snat: thread safe (VPP-443)

All traffic corresponding to a specific SANT user is handled by a CPU core.
in2out: Non-translated packets worker lookup by src address and VRF hash in
snat-in2out-worker-handoff node.
out2in: Translated packets worker lookup by dst address and port number hash in
snat-out2in-worker-handoff node.

Change-Id: Ia092a605689539469841d382588f3f486a29a769
Signed-off-by: Matus Fabian <matfabia@cisco.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/vnet/etc/scripts/snat b/vnet/etc/scripts/snat
new file mode 100644
index 00000000000..87fd699ee51
--- /dev/null
+++ b/vnet/etc/scripts/snat
@@ -0,0 +1,34 @@
+packet-generator new {
+  name f1
+  limit 1000000
+  node ip4-input
+  size 64-64
+  no-recycle
+  worker 0
+  data {
+    UDP: 10.0.0.3 -> 172.16.1.2
+    UDP: 3000 -> 3001
+    length 128 checksum 0 incrementing 1
+  }
+}
+
+
+packet-generator new {
+  name f2
+  limit 1000000
+  node ip4-input
+  size 64-64
+  no-recycle
+  worker 1
+  data {
+    UDP: 10.0.0.3 -> 172.16.1.2
+    UDP: 3005 -> 3006
+    length 128 checksum 0 incrementing 1
+  }
+}
+
+snat add address 172.16.1.3
+ip route 172.16.1.2/32 via drop
+set int ip address pg0 10.0.0.1/24
+set int snat in pg0
+trace add pg-input 10