1 files changed, 81 insertions, 0 deletions
diff --git a/src/uqm/supermelee/netplay/proto/npconfirm.c b/src/uqm/supermelee/netplay/proto/npconfirm.c
new file mode 100644
index 0000000..6929219
--- /dev/null
+++ b/src/uqm/supermelee/netplay/proto/npconfirm.c
@@ -0,0 +1,81 @@
+/*
+ *  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;
+}
+
+