2 * Copyright 1997 Massachusetts Institute of Technology
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5 * its documentation for any purpose and without fee is hereby
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29 * $FreeBSD: src/sys/netinet/in_hostcache.h,v 1.3 1999/12/29 04:40:59 peter Exp $
30 * $DragonFly: src/sys/netinet/in_hostcache.h,v 1.4 2006/05/20 04:42:12 dillon Exp $
33 #ifndef _NETINET_IN_HOSTCACHE_H
34 #define _NETINET_IN_HOSTCACHE_H
36 #ifndef _NET_HOSTCACHE_H_
37 #include <net/hostcache.h>
41 * This file defines the particular structures contained in the host cache
46 * An IP host cache entry. Note that we include the srtt/var here,
47 * with the expectation that it might be used to keep a persistent,
48 * cross-connection view of this statistic.
51 struct hcentry inhc_hc
;
58 int inhc_srtt
; /* VJ RTT estimator */
59 int inhc_srttvar
; /* VJ */
60 u_int inhc_rttmin
; /* VJ */
61 int inhc_rxt
; /* TCP retransmit timeout */
62 u_long inhc_cc
; /* deliberate type pun with tcp_cc */
63 u_long inhc_ccsent
; /* as above */
69 #define inhc_addr(inhc) ((struct sockaddr_in *)(inhc)->inhc_hc.hc_host)
71 /* Flags for inhc_flags... */
72 #define INHC_LOCAL 0x0001 /* this address is local */
73 #define INHC_BROADCAST 0x0002 /* this address is broadcast */
74 #define INHC_MULTICAST 0x0004 /* this address is multicast */
75 #define INHC_REDUCEDMTU 0x0008 /* we reduced the mtu via PMTU discovery */
79 * inhc_alloc can block while adding a new entry to the cache;
80 * inhc_lookup will does not add new entries and so can be called
81 * in non-process context.
83 struct in_hcentry
*inhc_alloc(struct sockaddr_in
*sin
);
85 struct in_hcentry
*inhc_lookup(struct sockaddr_in
*sin
);
86 #define inhc_ref(inhc) (hc_ref(&(inhc)->inhc_hc))
87 #define inhc_rele(inhc) (hc_rele(&(inhc)->inhc_hc))
90 #endif /* _NETINET_IN_HOSTCACHE_H */