source: ogAgent-Git/src/opengnsys/oglive/operations.py @ bb1ff4d

# -*- coding: utf-8 -*-
#
# Copyright (c) 2014 Virtual Cable S.L.
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# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
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#      this list of conditions and the following disclaimer.
#    * Redistributions in binary form must reproduce the above copyright notice,
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#      may be used to endorse or promote products derived from this software
#      without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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"""
@author: Ramón M. Gómez, ramongomez at us dot es
"""
from __future__ import unicode_literals

import socket
import platform
import fcntl
import subprocess
import struct
import array
import six
from opengnsys import utils


def _getMacAddr(ifname):
    """
    Returns the mac address of an interface
    Mac is returned as unicode utf-8 encoded
    """
    if isinstance(ifname, list):
        return dict([(name, _getMacAddr(name)) for name in ifname])
    if isinstance(ifname, six.text_type):
        ifname = ifname.encode('utf-8')  # If unicode, convert to bytes (or str in python 2.7)
    try:
        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
        info = bytearray(fcntl.ioctl(s.fileno(), 0x8927, struct.pack(str('256s'), ifname[:15])))
        return six.text_type(''.join(['%02x:' % char for char in info[18:24]])[:-1])
    except Exception:
        return None


def _getIpAddr(ifname):
    """
    Returns the ip address of an interface
    Ip is returned as unicode utf-8 encoded
    """
    if isinstance(ifname, list):
        return dict([(name, _getIpAddr(name)) for name in ifname])
    if isinstance(ifname, six.text_type):
        ifname = ifname.encode('utf-8')  # If unicode, convert to bytes (or str in python 2.7)
    try:
        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
        return six.text_type(socket.inet_ntoa(fcntl.ioctl(
            s.fileno(),
            0x8915,  # SIOCGIFADDR
            struct.pack(str('256s'), ifname[:15])
        )[20:24]))
    except Exception:
        return None


def _getInterfaces():
    """
    Returns a list of interfaces names coded in utf-8
    """
    max_possible = 128  # arbitrary. raise if needed.
    space = max_possible * 16
    if platform.architecture()[0] == '32bit':
        offset, length = 32, 32
    elif platform.architecture()[0] == '64bit':
        offset, length = 16, 40
    else:
        raise OSError('Unknown arquitecture {0}'.format(platform.architecture()[0]))

    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    names = array.array(str('B'), b'\0' * space)
    outbytes = struct.unpack(str('iL'), fcntl.ioctl(
        s.fileno(),
        0x8912,  # SIOCGIFCONF
        struct.pack(str('iL'), space, names.buffer_info()[0])
    ))[0]
    namestr = names.tostring()
    # return namestr, outbytes
    return [namestr[i:i + offset].split(b'\0', 1)[0].decode('utf-8') for i in range(0, outbytes, length)]


def _getIpAndMac(ifname):
    ip, mac = _getIpAddr(ifname), _getMacAddr(ifname)
    return ip, mac


def _exec_ogcommand(ogcmd):
    """
    Loads OpenGnsys environment variables, executes the command and returns the result
    """
    ret = subprocess.check_output(ogcmd, shell=True)
    return ret


def getComputerName():
    """
    Returns computer name, with no domain
    """
    return socket.gethostname().split('.')[0]


def getNetworkInfo():
    """
    Obtains a list of network interfaces
    :return: A "generator" of elements, that are dict-as-object, with this elements:
      name: Name of the interface
      mac: mac of the interface
      ip: ip of the interface
    """
    for ifname in _getInterfaces():
        ip, mac = _getIpAndMac(ifname)
        if mac != '00:00:00:00:00:00':  # Skips local interfaces
            yield utils.Bunch(name=ifname, mac=mac, ip=ip)


def getDomainName():
    return ''


def get_oglive_version():
    """
    Returns ogLive Kernel version and architecture
    :return: kernel version
    """
    kv = platform.os.uname()
    return kv[2] + ', ' + kv[4]


def reboot():
    """
    Simple reboot using OpenGnsys script
    """
    # Workaround for dummy thread
    if six.PY3 is False:
        import threading
        threading._DummyThread._Thread__stop = lambda x: 42

    _exec_ogcommand('/opt/opengnsys/scripts/reboot')


def poweroff():
    """
    Simple poweroff using OpenGnsys script
    """
    # Workaround for dummy thread
    if six.PY3 is False:
        import threading
        threading._DummyThread._Thread__stop = lambda x: 42

    _exec_ogcommand('/opt/opengnsys/scripts/poweroff')


def get_disk_config():
    """
    Returns disk configuration
    Warning: this operation may take some time
    """
    try:
        _exec_ogcommand('/opt/opengnsys/interfaceAdm/getConfiguration')
        # Returns content of configuration file
        cfgdata = open('/tmp/getconfig', 'r').read().strip()
    except IOError:
        cfgdata = ''
    return cfgdata