1. GENA (General Event Notification Architecture) RTLAB 이 남 지 2003/01/08

2. Agenda  What is GENA?  Protocol Stack  GENA HTTP Methods  Event Sequence

3. What is GENA?  Send and receive notifications using HTTP over TCP/IP and administratively- scoped multicast UDP  Main component Publisher and Subscriber

4. Protocol Stack UPnP vendor UPnP Forum UPnP Device Architecture HTTP GENA TCP IP UPnP vendor UPnP Forum UPnP Device Architecture HTTPMU (multicast) GENASSDP HTTPMU (multicast) UDP IP DiscoveryEvent

5. GENA HTTP Methods  SUBSCRIBE to notification  UNSUBSCRIBE  NOTIFY Of device availability (discovery) Of state variable changes

6. Event Sequence - SUBSCRIBE Subscription request SUBSCRIBE /upnp/event/tvpicture1 HTTP/1.1 HOST: 155.230.14.177:5431 CALLBACK: NT: upnp:event TIMEOUT: Second-1800 Root device Service (publisher) C.P. (subscriber) Subscription(uuid:…) HTTP/1.1 200 OK DATE: Fri, 03 Jan 2003 01:04:59 GMT SERVER: Linux/2.4.18-3 UPnP/1.0 Intel UPnP SDK/1.0 SID: uuid:dafba47f-3159-4b23-8a52-b463e77a4454 TIMEOUT: Second-1800

7. Event Sequence - NOTIFY NOTIFY / HTTP/1.1 HOST: 155.230.14.177:5432 CONTENT-TYPE: text/xml CONTENT-LENGTH: 214 NT: upnp:event NTS: upnp:propchange SID: uuid:b4bec083-386b-41f4-9659-2ccfb8b75ac5 SEQ: 0 0 1 5 Event message HTTP/1.1 200 OK response Root device Service (publisher) C.P. (subscriber)

8. Event Sequence – Renewing Subscription Root device Service (publisher) C.P. (subscriber) Renewal request(uuid:…) SUBSCRIBE publisher path HTTP/1.1 HOST: publisher host:publisher port SID: uuid:subscription UUID TIMEOUT: Second-requested subscription duration Subscription(uuid:…) HTTP/1.1 200 OK DATE: Fri, 03 Jan 2003 01:04:59 GMT SERVER: Linux/2.4.18-3 UPnP/1.0 Intel UPnP SDK/1.0 SID: uuid:dafba47f-3159-4b23-8a52-b463e77a4454 TIMEOUT: Second-1800

9. Event Sequence - UNSUBSCRIBE Root device Service (publisher) C.P. (subscriber) Unsubscription request UNSUBSCRIBE /upnp/event/tvcontrol1 HTTP/1.1 HOST: 155.230.14.177:5431 SID: uuid:b4bec083-386b-41f4-9659-2ccfb8b75ac5 Unsubscription(uuid:…) HTTP/1.1 200 OK

10. Root Device serviceDevice Service NTUSN * 1root device UUID 2 device type : device version root device UUID and :: and device type : device version 3upnp:rootdevice root device UUID and :: and upnp:rootdevice Two discovery messages for each embedded device. NTUSN * 1 embedded device UUID 2 device type : device version embedded device UUID and :: and device type : device version Once for each service. NTUSN * 1 service type : service version enclosing device UUID and :: and service type : service version Three discovery messages for the root device.

11. Advertisement device - alive NOTIFY * HTTP/1.1 HOST: 239.255.255.250:1900 CACHE-CONTROL: max-age=1800 LOCATION: http://155.230.14.177:5431/tvdevicedesc.xml NT: upnp:rootdevice NTS: ssdp:alive SERVER: Linux/2.4.18-3 UPnP/1.0 Intel UPnP SDK/1.0 USN: uuid:Upnp-TVEmulator-1_0-1234567890001::upnp:rootdevice NOTIFY * HTTP/1.1 HOST: 239.255.255.250:1900 CACHE-CONTROL: max-age=1800 LOCATION: http://155.230.14.177:5431/tvdevicedesc.xml NT: uuid:Upnp-TVEmulator-1_0-1234567890001 NTS: ssdp:alive SERVER: Linux/2.4.18-3 UPnP/1.0 Intel UPnP SDK/1.0 USN: uuid:Upnp-TVEmulator-1_0-1234567890001 NOTIFY * HTTP/1.1 HOST: 239.255.255.250:1900 CACHE-CONTROL: max-age=1800 LOCATION: http://155.230.14.177:5431/tvdevicedesc.xml NT: urn:schemas-upnp-org:device:tvdevice:1 NTS: ssdp:alive SERVER: Linux/2.4.18-3 UPnP/1.0 Intel UPnP SDK/1.0 USN: uuid:Upnp-TVEmulator-1_0-1234567890001::urn:schemas-upnp-org:device:tvdevice:1