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- /*
- * 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 */
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