dnsjit.input.zmmpcap(3)

NAME
dnsjit.input.zmmpcap - Read input from a PCAP file using mmap()

SYNOPSIS
  local input = require("dnsjit.input.zmmpcap").new()
  input:zstd()
  input:open("file.pcap.zst")
  input:receiver(filter_or_output)
  input:run()

DESCRIPTION
Read input from a PCAP file by mapping the whole file to memory using mmap() and parse the PCAP without libpcap. After opening a file and reading the PCAP header, the attributes are populated.

  Attributes

is_swapped
    Indicate if the byte order in the PCAP is in reverse order of the host.

is_nanosec
    Indicate if the time stamps are in nanoseconds or not.

magic_number
    Magic number.

version_major
    Major version number.

version_minor
    Minor version number.

thiszone
    GMT to local correction.

sigfigs
    Accuracy of timestamps.

snaplen
    Max length of captured packets, in octets.

network
    The link type found in the PCAP header, see https://www.tcpdump.org/linktypes.html .

linktype
    The data link type, mapped from network.

  Functions

Zmmpcap.new()
    Create a new Zmmpcap input.

Zmmpcap:log()
    Return the Log object to control logging of this instance or module.

Zmmpcap:receiver(o)
    Set the receiver to pass objects to.

Zmmpcap:produce()
    Return the C functions and context for producing objects.

Zmmpcap:lz4()
    Use liblz4 to decompress the input file/data.

Zmmpcap:zstd()
    Use libzstd to decompress the input file/data.

Zmmpcap:gzip()
    Use zlib/gzip to decompress the input file/data.

Zmmpcap:lzma()
    Use liblzma/xz to decompress the input file/data.

Zmmpcap:have_support()
    Return true if support for selected compression library is built in.

Zmmpcap:open(file)
    Open a PCAP file for processing and read the PCAP header. Returns 0 on success.

Zmmpcap:run()
    Start processing packets and send each packet read to the receiver. Returns 0 if all packets was read successfully.

Zmmpcap:packets()
    Return the number of packets seen.

AUTHORS and CONTRIBUTORS
Jerry Lundström (DNS-OARC), Tomáš Křížek (CZ.NIC), Petr Špaček (ISC)

Maintained by DNS-OARC

    https://www.dns-oarc.net/

BUGS
For issues and feature requests please use:

    https://github.com/DNS-OARC/dnsjit/issues

For question and help please use:

    admin@dns-oarc.net