mirror of
https://gitlab.uni-freiburg.de/opensourcevdi/spice
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68 lines
2.4 KiB
C++
68 lines
2.4 KiB
C++
/*
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Copyright (C) 2009-2016 Red Hat, Inc.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <fcntl.h>
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#include "common-graphics-channel.h"
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#include "dcc.h"
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#include "red-client.h"
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uint8_t *CommonGraphicsChannelClient::alloc_recv_buf(uint16_t type, uint32_t size)
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{
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/* SPICE_MSGC_MIGRATE_DATA is the only client message whose size is dynamic */
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if (type == SPICE_MSGC_MIGRATE_DATA) {
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return static_cast<uint8_t *>(g_malloc(size));
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}
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if (size > sizeof(recv_buf)) {
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spice_warning("unexpected message size %u (max is %zd)", size, sizeof(recv_buf));
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return nullptr;
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}
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return recv_buf;
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}
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void CommonGraphicsChannelClient::release_recv_buf(uint16_t type, uint32_t size, uint8_t* msg)
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{
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if (type == SPICE_MSGC_MIGRATE_DATA) {
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g_free(msg);
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}
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}
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bool CommonGraphicsChannelClient::config_socket()
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{
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RedClient *client = get_client();
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MainChannelClient *mcc = client->get_main();
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RedStream *stream = get_stream();
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gboolean is_low_bandwidth;
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// TODO - this should be dynamic, not one time at channel creation
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is_low_bandwidth = mcc->is_low_bandwidth();
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if (!red_stream_set_auto_flush(stream, false)) {
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/* FIXME: Using Nagle's Algorithm can lead to apparent delays, depending
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* on the delayed ack timeout on the other side.
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* Instead of using Nagle's, we need to implement message buffering on
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* the application level.
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* see: http://www.stuartcheshire.org/papers/NagleDelayedAck/
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*/
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red_stream_set_no_delay(stream, !is_low_bandwidth);
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}
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// TODO: move wide/narrow ack setting to red_channel.
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ack_set_client_window(is_low_bandwidth ? WIDE_CLIENT_ACK_WINDOW : NARROW_CLIENT_ACK_WINDOW);
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return true;
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}
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