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41462d93 | 1 | /* |
bbc27441 | 2 | * Copyright (C) 1996-2014 The Squid Software Foundation and contributors |
e25c139f | 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. | |
41462d93 | 7 | */ |
8 | ||
bbc27441 AJ |
9 | /* DEBUG: section 17 Request Forwarding */ |
10 | ||
582c2af2 | 11 | #include "squid.h" |
4bf68cfa | 12 | #include "AccessLogEntry.h" |
0dc8ffa5 | 13 | #include "acl/AclAddress.h" |
c0941a6a AR |
14 | #include "acl/FilledChecklist.h" |
15 | #include "acl/Gadgets.h" | |
5ae65581 | 16 | #include "anyp/PortCfg.h" |
25b481e6 | 17 | #include "CacheManager.h" |
602d9612 | 18 | #include "CachePeer.h" |
582c2af2 | 19 | #include "client_side.h" |
92ae4c86 | 20 | #include "clients/forward.h" |
f9b72e0c | 21 | #include "comm/Connection.h" |
aed188fd | 22 | #include "comm/ConnOpener.h" |
d841c88d | 23 | #include "comm/Loops.h" |
582c2af2 | 24 | #include "CommCalls.h" |
aa839030 | 25 | #include "errorpage.h" |
582c2af2 | 26 | #include "event.h" |
fc54b8d2 | 27 | #include "fd.h" |
aa839030 | 28 | #include "fde.h" |
eb13c21e | 29 | #include "FwdState.h" |
582c2af2 | 30 | #include "globals.h" |
fc54b8d2 | 31 | #include "gopher.h" |
bbaf2685 | 32 | #include "hier_code.h" |
fc54b8d2 | 33 | #include "http.h" |
924f73bc | 34 | #include "HttpReply.h" |
aa839030 | 35 | #include "HttpRequest.h" |
582c2af2 | 36 | #include "icmp/net_db.h" |
fc54b8d2 | 37 | #include "internal.h" |
582c2af2 | 38 | #include "ip/Intercept.h" |
425de4c8 | 39 | #include "ip/QosConfig.h" |
582c2af2 | 40 | #include "ip/tools.h" |
aa839030 | 41 | #include "MemObject.h" |
582c2af2 | 42 | #include "mgr/Registration.h" |
fc54b8d2 | 43 | #include "neighbors.h" |
781ce8ff | 44 | #include "pconn.h" |
e8dca475 | 45 | #include "PeerPoolMgr.h" |
cfd66529 | 46 | #include "PeerSelectState.h" |
4d5904f7 | 47 | #include "SquidConfig.h" |
aa839030 | 48 | #include "SquidTime.h" |
49 | #include "Store.h" | |
e87137f1 | 50 | #include "StoreClient.h" |
5eb529cb | 51 | #include "urn.h" |
fc54b8d2 | 52 | #include "whois.h" |
cb4f4424 | 53 | #if USE_OPENSSL |
2cef0ca6 AR |
54 | #include "ssl/cert_validate_message.h" |
55 | #include "ssl/Config.h" | |
4d16918e | 56 | #include "ssl/ErrorDetail.h" |
602d9612 | 57 | #include "ssl/helper.h" |
a23223bf | 58 | #include "ssl/PeerConnector.h" |
fd4624d7 | 59 | #include "ssl/ServerBump.h" |
602d9612 | 60 | #include "ssl/support.h" |
4db984be | 61 | #endif |
1a30fdf5 AJ |
62 | |
63 | #include <cerrno> | |
cfd66529 | 64 | |
6b679a01 | 65 | static PSC fwdPeerSelectionCompleteWrapper; |
575d05c4 | 66 | static CLCB fwdServerClosedWrapper; |
b6b6f466 | 67 | static CNCB fwdConnectDoneWrapper; |
68 | ||
8ddcc35d | 69 | static OBJH fwdStats; |
70 | ||
71 | #define MAX_FWD_STATS_IDX 9 | |
955394ce | 72 | static int FwdReplyCodes[MAX_FWD_STATS_IDX + 1][Http::scInvalidHeader + 1]; |
db1cd23c | 73 | |
e8dca475 | 74 | static PconnPool *fwdPconnPool = new PconnPool("server-side", NULL); |
b6b6f466 | 75 | CBDATA_CLASS_INIT(FwdState); |
781ce8ff | 76 | |
a23223bf CT |
77 | #if USE_OPENSSL |
78 | class FwdStatePeerAnswerDialer: public CallDialer, public Ssl::PeerConnector::CbDialer | |
79 | { | |
80 | public: | |
81 | typedef void (FwdState::*Method)(Ssl::PeerConnectorAnswer &); | |
82 | ||
83 | FwdStatePeerAnswerDialer(Method method, FwdState *fwd): | |
e2849af8 | 84 | method_(method), fwd_(fwd), answer_() {} |
a23223bf CT |
85 | |
86 | /* CallDialer API */ | |
87 | virtual bool canDial(AsyncCall &call) { return fwd_.valid(); } | |
88 | void dial(AsyncCall &call) { ((&(*fwd_))->*method_)(answer_); } | |
89 | virtual void print(std::ostream &os) const { | |
e2849af8 A |
90 | os << '(' << fwd_.get() << ", " << answer_ << ')'; |
91 | } | |
a23223bf CT |
92 | |
93 | /* Ssl::PeerConnector::CbDialer API */ | |
94 | virtual Ssl::PeerConnectorAnswer &answer() { return answer_; } | |
95 | ||
96 | private: | |
97 | Method method_; | |
98 | CbcPointer<FwdState> fwd_; | |
99 | Ssl::PeerConnectorAnswer answer_; | |
100 | }; | |
101 | #endif | |
102 | ||
429871db | 103 | void |
104 | FwdState::abort(void* d) | |
105 | { | |
106 | FwdState* fwd = (FwdState*)d; | |
6ecaf21a | 107 | Pointer tmp = fwd; // Grab a temporary pointer to keep the object alive during our scope. |
429871db | 108 | |
6b679a01 | 109 | if (Comm::IsConnOpen(fwd->serverConnection())) { |
e8dca475 | 110 | fwd->closeServerConnection("store entry aborted"); |
6dd9a2e4 AJ |
111 | } else { |
112 | debugs(17, 7, HERE << "store entry aborted; no connection to close"); | |
cff02fa6 | 113 | } |
c33a88ca | 114 | fwd->serverDestinations.clear(); |
429871db | 115 | fwd->self = NULL; |
116 | } | |
117 | ||
e8dca475 CT |
118 | void |
119 | FwdState::closeServerConnection(const char *reason) | |
120 | { | |
121 | debugs(17, 3, "because " << reason << "; " << serverConn); | |
122 | comm_remove_close_handler(serverConn->fd, fwdServerClosedWrapper, this); | |
123 | fwdPconnPool->noteUses(fd_table[serverConn->fd].pconn.uses); | |
124 | serverConn->close(); | |
125 | } | |
126 | ||
b6b6f466 | 127 | /**** PUBLIC INTERFACE ********************************************************/ |
c7f9eb6d | 128 | |
4bf68cfa | 129 | FwdState::FwdState(const Comm::ConnectionPointer &client, StoreEntry * e, HttpRequest * r, const AccessLogEntryPointer &alp): |
c901ed8c | 130 | al(alp) |
db1cd23c | 131 | { |
3157a816 | 132 | debugs(17, 2, HERE << "Forwarding client request " << client << ", url=" << e->url() ); |
b6b6f466 | 133 | entry = e; |
5c336a3b | 134 | clientConn = client; |
b248c2a3 AJ |
135 | request = r; |
136 | HTTPMSGLOCK(request); | |
bc81ee68 | 137 | pconnRace = raceImpossible; |
b6b6f466 | 138 | start_t = squid_curtime; |
00ae51e4 | 139 | serverDestinations.reserve(Config.forward_max_tries); |
1bfe9ade | 140 | e->lock("FwdState"); |
b6b6f466 | 141 | EBIT_SET(e->flags, ENTRY_FWD_HDR_WAIT); |
7a0fb323 | 142 | } |
143 | ||
144 | // Called once, right after object creation, when it is safe to set self | |
fc68f6b1 | 145 | void FwdState::start(Pointer aSelf) |
146 | { | |
7a0fb323 | 147 | // Protect ourselves from being destroyed when the only Server pointing |
148 | // to us is gone (while we expect to talk to more Servers later). | |
149 | // Once we set self, we are responsible for clearing it when we do not | |
150 | // expect to talk to any servers. | |
151 | self = aSelf; // refcounted | |
152 | ||
153 | // We hope that either the store entry aborts or peer is selected. | |
154 | // Otherwise we are going to leak our object. | |
34266cde | 155 | |
3900307b | 156 | entry->registerAbort(FwdState::abort, this); |
bfe4e2fe | 157 | |
32c32865 | 158 | #if STRICT_ORIGINAL_DST |
bfe4e2fe AJ |
159 | // Bug 3243: CVE 2009-0801 |
160 | // Bypass of browser same-origin access control in intercepted communication | |
161 | // To resolve this we must force DIRECT and only to the original client destination. | |
0d901ef4 | 162 | const bool isIntercepted = request && !request->flags.redirected && (request->flags.intercepted || request->flags.interceptTproxy); |
2962f8b8 AJ |
163 | const bool useOriginalDst = Config.onoff.client_dst_passthru || (request && !request->flags.hostVerified); |
164 | if (isIntercepted && useOriginalDst) { | |
d7ce0bcd | 165 | selectPeerForIntercepted(); |
7177edfb AJ |
166 | // 3.2 does not suppro re-wrapping inside CONNECT. |
167 | // our only alternative is to fake destination "found" and continue with the forwarding. | |
bfe4e2fe | 168 | startConnectionOrFail(); |
7177edfb | 169 | return; |
bfe4e2fe | 170 | } |
32c32865 AJ |
171 | #endif |
172 | ||
7177edfb | 173 | // do full route options selection |
d4806c91 | 174 | peerSelect(&serverDestinations, request, al, entry, fwdPeerSelectionCompleteWrapper, this); |
db1cd23c | 175 | } |
176 | ||
32c32865 | 177 | #if STRICT_ORIGINAL_DST |
d7ce0bcd AR |
178 | /// bypasses peerSelect() when dealing with intercepted requests |
179 | void | |
180 | FwdState::selectPeerForIntercepted() | |
181 | { | |
182 | // use pinned connection if available | |
183 | Comm::ConnectionPointer p; | |
693cb033 | 184 | if (ConnStateData *client = request->pinnedConnection()) { |
d7ce0bcd | 185 | p = client->validatePinnedConnection(request, NULL); |
693cb033 CT |
186 | if (Comm::IsConnOpen(p)) { |
187 | /* duplicate peerSelectPinned() effects */ | |
188 | p->peerType = PINNED; | |
189 | entry->ping_status = PING_DONE; /* Skip ICP */ | |
d7ce0bcd | 190 | |
693cb033 CT |
191 | debugs(17, 3, "reusing a pinned conn: " << *p); |
192 | serverDestinations.push_back(p); | |
193 | } else { | |
194 | debugs(17,2, "Pinned connection is not valid: " << p); | |
955394ce | 195 | ErrorState *anErr = new ErrorState(ERR_ZERO_SIZE_OBJECT, Http::scServiceUnavailable, request); |
693cb033 CT |
196 | fail(anErr); |
197 | } | |
198 | // Either use the valid pinned connection or fail if it is invalid. | |
199 | return; | |
d7ce0bcd AR |
200 | } |
201 | ||
7177edfb AJ |
202 | // use client original destination as second preferred choice |
203 | p = new Comm::Connection(); | |
204 | p->peerType = ORIGINAL_DST; | |
205 | p->remote = clientConn->local; | |
206 | getOutgoingAddress(request, p); | |
207 | ||
208 | debugs(17, 3, HERE << "using client original destination: " << *p); | |
d7ce0bcd AR |
209 | serverDestinations.push_back(p); |
210 | } | |
32c32865 | 211 | #endif |
d7ce0bcd | 212 | |
802a8c1d | 213 | void |
214 | FwdState::completed() | |
41462d93 | 215 | { |
e857372a | 216 | if (flags.forward_completed) { |
e0236918 | 217 | debugs(17, DBG_IMPORTANT, HERE << "FwdState::completed called on a completed request! Bad!"); |
fc68f6b1 | 218 | return; |
219 | } | |
220 | ||
e857372a | 221 | flags.forward_completed = true; |
802a8c1d | 222 | |
16b70e2a CT |
223 | request->hier.stopPeerClock(false); |
224 | ||
c4a88a3e CT |
225 | if (EBIT_TEST(entry->flags, ENTRY_ABORTED)) { |
226 | debugs(17, 3, HERE << "entry aborted"); | |
227 | return ; | |
228 | } | |
229 | ||
bc87dc25 | 230 | #if URL_CHECKSUM_DEBUG |
62e76326 | 231 | |
b6b6f466 | 232 | entry->mem_obj->checkUrlChecksum(); |
225644d7 | 233 | #endif |
62e76326 | 234 | |
b6b6f466 | 235 | if (entry->store_status == STORE_PENDING) { |
236 | if (entry->isEmpty()) { | |
a04b7e6e | 237 | if (!err) // we quit (e.g., fd closed) before an error or content |
955394ce | 238 | fail(new ErrorState(ERR_READ_ERROR, Http::scBadGateway, request)); |
b6b6f466 | 239 | assert(err); |
240 | errorAppendEntry(entry, err); | |
241 | err = NULL; | |
cb4f4424 | 242 | #if USE_OPENSSL |
2cef0ca6 AR |
243 | if (request->flags.sslPeek && request->clientConnectionManager.valid()) { |
244 | CallJobHere1(17, 4, request->clientConnectionManager, ConnStateData, | |
245 | ConnStateData::httpsPeeked, Comm::ConnectionPointer(NULL)); | |
246 | } | |
247 | #endif | |
62e76326 | 248 | } else { |
b6b6f466 | 249 | EBIT_CLR(entry->flags, ENTRY_FWD_HDR_WAIT); |
250 | entry->complete(); | |
d88e3c49 | 251 | entry->releaseRequest(); |
62e76326 | 252 | } |
f563eea9 | 253 | } |
62e76326 | 254 | |
b6b6f466 | 255 | if (storePendingNClients(entry) > 0) |
256 | assert(!EBIT_TEST(entry->flags, ENTRY_FWD_HDR_WAIT)); | |
62e76326 | 257 | |
802a8c1d | 258 | } |
259 | ||
260 | FwdState::~FwdState() | |
261 | { | |
262 | debugs(17, 3, HERE << "FwdState destructor starting"); | |
fc68f6b1 | 263 | |
802a8c1d | 264 | if (! flags.forward_completed) |
fc68f6b1 | 265 | completed(); |
802a8c1d | 266 | |
9d2760b6 AR |
267 | doneWithRetries(); |
268 | ||
6dd9f4bd | 269 | HTTPMSGUNLOCK(request); |
62e76326 | 270 | |
913524f0 | 271 | delete err; |
62e76326 | 272 | |
3900307b | 273 | entry->unregisterAbort(); |
429871db | 274 | |
1bfe9ade | 275 | entry->unlock("FwdState"); |
62e76326 | 276 | |
b6b6f466 | 277 | entry = NULL; |
62e76326 | 278 | |
e3a4aecc AJ |
279 | if (calls.connector != NULL) { |
280 | calls.connector->cancel("FwdState destructed"); | |
281 | calls.connector = NULL; | |
282 | } | |
283 | ||
e8dca475 CT |
284 | if (Comm::IsConnOpen(serverConn)) |
285 | closeServerConnection("~FwdState"); | |
fc68f6b1 | 286 | |
c33a88ca | 287 | serverDestinations.clear(); |
cfd66529 | 288 | |
b6b6f466 | 289 | debugs(17, 3, HERE << "FwdState destructor done"); |
290 | } | |
62e76326 | 291 | |
38413773 | 292 | /** |
b6b6f466 | 293 | * This is the entry point for client-side to start forwarding |
294 | * a transaction. It is a static method that may or may not | |
295 | * allocate a FwdState. | |
296 | */ | |
be0c6690 | 297 | void |
4bf68cfa | 298 | FwdState::Start(const Comm::ConnectionPointer &clientConn, StoreEntry *entry, HttpRequest *request, const AccessLogEntryPointer &al) |
b6b6f466 | 299 | { |
b50e327b | 300 | /** \note |
b6b6f466 | 301 | * client_addr == no_addr indicates this is an "internal" request |
302 | * from peer_digest.c, asn.c, netdb.c, etc and should always | |
303 | * be allowed. yuck, I know. | |
304 | */ | |
62e76326 | 305 | |
4dd643d5 | 306 | if ( Config.accessList.miss && !request->client_addr.isNoAddr() && |
4e3f4dc7 | 307 | !request->flags.internal && request->url.getScheme() != AnyP::PROTO_CACHE_OBJECT) { |
b50e327b | 308 | /** |
fbd3636b NR |
309 | * Check if this host is allowed to fetch MISSES from us (miss_access). |
310 | * Intentionally replace the src_addr automatically selected by the checklist code | |
311 | * we do NOT want the indirect client address to be tested here. | |
b6b6f466 | 312 | */ |
c0941a6a | 313 | ACLFilledChecklist ch(Config.accessList.miss, request, NULL); |
b6b6f466 | 314 | ch.src_addr = request->client_addr; |
2efeb0b7 | 315 | if (ch.fastCheck() == ACCESS_DENIED) { |
b6b6f466 | 316 | err_type page_id; |
9ce7856a | 317 | page_id = aclGetDenyInfoPage(&Config.denyInfoList, AclMatchedName, 1); |
b6b6f466 | 318 | |
319 | if (page_id == ERR_NONE) | |
320 | page_id = ERR_FORWARDING_DENIED; | |
321 | ||
955394ce | 322 | ErrorState *anErr = new ErrorState(page_id, Http::scForbidden, request); |
b6b6f466 | 323 | errorAppendEntry(entry, anErr); // frees anErr |
be0c6690 | 324 | return; |
b6b6f466 | 325 | } |
326 | } | |
327 | ||
cfd66529 | 328 | debugs(17, 3, HERE << "'" << entry->url() << "'"); |
f4ef658f | 329 | /* |
330 | * This seems like an odd place to bind mem_obj and request. | |
331 | * Might want to assert that request is NULL at this point | |
332 | */ | |
b248c2a3 AJ |
333 | entry->mem_obj->request = request; |
334 | HTTPMSGLOCK(entry->mem_obj->request); | |
b6b6f466 | 335 | #if URL_CHECKSUM_DEBUG |
336 | ||
337 | entry->mem_obj->checkUrlChecksum(); | |
338 | #endif | |
339 | ||
340 | if (shutting_down) { | |
341 | /* more yuck */ | |
955394ce | 342 | ErrorState *anErr = new ErrorState(ERR_SHUTTING_DOWN, Http::scServiceUnavailable, request); |
b6b6f466 | 343 | errorAppendEntry(entry, anErr); // frees anErr |
be0c6690 | 344 | return; |
6801f8a8 | 345 | } |
62e76326 | 346 | |
4e3f4dc7 AJ |
347 | if (request->flags.internal) { |
348 | debugs(17, 2, "calling internalStart() due to request flag"); | |
e37bd29b | 349 | internalStart(clientConn, request, entry); |
be0c6690 | 350 | return; |
4e3f4dc7 AJ |
351 | } |
352 | ||
353 | switch (request->url.getScheme()) { | |
b6b6f466 | 354 | |
39a19cb7 | 355 | case AnyP::PROTO_CACHE_OBJECT: |
4e3f4dc7 | 356 | debugs(17, 2, "calling CacheManager due to request scheme " << request->url.getScheme()); |
5c336a3b | 357 | CacheManager::GetInstance()->Start(clientConn, request, entry); |
be0c6690 | 358 | return; |
b6b6f466 | 359 | |
0c3d3f65 | 360 | case AnyP::PROTO_URN: |
b6b6f466 | 361 | urnStart(request, entry); |
be0c6690 | 362 | return; |
b6b6f466 | 363 | |
364 | default: | |
4bf68cfa | 365 | FwdState::Pointer fwd = new FwdState(clientConn, entry, request, al); |
7a0fb323 | 366 | fwd->start(fwd); |
be0c6690 | 367 | return; |
b6b6f466 | 368 | } |
369 | ||
370 | /* NOTREACHED */ | |
41462d93 | 371 | } |
372 | ||
4bf68cfa AR |
373 | void |
374 | FwdState::fwdStart(const Comm::ConnectionPointer &clientConn, StoreEntry *entry, HttpRequest *request) | |
375 | { | |
376 | // Hides AccessLogEntry.h from code that does not supply ALE anyway. | |
377 | Start(clientConn, entry, request, NULL); | |
378 | } | |
379 | ||
cfd66529 | 380 | void |
6b679a01 | 381 | FwdState::startConnectionOrFail() |
cfd66529 | 382 | { |
8652f8e7 | 383 | debugs(17, 3, HERE << entry->url()); |
cfd66529 | 384 | |
00ae51e4 | 385 | if (serverDestinations.size() > 0) { |
8652f8e7 AJ |
386 | // Ditch error page if it was created before. |
387 | // A new one will be created if there's another problem | |
913524f0 AJ |
388 | delete err; |
389 | err = NULL; | |
8652f8e7 AJ |
390 | |
391 | // Update the logging information about this new server connection. | |
392 | // Done here before anything else so the errors get logged for | |
393 | // this server link regardless of what happens when connecting to it. | |
394 | // IF sucessfuly connected this top destination will become the serverConnection(). | |
395 | request->hier.note(serverDestinations[0], request->GetHost()); | |
129fe2a1 | 396 | request->clearError(); |
8652f8e7 | 397 | |
cfd66529 AJ |
398 | connectStart(); |
399 | } else { | |
95b83010 CT |
400 | debugs(17, 3, HERE << "Connection failed: " << entry->url()); |
401 | if (!err) { | |
955394ce | 402 | ErrorState *anErr = new ErrorState(ERR_CANNOT_FORWARD, Http::scInternalServerError, request); |
95b83010 | 403 | fail(anErr); |
8652f8e7 | 404 | } // else use actual error from last connection attempt |
cfd66529 AJ |
405 | self = NULL; // refcounted |
406 | } | |
407 | } | |
408 | ||
b6b6f466 | 409 | void |
410 | FwdState::fail(ErrorState * errorState) | |
411 | { | |
9b769c67 | 412 | debugs(17, 3, err_type_str[errorState->type] << " \"" << Http::StatusCodeString(errorState->httpStatus) << "\"\n\t" << entry->url()); |
b6b6f466 | 413 | |
913524f0 | 414 | delete err; |
b6b6f466 | 415 | err = errorState; |
416 | ||
b248c2a3 AJ |
417 | if (!errorState->request) { |
418 | errorState->request = request; | |
419 | HTTPMSGLOCK(errorState->request); | |
420 | } | |
64b66b76 | 421 | |
693cb033 CT |
422 | if (err->type != ERR_ZERO_SIZE_OBJECT) |
423 | return; | |
424 | ||
425 | if (pconnRace == racePossible) { | |
bc81ee68 AR |
426 | debugs(17, 5, HERE << "pconn race happened"); |
427 | pconnRace = raceHappened; | |
428 | } | |
693cb033 CT |
429 | |
430 | if (ConnStateData *pinned_connection = request->pinnedConnection()) { | |
431 | pinned_connection->pinning.zeroReply = true; | |
432 | flags.dont_retry = true; // we want to propagate failure to the client | |
433 | debugs(17, 4, "zero reply on pinned connection"); | |
434 | } | |
b6b6f466 | 435 | } |
436 | ||
38413773 | 437 | /** |
b6b6f466 | 438 | * Frees fwdState without closing FD or generating an abort |
439 | */ | |
440 | void | |
00ae51e4 | 441 | FwdState::unregister(Comm::ConnectionPointer &conn) |
5229395c AJ |
442 | { |
443 | debugs(17, 3, HERE << entry->url() ); | |
444 | assert(serverConnection() == conn); | |
6b679a01 | 445 | assert(Comm::IsConnOpen(conn)); |
5229395c | 446 | comm_remove_close_handler(conn->fd, fwdServerClosedWrapper, this); |
00ae51e4 | 447 | serverConn = NULL; |
5229395c AJ |
448 | } |
449 | ||
450 | // Legacy method to be removed in favor of the above as soon as possible | |
451 | void | |
b6b6f466 | 452 | FwdState::unregister(int fd) |
453 | { | |
5229395c AJ |
454 | debugs(17, 3, HERE << entry->url() ); |
455 | assert(fd == serverConnection()->fd); | |
00ae51e4 | 456 | unregister(serverConn); |
b6b6f466 | 457 | } |
458 | ||
38413773 | 459 | /** |
b6b6f466 | 460 | * server-side modules call fwdComplete() when they are done |
461 | * downloading an object. Then, we either 1) re-forward the | |
462 | * request somewhere else if needed, or 2) call storeComplete() | |
463 | * to finish it off | |
464 | */ | |
465 | void | |
466 | FwdState::complete() | |
467 | { | |
9b769c67 | 468 | debugs(17, 3, HERE << entry->url() << "\n\tstatus " << entry->getReply()->sline.status()); |
b6b6f466 | 469 | #if URL_CHECKSUM_DEBUG |
470 | ||
471 | entry->mem_obj->checkUrlChecksum(); | |
472 | #endif | |
473 | ||
9b769c67 | 474 | logReplyStatus(n_tries, entry->getReply()->sline.status()); |
b6b6f466 | 475 | |
476 | if (reforward()) { | |
9b769c67 | 477 | debugs(17, 3, HERE << "re-forwarding " << entry->getReply()->sline.status() << " " << entry->url()); |
b6b6f466 | 478 | |
6b679a01 | 479 | if (Comm::IsConnOpen(serverConn)) |
00ae51e4 | 480 | unregister(serverConn); |
b6b6f466 | 481 | |
cfd66529 AJ |
482 | entry->reset(); |
483 | ||
8652f8e7 | 484 | // drop the last path off the selection list. try the next one. |
523c3de3 | 485 | serverDestinations.erase(serverDestinations.begin()); |
8652f8e7 AJ |
486 | startConnectionOrFail(); |
487 | ||
b6b6f466 | 488 | } else { |
6b679a01 | 489 | if (Comm::IsConnOpen(serverConn)) |
9b769c67 | 490 | debugs(17, 3, HERE << "server FD " << serverConnection()->fd << " not re-forwarding status " << entry->getReply()->sline.status()); |
6b679a01 | 491 | else |
9b769c67 | 492 | debugs(17, 3, HERE << "server (FD closed) not re-forwarding status " << entry->getReply()->sline.status()); |
9e5c22cf AJ |
493 | EBIT_CLR(entry->flags, ENTRY_FWD_HDR_WAIT); |
494 | entry->complete(); | |
fc68f6b1 | 495 | |
6b679a01 | 496 | if (!Comm::IsConnOpen(serverConn)) |
fc68f6b1 | 497 | completed(); |
498 | ||
7a0fb323 | 499 | self = NULL; // refcounted |
b6b6f466 | 500 | } |
501 | } | |
502 | ||
b6b6f466 | 503 | /**** CALLBACK WRAPPERS ************************************************************/ |
504 | ||
505 | static void | |
a37fdd8a | 506 | fwdPeerSelectionCompleteWrapper(Comm::ConnectionList * unused, ErrorState *err, void *data) |
b6b6f466 | 507 | { |
508 | FwdState *fwd = (FwdState *) data; | |
a37fdd8a AJ |
509 | if (err) |
510 | fwd->fail(err); | |
6b679a01 | 511 | fwd->startConnectionOrFail(); |
b6b6f466 | 512 | } |
513 | ||
514 | static void | |
575d05c4 | 515 | fwdServerClosedWrapper(const CommCloseCbParams ¶ms) |
b6b6f466 | 516 | { |
575d05c4 AJ |
517 | FwdState *fwd = (FwdState *)params.data; |
518 | fwd->serverClosed(params.fd); | |
b6b6f466 | 519 | } |
520 | ||
cfd66529 | 521 | void |
c8407295 | 522 | fwdConnectDoneWrapper(const Comm::ConnectionPointer &conn, Comm::Flag status, int xerrno, void *data) |
b6b6f466 | 523 | { |
524 | FwdState *fwd = (FwdState *) data; | |
aed188fd | 525 | fwd->connectDone(conn, status, xerrno); |
b6b6f466 | 526 | } |
527 | ||
528 | /**** PRIVATE *****************************************************************/ | |
529 | ||
545782b8 | 530 | /* |
531 | * FwdState::checkRetry | |
26ac0430 | 532 | * |
545782b8 | 533 | * Return TRUE if the request SHOULD be retried. This method is |
534 | * called when the HTTP connection fails, or when the connection | |
535 | * is closed before server-side read the end of HTTP headers. | |
536 | */ | |
b6b6f466 | 537 | bool |
538 | FwdState::checkRetry() | |
68bd6892 | 539 | { |
d8fd0f18 | 540 | if (shutting_down) |
b6b6f466 | 541 | return false; |
62e76326 | 542 | |
9d2760b6 AR |
543 | if (!self) { // we have aborted before the server called us back |
544 | debugs(17, 5, HERE << "not retrying because of earlier abort"); | |
545 | // we will be destroyed when the server clears its Pointer to us | |
546 | return false; | |
547 | } | |
548 | ||
b6b6f466 | 549 | if (entry->store_status != STORE_PENDING) |
550 | return false; | |
62e76326 | 551 | |
b6b6f466 | 552 | if (!entry->isEmpty()) |
553 | return false; | |
62e76326 | 554 | |
23a1e39c | 555 | if (n_tries > Config.forward_max_tries) |
b6b6f466 | 556 | return false; |
4ed0e075 | 557 | |
b6b6f466 | 558 | if (squid_curtime - start_t > Config.Timeout.forward) |
559 | return false; | |
62e76326 | 560 | |
b6b6f466 | 561 | if (flags.dont_retry) |
562 | return false; | |
62e76326 | 563 | |
3b9899f7 AR |
564 | if (request->bodyNibbled()) |
565 | return false; | |
566 | ||
0bbd5532 AJ |
567 | // NP: not yet actually connected anywhere. retry is safe. |
568 | if (!flags.connected_okay) | |
569 | return true; | |
570 | ||
5d4989a8 | 571 | if (!checkRetriable()) |
572 | return false; | |
573 | ||
b6b6f466 | 574 | return true; |
68bd6892 | 575 | } |
576 | ||
545782b8 | 577 | /* |
578 | * FwdState::checkRetriable | |
579 | * | |
580 | * Return TRUE if this is the kind of request that can be retried | |
581 | * after a failure. If the request is not retriable then we don't | |
582 | * want to risk sending it on a persistent connection. Instead we'll | |
583 | * force it to go on a new HTTP connection. | |
584 | */ | |
b6b6f466 | 585 | bool |
586 | FwdState::checkRetriable() | |
cb928909 | 587 | { |
ccbcff0e AR |
588 | // Optimize: A compliant proxy may retry PUTs, but Squid lacks the [rather |
589 | // complicated] code required to protect the PUT request body from being | |
590 | // nibbled during the first try. Thus, Squid cannot retry some PUTs today. | |
591 | if (request->body_pipe != NULL) | |
592 | return false; | |
593 | ||
c2a7cefd AJ |
594 | // RFC2616 9.1 Safe and Idempotent Methods |
595 | return (request->method.isHttpSafe() || request->method.isIdempotent()); | |
cb928909 | 596 | } |
597 | ||
b6b6f466 | 598 | void |
599 | FwdState::serverClosed(int fd) | |
910169e5 | 600 | { |
8ed21336 | 601 | // XXX: fd is often -1 here |
e8dca475 | 602 | debugs(17, 2, "FD " << fd << " " << entry->url() << " after " << |
8ed21336 AR |
603 | (fd >= 0 ? fd_table[fd].pconn.uses : -1) << " requests"); |
604 | if (fd >= 0 && serverConnection()->fd == fd) | |
e8dca475 | 605 | fwdPconnPool->noteUses(fd_table[fd].pconn.uses); |
3e8c047e | 606 | retryOrBail(); |
607 | } | |
608 | ||
609 | void | |
26ac0430 AJ |
610 | FwdState::retryOrBail() |
611 | { | |
b6b6f466 | 612 | if (checkRetry()) { |
cfd66529 | 613 | debugs(17, 3, HERE << "re-forwarding (" << n_tries << " tries, " << (squid_curtime - start_t) << " secs)"); |
bc81ee68 AR |
614 | // we should retry the same destination if it failed due to pconn race |
615 | if (pconnRace == raceHappened) | |
616 | debugs(17, 4, HERE << "retrying the same destination"); | |
617 | else | |
b181c1df | 618 | serverDestinations.erase(serverDestinations.begin()); // last one failed. try another. |
8652f8e7 AJ |
619 | startConnectionOrFail(); |
620 | return; | |
d8fd0f18 | 621 | } |
62e76326 | 622 | |
9d2760b6 AR |
623 | // TODO: should we call completed() here and move doneWithRetries there? |
624 | doneWithRetries(); | |
625 | ||
16b70e2a CT |
626 | request->hier.stopPeerClock(false); |
627 | ||
9d2760b6 | 628 | if (self != NULL && !err && shutting_down) { |
955394ce | 629 | ErrorState *anErr = new ErrorState(ERR_SHUTTING_DOWN, Http::scServiceUnavailable, request); |
f01d4b80 | 630 | errorAppendEntry(entry, anErr); |
f563eea9 | 631 | } |
62e76326 | 632 | |
b6b6f466 | 633 | self = NULL; // refcounted |
910169e5 | 634 | } |
635 | ||
9d2760b6 AR |
636 | // If the Server quits before nibbling at the request body, the body sender |
637 | // will not know (so that we can retry). Call this if we will not retry. We | |
638 | // will notify the sender so that it does not get stuck waiting for space. | |
639 | void | |
640 | FwdState::doneWithRetries() | |
641 | { | |
642 | if (request && request->body_pipe != NULL) | |
643 | request->body_pipe->expectNoConsumption(); | |
644 | } | |
645 | ||
3e8c047e | 646 | // called by the server that failed after calling unregister() |
647 | void | |
648 | FwdState::handleUnregisteredServerEnd() | |
649 | { | |
cfd66529 | 650 | debugs(17, 2, HERE << "self=" << self << " err=" << err << ' ' << entry->url()); |
6b679a01 | 651 | assert(!Comm::IsConnOpen(serverConn)); |
3e8c047e | 652 | retryOrBail(); |
653 | } | |
654 | ||
b6b6f466 | 655 | void |
c8407295 | 656 | FwdState::connectDone(const Comm::ConnectionPointer &conn, Comm::Flag status, int xerrno) |
41462d93 | 657 | { |
c8407295 | 658 | if (status != Comm::OK) { |
9c8a6c3b | 659 | ErrorState *const anErr = makeConnectingError(ERR_CONNECT_FAIL); |
b6b6f466 | 660 | anErr->xerrno = xerrno; |
b6b6f466 | 661 | fail(anErr); |
62e76326 | 662 | |
2f538b78 | 663 | /* it might have been a timeout with a partially open link */ |
00ae51e4 AJ |
664 | if (conn != NULL) { |
665 | if (conn->getPeer()) | |
666 | peerConnectFailed(conn->getPeer()); | |
62e76326 | 667 | |
80463bb4 | 668 | conn->close(); |
2f538b78 | 669 | } |
aed188fd | 670 | retryOrBail(); |
2f538b78 AJ |
671 | return; |
672 | } | |
62e76326 | 673 | |
00ae51e4 | 674 | serverConn = conn; |
3b9899f7 | 675 | flags.connected_okay = true; |
00ae51e4 | 676 | |
f01d4b80 | 677 | debugs(17, 3, HERE << serverConnection() << ": '" << entry->url() << "'" ); |
62e76326 | 678 | |
5229395c | 679 | comm_add_close_handler(serverConnection()->fd, fwdServerClosedWrapper, this); |
2f538b78 | 680 | |
5229395c AJ |
681 | if (serverConnection()->getPeer()) |
682 | peerConnectSucceded(serverConnection()->getPeer()); | |
2f538b78 | 683 | |
cb4f4424 | 684 | #if USE_OPENSSL |
693cb033 | 685 | if (!request->flags.pinned) { |
39322eba | 686 | if ((serverConnection()->getPeer() && serverConnection()->getPeer()->use_ssl) || |
4e3f4dc7 | 687 | (!serverConnection()->getPeer() && request->url.getScheme() == AnyP::PROTO_HTTPS) || |
37276dbb | 688 | request->flags.sslPeek) { |
a23223bf CT |
689 | |
690 | HttpRequest::Pointer requestPointer = request; | |
691 | AsyncCall::Pointer callback = asyncCall(17,4, | |
e2849af8 A |
692 | "FwdState::ConnectedToPeer", |
693 | FwdStatePeerAnswerDialer(&FwdState::connectedToPeer, this)); | |
8aec3e1b CT |
694 | // Use positive timeout when less than one second is left. |
695 | const time_t sslNegotiationTimeout = max(static_cast<time_t>(1), timeLeft()); | |
a23223bf | 696 | Ssl::PeerConnector *connector = |
d1f3d8f8 | 697 | new Ssl::PeerConnector(requestPointer, serverConnection(), clientConn, callback, sslNegotiationTimeout); |
a23223bf | 698 | AsyncJob::Start(connector); // will call our callback |
39322eba J |
699 | return; |
700 | } | |
41462d93 | 701 | } |
2f538b78 AJ |
702 | #endif |
703 | ||
92ae4c86 AR |
704 | // should reach ConnStateData before the dispatched Client job starts |
705 | CallJobHere1(17, 4, request->clientConnectionManager, ConnStateData, | |
706 | ConnStateData::notePeerConnection, serverConnection()); | |
434a79b0 | 707 | |
2f538b78 | 708 | dispatch(); |
41462d93 | 709 | } |
710 | ||
a23223bf CT |
711 | #if USE_OPENSSL |
712 | void | |
713 | FwdState::connectedToPeer(Ssl::PeerConnectorAnswer &answer) | |
714 | { | |
715 | if (ErrorState *error = answer.error.get()) { | |
716 | fail(error); | |
717 | answer.error.clear(); // preserve error for errorSendComplete() | |
718 | self = NULL; | |
719 | return; | |
720 | } | |
721 | ||
722 | dispatch(); | |
723 | } | |
724 | #endif | |
725 | ||
b6b6f466 | 726 | void |
727 | FwdState::connectTimeout(int fd) | |
41462d93 | 728 | { |
bf8fe701 | 729 | debugs(17, 2, "fwdConnectTimeout: FD " << fd << ": '" << entry->url() << "'" ); |
6b679a01 AJ |
730 | assert(serverDestinations[0] != NULL); |
731 | assert(fd == serverDestinations[0]->fd); | |
62e76326 | 732 | |
528b2c61 | 733 | if (entry->isEmpty()) { |
f11c8e2f | 734 | ErrorState *anErr = new ErrorState(ERR_CONNECT_FAIL, Http::scGatewayTimeout, request); |
b6b6f466 | 735 | anErr->xerrno = ETIMEDOUT; |
736 | fail(anErr); | |
62e76326 | 737 | |
cfd66529 | 738 | /* This marks the peer DOWN ... */ |
6b679a01 AJ |
739 | if (serverDestinations[0]->getPeer()) |
740 | peerConnectFailed(serverDestinations[0]->getPeer()); | |
41462d93 | 741 | } |
62e76326 | 742 | |
6b679a01 AJ |
743 | if (Comm::IsConnOpen(serverDestinations[0])) { |
744 | serverDestinations[0]->close(); | |
746beefe | 745 | } |
41462d93 | 746 | } |
747 | ||
8aec3e1b CT |
748 | time_t |
749 | FwdState::timeLeft() const | |
41462d93 | 750 | { |
cfd66529 AJ |
751 | /* connection timeout */ |
752 | int ctimeout; | |
6b679a01 AJ |
753 | if (serverDestinations[0]->getPeer()) { |
754 | ctimeout = serverDestinations[0]->getPeer()->connect_timeout > 0 ? | |
755 | serverDestinations[0]->getPeer()->connect_timeout : Config.Timeout.peer_connect; | |
db1cd23c | 756 | } else { |
62e76326 | 757 | ctimeout = Config.Timeout.connect; |
db1cd23c | 758 | } |
62e76326 | 759 | |
cfd66529 AJ |
760 | /* calculate total forwarding timeout ??? */ |
761 | int ftimeout = Config.Timeout.forward - (squid_curtime - start_t); | |
777831e0 | 762 | if (ftimeout < 0) |
763 | ftimeout = 5; | |
764 | ||
765 | if (ftimeout < ctimeout) | |
8aec3e1b CT |
766 | return (time_t)ftimeout; |
767 | else | |
768 | return (time_t)ctimeout; | |
769 | } | |
770 | ||
771 | /** | |
772 | * Called after forwarding path selection (via peer select) has taken place | |
773 | * and whenever forwarding needs to attempt a new connection (routing failover). | |
774 | * We have a vector of possible localIP->remoteIP paths now ready to start being connected. | |
775 | */ | |
776 | void | |
777 | FwdState::connectStart() | |
778 | { | |
779 | assert(serverDestinations.size() > 0); | |
780 | ||
781 | debugs(17, 3, "fwdConnectStart: " << entry->url()); | |
782 | ||
16b70e2a | 783 | request->hier.startPeerClock(); |
777831e0 | 784 | |
450fe1cb | 785 | if (serverDestinations[0]->getPeer() && request->flags.sslBumped) { |
2cf8425b | 786 | debugs(50, 4, "fwdConnectStart: Ssl bumped connections through parent proxy are not allowed"); |
955394ce | 787 | ErrorState *anErr = new ErrorState(ERR_CANNOT_FORWARD, Http::scServiceUnavailable, request); |
b68415a1 CT |
788 | fail(anErr); |
789 | self = NULL; // refcounted | |
790 | return; | |
985bfe6b | 791 | } |
d67acb4e | 792 | |
e857372a | 793 | request->flags.pinned = false; // XXX: what if the ConnStateData set this to flag existing credentials? |
2efeb0b7 AJ |
794 | // XXX: answer: the peer selection *should* catch it and give us only the pinned peer. so we reverse the =0 step below. |
795 | // XXX: also, logs will now lie if pinning is broken and leads to an error message. | |
6b679a01 | 796 | if (serverDestinations[0]->peerType == PINNED) { |
26ac0430 | 797 | ConnStateData *pinned_connection = request->pinnedConnection(); |
693cb033 | 798 | debugs(17,7, "pinned peer connection: " << pinned_connection); |
bc81ee68 AR |
799 | // pinned_connection may become nil after a pconn race |
800 | if (pinned_connection) | |
89b1d7a2 | 801 | serverConn = pinned_connection->borrowPinnedConnection(request, serverDestinations[0]->getPeer()); |
bc81ee68 AR |
802 | else |
803 | serverConn = NULL; | |
e3a4aecc | 804 | if (Comm::IsConnOpen(serverConn)) { |
7ac40923 | 805 | pinned_connection->stopPinnedConnectionMonitoring(); |
3b9899f7 | 806 | flags.connected_okay = true; |
95dc7ff4 | 807 | ++n_tries; |
e857372a | 808 | request->flags.pinned = true; |
35894b9a | 809 | request->hier.note(serverConn, pinned_connection->pinning.host); |
d67acb4e | 810 | if (pinned_connection->pinnedAuth()) |
e857372a | 811 | request->flags.auth = true; |
23211a9f | 812 | comm_add_close_handler(serverConn->fd, fwdServerClosedWrapper, this); |
c6f168c1 CT |
813 | |
814 | /* Update server side TOS and Netfilter mark on the connection. */ | |
815 | if (Ip::Qos::TheConfig.isAclTosActive()) { | |
816 | debugs(17, 3, HERE << "setting tos for pinned connection to " << (int)serverConn->tos ); | |
817 | serverConn->tos = GetTosToServer(request); | |
818 | Ip::Qos::setSockTos(serverConn, serverConn->tos); | |
819 | } | |
820 | #if SO_MARK | |
821 | if (Ip::Qos::TheConfig.isAclNfmarkActive()) { | |
822 | serverConn->nfmark = GetNfmarkToServer(request); | |
823 | Ip::Qos::setSockNfmark(serverConn, serverConn->nfmark); | |
824 | } | |
825 | #endif | |
826 | ||
bc81ee68 AR |
827 | // the server may close the pinned connection before this request |
828 | pconnRace = racePossible; | |
6b679a01 | 829 | dispatch(); |
d67acb4e AJ |
830 | return; |
831 | } | |
693cb033 | 832 | // Pinned connection failure. |
85563fd9 | 833 | debugs(17,2,HERE << "Pinned connection failed: " << pinned_connection); |
955394ce | 834 | ErrorState *anErr = new ErrorState(ERR_ZERO_SIZE_OBJECT, Http::scServiceUnavailable, request); |
693cb033 CT |
835 | fail(anErr); |
836 | self = NULL; // refcounted | |
837 | return; | |
26ac0430 | 838 | } |
d67acb4e | 839 | |
642a305c | 840 | // Use pconn to avoid opening a new connection. |
7a150c71 AJ |
841 | const char *host = NULL; |
842 | if (!serverDestinations[0]->getPeer()) | |
06093389 | 843 | host = request->GetHost(); |
bc81ee68 AR |
844 | |
845 | Comm::ConnectionPointer temp; | |
846 | // Avoid pconns after races so that the same client does not suffer twice. | |
847 | // This does not increase the total number of connections because we just | |
848 | // closed the connection that failed the race. And re-pinning assumes this. | |
849 | if (pconnRace != raceHappened) | |
e8dca475 | 850 | temp = pconnPop(serverDestinations[0], host); |
bbf706ff | 851 | |
bc81ee68 AR |
852 | const bool openedPconn = Comm::IsConnOpen(temp); |
853 | pconnRace = openedPconn ? racePossible : raceImpossible; | |
cfd66529 | 854 | |
6b679a01 | 855 | // if we found an open persistent connection to use. use it. |
bc81ee68 | 856 | if (openedPconn) { |
80463bb4 | 857 | serverConn = temp; |
3b9899f7 | 858 | flags.connected_okay = true; |
642a305c | 859 | debugs(17, 3, HERE << "reusing pconn " << serverConnection()); |
95dc7ff4 | 860 | ++n_tries; |
4ed0e075 | 861 | |
5229395c | 862 | comm_add_close_handler(serverConnection()->fd, fwdServerClosedWrapper, this); |
b5523edc AJ |
863 | |
864 | /* Update server side TOS and Netfilter mark on the connection. */ | |
865 | if (Ip::Qos::TheConfig.isAclTosActive()) { | |
f123f5e9 CT |
866 | const tos_t tos = GetTosToServer(request); |
867 | Ip::Qos::setSockTos(temp, tos); | |
b5523edc AJ |
868 | } |
869 | #if SO_MARK | |
870 | if (Ip::Qos::TheConfig.isAclNfmarkActive()) { | |
f123f5e9 CT |
871 | const nfmark_t nfmark = GetNfmarkToServer(request); |
872 | Ip::Qos::setSockNfmark(temp, nfmark); | |
b5523edc AJ |
873 | } |
874 | #endif | |
875 | ||
c8ceec27 | 876 | dispatch(); |
c8ceec27 | 877 | return; |
41462d93 | 878 | } |
62e76326 | 879 | |
bc81ee68 AR |
880 | // We will try to open a new connection, possibly to the same destination. |
881 | // We reset serverDestinations[0] in case we are using it again because | |
882 | // ConnOpener modifies its destination argument. | |
4dd643d5 | 883 | serverDestinations[0]->local.port(0); |
bc81ee68 AR |
884 | serverConn = NULL; |
885 | ||
bc87dc25 | 886 | #if URL_CHECKSUM_DEBUG |
b6b6f466 | 887 | entry->mem_obj->checkUrlChecksum(); |
bc87dc25 | 888 | #endif |
62e76326 | 889 | |
6ee88490 | 890 | GetMarkingsToServer(request, *serverDestinations[0]); |
b5523edc | 891 | |
e3a4aecc | 892 | calls.connector = commCbCall(17,3, "fwdConnectDoneWrapper", CommConnectCbPtrFun(fwdConnectDoneWrapper, this)); |
8aec3e1b | 893 | Comm::ConnOpener *cs = new Comm::ConnOpener(serverDestinations[0], calls.connector, timeLeft()); |
7a150c71 AJ |
894 | if (host) |
895 | cs->setHost(host); | |
855150a4 | 896 | AsyncJob::Start(cs); |
41462d93 | 897 | } |
898 | ||
b6b6f466 | 899 | void |
900 | FwdState::dispatch() | |
41462d93 | 901 | { |
7f06a3d8 | 902 | debugs(17, 3, clientConn << ": Fetching " << request->method << ' ' << entry->url()); |
e0ebe27c | 903 | /* |
904 | * Assert that server_fd is set. This is to guarantee that fwdState | |
905 | * is attached to something and will be deallocated when server_fd | |
906 | * is closed. | |
907 | */ | |
6b679a01 | 908 | assert(Comm::IsConnOpen(serverConn)); |
62e76326 | 909 | |
5229395c | 910 | fd_note(serverConnection()->fd, entry->url()); |
62e76326 | 911 | |
e8dca475 | 912 | fd_table[serverConnection()->fd].noteUse(); |
62e76326 | 913 | |
a7ad6e4e | 914 | /*assert(!EBIT_TEST(entry->flags, ENTRY_DISPATCHED)); */ |
915 | assert(entry->ping_status != PING_WAITING); | |
62e76326 | 916 | |
1bfe9ade | 917 | assert(entry->locked()); |
62e76326 | 918 | |
a7ad6e4e | 919 | EBIT_SET(entry->flags, ENTRY_DISPATCHED); |
62e76326 | 920 | |
cc192b50 | 921 | netdbPingSite(request->GetHost()); |
62e76326 | 922 | |
425de4c8 | 923 | /* Retrieves remote server TOS or MARK value, and stores it as part of the |
7172612f | 924 | * original client request FD object. It is later used to forward |
425de4c8 | 925 | * remote server's TOS/MARK in the response to the client in case of a MISS. |
7172612f | 926 | */ |
425de4c8 | 927 | if (Ip::Qos::TheConfig.isHitNfmarkActive()) { |
b5523edc AJ |
928 | if (Comm::IsConnOpen(clientConn) && Comm::IsConnOpen(serverConnection())) { |
929 | fde * clientFde = &fd_table[clientConn->fd]; // XXX: move the fd_table access into Ip::Qos | |
425de4c8 | 930 | /* Get the netfilter mark for the connection */ |
b5523edc | 931 | Ip::Qos::getNfmarkFromServer(serverConnection(), clientFde); |
425de4c8 AJ |
932 | } |
933 | } | |
934 | ||
935 | #if _SQUID_LINUX_ | |
936 | /* Bug 2537: The TOS forward part of QOS only applies to patched Linux kernels. */ | |
937 | if (Ip::Qos::TheConfig.isHitTosActive()) { | |
b5523edc AJ |
938 | if (Comm::IsConnOpen(clientConn)) { |
939 | fde * clientFde = &fd_table[clientConn->fd]; // XXX: move the fd_table access into Ip::Qos | |
425de4c8 | 940 | /* Get the TOS value for the packet */ |
b5523edc | 941 | Ip::Qos::getTosFromServer(serverConnection(), clientFde); |
7172612f | 942 | } |
26ac0430 | 943 | } |
7172612f AJ |
944 | #endif |
945 | ||
cb4f4424 | 946 | #if USE_OPENSSL |
2c065fc8 | 947 | if (request->flags.sslPeek) { |
d7ce0bcd | 948 | CallJobHere1(17, 4, request->clientConnectionManager, ConnStateData, |
061bbdec | 949 | ConnStateData::httpsPeeked, serverConnection()); |
d7ce0bcd AR |
950 | unregister(serverConn); // async call owns it now |
951 | complete(); // destroys us | |
952 | return; | |
061bbdec | 953 | } |
d7ce0bcd AR |
954 | #endif |
955 | ||
5229395c | 956 | if (serverConnection()->getPeer() != NULL) { |
95dc7ff4 | 957 | ++ serverConnection()->getPeer()->stats.fetches; |
5229395c AJ |
958 | request->peer_login = serverConnection()->getPeer()->login; |
959 | request->peer_domain = serverConnection()->getPeer()->domain; | |
b6b6f466 | 960 | httpStart(this); |
41462d93 | 961 | } else { |
2c065fc8 | 962 | assert(!request->flags.sslPeek); |
b6b6f466 | 963 | request->peer_login = NULL; |
964 | request->peer_domain = NULL; | |
62e76326 | 965 | |
4e3f4dc7 | 966 | switch (request->url.getScheme()) { |
cb4f4424 | 967 | #if USE_OPENSSL |
62e76326 | 968 | |
0c3d3f65 | 969 | case AnyP::PROTO_HTTPS: |
b6b6f466 | 970 | httpStart(this); |
62e76326 | 971 | break; |
a7ad6e4e | 972 | #endif |
62e76326 | 973 | |
0c3d3f65 | 974 | case AnyP::PROTO_HTTP: |
b6b6f466 | 975 | httpStart(this); |
62e76326 | 976 | break; |
977 | ||
0c3d3f65 | 978 | case AnyP::PROTO_GOPHER: |
b6b6f466 | 979 | gopherStart(this); |
62e76326 | 980 | break; |
981 | ||
0c3d3f65 | 982 | case AnyP::PROTO_FTP: |
92ae4c86 | 983 | if (request->flags.ftpNative) |
5517260a | 984 | Ftp::StartRelay(this); |
434a79b0 | 985 | else |
5517260a | 986 | Ftp::StartGateway(this); |
62e76326 | 987 | break; |
988 | ||
39a19cb7 | 989 | case AnyP::PROTO_CACHE_OBJECT: |
62e76326 | 990 | |
0c3d3f65 | 991 | case AnyP::PROTO_URN: |
62e76326 | 992 | fatal_dump("Should never get here"); |
993 | break; | |
994 | ||
0c3d3f65 | 995 | case AnyP::PROTO_WHOIS: |
b6b6f466 | 996 | whoisStart(this); |
62e76326 | 997 | break; |
998 | ||
0c3d3f65 | 999 | case AnyP::PROTO_WAIS: /* Not implemented */ |
fc68f6b1 | 1000 | |
62e76326 | 1001 | default: |
7be06178 | 1002 | debugs(17, DBG_IMPORTANT, "WARNING: Cannot retrieve '" << entry->url() << "'."); |
955394ce | 1003 | ErrorState *anErr = new ErrorState(ERR_UNSUP_REQ, Http::scBadRequest, request); |
b6b6f466 | 1004 | fail(anErr); |
7be06178 | 1005 | // Set the dont_retry flag because this is not a transient (network) error. |
e857372a | 1006 | flags.dont_retry = true; |
6b679a01 | 1007 | if (Comm::IsConnOpen(serverConn)) { |
00ae51e4 | 1008 | serverConn->close(); |
746beefe | 1009 | } |
62e76326 | 1010 | break; |
1011 | } | |
41462d93 | 1012 | } |
1013 | } | |
1014 | ||
545782b8 | 1015 | /* |
1016 | * FwdState::reforward | |
1017 | * | |
1018 | * returns TRUE if the transaction SHOULD be re-forwarded to the | |
8bbb16e3 | 1019 | * next choice in the serverDestinations list. This method is called when |
545782b8 | 1020 | * server-side communication completes normally, or experiences |
1021 | * some error after receiving the end of HTTP headers. | |
1022 | */ | |
b6b6f466 | 1023 | int |
1024 | FwdState::reforward() | |
db1cd23c | 1025 | { |
b6b6f466 | 1026 | StoreEntry *e = entry; |
c4a88a3e CT |
1027 | |
1028 | if (EBIT_TEST(e->flags, ENTRY_ABORTED)) { | |
1029 | debugs(17, 3, HERE << "entry aborted"); | |
1030 | return 0; | |
1031 | } | |
1032 | ||
db1cd23c | 1033 | assert(e->store_status == STORE_PENDING); |
1034 | assert(e->mem_obj); | |
bc87dc25 | 1035 | #if URL_CHECKSUM_DEBUG |
62e76326 | 1036 | |
528b2c61 | 1037 | e->mem_obj->checkUrlChecksum(); |
bc87dc25 | 1038 | #endif |
62e76326 | 1039 | |
cfd66529 | 1040 | debugs(17, 3, HERE << e->url() << "?" ); |
62e76326 | 1041 | |
d6eb18d6 | 1042 | if (!EBIT_TEST(e->flags, ENTRY_FWD_HDR_WAIT)) { |
cfd66529 | 1043 | debugs(17, 3, HERE << "No, ENTRY_FWD_HDR_WAIT isn't set"); |
62e76326 | 1044 | return 0; |
d6eb18d6 | 1045 | } |
62e76326 | 1046 | |
437823b4 | 1047 | if (n_tries > Config.forward_max_tries) |
62e76326 | 1048 | return 0; |
1049 | ||
58217e94 | 1050 | if (request->bodyNibbled()) |
62e76326 | 1051 | return 0; |
1052 | ||
8652f8e7 AJ |
1053 | if (serverDestinations.size() <= 1) { |
1054 | // NP: <= 1 since total count includes the recently failed one. | |
cfd66529 | 1055 | debugs(17, 3, HERE << "No alternative forwarding paths left"); |
62e76326 | 1056 | return 0; |
db1cd23c | 1057 | } |
62e76326 | 1058 | |
9b769c67 | 1059 | const Http::StatusCode s = e->getReply()->sline.status(); |
cfd66529 | 1060 | debugs(17, 3, HERE << "status " << s); |
b6b6f466 | 1061 | return reforwardableStatus(s); |
db1cd23c | 1062 | } |
1063 | ||
2ac4f6b5 AR |
1064 | /** |
1065 | * Create "503 Service Unavailable" or "504 Gateway Timeout" error depending | |
1066 | * on whether this is a validation request. RFC 2616 says that we MUST reply | |
1067 | * with "504 Gateway Timeout" if validation fails and cached reply has | |
1068 | * proxy-revalidate, must-revalidate or s-maxage Cache-Control directive. | |
1069 | */ | |
1070 | ErrorState * | |
1071 | FwdState::makeConnectingError(const err_type type) const | |
1072 | { | |
450fe1cb | 1073 | return new ErrorState(type, request->flags.needValidation ? |
f11c8e2f | 1074 | Http::scGatewayTimeout : Http::scServiceUnavailable, request); |
2ac4f6b5 AR |
1075 | } |
1076 | ||
b6b6f466 | 1077 | static void |
1078 | fwdStats(StoreEntry * s) | |
64d8034e | 1079 | { |
b6b6f466 | 1080 | int i; |
1081 | int j; | |
1082 | storeAppendPrintf(s, "Status"); | |
62e76326 | 1083 | |
95dc7ff4 FC |
1084 | for (j = 1; j < MAX_FWD_STATS_IDX; ++j) { |
1085 | storeAppendPrintf(s, "\ttry#%d", j); | |
64d8034e | 1086 | } |
64d8034e | 1087 | |
b6b6f466 | 1088 | storeAppendPrintf(s, "\n"); |
0185bd6f | 1089 | |
955394ce | 1090 | for (i = 0; i <= (int) Http::scInvalidHeader; ++i) { |
b6b6f466 | 1091 | if (FwdReplyCodes[0][i] == 0) |
1092 | continue; | |
0185bd6f | 1093 | |
b6b6f466 | 1094 | storeAppendPrintf(s, "%3d", i); |
0185bd6f | 1095 | |
95dc7ff4 | 1096 | for (j = 0; j <= MAX_FWD_STATS_IDX; ++j) { |
b6b6f466 | 1097 | storeAppendPrintf(s, "\t%d", FwdReplyCodes[j][i]); |
62e76326 | 1098 | } |
62e76326 | 1099 | |
b6b6f466 | 1100 | storeAppendPrintf(s, "\n"); |
e0ebe27c | 1101 | } |
7197b20d | 1102 | } |
1103 | ||
b6b6f466 | 1104 | /**** STATIC MEMBER FUNCTIONS *************************************************/ |
db1cd23c | 1105 | |
b6b6f466 | 1106 | bool |
955394ce | 1107 | FwdState::reforwardableStatus(const Http::StatusCode s) const |
db1cd23c | 1108 | { |
b6b6f466 | 1109 | switch (s) { |
62e76326 | 1110 | |
955394ce | 1111 | case Http::scBadGateway: |
62e76326 | 1112 | |
f11c8e2f | 1113 | case Http::scGatewayTimeout: |
b6b6f466 | 1114 | return true; |
62e76326 | 1115 | |
955394ce | 1116 | case Http::scForbidden: |
62e76326 | 1117 | |
955394ce | 1118 | case Http::scInternalServerError: |
62e76326 | 1119 | |
955394ce | 1120 | case Http::scNotImplemented: |
62e76326 | 1121 | |
955394ce | 1122 | case Http::scServiceUnavailable: |
b6b6f466 | 1123 | return Config.retry.onerror; |
62e76326 | 1124 | |
b6b6f466 | 1125 | default: |
1126 | return false; | |
db1cd23c | 1127 | } |
b6b6f466 | 1128 | |
1129 | /* NOTREACHED */ | |
db1cd23c | 1130 | } |
8ddcc35d | 1131 | |
06093389 AJ |
1132 | /** |
1133 | * Decide where details need to be gathered to correctly describe a persistent connection. | |
1134 | * What is needed: | |
642a305c AJ |
1135 | * - the address/port details about this link |
1136 | * - domain name of server at other end of this link (either peer or requested host) | |
06093389 | 1137 | */ |
781ce8ff | 1138 | void |
642a305c | 1139 | FwdState::pconnPush(Comm::ConnectionPointer &conn, const char *domain) |
781ce8ff | 1140 | { |
642a305c | 1141 | if (conn->getPeer()) { |
7a150c71 | 1142 | fwdPconnPool->push(conn, NULL); |
06093389 | 1143 | } else { |
642a305c | 1144 | fwdPconnPool->push(conn, domain); |
06093389 | 1145 | } |
781ce8ff | 1146 | } |
1147 | ||
e8dca475 CT |
1148 | Comm::ConnectionPointer |
1149 | FwdState::pconnPop(const Comm::ConnectionPointer &dest, const char *domain) | |
1150 | { | |
1151 | // always call shared pool first because we need to close an idle | |
1152 | // connection there if we have to use a standby connection. | |
1153 | Comm::ConnectionPointer conn = fwdPconnPool->pop(dest, domain, checkRetriable()); | |
1154 | if (!Comm::IsConnOpen(conn)) { | |
1155 | // either there was no pconn to pop or this is not a retriable xaction | |
1156 | if (CachePeer *peer = dest->getPeer()) { | |
1157 | if (peer->standby.pool) | |
1158 | conn = peer->standby.pool->pop(dest, domain, true); | |
1159 | } | |
1160 | } | |
1161 | return conn; // open, closed, or nil | |
1162 | } | |
1163 | ||
8ddcc35d | 1164 | void |
b6b6f466 | 1165 | FwdState::initModule() |
8ddcc35d | 1166 | { |
6852be71 | 1167 | RegisterWithCacheManager(); |
8ddcc35d | 1168 | } |
1169 | ||
62ee09ca | 1170 | void |
84f50787 | 1171 | FwdState::RegisterWithCacheManager(void) |
62ee09ca | 1172 | { |
8822ebee | 1173 | Mgr::RegisterAction("forward", "Request Forwarding Statistics", fwdStats, 0, 1); |
62ee09ca | 1174 | } |
1175 | ||
b6b6f466 | 1176 | void |
955394ce | 1177 | FwdState::logReplyStatus(int tries, const Http::StatusCode status) |
8ddcc35d | 1178 | { |
955394ce | 1179 | if (status > Http::scInvalidHeader) |
62e76326 | 1180 | return; |
1181 | ||
75eb730e | 1182 | assert(tries >= 0); |
62e76326 | 1183 | |
8ddcc35d | 1184 | if (tries > MAX_FWD_STATS_IDX) |
62e76326 | 1185 | tries = MAX_FWD_STATS_IDX; |
1186 | ||
95dc7ff4 | 1187 | ++ FwdReplyCodes[tries][status]; |
8ddcc35d | 1188 | } |
1189 | ||
b6b6f466 | 1190 | /**** PRIVATE NON-MEMBER FUNCTIONS ********************************************/ |
62e76326 | 1191 | |
057f5854 | 1192 | /* |
1193 | * DPW 2007-05-19 | |
1194 | * Formerly static, but now used by client_side_request.cc | |
1195 | */ | |
425de4c8 AJ |
1196 | /// Checks for a TOS value to apply depending on the ACL |
1197 | tos_t | |
b6b6f466 | 1198 | aclMapTOS(acl_tos * head, ACLChecklist * ch) |
b6a2f15e | 1199 | { |
b6b6f466 | 1200 | acl_tos *l; |
62e76326 | 1201 | |
b6b6f466 | 1202 | for (l = head; l; l = l->next) { |
2efeb0b7 | 1203 | if (!l->aclList || ch->fastCheck(l->aclList) == ACCESS_ALLOWED) |
b6b6f466 | 1204 | return l->tos; |
1205 | } | |
5894ad28 | 1206 | |
b6b6f466 | 1207 | return 0; |
1208 | } | |
5894ad28 | 1209 | |
425de4c8 AJ |
1210 | /// Checks for a netfilter mark value to apply depending on the ACL |
1211 | nfmark_t | |
1212 | aclMapNfmark(acl_nfmark * head, ACLChecklist * ch) | |
1213 | { | |
1214 | acl_nfmark *l; | |
1215 | ||
1216 | for (l = head; l; l = l->next) { | |
2efeb0b7 | 1217 | if (!l->aclList || ch->fastCheck(l->aclList) == ACCESS_ALLOWED) |
425de4c8 AJ |
1218 | return l->nfmark; |
1219 | } | |
1220 | ||
1221 | return 0; | |
1222 | } | |
1223 | ||
cfd66529 | 1224 | void |
f9b72e0c | 1225 | getOutgoingAddress(HttpRequest * request, Comm::ConnectionPointer conn) |
b6b6f466 | 1226 | { |
07f889c1 | 1227 | // skip if an outgoing address is already set. |
4dd643d5 | 1228 | if (!conn->local.isAnyAddr()) return; |
cfd66529 | 1229 | |
07f889c1 | 1230 | // ensure that at minimum the wildcard local matches remote protocol |
4dd643d5 AJ |
1231 | if (conn->remote.isIPv4()) |
1232 | conn->local.setIPv4(); | |
07f889c1 | 1233 | |
cfd66529 | 1234 | // maybe use TPROXY client address |
450fe1cb | 1235 | if (request && request->flags.spoofClientIp) { |
739b352a | 1236 | if (!conn->getPeer() || !conn->getPeer()->options.no_tproxy) { |
96d64448 AJ |
1237 | #if FOLLOW_X_FORWARDED_FOR && LINUX_NETFILTER |
1238 | if (Config.onoff.tproxy_uses_indirect_client) | |
45906573 | 1239 | conn->local = request->indirect_client_addr; |
96d64448 AJ |
1240 | else |
1241 | #endif | |
45906573 | 1242 | conn->local = request->client_addr; |
cfd66529 AJ |
1243 | // some flags need setting on the socket to use this address |
1244 | conn->flags |= COMM_DOBIND; | |
1245 | conn->flags |= COMM_TRANSPARENT; | |
1246 | return; | |
1247 | } | |
b0758e04 AJ |
1248 | // else no tproxy today ... |
1249 | } | |
c303f6e3 | 1250 | |
b50e327b | 1251 | if (!Config.accessList.outgoing_address) { |
cfd66529 | 1252 | return; // anything will do. |
b50e327b AJ |
1253 | } |
1254 | ||
c0941a6a | 1255 | ACLFilledChecklist ch(NULL, request, NULL); |
739b352a | 1256 | ch.dst_peer = conn->getPeer(); |
cfd66529 AJ |
1257 | ch.dst_addr = conn->remote; |
1258 | ||
1259 | // TODO use the connection details in ACL. | |
1260 | // needs a bit of rework in ACLFilledChecklist to use Comm::Connection instead of ConnStateData | |
6db78a1a | 1261 | |
0dc8ffa5 | 1262 | AclAddress *l; |
cfd66529 AJ |
1263 | for (l = Config.accessList.outgoing_address; l; l = l->next) { |
1264 | ||
1265 | /* check if the outgoing address is usable to the destination */ | |
4dd643d5 | 1266 | if (conn->remote.isIPv4() != l->addr.isIPv4()) continue; |
cfd66529 AJ |
1267 | |
1268 | /* check ACLs for this outgoing address */ | |
2efeb0b7 | 1269 | if (!l->aclList || ch.fastCheck(l->aclList) == ACCESS_ALLOWED) { |
cfd66529 AJ |
1270 | conn->local = l->addr; |
1271 | return; | |
1272 | } | |
1273 | } | |
b6b6f466 | 1274 | } |
62e76326 | 1275 | |
425de4c8 AJ |
1276 | tos_t |
1277 | GetTosToServer(HttpRequest * request) | |
1278 | { | |
1279 | ACLFilledChecklist ch(NULL, request, NULL); | |
425de4c8 AJ |
1280 | return aclMapTOS(Ip::Qos::TheConfig.tosToServer, &ch); |
1281 | } | |
1282 | ||
1283 | nfmark_t | |
1284 | GetNfmarkToServer(HttpRequest * request) | |
b6b6f466 | 1285 | { |
c0941a6a | 1286 | ACLFilledChecklist ch(NULL, request, NULL); |
425de4c8 | 1287 | return aclMapNfmark(Ip::Qos::TheConfig.nfmarkToServer, &ch); |
b6a2f15e | 1288 | } |
6ee88490 CT |
1289 | |
1290 | void | |
1291 | GetMarkingsToServer(HttpRequest * request, Comm::Connection &conn) | |
1292 | { | |
1293 | // Get the server side TOS and Netfilter mark to be set on the connection. | |
1294 | if (Ip::Qos::TheConfig.isAclTosActive()) { | |
1295 | conn.tos = GetTosToServer(request); | |
1296 | debugs(17, 3, "from " << conn.local << " tos " << int(conn.tos)); | |
1297 | } | |
1298 | ||
1299 | #if SO_MARK && USE_LIBCAP | |
1300 | conn.nfmark = GetNfmarkToServer(request); | |
1301 | debugs(17, 3, "from " << conn.local << " netfilter mark " << conn.nfmark); | |
1302 | #else | |
1303 | conn.nfmark = 0; | |
1304 | #endif | |
1305 | } |