SSL Explorer also comes with extensions that support many commercial desktop environments such as the Citrix ICA client extension for those who have Citrix servers. There will three steps to setting up the TightVNC example: Upload the custom TightVNC extension to the SSL Explorer install via the "Extension Manager". Extensions are packaged zipfiles that include specialized XML that tells the SSL Explorer Java VPN client what to do in order to utilize a specific service. Figure 8: Extension Store screen (click image to enlarge) In the upper right hand corner of the screen in Figure 8, we want to select the Upload Extension link. Figure 9: Extension upload screen (click image to enlarge) Select the Browse button to select the location of the downloaded TightVNC extension on your local PC. Then select the Upload button to load the extension into the SSL Explorer installation. ...

For the time being we just want to add a temporary extension as a way to record our welcome message. You can do this via: cp extensions.conf extensions.conf.bak Now you can open the file for editing nano extensions.conf At the end of the file, create an extension by adding these three lines: exten => 1205,1,Wait(2) exten => 1205,2,Record(/tmp/asterisk-recording:gsm) exten => 1205,3,Hangup Now reload Asterisk (since you changed a configuration file, remember?) ... Once the demo starts to explain the available extensions, dial 1205 to trigger your new extension. So I added a semi-colon in front of every line down to: ; Give voicemail at extension 8500 Optionally, you may also want to remove or comment out the 1205 extension we added earlier at the end of the file. You can call in and check your messages by entering extension 8500 during the initial greeting....

The debate has carried over into OpenGL, where up to now the attempts at bringing programmability into the API have happened through the extensions procedure. This has contributed to the bewildering number of extensions, and the same issues of hardware-centricity were emerging and subsequently complicated by IP issues. Nvidia's extension documentation is 500+ pages, while the OpenGL 1.3 specification itself is only 284 pages.) So, OpenGL faces a number of critical issues. OpenGL does not provide hardware independent access to the new programmable processors, so the current direction is to expose multiple hardware architectures through vendor-specific extensions. However, IP (intellectual property) threats have been holding up broader adoption of these extensions....