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 13 namespace remoting { 14 namespace protocol { 15 16 struct NetworkSettings { 17 18 // When hosts are configured with NAT traversal disabled they will 19 // typically also limit their P2P ports to this range, so that 20 // sessions may be blocked or un-blocked via firewall rules. 21 static const int kDefaultMinPort = 12400; 22 static const int kDefaultMaxPort = 12409; 23 24 enum Flags { 25 // Don't use STUN or relay servers. Accept incoming P2P connection 26 // attempts, but don't initiate any. This ensures that the peer is 27 // on the same network. Note that connection will always fail if 28 // both ends use this mode. 29 NAT_TRAVERSAL_DISABLED = 0x0, 30 31 // Allow outgoing connections, even when STUN and RELAY are not enabled. 32 NAT_TRAVERSAL_OUTGOING = 0x1, 33 34 // Active NAT traversal using STUN. 35 NAT_TRAVERSAL_STUN = 0x2, 36 37 // Allow the use of relay servers when a direct connection is not available. 38 NAT_TRAVERSAL_RELAY = 0x4, 39 40 // Active NAT traversal using STUN and relay servers. 41 NAT_TRAVERSAL_FULL = NAT_TRAVERSAL_STUN | NAT_TRAVERSAL_RELAY | 42 NAT_TRAVERSAL_OUTGOING 43 }; 44 45 NetworkSettings() 46 : flags(NAT_TRAVERSAL_DISABLED), 47 min_port(0), 48 max_port(0) { 49 DCHECK(!(flags & (NAT_TRAVERSAL_STUN | NAT_TRAVERSAL_RELAY)) || 50 (flags & NAT_TRAVERSAL_OUTGOING)); 51 } 52 53 explicit NetworkSettings(uint32 flags) 54 : flags(flags), 55 min_port(0), 56 max_port(0) { 57 } 58 59 // Parse string in the form "<min_port>-<max_port>". E.g. "12400-12409". 60 // Returns true if string was parsed successfuly. 61 static bool ParsePortRange(const std::string& port_range, 62 int* out_min_port, 63 int* out_max_port); 64 65 uint32 flags; 66 67 // |min_port| and |max_port| specify range (inclusive) of ports used by 68 // P2P sessions. Any port can be used when both values are set to 0. 69 int min_port; 70 int max_port; 71 }; 72 73 } // namespace protocol 74 } // namespace remoting 75 76 #endif // REMOTING_HOST_NETWORK_SETTINGS_H_ 77
