2 * wpa_supplicant - Wi-Fi Display
3 * Copyright (c) 2011, Atheros Communications, Inc.
4 * Copyright (c) 2011-2012, Qualcomm Atheros, Inc.
6 * This software may be distributed under the terms of the BSD license.
7 * See README for more details.
14 #include "common/ieee802_11_defs.h"
15 #include "wpa_supplicant_i.h"
16 #include "wifi_display.h"
19 #define WIFI_DISPLAY_SUBELEM_HEADER_LEN 3
22 int wifi_display_init(struct wpa_global *global)
24 global->wifi_display = 1;
29 void wifi_display_deinit(struct wpa_global *global)
32 for (i = 0; i < MAX_WFD_SUBELEMS; i++) {
33 wpabuf_free(global->wfd_subelem[i]);
34 global->wfd_subelem[i] = NULL;
39 static int wifi_display_update_wfd_ie(struct wpa_global *global)
41 struct wpabuf *ie, *buf;
44 wpa_printf(MSG_DEBUG, "WFD: Update WFD IE");
46 if (!global->wifi_display) {
47 wpa_printf(MSG_DEBUG, "WFD: Wi-Fi Display disabled - do not "
49 p2p_set_wfd_ie_beacon(global->p2p, NULL);
50 p2p_set_wfd_ie_probe_req(global->p2p, NULL);
51 p2p_set_wfd_ie_probe_resp(global->p2p, NULL);
52 p2p_set_wfd_ie_assoc_req(global->p2p, NULL);
53 p2p_set_wfd_ie_invitation(global->p2p, NULL);
54 p2p_set_wfd_ie_prov_disc_req(global->p2p, NULL);
55 p2p_set_wfd_ie_prov_disc_resp(global->p2p, NULL);
56 p2p_set_wfd_ie_go_neg(global->p2p, NULL);
57 p2p_set_wfd_dev_info(global->p2p, NULL);
58 p2p_set_wfd_assoc_bssid(global->p2p, NULL);
59 p2p_set_wfd_coupled_sink_info(global->p2p, NULL);
63 p2p_set_wfd_dev_info(global->p2p,
64 global->wfd_subelem[WFD_SUBELEM_DEVICE_INFO]);
65 p2p_set_wfd_assoc_bssid(
67 global->wfd_subelem[WFD_SUBELEM_ASSOCIATED_BSSID]);
68 p2p_set_wfd_coupled_sink_info(
69 global->p2p, global->wfd_subelem[WFD_SUBELEM_COUPLED_SINK]);
72 * WFD IE is included in number of management frames. Two different
73 * sets of subelements are included depending on the frame:
75 * Beacon, (Re)Association Request, GO Negotiation Req/Resp/Conf,
76 * Provision Discovery Req:
85 * [WFD Extended Capability]
91 * [WFD Extended Capability]
94 * (Re)Association Response, P2P Invitation Req/Resp,
95 * Provision Discovery Resp:
102 if (global->wfd_subelem[WFD_SUBELEM_DEVICE_INFO])
103 len += wpabuf_len(global->wfd_subelem[
104 WFD_SUBELEM_DEVICE_INFO]);
105 if (global->wfd_subelem[WFD_SUBELEM_ASSOCIATED_BSSID])
106 len += wpabuf_len(global->wfd_subelem[
107 WFD_SUBELEM_ASSOCIATED_BSSID]);
108 if (global->wfd_subelem[WFD_SUBELEM_COUPLED_SINK])
109 len += wpabuf_len(global->wfd_subelem[
110 WFD_SUBELEM_COUPLED_SINK]);
111 if (global->wfd_subelem[WFD_SUBELEM_SESSION_INFO])
112 len += wpabuf_len(global->wfd_subelem[
113 WFD_SUBELEM_SESSION_INFO]);
114 if (global->wfd_subelem[WFD_SUBELEM_EXT_CAPAB])
115 len += wpabuf_len(global->wfd_subelem[WFD_SUBELEM_EXT_CAPAB]);
116 buf = wpabuf_alloc(len);
120 if (global->wfd_subelem[WFD_SUBELEM_DEVICE_INFO])
122 global->wfd_subelem[WFD_SUBELEM_DEVICE_INFO]);
123 if (global->wfd_subelem[WFD_SUBELEM_ASSOCIATED_BSSID])
124 wpabuf_put_buf(buf, global->wfd_subelem[
125 WFD_SUBELEM_ASSOCIATED_BSSID]);
126 if (global->wfd_subelem[WFD_SUBELEM_COUPLED_SINK])
128 global->wfd_subelem[WFD_SUBELEM_COUPLED_SINK]);
130 ie = wifi_display_encaps(buf);
131 wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Beacon", ie);
132 p2p_set_wfd_ie_beacon(global->p2p, ie);
134 ie = wifi_display_encaps(buf);
135 wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for (Re)Association Request",
137 p2p_set_wfd_ie_assoc_req(global->p2p, ie);
139 ie = wifi_display_encaps(buf);
140 wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for GO Negotiation", ie);
141 p2p_set_wfd_ie_go_neg(global->p2p, ie);
143 ie = wifi_display_encaps(buf);
144 wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Provision Discovery "
146 p2p_set_wfd_ie_prov_disc_req(global->p2p, ie);
149 if (global->wfd_subelem[WFD_SUBELEM_EXT_CAPAB])
151 global->wfd_subelem[WFD_SUBELEM_EXT_CAPAB]);
153 ie = wifi_display_encaps(buf);
154 wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Probe Request", ie);
155 p2p_set_wfd_ie_probe_req(global->p2p, ie);
157 if (global->wfd_subelem[WFD_SUBELEM_SESSION_INFO])
159 global->wfd_subelem[WFD_SUBELEM_SESSION_INFO]);
160 ie = wifi_display_encaps(buf);
161 wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Probe Response", ie);
162 p2p_set_wfd_ie_probe_resp(global->p2p, ie);
164 /* Remove WFD Extended Capability from buffer */
166 if (global->wfd_subelem[WFD_SUBELEM_SESSION_INFO])
168 global->wfd_subelem[WFD_SUBELEM_SESSION_INFO]);
170 ie = wifi_display_encaps(buf);
171 wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for P2P Invitation", ie);
172 p2p_set_wfd_ie_invitation(global->p2p, ie);
174 ie = wifi_display_encaps(buf);
175 wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Provision Discovery "
177 p2p_set_wfd_ie_prov_disc_resp(global->p2p, ie);
185 void wifi_display_enable(struct wpa_global *global, int enabled)
187 wpa_printf(MSG_DEBUG, "WFD: Wi-Fi Display %s",
188 enabled ? "enabled" : "disabled");
189 global->wifi_display = enabled;
190 wifi_display_update_wfd_ie(global);
194 int wifi_display_subelem_set(struct wpa_global *global, char *cmd)
201 pos = os_strchr(cmd, ' ');
206 if (subelem < 0 || subelem >= MAX_WFD_SUBELEMS)
209 len = os_strlen(pos);
215 /* Clear subelement */
217 wpa_printf(MSG_DEBUG, "WFD: Clear subelement %d", subelem);
219 e = wpabuf_alloc(1 + len);
222 wpabuf_put_u8(e, subelem);
223 if (hexstr2bin(pos, wpabuf_put(e, len), len) < 0) {
227 wpa_printf(MSG_DEBUG, "WFD: Set subelement %d", subelem);
230 wpabuf_free(global->wfd_subelem[subelem]);
231 global->wfd_subelem[subelem] = e;
232 wifi_display_update_wfd_ie(global);
238 int wifi_display_subelem_get(struct wpa_global *global, char *cmd,
239 char *buf, size_t buflen)
244 if (subelem < 0 || subelem >= MAX_WFD_SUBELEMS)
247 if (global->wfd_subelem[subelem] == NULL)
250 return wpa_snprintf_hex(buf, buflen,
251 wpabuf_head_u8(global->wfd_subelem[subelem]) +
253 wpabuf_len(global->wfd_subelem[subelem]) - 1);
257 char * wifi_display_subelem_hex(const struct wpabuf *wfd_subelems, u8 id)
259 char *subelem = NULL;
268 buf = wpabuf_head_u8(wfd_subelems);
272 buflen = wpabuf_len(wfd_subelems);
274 while (i + WIFI_DISPLAY_SUBELEM_HEADER_LEN < buflen) {
275 elen = WPA_GET_BE16(buf + i + 1);
278 subelem = os_zalloc(2 * elen + 1);
281 wpa_snprintf_hex(subelem, 2 * elen + 1,
283 WIFI_DISPLAY_SUBELEM_HEADER_LEN,
288 i += elen + WIFI_DISPLAY_SUBELEM_HEADER_LEN;