Ask Your Question

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

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

pingguoyuan gravatar image

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

Guy Harris gravatar image

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 */
edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted

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

Pascal Quantin gravatar image

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


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.

edit flag offensive delete link more


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

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

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

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

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Question Tools

1 follower


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

Seen: 81 times

Last updated: Feb 01