diff options
| -rw-r--r-- | include/net/cfg802154.h | 47 | ||||
| -rw-r--r-- | net/ieee802154/Makefile | 2 | ||||
| -rw-r--r-- | net/ieee802154/core.c | 2 | ||||
| -rw-r--r-- | net/ieee802154/pan.c | 63 |
4 files changed, 113 insertions, 1 deletions
diff --git a/include/net/cfg802154.h b/include/net/cfg802154.h index f79ce133e51a..a89f1c9cea3f 100644 --- a/include/net/cfg802154.h +++ b/include/net/cfg802154.h @@ -304,6 +304,22 @@ struct ieee802154_coord_desc { }; /** + * struct ieee802154_pan_device - PAN device information + * @pan_id: the PAN ID of this device + * @mode: the preferred mode to reach the device + * @short_addr: the short address of this device + * @extended_addr: the extended address of this device + * @node: the list node + */ +struct ieee802154_pan_device { + __le16 pan_id; + u8 mode; + __le16 short_addr; + __le64 extended_addr; + struct list_head node; +}; + +/** * struct cfg802154_scan_request - Scan request * * @type: type of scan to be performed @@ -478,6 +494,11 @@ struct wpan_dev { /* fallback for acknowledgment bit setting */ bool ackreq; + + /* Associations */ + struct mutex association_lock; + struct ieee802154_pan_device *parent; + struct list_head children; }; #define to_phy(_dev) container_of(_dev, struct wpan_phy, dev) @@ -529,4 +550,30 @@ static inline const char *wpan_phy_name(struct wpan_phy *phy) void ieee802154_configure_durations(struct wpan_phy *phy, unsigned int page, unsigned int channel); +/** + * cfg802154_device_is_associated - Checks whether we are associated to any device + * @wpan_dev: the wpan device + * @return: true if we are associated + */ +bool cfg802154_device_is_associated(struct wpan_dev *wpan_dev); + +/** + * cfg802154_device_is_parent - Checks if a device is our coordinator + * @wpan_dev: the wpan device + * @target: the expected parent + * @return: true if @target is our coordinator + */ +bool cfg802154_device_is_parent(struct wpan_dev *wpan_dev, + struct ieee802154_addr *target); + +/** + * cfg802154_device_is_child - Checks whether a device is associated to us + * @wpan_dev: the wpan device + * @target: the expected child + * @return: the PAN device + */ +struct ieee802154_pan_device * +cfg802154_device_is_child(struct wpan_dev *wpan_dev, + struct ieee802154_addr *target); + #endif /* __NET_CFG802154_H */ diff --git a/net/ieee802154/Makefile b/net/ieee802154/Makefile index f05b7bdae2aa..7bce67673e83 100644 --- a/net/ieee802154/Makefile +++ b/net/ieee802154/Makefile @@ -4,7 +4,7 @@ obj-$(CONFIG_IEEE802154_SOCKET) += ieee802154_socket.o obj-y += 6lowpan/ ieee802154-y := netlink.o nl-mac.o nl-phy.o nl_policy.o core.o \ - header_ops.o sysfs.o nl802154.o trace.o + header_ops.o sysfs.o nl802154.o trace.o pan.o ieee802154_socket-y := socket.o CFLAGS_trace.o := -I$(src) diff --git a/net/ieee802154/core.c b/net/ieee802154/core.c index 57546e07e06a..cd69bdbfd59f 100644 --- a/net/ieee802154/core.c +++ b/net/ieee802154/core.c @@ -276,6 +276,8 @@ static int cfg802154_netdev_notifier_call(struct notifier_block *nb, wpan_dev->identifier = ++rdev->wpan_dev_id; list_add_rcu(&wpan_dev->list, &rdev->wpan_dev_list); rdev->devlist_generation++; + mutex_init(&wpan_dev->association_lock); + INIT_LIST_HEAD(&wpan_dev->children); wpan_dev->netdev = dev; break; diff --git a/net/ieee802154/pan.c b/net/ieee802154/pan.c new file mode 100644 index 000000000000..2b30e7b19ac3 --- /dev/null +++ b/net/ieee802154/pan.c @@ -0,0 +1,63 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * IEEE 802.15.4 PAN management + * + * Copyright (C) 2023 Qorvo US, Inc + * Authors: + * - David Girault <david.girault@qorvo.com> + * - Miquel Raynal <miquel.raynal@bootlin.com> + */ + +#include <linux/kernel.h> +#include <net/cfg802154.h> +#include <net/af_ieee802154.h> + +/* Checks whether a device address matches one from the PAN list. + * This helper is meant to be used only during PAN management, when we expect + * extended addresses to be used. + */ +static bool cfg802154_pan_device_is_matching(struct ieee802154_pan_device *pan_dev, + struct ieee802154_addr *ext_dev) +{ + if (!pan_dev || !ext_dev) + return false; + + if (ext_dev->mode == IEEE802154_ADDR_SHORT) + return false; + + return pan_dev->extended_addr == ext_dev->extended_addr; +} + +bool cfg802154_device_is_associated(struct wpan_dev *wpan_dev) +{ + bool is_assoc; + + mutex_lock(&wpan_dev->association_lock); + is_assoc = !list_empty(&wpan_dev->children) || wpan_dev->parent; + mutex_unlock(&wpan_dev->association_lock); + + return is_assoc; +} + +bool cfg802154_device_is_parent(struct wpan_dev *wpan_dev, + struct ieee802154_addr *target) +{ + lockdep_assert_held(&wpan_dev->association_lock); + + return cfg802154_pan_device_is_matching(wpan_dev->parent, target); +} + +struct ieee802154_pan_device * +cfg802154_device_is_child(struct wpan_dev *wpan_dev, + struct ieee802154_addr *target) +{ + struct ieee802154_pan_device *child; + + lockdep_assert_held(&wpan_dev->association_lock); + + list_for_each_entry(child, &wpan_dev->children, node) + if (cfg802154_pan_device_is_matching(child, target)) + return child; + + return NULL; +} |