mirror of
https://github.com/refraction-networking/uquic.git
synced 2025-04-04 20:57:36 +03:00
104 lines
3.3 KiB
Go
104 lines
3.3 KiB
Go
package quic
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import (
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"context"
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"crypto/tls"
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"errors"
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"net"
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"github.com/quic-go/quic-go/internal/protocol"
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)
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// make it possible to mock connection ID for initial generation in the tests
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var generateConnectionIDForInitial = protocol.GenerateConnectionIDForInitial
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// DialAddr establishes a new QUIC connection to a server.
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// It resolves the address, and then creates a new UDP connection to dial the QUIC server.
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// When the QUIC connection is closed, this UDP connection is closed.
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// See Dial for more details.
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func DialAddr(ctx context.Context, addr string, tlsConf *tls.Config, conf *Config) (Connection, error) {
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udpConn, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4zero, Port: 0})
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if err != nil {
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return nil, err
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}
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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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tr, err := setupTransport(udpConn, tlsConf, true)
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if err != nil {
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return nil, err
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}
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return tr.dial(ctx, udpAddr, addr, tlsConf, conf, false)
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}
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// DialAddrEarly establishes a new 0-RTT QUIC connection to a server.
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// See DialAddr for more details.
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func DialAddrEarly(ctx context.Context, addr string, tlsConf *tls.Config, conf *Config) (EarlyConnection, error) {
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udpConn, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4zero, Port: 0})
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if err != nil {
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return nil, err
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}
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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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tr, err := setupTransport(udpConn, tlsConf, true)
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if err != nil {
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return nil, err
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}
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conn, err := tr.dial(ctx, udpAddr, addr, tlsConf, conf, true)
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if err != nil {
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tr.Close()
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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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// DialEarly establishes a new 0-RTT QUIC connection to a server using a net.PacketConn.
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// See Dial for more details.
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func DialEarly(ctx context.Context, c net.PacketConn, addr net.Addr, tlsConf *tls.Config, conf *Config) (EarlyConnection, error) {
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dl, err := setupTransport(c, tlsConf, false)
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if err != nil {
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return nil, err
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}
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conn, err := dl.DialEarly(ctx, addr, tlsConf, conf)
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if err != nil {
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dl.Close()
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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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// Dial establishes a new QUIC connection to a server using a net.PacketConn.
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// If the PacketConn satisfies the OOBCapablePacketConn interface (as a net.UDPConn does),
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// ECN and packet info support will be enabled. In this case, ReadMsgUDP and WriteMsgUDP
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// will be used instead of ReadFrom and WriteTo to read/write packets.
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// The tls.Config must define an application protocol (using NextProtos).
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//
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// This is a convenience function. More advanced use cases should instantiate a Transport,
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// which offers configuration options for a more fine-grained control of the connection establishment,
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// including reusing the underlying UDP socket for multiple QUIC connections.
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func Dial(ctx context.Context, c net.PacketConn, addr net.Addr, tlsConf *tls.Config, conf *Config) (Connection, error) {
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dl, err := setupTransport(c, tlsConf, false)
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if err != nil {
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return nil, err
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}
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conn, err := dl.Dial(ctx, addr, tlsConf, conf)
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if err != nil {
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dl.Close()
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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 setupTransport(c net.PacketConn, tlsConf *tls.Config, createdPacketConn bool) (*Transport, error) {
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if tlsConf == nil {
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return nil, errors.New("quic: tls.Config not set")
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}
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return &Transport{
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Conn: c,
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createdConn: createdPacketConn,
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isSingleUse: true,
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}, nil
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}
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