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1.1 root 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: }
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