CSIT-353: Add basic map-t tests

Change-Id: I78075e445cdd61e0e3cf9353bddeaf6e6bc978fa
Signed-off-by: Matej Klotton <mklotton@cisco.com>

1 files changed, 27 insertions, 2 deletions

diff --git a/resources/libraries/python/Map.py b/resources/libraries/python/Map.py
index b98d488e73..a1db3a8461 100644
--- a/resources/libraries/python/Map.py
+++ b/resources/libraries/python/Map.py
@@ -24,7 +24,7 @@ class Map(object):
 
     @staticmethod
     def map_add_domain(vpp_node, ip4_pfx, ip6_pfx, ip6_src, ea_bits_len,
-                       psid_offset, psid_len):
+                       psid_offset, psid_len, map_t=False):
         """Add map domain on node.
 
         :param vpp_node: VPP node to add map domain on.
@@ -34,6 +34,8 @@ class Map(object):
         :param ea_bits_len: Embedded Address bits length.
         :param psid_offset: Port Set Identifier (PSID) offset.
         :param psid_len: Port Set Identifier (PSID) length.
+        :param map_t: Mapping using translation instead of encapsulation.
+        Default False.
         :type vpp_node: dict
         :type ip4_pfx: str
         :type ip6_pfx: str
@@ -41,17 +43,21 @@ class Map(object):
         :type ea_bits_len: int
         :type psid_offset: int
         :type psid_len: int
+        :type map_t: bool
         :return: Index of created map domain.
         :rtype: int
         :raises RuntimeError: If unable to add map domain.
         """
+        translate = 'map-t' if map_t else ''
+
         output = VatExecutor.cmd_from_template(vpp_node, "map_add_domain.vat",
                                                ip4_pfx=ip4_pfx,
                                                ip6_pfx=ip6_pfx,
                                                ip6_src=ip6_src,
                                                ea_bits_len=ea_bits_len,
                                                psid_offset=psid_offset,
-                                               psid_len=psid_len)
+                                               psid_len=psid_len,
+                                               map_t=translate)
         if output[0]["retval"] == 0:
             return output[0]["index"]
         else:
@@ -261,3 +267,22 @@ class Map(object):
         address |= interface_id  # add Interface ID bits
 
         return str(ipaddress.ip_address(address))
+
+    @staticmethod
+    def compute_ipv6_map_source_address(ipv6_pfx, ipv4_src):
+        """Compute IPv6 source address from IPv4 address for MAP-T algorithm.
+
+        :param ipv6_pfx: 96 bit long IPv6 prefix.
+        :param ipv4_src: IPv4 source address
+        :type ipv6_pfx: str
+        :type ipv4_src: str
+        :return: IPv6 address, combination of IPv6 prefix and IPv4 address.
+        :rtype: str
+        """
+        ipv6_net = ipaddress.ip_network(unicode(ipv6_pfx))
+        ipv4_host = ipaddress.ip_address(unicode(ipv4_src))
+
+        address = ipv6_net.network_address._ip
+        address |= ipv4_host._ip
+
+        return str(ipaddress.ip_address(address))