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30 #include "talk/base/nattypes.h"
34 class SymmetricNAT : public NAT {
36 bool IsSymmetric() { return true; }
37 bool FiltersIP() { return true; }
38 bool FiltersPort() { return true; }
41 class OpenConeNAT : public NAT {
43 bool IsSymmetric() { return false; }
44 bool FiltersIP() { return false; }
45 bool FiltersPort() { return false; }
48 class AddressRestrictedNAT : public NAT {
50 bool IsSymmetric() { return false; }
51 bool FiltersIP() { return true; }
52 bool FiltersPort() { return false; }
55 class PortRestrictedNAT : public NAT {
57 bool IsSymmetric() { return false; }
58 bool FiltersIP() { return true; }
59 bool FiltersPort() { return true; }
62 NAT* NAT::Create(NATType type) {
64 case NAT_OPEN_CONE: return new OpenConeNAT();
65 case NAT_ADDR_RESTRICTED: return new AddressRestrictedNAT();
66 case NAT_PORT_RESTRICTED: return new PortRestrictedNAT();
67 case NAT_SYMMETRIC: return new SymmetricNAT();
68 default: assert(0); return 0;
72 } // namespace talk_base