Move DNS seeds resolution to helper_startup

src/helper_startup.py

@@ -390,3 +390,18 @@ def start_proxyconfig():
             logger.info(
                 'Started proxy config plugin %s in %s sec',
                 proxy_type, time.time() - proxyconfig_start)
+
+
+def enumerate_bootstrap_servers():
+    """Generator of (IP, port) pairs resolved from dns seeds"""
+    for port in [8080, 8444]:
+        for item in socket.getaddrinfo(
+            'bootstrap%s.bitmessage.org' % port, port, type=socket.SOCK_STREAM
+        ):
+            try:
+                peer = item[4]
+                socket.inet_aton(peer[0])
+            except (TypeError, socket.error):
+                continue
+            else:
+                yield peer[:2]

src/tests/core.py

@@ -25,6 +25,7 @@ import helper_addressbook
 from bmconfigparser import BMConfigParser
 from helper_msgcoding import MsgEncode, MsgDecode
 from helper_sql import sqlQuery
+from helper_startup import enumerate_bootstrap_servers
 from network import asyncore_pollchoose as asyncore, knownnodes
 from network.bmproto import BMProto
 from network.connectionpool import BMConnectionPool
@@ -237,16 +238,8 @@ class TestCore(unittest.TestCase):
     def test_connection(self):
         """test connection to bootstrap servers"""
         self._initiate_bootstrap()
-        for port in [8080, 8444]:
-            for item in socket.getaddrinfo(
-                    'bootstrap%s.bitmessage.org' % port, 80):
-                try:
-                    addr = item[4][0]
-                    socket.inet_aton(item[4][0])
-                except (TypeError, socket.error):
-                    continue
-                else:
-                    knownnodes.addKnownNode(1, Peer(addr, port))
+        for peer in enumerate_bootstrap_servers():
+            knownnodes.addKnownNode(1, Peer(*peer))
         self._check_connection(True)
 
     def test_bootstrap(self):