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From "Lionel Cons (JIRA)" <j...@apache.org>
Subject [jira] [Created] (APLO-252) Spurious bytes added by the UDP connector
Date Tue, 28 Aug 2012 06:34:07 GMT
Lionel Cons created APLO-252:
--------------------------------

             Summary: Spurious bytes added by the UDP connector
                 Key: APLO-252
                 URL: https://issues.apache.org/jira/browse/APLO-252
             Project: ActiveMQ Apollo
          Issue Type: Bug
         Environment: apollo-99-trunk-20120827.204756-104
            Reporter: Lionel Cons


When retrieving over TCP a STOMP frame sent by UDP, Apollo sends spurious bytes, violating
the STOMP protocol.

Here is the tcpdump capture of what has been sent to Apollo:

	0x0010:  808e 126c 8b2e eec3 004b 4600 5345 4e44  ...l.....KF.SEND
	0x0020:  0a6c 6f67 696e 3a67 7565 7374 0a70 6173  .login:guest.pas
	0x0030:  7363 6f64 653a 6775 6573 740a 6465 7374  scode:guest.dest
	0x0040:  696e 6174 696f 6e3a 2f71 7565 7565 2f74  ination:/queue/t
	0x0050:  6573 7434 7564 700a 0a68 656c 6c6f 00    est4udp..hello.

This is a small frame with "hello" as body, properly ended by the NULL byte.

When subscribed to the queue, the consumer receives from Apollo:

	0x0030:  a45e dbd6 4d45 5353 4147 450a 7375 6273  .^..MESSAGE.subs
	0x0040:  6372 6970 7469 6f6e 3a61 3430 6162 3130  cription:a40ab10
	0x0050:  2d35 3033 6336 3437 632d 3465 3065 2d33  -503c647c-4e0e-3
	0x0060:  3166 352d 320a 7365 6e64 6572 2d6c 6f67  1f5-2.sender-log
	0x0070:  696e 3a67 7565 7374 0a73 656e 6465 722d  in:guest.sender-
	0x0080:  6970 3a0a 7469 6d65 7374 616d 703a 3133  ip:.timestamp:13
	0x0090:  3436 3133 3531 3638 3134 310a 6d65 7373  46135168141.mess
	0x00a0:  6167 652d 6964 3a61 706f 6c6c 6f2d 3131  age-id:apollo-11
	0x00b0:  310a 6465 7374 696e 6174 696f 6e3a 2f71  1.destination:/q
	0x00c0:  7565 7565 2f74 6573 7434 7564 700a 0a68  ueue/test4udp..h
	0x00d0:  656c 6c6f 0000 0a                        ello...

The "hello" body is now followed by one more NULL and a NL.

The NL is just noise that can be ignored but the extra NULL is not allowed by the spec.

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