This patch adds support for setting short address via nl802154 framework.
Also added a comment because a 0xffff seems to be valid address that we
don't have a short address. This is a valid setting but we need
more checks in upper layers to don't allow this address as source address.
Also the current netlink interface doesn't allow to set the short_addr
to 0xffff. Same for the 0xfffe short address which describes a not
allocated short address.
Signed-off-by: Alexander Aring <alex.aring@xxxxxxxxx>
---
include/linux/ieee802154.h | 2 ++
include/net/cfg802154.h | 2 ++
net/ieee802154/nl802154.c | 31 +++++++++++++++++++++++++++++++
net/ieee802154/rdev-ops.h | 7 +++++++
net/mac802154/cfg.c | 26 ++++++++++++++++++++++++++
5 files changed, 68 insertions(+)
diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h
index d4037987..ce0f96a 100644
--- a/include/linux/ieee802154.h
+++ b/include/linux/ieee802154.h
@@ -31,6 +31,8 @@
#define IEEE802154_MIN_PSDU_LEN 5
#define IEEE802154_PAN_ID_BROADCAST 0xffff
+#define IEEE802154_ADDR_SHORT_BROADCAST 0xffff
+#define IEEE802154_ADDR_SHORT_UNSPEC 0xfffe
#define IEEE802154_EXTENDED_ADDR_LEN 8
diff --git a/include/net/cfg802154.h b/include/net/cfg802154.h
index d07b072..e8a4c2b 100644
--- a/include/net/cfg802154.h
+++ b/include/net/cfg802154.h
@@ -40,6 +40,8 @@ struct cfg802154_ops {
int (*set_channel)(struct wpan_phy *wpan_phy, u8 page, u8 channel);
int (*set_pan_id)(struct wpan_phy *wpan_phy,
struct wpan_dev *wpan_dev, u16 pan_id);
+ int (*set_short_addr)(struct wpan_phy *wpan_phy,
+ struct wpan_dev *wpan_dev, u16 short_addr);
};
struct wpan_phy {
diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index 88cd1293..2978c1a 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -593,6 +593,29 @@ static int nl802154_set_pan_id(struct sk_buff *skb, struct genl_info *info)
return rdev_set_pan_id(rdev, wpan_dev, pan_id);
}
+static int nl802154_set_short_addr(struct sk_buff *skb, struct genl_info *info)
+{
+ struct cfg802154_registered_device *rdev = info->user_ptr[0];
+ struct net_device *dev = info->user_ptr[1];
+ struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
+ u16 short_addr;
+
+ /* conflict here while tx/rx calls */
+ if (netif_running(dev))
+ return -EBUSY;
+
+ /* don't change address fields on monitor */
+ if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
+ return -EINVAL;
+
+ if (!info->attrs[NL802154_ATTR_SHORT_ADDR])
+ return -EINVAL;
+
+ short_addr = nla_get_u16(info->attrs[NL802154_ATTR_SHORT_ADDR]);
+
+ return rdev_set_short_addr(rdev, wpan_dev, short_addr);
+}
+
#define NL802154_FLAG_NEED_WPAN_PHY 0x01
#define NL802154_FLAG_NEED_NETDEV 0x02
#define NL802154_FLAG_NEED_RTNL 0x04
@@ -719,6 +742,14 @@ static const struct genl_ops nl802154_ops[] = {
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
+ {
+ .cmd = NL802154_CMD_SET_SHORT_ADDR,
+ .doit = nl802154_set_short_addr,
+ .policy = nl802154_policy,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = NL802154_FLAG_NEED_NETDEV |
+ NL802154_FLAG_NEED_RTNL,
+ },
};
/* initialisation/exit functions */
diff --git a/net/ieee802154/rdev-ops.h b/net/ieee802154/rdev-ops.h
index 4115ea2..16b0de0 100644
--- a/net/ieee802154/rdev-ops.h
+++ b/net/ieee802154/rdev-ops.h
@@ -34,4 +34,11 @@ rdev_set_pan_id(struct cfg802154_registered_device *rdev,
return rdev->ops->set_pan_id(&rdev->wpan_phy, wpan_dev, pan_id);
}
+static inline int
+rdev_set_short_addr(struct cfg802154_registered_device *rdev,
+ struct wpan_dev *wpan_dev, u16 short_addr)
+{
+ return rdev->ops->set_short_addr(&rdev->wpan_phy, wpan_dev, short_addr);
+}
+
#endif /* __CFG802154_RDEV_OPS */
diff --git a/net/mac802154/cfg.c b/net/mac802154/cfg.c
index db6e5e9..df29976 100644
--- a/net/mac802154/cfg.c
+++ b/net/mac802154/cfg.c
@@ -83,9 +83,35 @@ static int ieee802154_set_pan_id(struct wpan_phy *wpan_phy,
return 0;
}
+static int
+ieee802154_set_short_addr(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
+ const u16 short_addr)
+{
+ 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 == IEEE802154_ADDR_SHORT_UNSPEC ||
+ short_addr == IEEE802154_ADDR_SHORT_BROADCAST)
+ return -EINVAL;
+
+ wpan_dev->short_addr = cpu_to_le16(short_addr);
+ return 0;
+}
+
const struct cfg802154_ops mac802154_config_ops = {
.add_virtual_intf_deprecated = ieee802154_add_iface_deprecated,
.del_virtual_intf_deprecated = ieee802154_del_iface_deprecated,
.set_channel = ieee802154_set_channel,
.set_pan_id = ieee802154_set_pan_id,
+ .set_short_addr = ieee802154_set_short_addr,
};
--
2.1.3
--
To unsubscribe from this list: send the line "unsubscribe linux-wpan" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
