X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Flibraries%2Fpython%2FMap.py;h=ec1d22cec893f32caf8134f561c43c61687db779;hp=a1db3a846154550b55b551e7404feaa05be9a574;hb=374ea2f45d17f361aa612becba657ecaade0d0b5;hpb=f591e5d8bd72f5f60d3c26222b14b512366fedc3 diff --git a/resources/libraries/python/Map.py b/resources/libraries/python/Map.py index a1db3a8461..ec1d22cec8 100644 --- a/resources/libraries/python/Map.py +++ b/resources/libraries/python/Map.py @@ -1,4 +1,4 @@ -# Copyright (c) 2016 Cisco and/or its affiliates. +# Copyright (c) 2018 Cisco and/or its affiliates. # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at: @@ -35,7 +35,7 @@ class Map(object): :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. + Default False. :type vpp_node: dict :type ip4_pfx: str :type ip6_pfx: str @@ -44,7 +44,7 @@ class Map(object): :type psid_offset: int :type psid_len: int :type map_t: bool - :return: Index of created map domain. + :returns: Index of created map domain. :rtype: int :raises RuntimeError: If unable to add map domain. """ @@ -108,7 +108,8 @@ class Map(object): @staticmethod def get_psid_from_port(port, psid_len, psid_offset): - """Return PSID from port. + """Return PSID from port.:: + 0 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 +-----------+-----------+-------+ @@ -124,8 +125,7 @@ class Map(object): :type port: int :type psid_len: int :type psid_offset: int - - :return: PSID. + :returns: PSID. :rtype: int """ ones = 2**16-1 @@ -149,11 +149,11 @@ 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) @@ -181,27 +181,23 @@ 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 - address. + :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 @@ -212,14 +208,13 @@ class Map(object): psid_offset, psid_len, ipv4_dst, dst_port): """Compute IPv6 destination address from IPv4 address for MAP algorithm. - (RFC 7597) - - | n bits | o bits | s bits | 128-n-o-s bits | - +--------------------+-----------+---------+-----------------------+ - | Rule IPv6 prefix | EA bits |subnet ID| interface ID | - +--------------------+-----------+---------+-----------------------+ - |<--- End-user IPv6 prefix --->| + (RFC 7597):: + | n bits | o bits | s bits | 128-n-o-s bits | + +--------------------+-----------+---------+-----------------------+ + | Rule IPv6 prefix | EA bits |subnet ID| interface ID | + +--------------------+-----------+---------+-----------------------+ + |<--- End-user IPv6 prefix --->| :param ipv4_pfx: Domain IPv4 preffix. :param ipv6_pfx: Domain IPv6 preffix. @@ -235,22 +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) @@ -276,13 +269,13 @@ class Map(object): :param ipv4_src: IPv4 source address :type ipv6_pfx: str :type ipv4_src: str - :return: IPv6 address, combination of IPv6 prefix and IPv4 address. + :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 = ipv6_net.network_address._ip - address |= ipv4_host._ip + address = int(ipv6_net.network_address) + address |= int(ipv4_host) return str(ipaddress.ip_address(address))