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NetBSD/sys/netisdn/i4b_isppp.c
pooka b014350f7f Redefine bpf linkage through an always present op vector, i.e. 
#if NBPFILTER is no longer required in the client.  This change
doesn't yet add support for loading bpf as a module, since drivers
can register before bpf is attached.  However, callers of bpf can
now be modularized.

Dynamically loadable bpf could probably be done fairly easily with
coordination from the stub driver and the real driver by registering
attachments in the stub before the real driver is loaded and doing
a handoff.  ... and I'm not going to ponder the depths of unload
here.

Tested with i386/MONOLITHIC, modified MONOLITHIC without bpf and rump.
2010-01-19 22:08:16 +00:00

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/*
* Copyright (c) 1997 Joerg Wunsch. All rights reserved.
*
* Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND 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 AUTHOR OR 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.
*
*---------------------------------------------------------------------------
*
* i4b_isppp.c - isdn4bsd kernel SyncPPP driver
* --------------------------------------------
*
* Uses Serge Vakulenko's sppp backend (originally contributed with
* the "cx" driver for Cronyx's HDLC-in-hardware device). This driver
* is only the glue between sppp and i4b.
*
* $Id: i4b_isppp.c,v 1.26 2010/01/19 22:08:17 pooka Exp $
*
* $FreeBSD$
*
* last edit-date: [Fri Jan 5 11:33:47 2001]
*
*---------------------------------------------------------------------------*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: i4b_isppp.c,v 1.26 2010/01/19 22:08:17 pooka Exp $");
#ifndef __NetBSD__
#define USE_ISPPP
#endif
#include "ippp.h"
#ifndef USE_ISPPP
#ifdef __FreeBSD__
#include "sppp.h"
#endif
#ifndef __NetBSD__
#if NI4BISPPP == 0
# error "You need to define `pseudo-device sppp <N>' with options ISPPP"
#endif
#endif
#endif
#include <sys/param.h>
/*
* XXX - sys/param.h on alpha (indirectly) includes sys/signal.h, which
* defines sc_sp - interfering with our use of this identifier.
* Just undef it for now.
*/
#undef sc_sp
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/ioccom.h>
#include <sys/sockio.h>
#include <sys/kernel.h>
#include <sys/protosw.h>
#include <sys/callout.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/netisr.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <net/slcompress.h>
#include <net/if_spppvar.h>
#if defined(__FreeBSD_version) && __FreeBSD_version >= 400008
#include "bpf.h"
#else
#define NBPFILTER 1
#endif
#if NBPFILTER > 0 || NBPF > 0
#include <sys/time.h>
#include <net/bpf.h>
#endif
#ifdef __FreeBSD__
#include <machine/i4b_ioctl.h>
#include <machine/i4b_cause.h>
#include <machine/i4b_debug.h>
#else
#include <netisdn/i4b_ioctl.h>
#include <netisdn/i4b_cause.h>
#include <netisdn/i4b_debug.h>
#endif
#include <netisdn/i4b_global.h>
#include <netisdn/i4b_mbuf.h>
#include <netisdn/i4b_l3l4.h>
#include <netisdn/i4b_l4.h>
#ifdef __FreeBSD__
#define ISPPP_FMT "ippp%d: "
#define ISPPP_ARG(sc) ((sc)->sc_if.if_unit)
#define PDEVSTATIC static
# if __FreeBSD_version >= 300001
# define CALLOUT_INIT(chan) callout_handle_init(chan)
# define TIMEOUT(fun, arg, chan, tick) chan = timeout(fun, arg, tick)
# define UNTIMEOUT(fun, arg, chan) untimeout(fun, arg, chan)
# define IOCTL_CMD_T u_long
# else
# define CALLOUT_INIT(chan) do {} while(0)
# define TIMEOUT(fun, arg, chan, tick) timeout(fun, arg, tick)
# define UNTIMEOUT(fun, arg, chan) untimeout(fun, arg)
# define IOCTL_CMD_T int
# endif
#elif defined __NetBSD__ || defined __OpenBSD__
#define ISPPP_FMT "%s: "
#define ISPPP_ARG(sc) ((sc)->sc_sp.pp_if.if_xname)
#define PDEVSTATIC /* not static */
#define IOCTL_CMD_T u_long
#else
# error "What system are you using?"
#endif
#ifdef __FreeBSD__
PDEVSTATIC void ipppattach(void *);
PSEUDO_SET(ipppattach, i4b_isppp);
#else
PDEVSTATIC void ipppattach(void);
#endif
#define I4BISPPPACCT 1 /* enable accounting messages */
#define I4BISPPPACCTINTVL 2 /* accounting msg interval in secs */
#define I4BISPPPDISCDEBUG 1
#define PPP_HDRLEN 4 /* 4 octetts PPP header length */
struct i4bisppp_softc {
struct sppp sc_sp; /* we are derived from struct sppp */
int sc_state; /* state of the interface */
#ifndef __FreeBSD__
int sc_unit; /* unit number for Net/OpenBSD */
#endif
call_desc_t *sc_cdp; /* ptr to call descriptor */
isdn_link_t *sc_ilt; /* B channel driver and state */
#ifdef I4BISPPPACCT
int sc_iinb; /* isdn driver # of inbytes */
int sc_ioutb; /* isdn driver # of outbytes */
int sc_inb; /* # of bytes rx'd */
int sc_outb; /* # of bytes tx'd */
int sc_linb; /* last # of bytes rx'd */
int sc_loutb; /* last # of bytes tx'd */
int sc_fn; /* flag, first null acct */
#endif
#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
struct callout_handle sc_ch;
#endif
} i4bisppp_softc[NIPPP];
static int i4bisppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, void *data);
#if 0
static void i4bisppp_send(struct ifnet *ifp);
#endif
static void i4bisppp_start(struct ifnet *ifp);
#if 0 /* never used ??? */
static void i4bisppp_timeout(void *cookie);
#endif
static void i4bisppp_tls(struct sppp *sp);
static void i4bisppp_tlf(struct sppp *sp);
static void i4bisppp_state_changed(struct sppp *sp, int new_state);
static void i4bisppp_negotiation_complete(struct sppp *sp);
static void i4bisppp_watchdog(struct ifnet *ifp);
time_t i4bisppp_idletime(void *softc);
static void i4bisppp_rx_data_rdy(void *softc);
static void i4bisppp_tx_queue_empty(void *softc);
static void i4bisppp_activity(void *softc, int rxtx);
static void i4bisppp_connect(void *softc, void *cdp);
static void i4bisppp_disconnect(void *softc, void *cdp);
static void i4bisppp_dialresponse(void *softc, int status, cause_t cause);
static void i4bisppp_updown(void *softc, int updown);
static void* i4bisppp_ret_softc(int unit);
static void i4bisppp_set_linktab(void *softc, isdn_link_t *ilt);
static const struct isdn_l4_driver_functions
ippp_l4_functions = {
/* L4<->B-channel functions */
i4bisppp_rx_data_rdy,
i4bisppp_tx_queue_empty,
i4bisppp_activity,
i4bisppp_connect,
i4bisppp_disconnect,
i4bisppp_dialresponse,
i4bisppp_updown,
/* Management functions */
i4bisppp_ret_softc,
i4bisppp_set_linktab,
i4bisppp_idletime
};
static int ippp_drvr_id = -1;
enum i4bisppp_states {
ST_IDLE, /* initialized, ready, idle */
ST_DIALING, /* dialling out to remote */
ST_CONNECTED, /* connected to remote */
};
/*===========================================================================*
* DEVICE DRIVER ROUTINES
*===========================================================================*/
/*---------------------------------------------------------------------------*
* interface attach routine at kernel boot time
*---------------------------------------------------------------------------*/
PDEVSTATIC void
#ifdef __FreeBSD__
ipppattach(void *dummy)
#else
ipppattach(void)
#endif
{
struct i4bisppp_softc *sc = i4bisppp_softc;
int i;
ippp_drvr_id = isdn_l4_driver_attach("ippp", NIPPP, &ippp_l4_functions);
for(i = 0; i < NIPPP; sc++, i++) {
sc->sc_sp.pp_if.if_softc = sc;
sc->sc_ilt = NULL;
#ifdef __FreeBSD__
sc->sc_sp.pp_if.if_name = "ippp";
#if defined(__FreeBSD_version) && __FreeBSD_version < 300001
sc->sc_sp.pp_if.if_next = NULL;
#endif
sc->sc_sp.pp_if.if_unit = i;
#else
snprintf(sc->sc_sp.pp_if.if_xname,
sizeof(sc->sc_sp.pp_if.if_xname), "ippp%d", i);
sc->sc_unit = i;
#endif
sc->sc_sp.pp_if.if_mtu = PP_MTU;
#ifdef __NetBSD__
sc->sc_sp.pp_if.if_flags = IFF_SIMPLEX | IFF_POINTOPOINT |
IFF_MULTICAST;
#else
sc->sc_sp.pp_if.if_flags = IFF_SIMPLEX | IFF_POINTOPOINT;
#endif
sc->sc_sp.pp_if.if_type = IFT_ISDNBASIC;
sc->sc_state = ST_IDLE;
sc->sc_sp.pp_if.if_ioctl = i4bisppp_ioctl;
/* actually initialized by sppp_attach() */
/* sc->sc_sp.pp_if.if_output = sppp_output; */
sc->sc_sp.pp_if.if_start = i4bisppp_start;
sc->sc_sp.pp_if.if_hdrlen = 0;
sc->sc_sp.pp_if.if_addrlen = 0;
IFQ_SET_MAXLEN(&sc->sc_sp.pp_if.if_snd, IFQ_MAXLEN);
IFQ_SET_READY(&sc->sc_sp.pp_if.if_snd);
sc->sc_sp.pp_if.if_ipackets = 0;
sc->sc_sp.pp_if.if_ierrors = 0;
sc->sc_sp.pp_if.if_opackets = 0;
sc->sc_sp.pp_if.if_oerrors = 0;
sc->sc_sp.pp_if.if_collisions = 0;
sc->sc_sp.pp_if.if_ibytes = 0;
sc->sc_sp.pp_if.if_obytes = 0;
sc->sc_sp.pp_if.if_imcasts = 0;
sc->sc_sp.pp_if.if_omcasts = 0;
sc->sc_sp.pp_if.if_iqdrops = 0;
sc->sc_sp.pp_if.if_noproto = 0;
#if I4BISPPPACCT
sc->sc_sp.pp_if.if_timer = 0;
sc->sc_sp.pp_if.if_watchdog = i4bisppp_watchdog;
sc->sc_iinb = 0;
sc->sc_ioutb = 0;
sc->sc_inb = 0;
sc->sc_outb = 0;
sc->sc_linb = 0;
sc->sc_loutb = 0;
sc->sc_fn = 1;
#endif
sc->sc_sp.pp_tls = i4bisppp_tls;
sc->sc_sp.pp_tlf = i4bisppp_tlf;
sc->sc_sp.pp_con = i4bisppp_negotiation_complete;
sc->sc_sp.pp_chg = i4bisppp_state_changed;
sc->sc_sp.pp_framebytes = 0; /* no framing added by hardware */
#if defined(__FreeBSD_version) && ((__FreeBSD_version >= 500009) || (410000 <= __FreeBSD_version && __FreeBSD_version < 500000))
/* do not call bpfattach in ether_ifattach */
ether_ifattach(&sc->sc_sp.pp_if, 0);
#else
if_attach(&sc->sc_sp.pp_if);
#endif
#ifndef USE_ISPPP
sppp_attach(&sc->sc_sp.pp_if);
#else
isppp_attach(&sc->sc_sp.pp_if);
#endif
#if NBPFILTER > 0 || NBPF > 0
#ifdef __FreeBSD__
bpfattach(&sc->sc_sp.pp_if, DLT_PPP, PPP_HDRLEN);
CALLOUT_INIT(&sc->sc_ch);
#endif /* __FreeBSD__ */
#ifdef __NetBSD__
bpf_ops->bpf_attach(&sc->sc_sp.pp_if, DLT_PPP, sizeof(u_int), &sc->sc_sp.pp_if.if_bpf);
#endif
#endif
}
}
/*---------------------------------------------------------------------------*
* process ioctl
*---------------------------------------------------------------------------*/
static int
i4bisppp_ioctl(struct ifnet *ifp, unsigned long cmd, void *data)
{
struct i4bisppp_softc *sc = ifp->if_softc;
#ifndef USE_ISPPP
return sppp_ioctl(&sc->sc_sp.pp_if, cmd, data);
#else
return isppp_ioctl(&sc->sc_sp.pp_if, cmd, data);
#endif
}
/*---------------------------------------------------------------------------*
* start output to ISDN B-channel
*---------------------------------------------------------------------------*/
static void
i4bisppp_start(struct ifnet *ifp)
{
struct i4bisppp_softc *sc = ifp->if_softc;
struct mbuf *m;
#ifndef USE_ISPPP
if (sppp_isempty(ifp))
#else
if (isppp_isempty(ifp))
#endif
return;
if(sc->sc_state != ST_CONNECTED)
return;
/*
* s = splnet();
* ifp->if_flags |= IFF_OACTIVE; // - need to clear this somewhere
* splx(s);
*/
#ifndef USE_ISPPP
while ((m = sppp_dequeue(&sc->sc_sp.pp_if)) != NULL)
#else
while ((m = isppp_dequeue(&sc->sc_sp.pp_if)) != NULL)
#endif
{
#if NBPFILTER > 0 || NBPF > 0
#ifdef __FreeBSD__
if (ifp->if_bpf)
bpf_mtap(ifp, m);
#endif /* __FreeBSD__ */
#ifdef __NetBSD__
if (ifp->if_bpf)
bpf_ops->bpf_mtap(ifp->if_bpf, m);
#endif
#endif /* NBPFILTER > 0 || NBPF > 0 */
if(IF_QFULL(sc->sc_ilt->tx_queue))
{
NDBGL4(L4_ISPDBG, "%s, tx queue full!", sc->sc_sp.pp_if.if_xname);
m_freem(m);
}
else
{
IF_ENQUEUE(sc->sc_ilt->tx_queue, m);
#if 0
sc->sc_sp.pp_if.if_obytes += m->m_pkthdr.len;
#endif
sc->sc_outb += m->m_pkthdr.len;
sc->sc_sp.pp_if.if_opackets++;
}
}
sc->sc_ilt->bchannel_driver->bch_tx_start(sc->sc_ilt->l1token,
sc->sc_ilt->channel);
}
#ifdef I4BISPPPACCT
/*---------------------------------------------------------------------------*
* watchdog routine
*---------------------------------------------------------------------------*/
static void
i4bisppp_watchdog(struct ifnet *ifp)
{
struct i4bisppp_softc *sc = ifp->if_softc;
bchan_statistics_t bs;
(*sc->sc_ilt->bchannel_driver->bch_stat)
(sc->sc_ilt->l1token, sc->sc_ilt->channel, &bs);
sc->sc_ioutb += bs.outbytes;
sc->sc_iinb += bs.inbytes;
if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
{
int ri = (sc->sc_iinb - sc->sc_linb)/I4BISPPPACCTINTVL;
int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BISPPPACCTINTVL;
if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
sc->sc_fn = 0;
else
sc->sc_fn = 1;
sc->sc_linb = sc->sc_iinb;
sc->sc_loutb = sc->sc_ioutb;
if (sc->sc_cdp)
i4b_l4_accounting(sc->sc_cdp->cdid, ACCT_DURING,
sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_outb, sc->sc_inb);
}
sc->sc_sp.pp_if.if_timer = I4BISPPPACCTINTVL;
#if 0 /* old stuff, keep it around */
printf(ISPPP_FMT "transmit timeout\n", ISPPP_ARG(sc));
i4bisppp_start(ifp);
#endif
}
#endif /* I4BISPPPACCT */
/*
*===========================================================================*
* SyncPPP layer interface routines
*===========================================================================*
*/
/*---------------------------------------------------------------------------*
* PPP this-layer-started action
*---------------------------------------------------------------------------*
*/
static void
i4bisppp_tls(struct sppp *sp)
{
struct i4bisppp_softc *sc = sp->pp_if.if_softc;
if(sc->sc_state == ST_CONNECTED)
return;
i4b_l4_dialout(ippp_drvr_id, sc->sc_unit);
}
/*---------------------------------------------------------------------------*
* PPP this-layer-finished action
*---------------------------------------------------------------------------*
*/
static void
i4bisppp_tlf(struct sppp *sp)
{
struct i4bisppp_softc *sc = sp->pp_if.if_softc;
if(sc->sc_state != ST_CONNECTED)
return;
i4b_l4_drvrdisc(sc->sc_cdp->cdid);
}
/*---------------------------------------------------------------------------*
* PPP interface phase change
*---------------------------------------------------------------------------*
*/
static void
i4bisppp_state_changed(struct sppp *sp, int new_state)
{
struct i4bisppp_softc *sc = sp->pp_if.if_softc;
i4b_l4_ifstate_changed(sc->sc_cdp, new_state);
}
/*---------------------------------------------------------------------------*
* PPP control protocol negotiation complete (run ip-up script now)
*---------------------------------------------------------------------------*
*/
static void
i4bisppp_negotiation_complete(struct sppp *sp)
{
struct i4bisppp_softc *sc = sp->pp_if.if_softc;
i4b_l4_negcomplete(sc->sc_cdp);
}
/*===========================================================================*
* ISDN INTERFACE ROUTINES
*===========================================================================*/
/*---------------------------------------------------------------------------*
* this routine is called from L4 handler at connect time
*---------------------------------------------------------------------------*/
static void
i4bisppp_connect(void *softc, void *cdp)
{
struct i4bisppp_softc *sc = softc;
struct sppp *sp = &sc->sc_sp;
int s = splnet();
sc->sc_cdp = (call_desc_t *)cdp;
sc->sc_state = ST_CONNECTED;
#if I4BISPPPACCT
sc->sc_iinb = 0;
sc->sc_ioutb = 0;
sc->sc_inb = 0;
sc->sc_outb = 0;
sc->sc_linb = 0;
sc->sc_loutb = 0;
sc->sc_sp.pp_if.if_timer = I4BISPPPACCTINTVL;
#endif
#if 0 /* never used ??? */
UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
#endif
sp->pp_up(sp); /* tell PPP we are ready */
#ifndef __NetBSD__
sp->pp_last_sent = sp->pp_last_recv = SECOND;
#endif
splx(s);
}
/*---------------------------------------------------------------------------*
* this routine is called from L4 handler at disconnect time
*---------------------------------------------------------------------------*/
static void
i4bisppp_disconnect(void *softc, void *cdp)
{
call_desc_t *cd = (call_desc_t *)cdp;
struct i4bisppp_softc *sc = softc;
struct sppp *sp = &sc->sc_sp;
int s = splnet();
/* new stuff to check that the active channel is being closed */
if (cd != sc->sc_cdp)
{
NDBGL4(L4_ISPDBG, "%s: channel%d not active!", sp->pp_if.if_xname,
cd->channelid);
splx(s);
return;
}
#if I4BISPPPACCT
sc->sc_sp.pp_if.if_timer = 0;
#endif
i4b_l4_accounting(cd->cdid, ACCT_FINAL,
sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_outb, sc->sc_inb);
if (sc->sc_state == ST_CONNECTED)
{
#if 0 /* never used ??? */
UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
#endif
sc->sc_cdp = (call_desc_t *)0;
/* do thhis here because pp_down calls i4bisppp_tlf */
sc->sc_state = ST_IDLE;
sp->pp_down(sp); /* tell PPP we have hung up */
}
splx(s);
}
/*---------------------------------------------------------------------------*
* this routine is used to give a feedback from userland demon
* in case of dial problems
*---------------------------------------------------------------------------*/
static void
i4bisppp_dialresponse(void *softc, int status, cause_t cause)
{
struct i4bisppp_softc *sc = softc;
NDBGL4(L4_ISPDBG, "%s: status=%d, cause=%d", sc->sc_sp.pp_if.if_xname, status, cause);
if(status != DSTAT_NONE)
{
struct mbuf *m;
NDBGL4(L4_ISPDBG, "%s: clearing queues", sc->sc_sp.pp_if.if_xname);
#ifndef USE_ISPPP
if(!(sppp_isempty(&sc->sc_sp.pp_if)))
#else
if(!(isppp_isempty(&sc->sc_sp.pp_if)))
#endif
{
#ifndef USE_ISPPP
while((m = sppp_dequeue(&sc->sc_sp.pp_if)) != NULL)
#else
while((m = isppp_dequeue(&sc->sc_sp.pp_if)) != NULL)
#endif
m_freem(m);
}
}
}
/*---------------------------------------------------------------------------*
* interface up/down
*---------------------------------------------------------------------------*/
static void
i4bisppp_updown(void *softc, int updown)
{
(void)softc;
(void)updown;
/* could probably do something useful here */
}
/*---------------------------------------------------------------------------*
* this routine is called from the HSCX interrupt handler
* when a new frame (mbuf) has been received and was put on
* the rx queue.
*---------------------------------------------------------------------------*/
static void
i4bisppp_rx_data_rdy(void *softc)
{
struct i4bisppp_softc *sc = softc;
struct mbuf *m;
int s;
if((m = *sc->sc_ilt->rx_mbuf) == NULL)
return;
m->m_pkthdr.rcvif = &sc->sc_sp.pp_if;
m->m_pkthdr.len = m->m_len;
sc->sc_sp.pp_if.if_ipackets++;
#if I4BISPPPACCT
sc->sc_inb += m->m_pkthdr.len;
#endif
#ifdef I4BISPPPDEBUG
printf("i4bisppp_rx_data_ready: received packet!\n");
#endif
#if NBPFILTER > 0 || NBPF > 0
#ifdef __FreeBSD__
if(sc->sc_sp.pp_if.if_bpf)
bpf_mtap(&sc->sc_sp.pp_if, m);
#endif /* __FreeBSD__ */
#ifdef __NetBSD__
if(sc->sc_sp.pp_if.if_bpf)
bpf_ops->bpf_mtap(sc->sc_sp.pp_if.if_bpf, m);
#endif
#endif /* NBPFILTER > 0 || NBPF > 0 */
s = splnet();
#ifndef USE_ISPPP
sppp_input(&sc->sc_sp.pp_if, m);
#else
isppp_input(&sc->sc_sp.pp_if, m);
#endif
splx(s);
}
/*---------------------------------------------------------------------------*
* this routine is called from the HSCX interrupt handler
* when the last frame has been sent out and there is no
* further frame (mbuf) in the tx queue.
*---------------------------------------------------------------------------*/
static void
i4bisppp_tx_queue_empty(void *softc)
{
struct sppp *sp = &((struct i4bisppp_softc *)softc)->sc_sp;
i4bisppp_start(&sp->pp_if);
}
/*---------------------------------------------------------------------------*
* THIS should be used instead of last_active_time to implement
* an activity timeout mechanism.
*
* Sending back the time difference unneccessarily complicates the
* idletime checks in i4b_l4.c. Return the largest time instead.
* That way the code in i4b_l4.c needs only minimal changes.
*---------------------------------------------------------------------------*/
time_t
i4bisppp_idletime(void *softc)
{
struct sppp *sp = &((struct i4bisppp_softc *)softc)->sc_sp;
return sp->pp_last_activity;
}
/*---------------------------------------------------------------------------*
* this routine is called from the HSCX interrupt handler
* each time a packet is received or transmitted. It should
* be used to implement an activity timeout mechanism.
*---------------------------------------------------------------------------*/
static void
i4bisppp_activity(void *softc, int rxtx)
{
struct i4bisppp_softc *sc = softc;
sc->sc_cdp->last_active_time = SECOND;
}
/*---------------------------------------------------------------------------*
* return this drivers linktab address
*---------------------------------------------------------------------------*/
static void *
i4bisppp_ret_softc(int unit)
{
return &i4bisppp_softc[unit];
}
/*---------------------------------------------------------------------------*
* setup the isdn_linktab for this driver
*---------------------------------------------------------------------------*/
static void
i4bisppp_set_linktab(void *softc, isdn_link_t *ilt)
{
struct i4bisppp_softc *sc = softc;
sc->sc_ilt = ilt;
}
/*===========================================================================*/
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