[1282] | 1 | /* |
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| 2 | * ORXONOX - the hottest 3D action shooter ever to exist |
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| 3 | * > www.orxonox.net < |
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| 4 | * |
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| 5 | * |
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| 6 | * License notice: |
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| 7 | * |
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| 8 | * This program is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU General Public License |
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| 10 | * as published by the Free Software Foundation; either version 2 |
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| 11 | * of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * This program is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | * GNU General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU General Public License |
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| 19 | * along with this program; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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| 21 | * |
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| 22 | * Author: |
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| 23 | * Oliver Scheuss, (C) 2007 |
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| 24 | * Co-authors: |
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| 25 | * ... |
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| 26 | * |
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| 27 | */ |
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| 28 | |
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| 29 | // |
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| 30 | // C++ Interface: ConnectionManager |
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| 31 | // |
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| 32 | // Description: The Class ConnectionManager manages the servers conenctions to the clients. |
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| 33 | // each connection is provided by a new process. communication between master process and |
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| 34 | // connection processes is provided by ... |
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| 35 | // |
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| 36 | // |
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| 37 | // Author: Oliver Scheuss |
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| 38 | // |
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| 39 | |
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| 40 | #include <iostream> |
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[1666] | 41 | #include <assert.h> |
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[1282] | 42 | // boost.thread library for multithreading support |
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| 43 | #include <boost/bind.hpp> |
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| 44 | |
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| 45 | #include "core/CoreIncludes.h" |
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| 46 | #include "core/BaseObject.h" |
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[1502] | 47 | #include "objects/SpaceShip.h" |
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[1282] | 48 | #include "util/Math.h" |
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[1502] | 49 | #include "util/Sleep.h" |
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[1282] | 50 | #include "ClientInformation.h" |
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| 51 | #include "ConnectionManager.h" |
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| 52 | #include "Synchronisable.h" |
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| 53 | |
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| 54 | namespace std |
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| 55 | { |
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| 56 | bool operator< (ENetAddress a, ENetAddress b) { |
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| 57 | if(a.host <= b.host) |
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| 58 | return true; |
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| 59 | else |
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| 60 | return false; |
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| 61 | } |
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| 62 | } |
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| 63 | |
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| 64 | namespace network |
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| 65 | { |
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| 66 | //boost::thread_group network_threads; |
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| 67 | |
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[1666] | 68 | ConnectionManager *ConnectionManager::instance_=0; |
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[1282] | 69 | |
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[1666] | 70 | ConnectionManager::ConnectionManager():receiverThread_(0){ |
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| 71 | assert(instance_==0); |
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| 72 | instance_=this; |
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[1282] | 73 | quit=false; |
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| 74 | bindAddress.host = ENET_HOST_ANY; |
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| 75 | bindAddress.port = NETWORK_PORT; |
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| 76 | } |
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[1666] | 77 | boost::recursive_mutex ConnectionManager::enet_mutex_; |
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[1502] | 78 | |
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[1666] | 79 | // ConnectionManager::ConnectionManager(ClientInformation *head) : receiverThread_(0) { |
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| 80 | // assert(instance_==0); |
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| 81 | // instance_=this; |
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| 82 | // quit=false; |
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| 83 | // bindAddress.host = ENET_HOST_ANY; |
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| 84 | // bindAddress.port = NETWORK_PORT; |
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| 85 | // } |
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| 86 | |
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| 87 | ConnectionManager::ConnectionManager(int port){ |
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| 88 | assert(instance_==0); |
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| 89 | instance_=this; |
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[1502] | 90 | quit=false; |
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| 91 | bindAddress.host = ENET_HOST_ANY; |
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| 92 | bindAddress.port = port; |
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| 93 | } |
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[1282] | 94 | |
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[1666] | 95 | ConnectionManager::ConnectionManager(int port, std::string address) :receiverThread_(0) { |
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| 96 | assert(instance_==0); |
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| 97 | instance_=this; |
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[1282] | 98 | quit=false; |
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| 99 | enet_address_set_host (& bindAddress, address.c_str()); |
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| 100 | bindAddress.port = NETWORK_PORT; |
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| 101 | } |
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| 102 | |
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[1666] | 103 | ConnectionManager::ConnectionManager(int port, const char *address) : receiverThread_(0) { |
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| 104 | assert(instance_==0); |
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| 105 | instance_=this; |
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[1282] | 106 | quit=false; |
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| 107 | enet_address_set_host (& bindAddress, address); |
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| 108 | bindAddress.port = NETWORK_PORT; |
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| 109 | } |
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[1666] | 110 | |
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| 111 | ConnectionManager::~ConnectionManager(){ |
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| 112 | instance_=0; |
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| 113 | if(!quit) |
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| 114 | quitListener(); |
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| 115 | } |
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[1282] | 116 | |
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[1502] | 117 | /*ENetPacket *ConnectionManager::getPacket(ENetAddress &address) { |
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[1282] | 118 | if(!buffer.isEmpty()) |
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| 119 | return buffer.pop(address); |
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| 120 | else |
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| 121 | return NULL; |
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[1502] | 122 | }*/ |
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[1282] | 123 | /** |
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| 124 | This function only pops the first element in PacketBuffer (first in first out) |
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| 125 | used by processQueue in Server.cc |
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| 126 | */ |
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[1502] | 127 | /*ENetPacket *ConnectionManager::getPacket(int &clientID) { |
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[1282] | 128 | ENetAddress address; |
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| 129 | ENetPacket *packet=getPacket(address); |
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| 130 | ClientInformation *temp =head_->findClient(&address); |
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[1360] | 131 | if(!temp) |
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| 132 | return NULL; |
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[1282] | 133 | clientID=temp->getID(); |
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| 134 | return packet; |
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[1502] | 135 | }*/ |
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| 136 | |
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| 137 | ENetEvent *ConnectionManager::getEvent(){ |
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| 138 | if(!buffer.isEmpty()) |
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| 139 | return buffer.pop(); |
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| 140 | else |
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| 141 | return NULL; |
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[1282] | 142 | } |
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| 143 | |
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| 144 | bool ConnectionManager::queueEmpty() { |
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| 145 | return buffer.isEmpty(); |
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| 146 | } |
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| 147 | |
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| 148 | void ConnectionManager::createListener() { |
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| 149 | receiverThread_ = new boost::thread(boost::bind(&ConnectionManager::receiverThread, this)); |
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| 150 | //network_threads.create_thread(boost::bind(boost::mem_fn(&ConnectionManager::receiverThread), this)); |
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| 151 | //boost::thread thr(boost::bind(boost::mem_fn(&ConnectionManager::receiverThread), this)); |
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| 152 | return; |
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| 153 | } |
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| 154 | |
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| 155 | bool ConnectionManager::quitListener() { |
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| 156 | quit=true; |
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| 157 | //network_threads.join_all(); |
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| 158 | receiverThread_->join(); |
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| 159 | return true; |
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| 160 | } |
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[1666] | 161 | |
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| 162 | // bool ConnectionManager::addPacket(Packet::Packet *packet){ |
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| 163 | // ClientInformation *temp = instance_->head_->findClient(packet->getClientID()); |
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| 164 | // if(!temp){ |
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| 165 | // COUT(3) << "C.Man: addPacket findClient failed" << std::endl; |
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| 166 | // return false; |
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| 167 | // } |
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| 168 | // ENetPacket *packet = new ENetPacket; |
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| 169 | // // TODO: finish implementation |
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| 170 | // } |
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| 171 | // |
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| 172 | |
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[1282] | 173 | bool ConnectionManager::addPacket(ENetPacket *packet, ENetPeer *peer) { |
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[1666] | 174 | boost::recursive_mutex::scoped_lock lock(instance_->enet_mutex_); |
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| 175 | if(enet_peer_send(peer, NETWORK_DEFAULT_CHANNEL, packet)!=0) |
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[1282] | 176 | return false; |
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| 177 | return true; |
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| 178 | } |
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| 179 | |
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| 180 | bool ConnectionManager::addPacket(ENetPacket *packet, int clientID) { |
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[1666] | 181 | ClientInformation *temp = ClientInformation::findClient(clientID); |
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[1502] | 182 | if(!temp){ |
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| 183 | COUT(3) << "C.Man: addPacket findClient failed" << std::endl; |
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[1282] | 184 | return false; |
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[1502] | 185 | } |
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[1666] | 186 | return addPacket(packet, temp->getPeer()); |
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[1282] | 187 | } |
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| 188 | |
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| 189 | bool ConnectionManager::addPacketAll(ENetPacket *packet) { |
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[1666] | 190 | if(!instance_) |
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| 191 | return false; |
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| 192 | boost::recursive_mutex::scoped_lock lock(instance_->enet_mutex_); |
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| 193 | for(ClientInformation *i=ClientInformation::getBegin()->next(); i!=0; i=i->next()){ |
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[1534] | 194 | COUT(3) << "adding broadcast packet for client: " << i->getID() << std::endl; |
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| 195 | if(enet_peer_send(i->getPeer(), 0, packet)!=0) |
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[1282] | 196 | return false; |
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| 197 | } |
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| 198 | return true; |
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| 199 | } |
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| 200 | |
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[1502] | 201 | // we actually dont need that function, because host_service does that for us |
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[1282] | 202 | bool ConnectionManager::sendPackets() { |
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[1666] | 203 | if(server==NULL || !instance_) |
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[1282] | 204 | return false; |
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[1502] | 205 | boost::recursive_mutex::scoped_lock lock(enet_mutex_); |
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| 206 | enet_host_flush(server); |
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| 207 | lock.unlock(); |
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| 208 | return true; |
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[1282] | 209 | } |
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| 210 | |
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| 211 | void ConnectionManager::receiverThread() { |
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| 212 | // what about some error-handling here ? |
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[1502] | 213 | ENetEvent *event; |
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[1282] | 214 | atexit(enet_deinitialize); |
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[1502] | 215 | { //scope of the mutex |
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| 216 | boost::recursive_mutex::scoped_lock lock(enet_mutex_); |
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| 217 | enet_initialize(); |
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| 218 | server = enet_host_create(&bindAddress, NETWORK_MAX_CONNECTIONS, 0, 0); |
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| 219 | lock.unlock(); |
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| 220 | } |
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[1282] | 221 | if(server==NULL){ |
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| 222 | // add some error handling here ========================== |
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| 223 | quit=true; |
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| 224 | return; |
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| 225 | } |
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| 226 | |
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[1502] | 227 | event = new ENetEvent; |
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[1282] | 228 | while(!quit){ |
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[1502] | 229 | { //mutex scope |
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| 230 | boost::recursive_mutex::scoped_lock lock(enet_mutex_); |
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| 231 | if(enet_host_service(server, event, NETWORK_WAIT_TIMEOUT)<0){ |
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| 232 | // we should never reach this point |
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| 233 | quit=true; |
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| 234 | continue; |
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| 235 | // add some error handling here ======================== |
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| 236 | } |
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| 237 | lock.unlock(); |
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[1282] | 238 | } |
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| 239 | switch(event->type){ |
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| 240 | // log handling ================ |
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| 241 | case ENET_EVENT_TYPE_CONNECT: |
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[1502] | 242 | COUT(3) << "adding event_type_connect to queue" << std::endl; |
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| 243 | case ENET_EVENT_TYPE_DISCONNECT: |
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| 244 | //addClient(event); |
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[1282] | 245 | //this is a workaround to ensure thread safety |
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[1502] | 246 | //COUT(5) << "Con.Man: connection event has occured" << std::endl; |
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| 247 | //break; |
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[1282] | 248 | case ENET_EVENT_TYPE_RECEIVE: |
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| 249 | //std::cout << "received data" << std::endl; |
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| 250 | COUT(5) << "Con.Man: receive event has occured" << std::endl; |
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| 251 | // only add, if client has connected yet and not been disconnected |
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[1502] | 252 | //if(head_->findClient(&event->peer->address)) |
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[1282] | 253 | processData(event); |
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[1502] | 254 | event = new ENetEvent; |
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| 255 | // else |
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| 256 | // COUT(3) << "received a packet from a client we don't know" << std::endl; |
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[1282] | 257 | break; |
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[1502] | 258 | //case ENET_EVENT_TYPE_DISCONNECT: |
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| 259 | //clientDisconnect(event->peer); |
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| 260 | //break; |
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[1282] | 261 | case ENET_EVENT_TYPE_NONE: |
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[1502] | 262 | //receiverThread_->yield(); |
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| 263 | usleep(1000); |
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[1282] | 264 | break; |
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| 265 | } |
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| 266 | // usleep(100); |
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[1502] | 267 | //receiverThread_->yield(); //TODO: find apropriate |
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[1282] | 268 | } |
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| 269 | disconnectClients(); |
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| 270 | // if we're finishied, destroy server |
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[1502] | 271 | { |
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| 272 | boost::recursive_mutex::scoped_lock lock(enet_mutex_); |
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| 273 | enet_host_destroy(server); |
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| 274 | lock.unlock(); |
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| 275 | } |
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[1282] | 276 | } |
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| 277 | |
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| 278 | //### added some bugfixes here, but we cannot test them because |
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| 279 | //### the server crashes everytime because of some gamestates |
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| 280 | //### (trying to resolve that now) |
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| 281 | void ConnectionManager::disconnectClients() { |
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| 282 | ENetEvent event; |
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[1666] | 283 | ClientInformation *temp = ClientInformation::getBegin()->next(); |
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[1282] | 284 | while(temp!=0){ |
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[1502] | 285 | { |
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| 286 | boost::recursive_mutex::scoped_lock lock(enet_mutex_); |
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| 287 | enet_peer_disconnect(temp->getPeer(), 0); |
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| 288 | lock.unlock(); |
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| 289 | } |
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[1282] | 290 | temp = temp->next(); |
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| 291 | } |
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| 292 | //bugfix: might be the reason why server crashes when clients disconnects |
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[1666] | 293 | temp = ClientInformation::getBegin()->next(); |
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[1502] | 294 | boost::recursive_mutex::scoped_lock lock(enet_mutex_); |
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| 295 | while( temp!=0 && enet_host_service(server, &event, NETWORK_WAIT_TIMEOUT) >= 0){ |
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[1282] | 296 | switch (event.type) |
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| 297 | { |
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| 298 | case ENET_EVENT_TYPE_NONE: break; |
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| 299 | case ENET_EVENT_TYPE_CONNECT: break; |
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| 300 | case ENET_EVENT_TYPE_RECEIVE: |
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| 301 | enet_packet_destroy(event.packet); |
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| 302 | break; |
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| 303 | case ENET_EVENT_TYPE_DISCONNECT: |
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| 304 | COUT(4) << "disconnecting all clients" << std::endl; |
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[1666] | 305 | if(ClientInformation::findClient(&(event.peer->address))) |
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| 306 | delete ClientInformation::findClient(&(event.peer->address)); |
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[1282] | 307 | //maybe needs bugfix: might also be a reason for the server to crash |
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| 308 | temp = temp->next(); |
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| 309 | break; |
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| 310 | } |
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| 311 | } |
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| 312 | return; |
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| 313 | } |
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| 314 | |
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| 315 | bool ConnectionManager::processData(ENetEvent *event) { |
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| 316 | // just add packet to the buffer |
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| 317 | // this can be extended with some preprocessing |
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| 318 | return buffer.push(event); |
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| 319 | } |
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| 320 | |
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| 321 | |
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[1502] | 322 | |
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[1282] | 323 | int ConnectionManager::getClientID(ENetPeer peer) { |
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| 324 | return getClientID(peer.address); |
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| 325 | } |
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| 326 | |
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| 327 | int ConnectionManager::getClientID(ENetAddress address) { |
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[1666] | 328 | return ClientInformation::findClient(&address)->getID(); |
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[1282] | 329 | } |
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| 330 | |
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| 331 | ENetPeer *ConnectionManager::getClientPeer(int clientID) { |
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[1666] | 332 | return ClientInformation::findClient(clientID)->getPeer(); |
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[1282] | 333 | } |
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| 334 | |
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| 335 | void ConnectionManager::syncClassid(int clientID) { |
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[1360] | 336 | unsigned int network_id=0, failures=0; |
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[1282] | 337 | std::string classname; |
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| 338 | orxonox::Identifier *id; |
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| 339 | std::map<std::string, orxonox::Identifier*>::const_iterator it = orxonox::Factory::getFactoryBegin(); |
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| 340 | while(it != orxonox::Factory::getFactoryEnd()){ |
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| 341 | id = (*it).second; |
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| 342 | if(id == NULL) |
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| 343 | continue; |
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| 344 | classname = id->getName(); |
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| 345 | network_id = id->getNetworkID(); |
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[1360] | 346 | if(network_id==0) |
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| 347 | COUT(3) << "we got a null class id: " << id->getName() << std::endl; |
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[1282] | 348 | COUT(4) << "Con.Man:syncClassid:\tnetwork_id: " << network_id << ", classname: " << classname << std::endl; |
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| 349 | |
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[1360] | 350 | while(!addPacket(packet_gen.clid( (int)network_id, classname ), clientID) && failures < 10){ |
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| 351 | failures++; |
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| 352 | } |
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[1282] | 353 | ++it; |
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| 354 | } |
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[1502] | 355 | //sendPackets(); |
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[1282] | 356 | COUT(4) << "syncClassid:\tall synchClassID packets have been sent" << std::endl; |
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| 357 | } |
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| 358 | |
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| 359 | |
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| 360 | |
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| 361 | bool ConnectionManager::removeShip(ClientInformation *client){ |
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| 362 | int id=client->getShipID(); |
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| 363 | orxonox::Iterator<orxonox::SpaceShip> it; |
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| 364 | for(it = orxonox::ObjectList<orxonox::SpaceShip>::start(); it; ++it){ |
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| 365 | if(it->objectID!=id) |
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| 366 | continue; |
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| 367 | delete *it; |
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| 368 | } |
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| 369 | return true; |
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| 370 | } |
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| 371 | |
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| 372 | bool ConnectionManager::sendWelcome(int clientID, int shipID, bool allowed){ |
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[1360] | 373 | if(addPacket(packet_gen.generateWelcome(clientID, shipID, allowed),clientID)){ |
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[1502] | 374 | //sendPackets(); |
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[1360] | 375 | return true; |
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| 376 | }else |
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| 377 | return false; |
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[1282] | 378 | } |
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| 379 | |
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| 380 | void ConnectionManager::disconnectClient(ClientInformation *client){ |
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[1502] | 381 | { |
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| 382 | boost::recursive_mutex::scoped_lock lock(enet_mutex_); |
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| 383 | enet_peer_disconnect(client->getPeer(), 0); |
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| 384 | lock.unlock(); |
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| 385 | } |
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[1282] | 386 | removeShip(client); |
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| 387 | } |
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| 388 | |
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| 389 | bool ConnectionManager::addFakeConnectRequest(ENetEvent *ev){ |
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| 390 | ENetEvent event; |
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| 391 | event.peer=ev->peer; |
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| 392 | event.packet = packet_gen.generateConnectRequest(); |
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| 393 | return buffer.push(&event); |
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| 394 | } |
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| 395 | |
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| 396 | |
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| 397 | |
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| 398 | } |
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