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Implemented basic client disconnection support

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Added basic support for automatically detecting inactive channels and performing a client disconnect on them
This commit is contained in:
Collin Smith
2020-06-27 16:57:51 -07:00
parent 70cf9d016a
commit b2bf16bb1e
1 changed files with 45 additions and 1 deletions
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46
server/netty/src/com/riiablo/server/d2gs/Main.java
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@ -75,6 +75,13 @@ public class Main extends ApplicationAdapter implements PacketProcessor {
Main.this.endpoint = endpoint;
ch.pipeline()
.addFirst(connectionLimiter)
.addLast(new ChannelInboundHandlerAdapter() {
@Override
public void channelInactive(ChannelHandlerContext ctx) throws Exception {
super.channelInactive(ctx);
notifyChannelInactive(ctx);
}
})
.addLast(new SizePrefixedDecoder())
.addLast(new EndpointedChannelHandler<>(ByteBuf.class, endpoint))
;
@ -122,8 +129,12 @@ public class Main extends ApplicationAdapter implements PacketProcessor {
case NettyData.Connection:
Connection(ctx, from, netty);
break;
case NettyData.Disconnect:
Disconnect(ctx, from, netty);
break;
default:
Gdx.app.debug(TAG, "unknown data type: " + netty.dataType());
Gdx.app.debug(TAG, " " + "closing " + ctx);
ctx.close();
}
}
@ -150,6 +161,7 @@ public class Main extends ApplicationAdapter implements PacketProcessor {
assert id != MAX_CLIENTS : "no available client slots. connection limiter should have caught this";
if (id == MAX_CLIENTS) {
Gdx.app.error(TAG, " " + "client connected, but no slot is available");
Gdx.app.debug(TAG, " " + "closing " + ctx);
ctx.close();
return;
}
@ -188,6 +200,36 @@ public class Main extends ApplicationAdapter implements PacketProcessor {
}
}
private void Disconnect(ChannelHandlerContext ctx, SocketAddress from, Netty netty) {
Gdx.app.debug(TAG, "Disconnect from " + from);
// Disconnect disconnect = (Disconnect) netty.data(new Disconnect());
disconnect(ctx, from);
}
private void disconnect(ChannelHandlerContext ctx, SocketAddress from) {
Gdx.app.debug(TAG, " " + "disconnecting " + from);
synchronized (clients) {
int id;
for (id = 0; id < MAX_CLIENTS && !from.equals(clients[id].address); id++) ;
Gdx.app.debug(TAG, " " + "found connection record for " + from + " as " + id);
if (id == MAX_CLIENTS) {
Gdx.app.error(TAG, " " + "channel reported inactive, but there isn't any client connecting from it: " + from);
} else {
Gdx.app.debug(TAG, " " + "disconnecting " + id);
clients[id].disconnect();
}
Gdx.app.debug(TAG, " " + "closing " + ctx);
ctx.close();
}
}
private void notifyChannelInactive(ChannelHandlerContext ctx) {
Gdx.app.debug(TAG, "notifyChannelInactive");
SocketAddress from = endpoint.getRemoteAddress(ctx, null);
disconnect(ctx, from);
}
@ChannelHandler.Sharable
static class ConnectionLimiter extends ChannelInboundHandlerAdapter {
static final String TAG = "ConnectionLimiter";
@ -206,8 +248,9 @@ public class Main extends ApplicationAdapter implements PacketProcessor {
Gdx.app.debug(TAG, String.format("connection accepted. %d / %d", count, maxClients));
super.channelActive(ctx);
} else {
Gdx.app.debug(TAG, " " + "closing " + ctx);
ctx.close();
Gdx.app.debug(TAG, String.format("closing connection. maximum concurrent connections reached %d / %d", count, maxClients));
Gdx.app.debug(TAG, String.format("connection closed. maximum concurrent connections reached %d / %d", count, maxClients));
}
}
@ -238,6 +281,7 @@ public class Main extends ApplicationAdapter implements PacketProcessor {
ClientData disconnect() {
assert connected;
connected = false;
address = null;
return this;
}
}