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Add emulation of /dev/zero for network testing
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@ -316,6 +316,9 @@ private:
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/// \brief Whether MLST unix.mode fact is enabled
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bool m_mlstUnixMode : 1;
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/// \brief Whether emulating /dev/zero
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bool m_devZero : 1;
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/// \brief Abort a transfer
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/// \param args_ Command arguments
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void ABOR (char const *args_);
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@ -203,9 +203,23 @@ bool fs::File::readAll (void *const buffer_, std::size_t const size_)
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std::make_signed_t<std::size_t> fs::File::write (void const *const buffer_, std::size_t const size_)
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{
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assert (buffer_);
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assert (size_ > 0);
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return std::fwrite (buffer_, 1, size_, m_fp.get ());
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}
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std::make_signed_t<std::size_t> fs::File::write (IOBuffer &buffer_)
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{
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assert (buffer_.usedSize () > 0);
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auto const rc = write (buffer_.usedArea (), buffer_.usedSize ());
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if (rc > 0)
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buffer_.markFree (rc);
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return rc;
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}
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bool fs::File::writeAll (void const *const buffer_, std::size_t const size_)
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{
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assert (buffer_);
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@ -279,7 +279,8 @@ FtpSession::FtpSession (FtpConfig &config_, UniqueSocket commandSocket_)
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m_mlstSize (true),
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m_mlstModify (true),
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m_mlstPerm (true),
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m_mlstUnixMode (false)
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m_mlstUnixMode (false),
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m_devZero (false)
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{
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if (m_config.user ().empty ())
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m_authorizedUser = true;
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@ -612,6 +613,7 @@ void FtpSession::setState (State const state_, bool const closePasv_, bool const
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m_workItem.clear ();
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}
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m_devZero = false;
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m_file.close ();
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m_dir.close ();
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}
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@ -1055,7 +1057,11 @@ void FtpSession::xferFile (char const *const args_, XferFileMode const mode_)
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return;
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}
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if (mode_ == XferFileMode::RETR)
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if (path == "/devZero")
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{
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m_devZero = true;
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}
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else if (mode_ == XferFileMode::RETR)
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{
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// stat the file
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struct stat st;
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@ -1709,29 +1715,34 @@ bool FtpSession::retrieveTransfer ()
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{
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m_xferBuffer.clear ();
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auto const buffer = m_xferBuffer.freeArea ();
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auto const size = m_xferBuffer.freeSize ();
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// we have sent all the data, so read some more
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auto const rc = m_file.read (buffer, size);
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if (rc < 0)
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if (!m_devZero)
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{
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// failed to read data
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sendResponse ("451 %s\r\n", std::strerror (errno));
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setState (State::COMMAND, true, true);
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return false;
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}
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// we have sent all the data, so read some more
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auto const rc = m_file.read (m_xferBuffer);
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if (rc < 0)
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{
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// failed to read data
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sendResponse ("451 %s\r\n", std::strerror (errno));
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setState (State::COMMAND, true, true);
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return false;
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}
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if (rc == 0)
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if (rc == 0)
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{
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// reached end of file
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sendResponse ("226 OK\r\n");
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setState (State::COMMAND, true, true);
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return false;
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}
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}
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else
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{
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// reached end of file
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sendResponse ("226 OK\r\n");
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setState (State::COMMAND, true, true);
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return false;
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}
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auto const buffer = m_xferBuffer.freeArea ();
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auto const size = m_xferBuffer.freeSize ();
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// we read some data
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m_xferBuffer.markUsed (rc);
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std::memset (buffer, 0, size);
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m_xferBuffer.markUsed (size);
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}
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}
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// send any pending data
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@ -1780,19 +1791,27 @@ bool FtpSession::storeTransfer ()
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}
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}
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// write any pending data
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auto const rc = m_file.write (m_xferBuffer.usedArea (), m_xferBuffer.usedSize ());
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if (rc <= 0)
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if (!m_devZero)
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{
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// error writing data
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sendResponse ("426 %s\r\n", rc < 0 ? std::strerror (errno) : "Failed to write data");
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setState (State::COMMAND, true, true);
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return false;
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// write any pending data
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auto const rc = m_file.write (m_xferBuffer);
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if (rc <= 0)
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{
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// error writing data
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sendResponse ("426 %s\r\n", rc < 0 ? std::strerror (errno) : "Failed to write data");
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setState (State::COMMAND, true, true);
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return false;
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}
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// we can try to recv/write more data
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LOCKED (m_filePosition += rc);
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}
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else
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{
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LOCKED (m_filePosition += m_xferBuffer.usedSize ());
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m_xferBuffer.clear ();
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}
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// we can try to recv/write more data
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LOCKED (m_filePosition += rc);
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m_xferBuffer.markFree (rc);
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return true;
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}
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