1 /*
2 * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
394 int pktTimeout = (timeout * (1 << retry));
395 try {
396 udpSocket.send(opkt);
397
398 // timeout remaining after successive 'receive()'
399 int timeoutLeft = pktTimeout;
400 int cnt = 0;
401 do {
402 if (debug) {
403 cnt++;
404 dprint("Trying RECEIVE(" +
405 cnt + ") retry(" + (retry + 1) +
406 ") for:" + xid + " sock-timeout:" +
407 timeoutLeft + " ms.");
408 }
409 udpSocket.setSoTimeout(timeoutLeft);
410 long start = System.currentTimeMillis();
411 udpSocket.receive(ipkt);
412 long end = System.currentTimeMillis();
413
414 byte[] data = new byte[ipkt.getLength()];
415 data = ipkt.getData();
416 if (isMatchResponse(data, xid)) {
417 return data;
418 }
419 timeoutLeft = pktTimeout - ((int) (end - start));
420 } while (timeoutLeft > minTimeout);
421
422 } finally {
423 udpSocket.disconnect();
424 }
425 return null; // no matching packet received within the timeout
426 }
427 }
428
429 /*
430 * Sends a TCP query, and returns the first DNS message in the response.
431 */
432 private byte[] doTcpQuery(Tcp tcp, Packet pkt) throws IOException {
433
434 int len = pkt.length();
435 // Send 2-byte message length, then send message.
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1 /*
2 * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
394 int pktTimeout = (timeout * (1 << retry));
395 try {
396 udpSocket.send(opkt);
397
398 // timeout remaining after successive 'receive()'
399 int timeoutLeft = pktTimeout;
400 int cnt = 0;
401 do {
402 if (debug) {
403 cnt++;
404 dprint("Trying RECEIVE(" +
405 cnt + ") retry(" + (retry + 1) +
406 ") for:" + xid + " sock-timeout:" +
407 timeoutLeft + " ms.");
408 }
409 udpSocket.setSoTimeout(timeoutLeft);
410 long start = System.currentTimeMillis();
411 udpSocket.receive(ipkt);
412 long end = System.currentTimeMillis();
413
414 byte[] data = ipkt.getData();
415 if (isMatchResponse(data, xid)) {
416 return data;
417 }
418 timeoutLeft = pktTimeout - ((int) (end - start));
419 } while (timeoutLeft > minTimeout);
420
421 } finally {
422 udpSocket.disconnect();
423 }
424 return null; // no matching packet received within the timeout
425 }
426 }
427
428 /*
429 * Sends a TCP query, and returns the first DNS message in the response.
430 */
431 private byte[] doTcpQuery(Tcp tcp, Packet pkt) throws IOException {
432
433 int len = pkt.length();
434 // Send 2-byte message length, then send message.
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