2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2002 Andre Oppermann, Internet Business Solutions AG
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote
16 * products derived from this software without specific prior written
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * Many thanks to jlemon for basic structure of tcp_syncache which is being
39 #ifndef _NETINET_TCP_HOSTCACHE_H_
40 #define _NETINET_TCP_HOSTCACHE_H_
42 TAILQ_HEAD(hc_qhead, hc_metrics);
45 struct hc_qhead hch_bucket;
52 TAILQ_ENTRY(hc_metrics) rmx_q;
53 struct hc_head *rmx_head; /* head of bucket tail queue */
54 struct in_addr ip4; /* IP address */
55 struct in6_addr ip6; /* IP6 address */
56 uint32_t ip6_zoneid; /* IPv6 scope zone id */
57 /* endpoint specific values for tcp */
58 uint32_t rmx_mtu; /* MTU for this path */
59 uint32_t rmx_ssthresh; /* outbound gateway buffer limit */
60 uint32_t rmx_rtt; /* estimated round trip time */
61 uint32_t rmx_rttvar; /* estimated rtt variance */
62 uint32_t rmx_cwnd; /* congestion window */
63 uint32_t rmx_sendpipe; /* outbound delay-bandwidth product */
64 uint32_t rmx_recvpipe; /* inbound delay-bandwidth product */
65 /* TCP hostcache internal data */
66 int rmx_expire; /* lifetime for object */
67 u_long rmx_hits; /* number of hits */
68 u_long rmx_updates; /* number of updates */
71 struct tcp_hostcache {
72 struct hc_head *hashbase;
84 #endif /* !_NETINET_TCP_HOSTCACHE_H_*/