Windows Core Networking

The final version of the Windows Web Services API for Windows XP, Windows Vista, Windows Server 2003 and Windows Server 2008 is now available. This version corresponds to the final version of the WWSAPI released as part of Windows 7 and Windows Server...

For the super eagle eyed developer or Web Server admin, you might have noticed that cache entry validation happens slightly less frequently in IE8. I’m talking about the check to the Web Server (via If-Modified-Since ) to see if the cached version of...

HTTP is a request/response protocol. You request some resource like the HTML of a webpage and the response comes back with the HTML attached.  As each request is sent on a connection, the complete response must be read from the connection before...

Update: This tool is no longer available on Microsoft Connect and there is no replacement download site. In my last post , I announced the availability of QoS Traffic Generator on Microsoft Connect. In order to help you understand the usage of this...

Just a quick note that over on on haoxu’ s “Lost in History” blog is a posting about how to create and register test SSL certs in http.sys for the Windows Web Services API Security Sample code . This might also be useful for developers using the http...

Update: This tool is no longer available on Microsoft Connect and there is no replacement download site. I’m posting on behalf of Jim Liu who is a SDET in Windows Core Networking. -- Ari The QoS team is pleased to announce the availability...

Windows Web Services API team has just release the Beta version of the API for Windows XP, Windows Vista, Windows Server 2003 and Windows Server 2008. It is available now on the Connect site for Windows Networking . This release contains the same version...

Hello all. My name is Charley. I’m the new QoS program manager for Windows Core Networking. It has been a while since we posted our last article about QoS. We want to assure you that we’re still committed to improving this technology and building new...

We are demoing Windows 7 Direct Access and Windows 7 Branch Cache at the PDC08 pavillion. We are the second booth to the left when you come in to the Big Room, shaing space with the Windows 7 Sensor folks. Come check it out at talk to us. -- Ari

I’ve been pretty busy Engineering Windows 7 with the rest of the windows networking team and we are really excited to start showing the world some of the work we’ve done at PDC. One of the things we’ve been working on has it’s own session: “Windows 7...

Hello All, I am continuing the "WinHTTP Questions" series with some questions on WinHTTP callbacks. Is it correct that WinHTTP Callbacks will occur *only* during an in-progress WinHTTP operation? Is it possible that an external event (such as the remote...

Hello, my name is Deepak and I'm a SDET in serviceability. We handle a bunch of questions from developers using WinHTTP, and thought we might share then in a new posting series, "WinHTTP Questions". Can I cancel a synchronous WinHttpSendRequest call...

Windows Server 2008 incorporates the completely rewritten TCP/IP stack we shipped in Windows Vista and since this is the first server release with the stack we'd like to ask our readers to load up Windows Server RC1 and see if your applications are ready...

Just wanted to drop a quick Happy New Year to our readers and see if there is any topics that you want to hear about. We've been pretty busy with Windows Server 2008, Windows Vista SP1 and future windows releases. With the RTM of Windows Server 2008 and...

In his introductory post about the legacy Traffic Control (TC) API , Gabe discussed the host-based model that TC provides. In this post, we will see how Traffic Control APIs can be used to achieve the following for TCP/IPv4 and UDP/IPv4 traffic sent from...

Disclaimer: Traffic Control (TC) APIs have been marked as deprecated , and will be phased out (eventually removed) when a suitable replacement API is available. No advancements will be made to these APIs (including adding IPv6 support) in their deprecated...

A number of partners who author wireless drivers for Vista have asked how they can ensure their WiFi Wireless Multimedia (WMM) implementation is correct, so I thought I'd be explicit about this very important topic. To begin, read the 4-part series WiFi...

Parts 1 and 2 of this series discussed how to determine whether an 802.1p tag was added to traffic, and how to modify the NDIS light-weight-filter (LWF) sample driver source code to accomplish this task. We do know that you're all very busy and not everyone...

In Gabe’s last post on detecting 802.1p priority tags, he described at a relatively high-level why it is difficult to detect a priority tag using packet tracing applications, as well as the proper way to determine whether a tag was present in a packet...

Consider a case where a network application calls Windows QoS APIs to add a layer-2 IEEE 802.1Q UserPriority tag (almost always referred to as 802.1p ) to outgoing traffic. Ascertaining whether the tag actually got added to an outgoing packet is not as...

Mark Russinovich has a great post today on the what and how of the network/multimedia vista issue that people have recently been talking about. Amusingly enough a couple people on /. more or less figured it out, but are only modded 3 and lower. Go Figure...

Ask Perf, the blog of the Enterprise Platforms Windows Server Performance Team, is spending some time explaining a bit of how WinInet/WinHTTP and their surrounding components work with each other. Go check it out ! -- Ari

Hi, my name is Katarzyna and I am the Program Manager within the Internet Protocols team. I have been asked a few times about the Receive Window Auto-Tuning feature on Vista and some associated issues people are having. One of the many cool new features...

I recently needed to generate XML from PowerShell and was disappointed to see the PowerShell blog use the old ASP model of doing text insertion into the middle of a big string. It might be the tester in me, or the security training, but with some unexpected...

I noticed that there was a demo of Rally technologies at the WinHEC keynote the other day, so I created a link to part of the keynote with the Rally demo . Enjoy. -- Ari Pernick