Re: [tcpdump-workers] continuous integration status update

[Denis Ovsienko via tcpdump-workers]

--- Begin Message ---
On Fri, 12 Feb 2021 16:18:10 +
Denis Ovsienko via tcpdump-workers 
wrote:

[...]
> The Travis CI subscription will cease in early March (unless there is
> a sponsor willing to pay 82.80 USD per month). At this time the
> impact of that would be the following:
> 
> * Linux on arm64
> * Linux on ppc64le
> * Linux on s390x
> 
> To me keeping these does not seem to be as important as other ongoing
> work, but if I have enough spare time later, I might try rigging up a
> standalone arm64 CI instance, just to learn one more aspect about it
> in the process.

Hello list.

The Travis CI account is off the paid plan starting today. Since it
happens to have 1 credits again, I have left it on hold to allow
future pre-release testing of s390x and ppc64le.

A partial replacement for that service is ci.tcpdump.org, which is a
buildbot instance doing Linux AArch64 builds for the github.com
repositories. It works, although there remains some space for
improvement:

* Some commits sometimes schedule two builds instead of one for no
  obvious reason.
* The commit status updates show my user account as the source. I had
  tried to make them come from an application account, but without
  success yet.
* There are no e-mail notifications yet.
* The buildbot worker is a bit slow, so a tcpdump build matrix run takes
  well over an hour to complete.

These imperfections will be addressed one by one later as time permits.

-- 
Denis Ovsienko
--- End Message ---
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Re: [tcpdump-workers] Link Layer Type Request NETANALYZER_NG

[Guy Harris via tcpdump-workers]

--- Begin Message ---
On Mar 3, 2021, at 8:58 AM, Jan Adam via tcpdump-workers 
 wrote:

> for our new analysis product netANALYZER NG I would like to request a new 
> link-layer type value.
> 
> NETANALYZER_NG
> 
> The new Link-Layer-Type format is described as following:
> 
> Next-generation packet structure:
> +---+
> |   Payload |
> .   .
> .   .
> |   |
> +---+
> |   Footer  |
> |   |
> +---+
> 
> Next-gen footer description:
> 
> [16 bit]  Versionrepresents current structure version
> [64 bit]  Timestamp1 first timestamp in ns, UNIX time since 1.1.1970
> [64 bit]  Timestamp2 second timestamp in ns, UNIX time since 1.1.1970
> [32 bit]  TimestampAccuracy  actual accuracy of Timestamp1 and Timestamp2 in 
> ns. 0: actual accuracy is unknown

What do these two time stamps represent?  They presumably don't represent the 
packet arrival time, as both pcap and pcapng already provide that for all 
packets.

> [8 bit]   Representation identification of the following content

What are the possible values of this field, and what do those values signify?

> [32 bit]  SrcIdPart1 source identifier part 1
> [32 bit]  SrcIdPart2 source identifier part 2
> [8 bit]   SrcIdPart3 source identifier part 3
> [8 bit]   SrcIdPart4 source identifier part 3

So there's an 80-bit source identifier; what does that value signify?

> [64 bit]  VarId  variable identifier
> [64 bit]  VarState   variable error states, depending on 
> representation
> [8 bit]   VarTypevariable data type

What do those signify?

> [32 bit]  VarSizesize of raw frame payload

Presumably everything beyond that size is the footer; what are the contents of 
the footer?
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[tcpdump-workers] Link Layer Type Request NETANALYZER_NG

[Jan Adam via tcpdump-workers]

--- Begin Message ---
Hi,
for our new analysis product netANALYZER NG I would like to request a new 
link-layer type value.

NETANALYZER_NG

The new Link-Layer-Type format is described as following:

Next-generation packet structure:
+---+
|   Payload |
.   .
.   .
|   |
+---+
|   Footer  |
|   |
+---+

Next-gen footer description:

[16 bit]  Versionrepresents current structure version
[64 bit]  Timestamp1 first timestamp in ns, UNIX time since 1.1.1970
[64 bit]  Timestamp2 second timestamp in ns, UNIX time since 1.1.1970
[32 bit]  TimestampAccuracy  actual accuracy of Timestamp1 and Timestamp2 in 
ns. 0: actual accuracy is unknown
[8 bit]   Representation identification of the following content
[32 bit]  SrcIdPart1 source identifier part 1
[32 bit]  SrcIdPart2 source identifier part 2
[8 bit]   SrcIdPart3 source identifier part 3
[8 bit]   SrcIdPart4 source identifier part 3
[64 bit]  VarId  variable identifier
[64 bit]  VarState   variable error states, depending on representation
[8 bit]   VarTypevariable data type
[32 bit]  VarSizesize of raw frame payload



Regards Jan Adam



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