remoting/protocol/network_settings.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef REMOTING_PROTOCOL_NETWORK_SETTINGS_H_
   6 #define REMOTING_PROTOCOL_NETWORK_SETTINGS_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/logging.h"
  12 #include "remoting/protocol/port_range.h"
  13
  14 namespace remoting {
  15 namespace protocol {
  16
  17 struct NetworkSettings {
  18
  19   // When hosts are configured with NAT traversal disabled they will
  20   // typically also limit their P2P ports to this range, so that
  21   // sessions may be blocked or un-blocked via firewall rules.
  22   static const uint16 kDefaultMinPort = 12400;
  23   static const uint16 kDefaultMaxPort = 12409;
  24
  25   enum Flags {
  26     // Don't use STUN or relay servers. Accept incoming P2P connection
  27     // attempts, but don't initiate any. This ensures that the peer is
  28     // on the same network. Note that connection will always fail if
  29     // both ends use this mode.
  30     NAT_TRAVERSAL_DISABLED = 0x0,
  31
  32     // Allow outgoing connections, even when STUN and RELAY are not enabled.
  33     NAT_TRAVERSAL_OUTGOING = 0x1,
  34
  35     // Active NAT traversal using STUN.
  36     NAT_TRAVERSAL_STUN = 0x2,
  37
  38     // Allow the use of relay servers when a direct connection is not available.
  39     NAT_TRAVERSAL_RELAY = 0x4,
  40
  41     // Active NAT traversal using STUN and relay servers.
  42     NAT_TRAVERSAL_FULL = NAT_TRAVERSAL_STUN | NAT_TRAVERSAL_RELAY |
  43         NAT_TRAVERSAL_OUTGOING
  44   };
  45
  46   NetworkSettings() : flags(NAT_TRAVERSAL_DISABLED) {
  47     DCHECK(!(flags & (NAT_TRAVERSAL_STUN | NAT_TRAVERSAL_RELAY)) ||
  48            (flags & NAT_TRAVERSAL_OUTGOING));
  49   }
  50
  51   explicit NetworkSettings(uint32 flags) : flags(flags) {}
  52
  53   uint32 flags;
  54
  55   // Range of ports used by P2P sessions.
  56   PortRange port_range;
  57 };
  58
  59 }  // namespace protocol
  60 }  // namespace remoting
  61
  62 #endif  // REMOTING_HOST_NETWORK_SETTINGS_H_