:tocdepth: 3

base/utils/site.zeek
====================
.. zeek:namespace:: Site

Definitions describing a site - which networks and DNS zones are "local"
and "neighbors", and servers running particular services.

:Namespace: Site
:Imports: :doc:`base/utils/patterns.zeek </scripts/base/utils/patterns.zeek>`

Summary
~~~~~~~
Runtime Options
###############
============================================================================ ======================================================================
:zeek:id:`Site::local_admins`: :zeek:type:`table` :zeek:attr:`&redef`        If local network administrators are known and they have responsibility
                                                                             for defined address space, then a mapping can be defined here between
                                                                             networks for which they have responsibility and a set of email
                                                                             addresses.
:zeek:id:`Site::local_nets`: :zeek:type:`set` :zeek:attr:`&redef`            Networks that are considered "local".
:zeek:id:`Site::local_zones`: :zeek:type:`set` :zeek:attr:`&redef`           DNS zones that are considered "local".
:zeek:id:`Site::neighbor_nets`: :zeek:type:`set` :zeek:attr:`&redef`         Networks that are considered "neighbors".
:zeek:id:`Site::neighbor_zones`: :zeek:type:`set` :zeek:attr:`&redef`        DNS zones that are considered "neighbors".
:zeek:id:`Site::private_address_space`: :zeek:type:`set` :zeek:attr:`&redef` A list of subnets that are considered private address space.
============================================================================ ======================================================================

State Variables
###############
===================================================== =====================================================================
:zeek:id:`Site::local_nets_table`: :zeek:type:`table` This is used for retrieving the subnet when using multiple entries in
                                                      :zeek:id:`Site::local_nets`.
===================================================== =====================================================================

Functions
#########
======================================================== =================================================================
:zeek:id:`Site::get_emails`: :zeek:type:`function`       Function that returns a comma-separated list of email addresses
                                                         that are considered administrators for the IP address provided as
                                                         an argument.
:zeek:id:`Site::is_local_addr`: :zeek:type:`function`    Function that returns true if an address corresponds to one of
                                                         the local networks, false if not.
:zeek:id:`Site::is_local_name`: :zeek:type:`function`    Function that returns true if a host name is within a local
                                                         DNS zone.
:zeek:id:`Site::is_neighbor_addr`: :zeek:type:`function` Function that returns true if an address corresponds to one of
                                                         the neighbor networks, false if not.
:zeek:id:`Site::is_neighbor_name`: :zeek:type:`function` Function that returns true if a host name is within a neighbor
                                                         DNS zone.
:zeek:id:`Site::is_private_addr`: :zeek:type:`function`  Function that returns true if an address corresponds to one of
                                                         the private/unrouted networks, false if not.
======================================================== =================================================================


Detailed Interface
~~~~~~~~~~~~~~~~~~
Runtime Options
###############
.. zeek:id:: Site::local_admins
   :source-code: base/utils/site.zeek 124 124

   :Type: :zeek:type:`table` [:zeek:type:`subnet`] of :zeek:type:`set` [:zeek:type:`string`]
   :Attributes: :zeek:attr:`&redef`
   :Default: ``{}``

   If local network administrators are known and they have responsibility
   for defined address space, then a mapping can be defined here between
   networks for which they have responsibility and a set of email
   addresses.

.. zeek:id:: Site::local_nets
   :source-code: base/utils/site.zeek 108 108

   :Type: :zeek:type:`set` [:zeek:type:`subnet`]
   :Attributes: :zeek:attr:`&redef`
   :Default: ``{}``

   Networks that are considered "local".  Note that ZeekControl sets
   this automatically.

.. zeek:id:: Site::local_zones
   :source-code: base/utils/site.zeek 127 127

   :Type: :zeek:type:`set` [:zeek:type:`string`]
   :Attributes: :zeek:attr:`&redef`
   :Default: ``{}``

   DNS zones that are considered "local".

.. zeek:id:: Site::neighbor_nets
   :source-code: base/utils/site.zeek 118 118

   :Type: :zeek:type:`set` [:zeek:type:`subnet`]
   :Attributes: :zeek:attr:`&redef`
   :Default: ``{}``

   Networks that are considered "neighbors".

.. zeek:id:: Site::neighbor_zones
   :source-code: base/utils/site.zeek 130 130

   :Type: :zeek:type:`set` [:zeek:type:`string`]
   :Attributes: :zeek:attr:`&redef`
   :Default: ``{}``

   DNS zones that are considered "neighbors".

.. zeek:id:: Site::private_address_space
   :source-code: base/utils/site.zeek 14 14

   :Type: :zeek:type:`set` [:zeek:type:`subnet`]
   :Attributes: :zeek:attr:`&redef`
   :Default:

      ::

         {
            64:ff9b:1::/48,
            198.18.0.0/15,
            fc00::/7,
            100.64.0.0/10,
            ::/128,
            2002:ffff:ffff::/48,
            ::1/128,
            2002:cb00:7100::/40,
            240.0.0.0/4,
            2002:c633:6400::/40,
            2002:a00::/24,
            100::/64,
            255.255.255.255/32,
            192.0.0.0/24,
            0.0.0.0/8,
            2001:2::/48,
            2002:c000:200::/40,
            172.16.0.0/12,
            2002:f000::/20,
            2002:7f00::/24,
            2001::/23,
            2002:6440::/26,
            2002:c000::/40,
            10.0.0.0/8,
            127.0.0.0/8,
            192.0.2.0/24,
            2002:a9fe::/32,
            192.168.0.0/16,
            2002:ac10::/28,
            169.254.0.0/16,
            2002:c612::/31,
            2002::/24,
            fe80::/10,
            2001:db8::/32,
            203.0.113.0/24,
            2002:c0a8::/32,
            198.51.100.0/24
         }


   A list of subnets that are considered private address space.
   
   By default, it has address blocks defined by IANA as not being routable over the Internet.
   
   See the `IPv4 Special-Purpose Address Registry <https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml>`_
   and the `IPv6 Special-Purpose Address Registry <https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml>`_

State Variables
###############
.. zeek:id:: Site::local_nets_table
   :source-code: base/utils/site.zeek 115 115

   :Type: :zeek:type:`table` [:zeek:type:`subnet`] of :zeek:type:`subnet`
   :Default: ``{}``

   This is used for retrieving the subnet when using multiple entries in
   :zeek:id:`Site::local_nets`.  It's populated automatically from there.
   A membership query can be done with an
   :zeek:type:`addr` and the table will yield the subnet it was found
   within.

Functions
#########
.. zeek:id:: Site::get_emails
   :source-code: base/utils/site.zeek 232 235

   :Type: :zeek:type:`function` (a: :zeek:type:`addr`) : :zeek:type:`string`

   Function that returns a comma-separated list of email addresses
   that are considered administrators for the IP address provided as
   an argument.
   The function inspects :zeek:id:`Site::local_admins`.

.. zeek:id:: Site::is_local_addr
   :source-code: base/utils/site.zeek 169 172

   :Type: :zeek:type:`function` (a: :zeek:type:`addr`) : :zeek:type:`bool`

   Function that returns true if an address corresponds to one of
   the local networks, false if not.
   The function inspects :zeek:id:`Site::local_nets`.

.. zeek:id:: Site::is_local_name
   :source-code: base/utils/site.zeek 184 187

   :Type: :zeek:type:`function` (name: :zeek:type:`string`) : :zeek:type:`bool`

   Function that returns true if a host name is within a local
   DNS zone.
   The function inspects :zeek:id:`Site::local_zones`.

.. zeek:id:: Site::is_neighbor_addr
   :source-code: base/utils/site.zeek 174 177

   :Type: :zeek:type:`function` (a: :zeek:type:`addr`) : :zeek:type:`bool`

   Function that returns true if an address corresponds to one of
   the neighbor networks, false if not.
   The function inspects :zeek:id:`Site::neighbor_nets`.

.. zeek:id:: Site::is_neighbor_name
   :source-code: base/utils/site.zeek 189 192

   :Type: :zeek:type:`function` (name: :zeek:type:`string`) : :zeek:type:`bool`

   Function that returns true if a host name is within a neighbor
   DNS zone.
   The function inspects :zeek:id:`Site::neighbor_zones`.

.. zeek:id:: Site::is_private_addr
   :source-code: base/utils/site.zeek 179 182

   :Type: :zeek:type:`function` (a: :zeek:type:`addr`) : :zeek:type:`bool`

   Function that returns true if an address corresponds to one of
   the private/unrouted networks, false if not.
   The function inspects :zeek:id:`Site::private_address_space`.


