allow peers without port

The default port is then used

contrib/epee/include/string_tools.h

@@ -350,19 +350,24 @@ POP_WARNINGS
   {
     //parse ip and address
     std::string::size_type p = addres.find(':');
+    std::string ip_str, port_str;
     if(p == std::string::npos)
     {
-      return false;
+      port = 0;
+      ip_str = addres;
+    }
+    else
+    {
+      ip_str = addres.substr(0, p);
+      port_str = addres.substr(p+1, addres.size());
     }
-    std::string ip_str = addres.substr(0, p);
-    std::string port_str = addres.substr(p+1, addres.size());
 
     if(!get_ip_int32_from_string(ip, ip_str))
     {
       return false;
     }
 
-    if(!get_xtype_from_string(port, port_str))
+    if(p != std::string::npos && !get_xtype_from_string(port, port_str))
     {
       return false;
     }

src/p2p/net_node.inl

@@ -262,6 +262,8 @@ namespace nodetool
         pe.id = crypto::rand<uint64_t>();
         bool r = parse_peer_from_string(pe.adr, pr_str);
         CHECK_AND_ASSERT_MES(r, false, "Failed to parse address from string: " << pr_str);
+        if (pe.adr.port == 0)
+          pe.adr.port = testnet ? ::config::testnet::P2P_DEFAULT_PORT : ::config::P2P_DEFAULT_PORT;
         m_command_line_peers.push_back(pe);
       }
     }
@@ -1505,12 +1507,15 @@ namespace nodetool
   bool node_server<t_payload_net_handler>::parse_peers_and_add_to_container(const boost::program_options::variables_map& vm, const command_line::arg_descriptor<std::vector<std::string> > & arg, Container& container)
   {
     std::vector<std::string> perrs = command_line::get_arg(vm, arg);
+    bool testnet = command_line::get_arg(vm, command_line::arg_testnet_on);
 
     for(const std::string& pr_str: perrs)
     {
       nodetool::net_address na = AUTO_VAL_INIT(na);
       bool r = parse_peer_from_string(na, pr_str);
       CHECK_AND_ASSERT_MES(r, false, "Failed to parse address from string: " << pr_str);
+      if (na.port == 0)
+        na.port = testnet ? ::config::testnet::P2P_DEFAULT_PORT : ::config::P2P_DEFAULT_PORT;
       container.push_back(na);
     }