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Winsock SO_EXCLUSIVEADDRUSE on Vista

Posted Monday, March 19, 2007 2:12 PM by wndpteam
I've been asked a couple times about the socket option SO_EXCLUSIVEADDRUSE on Vista and especially how it relates to dual stack sockets. The following doc link describes the basic idea of this socket option: http://msdn2.microsoft.com/en-us/library/ms740621.aspx Read More...
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Winsock Header Weirdness

Posted Monday, December 18, 2006 3:35 PM by wndpteam
There are two main Winsock headers used depending on which version your application needs. There is winsock.h for Winsock v1.x and winsock2.h for Winsock v2.x and they are mutually exclusive. That is, if you include both header files you will see a lot Read More...
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Our Mike Flasko and Anthony Jones on Channel 9

Posted Wednesday, December 13, 2006 7:46 AM by wndpteam
There is a new video up on channel9 talking about Coding to support IPv6. Go check it out! -- Ari Pernick Read More...
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LSP Installation Problems with WSCInstallProvider64_32

Posted Tuesday, November 28, 2006 1:51 PM by wndpteam
An LSP (or Winsock provider) can be installed into the Winsock catalog through several different function calls. Also, as you might know, on 64-bit Windows there are two different Winsock catalogs – one for 32-bit applications and one for 64-bit native Read More...
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WSAPoll, A new Winsock API to simplify porting poll() applications to Winsock.

Posted Thursday, October 26, 2006 8:49 AM by wndpteam
Hello, my name is Chad Carlin. I'm a software developer on the Winsock Test Team. Among the many improvements to the Winsock API shipping in Vista is the new WSAPoll function. Its primary purpose is to simplify the porting of a sockets application that Read More...
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Creating IP Agnostic Applications - Part 2 (Dual Mode Sockets)

Posted Tuesday, October 24, 2006 10:59 AM by wndpteam
In a previous post I wrote about how on Windows Vista and Windows Server "Longhorn," IPv6 is installed and enabled by default and that when both IPv4 and IPv6 are enabled, the TCP/IP stack prefers to use IPv6 over IPv4. With the growth of IPv6, applications Read More...
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Debugging Winsock LSPs

Posted Thursday, October 05, 2006 11:47 AM by wndpteam
Several people have asked for tips on debugging LSPs, and unfortunately there’s no easy method to do so. One difficulty with LSPs is that once it’s installed any number of processes can immediately load the faulty LSP and begin to behave badly. This usually Read More...
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Creating IP Agnostic Applications - Part 1

Posted Tuesday, August 29, 2006 8:00 AM by wndpteam
In Windows Vista and Windows Server "Longhorn," IPv6 is installed and enabled by default. When both IPv4 and IPv6 are enabled on these OSs, the TCP/IP stack prefers to use IPv6 over IPv4. For example, APIs such as ConnectByName will attempt to connect Read More...
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WSAConnectByName() and WSAConnectByList()

Posted Tuesday, July 25, 2006 3:00 PM by wndpteam
G’Day, my name is Brad Williamson, a Software Design Engineer with the Windows Networking Developer Platform (WNDP) group here at Microsoft. I am going to talk about two APIs that were introduced in Windows Vista Beta 2 to simplify the process of connecting Read More...
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The (new) Trouble with select and LSPs...

Posted Thursday, July 13, 2006 11:00 AM by wndpteam
If you’ve ever had to deal with Winsock LSPs, then you probably know that handling select function calls are rather convoluted – especially with certain apps that pass multiple socket types into select. Some applications (like IE) will pass a UDP/IPv4 Read More...
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WNDP Connect Site gets an upgrade!

Posted Tuesday, June 06, 2006 9:32 AM by wndpteam
Last year we setup a small site on connect.microsoft.com in order to let our blog readers, developers and users file bugs, make suggestions and get some conntent like whitepapers and samples early. The downside to the site was that you couldn't easily Read More...
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Winsock and the new SDK Headers

Posted Friday, April 07, 2006 1:45 PM by wndpteam
As you may have noticed in the recent Vista CTP SDK, the Winsock headers have undergone some changes. First, instead of a couple monolithic files (winsock2.h and mswsock.h), they have been split into a number of smaller files for ease of maintenance as Read More...
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Introduction to Winsock Kernel (WSK)

Posted Friday, February 24, 2006 9:45 AM by wndpteam
Overview of WSK In Windows Vista a new transport-independent kernel mode Network Programming Interface (NPI) called Winsock Kernel (WSK) has been added. Using WSK, kernel-mode software modules can perform network communication using socket-like programming Read More...
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Winsock and Vista User Account Control

Posted Wednesday, February 22, 2006 9:41 AM by wndpteam
As you might have heard, Vista introduces User Account Control (UAC) which is a security feature that enables users to perform some tasks as non-Administrators. This has an effect on LSP writers as the Winsock functions to install and remove LSP entries Read More...
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Categorizing LSPs and Applications

Posted Thursday, February 09, 2006 4:53 PM by wndpteam
In Windows Vista there is a new method for categorizing both Winsock Layered Service Providers (LSP) and applications themselves such that only certain LSPs will be loaded. There are a couple reasons for adding this functionality. One of the main reasons Read More...
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