evdns_add_server_port  325 opal/mca/event/libevent2022/libevent/include/event2/dns_compat.h struct evdns_server_port *evdns_add_server_port(evutil_socket_t socket, int flags, evdns_request_callback_fn_type callback, void *user_data);
evdns_add_server_port  404 opal/mca/event/libevent2022/libevent/test/regress_dns.c 	port = evdns_add_server_port(sock, 0, dns_server_request_cb, NULL);