why nr-rrc dissectors are not called in pdcp-nr

asked 2020-02-01 02:24:06 +0000

pingguoyuan
1 ●2 ●2 ●4

updated 2020-02-01 08:42:36 +0000

Guy Harris
19890 ●3 ●634 ●207

When pdcp-nr packets are decoded, nr-rrc payload is not dissected. How can nr-rrc dissectors are triggered, as dl_dcch is spcecified in pdcp-nr tags?

Another question is how to tell pdcp-nr that no mac-i filed is attached? MAC-I presense tag is 0 byte?

#define PDCP_NR_MACI_PRES_TAG              0x0F
/* 0 byte */

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answered 2020-02-01 08:13:11 +0000

Pascal Quantin
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updated 2020-02-01 08:13:24 +0000

Hi,

1/ the code is ready to call the NR-RRC disssector but the lookup_rrc_dissector_handle() was never finished. I'm gonna fix that.

2/ to indicate that no MAC-I is present in a DRB, simply do not put the presence tag. Note that this is exclusively applicable to DRBs: SRB PDUs always have a MAC-I per the specification.

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And calling NR RRC dissector is now implemented in Wireshark v3.3.0rc0-479-g4ef8ace610

Pascal Quantin ( 2020-02-01 10:02:40 +0000 )edit

Thanks for your help. It works well.Great job!

pingguoyuan ( 2020-02-01 12:07:39 +0000 )edit

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Asked: 2020-02-01 02:24:06 +0000

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Last updated: Feb 01 '20

why nr-rrc dissectors are not called in pdcp-nr edit