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aa839030 | 1 | /* |
5b74111a | 2 | * Copyright (C) 1996-2018 The Squid Software Foundation and contributors |
aa839030 | 3 | * |
bbc27441 AJ |
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. | |
aa839030 | 7 | */ |
8 | ||
9 | #ifndef SQUID_PEERDIGEST_H | |
10 | #define SQUID_PEERDIGEST_H | |
11 | ||
aa839030 | 12 | #if USE_CACHE_DIGESTS |
13 | ||
14 | #include "cbdata.h" | |
e8baef82 | 15 | #include "StatCounters.h" |
aa839030 | 16 | |
1b2f0924 FC |
17 | class Version |
18 | { | |
4d5904f7 | 19 | public: |
f53969cc SM |
20 | short int current; /* current version */ |
21 | short int required; /* minimal version that can safely handle current version */ | |
aa839030 | 22 | }; |
23 | ||
24 | /* digest control block; used for transmission and storage */ | |
25 | ||
26 | class StoreDigestCBlock | |
27 | { | |
26ac0430 | 28 | public: |
aa839030 | 29 | Version ver; |
30 | int capacity; | |
31 | int count; | |
32 | int del_count; | |
33 | int mask_size; | |
34 | unsigned char bits_per_entry; | |
35 | unsigned char hash_func_count; | |
36 | short int reserved_short; | |
37 | int reserved[32 - 6]; | |
38 | }; | |
39 | ||
73a4878a | 40 | class HttpRequest; |
c6983ec7 | 41 | class PeerDigest; |
73a4878a AJ |
42 | class store_client; |
43 | ||
1b2f0924 FC |
44 | class DigestFetchState |
45 | { | |
a44986dc AJ |
46 | CBDATA_CLASS(DigestFetchState); |
47 | ||
efdc32f4 | 48 | public: |
a44986dc AJ |
49 | DigestFetchState(PeerDigest *,HttpRequest *); |
50 | ~DigestFetchState(); | |
51 | ||
aa839030 | 52 | PeerDigest *pd; |
53 | StoreEntry *entry; | |
54 | StoreEntry *old_entry; | |
55 | store_client *sc; | |
56 | store_client *old_sc; | |
57 | HttpRequest *request; | |
58 | int offset; | |
831e953c | 59 | uint32_t mask_offset; |
aa839030 | 60 | time_t start_time; |
61 | time_t resp_time; | |
62 | time_t expires; | |
63 | ||
26ac0430 | 64 | struct { |
aa839030 | 65 | int msg; |
66 | int bytes; | |
a44986dc | 67 | } sent, recv; |
aa839030 | 68 | |
aa839030 | 69 | char buf[SM_PAGE_SIZE]; |
70 | ssize_t bufofs; | |
71 | digest_read_state_t state; | |
72 | }; | |
73 | ||
74 | class PeerDigest | |
75 | { | |
5c2f68b7 | 76 | CBDATA_CLASS(PeerDigest); |
aa839030 | 77 | |
78 | public: | |
a3c6762c | 79 | CachePeer *peer; /**< pointer back to peer structure, argh */ |
e1f7507e AJ |
80 | CacheDigest *cd; /**< actual digest structure */ |
81 | String host; /**< copy of peer->host */ | |
82 | const char *req_result; /**< text status of the last request */ | |
aa839030 | 83 | |
26ac0430 | 84 | struct { |
be4d35dc FC |
85 | bool needed; /**< there were requests for this digest */ |
86 | bool usable; /**< can be used for lookups */ | |
87 | bool requested; /**< in process of receiving [fresh] digest */ | |
3d0ac046 | 88 | } flags; |
aa839030 | 89 | |
26ac0430 | 90 | struct { |
aa839030 | 91 | /* all times are absolute unless augmented with _delay */ |
f53969cc SM |
92 | time_t initialized; /* creation */ |
93 | time_t needed; /* first lookup/use by a peer */ | |
94 | time_t next_check; /* next scheduled check/refresh event */ | |
95 | time_t retry_delay; /* delay before re-checking _invalid_ digest */ | |
96 | time_t requested; /* requested a fresh copy of a digest */ | |
97 | time_t req_delay; /* last request response time */ | |
98 | time_t received; /* received the current copy of a digest */ | |
99 | time_t disabled; /* disabled for good */ | |
3d0ac046 | 100 | } times; |
aa839030 | 101 | |
26ac0430 | 102 | struct { |
e8baef82 | 103 | CacheDigestGuessStats guess; |
aa839030 | 104 | int used_count; |
105 | ||
26ac0430 | 106 | struct { |
aa839030 | 107 | int msgs; |
a0864754 | 108 | ByteCounter kbytes; |
3d0ac046 HN |
109 | } sent, recv; |
110 | } stats; | |
aa839030 | 111 | }; |
112 | ||
113 | extern const Version CacheDigestVer; | |
e1f7507e | 114 | |
8a648e8d FC |
115 | PeerDigest *peerDigestCreate(CachePeer * p); |
116 | void peerDigestNeeded(PeerDigest * pd); | |
117 | void peerDigestNotePeerGone(PeerDigest * pd); | |
118 | void peerDigestStatsReport(const PeerDigest * pd, StoreEntry * e); | |
fc54b8d2 | 119 | |
e1f7507e | 120 | #endif /* USE_CACHE_DIGESTS */ |
aa839030 | 121 | |
122 | #endif /* SQUID_PEERDIGEST_H */ | |
f53969cc | 123 |