tests: add basic payload tests

payload set operations should work at least for byte-sized
quantities >= 2 byte.

Before adding support for odd-sized writes (ecn, dscp, ip6 flowlabel
...) add a bunch of tests to cover current state.

Signed-off-by: Florian Westphal <fw@strlen.de>

4 files changed, 74 insertions, 0 deletions

diff --git a/tests/py/ip/ip.t b/tests/py/ip/ip.t
index a265b757..90e117ae 100644
--- a/tests/py/ip/ip.t
+++ b/tests/py/ip/ip.t
@@ -121,3 +121,8 @@ ip version 4 ip hdrlength 5;ok
 ip hdrlength 0;ok
 ip hdrlength 15;ok
 ip hdrlength 16;fail
+
+# limit impact to lo
+iif lo ip daddr set 127.0.0.1;ok
+iif lo ip checksum set 0;ok
+iif lo ip id set 0;ok
diff --git a/tests/py/ip/ip.t.payload b/tests/py/ip/ip.t.payload
index 15cc5904..d6ef540b 100644
--- a/tests/py/ip/ip.t.payload
+++ b/tests/py/ip/ip.t.payload
@@ -416,3 +416,24 @@ ip test-ip4 input
   [ bitwise reg 1 = (reg=1 & 0x0000000f ) ^ 0x00000000 ]
   [ cmp eq reg 1 0x0000000f ]
 
+# iif lo ip daddr set 127.0.0.1
+ip test-ip4 input
+  [ meta load iif => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+  [ immediate reg 1 0x0100007f ]
+  [ payload write reg 1 => 4b @ network header + 16 csum_type 1 csum_off 10 ]
+
+# iif lo ip checksum set 0
+ip test-ip4 input
+  [ meta load iif => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+  [ immediate reg 1 0x00000000 ]
+  [ payload write reg 1 => 2b @ network header + 10 csum_type 1 csum_off 10 ]
+
+# iif lo ip id set 0
+ip test-ip4 input
+  [ meta load iif => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+  [ immediate reg 1 0x00000000 ]
+  [ payload write reg 1 => 2b @ network header + 4 csum_type 1 csum_off 10 ]
+
diff --git a/tests/py/ip/ip.t.payload.inet b/tests/py/ip/ip.t.payload.inet
index e495246e..6c78536c 100644
--- a/tests/py/ip/ip.t.payload.inet
+++ b/tests/py/ip/ip.t.payload.inet
@@ -548,3 +548,28 @@ inet test-inet input
   [ bitwise reg 1 = (reg=1 & 0x0000000f ) ^ 0x00000000 ]
   [ cmp eq reg 1 0x0000000f ]
 
+# iif lo ip daddr set 127.0.0.1
+inet test-inet input
+  [ meta load iif => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+  [ meta load nfproto => reg 1 ]
+  [ cmp eq reg 1 0x00000002 ]
+  [ immediate reg 1 0x0100007f ]
+  [ payload write reg 1 => 4b @ network header + 16 csum_type 1 csum_off 10 ]
+
+# iif lo ip checksum set 0
+inet test-inet input
+  [ meta load iif => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+  [ meta load nfproto => reg 1 ]
+  [ cmp eq reg 1 0x00000002 ]
+  [ immediate reg 1 0x00000000 ]
+  [ payload write reg 1 => 2b @ network header + 10 csum_type 1 csum_off 10 ]
+
+# iif lo ip id set 0
+inet test-inet input
+  [ meta load iif => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+  [ meta load nfproto => reg 1 ]
+  [ cmp eq reg 1 0x00000002 ]
+  [ immediate reg 1 0x00000000 ]
diff --git a/tests/py/ip/ip.t.payload.netdev b/tests/py/ip/ip.t.payload.netdev
index 8eaee4cf..714b0d24 100644
--- a/tests/py/ip/ip.t.payload.netdev
+++ b/tests/py/ip/ip.t.payload.netdev
@@ -648,3 +648,26 @@ netdev test-netdev ingress
   [ bitwise reg 1 = (reg=1 & 0x000000fc ) ^ 0x00000000 ]
   [ lookup reg 1 set __set%d ]
 
+# iif lo ip daddr set 127.0.0.1
+netdev test-netdev ingress
+  [ meta load iif => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+  [ meta load protocol => reg 1 ]
+  [ cmp eq reg 1 0x00000008 ]
+  [ immediate reg 1 0x0100007f ]
+  [ payload write reg 1 => 4b @ network header + 16 csum_type 1 csum_off 10 ]
+
+# iif lo ip checksum set 0
+netdev test-netdev ingress
+  [ meta load iif => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+  [ meta load protocol => reg 1 ]
+  [ cmp eq reg 1 0x00000008 ]
+  [ immediate reg 1 0x00000000 ]
+  [ payload write reg 1 => 2b @ network header + 10 csum_type 1 csum_off 10 ]
+
+# iif lo ip id set 0
+netdev test-netdev ingress
+  [ meta load iif => reg 1 ]
+  [ cmp eq reg 1 0x00000001 ]
+  [ meta load protocol => reg 1 ]