Make nodes ask registry for their country

re6st/cache.py

@@ -272,3 +272,9 @@ class Cache(object):
             if a != address:
                 q("INSERT OR REPLACE INTO peer VALUES (?,?)", (prefix, address))
             q("INSERT OR REPLACE INTO volatile.stat VALUES (?,0)", (prefix,))
+
+    def getCountry(self, ip):
+        try:
+            return self._registry.getCountry(self._prefix, ip)
+        except socket.error, e:
+            logging.warning('Failed to get country (%s)', ip)

re6st/cli/node.py

@@ -67,7 +67,7 @@ def getConfig():
              "to access it.")
     _('--country', metavar='CODE',
         help="Country code that is advertised to other nodes"
-             "(default: country is fetched from MaxMind database)")
+             "(default: country is resolved by the registry)")
 
     _ = parser.add_argument_group('routing').add_argument
     _('-B', dest='babel_args', metavar='ARG', action='append', default=[],

re6st/tunnel.py

@@ -213,17 +213,22 @@ class BaseTunnelManager(object):
         address_dict = defaultdict(list)
         for family, address in address:
             address_dict[family] += address
-        if any(address_dict.itervalues()):
-            del cache.my_address
-        else:
-            address = cache.my_address
-            if address:
-                for address in utils.parse_address(address):
+
+        # Cache may contain our country, we want to use it if possible to
+        # prevent interaction with registry
+        cache_address = cache.my_address
+        if cache_address:
+            cache_dict = defaultdict(list)
+            for address in utils.parse_address(cache_address):
                 try:
                     proto = proto_dict[address[2]]
                 except KeyError:
                     continue
-                    address_dict[proto[0]].append(address)
+                cache_dict[proto[0]].append(address)
+            if {proto: cache_dict[proto][:3] for proto in cache_dict
+               } == address_dict:
+                address_dict = cache_dict
+
         db = os.getenv('GEOIP2_MMDB')
         if db:
             from geoip2 import database, errors
@@ -234,6 +239,7 @@ class BaseTunnelManager(object):
                 except errors.AddressNotFoundError:
                     return
             self._geoiplookup = geoiplookup
+        if cache.same_country:
             self._country = {}
 
             address_dict = {family: self._updateCountry(address)
@@ -244,6 +250,7 @@ class BaseTunnelManager(object):
         self._address = {family: utils.dump_address(address)
                          for family, address in address_dict.iteritems()
                          if address}
+        cache.my_address = ';'.join(self._address.itervalues())
 
         self.sock = socket.socket(socket.AF_INET6,
             socket.SOCK_DGRAM | socket.SOCK_CLOEXEC)
@@ -664,7 +671,7 @@ class BaseTunnelManager(object):
             for a in address:
                 family, ip = resolve(*a[:3])
                 for ip in ip:
-                    country = a[3] if len(a) > 3 else self._geoiplookup(ip)
+                    country = a[3] if len(a) > 3 else self.cache.getCountry(ip)
                     if country:
                         if self._country.get(family) != country:
                             self._country[family] = country
@@ -1029,7 +1036,7 @@ class TunnelManager(BaseTunnelManager):
         if self._ip_changed:
             family, address = self._ip_changed(ip)
             if address:
-                if self._geoiplookup or self._conf_country:
+                if self.cache.same_country:
                     address = self._updateCountry(address)
                 self._address[family] = utils.dump_address(address)
                 self.cache.my_address = ';'.join(self._address.itervalues())