diff options
Diffstat (limited to 'sys/netiso/clnp_timer.c')
| -rw-r--r-- | sys/netiso/clnp_timer.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/sys/netiso/clnp_timer.c b/sys/netiso/clnp_timer.c new file mode 100644 index 0000000..718d530 --- /dev/null +++ b/sys/netiso/clnp_timer.c @@ -0,0 +1,180 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. 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. + * 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. + * + * @(#)clnp_timer.c 8.1 (Berkeley) 6/10/93 + */ + +/*********************************************************** + Copyright IBM Corporation 1987 + + All Rights Reserved + +Permission to use, copy, modify, and distribute this software and its +documentation for any purpose and without fee is hereby granted, +provided that the above copyright notice appear in all copies and that +both that copyright notice and this permission notice appear in +supporting documentation, and that the name of IBM not be +used in advertising or publicity pertaining to distribution of the +software without specific, written prior permission. + +IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING +ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL +IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR +ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, +WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, +ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS +SOFTWARE. + +******************************************************************/ + +/* + * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison + */ +/* $Header: clnp_timer.c,v 4.2 88/06/29 14:59:05 hagens Exp $ */ +/* $Source: /usr/argo/sys/netiso/RCS/clnp_timer.c,v $ */ + +#include <sys/param.h> +#include <sys/mbuf.h> +#include <sys/domain.h> +#include <sys/protosw.h> +#include <sys/socket.h> +#include <sys/socketvar.h> +#include <sys/errno.h> + +#include <net/if.h> +#include <net/route.h> + +#include <netiso/iso.h> +#include <netiso/clnp.h> +#include <netiso/clnp_stat.h> +#include <netiso/argo_debug.h> + +extern struct clnp_fragl *clnp_frags; + +/* + * FUNCTION: clnp_freefrags + * + * PURPOSE: Free the resources associated with a fragment + * + * RETURNS: pointer to next fragment in list of fragments + * + * SIDE EFFECTS: + * + * NOTES: + * TODO: send ER back to source + */ +struct clnp_fragl * +clnp_freefrags(cfh) +register struct clnp_fragl *cfh; /* fragment header to delete */ +{ + struct clnp_fragl *next = cfh->cfl_next; + struct clnp_frag *cf; + + /* free any frags hanging around */ + cf = cfh->cfl_frags; + while (cf != NULL) { + struct clnp_frag *cf_next = cf->cfr_next; + INCSTAT(cns_fragdropped); + m_freem(cf->cfr_data); + cf = cf_next; + } + + /* free the copy of the header */ + INCSTAT(cns_fragdropped); + m_freem(cfh->cfl_orighdr); + + if (clnp_frags == cfh) { + clnp_frags = cfh->cfl_next; + } else { + struct clnp_fragl *scan; + + for (scan = clnp_frags; scan != NULL; scan = scan->cfl_next) { + if (scan->cfl_next == cfh) { + scan->cfl_next = cfh->cfl_next; + break; + } + } + } + + /* free the fragment header */ + m_freem(dtom(cfh)); + + return(next); +} + +/* + * FUNCTION: clnp_slowtimo + * + * PURPOSE: clnp timer processing; if the ttl expires on a + * packet on the reassembly queue, discard it. + * + * RETURNS: none + * + * SIDE EFFECTS: + * + * NOTES: + */ +clnp_slowtimo() +{ + register struct clnp_fragl *cfh = clnp_frags; + int s = splnet(); + + while (cfh != NULL) { + if (--cfh->cfl_ttl == 0) { + cfh = clnp_freefrags(cfh); + INCSTAT(cns_fragtimeout); + } else { + cfh = cfh->cfl_next; + } + } + splx(s); +} + +/* + * FUNCTION: clnp_drain + * + * PURPOSE: drain off all datagram fragments + * + * RETURNS: none + * + * SIDE EFFECTS: + * + * NOTES: + * TODO: should send back ER + */ +clnp_drain() +{ + register struct clnp_fragl *cfh = clnp_frags; + + while (cfh != NULL) + cfh = clnp_freefrags(cfh); +} |
