mac80211_hwsim: support parent TSF feature

Commit Message

James Prestwood Nov. 19, 2019, 10:15 p.m. UTC

Only iwlwifi actually enables this feature, but the support for sending
parent TSF/BSSID values already exists in nl80211. This patch sets the
appropriate flag and mactime values in rx_status so that the parent TSF
value gets included in the scan results.

Signed-off-by: James Prestwood <[e-mail]>
---
 drivers/net/wireless/mac80211_hwsim.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

Comments

Johannes Berg Nov. 22, 2019, 12:08 p.m. UTC | #1

Please split this patch. The only thing actually related to what your
commit log mentions is the first part setting the nl80211 feature bit.

The rest is just porting some existing code to the wmediumd code path.

johannes

Patch

diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 772e54f0696f..01b2ac9707cc 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -2825,6 +2825,7 @@  static int mac80211_hwsim_new_radio(struct genl_info *info,
 			       NL80211_FEATURE_DYNAMIC_SMPS |
 			       NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
 	wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_VHT_IBSS);
+	wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_BSS_PARENT_TSF);
 
 	hw->wiphy->interface_modes = param->iftypes;
 
@@ -3237,6 +3238,8 @@  static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
 	int frame_data_len;
 	void *frame_data;
 	struct sk_buff *skb = NULL;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb_2->data;
+	u64 now;
 
 	if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
 	    !info->attrs[HWSIM_ATTR_FRAME] ||
@@ -3299,6 +3302,18 @@  static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
 	rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
 	rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
 
+	if (ieee80211_is_beacon(hdr->frame_control) ||
+	    ieee80211_is_probe_resp(hdr->frame_control)) {
+		rx_status.boottime_ns = ktime_get_boottime_ns();
+		now = data2->abs_bcn_ts;
+	} else {
+		now = mac80211_hwsim_get_tsf_raw();
+	}
+
+	rx_status.mactime = now + data2->tsf_offset;
+
+	rx_status.flag |= RX_FLAG_MACTIME_START;
+
 	memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 	data2->rx_pkts++;
 	data2->rx_bytes += skb->len;