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Diffstat (limited to 'modules/enet/networked_multiplayer_enet.cpp')
-rw-r--r--modules/enet/networked_multiplayer_enet.cpp71
1 files changed, 54 insertions, 17 deletions
diff --git a/modules/enet/networked_multiplayer_enet.cpp b/modules/enet/networked_multiplayer_enet.cpp
index 4134ed037f..b4dfa9c62e 100644
--- a/modules/enet/networked_multiplayer_enet.cpp
+++ b/modules/enet/networked_multiplayer_enet.cpp
@@ -1,3 +1,31 @@
+/*************************************************************************/
+/* networked_multiplayer_enet.cpp */
+/*************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* http://www.godotengine.org */
+/*************************************************************************/
+/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
+/* */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the */
+/* "Software"), to deal in the Software without restriction, including */
+/* without limitation the rights to use, copy, modify, merge, publish, */
+/* distribute, sublicense, and/or sell copies of the Software, and to */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions: */
+/* */
+/* The above copyright notice and this permission notice shall be */
+/* included in all copies or substantial portions of the Software. */
+/* */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
+/*************************************************************************/
#include "os/os.h"
#include "io/marshalls.h"
#include "networked_multiplayer_enet.h"
@@ -32,7 +60,7 @@ Error NetworkedMultiplayerENet::create_server(int p_port, int p_max_clients, int
host = enet_host_create (& address /* the address to bind the server host to */,
p_max_clients /* allow up to 32 clients and/or outgoing connections */,
- 2 /* allow up to 2 channels to be used, 0 and 1 */,
+ SYSCH_MAX /* allow up to SYSCH_MAX channels to be used */,
p_in_bandwidth /* assume any amount of incoming bandwidth */,
p_out_bandwidth /* assume any amount of outgoing bandwidth */);
@@ -52,7 +80,7 @@ Error NetworkedMultiplayerENet::create_client(const IP_Address& p_ip, int p_port
host = enet_host_create (NULL /* create a client host */,
1 /* only allow 1 outgoing connection */,
- 2 /* allow up 2 channels to be used, 0 and 1 */,
+ SYSCH_MAX /* allow up to SYSCH_MAX channels to be used */,
p_in_bandwidth /* 56K modem with 56 Kbps downstream bandwidth */,
p_out_bandwidth /* 56K modem with 14 Kbps upstream bandwidth */);
@@ -70,8 +98,8 @@ Error NetworkedMultiplayerENet::create_client(const IP_Address& p_ip, int p_port
unique_id=_gen_unique_id();
- /* Initiate the connection, allocating the two channels 0 and 1. */
- ENetPeer *peer = enet_host_connect (host, & address, 2, unique_id);
+ /* Initiate the connection, allocating the enough channels */
+ ENetPeer *peer = enet_host_connect (host, & address, SYSCH_MAX, unique_id);
if (peer == NULL) {
enet_host_destroy(host);
@@ -148,12 +176,12 @@ void NetworkedMultiplayerENet::poll(){
ENetPacket * packet = enet_packet_create (NULL,8,ENET_PACKET_FLAG_RELIABLE);
encode_uint32(SYSMSG_ADD_PEER,&packet->data[0]);
encode_uint32(E->key(),&packet->data[4]);
- enet_peer_send(event.peer,1,packet);
+ enet_peer_send(event.peer,SYSCH_CONFIG,packet);
//send the new peer to existing peers
packet = enet_packet_create (NULL,8,ENET_PACKET_FLAG_RELIABLE);
encode_uint32(SYSMSG_ADD_PEER,&packet->data[0]);
encode_uint32(*new_id,&packet->data[4]);
- enet_peer_send(E->get(),1,packet);
+ enet_peer_send(E->get(),SYSCH_CONFIG,packet);
}
} else {
@@ -185,7 +213,7 @@ void NetworkedMultiplayerENet::poll(){
ENetPacket* packet = enet_packet_create (NULL,8,ENET_PACKET_FLAG_RELIABLE);
encode_uint32(SYSMSG_REMOVE_PEER,&packet->data[0]);
encode_uint32(*id,&packet->data[4]);
- enet_peer_send(E->get(),1,packet);
+ enet_peer_send(E->get(),SYSCH_CONFIG,packet);
}
} else if (!server) {
emit_signal("server_disconnected");
@@ -204,10 +232,13 @@ void NetworkedMultiplayerENet::poll(){
case ENET_EVENT_TYPE_RECEIVE: {
- if (event.channelID==1) {
+ if (event.channelID==SYSCH_CONFIG) {
//some config message
ERR_CONTINUE( event.packet->dataLength < 8);
+ // Only server can send config messages
+ ERR_CONTINUE( server );
+
int msg = decode_uint32(&event.packet->data[0]);
int id = decode_uint32(&event.packet->data[4]);
@@ -226,12 +257,12 @@ void NetworkedMultiplayerENet::poll(){
}
enet_packet_destroy(event.packet);
- } else if (event.channelID==0){
+ } else if (event.channelID < SYSCH_MAX){
Packet packet;
packet.packet = event.packet;
- int *id = (int*)event.peer -> data;
+ uint32_t *id = (uint32_t*)event.peer->data;
ERR_CONTINUE(event.packet->dataLength<12)
@@ -243,6 +274,8 @@ void NetworkedMultiplayerENet::poll(){
packet.from=source;
if (server) {
+ // Someone is cheating and trying to fake the source!
+ ERR_CONTINUE(source!=*id);
packet.from=*id;
@@ -258,7 +291,7 @@ void NetworkedMultiplayerENet::poll(){
ENetPacket* packet2 = enet_packet_create (packet.packet->data,packet.packet->dataLength,flags);
- enet_peer_send(E->get(),0,packet2);
+ enet_peer_send(E->get(),event.channelID,packet2);
}
} else if (target<0) {
@@ -272,7 +305,7 @@ void NetworkedMultiplayerENet::poll(){
ENetPacket* packet2 = enet_packet_create (packet.packet->data,packet.packet->dataLength,flags);
- enet_peer_send(E->get(),0,packet2);
+ enet_peer_send(E->get(),event.channelID,packet2);
}
if (-target != 1) {
@@ -289,7 +322,7 @@ void NetworkedMultiplayerENet::poll(){
} else {
//to someone else, specifically
ERR_CONTINUE(!peer_map.has(target));
- enet_peer_send(peer_map[target],0,packet.packet);
+ enet_peer_send(peer_map[target],event.channelID,packet.packet);
}
} else {
@@ -369,16 +402,20 @@ Error NetworkedMultiplayerENet::put_packet(const uint8_t *p_buffer,int p_buffer_
ERR_FAIL_COND_V(connection_status!=CONNECTION_CONNECTED,ERR_UNCONFIGURED);
int packet_flags=0;
+ int channel=SYSCH_RELIABLE;
switch(transfer_mode) {
case TRANSFER_MODE_UNRELIABLE: {
packet_flags=ENET_PACKET_FLAG_UNSEQUENCED;
+ channel=SYSCH_UNRELIABLE;
} break;
case TRANSFER_MODE_UNRELIABLE_ORDERED: {
packet_flags=0;
+ channel=SYSCH_UNRELIABLE;
} break;
case TRANSFER_MODE_RELIABLE: {
packet_flags=ENET_PACKET_FLAG_RELIABLE;
+ channel=SYSCH_RELIABLE;
} break;
}
@@ -402,7 +439,7 @@ Error NetworkedMultiplayerENet::put_packet(const uint8_t *p_buffer,int p_buffer_
if (server) {
if (target_peer==0) {
- enet_host_broadcast(host,0,packet);
+ enet_host_broadcast(host,channel,packet);
} else if (target_peer<0) {
//send to all but one
//and make copies for sending
@@ -416,18 +453,18 @@ Error NetworkedMultiplayerENet::put_packet(const uint8_t *p_buffer,int p_buffer_
ENetPacket* packet2 = enet_packet_create (packet->data,packet->dataLength,packet_flags);
- enet_peer_send(F->get(),0,packet2);
+ enet_peer_send(F->get(),channel,packet2);
}
enet_packet_destroy(packet); //original packet no longer needed
} else {
- enet_peer_send (E->get(), 0, packet);
+ enet_peer_send (E->get(), channel, packet);
}
} else {
ERR_FAIL_COND_V(!peer_map.has(1),ERR_BUG);
- enet_peer_send (peer_map[1], 0, packet); //send to server for broadcast..
+ enet_peer_send (peer_map[1], channel, packet); //send to server for broadcast..
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-19 20:26:06 +0000