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listener.go
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/
listener.go
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package udp
import (
"net"
"github.com/go-gost/core/listener"
"github.com/go-gost/core/logger"
md "github.com/go-gost/core/metadata"
admission "github.com/go-gost/x/admission/wrapper"
limiter "github.com/go-gost/x/limiter/traffic/wrapper"
metrics "github.com/go-gost/x/metrics/wrapper"
"github.com/go-gost/x/registry"
)
func init() {
registry.ListenerRegistry().Register("redu", NewListener)
}
type redirectListener struct {
ln *net.UDPConn
logger logger.Logger
md metadata
options listener.Options
}
func NewListener(opts ...listener.Option) listener.Listener {
options := listener.Options{}
for _, opt := range opts {
opt(&options)
}
return &redirectListener{
logger: options.Logger,
options: options,
}
}
func (l *redirectListener) Init(md md.Metadata) (err error) {
if err = l.parseMetadata(md); err != nil {
return
}
ln, err := l.listenUDP(l.options.Addr)
if err != nil {
return
}
l.ln = ln
return
}
func (l *redirectListener) Accept() (conn net.Conn, err error) {
conn, err = l.accept()
if err != nil {
return
}
conn = metrics.WrapConn(l.options.Service, conn)
conn = admission.WrapConn(l.options.Admission, conn)
conn = limiter.WrapConn(l.options.TrafficLimiter, conn)
return
}
func (l *redirectListener) Addr() net.Addr {
return l.ln.LocalAddr()
}
func (l *redirectListener) Close() error {
return l.ln.Close()
}