返回操作系统报告的绑定 address、地址 family 名称和套接字 port：{ port: 12346, family: 'IPv4', address: '127.0.0.1' }
¥Returns the bound address, the address family name and port of the
socket as reported by the operating system:
{ port: 12346, family: 'IPv4', address: '127.0.0.1' }