Function ieee80211_setup_rates

freebsd/net80211/ieee80211_input.c:393–420

* Install received rate set information in the node's state block. */

 * Install received rate set information in the node's state block.
 */
int
ieee80211_setup_rates(struct ieee80211_node *ni,
	const uint8_t *rates, const uint8_t *xrates, int flags)
{
	struct ieee80211vap *vap = ni->ni_vap;
	struct ieee80211_rateset *rs = &ni->ni_rates;

	memset(rs, 0, sizeof(*rs));
	rs->rs_nrates = rates[1];
	memcpy(rs->rs_rates, rates + 2, rs->rs_nrates);
	if (xrates != NULL) {
		uint8_t nxrates;
		/*
		 * Tack on 11g extended supported rate element.
		 */
		nxrates = xrates[1];
		if (rs->rs_nrates + nxrates > IEEE80211_RATE_MAXSIZE) {
			nxrates = IEEE80211_RATE_MAXSIZE - rs->rs_nrates;
			IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE, ni,
			    "extended rate set too large; only using "
			    "%u of %u rates", nxrates, xrates[1]);
			vap->iv_stats.is_rx_rstoobig++;
		}
		memcpy(rs->rs_rates + rs->rs_nrates, xrates+2, nxrates);
		rs->rs_nrates += nxrates;
	}
	return ieee80211_fix_rate(ni, rs, flags);
}

/*
 * Send a management frame error response to the specified