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