sing-box/inbound/default_tcp.go

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package inbound
import (
"context"
"net"
"net/netip"
"github.com/sagernet/sing-box/adapter"
"github.com/sagernet/sing-box/common/proxyproto"
"github.com/sagernet/sing-box/log"
E "github.com/sagernet/sing/common/exceptions"
M "github.com/sagernet/sing/common/metadata"
N "github.com/sagernet/sing/common/network"
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"github.com/sagernet/tfo-go"
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)
func (a *myInboundAdapter) ListenTCP() (net.Listener, error) {
var err error
bindAddr := M.SocksaddrFrom(netip.Addr(a.listenOptions.Listen), a.listenOptions.ListenPort)
var tcpListener net.Listener
if !a.listenOptions.TCPFastOpen {
tcpListener, err = net.ListenTCP(M.NetworkFromNetAddr(N.NetworkTCP, bindAddr.Addr), bindAddr.TCPAddr())
} else {
tcpListener, err = tfo.ListenTCP(M.NetworkFromNetAddr(N.NetworkTCP, bindAddr.Addr), bindAddr.TCPAddr())
}
if err == nil {
a.logger.Info("tcp server started at ", tcpListener.Addr())
}
if a.listenOptions.ProxyProtocol {
a.logger.Debug("proxy protocol enabled")
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tcpListener = &proxyproto.Listener{Listener: tcpListener, AcceptNoHeader: a.listenOptions.ProxyProtocolAcceptNoHeader}
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}
a.tcpListener = tcpListener
return tcpListener, err
}
func (a *myInboundAdapter) loopTCPIn() {
tcpListener := a.tcpListener
for {
conn, err := tcpListener.Accept()
if err != nil {
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if E.IsClosed(err) {
return
}
a.logger.Error("accept: ", err)
continue
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}
go a.injectTCP(conn, adapter.InboundContext{})
}
}
func (a *myInboundAdapter) injectTCP(conn net.Conn, metadata adapter.InboundContext) {
ctx := log.ContextWithNewID(a.ctx)
metadata = a.createMetadata(conn, metadata)
a.logger.InfoContext(ctx, "inbound connection from ", metadata.Source)
hErr := a.connHandler.NewConnection(ctx, conn, metadata)
if hErr != nil {
conn.Close()
a.NewError(ctx, E.Cause(hErr, "process connection from ", metadata.Source))
}
}
func (a *myInboundAdapter) routeTCP(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) {
a.logger.InfoContext(ctx, "inbound connection from ", metadata.Source)
hErr := a.newConnection(ctx, conn, metadata)
if hErr != nil {
conn.Close()
a.NewError(ctx, E.Cause(hErr, "process connection from ", metadata.Source))
}
}