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75cad1a0 XC |
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" | |
61c54976 JM |
14 | #include "wpa_supplicant_i.h" |
15 | #include "driver_i.h" | |
75cad1a0 XC |
16 | |
17 | #define MAX_TFS_IE_LEN 1024 | |
18 | ||
19 | #ifdef CONFIG_IEEE80211V | |
20 | ||
21 | /* get the TFS IE from driver */ | |
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 */ | |
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 */ | |
43 | int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s, | |
cd0ef657 | 44 | u8 action, u16 intval, struct wpabuf *tfs_req) |
75cad1a0 XC |
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 | ||
cd0ef657 JM |
56 | wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request " |
57 | "action=%s to " MACSTR, | |
58 | action == 0 ? "enter" : "exit", | |
59 | MAC2STR(wpa_s->bssid)); | |
60 | ||
75cad1a0 XC |
61 | /* WNM-Sleep Mode IE */ |
62 | wnmsleep_ie_len = sizeof(struct wnm_sleep_element); | |
63 | wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element)); | |
64 | if (wnmsleep_ie == NULL) | |
65 | return -1; | |
66 | wnmsleep_ie->eid = WLAN_EID_WNMSLEEP; | |
67 | wnmsleep_ie->len = wnmsleep_ie_len - 2; | |
68 | wnmsleep_ie->action_type = action; | |
69 | wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT; | |
e9199e31 | 70 | wnmsleep_ie->intval = host_to_le16(intval); |
cd0ef657 JM |
71 | wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element", |
72 | (u8 *) wnmsleep_ie, wnmsleep_ie_len); | |
75cad1a0 XC |
73 | |
74 | /* TFS IE(s) */ | |
cd0ef657 JM |
75 | if (tfs_req) { |
76 | wnmtfs_ie_len = wpabuf_len(tfs_req); | |
77 | wnmtfs_ie = os_malloc(wnmtfs_ie_len); | |
78 | if (wnmtfs_ie == NULL) { | |
79 | os_free(wnmsleep_ie); | |
80 | return -1; | |
81 | } | |
82 | os_memcpy(wnmtfs_ie, wpabuf_head(tfs_req), wnmtfs_ie_len); | |
83 | } else { | |
84 | wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN); | |
85 | if (wnmtfs_ie == NULL) { | |
86 | os_free(wnmsleep_ie); | |
87 | return -1; | |
88 | } | |
89 | if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len, | |
90 | tfs_oper)) { | |
91 | wnmtfs_ie_len = 0; | |
92 | os_free(wnmtfs_ie); | |
93 | wnmtfs_ie = NULL; | |
94 | } | |
75cad1a0 | 95 | } |
cd0ef657 JM |
96 | wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element", |
97 | (u8 *) wnmtfs_ie, wnmtfs_ie_len); | |
75cad1a0 XC |
98 | |
99 | mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len); | |
100 | if (mgmt == NULL) { | |
101 | wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for " | |
102 | "WNM-Sleep Request action frame"); | |
103 | return -1; | |
104 | } | |
105 | ||
106 | os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN); | |
107 | os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN); | |
108 | os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN); | |
109 | mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, | |
110 | WLAN_FC_STYPE_ACTION); | |
111 | mgmt->u.action.category = WLAN_ACTION_WNM; | |
112 | mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ; | |
e0c54a15 | 113 | mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1; |
75cad1a0 XC |
114 | os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie, |
115 | wnmsleep_ie_len); | |
116 | /* copy TFS IE here */ | |
117 | if (wnmtfs_ie_len > 0) { | |
118 | os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable + | |
119 | wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len); | |
120 | } | |
121 | ||
122 | len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len + | |
123 | wnmtfs_ie_len; | |
124 | ||
125 | res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, | |
126 | wpa_s->own_addr, wpa_s->bssid, | |
127 | &mgmt->u.action.category, len, 0); | |
128 | if (res < 0) | |
129 | wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request " | |
130 | "(action=%d, intval=%d)", action, intval); | |
131 | ||
132 | os_free(wnmsleep_ie); | |
133 | os_free(wnmtfs_ie); | |
134 | os_free(mgmt); | |
135 | ||
136 | return res; | |
137 | } | |
138 | ||
139 | ||
74b4a360 JM |
140 | static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s, |
141 | u8 *tfsresp_ie_start, | |
142 | u8 *tfsresp_ie_end) | |
143 | { | |
144 | wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM, | |
145 | wpa_s->bssid, NULL, NULL); | |
146 | /* remove GTK/IGTK ?? */ | |
147 | ||
148 | /* set the TFS Resp IE(s) */ | |
149 | if (tfsresp_ie_start && tfsresp_ie_end && | |
150 | tfsresp_ie_end - tfsresp_ie_start >= 0) { | |
151 | u16 tfsresp_ie_len; | |
152 | tfsresp_ie_len = (tfsresp_ie_end + tfsresp_ie_end[1] + 2) - | |
153 | tfsresp_ie_start; | |
154 | wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found"); | |
155 | /* pass the TFS Resp IE(s) to driver for processing */ | |
156 | if (ieee80211_11_set_tfs_ie(wpa_s, wpa_s->bssid, | |
157 | tfsresp_ie_start, | |
158 | &tfsresp_ie_len, | |
159 | WNM_SLEEP_TFS_RESP_IE_SET)) | |
160 | wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE"); | |
161 | } | |
162 | } | |
163 | ||
164 | ||
165 | static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s, | |
166 | const u8 *frm, u16 key_len_total) | |
167 | { | |
168 | u8 *ptr, *end; | |
169 | u8 gtk_len; | |
170 | ||
171 | wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM, wpa_s->bssid, | |
172 | NULL, NULL); | |
173 | ||
174 | /* Install GTK/IGTK */ | |
175 | ||
176 | /* point to key data field */ | |
177 | ptr = (u8 *) frm + 1 + 1 + 2; | |
178 | end = ptr + key_len_total; | |
179 | wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total); | |
180 | ||
181 | while (ptr + 1 < end) { | |
182 | if (ptr + 2 + ptr[1] > end) { | |
183 | wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element " | |
184 | "length"); | |
185 | if (end > ptr) { | |
186 | wpa_hexdump(MSG_DEBUG, "WNM: Remaining data", | |
187 | ptr, end - ptr); | |
188 | } | |
189 | break; | |
190 | } | |
191 | if (*ptr == WNM_SLEEP_SUBELEM_GTK) { | |
192 | if (ptr[1] < 11 + 5) { | |
193 | wpa_printf(MSG_DEBUG, "WNM: Too short GTK " | |
194 | "subelem"); | |
195 | break; | |
196 | } | |
197 | gtk_len = *(ptr + 4); | |
198 | if (ptr[1] < 11 + gtk_len || | |
199 | gtk_len < 5 || gtk_len > 32) { | |
200 | wpa_printf(MSG_DEBUG, "WNM: Invalid GTK " | |
201 | "subelem"); | |
202 | break; | |
203 | } | |
204 | wpa_wnmsleep_install_key( | |
205 | wpa_s->wpa, | |
206 | WNM_SLEEP_SUBELEM_GTK, | |
207 | ptr); | |
208 | ptr += 13 + gtk_len; | |
209 | #ifdef CONFIG_IEEE80211W | |
210 | } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) { | |
211 | if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) { | |
212 | wpa_printf(MSG_DEBUG, "WNM: Too short IGTK " | |
213 | "subelem"); | |
214 | break; | |
215 | } | |
216 | wpa_wnmsleep_install_key(wpa_s->wpa, | |
217 | WNM_SLEEP_SUBELEM_IGTK, ptr); | |
218 | ptr += 10 + WPA_IGTK_LEN; | |
219 | #endif /* CONFIG_IEEE80211W */ | |
220 | } else | |
221 | break; /* skip the loop */ | |
222 | } | |
223 | } | |
224 | ||
225 | ||
75cad1a0 XC |
226 | static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s, |
227 | const u8 *frm, int len) | |
228 | { | |
229 | /* | |
230 | * Action [1] | Diaglog Token [1] | Key Data Len [2] | Key Data | | |
231 | * WNM-Sleep Mode IE | TFS Response IE | |
232 | */ | |
233 | u8 *pos = (u8 *) frm; /* point to action field */ | |
234 | u16 key_len_total = le_to_host16(*((u16 *)(frm+2))); | |
75cad1a0 XC |
235 | struct wnm_sleep_element *wnmsleep_ie = NULL; |
236 | /* multiple TFS Resp IE (assuming consecutive) */ | |
237 | u8 *tfsresp_ie_start = NULL; | |
238 | u8 *tfsresp_ie_end = NULL; | |
75cad1a0 XC |
239 | |
240 | wpa_printf(MSG_DEBUG, "action=%d token = %d key_len_total = %d", | |
241 | frm[0], frm[1], key_len_total); | |
242 | pos += 4 + key_len_total; | |
68db9ab0 JM |
243 | if (pos > frm + len) { |
244 | wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field"); | |
245 | return; | |
246 | } | |
75cad1a0 XC |
247 | while (pos - frm < len) { |
248 | u8 ie_len = *(pos + 1); | |
68db9ab0 JM |
249 | if (pos + 2 + ie_len > frm + len) { |
250 | wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len); | |
251 | break; | |
252 | } | |
253 | wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len); | |
75cad1a0 XC |
254 | if (*pos == WLAN_EID_WNMSLEEP) |
255 | wnmsleep_ie = (struct wnm_sleep_element *) pos; | |
256 | else if (*pos == WLAN_EID_TFS_RESP) { | |
257 | if (!tfsresp_ie_start) | |
258 | tfsresp_ie_start = pos; | |
259 | tfsresp_ie_end = pos; | |
260 | } else | |
261 | wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos); | |
262 | pos += ie_len + 2; | |
263 | } | |
264 | ||
265 | if (!wnmsleep_ie) { | |
266 | wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found"); | |
267 | return; | |
268 | } | |
269 | ||
62f6fbb4 JM |
270 | if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT || |
271 | wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) { | |
75cad1a0 XC |
272 | wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response " |
273 | "frame (action=%d, intval=%d)", | |
274 | wnmsleep_ie->action_type, wnmsleep_ie->intval); | |
df80a0cc | 275 | if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) { |
74b4a360 JM |
276 | wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start, |
277 | tfsresp_ie_end); | |
df80a0cc | 278 | } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) { |
74b4a360 | 279 | wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total); |
75cad1a0 XC |
280 | } |
281 | } else { | |
282 | wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame " | |
283 | "(action=%d, intval=%d)", | |
284 | wnmsleep_ie->action_type, wnmsleep_ie->intval); | |
df80a0cc | 285 | if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) |
75cad1a0 XC |
286 | wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL, |
287 | wpa_s->bssid, NULL, NULL); | |
df80a0cc | 288 | else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) |
75cad1a0 XC |
289 | wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL, |
290 | wpa_s->bssid, NULL, NULL); | |
291 | } | |
292 | } | |
293 | ||
294 | ||
295 | void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s, | |
296 | struct rx_action *action) | |
297 | { | |
298 | u8 *pos = (u8 *) action->data; /* point to action field */ | |
299 | u8 act = *pos++; | |
300 | /* u8 dialog_token = *pos++; */ | |
301 | ||
302 | switch (act) { | |
303 | case WNM_SLEEP_MODE_RESP: | |
304 | ieee802_11_rx_wnmsleep_resp(wpa_s, action->data, action->len); | |
305 | break; | |
306 | default: | |
307 | break; | |
308 | } | |
309 | } | |
310 | ||
311 | #endif /* CONFIG_IEEE80211V */ |