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P2P: Run a scan before provision discovery in p2p_connect join 

This is needed to make sure we have fresh BSS information for the GO.
This commit is contained in:
Jouni Malinen 2010-06-26 16:20:57 -07:00 committed by Jouni Malinen
parent c381508d88
commit ef922c4a34
1 changed files with 96 additions and 16 deletions
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112
wpa_supplicant/p2p_supplicant.c
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@ -40,6 +40,7 @@ static struct wpa_supplicant *
wpas_p2p_get_group_iface(struct wpa_supplicant *wpa_s, int addr_allocated,
int go);
static int wpas_p2p_join_start(struct wpa_supplicant *wpa_s);
static void wpas_p2p_join_scan(void *eloop_ctx, void *timeout_ctx);
static int wpas_p2p_create_iface(struct wpa_supplicant *wpa_s);
@ -2141,6 +2142,7 @@ void wpas_p2p_deinit(struct wpa_supplicant *wpa_s)
wpa_s->pending_action_tx = NULL;
eloop_cancel_timeout(wpas_send_action_cb, wpa_s, NULL);
eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s, NULL);
eloop_cancel_timeout(wpas_p2p_join_scan, wpa_s, NULL);
wpa_s->p2p_long_listen = 0;
eloop_cancel_timeout(wpas_p2p_long_listen_timeout, wpa_s, NULL);
wpas_p2p_remove_pending_group_interface(wpa_s);
@ -2230,33 +2232,33 @@ static int wpas_p2p_auth_go_neg(struct wpa_supplicant *wpa_s,
}
static int wpas_p2p_join(struct wpa_supplicant *wpa_s, const u8 *iface_addr,
const u8 *dev_addr, enum p2p_wps_method wps_method)
static void wpas_p2p_scan_res_join(struct wpa_supplicant *wpa_s,
struct wpa_scan_results *scan_res)
{
struct wpa_bss *bss;
wpa_printf(MSG_DEBUG, "P2P: Request to join existing group (iface "
MACSTR " dev " MACSTR ")",
MAC2STR(iface_addr), MAC2STR(dev_addr));
eloop_cancel_timeout(wpas_p2p_join_scan, wpa_s, NULL);
os_memcpy(wpa_s->pending_join_iface_addr, iface_addr, ETH_ALEN);
os_memcpy(wpa_s->pending_join_dev_addr, dev_addr, ETH_ALEN);
wpa_s->pending_join_wps_method = wps_method;
if (wpa_s->global->p2p_disabled)
return;
/* Make sure we are not running find during connection establishment */
wpas_p2p_stop_find(wpa_s);
wpa_printf(MSG_DEBUG, "P2P: Scan results received (%d BSS) for join",
scan_res ? (int) scan_res->num : -1);
bss = wpa_bss_get_bssid(wpa_s, iface_addr);
if (scan_res)
wpas_p2p_scan_res_handler(wpa_s, scan_res);
bss = wpa_bss_get_bssid(wpa_s, wpa_s->pending_join_iface_addr);
if (bss) {
u16 method;
wpa_printf(MSG_DEBUG, "P2P: Send Provision Discovery Request "
"prior to joining an existing group (GO " MACSTR
" freq=%u MHz)",
MAC2STR(dev_addr), bss->freq);
MAC2STR(wpa_s->pending_join_dev_addr), bss->freq);
wpa_s->pending_pd_before_join = 1;
switch (wps_method) {
switch (wpa_s->pending_join_wps_method) {
case WPS_PIN_LABEL:
case WPS_PIN_DISPLAY:
method = WPS_CONFIG_KEYPAD;
@ -2272,7 +2274,8 @@ static int wpas_p2p_join(struct wpa_supplicant *wpa_s, const u8 *iface_addr,
break;
}
if (p2p_prov_disc_req(wpa_s->global->p2p, dev_addr, method, 1)
if (p2p_prov_disc_req(wpa_s->global->p2p,
wpa_s->pending_join_dev_addr, method, 1)
< 0) {
wpa_printf(MSG_DEBUG, "P2P: Failed to send Provision "
"Discovery Request before joining an "
@ -2285,7 +2288,7 @@ static int wpas_p2p_join(struct wpa_supplicant *wpa_s, const u8 *iface_addr,
* Actual join operation will be started from the Action frame
* TX status callback.
*/
return 0;
return;
}
wpa_printf(MSG_DEBUG, "P2P: Target BSS/GO not yet in BSS table - "
@ -2293,7 +2296,83 @@ static int wpas_p2p_join(struct wpa_supplicant *wpa_s, const u8 *iface_addr,
start:
/* Start join operation immediately */
return wpas_p2p_join_start(wpa_s);
wpas_p2p_join_start(wpa_s);
}
static void wpas_p2p_join_scan(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
int ret;
struct wpa_driver_scan_params params;
struct wpabuf *wps_ie, *ies;
os_memset(&params, 0, sizeof(params));
/* P2P Wildcard SSID */
params.num_ssids = 1;
params.ssids[0].ssid = (u8 *) P2P_WILDCARD_SSID;
params.ssids[0].ssid_len = P2P_WILDCARD_SSID_LEN;
wpa_s->wps->dev.p2p = 1;
wps_ie = wps_build_probe_req_ie(0, &wpa_s->wps->dev, wpa_s->wps->uuid,
WPS_REQ_ENROLLEE);
if (wps_ie == NULL) {
wpas_p2p_scan_res_join(wpa_s, NULL);
return;
}
ies = wpabuf_alloc(wpabuf_len(wps_ie) + 100);
if (ies == NULL) {
wpabuf_free(wps_ie);
wpas_p2p_scan_res_join(wpa_s, NULL);
return;
}
wpabuf_put_buf(ies, wps_ie);
wpabuf_free(wps_ie);
p2p_scan_ie(wpa_s->global->p2p, ies);
params.extra_ies = wpabuf_head(ies);
params.extra_ies_len = wpabuf_len(ies);
/*
* Run a scan to update BSS table and start Provision Discovery once
* the new scan results become available.
*/
wpa_s->scan_res_handler = wpas_p2p_scan_res_join;
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
ret = ieee80211_sta_req_scan(wpa_s, &params);
else
ret = wpa_drv_scan(wpa_s, &params);
wpabuf_free(ies);
if (ret) {
wpa_printf(MSG_DEBUG, "P2P: Failed to start scan for join - "
"try again later");
eloop_cancel_timeout(wpas_p2p_join_scan, wpa_s, NULL);
eloop_register_timeout(1, 0, wpas_p2p_join_scan, wpa_s, NULL);
}
}
static int wpas_p2p_join(struct wpa_supplicant *wpa_s, const u8 *iface_addr,
const u8 *dev_addr, enum p2p_wps_method wps_method)
{
wpa_printf(MSG_DEBUG, "P2P: Request to join existing group (iface "
MACSTR " dev " MACSTR ")",
MAC2STR(iface_addr), MAC2STR(dev_addr));
os_memcpy(wpa_s->pending_join_iface_addr, iface_addr, ETH_ALEN);
os_memcpy(wpa_s->pending_join_dev_addr, dev_addr, ETH_ALEN);
wpa_s->pending_join_wps_method = wps_method;
/* Make sure we are not running find during connection establishment */
wpas_p2p_stop_find(wpa_s);
wpas_p2p_join_scan(wpa_s, NULL);
return 0;
}
@ -2818,6 +2897,7 @@ int wpas_p2p_find(struct wpa_supplicant *wpa_s, unsigned int timeout,
void wpas_p2p_stop_find(struct wpa_supplicant *wpa_s)
{
wpa_s->p2p_long_listen = 0;
eloop_cancel_timeout(wpas_p2p_join_scan, wpa_s, NULL);
p2p_stop_find(wpa_s->global->p2p);