1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2002 Andre Oppermann, Internet Business Solutions AG 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 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 17 * permission. 18 * 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 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD$ 32 */ 33 34 /* 35 * Many thanks to jlemon for basic structure of tcp_syncache which is being 36 * followed here. 37 */ 38 39 #ifndef _NETINET_TCP_HOSTCACHE_H_ 40 #define _NETINET_TCP_HOSTCACHE_H_ 41 42 TAILQ_HEAD(hc_qhead, hc_metrics); 43 44 struct hc_head { 45 struct hc_qhead hch_bucket; 46 u_int hch_length; 47 struct mtx hch_mtx; 48 }; 49 50 struct hc_metrics { 51 /* housekeeping */ 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 */ 69 }; 70 71 struct tcp_hostcache { 72 struct hc_head *hashbase; 73 uma_zone_t zone; 74 u_int hashsize; 75 u_int hashmask; 76 u_int bucket_limit; 77 u_int cache_count; 78 u_int cache_limit; 79 int expire; 80 int prune; 81 int purgeall; 82 }; 83 84 #endif /* !_NETINET_TCP_HOSTCACHE_H_*/ 85