[SOLVED] c - using nl80211 without libnl or libnl-genl?

Issue

I'm hoping to just use the header in the kernel, linux/nl80211.h to get the channel my network device is on. I'm on a very restricted system where building has to happen with a minimum number of extra packages. It feels strange that SIOCGIWFREQ would be so easy to get, but I'd need a library to just get a frequency via nl80211.

Are there any examples of how to use the nl80211 interface directly in Linux? I'm just hoping to get NL80211_FREQUENCY_ATTR_FREQ

Solution

After a lot of struggling, I found out! It's actually easier to use netlink without libnl, as long as you're not doing anything complicated.

I wrote up an example here that prints all your wireless devices, what networks and channels they're connected to: https://github.com/cnlohr/netlink_without_libnl/blob/master/without_libnl.c

Answered By - Charles Lohr

Answer Checked By - Gilberto Lyons (WPSolving Admin)