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9cef6668 | 1 | /* |
262a0e14 | 2 | * $Id$ |
9cef6668 | 3 | * |
cc192b50 | 4 | * DEBUG: section 12 Internet Cache Protocol (ICP) |
9cef6668 | 5 | * AUTHOR: Duane Wessels |
6 | * | |
2b6662ba | 7 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
9cef6668 | 8 | * ---------------------------------------------------------- |
9 | * | |
2b6662ba | 10 | * Squid is the result of efforts by numerous individuals from |
11 | * the Internet community; see the CONTRIBUTORS file for full | |
12 | * details. Many organizations have provided support for Squid's | |
13 | * development; see the SPONSORS file for full details. Squid is | |
14 | * Copyrighted (C) 2001 by the Regents of the University of | |
15 | * California; see the COPYRIGHT file for full details. Squid | |
16 | * incorporates software developed and/or copyrighted by other | |
17 | * sources; see the CREDITS file for full details. | |
9cef6668 | 18 | * |
19 | * This program is free software; you can redistribute it and/or modify | |
20 | * it under the terms of the GNU General Public License as published by | |
21 | * the Free Software Foundation; either version 2 of the License, or | |
22 | * (at your option) any later version. | |
26ac0430 | 23 | * |
9cef6668 | 24 | * This program is distributed in the hope that it will be useful, |
25 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
26 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
27 | * GNU General Public License for more details. | |
26ac0430 | 28 | * |
9cef6668 | 29 | * You should have received a copy of the GNU General Public License |
30 | * along with this program; if not, write to the Free Software | |
31 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
32 | * | |
33 | */ | |
34 | ||
63be0a78 | 35 | /** |
36 | \defgroup ServerProtocolICPInternal3 ICPv3 Internals | |
37 | \ingroup ServerProtocolICPAPI | |
38 | */ | |
39 | ||
582c2af2 | 40 | #include "squid.h" |
e6ccf245 | 41 | #include "Store.h" |
42 | #include "ICP.h" | |
528b2c61 | 43 | #include "HttpRequest.h" |
e6ccf245 | 44 | |
63be0a78 | 45 | /// \ingroup ServerProtocolICPInternal3 |
62e76326 | 46 | class ICP3State : public ICPState, public StoreClient |
47 | { | |
48 | ||
e6ccf245 | 49 | public: |
63be0a78 | 50 | ICP3State(icp_common_t &aHeader, HttpRequest *aRequest) : |
26ac0430 | 51 | ICPState(aHeader, aRequest) {} |
62e76326 | 52 | |
e6ccf245 | 53 | ~ICP3State(); |
54 | void created (StoreEntry *newEntry); | |
55 | }; | |
56 | ||
63be0a78 | 57 | /// \ingroup ServerProtocolICPInternal3 |
e6ccf245 | 58 | static void |
b7ac5457 | 59 | doV3Query(int fd, Ip::Address &from, char *buf, icp_common_t header) |
e6ccf245 | 60 | { |
61 | /* We have a valid packet */ | |
09aabd84 | 62 | char *url = buf + sizeof(icp_common_t) + sizeof(uint32_t); |
cc192b50 | 63 | HttpRequest *icp_request = icpGetRequest (url, header.reqnum, fd, from); |
62e76326 | 64 | |
e6ccf245 | 65 | if (!icp_request) |
62e76326 | 66 | return; |
67 | ||
26ac0430 | 68 | if (!icpAccessAllowed(from, icp_request)) { |
cc192b50 | 69 | icpDenyAccess (from, url, header.reqnum, fd); |
5cafad19 | 70 | delete icp_request; |
62e76326 | 71 | return; |
e6ccf245 | 72 | } |
62e76326 | 73 | |
e6ccf245 | 74 | /* The peer is allowed to use this cache */ |
f72fb56b | 75 | ICP3State *state = new ICP3State (header, icp_request); |
62e76326 | 76 | |
e6ccf245 | 77 | state->fd = fd; |
62e76326 | 78 | |
e6ccf245 | 79 | state->from = from; |
62e76326 | 80 | |
e6ccf245 | 81 | state->url = xstrdup (url); |
62e76326 | 82 | |
3b13a8fd | 83 | StoreEntry::getPublic (state, url, METHOD_GET); |
e6ccf245 | 84 | } |
85 | ||
63be0a78 | 86 | ICP3State::~ICP3State() |
62e76326 | 87 | {} |
e6ccf245 | 88 | |
89 | void | |
63be0a78 | 90 | ICP3State::created(StoreEntry *newEntry) |
e6ccf245 | 91 | { |
92 | StoreEntry *entry = newEntry->isNull () ? NULL : newEntry; | |
bf8fe701 | 93 | debugs(12, 5, "icpHandleIcpV3: OPCODE " << icp_opcode_str[header.opcode]); |
e6ccf245 | 94 | icp_opcode codeToSend; |
62e76326 | 95 | |
e6ccf245 | 96 | if (icpCheckUdpHit(entry, request)) { |
62e76326 | 97 | codeToSend = ICP_HIT; |
e6ccf245 | 98 | } else if (icpGetCommonOpcode() == ICP_ERR) |
62e76326 | 99 | codeToSend = ICP_MISS; |
e6ccf245 | 100 | else |
62e76326 | 101 | codeToSend = icpGetCommonOpcode(); |
102 | ||
cc192b50 | 103 | icpCreateAndSend (codeToSend, 0, url, header.reqnum, 0, fd, from); |
62e76326 | 104 | |
e6ccf245 | 105 | delete this; |
106 | } | |
7a2f978b | 107 | |
63be0a78 | 108 | |
109 | /// \ingroup ServerProtocolICPInternal3 | |
7a2f978b | 110 | /* Currently Harvest cached-2.x uses ICP_VERSION_3 */ |
111 | void | |
b7ac5457 | 112 | icpHandleIcpV3(int fd, Ip::Address &from, char *buf, int len) |
7a2f978b | 113 | { |
26ac0430 | 114 | if (len <= 0) { |
bf8fe701 | 115 | debugs(12, 3, "icpHandleIcpV3: ICP message is too small"); |
62e76326 | 116 | return; |
e6ccf245 | 117 | } |
62e76326 | 118 | |
e6ccf245 | 119 | icp_common_t header (buf, len); |
7b83b3d9 | 120 | /* |
121 | * Length field should match the number of bytes read | |
122 | */ | |
62e76326 | 123 | |
26ac0430 | 124 | if (len != header.length) { |
bf8fe701 | 125 | debugs(12, 3, "icpHandleIcpV3: ICP message is too small"); |
62e76326 | 126 | return; |
7b83b3d9 | 127 | } |
62e76326 | 128 | |
26ac0430 | 129 | switch (header.opcode) { |
62e76326 | 130 | |
27cd7235 | 131 | case ICP_QUERY: |
cc192b50 | 132 | doV3Query(fd, from, buf, header); |
62e76326 | 133 | break; |
7a2f978b | 134 | |
27cd7235 | 135 | case ICP_HIT: |
62e76326 | 136 | |
27cd7235 | 137 | case ICP_DECHO: |
62e76326 | 138 | |
27cd7235 | 139 | case ICP_MISS: |
62e76326 | 140 | |
27cd7235 | 141 | case ICP_DENIED: |
62e76326 | 142 | |
27cd7235 | 143 | case ICP_MISS_NOFETCH: |
cc192b50 | 144 | header.handleReply(buf, from); |
62e76326 | 145 | break; |
7a2f978b | 146 | |
27cd7235 | 147 | case ICP_INVALID: |
62e76326 | 148 | |
27cd7235 | 149 | case ICP_ERR: |
62e76326 | 150 | break; |
7a2f978b | 151 | |
152 | default: | |
fa84c01d | 153 | debugs(12, DBG_CRITICAL, "icpHandleIcpV3: UNKNOWN OPCODE: " << header.opcode << " from " << from); |
62e76326 | 154 | break; |
7a2f978b | 155 | } |
7a2f978b | 156 | } |