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 int wifi_display_init(struct wpa_global *global)
21 global->wifi_display = 1;
26 void wifi_display_deinit(struct wpa_global *global)
29 for (i = 0; i < MAX_WFD_SUBELEMS; i++) {
30 wpabuf_free(global->wfd_subelem[i]);
31 global->wfd_subelem[i] = NULL;
36 static int wifi_display_update_wfd_ie(struct wpa_global *global)
38 struct wpabuf *ie, *buf;
41 wpa_printf(MSG_DEBUG, "WFD: Update WFD IE");
43 if (!global->wifi_display) {
44 wpa_printf(MSG_DEBUG, "WFD: Wi-Fi Display disabled - do not "
46 p2p_set_wfd_ie_beacon(global->p2p, NULL);
47 p2p_set_wfd_ie_probe_req(global->p2p, NULL);
48 p2p_set_wfd_ie_probe_resp(global->p2p, NULL);
49 p2p_set_wfd_ie_assoc_req(global->p2p, NULL);
50 p2p_set_wfd_ie_invitation(global->p2p, NULL);
51 p2p_set_wfd_ie_prov_disc_req(global->p2p, NULL);
52 p2p_set_wfd_ie_prov_disc_resp(global->p2p, NULL);
53 p2p_set_wfd_ie_go_neg(global->p2p, NULL);
54 p2p_set_wfd_dev_info(global->p2p, NULL);
55 p2p_set_wfd_assoc_bssid(global->p2p, NULL);
56 p2p_set_wfd_coupled_sink_info(global->p2p, NULL);
60 p2p_set_wfd_dev_info(global->p2p,
61 global->wfd_subelem[WFD_SUBELEM_DEVICE_INFO]);
62 p2p_set_wfd_assoc_bssid(
64 global->wfd_subelem[WFD_SUBELEM_ASSOCIATED_BSSID]);
65 p2p_set_wfd_coupled_sink_info(
66 global->p2p, global->wfd_subelem[WFD_SUBELEM_COUPLED_SINK]);
69 * WFD IE is included in number of management frames. Two different
70 * sets of subelements are included depending on the frame:
72 * Beacon, (Re)Association Request, GO Negotiation Req/Resp/Conf,
73 * Provision Discovery Req:
82 * [WFD Extended Capability]
88 * [WFD Extended Capability]
91 * (Re)Association Response, P2P Invitation Req/Resp,
92 * Provision Discovery Resp:
99 if (global->wfd_subelem[WFD_SUBELEM_DEVICE_INFO])
100 len += wpabuf_len(global->wfd_subelem[
101 WFD_SUBELEM_DEVICE_INFO]);
102 if (global->wfd_subelem[WFD_SUBELEM_ASSOCIATED_BSSID])
103 len += wpabuf_len(global->wfd_subelem[
104 WFD_SUBELEM_ASSOCIATED_BSSID]);
105 if (global->wfd_subelem[WFD_SUBELEM_COUPLED_SINK])
106 len += wpabuf_len(global->wfd_subelem[
107 WFD_SUBELEM_COUPLED_SINK]);
108 if (global->wfd_subelem[WFD_SUBELEM_SESSION_INFO])
109 len += wpabuf_len(global->wfd_subelem[
110 WFD_SUBELEM_SESSION_INFO]);
111 if (global->wfd_subelem[WFD_SUBELEM_EXT_CAPAB])
112 len += wpabuf_len(global->wfd_subelem[WFD_SUBELEM_EXT_CAPAB]);
113 buf = wpabuf_alloc(len);
117 if (global->wfd_subelem[WFD_SUBELEM_DEVICE_INFO])
119 global->wfd_subelem[WFD_SUBELEM_DEVICE_INFO]);
120 if (global->wfd_subelem[WFD_SUBELEM_ASSOCIATED_BSSID])
121 wpabuf_put_buf(buf, global->wfd_subelem[
122 WFD_SUBELEM_ASSOCIATED_BSSID]);
123 if (global->wfd_subelem[WFD_SUBELEM_COUPLED_SINK])
125 global->wfd_subelem[WFD_SUBELEM_COUPLED_SINK]);
127 ie = wifi_display_encaps(buf);
128 wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Beacon", ie);
129 p2p_set_wfd_ie_beacon(global->p2p, ie);
131 ie = wifi_display_encaps(buf);
132 wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for (Re)Association Request",
134 p2p_set_wfd_ie_assoc_req(global->p2p, ie);
136 ie = wifi_display_encaps(buf);
137 wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for GO Negotiation", ie);
138 p2p_set_wfd_ie_go_neg(global->p2p, ie);
140 ie = wifi_display_encaps(buf);
141 wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Provision Discovery "
143 p2p_set_wfd_ie_prov_disc_req(global->p2p, ie);
146 if (global->wfd_subelem[WFD_SUBELEM_EXT_CAPAB])
148 global->wfd_subelem[WFD_SUBELEM_EXT_CAPAB]);
150 ie = wifi_display_encaps(buf);
151 wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Probe Request", ie);
152 p2p_set_wfd_ie_probe_req(global->p2p, ie);
154 if (global->wfd_subelem[WFD_SUBELEM_SESSION_INFO])
156 global->wfd_subelem[WFD_SUBELEM_SESSION_INFO]);
157 ie = wifi_display_encaps(buf);
158 wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Probe Response", ie);
159 p2p_set_wfd_ie_probe_resp(global->p2p, ie);
161 /* Remove WFD Extended Capability from buffer */
163 if (global->wfd_subelem[WFD_SUBELEM_SESSION_INFO])
165 global->wfd_subelem[WFD_SUBELEM_SESSION_INFO]);
167 ie = wifi_display_encaps(buf);
168 wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for P2P Invitation", ie);
169 p2p_set_wfd_ie_invitation(global->p2p, ie);
171 ie = wifi_display_encaps(buf);
172 wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Provision Discovery "
174 p2p_set_wfd_ie_prov_disc_resp(global->p2p, ie);
182 void wifi_display_enable(struct wpa_global *global, int enabled)
184 wpa_printf(MSG_DEBUG, "WFD: Wi-Fi Display %s",
185 enabled ? "enabled" : "disabled");
186 global->wifi_display = enabled;
187 wifi_display_update_wfd_ie(global);
191 int wifi_display_subelem_set(struct wpa_global *global, char *cmd)
198 pos = os_strchr(cmd, ' ');
203 if (subelem < 0 || subelem >= MAX_WFD_SUBELEMS)
206 len = os_strlen(pos);
212 /* Clear subelement */
214 wpa_printf(MSG_DEBUG, "WFD: Clear subelement %d", subelem);
216 e = wpabuf_alloc(1 + len);
219 wpabuf_put_u8(e, subelem);
220 if (hexstr2bin(pos, wpabuf_put(e, len), len) < 0) {
224 wpa_printf(MSG_DEBUG, "WFD: Set subelement %d", subelem);
227 wpabuf_free(global->wfd_subelem[subelem]);
228 global->wfd_subelem[subelem] = e;
229 wifi_display_update_wfd_ie(global);
235 int wifi_display_subelem_get(struct wpa_global *global, char *cmd,
236 char *buf, size_t buflen)
241 if (subelem < 0 || subelem >= MAX_WFD_SUBELEMS)
244 if (global->wfd_subelem[subelem] == NULL)
247 return wpa_snprintf_hex(buf, buflen,
248 wpabuf_head_u8(global->wfd_subelem[subelem]) +
250 wpabuf_len(global->wfd_subelem[subelem]) - 1);