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  2. PRB: recv() w/MSG_PEEK Always Returns Wrong Buffer Size

PRB: recv() w/MSG_PEEK Always Returns Wrong Buffer Size

Symptoms

An Application that uses the Winsock 1.1 call recv(..., MSG_PEEK) repeatedly, will always receive the amount of data as in the first call. This amount only changes when you call recv without MSG_PEEK.

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Cause

This is the result of a performance optimization within AFD.SYS.

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Resolution

recv() with MSG_PEEK should generally be avoided. It is a very inefficient way to retrieve data and definitely not recommended if you care about performance. A much better solution would be to simply receive the data into user buffers and use it directly from there.

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Status

This behavior is by design.

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Keywords: kbtshoot, kbwinsock, kbapi, kbnetwork, kbprb, KB140263

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Article Info
Article ID : 140263
Revision : 1
Created on : 3/8/1999
Published on : 3/8/1999
Exists online : False
Views : 303