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664a31e496
is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come.
84 lines
3.1 KiB
C
84 lines
3.1 KiB
C
/*
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* Copyright 1997 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby
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* granted, provided that both the above copyright notice and this
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* permission notice appear in all copies, that both the above
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* copyright notice and this permission notice appear in all
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* supporting documentation, and that the name of M.I.T. not be used
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* in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission. M.I.T. makes
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
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* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
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* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _NETINET_IN_HOSTCACHE_H
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#define _NETINET_IN_HOSTCACHE_H 1
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/*
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* This file defines the particular structures contained in the host cache
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* for the use of IP.
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*/
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/*
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* An IP host cache entry. Note that we include the srtt/var here,
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* with the expectation that it might be used to keep a persistent,
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* cross-connection view of this statistic.
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*/
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struct in_hcentry {
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struct hcentry inhc_hc;
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u_long inhc_pmtu;
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u_long inhc_recvpipe;
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u_long inhc_sendpipe;
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u_long inhc_pksent;
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u_long inhc_flags;
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u_long inhc_ssthresh;
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int inhc_srtt; /* VJ RTT estimator */
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int inhc_srttvar; /* VJ */
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u_int inhc_rttmin; /* VJ */
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int inhc_rxt; /* TCP retransmit timeout */
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u_long inhc_cc; /* deliberate type pun with tcp_cc */
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u_long inhc_ccsent; /* as above */
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u_short inhc_mssopt;
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};
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#define inhc_addr(inhc) ((struct sockaddr_in *)(inhc)->inhc_hc.hc_host)
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/* Flags for inhc_flags... */
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#define INHC_LOCAL 0x0001 /* this address is local */
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#define INHC_BROADCAST 0x0002 /* this address is broadcast */
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#define INHC_MULTICAST 0x0004 /* this address is multicast */
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#define INHC_REDUCEDMTU 0x0008 /* we reduced the mtu via PMTU discovery */
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#ifdef _KERNEL
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/*
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* inhc_alloc can block while adding a new entry to the cache;
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* inhc_lookup will does not add new entries and so can be called
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* in non-process context.
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*/
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struct in_hcentry *inhc_alloc(struct sockaddr_in *sin);
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int inhc_init(void);
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struct in_hcentry *inhc_lookup(struct sockaddr_in *sin);
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#define inhc_ref(inhc) (hc_ref(&(inhc)->inhc_hc))
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#define inhc_rele(inhc) (hc_rele(&(inhc)->inhc_hc))
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#endif
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#endif /* _NETINET_IN_HOSTCACHE_H */
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