commit 6197cb730e1571ca69859489c0ae7ea90a5c5fd4
author Neale Ranns <neale@graphiant.com> Thu Jun 03 14:43:21 2021 +0000
committer Ole Tr�an <otroan@employees.org> Mon Jun 14 13:12:34 2021 +0000
tree 769f178533896318ed98c0014987169d24db94db
parent 52c33d60bc63626d400067e38ab0af312fdb8594

pg: A Tunnel mode variant of a pg interface

Type: feature

this allows VPP to simulate linux tun devices.

Signed-off-by: Neale Ranns <neale@graphiant.com>
Change-Id: I3adf38b49a254804370f78edd5d275d192fd00a6

src/vnet/pg/stream.c

diff --git a/src/vnet/pg/stream.c b/src/vnet/pg/stream.c
index 0ce640b..686627b 100644
--- a/src/vnet/pg/stream.c
+++ b/src/vnet/pg/stream.c
@@ -229,9 +229,29 @@
     }
 }
 
+u8 *
+format_pg_tun_tx_trace (u8 *s, va_list *args)
+{
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+
+  s = format (s, "PG: tunnel (no-encap)");
+  return s;
+}
+
+VNET_HW_INTERFACE_CLASS (pg_tun_hw_interface_class) = {
+  .name = "PG-tun",
+  //.format_header = format_gre_header_with_length,
+  //.unformat_header = unformat_gre_header,
+  .build_rewrite = NULL,
+  //.update_adjacency = gre_update_adj,
+  .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
+};
+
 u32
-pg_interface_add_or_get (pg_main_t * pg, uword if_id, u8 gso_enabled,
-			 u32 gso_size, u8 coalesce_enabled)
+pg_interface_add_or_get (pg_main_t *pg, uword if_id, u8 gso_enabled,
+			 u32 gso_size, u8 coalesce_enabled,
+			 pg_interface_mode_t mode)
 {
   vnet_main_t *vnm = vnet_get_main ();
   vlib_main_t *vm = vlib_get_main ();
@@ -262,8 +282,20 @@
       hw_addr[1] = 0xfe;
 
       pi->id = if_id;
-      ethernet_register_interface (vnm, pg_dev_class.index, i, hw_addr,
-				   &pi->hw_if_index, pg_eth_flag_change);
+      pi->mode = mode;
+
+      switch (pi->mode)
+	{
+	case PG_MODE_ETHERNET:
+	  ethernet_register_interface (vnm, pg_dev_class.index, i, hw_addr,
+				       &pi->hw_if_index, pg_eth_flag_change);
+	  break;
+	case PG_MODE_IP4:
+	case PG_MODE_IP6:
+	  pi->hw_if_index = vnet_register_interface (
+	    vnm, pg_dev_class.index, i, pg_tun_hw_interface_class.index, i);
+	  break;
+	}
       hi = vnet_get_hw_interface (vnm, pi->hw_if_index);
       if (gso_enabled)
 	{
@@ -510,9 +542,9 @@
   }
 
   /* Find an interface to use. */
-  s->pg_if_index =
-    pg_interface_add_or_get (pg, s->if_id, 0 /* gso_enabled */ ,
-			     0 /* gso_size */ , 0 /* coalesce_enabled */ );
+  s->pg_if_index = pg_interface_add_or_get (
+    pg, s->if_id, 0 /* gso_enabled */, 0 /* gso_size */,
+    0 /* coalesce_enabled */, PG_MODE_ETHERNET);
 
   if (s->sw_if_index[VLIB_RX] == ~0)
     {