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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/base/dscp.h"
     29 #include "talk/base/testclient.h"
     30 #include "talk/base/thread.h"
     31 #include "talk/base/timeutils.h"
     32 
     33 namespace talk_base {
     34 
     35 // DESIGN: Each packet received is put it into a list of packets.
     36 //         Callers can retrieve received packets from any thread by calling
     37 //         NextPacket.
     38 
     39 TestClient::TestClient(AsyncPacketSocket* socket)
     40     : socket_(socket), ready_to_send_(false) {
     41   packets_ = new std::vector<Packet*>();
     42   socket_->SignalReadPacket.connect(this, &TestClient::OnPacket);
     43   socket_->SignalReadyToSend.connect(this, &TestClient::OnReadyToSend);
     44 }
     45 
     46 TestClient::~TestClient() {
     47   delete socket_;
     48   for (unsigned i = 0; i < packets_->size(); i++)
     49     delete (*packets_)[i];
     50   delete packets_;
     51 }
     52 
     53 bool TestClient::CheckConnState(AsyncPacketSocket::State state) {
     54   // Wait for our timeout value until the socket reaches the desired state.
     55   uint32 end = TimeAfter(kTimeout);
     56   while (socket_->GetState() != state && TimeUntil(end) > 0)
     57     Thread::Current()->ProcessMessages(1);
     58   return (socket_->GetState() == state);
     59 }
     60 
     61 int TestClient::Send(const char* buf, size_t size) {
     62   return socket_->Send(buf, size, DSCP_NO_CHANGE);
     63 }
     64 
     65 int TestClient::SendTo(const char* buf, size_t size,
     66                        const SocketAddress& dest) {
     67   return socket_->SendTo(buf, size, dest, DSCP_NO_CHANGE);
     68 }
     69 
     70 TestClient::Packet* TestClient::NextPacket() {
     71   // If no packets are currently available, we go into a get/dispatch loop for
     72   // at most 1 second.  If, during the loop, a packet arrives, then we can stop
     73   // early and return it.
     74 
     75   // Note that the case where no packet arrives is important.  We often want to
     76   // test that a packet does not arrive.
     77 
     78   // Note also that we only try to pump our current thread's message queue.
     79   // Pumping another thread's queue could lead to messages being dispatched from
     80   // the wrong thread to non-thread-safe objects.
     81 
     82   uint32 end = TimeAfter(kTimeout);
     83   while (TimeUntil(end) > 0) {
     84     {
     85       CritScope cs(&crit_);
     86       if (packets_->size() != 0) {
     87         break;
     88       }
     89     }
     90     Thread::Current()->ProcessMessages(1);
     91   }
     92 
     93   // Return the first packet placed in the queue.
     94   Packet* packet = NULL;
     95   CritScope cs(&crit_);
     96   if (packets_->size() > 0) {
     97     packet = packets_->front();
     98     packets_->erase(packets_->begin());
     99   }
    100 
    101   return packet;
    102 }
    103 
    104 bool TestClient::CheckNextPacket(const char* buf, size_t size,
    105                                  SocketAddress* addr) {
    106   bool res = false;
    107   Packet* packet = NextPacket();
    108   if (packet) {
    109     res = (packet->size == size && std::memcmp(packet->buf, buf, size) == 0);
    110     if (addr)
    111       *addr = packet->addr;
    112     delete packet;
    113   }
    114   return res;
    115 }
    116 
    117 bool TestClient::CheckNoPacket() {
    118   bool res;
    119   Packet* packet = NextPacket();
    120   res = (packet == NULL);
    121   delete packet;
    122   return res;
    123 }
    124 
    125 int TestClient::GetError() {
    126   return socket_->GetError();
    127 }
    128 
    129 int TestClient::SetOption(Socket::Option opt, int value) {
    130   return socket_->SetOption(opt, value);
    131 }
    132 
    133 bool TestClient::ready_to_send() const {
    134   return ready_to_send_;
    135 }
    136 
    137 void TestClient::OnPacket(AsyncPacketSocket* socket, const char* buf,
    138                           size_t size, const SocketAddress& remote_addr,
    139                           const PacketTime& packet_time) {
    140   CritScope cs(&crit_);
    141   packets_->push_back(new Packet(remote_addr, buf, size));
    142 }
    143 
    144 void TestClient::OnReadyToSend(AsyncPacketSocket* socket) {
    145   ready_to_send_ = true;
    146 }
    147 
    148 TestClient::Packet::Packet(const SocketAddress& a, const char* b, size_t s)
    149     : addr(a), buf(0), size(s) {
    150   buf = new char[size];
    151   memcpy(buf, b, size);
    152 }
    153 
    154 TestClient::Packet::Packet(const Packet& p)
    155     : addr(p.addr), buf(0), size(p.size) {
    156   buf = new char[size];
    157   memcpy(buf, p.buf, size);
    158 }
    159 
    160 TestClient::Packet::~Packet() {
    161   delete[] buf;
    162 }
    163 
    164 }  // namespace talk_base
    165