Network Location Awareness Vision And Scenarios

1
Network Location Awareness Vision And Scenarios

• Tracey Yao
• Program ManagerWindows Wireless
  Networkingtraceyy _at_ microsoft.com
• Microsoft Corporation

2
Session Outline

• Introduction
• Scenarios
• Features
• Architecture
• Demo
• Resources
• QA

3
Introduction

• Windows users are becoming more mobile
  Applications must adapt to changing network
  environments
• The Windows Longhorn Network Location Awareness
  (NLA) service provides the latest network
  information
• Applications can query or register with NLA for
  network change indications

4
Scenarios Longhorn

• User Friendly Connections UXThe updated
  connections User Interface (UI) shows a user that
  they are connected to ABC Corpnet whenever any of
  the PCs interfaces are connected to ABCs
  corporate network
• Switch Default PrinterAs a user travels between
  home and office, their default printer is
  automatically switched
• Opportunistic Certificate UpdateThe digital
  identity management service opportunistically
  connects to the domain controller to refresh
  certificates that are about to expire
• Switch Firewall ProfileThe users firewall
  automatically applies the corporate profile when
  it is connected to a corporate network
• Reduced Boot TimeAt boot time, Group Policy
  attempts to connect to the domain controller to
  apply policy only when there is corporate
  network connectivity

5
Scenarios Opportunities

• Network Specific SettingsApplications can
  associate settings with a specific network
• Adapt to Bandwidth ChangesApplications can
  adjust their network usage based on available
  bandwidth and network latency
• Opportunistic Use of InternetApplications can
  check for internet capability before attempting
  to use resources on the internet
• Restrict Use of Corporate ApplicationsLine of
  business applications can restrict access or
  reduce functionality in the absence of corporate
  network connectivity

6
Planned Longhorn Features
7
Network Signature
48 bytes
Hop ID
Link ID
Network ID
8
Architecture
Firewall
RAS
ConnectionUX
App
App
App
Provided by
API Client
MS Core
Indicate network characteristics of choice
MS NLA Clients
NLA Service
ISV NLA Clients
React to network changes and collect network data
WirelessService
DNS
Directory Services
IPHelper
9
Simple Internet Aware App
demo

• Tracey Yao
• Windows

10
Demo

• This demonstration illustrates how network
  location awareness (NLA) detects changes in
  network connectivity
• We implement a simple internet aware application
  that uses NLA to display the network connectivity
  state
• We launch the application to show changes in
  network connectivity

11
Demo

• NLA Data
• NLA_TRI_STATE
• A NLA_TRI_STATE object can have a value of TRUE,
  FALSE, or UNKNOWN.
• NLA data with the NLA data type
  NLA_DATA_TYPE_INTERNET_CAPABILITY are
  NLA_TRI_STATE objects.
• NLA_QUERY_FILTER
• This is used to construct a NLA filter. Filters
  are used to specify the conditions that the NLA
  data must satisfy before an application is to be
  notified.

12
Demo

• NLA Data
• NLA_COMPLETION
• This represents the mechanism in which an
  application wants to be notified. NLA supports
  notification through
• Eventing
• Completion calls
• Overlapped structure
• Windows messages

13
Demo

• NLA Application Programming Interface (API)
  Functions
• NlaRegisterQueryThis function allows an
  application to register for notification with NLA
• NlaGetInternetCapabilityThis function allows an
  application to query for the internet capability
  of a given network
• NlaCloseQueryThis function closes the
  application session with NLA

14
Demo

• NLA API Supporting Functions
• NlaCreateTypeSetThis function creates a new type
  set to be used in constructing the set and filter
  for an NLA query
• NlaCreateFilterThis function creates a filter to
  be used in an NLA query
• NlaAddToTypeSetThis function adds an NLA data
  type to an existing type set
• NlaNotEqualThis function creates an NOT EQUALS
  expression to be used in an NLA filter
• NlaDeleteFilterThis function deletes an existing
  filter
• NlaDeleteTypeSetThis function deletes an
  existing type set

15
Demo
NLA Service
Application Process
Construct NLA Filter (hFilter)
Construct NLA type set (hTypeSet)
hQ ? NlaRegisterQuery(hFilter, hTypeSet)
Build application context
Receive WM_NLA notification bInternet?
NlaGetInternetCapability(hQ)
Sense network events (cable connected)
Local RPC channel
Update network state
Send network change notifications to applications
Receive WM_NLA notification bInternet?
NlaGetInternetCapability(hQ)
Network state is monitored continuously Notificati
ons are delivered to each existent application
session
Application is continuously updated on the
network state, based on its needs
Cleanup context and terminate application session
NlaCloseQuery(hQ)
t
t
NLA data acquisition process NLA ? Application
interaction
16
Simple Internet Aware App
demo

• Tracey Yao
• Windows

17
Call To Action

• Determine how NLA can improve your application
  experience
• Read the NLA whitepapers
• Familiarize yourself with the network data types
  and APIs your application needs
• Post comments and questions on our blog

18
NLA Specific Resources

• E-Mail nlafdbck _at_ microsoft.com
• Web Resources
• Whitepapers
• http//msdn.microsoft.com/library/default.asp?url
  /library/en-us/dnlong/html/lhnla.asp
• http//www.microsoft.com/whdc/system/platform/mobi
  lepc/NLA.mspx
• Blog http//blogs.msdn.com/nla/
• Related Sessions
• Track Networking
• Wireless Vision Windows Longhorn and Beyond

19
Community Resources

• Community Sites
• http//www.microsoft.com/communities/default.mspx
  
• List of Newsgroups
• http//communities2.microsoft.com/communities/news
  groups/en-us/default.aspx
• Attend a free chat or Webcast
• http//www.microsoft.com/communities/chats/default
  .mspx
• http//www.microsoft.com/seminar/events/webcasts/d
  efault.mspx
• Locate a local user group(s)
• http//www.microsoft.com/communities/usergroups/de
  fault.mspx
• Non-Microsoft Community Sites
• http//www.microsoft.com/communities/related/defau
  lt.mspx

20
Community Resources

• Windows Hardware and Driver Central (WHDC)
• www.microsoft.com/whdc/default.mspx
• Technical Communities
• www.microsoft.com/communities/products/default.msp
  x
• Non-Microsoft Community Sites
• www.microsoft.com/communities/related/default.mspx
  
• Microsoft Public Newsgroups
• www.microsoft.com/communities/newsgroups
• Technical Chats and Webcasts
• www.microsoft.com/communities/chats/default.mspx
• www.microsoft.com/webcasts
• Microsoft Blogs
• www.microsoft.com/communities/blogs