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path: root/drivers/staging/rtl8712/ieee80211.c
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Diffstat (limited to 'drivers/staging/rtl8712/ieee80211.c')
-rw-r--r--drivers/staging/rtl8712/ieee80211.c454
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 00000000000..f06addcf063
--- /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;
+}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-12 12:46:29 +0000