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Message-Id: <1428095523-374-1-git-send-email-greearb@candelatech.com>
Date: Fri, 3 Apr 2015 14:12:00 -0700
From: greearb@...delatech.com
To: netdev@...r.kernel.org
Cc: johannes@...solutions.net, Ben Greear <greearb@...delatech.com>
Subject: [PATCH 1/4] mac80211-hwsim: notify user-space about channel change.
From: Ben Greear <greearb@...delatech.com>
The goal is to allow the user-space application to properly
filter packets before sending them down to the kernel. This
should more closely mimic what a real piece of hardware would
do.
Signed-off-by: Ben Greear <greearb@...delatech.com>
---
drivers/net/wireless/mac80211_hwsim.c | 48 +++++++++++++++++++++++++++++++++++
drivers/net/wireless/mac80211_hwsim.h | 6 +++++
2 files changed, 54 insertions(+)
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 8908be6..d0e88b2 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -871,6 +871,52 @@ static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
return true;
}
+static void mac80211_hwsim_check_nl_notify(struct mac80211_hwsim_data *data)
+{
+ struct sk_buff *skb;
+ u32 center_freq = 0;
+ u32 _portid;
+ void *msg_head;
+
+ /* wmediumd mode check */
+ _portid = ACCESS_ONCE(wmediumd_portid);
+
+ if (!_portid)
+ return;
+
+ skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
+ if (skb == NULL)
+ goto err_print;
+
+ msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
+ HWSIM_CMD_NOTIFY);
+ if (msg_head == NULL) {
+ printk(KERN_DEBUG "mac80211_hwsim: problem with msg_head, notify\n");
+ goto nla_put_failure;
+ }
+
+ if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER,
+ ETH_ALEN, data->addresses[1].addr))
+ goto nla_put_failure;
+
+ if (data->channel)
+ center_freq = data->channel->center_freq;
+
+ if (nla_put_u32(skb, HWSIM_ATTR_FREQ, center_freq))
+ goto nla_put_failure;
+
+ genlmsg_end(skb, msg_head);
+ if (genlmsg_unicast(&init_net, skb, _portid))
+ goto err_print;
+
+ return;
+
+nla_put_failure:
+ nlmsg_free(skb);
+err_print:
+ printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
+}
+
static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
struct sk_buff *my_skb,
int dst_portid)
@@ -1465,6 +1511,8 @@ static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
HRTIMER_MODE_REL);
}
+ mac80211_hwsim_check_nl_notify(data);
+
return 0;
}
diff --git a/drivers/net/wireless/mac80211_hwsim.h b/drivers/net/wireless/mac80211_hwsim.h
index 66e1c73..f0fc495c 100644
--- a/drivers/net/wireless/mac80211_hwsim.h
+++ b/drivers/net/wireless/mac80211_hwsim.h
@@ -71,6 +71,11 @@ enum hwsim_tx_control_flags {
* @HWSIM_CMD_DEL_RADIO: destroy a radio, reply is multicasted
* @HWSIM_CMD_GET_RADIO: fetch information about existing radios, uses:
* %HWSIM_ATTR_RADIO_ID
+ * @HWSIM_CMD_NOTIFY: notify user-space about driver changes. This is
+ * designed to help the user-space app better emulate radio hardware.
+ * This command uses:
+ * %HWSIM_ATTR_FREQ # Notify current operating center frequency.
+ * %HWSIM_ATTR_ADDR_TRANSMITTER # ID which radio we are notifying about.
* @__HWSIM_CMD_MAX: enum limit
*/
enum {
@@ -81,6 +86,7 @@ enum {
HWSIM_CMD_NEW_RADIO,
HWSIM_CMD_DEL_RADIO,
HWSIM_CMD_GET_RADIO,
+ HWSIM_CMD_NOTIFY,
__HWSIM_CMD_MAX,
};
#define HWSIM_CMD_MAX (_HWSIM_CMD_MAX - 1)
--
1.7.11.7
--
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