package dialer import "go.uber.org/atomic" var ( DefaultOptions []Option DefaultInterface = atomic.NewString("") ) type option struct { interfaceName string addrReuse bool routingMark int } type Option func(opt *option) func WithInterface(name string) Option { return func(opt *option) { opt.interfaceName = name } } func WithAddrReuse(reuse bool) Option { return func(opt *option) { opt.addrReuse = reuse } } func WithRoutingMark(mark int) Option { return func(opt *option) { opt.routingMark = mark } }