mirror of
https://github.com/SagerNet/sing-box.git
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112 lines
2.5 KiB
Go
112 lines
2.5 KiB
Go
//go:build with_quic
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package v2rayquic
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import (
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"context"
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"net"
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"sync"
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"github.com/sagernet/quic-go"
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"github.com/sagernet/quic-go/http3"
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"github.com/sagernet/sing-box/adapter"
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"github.com/sagernet/sing-box/common/tls"
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C "github.com/sagernet/sing-box/constant"
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"github.com/sagernet/sing-box/option"
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"github.com/sagernet/sing-quic"
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"github.com/sagernet/sing/common"
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"github.com/sagernet/sing/common/bufio"
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M "github.com/sagernet/sing/common/metadata"
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N "github.com/sagernet/sing/common/network"
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)
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var _ adapter.V2RayClientTransport = (*Client)(nil)
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type Client struct {
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ctx context.Context
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dialer N.Dialer
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serverAddr M.Socksaddr
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tlsConfig tls.Config
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quicConfig *quic.Config
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connAccess sync.Mutex
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conn quic.Connection
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rawConn net.Conn
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}
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func NewClient(ctx context.Context, dialer N.Dialer, serverAddr M.Socksaddr, options option.V2RayQUICOptions, tlsConfig tls.Config) (adapter.V2RayClientTransport, error) {
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quicConfig := &quic.Config{
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DisablePathMTUDiscovery: !C.IsLinux && !C.IsWindows,
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}
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if len(tlsConfig.NextProtos()) == 0 {
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tlsConfig.SetNextProtos([]string{http3.NextProtoH3})
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}
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return &Client{
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ctx: ctx,
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dialer: dialer,
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serverAddr: serverAddr,
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tlsConfig: tlsConfig,
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quicConfig: quicConfig,
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}, nil
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}
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func (c *Client) offer() (quic.Connection, error) {
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conn := c.conn
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if conn != nil && !common.Done(conn.Context()) {
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return conn, nil
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}
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c.connAccess.Lock()
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defer c.connAccess.Unlock()
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conn = c.conn
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if conn != nil && !common.Done(conn.Context()) {
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return conn, nil
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}
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conn, err := c.offerNew()
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if err != nil {
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return nil, err
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}
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return conn, nil
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}
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func (c *Client) offerNew() (quic.Connection, error) {
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udpConn, err := c.dialer.DialContext(c.ctx, "udp", c.serverAddr)
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if err != nil {
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return nil, err
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}
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var packetConn net.PacketConn
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packetConn = bufio.NewUnbindPacketConn(udpConn)
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quicConn, err := qtls.Dial(c.ctx, packetConn, udpConn.RemoteAddr(), c.tlsConfig, c.quicConfig)
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if err != nil {
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packetConn.Close()
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return nil, err
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}
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c.conn = quicConn
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c.rawConn = udpConn
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return quicConn, nil
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}
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func (c *Client) DialContext(ctx context.Context) (net.Conn, error) {
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conn, err := c.offer()
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if err != nil {
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return nil, err
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}
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stream, err := conn.OpenStream()
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if err != nil {
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return nil, err
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}
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return &StreamWrapper{Conn: conn, Stream: stream}, nil
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}
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func (c *Client) Close() error {
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c.connAccess.Lock()
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defer c.connAccess.Unlock()
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if c.conn != nil {
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c.conn.CloseWithError(0, "")
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}
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if c.rawConn != nil {
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c.rawConn.Close()
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}
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c.conn = nil
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c.rawConn = nil
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return nil
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}
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