150 lines
3.1 KiB
Go
150 lines
3.1 KiB
Go
package quic
|
|
|
|
import (
|
|
"context"
|
|
"math"
|
|
"math/rand"
|
|
"net"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/go-gost/core/dialer"
|
|
"github.com/go-gost/core/logger"
|
|
md "github.com/go-gost/core/metadata"
|
|
icmp_pkg "github.com/go-gost/x/internal/util/icmp"
|
|
"github.com/go-gost/x/registry"
|
|
"github.com/quic-go/quic-go"
|
|
"golang.org/x/net/icmp"
|
|
)
|
|
|
|
func init() {
|
|
registry.DialerRegistry().Register("icmp", NewDialer)
|
|
registry.DialerRegistry().Register("icmp6", NewDialer6)
|
|
}
|
|
|
|
type icmpDialer struct {
|
|
ip6 bool
|
|
sessions map[string]*quicSession
|
|
sessionMutex sync.Mutex
|
|
logger logger.Logger
|
|
md metadata
|
|
options dialer.Options
|
|
}
|
|
|
|
func NewDialer(opts ...dialer.Option) dialer.Dialer {
|
|
options := dialer.Options{}
|
|
for _, opt := range opts {
|
|
opt(&options)
|
|
}
|
|
|
|
return &icmpDialer{
|
|
sessions: make(map[string]*quicSession),
|
|
logger: options.Logger,
|
|
options: options,
|
|
}
|
|
}
|
|
|
|
func NewDialer6(opts ...dialer.Option) dialer.Dialer {
|
|
options := dialer.Options{}
|
|
for _, opt := range opts {
|
|
opt(&options)
|
|
}
|
|
|
|
return &icmpDialer{
|
|
ip6: true,
|
|
sessions: make(map[string]*quicSession),
|
|
logger: options.Logger,
|
|
options: options,
|
|
}
|
|
}
|
|
func (d *icmpDialer) Init(md md.Metadata) (err error) {
|
|
if err = d.parseMetadata(md); err != nil {
|
|
return
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (d *icmpDialer) Dial(ctx context.Context, addr string, opts ...dialer.DialOption) (conn net.Conn, err error) {
|
|
if _, _, err := net.SplitHostPort(addr); err != nil {
|
|
addr = net.JoinHostPort(addr, "0")
|
|
}
|
|
|
|
raddr, err := net.ResolveUDPAddr("udp", addr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
d.sessionMutex.Lock()
|
|
defer d.sessionMutex.Unlock()
|
|
|
|
session, ok := d.sessions[addr]
|
|
if !ok {
|
|
options := &dialer.DialOptions{}
|
|
for _, opt := range opts {
|
|
opt(options)
|
|
}
|
|
|
|
var pc net.PacketConn
|
|
if d.ip6 {
|
|
pc, err = icmp.ListenPacket("ip6:ipv6-icmp", "")
|
|
} else {
|
|
pc, err = icmp.ListenPacket("ip4:icmp", "")
|
|
}
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
id := raddr.Port
|
|
if id == 0 {
|
|
id = rand.New(rand.NewSource(time.Now().UnixNano())).Intn(math.MaxUint16) + 1
|
|
raddr.Port = id
|
|
}
|
|
pc = icmp_pkg.ClientConn(d.ip6, pc, id)
|
|
|
|
session, err = d.initSession(ctx, raddr, pc)
|
|
if err != nil {
|
|
d.logger.Error(err)
|
|
pc.Close()
|
|
return nil, err
|
|
}
|
|
|
|
d.sessions[addr] = session
|
|
}
|
|
|
|
conn, err = session.GetConn()
|
|
if err != nil {
|
|
session.Close()
|
|
delete(d.sessions, addr)
|
|
return nil, err
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func (d *icmpDialer) initSession(ctx context.Context, addr net.Addr, conn net.PacketConn) (*quicSession, error) {
|
|
quicConfig := &quic.Config{
|
|
KeepAlivePeriod: d.md.keepAlivePeriod,
|
|
HandshakeIdleTimeout: d.md.handshakeTimeout,
|
|
MaxIdleTimeout: d.md.maxIdleTimeout,
|
|
Versions: []quic.VersionNumber{
|
|
quic.Version1,
|
|
quic.Version2,
|
|
},
|
|
}
|
|
|
|
tlsCfg := d.options.TLSConfig
|
|
tlsCfg.NextProtos = []string{"h3", "quic/v1"}
|
|
|
|
session, err := quic.DialEarly(ctx, conn, addr, tlsCfg, quicConfig)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &quicSession{session: session}, nil
|
|
}
|
|
|
|
// Multiplex implements dialer.Multiplexer interface.
|
|
func (d *icmpDialer) Multiplex() bool {
|
|
return true
|
|
}
|