167 lines
4.4 KiB
Go
167 lines
4.4 KiB
Go
// grpc over quic mostly based on https://github.com/sssgun/grpc-quic
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// copyright sssgun with MIT license
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package grpcquic
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import (
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"context"
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"crypto/tls"
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"net"
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"time"
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quic "github.com/quic-go/quic-go"
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)
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///////////////////////////////////////////////////////////////////////////////
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// Connection
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var _ net.Conn = (*Conn)(nil)
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type Conn struct {
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conn quic.Connection
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stream quic.Stream
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}
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func NewConn(conn quic.Connection) (net.Conn, error) {
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stream, err := conn.OpenStreamSync(context.Background())
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if err != nil {
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return nil, err
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}
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return &Conn{conn, stream}, nil
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}
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// Read reads data from the connection.
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// Read 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 SetReadDeadline.
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func (c *Conn) Read(b []byte) (n int, err error) {
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return c.stream.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 (c *Conn) Write(b []byte) (n int, err error) {
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return c.stream.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 (c *Conn) Close() error {
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// @TODO: log this
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c.stream.Close()
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return c.conn.CloseWithError(0, "")
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}
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// LocalAddr returns the local network address.
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func (c *Conn) LocalAddr() net.Addr {
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return c.conn.LocalAddr()
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}
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// RemoteAddr returns the remote network address.
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func (c *Conn) RemoteAddr() net.Addr {
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return c.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 (c *Conn) SetDeadline(t time.Time) error {
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return c.stream.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 (c *Conn) SetReadDeadline(t time.Time) error {
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return c.stream.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 (c *Conn) SetWriteDeadline(t time.Time) error {
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return c.stream.SetWriteDeadline(t)
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}
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///////////////////////////////////////////////////////////////////////////////
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// Listener
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var _ net.Listener = (*Listener)(nil)
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type Listener struct {
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ql quic.Listener
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}
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func Listen(ql quic.Listener) net.Listener {
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return &Listener{ql}
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}
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// Accept waits for and returns the next connection to the listener.
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func (l *Listener) Accept() (net.Conn, error) {
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sess, err := l.ql.Accept(context.Background())
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if err != nil {
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return nil, err
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}
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stream, err := sess.AcceptStream(context.Background())
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if err != nil {
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return nil, err
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}
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return &Conn{sess, stream}, nil
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}
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// Close closes the listener.
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// Any blocked Accept operations will be unblocked and return errors.
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func (l *Listener) Close() error {
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return l.ql.Close()
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}
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// Addr returns the listener's network address.
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func (l *Listener) Addr() net.Addr {
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return l.ql.Addr()
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}
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///////////////////////////////////////////////////////////////////////////////
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// Dialer
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var QuicConfig = &quic.Config{
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KeepAlivePeriod: 10 * time.Second,
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}
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func NewPacketConn(addr string) (net.PacketConn, error) {
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// create a packet conn for outgoing connections
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udpAddr, err := net.ResolveUDPAddr("udp", addr)
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if err != nil {
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return nil, err
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}
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return net.ListenUDP("udp", udpAddr)
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}
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func NewQuicDialer(tlsConf *tls.Config) func(context.Context, string) (net.Conn, error) {
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return func(ctx context.Context, target string) (net.Conn, error) {
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sess, err := quic.DialAddr(ctx, target, tlsConf, QuicConfig)
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if err != nil {
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return nil, err
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}
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return NewConn(sess)
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}
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}
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