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"
14 #include "../wpa_supplicant/wpa_supplicant_i.h"
15 #include "../wpa_supplicant/driver_i.h"
16
17 #define MAX_TFS_IE_LEN 1024
18
19 #ifdef CONFIG_IEEE80211V
20
21 /* get the TFS IE from driver */
ieee80211_11_get_tfs_ie(struct wpa_supplicant * wpa_s,u8 * buf,u16 * buf_len,enum wnm_oper oper)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 */
ieee80211_11_set_tfs_ie(struct wpa_supplicant * wpa_s,const u8 * addr,u8 * buf,u16 * buf_len,enum wnm_oper oper)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 */
ieee802_11_send_wnmsleep_req(struct wpa_supplicant * wpa_s,u8 action,u8 intval)43 int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
44 u8 action, u8 intval)
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
56 /* WNM-Sleep Mode IE */
57 wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
58 wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
59 if (wnmsleep_ie == NULL)
60 return -1;
61 wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
62 wnmsleep_ie->len = wnmsleep_ie_len - 2;
63 wnmsleep_ie->action_type = action;
64 wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
65 wnmsleep_ie->intval = intval;
66
67 /* TFS IE(s) */
68 wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
69 if (wnmtfs_ie == NULL) {
70 os_free(wnmsleep_ie);
71 return -1;
72 }
73 if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
74 tfs_oper)) {
75 wnmtfs_ie_len = 0;
76 os_free(wnmtfs_ie);
77 wnmtfs_ie = NULL;
78 }
79
80 mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len);
81 if (mgmt == NULL) {
82 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
83 "WNM-Sleep Request action frame");
84 return -1;
85 }
86
87 os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
88 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
89 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
90 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
91 WLAN_FC_STYPE_ACTION);
92 mgmt->u.action.category = WLAN_ACTION_WNM;
93 mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
94 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
95 wnmsleep_ie_len);
96 /* copy TFS IE here */
97 if (wnmtfs_ie_len > 0) {
98 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
99 wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
100 }
101
102 len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
103 wnmtfs_ie_len;
104
105 res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
106 wpa_s->own_addr, wpa_s->bssid,
107 &mgmt->u.action.category, len, 0);
108 if (res < 0)
109 wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
110 "(action=%d, intval=%d)", action, intval);
111
112 os_free(wnmsleep_ie);
113 os_free(wnmtfs_ie);
114 os_free(mgmt);
115
116 return res;
117 }
118
119
ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant * wpa_s,const u8 * frm,int len)120 static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
121 const u8 *frm, int len)
122 {
123 /*
124 * Action [1] | Diaglog Token [1] | Key Data Len [2] | Key Data |
125 * WNM-Sleep Mode IE | TFS Response IE
126 */
127 u8 *pos = (u8 *) frm; /* point to action field */
128 u16 key_len_total = le_to_host16(*((u16 *)(frm+2)));
129 u8 gtk_len;
130 #ifdef CONFIG_IEEE80211W
131 u8 igtk_len;
132 #endif /* CONFIG_IEEE80211W */
133 struct wnm_sleep_element *wnmsleep_ie = NULL;
134 /* multiple TFS Resp IE (assuming consecutive) */
135 u8 *tfsresp_ie_start = NULL;
136 u8 *tfsresp_ie_end = NULL;
137 u16 tfsresp_ie_len = 0;
138
139 wpa_printf(MSG_DEBUG, "action=%d token = %d key_len_total = %d",
140 frm[0], frm[1], key_len_total);
141 pos += 4 + key_len_total;
142 while (pos - frm < len) {
143 u8 ie_len = *(pos + 1);
144 if (*pos == WLAN_EID_WNMSLEEP)
145 wnmsleep_ie = (struct wnm_sleep_element *) pos;
146 else if (*pos == WLAN_EID_TFS_RESP) {
147 if (!tfsresp_ie_start)
148 tfsresp_ie_start = pos;
149 tfsresp_ie_end = pos;
150 } else
151 wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
152 pos += ie_len + 2;
153 }
154
155 if (!wnmsleep_ie) {
156 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
157 return;
158 }
159
160 if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT) {
161 wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
162 "frame (action=%d, intval=%d)",
163 wnmsleep_ie->action_type, wnmsleep_ie->intval);
164 if (wnmsleep_ie->action_type == 0) {
165 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
166 wpa_s->bssid, NULL, NULL);
167 /* remove GTK/IGTK ?? */
168
169 /* set the TFS Resp IE(s) */
170 if (tfsresp_ie_start && tfsresp_ie_end &&
171 tfsresp_ie_end - tfsresp_ie_start >= 0) {
172 tfsresp_ie_len = (tfsresp_ie_end +
173 tfsresp_ie_end[1] + 2) -
174 tfsresp_ie_start;
175 wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
176 /*
177 * pass the TFS Resp IE(s) to driver for
178 * processing
179 */
180 if (ieee80211_11_set_tfs_ie(
181 wpa_s, wpa_s->bssid,
182 tfsresp_ie_start,
183 &tfsresp_ie_len,
184 WNM_SLEEP_TFS_RESP_IE_SET))
185 wpa_printf(MSG_DEBUG, "Fail to set "
186 "TFS Resp IE");
187 }
188 } else if (wnmsleep_ie->action_type == 1) {
189 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM,
190 wpa_s->bssid, NULL, NULL);
191 /* Install GTK/IGTK */
192 do {
193 /* point to key data field */
194 u8 *ptr = (u8 *) frm + 1 + 1 + 2;
195 while (ptr < (u8 *) frm + 4 + key_len_total) {
196 if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
197 gtk_len = *(ptr + 4);
198 wpa_wnmsleep_install_key(
199 wpa_s->wpa,
200 WNM_SLEEP_SUBELEM_GTK,
201 ptr);
202 ptr += 13 + gtk_len;
203 #ifdef CONFIG_IEEE80211W
204 } else if (*ptr ==
205 WNM_SLEEP_SUBELEM_IGTK) {
206 igtk_len = WPA_IGTK_LEN;
207 wpa_wnmsleep_install_key(
208 wpa_s->wpa,
209 WNM_SLEEP_SUBELEM_IGTK,
210 ptr);
211 ptr += 10 + WPA_IGTK_LEN;
212 #endif /* CONFIG_IEEE80211W */
213 } else
214 break; /* skip the loop */
215 }
216 } while(0);
217 }
218 } else {
219 wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
220 "(action=%d, intval=%d)",
221 wnmsleep_ie->action_type, wnmsleep_ie->intval);
222 if (wnmsleep_ie->action_type == 0)
223 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
224 wpa_s->bssid, NULL, NULL);
225 else if (wnmsleep_ie->action_type == 1)
226 wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
227 wpa_s->bssid, NULL, NULL);
228 }
229 }
230
231
ieee802_11_rx_wnm_action(struct wpa_supplicant * wpa_s,struct rx_action * action)232 void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
233 struct rx_action *action)
234 {
235 u8 *pos = (u8 *) action->data; /* point to action field */
236 u8 act = *pos++;
237 /* u8 dialog_token = *pos++; */
238
239 switch (act) {
240 case WNM_SLEEP_MODE_RESP:
241 ieee802_11_rx_wnmsleep_resp(wpa_s, action->data, action->len);
242 break;
243 default:
244 break;
245 }
246 }
247
248 #endif /* CONFIG_IEEE80211V */
249