https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=16116
--- Comment #17 from michal.pec...@telekom.sk ---
(In reply to Chuck Craft from comment #9)
> Can you load the 1.9.0 package? Looks like a big improvement.
>
> # tcpdump --version
> tcpdump version 4.9.2
> libpcap version 1.8.1
> OpenSSL 1.0.2s 28 May 2019
> # tcpdump -i lo -d "vlan 545"
> (000) ldb [-4048]
> (001) jeq #0x1 jt 2 jf 5
> (002) ldb [-4052]
> (003) jeq #0x221 jt 4 jf 5
> (004) ret #262144
> (005) ret #0
> #
>
> root@kali:~# tcpdump --version
> tcpdump version 4.9.3-PRE-GIT_2019_09_07
> libpcap version 1.9.0 (with TPACKET_V3)
> OpenSSL 1.1.1d 10 Sep 2019
> root@kali:~# tcpdump -i lo -d "vlan 545"
> (000) ldb [-4048]
> (001) jeq #0x1 jt 6 jf 2
> (002) ldh [12]
> (003) jeq #0x8100 jt 6 jf 4
> (004) jeq #0x88a8 jt 6 jf 5
> (005) jeq #0x9100 jt 6 jf 14
> (006) ldb [-4048]
> (007) jeq #0x1 jt 8 jf 10
> (008) ldb [-4052]
> (009) ja 11
> (010) ldh [14]
> (011) and #0xfff
> (012) jeq #0x221 jt 13 jf 14
> (013) ret #262144
> (014) ret #0
> root@kali:~#
I have manage to install new version of tcpdump which seems to work beter now
but the dumpcap seams unaffected.
user@tacmerak:~$ dumpcap -f "vlan 200" -d Capturing on 'enp0s31f6'
(000) ldb [-4048]
(001) jeq #0x1 jt 2 jf 5
(002) ldb [-4052]
(003) jeq #0xc8 jt 4 jf 5
(004) ret #262144
(005) ret #0
user@tacmerak:~$ tcpdump --version
tcpdump version 4.9.3
libpcap version 1.9.1 (with TPACKET_V3)
user@tacmerak:~$ sudo tcpdump -d "vlan 545"
(000) ldb [-4048]
(001) jeq #0x1 jt 6 jf 2
(002) ldh [12]
(003) jeq #0x8100 jt 6 jf 4
(004) jeq #0x88a8 jt 6 jf 5
(005) jeq #0x9100 jt 6 jf 14
(006) ldb [-4048]
(007) jeq #0x1 jt 8 jf 10
(008) ldb [-4052]
(009) ja 11
(010) ldh [14]
(011) and #0xfff
(012) jeq #0x221 jt 13 jf 14
(013) ret #262144
(014) ret #0
user@tacmerak:~$
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