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From: Jacques Thomas <jthomas@cs.purdue.edu>
To: SE Linux <selinux@tycho.nsa.gov>
Subject: SECMARK: implementation question
Date: Sun, 11 Oct 2009 00:27:14 -0400	[thread overview]
Message-ID: <4AD15EA2.9050804@cs.purdue.edu> (raw)

Dear All,

If I understand correctly, the permission check for inbound packet (the 
"packet recv" operation) is performed by selinux_socket_sock_recv_skb, 
which hooks into the socket_sock_recv_skb hook.

Does anybody remember the rationale for doing the check there instead of 
the NF_INET_LOCAL_IN hook ?

I am asking that because the permission for outbound packets ("packet 
send") seems to be performed in the NF_INET_LOCAL_OUT. I am sure there 
should be a good reason for this asymetry, but I don't get it.

Thanks for your time,
Jacques Thomas

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             reply	other threads:[~2009-10-11  4:27 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-10-11  4:27 Jacques Thomas [this message]
2009-10-12 22:46 ` SECMARK: implementation question Paul Moore
2009-10-12 23:47   ` Jacques Thomas

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