Add TAP syntax/semantic validator

unittest/test_tap.yaml

@@ -0,0 +1,22 @@
+taps:
+  tap0:
+    description: "TAP with MAC, MTU and Bridge"
+    mac: 00:01:02:03:04:05
+    host:
+      mtu: 9216
+      name: vpp-tap0
+      bridge: br0
+    rx-ring-size: 256
+    tx-ring-size: 256
+  tap1:
+    description: "TAP, no config other than mandatory host-name"
+    host:
+      name: vpp-tap1
+  tap2:
+    description: "TAP, which has an overlapping host-name"
+    host:
+      name: vpp-tap
+  tap3:
+    description: "TAP, which has an overlapping host-name"
+    host:
+      name: vpp-tap

unittest/yaml/correct-tap.yaml

@@ -0,0 +1,19 @@
+test:
+  description: "A few correct examples of well formed TAP interfaces"
+  errors:
+    count: 0
+---
+taps:
+  tap0:
+    description: "TAP with MAC, MTU and Bridge"
+    host:
+      name: vpp-tap0
+      mac: 00:01:02:03:04:05
+      mtu: 9216
+      bridge: br0
+    rx-ring-size: 256
+    tx-ring-size: 256
+  tap1:
+    description: "TAP, no config other than mandatory host-name"
+    host:
+      name: vpp-tap1

unittest/yaml/error-tap1.yaml

@@ -0,0 +1,19 @@
+test:
+  description: "Instance id must be between [0..1024]"
+  errors:
+    expected:
+      - "tap .* has instance .* which is too large"
+    count: 1
+---
+taps:
+  tap0:
+    host:
+      name: vpp-tap0
+  tap1024:
+    description: "Cool"
+    host:
+      name: vpp-tap1024
+  tap1025:
+    description: "Not cool"
+    host:
+      name: vpp-tap1025

unittest/yaml/error-tap2.yaml

@@ -0,0 +1,14 @@
+test:
+  description: "RX and TX ring sizes must be power of two, at most 32K"
+  errors:
+    expected:
+      - "tap .* rx-ring-size must be a power of two"
+      - "tap .* tx-ring-size must be a power of two"
+    count: 2
+---
+taps:
+  tap0:
+    host:
+      name: vpp-tap0
+    rx-ring-size: 1023
+    tx-ring-size: 32767

unittest/yaml/error-tap3.yaml

@@ -0,0 +1,15 @@
+test:
+  description: "TAP host names must be unique"
+  errors:
+    expected:
+     - "tap .* does not have a unique host name .*"
+    count: 2
+---
+taps:
+  tap0:
+    host:
+      name: vpp-tap
+
+  tap1:
+    host:
+      name: vpp-tap

unittest/yaml/error-tap4.yaml

@@ -0,0 +1,23 @@
+test:
+  description: "TAP host mac addresses cannot be multicast"
+  errors:
+    expected:
+     - "tap .* host MAC address .* cannot be multicast"
+    count: 1
+---
+taps:
+  tap0:
+    description: "Cool, local MACs are fine"
+    host:
+      mac: 02:00:00:00:00:00
+      name: vpp-tap0
+  tap1:
+    description: "Cool, global unicast MACs are fine"
+    host:
+      mac: 04:00:00:00:00:00
+      name: vpp-tap1
+  tap2:
+    description: "Not cool, multicast MACs"
+    host:
+      mac: 01:00:00:00:00:00
+      name: vpp-tap2

unittest/yaml/error-tap5.yaml

@@ -0,0 +1,34 @@
+test:
+  description: "Creating bridge or namespace can only be asked if their name is specified"
+  errors:
+    expected:
+     - "tap .* bridge-create can only be set if bridge is set"
+     - "tap .* namespace-create can only be set if namespace is set"
+    count: 2
+---
+taps:
+  tap0:
+    description: "Cool, create bridge and namespace"
+    host:
+      mac: 02:00:00:00:00:00
+      name: vpp-tap0
+      bridge: vpp-br0
+      bridge-create: True
+      namespace: vpp-test
+      namespace-create: True
+  tap1:
+    description: "Cool, assuming the operator has created the bridge and namespace beforehand"
+    host:
+      name: vpp-tap1
+      bridge: vpp-br1
+      namespace: vpp-test
+  tap2:
+    description: "Not cool, asking to create a bridge without giving its name"
+    host:
+      name: vpp-tap2
+      bridge-create: True
+  tap3:
+    description: "Not cool, asking to create a namespace without giving its name"
+    host:
+      name: vpp-tap3
+      namespace-create: True