drivers/staging/rtl8712/ieee80211.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /******************************************************************************
  * ieee80211.c
  *
  * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
  * Linux device driver for RTL8192SU
  *
  * Modifications for inclusion into the Linux staging tree are
  * Copyright(c) 2010 Larry Finger. All rights reserved.
  *
  * Contact information:
  * WLAN FAE <wlanfae@realtek.com>.
  * Larry Finger <Larry.Finger@lwfinger.net>
  *
  ******************************************************************************/

 #define _IEEE80211_C

 #include "drv_types.h"
 #include "ieee80211.h"
 #include "wifi.h"
 #include "osdep_service.h"
 #include "wlan_bssdef.h"

 static const u8 WPA_OUI_TYPE[] = {0x00, 0x50, 0xf2, 1};
 static const u8 WPA_CIPHER_SUITE_NONE[] = {0x00, 0x50, 0xf2, 0};
 static const u8 WPA_CIPHER_SUITE_WEP40[] = {0x00, 0x50, 0xf2, 1};
 static const u8 WPA_CIPHER_SUITE_TKIP[] = {0x00, 0x50, 0xf2, 2};
 static const u8 WPA_CIPHER_SUITE_CCMP[] = {0x00, 0x50, 0xf2, 4};
 static const u8 WPA_CIPHER_SUITE_WEP104[] = {0x00, 0x50, 0xf2, 5};

 static const u8 RSN_CIPHER_SUITE_NONE[] = {0x00, 0x0f, 0xac, 0};
 static const u8 RSN_CIPHER_SUITE_WEP40[] = {0x00, 0x0f, 0xac, 1};
 static const u8 RSN_CIPHER_SUITE_TKIP[] = {0x00, 0x0f, 0xac, 2};
 static const u8 RSN_CIPHER_SUITE_CCMP[] = {0x00, 0x0f, 0xac, 4};
 static const u8 RSN_CIPHER_SUITE_WEP104[] = {0x00, 0x0f, 0xac, 5};

 /*-----------------------------------------------------------
  * for adhoc-master to generate ie and provide supported-rate to fw
  *-----------------------------------------------------------
  */

 static u8 WIFI_CCKRATES[] =  {
 	(IEEE80211_CCK_RATE_1MB | IEEE80211_BASIC_RATE_MASK),
 	(IEEE80211_CCK_RATE_2MB | IEEE80211_BASIC_RATE_MASK),
 	(IEEE80211_CCK_RATE_5MB | IEEE80211_BASIC_RATE_MASK),
 	(IEEE80211_CCK_RATE_11MB | IEEE80211_BASIC_RATE_MASK)
 };

 static u8 WIFI_OFDMRATES[] = {
 	(IEEE80211_OFDM_RATE_6MB),
 	(IEEE80211_OFDM_RATE_9MB),
 	(IEEE80211_OFDM_RATE_12MB),
 	(IEEE80211_OFDM_RATE_18MB),
 	(IEEE80211_OFDM_RATE_24MB),
 	(IEEE80211_OFDM_RATE_36MB),
 	(IEEE80211_OFDM_RATE_48MB),
 	(IEEE80211_OFDM_RATE_54MB)
 };

 uint r8712_is_cckrates_included(u8 *rate)
 {
 	u32 i = 0;

 	while (rate[i] != 0) {
 		if ((((rate[i]) & 0x7f) == 2) || (((rate[i]) & 0x7f) == 4) ||
 		    (((rate[i]) & 0x7f) == 11) || (((rate[i]) & 0x7f) == 22))
 			return true;
 		i++;
 	}
 	return false;
 }

 uint r8712_is_cckratesonly_included(u8 *rate)
 {
 	u32 i = 0;

 	while (rate[i] != 0) {
 		if ((((rate[i]) & 0x7f) != 2) && (((rate[i]) & 0x7f) != 4) &&
 		    (((rate[i]) & 0x7f) != 11)  && (((rate[i]) & 0x7f) != 22))
 			return false;
 		i++;
 	}
 	return true;
 }

 /* r8712_set_ie will update frame length */
 u8 *r8712_set_ie(u8 *pbuf, sint index, uint len, u8 *source, uint *frlen)
 {
 	*pbuf = (u8)index;
 	*(pbuf + 1) = (u8)len;
 	if (len > 0)
 		memcpy((void *)(pbuf + 2), (void *)source, len);
 	*frlen = *frlen + (len + 2);
 	return pbuf + len + 2;
 }

 /* ---------------------------------------------------------------------------
  * index: the information element id index, limit is the limit for search
  * ---------------------------------------------------------------------------
  */
 u8 *r8712_get_ie(u8 *pbuf, sint index, uint *len, sint limit)
 {
 	sint tmp, i;
 	u8 *p;

 	if (limit < 1)
 		return NULL;
 	p = pbuf;
 	i = 0;
 	*len = 0;
 	while (1) {
 		if (*p == index) {
 			*len = *(p + 1);
 			return p;
 		}
 		tmp = *(p + 1);
 		p += (tmp + 2);
 		i += (tmp + 2);
 		if (i >= limit)
 			break;
 	}
 	return NULL;
 }

 static void set_supported_rate(u8 *rates, uint mode)
 {
 	memset(rates, 0, NDIS_802_11_LENGTH_RATES_EX);
 	switch (mode) {
 	case WIRELESS_11B:
 		memcpy(rates, WIFI_CCKRATES, IEEE80211_CCK_RATE_LEN);
 		break;
 	case WIRELESS_11G:
 	case WIRELESS_11A:
 		memcpy(rates, WIFI_OFDMRATES, IEEE80211_NUM_OFDM_RATESLEN);
 		break;
 	case WIRELESS_11BG:
 		memcpy(rates, WIFI_CCKRATES, IEEE80211_CCK_RATE_LEN);
 		memcpy(rates + IEEE80211_CCK_RATE_LEN, WIFI_OFDMRATES,
 		       IEEE80211_NUM_OFDM_RATESLEN);
 		break;
 	}
 }

 static uint r8712_get_rateset_len(u8 *rateset)
 {
 	uint i = 0;

 	while (1) {
 		if ((rateset[i]) == 0)
 			break;
 		if (i > 12)
 			break;
 		i++;
 	}
 	return i;
 }

 int r8712_generate_ie(struct registry_priv *registrypriv)
 {
 	int rate_len;
 	uint sz = 0;
 	struct wlan_bssid_ex *dev_network = &registrypriv->dev_network;
 	u8 *ie = dev_network->IEs;
 	u16 beaconPeriod = (u16)dev_network->Configuration.BeaconPeriod;

 	/*timestamp will be inserted by hardware*/
 	sz += 8;
 	ie += sz;
 	/*beacon interval : 2bytes*/
 	*(__le16 *)ie = cpu_to_le16(beaconPeriod);
 	sz += 2;
 	ie += 2;
 	/*capability info*/
 	*(u16 *)ie = 0;
 	*(__le16 *)ie |= cpu_to_le16(WLAN_CAPABILITY_IBSS);
 	if (registrypriv->preamble == PREAMBLE_SHORT)
 		*(__le16 *)ie |= cpu_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE);
 	if (dev_network->Privacy)
 		*(__le16 *)ie |= cpu_to_le16(WLAN_CAPABILITY_PRIVACY);
 	sz += 2;
 	ie += 2;
 	/*SSID*/
 	ie = r8712_set_ie(ie, WLAN_EID_SSID, dev_network->Ssid.SsidLength,
 			  dev_network->Ssid.Ssid, &sz);
 	/*supported rates*/
 	set_supported_rate(dev_network->rates, registrypriv->wireless_mode);
 	rate_len = r8712_get_rateset_len(dev_network->rates);
 	if (rate_len > 8) {
 		ie = r8712_set_ie(ie, WLAN_EID_SUPP_RATES, 8,
 				  dev_network->rates, &sz);
 		ie = r8712_set_ie(ie, WLAN_EID_EXT_SUPP_RATES, (rate_len - 8),
 				  (dev_network->rates + 8), &sz);
 	} else {
 		ie = r8712_set_ie(ie, WLAN_EID_SUPP_RATES,
 				  rate_len, dev_network->rates, &sz);
 	}
 	/*DS parameter set*/
 	ie = r8712_set_ie(ie, WLAN_EID_DS_PARAMS, 1,
 			  (u8 *)&dev_network->Configuration.DSConfig, &sz);
 	/*IBSS Parameter Set*/
 	ie = r8712_set_ie(ie, WLAN_EID_IBSS_PARAMS, 2,
 			  (u8 *)&dev_network->Configuration.ATIMWindow, &sz);
 	return sz;
 }

 unsigned char *r8712_get_wpa_ie(unsigned char *ie, uint *wpa_ie_len, int limit)
 {
 	u32 len;
 	u16 val16;
 	unsigned char wpa_oui_type[] = {0x00, 0x50, 0xf2, 0x01};
 	u8 *buf = ie;

 	while (1) {
 		buf = r8712_get_ie(buf, _WPA_IE_ID_, &len, limit);
 		if (buf) {
 			/*check if oui matches...*/
 			if (memcmp((buf + 2), wpa_oui_type,
 				   sizeof(wpa_oui_type)))
 				goto check_next_ie;
 			/*check version...*/
 			memcpy((u8 *)&val16, (buf + 6), sizeof(val16));
 			le16_to_cpus(&val16);
 			if (val16 != 0x0001)
 				goto check_next_ie;
 			*wpa_ie_len = *(buf + 1);
 			return buf;
 		}
 		*wpa_ie_len = 0;
 		return NULL;
 check_next_ie:
 		limit = limit - (buf - ie) - 2 - len;
 		if (limit <= 0)
 			break;
 		buf += (2 + len);
 	}
 	*wpa_ie_len = 0;
 	return NULL;
 }

 unsigned char *r8712_get_wpa2_ie(unsigned char *pie, uint *rsn_ie_len,
 				 int limit)
 {
 	return r8712_get_ie(pie, _WPA2_IE_ID_, rsn_ie_len, limit);
 }

 static int r8712_get_wpa_cipher_suite(u8 *s)
 {
 	if (!memcmp(s, (void *)WPA_CIPHER_SUITE_NONE, WPA_SELECTOR_LEN))
 		return WPA_CIPHER_NONE;
 	if (!memcmp(s, (void *)WPA_CIPHER_SUITE_WEP40, WPA_SELECTOR_LEN))
 		return WPA_CIPHER_WEP40;
 	if (!memcmp(s, (void *)WPA_CIPHER_SUITE_TKIP, WPA_SELECTOR_LEN))
 		return WPA_CIPHER_TKIP;
 	if (!memcmp(s, (void *)WPA_CIPHER_SUITE_CCMP, WPA_SELECTOR_LEN))
 		return WPA_CIPHER_CCMP;
 	if (!memcmp(s, (void *)WPA_CIPHER_SUITE_WEP104, WPA_SELECTOR_LEN))
 		return WPA_CIPHER_WEP104;
 	return 0;
 }

 static int r8712_get_wpa2_cipher_suite(u8 *s)
 {
 	if (!memcmp(s, (void *)RSN_CIPHER_SUITE_NONE, RSN_SELECTOR_LEN))
 		return WPA_CIPHER_NONE;
 	if (!memcmp(s, (void *)RSN_CIPHER_SUITE_WEP40, RSN_SELECTOR_LEN))
 		return WPA_CIPHER_WEP40;
 	if (!memcmp(s, (void *)RSN_CIPHER_SUITE_TKIP, RSN_SELECTOR_LEN))
 		return WPA_CIPHER_TKIP;
 	if (!memcmp(s, (void *)RSN_CIPHER_SUITE_CCMP, RSN_SELECTOR_LEN))
 		return WPA_CIPHER_CCMP;
 	if (!memcmp(s, (void *)RSN_CIPHER_SUITE_WEP104, RSN_SELECTOR_LEN))
 		return WPA_CIPHER_WEP104;
 	return 0;
 }

 int r8712_parse_wpa_ie(u8 *wpa_ie, int wpa_ie_len, int *group_cipher,
 		       int *pairwise_cipher)
 {
 	int i;
 	int left, count;
 	u8 *pos;

 	if (wpa_ie_len <= 0) {
 		/* No WPA IE - fail silently */
 		return -EINVAL;
 	}
 	if ((*wpa_ie != _WPA_IE_ID_) ||
 	    (*(wpa_ie + 1) != (u8)(wpa_ie_len - 2)) ||
 	    (memcmp(wpa_ie + 2, (void *)WPA_OUI_TYPE, WPA_SELECTOR_LEN)))
 		return -EINVAL;
 	pos = wpa_ie;
 	pos += 8;
 	left = wpa_ie_len - 8;
 	/*group_cipher*/
 	if (left >= WPA_SELECTOR_LEN) {
 		*group_cipher = r8712_get_wpa_cipher_suite(pos);
 		pos += WPA_SELECTOR_LEN;
 		left -= WPA_SELECTOR_LEN;
 	} else if (left > 0) {
 		return -EINVAL;
 	}
 	/*pairwise_cipher*/
 	if (left >= 2) {
 		count = le16_to_cpu(*(__le16 *)pos);
 		pos += 2;
 		left -= 2;
 		if (count == 0 || left < count * WPA_SELECTOR_LEN)
 			return -EINVAL;
 		for (i = 0; i < count; i++) {
 			*pairwise_cipher |= r8712_get_wpa_cipher_suite(pos);
 			pos += WPA_SELECTOR_LEN;
 			left -= WPA_SELECTOR_LEN;
 		}
 	} else if (left == 1) {
 		return -EINVAL;
 	}
 	return 0;
 }

 int r8712_parse_wpa2_ie(u8 *rsn_ie, int rsn_ie_len, int *group_cipher,
 			int *pairwise_cipher)
 {
 	int i;
 	int left, count;
 	u8 *pos;

 	if (rsn_ie_len <= 0) {
 		/* No RSN IE - fail silently */
 		return -EINVAL;
 	}
 	if ((*rsn_ie != _WPA2_IE_ID_) ||
 	    (*(rsn_ie + 1) != (u8)(rsn_ie_len - 2)))
 		return -EINVAL;
 	pos = rsn_ie;
 	pos += 4;
 	left = rsn_ie_len - 4;
 	/*group_cipher*/
 	if (left >= RSN_SELECTOR_LEN) {
 		*group_cipher = r8712_get_wpa2_cipher_suite(pos);
 		pos += RSN_SELECTOR_LEN;
 		left -= RSN_SELECTOR_LEN;
 	} else if (left > 0) {
 		return -EINVAL;
 	}
 	/*pairwise_cipher*/
 	if (left >= 2) {
 		count = le16_to_cpu(*(__le16 *)pos);
 		pos += 2;
 		left -= 2;
 		if (count == 0 || left < count * RSN_SELECTOR_LEN)
 			return -EINVAL;
 		for (i = 0; i < count; i++) {
 			*pairwise_cipher |= r8712_get_wpa2_cipher_suite(pos);
 			pos += RSN_SELECTOR_LEN;
 			left -= RSN_SELECTOR_LEN;
 		}
 	} else if (left == 1) {
 		return -EINVAL;
 	}
 	return 0;
 }

 int r8712_get_sec_ie(u8 *in_ie, uint in_len, u8 *rsn_ie, u16 *rsn_len,
 		     u8 *wpa_ie, u16 *wpa_len)
 {
 	u8 authmode;
 	u8 wpa_oui[4] = {0x0, 0x50, 0xf2, 0x01};
 	uint cnt;

 	/*Search required WPA or WPA2 IE and copy to sec_ie[ ]*/
 	cnt = _TIMESTAMP_ + _BEACON_ITERVAL_ + _CAPABILITY_;
 	while (cnt < in_len) {
 		authmode = in_ie[cnt];
 		if ((authmode == _WPA_IE_ID_) &&
 		    (!memcmp(&in_ie[cnt + 2], &wpa_oui[0], 4))) {
 			memcpy(wpa_ie, &in_ie[cnt], in_ie[cnt + 1] + 2);
 			*wpa_len = in_ie[cnt + 1] + 2;
 			cnt += in_ie[cnt + 1] + 2;  /*get next */
 		} else {
 			if (authmode == _WPA2_IE_ID_) {
 				memcpy(rsn_ie, &in_ie[cnt],
 				       in_ie[cnt + 1] + 2);
 				*rsn_len = in_ie[cnt + 1] + 2;
 				cnt += in_ie[cnt + 1] + 2;  /*get next*/
 			} else {
 				cnt += in_ie[cnt + 1] + 2;   /*get next*/
 			}
 		}
 	}
 	return *rsn_len + *wpa_len;
 }

 int r8712_get_wps_ie(u8 *in_ie, uint in_len, u8 *wps_ie, uint *wps_ielen)
 {
 	int match;
 	uint cnt;
 	u8 eid, wps_oui[4] = {0x0, 0x50, 0xf2, 0x04};

 	cnt = 12;
 	match = false;
 	while (cnt < in_len) {
 		eid = in_ie[cnt];
 		if ((eid == _WPA_IE_ID_) &&
 		    (!memcmp(&in_ie[cnt + 2], wps_oui, 4))) {
 			memcpy(wps_ie, &in_ie[cnt], in_ie[cnt + 1] + 2);
 			*wps_ielen = in_ie[cnt + 1] + 2;
 			cnt += in_ie[cnt + 1] + 2;
 			match = true;
 			break;
 		}
 		cnt += in_ie[cnt + 1] + 2; /* goto next */
 	}
 	return match;
 }
	// SPDX-License-Identifier: GPL-2.0
	/******************************************************************************
	* ieee80211.c
	*
	* Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
	* Linux device driver for RTL8192SU
	*
	* Modifications for inclusion into the Linux staging tree are
	* Copyright(c) 2010 Larry Finger. All rights reserved.
	*
	* Contact information:
	* WLAN FAE <wlanfae@realtek.com>.
	* Larry Finger <Larry.Finger@lwfinger.net>
	*
	******************************************************************************/

	#define _IEEE80211_C

	#include "drv_types.h"
	#include "ieee80211.h"
	#include "wifi.h"
	#include "osdep_service.h"
	#include "wlan_bssdef.h"

	static const u8 WPA_OUI_TYPE[] = {0x00, 0x50, 0xf2, 1};
	static const u8 WPA_CIPHER_SUITE_NONE[] = {0x00, 0x50, 0xf2, 0};
	static const u8 WPA_CIPHER_SUITE_WEP40[] = {0x00, 0x50, 0xf2, 1};
	static const u8 WPA_CIPHER_SUITE_TKIP[] = {0x00, 0x50, 0xf2, 2};
	static const u8 WPA_CIPHER_SUITE_CCMP[] = {0x00, 0x50, 0xf2, 4};
	static const u8 WPA_CIPHER_SUITE_WEP104[] = {0x00, 0x50, 0xf2, 5};

	static const u8 RSN_CIPHER_SUITE_NONE[] = {0x00, 0x0f, 0xac, 0};
	static const u8 RSN_CIPHER_SUITE_WEP40[] = {0x00, 0x0f, 0xac, 1};
	static const u8 RSN_CIPHER_SUITE_TKIP[] = {0x00, 0x0f, 0xac, 2};
	static const u8 RSN_CIPHER_SUITE_CCMP[] = {0x00, 0x0f, 0xac, 4};
	static const u8 RSN_CIPHER_SUITE_WEP104[] = {0x00, 0x0f, 0xac, 5};

	/*-----------------------------------------------------------
	* for adhoc-master to generate ie and provide supported-rate to fw
	*-----------------------------------------------------------
	*/

	static u8 WIFI_CCKRATES[] = {
	(IEEE80211_CCK_RATE_1MB \| IEEE80211_BASIC_RATE_MASK),
	(IEEE80211_CCK_RATE_2MB \| IEEE80211_BASIC_RATE_MASK),
	(IEEE80211_CCK_RATE_5MB \| IEEE80211_BASIC_RATE_MASK),
	(IEEE80211_CCK_RATE_11MB \| IEEE80211_BASIC_RATE_MASK)
	};

	static u8 WIFI_OFDMRATES[] = {
	(IEEE80211_OFDM_RATE_6MB),
	(IEEE80211_OFDM_RATE_9MB),
	(IEEE80211_OFDM_RATE_12MB),
	(IEEE80211_OFDM_RATE_18MB),
	(IEEE80211_OFDM_RATE_24MB),
	(IEEE80211_OFDM_RATE_36MB),
	(IEEE80211_OFDM_RATE_48MB),
	(IEEE80211_OFDM_RATE_54MB)
	};

	uint r8712_is_cckrates_included(u8 *rate)
	{
	u32 i = 0;

	while (rate[i] != 0) {
	if ((((rate[i]) & 0x7f) == 2) \|\| (((rate[i]) & 0x7f) == 4) \|\|
	(((rate[i]) & 0x7f) == 11) \|\| (((rate[i]) & 0x7f) == 22))
	return true;
	i++;
	}
	return false;
	}

	uint r8712_is_cckratesonly_included(u8 *rate)
	{
	u32 i = 0;

	while (rate[i] != 0) {
	if ((((rate[i]) & 0x7f) != 2) && (((rate[i]) & 0x7f) != 4) &&
	(((rate[i]) & 0x7f) != 11) && (((rate[i]) & 0x7f) != 22))
	return false;
	i++;
	}
	return true;
	}

	/* r8712_set_ie will update frame length */
	u8 r8712_set_ie(u8 pbuf, sint index, uint len, u8 source, uint frlen)
	{
	*pbuf = (u8)index;
	*(pbuf + 1) = (u8)len;
	if (len > 0)
	memcpy((void )(pbuf + 2), (void )source, len);
	frlen = frlen + (len + 2);
	return pbuf + len + 2;
	}

	/* ---------------------------------------------------------------------------
	* index: the information element id index, limit is the limit for search
	* ---------------------------------------------------------------------------
	*/
	u8 r8712_get_ie(u8 pbuf, sint index, uint *len, sint limit)
	{
	sint tmp, i;
	u8 *p;

	if (limit < 1)
	return NULL;
	p = pbuf;
	i = 0;
	*len = 0;
	while (1) {
	if (*p == index) {
	len = (p + 1);
	return p;
	}
	tmp = *(p + 1);
	p += (tmp + 2);
	i += (tmp + 2);
	if (i >= limit)
	break;
	}
	return NULL;
	}

	static void set_supported_rate(u8 *rates, uint mode)
	{
	memset(rates, 0, NDIS_802_11_LENGTH_RATES_EX);
	switch (mode) {
	case WIRELESS_11B:
	memcpy(rates, WIFI_CCKRATES, IEEE80211_CCK_RATE_LEN);
	break;
	case WIRELESS_11G:
	case WIRELESS_11A:
	memcpy(rates, WIFI_OFDMRATES, IEEE80211_NUM_OFDM_RATESLEN);
	break;
	case WIRELESS_11BG:
	memcpy(rates, WIFI_CCKRATES, IEEE80211_CCK_RATE_LEN);
	memcpy(rates + IEEE80211_CCK_RATE_LEN, WIFI_OFDMRATES,
	IEEE80211_NUM_OFDM_RATESLEN);
	break;
	}
	}

	static uint r8712_get_rateset_len(u8 *rateset)
	{
	uint i = 0;

	while (1) {
	if ((rateset[i]) == 0)
	break;
	if (i > 12)
	break;
	i++;
	}
	return i;
	}

	int r8712_generate_ie(struct registry_priv *registrypriv)
	{
	int rate_len;
	uint sz = 0;
	struct wlan_bssid_ex *dev_network = &registrypriv->dev_network;
	u8 *ie = dev_network->IEs;
	u16 beaconPeriod = (u16)dev_network->Configuration.BeaconPeriod;

	/timestamp will be inserted by hardware/
	sz += 8;
	ie += sz;
	/beacon interval : 2bytes/
	(__le16 )ie = cpu_to_le16(beaconPeriod);
	sz += 2;
	ie += 2;
	/capability info/
	(u16 )ie = 0;
	(__le16 )ie \|= cpu_to_le16(WLAN_CAPABILITY_IBSS);
	if (registrypriv->preamble == PREAMBLE_SHORT)
	(__le16 )ie \|= cpu_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE);
	if (dev_network->Privacy)
	(__le16 )ie \|= cpu_to_le16(WLAN_CAPABILITY_PRIVACY);
	sz += 2;
	ie += 2;
	/SSID/
	ie = r8712_set_ie(ie, WLAN_EID_SSID, dev_network->Ssid.SsidLength,
	dev_network->Ssid.Ssid, &sz);
	/supported rates/
	set_supported_rate(dev_network->rates, registrypriv->wireless_mode);
	rate_len = r8712_get_rateset_len(dev_network->rates);
	if (rate_len > 8) {
	ie = r8712_set_ie(ie, WLAN_EID_SUPP_RATES, 8,
	dev_network->rates, &sz);
	ie = r8712_set_ie(ie, WLAN_EID_EXT_SUPP_RATES, (rate_len - 8),
	(dev_network->rates + 8), &sz);
	} else {
	ie = r8712_set_ie(ie, WLAN_EID_SUPP_RATES,
	rate_len, dev_network->rates, &sz);
	}
	/DS parameter set/
	ie = r8712_set_ie(ie, WLAN_EID_DS_PARAMS, 1,
	(u8 *)&dev_network->Configuration.DSConfig, &sz);
	/IBSS Parameter Set/
	ie = r8712_set_ie(ie, WLAN_EID_IBSS_PARAMS, 2,
	(u8 *)&dev_network->Configuration.ATIMWindow, &sz);
	return sz;
	}

	unsigned char r8712_get_wpa_ie(unsigned char ie, uint *wpa_ie_len, int limit)
	{
	u32 len;
	u16 val16;
	unsigned char wpa_oui_type[] = {0x00, 0x50, 0xf2, 0x01};
	u8 *buf = ie;

	while (1) {
	buf = r8712_get_ie(buf, _WPA_IE_ID_, &len, limit);
	if (buf) {
	/check if oui matches.../
	if (memcmp((buf + 2), wpa_oui_type,
	sizeof(wpa_oui_type)))
	goto check_next_ie;
	/check version.../
	memcpy((u8 *)&val16, (buf + 6), sizeof(val16));
	le16_to_cpus(&val16);
	if (val16 != 0x0001)
	goto check_next_ie;
	wpa_ie_len = (buf + 1);
	return buf;
	}
	*wpa_ie_len = 0;
	return NULL;
	check_next_ie:
	limit = limit - (buf - ie) - 2 - len;
	if (limit <= 0)
	break;
	buf += (2 + len);
	}
	*wpa_ie_len = 0;
	return NULL;
	}

	unsigned char r8712_get_wpa2_ie(unsigned char pie, uint *rsn_ie_len,
	int limit)
	{
	return r8712_get_ie(pie, _WPA2_IE_ID_, rsn_ie_len, limit);
	}

	static int r8712_get_wpa_cipher_suite(u8 *s)
	{
	if (!memcmp(s, (void *)WPA_CIPHER_SUITE_NONE, WPA_SELECTOR_LEN))
	return WPA_CIPHER_NONE;
	if (!memcmp(s, (void *)WPA_CIPHER_SUITE_WEP40, WPA_SELECTOR_LEN))
	return WPA_CIPHER_WEP40;
	if (!memcmp(s, (void *)WPA_CIPHER_SUITE_TKIP, WPA_SELECTOR_LEN))
	return WPA_CIPHER_TKIP;
	if (!memcmp(s, (void *)WPA_CIPHER_SUITE_CCMP, WPA_SELECTOR_LEN))
	return WPA_CIPHER_CCMP;
	if (!memcmp(s, (void *)WPA_CIPHER_SUITE_WEP104, WPA_SELECTOR_LEN))
	return WPA_CIPHER_WEP104;
	return 0;
	}

	static int r8712_get_wpa2_cipher_suite(u8 *s)
	{
	if (!memcmp(s, (void *)RSN_CIPHER_SUITE_NONE, RSN_SELECTOR_LEN))
	return WPA_CIPHER_NONE;
	if (!memcmp(s, (void *)RSN_CIPHER_SUITE_WEP40, RSN_SELECTOR_LEN))
	return WPA_CIPHER_WEP40;
	if (!memcmp(s, (void *)RSN_CIPHER_SUITE_TKIP, RSN_SELECTOR_LEN))
	return WPA_CIPHER_TKIP;
	if (!memcmp(s, (void *)RSN_CIPHER_SUITE_CCMP, RSN_SELECTOR_LEN))
	return WPA_CIPHER_CCMP;
	if (!memcmp(s, (void *)RSN_CIPHER_SUITE_WEP104, RSN_SELECTOR_LEN))
	return WPA_CIPHER_WEP104;
	return 0;
	}

	int r8712_parse_wpa_ie(u8 wpa_ie, int wpa_ie_len, int group_cipher,
	int *pairwise_cipher)
	{
	int i;
	int left, count;
	u8 *pos;

	if (wpa_ie_len <= 0) {
	/* No WPA IE - fail silently */
	return -EINVAL;
	}
	if ((*wpa_ie != _WPA_IE_ID_) \|\|
	(*(wpa_ie + 1) != (u8)(wpa_ie_len - 2)) \|\|
	(memcmp(wpa_ie + 2, (void *)WPA_OUI_TYPE, WPA_SELECTOR_LEN)))
	return -EINVAL;
	pos = wpa_ie;
	pos += 8;
	left = wpa_ie_len - 8;
	/group_cipher/
	if (left >= WPA_SELECTOR_LEN) {
	*group_cipher = r8712_get_wpa_cipher_suite(pos);
	pos += WPA_SELECTOR_LEN;
	left -= WPA_SELECTOR_LEN;
	} else if (left > 0) {
	return -EINVAL;
	}
	/pairwise_cipher/
	if (left >= 2) {
	count = le16_to_cpu((__le16 )pos);
	pos += 2;
	left -= 2;
	if (count == 0 \|\| left < count * WPA_SELECTOR_LEN)
	return -EINVAL;
	for (i = 0; i < count; i++) {
	*pairwise_cipher \|= r8712_get_wpa_cipher_suite(pos);
	pos += WPA_SELECTOR_LEN;
	left -= WPA_SELECTOR_LEN;
	}
	} else if (left == 1) {
	return -EINVAL;
	}
	return 0;
	}

	int r8712_parse_wpa2_ie(u8 rsn_ie, int rsn_ie_len, int group_cipher,
	int *pairwise_cipher)
	{
	int i;
	int left, count;
	u8 *pos;

	if (rsn_ie_len <= 0) {
	/* No RSN IE - fail silently */
	return -EINVAL;
	}
	if ((*rsn_ie != _WPA2_IE_ID_) \|\|
	(*(rsn_ie + 1) != (u8)(rsn_ie_len - 2)))
	return -EINVAL;
	pos = rsn_ie;
	pos += 4;
	left = rsn_ie_len - 4;
	/group_cipher/
	if (left >= RSN_SELECTOR_LEN) {
	*group_cipher = r8712_get_wpa2_cipher_suite(pos);
	pos += RSN_SELECTOR_LEN;
	left -= RSN_SELECTOR_LEN;
	} else if (left > 0) {
	return -EINVAL;
	}
	/pairwise_cipher/
	if (left >= 2) {
	count = le16_to_cpu((__le16 )pos);
	pos += 2;
	left -= 2;
	if (count == 0 \|\| left < count * RSN_SELECTOR_LEN)
	return -EINVAL;
	for (i = 0; i < count; i++) {
	*pairwise_cipher \|= r8712_get_wpa2_cipher_suite(pos);
	pos += RSN_SELECTOR_LEN;
	left -= RSN_SELECTOR_LEN;
	}
	} else if (left == 1) {
	return -EINVAL;
	}
	return 0;
	}

	int r8712_get_sec_ie(u8 in_ie, uint in_len, u8 rsn_ie, u16 *rsn_len,
	u8 wpa_ie, u16 wpa_len)
	{
	u8 authmode;
	u8 wpa_oui[4] = {0x0, 0x50, 0xf2, 0x01};
	uint cnt;

	/Search required WPA or WPA2 IE and copy to sec_ie[ ]/
	cnt = _TIMESTAMP_ + _BEACON_ITERVAL_ + _CAPABILITY_;
	while (cnt < in_len) {
	authmode = in_ie[cnt];
	if ((authmode == _WPA_IE_ID_) &&
	(!memcmp(&in_ie[cnt + 2], &wpa_oui[0], 4))) {
	memcpy(wpa_ie, &in_ie[cnt], in_ie[cnt + 1] + 2);
	*wpa_len = in_ie[cnt + 1] + 2;
	cnt += in_ie[cnt + 1] + 2; /get next /
	} else {
	if (authmode == _WPA2_IE_ID_) {
	memcpy(rsn_ie, &in_ie[cnt],
	in_ie[cnt + 1] + 2);
	*rsn_len = in_ie[cnt + 1] + 2;
	cnt += in_ie[cnt + 1] + 2; /get next/
	} else {
	cnt += in_ie[cnt + 1] + 2; /get next/
	}
	}
	}
	return rsn_len + wpa_len;
	}

	int r8712_get_wps_ie(u8 in_ie, uint in_len, u8 wps_ie, uint *wps_ielen)
	{
	int match;
	uint cnt;
	u8 eid, wps_oui[4] = {0x0, 0x50, 0xf2, 0x04};

	cnt = 12;
	match = false;
	while (cnt < in_len) {
	eid = in_ie[cnt];
	if ((eid == _WPA_IE_ID_) &&
	(!memcmp(&in_ie[cnt + 2], wps_oui, 4))) {
	memcpy(wps_ie, &in_ie[cnt], in_ie[cnt + 1] + 2);
	*wps_ielen = in_ie[cnt + 1] + 2;
	cnt += in_ie[cnt + 1] + 2;
	match = true;
	break;
	}
	cnt += in_ie[cnt + 1] + 2; /* goto next */
	}
	return match;
	}