catarrh
e09aac4cb7
pcap.py: build_pcap(packets) — build PCAP bytes in memory (same format as PcapWriter) database.py: get_messages_raw() — raw elapsed/type/data without decode server.py: GET /api/sessions/<id>/pcap generates a GSMTAP-encapsulated PCAP (ATR/TPDU) with real timestamps and downloads it as <session-name>.pcap (ASCII filename fallback + RFC 5987 UTF-8 for spaces/unicode via _content_disposition) tests: build_pcap + _content_disposition (67 total)
61 lines
2.3 KiB
Python
61 lines
2.3 KiB
Python
"""Tests for PCAP generation and Content-Disposition filename."""
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import struct
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import unittest
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from simtrace2_pysniff.pcap import build_pcap, PCAP_MAGIC, LINKTYPE_GSMTAP
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from simtrace2_pysniff.server.server import _content_disposition
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class TestBuildPcap(unittest.TestCase):
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def _gsmtap_hdr(self, sub_type):
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import struct
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return struct.pack('!BBBBHBBIBBBB', 2, 4, 7, 0, 0, 0, 0, 0, sub_type, 0, 0, 0)
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def test_empty(self):
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data = build_pcap([])
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self.assertEqual(len(data), 24) # just the global header
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magic, vmaj, vmin, _tz, _sig, snaplen, network = struct.unpack('<IHHiIII', data[:24])
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self.assertEqual(magic, PCAP_MAGIC)
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self.assertEqual((vmaj, vmin), (2, 4))
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self.assertEqual(snaplen, 65535)
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self.assertEqual(network, LINKTYPE_GSMTAP)
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def test_one_packet(self):
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pkt = build_pcap([(self._gsmtap_hdr(2), b'\xa0\xa4\x00\x00\x02\x3f\x00', 1234567890.5)])
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self.assertEqual(len(pkt), 24 + 16 + (16 + 7)) # global + pkt hdr + gsmtap hdr + data
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ts_sec, ts_usec, incl_len, orig_len = struct.unpack('<IIII', data_bytes := pkt[24:40])
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self.assertEqual(ts_sec, 1234567890)
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self.assertEqual(ts_usec, 500000)
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self.assertEqual(incl_len, 23)
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self.assertEqual(orig_len, 23)
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def test_multiple_packets(self):
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packets = [
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(self._gsmtap_hdr(1), b'\x3b\x00', 1.0),
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(self._gsmtap_hdr(2), b'\x80\xf2\x00\x00\x00', 2.0),
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]
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data = build_pcap(packets)
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# global header + 2 packets (each: 16 pkt hdr + 16 gsmtap hdr + data)
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self.assertEqual(len(data), 24 + (16 + 16 + 2) + (16 + 16 + 5))
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class TestContentDisposition(unittest.TestCase):
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def test_ascii(self):
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h = _content_disposition('My Capture.pcap')
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self.assertIn('filename="My Capture.pcap"', h)
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def test_unicode(self):
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h = _content_disposition('Моя сессия.pcap')
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# ASCII fallback uses '?' replacements; UTF-8 filename* carries the real name
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self.assertIn("filename*=UTF-8''", h)
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self.assertIn('%D0%9C', h) # 'М' = %D0%9C
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def test_special_chars(self):
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h = _content_disposition('a"b.pcap')
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self.assertIn('filename="a_b.pcap"', h)
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if __name__ == '__main__':
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unittest.main()
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