ieee802154: hwsim: Record the address filter values

As a first step, introduce a basic implementation for the
->set_hw_addr_filt() hook. In a second step, the values recorded here
will be used to perform proper filtering during reception.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20221007085310.503366-5-miquel.raynal@bootlin.comSigned-off-by: Stefan Schmidt <stefan@datenfreihafen.org>

drivers/net/ieee802154/mac802154_hwsim.c

@@ -47,6 +47,7 @@ static const struct genl_multicast_group hwsim_mcgrps[] = {
 struct hwsim_pib {
 	u8 page;
 	u8 channel;
+	struct ieee802154_hw_addr_filt filt;
 
 	struct rcu_head rcu;
 };
@@ -101,6 +102,38 @@ static int hwsim_hw_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
 	pib->channel = channel;
 
 	pib_old = rtnl_dereference(phy->pib);
+
+	pib->filt.short_addr = pib_old->filt.short_addr;
+	pib->filt.pan_id = pib_old->filt.pan_id;
+	pib->filt.ieee_addr = pib_old->filt.ieee_addr;
+	pib->filt.pan_coord = pib_old->filt.pan_coord;
+
+	rcu_assign_pointer(phy->pib, pib);
+	kfree_rcu(pib_old, rcu);
+	return 0;
+}
+
+static int hwsim_hw_addr_filt(struct ieee802154_hw *hw,
+			      struct ieee802154_hw_addr_filt *filt,
+			      unsigned long changed)
+{
+	struct hwsim_phy *phy = hw->priv;
+	struct hwsim_pib *pib, *pib_old;
+
+	pib = kzalloc(sizeof(*pib), GFP_KERNEL);
+	if (!pib)
+		return -ENOMEM;
+
+	pib_old = rtnl_dereference(phy->pib);
+
+	pib->page = pib_old->page;
+	pib->channel = pib_old->channel;
+
+	pib->filt.short_addr = filt->short_addr;
+	pib->filt.pan_id = filt->pan_id;
+	pib->filt.ieee_addr = filt->ieee_addr;
+	pib->filt.pan_coord = filt->pan_coord;
+
 	rcu_assign_pointer(phy->pib, pib);
 	kfree_rcu(pib_old, rcu);
 	return 0;
@@ -172,6 +205,7 @@ static const struct ieee802154_ops hwsim_ops = {
 	.start = hwsim_hw_start,
 	.stop = hwsim_hw_stop,
 	.set_promiscuous_mode = hwsim_set_promiscuous_mode,
+	.set_hw_addr_filt = hwsim_hw_addr_filt,
 };
 
 static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
@@ -787,6 +821,8 @@ static int hwsim_add_one(struct genl_info *info, struct device *dev,
 	}
 
 	pib->channel = 13;
+	pib->filt.short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
+	pib->filt.pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
 	rcu_assign_pointer(phy->pib, pib);
 	phy->idx = idx;
 	INIT_LIST_HEAD(&phy->edges);