diff options
Diffstat (limited to 'drivers/staging/rtl8188eu/core/rtw_ieee80211.c')
| -rw-r--r-- | drivers/staging/rtl8188eu/core/rtw_ieee80211.c | 1084 |
1 files changed, 1084 insertions, 0 deletions
diff --git a/drivers/staging/rtl8188eu/core/rtw_ieee80211.c b/drivers/staging/rtl8188eu/core/rtw_ieee80211.c new file mode 100644 index 0000000..7d5cbaf --- /dev/null +++ b/drivers/staging/rtl8188eu/core/rtw_ieee80211.c @@ -0,0 +1,1084 @@ +// SPDX-License-Identifier: GPL-2.0 +/****************************************************************************** + * + * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved. + * + ******************************************************************************/ +#define _IEEE80211_C + +#include <linux/ieee80211.h> + +#include <drv_types.h> +#include <osdep_intf.h> +#include <ieee80211.h> +#include <wifi.h> +#include <osdep_service.h> +#include <wlan_bssdef.h> + +u8 RTW_WPA_OUI_TYPE[] = { 0x00, 0x50, 0xf2, 1 }; +u8 WPA_AUTH_KEY_MGMT_NONE[] = { 0x00, 0x50, 0xf2, 0 }; +u8 WPA_AUTH_KEY_MGMT_UNSPEC_802_1X[] = { 0x00, 0x50, 0xf2, 1 }; +u8 WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X[] = { 0x00, 0x50, 0xf2, 2 }; +u8 WPA_CIPHER_SUITE_NONE[] = { 0x00, 0x50, 0xf2, 0 }; +u8 WPA_CIPHER_SUITE_WEP40[] = { 0x00, 0x50, 0xf2, 1 }; +u8 WPA_CIPHER_SUITE_TKIP[] = { 0x00, 0x50, 0xf2, 2 }; +u8 WPA_CIPHER_SUITE_WRAP[] = { 0x00, 0x50, 0xf2, 3 }; +u8 WPA_CIPHER_SUITE_CCMP[] = { 0x00, 0x50, 0xf2, 4 }; +u8 WPA_CIPHER_SUITE_WEP104[] = { 0x00, 0x50, 0xf2, 5 }; + +u16 RSN_VERSION_BSD = 1; +u8 RSN_AUTH_KEY_MGMT_UNSPEC_802_1X[] = { 0x00, 0x0f, 0xac, 1 }; +u8 RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X[] = { 0x00, 0x0f, 0xac, 2 }; +u8 RSN_CIPHER_SUITE_NONE[] = { 0x00, 0x0f, 0xac, 0 }; +u8 RSN_CIPHER_SUITE_WEP40[] = { 0x00, 0x0f, 0xac, 1 }; +u8 RSN_CIPHER_SUITE_TKIP[] = { 0x00, 0x0f, 0xac, 2 }; +u8 RSN_CIPHER_SUITE_WRAP[] = { 0x00, 0x0f, 0xac, 3 }; +u8 RSN_CIPHER_SUITE_CCMP[] = { 0x00, 0x0f, 0xac, 4 }; +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 +}; + +int rtw_get_bit_value_from_ieee_value(u8 val) +{ + unsigned char dot11_rate_table[] = { + 2, 4, 11, 22, 12, 18, 24, 36, 48, + 72, 96, 108, 0}; /* last element must be zero!! */ + int i = 0; + + while (dot11_rate_table[i] != 0) { + if (dot11_rate_table[i] == val) + return BIT(i); + i++; + } + return 0; +} + +bool rtw_is_cckrates_included(u8 *rate) +{ + while (*rate) { + u8 r = *rate & 0x7f; + + if (r == 2 || r == 4 || r == 11 || r == 22) + return true; + rate++; + } + + return false; +} + +bool rtw_is_cckratesonly_included(u8 *rate) +{ + while (*rate) { + u8 r = *rate & 0x7f; + + if (r != 2 && r != 4 && r != 11 && r != 22) + return false; + rate++; + } + + return true; +} + +int rtw_check_network_type(unsigned char *rate, int ratelen, int channel) +{ + if (channel > 14) { + if (rtw_is_cckrates_included(rate)) + return WIRELESS_INVALID; + else + return WIRELESS_11A; + } else { /* could be pure B, pure G, or B/G */ + if (rtw_is_cckratesonly_included(rate)) + return WIRELESS_11B; + else if (rtw_is_cckrates_included(rate)) + return WIRELESS_11BG; + else + return WIRELESS_11G; + } +} + +u8 *rtw_set_fixed_ie(void *pbuf, unsigned int len, void *source, + unsigned int *frlen) +{ + memcpy(pbuf, source, len); + *frlen = *frlen + len; + return ((u8 *)pbuf) + len; +} + +/* rtw_set_ie will update frame length */ +u8 *rtw_set_ie +( + u8 *pbuf, + int index, + uint len, + u8 *source, + uint *frlen /* frame length */ +) +{ + *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 *rtw_get_ie(u8 *pbuf, int index, uint *len, int limit) +{ + int 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; +} + +void rtw_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: + case WIRELESS_11_5N: + case WIRELESS_11A_5N:/* Todo: no basic rate for ofdm ? */ + memcpy(SupportedRates, WIFI_OFDMRATES, IEEE80211_NUM_OFDM_RATESLEN); + break; + case WIRELESS_11BG: + case WIRELESS_11G_24N: + case WIRELESS_11_24N: + case WIRELESS_11BG_24N: + memcpy(SupportedRates, WIFI_CCKRATES, IEEE80211_CCK_RATE_LEN); + memcpy(SupportedRates + IEEE80211_CCK_RATE_LEN, WIFI_OFDMRATES, IEEE80211_NUM_OFDM_RATESLEN); + break; + } +} + +uint rtw_get_rateset_len(u8 *rateset) +{ + uint i; + + for (i = 0; i < 13; i++) + if (rateset[i] == 0) + break; + return i; +} + +int rtw_generate_ie(struct registry_priv *pregistrypriv) +{ + u8 wireless_mode; + int rateLen; + uint sz = 0; + struct wlan_bssid_ex *pdev_network = &pregistrypriv->dev_network; + u8 *ie = pdev_network->ies; + + /* timestamp will be inserted by hardware */ + sz += 8; + ie += sz; + + /* beacon interval : 2bytes */ + *(__le16 *)ie = cpu_to_le16((u16)pdev_network->Configuration.BeaconPeriod);/* BCN_INTERVAL; */ + sz += 2; + ie += 2; + + /* capability info */ + *(u16 *)ie = 0; + + *(__le16 *)ie |= cpu_to_le16(cap_IBSS); + + if (pregistrypriv->preamble == PREAMBLE_SHORT) + *(__le16 *)ie |= cpu_to_le16(cap_ShortPremble); + + if (pdev_network->Privacy) + *(__le16 *)ie |= cpu_to_le16(cap_Privacy); + + sz += 2; + ie += 2; + + /* SSID */ + ie = rtw_set_ie(ie, _SSID_IE_, pdev_network->Ssid.SsidLength, pdev_network->Ssid.Ssid, &sz); + + /* supported rates */ + if (pregistrypriv->wireless_mode == WIRELESS_11ABGN) { + if (pdev_network->Configuration.DSConfig > 14) + wireless_mode = WIRELESS_11A_5N; + else + wireless_mode = WIRELESS_11BG_24N; + } else { + wireless_mode = pregistrypriv->wireless_mode; + } + + rtw_set_supported_rate(pdev_network->SupportedRates, wireless_mode); + + rateLen = rtw_get_rateset_len(pdev_network->SupportedRates); + + if (rateLen > 8) { + ie = rtw_set_ie(ie, _SUPPORTEDRATES_IE_, 8, pdev_network->SupportedRates, &sz); + /* ie = rtw_set_ie(ie, _EXT_SUPPORTEDRATES_IE_, (rateLen - 8), (pdev_network->SupportedRates + 8), &sz); */ + } else { + ie = rtw_set_ie(ie, _SUPPORTEDRATES_IE_, rateLen, pdev_network->SupportedRates, &sz); + } + + /* DS parameter set */ + ie = rtw_set_ie(ie, _DSSET_IE_, 1, (u8 *)&(pdev_network->Configuration.DSConfig), &sz); + + /* IBSS Parameter Set */ + + ie = rtw_set_ie(ie, _IBSS_PARA_IE_, 2, (u8 *)&(pdev_network->Configuration.ATIMWindow), &sz); + + if (rateLen > 8) + ie = rtw_set_ie(ie, _EXT_SUPPORTEDRATES_IE_, (rateLen - 8), (pdev_network->SupportedRates + 8), &sz); + + return sz; +} + +unsigned char *rtw_get_wpa_ie(unsigned char *pie, uint *wpa_ie_len, int limit) +{ + uint len; + u16 val16; + __le16 le_tmp; + unsigned char wpa_oui_type[] = {0x00, 0x50, 0xf2, 0x01}; + u8 *pbuf = pie; + int limit_new = limit; + + while (1) { + pbuf = rtw_get_ie(pbuf, _WPA_IE_ID_, &len, limit_new); + + if (pbuf) { + /* check if oui matches... */ + if (!memcmp((pbuf + 2), wpa_oui_type, sizeof(wpa_oui_type)) == false) + goto check_next_ie; + + /* check version... */ + memcpy((u8 *)&le_tmp, (pbuf + 6), sizeof(val16)); + + val16 = le16_to_cpu(le_tmp); + 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_new = limit - (pbuf - pie) - 2 - len; + if (limit_new <= 0) + break; + pbuf += (2 + len); + } + *wpa_ie_len = 0; + return NULL; +} + +unsigned char *rtw_get_wpa2_ie(unsigned char *pie, uint *rsn_ie_len, int limit) +{ + return rtw_get_ie(pie, _WPA2_IE_ID_, rsn_ie_len, limit); +} + +int rtw_get_wpa_cipher_suite(u8 *s) +{ + if (!memcmp(s, WPA_CIPHER_SUITE_NONE, WPA_SELECTOR_LEN)) + return WPA_CIPHER_NONE; + if (!memcmp(s, WPA_CIPHER_SUITE_WEP40, WPA_SELECTOR_LEN)) + return WPA_CIPHER_WEP40; + if (!memcmp(s, WPA_CIPHER_SUITE_TKIP, WPA_SELECTOR_LEN)) + return WPA_CIPHER_TKIP; + if (!memcmp(s, WPA_CIPHER_SUITE_CCMP, WPA_SELECTOR_LEN)) + return WPA_CIPHER_CCMP; + if (!memcmp(s, WPA_CIPHER_SUITE_WEP104, WPA_SELECTOR_LEN)) + return WPA_CIPHER_WEP104; + + return 0; +} + +int rtw_get_wpa2_cipher_suite(u8 *s) +{ + if (!memcmp(s, RSN_CIPHER_SUITE_NONE, RSN_SELECTOR_LEN)) + return WPA_CIPHER_NONE; + if (!memcmp(s, RSN_CIPHER_SUITE_WEP40, RSN_SELECTOR_LEN)) + return WPA_CIPHER_WEP40; + if (!memcmp(s, RSN_CIPHER_SUITE_TKIP, RSN_SELECTOR_LEN)) + return WPA_CIPHER_TKIP; + if (!memcmp(s, RSN_CIPHER_SUITE_CCMP, RSN_SELECTOR_LEN)) + return WPA_CIPHER_CCMP; + if (!memcmp(s, RSN_CIPHER_SUITE_WEP104, RSN_SELECTOR_LEN)) + return WPA_CIPHER_WEP104; + + return 0; +} + +int rtw_parse_wpa_ie(u8 *wpa_ie, int wpa_ie_len, int *group_cipher, int *pairwise_cipher, int *is_8021x) +{ + int i, ret = _SUCCESS; + int left, count; + u8 *pos; + u8 SUITE_1X[4] = {0x00, 0x50, 0xf2, 1}; + + 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, RTW_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 = rtw_get_wpa_cipher_suite(pos); + pos += WPA_SELECTOR_LEN; + left -= WPA_SELECTOR_LEN; + } else if (left > 0) { + RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie length mismatch, %u too much", __func__, left)); + return _FAIL; + } + + /* pairwise_cipher */ + if (left >= 2) { + count = get_unaligned_le16(pos); + pos += 2; + left -= 2; + + if (count == 0 || left < count * WPA_SELECTOR_LEN) { + RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie count botch (pairwise), " + "count %u left %u", __func__, count, left)); + return _FAIL; + } + + for (i = 0; i < count; i++) { + *pairwise_cipher |= rtw_get_wpa_cipher_suite(pos); + + pos += WPA_SELECTOR_LEN; + left -= WPA_SELECTOR_LEN; + } + } else if (left == 1) { + RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie too short (for key mgmt)", __func__)); + return _FAIL; + } + + if (is_8021x) { + if (left >= 6) { + pos += 2; + if (!memcmp(pos, SUITE_1X, 4)) { + RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s : there has 802.1x auth\n", __func__)); + *is_8021x = 1; + } + } + } + + return ret; +} + +int rtw_parse_wpa2_ie(u8 *rsn_ie, int rsn_ie_len, int *group_cipher, int *pairwise_cipher, int *is_8021x) +{ + int i, ret = _SUCCESS; + int left, count; + u8 *pos; + u8 SUITE_1X[4] = {0x00, 0x0f, 0xac, 0x01}; + + 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 = rtw_get_wpa2_cipher_suite(pos); + + pos += RSN_SELECTOR_LEN; + left -= RSN_SELECTOR_LEN; + + } else if (left > 0) { + RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie length mismatch, %u too much", __func__, left)); + return _FAIL; + } + + /* pairwise_cipher */ + if (left >= 2) { + count = get_unaligned_le16(pos); + pos += 2; + left -= 2; + + if (count == 0 || left < count * RSN_SELECTOR_LEN) { + RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie count botch (pairwise), " + "count %u left %u", __func__, count, left)); + return _FAIL; + } + + for (i = 0; i < count; i++) { + *pairwise_cipher |= rtw_get_wpa2_cipher_suite(pos); + + pos += RSN_SELECTOR_LEN; + left -= RSN_SELECTOR_LEN; + } + + } else if (left == 1) { + RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("%s: ie too short (for key mgmt)", __func__)); + + return _FAIL; + } + + if (is_8021x) { + if (left >= 6) { + pos += 2; + if (!memcmp(pos, SUITE_1X, 4)) { + RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s (): there has 802.1x auth\n", __func__)); + *is_8021x = 1; + } + } + } + return ret; +} + +int rtw_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, i; + 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))) { + RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, + ("\n rtw_get_wpa_ie: sec_idx =%d in_ie[cnt+1]+2 =%d\n", + sec_idx, in_ie[cnt + 1] + 2)); + + if (wpa_ie) { + memcpy(wpa_ie, &in_ie[cnt], in_ie[cnt + 1] + 2); + + for (i = 0; i < (in_ie[cnt + 1] + 2); i += 8) { + RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, + ("\n %2x,%2x,%2x,%2x,%2x,%2x,%2x,%2x\n", + wpa_ie[i], wpa_ie[i + 1], wpa_ie[i + 2], wpa_ie[i + 3], wpa_ie[i + 4], + wpa_ie[i + 5], wpa_ie[i + 6], wpa_ie[i + 7])); + } + } + + *wpa_len = in_ie[cnt + 1] + 2; + cnt += in_ie[cnt + 1] + 2; /* get next */ + } else { + if (authmode == _WPA2_IE_ID_) { + RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, + ("\n get_rsn_ie: sec_idx =%d in_ie[cnt+1]+2 =%d\n", + sec_idx, in_ie[cnt + 1] + 2)); + + if (rsn_ie) { + memcpy(rsn_ie, &in_ie[cnt], in_ie[cnt + 1] + 2); + + for (i = 0; i < (in_ie[cnt + 1] + 2); i += 8) { + RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, + ("\n %2x,%2x,%2x,%2x,%2x,%2x,%2x,%2x\n", + rsn_ie[i], rsn_ie[i + 1], rsn_ie[i + 2], rsn_ie[i + 3], rsn_ie[i + 4], + rsn_ie[i + 5], rsn_ie[i + 6], rsn_ie[i + 7])); + } + } + + *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; +} + +u8 rtw_is_wps_ie(u8 *ie_ptr, uint *wps_ielen) +{ + u8 match = false; + u8 eid, wps_oui[4] = {0x0, 0x50, 0xf2, 0x04}; + + if (!ie_ptr) + return match; + + eid = ie_ptr[0]; + + if ((eid == _WPA_IE_ID_) && (!memcmp(&ie_ptr[2], wps_oui, 4))) { + *wps_ielen = ie_ptr[1] + 2; + match = true; + } + return match; +} + +/** + * rtw_get_wps_ie - Search WPS IE from a series of ies + * @in_ie: Address of ies to search + * @in_len: Length limit from in_ie + * @wps_ie: If not NULL and WPS IE is found, WPS IE will be copied to the buf starting from wps_ie + * @wps_ielen: If not NULL and WPS IE is found, will set to the length of the entire WPS IE + * + * Returns: The address of the WPS IE found, or NULL + */ +u8 *rtw_get_wps_ie(u8 *in_ie, uint in_len, u8 *wps_ie, uint *wps_ielen) +{ + uint cnt; + u8 *wpsie_ptr = NULL; + u8 eid, wps_oui[4] = {0x0, 0x50, 0xf2, 0x04}; + + if (wps_ielen) + *wps_ielen = 0; + + if (!in_ie || in_len <= 0) + return wpsie_ptr; + + cnt = 0; + + while (cnt < in_len) { + eid = in_ie[cnt]; + + if ((eid == _WPA_IE_ID_) && (!memcmp(&in_ie[cnt + 2], wps_oui, 4))) { + wpsie_ptr = &in_ie[cnt]; + + if (wps_ie) + memcpy(wps_ie, &in_ie[cnt], in_ie[cnt + 1] + 2); + + if (wps_ielen) + *wps_ielen = in_ie[cnt + 1] + 2; + + cnt += in_ie[cnt + 1] + 2; + + break; + } else { + cnt += in_ie[cnt + 1] + 2; /* goto next */ + } + } + return wpsie_ptr; +} + +/** + * rtw_get_wps_attr - Search a specific WPS attribute from a given WPS IE + * @wps_ie: Address of WPS IE to search + * @wps_ielen: Length limit from wps_ie + * @target_attr_id: The attribute ID of WPS attribute to search + * @buf_attr: If not NULL and the WPS attribute is found, WPS attribute will be copied to the buf starting from buf_attr + * @len_attr: If not NULL and the WPS attribute is found, will set to the length of the entire WPS attribute + * + * Returns: the address of the specific WPS attribute found, or NULL + */ +u8 *rtw_get_wps_attr(u8 *wps_ie, uint wps_ielen, u16 target_attr_id, u8 *buf_attr, u32 *len_attr) +{ + u8 *attr_ptr = NULL; + u8 *target_attr_ptr = NULL; + u8 wps_oui[4] = {0x00, 0x50, 0xF2, 0x04}; + + if (len_attr) + *len_attr = 0; + + if ((wps_ie[0] != _VENDOR_SPECIFIC_IE_) || + (memcmp(wps_ie + 2, wps_oui, 4))) + return attr_ptr; + + /* 6 = 1(Element ID) + 1(Length) + 4(WPS OUI) */ + attr_ptr = wps_ie + 6; /* goto first attr */ + + while (attr_ptr - wps_ie < wps_ielen) { + /* 4 = 2(Attribute ID) + 2(Length) */ + u16 attr_id = get_unaligned_be16(attr_ptr); + u16 attr_data_len = get_unaligned_be16(attr_ptr + 2); + u16 attr_len = attr_data_len + 4; + + if (attr_id == target_attr_id) { + target_attr_ptr = attr_ptr; + if (buf_attr) + memcpy(buf_attr, attr_ptr, attr_len); + if (len_attr) + *len_attr = attr_len; + break; + } else { + attr_ptr += attr_len; /* goto next */ + } + } + return target_attr_ptr; +} + +/** + * rtw_get_wps_attr_content - Search a specific WPS attribute content from a given WPS IE + * @wps_ie: Address of WPS IE to search + * @wps_ielen: Length limit from wps_ie + * @target_attr_id: The attribute ID of WPS attribute to search + * @buf_content: If not NULL and the WPS attribute is found, WPS attribute content will be copied to the buf starting from buf_content + * @len_content: If not NULL and the WPS attribute is found, will set to the length of the WPS attribute content + * + * Returns: the address of the specific WPS attribute content found, or NULL + */ +u8 *rtw_get_wps_attr_content(u8 *wps_ie, uint wps_ielen, u16 target_attr_id, u8 *buf_content, uint *len_content) +{ + u8 *attr_ptr; + u32 attr_len; + + if (len_content) + *len_content = 0; + + attr_ptr = rtw_get_wps_attr(wps_ie, wps_ielen, target_attr_id, NULL, &attr_len); + + if (attr_ptr && attr_len) { + if (buf_content) + memcpy(buf_content, attr_ptr + 4, attr_len - 4); + + if (len_content) + *len_content = attr_len - 4; + + return attr_ptr + 4; + } + + return NULL; +} + +static int rtw_ieee802_11_parse_vendor_specific(u8 *pos, uint elen, + struct rtw_ieee802_11_elems *elems, + int show_errors) +{ + unsigned int oui; + + /* first 3 bytes in vendor specific information element are the IEEE + * OUI of the vendor. The following byte is used a vendor specific + * sub-type. */ + if (elen < 4) { + if (show_errors) { + DBG_88E("short vendor specific information element ignored (len=%lu)\n", + (unsigned long)elen); + } + return -1; + } + + oui = RTW_GET_BE24(pos); + switch (oui) { + case OUI_MICROSOFT: + /* Microsoft/Wi-Fi information elements are further typed and + * subtyped */ + switch (pos[3]) { + case 1: + /* Microsoft OUI (00:50:F2) with OUI Type 1: + * real WPA information element */ + elems->wpa_ie = pos; + elems->wpa_ie_len = elen; + break; + case WME_OUI_TYPE: /* this is a Wi-Fi WME info. element */ + if (elen < 5) { + DBG_88E("short WME information element ignored (len=%lu)\n", + (unsigned long)elen); + return -1; + } + switch (pos[4]) { + case WME_OUI_SUBTYPE_INFORMATION_ELEMENT: + case WME_OUI_SUBTYPE_PARAMETER_ELEMENT: + elems->wme = pos; + elems->wme_len = elen; + break; + case WME_OUI_SUBTYPE_TSPEC_ELEMENT: + elems->wme_tspec = pos; + elems->wme_tspec_len = elen; + break; + default: + DBG_88E("unknown WME information element ignored (subtype=%d len=%lu)\n", + pos[4], (unsigned long)elen); + return -1; + } + break; + case 4: + /* Wi-Fi Protected Setup (WPS) IE */ + elems->wps_ie = pos; + elems->wps_ie_len = elen; + break; + default: + DBG_88E("Unknown Microsoft information element ignored (type=%d len=%lu)\n", + pos[3], (unsigned long)elen); + return -1; + } + break; + + case OUI_BROADCOM: + switch (pos[3]) { + case VENDOR_HT_CAPAB_OUI_TYPE: + elems->vendor_ht_cap = pos; + elems->vendor_ht_cap_len = elen; + break; + default: + DBG_88E("Unknown Broadcom information element ignored (type=%d len=%lu)\n", + pos[3], (unsigned long)elen); + return -1; + } + break; + default: + DBG_88E("unknown vendor specific information element ignored (vendor OUI %3phC len=%lu)\n", + pos, (unsigned long)elen); + return -1; + } + return 0; +} + +/** + * ieee802_11_parse_elems - Parse information elements in management frames + * @start: Pointer to the start of ies + * @len: Length of IE buffer in octets + * @elems: Data structure for parsed elements + * @show_errors: Whether to show parsing errors in debug log + * Returns: Parsing result + */ +enum parse_res rtw_ieee802_11_parse_elems(u8 *start, uint len, + struct rtw_ieee802_11_elems *elems, + int show_errors) +{ + uint left = len; + u8 *pos = start; + int unknown = 0; + + memset(elems, 0, sizeof(*elems)); + + while (left >= 2) { + u8 id, elen; + + id = *pos++; + elen = *pos++; + left -= 2; + + if (elen > left) { + if (show_errors) { + DBG_88E("IEEE 802.11 element parse failed (id=%d elen=%d left=%lu)\n", + id, elen, (unsigned long)left); + } + return ParseFailed; + } + + switch (id) { + case WLAN_EID_SSID: + elems->ssid = pos; + elems->ssid_len = elen; + break; + case WLAN_EID_SUPP_RATES: + elems->supp_rates = pos; + elems->supp_rates_len = elen; + break; + case WLAN_EID_FH_PARAMS: + elems->fh_params = pos; + elems->fh_params_len = elen; + break; + case WLAN_EID_DS_PARAMS: + elems->ds_params = pos; + elems->ds_params_len = elen; + break; + case WLAN_EID_CF_PARAMS: + elems->cf_params = pos; + elems->cf_params_len = elen; + break; + case WLAN_EID_TIM: + elems->tim = pos; + elems->tim_len = elen; + break; + case WLAN_EID_IBSS_PARAMS: + elems->ibss_params = pos; + elems->ibss_params_len = elen; + break; + case WLAN_EID_CHALLENGE: + elems->challenge = pos; + elems->challenge_len = elen; + break; + case WLAN_EID_ERP_INFO: + elems->erp_info = pos; + elems->erp_info_len = elen; + break; + case WLAN_EID_EXT_SUPP_RATES: + elems->ext_supp_rates = pos; + elems->ext_supp_rates_len = elen; + break; + case WLAN_EID_VENDOR_SPECIFIC: + if (rtw_ieee802_11_parse_vendor_specific(pos, elen, elems, show_errors)) + unknown++; + break; + case WLAN_EID_RSN: + elems->rsn_ie = pos; + elems->rsn_ie_len = elen; + break; + case WLAN_EID_PWR_CAPABILITY: + elems->power_cap = pos; + elems->power_cap_len = elen; + break; + case WLAN_EID_SUPPORTED_CHANNELS: + elems->supp_channels = pos; + elems->supp_channels_len = elen; + break; + case WLAN_EID_MOBILITY_DOMAIN: + elems->mdie = pos; + elems->mdie_len = elen; + break; + case WLAN_EID_FAST_BSS_TRANSITION: + elems->ftie = pos; + elems->ftie_len = elen; + break; + case WLAN_EID_TIMEOUT_INTERVAL: + elems->timeout_int = pos; + elems->timeout_int_len = elen; + break; + case WLAN_EID_HT_CAPABILITY: + elems->ht_capabilities = pos; + elems->ht_capabilities_len = elen; + break; + case WLAN_EID_HT_OPERATION: + elems->ht_operation = pos; + elems->ht_operation_len = elen; + break; + default: + unknown++; + if (!show_errors) + break; + DBG_88E("IEEE 802.11 element parse ignored unknown element (id=%d elen=%d)\n", + id, elen); + break; + } + left -= elen; + pos += elen; + } + if (left) + return ParseFailed; + return unknown ? ParseUnknown : ParseOK; +} + +void rtw_macaddr_cfg(u8 *mac_addr) +{ + u8 mac[ETH_ALEN]; + + if (!mac_addr) + return; + + if (rtw_initmac && mac_pton(rtw_initmac, mac)) { + /* Users specify the mac address */ + ether_addr_copy(mac_addr, mac); + } else { + /* Use the mac address stored in the Efuse */ + ether_addr_copy(mac, mac_addr); + } + + if (is_broadcast_ether_addr(mac) || is_zero_ether_addr(mac)) { + eth_random_addr(mac_addr); + DBG_88E("MAC Address from efuse error, assign random one !!!\n"); + } + + DBG_88E("%s MAC Address = %pM\n", __func__, mac_addr); +} + +static int rtw_get_cipher_info(struct wlan_network *pnetwork) +{ + uint wpa_ielen; + unsigned char *pbuf; + int group_cipher = 0, pairwise_cipher = 0, is8021x = 0; + int ret = _FAIL; + + pbuf = rtw_get_wpa_ie(&pnetwork->network.ies[12], &wpa_ielen, pnetwork->network.ie_length - 12); + + if (pbuf && (wpa_ielen > 0)) { + RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s: wpa_ielen: %d", __func__, wpa_ielen)); + if (_SUCCESS == rtw_parse_wpa_ie(pbuf, wpa_ielen + 2, &group_cipher, &pairwise_cipher, &is8021x)) { + pnetwork->BcnInfo.pairwise_cipher = pairwise_cipher; + pnetwork->BcnInfo.group_cipher = group_cipher; + pnetwork->BcnInfo.is_8021x = is8021x; + RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s: pnetwork->pairwise_cipher: %d, is_8021x is %d", + __func__, pnetwork->BcnInfo.pairwise_cipher, pnetwork->BcnInfo.is_8021x)); + ret = _SUCCESS; + } + } else { + pbuf = rtw_get_wpa2_ie(&pnetwork->network.ies[12], &wpa_ielen, pnetwork->network.ie_length - 12); + + if (pbuf && (wpa_ielen > 0)) { + RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("get RSN IE\n")); + if (_SUCCESS == rtw_parse_wpa2_ie(pbuf, wpa_ielen + 2, &group_cipher, &pairwise_cipher, &is8021x)) { + RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("get RSN IE OK!!!\n")); + pnetwork->BcnInfo.pairwise_cipher = pairwise_cipher; + pnetwork->BcnInfo.group_cipher = group_cipher; + pnetwork->BcnInfo.is_8021x = is8021x; + RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s: pnetwork->pairwise_cipher: %d," + "pnetwork->group_cipher is %d, is_8021x is %d", __func__, pnetwork->BcnInfo.pairwise_cipher, + pnetwork->BcnInfo.group_cipher, pnetwork->BcnInfo.is_8021x)); + ret = _SUCCESS; + } + } + } + + return ret; +} + +void rtw_get_bcn_info(struct wlan_network *pnetwork) +{ + unsigned short cap = 0; + u8 bencrypt = 0; + __le16 le_tmp; + u16 wpa_len = 0, rsn_len = 0; + struct HT_info_element *pht_info = NULL; + uint len; + unsigned char *p; + + memcpy(&le_tmp, rtw_get_capability_from_ie(pnetwork->network.ies), 2); + cap = le16_to_cpu(le_tmp); + if (cap & WLAN_CAPABILITY_PRIVACY) { + bencrypt = 1; + pnetwork->network.Privacy = 1; + } else { + pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_OPENSYS; + } + rtw_get_sec_ie(pnetwork->network.ies, pnetwork->network.ie_length, NULL, &rsn_len, NULL, &wpa_len); + RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s: ssid =%s\n", __func__, pnetwork->network.Ssid.Ssid)); + RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s: wpa_len =%d rsn_len =%d\n", __func__, wpa_len, rsn_len)); + RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s: ssid =%s\n", __func__, pnetwork->network.Ssid.Ssid)); + RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("%s: wpa_len =%d rsn_len =%d\n", __func__, wpa_len, rsn_len)); + + if (rsn_len > 0) { + pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WPA2; + } else if (wpa_len > 0) { + pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WPA; + } else { + if (bencrypt) + pnetwork->BcnInfo.encryp_protocol = ENCRYP_PROTOCOL_WEP; + } + RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("rtw_get_bcn_info: pnetwork->encryp_protocol is %x\n", + pnetwork->BcnInfo.encryp_protocol)); + RT_TRACE(_module_rtl871x_mlme_c_, _drv_info_, ("rtw_get_bcn_info: pnetwork->encryp_protocol is %x\n", + pnetwork->BcnInfo.encryp_protocol)); + rtw_get_cipher_info(pnetwork); + + /* get bwmode and ch_offset */ + /* parsing HT_CAP_IE */ + p = rtw_get_ie(pnetwork->network.ies + _FIXED_IE_LENGTH_, _HT_CAPABILITY_IE_, &len, pnetwork->network.ie_length - _FIXED_IE_LENGTH_); + if (p && len > 0) { + struct ieee80211_ht_cap *ht_cap = + (struct ieee80211_ht_cap *)(p + 2); + + pnetwork->BcnInfo.ht_cap_info = le16_to_cpu(ht_cap->cap_info); + } else { + pnetwork->BcnInfo.ht_cap_info = 0; + } + /* parsing HT_INFO_IE */ + p = rtw_get_ie(pnetwork->network.ies + _FIXED_IE_LENGTH_, _HT_ADD_INFO_IE_, &len, pnetwork->network.ie_length - _FIXED_IE_LENGTH_); + if (p && len > 0) { + pht_info = (struct HT_info_element *)(p + 2); + pnetwork->BcnInfo.ht_info_infos_0 = pht_info->infos[0]; + } else { + pnetwork->BcnInfo.ht_info_infos_0 = 0; + } +} + +/* show MCS rate, unit: 100Kbps */ +u16 rtw_mcs_rate(u8 rf_type, u8 bw_40MHz, u8 short_GI_20, u8 short_GI_40, unsigned char *MCS_rate) +{ + u16 max_rate = 0; + + if (rf_type == RF_1T1R) { + if (MCS_rate[0] & BIT(7)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 1500 : 1350) : ((short_GI_20) ? 722 : 650); + else if (MCS_rate[0] & BIT(6)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 1350 : 1215) : ((short_GI_20) ? 650 : 585); + else if (MCS_rate[0] & BIT(5)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 1200 : 1080) : ((short_GI_20) ? 578 : 520); + else if (MCS_rate[0] & BIT(4)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 900 : 810) : ((short_GI_20) ? 433 : 390); + else if (MCS_rate[0] & BIT(3)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 600 : 540) : ((short_GI_20) ? 289 : 260); + else if (MCS_rate[0] & BIT(2)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 450 : 405) : ((short_GI_20) ? 217 : 195); + else if (MCS_rate[0] & BIT(1)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 300 : 270) : ((short_GI_20) ? 144 : 130); + else if (MCS_rate[0] & BIT(0)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 150 : 135) : ((short_GI_20) ? 72 : 65); + } else { + if (MCS_rate[1]) { + if (MCS_rate[1] & BIT(7)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 3000 : 2700) : ((short_GI_20) ? 1444 : 1300); + else if (MCS_rate[1] & BIT(6)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 2700 : 2430) : ((short_GI_20) ? 1300 : 1170); + else if (MCS_rate[1] & BIT(5)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 2400 : 2160) : ((short_GI_20) ? 1156 : 1040); + else if (MCS_rate[1] & BIT(4)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 1800 : 1620) : ((short_GI_20) ? 867 : 780); + else if (MCS_rate[1] & BIT(3)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 1200 : 1080) : ((short_GI_20) ? 578 : 520); + else if (MCS_rate[1] & BIT(2)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 900 : 810) : ((short_GI_20) ? 433 : 390); + else if (MCS_rate[1] & BIT(1)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 600 : 540) : ((short_GI_20) ? 289 : 260); + else if (MCS_rate[1] & BIT(0)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 300 : 270) : ((short_GI_20) ? 144 : 130); + } else { + if (MCS_rate[0] & BIT(7)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 1500 : 1350) : ((short_GI_20) ? 722 : 650); + else if (MCS_rate[0] & BIT(6)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 1350 : 1215) : ((short_GI_20) ? 650 : 585); + else if (MCS_rate[0] & BIT(5)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 1200 : 1080) : ((short_GI_20) ? 578 : 520); + else if (MCS_rate[0] & BIT(4)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 900 : 810) : ((short_GI_20) ? 433 : 390); + else if (MCS_rate[0] & BIT(3)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 600 : 540) : ((short_GI_20) ? 289 : 260); + else if (MCS_rate[0] & BIT(2)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 450 : 405) : ((short_GI_20) ? 217 : 195); + else if (MCS_rate[0] & BIT(1)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 300 : 270) : ((short_GI_20) ? 144 : 130); + else if (MCS_rate[0] & BIT(0)) + max_rate = (bw_40MHz) ? ((short_GI_40) ? 150 : 135) : ((short_GI_20) ? 72 : 65); + } + } + return max_rate; +} |