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lwip/src/netif/ppp/ppp.c

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/*****************************************************************************
* 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 <marc@mbsi.ca>
* Ported to lwIP.
* 97-11-05 Guy Lancaster <lancasterg@acm.org>, 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.
*/
#include "lwip/opt.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/sio.h"
#include "lwip/sys.h"
#include "lwip/ip.h" /* for ip_input() */
#include "ppp_impl.h"
#include "fsm.h"
#include "lcp.h"
#include "ipcp.h"
#include "magic.h"
#if PAP_SUPPORT
#include "upap.h"
#endif /* PAP_SUPPORT */
#if CHAP_SUPPORT
#include "chap-new.h"
#endif /* CHAP_SUPPORT */
#if EAP_SUPPORT
#include "eap.h"
#endif /* EAP_SUPPORT */
#if CCP_SUPPORT
#include "ccp.h"
#endif /* EAP_SUPPORT */
#if ECP_SUPPORT
#include "ecp.h"
#endif /* EAP_SUPPORT */
#if VJ_SUPPORT
#include "vj.h"
#endif /* VJ_SUPPORT */
#if PPPOE_SUPPORT
#include "netif/ppp_oe.h"
#endif /* PPPOE_SUPPORT */
/*************************/
/*** LOCAL DEFINITIONS ***/
/*************************/
/* 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.
*/
struct protent *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
&ipcp_protent,
#ifdef INET6
&ipv6cp_protent,
#endif
#if CCP_SUPPORT
&ccp_protent,
#endif /* CCP_SUPPORT */
#if ECP_SUPPORT
&ecp_protent,
#endif /* ECP_SUPPORT */
#ifdef AT_CHANGE
&atcp_protent,
#endif
#if EAP_SUPPORT
&eap_protent,
#endif /* EAP_SUPPORT */
NULL
};
#if PPPOS_SUPPORT
#define ESCAPE_P(accm, c) ((accm)[(c) >> 3] & ppp_accm_mask[c & 0x07])
#endif /* PPPOS_SUPPORT */
/* Prototypes for procedures local to this file. */
static void ppp_start(ppp_pcb *pcb); /** Initiate LCP open request */
#if PPPOS_SUPPORT
static void ppp_receive_wakeup(ppp_pcb *pcb);
#endif /* #if PPPOS_SUPPORT */
static void ppp_stop(ppp_pcb *pcb);
static void ppp_hup(ppp_pcb *pcb);
#if PPPOS_SUPPORT
#if PPP_INPROC_OWNTHREAD
static void ppp_input_thread(void *arg);
#endif /* PPP_INPROC_OWNTHREAD */
static void ppp_drop(ppp_pcb_rx *pcrx);
static void pppos_input_proc(ppp_pcb_rx *pcrx, u_char *s, int l);
static void pppos_input_callback(void *arg);
static void ppp_free_current_input_packet(ppp_pcb_rx *pcrx);
#endif /* PPPOS_SUPPORT */
static err_t ppp_netif_init_cb(struct netif *netif);
static err_t ppp_netif_output(struct netif *netif, struct pbuf *pb, ip_addr_t *ipaddr);
#if PPPOE_SUPPORT
static err_t ppp_netif_output_over_ethernet(ppp_pcb *pcb, struct pbuf *p);
/* function called by ppp_write() */
static int ppp_write_over_ethernet(ppp_pcb *pcb, const u_char *s, int n);
#endif /* PPPOE_SUPPORT */
static void ppp_destroy(ppp_pcb *pcb);
/***********************************/
/*** PUBLIC 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 session. */
ppp_pcb *ppp_new(u8_t num) {
int i;
ppp_pcb *pcb;
struct protent *protp;
pcb = (ppp_pcb*)memp_malloc(MEMP_PPP_PCB);
if (pcb == NULL)
return NULL;
#if PPP_STATS_SUPPORT
link_stats_valid = 0;
#endif /* PPP_STATS_SUPPORT */
memset(pcb, 0, sizeof(ppp_pcb));
pcb->num = num;
pcb->status = EXIT_OK;
pcb->lcp_loopbackfail = DEFLOOPBACKFAIL;
new_phase(pcb, PHASE_INITIALIZE);
/* default configuration */
pcb->settings.usepeerdns = 1;
pcb->settings.persist = 1;
#if CHAP_SUPPORT
pcb->settings.chap_timeout_time = 3;
pcb->settings.chap_max_transmits = 10;
#endif /* CHAP_SUPPPORT */
pcb->settings.lcp_echo_interval = LCP_ECHOINTERVAL;
pcb->settings.lcp_echo_fails = LCP_MAXECHOFAILS;
/*
* Initialize each protocol.
*/
for (i = 0; (protp = protocols[i]) != NULL; ++i)
(*protp->init)(pcb);
return pcb;
}
void ppp_set_auth(ppp_pcb *pcb, u8_t authtype, const char *user, const char *passwd) {
#if PAP_SUPPORT
if(authtype & PPPAUTHTYPE_PAP)
pcb->settings.refuse_pap = 0;
else
pcb->settings.refuse_pap = 1;
#endif /* PAP_SUPPORT */
#if CHAP_SUPPORT
if(authtype & PPPAUTHTYPE_CHAP)
pcb->settings.refuse_chap = 0;
else
pcb->settings.refuse_chap = 1;
#if MSCHAP_SUPPORT
if(authtype & PPPAUTHTYPE_MSCHAP) {
pcb->settings.refuse_mschap = 0;
pcb->settings.refuse_mschap_v2 = 0;
} else {
pcb->settings.refuse_mschap = 1;
pcb->settings.refuse_mschap_v2 = 1;
}
#endif /* MSCHAP_SUPPORT */
#endif /* CHAP_SUPPORT */
#if EAP_SUPPORT
if(authtype & PPPAUTHTYPE_EAP)
pcb->settings.refuse_eap = 0;
else
pcb->settings.refuse_eap = 1;
#endif /* EAP_SUPPORT */
if(user) {
strncpy(pcb->settings.user, user, sizeof(pcb->settings.user)-1);
pcb->settings.user[sizeof(pcb->settings.user)-1] = '\0';
} else
pcb->settings.user[0] = '\0';
if(passwd) {
strncpy(pcb->settings.passwd, passwd, sizeof(pcb->settings.passwd)-1);
pcb->settings.passwd[sizeof(pcb->settings.passwd)-1] = '\0';
} else
pcb->settings.passwd[0] = '\0';
}
#if PPPOS_SUPPORT
/** Open a new PPP connection using the given I/O device.
* This initializes the PPP control block but does not
* attempt to negotiate the LCP session. If this port
* connects to a modem, the modem connection must be
* established before calling this.
* Return a new PPP connection descriptor on success or
* an error code (negative) on failure.
*
* pppOpen() is directly defined to this function.
*/
int ppp_over_serial_open(ppp_pcb *pcb, sio_fd_t fd, ppp_link_status_cb_fn link_status_cb, void *link_status_ctx) {
/* PPP is single-threaded: without a callback,
* there is no way to know when the link is up. */
if (link_status_cb == NULL)
return PPPERR_PARAM;
/* input pbuf left over from last session? */
ppp_free_current_input_packet(&pcb->rx);
pcb->fd = fd;
pcb->rx.pcb = pcb;
pcb->rx.fd = fd;
#if VJ_SUPPORT
vj_compress_init(&pcb->vj_comp);
#endif /* VJ_SUPPORT */
/*
* Default the in and out accm so that escape and flag characters
* are always escaped.
*/
pcb->rx.in_accm[15] = 0x60; /* no need to protect since RX is not running */
pcb->out_accm[15] = 0x60;
pcb->link_status_cb = link_status_cb;
pcb->link_status_ctx = link_status_ctx;
/*
* Start the connection and handle incoming events (packet or timeout).
*/
PPPDEBUG(LOG_INFO, ("ppp_over_serial_open: unit %d: Connecting\n", pcb->num));
ppp_start(pcb);
#if PPP_INPROC_OWNTHREAD
sys_thread_new(PPP_THREAD_NAME, ppp_input_thread, (void*)&pcb->rx, PPP_THREAD_STACKSIZE, PPP_THREAD_PRIO);
#endif /* PPP_INPROC_OWNTHREAD */
return PPPERR_NONE;
}
/*
* ppp_set_xaccm - set the extended transmit ACCM for the interface.
*/
void ppp_set_xaccm(ppp_pcb *pcb, ext_accm *accm) {
SMEMCPY(pcb->out_accm, accm, sizeof(ext_accm));
PPPDEBUG(LOG_INFO, ("ppp_set_xaccm[%d]: out_accm=%X %X %X %X\n",
pcb->num,
pcb->out_accm[0],
pcb->out_accm[1],
pcb->out_accm[2],
pcb->out_accm[3]));
}
#endif /* PPPOS_SUPPORT */
#if PPPOE_SUPPORT
static void ppp_over_ethernet_link_status_cb(ppp_pcb *pcb, int state);
int ppp_over_ethernet_open(ppp_pcb *pcb, struct netif *ethif, const char *service_name, const char *concentrator_name,
ppp_link_status_cb_fn link_status_cb, void *link_status_ctx) {
lcp_options *wo = &pcb->lcp_wantoptions;
lcp_options *ao = &pcb->lcp_allowoptions;
LWIP_UNUSED_ARG(service_name);
LWIP_UNUSED_ARG(concentrator_name);
/* PPP is single-threaded: without a callback,
* there is no way to know when the link is up. */
if (link_status_cb == NULL)
return PPPERR_PARAM;
pcb->ethif = ethif;
pcb->link_status_cb = link_status_cb;
pcb->link_status_ctx = link_status_ctx;
wo->mru = ethif->mtu-PPPOE_HEADERLEN-2; /* two byte PPP protocol discriminator, then IP data */
wo->neg_asyncmap = 0;
wo->neg_pcompression = 0;
wo->neg_accompression = 0;
ao->mru = ethif->mtu-PPPOE_HEADERLEN-2; /* two byte PPP protocol discriminator, then IP data */
ao->neg_asyncmap = 0;
ao->neg_pcompression = 0;
ao->neg_accompression = 0;
if(pppoe_create(ethif, pcb, ppp_over_ethernet_link_status_cb, &pcb->pppoe_sc) != ERR_OK) {
return PPPERR_OPEN;
}
pppoe_connect(pcb->pppoe_sc);
return PPPERR_NONE;
}
#endif /* PPPOE_SUPPORT */
/* Close a PPP connection and release the descriptor.
* Any outstanding packets in the queues are dropped.
* Return 0 on success, an error code on failure. */
int
ppp_close(ppp_pcb *pcb)
{
int st = 0;
PPPDEBUG(LOG_DEBUG, ("ppp_close() called\n"));
pcb->settings.persist = 0;
/* Disconnect */
#if PPPOE_SUPPORT
if(pcb->ethif) {
PPPDEBUG(LOG_DEBUG, ("ppp_close: unit %d kill_link -> ppp_stop\n", pcb->num));
pcb->err_code = PPPERR_USER;
/* This will leave us at PHASE_DEAD. */
ppp_stop(pcb);
} else
#endif /* PPPOE_SUPPORT */
{
#if PPPOS_SUPPORT
PPPDEBUG(LOG_DEBUG, ("ppp_close: unit %d kill_link -> ppp_stop\n", pcb->num));
pcb->err_code = PPPERR_USER;
/* This will leave us at PHASE_DEAD. */
ppp_stop(pcb);
#if PPP_INPROC_OWNTHREAD
ppp_receive_wakeup(pcb);
#endif /* PPP_INPROC_OWNTHREAD */
#endif /* PPPOS_SUPPORT */
}
return st;
}
/* This function is called when carrier is lost on the PPP channel. */
void
ppp_sighup(ppp_pcb *pcb)
{
PPPDEBUG(LOG_DEBUG, ("ppp_sighup: unit %d sig_hup -> ppp_hup\n", pcb->num));
ppp_hup(pcb);
}
/** Initiate LCP open request */
static void ppp_start(ppp_pcb *pcb) {
PPPDEBUG(LOG_DEBUG, ("ppp_start: unit %d\n", pcb->num));
lcp_open(pcb); /* Start protocol */
lcp_lowerup(pcb);
PPPDEBUG(LOG_DEBUG, ("ppp_start: finished\n"));
}
/** LCP close request */
static void ppp_stop(ppp_pcb *pcb) {
PPPDEBUG(LOG_DEBUG, ("ppp_stop: unit %d\n", pcb->num));
lcp_close(pcb, "User request");
}
/** Called when carrier/link is lost */
static void ppp_hup(ppp_pcb *pcb) {
PPPDEBUG(LOG_DEBUG, ("ppp_hup: unit %d\n", pcb->num));
lcp_lowerdown(pcb);
link_terminated(pcb);
}
/*
* 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;
protocol = (((u8_t *)pb->payload)[0] << 8) | ((u8_t*)pb->payload)[1];
#if PRINTPKT_SUPPORT
dump_packet("rcvd", pb->payload, pb->len);
#endif /* PRINTPKT_SUPPORT */
if(pbuf_header(pb, -(int)sizeof(protocol))) {
LWIP_ASSERT("pbuf_header failed\n", 0);
goto drop;
}
LINK_STATS_INC(link.recv);
snmp_inc_ifinucastpkts(&pcb->netif);
snmp_add_ifinoctets(&pcb->netif, pb->tot_len);
/*
* Toss all non-LCP packets unless LCP is OPEN.
*/
if (protocol != PPP_LCP && pcb->lcp_fsm.state != OPENED) {
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 <= 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 */
)) {
dbglog("discarding proto 0x%x in phase %d",
protocol, pcb->phase);
goto drop;
}
/* FIXME: should we write protent to do that ? */
switch(protocol) {
#if PPPOS_SUPPORT && VJ_SUPPORT
case PPP_VJC_COMP: /* VJ compressed TCP */
PPPDEBUG(LOG_INFO, ("ppp_input[%d]: vj_comp in pbuf len=%d\n", pcb->num, pb->len));
/*
* Clip off the VJ header and prepend the rebuilt TCP/IP header and
* pass the result to IP.
*/
if ((vj_uncompress_tcp(&pb, &pcb->vj_comp) >= 0) && (pcb->netif.input)) {
pcb->netif.input(pb, &pcb->netif);
return;
}
/* Something's wrong so drop it. */
PPPDEBUG(LOG_WARNING, ("ppp_input[%d]: Dropping VJ compressed\n", pcb->num));
break;
case PPP_VJC_UNCOMP: /* VJ uncompressed TCP */
PPPDEBUG(LOG_INFO, ("ppp_input[%d]: vj_un in pbuf len=%d\n", pcb->num, pb->len));
/*
* Process the TCP/IP header for VJ header compression and then pass
* the packet to IP.
*/
if ((vj_uncompress_uncomp(pb, &pcb->vj_comp) >= 0) && pcb->netif.input) {
pcb->netif.input(pb, &pcb->netif);
return;
}
/* Something's wrong so drop it. */
PPPDEBUG(LOG_WARNING, ("ppp_input[%d]: Dropping VJ uncompressed\n", pcb->num));
break;
#endif /* PPPOS_SUPPORT && VJ_SUPPORT */
case PPP_IP: /* Internet Protocol */
PPPDEBUG(LOG_INFO, ("ppp_input[%d]: ip in pbuf len=%d\n", pcb->num, pb->len));
if (pcb->netif.input) {
pcb->netif.input(pb, &pcb->netif);
return;
}
break;
default: {
int i;
struct protent *protp;
/*
* Upcall the proper protocol input routine.
*/
for (i = 0; (protp = protocols[i]) != NULL; ++i) {
if (protp->protocol == protocol && protp->enabled_flag) {
pb = ppp_singlebuf(pb);
(*protp->input)(pcb, pb->payload, pb->len);
goto out;
}
#if 0 /* UNUSED
*
* This is actually a (hacked?) way for the PPP kernel implementation to pass a
* data packet to the PPP daemon. The PPP daemon normally only do signaling
* (LCP, PAP, CHAP, IPCP, ...) and does not handle any data packet at all.
*
* This is only used by CCP, which we cannot support until we have a CCP data
* implementation.
*/
if (protocol == (protp->protocol & ~0x8000) && protp->enabled_flag
&& protp->datainput != NULL) {
(*protp->datainput)(pcb, pb->payload, pb->len);
goto out;
}
#endif /* UNUSED */
}
#if PPP_DEBUG
#if PPP_PROTOCOLNAME
const char *pname = protocol_name(protocol);
if (pname != NULL)
warn("Unsupported protocol '%s' (0x%x) received", pname, protocol);
else
#endif /* PPP_PROTOCOLNAME */
warn("Unsupported protocol 0x%x received", protocol);
#endif /* PPP_DEBUG */
if (pbuf_header(pb, sizeof(protocol))) {
LWIP_ASSERT("pbuf_header failed\n", 0);
goto drop;
}
lcp_sprotrej(pcb, pb->payload, pb->len);
}
break;
}
drop:
LINK_STATS_INC(link.drop);
snmp_inc_ifindiscards(&pcb->netif);
out:
pbuf_free(pb);
return;
#if 0
/*
* Toss all non-LCP packets unless LCP is OPEN.
* Until we get past the authentication phase, toss all packets
* except LCP, LQR and authentication packets.
*/
if((lcp_phase[pcb->unit] <= PHASE_AUTHENTICATE) && (protocol != PPP_LCP)) {
if(!((protocol == PPP_LQR) || (protocol == PPP_PAP) || (protocol == PPP_CHAP)) ||
(lcp_phase[pcb->unit] != PHASE_AUTHENTICATE)) {
PPPDEBUG(LOG_INFO, ("ppp_input: discarding proto 0x%"X16_F" in phase %d\n", protocol, lcp_phase[pcb->unit]));
goto drop;
}
}
switch(protocol) {
case PPP_VJC_COMP: /* VJ compressed TCP */
#if PPPOS_SUPPORT && VJ_SUPPORT
PPPDEBUG(LOG_INFO, ("ppp_input[%d]: vj_comp in pbuf len=%d\n", pcb->unit, pb->len));
/*
* Clip off the VJ header and prepend the rebuilt TCP/IP header and
* pass the result to IP.
*/
if ((vj_uncompress_tcp(&pb, pcb->vj_comp) >= 0) && (pcb->netif.input)) {
pcb->netif.input(pb, pcb->netif);
return;
}
/* Something's wrong so drop it. */
PPPDEBUG(LOG_WARNING, ("ppp_input[%d]: Dropping VJ compressed\n", pcb->unit));
#else /* PPPOS_SUPPORT && VJ_SUPPORT */
/* No handler for this protocol so drop the packet. */
PPPDEBUG(LOG_INFO, ("ppp_input[%d]: drop VJ Comp in %d:%s\n", pcb->unit, pb->len, pb->payload));
#endif /* PPPOS_SUPPORT && VJ_SUPPORT */
break;
case PPP_VJC_UNCOMP: /* VJ uncompressed TCP */
#if PPPOS_SUPPORT && VJ_SUPPORT
PPPDEBUG(LOG_INFO, ("ppp_input[%d]: vj_un in pbuf len=%d\n", pcb->unit, pb->len));
/*
* Process the TCP/IP header for VJ header compression and then pass
* the packet to IP.
*/
if ((vj_uncompress_uncomp(pb, pcb->vj_comp) >= 0) && pcb->netif.input) {
pcb->netif.input(pb, pcb->netif);
return;
}
/* Something's wrong so drop it. */
PPPDEBUG(LOG_WARNING, ("ppp_input[%d]: Dropping VJ uncompressed\n", pcb->unit));
#else /* PPPOS_SUPPORT && VJ_SUPPORT */
/* No handler for this protocol so drop the packet. */
PPPDEBUG(LOG_INFO,
("ppp_input[%d]: drop VJ UnComp in %d:.*H\n",
pcb->unit, pb->len, LWIP_MIN(pb->len * 2, 40), pb->payload));
#endif /* PPPOS_SUPPORT && VJ_SUPPORT */
break;
case PPP_IP: /* Internet Protocol */
PPPDEBUG(LOG_INFO, ("ppp_input[%d]: ip in pbuf len=%d\n", pcb->unit, pb->len));
if (pcb->netif.input) {
pcb->netif.input(pb, pcb->netif);
return;
}
break;
default: {
struct protent *protp;
int i;
/*
* Upcall the proper protocol input routine.
*/
for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
if (protp->protocol == protocol && protp->enabled_flag) {
PPPDEBUG(LOG_INFO, ("ppp_input[%d]: %s len=%d\n", pcb->unit, protp->name, pb->len));
pb = ppp_singlebuf(pb);
(*protp->input)(pcb->unit, pb->payload, pb->len);
PPPDEBUG(LOG_DETAIL, ("ppp_input[%d]: packet processed\n", pcb->unit));
goto out;
}
}
/* No handler for this protocol so reject the packet. */
PPPDEBUG(LOG_INFO, ("ppp_input[%d]: rejecting unsupported proto 0x%"X16_F" len=%d\n", pcb->unit, protocol, pb->len));
if (pbuf_header(pb, sizeof(protocol))) {
LWIP_ASSERT("pbuf_header failed\n", 0);
goto drop;
}
#if BYTE_ORDER == LITTLE_ENDIAN
protocol = htons(protocol);
#endif /* BYTE_ORDER == LITTLE_ENDIAN */
SMEMCPY(pb->payload, &protocol, sizeof(protocol));
lcp_sprotrej(pcb->unit, pb->payload, pb->len);
}
break;
}
#endif
}
#if PPPOS_SUPPORT
/*
* FCS lookup table as calculated by genfcstab.
* @todo: smaller, slower implementation for lower memory footprint?
*/
static const u_short fcstab[256] = {
0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};
/* PPP's Asynchronous-Control-Character-Map. The mask array is used
* to select the specific bit for a character. */
static u_char ppp_accm_mask[] = {
0x01,
0x02,
0x04,
0x08,
0x10,
0x20,
0x40,
0x80
};
#if PPP_INPROC_OWNTHREAD
/** Wake up the task blocked in reading from serial line (if any) */
static void
ppp_receive_wakeup(ppp_pcb *pcb)
{
PPPDEBUG(LOG_DEBUG, ("ppp_receive_wakeup: unit %d\n", pcb->num));
sio_read_abort(pcb->fd);
}
#endif /* PPP_INPROC_OWNTHREAD */
#endif /* PPPOS_SUPPORT */
/*
* 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';
netif->output = ppp_netif_output;
netif->mtu = netif_get_mtu((ppp_pcb*)netif->state);
netif->flags = NETIF_FLAG_POINTTOPOINT | NETIF_FLAG_LINK_UP;
#if LWIP_NETIF_HOSTNAME
/* @todo: Initialize interface hostname */
/* netif_set_hostname(netif, "lwip"); */
#endif /* LWIP_NETIF_HOSTNAME */
return ERR_OK;
}
/**********************************/
/*** LOCAL FUNCTION DEFINITIONS ***/
/**********************************/
#if PPPOS_SUPPORT && PPP_INPROC_OWNTHREAD
/* The main PPP process function. This implements the state machine according
* to section 4 of RFC 1661: The Point-To-Point Protocol. */
static void
ppp_input_thread(void *arg)
{
int count;
ppp_pcb_rx *pcrx = arg;
ppp_pcb *pcb = (ppp_pcb*)pcrx->pcb;
while (pcb->phase != PHASE_DEAD) {
count = sio_read(pcrx->fd, pcrx->rxbuf, PPPOS_RX_BUFSIZE);
if(count > 0) {
pppos_input_proc(pcrx, pcrx->rxbuf, count);
} else {
/* nothing received, give other tasks a chance to run */
sys_msleep(1);
}
}
}
#endif /* PPPOS_SUPPORT && PPP_INPROC_OWNTHREAD */
#if PPPOS_SUPPORT
static void
pppos_put(ppp_pcb *pcb, struct pbuf *nb)
{
struct pbuf *b;
int c;
for(b = nb; b != NULL; b = b->next) {
if((c = sio_write(pcb->fd, b->payload, b->len)) != b->len) {
PPPDEBUG(LOG_WARNING,
("PPP pppos_put: incomplete sio_write(fd:%"SZT_F", len:%d, c: 0x%"X8_F") c = %d\n", (size_t)pcb->fd, b->len, c, c));
LINK_STATS_INC(link.err);
pcb->last_xmit = 0; /* prepend PPP_FLAG to next packet */
snmp_inc_ifoutdiscards(&pcb->netif);
pbuf_free(nb);
return;
}
}
snmp_add_ifoutoctets(&pcb->netif, nb->tot_len);
snmp_inc_ifoutucastpkts(&pcb->netif);
pbuf_free(nb);
LINK_STATS_INC(link.xmit);
}
/*
* ppp_append - append given character to end of given pbuf. If out_accm
* is not NULL and the character needs to be escaped, do so.
* If pbuf is full, append another.
* Return the current pbuf.
*/
static struct pbuf *
ppp_append(u_char c, struct pbuf *nb, ext_accm *out_accm)
{
struct pbuf *tb = nb;
/* Make sure there is room for the character and an escape code.
* Sure we don't quite fill the buffer if the character doesn't
* get escaped but is one character worth complicating this? */
/* Note: We assume no packet header. */
if (nb && (PBUF_POOL_BUFSIZE - nb->len) < 2) {
tb = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
if (tb) {
nb->next = tb;
} else {
LINK_STATS_INC(link.memerr);
}
nb = tb;
}
if (nb) {
if (out_accm && ESCAPE_P(*out_accm, c)) {
*((u_char*)nb->payload + nb->len++) = PPP_ESCAPE;
*((u_char*)nb->payload + nb->len++) = c ^ PPP_TRANS;
} else {
*((u_char*)nb->payload + nb->len++) = c;
}
}
return tb;
}
#endif /* PPPOS_SUPPORT */
/* Send a packet on the given connection.
*
* This is the low level function that send the PPP packet.
*/
static err_t ppp_netif_output(struct netif *netif, struct pbuf *pb, ip_addr_t *ipaddr) {
ppp_pcb *pcb = (ppp_pcb*)netif->state;
#if PPPOS_SUPPORT
u_short protocol = PPP_IP;
u_int fcs_out = PPP_INITFCS;
struct pbuf *head = NULL, *tail = NULL, *p;
u_char c;
#endif /* PPPOS_SUPPORT */
LWIP_UNUSED_ARG(ipaddr);
/* Validate parameters. */
/* We let any protocol value go through - it can't hurt us
* and the peer will just drop it if it's not accepting it. */
if (!pcb || !pb) {
PPPDEBUG(LOG_WARNING, ("ppp_netif_output[%d]: bad params prot=%d pb=%p\n",
pcb->num, PPP_IP, (void*)pb));
LINK_STATS_INC(link.opterr);
LINK_STATS_INC(link.drop);
snmp_inc_ifoutdiscards(netif);
return ERR_ARG;
}
/* Check that the link is up. */
if (pcb->phase == PHASE_DEAD) {
PPPDEBUG(LOG_ERR, ("ppp_netif_output[%d]: link not up\n", pcb->num));
LINK_STATS_INC(link.rterr);
LINK_STATS_INC(link.drop);
snmp_inc_ifoutdiscards(netif);
return ERR_RTE;
}
#if PPPOE_SUPPORT
if(pcb->ethif) {
return ppp_netif_output_over_ethernet(pcb, pb);
}
#endif /* PPPOE_SUPPORT */
#if PPPOS_SUPPORT
/* Grab an output buffer. */
head = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
if (head == NULL) {
PPPDEBUG(LOG_WARNING, ("ppp_netif_output[%d]: first alloc fail\n", pcb->num));
LINK_STATS_INC(link.memerr);
LINK_STATS_INC(link.drop);
snmp_inc_ifoutdiscards(netif);
return ERR_MEM;
}
#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_PROTOCOL; */
break;
case TYPE_COMPRESSED_TCP:
protocol = PPP_VJC_COMP;
break;
case TYPE_UNCOMPRESSED_TCP:
protocol = PPP_VJC_UNCOMP;
break;
default:
PPPDEBUG(LOG_WARNING, ("ppp_netif_output[%d]: bad IP packet\n", pcb->num));
LINK_STATS_INC(link.proterr);
LINK_STATS_INC(link.drop);
snmp_inc_ifoutdiscards(netif);
pbuf_free(head);
return ERR_VAL;
}
}
#endif /* VJ_SUPPORT */
tail = head;
/* Build the PPP header. */
if ((sys_jiffies() - pcb->last_xmit) >= PPP_MAXIDLEFLAG) {
tail = ppp_append(PPP_FLAG, tail, NULL);
}
pcb->last_xmit = sys_jiffies();
if (!pcb->accomp) {
fcs_out = PPP_FCS(fcs_out, PPP_ALLSTATIONS);
tail = ppp_append(PPP_ALLSTATIONS, tail, &pcb->out_accm);
fcs_out = PPP_FCS(fcs_out, PPP_UI);
tail = ppp_append(PPP_UI, tail, &pcb->out_accm);
}
if (!pcb->pcomp || protocol > 0xFF) {
c = (protocol >> 8) & 0xFF;
fcs_out = PPP_FCS(fcs_out, c);
tail = ppp_append(c, tail, &pcb->out_accm);
}
c = protocol & 0xFF;
fcs_out = PPP_FCS(fcs_out, c);
tail = ppp_append(c, tail, &pcb->out_accm);
/* Load packet. */
for(p = pb; p; p = p->next) {
int n;
u_char *sPtr;
sPtr = (u_char*)p->payload;
n = p->len;
while (n-- > 0) {
c = *sPtr++;
/* Update FCS before checking for special characters. */
fcs_out = PPP_FCS(fcs_out, c);
/* Copy to output buffer escaping special characters. */
tail = ppp_append(c, tail, &pcb->out_accm);
}
}
/* Add FCS and trailing flag. */
c = ~fcs_out & 0xFF;
tail = ppp_append(c, tail, &pcb->out_accm);
c = (~fcs_out >> 8) & 0xFF;
tail = ppp_append(c, tail, &pcb->out_accm);
tail = ppp_append(PPP_FLAG, tail, NULL);
/* If we failed to complete the packet, throw it away. */
if (!tail) {
PPPDEBUG(LOG_WARNING,
("ppp_netif_output[%d]: Alloc err - dropping proto=%d\n",
pcb->num, protocol));
pbuf_free(head);
LINK_STATS_INC(link.memerr);
LINK_STATS_INC(link.drop);
snmp_inc_ifoutdiscards(netif);
return ERR_MEM;
}
/* Send it. */
PPPDEBUG(LOG_INFO, ("ppp_netif_output[%d]: proto=0x%"X16_F"\n", pcb->num, protocol));
pppos_put(pcb, head);
#endif /* PPPOS_SUPPORT */
return ERR_OK;
}
#if PPPOE_SUPPORT
static err_t ppp_netif_output_over_ethernet(ppp_pcb *pcb, struct pbuf *p) {
struct pbuf *pb;
u_short protocol = PPP_IP;
int i=0;
u16_t tot_len;
/* @todo: try to use pbuf_header() here! */
pb = pbuf_alloc(PBUF_LINK, PPPOE_HDRLEN + sizeof(protocol), PBUF_RAM);
if(!pb) {
LINK_STATS_INC(link.memerr);
LINK_STATS_INC(link.proterr);
snmp_inc_ifoutdiscards(&pcb->netif);
return ERR_MEM;
}
pbuf_header(pb, -(s16_t)PPPOE_HDRLEN);
pcb->last_xmit = sys_jiffies();
if (!pcb->pcomp || protocol > 0xFF) {
*((u_char*)pb->payload + i++) = (protocol >> 8) & 0xFF;
}
*((u_char*)pb->payload + i) = protocol & 0xFF;
pbuf_chain(pb, p);
tot_len = pb->tot_len;
if(pppoe_xmit(pcb->pppoe_sc, pb) != ERR_OK) {
LINK_STATS_INC(link.err);
snmp_inc_ifoutdiscards(&pcb->netif);
return PPPERR_DEVICE;
}
snmp_add_ifoutoctets(&pcb->netif, tot_len);
snmp_inc_ifoutucastpkts(&pcb->netif);
LINK_STATS_INC(link.xmit);
return ERR_OK;
}
#endif /* PPPOE_SUPPORT */
/* Get and set parameters for the given connection.
* Return 0 on success, an error code on failure. */
int
ppp_ioctl(ppp_pcb *pcb, int cmd, void *arg)
{
if(NULL == pcb)
return PPPERR_PARAM;
switch(cmd) {
case PPPCTLG_UPSTATUS: /* Get the PPP up status. */
if (arg) {
*(int *)arg = (int)(pcb->if_up);
return PPPERR_NONE;
}
return PPPERR_PARAM;
break;
case PPPCTLS_ERRCODE: /* Set the PPP error code. */
if (arg) {
pcb->err_code = *(int *)arg;
return PPPERR_NONE;
}
return PPPERR_PARAM;
break;
case PPPCTLG_ERRCODE: /* Get the PPP error code. */
if (arg) {
*(int *)arg = (int)(pcb->err_code);
return PPPERR_NONE;
}
return PPPERR_PARAM;
break;
#if PPPOS_SUPPORT
case PPPCTLG_FD: /* Get the fd associated with the ppp */
if (arg) {
*(sio_fd_t *)arg = pcb->fd;
return PPPERR_NONE;
}
return PPPERR_PARAM;
break;
#endif /* PPPOS_SUPPORT */
default:
return PPPERR_PARAM;
break;
}
return PPPERR_PARAM;
}
/* FIXME: improve that */
int ppp_write_pbuf(ppp_pcb *pcb, struct pbuf *p) {
ppp_write(pcb, p->payload, p->len);
pbuf_free(p);
}
/*
* Write n characters to a ppp link.
* RETURN: >= 0 Number of characters written
* -1 Failed to write to device
*/
int ppp_write(ppp_pcb *pcb, const u_char *s, int n) {
#if PPPOS_SUPPORT
u_char c;
u_int fcs_out;
struct pbuf *head, *tail;
#endif /* PPPOS_SUPPORT */
#if PPPOE_SUPPORT
if(pcb->ethif) {
return ppp_write_over_ethernet(pcb, s, n);
}
#endif /* PPPOE_SUPPORT */
#if PPPOS_SUPPORT
head = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
if (head == NULL) {
LINK_STATS_INC(link.memerr);
LINK_STATS_INC(link.proterr);
snmp_inc_ifoutdiscards(&pcb->netif);
return PPPERR_ALLOC;
}
tail = head;
/* If the link has been idle, we'll send a fresh flag character to
* flush any noise. */
if ((sys_jiffies() - pcb->last_xmit) >= PPP_MAXIDLEFLAG) {
tail = ppp_append(PPP_FLAG, tail, NULL);
}
pcb->last_xmit = sys_jiffies();
fcs_out = PPP_INITFCS;
/* Load output buffer. */
while (n-- > 0) {
c = *s++;
/* Update FCS before checking for special characters. */
fcs_out = PPP_FCS(fcs_out, c);
/* Copy to output buffer escaping special characters. */
tail = ppp_append(c, tail, &pcb->out_accm);
}
/* Add FCS and trailing flag. */
c = ~fcs_out & 0xFF;
tail = ppp_append(c, tail, &pcb->out_accm);
c = (~fcs_out >> 8) & 0xFF;
tail = ppp_append(c, tail, &pcb->out_accm);
tail = ppp_append(PPP_FLAG, tail, NULL);
/* If we failed to complete the packet, throw it away.
* Otherwise send it. */
if (!tail) {
PPPDEBUG(LOG_WARNING,
("ppp_write[%d]: Alloc err - dropping pbuf len=%d\n", pcb->num, head->len));
/*"ppp_write[%d]: Alloc err - dropping %d:%.*H", pd, head->len, LWIP_MIN(head->len * 2, 40), head->payload)); */
pbuf_free(head);
LINK_STATS_INC(link.memerr);
LINK_STATS_INC(link.proterr);
snmp_inc_ifoutdiscards(&pcb->netif);
return PPPERR_ALLOC;
}
PPPDEBUG(LOG_INFO, ("ppp_write[%d]: len=%d\n", pcb->num, head->len));
/* "ppp_write[%d]: %d:%.*H", pd, head->len, LWIP_MIN(head->len * 2, 40), head->payload)); */
pppos_put(pcb, head);
#endif /* PPPOS_SUPPORT */
return PPPERR_NONE;
}
#if PPPOE_SUPPORT
static int ppp_write_over_ethernet(ppp_pcb *pcb, const u_char *s, int n) {
struct pbuf *pb;
/* skip address & flags */
s += 2;
n -= 2;
LWIP_ASSERT("PPPOE_HDRLEN + n <= 0xffff", PPPOE_HDRLEN + n <= 0xffff);
pb = pbuf_alloc(PBUF_LINK, (u16_t)(PPPOE_HDRLEN + n), PBUF_RAM);
if(!pb) {
LINK_STATS_INC(link.memerr);
LINK_STATS_INC(link.proterr);
snmp_inc_ifoutdiscards(&pcb->netif);
return PPPERR_ALLOC;
}
pbuf_header(pb, -(s16_t)PPPOE_HDRLEN);
pcb->last_xmit = sys_jiffies();
MEMCPY(pb->payload, s, n);
if(pppoe_xmit(pcb->pppoe_sc, pb) != ERR_OK) {
LINK_STATS_INC(link.err);
snmp_inc_ifoutdiscards(&pcb->netif);
return PPPERR_DEVICE;
}
#if PRINTPKT_SUPPORT
dump_packet("sent", (unsigned char *)s, n);
#endif /* PRINTPKT_SUPPORT */
snmp_add_ifoutoctets(&pcb->netif, (u16_t)n);
snmp_inc_ifoutucastpkts(&pcb->netif);
LINK_STATS_INC(link.xmit);
return PPPERR_NONE;
}
#endif /* PPPOE_SUPPORT */
#if PPPOS_SUPPORT
/*
* Drop the input packet.
*/
static void
ppp_free_current_input_packet(ppp_pcb_rx *pcrx)
{
if (pcrx->in_head != NULL) {
if (pcrx->in_tail && (pcrx->in_tail != pcrx->in_head)) {
pbuf_free(pcrx->in_tail);
}
pbuf_free(pcrx->in_head);
pcrx->in_head = NULL;
}
pcrx->in_tail = NULL;
}
/*
* Drop the input packet and increase error counters.
*/
static void
ppp_drop(ppp_pcb_rx *pcrx)
{
ppp_pcb *pcb = (ppp_pcb*)pcrx->pcb;
if (pcrx->in_head != NULL) {
#if 0
PPPDEBUG(LOG_INFO, ("ppp_drop: %d:%.*H\n", pcrx->in_head->len, min(60, pcrx->in_head->len * 2), pcrx->in_head->payload));
#endif
PPPDEBUG(LOG_INFO, ("ppp_drop: pbuf len=%d, addr %p\n", pcrx->in_head->len, (void*)pcrx->in_head));
}
ppp_free_current_input_packet(pcrx);
#if VJ_SUPPORT
vj_uncompress_err(&pcb->vj_comp);
#endif /* VJ_SUPPORT */
LINK_STATS_INC(link.drop);
snmp_inc_ifindiscards(&pcb->netif);
}
#if !PPP_INPROC_OWNTHREAD
/** Pass received raw characters to PPPoS to be decoded. This function is
* thread-safe and can be called from a dedicated RX-thread or from a main-loop.
*
* @param pd PPP descriptor index, returned by pppOpen()
* @param data received data
* @param len length of received data
*/
void
pppos_input(ppp_pcb *pcb, u_char* data, int len)
{
pppos_input_proc(pcb->rx, data, len);
}
#endif
/**
* Process a received octet string.
*/
static void
pppos_input_proc(ppp_pcb_rx *pcrx, u_char *s, int l)
{
ppp_pcb *pcb = (ppp_pcb*)pcrx->pcb;
struct pbuf *next_pbuf;
u_char cur_char;
u_char escaped;
SYS_ARCH_DECL_PROTECT(lev);
PPPDEBUG(LOG_DEBUG, ("pppos_input_proc[%d]: got %d bytes\n", pcb->num, l));
while (l-- > 0) {
cur_char = *s++;
SYS_ARCH_PROTECT(lev);
escaped = ESCAPE_P(pcrx->in_accm, cur_char);
SYS_ARCH_UNPROTECT(lev);
/* Handle special characters. */
if (escaped) {
/* Check for escape sequences. */
/* XXX Note that this does not handle an escaped 0x5d character which
* would appear as an escape character. Since this is an ASCII ']'
* and there is no reason that I know of to escape it, I won't complicate
* the code to handle this case. GLL */
if (cur_char == PPP_ESCAPE) {
pcrx->in_escaped = 1;
/* Check for the flag character. */
} else if (cur_char == PPP_FLAG) {
/* If this is just an extra flag character, ignore it. */
if (pcrx->in_state <= PDADDRESS) {
/* ignore it */;
/* If we haven't received the packet header, drop what has come in. */
} else if (pcrx->in_state < PDDATA) {
PPPDEBUG(LOG_WARNING,
("pppos_input_proc[%d]: Dropping incomplete packet %d\n",
pcb->num, pcrx->in_state));
LINK_STATS_INC(link.lenerr);
ppp_drop(pcrx);
/* If the fcs is invalid, drop the packet. */
} else if (pcrx->in_fcs != PPP_GOODFCS) {
PPPDEBUG(LOG_INFO,
("pppos_input_proc[%d]: Dropping bad fcs 0x%"X16_F" proto=0x%"X16_F"\n",
pcb->num, pcrx->in_fcs, pcrx->in_protocol));
/* Note: If you get lots of these, check for UART frame errors or try different baud rate */
LINK_STATS_INC(link.chkerr);
ppp_drop(pcrx);
/* Otherwise it's a good packet so pass it on. */
} else {
struct pbuf *inp;
#if PPP_INPROC_MULTITHREADED
struct pbuf *head;
#endif /* PPP_INPROC_MULTITHREADED */
/* Trim off the checksum. */
if(pcrx->in_tail->len > 2) {
pcrx->in_tail->len -= 2;
pcrx->in_tail->tot_len = pcrx->in_tail->len;
if (pcrx->in_tail != pcrx->in_head) {
pbuf_cat(pcrx->in_head, pcrx->in_tail);
}
} else {
pcrx->in_tail->tot_len = pcrx->in_tail->len;
if (pcrx->in_tail != pcrx->in_head) {
pbuf_cat(pcrx->in_head, pcrx->in_tail);
}
pbuf_realloc(pcrx->in_head, pcrx->in_head->tot_len - 2);
}
/* Dispatch the packet thereby consuming it. */
inp = pcrx->in_head;
/* Packet consumed, release our references. */
pcrx->in_head = NULL;
pcrx->in_tail = NULL;
#if PPP_INPROC_MULTITHREADED
head = pbuf_alloc(PBUF_RAW, sizeof(void*), PBUF_POOL);
if(NULL != head) {
MEMCPY(head->payload, pcb, sizeof(void*));
pbuf_chain(head, inp);
if(tcpip_callback_with_block(pppos_input_callback, head, 0) != ERR_OK) {
PPPDEBUG(LOG_ERR, ("pppos_input_proc[%d]: tcpip_callback() failed, dropping packet\n", pcb->num));
pbuf_free(head);
pbuf_free(inp);
LINK_STATS_INC(link.drop);
snmp_inc_ifindiscards(&pcb->netif);
}
}
#else /* PPP_INPROC_MULTITHREADED */
ppp_input(pcrx->pcb, inp);
#endif /* PPP_INPROC_MULTITHREADED */
}
/* Prepare for a new packet. */
pcrx->in_fcs = PPP_INITFCS;
pcrx->in_state = PDADDRESS;
pcrx->in_escaped = 0;
/* Other characters are usually control characters that may have
* been inserted by the physical layer so here we just drop them. */
} else {
PPPDEBUG(LOG_WARNING,
("pppos_input_proc[%d]: Dropping ACCM char <%d>\n", pcb->num, cur_char));
}
/* Process other characters. */
} else {
/* Unencode escaped characters. */
if (pcrx->in_escaped) {
pcrx->in_escaped = 0;
cur_char ^= PPP_TRANS;
}
/* Process character relative to current state. */
switch(pcrx->in_state) {
case PDIDLE: /* Idle state - waiting. */
/* Drop the character if it's not 0xff
* we would have processed a flag character above. */
if (cur_char != PPP_ALLSTATIONS) {
break;
}
/* no break */
/* Fall through */
case PDSTART: /* Process start flag. */
/* Prepare for a new packet. */
pcrx->in_fcs = PPP_INITFCS;
/* no break */
/* Fall through */
case PDADDRESS: /* Process address field. */
if (cur_char == PPP_ALLSTATIONS) {
pcrx->in_state = PDCONTROL;
break;
}
/* no break */
/* Else assume compressed address and control fields so
* fall through to get the protocol... */
case PDCONTROL: /* Process control field. */
/* If we don't get a valid control code, restart. */
if (cur_char == PPP_UI) {
pcrx->in_state = PDPROTOCOL1;
break;
}
/* no break */
#if 0
else {
PPPDEBUG(LOG_WARNING,
("pppos_input_proc[%d]: Invalid control <%d>\n", pcb->num, cur_char));
pcrx->in_state = PDSTART;
}
#endif
case PDPROTOCOL1: /* Process protocol field 1. */
/* If the lower bit is set, this is the end of the protocol
* field. */
if (cur_char & 1) {
pcrx->in_protocol = cur_char;
pcrx->in_state = PDDATA;
} else {
pcrx->in_protocol = (u_int)cur_char << 8;
pcrx->in_state = PDPROTOCOL2;
}
break;
case PDPROTOCOL2: /* Process protocol field 2. */
pcrx->in_protocol |= cur_char;
pcrx->in_state = PDDATA;
break;
case PDDATA: /* Process data byte. */
/* Make space to receive processed data. */
if (pcrx->in_tail == NULL || pcrx->in_tail->len == PBUF_POOL_BUFSIZE) {
if (pcrx->in_tail != NULL) {
pcrx->in_tail->tot_len = pcrx->in_tail->len;
if (pcrx->in_tail != pcrx->in_head) {
pbuf_cat(pcrx->in_head, pcrx->in_tail);
/* give up the in_tail reference now */
pcrx->in_tail = NULL;
}
}
/* If we haven't started a packet, we need a packet header. */
next_pbuf = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
if (next_pbuf == NULL) {
/* No free buffers. Drop the input packet and let the
* higher layers deal with it. Continue processing
* the received pbuf chain in case a new packet starts. */
PPPDEBUG(LOG_ERR, ("pppos_input_proc[%d]: NO FREE MBUFS!\n", pcb->num));
LINK_STATS_INC(link.memerr);
ppp_drop(pcrx);
pcrx->in_state = PDSTART; /* Wait for flag sequence. */
break;
}
if (pcrx->in_head == NULL) {
((u8_t*)next_pbuf->payload)[0] = pcrx->in_protocol & 0xFF;
((u8_t*)next_pbuf->payload)[1] = pcrx->in_protocol >> 8;
next_pbuf->len += sizeof(pcrx->in_protocol);
pcrx->in_head = next_pbuf;
}
pcrx->in_tail = next_pbuf;
}
/* Load character into buffer. */
((u_char*)pcrx->in_tail->payload)[pcrx->in_tail->len++] = cur_char;
break;
}
/* update the frame check sequence number. */
pcrx->in_fcs = PPP_FCS(pcrx->in_fcs, cur_char);
}
} /* while (l-- > 0), all bytes processed */
magic_randomize();
}
/* PPPoS input callback using one input pointer
* *arg is a pbuf chain of two chained pbuf, the first contains
* a pointer to the PPP PCB structure, the second contains the
* PPP payload
*/
static void pppos_input_callback(void *arg) {
struct pbuf *hd, *pl;
ppp_pcb *pcb;
hd = (struct pbuf *)arg;
pcb = (ppp_pcb *)hd->payload;
pl = hd->next;
pbuf_free(hd);
if(NULL == pl)
goto drop;
/* Dispatch the packet thereby consuming it. */
ppp_input(pcb, pl);
return;
drop:
LINK_STATS_INC(link.drop);
snmp_inc_ifindiscards(&pcb->netif);
pbuf_free(pl);
return;
}
#endif /* PPPOS_SUPPORT */
/* merge a pbuf chain into one pbuf */
struct pbuf * ppp_singlebuf(struct pbuf *p) {
struct pbuf *q, *b;
u_char *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 = q->payload; b != NULL; b = b->next) {
MEMCPY(pl, b->payload, b->len);
pl += b->len;
}
pbuf_free(p);
return q;
}
#if PPPOE_SUPPORT
static void ppp_over_ethernet_link_status_cb(ppp_pcb *pcb, int state) {
int pppoe_err_code = PPPERR_NONE;
switch(state) {
/* PPPoE link is established, starting PPP negotiation */
case PPPOE_CB_STATE_UP:
PPPDEBUG(LOG_INFO, ("ppp_over_ethernet_link_status_cb: unit %d: UP, connecting\n", pcb->num));
ppp_start(pcb);
return;
/* PPPoE link normally down (i.e. asked to do so) */
case PPPOE_CB_STATE_DOWN:
PPPDEBUG(LOG_INFO, ("ppp_over_ethernet_link_status_cb: unit %d: DOWN, disconnected\n", pcb->num));
pppoe_err_code = PPPERR_CONNECT;
break;
/* PPPoE link failed to setup (i.e. PADI/PADO timeout) */
case PPPOE_CB_STATE_FAILED:
PPPDEBUG(LOG_INFO, ("ppp_over_ethernet_link_status_cb: unit %d: FAILED, aborting\n", pcb->num));
pppoe_err_code = PPPERR_OPEN;
break;
}
/* Reconnect if persist mode is enabled */
if(pcb->settings.persist) {
if(pcb->link_status_cb)
pcb->link_status_cb(pcb->link_status_ctx, pcb->err_code ? pcb->err_code : pppoe_err_code, NULL);
pppoe_connect(pcb->pppoe_sc);
return;
}
ppp_hup(pcb);
ppp_stop(pcb);
pppoe_destroy(&pcb->netif);
if(pcb->link_status_cb)
pcb->link_status_cb(pcb->link_status_ctx, pcb->err_code ? pcb->err_code : pppoe_err_code, NULL);
ppp_destroy(pcb);
}
#endif /* PPPOE_SUPPORT */
void ppp_link_down(ppp_pcb *pcb) {
PPPDEBUG(LOG_DEBUG, ("ppp_link_down: unit %d\n", pcb->num));
#if PPPOS_SUPPORT && PPP_INPROC_OWNTHREAD
ppp_receive_wakeup(pcb);
#endif /* PPPOS_SUPPORT && PPP_INPROC_OWNTHREAD*/
}
void ppp_link_terminated(ppp_pcb *pcb) {
PPPDEBUG(LOG_DEBUG, ("ppp_link_terminated: unit %d\n", pcb->num));
#if PPPOE_SUPPORT
if (pcb->ethif) {
pppoe_disconnect(pcb->pppoe_sc);
} else
#endif /* PPPOE_SUPPORT */
{
#if PPPOS_SUPPORT
#if PPP_INPROC_OWNTHREAD
ppp_receive_wakeup(pcb);
#endif /* PPP_INPROC_OWNTHREAD */
PPPDEBUG(LOG_DEBUG, ("ppp_link_terminated: unit %d: link_status_cb=%p err_code=%d\n", pcb->num, pcb->link_status_cb, pcb->err_code));
if (pcb->link_status_cb) {
pcb->link_status_cb(pcb->link_status_ctx, pcb->err_code ? pcb->err_code : PPPERR_PROTOCOL, NULL);
}
ppp_destroy(pcb);
#endif /* PPPOS_SUPPORT */
}
PPPDEBUG(LOG_DEBUG, ("ppp_link_terminated: finished.\n"));
}
static void ppp_destroy(ppp_pcb *pcb) {
PPPDEBUG(LOG_DEBUG, ("ppp_destroy: unit %d\n", pcb->num));
memp_free(MEMP_PPP_PCB, pcb);
}
#if LWIP_NETIF_STATUS_CALLBACK
/** Set the status callback of a PPP's netif
*
* @param pd The PPP descriptor returned by pppOpen()
* @param status_callback pointer to the status callback function
*
* @see netif_set_status_callback
*/
void
ppp_set_netif_statuscallback(ppp_pcb *pcb, netif_status_callback_fn status_callback)
{
netif_set_status_callback(pcb->netif, status_callback);
}
#endif /* LWIP_NETIF_STATUS_CALLBACK */
#if LWIP_NETIF_LINK_CALLBACK
/** Set the link callback of a PPP's netif
*
* @param pd The PPP descriptor returned by pppOpen()
* @param link_callback pointer to the link callback function
*
* @see netif_set_link_callback
*/
void
ppp_set_netif_linkcallback(ppp_pcb *pcb, netif_status_callback_fn link_callback)
{
netif_set_link_callback(pcb->netif, link_callback);
}
#endif /* LWIP_NETIF_LINK_CALLBACK */
/************************************************************************
* 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;
#if PPP_NOTIFY
/* The one willing notify support should add here the code to be notified of phase changes */
#endif /* PPP_NOTIFY */
}
/*
* ppp_send_config - configure the transmit-side characteristics of
* the ppp interface.
*/
int ppp_send_config(ppp_pcb *pcb, int mtu, u_int32_t accm, int pcomp, int accomp) {
#if PPPOS_SUPPORT
int i;
#endif /* PPPOS_SUPPORT */
/* pcb->mtu = mtu; -- set correctly with netif_set_mtu */
pcb->pcomp = pcomp;
pcb->accomp = accomp;
#if PPPOS_SUPPORT
/* Load the ACCM bits for the 32 control codes. */
for (i = 0; i < 32/8; i++) {
pcb->out_accm[i] = (u_char)((accm >> (8 * i)) & 0xFF);
}
#else
LWIP_UNUSED_ARG(accm);
#endif /* PPPOS_SUPPORT */
#if PPPOS_SUPPORT
PPPDEBUG(LOG_INFO, ("ppp_send_config[%d]: out_accm=%X %X %X %X\n",
pcb->num,
pcb->out_accm[0], pcb->out_accm[1], pcb->out_accm[2], pcb->out_accm[3]));
#else
PPPDEBUG(LOG_INFO, ("ppp_send_config[%d]\n", pcb->num) );
#endif /* PPPOS_SUPPORT */
return 0;
}
/*
* ppp_recv_config - configure the receive-side characteristics of
* the ppp interface.
*/
int ppp_recv_config(ppp_pcb *pcb, int mru, u_int32_t accm, int pcomp, int accomp) {
#if PPPOS_SUPPORT
int i;
SYS_ARCH_DECL_PROTECT(lev);
#endif /* PPPOS_SUPPORT */
LWIP_UNUSED_ARG(accomp);
LWIP_UNUSED_ARG(pcomp);
LWIP_UNUSED_ARG(mru);
/* Load the ACCM bits for the 32 control codes. */
#if PPPOS_SUPPORT
SYS_ARCH_PROTECT(lev);
for (i = 0; i < 32 / 8; i++) {
/* @todo: does this work? ext_accm has been modified from pppd! */
pcb->rx.in_accm[i] = (u_char)(accm >> (i * 8));
}
SYS_ARCH_UNPROTECT(lev);
#else
LWIP_UNUSED_ARG(accm);
#endif /* PPPOS_SUPPORT */
#if PPPOS_SUPPORT
PPPDEBUG(LOG_INFO, ("ppp_recv_config[%d]: in_accm=%X %X %X %X\n",
pcb->num,
pcb->rx.in_accm[0], pcb->rx.in_accm[1], pcb->rx.in_accm[2], pcb->rx.in_accm[3]));
#else
PPPDEBUG(LOG_INFO, ("ppp_recv_config[%d]\n", pcb->num) );
#endif /* PPPOS_SUPPORT */
return 0;
}
/*
* sifaddr - Config the interface IP addresses and netmask.
*/
int sifaddr(ppp_pcb *pcb, u_int32_t our_adr, u_int32_t his_adr,
u_int32_t net_mask) {
SMEMCPY(&pcb->addrs.our_ipaddr, &our_adr, sizeof(our_adr));
SMEMCPY(&pcb->addrs.his_ipaddr, &his_adr, sizeof(his_adr));
SMEMCPY(&pcb->addrs.netmask, &net_mask, sizeof(net_mask));
return 1;
}
/********************************************************************
*
* cifaddr - Clear the interface IP addresses, and delete routes
* through the interface if possible.
*/
int cifaddr(ppp_pcb *pcb, u_int32_t our_adr, u_int32_t his_adr) {
LWIP_UNUSED_ARG(our_adr);
LWIP_UNUSED_ARG(his_adr);
IP4_ADDR(&pcb->addrs.our_ipaddr, 0,0,0,0);
IP4_ADDR(&pcb->addrs.his_ipaddr, 0,0,0,0);
IP4_ADDR(&pcb->addrs.netmask, 255,255,255,255);
return 1;
}
/*
* sdns - Config the DNS servers
*/
int sdns(ppp_pcb *pcb, u_int32_t ns1, u_int32_t ns2) {
SMEMCPY(&pcb->addrs.dns1, &ns1, sizeof(ns1));
SMEMCPY(&pcb->addrs.dns2, &ns2, sizeof(ns2));
return 1;
}
/********************************************************************
*
* cdns - Clear the DNS servers
*/
int cdns(ppp_pcb *pcb, u_int32_t ns1, u_int32_t ns2) {
LWIP_UNUSED_ARG(ns1);
LWIP_UNUSED_ARG(ns2);
IP4_ADDR(&pcb->addrs.dns1, 0,0,0,0);
IP4_ADDR(&pcb->addrs.dns2, 0,0,0,0);
return 1;
}
/*
* sifup - Config the interface up and enable IP packets to pass.
*/
int sifup(ppp_pcb *pcb) {
netif_remove(&pcb->netif);
if (!netif_add(&pcb->netif, &pcb->addrs.our_ipaddr, &pcb->addrs.netmask,
&pcb->addrs.his_ipaddr, (void *)pcb, ppp_netif_init_cb, ip_input)) {
PPPDEBUG(LOG_ERR, ("sifup[%d]: netif_add failed\n", pcb->num));
return 0;
}
netif_set_up(&pcb->netif);
pcb->if_up = 1;
pcb->err_code = PPPERR_NONE;
PPPDEBUG(LOG_DEBUG, ("sifup: unit %d: link_status_cb=%p err_code=%d\n", pcb->num, pcb->link_status_cb, pcb->err_code));
if (pcb->link_status_cb)
pcb->link_status_cb(pcb->link_status_ctx, pcb->err_code, &pcb->addrs);
return 1;
}
/********************************************************************
*
* sifdown - Disable the indicated protocol and config the interface
* down if there are no remaining protocols.
*/
int sifdown(ppp_pcb *pcb) {
pcb->if_up = 0;
/* make sure the netif status callback is called */
netif_set_down(&pcb->netif);
netif_remove(&pcb->netif);
PPPDEBUG(LOG_DEBUG, ("sifdown: unit %d: link_status_cb=%p err_code=%d\n", pcb->num, pcb->link_status_cb, pcb->err_code));
if (pcb->link_status_cb)
pcb->link_status_cb(pcb->link_status_ctx, PPPERR_CONNECT, NULL);
return 1;
}
/*
* 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;
}
/*
* netif_set_mtu - set the MTU on the PPP network interface.
*/
void netif_set_mtu(ppp_pcb *pcb, int mtu) {
pcb->mtu = mtu;
}
/*
* netif_get_mtu - get PPP interface MTU
*/
int netif_get_mtu(ppp_pcb *pcb) {
return pcb->mtu;
}
/********************************************************************
*
* sifdefaultroute - assign a default route through the address given.
*
* If the global default_rt_repl_rest flag is set, then this function
* already replaced the original system defaultroute with some other
* route and it should just replace the current defaultroute with
* another one, without saving the current route. Use: demand mode,
* when pppd sets first a defaultroute it it's temporary ppp0 addresses
* and then changes the temporary addresses to the addresses for the real
* ppp connection when it has come up.
*/
int sifdefaultroute(ppp_pcb *pcb, u_int32_t ouraddr, u_int32_t gateway, bool replace) {
LWIP_UNUSED_ARG(ouraddr);
LWIP_UNUSED_ARG(gateway);
LWIP_UNUSED_ARG(replace);
netif_set_default(&pcb->netif);
return 1;
}
/********************************************************************
*
* cifdefaultroute - delete a default route through the address given.
*/
int cifdefaultroute(ppp_pcb *pcb, u_int32_t ouraddr, u_int32_t gateway) {
LWIP_UNUSED_ARG(ouraddr);
LWIP_UNUSED_ARG(gateway);
netif_set_default(NULL);
return 1;
}
/********************************************************************
*
* sifproxyarp - Make a proxy ARP entry for the peer.
*/
int sifproxyarp(ppp_pcb *pcb, u_int32_t his_adr) {
LWIP_UNUSED_ARG(pcb);
LWIP_UNUSED_ARG(his_adr);
/* FIXME: do we really need that in IPCP ? */
return 0;
}
/********************************************************************
*
* cifproxyarp - Delete the proxy ARP entry for the peer.
*/
int cifproxyarp(ppp_pcb *pcb, u_int32_t his_adr) {
LWIP_UNUSED_ARG(pcb);
LWIP_UNUSED_ARG(his_adr);
/* FIXME: do we really need that in IPCP ? */
return 0;
}
/********************************************************************
*
* sifvjcomp - config tcp header compression
*/
int sifvjcomp(ppp_pcb *pcb, int vjcomp, int cidcomp, int maxcid) {
#if PPPOS_SUPPORT && VJ_SUPPORT
pcb->vj_enabled = vjcomp;
pcb->vj_comp.compressSlot = cidcomp;
pcb->vj_comp.maxSlotIndex = maxcid;
PPPDEBUG(LOG_INFO, ("sifvjcomp: VJ compress enable=%d slot=%d max slot=%d\n",
vjcomp, cidcomp, maxcid));
#else /* PPPOS_SUPPORT && VJ_SUPPORT */
LWIP_UNUSED_ARG(pcb);
LWIP_UNUSED_ARG(vjcomp);
LWIP_UNUSED_ARG(cidcomp);
LWIP_UNUSED_ARG(maxcid);
#endif /* PPPOS_SUPPORT && VJ_SUPPORT */
return 0;
}
/********************************************************************
*
* 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;
}
/********************************************************************
*
* 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) {
/* FIXME: necessary for "demand", do we really need to support on-demand ? */
return 0;
}
/********************************************************************
*
* 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.
*/
u_int32_t get_mask(u_int32_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
LWIP_UNUSED_ARG(addr);
return 0xFFFFFFFF;
}
#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 */
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