function searchS20()
{
//
// This function searchs for all S20 in a local network
// through a broadcast call
// and returns an associative array $s20Table indexed
// by each S20 mac adress. Each array position is itself
// an associative array which contains
//
// $s20Table[$mac)['ip'] - IP adresss
// $s20Table[$mac)['st'] - current S20 status (ON=1,OFF=0)
// $s20Table[$mac)['imac'] - Inverted mac,not strictly required,
// computed just once for sake of efficiency.
//
// Note that $mac and is represented as a sequence of hexadecimals
// without the usual separators; for example, ac:cf:23:34:e2:b8 is represented
// as "accf2334e2b8".
//
// An additional field $s20Table[$mac]['name'] is later added
// to each entry with the name assigned to each device.
// This is done in a specific function since it requires a separate
// request to each S20 (see function getName() and updNamesAndTimerAfterOn below).
//
// Returns the $s20Table array
//
// echo "Searching S20<p>";
$s = createSocketAndSendMsg(DISCOVERY_MSG, IP_BROADCAST);
$recIP = "";
$recPort = 0;
$s20Table = array();
$loop_count = 0;
while (1) {
$n = @socket_recvfrom($s, $binRecMsg, BUFFER_SIZE, 0, $recIP, $recPort);
if ($n == 0) {
if (++$loop_count > 3) {
if (count($s20Table) == 0) {
error_log("Giving up searching for sockets");
echo "<h1>Internal server error (see logs)</h1>";
exit(1);
} else {
break;
}
}
sendHexMsg($s, DISCOVERY_MSG, IP_BROADCAST);
continue;
}
if ($n >= 42) {
$recMsg = hex_byte2str($binRecMsg, $n);
if (substr($recMsg, 0, 4) == MAGIC_KEY && substr($recMsg, 8, 4) == "7161") {
$mac = substr($recMsg, 14, 12);
$status = (int) substr($recMsg, -1);
$s20Table[$mac] = array();
$s20Table[$mac]['ip'] = $recIP;
$s20Table[$mac]['st'] = $status;
$s20Table[$mac]['imac'] = invMac($mac);
}
}
}
socket_close($s);
return $s20Table;
}
function searchS20($s20Table)
{
//
// This function searchs for all S20 in a local network
// through a broadcast call
// and returns an associative array $s20Table indexed
// by each S20 mac adress. Each array position is itself
// an associative array which contains
//
// $s20Table[$mac)['ip'] - IP adresss
// $s20Table[$mac)['st'] - current S20 status (ON=1,OFF=0)
//
// Note that $mac and is represented as a sequence of hexadecimals
// without the usual separators; for example, ac:cf:23:34:e2:b8 is represented
// as "accf2334e2b8".
//
// An additional field $s20Table[$mac]['name'] is later added
// to each entry with the name assigned to each device.
// This is done in a specific function since it requires a separate
// request to each S20 (see function getName() and updNamesAndTimerAfterOn below).
//
// Several other fields were later added during application development
//
// Returns the $s20Table array
//
$s = createSocketAndSendMsg(DISCOVERY_MSG, IP_BROADCAST);
$recIP = "";
$recPort = 0;
if (!$s20Table || count($s20Table) == 0) {
$s20Table = array();
}
$loopCount = 0;
while (1) {
$n = @socket_recvfrom($s, $binRecMsg, BUFFER_SIZE, 0, $recIP, $recPort);
$now = time();
if ($n == 0) {
if (++$loopCount > 3) {
if (count($s20Table) == 0) {
error_log("Giving up searching for sockets");
echo "<h2>No sockets found</h2>\n\n";
echo " Please check if all sockets are on-line and assure that they\n";
echo " are not locked:\n (check WiWo app -> select socket -> more -> advanced).<p>\n\n";
echo " In this version, locked or password protected devices are not supported.\n\n<p>";
exit(1);
} else {
break;
}
}
sendHexMsg($s, DISCOVERY_MSG, IP_BROADCAST);
continue;
}
if ($n >= 42) {
$recMsg = hex_byte2str($binRecMsg, $n);
if (substr($recMsg, 0, 4) == MAGIC_KEY && substr($recMsg, 8, 4) == "7161") {
$mac = substr($recMsg, 14, 12);
$status = (int) substr($recMsg, -1);
if (!array_key_exists($mac, $s20Table)) {
$s20Table[$mac] = array();
$s20Table[$mac]['imac'] = invMac($mac);
$s20Table[$mac]['next'] = NUMBER_OF_NEXT_ACTIONS_DISPLAYED_IN_MAIN_PAGE;
}
$s20Table[$mac]['ip'] = $recIP;
$s20Table[$mac]['st'] = $status;
$s20Table[$mac]['time'] = getSocketTime($recMsg);
$s20Table[$mac]['serverTime'] = $now;
}
}
}
socket_close($s);
return $s20Table;
}