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92ae4c86 | 1 | /* |
bf95c10a | 2 | * Copyright (C) 1996-2022 The Squid Software Foundation and contributors |
bbc27441 AJ |
3 | * |
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. | |
92ae4c86 AR |
7 | */ |
8 | ||
bbc27441 AJ |
9 | /* DEBUG: section 33 Client-side Routines */ |
10 | ||
92ae4c86 AR |
11 | #ifndef SQUID_SERVERS_FTP_SERVER_H |
12 | #define SQUID_SERVERS_FTP_SERVER_H | |
13 | ||
2b6b1bcb | 14 | #include "base/JobWait.h" |
aea65fec | 15 | #include "base/Lock.h" |
8939f9c9 | 16 | #include "client_side.h" |
2b6b1bcb | 17 | #include "comm/forward.h" |
92ae4c86 | 18 | |
27c841f6 AR |
19 | namespace Ftp |
20 | { | |
92ae4c86 AR |
21 | |
22 | typedef enum { | |
23 | fssBegin, | |
24 | fssConnected, | |
25 | fssHandleFeat, | |
26 | fssHandlePasv, | |
27 | fssHandlePort, | |
28 | fssHandleDataRequest, | |
29 | fssHandleUploadRequest, | |
30 | fssHandleEprt, | |
31 | fssHandleEpsv, | |
32 | fssHandleCwd, | |
33 | fssHandlePass, | |
34 | fssHandleCdup, | |
35 | fssError | |
36 | } ServerState; | |
37 | ||
38 | // TODO: This should become a part of MasterXaction when we start sending | |
39 | // master transactions to the clients/ code. | |
40 | /// Transaction information shared among our FTP client and server jobs. | |
aea65fec | 41 | class MasterState: public RefCountable |
92ae4c86 AR |
42 | { |
43 | public: | |
aea65fec AR |
44 | typedef RefCount<MasterState> Pointer; |
45 | ||
a8d1312d | 46 | MasterState(): serverState(fssBegin), clientReadGreeting(false), userDataDone(0) {} |
aea65fec | 47 | |
92ae4c86 | 48 | Ip::Address clientDataAddr; ///< address of our FTP client data connection |
43446566 | 49 | SBuf workingDir; ///< estimated current working directory for URI formation |
92ae4c86 AR |
50 | ServerState serverState; ///< what our FTP server is doing |
51 | bool clientReadGreeting; ///< whether our FTP client read their FTP server greeting | |
92cfc72f CT |
52 | /// Squid will send or has sent this final status code to the FTP client |
53 | int userDataDone; | |
92ae4c86 AR |
54 | }; |
55 | ||
56 | /// Manages a control connection from an FTP client. | |
57 | class Server: public ConnStateData | |
58 | { | |
d836b06f | 59 | CBDATA_CHILD(Server); |
5c2f68b7 | 60 | |
92ae4c86 AR |
61 | public: |
62 | explicit Server(const MasterXaction::Pointer &xact); | |
337b9aa4 | 63 | ~Server() override; |
d836b06f | 64 | |
0d253dfa | 65 | /* AsyncJob API */ |
337b9aa4 | 66 | void callException(const std::exception &e) override; |
92ae4c86 | 67 | |
3238b9b6 CT |
68 | /// Called by Ftp::Client class when it is start receiving or |
69 | /// sending data. | |
70 | void startWaitingForOrigin(); | |
71 | ||
92cfc72f CT |
72 | /// Called by Ftp::Client class when it is done receiving or |
73 | /// sending data. Waits for both agents to be done before | |
74 | /// responding to the FTP client and closing the data connection. | |
3238b9b6 | 75 | void stopWaitingForOrigin(int status); |
92cfc72f | 76 | |
aea65fec AR |
77 | // This is a pointer in hope to minimize future changes when MasterState |
78 | // becomes a part of MasterXaction. Guaranteed not to be nil. | |
79 | MasterState::Pointer master; ///< info shared among our FTP client and server jobs | |
92ae4c86 AR |
80 | |
81 | protected: | |
82 | friend void StartListening(); | |
83 | ||
eacfca83 | 84 | // errors detected before it is possible to create an HTTP request wrapper |
3aab028c FC |
85 | enum class EarlyErrorKind { |
86 | HugeRequest, | |
87 | MissingLogin, | |
88 | MissingUsername, | |
89 | MissingHost, | |
90 | UnsupportedCommand, | |
91 | InvalidUri, | |
92 | MalformedCommand | |
93 | }; | |
eacfca83 | 94 | |
92ae4c86 | 95 | /* ConnStateData API */ |
337b9aa4 AR |
96 | Http::Stream *parseOneRequest() override; |
97 | void processParsedRequest(Http::StreamPointer &context) override; | |
98 | void notePeerConnection(Comm::ConnectionPointer conn) override; | |
99 | void clientPinnedConnectionClosed(const CommCloseCbParams &io) override; | |
100 | void handleReply(HttpReply *header, StoreIOBuffer receivedData) override; | |
101 | int pipelinePrefetchMax() const override; | |
102 | bool writeControlMsgAndCall(HttpReply *rep, AsyncCall::Pointer &call) override; | |
103 | time_t idleTimeout() const override; | |
92ae4c86 AR |
104 | |
105 | /* BodyPipe API */ | |
337b9aa4 AR |
106 | void noteMoreBodySpaceAvailable(BodyPipe::Pointer) override; |
107 | void noteBodyConsumerAborted(BodyPipe::Pointer ptr) override; | |
92ae4c86 AR |
108 | |
109 | /* AsyncJob API */ | |
337b9aa4 | 110 | void start() override; |
92ae4c86 AR |
111 | |
112 | /* Comm callbacks */ | |
113 | static void AcceptCtrlConnection(const CommAcceptCbParams ¶ms); | |
114 | void acceptDataConnection(const CommAcceptCbParams ¶ms); | |
115 | void readUploadData(const CommIoCbParams &io); | |
116 | void wroteEarlyReply(const CommIoCbParams &io); | |
117 | void wroteReply(const CommIoCbParams &io); | |
118 | void wroteReplyData(const CommIoCbParams &io); | |
119 | void connectedForData(const CommConnectCbParams ¶ms); | |
120 | ||
121 | unsigned int listenForDataConnection(); | |
122 | bool createDataConnection(Ip::Address cltAddr); | |
123 | void closeDataConnection(); | |
124 | ||
2f8abb64 | 125 | /// Called after data transfer on client-to-squid data connection is |
92cfc72f CT |
126 | /// finished. |
127 | void userDataCompletionCheckpoint(int finalStatusCode); | |
128 | ||
129 | /// Writes the data-transfer status reply to the FTP client and | |
130 | /// closes the data connection. | |
3238b9b6 | 131 | void completeDataDownload(); |
92cfc72f | 132 | |
1ab04517 | 133 | void calcUri(const SBuf *file); |
92ae4c86 | 134 | void changeState(const Ftp::ServerState newState, const char *reason); |
d3dddfb5 | 135 | Http::Stream *handleUserRequest(const SBuf &cmd, SBuf ¶ms); |
92ae4c86 AR |
136 | bool checkDataConnPost() const; |
137 | void replyDataWritingCheckpoint(); | |
138 | void maybeReadUploadData(); | |
139 | ||
140 | void setReply(const int code, const char *msg); | |
aee3523a | 141 | void writeCustomReply(const int code, const char *msg, const HttpReply *reply = nullptr); |
92ae4c86 AR |
142 | void writeEarlyReply(const int code, const char *msg); |
143 | void writeErrorReply(const HttpReply *reply, const int status); | |
144 | void writeForwardedForeign(const HttpReply *reply); | |
145 | void writeForwardedReply(const HttpReply *reply); | |
146 | void writeForwardedReplyAndCall(const HttpReply *reply, AsyncCall::Pointer &call); | |
147 | void writeReply(MemBuf &mb); | |
148 | ||
d3dddfb5 | 149 | Http::Stream *earlyError(const EarlyErrorKind eek); |
eacfca83 | 150 | bool handleRequest(HttpRequest *); |
92ae4c86 AR |
151 | void setDataCommand(); |
152 | bool checkDataConnPre(); | |
153 | ||
154 | /// a method handling an FTP command; selected by handleRequest() | |
155 | typedef bool (Ftp::Server::*RequestHandler)(String &cmd, String ¶ms); | |
156 | bool handleFeatRequest(String &cmd, String ¶ms); | |
157 | bool handlePasvRequest(String &cmd, String ¶ms); | |
158 | bool handlePortRequest(String &cmd, String ¶ms); | |
159 | bool handleDataRequest(String &cmd, String ¶ms); | |
160 | bool handleUploadRequest(String &cmd, String ¶ms); | |
161 | bool handleEprtRequest(String &cmd, String ¶ms); | |
162 | bool handleEpsvRequest(String &cmd, String ¶ms); | |
163 | bool handleCwdRequest(String &cmd, String ¶ms); | |
164 | bool handlePassRequest(String &cmd, String ¶ms); | |
165 | bool handleCdupRequest(String &cmd, String ¶ms); | |
166 | ||
167 | /// a method handling an FTP response; selected by handleReply() | |
168 | typedef void (Ftp::Server::*ReplyHandler)(const HttpReply *reply, StoreIOBuffer data); | |
169 | void handleFeatReply(const HttpReply *header, StoreIOBuffer receivedData); | |
170 | void handlePasvReply(const HttpReply *header, StoreIOBuffer receivedData); | |
171 | void handlePortReply(const HttpReply *header, StoreIOBuffer receivedData); | |
172 | void handleErrorReply(const HttpReply *header, StoreIOBuffer receivedData); | |
173 | void handleDataReply(const HttpReply *header, StoreIOBuffer receivedData); | |
174 | void handleUploadReply(const HttpReply *header, StoreIOBuffer receivedData); | |
175 | void handleEprtReply(const HttpReply *header, StoreIOBuffer receivedData); | |
176 | void handleEpsvReply(const HttpReply *header, StoreIOBuffer receivedData); | |
177 | ||
178 | private: | |
179 | void doProcessRequest(); | |
180 | void shovelUploadData(); | |
e7ce227f | 181 | void resetLogin(const char *reason); |
92ae4c86 | 182 | |
1ab04517 AR |
183 | SBuf uri; ///< a URI reconstructed from various FTP message details |
184 | SBuf host; ///< intended dest. of a transparently intercepted FTP conn | |
92ae4c86 AR |
185 | bool gotEpsvAll; ///< restrict data conn setup commands to just EPSV |
186 | AsyncCall::Pointer onDataAcceptCall; ///< who to call upon data conn acceptance | |
187 | Comm::ConnectionPointer dataListenConn; ///< data connection listening socket | |
188 | Comm::ConnectionPointer dataConn; ///< data connection | |
189 | char uploadBuf[CLIENT_REQ_BUF_SZ]; ///< data connection input buffer | |
190 | size_t uploadAvailSize; ///< number of yet unused uploadBuf bytes | |
191 | ||
192 | AsyncCall::Pointer listener; ///< set when we are passively listening | |
2b6b1bcb AR |
193 | |
194 | /// Waits for an FTP data connection to the client to be established/opened. | |
195 | /// This wait only happens in FTP active mode (via PORT or EPRT). | |
196 | JobWait<Comm::ConnOpener> dataConnWait; | |
197 | ||
92ae4c86 | 198 | AsyncCall::Pointer reader; ///< set when we are reading FTP data |
3238b9b6 CT |
199 | |
200 | /// whether we wait for the origin data transfer to end | |
201 | bool waitingForOrigin; | |
202 | /// whether the origin data transfer aborted | |
203 | bool originDataDownloadAbortedOnError; | |
a8d1312d | 204 | |
3238b9b6 CT |
205 | /// a response which writing was postponed until stopWaitingForOrigin() |
206 | HttpReply::Pointer delayedReply; | |
92ae4c86 AR |
207 | }; |
208 | ||
209 | } // namespace Ftp | |
210 | ||
211 | #endif /* SQUID_SERVERS_FTP_SERVER_H */ | |
f53969cc | 212 |