diff options
Diffstat (limited to 'net/mac802154/rx.c')
| -rw-r--r-- | net/mac802154/rx.c | 145 |
1 files changed, 137 insertions, 8 deletions
diff --git a/net/mac802154/rx.c b/net/mac802154/rx.c index c2aae2a6d6a6..aac359b5c71d 100644 --- a/net/mac802154/rx.c +++ b/net/mac802154/rx.c @@ -13,7 +13,7 @@ #include <linux/module.h> #include <linux/netdevice.h> #include <linux/crc-ccitt.h> -#include <asm/unaligned.h> +#include <linux/unaligned.h> #include <net/mac802154.h> #include <net/ieee802154_netdev.h> @@ -29,12 +29,112 @@ static int ieee802154_deliver_skb(struct sk_buff *skb) return netif_receive_skb(skb); } +void mac802154_rx_beacon_worker(struct work_struct *work) +{ + struct ieee802154_local *local = + container_of(work, struct ieee802154_local, rx_beacon_work); + struct cfg802154_mac_pkt *mac_pkt; + + mac_pkt = list_first_entry_or_null(&local->rx_beacon_list, + struct cfg802154_mac_pkt, node); + if (!mac_pkt) + return; + + mac802154_process_beacon(local, mac_pkt->skb, mac_pkt->page, mac_pkt->channel); + + list_del(&mac_pkt->node); + kfree_skb(mac_pkt->skb); + kfree(mac_pkt); +} + +static bool mac802154_should_answer_beacon_req(struct ieee802154_local *local) +{ + struct cfg802154_beacon_request *beacon_req; + unsigned int interval; + + rcu_read_lock(); + beacon_req = rcu_dereference(local->beacon_req); + if (!beacon_req) { + rcu_read_unlock(); + return false; + } + + interval = beacon_req->interval; + rcu_read_unlock(); + + if (!mac802154_is_beaconing(local)) + return false; + + return interval == IEEE802154_ACTIVE_SCAN_DURATION; +} + +void mac802154_rx_mac_cmd_worker(struct work_struct *work) +{ + struct ieee802154_local *local = + container_of(work, struct ieee802154_local, rx_mac_cmd_work); + struct cfg802154_mac_pkt *mac_pkt; + u8 mac_cmd; + int rc; + + mac_pkt = list_first_entry_or_null(&local->rx_mac_cmd_list, + struct cfg802154_mac_pkt, node); + if (!mac_pkt) + return; + + rc = ieee802154_get_mac_cmd(mac_pkt->skb, &mac_cmd); + if (rc) + goto out; + + switch (mac_cmd) { + case IEEE802154_CMD_BEACON_REQ: + dev_dbg(&mac_pkt->sdata->dev->dev, "processing BEACON REQ\n"); + if (!mac802154_should_answer_beacon_req(local)) + break; + + queue_delayed_work(local->mac_wq, &local->beacon_work, 0); + break; + + case IEEE802154_CMD_ASSOCIATION_RESP: + dev_dbg(&mac_pkt->sdata->dev->dev, "processing ASSOC RESP\n"); + if (!mac802154_is_associating(local)) + break; + + 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; + + case IEEE802154_CMD_DISASSOCIATION_NOTIFY: + dev_dbg(&mac_pkt->sdata->dev->dev, "processing DISASSOC NOTIF\n"); + if (mac_pkt->sdata->wpan_dev.iftype != NL802154_IFTYPE_COORD) + break; + + mac802154_process_disassociation_notif(mac_pkt->sdata, mac_pkt->skb); + break; + + default: + break; + } + +out: + list_del(&mac_pkt->node); + kfree_skb(mac_pkt->skb); + kfree(mac_pkt); +} + static int ieee802154_subif_frame(struct ieee802154_sub_if_data *sdata, struct sk_buff *skb, const struct ieee802154_hdr *hdr) { - struct wpan_dev *wpan_dev = &sdata->wpan_dev; struct wpan_phy *wpan_phy = sdata->local->hw.phy; + struct wpan_dev *wpan_dev = &sdata->wpan_dev; + struct cfg802154_mac_pkt *mac_pkt; __le16 span, sshort; int rc; @@ -56,12 +156,15 @@ ieee802154_subif_frame(struct ieee802154_sub_if_data *sdata, switch (mac_cb(skb)->dest.mode) { case IEEE802154_ADDR_NONE: - if (hdr->source.mode != IEEE802154_ADDR_NONE) - /* FIXME: check if we are PAN coordinator */ - skb->pkt_type = PACKET_OTHERHOST; - else + if (hdr->source.mode == IEEE802154_ADDR_NONE) /* ACK comes with both addresses empty */ skb->pkt_type = PACKET_HOST; + else if (!wpan_dev->parent) + /* No dest means PAN coordinator is the recipient */ + skb->pkt_type = PACKET_HOST; + else + /* We are not the PAN coordinator, just relaying */ + skb->pkt_type = PACKET_OTHERHOST; break; case IEEE802154_ADDR_LONG: if (mac_cb(skb)->dest.pan_id != span && @@ -106,8 +209,35 @@ ieee802154_subif_frame(struct ieee802154_sub_if_data *sdata, switch (mac_cb(skb)->type) { case IEEE802154_FC_TYPE_BEACON: - case IEEE802154_FC_TYPE_ACK: + dev_dbg(&sdata->dev->dev, "BEACON received\n"); + if (!mac802154_is_scanning(sdata->local)) + goto fail; + + mac_pkt = kzalloc(sizeof(*mac_pkt), GFP_ATOMIC); + if (!mac_pkt) + goto fail; + + mac_pkt->skb = skb_get(skb); + mac_pkt->sdata = sdata; + mac_pkt->page = sdata->local->scan_page; + mac_pkt->channel = sdata->local->scan_channel; + list_add_tail(&mac_pkt->node, &sdata->local->rx_beacon_list); + queue_work(sdata->local->mac_wq, &sdata->local->rx_beacon_work); + return NET_RX_SUCCESS; + case IEEE802154_FC_TYPE_MAC_CMD: + dev_dbg(&sdata->dev->dev, "MAC COMMAND received\n"); + mac_pkt = kzalloc(sizeof(*mac_pkt), GFP_ATOMIC); + if (!mac_pkt) + goto fail; + + mac_pkt->skb = skb_get(skb); + mac_pkt->sdata = sdata; + list_add_tail(&mac_pkt->node, &sdata->local->rx_mac_cmd_list); + queue_work(sdata->local->mac_wq, &sdata->local->rx_mac_cmd_work); + return NET_RX_SUCCESS; + + case IEEE802154_FC_TYPE_ACK: goto fail; case IEEE802154_FC_TYPE_DATA: @@ -213,7 +343,6 @@ __ieee802154_rx_handle_packet(struct ieee802154_local *local, ret = ieee802154_parse_frame_start(skb, &hdr); if (ret) { pr_debug("got invalid frame\n"); - kfree_skb(skb); return; } |