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      1 /*
      2  * libjingle
      3  * Copyright 2004--2005, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "talk/p2p/base/udpport.h"
     29 
     30 #include "talk/base/asyncpacketsocket.h"
     31 #include "talk/base/logging.h"
     32 #include "talk/p2p/base/common.h"
     33 
     34 namespace cricket {
     35 
     36 const std::string LOCAL_PORT_TYPE("local");
     37 
     38 UDPPort::UDPPort(talk_base::Thread* thread,
     39                  talk_base::PacketSocketFactory* factory,
     40                  talk_base::Network* network,
     41                  uint32 ip, int min_port, int max_port)
     42     : Port(thread, LOCAL_PORT_TYPE, factory, network, ip, min_port, max_port),
     43       socket_(NULL),
     44       error_(0) {
     45 }
     46 
     47 bool UDPPort::Init() {
     48   socket_ =  factory_->CreateUdpSocket(
     49       talk_base::SocketAddress(ip_, 0), min_port_, max_port_);
     50   if (!socket_) {
     51     LOG_J(LS_WARNING, this) << "UDP socket creation failed";
     52     return false;
     53   }
     54   socket_->SignalReadPacket.connect(this, &UDPPort::OnReadPacket);
     55   return true;
     56 }
     57 
     58 UDPPort::~UDPPort() {
     59   delete socket_;
     60 }
     61 
     62 void UDPPort::PrepareAddress() {
     63   bool allocated;
     64   talk_base::SocketAddress address = socket_->GetLocalAddress(&allocated);
     65   if (allocated) {
     66     AddAddress(address, "udp", true);
     67   } else {
     68     socket_->SignalAddressReady.connect(this, &UDPPort::OnAddresReady);
     69   }
     70 }
     71 
     72 Connection* UDPPort::CreateConnection(const Candidate& address,
     73                                       CandidateOrigin origin) {
     74   if (address.protocol() != "udp")
     75     return NULL;
     76 
     77   Connection* conn = new ProxyConnection(this, 0, address);
     78   AddConnection(conn);
     79   return conn;
     80 }
     81 
     82 int UDPPort::SendTo(const void* data, size_t size,
     83                     const talk_base::SocketAddress& addr, bool payload) {
     84   int sent = socket_->SendTo(data, size, addr);
     85   if (sent < 0) {
     86     error_ = socket_->GetError();
     87     LOG_J(LS_ERROR, this) << "UDP send of " << size
     88                           << " bytes failed with error " << error_;
     89   }
     90   return sent;
     91 }
     92 
     93 int UDPPort::SetOption(talk_base::Socket::Option opt, int value) {
     94   return socket_->SetOption(opt, value);
     95 }
     96 
     97 int UDPPort::GetError() {
     98   return error_;
     99 }
    100 
    101 void UDPPort::OnAddresReady(talk_base::AsyncPacketSocket* socket,
    102                             const talk_base::SocketAddress& address) {
    103   AddAddress(address, "udp", true);
    104 }
    105 
    106 void UDPPort::OnReadPacket(
    107     talk_base::AsyncPacketSocket* socket, const char* data, size_t size,
    108     const talk_base::SocketAddress& remote_addr) {
    109   ASSERT(socket == socket_);
    110   if (Connection* conn = GetConnection(remote_addr)) {
    111     conn->OnReadPacket(data, size);
    112   } else {
    113     Port::OnReadPacket(data, size, remote_addr);
    114   }
    115 }
    116 
    117 }  // namespace cricket
    118