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, 230 insertions, 0 deletions

diff --git a/tests/py/ip/hash.t.json b/tests/py/ip/hash.t.json
new file mode 100644
index 00000000..a463f94d
--- /dev/null
+++ b/tests/py/ip/hash.t.json
@@ -0,0 +1,230 @@
+# ct mark set jhash ip saddr . ip daddr mod 2 seed 0xdeadbeef
+[
+    {
+        "mangle": {
+            "left": {
+                "ct": {
+                    "key": "mark"
+                }
+            },
+            "right": {
+                "jhash": {
+                    "expr": {
+                        "concat": [
+                            {
+                                "payload": {
+                                    "field": "saddr",
+                                    "name": "ip"
+                                }
+                            },
+                            {
+                                "payload": {
+                                    "field": "daddr",
+                                    "name": "ip"
+                                }
+                            }
+                        ]
+                    },
+                    "mod": 2,
+                    "seed": 3735928559
+                }
+            }
+        }
+    }
+]
+
+# ct mark set jhash ip saddr . ip daddr mod 2
+[
+    {
+        "mangle": {
+            "left": {
+                "ct": {
+                    "key": "mark"
+                }
+            },
+            "right": {
+                "jhash": {
+                    "expr": {
+                        "concat": [
+                            {
+                                "payload": {
+                                    "field": "saddr",
+                                    "name": "ip"
+                                }
+                            },
+                            {
+                                "payload": {
+                                    "field": "daddr",
+                                    "name": "ip"
+                                }
+                            }
+                        ]
+                    },
+                    "mod": 2
+                }
+            }
+        }
+    }
+]
+
+# ct mark set jhash ip saddr . ip daddr mod 2 seed 0x0
+[
+    {
+        "mangle": {
+            "left": {
+                "ct": {
+                    "key": "mark"
+                }
+            },
+            "right": {
+                "jhash": {
+                    "expr": {
+                        "concat": [
+                            {
+                                "payload": {
+                                    "field": "saddr",
+                                    "name": "ip"
+                                }
+                            },
+                            {
+                                "payload": {
+                                    "field": "daddr",
+                                    "name": "ip"
+                                }
+                            }
+                        ]
+                    },
+                    "mod": 2,
+                    "seed": 0
+                }
+            }
+        }
+    }
+]
+
+# ct mark set jhash ip saddr . ip daddr mod 2 seed 0xdeadbeef offset 100
+[
+    {
+        "mangle": {
+            "left": {
+                "ct": {
+                    "key": "mark"
+                }
+            },
+            "right": {
+                "jhash": {
+                    "expr": {
+                        "concat": [
+                            {
+                                "payload": {
+                                    "field": "saddr",
+                                    "name": "ip"
+                                }
+                            },
+                            {
+                                "payload": {
+                                    "field": "daddr",
+                                    "name": "ip"
+                                }
+                            }
+                        ]
+                    },
+                    "mod": 2,
+                    "offset": 100,
+                    "seed": 3735928559
+                }
+            }
+        }
+    }
+]
+
+# ct mark set jhash ip saddr . ip daddr mod 2 offset 100
+[
+    {
+        "mangle": {
+            "left": {
+                "ct": {
+                    "key": "mark"
+                }
+            },
+            "right": {
+                "jhash": {
+                    "expr": {
+                        "concat": [
+                            {
+                                "payload": {
+                                    "field": "saddr",
+                                    "name": "ip"
+                                }
+                            },
+                            {
+                                "payload": {
+                                    "field": "daddr",
+                                    "name": "ip"
+                                }
+                            }
+                        ]
+                    },
+                    "mod": 2,
+                    "offset": 100
+                }
+            }
+        }
+    }
+]
+
+# dnat to jhash ip saddr mod 2 seed 0xdeadbeef map { 0 : 192.168.20.100, 1 : 192.168.30.100 }
+[
+    {
+        "dnat": {
+            "addr": {
+                "map": {
+                    "left": {
+                        "jhash": {
+                            "expr": {
+                                "payload": {
+                                    "field": "saddr",
+                                    "name": "ip"
+                                }
+                            },
+                            "mod": 2,
+                            "seed": 3735928559
+                        }
+                    },
+                    "right": {
+                        "set": [
+                            [
+                                0,
+                                "192.168.20.100"
+                            ],
+                            [
+                                1,
+                                "192.168.30.100"
+                            ]
+                        ]
+                    }
+                }
+            }
+        }
+    }
+]
+
+# ct mark set symhash mod 2 offset 100
+[
+    {
+        "mangle": {
+            "left": {
+                "ct": {
+                    "key": "mark"
+                }
+            },
+            "right": {
+                "symhash": {
+                    "mod": 2,
+                    "offset": 100
+                }
+            }
+        }
+    }
+]
+