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net/tshttpproxy: don't proxy through ourselves

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When running a SOCKS or HTTP proxy, configure the tshttpproxy package to
drop those addresses from any HTTP_PROXY or HTTPS_PROXY environment
variables.

Fixes #7407

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: I6cd7cad7a609c639780484bad521c7514841764b
This commit is contained in:
Andrew Dunham
2023-03-04 21:49:05 -05:00
parent 62a1e9a44f
commit 38e4d303a2
5 changed files with 207 additions and 4 deletions
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5
cmd/tailscaled/tailscaled.go
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@@ -43,6 +43,7 @@ import (
"tailscale.com/net/proxymux"
"tailscale.com/net/socks5"
"tailscale.com/net/tsdial"
"tailscale.com/net/tshttpproxy"
"tailscale.com/net/tstun"
"tailscale.com/paths"
"tailscale.com/safesocket"
@@ -494,11 +495,13 @@ func getLocalBackend(ctx context.Context, logf logger.Logf, logID logid.PublicID
}
}
if socksListener != nil || httpProxyListener != nil {
var addrs []string
if httpProxyListener != nil {
hs := &http.Server{Handler: httpProxyHandler(dialer.UserDial)}
go func() {
log.Fatalf("HTTP proxy exited: %v", hs.Serve(httpProxyListener))
}()
addrs = append(addrs, httpProxyListener.Addr().String())
}
if socksListener != nil {
ss := &socks5.Server{
@@ -508,7 +511,9 @@ func getLocalBackend(ctx context.Context, logf logger.Logf, logID logid.PublicID
go func() {
log.Fatalf("SOCKS5 server exited: %v", ss.Serve(socksListener))
}()
addrs = append(addrs, socksListener.Addr().String())
}
tshttpproxy.SetSelfProxy(addrs...)
}
e = wgengine.NewWatchdog(e)