75 lines
1.6 KiB
Go
75 lines
1.6 KiB
Go
package dtls
|
|
|
|
import (
|
|
"context"
|
|
"crypto/tls"
|
|
"net"
|
|
|
|
"github.com/go-gost/core/dialer"
|
|
"github.com/go-gost/core/logger"
|
|
md "github.com/go-gost/core/metadata"
|
|
xdtls "github.com/go-gost/x/internal/util/dtls"
|
|
"github.com/go-gost/x/registry"
|
|
"github.com/pion/dtls/v2"
|
|
)
|
|
|
|
func init() {
|
|
registry.DialerRegistry().Register("dtls", NewDialer)
|
|
}
|
|
|
|
type dtlsDialer struct {
|
|
md metadata
|
|
logger logger.Logger
|
|
options dialer.Options
|
|
}
|
|
|
|
func NewDialer(opts ...dialer.Option) dialer.Dialer {
|
|
options := dialer.Options{}
|
|
for _, opt := range opts {
|
|
opt(&options)
|
|
}
|
|
|
|
return &dtlsDialer{
|
|
logger: options.Logger,
|
|
options: options,
|
|
}
|
|
}
|
|
|
|
func (d *dtlsDialer) Init(md md.Metadata) (err error) {
|
|
return d.parseMetadata(md)
|
|
}
|
|
|
|
func (d *dtlsDialer) Dial(ctx context.Context, addr string, opts ...dialer.DialOption) (net.Conn, error) {
|
|
var options dialer.DialOptions
|
|
for _, opt := range opts {
|
|
opt(&options)
|
|
}
|
|
|
|
conn, err := options.NetDialer.Dial(ctx, "udp", addr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
tlsCfg := d.options.TLSConfig
|
|
if tlsCfg == nil {
|
|
tlsCfg = &tls.Config{
|
|
InsecureSkipVerify: true,
|
|
}
|
|
}
|
|
config := dtls.Config{
|
|
Certificates: tlsCfg.Certificates,
|
|
InsecureSkipVerify: tlsCfg.InsecureSkipVerify,
|
|
ExtendedMasterSecret: dtls.RequireExtendedMasterSecret,
|
|
ServerName: tlsCfg.ServerName,
|
|
RootCAs: tlsCfg.RootCAs,
|
|
FlightInterval: d.md.flightInterval,
|
|
MTU: d.md.mtu,
|
|
}
|
|
|
|
c, err := dtls.ClientWithContext(ctx, conn, &config)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return xdtls.Conn(c, d.md.bufferSize), nil
|
|
}
|