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udpsocket.go
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/
udpsocket.go
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package steam
import (
"errors"
"fmt"
"net"
"time"
)
type udpSocket struct {
conn net.Conn
}
func newUDPSocket(dial DialFn, addr string) (*udpSocket, error) {
conn, err := dial("udp", addr)
if err != nil {
return nil, err
}
return &udpSocket{conn}, nil
}
func (s *udpSocket) close() {
s.conn.Close()
}
func (s *udpSocket) send(payload []byte) error {
n, err := s.conn.Write(payload)
if err != nil {
return err
}
if n != len(payload) {
return fmt.Errorf("steam: could not send full udp request to %v", s.conn.RemoteAddr())
}
return nil
}
func (s *udpSocket) receivePacket() ([]byte, error) {
if err := s.conn.SetReadDeadline(time.Now().Add(1 * time.Second)); err != nil {
return nil, err
}
buf := make([]byte, 1500)
n, err := s.conn.Read(buf)
if err != nil {
return nil, err
}
return buf[:n], nil
}
func (s *udpSocket) receive() ([]byte, error) {
buf, err := s.receivePacket()
if err != nil {
return nil, err
}
if buf[0] == 0xFE {
return nil, errors.New("steam: cannot handle split packets")
}
return buf[4:], nil
}