#==============================================================================
import urllib.request, socket, sys, argparse, os, configparser, itertools, subprocess, re, ssl
+import dns, dns.resolver
VERBOSE_CHANGE = 1
VERBOSE_FULL = 2
def sslContext(config):
- if config['DEFAULT']['ssl_check_cert'].lower() in ('0', 'false', 'no'):
+ if config['DEFAULT'].get('ssl_check_cert', 'yes').lower() in ('0', 'false', 'no'):
context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
return context
else:
return os.path.expanduser("~/.config/dyn-nsupdate")
def urlopen(url, config):
- return urllib.request.urlopen(url, context=sslContext(config)).read().decode('utf-8').strip()
+ if sys.version_info >= (3, 4, 3):
+ return urllib.request.urlopen(url, context=sslContext(config)).read().decode('utf-8').strip('\n')
+ else:
+ return urllib.request.urlopen(url).read().decode('utf-8').strip('\n')
def getMyIP(family, config, methods = {}, verbose = 0):
'''Returns our current IP address (<family> can be "IPv4" or "IPv6"), detected as given by the configuration.
method = config[family]['method']
if method == 'none':
return None
+ elif method == 'remove':
+ return ""
elif method == 'web':
server = config[family].get('server', config['DEFAULT']['server'])
- ip = urlopen('https://'+server+'/checkip', config)
+ url = 'https://'+server+'/checkip'
+ try:
+ ip = urlopen(url, config)
+ except urllib.error.URLError:
+ raise Exception("Error fetching {}, make sure the URL is correct and the internet connection actually works.".format(url))
if verbose >= VERBOSE_FULL:
print("Server",server,"says my",family,"is",ip)
return ip
def getMyIPv6(config, verbose = 0):
'''Returns our current IPv6 address, detected as given by the configuration'''
def local():
- out = subprocess.check_output(["ip", "addr"])
+ device = config["IPv6"].get("device")
+ out = subprocess.check_output(["ip", "addr", "show"] + ([] if device is None else ["dev", device]))
for line in out.decode('utf-8').split('\n'):
m = re.search('inet6 ([a-fA-F0-9:]+)/64 ([a-zA-Z0-9 ]*)', line)
if m is not None:
raise Exception("Unable to detect correct local IPv6 address")
return getMyIP("IPv6", config, methods={'local': local}, verbose=verbose)
-def getCurIP(domain, family):
- '''Return the current IP of the given <domain>. <family> can be socket.AF_INET or socket.AF_INET6.'''
+def getResolver(server):
+ '''Return a resovler with the given server (defined by DNS name)'''
+ addr = socket.getaddrinfo(server, None, family=socket.AF_INET)
+ addr = addr[0][4][0]
+ res = dns.resolver.Resolver()
+ res.nameservers = [addr]
+ return res
+
+def getCurIP(domain, rtype, res):
+ '''Return the current IP of the given <domain>. <rtype> can be A or AAAA.'''
try:
- addr = socket.getaddrinfo(domain, None, family=family)
- return addr[0][4][0]
- except socket.gaierror: # domain not found
+ return res.query(domain, rtype)[0].address
+ except dns.exception.DNSException: # domain not found
return ""
-def getCurIPv4(domain):
- '''Returns the current IPv4 address of the given domain'''
- return getCurIP(domain, socket.AF_INET)
-
-def getCurIPv6(domain):
- '''Returns the current IPv6 address of the given domain'''
- return getCurIP(domain, socket.AF_INET6)
-
def updateDomain(server, domain, ipv4, ipv6, password, config, verbose):
'''Update the given domain, using the server, password. ipv4 or ipv6 can be None to not update that record, or strings with the respective addresses.
Updates ae only performed if necessary.
assert ipv4 is not None or ipv6 is not None
# check what the domain is currently mapped to
- curIPv4 = getCurIPv4(domain)
- curIPv6 = getCurIPv6(domain)
+ res = getResolver(server)
+ if verbose >= VERBOSE_FULL:
+ print("Resolving names using {}".format(res.nameservers))
+ curIPv4 = getCurIP(domain, 'A', res)
+ curIPv6 = getCurIP(domain, 'AAAA', res)
if verbose >= VERBOSE_FULL:
print("Current status of domain {} is: IPv4 address '{}', IPv6 address '{}'".format(domain, curIPv4, curIPv6))
if ipv6 is not None:
url += '&ipv6='+urllib.parse.quote(ipv6)
expected += " "+ipv6
+ if verbose >= VERBOSE_FULL:
+ print("Request:",url)
result = urlopen(url, config)
# did everything go as planned?
if verbose >= VERBOSE_CHANGE:
msg = "Successfully updated domain {} on {}:".format(domain, server)
if ipv4 is not None:
- msg += " IPv4={}".format(ipv4)
+ if curIPv4 == ipv4:
+ msg += " IPv4={} (unchanged)".format(curIPv4)
+ else:
+ msg += " IPv4={} -> {}".format(curIPv4, ipv4)
+ if ipv4 is not None and ipv6 is not None:
+ msg += ","
if ipv6 is not None:
- msg += " IPv6={}".format(ipv6)
+ if curIPv6 == ipv6:
+ msg += " IPv6={} (unchanged)".format(curIPv6)
+ else:
+ msg += " IPv6={} -> {}".format(curIPv6, ipv6)
print(msg)
# all went all right
return True
else:
# Something went wrong
print("Unexpected answer from server",server,"while updating",domain)
- print(result)
+ print("Got '{}', expected '{}'".format(result, expected))
return False
if __name__ == "__main__":
dest="config", default=os.path.join(getConfigDir(), "dyn-ns-client.conf"),
help="The configuration file")
parser.add_argument("-v", "--verbose",
- action="count", dest="verbose",
+ action="count", dest="verbose", default=0,
help="Be more verbose")
args = parser.parse_args()
projects / dyn-nsupdate.git / blobdiff