fix #94, boardcast ssdp notify to make bilibili oversea version upnp …

…discovery work

BilibiliLive/Module/DLNA/BiliBiliUpnpDMR.swift

@@ -20,6 +20,7 @@ class BiliBiliUpnpDMR: NSObject {
     @MainActor private var sessions = Set<NVASession>()
     private var started = false
     private var ip: String?
+    private var boardcastTimer: Timer?
 
     private lazy var serverInfo: String = {
         let file = Bundle.main.url(forResource: "DLNAInfo", withExtension: "xml")!
@@ -126,6 +127,8 @@ class BiliBiliUpnpDMR: NSObject {
     }
 
     func stop() {
+        boardcastTimer?.invalidate()
+        boardcastTimer = nil
         udp?.close()
         httpServer.stop()
         started = false
@@ -161,6 +164,13 @@ class BiliBiliUpnpDMR: NSObject {
                 Logger.warn("dmr start fail", err.localizedDescription)
             }
         }
+        boardcastTimer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true) {
+            [weak self] _ in
+            guard let self else { return }
+            if let data = getSSDPNotify().data(using: .utf8) {
+                udp.send(data, toHost: "239.255.255.250", port: 1900, withTimeout: 1, tag: 0)
+            }
+        }
     }
 
     private func getIPAddress() -> String? {
@@ -212,6 +222,25 @@ class BiliBiliUpnpDMR: NSObject {
         """
     }
 
+    private func getSSDPNotify() -> String {
+        guard let ip = ip ?? getIPAddress() else {
+            Logger.debug("no ip")
+            return ""
+        }
+        let text = """
+        NOTIFY * HTTP/1.1
+        Host: 239.255.255.250:1900
+        Location: http://\(ip):9958/description.xml
+        Cache-Control: max-age=30
+        Server: Linux/3.0.0, UPnP/1.0, Platinum/1.0.5.13
+        NTS: ssdp:alive
+        USN: uuid:\(bUuid)::urn:schemas-upnp-org:device:MediaRenderer:1
+        NT: urn:schemas-upnp-org:device:MediaRenderer:1
+
+        """
+        return text
+    }
+
     func handleEvent(frame: NVASession.NVAFrame, session: NVASession) {
         let topMost = UIViewController.topMostViewController()
         switch frame.action {