[Dev] Which Com are used to implement services required by WebAPI. - MessagePort

Amarnath Valluri amarnath.valluri at linux.intel.com
Thu May 15 08:19:16 GMT 2014

On 05/15/2014 10:27 AM, Patrick Ohly wrote:
> On Thu, 2014-05-15 at 10:09 +0300, Amarnath Valluri wrote:
>> Hi Domining,
>> MessagePort WebAPI on Tizen IVI is not using '
>> platform/core/appfw/message-port', instead it uses :
>> platfrom/ivi/message-port, which is peer-to-peer DBus based
>> implementation.
> Out of curiosity, and because it is relevant for the security
> discussion: can you describe the data flow from Web App through
> Crosswalk to a native app listening on a message port? In particular,
> which Crosswalk process is contacting the native side, which Smack label
> does it have, and where is D-Bus involved in this?
The backend messageport daemon works just as a proxy between two 
All Tizen applications which required to exchange data via MessagePort 
will open a connection with the daemon.
It treats both Native and Web applications same.

In crosswalk the xwalk extension process requests(via peer-to-peer dbus 
socket) the 'messageportd'
on behalf of web app to send message-data to peer(running) application. 
Then the messageport daemon
finds the right 'client' based on the requested 'app-id', and signals 
the app with the message data.

Messageport daemon using 'User' Smack label.

- Amarnath

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