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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" | |
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 */ | |
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, | |
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 | ||
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 | ||
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 */ |