tor-browser

The Tor Browser
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stunserver.h (3788B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
      5 * You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 // Original author: ekr@rtfm.com
      8 
      9 #ifndef stunserver_h__
     10 #define stunserver_h__
     11 
     12 #include <map>
     13 #include <string>
     14 
     15 #include "mozilla/UniquePtr.h"
     16 #include "nsError.h"
     17 
     18 typedef struct nr_stun_server_ctx_ nr_stun_server_ctx;
     19 typedef struct nr_socket_ nr_socket;
     20 typedef struct nr_local_addr_ nr_local_addr;
     21 
     22 namespace mozilla {
     23 
     24 class TestStunServer {
     25 public:
     26  // Generally, you should only call API in this class from the same thread that
     27  // the initial |GetInstance| call was made from.
     28  static TestStunServer* GetInstance(int address_family = AF_INET);
     29  static void ShutdownInstance();
     30  // |ConfigurePort| will only have an effect if called before the first call
     31  // to |GetInstance| (possibly following a |ShutdownInstance| call)
     32  static void ConfigurePort(uint16_t port);
     33  // AF_INET, AF_INET6
     34  static UniquePtr<TestStunServer> Create(int address_family);
     35 
     36  virtual ~TestStunServer();
     37 
     38  void SetActive(bool active);
     39  void SetDelay(uint32_t delay_ms);
     40  void SetDropInitialPackets(uint32_t count);
     41  const std::string& addr() const { return listen_addr_; }
     42  uint16_t port() const { return listen_port_; }
     43 
     44  // These should only be called from the same thread as the initial
     45  // |GetInstance| call.
     46  nsresult SetResponseAddr(nr_transport_addr* addr);
     47  nsresult SetResponseAddr(const std::string& addr, uint16_t port);
     48 
     49  void Reset();
     50 
     51  static const size_t max_stun_message_size = 4096;
     52 
     53  virtual nr_socket* GetReceivingSocket(NR_SOCKET s);
     54  virtual nr_socket* GetSendingSocket(nr_socket* sock);
     55 
     56 protected:
     57  TestStunServer()
     58      : listen_port_(0),
     59        listen_sock_(nullptr),
     60        send_sock_(nullptr),
     61        stun_server_(nullptr),
     62        active_(true),
     63        delay_ms_(0),
     64        initial_ct_(0),
     65        response_addr_(nullptr),
     66        timer_handle_(nullptr) {}
     67 
     68  int SetInternalPort(nr_local_addr* addr, uint16_t port);
     69  int Initialize(int address_family);
     70 
     71  static void readable_cb(NR_SOCKET sock, int how, void* cb_arg);
     72 
     73 private:
     74  void Process(const uint8_t* msg, size_t len, nr_transport_addr* addr_in,
     75               nr_socket* sock);
     76  virtual int TryOpenListenSocket(nr_local_addr* addr, uint16_t port);
     77  static void process_cb(NR_SOCKET sock, int how, void* cb_arg);
     78 
     79 protected:
     80  std::string listen_addr_;
     81  uint16_t listen_port_;
     82  nr_socket* listen_sock_;
     83  nr_socket* send_sock_;
     84  nr_stun_server_ctx* stun_server_;
     85 
     86 private:
     87  bool active_;
     88  uint32_t delay_ms_;
     89  uint32_t initial_ct_;
     90  nr_transport_addr* response_addr_;
     91  void* timer_handle_;
     92  std::map<std::string, uint32_t> received_ct_;
     93 
     94  static TestStunServer* instance;
     95  static TestStunServer* instance6;
     96  static uint16_t instance_port;
     97 };
     98 
     99 class TestStunTcpServer : public TestStunServer {
    100 public:
    101  static TestStunTcpServer* GetInstance(int address_family);
    102  static void ShutdownInstance();
    103  static void ConfigurePort(uint16_t port);
    104  virtual ~TestStunTcpServer();
    105 
    106  virtual nr_socket* GetReceivingSocket(NR_SOCKET s);
    107  virtual nr_socket* GetSendingSocket(nr_socket* sock);
    108 
    109 protected:
    110  TestStunTcpServer() = default;
    111  static void accept_cb(NR_SOCKET sock, int how, void* cb_arg);
    112 
    113 private:
    114  virtual int TryOpenListenSocket(nr_local_addr* addr, uint16_t port);
    115  static UniquePtr<TestStunTcpServer> Create(int address_family);
    116 
    117  static TestStunTcpServer* instance;
    118  static TestStunTcpServer* instance6;
    119  static uint16_t instance_port;
    120 
    121  std::map<NR_SOCKET, nr_socket*> connections_;
    122 };
    123 }  // End of namespace mozilla
    124 #endif