[tcpdump-workers] Re: [tcpdump] About struct in_addr / struct in6_addr

2023-02-18 Thread Guy Harris
On Feb 18, 2023, at 10:27 AM, Denis Ovsienko  wrote:

> OS IPv6 support would be a very reasonable requirement for tcpdump 5.

Which would, among other things, let us remove the tests for various add-on 
IPv6 stacks in configure.ac.
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[tcpdump-workers] Re: [tcpdump] About struct in_addr / struct in6_addr

2023-02-18 Thread Denis Ovsienko
On Sun, 17 Jul 2022 16:11:01 -0700
Guy Harris via tcpdump-workers 
wrote:

> On Jul 17, 2022, at 3:39 PM, Bill Fenner  wrote:
> 
> > IMO it is safe to drop support for OSes lacking native IPv6
> > support.  
> 
> Yeah.  Back when IPv6 support was added to tcpdump, it was an
> experimental new technology and the configure script had to figure
> out which of several add-on IPv6 packages you had installed.  Now a
> significant amount of Wikipedia vandalism comes from IPv6 addresses
> rather than IPv4 addresses. :-)

OS IPv6 support would be a very reasonable requirement for tcpdump 5.

-- 
Denis Ovsienko
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[tcpdump-workers] TCP Header Flags

2023-02-18 Thread Francois-Xavier Le Bail
Hello,

https://www.rfc-editor.org/rfc/rfc9293 states:
"Control bits:

The control bits are also known as "flags". Assignment is managed by IANA 
from the "TCP Header Flags" registry [62]. The currently assigned control bits 
are CWR, ECE, URG, ACK, PSH, RST, SYN, and FIN."

(All on three characters.)

To be in sync with it, we could use 'tcp-psh' in addition to 'tcp-push' in 
libpcap scanner.l, and in pcap-filter.7 and tcpdump.1 man pages.
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