vpn-manager: accept a hostname for remote host

l2tpipsec_vpn.cc

 // Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <poll.h>
 #include <signal.h>
 #include <stddef.h>
 #include <sys/wait.h>
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/scoped_temp_dir.h"
 #include "chromeos/process.h"
 #include "chromeos/syslog_logging.h"
 #include "gflags/gflags.h"
 #include "vpn-manager/ipsec_manager.h"
 #include "vpn-manager/l2tp_manager.h"
 
 #pragma GCC diagnostic ignored "-Wstrict-aliasing"
 DEFINE_string(client_cert_file, "", "File with IPsec client certificate");
 DEFINE_string(client_key_file, "", "File with IPsec client private key");
 DEFINE_string(psk_file, "", "File with IPsec pre-shared key");
-DEFINE_string(remote_address, "", "VPN server address");
+DEFINE_string(remote_host, "", "VPN server hostname");
 DEFINE_string(server_ca_file, "", "File with IPsec server CA");
 #pragma GCC diagnostic error "-Wstrict-aliasing"
 
 // True if a signal has requested termination.
 static bool s_terminate_request = false;
 
 void HandleSignal(int sig_num) {
   LOG(INFO) << "Caught signal " << sig_num;
   switch(sig_num) {
     case SIGTERM:
@@ skipping 68 matching lines @@
   chromeos::InitLog(log_flags);
   chromeos::OpenLog("l2tpipsec_vpn", true);
   IpsecManager ipsec;
   L2tpManager l2tp;
 
   LockDownUmask();
 
   ServiceManager::InitializeDirectories(&temp_dir);
 
   if (!ipsec.Initialize(1,
-                        FLAGS_remote_address,
+                        FLAGS_remote_host,
                         FLAGS_psk_file,
                         FLAGS_server_ca_file,
                         FLAGS_client_key_file,
                         FLAGS_client_cert_file)) {
     return 1;
   }
-  if (!l2tp.Initialize(FLAGS_remote_address)) {
+  if (!l2tp.Initialize(FLAGS_remote_host)) {
     return 1;
   }
   ServiceManager::SetLayerOrder(&ipsec, &l2tp);
 
   InstallSignalHandlers();
   CHECK(ipsec.Start()) << "Unable to start IPsec layer";
 
   RunEventLoop(&ipsec, &l2tp);
 
   LOG(INFO) << "Shutting down...";
   l2tp.Stop();
   return 0;
 }