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