static int wpa_supplicant_ctrl_iface_scan_results(
struct wpa_supplicant *wpa_s, char *buf, size_t buflen)
{
char *pos, *end;
struct wpa_scan_res *res;
int ret;
size_t i;
if (wpa_s->scan_res == NULL &&
wpa_supplicant_get_scan_results(wpa_s) < 0)
return 0;
pos = buf;
end = buf + buflen;
ret = os_snprintf(pos, end - pos, "bssid / frequency / signal level / "
"flags / ssid\n");
if (ret < 0 || ret >= end - pos)
return pos - buf;
pos += ret;
for (i = 0; i < wpa_s->scan_res->num; i++) {
res = wpa_s->scan_res->res[i];
ret = wpa_supplicant_ctrl_iface_scan_result(res, pos,
end - pos);
if (ret < 0 || ret >= end - pos)
return pos - buf;
pos += ret;
}
return pos - buf;
}
/**
* wpas_dbus_iface_scan_results - Get the results of a recent scan request
* @message: Pointer to incoming dbus message
* @wpa_s: wpa_supplicant structure for a network interface
* Returns: a dbus message containing a dbus array of objects paths, or returns
* a dbus error message if not scan results could be found
*
* Handler function for "scanResults" method call of a network device. Returns
* a dbus message containing the object paths of wireless networks found.
*/
DBusMessage * wpas_dbus_iface_scan_results(DBusMessage *message,
struct wpa_supplicant *wpa_s)
{
DBusMessage *reply = NULL;
DBusMessageIter iter;
DBusMessageIter sub_iter;
size_t i;
/* Ensure we've actually got scan results to return */
if (wpa_s->scan_res == NULL &&
wpa_supplicant_get_scan_results(wpa_s) < 0) {
reply = dbus_message_new_error(message, WPAS_ERROR_SCAN_ERROR,
"An error ocurred getting scan "
"results.");
goto out;
}
/* Create and initialize the return message */
reply = dbus_message_new_method_return(message);
dbus_message_iter_init_append(reply, &iter);
dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY,
DBUS_TYPE_OBJECT_PATH_AS_STRING,
&sub_iter);
/* Loop through scan results and append each result's object path */
for (i = 0; i < wpa_s->scan_res->num; i++) {
struct wpa_scan_res *res = wpa_s->scan_res->res[i];
char *path;
path = os_zalloc(WPAS_DBUS_OBJECT_PATH_MAX);
if (path == NULL) {
perror("wpas_dbus_iface_scan_results[dbus]: out of "
"memory.");
wpa_printf(MSG_ERROR, "dbus control interface: not "
"enough memory to send scan results "
"signal.");
break;
}
/* Construct the object path for this network. Note that ':'
* is not a valid character in dbus object paths.
*/
snprintf(path, WPAS_DBUS_OBJECT_PATH_MAX,
"%s/" WPAS_DBUS_BSSIDS_PART "/"
WPAS_DBUS_BSSID_FORMAT,
wpa_supplicant_get_dbus_path(wpa_s),
MAC2STR(res->bssid));
dbus_message_iter_append_basic(&sub_iter,
DBUS_TYPE_OBJECT_PATH, &path);
free(path);
}
dbus_message_iter_close_container(&iter, &sub_iter);
out:
return reply;
}
int wpa_supplicant_update_scan_results(struct wpa_supplicant *wpa_s)
{
struct wpa_scan_results *scan_res;
scan_res = wpa_supplicant_get_scan_results(wpa_s, NULL, 0);
if (scan_res == NULL)
return -1;
wpa_scan_results_free(scan_res);
return 0;
}
static struct wpa_ssid * wpas_wps_add_network(struct wpa_supplicant *wpa_s,
int registrar, const u8 *bssid)
{
struct wpa_ssid *ssid;
ssid = wpa_config_add_network(wpa_s->conf);
if (ssid == NULL)
return NULL;
wpa_config_set_network_defaults(ssid);
if (wpa_config_set(ssid, "key_mgmt", "WPS", 0) < 0 ||
wpa_config_set(ssid, "eap", "WSC", 0) < 0 ||
wpa_config_set(ssid, "identity", registrar ?
"\"" WSC_ID_REGISTRAR "\"" :
"\"" WSC_ID_ENROLLEE "\"", 0) < 0) {
wpa_config_remove_network(wpa_s->conf, ssid->id);
return NULL;
}
if (bssid) {
size_t i;
struct wpa_scan_res *res;
os_memcpy(ssid->bssid, bssid, ETH_ALEN);
ssid->bssid_set = 1;
/* Try to get SSID from scan results */
if (wpa_s->scan_res == NULL &&
wpa_supplicant_get_scan_results(wpa_s) < 0)
return ssid; /* Could not find any scan results */
for (i = 0; i < wpa_s->scan_res->num; i++) {
const u8 *ie;
res = wpa_s->scan_res->res[i];
if (os_memcmp(bssid, res->bssid, ETH_ALEN) != 0)
continue;
ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
if (ie == NULL)
break;
os_free(ssid->ssid);
ssid->ssid = os_malloc(ie[1]);
if (ssid->ssid == NULL)
break;
os_memcpy(ssid->ssid, ie + 2, ie[1]);
ssid->ssid_len = ie[1];
break;
}
}
return ssid;
}
static int wpa_supplicant_get_beacon_ie(void *ctx)
{
struct wpa_supplicant *wpa_s = ctx;
if (wpa_get_beacon_ie(wpa_s) == 0) {
return 0;
}
/* No WPA/RSN IE found in the cached scan results. Try to get updated
* scan results from the driver. */
if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
return -1;
}
return wpa_get_beacon_ie(wpa_s);
}
/**
* wpas_dispatch_bssid_method - dispatch messages for scanned networks
* @message: the incoming dbus message
* @wpa_s: a network interface's data
* @bssid: bssid of the scanned network we're interested in
* Returns: a reply dbus message, or a dbus error message
*
* This function dispatches all incoming dbus messages for scanned networks.
*/
static DBusMessage * wpas_dispatch_bssid_method(DBusMessage *message,
struct wpa_supplicant *wpa_s,
const char *bssid)
{
DBusMessage *reply = NULL;
const char *method = dbus_message_get_member(message);
struct wpa_scan_res *res = NULL;
size_t i;
/* Ensure we actually have scan data */
if (wpa_s->scan_res == NULL &&
wpa_supplicant_get_scan_results(wpa_s) < 0) {
reply = wpas_dbus_new_invalid_bssid_error(message);
goto out;
}
/* Find the bssid's scan data */
for (i = 0; i < wpa_s->scan_res->num; i++) {
struct wpa_scan_res *search_res = wpa_s->scan_res->res[i];
char mac_str[18];
memset(mac_str, 0, sizeof(mac_str));
snprintf(mac_str, sizeof(mac_str) - 1, WPAS_DBUS_BSSID_FORMAT,
MAC2STR(search_res->bssid));
if (!strcmp(bssid, mac_str)) {
res = search_res;
break;
}
}
if (!res) {
reply = wpas_dbus_new_invalid_bssid_error(message);
goto out;
}
/* Dispatch the method call against the scanned bssid */
if (!strcmp(method, "properties"))
reply = wpas_dbus_bssid_properties(message, wpa_s, res);
out:
return reply;
}
static int wpa_supplicant_ctrl_iface_scan_results(
struct wpa_supplicant *wpa_s, char *buf, size_t buflen)
{
char *pos, *end, *retpos;
struct wpa_scan_result *res;
int i, ret;
if (wpa_s->scan_results == NULL &&
wpa_supplicant_get_scan_results(wpa_s) < 0)
return 0;
if (wpa_s->scan_results == NULL)
return 0;
pos = buf;
end = buf + buflen;
ret = os_snprintf(pos, end - pos, "bssid / frequency / signal level / "
"flags / ssid\n");
if (ret < 0 || ret >= end - pos)
return pos - buf;
pos += ret;
for (i = 0; i < wpa_s->num_scan_results; i++) {
retpos = pos;
res = &wpa_s->scan_results[i];
ret = os_snprintf(pos, end - pos, MACSTR "\t%d\t%d\t",
MAC2STR(res->bssid), res->freq, res->level);
if (ret < 0 || ret >= end - pos)
return retpos - buf;
pos += ret;
if (res->wpa_ie_len) {
pos = wpa_supplicant_ie_txt(pos, end, "WPA",
res->wpa_ie,
res->wpa_ie_len);
}
if (res->rsn_ie_len) {
pos = wpa_supplicant_ie_txt(pos, end, "WPA2",
res->rsn_ie,
res->rsn_ie_len);
}
if (!res->wpa_ie_len && !res->rsn_ie_len &&
res->caps & IEEE80211_CAP_PRIVACY) {
ret = os_snprintf(pos, end - pos, "[WEP]");
if (ret < 0 || ret >= end - pos)
return retpos - buf;
pos += ret;
}
if (res->caps & IEEE80211_CAP_IBSS) {
ret = os_snprintf(pos, end - pos, "[IBSS]");
if (ret < 0 || ret >= end - pos)
return retpos - buf;
pos += ret;
}
if (!res->wpa_ie_len && !res->rsn_ie_len) {
ret = os_snprintf(pos, end - pos, "\t");
if (ret < 0 || ret >= end - pos)
return retpos - buf;
pos += ret;
}
ret = os_snprintf(pos, end - pos, "\t%s",
wpa_ssid_txt(res->ssid, res->ssid_len));
if (ret < 0 || ret >= end - pos)
return retpos - buf;
pos += ret;
ret = os_snprintf(pos, end - pos, "\n");
if (ret < 0 || ret >= end - pos)
return retpos - buf;
pos += ret;
}
return pos - buf;
}
static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
{
int prio, timeout;
struct wpa_scan_res *selected = NULL;
struct wpa_ssid *ssid = NULL;
wpa_supplicant_notify_scanning(wpa_s, 0);
if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
if (wpa_s->conf->ap_scan == 2)
return;
wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
"scanning again");
timeout = 1;
goto req_scan;
}
/*
* Don't post the results if this was the initial cached
* and there were no results.
*/
if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
wpa_s->scan_res->num == 0) {
wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
"empty - not posting");
} else {
wpa_printf(MSG_DEBUG, "New scan results available");
wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
wpa_supplicant_dbus_notify_scan_results(wpa_s);
wpas_wps_notify_scan_results(wpa_s);
}
if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s)))
return;
if (wpa_s->disconnected) {
wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
return;
}
while (selected == NULL) {
for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
selected = wpa_supplicant_select_bss(
wpa_s, wpa_s->conf->pssid[prio], &ssid);
if (selected)
break;
}
if (selected == NULL && wpa_s->blacklist) {
wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
"and try again");
wpa_blacklist_clear(wpa_s);
wpa_s->blacklist_cleared++;
} else if (selected == NULL) {
break;
}
}
if (selected) {
if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
"PBC session overlap");
timeout = 10;
goto req_scan;
}
/* Do not trigger new association unless the BSSID has changed
* or if reassociation is requested. If we are in process of
* associating with the selected BSSID, do not trigger new
* attempt. */
if (wpa_s->reassociate ||
(os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
(wpa_s->wpa_state != WPA_ASSOCIATING ||
os_memcmp(selected->bssid, wpa_s->pending_bssid,
ETH_ALEN) != 0))) {
if (wpa_supplicant_scard_init(wpa_s, ssid)) {
wpa_supplicant_req_scan(wpa_s, 10, 0);
return;
}
wpa_supplicant_associate(wpa_s, selected, ssid);
} else {
wpa_printf(MSG_DEBUG, "Already associated with the "
"selected AP.");
}
rsn_preauth_scan_results(wpa_s->wpa, wpa_s->scan_res);
} else {
wpa_printf(MSG_DEBUG, "No suitable AP found.");
timeout = 5;
goto req_scan;
}
return;
req_scan:
if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
/*
* Quick recovery if the initial scan results were not
* complete when fetched before the first scan request.
*/
wpa_s->scan_res_tried++;
timeout = 0;
} else if (!wpa_supplicant_enabled_networks(wpa_s->conf)) {
/*
* No networks are enabled; short-circuit request so
* we don't wait timeout seconds before transitioning
* to INACTIVE state.
*/
wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
return;
}
wpa_supplicant_req_scan(wpa_s, timeout, 0);
}
static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
struct wpa_bss *selected;
struct wpa_ssid *ssid = NULL;
struct wpa_scan_results *scan_res;
int ap = 0;
#ifdef CONFIG_AP
if (wpa_s->ap_iface)
ap = 1;
#endif /* CONFIG_AP */
wpa_supplicant_notify_scanning(wpa_s, 0);
scan_res = wpa_supplicant_get_scan_results(wpa_s,
data ? &data->scan_info :
NULL, 1);
if (scan_res == NULL) {
if (wpa_s->conf->ap_scan == 2 || ap)
return;
wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
"scanning again");
wpa_supplicant_req_new_scan(wpa_s, 1, 0);
return;
}
if (wpa_s->scan_res_handler) {
wpa_s->scan_res_handler(wpa_s, scan_res);
wpa_s->scan_res_handler = NULL;
wpa_scan_results_free(scan_res);
return;
}
if (ap) {
wpa_printf(MSG_DEBUG, "Ignore scan results in AP mode");
wpa_scan_results_free(scan_res);
return;
}
wpa_printf(MSG_DEBUG, "New scan results available");
wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
wpas_notify_scan_results(wpa_s);
wpas_notify_scan_done(wpa_s, 1);
if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s))) {
wpa_scan_results_free(scan_res);
return;
}
if (wpa_s->disconnected) {
wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
wpa_scan_results_free(scan_res);
return;
}
wpa_supplicant_rsn_preauth_scan_results(wpa_s, scan_res);
selected = wpa_supplicant_pick_network(wpa_s, scan_res, &ssid);
if (selected) {
int skip;
skip = !wpa_supplicant_need_to_roam(wpa_s, selected, ssid,
scan_res);
wpa_scan_results_free(scan_res);
if (skip)
return;
wpa_supplicant_connect(wpa_s, selected, ssid);
} else {
wpa_scan_results_free(scan_res);
wpa_printf(MSG_DEBUG, "No suitable network found");
ssid = wpa_supplicant_pick_new_network(wpa_s);
if (ssid) {
wpa_printf(MSG_DEBUG, "Setup a new network");
wpa_supplicant_associate(wpa_s, NULL, ssid);
} else {
int timeout_sec = 5;
int timeout_usec = 0;
#ifdef CONFIG_P2P
if (wpa_s->p2p_in_provisioning) {
/*
* Use shorter wait during P2P Provisioning
* state to speed up group formation.
*/
timeout_sec = 0;
timeout_usec = 250000;
}
#endif /* CONFIG_P2P */
wpa_supplicant_req_new_scan(wpa_s, timeout_sec,
timeout_usec);
}
}
}
static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
union wpa_event_data *data)
{
//struct wpa_bss *selected;
//struct wpa_ssid *ssid = NULL;
struct wpa_scan_results *scan_res;
wpa_supplicant_notify_scanning(wpa_s, 0);
scan_res = wpa_supplicant_get_scan_results(wpa_s,
data ? &data->scan_info :
NULL, 1);
ros_scan_completed(wpa_s, scan_res);
if (scan_res == NULL) {
if (wpa_s->conf->ap_scan == 2)
return;
wpa_printf(MSG_DEBUG, "Failed to get scan results - don't bother try "
"scanning again");
//wpa_supplicant_req_new_scan(wpa_s, 1, 0);
return;
}
if (wpa_s->scan_res_handler) {
wpa_s->scan_res_handler(wpa_s, scan_res);
wpa_s->scan_res_handler = NULL;
wpa_scan_results_free(scan_res);
return;
}
/*
* Don't post the results if this was the initial cached
* and there were no results.
*/
if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
scan_res->num == 0) {
wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
"empty - not posting");
} else {
wpa_printf(MSG_DEBUG, "New scan results available");
wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
wpas_notify_scan_results(wpa_s);
}
wpas_notify_scan_done(wpa_s, 1);
if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s))) {
wpa_scan_results_free(scan_res);
return;
}
if (wpa_s->disconnected) {
wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
wpa_scan_results_free(scan_res);
return;
}
if (bgscan_notify_scan(wpa_s) == 1) {
wpa_scan_results_free(scan_res);
return;
}
wpa_supplicant_rsn_preauth_scan_results(wpa_s, scan_res);
/*selected = wpa_supplicant_pick_network(wpa_s, scan_res, &ssid);
if (selected) {
int skip;
wpa_s->more_bss_to_try = 1;
skip = !wpa_supplicant_need_to_roam(wpa_s, selected, ssid,
scan_res);
wpa_scan_results_free(scan_res);
if (skip)
return;
wpa_supplicant_connect(wpa_s, selected, ssid);
} else {
wpa_s->more_bss_to_try = 0;
wpa_scan_results_free(scan_res);
wpa_printf(MSG_DEBUG, "No suitable network found");
ssid = wpa_supplicant_pick_new_network(wpa_s);
if (ssid) {
wpa_printf(MSG_DEBUG, "Setup a new network");
wpa_supplicant_associate(wpa_s, NULL, ssid);
} else {
int timeout_sec = 1;
int timeout_usec = 0;
wpa_supplicant_req_new_scan(wpa_s, timeout_sec,
timeout_usec);
}
} */
}
static void wpas_wps_security_workaround(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid,
const struct wps_credential *cred)
{
struct wpa_driver_capa capa;
size_t i;
struct wpa_scan_res *bss;
const u8 *ie;
struct wpa_ie_data adv;
int wpa2 = 0, ccmp = 0;
/*
* Many existing WPS APs do not know how to negotiate WPA2 or CCMP in
* case they are configured for mixed mode operation (WPA+WPA2 and
* TKIP+CCMP). Try to use scan results to figure out whether the AP
* actually supports stronger security and select that if the client
* has support for it, too.
*/
if (wpa_drv_get_capa(wpa_s, &capa))
return; /* Unknown what driver supports */
if (wpa_supplicant_get_scan_results(wpa_s) || wpa_s->scan_res == NULL)
return; /* Could not get scan results for checking advertised
* parameters */
for (i = 0; i < wpa_s->scan_res->num; i++) {
bss = wpa_s->scan_res->res[i];
if (os_memcmp(bss->bssid, cred->mac_addr, ETH_ALEN) != 0)
continue;
ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
if (ie == NULL)
continue;
if (ie[1] != ssid->ssid_len || ssid->ssid == NULL ||
os_memcmp(ie + 2, ssid->ssid, ssid->ssid_len) != 0)
continue;
wpa_printf(MSG_DEBUG, "WPS: AP found from scan results");
break;
}
if (i == wpa_s->scan_res->num) {
wpa_printf(MSG_DEBUG, "WPS: The AP was not found from scan "
"results - use credential as-is");
return;
}
ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0) {
wpa2 = 1;
if (adv.pairwise_cipher & WPA_CIPHER_CCMP)
ccmp = 1;
} else {
ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
if (ie && wpa_parse_wpa_ie(ie, 2 + ie[1], &adv) == 0 &&
adv.pairwise_cipher & WPA_CIPHER_CCMP)
ccmp = 1;
}
if (ie == NULL && (ssid->proto & WPA_PROTO_WPA) &&
(ssid->pairwise_cipher & WPA_CIPHER_TKIP)) {
/*
* TODO: This could be the initial AP configuration and the
* Beacon contents could change shortly. Should request a new
* scan and delay addition of the network until the updated
* scan results are available.
*/
wpa_printf(MSG_DEBUG, "WPS: The AP did not yet advertise WPA "
"support - use credential as-is");
return;
}
if (ccmp && !(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
(ssid->pairwise_cipher & WPA_CIPHER_TKIP) &&
(capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK)) {
wpa_printf(MSG_DEBUG, "WPS: Add CCMP into the credential "
"based on scan results");
if (wpa_s->conf->ap_scan == 1)
ssid->pairwise_cipher |= WPA_CIPHER_CCMP;
else
ssid->pairwise_cipher = WPA_CIPHER_CCMP;
}
if (wpa2 && !(ssid->proto & WPA_PROTO_RSN) &&
(ssid->proto & WPA_PROTO_WPA) &&
(capa.enc & WPA_DRIVER_CAPA_ENC_CCMP)) {
wpa_printf(MSG_DEBUG, "WPS: Add WPA2 into the credential "
"based on scan results");
if (wpa_s->conf->ap_scan == 1)
ssid->proto |= WPA_PROTO_RSN;
else
ssid->proto = WPA_PROTO_RSN;
}
}
static int wpa_supplicant_ctrl_iface_bss(struct wpa_supplicant *wpa_s,
const char *cmd, char *buf,
size_t buflen)
{
u8 bssid[ETH_ALEN];
size_t i;
struct wpa_scan_results *results;
struct wpa_scan_res *bss;
int ret;
char *pos, *end;
const u8 *ie, *ie2;
if (wpa_s->scan_res == NULL &&
wpa_supplicant_get_scan_results(wpa_s) < 0)
return 0;
results = wpa_s->scan_res;
if (results == NULL)
return 0;
if (hwaddr_aton(cmd, bssid) == 0) {
for (i = 0; i < results->num; i++) {
if (os_memcmp(bssid, results->res[i]->bssid, ETH_ALEN)
== 0)
break;
}
} else
i = atoi(cmd);
if (i >= results->num || results->res[i] == NULL)
return 0; /* no match found */
bss = results->res[i];
pos = buf;
end = buf + buflen;
ret = os_snprintf(pos, end - pos,
"bssid=" MACSTR "\n"
"freq=%d\n"
"beacon_int=%d\n"
"capabilities=0x%04x\n"
"qual=%d\n"
"noise=%d\n"
"level=%d\n"
"tsf=%016llu\n"
"ie=",
MAC2STR(bss->bssid), bss->freq, bss->beacon_int,
bss->caps, bss->qual, bss->noise, bss->level,
(unsigned long long) bss->tsf);
if (ret < 0 || ret >= end - pos)
return pos - buf;
pos += ret;
ie = (const u8 *) (bss + 1);
for (i = 0; i < bss->ie_len; i++) {
ret = os_snprintf(pos, end - pos, "%02x", *ie++);
if (ret < 0 || ret >= end - pos)
return pos - buf;
pos += ret;
}
ret = os_snprintf(pos, end - pos, "\n");
if (ret < 0 || ret >= end - pos)
return pos - buf;
pos += ret;
ret = os_snprintf(pos, end - pos, "flags=");
if (ret < 0 || ret >= end - pos)
return pos - buf;
pos += ret;
ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
if (ie)
pos = wpa_supplicant_ie_txt(pos, end, "WPA", ie, 2 + ie[1]);
ie2 = wpa_scan_get_ie(bss, WLAN_EID_RSN);
if (ie2)
pos = wpa_supplicant_ie_txt(pos, end, "WPA2", ie2, 2 + ie2[1]);
pos = wpa_supplicant_wps_ie_txt(pos, end, bss);
if (!ie && !ie2 && bss->caps & IEEE80211_CAP_PRIVACY) {
ret = os_snprintf(pos, end - pos, "[WEP]");
if (ret < 0 || ret >= end - pos)
return pos - buf;
pos += ret;
}
if (bss->caps & IEEE80211_CAP_IBSS) {
ret = os_snprintf(pos, end - pos, "[IBSS]");
if (ret < 0 || ret >= end - pos)
return pos - buf;
pos += ret;
}
ret = os_snprintf(pos, end - pos, "\n");
if (ret < 0 || ret >= end - pos)
return pos - buf;
pos += ret;
ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
ret = os_snprintf(pos, end - pos, "ssid=%s\n",
ie ? wpa_ssid_txt(ie + 2, ie[1]) : "");
if (ret < 0 || ret >= end - pos)
return pos - buf;
pos += ret;
return pos - buf;
}
static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
{
int num, prio, timeout;
struct wpa_scan_result *selected = NULL;
struct wpa_ssid *ssid = NULL;
struct wpa_scan_result *results;
if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
if (wpa_s->conf->ap_scan == 2)
return;
wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
"scanning again");
timeout = 1;
goto req_scan;
}
wpa_supplicant_dbus_notify_scan_results(wpa_s);
if (wpa_s->conf->ap_scan == 2)
return;
results = wpa_s->scan_results;
num = wpa_s->num_scan_results;
while (selected == NULL) {
for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
selected = wpa_supplicant_select_bss(
wpa_s, wpa_s->conf->pssid[prio], results, num,
&ssid);
if (selected)
break;
}
if (selected == NULL && wpa_s->blacklist) {
wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
"and try again");
wpa_blacklist_clear(wpa_s);
} else if (selected == NULL) {
break;
}
}
if (selected) {
/* Do not trigger new association unless the BSSID has changed
* or if reassociation is requested. If we are in process of
* associating with the selected BSSID, do not trigger new
* attempt. */
if (wpa_s->reassociate ||
(os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
(wpa_s->wpa_state != WPA_ASSOCIATING ||
os_memcmp(selected->bssid, wpa_s->pending_bssid,
ETH_ALEN) != 0))) {
if (wpa_supplicant_scard_init(wpa_s, ssid)) {
wpa_supplicant_req_scan(wpa_s, 10, 0);
return;
}
wpa_supplicant_associate(wpa_s, selected, ssid);
} else {
wpa_printf(MSG_DEBUG, "Already associated with the "
"selected AP.");
}
rsn_preauth_scan_results(wpa_s->wpa, results, num);
} else {
wpa_printf(MSG_DEBUG, "No suitable AP found.");
timeout = 5;
goto req_scan;
}
return;
req_scan:
if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
/*
* Quick recovery if the initial scan results were not
* complete when fetched before the first scan request.
*/
wpa_s->scan_res_tried++;
timeout = 0;
}
wpa_supplicant_req_scan(wpa_s, timeout, 0);
}
