[deliverable/linux.git] / drivers / staging / wilc1000 / linux_mon.c

/*!
 *  @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;

		memcpy(skb_put(skb, size), buff, size);

		cb_hdr = (struct wilc_wfi_radiotap_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;

		memcpy(skb_put(skb, size), buff, size);
		hdr = (struct wilc_wfi_radiotap_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_set_mac_header(skb, 0);
	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));

		memcpy(skb_put(skb2, skb->len), skb->data, skb->len);

		cb_hdr = (struct wilc_wfi_radiotap_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_set_mac_header(skb2, 0);
		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
c5c77ba1 JK	1	/*!
	2	* @file linux_mon.c
	3	* @brief File Operations OS wrapper functionality
	4	* @author mdaftedar
	5	* @sa wilc_wfi_netdevice.h
	6	* @date 01 MAR 2012
	7	* @version 1.0
	8	*/
c5c77ba1	9	#include "wilc_wfi_cfgoperations.h"
c5c77ba1 JK	10	#include "wilc_wlan_if.h"
c5c77ba1 JK	11	#include "wilc_wlan.h"
9690df3f	12
c5c77ba1 JK	13	struct wilc_wfi_radiotap_hdr {
	14	struct ieee80211_radiotap_header hdr;
	15	u8 rate;
d8c7d2b3	16	} __packed;
c5c77ba1 JK	17
	18	struct wilc_wfi_radiotap_cb_hdr {
	19	struct ieee80211_radiotap_header hdr;
	20	u8 rate;
	21	u8 dump;
	22	u16 tx_flags;
d8c7d2b3	23	} __packed;
c5c77ba1	24
c5c77ba1 JK	25	static struct net_device wilc_wfi_mon; / global monitor netdev */
c5c77ba1 JK	26
add0f9fe	27	static u8 srcadd[6];
1608c403 AB	28	static u8 bssid[6];
1608c403 AB	29	static u8 broadcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
c5c77ba1 JK	30	/**
	31	* @brief WILC_WFI_monitor_rx
	32	* @details
	33	* @param[in]
	34	* @return int : Return 0 on Success
	35	* @author mdaftedar
	36	* @date 12 JUL 2012
	37	* @version 1.0
	38	*/
	39
	40	#define IEEE80211_RADIOTAP_F_TX_RTS 0x0004 /* used rts/cts handshake */
	41	#define IEEE80211_RADIOTAP_F_TX_FAIL 0x0001 /* failed due to excessive*/
	42	#define IS_MANAGMEMENT 0x100
	43	#define IS_MANAGMEMENT_CALLBACK 0x080
	44	#define IS_MGMT_STATUS_SUCCES 0x040
	45	#define GET_PKT_OFFSET(a) (((a) >> 22) & 0x1ff)
	46
fbc2fe16	47	void WILC_WFI_monitor_rx(u8 *buff, u32 size)
c5c77ba1	48	{
fbc2fe16	49	u32 header, pkt_offset;
c5c77ba1 JK	50	struct sk_buff *skb = NULL;
	51	struct wilc_wfi_radiotap_hdr *hdr;
	52	struct wilc_wfi_radiotap_cb_hdr *cb_hdr;
	53
a1436579	54	if (!wilc_wfi_mon)
c5c77ba1 JK	55	return;
c5c77ba1 JK	56
ccff7f81	57	if (!netif_running(wilc_wfi_mon))
c5c77ba1	58	return;
c5c77ba1 JK	59
	60	/* Get WILC header */
	61	memcpy(&header, (buff - HOST_HDR_OFFSET), HOST_HDR_OFFSET);
1b7c69e8 AJ	62	/*
	63	* The packet offset field contain info about what type of management
	64	* the frame we are dealing with and ack status
	65	*/
c5c77ba1 JK	66	pkt_offset = GET_PKT_OFFSET(header);
	67
	68	if (pkt_offset & IS_MANAGMEMENT_CALLBACK) {
c5c77ba1 JK	69	/* hostapd callback mgmt frame */
	70
	71	skb = dev_alloc_skb(size + sizeof(struct wilc_wfi_radiotap_cb_hdr));
ccff7f81	72	if (!skb)
c5c77ba1	73	return;
c5c77ba1 JK	74
	75	memcpy(skb_put(skb, size), buff, size);
	76
382af7f2	77	cb_hdr = (struct wilc_wfi_radiotap_cb_hdr )skb_push(skb, sizeof(cb_hdr));
c5c77ba1 JK	78	memset(cb_hdr, 0, sizeof(struct wilc_wfi_radiotap_cb_hdr));
	79
	80	cb_hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */
	81
	82	cb_hdr->hdr.it_len = cpu_to_le16(sizeof(struct wilc_wfi_radiotap_cb_hdr));
	83
	84	cb_hdr->hdr.it_present = cpu_to_le32(
	85	(1 << IEEE80211_RADIOTAP_RATE) \|
	86	(1 << IEEE80211_RADIOTAP_TX_FLAGS));
	87
	88	cb_hdr->rate = 5; /* txrate->bitrate / 5; */
	89
	90	if (pkt_offset & IS_MGMT_STATUS_SUCCES) {
	91	/* success */
	92	cb_hdr->tx_flags = IEEE80211_RADIOTAP_F_TX_RTS;
	93	} else {
	94	cb_hdr->tx_flags = IEEE80211_RADIOTAP_F_TX_FAIL;
	95	}
	96
	97	} else {
c5c77ba1 JK	98	skb = dev_alloc_skb(size + sizeof(struct wilc_wfi_radiotap_hdr));
c5c77ba1 JK	99
ccff7f81	100	if (!skb)
c5c77ba1	101	return;
c5c77ba1	102
c5c77ba1	103	memcpy(skb_put(skb, size), buff, size);
382af7f2	104	hdr = (struct wilc_wfi_radiotap_hdr )skb_push(skb, sizeof(hdr));
c5c77ba1 JK	105	memset(hdr, 0, sizeof(struct wilc_wfi_radiotap_hdr));
c5c77ba1 JK	106	hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */
c5c77ba1	107	hdr->hdr.it_len = cpu_to_le16(sizeof(struct wilc_wfi_radiotap_hdr));
c5c77ba1	108	hdr->hdr.it_present = cpu_to_le32
1b7c69e8	109	(1 << IEEE80211_RADIOTAP_RATE); /* \| */
c5c77ba1	110	hdr->rate = 5; /* txrate->bitrate / 5; */
c5c77ba1 JK	111	}
c5c77ba1 JK	112
c5c77ba1 JK	113	skb->dev = wilc_wfi_mon;
	114	skb_set_mac_header(skb, 0);
	115	skb->ip_summed = CHECKSUM_UNNECESSARY;
	116	skb->pkt_type = PACKET_OTHERHOST;
	117	skb->protocol = htons(ETH_P_802_2);
	118	memset(skb->cb, 0, sizeof(skb->cb));
	119
	120	netif_rx(skb);
c5c77ba1 JK	121	}
	122
	123	struct tx_complete_mon_data {
	124	int size;
	125	void *buff;
	126	};
	127
	128	static void mgmt_tx_complete(void *priv, int status)
	129	{
6bcc1e1e	130	struct tx_complete_mon_data *pv_data = priv;
1b7c69e8 AJ	131	/*
	132	* in case of fully hosting mode, the freeing will be done
	133	* in response to the cfg packet
	134	*/
c5c77ba1 JK	135	kfree(pv_data->buff);
	136
	137	kfree(pv_data);
c5c77ba1	138	}
964d8936	139
c5c77ba1 JK	140	static int mon_mgmt_tx(struct net_device dev, const u8 buf, size_t len)
c5c77ba1 JK	141	{
c5c77ba1 JK	142	struct tx_complete_mon_data *mgmt_tx = NULL;
c5c77ba1 JK	143
60959e53	144	if (!dev)
e6e12661	145	return -EFAULT;
c5c77ba1 JK	146
c5c77ba1 JK	147	netif_stop_queue(dev);
fa611271	148	mgmt_tx = kmalloc(sizeof(*mgmt_tx), GFP_ATOMIC);
e5349952	149	if (!mgmt_tx)
b026f6e8	150	return -ENOMEM;
c5c77ba1	151
30ef5c8b	152	mgmt_tx->buff = kmalloc(len, GFP_ATOMIC);
a1436579	153	if (!mgmt_tx->buff) {
f638dd39	154	kfree(mgmt_tx);
b026f6e8	155	return -ENOMEM;
c5c77ba1 JK	156	}
	157
	158	mgmt_tx->size = len;
	159
c5c77ba1	160	memcpy(mgmt_tx->buff, buf, len);
829c477f	161	wilc_wlan_txq_add_mgmt_pkt(dev, mgmt_tx, mgmt_tx->buff, mgmt_tx->size,
c9d4834d	162	mgmt_tx_complete);
c5c77ba1 JK	163
	164	netif_wake_queue(dev);
	165	return 0;
	166	}
	167
	168	/**
	169	* @brief WILC_WFI_mon_xmit
	170	* @details
	171	* @param[in]
	172	* @return int : Return 0 on Success
	173	* @author mdaftedar
	174	* @date 12 JUL 2012
	175	* @version 1.0
	176	*/
	177	static netdev_tx_t WILC_WFI_mon_xmit(struct sk_buff *skb,
	178	struct net_device *dev)
	179	{
ccff7f81	180	u32 rtap_len, ret = 0;
c5c77ba1 JK	181	struct WILC_WFI_mon_priv *mon_priv;
	182
	183	struct sk_buff *skb2;
	184	struct wilc_wfi_radiotap_cb_hdr *cb_hdr;
	185
a1436579	186	if (!wilc_wfi_mon)
e6e12661	187	return -EFAULT;
c5c77ba1	188
c5c77ba1	189	mon_priv = netdev_priv(wilc_wfi_mon);
60959e53	190	if (!mon_priv)
e6e12661	191	return -EFAULT;
c5c77ba1	192	rtap_len = ieee80211_get_radiotap_len(skb->data);
60959e53	193	if (skb->len < rtap_len)
c5c77ba1	194	return -1;
60959e53	195
c5c77ba1 JK	196	skb_pull(skb, rtap_len);
c5c77ba1 JK	197
c5c77ba1 JK	198	if (skb->data[0] == 0xc0 && (!(memcmp(broadcast, &skb->data[4], 6)))) {
	199	skb2 = dev_alloc_skb(skb->len + sizeof(struct wilc_wfi_radiotap_cb_hdr));
	200
	201	memcpy(skb_put(skb2, skb->len), skb->data, skb->len);
	202
382af7f2	203	cb_hdr = (struct wilc_wfi_radiotap_cb_hdr )skb_push(skb2, sizeof(cb_hdr));
c5c77ba1 JK	204	memset(cb_hdr, 0, sizeof(struct wilc_wfi_radiotap_cb_hdr));
	205
	206	cb_hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */
	207
	208	cb_hdr->hdr.it_len = cpu_to_le16(sizeof(struct wilc_wfi_radiotap_cb_hdr));
	209
	210	cb_hdr->hdr.it_present = cpu_to_le32(
	211	(1 << IEEE80211_RADIOTAP_RATE) \|
	212	(1 << IEEE80211_RADIOTAP_TX_FLAGS));
	213
	214	cb_hdr->rate = 5; /* txrate->bitrate / 5; */
	215	cb_hdr->tx_flags = 0x0004;
	216
	217	skb2->dev = wilc_wfi_mon;
	218	skb_set_mac_header(skb2, 0);
	219	skb2->ip_summed = CHECKSUM_UNNECESSARY;
	220	skb2->pkt_type = PACKET_OTHERHOST;
	221	skb2->protocol = htons(ETH_P_802_2);
	222	memset(skb2->cb, 0, sizeof(skb2->cb));
	223
	224	netif_rx(skb2);
	225
	226	return 0;
	227	}
	228	skb->dev = mon_priv->real_ndev;
c5c77ba1	229
c5c77ba1	230	/* Identify if Ethernet or MAC header (data or mgmt) */
add0f9fe	231	memcpy(srcadd, &skb->data[10], 6);
c5c77ba1 JK	232	memcpy(bssid, &skb->data[16], 6);
	233	/* if source address and bssid fields are equal>>Mac header */
	234	/send it to mgmt frames handler /
add0f9fe	235	if (!(memcmp(srcadd, bssid, 6))) {
2eaf35c1 LK	236	ret = mon_mgmt_tx(mon_priv->real_ndev, skb->data, skb->len);
	237	if (ret)
	238	netdev_err(dev, "fail to mgmt tx\n");
c5c77ba1	239	dev_kfree_skb(skb);
b4a53a62	240	} else {
0e1af73d	241	ret = wilc_mac_xmit(skb, mon_priv->real_ndev);
b4a53a62	242	}
c5c77ba1	243
c5c77ba1 JK	244	return ret;
	245	}
	246
	247	static const struct net_device_ops wilc_wfi_netdev_ops = {
	248	.ndo_start_xmit = WILC_WFI_mon_xmit,
	249
	250	};
	251
c5c77ba1 JK	252	/**
	253	* @brief WILC_WFI_init_mon_interface
	254	* @details
	255	* @param[in]
	256	* @return int : Return 0 on Success
	257	* @author mdaftedar
	258	* @date 12 JUL 2012
	259	* @version 1.0
	260	*/
1b7c69e8 AJ	261	struct net_device WILC_WFI_init_mon_interface(const char name,
1b7c69e8 AJ	262	struct net_device *real_dev)
c5c77ba1	263	{
e6e12661	264	u32 ret = 0;
c5c77ba1 JK	265	struct WILC_WFI_mon_priv *priv;
	266
	267	/If monitor interface is already initialized, return it/
c22177db	268	if (wilc_wfi_mon)
c5c77ba1	269	return wilc_wfi_mon;
c5c77ba1 JK	270
c5c77ba1 JK	271	wilc_wfi_mon = alloc_etherdev(sizeof(struct WILC_WFI_mon_priv));
60959e53	272	if (!wilc_wfi_mon)
c5c77ba1	273	return NULL;
c5c77ba1 JK	274	wilc_wfi_mon->type = ARPHRD_IEEE80211_RADIOTAP;
	275	strncpy(wilc_wfi_mon->name, name, IFNAMSIZ);
	276	wilc_wfi_mon->name[IFNAMSIZ - 1] = 0;
	277	wilc_wfi_mon->netdev_ops = &wilc_wfi_netdev_ops;
	278
	279	ret = register_netdevice(wilc_wfi_mon);
	280	if (ret) {
d892c97c	281	netdev_err(real_dev, "register_netdevice failed\n");
c5c77ba1 JK	282	return NULL;
	283	}
	284	priv = netdev_priv(wilc_wfi_mon);
60959e53	285	if (!priv)
c5c77ba1	286	return NULL;
c5c77ba1 JK	287
	288	priv->real_ndev = real_dev;
	289
	290	return wilc_wfi_mon;
	291	}
	292
	293	/**
	294	* @brief WILC_WFI_deinit_mon_interface
	295	* @details
	296	* @param[in]
	297	* @return int : Return 0 on Success
	298	* @author mdaftedar
	299	* @date 12 JUL 2012
	300	* @version 1.0
	301	*/
a96c47e1	302	int WILC_WFI_deinit_mon_interface(void)
c5c77ba1 JK	303	{
	304	bool rollback_lock = false;
	305
a1436579	306	if (wilc_wfi_mon) {
c5c77ba1 JK	307	if (rtnl_is_locked()) {
	308	rtnl_unlock();
	309	rollback_lock = true;
	310	}
c5c77ba1	311	unregister_netdev(wilc_wfi_mon);
c5c77ba1 JK	312
	313	if (rollback_lock) {
	314	rtnl_lock();
	315	rollback_lock = false;
	316	}
	317	wilc_wfi_mon = NULL;
	318	}
e6e12661	319	return 0;
c5c77ba1	320	}