--- /dev/null
+/*****************************************************************************\r
+* ppp_oe.c - PPP Over Ethernet implementation for lwIP.\r
+*\r
+* Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc.\r
+*\r
+* The authors hereby grant permission to use, copy, modify, distribute,\r
+* and license this software and its documentation for any purpose, provided\r
+* that existing copyright notices are retained in all copies and that this\r
+* notice and the following disclaimer are included verbatim in any \r
+* distributions. No written agreement, license, or royalty fee is required\r
+* for any of the authorized uses.\r
+*\r
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR\r
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES\r
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. \r
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,\r
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT\r
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\r
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\r
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\r
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF\r
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r
+*\r
+******************************************************************************\r
+* REVISION HISTORY\r
+*\r
+* 06-01-01 Marc Boucher <marc@mbsi.ca>\r
+* Ported to lwIP.\r
+*****************************************************************************/\r
+\r
+\r
+\r
+/* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */\r
+\r
+/*-\r
+ * Copyright (c) 2002 The NetBSD Foundation, Inc.\r
+ * All rights reserved.\r
+ *\r
+ * This code is derived from software contributed to The NetBSD Foundation\r
+ * by Martin Husemann <martin@NetBSD.org>.\r
+ *\r
+ * Redistribution and use in source and binary forms, with or without\r
+ * modification, are permitted provided that the following conditions\r
+ * are met:\r
+ * 1. Redistributions of source code must retain the above copyright\r
+ * notice, this list of conditions and the following disclaimer.\r
+ * 2. Redistributions in binary form must reproduce the above copyright\r
+ * notice, this list of conditions and the following disclaimer in the\r
+ * documentation and/or other materials provided with the distribution.\r
+ * 3. All advertising materials mentioning features or use of this software\r
+ * must display the following acknowledgement:\r
+ * This product includes software developed by the NetBSD\r
+ * Foundation, Inc. and its contributors.\r
+ * 4. Neither the name of The NetBSD Foundation nor the names of its\r
+ * contributors may be used to endorse or promote products derived\r
+ * from this software without specific prior written permission.\r
+ *\r
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS\r
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED\r
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR\r
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS\r
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\r
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\r
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\r
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\r
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\r
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\r
+ * POSSIBILITY OF SUCH DAMAGE.\r
+ */\r
+\r
+#include "lwip/opt.h"\r
+\r
+#if PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */\r
+\r
+#include "ppp.h"\r
+#include "pppdebug.h"\r
+\r
+#include "lwip/sys.h"\r
+\r
+#include "netif/ppp_oe.h"\r
+#include "netif/etharp.h"\r
+\r
+#include <string.h>\r
+#include <stdio.h>\r
+\r
+/** @todo Replace this part with a simple list like other lwIP lists */\r
+#ifndef _SYS_QUEUE_H_\r
+#define _SYS_QUEUE_H_\r
+\r
+/*\r
+ * A list is headed by a single forward pointer (or an array of forward\r
+ * pointers for a hash table header). The elements are doubly linked\r
+ * so that an arbitrary element can be removed without a need to\r
+ * traverse the list. New elements can be added to the list before\r
+ * or after an existing element or at the head of the list. A list\r
+ * may only be traversed in the forward direction.\r
+ *\r
+ * For details on the use of these macros, see the queue(3) manual page.\r
+ */\r
+\r
+/*\r
+ * List declarations.\r
+ */\r
+#define LIST_HEAD(name, type) \\r
+struct name { \\r
+ struct type *lh_first; /* first element */ \\r
+}\r
+\r
+#define LIST_HEAD_INITIALIZER(head) \\r
+ { NULL }\r
+\r
+#define LIST_ENTRY(type) \\r
+struct { \\r
+ struct type *le_next; /* next element */ \\r
+ struct type **le_prev; /* address of previous next element */ \\r
+}\r
+\r
+/*\r
+ * List functions.\r
+ */\r
+\r
+#define LIST_EMPTY(head) ((head)->lh_first == NULL)\r
+\r
+#define LIST_FIRST(head) ((head)->lh_first)\r
+\r
+#define LIST_FOREACH(var, head, field) \\r
+ for ((var) = LIST_FIRST((head)); \\r
+ (var); \\r
+ (var) = LIST_NEXT((var), field))\r
+\r
+#define LIST_INIT(head) do { \\r
+ LIST_FIRST((head)) = NULL; \\r
+} while (0)\r
+\r
+#define LIST_INSERT_AFTER(listelm, elm, field) do { \\r
+ if ((LIST_NEXT((elm), field) = LIST_NEXT((listelm), field)) != NULL) \\r
+ LIST_NEXT((listelm), field)->field.le_prev = \\r
+ &LIST_NEXT((elm), field); \\r
+ LIST_NEXT((listelm), field) = (elm); \\r
+ (elm)->field.le_prev = &LIST_NEXT((listelm), field); \\r
+} while (0)\r
+\r
+#define LIST_INSERT_BEFORE(listelm, elm, field) do { \\r
+ (elm)->field.le_prev = (listelm)->field.le_prev; \\r
+ LIST_NEXT((elm), field) = (listelm); \\r
+ *(listelm)->field.le_prev = (elm); \\r
+ (listelm)->field.le_prev = &LIST_NEXT((elm), field); \\r
+} while (0)\r
+\r
+#define LIST_INSERT_HEAD(head, elm, field) do { \\r
+ if ((LIST_NEXT((elm), field) = LIST_FIRST((head))) != NULL) \\r
+ LIST_FIRST((head))->field.le_prev = &LIST_NEXT((elm), field); \\r
+ LIST_FIRST((head)) = (elm); \\r
+ (elm)->field.le_prev = &LIST_FIRST((head)); \\r
+} while (0)\r
+\r
+#define LIST_NEXT(elm, field) ((elm)->field.le_next)\r
+\r
+#define LIST_REMOVE(elm, field) do { \\r
+ if (LIST_NEXT((elm), field) != NULL) \\r
+ LIST_NEXT((elm), field)->field.le_prev = \\r
+ (elm)->field.le_prev; \\r
+ *(elm)->field.le_prev = LIST_NEXT((elm), field); \\r
+} while (0)\r
+\r
+#endif /* !_SYS_QUEUE_H_ */\r
+\r
+\r
+/* Add a 16 bit unsigned value to a buffer pointed to by PTR */\r
+#define PPPOE_ADD_16(PTR, VAL) \\r
+ *(PTR)++ = (VAL) / 256; \\r
+ *(PTR)++ = (VAL) % 256\r
+\r
+/* Add a complete PPPoE header to the buffer pointed to by PTR */\r
+#define PPPOE_ADD_HEADER(PTR, CODE, SESS, LEN) \\r
+ *(PTR)++ = PPPOE_VERTYPE; \\r
+ *(PTR)++ = (CODE); \\r
+ PPPOE_ADD_16(PTR, SESS); \\r
+ PPPOE_ADD_16(PTR, LEN)\r
+\r
+#define PPPOE_DISC_TIMEOUT (5*1000) /* base for quick timeout calculation */\r
+#define PPPOE_SLOW_RETRY (60*1000) /* persistent retry interval */\r
+#define PPPOE_DISC_MAXPADI 4 /* retry PADI four times (quickly) */\r
+#define PPPOE_DISC_MAXPADR 2 /* retry PADR twice */\r
+\r
+#ifdef PPPOE_SERVER\r
+/* from if_spppsubr.c */\r
+#define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */\r
+#endif\r
+\r
+struct pppoe_softc {\r
+ LIST_ENTRY(pppoe_softc) sc_list;\r
+ struct netif *sc_ethif; /* ethernet interface we are using */\r
+ int sc_pd; /* ppp unit number */\r
+ void (*sc_linkStatusCB)(int pd, int up);\r
+\r
+ int sc_state; /* discovery phase or session connected */\r
+ struct eth_addr sc_dest; /* hardware address of concentrator */\r
+ u16_t sc_session; /* PPPoE session id */\r
+\r
+ char *sc_service_name; /* if != NULL: requested name of service */\r
+ char *sc_concentrator_name; /* if != NULL: requested concentrator id */\r
+ u8_t *sc_ac_cookie; /* content of AC cookie we must echo back */\r
+ size_t sc_ac_cookie_len; /* length of cookie data */\r
+#ifdef PPPOE_SERVER\r
+ u8_t *sc_hunique; /* content of host unique we must echo back */\r
+ size_t sc_hunique_len; /* length of host unique */\r
+#endif\r
+ int sc_padi_retried; /* number of PADI retries already done */\r
+ int sc_padr_retried; /* number of PADR retries already done */\r
+};\r
+\r
+/* input routines */\r
+static void pppoe_dispatch_disc_pkt(struct netif *, struct pbuf *);\r
+\r
+/* management routines */\r
+static int pppoe_do_disconnect(struct pppoe_softc *);\r
+static void pppoe_abort_connect(struct pppoe_softc *);\r
+static void pppoe_clear_softc(struct pppoe_softc *, const char *);\r
+\r
+/* internal timeout handling */\r
+static void pppoe_timeout(void *);\r
+\r
+/* sending actual protocol controll packets */\r
+static err_t pppoe_send_padi(struct pppoe_softc *);\r
+static err_t pppoe_send_padr(struct pppoe_softc *);\r
+#ifdef PPPOE_SERVER\r
+static err_t pppoe_send_pado(struct pppoe_softc *);\r
+static err_t pppoe_send_pads(struct pppoe_softc *);\r
+#endif\r
+static err_t pppoe_send_padt(struct netif *, u_int, const u8_t *);\r
+\r
+/* internal helper functions */\r
+static struct pppoe_softc * pppoe_find_softc_by_session(u_int, struct netif *);\r
+static struct pppoe_softc * pppoe_find_softc_by_hunique(u8_t *, size_t, struct netif *);\r
+\r
+static LIST_HEAD(pppoe_softc_head, pppoe_softc) pppoe_softc_list;\r
+\r
+int pppoe_hdrlen;\r
+\r
+void\r
+pppoe_init(void)\r
+{\r
+ pppoe_hdrlen = sizeof(struct eth_hdr) + PPPOE_HEADERLEN;\r
+ LIST_INIT(&pppoe_softc_list);\r
+}\r
+\r
+err_t\r
+pppoe_create(struct netif *ethif, int pd, void (*linkStatusCB)(int pd, int up), struct pppoe_softc **scptr)\r
+{\r
+ struct pppoe_softc *sc;\r
+\r
+ sc = mem_malloc(sizeof(struct pppoe_softc));\r
+ if(!sc) {\r
+ *scptr = NULL;\r
+ return ERR_MEM;\r
+ }\r
+ memset(sc, 0, sizeof(struct pppoe_softc));\r
+\r
+ /* changed to real address later */\r
+ MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));\r
+\r
+ sc->sc_pd = pd;\r
+ sc->sc_linkStatusCB = linkStatusCB;\r
+ sc->sc_ethif = ethif;\r
+\r
+ LIST_INSERT_HEAD(&pppoe_softc_list, sc, sc_list);\r
+\r
+ *scptr = sc;\r
+\r
+ return ERR_OK;\r
+}\r
+\r
+err_t\r
+pppoe_destroy(struct netif *ifp)\r
+{\r
+ struct pppoe_softc * sc;\r
+\r
+ LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {\r
+ if (sc->sc_ethif == ifp) {\r
+ break;\r
+ }\r
+ }\r
+\r
+ if(!(sc && (sc->sc_ethif == ifp))) {\r
+ return ERR_IF;\r
+ }\r
+\r
+ tcpip_untimeout(pppoe_timeout, sc);\r
+ LIST_REMOVE(sc, sc_list);\r
+\r
+ if (sc->sc_concentrator_name) {\r
+ mem_free(sc->sc_concentrator_name);\r
+ }\r
+ if (sc->sc_service_name) {\r
+ mem_free(sc->sc_service_name);\r
+ }\r
+ if (sc->sc_ac_cookie) {\r
+ mem_free(sc->sc_ac_cookie);\r
+ }\r
+ mem_free(sc);\r
+\r
+ return ERR_OK;\r
+}\r
+\r
+/*\r
+ * Find the interface handling the specified session.\r
+ * Note: O(number of sessions open), this is a client-side only, mean\r
+ * and lean implementation, so number of open sessions typically should\r
+ * be 1.\r
+ */\r
+static struct pppoe_softc *\r
+pppoe_find_softc_by_session(u_int session, struct netif *rcvif)\r
+{\r
+ struct pppoe_softc *sc;\r
+\r
+ if (session == 0) {\r
+ return NULL;\r
+ }\r
+\r
+ LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {\r
+ if (sc->sc_state == PPPOE_STATE_SESSION\r
+ && sc->sc_session == session) {\r
+ if (sc->sc_ethif == rcvif) {\r
+ return sc;\r
+ } else {\r
+ return NULL;\r
+ }\r
+ }\r
+ }\r
+ return NULL;\r
+}\r
+\r
+/* Check host unique token passed and return appropriate softc pointer,\r
+ * or NULL if token is bogus. */\r
+static struct pppoe_softc *\r
+pppoe_find_softc_by_hunique(u8_t *token, size_t len, struct netif *rcvif)\r
+{\r
+ struct pppoe_softc *sc, *t;\r
+\r
+ if (LIST_EMPTY(&pppoe_softc_list)) {\r
+ return NULL;\r
+ }\r
+\r
+ if (len != sizeof sc) {\r
+ return NULL;\r
+ }\r
+ MEMCPY(&t, token, len);\r
+\r
+ LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {\r
+ if (sc == t) {\r
+ break;\r
+ }\r
+ }\r
+\r
+ if (sc == NULL) {\r
+ PPPDEBUG((LOG_DEBUG, "pppoe: alien host unique tag, no session found\n"));\r
+ return NULL;\r
+ }\r
+\r
+ /* should be safe to access *sc now */\r
+ if (sc->sc_state < PPPOE_STATE_PADI_SENT || sc->sc_state >= PPPOE_STATE_SESSION) {\r
+ printf("%c%c%"U16_F": host unique tag found, but it belongs to a connection in state %d\n",\r
+ sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_state);\r
+ return NULL;\r
+ }\r
+ if (sc->sc_ethif != rcvif) {\r
+ printf("%c%c%"U16_F": wrong interface, not accepting host unique\n",\r
+ sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);\r
+ return NULL;\r
+ }\r
+ return sc;\r
+}\r
+\r
+static void\r
+pppoe_linkstatus_up(void *arg)\r
+{\r
+ struct pppoe_softc *sc = (struct pppoe_softc*)arg;\r
+\r
+ sc->sc_linkStatusCB(sc->sc_pd, 1);\r
+}\r
+\r
+/* analyze and handle a single received packet while not in session state */\r
+static void\r
+pppoe_dispatch_disc_pkt(struct netif *netif, struct pbuf *pb)\r
+{\r
+ u16_t tag, len;\r
+ u16_t session, plen;\r
+ struct pppoe_softc *sc;\r
+ const char *err_msg;\r
+ char devname[6];\r
+ char *error;\r
+ u8_t *ac_cookie;\r
+ size_t ac_cookie_len;\r
+#ifdef PPPOE_SERVER\r
+ u8_t *hunique;\r
+ size_t hunique_len;\r
+#endif\r
+ struct pppoehdr *ph;\r
+ struct pppoetag pt;\r
+ int off = 0, err, errortag;\r
+ struct eth_hdr *ethhdr;\r
+\r
+ pb = pppSingleBuf(pb);\r
+\r
+ strcpy(devname, "pppoe"); /* as long as we don't know which instance */\r
+ err_msg = NULL;\r
+ errortag = 0;\r
+ if (pb->len < sizeof(*ethhdr)) {\r
+ goto done;\r
+ }\r
+ ethhdr = (struct eth_hdr *)pb->payload;\r
+ off += sizeof(*ethhdr);\r
+\r
+ ac_cookie = NULL;\r
+ ac_cookie_len = 0;\r
+#ifdef PPPOE_SERVER\r
+ hunique = NULL;\r
+ hunique_len = 0;\r
+#endif\r
+ session = 0;\r
+ if (pb->len - off <= PPPOE_HEADERLEN) {\r
+ printf("pppoe: packet too short: %d\n", pb->len);\r
+ goto done;\r
+ }\r
+\r
+ ph = (struct pppoehdr *) (ethhdr + 1);\r
+ if (ph->vertype != PPPOE_VERTYPE) {\r
+ printf("pppoe: unknown version/type packet: 0x%x\n", ph->vertype);\r
+ goto done;\r
+ }\r
+ session = ntohs(ph->session);\r
+ plen = ntohs(ph->plen);\r
+ off += sizeof(*ph);\r
+\r
+ if (plen + off > pb->len) {\r
+ printf("pppoe: packet content does not fit: data available = %d, packet size = %u\n",\r
+ pb->len - off, plen);\r
+ goto done;\r
+ }\r
+ if(pb->tot_len == pb->len) {\r
+ pb->tot_len = pb->len = off + plen; /* ignore trailing garbage */\r
+ }\r
+ tag = 0;\r
+ len = 0;\r
+ sc = NULL;\r
+ while (off + sizeof(pt) <= pb->len) {\r
+ MEMCPY(&pt, (u8_t*)pb->payload + off, sizeof(pt));\r
+ tag = ntohs(pt.tag);\r
+ len = ntohs(pt.len);\r
+ if (off + sizeof(pt) + len > pb->len) {\r
+ printf("pppoe: tag 0x%x len 0x%x is too long\n", tag, len);\r
+ goto done;\r
+ }\r
+ switch (tag) {\r
+ case PPPOE_TAG_EOL:\r
+ goto breakbreak;\r
+ case PPPOE_TAG_SNAME:\r
+ break; /* ignored */\r
+ case PPPOE_TAG_ACNAME:\r
+ break; /* ignored */\r
+ case PPPOE_TAG_HUNIQUE:\r
+ if (sc != NULL) {\r
+ break;\r
+ }\r
+#ifdef PPPOE_SERVER\r
+ hunique = (u8_t*)pb->payload + off + sizeof(pt);\r
+ hunique_len = len;\r
+#endif\r
+ sc = pppoe_find_softc_by_hunique((u8_t*)pb->payload + off + sizeof(pt), len, netif);\r
+ if (sc != NULL) {\r
+ snprintf(devname, sizeof(devname), "%c%c%"U16_F, sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);\r
+ }\r
+ break;\r
+ case PPPOE_TAG_ACCOOKIE:\r
+ if (ac_cookie == NULL) {\r
+ ac_cookie = (u8_t*)pb->payload + off + sizeof(pt);\r
+ ac_cookie_len = len;\r
+ }\r
+ break;\r
+ case PPPOE_TAG_SNAME_ERR:\r
+ err_msg = "SERVICE NAME ERROR";\r
+ errortag = 1;\r
+ break;\r
+ case PPPOE_TAG_ACSYS_ERR:\r
+ err_msg = "AC SYSTEM ERROR";\r
+ errortag = 1;\r
+ break;\r
+ case PPPOE_TAG_GENERIC_ERR:\r
+ err_msg = "GENERIC ERROR";\r
+ errortag = 1;\r
+ break;\r
+ }\r
+ if (err_msg) {\r
+ error = NULL;\r
+ if (errortag && len) {\r
+ error = mem_malloc(len+1);\r
+ if (error) {\r
+ strncpy(error, (char*)pb->payload + off + sizeof(pt), len);\r
+ error[len-1] = '\0';\r
+ }\r
+ }\r
+ if (error) {\r
+ printf("%s: %s: %s\n", devname, err_msg, error);\r
+ mem_free(error);\r
+ } else {\r
+ printf("%s: %s\n", devname, err_msg);\r
+ }\r
+ if (errortag) {\r
+ goto done;\r
+ }\r
+ }\r
+ off += sizeof(pt) + len;\r
+ }\r
+\r
+breakbreak:;\r
+ switch (ph->code) {\r
+ case PPPOE_CODE_PADI:\r
+#ifdef PPPOE_SERVER\r
+ /*\r
+ * got service name, concentrator name, and/or host unique.\r
+ * ignore if we have no interfaces with IFF_PASSIVE|IFF_UP.\r
+ */\r
+ if (LIST_EMPTY(&pppoe_softc_list)) {\r
+ goto done;\r
+ }\r
+ LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {\r
+ if (!(sc->sc_sppp.pp_if.if_flags & IFF_UP)) {\r
+ continue;\r
+ }\r
+ if (!(sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {\r
+ continue;\r
+ }\r
+ if (sc->sc_state == PPPOE_STATE_INITIAL) {\r
+ break;\r
+ }\r
+ }\r
+ if (sc == NULL) {\r
+ /* printf("pppoe: free passive interface is not found\n"); */\r
+ goto done;\r
+ }\r
+ if (hunique) {\r
+ if (sc->sc_hunique) {\r
+ mem_free(sc->sc_hunique);\r
+ }\r
+ sc->sc_hunique = mem_malloc(hunique_len);\r
+ if (sc->sc_hunique == NULL) {\r
+ goto done;\r
+ }\r
+ sc->sc_hunique_len = hunique_len;\r
+ MEMCPY(sc->sc_hunique, hunique, hunique_len);\r
+ }\r
+ MEMCPY(&sc->sc_dest, eh->ether_shost, sizeof sc->sc_dest);\r
+ sc->sc_state = PPPOE_STATE_PADO_SENT;\r
+ pppoe_send_pado(sc);\r
+ break;\r
+ #endif /* PPPOE_SERVER */\r
+ case PPPOE_CODE_PADR:\r
+ #ifdef PPPOE_SERVER\r
+ /*\r
+ * get sc from ac_cookie if IFF_PASSIVE\r
+ */\r
+ if (ac_cookie == NULL) {\r
+ /* be quiet if there is not a single pppoe instance */\r
+ printf("pppoe: received PADR but not includes ac_cookie\n");\r
+ goto done;\r
+ }\r
+ sc = pppoe_find_softc_by_hunique(ac_cookie, ac_cookie_len, netif);\r
+ if (sc == NULL) {\r
+ /* be quiet if there is not a single pppoe instance */\r
+ if (!LIST_EMPTY(&pppoe_softc_list)) {\r
+ printf("pppoe: received PADR but could not find request for it\n");\r
+ }\r
+ goto done;\r
+ }\r
+ if (sc->sc_state != PPPOE_STATE_PADO_SENT) {\r
+ printf("%c%c%"U16_F": received unexpected PADR\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);\r
+ goto done;\r
+ }\r
+ if (hunique) {\r
+ if (sc->sc_hunique) {\r
+ mem_free(sc->sc_hunique);\r
+ }\r
+ sc->sc_hunique = mem_malloc(hunique_len);\r
+ if (sc->sc_hunique == NULL) {\r
+ goto done;\r
+ }\r
+ sc->sc_hunique_len = hunique_len;\r
+ MEMCPY(sc->sc_hunique, hunique, hunique_len);\r
+ }\r
+ pppoe_send_pads(sc);\r
+ sc->sc_state = PPPOE_STATE_SESSION;\r
+ tcpip_timeout (100, pppoe_linkstatus_up, sc); /* notify upper layers */\r
+ break;\r
+ #else\r
+ /* ignore, we are no access concentrator */\r
+ goto done;\r
+ #endif /* PPPOE_SERVER */\r
+ case PPPOE_CODE_PADO:\r
+ if (sc == NULL) {\r
+ /* be quiet if there is not a single pppoe instance */\r
+ if (!LIST_EMPTY(&pppoe_softc_list)) {\r
+ printf("pppoe: received PADO but could not find request for it\n");\r
+ }\r
+ goto done;\r
+ }\r
+ if (sc->sc_state != PPPOE_STATE_PADI_SENT) {\r
+ printf("%c%c%"U16_F": received unexpected PADO\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);\r
+ goto done;\r
+ }\r
+ if (ac_cookie) {\r
+ if (sc->sc_ac_cookie) {\r
+ mem_free(sc->sc_ac_cookie);\r
+ }\r
+ sc->sc_ac_cookie = mem_malloc(ac_cookie_len);\r
+ if (sc->sc_ac_cookie == NULL) {\r
+ goto done;\r
+ }\r
+ sc->sc_ac_cookie_len = ac_cookie_len;\r
+ MEMCPY(sc->sc_ac_cookie, ac_cookie, ac_cookie_len);\r
+ }\r
+ MEMCPY(&sc->sc_dest, ethhdr->src.addr, sizeof(sc->sc_dest.addr));\r
+ tcpip_untimeout(pppoe_timeout, sc);\r
+ sc->sc_padr_retried = 0;\r
+ sc->sc_state = PPPOE_STATE_PADR_SENT;\r
+ if ((err = pppoe_send_padr(sc)) != 0) {\r
+ 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));\r
+ }\r
+ tcpip_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);\r
+ break;\r
+ case PPPOE_CODE_PADS:\r
+ if (sc == NULL) {\r
+ goto done;\r
+ }\r
+ sc->sc_session = session;\r
+ tcpip_untimeout(pppoe_timeout, sc);\r
+ 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));\r
+ sc->sc_state = PPPOE_STATE_SESSION;\r
+ tcpip_timeout (100, pppoe_linkstatus_up, sc); /* notify upper layers */\r
+ break;\r
+ case PPPOE_CODE_PADT:\r
+ if (sc == NULL) {\r
+ goto done;\r
+ }\r
+ pppoe_clear_softc(sc, "received PADT");\r
+ break;\r
+ default:\r
+ if(sc) {\r
+ printf("%c%c%"U16_F": unknown code (0x%04x) session = 0x%04x\n",\r
+ sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,\r
+ ph->code, session);\r
+ } else {\r
+ printf("pppoe: unknown code (0x%04x) session = 0x%04x\n", ph->code, session);\r
+ }\r
+ break;\r
+ }\r
+\r
+done:\r
+ pbuf_free(pb);\r
+ return;\r
+}\r
+\r
+void\r
+pppoe_disc_input(struct netif *netif, struct pbuf *p)\r
+{\r
+ /* avoid error messages if there is not a single pppoe instance */\r
+ if (!LIST_EMPTY(&pppoe_softc_list)) {\r
+ pppoe_dispatch_disc_pkt(netif, p);\r
+ } else {\r
+ pbuf_free(p);\r
+ }\r
+}\r
+\r
+void\r
+pppoe_data_input(struct netif *netif, struct pbuf *pb)\r
+{\r
+ u16_t session, plen;\r
+ struct pppoe_softc *sc;\r
+ struct pppoehdr *ph;\r
+#ifdef PPPOE_TERM_UNKNOWN_SESSIONS\r
+ u8_t shost[ETHER_ADDR_LEN];\r
+#endif\r
+\r
+#ifdef PPPOE_TERM_UNKNOWN_SESSIONS\r
+ MEMCPY(shost, ((struct eth_hdr *)pb->payload)->src.addr, sizeof(shost));\r
+#endif\r
+ if (pbuf_header(pb, -(int)sizeof(struct eth_hdr)) != 0) {\r
+ /* bail out */\r
+ PPPDEBUG((LOG_ERR, "pppoe_data_input: pbuf_header failed\n"));\r
+ LINK_STATS_INC(link.lenerr);\r
+ goto drop;\r
+ } \r
+\r
+ pb = pppSingleBuf (pb);\r
+\r
+ if (pb->len <= PPPOE_HEADERLEN) {\r
+ printf("pppoe (data): dropping too short packet: %d bytes\n", pb->len);\r
+ goto drop;\r
+ }\r
+\r
+ if (pb->len < sizeof(*ph)) {\r
+ printf("pppoe_data_input: could not get PPPoE header\n");\r
+ goto drop;\r
+ }\r
+ ph = (struct pppoehdr *)pb->payload;\r
+\r
+ if (ph->vertype != PPPOE_VERTYPE) {\r
+ printf("pppoe (data): unknown version/type packet: 0x%x\n", ph->vertype);\r
+ goto drop;\r
+ }\r
+ if (ph->code != 0) {\r
+ goto drop;\r
+ }\r
+\r
+ session = ntohs(ph->session);\r
+ sc = pppoe_find_softc_by_session(session, netif);\r
+ if (sc == NULL) {\r
+#ifdef PPPOE_TERM_UNKNOWN_SESSIONS\r
+ printf("pppoe: input for unknown session 0x%x, sending PADT\n", session);\r
+ pppoe_send_padt(netif, session, shost);\r
+#endif\r
+ goto drop;\r
+ }\r
+\r
+ plen = ntohs(ph->plen);\r
+\r
+ if (pbuf_header(pb, -(int)(PPPOE_HEADERLEN)) != 0) {\r
+ /* bail out */\r
+ PPPDEBUG((LOG_ERR, "pppoe_data_input: pbuf_header PPPOE_HEADERLEN failed\n"));\r
+ LINK_STATS_INC(link.lenerr);\r
+ goto drop;\r
+ } \r
+\r
+ PPPDEBUG((LOG_DEBUG, "pppoe_data_input: %c%c%"U16_F": pkthdr.len=%d, pppoe.len=%d\n",\r
+ sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,\r
+ pb->len, plen));\r
+\r
+ if (pb->len < plen) {\r
+ goto drop;\r
+ }\r
+\r
+ pppInProcOverEthernet(sc->sc_pd, pb);\r
+\r
+ return;\r
+\r
+drop:\r
+ pbuf_free(pb);\r
+}\r
+\r
+static err_t\r
+pppoe_output(struct pppoe_softc *sc, struct pbuf *pb)\r
+{\r
+ struct eth_hdr *ethhdr;\r
+ u16_t etype;\r
+ err_t res;\r
+\r
+ if (!sc->sc_ethif) {\r
+ pbuf_free(pb);\r
+ return ERR_IF;\r
+ }\r
+\r
+ ethhdr = (struct eth_hdr *)pb->payload;\r
+ etype = sc->sc_state == PPPOE_STATE_SESSION ? ETHTYPE_PPPOE : ETHTYPE_PPPOEDISC;\r
+ ethhdr->type = htons(etype);\r
+ MEMCPY(ethhdr->dest.addr, sc->sc_dest.addr, sizeof(ethhdr->dest.addr));\r
+ MEMCPY(ethhdr->src.addr, ((struct eth_addr *)sc->sc_ethif->hwaddr)->addr, sizeof(ethhdr->src.addr));\r
+\r
+ 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",\r
+ sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, etype,\r
+ sc->sc_state, sc->sc_session,\r
+ 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],\r
+ pb->tot_len));\r
+\r
+ res = sc->sc_ethif->linkoutput(sc->sc_ethif, pb);\r
+\r
+ pbuf_free(pb);\r
+\r
+ return res;\r
+}\r
+\r
+static err_t\r
+pppoe_send_padi(struct pppoe_softc *sc)\r
+{\r
+ struct pbuf *pb;\r
+ u8_t *p;\r
+ int len, l1 = 0, l2 = 0; /* XXX: gcc */\r
+\r
+ if (sc->sc_state >PPPOE_STATE_PADI_SENT) {\r
+ PPPDEBUG((LOG_ERR, "ERROR: pppoe_send_padi in state %d", sc->sc_state));\r
+ }\r
+\r
+ /* calculate length of frame (excluding ethernet header + pppoe header) */\r
+ len = 2 + 2 + 2 + 2 + sizeof sc; /* service name tag is required, host unique is send too */\r
+ if (sc->sc_service_name != NULL) {\r
+ l1 = strlen(sc->sc_service_name);\r
+ len += l1;\r
+ }\r
+ if (sc->sc_concentrator_name != NULL) {\r
+ l2 = strlen(sc->sc_concentrator_name);\r
+ len += 2 + 2 + l2;\r
+ }\r
+\r
+ /* allocate a buffer */\r
+ pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);\r
+ if (!pb) {\r
+ return ERR_MEM;\r
+ }\r
+\r
+ p = (u8_t*)pb->payload + sizeof (struct eth_hdr);\r
+ /* fill in pkt */\r
+ PPPOE_ADD_HEADER(p, PPPOE_CODE_PADI, 0, len);\r
+ PPPOE_ADD_16(p, PPPOE_TAG_SNAME);\r
+ if (sc->sc_service_name != NULL) {\r
+ PPPOE_ADD_16(p, l1);\r
+ MEMCPY(p, sc->sc_service_name, l1);\r
+ p += l1;\r
+ } else {\r
+ PPPOE_ADD_16(p, 0);\r
+ }\r
+ if (sc->sc_concentrator_name != NULL) {\r
+ PPPOE_ADD_16(p, PPPOE_TAG_ACNAME);\r
+ PPPOE_ADD_16(p, l2);\r
+ MEMCPY(p, sc->sc_concentrator_name, l2);\r
+ p += l2;\r
+ }\r
+ PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);\r
+ PPPOE_ADD_16(p, sizeof(sc));\r
+ MEMCPY(p, &sc, sizeof sc);\r
+\r
+ /* send pkt */\r
+ return pppoe_output(sc, pb);\r
+}\r
+\r
+static void\r
+pppoe_timeout(void *arg)\r
+{\r
+ int retry_wait, err;\r
+ struct pppoe_softc *sc = (struct pppoe_softc*)arg;\r
+\r
+ PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": timeout\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));\r
+\r
+ switch (sc->sc_state) {\r
+ case PPPOE_STATE_PADI_SENT:\r
+ /*\r
+ * We have two basic ways of retrying:\r
+ * - Quick retry mode: try a few times in short sequence\r
+ * - Slow retry mode: we already had a connection successfully\r
+ * established and will try infinitely (without user\r
+ * intervention)\r
+ * We only enter slow retry mode if IFF_LINK1 (aka autodial)\r
+ * is not set.\r
+ */\r
+\r
+ /* initialize for quick retry mode */\r
+ retry_wait = PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried);\r
+\r
+ sc->sc_padi_retried++;\r
+ if (sc->sc_padi_retried >= PPPOE_DISC_MAXPADI) {\r
+#if 0\r
+ if ((sc->sc_sppp.pp_if.if_flags & IFF_LINK1) == 0) {\r
+ /* slow retry mode */\r
+ retry_wait = PPPOE_SLOW_RETRY;\r
+ } else\r
+#endif\r
+ {\r
+ pppoe_abort_connect(sc);\r
+ return;\r
+ }\r
+ }\r
+ if ((err = pppoe_send_padi(sc)) != 0) {\r
+ sc->sc_padi_retried--;\r
+ 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));\r
+ }\r
+ tcpip_timeout(retry_wait, pppoe_timeout, sc);\r
+ break;\r
+\r
+ case PPPOE_STATE_PADR_SENT:\r
+ sc->sc_padr_retried++;\r
+ if (sc->sc_padr_retried >= PPPOE_DISC_MAXPADR) {\r
+ MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));\r
+ sc->sc_state = PPPOE_STATE_PADI_SENT;\r
+ sc->sc_padr_retried = 0;\r
+ if ((err = pppoe_send_padi(sc)) != 0) {\r
+ 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));\r
+ }\r
+ tcpip_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried), pppoe_timeout, sc);\r
+ return;\r
+ }\r
+ if ((err = pppoe_send_padr(sc)) != 0) {\r
+ sc->sc_padr_retried--;\r
+ 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));\r
+ }\r
+ tcpip_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);\r
+ break;\r
+ case PPPOE_STATE_CLOSING:\r
+ pppoe_do_disconnect(sc);\r
+ break;\r
+ default:\r
+ return; /* all done, work in peace */\r
+ }\r
+}\r
+\r
+/* Start a connection (i.e. initiate discovery phase) */\r
+int\r
+pppoe_connect(struct pppoe_softc *sc)\r
+{\r
+ int err;\r
+\r
+ if (sc->sc_state != PPPOE_STATE_INITIAL) {\r
+ return EBUSY;\r
+ }\r
+\r
+#ifdef PPPOE_SERVER\r
+ /* wait PADI if IFF_PASSIVE */\r
+ if ((sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {\r
+ return 0;\r
+ }\r
+#endif\r
+ /* save state, in case we fail to send PADI */\r
+ sc->sc_state = PPPOE_STATE_PADI_SENT;\r
+ sc->sc_padr_retried = 0;\r
+ err = pppoe_send_padi(sc);\r
+ 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));\r
+ tcpip_timeout(PPPOE_DISC_TIMEOUT, pppoe_timeout, sc);\r
+ return err;\r
+}\r
+\r
+/* disconnect */\r
+void\r
+pppoe_disconnect(struct pppoe_softc *sc)\r
+{\r
+ if (sc->sc_state < PPPOE_STATE_SESSION) {\r
+ return;\r
+ }\r
+ /*\r
+ * Do not call pppoe_disconnect here, the upper layer state\r
+ * machine gets confused by this. We must return from this\r
+ * function and defer disconnecting to the timeout handler.\r
+ */\r
+ sc->sc_state = PPPOE_STATE_CLOSING;\r
+ tcpip_timeout(20, pppoe_timeout, sc);\r
+}\r
+\r
+static int\r
+pppoe_do_disconnect(struct pppoe_softc *sc)\r
+{\r
+ int err;\r
+\r
+ if (sc->sc_state < PPPOE_STATE_SESSION) {\r
+ err = EBUSY;\r
+ } else {\r
+ PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": disconnecting\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));\r
+ err = pppoe_send_padt(sc->sc_ethif, sc->sc_session, (const u8_t *)&sc->sc_dest);\r
+ }\r
+\r
+ /* cleanup softc */\r
+ sc->sc_state = PPPOE_STATE_INITIAL;\r
+ MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));\r
+ if (sc->sc_ac_cookie) {\r
+ mem_free(sc->sc_ac_cookie);\r
+ sc->sc_ac_cookie = NULL;\r
+ }\r
+ sc->sc_ac_cookie_len = 0;\r
+#ifdef PPPOE_SERVER\r
+ if (sc->sc_hunique) {\r
+ mem_free(sc->sc_hunique);\r
+ sc->sc_hunique = NULL;\r
+ }\r
+ sc->sc_hunique_len = 0;\r
+#endif\r
+ sc->sc_session = 0;\r
+\r
+ sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */\r
+\r
+ return err;\r
+}\r
+\r
+/* Connection attempt aborted */\r
+static void\r
+pppoe_abort_connect(struct pppoe_softc *sc)\r
+{\r
+ printf("%c%c%"U16_F": could not establish connection\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);\r
+ sc->sc_state = PPPOE_STATE_CLOSING;\r
+\r
+ sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */\r
+\r
+ /* clear connection state */\r
+ MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));\r
+ sc->sc_state = PPPOE_STATE_INITIAL;\r
+}\r
+\r
+/* Send a PADR packet */\r
+static err_t\r
+pppoe_send_padr(struct pppoe_softc *sc)\r
+{\r
+ struct pbuf *pb;\r
+ u8_t *p;\r
+ size_t len, l1 = 0; /* XXX: gcc */\r
+\r
+ if (sc->sc_state != PPPOE_STATE_PADR_SENT) {\r
+ return ERR_CONN;\r
+ }\r
+\r
+ len = 2 + 2 + 2 + 2 + sizeof(sc); /* service name, host unique */\r
+ if (sc->sc_service_name != NULL) { /* service name tag maybe empty */\r
+ l1 = strlen(sc->sc_service_name);\r
+ len += l1;\r
+ }\r
+ if (sc->sc_ac_cookie_len > 0) {\r
+ len += 2 + 2 + sc->sc_ac_cookie_len; /* AC cookie */\r
+ }\r
+ pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);\r
+ if (!pb) {\r
+ return ERR_MEM;\r
+ }\r
+ p = (u8_t*)pb->payload + sizeof (struct eth_hdr);\r
+ PPPOE_ADD_HEADER(p, PPPOE_CODE_PADR, 0, len);\r
+ PPPOE_ADD_16(p, PPPOE_TAG_SNAME);\r
+ if (sc->sc_service_name != NULL) {\r
+ PPPOE_ADD_16(p, l1);\r
+ MEMCPY(p, sc->sc_service_name, l1);\r
+ p += l1;\r
+ } else {\r
+ PPPOE_ADD_16(p, 0);\r
+ }\r
+ if (sc->sc_ac_cookie_len > 0) {\r
+ PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);\r
+ PPPOE_ADD_16(p, sc->sc_ac_cookie_len);\r
+ MEMCPY(p, sc->sc_ac_cookie, sc->sc_ac_cookie_len);\r
+ p += sc->sc_ac_cookie_len;\r
+ }\r
+ PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);\r
+ PPPOE_ADD_16(p, sizeof(sc));\r
+ MEMCPY(p, &sc, sizeof sc);\r
+\r
+ return pppoe_output(sc, pb);\r
+}\r
+\r
+/* send a PADT packet */\r
+static err_t\r
+pppoe_send_padt(struct netif *outgoing_if, u_int session, const u8_t *dest)\r
+{\r
+ struct pbuf *pb;\r
+ struct eth_hdr *ethhdr;\r
+ err_t res;\r
+ u8_t *p;\r
+\r
+ pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN, PBUF_RAM);\r
+ if (!pb) {\r
+ return ERR_MEM;\r
+ }\r
+\r
+ ethhdr = (struct eth_hdr *)pb->payload;\r
+ ethhdr->type = htons(ETHTYPE_PPPOEDISC);\r
+ MEMCPY(ethhdr->dest.addr, dest, sizeof(ethhdr->dest.addr));\r
+ MEMCPY(ethhdr->src.addr, ((struct eth_addr *)outgoing_if->hwaddr)->addr, sizeof(ethhdr->src.addr));\r
+\r
+ p = (u8_t*)(ethhdr + 1);\r
+ PPPOE_ADD_HEADER(p, PPPOE_CODE_PADT, session, 0);\r
+\r
+ res = outgoing_if->linkoutput(outgoing_if, pb);\r
+\r
+ pbuf_free(pb);\r
+\r
+ return res;\r
+}\r
+\r
+#ifdef PPPOE_SERVER\r
+static err_t\r
+pppoe_send_pado(struct pppoe_softc *sc)\r
+{\r
+ struct pbuf *pb;\r
+ u8_t *p;\r
+ size_t len;\r
+\r
+ if (sc->sc_state != PPPOE_STATE_PADO_SENT) {\r
+ return ERR_CONN;\r
+ }\r
+\r
+ /* calc length */\r
+ len = 0;\r
+ /* include ac_cookie */\r
+ len += 2 + 2 + sizeof(sc);\r
+ /* include hunique */\r
+ len += 2 + 2 + sc->sc_hunique_len;\r
+ pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);\r
+ if (!pb) {\r
+ return ERR_MEM;\r
+ }\r
+ p = (u8_t*)pb->payload + sizeof (struct eth_hdr);\r
+ PPPOE_ADD_HEADER(p, PPPOE_CODE_PADO, 0, len);\r
+ PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);\r
+ PPPOE_ADD_16(p, sizeof(sc));\r
+ MEMCPY(p, &sc, sizeof(sc));\r
+ p += sizeof(sc);\r
+ PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);\r
+ PPPOE_ADD_16(p, sc->sc_hunique_len);\r
+ MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);\r
+ return pppoe_output(sc, pb);\r
+}\r
+\r
+static err_t\r
+pppoe_send_pads(struct pppoe_softc *sc)\r
+{\r
+ struct pbuf *pb;\r
+ u8_t *p;\r
+ size_t len, l1 = 0; /* XXX: gcc */\r
+\r
+ if (sc->sc_state != PPPOE_STATE_PADO_SENT) {\r
+ return ERR_CONN;\r
+ }\r
+\r
+ sc->sc_session = mono_time.tv_sec % 0xff + 1;\r
+ /* calc length */\r
+ len = 0;\r
+ /* include hunique */\r
+ len += 2 + 2 + 2 + 2 + sc->sc_hunique_len; /* service name, host unique*/\r
+ if (sc->sc_service_name != NULL) { /* service name tag maybe empty */\r
+ l1 = strlen(sc->sc_service_name);\r
+ len += l1;\r
+ }\r
+ pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);\r
+ if (!pb) {\r
+ return ERR_MEM;\r
+ }\r
+ p = (u8_t*)pb->payload + sizeof (struct eth_hdr);\r
+ PPPOE_ADD_HEADER(p, PPPOE_CODE_PADS, sc->sc_session, len);\r
+ PPPOE_ADD_16(p, PPPOE_TAG_SNAME);\r
+ if (sc->sc_service_name != NULL) {\r
+ PPPOE_ADD_16(p, l1);\r
+ MEMCPY(p, sc->sc_service_name, l1);\r
+ p += l1;\r
+ } else {\r
+ PPPOE_ADD_16(p, 0);\r
+ }\r
+ PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);\r
+ PPPOE_ADD_16(p, sc->sc_hunique_len);\r
+ MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);\r
+ return pppoe_output(sc, pb);\r
+}\r
+#endif\r
+\r
+err_t\r
+pppoe_xmit(struct pppoe_softc *sc, struct pbuf *pb)\r
+{\r
+ u8_t *p;\r
+ size_t len;\r
+\r
+ /* are we ready to process data yet? */\r
+ if (sc->sc_state < PPPOE_STATE_SESSION) {\r
+ /*sppp_flush(&sc->sc_sppp.pp_if);*/\r
+ pbuf_free(pb);\r
+ return ERR_CONN;\r
+ }\r
+\r
+ len = pb->tot_len;\r
+\r
+ /* make room for Ethernet header - should not fail */\r
+ if (pbuf_header(pb, sizeof(struct eth_hdr) + PPPOE_HEADERLEN) != 0) {\r
+ /* bail out */\r
+ 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));\r
+ LINK_STATS_INC(link.lenerr);\r
+ pbuf_free(pb);\r
+ return ERR_BUF;\r
+ } \r
+\r
+ p = (u8_t*)pb->payload + sizeof(struct eth_hdr);\r
+ PPPOE_ADD_HEADER(p, 0, sc->sc_session, len);\r
+\r
+ return pppoe_output(sc, pb);\r
+}\r
+\r
+#if 0 /*def PFIL_HOOKS*/\r
+static int\r
+pppoe_ifattach_hook(void *arg, struct pbuf **mp, struct netif *ifp, int dir)\r
+{\r
+ struct pppoe_softc *sc;\r
+ int s;\r
+\r
+ if (mp != (struct pbuf **)PFIL_IFNET_DETACH) {\r
+ return 0;\r
+ }\r
+\r
+ LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {\r
+ if (sc->sc_ethif != ifp) {\r
+ continue;\r
+ }\r
+ if (sc->sc_sppp.pp_if.if_flags & IFF_UP) {\r
+ sc->sc_sppp.pp_if.if_flags &= ~(IFF_UP|IFF_RUNNING);\r
+ printf("%c%c%"U16_F": ethernet interface detached, going down\n",\r
+ sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);\r
+ }\r
+ sc->sc_ethif = NULL;\r
+ pppoe_clear_softc(sc, "ethernet interface detached");\r
+ }\r
+\r
+ return 0;\r
+}\r
+#endif\r
+\r
+static void\r
+pppoe_clear_softc(struct pppoe_softc *sc, const char *message)\r
+{\r
+ LWIP_UNUSED_ARG(message);\r
+\r
+ /* stop timer */\r
+ tcpip_untimeout(pppoe_timeout, sc);\r
+ 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));\r
+\r
+ /* fix our state */\r
+ sc->sc_state = PPPOE_STATE_INITIAL;\r
+\r
+ /* notify upper layers */\r
+ sc->sc_linkStatusCB(sc->sc_pd, 0);\r
+\r
+ /* clean up softc */\r
+ MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));\r
+ if (sc->sc_ac_cookie) {\r
+ mem_free(sc->sc_ac_cookie);\r
+ sc->sc_ac_cookie = NULL;\r
+ }\r
+ sc->sc_ac_cookie_len = 0;\r
+ sc->sc_session = 0;\r
+}\r
+\r
+#endif /* PPPOE_SUPPORT */\r
+\r
projects / freertos / blobdiff