server-tools/base_remote/models/res_remote.py

# Copyright 2018 Creu Blanca
# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
from odoo import api, models, fields
import socket
import logging


class ResRemote(models.Model):
    _name = 'res.remote'
    _description = 'Remotes'

    name = fields.Char(
        required=True,
        string='Hostname',
        index=True,
        readonly=True
    )
    ip = fields.Char(required=True)
    in_network = fields.Boolean(
        required=True,
        help='Shows if the remote can be found through the socket'
    )

    _sql_constraints = [
        ('name_unique', 'unique(name)', 'Hostname must be unique')
    ]

    @api.model
    def _create_vals(self, addr, hostname):
        return {
            'name': hostname or addr,
            'ip': addr,
            'in_network': bool(hostname),
        }

    @api.model
    def _get_remote(self, addr):
        try:
            hostname, alias, ips = socket.gethostbyaddr(addr)
        except socket.herror:
            logging.warning('Remote with ip %s could not be found' % addr)
            hostname = False
        remote = self.search([('name', '=', hostname or addr)])
        if not remote:
            remote = self.create(self._create_vals(addr, hostname))
        if remote.ip != addr:
            # IPs can change through time, but hostname should not change
            remote.write({'ip': addr})
        return remote