Assign addresses on proxy nets before finding one

Author: hartmans

carthage_base/proxy.py

@@ -573,6 +573,8 @@ async def proxy_address(self, server:ProxyProtocol):
         '''
         Returns the address at which the proxy should contact this proxy service.
         '''
+        for net in set(l.net for l in self.network_links.values()):
+            net.assign_addresses()
         for links in shared_network_links(self.network_links, server.network_links):
             if address := links[0].merged_v4_config.address:
                 return address