WNM: Add WNM-Sleep Mode for station mode
Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Xi Chen
Jouni Malinen
parent
d32d94dbf4
commit
75cad1a0d4
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@ -2659,3 +2659,120 @@ void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx)
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pmksa_cache_flush(sm->pmksa, network_ctx);
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#endif /* CONFIG_NO_WPA2 */
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}
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#ifdef CONFIG_IEEE80211V
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int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf)
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{
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struct wpa_gtk_data gd;
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#ifdef CONFIG_IEEE80211W
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struct wpa_igtk_kde igd;
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u16 keyidx;
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#endif /* CONFIG_IEEE80211W */
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u16 keyinfo;
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u8 keylen; /* plaintext key len */
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u8 keydatalen;
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u8 *key_rsc;
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os_memset(&gd, 0, sizeof(gd));
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#ifdef CONFIG_IEEE80211W
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os_memset(&igd, 0, sizeof(igd));
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#endif /* CONFIG_IEEE80211W */
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switch (sm->group_cipher) {
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case WPA_CIPHER_CCMP:
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keylen = 16;
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gd.key_rsc_len = 6;
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gd.alg = WPA_ALG_CCMP;
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break;
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case WPA_CIPHER_TKIP:
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keylen = 32;
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gd.key_rsc_len = 6;
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gd.alg = WPA_ALG_TKIP;
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break;
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case WPA_CIPHER_WEP104:
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keylen = 13;
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gd.key_rsc_len = 0;
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gd.alg = WPA_ALG_WEP;
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break;
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case WPA_CIPHER_WEP40:
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keylen = 5;
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gd.key_rsc_len = 0;
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gd.alg = WPA_ALG_WEP;
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break;
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default:
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wpa_printf(MSG_DEBUG, "Unsupported group cipher suite");
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return -1;
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}
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if (subelem_id == WNM_SLEEP_SUBELEM_GTK) {
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key_rsc = buf + 5;
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keyinfo = WPA_GET_LE16(buf+2);
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keydatalen = buf[1] - 11 - 8;
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gd.gtk_len = keylen;
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if (gd.gtk_len != buf[4]) {
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wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d",
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gd.gtk_len, buf[4]);
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return -1;
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}
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gd.keyidx = keyinfo & 0x03; /* B0 - B1 */
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gd.tx = wpa_supplicant_gtk_tx_bit_workaround(
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sm, !!(keyinfo & WPA_KEY_INFO_TXRX));
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if (keydatalen % 8) {
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wpa_printf(MSG_DEBUG, "WPA: Unsupported AES-WRAP len "
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"%d", keydatalen);
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return -1;
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}
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if (aes_unwrap(sm->ptk.kek, keydatalen / 8, buf + 13, gd.gtk))
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{
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wpa_printf(MSG_WARNING, "WNM: AES unwrap failed - "
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"could not decrypt GTK");
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return -1;
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}
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wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)",
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gd.gtk, gd.gtk_len);
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if (wpa_supplicant_install_gtk(sm, &gd, key_rsc)) {
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wpa_printf(MSG_DEBUG, "Failed to install the GTK in "
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"WNM mode");
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return -1;
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}
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#ifdef CONFIG_IEEE80211W
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} else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) {
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if (buf[1] != 2 + 6 + WPA_IGTK_LEN + 8) {
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wpa_printf(MSG_DEBUG, "WPA: Unsupported AES-WRAP len "
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"%d", buf[1] - 2 - 6 - 8);
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return -1;
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}
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os_memcpy(igd.keyid, buf + 2, 2);
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os_memcpy(igd.pn, buf + 4, 6);
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keyidx = WPA_GET_LE16(igd.keyid);
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if (aes_unwrap(sm->ptk.kek, WPA_IGTK_LEN / 8, buf + 10,
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igd.igtk)) {
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wpa_printf(MSG_WARNING, "WNM: AES unwrap failed - "
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"could not decrypr IGTK");
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return -1;
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}
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wpa_hexdump_key(MSG_DEBUG, "Install IGTK (WNM SLEEP)",
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igd.igtk, WPA_IGTK_LEN);
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if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr,
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keyidx, 0, igd.pn, sizeof(igd.pn),
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igd.igtk, WPA_IGTK_LEN) < 0) {
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wpa_printf(MSG_DEBUG, "Failed to install the IGTK in "
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"WNM mode");
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return -1;
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}
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#endif /* CONFIG_IEEE80211W */
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} else {
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wpa_printf(MSG_DEBUG, "Unknown element id");
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return -1;
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}
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return 0;
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}
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#endif /* CONFIG_IEEE80211V */
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@ -366,4 +366,8 @@ void wpa_tdls_enable(struct wpa_sm *sm, int enabled);
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void wpa_tdls_disable_link(struct wpa_sm *sm, const u8 *addr);
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int wpa_tdls_is_external_setup(struct wpa_sm *sm);
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#ifdef CONFIG_IEEE80211V
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int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf);
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#endif /* CONFIG_IEEE80211V */
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#endif /* WPA_H */
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@ -167,6 +167,11 @@ NEED_SHA256=y
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NEED_AES_OMAC1=y
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endif
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ifdef CONFIG_IEEE80211V
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CFLAGS += -DCONFIG_IEEE80211V
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OBJS += wnm_sta.o
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endif
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ifdef CONFIG_TDLS
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CFLAGS += -DCONFIG_TDLS
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OBJS += ../src/rsn_supp/tdls.o
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@ -23,6 +23,7 @@
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#include "eap_peer/eap.h"
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#include "ap/hostapd.h"
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#include "p2p/p2p.h"
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#include "wnm_sta.h"
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#include "notify.h"
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#include "common/ieee802_11_defs.h"
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#include "common/ieee802_11_common.h"
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@ -1990,6 +1991,25 @@ static void wpa_supplicant_event_tdls(struct wpa_supplicant *wpa_s,
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#endif /* CONFIG_TDLS */
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#ifdef CONFIG_IEEE80211V
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static void wpa_supplicant_event_wnm(struct wpa_supplicant *wpa_s,
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union wpa_event_data *data)
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{
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if (data == NULL)
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return;
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switch (data->wnm.oper) {
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case WNM_OPER_SLEEP:
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wpa_printf(MSG_DEBUG, "Start sending WNM-Sleep Request "
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"(action=%d, intval=%d)",
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data->wnm.sleep_action, data->wnm.sleep_intval);
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ieee802_11_send_wnmsleep_req(wpa_s, data->wnm.sleep_action,
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data->wnm.sleep_intval);
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break;
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}
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}
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#endif /* CONFIG_IEEE80211V */
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#ifdef CONFIG_IEEE80211R
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static void
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wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
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@ -2313,6 +2333,11 @@ void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
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wpa_supplicant_event_tdls(wpa_s, data);
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break;
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#endif /* CONFIG_TDLS */
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#ifdef CONFIG_IEEE80211V
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case EVENT_WNM:
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wpa_supplicant_event_wnm(wpa_s, data);
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break;
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#endif /* CONFIG_IEEE80211V */
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#ifdef CONFIG_IEEE80211R
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case EVENT_FT_RESPONSE:
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wpa_supplicant_event_ft_response(wpa_s, data);
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@ -2503,6 +2528,12 @@ void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
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}
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#endif /* CONFIG_SME */
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#endif /* CONFIG_IEEE80211W */
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#ifdef CONFIG_IEEE80211V
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if (data->rx_action.category == WLAN_ACTION_WNM) {
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ieee802_11_rx_wnm_action(wpa_s, &data->rx_action);
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break;
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}
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#endif /* CONFIG_IEEE80211V */
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#ifdef CONFIG_GAS
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if (data->rx_action.category == WLAN_ACTION_PUBLIC &&
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gas_query_rx(wpa_s->gas, data->rx_action.da,
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@ -0,0 +1,248 @@
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/*
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* wpa_supplicant - WNM
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* Copyright (c) 2011-2012, Qualcomm Atheros, Inc.
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#include "utils/includes.h"
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#include "utils/common.h"
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#include "common/ieee802_11_defs.h"
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#include "rsn_supp/wpa.h"
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#include "../wpa_supplicant/wpa_supplicant_i.h"
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#include "../wpa_supplicant/driver_i.h"
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#define MAX_TFS_IE_LEN 1024
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#ifdef CONFIG_IEEE80211V
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/* get the TFS IE from driver */
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static int ieee80211_11_get_tfs_ie(struct wpa_supplicant *wpa_s, u8 *buf,
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u16 *buf_len, enum wnm_oper oper)
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{
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wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
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return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len);
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}
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/* set the TFS IE to driver */
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static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
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const u8 *addr, u8 *buf, u16 *buf_len,
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enum wnm_oper oper)
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{
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wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
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return wpa_drv_wnm_oper(wpa_s, oper, addr, buf, buf_len);
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}
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/* MLME-SLEEPMODE.request */
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int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
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u8 action, u8 intval)
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{
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struct ieee80211_mgmt *mgmt;
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int res;
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size_t len;
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struct wnm_sleep_element *wnmsleep_ie;
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u8 *wnmtfs_ie;
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u8 wnmsleep_ie_len;
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u16 wnmtfs_ie_len; /* possibly multiple IE(s) */
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enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
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WNM_SLEEP_TFS_REQ_IE_NONE;
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/* WNM-Sleep Mode IE */
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wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
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wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
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if (wnmsleep_ie == NULL)
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return -1;
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wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
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wnmsleep_ie->len = wnmsleep_ie_len - 2;
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wnmsleep_ie->action_type = action;
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wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
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wnmsleep_ie->intval = intval;
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/* TFS IE(s) */
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wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
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if (wnmtfs_ie == NULL) {
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os_free(wnmsleep_ie);
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return -1;
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}
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if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
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tfs_oper)) {
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wnmtfs_ie_len = 0;
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os_free(wnmtfs_ie);
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wnmtfs_ie = NULL;
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}
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mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len);
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if (mgmt == NULL) {
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wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
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"WNM-Sleep Request action frame");
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return -1;
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}
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os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
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os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
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os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
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mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
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WLAN_FC_STYPE_ACTION);
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mgmt->u.action.category = WLAN_ACTION_WNM;
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mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
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os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
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wnmsleep_ie_len);
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/* copy TFS IE here */
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if (wnmtfs_ie_len > 0) {
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os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
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wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
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}
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len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
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wnmtfs_ie_len;
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res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
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wpa_s->own_addr, wpa_s->bssid,
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&mgmt->u.action.category, len, 0);
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if (res < 0)
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wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
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"(action=%d, intval=%d)", action, intval);
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os_free(wnmsleep_ie);
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os_free(wnmtfs_ie);
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os_free(mgmt);
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return res;
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}
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static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
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const u8 *frm, int len)
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{
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/*
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* Action [1] | Diaglog Token [1] | Key Data Len [2] | Key Data |
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* WNM-Sleep Mode IE | TFS Response IE
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*/
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u8 *pos = (u8 *) frm; /* point to action field */
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u16 key_len_total = le_to_host16(*((u16 *)(frm+2)));
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u8 gtk_len;
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#ifdef CONFIG_IEEE80211W
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u8 igtk_len;
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#endif /* CONFIG_IEEE80211W */
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struct wnm_sleep_element *wnmsleep_ie = NULL;
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/* multiple TFS Resp IE (assuming consecutive) */
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u8 *tfsresp_ie_start = NULL;
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u8 *tfsresp_ie_end = NULL;
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u16 tfsresp_ie_len = 0;
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wpa_printf(MSG_DEBUG, "action=%d token = %d key_len_total = %d",
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frm[0], frm[1], key_len_total);
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pos += 4 + key_len_total;
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while (pos - frm < len) {
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u8 ie_len = *(pos + 1);
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if (*pos == WLAN_EID_WNMSLEEP)
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wnmsleep_ie = (struct wnm_sleep_element *) pos;
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else if (*pos == WLAN_EID_TFS_RESP) {
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if (!tfsresp_ie_start)
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tfsresp_ie_start = pos;
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tfsresp_ie_end = pos;
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} else
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wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
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pos += ie_len + 2;
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}
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if (!wnmsleep_ie) {
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wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
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return;
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}
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if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT) {
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wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
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"frame (action=%d, intval=%d)",
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wnmsleep_ie->action_type, wnmsleep_ie->intval);
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if (wnmsleep_ie->action_type == 0) {
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wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
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wpa_s->bssid, NULL, NULL);
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/* remove GTK/IGTK ?? */
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/* set the TFS Resp IE(s) */
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if (tfsresp_ie_start && tfsresp_ie_end &&
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tfsresp_ie_end - tfsresp_ie_start >= 0) {
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tfsresp_ie_len = (tfsresp_ie_end +
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tfsresp_ie_end[1] + 2) -
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tfsresp_ie_start;
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wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
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/*
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* pass the TFS Resp IE(s) to driver for
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* processing
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*/
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if (ieee80211_11_set_tfs_ie(
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wpa_s, wpa_s->bssid,
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tfsresp_ie_start,
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&tfsresp_ie_len,
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WNM_SLEEP_TFS_RESP_IE_SET))
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wpa_printf(MSG_DEBUG, "Fail to set "
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"TFS Resp IE");
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}
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} else if (wnmsleep_ie->action_type == 1) {
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wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM,
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wpa_s->bssid, NULL, NULL);
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/* Install GTK/IGTK */
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do {
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/* point to key data field */
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u8 *ptr = (u8 *) frm + 1 + 1 + 2;
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while (ptr < (u8 *) frm + 4 + key_len_total) {
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if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
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gtk_len = *(ptr + 4);
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wpa_wnmsleep_install_key(
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wpa_s->wpa,
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WNM_SLEEP_SUBELEM_GTK,
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ptr);
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ptr += 13 + gtk_len;
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#ifdef CONFIG_IEEE80211W
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} else if (*ptr ==
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WNM_SLEEP_SUBELEM_IGTK) {
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igtk_len = WPA_IGTK_LEN;
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wpa_wnmsleep_install_key(
|
||||
wpa_s->wpa,
|
||||
WNM_SLEEP_SUBELEM_IGTK,
|
||||
ptr);
|
||||
ptr += 10 + WPA_IGTK_LEN;
|
||||
#endif /* CONFIG_IEEE80211W */
|
||||
} else
|
||||
break; /* skip the loop */
|
||||
}
|
||||
} while(0);
|
||||
}
|
||||
} else {
|
||||
wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
|
||||
"(action=%d, intval=%d)",
|
||||
wnmsleep_ie->action_type, wnmsleep_ie->intval);
|
||||
if (wnmsleep_ie->action_type == 0)
|
||||
wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
|
||||
wpa_s->bssid, NULL, NULL);
|
||||
else if (wnmsleep_ie->action_type == 1)
|
||||
wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
|
||||
wpa_s->bssid, NULL, NULL);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
|
||||
struct rx_action *action)
|
||||
{
|
||||
u8 *pos = (u8 *) action->data; /* point to action field */
|
||||
u8 act = *pos++;
|
||||
/* u8 dialog_token = *pos++; */
|
||||
|
||||
switch (act) {
|
||||
case WNM_SLEEP_MODE_RESP:
|
||||
ieee802_11_rx_wnmsleep_resp(wpa_s, action->data, action->len);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
#endif /* CONFIG_IEEE80211V */
|
||||
|
|
@ -0,0 +1,21 @@
|
|||
/*
|
||||
* IEEE 802.11v WNM related functions and structures
|
||||
* Copyright (c) 2011-2012, Qualcomm Atheros, Inc.
|
||||
*
|
||||
* This software may be distributed under the terms of the BSD license.
|
||||
* See README for more details.
|
||||
*/
|
||||
|
||||
#ifndef WNM_STA_H
|
||||
#define WNM_STA_H
|
||||
|
||||
struct rx_action;
|
||||
struct wpa_supplicant;
|
||||
|
||||
int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
|
||||
u8 action, u8 intval);
|
||||
|
||||
void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
|
||||
struct rx_action *action);
|
||||
|
||||
#endif /* WNM_STA_H */
|
||||
Loading…
Reference in New Issue