netdev - Altering default SO_PRIORITY of a socket.

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Message-ID: <AANLkTi=X3_fW9cB2nj6W=E9kivU_NfdbhGGh0Fvxbn4d@mail.gmail.com>
Date:	Wed, 19 Jan 2011 11:02:52 +0100
From:	Janek Wrobel <wrr@...gle.com>
To:	netdev@...r.kernel.org
Subject: Altering default SO_PRIORITY of a socket.

Hi,

Does Linux allow to change default priority of listening or connected
sockets, without process ever calling setsockopt(..,SO_PRIORITY,..)?
In other words, in a following sequence of events, is it possible that
priority_a, or priority_b will ever be non 0 (assuming all calls
succeeded)?

sock = socket(AF_INET, SOCK_STREAM, 0);
bind(sock, some address)
listen(sock, ...)
int priority_a;
getsockopt(sock, SOL_SOCKET, SO_PRIORITY, &priority_a, sizeof(priority_a))

client_sock = accept(sock, ...);
int priority_b;
getsockopt(client_sock, SOL_SOCKET, SO_PRIORITY, &priority_b,
sizeof(priority_b))

thanks,
Janek
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