[apple/xnu.git] / bsd / netiso / clnp_timer.c

/*
 * 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) 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
 */

#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);
}
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/*-
	23	* Copyright (c) 1991, 1993
	24	* The Regents of the University of California. All rights reserved.
	25	*
	26	* Redistribution and use in source and binary forms, with or without
	27	* modification, are permitted provided that the following conditions
	28	* are met:
	29	* 1. Redistributions of source code must retain the above copyright
	30	* notice, this list of conditions and the following disclaimer.
	31	* 2. Redistributions in binary form must reproduce the above copyright
	32	* notice, this list of conditions and the following disclaimer in the
	33	* documentation and/or other materials provided with the distribution.
	34	* 3. All advertising materials mentioning features or use of this software
	35	* must display the following acknowledgement:
	36	* This product includes software developed by the University of
	37	* California, Berkeley and its contributors.
	38	* 4. Neither the name of the University nor the names of its contributors
	39	* may be used to endorse or promote products derived from this software
	40	* without specific prior written permission.
	41	*
	42	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	43	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	44	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	45	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	46	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	47	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	48	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	49	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	50	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	51	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	52	* SUCH DAMAGE.
	53	*
	54	* @(#)clnp_timer.c 8.1 (Berkeley) 6/10/93
	55	*/
	56
	57	/***********************************************************
	58	Copyright IBM Corporation 1987
	59
	60	All Rights Reserved
	61
	62	Permission to use, copy, modify, and distribute this software and its
	63	documentation for any purpose and without fee is hereby granted,
	64	provided that the above copyright notice appear in all copies and that
65	both that copyright notice and this permission notice appear in
66	supporting documentation, and that the name of IBM not be
67	used in advertising or publicity pertaining to distribution of the
68	software without specific, written prior permission.
69
70	IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
71	ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
72	IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
73	ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
74	WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
75	ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
76	SOFTWARE.
77
78	******************************************************************/
79
80	/*
81	* ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
82	*/
83
84	#include <sys/param.h>
85	#include <sys/mbuf.h>
86	#include <sys/domain.h>
87	#include <sys/protosw.h>
88	#include <sys/socket.h>
89	#include <sys/socketvar.h>
90	#include <sys/errno.h>
91
92	#include <net/if.h>
93	#include <net/route.h>
94
95	#include <netiso/iso.h>
96	#include <netiso/clnp.h>
97	#include <netiso/clnp_stat.h>
98	#include <netiso/argo_debug.h>
99
100	extern struct clnp_fragl *clnp_frags;
101
102	/*
103	* FUNCTION: clnp_freefrags
104	*
105	* PURPOSE: Free the resources associated with a fragment
106	*
107	* RETURNS: pointer to next fragment in list of fragments
108	*
109	* SIDE EFFECTS:
110	*
111	* NOTES:
112	* TODO: send ER back to source
113	*/
114	struct clnp_fragl *
115	clnp_freefrags(cfh)
116	register struct clnp_fragl cfh; / fragment header to delete */
117	{
118	struct clnp_fragl *next = cfh->cfl_next;
119	struct clnp_frag *cf;
120
121	/* free any frags hanging around */
122	cf = cfh->cfl_frags;
123	while (cf != NULL) {
124	struct clnp_frag *cf_next = cf->cfr_next;
125	INCSTAT(cns_fragdropped);
126	m_freem(cf->cfr_data);
127	cf = cf_next;
128	}
129
130	/* free the copy of the header */
131	INCSTAT(cns_fragdropped);
132	m_freem(cfh->cfl_orighdr);
133
134	if (clnp_frags == cfh) {
135	clnp_frags = cfh->cfl_next;
136	} else {
137	struct clnp_fragl *scan;
138
139	for (scan = clnp_frags; scan != NULL; scan = scan->cfl_next) {
140	if (scan->cfl_next == cfh) {
141	scan->cfl_next = cfh->cfl_next;
142	break;
143	}
144	}
145	}
146
147	/* free the fragment header */
148	m_freem(dtom(cfh));
149
150	return(next);
151	}
152
153	/*
154	* FUNCTION: clnp_slowtimo
155	*
156	* PURPOSE: clnp timer processing; if the ttl expires on a
157	* packet on the reassembly queue, discard it.
158	*
159	* RETURNS: none
160	*
161	* SIDE EFFECTS:
162	*
163	* NOTES:
164	*/
165	clnp_slowtimo()
166	{
167	register struct clnp_fragl *cfh = clnp_frags;
168	int s = splnet();
169
170	while (cfh != NULL) {
171	if (--cfh->cfl_ttl == 0) {
172	cfh = clnp_freefrags(cfh);
173	INCSTAT(cns_fragtimeout);
174	} else {
175	cfh = cfh->cfl_next;
176	}
177	}
178	splx(s);
179	}
180
181	/*
182	* FUNCTION: clnp_drain
183	*
184	* PURPOSE: drain off all datagram fragments
185	*
186	* RETURNS: none
187	*
188	* SIDE EFFECTS:
189	*
190	* NOTES:
191	* TODO: should send back ER
192	*/
193	clnp_drain()
194	{
195	register struct clnp_fragl *cfh = clnp_frags;
196
197	while (cfh != NULL)
198	cfh = clnp_freefrags(cfh);
199	}