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- /* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
- * Copyright (C) 2005 Martin Koegler
- * Copyright (C) 2010 TigerVNC Team
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This software is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
- #ifdef HAVE_CONFIG_H
- #include <config.h>
- #endif
-
- #include <rdr/Exception.h>
- #include <rdr/TLSException.h>
- #include <rdr/TLSOutStream.h>
- #include <errno.h>
-
- #ifdef HAVE_GNUTLS
- using namespace rdr;
-
- enum { DEFAULT_BUF_SIZE = 16384 };
-
- ssize_t TLSOutStream::push(gnutls_transport_ptr_t str, const void* data,
- size_t size)
- {
- TLSOutStream* self= (TLSOutStream*) str;
- OutStream *out = self->out;
-
- try {
- out->writeBytes(data, size);
- out->flush();
- } catch (Exception& e) {
- gnutls_transport_set_errno(self->session, EINVAL);
- return -1;
- }
-
- return size;
- }
-
- TLSOutStream::TLSOutStream(OutStream* _out, gnutls_session_t _session)
- : session(_session), out(_out), bufSize(DEFAULT_BUF_SIZE), offset(0)
- {
- gnutls_transport_ptr_t recv, send;
-
- ptr = start = new U8[bufSize];
- end = start + bufSize;
-
- gnutls_transport_set_push_function(session, push);
- gnutls_transport_get_ptr2(session, &recv, &send);
- gnutls_transport_set_ptr2(session, recv, this);
- }
-
- TLSOutStream::~TLSOutStream()
- {
- #if 0
- try {
- // flush();
- } catch (Exception&) {
- }
- #endif
- gnutls_transport_set_push_function(session, NULL);
-
- delete [] start;
- }
-
- size_t TLSOutStream::length()
- {
- return offset + ptr - start;
- }
-
- void TLSOutStream::flush()
- {
- U8* sentUpTo = start;
- while (sentUpTo < ptr) {
- size_t n = writeTLS(sentUpTo, ptr - sentUpTo);
- sentUpTo += n;
- offset += n;
- }
-
- ptr = start;
- out->flush();
- }
-
- size_t TLSOutStream::overrun(size_t itemSize, size_t nItems)
- {
- if (itemSize > bufSize)
- throw Exception("TLSOutStream overrun: max itemSize exceeded");
-
- flush();
-
- size_t nAvail;
- nAvail = (end - ptr) / itemSize;
- if (nAvail < nItems)
- return nAvail;
-
- return nItems;
- }
-
- size_t TLSOutStream::writeTLS(const U8* data, size_t length)
- {
- int n;
-
- n = gnutls_record_send(session, data, length);
- if (n == GNUTLS_E_INTERRUPTED || n == GNUTLS_E_AGAIN)
- return 0;
-
- if (n < 0)
- throw TLSException("writeTLS", n);
-
- return n;
- }
-
- #endif
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