forked from osmocom/wireshark
74 lines
3.8 KiB
Python
74 lines
3.8 KiB
Python
#
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# Wireshark tests
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#
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# Copyright (c) 2018 Peter Wu <peter@lekensteyn.nl>
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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#
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'''Follow Stream tests'''
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import subprocesstest
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import fixtures
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@fixtures.mark_usefixtures('test_env')
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@fixtures.uses_fixtures
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class case_follow_tcp(subprocesstest.SubprocessTestCase):
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def test_follow_tcp_bad_conditions(self, cmd_tshark, capture_file):
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'''Checks whether Follow TCP correctly handles lots of edge cases.'''
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# Edge cases include:
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# 1. two sequential segments
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# 2. out-of-order (swapped two sequential segments)
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# 3. Bad overlap (second overlap with different data should be ignored)
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# 4. Ignore bad retransmitted data, but extend with remaining data.
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# 5. Check handling of overlapping data while fragments are incomplete
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# (out-of-order - cannot add fragments to stream)
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# 6. lost but acked segments
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# 7. lost 3/5 fragments, but acked
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# Not checked: lost and not acked (currently truncated, is that OK?)
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proc = self.assertRun((cmd_tshark,
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'-r', capture_file('tcp-badsegments.pcap'),
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'-qz', 'follow,tcp,hex,0',
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))
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self.assertIn("""\
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===================================================================
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Follow: tcp,hex
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Filter: tcp.stream eq 0
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Node 0: 10.0.0.1:32323
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Node 1: 10.0.0.2:80
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00000000 47 45 54 20 2f 20 48 54 54 50 2f 31 2e 31 0d 0a GET / HT TP/1.1..
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00000010 48 6f 73 74 3a 6c 6f 63 61 6c 68 6f 73 74 0d 0a Host:loc alhost..
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00000020 58 2d 53 77 61 70 70 65 64 3a 20 31 73 74 0d 0a X-Swappe d: 1st..
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00000030 58 2d 53 77 61 70 70 65 64 3a 20 32 6e 64 0d 0a X-Swappe d: 2nd..
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00000040 58 2d 4f 76 65 72 6c 61 70 2d 50 61 63 6b 65 74 X-Overla p-Packet
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00000050 3a 20 65 78 74 72 61 20 64 61 74 61 2d 2d 0d 0a : extra data--..
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00000060 58 2d 4f 6f 4f 2d 4f 76 65 72 6c 61 70 3a 20 74 X-OoO-Ov erlap: t
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00000070 68 69 73 20 69 73 20 64 65 6c 61 79 65 64 0d 0a his is d elayed..
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00000080 58 2d 4f 6f 4f 2d 4f 76 65 72 6c 61 70 32 3a 20 X-OoO-Ov erlap2:
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00000090 73 65 63 6f 6e 64 20 64 65 6c 61 79 65 64 0d 0a second d elayed..
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000000A0 58 2d 4f 6f 4f 2d 4f 76 65 72 6c 61 70 33 3a 65 X-OoO-Ov erlap3:e
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000000B0 78 74 65 6e 64 20 66 72 61 67 6d 65 6e 74 0d 0a xtend fr agment..
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000000C0 5b 33 32 20 62 79 74 65 73 20 6d 69 73 73 69 6e [32 byte s missin
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000000D0 67 20 69 6e 20 63 61 70 74 75 72 65 20 66 69 6c g in cap ture fil
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000000E0 65 5d 00 e].
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000000E3 58 2d 4d 69 73 73 69 6e 67 2d 42 75 74 2d 41 63 X-Missin g-But-Ac
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000000F3 6b 65 64 2d 50 72 65 76 69 6f 75 73 3a 31 0d 0a ked-Prev ious:1..
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00000103 5b 31 36 20 62 79 74 65 73 20 6d 69 73 73 69 6e [16 byte s missin
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00000113 67 20 69 6e 20 63 61 70 74 75 72 65 20 66 69 6c g in cap ture fil
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00000123 65 5d 00 e].
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00000126 3a :
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00000127 5b 31 33 20 62 79 74 65 73 20 6d 69 73 73 69 6e [13 byte s missin
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00000137 67 20 69 6e 20 63 61 70 74 75 72 65 20 66 69 6c g in cap ture fil
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00000147 65 5d 00 e].
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0000014A 0d .
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0000014B 5b 31 20 62 79 74 65 73 20 6d 69 73 73 69 6e 67 [1 bytes missing
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0000015B 20 69 6e 20 63 61 70 74 75 72 65 20 66 69 6c 65 in capt ure file
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0000016B 5d 00 ].
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0000016D 58 2d 4d 69 73 73 69 6e 67 2d 33 2d 4f 75 74 2d X-Missin g-3-Out-
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0000017D 4f 66 2d 35 2d 42 75 74 2d 41 43 4b 3a 59 0d 0a Of-5-But -ACK:Y..
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0000018D 0d 0a ..
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===================================================================
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""".replace("\r\n", "\n"),
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proc.stdout_str)
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