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RTP: rework code (#2021)

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Try avoiding false positives: look for 3 RTP packets before classifing
the flow as such.

Add a generic function `is_rtp_or_rtcp()` to identify RTP/RTCP packets also
in other dissectors (see 3608ab01b commit message for an example)
This commit is contained in:
Ivan Nardi 2023-06-23 08:12:40 +02:00 • committed by GitHub
parent 15f0e1480c
commit 7e64d9f66d
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45 changed files with 438 additions and 300 deletions
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tests/cfgs/enable_payload_stat/result/1kxun.pcap.out
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@ -5,7 +5,7 @@ DPI Packets (UDP): 120 (1.21 pkts/flow)
Confidence Unknown : 14 (flows)
Confidence Match by port : 6 (flows)
Confidence DPI : 177 (flows)
Num dissector calls: 4534 (23.02 diss/flow)
Num dissector calls: 4537 (23.03 diss/flow)
LRU cache ookla: 0/0/0 (insert/search/found)
LRU cache bittorrent: 0/60/0 (insert/search/found)
LRU cache zoom: 0/0/0 (insert/search/found)