ieee802154: move validation check out of softmac

This patch moves the value validation out of softmac layer. We need
to be sure now that this value is accepted by the transceiver/mac802154 or
"possible" hardmac drivers before calling rdev-ops.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/ieee802154/nl802154.c

@@ -625,7 +625,8 @@ static int nl802154_set_channel(struct sk_buff *skb, struct genl_info *info)
 	channel = nla_get_u8(info->attrs[NL802154_ATTR_CHANNEL]);
 
 	/* check 802.15.4 constraints */
-	if (page > IEEE802154_MAX_PAGE || channel > IEEE802154_MAX_CHANNEL)
+	if (page > IEEE802154_MAX_PAGE || channel > IEEE802154_MAX_CHANNEL ||
+	    !(rdev->wpan_phy.channels_supported[page] & BIT(channel)))
 		return -EINVAL;
 
 	return rdev_set_channel(rdev, page, channel);
@@ -674,6 +675,16 @@ static int nl802154_set_pan_id(struct sk_buff *skb, struct genl_info *info)
 
 	pan_id = nla_get_le16(info->attrs[NL802154_ATTR_PAN_ID]);
 
+	/* TODO
+	 * I am not sure about to check here on broadcast pan_id.
+	 * Broadcast is a valid setting, comment from 802.15.4:
+	 * If this value is 0xffff, the device is not associated.
+	 *
+	 * This could useful to simple deassociate an device.
+	 */
+	if (pan_id == cpu_to_le16(IEEE802154_PAN_ID_BROADCAST))
+		return -EINVAL;
+
 	return rdev_set_pan_id(rdev, wpan_dev, pan_id);
 }
 
@@ -695,6 +706,21 @@ static int nl802154_set_short_addr(struct sk_buff *skb, struct genl_info *info)
 
 	short_addr = nla_get_le16(info->attrs[NL802154_ATTR_SHORT_ADDR]);
 
+	/* TODO
+	 * I am not sure about to check here on broadcast short_addr.
+	 * Broadcast is a valid setting, comment from 802.15.4:
+	 * A value of 0xfffe indicates that the device has
+	 * associated but has not been allocated an address. A
+	 * value of 0xffff indicates that the device does not
+	 * have a short address.
+	 *
+	 * I think we should allow to set these settings but
+	 * don't allow to allow socket communication with it.
+	 */
+	if (short_addr == cpu_to_le16(IEEE802154_ADDR_SHORT_UNSPEC) ||
+	    short_addr == cpu_to_le16(IEEE802154_ADDR_SHORT_BROADCAST))
+		return -EINVAL;
+
 	return rdev_set_short_addr(rdev, wpan_dev, short_addr);
 }
 

net/mac802154/cfg.c

@@ -73,10 +73,6 @@ ieee802154_set_channel(struct wpan_phy *wpan_phy, u8 page, u8 channel)
 
 	ASSERT_RTNL();
 
-	/* check if phy support this setting */
-	if (!(wpan_phy->channels_supported[page] & BIT(channel)))
-		return -EINVAL;
-
 	ret = drv_set_channel(local, page, channel);
 	if (!ret) {
 		wpan_phy->current_page = page;
@@ -112,16 +108,6 @@ ieee802154_set_pan_id(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
 {
 	ASSERT_RTNL();
 
-	/* TODO
-	 * I am not sure about to check here on broadcast pan_id.
-	 * Broadcast is a valid setting, comment from 802.15.4:
-	 * If this value is 0xffff, the device is not associated.
-	 *
-	 * This could useful to simple deassociate an device.
-	 */
-	if (pan_id == cpu_to_le16(IEEE802154_PAN_ID_BROADCAST))
-		return -EINVAL;
-
 	wpan_dev->pan_id = pan_id;
 	return 0;
 }
@@ -149,21 +135,6 @@ ieee802154_set_short_addr(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
 {
 	ASSERT_RTNL();
 
-	/* TODO
-	 * I am not sure about to check here on broadcast short_addr.
-	 * Broadcast is a valid setting, comment from 802.15.4:
-	 * A value of 0xfffe indicates that the device has
-	 * associated but has not been allocated an address. A
-	 * value of 0xffff indicates that the device does not
-	 * have a short address.
-	 *
-	 * I think we should allow to set these settings but
-	 * don't allow to allow socket communication with it.
-	 */
-	if (short_addr == cpu_to_le16(IEEE802154_ADDR_SHORT_UNSPEC) ||
-	    short_addr == cpu_to_le16(IEEE802154_ADDR_SHORT_BROADCAST))
-		return -EINVAL;
-
 	wpan_dev->short_addr = short_addr;
 	return 0;
 }