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102 lines
2.4 KiB
C++
102 lines
2.4 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/TLSInStream.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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ssize_t TLSInStream::pull(gnutls_transport_ptr_t str, void* data, size_t size)
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{
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TLSInStream* self= (TLSInStream*) str;
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InStream *in = self->in;
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try {
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if (!in->check(1, false)) {
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gnutls_transport_set_errno(self->session, EAGAIN);
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return -1;
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}
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if (in->avail() < size)
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size = in->avail();
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in->readBytes(data, size);
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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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TLSInStream::TLSInStream(InStream* _in, gnutls_session_t _session)
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: session(_session), in(_in)
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{
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gnutls_transport_ptr_t recv, send;
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gnutls_transport_set_pull_function(session, pull);
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gnutls_transport_get_ptr2(session, &recv, &send);
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gnutls_transport_set_ptr2(session, this, send);
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}
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TLSInStream::~TLSInStream()
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{
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gnutls_transport_set_pull_function(session, NULL);
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}
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bool TLSInStream::fillBuffer(size_t maxSize, bool wait)
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{
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size_t n = readTLS((U8*) end, maxSize, wait);
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if (!wait && n == 0)
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return false;
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end += n;
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return true;
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}
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size_t TLSInStream::readTLS(U8* buf, size_t len, bool wait)
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{
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int n;
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if (gnutls_record_check_pending(session) == 0) {
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n = in->check(1, wait);
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if (n == 0)
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return 0;
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}
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n = gnutls_record_recv(session, (void *) buf, len);
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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) throw TLSException("readTLS", n);
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return n;
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}
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#endif
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