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1067fd0f | 1 | /* |
ad787160 C |
2 | * Copyright (c) 1992, 1993 |
3 | * The Regents of the University of California. All rights reserved. | |
1067fd0f | 4 | * |
ad787160 C |
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. | |
1067fd0f | 20 | * |
ad787160 C |
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 | * | |
ed554bc5 | 33 | * @(#)tuba_table.c 8.2 (Berkeley) 11/15/93 |
1067fd0f | 34 | */ |
21715d8e KS |
35 | #include <sys/param.h> |
36 | #include <sys/systm.h> | |
37 | #include <sys/proc.h> | |
38 | #include <sys/mbuf.h> | |
39 | #include <sys/socket.h> | |
40 | #include <sys/socketvar.h> | |
41 | #include <sys/domain.h> | |
42 | #include <sys/protosw.h> | |
43 | #include <sys/ioctl.h> | |
44 | #include <sys/time.h> | |
45 | #include <sys/kernel.h> | |
1067fd0f | 46 | |
21715d8e | 47 | #include <net/if.h> |
21715d8e | 48 | #include <net/radix.h> |
1067fd0f | 49 | |
21715d8e | 50 | #include <netiso/iso.h> |
77db2796 | 51 | #include <netiso/tuba_table.h> |
1067fd0f KS |
52 | |
53 | int tuba_table_size; | |
54 | struct tuba_cache **tuba_table; | |
55 | struct radix_node_head *tuba_tree; | |
56 | extern int arpt_keep, arpt_prune; /* use same values as arp cache */ | |
57 | ||
58 | void | |
59 | tuba_timer() | |
60 | { | |
61 | int s = splnet(); | |
62 | int i; | |
21715d8e | 63 | register struct tuba_cache *tc; |
1067fd0f KS |
64 | long timelimit = time.tv_sec - arpt_keep; |
65 | ||
66 | timeout(tuba_timer, (caddr_t)0, arpt_prune * hz); | |
67 | for (i = tuba_table_size; i > 0; i--) | |
68 | if ((tc = tuba_table[i]) && (tc->tc_refcnt == 0) && | |
69 | (tc->tc_time < timelimit)) { | |
70 | tuba_table[i] = 0; | |
d32cd81f | 71 | rn_delete(&tc->tc_siso.siso_addr, NULL, tuba_tree); |
1067fd0f KS |
72 | free((caddr_t)tc, M_RTABLE); |
73 | } | |
74 | splx(s); | |
75 | } | |
76 | ||
21715d8e | 77 | tuba_table_init() |
1067fd0f | 78 | { |
0ef321d4 | 79 | rn_inithead((void **)&tuba_tree, 40); |
1067fd0f KS |
80 | timeout(tuba_timer, (caddr_t)0, arpt_prune * hz); |
81 | } | |
82 | ||
83 | int | |
7cfe65b5 KS |
84 | tuba_lookup(siso, wait) |
85 | register struct sockaddr_iso *siso; | |
1067fd0f | 86 | { |
21715d8e | 87 | struct radix_node *rn, *rn_match(); |
1067fd0f | 88 | register struct tuba_cache *tc; |
21715d8e | 89 | struct tuba_cache **new; |
77db2796 | 90 | int dupentry = 0, sum_a = 0, sum_b = 0, old_size, i; |
1067fd0f | 91 | |
7cfe65b5 KS |
92 | if ((rn = rn_match((caddr_t)&siso->siso_addr, tuba_tree->rnh_treetop)) |
93 | && ((rn->rn_flags & RNF_ROOT) == 0)) { | |
1067fd0f KS |
94 | tc = (struct tuba_cache *)rn; |
95 | tc->tc_time = time.tv_sec; | |
96 | return (tc->tc_index); | |
97 | } | |
98 | if ((tc = (struct tuba_cache *)malloc(sizeof(*tc), M_RTABLE, wait)) | |
99 | == NULL) | |
100 | return (0); | |
21715d8e | 101 | bzero((caddr_t)tc, sizeof (*tc)); |
7cfe65b5 KS |
102 | bcopy(siso->siso_data, tc->tc_siso.siso_data, |
103 | tc->tc_siso.siso_nlen = siso->siso_nlen); | |
d32cd81f | 104 | rn_insert(&tc->tc_siso.siso_addr, tuba_tree, &dupentry, tc->tc_nodes); |
8c53a772 KS |
105 | if (dupentry) |
106 | panic("tuba_lookup 1"); | |
ff38aee7 KS |
107 | tc->tc_siso.siso_family = AF_ISO; |
108 | tc->tc_siso.siso_len = sizeof(tc->tc_siso); | |
1067fd0f | 109 | tc->tc_time = time.tv_sec; |
7cfe65b5 | 110 | for (i = sum_a = tc->tc_siso.siso_nlen; --i >= 0; ) |
1770ae00 | 111 | (i & 1 ? sum_a : sum_b) += (u_char)tc->tc_siso.siso_data[i]; |
8c53a772 KS |
112 | REDUCE(tc->tc_sum, (sum_a << 8) + sum_b); |
113 | HTONS(tc->tc_sum); | |
315cfecc | 114 | SWAB(tc->tc_ssum, tc->tc_sum); |
1067fd0f KS |
115 | for (i = tuba_table_size; i > 0; i--) |
116 | if (tuba_table[i] == 0) | |
8c53a772 | 117 | goto fixup; |
77db2796 | 118 | old_size = tuba_table_size; |
1067fd0f KS |
119 | if (tuba_table_size == 0) |
120 | tuba_table_size = 15; | |
121 | if (tuba_table_size > 0x7fff) | |
122 | return (0); | |
123 | tuba_table_size = 1 + 2 * tuba_table_size; | |
124 | i = (tuba_table_size + 1) * sizeof(tc); | |
125 | new = (struct tuba_cache **)malloc((unsigned)i, M_RTABLE, wait); | |
126 | if (new == 0) { | |
127 | tuba_table_size = old_size; | |
d32cd81f | 128 | rn_delete(&tc->tc_siso.siso_addr, NULL, tuba_tree); |
1067fd0f KS |
129 | free((caddr_t)tc, M_RTABLE); |
130 | return (0); | |
131 | } | |
132 | bzero((caddr_t)new, (unsigned)i); | |
77db2796 | 133 | if (tuba_table) { |
1067fd0f | 134 | bcopy((caddr_t)tuba_table, (caddr_t)new, i >> 1); |
77db2796 KS |
135 | free((caddr_t)tuba_table, M_RTABLE); |
136 | } | |
137 | tuba_table = new; | |
8c53a772 KS |
138 | i = tuba_table_size; |
139 | fixup: | |
140 | tuba_table[i] = tc; | |
141 | tc->tc_index = i; | |
1067fd0f KS |
142 | return (tc->tc_index); |
143 | } |