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#! /usr/bin/python

import dns.query

import dns.message

import dns.resolver

import re,sys

from email import encoders

from email.header import Header

from email.mime.text import MIMEText

from email.utils import parseaddr, formataddr

import smtplib

import os

import socket, fcntl, struct

def get_ip(ifname):

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

return socket.inet_ntoa(fcntl.ioctl(s.fileno(), 0x8915, struct.pack('256s', ifname[:15]))[20:24])

def sendmail():

sender = "[email protected]"

password = "xxxxxxxxx"

smtp_server = "mail.xxx.com"

body = get_ip('eth0')+' YYDNS was down, please check'

msg = MIMEText(body,_subtype='plain',_charset='utf-8')

msg['From'] = "[email protected]"

msg['To'] = "[email protected],[email protected]"

msg['Subject'] = Header("YYDNS down").encode()

server = smtplib.SMTP(smtp_server,25)

#server.set_debuglevel(1)

server.login(sender,password)

server.sendmail(sender,msg['To'].split(","),msg.as_string())

server.quit()

dm = dns.message.make_query('www.qq.com','A')

try:

result = dns.query.udp(dm,'172.26.9.9',timeout=10,port=5553)

except:

sendmail()

#comment = re.compile(r'www.qq.com.\s\d+\sIN\sA\s\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}')

#if not comment.findall(result.to_text()):

# sendmail()