desc = "Trxeb1120";
} else if (filename.endsWith(".eth1120")) {
exp5438Node = new Trxeb1120Node(true);
desc = "Eth1120";
} else if (filename.endsWith(".exp2420") || filename.endsWith(".exp5438")) {
exp5438Node = new Exp5438Node();
desc = "Exp5438+CC2420";
} else {
throw new IllegalStateException("unknown file extension, cannot figure out what Mspsim node type to use: " + filename);
}