Function: nat64PrefixesFrom()
nat64PrefixesFrom(
addresses):Nat64Prefix[]
Defined in: packages/agentos/src/io/media/images/networkAddress.ts:155
The NAT64 prefixes that addresses reveal, when they are the IPv6
addresses a resolver gave for ipv4only.arpa (RFC 7050). That name has
two addresses, both IPv4: 192.0.0.170 and 192.0.0.171. An IPv6 answer was
therefore made by a DNS64 resolver, from the network's NAT64 prefix, and
the place of one of those two addresses in it gives the prefix and its
length. Byte 8 must be zero where the format reserves it (every length but
96), so bytes that only happen to spell one of the two addresses around a
non-zero byte 8 name no prefix. Text that is not an IPv6 address is passed
over.
Parameters
addresses
readonly string[]
Returns
Example
nat64PrefixesFrom(['64:ff9b::c000:aa']); // [{ bytes: [0, 0x64, 0xff, 0x9b, 0, 0, 0, 0, 0, 0, 0, 0], length: 96 }]
nat64PrefixesFrom([]); // []: the network has no DNS64