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feat(stream): UPnP-map the HTTPS port for remote direct-TLS (best-effort)

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UPnP previously published only the HTTP stream port (11818). The remote
per-agent direct-TLS path (https://<pubip>.<hash>.agent.unarr.app:<port>)
needs the HTTPS port (11819) reachable from the WAN, so map it too —
inside listenTLS after the actual bound port is known, so the router and
the web (which encodes the reported httpsPort) agree.

Best-effort: if UPnP/NAT-PMP isn't available the remote path just falls
back to the CloudFlare funnel; the LAN direct path is unaffected. Opt-in
via downloads.enable_upnp (unchanged default: false).
This commit is contained in:
Deivid Soto 2026-06-10 22:56:07 +02:00
parent 3fcfaaf234
commit e4170af604
1 changed files with 22 additions and 5 deletions
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27
internal/engine/stream_server.go
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@ -67,11 +67,12 @@ type StreamServer struct {
growing GrowingSource // set instead of provider for the progressive-remux path (3b)
taskID string // current task being streamed
server *http.Server
port int
url string // best single URL (backward compat)
urls StreamURLs // all available URLs by network type
upnpMapping *UPnPMapping
server *http.Server
port int
url string // best single URL (backward compat)
urls StreamURLs // all available URLs by network type
upnpMapping *UPnPMapping
httpsUpnpMapping *UPnPMapping // WAN mapping for the direct-TLS HTTPS port
// TLS — optional HTTPS listener for direct, valid-cert browser playback
// (agent-TLS feature). httpsPort 0 = disabled. tlsCert holds the current
@ -461,6 +462,21 @@ func (ss *StreamServer) listenTLS(ctx context.Context, mux http.Handler) error {
}
ss.httpsPort = listener.Addr().(*net.TCPAddr).Port
// Best-effort: publish the HTTPS port to the WAN so a remote browser can hit
// the per-agent direct-TLS host (https://<pubip>.<hash>.agent.unarr.app:<port>)
// without a manual port-forward. Mapped here — after the actual bound port is
// known — so the web (which encodes the reported httpsPort) and the router
// agree. If UPnP/NAT-PMP isn't available the remote path just falls back to
// the CloudFlare funnel; the LAN direct path is unaffected.
if ss.enableUPnP {
if m, err := SetupUPnP(ss.httpsPort); err != nil {
log.Printf("[stream] HTTPS UPnP failed: %v (remote direct-TLS falls back to the funnel)", err)
} else {
ss.httpsUpnpMapping = m
log.Printf("[stream] HTTPS UPnP: published port %d to WAN via %s:%d", ss.httpsPort, m.ExternalIP, m.ExternalPort)
}
}
tlsCfg := &tls.Config{
MinVersion: tls.VersionTLS12,
NextProtos: []string{"h2", "http/1.1"},
@ -634,6 +650,7 @@ func (ss *StreamServer) IdleSince() time.Duration {
// Call only at daemon shutdown — NOT between file swaps.
func (ss *StreamServer) Shutdown(ctx context.Context) error {
ss.upnpMapping.Remove()
ss.httpsUpnpMapping.Remove()
if ss.hls != nil {
ss.hls.CloseAll()
}