Current Path : /sys/netinet/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/netinet/tcp_syncache.h |
/*- * Copyright (c) 1982, 1986, 1993, 1994, 1995 * 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. * 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. * * @(#)tcp_var.h 8.4 (Berkeley) 5/24/95 * $FreeBSD: release/9.1.0/sys/netinet/tcp_syncache.h 224151 2011-07-17 21:15:20Z bz $ */ #ifndef _NETINET_TCP_SYNCACHE_H_ #define _NETINET_TCP_SYNCACHE_H_ #ifdef _KERNEL struct toeopt; void syncache_init(void); #ifdef VIMAGE void syncache_destroy(void); #endif void syncache_unreach(struct in_conninfo *, struct tcphdr *); int syncache_expand(struct in_conninfo *, struct tcpopt *, struct tcphdr *, struct socket **, struct mbuf *); int tcp_offload_syncache_expand(struct in_conninfo *inc, struct toeopt *toeo, struct tcphdr *th, struct socket **lsop, struct mbuf *m); void syncache_add(struct in_conninfo *, struct tcpopt *, struct tcphdr *, struct inpcb *, struct socket **, struct mbuf *); void tcp_offload_syncache_add(struct in_conninfo *, struct toeopt *, struct tcphdr *, struct inpcb *, struct socket **, struct toe_usrreqs *tu, void *toepcb); void syncache_chkrst(struct in_conninfo *, struct tcphdr *); void syncache_badack(struct in_conninfo *); int syncache_pcbcount(void); int syncache_pcblist(struct sysctl_req *req, int max_pcbs, int *pcbs_exported); struct syncache { TAILQ_ENTRY(syncache) sc_hash; struct in_conninfo sc_inc; /* addresses */ int sc_rxttime; /* retransmit time */ u_int16_t sc_rxmits; /* retransmit counter */ u_int32_t sc_tsreflect; /* timestamp to reflect */ u_int32_t sc_ts; /* our timestamp to send */ u_int32_t sc_tsoff; /* ts offset w/ syncookies */ u_int32_t sc_flowlabel; /* IPv6 flowlabel */ tcp_seq sc_irs; /* seq from peer */ tcp_seq sc_iss; /* our ISS */ struct mbuf *sc_ipopts; /* source route */ u_int16_t sc_peer_mss; /* peer's MSS */ u_int16_t sc_wnd; /* advertised window */ u_int8_t sc_ip_ttl; /* IPv4 TTL */ u_int8_t sc_ip_tos; /* IPv4 TOS */ u_int8_t sc_requested_s_scale:4, sc_requested_r_scale:4; u_int16_t sc_flags; #ifndef TCP_OFFLOAD_DISABLE struct toe_usrreqs *sc_tu; /* TOE operations */ void *sc_toepcb; /* TOE protocol block */ #endif struct label *sc_label; /* MAC label reference */ struct ucred *sc_cred; /* cred cache for jail checks */ u_int32_t sc_spare[2]; /* UTO */ }; /* * Flags for the sc_flags field. */ #define SCF_NOOPT 0x01 /* no TCP options */ #define SCF_WINSCALE 0x02 /* negotiated window scaling */ #define SCF_TIMESTAMP 0x04 /* negotiated timestamps */ /* MSS is implicit */ #define SCF_UNREACH 0x10 /* icmp unreachable received */ #define SCF_SIGNATURE 0x20 /* send MD5 digests */ #define SCF_SACK 0x80 /* send SACK option */ #define SCF_ECN 0x100 /* send ECN setup packet */ #define SYNCOOKIE_SECRET_SIZE 8 /* dwords */ #define SYNCOOKIE_LIFETIME 16 /* seconds */ struct syncache_head { struct vnet *sch_vnet; struct mtx sch_mtx; TAILQ_HEAD(sch_head, syncache) sch_bucket; struct callout sch_timer; int sch_nextc; u_int sch_length; u_int sch_oddeven; u_int32_t sch_secbits_odd[SYNCOOKIE_SECRET_SIZE]; u_int32_t sch_secbits_even[SYNCOOKIE_SECRET_SIZE]; u_int sch_reseed; /* time_uptime, seconds */ }; struct tcp_syncache { struct syncache_head *hashbase; uma_zone_t zone; u_int hashsize; u_int hashmask; u_int bucket_limit; u_int cache_count; /* XXX: unprotected */ u_int cache_limit; u_int rexmt_limit; u_int hash_secret; }; #endif /* _KERNEL */ #endif /* !_NETINET_TCP_SYNCACHE_H_ */