669 lines
19 KiB
C
669 lines
19 KiB
C
/*
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* Copyright (c) 1997 Joerg Wunsch. All rights reserved.
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*
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* Copyright (c) 1997, 2002 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_isppp.c - isdn4bsd kernel SyncPPP driver
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* --------------------------------------------
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*
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* Uses Serge Vakulenko's sppp backend (originally contributed with
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* the "cx" driver for Cronyx's HDLC-in-hardware device). This driver
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* is only the glue between sppp and i4b.
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*
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* $FreeBSD$
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*
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* last edit-date: [Sat Mar 9 14:09:27 2002]
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*
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*---------------------------------------------------------------------------*/
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#include "i4bisppp.h"
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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/sockio.h>
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#include <sys/kernel.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_sppp.h>
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#include <sys/time.h>
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#include <net/bpf.h>
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#include <machine/i4b_ioctl.h>
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#include <machine/i4b_debug.h>
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#include <i4b/include/i4b_global.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 ISPPP_FMT "isp%d: "
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#define ISPPP_ARG(sc) ((sc)->sc_if.if_unit)
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#define PDEVSTATIC static
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#define IFP2UNIT(ifp) (ifp)->if_unit
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# define CALLOUT_INIT(chan) callout_handle_init(chan)
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# define TIMEOUT(fun, arg, chan, tick) chan = timeout(fun, arg, tick)
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# define UNTIMEOUT(fun, arg, chan) untimeout(fun, arg, chan)
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# define IOCTL_CMD_T u_long
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PDEVSTATIC void i4bispppattach(void *);
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PSEUDO_SET(i4bispppattach, i4b_isppp);
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#define I4BISPPPACCT 1 /* enable accounting messages */
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#define I4BISPPPACCTINTVL 2 /* accounting msg interval in secs */
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#define I4BISPPPDISCDEBUG 1
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#define PPP_HDRLEN 4 /* 4 octetts PPP header length */
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struct i4bisppp_softc {
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/*
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* struct sppp starts with a struct ifnet, but we gotta allocate
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* more space for it. NB: do not relocate this union, it must
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* be first in isppp_softc. The tls and tlf hooks below want to
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* convert a ``struct sppp *'' into a ``struct isppp_softc *''.
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*/
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union {
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struct ifnet scu_if;
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struct sppp scu_sp;
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} sc_if_un;
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#define sc_if sc_if_un.scu_if
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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 I4BISPPPACCT
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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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struct callout_handle sc_ch;
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} i4bisppp_softc[NI4BISPPP];
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static void i4bisppp_init_linktab(int unit);
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static int i4bisppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data);
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#if 0
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static void i4bisppp_send(struct ifnet *ifp);
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#endif
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static void i4bisppp_start(struct ifnet *ifp);
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#if 0 /* never used ??? */
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static void i4bisppp_timeout(void *cookie);
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#endif
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static void i4bisppp_tls(struct sppp *sp);
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static void i4bisppp_tlf(struct sppp *sp);
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static void i4bisppp_state_changed(struct sppp *sp, int new_state);
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static void i4bisppp_negotiation_complete(struct sppp *sp);
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static void i4bisppp_watchdog(struct ifnet *ifp);
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time_t i4bisppp_idletime(int unit);
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/* initialized by L4 */
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static drvr_link_t i4bisppp_drvr_linktab[NI4BISPPP];
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static isdn_link_t *isdn_linktab[NI4BISPPP];
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enum i4bisppp_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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/*===========================================================================*
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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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PDEVSTATIC void
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i4bispppattach(void *dummy)
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{
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struct i4bisppp_softc *sc = i4bisppp_softc;
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int i;
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#ifdef SPPP_VJ
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printf("i4bisppp: %d ISDN SyncPPP device(s) attached (VJ header compression)\n", NI4BISPPP);
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#else
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printf("i4bisppp: %d ISDN SyncPPP device(s) attached\n", NI4BISPPP);
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#endif
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for(i = 0; i < NI4BISPPP; sc++, i++) {
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i4bisppp_init_linktab(i);
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sc->sc_if.if_softc = sc;
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sc->sc_if.if_name = "isp";
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sc->sc_if.if_unit = i;
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sc->sc_if.if_mtu = PP_MTU;
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sc->sc_if.if_flags = IFF_SIMPLEX | IFF_POINTOPOINT;
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sc->sc_if.if_type = IFT_ISDNBASIC;
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sc->sc_state = ST_IDLE;
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sc->sc_if.if_ioctl = i4bisppp_ioctl;
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/* actually initialized by sppp_attach() */
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/* sc->sc_if.if_output = sppp_output; */
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sc->sc_if.if_start = i4bisppp_start;
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sc->sc_if.if_hdrlen = 0;
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sc->sc_if.if_addrlen = 0;
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sc->sc_if.if_snd.ifq_maxlen = IFQ_MAXLEN;
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sc->sc_if.if_ipackets = 0;
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sc->sc_if.if_ierrors = 0;
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sc->sc_if.if_opackets = 0;
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sc->sc_if.if_oerrors = 0;
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sc->sc_if.if_collisions = 0;
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sc->sc_if.if_ibytes = 0;
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sc->sc_if.if_obytes = 0;
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sc->sc_if.if_imcasts = 0;
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sc->sc_if.if_omcasts = 0;
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sc->sc_if.if_iqdrops = 0;
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sc->sc_if.if_noproto = 0;
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#if I4BISPPPACCT
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sc->sc_if.if_timer = 0;
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sc->sc_if.if_watchdog = i4bisppp_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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sc->sc_if_un.scu_sp.pp_tls = i4bisppp_tls;
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sc->sc_if_un.scu_sp.pp_tlf = i4bisppp_tlf;
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sc->sc_if_un.scu_sp.pp_con = i4bisppp_negotiation_complete;
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sc->sc_if_un.scu_sp.pp_chg = i4bisppp_state_changed;
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sppp_attach(&sc->sc_if);
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#if 0 /* ??? -hm */
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ether_ifattach(&sc->sc_if, 0);
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#else
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if_attach(&sc->sc_if);
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#endif
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CALLOUT_INIT(&sc->sc_ch);
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bpfattach(&sc->sc_if, DLT_PPP, PPP_HDRLEN);
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}
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}
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/*---------------------------------------------------------------------------*
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* process ioctl
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*---------------------------------------------------------------------------*/
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static int
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i4bisppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data)
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{
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struct i4bisppp_softc *sc = ifp->if_softc;
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#if 0
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struct sppp *sp = (struct sppp *)sc;
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struct ifaddr *ifa = (struct ifaddr *) data;
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struct ifreq *ifr = (struct ifreq *) data;
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#endif
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int error;
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error = sppp_ioctl(&sc->sc_if, cmd, data);
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if (error)
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return error;
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switch(cmd) {
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case SIOCSIFFLAGS:
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#if 0 /* never used ??? */
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x = splimp();
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if ((ifp->if_flags & IFF_UP) == 0)
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UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
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splx(x);
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#endif
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break;
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}
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return 0;
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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 void
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i4bisppp_start(struct ifnet *ifp)
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{
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struct i4bisppp_softc *sc = ifp->if_softc;
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struct mbuf *m;
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/* int s; */
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int unit = IFP2UNIT(ifp);
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if (sppp_isempty(ifp))
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return;
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if(sc->sc_state != ST_CONNECTED)
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return;
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/*
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* s = splimp();
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* ifp->if_flags |= IFF_OACTIVE; // - need to clear this somewhere
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* splx(s);
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*/
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while ((m = sppp_dequeue(&sc->sc_if)) != NULL)
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{
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if (ifp->if_bpf)
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bpf_mtap(ifp, m);
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microtime(&ifp->if_lastchange);
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IF_LOCK(isdn_linktab[unit]->tx_queue);
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if(_IF_QFULL(isdn_linktab[unit]->tx_queue))
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{
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NDBGL4(L4_ISPDBG, "isp%d, tx queue full!", unit);
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m_freem(m);
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}
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else
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{
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#if 0
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sc->sc_if.if_obytes += m->m_pkthdr.len;
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#endif
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sc->sc_outb += m->m_pkthdr.len;
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sc->sc_if.if_opackets++;
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_IF_ENQUEUE(isdn_linktab[unit]->tx_queue, m);
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}
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IF_UNLOCK(isdn_linktab[unit]->tx_queue);
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}
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isdn_linktab[unit]->bch_tx_start(isdn_linktab[unit]->unit,
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isdn_linktab[unit]->channel);
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}
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#ifdef I4BISPPPACCT
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/*---------------------------------------------------------------------------*
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* watchdog routine
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*---------------------------------------------------------------------------*/
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static void
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i4bisppp_watchdog(struct ifnet *ifp)
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{
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struct i4bisppp_softc *sc = ifp->if_softc;
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int unit = IFP2UNIT(ifp);
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bchan_statistics_t bs;
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(*isdn_linktab[unit]->bch_stat)
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(isdn_linktab[unit]->unit, isdn_linktab[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)/I4BISPPPACCTINTVL;
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int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BISPPPACCTINTVL;
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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_ISPPP, 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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sc->sc_if.if_timer = I4BISPPPACCTINTVL;
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#if 0 /* old stuff, keep it around */
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printf(ISPPP_FMT "transmit timeout\n", ISPPP_ARG(sc));
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i4bisppp_start(ifp);
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#endif
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}
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#endif /* I4BISPPPACCT */
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/*
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*===========================================================================*
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* SyncPPP layer interface routines
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*===========================================================================*
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*/
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#if 0 /* never used ??? */
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/*---------------------------------------------------------------------------*
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* just an alias for i4bisppp_tls, but of type timeout_t
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*---------------------------------------------------------------------------*/
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static void
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i4bisppp_timeout(void *cookie)
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{
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i4bisppp_tls((struct sppp *)cookie);
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}
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#endif
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/*---------------------------------------------------------------------------*
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* PPP this-layer-started action
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*---------------------------------------------------------------------------*
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*/
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static void
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i4bisppp_tls(struct sppp *sp)
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{
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struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
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struct ifnet *ifp = (struct ifnet *)sp;
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if(sc->sc_state == ST_CONNECTED)
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return;
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i4b_l4_dialout(BDRV_ISPPP, IFP2UNIT(ifp));
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}
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/*---------------------------------------------------------------------------*
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* PPP this-layer-finished action
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*---------------------------------------------------------------------------*
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*/
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static void
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i4bisppp_tlf(struct sppp *sp)
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{
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struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
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/* call_desc_t *cd = sc->sc_cdp; */
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struct ifnet *ifp = (struct ifnet *)sp;
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if(sc->sc_state != ST_CONNECTED)
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return;
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#if 0 /* never used ??? */
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UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
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#endif
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i4b_l4_drvrdisc(BDRV_ISPPP, IFP2UNIT(ifp));
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}
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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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i4bisppp_state_changed(struct sppp *sp, int new_state)
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{
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struct i4bisppp_softc *sc = (struct i4bisppp_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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i4bisppp_negotiation_complete(struct sppp *sp)
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{
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struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
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i4b_l4_negcomplete(sc->sc_cdp);
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}
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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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i4bisppp_connect(int unit, void *cdp)
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{
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struct i4bisppp_softc *sc = &i4bisppp_softc[unit];
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struct sppp *sp = &sc->sc_if_un.scu_sp;
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int 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 I4BISPPPACCT
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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_if.if_timer = I4BISPPPACCTINTVL;
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#endif
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#if 0 /* never used ??? */
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UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
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#endif
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sp->pp_up(sp); /* tell PPP we are ready */
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sp->pp_last_sent = sp->pp_last_recv = SECOND;
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splx(s);
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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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i4bisppp_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 i4bisppp_softc *sc = &i4bisppp_softc[unit];
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struct sppp *sp = &sc->sc_if_un.scu_sp;
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int 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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{
|
|
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 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, cause_t cause)
|
|
{
|
|
struct i4bisppp_softc *sc = &i4bisppp_softc[unit];
|
|
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* 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
|
|
|
|
if(sc->sc_if.if_bpf)
|
|
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;
|
|
}
|
|
|
|
/*===========================================================================*/
|