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Brand new networked multiplayer
This commit is contained in:
Juan Linietsky
@@ -1,48 +1,38 @@
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#include "networked_multiplayer_enet.h"
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#include "os/os.h"
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#include "io/marshalls.h"
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void NetworkedMultiplayerENet::set_transfer_mode(TransferMode p_mode) {
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transfer_mode=p_mode;
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}
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void NetworkedMultiplayerENet::set_target_peer(const StringName &p_peer){
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void NetworkedMultiplayerENet::set_target_peer(int p_peer){
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target_peer=p_peer;
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}
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void NetworkedMultiplayerENet::set_channel(int p_channel){
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send_channel=p_channel;
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}
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int NetworkedMultiplayerENet::get_packet_peer() const{
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StringName NetworkedMultiplayerENet::get_packet_peer() const{
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ERR_FAIL_COND_V(!active,StringName());
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ERR_FAIL_COND_V(incoming_packets.size()==0,StringName());
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ERR_FAIL_COND_V(!active,1);
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ERR_FAIL_COND_V(incoming_packets.size()==0,1);
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return incoming_packets.front()->get().from;
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}
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int NetworkedMultiplayerENet::get_packet_channel() const{
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ERR_FAIL_COND_V(!active,0);
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ERR_FAIL_COND_V(incoming_packets.size()==0,0);
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return incoming_packets.front()->get().from_channel;
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}
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Error NetworkedMultiplayerENet::create_server(int p_port, int p_max_clients, int p_max_channels, int p_in_bandwidth, int p_out_bandwidth){
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Error NetworkedMultiplayerENet::create_server(int p_port, int p_max_clients, int p_in_bandwidth, int p_out_bandwidth){
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ERR_FAIL_COND_V(active,ERR_ALREADY_IN_USE);
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ENetAddress address;
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address.host = ENET_HOST_ANY;
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/* Bind the server to port 1234. */
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address.port = 1234;
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address.port = p_port;
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host = enet_host_create (& address /* the address to bind the server host to */,
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p_max_clients /* allow up to 32 clients and/or outgoing connections */,
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p_max_channels /* allow up to 2 channels to be used, 0 and 1 */,
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2 /* allow up to 2 channels to be used, 0 and 1 */,
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p_in_bandwidth /* assume any amount of incoming bandwidth */,
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p_out_bandwidth /* assume any amount of outgoing bandwidth */);
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@@ -50,16 +40,18 @@ Error NetworkedMultiplayerENet::create_server(int p_port, int p_max_clients, int
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active=true;
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server=true;
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refuse_connections=false;
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unique_id=1;
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connection_status=CONNECTION_CONNECTED;
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return OK;
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}
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Error NetworkedMultiplayerENet::create_client(const IP_Address& p_ip,int p_port, int p_max_channels, int p_in_bandwidth, int p_out_bandwidth){
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Error NetworkedMultiplayerENet::create_client(const IP_Address& p_ip, int p_port, int p_in_bandwidth, int p_out_bandwidth){
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ERR_FAIL_COND_V(active,ERR_ALREADY_IN_USE);
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host = enet_host_create (NULL /* create a client host */,
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1 /* only allow 1 outgoing connection */,
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p_max_channels /* allow up 2 channels to be used, 0 and 1 */,
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2 /* allow up 2 channels to be used, 0 and 1 */,
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p_in_bandwidth /* 56K modem with 56 Kbps downstream bandwidth */,
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p_out_bandwidth /* 56K modem with 14 Kbps upstream bandwidth */);
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@@ -70,8 +62,13 @@ Error NetworkedMultiplayerENet::create_client(const IP_Address& p_ip,int p_port,
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address.host=p_ip.host;
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address.port=p_port;
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//enet_address_set_host (& address, "localhost");
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//address.port = p_port;
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unique_id=_gen_unique_id();
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/* Initiate the connection, allocating the two channels 0 and 1. */
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ENetPeer *peer = enet_host_connect (host, & address, p_max_channels, 0);
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ENetPeer *peer = enet_host_connect (host, & address, 2, unique_id);
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if (peer == NULL) {
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enet_host_destroy(host);
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@@ -83,6 +80,7 @@ Error NetworkedMultiplayerENet::create_client(const IP_Address& p_ip,int p_port,
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connection_status=CONNECTION_CONNECTING;
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active=true;
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server=false;
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refuse_connections=false;
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return OK;
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}
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@@ -95,18 +93,41 @@ void NetworkedMultiplayerENet::poll(){
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ENetEvent event;
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/* Wait up to 1000 milliseconds for an event. */
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while (enet_host_service (host, & event, 1000) > 0)
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{
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while (true) {
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if (!host || !active) //might have been disconnected while emitting a notification
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return;
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int ret = enet_host_service (host, & event, 1);
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if (ret<0) {
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//error, do something?
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break;
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} else if (ret==0) {
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break;
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}
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switch (event.type)
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{
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case ENET_EVENT_TYPE_CONNECT: {
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/* Store any relevant client information here. */
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if (server && refuse_connections) {
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enet_peer_reset(event.peer);
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break;
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}
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IP_Address ip;
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ip.host=event.peer -> address.host;
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StringName *new_id = memnew( StringName );
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*new_id = String(ip) +":"+ itos(event.peer -> address.port);
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int *new_id = memnew( int );
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*new_id = event.data;
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if (*new_id==0) { //data zero is sent by server (enet won't let you configure this). Server is always 1
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*new_id=1;
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}
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event.peer->data=new_id;
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peer_map[*new_id]=event.peer;
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@@ -114,29 +135,170 @@ void NetworkedMultiplayerENet::poll(){
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emit_signal("peer_connected",*new_id);
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if (server) {
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//someone connected, let it know of all the peers available
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for (Map<int,ENetPeer*>::Element *E=peer_map.front();E;E=E->next()) {
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if (E->key()==*new_id)
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continue;
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//send existing peers to new peer
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ENetPacket * packet = enet_packet_create (NULL,8,ENET_PACKET_FLAG_RELIABLE);
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encode_uint32(SYSMSG_ADD_PEER,&packet->data[0]);
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encode_uint32(E->key(),&packet->data[4]);
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enet_peer_send(event.peer,1,packet);
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//send the new peer to existing peers
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packet = enet_packet_create (NULL,8,ENET_PACKET_FLAG_RELIABLE);
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encode_uint32(SYSMSG_ADD_PEER,&packet->data[0]);
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encode_uint32(*new_id,&packet->data[4]);
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enet_peer_send(E->get(),1,packet);
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}
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} else {
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emit_signal("connection_succeeded");
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}
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} break;
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case ENET_EVENT_TYPE_DISCONNECT: {
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/* Reset the peer's client information. */
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StringName *id = (StringName*)event.peer -> data;
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int *id = (int*)event.peer -> data;
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if (!id) {
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if (!server) {
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emit_signal("connection_failed");
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}
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} else {
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if (server) {
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//someone disconnected, let it know to everyone else
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for (Map<int,ENetPeer*>::Element *E=peer_map.front();E;E=E->next()) {
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if (E->key()==*id)
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continue;
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//send the new peer to existing peers
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ENetPacket* packet = enet_packet_create (NULL,8,ENET_PACKET_FLAG_RELIABLE);
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encode_uint32(SYSMSG_REMOVE_PEER,&packet->data[0]);
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encode_uint32(*id,&packet->data[4]);
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enet_peer_send(E->get(),1,packet);
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}
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} else if (!server) {
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emit_signal("server_disconnected");
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close_connection();
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return;
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}
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emit_signal("peer_disconnected",*id);
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peer_map.erase(*id);
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memdelete( id );
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}
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emit_signal("peer_disconnected",*id);
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peer_map.erase(*id);
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memdelete( id );
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} break;
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case ENET_EVENT_TYPE_RECEIVE: {
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Packet packet;
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packet.packet = event.packet;
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StringName *id = (StringName*)event.peer -> data;
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packet.from_channel=event.channelID;
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packet.from=*id;
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if (event.channelID==1) {
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//some config message
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ERR_CONTINUE( event.packet->dataLength < 8);
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int msg = decode_uint32(&event.packet->data[0]);
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int id = decode_uint32(&event.packet->data[4]);
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switch(msg) {
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case SYSMSG_ADD_PEER: {
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peer_map[id]=NULL;
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emit_signal("peer_connected",id);
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} break;
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case SYSMSG_REMOVE_PEER: {
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peer_map.erase(id);
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emit_signal("peer_disconnected",id);
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} break;
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}
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enet_packet_destroy(event.packet);
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} else if (event.channelID==0){
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Packet packet;
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packet.packet = event.packet;
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int *id = (int*)event.peer -> data;
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ERR_CONTINUE(event.packet->dataLength<12)
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uint32_t source = decode_uint32(&event.packet->data[0]);
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int target = decode_uint32(&event.packet->data[4]);
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uint32_t flags = decode_uint32(&event.packet->data[8]);
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packet.from=source;
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if (server) {
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packet.from=*id;
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if (target==0) {
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//re-send the everyone but sender :|
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incoming_packets.push_back(packet);
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//and make copies for sending
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for (Map<int,ENetPeer*>::Element *E=peer_map.front();E;E=E->next()) {
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if (uint32_t(E->key())==source) //do not resend to self
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continue;
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ENetPacket* packet2 = enet_packet_create (packet.packet->data,packet.packet->dataLength,flags);
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enet_peer_send(E->get(),0,packet2);
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}
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} else if (target<0) {
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//to all but one
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//and make copies for sending
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for (Map<int,ENetPeer*>::Element *E=peer_map.front();E;E=E->next()) {
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if (uint32_t(E->key())==source || E->key()==-target) //do not resend to self, also do not send to excluded
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continue;
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ENetPacket* packet2 = enet_packet_create (packet.packet->data,packet.packet->dataLength,flags);
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enet_peer_send(E->get(),0,packet2);
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}
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if (-target != 1) {
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//server is not excluded
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incoming_packets.push_back(packet);
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} else {
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//server is excluded, erase packet
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enet_packet_destroy(packet.packet);
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}
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} else if (target==1) {
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//to myself and only myself
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incoming_packets.push_back(packet);
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} else {
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//to someone else, specifically
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ERR_CONTINUE(!peer_map.has(source));
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enet_peer_send(peer_map[source],0,packet.packet);
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}
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} else {
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incoming_packets.push_back(packet);
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}
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//destroy packet later..
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} else {
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ERR_CONTINUE(true);
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}
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incoming_packets.push_back(packet);
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//destroy packet later..
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}break;
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case ENET_EVENT_TYPE_NONE: {
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@@ -154,14 +316,29 @@ bool NetworkedMultiplayerENet::is_server() const {
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void NetworkedMultiplayerENet::close_connection() {
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ERR_FAIL_COND(!active);
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if (!active)
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return;
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_pop_current_packet();
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bool peers_disconnected=false;
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for (Map<int,ENetPeer*>::Element *E=peer_map.front();E;E=E->next()) {
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if (E->get()) {
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enet_peer_disconnect_now(E->get(),unique_id);
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peers_disconnected=true;
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}
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}
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if (peers_disconnected) {
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enet_host_flush(host);
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OS::get_singleton()->delay_usec(100); //wait 100ms for disconnection packets to send
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}
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enet_host_destroy(host);
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active=false;
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incoming_packets.clear();
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unique_id=1; //server is 1
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connection_status=CONNECTION_DISCONNECTED;
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}
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@@ -178,26 +355,18 @@ Error NetworkedMultiplayerENet::get_packet(const uint8_t **r_buffer,int &r_buffe
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current_packet = incoming_packets.front()->get();
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incoming_packets.pop_front();
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r_buffer=(const uint8_t**)¤t_packet.packet->data;
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*r_buffer=(const uint8_t*)(¤t_packet.packet->data[12]);
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r_buffer_size=current_packet.packet->dataLength;
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return OK;
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}
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Error NetworkedMultiplayerENet::put_packet(const uint8_t *p_buffer,int p_buffer_size){
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ERR_FAIL_COND_V(incoming_packets.size()==0,ERR_UNAVAILABLE);
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Map<StringName,ENetPeer*>::Element *E=NULL;
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if (target_peer!=StringName()) {
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peer_map.find(target_peer);
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if (!E) {
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ERR_EXPLAIN("Invalid Target Peer: "+String(target_peer));
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ERR_FAIL_V(ERR_INVALID_PARAMETER);
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}
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}
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ERR_FAIL_COND_V(!active,ERR_UNCONFIGURED);
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ERR_FAIL_COND_V(connection_status!=CONNECTION_CONNECTED,ERR_UNCONFIGURED);
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int packet_flags=0;
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switch(transfer_mode) {
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case TRANSFER_MODE_UNRELIABLE: {
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packet_flags=ENET_PACKET_FLAG_UNSEQUENCED;
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@@ -210,13 +379,53 @@ Error NetworkedMultiplayerENet::put_packet(const uint8_t *p_buffer,int p_buffer_
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} break;
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}
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/* Create a reliable packet of size 7 containing "packet\0" */
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ENetPacket * packet = enet_packet_create (p_buffer,p_buffer_size,packet_flags);
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Map<int,ENetPeer*>::Element *E=NULL;
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if (target_peer==StringName()) {
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enet_host_broadcast(host,send_channel,packet);
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if (target_peer!=0) {
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E = peer_map.find(ABS(target_peer));
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if (!E) {
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ERR_EXPLAIN("Invalid Target Peer: "+itos(target_peer));
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ERR_FAIL_V(ERR_INVALID_PARAMETER);
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}
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}
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ENetPacket * packet = enet_packet_create (NULL,p_buffer_size+12,packet_flags);
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encode_uint32(unique_id,&packet->data[0]); //source ID
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encode_uint32(target_peer,&packet->data[4]); //dest ID
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encode_uint32(packet_flags,&packet->data[8]); //dest ID
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copymem(&packet->data[12],p_buffer,p_buffer_size);
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if (server) {
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if (target_peer==0) {
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enet_host_broadcast(host,0,packet);
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} else if (target_peer<0) {
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//send to all but one
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//and make copies for sending
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int exclude=-target_peer;
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for (Map<int,ENetPeer*>::Element *F=peer_map.front();F;F=F->next()) {
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if (F->key()==exclude) // exclude packet
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continue;
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ENetPacket* packet2 = enet_packet_create (packet->data,packet->dataLength,packet_flags);
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enet_peer_send(F->get(),0,packet2);
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}
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enet_packet_destroy(packet); //original packet no longer needed
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} else {
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enet_peer_send (E->get(), 0, packet);
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}
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} else {
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enet_peer_send (E->get(), send_channel, packet);
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ERR_FAIL_COND_V(!peer_map.has(1),ERR_BUG);
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enet_peer_send (peer_map[1], 0, packet); //send to server for broadcast..
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}
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enet_host_flush(host);
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@@ -234,7 +443,7 @@ void NetworkedMultiplayerENet::_pop_current_packet() const {
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if (current_packet.packet) {
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enet_packet_destroy(current_packet.packet);
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current_packet.packet=NULL;
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current_packet.from=StringName();
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current_packet.from=0;
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}
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}
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@@ -244,11 +453,54 @@ NetworkedMultiplayerPeer::ConnectionStatus NetworkedMultiplayerENet::get_connect
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return connection_status;
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}
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uint32_t NetworkedMultiplayerENet::_gen_unique_id() const {
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uint32_t hash = 0;
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while (hash==0 || hash==1) {
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hash = hash_djb2_one_32(
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(uint32_t)OS::get_singleton()->get_ticks_usec() );
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hash = hash_djb2_one_32(
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(uint32_t)OS::get_singleton()->get_unix_time(), hash );
|
||||
hash = hash_djb2_one_32(
|
||||
(uint32_t)OS::get_singleton()->get_data_dir().hash64(), hash );
|
||||
//hash = hash_djb2_one_32(
|
||||
// (uint32_t)OS::get_singleton()->get_unique_ID().hash64(), hash );
|
||||
hash = hash_djb2_one_32(
|
||||
(uint32_t)((uint64_t)this), hash ); //rely on aslr heap
|
||||
hash = hash_djb2_one_32(
|
||||
(uint32_t)((uint64_t)&hash), hash ); //rely on aslr stack
|
||||
|
||||
hash=hash&0x7FFFFFFF; // make it compatible with unsigned, since negatie id is used for exclusion
|
||||
}
|
||||
|
||||
return hash;
|
||||
}
|
||||
|
||||
int NetworkedMultiplayerENet::get_unique_id() const {
|
||||
|
||||
ERR_FAIL_COND_V(!active,0);
|
||||
return unique_id;
|
||||
}
|
||||
|
||||
void NetworkedMultiplayerENet::set_refuse_new_connections(bool p_enable) {
|
||||
|
||||
refuse_connections=p_enable;
|
||||
}
|
||||
|
||||
bool NetworkedMultiplayerENet::is_refusing_new_connections() const {
|
||||
|
||||
return refuse_connections;
|
||||
}
|
||||
|
||||
|
||||
void NetworkedMultiplayerENet::_bind_methods() {
|
||||
|
||||
ObjectTypeDB::bind_method(_MD("create_server","port","max_clients","max_channels","in_bandwidth","out_bandwidth"),&NetworkedMultiplayerENet::create_server,DEFVAL(32),DEFVAL(1),DEFVAL(0),DEFVAL(0));
|
||||
ObjectTypeDB::bind_method(_MD("create_client","ip","port","max_channels","in_bandwidth","out_bandwidth"),&NetworkedMultiplayerENet::create_client,DEFVAL(1),DEFVAL(0),DEFVAL(0));
|
||||
ObjectTypeDB::bind_method(_MD("disconnect"),&NetworkedMultiplayerENet::disconnect);
|
||||
ObjectTypeDB::bind_method(_MD("create_server","port","max_clients","in_bandwidth","out_bandwidth"),&NetworkedMultiplayerENet::create_server,DEFVAL(32),DEFVAL(0),DEFVAL(0));
|
||||
ObjectTypeDB::bind_method(_MD("create_client","ip","port","in_bandwidth","out_bandwidth"),&NetworkedMultiplayerENet::create_client,DEFVAL(0),DEFVAL(0));
|
||||
ObjectTypeDB::bind_method(_MD("close_connection"),&NetworkedMultiplayerENet::close_connection);
|
||||
|
||||
|
||||
}
|
||||
|
||||
@@ -257,7 +509,9 @@ NetworkedMultiplayerENet::NetworkedMultiplayerENet(){
|
||||
|
||||
active=false;
|
||||
server=false;
|
||||
send_channel=0;
|
||||
refuse_connections=false;
|
||||
unique_id=0;
|
||||
target_peer=0;
|
||||
current_packet.packet=NULL;
|
||||
transfer_mode=TRANSFER_MODE_ORDERED;
|
||||
connection_status=CONNECTION_DISCONNECTED;
|
||||
@@ -265,7 +519,5 @@ NetworkedMultiplayerENet::NetworkedMultiplayerENet(){
|
||||
|
||||
NetworkedMultiplayerENet::~NetworkedMultiplayerENet(){
|
||||
|
||||
if (active) {
|
||||
close_connection();
|
||||
}
|
||||
close_connection();
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user