252 lines
6.7 KiB
C
252 lines
6.7 KiB
C
/*
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* wpa_supplicant - Wi-Fi Display
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* Copyright (c) 2011, Atheros Communications, Inc.
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* Copyright (c) 2011-2012, Qualcomm Atheros, Inc.
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#include "includes.h"
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#include "common.h"
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#include "p2p/p2p.h"
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#include "common/ieee802_11_defs.h"
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#include "wpa_supplicant_i.h"
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#include "wifi_display.h"
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int wifi_display_init(struct wpa_global *global)
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{
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global->wifi_display = 1;
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return 0;
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}
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void wifi_display_deinit(struct wpa_global *global)
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{
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int i;
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for (i = 0; i < MAX_WFD_SUBELEMS; i++) {
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wpabuf_free(global->wfd_subelem[i]);
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global->wfd_subelem[i] = NULL;
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}
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}
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static int wifi_display_update_wfd_ie(struct wpa_global *global)
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{
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struct wpabuf *ie, *buf;
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size_t len, plen;
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wpa_printf(MSG_DEBUG, "WFD: Update WFD IE");
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if (!global->wifi_display) {
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wpa_printf(MSG_DEBUG, "WFD: Wi-Fi Display disabled - do not "
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"include WFD IE");
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p2p_set_wfd_ie_beacon(global->p2p, NULL);
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p2p_set_wfd_ie_probe_req(global->p2p, NULL);
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p2p_set_wfd_ie_probe_resp(global->p2p, NULL);
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p2p_set_wfd_ie_assoc_req(global->p2p, NULL);
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p2p_set_wfd_ie_invitation(global->p2p, NULL);
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p2p_set_wfd_ie_prov_disc_req(global->p2p, NULL);
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p2p_set_wfd_ie_prov_disc_resp(global->p2p, NULL);
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p2p_set_wfd_ie_go_neg(global->p2p, NULL);
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p2p_set_wfd_dev_info(global->p2p, NULL);
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p2p_set_wfd_assoc_bssid(global->p2p, NULL);
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p2p_set_wfd_coupled_sink_info(global->p2p, NULL);
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return 0;
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}
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p2p_set_wfd_dev_info(global->p2p,
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global->wfd_subelem[WFD_SUBELEM_DEVICE_INFO]);
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p2p_set_wfd_assoc_bssid(
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global->p2p,
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global->wfd_subelem[WFD_SUBELEM_ASSOCIATED_BSSID]);
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p2p_set_wfd_coupled_sink_info(
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global->p2p, global->wfd_subelem[WFD_SUBELEM_COUPLED_SINK]);
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/*
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* WFD IE is included in number of management frames. Two different
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* sets of subelements are included depending on the frame:
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*
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* Beacon, (Re)Association Request, GO Negotiation Req/Resp/Conf,
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* Provision Discovery Req:
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* WFD Device Info
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* [Associated BSSID]
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* [Coupled Sink Info]
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*
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* Probe Request:
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* WFD Device Info
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* [Associated BSSID]
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* [Coupled Sink Info]
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* [WFD Extended Capability]
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*
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* Probe Response:
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* WFD Device Info
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* [Associated BSSID]
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* [Coupled Sink Info]
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* [WFD Extended Capability]
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* [WFD Session Info]
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*
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* (Re)Association Response, P2P Invitation Req/Resp,
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* Provision Discovery Resp:
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* WFD Device Info
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* [Associated BSSID]
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* [Coupled Sink Info]
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* [WFD Session Info]
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*/
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len = 0;
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if (global->wfd_subelem[WFD_SUBELEM_DEVICE_INFO])
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len += wpabuf_len(global->wfd_subelem[
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WFD_SUBELEM_DEVICE_INFO]);
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if (global->wfd_subelem[WFD_SUBELEM_ASSOCIATED_BSSID])
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len += wpabuf_len(global->wfd_subelem[
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WFD_SUBELEM_ASSOCIATED_BSSID]);
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if (global->wfd_subelem[WFD_SUBELEM_COUPLED_SINK])
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len += wpabuf_len(global->wfd_subelem[
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WFD_SUBELEM_COUPLED_SINK]);
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if (global->wfd_subelem[WFD_SUBELEM_SESSION_INFO])
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len += wpabuf_len(global->wfd_subelem[
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WFD_SUBELEM_SESSION_INFO]);
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if (global->wfd_subelem[WFD_SUBELEM_EXT_CAPAB])
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len += wpabuf_len(global->wfd_subelem[WFD_SUBELEM_EXT_CAPAB]);
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buf = wpabuf_alloc(len);
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if (buf == NULL)
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return -1;
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if (global->wfd_subelem[WFD_SUBELEM_DEVICE_INFO])
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wpabuf_put_buf(buf,
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global->wfd_subelem[WFD_SUBELEM_DEVICE_INFO]);
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if (global->wfd_subelem[WFD_SUBELEM_ASSOCIATED_BSSID])
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wpabuf_put_buf(buf, global->wfd_subelem[
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WFD_SUBELEM_ASSOCIATED_BSSID]);
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if (global->wfd_subelem[WFD_SUBELEM_COUPLED_SINK])
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wpabuf_put_buf(buf,
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global->wfd_subelem[WFD_SUBELEM_COUPLED_SINK]);
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ie = wifi_display_encaps(buf);
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wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Beacon", ie);
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p2p_set_wfd_ie_beacon(global->p2p, ie);
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ie = wifi_display_encaps(buf);
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wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for (Re)Association Request",
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ie);
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p2p_set_wfd_ie_assoc_req(global->p2p, ie);
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ie = wifi_display_encaps(buf);
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wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for GO Negotiation", ie);
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p2p_set_wfd_ie_go_neg(global->p2p, ie);
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ie = wifi_display_encaps(buf);
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wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Provision Discovery "
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"Request", ie);
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p2p_set_wfd_ie_prov_disc_req(global->p2p, ie);
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plen = buf->used;
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if (global->wfd_subelem[WFD_SUBELEM_EXT_CAPAB])
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wpabuf_put_buf(buf,
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global->wfd_subelem[WFD_SUBELEM_EXT_CAPAB]);
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ie = wifi_display_encaps(buf);
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wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Probe Request", ie);
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p2p_set_wfd_ie_probe_req(global->p2p, ie);
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if (global->wfd_subelem[WFD_SUBELEM_SESSION_INFO])
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wpabuf_put_buf(buf,
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global->wfd_subelem[WFD_SUBELEM_SESSION_INFO]);
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ie = wifi_display_encaps(buf);
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wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Probe Response", ie);
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p2p_set_wfd_ie_probe_resp(global->p2p, ie);
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/* Remove WFD Extended Capability from buffer */
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buf->used = plen;
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if (global->wfd_subelem[WFD_SUBELEM_SESSION_INFO])
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wpabuf_put_buf(buf,
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global->wfd_subelem[WFD_SUBELEM_SESSION_INFO]);
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ie = wifi_display_encaps(buf);
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wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for P2P Invitation", ie);
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p2p_set_wfd_ie_invitation(global->p2p, ie);
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ie = wifi_display_encaps(buf);
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wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Provision Discovery "
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"Response", ie);
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p2p_set_wfd_ie_prov_disc_resp(global->p2p, ie);
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wpabuf_free(buf);
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return 0;
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}
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void wifi_display_enable(struct wpa_global *global, int enabled)
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{
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wpa_printf(MSG_DEBUG, "WFD: Wi-Fi Display %s",
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enabled ? "enabled" : "disabled");
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global->wifi_display = enabled;
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wifi_display_update_wfd_ie(global);
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}
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int wifi_display_subelem_set(struct wpa_global *global, char *cmd)
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{
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char *pos;
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int subelem;
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size_t len;
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struct wpabuf *e;
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pos = os_strchr(cmd, ' ');
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if (pos == NULL)
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return -1;
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*pos++ = '\0';
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subelem = atoi(cmd);
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if (subelem < 0 || subelem >= MAX_WFD_SUBELEMS)
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return -1;
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len = os_strlen(pos);
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if (len & 1)
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return -1;
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len /= 2;
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if (len == 0) {
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/* Clear subelement */
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e = NULL;
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wpa_printf(MSG_DEBUG, "WFD: Clear subelement %d", subelem);
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} else {
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e = wpabuf_alloc(1 + len);
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if (e == NULL)
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return -1;
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wpabuf_put_u8(e, subelem);
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if (hexstr2bin(pos, wpabuf_put(e, len), len) < 0) {
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wpabuf_free(e);
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return -1;
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}
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wpa_printf(MSG_DEBUG, "WFD: Set subelement %d", subelem);
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}
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wpabuf_free(global->wfd_subelem[subelem]);
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global->wfd_subelem[subelem] = e;
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wifi_display_update_wfd_ie(global);
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return 0;
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}
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int wifi_display_subelem_get(struct wpa_global *global, char *cmd,
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char *buf, size_t buflen)
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{
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int subelem;
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subelem = atoi(cmd);
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if (subelem < 0 || subelem >= MAX_WFD_SUBELEMS)
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return -1;
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if (global->wfd_subelem[subelem] == NULL)
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return 0;
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return wpa_snprintf_hex(buf, buflen,
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wpabuf_head_u8(global->wfd_subelem[subelem]) +
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1,
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wpabuf_len(global->wfd_subelem[subelem]) - 1);
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}
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