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 # 1:1 Shared IPv4 address, shared BR
  30 #
  31 def shared11br():
  32     ip4_pfx = ipaddress.ip_network("20.0.0.0/16")
  33     ip6_dst = ipaddress.ip_network("bbbb::/32")
  34     psid_len = 6
  35     for i in range(ip4_pfx.num_addresses):
  36         print(
  37             "map add domain ip4-pfx "
  38             + str(ip4_pfx[i])
  39             + "/32 ip6-pfx ::/0 ip6-shared-src cccc:bbbb::1",
  40             "ea-bits-len 0 psid-offset 6 psid-len",
  41             psid_len,
  42         )
  43         for psid in range(0x1 << psid_len):
  44             print(
  45                 "map add rule index",
  46                 i,
  47                 "psid",
  48                 psid,
  49                 "ip6-dst",
  50                 ip6_dst[(i * (0x1 << psid_len)) + psid],
  51             )
  52
  53
  54 #
  55 # 1:1 Shared IPv4 address
  56 #
  57 def shared11():
  58     ip4_pfx = ipaddress.ip_network("20.0.0.0/16")
  59     ip6_src = ipaddress.ip_network("cccc:bbbb::/64")
  60     ip6_dst = ipaddress.ip_network("bbbb::/32")
  61     psid_len = 6
  62     for i in range(ip4_pfx.num_addresses):
  63         print(
  64             "map add domain ip4-pfx " + str(ip4_pfx[i]) + "/32 ip6-pfx ::/0 ip6-src",
  65             ip6_src[i],
  66             "ea-bits-len 0 psid-offset 6 psid-len",
  67             psid_len,
  68         )
  69         for psid in range(0x1 << psid_len):
  70             print(
  71                 "map add rule index",
  72                 i,
  73                 "psid",
  74                 psid,
  75                 "ip6-dst",
  76                 ip6_dst[(i * (0x1 << psid_len)) + psid],
  77             )
  78
  79
  80 #
  81 # 1:1 Shared IPv4 address small
  82 #
  83 def smallshared11():
  84     ip4_pfx = ipaddress.ip_network("20.0.0.0/24")
  85     ip6_src = ipaddress.ip_network("cccc:bbbb::/64")
  86     ip6_dst = ipaddress.ip_network("bbbb::/32")
  87     psid_len = 6
  88     for i in range(ip4_pfx.num_addresses):
  89         print(
  90             "map add domain ip4-pfx " + str(ip4_pfx[i]) + "/32 ip6-pfx ::/0 ip6-src",
  91             ip6_src[i],
  92             "ea-bits-len 0 psid-offset 6 psid-len",
  93             psid_len,
  94         )
  95         for psid in range(0x1 << psid_len):
  96             print(
  97                 "map add rule index",
  98                 i,
  99                 "psid",
 100                 psid,
 101                 "ip6-dst",
 102                 ip6_dst[(i * (0x1 << psid_len)) + psid],
 103             )
 104
 105
 106 #
 107 # 1:1 Full IPv4 address
 108 #
 109 def full11():
 110     ip4_pfx = ipaddress.ip_network("20.0.0.0/16")
 111     ip6_src = ipaddress.ip_network("cccc:bbbb::/64")
 112     ip6_dst = ipaddress.ip_network("bbbb::/32")
 113     psid_len = 0
 114     for i in range(ip4_pfx.num_addresses):
 115         print(
 116             "map add domain ip4-pfx "
 117             + str(ip4_pfx[i])
 118             + "/32 ip6-pfx "
 119             + str(ip6_dst[i])
 120             + "/128 ip6-src",
 121             ip6_src[i],
 122             "ea-bits-len 0 psid-offset 0 psid-len 0",
 123         )
 124
 125
 126 def full11br():
 127     ip4_pfx = ipaddress.ip_network("20.0.0.0/16")
 128     ip6_dst = ipaddress.ip_network("bbbb::/32")
 129     psid_len = 0
 130     for i in range(ip4_pfx.num_addresses):
 131         print(
 132             "map add domain ip4-pfx "
 133             + str(ip4_pfx[i])
 134             + "/32 ip6-pfx "
 135             + str(ip6_dst[i])
 136             + "/128 ip6-shared-src cccc:bbbb::1",
 137             "ea-bits-len 0 psid-offset 0 psid-len 0",
 138         )
 139
 140
 141 #
 142 # Algorithmic mapping Shared IPv4 address
 143 #
 144 def algo():
 145     print(
 146         "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"
 147     )
 148     print(
 149         "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"
 150     )
 151
 152
 153 #
 154 # IP4 forwarding
 155 #
 156 def ip4():
 157     ip4_pfx = ipaddress.ip_network("20.0.0.0/16")
 158     for i in range(ip4_pfx.num_addresses):
 159         print("ip route add " + str(ip4_pfx[i]) + "/32 via 172.16.0.2")
 160
 161
 162 globals()[args.mapmode]()