src/plugins/map/gen-rules.py

   1 #!/usr/bin/env python3
   2
   3 # Copyright (c) 2015 Cisco and/or its affiliates.
   4 # Licensed under the Apache License, Version 2.0 (the "License");
   5 # you may not use this file except in compliance with the License.
   6 # You may obtain a copy of the License at:
   7 #
   8 #     http://www.apache.org/licenses/LICENSE-2.0
   9 #
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS,
  12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15
  16
  17 import ipaddress
  18 import argparse
  19 import sys
  20
  21 # map add domain ip4-pfx <pfx> ip6-pfx ::/0 ip6-src <ip6-src> ea-bits-len 0 psid-offset 6 psid-len 6
  22 # map add rule index <0> psid <psid> ip6-dst <ip6-dst>
  23
  24 parser = argparse.ArgumentParser(description="MAP VPP configuration generator")
  25 parser.add_argument("-t", action="store", dest="mapmode")
  26 args = parser.parse_args()
  27
  28
  29 #
  30 # 1:1 Shared IPv4 address, shared BR
  31 #
  32 def shared11br():
  33     ip4_pfx = ipaddress.ip_network("20.0.0.0/16")
  34     ip6_dst = ipaddress.ip_network("bbbb::/32")
  35     psid_len = 6
  36     for i in range(ip4_pfx.num_addresses):
  37         print(
  38             "map add domain ip4-pfx "
  39             + str(ip4_pfx[i])
  40             + "/32 ip6-pfx ::/0 ip6-shared-src cccc:bbbb::1",
  41             "ea-bits-len 0 psid-offset 6 psid-len",
  42             psid_len,
  43         )
  44         for psid in range(0x1 << psid_len):
  45             print(
  46                 "map add rule index",
  47                 i,
  48                 "psid",
  49                 psid,
  50                 "ip6-dst",
  51                 ip6_dst[(i * (0x1 << psid_len)) + psid],
  52             )
  53
  54
  55 #
  56 # 1:1 Shared IPv4 address
  57 #
  58 def shared11():
  59     ip4_pfx = ipaddress.ip_network("20.0.0.0/16")
  60     ip6_src = ipaddress.ip_network("cccc:bbbb::/64")
  61     ip6_dst = ipaddress.ip_network("bbbb::/32")
  62     psid_len = 6
  63     for i in range(ip4_pfx.num_addresses):
  64         print(
  65             "map add domain ip4-pfx " + str(ip4_pfx[i]) + "/32 ip6-pfx ::/0 ip6-src",
  66             ip6_src[i],
  67             "ea-bits-len 0 psid-offset 6 psid-len",
  68             psid_len,
  69         )
  70         for psid in range(0x1 << psid_len):
  71             print(
  72                 "map add rule index",
  73                 i,
  74                 "psid",
  75                 psid,
  76                 "ip6-dst",
  77                 ip6_dst[(i * (0x1 << psid_len)) + psid],
  78             )
  79
  80
  81 #
  82 # 1:1 Shared IPv4 address small
  83 #
  84 def smallshared11():
  85     ip4_pfx = ipaddress.ip_network("20.0.0.0/24")
  86     ip6_src = ipaddress.ip_network("cccc:bbbb::/64")
  87     ip6_dst = ipaddress.ip_network("bbbb::/32")
  88     psid_len = 6
  89     for i in range(ip4_pfx.num_addresses):
  90         print(
  91             "map add domain ip4-pfx " + str(ip4_pfx[i]) + "/32 ip6-pfx ::/0 ip6-src",
  92             ip6_src[i],
  93             "ea-bits-len 0 psid-offset 6 psid-len",
  94             psid_len,
  95         )
  96         for psid in range(0x1 << psid_len):
  97             print(
  98                 "map add rule index",
  99                 i,
 100                 "psid",
 101                 psid,
 102                 "ip6-dst",
 103                 ip6_dst[(i * (0x1 << psid_len)) + psid],
 104             )
 105
 106
 107 #
 108 # 1:1 Full IPv4 address
 109 #
 110 def full11():
 111     ip4_pfx = ipaddress.ip_network("20.0.0.0/16")
 112     ip6_src = ipaddress.ip_network("cccc:bbbb::/64")
 113     ip6_dst = ipaddress.ip_network("bbbb::/32")
 114     psid_len = 0
 115     for i in range(ip4_pfx.num_addresses):
 116         print(
 117             "map add domain ip4-pfx "
 118             + str(ip4_pfx[i])
 119             + "/32 ip6-pfx "
 120             + str(ip6_dst[i])
 121             + "/128 ip6-src",
 122             ip6_src[i],
 123             "ea-bits-len 0 psid-offset 0 psid-len 0",
 124         )
 125
 126
 127 def full11br():
 128     ip4_pfx = ipaddress.ip_network("20.0.0.0/16")
 129     ip6_dst = ipaddress.ip_network("bbbb::/32")
 130     psid_len = 0
 131     for i in range(ip4_pfx.num_addresses):
 132         print(
 133             "map add domain ip4-pfx "
 134             + str(ip4_pfx[i])
 135             + "/32 ip6-pfx "
 136             + str(ip6_dst[i])
 137             + "/128 ip6-shared-src cccc:bbbb::1",
 138             "ea-bits-len 0 psid-offset 0 psid-len 0",
 139         )
 140
 141
 142 #
 143 # Algorithmic mapping Shared IPv4 address
 144 #
 145 def algo():
 146     print(
 147         "map add domain ip4-pfx 20.0.0.0/24 ip6-pfx bbbb::/32 ip6-src cccc:bbbb::1 ea-bits-len 16 psid-offset 6 psid-len 8"
 148     )
 149     print(
 150         "map add domain ip4-pfx 20.0.1.0/24 ip6-pfx bbbb:1::/32 ip6-src cccc:bbbb::2 ea-bits-len 8 psid-offset 0 psid-len 0"
 151     )
 152
 153
 154 #
 155 # IP4 forwarding
 156 #
 157 def ip4():
 158     ip4_pfx = ipaddress.ip_network("20.0.0.0/16")
 159     for i in range(ip4_pfx.num_addresses):
 160         print("ip route add " + str(ip4_pfx[i]) + "/32 via 172.16.0.2")
 161
 162
 163 globals()[args.mapmode]()