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92ae4c86 | 1 | /* |
bbc27441 AJ |
2 | * Copyright (C) 1996-2014 The Squid Software Foundation and contributors |
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 | ||
aea65fec | 14 | #include "base/Lock.h" |
8939f9c9 | 15 | #include "client_side.h" |
92ae4c86 | 16 | |
27c841f6 AR |
17 | namespace Ftp |
18 | { | |
92ae4c86 AR |
19 | |
20 | typedef enum { | |
21 | fssBegin, | |
22 | fssConnected, | |
23 | fssHandleFeat, | |
24 | fssHandlePasv, | |
25 | fssHandlePort, | |
26 | fssHandleDataRequest, | |
27 | fssHandleUploadRequest, | |
28 | fssHandleEprt, | |
29 | fssHandleEpsv, | |
30 | fssHandleCwd, | |
31 | fssHandlePass, | |
32 | fssHandleCdup, | |
33 | fssError | |
34 | } ServerState; | |
35 | ||
36 | // TODO: This should become a part of MasterXaction when we start sending | |
37 | // master transactions to the clients/ code. | |
38 | /// Transaction information shared among our FTP client and server jobs. | |
aea65fec | 39 | class MasterState: public RefCountable |
92ae4c86 AR |
40 | { |
41 | public: | |
aea65fec AR |
42 | typedef RefCount<MasterState> Pointer; |
43 | ||
44 | MasterState(): serverState(fssBegin), clientReadGreeting(false) {} | |
45 | ||
92ae4c86 | 46 | Ip::Address clientDataAddr; ///< address of our FTP client data connection |
43446566 | 47 | SBuf workingDir; ///< estimated current working directory for URI formation |
92ae4c86 AR |
48 | ServerState serverState; ///< what our FTP server is doing |
49 | bool clientReadGreeting; ///< whether our FTP client read their FTP server greeting | |
92ae4c86 AR |
50 | }; |
51 | ||
52 | /// Manages a control connection from an FTP client. | |
53 | class Server: public ConnStateData | |
54 | { | |
55 | public: | |
56 | explicit Server(const MasterXaction::Pointer &xact); | |
57 | virtual ~Server(); | |
58 | ||
aea65fec AR |
59 | // This is a pointer in hope to minimize future changes when MasterState |
60 | // becomes a part of MasterXaction. Guaranteed not to be nil. | |
61 | MasterState::Pointer master; ///< info shared among our FTP client and server jobs | |
92ae4c86 AR |
62 | |
63 | protected: | |
64 | friend void StartListening(); | |
65 | ||
eacfca83 AR |
66 | // errors detected before it is possible to create an HTTP request wrapper |
67 | typedef enum { | |
68 | eekHugeRequest, | |
69 | eekMissingLogin, | |
70 | eekMissingUsername, | |
71 | eekMissingHost, | |
72 | eekUnsupportedCommand, | |
73 | eekInvalidUri, | |
74 | eekMalformedCommand | |
75 | } EarlyErrorKind; | |
76 | ||
92ae4c86 AR |
77 | /* ConnStateData API */ |
78 | virtual ClientSocketContext *parseOneRequest(Http::ProtocolVersion &ver); | |
79 | virtual void processParsedRequest(ClientSocketContext *context, const Http::ProtocolVersion &ver); | |
80 | virtual void notePeerConnection(Comm::ConnectionPointer conn); | |
81 | virtual void clientPinnedConnectionClosed(const CommCloseCbParams &io); | |
82 | virtual void handleReply(HttpReply *header, StoreIOBuffer receivedData); | |
83 | virtual int pipelinePrefetchMax() const; | |
84 | virtual void writeControlMsgAndCall(ClientSocketContext *context, HttpReply *rep, AsyncCall::Pointer &call); | |
85 | virtual time_t idleTimeout() const; | |
86 | ||
87 | /* BodyPipe API */ | |
88 | virtual void noteMoreBodySpaceAvailable(BodyPipe::Pointer); | |
89 | virtual void noteBodyConsumerAborted(BodyPipe::Pointer ptr); | |
90 | ||
91 | /* AsyncJob API */ | |
92 | virtual void start(); | |
93 | ||
94 | /* Comm callbacks */ | |
95 | static void AcceptCtrlConnection(const CommAcceptCbParams ¶ms); | |
96 | void acceptDataConnection(const CommAcceptCbParams ¶ms); | |
97 | void readUploadData(const CommIoCbParams &io); | |
98 | void wroteEarlyReply(const CommIoCbParams &io); | |
99 | void wroteReply(const CommIoCbParams &io); | |
100 | void wroteReplyData(const CommIoCbParams &io); | |
101 | void connectedForData(const CommConnectCbParams ¶ms); | |
102 | ||
103 | unsigned int listenForDataConnection(); | |
104 | bool createDataConnection(Ip::Address cltAddr); | |
105 | void closeDataConnection(); | |
106 | ||
1ab04517 | 107 | void calcUri(const SBuf *file); |
92ae4c86 | 108 | void changeState(const Ftp::ServerState newState, const char *reason); |
eacfca83 | 109 | ClientSocketContext *handleUserRequest(const SBuf &cmd, SBuf ¶ms); |
92ae4c86 AR |
110 | bool checkDataConnPost() const; |
111 | void replyDataWritingCheckpoint(); | |
112 | void maybeReadUploadData(); | |
113 | ||
114 | void setReply(const int code, const char *msg); | |
115 | void writeCustomReply(const int code, const char *msg, const HttpReply *reply = NULL); | |
116 | void writeEarlyReply(const int code, const char *msg); | |
117 | void writeErrorReply(const HttpReply *reply, const int status); | |
118 | void writeForwardedForeign(const HttpReply *reply); | |
119 | void writeForwardedReply(const HttpReply *reply); | |
120 | void writeForwardedReplyAndCall(const HttpReply *reply, AsyncCall::Pointer &call); | |
121 | void writeReply(MemBuf &mb); | |
122 | ||
eacfca83 AR |
123 | ClientSocketContext *earlyError(const EarlyErrorKind eek); |
124 | bool handleRequest(HttpRequest *); | |
92ae4c86 AR |
125 | void setDataCommand(); |
126 | bool checkDataConnPre(); | |
127 | ||
128 | /// a method handling an FTP command; selected by handleRequest() | |
129 | typedef bool (Ftp::Server::*RequestHandler)(String &cmd, String ¶ms); | |
130 | bool handleFeatRequest(String &cmd, String ¶ms); | |
131 | bool handlePasvRequest(String &cmd, String ¶ms); | |
132 | bool handlePortRequest(String &cmd, String ¶ms); | |
133 | bool handleDataRequest(String &cmd, String ¶ms); | |
134 | bool handleUploadRequest(String &cmd, String ¶ms); | |
135 | bool handleEprtRequest(String &cmd, String ¶ms); | |
136 | bool handleEpsvRequest(String &cmd, String ¶ms); | |
137 | bool handleCwdRequest(String &cmd, String ¶ms); | |
138 | bool handlePassRequest(String &cmd, String ¶ms); | |
139 | bool handleCdupRequest(String &cmd, String ¶ms); | |
140 | ||
141 | /// a method handling an FTP response; selected by handleReply() | |
142 | typedef void (Ftp::Server::*ReplyHandler)(const HttpReply *reply, StoreIOBuffer data); | |
143 | void handleFeatReply(const HttpReply *header, StoreIOBuffer receivedData); | |
144 | void handlePasvReply(const HttpReply *header, StoreIOBuffer receivedData); | |
145 | void handlePortReply(const HttpReply *header, StoreIOBuffer receivedData); | |
146 | void handleErrorReply(const HttpReply *header, StoreIOBuffer receivedData); | |
147 | void handleDataReply(const HttpReply *header, StoreIOBuffer receivedData); | |
148 | void handleUploadReply(const HttpReply *header, StoreIOBuffer receivedData); | |
149 | void handleEprtReply(const HttpReply *header, StoreIOBuffer receivedData); | |
150 | void handleEpsvReply(const HttpReply *header, StoreIOBuffer receivedData); | |
151 | ||
152 | private: | |
153 | void doProcessRequest(); | |
154 | void shovelUploadData(); | |
e7ce227f | 155 | void resetLogin(const char *reason); |
92ae4c86 | 156 | |
1ab04517 AR |
157 | SBuf uri; ///< a URI reconstructed from various FTP message details |
158 | SBuf host; ///< intended dest. of a transparently intercepted FTP conn | |
92ae4c86 AR |
159 | bool gotEpsvAll; ///< restrict data conn setup commands to just EPSV |
160 | AsyncCall::Pointer onDataAcceptCall; ///< who to call upon data conn acceptance | |
161 | Comm::ConnectionPointer dataListenConn; ///< data connection listening socket | |
162 | Comm::ConnectionPointer dataConn; ///< data connection | |
163 | char uploadBuf[CLIENT_REQ_BUF_SZ]; ///< data connection input buffer | |
164 | size_t uploadAvailSize; ///< number of yet unused uploadBuf bytes | |
165 | ||
166 | AsyncCall::Pointer listener; ///< set when we are passively listening | |
167 | AsyncCall::Pointer connector; ///< set when we are actively connecting | |
168 | AsyncCall::Pointer reader; ///< set when we are reading FTP data | |
169 | ||
170 | CBDATA_CLASS2(Server); | |
171 | }; | |
172 | ||
173 | } // namespace Ftp | |
174 | ||
175 | #endif /* SQUID_SERVERS_FTP_SERVER_H */ |