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authorXi Chen <xichen@qca.qualcomm.com>2012-02-26 15:27:19 (GMT)
committerJouni Malinen <j@w1.fi>2012-08-01 10:21:27 (GMT)
commit75cad1a0d4383ca13e2e494fd353614da9bfee31 (patch)
tree65eb3e7025f1ee24d8ec02eff6dca595d28e4c3e /wpa_supplicant/wnm_sta.c
parentd32d94dbf47a3baced194e99931601e18f4e0549 (diff)
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WNM: Add WNM-Sleep Mode for station mode
Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
Diffstat (limited to 'wpa_supplicant/wnm_sta.c')
-rw-r--r--wpa_supplicant/wnm_sta.c248
1 files changed, 248 insertions, 0 deletions
diff --git a/wpa_supplicant/wnm_sta.c b/wpa_supplicant/wnm_sta.c
new file mode 100644
index 0000000..98ce966
--- /dev/null
+++ b/wpa_supplicant/wnm_sta.c
@@ -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 */