netdev - [PATCH wpan/next v4 4/8] ieee802154: hwsim: Record the address filter values

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Message-Id: <20221007085310.503366-5-miquel.raynal@bootlin.com>
Date:   Fri,  7 Oct 2022 10:53:06 +0200
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Alexander Aring <alex.aring@...il.com>,
        Stefan Schmidt <stefan@...enfreihafen.org>,
        linux-wpan@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>, netdev@...r.kernel.org,
        David Girault <david.girault@...vo.com>,
        Romuald Despres <romuald.despres@...vo.com>,
        Frederic Blain <frederic.blain@...vo.com>,
        Nicolas Schodet <nico@...fr.eu.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>
Subject: [PATCH wpan/next v4 4/8] 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@...tlin.com>
---
 drivers/net/ieee802154/mac802154_hwsim.c | 36 ++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/drivers/net/ieee802154/mac802154_hwsim.c b/drivers/net/ieee802154/mac802154_hwsim.c
index 38c217bd7c82..458be66b5195 100644
--- a/drivers/net/ieee802154/mac802154_hwsim.c
+++ b/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);
-- 
2.34.1