On Thu, May 24, 2007 at 09:43:30AM -0000, Samuel Ortiz wrote:
> You could look at Johannes Berg 802.11 generic netlink implementation for
> a good example (net/wireless/nl80211.c in John Linville's tree):
> http://git.kernel.org/?p=linux/kernel/git/linville/wireless-dev.git;a=blob;f=net/wireless/nl80211.c;h=d6a44a386c2b86b81514b08d3c9b324dd2c7d229;hb=HEAD
Looking at that code I suppose that if I want send/receive "struct
pps_netlink_msg" to/from the kernel I have to define:
static struct genl_family pps_gnl_family = {
.id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
.name = "PPS",
.hdrsize = 0, /* no private header */
.version = PPS_FAMILY_VER,
.maxattr = 1,
};
static struct nla_policy pps_genl_policy[1] = {
[0] = {
.type = NLA_BINARY,
.len = sizeof(struct pps_netlink_msg),
},
};
static struct genl_ops pps_gnl_ops = {
.cmd = 0x1,
.policy = pps_genl_policy,
.doit = pps_genl_data_ready,
};
Then the pps_genl_data_ready() should do:
static int pps_genl_data_ready(struct sk_buff *skb, struct genl_info *info)
{
struct pps_netlink_msg *msg = nla_data(info->attrs[0]);
int cmd, source;
unsigned long timeout;
int ret;
if (!msg)
return -EINVAL;
/* Do the job and put the answer into
msg struct itself... */
genlmsg_unicast(skb, info->snd_pid);
return 0;
}
Is that right?
Thanks,
Rodolfo
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