[thirdparty/hostap.git] / wpa_supplicant / wnm_sta.c

/*
 * 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_i.h"
#include "driver_i.h"
#include "scan.h"

#define MAX_TFS_IE_LEN  1024


/* 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, u16 intval, struct wpabuf *tfs_req)
{
	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;

	wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request "
		   "action=%s to " MACSTR,
		   action == 0 ? "enter" : "exit",
		   MAC2STR(wpa_s->bssid));

	/* 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 = host_to_le16(intval);
	wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element",
		    (u8 *) wnmsleep_ie, wnmsleep_ie_len);

	/* TFS IE(s) */
	if (tfs_req) {
		wnmtfs_ie_len = wpabuf_len(tfs_req);
		wnmtfs_ie = os_malloc(wnmtfs_ie_len);
		if (wnmtfs_ie == NULL) {
			os_free(wnmsleep_ie);
			return -1;
		}
		os_memcpy(wnmtfs_ie, wpabuf_head(tfs_req), wnmtfs_ie_len);
	} else {
		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;
		}
	}
	wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element",
		    (u8 *) wnmtfs_ie, wnmtfs_ie_len);

	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");
		os_free(wnmsleep_ie);
		os_free(wnmtfs_ie);
		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;
	mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1;
	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 wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
					 u8 *tfsresp_ie_start,
					 u8 *tfsresp_ie_end)
{
	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) {
		u16 tfsresp_ie_len;
		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, "WNM: Fail to set TFS Resp IE");
	}
}


static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s,
					const u8 *frm, u16 key_len_total)
{
	u8 *ptr, *end;
	u8 gtk_len;

	wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM,  wpa_s->bssid,
			 NULL, NULL);

	/* Install GTK/IGTK */

	/* point to key data field */
	ptr = (u8 *) frm + 1 + 1 + 2;
	end = ptr + key_len_total;
	wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);

	while (ptr + 1 < end) {
		if (ptr + 2 + ptr[1] > end) {
			wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
				   "length");
			if (end > ptr) {
				wpa_hexdump(MSG_DEBUG, "WNM: Remaining data",
					    ptr, end - ptr);
			}
			break;
		}
		if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
			if (ptr[1] < 11 + 5) {
				wpa_printf(MSG_DEBUG, "WNM: Too short GTK "
					   "subelem");
				break;
			}
			gtk_len = *(ptr + 4);
			if (ptr[1] < 11 + gtk_len ||
			    gtk_len < 5 || gtk_len > 32) {
				wpa_printf(MSG_DEBUG, "WNM: Invalid GTK "
					   "subelem");
				break;
			}
			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) {
			if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
				wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
					   "subelem");
				break;
			}
			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 */
	}
}


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)));
	struct wnm_sleep_element *wnmsleep_ie = NULL;
	/* multiple TFS Resp IE (assuming consecutive) */
	u8 *tfsresp_ie_start = NULL;
	u8 *tfsresp_ie_end = NULL;

	wpa_printf(MSG_DEBUG, "action=%d token = %d key_len_total = %d",
		   frm[0], frm[1], key_len_total);
	pos += 4 + key_len_total;
	if (pos > frm + len) {
		wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
		return;
	}
	while (pos - frm < len) {
		u8 ie_len = *(pos + 1);
		if (pos + 2 + ie_len > frm + len) {
			wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
			break;
		}
		wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
		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 ||
	    wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
		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 == WNM_SLEEP_MODE_ENTER) {
			wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
						     tfsresp_ie_end);
		} else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
			wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
		}
	} 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 == WNM_SLEEP_MODE_ENTER)
			wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
					 wpa_s->bssid, NULL, NULL);
		else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
			wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
					 wpa_s->bssid, NULL, NULL);
	}
}


static void wnm_send_bss_transition_mgmt_resp(struct wpa_supplicant *wpa_s,
					      u8 dialog_token, u8 status,
					      u8 delay, const u8 *target_bssid)
{
	u8 buf[1000], *pos;
	struct ieee80211_mgmt *mgmt;
	size_t len;

	wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Response "
		   "to " MACSTR " dialog_token=%u status=%u delay=%d",
		   MAC2STR(wpa_s->bssid), dialog_token, status, delay);

	mgmt = (struct ieee80211_mgmt *) buf;
	os_memset(&buf, 0, sizeof(buf));
	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.bss_tm_resp.action = WNM_BSS_TRANS_MGMT_RESP;
	mgmt->u.action.u.bss_tm_resp.dialog_token = dialog_token;
	mgmt->u.action.u.bss_tm_resp.status_code = status;
	mgmt->u.action.u.bss_tm_resp.bss_termination_delay = delay;
	pos = mgmt->u.action.u.bss_tm_resp.variable;
	if (target_bssid) {
		os_memcpy(pos, target_bssid, ETH_ALEN);
		pos += ETH_ALEN;
	}

	len = pos - (u8 *) &mgmt->u.action.category;

	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);
}


static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
					     const u8 *pos, const u8 *end,
					     int reply)
{
	u8 dialog_token;
	u8 mode;
	u16 disassoc_timer;

	if (pos + 5 > end)
		return;

	dialog_token = pos[0];
	mode = pos[1];
	disassoc_timer = WPA_GET_LE16(pos + 2);

	wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
		   "dialog_token=%u request_mode=0x%x "
		   "disassoc_timer=%u validity_interval=%u",
		   dialog_token, mode, disassoc_timer, pos[4]);
	pos += 5;
	if (mode & 0x08)
		pos += 12; /* BSS Termination Duration */
	if (mode & 0x10) {
		char url[256];
		if (pos + 1 > end || pos + 1 + pos[0] > end) {
			wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
				   "Management Request (URL)");
			return;
		}
		os_memcpy(url, pos + 1, pos[0]);
		url[pos[0]] = '\0';
		wpa_msg(wpa_s, MSG_INFO, "WNM: ESS Disassociation Imminent - "
			"session_info_url=%s", url);
	}

	if (mode & 0x04) {
		wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
			"Disassociation Timer %u", disassoc_timer);
		if (disassoc_timer && !wpa_s->scanning) {
			/* TODO: mark current BSS less preferred for
			 * selection */
			wpa_printf(MSG_DEBUG, "Trying to find another BSS");
			wpa_supplicant_req_scan(wpa_s, 0, 0);
		}
	}

	if (reply) {
		/* TODO: add support for reporting Accept */
		wnm_send_bss_transition_mgmt_resp(wpa_s, dialog_token,
						  1 /* Reject - unspecified */,
						  0, NULL);
	}
}


void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
			      struct rx_action *action)
{
	const u8 *pos, *end;
	u8 act;

	if (action->data == NULL || action->len == 0)
		return;

	pos = action->data;
	end = pos + action->len;
	act = *pos++;

	wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
		   act, MAC2STR(action->sa));
	if (wpa_s->wpa_state < WPA_ASSOCIATED ||
	    os_memcmp(action->sa, wpa_s->bssid, ETH_ALEN) != 0) {
		wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
			   "frame");
		return;
	}

	switch (act) {
	case WNM_BSS_TRANS_MGMT_REQ:
		ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
						 !(action->da[0] & 0x01));
		break;
	case WNM_SLEEP_MODE_RESP:
		ieee802_11_rx_wnmsleep_resp(wpa_s, action->data, action->len);
		break;
	default:
		break;
	}
}
Commit	Line	Data
75cad1a0 XC	1	/*
	2	* wpa_supplicant - WNM
	3	* Copyright (c) 2011-2012, Qualcomm Atheros, Inc.
	4	*
	5	* This software may be distributed under the terms of the BSD license.
	6	* See README for more details.
	7	*/
	8
	9	#include "utils/includes.h"
	10
	11	#include "utils/common.h"
	12	#include "common/ieee802_11_defs.h"
	13	#include "rsn_supp/wpa.h"
61c54976 JM	14	#include "wpa_supplicant_i.h"
61c54976 JM	15	#include "driver_i.h"
2049a875	16	#include "scan.h"
75cad1a0 XC	17
	18	#define MAX_TFS_IE_LEN 1024
	19
75cad1a0 XC	20
	21	/* get the TFS IE from driver */
	22	static int ieee80211_11_get_tfs_ie(struct wpa_supplicant wpa_s, u8 buf,
	23	u16 *buf_len, enum wnm_oper oper)
	24	{
	25	wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
	26
	27	return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len);
	28	}
	29
	30
	31	/* set the TFS IE to driver */
	32	static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
	33	const u8 addr, u8 buf, u16 *buf_len,
	34	enum wnm_oper oper)
	35	{
	36	wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
	37
	38	return wpa_drv_wnm_oper(wpa_s, oper, addr, buf, buf_len);
	39	}
	40
	41
	42	/* MLME-SLEEPMODE.request */
	43	int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
cd0ef657	44	u8 action, u16 intval, struct wpabuf *tfs_req)
75cad1a0 XC	45	{
	46	struct ieee80211_mgmt *mgmt;
	47	int res;
	48	size_t len;
	49	struct wnm_sleep_element *wnmsleep_ie;
	50	u8 *wnmtfs_ie;
	51	u8 wnmsleep_ie_len;
	52	u16 wnmtfs_ie_len; /* possibly multiple IE(s) */
	53	enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
	54	WNM_SLEEP_TFS_REQ_IE_NONE;
	55
cd0ef657 JM	56	wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request "
	57	"action=%s to " MACSTR,
	58	action == 0 ? "enter" : "exit",
	59	MAC2STR(wpa_s->bssid));
	60
75cad1a0 XC	61	/* WNM-Sleep Mode IE */
	62	wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
	63	wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
	64	if (wnmsleep_ie == NULL)
	65	return -1;
	66	wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
	67	wnmsleep_ie->len = wnmsleep_ie_len - 2;
	68	wnmsleep_ie->action_type = action;
	69	wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
e9199e31	70	wnmsleep_ie->intval = host_to_le16(intval);
cd0ef657 JM	71	wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element",
cd0ef657 JM	72	(u8 *) wnmsleep_ie, wnmsleep_ie_len);
75cad1a0 XC	73
75cad1a0 XC	74	/* TFS IE(s) */
cd0ef657 JM	75	if (tfs_req) {
	76	wnmtfs_ie_len = wpabuf_len(tfs_req);
	77	wnmtfs_ie = os_malloc(wnmtfs_ie_len);
	78	if (wnmtfs_ie == NULL) {
	79	os_free(wnmsleep_ie);
	80	return -1;
	81	}
	82	os_memcpy(wnmtfs_ie, wpabuf_head(tfs_req), wnmtfs_ie_len);
	83	} else {
	84	wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
	85	if (wnmtfs_ie == NULL) {
	86	os_free(wnmsleep_ie);
	87	return -1;
	88	}
	89	if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
	90	tfs_oper)) {
	91	wnmtfs_ie_len = 0;
	92	os_free(wnmtfs_ie);
	93	wnmtfs_ie = NULL;
	94	}
75cad1a0	95	}
cd0ef657 JM	96	wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element",
cd0ef657 JM	97	(u8 *) wnmtfs_ie, wnmtfs_ie_len);
75cad1a0 XC	98
	99	mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len);
	100	if (mgmt == NULL) {
	101	wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
	102	"WNM-Sleep Request action frame");
14df897c JM	103	os_free(wnmsleep_ie);
14df897c JM	104	os_free(wnmtfs_ie);
75cad1a0 XC	105	return -1;
	106	}
	107
	108	os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
	109	os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
	110	os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
	111	mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
	112	WLAN_FC_STYPE_ACTION);
	113	mgmt->u.action.category = WLAN_ACTION_WNM;
	114	mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
e0c54a15	115	mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1;
75cad1a0 XC	116	os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
	117	wnmsleep_ie_len);
	118	/* copy TFS IE here */
	119	if (wnmtfs_ie_len > 0) {
	120	os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
	121	wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
	122	}
	123
	124	len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
	125	wnmtfs_ie_len;
	126
	127	res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
	128	wpa_s->own_addr, wpa_s->bssid,
	129	&mgmt->u.action.category, len, 0);
	130	if (res < 0)
	131	wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
	132	"(action=%d, intval=%d)", action, intval);
	133
	134	os_free(wnmsleep_ie);
	135	os_free(wnmtfs_ie);
	136	os_free(mgmt);
	137
	138	return res;
	139	}
	140
	141
74b4a360 JM	142	static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
	143	u8 *tfsresp_ie_start,
	144	u8 *tfsresp_ie_end)
	145	{
	146	wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
	147	wpa_s->bssid, NULL, NULL);
	148	/* remove GTK/IGTK ?? */
	149
	150	/* set the TFS Resp IE(s) */
	151	if (tfsresp_ie_start && tfsresp_ie_end &&
	152	tfsresp_ie_end - tfsresp_ie_start >= 0) {
	153	u16 tfsresp_ie_len;
	154	tfsresp_ie_len = (tfsresp_ie_end + tfsresp_ie_end[1] + 2) -
	155	tfsresp_ie_start;
	156	wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
	157	/* pass the TFS Resp IE(s) to driver for processing */
	158	if (ieee80211_11_set_tfs_ie(wpa_s, wpa_s->bssid,
	159	tfsresp_ie_start,
	160	&tfsresp_ie_len,
	161	WNM_SLEEP_TFS_RESP_IE_SET))
	162	wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE");
	163	}
	164	}
	165
	166
	167	static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s,
	168	const u8 *frm, u16 key_len_total)
	169	{
	170	u8 ptr, end;
	171	u8 gtk_len;
	172
	173	wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM, wpa_s->bssid,
	174	NULL, NULL);
	175
	176	/* Install GTK/IGTK */
	177
	178	/* point to key data field */
	179	ptr = (u8 *) frm + 1 + 1 + 2;
	180	end = ptr + key_len_total;
	181	wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
	182
	183	while (ptr + 1 < end) {
	184	if (ptr + 2 + ptr[1] > end) {
	185	wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
	186	"length");
	187	if (end > ptr) {
	188	wpa_hexdump(MSG_DEBUG, "WNM: Remaining data",
	189	ptr, end - ptr);
	190	}
	191	break;
	192	}
	193	if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
	194	if (ptr[1] < 11 + 5) {
	195	wpa_printf(MSG_DEBUG, "WNM: Too short GTK "
	196	"subelem");
	197	break;
	198	}
	199	gtk_len = *(ptr + 4);
	200	if (ptr[1] < 11 + gtk_len \|\|
	201	gtk_len < 5 \|\| gtk_len > 32) {
	202	wpa_printf(MSG_DEBUG, "WNM: Invalid GTK "
	203	"subelem");
	204	break;
	205	}
206	wpa_wnmsleep_install_key(
207	wpa_s->wpa,
208	WNM_SLEEP_SUBELEM_GTK,
209	ptr);
210	ptr += 13 + gtk_len;
211	#ifdef CONFIG_IEEE80211W
212	} else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) {
213	if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
214	wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
215	"subelem");
216	break;
217	}
218	wpa_wnmsleep_install_key(wpa_s->wpa,
219	WNM_SLEEP_SUBELEM_IGTK, ptr);
220	ptr += 10 + WPA_IGTK_LEN;
221	#endif /* CONFIG_IEEE80211W */
222	} else
223	break; /* skip the loop */
224	}
225	}
226
227
75cad1a0 XC	228	static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
	229	const u8 *frm, int len)
	230	{
	231	/*
	232	* Action [1] \| Diaglog Token [1] \| Key Data Len [2] \| Key Data \|
	233	* WNM-Sleep Mode IE \| TFS Response IE
	234	*/
	235	u8 pos = (u8 ) frm; /* point to action field */
	236	u16 key_len_total = le_to_host16(((u16 )(frm+2)));
75cad1a0 XC	237	struct wnm_sleep_element *wnmsleep_ie = NULL;
	238	/* multiple TFS Resp IE (assuming consecutive) */
	239	u8 *tfsresp_ie_start = NULL;
	240	u8 *tfsresp_ie_end = NULL;
75cad1a0 XC	241
	242	wpa_printf(MSG_DEBUG, "action=%d token = %d key_len_total = %d",
	243	frm[0], frm[1], key_len_total);
	244	pos += 4 + key_len_total;
68db9ab0 JM	245	if (pos > frm + len) {
	246	wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
	247	return;
	248	}
75cad1a0 XC	249	while (pos - frm < len) {
75cad1a0 XC	250	u8 ie_len = *(pos + 1);
68db9ab0 JM	251	if (pos + 2 + ie_len > frm + len) {
	252	wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
	253	break;
	254	}
	255	wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
75cad1a0 XC	256	if (*pos == WLAN_EID_WNMSLEEP)
	257	wnmsleep_ie = (struct wnm_sleep_element *) pos;
	258	else if (*pos == WLAN_EID_TFS_RESP) {
	259	if (!tfsresp_ie_start)
	260	tfsresp_ie_start = pos;
	261	tfsresp_ie_end = pos;
	262	} else
	263	wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
	264	pos += ie_len + 2;
	265	}
	266
	267	if (!wnmsleep_ie) {
	268	wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
	269	return;
	270	}
	271
62f6fbb4 JM	272	if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT \|\|
62f6fbb4 JM	273	wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
75cad1a0 XC	274	wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
	275	"frame (action=%d, intval=%d)",
	276	wnmsleep_ie->action_type, wnmsleep_ie->intval);
df80a0cc	277	if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) {
74b4a360 JM	278	wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
74b4a360 JM	279	tfsresp_ie_end);
df80a0cc	280	} else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
74b4a360	281	wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
75cad1a0 XC	282	}
	283	} else {
	284	wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
	285	"(action=%d, intval=%d)",
	286	wnmsleep_ie->action_type, wnmsleep_ie->intval);
df80a0cc	287	if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER)
75cad1a0 XC	288	wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
75cad1a0 XC	289	wpa_s->bssid, NULL, NULL);
df80a0cc	290	else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
75cad1a0 XC	291	wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
	292	wpa_s->bssid, NULL, NULL);
	293	}
	294	}
	295
	296
2049a875 JM	297	static void wnm_send_bss_transition_mgmt_resp(struct wpa_supplicant *wpa_s,
	298	u8 dialog_token, u8 status,
	299	u8 delay, const u8 *target_bssid)
	300	{
	301	u8 buf[1000], *pos;
	302	struct ieee80211_mgmt *mgmt;
	303	size_t len;
	304
	305	wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Response "
	306	"to " MACSTR " dialog_token=%u status=%u delay=%d",
	307	MAC2STR(wpa_s->bssid), dialog_token, status, delay);
	308
	309	mgmt = (struct ieee80211_mgmt *) buf;
	310	os_memset(&buf, 0, sizeof(buf));
	311	os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
	312	os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
	313	os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
	314	mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
	315	WLAN_FC_STYPE_ACTION);
	316	mgmt->u.action.category = WLAN_ACTION_WNM;
	317	mgmt->u.action.u.bss_tm_resp.action = WNM_BSS_TRANS_MGMT_RESP;
	318	mgmt->u.action.u.bss_tm_resp.dialog_token = dialog_token;
	319	mgmt->u.action.u.bss_tm_resp.status_code = status;
	320	mgmt->u.action.u.bss_tm_resp.bss_termination_delay = delay;
	321	pos = mgmt->u.action.u.bss_tm_resp.variable;
	322	if (target_bssid) {
	323	os_memcpy(pos, target_bssid, ETH_ALEN);
	324	pos += ETH_ALEN;
	325	}
	326
	327	len = pos - (u8 *) &mgmt->u.action.category;
	328
	329	wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
	330	wpa_s->own_addr, wpa_s->bssid,
	331	&mgmt->u.action.category, len, 0);
	332	}
	333
	334
	335	static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
	336	const u8 pos, const u8 end,
	337	int reply)
	338	{
	339	u8 dialog_token;
	340	u8 mode;
	341	u16 disassoc_timer;
	342
	343	if (pos + 5 > end)
	344	return;
	345
	346	dialog_token = pos[0];
	347	mode = pos[1];
	348	disassoc_timer = WPA_GET_LE16(pos + 2);
	349
	350	wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
	351	"dialog_token=%u request_mode=0x%x "
	352	"disassoc_timer=%u validity_interval=%u",
	353	dialog_token, mode, disassoc_timer, pos[4]);
	354	pos += 5;
	355	if (mode & 0x08)
	356	pos += 12; /* BSS Termination Duration */
	357	if (mode & 0x10) {
	358	char url[256];
	359	if (pos + 1 > end \|\| pos + 1 + pos[0] > end) {
	360	wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
361	"Management Request (URL)");
362	return;
363	}
364	os_memcpy(url, pos + 1, pos[0]);
365	url[pos[0]] = '\0';
366	wpa_msg(wpa_s, MSG_INFO, "WNM: ESS Disassociation Imminent - "
367	"session_info_url=%s", url);
368	}
369
370	if (mode & 0x04) {
371	wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
372	"Disassociation Timer %u", disassoc_timer);
373	if (disassoc_timer && !wpa_s->scanning) {
374	/* TODO: mark current BSS less preferred for
375	* selection */
376	wpa_printf(MSG_DEBUG, "Trying to find another BSS");
377	wpa_supplicant_req_scan(wpa_s, 0, 0);
378	}
379	}
380
381	if (reply) {
382	/* TODO: add support for reporting Accept */
383	wnm_send_bss_transition_mgmt_resp(wpa_s, dialog_token,
384	1 /* Reject - unspecified */,
385	0, NULL);
386	}
387	}
388
389
75cad1a0 XC	390	void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
	391	struct rx_action *action)
	392	{
27c77751	393	const u8 pos, end;
2049a875	394	u8 act;
27c77751 JM	395
	396	if (action->data == NULL \|\| action->len == 0)
	397	return;
	398
	399	pos = action->data;
	400	end = pos + action->len;
	401	act = *pos++;
	402
	403	wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
	404	act, MAC2STR(action->sa));
2049a875 JM	405	if (wpa_s->wpa_state < WPA_ASSOCIATED \|\|
	406	os_memcmp(action->sa, wpa_s->bssid, ETH_ALEN) != 0) {
	407	wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
	408	"frame");
	409	return;
	410	}
75cad1a0 XC	411
75cad1a0 XC	412	switch (act) {
27c77751	413	case WNM_BSS_TRANS_MGMT_REQ:
2049a875 JM	414	ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
2049a875 JM	415	!(action->da[0] & 0x01));
27c77751	416	break;
75cad1a0 XC	417	case WNM_SLEEP_MODE_RESP:
	418	ieee802_11_rx_wnmsleep_resp(wpa_s, action->data, action->len);
	419	break;
	420	default:
	421	break;
	422	}
	423	}