/**
* Test sub header access.
*
* @throws IOException Signals that an I/O exception has occurred.
*/
public void testSubHeaderAccess() throws IOException {
Ip4 ip = new Ip4();
Ip4.Timestamp ts = new Ip4.Timestamp();
Ip4.LooseSourceRoute lsroute = new Ip4.LooseSourceRoute();
Ip4.StrictSourceRoute ssroute = new Ip4.StrictSourceRoute();
Ip4.RecordRoute record = new Ip4.RecordRoute();
JPacket packet = TestUtils.getPcapPacket("tests/test-icmp-recordroute-opt.pcap", 0);
JFormatter out = new TextFormatter();
out.format(packet);
assertNotNull(packet);
assertTrue(packet.hasHeader(ip));
assertTrue(ip.hasSubHeaders());
assertFalse(ip.hasSubHeader(lsroute));
assertFalse(ip.hasSubHeader(ssroute));
assertFalse(ip.hasSubHeader(ts));
assertTrue(ip.hasSubHeader(record));
assertEquals(9, record.addressCount());
byte[] b = record.address(0);
assertNotNull(b);
assertEquals(4, b.length);
assertEquals(-64, b[0]); // 192 in unsinged int
assertEquals(-88, b[1]); // 168 in unsigned int
assertEquals(1, b[2]); // 1
assertEquals(13, b[3]); // 13
assertNotNull(packet);
assertTrue(packet.hasHeader(ip));
assertTrue(ip.hasSubHeaders());
assertFalse(ip.hasSubHeader(lsroute));
assertFalse(ip.hasSubHeader(ssroute));
assertFalse(ip.hasSubHeader(ts));
assertTrue(ip.hasSubHeader(record));
assertEquals(9, record.addressCount());
/*
* Now do it a second time without resetting the packet
*/
b = record.address(0);
assertNotNull(b);
assertEquals(4, b.length);
assertEquals(-64, b[0]); // 192 in unsinged int
assertEquals(-88, b[1]); // 168 in unsigned int
assertEquals(1, b[2]); // 1
assertEquals(13, b[3]); // 13
}