
sunyiming 1:6465a3f5c58a 205 return ERR_OK;
sunyiming 1:6465a3f5c58a 206 }
sunyiming 1:6465a3f5c58a 207
sunyiming 1:6465a3f5c58a 208 /*
sunyiming 1:6465a3f5c58a 209 * Find the interface handling the specified session.
sunyiming 1:6465a3f5c58a 210 * Note: O(number of sessions open), this is a client-side only, mean
sunyiming 1:6465a3f5c58a 211 * and lean implementation, so number of open sessions typically should
sunyiming 1:6465a3f5c58a 212 * be 1.
sunyiming 1:6465a3f5c58a 213 */
sunyiming 1:6465a3f5c58a 214 static struct pppoe_softc *
sunyiming 1:6465a3f5c58a 215 pppoe_find_softc_by_session(u_int session, struct netif *rcvif)
sunyiming 1:6465a3f5c58a 216 {
sunyiming 1:6465a3f5c58a 217 struct pppoe_softc *sc;
sunyiming 1:6465a3f5c58a 218
sunyiming 1:6465a3f5c58a 219 if (session == 0) {
sunyiming 1:6465a3f5c58a 220 return NULL;
sunyiming 1:6465a3f5c58a 221 }
sunyiming 1:6465a3f5c58a 222
sunyiming 1:6465a3f5c58a 223 for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
sunyiming 1:6465a3f5c58a 224 if (sc->sc_state == PPPOE_STATE_SESSION
sunyiming 1:6465a3f5c58a 225 && sc->sc_session == session) {
sunyiming 1:6465a3f5c58a 226 if (sc->sc_ethif == rcvif) {
sunyiming 1:6465a3f5c58a 227 return sc;
sunyiming 1:6465a3f5c58a 228 } else {
sunyiming 1:6465a3f5c58a 229 return NULL;
sunyiming 1:6465a3f5c58a 230 }
sunyiming 1:6465a3f5c58a 231 }
sunyiming 1:6465a3f5c58a 232 }
sunyiming 1:6465a3f5c58a 233 return NULL;
sunyiming 1:6465a3f5c58a 234 }
sunyiming 1:6465a3f5c58a 235
sunyiming 1:6465a3f5c58a 236 /* Check host unique token passed and return appropriate softc pointer,
sunyiming 1:6465a3f5c58a 237 * or NULL if token is bogus. */
sunyiming 1:6465a3f5c58a 238 static struct pppoe_softc *
sunyiming 1:6465a3f5c58a 239 pppoe_find_softc_by_hunique(u8_t *token, size_t len, struct netif *rcvif)
sunyiming 1:6465a3f5c58a 240 {
sunyiming 1:6465a3f5c58a 241 struct pppoe_softc *sc, *t;
sunyiming 1:6465a3f5c58a 242
sunyiming 1:6465a3f5c58a 243 if (pppoe_softc_list == NULL) {
sunyiming 1:6465a3f5c58a 244 return NULL;
sunyiming 1:6465a3f5c58a 245 }
sunyiming 1:6465a3f5c58a 246
sunyiming 1:6465a3f5c58a 247 if (len != sizeof sc) {
sunyiming 1:6465a3f5c58a 248 return NULL;
sunyiming 1:6465a3f5c58a 249 }
sunyiming 1:6465a3f5c58a 250 MEMCPY(&t, token, len);
sunyiming 1:6465a3f5c58a 251
sunyiming 1:6465a3f5c58a 252 for (sc = pppoe_softc_list; sc != NULL; sc = sc->next) {
sunyiming 1:6465a3f5c58a 253 if (sc == t) {
sunyiming 1:6465a3f5c58a 254 break;
sunyiming 1:6465a3f5c58a 255 }
sunyiming 1:6465a3f5c58a 256 }
sunyiming 1:6465a3f5c58a 257
sunyiming 1:6465a3f5c58a 258 if (sc == NULL) {
sunyiming 1:6465a3f5c58a 259 PPPDEBUG(LOG_DEBUG, ("pppoe: alien host unique tag, no session found\n"));
sunyiming 1:6465a3f5c58a 260 return NULL;
sunyiming 1:6465a3f5c58a 261 }
sunyiming 1:6465a3f5c58a 262
sunyiming 1:6465a3f5c58a 263 /* should be safe to access *sc now */
sunyiming 1:6465a3f5c58a 264 if (sc->sc_state < PPPOE_STATE_PADI_SENT || sc->sc_state >= PPPOE_STATE_SESSION) {
sunyiming 1:6465a3f5c58a 265 printf("%c%c%"U16_F": host unique tag found, but it belongs to a connection in state %d\n",
sunyiming 1:6465a3f5c58a 266 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_state);
sunyiming 1:6465a3f5c58a 267 return NULL;
sunyiming 1:6465a3f5c58a 268 }
sunyiming 1:6465a3f5c58a 269 if (sc->sc_ethif != rcvif) {
sunyiming 1:6465a3f5c58a 270 printf("%c%c%"U16_F": wrong interface, not accepting host unique\n",
sunyiming 1:6465a3f5c58a 271 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
sunyiming 1:6465a3f5c58a 272 return NULL;
sunyiming 1:6465a3f5c58a 273 }
sunyiming 1:6465a3f5c58a 274 return sc;
sunyiming 1:6465a3f5c58a 275 }
sunyiming 1:6465a3f5c58a 276
sunyiming 1:6465a3f5c58a 277 static void
sunyiming 1:6465a3f5c58a 278 pppoe_linkstatus_up(struct pppoe_softc *sc)
sunyiming 1:6465a3f5c58a 279 {
sunyiming 1:6465a3f5c58a 280 sc->sc_linkStatusCB(sc->sc_pd, 1);
sunyiming 1:6465a3f5c58a 281 }
sunyiming 1:6465a3f5c58a 282
sunyiming 1:6465a3f5c58a 283 /* analyze and handle a single received packet while not in session state */
sunyiming 1:6465a3f5c58a 284 static void
sunyiming 1:6465a3f5c58a 285 pppoe_dispatch_disc_pkt(struct netif *netif, struct pbuf *pb)
sunyiming 1:6465a3f5c58a 286 {
sunyiming 1:6465a3f5c58a 287 u16_t tag, len;
sunyiming 1:6465a3f5c58a 288 u16_t session, plen;
sunyiming 1:6465a3f5c58a 289 struct pppoe_softc *sc;
sunyiming 1:6465a3f5c58a 290 const char *err_msg;
sunyiming 1:6465a3f5c58a 291 char devname[6];
sunyiming 1:6465a3f5c58a 292 u8_t *ac_cookie;
sunyiming 1:6465a3f5c58a 293 u16_t ac_cookie_len;
sunyiming 1:6465a3f5c58a 294 #ifdef PPPOE_SERVER
sunyiming 1:6465a3f5c58a 295 u8_t *hunique;
sunyiming 1:6465a3f5c58a 296 size_t hunique_len;
sunyiming 1:6465a3f5c58a 297 #endif
sunyiming 1:6465a3f5c58a 298 struct pppoehdr *ph;
sunyiming 1:6465a3f5c58a 299 struct pppoetag pt;
sunyiming 1:6465a3f5c58a 300 int off, err, errortag;
sunyiming 1:6465a3f5c58a 301 struct eth_hdr *ethhdr;
sunyiming 1:6465a3f5c58a 302
sunyiming 1:6465a3f5c58a 303 pb = pppSingleBuf(pb);
sunyiming 1:6465a3f5c58a 304
sunyiming 1:6465a3f5c58a 305 strcpy(devname, "pppoe"); /* as long as we don't know which instance */
sunyiming 1:6465a3f5c58a 306 err_msg = NULL;
sunyiming 1:6465a3f5c58a 307 errortag = 0;
sunyiming 1:6465a3f5c58a 308 if (pb->len < sizeof(*ethhdr)) {
sunyiming 1:6465a3f5c58a 309 goto done;
sunyiming 1:6465a3f5c58a 310 }
sunyiming 1:6465a3f5c58a 311 ethhdr = (struct eth_hdr *)pb->payload;
sunyiming 1:6465a3f5c58a 312 off = sizeof(*ethhdr);
sunyiming 1:6465a3f5c58a 313
sunyiming 1:6465a3f5c58a 314 ac_cookie = NULL;
sunyiming 1:6465a3f5c58a 315 ac_cookie_len = 0;
sunyiming 1:6465a3f5c58a 316 #ifdef PPPOE_SERVER
sunyiming 1:6465a3f5c58a 317 hunique = NULL;
sunyiming 1:6465a3f5c58a 318 hunique_len = 0;
sunyiming 1:6465a3f5c58a 319 #endif
sunyiming 1:6465a3f5c58a 320 session = 0;
sunyiming 1:6465a3f5c58a 321 if (pb->len - off < PPPOE_HEADERLEN) {
sunyiming 1:6465a3f5c58a 322 printf("pppoe: packet too short: %d\n", pb->len);
sunyiming 1:6465a3f5c58a 323 goto done;
sunyiming 1:6465a3f5c58a 324 }
sunyiming 1:6465a3f5c58a 325
sunyiming 1:6465a3f5c58a 326 ph = (struct pppoehdr *) (ethhdr + 1);
sunyiming 1:6465a3f5c58a 327 if (ph->vertype != PPPOE_VERTYPE) {
sunyiming 1:6465a3f5c58a 328 printf("pppoe: unknown version/type packet: 0x%x\n", ph->vertype);
sunyiming 1:6465a3f5c58a 329 goto done;
sunyiming 1:6465a3f5c58a 330 }
sunyiming 1:6465a3f5c58a 331 session = ntohs(ph->session);
sunyiming 1:6465a3f5c58a 332 plen = ntohs(ph->plen);
sunyiming 1:6465a3f5c58a 333 off += sizeof(*ph);
sunyiming 1:6465a3f5c58a 334
sunyiming 1:6465a3f5c58a 335 if (plen + off > pb->len) {
sunyiming 1:6465a3f5c58a 336 printf("pppoe: packet content does not fit: data available = %d, packet size = %u\n",
sunyiming 1:6465a3f5c58a 337 pb->len - off, plen);
sunyiming 1:6465a3f5c58a 338 goto done;
sunyiming 1:6465a3f5c58a 339 }
sunyiming 1:6465a3f5c58a 340 if(pb->tot_len == pb->len) {
sunyiming 1:6465a3f5c58a 341 pb->tot_len = pb->len = (u16_t)off + plen; /* ignore trailing garbage */
sunyiming 1:6465a3f5c58a 342 }
sunyiming 1:6465a3f5c58a 343 tag = 0;
sunyiming 1:6465a3f5c58a 344 len = 0;
sunyiming 1:6465a3f5c58a 345 sc = NULL;
sunyiming 1:6465a3f5c58a 346 while (off + sizeof(pt) <= pb->len) {
sunyiming 1:6465a3f5c58a 347 MEMCPY(&pt, (u8_t*)pb->payload + off, sizeof(pt));
sunyiming 1:6465a3f5c58a 348 tag = ntohs(pt.tag);
sunyiming 1:6465a3f5c58a 349 len = ntohs(pt.len);
sunyiming 1:6465a3f5c58a 350 if (off + sizeof(pt) + len > pb->len) {
sunyiming 1:6465a3f5c58a 351 printf("pppoe: tag 0x%x len 0x%x is too long\n", tag, len);
sunyiming 1:6465a3f5c58a 352 goto done;
sunyiming 1:6465a3f5c58a 353 }
sunyiming 1:6465a3f5c58a 354 switch (tag) {
sunyiming 1:6465a3f5c58a 355 case PPPOE_TAG_EOL:
sunyiming 1:6465a3f5c58a 356 goto breakbreak;
sunyiming 1:6465a3f5c58a 357 case PPPOE_TAG_SNAME:
sunyiming 1:6465a3f5c58a 358 break; /* ignored */
sunyiming 1:6465a3f5c58a 359 case PPPOE_TAG_ACNAME:
sunyiming 1:6465a3f5c58a 360 break; /* ignored */
sunyiming 1:6465a3f5c58a 361 case PPPOE_TAG_HUNIQUE:
sunyiming 1:6465a3f5c58a 362 if (sc != NULL) {
sunyiming 1:6465a3f5c58a 363 break;
sunyiming 1:6465a3f5c58a 364 }
sunyiming 1:6465a3f5c58a 365 #ifdef PPPOE_SERVER
sunyiming 1:6465a3f5c58a 366 hunique = (u8_t*)pb->payload + off + sizeof(pt);
sunyiming 1:6465a3f5c58a 367 hunique_len = len;
sunyiming 1:6465a3f5c58a 368 #endif
sunyiming 1:6465a3f5c58a 369 sc = pppoe_find_softc_by_hunique((u8_t*)pb->payload + off + sizeof(pt), len, netif);
sunyiming 1:6465a3f5c58a 370 if (sc != NULL) {
sunyiming 1:6465a3f5c58a 371 snprintf(devname, sizeof(devname), "%c%c%"U16_F, sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
sunyiming 1:6465a3f5c58a 372 }
sunyiming 1:6465a3f5c58a 373 break;
sunyiming 1:6465a3f5c58a 374 case PPPOE_TAG_ACCOOKIE:
sunyiming 1:6465a3f5c58a 375 if (ac_cookie == NULL) {
sunyiming 1:6465a3f5c58a 376 ac_cookie = (u8_t*)pb->payload + off + sizeof(pt);
sunyiming 1:6465a3f5c58a 377 ac_cookie_len = len;
sunyiming 1:6465a3f5c58a 378 }
sunyiming 1:6465a3f5c58a 379 break;
sunyiming 1:6465a3f5c58a 380 case PPPOE_TAG_SNAME_ERR:
sunyiming 1:6465a3f5c58a 381 err_msg = "SERVICE NAME ERROR";
sunyiming 1:6465a3f5c58a 382 errortag = 1;
sunyiming 1:6465a3f5c58a 383 break;
sunyiming 1:6465a3f5c58a 384 case PPPOE_TAG_ACSYS_ERR:
sunyiming 1:6465a3f5c58a 385 err_msg = "AC SYSTEM ERROR";
sunyiming 1:6465a3f5c58a 386 errortag = 1;
sunyiming 1:6465a3f5c58a 387 break;
sunyiming 1:6465a3f5c58a 388 case PPPOE_TAG_GENERIC_ERR:
sunyiming 1:6465a3f5c58a 389 err_msg = "GENERIC ERROR";
sunyiming 1:6465a3f5c58a 390 errortag = 1;
sunyiming 1:6465a3f5c58a 391 break;
sunyiming 1:6465a3f5c58a 392 }
sunyiming 1:6465a3f5c58a 393 if (err_msg) {
sunyiming 1:6465a3f5c58a 394 if (errortag && len) {
sunyiming 1:6465a3f5c58a 395 u16_t error_len = LWIP_MIN(len, sizeof(pppoe_error_tmp)-1);
sunyiming 1:6465a3f5c58a 396 strncpy(pppoe_error_tmp, (char*)pb->payload + off + sizeof(pt), error_len);
sunyiming 1:6465a3f5c58a 397 pppoe_error_tmp[error_len-1] = '\0';
sunyiming 1:6465a3f5c58a 398 printf("%s: %s: %s\n", devname, err_msg, pppoe_error_tmp);
sunyiming 1:6465a3f5c58a 399 } else {
sunyiming 1:6465a3f5c58a 400 printf("%s: %s\n", devname, err_msg);
sunyiming 1:6465a3f5c58a 401 }
sunyiming 1:6465a3f5c58a 402 if (errortag) {
sunyiming 1:6465a3f5c58a 403 goto done;
sunyiming 1:6465a3f5c58a 404 }
sunyiming 1:6465a3f5c58a 405 }
sunyiming 1:6465a3f5c58a 406 off += sizeof(pt) + len;
sunyiming 1:6465a3f5c58a 407 }
sunyiming 1:6465a3f5c58a 408
sunyiming 1:6465a3f5c58a 409 breakbreak:;
sunyiming 1:6465a3f5c58a 410 switch (ph->code) {
sunyiming 1:6465a3f5c58a 411 case PPPOE_CODE_PADI:
sunyiming 1:6465a3f5c58a 412 #ifdef PPPOE_SERVER
sunyiming 1:6465a3f5c58a 413 /*
sunyiming 1:6465a3f5c58a 414 * got service name, concentrator name, and/or host unique.
sunyiming 1:6465a3f5c58a 415 * ignore if we have no interfaces with IFF_PASSIVE|IFF_UP.
sunyiming 1:6465a3f5c58a 416 */
sunyiming 1:6465a3f5c58a 417 if (LIST_EMPTY(&pppoe_softc_list)) {
sunyiming 1:6465a3f5c58a 418 goto done;
sunyiming 1:6465a3f5c58a 419 }
sunyiming 1:6465a3f5c58a 420 LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
sunyiming 1:6465a3f5c58a 421 if (!(sc->sc_sppp.pp_if.if_flags & IFF_UP)) {
sunyiming 1:6465a3f5c58a 422 continue;
sunyiming 1:6465a3f5c58a 423 }
sunyiming 1:6465a3f5c58a 424 if (!(sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
sunyiming 1:6465a3f5c58a 425 continue;
sunyiming 1:6465a3f5c58a 426 }
sunyiming 1:6465a3f5c58a 427 if (sc->sc_state == PPPOE_STATE_INITIAL) {
sunyiming 1:6465a3f5c58a 428 break;
sunyiming 1:6465a3f5c58a 429 }
sunyiming 1:6465a3f5c58a 430 }
sunyiming 1:6465a3f5c58a 431 if (sc == NULL) {
sunyiming 1:6465a3f5c58a 432 /* printf("pppoe: free passive interface is not found\n"); */
sunyiming 1:6465a3f5c58a 433 goto done;
sunyiming 1:6465a3f5c58a 434 }
sunyiming 1:6465a3f5c58a 435 if (hunique) {
sunyiming 1:6465a3f5c58a 436 if (sc->sc_hunique) {
sunyiming 1:6465a3f5c58a 437 mem_free(sc->sc_hunique);
sunyiming 1:6465a3f5c58a 438 }
sunyiming 1:6465a3f5c58a 439 sc->sc_hunique = mem_malloc(hunique_len);
sunyiming 1:6465a3f5c58a 440 if (sc->sc_hunique == NULL) {
sunyiming 1:6465a3f5c58a 441 goto done;
sunyiming 1:6465a3f5c58a 442 }
sunyiming 1:6465a3f5c58a 443 sc->sc_hunique_len = hunique_len;
sunyiming 1:6465a3f5c58a 444 MEMCPY(sc->sc_hunique, hunique, hunique_len);
sunyiming 1:6465a3f5c58a 445 }
sunyiming 1:6465a3f5c58a 446 MEMCPY(&sc->sc_dest, eh->ether_shost, sizeof sc->sc_dest);
sunyiming 1:6465a3f5c58a 447 sc->sc_state = PPPOE_STATE_PADO_SENT;
sunyiming 1:6465a3f5c58a 448 pppoe_send_pado(sc);
sunyiming 1:6465a3f5c58a 449 break;
sunyiming 1:6465a3f5c58a 450 #endif /* PPPOE_SERVER */
sunyiming 1:6465a3f5c58a 451 case PPPOE_CODE_PADR:
sunyiming 1:6465a3f5c58a 452 #ifdef PPPOE_SERVER
sunyiming 1:6465a3f5c58a 453 /*
sunyiming 1:6465a3f5c58a 454 * get sc from ac_cookie if IFF_PASSIVE
sunyiming 1:6465a3f5c58a 455 */
sunyiming 1:6465a3f5c58a 456 if (ac_cookie == NULL) {
sunyiming 1:6465a3f5c58a 457 /* be quiet if there is not a single pppoe instance */
sunyiming 1:6465a3f5c58a 458 printf("pppoe: received PADR but not includes ac_cookie\n");
sunyiming 1:6465a3f5c58a 459 goto done;
sunyiming 1:6465a3f5c58a 460 }
sunyiming 1:6465a3f5c58a 461 sc = pppoe_find_softc_by_hunique(ac_cookie, ac_cookie_len, netif);
sunyiming 1:6465a3f5c58a 462 if (sc == NULL) {
sunyiming 1:6465a3f5c58a 463 /* be quiet if there is not a single pppoe instance */
sunyiming 1:6465a3f5c58a 464 if (!LIST_EMPTY(&pppoe_softc_list)) {
sunyiming 1:6465a3f5c58a 465 printf("pppoe: received PADR but could not find request for it\n");
sunyiming 1:6465a3f5c58a 466 }
sunyiming 1:6465a3f5c58a 467 goto done;
sunyiming 1:6465a3f5c58a 468 }
sunyiming 1:6465a3f5c58a 469 if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
sunyiming 1:6465a3f5c58a 470 printf("%c%c%"U16_F": received unexpected PADR\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
sunyiming 1:6465a3f5c58a 471 goto done;
sunyiming 1:6465a3f5c58a 472 }
sunyiming 1:6465a3f5c58a 473 if (hunique) {
sunyiming 1:6465a3f5c58a 474 if (sc->sc_hunique) {
sunyiming 1:6465a3f5c58a 475 mem_free(sc->sc_hunique);
sunyiming 1:6465a3f5c58a 476 }
sunyiming 1:6465a3f5c58a 477 sc->sc_hunique = mem_malloc(hunique_len);
sunyiming 1:6465a3f5c58a 478 if (sc->sc_hunique == NULL) {
sunyiming 1:6465a3f5c58a 479 goto done;
sunyiming 1:6465a3f5c58a 480 }
sunyiming 1:6465a3f5c58a 481 sc->sc_hunique_len = hunique_len;
sunyiming 1:6465a3f5c58a 482 MEMCPY(sc->sc_hunique, hunique, hunique_len);
sunyiming 1:6465a3f5c58a 483 }
sunyiming 1:6465a3f5c58a 484 pppoe_send_pads(sc);
sunyiming 1:6465a3f5c58a 485 sc->sc_state = PPPOE_STATE_SESSION;
sunyiming 1:6465a3f5c58a 486 pppoe_linkstatus_up(sc); /* notify upper layers */
sunyiming 1:6465a3f5c58a 487 break;
sunyiming 1:6465a3f5c58a 488 #else
sunyiming 1:6465a3f5c58a 489 /* ignore, we are no access concentrator */
sunyiming 1:6465a3f5c58a 490 goto done;
sunyiming 1:6465a3f5c58a 491 #endif /* PPPOE_SERVER */
sunyiming 1:6465a3f5c58a 492 case PPPOE_CODE_PADO:
sunyiming 1:6465a3f5c58a 493 if (sc == NULL) {
sunyiming 1:6465a3f5c58a 494 /* be quiet if there is not a single pppoe instance */
sunyiming 1:6465a3f5c58a 495 if (pppoe_softc_list != NULL) {
sunyiming 1:6465a3f5c58a 496 printf("pppoe: received PADO but could not find request for it\n");
sunyiming 1:6465a3f5c58a 497 }
sunyiming 1:6465a3f5c58a 498 goto done;
sunyiming 1:6465a3f5c58a 499 }
sunyiming 1:6465a3f5c58a 500 if (sc->sc_state != PPPOE_STATE_PADI_SENT) {
sunyiming 1:6465a3f5c58a 501 printf("%c%c%"U16_F": received unexpected PADO\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
sunyiming 1:6465a3f5c58a 502 goto done;
sunyiming 1:6465a3f5c58a 503 }
sunyiming 1:6465a3f5c58a 504 if (ac_cookie) {
sunyiming 1:6465a3f5c58a 505 sc->sc_ac_cookie_len = ac_cookie_len;
sunyiming 1:6465a3f5c58a 506 MEMCPY(sc->sc_ac_cookie, ac_cookie, ac_cookie_len);
sunyiming 1:6465a3f5c58a 507 }
sunyiming 1:6465a3f5c58a 508 MEMCPY(&sc->sc_dest, ethhdr->src.addr, sizeof(sc->sc_dest.addr));
sunyiming 1:6465a3f5c58a 509 sys_untimeout(pppoe_timeout, sc);
sunyiming 1:6465a3f5c58a 510 sc->sc_padr_retried = 0;
sunyiming 1:6465a3f5c58a 511 sc->sc_state = PPPOE_STATE_PADR_SENT;
sunyiming 1:6465a3f5c58a 512 if ((err = pppoe_send_padr(sc)) != 0) {
sunyiming 1:6465a3f5c58a 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));
sunyiming 1:6465a3f5c58a 514 }
sunyiming 1:6465a3f5c58a 515 sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
sunyiming 1:6465a3f5c58a 516 break;
sunyiming 1:6465a3f5c58a 517 case PPPOE_CODE_PADS:
sunyiming 1:6465a3f5c58a 518 if (sc == NULL) {
sunyiming 1:6465a3f5c58a 519 goto done;
sunyiming 1:6465a3f5c58a 520 }
sunyiming 1:6465a3f5c58a 521 sc->sc_session = session;
sunyiming 1:6465a3f5c58a 522 sys_untimeout(pppoe_timeout, sc);
sunyiming 1:6465a3f5c58a 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));
sunyiming 1:6465a3f5c58a 524 sc->sc_state = PPPOE_STATE_SESSION;
sunyiming 1:6465a3f5c58a 525 pppoe_linkstatus_up(sc); /* notify upper layers */
sunyiming 1:6465a3f5c58a 526 break;
sunyiming 1:6465a3f5c58a 527 case PPPOE_CODE_PADT:
sunyiming 1:6465a3f5c58a 528 if (sc == NULL) {
sunyiming 1:6465a3f5c58a 529 goto done;
sunyiming 1:6465a3f5c58a 530 }
sunyiming 1:6465a3f5c58a 531 pppoe_clear_softc(sc, "received PADT");
sunyiming 1:6465a3f5c58a 532 break;
sunyiming 1:6465a3f5c58a 533 default:
sunyiming 1:6465a3f5c58a 534 if(sc) {
sunyiming 1:6465a3f5c58a 535 printf("%c%c%"U16_F": unknown code (0x%"X16_F") session = 0x%"X16_F"\n",
sunyiming 1:6465a3f5c58a 536 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
sunyiming 1:6465a3f5c58a 537 (u16_t)ph->code, session);
sunyiming 1:6465a3f5c58a 538 } else {
sunyiming 1:6465a3f5c58a 539 printf("pppoe: unknown code (0x%"X16_F") session = 0x%"X16_F"\n", (u16_t)ph->code, session);
sunyiming 1:6465a3f5c58a 540 }
sunyiming 1:6465a3f5c58a 541 break;
sunyiming 1:6465a3f5c58a 542 }
sunyiming 1:6465a3f5c58a 543
sunyiming 1:6465a3f5c58a 544 done:
sunyiming 1:6465a3f5c58a 545 pbuf_free(pb);
sunyiming 1:6465a3f5c58a 546 return;
sunyiming 1:6465a3f5c58a 547 }
sunyiming 1:6465a3f5c58a 548
sunyiming 1:6465a3f5c58a 549 void
sunyiming 1:6465a3f5c58a 550 pppoe_disc_input(struct netif *netif, struct pbuf *p)
sunyiming 1:6465a3f5c58a 551 {
sunyiming 1:6465a3f5c58a 552 /* avoid error messages if there is not a single pppoe instance */
sunyiming 1:6465a3f5c58a 553 if (pppoe_softc_list != NULL) {
sunyiming 1:6465a3f5c58a 554 pppoe_dispatch_disc_pkt(netif, p);
sunyiming 1:6465a3f5c58a 555 } else {
sunyiming 1:6465a3f5c58a 556 pbuf_free(p);
sunyiming 1:6465a3f5c58a 557 }
sunyiming 1:6465a3f5c58a 558 }
sunyiming 1:6465a3f5c58a 559
sunyiming 1:6465a3f5c58a 560 void
sunyiming 1:6465a3f5c58a 561 pppoe_data_input(struct netif *netif, struct pbuf *pb)
sunyiming 1:6465a3f5c58a 562 {
sunyiming 1:6465a3f5c58a 563 u16_t session, plen;
sunyiming 1:6465a3f5c58a 564 struct pppoe_softc *sc;
sunyiming 1:6465a3f5c58a 565 struct pppoehdr *ph;
sunyiming 1:6465a3f5c58a 566 #ifdef PPPOE_TERM_UNKNOWN_SESSIONS
sunyiming 1:6465a3f5c58a 567 u8_t shost[ETHER_ADDR_LEN];
sunyiming 1:6465a3f5c58a 568 #endif
sunyiming 1:6465a3f5c58a 569
sunyiming 1:6465a3f5c58a 570 #ifdef PPPOE_TERM_UNKNOWN_SESSIONS
sunyiming 1:6465a3f5c58a 571 MEMCPY(shost, ((struct eth_hdr *)pb->payload)->src.addr, sizeof(shost));
sunyiming 1:6465a3f5c58a 572 #endif
sunyiming 1:6465a3f5c58a 573 if (pbuf_header(pb, -(int)sizeof(struct eth_hdr)) != 0) {
sunyiming 1:6465a3f5c58a 574 /* bail out */
sunyiming 1:6465a3f5c58a 575 PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header failed\n"));
sunyiming 1:6465a3f5c58a 576 LINK_STATS_INC(link.lenerr);
sunyiming 1:6465a3f5c58a 577 goto drop;
sunyiming 1:6465a3f5c58a 578 }
sunyiming 1:6465a3f5c58a 579
sunyiming 1:6465a3f5c58a 580 pb = pppSingleBuf (pb);
sunyiming 1:6465a3f5c58a 581
sunyiming 1:6465a3f5c58a 582 if (pb->len <= PPPOE_HEADERLEN) {
sunyiming 1:6465a3f5c58a 583 printf("pppoe (data): dropping too short packet: %d bytes\n", pb->len);
sunyiming 1:6465a3f5c58a 584 goto drop;
sunyiming 1:6465a3f5c58a 585 }
sunyiming 1:6465a3f5c58a 586
sunyiming 1:6465a3f5c58a 587 if (pb->len < sizeof(*ph)) {
sunyiming 1:6465a3f5c58a 588 printf("pppoe_data_input: could not get PPPoE header\n");
sunyiming 1:6465a3f5c58a 589 goto drop;
sunyiming 1:6465a3f5c58a 590 }
sunyiming 1:6465a3f5c58a 591 ph = (struct pppoehdr *)pb->payload;
sunyiming 1:6465a3f5c58a 592
sunyiming 1:6465a3f5c58a 593 if (ph->vertype != PPPOE_VERTYPE) {
sunyiming 1:6465a3f5c58a 594 printf("pppoe (data): unknown version/type packet: 0x%x\n", ph->vertype);
sunyiming 1:6465a3f5c58a 595 goto drop;
sunyiming 1:6465a3f5c58a 596 }
sunyiming 1:6465a3f5c58a 597 if (ph->code != 0) {
sunyiming 1:6465a3f5c58a 598 goto drop;
sunyiming 1:6465a3f5c58a 599 }
sunyiming 1:6465a3f5c58a 600
sunyiming 1:6465a3f5c58a 601 session = ntohs(ph->session);
sunyiming 1:6465a3f5c58a 602 sc = pppoe_find_softc_by_session(session, netif);
sunyiming 1:6465a3f5c58a 603 if (sc == NULL) {
sunyiming 1:6465a3f5c58a 604 #ifdef PPPOE_TERM_UNKNOWN_SESSIONS
sunyiming 1:6465a3f5c58a 605 printf("pppoe: input for unknown session 0x%x, sending PADT\n", session);
sunyiming 1:6465a3f5c58a 606 pppoe_send_padt(netif, session, shost);
sunyiming 1:6465a3f5c58a 607 #endif
sunyiming 1:6465a3f5c58a 608 goto drop;
sunyiming 1:6465a3f5c58a 609 }
sunyiming 1:6465a3f5c58a 610
sunyiming 1:6465a3f5c58a 611 plen = ntohs(ph->plen);
sunyiming 1:6465a3f5c58a 612
sunyiming 1:6465a3f5c58a 613 if (pbuf_header(pb, -(int)(PPPOE_HEADERLEN)) != 0) {
sunyiming 1:6465a3f5c58a 614 /* bail out */
sunyiming 1:6465a3f5c58a 615 PPPDEBUG(LOG_ERR, ("pppoe_data_input: pbuf_header PPPOE_HEADERLEN failed\n"));
sunyiming 1:6465a3f5c58a 616 LINK_STATS_INC(link.lenerr);
sunyiming 1:6465a3f5c58a 617 goto drop;
sunyiming 1:6465a3f5c58a 618 }
sunyiming 1:6465a3f5c58a 619
sunyiming 1:6465a3f5c58a 620 PPPDEBUG(LOG_DEBUG, ("pppoe_data_input: %c%c%"U16_F": pkthdr.len=%d, pppoe.len=%d\n",
sunyiming 1:6465a3f5c58a 621 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
sunyiming 1:6465a3f5c58a 622 pb->len, plen));
sunyiming 1:6465a3f5c58a 623
sunyiming 1:6465a3f5c58a 624 if (pb->len < plen) {
sunyiming 1:6465a3f5c58a 625 goto drop;
sunyiming 1:6465a3f5c58a 626 }
sunyiming 1:6465a3f5c58a 627
sunyiming 1:6465a3f5c58a 628 pppInProcOverEthernet(sc->sc_pd, pb);
sunyiming 1:6465a3f5c58a 629
sunyiming 1:6465a3f5c58a 630 return;
sunyiming 1:6465a3f5c58a 631
sunyiming 1:6465a3f5c58a 632 drop:
sunyiming 1:6465a3f5c58a 633 pbuf_free(pb);
sunyiming 1:6465a3f5c58a 634 }
sunyiming 1:6465a3f5c58a 635
sunyiming 1:6465a3f5c58a 636 static err_t
sunyiming 1:6465a3f5c58a 637 pppoe_output(struct pppoe_softc *sc, struct pbuf *pb)
sunyiming 1:6465a3f5c58a 638 {
sunyiming 1:6465a3f5c58a 639 struct eth_hdr *ethhdr;
sunyiming 1:6465a3f5c58a 640 u16_t etype;
sunyiming 1:6465a3f5c58a 641 err_t res;
sunyiming 1:6465a3f5c58a 642
sunyiming 1:6465a3f5c58a 643 if (!sc->sc_ethif) {
sunyiming 1:6465a3f5c58a 644 pbuf_free(pb);
sunyiming 1:6465a3f5c58a 645 return ERR_IF;
sunyiming 1:6465a3f5c58a 646 }
sunyiming 1:6465a3f5c58a 647
sunyiming 1:6465a3f5c58a 648 ethhdr = (struct eth_hdr *)pb->payload;
sunyiming 1:6465a3f5c58a 649 etype = sc->sc_state == PPPOE_STATE_SESSION ? ETHTYPE_PPPOE : ETHTYPE_PPPOEDISC;
sunyiming 1:6465a3f5c58a 650 ethhdr->type = htons(etype);
sunyiming 1:6465a3f5c58a 651 MEMCPY(ethhdr->dest.addr, sc->sc_dest.addr, sizeof(ethhdr->dest.addr));
sunyiming 1:6465a3f5c58a 652 MEMCPY(ethhdr->src.addr, ((struct eth_addr *)sc->sc_ethif->hwaddr)->addr, sizeof(ethhdr->src.addr));
sunyiming 1:6465a3f5c58a 653
sunyiming 1:6465a3f5c58a 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",
sunyiming 1:6465a3f5c58a 655 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, etype,
sunyiming 1:6465a3f5c58a 656 sc->sc_state, sc->sc_session,
sunyiming 1:6465a3f5c58a 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],
sunyiming 1:6465a3f5c58a 658 pb->tot_len));
sunyiming 1:6465a3f5c58a 659
sunyiming 1:6465a3f5c58a 660 res = sc->sc_ethif->linkoutput(sc->sc_ethif, pb);
sunyiming 1:6465a3f5c58a 661
sunyiming 1:6465a3f5c58a 662 pbuf_free(pb);
sunyiming 1:6465a3f5c58a 663
sunyiming 1:6465a3f5c58a 664 return res;
sunyiming 1:6465a3f5c58a 665 }
sunyiming 1:6465a3f5c58a 666
sunyiming 1:6465a3f5c58a 667 static err_t
sunyiming 1:6465a3f5c58a 668 pppoe_send_padi(struct pppoe_softc *sc)
sunyiming 1:6465a3f5c58a 669 {
sunyiming 1:6465a3f5c58a 670 struct pbuf *pb;
sunyiming 1:6465a3f5c58a 671 u8_t *p;
sunyiming 1:6465a3f5c58a 672 int len;
sunyiming 1:6465a3f5c58a 673 #ifdef PPPOE_TODO
sunyiming 1:6465a3f5c58a 674 int l1 = 0, l2 = 0; /* XXX: gcc */
sunyiming 1:6465a3f5c58a 675 #endif /* PPPOE_TODO */
sunyiming 1:6465a3f5c58a 676
sunyiming 1:6465a3f5c58a 677 if (sc->sc_state >PPPOE_STATE_PADI_SENT) {
sunyiming 1:6465a3f5c58a 678 PPPDEBUG(LOG_ERR, ("ERROR: pppoe_send_padi in state %d", sc->sc_state));
sunyiming 1:6465a3f5c58a 679 }
sunyiming 1:6465a3f5c58a 680
sunyiming 1:6465a3f5c58a 681 /* calculate length of frame (excluding ethernet header + pppoe header) */
sunyiming 1:6465a3f5c58a 682 len = 2 + 2 + 2 + 2 + sizeof sc; /* service name tag is required, host unique is send too */
sunyiming 1:6465a3f5c58a 683 #ifdef PPPOE_TODO
sunyiming 1:6465a3f5c58a 684 if (sc->sc_service_name != NULL) {
sunyiming 1:6465a3f5c58a 685 l1 = (int)strlen(sc->sc_service_name);
sunyiming 1:6465a3f5c58a 686 len += l1;
sunyiming 1:6465a3f5c58a 687 }
sunyiming 1:6465a3f5c58a 688 if (sc->sc_concentrator_name != NULL) {
sunyiming 1:6465a3f5c58a 689 l2 = (int)strlen(sc->sc_concentrator_name);
sunyiming 1:6465a3f5c58a 690 len += 2 + 2 + l2;
sunyiming 1:6465a3f5c58a 691 }
sunyiming 1:6465a3f5c58a 692 #endif /* PPPOE_TODO */
sunyiming 1:6465a3f5c58a 693 LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
sunyiming 1:6465a3f5c58a 694 sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
sunyiming 1:6465a3f5c58a 695
sunyiming 1:6465a3f5c58a 696 /* allocate a buffer */
sunyiming 1:6465a3f5c58a 697 pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
sunyiming 1:6465a3f5c58a 698 if (!pb) {
sunyiming 1:6465a3f5c58a 699 return ERR_MEM;
sunyiming 1:6465a3f5c58a 700 }
sunyiming 1:6465a3f5c58a 701 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
sunyiming 1:6465a3f5c58a 702
sunyiming 1:6465a3f5c58a 703 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
sunyiming 1:6465a3f5c58a 704 /* fill in pkt */
sunyiming 1:6465a3f5c58a 705 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADI, 0, (u16_t)len);
sunyiming 1:6465a3f5c58a 706 PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
sunyiming 1:6465a3f5c58a 707 #ifdef PPPOE_TODO
sunyiming 1:6465a3f5c58a 708 if (sc->sc_service_name != NULL) {
sunyiming 1:6465a3f5c58a 709 PPPOE_ADD_16(p, l1);
sunyiming 1:6465a3f5c58a 710 MEMCPY(p, sc->sc_service_name, l1);
sunyiming 1:6465a3f5c58a 711 p += l1;
sunyiming 1:6465a3f5c58a 712 } else
sunyiming 1:6465a3f5c58a 713 #endif /* PPPOE_TODO */
sunyiming 1:6465a3f5c58a 714 {
sunyiming 1:6465a3f5c58a 715 PPPOE_ADD_16(p, 0);
sunyiming 1:6465a3f5c58a 716 }
sunyiming 1:6465a3f5c58a 717 #ifdef PPPOE_TODO
sunyiming 1:6465a3f5c58a 718 if (sc->sc_concentrator_name != NULL) {
sunyiming 1:6465a3f5c58a 719 PPPOE_ADD_16(p, PPPOE_TAG_ACNAME);
sunyiming 1:6465a3f5c58a 720 PPPOE_ADD_16(p, l2);
sunyiming 1:6465a3f5c58a 721 MEMCPY(p, sc->sc_concentrator_name, l2);
sunyiming 1:6465a3f5c58a 722 p += l2;
sunyiming 1:6465a3f5c58a 723 }
sunyiming 1:6465a3f5c58a 724 #endif /* PPPOE_TODO */
sunyiming 1:6465a3f5c58a 725 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
sunyiming 1:6465a3f5c58a 726 PPPOE_ADD_16(p, sizeof(sc));
sunyiming 1:6465a3f5c58a 727 MEMCPY(p, &sc, sizeof sc);
sunyiming 1:6465a3f5c58a 728
sunyiming 1:6465a3f5c58a 729 /* send pkt */
sunyiming 1:6465a3f5c58a 730 return pppoe_output(sc, pb);
sunyiming 1:6465a3f5c58a 731 }
sunyiming 1:6465a3f5c58a 732
sunyiming 1:6465a3f5c58a 733 static void
sunyiming 1:6465a3f5c58a 734 pppoe_timeout(void *arg)
sunyiming 1:6465a3f5c58a 735 {
sunyiming 1:6465a3f5c58a 736 int retry_wait, err;
sunyiming 1:6465a3f5c58a 737 struct pppoe_softc *sc = (struct pppoe_softc*)arg;
sunyiming 1:6465a3f5c58a 738
sunyiming 1:6465a3f5c58a 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));
sunyiming 1:6465a3f5c58a 740
sunyiming 1:6465a3f5c58a 741 switch (sc->sc_state) {
sunyiming 1:6465a3f5c58a 742 case PPPOE_STATE_PADI_SENT:
sunyiming 1:6465a3f5c58a 743 /*
sunyiming 1:6465a3f5c58a 744 * We have two basic ways of retrying:
sunyiming 1:6465a3f5c58a 745 * - Quick retry mode: try a few times in short sequence
sunyiming 1:6465a3f5c58a 746 * - Slow retry mode: we already had a connection successfully
sunyiming 1:6465a3f5c58a 747 * established and will try infinitely (without user
sunyiming 1:6465a3f5c58a 748 * intervention)
sunyiming 1:6465a3f5c58a 749 * We only enter slow retry mode if IFF_LINK1 (aka autodial)
sunyiming 1:6465a3f5c58a 750 * is not set.
sunyiming 1:6465a3f5c58a 751 */
sunyiming 1:6465a3f5c58a 752
sunyiming 1:6465a3f5c58a 753 /* initialize for quick retry mode */
sunyiming 1:6465a3f5c58a 754 retry_wait = PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried);
sunyiming 1:6465a3f5c58a 755
sunyiming 1:6465a3f5c58a 756 sc->sc_padi_retried++;
sunyiming 1:6465a3f5c58a 757 if (sc->sc_padi_retried >= PPPOE_DISC_MAXPADI) {
sunyiming 1:6465a3f5c58a 758 #if 0
sunyiming 1:6465a3f5c58a 759 if ((sc->sc_sppp.pp_if.if_flags & IFF_LINK1) == 0) {
sunyiming 1:6465a3f5c58a 760 /* slow retry mode */
sunyiming 1:6465a3f5c58a 761 retry_wait = PPPOE_SLOW_RETRY;
sunyiming 1:6465a3f5c58a 762 } else
sunyiming 1:6465a3f5c58a 763 #endif
sunyiming 1:6465a3f5c58a 764 {
sunyiming 1:6465a3f5c58a 765 pppoe_abort_connect(sc);
sunyiming 1:6465a3f5c58a 766 return;
sunyiming 1:6465a3f5c58a 767 }
sunyiming 1:6465a3f5c58a 768 }
sunyiming 1:6465a3f5c58a 769 if ((err = pppoe_send_padi(sc)) != 0) {
sunyiming 1:6465a3f5c58a 770 sc->sc_padi_retried--;
sunyiming 1:6465a3f5c58a 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));
sunyiming 1:6465a3f5c58a 772 }
sunyiming 1:6465a3f5c58a 773 sys_timeout(retry_wait, pppoe_timeout, sc);
sunyiming 1:6465a3f5c58a 774 break;
sunyiming 1:6465a3f5c58a 775
sunyiming 1:6465a3f5c58a 776 case PPPOE_STATE_PADR_SENT:
sunyiming 1:6465a3f5c58a 777 sc->sc_padr_retried++;
sunyiming 1:6465a3f5c58a 778 if (sc->sc_padr_retried >= PPPOE_DISC_MAXPADR) {
sunyiming 1:6465a3f5c58a 779 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
sunyiming 1:6465a3f5c58a 780 sc->sc_state = PPPOE_STATE_PADI_SENT;
sunyiming 1:6465a3f5c58a 781 sc->sc_padr_retried = 0;
sunyiming 1:6465a3f5c58a 782 if ((err = pppoe_send_padi(sc)) != 0) {
sunyiming 1:6465a3f5c58a 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));
sunyiming 1:6465a3f5c58a 784 }
sunyiming 1:6465a3f5c58a 785 sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried), pppoe_timeout, sc);
sunyiming 1:6465a3f5c58a 786 return;
sunyiming 1:6465a3f5c58a 787 }
sunyiming 1:6465a3f5c58a 788 if ((err = pppoe_send_padr(sc)) != 0) {
sunyiming 1:6465a3f5c58a 789 sc->sc_padr_retried--;
sunyiming 1:6465a3f5c58a 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));
sunyiming 1:6465a3f5c58a 791 }
sunyiming 1:6465a3f5c58a 792 sys_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
sunyiming 1:6465a3f5c58a 793 break;
sunyiming 1:6465a3f5c58a 794 case PPPOE_STATE_CLOSING:
sunyiming 1:6465a3f5c58a 795 pppoe_do_disconnect(sc);
sunyiming 1:6465a3f5c58a 796 break;
sunyiming 1:6465a3f5c58a 797 default:
sunyiming 1:6465a3f5c58a 798 return; /* all done, work in peace */
sunyiming 1:6465a3f5c58a 799 }
sunyiming 1:6465a3f5c58a 800 }
sunyiming 1:6465a3f5c58a 801
sunyiming 1:6465a3f5c58a 802 /* Start a connection (i.e. initiate discovery phase) */
sunyiming 1:6465a3f5c58a 803 int
sunyiming 1:6465a3f5c58a 804 pppoe_connect(struct pppoe_softc *sc)
sunyiming 1:6465a3f5c58a 805 {
sunyiming 1:6465a3f5c58a 806 int err;
sunyiming 1:6465a3f5c58a 807
sunyiming 1:6465a3f5c58a 808 if (sc->sc_state != PPPOE_STATE_INITIAL) {
sunyiming 1:6465a3f5c58a 809 return EBUSY;
sunyiming 1:6465a3f5c58a 810 }
sunyiming 1:6465a3f5c58a 811
sunyiming 1:6465a3f5c58a 812 #ifdef PPPOE_SERVER
sunyiming 1:6465a3f5c58a 813 /* wait PADI if IFF_PASSIVE */
sunyiming 1:6465a3f5c58a 814 if ((sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
sunyiming 1:6465a3f5c58a 815 return 0;
sunyiming 1:6465a3f5c58a 816 }
sunyiming 1:6465a3f5c58a 817 #endif
sunyiming 1:6465a3f5c58a 818 /* save state, in case we fail to send PADI */
sunyiming 1:6465a3f5c58a 819 sc->sc_state = PPPOE_STATE_PADI_SENT;
sunyiming 1:6465a3f5c58a 820 sc->sc_padr_retried = 0;
sunyiming 1:6465a3f5c58a 821 err = pppoe_send_padi(sc);
sunyiming 1:6465a3f5c58a 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));
sunyiming 1:6465a3f5c58a 823 sys_timeout(PPPOE_DISC_TIMEOUT, pppoe_timeout, sc);
sunyiming 1:6465a3f5c58a 824 return err;
sunyiming 1:6465a3f5c58a 825 }
sunyiming 1:6465a3f5c58a 826
sunyiming 1:6465a3f5c58a 827 /* disconnect */
sunyiming 1:6465a3f5c58a 828 void
sunyiming 1:6465a3f5c58a 829 pppoe_disconnect(struct pppoe_softc *sc)
sunyiming 1:6465a3f5c58a 830 {
sunyiming 1:6465a3f5c58a 831 if (sc->sc_state < PPPOE_STATE_SESSION) {
sunyiming 1:6465a3f5c58a 832 return;
sunyiming 1:6465a3f5c58a 833 }
sunyiming 1:6465a3f5c58a 834 /*
sunyiming 1:6465a3f5c58a 835 * Do not call pppoe_disconnect here, the upper layer state
sunyiming 1:6465a3f5c58a 836 * machine gets confused by this. We must return from this
sunyiming 1:6465a3f5c58a 837 * function and defer disconnecting to the timeout handler.
sunyiming 1:6465a3f5c58a 838 */
sunyiming 1:6465a3f5c58a 839 sc->sc_state = PPPOE_STATE_CLOSING;
sunyiming 1:6465a3f5c58a 840 sys_timeout(20, pppoe_timeout, sc);
sunyiming 1:6465a3f5c58a 841 }
sunyiming 1:6465a3f5c58a 842
sunyiming 1:6465a3f5c58a 843 static int
sunyiming 1:6465a3f5c58a 844 pppoe_do_disconnect(struct pppoe_softc *sc)
sunyiming 1:6465a3f5c58a 845 {
sunyiming 1:6465a3f5c58a 846 int err;
sunyiming 1:6465a3f5c58a 847
sunyiming 1:6465a3f5c58a 848 if (sc->sc_state < PPPOE_STATE_SESSION) {
sunyiming 1:6465a3f5c58a 849 err = EBUSY;
sunyiming 1:6465a3f5c58a 850 } else {
sunyiming 1:6465a3f5c58a 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));
sunyiming 1:6465a3f5c58a 852 err = pppoe_send_padt(sc->sc_ethif, sc->sc_session, (const u8_t *)&sc->sc_dest);
sunyiming 1:6465a3f5c58a 853 }
sunyiming 1:6465a3f5c58a 854
sunyiming 1:6465a3f5c58a 855 /* cleanup softc */
sunyiming 1:6465a3f5c58a 856 sc->sc_state = PPPOE_STATE_INITIAL;
sunyiming 1:6465a3f5c58a 857 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
sunyiming 1:6465a3f5c58a 858 sc->sc_ac_cookie_len = 0;
sunyiming 1:6465a3f5c58a 859 #ifdef PPPOE_SERVER
sunyiming 1:6465a3f5c58a 860 if (sc->sc_hunique) {
sunyiming 1:6465a3f5c58a 861 mem_free(sc->sc_hunique);
sunyiming 1:6465a3f5c58a 862 sc->sc_hunique = NULL;
sunyiming 1:6465a3f5c58a 863 }
sunyiming 1:6465a3f5c58a 864 sc->sc_hunique_len = 0;
sunyiming 1:6465a3f5c58a 865 #endif
sunyiming 1:6465a3f5c58a 866 sc->sc_session = 0;
sunyiming 1:6465a3f5c58a 867
sunyiming 1:6465a3f5c58a 868 sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
sunyiming 1:6465a3f5c58a 869
sunyiming 1:6465a3f5c58a 870 return err;
sunyiming 1:6465a3f5c58a 871 }
sunyiming 1:6465a3f5c58a 872
sunyiming 1:6465a3f5c58a 873 /* Connection attempt aborted */
sunyiming 1:6465a3f5c58a 874 static void
sunyiming 1:6465a3f5c58a 875 pppoe_abort_connect(struct pppoe_softc *sc)
sunyiming 1:6465a3f5c58a 876 {
sunyiming 1:6465a3f5c58a 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);
sunyiming 1:6465a3f5c58a 878 sc->sc_state = PPPOE_STATE_CLOSING;
sunyiming 1:6465a3f5c58a 879
sunyiming 1:6465a3f5c58a 880 sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
sunyiming 1:6465a3f5c58a 881
sunyiming 1:6465a3f5c58a 882 /* clear connection state */
sunyiming 1:6465a3f5c58a 883 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
sunyiming 1:6465a3f5c58a 884 sc->sc_state = PPPOE_STATE_INITIAL;
sunyiming 1:6465a3f5c58a 885 }
sunyiming 1:6465a3f5c58a 886
sunyiming 1:6465a3f5c58a 887 /* Send a PADR packet */
sunyiming 1:6465a3f5c58a 888 static err_t
sunyiming 1:6465a3f5c58a 889 pppoe_send_padr(struct pppoe_softc *sc)
sunyiming 1:6465a3f5c58a 890 {
sunyiming 1:6465a3f5c58a 891 struct pbuf *pb;
sunyiming 1:6465a3f5c58a 892 u8_t *p;
sunyiming 1:6465a3f5c58a 893 size_t len;
sunyiming 1:6465a3f5c58a 894 #ifdef PPPOE_TODO
sunyiming 1:6465a3f5c58a 895 size_t l1 = 0; /* XXX: gcc */
sunyiming 1:6465a3f5c58a 896 #endif /* PPPOE_TODO */
sunyiming 1:6465a3f5c58a 897
sunyiming 1:6465a3f5c58a 898 if (sc->sc_state != PPPOE_STATE_PADR_SENT) {
sunyiming 1:6465a3f5c58a 899 return ERR_CONN;
sunyiming 1:6465a3f5c58a 900 }
sunyiming 1:6465a3f5c58a 901
sunyiming 1:6465a3f5c58a 902 len = 2 + 2 + 2 + 2 + sizeof(sc); /* service name, host unique */
sunyiming 1:6465a3f5c58a 903 #ifdef PPPOE_TODO
sunyiming 1:6465a3f5c58a 904 if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
sunyiming 1:6465a3f5c58a 905 l1 = strlen(sc->sc_service_name);
sunyiming 1:6465a3f5c58a 906 len += l1;
sunyiming 1:6465a3f5c58a 907 }
sunyiming 1:6465a3f5c58a 908 #endif /* PPPOE_TODO */
sunyiming 1:6465a3f5c58a 909 if (sc->sc_ac_cookie_len > 0) {
sunyiming 1:6465a3f5c58a 910 len += 2 + 2 + sc->sc_ac_cookie_len; /* AC cookie */
sunyiming 1:6465a3f5c58a 911 }
sunyiming 1:6465a3f5c58a 912 LWIP_ASSERT("sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff",
sunyiming 1:6465a3f5c58a 913 sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len <= 0xffff);
sunyiming 1:6465a3f5c58a 914 pb = pbuf_alloc(PBUF_LINK, (u16_t)(sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len), PBUF_RAM);
sunyiming 1:6465a3f5c58a 915 if (!pb) {
sunyiming 1:6465a3f5c58a 916 return ERR_MEM;
sunyiming 1:6465a3f5c58a 917 }
sunyiming 1:6465a3f5c58a 918 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
sunyiming 1:6465a3f5c58a 919 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
sunyiming 1:6465a3f5c58a 920 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADR, 0, len);
sunyiming 1:6465a3f5c58a 921 PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
sunyiming 1:6465a3f5c58a 922 #ifdef PPPOE_TODO
sunyiming 1:6465a3f5c58a 923 if (sc->sc_service_name != NULL) {
sunyiming 1:6465a3f5c58a 924 PPPOE_ADD_16(p, l1);
sunyiming 1:6465a3f5c58a 925 MEMCPY(p, sc->sc_service_name, l1);
sunyiming 1:6465a3f5c58a 926 p += l1;
sunyiming 1:6465a3f5c58a 927 } else
sunyiming 1:6465a3f5c58a 928 #endif /* PPPOE_TODO */
sunyiming 1:6465a3f5c58a 929 {
sunyiming 1:6465a3f5c58a 930 PPPOE_ADD_16(p, 0);
sunyiming 1:6465a3f5c58a 931 }
sunyiming 1:6465a3f5c58a 932 if (sc->sc_ac_cookie_len > 0) {
sunyiming 1:6465a3f5c58a 933 PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
sunyiming 1:6465a3f5c58a 934 PPPOE_ADD_16(p, sc->sc_ac_cookie_len);
sunyiming 1:6465a3f5c58a 935 MEMCPY(p, sc->sc_ac_cookie, sc->sc_ac_cookie_len);
sunyiming 1:6465a3f5c58a 936 p += sc->sc_ac_cookie_len;
sunyiming 1:6465a3f5c58a 937 }
sunyiming 1:6465a3f5c58a 938 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
sunyiming 1:6465a3f5c58a 939 PPPOE_ADD_16(p, sizeof(sc));
sunyiming 1:6465a3f5c58a 940 MEMCPY(p, &sc, sizeof sc);
sunyiming 1:6465a3f5c58a 941
sunyiming 1:6465a3f5c58a 942 return pppoe_output(sc, pb);
sunyiming 1:6465a3f5c58a 943 }
sunyiming 1:6465a3f5c58a 944
sunyiming 1:6465a3f5c58a 945 /* send a PADT packet */
sunyiming 1:6465a3f5c58a 946 static err_t
sunyiming 1:6465a3f5c58a 947 pppoe_send_padt(struct netif *outgoing_if, u_int session, const u8_t *dest)
sunyiming 1:6465a3f5c58a 948 {
sunyiming 1:6465a3f5c58a 949 struct pbuf *pb;
sunyiming 1:6465a3f5c58a 950 struct eth_hdr *ethhdr;
sunyiming 1:6465a3f5c58a 951 err_t res;
sunyiming 1:6465a3f5c58a 952 u8_t *p;
sunyiming 1:6465a3f5c58a 953
sunyiming 1:6465a3f5c58a 954 pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN, PBUF_RAM);
sunyiming 1:6465a3f5c58a 955 if (!pb) {
sunyiming 1:6465a3f5c58a 956 return ERR_MEM;
sunyiming 1:6465a3f5c58a 957 }
sunyiming 1:6465a3f5c58a 958 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
sunyiming 1:6465a3f5c58a 959
sunyiming 1:6465a3f5c58a 960 ethhdr = (struct eth_hdr *)pb->payload;
sunyiming 1:6465a3f5c58a 961 ethhdr->type = PP_HTONS(ETHTYPE_PPPOEDISC);
sunyiming 1:6465a3f5c58a 962 MEMCPY(ethhdr->dest.addr, dest, sizeof(ethhdr->dest.addr));
sunyiming 1:6465a3f5c58a 963 MEMCPY(ethhdr->src.addr, ((struct eth_addr *)outgoing_if->hwaddr)->addr, sizeof(ethhdr->src.addr));
sunyiming 1:6465a3f5c58a 964
sunyiming 1:6465a3f5c58a 965 p = (u8_t*)(ethhdr + 1);
sunyiming 1:6465a3f5c58a 966 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADT, session, 0);
sunyiming 1:6465a3f5c58a 967
sunyiming 1:6465a3f5c58a 968 res = outgoing_if->linkoutput(outgoing_if, pb);
sunyiming 1:6465a3f5c58a 969
sunyiming 1:6465a3f5c58a 970 pbuf_free(pb);
sunyiming 1:6465a3f5c58a 971
sunyiming 1:6465a3f5c58a 972 return res;
sunyiming 1:6465a3f5c58a 973 }
sunyiming 1:6465a3f5c58a 974
sunyiming 1:6465a3f5c58a 975 #ifdef PPPOE_SERVER
sunyiming 1:6465a3f5c58a 976 static err_t
sunyiming 1:6465a3f5c58a 977 pppoe_send_pado(struct pppoe_softc *sc)
sunyiming 1:6465a3f5c58a 978 {
sunyiming 1:6465a3f5c58a 979 struct pbuf *pb;
sunyiming 1:6465a3f5c58a 980 u8_t *p;
sunyiming 1:6465a3f5c58a 981 size_t len;
sunyiming 1:6465a3f5c58a 982
sunyiming 1:6465a3f5c58a 983 if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
sunyiming 1:6465a3f5c58a 984 return ERR_CONN;
sunyiming 1:6465a3f5c58a 985 }
sunyiming 1:6465a3f5c58a 986
sunyiming 1:6465a3f5c58a 987 /* calc length */
sunyiming 1:6465a3f5c58a 988 len = 0;
sunyiming 1:6465a3f5c58a 989 /* include ac_cookie */
sunyiming 1:6465a3f5c58a 990 len += 2 + 2 + sizeof(sc);
sunyiming 1:6465a3f5c58a 991 /* include hunique */
sunyiming 1:6465a3f5c58a 992 len += 2 + 2 + sc->sc_hunique_len;
sunyiming 1:6465a3f5c58a 993 pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
sunyiming 1:6465a3f5c58a 994 if (!pb) {
sunyiming 1:6465a3f5c58a 995 return ERR_MEM;
sunyiming 1:6465a3f5c58a 996 }
sunyiming 1:6465a3f5c58a 997 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
sunyiming 1:6465a3f5c58a 998 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
sunyiming 1:6465a3f5c58a 999 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADO, 0, len);
sunyiming 1:6465a3f5c58a 1000 PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
sunyiming 1:6465a3f5c58a 1001 PPPOE_ADD_16(p, sizeof(sc));
sunyiming 1:6465a3f5c58a 1002 MEMCPY(p, &sc, sizeof(sc));
sunyiming 1:6465a3f5c58a 1003 p += sizeof(sc);
sunyiming 1:6465a3f5c58a 1004 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
sunyiming 1:6465a3f5c58a 1005 PPPOE_ADD_16(p, sc->sc_hunique_len);
sunyiming 1:6465a3f5c58a 1006 MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
sunyiming 1:6465a3f5c58a 1007 return pppoe_output(sc, pb);
sunyiming 1:6465a3f5c58a 1008 }
sunyiming 1:6465a3f5c58a 1009
sunyiming 1:6465a3f5c58a 1010 static err_t
sunyiming 1:6465a3f5c58a 1011 pppoe_send_pads(struct pppoe_softc *sc)
sunyiming 1:6465a3f5c58a 1012 {
sunyiming 1:6465a3f5c58a 1013 struct pbuf *pb;
sunyiming 1:6465a3f5c58a 1014 u8_t *p;
sunyiming 1:6465a3f5c58a 1015 size_t len, l1 = 0; /* XXX: gcc */
sunyiming 1:6465a3f5c58a 1016
sunyiming 1:6465a3f5c58a 1017 if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
sunyiming 1:6465a3f5c58a 1018 return ERR_CONN;
sunyiming 1:6465a3f5c58a 1019 }
sunyiming 1:6465a3f5c58a 1020
sunyiming 1:6465a3f5c58a 1021 sc->sc_session = mono_time.tv_sec % 0xff + 1;
sunyiming 1:6465a3f5c58a 1022 /* calc length */
sunyiming 1:6465a3f5c58a 1023 len = 0;
sunyiming 1:6465a3f5c58a 1024 /* include hunique */
sunyiming 1:6465a3f5c58a 1025 len += 2 + 2 + 2 + 2 + sc->sc_hunique_len; /* service name, host unique*/
sunyiming 1:6465a3f5c58a 1026 if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
sunyiming 1:6465a3f5c58a 1027 l1 = strlen(sc->sc_service_name);
sunyiming 1:6465a3f5c58a 1028 len += l1;
sunyiming 1:6465a3f5c58a 1029 }
sunyiming 1:6465a3f5c58a 1030 pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
sunyiming 1:6465a3f5c58a 1031 if (!pb) {
sunyiming 1:6465a3f5c58a 1032 return ERR_MEM;
sunyiming 1:6465a3f5c58a 1033 }
sunyiming 1:6465a3f5c58a 1034 LWIP_ASSERT("pb->tot_len == pb->len", pb->tot_len == pb->len);
sunyiming 1:6465a3f5c58a 1035 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
sunyiming 1:6465a3f5c58a 1036 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADS, sc->sc_session, len);
sunyiming 1:6465a3f5c58a 1037 PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
sunyiming 1:6465a3f5c58a 1038 if (sc->sc_service_name != NULL) {
sunyiming 1:6465a3f5c58a 1039 PPPOE_ADD_16(p, l1);
sunyiming 1:6465a3f5c58a 1040 MEMCPY(p, sc->sc_service_name, l1);
sunyiming 1:6465a3f5c58a 1041 p += l1;
sunyiming 1:6465a3f5c58a 1042 } else {
sunyiming 1:6465a3f5c58a 1043 PPPOE_ADD_16(p, 0);
sunyiming 1:6465a3f5c58a 1044 }
sunyiming 1:6465a3f5c58a 1045 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
sunyiming 1:6465a3f5c58a 1046 PPPOE_ADD_16(p, sc->sc_hunique_len);
sunyiming 1:6465a3f5c58a 1047 MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
sunyiming 1:6465a3f5c58a 1048 return pppoe_output(sc, pb);
sunyiming 1:6465a3f5c58a 1049 }
sunyiming 1:6465a3f5c58a 1050 #endif
sunyiming 1:6465a3f5c58a 1051
sunyiming 1:6465a3f5c58a 1052 err_t
sunyiming 1:6465a3f5c58a 1053 pppoe_xmit(struct pppoe_softc *sc, struct pbuf *pb)
sunyiming 1:6465a3f5c58a 1054 {
sunyiming 1:6465a3f5c58a 1055 u8_t *p;
sunyiming 1:6465a3f5c58a 1056 size_t len;
sunyiming 1:6465a3f5c58a 1057
sunyiming 1:6465a3f5c58a 1058 /* are we ready to process data yet? */
sunyiming 1:6465a3f5c58a 1059 if (sc->sc_state < PPPOE_STATE_SESSION) {
sunyiming 1:6465a3f5c58a 1060 /*sppp_flush(&sc->sc_sppp.pp_if);*/
sunyiming 1:6465a3f5c58a 1061 pbuf_free(pb);
sunyiming 1:6465a3f5c58a 1062 return ERR_CONN;
sunyiming 1:6465a3f5c58a 1063 }
sunyiming 1:6465a3f5c58a 1064
sunyiming 1:6465a3f5c58a 1065 len = pb->tot_len;
sunyiming 1:6465a3f5c58a 1066
sunyiming 1:6465a3f5c58a 1067 /* make room for Ethernet header - should not fail */
sunyiming 1:6465a3f5c58a 1068 if (pbuf_header(pb, sizeof(struct eth_hdr) + PPPOE_HEADERLEN) != 0) {
sunyiming 1:6465a3f5c58a 1069 /* bail out */
sunyiming 1:6465a3f5c58a 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));
sunyiming 1:6465a3f5c58a 1071 LINK_STATS_INC(link.lenerr);
sunyiming 1:6465a3f5c58a 1072 pbuf_free(pb);
sunyiming 1:6465a3f5c58a 1073 return ERR_BUF;
sunyiming 1:6465a3f5c58a 1074 }
sunyiming 1:6465a3f5c58a 1075
sunyiming 1:6465a3f5c58a 1076 p = (u8_t*)pb->payload + sizeof(struct eth_hdr);
sunyiming 1:6465a3f5c58a 1077 PPPOE_ADD_HEADER(p, 0, sc->sc_session, len);
sunyiming 1:6465a3f5c58a 1078
sunyiming 1:6465a3f5c58a 1079 return pppoe_output(sc, pb);
sunyiming 1:6465a3f5c58a 1080 }
sunyiming 1:6465a3f5c58a 1081
sunyiming 1:6465a3f5c58a 1082 #if 0 /*def PFIL_HOOKS*/
sunyiming 1:6465a3f5c58a 1083 static int
sunyiming 1:6465a3f5c58a 1084 pppoe_ifattach_hook(void *arg, struct pbuf **mp, struct netif *ifp, int dir)
sunyiming 1:6465a3f5c58a 1085 {
sunyiming 1:6465a3f5c58a 1086 struct pppoe_softc *sc;
sunyiming 1:6465a3f5c58a 1087 int s;
sunyiming 1:6465a3f5c58a 1088
sunyiming 1:6465a3f5c58a 1089 if (mp != (struct pbuf **)PFIL_IFNET_DETACH) {
sunyiming 1:6465a3f5c58a 1090 return 0;
sunyiming 1:6465a3f5c58a 1091 }
sunyiming 1:6465a3f5c58a 1092
sunyiming 1:6465a3f5c58a 1093 LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
sunyiming 1:6465a3f5c58a 1094 if (sc->sc_ethif != ifp) {
sunyiming 1:6465a3f5c58a 1095 continue;
sunyiming 1:6465a3f5c58a 1096 }
sunyiming 1:6465a3f5c58a 1097 if (sc->sc_sppp.pp_if.if_flags & IFF_UP) {
sunyiming 1:6465a3f5c58a 1098 sc->sc_sppp.pp_if.if_flags &= ~(IFF_UP|IFF_RUNNING);
sunyiming 1:6465a3f5c58a 1099 printf("%c%c%"U16_F": ethernet interface detached, going down\n",
sunyiming 1:6465a3f5c58a 1100 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
sunyiming 1:6465a3f5c58a 1101 }
sunyiming 1:6465a3f5c58a 1102 sc->sc_ethif = NULL;
sunyiming 1:6465a3f5c58a 1103 pppoe_clear_softc(sc, "ethernet interface detached");
sunyiming 1:6465a3f5c58a 1104 }
sunyiming 1:6465a3f5c58a 1105
sunyiming 1:6465a3f5c58a 1106 return 0;
sunyiming 1:6465a3f5c58a 1107 }
sunyiming 1:6465a3f5c58a 1108 #endif
sunyiming 1:6465a3f5c58a 1109
sunyiming 1:6465a3f5c58a 1110 static void
sunyiming 1:6465a3f5c58a 1111 pppoe_clear_softc(struct pppoe_softc *sc, const char *message)
sunyiming 1:6465a3f5c58a 1112 {
sunyiming 1:6465a3f5c58a 1113 LWIP_UNUSED_ARG(message);
sunyiming 1:6465a3f5c58a 1114
sunyiming 1:6465a3f5c58a 1115 /* stop timer */
sunyiming 1:6465a3f5c58a 1116 sys_untimeout(pppoe_timeout, sc);
sunyiming 1:6465a3f5c58a 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));
sunyiming 1:6465a3f5c58a 1118
sunyiming 1:6465a3f5c58a 1119 /* fix our state */
sunyiming 1:6465a3f5c58a 1120 sc->sc_state = PPPOE_STATE_INITIAL;
sunyiming 1:6465a3f5c58a 1121
sunyiming 1:6465a3f5c58a 1122 /* notify upper layers */
sunyiming 1:6465a3f5c58a 1123 sc->sc_linkStatusCB(sc->sc_pd, 0);
sunyiming 1:6465a3f5c58a 1124
sunyiming 1:6465a3f5c58a 1125 /* clean up softc */
sunyiming 1:6465a3f5c58a 1126 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
sunyiming 1:6465a3f5c58a 1127 sc->sc_ac_cookie_len = 0;
sunyiming 1:6465a3f5c58a 1128 sc->sc_session = 0;
sunyiming 1:6465a3f5c58a 1129 }
sunyiming 1:6465a3f5c58a 1130
sunyiming 1:6465a3f5c58a 1131 #endif /* PPPOE_SUPPORT */
sunyiming 1:6465a3f5c58a 1132