FreeBSD-5.3/sys/i4b/driver/i4b_isppp.c
/*
* Copyright (c) 1997 Joerg Wunsch. All rights reserved.
*
* Copyright (c) 1997, 2002 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.
*
* last edit-date: [Sat Mar 9 14:09:27 2002]
*
*---------------------------------------------------------------------------*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/i4b/driver/i4b_isppp.c,v 1.25.4.1 2004/10/14 11:48:05 rwatson Exp $");
#include "i4bisppp.h"
#include <sys/param.h>
#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 <net/if.h>
#include <net/if_types.h>
#include <net/if_sppp.h>
#include <sys/time.h>
#include <net/bpf.h>
#include <machine/i4b_ioctl.h>
#include <machine/i4b_debug.h>
#include <i4b/include/i4b_global.h>
#include <i4b/include/i4b_l3l4.h>
#include <i4b/layer4/i4b_l4.h>
NET_NEEDS_GIANT("i4b_isppp");
#define ISPPP_FMT "isp%d: "
#define ISPPP_ARG(sc) ((sc)->sc_if.if_dunit)
#define PDEVSTATIC static
#define IFP2UNIT(ifp) (ifp)->if_dunit
# 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
PDEVSTATIC void i4bispppattach(void *);
PSEUDO_SET(i4bispppattach, i4b_isppp);
#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 starts with a struct ifnet, but we gotta allocate
* more space for it. NB: do not relocate this union, it must
* be first in isppp_softc. The tls and tlf hooks below want to
* convert a ``struct sppp *'' into a ``struct isppp_softc *''.
*/
union {
struct ifnet scu_if;
struct sppp scu_sp;
} sc_if_un;
#define sc_if sc_if_un.scu_if
int sc_state; /* state of the interface */
call_desc_t *sc_cdp; /* ptr to call descriptor */
#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
struct callout_handle sc_ch;
} i4bisppp_softc[NI4BISPPP];
static void i4bisppp_init_linktab(int unit);
static int i4bisppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t 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(int unit);
/* initialized by L4 */
static drvr_link_t i4bisppp_drvr_linktab[NI4BISPPP];
static isdn_link_t *isdn_linktab[NI4BISPPP];
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
i4bispppattach(void *dummy)
{
struct i4bisppp_softc *sc = i4bisppp_softc;
int i;
#ifdef SPPP_VJ
printf("i4bisppp: %d ISDN SyncPPP device(s) attached (VJ header compression)\n", NI4BISPPP);
#else
printf("i4bisppp: %d ISDN SyncPPP device(s) attached\n", NI4BISPPP);
#endif
for(i = 0; i < NI4BISPPP; sc++, i++) {
i4bisppp_init_linktab(i);
sc->sc_if.if_softc = sc;
if_initname(&sc->sc_if, "isp", i);
sc->sc_if.if_mtu = PP_MTU;
sc->sc_if.if_flags = IFF_SIMPLEX | IFF_POINTOPOINT;
sc->sc_if.if_type = IFT_ISDNBASIC;
sc->sc_state = ST_IDLE;
sc->sc_if.if_ioctl = i4bisppp_ioctl;
/* actually initialized by sppp_attach() */
/* sc->sc_if.if_output = sppp_output; */
sc->sc_if.if_start = i4bisppp_start;
sc->sc_if.if_hdrlen = 0;
sc->sc_if.if_addrlen = 0;
sc->sc_if.if_snd.ifq_maxlen = IFQ_MAXLEN;
sc->sc_if.if_ipackets = 0;
sc->sc_if.if_ierrors = 0;
sc->sc_if.if_opackets = 0;
sc->sc_if.if_oerrors = 0;
sc->sc_if.if_collisions = 0;
sc->sc_if.if_ibytes = 0;
sc->sc_if.if_obytes = 0;
sc->sc_if.if_imcasts = 0;
sc->sc_if.if_omcasts = 0;
sc->sc_if.if_iqdrops = 0;
sc->sc_if.if_noproto = 0;
#if I4BISPPPACCT
sc->sc_if.if_timer = 0;
sc->sc_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_if_un.scu_sp.pp_tls = i4bisppp_tls;
sc->sc_if_un.scu_sp.pp_tlf = i4bisppp_tlf;
sc->sc_if_un.scu_sp.pp_con = i4bisppp_negotiation_complete;
sc->sc_if_un.scu_sp.pp_chg = i4bisppp_state_changed;
sppp_attach(&sc->sc_if);
#if 0 /* ??? -hm */
ether_ifattach(&sc->sc_if, 0);
#else
if_attach(&sc->sc_if);
#endif
CALLOUT_INIT(&sc->sc_ch);
bpfattach(&sc->sc_if, DLT_PPP, PPP_HDRLEN);
}
}
/*---------------------------------------------------------------------------*
* process ioctl
*---------------------------------------------------------------------------*/
static int
i4bisppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data)
{
struct i4bisppp_softc *sc = ifp->if_softc;
#if 0
struct sppp *sp = (struct sppp *)sc;
struct ifaddr *ifa = (struct ifaddr *) data;
struct ifreq *ifr = (struct ifreq *) data;
#endif
int error;
error = sppp_ioctl(&sc->sc_if, cmd, data);
if (error)
return error;
switch(cmd) {
case SIOCSIFFLAGS:
#if 0 /* never used ??? */
x = splimp();
if ((ifp->if_flags & IFF_UP) == 0)
UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
splx(x);
#endif
break;
}
return 0;
}
/*---------------------------------------------------------------------------*
* start output to ISDN B-channel
*---------------------------------------------------------------------------*/
static void
i4bisppp_start(struct ifnet *ifp)
{
struct i4bisppp_softc *sc = ifp->if_softc;
struct mbuf *m;
/* int s; */
int unit = IFP2UNIT(ifp);
if (sppp_isempty(ifp))
return;
if(sc->sc_state != ST_CONNECTED)
return;
/*
* s = splimp();
* ifp->if_flags |= IFF_OACTIVE; // - need to clear this somewhere
* splx(s);
*/
while ((m = sppp_dequeue(&sc->sc_if)) != NULL)
{
BPF_MTAP(ifp, m);
microtime(&ifp->if_lastchange);
IF_LOCK(isdn_linktab[unit]->tx_queue);
if(_IF_QFULL(isdn_linktab[unit]->tx_queue))
{
NDBGL4(L4_ISPDBG, "isp%d, tx queue full!", unit);
m_freem(m);
}
else
{
#if 0
sc->sc_if.if_obytes += m->m_pkthdr.len;
#endif
sc->sc_outb += m->m_pkthdr.len;
sc->sc_if.if_opackets++;
_IF_ENQUEUE(isdn_linktab[unit]->tx_queue, m);
}
IF_UNLOCK(isdn_linktab[unit]->tx_queue);
}
isdn_linktab[unit]->bch_tx_start(isdn_linktab[unit]->unit,
isdn_linktab[unit]->channel);
}
#ifdef I4BISPPPACCT
/*---------------------------------------------------------------------------*
* watchdog routine
*---------------------------------------------------------------------------*/
static void
i4bisppp_watchdog(struct ifnet *ifp)
{
struct i4bisppp_softc *sc = ifp->if_softc;
int unit = IFP2UNIT(ifp);
bchan_statistics_t bs;
(*isdn_linktab[unit]->bch_stat)
(isdn_linktab[unit]->unit, isdn_linktab[unit]->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;
i4b_l4_accounting(BDRV_ISPPP, unit, ACCT_DURING,
sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_outb, sc->sc_inb);
}
sc->sc_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
*===========================================================================*
*/
#if 0 /* never used ??? */
/*---------------------------------------------------------------------------*
* just an alias for i4bisppp_tls, but of type timeout_t
*---------------------------------------------------------------------------*/
static void
i4bisppp_timeout(void *cookie)
{
i4bisppp_tls((struct sppp *)cookie);
}
#endif
/*---------------------------------------------------------------------------*
* PPP this-layer-started action
*---------------------------------------------------------------------------*
*/
static void
i4bisppp_tls(struct sppp *sp)
{
struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
struct ifnet *ifp = (struct ifnet *)sp;
if(sc->sc_state == ST_CONNECTED)
return;
i4b_l4_dialout(BDRV_ISPPP, IFP2UNIT(ifp));
}
/*---------------------------------------------------------------------------*
* PPP this-layer-finished action
*---------------------------------------------------------------------------*
*/
static void
i4bisppp_tlf(struct sppp *sp)
{
struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
/* call_desc_t *cd = sc->sc_cdp; */
struct ifnet *ifp = (struct ifnet *)sp;
if(sc->sc_state != ST_CONNECTED)
return;
#if 0 /* never used ??? */
UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
#endif
i4b_l4_drvrdisc(BDRV_ISPPP, IFP2UNIT(ifp));
}
/*---------------------------------------------------------------------------*
* PPP interface phase change
*---------------------------------------------------------------------------*
*/
static void
i4bisppp_state_changed(struct sppp *sp, int new_state)
{
struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
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 = (struct i4bisppp_softc *)sp;
i4b_l4_negcomplete(sc->sc_cdp);
}
/*===========================================================================*
* ISDN INTERFACE ROUTINES
*===========================================================================*/
/*---------------------------------------------------------------------------*
* this routine is called from L4 handler at connect time
*---------------------------------------------------------------------------*/
static void
i4bisppp_connect(int unit, void *cdp)
{
struct i4bisppp_softc *sc = &i4bisppp_softc[unit];
struct sppp *sp = &sc->sc_if_un.scu_sp;
int s = splimp();
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_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 */
sp->pp_last_sent = sp->pp_last_recv = SECOND;
splx(s);
}
/*---------------------------------------------------------------------------*
* this routine is called from L4 handler at disconnect time
*---------------------------------------------------------------------------*/
static void
i4bisppp_disconnect(int unit, void *cdp)
{
call_desc_t *cd = (call_desc_t *)cdp;
struct i4bisppp_softc *sc = &i4bisppp_softc[unit];
struct sppp *sp = &sc->sc_if_un.scu_sp;
int s = splimp();
/* new stuff to check that the active channel is being closed */
if (cd != sc->sc_cdp)
{
NDBGL4(L4_ISPDBG, "isp%d, channel%d not active!", unit, cd->channelid);
splx(s);
return;
}
#if I4BISPPPACCT
sc->sc_if.if_timer = 0;
#endif
i4b_l4_accounting(BDRV_ISPPP, unit, 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 this 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(int unit, int status, cause_t cause)
{
struct i4bisppp_softc *sc = &i4bisppp_softc[unit];
struct sppp *sp = &sc->sc_if_un.scu_sp;
NDBGL4(L4_ISPDBG, "isp%d: status=%d, cause=%d", unit, status, cause);
if(status != DSTAT_NONE)
{
struct mbuf *m;
NDBGL4(L4_ISPDBG, "isp%d: clearing queues", unit);
if(!(sppp_isempty(&sc->sc_if)))
{
while((m = sppp_dequeue(&sc->sc_if)) != NULL)
m_freem(m);
}
sc->sc_cdp = (call_desc_t *)0;
/* do this here because pp_down calls i4bisppp_tlf */
sc->sc_state = ST_IDLE;
/*
* Ahh, sppp doesn't like to get a down event when
* dialing fails. So first tell it that we are up
* (doesn't hurt us since sc_state != ST_CONNECTED)
* and then go down.
*/
sp->pp_up(sp);
sp->pp_down(sp);
}
}
/*---------------------------------------------------------------------------*
* interface up/down
*---------------------------------------------------------------------------*/
static void
i4bisppp_updown(int unit, int 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(int unit)
{
struct i4bisppp_softc *sc = &i4bisppp_softc[unit];
struct mbuf *m;
int s;
if((m = *isdn_linktab[unit]->rx_mbuf) == NULL)
return;
m->m_pkthdr.rcvif = &sc->sc_if;
m->m_pkthdr.len = m->m_len;
microtime(&sc->sc_if.if_lastchange);
sc->sc_if.if_ipackets++;
#if 0
sc->sc_if.if_ibytes += m->m_pkthdr.len;
#endif
#if I4BISPPPACCT
sc->sc_inb += m->m_pkthdr.len;
#endif
#ifdef I4BISPPPDEBUG
printf("i4bisppp_rx_data_ready: received packet!\n");
#endif
BPF_MTAP(&sc->sc_if, m);
s = splimp();
sppp_input(&sc->sc_if, m);
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(int unit)
{
i4bisppp_start(&i4bisppp_softc[unit].sc_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(int unit)
{
struct sppp *sp;
sp = (struct sppp *) &i4bisppp_softc[unit];
return((sp->pp_last_recv < sp->pp_last_sent) ?
sp->pp_last_sent : sp->pp_last_recv);
}
/*---------------------------------------------------------------------------*
* 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(int unit, int rxtx)
{
i4bisppp_softc[unit].sc_cdp->last_active_time = SECOND;
}
/*---------------------------------------------------------------------------*
* return this drivers linktab address
*---------------------------------------------------------------------------*/
drvr_link_t *
i4bisppp_ret_linktab(int unit)
{
return(&i4bisppp_drvr_linktab[unit]);
}
/*---------------------------------------------------------------------------*
* setup the isdn_linktab for this driver
*---------------------------------------------------------------------------*/
void
i4bisppp_set_linktab(int unit, isdn_link_t *ilt)
{
isdn_linktab[unit] = ilt;
}
/*---------------------------------------------------------------------------*
* initialize this drivers linktab
*---------------------------------------------------------------------------*/
static void
i4bisppp_init_linktab(int unit)
{
i4bisppp_drvr_linktab[unit].unit = unit;
i4bisppp_drvr_linktab[unit].bch_rx_data_ready = i4bisppp_rx_data_rdy;
i4bisppp_drvr_linktab[unit].bch_tx_queue_empty = i4bisppp_tx_queue_empty;
i4bisppp_drvr_linktab[unit].bch_activity = i4bisppp_activity;
i4bisppp_drvr_linktab[unit].line_connected = i4bisppp_connect;
i4bisppp_drvr_linktab[unit].line_disconnected = i4bisppp_disconnect;
i4bisppp_drvr_linktab[unit].dial_response = i4bisppp_dialresponse;
i4bisppp_drvr_linktab[unit].updown_ind = i4bisppp_updown;
}
/*===========================================================================*/