1600 lines
46 KiB
C
Executable file
1600 lines
46 KiB
C
Executable file
/*****************************************************************************
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* ppp.c - Network Point to Point Protocol program file.
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*
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* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
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* portions Copyright (c) 1997 by Global Election Systems Inc.
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*
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* The authors hereby grant permission to use, copy, modify, distribute,
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* and license this software and its documentation for any purpose, provided
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* that existing copyright notices are retained in all copies and that this
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* notice and the following disclaimer are included verbatim in any
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* distributions. No written agreement, license, or royalty fee is required
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* for any of the authorized uses.
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*
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* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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* REVISION HISTORY
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*
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* 03-01-01 Marc Boucher <marc@mbsi.ca>
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* Ported to lwIP.
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* 97-11-05 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
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* Original.
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*****************************************************************************/
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/*
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* ppp_defs.h - PPP definitions.
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*
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* if_pppvar.h - private structures and declarations for PPP.
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*
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* Copyright (c) 1994 The Australian National University.
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* All rights reserved.
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*
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* Permission to use, copy, modify, and distribute this software and its
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* documentation is hereby granted, provided that the above copyright
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* notice appears in all copies. This software is provided without any
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* warranty, express or implied. The Australian National University
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* makes no representations about the suitability of this software for
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* any purpose.
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*
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* IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
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* PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
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* THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
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* OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
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* OR MODIFICATIONS.
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*/
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/*
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* if_ppp.h - Point-to-Point Protocol definitions.
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*
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* Copyright (c) 1989 Carnegie Mellon University.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by Carnegie Mellon University. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include "lwip/opt.h"
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#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
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#include "lwip/pbuf.h"
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#include "lwip/stats.h"
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#include "lwip/sys.h"
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#include "lwip/tcpip.h"
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#include "lwip/api.h"
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#include "lwip/snmp.h"
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#include "lwip/sio.h"
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#include "lwip/sys.h"
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#include "lwip/ip4.h" /* for ip4_input() */
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#if PPP_IPV6_SUPPORT
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#include "lwip/ip6.h" /* for ip6_input() */
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#endif /* PPP_IPV6_SUPPORT */
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#include "lwip/dns.h"
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#include "netif/ppp/ppp_impl.h"
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#include "netif/ppp/pppos.h"
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#include "netif/ppp/fsm.h"
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#include "netif/ppp/lcp.h"
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#include "netif/ppp/magic.h"
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#if PAP_SUPPORT
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#include "netif/ppp/upap.h"
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#endif /* PAP_SUPPORT */
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#if CHAP_SUPPORT
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#include "netif/ppp/chap-new.h"
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#endif /* CHAP_SUPPORT */
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#if EAP_SUPPORT
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#include "netif/ppp/eap.h"
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#endif /* EAP_SUPPORT */
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#if CCP_SUPPORT
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#include "netif/ppp/ccp.h"
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#endif /* CCP_SUPPORT */
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#if MPPE_SUPPORT
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#include "netif/ppp/mppe.h"
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#endif /* MPPE_SUPPORT */
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#if ECP_SUPPORT
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#include "netif/ppp/ecp.h"
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#endif /* EAP_SUPPORT */
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#if VJ_SUPPORT
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#include "netif/ppp/vj.h"
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#endif /* VJ_SUPPORT */
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#if PPP_IPV4_SUPPORT
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#include "netif/ppp/ipcp.h"
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#endif /* PPP_IPV4_SUPPORT */
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#if PPP_IPV6_SUPPORT
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#include "netif/ppp/ipv6cp.h"
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#endif /* PPP_IPV6_SUPPORT */
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/*************************/
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/*** LOCAL DEFINITIONS ***/
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/*************************/
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/* FIXME: add stats per PPP session */
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#if PPP_STATS_SUPPORT
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static struct timeval start_time; /* Time when link was started. */
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static struct pppd_stats old_link_stats;
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struct pppd_stats link_stats;
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unsigned link_connect_time;
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int link_stats_valid;
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#endif /* PPP_STATS_SUPPORT */
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/*
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* PPP Data Link Layer "protocol" table.
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* One entry per supported protocol.
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* The last entry must be NULL.
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*/
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const struct protent* const protocols[] = {
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&lcp_protent,
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#if PAP_SUPPORT
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&pap_protent,
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#endif /* PAP_SUPPORT */
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#if CHAP_SUPPORT
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&chap_protent,
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#endif /* CHAP_SUPPORT */
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#if CBCP_SUPPORT
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&cbcp_protent,
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#endif /* CBCP_SUPPORT */
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#if PPP_IPV4_SUPPORT
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&ipcp_protent,
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#endif /* PPP_IPV4_SUPPORT */
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#if PPP_IPV6_SUPPORT
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&ipv6cp_protent,
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#endif /* PPP_IPV6_SUPPORT */
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#if CCP_SUPPORT
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&ccp_protent,
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#endif /* CCP_SUPPORT */
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#if ECP_SUPPORT
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&ecp_protent,
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#endif /* ECP_SUPPORT */
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#ifdef AT_CHANGE
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&atcp_protent,
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#endif /* AT_CHANGE */
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#if EAP_SUPPORT
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&eap_protent,
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#endif /* EAP_SUPPORT */
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NULL
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};
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/* Prototypes for procedures local to this file. */
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static void ppp_do_connect(void *arg);
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static err_t ppp_netif_init_cb(struct netif *netif);
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#if LWIP_IPV4
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static err_t ppp_netif_output_ip4(struct netif *netif, struct pbuf *pb, const ip4_addr_t *ipaddr);
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#endif /* LWIP_IPV4 */
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#if PPP_IPV6_SUPPORT
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static err_t ppp_netif_output_ip6(struct netif *netif, struct pbuf *pb, const ip6_addr_t *ipaddr);
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#endif /* PPP_IPV6_SUPPORT */
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static err_t ppp_netif_output(struct netif *netif, struct pbuf *pb, u16_t protocol);
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/***********************************/
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/*** PUBLIC FUNCTION DEFINITIONS ***/
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/***********************************/
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void ppp_set_auth(ppp_pcb *pcb, u8_t authtype, const char *user, const char *passwd) {
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#if PPP_AUTH_SUPPORT
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#if PAP_SUPPORT
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pcb->settings.refuse_pap = !(authtype & PPPAUTHTYPE_PAP);
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#endif /* PAP_SUPPORT */
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#if CHAP_SUPPORT
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pcb->settings.refuse_chap = !(authtype & PPPAUTHTYPE_CHAP);
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#if MSCHAP_SUPPORT
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pcb->settings.refuse_mschap = !(authtype & PPPAUTHTYPE_MSCHAP);
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pcb->settings.refuse_mschap_v2 = !(authtype & PPPAUTHTYPE_MSCHAP_V2);
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#endif /* MSCHAP_SUPPORT */
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#endif /* CHAP_SUPPORT */
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#if EAP_SUPPORT
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pcb->settings.refuse_eap = !(authtype & PPPAUTHTYPE_EAP);
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#endif /* EAP_SUPPORT */
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pcb->settings.user = user;
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pcb->settings.passwd = passwd;
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#else /* PPP_AUTH_SUPPORT */
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LWIP_UNUSED_ARG(pcb);
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LWIP_UNUSED_ARG(authtype);
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LWIP_UNUSED_ARG(user);
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LWIP_UNUSED_ARG(passwd);
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#endif /* PPP_AUTH_SUPPORT */
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}
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#if PPP_NOTIFY_PHASE
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void ppp_set_notify_phase_callback(ppp_pcb *pcb, ppp_notify_phase_cb_fn notify_phase_cb) {
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pcb->notify_phase_cb = notify_phase_cb;
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notify_phase_cb(pcb, pcb->phase, pcb->ctx_cb);
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}
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#endif /* PPP_NOTIFY_PHASE */
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/*
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* Initiate a PPP connection.
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*
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* This can only be called if PPP is in the dead phase.
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*
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* Holdoff is the time to wait (in seconds) before initiating
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* the connection.
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*
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* If this port connects to a modem, the modem connection must be
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* established before calling this.
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*/
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err_t ppp_connect(ppp_pcb *pcb, u16_t holdoff) {
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if (pcb->phase != PPP_PHASE_DEAD) {
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return ERR_ALREADY;
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}
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PPPDEBUG(LOG_DEBUG, ("ppp_connect[%d]: holdoff=%d\n", pcb->netif->num, holdoff));
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if (holdoff == 0) {
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return pcb->link_cb->connect(pcb, pcb->link_ctx_cb);
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}
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new_phase(pcb, PPP_PHASE_HOLDOFF);
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sys_timeout((u32_t)(holdoff*1000), ppp_do_connect, pcb);
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return ERR_OK;
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}
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#if PPP_SERVER
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/*
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* Listen for an incoming PPP connection.
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*
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* This can only be called if PPP is in the dead phase.
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*
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* Local and remote interface IP addresses, as well as DNS are
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* provided through a previously filled struct ppp_addrs.
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*
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* If this port connects to a modem, the modem connection must be
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* established before calling this.
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*/
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err_t ppp_listen(ppp_pcb *pcb, struct ppp_addrs *addrs) {
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if (pcb->phase != PPP_PHASE_DEAD) {
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return ERR_ALREADY;
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}
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PPPDEBUG(LOG_DEBUG, ("ppp_listen[%d]\n", pcb->netif->num));
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if (pcb->link_cb->listen) {
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return pcb->link_cb->listen(pcb, pcb->link_ctx_cb, addrs);
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}
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return ERR_IF;
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}
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#endif /* PPP_SERVER */
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/*
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* Initiate the end of a PPP connection.
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* Any outstanding packets in the queues are dropped.
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*
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* Setting nocarrier to 1 close the PPP connection without initiating the
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* shutdown procedure. Always using nocarrier = 0 is still recommended,
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* this is going to take a little longer time if your link is down, but
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* is a safer choice for the PPP state machine.
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*
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* Return 0 on success, an error code on failure.
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*/
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err_t
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ppp_close(ppp_pcb *pcb, u8_t nocarrier)
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{
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pcb->err_code = PPPERR_USER;
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/* holdoff phase, cancel the reconnection */
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if (pcb->phase == PPP_PHASE_HOLDOFF) {
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sys_untimeout(ppp_do_connect, pcb);
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new_phase(pcb, PPP_PHASE_DEAD);
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}
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/* dead phase, nothing to do, call the status callback to be consistent */
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if (pcb->phase == PPP_PHASE_DEAD) {
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pcb->link_status_cb(pcb, pcb->err_code, pcb->ctx_cb);
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return ERR_OK;
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}
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/*
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* Only accept carrier lost signal on the stable running phase in order
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* to prevent changing the PPP phase FSM in transition phases.
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*
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* Always using nocarrier = 0 is still recommended, this is going to
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* take a little longer time, but is a safer choice from FSM point of view.
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*/
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if (nocarrier && pcb->phase == PPP_PHASE_RUNNING) {
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PPPDEBUG(LOG_DEBUG, ("ppp_close[%d]: carrier lost -> lcp_lowerdown\n", pcb->netif->num));
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lcp_lowerdown(pcb);
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/* forced link termination, this will leave us at PPP_PHASE_DEAD. */
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link_terminated(pcb);
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return ERR_OK;
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}
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/* Disconnect */
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PPPDEBUG(LOG_DEBUG, ("ppp_close[%d]: kill_link -> lcp_close\n", pcb->netif->num));
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/* LCP close request, this will leave us at PPP_PHASE_DEAD. */
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lcp_close(pcb, "User request");
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return ERR_OK;
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}
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/*
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* Release the control block.
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*
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* This can only be called if PPP is in the dead phase.
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*
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* You must use ppp_close() before if you wish to terminate
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* an established PPP session.
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*
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* Return 0 on success, an error code on failure.
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*/
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err_t ppp_free(ppp_pcb *pcb) {
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err_t err;
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if (pcb->phase != PPP_PHASE_DEAD) {
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return ERR_CONN;
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}
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PPPDEBUG(LOG_DEBUG, ("ppp_free[%d]\n", pcb->netif->num));
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netif_remove(pcb->netif);
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err = pcb->link_cb->free(pcb, pcb->link_ctx_cb);
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memp_free(MEMP_PPP_PCB, pcb);
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return err;
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}
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/* Get and set parameters for the given connection.
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* Return 0 on success, an error code on failure. */
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err_t
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ppp_ioctl(ppp_pcb *pcb, u8_t cmd, void *arg)
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{
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if (pcb == NULL) {
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return ERR_VAL;
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}
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switch(cmd) {
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case PPPCTLG_UPSTATUS: /* Get the PPP up status. */
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if (!arg) {
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goto fail;
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}
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*(int *)arg = (int)(0
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#if PPP_IPV4_SUPPORT
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|| pcb->if4_up
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#endif /* PPP_IPV4_SUPPORT */
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#if PPP_IPV6_SUPPORT
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|| pcb->if6_up
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#endif /* PPP_IPV6_SUPPORT */
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);
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return ERR_OK;
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case PPPCTLG_ERRCODE: /* Get the PPP error code. */
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if (!arg) {
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goto fail;
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}
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*(int *)arg = (int)(pcb->err_code);
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return ERR_OK;
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default:
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goto fail;
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}
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fail:
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return ERR_VAL;
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}
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/**********************************/
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/*** LOCAL FUNCTION DEFINITIONS ***/
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/**********************************/
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static void ppp_do_connect(void *arg) {
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ppp_pcb *pcb = (ppp_pcb*)arg;
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LWIP_ASSERT("pcb->phase == PPP_PHASE_DEAD || pcb->phase == PPP_PHASE_HOLDOFF", pcb->phase == PPP_PHASE_DEAD || pcb->phase == PPP_PHASE_HOLDOFF);
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pcb->link_cb->connect(pcb, pcb->link_ctx_cb);
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}
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/*
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* ppp_netif_init_cb - netif init callback
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*/
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static err_t ppp_netif_init_cb(struct netif *netif) {
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netif->name[0] = 'p';
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netif->name[1] = 'p';
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#if LWIP_IPV4
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/* FIXME: change that when netif_null_output_ip4() will materialize */
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netif->output = ppp_netif_output_ip4;
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#endif /* LWIP_IPV4 */
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#if PPP_IPV6_SUPPORT
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netif->output_ip6 = ppp_netif_output_ip6;
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#endif /* PPP_IPV6_SUPPORT */
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netif->flags = NETIF_FLAG_UP;
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#if LWIP_NETIF_HOSTNAME
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/* @todo: Initialize interface hostname */
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/* netif_set_hostname(netif, "lwip"); */
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#endif /* LWIP_NETIF_HOSTNAME */
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return ERR_OK;
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}
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#if LWIP_IPV4
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/*
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* Send an IPv4 packet on the given connection.
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*/
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static err_t ppp_netif_output_ip4(struct netif *netif, struct pbuf *pb, const ip4_addr_t *ipaddr) {
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LWIP_UNUSED_ARG(ipaddr);
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#if PPP_IPV4_SUPPORT
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return ppp_netif_output(netif, pb, PPP_IP);
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#else /* PPP_IPV4_SUPPORT */
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LWIP_UNUSED_ARG(netif);
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LWIP_UNUSED_ARG(pb);
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return ERR_IF;
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#endif /* PPP_IPV4_SUPPORT */
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}
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#endif /* LWIP_IPV4 */
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#if PPP_IPV6_SUPPORT
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/*
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* Send an IPv6 packet on the given connection.
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*/
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static err_t ppp_netif_output_ip6(struct netif *netif, struct pbuf *pb, const ip6_addr_t *ipaddr) {
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LWIP_UNUSED_ARG(ipaddr);
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return ppp_netif_output(netif, pb, PPP_IPV6);
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}
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#endif /* PPP_IPV6_SUPPORT */
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static err_t ppp_netif_output(struct netif *netif, struct pbuf *pb, u16_t protocol) {
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ppp_pcb *pcb = (ppp_pcb*)netif->state;
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err_t err;
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struct pbuf *fpb = NULL;
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/* Check that the link is up. */
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if (0
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#if PPP_IPV4_SUPPORT
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|| (protocol == PPP_IP && !pcb->if4_up)
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#endif /* PPP_IPV4_SUPPORT */
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#if PPP_IPV6_SUPPORT
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|| (protocol == PPP_IPV6 && !pcb->if6_up)
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#endif /* PPP_IPV6_SUPPORT */
|
|
) {
|
|
PPPDEBUG(LOG_ERR, ("ppp_netif_output[%d]: link not up\n", pcb->netif->num));
|
|
goto err_rte_drop;
|
|
}
|
|
|
|
#if MPPE_SUPPORT
|
|
/* If MPPE is required, refuse any IP packet until we are able to crypt them. */
|
|
if (pcb->settings.require_mppe && pcb->ccp_transmit_method != CI_MPPE) {
|
|
PPPDEBUG(LOG_ERR, ("ppp_netif_output[%d]: MPPE required, not up\n", pcb->netif->num));
|
|
goto err_rte_drop;
|
|
}
|
|
#endif /* MPPE_SUPPORT */
|
|
|
|
#if VJ_SUPPORT && LWIP_TCP
|
|
/*
|
|
* Attempt Van Jacobson header compression if VJ is configured and
|
|
* this is an IP packet.
|
|
*/
|
|
if (protocol == PPP_IP && pcb->vj_enabled) {
|
|
switch (vj_compress_tcp(&pcb->vj_comp, &pb)) {
|
|
case TYPE_IP:
|
|
/* No change...
|
|
protocol = PPP_IP; */
|
|
break;
|
|
case TYPE_COMPRESSED_TCP:
|
|
/* vj_compress_tcp() returns a new allocated pbuf, indicate we should free
|
|
* our duplicated pbuf later */
|
|
fpb = pb;
|
|
protocol = PPP_VJC_COMP;
|
|
break;
|
|
case TYPE_UNCOMPRESSED_TCP:
|
|
/* vj_compress_tcp() returns a new allocated pbuf, indicate we should free
|
|
* our duplicated pbuf later */
|
|
fpb = pb;
|
|
protocol = PPP_VJC_UNCOMP;
|
|
break;
|
|
default:
|
|
PPPDEBUG(LOG_WARNING, ("ppp_netif_output[%d]: bad IP packet\n", pcb->netif->num));
|
|
LINK_STATS_INC(link.proterr);
|
|
LINK_STATS_INC(link.drop);
|
|
MIB2_STATS_NETIF_INC(pcb->netif, ifoutdiscards);
|
|
return ERR_VAL;
|
|
}
|
|
}
|
|
#endif /* VJ_SUPPORT && LWIP_TCP */
|
|
|
|
#if CCP_SUPPORT
|
|
switch (pcb->ccp_transmit_method) {
|
|
case 0:
|
|
break; /* Don't compress */
|
|
#if MPPE_SUPPORT
|
|
case CI_MPPE:
|
|
if ((err = mppe_compress(pcb, &pcb->mppe_comp, &pb, protocol)) != ERR_OK) {
|
|
LINK_STATS_INC(link.memerr);
|
|
LINK_STATS_INC(link.drop);
|
|
MIB2_STATS_NETIF_INC(netif, ifoutdiscards);
|
|
goto err;
|
|
}
|
|
/* if VJ compressor returned a new allocated pbuf, free it */
|
|
if (fpb) {
|
|
pbuf_free(fpb);
|
|
}
|
|
/* mppe_compress() returns a new allocated pbuf, indicate we should free
|
|
* our duplicated pbuf later */
|
|
fpb = pb;
|
|
protocol = PPP_COMP;
|
|
break;
|
|
#endif /* MPPE_SUPPORT */
|
|
default:
|
|
PPPDEBUG(LOG_ERR, ("ppp_netif_output[%d]: bad CCP transmit method\n", pcb->netif->num));
|
|
goto err_rte_drop; /* Cannot really happen, we only negotiate what we are able to do */
|
|
}
|
|
#endif /* CCP_SUPPORT */
|
|
|
|
err = pcb->link_cb->netif_output(pcb, pcb->link_ctx_cb, pb, protocol);
|
|
goto err;
|
|
|
|
err_rte_drop:
|
|
err = ERR_RTE;
|
|
LINK_STATS_INC(link.rterr);
|
|
LINK_STATS_INC(link.drop);
|
|
MIB2_STATS_NETIF_INC(netif, ifoutdiscards);
|
|
err:
|
|
if (fpb) {
|
|
pbuf_free(fpb);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/************************************/
|
|
/*** PRIVATE FUNCTION DEFINITIONS ***/
|
|
/************************************/
|
|
|
|
/* Initialize the PPP subsystem. */
|
|
int ppp_init(void) {
|
|
|
|
/*
|
|
* Initialize magic number generator now so that protocols may
|
|
* use magic numbers in initialization.
|
|
*/
|
|
magic_init();
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Create a new PPP control block.
|
|
*
|
|
* This initializes the PPP control block but does not
|
|
* attempt to negotiate the LCP session.
|
|
*
|
|
* Return a new PPP connection control block pointer
|
|
* on success or a null pointer on failure.
|
|
*/
|
|
ppp_pcb *ppp_new(struct netif *pppif, const struct link_callbacks *callbacks, void *link_ctx_cb, ppp_link_status_cb_fn link_status_cb, void *ctx_cb) {
|
|
ppp_pcb *pcb;
|
|
|
|
/* PPP is single-threaded: without a callback,
|
|
* there is no way to know when the link is up. */
|
|
if (link_status_cb == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
pcb = (ppp_pcb*)memp_malloc(MEMP_PPP_PCB);
|
|
if (pcb == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
memset(pcb, 0, sizeof(ppp_pcb));
|
|
|
|
/* default configuration */
|
|
#if LWIP_DNS
|
|
pcb->settings.usepeerdns = 1;
|
|
#endif /* LWIP_DNS */
|
|
|
|
#if PAP_SUPPORT
|
|
pcb->settings.pap_timeout_time = UPAP_DEFTIMEOUT;
|
|
pcb->settings.pap_max_transmits = UPAP_DEFTRANSMITS;
|
|
#if PPP_SERVER
|
|
pcb->settings.pap_req_timeout = UPAP_DEFREQTIME;
|
|
#endif /* PPP_SERVER */
|
|
#endif /* PAP_SUPPORT */
|
|
|
|
#if CHAP_SUPPORT
|
|
pcb->settings.chap_timeout_time = CHAP_DEFTIMEOUT;
|
|
pcb->settings.chap_max_transmits = CHAP_DEFTRANSMITS;
|
|
#if PPP_SERVER
|
|
pcb->settings.chap_rechallenge_time = CHAP_DEFRECHALLENGETIME;
|
|
#endif /* PPP_SERVER */
|
|
#endif /* CHAP_SUPPPORT */
|
|
|
|
#if EAP_SUPPORT
|
|
pcb->settings.eap_req_time = EAP_DEFREQTIME;
|
|
pcb->settings.eap_allow_req = EAP_DEFALLOWREQ;
|
|
#if PPP_SERVER
|
|
pcb->settings.eap_timeout_time = EAP_DEFTIMEOUT;
|
|
pcb->settings.eap_max_transmits = EAP_DEFTRANSMITS;
|
|
#endif /* PPP_SERVER */
|
|
#endif /* EAP_SUPPORT */
|
|
|
|
#if MPPE_SUPPORT
|
|
pcb->settings.refuse_mppe_stateful = 1;
|
|
#endif /* MPPE_SUPPORT */
|
|
|
|
pcb->settings.lcp_loopbackfail = LCP_DEFLOOPBACKFAIL;
|
|
pcb->settings.lcp_echo_interval = LCP_ECHOINTERVAL;
|
|
pcb->settings.lcp_echo_fails = LCP_MAXECHOFAILS;
|
|
|
|
pcb->settings.fsm_timeout_time = FSM_DEFTIMEOUT;
|
|
pcb->settings.fsm_max_conf_req_transmits = FSM_DEFMAXCONFREQS;
|
|
pcb->settings.fsm_max_term_transmits = FSM_DEFMAXTERMREQS;
|
|
pcb->settings.fsm_max_nak_loops = FSM_DEFMAXNAKLOOPS;
|
|
|
|
pcb->netif = pppif;
|
|
MIB2_INIT_NETIF(pppif, snmp_ifType_ppp, 0);
|
|
if (!netif_add(pcb->netif,
|
|
#if LWIP_IPV4
|
|
IP4_ADDR_ANY, IP4_ADDR_BROADCAST, IP4_ADDR_ANY,
|
|
#endif /* LWIP_IPV4 */
|
|
(void *)pcb, ppp_netif_init_cb, NULL)) {
|
|
memp_free(MEMP_PPP_PCB, pcb);
|
|
PPPDEBUG(LOG_ERR, ("ppp_new: netif_add failed\n"));
|
|
return NULL;
|
|
}
|
|
|
|
pcb->link_cb = callbacks;
|
|
pcb->link_ctx_cb = link_ctx_cb;
|
|
pcb->link_status_cb = link_status_cb;
|
|
pcb->ctx_cb = ctx_cb;
|
|
new_phase(pcb, PPP_PHASE_DEAD);
|
|
return pcb;
|
|
}
|
|
|
|
/* Set a PPP PCB to its initial state */
|
|
void ppp_clear(ppp_pcb *pcb) {
|
|
const struct protent *protp;
|
|
int i;
|
|
|
|
LWIP_ASSERT("pcb->phase == PPP_PHASE_DEAD || pcb->phase == PPP_PHASE_HOLDOFF", pcb->phase == PPP_PHASE_DEAD || pcb->phase == PPP_PHASE_HOLDOFF);
|
|
|
|
#if PPP_STATS_SUPPORT
|
|
link_stats_valid = 0;
|
|
#endif /* PPP_STATS_SUPPORT */
|
|
|
|
memset(&pcb->phase, 0, sizeof(ppp_pcb) - ( (char*)&((ppp_pcb*)0)->phase - (char*)0 ) );
|
|
|
|
/*
|
|
* Initialize each protocol.
|
|
*/
|
|
for (i = 0; (protp = protocols[i]) != NULL; ++i) {
|
|
(*protp->init)(pcb);
|
|
}
|
|
|
|
#if VJ_SUPPORT && LWIP_TCP
|
|
vj_compress_init(&pcb->vj_comp);
|
|
#endif /* VJ_SUPPORT && LWIP_TCP */
|
|
|
|
new_phase(pcb, PPP_PHASE_INITIALIZE);
|
|
}
|
|
|
|
/** Initiate LCP open request */
|
|
void ppp_start(ppp_pcb *pcb) {
|
|
PPPDEBUG(LOG_DEBUG, ("ppp_start[%d]\n", pcb->netif->num));
|
|
lcp_open(pcb); /* Start protocol */
|
|
lcp_lowerup(pcb);
|
|
PPPDEBUG(LOG_DEBUG, ("ppp_start[%d]: finished\n", pcb->netif->num));
|
|
}
|
|
|
|
/** Called when link failed to setup */
|
|
void ppp_link_failed(ppp_pcb *pcb) {
|
|
PPPDEBUG(LOG_DEBUG, ("ppp_failed[%d]\n", pcb->netif->num));
|
|
new_phase(pcb, PPP_PHASE_DEAD);
|
|
pcb->err_code = PPPERR_OPEN;
|
|
pcb->link_status_cb(pcb, pcb->err_code, pcb->ctx_cb);
|
|
}
|
|
|
|
/** Called when link is normally down (i.e. it was asked to end) */
|
|
void ppp_link_end(ppp_pcb *pcb) {
|
|
PPPDEBUG(LOG_DEBUG, ("ppp_end[%d]\n", pcb->netif->num));
|
|
if (pcb->err_code == PPPERR_NONE) {
|
|
pcb->err_code = PPPERR_CONNECT;
|
|
}
|
|
pcb->link_status_cb(pcb, pcb->err_code, pcb->ctx_cb);
|
|
}
|
|
|
|
/*
|
|
* Pass the processed input packet to the appropriate handler.
|
|
* This function and all handlers run in the context of the tcpip_thread
|
|
*/
|
|
void ppp_input(ppp_pcb *pcb, struct pbuf *pb) {
|
|
u16_t protocol;
|
|
#if PPP_DEBUG && PPP_PROTOCOLNAME
|
|
const char *pname;
|
|
#endif /* PPP_DEBUG && PPP_PROTOCOLNAME */
|
|
|
|
magic_randomize();
|
|
|
|
if (pb->len < 2) {
|
|
PPPDEBUG(LOG_ERR, ("ppp_input[%d]: packet too short\n", pcb->netif->num));
|
|
goto drop;
|
|
}
|
|
protocol = (((u8_t *)pb->payload)[0] << 8) | ((u8_t*)pb->payload)[1];
|
|
|
|
#if PRINTPKT_SUPPORT
|
|
ppp_dump_packet("rcvd", (unsigned char *)pb->payload, pb->len);
|
|
#endif /* PRINTPKT_SUPPORT */
|
|
|
|
pbuf_header(pb, -(s16_t)sizeof(protocol));
|
|
|
|
LINK_STATS_INC(link.recv);
|
|
MIB2_STATS_NETIF_INC(pcb->netif, ifinucastpkts);
|
|
MIB2_STATS_NETIF_ADD(pcb->netif, ifinoctets, pb->tot_len);
|
|
|
|
/*
|
|
* Toss all non-LCP packets unless LCP is OPEN.
|
|
*/
|
|
if (protocol != PPP_LCP && pcb->lcp_fsm.state != PPP_FSM_OPENED) {
|
|
ppp_dbglog("Discarded non-LCP packet when LCP not open");
|
|
goto drop;
|
|
}
|
|
|
|
/*
|
|
* Until we get past the authentication phase, toss all packets
|
|
* except LCP, LQR and authentication packets.
|
|
*/
|
|
if (pcb->phase <= PPP_PHASE_AUTHENTICATE
|
|
&& !(protocol == PPP_LCP
|
|
#if LQR_SUPPORT
|
|
|| protocol == PPP_LQR
|
|
#endif /* LQR_SUPPORT */
|
|
#if PAP_SUPPORT
|
|
|| protocol == PPP_PAP
|
|
#endif /* PAP_SUPPORT */
|
|
#if CHAP_SUPPORT
|
|
|| protocol == PPP_CHAP
|
|
#endif /* CHAP_SUPPORT */
|
|
#if EAP_SUPPORT
|
|
|| protocol == PPP_EAP
|
|
#endif /* EAP_SUPPORT */
|
|
)) {
|
|
ppp_dbglog("discarding proto 0x%x in phase %d", protocol, pcb->phase);
|
|
goto drop;
|
|
}
|
|
|
|
#if CCP_SUPPORT
|
|
#if MPPE_SUPPORT
|
|
/*
|
|
* MPPE is required and unencrypted data has arrived (this
|
|
* should never happen!). We should probably drop the link if
|
|
* the protocol is in the range of what should be encrypted.
|
|
* At the least, we drop this packet.
|
|
*/
|
|
if (pcb->settings.require_mppe && protocol != PPP_COMP && protocol < 0x8000) {
|
|
PPPDEBUG(LOG_ERR, ("ppp_input[%d]: MPPE required, received unencrypted data!\n", pcb->netif->num));
|
|
goto drop;
|
|
}
|
|
#endif /* MPPE_SUPPORT */
|
|
|
|
if (protocol == PPP_COMP) {
|
|
u8_t *pl;
|
|
|
|
switch (pcb->ccp_receive_method) {
|
|
#if MPPE_SUPPORT
|
|
case CI_MPPE:
|
|
if (mppe_decompress(pcb, &pcb->mppe_decomp, &pb) != ERR_OK) {
|
|
goto drop;
|
|
}
|
|
break;
|
|
#endif /* MPPE_SUPPORT */
|
|
default:
|
|
PPPDEBUG(LOG_ERR, ("ppp_input[%d]: bad CCP receive method\n", pcb->netif->num));
|
|
goto drop; /* Cannot really happen, we only negotiate what we are able to do */
|
|
}
|
|
|
|
/* Assume no PFC */
|
|
if (pb->len < 2) {
|
|
goto drop;
|
|
}
|
|
|
|
/* Extract and hide protocol (do PFC decompression if necessary) */
|
|
pl = (u8_t*)pb->payload;
|
|
if (pl[0] & 0x01) {
|
|
protocol = pl[0];
|
|
pbuf_header(pb, -(s16_t)1);
|
|
} else {
|
|
protocol = (pl[0] << 8) | pl[1];
|
|
pbuf_header(pb, -(s16_t)2);
|
|
}
|
|
}
|
|
#endif /* CCP_SUPPORT */
|
|
|
|
switch(protocol) {
|
|
|
|
#if PPP_IPV4_SUPPORT
|
|
case PPP_IP: /* Internet Protocol */
|
|
PPPDEBUG(LOG_INFO, ("ppp_input[%d]: ip in pbuf len=%d\n", pcb->netif->num, pb->tot_len));
|
|
ip4_input(pb, pcb->netif);
|
|
return;
|
|
#endif /* PPP_IPV4_SUPPORT */
|
|
|
|
#if PPP_IPV6_SUPPORT
|
|
case PPP_IPV6: /* Internet Protocol Version 6 */
|
|
PPPDEBUG(LOG_INFO, ("ppp_input[%d]: ip6 in pbuf len=%d\n", pcb->netif->num, pb->tot_len));
|
|
ip6_input(pb, pcb->netif);
|
|
return;
|
|
#endif /* PPP_IPV6_SUPPORT */
|
|
|
|
#if VJ_SUPPORT && LWIP_TCP
|
|
case PPP_VJC_COMP: /* VJ compressed TCP */
|
|
/*
|
|
* Clip off the VJ header and prepend the rebuilt TCP/IP header and
|
|
* pass the result to IP.
|
|
*/
|
|
PPPDEBUG(LOG_INFO, ("ppp_input[%d]: vj_comp in pbuf len=%d\n", pcb->netif->num, pb->tot_len));
|
|
if (pcb->vj_enabled && vj_uncompress_tcp(&pb, &pcb->vj_comp) >= 0) {
|
|
ip4_input(pb, pcb->netif);
|
|
return;
|
|
}
|
|
/* Something's wrong so drop it. */
|
|
PPPDEBUG(LOG_WARNING, ("ppp_input[%d]: Dropping VJ compressed\n", pcb->netif->num));
|
|
break;
|
|
|
|
case PPP_VJC_UNCOMP: /* VJ uncompressed TCP */
|
|
/*
|
|
* Process the TCP/IP header for VJ header compression and then pass
|
|
* the packet to IP.
|
|
*/
|
|
PPPDEBUG(LOG_INFO, ("ppp_input[%d]: vj_un in pbuf len=%d\n", pcb->netif->num, pb->tot_len));
|
|
if (pcb->vj_enabled && vj_uncompress_uncomp(pb, &pcb->vj_comp) >= 0) {
|
|
ip4_input(pb, pcb->netif);
|
|
return;
|
|
}
|
|
/* Something's wrong so drop it. */
|
|
PPPDEBUG(LOG_WARNING, ("ppp_input[%d]: Dropping VJ uncompressed\n", pcb->netif->num));
|
|
break;
|
|
#endif /* VJ_SUPPORT && LWIP_TCP */
|
|
|
|
default: {
|
|
int i;
|
|
const struct protent *protp;
|
|
|
|
/*
|
|
* Upcall the proper protocol input routine.
|
|
*/
|
|
for (i = 0; (protp = protocols[i]) != NULL; ++i) {
|
|
if (protp->protocol == protocol) {
|
|
pb = ppp_singlebuf(pb);
|
|
(*protp->input)(pcb, (u8_t*)pb->payload, pb->len);
|
|
goto out;
|
|
}
|
|
#if 0 /* UNUSED
|
|
*
|
|
* This is actually a (hacked?) way for the Linux kernel to pass a data
|
|
* packet to pppd. pppd in normal condition only do signaling
|
|
* (LCP, PAP, CHAP, IPCP, ...) and does not handle any data packet at all.
|
|
*
|
|
* We don't even need this interface, which is only there because of PPP
|
|
* interface limitation between Linux kernel and pppd. For MPPE, which uses
|
|
* CCP to negotiate although it is not really a (de)compressor, we added
|
|
* ccp_resetrequest() in CCP and MPPE input data flow is calling either
|
|
* ccp_resetrequest() or lcp_close() if the issue is, respectively, non-fatal
|
|
* or fatal, this is what ccp_datainput() really do.
|
|
*/
|
|
if (protocol == (protp->protocol & ~0x8000)
|
|
&& protp->datainput != NULL) {
|
|
(*protp->datainput)(pcb, pb->payload, pb->len);
|
|
goto out;
|
|
}
|
|
#endif /* UNUSED */
|
|
}
|
|
|
|
#if PPP_DEBUG
|
|
#if PPP_PROTOCOLNAME
|
|
pname = protocol_name(protocol);
|
|
if (pname != NULL) {
|
|
ppp_warn("Unsupported protocol '%s' (0x%x) received", pname, protocol);
|
|
} else
|
|
#endif /* PPP_PROTOCOLNAME */
|
|
ppp_warn("Unsupported protocol 0x%x received", protocol);
|
|
#endif /* PPP_DEBUG */
|
|
pbuf_header(pb, (s16_t)sizeof(protocol));
|
|
lcp_sprotrej(pcb, (u8_t*)pb->payload, pb->len);
|
|
}
|
|
break;
|
|
}
|
|
|
|
drop:
|
|
LINK_STATS_INC(link.drop);
|
|
MIB2_STATS_NETIF_INC(pcb->netif, ifindiscards);
|
|
|
|
out:
|
|
pbuf_free(pb);
|
|
}
|
|
|
|
/* merge a pbuf chain into one pbuf */
|
|
struct pbuf *ppp_singlebuf(struct pbuf *p) {
|
|
struct pbuf *q, *b;
|
|
u8_t *pl;
|
|
|
|
if(p->tot_len == p->len) {
|
|
return p;
|
|
}
|
|
|
|
q = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
|
|
if(!q) {
|
|
PPPDEBUG(LOG_ERR,
|
|
("ppp_singlebuf: unable to alloc new buf (%d)\n", p->tot_len));
|
|
return p; /* live dangerously */
|
|
}
|
|
|
|
for(b = p, pl = (u8_t*)q->payload; b != NULL; b = b->next) {
|
|
MEMCPY(pl, b->payload, b->len);
|
|
pl += b->len;
|
|
}
|
|
|
|
pbuf_free(p);
|
|
|
|
return q;
|
|
}
|
|
|
|
/*
|
|
* Write a pbuf to a ppp link, only used from PPP functions
|
|
* to send PPP packets.
|
|
*
|
|
* IPv4 and IPv6 packets from lwIP are sent, respectively,
|
|
* with ppp_netif_output_ip4() and ppp_netif_output_ip6()
|
|
* functions (which are callbacks of the netif PPP interface).
|
|
*
|
|
* RETURN: >= 0 Number of characters written
|
|
* -1 Failed to write to device
|
|
*/
|
|
err_t ppp_write(ppp_pcb *pcb, struct pbuf *p) {
|
|
#if PRINTPKT_SUPPORT
|
|
ppp_dump_packet("sent", (unsigned char *)p->payload+2, p->len-2);
|
|
#endif /* PRINTPKT_SUPPORT */
|
|
return pcb->link_cb->write(pcb, pcb->link_ctx_cb, p);
|
|
}
|
|
|
|
void ppp_link_terminated(ppp_pcb *pcb) {
|
|
PPPDEBUG(LOG_DEBUG, ("ppp_link_terminated[%d]\n", pcb->netif->num));
|
|
pcb->link_cb->disconnect(pcb, pcb->link_ctx_cb);
|
|
PPPDEBUG(LOG_DEBUG, ("ppp_link_terminated[%d]: finished.\n", pcb->netif->num));
|
|
}
|
|
|
|
|
|
/************************************************************************
|
|
* Functions called by various PPP subsystems to configure
|
|
* the PPP interface or change the PPP phase.
|
|
*/
|
|
|
|
/*
|
|
* new_phase - signal the start of a new phase of pppd's operation.
|
|
*/
|
|
void new_phase(ppp_pcb *pcb, int p) {
|
|
pcb->phase = p;
|
|
PPPDEBUG(LOG_DEBUG, ("ppp phase changed[%d]: phase=%d\n", pcb->netif->num, pcb->phase));
|
|
#if PPP_NOTIFY_PHASE
|
|
if (pcb->notify_phase_cb != NULL) {
|
|
pcb->notify_phase_cb(pcb, p, pcb->ctx_cb);
|
|
}
|
|
#endif /* PPP_NOTIFY_PHASE */
|
|
}
|
|
|
|
/*
|
|
* ppp_send_config - configure the transmit-side characteristics of
|
|
* the ppp interface.
|
|
*/
|
|
int ppp_send_config(ppp_pcb *pcb, int mtu, u32_t accm, int pcomp, int accomp) {
|
|
LWIP_UNUSED_ARG(mtu);
|
|
/* pcb->mtu = mtu; -- set correctly with netif_set_mtu */
|
|
|
|
if (pcb->link_cb->send_config) {
|
|
pcb->link_cb->send_config(pcb, pcb->link_ctx_cb, accm, pcomp, accomp);
|
|
}
|
|
|
|
PPPDEBUG(LOG_INFO, ("ppp_send_config[%d]\n", pcb->netif->num) );
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* ppp_recv_config - configure the receive-side characteristics of
|
|
* the ppp interface.
|
|
*/
|
|
int ppp_recv_config(ppp_pcb *pcb, int mru, u32_t accm, int pcomp, int accomp) {
|
|
LWIP_UNUSED_ARG(mru);
|
|
|
|
if (pcb->link_cb->recv_config) {
|
|
pcb->link_cb->recv_config(pcb, pcb->link_ctx_cb, accm, pcomp, accomp);
|
|
}
|
|
|
|
PPPDEBUG(LOG_INFO, ("ppp_recv_config[%d]\n", pcb->netif->num));
|
|
return 0;
|
|
}
|
|
|
|
#if PPP_IPV4_SUPPORT
|
|
/*
|
|
* sifaddr - Config the interface IP addresses and netmask.
|
|
*/
|
|
int sifaddr(ppp_pcb *pcb, u32_t our_adr, u32_t his_adr, u32_t netmask) {
|
|
ip4_addr_t ip, nm, gw;
|
|
|
|
ip4_addr_set_u32(&ip, our_adr);
|
|
ip4_addr_set_u32(&nm, netmask);
|
|
ip4_addr_set_u32(&gw, his_adr);
|
|
netif_set_addr(pcb->netif, &ip, &nm, &gw);
|
|
return 1;
|
|
}
|
|
|
|
/********************************************************************
|
|
*
|
|
* cifaddr - Clear the interface IP addresses, and delete routes
|
|
* through the interface if possible.
|
|
*/
|
|
int cifaddr(ppp_pcb *pcb, u32_t our_adr, u32_t his_adr) {
|
|
LWIP_UNUSED_ARG(our_adr);
|
|
LWIP_UNUSED_ARG(his_adr);
|
|
|
|
netif_set_addr(pcb->netif, IP4_ADDR_ANY, IP4_ADDR_BROADCAST, IP4_ADDR_ANY);
|
|
return 1;
|
|
}
|
|
|
|
#if 0 /* UNUSED - PROXY ARP */
|
|
/********************************************************************
|
|
*
|
|
* sifproxyarp - Make a proxy ARP entry for the peer.
|
|
*/
|
|
|
|
int sifproxyarp(ppp_pcb *pcb, u32_t his_adr) {
|
|
LWIP_UNUSED_ARG(pcb);
|
|
LWIP_UNUSED_ARG(his_adr);
|
|
return 0;
|
|
}
|
|
|
|
/********************************************************************
|
|
*
|
|
* cifproxyarp - Delete the proxy ARP entry for the peer.
|
|
*/
|
|
|
|
int cifproxyarp(ppp_pcb *pcb, u32_t his_adr) {
|
|
LWIP_UNUSED_ARG(pcb);
|
|
LWIP_UNUSED_ARG(his_adr);
|
|
return 0;
|
|
}
|
|
#endif /* UNUSED - PROXY ARP */
|
|
|
|
#if LWIP_DNS
|
|
/*
|
|
* sdns - Config the DNS servers
|
|
*/
|
|
int sdns(ppp_pcb *pcb, u32_t ns1, u32_t ns2) {
|
|
ip_addr_t ns;
|
|
LWIP_UNUSED_ARG(pcb);
|
|
|
|
ip_addr_set_ip4_u32(&ns, ns1);
|
|
dns_setserver(0, &ns);
|
|
ip_addr_set_ip4_u32(&ns, ns2);
|
|
dns_setserver(1, &ns);
|
|
return 1;
|
|
}
|
|
|
|
/********************************************************************
|
|
*
|
|
* cdns - Clear the DNS servers
|
|
*/
|
|
int cdns(ppp_pcb *pcb, u32_t ns1, u32_t ns2) {
|
|
ip_addr_t nsa, nsb;
|
|
LWIP_UNUSED_ARG(pcb);
|
|
|
|
nsa = dns_getserver(0);
|
|
ip_addr_set_ip4_u32(&nsb, ns1);
|
|
if (ip_addr_cmp(&nsa, &nsb)) {
|
|
dns_setserver(0, IP_ADDR_ANY);
|
|
}
|
|
nsa = dns_getserver(1);
|
|
ip_addr_set_ip4_u32(&nsb, ns2);
|
|
if (ip_addr_cmp(&nsa, &nsb)) {
|
|
dns_setserver(1, IP_ADDR_ANY);
|
|
}
|
|
return 1;
|
|
}
|
|
#endif /* LWIP_DNS */
|
|
|
|
#if VJ_SUPPORT
|
|
/********************************************************************
|
|
*
|
|
* sifvjcomp - config tcp header compression
|
|
*/
|
|
int sifvjcomp(ppp_pcb *pcb, int vjcomp, int cidcomp, int maxcid) {
|
|
pcb->vj_enabled = vjcomp;
|
|
pcb->vj_comp.compressSlot = cidcomp;
|
|
pcb->vj_comp.maxSlotIndex = maxcid;
|
|
PPPDEBUG(LOG_INFO, ("sifvjcomp[%d]: VJ compress enable=%d slot=%d max slot=%d\n",
|
|
pcb->netif->num, vjcomp, cidcomp, maxcid));
|
|
return 0;
|
|
}
|
|
#endif /* VJ_SUPPORT */
|
|
|
|
/*
|
|
* sifup - Config the interface up and enable IP packets to pass.
|
|
*/
|
|
int sifup(ppp_pcb *pcb) {
|
|
pcb->if4_up = 1;
|
|
pcb->err_code = PPPERR_NONE;
|
|
netif_set_link_up(pcb->netif);
|
|
|
|
PPPDEBUG(LOG_DEBUG, ("sifup[%d]: err_code=%d\n", pcb->netif->num, pcb->err_code));
|
|
pcb->link_status_cb(pcb, pcb->err_code, pcb->ctx_cb);
|
|
return 1;
|
|
}
|
|
|
|
/********************************************************************
|
|
*
|
|
* sifdown - Disable the indicated protocol and config the interface
|
|
* down if there are no remaining protocols.
|
|
*/
|
|
int sifdown(ppp_pcb *pcb) {
|
|
|
|
pcb->if4_up = 0;
|
|
|
|
if (1
|
|
#if PPP_IPV6_SUPPORT
|
|
/* set the interface down if IPv6 is down as well */
|
|
&& !pcb->if6_up
|
|
#endif /* PPP_IPV6_SUPPORT */
|
|
) {
|
|
/* make sure the netif link callback is called */
|
|
netif_set_link_down(pcb->netif);
|
|
}
|
|
PPPDEBUG(LOG_DEBUG, ("sifdown[%d]: err_code=%d\n", pcb->netif->num, pcb->err_code));
|
|
return 1;
|
|
}
|
|
|
|
/********************************************************************
|
|
*
|
|
* Return user specified netmask, modified by any mask we might determine
|
|
* for address `addr' (in network byte order).
|
|
* Here we scan through the system's list of interfaces, looking for
|
|
* any non-point-to-point interfaces which might appear to be on the same
|
|
* network as `addr'. If we find any, we OR in their netmask to the
|
|
* user-specified netmask.
|
|
*/
|
|
u32_t get_mask(u32_t addr) {
|
|
#if 0
|
|
u32_t mask, nmask;
|
|
|
|
addr = htonl(addr);
|
|
if (IP_CLASSA(addr)) { /* determine network mask for address class */
|
|
nmask = IP_CLASSA_NET;
|
|
} else if (IP_CLASSB(addr)) {
|
|
nmask = IP_CLASSB_NET;
|
|
} else {
|
|
nmask = IP_CLASSC_NET;
|
|
}
|
|
|
|
/* class D nets are disallowed by bad_ip_adrs */
|
|
mask = PP_HTONL(0xffffff00UL) | htonl(nmask);
|
|
|
|
/* XXX
|
|
* Scan through the system's network interfaces.
|
|
* Get each netmask and OR them into our mask.
|
|
*/
|
|
/* return mask; */
|
|
return mask;
|
|
#endif /* 0 */
|
|
LWIP_UNUSED_ARG(addr);
|
|
return IPADDR_BROADCAST;
|
|
}
|
|
#endif /* PPP_IPV4_SUPPORT */
|
|
|
|
#if PPP_IPV6_SUPPORT
|
|
#define IN6_LLADDR_FROM_EUI64(ip6, eui64) do { \
|
|
ip6.addr[0] = PP_HTONL(0xfe800000); \
|
|
ip6.addr[1] = 0; \
|
|
eui64_copy(eui64, ip6.addr[2]); \
|
|
} while (0)
|
|
|
|
/********************************************************************
|
|
*
|
|
* sif6addr - Config the interface with an IPv6 link-local address
|
|
*/
|
|
int sif6addr(ppp_pcb *pcb, eui64_t our_eui64, eui64_t his_eui64) {
|
|
ip6_addr_t ip6;
|
|
LWIP_UNUSED_ARG(his_eui64);
|
|
|
|
IN6_LLADDR_FROM_EUI64(ip6, our_eui64);
|
|
netif_ip6_addr_set(pcb->netif, 0, &ip6);
|
|
netif_ip6_addr_set_state(pcb->netif, 0, IP6_ADDR_PREFERRED);
|
|
/* FIXME: should we add an IPv6 static neighbor using his_eui64 ? */
|
|
return 1;
|
|
}
|
|
|
|
/********************************************************************
|
|
*
|
|
* cif6addr - Remove IPv6 address from interface
|
|
*/
|
|
int cif6addr(ppp_pcb *pcb, eui64_t our_eui64, eui64_t his_eui64) {
|
|
LWIP_UNUSED_ARG(our_eui64);
|
|
LWIP_UNUSED_ARG(his_eui64);
|
|
|
|
netif_ip6_addr_set(pcb->netif, 0, IP6_ADDR_ANY6);
|
|
netif_ip6_addr_set_state(pcb->netif, 0, IP6_ADDR_INVALID);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* sif6up - Config the interface up and enable IPv6 packets to pass.
|
|
*/
|
|
int sif6up(ppp_pcb *pcb) {
|
|
|
|
pcb->if6_up = 1;
|
|
pcb->err_code = PPPERR_NONE;
|
|
netif_set_link_up(pcb->netif);
|
|
|
|
PPPDEBUG(LOG_DEBUG, ("sif6up[%d]: err_code=%d\n", pcb->netif->num, pcb->err_code));
|
|
pcb->link_status_cb(pcb, pcb->err_code, pcb->ctx_cb);
|
|
return 1;
|
|
}
|
|
|
|
/********************************************************************
|
|
*
|
|
* sif6down - Disable the indicated protocol and config the interface
|
|
* down if there are no remaining protocols.
|
|
*/
|
|
int sif6down(ppp_pcb *pcb) {
|
|
|
|
pcb->if6_up = 0;
|
|
|
|
if (1
|
|
#if PPP_IPV4_SUPPORT
|
|
/* set the interface down if IPv4 is down as well */
|
|
&& !pcb->if4_up
|
|
#endif /* PPP_IPV4_SUPPORT */
|
|
) {
|
|
/* make sure the netif link callback is called */
|
|
netif_set_link_down(pcb->netif);
|
|
}
|
|
PPPDEBUG(LOG_DEBUG, ("sif6down[%d]: err_code=%d\n", pcb->netif->num, pcb->err_code));
|
|
return 1;
|
|
}
|
|
#endif /* PPP_IPV6_SUPPORT */
|
|
|
|
#if DEMAND_SUPPORT
|
|
/*
|
|
* sifnpmode - Set the mode for handling packets for a given NP.
|
|
*/
|
|
int sifnpmode(ppp_pcb *pcb, int proto, enum NPmode mode) {
|
|
LWIP_UNUSED_ARG(pcb);
|
|
LWIP_UNUSED_ARG(proto);
|
|
LWIP_UNUSED_ARG(mode);
|
|
return 0;
|
|
}
|
|
#endif /* DEMAND_SUPPORT */
|
|
|
|
/*
|
|
* netif_set_mtu - set the MTU on the PPP network interface.
|
|
*/
|
|
void netif_set_mtu(ppp_pcb *pcb, int mtu) {
|
|
|
|
pcb->netif->mtu = mtu;
|
|
PPPDEBUG(LOG_INFO, ("netif_set_mtu[%d]: mtu=%d\n", pcb->netif->num, mtu));
|
|
}
|
|
|
|
/*
|
|
* netif_get_mtu - get PPP interface MTU
|
|
*/
|
|
int netif_get_mtu(ppp_pcb *pcb) {
|
|
|
|
return pcb->netif->mtu;
|
|
}
|
|
|
|
#if CCP_SUPPORT
|
|
#if 0 /* unused */
|
|
/*
|
|
* ccp_test - whether a given compression method is acceptable for use.
|
|
*/
|
|
int
|
|
ccp_test(ppp_pcb *pcb, u_char *opt_ptr, int opt_len, int for_transmit)
|
|
{
|
|
LWIP_UNUSED_ARG(pcb);
|
|
LWIP_UNUSED_ARG(opt_ptr);
|
|
LWIP_UNUSED_ARG(opt_len);
|
|
LWIP_UNUSED_ARG(for_transmit);
|
|
return -1;
|
|
}
|
|
#endif /* unused */
|
|
|
|
/*
|
|
* ccp_set - inform about the current state of CCP.
|
|
*/
|
|
void
|
|
ccp_set(ppp_pcb *pcb, u8_t isopen, u8_t isup, u8_t receive_method, u8_t transmit_method)
|
|
{
|
|
LWIP_UNUSED_ARG(isopen);
|
|
LWIP_UNUSED_ARG(isup);
|
|
pcb->ccp_receive_method = receive_method;
|
|
pcb->ccp_transmit_method = transmit_method;
|
|
PPPDEBUG(LOG_DEBUG, ("ccp_set[%d]: is_open=%d, is_up=%d, receive_method=%u, transmit_method=%u\n",
|
|
pcb->netif->num, isopen, isup, receive_method, transmit_method));
|
|
}
|
|
|
|
void
|
|
ccp_reset_comp(ppp_pcb *pcb)
|
|
{
|
|
switch (pcb->ccp_transmit_method) {
|
|
#if MPPE_SUPPORT
|
|
case CI_MPPE:
|
|
mppe_comp_reset(pcb, &pcb->mppe_comp);
|
|
break;
|
|
#endif /* MPPE_SUPPORT */
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
ccp_reset_decomp(ppp_pcb *pcb)
|
|
{
|
|
switch (pcb->ccp_receive_method) {
|
|
#if MPPE_SUPPORT
|
|
case CI_MPPE:
|
|
mppe_decomp_reset(pcb, &pcb->mppe_decomp);
|
|
break;
|
|
#endif /* MPPE_SUPPORT */
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
#if 0 /* unused */
|
|
/*
|
|
* ccp_fatal_error - returns 1 if decompression was disabled as a
|
|
* result of an error detected after decompression of a packet,
|
|
* 0 otherwise. This is necessary because of patent nonsense.
|
|
*/
|
|
int
|
|
ccp_fatal_error(ppp_pcb *pcb)
|
|
{
|
|
LWIP_UNUSED_ARG(pcb);
|
|
return 1;
|
|
}
|
|
#endif /* unused */
|
|
#endif /* CCP_SUPPORT */
|
|
|
|
#if PPP_IDLETIMELIMIT
|
|
/********************************************************************
|
|
*
|
|
* get_idle_time - return how long the link has been idle.
|
|
*/
|
|
int get_idle_time(ppp_pcb *pcb, struct ppp_idle *ip) {
|
|
/* FIXME: add idle time support and make it optional */
|
|
LWIP_UNUSED_ARG(pcb);
|
|
LWIP_UNUSED_ARG(ip);
|
|
return 1;
|
|
}
|
|
#endif /* PPP_IDLETIMELIMIT */
|
|
|
|
#if DEMAND_SUPPORT
|
|
/********************************************************************
|
|
*
|
|
* get_loop_output - get outgoing packets from the ppp device,
|
|
* and detect when we want to bring the real link up.
|
|
* Return value is 1 if we need to bring up the link, 0 otherwise.
|
|
*/
|
|
int get_loop_output(void) {
|
|
return 0;
|
|
}
|
|
#endif /* DEMAND_SUPPORT */
|
|
|
|
#if PPP_PROTOCOLNAME
|
|
/* List of protocol names, to make our messages a little more informative. */
|
|
struct protocol_list {
|
|
u_short proto;
|
|
const char *name;
|
|
} protocol_list[] = {
|
|
{ 0x21, "IP" },
|
|
{ 0x23, "OSI Network Layer" },
|
|
{ 0x25, "Xerox NS IDP" },
|
|
{ 0x27, "DECnet Phase IV" },
|
|
{ 0x29, "Appletalk" },
|
|
{ 0x2b, "Novell IPX" },
|
|
{ 0x2d, "VJ compressed TCP/IP" },
|
|
{ 0x2f, "VJ uncompressed TCP/IP" },
|
|
{ 0x31, "Bridging PDU" },
|
|
{ 0x33, "Stream Protocol ST-II" },
|
|
{ 0x35, "Banyan Vines" },
|
|
{ 0x39, "AppleTalk EDDP" },
|
|
{ 0x3b, "AppleTalk SmartBuffered" },
|
|
{ 0x3d, "Multi-Link" },
|
|
{ 0x3f, "NETBIOS Framing" },
|
|
{ 0x41, "Cisco Systems" },
|
|
{ 0x43, "Ascom Timeplex" },
|
|
{ 0x45, "Fujitsu Link Backup and Load Balancing (LBLB)" },
|
|
{ 0x47, "DCA Remote Lan" },
|
|
{ 0x49, "Serial Data Transport Protocol (PPP-SDTP)" },
|
|
{ 0x4b, "SNA over 802.2" },
|
|
{ 0x4d, "SNA" },
|
|
{ 0x4f, "IP6 Header Compression" },
|
|
{ 0x51, "KNX Bridging Data" },
|
|
{ 0x53, "Encryption" },
|
|
{ 0x55, "Individual Link Encryption" },
|
|
{ 0x57, "IPv6" },
|
|
{ 0x59, "PPP Muxing" },
|
|
{ 0x5b, "Vendor-Specific Network Protocol" },
|
|
{ 0x61, "RTP IPHC Full Header" },
|
|
{ 0x63, "RTP IPHC Compressed TCP" },
|
|
{ 0x65, "RTP IPHC Compressed non-TCP" },
|
|
{ 0x67, "RTP IPHC Compressed UDP 8" },
|
|
{ 0x69, "RTP IPHC Compressed RTP 8" },
|
|
{ 0x6f, "Stampede Bridging" },
|
|
{ 0x73, "MP+" },
|
|
{ 0xc1, "NTCITS IPI" },
|
|
{ 0xfb, "single-link compression" },
|
|
{ 0xfd, "Compressed Datagram" },
|
|
{ 0x0201, "802.1d Hello Packets" },
|
|
{ 0x0203, "IBM Source Routing BPDU" },
|
|
{ 0x0205, "DEC LANBridge100 Spanning Tree" },
|
|
{ 0x0207, "Cisco Discovery Protocol" },
|
|
{ 0x0209, "Netcs Twin Routing" },
|
|
{ 0x020b, "STP - Scheduled Transfer Protocol" },
|
|
{ 0x020d, "EDP - Extreme Discovery Protocol" },
|
|
{ 0x0211, "Optical Supervisory Channel Protocol" },
|
|
{ 0x0213, "Optical Supervisory Channel Protocol" },
|
|
{ 0x0231, "Luxcom" },
|
|
{ 0x0233, "Sigma Network Systems" },
|
|
{ 0x0235, "Apple Client Server Protocol" },
|
|
{ 0x0281, "MPLS Unicast" },
|
|
{ 0x0283, "MPLS Multicast" },
|
|
{ 0x0285, "IEEE p1284.4 standard - data packets" },
|
|
{ 0x0287, "ETSI TETRA Network Protocol Type 1" },
|
|
{ 0x0289, "Multichannel Flow Treatment Protocol" },
|
|
{ 0x2063, "RTP IPHC Compressed TCP No Delta" },
|
|
{ 0x2065, "RTP IPHC Context State" },
|
|
{ 0x2067, "RTP IPHC Compressed UDP 16" },
|
|
{ 0x2069, "RTP IPHC Compressed RTP 16" },
|
|
{ 0x4001, "Cray Communications Control Protocol" },
|
|
{ 0x4003, "CDPD Mobile Network Registration Protocol" },
|
|
{ 0x4005, "Expand accelerator protocol" },
|
|
{ 0x4007, "ODSICP NCP" },
|
|
{ 0x4009, "DOCSIS DLL" },
|
|
{ 0x400B, "Cetacean Network Detection Protocol" },
|
|
{ 0x4021, "Stacker LZS" },
|
|
{ 0x4023, "RefTek Protocol" },
|
|
{ 0x4025, "Fibre Channel" },
|
|
{ 0x4027, "EMIT Protocols" },
|
|
{ 0x405b, "Vendor-Specific Protocol (VSP)" },
|
|
{ 0x8021, "Internet Protocol Control Protocol" },
|
|
{ 0x8023, "OSI Network Layer Control Protocol" },
|
|
{ 0x8025, "Xerox NS IDP Control Protocol" },
|
|
{ 0x8027, "DECnet Phase IV Control Protocol" },
|
|
{ 0x8029, "Appletalk Control Protocol" },
|
|
{ 0x802b, "Novell IPX Control Protocol" },
|
|
{ 0x8031, "Bridging NCP" },
|
|
{ 0x8033, "Stream Protocol Control Protocol" },
|
|
{ 0x8035, "Banyan Vines Control Protocol" },
|
|
{ 0x803d, "Multi-Link Control Protocol" },
|
|
{ 0x803f, "NETBIOS Framing Control Protocol" },
|
|
{ 0x8041, "Cisco Systems Control Protocol" },
|
|
{ 0x8043, "Ascom Timeplex" },
|
|
{ 0x8045, "Fujitsu LBLB Control Protocol" },
|
|
{ 0x8047, "DCA Remote Lan Network Control Protocol (RLNCP)" },
|
|
{ 0x8049, "Serial Data Control Protocol (PPP-SDCP)" },
|
|
{ 0x804b, "SNA over 802.2 Control Protocol" },
|
|
{ 0x804d, "SNA Control Protocol" },
|
|
{ 0x804f, "IP6 Header Compression Control Protocol" },
|
|
{ 0x8051, "KNX Bridging Control Protocol" },
|
|
{ 0x8053, "Encryption Control Protocol" },
|
|
{ 0x8055, "Individual Link Encryption Control Protocol" },
|
|
{ 0x8057, "IPv6 Control Protocol" },
|
|
{ 0x8059, "PPP Muxing Control Protocol" },
|
|
{ 0x805b, "Vendor-Specific Network Control Protocol (VSNCP)" },
|
|
{ 0x806f, "Stampede Bridging Control Protocol" },
|
|
{ 0x8073, "MP+ Control Protocol" },
|
|
{ 0x80c1, "NTCITS IPI Control Protocol" },
|
|
{ 0x80fb, "Single Link Compression Control Protocol" },
|
|
{ 0x80fd, "Compression Control Protocol" },
|
|
{ 0x8207, "Cisco Discovery Protocol Control" },
|
|
{ 0x8209, "Netcs Twin Routing" },
|
|
{ 0x820b, "STP - Control Protocol" },
|
|
{ 0x820d, "EDPCP - Extreme Discovery Protocol Ctrl Prtcl" },
|
|
{ 0x8235, "Apple Client Server Protocol Control" },
|
|
{ 0x8281, "MPLSCP" },
|
|
{ 0x8285, "IEEE p1284.4 standard - Protocol Control" },
|
|
{ 0x8287, "ETSI TETRA TNP1 Control Protocol" },
|
|
{ 0x8289, "Multichannel Flow Treatment Protocol" },
|
|
{ 0xc021, "Link Control Protocol" },
|
|
{ 0xc023, "Password Authentication Protocol" },
|
|
{ 0xc025, "Link Quality Report" },
|
|
{ 0xc027, "Shiva Password Authentication Protocol" },
|
|
{ 0xc029, "CallBack Control Protocol (CBCP)" },
|
|
{ 0xc02b, "BACP Bandwidth Allocation Control Protocol" },
|
|
{ 0xc02d, "BAP" },
|
|
{ 0xc05b, "Vendor-Specific Authentication Protocol (VSAP)" },
|
|
{ 0xc081, "Container Control Protocol" },
|
|
{ 0xc223, "Challenge Handshake Authentication Protocol" },
|
|
{ 0xc225, "RSA Authentication Protocol" },
|
|
{ 0xc227, "Extensible Authentication Protocol" },
|
|
{ 0xc229, "Mitsubishi Security Info Exch Ptcl (SIEP)" },
|
|
{ 0xc26f, "Stampede Bridging Authorization Protocol" },
|
|
{ 0xc281, "Proprietary Authentication Protocol" },
|
|
{ 0xc283, "Proprietary Authentication Protocol" },
|
|
{ 0xc481, "Proprietary Node ID Authentication Protocol" },
|
|
{ 0, NULL },
|
|
};
|
|
|
|
/*
|
|
* protocol_name - find a name for a PPP protocol.
|
|
*/
|
|
const char * protocol_name(int proto) {
|
|
struct protocol_list *lp;
|
|
|
|
for (lp = protocol_list; lp->proto != 0; ++lp) {
|
|
if (proto == lp->proto) {
|
|
return lp->name;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
#endif /* PPP_PROTOCOLNAME */
|
|
|
|
#if PPP_STATS_SUPPORT
|
|
|
|
/* ---- Note on PPP Stats support ----
|
|
*
|
|
* The one willing link stats support should add the get_ppp_stats()
|
|
* to fetch statistics from lwIP.
|
|
*/
|
|
|
|
/*
|
|
* reset_link_stats - "reset" stats when link goes up.
|
|
*/
|
|
void reset_link_stats(int u) {
|
|
if (!get_ppp_stats(u, &old_link_stats)) {
|
|
return;
|
|
}
|
|
gettimeofday(&start_time, NULL);
|
|
}
|
|
|
|
/*
|
|
* update_link_stats - get stats at link termination.
|
|
*/
|
|
void update_link_stats(int u) {
|
|
struct timeval now;
|
|
char numbuf[32];
|
|
|
|
if (!get_ppp_stats(u, &link_stats) || gettimeofday(&now, NULL) < 0) {
|
|
return;
|
|
}
|
|
link_connect_time = now.tv_sec - start_time.tv_sec;
|
|
link_stats_valid = 1;
|
|
|
|
link_stats.bytes_in -= old_link_stats.bytes_in;
|
|
link_stats.bytes_out -= old_link_stats.bytes_out;
|
|
link_stats.pkts_in -= old_link_stats.pkts_in;
|
|
link_stats.pkts_out -= old_link_stats.pkts_out;
|
|
}
|
|
|
|
void print_link_stats() {
|
|
/*
|
|
* Print connect time and statistics.
|
|
*/
|
|
if (link_stats_valid) {
|
|
int t = (link_connect_time + 5) / 6; /* 1/10ths of minutes */
|
|
info("Connect time %d.%d minutes.", t/10, t%10);
|
|
info("Sent %u bytes, received %u bytes.", link_stats.bytes_out, link_stats.bytes_in);
|
|
link_stats_valid = 0;
|
|
}
|
|
}
|
|
#endif /* PPP_STATS_SUPPORT */
|
|
|
|
#endif /* PPP_SUPPORT */
|