/***************************************************************************** * ppp.c - Network Point to Point Protocol program file. * * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. * portions Copyright (c) 1997 by Global Election Systems Inc. * * The authors hereby grant permission to use, copy, modify, distribute, * and license this software and its documentation for any purpose, provided * that existing copyright notices are retained in all copies and that this * notice and the following disclaimer are included verbatim in any * distributions. No written agreement, license, or royalty fee is required * for any of the authorized uses. * * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************** * REVISION HISTORY * * 03-01-01 Marc Boucher * Ported to lwIP. * 97-11-05 Guy Lancaster , Global Election Systems Inc. * Original. *****************************************************************************/ /* * ppp_defs.h - PPP definitions. * * if_pppvar.h - private structures and declarations for PPP. * * Copyright (c) 1994 The Australian National University. * All rights reserved. * * Permission to use, copy, modify, and distribute this software and its * documentation is hereby granted, provided that the above copyright * notice appears in all copies. This software is provided without any * warranty, express or implied. The Australian National University * makes no representations about the suitability of this software for * any purpose. * * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY * OF SUCH DAMAGE. * * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, * OR MODIFICATIONS. */ /* * if_ppp.h - Point-to-Point Protocol definitions. * * Copyright (c) 1989 Carnegie Mellon University. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that the above copyright notice and this paragraph are * duplicated in all such forms and that any documentation, * advertising materials, and other materials related to such * distribution and use acknowledge that the software was developed * by Carnegie Mellon University. The name of the * University may not be used to endorse or promote products derived * from this software without specific prior written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ /** * @defgroup ppp PPP * @ingroup netifs * @verbinclude "ppp.txt" */ #include "netif/ppp/ppp_opts.h" #if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */ #include "lwip/pbuf.h" #include "lwip/stats.h" #include "lwip/sys.h" #include "lwip/tcpip.h" #include "lwip/api.h" #include "lwip/snmp.h" #include "lwip/ip4.h" /* for ip4_input() */ #if PPP_IPV6_SUPPORT #include "lwip/ip6.h" /* for ip6_input() */ #endif /* PPP_IPV6_SUPPORT */ #include "lwip/dns.h" #include "netif/ppp/ppp_impl.h" #include "netif/ppp/pppos.h" #include "netif/ppp/fsm.h" #include "netif/ppp/lcp.h" #include "netif/ppp/magic.h" #if PAP_SUPPORT #include "netif/ppp/upap.h" #endif /* PAP_SUPPORT */ #if CHAP_SUPPORT #include "netif/ppp/chap-new.h" #endif /* CHAP_SUPPORT */ #if EAP_SUPPORT #include "netif/ppp/eap.h" #endif /* EAP_SUPPORT */ #if CCP_SUPPORT #include "netif/ppp/ccp.h" #endif /* CCP_SUPPORT */ #if MPPE_SUPPORT #include "netif/ppp/mppe.h" #endif /* MPPE_SUPPORT */ #if ECP_SUPPORT #include "netif/ppp/ecp.h" #endif /* EAP_SUPPORT */ #if VJ_SUPPORT #include "netif/ppp/vj.h" #endif /* VJ_SUPPORT */ #if PPP_IPV4_SUPPORT #include "netif/ppp/ipcp.h" #endif /* PPP_IPV4_SUPPORT */ #if PPP_IPV6_SUPPORT #include "netif/ppp/ipv6cp.h" #endif /* PPP_IPV6_SUPPORT */ /*************************/ /*** LOCAL DEFINITIONS ***/ /*************************/ /* Memory pools */ #if PPPOS_SUPPORT LWIP_MEMPOOL_PROTOTYPE(PPPOS_PCB); #endif #if PPPOE_SUPPORT LWIP_MEMPOOL_PROTOTYPE(PPPOE_IF); #endif #if PPPOL2TP_SUPPORT LWIP_MEMPOOL_PROTOTYPE(PPPOL2TP_PCB); #endif #if LWIP_PPP_API && LWIP_MPU_COMPATIBLE LWIP_MEMPOOL_PROTOTYPE(PPPAPI_MSG); #endif LWIP_MEMPOOL_DECLARE(PPP_PCB, MEMP_NUM_PPP_PCB, sizeof(ppp_pcb), "PPP_PCB") /* FIXME: add stats per PPP session */ #if PPP_STATS_SUPPORT static struct timeval start_time; /* Time when link was started. */ static struct pppd_stats old_link_stats; struct pppd_stats link_stats; unsigned link_connect_time; int link_stats_valid; #endif /* PPP_STATS_SUPPORT */ /* * PPP Data Link Layer "protocol" table. * One entry per supported protocol. * The last entry must be NULL. */ const struct protent* const protocols[] = { &lcp_protent, #if PAP_SUPPORT &pap_protent, #endif /* PAP_SUPPORT */ #if CHAP_SUPPORT &chap_protent, #endif /* CHAP_SUPPORT */ #if CBCP_SUPPORT &cbcp_protent, #endif /* CBCP_SUPPORT */ #if PPP_IPV4_SUPPORT &ipcp_protent, #endif /* PPP_IPV4_SUPPORT */ #if PPP_IPV6_SUPPORT &ipv6cp_protent, #endif /* PPP_IPV6_SUPPORT */ #if CCP_SUPPORT &ccp_protent, #endif /* CCP_SUPPORT */ #if ECP_SUPPORT &ecp_protent, #endif /* ECP_SUPPORT */ #ifdef AT_CHANGE &atcp_protent, #endif /* AT_CHANGE */ #if EAP_SUPPORT &eap_protent, #endif /* EAP_SUPPORT */ NULL }; /* Prototypes for procedures local to this file. */ static void ppp_do_connect(void *arg); static err_t ppp_netif_init_cb(struct netif *netif); #if PPP_IPV4_SUPPORT static err_t ppp_netif_output_ip4(struct netif *netif, struct pbuf *pb, const ip4_addr_t *ipaddr); #endif /* PPP_IPV4_SUPPORT */ #if PPP_IPV6_SUPPORT static err_t ppp_netif_output_ip6(struct netif *netif, struct pbuf *pb, const ip6_addr_t *ipaddr); #endif /* PPP_IPV6_SUPPORT */ static err_t ppp_netif_output(struct netif *netif, struct pbuf *pb, u16_t protocol); /***********************************/ /*** PUBLIC FUNCTION DEFINITIONS ***/ /***********************************/ #if PPP_AUTH_SUPPORT void ppp_set_auth(ppp_pcb *pcb, u8_t authtype, const char *user, const char *passwd) { LWIP_ASSERT_CORE_LOCKED(); #if PAP_SUPPORT pcb->settings.refuse_pap = !(authtype & PPPAUTHTYPE_PAP); #endif /* PAP_SUPPORT */ #if CHAP_SUPPORT pcb->settings.refuse_chap = !(authtype & PPPAUTHTYPE_CHAP); #if MSCHAP_SUPPORT pcb->settings.refuse_mschap = !(authtype & PPPAUTHTYPE_MSCHAP); pcb->settings.refuse_mschap_v2 = !(authtype & PPPAUTHTYPE_MSCHAP_V2); #endif /* MSCHAP_SUPPORT */ #endif /* CHAP_SUPPORT */ #if EAP_SUPPORT pcb->settings.refuse_eap = !(authtype & PPPAUTHTYPE_EAP); #endif /* EAP_SUPPORT */ pcb->settings.user = user; pcb->settings.passwd = passwd; } #endif /* PPP_AUTH_SUPPORT */ #if MPPE_SUPPORT /* Set MPPE configuration */ void ppp_set_mppe(ppp_pcb *pcb, u8_t flags) { if (flags == PPP_MPPE_DISABLE) { pcb->settings.require_mppe = 0; return; } pcb->settings.require_mppe = 1; pcb->settings.refuse_mppe_stateful = !(flags & PPP_MPPE_ALLOW_STATEFUL); pcb->settings.refuse_mppe_40 = !!(flags & PPP_MPPE_REFUSE_40); pcb->settings.refuse_mppe_128 = !!(flags & PPP_MPPE_REFUSE_128); } #endif /* MPPE_SUPPORT */ #if PPP_NOTIFY_PHASE void ppp_set_notify_phase_callback(ppp_pcb *pcb, ppp_notify_phase_cb_fn notify_phase_cb) { pcb->notify_phase_cb = notify_phase_cb; notify_phase_cb(pcb, pcb->phase, pcb->ctx_cb); } #endif /* PPP_NOTIFY_PHASE */ /* * Initiate a PPP connection. * * This can only be called if PPP is in the dead phase. * * Holdoff is the time to wait (in seconds) before initiating * the connection. * * If this port connects to a modem, the modem connection must be * established before calling this. */ err_t ppp_connect(ppp_pcb *pcb, u16_t holdoff) { LWIP_ASSERT_CORE_LOCKED(); if (pcb->phase != PPP_PHASE_DEAD) { return ERR_ALREADY; } PPPDEBUG(LOG_DEBUG, ("ppp_connect[%d]: holdoff=%d\n", pcb->netif->num, holdoff)); magic_randomize(); if (holdoff == 0) { ppp_do_connect(pcb); return ERR_OK; } new_phase(pcb, PPP_PHASE_HOLDOFF); sys_timeout((u32_t)(holdoff*1000), ppp_do_connect, pcb); return ERR_OK; } #if PPP_SERVER /* * Listen for an incoming PPP connection. * * This can only be called if PPP is in the dead phase. * * If this port connects to a modem, the modem connection must be * established before calling this. */ err_t ppp_listen(ppp_pcb *pcb) { LWIP_ASSERT_CORE_LOCKED(); if (pcb->phase != PPP_PHASE_DEAD) { return ERR_ALREADY; } PPPDEBUG(LOG_DEBUG, ("ppp_listen[%d]\n", pcb->netif->num)); magic_randomize(); if (pcb->link_cb->listen) { new_phase(pcb, PPP_PHASE_INITIALIZE); pcb->link_cb->listen(pcb, pcb->link_ctx_cb); return ERR_OK; } return ERR_IF; } #endif /* PPP_SERVER */ /* * Initiate the end of a PPP connection. * Any outstanding packets in the queues are dropped. * * Setting nocarrier to 1 close the PPP connection without initiating the * shutdown procedure. Always using nocarrier = 0 is still recommended, * this is going to take a little longer time if your link is down, but * is a safer choice for the PPP state machine. * * Return 0 on success, an error code on failure. */ err_t ppp_close(ppp_pcb *pcb, u8_t nocarrier) { LWIP_ASSERT_CORE_LOCKED(); pcb->err_code = PPPERR_USER; /* holdoff phase, cancel the reconnection */ if (pcb->phase == PPP_PHASE_HOLDOFF) { sys_untimeout(ppp_do_connect, pcb); new_phase(pcb, PPP_PHASE_DEAD); } /* dead phase, nothing to do, call the status callback to be consistent */ if (pcb->phase == PPP_PHASE_DEAD) { pcb->link_status_cb(pcb, pcb->err_code, pcb->ctx_cb); return ERR_OK; } /* Already terminating, nothing to do */ if (pcb->phase >= PPP_PHASE_TERMINATE) { return ERR_INPROGRESS; } /* LCP not open, close link protocol */ if (pcb->phase < PPP_PHASE_ESTABLISH) { new_phase(pcb, PPP_PHASE_DISCONNECT); ppp_link_terminated(pcb); return ERR_OK; } /* * Only accept carrier lost signal on the stable running phase in order * to prevent changing the PPP phase FSM in transition phases. * * Always using nocarrier = 0 is still recommended, this is going to * take a little longer time, but is a safer choice from FSM point of view. */ if (nocarrier && pcb->phase == PPP_PHASE_RUNNING) { PPPDEBUG(LOG_DEBUG, ("ppp_close[%d]: carrier lost -> lcp_lowerdown\n", pcb->netif->num)); lcp_lowerdown(pcb); /* forced link termination, this will force link protocol to disconnect. */ link_terminated(pcb); return ERR_OK; } /* Disconnect */ PPPDEBUG(LOG_DEBUG, ("ppp_close[%d]: kill_link -> lcp_close\n", pcb->netif->num)); /* LCP soft close request. */ lcp_close(pcb, "User request"); return ERR_OK; } /* * Release the control block. * * This can only be called if PPP is in the dead phase. * * You must use ppp_close() before if you wish to terminate * an established PPP session. * * Return 0 on success, an error code on failure. */ err_t ppp_free(ppp_pcb *pcb) { err_t err; LWIP_ASSERT_CORE_LOCKED(); if (pcb->phase != PPP_PHASE_DEAD) { return ERR_CONN; } PPPDEBUG(LOG_DEBUG, ("ppp_free[%d]\n", pcb->netif->num)); netif_remove(pcb->netif); err = pcb->link_cb->free(pcb, pcb->link_ctx_cb); LWIP_MEMPOOL_FREE(PPP_PCB, pcb); return err; } /* Get and set parameters for the given connection. * Return 0 on success, an error code on failure. */ err_t ppp_ioctl(ppp_pcb *pcb, u8_t cmd, void *arg) { LWIP_ASSERT_CORE_LOCKED(); if (pcb == NULL) { return ERR_VAL; } switch(cmd) { case PPPCTLG_UPSTATUS: /* Get the PPP up status. */ if (!arg) { goto fail; } *(int *)arg = (int)(0 #if PPP_IPV4_SUPPORT || pcb->if4_up #endif /* PPP_IPV4_SUPPORT */ #if PPP_IPV6_SUPPORT || pcb->if6_up #endif /* PPP_IPV6_SUPPORT */ ); return ERR_OK; case PPPCTLG_ERRCODE: /* Get the PPP error code. */ if (!arg) { goto fail; } *(int *)arg = (int)(pcb->err_code); return ERR_OK; default: goto fail; } fail: return ERR_VAL; } /**********************************/ /*** LOCAL FUNCTION DEFINITIONS ***/ /**********************************/ static void ppp_do_connect(void *arg) { ppp_pcb *pcb = (ppp_pcb*)arg; LWIP_ASSERT("pcb->phase == PPP_PHASE_DEAD || pcb->phase == PPP_PHASE_HOLDOFF", pcb->phase == PPP_PHASE_DEAD || pcb->phase == PPP_PHASE_HOLDOFF); new_phase(pcb, PPP_PHASE_INITIALIZE); pcb->link_cb->connect(pcb, pcb->link_ctx_cb); } /* * ppp_netif_init_cb - netif init callback */ static err_t ppp_netif_init_cb(struct netif *netif) { netif->name[0] = 'p'; netif->name[1] = 'p'; #if PPP_IPV4_SUPPORT netif->output = ppp_netif_output_ip4; #endif /* PPP_IPV4_SUPPORT */ #if PPP_IPV6_SUPPORT netif->output_ip6 = ppp_netif_output_ip6; #endif /* PPP_IPV6_SUPPORT */ netif->flags = NETIF_FLAG_UP; #if LWIP_NETIF_HOSTNAME /* @todo: Initialize interface hostname */ /* netif_set_hostname(netif, "lwip"); */ #endif /* LWIP_NETIF_HOSTNAME */ return ERR_OK; } #if PPP_IPV4_SUPPORT /* * Send an IPv4 packet on the given connection. */ static err_t ppp_netif_output_ip4(struct netif *netif, struct pbuf *pb, const ip4_addr_t *ipaddr) { LWIP_UNUSED_ARG(ipaddr); return ppp_netif_output(netif, pb, PPP_IP); } #endif /* PPP_IPV4_SUPPORT */ #if PPP_IPV6_SUPPORT /* * Send an IPv6 packet on the given connection. */ static err_t ppp_netif_output_ip6(struct netif *netif, struct pbuf *pb, const ip6_addr_t *ipaddr) { LWIP_UNUSED_ARG(ipaddr); return ppp_netif_output(netif, pb, PPP_IPV6); } #endif /* PPP_IPV6_SUPPORT */ static err_t ppp_netif_output(struct netif *netif, struct pbuf *pb, u16_t protocol) { ppp_pcb *pcb = (ppp_pcb*)netif->state; err_t err; struct pbuf *fpb = NULL; /* Check that the link is up. */ if (0 #if PPP_IPV4_SUPPORT || (protocol == PPP_IP && !pcb->if4_up) #endif /* PPP_IPV4_SUPPORT */ #if PPP_IPV6_SUPPORT || (protocol == PPP_IPV6 && !pcb->if6_up) #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 /* * 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 */ #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) { #if PPPOS_SUPPORT LWIP_MEMPOOL_INIT(PPPOS_PCB); #endif #if PPPOE_SUPPORT LWIP_MEMPOOL_INIT(PPPOE_IF); #endif #if PPPOL2TP_SUPPORT LWIP_MEMPOOL_INIT(PPPOL2TP_PCB); #endif #if LWIP_PPP_API && LWIP_MPU_COMPATIBLE LWIP_MEMPOOL_INIT(PPPAPI_MSG); #endif LWIP_MEMPOOL_INIT(PPP_PCB); /* * 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; const struct protent *protp; int i; /* 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*)LWIP_MEMPOOL_ALLOC(PPP_PCB); if (pcb == NULL) { return NULL; } memset(pcb, 0, sizeof(ppp_pcb)); /* default configuration */ #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 */ 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_ANY4, IP4_ADDR_BROADCAST, IP4_ADDR_ANY4, #endif /* LWIP_IPV4 */ (void *)pcb, ppp_netif_init_cb, NULL)) { LWIP_MEMPOOL_FREE(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; /* * Initialize each protocol. */ for (i = 0; (protp = protocols[i]) != NULL; ++i) { (*protp->init)(pcb); } new_phase(pcb, PPP_PHASE_DEAD); return pcb; } /** Initiate LCP open request */ void ppp_start(ppp_pcb *pcb) { PPPDEBUG(LOG_DEBUG, ("ppp_start[%d]\n", pcb->netif->num)); /* Clean data not taken care by anything else, mostly shared data. */ #if PPP_STATS_SUPPORT link_stats_valid = 0; #endif /* PPP_STATS_SUPPORT */ #if MPPE_SUPPORT pcb->mppe_keys_set = 0; memset(&pcb->mppe_comp, 0, sizeof(pcb->mppe_comp)); memset(&pcb->mppe_decomp, 0, sizeof(pcb->mppe_decomp)); #endif /* MPPE_SUPPORT */ #if VJ_SUPPORT vj_compress_init(&pcb->vj_comp); #endif /* VJ_SUPPORT */ /* Start protocol */ new_phase(pcb, PPP_PHASE_ESTABLISH); lcp_open(pcb); 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_link_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_link_end[%d]\n", pcb->netif->num)); new_phase(pcb, PPP_PHASE_DEAD); 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(pcb, "rcvd", (unsigned char *)pb->payload, pb->len); #endif /* PRINTPKT_SUPPORT */ pbuf_remove_header(pb, 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_remove_header(pb, 1); } else { protocol = (pl[0] << 8) | pl[1]; pbuf_remove_header(pb, 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 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 */ 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 = pbuf_coalesce(pb, PBUF_RAW); (*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 */ if (pbuf_add_header(pb, sizeof(protocol))) { PPPDEBUG(LOG_WARNING, ("ppp_input[%d]: Dropping (pbuf_add_header failed)\n", pcb->netif->num)); goto drop; } 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); } /* * 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). */ err_t ppp_write(ppp_pcb *pcb, struct pbuf *p) { #if PRINTPKT_SUPPORT ppp_dump_packet(pcb, "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_ANY4, IP4_ADDR_BROADCAST, IP4_ADDR_ANY4); 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_val(ns, ns1); dns_setserver(0, &ns); ip_addr_set_ip4_u32_val(ns, ns2); dns_setserver(1, &ns); return 1; } /******************************************************************** * * cdns - Clear the DNS servers */ int cdns(ppp_pcb *pcb, u32_t ns1, u32_t ns2) { const ip_addr_t *nsa; ip_addr_t nsb; LWIP_UNUSED_ARG(pcb); nsa = dns_getserver(0); ip_addr_set_ip4_u32_val(nsb, ns1); if (ip_addr_cmp(nsa, &nsb)) { dns_setserver(0, IP_ADDR_ANY); } nsa = dns_getserver(1); ip_addr_set_ip4_u32_val(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 = lwip_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) | lwip_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_state(pcb->netif, 0, IP6_ADDR_INVALID); netif_ip6_addr_set(pcb->netif, 0, IP6_ADDR_ANY6); 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; } const 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) { const 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 */