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-rw-r--r--include/net/cfg802154.h7
-rw-r--r--include/net/ieee802154_netdev.h6
-rw-r--r--net/ieee802154/core.c7
-rw-r--r--net/ieee802154/pan.c30
-rw-r--r--net/mac802154/ieee802154_i.h2
-rw-r--r--net/mac802154/rx.c8
-rw-r--r--net/mac802154/scan.c142
7 files changed, 202 insertions, 0 deletions
diff --git a/include/net/cfg802154.h b/include/net/cfg802154.h
index 9b036ab20079..c844ae63bc04 100644
--- a/include/net/cfg802154.h
+++ b/include/net/cfg802154.h
@@ -583,4 +583,11 @@ struct ieee802154_pan_device *
cfg802154_device_is_child(struct wpan_dev *wpan_dev,
struct ieee802154_addr *target);
+/**
+ * cfg802154_get_free_short_addr - Get a free address among the known devices
+ * @wpan_dev: the wpan device
+ * @return: a random short address expectedly unused on our PAN
+ */
+__le16 cfg802154_get_free_short_addr(struct wpan_dev *wpan_dev);
+
#endif /* __NET_CFG802154_H */
diff --git a/include/net/ieee802154_netdev.h b/include/net/ieee802154_netdev.h
index 16194356cfe7..4de858f9929e 100644
--- a/include/net/ieee802154_netdev.h
+++ b/include/net/ieee802154_netdev.h
@@ -211,6 +211,12 @@ struct ieee802154_association_req_frame {
struct ieee802154_assoc_req_pl assoc_req_pl;
};
+struct ieee802154_association_resp_frame {
+ struct ieee802154_hdr mhr;
+ struct ieee802154_mac_cmd_pl mac_pl;
+ struct ieee802154_assoc_resp_pl assoc_resp_pl;
+};
+
struct ieee802154_disassociation_notif_frame {
struct ieee802154_hdr mhr;
struct ieee802154_mac_cmd_pl mac_pl;
diff --git a/net/ieee802154/core.c b/net/ieee802154/core.c
index a08d75dd56ad..1670a71327a7 100644
--- a/net/ieee802154/core.c
+++ b/net/ieee802154/core.c
@@ -200,11 +200,18 @@ EXPORT_SYMBOL(wpan_phy_free);
static void cfg802154_free_peer_structures(struct wpan_dev *wpan_dev)
{
+ struct ieee802154_pan_device *child, *tmp;
+
mutex_lock(&wpan_dev->association_lock);
kfree(wpan_dev->parent);
wpan_dev->parent = NULL;
+ list_for_each_entry_safe(child, tmp, &wpan_dev->children, node) {
+ list_del(&child->node);
+ kfree(child);
+ }
+
mutex_unlock(&wpan_dev->association_lock);
}
diff --git a/net/ieee802154/pan.c b/net/ieee802154/pan.c
index 43b8d2df2186..545461069197 100644
--- a/net/ieee802154/pan.c
+++ b/net/ieee802154/pan.c
@@ -63,3 +63,33 @@ cfg802154_device_is_child(struct wpan_dev *wpan_dev,
return NULL;
}
EXPORT_SYMBOL_GPL(cfg802154_device_is_child);
+
+__le16 cfg802154_get_free_short_addr(struct wpan_dev *wpan_dev)
+{
+ struct ieee802154_pan_device *child;
+ __le16 addr;
+
+ lockdep_assert_held(&wpan_dev->association_lock);
+
+ do {
+ get_random_bytes(&addr, 2);
+ if (addr == cpu_to_le16(IEEE802154_ADDR_SHORT_BROADCAST) ||
+ addr == cpu_to_le16(IEEE802154_ADDR_SHORT_UNSPEC))
+ continue;
+
+ if (wpan_dev->short_addr == addr)
+ continue;
+
+ if (wpan_dev->parent && wpan_dev->parent->short_addr == addr)
+ continue;
+
+ list_for_each_entry(child, &wpan_dev->children, node)
+ if (child->short_addr == addr)
+ continue;
+
+ break;
+ } while (1);
+
+ return addr;
+}
+EXPORT_SYMBOL_GPL(cfg802154_get_free_short_addr);
diff --git a/net/mac802154/ieee802154_i.h b/net/mac802154/ieee802154_i.h
index 92252f86c69c..432bfa87249e 100644
--- a/net/mac802154/ieee802154_i.h
+++ b/net/mac802154/ieee802154_i.h
@@ -318,6 +318,8 @@ static inline bool mac802154_is_associating(struct ieee802154_local *local)
int mac802154_send_disassociation_notif(struct ieee802154_sub_if_data *sdata,
struct ieee802154_pan_device *target,
u8 reason);
+int mac802154_process_association_req(struct ieee802154_sub_if_data *sdata,
+ struct sk_buff *skb);
/* interface handling */
int ieee802154_iface_init(void);
diff --git a/net/mac802154/rx.c b/net/mac802154/rx.c
index d0e08613a36b..96040b63a4fc 100644
--- a/net/mac802154/rx.c
+++ b/net/mac802154/rx.c
@@ -102,6 +102,14 @@ void mac802154_rx_mac_cmd_worker(struct work_struct *work)
mac802154_process_association_resp(mac_pkt->sdata, mac_pkt->skb);
break;
+ case IEEE802154_CMD_ASSOCIATION_REQ:
+ dev_dbg(&mac_pkt->sdata->dev->dev, "processing ASSOC REQ\n");
+ if (mac_pkt->sdata->wpan_dev.iftype != NL802154_IFTYPE_COORD)
+ break;
+
+ mac802154_process_association_req(mac_pkt->sdata, mac_pkt->skb);
+ break;
+
default:
break;
}
diff --git a/net/mac802154/scan.c b/net/mac802154/scan.c
index e2f2e1235ec6..d5f66c204bc5 100644
--- a/net/mac802154/scan.c
+++ b/net/mac802154/scan.c
@@ -697,3 +697,145 @@ int mac802154_send_disassociation_notif(struct ieee802154_sub_if_data *sdata,
dev_dbg(&sdata->dev->dev, "DISASSOC ACK received from %8phC\n", &teaddr);
return 0;
}
+
+static int
+mac802154_send_association_resp_locked(struct ieee802154_sub_if_data *sdata,
+ struct ieee802154_pan_device *target,
+ struct ieee802154_assoc_resp_pl *assoc_resp_pl)
+{
+ u64 teaddr = swab64((__force u64)target->extended_addr);
+ struct ieee802154_association_resp_frame frame = {};
+ struct ieee802154_local *local = sdata->local;
+ struct wpan_dev *wpan_dev = &sdata->wpan_dev;
+ struct sk_buff *skb;
+ int ret;
+
+ frame.mhr.fc.type = IEEE802154_FC_TYPE_MAC_CMD;
+ frame.mhr.fc.security_enabled = 0;
+ frame.mhr.fc.frame_pending = 0;
+ frame.mhr.fc.ack_request = 1; /* We always expect an ack here */
+ frame.mhr.fc.intra_pan = 1;
+ frame.mhr.fc.dest_addr_mode = IEEE802154_EXTENDED_ADDRESSING;
+ frame.mhr.fc.version = IEEE802154_2003_STD;
+ frame.mhr.fc.source_addr_mode = IEEE802154_EXTENDED_ADDRESSING;
+ frame.mhr.source.mode = IEEE802154_ADDR_LONG;
+ frame.mhr.source.extended_addr = wpan_dev->extended_addr;
+ frame.mhr.dest.mode = IEEE802154_ADDR_LONG;
+ frame.mhr.dest.pan_id = wpan_dev->pan_id;
+ frame.mhr.dest.extended_addr = target->extended_addr;
+ frame.mhr.seq = atomic_inc_return(&wpan_dev->dsn) & 0xFF;
+ frame.mac_pl.cmd_id = IEEE802154_CMD_ASSOCIATION_RESP;
+
+ skb = alloc_skb(IEEE802154_MAC_CMD_SKB_SZ + sizeof(*assoc_resp_pl),
+ GFP_KERNEL);
+ if (!skb)
+ return -ENOBUFS;
+
+ skb->dev = sdata->dev;
+
+ ret = ieee802154_mac_cmd_push(skb, &frame, assoc_resp_pl,
+ sizeof(*assoc_resp_pl));
+ if (ret) {
+ kfree_skb(skb);
+ return ret;
+ }
+
+ ret = ieee802154_mlme_tx_locked(local, sdata, skb);
+ if (ret) {
+ dev_warn(&sdata->dev->dev,
+ "No ASSOC RESP ACK received from %8phC\n", &teaddr);
+ if (ret > 0)
+ ret = (ret == IEEE802154_NO_ACK) ? -EREMOTEIO : -EIO;
+ return ret;
+ }
+
+ return 0;
+}
+
+int mac802154_process_association_req(struct ieee802154_sub_if_data *sdata,
+ struct sk_buff *skb)
+{
+ struct wpan_dev *wpan_dev = &sdata->wpan_dev;
+ struct ieee802154_addr *src = &mac_cb(skb)->source;
+ struct ieee802154_addr *dest = &mac_cb(skb)->dest;
+ struct ieee802154_assoc_resp_pl assoc_resp_pl = {};
+ struct ieee802154_assoc_req_pl assoc_req_pl;
+ struct ieee802154_pan_device *child, *exchild;
+ struct ieee802154_addr tmp = {};
+ u64 ceaddr;
+ int ret;
+
+ if (skb->len != sizeof(assoc_req_pl))
+ return -EINVAL;
+
+ if (unlikely(src->mode != IEEE802154_EXTENDED_ADDRESSING))
+ return -EINVAL;
+
+ if (unlikely(dest->pan_id != wpan_dev->pan_id))
+ return -ENODEV;
+
+ if (dest->mode == IEEE802154_EXTENDED_ADDRESSING &&
+ unlikely(dest->extended_addr != wpan_dev->extended_addr))
+ return -ENODEV;
+ else if (dest->mode == IEEE802154_SHORT_ADDRESSING &&
+ unlikely(dest->short_addr != wpan_dev->short_addr))
+ return -ENODEV;
+
+ mutex_lock(&wpan_dev->association_lock);
+
+ memcpy(&assoc_req_pl, skb->data, sizeof(assoc_req_pl));
+ if (assoc_req_pl.assoc_type) {
+ dev_err(&skb->dev->dev, "Fast associations not supported yet\n");
+ ret = -EOPNOTSUPP;
+ goto unlock;
+ }
+
+ child = kzalloc(sizeof(*child), GFP_KERNEL);
+ if (!child) {
+ ret = -ENOMEM;
+ goto unlock;
+ }
+
+ child->extended_addr = src->extended_addr;
+ child->mode = IEEE802154_EXTENDED_ADDRESSING;
+ ceaddr = swab64((__force u64)child->extended_addr);
+
+ assoc_resp_pl.status = IEEE802154_ASSOCIATION_SUCCESSFUL;
+ if (assoc_req_pl.alloc_addr) {
+ assoc_resp_pl.short_addr = cfg802154_get_free_short_addr(wpan_dev);
+ child->mode = IEEE802154_SHORT_ADDRESSING;
+ } else {
+ assoc_resp_pl.short_addr = cpu_to_le16(IEEE802154_ADDR_SHORT_UNSPEC);
+ }
+ child->short_addr = assoc_resp_pl.short_addr;
+ dev_dbg(&sdata->dev->dev,
+ "Accepting ASSOC REQ from child %8phC, providing short address 0x%04x\n",
+ &ceaddr, le16_to_cpu(child->short_addr));
+
+ ret = mac802154_send_association_resp_locked(sdata, child, &assoc_resp_pl);
+ if (ret) {
+ kfree(child);
+ goto unlock;
+ }
+
+ dev_dbg(&sdata->dev->dev,
+ "Successful association with new child %8phC\n", &ceaddr);
+
+ /* Ensure this child is not already associated (might happen due to
+ * retransmissions), in this case drop the ex structure.
+ */
+ tmp.mode = child->mode;
+ tmp.extended_addr = child->extended_addr;
+ exchild = cfg802154_device_is_child(wpan_dev, &tmp);
+ if (exchild) {
+ dev_dbg(&sdata->dev->dev,
+ "Child %8phC was already known\n", &ceaddr);
+ list_del(&exchild->node);
+ }
+
+ list_add(&child->node, &wpan_dev->children);
+
+unlock:
+ mutex_unlock(&wpan_dev->association_lock);
+ return ret;
+}
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-11-22 05:46:50 +0000