/* * Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * *--------------------------------------------------------------------------- * * i4b_i4bdrv.c - i4b userland interface driver * -------------------------------------------- * * $Id: i4b_i4bdrv.c,v 1.14 2002/03/24 20:35:57 martin Exp $ * * $FreeBSD$ * * last edit-date: [Fri Jan 5 11:33:47 2001] * *---------------------------------------------------------------------------*/ #include __KERNEL_RCSID(0, "$NetBSD: i4b_i4bdrv.c,v 1.14 2002/03/24 20:35:57 martin Exp $"); #include "isdn.h" #if NISDN > 0 #include #if defined(__FreeBSD__) #include #include #include #else #include #endif #include #include #include #include #include #include #include #include #include #ifdef __FreeBSD__ #if defined(__FreeBSD__) && __FreeBSD__ == 3 #include "opt_devfs.h" #endif #ifdef DEVFS #include #endif #endif /* __FreeBSD__*/ #ifdef __FreeBSD__ #include #include #include #else #include #include #include #endif #include #include #include #include #ifdef OS_USES_POLL #include #endif struct selinfo select_rd_info; static struct ifqueue i4b_rdqueue; static int openflag = 0; static int selflag = 0; static int readflag = 0; #if defined(__FreeBSD__) && __FreeBSD__ == 3 #ifdef DEVFS static void *devfs_token; #endif #endif #ifndef __FreeBSD__ #define PDEVSTATIC /* - not static - */ PDEVSTATIC void isdnattach __P((void)); PDEVSTATIC int isdnopen __P((dev_t dev, int flag, int fmt, struct proc *p)); PDEVSTATIC int isdnclose __P((dev_t dev, int flag, int fmt, struct proc *p)); PDEVSTATIC int isdnread __P((dev_t dev, struct uio *uio, int ioflag)); PDEVSTATIC int isdnioctl __P((dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)); #ifdef OS_USES_POLL PDEVSTATIC int isdnpoll __P((dev_t dev, int events, struct proc *p)); #else PDEVSTATIC int isdnselect __P((dev_t dev, int rw, struct proc *p)); #endif #endif /* #ifndef __FreeBSD__ */ #if BSD > 199306 && defined(__FreeBSD__) #define PDEVSTATIC static PDEVSTATIC d_open_t i4bopen; PDEVSTATIC d_close_t i4bclose; PDEVSTATIC d_read_t i4bread; PDEVSTATIC d_ioctl_t i4bioctl; #ifdef OS_USES_POLL PDEVSTATIC d_poll_t i4bpoll; #define POLLFIELD i4bpoll #else PDEVSTATIC d_select_t i4bselect; #define POLLFIELD i4bselect #endif #define CDEV_MAJOR 60 #if defined(__FreeBSD__) && __FreeBSD__ >= 4 static struct cdevsw i4b_cdevsw = { /* open */ i4bopen, /* close */ i4bclose, /* read */ i4bread, /* write */ nowrite, /* ioctl */ i4bioctl, /* poll */ POLLFIELD, /* mmap */ nommap, /* strategy */ nostrategy, /* name */ "i4b", /* maj */ CDEV_MAJOR, /* dump */ nodump, /* psize */ nopsize, /* flags */ 0, /* bmaj */ -1 }; #else static struct cdevsw i4b_cdevsw = { i4bopen, i4bclose, i4bread, nowrite, i4bioctl, nostop, nullreset, nodevtotty, POLLFIELD, nommap, NULL, "i4b", NULL, -1 }; #endif PDEVSTATIC void i4battach(void *); PSEUDO_SET(i4battach, i4b_i4bdrv); static void i4b_drvinit(void *unused) { #if defined(__FreeBSD__) && __FreeBSD__ >= 4 cdevsw_add(&i4b_cdevsw); #else static int i4b_devsw_installed = 0; dev_t dev; if( ! i4b_devsw_installed ) { dev = makedev(CDEV_MAJOR,0); cdevsw_add(&dev,&i4b_cdevsw,NULL); i4b_devsw_installed = 1; } #endif } SYSINIT(i4bdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,i4b_drvinit,NULL) #endif /* BSD > 199306 && defined(__FreeBSD__) */ #ifdef __bsdi__ #include int i4bmatch(struct device *parent, struct cfdata *cf, void *aux); void dummy_i4battach(struct device*, struct device *, void *); #define CDEV_MAJOR 65 static struct cfdriver i4bcd = { NULL, "i4b", i4bmatch, dummy_i4battach, DV_DULL, sizeof(struct cfdriver) }; struct devsw i4bsw = { &i4bcd, i4bopen, i4bclose, i4bread, nowrite, i4bioctl, i4bselect, nommap, nostrat, nodump, nopsize, 0, nostop }; int i4bmatch(struct device *parent, struct cfdata *cf, void *aux) { printf("i4bmatch: aux=0x%x\n", aux); return 1; } void dummy_i4battach(struct device *parent, struct device *self, void *aux) { printf("dummy_i4battach: aux=0x%x\n", aux); } #endif /* __bsdi__ */ /*---------------------------------------------------------------------------* * interface attach routine *---------------------------------------------------------------------------*/ PDEVSTATIC void #ifdef __FreeBSD__ isdnattach(void *dummy) #else isdnattach() #endif { i4b_rdqueue.ifq_maxlen = IFQ_MAXLEN; #if defined(__FreeBSD__) #if __FreeBSD__ == 3 #ifdef DEVFS devfs_token = devfs_add_devswf(&i4b_cdevsw, 0, DV_CHR, UID_ROOT, GID_WHEEL, 0600, "i4b"); #endif #else make_dev(&i4b_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, "i4b"); #endif #endif } /*---------------------------------------------------------------------------* * i4bopen - device driver open routine *---------------------------------------------------------------------------*/ PDEVSTATIC int isdnopen(dev_t dev, int flag, int fmt, struct proc *p) { int x; if(minor(dev)) return(ENXIO); if(openflag) return(EBUSY); x = splnet(); openflag = 1; i4b_l4_daemon_attached(); splx(x); return(0); } /*---------------------------------------------------------------------------* * i4bclose - device driver close routine *---------------------------------------------------------------------------*/ PDEVSTATIC int isdnclose(dev_t dev, int flag, int fmt, struct proc *p) { int x = splnet(); openflag = 0; i4b_l4_daemon_detached(); i4b_Dcleanifq(&i4b_rdqueue); splx(x); return(0); } /*---------------------------------------------------------------------------* * i4bread - device driver read routine *---------------------------------------------------------------------------*/ PDEVSTATIC int isdnread(dev_t dev, struct uio *uio, int ioflag) { struct mbuf *m; int x; int error = 0; if(minor(dev)) return(ENODEV); x = splnet(); while(IF_QEMPTY(&i4b_rdqueue)) { readflag = 1; error = tsleep((caddr_t) &i4b_rdqueue, (PZERO + 1) | PCATCH, "bird", 0); if (error != 0) { splx(x); return error; } } IF_DEQUEUE(&i4b_rdqueue, m); splx(x); if(m && m->m_len) error = uiomove(m->m_data, m->m_len, uio); else error = EIO; if(m) i4b_Dfreembuf(m); return(error); } /*---------------------------------------------------------------------------* * i4bioctl - device driver ioctl routine *---------------------------------------------------------------------------*/ PDEVSTATIC int isdnioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) { struct isdn_l3_driver *d; call_desc_t *cd; int error = 0; if(minor(dev)) return(ENODEV); switch(cmd) { /* cdid request, reserve cd and return cdid */ case I4B_CDID_REQ: { msg_cdid_req_t *mir; mir = (msg_cdid_req_t *)data; cd = reserve_cd(); mir->cdid = cd->cdid; break; } /* connect request, dial out to remote */ case I4B_CONNECT_REQ: { msg_connect_req_t *mcr; mcr = (msg_connect_req_t *)data; /* setup ptr */ if((cd = cd_by_cdid(mcr->cdid)) == NULL)/* get cd */ { NDBGL4(L4_ERR, "I4B_CONNECT_REQ ioctl, cdid not found!"); error = EINVAL; break; } d = isdn_find_l3_by_bri(cd->bri); /* prevent dialling on leased lines */ if(d->protocol == PROTOCOL_D64S) { SET_CAUSE_TYPE(cd->cause_in, CAUSET_I4B); SET_CAUSE_VAL(cd->cause_in, CAUSE_I4B_LLDIAL); i4b_l4_disconnect_ind(cd); freecd_by_cd(cd); break; } cd->bri = mcr->controller; /* fill cd */ cd->bprot = mcr->bprot; cd->bchan_driver_index = mcr->driver; cd->bchan_driver_unit = mcr->driver_unit; cd->cr = get_rand_cr(cd->bri); cd->shorthold_data.shorthold_algorithm = mcr->shorthold_data.shorthold_algorithm; cd->shorthold_data.unitlen_time = mcr->shorthold_data.unitlen_time; cd->shorthold_data.idle_time = mcr->shorthold_data.idle_time; cd->shorthold_data.earlyhup_time = mcr->shorthold_data.earlyhup_time; cd->last_aocd_time = 0; if(mcr->unitlen_method == ULEN_METHOD_DYNAMIC) cd->aocd_flag = 1; else cd->aocd_flag = 0; cd->cunits = 0; cd->max_idle_time = 0; /* this is outgoing */ cd->dir = DIR_OUTGOING; NDBGL4(L4_TIMO, "I4B_CONNECT_REQ times, algorithm=%ld unitlen=%ld idle=%ld earlyhup=%ld", (long)cd->shorthold_data.shorthold_algorithm, (long)cd->shorthold_data.unitlen_time, (long)cd->shorthold_data.idle_time, (long)cd->shorthold_data.earlyhup_time); strcpy(cd->dst_telno, mcr->dst_telno); strcpy(cd->src_telno, mcr->src_telno); cd->display[0] = '\0'; SET_CAUSE_TYPE(cd->cause_in, CAUSET_I4B); SET_CAUSE_VAL(cd->cause_in, CAUSE_I4B_NORMAL); switch(mcr->channel) { case CHAN_B1: case CHAN_B2: if(d->bch_state[mcr->channel] != BCH_ST_FREE) SET_CAUSE_VAL(cd->cause_in, CAUSE_I4B_NOCHAN); break; case CHAN_ANY: if((d->bch_state[CHAN_B1] != BCH_ST_FREE) && (d->bch_state[CHAN_B2] != BCH_ST_FREE)) SET_CAUSE_VAL(cd->cause_in, CAUSE_I4B_NOCHAN); break; default: SET_CAUSE_VAL(cd->cause_in, CAUSE_I4B_NOCHAN); break; } cd->channelid = mcr->channel; cd->isdntxdelay = mcr->txdelay; if((GET_CAUSE_VAL(cd->cause_in)) != CAUSE_I4B_NORMAL) { i4b_l4_disconnect_ind(cd); freecd_by_cd(cd); } else { d->l3driver->N_CONNECT_REQUEST(mcr->cdid); } break; } /* connect response, accept/reject/ignore incoming call */ case I4B_CONNECT_RESP: { msg_connect_resp_t *mcrsp; mcrsp = (msg_connect_resp_t *)data; if((cd = cd_by_cdid(mcrsp->cdid)) == NULL)/* get cd */ { NDBGL4(L4_ERR, "I4B_CONNECT_RESP ioctl, cdid not found!"); error = EINVAL; break; } T400_stop(cd); cd->bchan_driver_index = mcrsp->driver; cd->bchan_driver_unit = mcrsp->driver_unit; cd->max_idle_time = mcrsp->max_idle_time; cd->shorthold_data.shorthold_algorithm = SHA_FIXU; cd->shorthold_data.unitlen_time = 0; /* this is incoming */ cd->shorthold_data.idle_time = 0; cd->shorthold_data.earlyhup_time = 0; cd->isdntxdelay = mcrsp->txdelay; NDBGL4(L4_TIMO, "I4B_CONNECT_RESP max_idle_time set to %ld seconds", (long)cd->max_idle_time); d = isdn_find_l3_by_bri(cd->bri); d->l3driver->N_CONNECT_RESPONSE(mcrsp->cdid, mcrsp->response, mcrsp->cause); break; } /* disconnect request, actively terminate connection */ case I4B_DISCONNECT_REQ: { msg_discon_req_t *mdr; mdr = (msg_discon_req_t *)data; if((cd = cd_by_cdid(mdr->cdid)) == NULL)/* get cd */ { NDBGL4(L4_ERR, "I4B_DISCONNECT_REQ ioctl, cdid not found!"); error = EINVAL; break; } /* preset causes with our cause */ cd->cause_in = cd->cause_out = mdr->cause; d = isdn_find_l3_by_bri(cd->bri); d->l3driver->N_DISCONNECT_REQUEST(mdr->cdid, mdr->cause); break; } /* controller info request */ case I4B_CTRL_INFO_REQ: { msg_ctrl_info_req_t *mcir; struct isdn_l3_driver *d; int bri; mcir = (msg_ctrl_info_req_t *)data; bri = mcir->controller; memset(mcir, 0, sizeof(msg_ctrl_info_req_t)); mcir->controller = bri; mcir->ncontroller = isdn_count_bri(&mcir->maxbri); d = isdn_find_l3_by_bri(bri); if (d != NULL) { mcir->tei = d->tei; strncpy(mcir->devname, d->devname, sizeof(mcir->devname)-1); strncpy(mcir->cardname, d->card_name, sizeof(mcir->cardname)-1); } else { error = ENODEV; } break; } /* dial response */ case I4B_DIALOUT_RESP: { const struct isdn_l4_driver_functions *drv; msg_dialout_resp_t *mdrsp; void * l4_softc; mdrsp = (msg_dialout_resp_t *)data; drv = isdn_l4_get_driver(mdrsp->driver, mdrsp->driver_unit); if(drv != NULL) { l4_softc = (*drv->get_softc)(mdrsp->driver_unit); (*drv->dial_response)(l4_softc, mdrsp->stat, mdrsp->cause); } break; } /* update timeout value */ case I4B_TIMEOUT_UPD: { msg_timeout_upd_t *mtu; int x; mtu = (msg_timeout_upd_t *)data; NDBGL4(L4_TIMO, "I4B_TIMEOUT_UPD ioctl, alg %d, unit %d, idle %d, early %d!", mtu->shorthold_data.shorthold_algorithm, mtu->shorthold_data.unitlen_time, mtu->shorthold_data.idle_time, mtu->shorthold_data.earlyhup_time); if((cd = cd_by_cdid(mtu->cdid)) == NULL)/* get cd */ { NDBGL4(L4_ERR, "I4B_TIMEOUT_UPD ioctl, cdid not found!"); error = EINVAL; break; } switch( mtu->shorthold_data.shorthold_algorithm ) { case SHA_FIXU: /* * For this algorithm unitlen_time, * idle_time and earlyhup_time are used. */ if(!(mtu->shorthold_data.unitlen_time >= 0 && mtu->shorthold_data.idle_time >= 0 && mtu->shorthold_data.earlyhup_time >= 0)) { NDBGL4(L4_ERR, "I4B_TIMEOUT_UPD ioctl, invalid args for fix unit algorithm!"); error = EINVAL; } break; case SHA_VARU: /* * For this algorithm unitlen_time and * idle_time are used. both must be * positive integers. earlyhup_time is * not used and must be 0. */ if(!(mtu->shorthold_data.unitlen_time > 0 && mtu->shorthold_data.idle_time >= 0 && mtu->shorthold_data.earlyhup_time == 0)) { NDBGL4(L4_ERR, "I4B_TIMEOUT_UPD ioctl, invalid args for var unit algorithm!"); error = EINVAL; } break; default: NDBGL4(L4_ERR, "I4B_TIMEOUT_UPD ioctl, invalid algorithm!"); error = EINVAL; break; } /* * any error set above requires us to break * out of the outer switch */ if(error != 0) break; x = splnet(); cd->shorthold_data.shorthold_algorithm = mtu->shorthold_data.shorthold_algorithm; cd->shorthold_data.unitlen_time = mtu->shorthold_data.unitlen_time; cd->shorthold_data.idle_time = mtu->shorthold_data.idle_time; cd->shorthold_data.earlyhup_time = mtu->shorthold_data.earlyhup_time; splx(x); break; } /* soft enable/disable interface */ case I4B_UPDOWN_IND: { msg_updown_ind_t *mui; const struct isdn_l4_driver_functions *drv; void * l4_softc; mui = (msg_updown_ind_t *)data; drv = isdn_l4_get_driver(mui->driver, mui->driver_unit); if (drv) { l4_softc = drv->get_softc(mui->driver_unit); (*drv->updown_ind)(l4_softc, mui->updown); } break; } /* send ALERT request */ case I4B_ALERT_REQ: { msg_alert_req_t *mar; mar = (msg_alert_req_t *)data; if((cd = cd_by_cdid(mar->cdid)) == NULL) { NDBGL4(L4_ERR, "I4B_ALERT_REQ ioctl, cdid not found!"); error = EINVAL; break; } T400_stop(cd); d = isdn_find_l3_by_bri(cd->bri); d->l3driver->N_ALERT_REQUEST(mar->cdid); break; } /* version/release number request */ case I4B_VR_REQ: { msg_vr_req_t *mvr; mvr = (msg_vr_req_t *)data; mvr->version = VERSION; mvr->release = REL; mvr->step = STEP; break; } /* set D-channel protocol for a controller */ case I4B_PROT_IND: { msg_prot_ind_t *mpi; mpi = (msg_prot_ind_t *)data; d = isdn_find_l3_by_bri(mpi->controller); d->protocol = mpi->protocol; break; } case I4B_L4DRIVER_LOOKUP: { msg_l4driver_lookup_t *lookup = (msg_l4driver_lookup_t*)data; lookup->name[L4DRIVER_NAME_SIZ-1] = 0; lookup->driver_id = isdn_l4_find_driverid(lookup->name); break; } /* Download request */ case I4B_CTRL_DOWNLOAD: { struct isdn_dr_prot *prots = NULL, *prots2 = NULL; struct isdn_download_request *r = (struct isdn_download_request*)data; int i; d = isdn_find_l3_by_bri(r->controller); if (d == NULL) { error = ENODEV; goto download_done; } if(d->l3driver->N_DOWNLOAD == NULL) { error = ENODEV; goto download_done; } prots = malloc(r->numprotos * sizeof(struct isdn_dr_prot), M_DEVBUF, M_WAITOK); prots2 = malloc(r->numprotos * sizeof(struct isdn_dr_prot), M_DEVBUF, M_WAITOK); if(!prots || !prots2) { error = ENOMEM; goto download_done; } copyin(r->protocols, prots, r->numprotos * sizeof(struct isdn_dr_prot)); for(i = 0; i < r->numprotos; i++) { prots2[i].microcode = malloc(prots[i].bytecount, M_DEVBUF, M_WAITOK); copyin(prots[i].microcode, prots2[i].microcode, prots[i].bytecount); prots2[i].bytecount = prots[i].bytecount; } error = d->l3driver->N_DOWNLOAD( d->l1_token, r->numprotos, prots2); download_done: if(prots2) { for(i = 0; i < r->numprotos; i++) { if(prots2[i].microcode) { free(prots2[i].microcode, M_DEVBUF); } } free(prots2, M_DEVBUF); } if(prots) { free(prots, M_DEVBUF); } break; } /* Diagnostic request */ case I4B_ACTIVE_DIAGNOSTIC: { struct isdn_diagnostic_request req, *r = (struct isdn_diagnostic_request*)data; req.in_param = req.out_param = NULL; d = isdn_find_l3_by_bri(r->controller); if (d == NULL) { error = ENODEV; goto diag_done; } if (d->l3driver->N_DIAGNOSTICS == NULL) { error = ENODEV; goto diag_done; } memcpy(&req, r, sizeof(req)); if(req.in_param_len) { /* XXX arbitrary limit */ if (req.in_param_len > I4B_ACTIVE_DIAGNOSTIC_MAXPARAMLEN) { error = EINVAL; goto diag_done; } req.in_param = malloc(r->in_param_len, M_DEVBUF, M_WAITOK); if(!req.in_param) { error = ENOMEM; goto diag_done; } error = copyin(r->in_param, req.in_param, req.in_param_len); if (error) goto diag_done; } if(req.out_param_len) { req.out_param = malloc(r->out_param_len, M_DEVBUF, M_WAITOK); if(!req.out_param) { error = ENOMEM; goto diag_done; } } error = d->l3driver->N_DIAGNOSTICS(d->l1_token, &req); if(!error && req.out_param_len) error = copyout(req.out_param, r->out_param, req.out_param_len); diag_done: if(req.in_param) free(req.in_param, M_DEVBUF); if(req.out_param) free(req.out_param, M_DEVBUF); break; } /* default */ default: error = ENOTTY; break; } return(error); } #ifdef OS_USES_SELECT /*---------------------------------------------------------------------------* * i4bselect - device driver select routine *---------------------------------------------------------------------------*/ PDEVSTATIC int i4bselect(dev_t dev, int rw, struct proc *p) { int x; if(minor(dev)) return(ENODEV); switch(rw) { case FREAD: if(!IF_QEMPTY(&i4b_rdqueue)) return(1); x = splnet(); selrecord(p, &select_rd_info); selflag = 1; splx(x); return(0); break; case FWRITE: return(1); break; } return(0); } #else /* OS_USES_SELECT */ /*---------------------------------------------------------------------------* * i4bpoll - device driver poll routine *---------------------------------------------------------------------------*/ PDEVSTATIC int isdnpoll(dev_t dev, int events, struct proc *p) { int x; if(minor(dev)) return(ENODEV); if((events & POLLIN) || (events & POLLRDNORM)) { if(!IF_QEMPTY(&i4b_rdqueue)) return(1); x = splnet(); selrecord(p, &select_rd_info); selflag = 1; splx(x); return(0); } else if((events & POLLOUT) || (events & POLLWRNORM)) { return(1); } return(0); } #endif /* OS_USES_SELECT */ /*---------------------------------------------------------------------------* * i4bputqueue - put message into queue to userland *---------------------------------------------------------------------------*/ void i4bputqueue(struct mbuf *m) { int x; if(!openflag) { i4b_Dfreembuf(m); return; } x = splnet(); if(IF_QFULL(&i4b_rdqueue)) { struct mbuf *m1; IF_DEQUEUE(&i4b_rdqueue, m1); i4b_Dfreembuf(m1); NDBGL4(L4_ERR, "ERROR, queue full, removing entry!"); } IF_ENQUEUE(&i4b_rdqueue, m); splx(x); if(readflag) { readflag = 0; wakeup((caddr_t) &i4b_rdqueue); } if(selflag) { selflag = 0; selwakeup(&select_rd_info); } } /*---------------------------------------------------------------------------* * i4bputqueue_hipri - put message into front of queue to userland *---------------------------------------------------------------------------*/ void i4bputqueue_hipri(struct mbuf *m) { int x; if(!openflag) { i4b_Dfreembuf(m); return; } x = splnet(); if(IF_QFULL(&i4b_rdqueue)) { struct mbuf *m1; IF_DEQUEUE(&i4b_rdqueue, m1); i4b_Dfreembuf(m1); NDBGL4(L4_ERR, "ERROR, queue full, removing entry!"); } IF_PREPEND(&i4b_rdqueue, m); splx(x); if(readflag) { readflag = 0; wakeup((caddr_t) &i4b_rdqueue); } if(selflag) { selflag = 0; selwakeup(&select_rd_info); } } #endif /* NISDN > 0 */