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/*
* Copyright 2006 Serge van den Boom <svdb@stack.nl>
*
* This program 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 program 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 program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define NETCONNECTION_INTERNAL
#include "../netplay.h"
#include "npconfirm.h"
#include "types.h"
#include "../netmisc.h"
#include "../packetsenders.h"
#include <assert.h>
#include <errno.h>
int
Netplay_confirm(NetConnection *conn) {
assert(handshakeMeaningful(NetConnection_getState(conn)));
if (conn->stateFlags.handshake.localOk) {
// Already confirmed
errno = EINVAL;
return -1;
}
conn->stateFlags.handshake.localOk = true;
if (conn->stateFlags.handshake.canceling) {
// If a previous confirmation was cancelled, but the cancel
// is not acknowledged yet, we don't have to send anything yet.
// The handshake0 packet will be sent when the acknowledgement
// arrives.
} else if (conn->stateFlags.handshake.remoteOk) {
// A Handshake0 is implied by the following Handshake1.
sendHandshake1(conn);
} else {
sendHandshake0(conn);
}
return 0;
}
int
Netplay_cancelConfirmation(NetConnection *conn) {
assert(handshakeMeaningful(NetConnection_getState(conn)));
if (!conn->stateFlags.handshake.localOk) {
// Not confirmed, or already canceling.
errno = EINVAL;
return -1;
}
conn->stateFlags.handshake.localOk = false;
if (conn->stateFlags.handshake.canceling) {
// If previous cancellation is still waiting to be acknowledged,
// the confirmation we are cancelling here, has not actually been
// sent yet. By setting the localOk flag to false, it is
// cancelled, without the need for any packets to be sent.
} else {
conn->stateFlags.handshake.canceling = true;
sendHandshakeCancel(conn);
}
return 0;
}
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