[thirdparty/kernel/linux.git] / drivers / staging / wilc1000 / linux_mon.c

// SPDX-License-Identifier: GPL-2.0
/*!
 *  @file	linux_mon.c
 *  @brief	File Operations OS wrapper functionality
 *  @author	mdaftedar
 *  @sa		wilc_wfi_netdevice.h
 *  @date	01 MAR 2012
 *  @version	1.0
 */
#include "wilc_wfi_cfgoperations.h"
#include "wilc_wlan_if.h"
#include "wilc_wlan.h"

struct wilc_wfi_radiotap_hdr {
	struct ieee80211_radiotap_header hdr;
	u8 rate;
} __packed;

struct wilc_wfi_radiotap_cb_hdr {
	struct ieee80211_radiotap_header hdr;
	u8 rate;
	u8 dump;
	u16 tx_flags;
} __packed;

static struct net_device *wilc_wfi_mon; /* global monitor netdev */

static u8 srcadd[6];
static u8 bssid[6];
static u8 broadcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
/**
 *  @brief      WILC_WFI_monitor_rx
 *  @details
 *  @param[in]
 *  @return     int : Return 0 on Success
 *  @author	mdaftedar
 *  @date	12 JUL 2012
 *  @version	1.0
 */

#define IEEE80211_RADIOTAP_F_TX_RTS	0x0004  /* used rts/cts handshake */
#define IEEE80211_RADIOTAP_F_TX_FAIL	0x0001  /* failed due to excessive*/
#define IS_MANAGMEMENT				0x100
#define IS_MANAGMEMENT_CALLBACK			0x080
#define IS_MGMT_STATUS_SUCCES			0x040
#define GET_PKT_OFFSET(a) (((a) >> 22) & 0x1ff)

void WILC_WFI_monitor_rx(u8 *buff, u32 size)
{
	u32 header, pkt_offset;
	struct sk_buff *skb = NULL;
	struct wilc_wfi_radiotap_hdr *hdr;
	struct wilc_wfi_radiotap_cb_hdr *cb_hdr;

	if (!wilc_wfi_mon)
		return;

	if (!netif_running(wilc_wfi_mon))
		return;

	/* Get WILC header */
	memcpy(&header, (buff - HOST_HDR_OFFSET), HOST_HDR_OFFSET);
	/*
	 * The packet offset field contain info about what type of management
	 * the frame we are dealing with and ack status
	 */
	pkt_offset = GET_PKT_OFFSET(header);

	if (pkt_offset & IS_MANAGMEMENT_CALLBACK) {
		/* hostapd callback mgmt frame */

		skb = dev_alloc_skb(size + sizeof(struct wilc_wfi_radiotap_cb_hdr));
		if (!skb)
			return;

		skb_put_data(skb, buff, size);

		cb_hdr = skb_push(skb, sizeof(*cb_hdr));
		memset(cb_hdr, 0, sizeof(struct wilc_wfi_radiotap_cb_hdr));

		cb_hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */

		cb_hdr->hdr.it_len = cpu_to_le16(sizeof(struct wilc_wfi_radiotap_cb_hdr));

		cb_hdr->hdr.it_present = cpu_to_le32(
				(1 << IEEE80211_RADIOTAP_RATE) |
				(1 << IEEE80211_RADIOTAP_TX_FLAGS));

		cb_hdr->rate = 5; /* txrate->bitrate / 5; */

		if (pkt_offset & IS_MGMT_STATUS_SUCCES)	{
			/* success */
			cb_hdr->tx_flags = IEEE80211_RADIOTAP_F_TX_RTS;
		} else {
			cb_hdr->tx_flags = IEEE80211_RADIOTAP_F_TX_FAIL;
		}

	} else {
		skb = dev_alloc_skb(size + sizeof(struct wilc_wfi_radiotap_hdr));

		if (!skb)
			return;

		skb_put_data(skb, buff, size);
		hdr = skb_push(skb, sizeof(*hdr));
		memset(hdr, 0, sizeof(struct wilc_wfi_radiotap_hdr));
		hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */
		hdr->hdr.it_len = cpu_to_le16(sizeof(struct wilc_wfi_radiotap_hdr));
		hdr->hdr.it_present = cpu_to_le32
				(1 << IEEE80211_RADIOTAP_RATE); /* | */
		hdr->rate = 5; /* txrate->bitrate / 5; */
	}

	skb->dev = wilc_wfi_mon;
	skb_reset_mac_header(skb);
	skb->ip_summed = CHECKSUM_UNNECESSARY;
	skb->pkt_type = PACKET_OTHERHOST;
	skb->protocol = htons(ETH_P_802_2);
	memset(skb->cb, 0, sizeof(skb->cb));

	netif_rx(skb);
}

struct tx_complete_mon_data {
	int size;
	void *buff;
};

static void mgmt_tx_complete(void *priv, int status)
{
	struct tx_complete_mon_data *pv_data = priv;
	/*
	 * in case of fully hosting mode, the freeing will be done
	 * in response to the cfg packet
	 */
	kfree(pv_data->buff);

	kfree(pv_data);
}

static int mon_mgmt_tx(struct net_device *dev, const u8 *buf, size_t len)
{
	struct tx_complete_mon_data *mgmt_tx = NULL;

	if (!dev)
		return -EFAULT;

	netif_stop_queue(dev);
	mgmt_tx = kmalloc(sizeof(*mgmt_tx), GFP_ATOMIC);
	if (!mgmt_tx)
		return -ENOMEM;

	mgmt_tx->buff = kmalloc(len, GFP_ATOMIC);
	if (!mgmt_tx->buff) {
		kfree(mgmt_tx);
		return -ENOMEM;
	}

	mgmt_tx->size = len;

	memcpy(mgmt_tx->buff, buf, len);
	wilc_wlan_txq_add_mgmt_pkt(dev, mgmt_tx, mgmt_tx->buff, mgmt_tx->size,
				   mgmt_tx_complete);

	netif_wake_queue(dev);
	return 0;
}

/**
 *  @brief      WILC_WFI_mon_xmit
 *  @details
 *  @param[in]
 *  @return     int : Return 0 on Success
 *  @author	mdaftedar
 *  @date	12 JUL 2012
 *  @version	1.0
 */
static netdev_tx_t WILC_WFI_mon_xmit(struct sk_buff *skb,
				     struct net_device *dev)
{
	u32 rtap_len, ret = 0;
	struct WILC_WFI_mon_priv  *mon_priv;

	struct sk_buff *skb2;
	struct wilc_wfi_radiotap_cb_hdr *cb_hdr;

	if (!wilc_wfi_mon)
		return -EFAULT;

	mon_priv = netdev_priv(wilc_wfi_mon);
	if (!mon_priv)
		return -EFAULT;
	rtap_len = ieee80211_get_radiotap_len(skb->data);
	if (skb->len < rtap_len)
		return -1;

	skb_pull(skb, rtap_len);

	if (skb->data[0] == 0xc0 && (!(memcmp(broadcast, &skb->data[4], 6)))) {
		skb2 = dev_alloc_skb(skb->len + sizeof(struct wilc_wfi_radiotap_cb_hdr));
		if (!skb2)
			return -ENOMEM;

		skb_put_data(skb2, skb->data, skb->len);

		cb_hdr = skb_push(skb2, sizeof(*cb_hdr));
		memset(cb_hdr, 0, sizeof(struct wilc_wfi_radiotap_cb_hdr));

		cb_hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */

		cb_hdr->hdr.it_len = cpu_to_le16(sizeof(struct wilc_wfi_radiotap_cb_hdr));

		cb_hdr->hdr.it_present = cpu_to_le32(
				(1 << IEEE80211_RADIOTAP_RATE) |
				(1 << IEEE80211_RADIOTAP_TX_FLAGS));

		cb_hdr->rate = 5; /* txrate->bitrate / 5; */
		cb_hdr->tx_flags = 0x0004;

		skb2->dev = wilc_wfi_mon;
		skb_reset_mac_header(skb2);
		skb2->ip_summed = CHECKSUM_UNNECESSARY;
		skb2->pkt_type = PACKET_OTHERHOST;
		skb2->protocol = htons(ETH_P_802_2);
		memset(skb2->cb, 0, sizeof(skb2->cb));

		netif_rx(skb2);

		return 0;
	}
	skb->dev = mon_priv->real_ndev;

	/* Identify if Ethernet or MAC header (data or mgmt) */
	memcpy(srcadd, &skb->data[10], 6);
	memcpy(bssid, &skb->data[16], 6);
	/* if source address and bssid fields are equal>>Mac header */
	/*send it to mgmt frames handler */
	if (!(memcmp(srcadd, bssid, 6))) {
		ret = mon_mgmt_tx(mon_priv->real_ndev, skb->data, skb->len);
		if (ret)
			netdev_err(dev, "fail to mgmt tx\n");
		dev_kfree_skb(skb);
	} else {
		ret = wilc_mac_xmit(skb, mon_priv->real_ndev);
	}

	return ret;
}

static const struct net_device_ops wilc_wfi_netdev_ops = {
	.ndo_start_xmit         = WILC_WFI_mon_xmit,

};

/**
 *  @brief      WILC_WFI_init_mon_interface
 *  @details
 *  @param[in]
 *  @return     int : Return 0 on Success
 *  @author	mdaftedar
 *  @date	12 JUL 2012
 *  @version	1.0
 */
struct net_device *WILC_WFI_init_mon_interface(const char *name,
					       struct net_device *real_dev)
{
	u32 ret = 0;
	struct WILC_WFI_mon_priv *priv;

	/*If monitor interface is already initialized, return it*/
	if (wilc_wfi_mon)
		return wilc_wfi_mon;

	wilc_wfi_mon = alloc_etherdev(sizeof(struct WILC_WFI_mon_priv));
	if (!wilc_wfi_mon)
		return NULL;
	wilc_wfi_mon->type = ARPHRD_IEEE80211_RADIOTAP;
	strncpy(wilc_wfi_mon->name, name, IFNAMSIZ);
	wilc_wfi_mon->name[IFNAMSIZ - 1] = 0;
	wilc_wfi_mon->netdev_ops = &wilc_wfi_netdev_ops;

	ret = register_netdevice(wilc_wfi_mon);
	if (ret) {
		netdev_err(real_dev, "register_netdevice failed\n");
		return NULL;
	}
	priv = netdev_priv(wilc_wfi_mon);
	if (!priv)
		return NULL;

	priv->real_ndev = real_dev;

	return wilc_wfi_mon;
}

/**
 *  @brief      WILC_WFI_deinit_mon_interface
 *  @details
 *  @param[in]
 *  @return     int : Return 0 on Success
 *  @author	mdaftedar
 *  @date	12 JUL 2012
 *  @version	1.0
 */
int WILC_WFI_deinit_mon_interface(void)
{
	bool rollback_lock = false;

	if (wilc_wfi_mon) {
		if (rtnl_is_locked()) {
			rtnl_unlock();
			rollback_lock = true;
		}
		unregister_netdev(wilc_wfi_mon);

		if (rollback_lock) {
			rtnl_lock();
			rollback_lock = false;
		}
		wilc_wfi_mon = NULL;
	}
	return 0;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
c5c77ba1 JK	2	/*!
	3	* @file linux_mon.c
	4	* @brief File Operations OS wrapper functionality
	5	* @author mdaftedar
	6	* @sa wilc_wfi_netdevice.h
	7	* @date 01 MAR 2012
	8	* @version 1.0
	9	*/
c5c77ba1	10	#include "wilc_wfi_cfgoperations.h"
c5c77ba1 JK	11	#include "wilc_wlan_if.h"
c5c77ba1 JK	12	#include "wilc_wlan.h"
9690df3f	13
c5c77ba1 JK	14	struct wilc_wfi_radiotap_hdr {
	15	struct ieee80211_radiotap_header hdr;
	16	u8 rate;
d8c7d2b3	17	} __packed;
c5c77ba1 JK	18
	19	struct wilc_wfi_radiotap_cb_hdr {
	20	struct ieee80211_radiotap_header hdr;
	21	u8 rate;
	22	u8 dump;
	23	u16 tx_flags;
d8c7d2b3	24	} __packed;
c5c77ba1	25
c5c77ba1 JK	26	static struct net_device wilc_wfi_mon; / global monitor netdev */
c5c77ba1 JK	27
add0f9fe	28	static u8 srcadd[6];
1608c403 AB	29	static u8 bssid[6];
1608c403 AB	30	static u8 broadcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
c5c77ba1 JK	31	/**
	32	* @brief WILC_WFI_monitor_rx
	33	* @details
	34	* @param[in]
	35	* @return int : Return 0 on Success
	36	* @author mdaftedar
	37	* @date 12 JUL 2012
	38	* @version 1.0
	39	*/
	40
	41	#define IEEE80211_RADIOTAP_F_TX_RTS 0x0004 /* used rts/cts handshake */
	42	#define IEEE80211_RADIOTAP_F_TX_FAIL 0x0001 /* failed due to excessive*/
	43	#define IS_MANAGMEMENT 0x100
	44	#define IS_MANAGMEMENT_CALLBACK 0x080
	45	#define IS_MGMT_STATUS_SUCCES 0x040
	46	#define GET_PKT_OFFSET(a) (((a) >> 22) & 0x1ff)
	47
fbc2fe16	48	void WILC_WFI_monitor_rx(u8 *buff, u32 size)
c5c77ba1	49	{
fbc2fe16	50	u32 header, pkt_offset;
c5c77ba1 JK	51	struct sk_buff *skb = NULL;
	52	struct wilc_wfi_radiotap_hdr *hdr;
	53	struct wilc_wfi_radiotap_cb_hdr *cb_hdr;
	54
a1436579	55	if (!wilc_wfi_mon)
c5c77ba1 JK	56	return;
c5c77ba1 JK	57
ccff7f81	58	if (!netif_running(wilc_wfi_mon))
c5c77ba1	59	return;
c5c77ba1 JK	60
	61	/* Get WILC header */
	62	memcpy(&header, (buff - HOST_HDR_OFFSET), HOST_HDR_OFFSET);
1b7c69e8 AJ	63	/*
	64	* The packet offset field contain info about what type of management
	65	* the frame we are dealing with and ack status
	66	*/
c5c77ba1 JK	67	pkt_offset = GET_PKT_OFFSET(header);
	68
	69	if (pkt_offset & IS_MANAGMEMENT_CALLBACK) {
c5c77ba1 JK	70	/* hostapd callback mgmt frame */
	71
	72	skb = dev_alloc_skb(size + sizeof(struct wilc_wfi_radiotap_cb_hdr));
ccff7f81	73	if (!skb)
c5c77ba1	74	return;
c5c77ba1	75
59ae1d12	76	skb_put_data(skb, buff, size);
c5c77ba1	77
d58ff351	78	cb_hdr = skb_push(skb, sizeof(*cb_hdr));
c5c77ba1 JK	79	memset(cb_hdr, 0, sizeof(struct wilc_wfi_radiotap_cb_hdr));
	80
	81	cb_hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */
	82
	83	cb_hdr->hdr.it_len = cpu_to_le16(sizeof(struct wilc_wfi_radiotap_cb_hdr));
	84
	85	cb_hdr->hdr.it_present = cpu_to_le32(
	86	(1 << IEEE80211_RADIOTAP_RATE) \|
	87	(1 << IEEE80211_RADIOTAP_TX_FLAGS));
	88
	89	cb_hdr->rate = 5; /* txrate->bitrate / 5; */
	90
	91	if (pkt_offset & IS_MGMT_STATUS_SUCCES) {
	92	/* success */
	93	cb_hdr->tx_flags = IEEE80211_RADIOTAP_F_TX_RTS;
	94	} else {
	95	cb_hdr->tx_flags = IEEE80211_RADIOTAP_F_TX_FAIL;
	96	}
	97
	98	} else {
c5c77ba1 JK	99	skb = dev_alloc_skb(size + sizeof(struct wilc_wfi_radiotap_hdr));
c5c77ba1 JK	100
ccff7f81	101	if (!skb)
c5c77ba1	102	return;
c5c77ba1	103
59ae1d12	104	skb_put_data(skb, buff, size);
d58ff351	105	hdr = skb_push(skb, sizeof(*hdr));
c5c77ba1 JK	106	memset(hdr, 0, sizeof(struct wilc_wfi_radiotap_hdr));
c5c77ba1 JK	107	hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */
c5c77ba1	108	hdr->hdr.it_len = cpu_to_le16(sizeof(struct wilc_wfi_radiotap_hdr));
c5c77ba1	109	hdr->hdr.it_present = cpu_to_le32
1b7c69e8	110	(1 << IEEE80211_RADIOTAP_RATE); /* \| */
c5c77ba1	111	hdr->rate = 5; /* txrate->bitrate / 5; */
c5c77ba1 JK	112	}
c5c77ba1 JK	113
c5c77ba1	114	skb->dev = wilc_wfi_mon;
fe211cd8	115	skb_reset_mac_header(skb);
c5c77ba1 JK	116	skb->ip_summed = CHECKSUM_UNNECESSARY;
	117	skb->pkt_type = PACKET_OTHERHOST;
	118	skb->protocol = htons(ETH_P_802_2);
	119	memset(skb->cb, 0, sizeof(skb->cb));
	120
	121	netif_rx(skb);
c5c77ba1 JK	122	}
	123
	124	struct tx_complete_mon_data {
	125	int size;
	126	void *buff;
	127	};
	128
	129	static void mgmt_tx_complete(void *priv, int status)
	130	{
6bcc1e1e	131	struct tx_complete_mon_data *pv_data = priv;
1b7c69e8 AJ	132	/*
	133	* in case of fully hosting mode, the freeing will be done
	134	* in response to the cfg packet
	135	*/
c5c77ba1 JK	136	kfree(pv_data->buff);
	137
	138	kfree(pv_data);
c5c77ba1	139	}
964d8936	140
c5c77ba1 JK	141	static int mon_mgmt_tx(struct net_device dev, const u8 buf, size_t len)
c5c77ba1 JK	142	{
c5c77ba1 JK	143	struct tx_complete_mon_data *mgmt_tx = NULL;
c5c77ba1 JK	144
60959e53	145	if (!dev)
e6e12661	146	return -EFAULT;
c5c77ba1 JK	147
c5c77ba1 JK	148	netif_stop_queue(dev);
fa611271	149	mgmt_tx = kmalloc(sizeof(*mgmt_tx), GFP_ATOMIC);
e5349952	150	if (!mgmt_tx)
b026f6e8	151	return -ENOMEM;
c5c77ba1	152
30ef5c8b	153	mgmt_tx->buff = kmalloc(len, GFP_ATOMIC);
a1436579	154	if (!mgmt_tx->buff) {
f638dd39	155	kfree(mgmt_tx);
b026f6e8	156	return -ENOMEM;
c5c77ba1 JK	157	}
	158
	159	mgmt_tx->size = len;
	160
c5c77ba1	161	memcpy(mgmt_tx->buff, buf, len);
829c477f	162	wilc_wlan_txq_add_mgmt_pkt(dev, mgmt_tx, mgmt_tx->buff, mgmt_tx->size,
c9d4834d	163	mgmt_tx_complete);
c5c77ba1 JK	164
	165	netif_wake_queue(dev);
	166	return 0;
	167	}
	168
	169	/**
	170	* @brief WILC_WFI_mon_xmit
	171	* @details
	172	* @param[in]
	173	* @return int : Return 0 on Success
	174	* @author mdaftedar
	175	* @date 12 JUL 2012
	176	* @version 1.0
	177	*/
	178	static netdev_tx_t WILC_WFI_mon_xmit(struct sk_buff *skb,
	179	struct net_device *dev)
	180	{
ccff7f81	181	u32 rtap_len, ret = 0;
c5c77ba1 JK	182	struct WILC_WFI_mon_priv *mon_priv;
	183
	184	struct sk_buff *skb2;
	185	struct wilc_wfi_radiotap_cb_hdr *cb_hdr;
	186
a1436579	187	if (!wilc_wfi_mon)
e6e12661	188	return -EFAULT;
c5c77ba1	189
c5c77ba1	190	mon_priv = netdev_priv(wilc_wfi_mon);
60959e53	191	if (!mon_priv)
e6e12661	192	return -EFAULT;
c5c77ba1	193	rtap_len = ieee80211_get_radiotap_len(skb->data);
60959e53	194	if (skb->len < rtap_len)
c5c77ba1	195	return -1;
60959e53	196
c5c77ba1 JK	197	skb_pull(skb, rtap_len);
c5c77ba1 JK	198
c5c77ba1 JK	199	if (skb->data[0] == 0xc0 && (!(memcmp(broadcast, &skb->data[4], 6)))) {
c5c77ba1 JK	200	skb2 = dev_alloc_skb(skb->len + sizeof(struct wilc_wfi_radiotap_cb_hdr));
9e966527 PB	201	if (!skb2)
9e966527 PB	202	return -ENOMEM;
c5c77ba1	203
59ae1d12	204	skb_put_data(skb2, skb->data, skb->len);
c5c77ba1	205
d58ff351	206	cb_hdr = skb_push(skb2, sizeof(*cb_hdr));
c5c77ba1 JK	207	memset(cb_hdr, 0, sizeof(struct wilc_wfi_radiotap_cb_hdr));
	208
	209	cb_hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */
	210
	211	cb_hdr->hdr.it_len = cpu_to_le16(sizeof(struct wilc_wfi_radiotap_cb_hdr));
	212
	213	cb_hdr->hdr.it_present = cpu_to_le32(
	214	(1 << IEEE80211_RADIOTAP_RATE) \|
	215	(1 << IEEE80211_RADIOTAP_TX_FLAGS));
	216
	217	cb_hdr->rate = 5; /* txrate->bitrate / 5; */
	218	cb_hdr->tx_flags = 0x0004;
	219
	220	skb2->dev = wilc_wfi_mon;
fe211cd8	221	skb_reset_mac_header(skb2);
c5c77ba1 JK	222	skb2->ip_summed = CHECKSUM_UNNECESSARY;
	223	skb2->pkt_type = PACKET_OTHERHOST;
	224	skb2->protocol = htons(ETH_P_802_2);
	225	memset(skb2->cb, 0, sizeof(skb2->cb));
	226
	227	netif_rx(skb2);
	228
	229	return 0;
	230	}
	231	skb->dev = mon_priv->real_ndev;
c5c77ba1	232
c5c77ba1	233	/* Identify if Ethernet or MAC header (data or mgmt) */
add0f9fe	234	memcpy(srcadd, &skb->data[10], 6);
c5c77ba1 JK	235	memcpy(bssid, &skb->data[16], 6);
	236	/* if source address and bssid fields are equal>>Mac header */
	237	/send it to mgmt frames handler /
add0f9fe	238	if (!(memcmp(srcadd, bssid, 6))) {
2eaf35c1 LK	239	ret = mon_mgmt_tx(mon_priv->real_ndev, skb->data, skb->len);
	240	if (ret)
	241	netdev_err(dev, "fail to mgmt tx\n");
c5c77ba1	242	dev_kfree_skb(skb);
b4a53a62	243	} else {
0e1af73d	244	ret = wilc_mac_xmit(skb, mon_priv->real_ndev);
b4a53a62	245	}
c5c77ba1	246
c5c77ba1 JK	247	return ret;
	248	}
	249
	250	static const struct net_device_ops wilc_wfi_netdev_ops = {
	251	.ndo_start_xmit = WILC_WFI_mon_xmit,
	252
	253	};
	254
c5c77ba1 JK	255	/**
	256	* @brief WILC_WFI_init_mon_interface
	257	* @details
	258	* @param[in]
	259	* @return int : Return 0 on Success
	260	* @author mdaftedar
	261	* @date 12 JUL 2012
	262	* @version 1.0
	263	*/
1b7c69e8 AJ	264	struct net_device WILC_WFI_init_mon_interface(const char name,
1b7c69e8 AJ	265	struct net_device *real_dev)
c5c77ba1	266	{
e6e12661	267	u32 ret = 0;
c5c77ba1 JK	268	struct WILC_WFI_mon_priv *priv;
	269
	270	/If monitor interface is already initialized, return it/
c22177db	271	if (wilc_wfi_mon)
c5c77ba1	272	return wilc_wfi_mon;
c5c77ba1 JK	273
c5c77ba1 JK	274	wilc_wfi_mon = alloc_etherdev(sizeof(struct WILC_WFI_mon_priv));
60959e53	275	if (!wilc_wfi_mon)
c5c77ba1	276	return NULL;
c5c77ba1 JK	277	wilc_wfi_mon->type = ARPHRD_IEEE80211_RADIOTAP;
	278	strncpy(wilc_wfi_mon->name, name, IFNAMSIZ);
	279	wilc_wfi_mon->name[IFNAMSIZ - 1] = 0;
	280	wilc_wfi_mon->netdev_ops = &wilc_wfi_netdev_ops;
	281
	282	ret = register_netdevice(wilc_wfi_mon);
	283	if (ret) {
d892c97c	284	netdev_err(real_dev, "register_netdevice failed\n");
c5c77ba1 JK	285	return NULL;
	286	}
	287	priv = netdev_priv(wilc_wfi_mon);
60959e53	288	if (!priv)
c5c77ba1	289	return NULL;
c5c77ba1 JK	290
	291	priv->real_ndev = real_dev;
	292
	293	return wilc_wfi_mon;
	294	}
	295
	296	/**
	297	* @brief WILC_WFI_deinit_mon_interface
	298	* @details
	299	* @param[in]
	300	* @return int : Return 0 on Success
	301	* @author mdaftedar
	302	* @date 12 JUL 2012
	303	* @version 1.0
	304	*/
a96c47e1	305	int WILC_WFI_deinit_mon_interface(void)
c5c77ba1 JK	306	{
	307	bool rollback_lock = false;
	308
a1436579	309	if (wilc_wfi_mon) {
c5c77ba1 JK	310	if (rtnl_is_locked()) {
	311	rtnl_unlock();
	312	rollback_lock = true;
	313	}
c5c77ba1	314	unregister_netdev(wilc_wfi_mon);
c5c77ba1 JK	315
	316	if (rollback_lock) {
	317	rtnl_lock();
	318	rollback_lock = false;
	319	}
	320	wilc_wfi_mon = NULL;
	321	}
e6e12661	322	return 0;
c5c77ba1	323	}