| | ... | IPv4 prefix length + ea bits length == 32 (o + r == 32)
| | ... | psid_length = 0, ip6_prefix < 64, ip4_prefix <= 32
| | ...
| | ... | IPv4 prefix length + ea bits length == 32 (o + r == 32)
| | ... | psid_length = 0, ip6_prefix < 64, ip4_prefix <= 32
| | ...