df5e198723
before adding/removing packets from the queue. Also, the if_obytes and if_omcasts fields should only be manipulated under protection of the mutex. IF_ENQUEUE, IF_PREPEND, and IF_DEQUEUE perform all necessary locking on the queue. An IF_LOCK macro is provided, as well as the old (mutex-less) versions of the macros in the form _IF_ENQUEUE, _IF_QFULL, for code which needs them, but their use is discouraged. Two new macros are introduced: IF_DRAIN() to drain a queue, and IF_HANDOFF, which takes care of locking/enqueue, and also statistics updating/start if necessary.
563 lines
16 KiB
C
563 lines
16 KiB
C
/*
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* Copyright (c) 1998, 1999 Bert Driehuis. All rights reserved.
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*
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* Copyright (c) 1997, 1998 Hellmuth Michaelis. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*---------------------------------------------------------------------------
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*
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* i4b_bsdi_ibc.c - isdn4bsd kernel BSD/OS point to point driver
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* -------------------------------------------------------------
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*
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* $Id: i4b_bsdi_ibc.c,v 1.3 2000/08/21 07:21:07 hm Exp $
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*
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* $FreeBSD$
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*
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* last edit-date: [Tue Dec 14 21:55:24 1999]
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*
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*---------------------------------------------------------------------------*/
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#include "ibc.h"
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#if NIBC > 0
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/errno.h>
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#include <sys/ioccom.h>
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#include <sys/ttycom.h>
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#include <sys/sockio.h>
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#include <sys/kernel.h>
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#include <sys/protosw.h>
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#include <net/if.h>
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#include <net/if_types.h>
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#include <net/if_p2p.h>
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#include <net/netisr.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/in_var.h>
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#include <netinet/ip.h>
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#include <i4b/i4b_ioctl.h>
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#include <i4b/i4b_cause.h>
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#include <i4b/include/i4b_global.h>
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#include <i4b/include/i4b_mbuf.h>
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#include <i4b/include/i4b_l3l4.h>
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#include <i4b/layer4/i4b_l4.h>
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#define IFP2UNIT(ifp) (ifp)->if_unit
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#define IOCTL_CMD_T u_long
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void ibcattach(void *);
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#define IBCACCT 1 /* enable accounting messages */
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#define IBCACCTINTVL 2 /* accounting msg interval in secs */
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#define PPP_HDRLEN 4 /* 4 octets PPP header length */
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struct ibc_softc {
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struct p2pcom sc_p2pcom;
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int sc_state; /* state of the interface */
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call_desc_t *sc_cdp; /* ptr to call descriptor */
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#ifdef IBCACCT
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int sc_iinb; /* isdn driver # of inbytes */
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int sc_ioutb; /* isdn driver # of outbytes */
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int sc_inb; /* # of bytes rx'd */
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int sc_outb; /* # of bytes tx'd */
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int sc_linb; /* last # of bytes rx'd */
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int sc_loutb; /* last # of bytes tx'd */
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int sc_fn; /* flag, first null acct */
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#endif
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} ibc_softc[NIBC];
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static void ibc_init_linktab(int unit);
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static int ibc_start(struct ifnet *ifp);
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static int ibc_watchdog(int unit);
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static int ibc_mdmctl(struct p2pcom *pp, int flag);
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static int ibc_getmdm(struct p2pcom *pp, caddr_t arg);
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/* initialized by L4 */
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static drvr_link_t ibc_drvr_linktab[NIBC];
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static isdn_link_t *isdn_ibc_lt[NIBC];
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enum ibc_states {
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ST_IDLE, /* initialized, ready, idle */
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ST_DIALING, /* dialling out to remote */
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ST_CONNECTED, /* connected to remote */
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};
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int ibcdebug = 0; /* Use bpatch to set this for debug printf's */
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#define DBG(x) if (ibcdebug) printf x
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/*===========================================================================*
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* DEVICE DRIVER ROUTINES
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*===========================================================================*/
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/*---------------------------------------------------------------------------*
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* interface attach routine at kernel boot time
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*---------------------------------------------------------------------------*/
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void
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ibcattach(void *dummy)
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{
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struct ibc_softc *sc = ibc_softc;
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struct ifnet *ifp;
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int i;
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#ifndef HACK_NO_PSEUDO_ATTACH_MSG
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printf("ibc: %d ISDN ibc device(s) attached\n",
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NIBC);
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#endif
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for(i = 0; i < NIBC; sc++, i++) {
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ibc_init_linktab(i);
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sc->sc_p2pcom.p2p_mdmctl = ibc_mdmctl;
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sc->sc_p2pcom.p2p_getmdm = ibc_getmdm;
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sc->sc_state = ST_IDLE;
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ifp = &sc->sc_p2pcom.p2p_if;
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ifp->if_name = "ibc";
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ifp->if_next = NULL;
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ifp->if_unit = i;
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ifp->if_mtu = 1500 /*XXX*/;
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ifp->if_baudrate = 64000;
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ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT;
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ifp->if_type = IFT_ISDNBASIC;
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ifp->if_start = ibc_start;
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ifp->if_output = 0;
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ifp->if_ioctl = p2p_ioctl;
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ifp->if_hdrlen = 0;
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ifp->if_addrlen = 0;
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ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
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ifp->if_ipackets = 0;
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ifp->if_ierrors = 0;
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ifp->if_opackets = 0;
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ifp->if_oerrors = 0;
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ifp->if_collisions = 0;
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ifp->if_ibytes = 0;
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ifp->if_obytes = 0;
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ifp->if_imcasts = 0;
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ifp->if_omcasts = 0;
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ifp->if_iqdrops = 0;
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ifp->if_noproto = 0;
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#if IBCACCT
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ifp->if_timer = 0;
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ifp->if_watchdog = ibc_watchdog;
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sc->sc_iinb = 0;
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sc->sc_ioutb = 0;
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sc->sc_inb = 0;
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sc->sc_outb = 0;
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sc->sc_linb = 0;
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sc->sc_loutb = 0;
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sc->sc_fn = 1;
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#endif
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#if defined(__FreeBSD_version) && ((__FreeBSD_version >= 500009) || (410000 <= __FreeBSD_version && __FreeBSD_version < 500000))
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ether_ifattach(ifp, 0);
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#else
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if_attach(ifp);
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#endif
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p2p_attach(&sc->sc_p2pcom);
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}
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}
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static struct mbuf *
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p2p_dequeue(struct p2pcom *pp)
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{
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struct mbuf *m;
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IF_DEQUEUE(&pp->p2p_isnd, m);
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if (m == 0)
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IF_DEQUEUE(&pp->p2p_if.if_snd, m);
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return m;
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}
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/*---------------------------------------------------------------------------*
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* start output to ISDN B-channel
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*---------------------------------------------------------------------------*/
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static int
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ibc_start(struct ifnet *ifp)
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{
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int unit = IFP2UNIT(ifp);
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struct ibc_softc *sc = (struct ibc_softc *)&ibc_softc[unit];
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struct p2pcom *pp = &sc->sc_p2pcom;
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struct mbuf *m;
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int s;
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if(sc->sc_state != ST_CONNECTED) {
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DBG(("ibc%d: ibc_start called with sc_state=%d\n",
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unit, sc->sc_state));
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return 0;
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}
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s = SPLI4B();
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IF_LOCK(isdn_ibc_lt[unit]->tx_queue);
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if (_IF_QFULL(isdn_ibc_lt[unit]->tx_queue)) {
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IF_UNLOCK(isdn_ibc_lt[unit]->tx_queue);
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splx(s);
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return 0;
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}
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m = p2p_dequeue(pp);
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if (m == NULL) {
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IF_UNLOCK(isdn_ibc_lt[unit]->tx_queue);
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splx(s);
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return 0;
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}
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do {
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microtime(&ifp->if_lastchange);
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ifp->if_obytes += m->m_pkthdr.len;
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sc->sc_outb += m->m_pkthdr.len;
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_IF_ENQUEUE(isdn_ibc_lt[unit]->tx_queue, m);
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ifp->if_opackets++;
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} while (!_IF_QFULL(isdn_ibc_lt[unit]->tx_queue) &&
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(m = p2p_dequeue(pp)) != NULL);
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IF_UNLOCK(isdn_ibc_lt[unit]->tx_queue);
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isdn_ibc_lt[unit]->bch_tx_start(isdn_ibc_lt[unit]->unit,
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isdn_ibc_lt[unit]->channel);
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splx(s);
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return 0;
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}
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#ifdef IBCACCT
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/*---------------------------------------------------------------------------*
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* watchdog routine
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*---------------------------------------------------------------------------*/
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static int
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ibc_watchdog(int unit)
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{
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struct ibc_softc *sc = &ibc_softc[unit];
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struct ifnet *ifp = &sc->sc_p2pcom.p2p_if;
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bchan_statistics_t bs;
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(*isdn_ibc_lt[unit]->bch_stat)
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(isdn_ibc_lt[unit]->unit, isdn_ibc_lt[unit]->channel, &bs);
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sc->sc_ioutb += bs.outbytes;
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sc->sc_iinb += bs.inbytes;
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if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
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{
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int ri = (sc->sc_iinb - sc->sc_linb)/IBCACCTINTVL;
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int ro = (sc->sc_ioutb - sc->sc_loutb)/IBCACCTINTVL;
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if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
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sc->sc_fn = 0;
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else
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sc->sc_fn = 1;
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sc->sc_linb = sc->sc_iinb;
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sc->sc_loutb = sc->sc_ioutb;
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i4b_l4_accounting(BDRV_IBC, unit, ACCT_DURING,
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sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_outb, sc->sc_inb);
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}
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ifp->if_timer = IBCACCTINTVL;
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return 0;
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}
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#endif /* IBCACCT */
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/*
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*===========================================================================*
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* P2P layer interface routines
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*===========================================================================*
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*/
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#if 0
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/*---------------------------------------------------------------------------*
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* PPP interface phase change
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*---------------------------------------------------------------------------*
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*/
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static void
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ibc_state_changed(struct sppp *sp, int new_state)
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{
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struct ibc_softc *sc = (struct ibc_softc *)sp;
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i4b_l4_ifstate_changed(sc->sc_cdp, new_state);
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}
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/*---------------------------------------------------------------------------*
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* PPP control protocol negotiation complete (run ip-up script now)
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*---------------------------------------------------------------------------*
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*/
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static void
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ibc_negotiation_complete(struct sppp *sp)
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{
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struct ibc_softc *sc = (struct ibc_softc *)sp;
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i4b_l4_negcomplete(sc->sc_cdp);
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}
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#endif
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/*===========================================================================*
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* ISDN INTERFACE ROUTINES
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*===========================================================================*/
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/*---------------------------------------------------------------------------*
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* this routine is called from L4 handler at connect time
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*---------------------------------------------------------------------------*/
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static void
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ibc_connect(int unit, void *cdp)
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{
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struct ibc_softc *sc = &ibc_softc[unit];
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struct ifnet *ifp = &sc->sc_p2pcom.p2p_if;
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int s;
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DBG(("ibc%d: ibc_connect\n", unit));
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s = splimp();
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sc->sc_cdp = (call_desc_t *)cdp;
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sc->sc_state = ST_CONNECTED;
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#if IBCACCT
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sc->sc_iinb = 0;
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sc->sc_ioutb = 0;
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sc->sc_inb = 0;
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sc->sc_outb = 0;
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sc->sc_linb = 0;
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sc->sc_loutb = 0;
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ifp->if_timer = IBCACCTINTVL;
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#endif
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splx(s);
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if (sc->sc_p2pcom.p2p_modem)
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(*sc->sc_p2pcom.p2p_modem)(&sc->sc_p2pcom, 1);
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/* This is a lie... PPP is just starting to negociate :-) */
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i4b_l4_negcomplete(sc->sc_cdp);
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}
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/*---------------------------------------------------------------------------*
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* this routine is called from L4 handler at disconnect time
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*---------------------------------------------------------------------------*/
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static void
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ibc_disconnect(int unit, void *cdp)
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{
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call_desc_t *cd = (call_desc_t *)cdp;
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struct ibc_softc *sc = &ibc_softc[unit];
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struct ifnet *ifp = &sc->sc_p2pcom.p2p_if;
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int s;
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DBG(("ibc%d: ibc_disconnect\n", unit));
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s = splimp();
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/* new stuff to check that the active channel is being closed */
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if (cd != sc->sc_cdp)
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{
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DBG(("ibc_disconnect: ibc%d channel%d not active\n",
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cd->driver_unit, cd->channelid));
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splx(s);
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return;
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}
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#if IBCACCT
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ifp->if_timer = 0;
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#endif
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i4b_l4_accounting(BDRV_IBC, unit, ACCT_FINAL,
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sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_outb, sc->sc_inb);
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if (sc->sc_state == ST_CONNECTED)
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{
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sc->sc_cdp = (call_desc_t *)0;
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sc->sc_state = ST_IDLE;
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if (sc->sc_p2pcom.p2p_modem)
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(*sc->sc_p2pcom.p2p_modem)(&sc->sc_p2pcom, 0);
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}
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splx(s);
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}
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/*---------------------------------------------------------------------------*
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* this routine is used to give a feedback from userland demon
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* in case of dial problems
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*---------------------------------------------------------------------------*/
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static void
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ibc_dialresponse(int unit, int status)
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{
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DBG(("ibc%d: ibc_dialresponse %d\n", unit, status));
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/* struct ibc_softc *sc = &ibc_softc[unit]; */
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}
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/*---------------------------------------------------------------------------*
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* interface up/down
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*---------------------------------------------------------------------------*/
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static void
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ibc_updown(int unit, int updown)
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{
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DBG(("ibc%d: ibc_updown %d\n", unit, updown));
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/* could probably do something useful here */
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}
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/*---------------------------------------------------------------------------*
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* this routine is called from the HSCX interrupt handler
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* when a new frame (mbuf) has been received and was put on
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* the rx queue.
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*---------------------------------------------------------------------------*/
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static void
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ibc_rx_data_rdy(int unit)
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{
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struct ibc_softc *sc = &ibc_softc[unit];
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struct ifnet *ifp = &sc->sc_p2pcom.p2p_if;
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struct mbuf *m, *m0;
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char *buf;
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int s;
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if((m = *isdn_ibc_lt[unit]->rx_mbuf) == NULL)
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return;
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microtime(&ifp->if_lastchange);
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ifp->if_ipackets++;
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/* Walk the mbuf chain */
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s = splimp();
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for (m0 = m; m != 0; m = m->m_next) {
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if (m->m_len == 0)
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continue;
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ifp->if_ibytes += m->m_len;
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#if IBCACCT
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sc->sc_inb += m->m_len;
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#endif
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buf = mtod(m, caddr_t);
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if ((*sc->sc_p2pcom.p2p_hdrinput)(
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&sc->sc_p2pcom, buf, m->m_len) >= 0)
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(*sc->sc_p2pcom.p2p_input)(&sc->sc_p2pcom, 0);
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}
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splx(s);
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m_freem(m0);
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}
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/*---------------------------------------------------------------------------*
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* this routine is called from the HSCX interrupt handler
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* when the last frame has been sent out and there is no
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* further frame (mbuf) in the tx queue.
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*---------------------------------------------------------------------------*/
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static void
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ibc_tx_queue_empty(int unit)
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{
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ibc_start(&ibc_softc[unit].sc_p2pcom.p2p_if);
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}
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/*---------------------------------------------------------------------------*
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* this routine is called from the HSCX interrupt handler
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* each time a packet is received or transmitted. It should
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* be used to implement an activity timeout mechanism.
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*---------------------------------------------------------------------------*/
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static void
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ibc_activity(int unit, int rxtx)
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{
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ibc_softc[unit].sc_cdp->last_active_time = SECOND;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* return this drivers linktab address
|
|
*---------------------------------------------------------------------------*/
|
|
drvr_link_t *
|
|
ibc_ret_linktab(int unit)
|
|
{
|
|
return(&ibc_drvr_linktab[unit]);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* setup the isdn_ibc_lt for this driver
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
ibc_set_linktab(int unit, isdn_link_t *ilt)
|
|
{
|
|
isdn_ibc_lt[unit] = ilt;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* initialize this drivers linktab
|
|
*---------------------------------------------------------------------------*/
|
|
static void
|
|
ibc_init_linktab(int unit)
|
|
{
|
|
ibc_drvr_linktab[unit].unit = unit;
|
|
ibc_drvr_linktab[unit].bch_rx_data_ready = ibc_rx_data_rdy;
|
|
ibc_drvr_linktab[unit].bch_tx_queue_empty = ibc_tx_queue_empty;
|
|
ibc_drvr_linktab[unit].bch_activity = ibc_activity;
|
|
ibc_drvr_linktab[unit].line_connected = ibc_connect;
|
|
ibc_drvr_linktab[unit].line_disconnected = ibc_disconnect;
|
|
ibc_drvr_linktab[unit].dial_response = ibc_dialresponse;
|
|
ibc_drvr_linktab[unit].updown_ind = ibc_updown;
|
|
}
|
|
|
|
/*===========================================================================*/
|
|
|
|
static int
|
|
ibc_mdmctl(pp, flag)
|
|
struct p2pcom *pp;
|
|
int flag;
|
|
{
|
|
register struct ifnet *ifp = &pp->p2p_if;
|
|
struct ibc_softc *sc = (struct ibc_softc *)&ibc_softc[ifp->if_unit];
|
|
|
|
DBG(("ibc%d: ibc_mdmctl called flags=%d\n", IFP2UNIT(ifp), flag));
|
|
|
|
if (flag == 1 && sc->sc_state == ST_IDLE) {
|
|
sc->sc_state = ST_DIALING;
|
|
i4b_l4_dialout(BDRV_IBC, IFP2UNIT(ifp));
|
|
} else if (flag == 0 && sc->sc_state != ST_IDLE) {
|
|
sc->sc_state = ST_IDLE;
|
|
i4b_l4_drvrdisc(BDRV_IBC, IFP2UNIT(ifp));
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ibc_getmdm(pp, arg)
|
|
struct p2pcom *pp;
|
|
caddr_t arg;
|
|
{
|
|
register struct ifnet *ifp = &pp->p2p_if;
|
|
struct ibc_softc *sc = (struct ibc_softc *)&ibc_softc[ifp->if_unit];
|
|
|
|
if (sc->sc_state == ST_CONNECTED)
|
|
*(int *)arg = TIOCM_CAR;
|
|
else
|
|
*(int *)arg = 0;
|
|
return 0;
|
|
|
|
DBG(("ibc%d: ibc_getmdm called ret=%d\n", IFP2UNIT(ifp), *(int *)arg));
|
|
}
|
|
#endif
|