install soname 'auth_ed25519';
flush status;
flush hosts;
flush user_resources;
flush privileges;
select `User`, `Host` from mysql.`user` where `host` like '%\\%%';
User	Host
select `User`, `Host` from mysql.`user` where `user` like '192.%';
User	Host
select `User`, `Host` from mysql.`user` where `user` like '2001:%';
User	Host
select `User`, `Host` from mysql.`user` where `user` like 'santa.claus.%';
User	Host
create user plug1@'santa.claus.ipv4.example.com'
  identified with ed25519;
update mysql.global_priv set priv=json_set(priv, '$.authentication_string', 'foo') where user='plug1';
flush privileges;
create user plug2@'santa.claus.ipv4.example.com'
  identified with ED25519 as 'vubFBzIrapbfHct1/J72dnUryz5VS7lA6XHH8sIx4TI';
set @saved_dbug = @@global.debug_dbug;
set global debug_dbug= "+d,vio_peer_addr_fake_ipv4,getnameinfo_fake_ipv4,getaddrinfo_fake_good_ipv4";
connect(127.0.0.1,plug1,foo,test,PORT,SOCKET);
connect con1, 127.0.0.1, plug1,foo,,$MASTER_MYPORT;
ERROR 28000: Access denied for user 'plug1'@'santa.claus.ipv4.example.com' (using password: YES)
# Dumping performance_schema.host_cache
IP	192.0.2.4
HOST	santa.claus.ipv4.example.com
HOST_VALIDATED	YES
SUM_CONNECT_ERRORS	1
COUNT_HOST_BLOCKED_ERRORS	0
COUNT_NAMEINFO_TRANSIENT_ERRORS	0
COUNT_NAMEINFO_PERMANENT_ERRORS	0
COUNT_FORMAT_ERRORS	0
COUNT_ADDRINFO_TRANSIENT_ERRORS	0
COUNT_ADDRINFO_PERMANENT_ERRORS	0
COUNT_FCRDNS_ERRORS	0
COUNT_HOST_ACL_ERRORS	0
COUNT_NO_AUTH_PLUGIN_ERRORS	0
COUNT_AUTH_PLUGIN_ERRORS	0
COUNT_HANDSHAKE_ERRORS	1
COUNT_PROXY_USER_ERRORS	0
COUNT_PROXY_USER_ACL_ERRORS	0
COUNT_AUTHENTICATION_ERRORS	0
COUNT_SSL_ERRORS	0
COUNT_MAX_USER_CONNECTIONS_ERRORS	0
COUNT_MAX_USER_CONNECTIONS_PER_HOUR_ERRORS	0
COUNT_DEFAULT_DATABASE_ERRORS	0
COUNT_INIT_CONNECT_ERRORS	0
COUNT_LOCAL_ERRORS	0
COUNT_UNKNOWN_ERRORS	0
FIRST_ERROR_SEEN	set
LAST_ERROR_SEEN	set
connect(127.0.0.1,plug2,bar,test,PORT,SOCKET);
connect con1, 127.0.0.1, plug2,bar,,$MASTER_MYPORT;
ERROR 28000: Access denied for user 'plug2'@'santa.claus.ipv4.example.com' (using password: YES)
# Dumping performance_schema.host_cache
IP	192.0.2.4
HOST	santa.claus.ipv4.example.com
HOST_VALIDATED	YES
SUM_CONNECT_ERRORS	1
COUNT_HOST_BLOCKED_ERRORS	0
COUNT_NAMEINFO_TRANSIENT_ERRORS	0
COUNT_NAMEINFO_PERMANENT_ERRORS	0
COUNT_FORMAT_ERRORS	0
COUNT_ADDRINFO_TRANSIENT_ERRORS	0
COUNT_ADDRINFO_PERMANENT_ERRORS	0
COUNT_FCRDNS_ERRORS	0
COUNT_HOST_ACL_ERRORS	0
COUNT_NO_AUTH_PLUGIN_ERRORS	0
COUNT_AUTH_PLUGIN_ERRORS	0
COUNT_HANDSHAKE_ERRORS	1
COUNT_PROXY_USER_ERRORS	0
COUNT_PROXY_USER_ACL_ERRORS	0
COUNT_AUTHENTICATION_ERRORS	1
COUNT_SSL_ERRORS	0
COUNT_MAX_USER_CONNECTIONS_ERRORS	0
COUNT_MAX_USER_CONNECTIONS_PER_HOUR_ERRORS	0
COUNT_DEFAULT_DATABASE_ERRORS	0
COUNT_INIT_CONNECT_ERRORS	0
COUNT_LOCAL_ERRORS	0
COUNT_UNKNOWN_ERRORS	0
FIRST_ERROR_SEEN	set
LAST_ERROR_SEEN	set
connect con1, 127.0.0.1, plug2,foo,,$MASTER_MYPORT;
select current_user();
current_user()
plug2@santa.claus.ipv4.example.com
disconnect con1;
connection default;
# Dumping performance_schema.host_cache
IP	192.0.2.4
HOST	santa.claus.ipv4.example.com
HOST_VALIDATED	YES
SUM_CONNECT_ERRORS	0
COUNT_HOST_BLOCKED_ERRORS	0
COUNT_NAMEINFO_TRANSIENT_ERRORS	0
COUNT_NAMEINFO_PERMANENT_ERRORS	0
COUNT_FORMAT_ERRORS	0
COUNT_ADDRINFO_TRANSIENT_ERRORS	0
COUNT_ADDRINFO_PERMANENT_ERRORS	0
COUNT_FCRDNS_ERRORS	0
COUNT_HOST_ACL_ERRORS	0
COUNT_NO_AUTH_PLUGIN_ERRORS	0
COUNT_AUTH_PLUGIN_ERRORS	0
COUNT_HANDSHAKE_ERRORS	1
COUNT_PROXY_USER_ERRORS	0
COUNT_PROXY_USER_ACL_ERRORS	0
COUNT_AUTHENTICATION_ERRORS	1
COUNT_SSL_ERRORS	0
COUNT_MAX_USER_CONNECTIONS_ERRORS	0
COUNT_MAX_USER_CONNECTIONS_PER_HOUR_ERRORS	0
COUNT_DEFAULT_DATABASE_ERRORS	0
COUNT_INIT_CONNECT_ERRORS	0
COUNT_LOCAL_ERRORS	0
COUNT_UNKNOWN_ERRORS	0
FIRST_ERROR_SEEN	set
LAST_ERROR_SEEN	set
drop user plug1@'santa.claus.ipv4.example.com';
drop user plug2@'santa.claus.ipv4.example.com';
set @@global.debug_dbug = @saved_dbug;
uninstall plugin ed25519;