113 lines
2.9 KiB
PHP
113 lines
2.9 KiB
PHP
<?php
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// {{{ICINGA_LICENSE_HEADER}}}
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// {{{ICINGA_LICENSE_HEADER}}}
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namespace Icinga\Protocol\Nrpe;
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use Icinga\Exception\IcingaException;
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class Connection
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{
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protected $host;
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protected $port;
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protected $connection;
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protected $use_ssl = false;
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protected $lastReturnCode = null;
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public function __construct($host, $port = 5666)
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{
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$this->host = $host;
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$this->port = $port;
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}
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public function useSsl($use_ssl = true)
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{
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$this->use_ssl = $use_ssl;
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return $this;
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}
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public function sendCommand($command, $args = null)
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{
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if (! empty($args)) {
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$command .= '!' . implode('!', $args);
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}
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$packet = Packet::createQuery($command);
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return $this->send($packet);
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}
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public function getLastReturnCode()
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{
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return $this->lastReturnCode;
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}
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public function send(Packet $packet)
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{
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$conn = $this->connection();
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$bytes = $packet->getBinary();
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fputs($conn, $bytes, strlen($bytes));
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// TODO: Check result checksum!
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$result = fread($conn, 8192);
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if ($result === false) {
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throw new IcingaException('CHECK_NRPE: Error receiving data from daemon.');
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} elseif (strlen($result) === 0) {
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throw new IcingaException(
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'CHECK_NRPE: Received 0 bytes from daemon. Check the remote server logs for error messages'
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);
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}
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// TODO: CHECK_NRPE: Receive underflow - only %d bytes received (%d expected)
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$code = unpack('n', substr($result, 8, 2));
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$this->lastReturnCode = $code[1];
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$this->disconnect();
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return rtrim(substr($result, 10, -2));
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}
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protected function connect()
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{
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$ctx = stream_context_create();
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if ($this->use_ssl) {
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// TODO: fail if not ok:
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$res = stream_context_set_option($ctx, 'ssl', 'ciphers', 'ADH');
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$uri = sprintf('ssl://%s:%d', $this->host, $this->port);
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} else {
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$uri = sprintf('tcp://%s:%d', $this->host, $this->port);
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}
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$this->connection = @stream_socket_client(
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$uri,
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$errno,
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$errstr,
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10,
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STREAM_CLIENT_CONNECT,
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$ctx
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);
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if (! $this->connection) {
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throw new IcingaException(
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'NRPE Connection failed: %s',
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$errstr
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);
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}
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}
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protected function connection()
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{
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if ($this->connection === null) {
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$this->connect();
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}
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return $this->connection;
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}
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protected function disconnect()
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{
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if (is_resource($this->connection)) {
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fclose($this->connection);
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$this->connection = null;
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}
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return $this;
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}
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public function __destruct()
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{
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$this->disconnect();
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}
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}
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