// readFromSessionUDP acts just like net.UDPConn.ReadFrom(), but returns a session object instead of a
// net.UDPAddr.
func readFromSessionUDP(conn *net.UDPConn, b []byte) (int, *sessionUDP, error) {
oob := make([]byte, 40)
n, oobn, _, raddr, err := conn.ReadMsgUDP(b, oob)
if err != nil {
return n, nil, err
}
return n, &sessionUDP{raddr, oob[:oobn]}, err
}
func ReadUDPMsg(conn *net.UDPConn, payload []byte, oob []byte) (int, int, int, *net.UDPAddr, error) {
return conn.ReadMsgUDP(payload, oob)
}