###
# Copyright (c) 2003-2005, Jeremiah Fincher
# Copyright (c) 2010-2011, James McCoy
# Copyright (c) 2010-2021, Valentin Lorentz
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#   * Redistributions of source code must retain the above copyright notice,
#     this list of conditions, and the following disclaimer.
#   * Redistributions in binary form must reproduce the above copyright notice,
#     this list of conditions, and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#   * Neither the name of the author of this software nor the name of
#     contributors to this software may be used to endorse or promote products
#     derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###

import time
import socket
import telnetlib

import supybot.conf as conf
import supybot.utils as utils
from supybot.commands import *
from supybot.utils.iter import any
import supybot.callbacks as callbacks
from supybot.i18n import PluginInternationalization, internationalizeDocstring
_ = PluginInternationalization('Internet')

class Internet(callbacks.Plugin):
    """Provides commands to query DNS, search WHOIS databases,
    and convert IPs to hex."""
    threaded = True
    @internationalizeDocstring
    def dns(self, irc, msg, args, host):
        """<host|ip>

        Returns the ip of <host> or the reverse DNS hostname of <ip>.
        """
        if utils.net.isIP(host):
            hostname = socket.getfqdn(host)
            if hostname == host:
                irc.reply(_('Host not found.'))
            else:
                irc.reply(hostname)
        else:
            try:
                ips = socket.getaddrinfo(host, None)
                ips = map(lambda x:x[4][0], ips)
                ordered_unique_ips = []
                unique_ips = set()
                for ip in ips:
                    if ip not in unique_ips:
                        ordered_unique_ips.append(ip)
                        unique_ips.add(ip)
                irc.reply(format('%L', ordered_unique_ips))
            except socket.error:
                irc.reply(_('Host not found.'))
    dns = wrap(dns, ['something'])

    _domain = ['Domain Name', 'Server Name', 'domain']
    _netrange = ['NetRange', 'inetnum']
    _registrar = ['Sponsoring Registrar', 'Registrar', 'source']
    _netname = ['NetName', 'inetname']
    _updated = ['Last Updated On', 'Domain Last Updated Date', 'Updated Date',
                'Last Modified', 'changed', 'last-modified']
    _created = ['Created On', 'Domain Registration Date', 'Creation Date',
                'created', 'RegDate']
    _expires = ['Expiration Date', 'Domain Expiration Date']
    _status = ['Status', 'Domain Status', 'status']
    @internationalizeDocstring
    def whois(self, irc, msg, args, domain):
        """<domain>

        Returns WHOIS information on the registration of <domain>.
        """
        if utils.net.isIP(domain):
            whois_server = 'whois.arin.net'
            usertld = 'ipaddress'
        elif '.' in domain:
            usertld = domain.split('.')[-1]
            whois_server = '%s.whois-servers.net' % usertld
        else:
            usertld = None
            whois_server = 'whois.iana.org'
        try:
            sock = utils.net.getSocket(whois_server,
                    vhost=conf.supybot.protocols.irc.vhost(),
                    vhostv6=conf.supybot.protocols.irc.vhostv6(),
                    )
            sock.connect((whois_server, 43))
        except socket.error as e:
            irc.error(str(e))
            return
        sock.settimeout(5)
        if usertld == 'com':
            sock.send(b'=')
        elif usertld == 'ipaddress':
            sock.send(b'n + ')
        sock.send(domain.encode('ascii'))
        sock.send(b'\r\n')

        s = b''
        end_time = time.time() + 5
        try:
            while end_time>time.time():
                time.sleep(0.1)
                s += sock.recv(4096)
        except socket.error:
            pass
        sock.close()
        server = netrange = netname = registrar = updated = created = expires = status = ''
        for line in s.splitlines():
            line = line.decode('utf8').strip()
            if not line or ':' not in line:
                continue
            if not server and any(line.startswith, self._domain):
                server = ':'.join(line.split(':')[1:]).strip().lower()
                # Let's add this check so that we don't respond with info for
                # a different domain. E.g., doing a whois for microsoft.com
                # and replying with the info for microsoft.com.wanadoodoo.com
                if server != domain:
                    server = ''
                    continue
            if not netrange and any(line.startswith, self._netrange):
                netrange = ':'.join(line.split(':')[1:]).strip()
            if not server and not netrange:
                continue
            if not registrar and any(line.startswith, self._registrar):
                registrar = ':'.join(line.split(':')[1:]).strip()
            elif not netname and any(line.startswith, self._netname):
                netname = ':'.join(line.split(':')[1:]).strip()
            elif not updated and any(line.startswith, self._updated):
                s = ':'.join(line.split(':')[1:]).strip()
                updated = _('updated %s') % s
            elif not created and any(line.startswith, self._created):
                s = ':'.join(line.split(':')[1:]).strip()
                created = _('registered %s') % s
            elif not expires and any(line.startswith, self._expires):
                s = ':'.join(line.split(':')[1:]).strip()
                expires = _('expires %s') % s
            elif not status and any(line.startswith, self._status):
                status = ':'.join(line.split(':')[1:]).strip().lower()
        if not status:
            status = 'unknown'
        try:
            t = telnetlib.Telnet('whois.pir.org', 43)
        except socket.error as e:
            irc.error(str(e))
            return
        t.write(b'registrar ')
        t.write(registrar.split('(')[0].strip().encode('ascii'))
        t.write(b'\n')
        s = t.read_all()
        url = ''
        for line in s.splitlines():
            line = line.decode('ascii').strip()
            if not line:
                continue
            if line.startswith('Email'):
                url = _(' <registered at %s>') % line.split('@')[-1]
            elif line.startswith('Registrar Organization:'):
                url = _(' <registered by %s>') % line.split(':')[1].strip()
            elif line == 'Not a valid ID pattern':
                url = ''
        if (server or netrange) and status:
            entity = server or 'Net range %s%s' % \
                    (netrange, ' (%s)' % netname if netname else '')
            info = filter(None, [status, created, updated, expires])
            s = format(_('%s%s is %L.'), entity, url, info)
            irc.reply(s)
        else:
            irc.error(_('I couldn\'t find such a domain.'))
    whois = wrap(whois, ['lowered'])

    @internationalizeDocstring
    def hexip(self, irc, msg, args, ip):
        """<ip>

        Returns the hexadecimal IP for that IP.
        """
        ret = ""
        if utils.net.isIPV4(ip):
            quads = ip.split('.')
            for quad in quads:
                i = int(quad)
                ret += '%02X' % i
        else:
            octets = ip.split(':')
            for octet in octets:
                if octet:
                    i = int(octet, 16)
                    ret += '%04X' % i
                else:
                    missing = (8 - len(octets)) * 4
                    ret += '0' * missing
        irc.reply(ret)
    hexip = wrap(hexip, ['ip'])
Internet = internationalizeDocstring(Internet)

Class = Internet


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