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@ -34,6 +34,7 @@ import (
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"tailscale.com/logtail"
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"tailscale.com/net/dns"
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"tailscale.com/net/netns"
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"tailscale.com/net/proxymux"
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"tailscale.com/net/socks5/tssocks"
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"tailscale.com/net/tstun"
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"tailscale.com/paths"
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@ -302,8 +303,7 @@ func run() error {
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}
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pol.Logtail.SetLinkMonitor(linkMon)
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socksListener := mustStartTCPListener("SOCKS5", args.socksAddr)
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httpProxyListener := mustStartTCPListener("HTTP proxy", args.httpProxyAddr)
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socksListener, httpProxyListener := mustStartProxyListeners(args.socksAddr, args.httpProxyAddr)
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e, useNetstack, err := createEngine(logf, linkMon)
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if err != nil {
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@ -516,18 +516,46 @@ func newNetstack(logf logger.Logf, e wgengine.Engine) (*netstack.Impl, error) {
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return netstack.Create(logf, tunDev, e, magicConn)
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}
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func mustStartTCPListener(name, addr string) net.Listener {
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if addr == "" {
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return nil
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// mustStartProxyListeners creates listeners for local SOCKS and HTTP
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// proxies, if the respective addresses are not empty. socksAddr and
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// httpAddr can be the same, in which case socksListener will receive
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// connections that look like they're speaking SOCKS and httpListener
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// will receive everything else.
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//
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// socksListener and httpListener can be nil, if their respective
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// addrs are empty.
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func mustStartProxyListeners(socksAddr, httpAddr string) (socksListener, httpListener net.Listener) {
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if socksAddr == httpAddr && socksAddr != "" && !strings.HasSuffix(socksAddr, ":0") {
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ln, err := net.Listen("tcp", socksAddr)
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if err != nil {
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log.Fatalf("proxy listener: %v", err)
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}
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return proxymux.SplitSOCKSAndHTTP(ln)
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}
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var err error
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if socksAddr != "" {
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socksListener, err = net.Listen("tcp", socksAddr)
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if err != nil {
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log.Fatalf("SOCKS5 listener: %v", err)
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}
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if strings.HasSuffix(socksAddr, ":0") {
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// Log kernel-selected port number so integration tests
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// can find it portably.
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log.Printf("SOCKS5 listening on %v", socksListener.Addr())
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}
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ln, err := net.Listen("tcp", addr)
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}
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if httpAddr != "" {
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httpListener, err = net.Listen("tcp", httpAddr)
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if err != nil {
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log.Fatalf("%v listener: %v", name, err)
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log.Fatalf("HTTP proxy listener: %v", err)
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}
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if strings.HasSuffix(addr, ":0") {
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if strings.HasSuffix(httpAddr, ":0") {
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// Log kernel-selected port number so integration tests
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// can find it portably.
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log.Printf("%v listening on %v", name, ln.Addr())
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log.Printf("HTTP proxy listening on %v", httpListener.Addr())
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}
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}
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return ln
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return socksListener, httpListener
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}
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David Anderson
3 years ago
committed by