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15637ed4 RG |
1 | /*- |
2 | * Copyright (c) 1991 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | * | |
33 | * @(#)clnp_timer.c 7.5 (Berkeley) 5/6/91 | |
34 | */ | |
35 | ||
36 | /*********************************************************** | |
37 | Copyright IBM Corporation 1987 | |
38 | ||
39 | All Rights Reserved | |
40 | ||
41 | Permission to use, copy, modify, and distribute this software and its | |
42 | documentation for any purpose and without fee is hereby granted, | |
43 | provided that the above copyright notice appear in all copies and that | |
44 | both that copyright notice and this permission notice appear in | |
45 | supporting documentation, and that the name of IBM not be | |
46 | used in advertising or publicity pertaining to distribution of the | |
47 | software without specific, written prior permission. | |
48 | ||
49 | IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING | |
50 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL | |
51 | IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR | |
52 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, | |
53 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, | |
54 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |
55 | SOFTWARE. | |
56 | ||
57 | ******************************************************************/ | |
58 | ||
59 | /* | |
60 | * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison | |
61 | */ | |
62 | /* $Header: clnp_timer.c,v 4.2 88/06/29 14:59:05 hagens Exp $ */ | |
63 | /* $Source: /usr/argo/sys/netiso/RCS/clnp_timer.c,v $ */ | |
64 | ||
65 | #include "param.h" | |
66 | #include "mbuf.h" | |
67 | #include "domain.h" | |
68 | #include "protosw.h" | |
69 | #include "socket.h" | |
70 | #include "socketvar.h" | |
71 | #include "errno.h" | |
72 | ||
73 | #include "../net/if.h" | |
74 | #include "../net/route.h" | |
75 | ||
76 | #include "iso.h" | |
77 | #include "clnp.h" | |
78 | #include "clnp_stat.h" | |
79 | #include "argo_debug.h" | |
80 | ||
81 | extern struct clnp_fragl *clnp_frags; | |
82 | ||
83 | /* | |
84 | * FUNCTION: clnp_freefrags | |
85 | * | |
86 | * PURPOSE: Free the resources associated with a fragment | |
87 | * | |
88 | * RETURNS: pointer to next fragment in list of fragments | |
89 | * | |
90 | * SIDE EFFECTS: | |
91 | * | |
92 | * NOTES: | |
93 | * TODO: send ER back to source | |
94 | */ | |
95 | struct clnp_fragl * | |
96 | clnp_freefrags(cfh) | |
97 | register struct clnp_fragl *cfh; /* fragment header to delete */ | |
98 | { | |
99 | struct clnp_fragl *next = cfh->cfl_next; | |
100 | struct clnp_frag *cf; | |
101 | ||
102 | /* free any frags hanging around */ | |
103 | cf = cfh->cfl_frags; | |
104 | while (cf != NULL) { | |
105 | struct clnp_frag *cf_next = cf->cfr_next; | |
106 | INCSTAT(cns_fragdropped); | |
107 | m_freem(cf->cfr_data); | |
108 | cf = cf_next; | |
109 | } | |
110 | ||
111 | /* free the copy of the header */ | |
112 | INCSTAT(cns_fragdropped); | |
113 | m_freem(cfh->cfl_orighdr); | |
114 | ||
115 | if (clnp_frags == cfh) { | |
116 | clnp_frags = cfh->cfl_next; | |
117 | } else { | |
118 | struct clnp_fragl *scan; | |
119 | ||
120 | for (scan = clnp_frags; scan != NULL; scan = scan->cfl_next) { | |
121 | if (scan->cfl_next == cfh) { | |
122 | scan->cfl_next = cfh->cfl_next; | |
123 | break; | |
124 | } | |
125 | } | |
126 | } | |
127 | ||
128 | /* free the fragment header */ | |
129 | m_freem(dtom(cfh)); | |
130 | ||
131 | return(next); | |
132 | } | |
133 | ||
134 | /* | |
135 | * FUNCTION: clnp_slowtimo | |
136 | * | |
137 | * PURPOSE: clnp timer processing; if the ttl expires on a | |
138 | * packet on the reassembly queue, discard it. | |
139 | * | |
140 | * RETURNS: none | |
141 | * | |
142 | * SIDE EFFECTS: | |
143 | * | |
144 | * NOTES: | |
145 | */ | |
146 | clnp_slowtimo() | |
147 | { | |
148 | register struct clnp_fragl *cfh = clnp_frags; | |
149 | int s = splnet(); | |
150 | ||
151 | while (cfh != NULL) { | |
152 | if (--cfh->cfl_ttl == 0) { | |
153 | cfh = clnp_freefrags(cfh); | |
154 | INCSTAT(cns_fragtimeout); | |
155 | } else { | |
156 | cfh = cfh->cfl_next; | |
157 | } | |
158 | } | |
159 | splx(s); | |
160 | } | |
161 | ||
162 | /* | |
163 | * FUNCTION: clnp_drain | |
164 | * | |
165 | * PURPOSE: drain off all datagram fragments | |
166 | * | |
167 | * RETURNS: none | |
168 | * | |
169 | * SIDE EFFECTS: | |
170 | * | |
171 | * NOTES: | |
172 | * TODO: should send back ER | |
173 | */ | |
174 | clnp_drain() | |
175 | { | |
176 | register struct clnp_fragl *cfh = clnp_frags; | |
177 | ||
178 | while (cfh != NULL) | |
179 | cfh = clnp_freefrags(cfh); | |
180 | } |