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<?php declare(strict_types=1); |
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namespace DaveRandom\LibLifxLan\Examples; |
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use DaveRandom\Network\IPEndpoint; |
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/** |
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* @param IPEndpoint $localEndpoint |
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* @return resource |
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*/ |
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function udp_create_socket(IPEndpoint $localEndpoint) |
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{ |
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$ctx = \stream_context_create(['socket' => ['so_broadcast' => true]]); |
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if (!$socket = @\stream_socket_server('udp://' . $localEndpoint, $errNo, $errStr, \STREAM_SERVER_BIND, $ctx)) { |
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throw new \RuntimeException("Failed to create local socket: {$errNo}: {$errStr}"); |
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} |
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return $socket; |
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} |
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/** |
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* @param int $timeoutMs |
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* @return int[] |
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*/ |
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function ms_to_secs_usecs(?int $timeoutMs): array |
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{ |
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return $timeoutMs !== null |
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? [(int)($timeoutMs / 1000), ($timeoutMs % 1000) * 1000] |
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: [null, null]; |
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} |
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/** |
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* @param resource $socket |
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* @param int $timeoutMs |
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* @return array|null |
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*/ |
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function udp_await_packet($socket, int $timeoutMs = null): ?array |
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{ |
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$r = [$socket]; |
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$w = $e = null; |
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[$timeoutSecs, $timeoutUsecs] = ms_to_secs_usecs($timeoutMs); |
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if (false === $count = \stream_select($r, $w, $e, $timeoutSecs, $timeoutUsecs ?? 0)) { |
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throw new \RuntimeException("select() failed!"); |
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} |
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if ($count === 0) { |
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return null; |
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} |
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$data = \stream_socket_recvfrom($socket, 1024, 0, $address); |
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return [$data, IPEndpoint::parse($address)]; |
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} |
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/** |
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* @param resource $socket |
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* @param int $timeoutMs |
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* @return array[] |
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*/ |
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function udp_await_packets($socket, int $timeoutMs): array |
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{ |
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$packets = []; |
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$start = \microtime(true); |
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$remaining = $timeoutMs; |
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do { |
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if (null === $buffer = udp_await_packet($socket, $remaining)) { |
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break; |
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} |
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$packets[] = $buffer; |
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$remaining = (int)($timeoutMs - ((\microtime(true) - $start) * 1000)); |
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} while ($remaining > 0); |
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return $packets; |
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} |
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DaveRandom /
LibLifxLan
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