d371a29227
1) Change AsyncSocket's SignalReadEvent and SignalWriteEvent's thread mode to multi_threaded_local as they can be accessed from different threads. 2) Protect NATServer::TransEntry::whitelist. 3) Protect PhysicalSocket:error_. Detail failures can be seen from issue 2080, comment #5. TBR=fischman@webrtc.org RISK=P1 TEST=try bots and tsanv2 BUG=2080 Review URL: https://webrtc-codereview.appspot.com/2669005 git-svn-id: http://webrtc.googlecode.com/svn/trunk@5026 4adac7df-926f-26a2-2b94-8c16560cd09d
126 lines
4.4 KiB
C++
126 lines
4.4 KiB
C++
/*
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* libjingle
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* Copyright 2004--2005, Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TALK_BASE_NATSERVER_H_
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#define TALK_BASE_NATSERVER_H_
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#include <map>
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#include <set>
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#include "talk/base/asyncudpsocket.h"
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#include "talk/base/socketaddresspair.h"
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#include "talk/base/thread.h"
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#include "talk/base/socketfactory.h"
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#include "talk/base/nattypes.h"
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namespace talk_base {
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// Change how routes (socketaddress pairs) are compared based on the type of
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// NAT. The NAT server maintains a hashtable of the routes that it knows
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// about. So these affect which routes are treated the same.
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struct RouteCmp {
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explicit RouteCmp(NAT* nat);
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size_t operator()(const SocketAddressPair& r) const;
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bool operator()(
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const SocketAddressPair& r1, const SocketAddressPair& r2) const;
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bool symmetric;
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};
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// Changes how addresses are compared based on the filtering rules of the NAT.
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struct AddrCmp {
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explicit AddrCmp(NAT* nat);
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size_t operator()(const SocketAddress& r) const;
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bool operator()(const SocketAddress& r1, const SocketAddress& r2) const;
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bool use_ip;
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bool use_port;
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};
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// Implements the NAT device. It listens for packets on the internal network,
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// translates them, and sends them out over the external network.
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const int NAT_SERVER_PORT = 4237;
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class NATServer : public sigslot::has_slots<> {
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public:
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NATServer(
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NATType type, SocketFactory* internal, const SocketAddress& internal_addr,
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SocketFactory* external, const SocketAddress& external_ip);
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~NATServer();
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SocketAddress internal_address() const {
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return server_socket_->GetLocalAddress();
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}
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// Packets received on one of the networks.
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void OnInternalPacket(AsyncPacketSocket* socket, const char* buf,
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size_t size, const SocketAddress& addr);
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void OnExternalPacket(AsyncPacketSocket* socket, const char* buf,
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size_t size, const SocketAddress& remote_addr);
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private:
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typedef std::set<SocketAddress, AddrCmp> AddressSet;
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/* Records a translation and the associated external socket. */
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struct TransEntry {
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TransEntry(const SocketAddressPair& r, AsyncUDPSocket* s, NAT* nat);
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~TransEntry();
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void WhitelistInsert(const SocketAddress& addr);
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bool WhitelistContains(const SocketAddress& ext_addr);
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SocketAddressPair route;
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AsyncUDPSocket* socket;
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AddressSet* whitelist;
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CriticalSection crit_;
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};
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typedef std::map<SocketAddressPair, TransEntry*, RouteCmp> InternalMap;
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typedef std::map<SocketAddress, TransEntry*> ExternalMap;
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/* Creates a new entry that translates the given route. */
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void Translate(const SocketAddressPair& route);
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/* Determines whether the NAT would filter out a packet from this address. */
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bool ShouldFilterOut(TransEntry* entry, const SocketAddress& ext_addr);
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NAT* nat_;
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SocketFactory* internal_;
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SocketFactory* external_;
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SocketAddress external_ip_;
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AsyncUDPSocket* server_socket_;
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AsyncSocket* tcp_server_socket_;
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InternalMap* int_map_;
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ExternalMap* ext_map_;
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DISALLOW_EVIL_CONSTRUCTORS(NATServer);
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};
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} // namespace talk_base
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#endif // TALK_BASE_NATSERVER_H_
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