FtpServer.cc
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1 /*
2  * Copyright (C) 1996-2017 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.
7  */
8 
9 /* DEBUG: section 33 Transfer protocol servers */
10 
11 #include "squid.h"
12 #include "acl/FilledChecklist.h"
13 #include "base/CharacterSet.h"
14 #include "base/RefCount.h"
15 #include "base/Subscription.h"
16 #include "client_side_reply.h"
17 #include "client_side_request.h"
18 #include "clientStream.h"
19 #include "comm/ConnOpener.h"
20 #include "comm/Read.h"
21 #include "comm/TcpAcceptor.h"
22 #include "comm/Write.h"
23 #include "errorpage.h"
24 #include "fd.h"
25 #include "ftp/Elements.h"
26 #include "ftp/Parsing.h"
27 #include "globals.h"
28 #include "http/one/RequestParser.h"
29 #include "http/Stream.h"
30 #include "HttpHdrCc.h"
31 #include "ip/tools.h"
32 #include "ipc/FdNotes.h"
33 #include "parser/Tokenizer.h"
34 #include "servers/forward.h"
35 #include "servers/FtpServer.h"
36 #include "SquidConfig.h"
37 #include "StatCounters.h"
38 #include "tools.h"
39 
40 #include <set>
41 #include <map>
42 
44 
45 namespace Ftp
46 {
47 static void PrintReply(MemBuf &mb, const HttpReply *reply, const char *const prefix = "");
48 static bool SupportedCommand(const SBuf &name);
49 static bool CommandHasPathParameter(const SBuf &cmd);
50 };
51 
53  AsyncJob("Ftp::Server"),
54  ConnStateData(xact),
55  master(new MasterState),
56  uri(),
57  host(),
58  gotEpsvAll(false),
59  onDataAcceptCall(),
60  dataListenConn(),
61  dataConn(),
62  uploadAvailSize(0),
63  listener(),
64  connector(),
65  reader(),
66  waitingForOrigin(false),
67  originDataDownloadAbortedOnError(false)
68 {
69  flags.readMore = false; // we need to announce ourselves first
70  *uploadBuf = 0;
71 }
72 
74 {
75  closeDataConnection();
76 }
77 
78 int
80 {
81  return 0; // no support for concurrent FTP requests
82 }
83 
84 time_t
86 {
88 }
89 
90 void
92 {
94 
95  if (transparent()) {
96  char buf[MAX_IPSTRLEN];
97  clientConnection->local.toUrl(buf, MAX_IPSTRLEN);
98  host = buf;
99  calcUri(NULL);
100  debugs(33, 5, "FTP transparent URL: " << uri);
101  }
102 
103  writeEarlyReply(220, "Service ready");
104 }
105 
107 void
109 {
110  if (reader != NULL)
111  return;
112 
113  const size_t availSpace = sizeof(uploadBuf) - uploadAvailSize;
114  if (availSpace <= 0)
115  return;
116 
117  debugs(33, 4, dataConn << ": reading FTP data...");
118 
120  reader = JobCallback(33, 5, Dialer, this, Ftp::Server::readUploadData);
121  comm_read(dataConn, uploadBuf + uploadAvailSize, availSpace,
122  reader);
123 }
124 
126 void
128 {
129  // zero pipelinePrefetchMax() ensures that there is only parsed request
130  Must(pipeline.count() == 1);
131  Http::StreamPointer context = pipeline.front();
132  Must(context != nullptr);
133 
134  ClientHttpRequest *const http = context->http;
135  assert(http != NULL);
136 
137  HttpRequest *const request = http->request;
138  Must(http->storeEntry() || request);
139  const bool mayForward = !http->storeEntry() && handleRequest(request);
140 
141  if (http->storeEntry() != NULL) {
142  debugs(33, 4, "got an immediate response");
144  context->pullData();
145  } else if (mayForward) {
146  debugs(33, 4, "forwarding request to server side");
147  assert(http->storeEntry() == NULL);
149  } else {
150  debugs(33, 4, "will resume processing later");
151  }
152 }
153 
154 void
156 {
157  Must(pipeline.count() == 1);
158 
159  // Process FTP request asynchronously to make sure FTP
160  // data connection accept callback is fired first.
161  CallJobHere(33, 4, CbcPointer<Server>(this),
162  Ftp::Server, doProcessRequest);
163 }
164 
166 void
168 {
169  debugs(33, 5, io.conn << " size " << io.size);
170  Must(reader != NULL);
171  reader = NULL;
172 
173  assert(Comm::IsConnOpen(dataConn));
174  assert(io.conn->fd == dataConn->fd);
175 
176  if (io.flag == Comm::OK && bodyPipe != NULL) {
177  if (io.size > 0) {
179 
180  char *const current_buf = uploadBuf + uploadAvailSize;
181  if (io.buf != current_buf)
182  memmove(current_buf, io.buf, io.size);
183  uploadAvailSize += io.size;
184  shovelUploadData();
185  } else if (io.size == 0) {
186  debugs(33, 5, io.conn << " closed");
187  closeDataConnection();
188  if (uploadAvailSize <= 0)
189  finishDechunkingRequest(true);
190  }
191  } else { // not Comm::Flags::OK or unexpected read
192  debugs(33, 5, io.conn << " closed");
193  closeDataConnection();
194  finishDechunkingRequest(false);
195  }
196 
197 }
198 
200 void
202 {
203  assert(bodyPipe != NULL);
204 
205  debugs(33, 5, "handling FTP request data for " << clientConnection);
206  const size_t putSize = bodyPipe->putMoreData(uploadBuf,
207  uploadAvailSize);
208  if (putSize > 0) {
209  uploadAvailSize -= putSize;
210  if (uploadAvailSize > 0)
211  memmove(uploadBuf, uploadBuf + putSize, uploadAvailSize);
212  }
213 
214  if (Comm::IsConnOpen(dataConn))
215  maybeReadUploadData();
216  else if (uploadAvailSize <= 0)
217  finishDechunkingRequest(true);
218 }
219 
220 void
222 {
223  if (!isOpen()) // if we are closing, nothing to do
224  return;
225 
226  shovelUploadData();
227 }
228 
229 void
231 {
232  if (!isOpen()) // if we are closing, nothing to do
233  return;
234 
236  closeDataConnection();
237 }
238 
240 void
242 {
243  MasterXaction::Pointer xact = params.xaction;
245 
246  // NP: it is possible the port was reconfigured when the call or accept() was queued.
247 
248  if (params.flag != Comm::OK) {
249  // Its possible the call was still queued when the client disconnected
250  debugs(33, 2, s->listenConn << ": FTP accept failure: " << xstrerr(params.xerrno));
251  return;
252  }
253 
254  debugs(33, 4, params.conn << ": accepted");
255  fd_note(params.conn->fd, "client ftp connect");
256 
257  if (s->tcp_keepalive.enabled)
258  commSetTcpKeepalive(params.conn->fd, s->tcp_keepalive.idle, s->tcp_keepalive.interval, s->tcp_keepalive.timeout);
259 
261 
262  AsyncJob::Start(new Server(xact));
263 }
264 
265 void
267 {
268  for (AnyP::PortCfgPointer s = FtpPortList; s != NULL; s = s->next) {
270  debugs(1, DBG_IMPORTANT, "Ignoring ftp_port lines exceeding the" <<
271  " limit of " << MAXTCPLISTENPORTS << " ports.");
272  break;
273  }
274 
275  // direct new connections accepted by listenConn to Accept()
276  typedef CommCbFunPtrCallT<CommAcceptCbPtrFun> AcceptCall;
277  RefCount<AcceptCall> subCall = commCbCall(5, 5, "Ftp::Server::AcceptCtrlConnection",
281  }
282 }
283 
284 void
286 {
287  for (AnyP::PortCfgPointer s = FtpPortList; s != NULL; s = s->next) {
288  if (s->listenConn != NULL) {
289  debugs(1, DBG_IMPORTANT, "Closing FTP port " << s->listenConn->local);
290  s->listenConn->close();
291  s->listenConn = NULL;
292  }
293  }
294 }
295 
296 void
298 {
299  // find request
300  Http::StreamPointer context = pipeline.front();
301  Must(context != nullptr);
302  ClientHttpRequest *const http = context->http;
303  Must(http != NULL);
304  HttpRequest *const request = http->request;
305  Must(request != NULL);
306  // make FTP peer connection exclusive to our request
307  pinBusyConnection(conn, request);
308 }
309 
310 void
312 {
314 
315  // TODO: Keep the control connection open after fixing the reset
316  // problem below
317  if (Comm::IsConnOpen(clientConnection))
318  clientConnection->close();
319 
320  // TODO: If the server control connection is gone, reset state to login
321  // again. Reseting login alone is not enough: FtpRelay::sendCommand() will
322  // not re-login because FtpRelay::serverState() is not going to be
323  // fssConnected. Calling resetLogin() alone is also harmful because
324  // it does not reset correctly the client-to-squid control connection (eg
325  // respond if required with an error code, in all cases)
326  // resetLogin("control connection closure");
327 }
328 
330 void
331 Ftp::Server::resetLogin(const char *reason)
332 {
333  debugs(33, 5, "will need to re-login due to " << reason);
334  master->clientReadGreeting = false;
335  changeState(fssBegin, reason);
336 }
337 
339 void
341 {
342  // TODO: fill a class URL instead of string
343  uri = "ftp://";
344  uri.append(host);
345  if (port->ftp_track_dirs && master->workingDir.length()) {
346  if (master->workingDir[0] != '/')
347  uri.append("/", 1);
348  uri.append(master->workingDir);
349  }
350 
351  if (uri[uri.length() - 1] != '/')
352  uri.append("/", 1);
353 
354  if (port->ftp_track_dirs && file) {
355  static const CharacterSet Slash("/", "/");
356  Parser::Tokenizer tok(*file);
357  tok.skipAll(Slash);
358  uri.append(tok.remaining());
359  }
360 }
361 
364 unsigned int
366 {
367  closeDataConnection();
368 
370  conn->flags = COMM_NONBLOCKING;
371  conn->local = transparent() ? port->s : clientConnection->local;
372  conn->local.port(0);
373  const char *const note = uri.c_str();
374  comm_open_listener(SOCK_STREAM, IPPROTO_TCP, conn, note);
375  if (!Comm::IsConnOpen(conn)) {
376  debugs(5, DBG_CRITICAL, "comm_open_listener failed for FTP data: " <<
377  conn->local << " error: " << errno);
378  writeCustomReply(451, "Internal error");
379  return 0;
380  }
381 
382  typedef CommCbMemFunT<Server, CommAcceptCbParams> AcceptDialer;
383  typedef AsyncCallT<AcceptDialer> AcceptCall;
384  RefCount<AcceptCall> call = static_cast<AcceptCall*>(JobCallback(5, 5, AcceptDialer, this, Ftp::Server::acceptDataConnection));
386  listener = call.getRaw();
387  dataListenConn = conn;
388  AsyncJob::Start(new Comm::TcpAcceptor(conn, note, sub));
389 
390  const unsigned int listeningPort = comm_local_port(conn->fd);
391  conn->local.port(listeningPort);
392  return listeningPort;
393 }
394 
395 void
397 {
398  if (params.flag != Comm::OK) {
399  // Its possible the call was still queued when the client disconnected
400  debugs(33, 2, dataListenConn << ": accept "
401  "failure: " << xstrerr(params.xerrno));
402  return;
403  }
404 
405  debugs(33, 4, "accepted " << params.conn);
406  fd_note(params.conn->fd, "passive client ftp data");
408 
409  if (!clientConnection) {
410  debugs(33, 5, "late data connection?");
411  closeDataConnection(); // in case we are still listening
412  params.conn->close();
413  } else if (params.conn->remote != clientConnection->remote) {
414  debugs(33, 2, "rogue data conn? ctrl: " << clientConnection->remote);
415  params.conn->close();
416  // Some FTP servers close control connection here, but it may make
417  // things worse from DoS p.o.v. and no better from data stealing p.o.v.
418  } else {
419  closeDataConnection();
420  dataConn = params.conn;
421  uploadAvailSize = 0;
422  debugs(33, 7, "ready for data");
423  if (onDataAcceptCall != NULL) {
424  AsyncCall::Pointer call = onDataAcceptCall;
425  onDataAcceptCall = NULL;
426  // If we got an upload request, start reading data from the client.
427  if (master->serverState == fssHandleUploadRequest)
428  maybeReadUploadData();
429  else
430  Must(master->serverState == fssHandleDataRequest);
431  MemBuf mb;
432  mb.init();
433  mb.appendf("150 Data connection opened.\r\n");
434  Comm::Write(clientConnection, &mb, call);
435  }
436  }
437 }
438 
439 void
441 {
442  if (listener != NULL) {
443  listener->cancel("no longer needed");
444  listener = NULL;
445  }
446 
447  if (Comm::IsConnOpen(dataListenConn)) {
448  debugs(33, 5, "FTP closing client data listen socket: " <<
449  *dataListenConn);
450  dataListenConn->close();
451  }
452  dataListenConn = NULL;
453 
454  if (reader != NULL) {
455  // Comm::ReadCancel can deal with negative FDs
456  Comm::ReadCancel(dataConn->fd, reader);
457  reader = NULL;
458  }
459 
460  if (Comm::IsConnOpen(dataConn)) {
461  debugs(33, 5, "FTP closing client data connection: " <<
462  *dataConn);
463  dataConn->close();
464  }
465  dataConn = NULL;
466 }
467 
470 void
471 Ftp::Server::writeEarlyReply(const int code, const char *msg)
472 {
473  debugs(33, 7, code << ' ' << msg);
474  assert(99 < code && code < 1000);
475 
476  MemBuf mb;
477  mb.init();
478  mb.appendf("%i %s\r\n", code, msg);
479 
481  AsyncCall::Pointer call = JobCallback(33, 5, Dialer, this, Ftp::Server::wroteEarlyReply);
482  Comm::Write(clientConnection, &mb, call);
483 
484  flags.readMore = false;
485 
486  // TODO: Create master transaction. Log it in wroteEarlyReply().
487 }
488 
489 void
491 {
492  debugs(9, 2, "FTP Client " << clientConnection);
493  debugs(9, 2, "FTP Client REPLY:\n---------\n" << mb.buf <<
494  "\n----------");
495 
497  AsyncCall::Pointer call = JobCallback(33, 5, Dialer, this, Ftp::Server::wroteReply);
498  Comm::Write(clientConnection, &mb, call);
499 }
500 
501 void
502 Ftp::Server::writeCustomReply(const int code, const char *msg, const HttpReply *reply)
503 {
504  debugs(33, 7, code << ' ' << msg);
505  assert(99 < code && code < 1000);
506 
507  const bool sendDetails = reply != NULL &&
509 
510  MemBuf mb;
511  mb.init();
512  if (sendDetails) {
513  mb.appendf("%i-%s\r\n", code, msg);
514  mb.appendf(" Server reply:\r\n");
515  Ftp::PrintReply(mb, reply, " ");
516  mb.appendf("%i \r\n", code);
517  } else
518  mb.appendf("%i %s\r\n", code, msg);
519 
520  writeReply(mb);
521 }
522 
523 void
524 Ftp::Server::changeState(const ServerState newState, const char *reason)
525 {
526  if (master->serverState == newState) {
527  debugs(33, 3, "client state unchanged at " << master->serverState <<
528  " because " << reason);
529  master->serverState = newState;
530  } else {
531  debugs(33, 3, "client state was " << master->serverState <<
532  ", now " << newState << " because " << reason);
533  master->serverState = newState;
534  }
535 }
536 
538 static bool
540 {
541  static std::set<SBuf> PathedCommands;
542  if (!PathedCommands.size()) {
543  PathedCommands.insert(cmdMlst());
544  PathedCommands.insert(cmdMlsd());
545  PathedCommands.insert(cmdStat());
546  PathedCommands.insert(cmdNlst());
547  PathedCommands.insert(cmdList());
548  PathedCommands.insert(cmdMkd());
549  PathedCommands.insert(cmdRmd());
550  PathedCommands.insert(cmdDele());
551  PathedCommands.insert(cmdRnto());
552  PathedCommands.insert(cmdRnfr());
553  PathedCommands.insert(cmdAppe());
554  PathedCommands.insert(cmdStor());
555  PathedCommands.insert(cmdRetr());
556  PathedCommands.insert(cmdSmnt());
557  PathedCommands.insert(cmdCwd());
558  }
559 
560  return PathedCommands.find(cmd) != PathedCommands.end();
561 }
562 
564 Http::Stream *
566 {
567  /* Default values, to be updated by the switch statement below */
568  int scode = 421;
569  const char *reason = "Internal error";
570  const char *errUri = "error:ftp-internal-early-error";
571 
572  switch (eek) {
573  case EarlyErrorKind::HugeRequest:
574  scode = 421;
575  reason = "Huge request";
576  errUri = "error:ftp-huge-request";
577  break;
578 
579  case EarlyErrorKind::MissingLogin:
580  scode = 530;
581  reason = "Must login first";
582  errUri = "error:ftp-must-login-first";
583  break;
584 
585  case EarlyErrorKind::MissingUsername:
586  scode = 501;
587  reason = "Missing username";
588  errUri = "error:ftp-missing-username";
589  break;
590 
591  case EarlyErrorKind::MissingHost:
592  scode = 501;
593  reason = "Missing host";
594  errUri = "error:ftp-missing-host";
595  break;
596 
597  case EarlyErrorKind::UnsupportedCommand:
598  scode = 502;
599  reason = "Unknown or unsupported command";
600  errUri = "error:ftp-unsupported-command";
601  break;
602 
603  case EarlyErrorKind::InvalidUri:
604  scode = 501;
605  reason = "Invalid URI";
606  errUri = "error:ftp-invalid-uri";
607  break;
608 
609  case EarlyErrorKind::MalformedCommand:
610  scode = 421;
611  reason = "Malformed command";
612  errUri = "error:ftp-malformed-command";
613  break;
614 
615  // no default so that a compiler can check that we have covered all cases
616  }
617 
618  Http::Stream *context = abortRequestParsing(errUri);
620  Must(node);
621  clientReplyContext *repContext = dynamic_cast<clientReplyContext *>(node->data.getRaw());
622  Must(repContext);
623 
624  // We cannot relay FTP scode/reason via HTTP-specific ErrorState.
625  // TODO: When/if ErrorState can handle native FTP errors, use it instead.
626  HttpReply *reply = Ftp::HttpReplyWrapper(scode, reason, Http::scBadRequest, -1);
627  repContext->setReplyToReply(reply);
628  return context;
629 }
630 
634 Http::Stream *
636 {
637  flags.readMore = false; // common for all but one case below
638 
639  // OWS <command> [ RWS <parameter> ] OWS LF
640 
641  // InlineSpaceChars are isspace(3) or RFC 959 Section 3.1.1.5.2, except
642  // for the LF character that we must exclude here (but see FullWhiteSpace).
643  static const char * const InlineSpaceChars = " \f\r\t\v";
644  static const CharacterSet InlineSpace = CharacterSet("Ftp::Inline", InlineSpaceChars);
645  static const CharacterSet FullWhiteSpace = (InlineSpace + CharacterSet::LF).rename("Ftp::FWS");
646  static const CharacterSet CommandChars = FullWhiteSpace.complement("Ftp::Command");
647  static const CharacterSet TailChars = CharacterSet::LF.complement("Ftp::Tail");
648 
649  // This set is used to ignore empty commands without allowing an attacker
650  // to keep us endlessly busy by feeding us whitespace or empty commands.
651  static const CharacterSet &LeadingSpace = FullWhiteSpace;
652 
653  SBuf cmd;
654  SBuf params;
655 
656  Parser::Tokenizer tok(inBuf);
657 
658  (void)tok.skipAll(LeadingSpace); // leading OWS and empty commands
659  const bool parsed = tok.prefix(cmd, CommandChars); // required command
660 
661  // note that the condition below will eat either RWS or trailing OWS
662  if (parsed && tok.skipAll(InlineSpace) && tok.prefix(params, TailChars)) {
663  // now params may include trailing OWS
664  // TODO: Support right-trimming using CharacterSet in Tokenizer instead
665  static const SBuf bufWhiteSpace(InlineSpaceChars);
666  params.trim(bufWhiteSpace, false, true);
667  }
668 
669  // Why limit command line and parameters size? Did not we just parse them?
670  // XXX: Our good old String cannot handle very long strings.
671  const SBuf::size_type tokenMax = min(
672  static_cast<SBuf::size_type>(32*1024), // conservative
673  static_cast<SBuf::size_type>(Config.maxRequestHeaderSize));
674  if (cmd.length() > tokenMax || params.length() > tokenMax) {
675  changeState(fssError, "huge req token");
676  quitAfterError(NULL);
677  return earlyError(EarlyErrorKind::HugeRequest);
678  }
679 
680  // technically, we may skip multiple NLs below, but that is OK
681  if (!parsed || !tok.skipAll(CharacterSet::LF)) { // did not find terminating LF yet
682  // we need more data, but can we buffer more?
683  if (inBuf.length() >= Config.maxRequestHeaderSize) {
684  changeState(fssError, "huge req");
685  quitAfterError(NULL);
686  return earlyError(EarlyErrorKind::HugeRequest);
687  } else {
688  flags.readMore = true;
689  debugs(33, 5, "Waiting for more, up to " <<
690  (Config.maxRequestHeaderSize - inBuf.length()));
691  return NULL;
692  }
693  }
694 
695  Must(parsed && cmd.length());
696  consumeInput(tok.parsedSize()); // TODO: Would delaying optimize copying?
697 
698  debugs(33, 2, ">>ftp " << cmd << (params.isEmpty() ? "" : " ") << params);
699 
700  cmd.toUpper(); // this should speed up and simplify future comparisons
701 
702  // interception cases do not need USER to calculate the uri
703  if (!transparent()) {
704  if (!master->clientReadGreeting) {
705  // the first command must be USER
706  if (!pinning.pinned && cmd != cmdUser())
707  return earlyError(EarlyErrorKind::MissingLogin);
708  }
709 
710  // process USER request now because it sets FTP peer host name
711  if (cmd == cmdUser()) {
712  if (Http::Stream *errCtx = handleUserRequest(cmd, params))
713  return errCtx;
714  }
715  }
716 
717  if (!Ftp::SupportedCommand(cmd))
718  return earlyError(EarlyErrorKind::UnsupportedCommand);
719 
720  const HttpRequestMethod method =
721  cmd == cmdAppe() || cmd == cmdStor() || cmd == cmdStou() ?
723 
724  const SBuf *path = (params.length() && CommandHasPathParameter(cmd)) ?
725  &params : NULL;
726  calcUri(path);
728  mx->tcpClient = clientConnection;
729  HttpRequest *const request = HttpRequest::FromUrl(uri.c_str(), mx, method);
730  if (!request) {
731  debugs(33, 5, "Invalid FTP URL: " << uri);
732  uri.clear();
733  return earlyError(EarlyErrorKind::InvalidUri);
734  }
735  char *newUri = xstrdup(uri.c_str());
736 
737  request->flags.ftpNative = true;
739 
740  // Our fake Request-URIs are not distinctive enough for caching to work
741  request->flags.cachable = false; // XXX: reset later by maybeCacheable()
742  request->flags.noCache = true;
743 
745  request->header.putStr(Http::HdrType::FTP_ARGUMENTS, params.c_str()); // may be ""
746  if (method == Http::METHOD_PUT) {
747  request->header.putStr(Http::HdrType::EXPECT, "100-continue");
748  request->header.putStr(Http::HdrType::TRANSFER_ENCODING, "chunked");
749  }
750 
751  ClientHttpRequest *const http = new ClientHttpRequest(this);
752  http->request = request;
753  HTTPMSGLOCK(http->request);
754  http->req_sz = tok.parsedSize();
755  http->uri = newUri;
756 
757  Http::Stream *const result =
758  new Http::Stream(clientConnection, http);
759 
760  StoreIOBuffer tempBuffer;
761  tempBuffer.data = result->reqbuf;
762  tempBuffer.length = HTTP_REQBUF_SZ;
763 
764  ClientStreamData newServer = new clientReplyContext(http);
765  ClientStreamData newClient = result;
768  clientSocketDetach, newClient, tempBuffer);
769 
770  result->flags.parsed_ok = 1;
771  return result;
772 }
773 
774 void
776 {
777  // the caller guarantees that we are dealing with the current context only
778  Http::StreamPointer context = pipeline.front();
779  assert(context != nullptr);
780 
781  if (context->http && context->http->al != NULL &&
782  !context->http->al->reply && reply) {
783  context->http->al->reply = reply;
784  HTTPMSGLOCK(context->http->al->reply);
785  }
786 
787  static ReplyHandler handlers[] = {
788  NULL, // fssBegin
789  NULL, // fssConnected
790  &Ftp::Server::handleFeatReply, // fssHandleFeat
791  &Ftp::Server::handlePasvReply, // fssHandlePasv
792  &Ftp::Server::handlePortReply, // fssHandlePort
793  &Ftp::Server::handleDataReply, // fssHandleDataRequest
794  &Ftp::Server::handleUploadReply, // fssHandleUploadRequest
795  &Ftp::Server::handleEprtReply,// fssHandleEprt
796  &Ftp::Server::handleEpsvReply,// fssHandleEpsv
797  NULL, // fssHandleCwd
798  NULL, // fssHandlePass
799  NULL, // fssHandleCdup
800  &Ftp::Server::handleErrorReply // fssError
801  };
802  try {
803  const Server &server = dynamic_cast<const Ftp::Server&>(*context->getConn());
804  if (const ReplyHandler handler = handlers[server.master->serverState])
805  (this->*handler)(reply, data);
806  else
807  writeForwardedReply(reply);
808  } catch (const std::exception &e) {
809  callException(e);
810  throw TexcHere(e.what());
811  }
812 }
813 
814 void
816 {
817  if (pipeline.front()->http->request->errType != ERR_NONE) {
818  writeCustomReply(502, "Server does not support FEAT", reply);
819  return;
820  }
821 
822  Must(reply);
823  HttpReply::Pointer featReply = Ftp::HttpReplyWrapper(211, "End", Http::scNoContent, 0);
824  HttpHeader const &serverReplyHeader = reply->header;
825 
827  bool hasEPRT = false;
828  bool hasEPSV = false;
829  int prependSpaces = 1;
830 
831  featReply->header.putStr(Http::HdrType::FTP_PRE, "\"211-Features:\"");
832  const int scode = serverReplyHeader.getInt(Http::HdrType::FTP_STATUS);
833  if (scode == 211) {
834  while (const HttpHeaderEntry *e = serverReplyHeader.getEntry(&pos)) {
835  if (e->id == Http::HdrType::FTP_PRE) {
836  // assume RFC 2389 FEAT response format, quoted by Squid:
837  // <"> SP NAME [SP PARAMS] <">
838  // but accommodate MS servers sending four SPs before NAME
839 
840  // command name ends with (SP parameter) or quote
841  static const CharacterSet AfterFeatNameChars("AfterFeatName", " \"");
842  static const CharacterSet FeatNameChars = AfterFeatNameChars.complement("FeatName");
843 
844  Parser::Tokenizer tok(SBuf(e->value.termedBuf()));
845  if (!tok.skip('"') || !tok.skip(' '))
846  continue;
847 
848  // optional spaces; remember their number to accomodate MS servers
849  prependSpaces = 1 + tok.skipAll(CharacterSet::SP);
850 
851  SBuf cmd;
852  if (!tok.prefix(cmd, FeatNameChars))
853  continue;
854  cmd.toUpper();
855 
856  if (Ftp::SupportedCommand(cmd)) {
857  featReply->header.addEntry(e->clone());
858  }
859 
860  if (cmd == cmdEprt())
861  hasEPRT = true;
862  else if (cmd == cmdEpsv())
863  hasEPSV = true;
864  }
865  }
866  } // else we got a FEAT error and will only report Squid-supported features
867 
868  char buf[256];
869  if (!hasEPRT) {
870  snprintf(buf, sizeof(buf), "\"%*s\"", prependSpaces + 4, "EPRT");
871  featReply->header.putStr(Http::HdrType::FTP_PRE, buf);
872  }
873  if (!hasEPSV) {
874  snprintf(buf, sizeof(buf), "\"%*s\"", prependSpaces + 4, "EPSV");
875  featReply->header.putStr(Http::HdrType::FTP_PRE, buf);
876  }
877 
878  featReply->header.refreshMask();
879 
880  writeForwardedReply(featReply.getRaw());
881 }
882 
883 void
885 {
886  const Http::StreamPointer context(pipeline.front());
887  assert(context != nullptr);
888 
889  if (context->http->request->errType != ERR_NONE) {
890  writeCustomReply(502, "Server does not support PASV", reply);
891  return;
892  }
893 
894  const unsigned short localPort = listenForDataConnection();
895  if (!localPort)
896  return;
897 
898  char addr[MAX_IPSTRLEN];
899  // remote server in interception setups and local address otherwise
900  const Ip::Address &server = transparent() ?
901  clientConnection->local : dataListenConn->local;
902  server.toStr(addr, MAX_IPSTRLEN, AF_INET);
903  addr[MAX_IPSTRLEN - 1] = '\0';
904  for (char *c = addr; *c != '\0'; ++c) {
905  if (*c == '.')
906  *c = ',';
907  }
908 
909  // In interception setups, we combine remote server address with a
910  // local port number and hope that traffic will be redirected to us.
911  // Do not use "227 =a,b,c,d,p1,p2" format or omit parens: some nf_ct_ftp
912  // versions block responses that use those alternative syntax rules!
913  MemBuf mb;
914  mb.init();
915  mb.appendf("227 Entering Passive Mode (%s,%i,%i).\r\n",
916  addr,
917  static_cast<int>(localPort / 256),
918  static_cast<int>(localPort % 256));
919  debugs(9, 3, Raw("writing", mb.buf, mb.size));
920  writeReply(mb);
921 }
922 
923 void
925 {
926  if (pipeline.front()->http->request->errType != ERR_NONE) {
927  writeCustomReply(502, "Server does not support PASV (converted from PORT)", reply);
928  return;
929  }
930 
931  writeCustomReply(200, "PORT successfully converted to PASV.");
932 
933  // and wait for RETR
934 }
935 
936 void
938 {
939  if (!pinning.pinned) // we failed to connect to server
940  uri.clear();
941  // 421: we will close due to fssError
942  writeErrorReply(reply, 421);
943 }
944 
945 void
947 {
948  if (reply != NULL && reply->sline.status() != Http::scOkay) {
949  writeForwardedReply(reply);
950  if (Comm::IsConnOpen(dataConn)) {
951  debugs(33, 3, "closing " << dataConn << " on KO reply");
952  closeDataConnection();
953  }
954  return;
955  }
956 
957  if (!dataConn) {
958  // We got STREAM_COMPLETE (or error) and closed the client data conn.
959  debugs(33, 3, "ignoring FTP srv data response after clt data closure");
960  return;
961  }
962 
963  if (!checkDataConnPost()) {
964  writeCustomReply(425, "Data connection is not established.");
965  closeDataConnection();
966  return;
967  }
968 
969  debugs(33, 7, data.length);
970 
971  if (data.length <= 0) {
972  replyDataWritingCheckpoint(); // skip the actual write call
973  return;
974  }
975 
976  MemBuf mb;
977  mb.init(data.length + 1, data.length + 1);
978  mb.append(data.data, data.length);
979 
981  AsyncCall::Pointer call = JobCallback(33, 5, Dialer, this, Ftp::Server::wroteReplyData);
982  Comm::Write(dataConn, &mb, call);
983 
984  pipeline.front()->noteSentBodyBytes(data.length);
985 }
986 
988 void
990 {
991  if (io.flag == Comm::ERR_CLOSING)
992  return;
993 
994  if (io.flag != Comm::OK) {
995  debugs(33, 3, "FTP reply data writing failed: " << xstrerr(io.xerrno));
996  userDataCompletionCheckpoint(426);
997  return;
998  }
999 
1000  assert(pipeline.front()->http);
1001  pipeline.front()->http->out.size += io.size;
1002  replyDataWritingCheckpoint();
1003 }
1004 
1006 void
1008 {
1009  switch (pipeline.front()->socketState()) {
1010  case STREAM_NONE:
1011  debugs(33, 3, "Keep going");
1012  pipeline.front()->pullData();
1013  return;
1014  case STREAM_COMPLETE:
1015  debugs(33, 3, "FTP reply data transfer successfully complete");
1016  userDataCompletionCheckpoint(226);
1017  break;
1019  debugs(33, 3, "FTP reply data transfer failed: STREAM_UNPLANNED_COMPLETE");
1020  userDataCompletionCheckpoint(451);
1021  break;
1022  case STREAM_FAILED:
1023  userDataCompletionCheckpoint(451);
1024  debugs(33, 3, "FTP reply data transfer failed: STREAM_FAILED");
1025  break;
1026  default:
1027  fatal("unreachable code");
1028  }
1029 }
1030 
1031 void
1033 {
1034  writeForwardedReply(reply);
1035  // note that the client data connection may already be closed by now
1036 }
1037 
1038 void
1040 {
1041  Must(reply);
1042 
1043  if (waitingForOrigin) {
1044  Must(delayedReply == NULL);
1045  delayedReply = reply;
1046  return;
1047  }
1048 
1049  const HttpHeader &header = reply->header;
1050  // adaptation and forwarding errors lack Http::HdrType::FTP_STATUS
1051  if (!header.has(Http::HdrType::FTP_STATUS)) {
1052  writeForwardedForeign(reply); // will get to Ftp::Server::wroteReply
1053  return;
1054  }
1055 
1057  AsyncCall::Pointer call = JobCallback(33, 5, Dialer, this, Ftp::Server::wroteReply);
1058  writeForwardedReplyAndCall(reply, call);
1059 }
1060 
1061 void
1063 {
1064  if (pipeline.front()->http->request->errType != ERR_NONE) {
1065  writeCustomReply(502, "Server does not support PASV (converted from EPRT)", reply);
1066  return;
1067  }
1068 
1069  writeCustomReply(200, "EPRT successfully converted to PASV.");
1070 
1071  // and wait for RETR
1072 }
1073 
1074 void
1076 {
1077  if (pipeline.front()->http->request->errType != ERR_NONE) {
1078  writeCustomReply(502, "Cannot connect to server", reply);
1079  return;
1080  }
1081 
1082  const unsigned short localPort = listenForDataConnection();
1083  if (!localPort)
1084  return;
1085 
1086  // In interception setups, we use a local port number and hope that data
1087  // traffic will be redirected to us.
1088  MemBuf mb;
1089  mb.init();
1090  mb.appendf("229 Entering Extended Passive Mode (|||%u|)\r\n", localPort);
1091 
1092  debugs(9, 3, Raw("writing", mb.buf, mb.size));
1093  writeReply(mb);
1094 }
1095 
1097 void
1098 Ftp::Server::writeErrorReply(const HttpReply *reply, const int scode)
1099 {
1100  const HttpRequest *request = pipeline.front()->http->request;
1101  assert(request);
1102 
1103  MemBuf mb;
1104  mb.init();
1105 
1106  if (request->errType != ERR_NONE)
1107  mb.appendf("%i-%s\r\n", scode, errorPageName(request->errType));
1108 
1109  if (request->errDetail > 0) {
1110  // XXX: > 0 may not always mean that this is an errno
1111  mb.appendf("%i-Error: (%d) %s\r\n", scode,
1112  request->errDetail,
1113  strerror(request->errDetail));
1114  }
1115 
1116 #if USE_ADAPTATION
1117  // XXX: Remove hard coded names. Use an error page template instead.
1118  const Adaptation::History::Pointer ah = request->adaptHistory();
1119  if (ah != NULL) { // XXX: add adapt::<all_h but use lastMeta here
1120  const String info = ah->allMeta.getByName("X-Response-Info");
1121  const String desc = ah->allMeta.getByName("X-Response-Desc");
1122  if (info.size())
1123  mb.appendf("%i-Information: %s\r\n", scode, info.termedBuf());
1124  if (desc.size())
1125  mb.appendf("%i-Description: %s\r\n", scode, desc.termedBuf());
1126  }
1127 #endif
1128 
1129  Must(reply);
1130  const char *reason = reply->header.has(Http::HdrType::FTP_REASON) ?
1132  reply->sline.reason();
1133 
1134  mb.appendf("%i %s\r\n", scode, reason); // error terminating line
1135 
1136  // TODO: errorpage.cc should detect FTP client and use
1137  // configurable FTP-friendly error templates which we should
1138  // write to the client "as is" instead of hiding most of the info
1139 
1140  writeReply(mb);
1141 }
1142 
1145 void
1147 {
1148  changeState(fssConnected, "foreign reply");
1149  closeDataConnection();
1150  // 451: We intend to keep the control connection open.
1151  writeErrorReply(reply, 451);
1152 }
1153 
1154 bool
1156 {
1157  // the caller guarantees that we are dealing with the current context only
1158  // the caller should also make sure reply->header.has(Http::HdrType::FTP_STATUS)
1159  writeForwardedReplyAndCall(reply, call);
1160  return true;
1161 }
1162 
1163 void
1165 {
1166  assert(reply != NULL);
1167  const HttpHeader &header = reply->header;
1168 
1169  // without status, the caller must use the writeForwardedForeign() path
1172  const int scode = header.getInt(Http::HdrType::FTP_STATUS);
1173  debugs(33, 7, "scode: " << scode);
1174 
1175  // Status 125 or 150 implies upload or data request, but we still check
1176  // the state in case the server is buggy.
1177  if ((scode == 125 || scode == 150) &&
1178  (master->serverState == fssHandleUploadRequest ||
1179  master->serverState == fssHandleDataRequest)) {
1180  if (checkDataConnPost()) {
1181  // If the data connection is ready, start reading data (here)
1182  // and forward the response to client (further below).
1183  debugs(33, 7, "data connection established, start data transfer");
1184  if (master->serverState == fssHandleUploadRequest)
1185  maybeReadUploadData();
1186  } else {
1187  // If we are waiting to accept the data connection, keep waiting.
1188  if (Comm::IsConnOpen(dataListenConn)) {
1189  debugs(33, 7, "wait for the client to establish a data connection");
1190  onDataAcceptCall = call;
1191  // TODO: Add connect timeout for passive connections listener?
1192  // TODO: Remember server response so that we can forward it?
1193  } else {
1194  // Either the connection was establised and closed after the
1195  // data was transferred OR we failed to establish an active
1196  // data connection and already sent the error to the client.
1197  // In either case, there is nothing more to do.
1198  debugs(33, 7, "done with data OR active connection failed");
1199  }
1200  return;
1201  }
1202  }
1203 
1204  MemBuf mb;
1205  mb.init();
1206  Ftp::PrintReply(mb, reply);
1207 
1208  debugs(9, 2, "FTP Client " << clientConnection);
1209  debugs(9, 2, "FTP Client REPLY:\n---------\n" << mb.buf <<
1210  "\n----------");
1211 
1212  Comm::Write(clientConnection, &mb, call);
1213 }
1214 
1215 static void
1216 Ftp::PrintReply(MemBuf &mb, const HttpReply *reply, const char *const)
1217 {
1218  const HttpHeader &header = reply->header;
1219 
1221  while (const HttpHeaderEntry *e = header.getEntry(&pos)) {
1222  if (e->id == Http::HdrType::FTP_PRE) {
1223  String raw;
1224  if (httpHeaderParseQuotedString(e->value.rawBuf(), e->value.size(), &raw))
1225  mb.appendf("%s\r\n", raw.termedBuf());
1226  }
1227  }
1228 
1229  if (header.has(Http::HdrType::FTP_STATUS)) {
1230  const char *reason = header.getStr(Http::HdrType::FTP_REASON);
1231  mb.appendf("%i %s\r\n", header.getInt(Http::HdrType::FTP_STATUS),
1232  (reason ? reason : 0));
1233  }
1234 }
1235 
1236 void
1238 {
1239  if (io.flag == Comm::ERR_CLOSING)
1240  return;
1241 
1242  if (io.flag != Comm::OK) {
1243  debugs(33, 3, "FTP reply writing failed: " << xstrerr(io.xerrno));
1244  io.conn->close();
1245  return;
1246  }
1247 
1248  Http::StreamPointer context = pipeline.front();
1249  if (context != nullptr && context->http) {
1250  context->http->out.size += io.size;
1251  context->http->out.headers_sz += io.size;
1252  }
1253 
1254  flags.readMore = true;
1255  readSomeData();
1256 }
1257 
1258 void
1260 {
1261  if (io.flag == Comm::ERR_CLOSING)
1262  return;
1263 
1264  if (io.flag != Comm::OK) {
1265  debugs(33, 3, "FTP reply writing failed: " << xstrerr(io.xerrno));
1266  io.conn->close();
1267  return;
1268  }
1269 
1270  Http::StreamPointer context = pipeline.front();
1271  assert(context->http);
1272  context->http->out.size += io.size;
1273  context->http->out.headers_sz += io.size;
1274 
1275  if (master->serverState == fssError) {
1276  debugs(33, 5, "closing on FTP server error");
1277  io.conn->close();
1278  return;
1279  }
1280 
1281  const clientStream_status_t socketState = context->socketState();
1282  debugs(33, 5, "FTP client stream state " << socketState);
1283  switch (socketState) {
1285  case STREAM_FAILED:
1286  io.conn->close();
1287  return;
1288 
1289  case STREAM_NONE:
1290  case STREAM_COMPLETE:
1291  flags.readMore = true;
1292  changeState(fssConnected, "Ftp::Server::wroteReply");
1293  if (bodyParser)
1294  finishDechunkingRequest(false);
1295  context->finished();
1296  kick();
1297  return;
1298  }
1299 }
1300 
1301 bool
1303 {
1304  debugs(33, 9, request);
1305  Must(request);
1306 
1307  HttpHeader &header = request->header;
1312 
1313  if (Debug::Enabled(9, 2)) {
1314  MemBuf mb;
1315  mb.init();
1316  request->pack(&mb);
1317 
1318  debugs(9, 2, "FTP Client " << clientConnection);
1319  debugs(9, 2, "FTP Client REQUEST:\n---------\n" << mb.buf <<
1320  "\n----------");
1321  }
1322 
1323  // TODO: When HttpHeader uses SBuf, change keys to SBuf
1324  typedef std::map<const std::string, RequestHandler> RequestHandlers;
1325  static RequestHandlers handlers;
1326  if (!handlers.size()) {
1327  handlers["LIST"] = &Ftp::Server::handleDataRequest;
1328  handlers["NLST"] = &Ftp::Server::handleDataRequest;
1329  handlers["MLSD"] = &Ftp::Server::handleDataRequest;
1330  handlers["FEAT"] = &Ftp::Server::handleFeatRequest;
1331  handlers["PASV"] = &Ftp::Server::handlePasvRequest;
1332  handlers["PORT"] = &Ftp::Server::handlePortRequest;
1333  handlers["RETR"] = &Ftp::Server::handleDataRequest;
1334  handlers["EPRT"] = &Ftp::Server::handleEprtRequest;
1335  handlers["EPSV"] = &Ftp::Server::handleEpsvRequest;
1336  handlers["CWD"] = &Ftp::Server::handleCwdRequest;
1337  handlers["PASS"] = &Ftp::Server::handlePassRequest;
1338  handlers["CDUP"] = &Ftp::Server::handleCdupRequest;
1339  }
1340 
1341  RequestHandler handler = NULL;
1342  if (request->method == Http::METHOD_PUT)
1344  else {
1345  const RequestHandlers::const_iterator hi = handlers.find(cmd.termedBuf());
1346  if (hi != handlers.end())
1347  handler = hi->second;
1348  }
1349 
1350  if (!handler) {
1351  debugs(9, 7, "forwarding " << cmd << " as is, no post-processing");
1352  return true;
1353  }
1354 
1355  return (this->*handler)(cmd, params);
1356 }
1357 
1360 Http::Stream *
1362 {
1363  if (params.isEmpty())
1364  return earlyError(EarlyErrorKind::MissingUsername);
1365 
1366  // find the [end of] user name
1367  const SBuf::size_type eou = params.rfind('@');
1368  if (eou == SBuf::npos || eou + 1 >= params.length())
1369  return earlyError(EarlyErrorKind::MissingHost);
1370 
1371  // Determine the intended destination.
1372  host = params.substr(eou + 1, params.length());
1373  // If we can parse it as raw IPv6 address, then surround with "[]".
1374  // Otherwise (domain, IPv4, [bracketed] IPv6, garbage, etc), use as is.
1375  if (host.find(':') != SBuf::npos) {
1376  const Ip::Address ipa(host.c_str());
1377  if (!ipa.isAnyAddr()) {
1378  char ipBuf[MAX_IPSTRLEN];
1379  ipa.toHostStr(ipBuf, MAX_IPSTRLEN);
1380  host = ipBuf;
1381  }
1382  }
1383 
1384  // const SBuf login = params.substr(0, eou);
1385  params.chop(0, eou); // leave just the login part for the peer
1386 
1387  SBuf oldUri;
1388  if (master->clientReadGreeting)
1389  oldUri = uri;
1390 
1391  master->workingDir.clear();
1392  calcUri(NULL);
1393 
1394  if (!master->clientReadGreeting) {
1395  debugs(9, 3, "set URI to " << uri);
1396  } else if (oldUri.caseCmp(uri) == 0) {
1397  debugs(9, 5, "kept URI as " << oldUri);
1398  } else {
1399  debugs(9, 3, "reset URI from " << oldUri << " to " << uri);
1400  closeDataConnection();
1401  unpinConnection(true); // close control connection to peer
1402  resetLogin("URI reset");
1403  }
1404 
1405  return NULL; // no early errors
1406 }
1407 
1408 bool
1410 {
1411  changeState(fssHandleFeat, "handleFeatRequest");
1412  return true;
1413 }
1414 
1415 bool
1417 {
1418  if (gotEpsvAll) {
1419  setReply(500, "Bad PASV command");
1420  return false;
1421  }
1422 
1423  if (params.size() > 0) {
1424  setReply(501, "Unexpected parameter");
1425  return false;
1426  }
1427 
1428  changeState(fssHandlePasv, "handlePasvRequest");
1429  // no need to fake PASV request via setDataCommand() in true PASV case
1430  return true;
1431 }
1432 
1434 bool
1436 {
1437  assert(clientConnection != NULL);
1438  assert(!clientConnection->remote.isAnyAddr());
1439 
1440  if (cltAddr != clientConnection->remote) {
1441  debugs(33, 2, "rogue PORT " << cltAddr << " request? ctrl: " << clientConnection->remote);
1442  // Closing the control connection would not help with attacks because
1443  // the client is evidently able to connect to us. Besides, closing
1444  // makes retrials easier for the client and more damaging to us.
1445  setReply(501, "Prohibited parameter value");
1446  return false;
1447  }
1448 
1449  closeDataConnection();
1450 
1452  conn->flags |= COMM_DOBIND;
1453 
1454  if (clientConnection->flags & COMM_INTERCEPTION) {
1455  // In the case of NAT interception conn->local value is not set
1456  // because the TCP stack will automatically pick correct source
1457  // address for the data connection. We must only ensure that IP
1458  // version matches client's address.
1459  conn->local.setAnyAddr();
1460 
1461  if (cltAddr.isIPv4())
1462  conn->local.setIPv4();
1463 
1464  conn->remote = cltAddr;
1465  } else {
1466  // In the case of explicit-proxy the local IP of the control connection
1467  // is the Squid IP the client is knowingly talking to.
1468  //
1469  // In the case of TPROXY the IP address of the control connection is
1470  // server IP the client is connecting to, it can be spoofed by Squid.
1471  //
1472  // In both cases some clients may refuse to accept data connections if
1473  // these control connectin local-IP's are not used.
1474  conn->setAddrs(clientConnection->local, cltAddr);
1475 
1476  // Using non-local addresses in TPROXY mode requires appropriate socket option.
1477  if (clientConnection->flags & COMM_TRANSPARENT)
1478  conn->flags |= COMM_TRANSPARENT;
1479  }
1480 
1481  // RFC 959 requires active FTP connections to originate from port 20
1482  // but that would preclude us from supporting concurrent transfers! (XXX?)
1483  conn->local.port(0);
1484 
1485  debugs(9, 3, "will actively connect from " << conn->local << " to " <<
1486  conn->remote);
1487 
1488  dataConn = conn;
1489  uploadAvailSize = 0;
1490  return true;
1491 }
1492 
1493 bool
1495 {
1496  // TODO: Should PORT errors trigger closeDataConnection() cleanup?
1497 
1498  if (gotEpsvAll) {
1499  setReply(500, "Rejecting PORT after EPSV ALL");
1500  return false;
1501  }
1502 
1503  if (!params.size()) {
1504  setReply(501, "Missing parameter");
1505  return false;
1506  }
1507 
1508  Ip::Address cltAddr;
1509  if (!Ftp::ParseIpPort(params.termedBuf(), NULL, cltAddr)) {
1510  setReply(501, "Invalid parameter");
1511  return false;
1512  }
1513 
1514  if (!createDataConnection(cltAddr))
1515  return false;
1516 
1517  changeState(fssHandlePort, "handlePortRequest");
1518  setDataCommand();
1519  return true; // forward our fake PASV request
1520 }
1521 
1522 bool
1524 {
1525  if (!checkDataConnPre())
1526  return false;
1527 
1528  master->userDataDone = 0;
1529  originDataDownloadAbortedOnError = false;
1530 
1531  changeState(fssHandleDataRequest, "handleDataRequest");
1532 
1533  return true;
1534 }
1535 
1536 bool
1538 {
1539  if (!checkDataConnPre())
1540  return false;
1541 
1543  ClientHttpRequest *http = pipeline.front()->http;
1544  HttpRequest *request = http->request;
1545  ACLFilledChecklist bodyContinuationCheck(Config.accessList.forceRequestBodyContinuation, request, NULL);
1546  if (bodyContinuationCheck.fastCheck().allowed()) {
1547  request->forcedBodyContinuation = true;
1548  if (checkDataConnPost()) {
1549  // Write control Msg
1550  writeEarlyReply(150, "Data connection opened");
1551  maybeReadUploadData();
1552  } else {
1553  // wait for acceptDataConnection but tell it to call wroteEarlyReply
1554  // after writing "150 Data connection opened"
1556  AsyncCall::Pointer call = JobCallback(33, 5, Dialer, this, Ftp::Server::wroteEarlyReply);
1557  onDataAcceptCall = call;
1558  }
1559  }
1560  }
1561 
1562  changeState(fssHandleUploadRequest, "handleDataRequest");
1563 
1564  return true;
1565 }
1566 
1567 bool
1569 {
1570  debugs(9, 3, "Process an EPRT " << params);
1571 
1572  if (gotEpsvAll) {
1573  setReply(500, "Rejecting EPRT after EPSV ALL");
1574  return false;
1575  }
1576 
1577  if (!params.size()) {
1578  setReply(501, "Missing parameter");
1579  return false;
1580  }
1581 
1582  Ip::Address cltAddr;
1583  if (!Ftp::ParseProtoIpPort(params.termedBuf(), cltAddr)) {
1584  setReply(501, "Invalid parameter");
1585  return false;
1586  }
1587 
1588  if (!createDataConnection(cltAddr))
1589  return false;
1590 
1591  changeState(fssHandleEprt, "handleEprtRequest");
1592  setDataCommand();
1593  return true; // forward our fake PASV request
1594 }
1595 
1596 bool
1598 {
1599  debugs(9, 3, "Process an EPSV command with params: " << params);
1600  if (params.size() <= 0) {
1601  // treat parameterless EPSV as "use the protocol of the ctrl conn"
1602  } else if (params.caseCmp("ALL") == 0) {
1603  setReply(200, "EPSV ALL ok");
1604  gotEpsvAll = true;
1605  return false;
1606  } else if (params.cmp("2") == 0) {
1607  if (!Ip::EnableIpv6) {
1608  setReply(522, "Network protocol not supported, use (1)");
1609  return false;
1610  }
1611  } else if (params.cmp("1") != 0) {
1612  setReply(501, "Unsupported EPSV parameter");
1613  return false;
1614  }
1615 
1616  changeState(fssHandleEpsv, "handleEpsvRequest");
1617  setDataCommand();
1618  return true; // forward our fake PASV request
1619 }
1620 
1621 bool
1623 {
1624  changeState(fssHandleCwd, "handleCwdRequest");
1625  return true;
1626 }
1627 
1628 bool
1630 {
1631  changeState(fssHandlePass, "handlePassRequest");
1632  return true;
1633 }
1634 
1635 bool
1637 {
1638  changeState(fssHandleCdup, "handleCdupRequest");
1639  return true;
1640 }
1641 
1642 // Convert user PORT, EPRT, PASV, or EPSV data command to Squid PASV command.
1643 // Squid FTP client decides what data command to use with peers.
1644 void
1646 {
1647  ClientHttpRequest *const http = pipeline.front()->http;
1648  assert(http != NULL);
1649  HttpRequest *const request = http->request;
1650  assert(request != NULL);
1651  HttpHeader &header = request->header;
1653  header.putStr(Http::HdrType::FTP_COMMAND, "PASV");
1656  debugs(9, 5, "client data command converted to fake PASV");
1657 }
1658 
1661 bool
1663 {
1664  if (Comm::IsConnOpen(dataConn))
1665  return true;
1666 
1667  if (Comm::IsConnOpen(dataListenConn)) {
1668  // We are still waiting for a client to connect to us after PASV.
1669  // Perhaps client's data conn handshake has not reached us yet.
1670  // After we talk to the server, checkDataConnPost() will recheck.
1671  debugs(33, 3, "expecting clt data conn " << dataListenConn);
1672  return true;
1673  }
1674 
1675  if (!dataConn || dataConn->remote.isAnyAddr()) {
1676  debugs(33, 5, "missing " << dataConn);
1677  // TODO: use client address and default port instead.
1678  setReply(425, "Use PORT or PASV first");
1679  return false;
1680  }
1681 
1682  // active transfer: open a data connection from Squid to client
1684  connector = JobCallback(17, 3, Dialer, this, Ftp::Server::connectedForData);
1685  Comm::ConnOpener *cs = new Comm::ConnOpener(dataConn, connector,
1687  AsyncJob::Start(cs);
1688  return false; // ConnStateData::processFtpRequest waits handleConnectDone
1689 }
1690 
1692 bool
1694 {
1695  if (!Comm::IsConnOpen(dataConn)) {
1696  debugs(33, 3, "missing client data conn: " << dataConn);
1697  return false;
1698  }
1699  return true;
1700 }
1701 
1703 void
1705 {
1706  connector = NULL;
1707 
1708  if (params.flag != Comm::OK) {
1709  /* it might have been a timeout with a partially open link */
1710  if (params.conn != NULL)
1711  params.conn->close();
1712  setReply(425, "Cannot open data connection.");
1713  Http::StreamPointer context = pipeline.front();
1714  Must(context->http);
1715  Must(context->http->storeEntry() != NULL);
1716  } else {
1717  Must(dataConn == params.conn);
1718  Must(Comm::IsConnOpen(params.conn));
1719  fd_note(params.conn->fd, "active client ftp data");
1720  }
1721 
1722  doProcessRequest();
1723 }
1724 
1725 void
1726 Ftp::Server::setReply(const int code, const char *msg)
1727 {
1728  Http::StreamPointer context = pipeline.front();
1729  ClientHttpRequest *const http = context->http;
1730  assert(http != NULL);
1731  assert(http->storeEntry() == NULL);
1732 
1733  HttpReply *const reply = Ftp::HttpReplyWrapper(code, msg, Http::scNoContent, 0);
1734 
1735  setLogUri(http, urlCanonicalClean(http->request));
1736 
1737  clientStreamNode *const node = context->getClientReplyContext();
1738  clientReplyContext *const repContext =
1739  dynamic_cast<clientReplyContext *>(node->data.getRaw());
1740  assert(repContext != NULL);
1741 
1742  RequestFlags reqFlags;
1743  reqFlags.cachable = false; // force releaseRequest() in storeCreateEntry()
1744  reqFlags.noCache = true;
1745  repContext->createStoreEntry(http->request->method, reqFlags);
1746  http->storeEntry()->replaceHttpReply(reply);
1747 }
1748 
1749 void
1750 Ftp::Server::callException(const std::exception &e)
1751 {
1752  debugs(33, 2, "FTP::Server job caught: " << e.what());
1753  closeDataConnection();
1754  unpinConnection(true);
1755  if (Comm::IsConnOpen(clientConnection))
1756  clientConnection->close();
1758 }
1759 
1760 void
1762 {
1763  if (!isOpen()) // if we are closing, nothing to do
1764  return;
1765 
1766  debugs(33, 5, "waiting for Ftp::Client data transfer to end");
1767  waitingForOrigin = true;
1768 }
1769 
1770 void
1772 {
1773  Must(waitingForOrigin);
1774  waitingForOrigin = false;
1775 
1776  if (!isOpen()) // if we are closing, nothing to do
1777  return;
1778 
1779  // if we have already decided how to respond, respond now
1780  if (delayedReply) {
1781  HttpReply::Pointer reply = delayedReply;
1782  delayedReply = nullptr;
1783  writeForwardedReply(reply.getRaw());
1784  return; // do not completeDataDownload() after an earlier response
1785  }
1786 
1787  if (master->serverState != fssHandleDataRequest)
1788  return;
1789 
1790  // completeDataDownload() could be waitingForOrigin in fssHandleDataRequest
1791  // Depending on which side has finished downloading first, either trust
1792  // master->userDataDone status or set originDataDownloadAbortedOnError:
1793  if (master->userDataDone) {
1794  // We finished downloading before Ftp::Client. Most likely, the
1795  // adaptation shortened the origin response or we hit an error.
1796  // Our status (stored in master->userDataDone) is more informative.
1797  // Use master->userDataDone; avoid originDataDownloadAbortedOnError.
1798  completeDataDownload();
1799  } else {
1800  debugs(33, 5, "too early to write the response");
1801  // Ftp::Client naturally finished downloading before us. Set
1802  // originDataDownloadAbortedOnError to overwrite future
1803  // master->userDataDone and relay Ftp::Client error, if there was
1804  // any, to the user.
1805  originDataDownloadAbortedOnError = (originStatus >= 400);
1806  }
1807 }
1808 
1810 {
1811  Must(!master->userDataDone);
1812  master->userDataDone = finalStatusCode;
1813 
1814  if (bodyParser)
1815  finishDechunkingRequest(false);
1816 
1817  if (waitingForOrigin) {
1818  // The completeDataDownload() is not called here unconditionally
1819  // because we want to signal the FTP user that we are not fully
1820  // done processing its data stream, even though all data bytes
1821  // have been sent or received already.
1822  debugs(33, 5, "Transfering from FTP server is not complete");
1823  return;
1824  }
1825 
1826  // Adjust our reply if the server aborted with an error before we are done.
1827  if (master->userDataDone == 226 && originDataDownloadAbortedOnError) {
1828  debugs(33, 5, "Transfering from FTP server terminated with an error, adjust status code");
1829  master->userDataDone = 451;
1830  }
1831  completeDataDownload();
1832 }
1833 
1835 {
1836  writeCustomReply(master->userDataDone, master->userDataDone == 226 ? "Transfer complete" : "Server error; transfer aborted");
1837  closeDataConnection();
1838 }
1839 
1841 static bool
1843 {
1844  static std::set<SBuf> BlackList;
1845  if (BlackList.empty()) {
1846  /* Add FTP commands that Squid cannot relay correctly. */
1847 
1848  // We probably do not support AUTH TLS.* and AUTH SSL,
1849  // but let's disclaim all AUTH support to KISS, for now.
1850  BlackList.insert(cmdAuth());
1851  }
1852 
1853  // we claim support for all commands that we do not know about
1854  return BlackList.find(name) == BlackList.end();
1855 }
1856 
bool setIPv4()
Definition: Address.cc:217
const SBuf & cmdDele()
Definition: Elements.cc:77
int delById(Http::HdrType id)
Definition: HttpHeader.cc:672
int caseCmp(const SBuf &S, const size_type n) const
shorthand version for case-insensitive compare()
Definition: SBuf.h:273
void userDataCompletionCheckpoint(int finalStatusCode)
Definition: FtpServer.cc:1809
AnyP::ProtocolVersion ProtocolVersion(unsigned int aMajor, unsigned int aMinor)
HTTP version label information.
bool handleEpsvRequest(String &cmd, String &params)
Definition: FtpServer.cc:1597
AnyP::PortCfgPointer squidPort
the listening port which originated this transaction
Definition: MasterXaction.h:50
int cmp(char const *) const
Definition: String.cc:269
int has(Http::HdrType id) const
Definition: HttpHeader.cc:1002
void pack(Packable *p) const
Definition: HttpRequest.cc:354
#define HTTP_REQBUF_SZ
Definition: defines.h:216
#define JobCallback(dbgSection, dbgLevel, Dialer, job, method)
Convenience macro to create a Dialer-based job callback.
Definition: AsyncJobCalls.h:68
virtual void handleReply(HttpReply *header, StoreIOBuffer receivedData) override
Definition: FtpServer.cc:775
err_type errType
Definition: HttpRequest.h:149
void writeReply(MemBuf &mb)
Definition: FtpServer.cc:490
bool handleDataRequest(String &cmd, String &params)
Definition: FtpServer.cc:1523
bool handlePortRequest(String &cmd, String &params)
Definition: FtpServer.cc:1494
StatCounters statCounter
Definition: StatCounters.cc:12
#define assert(EX)
Definition: assert.h:17
void handleDataReply(const HttpReply *header, StoreIOBuffer receivedData)
Definition: FtpServer.cc:946
bool isOpen(const int fd)
Definition: comm.cc:86
bool checkDataConnPre()
Definition: FtpServer.cc:1662
char * strerror(int ern)
Definition: strerror.c:22
ServerState
Definition: FtpServer.h:20
int caseCmp(char const *) const
Definition: String.cc:299
void clientStreamInit(dlink_list *list, CSR *func, CSD *rdetach, CSS *readstatus, ClientStreamData readdata, CSCB *callback, CSD *cdetach, ClientStreamData callbackdata, StoreIOBuffer tailBuffer)
const SBuf & cmdList()
Definition: Elements.cc:98
#define CallJobHere(debugSection, debugLevel, job, Class, method)
Definition: AsyncJobCalls.h:57
#define HttpHeaderInitPos
Definition: HttpHeader.h:48
char reqbuf[HTTP_REQBUF_SZ]
Definition: Stream.h:134
virtual time_t idleTimeout() const override
timeout to use when waiting for the next request
Definition: FtpServer.cc:85
virtual void append(const char *c, int sz)
Definition: MemBuf.cc:225
AnyP::ProtocolVersion ProtocolVersion()
Protocol version to use in Http::Message structures wrapping FTP messages.
Definition: Elements.cc:24
Http::Stream * earlyError(const EarlyErrorKind eek)
creates a context filled with an error message for a given early error
Definition: FtpServer.cc:565
static const CharacterSet LF
Definition: CharacterSet.h:89
int errDetail
errType-specific detail about the transaction error
Definition: HttpRequest.h:150
void fd_note(int fd, const char *s)
Definition: fd.cc:251
Definition: Server.h:28
void handlePasvReply(const HttpReply *header, StoreIOBuffer receivedData)
Definition: FtpServer.cc:884
const SBuf & cmdMlst()
Definition: Elements.cc:119
bool ParseProtoIpPort(const char *buf, Ip::Address &addr)
Definition: Parsing.cc:52
int httpHeaderParseQuotedString(const char *start, const int len, String *val)
bool ftpNative
carries a representation of an FTP command [received on ftp_port]
Definition: RequestFlags.h:105
int NHttpSockets
Definition: PortCfg.cc:24
Definition: SBuf.h:87
const SBuf & cmdRnfr()
Definition: Elements.cc:147
SQUIDCEXTERN CSD clientReplyDetach
Definition: client_side.h:446
struct StatCounters::@128 client_http
const SBuf & cmdRnto()
Definition: Elements.cc:154
void comm_open_listener(int sock_type, int proto, Comm::ConnectionPointer &conn, const char *note)
Definition: comm.cc:232
const SBuf & cmdRmd()
Definition: Elements.cc:140
HttpRequestMethod method
Definition: HttpRequest.h:102
unsigned int listenForDataConnection()
Definition: FtpServer.cc:365
void setLogUri(ClientHttpRequest *http, char const *uri, bool cleanUrl)
const SBuf & cmdCwd()
Definition: Elements.cc:70
acl_access * forceRequestBodyContinuation
Definition: SquidConfig.h:400
struct _request * request(char *urlin)
Definition: tcp-banger2.c:291
#define xstrdup
Transaction information shared among our FTP client and server jobs.
Definition: FtpServer.h:39
void maybeReadUploadData()
schedules another data connection read if needed
Definition: FtpServer.cc:108
static bool CommandHasPathParameter(const SBuf &cmd)
whether the given FTP command has a pathname parameter
Definition: FtpServer.cc:539
Definition: Flag.h:16
bool forcedBodyContinuation
whether we have responded with HTTP 100 or FTP 150 already
Definition: HttpRequest.h:183
virtual void callException(const std::exception &e)
called when the job throws during an async call
Definition: AsyncJob.cc:127
SBuf & chop(size_type pos, size_type n=npos)
Definition: SBuf.cc:560
void StopListening()
reject new connections to any configured ftp_port
Definition: FtpServer.cc:285
void HTTPMSGLOCK(Http::Message *a)
Definition: Message.h:154
const char * reason() const
retrieve the reason string for this status line
Definition: StatusLine.cc:40
virtual bool writeControlMsgAndCall(HttpReply *rep, AsyncCall::Pointer &call) override
handle a control message received by context from a peer and call back
Definition: FtpServer.cc:1155
void clear()
Definition: SBuf.cc:190
clientStreamNode * getClientReplyContext() const
Definition: Stream.cc:547
HttpHeaderEntry * getEntry(HttpHeaderPos *pos) const
Definition: HttpHeader.cc:589
void toUpper()
converts all characters to upper case;
Definition: SBuf.cc:854
#define COMM_INTERCEPTION
Definition: Connection.h:49
AnyP::ProtocolVersion http_ver
Definition: Message.h:72
bool isEmpty() const
Definition: SBuf.h:422
void setDataCommand()
Definition: FtpServer.cc:1645
#define DBG_CRITICAL
Definition: Debug.h:44
int conn
the current server connection FD
Definition: Transport.cc:26
CBDATA_NAMESPACED_CLASS_INIT(Ftp, Server)
String getByName(const SBuf &name) const
Definition: HttpHeader.cc:879
void writeForwardedReply(const HttpReply *reply)
Definition: FtpServer.cc:1039
void wroteEarlyReply(const CommIoCbParams &io)
Definition: FtpServer.cc:1237
int getInt(Http::HdrType id) const
Definition: HttpHeader.cc:1160
void setReplyToReply(HttpReply *reply)
creates a store entry for the reply and appends error reply to it
size_type size() const
Definition: SquidString.h:71
bool ParseIpPort(const char *buf, const char *forceIp, Ip::Address &addr)
parses and validates "A1,A2,A3,A4,P1,P2" IP,port sequence
Definition: Parsing.cc:18
void clientSetKeepaliveFlag(ClientHttpRequest *http)
decide whether to expect multiple requests on the corresponding connection
Definition: client_side.cc:641
void wroteReply(const CommIoCbParams &io)
Definition: FtpServer.cc:1259
void startWaitingForOrigin()
Definition: FtpServer.cc:1761
void replaceHttpReply(HttpReply *, bool andStartWriting=true)
Definition: store.cc:1854
const SBuf & cmdRetr()
Definition: Elements.cc:133
ByteCounter kbytes_in
Definition: StatCounters.h:43
const SBuf & cmdNlst()
Definition: Elements.cc:126
void connectedForData(const CommConnectCbParams &params)
Done establishing a data connection to the user.
Definition: FtpServer.cc:1704
virtual void processParsedRequest(Http::StreamPointer &context) override
start processing a freshly parsed request
Definition: FtpServer.cc:155
void init(mb_size_t szInit, mb_size_t szMax)
Definition: MemBuf.cc:105
const SBuf & cmdSmnt()
Definition: Elements.cc:161
static bool SupportedCommand(const SBuf &name)
Whether Squid FTP Relay supports a named feature (e.g., a command).
Definition: FtpServer.cc:1842
void completeDataDownload()
Definition: FtpServer.cc:1834
static Pointer Start(AsyncJob *job)
starts a freshly created job (i.e., makes the job asynchronous)
Definition: AsyncJob.cc:23
bool handlePassRequest(String &cmd, String &params)
Definition: FtpServer.cc:1629
bool handleRequest(HttpRequest *)
Definition: FtpServer.cc:1302
Manages a control connection from an FTP client.
Definition: FtpServer.h:55
#define COMM_DOBIND
Definition: Connection.h:47
Comm::ConnectionPointer conn
Definition: CommCalls.h:85
const char * xstrerr(int error)
Definition: xstrerror.cc:83
bool IsConnOpen(const Comm::ConnectionPointer &conn)
Definition: Connection.cc:24
AnyP::PortCfgPointer FtpPortList
list of Squid ftp_port configured
Definition: PortCfg.cc:22
void const char HLPCB void * data
Definition: stub_helper.cc:16
size_type length() const
Returns the number of bytes stored in SBuf.
Definition: SBuf.h:405
Definition: parse.c:104
void setReply(const int code, const char *msg)
Definition: FtpServer.cc:1726
char uploadBuf[CLIENT_REQ_BUF_SZ]
data connection input buffer
Definition: FtpServer.h:187
void handleEpsvReply(const HttpReply *header, StoreIOBuffer receivedData)
Definition: FtpServer.cc:1075
virtual void clientPinnedConnectionClosed(const CommCloseCbParams &io)
Our close handler called by Comm when the pinned connection is closed.
#define debugs(SECTION, LEVEL, CONTENT)
Definition: Debug.h:123
Adaptation::History::Pointer adaptHistory(bool createIfNone=false) const
Returns possibly nil history, creating it if requested.
Definition: HttpRequest.cc:414
#define DBG_IMPORTANT
Definition: Debug.h:45
void writeEarlyReply(const int code, const char *msg)
Definition: FtpServer.cc:471
void clientProcessRequest(ConnStateData *conn, const Http1::RequestParserPointer &hp, Http::Stream *context)
time_t ftpClientIdle
Definition: SquidConfig.h:111
HttpHeaderEntry * findEntry(Http::HdrType id) const
Definition: HttpHeader.cc:608
mb_size_t size
Definition: MemBuf.h:135
HttpHeader allMeta
All REQMOD and RESPMOD meta headers merged. Last field wins conflicts.
Definition: History.h:62
void handleErrorReply(const HttpReply *header, StoreIOBuffer receivedData)
Definition: FtpServer.cc:937
int xerrno
The last errno to occur. non-zero if flag is Comm::COMM_ERROR.
Definition: CommCalls.h:88
void writeForwardedForeign(const HttpReply *reply)
Definition: FtpServer.cc:1146
void stopWaitingForOrigin(int status)
Definition: FtpServer.cc:1771
SQUIDCEXTERN CSR clientGetMoreData
Definition: client_side.h:444
char const * termedBuf() const
Definition: SquidString.h:90
void calcUri(const SBuf *file)
computes uri member from host and, if tracked, working dir with file name
Definition: FtpServer.cc:340
void comm_read(const Comm::ConnectionPointer &conn, char *buf, int len, AsyncCall::Pointer &callback)
Definition: Read.h:57
SBuf::size_type parsedSize() const
number of parsed bytes, including skipped ones
Definition: Tokenizer.h:38
const char * errorPageName(int pageId)
error ID to string
Definition: errorpage.cc:541
StoreEntry * storeEntry() const
virtual void notePeerConnection(Comm::ConnectionPointer conn) override
called just before a FwdState-dispatched job starts using connection
Definition: FtpServer.cc:297
static void PrintReply(MemBuf &mb, const HttpReply *reply, const char *const prefix="")
Definition: FtpServer.cc:1216
void * addr
Definition: membanger.c:46
void fatal(const char *message)
Definition: fatal.cc:39
void handleFeatReply(const HttpReply *header, StoreIOBuffer receivedData)
Definition: FtpServer.cc:815
void clientStartListeningOn(AnyP::PortCfgPointer &port, const RefCount< CommCbFunPtrCallT< CommAcceptCbPtrFun > > &subCall, const Ipc::FdNoteId fdNote)
accept requests to a given port and inform subCall about them
static void AcceptCtrlConnection(const CommAcceptCbParams &params)
accept a new FTP control connection and hand it to a dedicated Server
Definition: FtpServer.cc:241
void handleEprtReply(const HttpReply *header, StoreIOBuffer receivedData)
Definition: FtpServer.cc:1062
struct SquidConfig::@113 accessList
int incoming_sockets_accepted
bool allowed() const
Definition: Acl.h:141
unsigned short comm_local_port(int fd)
Definition: comm.cc:160
MasterState::Pointer master
info shared among our FTP client and server jobs
Definition: FtpServer.h:77
void acceptDataConnection(const CommAcceptCbParams &params)
Definition: FtpServer.cc:396
const char * c_str()
Definition: SBuf.cc:546
optimized set of C chars, with quick membership test and merge support
Definition: CharacterSet.h:17
virtual void noteMoreBodySpaceAvailable(BodyPipe::Pointer) override
Definition: FtpServer.cc:221
void changeState(const Ftp::ServerState newState, const char *reason)
Definition: FtpServer.cc:524
ClientStreamData data
Definition: clientStream.h:94
struct Http::Stream::@80 flags
Http::StatusLine sline
Definition: HttpReply.h:60
Definition: parse.c:160
bool handleCwdRequest(String &cmd, String &params)
Definition: FtpServer.cc:1622
bool handleUploadRequest(String &cmd, String &params)
Definition: FtpServer.cc:1537
#define MAXTCPLISTENPORTS
Definition: PortCfg.h:78
static int port
Definition: ldap_backend.cc:69
bool isIPv4() const
Definition: Address.cc:151
void refreshMask()
Definition: HttpHeader.cc:728
void resetLogin(const char *reason)
clear client and server login-related state after the old login is gone
Definition: FtpServer.cc:331
clientStream_status_t
Definition: enums.h:88
static void handler(int signo)
Definition: purge.cc:860
static HttpRequest * FromUrl(const char *url, const MasterXaction::Pointer &, const HttpRequestMethod &method=Http::METHOD_GET)
Definition: HttpRequest.cc:523
const SBuf & cmdMkd()
Definition: Elements.cc:105
const SBuf & cmdEprt()
Definition: Elements.cc:84
unsigned char code
Definition: html_quote.c:20
void const char * buf
Definition: stub_helper.cc:16
ssize_t HttpHeaderPos
Definition: HttpHeader.h:45
void commSetTcpKeepalive(int fd, int idle, int interval, int timeout)
Definition: comm.cc:1176
unsigned short port() const
Definition: Address.cc:786
bool skip(const SBuf &tokenToSkip)
Definition: Tokenizer.cc:160
#define Must(cond)
Definition: TextException.h:89
Ip::Address local
Definition: Connection.h:135
const SBuf & cmdEpsv()
Definition: Elements.cc:91
HttpHeader header
Definition: Message.h:74
void StartListening()
accept connections on all configured ftp_ports
Definition: FtpServer.cc:266
bool prefix(SBuf &returnedToken, const CharacterSet &tokenChars, SBuf::size_type limit=SBuf::npos)
Definition: Tokenizer.cc:79
void writeErrorReply(const HttpReply *reply, const int status)
writes FTP error response with given status and reply-derived error details
Definition: FtpServer.cc:1098
char * buf
Definition: MemBuf.h:134
Server(const MasterXaction::Pointer &xact)
Definition: FtpServer.cc:52
RequestFlags flags
Definition: HttpRequest.h:129
void writeForwardedReplyAndCall(const HttpReply *reply, AsyncCall::Pointer &call)
Definition: FtpServer.cc:1164
Ip::Address remote
Definition: Connection.h:138
#define COMM_TRANSPARENT
Definition: Connection.h:48
allow_t const & fastCheck()
Definition: Checklist.cc:336
void putStr(Http::HdrType id, const char *str)
Definition: HttpHeader.cc:1063
MasterXaction::Pointer xaction
Transaction which this call is part of.
Definition: CommCalls.h:105
static char server[MAXLINE]
virtual int pipelinePrefetchMax() const override
returning N allows a pipeline of 1+N requests (see pipeline_prefetch)
Definition: FtpServer.cc:79
const SBuf & remaining() const
the remaining unprocessed section of buffer
Definition: Tokenizer.h:44
Http::Stream * handleUserRequest(const SBuf &cmd, SBuf &params)
Definition: FtpServer.cc:1361
void setAnyAddr()
NOTE: Does NOT clear the Port stored. Ony the Address and Type.
Definition: Address.cc:170
SQUIDCEXTERN CSS clientReplyStatus
Definition: client_side.h:445
bool handlePasvRequest(String &cmd, String &params)
Definition: FtpServer.cc:1416
CSCB clientSocketRecipient
Definition: client_side.h:447
unsigned int toHostStr(char *buf, const unsigned int len) const
Definition: Address.cc:860
void createStoreEntry(const HttpRequestMethod &m, RequestFlags flags)
SBuf & trim(const SBuf &toRemove, bool atBeginning=true, bool atEnd=true)
Definition: SBuf.cc:581
Comm::Flag flag
comm layer result status.
Definition: CommCalls.h:87
time_t connect
Definition: SquidConfig.h:105
const SBuf & cmdMlsd()
Definition: Elements.cc:112
const SBuf & cmdAuth()
Definition: Elements.cc:63
void appendf(const char *fmt,...) PRINTF_FORMAT_ARG2
Append operation with printf-style arguments.
Definition: Packable.h:61
struct ConnStateData::@39 flags
const SBuf & cmdAppe()
Definition: Elements.cc:56
size_t HttpReply *STUB StoreEntry const KeyScope scope const HttpRequestMethod & method
Definition: stub_store.cc:126
void closeDataConnection()
Definition: FtpServer.cc:440
static const size_type npos
Definition: SBuf.h:93
static const CharacterSet SP
Definition: CharacterSet.h:91
int EnableIpv6
Whether IPv6 is supported and type of support.
Definition: tools.h:25
Definition: MemBuf.h:23
bool createDataConnection(Ip::Address cltAddr)
[Re]initializes dataConn for active data transfers. Does not connect.
Definition: FtpServer.cc:1435
const SBuf & cmdUser()
Definition: Elements.cc:189
#define TexcHere(msg)
Definition: TextException.h:81
struct SquidConfig::@98 Timeout
SBuf::size_type skipAll(const CharacterSet &discardables)
Definition: Tokenizer.cc:120
CSD clientSocketDetach
Definition: client_side.h:448
CommCbFunPtrCallT< Dialer > * commCbCall(int debugSection, int debugLevel, const char *callName, const Dialer &dialer)
Definition: CommCalls.h:342
const char * getStr(Http::HdrType id) const
Definition: HttpHeader.cc:1203
CharacterSet complement(const char *complementLabel=nullptr) const
Definition: CharacterSet.cc:67
#define MAX_IPSTRLEN
Length of buffer that needs to be allocated to old a null-terminated IP-string.
Definition: forward.h:23
void handlePortReply(const HttpReply *header, StoreIOBuffer receivedData)
Definition: FtpServer.cc:924
void readUploadData(const CommIoCbParams &io)
imports more upload data from the data connection
Definition: FtpServer.cc:167
virtual ~Server() override
Definition: FtpServer.cc:73
#define COMM_NONBLOCKING
Definition: Connection.h:44
size_type rfind(char c, size_type endPos=npos) const
Definition: SBuf.cc:722
Definition: Debug.h:179
void addEntry(HttpHeaderEntry *e)
Definition: HttpHeader.cc:742
bool handleCdupRequest(String &cmd, String &params)
Definition: FtpServer.cc:1636
void shovelUploadData()
shovel upload data from the internal buffer to the body pipe if possible
Definition: FtpServer.cc:201
char * toStr(char *buf, const unsigned int blen, int force=AF_UNSPEC) const
Definition: Address.cc:810
virtual void clientPinnedConnectionClosed(const CommCloseCbParams &io) override
Our close handler called by Comm when the pinned connection is closed.
Definition: FtpServer.cc:311
void doProcessRequest()
react to the freshly parsed request
Definition: FtpServer.cc:127
bool handleFeatRequest(String &cmd, String &params)
Definition: FtpServer.cc:1409
const SBuf & cmdStat()
Definition: Elements.cc:168
void ReadCancel(int fd, AsyncCall::Pointer &callback)
Cancel the read pending on FD. No action if none pending.
Definition: Read.cc:216
static bool Enabled(const int section, const int level)
whether debugging the given section and the given level produces output
Definition: Debug.h:73
void setAddrs(const Ip::Address &aLocal, const Ip::Address &aRemote)
Definition: Connection.h:92
ServerState serverState
what our FTP server is doing
Definition: FtpServer.h:48
bool handleEprtRequest(String &cmd, String &params)
Definition: FtpServer.cc:1568
MemBlob::size_type size_type
Definition: SBuf.h:90
void wroteReplyData(const CommIoCbParams &io)
called when we are done writing a chunk of the response data
Definition: FtpServer.cc:989
void replyDataWritingCheckpoint()
ClientStream checks after (actual or skipped) reply data writing.
Definition: FtpServer.cc:1007
virtual void start() override
called by AsyncStart; do not call directly
Definition: FtpServer.cc:91
SBuf substr(size_type pos, size_type n=npos) const
Definition: SBuf.cc:606
C * getRaw() const
Definition: RefCount.h:74
void handleUploadReply(const HttpReply *header, StoreIOBuffer receivedData)
Definition: FtpServer.cc:1032
Comm::ConnectionPointer tcpClient
the client TCP connection which originated this transaction
Definition: MasterXaction.h:53
class SquidConfig Config
Definition: SquidConfig.cc:12
#define NULL
Definition: types.h:166
virtual Http::Stream * parseOneRequest() override
Definition: FtpServer.cc:635
A const & min(A const &lhs, A const &rhs)
bool checkDataConnPost() const
Check that client data connection is ready for immediate I/O.
Definition: FtpServer.cc:1693
#define false
Definition: GnuRegex.c:233
void Write(const Comm::ConnectionPointer &conn, const char *buf, int size, AsyncCall::Pointer &callback, FREE *free_func)
Definition: Write.cc:35
virtual void start()
called by AsyncStart; do not call directly
virtual void noteBodyConsumerAborted(BodyPipe::Pointer)=0
char * urlCanonicalClean(const HttpRequest *request)
Definition: url.cc:518
HttpReply * HttpReplyWrapper(const int ftpStatus, const char *ftpReason, const Http::StatusCode httpStatus, const int64_t clen)
Create an internal HttpReply structure to house FTP control response info.
Definition: Elements.cc:30
const SBuf & cmdStor()
Definition: Elements.cc:175
size_t maxRequestHeaderSize
Definition: SquidConfig.h:124
void writeCustomReply(const int code, const char *msg, const HttpReply *reply=NULL)
Definition: FtpServer.cc:502
Http::StatusCode status() const
retrieve the status code for this status line
Definition: StatusLine.h:45
virtual void noteBodyConsumerAborted(BodyPipe::Pointer ptr) override
Definition: FtpServer.cc:230
const SBuf & cmdStou()
Definition: Elements.cc:182
unsigned parsed_ok
Was this parsed correctly?
Definition: Stream.h:137
virtual void callException(const std::exception &e) override
called when the job throws during an async call
Definition: FtpServer.cc:1750

 

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