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mac80211_hwsim: Add tsf to beacons, probe responses and radiotap header.

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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>
This commit is contained in:
Javier Cardona 2012-03-05 17:20:37 -08:00 committed by John W. Linville
parent 6b62bf3263
commit 2f40b94049
1 changed files with 26 additions and 1 deletions
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27
drivers/net/wireless/mac80211_hwsim.c
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@ -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 */