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freebsd-dev/sys/i4b/driver/i4b_isppp.c
Poul-Henning Kamp 19c749625f Initial entry of ISDN4BSD into the FreeBSD tree. 
ISDN4BSD is the work of our brand-new comitter: Hellmuth Michaelis,
who has done a tremendous amount of work to bring us this far.

There are still some outstanding issues and files to bring into
the tree, and for now it will be needed to pick up all the extra
docs from the isdn4bsd release.

It is probably also a very good idea to subscribe to the isdn@freebsd.org
mailing list before you try this out.

These files correspond to release "beta Version 0.70.00 / December
1998" from Hellmuth.
1998-12-27 21:47:14 +00:00

711 lines
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/*
* Copyright (c) 1997 Joerg Wunsch. All rights reserved.
*
* Copyright (c) 1997, 1998 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 1.20 1998/12/18 14:20:44 hm Exp $
*
* last edit-date: [Fri Dec 18 11:47:58 1998]
*
*---------------------------------------------------------------------------*/
#include "i4bisppp.h"
#ifdef __FreeBSD__
#include "sppp.h"
#endif
#if NI4BISPPP == 0
# error "You need to define `pseudo-device sppp <N>' with options ISPPP"
#endif
#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 <sys/protosw.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/netisr.h>
#include <net/route.h>
#ifdef __FreeBSD__
#include <net/if_sppp.h>
#else
#include <i4b/sppp/if_sppp.h>
#endif
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include "bpfilter.h"
#if NBPFILTER > 0
#include <sys/time.h>
#include <net/bpf.h>
#endif
#ifdef __FreeBSD__
#include <machine/i4b_ioctl.h>
#include <machine/i4b_cause.h>
#else
#include <i4b/i4b_ioctl.h>
#include <i4b/i4b_cause.h>
#endif
#include <i4b/include/i4b_global.h>
#include <i4b/include/i4b_mbuf.h>
#include <i4b/include/i4b_l3l4.h>
#include <i4b/layer4/i4b_l4.h>
#ifdef __FreeBSD__
#define ISPPP_FMT "isp%d: "
#define ISPPP_ARG(sc) ((sc)->sc_if.if_unit)
#define PDEVSTATIC static
#define IFP2UNIT(ifp) (ifp)->if_unit
# 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_if.if_xname)
#define PDEVSTATIC /* not static */
#define IOCTL_CMD_T u_long
#define IFP2UNIT(ifp) ((struct i4bisppp_softc *)ifp->if_softc)->sc_unit
#else
# error "What system are you using?"
#endif
#ifdef __FreeBSD__
PDEVSTATIC void i4bispppattach(void *);
PSEUDO_SET(i4bispppattach, i4b_isppp);
#else
PDEVSTATIC void i4bispppattach __P((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 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 */
#ifndef __FreeBSD__
int sc_unit; /* unit number for Net/OpenBSD */
#endif
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
#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
struct callout_handle sc_ch;
#endif
} 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);
/* 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
#ifdef __FreeBSD__
i4bispppattach(void *dummy)
#else
i4bispppattach(void)
#endif
{
struct i4bisppp_softc *sc = i4bisppp_softc;
int i;
#ifndef HACK_NO_PSEUDO_ATTACH_MSG
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;
#ifdef __FreeBSD__
sc->sc_if.if_name = "isp";
#if defined(__FreeBSD_version) && __FreeBSD_version < 300001
sc->sc_if.if_next = NULL;
#endif
sc->sc_if.if_unit = i;
#else
sprintf(sc->sc_if.if_xname, "isp%d", i);
sc->sc_unit = i;
#endif
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_attach(&sc->sc_if);
#if NBPFILTER > 0
#ifdef __FreeBSD__
bpfattach(&sc->sc_if, DLT_PPP, PPP_HDRLEN);
CALLOUT_INIT(&sc->sc_ch);
#endif /* __FreeBSD__ */
#ifdef __NetBSD__
bpfattach(&sc->sc_if.if_bpf, &sc->sc_if, DLT_PPP, sizeof(u_int));
#endif
#endif
}
}
/*---------------------------------------------------------------------------*
* 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)
{
#if NBPFILTER > 0
#ifdef __FreeBSD__
if (ifp->if_bpf)
bpf_mtap(ifp, m);
#endif /* __FreeBSD__ */
#ifdef __NetBSD__
if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m);
#endif
#endif /* NBPFILTER > 0 */
microtime(&ifp->if_lastchange);
IF_ENQUEUE(isdn_linktab[unit]->tx_queue, m);
sc->sc_if.if_obytes += m->m_pkthdr.len;
sc->sc_outb += m->m_pkthdr.len;
sc->sc_if.if_opackets++;
}
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 */
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)
{
#ifdef I4BISPPPDISCDEBUG
printf("i4bisppp_disconnect: isppp%d channel%d not active\n",
cd->driver_unit, cd->channelid);
#endif
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 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(int unit, int status)
{
/* struct i4bisppp_softc *sc = &i4bisppp_softc[unit]; */
}
/*---------------------------------------------------------------------------*
* 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++;
sc->sc_if.if_ibytes += m->m_pkthdr.len;
#if I4BISPPPACCT
sc->sc_inb += m->m_pkthdr.len;
#endif
#ifdef I4BISPPPDEBUG
printf("i4bisppp_rx_data_ready: received packet!\n");
#endif
#if NBPFILTER > 0
#ifdef __FreeBSD__
if(sc->sc_if.if_bpf)
bpf_mtap(&sc->sc_if, m);
#endif /* __FreeBSD__ */
#ifdef __NetBSD__
if(sc->sc_if.if_bpf)
bpf_mtap(sc->sc_if.if_bpf, m);
#endif
#endif /* NBPFILTER > 0 */
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 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;
}
/*===========================================================================*/
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