A STUN method is a hex number in the range 0x000-0x0FF. The encoding
of a STUN method into a STUN message is described in Section 5.
STUN methods in the range 0x000-0x07F are assigned by IETF Review
RFC8126. STUN methods in the range 0x080-0x0FF are assigned by
Expert Review RFC8126. The responsibility of the expert is to
verify that the selected codepoint(s) is not in use and that the
request is not for an abnormally large number of codepoints.
Technical review of the extension itself is outside the scope of the
designated expert responsibility.
IANA has updated the name for method 0x002 as described below as well
as updated the reference from RFC5389 to RFC8489 for the following
STUN methods:
0x000: Reserved
0x001: Binding
0x002: Reserved; was SharedSecret prior to RFC5389
0x003: Allocate
0x004: Refresh
0x006: Send
0x007: Data
0x008: CreatePermission
0x009: ChannelBind