Pylint fixes

[csit.git] / resources / libraries / python / Map.py

diff --git a/resources/libraries/python/Map.py b/resources/libraries/python/Map.py
index b98d488..7e4d219 100644 (file)
--- 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
-        :return: Index of created map domain.
+        :type map_t: bool
+        :returns: 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:
@@ -118,8 +124,7 @@ class Map(object):
         :type port: int
         :type psid_len: int
         :type psid_offset: int
-
-        :return: PSID.
+        :returns: PSID.
         :rtype: int
         """
         ones = 2**16-1
@@ -143,11 +148,11 @@ class Map(object):
         :type ea_bit_len: int
         :type psid_len: int
         :type psid: int
-        :return: Number representing EA bit field of destination IPv6 address.
+        :returns: Number representing EA bit field of destination IPv6 address.
         :rtype: int
         """
-        v4_suffix_len = ipv4_net._max_prefixlen - ipv4_net.prefixlen
-        v4_suffix = ipv4_net.network_address._ip ^ ipv4_host._ip
+        v4_suffix_len = ipv4_net.max_prefixlen - ipv4_net.prefixlen
+        v4_suffix = int(ipv4_net.network_address) ^ int(ipv4_host)
 
         if ipv4_net.prefixlen + ea_bit_len <= 32:
             ea_bits = v4_suffix >> (v4_suffix_len - ea_bit_len)
@@ -175,27 +180,23 @@ class Map(object):
         :type dst_ip: ipaddress.IPv4Address
         :type ea_bit_len: int
         :type psid: int
-        :return: Number representing interface id field of destination IPv6
+        :returns: Number representing interface id field of destination IPv6
         address.
         :rtype: int
         """
         if rule_net.prefixlen + ea_bit_len < 32:
-            v4_suffix_len = rule_net._max_prefixlen - rule_net.prefixlen
-            v4_suffix = rule_net.network_address._ip ^ dst_ip._ip
+            v4_suffix_len = rule_net.max_prefixlen - rule_net.prefixlen
+            v4_suffix = int(rule_net.network_address) ^ int(dst_ip)
             ea_bits = v4_suffix >> (v4_suffix_len - ea_bit_len)
-            address = rule_net.network_address._ip >> v4_suffix_len
+            address = int(rule_net.network_address) >> v4_suffix_len
             address <<= ea_bit_len
             address |= ea_bits
             address <<= 32 - rule_net.prefixlen - ea_bit_len
             address <<= 16
-            # psid_field = 0
-            # address = address | psid_field
         elif rule_net.prefixlen + ea_bit_len == 32:
-            address = dst_ip._ip << 16
-            # psid_field = 0
-            # address = address | psid_field
+            address = int(dst_ip) << 16
         else:
-            address = dst_ip._ip << 16
+            address = int(dst_ip) << 16
             address |= psid
             return address
 
@@ -229,22 +230,20 @@ class Map(object):
         :type psid_len: int
         :type ipv4_dst: str
         :type dst_port: int
-        :return: Computed IPv6 address.
+        :returns: Computed IPv6 address.
         :rtype: str
         """
         ipv6_net = ipaddress.ip_network(unicode(ipv6_pfx))
         ipv4_net = ipaddress.ip_network(unicode(ipv4_pfx))
         ipv4_host = ipaddress.ip_address(unicode(ipv4_dst))
 
-        ipv6_host_len = ipv6_net._max_prefixlen - ipv6_net.prefixlen
-        ipv4_host_len = ipv4_net._max_prefixlen - ipv4_net.prefixlen
+        ipv6_host_len = ipv6_net.max_prefixlen - ipv6_net.prefixlen
         end_user_v6_pfx_len = ipv6_net.prefixlen + ea_bit_len
         psid = Map.get_psid_from_port(dst_port, psid_len, psid_offset)
 
-        rule_v6_pfx = ipv6_net.network_address._ip >> ipv6_host_len
+        rule_v6_pfx = int(ipv6_net.network_address) >> ipv6_host_len
         ea_bits = Map._make_ea_bits(ipv4_net, ipv4_host, ea_bit_len, psid_len,
                                     psid)
-        subnet_id = 0
         interface_id = Map._make_interface_id(ipv4_net, ipv4_host, ea_bit_len,
                                               psid)
 
@@ -261,3 +260,22 @@ 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
+        :returns: 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 = int(ipv6_net.network_address)
+        address |= int(ipv4_host)
+
+        return str(ipaddress.ip_address(address))