From: Steve Grubb <sgrubb@redhat.com>
To: Kangkook Jee <aixer77@gmail.com>
Cc: linux-audit@redhat.com
Subject: Re: auditd reports port number '0' for connect() system call
Date: Thu, 31 Mar 2016 17:50:23 -0400 [thread overview]
Message-ID: <2356527.JVHcORIXqi@x2> (raw)
In-Reply-To: <AE5F3C07-3DA7-4DD9-9B9D-7807518DB4A6@gmail.com>
On Thursday, March 31, 2016 08:54:30 AM Kangkook Jee wrote:
> but, last three one didn’t
>
> $ ~/bin/sock_decode 0200000036447A640000000000000000
> 0200000036447A640000000000000000: sa_family: 2 addr: 1685734454, port: 0 (0)
> $ ~/bin/sock_decode 020000003644ECD00000000000000000
> 020000003644ECD00000000000000000: sa_family: 2 addr: 3505144886, port: 0 (0)
> $ ~/bin/sock_decode 02000000369520250000000000000000
> 02000000369520250000000000000000: sa_family: 2 addr: 622892342, port: 0 (0)
>
> Would you check this out?
You didn't give the events, but rather the sockaddr field alone. Port 0 is
valid in some uses. It mean give me an ephemeral port.
http://lxr.free-electrons.com/source/net/ipv4/inet_connection_sock.c#L90
90 /* Obtain a reference to a local port for the given sock,
91 * if snum is zero it means select any available local port.
-Steve
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next prev parent reply other threads:[~2016-03-31 21:50 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-30 3:19 auditd reports port number '0' for connect() system call Kangkook Jee
2016-03-30 23:29 ` Steve Grubb
2016-03-31 11:33 ` Kangkook Jee
2016-03-31 12:54 ` Kangkook Jee
2016-03-31 21:50 ` Steve Grubb [this message]
2016-03-31 22:11 ` Kangkook Jee
2016-04-01 12:13 ` Steve Grubb
2016-04-04 18:32 ` Kangkook Jee
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