staging: r8712u: Add the new driver to the mainline kernel

This code is for a completely new version of the Realtek 8192 USB devices
such as the D-Link DWA-130. The Realtek code, which was originally for
Linux, Windows XP and Windows CE, has been stripped of all code not needed
for Linux. In addition, only one additional configuration variable, which
enables AP mode, remains.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Florian Schilhabel <florian.c.schilhabel@googlemail.com>
Tested-by: Frederic Leroy <fredo@starox.org>

1 files changed, 454 insertions, 0 deletions

diff --git a/drivers/staging/rtl8712/ieee80211.c b/drivers/staging/rtl8712/ieee80211.c
new file mode 100644
index 000000000000..f06addcf063e
--- /dev/null
+++ b/drivers/staging/rtl8712/ieee80211.c
@@ -0,0 +1,454 @@
+/******************************************************************************
+ * ieee80211.c
+ *
+ * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
+ * Linux device driver for RTL8192SU
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
+ *
+ * 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, sint *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;
+		} else {
+			tmp = *(p + 1);
+			p += (tmp + 2);
+			i += (tmp + 2);
+		}
+		if (i >= limit)
+			break;
+	}
+	return NULL;
+}
+
+static void set_supported_rate(u8 *SupportedRates, uint mode)
+{
+	memset(SupportedRates, 0, NDIS_802_11_LENGTH_RATES_EX);
+	switch (mode) {
+	case WIRELESS_11B:
+		memcpy(SupportedRates, WIFI_CCKRATES,
+			IEEE80211_CCK_RATE_LEN);
+		break;
+	case WIRELESS_11G:
+	case WIRELESS_11A:
+		memcpy(SupportedRates, WIFI_OFDMRATES,
+			IEEE80211_NUM_OFDM_RATESLEN);
+		break;
+	case WIRELESS_11BG:
+		memcpy(SupportedRates, WIFI_CCKRATES, IEEE80211_CCK_RATE_LEN);
+		memcpy(SupportedRates + 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 *pregistrypriv,
+		      struct _adapter *padapter)
+{
+	int sz = 0, rateLen;
+	struct wlan_bssid_ex *pdev_network = &pregistrypriv->dev_network;
+	u8 *ie = pdev_network->IEs;
+	struct ieee80211_ht_cap ht_capie;
+	struct ieee80211_ht_addt_info ht_addt_info;
+	unsigned char WMM_IE[] = {0x00, 0x50, 0xf2, 0x02, 0x00, 0x01, 0x00};
+	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
+	struct qos_priv *pqospriv = &pmlmepriv->qospriv;
+
+	/*timestamp will be inserted by hardware*/
+	sz += 8;
+	ie += sz;
+	/*beacon interval : 2bytes*/
+	*(u16 *)ie = cpu_to_le16((u16)pdev_network->Configuration.BeaconPeriod);
+	sz += 2;
+	ie += 2;
+	/*capability info*/
+	*(u16 *)ie = 0;
+	*(u16 *)ie |= cpu_to_le16(cap_IBSS);
+	if (pregistrypriv->preamble == PREAMBLE_SHORT)
+		*(u16 *)ie |= cpu_to_le16(cap_ShortPremble);
+	if (pdev_network->Privacy)
+		*(u16 *)ie |= cpu_to_le16(cap_Privacy);
+	sz += 2;
+	ie += 2;
+	/*SSID*/
+	ie = r8712_set_ie(ie, _SSID_IE_, pdev_network->Ssid.SsidLength,
+		    pdev_network->Ssid.Ssid, &sz);
+	/*supported rates*/
+	set_supported_rate(pdev_network->SupportedRates,
+			   pregistrypriv->wireless_mode);
+	rateLen = r8712_get_rateset_len(pdev_network->SupportedRates);
+	if (rateLen > 8) {
+		ie = r8712_set_ie(ie, _SUPPORTEDRATES_IE_, 8,
+			    pdev_network->SupportedRates, &sz);
+		ie = r8712_set_ie(ie, _EXT_SUPPORTEDRATES_IE_, (rateLen - 8),
+			    (pdev_network->SupportedRates + 8), &sz);
+	} else
+		ie = r8712_set_ie(ie, _SUPPORTEDRATES_IE_,
+			    rateLen, pdev_network->SupportedRates, &sz);
+	/*DS parameter set*/
+	ie = r8712_set_ie(ie, _DSSET_IE_, 1,
+		    (u8 *)&(pdev_network->Configuration.DSConfig), &sz);
+	/*IBSS Parameter Set*/
+	ie = r8712_set_ie(ie, _IBSS_PARA_IE_, 2,
+		    (u8 *)&(pdev_network->Configuration.ATIMWindow), &sz);
+	if (pregistrypriv->ht_enable == 1) {
+		if (pqospriv->qos_option == 0) {
+			ie = r8712_set_ie(ie, _VENDOR_SPECIFIC_IE_,
+					   _WMM_IE_Length_, WMM_IE, &sz);
+			pqospriv->qos_option = 1;
+		}
+		memset(&ht_capie, 0, sizeof(struct ieee80211_ht_cap));
+		ht_capie.cap_info = IEEE80211_HT_CAP_SUP_WIDTH |
+				    IEEE80211_HT_CAP_SGI_20 |
+				    IEEE80211_HT_CAP_SGI_40 |
+				    IEEE80211_HT_CAP_TX_STBC |
+				    IEEE80211_HT_CAP_MAX_AMSDU |
+				    IEEE80211_HT_CAP_DSSSCCK40;
+		ht_capie.ampdu_params_info = (IEEE80211_HT_CAP_AMPDU_FACTOR &
+				0x03) | (IEEE80211_HT_CAP_AMPDU_DENSITY & 0x00);
+		ie = r8712_set_ie(ie, _HT_CAPABILITY_IE_,
+			    sizeof(struct ieee80211_ht_cap),
+			    (unsigned char *)&ht_capie, &sz);
+		/*add HT info ie*/
+		memset(&ht_addt_info, 0,
+			sizeof(struct ieee80211_ht_addt_info));
+		/*need to add the HT additional IEs*/
+		ht_addt_info.control_chan = pregistrypriv->channel;
+		ie = r8712_set_ie(ie, _HT_ADD_INFO_IE_,
+			    sizeof(struct ieee80211_ht_addt_info),
+			    (unsigned char *)&ht_addt_info, &sz);
+	}
+	return sz;
+}
+
+unsigned char *r8712_get_wpa_ie(unsigned char *pie, int *wpa_ie_len, int limit)
+{
+	int len;
+	u16 val16;
+	unsigned char wpa_oui_type[] = {0x00, 0x50, 0xf2, 0x01};
+	u8 *pbuf = pie;
+
+	while (1) {
+		pbuf = r8712_get_ie(pbuf, _WPA_IE_ID_, &len, limit);
+		if (pbuf) {
+			/*check if oui matches...*/
+			if (memcmp((pbuf + 2), wpa_oui_type,
+			    sizeof(wpa_oui_type)))
+				goto check_next_ie;
+			/*check version...*/
+			memcpy((u8 *)&val16, (pbuf + 6), sizeof(val16));
+			val16 = le16_to_cpu(val16);
+			if (val16 != 0x0001)
+				goto check_next_ie;
+			*wpa_ie_len = *(pbuf + 1);
+			return pbuf;
+		} else {
+			*wpa_ie_len = 0;
+			return NULL;
+		}
+check_next_ie:
+		limit = limit - (pbuf - pie) - 2 - len;
+		if (limit <= 0)
+			break;
+		pbuf += (2 + len);
+	}
+	*wpa_ie_len = 0;
+	return NULL;
+}
+
+unsigned char *r8712_get_wpa2_ie(unsigned char *pie, int *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, ret = _SUCCESS;
+	int left, count;
+	u8 *pos;
+
+	if (wpa_ie_len <= 0) {
+		/* No WPA IE - fail silently */
+		return _FAIL;
+	}
+	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 _FAIL;
+	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 _FAIL;
+	/*pairwise_cipher*/
+	if (left >= 2) {
+		count = le16_to_cpu(*(u16 *)pos);
+		pos += 2;
+		left -= 2;
+		if (count == 0 || left < count * WPA_SELECTOR_LEN)
+			return _FAIL;
+		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 _FAIL;
+	return ret;
+}
+
+int r8712_parse_wpa2_ie(u8 *rsn_ie, int rsn_ie_len, int *group_cipher,
+		  int *pairwise_cipher)
+{
+	int i, ret = _SUCCESS;
+	int left, count;
+	u8 *pos;
+
+	if (rsn_ie_len <= 0) {
+		/* No RSN IE - fail silently */
+		return _FAIL;
+	}
+	if ((*rsn_ie != _WPA2_IE_ID_) || (*(rsn_ie+1) != (u8)(rsn_ie_len - 2)))
+		return _FAIL;
+	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 _FAIL;
+	/*pairwise_cipher*/
+	if (left >= 2) {
+		count = le16_to_cpu(*(u16 *)pos);
+		pos += 2;
+		left -= 2;
+		if (count == 0 || left < count * RSN_SELECTOR_LEN)
+			return _FAIL;
+		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 _FAIL;
+	return ret;
+}
+
+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, sec_idx;
+	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_);
+	sec_idx = 0;
+	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;
+		} else
+			cnt += in_ie[cnt+1]+2; /* goto next */
+	}
+	return match;
+}