p2p: don't lookup seed IPs if using an exclusive peer

src/p2p/net_node.inl

@@ -270,6 +270,7 @@ namespace nodetool
     m_allow_local_ip = command_line::get_arg(vm, arg_p2p_allow_local_ip);
     m_no_igd = command_line::get_arg(vm, arg_no_igd);
     m_offline = command_line::get_arg(vm, cryptonote::arg_offline);
+    m_testnet = command_line::get_arg(vm, cryptonote::arg_testnet_on);
 
     if (command_line::has_arg(vm, arg_p2p_add_peer))
     {
@@ -398,14 +399,16 @@ namespace nodetool
   bool node_server<t_payload_net_handler>::init(const boost::program_options::variables_map& vm)
   {
     std::set<std::string> full_addrs;
-    m_testnet = command_line::get_arg(vm, cryptonote::arg_testnet_on);
+
+    bool res = handle_command_line(vm);
+    CHECK_AND_ASSERT_MES(res, false, "Failed to handle command line");
 
     if (m_testnet)
     {
       memcpy(&m_network_id, &::config::testnet::NETWORK_ID, 16);
       full_addrs = get_seed_nodes(true);
     }
-    else
+    else if (m_exclusive_peers.empty())
     {
       memcpy(&m_network_id, &::config::NETWORK_ID, 16);
       // for each hostname in the seed nodes list, attempt to DNS resolve and
@@ -496,9 +499,6 @@ namespace nodetool
     }
     MDEBUG("Number of seed nodes: " << m_seed_nodes.size());
 
-    bool res = handle_command_line(vm);
-    CHECK_AND_ASSERT_MES(res, false, "Failed to handle command line");
-
     auto config_arg = m_testnet ? cryptonote::arg_testnet_data_dir : cryptonote::arg_data_dir;
     m_config_folder = command_line::get_arg(vm, config_arg);