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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: /*-
26: * Copyright (c) 1991, 1993
27: * The Regents of the University of California. All rights reserved.
28: *
29: * Redistribution and use in source and binary forms, with or without
30: * modification, are permitted provided that the following conditions
31: * are met:
32: * 1. Redistributions of source code must retain the above copyright
33: * notice, this list of conditions and the following disclaimer.
34: * 2. Redistributions in binary form must reproduce the above copyright
35: * notice, this list of conditions and the following disclaimer in the
36: * documentation and/or other materials provided with the distribution.
37: * 3. All advertising materials mentioning features or use of this software
38: * must display the following acknowledgement:
39: * This product includes software developed by the University of
40: * California, Berkeley and its contributors.
41: * 4. Neither the name of the University nor the names of its contributors
42: * may be used to endorse or promote products derived from this software
43: * without specific prior written permission.
44: *
45: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
46: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
48: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
49: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
50: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
51: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
53: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
54: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
55: * SUCH DAMAGE.
56: *
57: * @(#)clnp_timer.c 8.1 (Berkeley) 6/10/93
58: */
59:
60: /***********************************************************
61: Copyright IBM Corporation 1987
62:
63: All Rights Reserved
64:
65: Permission to use, copy, modify, and distribute this software and its
66: documentation for any purpose and without fee is hereby granted,
67: provided that the above copyright notice appear in all copies and that
68: both that copyright notice and this permission notice appear in
69: supporting documentation, and that the name of IBM not be
70: used in advertising or publicity pertaining to distribution of the
71: software without specific, written prior permission.
72:
73: IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
74: ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
75: IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
76: ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
77: WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
78: ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
79: SOFTWARE.
80:
81: ******************************************************************/
82:
83: /*
84: * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
85: */
86:
87: #include <sys/param.h>
88: #include <sys/mbuf.h>
89: #include <sys/domain.h>
90: #include <sys/protosw.h>
91: #include <sys/socket.h>
92: #include <sys/socketvar.h>
93: #include <sys/errno.h>
94:
95: #include <net/if.h>
96: #include <net/route.h>
97:
98: #include <netiso/iso.h>
99: #include <netiso/clnp.h>
100: #include <netiso/clnp_stat.h>
101: #include <netiso/argo_debug.h>
102:
103: extern struct clnp_fragl *clnp_frags;
104:
105: /*
106: * FUNCTION: clnp_freefrags
107: *
108: * PURPOSE: Free the resources associated with a fragment
109: *
110: * RETURNS: pointer to next fragment in list of fragments
111: *
112: * SIDE EFFECTS:
113: *
114: * NOTES:
115: * TODO: send ER back to source
116: */
117: struct clnp_fragl *
118: clnp_freefrags(cfh)
119: register struct clnp_fragl *cfh; /* fragment header to delete */
120: {
121: struct clnp_fragl *next = cfh->cfl_next;
122: struct clnp_frag *cf;
123:
124: /* free any frags hanging around */
125: cf = cfh->cfl_frags;
126: while (cf != NULL) {
127: struct clnp_frag *cf_next = cf->cfr_next;
128: INCSTAT(cns_fragdropped);
129: m_freem(cf->cfr_data);
130: cf = cf_next;
131: }
132:
133: /* free the copy of the header */
134: INCSTAT(cns_fragdropped);
135: m_freem(cfh->cfl_orighdr);
136:
137: if (clnp_frags == cfh) {
138: clnp_frags = cfh->cfl_next;
139: } else {
140: struct clnp_fragl *scan;
141:
142: for (scan = clnp_frags; scan != NULL; scan = scan->cfl_next) {
143: if (scan->cfl_next == cfh) {
144: scan->cfl_next = cfh->cfl_next;
145: break;
146: }
147: }
148: }
149:
150: /* free the fragment header */
151: m_freem(dtom(cfh));
152:
153: return(next);
154: }
155:
156: /*
157: * FUNCTION: clnp_slowtimo
158: *
159: * PURPOSE: clnp timer processing; if the ttl expires on a
160: * packet on the reassembly queue, discard it.
161: *
162: * RETURNS: none
163: *
164: * SIDE EFFECTS:
165: *
166: * NOTES:
167: */
168: clnp_slowtimo()
169: {
170: register struct clnp_fragl *cfh = clnp_frags;
171: int s = splnet();
172:
173: while (cfh != NULL) {
174: if (--cfh->cfl_ttl == 0) {
175: cfh = clnp_freefrags(cfh);
176: INCSTAT(cns_fragtimeout);
177: } else {
178: cfh = cfh->cfl_next;
179: }
180: }
181: splx(s);
182: }
183:
184: /*
185: * FUNCTION: clnp_drain
186: *
187: * PURPOSE: drain off all datagram fragments
188: *
189: * RETURNS: none
190: *
191: * SIDE EFFECTS:
192: *
193: * NOTES:
194: * TODO: should send back ER
195: */
196: clnp_drain()
197: {
198: register struct clnp_fragl *cfh = clnp_frags;
199:
200: while (cfh != NULL)
201: cfh = clnp_freefrags(cfh);
202: }
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