/
system.go
47 lines (41 loc) · 918 Bytes
/
system.go
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package transport
import (
"fmt"
"net"
reuse "github.com/libp2p/go-reuseport"
)
type sysTransport struct {
net.Listener
*net.Dialer
*net.UDPConn
}
func (s *sysTransport) Close() error {
e1 := s.Listener.Close()
e2 := s.UDPConn.Close()
if e1 != nil || e2 != nil {
return fmt.Errorf("transport: tcp %w, udp %v", e1, e2)
}
return nil
}
func (s *sysTransport) LocalAddr() net.Addr {
return s.UDPConn.LocalAddr() // disambiguate *net.Dialer and net.udpConn
}
func System(address string) (Interface, error) {
tcp, err := reuse.Listen("tcp", address)
if err != nil {
return nil, err
}
pconn, err := reuse.ListenPacket("udp", tcp.Addr().String())
if err != nil {
tcp.Close()
return nil, err
}
if udp, ok := pconn.(*net.UDPConn); ok {
return &sysTransport{
Listener: tcp,
Dialer: new(net.Dialer),
UDPConn: udp,
}, nil
}
panic("transport: packet socket is not a UDP socket")
}