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listener.go
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/
listener.go
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package rtcp
import (
"context"
"net"
"github.com/go-gost/core/chain"
"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"
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"
xnet "github.com/gost-dev/x/extra/net"
)
func init() {
registry.ListenerRegistry().Register("rtcp", NewListener)
}
type rtcpListener struct {
laddr net.Addr
ln net.Listener
router *chain.Router
logger logger.Logger
closed chan struct{}
options listener.Options
}
func NewListener(opts ...listener.Option) listener.Listener {
options := listener.Options{}
for _, opt := range opts {
opt(&options)
}
return &rtcpListener{
closed: make(chan struct{}),
logger: options.Logger,
options: options,
}
}
func (l *rtcpListener) Init(md md.Metadata) (err error) {
if err = l.parseMetadata(md); err != nil {
return
}
network := "tcp"
if xnet.IsIPv4(l.options.Addr) {
network = "tcp4"
}
laddr, err := net.ResolveTCPAddr(network, l.options.Addr)
if err != nil {
return
}
l.laddr = laddr
l.router = chain.NewRouter(
chain.ChainRouterOption(l.options.Chain),
chain.LoggerRouterOption(l.logger),
)
return
}
func (l *rtcpListener) Accept() (conn net.Conn, err error) {
select {
case <-l.closed:
return nil, net.ErrClosed
default:
}
if l.ln == nil {
l.ln, err = l.router.Bind(
context.Background(), "tcp", l.laddr.String(),
chain.MuxBindOption(true),
)
if err != nil {
return nil, listener.NewAcceptError(err)
}
l.ln = metrics.WrapListener(l.options.Service, l.ln)
l.ln = admission.WrapListener(l.options.Admission, l.ln)
l.ln = limiter.WrapListener(l.options.TrafficLimiter, l.ln)
l.ln = climiter.WrapListener(l.options.ConnLimiter, l.ln)
}
conn, err = l.ln.Accept()
if err != nil {
l.ln.Close()
l.ln = nil
return nil, listener.NewAcceptError(err)
}
return
}
func (l *rtcpListener) Addr() net.Addr {
return l.laddr
}
func (l *rtcpListener) Close() error {
select {
case <-l.closed:
default:
close(l.closed)
if l.ln != nil {
l.ln.Close()
// l.ln = nil
}
}
return nil
}