[PATCH 2/3] driver_nl80211:: Add wmm regulatory limitation to NL80211_CMD_GET_WIPHY

[Andrei Otcheretianski <andrei.otcheretianski@xxxxxxxxx>]

From: Haim Dreyfuss <haim.dreyfuss@xxxxxxxxx>

Check if the channel has WMM limitaion.
In that case store the data so it can be used later.

Signed-off-by: Haim Dreyfuss <haim.dreyfuss@xxxxxxxxx>
---
 src/drivers/driver_nl80211_capa.c | 51 +++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/src/drivers/driver_nl80211_capa.c b/src/drivers/driver_nl80211_capa.c
index 37eeb5e668..8d04833507 100644
--- a/src/drivers/driver_nl80211_capa.c
+++ b/src/drivers/driver_nl80211_capa.c
@@ -1492,6 +1492,57 @@ static void phy_info_freq(struct hostapd_hw_modes *mode,
 		chan->dfs_cac_ms = nla_get_u32(
 			tb_freq[NL80211_FREQUENCY_ATTR_DFS_CAC_TIME]);
 	}
+
+	chan->wmm_rules_valid = 0;
+	if (tb_freq[NL80211_FREQUENCY_ATTR_WMM]) {
+		static struct nla_policy wmm_policy[NL80211_WMMR_MAX + 1] = {
+			[NL80211_WMMR_CW_MIN] = { .type = NLA_U16 },
+			[NL80211_WMMR_CW_MAX] = { .type = NLA_U16 },
+			[NL80211_WMMR_AIFSN] = { .type = NLA_U8 },
+			[NL80211_WMMR_TXOP] = { .type = NLA_U16 },
+		};
+		struct nlattr *nl_wmm;
+		struct nlattr *tb_wmm[NL80211_WMMR_MAX + 1];
+		int rem_wmm, ac = 0;
+
+		nla_for_each_nested(nl_wmm, tb_freq[NL80211_FREQUENCY_ATTR_WMM],
+				    rem_wmm) {
+			if (nla_parse_nested(tb_wmm, NL80211_WMMR_MAX, nl_wmm,
+					     wmm_policy)) {
+				wpa_printf(MSG_DEBUG,
+					   "nl80211: Failed to parse wmm rules attribute");
+				return;
+			}
+			if (!tb_wmm[NL80211_WMMR_CW_MIN] ||
+			    !tb_wmm[NL80211_WMMR_CW_MAX] ||
+			    !tb_wmm[NL80211_WMMR_AIFSN] ||
+			    !tb_wmm[NL80211_WMMR_TXOP]) {
+				wpa_printf(MSG_DEBUG,
+					   "nl80211: channel is missing wmm rule attribute");
+				return;
+			}
+			ac = nl_wmm->nla_type;
+			if (ac >= WMM_AC_NUM) {
+				wpa_printf(MSG_DEBUG,
+					   "nl80211: invalid ac value %d",
+					   ac);
+				return;
+			}
+
+			chan->wmm_rules[ac].min_cwmin =
+				nla_get_u16(tb_wmm[NL80211_WMMR_CW_MIN]);
+			chan->wmm_rules[ac].min_cwmax =
+				nla_get_u16(tb_wmm[NL80211_WMMR_CW_MAX]);
+			chan->wmm_rules[ac].min_aifs =
+				nla_get_u8(tb_wmm[NL80211_WMMR_AIFSN]);
+			chan->wmm_rules[ac].max_txop =
+				nla_get_u16(tb_wmm[NL80211_WMMR_TXOP]) / 32;
+		}
+
+		/* Set valid flag if all the AC rules are present */
+		if (ac == WMM_AC_NUM - 1)
+			chan->wmm_rules_valid = 1;
+	}
 }
 
 
-- 
2.19.1


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