test/case: add basic routing test

test/case/ietf_interfaces/all.yaml

@@ -2,3 +2,4 @@
 - case: vlan_ping.py
 - case: ipv4_address.py
 - case: iface_status.py
+- case: routing_basic.py

test/case/ietf_interfaces/routing_basic.py

@@ -0,0 +1,98 @@
+#!/usr/bin/env python3
+# ,------------------------------------------------,       
+# |                 [TARGET]                       | 
+# |                            br0                 |  
+# |                           /   \                | 
+# | target:mgmt   target:data0     targetgt:data1  | 
+# |              [192.168.0.1]     [10.0.0.1]      |
+# '------------------------------------------------'
+#         |                  |     |            
+#         |                  |     |           
+# ,----------------------------------------------,
+# |   host:mgmt    host:data0       host:data1   |
+# |             [192.168.0.10]     [10.0.0.10]   |
+# |                  (ns0)            (ns1)      |
+# |                                              |
+# |                  [ HOST ]                    |
+# '----------------------------------------------'
+
+import infamy
+
+def config_target(target, tport0, tport1, enable_fwd):
+    target.put_config_dict("ietf-interfaces", {
+            "interfaces": {
+                "interface": [
+                    {
+                        "name": tport0,
+                        "type": "iana-if-type:ethernetCsmacd",
+                        "enabled": True,
+                        "ipv4": {
+                            "forwarding": enable_fwd,
+                            "address": [{
+                            "ip": "192.168.0.1",
+                            "prefix-length": 24
+                            }]
+                        }
+                    },
+                    {
+                        "name": tport1,
+                        "type": "iana-if-type:ethernetCsmacd",
+                        "enabled": True,
+                        "ipv4": {
+                            "forwarding": enable_fwd,
+                            "address": [{
+                            "ip": "10.0.0.1",
+                            "prefix-length": 24
+                            }]
+                        }
+                    }
+                ]
+            }
+        })
+
+with infamy.Test() as test:
+    with test.step("Initialize"):
+        env = infamy.Env(infamy.std_topology("1x3"))
+        target = env.attach("target", "mgmt")
+
+    with test.step("Configure target physical ports [enable routing]"):
+        _, tport0 = env.ltop.xlate("target", "data0")
+        _, tport1 = env.ltop.xlate("target", "data1")
+
+        config_target(target, tport0, tport1, True)
+
+    with test.step("Test: Ip routing enabled"):
+        _, hport0 = env.ltop.xlate("host", "data0")
+        _, hport1 = env.ltop.xlate("host", "data1")
+
+        with infamy.IsolatedMacVlan(hport0) as ns0, \
+             infamy.IsolatedMacVlan(hport1) as ns1 :
+            
+            ns0.addip("192.168.0.10")
+            ns0.addroute("default", "192.168.0.1")
+                
+            ns1.addip("10.0.0.10")
+            ns1.addroute("default", "10.0.0.1")
+            
+            ns0.must_reach("10.0.0.10")
+            ns1.must_reach("192.168.0.10")
+
+    with test.step("Configure target physical ports [disable routing]"):
+
+        config_target(target, tport0, tport1, False)
+
+    with test.step("Test: Ip routing disabled"):
+
+        with infamy.IsolatedMacVlan(hport0) as ns0, \
+             infamy.IsolatedMacVlan(hport1) as ns1 :
+            
+            ns0.addip("192.168.0.10")
+            ns0.addroute("default", "192.168.0.1")
+                
+            ns1.addip("10.0.0.10")
+            ns1.addroute("default", "10.0.0.1")
+
+            ns0.must_not_reach("10.0.0.10")
+            ns1.must_not_reach("192.168.0.10")
+
+    test.succeed()

test/infamy/netns.py

@@ -67,11 +67,20 @@ class IsolatedMacVlan:
         return self.run("/bin/sh", text=True, input=script,
                         stdout=subprocess.PIPE, stderr=subprocess.STDOUT, *args, **kwargs)
     
-    def addip(self, addr, subnet=24):
+    def addroute(self, subnet, nexthop, prefix_length=""):
+        if prefix_length:
+            prefix_length=f"/{prefix_length}"
+        
+        self.runsh(f"""
+            set -ex
+            ip route add {subnet}{prefix_length} via {nexthop}
+            """, check=True)
+
+    def addip(self, addr, prefix_length=24):
         self.runsh(f"""
             set -ex 
             ip link set iface up
-            ip addr add {addr}/{subnet} dev iface
+            ip addr add {addr}/{prefix_length} dev iface
             """, check=True)
     
     def ping(self, daddr, count=1, timeout=2, check=False):
@@ -86,3 +95,4 @@ class IsolatedMacVlan:
         res = self.ping(daddr)
         if res.returncode == 0:
             raise Exception(res.stdout)
+