1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
package quic
import (
"context"
"crypto/tls"
"errors"
"net"
"github.com/quic-go/quic-go/internal/protocol"
)
// make it possible to mock connection ID for initial generation in the tests
var generateConnectionIDForInitial = protocol.GenerateConnectionIDForInitial
// DialAddr establishes a new QUIC connection to a server.
// It resolves the address, and then creates a new UDP connection to dial the QUIC server.
// When the QUIC connection is closed, this UDP connection is closed.
// See [Dial] for more details.
func DialAddr(ctx context.Context, addr string, tlsConf *tls.Config, conf *Config) (*Conn, error) {
udpConn, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4zero, Port: 0})
if err != nil {
return nil, err
}
udpAddr, err := net.ResolveUDPAddr("udp", addr)
if err != nil {
return nil, err
}
tr, err := setupTransport(udpConn, tlsConf, true)
if err != nil {
return nil, err
}
conn, err := tr.dial(ctx, udpAddr, addr, tlsConf, conf, false)
if err != nil {
tr.Close()
return nil, err
}
return conn, nil
}
// DialAddrEarly establishes a new 0-RTT QUIC connection to a server.
// See [DialAddr] for more details.
func DialAddrEarly(ctx context.Context, addr string, tlsConf *tls.Config, conf *Config) (*Conn, error) {
udpConn, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4zero, Port: 0})
if err != nil {
return nil, err
}
udpAddr, err := net.ResolveUDPAddr("udp", addr)
if err != nil {
return nil, err
}
tr, err := setupTransport(udpConn, tlsConf, true)
if err != nil {
return nil, err
}
conn, err := tr.dial(ctx, udpAddr, addr, tlsConf, conf, true)
if err != nil {
tr.Close()
return nil, err
}
return conn, nil
}
// DialEarly establishes a new 0-RTT QUIC connection to a server using a net.PacketConn.
// See [Dial] for more details.
func DialEarly(ctx context.Context, c net.PacketConn, addr net.Addr, tlsConf *tls.Config, conf *Config) (*Conn, error) {
dl, err := setupTransport(c, tlsConf, false)
if err != nil {
return nil, err
}
conn, err := dl.DialEarly(ctx, addr, tlsConf, conf)
if err != nil {
dl.Close()
return nil, err
}
return conn, nil
}
// Dial establishes a new QUIC connection to a server using a net.PacketConn.
// If the PacketConn satisfies the [OOBCapablePacketConn] interface (as a [net.UDPConn] does),
// ECN and packet info support will be enabled. In this case, ReadMsgUDP and WriteMsgUDP
// will be used instead of ReadFrom and WriteTo to read/write packets.
// The [tls.Config] must define an application protocol (using tls.Config.NextProtos).
//
// This is a convenience function. More advanced use cases should instantiate a [Transport],
// which offers configuration options for a more fine-grained control of the connection establishment,
// including reusing the underlying UDP socket for multiple QUIC connections.
func Dial(ctx context.Context, c net.PacketConn, addr net.Addr, tlsConf *tls.Config, conf *Config) (*Conn, error) {
dl, err := setupTransport(c, tlsConf, false)
if err != nil {
return nil, err
}
conn, err := dl.Dial(ctx, addr, tlsConf, conf)
if err != nil {
dl.Close()
return nil, err
}
return conn, nil
}
func setupTransport(c net.PacketConn, tlsConf *tls.Config, createdPacketConn bool) (*Transport, error) {
if tlsConf == nil {
return nil, errors.New("quic: tls.Config not set")
}
return &Transport{
Conn: c,
createdConn: createdPacketConn,
isSingleUse: true,
}, nil
}
|
