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listener.go
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/
listener.go
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package udp
import (
"net"
"github.com/dolfly/core/common/net/udp"
"github.com/dolfly/core/listener"
"github.com/dolfly/core/logger"
md "github.com/dolfly/core/metadata"
admission "github.com/dolfly/x/admission/wrapper"
xnet "github.com/dolfly/x/internal/net"
limiter "github.com/dolfly/x/limiter/traffic/wrapper"
metrics "github.com/dolfly/x/metrics/wrapper"
"github.com/dolfly/x/registry"
stats "github.com/dolfly/x/stats/wrapper"
)
func init() {
registry.ListenerRegistry().Register("udp", NewListener)
}
type udpListener struct {
ln net.Listener
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 &udpListener{
logger: options.Logger,
options: options,
}
}
func (l *udpListener) Init(md md.Metadata) (err error) {
if err = l.parseMetadata(md); err != nil {
return
}
network := "udp"
if xnet.IsIPv4(l.options.Addr) {
network = "udp4"
}
laddr, err := net.ResolveUDPAddr(network, l.options.Addr)
if err != nil {
return
}
var conn net.PacketConn
conn, err = net.ListenUDP(network, laddr)
if err != nil {
return
}
conn = metrics.WrapPacketConn(l.options.Service, conn)
conn = stats.WrapPacketConn(conn, l.options.Stats)
conn = admission.WrapPacketConn(l.options.Admission, conn)
conn = limiter.WrapPacketConn(l.options.TrafficLimiter, conn)
l.ln = udp.NewListener(conn, &udp.ListenConfig{
Backlog: l.md.backlog,
ReadQueueSize: l.md.readQueueSize,
ReadBufferSize: l.md.readBufferSize,
KeepAlive: l.md.keepalive,
TTL: l.md.ttl,
Logger: l.logger,
})
return
}
func (l *udpListener) Accept() (conn net.Conn, err error) {
return l.ln.Accept()
}
func (l *udpListener) Addr() net.Addr {
return l.ln.Addr()
}
func (l *udpListener) Close() error {
return l.ln.Close()
}