2 * Copyright (C) 1996-2015 The Squid Software Foundation and contributors
4 * Squid software is distributed under GPLv2+ license and includes
5 * contributions from numerous individuals and organizations.
6 * Please see the COPYING and CONTRIBUTORS files for details.
9 #ifndef SQUID_PEERDIGEST_H
10 #define SQUID_PEERDIGEST_H
15 /* for CacheDigestGuessStats */
16 #include "StatCounters.h"
21 short int current
; /* current version */
22 short int required
; /* minimal version that can safely handle current version */
25 /* digest control block; used for transmission and storage */
27 class StoreDigestCBlock
35 unsigned char bits_per_entry
;
36 unsigned char hash_func_count
;
37 short int reserved_short
;
45 class DigestFetchState
50 StoreEntry
*old_entry
;
66 char buf
[SM_PAGE_SIZE
];
68 digest_read_state_t state
;
73 CBDATA_CLASS(PeerDigest
);
76 CachePeer
*peer
; /**< pointer back to peer structure, argh */
77 CacheDigest
*cd
; /**< actual digest structure */
78 String host
; /**< copy of peer->host */
79 const char *req_result
; /**< text status of the last request */
82 bool needed
; /**< there were requests for this digest */
83 bool usable
; /**< can be used for lookups */
84 bool requested
; /**< in process of receiving [fresh] digest */
88 /* all times are absolute unless augmented with _delay */
89 time_t initialized
; /* creation */
90 time_t needed
; /* first lookup/use by a peer */
91 time_t next_check
; /* next scheduled check/refresh event */
92 time_t retry_delay
; /* delay before re-checking _invalid_ digest */
93 time_t requested
; /* requested a fresh copy of a digest */
94 time_t req_delay
; /* last request response time */
95 time_t received
; /* received the current copy of a digest */
96 time_t disabled
; /* disabled for good */
100 CacheDigestGuessStats guess
;
110 extern const Version CacheDigestVer
;
112 PeerDigest
*peerDigestCreate(CachePeer
* p
);
113 void peerDigestNeeded(PeerDigest
* pd
);
114 void peerDigestNotePeerGone(PeerDigest
* pd
);
115 void peerDigestStatsReport(const PeerDigest
* pd
, StoreEntry
* e
);
117 #endif /* USE_CACHE_DIGESTS */
119 #endif /* SQUID_PEERDIGEST_H */