OXIESEC PANEL

Name	Size	Modified	Perms
📁 ..	-	02/02/2024 06:09:55 PM	rwxr-xr-x
📄 addrselect.go	9.69 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 addrselect_test.go	8.5 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_aix.go	582 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_android.go	272 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_bsd.go	343 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_darwin.go	298 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_linux.go	642 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_netbsd.go	276 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_openbsd.go	276 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_resnew.go	580 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_resold.go	579 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_socknew.go	753 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_sockold.go	842 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_solaris.go	343 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_stub.go	1.33 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_unix.go	11.35 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_unix_cgo.go	2.24 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_unix_cgo_darwin.go	461 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_unix_cgo_res.go	911 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_unix_cgo_resn.go	998 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_unix_syscall.go	2.99 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 cgo_unix_test.go	1.44 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 conf.go	15.63 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 conf_test.go	12.28 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 conn_test.go	1.82 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 dial.go	25.68 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 dial_test.go	30.14 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 dial_unix_test.go	2.77 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 dnsclient.go	5.65 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 dnsclient_test.go	1.51 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 dnsclient_unix.go	24.26 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 dnsclient_unix_test.go	69.13 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 dnsconfig.go	1.73 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 dnsconfig_unix.go	4.16 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 dnsconfig_unix_test.go	7.07 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 dnsconfig_windows.go	1.6 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 dnsname_test.go	1.96 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 error_plan9.go	224 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 error_plan9_test.go	437 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 error_posix.go	543 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 error_posix_test.go	981 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 error_test.go	20.32 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 error_unix.go	382 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 error_unix_test.go	723 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 error_windows.go	355 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 error_windows_test.go	757 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 example_test.go	8.45 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 external_test.go	4.05 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 fd_fake.go	3.79 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 fd_js.go	627 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 fd_plan9.go	3.56 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 fd_posix.go	4.29 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 fd_unix.go	5.43 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 fd_wasip1.go	496 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 fd_windows.go	6.14 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 file.go	1.69 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 file_plan9.go	2.72 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 file_stub.go	481 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 file_test.go	6.43 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 file_unix.go	2.5 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 file_unix_test.go	2.07 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 file_wasip1.go	2.2 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 file_wasip1_test.go	3.76 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 file_windows.go	521 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 hook.go	894 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 hook_plan9.go	211 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 hook_unix.go	658 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 hook_windows.go	720 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 hosts.go	3.48 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 hosts_test.go	5.6 KB	02/02/2024 06:09:55 PM	rw-r--r--
📁 http	-	02/02/2024 06:09:55 PM	rwxr-xr-x
📄 interface.go	7.26 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 interface_aix.go	4.46 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 interface_bsd.go	2.82 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 interface_bsd_test.go	1.44 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 interface_bsdvar.go	718 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 interface_darwin.go	1.29 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 interface_freebsd.go	1.29 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 interface_linux.go	6.96 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 interface_linux_test.go	3.65 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 interface_plan9.go	4.71 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 interface_solaris.go	2.13 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 interface_stub.go	814 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 interface_test.go	9.76 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 interface_unix_test.go	4.85 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 interface_windows.go	5.43 KB	02/02/2024 06:09:55 PM	rw-r--r--
📁 internal	-	02/02/2024 06:09:55 PM	rwxr-xr-x
📄 ip.go	13.88 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 ip_test.go	25.6 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 iprawsock.go	7.11 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 iprawsock_plan9.go	874 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 iprawsock_posix.go	3.89 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 iprawsock_test.go	5.98 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 ipsock.go	9.05 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 ipsock_plan9.go	7.48 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 ipsock_plan9_test.go	645 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 ipsock_posix.go	7.86 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 ipsock_test.go	6.81 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 listen_test.go	20.5 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 lookup.go	29.04 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 lookup_plan9.go	9.94 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 lookup_test.go	40.62 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 lookup_unix.go	3.35 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 lookup_windows.go	13.8 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 lookup_windows_test.go	8.93 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 mac.go	1.88 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 mac_test.go	3.26 KB	02/02/2024 06:09:55 PM	rw-r--r--
📁 mail	-	02/02/2024 06:09:55 PM	rwxr-xr-x
📄 main_cloexec_test.go	693 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 main_conf_test.go	1.39 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 main_noconf_test.go	467 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 main_plan9_test.go	392 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 main_posix_test.go	1.37 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 main_test.go	7.53 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 main_unix_test.go	1.19 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 main_wasm_test.go	284 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 main_windows_test.go	1 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 mockserver_test.go	10.77 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 mptcpsock_linux.go	3.96 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 mptcpsock_linux_test.go	4.06 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 mptcpsock_stub.go	542 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 net.go	24.56 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 net_fake.go	26.36 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 net_fake_test.go	2.79 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 net_test.go	14 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 net_windows_test.go	16.28 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 netcgo_off.go	222 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 netcgo_on.go	220 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 netgo_netcgo.go	453 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 netgo_off.go	220 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 netgo_on.go	218 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📁 netip	-	02/02/2024 06:09:55 PM	rwxr-xr-x
📄 nss.go	5.48 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 nss_test.go	3.4 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 packetconn_test.go	3.02 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 parse.go	6.04 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 parse_test.go	1.55 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 pipe.go	5.43 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 pipe_test.go	1.2 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 platform_test.go	4.33 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 port.go	1.46 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 port_test.go	1.34 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 port_unix.go	1.24 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 protoconn_test.go	7.44 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 rawconn.go	2.7 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 rawconn_stub_test.go	631 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 rawconn_test.go	4.33 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 rawconn_unix_test.go	2.96 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 rawconn_windows_test.go	3.12 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 resolverdialfunc_test.go	8.25 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 rlimit_js.go	346 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 rlimit_unix.go	1.1 KB	02/02/2024 06:09:55 PM	rw-r--r--
📁 rpc	-	02/02/2024 06:09:55 PM	rwxr-xr-x
📄 sendfile_linux.go	1.12 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 sendfile_linux_test.go	1.93 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 sendfile_stub.go	344 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 sendfile_test.go	8.25 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 sendfile_unix_alt.go	2.04 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 sendfile_windows.go	1.02 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 server_test.go	11.67 KB	02/02/2024 06:09:55 PM	rw-r--r--
📁 smtp	-	02/02/2024 06:09:55 PM	rwxr-xr-x
📄 sock_bsd.go	918 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 sock_cloexec.go	1.38 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 sock_linux.go	993 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 sock_linux_test.go	575 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 sock_plan9.go	262 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 sock_posix.go	6.29 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 sock_stub.go	390 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 sock_windows.go	802 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 sockaddr_posix.go	1.45 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 sockopt_aix.go	1.43 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 sockopt_bsd.go	2.21 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 sockopt_fake.go	955 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 sockopt_linux.go	1.25 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 sockopt_plan9.go	406 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 sockopt_posix.go	2.13 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 sockopt_solaris.go	1.25 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 sockopt_windows.go	1.51 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 sockoptip_bsdvar.go	867 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 sockoptip_linux.go	735 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 sockoptip_posix.go	1.38 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 sockoptip_stub.go	769 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 sockoptip_windows.go	786 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 splice_linux.go	1.69 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 splice_stub.go	376 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 splice_test.go	13.48 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 sys_cloexec.go	962 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 tcpsock.go	11.75 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 tcpsock_plan9.go	2.18 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 tcpsock_posix.go	6.16 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 tcpsock_test.go	17.68 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 tcpsock_unix_test.go	2.34 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 tcpsockopt_darwin.go	770 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 tcpsockopt_dragonfly.go	698 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 tcpsockopt_openbsd.go	365 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 tcpsockopt_plan9.go	525 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 tcpsockopt_posix.go	442 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 tcpsockopt_solaris.go	1.15 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 tcpsockopt_stub.go	399 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 tcpsockopt_unix.go	722 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 tcpsockopt_windows.go	741 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📁 testdata	-	02/02/2024 06:09:55 PM	rwxr-xr-x
📁 textproto	-	02/02/2024 06:09:55 PM	rwxr-xr-x
📄 timeout_test.go	29.11 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 udpsock.go	11.83 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 udpsock_plan9.go	4.64 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 udpsock_plan9_test.go	1.31 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 udpsock_posix.go	7.53 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 udpsock_test.go	17.24 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 unixsock.go	10.12 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 unixsock_linux_test.go	2.29 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 unixsock_plan9.go	1.24 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 unixsock_posix.go	6.64 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 unixsock_readmsg_cloexec.go	654 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 unixsock_readmsg_cmsg_cloexec.go	332 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 unixsock_readmsg_other.go	275 bytes	02/02/2024 06:09:55 PM	rw-r--r--
📄 unixsock_readmsg_test.go	2.51 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 unixsock_test.go	10.64 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 unixsock_windows_test.go	2.03 KB	02/02/2024 06:09:55 PM	rw-r--r--
📁 url	-	02/02/2024 06:09:55 PM	rwxr-xr-x
📄 write_unix_test.go	1.61 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 writev_test.go	5.03 KB	02/02/2024 06:09:55 PM	rw-r--r--
📄 writev_unix.go	666 bytes	02/02/2024 06:09:55 PM	rw-r--r--

Editing: listen_test.go

// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build !plan9

package net

import (
	"fmt"
	"internal/testenv"
	"os"
	"runtime"
	"syscall"
	"testing"
	"time"
)

func (ln *TCPListener) port() string {
	_, port, err := SplitHostPort(ln.Addr().String())
	if err != nil {
		return ""
	}
	return port
}

func (c *UDPConn) port() string {
	_, port, err := SplitHostPort(c.LocalAddr().String())
	if err != nil {
		return ""
	}
	return port
}

var tcpListenerTests = []struct {
	network string
	address string
}{
	{"tcp", ""},
	{"tcp", "0.0.0.0"},
	{"tcp", "::ffff:0.0.0.0"},
	{"tcp", "::"},

{"tcp", "127.0.0.1"},
	{"tcp", "::ffff:127.0.0.1"},
	{"tcp", "::1"},

{"tcp4", ""},
	{"tcp4", "0.0.0.0"},
	{"tcp4", "::ffff:0.0.0.0"},

{"tcp4", "127.0.0.1"},
	{"tcp4", "::ffff:127.0.0.1"},

{"tcp6", ""},
	{"tcp6", "::"},

{"tcp6", "::1"},
}

// TestTCPListener tests both single and double listen to a test
// listener with same address family, same listening address and
// same port.
func TestTCPListener(t *testing.T) {
	switch runtime.GOOS {
	case "plan9":
		t.Skipf("not supported on %s", runtime.GOOS)
	}

for _, tt := range tcpListenerTests {
		if !testableListenArgs(tt.network, JoinHostPort(tt.address, "0"), "") {
			t.Logf("skipping %s test", tt.network+" "+tt.address)
			continue
		}

ln1, err := Listen(tt.network, JoinHostPort(tt.address, "0"))
		if err != nil {
			t.Fatal(err)
		}
		if err := checkFirstListener(tt.network, ln1); err != nil {
			ln1.Close()
			t.Fatal(err)
		}
		ln2, err := Listen(tt.network, JoinHostPort(tt.address, ln1.(*TCPListener).port()))
		if err == nil {
			ln2.Close()
		}
		if err := checkSecondListener(tt.network, tt.address, err); err != nil {
			ln1.Close()
			t.Fatal(err)
		}
		ln1.Close()
	}
}

var udpListenerTests = []struct {
	network string
	address string
}{
	{"udp", ""},
	{"udp", "0.0.0.0"},
	{"udp", "::ffff:0.0.0.0"},
	{"udp", "::"},

{"udp", "127.0.0.1"},
	{"udp", "::ffff:127.0.0.1"},
	{"udp", "::1"},

{"udp4", ""},
	{"udp4", "0.0.0.0"},
	{"udp4", "::ffff:0.0.0.0"},

{"udp4", "127.0.0.1"},
	{"udp4", "::ffff:127.0.0.1"},

{"udp6", ""},
	{"udp6", "::"},

{"udp6", "::1"},
}

// TestUDPListener tests both single and double listen to a test
// listener with same address family, same listening address and
// same port.
func TestUDPListener(t *testing.T) {
	switch runtime.GOOS {
	case "plan9":
		t.Skipf("not supported on %s", runtime.GOOS)
	}

for _, tt := range udpListenerTests {
		if !testableListenArgs(tt.network, JoinHostPort(tt.address, "0"), "") {
			t.Logf("skipping %s test", tt.network+" "+tt.address)
			continue
		}

c1, err := ListenPacket(tt.network, JoinHostPort(tt.address, "0"))
		if err != nil {
			t.Fatal(err)
		}
		if err := checkFirstListener(tt.network, c1); err != nil {
			c1.Close()
			t.Fatal(err)
		}
		c2, err := ListenPacket(tt.network, JoinHostPort(tt.address, c1.(*UDPConn).port()))
		if err == nil {
			c2.Close()
		}
		if err := checkSecondListener(tt.network, tt.address, err); err != nil {
			c1.Close()
			t.Fatal(err)
		}
		c1.Close()
	}
}

var dualStackTCPListenerTests = []struct {
	network1, address1 string // first listener
	network2, address2 string // second listener
	xerr               error  // expected error value, nil or other
}{
	// Test cases and expected results for the attempting 2nd listen on the same port
	// 1st listen                2nd listen                 darwin  freebsd  linux  openbsd
	// ------------------------------------------------------------------------------------
	// "tcp"  ""                 "tcp"  ""                    -        -       -       -
	// "tcp"  ""                 "tcp"  "0.0.0.0"             -        -       -       -
	// "tcp"  "0.0.0.0"          "tcp"  ""                    -        -       -       -
	// ------------------------------------------------------------------------------------
	// "tcp"  ""                 "tcp"  "[::]"                -        -       -       ok
	// "tcp"  "[::]"             "tcp"  ""                    -        -       -       ok
	// "tcp"  "0.0.0.0"          "tcp"  "[::]"                -        -       -       ok
	// "tcp"  "[::]"             "tcp"  "0.0.0.0"             -        -       -       ok
	// "tcp"  "[::ffff:0.0.0.0]" "tcp"  "[::]"                -        -       -       ok
	// "tcp"  "[::]"             "tcp"  "[::ffff:0.0.0.0]"    -        -       -       ok
	// ------------------------------------------------------------------------------------
	// "tcp4" ""                 "tcp6" ""                    ok       ok      ok      ok
	// "tcp6" ""                 "tcp4" ""                    ok       ok      ok      ok
	// "tcp4" "0.0.0.0"          "tcp6" "[::]"                ok       ok      ok      ok
	// "tcp6" "[::]"             "tcp4" "0.0.0.0"             ok       ok      ok      ok
	// ------------------------------------------------------------------------------------
	// "tcp"  "127.0.0.1"        "tcp"  "[::1]"               ok       ok      ok      ok
	// "tcp"  "[::1]"            "tcp"  "127.0.0.1"           ok       ok      ok      ok
	// "tcp4" "127.0.0.1"        "tcp6" "[::1]"               ok       ok      ok      ok
	// "tcp6" "[::1]"            "tcp4" "127.0.0.1"           ok       ok      ok      ok
	//
	// Platform default configurations:
	// darwin, kernel version 11.3.0
	//	net.inet6.ip6.v6only=0 (overridable by sysctl or IPV6_V6ONLY option)
	// freebsd, kernel version 8.2
	//	net.inet6.ip6.v6only=1 (overridable by sysctl or IPV6_V6ONLY option)
	// linux, kernel version 3.0.0
	//	net.ipv6.bindv6only=0 (overridable by sysctl or IPV6_V6ONLY option)
	// openbsd, kernel version 5.0
	//	net.inet6.ip6.v6only=1 (overriding is prohibited)

{"tcp", "", "tcp", "", syscall.EADDRINUSE},
	{"tcp", "", "tcp", "0.0.0.0", syscall.EADDRINUSE},
	{"tcp", "0.0.0.0", "tcp", "", syscall.EADDRINUSE},

{"tcp", "", "tcp", "::", syscall.EADDRINUSE},
	{"tcp", "::", "tcp", "", syscall.EADDRINUSE},
	{"tcp", "0.0.0.0", "tcp", "::", syscall.EADDRINUSE},
	{"tcp", "::", "tcp", "0.0.0.0", syscall.EADDRINUSE},
	{"tcp", "::ffff:0.0.0.0", "tcp", "::", syscall.EADDRINUSE},
	{"tcp", "::", "tcp", "::ffff:0.0.0.0", syscall.EADDRINUSE},

{"tcp4", "", "tcp6", "", nil},
	{"tcp6", "", "tcp4", "", nil},
	{"tcp4", "0.0.0.0", "tcp6", "::", nil},
	{"tcp6", "::", "tcp4", "0.0.0.0", nil},

{"tcp", "127.0.0.1", "tcp", "::1", nil},
	{"tcp", "::1", "tcp", "127.0.0.1", nil},
	{"tcp4", "127.0.0.1", "tcp6", "::1", nil},
	{"tcp6", "::1", "tcp4", "127.0.0.1", nil},
}

// TestDualStackTCPListener tests both single and double listen
// to a test listener with various address families, different
// listening address and same port.
//
// On DragonFly BSD, we expect the kernel version of node under test
// to be greater than or equal to 4.4.
func TestDualStackTCPListener(t *testing.T) {
	switch runtime.GOOS {
	case "plan9":
		t.Skipf("not supported on %s", runtime.GOOS)
	}
	if !supportsIPv4() || !supportsIPv6() {
		t.Skip("both IPv4 and IPv6 are required")
	}

for _, tt := range dualStackTCPListenerTests {
		if !testableListenArgs(tt.network1, JoinHostPort(tt.address1, "0"), "") {
			t.Logf("skipping %s test", tt.network1+" "+tt.address1)
			continue
		}

if !supportsIPv4map() && differentWildcardAddr(tt.address1, tt.address2) {
			tt.xerr = nil
		}
		var firstErr, secondErr error
		for i := 0; i < 5; i++ {
			lns, err := newDualStackListener()
			if err != nil {
				t.Fatal(err)
			}
			port := lns[0].port()
			for _, ln := range lns {
				ln.Close()
			}
			var ln1 Listener
			ln1, firstErr = Listen(tt.network1, JoinHostPort(tt.address1, port))
			if firstErr != nil {
				continue
			}
			if err := checkFirstListener(tt.network1, ln1); err != nil {
				ln1.Close()
				t.Fatal(err)
			}
			ln2, err := Listen(tt.network2, JoinHostPort(tt.address2, ln1.(*TCPListener).port()))
			if err == nil {
				ln2.Close()
			}
			if secondErr = checkDualStackSecondListener(tt.network2, tt.address2, err, tt.xerr); secondErr != nil {
				ln1.Close()
				continue
			}
			ln1.Close()
			break
		}
		if firstErr != nil {
			t.Error(firstErr)
		}
		if secondErr != nil {
			t.Error(secondErr)
		}
	}
}

var dualStackUDPListenerTests = []struct {
	network1, address1 string // first listener
	network2, address2 string // second listener
	xerr               error  // expected error value, nil or other
}{
	{"udp", "", "udp", "", syscall.EADDRINUSE},
	{"udp", "", "udp", "0.0.0.0", syscall.EADDRINUSE},
	{"udp", "0.0.0.0", "udp", "", syscall.EADDRINUSE},

{"udp", "", "udp", "::", syscall.EADDRINUSE},
	{"udp", "::", "udp", "", syscall.EADDRINUSE},
	{"udp", "0.0.0.0", "udp", "::", syscall.EADDRINUSE},
	{"udp", "::", "udp", "0.0.0.0", syscall.EADDRINUSE},
	{"udp", "::ffff:0.0.0.0", "udp", "::", syscall.EADDRINUSE},
	{"udp", "::", "udp", "::ffff:0.0.0.0", syscall.EADDRINUSE},

{"udp4", "", "udp6", "", nil},
	{"udp6", "", "udp4", "", nil},
	{"udp4", "0.0.0.0", "udp6", "::", nil},
	{"udp6", "::", "udp4", "0.0.0.0", nil},

{"udp", "127.0.0.1", "udp", "::1", nil},
	{"udp", "::1", "udp", "127.0.0.1", nil},
	{"udp4", "127.0.0.1", "udp6", "::1", nil},
	{"udp6", "::1", "udp4", "127.0.0.1", nil},
}

// TestDualStackUDPListener tests both single and double listen
// to a test listener with various address families, different
// listening address and same port.
//
// On DragonFly BSD, we expect the kernel version of node under test
// to be greater than or equal to 4.4.
func TestDualStackUDPListener(t *testing.T) {
	switch runtime.GOOS {
	case "plan9":
		t.Skipf("not supported on %s", runtime.GOOS)
	}
	if !supportsIPv4() || !supportsIPv6() {
		t.Skip("both IPv4 and IPv6 are required")
	}

for _, tt := range dualStackUDPListenerTests {
		if !testableListenArgs(tt.network1, JoinHostPort(tt.address1, "0"), "") {
			t.Logf("skipping %s test", tt.network1+" "+tt.address1)
			continue
		}

if !supportsIPv4map() && differentWildcardAddr(tt.address1, tt.address2) {
			tt.xerr = nil
		}
		var firstErr, secondErr error
		for i := 0; i < 5; i++ {
			cs, err := newDualStackPacketListener()
			if err != nil {
				t.Fatal(err)
			}
			port := cs[0].port()
			for _, c := range cs {
				c.Close()
			}
			var c1 PacketConn
			c1, firstErr = ListenPacket(tt.network1, JoinHostPort(tt.address1, port))
			if firstErr != nil {
				continue
			}
			if err := checkFirstListener(tt.network1, c1); err != nil {
				c1.Close()
				t.Fatal(err)
			}
			c2, err := ListenPacket(tt.network2, JoinHostPort(tt.address2, c1.(*UDPConn).port()))
			if err == nil {
				c2.Close()
			}
			if secondErr = checkDualStackSecondListener(tt.network2, tt.address2, err, tt.xerr); secondErr != nil {
				c1.Close()
				continue
			}
			c1.Close()
			break
		}
		if firstErr != nil {
			t.Error(firstErr)
		}
		if secondErr != nil {
			t.Error(secondErr)
		}
	}
}

func differentWildcardAddr(i, j string) bool {
	if (i == "" || i == "0.0.0.0" || i == "::ffff:0.0.0.0") && (j == "" || j == "0.0.0.0" || j == "::ffff:0.0.0.0") {
		return false
	}
	if i == "[::]" && j == "[::]" {
		return false
	}
	return true
}

func checkFirstListener(network string, ln any) error {
	switch network {
	case "tcp":
		fd := ln.(*TCPListener).fd
		if err := checkDualStackAddrFamily(fd); err != nil {
			return err
		}
	case "tcp4":
		fd := ln.(*TCPListener).fd
		if fd.family != syscall.AF_INET {
			return fmt.Errorf("%v got %v; want %v", fd.laddr, fd.family, syscall.AF_INET)
		}
	case "tcp6":
		fd := ln.(*TCPListener).fd
		if fd.family != syscall.AF_INET6 {
			return fmt.Errorf("%v got %v; want %v", fd.laddr, fd.family, syscall.AF_INET6)
		}
	case "udp":
		fd := ln.(*UDPConn).fd
		if err := checkDualStackAddrFamily(fd); err != nil {
			return err
		}
	case "udp4":
		fd := ln.(*UDPConn).fd
		if fd.family != syscall.AF_INET {
			return fmt.Errorf("%v got %v; want %v", fd.laddr, fd.family, syscall.AF_INET)
		}
	case "udp6":
		fd := ln.(*UDPConn).fd
		if fd.family != syscall.AF_INET6 {
			return fmt.Errorf("%v got %v; want %v", fd.laddr, fd.family, syscall.AF_INET6)
		}
	default:
		return UnknownNetworkError(network)
	}
	return nil
}

func checkSecondListener(network, address string, err error) error {
	switch network {
	case "tcp", "tcp4", "tcp6":
		if err == nil {
			return fmt.Errorf("%s should fail", network+" "+address)
		}
	case "udp", "udp4", "udp6":
		if err == nil {
			return fmt.Errorf("%s should fail", network+" "+address)
		}
	default:
		return UnknownNetworkError(network)
	}
	return nil
}

func checkDualStackSecondListener(network, address string, err, xerr error) error {
	switch network {
	case "tcp", "tcp4", "tcp6":
		if xerr == nil && err != nil || xerr != nil && err == nil {
			return fmt.Errorf("%s got %v; want %v", network+" "+address, err, xerr)
		}
	case "udp", "udp4", "udp6":
		if xerr == nil && err != nil || xerr != nil && err == nil {
			return fmt.Errorf("%s got %v; want %v", network+" "+address, err, xerr)
		}
	default:
		return UnknownNetworkError(network)
	}
	return nil
}

func checkDualStackAddrFamily(fd *netFD) error {
	switch a := fd.laddr.(type) {
	case *TCPAddr:
		// If a node under test supports both IPv6 capability
		// and IPv6 IPv4-mapping capability, we can assume
		// that the node listens on a wildcard address with an
		// AF_INET6 socket.
		if supportsIPv4map() && fd.laddr.(*TCPAddr).isWildcard() {
			if fd.family != syscall.AF_INET6 {
				return fmt.Errorf("Listen(%s, %v) returns %v; want %v", fd.net, fd.laddr, fd.family, syscall.AF_INET6)
			}
		} else {
			if fd.family != a.family() {
				return fmt.Errorf("Listen(%s, %v) returns %v; want %v", fd.net, fd.laddr, fd.family, a.family())
			}
		}
	case *UDPAddr:
		// If a node under test supports both IPv6 capability
		// and IPv6 IPv4-mapping capability, we can assume
		// that the node listens on a wildcard address with an
		// AF_INET6 socket.
		if supportsIPv4map() && fd.laddr.(*UDPAddr).isWildcard() {
			if fd.family != syscall.AF_INET6 {
				return fmt.Errorf("ListenPacket(%s, %v) returns %v; want %v", fd.net, fd.laddr, fd.family, syscall.AF_INET6)
			}
		} else {
			if fd.family != a.family() {
				return fmt.Errorf("ListenPacket(%s, %v) returns %v; want %v", fd.net, fd.laddr, fd.family, a.family())
			}
		}
	default:
		return fmt.Errorf("unexpected protocol address type: %T", a)
	}
	return nil
}

func TestWildWildcardListener(t *testing.T) {
	testenv.MustHaveExternalNetwork(t)

switch runtime.GOOS {
	case "plan9":
		t.Skipf("not supported on %s", runtime.GOOS)
	}

defer func() {
		if p := recover(); p != nil {
			t.Fatalf("panicked: %v", p)
		}
	}()

if ln, err := Listen("tcp", ""); err == nil {
		ln.Close()
	}
	if ln, err := ListenPacket("udp", ""); err == nil {
		ln.Close()
	}
	if ln, err := ListenTCP("tcp", nil); err == nil {
		ln.Close()
	}
	if ln, err := ListenUDP("udp", nil); err == nil {
		ln.Close()
	}
	if ln, err := ListenIP("ip:icmp", nil); err == nil {
		ln.Close()
	}
}

var ipv4MulticastListenerTests = []struct {
	net   string
	gaddr *UDPAddr // see RFC 4727
}{
	{"udp", &UDPAddr{IP: IPv4(224, 0, 0, 254), Port: 12345}},

{"udp4", &UDPAddr{IP: IPv4(224, 0, 0, 254), Port: 12345}},
}

// TestIPv4MulticastListener tests both single and double listen to a
// test listener with same address family, same group address and same
// port.
func TestIPv4MulticastListener(t *testing.T) {
	testenv.MustHaveExternalNetwork(t)

switch runtime.GOOS {
	case "android", "plan9":
		t.Skipf("not supported on %s", runtime.GOOS)
	}
	if !supportsIPv4() {
		t.Skip("IPv4 is not supported")
	}

closer := func(cs []*UDPConn) {
		for _, c := range cs {
			if c != nil {
				c.Close()
			}
		}
	}

for _, ifi := range []*Interface{loopbackInterface(), nil} {
		// Note that multicast interface assignment by system
		// is not recommended because it usually relies on
		// routing stuff for finding out an appropriate
		// nexthop containing both network and link layer
		// adjacencies.
		if ifi == nil || !*testIPv4 {
			continue
		}
		for _, tt := range ipv4MulticastListenerTests {
			var err error
			cs := make([]*UDPConn, 2)
			if cs[0], err = ListenMulticastUDP(tt.net, ifi, tt.gaddr); err != nil {
				t.Fatal(err)
			}
			if err := checkMulticastListener(cs[0], tt.gaddr.IP); err != nil {
				closer(cs)
				t.Fatal(err)
			}
			if cs[1], err = ListenMulticastUDP(tt.net, ifi, tt.gaddr); err != nil {
				closer(cs)
				t.Fatal(err)
			}
			if err := checkMulticastListener(cs[1], tt.gaddr.IP); err != nil {
				closer(cs)
				t.Fatal(err)
			}
			closer(cs)
		}
	}
}

var ipv6MulticastListenerTests = []struct {
	net   string
	gaddr *UDPAddr // see RFC 4727
}{
	{"udp", &UDPAddr{IP: ParseIP("ff01::114"), Port: 12345}},
	{"udp", &UDPAddr{IP: ParseIP("ff02::114"), Port: 12345}},
	{"udp", &UDPAddr{IP: ParseIP("ff04::114"), Port: 12345}},
	{"udp", &UDPAddr{IP: ParseIP("ff05::114"), Port: 12345}},
	{"udp", &UDPAddr{IP: ParseIP("ff08::114"), Port: 12345}},
	{"udp", &UDPAddr{IP: ParseIP("ff0e::114"), Port: 12345}},

{"udp6", &UDPAddr{IP: ParseIP("ff01::114"), Port: 12345}},
	{"udp6", &UDPAddr{IP: ParseIP("ff02::114"), Port: 12345}},
	{"udp6", &UDPAddr{IP: ParseIP("ff04::114"), Port: 12345}},
	{"udp6", &UDPAddr{IP: ParseIP("ff05::114"), Port: 12345}},
	{"udp6", &UDPAddr{IP: ParseIP("ff08::114"), Port: 12345}},
	{"udp6", &UDPAddr{IP: ParseIP("ff0e::114"), Port: 12345}},
}

// TestIPv6MulticastListener tests both single and double listen to a
// test listener with same address family, same group address and same
// port.
func TestIPv6MulticastListener(t *testing.T) {
	testenv.MustHaveExternalNetwork(t)

switch runtime.GOOS {
	case "plan9":
		t.Skipf("not supported on %s", runtime.GOOS)
	}
	if !supportsIPv6() {
		t.Skip("IPv6 is not supported")
	}
	if os.Getuid() != 0 {
		t.Skip("must be root")
	}

closer := func(cs []*UDPConn) {
		for _, c := range cs {
			if c != nil {
				c.Close()
			}
		}
	}

for _, ifi := range []*Interface{loopbackInterface(), nil} {
		// Note that multicast interface assignment by system
		// is not recommended because it usually relies on
		// routing stuff for finding out an appropriate
		// nexthop containing both network and link layer
		// adjacencies.
		if ifi == nil && !*testIPv6 {
			continue
		}
		for _, tt := range ipv6MulticastListenerTests {
			var err error
			cs := make([]*UDPConn, 2)
			if cs[0], err = ListenMulticastUDP(tt.net, ifi, tt.gaddr); err != nil {
				t.Fatal(err)
			}
			if err := checkMulticastListener(cs[0], tt.gaddr.IP); err != nil {
				closer(cs)
				t.Fatal(err)
			}
			if cs[1], err = ListenMulticastUDP(tt.net, ifi, tt.gaddr); err != nil {
				closer(cs)
				t.Fatal(err)
			}
			if err := checkMulticastListener(cs[1], tt.gaddr.IP); err != nil {
				closer(cs)
				t.Fatal(err)
			}
			closer(cs)
		}
	}
}

func checkMulticastListener(c *UDPConn, ip IP) error {
	if ok, err := multicastRIBContains(ip); err != nil {
		return err
	} else if !ok {
		return fmt.Errorf("%s not found in multicast rib", ip.String())
	}
	la := c.LocalAddr()
	if la, ok := la.(*UDPAddr); !ok || la.Port == 0 {
		return fmt.Errorf("got %v; want a proper address with non-zero port number", la)
	}
	return nil
}

func multicastRIBContains(ip IP) (bool, error) {
	switch runtime.GOOS {
	case "aix", "dragonfly", "netbsd", "openbsd", "plan9", "solaris", "illumos", "windows":
		return true, nil // not implemented yet
	case "linux":
		if runtime.GOARCH == "arm" || runtime.GOARCH == "alpha" {
			return true, nil // not implemented yet
		}
	}
	ift, err := Interfaces()
	if err != nil {
		return false, err
	}
	for _, ifi := range ift {
		ifmat, err := ifi.MulticastAddrs()
		if err != nil {
			return false, err
		}
		for _, ifma := range ifmat {
			if ifma.(*IPAddr).IP.Equal(ip) {
				return true, nil
			}
		}
	}
	return false, nil
}

// Issue 21856.
func TestClosingListener(t *testing.T) {
	ln := newLocalListener(t, "tcp")
	addr := ln.Addr()

go func() {
		for {
			c, err := ln.Accept()
			if err != nil {
				return
			}
			c.Close()
		}
	}()

// Let the goroutine start. We don't sleep long: if the
	// goroutine doesn't start, the test will pass without really
	// testing anything, which is OK.
	time.Sleep(time.Millisecond)

ln.Close()

ln2, err := Listen("tcp", addr.String())
	if err != nil {
		t.Fatal(err)
	}
	ln2.Close()
}

func TestListenConfigControl(t *testing.T) {
	switch runtime.GOOS {
	case "plan9":
		t.Skipf("not supported on %s", runtime.GOOS)
	}

t.Run("StreamListen", func(t *testing.T) {
		for _, network := range []string{"tcp", "tcp4", "tcp6", "unix", "unixpacket"} {
			if !testableNetwork(network) {
				continue
			}
			ln := newLocalListener(t, network, &ListenConfig{Control: controlOnConnSetup})
			ln.Close()
		}
	})
	t.Run("PacketListen", func(t *testing.T) {
		for _, network := range []string{"udp", "udp4", "udp6", "unixgram"} {
			if !testableNetwork(network) {
				continue
			}
			c := newLocalPacketListener(t, network, &ListenConfig{Control: controlOnConnSetup})
			c.Close()
		}
	})
}