api: enforce vla is last and fixed string type

Enforce that variable length fields are the last element of API messages.

Add a 'fixed' version of string type, since dealing with
multiple variable length strings turned out too painful
for the C language bindings.

The string type is now:
{
  string name[64]; // NUL terminated C-string. Essentially decays to u8 name[64]
  string name[];   // Variable length string with embedded len field (vl_api_string_t)
};

The latter notation could be made available to other types as well.
e.g.
{
  vl_api_address_t addresses[];
}
instead of

{
  u32 n_addr;
  vl_api_address_t addresses[n_addr];
};

Type: fix
Change-Id: I18fa17ef47227633752ab50453e8d20a652a9f9b
Signed-off-by: Ole Troan <ot@cisco.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/plugins/map/map.api b/src/plugins/map/map.api
index b15b38a3d19..b1f78124c2c 100644
--- a/src/plugins/map/map.api
+++ b/src/plugins/map/map.api
@@ -13,7 +13,7 @@
  * limitations under the License.
  */
 
-option version = "4.0.0";
+option version = "4.1.0";
 
 import "vnet/ip/ip_types.api";
 
@@ -40,7 +40,7 @@ define map_add_domain
   u8 psid_offset;
   u8 psid_length;
   u16 mtu;
-  string tag[limit=64];
+  string tag[64];
 };
 
 /** \brief Reply for MAP domain add
@@ -121,7 +121,7 @@ define map_domain_details
   u8 psid_length;
   u8 flags;
   u16 mtu;
-  string tag[limit=64];
+  string tag[64];
 };
 
 define map_rule_dump