netdev - How to assign sockaddr_nl->nl_groups when using connector

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 19 Mar 2013 10:15:43 +0800
From:	vaughan <vaughan.cao@...cle.com>
To:	zbr@...emap.net
CC:	netdev@...r.kernel.org, KY Srinivasan <kys@...rosoft.com>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>
Subject: How to assign sockaddr_nl->nl_groups when using connector

Hi Evgeniy,

I am not quite sure how to assign nl_groups when using connector. You
Documentation/connector/connector.txt don't explain it very clearly. I
thought it's a bitmask representing only 32 groups.
If I just want to subscribe only one group such as CN_KVP_IDX, what
shall I do? Which one below is correct?
a) l_local.nl_groups = CN_KVP_IDX;
Or
b) l_local.nl_groups = 1 << (CN_KVP_IDX -1)
and bind with bind(s, (struct sockaddr *)&l_local, sizeof(struct
sockaddr_nl)).
I ran your example in Documentation/connector/. 'l_local.nl_groups = -1'
in ucon.c seems subscribe all channels, because if I start cgred
service, ucon will receive messages with idx=1.

And it seems setsockopt is not needed now, for it is done by
netlink_autobind? You even comment it out using '#if 0' in
Documentation/connector/ucon.c.

Could you do me a favor to check
http://driverdev.linuxdriverproject.org/pipermail/devel/2013-March/036306.html
to see if my understanding is correct or not? Thanks.

-- 
Regards,
Vaughan

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html