# Connection to the core of the program.
self.core = core
+ # Address cache.
+ self.__addresses = {}
+
# Find out on which distribution we are running.
self.distro = self._get_distro_identifier()
logger.debug(_("Running on distribution: %s") % self.distro)
return proxy
- def get_local_ipv6_address(self):
- return # XXX TODO
-
- def get_local_ipv4_address(self):
- if self.distro == "ipfire-2":
+ def get_local_ip_address(self, proto):
+ # Legacy code for IPFire 2.
+ if self.distro == "ipfire-2" and proto == "ipv4":
try:
with open("/var/ipfire/red/local-ipaddress") as f:
return f.readline()
raise
- return # XXX TODO
+ # XXX TODO
+ raise NotImplementedError
def _guess_external_ip_address(self, url, timeout=10):
"""
return match.group(1)
- def guess_external_ipv6_address(self):
- """
- Sends a request to the internet to determine
- the public IPv6 address.
- """
- return self._guess_external_ip_address("http://checkip6.dns.lightningwirelabs.com")
+ def guess_external_ip_address(self, family, **kwargs):
+ if family == "ipv6":
+ url = "http://checkip6.dns.lightningwirelabs.com"
+ elif family == "ipv4":
+ url = "http://checkip4.dns.lightningwirelabs.com"
+ else:
+ raise ValueError("unknown address family")
- def guess_external_ipv4_address(self):
- """
- Sends a request to the internet to determine
- the public IPv4 address.
- """
- return self._guess_external_ip_address("http://checkip4.dns.lightningwirelabs.com")
+ return self._guess_external_ip_address(url, **kwargs)
def send_request(self, url, method="GET", data=None, username=None, password=None, timeout=30):
assert method in ("GET", "POST")
return resp
except urllib2.HTTPError, e:
+ # Log response header.
+ logger.debug(_("Response header (Status Code %s):") % e.code)
+ for k, v in e.hdrs.items():
+ logger.debug(" %s: %s" % (k, v))
+
+ # 400 - Bad request
+ if e.code == 400:
+ raise DDNSRequestError(e.reason)
+
+ # 401 - Authorization Required
+ # 403 - Forbidden
+ elif e.code in (401, 403):
+ raise DDNSAuthenticationError(e.reason)
+
+ # 500 - Internal Server Error
+ elif e.code == 500:
+ raise DDNSInternalServerError(e.reason)
+
# 503 - Service Unavailable
- if e.code == 503:
- raise DDNSServiceUnavailableError
+ elif e.code == 503:
+ raise DDNSServiceUnavailableError(e.reason)
# Raise all other unhandled exceptions.
raise
# Network Unreachable (e.g. no IPv6 access)
if e.reason.errno == 101:
raise DDNSNetworkUnreachableError
+
+ # Connection Refused
elif e.reason.errno == 111:
raise DDNSConnectionRefusedError
return authstring
def get_address(self, proto):
+ """
+ Returns the current IP address for
+ the given IP protocol.
+ """
+ try:
+ return self.__addresses[proto]
+
+ # IP is currently unknown and needs to be retrieved.
+ except KeyError:
+ self.__addresses[proto] = address = \
+ self._get_address(proto)
+
+ return address
+
+ def _get_address(self, proto):
assert proto in ("ipv6", "ipv4")
# IPFire 2 does not support IPv6.
# Check if the external IP address should be guessed from
# a remote server.
guess_ip = self.core.settings.get("guess_external_ip", "true")
+ guess_ip = guess_ip in ("true", "yes", "1")
- # If the external IP address should be used, we just do
- # that.
- if guess_ip in ("true", "yes", "1"):
- if proto == "ipv6":
- return self.guess_external_ipv6_address()
+ # If the external IP address should be used, we just do that.
+ if guess_ip:
+ return self.guess_external_ip_address(proto)
- elif proto == "ipv4":
- return self.guess_external_ipv4_address()
+ # Get the local IP address.
+ local_ip_address = self.get_local_ip_address(proto)
- # Get the local IP addresses.
- else:
- if proto == "ipv6":
- return self.get_local_ipv6_address()
- elif proto == "ipv4":
- return self.get_local_ipv4_address()
+ # If the local IP address is not usable, we must guess
+ # the correct IP address...
+ if not self._is_usable_ip_address(proto, local_ip_address):
+ local_ip_address = self.guess_external_ip_address(proto)
+
+ return local_ip_address
+
+ def _is_usable_ip_address(self, proto, address):
+ """
+ Returns True is the local IP address is usable
+ for dynamic DNS (i.e. is not a RFC1918 address or similar).
+ """
+ if proto == "ipv4":
+ # This is not the most perfect solution to match
+ # these addresses, but instead of pulling in an entire
+ # library to handle the IP addresses better, we match
+ # with regular expressions instead.
+ matches = (
+ # RFC1918 address space
+ r"^10\.\d+\.\d+\.\d+$",
+ r"^192\.168\.\d+\.\d+$",
+ r"^172\.(1[6-9]|2[0-9]|31)\.\d+\.\d+$",
+
+ # Dual Stack Lite address space
+ r"^100\.(6[4-9]|[7-9][0-9]|1[01][0-9]|12[0-7])\.\d+\.\d+$",
+ )
+
+ for match in matches:
+ m = re.match(match, address)
+ if m is None:
+ continue
+
+ # Found a match. IP address is not usable.
+ return False
+
+ # In all other cases, return OK.
+ return True
def resolve(self, hostname, proto=None):
addresses = []
projects / oddments / ddns.git / blobdiff