Home | History | Annotate | Download | only in base 
      1 /*
      2  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #ifndef WEBRTC_BASE_FIREWALLSOCKETSERVER_H_
     12 #define WEBRTC_BASE_FIREWALLSOCKETSERVER_H_
     13 
     14 #include <vector>
     15 #include "webrtc/base/socketserver.h"
     16 #include "webrtc/base/criticalsection.h"
     17 
     18 namespace rtc {
     19 
     20 class FirewallManager;
     21 
     22 // This SocketServer shim simulates a rule-based firewall server.
     23 
     24 enum FirewallProtocol { FP_UDP, FP_TCP, FP_ANY };
     25 enum FirewallDirection { FD_IN, FD_OUT, FD_ANY };
     26 
     27 class FirewallSocketServer : public SocketServer {
     28  public:
     29   FirewallSocketServer(SocketServer * server,
     30                        FirewallManager * manager = NULL,
     31                        bool should_delete_server = false);
     32   ~FirewallSocketServer() override;
     33 
     34   SocketServer* socketserver() const { return server_; }
     35   void set_socketserver(SocketServer* server) {
     36     if (server_ && should_delete_server_) {
     37       delete server_;
     38       server_ = NULL;
     39       should_delete_server_ = false;
     40     }
     41     server_ = server;
     42   }
     43 
     44   // Settings to control whether CreateSocket or Socket::Listen succeed.
     45   void set_udp_sockets_enabled(bool enabled) { udp_sockets_enabled_ = enabled; }
     46   void set_tcp_sockets_enabled(bool enabled) { tcp_sockets_enabled_ = enabled; }
     47   bool tcp_listen_enabled() const { return tcp_listen_enabled_; }
     48   void set_tcp_listen_enabled(bool enabled) { tcp_listen_enabled_ = enabled; }
     49 
     50   // Rules govern the behavior of Connect/Accept/Send/Recv attempts.
     51   void AddRule(bool allow, FirewallProtocol p = FP_ANY,
     52                FirewallDirection d = FD_ANY,
     53                const SocketAddress& addr = SocketAddress());
     54   void AddRule(bool allow, FirewallProtocol p,
     55                const SocketAddress& src, const SocketAddress& dst);
     56   void ClearRules();
     57 
     58   bool Check(FirewallProtocol p,
     59              const SocketAddress& src, const SocketAddress& dst);
     60 
     61   Socket* CreateSocket(int type) override;
     62   Socket* CreateSocket(int family, int type) override;
     63 
     64   AsyncSocket* CreateAsyncSocket(int type) override;
     65   AsyncSocket* CreateAsyncSocket(int family, int type) override;
     66 
     67   void SetMessageQueue(MessageQueue* queue) override;
     68   bool Wait(int cms, bool process_io) override;
     69   void WakeUp() override;
     70 
     71   Socket * WrapSocket(Socket * sock, int type);
     72   AsyncSocket * WrapSocket(AsyncSocket * sock, int type);
     73 
     74  private:
     75   SocketServer * server_;
     76   FirewallManager * manager_;
     77   CriticalSection crit_;
     78   struct Rule {
     79     bool allow;
     80     FirewallProtocol p;
     81     FirewallDirection d;
     82     SocketAddress src;
     83     SocketAddress dst;
     84   };
     85   std::vector<Rule> rules_;
     86   bool should_delete_server_;
     87   bool udp_sockets_enabled_;
     88   bool tcp_sockets_enabled_;
     89   bool tcp_listen_enabled_;
     90 };
     91 
     92 // FirewallManager allows you to manage firewalls in multiple threads together
     93 
     94 class FirewallManager {
     95  public:
     96   FirewallManager();
     97   ~FirewallManager();
     98 
     99   void AddServer(FirewallSocketServer * server);
    100   void RemoveServer(FirewallSocketServer * server);
    101 
    102   void AddRule(bool allow, FirewallProtocol p = FP_ANY,
    103                FirewallDirection d = FD_ANY,
    104                const SocketAddress& addr = SocketAddress());
    105   void ClearRules();
    106 
    107  private:
    108   CriticalSection crit_;
    109   std::vector<FirewallSocketServer *> servers_;
    110 };
    111 
    112 }  // namespace rtc
    113 
    114 #endif  // WEBRTC_BASE_FIREWALLSOCKETSERVER_H_
    115