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Implement a utility function to return the current TX power cap for

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the given node.

This takes into account the per-node cap, the ic cap and the
per-channel regulatory caps.

This is designed to replace references to ni_txpower in various net80211
drivers - ni_txpower doesn't necessarily reflect the actual cap for
the given node (eg if the node has the default value of 50dBm (100) and
the administrator has manually configured a lower TX power.)
This commit is contained in:
Adrian Chadd 2013-04-16 20:36:32 +00:00
parent 9adbae037d
commit ebe15a7b25
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=249568
1 changed files with 22 additions and 0 deletions
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22
sys/net80211/ieee80211_var.h
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@ -821,6 +821,28 @@ ieee80211_htchanflags(const struct ieee80211_channel *c)
IEEE80211_IS_CHAN_HT(c) ? IEEE80211_FHT_HT : 0;
}
/*
* Fetch the current TX power (cap) for the given node.
*
* This includes the node and ic/vap TX power limit as needed,
* but it doesn't take into account any per-rate limit.
*/
static __inline uint16_t
ieee80211_get_node_txpower(struct ieee80211_node *ni)
{
struct ieee80211com *ic = ni->ni_ic;
uint16_t txpower;
txpower = ni->ni_txpower;
txpower = MIN(txpower, ic->ic_txpowlimit);
if (ic->ic_curchan != NULL) {
txpower = MIN(txpower, 2 * ic->ic_curchan->ic_maxregpower);
txpower = MIN(txpower, ic->ic_curchan->ic_maxpower);
}
return (txpower);
}
/*
* Debugging facilities compiled in when IEEE80211_DEBUG is defined.
*