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WNM: Add WNM-Sleep Mode for station mode

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Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Xi Chen 2012-02-26 17:27:19 +02:00 committed by Jouni Malinen
parent d32d94dbf4
commit 75cad1a0d4
6 changed files with 426 additions and 0 deletions
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117
src/rsn_supp/wpa.c
View file

@ -2659,3 +2659,120 @@ void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx)
pmksa_cache_flush(sm->pmksa, network_ctx);
#endif /* CONFIG_NO_WPA2 */
}
#ifdef CONFIG_IEEE80211V
int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf)
{
struct wpa_gtk_data gd;
#ifdef CONFIG_IEEE80211W
struct wpa_igtk_kde igd;
u16 keyidx;
#endif /* CONFIG_IEEE80211W */
u16 keyinfo;
u8 keylen; /* plaintext key len */
u8 keydatalen;
u8 *key_rsc;
os_memset(&gd, 0, sizeof(gd));
#ifdef CONFIG_IEEE80211W
os_memset(&igd, 0, sizeof(igd));
#endif /* CONFIG_IEEE80211W */
switch (sm->group_cipher) {
case WPA_CIPHER_CCMP:
keylen = 16;
gd.key_rsc_len = 6;
gd.alg = WPA_ALG_CCMP;
break;
case WPA_CIPHER_TKIP:
keylen = 32;
gd.key_rsc_len = 6;
gd.alg = WPA_ALG_TKIP;
break;
case WPA_CIPHER_WEP104:
keylen = 13;
gd.key_rsc_len = 0;
gd.alg = WPA_ALG_WEP;
break;
case WPA_CIPHER_WEP40:
keylen = 5;
gd.key_rsc_len = 0;
gd.alg = WPA_ALG_WEP;
break;
default:
wpa_printf(MSG_DEBUG, "Unsupported group cipher suite");
return -1;
}
if (subelem_id == WNM_SLEEP_SUBELEM_GTK) {
key_rsc = buf + 5;
keyinfo = WPA_GET_LE16(buf+2);
keydatalen = buf[1] - 11 - 8;
gd.gtk_len = keylen;
if (gd.gtk_len != buf[4]) {
wpa_printf(MSG_DEBUG, "GTK len mismatch len %d vs %d",
gd.gtk_len, buf[4]);
return -1;
}
gd.keyidx = keyinfo & 0x03; /* B0 - B1 */
gd.tx = wpa_supplicant_gtk_tx_bit_workaround(
sm, !!(keyinfo & WPA_KEY_INFO_TXRX));
if (keydatalen % 8) {
wpa_printf(MSG_DEBUG, "WPA: Unsupported AES-WRAP len "
"%d", keydatalen);
return -1;
}
if (aes_unwrap(sm->ptk.kek, keydatalen / 8, buf + 13, gd.gtk))
{
wpa_printf(MSG_WARNING, "WNM: AES unwrap failed - "
"could not decrypt GTK");
return -1;
}
wpa_hexdump_key(MSG_DEBUG, "Install GTK (WNM SLEEP)",
gd.gtk, gd.gtk_len);
if (wpa_supplicant_install_gtk(sm, &gd, key_rsc)) {
wpa_printf(MSG_DEBUG, "Failed to install the GTK in "
"WNM mode");
return -1;
}
#ifdef CONFIG_IEEE80211W
} else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) {
if (buf[1] != 2 + 6 + WPA_IGTK_LEN + 8) {
wpa_printf(MSG_DEBUG, "WPA: Unsupported AES-WRAP len "
"%d", buf[1] - 2 - 6 - 8);
return -1;
}
os_memcpy(igd.keyid, buf + 2, 2);
os_memcpy(igd.pn, buf + 4, 6);
keyidx = WPA_GET_LE16(igd.keyid);
if (aes_unwrap(sm->ptk.kek, WPA_IGTK_LEN / 8, buf + 10,
igd.igtk)) {
wpa_printf(MSG_WARNING, "WNM: AES unwrap failed - "
"could not decrypr IGTK");
return -1;
}
wpa_hexdump_key(MSG_DEBUG, "Install IGTK (WNM SLEEP)",
igd.igtk, WPA_IGTK_LEN);
if (wpa_sm_set_key(sm, WPA_ALG_IGTK, broadcast_ether_addr,
keyidx, 0, igd.pn, sizeof(igd.pn),
igd.igtk, WPA_IGTK_LEN) < 0) {
wpa_printf(MSG_DEBUG, "Failed to install the IGTK in "
"WNM mode");
return -1;
}
#endif /* CONFIG_IEEE80211W */
} else {
wpa_printf(MSG_DEBUG, "Unknown element id");
return -1;
}
return 0;
}
#endif /* CONFIG_IEEE80211V */

4
src/rsn_supp/wpa.h
View file

@ -366,4 +366,8 @@ void wpa_tdls_enable(struct wpa_sm *sm, int enabled);
void wpa_tdls_disable_link(struct wpa_sm *sm, const u8 *addr);
int wpa_tdls_is_external_setup(struct wpa_sm *sm);
#ifdef CONFIG_IEEE80211V
int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf);
#endif /* CONFIG_IEEE80211V */
#endif /* WPA_H */

5
wpa_supplicant/Makefile
View file

@ -167,6 +167,11 @@ NEED_SHA256=y
NEED_AES_OMAC1=y
endif
ifdef CONFIG_IEEE80211V
CFLAGS += -DCONFIG_IEEE80211V
OBJS += wnm_sta.o
endif
ifdef CONFIG_TDLS
CFLAGS += -DCONFIG_TDLS
OBJS += ../src/rsn_supp/tdls.o

31
wpa_supplicant/events.c
View file

@ -23,6 +23,7 @@
#include "eap_peer/eap.h"
#include "ap/hostapd.h"
#include "p2p/p2p.h"
#include "wnm_sta.h"
#include "notify.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
@ -1990,6 +1991,25 @@ static void wpa_supplicant_event_tdls(struct wpa_supplicant *wpa_s,
#endif /* CONFIG_TDLS */
#ifdef CONFIG_IEEE80211V
static void wpa_supplicant_event_wnm(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
if (data == NULL)
return;
switch (data->wnm.oper) {
case WNM_OPER_SLEEP:
wpa_printf(MSG_DEBUG, "Start sending WNM-Sleep Request "
"(action=%d, intval=%d)",
data->wnm.sleep_action, data->wnm.sleep_intval);
ieee802_11_send_wnmsleep_req(wpa_s, data->wnm.sleep_action,
data->wnm.sleep_intval);
break;
}
}
#endif /* CONFIG_IEEE80211V */
#ifdef CONFIG_IEEE80211R
static void
wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
@ -2313,6 +2333,11 @@ void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
wpa_supplicant_event_tdls(wpa_s, data);
break;
#endif /* CONFIG_TDLS */
#ifdef CONFIG_IEEE80211V
case EVENT_WNM:
wpa_supplicant_event_wnm(wpa_s, data);
break;
#endif /* CONFIG_IEEE80211V */
#ifdef CONFIG_IEEE80211R
case EVENT_FT_RESPONSE:
wpa_supplicant_event_ft_response(wpa_s, data);
@ -2503,6 +2528,12 @@ void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
}
#endif /* CONFIG_SME */
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_IEEE80211V
if (data->rx_action.category == WLAN_ACTION_WNM) {
ieee802_11_rx_wnm_action(wpa_s, &data->rx_action);
break;
}
#endif /* CONFIG_IEEE80211V */
#ifdef CONFIG_GAS
if (data->rx_action.category == WLAN_ACTION_PUBLIC &&
gas_query_rx(wpa_s->gas, data->rx_action.da,

248
wpa_supplicant/wnm_sta.c Normal file
View file

@ -0,0 +1,248 @@
/*
* wpa_supplicant - WNM
* Copyright (c) 2011-2012, Qualcomm Atheros, Inc.
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "utils/includes.h"
#include "utils/common.h"
#include "common/ieee802_11_defs.h"
#include "rsn_supp/wpa.h"
#include "../wpa_supplicant/wpa_supplicant_i.h"
#include "../wpa_supplicant/driver_i.h"
#define MAX_TFS_IE_LEN 1024
#ifdef CONFIG_IEEE80211V
/* get the TFS IE from driver */
static int ieee80211_11_get_tfs_ie(struct wpa_supplicant *wpa_s, u8 *buf,
u16 *buf_len, enum wnm_oper oper)
{
wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len);
}
/* set the TFS IE to driver */
static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
const u8 *addr, u8 *buf, u16 *buf_len,
enum wnm_oper oper)
{
wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
return wpa_drv_wnm_oper(wpa_s, oper, addr, buf, buf_len);
}
/* MLME-SLEEPMODE.request */
int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
u8 action, u8 intval)
{
struct ieee80211_mgmt *mgmt;
int res;
size_t len;
struct wnm_sleep_element *wnmsleep_ie;
u8 *wnmtfs_ie;
u8 wnmsleep_ie_len;
u16 wnmtfs_ie_len; /* possibly multiple IE(s) */
enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
WNM_SLEEP_TFS_REQ_IE_NONE;
/* WNM-Sleep Mode IE */
wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
if (wnmsleep_ie == NULL)
return -1;
wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
wnmsleep_ie->len = wnmsleep_ie_len - 2;
wnmsleep_ie->action_type = action;
wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
wnmsleep_ie->intval = intval;
/* TFS IE(s) */
wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
if (wnmtfs_ie == NULL) {
os_free(wnmsleep_ie);
return -1;
}
if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
tfs_oper)) {
wnmtfs_ie_len = 0;
os_free(wnmtfs_ie);
wnmtfs_ie = NULL;
}
mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len);
if (mgmt == NULL) {
wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
"WNM-Sleep Request action frame");
return -1;
}
os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_ACTION);
mgmt->u.action.category = WLAN_ACTION_WNM;
mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
wnmsleep_ie_len);
/* copy TFS IE here */
if (wnmtfs_ie_len > 0) {
os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
}
len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
wnmtfs_ie_len;
res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
wpa_s->own_addr, wpa_s->bssid,
&mgmt->u.action.category, len, 0);
if (res < 0)
wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
"(action=%d, intval=%d)", action, intval);
os_free(wnmsleep_ie);
os_free(wnmtfs_ie);
os_free(mgmt);
return res;
}
static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
const u8 *frm, int len)
{
/*
* Action [1] | Diaglog Token [1] | Key Data Len [2] | Key Data |
* WNM-Sleep Mode IE | TFS Response IE
*/
u8 *pos = (u8 *) frm; /* point to action field */
u16 key_len_total = le_to_host16(*((u16 *)(frm+2)));
u8 gtk_len;
#ifdef CONFIG_IEEE80211W
u8 igtk_len;
#endif /* CONFIG_IEEE80211W */
struct wnm_sleep_element *wnmsleep_ie = NULL;
/* multiple TFS Resp IE (assuming consecutive) */
u8 *tfsresp_ie_start = NULL;
u8 *tfsresp_ie_end = NULL;
u16 tfsresp_ie_len = 0;
wpa_printf(MSG_DEBUG, "action=%d token = %d key_len_total = %d",
frm[0], frm[1], key_len_total);
pos += 4 + key_len_total;
while (pos - frm < len) {
u8 ie_len = *(pos + 1);
if (*pos == WLAN_EID_WNMSLEEP)
wnmsleep_ie = (struct wnm_sleep_element *) pos;
else if (*pos == WLAN_EID_TFS_RESP) {
if (!tfsresp_ie_start)
tfsresp_ie_start = pos;
tfsresp_ie_end = pos;
} else
wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
pos += ie_len + 2;
}
if (!wnmsleep_ie) {
wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
return;
}
if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT) {
wpa_printf(MSG_DEBUG, "Successfully 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_CONFIRM,
wpa_s->bssid, NULL, NULL);
/* remove GTK/IGTK ?? */
/* set the TFS Resp IE(s) */
if (tfsresp_ie_start && tfsresp_ie_end &&
tfsresp_ie_end - tfsresp_ie_start >= 0) {
tfsresp_ie_len = (tfsresp_ie_end +
tfsresp_ie_end[1] + 2) -
tfsresp_ie_start;
wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
/*
* pass the TFS Resp IE(s) to driver for
* processing
*/
if (ieee80211_11_set_tfs_ie(
wpa_s, wpa_s->bssid,
tfsresp_ie_start,
&tfsresp_ie_len,
WNM_SLEEP_TFS_RESP_IE_SET))
wpa_printf(MSG_DEBUG, "Fail to set "
"TFS Resp IE");
}
} else if (wnmsleep_ie->action_type == 1) {
wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM,
wpa_s->bssid, NULL, NULL);
/* Install GTK/IGTK */
do {
/* point to key data field */
u8 *ptr = (u8 *) frm + 1 + 1 + 2;
while (ptr < (u8 *) frm + 4 + key_len_total) {
if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
gtk_len = *(ptr + 4);
wpa_wnmsleep_install_key(
wpa_s->wpa,
WNM_SLEEP_SUBELEM_GTK,
ptr);
ptr += 13 + gtk_len;
#ifdef CONFIG_IEEE80211W
} else if (*ptr ==
WNM_SLEEP_SUBELEM_IGTK) {
igtk_len = WPA_IGTK_LEN;
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 */

21
wpa_supplicant/wnm_sta.h Normal file
View file

@ -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 */