src: Support netdev egress hook

Add userspace support for the netdev egress hook which is queued up for
v5.16-rc1, complete with documentation and tests.  Usage is identical to
the ingress hook.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 93 insertions, 0 deletions

diff --git a/tests/py/ip/ip_tcp.t.payload.netdev b/tests/py/ip/ip_tcp.t.payload.netdev
new file mode 100644
index 00000000..74dc1195
--- /dev/null
+++ b/tests/py/ip/ip_tcp.t.payload.netdev
@@ -0,0 +1,93 @@
+# ip protocol tcp tcp dport 22
+netdev test-netdev ingress 
+  [ meta load protocol => reg 1 ]
+  [ cmp eq reg 1 0x00000008 ]
+  [ payload load 1b @ network header + 9 => reg 1 ]
+  [ cmp eq reg 1 0x00000006 ]
+  [ payload load 2b @ transport header + 2 => reg 1 ]
+  [ cmp eq reg 1 0x00001600 ]
+
+# ip protocol tcp meta mark set 1 tcp dport 22
+netdev test-netdev ingress 
+  [ meta load protocol => reg 1 ]
+  [ cmp eq reg 1 0x00000008 ]
+  [ payload load 1b @ network header + 9 => reg 1 ]
+  [ cmp eq reg 1 0x00000006 ]
+  [ immediate reg 1 0x00000001 ]
+  [ meta set mark with reg 1 ]
+  [ payload load 2b @ transport header + 2 => reg 1 ]
+  [ cmp eq reg 1 0x00001600 ]
+
+# ip protocol tcp meta mark set 1 tcp dport 22
+netdev test-netdev egress 
+  [ meta load protocol => reg 1 ]
+  [ cmp eq reg 1 0x00000008 ]
+  [ payload load 1b @ network header + 9 => reg 1 ]
+  [ cmp eq reg 1 0x00000006 ]
+  [ immediate reg 1 0x00000001 ]
+  [ meta set mark with reg 1 ]
+  [ payload load 2b @ transport header + 2 => reg 1 ]
+  [ cmp eq reg 1 0x00001600 ]
+
+# ip protocol tcp tcp dport 22
+netdev test-netdev ingress 
+  [ meta load protocol => reg 1 ]
+  [ cmp eq reg 1 0x00000008 ]
+  [ payload load 1b @ network header + 9 => reg 1 ]
+  [ cmp eq reg 1 0x00000006 ]
+  [ payload load 2b @ transport header + 2 => reg 1 ]
+  [ cmp eq reg 1 0x00001600 ]
+
+# ip protocol tcp meta mark set 1 tcp dport 22
+netdev test-netdev ingress 
+  [ meta load protocol => reg 1 ]
+  [ cmp eq reg 1 0x00000008 ]
+  [ payload load 1b @ network header + 9 => reg 1 ]
+  [ cmp eq reg 1 0x00000006 ]
+  [ immediate reg 1 0x00000001 ]
+  [ meta set mark with reg 1 ]
+  [ payload load 2b @ transport header + 2 => reg 1 ]
+  [ cmp eq reg 1 0x00001600 ]
+
+# ip protocol tcp meta mark set 1 tcp dport 22
+netdev test-netdev egress 
+  [ meta load protocol => reg 1 ]
+  [ cmp eq reg 1 0x00000008 ]
+  [ payload load 1b @ network header + 9 => reg 1 ]
+  [ cmp eq reg 1 0x00000006 ]
+  [ immediate reg 1 0x00000001 ]
+  [ meta set mark with reg 1 ]
+  [ payload load 2b @ transport header + 2 => reg 1 ]
+  [ cmp eq reg 1 0x00001600 ]
+
+# ip protocol tcp tcp dport 22
+netdev test-netdev ingress 
+  [ meta load protocol => reg 1 ]
+  [ cmp eq reg 1 0x00000008 ]
+  [ payload load 1b @ network header + 9 => reg 1 ]
+  [ cmp eq reg 1 0x00000006 ]
+  [ payload load 2b @ transport header + 2 => reg 1 ]
+  [ cmp eq reg 1 0x00001600 ]
+
+# ip protocol tcp meta mark set 1 tcp dport 22
+netdev test-netdev ingress 
+  [ meta load protocol => reg 1 ]
+  [ cmp eq reg 1 0x00000008 ]
+  [ payload load 1b @ network header + 9 => reg 1 ]
+  [ cmp eq reg 1 0x00000006 ]
+  [ immediate reg 1 0x00000001 ]
+  [ meta set mark with reg 1 ]
+  [ payload load 2b @ transport header + 2 => reg 1 ]
+  [ cmp eq reg 1 0x00001600 ]
+
+# ip protocol tcp meta mark set 1 tcp dport 22
+netdev test-netdev egress 
+  [ meta load protocol => reg 1 ]
+  [ cmp eq reg 1 0x00000008 ]
+  [ payload load 1b @ network header + 9 => reg 1 ]
+  [ cmp eq reg 1 0x00000006 ]
+  [ immediate reg 1 0x00000001 ]
+  [ meta set mark with reg 1 ]
+  [ payload load 2b @ transport header + 2 => reg 1 ]
+  [ cmp eq reg 1 0x00001600 ]
+