API: Add support for "defaults"

Add support in the API language for specifying a field default.
Add default support in Python binding.

define foo {
  u16 mtu [default = 1500];
};

This is client side only. I.e. if the mtu argument is not passed to the foo function,
the client language binding will set it default to 1500.

Change-Id: I5df43f3cd87cb300b40ca38e15dcab25b40e424a
Signed-off-by: Ole Troan <ot@cisco.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/src/vpp-api/python/vpp_papi/vpp_transport_socket.py b/src/vpp-api/python/vpp_papi/vpp_transport_socket.py
index 6989e9ac9ba..6e228e46e11 100644
--- a/src/vpp-api/python/vpp_papi/vpp_transport_socket.py
+++ b/src/vpp-api/python/vpp_papi/vpp_transport_socket.py
@@ -193,23 +193,23 @@ class VppTransport(object):
         hdr = self.socket.recv(16)
         if not hdr:
             return
-        (_, l, _) = self.header.unpack(hdr) # If at head of message
+        (_, hdrlen, _) = self.header.unpack(hdr)  # If at head of message
 
         # Read rest of message
-        msg = self.socket.recv(l)
-        if l > len(msg):
+        msg = self.socket.recv(hdrlen)
+        if hdrlen > len(msg):
             nbytes = len(msg)
-            buf = bytearray(l)
+            buf = bytearray(hdrlen)
             view = memoryview(buf)
             view[:nbytes] = msg
             view = view[nbytes:]
-            left = l - nbytes
+            left = hdrlen - nbytes
             while left:
                 nbytes = self.socket.recv_into(view, left)
                 view = view[nbytes:]
                 left -= nbytes
             return buf
-        if l == len(msg):
+        if hdrlen == len(msg):
             return msg
         raise VppTransportSocketIOError(1, 'Unknown socket read error')