Publish debugging tool, fix bugs in protojs

examples/proxy.js

@@ -0,0 +1,84 @@
+var mc = require('../');
+
+var states = mc.protocol.states;
+function print_help() {
+    console.log("usage: node proxy.js <target_srv> <user> [<password>]");
+}
+
+if (process.argv.length < 4) {
+    console.log("Too few arguments!");
+    print_help();
+    process.exit(1);
+}
+
+process.argv.forEach(function(val, index, array) {
+    if (val == "-h") {
+        print_help();
+        process.exit(0);
+    }
+});
+
+var host = process.argv[2];
+var port = 25565;
+var user = process.argv[3];
+var passwd = process.argv[4];
+
+if (host.indexOf(':') != -1) {
+    port = host.substring(host.indexOf(':')+1);
+    host = host.substring(0, host.indexOf(':'));
+}
+
+var srv = mc.createServer({
+  'online-mode': false,
+  port: 25566
+});
+srv.on('login', function (client) {
+  var addr = client.socket.remoteAddress;
+  console.log('Incoming connection', '('+addr+')');
+  var endedClient = false;
+  var endedTargetClient = false;
+  client.on('end', function() {
+    endedClient = true;
+    console.log('Connection closed by client', '('+addr+')');
+    if (!endedTargetClient)
+      targetClient.end("End");
+  });
+  client.on('error', function() {
+    endedClient = true;
+    console.log('Connection error by client', '('+addr+')');
+    if (!endedTargetClient)
+    targetClient.end("Error");
+  });
+  var targetClient = mc.createClient({
+    host: host,
+    port: port,
+    username: user,
+    password: passwd
+  });
+  client.on('packet', function(packet) {
+    if (targetClient.state == states.PLAY && packet.state == states.PLAY) {
+      console.log(`client->server: ${client.state}.${packet.id} : ${JSON.stringify(packet)}`);
+      if (!endedTargetClient)
+        targetClient.write(packet.id, packet);
+    }
+  });
+  targetClient.on('packet', function(packet) {
+    if (packet.state == states.PLAY && client.state == states.PLAY) {
+      console.log(`client<-server: ${targetClient.state}.${packet.id} : ${JSON.stringify(packet)}`);
+      if (!endedClient)
+        client.write(packet.id, packet);
+    }
+  });
+  targetClient.on('end', function() {
+    endedTargetClient = true;
+    console.log('Connection closed by server', '('+addr+')');
+    if (!endedClient)
+      client.end("End");
+  });
+  targetClient.on('error', function() {
+    endedTargetClient = true;
+    console.log('Connection error by server', '('+addr+')');
+    if (!endedClient)
+      client.end("Error");
+  });
+});

lib/protocol.js

@@ -491,7 +491,7 @@ var packets = {
                 { name: "value", type: "ustring" },
                 { name: "isSigned", type: "bool" },
                 { name: "signature", type: "ustring", condition: function(field_values) {
-                    return field_values["isSigned"];
+                    return field_values["this"]["isSigned"];
             }}
         ]}}},
         { name: "gamemode", type: "varint", condition: function(field_values) {
@@ -668,7 +668,6 @@ var packets = {
       ]},
       position:    {id: 0x04, fields: [
         { name: "x", type: "double" },
-        { name: "stance", type: "double" },
         { name: "y", type: "double" },
         { name: "z", type: "double" },
         { name: "onGround", type: "bool" }