The kernel now longer passes vlan tag information as-is to libpcap,
instead BPF needs to access ancillary data.
That is the reason "vlan 114" works (because it does the right thing),
and a manual filter doesn't, because libpcap never actually sees this.
Offsets are negative because this is the
Can you pleae report it to tcpdump development team?
** Changed in: tcpdump (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/1641429
Title:
tcpdump capture
The offsets are still negative:
root@tools:~# dpkg -l | grep tcpdump
ii tcpdump 4.9.0-2ubuntu2
amd64command-line network traffic analyzer
root@tools:~# tcpdump --version
tcpdump version 4.9.0
libpcap version 1.7.4
OpenSSL 1.0.2g 1 Mar
Can you please try again with the new tcpdump in -security and zesty
pockets?
** Changed in: tcpdump (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1641429
