3 * Copyright (c) 2011-2012, Qualcomm Atheros, Inc.
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
9 #include "utils/includes.h"
11 #include "utils/common.h"
12 #include "common/ieee802_11_defs.h"
13 #include "rsn_supp/wpa.h"
14 #include "wpa_supplicant_i.h"
17 #define MAX_TFS_IE_LEN 1024
20 /* get the TFS IE from driver */
21 static int ieee80211_11_get_tfs_ie(struct wpa_supplicant *wpa_s, u8 *buf,
22 u16 *buf_len, enum wnm_oper oper)
24 wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
26 return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len);
30 /* set the TFS IE to driver */
31 static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
32 const u8 *addr, u8 *buf, u16 *buf_len,
35 wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
37 return wpa_drv_wnm_oper(wpa_s, oper, addr, buf, buf_len);
41 /* MLME-SLEEPMODE.request */
42 int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
43 u8 action, u16 intval, struct wpabuf *tfs_req)
45 struct ieee80211_mgmt *mgmt;
48 struct wnm_sleep_element *wnmsleep_ie;
51 u16 wnmtfs_ie_len; /* possibly multiple IE(s) */
52 enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
53 WNM_SLEEP_TFS_REQ_IE_NONE;
55 wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request "
56 "action=%s to " MACSTR,
57 action == 0 ? "enter" : "exit",
58 MAC2STR(wpa_s->bssid));
60 /* WNM-Sleep Mode IE */
61 wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
62 wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
63 if (wnmsleep_ie == NULL)
65 wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
66 wnmsleep_ie->len = wnmsleep_ie_len - 2;
67 wnmsleep_ie->action_type = action;
68 wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
69 wnmsleep_ie->intval = host_to_le16(intval);
70 wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element",
71 (u8 *) wnmsleep_ie, wnmsleep_ie_len);
75 wnmtfs_ie_len = wpabuf_len(tfs_req);
76 wnmtfs_ie = os_malloc(wnmtfs_ie_len);
77 if (wnmtfs_ie == NULL) {
81 os_memcpy(wnmtfs_ie, wpabuf_head(tfs_req), wnmtfs_ie_len);
83 wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
84 if (wnmtfs_ie == NULL) {
88 if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
95 wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element",
96 (u8 *) wnmtfs_ie, wnmtfs_ie_len);
98 mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len);
100 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
101 "WNM-Sleep Request action frame");
105 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
106 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
107 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
108 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
109 WLAN_FC_STYPE_ACTION);
110 mgmt->u.action.category = WLAN_ACTION_WNM;
111 mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
112 mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1;
113 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
115 /* copy TFS IE here */
116 if (wnmtfs_ie_len > 0) {
117 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
118 wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
121 len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
124 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
125 wpa_s->own_addr, wpa_s->bssid,
126 &mgmt->u.action.category, len, 0);
128 wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
129 "(action=%d, intval=%d)", action, intval);
131 os_free(wnmsleep_ie);
139 static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
140 u8 *tfsresp_ie_start,
143 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
144 wpa_s->bssid, NULL, NULL);
145 /* remove GTK/IGTK ?? */
147 /* set the TFS Resp IE(s) */
148 if (tfsresp_ie_start && tfsresp_ie_end &&
149 tfsresp_ie_end - tfsresp_ie_start >= 0) {
151 tfsresp_ie_len = (tfsresp_ie_end + tfsresp_ie_end[1] + 2) -
153 wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
154 /* pass the TFS Resp IE(s) to driver for processing */
155 if (ieee80211_11_set_tfs_ie(wpa_s, wpa_s->bssid,
158 WNM_SLEEP_TFS_RESP_IE_SET))
159 wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE");
164 static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s,
165 const u8 *frm, u16 key_len_total)
170 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM, wpa_s->bssid,
173 /* Install GTK/IGTK */
175 /* point to key data field */
176 ptr = (u8 *) frm + 1 + 1 + 2;
177 end = ptr + key_len_total;
178 wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
180 while (ptr + 1 < end) {
181 if (ptr + 2 + ptr[1] > end) {
182 wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
185 wpa_hexdump(MSG_DEBUG, "WNM: Remaining data",
190 if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
191 if (ptr[1] < 11 + 5) {
192 wpa_printf(MSG_DEBUG, "WNM: Too short GTK "
196 gtk_len = *(ptr + 4);
197 if (ptr[1] < 11 + gtk_len ||
198 gtk_len < 5 || gtk_len > 32) {
199 wpa_printf(MSG_DEBUG, "WNM: Invalid GTK "
203 wpa_wnmsleep_install_key(
205 WNM_SLEEP_SUBELEM_GTK,
208 #ifdef CONFIG_IEEE80211W
209 } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) {
210 if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
211 wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
215 wpa_wnmsleep_install_key(wpa_s->wpa,
216 WNM_SLEEP_SUBELEM_IGTK, ptr);
217 ptr += 10 + WPA_IGTK_LEN;
218 #endif /* CONFIG_IEEE80211W */
220 break; /* skip the loop */
225 static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
226 const u8 *frm, int len)
229 * Action [1] | Diaglog Token [1] | Key Data Len [2] | Key Data |
230 * WNM-Sleep Mode IE | TFS Response IE
232 u8 *pos = (u8 *) frm; /* point to action field */
233 u16 key_len_total = le_to_host16(*((u16 *)(frm+2)));
234 struct wnm_sleep_element *wnmsleep_ie = NULL;
235 /* multiple TFS Resp IE (assuming consecutive) */
236 u8 *tfsresp_ie_start = NULL;
237 u8 *tfsresp_ie_end = NULL;
239 wpa_printf(MSG_DEBUG, "action=%d token = %d key_len_total = %d",
240 frm[0], frm[1], key_len_total);
241 pos += 4 + key_len_total;
242 if (pos > frm + len) {
243 wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
246 while (pos - frm < len) {
247 u8 ie_len = *(pos + 1);
248 if (pos + 2 + ie_len > frm + len) {
249 wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
252 wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
253 if (*pos == WLAN_EID_WNMSLEEP)
254 wnmsleep_ie = (struct wnm_sleep_element *) pos;
255 else if (*pos == WLAN_EID_TFS_RESP) {
256 if (!tfsresp_ie_start)
257 tfsresp_ie_start = pos;
258 tfsresp_ie_end = pos;
260 wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
265 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
269 if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT ||
270 wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
271 wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
272 "frame (action=%d, intval=%d)",
273 wnmsleep_ie->action_type, wnmsleep_ie->intval);
274 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) {
275 wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
277 } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
278 wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
281 wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
282 "(action=%d, intval=%d)",
283 wnmsleep_ie->action_type, wnmsleep_ie->intval);
284 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER)
285 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
286 wpa_s->bssid, NULL, NULL);
287 else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
288 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
289 wpa_s->bssid, NULL, NULL);
294 void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
295 struct rx_action *action)
297 u8 *pos = (u8 *) action->data; /* point to action field */
299 /* u8 dialog_token = *pos++; */
302 case WNM_SLEEP_MODE_RESP:
303 ieee802_11_rx_wnmsleep_resp(wpa_s, action->data, action->len);