mirror of https://gitee.com/openkylin/wpa.git
432 lines
10 KiB
C
432 lines
10 KiB
C
/*
|
|
* wpa_supplicant - Wi-Fi Display
|
|
* Copyright (c) 2011, Atheros Communications, Inc.
|
|
* Copyright (c) 2011-2012, Qualcomm Atheros, Inc.
|
|
*
|
|
* This software may be distributed under the terms of the BSD license.
|
|
* See README for more details.
|
|
*/
|
|
|
|
#include "includes.h"
|
|
|
|
#include "common.h"
|
|
#include "p2p/p2p.h"
|
|
#include "common/ieee802_11_defs.h"
|
|
#include "wpa_supplicant_i.h"
|
|
#include "wifi_display.h"
|
|
|
|
|
|
#define WIFI_DISPLAY_SUBELEM_HEADER_LEN 3
|
|
|
|
|
|
int wifi_display_init(struct wpa_global *global)
|
|
{
|
|
global->wifi_display = 1;
|
|
return 0;
|
|
}
|
|
|
|
|
|
void wifi_display_deinit(struct wpa_global *global)
|
|
{
|
|
int i;
|
|
for (i = 0; i < MAX_WFD_SUBELEMS; i++) {
|
|
wpabuf_free(global->wfd_subelem[i]);
|
|
global->wfd_subelem[i] = NULL;
|
|
}
|
|
}
|
|
|
|
|
|
struct wpabuf * wifi_display_get_wfd_ie(struct wpa_global *global)
|
|
{
|
|
struct wpabuf *ie;
|
|
size_t len;
|
|
int i;
|
|
|
|
if (global->p2p == NULL)
|
|
return NULL;
|
|
|
|
len = 0;
|
|
for (i = 0; i < MAX_WFD_SUBELEMS; i++) {
|
|
if (global->wfd_subelem[i])
|
|
len += wpabuf_len(global->wfd_subelem[i]);
|
|
}
|
|
|
|
ie = wpabuf_alloc(len);
|
|
if (ie == NULL)
|
|
return NULL;
|
|
|
|
for (i = 0; i < MAX_WFD_SUBELEMS; i++) {
|
|
if (global->wfd_subelem[i])
|
|
wpabuf_put_buf(ie, global->wfd_subelem[i]);
|
|
}
|
|
|
|
return ie;
|
|
}
|
|
|
|
|
|
static int wifi_display_update_wfd_ie(struct wpa_global *global)
|
|
{
|
|
struct wpabuf *ie, *buf;
|
|
size_t len, plen;
|
|
|
|
if (global->p2p == NULL)
|
|
return 0;
|
|
|
|
wpa_printf(MSG_DEBUG, "WFD: Update WFD IE");
|
|
|
|
if (!global->wifi_display) {
|
|
wpa_printf(MSG_DEBUG, "WFD: Wi-Fi Display disabled - do not "
|
|
"include WFD IE");
|
|
p2p_set_wfd_ie_beacon(global->p2p, NULL);
|
|
p2p_set_wfd_ie_probe_req(global->p2p, NULL);
|
|
p2p_set_wfd_ie_probe_resp(global->p2p, NULL);
|
|
p2p_set_wfd_ie_assoc_req(global->p2p, NULL);
|
|
p2p_set_wfd_ie_invitation(global->p2p, NULL);
|
|
p2p_set_wfd_ie_prov_disc_req(global->p2p, NULL);
|
|
p2p_set_wfd_ie_prov_disc_resp(global->p2p, NULL);
|
|
p2p_set_wfd_ie_go_neg(global->p2p, NULL);
|
|
p2p_set_wfd_dev_info(global->p2p, NULL);
|
|
p2p_set_wfd_r2_dev_info(global->p2p, NULL);
|
|
p2p_set_wfd_assoc_bssid(global->p2p, NULL);
|
|
p2p_set_wfd_coupled_sink_info(global->p2p, NULL);
|
|
return 0;
|
|
}
|
|
|
|
p2p_set_wfd_dev_info(global->p2p,
|
|
global->wfd_subelem[WFD_SUBELEM_DEVICE_INFO]);
|
|
p2p_set_wfd_r2_dev_info(
|
|
global->p2p, global->wfd_subelem[WFD_SUBELEM_R2_DEVICE_INFO]);
|
|
p2p_set_wfd_assoc_bssid(
|
|
global->p2p,
|
|
global->wfd_subelem[WFD_SUBELEM_ASSOCIATED_BSSID]);
|
|
p2p_set_wfd_coupled_sink_info(
|
|
global->p2p, global->wfd_subelem[WFD_SUBELEM_COUPLED_SINK]);
|
|
|
|
/*
|
|
* WFD IE is included in number of management frames. Two different
|
|
* sets of subelements are included depending on the frame:
|
|
*
|
|
* Beacon, (Re)Association Request, GO Negotiation Req/Resp/Conf,
|
|
* Provision Discovery Req:
|
|
* WFD Device Info
|
|
* [Associated BSSID]
|
|
* [Coupled Sink Info]
|
|
*
|
|
* Probe Request:
|
|
* WFD Device Info
|
|
* [Associated BSSID]
|
|
* [Coupled Sink Info]
|
|
* [WFD Extended Capability]
|
|
*
|
|
* Probe Response:
|
|
* WFD Device Info
|
|
* [Associated BSSID]
|
|
* [Coupled Sink Info]
|
|
* [WFD Extended Capability]
|
|
* [WFD Session Info]
|
|
*
|
|
* (Re)Association Response, P2P Invitation Req/Resp,
|
|
* Provision Discovery Resp:
|
|
* WFD Device Info
|
|
* [Associated BSSID]
|
|
* [Coupled Sink Info]
|
|
* [WFD Session Info]
|
|
*/
|
|
len = 0;
|
|
if (global->wfd_subelem[WFD_SUBELEM_DEVICE_INFO])
|
|
len += wpabuf_len(global->wfd_subelem[
|
|
WFD_SUBELEM_DEVICE_INFO]);
|
|
|
|
if (global->wfd_subelem[WFD_SUBELEM_R2_DEVICE_INFO])
|
|
len += wpabuf_len(global->wfd_subelem[
|
|
WFD_SUBELEM_R2_DEVICE_INFO]);
|
|
|
|
if (global->wfd_subelem[WFD_SUBELEM_ASSOCIATED_BSSID])
|
|
len += wpabuf_len(global->wfd_subelem[
|
|
WFD_SUBELEM_ASSOCIATED_BSSID]);
|
|
if (global->wfd_subelem[WFD_SUBELEM_COUPLED_SINK])
|
|
len += wpabuf_len(global->wfd_subelem[
|
|
WFD_SUBELEM_COUPLED_SINK]);
|
|
if (global->wfd_subelem[WFD_SUBELEM_SESSION_INFO])
|
|
len += wpabuf_len(global->wfd_subelem[
|
|
WFD_SUBELEM_SESSION_INFO]);
|
|
if (global->wfd_subelem[WFD_SUBELEM_EXT_CAPAB])
|
|
len += wpabuf_len(global->wfd_subelem[WFD_SUBELEM_EXT_CAPAB]);
|
|
buf = wpabuf_alloc(len);
|
|
if (buf == NULL)
|
|
return -1;
|
|
|
|
if (global->wfd_subelem[WFD_SUBELEM_DEVICE_INFO])
|
|
wpabuf_put_buf(buf,
|
|
global->wfd_subelem[WFD_SUBELEM_DEVICE_INFO]);
|
|
|
|
if (global->wfd_subelem[WFD_SUBELEM_R2_DEVICE_INFO])
|
|
wpabuf_put_buf(buf,
|
|
global->wfd_subelem[WFD_SUBELEM_R2_DEVICE_INFO]);
|
|
|
|
if (global->wfd_subelem[WFD_SUBELEM_ASSOCIATED_BSSID])
|
|
wpabuf_put_buf(buf, global->wfd_subelem[
|
|
WFD_SUBELEM_ASSOCIATED_BSSID]);
|
|
if (global->wfd_subelem[WFD_SUBELEM_COUPLED_SINK])
|
|
wpabuf_put_buf(buf,
|
|
global->wfd_subelem[WFD_SUBELEM_COUPLED_SINK]);
|
|
|
|
ie = wifi_display_encaps(buf);
|
|
wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Beacon", ie);
|
|
p2p_set_wfd_ie_beacon(global->p2p, ie);
|
|
|
|
ie = wifi_display_encaps(buf);
|
|
wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for (Re)Association Request",
|
|
ie);
|
|
p2p_set_wfd_ie_assoc_req(global->p2p, ie);
|
|
|
|
ie = wifi_display_encaps(buf);
|
|
wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for GO Negotiation", ie);
|
|
p2p_set_wfd_ie_go_neg(global->p2p, ie);
|
|
|
|
ie = wifi_display_encaps(buf);
|
|
wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Provision Discovery "
|
|
"Request", ie);
|
|
p2p_set_wfd_ie_prov_disc_req(global->p2p, ie);
|
|
|
|
plen = buf->used;
|
|
if (global->wfd_subelem[WFD_SUBELEM_EXT_CAPAB])
|
|
wpabuf_put_buf(buf,
|
|
global->wfd_subelem[WFD_SUBELEM_EXT_CAPAB]);
|
|
|
|
ie = wifi_display_encaps(buf);
|
|
wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Probe Request", ie);
|
|
p2p_set_wfd_ie_probe_req(global->p2p, ie);
|
|
|
|
if (global->wfd_subelem[WFD_SUBELEM_SESSION_INFO])
|
|
wpabuf_put_buf(buf,
|
|
global->wfd_subelem[WFD_SUBELEM_SESSION_INFO]);
|
|
ie = wifi_display_encaps(buf);
|
|
wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Probe Response", ie);
|
|
p2p_set_wfd_ie_probe_resp(global->p2p, ie);
|
|
|
|
/* Remove WFD Extended Capability from buffer */
|
|
buf->used = plen;
|
|
if (global->wfd_subelem[WFD_SUBELEM_SESSION_INFO])
|
|
wpabuf_put_buf(buf,
|
|
global->wfd_subelem[WFD_SUBELEM_SESSION_INFO]);
|
|
|
|
ie = wifi_display_encaps(buf);
|
|
wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for P2P Invitation", ie);
|
|
p2p_set_wfd_ie_invitation(global->p2p, ie);
|
|
|
|
ie = wifi_display_encaps(buf);
|
|
wpa_hexdump_buf(MSG_DEBUG, "WFD: WFD IE for Provision Discovery "
|
|
"Response", ie);
|
|
p2p_set_wfd_ie_prov_disc_resp(global->p2p, ie);
|
|
|
|
wpabuf_free(buf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
void wifi_display_enable(struct wpa_global *global, int enabled)
|
|
{
|
|
wpa_printf(MSG_DEBUG, "WFD: Wi-Fi Display %s",
|
|
enabled ? "enabled" : "disabled");
|
|
global->wifi_display = enabled;
|
|
wifi_display_update_wfd_ie(global);
|
|
}
|
|
|
|
|
|
int wifi_display_subelem_set(struct wpa_global *global, char *cmd)
|
|
{
|
|
char *pos;
|
|
int subelem;
|
|
size_t len;
|
|
struct wpabuf *e;
|
|
|
|
pos = os_strchr(cmd, ' ');
|
|
if (pos == NULL)
|
|
return -1;
|
|
*pos++ = '\0';
|
|
|
|
len = os_strlen(pos);
|
|
if (len & 1)
|
|
return -1;
|
|
len /= 2;
|
|
|
|
if (os_strcmp(cmd, "all") == 0) {
|
|
int res;
|
|
|
|
e = wpabuf_alloc(len);
|
|
if (e == NULL)
|
|
return -1;
|
|
if (hexstr2bin(pos, wpabuf_put(e, len), len) < 0) {
|
|
wpabuf_free(e);
|
|
return -1;
|
|
}
|
|
res = wifi_display_subelem_set_from_ies(global, e);
|
|
wpabuf_free(e);
|
|
return res;
|
|
}
|
|
|
|
subelem = atoi(cmd);
|
|
if (subelem < 0 || subelem >= MAX_WFD_SUBELEMS)
|
|
return -1;
|
|
|
|
if (len == 0) {
|
|
/* Clear subelement */
|
|
e = NULL;
|
|
wpa_printf(MSG_DEBUG, "WFD: Clear subelement %d", subelem);
|
|
} else {
|
|
e = wpabuf_alloc(1 + len);
|
|
if (e == NULL)
|
|
return -1;
|
|
wpabuf_put_u8(e, subelem);
|
|
if (hexstr2bin(pos, wpabuf_put(e, len), len) < 0) {
|
|
wpabuf_free(e);
|
|
return -1;
|
|
}
|
|
wpa_printf(MSG_DEBUG, "WFD: Set subelement %d", subelem);
|
|
}
|
|
|
|
wpabuf_free(global->wfd_subelem[subelem]);
|
|
global->wfd_subelem[subelem] = e;
|
|
wifi_display_update_wfd_ie(global);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int wifi_display_subelem_set_from_ies(struct wpa_global *global,
|
|
struct wpabuf *ie)
|
|
{
|
|
int subelements[MAX_WFD_SUBELEMS] = {};
|
|
const u8 *pos, *end;
|
|
unsigned int len, subelem;
|
|
struct wpabuf *e;
|
|
|
|
wpa_printf(MSG_DEBUG, "WFD IEs set: %p - %lu",
|
|
ie, ie ? (unsigned long) wpabuf_len(ie) : 0);
|
|
|
|
if (ie == NULL || wpabuf_len(ie) < 6)
|
|
return -1;
|
|
|
|
pos = wpabuf_head(ie);
|
|
end = pos + wpabuf_len(ie);
|
|
|
|
while (end > pos) {
|
|
if (pos + 3 > end)
|
|
break;
|
|
|
|
len = WPA_GET_BE16(pos + 1) + 3;
|
|
|
|
wpa_printf(MSG_DEBUG, "WFD Sub-Element ID %d - len %d",
|
|
*pos, len - 3);
|
|
|
|
if (len > (unsigned int) (end - pos))
|
|
break;
|
|
|
|
subelem = *pos;
|
|
if (subelem < MAX_WFD_SUBELEMS && subelements[subelem] == 0) {
|
|
e = wpabuf_alloc_copy(pos, len);
|
|
if (e == NULL)
|
|
return -1;
|
|
|
|
wpabuf_free(global->wfd_subelem[subelem]);
|
|
global->wfd_subelem[subelem] = e;
|
|
subelements[subelem] = 1;
|
|
}
|
|
|
|
pos += len;
|
|
}
|
|
|
|
for (subelem = 0; subelem < MAX_WFD_SUBELEMS; subelem++) {
|
|
if (subelements[subelem] == 0) {
|
|
wpabuf_free(global->wfd_subelem[subelem]);
|
|
global->wfd_subelem[subelem] = NULL;
|
|
}
|
|
}
|
|
|
|
return wifi_display_update_wfd_ie(global);
|
|
}
|
|
|
|
|
|
int wifi_display_subelem_get(struct wpa_global *global, char *cmd,
|
|
char *buf, size_t buflen)
|
|
{
|
|
int subelem;
|
|
|
|
if (os_strcmp(cmd, "all") == 0) {
|
|
struct wpabuf *ie;
|
|
int res;
|
|
|
|
ie = wifi_display_get_wfd_ie(global);
|
|
if (ie == NULL)
|
|
return 0;
|
|
res = wpa_snprintf_hex(buf, buflen, wpabuf_head(ie),
|
|
wpabuf_len(ie));
|
|
wpabuf_free(ie);
|
|
return res;
|
|
}
|
|
|
|
subelem = atoi(cmd);
|
|
if (subelem < 0 || subelem >= MAX_WFD_SUBELEMS)
|
|
return -1;
|
|
|
|
if (global->wfd_subelem[subelem] == NULL)
|
|
return 0;
|
|
|
|
return wpa_snprintf_hex(buf, buflen,
|
|
wpabuf_head_u8(global->wfd_subelem[subelem]) +
|
|
1,
|
|
wpabuf_len(global->wfd_subelem[subelem]) - 1);
|
|
}
|
|
|
|
|
|
char * wifi_display_subelem_hex(const struct wpabuf *wfd_subelems, u8 id)
|
|
{
|
|
char *subelem = NULL;
|
|
const u8 *buf;
|
|
size_t buflen;
|
|
size_t i = 0;
|
|
u16 elen;
|
|
|
|
if (!wfd_subelems)
|
|
return NULL;
|
|
|
|
buf = wpabuf_head_u8(wfd_subelems);
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
buflen = wpabuf_len(wfd_subelems);
|
|
|
|
while (i + WIFI_DISPLAY_SUBELEM_HEADER_LEN < buflen) {
|
|
elen = WPA_GET_BE16(buf + i + 1);
|
|
if (i + WIFI_DISPLAY_SUBELEM_HEADER_LEN + elen > buflen)
|
|
break; /* truncated subelement */
|
|
|
|
if (buf[i] == id) {
|
|
/*
|
|
* Limit explicitly to an arbitrary length to avoid
|
|
* unnecessarily large allocations. In practice, this
|
|
* is limited to maximum frame length anyway, so the
|
|
* maximum memory allocation here is not really that
|
|
* large. Anyway, the Wi-Fi Display subelements that
|
|
* are fetched with this function are even shorter.
|
|
*/
|
|
if (elen > 1000)
|
|
break;
|
|
subelem = os_zalloc(2 * elen + 1);
|
|
if (!subelem)
|
|
return NULL;
|
|
wpa_snprintf_hex(subelem, 2 * elen + 1,
|
|
buf + i +
|
|
WIFI_DISPLAY_SUBELEM_HEADER_LEN,
|
|
elen);
|
|
break;
|
|
}
|
|
|
|
i += elen + WIFI_DISPLAY_SUBELEM_HEADER_LEN;
|
|
}
|
|
|
|
return subelem;
|
|
}
|