| <multicast_connection> | ::= <inbound_connection> | <outbound_connection> |
| <inbound_connection> | ::= "multicast://" ":" [ <portnumber> ] [ <auto_join> ] |
| <outbound_connection> | ::= "multicast://" <host> ":" <portnumber> |
| <multicast_permission> | ::= "multicast://"[<hostspec>] ":" <portspec> |
| <host> | ::= <host name> | <ipaddr> |
| <ipaddr> | ::= IPv4address | '[' IPv6address ']' |
| <hostspec> | ::= <host> | "*" |
| <auto_join> | ::= "?join="<host> |
| <portspec> | ::= <portnumber> | <portrange> | "*" |
| <portnumber> | ::= numeric port number |
| <portrange> | ::= <portnumber> "-" | "-" <portnumber> | <portnumber> "-" <portnumber> |
Note that, per RFC 3986, protocol schemes are case-insensitive. The above BNF reflects the normalized form.