PAPI: Add support for format/unformat functions.

With the introduction of new types, like vl_api_address_t
it is now possible to call a message using one of those
functions with a string representation. E.g. for an IP address

ip_add_address(address="1.1.1.1/24")

The language wrapper will automatically convert the string
into the vl_api_address_t representation. Currently
the caller must do the reverse conversion from the returned
named tuple with the unformat function.
rv = get_address_on_interface(sw_if_index=1)
print(VPPFormat.unformat(rv.address))

Change-Id: Ic872b4560b2f4836255bd5260289bfa38c75bc5d
Signed-off-by: Ole Troan <ot@cisco.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/test/test_gbp.py b/test/test_gbp.py
index 132bd247dd1..8e873f345e7 100644
--- a/test/test_gbp.py
+++ b/test/test_gbp.py
@@ -10,6 +10,7 @@ from vpp_ip_route import VppIpRoute, VppRoutePath, VppIpTable
 from vpp_ip import *
 from vpp_mac import *
 from vpp_papi_provider import L2_PORT_TYPE
+from vpp_papi.vpp_format import VPPFormat
 
 from scapy.packet import Raw
 from scapy.layers.l2 import Ether, ARP
@@ -162,7 +163,7 @@ class VppGbpSubnet(VppObject):
                  sw_if_index=None, epg=None):
         self._test = test
         self.table_id = table_id
-        self.prefix = VppIpPrefix(address, address_len)
+        self.prefix = "{}/{}".format(address, address_len)
         self.is_internal = is_internal
         self.sw_if_index = sw_if_index
         self.epg = epg
@@ -172,7 +173,7 @@ class VppGbpSubnet(VppObject):
             1,
             self.table_id,
             self.is_internal,
-            self.prefix.encode(),
+            self.prefix,
             sw_if_index=self.sw_if_index if self.sw_if_index else 0xffffffff,
             epg_id=self.epg if self.epg else 0xffff)
         self._test.registry.register(self, self._test.logger)
@@ -182,7 +183,7 @@ class VppGbpSubnet(VppObject):
             0,
             self.table_id,
             self.is_internal,
-            self.prefix.encode())
+            self.prefix)
 
     def __str__(self):
         return self.object_id()
@@ -195,7 +196,7 @@ class VppGbpSubnet(VppObject):
         ss = self._test.vapi.gbp_subnet_dump()
         for s in ss:
             if s.subnet.table_id == self.table_id and \
-               s.subnet.prefix == self.prefix:
+               VPPFormat.unformat(s.subnet.prefix) == self.prefix:
                 return True
         return False