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/* $NetBSD: tuba_table.c,v 1.4 1995/08/12 23:59:53 mycroft Exp $ */
/*
* Copyright (c) 1992, 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.
*
* @(#)tuba_table.c 8.2 (Berkeley) 11/15/93
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <net/if.h>
#include <net/radix.h>
#include <netiso/iso.h>
#include <netiso/tuba_table.h>
int tuba_table_size;
struct tuba_cache **tuba_table;
struct radix_node_head *tuba_tree;
extern int arpt_keep, arpt_prune; /* use same values as arp cache */
void
tuba_timer()
{
int s = splsoftnet();
int i;
register struct tuba_cache *tc;
long timelimit = time.tv_sec - arpt_keep;
timeout(tuba_timer, (caddr_t)0, arpt_prune * hz);
for (i = tuba_table_size; i > 0; i--)
if ((tc = tuba_table[i]) && (tc->tc_refcnt == 0) &&
(tc->tc_time < timelimit)) {
tuba_table[i] = 0;
rn_delete(&tc->tc_siso.siso_addr, NULL, tuba_tree);
free((caddr_t)tc, M_RTABLE);
}
splx(s);
}
tuba_table_init()
{
rn_inithead((void **)&tuba_tree, 40);
timeout(tuba_timer, (caddr_t)0, arpt_prune * hz);
}
int
tuba_lookup(siso, wait)
register struct sockaddr_iso *siso;
{
struct radix_node *rn, *rn_match();
register struct tuba_cache *tc;
struct tuba_cache **new;
int dupentry = 0, sum_a = 0, sum_b = 0, old_size, i;
if ((rn = rn_match((caddr_t)&siso->siso_addr, tuba_tree->rnh_treetop))
&& ((rn->rn_flags & RNF_ROOT) == 0)) {
tc = (struct tuba_cache *)rn;
tc->tc_time = time.tv_sec;
return (tc->tc_index);
}
if ((tc = (struct tuba_cache *)malloc(sizeof(*tc), M_RTABLE, wait))
== NULL)
return (0);
bzero((caddr_t)tc, sizeof (*tc));
bcopy(siso->siso_data, tc->tc_siso.siso_data,
tc->tc_siso.siso_nlen = siso->siso_nlen);
rn_insert(&tc->tc_siso.siso_addr, tuba_tree, &dupentry, tc->tc_nodes);
if (dupentry)
panic("tuba_lookup 1");
tc->tc_siso.siso_family = AF_ISO;
tc->tc_siso.siso_len = sizeof(tc->tc_siso);
tc->tc_time = time.tv_sec;
for (i = sum_a = tc->tc_siso.siso_nlen; --i >= 0; )
if (i & 1)
sum_a += (u_char)tc->tc_siso.siso_data[i];
else
sum_b += (u_char)tc->tc_siso.siso_data[i];
REDUCE(tc->tc_sum, (sum_a << 8) + sum_b);
HTONS(tc->tc_sum);
SWAB(tc->tc_ssum, tc->tc_sum);
for (i = tuba_table_size; i > 0; i--)
if (tuba_table[i] == 0)
goto fixup;
old_size = tuba_table_size;
if (tuba_table_size == 0)
tuba_table_size = 15;
if (tuba_table_size > 0x7fff)
return (0);
tuba_table_size = 1 + 2 * tuba_table_size;
i = (tuba_table_size + 1) * sizeof(tc);
new = (struct tuba_cache **)malloc((unsigned)i, M_RTABLE, wait);
if (new == 0) {
tuba_table_size = old_size;
rn_delete(&tc->tc_siso.siso_addr, NULL, tuba_tree);
free((caddr_t)tc, M_RTABLE);
return (0);
}
bzero((caddr_t)new, (unsigned)i);
if (tuba_table) {
bcopy((caddr_t)tuba_table, (caddr_t)new, i >> 1);
free((caddr_t)tuba_table, M_RTABLE);
}
tuba_table = new;
i = tuba_table_size;
fixup:
tuba_table[i] = tc;
tc->tc_index = i;
return (tc->tc_index);
}
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