a685e3fc98
Vndr has a simpler configuration and allows pointing to forked packages. Additionally other docker projects are now using vndr making vendoring in distribution more consistent. Updates letsencrypt to use fork. No longer uses sub-vendored packages. Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
// +build !windows,!plan9
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package dns
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import (
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"net"
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"syscall"
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)
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// SessionUDP holds the remote address and the associated
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// out-of-band data.
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type SessionUDP struct {
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raddr *net.UDPAddr
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context []byte
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}
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// RemoteAddr returns the remote network address.
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func (s *SessionUDP) RemoteAddr() net.Addr { return s.raddr }
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// setUDPSocketOptions sets the UDP socket options.
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// This function is implemented on a per platform basis. See udp_*.go for more details
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func setUDPSocketOptions(conn *net.UDPConn) error {
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sa, err := getUDPSocketName(conn)
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if err != nil {
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return err
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}
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switch sa.(type) {
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case *syscall.SockaddrInet6:
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v6only, err := getUDPSocketOptions6Only(conn)
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if err != nil {
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return err
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}
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setUDPSocketOptions6(conn)
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if !v6only {
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setUDPSocketOptions4(conn)
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}
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case *syscall.SockaddrInet4:
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setUDPSocketOptions4(conn)
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}
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return nil
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}
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// ReadFromSessionUDP acts just like net.UDPConn.ReadFrom(), but returns a session object instead of a
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// net.UDPAddr.
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func ReadFromSessionUDP(conn *net.UDPConn, b []byte) (int, *SessionUDP, error) {
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oob := make([]byte, 40)
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n, oobn, _, raddr, err := conn.ReadMsgUDP(b, oob)
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if err != nil {
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return n, nil, err
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}
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return n, &SessionUDP{raddr, oob[:oobn]}, err
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}
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// WriteToSessionUDP acts just like net.UDPConn.WritetTo(), but uses a *SessionUDP instead of a net.Addr.
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func WriteToSessionUDP(conn *net.UDPConn, b []byte, session *SessionUDP) (int, error) {
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n, _, err := conn.WriteMsgUDP(b, session.context, session.raddr)
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return n, err
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}
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