Openflow parser

test/ofp_flow_removed_test.exs

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+defmodule OfpFlowRemovedTest do
+  use ExUnit.Case
+  doctest Openflow
+
+  describe "Openflow.read/1" do
+    test "with OFP_FLOW_REMOVED packet(with a match field)" do
+      {:ok, flow_removed, ""} =
+        "test/packet_data/4-40-ofp_flow_removed.packet"
+        |> File.read!
+        |> Openflow.read
+
+      assert flow_removed.version == 4
+      assert flow_removed.xid == 0
+      assert flow_removed.cookie == 0
+      assert flow_removed.priority == 0xffff
+      assert flow_removed.reason == :idle_timeout
+      assert flow_removed.table_id == 0
+      assert flow_removed.duration_sec == 3
+      assert flow_removed.duration_nsec == 48_825_000
+      assert flow_removed.idle_timeout == 3
+      assert flow_removed.hard_timeout == 0
+      assert flow_removed.packet_count == 1
+      assert flow_removed.byte_count == 86
+      assert flow_removed.match == [eth_dst: "f20ba47df8ea"]
+    end
+
+    test "with OFP_FLOW_REMOVED packet(with match fields)" do
+      {:ok, flow_removed, ""} =
+        "test/packet_data/libofproto-OFP13-flow_removed.packet"
+        |> File.read!
+        |> Openflow.read
+
+      assert flow_removed.version == 4
+      assert flow_removed.xid == 0
+      assert flow_removed.cookie == 0x123456789abcdef0
+      assert flow_removed.priority == 100
+      assert flow_removed.reason == :idle_timeout
+      assert flow_removed.table_id == 1
+      assert flow_removed.duration_sec == 600
+      assert flow_removed.duration_nsec == 500
+      assert flow_removed.idle_timeout == 400
+      assert flow_removed.hard_timeout == 300
+      assert flow_removed.packet_count == 200
+      assert flow_removed.byte_count == 100
+      assert flow_removed.match == [
+        in_port: 43_981,
+        eth_dst: "aabbcc998877",
+        eth_type: 2048,
+        vlan_vid: 5095,
+        ipv4_dst: {192, 168, 2, 1},
+        tunnel_id: 50_000,
+        tun_src: {192, 168, 2, 3},
+        tun_dst: {192, 168, 2, 4}
+      ]
+    end
+  end
+end