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b24880fe | 1 | /* |
b24880fe | 2 | * AUTHOR: Robert Collins |
3 | * | |
4 | * SQUID Web Proxy Cache http://www.squid-cache.org/ | |
5 | * ---------------------------------------------------------- | |
6 | * | |
7 | * Squid is the result of efforts by numerous individuals from | |
8 | * the Internet community; see the CONTRIBUTORS file for full | |
9 | * details. Many organizations have provided support for Squid's | |
10 | * development; see the SPONSORS file for full details. Squid is | |
11 | * Copyrighted (C) 2001 by the Regents of the University of | |
12 | * California; see the COPYRIGHT file for full details. Squid | |
13 | * incorporates software developed and/or copyrighted by other | |
14 | * sources; see the CREDITS file for full details. | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or modify | |
17 | * it under the terms of the GNU General Public License as published by | |
18 | * the Free Software Foundation; either version 2 of the License, or | |
19 | * (at your option) any later version. | |
26ac0430 | 20 | * |
b24880fe | 21 | * This program is distributed in the hope that it will be useful, |
22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | * GNU General Public License for more details. | |
26ac0430 | 25 | * |
b24880fe | 26 | * You should have received a copy of the GNU General Public License |
27 | * along with this program; if not, write to the Free Software | |
28 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
29 | * | |
30 | * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org> | |
31 | */ | |
32 | ||
33 | #ifndef SQUID_PEERSELECTSTATE_H | |
34 | #define SQUID_PEERSELECTSTATE_H | |
35 | ||
2efeb0b7 | 36 | #include "acl/Checklist.h" |
cfd66529 | 37 | #include "Array.h" |
aa839030 | 38 | #include "cbdata.h" |
f9b72e0c AJ |
39 | #include "comm/forward.h" |
40 | #include "hier_code.h" | |
cfd66529 | 41 | #include "PingData.h" |
96d89ea0 | 42 | #include "ip/Address.h" |
cfd66529 AJ |
43 | |
44 | class HttpRequest; | |
45 | class StoreEntry; | |
a37fdd8a | 46 | class ErrorState; |
cfd66529 | 47 | |
a37fdd8a | 48 | typedef void PSC(Comm::ConnectionList *, ErrorState *, void *); |
cfd66529 | 49 | |
00ae51e4 | 50 | SQUIDCEXTERN void peerSelect(Comm::ConnectionList *, HttpRequest *, StoreEntry *, PSC *, void *data); |
cfd66529 AJ |
51 | SQUIDCEXTERN void peerSelectInit(void); |
52 | ||
53 | /** | |
54 | * A peer which has been selected as a possible destination. | |
55 | * Listed as pointers here so as to prevent duplicates being added but will | |
56 | * be converted to a set of IP address path options before handing back out | |
57 | * to the caller. | |
58 | * | |
59 | * Certain connection flags and outgoing settings will also be looked up and | |
60 | * set based on the received request and peer settings before handing back. | |
61 | */ | |
62 | class FwdServer | |
63 | { | |
64 | public: | |
65 | peer *_peer; /* NULL --> origin server */ | |
66 | hier_code code; | |
67 | FwdServer *next; | |
68 | }; | |
b24880fe | 69 | |
70 | class ps_state | |
71 | { | |
72 | ||
73 | public: | |
74 | void *operator new(size_t); | |
75 | ps_state(); | |
76 | HttpRequest *request; | |
77 | StoreEntry *entry; | |
2efeb0b7 AJ |
78 | allow_t always_direct; |
79 | allow_t never_direct; | |
80 | int direct; // TODO: fold always_direct/never_direct/prefer_direct into this now that ACL can do a multi-state result. | |
b24880fe | 81 | PSC *callback; |
82 | void *callback_data; | |
a37fdd8a | 83 | ErrorState *lastError; |
cfd66529 | 84 | |
00ae51e4 | 85 | Comm::ConnectionList *paths; ///< the callers paths array. to be filled with our final results. |
aed188fd | 86 | FwdServer *servers; ///< temporary linked list of peers we will pass back. |
cfd66529 | 87 | |
b24880fe | 88 | /* |
b7ac5457 | 89 | * Why are these Ip::Address instead of peer *? Because a |
b24880fe | 90 | * peer structure can become invalid during the peer selection |
91 | * phase, specifically after a reconfigure. Thus we need to lookup | |
92 | * the peer * based on the address when we are finally ready to | |
93 | * reference the peer structure. | |
94 | */ | |
95 | ||
b7ac5457 | 96 | Ip::Address first_parent_miss; |
b24880fe | 97 | |
b7ac5457 | 98 | Ip::Address closest_parent_miss; |
b24880fe | 99 | /* |
cc192b50 | 100 | * ->hit can be peer* because it should only be |
101 | * accessed during the thread when it is set | |
b24880fe | 102 | */ |
103 | peer *hit; | |
104 | peer_t hit_type; | |
b24880fe | 105 | ping_data ping; |
106 | ACLChecklist *acl_checklist; | |
aa839030 | 107 | private: |
108 | CBDATA_CLASS(ps_state); | |
b24880fe | 109 | }; |
110 | ||
b24880fe | 111 | #endif /* SQUID_PEERSELECTSTATE_H */ |