* Make pcapgo EthernetHandle use runtime poller

This allows pcapgo to cooperate with the Go runtime poller
to not block entire OS thread on operations.

* Use close-on-exec in pcapgo

The close-on-exec flag should always be used, where possible. The Go
standard library does that everywhere, so it makes sense to use it here,
too.

* pcapng: support read and write Enhanced Packet Block (EPB) options

* no longer set LinkLayerErr for the epb.pcapng

Rename "htons" package to "endian". Htons stands for "host to network
short (uint16)". If we ever add helpers for other integer
widths, "htons" for the package name would not fit.

Rewrite Htons itself without unsafe, making the code easier to follow
and helping the compiler generate tighter code.

Signed-off-by: Nick Zavaritsky <mejedi@gmail.com>

original appears to return the reversed results

* feat: support icmp6 option RecursiveDNSServer

* making the consts consistent

---------

Co-authored-by: Ali Mosajjal <hi@n0p.me>

The prior implementation of Htons attempted big endian detection via
comparison of binary.NativeEndian.String() with binary.BigEndian.String().
It turns out that the former always returns "NativeEndian", hence it
didn't work as intended.

Rewrite endian detection by passing []byte{0x12, 0x34} through
Endian.Uint16(). Add test to ensure that detection works both on little
and big endian CPUs.

Bumps [golang.org/x/net](https://github.com/golang/net) from 0.35.0 to 0.36.0.
- [Commits](golang/net@v0.35.0...v0.36.0)

---
updated-dependencies:
- dependency-name: golang.org/x/net
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Adding truncated indication if header section is not complete, and return an error if first line is empty, and tests to tests these scenarios.

Tests have been updated to test for truncated indicator, and test helper-functions are now marked as such.

Before this patch, the Geneve layer would not fully implement
DecodingLayer. This would prevent Geneve to be added as a DecodingLayer
to gopacket.NewDecodingLayerParser():

    cannot use &Geneve{} (value of type *Geneve) as gopacket.DecodingLayer value in argument to gopacket.NewDecodingLayerParser: *Geneve does not implement gopacket.DecodingLayer (missing method CanDecode)

This patch implements (*Geneve).CanDecode() and a test to ensure Geneve
can be used as a DecodingLayer.

Signed-off-by: Alexandre Perrin <alex@isovalent.com>

…mespaces (#116)

* Enable parsing additional RadioTap namespaces and Vendor namespaces

* A few more test checks

GTPv1U has different message types. Data (255) carries nested IPv4, IPv6
or PPP packet.  Other messages such as Echo Request / Response don't.

Check the message type first and only parse payload as IPv4 / IPv6 / PPP
in data PDUs.

…n permissions (#118)

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

* add ability to handle pointers in layerString

* copilot suggestions

* ipsec: implement DecodingLayer

Before this patch, the IPSecAH and IPSecESP layer would not fully implement
DecodingLayer. This would prevent them to be added as a DecodingLayer
to gopacket.NewDecodingLayerParser():

    cannot use &IPSecAH{} (value of type *IPSecAH) as gopacket.DecodingLayer value in argument to gopacket.NewDecodingLayerParser: *IPSecAH does not implement gopacket.DecodingLayer (missing method CanDecode)

This patch implements (*IPSecAH).CanDecode() and (*IPSecESP).CanDecode()
and a test to ensure they can be used as a DecodingLayer.

Signed-off-by: Simone Magnani <simone.magnani@isovalent.com>

* Update layers/ipsec.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Signed-off-by: Simone Magnani <simone.magnani@isovalent.com>
Co-authored-by: Ali <hi@n0p.me>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* add SerializeTo IPv6Routing

Signed-off-by: sat0ken <15720506+sat0ken@users.noreply.github.com>

* add SerializeTo IPv6Routing

Signed-off-by: sat0ken <15720506+sat0ken@users.noreply.github.com>

* Update layers/ip6.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Signed-off-by: sat0ken <15720506+sat0ken@users.noreply.github.com>
Co-authored-by: Ali <hi@n0p.me>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>