+++ /dev/null
-/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-/*
- * Copyright (c) University of British Columbia, 1984
- * Copyright (c) 1990, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * the Laboratory for Computation Vision and the Computer Science Department
- * of the University of British Columbia.
- *
- * 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.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
- *
- * @(#)hd_timer.c 8.1 (Berkeley) 6/10/93
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/mbuf.h>
-#include <sys/domain.h>
-#include <sys/socket.h>
-#include <sys/protosw.h>
-#include <sys/errno.h>
-#include <sys/time.h>
-#include <sys/kernel.h>
-
-#include <net/if.h>
-
-#include <netccitt/hdlc.h>
-#include <netccitt/hd_var.h>
-#include <netccitt/x25.h>
-
-/*
- * these can be patched with adb if the
- * default values are inappropriate
- */
-
-int hd_t1 = T1;
-int hd_t3 = T3;
-int hd_n2 = N2;
-
-/*
- * HDLC TIMER
- *
- * This routine is called every 500ms by the kernel. Decrement timer by this
- * amount - if expired then process the event.
- */
-
-hd_timer ()
-{
- register struct hdcb *hdp;
- register int s = splimp ();
-
- for (hdp = hdcbhead; hdp; hdp = hdp->hd_next) {
- if (hdp->hd_rrtimer && (--hdp->hd_rrtimer == 0)) {
- if (hdp->hd_lasttxnr != hdp->hd_vr)
- hd_writeinternal (hdp, RR, POLLOFF);
- }
-
- if (!(hdp->hd_timer && --hdp->hd_timer == 0))
- continue;
-
- switch (hdp->hd_state) {
- case INIT:
- case DISC_SENT:
- hd_writeinternal (hdp, DISC, POLLON);
- break;
-
- case ABM:
- if (hdp->hd_lastrxnr != hdp->hd_vs) { /* XXX */
- hdp->hd_timeouts++;
- hd_resend_iframe (hdp);
- }
- break;
-
- case WAIT_SABM:
- hd_writeinternal (hdp, FRMR, POLLOFF);
- if (++hdp->hd_retxcnt == hd_n2) {
- hdp->hd_retxcnt = 0;
- hd_writeinternal (hdp, SABM, POLLOFF);
- hdp->hd_state = WAIT_UA;
- }
- break;
-
- case DM_SENT:
- if (++hdp->hd_retxcnt == hd_n2) {
- /* Notify the packet level. */
- (void) pk_ctlinput (PRC_LINKDOWN, hdp->hd_pkp);
- hdp->hd_retxcnt = 0;
- hdp->hd_state = SABM_SENT;
- hd_writeinternal (hdp, SABM, POLLOFF);
- } else
- hd_writeinternal (hdp, DM, POLLOFF);
- break;
-
- case WAIT_UA:
- if (++hdp->hd_retxcnt == hd_n2) {
- hdp->hd_retxcnt = 0;
- hd_writeinternal (hdp, DM, POLLOFF);
- hdp->hd_state = DM_SENT;
- } else
- hd_writeinternal (hdp, SABM, POLLOFF);
- break;
-
- case SABM_SENT:
- /* Do this indefinitely. */
- hd_writeinternal (hdp, SABM, POLLON);
- break;
-
- case DISCONNECTED:
- /*
- * Poll the interface driver flags waiting
- * for the IFF_UP bit to come on.
- */
- if (hdp->hd_ifp->if_flags & IFF_UP)
- hdp->hd_state = INIT;
-
- }
- SET_TIMER (hdp);
- }
-
- splx (s);
-}
projects / apple / xnu.git / blobdiff