simulator: Add support for networking (v1)

This change adds support for networking in the simulator. 
As outlined in #84, the network model doesn't model individual packets, 
but instead considers dynamic flows between network devices. 
This pull request adds the bare-minimum implementation necessary to model network traffic. 
In the future, we will add advanced functionality such as routing and other L3 concepts. 

* Add core model for network simulation
* Add model for network adapter that attaches to machine
* Add virtual network switch to bridge traffic between hosts.

2 files changed, 4 insertions, 4 deletions

diff --git a/opendc-experiments/opendc-experiments-tf20/src/main/kotlin/org/opendc/experiments/tf20/core/SimTFDevice.kt b/opendc-experiments/opendc-experiments-tf20/src/main/kotlin/org/opendc/experiments/tf20/core/SimTFDevice.kt
index 92e7080a..d8f92155 100644
--- a/opendc-experiments/opendc-experiments-tf20/src/main/kotlin/org/opendc/experiments/tf20/core/SimTFDevice.kt
+++ b/opendc-experiments/opendc-experiments-tf20/src/main/kotlin/org/opendc/experiments/tf20/core/SimTFDevice.kt
@@ -28,7 +28,7 @@ import kotlinx.coroutines.*
 import org.opendc.simulator.compute.SimBareMetalMachine
 import org.opendc.simulator.compute.SimMachine
 import org.opendc.simulator.compute.SimMachineContext
-import org.opendc.simulator.compute.SimMachineModel
+import org.opendc.simulator.compute.model.MachineModel
 import org.opendc.simulator.compute.model.MemoryUnit
 import org.opendc.simulator.compute.model.ProcessingUnit
 import org.opendc.simulator.compute.power.PowerModel
@@ -63,7 +63,7 @@ public class SimTFDevice(
      * The [SimMachine] representing the device.
      */
     private val machine = SimBareMetalMachine(
-        SimResourceInterpreter(scope.coroutineContext, clock), SimMachineModel(listOf(pu), listOf(memory)),
+        SimResourceInterpreter(scope.coroutineContext, clock), MachineModel(listOf(pu), listOf(memory)),
         SimplePowerDriver(powerModel)
     )
 
diff --git a/opendc-experiments/opendc-experiments-tf20/src/main/kotlin/org/opendc/experiments/tf20/util/MLEnvironmentReader.kt b/opendc-experiments/opendc-experiments-tf20/src/main/kotlin/org/opendc/experiments/tf20/util/MLEnvironmentReader.kt
index eea079fb..3e61f508 100644
--- a/opendc-experiments/opendc-experiments-tf20/src/main/kotlin/org/opendc/experiments/tf20/util/MLEnvironmentReader.kt
+++ b/opendc-experiments/opendc-experiments-tf20/src/main/kotlin/org/opendc/experiments/tf20/util/MLEnvironmentReader.kt
@@ -27,7 +27,7 @@ import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import com.fasterxml.jackson.module.kotlin.readValue
 import org.opendc.format.environment.EnvironmentReader
 import org.opendc.format.environment.MachineDef
-import org.opendc.simulator.compute.SimMachineModel
+import org.opendc.simulator.compute.model.MachineModel
 import org.opendc.simulator.compute.model.MemoryUnit
 import org.opendc.simulator.compute.model.ProcessingNode
 import org.opendc.simulator.compute.model.ProcessingUnit
@@ -100,7 +100,7 @@ public class MLEnvironmentReader(input: InputStream, mapper: ObjectMapper = jack
                                 UUID(0, counter.toLong()),
                                 "node-${counter++}",
                                 mapOf("gpu" to isGpuFlag),
-                                SimMachineModel(cores, memories),
+                                MachineModel(cores, memories),
                                 LinearPowerModel(maxPower, minPower)
                             )
                         }