Function ieee80211_tmp_node

freebsd/net80211/ieee80211_node.c:1443–1488

* Craft a temporary node suitable for sending a management frame * to the specified station. We craft only as much state as we * need to do the work since the node will be immediately reclaimed * once the send completes. */

 * once the send completes.
 */
struct ieee80211_node *
ieee80211_tmp_node(struct ieee80211vap *vap,
	const uint8_t macaddr[IEEE80211_ADDR_LEN])
{
	struct ieee80211com *ic = vap->iv_ic;
	struct ieee80211_node *ni;

	ni = ic->ic_node_alloc(vap, macaddr);
	if (ni != NULL) {
		struct ieee80211_node *bss = vap->iv_bss;

		IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
			"%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr));

		ni->ni_table = NULL;		/* NB: pedantic */
		ni->ni_ic = ic;			/* NB: needed to set channel */
		ni->ni_vap = vap;

		IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
		IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid);
		ieee80211_node_initref(ni);		/* mark referenced */
		/* NB: required by ieee80211_fix_rate */
		ieee80211_node_set_chan(ni, bss->ni_chan);
		ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey,
			IEEE80211_KEYIX_NONE);
		ni->ni_txpower = bss->ni_txpower;
		/* XXX optimize away */
		ieee80211_psq_init(&ni->ni_psq, "unknown");

		ieee80211_ratectl_node_init(ni);

		/* handle failure; free node state */
		if (ic->ic_node_init(ni) != 0) {
			vap->iv_stats.is_rx_nodealloc++;
			ieee80211_psq_cleanup(&ni->ni_psq);
			ieee80211_ratectl_node_deinit(ni);
			_ieee80211_free_node(ni);
			return NULL;
		}

	} else {
		/* XXX msg */
		vap->iv_stats.is_rx_nodealloc++;
	}
	return ni;
}

struct ieee80211_node *
ieee80211_dup_bss(struct ieee80211vap *vap,