The TCP-LISTEN is not used only for ipv4, it could be set with export "SOCAT_DEFAULT_LISTEN_IP={4,6}" for socat to listening on different ip protocol, so no need to create a new wsrep_sst_xtrabackup-v2-ipv6 plugin.
xianghui@Thinkpad-x240:~/workplace/github$ export SOCAT_DEFAULT_LISTEN_IP=6 xianghui@Thinkpad-x240:~/workplace/github$ socat -u TCP-LISTEN:4444,reuseaddr stdio
xianghui@Thinkpad-x240:~/workplace/github$ telnet :: 4444 Trying ::... Connected to ::. Escape character is '^]'.
The TCP-LISTEN is not used only for ipv4, it could be set with export "SOCAT_ DEFAULT_ LISTEN_ IP={4,6} " for socat to listening on different ip protocol, so no need to create a new wsrep_sst_ xtrabackup- v2-ipv6 plugin.
xianghui@ Thinkpad- x240:~/ workplace/ github$ export SOCAT_DEFAULT_ LISTEN_ IP=6 Thinkpad- x240:~/ workplace/ github$ socat -u TCP-LISTEN: 4444,reuseaddr stdio
xianghui@
xianghui@ Thinkpad- x240:~/ workplace/ github$ telnet :: 4444
Trying ::...
Connected to ::.
Escape character is '^]'.