[patch] ifconfig: display DFS related information

[Adrian Chadd]

Hi,

I'd like to extend the channel list output in ifconfig to include the DFS flags.

These include:

* D: channel is DFS enabeld
* R: radar event has been detected on this channel
* I: interference has been detected on this channel
* C: CAC has completed on this channel (and thus can be used)

This is primarily to aid IBSS/hostap developers who are tinkering with
DFS/radar detection, but will be useful moving forward when users are
configuring ibss/hostap in DFS enabled areas (when DFS is fully
supported, that is.)

Thanks,

Adrian

Index: ifieee80211.c
===================================================================
--- ifieee80211.c       (revision 223861)
+++ ifieee80211.c       (working copy)
@@ -3451,9 +3451,13 @@
 {
        char buf[14];

-       printf("Channel %3u : %u%c MHz%-14.14s",
+       printf("Channel %3u : %u%c%c%c%c%c MHz%-14.14s",
                ieee80211_mhz2ieee(c->ic_freq, c->ic_flags), c->ic_freq,
                IEEE80211_IS_CHAN_PASSIVE(c) ? '*' : ' ',
+               IEEE80211_IS_CHAN_DFS(c) ? 'D' : ' ',
+               IEEE80211_IS_CHAN_RADAR(c) ? 'R' : ' ',
+               IEEE80211_IS_CHAN_CWINT(c) ? 'I' : ' ',
+               IEEE80211_IS_CHAN_CACDONE(c) ? 'C' : ' ',
                get_chaninfo(c, verb, buf, sizeof(buf)));
 }