--- /dev/null
+/*
+ * hostapd / IEEE 802.11ac VHT
+ * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of BSD license
+ *
+ * See README and COPYING for more details.
+ */
+
+#include "utils/includes.h"
+
+#include "utils/common.h"
+#include "common/ieee802_11_defs.h"
+#include "hostapd.h"
+#include "ap_config.h"
+#include "sta_info.h"
+#include "beacon.h"
+#include "ieee802_11.h"
+#include "dfs.h"
+
+
+u8 * hostapd_eid_vht_capabilities(struct hostapd_data *hapd, u8 *eid, u32 nsts)
+{
+ struct ieee80211_vht_capabilities *cap;
+ struct hostapd_hw_modes *mode = hapd->iface->current_mode;
+ u8 *pos = eid;
+
+ if (!mode)
+ return eid;
+
+ if (mode->mode == HOSTAPD_MODE_IEEE80211G && hapd->conf->vendor_vht &&
+ mode->vht_capab == 0 && hapd->iface->hw_features) {
+ int i;
+
+ for (i = 0; i < hapd->iface->num_hw_features; i++) {
+ if (hapd->iface->hw_features[i].mode ==
+ HOSTAPD_MODE_IEEE80211A) {
+ mode = &hapd->iface->hw_features[i];
+ break;
+ }
+ }
+ }
+
+ *pos++ = WLAN_EID_VHT_CAP;
+ *pos++ = sizeof(*cap);
+
+ cap = (struct ieee80211_vht_capabilities *) pos;
+ os_memset(cap, 0, sizeof(*cap));
+ cap->vht_capabilities_info = host_to_le32(
+ hapd->iface->conf->vht_capab);
+
+ if (nsts != 0) {
+ u32 hapd_nsts;
+
+ hapd_nsts = le_to_host32(cap->vht_capabilities_info);
+ hapd_nsts = (hapd_nsts >> VHT_CAP_BEAMFORMEE_STS_OFFSET) & 7;
+ cap->vht_capabilities_info &=
+ ~(host_to_le32(hapd_nsts <<
+ VHT_CAP_BEAMFORMEE_STS_OFFSET));
+ cap->vht_capabilities_info |=
+ host_to_le32(nsts << VHT_CAP_BEAMFORMEE_STS_OFFSET);
+ }
+
+ /* Supported MCS set comes from hw */
+ os_memcpy(&cap->vht_supported_mcs_set, mode->vht_mcs_set, 8);
+
+ pos += sizeof(*cap);
+
+ return pos;
+}
+
+
+u8 * hostapd_eid_vht_operation(struct hostapd_data *hapd, u8 *eid)
+{
+ struct ieee80211_vht_operation *oper;
+ u8 *pos = eid;
+
+ *pos++ = WLAN_EID_VHT_OPERATION;
+ *pos++ = sizeof(*oper);
+
+ oper = (struct ieee80211_vht_operation *) pos;
+ os_memset(oper, 0, sizeof(*oper));
+
+ /*
+ * center freq = 5 GHz + (5 * index)
+ * So index 42 gives center freq 5.210 GHz
+ * which is channel 42 in 5G band
+ */
+ oper->vht_op_info_chan_center_freq_seg0_idx =
+ hapd->iconf->vht_oper_centr_freq_seg0_idx;
+ oper->vht_op_info_chan_center_freq_seg1_idx =
+ hapd->iconf->vht_oper_centr_freq_seg1_idx;
+
+ oper->vht_op_info_chwidth = hapd->iconf->vht_oper_chwidth;
+ if (hapd->iconf->vht_oper_chwidth == 2) {
+ /*
+ * Convert 160 MHz channel width to new style as interop
+ * workaround.
+ */
+ oper->vht_op_info_chwidth = 1;
+ oper->vht_op_info_chan_center_freq_seg1_idx =
+ oper->vht_op_info_chan_center_freq_seg0_idx;
+ if (hapd->iconf->channel <
+ hapd->iconf->vht_oper_centr_freq_seg0_idx)
+ oper->vht_op_info_chan_center_freq_seg0_idx -= 8;
+ else
+ oper->vht_op_info_chan_center_freq_seg0_idx += 8;
+ } else if (hapd->iconf->vht_oper_chwidth == 3) {
+ /*
+ * Convert 80+80 MHz channel width to new style as interop
+ * workaround.
+ */
+ oper->vht_op_info_chwidth = 1;
+ }
+
+ /* VHT Basic MCS set comes from hw */
+ /* Hard code 1 stream, MCS0-7 is a min Basic VHT MCS rates */
+ oper->vht_basic_mcs_set = host_to_le16(0xfffc);
+ pos += sizeof(*oper);
+
+ return pos;
+}
+
+
+static int check_valid_vht_mcs(struct hostapd_hw_modes *mode,
+ const u8 *sta_vht_capab)
+{
+ const struct ieee80211_vht_capabilities *vht_cap;
+ struct ieee80211_vht_capabilities ap_vht_cap;
+ u16 sta_rx_mcs_set, ap_tx_mcs_set;
+ int i;
+
+ if (!mode)
+ return 1;
+
+ /*
+ * Disable VHT caps for STAs for which there is not even a single
+ * allowed MCS in any supported number of streams, i.e., STA is
+ * advertising 3 (not supported) as VHT MCS rates for all supported
+ * stream cases.
+ */
+ os_memcpy(&ap_vht_cap.vht_supported_mcs_set, mode->vht_mcs_set,
+ sizeof(ap_vht_cap.vht_supported_mcs_set));
+ vht_cap = (const struct ieee80211_vht_capabilities *) sta_vht_capab;
+
+ /* AP Tx MCS map vs. STA Rx MCS map */
+ sta_rx_mcs_set = le_to_host16(vht_cap->vht_supported_mcs_set.rx_map);
+ ap_tx_mcs_set = le_to_host16(ap_vht_cap.vht_supported_mcs_set.tx_map);
+
+ for (i = 0; i < VHT_RX_NSS_MAX_STREAMS; i++) {
+ if ((ap_tx_mcs_set & (0x3 << (i * 2))) == 3)
+ continue;
+
+ if ((sta_rx_mcs_set & (0x3 << (i * 2))) == 3)
+ continue;
+
+ return 1;
+ }
+
+ wpa_printf(MSG_DEBUG,
+ "No matching VHT MCS found between AP TX and STA RX");
+ return 0;
+}
+
+
+u8 * hostapd_eid_wb_chsw_wrapper(struct hostapd_data *hapd, u8 *eid)
+{
+ u8 bw, chan1, chan2 = 0;
+ int freq1;
+
+ if (!hapd->cs_freq_params.channel ||
+ !hapd->cs_freq_params.vht_enabled)
+ return eid;
+
+ /* bandwidth: 0: 40, 1: 80, 2: 160, 3: 80+80 */
+ switch (hapd->cs_freq_params.bandwidth) {
+ case 40:
+ bw = 0;
+ break;
+ case 80:
+ /* check if it's 80+80 */
+ if (!hapd->cs_freq_params.center_freq2)
+ bw = 1;
+ else
+ bw = 3;
+ break;
+ case 160:
+ bw = 2;
+ break;
+ default:
+ /* not valid VHT bandwidth or not in CSA */
+ return eid;
+ }
+
+ freq1 = hapd->cs_freq_params.center_freq1 ?
+ hapd->cs_freq_params.center_freq1 :
+ hapd->cs_freq_params.freq;
+ if (ieee80211_freq_to_chan(freq1, &chan1) !=
+ HOSTAPD_MODE_IEEE80211A)
+ return eid;
+
+ if (hapd->cs_freq_params.center_freq2 &&
+ ieee80211_freq_to_chan(hapd->cs_freq_params.center_freq2,
+ &chan2) != HOSTAPD_MODE_IEEE80211A)
+ return eid;
+
+ *eid++ = WLAN_EID_VHT_CHANNEL_SWITCH_WRAPPER;
+ *eid++ = 5; /* Length of Channel Switch Wrapper */
+ *eid++ = WLAN_EID_VHT_WIDE_BW_CHSWITCH;
+ *eid++ = 3; /* Length of Wide Bandwidth Channel Switch element */
+ *eid++ = bw; /* New Channel Width */
+ *eid++ = chan1; /* New Channel Center Frequency Segment 0 */
+ *eid++ = chan2; /* New Channel Center Frequency Segment 1 */
+
+ return eid;
+}
+
+
+u8 * hostapd_eid_txpower_envelope(struct hostapd_data *hapd, u8 *eid)
+{
+ struct hostapd_iface *iface = hapd->iface;
+ struct hostapd_config *iconf = iface->conf;
+ struct hostapd_hw_modes *mode = iface->current_mode;
+ struct hostapd_channel_data *chan;
+ int dfs, i;
+ u8 channel, tx_pwr_count, local_pwr_constraint;
+ int max_tx_power;
+ u8 tx_pwr;
+
+ if (!mode)
+ return eid;
+
+ if (ieee80211_freq_to_chan(iface->freq, &channel) == NUM_HOSTAPD_MODES)
+ return eid;
+
+ for (i = 0; i < mode->num_channels; i++) {
+ if (mode->channels[i].freq == iface->freq)
+ break;
+ }
+ if (i == mode->num_channels)
+ return eid;
+
+ switch (iface->conf->vht_oper_chwidth) {
+ case VHT_CHANWIDTH_USE_HT:
+ if (iconf->secondary_channel == 0) {
+ /* Max Transmit Power count = 0 (20 MHz) */
+ tx_pwr_count = 0;
+ } else {
+ /* Max Transmit Power count = 1 (20, 40 MHz) */
+ tx_pwr_count = 1;
+ }
+ break;
+ case VHT_CHANWIDTH_80MHZ:
+ /* Max Transmit Power count = 2 (20, 40, and 80 MHz) */
+ tx_pwr_count = 2;
+ break;
+ case VHT_CHANWIDTH_80P80MHZ:
+ case VHT_CHANWIDTH_160MHZ:
+ /* Max Transmit Power count = 3 (20, 40, 80, 160/80+80 MHz) */
+ tx_pwr_count = 3;
+ break;
+ default:
+ return eid;
+ }
+
+ /*
+ * Below local_pwr_constraint logic is referred from
+ * hostapd_eid_pwr_constraint.
+ *
+ * Check if DFS is required by regulatory.
+ */
+ dfs = hostapd_is_dfs_required(hapd->iface);
+ if (dfs < 0)
+ dfs = 0;
+
+ /*
+ * In order to meet regulations when TPC is not implemented using
+ * a transmit power that is below the legal maximum (including any
+ * mitigation factor) should help. In this case, indicate 3 dB below
+ * maximum allowed transmit power.
+ */
+ if (hapd->iconf->local_pwr_constraint == -1)
+ local_pwr_constraint = (dfs == 0) ? 0 : 3;
+ else
+ local_pwr_constraint = hapd->iconf->local_pwr_constraint;
+
+ /*
+ * A STA that is not an AP shall use a transmit power less than or
+ * equal to the local maximum transmit power level for the channel.
+ * The local maximum transmit power can be calculated from the formula:
+ * local max TX pwr = max TX pwr - local pwr constraint
+ * Where max TX pwr is maximum transmit power level specified for
+ * channel in Country element and local pwr constraint is specified
+ * for channel in this Power Constraint element.
+ */
+ chan = &mode->channels[i];
+ max_tx_power = chan->max_tx_power - local_pwr_constraint;
+
+ /*
+ * Local Maximum Transmit power is encoded as two's complement
+ * with a 0.5 dB step.
+ */
+ max_tx_power *= 2; /* in 0.5 dB steps */
+ if (max_tx_power > 127) {
+ /* 63.5 has special meaning of 63.5 dBm or higher */
+ max_tx_power = 127;
+ }
+ if (max_tx_power < -128)
+ max_tx_power = -128;
+ if (max_tx_power < 0)
+ tx_pwr = 0x80 + max_tx_power + 128;
+ else
+ tx_pwr = max_tx_power;
+
+ *eid++ = WLAN_EID_VHT_TRANSMIT_POWER_ENVELOPE;
+ *eid++ = 2 + tx_pwr_count;
+
+ /*
+ * Max Transmit Power count and
+ * Max Transmit Power units = 0 (EIRP)
+ */
+ *eid++ = tx_pwr_count;
+
+ for (i = 0; i <= tx_pwr_count; i++)
+ *eid++ = tx_pwr;
+
+ return eid;
+}
+
+
+u16 copy_sta_vht_capab(struct hostapd_data *hapd, struct sta_info *sta,
+ const u8 *vht_capab)
+{
+ /* Disable VHT caps for STAs associated to no-VHT BSSes. */
+ if (!vht_capab ||
+ hapd->conf->disable_11ac ||
+ !check_valid_vht_mcs(hapd->iface->current_mode, vht_capab)) {
+ sta->flags &= ~WLAN_STA_VHT;
+ os_free(sta->vht_capabilities);
+ sta->vht_capabilities = NULL;
+ return WLAN_STATUS_SUCCESS;
+ }
+
+ if (sta->vht_capabilities == NULL) {
+ sta->vht_capabilities =
+ os_zalloc(sizeof(struct ieee80211_vht_capabilities));
+ if (sta->vht_capabilities == NULL)
+ return WLAN_STATUS_UNSPECIFIED_FAILURE;
+ }
+
+ sta->flags |= WLAN_STA_VHT;
+ os_memcpy(sta->vht_capabilities, vht_capab,
+ sizeof(struct ieee80211_vht_capabilities));
+
+ return WLAN_STATUS_SUCCESS;
+}
+
+
+u16 copy_sta_vendor_vht(struct hostapd_data *hapd, struct sta_info *sta,
+ const u8 *ie, size_t len)
+{
+ const u8 *vht_capab;
+ unsigned int vht_capab_len;
+
+ if (!ie || len < 5 + 2 + sizeof(struct ieee80211_vht_capabilities) ||
+ hapd->conf->disable_11ac)
+ goto no_capab;
+
+ /* The VHT Capabilities element embedded in vendor VHT */
+ vht_capab = ie + 5;
+ if (vht_capab[0] != WLAN_EID_VHT_CAP)
+ goto no_capab;
+ vht_capab_len = vht_capab[1];
+ if (vht_capab_len < sizeof(struct ieee80211_vht_capabilities) ||
+ (int) vht_capab_len > ie + len - vht_capab - 2)
+ goto no_capab;
+ vht_capab += 2;
+
+ if (sta->vht_capabilities == NULL) {
+ sta->vht_capabilities =
+ os_zalloc(sizeof(struct ieee80211_vht_capabilities));
+ if (sta->vht_capabilities == NULL)
+ return WLAN_STATUS_UNSPECIFIED_FAILURE;
+ }
+
+ sta->flags |= WLAN_STA_VHT | WLAN_STA_VENDOR_VHT;
+ os_memcpy(sta->vht_capabilities, vht_capab,
+ sizeof(struct ieee80211_vht_capabilities));
+ return WLAN_STATUS_SUCCESS;
+
+no_capab:
+ sta->flags &= ~WLAN_STA_VENDOR_VHT;
+ return WLAN_STATUS_SUCCESS;
+}
+
+
+u8 * hostapd_eid_vendor_vht(struct hostapd_data *hapd, u8 *eid)
+{
+ u8 *pos = eid;
+
+ if (!hapd->iface->current_mode)
+ return eid;
+
+ *pos++ = WLAN_EID_VENDOR_SPECIFIC;
+ *pos++ = (5 + /* The Vendor OUI, type and subtype */
+ 2 + sizeof(struct ieee80211_vht_capabilities) +
+ 2 + sizeof(struct ieee80211_vht_operation));
+
+ WPA_PUT_BE32(pos, (OUI_BROADCOM << 8) | VENDOR_VHT_TYPE);
+ pos += 4;
+ *pos++ = VENDOR_VHT_SUBTYPE;
+ pos = hostapd_eid_vht_capabilities(hapd, pos, 0);
+ pos = hostapd_eid_vht_operation(hapd, pos);
+
+ return pos;
+}
+
+
+u16 set_sta_vht_opmode(struct hostapd_data *hapd, struct sta_info *sta,
+ const u8 *vht_oper_notif)
+{
+ if (!vht_oper_notif) {
+ sta->flags &= ~WLAN_STA_VHT_OPMODE_ENABLED;
+ return WLAN_STATUS_SUCCESS;
+ }
+
+ sta->flags |= WLAN_STA_VHT_OPMODE_ENABLED;
+ sta->vht_opmode = *vht_oper_notif;
+ return WLAN_STATUS_SUCCESS;
+}
+
+
+void hostapd_get_vht_capab(struct hostapd_data *hapd,
+ struct ieee80211_vht_capabilities *vht_cap,
+ struct ieee80211_vht_capabilities *neg_vht_cap)
+{
+ u32 cap, own_cap, sym_caps;
+
+ if (vht_cap == NULL)
+ return;
+ os_memcpy(neg_vht_cap, vht_cap, sizeof(*neg_vht_cap));
+
+ cap = le_to_host32(neg_vht_cap->vht_capabilities_info);
+ own_cap = hapd->iconf->vht_capab;
+
+ /* mask out symmetric VHT capabilities we don't support */
+ sym_caps = VHT_CAP_SHORT_GI_80 | VHT_CAP_SHORT_GI_160;
+ cap &= ~sym_caps | (own_cap & sym_caps);
+
+ /* mask out beamformer/beamformee caps if not supported */
+ if (!(own_cap & VHT_CAP_SU_BEAMFORMER_CAPABLE))
+ cap &= ~(VHT_CAP_SU_BEAMFORMEE_CAPABLE |
+ VHT_CAP_BEAMFORMEE_STS_MAX);
+
+ if (!(own_cap & VHT_CAP_SU_BEAMFORMEE_CAPABLE))
+ cap &= ~(VHT_CAP_SU_BEAMFORMER_CAPABLE |
+ VHT_CAP_SOUNDING_DIMENSION_MAX);
+
+ if (!(own_cap & VHT_CAP_MU_BEAMFORMER_CAPABLE))
+ cap &= ~VHT_CAP_MU_BEAMFORMEE_CAPABLE;
+
+ if (!(own_cap & VHT_CAP_MU_BEAMFORMEE_CAPABLE))
+ cap &= ~VHT_CAP_MU_BEAMFORMER_CAPABLE;
+
+ /* mask channel widths we don't support */
+ switch (own_cap & VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
+ case VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
+ break;
+ case VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
+ if (cap & VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) {
+ cap &= ~VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
+ cap |= VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
+ }
+ break;
+ default:
+ cap &= ~VHT_CAP_SUPP_CHAN_WIDTH_MASK;
+ break;
+ }
+
+ if (!(cap & VHT_CAP_SUPP_CHAN_WIDTH_MASK))
+ cap &= ~VHT_CAP_SHORT_GI_160;
+
+ /*
+ * if we don't support RX STBC, mask out TX STBC in the STA's HT caps
+ * if we don't support TX STBC, mask out RX STBC in the STA's HT caps
+ */
+ if (!(own_cap & VHT_CAP_RXSTBC_MASK))
+ cap &= ~VHT_CAP_TXSTBC;
+ if (!(own_cap & VHT_CAP_TXSTBC))
+ cap &= ~VHT_CAP_RXSTBC_MASK;
+
+ neg_vht_cap->vht_capabilities_info = host_to_le32(cap);
+}
projects / mech_eap.git / blobdiff