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authorJavier Cardona <javier@cozybit.com>2012-03-05 17:20:37 -0800
committerJohn W. Linville <linville@tuxdriver.com>2012-03-06 15:16:17 -0500
commit2f40b9404903dba89d70d706ee71263f9babd109 (patch)
tree29f71a6f98c327376a458210b8a4af2c2853995a /drivers/net/wireless/mac80211_hwsim.c
parent6b62bf326393deede630731a933713de9d574128 (diff)
mac80211_hwsim: Add tsf to beacons, probe responses and radiotap header.
Generate a tsf from internal kernel clock. Prepare the path for having different tsf offsets on each phy. This will be useful for testing mesh synchronization algorithms. Signed-off-by: Javier Cardona <javier@cozybit.com> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/mac80211_hwsim.c')
-rw-r--r--drivers/net/wireless/mac80211_hwsim.c27
1 files changed, 26 insertions, 1 deletions
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index ba16f05df0f..14a3cac19a3 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -27,6 +27,7 @@
#include <linux/etherdevice.h>
#include <linux/debugfs.h>
#include <linux/module.h>
+#include <linux/ktime.h>
#include <net/genetlink.h>
#include "mac80211_hwsim.h"
@@ -321,11 +322,15 @@ struct mac80211_hwsim_data {
struct dentry *debugfs_group;
int power_level;
+
+ /* difference between this hw's clock and the real clock, in usecs */
+ u64 tsf_offset;
};
struct hwsim_radiotap_hdr {
struct ieee80211_radiotap_header hdr;
+ __le64 rt_tsft;
u8 rt_flags;
u8 rt_rate;
__le16 rt_channel;
@@ -367,6 +372,12 @@ static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
return NETDEV_TX_OK;
}
+static __le64 __mac80211_hwsim_get_tsf(struct mac80211_hwsim_data *data)
+{
+ struct timeval tv = ktime_to_timeval(ktime_get_real());
+ u64 now = tv.tv_sec * USEC_PER_SEC + tv.tv_usec;
+ return cpu_to_le64(now + data->tsf_offset);
+}
static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
struct sk_buff *tx_skb)
@@ -391,7 +402,9 @@ static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
(1 << IEEE80211_RADIOTAP_RATE) |
+ (1 << IEEE80211_RADIOTAP_TSFT) |
(1 << IEEE80211_RADIOTAP_CHANNEL));
+ hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
hdr->rt_flags = 0;
hdr->rt_rate = txrate->bitrate / 5;
hdr->rt_channel = cpu_to_le16(data->channel->center_freq);
@@ -610,7 +623,8 @@ static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
}
memset(&rx_status, 0, sizeof(rx_status));
- /* TODO: set mactime */
+ rx_status.mactime = le64_to_cpu(__mac80211_hwsim_get_tsf(data));
+ rx_status.flag |= RX_FLAG_MACTIME_MPDU;
rx_status.freq = data->channel->center_freq;
rx_status.band = data->channel->band;
rx_status.rate_idx = info->control.rates[0].idx;
@@ -667,6 +681,12 @@ static void mac80211_hwsim_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
bool ack;
struct ieee80211_tx_info *txi;
u32 _pid;
+ struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) skb->data;
+ struct mac80211_hwsim_data *data = hw->priv;
+
+ if (ieee80211_is_beacon(mgmt->frame_control) ||
+ ieee80211_is_probe_resp(mgmt->frame_control))
+ mgmt->u.beacon.timestamp = __mac80211_hwsim_get_tsf(data);
mac80211_hwsim_monitor_rx(hw, skb);
@@ -763,9 +783,11 @@ static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
struct ieee80211_vif *vif)
{
struct ieee80211_hw *hw = arg;
+ struct mac80211_hwsim_data *data = hw->priv;
struct sk_buff *skb;
struct ieee80211_tx_info *info;
u32 _pid;
+ struct ieee80211_mgmt *mgmt;
hwsim_check_magic(vif);
@@ -779,6 +801,9 @@ static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
return;
info = IEEE80211_SKB_CB(skb);
+ mgmt = (struct ieee80211_mgmt *) skb->data;
+ mgmt->u.beacon.timestamp = __mac80211_hwsim_get_tsf(data);
+
mac80211_hwsim_monitor_rx(hw, skb);
/* wmediumd mode check */