@Test
public void testTunWriteInvalidIP() throws Exception {
boolean thrownexception = false;
TunDevice tun = null;
log.info("test tunnel write invalid IP");
try {
tun = openTun("test");
tun.open();
Assert.assertTrue(tun.getFd() > 0);
log.info("device: {} fd: {}", tun.getDevice(), tun.getFd());
int size = 1000;
ByteBuffer ipPacket = utils.getBadIpPacket(ICMPPacket.PROTOCOL, size);
tun.writeByteBuffer(ipPacket, size);
} catch (libc.ErrnoException errno) {
// invalid argument
log.info("got exeception (OK) : {}", errno.getMessage());
Assert.assertEquals(22, errno.getErrno());
thrownexception = true;
} finally {
if (tun != null) {
tun.close();
Assert.assertEquals(0, tun.getFd());
Assert.assertTrue(thrownexception);
}
}
}
@Test
public void testTunWrite() throws Exception {
boolean thrownexception = false;
TunDevice tun = null;
log.info("test tunnel write");
try {
tun = openTun("test");
tun.open();
Assert.assertTrue(tun.getFd() > 0);
log.info("device: {} fd: {}", tun.getDevice(), tun.getFd());
// we need to write some bytes to tun device
ByteBuffer buf = ByteBuffer.allocateDirect(60);
// create dummy ICMP packet,
buf.clear();
buf.put((byte) 0x45); // IPv4 + header size
buf.put((byte) 0x00); // dscp
buf.put((byte) 60); // size
buf.putShort((byte) 0x00);
buf.putShort((byte) 0x00);
buf.put((byte) 0x40); // TTL
buf.put((byte) 0x01); // protocol
int x = tun.writeByteBuffer(buf, 60);
Assert.assertEquals(60, x);
} finally {
if (tun != null) {
tun.close();
Assert.assertEquals(0, tun.getFd());
}
}
}