tests/py: Support testing JSON input and output as well

This extends nft-test.py by optional JSON testing capabilities,
activated via '-j'/'--enable-json' parameter).

JSON testing happens for all rules which are supposed to work: After a
rule has been added and the existing tests (payload, ruleset listing
output) have been performed, basically the same test is done again using
a recorded JSON equivalent and (if necessary) a recorded listing output.

The code tries to ease new test case creation overhead by
auto-generating JSON equivalent input via listing the (non-JSON) rule in
JSON format. Also, differing netlink debug and listing output are stored
in *.got files to assist in analyzing/fixing failing test cases.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 411 insertions, 0 deletions

diff --git a/tests/py/ip/masquerade.t.json b/tests/py/ip/masquerade.t.json
new file mode 100644
index 00000000..44f371ad
--- /dev/null
+++ b/tests/py/ip/masquerade.t.json
@@ -0,0 +1,411 @@
+# udp dport 53 masquerade
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "dport",
+                    "name": "udp"
+                }
+            },
+            "right": 53
+        }
+    },
+    {
+        "masquerade": null
+    }
+]
+
+# udp dport 53 masquerade random
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "dport",
+                    "name": "udp"
+                }
+            },
+            "right": 53
+        }
+    },
+    {
+        "masquerade": {
+            "flags": "random"
+        }
+    }
+]
+
+# udp dport 53 masquerade random,persistent
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "dport",
+                    "name": "udp"
+                }
+            },
+            "right": 53
+        }
+    },
+    {
+        "masquerade": {
+            "flags": [
+                "random",
+                "persistent"
+            ]
+        }
+    }
+]
+
+# udp dport 53 masquerade random,persistent,fully-random
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "dport",
+                    "name": "udp"
+                }
+            },
+            "right": 53
+        }
+    },
+    {
+        "masquerade": {
+            "flags": [
+                "random",
+                "persistent",
+                "fully-random"
+            ]
+        }
+    }
+]
+
+# udp dport 53 masquerade random,fully-random
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "dport",
+                    "name": "udp"
+                }
+            },
+            "right": 53
+        }
+    },
+    {
+        "masquerade": {
+            "flags": [
+                "random",
+                "fully-random"
+            ]
+        }
+    }
+]
+
+# udp dport 53 masquerade random,fully-random,persistent
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "dport",
+                    "name": "udp"
+                }
+            },
+            "right": 53
+        }
+    },
+    {
+        "masquerade": {
+            "flags": [
+                "random",
+                "fully-random",
+                "persistent"
+            ]
+        }
+    }
+]
+
+# udp dport 53 masquerade persistent
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "dport",
+                    "name": "udp"
+                }
+            },
+            "right": 53
+        }
+    },
+    {
+        "masquerade": {
+            "flags": "persistent"
+        }
+    }
+]
+
+# udp dport 53 masquerade persistent,random
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "dport",
+                    "name": "udp"
+                }
+            },
+            "right": 53
+        }
+    },
+    {
+        "masquerade": {
+            "flags": [
+                "persistent",
+                "random"
+            ]
+        }
+    }
+]
+
+# udp dport 53 masquerade persistent,random,fully-random
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "dport",
+                    "name": "udp"
+                }
+            },
+            "right": 53
+        }
+    },
+    {
+        "masquerade": {
+            "flags": [
+                "persistent",
+                "random",
+                "fully-random"
+            ]
+        }
+    }
+]
+
+# udp dport 53 masquerade persistent,fully-random
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "dport",
+                    "name": "udp"
+                }
+            },
+            "right": 53
+        }
+    },
+    {
+        "masquerade": {
+            "flags": [
+                "persistent",
+                "fully-random"
+            ]
+        }
+    }
+]
+
+# udp dport 53 masquerade persistent,fully-random,random
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "dport",
+                    "name": "udp"
+                }
+            },
+            "right": 53
+        }
+    },
+    {
+        "masquerade": {
+            "flags": [
+                "persistent",
+                "fully-random",
+                "random"
+            ]
+        }
+    }
+]
+
+# ip protocol 6 masquerade to :1024
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "protocol",
+                    "name": "ip"
+                }
+            },
+            "right": 6
+        }
+    },
+    {
+        "masquerade": {
+            "port": 1024
+        }
+    }
+]
+
+# ip protocol 6 masquerade to :1024-2048
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "protocol",
+                    "name": "ip"
+                }
+            },
+            "right": 6
+        }
+    },
+    {
+        "masquerade": {
+            "port": {
+                "range": [ 1024, 2048 ]
+            }
+        }
+    }
+]
+
+# tcp dport { 1,2,3,4,5,6,7,8,101,202,303,1001,2002,3003} masquerade
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "dport",
+                    "name": "tcp"
+                }
+            },
+            "right": {
+                "set": [
+                    1,
+                    2,
+                    3,
+                    4,
+                    5,
+                    6,
+                    7,
+                    8,
+                    101,
+                    202,
+                    303,
+                    1001,
+                    2002,
+                    3003
+                ]
+            }
+        }
+    },
+    {
+        "masquerade": null
+    }
+]
+
+# ip daddr 10.0.0.0-10.2.3.4 udp dport 53 counter masquerade
+[
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "daddr",
+                    "name": "ip"
+                }
+            },
+            "right": {
+                "range": [ "10.0.0.0", "10.2.3.4" ]
+            }
+        }
+    },
+    {
+        "match": {
+            "left": {
+                "payload": {
+                    "field": "dport",
+                    "name": "udp"
+                }
+            },
+            "right": 53
+        }
+    },
+    {
+        "counter": null
+    },
+    {
+        "masquerade": null
+    }
+]
+
+# iifname "eth0" ct state established,new tcp dport vmap {22 : drop, 222 : drop } masquerade
+[
+    {
+        "match": {
+            "left": {
+                "meta": "iifname"
+            },
+            "right": "eth0"
+        }
+    },
+    {
+        "match": {
+            "left": {
+                "ct": {
+                    "key": "state"
+                }
+            },
+            "right": [
+                "established",
+                "new"
+            ]
+        }
+    },
+    {
+        "map": {
+            "left": {
+                "payload": {
+                    "field": "dport",
+                    "name": "tcp"
+                }
+            },
+            "right": {
+                "set": [
+                    [
+                        22,
+                        {
+                            "drop": null
+                        }
+                    ],
+                    [
+                        222,
+                        {
+                            "drop": null
+                        }
+                    ]
+                ]
+            }
+        }
+    },
+    {
+        "masquerade": null
+    }
+]
+