Function ieee80211_send_error

freebsd/net80211/ieee80211_input.c:429–459

* Send a management frame error response to the specified * station. If ni is associated with the station then use * it; otherwise allocate a temporary node suitable for * transmitting the frame and then free the reference so * it will go away as soon as the frame has been transmitted. */

 * it will go away as soon as the frame has been transmitted.
 */
void
ieee80211_send_error(struct ieee80211_node *ni,
	const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg)
{
	struct ieee80211vap *vap = ni->ni_vap;
	int istmp;

	if (ni == vap->iv_bss) {
		if (vap->iv_state != IEEE80211_S_RUN) {
			/*
			 * XXX hack until we get rid of this routine.
			 * We can be called prior to the vap reaching
			 * run state under certain conditions in which
			 * case iv_bss->ni_chan will not be setup.
			 * Check for this explicitly and and just ignore
			 * the request.
			 */
			return;
		}
		ni = ieee80211_tmp_node(vap, mac);
		if (ni == NULL) {
			/* XXX msg */
			return;
		}
		istmp = 1;
	} else
		istmp = 0;
	IEEE80211_SEND_MGMT(ni, subtype, arg);
	if (istmp)
		ieee80211_free_node(ni);
}

int
ieee80211_alloc_challenge(struct ieee80211_node *ni)