Date: Sat, 30 Oct 1999 17:08:52 +0400 From: 3APA3A <3APA3A@SECURITY.NNOV.RU> To: vulN-DEV@SECURITYFOCUS.COM, bugtraq@securityfocus.com Cc: security@freebsd.org Subject: FreeBSD listen() again Message-ID: <19714.991030@SECURITY.NNOV.RU>
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Hello vulN-DEV@,
I wasn't right in defining the problem for backlog in listen()
as it was correctly pointed by Sebastian <scut@nb.in-berlin.de>:
-=-=-=-=-
For some unknown reasons berkeley derived implementations multiply backlog
with 1.5. (backlog = 5 will turn to 8 for example).
-=-=-=-=-
It seems real queue length is counted as
backlog + (backlog+1)>>1
that's why listen(sock, 1) will never work as it should. It will
allow to establish 2 connections. It's for both FreeBSD 2.2.x and
3.x, so the problem is even deeper.
/\_/\
{ . . } |\
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X5O!P@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*
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