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listener.go
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/
listener.go
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package http
import (
"context"
"net"
"time"
"github.com/go-gost/core/listener"
"github.com/go-gost/core/logger"
md "github.com/go-gost/core/metadata"
admission "github.com/go-gost/x/admission/wrapper"
xnet "github.com/go-gost/x/internal/net"
"github.com/go-gost/x/internal/net/proxyproto"
climiter "github.com/go-gost/x/limiter/conn/wrapper"
limiter "github.com/go-gost/x/limiter/traffic/wrapper"
metrics "github.com/go-gost/x/metrics/wrapper"
"github.com/go-gost/x/registry"
stats "github.com/go-gost/x/stats/wrapper"
)
func init() {
registry.ListenerRegistry().Register("ohttp", NewListener)
}
type obfsListener struct {
net.Listener
logger logger.Logger
md metadata
options listener.Options
}
func NewListener(opts ...listener.Option) listener.Listener {
options := listener.Options{}
for _, opt := range opts {
opt(&options)
}
return &obfsListener{
logger: options.Logger,
options: options,
}
}
func (l *obfsListener) Init(md md.Metadata) (err error) {
if err = l.parseMetadata(md); err != nil {
return
}
network := "tcp"
if xnet.IsIPv4(l.options.Addr) {
network = "tcp4"
}
lc := net.ListenConfig{}
if l.md.mptcp {
lc.SetMultipathTCP(true)
l.logger.Debugf("mptcp enabled: %v", lc.MultipathTCP())
}
ln, err := lc.Listen(context.Background(), network, l.options.Addr)
if err != nil {
return
}
ln = proxyproto.WrapListener(l.options.ProxyProtocol, ln, 10*time.Second)
ln = metrics.WrapListener(l.options.Service, ln)
ln = stats.WrapListener(ln, l.options.Stats)
ln = admission.WrapListener(l.options.Admission, ln)
ln = limiter.WrapListener(l.options.TrafficLimiter, ln)
ln = climiter.WrapListener(l.options.ConnLimiter, ln)
l.Listener = ln
return
}
func (l *obfsListener) Accept() (net.Conn, error) {
c, err := l.Listener.Accept()
if err != nil {
return nil, err
}
return &obfsHTTPConn{
Conn: c,
header: l.md.header,
logger: l.logger,
}, nil
}