2 * Copyright (C) 1996-2016 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 /* DEBUG: section 33 Client-side Routines */
11 #ifndef SQUID_CLIENTSIDE_H
12 #define SQUID_CLIENTSIDE_H
14 #include "base/RunnersRegistry.h"
15 #include "clientStreamForward.h"
17 #include "helper/forward.h"
18 #include "http/forward.h"
19 #include "HttpControlMsg.h"
20 #include "ipc/FdNotes.h"
21 #include "sbuf/SBuf.h"
22 #include "servers/Server.h"
24 #include "auth/UserRequest.h"
27 #include "ssl/support.h"
30 class ClientHttpRequest
;
31 class HttpHdrRangeSpec
;
41 * Legacy Server code managing a connection to a client.
43 * NP: presents AsyncJob API but does not operate autonomously as a Job.
44 * So Must() is not safe to use.
46 * Multiple requests (up to pipeline_prefetch) can be pipelined.
47 * This object is responsible for managing which one is currently being
48 * fulfilled and what happens to the queue if the current one causes the client
49 * connection to be closed early.
51 * Act as a manager for the client connection and passes data in buffer to a
52 * Parser relevant to the state (message headers vs body) that is being
55 * Performs HTTP message processing to kick off the actual HTTP request
56 * handling objects (Http::Stream, ClientHttpRequest, HttpRequest).
58 * Performs SSL-Bump processing for switching between HTTP and HTTPS protocols.
60 * To terminate a ConnStateData close() the client Comm::Connection it is
61 * managing, or for graceful half-close use the stopReceiving() or
62 * stopSending() methods.
64 class ConnStateData
: public Server
, public HttpControlMsgSink
, public RegisteredRunner
68 explicit ConnStateData(const MasterXaction::Pointer
&xact
);
69 virtual ~ConnStateData();
72 virtual void receivedFirstByte();
73 virtual bool handleReadData();
74 virtual void afterClientRead();
75 virtual void afterClientWrite(size_t);
77 /* HttpControlMsgSink API */
78 virtual void sendControlMsg(HttpControlMsg
);
81 bool clientParseRequests();
82 void readNextRequest();
84 /// try to make progress on a transaction or read more I/O
87 virtual bool isOpen() const;
89 Http1::TeChunkedParser
*bodyParser
; ///< parses HTTP/1.1 chunked request body
91 /** number of body bytes we need to comm_read for the "current" request
93 * \retval 0 We do not need to read any [more] body bytes
94 * \retval negative May need more but do not know how many; could be zero!
95 * \retval positive Need to read exactly that many more body bytes
97 int64_t mayNeedToReadMoreBody() const;
101 * Fetch the user details for connection based authentication
102 * NOTE: this is ONLY connection based because NTLM and Negotiate is against HTTP spec.
104 const Auth::UserRequest::Pointer
&getAuth() const { return auth_
; }
107 * Set the user details for connection-based authentication to use from now until connection closure.
109 * Any change to existing credentials shows that something invalid has happened. Such as:
110 * - NTLM/Negotiate auth was violated by the per-request headers missing a revalidation token
111 * - NTLM/Negotiate auth was violated by the per-request headers being for another user
112 * - SSL-Bump CONNECT tunnel with persistent credentials has ended
114 void setAuth(const Auth::UserRequest::Pointer
&aur
, const char *cause
);
117 Ip::Address log_addr
;
120 bool readMore
; ///< needs comm_read (for this request or new requests)
121 bool swanSang
; // XXX: temporary flag to check proper cleanup
124 Comm::ConnectionPointer serverConnection
; /* pinned server side connection */
125 char *host
; /* host name of pinned connection */
126 int port
; /* port of pinned connection */
127 bool pinned
; /* this connection was pinned */
128 bool auth
; /* pinned for www authentication */
129 bool reading
; ///< we are monitoring for peer connection closure
130 bool zeroReply
; ///< server closed w/o response (ERR_ZERO_SIZE_OBJECT)
131 CachePeer
*peer
; /* CachePeer the connection goes via */
132 AsyncCall::Pointer readHandler
; ///< detects serverConnection closure
133 AsyncCall::Pointer closeHandler
; /*The close handler for pinned server side connection*/
136 /// If the port is not set then it is a connection-less object
137 /// created by an internal squid subsystem
138 bool connectionless() const { return port
== NULL
; }
140 bool transparent() const;
142 /// true if we stopped receiving the request
143 const char *stoppedReceiving() const { return stoppedReceiving_
; }
144 /// true if we stopped sending the response
145 const char *stoppedSending() const { return stoppedSending_
; }
146 /// note request receiving error and close as soon as we write the response
147 void stopReceiving(const char *error
);
148 /// note response sending error and close as soon as we read the request
149 void stopSending(const char *error
);
151 void expectNoForwarding(); ///< cleans up virgin request [body] forwarding state
154 BodyPipe::Pointer
expectRequestBody(int64_t size
);
155 virtual void noteMoreBodySpaceAvailable(BodyPipe::Pointer
) = 0;
156 virtual void noteBodyConsumerAborted(BodyPipe::Pointer
) = 0;
158 bool handleRequestBodyData();
160 /// Forward future client requests using the given server connection.
161 /// Optionally, monitor pinned server connection for remote-end closures.
162 void pinConnection(const Comm::ConnectionPointer
&pinServerConn
, HttpRequest
*request
, CachePeer
*peer
, bool auth
, bool monitor
= true);
163 /// Undo pinConnection() and, optionally, close the pinned connection.
164 void unpinConnection(const bool andClose
);
165 /// Returns validated pinnned server connection (and stops its monitoring).
166 Comm::ConnectionPointer
borrowPinnedConnection(HttpRequest
*request
, const CachePeer
*aPeer
);
168 * Checks if there is pinning info if it is valid. It can close the server side connection
169 * if pinned info is not valid.
170 \param request if it is not NULL also checks if the pinning info refers to the request client side HttpRequest
171 \param CachePeer if it is not NULL also check if the CachePeer is the pinning CachePeer
172 \return The details of the server side connection (may be closed if failures were present).
174 const Comm::ConnectionPointer
validatePinnedConnection(HttpRequest
*request
, const CachePeer
*peer
);
176 * returts the pinned CachePeer if exists, NULL otherwise
178 CachePeer
*pinnedPeer() const {return pinning
.peer
;}
179 bool pinnedAuth() const {return pinning
.auth
;}
181 /// called just before a FwdState-dispatched job starts using connection
182 virtual void notePeerConnection(Comm::ConnectionPointer
) {}
184 // pining related comm callbacks
185 virtual void clientPinnedConnectionClosed(const CommCloseCbParams
&io
);
188 void clientReadFtpData(const CommIoCbParams
&io
);
189 void connStateClosed(const CommCloseCbParams
&io
);
190 void requestTimeout(const CommTimeoutCbParams
¶ms
);
193 virtual void start();
194 virtual bool doneAll() const { return BodyProducer::doneAll() && false;}
195 virtual void swanSong();
197 /// Changes state so that we close the connection and quit after serving
198 /// the client-side-detected error response instead of getting stuck.
199 void quitAfterError(HttpRequest
*request
); // meant to be private
201 /// The caller assumes responsibility for connection closure detection.
202 void stopPinnedConnectionMonitoring();
205 /// the second part of old httpsAccept, waiting for future HttpsServer home
206 void postHttpsAccept();
208 /// Initializes and starts a peek-and-splice negotiation with the SSL client
209 void startPeekAndSplice();
210 /// Called when the initialization of peek-and-splice negotiation finidhed
211 void startPeekAndSpliceDone();
212 /// Called when a peek-and-splice step finished. For example after
213 /// server SSL certificates received and fake server SSL certificates
215 void doPeekAndSpliceStep();
216 /// called by FwdState when it is done bumping the server
217 void httpsPeeked(Comm::ConnectionPointer serverConnection
);
219 /// Splice a bumped client connection on peek-and-splice mode
222 /// Check on_unsupported_protocol access list and splice if required
223 /// \retval true on splice
224 /// \retval false otherwise
225 bool spliceOnError(const err_type err
);
227 /// Start to create dynamic Security::ContextPtr for host or uses static port SSL context.
228 void getSslContextStart();
230 * Done create dynamic ssl certificate.
232 * \param[in] isNew if generated certificate is new, so we need to add this certificate to storage.
234 void getSslContextDone(Security::ContextPtr sslContext
, bool isNew
= false);
235 /// Callback function. It is called when squid receive message from ssl_crtd.
236 static void sslCrtdHandleReplyWrapper(void *data
, const Helper::Reply
&reply
);
237 /// Proccess response from ssl_crtd.
238 void sslCrtdHandleReply(const Helper::Reply
&reply
);
240 void switchToHttps(HttpRequest
*request
, Ssl::BumpMode bumpServerMode
);
241 bool switchedToHttps() const { return switchedToHttps_
; }
242 Ssl::ServerBump
*serverBump() {return sslServerBump
;}
243 inline void setServerBump(Ssl::ServerBump
*srvBump
) {
245 sslServerBump
= srvBump
;
247 assert(sslServerBump
== srvBump
);
249 const SBuf
&sslCommonName() const {return sslCommonName_
;}
250 void resetSslCommonName(const char *name
) {sslCommonName_
= name
;}
251 /// Fill the certAdaptParams with the required data for certificate adaptation
252 /// and create the key for storing/retrieve the certificate to/from the cache
253 void buildSslCertGenerationParams(Ssl::CertificateProperties
&certProperties
);
254 /// Called when the client sends the first request on a bumped connection.
255 /// Returns false if no [delayed] error should be written to the client.
256 /// Otherwise, writes the error to the client and returns true. Also checks
257 /// for SQUID_X509_V_ERR_DOMAIN_MISMATCH on bumped requests.
258 bool serveDelayedError(Http::Stream
*);
260 Ssl::BumpMode sslBumpMode
; ///< ssl_bump decision (Ssl::bumpEnd if n/a).
263 bool switchedToHttps() const { return false; }
266 /* clt_conn_tag=tag annotation access */
267 const SBuf
&connectionTag() const { return connectionTag_
; }
268 void connectionTag(const char *aTag
) { connectionTag_
= aTag
; }
270 /// handle a control message received by context from a peer and call back
271 virtual void writeControlMsgAndCall(HttpReply
*rep
, AsyncCall::Pointer
&call
) = 0;
273 /// ClientStream calls this to supply response header (once) and data
274 /// for the current Http::Stream.
275 virtual void handleReply(HttpReply
*header
, StoreIOBuffer receivedData
) = 0;
277 /// remove no longer needed leading bytes from the input buffer
278 void consumeInput(const size_t byteCount
);
280 /* TODO: Make the methods below (at least) non-public when possible. */
282 /// stop parsing the request and create context for relaying error info
283 Http::Stream
*abortRequestParsing(const char *const errUri
);
285 /// generate a fake CONNECT request with the given payload
286 /// at the beginning of the client I/O buffer
287 void fakeAConnectRequest(const char *reason
, const SBuf
&payload
);
289 /// client data which may need to forward as-is to server after an
290 /// on_unsupported_protocol tunnel decision.
291 SBuf preservedClientData
;
293 /* Registered Runner API */
294 virtual void startShutdown();
295 virtual void endingShutdown();
298 void startDechunkingRequest();
299 void finishDechunkingRequest(bool withSuccess
);
300 void abortChunkedRequestBody(const err_type error
);
301 err_type
handleChunkedRequestBody();
303 void startPinnedConnectionMonitoring();
304 void clientPinnedConnectionRead(const CommIoCbParams
&io
);
306 /// Handles a ready-for-reading TLS squid-to-server connection that
307 /// we thought was idle.
308 /// \return false if and only if the connection should be closed.
309 bool handleIdleClientPinnedTlsRead();
312 /// parse input buffer prefix into a single transfer protocol request
313 /// return NULL to request more header bytes (after checking any limits)
314 /// use abortRequestParsing() to handle parsing errors w/o creating request
315 virtual Http::Stream
*parseOneRequest() = 0;
317 /// start processing a freshly parsed request
318 virtual void processParsedRequest(Http::Stream
*) = 0;
320 /// returning N allows a pipeline of 1+N requests (see pipeline_prefetch)
321 virtual int pipelinePrefetchMax() const;
323 /// timeout to use when waiting for the next request
324 virtual time_t idleTimeout() const = 0;
326 BodyPipe::Pointer bodyPipe
; ///< set when we are reading request body
330 virtual bool connFinishedWithConn(int size
);
332 void clientAfterReadingRequests();
333 bool concurrentRequestQueueFilled() const;
335 void pinNewConnection(const Comm::ConnectionPointer
&pinServer
, HttpRequest
*request
, CachePeer
*aPeer
, bool auth
);
337 /* PROXY protocol functionality */
338 bool proxyProtocolValidateClient();
339 bool parseProxyProtocolHeader();
340 bool parseProxy1p0();
341 bool parseProxy2p0();
342 bool proxyProtocolError(const char *reason
);
344 /// whether PROXY protocol header is still expected
345 bool needProxyProtocolHeader_
;
348 /// some user details that can be used to perform authentication on this connection
349 Auth::UserRequest::Pointer auth_
;
352 /// the parser state for current HTTP/1.x input buffer processing
353 Http1::RequestParserPointer parser_
;
356 bool switchedToHttps_
;
357 /// The SSL server host name appears in CONNECT request or the server ip address for the intercepted requests
358 String sslConnectHostOrIp
; ///< The SSL server host name as passed in the CONNECT request
359 SBuf sslCommonName_
; ///< CN name for SSL certificate generation
360 String sslBumpCertKey
; ///< Key to use to store/retrieve generated certificate
362 /// HTTPS server cert. fetching state for bump-ssl-server-first
363 Ssl::ServerBump
*sslServerBump
;
364 Ssl::CertSignAlgorithm signAlgorithm
; ///< The signing algorithm to use
367 /// the reason why we no longer write the response or nil
368 const char *stoppedSending_
;
369 /// the reason why we no longer read the request or nil
370 const char *stoppedReceiving_
;
372 SBuf connectionTag_
; ///< clt_conn_tag=Tag annotation for client connection
375 void setLogUri(ClientHttpRequest
* http
, char const *uri
, bool cleanUrl
= false);
377 const char *findTrailingHTTPVersion(const char *uriAndHTTPVersion
, const char *end
= NULL
);
379 int varyEvaluateMatch(StoreEntry
* entry
, HttpRequest
* req
);
381 /// accept requests to a given port and inform subCall about them
382 void clientStartListeningOn(AnyP::PortCfgPointer
&port
, const RefCount
< CommCbFunPtrCallT
<CommAcceptCbPtrFun
> > &subCall
, const Ipc::FdNoteId noteId
);
384 void clientOpenListenSockets(void);
385 void clientConnectionsClose(void);
386 void httpRequestFree(void *);
388 /// decide whether to expect multiple requests on the corresponding connection
389 void clientSetKeepaliveFlag(ClientHttpRequest
*http
);
391 /// append a "part" HTTP header (as in a multi-part/range reply) to the buffer
392 void clientPackRangeHdr(const HttpReply
*, const HttpHdrRangeSpec
*, String boundary
, MemBuf
*);
394 /// put terminating boundary for multiparts to the buffer
395 void clientPackTermBound(String boundary
, MemBuf
*);
397 /* misplaced declaratrions of Stream callbacks provided/used by client side */
398 SQUIDCEXTERN CSR clientGetMoreData
;
399 SQUIDCEXTERN CSS clientReplyStatus
;
400 SQUIDCEXTERN CSD clientReplyDetach
;
401 CSCB clientSocketRecipient
;
402 CSD clientSocketDetach
;
404 /* TODO: Move to HttpServer. Warning: Move requires large code nonchanges! */
405 Http::Stream
*parseHttpRequest(ConnStateData
*, const Http1::RequestParserPointer
&);
406 void clientProcessRequest(ConnStateData
*, const Http1::RequestParserPointer
&, Http::Stream
*);
407 void clientPostHttpsAccept(ConnStateData
*);
409 #endif /* SQUID_CLIENTSIDE_H */