call mtr.add_suppression("2001:db8::6:6");
flush status;
flush hosts;
flush user_resources;
flush privileges;
select @@global.debug;
@@global.debug

select @@global.max_connect_errors;
@@global.max_connect_errors
100
select @@global.max_user_connections;
@@global.max_user_connections
0
select @@global.max_connections;
@@global.max_connections
151
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 'root'@'2001:db8::6:6';
grant select on test.* to 'root'@'2001:db8::6:6';
create user 'root'@'santa.claus.ipv6.example.com';
grant select on test.* to 'root'@'santa.claus.ipv6.example.com';
connect  con1,"::1",root,,test,$MASTER_MYPORT,;
select "Con1 is alive";
Con1 is alive
Con1 is alive
select current_user();
current_user()
root@localhost
disconnect con1;
connection default;
set global debug_dbug= "+d,vio_peer_addr_fake_ipv6,getnameinfo_error_again";
connect  con2,"::1",root,,test,$MASTER_MYPORT,;
select "Con2 is alive";
Con2 is alive
Con2 is alive
select current_user();
current_user()
root@2001:db8::6:6
disconnect con2;
connection default;
"Dumping performance_schema.host_cache"
IP	2001:db8::6:6
HOST	NULL
HOST_VALIDATED	NO
SUM_CONNECT_ERRORS	0
COUNT_HOST_BLOCKED_ERRORS	0
COUNT_NAMEINFO_TRANSIENT_ERRORS	1
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	0
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  con3,"::1",root,,test,$MASTER_MYPORT,;
select "Con3 is alive";
Con3 is alive
Con3 is alive
select current_user();
current_user()
root@2001:db8::6:6
disconnect con3;
connection default;
"Dumping performance_schema.host_cache"
IP	2001:db8::6:6
HOST	NULL
HOST_VALIDATED	NO
SUM_CONNECT_ERRORS	0
COUNT_HOST_BLOCKED_ERRORS	0
COUNT_NAMEINFO_TRANSIENT_ERRORS	2
COUNT_NAMEINFO_PERMANENT_ERRORS	0
COUNT_FORMAT_ERRORS	0
COUNT_ADDRINFO_TRANSIENT_ERRORS	0
COUNT_ADDRINFO_PERMANENT_ERRORS	0
COUNT_FCRDNS_ERRORS	0
COUNT_HOST_ACL_ERRORS	0
COUNT_NO_AUTH_PLUGIN_ERRORS	0
COUNT_AUTH_PLUGIN_ERRORS	0
COUNT_HANDSHAKE_ERRORS	0
COUNT_PROXY_USER_ERRORS	0
COUNT_PROXY_USER_ACL_ERRORS	0
COUNT_AUTHENTICATION_ERRORS	0
COUNT_SSL_ERRORS	0
COUNT_MAX_USER_CONNECTIONS_ERRORS	0
COUNT_MAX_USER_CONNECTIONS_PER_HOUR_ERRORS	0
COUNT_DEFAULT_DATABASE_ERRORS	0
COUNT_INIT_CONNECT_ERRORS	0
COUNT_LOCAL_ERRORS	0
COUNT_UNKNOWN_ERRORS	0
FIRST_ERROR_SEEN	set
LAST_ERROR_SEEN	set
set global debug_dbug= "+d,vio_peer_addr_fake_ipv6,getnameinfo_fake_ipv6,getaddrinfo_fake_good_ipv6";
connect  con4,"::1",root,,test,$MASTER_MYPORT,;
select "Con4 is alive";
Con4 is alive
Con4 is alive
select current_user();
current_user()
root@santa.claus.ipv6.example.com
disconnect con4;
connection default;
"Dumping performance_schema.host_cache"
IP	2001:db8::6:6
HOST	santa.claus.ipv6.example.com
HOST_VALIDATED	YES
SUM_CONNECT_ERRORS	0
COUNT_HOST_BLOCKED_ERRORS	0
COUNT_NAMEINFO_TRANSIENT_ERRORS	2
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	0
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  con5,"::1",root,,test,$MASTER_MYPORT,;
select "Con5 is alive";
Con5 is alive
Con5 is alive
select current_user();
current_user()
root@santa.claus.ipv6.example.com
disconnect con5;
connection default;
"Dumping performance_schema.host_cache"
IP	2001:db8::6:6
HOST	santa.claus.ipv6.example.com
HOST_VALIDATED	YES
SUM_CONNECT_ERRORS	0
COUNT_HOST_BLOCKED_ERRORS	0
COUNT_NAMEINFO_TRANSIENT_ERRORS	2
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	0
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
revoke select on test.* from 'root'@'2001:db8::6:6';
revoke select on test.* from 'root'@'santa.claus.ipv6.example.com';
drop user 'root'@'2001:db8::6:6';
drop user 'root'@'santa.claus.ipv6.example.com';
set global debug_dbug= default;