Hi On Tue, Mar 19, 2013 at 10:15:43AM +0800, vaughan (vaughan.cao@xxxxxxxxxx) wrote: > 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)). Iirc, first groups, created before bitmap-to-number conversion were actually bitmaps, but then broadcast interface was obsoleted. One should use NETLINK_ADD_MEMBERSHIP interface and specify gruop number directly. > 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. Yes, you are right. -- Evgeniy Polyakov _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
