RADIUS attribute from rfc6572

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PMIP6-Home-DHCP4-Server-Address

The PMIP6-Home-DHCP4-Server-Address (Type value 157) is of type
   Address and contains the IPv4 address of the DHCPv4 server in the
   home network.  The particular DHCP server address is indicated to the
   MAG that serves the concerning MN.  The HAAA MAY assign a DHCP server
   to the MAG in deployments where the MAG acts as a DHCP Relay, as
   defined in .

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |      Type     |   Length      |  Home DHCPv4 server address
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      Home DHCPv4 server address   |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type:
     PMIP6-Home-DHCP4-Server-Address 157.Length:
      = 6 octets.

   Home DHCPv4 server address:
      This field is of type Address and contains a 4-octet IPv4 address
      of the DHCP server.

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