tunnel: support copying TTL and flow label from inner to outer

Type: feature

The added functionality is to support copying TTL and flow label from
inner to outer. The .api was extened to support expressing this and also
adding a common tunnel endpoint type. i find it best to make API changes
in one patch so there are less versions of the API.

Signed-off-by: Neale Ranns <neale@graphiant.com>
Change-Id: I755c1e3f4c475058792af39c1abeda92129efb76

1 files changed, 81 insertions, 1 deletions

diff --git a/src/vnet/tunnel/tunnel_types_api.c b/src/vnet/tunnel/tunnel_types_api.c
index 1d48178e9df..894eecb8407 100644
--- a/src/vnet/tunnel/tunnel_types_api.c
+++ b/src/vnet/tunnel/tunnel_types_api.c
@@ -17,6 +17,8 @@
 
 #include <vnet/api_errno.h>
 #include <vnet/tunnel/tunnel_types_api.h>
+#include <vnet/ip/ip_types_api.h>
+#include <vnet/fib/fib_table.h>
 
 #include <vnet/tunnel/tunnel_types.api_enum.h>
 #include <vnet/tunnel/tunnel_types.api_types.h>
@@ -25,12 +27,14 @@
 STATIC_ASSERT (sizeof (vl_api_tunnel_encap_decap_flags_t) ==
 	       sizeof (tunnel_encap_decap_flags_t),
 	       "tunnel API and internal flags enum size differ");
+STATIC_ASSERT (sizeof (vl_api_tunnel_flags_t) == sizeof (tunnel_flags_t),
+	       "tunnel API and internal flags enum size differ");
 
 int
 tunnel_encap_decap_flags_decode (vl_api_tunnel_encap_decap_flags_t f,
 				 tunnel_encap_decap_flags_t * o)
 {
-  if (f & ~TUNNEL_FLAG_MASK)
+  if (f & ~TUNNEL_ENCAP_DECAP_FLAG_MASK)
     /* unknown flags set */
     return (VNET_API_ERROR_INVALID_VALUE_2);
 
@@ -45,6 +49,23 @@ tunnel_encap_decap_flags_encode (tunnel_encap_decap_flags_t f)
 }
 
 int
+tunnel_flags_decode (vl_api_tunnel_flags_t f, tunnel_flags_t *o)
+{
+  if (f & ~TUNNEL_FLAG_MASK)
+    /* unknown flags set */
+    return (VNET_API_ERROR_INVALID_VALUE_2);
+
+  *o = (tunnel_flags_t) f;
+  return (0);
+}
+
+vl_api_tunnel_flags_t
+tunnel_flags_encode (tunnel_flags_t f)
+{
+  return ((vl_api_tunnel_flags_t) f);
+}
+
+int
 tunnel_mode_decode (vl_api_tunnel_mode_t in, tunnel_mode_t * out)
 {
   switch (in)
@@ -78,6 +99,65 @@ tunnel_mode_encode (tunnel_mode_t in)
   return (out);
 }
 
+int
+tunnel_decode (const vl_api_tunnel_t *in, tunnel_t *out)
+{
+  int rv;
+
+  ip_address_decode2 (&in->src, &out->t_src);
+  ip_address_decode2 (&in->dst, &out->t_dst);
+
+  if (ip_addr_version (&out->t_src) != ip_addr_version (&out->t_dst))
+    return (VNET_API_ERROR_INVALID_PROTOCOL);
+
+  if (0 == ip_address_cmp (&out->t_src, &out->t_dst))
+    return (VNET_API_ERROR_SAME_SRC_DST);
+
+  rv = tunnel_encap_decap_flags_decode (in->encap_decap_flags,
+					&out->t_encap_decap_flags);
+
+  if (rv)
+    return (rv);
+
+  rv = tunnel_mode_decode (in->mode, &out->t_mode);
+
+  if (rv)
+    return (rv);
+
+  rv = tunnel_flags_decode (in->flags, &out->t_flags);
+
+  if (rv)
+    return (rv);
+
+  out->t_table_id = clib_net_to_host_u32 (in->table_id);
+  out->t_fib_index = fib_table_find (
+    ip_address_family_to_fib_proto (ip_addr_version (&out->t_dst)),
+    out->t_table_id);
+
+  if (~0 == out->t_fib_index)
+    return (VNET_API_ERROR_NO_SUCH_FIB);
+
+  out->t_dscp = ip_dscp_decode (in->dscp);
+  out->t_hop_limit = in->hop_limit;
+
+  return (0);
+}
+
+void
+tunnel_encode (const tunnel_t *in, vl_api_tunnel_t *out)
+{
+  ip_address_encode2 (&in->t_src, &out->src);
+  ip_address_encode2 (&in->t_dst, &out->dst);
+
+  out->encap_decap_flags =
+    tunnel_encap_decap_flags_encode (in->t_encap_decap_flags);
+  out->mode = tunnel_mode_encode (in->t_mode);
+  out->flags = tunnel_flags_encode (in->t_flags);
+  out->table_id = clib_host_to_net_u32 (in->t_table_id);
+  out->dscp = ip_dscp_encode (in->t_dscp);
+  out->hop_limit = in->t_hop_limit;
+}
+
 /*
  * fd.io coding-style-patch-verification: ON
  *