[linux-2.6-block.git] / net / mac802154 / rx.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2007-2012 Siemens AG
 *
 * Written by:
 * Pavel Smolenskiy <pavel.smolenskiy@gmail.com>
 * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/crc-ccitt.h>
#include <asm/unaligned.h>

#include <net/mac802154.h>
#include <net/ieee802154_netdev.h>
#include <net/nl802154.h>

#include "ieee802154_i.h"

static int ieee802154_deliver_skb(struct sk_buff *skb)
{
	skb->ip_summed = CHECKSUM_UNNECESSARY;
	skb->protocol = htons(ETH_P_IEEE802154);

	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;

	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_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;

	pr_debug("getting packet via slave interface %s\n", sdata->dev->name);

	span = wpan_dev->pan_id;
	sshort = wpan_dev->short_addr;

	/* Level 3 filtering: Only beacons are accepted during scans */
	if (sdata->required_filtering == IEEE802154_FILTERING_3_SCAN &&
	    sdata->required_filtering > wpan_phy->filtering) {
		if (mac_cb(skb)->type != IEEE802154_FC_TYPE_BEACON) {
			dev_dbg(&sdata->dev->dev,
				"drop non-beacon frame (0x%x) during scan\n",
				mac_cb(skb)->type);
			goto fail;
		}
	}

	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
			/* ACK comes with both addresses empty */
			skb->pkt_type = PACKET_HOST;
		break;
	case IEEE802154_ADDR_LONG:
		if (mac_cb(skb)->dest.pan_id != span &&
		    mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
			skb->pkt_type = PACKET_OTHERHOST;
		else if (mac_cb(skb)->dest.extended_addr == wpan_dev->extended_addr)
			skb->pkt_type = PACKET_HOST;
		else
			skb->pkt_type = PACKET_OTHERHOST;
		break;
	case IEEE802154_ADDR_SHORT:
		if (mac_cb(skb)->dest.pan_id != span &&
		    mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
			skb->pkt_type = PACKET_OTHERHOST;
		else if (mac_cb(skb)->dest.short_addr == sshort)
			skb->pkt_type = PACKET_HOST;
		else if (mac_cb(skb)->dest.short_addr ==
			  cpu_to_le16(IEEE802154_ADDR_BROADCAST))
			skb->pkt_type = PACKET_BROADCAST;
		else
			skb->pkt_type = PACKET_OTHERHOST;
		break;
	default:
		pr_debug("invalid dest mode\n");
		goto fail;
	}

	skb->dev = sdata->dev;

	/* TODO this should be moved after netif_receive_skb call, otherwise
	 * wireshark will show a mac header with security fields and the
	 * payload is already decrypted.
	 */
	rc = mac802154_llsec_decrypt(&sdata->sec, skb);
	if (rc) {
		pr_debug("decryption failed: %i\n", rc);
		goto fail;
	}

	sdata->dev->stats.rx_packets++;
	sdata->dev->stats.rx_bytes += skb->len;

	switch (mac_cb(skb)->type) {
	case IEEE802154_FC_TYPE_BEACON:
		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:
		return ieee802154_deliver_skb(skb);
	default:
		pr_warn_ratelimited("ieee802154: bad frame received "
				    "(type = %d)\n", mac_cb(skb)->type);
		goto fail;
	}

fail:
	kfree_skb(skb);
	return NET_RX_DROP;
}

static void
ieee802154_print_addr(const char *name, const struct ieee802154_addr *addr)
{
	if (addr->mode == IEEE802154_ADDR_NONE) {
		pr_debug("%s not present\n", name);
		return;
	}

	pr_debug("%s PAN ID: %04x\n", name, le16_to_cpu(addr->pan_id));
	if (addr->mode == IEEE802154_ADDR_SHORT) {
		pr_debug("%s is short: %04x\n", name,
			 le16_to_cpu(addr->short_addr));
	} else {
		u64 hw = swab64((__force u64)addr->extended_addr);

		pr_debug("%s is hardware: %8phC\n", name, &hw);
	}
}

static int
ieee802154_parse_frame_start(struct sk_buff *skb, struct ieee802154_hdr *hdr)
{
	int hlen;
	struct ieee802154_mac_cb *cb = mac_cb(skb);

	skb_reset_mac_header(skb);

	hlen = ieee802154_hdr_pull(skb, hdr);
	if (hlen < 0)
		return -EINVAL;

	skb->mac_len = hlen;

	pr_debug("fc: %04x dsn: %02x\n", le16_to_cpup((__le16 *)&hdr->fc),
		 hdr->seq);

	cb->type = hdr->fc.type;
	cb->ackreq = hdr->fc.ack_request;
	cb->secen = hdr->fc.security_enabled;

	ieee802154_print_addr("destination", &hdr->dest);
	ieee802154_print_addr("source", &hdr->source);

	cb->source = hdr->source;
	cb->dest = hdr->dest;

	if (hdr->fc.security_enabled) {
		u64 key;

		pr_debug("seclevel %i\n", hdr->sec.level);

		switch (hdr->sec.key_id_mode) {
		case IEEE802154_SCF_KEY_IMPLICIT:
			pr_debug("implicit key\n");
			break;

		case IEEE802154_SCF_KEY_INDEX:
			pr_debug("key %02x\n", hdr->sec.key_id);
			break;

		case IEEE802154_SCF_KEY_SHORT_INDEX:
			pr_debug("key %04x:%04x %02x\n",
				 le32_to_cpu(hdr->sec.short_src) >> 16,
				 le32_to_cpu(hdr->sec.short_src) & 0xffff,
				 hdr->sec.key_id);
			break;

		case IEEE802154_SCF_KEY_HW_INDEX:
			key = swab64((__force u64)hdr->sec.extended_src);
			pr_debug("key source %8phC %02x\n", &key,
				 hdr->sec.key_id);
			break;
		}
	}

	return 0;
}

static void
__ieee802154_rx_handle_packet(struct ieee802154_local *local,
			      struct sk_buff *skb)
{
	int ret;
	struct ieee802154_sub_if_data *sdata;
	struct ieee802154_hdr hdr;
	struct sk_buff *skb2;

	ret = ieee802154_parse_frame_start(skb, &hdr);
	if (ret) {
		pr_debug("got invalid frame\n");
		return;
	}

	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		if (sdata->wpan_dev.iftype == NL802154_IFTYPE_MONITOR)
			continue;

		if (!ieee802154_sdata_running(sdata))
			continue;

		/* Do not deliver packets received on interfaces expecting
		 * AACK=1 if the address filters where disabled.
		 */
		if (local->hw.phy->filtering < IEEE802154_FILTERING_4_FRAME_FIELDS &&
		    sdata->required_filtering == IEEE802154_FILTERING_4_FRAME_FIELDS)
			continue;

		skb2 = skb_clone(skb, GFP_ATOMIC);
		if (skb2) {
			skb2->dev = sdata->dev;
			ieee802154_subif_frame(sdata, skb2, &hdr);
		}
	}
}

static void
ieee802154_monitors_rx(struct ieee802154_local *local, struct sk_buff *skb)
{
	struct sk_buff *skb2;
	struct ieee802154_sub_if_data *sdata;

	skb_reset_mac_header(skb);
	skb->ip_summed = CHECKSUM_UNNECESSARY;
	skb->pkt_type = PACKET_OTHERHOST;
	skb->protocol = htons(ETH_P_IEEE802154);

	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		if (sdata->wpan_dev.iftype != NL802154_IFTYPE_MONITOR)
			continue;

		if (!ieee802154_sdata_running(sdata))
			continue;

		skb2 = skb_clone(skb, GFP_ATOMIC);
		if (skb2) {
			skb2->dev = sdata->dev;
			ieee802154_deliver_skb(skb2);

			sdata->dev->stats.rx_packets++;
			sdata->dev->stats.rx_bytes += skb->len;
		}
	}
}

void ieee802154_rx(struct ieee802154_local *local, struct sk_buff *skb)
{
	u16 crc;

	WARN_ON_ONCE(softirq_count() == 0);

	if (local->suspended)
		goto free_skb;

	/* TODO: When a transceiver omits the checksum here, we
	 * add an own calculated one. This is currently an ugly
	 * solution because the monitor needs a crc here.
	 */
	if (local->hw.flags & IEEE802154_HW_RX_OMIT_CKSUM) {
		crc = crc_ccitt(0, skb->data, skb->len);
		put_unaligned_le16(crc, skb_put(skb, 2));
	}

	rcu_read_lock();

	ieee802154_monitors_rx(local, skb);

	/* Level 1 filtering: Check the FCS by software when relevant */
	if (local->hw.phy->filtering == IEEE802154_FILTERING_NONE) {
		crc = crc_ccitt(0, skb->data, skb->len);
		if (crc)
			goto drop;
	}
	/* remove crc */
	skb_trim(skb, skb->len - 2);

	__ieee802154_rx_handle_packet(local, skb);

drop:
	rcu_read_unlock();
free_skb:
	kfree_skb(skb);
}

void
ieee802154_rx_irqsafe(struct ieee802154_hw *hw, struct sk_buff *skb, u8 lqi)
{
	struct ieee802154_local *local = hw_to_local(hw);
	struct ieee802154_mac_cb *cb = mac_cb_init(skb);

	cb->lqi = lqi;
	skb->pkt_type = IEEE802154_RX_MSG;
	skb_queue_tail(&local->skb_queue, skb);
	tasklet_schedule(&local->tasklet);
}
EXPORT_SYMBOL(ieee802154_rx_irqsafe);
Commit	Line	Data
1802d0be	1	// SPDX-License-Identifier: GPL-2.0-only
1cd829c8	2	/*
	3	* Copyright (C) 2007-2012 Siemens AG
	4	*
1cd829c8	5	* Written by:
	6	* Pavel Smolenskiy <pavel.smolenskiy@gmail.com>
	7	* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
	8	* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
	9	* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
	10	*/
	11
	12	#include <linux/kernel.h>
	13	#include <linux/module.h>
1cd829c8	14	#include <linux/netdevice.h>
1cd829c8	15	#include <linux/crc-ccitt.h>
b7889497	16	#include <asm/unaligned.h>
1cd829c8	17
	18	#include <net/mac802154.h>
	19	#include <net/ieee802154_netdev.h>
944742a3	20	#include <net/nl802154.h>
1cd829c8	21
0f1556bc	22	#include "ieee802154_i.h"
1cd829c8	23
08c511a7	24	static int ieee802154_deliver_skb(struct sk_buff *skb)
2a9820c9	25	{
75a46f0e	26	skb->ip_summed = CHECKSUM_UNNECESSARY;
702dcf99 AA	27	skb->protocol = htons(ETH_P_IEEE802154);
702dcf99 AA	28
2a9820c9 AA	29	return netif_receive_skb(skb);
	30	}
	31
57588c71 MR	32	void mac802154_rx_beacon_worker(struct work_struct *work)
	33	{
	34	struct ieee802154_local *local =
	35	container_of(work, struct ieee802154_local, rx_beacon_work);
	36	struct cfg802154_mac_pkt *mac_pkt;
	37
	38	mac_pkt = list_first_entry_or_null(&local->rx_beacon_list,
	39	struct cfg802154_mac_pkt, node);
	40	if (!mac_pkt)
	41	return;
	42
	43	mac802154_process_beacon(local, mac_pkt->skb, mac_pkt->page, mac_pkt->channel);
	44
	45	list_del(&mac_pkt->node);
	46	kfree_skb(mac_pkt->skb);
	47	kfree(mac_pkt);
	48	}
	49
d021d218 MR	50	static bool mac802154_should_answer_beacon_req(struct ieee802154_local *local)
	51	{
	52	struct cfg802154_beacon_request *beacon_req;
	53	unsigned int interval;
	54
	55	rcu_read_lock();
	56	beacon_req = rcu_dereference(local->beacon_req);
	57	if (!beacon_req) {
	58	rcu_read_unlock();
	59	return false;
	60	}
	61
	62	interval = beacon_req->interval;
	63	rcu_read_unlock();
	64
	65	if (!mac802154_is_beaconing(local))
	66	return false;
	67
	68	return interval == IEEE802154_ACTIVE_SCAN_DURATION;
	69	}
	70
	71	void mac802154_rx_mac_cmd_worker(struct work_struct *work)
	72	{
	73	struct ieee802154_local *local =
	74	container_of(work, struct ieee802154_local, rx_mac_cmd_work);
	75	struct cfg802154_mac_pkt *mac_pkt;
	76	u8 mac_cmd;
	77	int rc;
	78
	79	mac_pkt = list_first_entry_or_null(&local->rx_mac_cmd_list,
	80	struct cfg802154_mac_pkt, node);
	81	if (!mac_pkt)
	82	return;
	83
	84	rc = ieee802154_get_mac_cmd(mac_pkt->skb, &mac_cmd);
	85	if (rc)
	86	goto out;
	87
	88	switch (mac_cmd) {
	89	case IEEE802154_CMD_BEACON_REQ:
	90	dev_dbg(&mac_pkt->sdata->dev->dev, "processing BEACON REQ\n");
	91	if (!mac802154_should_answer_beacon_req(local))
	92	break;
	93
	94	queue_delayed_work(local->mac_wq, &local->beacon_work, 0);
	95	break;
fefd1980 MR	96
	97	case IEEE802154_CMD_ASSOCIATION_RESP:
	98	dev_dbg(&mac_pkt->sdata->dev->dev, "processing ASSOC RESP\n");
	99	if (!mac802154_is_associating(local))
	100	break;
	101
	102	mac802154_process_association_resp(mac_pkt->sdata, mac_pkt->skb);
	103	break;
	104
601f160b MR	105	case IEEE802154_CMD_ASSOCIATION_REQ:
	106	dev_dbg(&mac_pkt->sdata->dev->dev, "processing ASSOC REQ\n");
	107	if (mac_pkt->sdata->wpan_dev.iftype != NL802154_IFTYPE_COORD)
	108	break;
	109
	110	mac802154_process_association_req(mac_pkt->sdata, mac_pkt->skb);
	111	break;
	112
d021d218 MR	113	default:
	114	break;
	115	}
	116
	117	out:
	118	list_del(&mac_pkt->node);
	119	kfree_skb(mac_pkt->skb);
	120	kfree(mac_pkt);
	121	}
	122
2a9820c9	123	static int
be9d215f AA	124	ieee802154_subif_frame(struct ieee802154_sub_if_data *sdata,
be9d215f AA	125	struct sk_buff skb, const struct ieee802154_hdr hdr)
2a9820c9	126	{
4161634b	127	struct wpan_phy *wpan_phy = sdata->local->hw.phy;
57588c71 MR	128	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
57588c71 MR	129	struct cfg802154_mac_pkt *mac_pkt;
2a9820c9 AA	130	__le16 span, sshort;
	131	int rc;
	132
	133	pr_debug("getting packet via slave interface %s\n", sdata->dev->name);
	134
863e88f2 AA	135	span = wpan_dev->pan_id;
863e88f2 AA	136	sshort = wpan_dev->short_addr;
2a9820c9	137
4161634b MR	138	/* Level 3 filtering: Only beacons are accepted during scans */
	139	if (sdata->required_filtering == IEEE802154_FILTERING_3_SCAN &&
	140	sdata->required_filtering > wpan_phy->filtering) {
	141	if (mac_cb(skb)->type != IEEE802154_FC_TYPE_BEACON) {
	142	dev_dbg(&sdata->dev->dev,
	143	"drop non-beacon frame (0x%x) during scan\n",
	144	mac_cb(skb)->type);
	145	goto fail;
	146	}
	147	}
	148
2a9820c9 AA	149	switch (mac_cb(skb)->dest.mode) {
2a9820c9 AA	150	case IEEE802154_ADDR_NONE:
f0da4711	151	if (hdr->source.mode != IEEE802154_ADDR_NONE)
2a9820c9 AA	152	/* FIXME: check if we are PAN coordinator */
	153	skb->pkt_type = PACKET_OTHERHOST;
	154	else
	155	/* ACK comes with both addresses empty */
	156	skb->pkt_type = PACKET_HOST;
	157	break;
	158	case IEEE802154_ADDR_LONG:
	159	if (mac_cb(skb)->dest.pan_id != span &&
	160	mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
	161	skb->pkt_type = PACKET_OTHERHOST;
863e88f2	162	else if (mac_cb(skb)->dest.extended_addr == wpan_dev->extended_addr)
2a9820c9 AA	163	skb->pkt_type = PACKET_HOST;
	164	else
	165	skb->pkt_type = PACKET_OTHERHOST;
	166	break;
	167	case IEEE802154_ADDR_SHORT:
	168	if (mac_cb(skb)->dest.pan_id != span &&
	169	mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
	170	skb->pkt_type = PACKET_OTHERHOST;
	171	else if (mac_cb(skb)->dest.short_addr == sshort)
	172	skb->pkt_type = PACKET_HOST;
	173	else if (mac_cb(skb)->dest.short_addr ==
	174	cpu_to_le16(IEEE802154_ADDR_BROADCAST))
	175	skb->pkt_type = PACKET_BROADCAST;
	176	else
	177	skb->pkt_type = PACKET_OTHERHOST;
	178	break;
	179	default:
2a9820c9	180	pr_debug("invalid dest mode\n");
bcb47aab	181	goto fail;
2a9820c9 AA	182	}
2a9820c9 AA	183
2a9820c9 AA	184	skb->dev = sdata->dev;
2a9820c9 AA	185
d58a2fa9 AA	186	/* TODO this should be moved after netif_receive_skb call, otherwise
	187	* wireshark will show a mac header with security fields and the
	188	* payload is already decrypted.
	189	*/
2a9820c9 AA	190	rc = mac802154_llsec_decrypt(&sdata->sec, skb);
	191	if (rc) {
	192	pr_debug("decryption failed: %i\n", rc);
	193	goto fail;
	194	}
	195
	196	sdata->dev->stats.rx_packets++;
	197	sdata->dev->stats.rx_bytes += skb->len;
	198
	199	switch (mac_cb(skb)->type) {
ca1de81a	200	case IEEE802154_FC_TYPE_BEACON:
57588c71 MR	201	dev_dbg(&sdata->dev->dev, "BEACON received\n");
	202	if (!mac802154_is_scanning(sdata->local))
	203	goto fail;
	204
	205	mac_pkt = kzalloc(sizeof(*mac_pkt), GFP_ATOMIC);
	206	if (!mac_pkt)
	207	goto fail;
	208
	209	mac_pkt->skb = skb_get(skb);
	210	mac_pkt->sdata = sdata;
	211	mac_pkt->page = sdata->local->scan_page;
	212	mac_pkt->channel = sdata->local->scan_channel;
	213	list_add_tail(&mac_pkt->node, &sdata->local->rx_beacon_list);
	214	queue_work(sdata->local->mac_wq, &sdata->local->rx_beacon_work);
	215	return NET_RX_SUCCESS;
d021d218	216
ca1de81a	217	case IEEE802154_FC_TYPE_MAC_CMD:
d021d218 MR	218	dev_dbg(&sdata->dev->dev, "MAC COMMAND received\n");
	219	mac_pkt = kzalloc(sizeof(*mac_pkt), GFP_ATOMIC);
	220	if (!mac_pkt)
	221	goto fail;
	222
	223	mac_pkt->skb = skb_get(skb);
	224	mac_pkt->sdata = sdata;
	225	list_add_tail(&mac_pkt->node, &sdata->local->rx_mac_cmd_list);
	226	queue_work(sdata->local->mac_wq, &sdata->local->rx_mac_cmd_work);
	227	return NET_RX_SUCCESS;
	228
	229	case IEEE802154_FC_TYPE_ACK:
ca1de81a AR	230	goto fail;
ca1de81a AR	231
2a9820c9	232	case IEEE802154_FC_TYPE_DATA:
08c511a7	233	return ieee802154_deliver_skb(skb);
2a9820c9	234	default:
bd89bb6d AR	235	pr_warn_ratelimited("ieee802154: bad frame received "
bd89bb6d AR	236	"(type = %d)\n", mac_cb(skb)->type);
2a9820c9 AA	237	goto fail;
	238	}
	239
	240	fail:
	241	kfree_skb(skb);
	242	return NET_RX_DROP;
	243	}
	244
be9d215f AA	245	static void
be9d215f AA	246	ieee802154_print_addr(const char name, const struct ieee802154_addr addr)
2a9820c9	247	{
3a22550a	248	if (addr->mode == IEEE802154_ADDR_NONE) {
2a9820c9	249	pr_debug("%s not present\n", name);
3a22550a MR	250	return;
3a22550a MR	251	}
2a9820c9 AA	252
	253	pr_debug("%s PAN ID: %04x\n", name, le16_to_cpu(addr->pan_id));
	254	if (addr->mode == IEEE802154_ADDR_SHORT) {
	255	pr_debug("%s is short: %04x\n", name,
	256	le16_to_cpu(addr->short_addr));
	257	} else {
	258	u64 hw = swab64((__force u64)addr->extended_addr);
	259
	260	pr_debug("%s is hardware: %8phC\n", name, &hw);
	261	}
	262	}
	263
be9d215f AA	264	static int
be9d215f AA	265	ieee802154_parse_frame_start(struct sk_buff skb, struct ieee802154_hdr hdr)
2a9820c9 AA	266	{
2a9820c9 AA	267	int hlen;
5a5c4e06	268	struct ieee802154_mac_cb *cb = mac_cb(skb);
2a9820c9	269
9cf215d0 AA	270	skb_reset_mac_header(skb);
9cf215d0 AA	271
2a9820c9 AA	272	hlen = ieee802154_hdr_pull(skb, hdr);
	273	if (hlen < 0)
	274	return -EINVAL;
	275
	276	skb->mac_len = hlen;
	277
	278	pr_debug("fc: %04x dsn: %02x\n", le16_to_cpup((__le16 *)&hdr->fc),
	279	hdr->seq);
	280
	281	cb->type = hdr->fc.type;
	282	cb->ackreq = hdr->fc.ack_request;
	283	cb->secen = hdr->fc.security_enabled;
	284
be9d215f AA	285	ieee802154_print_addr("destination", &hdr->dest);
be9d215f AA	286	ieee802154_print_addr("source", &hdr->source);
2a9820c9 AA	287
	288	cb->source = hdr->source;
	289	cb->dest = hdr->dest;
	290
	291	if (hdr->fc.security_enabled) {
	292	u64 key;
	293
	294	pr_debug("seclevel %i\n", hdr->sec.level);
	295
	296	switch (hdr->sec.key_id_mode) {
	297	case IEEE802154_SCF_KEY_IMPLICIT:
	298	pr_debug("implicit key\n");
	299	break;
	300
	301	case IEEE802154_SCF_KEY_INDEX:
	302	pr_debug("key %02x\n", hdr->sec.key_id);
	303	break;
	304
	305	case IEEE802154_SCF_KEY_SHORT_INDEX:
	306	pr_debug("key %04x:%04x %02x\n",
	307	le32_to_cpu(hdr->sec.short_src) >> 16,
	308	le32_to_cpu(hdr->sec.short_src) & 0xffff,
	309	hdr->sec.key_id);
	310	break;
	311
	312	case IEEE802154_SCF_KEY_HW_INDEX:
	313	key = swab64((__force u64)hdr->sec.extended_src);
	314	pr_debug("key source %8phC %02x\n", &key,
	315	hdr->sec.key_id);
	316	break;
	317	}
	318	}
	319
	320	return 0;
	321	}
	322
	323	static void
be9d215f AA	324	__ieee802154_rx_handle_packet(struct ieee802154_local *local,
be9d215f AA	325	struct sk_buff *skb)
2a9820c9 AA	326	{
	327	int ret;
	328	struct ieee802154_sub_if_data *sdata;
	329	struct ieee802154_hdr hdr;
2622e785	330	struct sk_buff *skb2;
2a9820c9	331
be9d215f	332	ret = ieee802154_parse_frame_start(skb, &hdr);
2a9820c9 AA	333	if (ret) {
2a9820c9 AA	334	pr_debug("got invalid frame\n");
2a9820c9 AA	335	return;
	336	}
	337
2a9820c9	338	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2622e785	339	if (sdata->wpan_dev.iftype == NL802154_IFTYPE_MONITOR)
1bc1754e VB	340	continue;
	341
	342	if (!ieee802154_sdata_running(sdata))
2a9820c9 AA	343	continue;
2a9820c9 AA	344
0218277d MR	345	/* Do not deliver packets received on interfaces expecting
	346	* AACK=1 if the address filters where disabled.
	347	*/
	348	if (local->hw.phy->filtering < IEEE802154_FILTERING_4_FRAME_FIELDS &&
	349	sdata->required_filtering == IEEE802154_FILTERING_4_FRAME_FIELDS)
	350	continue;
	351
2622e785 MR	352	skb2 = skb_clone(skb, GFP_ATOMIC);
	353	if (skb2) {
	354	skb2->dev = sdata->dev;
	355	ieee802154_subif_frame(sdata, skb2, &hdr);
	356	}
2a9820c9	357	}
2a9820c9 AA	358	}
2a9820c9 AA	359
4ca18be5	360	static void
be9d215f	361	ieee802154_monitors_rx(struct ieee802154_local local, struct sk_buff skb)
2a9820c9 AA	362	{
	363	struct sk_buff *skb2;
	364	struct ieee802154_sub_if_data *sdata;
2a9820c9	365
9cf215d0	366	skb_reset_mac_header(skb);
75a46f0e	367	skb->ip_summed = CHECKSUM_UNNECESSARY;
c9ca6401	368	skb->pkt_type = PACKET_OTHERHOST;
702dcf99 AA	369	skb->protocol = htons(ETH_P_IEEE802154);
702dcf99 AA	370
2a9820c9	371	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
ed65963b	372	if (sdata->wpan_dev.iftype != NL802154_IFTYPE_MONITOR)
20b48120 AA	373	continue;
	374
	375	if (!ieee802154_sdata_running(sdata))
2a9820c9 AA	376	continue;
	377
	378	skb2 = skb_clone(skb, GFP_ATOMIC);
05f7de67 AA	379	if (skb2) {
	380	skb2->dev = sdata->dev;
	381	ieee802154_deliver_skb(skb2);
2a9820c9	382
05f7de67 AA	383	sdata->dev->stats.rx_packets++;
	384	sdata->dev->stats.rx_bytes += skb->len;
	385	}
2a9820c9	386	}
2a9820c9 AA	387	}
2a9820c9 AA	388
d10270ce	389	void ieee802154_rx(struct ieee802154_local local, struct sk_buff skb)
1cd829c8	390	{
ec718f3d	391	u16 crc;
1cd829c8	392
469100d6 AA	393	WARN_ON_ONCE(softirq_count() == 0);
469100d6 AA	394
3cf24cf8	395	if (local->suspended)
4d1c7d87	396	goto free_skb;
3cf24cf8	397
b7889497 AA	398	/* TODO: When a transceiver omits the checksum here, we
	399	* add an own calculated one. This is currently an ugly
	400	* solution because the monitor needs a crc here.
	401	*/
	402	if (local->hw.flags & IEEE802154_HW_RX_OMIT_CKSUM) {
ec718f3d	403	crc = crc_ccitt(0, skb->data, skb->len);
b7889497	404	put_unaligned_le16(crc, skb_put(skb, 2));
1cd829c8	405	}
1cd829c8	406
e176b681 AA	407	rcu_read_lock();
e176b681 AA	408
be9d215f	409	ieee802154_monitors_rx(local, skb);
2d3b5b0a	410
a4b5b4c5 MR	411	/* Level 1 filtering: Check the FCS by software when relevant */
a4b5b4c5 MR	412	if (local->hw.phy->filtering == IEEE802154_FILTERING_NONE) {
ec718f3d	413	crc = crc_ccitt(0, skb->data, skb->len);
4d1c7d87	414	if (crc)
3cf24cf8	415	goto drop;
ec718f3d	416	}
b7889497 AA	417	/* remove crc */
b7889497 AA	418	skb_trim(skb, skb->len - 2);
e176b681	419
b7889497	420	__ieee802154_rx_handle_packet(local, skb);
2d3b5b0a	421
3cf24cf8	422	drop:
4d1c7d87 MR	423	rcu_read_unlock();
4d1c7d87 MR	424	free_skb:
3cf24cf8	425	kfree_skb(skb);
1cd829c8	426	}
1cd829c8	427
1cd829c8	428	void
5a504397	429	ieee802154_rx_irqsafe(struct ieee802154_hw hw, struct sk_buff skb, u8 lqi)
1cd829c8	430	{
60741361	431	struct ieee802154_local *local = hw_to_local(hw);
5a5c4e06	432	struct ieee802154_mac_cb *cb = mac_cb_init(skb);
1cd829c8	433
5a5c4e06	434	cb->lqi = lqi;
c5c47e67 AA	435	skb->pkt_type = IEEE802154_RX_MSG;
	436	skb_queue_tail(&local->skb_queue, skb);
	437	tasklet_schedule(&local->tasklet);
1cd829c8	438	}
1cd829c8	439	EXPORT_SYMBOL(ieee802154_rx_irqsafe);