mirror of
https://github.com/hbahadorzadeh/stunning.git
synced 2025-12-24 13:38:08 +08:00
112 lines
3.1 KiB
Go
112 lines
3.1 KiB
Go
package common
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import (
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"log"
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"net"
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"time"
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)
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type UdpConnection struct {
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net.Conn
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conn net.Conn
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addr [8]byte
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ch chan []byte
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closed bool
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}
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func GetUdpConnection(raddress string, laddr [8]byte, ch chan []byte) (UdpConnection, error) {
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u := UdpConnection{}
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u.addr = laddr
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u.ch = ch
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conn, err := net.Dial("udp", raddress)
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if err != nil {
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return u, err
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}
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u.conn = conn
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u.conn.SetReadDeadline(time.Now().Add(30 * time.Second))
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u.closed = false
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go u.Reader()
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return u, nil
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}
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func (u UdpConnection) Reader() {
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for {
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buff := make([]byte, 1024)
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n, err := u.conn.Read(buff)
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if err != nil {
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log.Fatal(err)
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}
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buff = append(append([]byte{}, u.addr[0], u.addr[1], u.addr[2], u.addr[3], u.addr[4], u.addr[5], u.addr[6], u.addr[7]), buff[:n]...)
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u.ch <- buff
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log.Printf("%v : %d bytes wrote to socket", u.addr, n)
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}
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u.conn.Close()
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u.closed = true
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}
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func (u UdpConnection) IsClosed() bool {
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return u.closed
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}
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func (u UdpConnection) Read(b []byte) (n int, err error) {
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return u.conn.Read(b)
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}
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// Write writes data to the connection.
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// Write can be made to time out and return an Error with Timeout() == true
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// after a fixed time limit; see SetDeadline and SetWriteDeadline.
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func (u UdpConnection) Write(b []byte) (n int, err error) {
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return u.conn.Write(b)
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}
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// Close closes the connection.
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// Any blocked Read or Write operations will be unblocked and return errors.
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func (u UdpConnection) Close() error {
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return u.conn.Close()
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}
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// LocalAddr returns the local network address.
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func (u UdpConnection) LocalAddr() net.Addr {
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return u.conn.LocalAddr()
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}
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// RemoteAddr returns the remote network address.
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func (u UdpConnection) RemoteAddr() net.Addr {
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return u.conn.RemoteAddr()
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}
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// SetDeadline sets the read and write deadlines associated
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// with the connection. It is equivalent to calling both
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// SetReadDeadline and SetWriteDeadline.
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//
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// A deadline is an absolute time after which I/O operations
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// fail with a timeout (see type Error) instead of
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// blocking. The deadline applies to all future and pending
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// I/O, not just the immediately following call to Read or
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// Write. After a deadline has been exceeded, the connection
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// can be refreshed by setting a deadline in the future.
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//
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// An idle timeout can be implemented by repeatedly extending
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// the deadline after successful Read or Write calls.
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//
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// A zero value for t means I/O operations will not time out.
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func (u UdpConnection) SetDeadline(t time.Time) error {
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return u.conn.SetDeadline(t)
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}
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// SetReadDeadline sets the deadline for future Read calls
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// and any currently-blocked Read call.
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// A zero value for t means Read will not time out.
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func (u UdpConnection) SetReadDeadline(t time.Time) error {
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return u.conn.SetReadDeadline(t)
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}
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// SetWriteDeadline sets the deadline for future Write calls
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// and any currently-blocked Write call.
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// Even if write times out, it may return n > 0, indicating that
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// some of the data was successfully written.
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// A zero value for t means Write will not time out.
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func (u UdpConnection) SetWriteDeadline(t time.Time) error {
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return u.conn.SetWriteDeadline(t)
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}
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