src: add synproxy stateful object support

Add support for "synproxy" stateful object. For example (for TCP port 80 and
using maps with saddr):

table ip foo {
	synproxy https-synproxy {
		mss 1460
		wscale 7
		timestamp sack-perm
	}

	synproxy other-synproxy {
		mss 1460
		wscale 5
	}

	chain bar {
		tcp dport 80 synproxy name "https-synproxy"
		synproxy name ip saddr map { 192.168.1.0/24 : "https-synproxy", 192.168.2.0/24 : "other-synproxy" }
	}
}

Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 27 insertions, 0 deletions

diff --git a/tests/py/ip/objects.t.json b/tests/py/ip/objects.t.json
index 596ad188..634f1921 100644
--- a/tests/py/ip/objects.t.json
+++ b/tests/py/ip/objects.t.json
@@ -200,3 +200,30 @@
     }
 ]
 
+# synproxy name tcp dport map {443 : "synproxy1", 80 : "synproxy2"}
+[
+    {
+        "synproxy": {
+            "map": {
+                "key": {
+                    "payload": {
+                        "field": "dport",
+                        "protocol": "tcp"
+                    }
+                },
+                "data": {
+                    "set": [
+                        [
+                            80,
+                            "synproxy2"
+                        ],
+                        [
+                            443,
+                            "synproxy1"
+                        ]
+                    ]
+                }
+            }
+        }
+    }
+]