| /****************************************************************************** |
| * 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. |
| * |
| * 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; |
| } |
| 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 *pregistrypriv) |
| { |
| int sz = 0, rateLen; |
| 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*/ |
| *(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->rates, pregistrypriv->wireless_mode); |
| rateLen = r8712_get_rateset_len(pdev_network->rates); |
| if (rateLen > 8) { |
| ie = r8712_set_ie(ie, _SUPPORTEDRATES_IE_, 8, |
| pdev_network->rates, &sz); |
| ie = r8712_set_ie(ie, _EXT_SUPPORTEDRATES_IE_, (rateLen - 8), |
| (pdev_network->rates + 8), &sz); |
| } else |
| ie = r8712_set_ie(ie, _SUPPORTEDRATES_IE_, |
| rateLen, pdev_network->rates, &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); |
| 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; |
| } |
| *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; |
| 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 _SUCCESS; |
| } |
| |
| 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 _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 _SUCCESS; |
| } |
| |
| 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; |
| } |