/* 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);
}
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 + 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 */
}
}
/* set the TFS IE to driver */
static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
const u8 *addr, const u8 *buf, u16 buf_len,
enum wnm_oper oper)
{
u16 len = buf_len;
wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
return wpa_drv_wnm_oper(wpa_s, oper, addr, (u8 *) buf, &len);
}
static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
const u8 *tfsresp_ie_start,
const 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 ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
const u8 *frm, int len)
{
/*
* Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data |
* WNM-Sleep Mode IE | TFS Response IE
*/
const u8 *pos = frm; /* point to payload after the action field */
u16 key_len_total;
struct wnm_sleep_element *wnmsleep_ie = NULL;
/* multiple TFS Resp IE (assuming consecutive) */
const u8 *tfsresp_ie_start = NULL;
const u8 *tfsresp_ie_end = NULL;
size_t left;
if (!wpa_s->wnmsleep_used) {
wpa_printf(MSG_DEBUG,
"WNM: Ignore WNM-Sleep Mode Response frame since WNM-Sleep Mode has not been used in this association");
return;
}
if (len < 3)
return;
key_len_total = WPA_GET_LE16(frm + 1);
wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d",
frm[0], key_len_total);
left = len - 3;
if (key_len_total > left) {
wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
return;
}
pos += 3 + key_len_total;
while (pos - frm + 1 < len) {
u8 ie_len = *(pos + 1);
if (2 + ie_len > frm + len - pos) {
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 && ie_len >= 4)
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 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);
}
}