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Diffstat (limited to '')
| -rw-r--r-- | source/RCONServer.cpp | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/source/RCONServer.cpp b/source/RCONServer.cpp new file mode 100644 index 000000000..9558512eb --- /dev/null +++ b/source/RCONServer.cpp @@ -0,0 +1,289 @@ +
+// RCONServer.cpp
+
+// Implements the cRCONServer class representing the RCON server
+
+#include "Globals.h"
+#include "../iniFile/iniFile.h"
+#include "RCONServer.h"
+#include "Server.h"
+#include "Root.h"
+
+
+
+
+
+// Disable MSVC warnings:
+#if defined(_MSC_VER)
+ #pragma warning(push)
+ #pragma warning(disable:4355) // 'this' : used in base member initializer list
+#endif
+
+
+
+
+
+enum
+{
+ // Client -> Server:
+ RCON_PACKET_COMMAND = 2,
+ RCON_PACKET_LOGIN = 3,
+
+ // Server -> Client:
+ RCON_PACKET_RESPONSE = 2,
+} ;
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cRCONServer:
+
+cRCONServer::cRCONServer(cServer & a_Server) :
+ m_Server(a_Server),
+ m_ListenThread4(*this, cSocket::IPv4, "RCON"),
+ m_ListenThread6(*this, cSocket::IPv6, "RCON")
+{
+}
+
+
+
+
+
+cRCONServer::~cRCONServer()
+{
+ m_ListenThread4.Stop();
+ m_ListenThread6.Stop();
+}
+
+
+
+
+
+void cRCONServer::Initialize(cIniFile & a_IniFile)
+{
+ if (!a_IniFile.GetValueSetB("RCON", "Enabled", false))
+ {
+ return;
+ }
+
+ // Read the password, don't allow an empty one:
+ m_Password = a_IniFile.GetValueSet("RCON", "Password", "");
+ if (m_Password.empty())
+ {
+ LOGWARNING("RCON is requested, but the password is not set. RCON is now disabled.");
+ return;
+ }
+
+ // Read and initialize both IPv4 and IPv6 ports for RCON
+ bool HasAnyPorts = false;
+ AString Ports4 = a_IniFile.GetValueSet("RCON", "PortsIPv4", "25575");
+ if (m_ListenThread4.Initialize(Ports4))
+ {
+ HasAnyPorts = true;
+ m_ListenThread4.Start();
+ }
+ AString Ports6 = a_IniFile.GetValueSet("RCON", "PortsIPv6", "25575");
+ if (m_ListenThread6.Initialize(Ports6))
+ {
+ HasAnyPorts = true;
+ m_ListenThread6.Start();
+ }
+ if (!HasAnyPorts)
+ {
+ LOGWARNING("RCON is requested, but no ports are specified. Specify at least one port in PortsIPv4 or PortsIPv6. RCON is now disabled.");
+ return;
+ }
+}
+
+
+
+
+
+void cRCONServer::OnConnectionAccepted(cSocket & a_Socket)
+{
+ if (!a_Socket.IsValid())
+ {
+ return;
+ }
+
+ LOG("RCON Client \"%s\" connected!", a_Socket.GetIPString().c_str());
+
+ // Create a new cConnection object, it will be deleted when the connection is closed
+ m_SocketThreads.AddClient(a_Socket, new cConnection(*this, a_Socket));
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cRCONServer::cConnection:
+
+cRCONServer::cConnection::cConnection(cRCONServer & a_RCONServer, cSocket & a_Socket) :
+ m_IsAuthenticated(false),
+ m_RCONServer(a_RCONServer),
+ m_Socket(a_Socket),
+ m_IPAddress(a_Socket.GetIPString())
+{
+}
+
+
+
+
+
+void cRCONServer::cConnection::DataReceived(const char * a_Data, int a_Size)
+{
+ // Append data to the buffer:
+ m_Buffer.append(a_Data, a_Size);
+
+ // Process the packets in the buffer:
+ while (m_Buffer.size() >= 14)
+ {
+ int Length = IntFromBuffer(m_Buffer.data());
+ if (Length > 1500)
+ {
+ // Too long, drop the connection
+ LOGWARNING("Received an invalid RCON packet length (%d), dropping RCON connection to %s.",
+ Length, m_IPAddress.c_str()
+ );
+ m_RCONServer.m_SocketThreads.RemoveClient(this);
+ m_Socket.CloseSocket();
+ delete this;
+ return;
+ }
+ if (Length > (int)(m_Buffer.size() + 4))
+ {
+ // Incomplete packet yet, wait for more data to come
+ return;
+ }
+
+ int RequestID = IntFromBuffer(m_Buffer.data() + 4);
+ int PacketType = IntFromBuffer(m_Buffer.data() + 8);
+ if (!ProcessPacket(RequestID, PacketType, Length - 10, m_Buffer.data() + 12))
+ {
+ m_RCONServer.m_SocketThreads.RemoveClient(this);
+ m_Socket.CloseSocket();
+ delete this;
+ return;
+ }
+ m_Buffer.erase(0, Length + 4);
+ } // while (m_Buffer.size() >= 14)
+}
+
+
+
+
+
+void cRCONServer::cConnection::GetOutgoingData(AString & a_Data)
+{
+ a_Data.assign(m_Outgoing);
+ m_Outgoing.clear();
+}
+
+
+
+
+
+void cRCONServer::cConnection::SocketClosed(void)
+{
+ m_RCONServer.m_SocketThreads.RemoveClient(this);
+ delete this;
+}
+
+
+
+
+
+bool cRCONServer::cConnection::ProcessPacket(int a_RequestID, int a_PacketType, int a_PayloadLength, const char * a_Payload)
+{
+ switch (a_PacketType)
+ {
+ case RCON_PACKET_LOGIN:
+ {
+ if (strncmp(a_Payload, m_RCONServer.m_Password.c_str(), a_PayloadLength) != 0)
+ {
+ LOGINFO("RCON: Invalid password from client %s, dropping connection.", m_IPAddress.c_str());
+ return false;
+ }
+ m_IsAuthenticated = true;
+
+ LOGD("RCON: Client at %s has successfully authenticated", m_IPAddress.c_str());
+
+ // Send OK response:
+ SendResponse(a_RequestID, RCON_PACKET_RESPONSE, 0, NULL);
+ return true;
+ }
+
+ case RCON_PACKET_COMMAND:
+ {
+ AString cmd(a_Payload, a_PayloadLength);
+ LOGD("RCON command from %s: \"%s\"", m_IPAddress.c_str(), cmd.c_str());
+ cRoot::Get()->ExecuteConsoleCommand(cmd);
+
+ // Send an empty response:
+ SendResponse(a_RequestID, RCON_PACKET_RESPONSE, 0, NULL);
+ return true;
+ }
+ }
+
+ // Unknown packet type, drop the connection:
+ LOGWARNING("RCON: Client at %s has sent an unknown packet type %d, dropping connection.",
+ m_IPAddress.c_str(), a_PacketType
+ );
+ return false;
+}
+
+
+
+
+
+/// Reads 4 bytes from a_Buffer and returns the int they represent
+int cRCONServer::cConnection::IntFromBuffer(const char * a_Buffer)
+{
+ return ((unsigned char)a_Buffer[3] << 24) | ((unsigned char)a_Buffer[2] << 16) | ((unsigned char)a_Buffer[1] << 8) | (unsigned char)a_Buffer[0];
+}
+
+
+
+
+
+/// Puts 4 bytes representing the int into the buffer
+void cRCONServer::cConnection::IntToBuffer(int a_Value, char * a_Buffer)
+{
+ a_Buffer[0] = a_Value & 0xff;
+ a_Buffer[1] = (a_Value >> 8) & 0xff;
+ a_Buffer[2] = (a_Value >> 16) & 0xff;
+ a_Buffer[3] = (a_Value >> 24) & 0xff;
+}
+
+
+
+
+
+/// Sends a RCON packet back to the client
+void cRCONServer::cConnection::SendResponse(int a_RequestID, int a_PacketType, int a_PayloadLength, const char * a_Payload)
+{
+ ASSERT((a_PayloadLength == 0) || (a_Payload != NULL)); // Either zero data to send, or a valid payload ptr
+
+ char Buffer[4];
+ int Length = a_PayloadLength + 10;
+ IntToBuffer(Length, Buffer);
+ m_Outgoing.append(Buffer, 4);
+ IntToBuffer(a_RequestID, Buffer);
+ m_Outgoing.append(Buffer, 4);
+ IntToBuffer(a_PacketType, Buffer);
+ m_Outgoing.append(Buffer, 4);
+ if (a_PayloadLength > 0)
+ {
+ m_Outgoing.append(a_Payload, a_PayloadLength);
+ }
+ m_Outgoing.push_back(0);
+ m_Outgoing.push_back(0);
+ m_RCONServer.m_SocketThreads.NotifyWrite(this);
+}
+
+
+
+
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