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source: code/branches/questsystem2/src/network/packet/Packet.cc @ 2272

Last change on this file since 2272 was 2087, checked in by landauf, 16 years ago

merged objecthierarchy branch back to trunk

  • Property svn:eol-style set to native
File size: 6.3 KB
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1/*
2 *   ORXONOX - the hottest 3D action shooter ever to exist
3 *                    > www.orxonox.net <
4 *
5 *
6 *   License notice:
7 *
8 *   This program is free software; you can redistribute it and/or
9 *   modify it under the terms of the GNU General Public License
10 *   as published by the Free Software Foundation; either version 2
11 *   of the License, or (at your option) any later version.
12 *
13 *   This program is distributed in the hope that it will be useful,
14 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
15 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 *   GNU General Public License for more details.
17 *
18 *   You should have received a copy of the GNU General Public License
19 *   along with this program; if not, write to the Free Software
20 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
21 *
22 *   Author:
23 *      Oliver Scheuss, (C) 2008
24 *   Co-authors:
25 *      ...
26 *
27 */
28
29
30#include "Packet.h"
31
32#include <cassert>
33#include <enet/enet.h>
34#include <boost/bind.hpp>
35
36#include "network/ConnectionManager.h"
37#include "network/ClientInformation.h"
38
39#include "Acknowledgement.h"
40#include "Chat.h"
41#include "ClassID.h"
42#include "Gamestate.h"
43#include "Welcome.h"
44#include "DeleteObjects.h"
45#include "network/Host.h"
46#include "core/CoreIncludes.h"
47
48namespace network{
49
50namespace packet{
51
52#define PACKET_FLAG_DEFAULT ENET_PACKET_FLAG_NO_ALLOCATE
53#define _PACKETID           0
54
55std::map<ENetPacket *, Packet *> Packet::packetMap_;
56
57Packet::Packet(){
58  flags_ = PACKET_FLAG_DEFAULT;
59  packetDirection_ = ENUM::Outgoing;
60  clientID_=0;
61  data_=0;
62  enetPacket_=0;
63  bDataENetAllocated_ = false;
64}
65
66void blub(ENetPacket *packet){
67  COUT(4) << "blubb" << std::endl;
68}
69
70Packet::Packet(uint8_t *data, unsigned int clientID){
71  flags_ = PACKET_FLAG_DEFAULT;
72  packetDirection_ = ENUM::Incoming;
73  clientID_=clientID;
74  data_=data;
75  enetPacket_=0;
76  bDataENetAllocated_ = false;
77}
78
79
80Packet::Packet(const Packet &p){
81  enetPacket_=p.enetPacket_;
82  flags_=p.flags_;
83  packetDirection_ = p.packetDirection_;
84  clientID_ = p.clientID_;
85  if(p.data_){
86    data_ = new uint8_t[p.getSize()];
87    memcpy(data_, p.data_, p.getSize());
88  }else
89    data_=0;
90  bDataENetAllocated_ = p.bDataENetAllocated_;
91}
92
93/**
94@brief
95    Destroys a packet completely.
96   
97    That also means destroying the ENetPacket if one exists. There
98*/
99Packet::~Packet(){
100  // Deallocate data_ memory if necessary.
101  if (this->bDataENetAllocated_){
102    // In this case ENet allocated data_ and will destroy it.
103  }
104  else if (this->data_) {
105    // This destructor was probably called as a consequence to ENet executing our callback.
106    // It simply serves us to be able to deallocate the packet content (data_) ourselves since
107    // we have created it in the first place.
108    delete[] this->data_;
109  }
110
111  // Destroy the ENetPacket if necessary.
112  // Note: For the case ENet used the callback to destroy the packet, we have already set
113  // enetPacket_ to NULL to avoid destroying it again.
114  if (this->enetPacket_){
115    // enetPacket_->data gets destroyed too by ENet if it was allocated by it.
116    enet_packet_destroy(enetPacket_);
117  }
118}
119
120bool Packet::send(){
121  if(packetDirection_ != ENUM::Outgoing && packetDirection_ != ENUM::Bidirectional ){
122    assert(0);
123    return false;
124  }
125  if(!enetPacket_){
126    if(!data_){
127      assert(0);
128      return false;
129    }
130    // We deliver ENet the data address so that it doesn't memcpy everything again.
131    // --> We have to delete data_ ourselves!
132    enetPacket_ = enet_packet_create(getData(), getSize(), getFlags());
133    enetPacket_->freeCallback = &Packet::deletePacket;
134    // Add the packet to a global list so we can access it again once enet calls our
135    // deletePacket method. We can of course only give a one argument function to the ENet C library.
136    packetMap_[enetPacket_] = this;
137  }
138#ifndef NDEBUG
139  switch( *(ENUM::Type *)(data_ + _PACKETID) )
140  {
141    case ENUM::Acknowledgement:
142    case ENUM::Chat:
143    case ENUM::ClassID:
144    case ENUM::Gamestate:
145    case ENUM::Welcome:
146    case ENUM::DeleteObjects:
147      break;
148    default:
149      assert(0); //there was some error, if this is the case
150      break;
151  }
152#endif
153//  ENetPacket *temp = enetPacket_;
154//  enetPacket_ = 0; // otherwise we have a double free because enet already handles the deallocation of the packet
155  network::Host::addPacket( enetPacket_, clientID_);
156  return true;
157}
158
159Packet *Packet::createPacket(ENetPacket *packet, ENetPeer *peer){
160  uint8_t *data = packet->data;
161  assert(ClientInformation::findClient(&peer->address)->getID() != (unsigned int)-2 || !Host::isServer());
162  unsigned int clientID = ClientInformation::findClient(&peer->address)->getID();
163  Packet *p;
164  COUT(5) << "packet type: " << *(ENUM::Type *)&data[_PACKETID] << std::endl;
165  switch( *(ENUM::Type *)(data + _PACKETID) )
166  {
167    case ENUM::Acknowledgement:
168      COUT(4) << "ack" << std::endl;
169      p = new Acknowledgement( data, clientID );
170      break;
171    case ENUM::Chat:
172      COUT(4) << "chat" << std::endl;
173      p = new Chat( data, clientID );
174      break;
175    case ENUM::ClassID:
176      COUT(4) << "classid" << std::endl;
177      p = new ClassID( data, clientID );
178      break;
179    case ENUM::Gamestate:
180      COUT(4) << "gamestate" << std::endl;
181      // TODO: remove brackets
182      p = new Gamestate( data, clientID );
183      break;
184    case ENUM::Welcome:
185      COUT(4) << "welcome" << std::endl;
186      p = new Welcome( data, clientID );
187      break;
188    case ENUM::DeleteObjects:
189      COUT(4) << "deleteobjects" << std::endl;
190      p = new DeleteObjects( data, clientID );
191      break;
192    default:
193      assert(0); //TODO: repair this
194      break;
195  }
196
197  // Data was created by ENet
198  p->bDataENetAllocated_ = true;
199
200  return p;
201}
202
203/**
204@brief
205    ENet calls this method whenever it wants to destroy a packet that contains
206    data we allocated ourselves.
207*/
208void Packet::deletePacket(ENetPacket *enetPacket){
209  // Get our Packet from a gloabal map with all Packets created in the send() method of Packet.
210  std::map<ENetPacket*, Packet*>::iterator it = packetMap_.find(enetPacket);
211  assert(it != packetMap_.end());
212  // Make sure we don't delete it again in the destructor
213  it->second->enetPacket_ = 0;
214  delete it->second;
215  //packetMap_.erase(it);
216  COUT(4) << "PacketMap size: " << packetMap_.size() << std::endl;
217}
218
219} // namespace packet
220
221} // namespace network
222
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