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WNM: Split WNM-Sleep Mode Response processing into separate functions

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Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2012-12-16 13:05:19 +02:00
parent df80a0ccff
commit 74b4a3606d
1 changed files with 89 additions and 77 deletions
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166
wpa_supplicant/wnm_sta.c
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@ -137,6 +137,92 @@ int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
}
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)
{
@ -146,12 +232,10 @@ static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
*/
u8 *pos = (u8 *) frm; /* point to action field */
u16 key_len_total = le_to_host16(*((u16 *)(frm+2)));
u8 gtk_len;
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);
@ -189,82 +273,10 @@ static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
"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_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");
}
wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
tfsresp_ie_end);
} else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
u8 *ptr, *end;
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 */
}
wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
}
} else {
wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "