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GENA (General Event Notification Architecture). RTLAB 이 남 지 2003/01/08. Agenda. What is GENA? Protocol Stack GENA HTTP Methods Event Sequence. What is GENA?. Send and receive notifications using HTTP over TCP/IP and administratively-scoped multicast UDP Main component

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Presentation Transcript
agenda
Agenda
  • What is GENA?
  • Protocol Stack
  • GENA HTTP Methods
  • Event Sequence
what is gena
What is GENA?
  • Send and receive notifications using HTTP over TCP/IP and administratively-scoped multicast UDP
  • Main component
    • Publisher and Subscriber
protocol stack

UPnP vendor

HTTP

GENA

UPnP vendor

HTTPMU (multicast)

GENA

SSDP

UPnP Forum

UPnP Forum

UPnP Device Architecture

UPnP Device Architecture

TCP

HTTPMU (multicast)

IP

UDP

IP

Protocol Stack

Discovery

Event

gena http methods
GENA HTTP Methods
  • SUBSCRIBE to notification
  • UNSUBSCRIBE
  • NOTIFY
    • Of device availability (discovery)
    • Of state variable changes
event sequence subscribe

SUBSCRIBE /upnp/event/tvpicture1 HTTP/1.1

HOST: 155.230.14.177:5431

CALLBACK: <http://155.230.14.177:5432/>

NT: upnp:event

TIMEOUT: Second-1800

Root device

Service

(publisher)

Subscription request

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

Event Sequence -SUBSCRIBE

C.P.

(subscriber)

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

<e:propertyset xmlns:e="urn:schemas-upnp-org:event-1-0">

<e:property>

<Power>0</Power>

</e:property>

<e:property>

<Channel>1</Channel>

</e:property>

<e:property>

<Volume>5</Volume>

</e:property>

</e:propertyset>

Root device

C.P.

(subscriber)

Service

(publisher)

Event message

response

HTTP/1.1 200 OK

Event Sequence -NOTIFY
event sequence renewing subscription

Root device

SUBSCRIBEpublisher path HTTP/1.1HOST: publisher host:publisher portSID: uuid:subscription UUIDTIMEOUT: Second-requested subscription duration

C.P.

(subscriber)

Service

(publisher)

Renewal request(uuid:…)

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

Event Sequence –Renewing Subscription
event sequence unsubscribe

Root device

C.P.

(subscriber)

UNSUBSCRIBE /upnp/event/tvcontrol1 HTTP/1.1

HOST: 155.230.14.177:5431

SID: uuid:b4bec083-386b-41f4-9659-2ccfb8b75ac5

Service

(publisher)

Unsubscription request

Unsubscription(uuid:…)

HTTP/1.1 200 OK

Event Sequence -UNSUBSCRIBE
slide10

NT

  • USN *
  • 1
  • root device UUID
  • root device UUID
  • 2
  • device type : device version
  • root device UUID and :: and device type : device version
  • 3
  • upnp:rootdevice
  • root device UUID and :: and upnp:rootdevice

Root Device

  • NT
  • USN *
  • 1
  • embedded device UUID
  • embedded device UUID

service

Device

  • 2
  • device type : device version
  • embedded device UUID and :: and device type : device version

Device

Service

  • NT
  • USN *
  • 1
  • service type : service version
  • enclosing device UUID and :: and service type : service version
  • Three discovery messages for the root device.
  • Two discovery messages for each embedded device.
  • Once for each service.
advertisement device alive
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