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On Dec 22, 2020, at 3:31 PM, Linus Lüssing wrote:
> Basically we want to do live measurements of the overhead of the mesh
> routing protocol and measure and dissect the layer 2 broadcast traffic.
> To measure how much ARP, DHCP, ICMPv6 NS/NA/RS/RA, MDNS, LLDP overhead
> etc.
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On Tue, Dec 22, 2020 at 02:28:17PM -0800, Guy Harris wrote:
> On Dec 22, 2020, at 2:05 PM, Linus Lüssing via tcpdump-workers
> wrote:
>
> > I was experimenting a bit with migrating from the use of
> > pcap_offline_filter() to pcap_setfilter().
> >
> > I was a bit surprised
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On Dec 22, 2020, at 2:05 PM, Linus Lüssing via tcpdump-workers
wrote:
> I was experimenting a bit with migrating from the use of
> pcap_offline_filter() to pcap_setfilter().
>
> I was a bit surprised that installing for instance 500 pcap
> handlers
What is a "pcap handler
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Hi,
I was experimenting a bit with migrating from the use of
pcap_offline_filter() to pcap_setfilter().
I was a bit surprised that installing for instance 500 pcap
handlers with a BPF rule "arp" via pcap_setfilter() reduced
the TCP performance of iperf3 over veth interfaces
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On Dec 22, 2020, at 8:36 AM, Michael Richardson wrote:
> Guy Harris wrote:
>
>> And, as per my idea of using 65535 to mean "custom linktype", similar
>> to pcapng custom blocks and options, with either:
>
> I'm happy with this proposal, but isn't it pcapng specific?
No -
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wrote:
>> -Message d'origine-
>> De : OPSAWG [mailto:opsawg-boun...@ietf.org] De la part de Michael
>> Richardson
>> Envoyé : mardi 22 décembre 2020 17:36
>> À : Guy Harris
>> Cc : Pcap-ng file format ;
>> ops...@ietf.org; tcpdump-workers
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<#secure method=pgp mode=sign>
Guy Harris wrote:
> a 6-bit "extension" field, storing information about the
> capture, such an indication of whether the packets include an
> FCS and, if so, how many bytes of FCS are present.
> So what NetBSD had was a conve
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<#secure method=pgp mode=sign>
Guy Harris wrote:
>> The short of it is:
>>
>> 1) reserve bits 16:28 of linktype as zero.
> In pcap files, presumably; you have only bits 0:15 in pcapng IDBs.
Yes. That's why I changed the illustration of the packet so that
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On Dec 22, 2020, at 1:01 AM, Guy Harris wrote:
> They were originally intended for use with some stuff NetBSD was doing (I'd
> have to look into the history of the NetBSD code), but I think NetBSD stopped
> doing that.
The commit message for the change that added the macr
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On Dec 21, 2020, at 4:31 PM, Michael Richardson wrote:
> Hi, I have reworked the document that Guy put into XML describing the *PCAP*
> (not NG) format. I found the text for LinkType to be confusing, and
> frankly, I think wrong.
>
> * LinkType (32 bits): an unsigned v
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